X-Git-Url: https://git.saurik.com/apple/launchd.git/blobdiff_plain/f70a210cfaa6d15038f6941e4e82cc003425decd..eabd170121c913d6b497fa2503e49f09f5412ddc:/launchd/src/launchd_core_logic.c diff --git a/launchd/src/launchd_core_logic.c b/launchd/src/launchd_core_logic.c deleted file mode 100644 index 6daf059..0000000 --- a/launchd/src/launchd_core_logic.c +++ /dev/null @@ -1,9124 +0,0 @@ -/* - * @APPLE_APACHE_LICENSE_HEADER_START@ - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - * @APPLE_APACHE_LICENSE_HEADER_END@ - */ - -static const char *const __rcs_file_version__ = "$Revision: 24498 $"; - -#include "config.h" -#include "launchd_core_logic.h" - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#if HAVE_SANDBOX -#define __APPLE_API_PRIVATE -#include -#endif -#if HAVE_QUARANTINE -#include -#endif -#if TARGET_OS_EMBEDDED -#include -#else -/* To make my life easier. */ -typedef struct jetsam_priority_entry { - pid_t pid; - uint32_t flags; - int32_t hiwat_pages; - int32_t hiwat_reserved1; - int32_t hiwat_reserved2; - int32_t hiwat_reserved3; -} jetsam_priority_entry_t; - -enum { - kJetsamFlagsFrontmost = (1 << 0), - kJetsamFlagsKilled = (1 << 1) -}; -#endif - -#include "launch.h" -#include "launch_priv.h" -#include "launch_internal.h" -#include "bootstrap.h" -#include "bootstrap_priv.h" -#include "vproc.h" -#include "vproc_internal.h" - -#include "reboot2.h" - -#include "launchd.h" -#include "launchd_runtime.h" -#include "launchd_unix_ipc.h" -#include "protocol_vproc.h" -#include "protocol_vprocServer.h" -#include "protocol_job_reply.h" -#include "protocol_job_forward.h" -#include "mach_excServer.h" - -/* - * LAUNCHD_SAMPLE_TIMEOUT - * If the job hasn't exited in the given number of seconds after sending - * it a SIGTERM, start sampling it. - * LAUNCHD_DEFAULT_EXIT_TIMEOUT - * If the job hasn't exited in the given number of seconds after sending - * it a SIGTERM, SIGKILL it. Can be overriden in the job plist. - */ -#define LAUNCHD_MIN_JOB_RUN_TIME 10 -#define LAUNCHD_SAMPLE_TIMEOUT 2 -#define LAUNCHD_DEFAULT_EXIT_TIMEOUT 20 -#define LAUNCHD_SIGKILL_TIMER 5 -#define LAUNCHD_CLEAN_KILL_TIMER 1 - -#define SHUTDOWN_LOG_DIR "/var/log/shutdown" - -#define TAKE_SUBSET_NAME "TakeSubsetName" -#define TAKE_SUBSET_PID "TakeSubsetPID" -#define TAKE_SUBSET_PERPID "TakeSubsetPerPID" - -#define IS_POWER_OF_TWO(v) (!(v & (v - 1)) && v) - -extern char **environ; - -struct waiting_for_removal { - SLIST_ENTRY(waiting_for_removal) sle; - mach_port_t reply_port; -}; - -static bool waiting4removal_new(job_t j, mach_port_t rp); -static void waiting4removal_delete(job_t j, struct waiting_for_removal *w4r); - -struct waiting_for_exit { - LIST_ENTRY(waiting_for_exit) sle; - mach_port_t rp; - bool legacy; -}; - -static bool waiting4exit_new(job_t j, mach_port_t rp, bool legacy); -static void waiting4exit_delete(job_t j, struct waiting_for_exit *w4e); - -struct machservice { - SLIST_ENTRY(machservice) sle; - SLIST_ENTRY(machservice) special_port_sle; - LIST_ENTRY(machservice) name_hash_sle; - LIST_ENTRY(machservice) port_hash_sle; - job_t job; - unsigned int gen_num; - mach_port_name_t port; - unsigned int isActive :1, - reset :1, - recv :1, - hide :1, - kUNCServer :1, - per_user_hack :1, - debug_on_close :1, - per_pid :1, - delete_on_destruction :1, - drain_one_on_crash :1, - drain_all_on_crash :1, - /* Don't let the size of this field to get too small. It has to be large enough - * to represent the reasonable range of special port numbers. - */ - special_port_num :20; - - const char name[0]; -}; - -static SLIST_HEAD(, machservice) special_ports; /* hack, this should be per jobmgr_t */ - -#define PORT_HASH_SIZE 32 -#define HASH_PORT(x) (IS_POWER_OF_TWO(PORT_HASH_SIZE) ? (MACH_PORT_INDEX(x) & (PORT_HASH_SIZE - 1)) : (MACH_PORT_INDEX(x) % PORT_HASH_SIZE)) - -static LIST_HEAD(, machservice) port_hash[PORT_HASH_SIZE]; - -static void machservice_setup(launch_data_t obj, const char *key, void *context); -static void machservice_setup_options(launch_data_t obj, const char *key, void *context); -static void machservice_resetport(job_t j, struct machservice *ms); -static struct machservice *machservice_new(job_t j, const char *name, mach_port_t *serviceport, bool pid_local); -static void machservice_ignore(job_t j, struct machservice *ms); -static void machservice_watch(job_t j, struct machservice *ms); -static void machservice_delete(job_t j, struct machservice *, bool port_died); -static void machservice_request_notifications(struct machservice *); -static mach_port_t machservice_port(struct machservice *); -static job_t machservice_job(struct machservice *); -static bool machservice_hidden(struct machservice *); -static bool machservice_active(struct machservice *); -static const char *machservice_name(struct machservice *); -static bootstrap_status_t machservice_status(struct machservice *); -void machservice_drain_port(struct machservice *); - -struct socketgroup { - SLIST_ENTRY(socketgroup) sle; - int *fds; - unsigned int junkfds:1, fd_cnt:31; - union { - const char name[0]; - char name_init[0]; - }; -}; - -static bool socketgroup_new(job_t j, const char *name, int *fds, size_t fd_cnt, bool junkfds); -static void socketgroup_delete(job_t j, struct socketgroup *sg); -static void socketgroup_watch(job_t j, struct socketgroup *sg); -static void socketgroup_ignore(job_t j, struct socketgroup *sg); -static void socketgroup_callback(job_t j); -static void socketgroup_setup(launch_data_t obj, const char *key, void *context); -static void socketgroup_kevent_mod(job_t j, struct socketgroup *sg, bool do_add); - -struct calendarinterval { - LIST_ENTRY(calendarinterval) global_sle; - SLIST_ENTRY(calendarinterval) sle; - job_t job; - struct tm when; - time_t when_next; -}; - -static LIST_HEAD(, calendarinterval) sorted_calendar_events; - -static bool calendarinterval_new(job_t j, struct tm *w); -static bool calendarinterval_new_from_obj(job_t j, launch_data_t obj); -static void calendarinterval_new_from_obj_dict_walk(launch_data_t obj, const char *key, void *context); -static void calendarinterval_delete(job_t j, struct calendarinterval *ci); -static void calendarinterval_setalarm(job_t j, struct calendarinterval *ci); -static void calendarinterval_callback(void); -static void calendarinterval_sanity_check(void); - -struct envitem { - SLIST_ENTRY(envitem) sle; - bool one_shot; - char *value; - union { - const char key[0]; - char key_init[0]; - }; -}; - -static bool envitem_new(job_t j, const char *k, const char *v, bool global, bool one_shot); -static void envitem_delete(job_t j, struct envitem *ei, bool global); -static void envitem_setup(launch_data_t obj, const char *key, void *context); -static void envitem_setup_one_shot(launch_data_t obj, const char *key, void *context); - -struct limititem { - SLIST_ENTRY(limititem) sle; - struct rlimit lim; - unsigned int setsoft:1, sethard:1, which:30; -}; - -static bool limititem_update(job_t j, int w, rlim_t r); -static void limititem_delete(job_t j, struct limititem *li); -static void limititem_setup(launch_data_t obj, const char *key, void *context); -#if HAVE_SANDBOX -static void seatbelt_setup_flags(launch_data_t obj, const char *key, void *context); -#endif - -static void jetsam_property_setup(launch_data_t obj, const char *key, job_t j); - -typedef enum { - NETWORK_UP = 1, - NETWORK_DOWN, - SUCCESSFUL_EXIT, - FAILED_EXIT, - PATH_EXISTS, - PATH_MISSING, - OTHER_JOB_ENABLED, - OTHER_JOB_DISABLED, - OTHER_JOB_ACTIVE, - OTHER_JOB_INACTIVE, - PATH_CHANGES, - DIR_NOT_EMPTY, - // FILESYSTEMTYPE_IS_MOUNTED, /* for nfsiod, but maybe others */ -} semaphore_reason_t; - -struct semaphoreitem { - SLIST_ENTRY(semaphoreitem) sle; - semaphore_reason_t why; - bool watching_parent; - int fd; - union { - const char what[0]; - char what_init[0]; - }; -}; - -struct semaphoreitem_dict_iter_context { - job_t j; - semaphore_reason_t why_true; - semaphore_reason_t why_false; -}; - -static bool semaphoreitem_new(job_t j, semaphore_reason_t why, const char *what); -static void semaphoreitem_delete(job_t j, struct semaphoreitem *si); -static void semaphoreitem_setup(launch_data_t obj, const char *key, void *context); -static void semaphoreitem_setup_dict_iter(launch_data_t obj, const char *key, void *context); -static void semaphoreitem_callback(job_t j, struct kevent *kev); -static void semaphoreitem_watch(job_t j, struct semaphoreitem *si); -static void semaphoreitem_ignore(job_t j, struct semaphoreitem *si); -static void semaphoreitem_runtime_mod_ref(struct semaphoreitem *si, bool add); - -#define ACTIVE_JOB_HASH_SIZE 32 -#define ACTIVE_JOB_HASH(x) (IS_POWER_OF_TWO(ACTIVE_JOB_HASH_SIZE) ? (x & (ACTIVE_JOB_HASH_SIZE - 1)) : (x % ACTIVE_JOB_HASH_SIZE)) - -#define MACHSERVICE_HASH_SIZE 37 - -enum { - JOBMGR_PHASE_HOPEFULLY_EXITS_FIRST, - JOBMGR_PHASE_NORMAL, - JOBMGR_PHASE_HOPEFULLY_EXITS_LAST, - JOBMGR_PHASE_LAST, -}; - -static char *s_phases[JOBMGR_PHASE_LAST + 1] = { - "HopefullyExitsFirst", - "Normal", - "HopefullyExitsLast", - "Finalized", -}; - -struct jobmgr_s { - kq_callback kqjobmgr_callback; - SLIST_ENTRY(jobmgr_s) sle; - SLIST_HEAD(, jobmgr_s) submgrs; - LIST_HEAD(, job_s) jobs; - LIST_HEAD(, job_s) jetsam_jobs; - LIST_HEAD(, job_s) active_jobs[ACTIVE_JOB_HASH_SIZE]; - LIST_HEAD(, machservice) ms_hash[MACHSERVICE_HASH_SIZE]; - LIST_HEAD(, job_s) global_env_jobs; - STAILQ_HEAD(, job_s) pending_samples; - mach_port_t jm_port; - mach_port_t req_port; - mach_port_t init_audit_session; - jobmgr_t parentmgr; - int reboot_flags; - int shutdown_phase; - unsigned int global_on_demand_cnt; - unsigned int hopefully_first_cnt; - unsigned int normal_active_cnt; - unsigned int jetsam_jobs_cnt; - unsigned int shutting_down :1, - session_initialized :1, - killed_hopefully_first_jobs :1, - killed_normal_jobs :1, - killed_hopefully_last_jobs :1, - killed_stray_jobs :1; - char sample_log_file[PATH_MAX]; - uint32_t properties; - union { - const char name[0]; - char name_init[0]; - }; -}; - -#define jobmgr_assumes(jm, e) \ - (unlikely(!(e)) ? jobmgr_log_bug(jm, __LINE__), false : true) - -static jobmgr_t jobmgr_new(jobmgr_t jm, mach_port_t requestorport, mach_port_t transfer_port, bool sflag, const char *name, bool no_init, mach_port_t session_port); -static job_t jobmgr_import2(jobmgr_t jm, launch_data_t pload); -static jobmgr_t jobmgr_parent(jobmgr_t jm); -static jobmgr_t jobmgr_do_garbage_collection(jobmgr_t jm); -static bool jobmgr_label_test(jobmgr_t jm, const char *str); -static void jobmgr_reap_bulk(jobmgr_t jm, struct kevent *kev); -static void jobmgr_log_stray_children(jobmgr_t jm, bool kill_strays); -static void jobmgr_kill_stray_children(jobmgr_t jm, pid_t *p, size_t np); -static void jobmgr_remove(jobmgr_t jm); -static void jobmgr_dispatch_all(jobmgr_t jm, bool newmounthack); -static void jobmgr_dequeue_next_sample(jobmgr_t jm); -static job_t jobmgr_init_session(jobmgr_t jm, const char *session_type, bool sflag); -static job_t jobmgr_find_by_pid_deep(jobmgr_t jm, pid_t p, bool anon_okay); -static job_t jobmgr_find_by_pid(jobmgr_t jm, pid_t p, bool create_anon); -static jobmgr_t jobmgr_find_by_name(jobmgr_t jm, const char *where); -static job_t job_mig_intran2(jobmgr_t jm, mach_port_t mport, pid_t upid); -static job_t jobmgr_lookup_per_user_context_internal(job_t j, uid_t which_user, bool dispatch, mach_port_t *mp); -static void job_export_all2(jobmgr_t jm, launch_data_t where); -static void jobmgr_callback(void *obj, struct kevent *kev); -static void jobmgr_setup_env_from_other_jobs(jobmgr_t jm); -static void jobmgr_export_env_from_other_jobs(jobmgr_t jm, launch_data_t dict); -static struct machservice *jobmgr_lookup_service(jobmgr_t jm, const char *name, bool check_parent, pid_t target_pid); -static void jobmgr_logv(jobmgr_t jm, int pri, int err, const char *msg, va_list ap) __attribute__((format(printf, 4, 0))); -static void jobmgr_log(jobmgr_t jm, int pri, const char *msg, ...) __attribute__((format(printf, 3, 4))); -/* static void jobmgr_log_error(jobmgr_t jm, int pri, const char *msg, ...) __attribute__((format(printf, 3, 4))); */ -static void jobmgr_log_bug(jobmgr_t jm, unsigned int line); - -#define AUTO_PICK_LEGACY_LABEL (const char *)(~0) -#define AUTO_PICK_ANONYMOUS_LABEL (const char *)(~1) - -struct suspended_peruser { - LIST_ENTRY(suspended_peruser) sle; - job_t j; -}; - -struct job_s { - kq_callback kqjob_callback; /* MUST be first element of this structure for benefit of launchd's run loop. */ - LIST_ENTRY(job_s) sle; - LIST_ENTRY(job_s) needing_session_sle; - LIST_ENTRY(job_s) jetsam_sle; - LIST_ENTRY(job_s) pid_hash_sle; - LIST_ENTRY(job_s) label_hash_sle; - LIST_ENTRY(job_s) global_env_sle; - STAILQ_ENTRY(job_s) pending_samples_sle; - SLIST_ENTRY(job_s) curious_jobs_sle; - LIST_HEAD(, suspended_peruser) suspended_perusers; - LIST_HEAD(, waiting_for_exit) exit_watchers; - SLIST_HEAD(, socketgroup) sockets; - SLIST_HEAD(, calendarinterval) cal_intervals; - SLIST_HEAD(, envitem) global_env; - SLIST_HEAD(, envitem) env; - SLIST_HEAD(, limititem) limits; - SLIST_HEAD(, machservice) machservices; - SLIST_HEAD(, semaphoreitem) semaphores; - SLIST_HEAD(, waiting_for_removal) removal_watchers; - struct rusage ru; - cpu_type_t *j_binpref; - size_t j_binpref_cnt; - mach_port_t j_port; - mach_port_t wait_reply_port; /* we probably should switch to a list of waiters */ - uid_t mach_uid; - jobmgr_t mgr; - size_t argc; - char **argv; - char *prog; - char *rootdir; - char *workingdir; - char *username; - char *groupname; - char *stdinpath; - char *stdoutpath; - char *stderrpath; - char *alt_exc_handler; - struct vproc_shmem_s *shmem; - struct machservice *lastlookup; - unsigned int lastlookup_gennum; -#if HAVE_SANDBOX - char *seatbelt_profile; - uint64_t seatbelt_flags; -#endif -#if HAVE_QUARANTINE - void *quarantine_data; - size_t quarantine_data_sz; -#endif - pid_t p; - int last_exit_status; - int stdin_fd; - int fork_fd; - int log_redirect_fd; - int nice; - int stdout_err_fd; - int32_t jetsam_priority; - int32_t jetsam_memlimit; - int32_t main_thread_priority; - uint32_t timeout; - uint32_t exit_timeout; - uint64_t sent_signal_time; - uint64_t start_time; - uint32_t min_run_time; - uint32_t start_interval; - uint32_t peruser_suspend_count; /* The number of jobs that have disabled this per-user launchd. */ -#if 0 - /* someday ... */ - enum { - J_TYPE_ANONYMOUS = 1, - J_TYPE_LANCHSERVICES, - J_TYPE_MACHINIT, - J_TYPE_INETD, - } j_type; -#endif - bool debug :1, /* man launchd.plist --> Debug */ - ondemand :1, /* man launchd.plist --> KeepAlive == false */ - session_create :1, /* man launchd.plist --> SessionCreate */ - low_pri_io :1, /* man launchd.plist --> LowPriorityIO */ - no_init_groups :1, /* man launchd.plist --> InitGroups */ - priv_port_has_senders :1, /* a legacy mach_init concept to make bootstrap_create_server/service() work */ - importing_global_env :1, /* a hack during job importing */ - importing_hard_limits :1, /* a hack during job importing */ - setmask :1, /* man launchd.plist --> Umask */ - anonymous :1, /* a process that launchd knows about, but isn't managed by launchd */ - checkedin :1, /* a legacy mach_init concept to detect sick jobs */ - legacy_mach_job :1, /* a job created via bootstrap_create_server() */ - legacy_LS_job :1, /* a job created via spawn_via_launchd() */ - inetcompat :1, /* a legacy job that wants inetd compatible semantics */ - inetcompat_wait :1, /* a twist on inetd compatibility */ - start_pending :1, /* an event fired and the job should start, but not necessarily right away */ - globargv :1, /* man launchd.plist --> EnableGlobbing */ - wait4debugger :1, /* man launchd.plist --> WaitForDebugger */ - wait4debugger_oneshot :1, /* One-shot WaitForDebugger. */ - internal_exc_handler :1, /* MachExceptionHandler == true */ - stall_before_exec :1, /* a hack to support an option of spawn_via_launchd() */ - only_once :1, /* man launchd.plist --> LaunchOnlyOnce. Note: 5465184 Rename this to "HopefullyNeverExits" */ - currently_ignored :1, /* Make job_ignore() / job_watch() work. If these calls were balanced, then this wouldn't be necessarily. */ - forced_peers_to_demand_mode :1, /* A job that forced all other jobs to be temporarily launch-on-demand */ - setnice :1, /* man launchd.plist --> Nice */ - hopefully_exits_last :1, /* man launchd.plist --> HopefullyExitsLast */ - removal_pending :1, /* a job was asked to be unloaded/removed while running, we'll remove it after it exits */ - sent_sigkill :1, /* job_kill() was called */ - sampling_complete :1, /* job_force_sampletool() was called (or is disabled) */ - debug_before_kill :1, /* enter the kernel debugger before killing a job */ - weird_bootstrap :1, /* a hack that launchd+launchctl use during jobmgr_t creation */ - start_on_mount :1, /* man launchd.plist --> StartOnMount */ - per_user :1, /* This job is a per-user launchd managed by the PID 1 launchd */ - hopefully_exits_first :1, /* man launchd.plist --> HopefullyExitsFirst */ - deny_unknown_mslookups :1, /* A flag for changing the behavior of bootstrap_look_up() */ - unload_at_mig_return :1, /* A job thoroughly confused launchd. We need to unload it ASAP */ - abandon_pg :1, /* man launchd.plist --> AbandonProcessGroup */ - ignore_pg_at_shutdown :1, /* During shutdown, do not send SIGTERM to stray processes in the process group of this job. */ - poll_for_vfs_changes :1, /* a hack to work around the fact that kqueues don't work on all filesystems */ - deny_job_creation :1, /* Don't let this job create new 'job_t' objects in launchd */ - kill_via_shmem :1, /* man launchd.plist --> EnableTransactions */ - sent_kill_via_shmem :1, /* We need to 'kill_via_shmem' once-and-only-once */ - clean_kill :1, /* The job was sent SIGKILL because it was clean. */ - pending_sample :1, /* This job needs to be sampled for some reason. */ - kill_after_sample :1, /* The job is to be killed after sampling. */ - is_being_sampled :1, /* We've spawned a sample tool to sample the job. */ - reap_after_trace :1, /* The job exited before sample did, so we should reap it after sample is done. */ - nosy :1, /* The job has an OtherJobEnabled KeepAlive criterion. */ - crashed :1, /* The job is the default Mach exception handler, and it crashed. */ - reaped :1, /* We've received NOTE_EXIT for the job. */ - stopped :1, /* job_stop() was called. */ - jetsam_frontmost :1, /* The job is considered "frontmost" by Jetsam. */ - needs_kickoff :1, /* The job is to be kept alive continuously, but it must be initially kicked off. */ - is_bootstrapper :1, /* The job is a bootstrapper. */ - has_console :1, /* The job owns the console. */ - clean_exit_timer_expired :1, /* The job was clean, received SIGKILL and failed to exit after LAUNCHD_CLEAN_KILL_TIMER seconds. */ - embedded_special_privileges :1, /* The job runs as a non-root user on embedded but has select privileges of the root user. */ - did_exec :1, /* The job exec(2)ed successfully. */ - holds_ref :1, /* The (anonymous) job called vprocmgr_switch_to_session(). */ - jetsam_properties :1; /* The job has Jetsam limits in place. */ - mode_t mask; - pid_t tracing_pid; - mach_port_t audit_session; - uuid_t expected_audit_uuid; - const char label[0]; -}; - -#define LABEL_HASH_SIZE 53 - -static LIST_HEAD(, job_s) label_hash[LABEL_HASH_SIZE]; -static size_t hash_label(const char *label) __attribute__((pure)); -static size_t hash_ms(const char *msstr) __attribute__((pure)); -static SLIST_HEAD(, job_s) s_curious_jobs; - -#define job_assumes(j, e) \ - (unlikely(!(e)) ? job_log_bug(j, __LINE__), false : true) - -static void job_import_keys(launch_data_t obj, const char *key, void *context); -static void job_import_bool(job_t j, const char *key, bool value); -static void job_import_string(job_t j, const char *key, const char *value); -static void job_import_integer(job_t j, const char *key, long long value); -static void job_import_dictionary(job_t j, const char *key, launch_data_t value); -static void job_import_array(job_t j, const char *key, launch_data_t value); -static void job_import_opaque(job_t j, const char *key, launch_data_t value); -static bool job_set_global_on_demand(job_t j, bool val); -static const char *job_active(job_t j); -static void job_watch(job_t j); -static void job_ignore(job_t j); -static void job_cleanup_after_tracer(job_t j); -static void job_reap(job_t j); -static bool job_useless(job_t j); -static bool job_keepalive(job_t j); -static void job_dispatch_curious_jobs(job_t j); -static void job_start(job_t j); -static void job_start_child(job_t j) __attribute__((noreturn)); -static void job_setup_attributes(job_t j); -static bool job_setup_machport(job_t j); -static void job_setup_fd(job_t j, int target_fd, const char *path, int flags); -static void job_postfork_become_user(job_t j); -static void job_postfork_test_user(job_t j); -static void job_log_pids_with_weird_uids(job_t j); -static void job_setup_exception_port(job_t j, task_t target_task); -static void job_callback(void *obj, struct kevent *kev); -static void job_callback_proc(job_t j, struct kevent *kev); -static void job_callback_timer(job_t j, void *ident); -static void job_callback_read(job_t j, int ident); -static void job_log_stray_pg(job_t j); -static void job_log_children_without_exec(job_t j); -static job_t job_new_anonymous(jobmgr_t jm, pid_t anonpid) __attribute__((malloc, nonnull, warn_unused_result)); -static job_t job_new(jobmgr_t jm, const char *label, const char *prog, const char *const *argv) __attribute__((malloc, nonnull(1,2), warn_unused_result)); -static job_t job_new_via_mach_init(job_t j, const char *cmd, uid_t uid, bool ond) __attribute__((malloc, nonnull, warn_unused_result)); -static void job_kill(job_t j); -static void job_uncork_fork(job_t j); -static void job_log_stdouterr(job_t j); -static void job_logv(job_t j, int pri, int err, const char *msg, va_list ap) __attribute__((format(printf, 4, 0))); -static void job_log_error(job_t j, int pri, const char *msg, ...) __attribute__((format(printf, 3, 4))); -static void job_log_bug(job_t j, unsigned int line); -static void job_log_stdouterr2(job_t j, const char *msg, ...); -static void job_set_exception_port(job_t j, mach_port_t port); -static kern_return_t job_handle_mpm_wait(job_t j, mach_port_t srp, int *waitstatus); - -static const struct { - const char *key; - int val; -} launchd_keys2limits[] = { - { LAUNCH_JOBKEY_RESOURCELIMIT_CORE, RLIMIT_CORE }, - { LAUNCH_JOBKEY_RESOURCELIMIT_CPU, RLIMIT_CPU }, - { LAUNCH_JOBKEY_RESOURCELIMIT_DATA, RLIMIT_DATA }, - { LAUNCH_JOBKEY_RESOURCELIMIT_FSIZE, RLIMIT_FSIZE }, - { LAUNCH_JOBKEY_RESOURCELIMIT_MEMLOCK, RLIMIT_MEMLOCK }, - { LAUNCH_JOBKEY_RESOURCELIMIT_NOFILE, RLIMIT_NOFILE }, - { LAUNCH_JOBKEY_RESOURCELIMIT_NPROC, RLIMIT_NPROC }, - { LAUNCH_JOBKEY_RESOURCELIMIT_RSS, RLIMIT_RSS }, - { LAUNCH_JOBKEY_RESOURCELIMIT_STACK, RLIMIT_STACK }, -}; - -static time_t cronemu(int mon, int mday, int hour, int min); -static time_t cronemu_wday(int wday, int hour, int min); -static bool cronemu_mon(struct tm *wtm, int mon, int mday, int hour, int min); -static bool cronemu_mday(struct tm *wtm, int mday, int hour, int min); -static bool cronemu_hour(struct tm *wtm, int hour, int min); -static bool cronemu_min(struct tm *wtm, int min); - -/* miscellaneous file local functions */ -static size_t get_kern_max_proc(void); -static int dir_has_files(job_t j, const char *path); -static char **mach_cmd2argv(const char *string); -static size_t our_strhash(const char *s) __attribute__((pure)); -static void extract_rcsid_substr(const char *i, char *o, size_t osz); -static void simulate_pid1_crash(void); -static pid_t basic_spawn(job_t j, void (*what_to_do)(job_t)); -static void take_sample(job_t j); - -void eliminate_double_reboot(void); - -/* file local globals */ -static size_t total_children; -static size_t total_anon_children; -static mach_port_t the_exception_server; -static job_t workaround_5477111; -static LIST_HEAD(, job_s) s_needing_sessions; -mach_port_t g_audit_session_port = MACH_PORT_NULL; - -#if !TARGET_OS_EMBEDDED -static job_t s_embedded_privileged_job = (job_t)&root_jobmgr; -au_asid_t g_audit_session = AU_DEFAUDITSID; -#else -static job_t s_embedded_privileged_job = NULL; -pid_t g_audit_session = 0; -#endif - -static int s_no_hang_fd = -1; - -/* process wide globals */ -mach_port_t inherited_bootstrap_port; -jobmgr_t root_jobmgr; -bool g_shutdown_debugging = false; -bool g_verbose_boot = false; -bool g_embedded_privileged_action = false; -bool g_runtime_busy_time = false; - -void -job_ignore(job_t j) -{ - struct semaphoreitem *si; - struct socketgroup *sg; - struct machservice *ms; - - if (j->currently_ignored) { - return; - } - - job_log(j, LOG_DEBUG, "Ignoring..."); - - j->currently_ignored = true; - - if (j->poll_for_vfs_changes) { - j->poll_for_vfs_changes = false; - job_assumes(j, kevent_mod((uintptr_t)&j->semaphores, EVFILT_TIMER, EV_DELETE, 0, 0, j) != -1); - } - - SLIST_FOREACH(sg, &j->sockets, sle) { - socketgroup_ignore(j, sg); - } - - SLIST_FOREACH(ms, &j->machservices, sle) { - machservice_ignore(j, ms); - } - - SLIST_FOREACH(si, &j->semaphores, sle) { - semaphoreitem_ignore(j, si); - } -} - -void -job_watch(job_t j) -{ - struct semaphoreitem *si; - struct socketgroup *sg; - struct machservice *ms; - - if (!j->currently_ignored) { - return; - } - - job_log(j, LOG_DEBUG, "Watching..."); - - j->currently_ignored = false; - - SLIST_FOREACH(sg, &j->sockets, sle) { - socketgroup_watch(j, sg); - } - - SLIST_FOREACH(ms, &j->machservices, sle) { - machservice_watch(j, ms); - } - - SLIST_FOREACH(si, &j->semaphores, sle) { - semaphoreitem_watch(j, si); - } -} - -void -job_stop(job_t j) -{ - char extralog[100]; - int32_t newval = 1; - - if (unlikely(!j->p || j->anonymous)) { - return; - } - -#if !TARGET_OS_EMBEDDED - if (j->kill_via_shmem && !g_force_old_kill_path) { - if (j->shmem) { - if (!j->sent_kill_via_shmem) { - j->shmem->vp_shmem_flags |= VPROC_SHMEM_EXITING; - newval = __sync_sub_and_fetch(&j->shmem->vp_shmem_transaction_cnt, 1); - j->sent_kill_via_shmem = true; - } else { - newval = j->shmem->vp_shmem_transaction_cnt; - } - } else { - newval = -1; - } - } else if( j->kill_via_shmem ) { - job_log(j, LOG_DEBUG, "Stopping transactional job the old-fashioned way."); - } -#endif - -#if TARGET_OS_EMBEDDED - if( g_embedded_privileged_action && s_embedded_privileged_job ) { - if( !job_assumes(j, s_embedded_privileged_job->username != NULL && j->username != NULL) ) { - errno = EPERM; - return; - } - - if( strcmp(j->username, s_embedded_privileged_job->username) != 0 ) { - errno = EPERM; - return; - } - } else if( g_embedded_privileged_action ) { - errno = EINVAL; - return; - } -#endif - - j->sent_signal_time = runtime_get_opaque_time(); - - if (newval < 0) { - j->clean_kill = true; - job_kill(j); - } else { - /* - * If sampling is enabled and SAMPLE_TIMEOUT is earlier than the job exit_timeout, - * then set a timer for SAMPLE_TIMEOUT seconds after killing - */ - unsigned int exit_timeout = j->exit_timeout; - bool do_sample = do_apple_internal_logging; - unsigned int timeout = exit_timeout; - - if (do_sample && (!exit_timeout || (LAUNCHD_SAMPLE_TIMEOUT < exit_timeout))) { - timeout = LAUNCHD_SAMPLE_TIMEOUT; - } - - job_assumes(j, runtime_kill(j->p, SIGTERM) != -1); - - if (timeout) { - j->sampling_complete = !do_sample; - job_assumes(j, kevent_mod((uintptr_t)&j->exit_timeout, EVFILT_TIMER, - EV_ADD|EV_ONESHOT, NOTE_SECONDS, timeout, j) != -1); - } - - if (!exit_timeout) { - job_log(j, LOG_DEBUG, "This job has an infinite exit timeout"); - } - - if (j->kill_via_shmem) { - snprintf(extralog, sizeof(extralog), ": %d remaining transactions", newval + 1); - } else { - extralog[0] = '\0'; - } - - job_log(j, LOG_DEBUG, "Sent SIGTERM signal%s", extralog); - } - - j->stopped = true; -} - -launch_data_t -job_export(job_t j) -{ - launch_data_t tmp, tmp2, tmp3, r = launch_data_alloc(LAUNCH_DATA_DICTIONARY); - - if (r == NULL) { - return NULL; - } - - if ((tmp = launch_data_new_string(j->label))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_LABEL); - } - if ((tmp = launch_data_new_string(j->mgr->name))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_LIMITLOADTOSESSIONTYPE); - } - if ((tmp = launch_data_new_bool(j->ondemand))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_ONDEMAND); - } - if ((tmp = launch_data_new_integer(j->last_exit_status))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_LASTEXITSTATUS); - } - if (j->p && (tmp = launch_data_new_integer(j->p))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_PID); - } - if ((tmp = launch_data_new_integer(j->timeout))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_TIMEOUT); - } - if (j->prog && (tmp = launch_data_new_string(j->prog))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_PROGRAM); - } - if (j->stdinpath && (tmp = launch_data_new_string(j->stdinpath))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_STANDARDINPATH); - } - if (j->stdoutpath && (tmp = launch_data_new_string(j->stdoutpath))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_STANDARDOUTPATH); - } - if (j->stderrpath && (tmp = launch_data_new_string(j->stderrpath))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_STANDARDERRORPATH); - } - if (likely(j->argv) && (tmp = launch_data_alloc(LAUNCH_DATA_ARRAY))) { - size_t i; - - for (i = 0; i < j->argc; i++) { - if ((tmp2 = launch_data_new_string(j->argv[i]))) { - launch_data_array_set_index(tmp, tmp2, i); - } - } - - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_PROGRAMARGUMENTS); - } - - if (j->kill_via_shmem && (tmp = launch_data_new_bool(true))) { - int32_t tmp_cnt = -1; - - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_ENABLETRANSACTIONS); - - if (j->shmem) { - tmp_cnt = j->shmem->vp_shmem_transaction_cnt; - } - - if (j->sent_kill_via_shmem) { - tmp_cnt++; - } - - if ((tmp = launch_data_new_integer(tmp_cnt))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_TRANSACTIONCOUNT); - } - } - - if (j->session_create && (tmp = launch_data_new_bool(true))) { - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_SESSIONCREATE); - } - - if (j->inetcompat && (tmp = launch_data_alloc(LAUNCH_DATA_DICTIONARY))) { - if ((tmp2 = launch_data_new_bool(j->inetcompat_wait))) { - launch_data_dict_insert(tmp, tmp2, LAUNCH_JOBINETDCOMPATIBILITY_WAIT); - } - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_INETDCOMPATIBILITY); - } - - if (!SLIST_EMPTY(&j->sockets) && (tmp = launch_data_alloc(LAUNCH_DATA_DICTIONARY))) { - struct socketgroup *sg; - int i; - - SLIST_FOREACH(sg, &j->sockets, sle) { - if (sg->junkfds) { - continue; - } - if ((tmp2 = launch_data_alloc(LAUNCH_DATA_ARRAY))) { - for (i = 0; i < sg->fd_cnt; i++) { - if ((tmp3 = launch_data_new_fd(sg->fds[i]))) { - launch_data_array_set_index(tmp2, tmp3, i); - } - } - launch_data_dict_insert(tmp, tmp2, sg->name); - } - } - - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_SOCKETS); - } - - if (!SLIST_EMPTY(&j->machservices) && (tmp = launch_data_alloc(LAUNCH_DATA_DICTIONARY))) { - struct machservice *ms; - - tmp3 = NULL; - - SLIST_FOREACH(ms, &j->machservices, sle) { - if (ms->per_pid) { - if (tmp3 == NULL) { - tmp3 = launch_data_alloc(LAUNCH_DATA_DICTIONARY); - } - if (tmp3) { - tmp2 = launch_data_new_machport(MACH_PORT_NULL); - launch_data_dict_insert(tmp3, tmp2, ms->name); - } - } else { - tmp2 = launch_data_new_machport(MACH_PORT_NULL); - launch_data_dict_insert(tmp, tmp2, ms->name); - } - } - - launch_data_dict_insert(r, tmp, LAUNCH_JOBKEY_MACHSERVICES); - - if (tmp3) { - launch_data_dict_insert(r, tmp3, LAUNCH_JOBKEY_PERJOBMACHSERVICES); - } - } - - return r; -} - -static void -jobmgr_log_active_jobs(jobmgr_t jm) -{ - const char *why_active; - jobmgr_t jmi; - job_t ji; - - SLIST_FOREACH(jmi, &jm->submgrs, sle) { - jobmgr_log_active_jobs(jmi); - } - - LIST_FOREACH(ji, &jm->jobs, sle) { - if( (why_active = job_active(ji)) ) { - job_log(ji, LOG_DEBUG | LOG_CONSOLE, "%s", why_active); - } - } -} - -static void -jobmgr_still_alive_with_check(jobmgr_t jm) -{ - jobmgr_log(jm, LOG_DEBUG | LOG_CONSOLE, "Still alive with %lu/%lu (normal/anonymous) children. In %s phase of shutdown.", total_children, total_anon_children, s_phases[jm->shutdown_phase]); - jobmgr_log_active_jobs(jm); -} - -jobmgr_t -jobmgr_shutdown(jobmgr_t jm) -{ - jobmgr_t jmi, jmn; - jobmgr_log(jm, LOG_DEBUG, "Beginning job manager shutdown with flags: %s", reboot_flags_to_C_names(jm->reboot_flags)); - - jm->shutting_down = true; - - SLIST_FOREACH_SAFE(jmi, &jm->submgrs, sle, jmn) { - jobmgr_shutdown(jmi); - } - - if (jm->parentmgr == NULL && pid1_magic) { - jobmgr_assumes(jm, kevent_mod((uintptr_t)jm, EVFILT_TIMER, EV_ADD, NOTE_SECONDS, 5, jm)); - #if !TARGET_OS_EMBEDDED - /* Kill the update thread. */ - jobmgr_assumes(jm, __sync_sub_and_fetch(&g_sync_frequency, 30) == 0); - #endif - } - - return jobmgr_do_garbage_collection(jm); -} - -void -jobmgr_remove(jobmgr_t jm) -{ - jobmgr_t jmi; - job_t ji; - - jobmgr_log(jm, LOG_DEBUG, "Removing job manager."); - if (!jobmgr_assumes(jm, SLIST_EMPTY(&jm->submgrs))) { - while ((jmi = SLIST_FIRST(&jm->submgrs))) { - jobmgr_remove(jmi); - } - } - - while( (ji = LIST_FIRST(&jm->jobs)) ) { - if( !ji->anonymous && ji->p ) { - job_log(ji, LOG_WARNING | LOG_CONSOLE, "Job has overstayed its welcome. Forcing removal."); - ji->p = 0; - } - job_remove(ji); - } - - if (jm->req_port) { - jobmgr_assumes(jm, launchd_mport_deallocate(jm->req_port) == KERN_SUCCESS); - } - - if (jm->jm_port) { - jobmgr_assumes(jm, launchd_mport_close_recv(jm->jm_port) == KERN_SUCCESS); - } - - if (jm->parentmgr) { - runtime_del_weak_ref(); - SLIST_REMOVE(&jm->parentmgr->submgrs, jm, jobmgr_s, sle); - } else if (pid1_magic) { - eliminate_double_reboot(); - launchd_log_vm_stats(); - jobmgr_log(root_jobmgr, LOG_NOTICE | LOG_CONSOLE, "About to call: reboot(%s).", reboot_flags_to_C_names(jm->reboot_flags)); - runtime_closelog(); - jobmgr_assumes(jm, reboot(jm->reboot_flags) != -1); - } else { - jobmgr_log(jm, LOG_DEBUG, "About to exit"); - runtime_closelog(); - exit(EXIT_SUCCESS); - } - - free(jm); -} - -void -job_remove(job_t j) -{ - struct waiting_for_removal *w4r; - struct calendarinterval *ci; - struct semaphoreitem *si; - struct socketgroup *sg; - struct machservice *ms; - struct limititem *li; - struct envitem *ei; - -#if TARGET_OS_EMBEDDED - if( g_embedded_privileged_action && s_embedded_privileged_job ) { - if( !job_assumes(j, s_embedded_privileged_job->username != NULL && j->username != NULL) ) { - errno = EPERM; - return; - } - - if( strcmp(j->username, s_embedded_privileged_job->username) != 0 ) { - errno = EPERM; - return; - } - } else if( g_embedded_privileged_action ) { - errno = EINVAL; - return; - } -#endif - - if (unlikely(j->p)) { - if (j->anonymous) { - job_reap(j); - } else { - job_log(j, LOG_DEBUG, "Removal pended until the job exits"); - - if (!j->removal_pending) { - j->removal_pending = true; - job_stop(j); - } - return; - } - } - - job_dispatch_curious_jobs(j); - - ipc_close_all_with_job(j); - - job_log(j, LOG_INFO, "Total rusage: utime %ld.%06u stime %ld.%06u maxrss %lu ixrss %lu idrss %lu isrss %lu minflt %lu majflt %lu nswap %lu inblock %lu oublock %lu msgsnd %lu msgrcv %lu nsignals %lu nvcsw %lu nivcsw %lu", - j->ru.ru_utime.tv_sec, j->ru.ru_utime.tv_usec, - j->ru.ru_stime.tv_sec, j->ru.ru_stime.tv_usec, - j->ru.ru_maxrss, j->ru.ru_ixrss, j->ru.ru_idrss, j->ru.ru_isrss, - j->ru.ru_minflt, j->ru.ru_majflt, - j->ru.ru_nswap, j->ru.ru_inblock, j->ru.ru_oublock, - j->ru.ru_msgsnd, j->ru.ru_msgrcv, - j->ru.ru_nsignals, j->ru.ru_nvcsw, j->ru.ru_nivcsw); - - if (j->forced_peers_to_demand_mode) { - job_set_global_on_demand(j, false); - } - - if (!job_assumes(j, j->fork_fd == 0)) { - job_assumes(j, runtime_close(j->fork_fd) != -1); - } - - if (j->stdin_fd) { - job_assumes(j, runtime_close(j->stdin_fd) != -1); - } - - if (!job_assumes(j, j->log_redirect_fd == 0)) { - job_assumes(j, runtime_close(j->log_redirect_fd) != -1); - } - - if (j->j_port) { - job_assumes(j, launchd_mport_close_recv(j->j_port) == KERN_SUCCESS); - } - - if (!job_assumes(j, j->wait_reply_port == MACH_PORT_NULL)) { - job_assumes(j, launchd_mport_deallocate(j->wait_reply_port) == KERN_SUCCESS); - } - - while ((sg = SLIST_FIRST(&j->sockets))) { - socketgroup_delete(j, sg); - } - while ((ci = SLIST_FIRST(&j->cal_intervals))) { - calendarinterval_delete(j, ci); - } - while ((ei = SLIST_FIRST(&j->env))) { - envitem_delete(j, ei, false); - } - while ((ei = SLIST_FIRST(&j->global_env))) { - envitem_delete(j, ei, true); - } - while ((li = SLIST_FIRST(&j->limits))) { - limititem_delete(j, li); - } - while ((ms = SLIST_FIRST(&j->machservices))) { - machservice_delete(j, ms, false); - } - while ((si = SLIST_FIRST(&j->semaphores))) { - semaphoreitem_delete(j, si); - } - while ((w4r = SLIST_FIRST(&j->removal_watchers))) { - waiting4removal_delete(j, w4r); - } - - if (j->prog) { - free(j->prog); - } - if (j->argv) { - free(j->argv); - } - if (j->rootdir) { - free(j->rootdir); - } - if (j->workingdir) { - free(j->workingdir); - } - if (j->username) { - free(j->username); - } - if (j->groupname) { - free(j->groupname); - } - if (j->stdinpath) { - free(j->stdinpath); - } - if (j->stdoutpath) { - free(j->stdoutpath); - } - if (j->stderrpath) { - free(j->stderrpath); - } - if (j->alt_exc_handler) { - free(j->alt_exc_handler); - } -#if HAVE_SANDBOX - if (j->seatbelt_profile) { - free(j->seatbelt_profile); - } -#endif -#if HAVE_QUARANTINE - if (j->quarantine_data) { - free(j->quarantine_data); - } -#endif - if (j->j_binpref) { - free(j->j_binpref); - } - if (j->start_interval) { - runtime_del_weak_ref(); - job_assumes(j, kevent_mod((uintptr_t)&j->start_interval, EVFILT_TIMER, EV_DELETE, 0, 0, NULL) != -1); - } - if (j->poll_for_vfs_changes) { - job_assumes(j, kevent_mod((uintptr_t)&j->semaphores, EVFILT_TIMER, EV_DELETE, 0, 0, j) != -1); - } - if( j->exit_timeout ) { - /* Not a big deal if this fails. It means that the timer's already been freed. */ - kevent_mod((uintptr_t)&j->exit_timeout, EVFILT_TIMER, EV_DELETE, 0, 0, NULL); - } - if( j->jetsam_properties ) { - LIST_REMOVE(j, jetsam_sle); - j->mgr->jetsam_jobs_cnt--; - } - if( j->audit_session != MACH_PORT_NULL ) { - job_assumes(j, mach_port_deallocate(mach_task_self(), j->audit_session) == KERN_SUCCESS); - } - if( !uuid_is_null(j->expected_audit_uuid) ) { - LIST_REMOVE(j, needing_session_sle); - } - if( j->embedded_special_privileges ) { - s_embedded_privileged_job = NULL; - } - - kevent_mod((uintptr_t)j, EVFILT_TIMER, EV_DELETE, 0, 0, NULL); - - LIST_REMOVE(j, sle); - LIST_REMOVE(j, label_hash_sle); - - job_log(j, LOG_DEBUG, "Removed"); - - free(j); -} - -void -socketgroup_setup(launch_data_t obj, const char *key, void *context) -{ - launch_data_t tmp_oai; - job_t j = context; - size_t i, fd_cnt = 1; - int *fds; - - if (launch_data_get_type(obj) == LAUNCH_DATA_ARRAY) { - fd_cnt = launch_data_array_get_count(obj); - } - - fds = alloca(fd_cnt * sizeof(int)); - - for (i = 0; i < fd_cnt; i++) { - if (launch_data_get_type(obj) == LAUNCH_DATA_ARRAY) { - tmp_oai = launch_data_array_get_index(obj, i); - } else { - tmp_oai = obj; - } - - fds[i] = launch_data_get_fd(tmp_oai); - } - - socketgroup_new(j, key, fds, fd_cnt, strcmp(key, LAUNCH_JOBKEY_BONJOURFDS) == 0); - - ipc_revoke_fds(obj); -} - -bool -job_set_global_on_demand(job_t j, bool val) -{ - if (j->forced_peers_to_demand_mode && val) { - return false; - } else if (!j->forced_peers_to_demand_mode && !val) { - return false; - } - - if ((j->forced_peers_to_demand_mode = val)) { - j->mgr->global_on_demand_cnt++; - } else { - j->mgr->global_on_demand_cnt--; - } - - if (j->mgr->global_on_demand_cnt == 0) { - jobmgr_dispatch_all(j->mgr, false); - } - - return true; -} - -bool -job_setup_machport(job_t j) -{ - mach_msg_size_t mxmsgsz; - - if (!job_assumes(j, launchd_mport_create_recv(&j->j_port) == KERN_SUCCESS)) { - goto out_bad; - } - - /* Sigh... at the moment, MIG has maxsize == sizeof(reply union) */ - mxmsgsz = (typeof(mxmsgsz)) sizeof(union __RequestUnion__job_mig_protocol_vproc_subsystem); - if (job_mig_protocol_vproc_subsystem.maxsize > mxmsgsz) { - mxmsgsz = job_mig_protocol_vproc_subsystem.maxsize; - } - - if (!job_assumes(j, runtime_add_mport(j->j_port, protocol_vproc_server, mxmsgsz) == KERN_SUCCESS)) { - goto out_bad2; - } - - if (!job_assumes(j, launchd_mport_notify_req(j->j_port, MACH_NOTIFY_NO_SENDERS) == KERN_SUCCESS)) { - job_assumes(j, launchd_mport_close_recv(j->j_port) == KERN_SUCCESS); - goto out_bad; - } - - return true; -out_bad2: - job_assumes(j, launchd_mport_close_recv(j->j_port) == KERN_SUCCESS); -out_bad: - return false; -} - -job_t -job_new_via_mach_init(job_t j, const char *cmd, uid_t uid, bool ond) -{ - const char **argv = (const char **)mach_cmd2argv(cmd); - job_t jr = NULL; - - if (!job_assumes(j, argv != NULL)) { - goto out_bad; - } - - jr = job_new(j->mgr, AUTO_PICK_LEGACY_LABEL, NULL, argv); - - free(argv); - - /* jobs can easily be denied creation during shutdown */ - if (unlikely(jr == NULL)) { - goto out_bad; - } - - jr->mach_uid = uid; - jr->ondemand = ond; - jr->legacy_mach_job = true; - jr->abandon_pg = true; - jr->priv_port_has_senders = true; /* the IPC that called us will make-send on this port */ - - if (!job_setup_machport(jr)) { - goto out_bad; - } - - job_log(jr, LOG_INFO, "Legacy%s server created", ond ? " on-demand" : ""); - - return jr; - -out_bad: - if (jr) { - job_remove(jr); - } - return NULL; -} - -kern_return_t -job_handle_mpm_wait(job_t j, mach_port_t srp, int *waitstatus) -{ - if (j->p) { - j->wait_reply_port = srp; - return MIG_NO_REPLY; - } - - *waitstatus = j->last_exit_status; - - return 0; -} - -job_t -job_new_anonymous(jobmgr_t jm, pid_t anonpid) -{ - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, anonpid }; - struct kinfo_proc kp; - size_t len = sizeof(kp); - bool shutdown_state; - job_t jp = NULL, jr = NULL; - uid_t kp_euid, kp_uid, kp_svuid; - gid_t kp_egid, kp_gid, kp_svgid; - - if (!jobmgr_assumes(jm, anonpid != 0)) { - errno = EINVAL; - return NULL; - } - - if (!jobmgr_assumes(jm, anonpid < 100000)) { - /* The kernel current defines PID_MAX to be 99999, but that define isn't exported */ - errno = EINVAL; - return NULL; - } - - if (!jobmgr_assumes(jm, sysctl(mib, 4, &kp, &len, NULL, 0) != -1)) { - return NULL; - } - - if (unlikely(len != sizeof(kp))) { - jobmgr_log(jm, LOG_DEBUG, "Tried to create an anonymous job for nonexistent PID: %u", anonpid); - errno = ESRCH; - return NULL; - } - - if (!jobmgr_assumes(jm, kp.kp_proc.p_comm[0] != '\0')) { - errno = EINVAL; - return NULL; - } - - if (unlikely(kp.kp_proc.p_stat == SZOMB)) { - jobmgr_log(jm, LOG_DEBUG, "Tried to create an anonymous job for zombie PID %u: %s", anonpid, kp.kp_proc.p_comm); - } - - if (unlikely(kp.kp_proc.p_flag & P_SUGID)) { - jobmgr_log(jm, LOG_DEBUG, "Inconsistency: P_SUGID is set on PID %u: %s", anonpid, kp.kp_proc.p_comm); - } - - kp_euid = kp.kp_eproc.e_ucred.cr_uid; - kp_uid = kp.kp_eproc.e_pcred.p_ruid; - kp_svuid = kp.kp_eproc.e_pcred.p_svuid; - kp_egid = kp.kp_eproc.e_ucred.cr_gid; - kp_gid = kp.kp_eproc.e_pcred.p_rgid; - kp_svgid = kp.kp_eproc.e_pcred.p_svgid; - - if (unlikely(kp_euid != kp_uid || kp_euid != kp_svuid || kp_uid != kp_svuid || kp_egid != kp_gid || kp_egid != kp_svgid || kp_gid != kp_svgid)) { - jobmgr_log(jm, LOG_DEBUG, "Inconsistency: Mixed credentials (e/r/s UID %u/%u/%u GID %u/%u/%u) detected on PID %u: %s", - kp_euid, kp_uid, kp_svuid, kp_egid, kp_gid, kp_svgid, anonpid, kp.kp_proc.p_comm); - } - - /* "Fix" for a problem that shouldn't even exist. - * See rdar://problem/7264615 for the symptom and rdar://problem/5020256 - * as to why this can happen. - */ - if( !jobmgr_assumes(jm, kp.kp_eproc.e_ppid != anonpid) ) { - jobmgr_log(jm, LOG_WARNING, "Process has become its own parent through ptrace(3). It should find a different way to do whatever it's doing. Setting PPID to 0: %s", kp.kp_proc.p_comm); - errno = EINVAL; - return NULL; - } - - if (jp && !jp->anonymous && unlikely(!(kp.kp_proc.p_flag & P_EXEC))) { - job_log(jp, LOG_DEBUG, "Called *fork(). Please switch to posix_spawn*(), pthreads or launchd. Child PID %u", - kp.kp_proc.p_pid); - } - - /* A total hack: Normally, job_new() returns an error during shutdown, but anonymous jobs are special. */ - if (unlikely(shutdown_state = jm->shutting_down)) { - jm->shutting_down = false; - } - - if (jobmgr_assumes(jm, (jr = job_new(jm, AUTO_PICK_ANONYMOUS_LABEL, kp.kp_proc.p_comm, NULL)) != NULL)) { - u_int proc_fflags = NOTE_EXEC|NOTE_FORK|NOTE_EXIT; - - total_anon_children++; - jr->anonymous = true; - jr->p = anonpid; - - /* anonymous process reaping is messy */ - LIST_INSERT_HEAD(&jm->active_jobs[ACTIVE_JOB_HASH(jr->p)], jr, pid_hash_sle); - - if (unlikely(kevent_mod(jr->p, EVFILT_PROC, EV_ADD, proc_fflags, 0, root_jobmgr) == -1) && job_assumes(jr, errno == ESRCH)) { - /* zombies are weird */ - job_log(jr, LOG_ERR, "Failed to add kevent for PID %u. Will unload at MIG return", jr->p); - jr->unload_at_mig_return = true; - } - - if (unlikely(shutdown_state && jm->hopefully_first_cnt == 0)) { - job_log(jr, LOG_SCOLDING, "This process showed up to the party while all the guests were leaving. Odds are that it will have a miserable time."); - } - - job_log(jr, LOG_DEBUG, "Created PID %u anonymously by PPID %u%s%s", anonpid, kp.kp_eproc.e_ppid, jp ? ": " : "", jp ? jp->label : ""); - } - - if (unlikely(shutdown_state)) { - jm->shutting_down = true; - } - - /* This is down here to mitigate the effects of rdar://problem/7264615, in which a process - * attaches to its own parent. We need to make sure that the anonymous job has been added - * to the process list so that, if it's used ptrace(3) to cause a cycle in the process - * tree (thereby making it not a tree anymore), we'll find the tracing parent PID of the - * parent process, which is the child, when we go looking for it in jobmgr_find_by_pid(). - */ - switch (kp.kp_eproc.e_ppid) { - case 0: - /* the kernel */ - break; - case 1: - if (!pid1_magic) { - /* we cannot possibly find a parent job_t that is useful in this function */ - break; - } - /* fall through */ - default: - jp = jobmgr_find_by_pid(jm, kp.kp_eproc.e_ppid, true); - jobmgr_assumes(jm, jp != NULL); - break; - } - - return jr; -} - -job_t -job_new(jobmgr_t jm, const char *label, const char *prog, const char *const *argv) -{ - const char *const *argv_tmp = argv; - char tmp_path[PATH_MAX]; - char auto_label[1000]; - const char *bn = NULL; - char *co; - size_t minlabel_len; - size_t i, cc = 0; - job_t j; - - launchd_assert(offsetof(struct job_s, kqjob_callback) == 0); - - if (unlikely(jm->shutting_down)) { - errno = EINVAL; - return NULL; - } - - if (unlikely(prog == NULL && argv == NULL)) { - errno = EINVAL; - return NULL; - } - - char *anon_or_legacy = ( label == AUTO_PICK_ANONYMOUS_LABEL ) ? "anonymous" : "mach_init"; - if (unlikely(label == AUTO_PICK_LEGACY_LABEL || label == AUTO_PICK_ANONYMOUS_LABEL)) { - if (prog) { - bn = prog; - } else { - strlcpy(tmp_path, argv[0], sizeof(tmp_path)); - bn = basename(tmp_path); /* prog for auto labels is kp.kp_kproc.p_comm */ - } - snprintf(auto_label, sizeof(auto_label), "%s.%s.%s", sizeof(void *) == 8 ? "0xdeadbeeffeedface" : "0xbabecafe", anon_or_legacy, bn); - label = auto_label; - /* This is so we can do gross things later. See NOTE_EXEC for anonymous jobs */ - minlabel_len = strlen(label) + MAXCOMLEN; - } else { - minlabel_len = strlen(label); - } - - j = calloc(1, sizeof(struct job_s) + minlabel_len + 1); - - if (!jobmgr_assumes(jm, j != NULL)) { - return NULL; - } - - if (unlikely(label == auto_label)) { - snprintf((char *)j->label, strlen(label) + 1, "%p.%s.%s", j, anon_or_legacy, bn); - } else { - strcpy((char *)j->label, label); - } - j->kqjob_callback = job_callback; - j->mgr = jm; - j->min_run_time = LAUNCHD_MIN_JOB_RUN_TIME; - j->timeout = RUNTIME_ADVISABLE_IDLE_TIMEOUT; - j->exit_timeout = LAUNCHD_DEFAULT_EXIT_TIMEOUT; - j->currently_ignored = true; - j->ondemand = true; - j->checkedin = true; - j->jetsam_priority = -1; - j->jetsam_memlimit = -1; - uuid_clear(j->expected_audit_uuid); - - if (prog) { - j->prog = strdup(prog); - if (!job_assumes(j, j->prog != NULL)) { - goto out_bad; - } - } - - if (likely(argv)) { - while (*argv_tmp++) { - j->argc++; - } - - for (i = 0; i < j->argc; i++) { - cc += strlen(argv[i]) + 1; - } - - j->argv = malloc((j->argc + 1) * sizeof(char *) + cc); - - if (!job_assumes(j, j->argv != NULL)) { - goto out_bad; - } - - co = ((char *)j->argv) + ((j->argc + 1) * sizeof(char *)); - - for (i = 0; i < j->argc; i++) { - j->argv[i] = co; - strcpy(co, argv[i]); - co += strlen(argv[i]) + 1; - } - j->argv[i] = NULL; - } - - if( strcmp(j->label, "com.apple.WindowServer") == 0 ) { - j->has_console = true; - } - - LIST_INSERT_HEAD(&jm->jobs, j, sle); - LIST_INSERT_HEAD(&label_hash[hash_label(j->label)], j, label_hash_sle); - uuid_clear(j->expected_audit_uuid); - - job_log(j, LOG_DEBUG, "Conceived"); - - return j; - -out_bad: - if (j->prog) { - free(j->prog); - } - free(j); - - return NULL; -} - -job_t -job_import(launch_data_t pload) -{ - job_t j = jobmgr_import2(root_jobmgr, pload); - - if (unlikely(j == NULL)) { - return NULL; - } - - /* Since jobs are effectively stalled until they get security sessions assigned - * to them, we may wish to reconsider this behavior of calling the job "enabled" - * as far as other jobs with the OtherJobEnabled KeepAlive criterion set. - */ - job_dispatch_curious_jobs(j); - return job_dispatch(j, false); -} - -launch_data_t -job_import_bulk(launch_data_t pload) -{ - launch_data_t resp = launch_data_alloc(LAUNCH_DATA_ARRAY); - job_t *ja; - size_t i, c = launch_data_array_get_count(pload); - - ja = alloca(c * sizeof(job_t)); - - for (i = 0; i < c; i++) { - if( (likely(ja[i] = jobmgr_import2(root_jobmgr, launch_data_array_get_index(pload, i)))) && errno != ENEEDAUTH ) { - errno = 0; - } - launch_data_array_set_index(resp, launch_data_new_errno(errno), i); - } - - for (i = 0; i < c; i++) { - if (likely(ja[i])) { - job_dispatch_curious_jobs(ja[i]); - job_dispatch(ja[i], false); - } - } - - return resp; -} - -void -job_import_bool(job_t j, const char *key, bool value) -{ - bool found_key = false; - - switch (key[0]) { - case 'a': - case 'A': - if (strcasecmp(key, LAUNCH_JOBKEY_ABANDONPROCESSGROUP) == 0) { - j->abandon_pg = value; - found_key = true; - } - break; - case 'k': - case 'K': - if (strcasecmp(key, LAUNCH_JOBKEY_KEEPALIVE) == 0) { - j->ondemand = !value; - found_key = true; - } - break; - case 'o': - case 'O': - if (strcasecmp(key, LAUNCH_JOBKEY_ONDEMAND) == 0) { - j->ondemand = value; - found_key = true; - } - break; - case 'd': - case 'D': - if (strcasecmp(key, LAUNCH_JOBKEY_DEBUG) == 0) { - j->debug = value; - found_key = true; - } else if (strcasecmp(key, LAUNCH_JOBKEY_DISABLED) == 0) { - job_assumes(j, !value); - found_key = true; - } - break; - case 'h': - case 'H': - if (strcasecmp(key, LAUNCH_JOBKEY_HOPEFULLYEXITSLAST) == 0) { - j->hopefully_exits_last = value; - found_key = true; - } else if (strcasecmp(key, LAUNCH_JOBKEY_HOPEFULLYEXITSFIRST) == 0) { - j->hopefully_exits_first = value; - found_key = true; - } - break; - case 's': - case 'S': - if (strcasecmp(key, LAUNCH_JOBKEY_SESSIONCREATE) == 0) { - j->session_create = value; - found_key = true; - } else if (strcasecmp(key, LAUNCH_JOBKEY_STARTONMOUNT) == 0) { - j->start_on_mount = value; - found_key = true; - } else if (strcasecmp(key, LAUNCH_JOBKEY_SERVICEIPC) == 0) { - /* this only does something on Mac OS X 10.4 "Tiger" */ - found_key = true; - } - break; - case 'l': - case 'L': - if (strcasecmp(key, LAUNCH_JOBKEY_LOWPRIORITYIO) == 0) { - j->low_pri_io = value; - found_key = true; - } else if (strcasecmp(key, LAUNCH_JOBKEY_LAUNCHONLYONCE) == 0) { - j->only_once = value; - found_key = true; - } - break; - case 'm': - case 'M': - if (strcasecmp(key, LAUNCH_JOBKEY_MACHEXCEPTIONHANDLER) == 0) { - j->internal_exc_handler = value; - found_key = true; - } - break; - case 'i': - case 'I': - if (strcasecmp(key, LAUNCH_JOBKEY_INITGROUPS) == 0) { - if (getuid() != 0) { - job_log(j, LOG_WARNING, "Ignored this key: %s", key); - return; - } - j->no_init_groups = !value; - found_key = true; - } else if( strcasecmp(key, LAUNCH_JOBKEY_IGNOREPROCESSGROUPATSHUTDOWN) == 0 ) { - j->ignore_pg_at_shutdown = value; - found_key = true; - } - break; - case 'r': - case 'R': - if (strcasecmp(key, LAUNCH_JOBKEY_RUNATLOAD) == 0) { - if (value) { - /* We don't want value == false to change j->start_pending */ - j->start_pending = true; - } - found_key = true; - } - break; - case 'e': - case 'E': - if (strcasecmp(key, LAUNCH_JOBKEY_ENABLEGLOBBING) == 0) { - j->globargv = value; - found_key = true; - } else if (strcasecmp(key, LAUNCH_JOBKEY_ENABLETRANSACTIONS) == 0) { - j->kill_via_shmem = value; - found_key = true; - } else if (strcasecmp(key, LAUNCH_JOBKEY_ENTERKERNELDEBUGGERBEFOREKILL) == 0) { - j->debug_before_kill = value; - found_key = true; - } else if( strcasecmp(key, LAUNCH_JOBKEY_EMBEDDEDPRIVILEGEDISPENSATION) == 0 ) { - if( !s_embedded_privileged_job ) { - j->embedded_special_privileges = value; - s_embedded_privileged_job = j; - } else { - job_log(j, LOG_ERR, "Job tried to claim %s after it has already been claimed.", key); - } - found_key = true; - } - break; - case 'w': - case 'W': - if (strcasecmp(key, LAUNCH_JOBKEY_WAITFORDEBUGGER) == 0) { - j->wait4debugger = value; - found_key = true; - } - break; - default: - break; - } - - if (unlikely(!found_key)) { - job_log(j, LOG_WARNING, "Unknown key for boolean: %s", key); - } -} - -void -job_import_string(job_t j, const char *key, const char *value) -{ - char **where2put = NULL; - - switch (key[0]) { - case 'm': - case 'M': - if (strcasecmp(key, LAUNCH_JOBKEY_MACHEXCEPTIONHANDLER) == 0) { - where2put = &j->alt_exc_handler; - } - break; - case 'p': - case 'P': - if (strcasecmp(key, LAUNCH_JOBKEY_PROGRAM) == 0) { - return; - } - break; - case 'l': - case 'L': - if (strcasecmp(key, LAUNCH_JOBKEY_LABEL) == 0) { - return; - } else if (strcasecmp(key, LAUNCH_JOBKEY_LIMITLOADTOHOSTS) == 0) { - return; - } else if (strcasecmp(key, LAUNCH_JOBKEY_LIMITLOADFROMHOSTS) == 0) { - return; - } else if (strcasecmp(key, LAUNCH_JOBKEY_LIMITLOADTOSESSIONTYPE) == 0) { - return; - } - break; - case 'r': - case 'R': - if (strcasecmp(key, LAUNCH_JOBKEY_ROOTDIRECTORY) == 0) { - if (getuid() != 0) { - job_log(j, LOG_WARNING, "Ignored this key: %s", key); - return; - } - where2put = &j->rootdir; - } - break; - case 'w': - case 'W': - if (strcasecmp(key, LAUNCH_JOBKEY_WORKINGDIRECTORY) == 0) { - where2put = &j->workingdir; - } - break; - case 'u': - case 'U': - if (strcasecmp(key, LAUNCH_JOBKEY_USERNAME) == 0) { - if (getuid() != 0) { - job_log(j, LOG_WARNING, "Ignored this key: %s", key); - return; - } else if (strcmp(value, "root") == 0) { - return; - } - where2put = &j->username; - } - break; - case 'g': - case 'G': - if (strcasecmp(key, LAUNCH_JOBKEY_GROUPNAME) == 0) { - if (getuid() != 0) { - job_log(j, LOG_WARNING, "Ignored this key: %s", key); - return; - } else if (strcmp(value, "wheel") == 0) { - return; - } - where2put = &j->groupname; - } - break; - case 's': - case 'S': - if (strcasecmp(key, LAUNCH_JOBKEY_STANDARDOUTPATH) == 0) { - where2put = &j->stdoutpath; - } else if (strcasecmp(key, LAUNCH_JOBKEY_STANDARDERRORPATH) == 0) { - where2put = &j->stderrpath; - } else if (strcasecmp(key, LAUNCH_JOBKEY_STANDARDINPATH) == 0) { - where2put = &j->stdinpath; - j->stdin_fd = _fd(open(value, O_RDONLY|O_CREAT|O_NOCTTY|O_NONBLOCK, DEFFILEMODE)); - if (job_assumes(j, j->stdin_fd != -1)) { - /* open() should not block, but regular IO by the job should */ - job_assumes(j, fcntl(j->stdin_fd, F_SETFL, 0) != -1); - /* XXX -- EV_CLEAR should make named pipes happy? */ - job_assumes(j, kevent_mod(j->stdin_fd, EVFILT_READ, EV_ADD|EV_CLEAR, 0, 0, j) != -1); - } else { - j->stdin_fd = 0; - } -#if HAVE_SANDBOX - } else if (strcasecmp(key, LAUNCH_JOBKEY_SANDBOXPROFILE) == 0) { - where2put = &j->seatbelt_profile; -#endif - } - break; - default: - job_log(j, LOG_WARNING, "Unknown key for string: %s", key); - break; - } - - if (likely(where2put)) { - job_assumes(j, (*where2put = strdup(value)) != NULL); - } else { - /* See rdar://problem/5496612. These two are okay. */ - if( strncmp(key, "SHAuthorizationRight", sizeof("SHAuthorizationRight")) != 0 && strncmp(key, "ServiceDescription", sizeof("ServiceDescription")) != 0 ) { - job_log(j, LOG_WARNING, "Unknown key: %s", key); - } - } -} - -void -job_import_integer(job_t j, const char *key, long long value) -{ - switch (key[0]) { - case 'e': - case 'E': - if (strcasecmp(key, LAUNCH_JOBKEY_EXITTIMEOUT) == 0) { - if (unlikely(value < 0)) { - job_log(j, LOG_WARNING, "%s less than zero. Ignoring.", LAUNCH_JOBKEY_EXITTIMEOUT); - } else if (unlikely(value > UINT32_MAX)) { - job_log(j, LOG_WARNING, "%s is too large. Ignoring.", LAUNCH_JOBKEY_EXITTIMEOUT); - } else { - j->exit_timeout = (typeof(j->exit_timeout)) value; - } - } else if( strcasecmp(key, LAUNCH_JOBKEY_EMBEDDEDMAINTHREADPRIORITY) == 0 ) { - j->main_thread_priority = value; - } - break; - case 'j': - case 'J': - if( strcasecmp(key, LAUNCH_JOBKEY_JETSAMPRIORITY) == 0 ) { - job_log(j, LOG_WARNING | LOG_CONSOLE, "Please change the JetsamPriority key to be in a dictionary named JetsamProperties."); - - launch_data_t pri = launch_data_new_integer(value); - if( job_assumes(j, pri != NULL) ) { - jetsam_property_setup(pri, LAUNCH_JOBKEY_JETSAMPRIORITY, j); - launch_data_free(pri); - } - } - case 'n': - case 'N': - if (strcasecmp(key, LAUNCH_JOBKEY_NICE) == 0) { - if (unlikely(value < PRIO_MIN)) { - job_log(j, LOG_WARNING, "%s less than %d. Ignoring.", LAUNCH_JOBKEY_NICE, PRIO_MIN); - } else if (unlikely(value > PRIO_MAX)) { - job_log(j, LOG_WARNING, "%s is greater than %d. Ignoring.", LAUNCH_JOBKEY_NICE, PRIO_MAX); - } else { - j->nice = (typeof(j->nice)) value; - j->setnice = true; - } - } - break; - case 't': - case 'T': - if (strcasecmp(key, LAUNCH_JOBKEY_TIMEOUT) == 0) { - if (unlikely(value < 0)) { - job_log(j, LOG_WARNING, "%s less than zero. Ignoring.", LAUNCH_JOBKEY_TIMEOUT); - } else if (unlikely(value > UINT32_MAX)) { - job_log(j, LOG_WARNING, "%s is too large. Ignoring.", LAUNCH_JOBKEY_TIMEOUT); - } else { - j->timeout = (typeof(j->timeout)) value; - } - } else if (strcasecmp(key, LAUNCH_JOBKEY_THROTTLEINTERVAL) == 0) { - if (value < 0) { - job_log(j, LOG_WARNING, "%s less than zero. Ignoring.", LAUNCH_JOBKEY_THROTTLEINTERVAL); - } else if (value > UINT32_MAX) { - job_log(j, LOG_WARNING, "%s is too large. Ignoring.", LAUNCH_JOBKEY_THROTTLEINTERVAL); - } else { - j->min_run_time = (typeof(j->min_run_time)) value; - } - } - break; - case 'u': - case 'U': - if (strcasecmp(key, LAUNCH_JOBKEY_UMASK) == 0) { - j->mask = value; - j->setmask = true; - } - break; - case 's': - case 'S': - if (strcasecmp(key, LAUNCH_JOBKEY_STARTINTERVAL) == 0) { - if (unlikely(value <= 0)) { - job_log(j, LOG_WARNING, "%s is not greater than zero. Ignoring.", LAUNCH_JOBKEY_STARTINTERVAL); - } else if (unlikely(value > UINT32_MAX)) { - job_log(j, LOG_WARNING, "%s is too large. Ignoring.", LAUNCH_JOBKEY_STARTINTERVAL); - } else { - runtime_add_weak_ref(); - j->start_interval = (typeof(j->start_interval)) value; - - job_assumes(j, kevent_mod((uintptr_t)&j->start_interval, EVFILT_TIMER, EV_ADD, NOTE_SECONDS, j->start_interval, j) != -1); - } -#if HAVE_SANDBOX - } else if (strcasecmp(key, LAUNCH_JOBKEY_SANDBOXFLAGS) == 0) { - j->seatbelt_flags = value; -#endif - } - - break; - default: - job_log(j, LOG_WARNING, "Unknown key for integer: %s", key); - break; - } -} - -void -job_import_opaque(job_t j __attribute__((unused)), - const char *key, launch_data_t value __attribute__((unused))) -{ - switch (key[0]) { - case 'q': - case 'Q': -#if HAVE_QUARANTINE - if (strcasecmp(key, LAUNCH_JOBKEY_QUARANTINEDATA) == 0) { - size_t tmpsz = launch_data_get_opaque_size(value); - - if (job_assumes(j, j->quarantine_data = malloc(tmpsz))) { - memcpy(j->quarantine_data, launch_data_get_opaque(value), tmpsz); - j->quarantine_data_sz = tmpsz; - } - } -#endif - case 's': - case 'S': - if( strcasecmp(key, LAUNCH_JOBKEY_SECURITYSESSIONUUID) == 0 ) { - size_t tmpsz = launch_data_get_opaque_size(value); - if( job_assumes(j, tmpsz == sizeof(uuid_t)) ) { - memcpy(j->expected_audit_uuid, launch_data_get_opaque(value), sizeof(uuid_t)); - } - } - break; - default: - break; - } -} - -static void -policy_setup(launch_data_t obj, const char *key, void *context) -{ - job_t j = context; - bool found_key = false; - - switch (key[0]) { - case 'd': - case 'D': - if (strcasecmp(key, LAUNCH_JOBPOLICY_DENYCREATINGOTHERJOBS) == 0) { - j->deny_job_creation = launch_data_get_bool(obj); - found_key = true; - } - break; - default: - break; - } - - if (unlikely(!found_key)) { - job_log(j, LOG_WARNING, "Unknown policy: %s", key); - } -} - -void -job_import_dictionary(job_t j, const char *key, launch_data_t value) -{ - launch_data_t tmp; - - switch (key[0]) { - case 'p': - case 'P': - if (strcasecmp(key, LAUNCH_JOBKEY_POLICIES) == 0) { - launch_data_dict_iterate(value, policy_setup, j); - } - break; - case 'k': - case 'K': - if (strcasecmp(key, LAUNCH_JOBKEY_KEEPALIVE) == 0) { - launch_data_dict_iterate(value, semaphoreitem_setup, j); - } - break; - case 'i': - case 'I': - if (strcasecmp(key, LAUNCH_JOBKEY_INETDCOMPATIBILITY) == 0) { - j->inetcompat = true; - j->abandon_pg = true; - if ((tmp = launch_data_dict_lookup(value, LAUNCH_JOBINETDCOMPATIBILITY_WAIT))) { - j->inetcompat_wait = launch_data_get_bool(tmp); - } - } - break; - case 'j': - case 'J': - if( strcasecmp(key, LAUNCH_JOBKEY_JETSAMPROPERTIES) == 0 ) { - launch_data_dict_iterate(value, (void (*)(launch_data_t, const char *, void *))jetsam_property_setup, j); - } - case 'e': - case 'E': - if (strcasecmp(key, LAUNCH_JOBKEY_ENVIRONMENTVARIABLES) == 0) { - launch_data_dict_iterate(value, envitem_setup, j); - } - break; - case 'u': - case 'U': - if (strcasecmp(key, LAUNCH_JOBKEY_USERENVIRONMENTVARIABLES) == 0) { - j->importing_global_env = true; - launch_data_dict_iterate(value, envitem_setup, j); - j->importing_global_env = false; - } - break; - case 's': - case 'S': - if (strcasecmp(key, LAUNCH_JOBKEY_SOCKETS) == 0) { - launch_data_dict_iterate(value, socketgroup_setup, j); - } else if (strcasecmp(key, LAUNCH_JOBKEY_STARTCALENDARINTERVAL) == 0) { - calendarinterval_new_from_obj(j, value); - } else if (strcasecmp(key, LAUNCH_JOBKEY_SOFTRESOURCELIMITS) == 0) { - launch_data_dict_iterate(value, limititem_setup, j); -#if HAVE_SANDBOX - } else if (strcasecmp(key, LAUNCH_JOBKEY_SANDBOXFLAGS) == 0) { - launch_data_dict_iterate(value, seatbelt_setup_flags, j); -#endif - } - break; - case 'h': - case 'H': - if (strcasecmp(key, LAUNCH_JOBKEY_HARDRESOURCELIMITS) == 0) { - j->importing_hard_limits = true; - launch_data_dict_iterate(value, limititem_setup, j); - j->importing_hard_limits = false; - } - break; - case 'm': - case 'M': - if (strcasecmp(key, LAUNCH_JOBKEY_MACHSERVICES) == 0) { - launch_data_dict_iterate(value, machservice_setup, j); - } - break; - default: - job_log(j, LOG_WARNING, "Unknown key for dictionary: %s", key); - break; - } -} - -void -job_import_array(job_t j, const char *key, launch_data_t value) -{ - size_t i, value_cnt = launch_data_array_get_count(value); - const char *str; - - switch (key[0]) { - case 'p': - case 'P': - if (strcasecmp(key, LAUNCH_JOBKEY_PROGRAMARGUMENTS) == 0) { - return; - } - break; - case 'l': - case 'L': - if (strcasecmp(key, LAUNCH_JOBKEY_LIMITLOADTOHOSTS) == 0) { - return; - } else if (strcasecmp(key, LAUNCH_JOBKEY_LIMITLOADFROMHOSTS) == 0) { - return; - } else if (strcasecmp(key, LAUNCH_JOBKEY_LIMITLOADTOSESSIONTYPE) == 0) { - job_log(j, LOG_NOTICE, "launchctl should have transformed the \"%s\" array to a string", LAUNCH_JOBKEY_LIMITLOADTOSESSIONTYPE); - return; - } - break; - case 'q': - case 'Q': - if (strcasecmp(key, LAUNCH_JOBKEY_QUEUEDIRECTORIES) == 0) { - for (i = 0; i < value_cnt; i++) { - str = launch_data_get_string(launch_data_array_get_index(value, i)); - if (job_assumes(j, str != NULL)) { - semaphoreitem_new(j, DIR_NOT_EMPTY, str); - } - } - - } - break; - case 'w': - case 'W': - if (strcasecmp(key, LAUNCH_JOBKEY_WATCHPATHS) == 0) { - for (i = 0; i < value_cnt; i++) { - str = launch_data_get_string(launch_data_array_get_index(value, i)); - if (job_assumes(j, str != NULL)) { - semaphoreitem_new(j, PATH_CHANGES, str); - } - } - } - break; - case 'b': - case 'B': - if (strcasecmp(key, LAUNCH_JOBKEY_BONJOURFDS) == 0) { - socketgroup_setup(value, LAUNCH_JOBKEY_BONJOURFDS, j); - } else if (strcasecmp(key, LAUNCH_JOBKEY_BINARYORDERPREFERENCE) == 0) { - if (job_assumes(j, j->j_binpref = malloc(value_cnt * sizeof(*j->j_binpref)))) { - j->j_binpref_cnt = value_cnt; - for (i = 0; i < value_cnt; i++) { - j->j_binpref[i] = (cpu_type_t) launch_data_get_integer(launch_data_array_get_index(value, i)); - } - } - } - break; - case 's': - case 'S': - if (strcasecmp(key, LAUNCH_JOBKEY_STARTCALENDARINTERVAL) == 0) { - for (i = 0; i < value_cnt; i++) { - calendarinterval_new_from_obj(j, launch_data_array_get_index(value, i)); - } - } - break; - default: - job_log(j, LOG_WARNING, "Unknown key for array: %s", key); - break; - } -} - -void -job_import_keys(launch_data_t obj, const char *key, void *context) -{ - job_t j = context; - launch_data_type_t kind; - - if (!launchd_assumes(obj != NULL)) { - return; - } - - kind = launch_data_get_type(obj); - - switch (kind) { - case LAUNCH_DATA_BOOL: - job_import_bool(j, key, launch_data_get_bool(obj)); - break; - case LAUNCH_DATA_STRING: - job_import_string(j, key, launch_data_get_string(obj)); - break; - case LAUNCH_DATA_INTEGER: - job_import_integer(j, key, launch_data_get_integer(obj)); - break; - case LAUNCH_DATA_DICTIONARY: - job_import_dictionary(j, key, obj); - break; - case LAUNCH_DATA_ARRAY: - job_import_array(j, key, obj); - break; - case LAUNCH_DATA_OPAQUE: - job_import_opaque(j, key, obj); - break; - default: - job_log(j, LOG_WARNING, "Unknown value type '%d' for key: %s", kind, key); - break; - } -} - -job_t -jobmgr_import2(jobmgr_t jm, launch_data_t pload) -{ - launch_data_t tmp, ldpa; - const char *label = NULL, *prog = NULL; - const char **argv = NULL; - job_t j; - - if (!jobmgr_assumes(jm, pload != NULL)) { - errno = EINVAL; - return NULL; - } - - if (unlikely(launch_data_get_type(pload) != LAUNCH_DATA_DICTIONARY)) { - errno = EINVAL; - return NULL; - } - - if (unlikely(!(tmp = launch_data_dict_lookup(pload, LAUNCH_JOBKEY_LABEL)))) { - errno = EINVAL; - return NULL; - } - - if (unlikely(launch_data_get_type(tmp) != LAUNCH_DATA_STRING)) { - errno = EINVAL; - return NULL; - } - - if (unlikely(!(label = launch_data_get_string(tmp)))) { - errno = EINVAL; - return NULL; - } - -#if TARGET_OS_EMBEDDED - if( unlikely(g_embedded_privileged_action && s_embedded_privileged_job) ) { - if( unlikely(!(tmp = launch_data_dict_lookup(pload, LAUNCH_JOBKEY_USERNAME))) ) { - errno = EPERM; - return NULL; - } - - const char *username = NULL; - if( likely(tmp && launch_data_get_type(tmp) == LAUNCH_DATA_STRING) ) { - username = launch_data_get_string(tmp); - } else { - errno = EPERM; - return NULL; - } - - if( !jobmgr_assumes(jm, s_embedded_privileged_job->username != NULL && username != NULL) ) { - errno = EPERM; - return NULL; - } - - if( unlikely(strcmp(s_embedded_privileged_job->username, username) != 0) ) { - errno = EPERM; - return NULL; - } - } else if( g_embedded_privileged_action ) { - errno = EINVAL; - return NULL; - } -#endif - - if ((tmp = launch_data_dict_lookup(pload, LAUNCH_JOBKEY_PROGRAM)) && - (launch_data_get_type(tmp) == LAUNCH_DATA_STRING)) { - prog = launch_data_get_string(tmp); - } - - if ((ldpa = launch_data_dict_lookup(pload, LAUNCH_JOBKEY_PROGRAMARGUMENTS))) { - size_t i, c; - - if (launch_data_get_type(ldpa) != LAUNCH_DATA_ARRAY) { - errno = EINVAL; - return NULL; - } - - c = launch_data_array_get_count(ldpa); - - argv = alloca((c + 1) * sizeof(char *)); - - for (i = 0; i < c; i++) { - tmp = launch_data_array_get_index(ldpa, i); - - if (launch_data_get_type(tmp) != LAUNCH_DATA_STRING) { - errno = EINVAL; - return NULL; - } - - argv[i] = launch_data_get_string(tmp); - } - - argv[i] = NULL; - } - - /* Hack to make sure the proper job manager is set the whole way through. */ - launch_data_t session = launch_data_dict_lookup(pload, LAUNCH_JOBKEY_LIMITLOADTOSESSIONTYPE); - if( session ) { - jm = jobmgr_find_by_name(jm, launch_data_get_string(session)) ?: jm; - } - - jobmgr_log(jm, LOG_DEBUG, "Importing %s.", label); - - if (unlikely((j = job_find(label)) != NULL)) { - errno = EEXIST; - return NULL; - } else if (unlikely(!jobmgr_label_test(jm, label))) { - errno = EINVAL; - return NULL; - } - - if (likely(j = job_new(jm, label, prog, argv))) { - launch_data_dict_iterate(pload, job_import_keys, j); - if( !uuid_is_null(j->expected_audit_uuid) ) { - uuid_string_t uuid_str; - uuid_unparse(j->expected_audit_uuid, uuid_str); - job_log(j, LOG_DEBUG, "Imported job. Waiting for session for UUID %s.", uuid_str); - LIST_INSERT_HEAD(&s_needing_sessions, j, needing_session_sle); - errno = ENEEDAUTH; - } else { - job_log(j, LOG_DEBUG, "No security session specified."); - j->audit_session = MACH_PORT_NULL; - } - } - - return j; -} - -bool -jobmgr_label_test(jobmgr_t jm, const char *str) -{ - char *endstr = NULL; - const char *ptr; - - if (str[0] == '\0') { - jobmgr_log(jm, LOG_ERR, "Empty job labels are not allowed"); - return false; - } - - for (ptr = str; *ptr; ptr++) { - if (iscntrl(*ptr)) { - jobmgr_log(jm, LOG_ERR, "ASCII control characters are not allowed in job labels. Index: %td Value: 0x%hhx", ptr - str, *ptr); - return false; - } - } - - strtoll(str, &endstr, 0); - - if (str != endstr) { - jobmgr_log(jm, LOG_ERR, "Job labels are not allowed to begin with numbers: %s", str); - return false; - } - - if ((strncasecmp(str, "com.apple.launchd", strlen("com.apple.launchd")) == 0) || - (strncasecmp(str, "com.apple.launchctl", strlen("com.apple.launchctl")) == 0)) { - jobmgr_log(jm, LOG_ERR, "Job labels are not allowed to use a reserved prefix: %s", str); - return false; - } - - return true; -} - -job_t -job_find(const char *label) -{ - job_t ji; - - LIST_FOREACH(ji, &label_hash[hash_label(label)], label_hash_sle) { - if (unlikely(ji->removal_pending || ji->mgr->shutting_down)) { - continue; /* 5351245 and 5488633 respectively */ - } - - if (strcmp(ji->label, label) == 0) { - return ji; - } - } - - errno = ESRCH; - return NULL; -} - -/* Should try and consolidate with job_mig_intran2() and jobmgr_find_by_pid(). */ -job_t -jobmgr_find_by_pid_deep(jobmgr_t jm, pid_t p, bool anon_okay) -{ - job_t ji = NULL; - LIST_FOREACH( ji, &jm->active_jobs[ACTIVE_JOB_HASH(p)], pid_hash_sle ) { - if (ji->p == p && (!ji->anonymous || (ji->anonymous && anon_okay)) ) { - return ji; - } - } - - jobmgr_t jmi = NULL; - SLIST_FOREACH( jmi, &jm->submgrs, sle ) { - if( (ji = jobmgr_find_by_pid_deep(jmi, p, anon_okay)) ) { - break; - } - } - - return ji; -} - -job_t -jobmgr_find_by_pid(jobmgr_t jm, pid_t p, bool create_anon) -{ - job_t ji; - - LIST_FOREACH(ji, &jm->active_jobs[ACTIVE_JOB_HASH(p)], pid_hash_sle) { - if (ji->p == p) { - return ji; - } - } - - return create_anon ? job_new_anonymous(jm, p) : NULL; -} - -job_t -job_mig_intran2(jobmgr_t jm, mach_port_t mport, pid_t upid) -{ - jobmgr_t jmi; - job_t ji; - - if (jm->jm_port == mport) { - return jobmgr_find_by_pid(jm, upid, true); - } - - SLIST_FOREACH(jmi, &jm->submgrs, sle) { - job_t jr; - - if ((jr = job_mig_intran2(jmi, mport, upid))) { - return jr; - } - } - - LIST_FOREACH(ji, &jm->jobs, sle) { - if (ji->j_port == mport) { - return ji; - } - } - - return NULL; -} - -job_t -job_mig_intran(mach_port_t p) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - job_t jr; - - jr = job_mig_intran2(root_jobmgr, p, ldc->pid); - - if (!jobmgr_assumes(root_jobmgr, jr != NULL)) { - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, 0 }; - struct kinfo_proc kp; - size_t len = sizeof(kp); - - mib[3] = ldc->pid; - - if (jobmgr_assumes(root_jobmgr, sysctl(mib, 4, &kp, &len, NULL, 0) != -1) - && jobmgr_assumes(root_jobmgr, len == sizeof(kp))) { - jobmgr_log(root_jobmgr, LOG_ERR, "%s() was confused by PID %u UID %u EUID %u Mach Port 0x%x: %s", __func__, ldc->pid, ldc->uid, ldc->euid, p, kp.kp_proc.p_comm); - } - } - - return jr; -} - -job_t -job_find_by_service_port(mach_port_t p) -{ - struct machservice *ms; - - LIST_FOREACH(ms, &port_hash[HASH_PORT(p)], port_hash_sle) { - if (ms->recv && (ms->port == p)) { - return ms->job; - } - } - - return NULL; -} - -void -job_mig_destructor(job_t j) -{ - /* - * 5477111 - * - * 'j' can be invalid at this point. We should fix this up after Leopard ships. - */ - - if (unlikely(j && (j != workaround_5477111) && j->unload_at_mig_return)) { - job_log(j, LOG_NOTICE, "Unloading PID %u at MIG return.", j->p); - job_remove(j); - } - - workaround_5477111 = NULL; - - calendarinterval_sanity_check(); -} - -void -job_export_all2(jobmgr_t jm, launch_data_t where) -{ - jobmgr_t jmi; - job_t ji; - - SLIST_FOREACH(jmi, &jm->submgrs, sle) { - job_export_all2(jmi, where); - } - - LIST_FOREACH(ji, &jm->jobs, sle) { - launch_data_t tmp; - - if (jobmgr_assumes(jm, (tmp = job_export(ji)) != NULL)) { - launch_data_dict_insert(where, tmp, ji->label); - } - } -} - -launch_data_t -job_export_all(void) -{ - launch_data_t resp = launch_data_alloc(LAUNCH_DATA_DICTIONARY); - - if (launchd_assumes(resp != NULL)) { - job_export_all2(root_jobmgr, resp); - } - - return resp; -} - -void -job_log_stray_pg(job_t j) -{ - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PGRP, j->p }; - size_t i, kp_cnt, len = sizeof(struct kinfo_proc) * get_kern_max_proc(); - struct kinfo_proc *kp; - - if (!do_apple_internal_logging) { - return; - } - - runtime_ktrace(RTKT_LAUNCHD_FINDING_STRAY_PG, j->p, 0, 0); - - if (!job_assumes(j, (kp = malloc(len)) != NULL)) { - return; - } - if (!job_assumes(j, sysctl(mib, 4, kp, &len, NULL, 0) != -1)) { - goto out; - } - - kp_cnt = len / sizeof(struct kinfo_proc); - - for (i = 0; i < kp_cnt; i++) { - pid_t p_i = kp[i].kp_proc.p_pid; - pid_t pp_i = kp[i].kp_eproc.e_ppid; - const char *z = (kp[i].kp_proc.p_stat == SZOMB) ? "zombie " : ""; - const char *n = kp[i].kp_proc.p_comm; - - if (p_i == j->p) { - continue; - } else if (!job_assumes(j, p_i != 0 && p_i != 1)) { - continue; - } - - job_log(j, LOG_WARNING, "Stray %sprocess with PGID equal to this dead job: PID %u PPID %u %s", z, p_i, pp_i, n); - } - -out: - free(kp); -} - -void -job_reap(job_t j) -{ - struct rusage ru; - int status; - - bool is_system_bootstrapper = j->is_bootstrapper && pid1_magic && !j->mgr->parentmgr; - - job_log(j, LOG_DEBUG, "Reaping"); - - if (j->shmem) { - job_assumes(j, vm_deallocate(mach_task_self(), (vm_address_t)j->shmem, getpagesize()) == 0); - j->shmem = NULL; - } - - if (unlikely(j->weird_bootstrap)) { - int64_t junk = 0; - job_mig_swap_integer(j, VPROC_GSK_WEIRD_BOOTSTRAP, 0, 0, &junk); - } - - if (j->log_redirect_fd && !j->legacy_LS_job) { - job_log_stdouterr(j); /* one last chance */ - - if (j->log_redirect_fd) { - job_assumes(j, runtime_close(j->log_redirect_fd) != -1); - j->log_redirect_fd = 0; - } - } - - if (j->fork_fd) { - job_assumes(j, runtime_close(j->fork_fd) != -1); - j->fork_fd = 0; - } - - if (j->anonymous) { - status = 0; - memset(&ru, 0, sizeof(ru)); - } else { - /* - * The job is dead. While the PID/PGID is still known to be - * valid, try to kill abandoned descendant processes. - */ - job_log_stray_pg(j); - if (!j->abandon_pg) { - if (unlikely(runtime_killpg(j->p, SIGTERM) == -1 && errno != ESRCH)) { -#ifdef __LP64__ - job_log(j, LOG_APPLEONLY, "Bug: 5487498"); -#else - job_assumes(j, false); -#endif - } - } - - /* - * 5020256 - * - * The current implementation of ptrace() causes the traced process to - * be abducted away from the true parent and adopted by the tracer. - * - * Once the tracing process relinquishes control, the kernel then - * restores the true parent/child relationship. - * - * Unfortunately, the wait*() family of APIs is unaware of the temporarily - * data structures changes, and they return an error if reality hasn't - * been restored by the time they are called. - */ - if (!job_assumes(j, wait4(j->p, &status, 0, &ru) != -1)) { - job_log(j, LOG_NOTICE, "Working around 5020256. Assuming the job crashed."); - - status = W_EXITCODE(0, SIGSEGV); - memset(&ru, 0, sizeof(ru)); - } - } - - if (j->exit_timeout) { - kevent_mod((uintptr_t)&j->exit_timeout, EVFILT_TIMER, EV_DELETE, 0, 0, NULL); - } - - LIST_REMOVE(j, pid_hash_sle); - - if (j->wait_reply_port) { - job_log(j, LOG_DEBUG, "MPM wait reply being sent"); - job_assumes(j, job_mig_wait_reply(j->wait_reply_port, 0, status) == 0); - j->wait_reply_port = MACH_PORT_NULL; - } - - if( j->pending_sample ) { - job_log(j, LOG_DEBUG | LOG_CONSOLE, "Job exited before we could sample it."); - STAILQ_REMOVE(&j->mgr->pending_samples, j, job_s, pending_samples_sle); - j->pending_sample = false; - } - - if (j->sent_signal_time) { - uint64_t td_sec, td_usec, td = runtime_get_nanoseconds_since(j->sent_signal_time); - - td_sec = td / NSEC_PER_SEC; - td_usec = (td % NSEC_PER_SEC) / NSEC_PER_USEC; - - job_log(j, LOG_DEBUG, "Exited %llu.%06llu seconds after the first signal was sent", td_sec, td_usec); - } - - timeradd(&ru.ru_utime, &j->ru.ru_utime, &j->ru.ru_utime); - timeradd(&ru.ru_stime, &j->ru.ru_stime, &j->ru.ru_stime); - j->ru.ru_maxrss += ru.ru_maxrss; - j->ru.ru_ixrss += ru.ru_ixrss; - j->ru.ru_idrss += ru.ru_idrss; - j->ru.ru_isrss += ru.ru_isrss; - j->ru.ru_minflt += ru.ru_minflt; - j->ru.ru_majflt += ru.ru_majflt; - j->ru.ru_nswap += ru.ru_nswap; - j->ru.ru_inblock += ru.ru_inblock; - j->ru.ru_oublock += ru.ru_oublock; - j->ru.ru_msgsnd += ru.ru_msgsnd; - j->ru.ru_msgrcv += ru.ru_msgrcv; - j->ru.ru_nsignals += ru.ru_nsignals; - j->ru.ru_nvcsw += ru.ru_nvcsw; - j->ru.ru_nivcsw += ru.ru_nivcsw; - - if (WIFEXITED(status) && WEXITSTATUS(status) != 0) { - job_log(j, LOG_WARNING, "Exited with exit code: %d", WEXITSTATUS(status)); - } - - if (WIFSIGNALED(status)) { - int s = WTERMSIG(status); - if ((SIGKILL == s || SIGTERM == s) && !j->stopped) { - job_log(j, LOG_NOTICE, "Exited: %s", strsignal(s)); - } else if( !j->stopped && !j->clean_kill ) { - switch( s ) { - /* Signals which indicate a crash. */ - case SIGILL : - case SIGABRT : - case SIGFPE : - case SIGBUS : - case SIGSEGV : - case SIGSYS : - /* If the kernel has posted NOTE_EXIT and the signal sent to the process was - * SIGTRAP, assume that it's a crash. - */ - case SIGTRAP : - j->crashed = true; - job_log(j, LOG_WARNING, "Job appears to have crashed: %s", strsignal(s)); - break; - default : - job_log(j, LOG_WARNING, "Exited abnormally: %s", strsignal(s)); - break; - } - - if( is_system_bootstrapper && j->crashed ) { - job_log(j, LOG_ERR | LOG_CONSOLE, "The %s bootstrapper has crashed: %s", j->mgr->name, strsignal(s)); - } - } - } - - j->reaped = true; - - struct machservice *msi = NULL; - if( j->crashed || !(j->did_exec || j->anonymous) ) { - SLIST_FOREACH( msi, &j->machservices, sle ) { - if( j->crashed && !msi->isActive && (msi->drain_one_on_crash || msi->drain_all_on_crash) ) { - machservice_drain_port(msi); - } - - if( !j->did_exec && msi->reset && job_assumes(j, !msi->isActive) ) { - machservice_resetport(j, msi); - } - } - } - - struct suspended_peruser *spi = NULL; - while( (spi = LIST_FIRST(&j->suspended_perusers)) ) { - job_log(j, LOG_ERR, "Job exited before resuming per-user launchd for UID %u. Will forcibly resume.", spi->j->mach_uid); - spi->j->peruser_suspend_count--; - if( spi->j->peruser_suspend_count == 0 ) { - job_dispatch(spi->j, false); - } - LIST_REMOVE(spi, sle); - free(spi); - } - - j->last_exit_status = status; - struct waiting_for_exit *w4e = NULL; - while( (w4e = LIST_FIRST(&j->exit_watchers)) ) { - waiting4exit_delete(j, w4e); - } - - if (j->anonymous) { - total_anon_children--; - if( j->holds_ref ) { - runtime_del_ref(); - } - } else { - runtime_del_ref(); - total_children--; - } - - if( j->has_console ) { - g_wsp = 0; - } - - if (j->hopefully_exits_first) { - j->mgr->hopefully_first_cnt--; - } else if (!j->anonymous && !j->hopefully_exits_last) { - j->mgr->normal_active_cnt--; - } - j->sent_signal_time = 0; - j->sent_sigkill = false; - j->clean_kill = false; - j->sampling_complete = false; - j->sent_kill_via_shmem = false; - j->lastlookup = NULL; - j->lastlookup_gennum = 0; - j->p = 0; - - /* - * We need to someday evaluate other jobs and find those who wish to track the - * active/inactive state of this job. The current job_dispatch() logic makes - * this messy, given that jobs can be deleted at dispatch. - */ -} - -void -jobmgr_dispatch_all(jobmgr_t jm, bool newmounthack) -{ - jobmgr_t jmi, jmn; - job_t ji, jn; - - if (jm->shutting_down) { - return; - } - - SLIST_FOREACH_SAFE(jmi, &jm->submgrs, sle, jmn) { - jobmgr_dispatch_all(jmi, newmounthack); - } - - LIST_FOREACH_SAFE(ji, &jm->jobs, sle, jn) { - if (newmounthack && ji->start_on_mount) { - ji->start_pending = true; - } - - job_dispatch(ji, false); - } -} - -pid_t -basic_spawn(job_t j, void (*what_to_do)(job_t)) -{ - pid_t p = 0; - thread_state_flavor_t f = 0; -#if defined (__ppc__) || defined(__ppc64__) - f = PPC_THREAD_STATE64; -#elif defined(__i386__) || defined(__x86_64__) - f = x86_THREAD_STATE; -#elif defined(__arm__) - f = ARM_THREAD_STATE; -#else - #error "unknown architecture" -#endif - - int execpair[2] = { 0, 0 }; - job_assumes(j, socketpair(AF_UNIX, SOCK_STREAM, 0, execpair) != -1); - - switch( (p = fork()) ) { - case 0 : - job_assumes(j, runtime_close(execpair[0]) != -1); - /* Wait for the parent to attach a kevent. */ - read(_fd(execpair[1]), &p, sizeof(p)); - what_to_do(j); - _exit(EXIT_FAILURE); - case -1 : - job_assumes(j, runtime_close(execpair[0]) != -1); - job_assumes(j, runtime_close(execpair[1]) != -1); - execpair[0] = -1; - execpair[1] = -1; - job_log(j, LOG_NOTICE | LOG_CONSOLE, "fork(2) failed: %d", errno); - break; - default : - job_assumes(j, runtime_close(execpair[1]) != -1); - execpair[1] = -1; - break; - } - - int r = -1; - if( p != -1 ) { - /* Let us know when sample is done. ONESHOT is implicit if we're just interested in NOTE_EXIT. */ - if( job_assumes(j, (r = kevent_mod(p, EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, j)) != -1) ) { - if( !job_assumes(j, write(execpair[0], &p, sizeof(p)) == sizeof(p)) ) { - job_assumes(j, kevent_mod(p, EVFILT_PROC, EV_DELETE, 0, 0, NULL) != -1); - job_assumes(j, runtime_kill(p, SIGKILL) != -1); - r = -1; - p = -1; - } - } else { - job_assumes(j, runtime_kill(p, SIGKILL) != -1); - } - - int status = 0; - if( r == -1 ) { - job_assumes(j, waitpid(p, &status, WNOHANG) != -1); - } - } - - if( execpair[0] != -1 ) { - job_assumes(j, runtime_close(execpair[0]) != -1); - } - - if( execpair[1] != -1 ) { - job_assumes(j, runtime_close(execpair[0]) != -1); - } - - return p; -} - -void -take_sample(job_t j) -{ - char pidstr[32]; - snprintf(pidstr, sizeof(pidstr), "%u", j->p); -#if !TARGET_OS_EMBEDDED - /* -nodsyms so sample doesn't try to use Spotlight to find dsym files after mds has gone away. */ - char *sample_args[] = { "/usr/bin/sample", pidstr, "1", "-unsupportedShowArch", "-mayDie", "-nodsyms", "-file", j->mgr->sample_log_file, NULL }; -#else - char *sample_args[] = { "/usr/bin/sample", pidstr, "1", "-unsupportedShowArch", "-mayDie", "-file", j->mgr->sample_log_file, NULL }; -#endif - - execve(sample_args[0], sample_args, environ); - _exit(EXIT_FAILURE); -} - -void -jobmgr_dequeue_next_sample(jobmgr_t jm) -{ - if( STAILQ_EMPTY(&jm->pending_samples) ) { - jobmgr_log(jm, LOG_DEBUG | LOG_CONSOLE, "Sample queue is empty."); - return; - } - - /* Dequeue the next in line. */ - job_t j = STAILQ_FIRST(&jm->pending_samples); - if( j->is_being_sampled ) { - job_log(j, LOG_DEBUG | LOG_CONSOLE, "Sampling is in progress. Not dequeuing next job."); - return; - } - - if( !job_assumes(j, !j->sampling_complete) ) { - return; - } - - if (!job_assumes(j, do_apple_internal_logging)) { - return; - } - - if (!job_assumes(j, mkdir(SHUTDOWN_LOG_DIR, S_IRWXU) != -1 || errno == EEXIST)) { - return; - } - - char pidstr[32]; - snprintf(pidstr, sizeof(pidstr), "%u", j->p); - snprintf(j->mgr->sample_log_file, sizeof(j->mgr->sample_log_file), SHUTDOWN_LOG_DIR "/%s-%u.sample.txt", j->label, j->p); - - if (job_assumes(j, unlink(jm->sample_log_file) != -1 || errno == ENOENT)) { - pid_t sp = basic_spawn(j, take_sample); - - if( sp == -1 ) { - job_log(j, LOG_ERR | LOG_CONSOLE, "Sampling for job failed!"); - STAILQ_REMOVE(&jm->pending_samples, j, job_s, pending_samples_sle); - j->sampling_complete = true; - jobmgr_dequeue_next_sample(jm); - } else { - j->tracing_pid = sp; - j->is_being_sampled = true; - job_log(j, LOG_DEBUG | LOG_CONSOLE, "Sampling job (sample PID: %i, file: %s).", sp, j->mgr->sample_log_file); - } - } else { - STAILQ_REMOVE(&jm->pending_samples, j, job_s, pending_samples_sle); - j->sampling_complete = true; - } - - j->pending_sample = false; -} - -void -job_dispatch_curious_jobs(job_t j) -{ - job_t ji = NULL, jt = NULL; - SLIST_FOREACH_SAFE( ji, &s_curious_jobs, curious_jobs_sle, jt ) { - struct semaphoreitem *si = NULL; - SLIST_FOREACH( si, &ji->semaphores, sle ) { - if( !(si->why == OTHER_JOB_ENABLED || si->why == OTHER_JOB_DISABLED) ) { - continue; - } - - if( strncmp(si->what, j->label, strlen(j->label)) == 0 ) { - job_log(ji, LOG_DEBUG, "Dispatching out of interest in \"%s\".", j->label); - - job_dispatch(ji, false); - /* ji could be removed here, so don't do anything with it or its semaphores - * after this point. - */ - break; - } - } - } -} - -job_t -job_dispatch(job_t j, bool kickstart) -{ - /* Don't dispatch a job if it has no audit session set. */ - if( !uuid_is_null(j->expected_audit_uuid) ) { - return NULL; - } - -#if TARGET_OS_EMBEDDED - if( g_embedded_privileged_action && s_embedded_privileged_job ) { - if( !job_assumes(j, s_embedded_privileged_job->username != NULL && j->username != NULL) ) { - errno = EPERM; - return NULL; - } - - if( strcmp(j->username, s_embedded_privileged_job->username) != 0 ) { - errno = EPERM; - return NULL; - } - } else if( g_embedded_privileged_action ) { - errno = EINVAL; - return NULL; - } -#endif - - /* - * The whole job removal logic needs to be consolidated. The fact that - * a job can be removed from just about anywhere makes it easy to have - * stale pointers left behind somewhere on the stack that might get - * used after the deallocation. In particular, during job iteration. - * - * This is a classic example. The act of dispatching a job may delete it. - */ - if (!job_active(j)) { - if (job_useless(j)) { - job_remove(j); - return NULL; - } - if( unlikely(j->per_user && j->peruser_suspend_count > 0) ) { - return NULL; - } - - if (kickstart || job_keepalive(j)) { - job_log(j, LOG_DEBUG, "Starting job (kickstart = %s)", kickstart ? "true" : "false"); - job_start(j); - } else { - job_log(j, LOG_DEBUG, "Watching job (kickstart = %s)", kickstart ? "true" : "false"); - job_watch(j); - - /* - * 5455720 - * - * Path checking and monitoring is really racy right now. - * We should clean this up post Leopard. - */ - if (job_keepalive(j)) { - job_start(j); - } - } - } else { - job_log(j, LOG_DEBUG, "Tried to dispatch an already active job (%s).", job_active(j)); - } - - return j; -} - -void -job_log_stdouterr2(job_t j, const char *msg, ...) -{ - struct runtime_syslog_attr attr = { j->label, j->label, j->mgr->name, LOG_NOTICE, getuid(), j->p, j->p }; - va_list ap; - - va_start(ap, msg); - runtime_vsyslog(&attr, msg, ap); - va_end(ap); -} - -void -job_log_stdouterr(job_t j) -{ - char *msg, *bufindex, *buf = malloc(BIG_PIPE_SIZE + 1); - bool close_log_redir = false; - ssize_t rsz; - - if (!job_assumes(j, buf != NULL)) { - return; - } - - bufindex = buf; - - rsz = read(j->log_redirect_fd, buf, BIG_PIPE_SIZE); - - if (unlikely(rsz == 0)) { - job_log(j, LOG_DEBUG, "Standard out/error pipe closed"); - close_log_redir = true; - } else if (rsz == -1) { - if( !job_assumes(j, errno == EAGAIN) ) { - close_log_redir = true; - } - } else { - buf[rsz] = '\0'; - - while ((msg = strsep(&bufindex, "\n\r"))) { - if (msg[0]) { - job_log_stdouterr2(j, "%s", msg); - } - } - } - - free(buf); - - if (unlikely(close_log_redir)) { - job_assumes(j, runtime_close(j->log_redirect_fd) != -1); - j->log_redirect_fd = 0; - job_dispatch(j, false); - } -} - -void -job_kill(job_t j) -{ - if (unlikely(!j->p || j->anonymous)) { - return; - } - - job_assumes(j, runtime_kill(j->p, SIGKILL) != -1); - - j->sent_sigkill = true; - - intptr_t timer = j->clean_kill ? LAUNCHD_CLEAN_KILL_TIMER : LAUNCHD_SIGKILL_TIMER; - job_assumes(j, kevent_mod((uintptr_t)&j->exit_timeout, EVFILT_TIMER, EV_ADD, NOTE_SECONDS, timer, j) != -1); - - job_log(j, LOG_DEBUG, "Sent SIGKILL signal"); -} - -void -job_log_children_without_exec(job_t j) -{ - /* ER: Add a KERN_PROC_PPID sysctl */ -#ifdef KERN_PROC_PPID - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PPID, j->p }; -#else - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_ALL }; -#endif - size_t mib_sz = sizeof(mib) / sizeof(mib[0]); - size_t i, kp_cnt, len = sizeof(struct kinfo_proc) * get_kern_max_proc(); - struct kinfo_proc *kp; - - if (!do_apple_internal_logging || j->anonymous || j->per_user) { - return; - } - - if (!job_assumes(j, (kp = malloc(len)) != NULL)) { - return; - } - if (!job_assumes(j, sysctl(mib, (u_int) mib_sz, kp, &len, NULL, 0) != -1)) { - goto out; - } - - kp_cnt = len / sizeof(struct kinfo_proc); - - for (i = 0; i < kp_cnt; i++) { -#ifndef KERN_PROC_PPID - if (kp[i].kp_eproc.e_ppid != j->p) { - continue; - } -#endif - if (kp[i].kp_proc.p_flag & P_EXEC) { - continue; - } - - job_log(j, LOG_DEBUG, "Called *fork(). Please switch to posix_spawn*(), pthreads or launchd. Child PID %u", - kp[i].kp_proc.p_pid); - } - -out: - free(kp); -} - -void -job_cleanup_after_tracer(job_t j) -{ - jobmgr_t jm = NULL; - if( j->is_being_sampled ) { - int wstatus = 0; - job_log(j, LOG_DEBUG | LOG_CONSOLE, "sample[%i] finished with job.", j->tracing_pid); - if( job_assumes(j, waitpid(j->tracing_pid, &wstatus, 0) != -1) ) { - job_assumes(j, WIFEXITED(wstatus) && WEXITSTATUS(wstatus) == 0); - } - STAILQ_REMOVE(&j->mgr->pending_samples, j, job_s, pending_samples_sle); - - if( j->kill_after_sample ) { - if (unlikely(j->debug_before_kill)) { - job_log(j, LOG_NOTICE, "Exit timeout elapsed. Entering the kernel debugger"); - job_assumes(j, host_reboot(mach_host_self(), HOST_REBOOT_DEBUGGER) == KERN_SUCCESS); - } - - job_log(j, LOG_NOTICE, "Killing..."); - job_kill(j); - } - j->sampling_complete = true; - j->is_being_sampled = false; - jm = j->mgr; - } - - j->tracing_pid = 0; - if( j->reap_after_trace ) { - job_log(j, LOG_DEBUG | LOG_CONSOLE, "Reaping job now that attached tracer is gone."); - struct kevent kev; - EV_SET(&kev, j->p, 0, 0, NOTE_EXIT, 0, 0); - - /* Fake a kevent to keep our logic consistent. */ - job_callback_proc(j, &kev); - - /* Normally, after getting a EVFILT_PROC event, we do garbage collection - * on the root job manager. To make our fakery complete, we will do garbage - * collection at the beginning of the next run loop cycle (after we're done - * draining the current queue of kevents). - */ - job_assumes(j, kevent_mod((uintptr_t)&root_jobmgr->reboot_flags, EVFILT_TIMER, EV_ADD | EV_ONESHOT, NOTE_NSECONDS, 1, root_jobmgr) != -1); - } - - if( jm ) { - jobmgr_dequeue_next_sample(jm); - } -} - -void -job_callback_proc(job_t j, struct kevent *kev) -{ - bool program_changed = false; - int fflags = kev->fflags; - - job_log(j, LOG_DEBUG, "EVFILT_PROC event for job:"); - log_kevent_struct(LOG_DEBUG, kev, 0); - - if( fflags & NOTE_EXIT ) { - if( j->p == (pid_t)kev->ident && !j->anonymous && !j->is_being_sampled ) { - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, j->p }; - struct kinfo_proc kp; - size_t len = sizeof(kp); - - /* Sometimes, the kernel says it succeeded but really didn't. */ - if( job_assumes(j, sysctl(mib, 4, &kp, &len, NULL, 0) != -1) && len == sizeof(kp) ) { - if( !job_assumes(j, kp.kp_eproc.e_ppid == getpid()) ) { - /* Someone has attached to the process with ptrace(). There's a race here. - * If we determine that we are not the parent process and then fail to attach - * a kevent to the parent PID (who is probably using ptrace()), we can take that as an - * indication that the parent exited between sysctl(3) and kevent_mod(). The - * reparenting of the PID should be atomic to us, so in that case, we reap the - * job as normal. - * - * Otherwise, we wait for the death of the parent tracer and then reap, just as we - * would if a job died while we were sampling it at shutdown. - * - * Note that we foolishly assume that in the process *tree* a node cannot be its - * own parent. Apparently, that is not correct. If this is the case, we forsake - * the process to its own devices. Let it reap itself. - */ - if( !job_assumes(j, kp.kp_eproc.e_ppid != (pid_t)kev->ident) ) { - job_log(j, LOG_WARNING, "Job is its own parent and has (somehow) exited. Leaving it to waste away."); - return; - } - if( job_assumes(j, kevent_mod(kp.kp_eproc.e_ppid, EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, j) != -1) ) { - j->tracing_pid = kp.kp_eproc.e_ppid; - j->reap_after_trace = true; - return; - } - } - } - } else if( !j->anonymous ) { - if( j->tracing_pid == (pid_t)kev->ident ) { - job_cleanup_after_tracer(j); - - return; - } else if( j->tracing_pid && !j->reap_after_trace ) { - /* The job exited before our sample completed. */ - job_log(j, LOG_DEBUG | LOG_CONSOLE, "Job has exited. Will reap after tracing PID %i exits.", j->tracing_pid); - j->reap_after_trace = true; - return; - } - } - } - - if (fflags & NOTE_EXEC) { - program_changed = true; - - if (j->anonymous) { - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, j->p }; - struct kinfo_proc kp; - size_t len = sizeof(kp); - - /* Sometimes, the kernel says it succeeded but really didn't. */ - if (job_assumes(j, sysctl(mib, 4, &kp, &len, NULL, 0) != -1) && len == sizeof(kp)) { - char newlabel[1000]; - - snprintf(newlabel, sizeof(newlabel), "%p.anonymous.%s", j, kp.kp_proc.p_comm); - - job_log(j, LOG_INFO, "Program changed. Updating the label to: %s", newlabel); - j->lastlookup = NULL; - j->lastlookup_gennum = 0; - - LIST_REMOVE(j, label_hash_sle); - strcpy((char *)j->label, newlabel); - LIST_INSERT_HEAD(&label_hash[hash_label(j->label)], j, label_hash_sle); - } - } else { - j->did_exec = true; - job_log(j, LOG_DEBUG, "Program changed"); - } - } - - if (fflags & NOTE_FORK) { - job_log(j, LOG_DEBUG, "fork()ed%s", program_changed ? ". For this message only: We don't know whether this event happened before or after execve()." : ""); - job_log_children_without_exec(j); - } - - if (fflags & NOTE_EXIT) { - job_reap(j); - - if( !j->anonymous ) { - j = job_dispatch(j, false); - } else { - job_remove(j); - j = NULL; - } - } -} - -void -job_callback_timer(job_t j, void *ident) -{ - if (j == ident) { - job_log(j, LOG_DEBUG, "j == ident (%p)", ident); - job_dispatch(j, true); - } else if (&j->semaphores == ident) { - job_log(j, LOG_DEBUG, "&j->semaphores == ident (%p)", ident); - job_dispatch(j, false); - } else if (&j->start_interval == ident) { - job_log(j, LOG_DEBUG, "&j->start_interval == ident (%p)", ident); - j->start_pending = true; - job_dispatch(j, false); - } else if (&j->exit_timeout == ident) { - if( !job_assumes(j, j->p != 0) ) { - return; - } - - if( j->clean_kill ) { - job_log(j, LOG_ERR | LOG_CONSOLE, "Clean job failed to exit %u second after receiving SIGKILL.", LAUNCHD_CLEAN_KILL_TIMER); - job_assumes(j, kevent_mod((uintptr_t)&j->exit_timeout, EVFILT_TIMER, EV_DELETE, 0, 0, NULL)); - j->clean_exit_timer_expired = true; - - jobmgr_do_garbage_collection(j->mgr); - return; - } - - /* - * This block might be executed up to 3 times for a given (slow) job - * - once for the SAMPLE_TIMEOUT timer, at which point sampling is triggered - * - once for the exit_timeout timer, at which point: - * - sampling is performed if not triggered previously - * - SIGKILL is being sent to the job - * - once for the SIGKILL_TIMER timer, at which point we log an issue - * with the long SIGKILL - */ - - if( j->per_user ) { - /* Don't sample per-user launchd's. */ - j->sampling_complete = true; - } - bool was_is_or_will_be_sampled = ( j->sampling_complete || j->is_being_sampled || j->pending_sample ); - bool should_enqueue = ( !was_is_or_will_be_sampled && do_apple_internal_logging ); - - if (j->sent_sigkill) { - uint64_t td = runtime_get_nanoseconds_since(j->sent_signal_time); - - td /= NSEC_PER_SEC; - td -= j->clean_kill ? 0 : j->exit_timeout; - - job_log(j, LOG_WARNING | LOG_CONSOLE, "Did not die after sending SIGKILL %llu seconds ago...", td); - } else if( should_enqueue && (!j->exit_timeout || (LAUNCHD_SAMPLE_TIMEOUT < j->exit_timeout)) ) { - /* This should work even if the job changes its exit_timeout midstream */ - job_log(j, LOG_NOTICE | LOG_CONSOLE, "Sampling timeout elapsed (%u seconds). Scheduling a sample...", LAUNCHD_SAMPLE_TIMEOUT); - if (j->exit_timeout) { - unsigned int ttk = (j->exit_timeout - LAUNCHD_SAMPLE_TIMEOUT); - job_assumes(j, kevent_mod((uintptr_t)&j->exit_timeout, EVFILT_TIMER, - EV_ADD|EV_ONESHOT, NOTE_SECONDS, ttk, j) != -1); - job_log(j, LOG_NOTICE | LOG_CONSOLE, "Scheduled new exit timeout for %u seconds later", ttk); - } - - STAILQ_INSERT_TAIL(&j->mgr->pending_samples, j, pending_samples_sle); - j->pending_sample = true; - jobmgr_dequeue_next_sample(j->mgr); - } else { - if( do_apple_internal_logging && !j->sampling_complete ) { - if( j->is_being_sampled || j->pending_sample ) { - char pidstr[24] = { 0 }; - snprintf(pidstr, sizeof(pidstr), "[%i] ", j->tracing_pid); - - job_log(j, LOG_DEBUG | LOG_CONSOLE, "Exit timeout elapsed (%u seconds). Will kill after sample%shas completed.", j->exit_timeout, j->tracing_pid ? pidstr : " "); - j->kill_after_sample = true; - } else { - job_log(j, LOG_DEBUG | LOG_CONSOLE, "Exit timeout elapsed (%u seconds). Will sample and then kill.", j->exit_timeout); - - STAILQ_INSERT_TAIL(&j->mgr->pending_samples, j, pending_samples_sle); - j->pending_sample = true; - } - - jobmgr_dequeue_next_sample(j->mgr); - } else { - if (unlikely(j->debug_before_kill)) { - job_log(j, LOG_NOTICE, "Exit timeout elapsed. Entering the kernel debugger"); - job_assumes(j, host_reboot(mach_host_self(), HOST_REBOOT_DEBUGGER) == KERN_SUCCESS); - } - job_log(j, LOG_WARNING | LOG_CONSOLE, "Exit timeout elapsed (%u seconds). Killing", j->exit_timeout); - job_kill(j); - jobmgr_do_garbage_collection(j->mgr); - } - } - } else { - job_assumes(j, false); - } -} - -void -job_callback_read(job_t j, int ident) -{ - if (ident == j->log_redirect_fd) { - job_log_stdouterr(j); - } else if (ident == j->stdin_fd) { - job_dispatch(j, true); - } else { - socketgroup_callback(j); - } -} - -void -jobmgr_reap_bulk(jobmgr_t jm, struct kevent *kev) -{ - jobmgr_t jmi; - job_t j; - - SLIST_FOREACH(jmi, &jm->submgrs, sle) { - jobmgr_reap_bulk(jmi, kev); - } - - if ((j = jobmgr_find_by_pid(jm, (pid_t)kev->ident, false))) { - kev->udata = j; - job_callback(j, kev); - } -} - -void -jobmgr_callback(void *obj, struct kevent *kev) -{ - jobmgr_t jm = obj; - job_t ji; - - switch (kev->filter) { - case EVFILT_PROC: - jobmgr_reap_bulk(jm, kev); - root_jobmgr = jobmgr_do_garbage_collection(root_jobmgr); - break; - case EVFILT_SIGNAL: - switch (kev->ident) { - case SIGTERM: - jobmgr_log(jm, LOG_DEBUG, "Got SIGTERM. Shutting down."); - return launchd_shutdown(); - case SIGUSR1: - return calendarinterval_callback(); - case SIGUSR2: - fake_shutdown_in_progress = true; - runtime_setlogmask(LOG_UPTO(LOG_DEBUG)); - - runtime_closelog(); /* HACK -- force 'start' time to be set */ - - if (pid1_magic) { - int64_t now = runtime_get_wall_time(); - - jobmgr_log(jm, LOG_NOTICE, "Anticipatory shutdown began at: %lld.%06llu", now / USEC_PER_SEC, now % USEC_PER_SEC); - - LIST_FOREACH(ji, &root_jobmgr->jobs, sle) { - if (ji->per_user && ji->p) { - job_assumes(ji, runtime_kill(ji->p, SIGUSR2) != -1); - } - } - } else { - jobmgr_log(jm, LOG_NOTICE, "Anticipatory per-user launchd shutdown"); - } - - return; - default: - return (void)jobmgr_assumes(jm, false); - } - break; - case EVFILT_FS: - if (kev->fflags & VQ_MOUNT) { - jobmgr_dispatch_all(jm, true); - } - jobmgr_dispatch_all_semaphores(jm); - break; - case EVFILT_TIMER: - if( kev->ident == (uintptr_t)&sorted_calendar_events ) { - calendarinterval_callback(); - } else if( kev->ident == (uintptr_t)jm ) { - jobmgr_log(jm, LOG_DEBUG, "Shutdown timer firing."); - jobmgr_still_alive_with_check(jm); - } else if( kev->ident == (uintptr_t)&jm->reboot_flags ) { - jobmgr_do_garbage_collection(jm); - } else if( kev->ident == (uintptr_t)&g_runtime_busy_time ) { - jobmgr_log(jm, LOG_DEBUG, "Idle exit timer fired. Shutting down."); - if( jobmgr_assumes(jm, runtime_busy_cnt == 0) ) { - return launchd_shutdown(); - } - } - break; - case EVFILT_VNODE: - if( kev->ident == (uintptr_t)s_no_hang_fd ) { - int _no_hang_fd = open("/dev/autofs_nowait", O_EVTONLY | O_NONBLOCK); - if( unlikely(_no_hang_fd != -1) ) { - jobmgr_log(root_jobmgr, LOG_DEBUG, "/dev/autofs_nowait has appeared!"); - jobmgr_assumes(root_jobmgr, kevent_mod((uintptr_t)s_no_hang_fd, EVFILT_VNODE, EV_DELETE, 0, 0, NULL) != -1); - jobmgr_assumes(root_jobmgr, runtime_close(s_no_hang_fd) != -1); - s_no_hang_fd = _fd(_no_hang_fd); - } - } else if( pid1_magic && g_console && kev->ident == (uintptr_t)fileno(g_console) ) { - int cfd = -1; - if( launchd_assumes((cfd = open(_PATH_CONSOLE, O_WRONLY | O_NOCTTY)) != -1) ) { - _fd(cfd); - if( !launchd_assumes((g_console = fdopen(cfd, "w")) != NULL) ) { - close(cfd); - } - } - } - break; - default: - return (void)jobmgr_assumes(jm, false); - } -} - -void -job_callback(void *obj, struct kevent *kev) -{ - job_t j = obj; - - job_log(j, LOG_DEBUG, "Dispatching kevent callback."); - - switch (kev->filter) { - case EVFILT_PROC: - return job_callback_proc(j, kev); - case EVFILT_TIMER: - return job_callback_timer(j, (void *) kev->ident); - case EVFILT_VNODE: - return semaphoreitem_callback(j, kev); - case EVFILT_READ: - return job_callback_read(j, (int) kev->ident); - case EVFILT_MACHPORT: - return (void)job_dispatch(j, true); - default: - return (void)job_assumes(j, false); - } -} - -void -job_start(job_t j) -{ - uint64_t td; - int spair[2]; - int execspair[2]; - int oepair[2]; - char nbuf[64]; - pid_t c; - bool sipc = false; - u_int proc_fflags = NOTE_EXIT|NOTE_FORK|NOTE_EXEC; - - if (!job_assumes(j, j->mgr != NULL)) { - return; - } - - if (unlikely(job_active(j))) { - job_log(j, LOG_DEBUG, "Already started"); - return; - } - - /* - * Some users adjust the wall-clock and then expect software to not notice. - * Therefore, launchd must use an absolute clock instead of the wall clock - * wherever possible. - */ - td = runtime_get_nanoseconds_since(j->start_time); - td /= NSEC_PER_SEC; - - if (j->start_time && (td < j->min_run_time) && !j->legacy_mach_job && !j->inetcompat) { - time_t respawn_delta = j->min_run_time - (uint32_t)td; - - /* - * We technically should ref-count throttled jobs to prevent idle exit, - * but we're not directly tracking the 'throttled' state at the moment. - */ - - job_log(j, LOG_WARNING, "Throttling respawn: Will start in %ld seconds", respawn_delta); - job_assumes(j, kevent_mod((uintptr_t)j, EVFILT_TIMER, EV_ADD|EV_ONESHOT, NOTE_SECONDS, respawn_delta, j) != -1); - job_ignore(j); - return; - } - - if (likely(!j->legacy_mach_job)) { - sipc = ((!SLIST_EMPTY(&j->sockets) || !SLIST_EMPTY(&j->machservices)) && !j->deny_job_creation) || j->embedded_special_privileges; - } - - if( sipc ) { - job_assumes(j, socketpair(AF_UNIX, SOCK_STREAM, 0, spair) != -1); - } - - job_assumes(j, socketpair(AF_UNIX, SOCK_STREAM, 0, execspair) != -1); - - if (likely(!j->legacy_mach_job) && job_assumes(j, pipe(oepair) != -1)) { - j->log_redirect_fd = _fd(oepair[0]); - job_assumes(j, fcntl(j->log_redirect_fd, F_SETFL, O_NONBLOCK) != -1); - job_assumes(j, kevent_mod(j->log_redirect_fd, EVFILT_READ, EV_ADD, 0, 0, j) != -1); - } - - switch (c = runtime_fork(j->weird_bootstrap ? j->j_port : j->mgr->jm_port)) { - case -1: - job_log_error(j, LOG_ERR, "fork() failed, will try again in one second"); - job_assumes(j, kevent_mod((uintptr_t)j, EVFILT_TIMER, EV_ADD|EV_ONESHOT, NOTE_SECONDS, 1, j) != -1); - job_ignore(j); - - job_assumes(j, runtime_close(execspair[0]) == 0); - job_assumes(j, runtime_close(execspair[1]) == 0); - if (sipc) { - job_assumes(j, runtime_close(spair[0]) == 0); - job_assumes(j, runtime_close(spair[1]) == 0); - } - if (likely(!j->legacy_mach_job)) { - job_assumes(j, runtime_close(oepair[0]) != -1); - job_assumes(j, runtime_close(oepair[1]) != -1); - j->log_redirect_fd = 0; - } - break; - case 0: - if (unlikely(_vproc_post_fork_ping())) { - _exit(EXIT_FAILURE); - } - if (!j->legacy_mach_job) { - job_assumes(j, dup2(oepair[1], STDOUT_FILENO) != -1); - job_assumes(j, dup2(oepair[1], STDERR_FILENO) != -1); - job_assumes(j, runtime_close(oepair[1]) != -1); - } - job_assumes(j, runtime_close(execspair[0]) == 0); - /* wait for our parent to say they've attached a kevent to us */ - read(_fd(execspair[1]), &c, sizeof(c)); - - if (sipc) { - job_assumes(j, runtime_close(spair[0]) == 0); - snprintf(nbuf, sizeof(nbuf), "%d", spair[1]); - setenv(LAUNCHD_TRUSTED_FD_ENV, nbuf, 1); - } - job_start_child(j); - break; - default: - j->start_time = runtime_get_opaque_time(); - - job_log(j, LOG_DEBUG, "Started as PID: %u", c); - - j->did_exec = false; - j->checkedin = false; - j->start_pending = false; - j->reaped = false; - j->crashed = false; - j->stopped = false; - if( j->needs_kickoff ) { - j->needs_kickoff = false; - - if( SLIST_EMPTY(&j->semaphores) ) { - j->ondemand = false; - } - } - - if( j->has_console ) { - g_wsp = c; - } - - runtime_add_ref(); - total_children++; - LIST_INSERT_HEAD(&j->mgr->active_jobs[ACTIVE_JOB_HASH(c)], j, pid_hash_sle); - - if (likely(!j->legacy_mach_job)) { - job_assumes(j, runtime_close(oepair[1]) != -1); - } - j->p = c; - if (unlikely(j->hopefully_exits_first)) { - j->mgr->hopefully_first_cnt++; - } else if (likely(!j->hopefully_exits_last)) { - j->mgr->normal_active_cnt++; - } - j->fork_fd = _fd(execspair[0]); - job_assumes(j, runtime_close(execspair[1]) == 0); - if (sipc) { - job_assumes(j, runtime_close(spair[1]) == 0); - ipc_open(_fd(spair[0]), j); - } - if (job_assumes(j, kevent_mod(c, EVFILT_PROC, EV_ADD, proc_fflags, 0, root_jobmgr ? root_jobmgr : j->mgr) != -1)) { - job_ignore(j); - } else { - job_reap(j); - } - - j->wait4debugger_oneshot = false; - - struct envitem *ei = NULL, *et = NULL; - SLIST_FOREACH_SAFE( ei, &j->env, sle, et ) { - if( ei->one_shot ) { - SLIST_REMOVE(&j->env, ei, envitem, sle); - } - } - - if (likely(!j->stall_before_exec)) { - job_uncork_fork(j); - } - break; - } -} - -void -job_start_child(job_t j) -{ - typeof(posix_spawn) *psf; - const char *file2exec = "/usr/libexec/launchproxy"; - const char **argv; - posix_spawnattr_t spattr; - int gflags = GLOB_NOSORT|GLOB_NOCHECK|GLOB_TILDE|GLOB_DOOFFS; - glob_t g; - short spflags = POSIX_SPAWN_SETEXEC; - size_t binpref_out_cnt = 0; - size_t i; - - job_assumes(j, posix_spawnattr_init(&spattr) == 0); - - job_setup_attributes(j); - - if (unlikely(j->argv && j->globargv)) { - g.gl_offs = 1; - for (i = 0; i < j->argc; i++) { - if (i > 0) { - gflags |= GLOB_APPEND; - } - if (glob(j->argv[i], gflags, NULL, &g) != 0) { - job_log_error(j, LOG_ERR, "glob(\"%s\")", j->argv[i]); - exit(EXIT_FAILURE); - } - } - g.gl_pathv[0] = (char *)file2exec; - argv = (const char **)g.gl_pathv; - } else if (likely(j->argv)) { - argv = alloca((j->argc + 2) * sizeof(char *)); - argv[0] = file2exec; - for (i = 0; i < j->argc; i++) { - argv[i + 1] = j->argv[i]; - } - argv[i + 1] = NULL; - } else { - argv = alloca(3 * sizeof(char *)); - argv[0] = file2exec; - argv[1] = j->prog; - argv[2] = NULL; - } - - if (likely(!j->inetcompat)) { - argv++; - } - - if (unlikely(j->wait4debugger || j->wait4debugger_oneshot)) { - job_log(j, LOG_WARNING, "Spawned and waiting for the debugger to attach before continuing..."); - spflags |= POSIX_SPAWN_START_SUSPENDED; - } - - job_assumes(j, posix_spawnattr_setflags(&spattr, spflags) == 0); - - if (unlikely(j->j_binpref_cnt)) { - job_assumes(j, posix_spawnattr_setbinpref_np(&spattr, j->j_binpref_cnt, j->j_binpref, &binpref_out_cnt) == 0); - job_assumes(j, binpref_out_cnt == j->j_binpref_cnt); - } - -#if HAVE_QUARANTINE - if (j->quarantine_data) { - qtn_proc_t qp; - - if (job_assumes(j, qp = qtn_proc_alloc())) { - if (job_assumes(j, qtn_proc_init_with_data(qp, j->quarantine_data, j->quarantine_data_sz) == 0)) { - job_assumes(j, qtn_proc_apply_to_self(qp) == 0); - } - } - } -#endif - -#if HAVE_SANDBOX - if (j->seatbelt_profile) { - char *seatbelt_err_buf = NULL; - - if (!job_assumes(j, sandbox_init(j->seatbelt_profile, j->seatbelt_flags, &seatbelt_err_buf) != -1)) { - if (seatbelt_err_buf) { - job_log(j, LOG_ERR, "Sandbox failed to init: %s", seatbelt_err_buf); - } - goto out_bad; - } - } -#endif - - psf = j->prog ? posix_spawn : posix_spawnp; - - if (likely(!j->inetcompat)) { - file2exec = j->prog ? j->prog : argv[0]; - } - - errno = psf(NULL, file2exec, NULL, &spattr, (char *const*)argv, environ); - job_log_error(j, LOG_ERR, "posix_spawn(\"%s\", ...)", file2exec); - -#if HAVE_SANDBOX -out_bad: -#endif - _exit(EXIT_FAILURE); -} - -void -jobmgr_export_env_from_other_jobs(jobmgr_t jm, launch_data_t dict) -{ - launch_data_t tmp; - struct envitem *ei; - job_t ji; - - if (jm->parentmgr) { - jobmgr_export_env_from_other_jobs(jm->parentmgr, dict); - } else { - char **tmpenviron = environ; - for (; *tmpenviron; tmpenviron++) { - char envkey[1024]; - launch_data_t s = launch_data_alloc(LAUNCH_DATA_STRING); - launch_data_set_string(s, strchr(*tmpenviron, '=') + 1); - strncpy(envkey, *tmpenviron, sizeof(envkey)); - *(strchr(envkey, '=')) = '\0'; - launch_data_dict_insert(dict, s, envkey); - } - } - - LIST_FOREACH(ji, &jm->jobs, sle) { - SLIST_FOREACH(ei, &ji->global_env, sle) { - if ((tmp = launch_data_new_string(ei->value))) { - launch_data_dict_insert(dict, tmp, ei->key); - } - } - } -} - -void -jobmgr_setup_env_from_other_jobs(jobmgr_t jm) -{ - struct envitem *ei; - job_t ji; - - if (jm->parentmgr) { - jobmgr_setup_env_from_other_jobs(jm->parentmgr); - } - - LIST_FOREACH(ji, &jm->global_env_jobs, global_env_sle) { - SLIST_FOREACH(ei, &ji->global_env, sle) { - setenv(ei->key, ei->value, 1); - } - } -} - -void -job_log_pids_with_weird_uids(job_t j) -{ - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_ALL }; - size_t i, kp_cnt, len = sizeof(struct kinfo_proc) * get_kern_max_proc(); - struct kinfo_proc *kp; - uid_t u = j->mach_uid; - - if (!do_apple_internal_logging) { - return; - } - - kp = malloc(len); - - if (!job_assumes(j, kp != NULL)) { - return; - } - - runtime_ktrace(RTKT_LAUNCHD_FINDING_WEIRD_UIDS, j->p, u, 0); - - if (!job_assumes(j, sysctl(mib, 3, kp, &len, NULL, 0) != -1)) { - goto out; - } - - kp_cnt = len / sizeof(struct kinfo_proc); - - for (i = 0; i < kp_cnt; i++) { - uid_t i_euid = kp[i].kp_eproc.e_ucred.cr_uid; - uid_t i_uid = kp[i].kp_eproc.e_pcred.p_ruid; - uid_t i_svuid = kp[i].kp_eproc.e_pcred.p_svuid; - pid_t i_pid = kp[i].kp_proc.p_pid; - - if (i_euid != u && i_uid != u && i_svuid != u) { - continue; - } - - job_log(j, LOG_ERR, "PID %u \"%s\" has no account to back it! Real/effective/saved UIDs: %u/%u/%u", - i_pid, kp[i].kp_proc.p_comm, i_uid, i_euid, i_svuid); - -/* Temporarily disabled due to 5423935 and 4946119. */ -#if 0 - /* Ask the accountless process to exit. */ - job_assumes(j, runtime_kill(i_pid, SIGTERM) != -1); -#endif - } - -out: - free(kp); -} - -void -job_postfork_test_user(job_t j) -{ - /* This function is all about 5201578 */ - - const char *home_env_var = getenv("HOME"); - const char *user_env_var = getenv("USER"); - const char *logname_env_var = getenv("LOGNAME"); - uid_t tmp_uid, local_uid = getuid(); - gid_t tmp_gid, local_gid = getgid(); - char shellpath[PATH_MAX]; - char homedir[PATH_MAX]; - char loginname[2000]; - struct passwd *pwe; - - - if (!job_assumes(j, home_env_var && user_env_var && logname_env_var - && strcmp(user_env_var, logname_env_var) == 0)) { - goto out_bad; - } - - if ((pwe = getpwnam(user_env_var)) == NULL) { - job_log(j, LOG_ERR, "The account \"%s\" has been deleted out from under us!", user_env_var); - goto out_bad; - } - - /* - * We must copy the results of getpw*(). - * - * Why? Because subsequent API calls may call getpw*() as a part of - * their implementation. Since getpw*() returns a [now thread scoped] - * global, we must therefore cache the results before continuing. - */ - - tmp_uid = pwe->pw_uid; - tmp_gid = pwe->pw_gid; - - strlcpy(shellpath, pwe->pw_shell, sizeof(shellpath)); - strlcpy(loginname, pwe->pw_name, sizeof(loginname)); - strlcpy(homedir, pwe->pw_dir, sizeof(homedir)); - - if (strcmp(loginname, logname_env_var) != 0) { - job_log(j, LOG_ERR, "The %s environmental variable changed out from under us!", "USER"); - goto out_bad; - } - if (strcmp(homedir, home_env_var) != 0) { - job_log(j, LOG_ERR, "The %s environmental variable changed out from under us!", "HOME"); - goto out_bad; - } - if (local_uid != tmp_uid) { - job_log(j, LOG_ERR, "The %cID of the account (%u) changed out from under us (%u)!", - 'U', tmp_uid, local_uid); - goto out_bad; - } - if (local_gid != tmp_gid) { - job_log(j, LOG_ERR, "The %cID of the account (%u) changed out from under us (%u)!", - 'G', tmp_gid, local_gid); - goto out_bad; - } - - return; -out_bad: -#if 0 - job_assumes(j, runtime_kill(getppid(), SIGTERM) != -1); - _exit(EXIT_FAILURE); -#else - job_log(j, LOG_WARNING, "In a future build of the OS, this error will be fatal."); -#endif -} - -void -job_postfork_become_user(job_t j) -{ - char loginname[2000]; - char tmpdirpath[PATH_MAX]; - char shellpath[PATH_MAX]; - char homedir[PATH_MAX]; - struct passwd *pwe; - size_t r; - gid_t desired_gid = -1; - uid_t desired_uid = -1; - - if (getuid() != 0) { - return job_postfork_test_user(j); - } - - /* - * I contend that having UID == 0 and GID != 0 is of dubious value. - * Nevertheless, this used to work in Tiger. See: 5425348 - */ - if (j->groupname && !j->username) { - j->username = "root"; - } - - if (j->username) { - if ((pwe = getpwnam(j->username)) == NULL) { - job_log(j, LOG_ERR, "getpwnam(\"%s\") failed", j->username); - _exit(EXIT_FAILURE); - } - } else if (j->mach_uid) { - if ((pwe = getpwuid(j->mach_uid)) == NULL) { - job_log(j, LOG_ERR, "getpwuid(\"%u\") failed", j->mach_uid); - job_log_pids_with_weird_uids(j); - _exit(EXIT_FAILURE); - } - } else { - return; - } - - /* - * We must copy the results of getpw*(). - * - * Why? Because subsequent API calls may call getpw*() as a part of - * their implementation. Since getpw*() returns a [now thread scoped] - * global, we must therefore cache the results before continuing. - */ - - desired_uid = pwe->pw_uid; - desired_gid = pwe->pw_gid; - - strlcpy(shellpath, pwe->pw_shell, sizeof(shellpath)); - strlcpy(loginname, pwe->pw_name, sizeof(loginname)); - strlcpy(homedir, pwe->pw_dir, sizeof(homedir)); - - if (unlikely(pwe->pw_expire && time(NULL) >= pwe->pw_expire)) { - job_log(j, LOG_ERR, "Expired account"); - _exit(EXIT_FAILURE); - } - - - if (unlikely(j->username && strcmp(j->username, loginname) != 0)) { - job_log(j, LOG_WARNING, "Suspicious setup: User \"%s\" maps to user: %s", j->username, loginname); - } else if (unlikely(j->mach_uid && (j->mach_uid != desired_uid))) { - job_log(j, LOG_WARNING, "Suspicious setup: UID %u maps to UID %u", j->mach_uid, desired_uid); - } - - if (j->groupname) { - struct group *gre; - - if (unlikely((gre = getgrnam(j->groupname)) == NULL)) { - job_log(j, LOG_ERR, "getgrnam(\"%s\") failed", j->groupname); - _exit(EXIT_FAILURE); - } - - desired_gid = gre->gr_gid; - } - - if (!job_assumes(j, setlogin(loginname) != -1)) { - _exit(EXIT_FAILURE); - } - - if (!job_assumes(j, setgid(desired_gid) != -1)) { - _exit(EXIT_FAILURE); - } - - /* - * The kernel team and the DirectoryServices team want initgroups() - * called after setgid(). See 4616864 for more information. - */ - - if (likely(!j->no_init_groups)) { - #if 1 - if (!job_assumes(j, initgroups(loginname, desired_gid) != -1)) { - _exit(EXIT_FAILURE); - } - #else - /* Do our own little initgroups(). We do this to guarantee that we're - * always opted into dynamic group resolution in the kernel. initgroups(3) - * does not make this guarantee. - */ - int groups[NGROUPS], ngroups; - - /* A failure here isn't fatal, and we'll still get data we can use. */ - job_assumes(j, getgrouplist(j->username, desired_gid, groups, &ngroups) != -1); - - if( !job_assumes(j, syscall(SYS_initgroups, ngroups, groups, desired_uid) != -1) ) { - _exit(EXIT_FAILURE); - } - #endif - } - - if (!job_assumes(j, setuid(desired_uid) != -1)) { - _exit(EXIT_FAILURE); - } - - r = confstr(_CS_DARWIN_USER_TEMP_DIR, tmpdirpath, sizeof(tmpdirpath)); - - if (likely(r > 0 && r < sizeof(tmpdirpath))) { - setenv("TMPDIR", tmpdirpath, 0); - } - - setenv("SHELL", shellpath, 0); - setenv("HOME", homedir, 0); - setenv("USER", loginname, 0); - setenv("LOGNAME", loginname, 0); -} - -void -job_setup_attributes(job_t j) -{ - struct limititem *li; - struct envitem *ei; - - if (unlikely(j->setnice)) { - job_assumes(j, setpriority(PRIO_PROCESS, 0, j->nice) != -1); - } - - SLIST_FOREACH(li, &j->limits, sle) { - struct rlimit rl; - - if (!job_assumes(j, getrlimit(li->which, &rl) != -1)) { - continue; - } - - if (li->sethard) { - rl.rlim_max = li->lim.rlim_max; - } - if (li->setsoft) { - rl.rlim_cur = li->lim.rlim_cur; - } - - if (setrlimit(li->which, &rl) == -1) { - job_log_error(j, LOG_WARNING, "setrlimit()"); - } - } - -#if !TARGET_OS_EMBEDDED - if( unlikely(j->per_user) ) { - auditinfo_addr_t auinfo = { - .ai_termid = { .at_type = AU_IPv4 }, - .ai_auid = j->mach_uid, - .ai_asid = AU_ASSIGN_ASID, - }; - (void)au_user_mask(j->username, &auinfo.ai_mask); - - if( !launchd_assumes(setaudit_addr(&auinfo, sizeof(auinfo)) != -1) ) { - runtime_syslog(LOG_WARNING, "Could not set audit session! (errno = %d)", errno); - _exit(EXIT_FAILURE); - } else { - job_log(j, LOG_DEBUG, "Created new security session for per-user launchd."); - } - } -#endif - - if (unlikely(!j->inetcompat && j->session_create)) { - launchd_SessionCreate(); - } - - if (unlikely(j->low_pri_io)) { - job_assumes(j, setiopolicy_np(IOPOL_TYPE_DISK, IOPOL_SCOPE_PROCESS, IOPOL_THROTTLE) != -1); - } - if (unlikely(j->rootdir)) { - job_assumes(j, chroot(j->rootdir) != -1); - job_assumes(j, chdir(".") != -1); - } - - job_postfork_become_user(j); - - if (unlikely(j->workingdir)) { - job_assumes(j, chdir(j->workingdir) != -1); - } - - if (unlikely(j->setmask)) { - umask(j->mask); - } - - if (j->stdin_fd) { - job_assumes(j, dup2(j->stdin_fd, STDIN_FILENO) != -1); - } else { - job_setup_fd(j, STDIN_FILENO, j->stdinpath, O_RDONLY|O_CREAT); - } - job_setup_fd(j, STDOUT_FILENO, j->stdoutpath, O_WRONLY|O_CREAT|O_APPEND); - job_setup_fd(j, STDERR_FILENO, j->stderrpath, O_WRONLY|O_CREAT|O_APPEND); - - jobmgr_setup_env_from_other_jobs(j->mgr); - - SLIST_FOREACH(ei, &j->env, sle) { - setenv(ei->key, ei->value, 1); - } - - if( do_apple_internal_logging ) { - setenv(LAUNCHD_DO_APPLE_INTERNAL_LOGGING, "true", 1); - } - -#if !TARGET_OS_EMBEDDED - if( j->jetsam_properties ) { - job_assumes(j, proc_setpcontrol(PROC_SETPC_TERMINATE) == 0); - } -#endif - -#if TARGET_OS_EMBEDDED - if( j->main_thread_priority != 0 ) { - struct sched_param params; - bzero(¶ms, sizeof(params)); - params.sched_priority = j->main_thread_priority; - job_assumes(j, pthread_setschedparam(pthread_self(), SCHED_OTHER, ¶ms) != -1); - } -#endif - - /* - * We'd like to call setsid() unconditionally, but we have reason to - * believe that prevents launchd from being able to send signals to - * setuid children. We'll settle for process-groups. - */ - if (getppid() != 1) { - job_assumes(j, setpgid(0, 0) != -1); - } else { - job_assumes(j, setsid() != -1); - } -} - -void -job_setup_fd(job_t j, int target_fd, const char *path, int flags) -{ - int fd; - - if (!path) { - return; - } - - if ((fd = open(path, flags|O_NOCTTY, DEFFILEMODE)) == -1) { - job_log_error(j, LOG_WARNING, "open(\"%s\", ...)", path); - return; - } - - job_assumes(j, dup2(fd, target_fd) != -1); - job_assumes(j, runtime_close(fd) == 0); -} - -int -dir_has_files(job_t j, const char *path) -{ - DIR *dd = opendir(path); - struct dirent *de; - bool r = 0; - - if (unlikely(!dd)) { - return -1; - } - - while ((de = readdir(dd))) { - if (strcmp(de->d_name, ".") && strcmp(de->d_name, "..")) { - r = 1; - break; - } - } - - job_assumes(j, closedir(dd) == 0); - return r; -} - -void -calendarinterval_setalarm(job_t j, struct calendarinterval *ci) -{ - struct calendarinterval *ci_iter, *ci_prev = NULL; - time_t later, head_later; - - later = cronemu(ci->when.tm_mon, ci->when.tm_mday, ci->when.tm_hour, ci->when.tm_min); - - if (ci->when.tm_wday != -1) { - time_t otherlater = cronemu_wday(ci->when.tm_wday, ci->when.tm_hour, ci->when.tm_min); - - if (ci->when.tm_mday == -1) { - later = otherlater; - } else { - later = later < otherlater ? later : otherlater; - } - } - - ci->when_next = later; - - LIST_FOREACH(ci_iter, &sorted_calendar_events, global_sle) { - if (ci->when_next < ci_iter->when_next) { - LIST_INSERT_BEFORE(ci_iter, ci, global_sle); - break; - } - - ci_prev = ci_iter; - } - - if (ci_iter == NULL) { - /* ci must want to fire after every other timer, or there are no timers */ - - if (LIST_EMPTY(&sorted_calendar_events)) { - LIST_INSERT_HEAD(&sorted_calendar_events, ci, global_sle); - } else { - LIST_INSERT_AFTER(ci_prev, ci, global_sle); - } - } - - head_later = LIST_FIRST(&sorted_calendar_events)->when_next; - - if (job_assumes(j, kevent_mod((uintptr_t)&sorted_calendar_events, EVFILT_TIMER, EV_ADD, NOTE_ABSOLUTE|NOTE_SECONDS, head_later, root_jobmgr) != -1)) { - char time_string[100]; - size_t time_string_len; - - ctime_r(&later, time_string); - time_string_len = strlen(time_string); - - if (likely(time_string_len && time_string[time_string_len - 1] == '\n')) { - time_string[time_string_len - 1] = '\0'; - } - - job_log(j, LOG_INFO, "Scheduled to run again at %s", time_string); - } -} - -void -extract_rcsid_substr(const char *i, char *o, size_t osz) -{ - char *rcs_rev_tmp = strchr(i, ' '); - - if (!rcs_rev_tmp) { - strlcpy(o, i, osz); - } else { - strlcpy(o, rcs_rev_tmp + 1, osz); - rcs_rev_tmp = strchr(o, ' '); - if (rcs_rev_tmp) { - *rcs_rev_tmp = '\0'; - } - } -} - -void -jobmgr_log_bug(jobmgr_t jm, unsigned int line) -{ - static const char *file; - int saved_errno = errno; - char buf[100]; - - runtime_ktrace1(RTKT_LAUNCHD_BUG); - - extract_rcsid_substr(__rcs_file_version__, buf, sizeof(buf)); - - if (!file) { - file = strrchr(__FILE__, '/'); - if (!file) { - file = __FILE__; - } else { - file += 1; - } - } - - /* the only time 'jm' should not be set is if setting up the first bootstrap fails for some reason */ - if (likely(jm)) { - jobmgr_log(jm, LOG_NOTICE, "Bug: %s:%u (%s):%u", file, line, buf, saved_errno); - } else { - runtime_syslog(LOG_NOTICE, "Bug: %s:%u (%s):%u", file, line, buf, saved_errno); - } -} - -void -job_log_bug(job_t j, unsigned int line) -{ - static const char *file; - int saved_errno = errno; - char buf[100]; - - runtime_ktrace1(RTKT_LAUNCHD_BUG); - - extract_rcsid_substr(__rcs_file_version__, buf, sizeof(buf)); - - if (!file) { - file = strrchr(__FILE__, '/'); - if (!file) { - file = __FILE__; - } else { - file += 1; - } - } - - /* I cannot think of any reason why 'j' should ever be NULL, nor have I ever seen the case in the wild */ - if (likely(j)) { - job_log(j, LOG_NOTICE, "Bug: %s:%u (%s):%u", file, line, buf, saved_errno); - } else { - runtime_syslog(LOG_NOTICE, "Bug: %s:%u (%s):%u", file, line, buf, saved_errno); - } -} - -void -job_logv(job_t j, int pri, int err, const char *msg, va_list ap) -{ - const char *label2use = j ? j->label : "com.apple.launchd.NULL"; - const char *mgr2use = j ? j->mgr->name : "NULL"; - struct runtime_syslog_attr attr = { g_my_label, label2use, mgr2use, pri, getuid(), getpid(), j ? j->p : 0 }; - char *newmsg; - int oldmask = 0; - size_t newmsgsz; - - /* - * Hack: If bootstrap_port is set, we must be on the child side of a - * fork(), but before the exec*(). Let's route the log message back to - * launchd proper. - */ - if (bootstrap_port) { - return _vproc_logv(pri, err, msg, ap); - } - - newmsgsz = strlen(msg) + 200; - newmsg = alloca(newmsgsz); - - if (err) { - #if !TARGET_OS_EMBEDDED - snprintf(newmsg, newmsgsz, "%s: %s", msg, strerror(err)); - #else - snprintf(newmsg, newmsgsz, "(%s) %s: %s", label2use, msg, strerror(err)); - #endif - } else { - #if !TARGET_OS_EMBEDDED - snprintf(newmsg, newmsgsz, "%s", msg); - #else - snprintf(newmsg, newmsgsz, "(%s) %s", label2use, msg); - #endif - } - - if( j && unlikely(j->debug) ) { - oldmask = setlogmask(LOG_UPTO(LOG_DEBUG)); - } - - runtime_vsyslog(&attr, newmsg, ap); - - if( j && unlikely(j->debug) ) { - setlogmask(oldmask); - } -} - -void -job_log_error(job_t j, int pri, const char *msg, ...) -{ - va_list ap; - - va_start(ap, msg); - job_logv(j, pri, errno, msg, ap); - va_end(ap); -} - -void -job_log(job_t j, int pri, const char *msg, ...) -{ - va_list ap; - - va_start(ap, msg); - job_logv(j, pri, 0, msg, ap); - va_end(ap); -} - -#if 0 -void -jobmgr_log_error(jobmgr_t jm, int pri, const char *msg, ...) -{ - va_list ap; - - va_start(ap, msg); - jobmgr_logv(jm, pri, errno, msg, ap); - va_end(ap); -} -#endif - -void -jobmgr_log(jobmgr_t jm, int pri, const char *msg, ...) -{ - va_list ap; - - va_start(ap, msg); - jobmgr_logv(jm, pri, 0, msg, ap); - va_end(ap); -} - -void -jobmgr_logv(jobmgr_t jm, int pri, int err, const char *msg, va_list ap) -{ - char *newmsg; - char *newname; - size_t i, o, jmname_len = strlen(jm->name), newmsgsz; - - newname = alloca((jmname_len + 1) * 2); - newmsgsz = (jmname_len + 1) * 2 + strlen(msg) + 100; - newmsg = alloca(newmsgsz); - - for (i = 0, o = 0; i < jmname_len; i++, o++) { - if (jm->name[i] == '%') { - newname[o] = '%'; - o++; - } - newname[o] = jm->name[i]; - } - newname[o] = '\0'; - - if (err) { - snprintf(newmsg, newmsgsz, "%s: %s: %s", newname, msg, strerror(err)); - } else { - snprintf(newmsg, newmsgsz, "%s: %s", newname, msg); - } - - if (jm->parentmgr) { - jobmgr_logv(jm->parentmgr, pri, 0, newmsg, ap); - } else { - struct runtime_syslog_attr attr = { g_my_label, g_my_label, jm->name, pri, getuid(), getpid(), getpid() }; - - runtime_vsyslog(&attr, newmsg, ap); - } -} - -void -semaphoreitem_ignore(job_t j, struct semaphoreitem *si) -{ - if (si->fd != -1) { - job_log(j, LOG_DEBUG, "Ignoring Vnode: %d", si->fd); - job_assumes(j, kevent_mod(si->fd, EVFILT_VNODE, EV_DELETE, 0, 0, NULL) != -1); - } -} - -void -semaphoreitem_watch(job_t j, struct semaphoreitem *si) -{ - char *parentdir, tmp_path[PATH_MAX]; - int saved_errno = 0; - int fflags = NOTE_DELETE|NOTE_RENAME; - - switch (si->why) { - case DIR_NOT_EMPTY: - case PATH_CHANGES: - fflags |= NOTE_ATTRIB|NOTE_LINK; - /* fall through */ - case PATH_EXISTS: - fflags |= NOTE_REVOKE|NOTE_EXTEND|NOTE_WRITE; - /* fall through */ - case PATH_MISSING: - break; - default: - return; - } - - /* dirname() may modify tmp_path */ - strlcpy(tmp_path, si->what, sizeof(tmp_path)); - - if (!job_assumes(j, (parentdir = dirname(tmp_path)))) { - return; - } - - /* See 5321044 for why we do the do-while loop and 5415523 for why ENOENT is checked */ - do { - if (si->fd == -1) { - struct stat sb; - if( stat(si->what, &sb) == 0 ) { - /* If we're watching a character or block device, only watch the parent directory. - * See rdar://problem/6489900 for the gory details. Basically, holding an open file - * descriptor to a devnode could end up (a) blocking us on open(2) until someone else - * open(2)s the file (like a character device that waits for a carrier signal) or - * (b) preventing other processes from obtaining an exclusive lock on the file, even - * though we're opening it with O_EVTONLY. - * - * The main point of contention is that O_EVTONLY doesn't actually mean "event only". - * It means "Don't prevent unmounts of this descriptor's volume". We work around this - * for dev nodes by only watching the parent directory and stat(2)ing our desired file - * each time the parent changes to see if it appeared or disappeared. - */ - if( S_ISREG(sb.st_mode) || S_ISDIR(sb.st_mode) ) { - si->fd = _fd(open(si->what, O_EVTONLY | O_NOCTTY | O_NONBLOCK)); - } - } - - if( si->fd == -1 ) { - si->watching_parent = job_assumes(j, (si->fd = _fd(open(parentdir, O_EVTONLY | O_NOCTTY | O_NONBLOCK))) != -1); - } else { - si->watching_parent = false; - } - } - - if (si->fd == -1) { - return job_log_error(j, LOG_ERR, "Path monitoring failed on \"%s\"", si->what); - } - - job_log(j, LOG_DEBUG, "Watching %svnode (%s): %d", si->watching_parent ? "parent ": "", si->what, si->fd); - - if (kevent_mod(si->fd, EVFILT_VNODE, EV_ADD, fflags, 0, j) == -1) { - saved_errno = errno; - /* - * The FD can be revoked between the open() and kevent(). - * This is similar to the inability for kevents to be - * attached to short lived zombie processes after fork() - * but before kevent(). - */ - job_assumes(j, runtime_close(si->fd) == 0); - si->fd = -1; - } - } while (unlikely((si->fd == -1) && (saved_errno == ENOENT))); - - if (saved_errno == ENOTSUP) { - /* - * 3524219 NFS needs kqueue support - * 4124079 VFS needs generic kqueue support - * 5226811 EVFILT: Launchd EVFILT_VNODE doesn't work on /dev - */ - job_log(j, LOG_DEBUG, "Falling back to polling for path: %s", si->what); - - if (!j->poll_for_vfs_changes) { - j->poll_for_vfs_changes = true; - job_assumes(j, kevent_mod((uintptr_t)&j->semaphores, EVFILT_TIMER, EV_ADD, NOTE_SECONDS, 3, j) != -1); - } - } -} - -void -semaphoreitem_callback(job_t j, struct kevent *kev) -{ - char invalidation_reason[100] = ""; - struct semaphoreitem *si; - - SLIST_FOREACH(si, &j->semaphores, sle) { - switch (si->why) { - case PATH_CHANGES: - case PATH_EXISTS: - case PATH_MISSING: - case DIR_NOT_EMPTY: - job_log(j, LOG_DEBUG, "P%s changed (%u): %s", si->watching_parent ? "arent path" : "ath", si->why, si->what); - break; - default: - continue; - } - - if (si->fd == (int)kev->ident) { - break; - } - } - - if (!job_assumes(j, si != NULL)) { - return; - } - - if (NOTE_DELETE & kev->fflags) { - strcat(invalidation_reason, "deleted"); - } - - if (NOTE_RENAME & kev->fflags) { - if (invalidation_reason[0]) { - strcat(invalidation_reason, "/renamed"); - } else { - strcat(invalidation_reason, "renamed"); - } - } - - if (NOTE_REVOKE & kev->fflags) { - if (invalidation_reason[0]) { - strcat(invalidation_reason, "/revoked"); - } else { - strcat(invalidation_reason, "revoked"); - } - } - - if (invalidation_reason[0]) { - job_log(j, LOG_DEBUG, "Path %s: %s", invalidation_reason, si->what); - job_assumes(j, runtime_close(si->fd) == 0); - si->fd = -1; /* this will get fixed in semaphoreitem_watch() */ - } - - if( !si->watching_parent ) { - if (si->why == PATH_CHANGES) { - j->start_pending = true; - } else { - semaphoreitem_watch(j, si); - } - } else { /* Something happened to the parent directory. See if our target file appeared. */ - if( !invalidation_reason[0] ) { - job_assumes(j, runtime_close(si->fd) == 0); - si->fd = -1; /* this will get fixed in semaphoreitem_watch() */ - semaphoreitem_watch(j, si); - } - /* Need to think about what should happen if the parent directory goes invalid. */ - } - - job_dispatch(j, false); -} - -struct cal_dict_walk { - job_t j; - struct tm tmptm; -}; - -void -calendarinterval_new_from_obj_dict_walk(launch_data_t obj, const char *key, void *context) -{ - struct cal_dict_walk *cdw = context; - struct tm *tmptm = &cdw->tmptm; - job_t j = cdw->j; - int64_t val; - - if (unlikely(LAUNCH_DATA_INTEGER != launch_data_get_type(obj))) { - /* hack to let caller know something went wrong */ - tmptm->tm_sec = -1; - return; - } - - val = launch_data_get_integer(obj); - - if (val < 0) { - job_log(j, LOG_WARNING, "The interval for key \"%s\" is less than zero.", key); - } else if (strcasecmp(key, LAUNCH_JOBKEY_CAL_MINUTE) == 0) { - if( val > 59 ) { - job_log(j, LOG_WARNING, "The interval for key \"%s\" is not between 0 and 59 (inclusive).", key); - tmptm->tm_sec = -1; - } else { - tmptm->tm_min = (typeof(tmptm->tm_min)) val; - } - } else if (strcasecmp(key, LAUNCH_JOBKEY_CAL_HOUR) == 0) { - if( val > 23 ) { - job_log(j, LOG_WARNING, "The interval for key \"%s\" is not between 0 and 23 (inclusive).", key); - tmptm->tm_sec = -1; - } else { - tmptm->tm_hour = (typeof(tmptm->tm_hour)) val; - } - } else if (strcasecmp(key, LAUNCH_JOBKEY_CAL_DAY) == 0) { - if( val < 1 || val > 31 ) { - job_log(j, LOG_WARNING, "The interval for key \"%s\" is not between 1 and 31 (inclusive).", key); - tmptm->tm_sec = -1; - } else { - tmptm->tm_mday = (typeof(tmptm->tm_mday)) val; - } - } else if (strcasecmp(key, LAUNCH_JOBKEY_CAL_WEEKDAY) == 0) { - if( val > 7 ) { - job_log(j, LOG_WARNING, "The interval for key \"%s\" is not between 0 and 7 (inclusive).", key); - tmptm->tm_sec = -1; - } else { - tmptm->tm_wday = (typeof(tmptm->tm_wday)) val; - } - } else if (strcasecmp(key, LAUNCH_JOBKEY_CAL_MONTH) == 0) { - if( val > 12 ) { - job_log(j, LOG_WARNING, "The interval for key \"%s\" is not between 0 and 12 (inclusive).", key); - tmptm->tm_sec = -1; - } else { - tmptm->tm_mon = (typeof(tmptm->tm_mon)) val; - tmptm->tm_mon -= 1; /* 4798263 cron compatibility */ - } - } -} - -bool -calendarinterval_new_from_obj(job_t j, launch_data_t obj) -{ - struct cal_dict_walk cdw; - - cdw.j = j; - memset(&cdw.tmptm, 0, sizeof(0)); - - cdw.tmptm.tm_min = -1; - cdw.tmptm.tm_hour = -1; - cdw.tmptm.tm_mday = -1; - cdw.tmptm.tm_wday = -1; - cdw.tmptm.tm_mon = -1; - - if (!job_assumes(j, obj != NULL)) { - return false; - } - - if (unlikely(LAUNCH_DATA_DICTIONARY != launch_data_get_type(obj))) { - return false; - } - - launch_data_dict_iterate(obj, calendarinterval_new_from_obj_dict_walk, &cdw); - - if (unlikely(cdw.tmptm.tm_sec == -1)) { - return false; - } - - return calendarinterval_new(j, &cdw.tmptm); -} - -bool -calendarinterval_new(job_t j, struct tm *w) -{ - struct calendarinterval *ci = calloc(1, sizeof(struct calendarinterval)); - - if (!job_assumes(j, ci != NULL)) { - return false; - } - - ci->when = *w; - ci->job = j; - - SLIST_INSERT_HEAD(&j->cal_intervals, ci, sle); - - calendarinterval_setalarm(j, ci); - - runtime_add_weak_ref(); - - return true; -} - -void -calendarinterval_delete(job_t j, struct calendarinterval *ci) -{ - SLIST_REMOVE(&j->cal_intervals, ci, calendarinterval, sle); - LIST_REMOVE(ci, global_sle); - - free(ci); - - runtime_del_weak_ref(); -} - -void -calendarinterval_sanity_check(void) -{ - struct calendarinterval *ci = LIST_FIRST(&sorted_calendar_events); - time_t now = time(NULL); - - if (unlikely(ci && (ci->when_next < now))) { - jobmgr_assumes(root_jobmgr, raise(SIGUSR1) != -1); - } -} - -void -calendarinterval_callback(void) -{ - struct calendarinterval *ci, *ci_next; - time_t now = time(NULL); - - LIST_FOREACH_SAFE(ci, &sorted_calendar_events, global_sle, ci_next) { - job_t j = ci->job; - - if (ci->when_next > now) { - break; - } - - LIST_REMOVE(ci, global_sle); - calendarinterval_setalarm(j, ci); - - j->start_pending = true; - job_dispatch(j, false); - } -} - -bool -socketgroup_new(job_t j, const char *name, int *fds, size_t fd_cnt, bool junkfds) -{ - struct socketgroup *sg = calloc(1, sizeof(struct socketgroup) + strlen(name) + 1); - - if (!job_assumes(j, sg != NULL)) { - return false; - } - - sg->fds = calloc(1, fd_cnt * sizeof(int)); - sg->fd_cnt = fd_cnt; - sg->junkfds = junkfds; - - if (!job_assumes(j, sg->fds != NULL)) { - free(sg); - return false; - } - - memcpy(sg->fds, fds, fd_cnt * sizeof(int)); - strcpy(sg->name_init, name); - - SLIST_INSERT_HEAD(&j->sockets, sg, sle); - - runtime_add_weak_ref(); - - return true; -} - -void -socketgroup_delete(job_t j, struct socketgroup *sg) -{ - unsigned int i; - - for (i = 0; i < sg->fd_cnt; i++) { -#if 0 - struct sockaddr_storage ss; - struct sockaddr_un *sun = (struct sockaddr_un *)&ss; - socklen_t ss_len = sizeof(ss); - - /* 5480306 */ - if (job_assumes(j, getsockname(sg->fds[i], (struct sockaddr *)&ss, &ss_len) != -1) - && job_assumes(j, ss_len > 0) && (ss.ss_family == AF_UNIX)) { - job_assumes(j, unlink(sun->sun_path) != -1); - /* We might conditionally need to delete a directory here */ - } -#endif - job_assumes(j, runtime_close(sg->fds[i]) != -1); - } - - SLIST_REMOVE(&j->sockets, sg, socketgroup, sle); - - free(sg->fds); - free(sg); - - runtime_del_weak_ref(); -} - -void -socketgroup_kevent_mod(job_t j, struct socketgroup *sg, bool do_add) -{ - struct kevent kev[sg->fd_cnt]; - char buf[10000]; - unsigned int i, buf_off = 0; - - if (unlikely(sg->junkfds)) { - return; - } - - for (i = 0; i < sg->fd_cnt; i++) { - EV_SET(&kev[i], sg->fds[i], EVFILT_READ, do_add ? EV_ADD : EV_DELETE, 0, 0, j); - buf_off += snprintf(buf + buf_off, sizeof(buf) - buf_off, " %d", sg->fds[i]); - } - - job_log(j, LOG_DEBUG, "%s Sockets:%s", do_add ? "Watching" : "Ignoring", buf); - - job_assumes(j, kevent_bulk_mod(kev, sg->fd_cnt) != -1); - - for (i = 0; i < sg->fd_cnt; i++) { - job_assumes(j, kev[i].flags & EV_ERROR); - errno = (typeof(errno)) kev[i].data; - job_assumes(j, kev[i].data == 0); - } -} - -void -socketgroup_ignore(job_t j, struct socketgroup *sg) -{ - socketgroup_kevent_mod(j, sg, false); -} - -void -socketgroup_watch(job_t j, struct socketgroup *sg) -{ - socketgroup_kevent_mod(j, sg, true); -} - -void -socketgroup_callback(job_t j) -{ - job_dispatch(j, true); -} - -bool -envitem_new(job_t j, const char *k, const char *v, bool global, bool one_shot) -{ - struct envitem *ei = calloc(1, sizeof(struct envitem) + strlen(k) + 1 + strlen(v) + 1); - - if (!job_assumes(j, ei != NULL)) { - return false; - } - - strcpy(ei->key_init, k); - ei->value = ei->key_init + strlen(k) + 1; - strcpy(ei->value, v); - ei->one_shot = one_shot; - - if (global) { - if (SLIST_EMPTY(&j->global_env)) { - LIST_INSERT_HEAD(&j->mgr->global_env_jobs, j, global_env_sle); - } - SLIST_INSERT_HEAD(&j->global_env, ei, sle); - } else { - SLIST_INSERT_HEAD(&j->env, ei, sle); - } - - job_log(j, LOG_DEBUG, "Added environmental variable: %s=%s", k, v); - - return true; -} - -void -envitem_delete(job_t j, struct envitem *ei, bool global) -{ - if (global) { - SLIST_REMOVE(&j->global_env, ei, envitem, sle); - if (SLIST_EMPTY(&j->global_env)) { - LIST_REMOVE(j, global_env_sle); - } - } else { - SLIST_REMOVE(&j->env, ei, envitem, sle); - } - - free(ei); -} - -void -envitem_setup(launch_data_t obj, const char *key, void *context) -{ - job_t j = context; - - if (launch_data_get_type(obj) != LAUNCH_DATA_STRING) { - return; - } - - if( strncmp(LAUNCHD_TRUSTED_FD_ENV, key, sizeof(LAUNCHD_TRUSTED_FD_ENV) - 1) != 0 ) { - envitem_new(j, key, launch_data_get_string(obj), j->importing_global_env, false); - } else { - job_log(j, LOG_DEBUG, "Ignoring reserved environmental variable: %s", key); - } -} - -void -envitem_setup_one_shot(launch_data_t obj, const char *key, void *context) -{ - job_t j = context; - - if (launch_data_get_type(obj) != LAUNCH_DATA_STRING) { - return; - } - - if( strncmp(LAUNCHD_TRUSTED_FD_ENV, key, sizeof(LAUNCHD_TRUSTED_FD_ENV) - 1) != 0 ) { - envitem_new(j, key, launch_data_get_string(obj), j->importing_global_env, true); - } else { - job_log(j, LOG_DEBUG, "Ignoring reserved environmental variable: %s", key); - } -} - -bool -limititem_update(job_t j, int w, rlim_t r) -{ - struct limititem *li; - - SLIST_FOREACH(li, &j->limits, sle) { - if (li->which == w) { - break; - } - } - - if (li == NULL) { - li = calloc(1, sizeof(struct limititem)); - - if (!job_assumes(j, li != NULL)) { - return false; - } - - SLIST_INSERT_HEAD(&j->limits, li, sle); - - li->which = w; - } - - if (j->importing_hard_limits) { - li->lim.rlim_max = r; - li->sethard = true; - } else { - li->lim.rlim_cur = r; - li->setsoft = true; - } - - return true; -} - -void -limititem_delete(job_t j, struct limititem *li) -{ - SLIST_REMOVE(&j->limits, li, limititem, sle); - - free(li); -} - -#if HAVE_SANDBOX -void -seatbelt_setup_flags(launch_data_t obj, const char *key, void *context) -{ - job_t j = context; - - if (launch_data_get_type(obj) != LAUNCH_DATA_BOOL) { - job_log(j, LOG_WARNING, "Sandbox flag value must be boolean: %s", key); - return; - } - - if (launch_data_get_bool(obj) == false) { - return; - } - - if (strcasecmp(key, LAUNCH_JOBKEY_SANDBOX_NAMED) == 0) { - j->seatbelt_flags |= SANDBOX_NAMED; - } -} -#endif - -void -limititem_setup(launch_data_t obj, const char *key, void *context) -{ - job_t j = context; - size_t i, limits_cnt = (sizeof(launchd_keys2limits) / sizeof(launchd_keys2limits[0])); - rlim_t rl; - - if (launch_data_get_type(obj) != LAUNCH_DATA_INTEGER) { - return; - } - - rl = launch_data_get_integer(obj); - - for (i = 0; i < limits_cnt; i++) { - if (strcasecmp(launchd_keys2limits[i].key, key) == 0) { - break; - } - } - - if (i == limits_cnt) { - return; - } - - limititem_update(j, launchd_keys2limits[i].val, rl); -} - -bool -job_useless(job_t j) -{ - if ((j->legacy_LS_job || j->only_once) && j->start_time != 0) { - if (j->legacy_LS_job && j->j_port) { - return false; - } - job_log(j, LOG_INFO, "Exited. Was only configured to run once."); - return true; - } else if (j->removal_pending) { - job_log(j, LOG_DEBUG, "Exited while removal was pending."); - return true; - } else if (j->mgr->shutting_down && (j->hopefully_exits_first || j->mgr->hopefully_first_cnt == 0)) { - job_log(j, LOG_DEBUG, "Exited while shutdown in progress. Processes remaining: %lu/%lu", total_children, total_anon_children); - if( total_children == 0 && !j->anonymous ) { - job_log(j, LOG_DEBUG | LOG_CONSOLE, "Job was last (non-anonymous) to exit during %s shutdown.", (pid1_magic && j->mgr == root_jobmgr) ? "system" : "job manager"); - } else if( total_anon_children == 0 && j->anonymous ) { - job_log(j, LOG_DEBUG | LOG_CONSOLE, "Job was last (anonymous) to exit during %s shutdown.", (pid1_magic && j->mgr == root_jobmgr) ? "system" : "job manager"); - } - return true; - } else if (j->legacy_mach_job) { - if (SLIST_EMPTY(&j->machservices)) { - job_log(j, LOG_INFO, "Garbage collecting"); - return true; - } else if (!j->checkedin) { - job_log(j, LOG_WARNING, "Failed to check-in!"); - return true; - } - } - - return false; -} - -bool -job_keepalive(job_t j) -{ - mach_msg_type_number_t statusCnt; - mach_port_status_t status; - struct semaphoreitem *si; - struct machservice *ms; - struct stat sb; - bool good_exit = (WIFEXITED(j->last_exit_status) && WEXITSTATUS(j->last_exit_status) == 0); - bool is_not_kextd = (do_apple_internal_logging || (strcmp(j->label, "com.apple.kextd") != 0)); - - if (unlikely(j->mgr->shutting_down)) { - return false; - } - - /* - * 5066316 - * - * We definitely need to revisit this after Leopard ships. Please see - * launchctl.c for the other half of this hack. - */ - if (unlikely((j->mgr->global_on_demand_cnt > 0) && is_not_kextd)) { - return false; - } - - if( unlikely(j->needs_kickoff) ) { - job_log(j, LOG_DEBUG, "KeepAlive check: Job needs to be kicked off on-demand before KeepAlive sets in."); - return false; - } - - if (j->start_pending) { - job_log(j, LOG_DEBUG, "KeepAlive check: Pent-up non-IPC launch criteria."); - return true; - } - - if (!j->ondemand) { - job_log(j, LOG_DEBUG, "KeepAlive check: job configured to run continuously."); - return true; - } - - SLIST_FOREACH(ms, &j->machservices, sle) { - statusCnt = MACH_PORT_RECEIVE_STATUS_COUNT; - if (mach_port_get_attributes(mach_task_self(), ms->port, MACH_PORT_RECEIVE_STATUS, - (mach_port_info_t)&status, &statusCnt) != KERN_SUCCESS) { - continue; - } - if (status.mps_msgcount) { - job_log(j, LOG_DEBUG, "KeepAlive check: %d queued Mach messages on service: %s", - status.mps_msgcount, ms->name); - return true; - } - } - - - SLIST_FOREACH(si, &j->semaphores, sle) { - bool wanted_state = false; - int qdir_file_cnt; - job_t other_j; - - switch (si->why) { - case NETWORK_UP: - wanted_state = true; - case NETWORK_DOWN: - if (network_up == wanted_state) { - job_log(j, LOG_DEBUG, "KeepAlive: The network is %s.", wanted_state ? "up" : "down"); - return true; - } - break; - case SUCCESSFUL_EXIT: - wanted_state = true; - case FAILED_EXIT: - if (good_exit == wanted_state) { - job_log(j, LOG_DEBUG, "KeepAlive: The exit state was %s.", wanted_state ? "successful" : "failure"); - return true; - } - break; - case OTHER_JOB_ENABLED: - wanted_state = true; - case OTHER_JOB_DISABLED: - if ((bool)job_find(si->what) == wanted_state) { - job_log(j, LOG_DEBUG, "KeepAlive: The following job is %s: %s", wanted_state ? "enabled" : "disabled", si->what); - return true; - } - break; - case OTHER_JOB_ACTIVE: - wanted_state = true; - case OTHER_JOB_INACTIVE: - if ((other_j = job_find(si->what))) { - if ((bool)other_j->p == wanted_state) { - job_log(j, LOG_DEBUG, "KeepAlive: The following job is %s: %s", wanted_state ? "active" : "inactive", si->what); - return true; - } - } - break; - case PATH_EXISTS: - wanted_state = true; - case PATH_MISSING: - if ((bool)(stat(si->what, &sb) == 0) == wanted_state) { - job_log(j, LOG_DEBUG, "KeepAlive: The following path %s: %s", wanted_state ? "exists" : "is missing", si->what); - return true; - } else { - if( wanted_state ) { /* File is not there but we wish it was. */ - if( si->fd != -1 && !si->watching_parent ) { /* Need to be watching the parent now. */ - job_assumes(j, runtime_close(si->fd) == 0); - si->fd = -1; - semaphoreitem_watch(j, si); - } - } else { /* File is there but we wish it wasn't. */ - if( si->fd != -1 && si->watching_parent ) { /* Need to watch the file now. */ - job_assumes(j, runtime_close(si->fd) == 0); - si->fd = -1; - semaphoreitem_watch(j, si); - } - } - } - break; - case PATH_CHANGES: - break; - case DIR_NOT_EMPTY: - if (-1 == (qdir_file_cnt = dir_has_files(j, si->what))) { - job_log_error(j, LOG_ERR, "Failed to count the number of files in \"%s\"", si->what); - } else if (qdir_file_cnt > 0) { - job_log(j, LOG_DEBUG, "KeepAlive: Directory is not empty: %s", si->what); - return true; - } - break; - } - } - - return false; -} - -const char * -job_active(job_t j) -{ - struct machservice *ms; - if (j->p) { - return "PID is still valid"; - } - - if (j->mgr->shutting_down && j->log_redirect_fd) { - job_assumes(j, runtime_close(j->log_redirect_fd) != -1); - j->log_redirect_fd = 0; - } - - if (j->log_redirect_fd) { - if (job_assumes(j, j->legacy_LS_job)) { - return "Standard out/error is still valid"; - } else { - job_assumes(j, runtime_close(j->log_redirect_fd) != -1); - j->log_redirect_fd = 0; - } - } - - if (j->priv_port_has_senders) { - return "Privileged Port still has outstanding senders"; - } - - SLIST_FOREACH(ms, &j->machservices, sle) { - if (ms->recv && machservice_active(ms)) { - return "Mach service is still active"; - } - } - - return NULL; -} - -void -machservice_watch(job_t j, struct machservice *ms) -{ - if (ms->recv) { - job_assumes(j, runtime_add_mport(ms->port, NULL, 0) == KERN_SUCCESS); - } -} - -void -machservice_ignore(job_t j, struct machservice *ms) -{ - job_assumes(j, runtime_remove_mport(ms->port) == KERN_SUCCESS); -} - -void -machservice_resetport(job_t j, struct machservice *ms) -{ - LIST_REMOVE(ms, port_hash_sle); - job_assumes(j, launchd_mport_close_recv(ms->port) == KERN_SUCCESS); - job_assumes(j, launchd_mport_deallocate(ms->port) == KERN_SUCCESS); - ms->gen_num++; - job_assumes(j, launchd_mport_create_recv(&ms->port) == KERN_SUCCESS); - job_assumes(j, launchd_mport_make_send(ms->port) == KERN_SUCCESS); - LIST_INSERT_HEAD(&port_hash[HASH_PORT(ms->port)], ms, port_hash_sle); -} - -struct machservice * -machservice_new(job_t j, const char *name, mach_port_t *serviceport, bool pid_local) -{ - struct machservice *ms = calloc(1, sizeof(struct machservice) + strlen(name) + 1); - - if (!job_assumes(j, ms != NULL)) { - return NULL; - } - - strcpy((char *)ms->name, name); - ms->job = j; - ms->gen_num = 1; - ms->per_pid = pid_local; - - if (likely(*serviceport == MACH_PORT_NULL)) { - if (!job_assumes(j, launchd_mport_create_recv(&ms->port) == KERN_SUCCESS)) { - goto out_bad; - } - - if (!job_assumes(j, launchd_mport_make_send(ms->port) == KERN_SUCCESS)) { - goto out_bad2; - } - *serviceport = ms->port; - ms->recv = true; - } else { - ms->port = *serviceport; - ms->isActive = true; - } - - SLIST_INSERT_HEAD(&j->machservices, ms, sle); - - jobmgr_t jm_to_insert = j->mgr; - if( g_flat_mach_namespace ) { - jm_to_insert = (j->mgr->properties & BOOTSTRAP_PROPERTY_EXPLICITSUBSET) ? j->mgr : root_jobmgr; - } - - LIST_INSERT_HEAD(&jm_to_insert->ms_hash[hash_ms(ms->name)], ms, name_hash_sle); - LIST_INSERT_HEAD(&port_hash[HASH_PORT(ms->port)], ms, port_hash_sle); - - job_log(j, LOG_DEBUG, "Mach service added%s: %s", (j->mgr->properties & BOOTSTRAP_PROPERTY_EXPLICITSUBSET) ? " to private namespace" : "", name); - - return ms; -out_bad2: - job_assumes(j, launchd_mport_close_recv(ms->port) == KERN_SUCCESS); -out_bad: - free(ms); - return NULL; -} - -bootstrap_status_t -machservice_status(struct machservice *ms) -{ - if (ms->isActive) { - return BOOTSTRAP_STATUS_ACTIVE; - } else if (ms->job->ondemand) { - return BOOTSTRAP_STATUS_ON_DEMAND; - } else { - return BOOTSTRAP_STATUS_INACTIVE; - } -} - -void -job_setup_exception_port(job_t j, task_t target_task) -{ - struct machservice *ms; - thread_state_flavor_t f = 0; - mach_port_t exc_port = the_exception_server; - - if (unlikely(j->alt_exc_handler)) { - ms = jobmgr_lookup_service(j->mgr, j->alt_exc_handler, true, 0); - if (likely(ms)) { - exc_port = machservice_port(ms); - } else { - job_log(j, LOG_WARNING, "Falling back to default Mach exception handler. Could not find: %s", j->alt_exc_handler); - } - } else if (unlikely(j->internal_exc_handler)) { - exc_port = runtime_get_kernel_port(); - } else if (unlikely(!exc_port)) { - return; - } - -#if defined (__ppc__) || defined(__ppc64__) - f = PPC_THREAD_STATE64; -#elif defined(__i386__) || defined(__x86_64__) - f = x86_THREAD_STATE; -#elif defined(__arm__) - f = ARM_THREAD_STATE; -#else -#error "unknown architecture" -#endif - - if (likely(target_task)) { - job_assumes(j, task_set_exception_ports(target_task, EXC_MASK_CRASH, exc_port, EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES, f) == KERN_SUCCESS); - } else if (pid1_magic && the_exception_server) { - mach_port_t mhp = mach_host_self(); - job_assumes(j, host_set_exception_ports(mhp, EXC_MASK_CRASH, the_exception_server, EXCEPTION_STATE_IDENTITY | MACH_EXCEPTION_CODES, f) == KERN_SUCCESS); - job_assumes(j, launchd_mport_deallocate(mhp) == KERN_SUCCESS); - } -} - -void -job_set_exception_port(job_t j, mach_port_t port) -{ - if (unlikely(!the_exception_server)) { - the_exception_server = port; - job_setup_exception_port(j, 0); - } else { - job_log(j, LOG_WARNING, "The exception server is already claimed!"); - } -} - -void -machservice_setup_options(launch_data_t obj, const char *key, void *context) -{ - struct machservice *ms = context; - mach_port_t mhp = mach_host_self(); - int which_port; - bool b; - - if (!job_assumes(ms->job, mhp != MACH_PORT_NULL)) { - return; - } - - switch (launch_data_get_type(obj)) { - case LAUNCH_DATA_INTEGER: - which_port = (int)launch_data_get_integer(obj); /* XXX we should bound check this... */ - if (strcasecmp(key, LAUNCH_JOBKEY_MACH_TASKSPECIALPORT) == 0) { - switch (which_port) { - case TASK_KERNEL_PORT: - case TASK_HOST_PORT: - case TASK_NAME_PORT: - case TASK_BOOTSTRAP_PORT: - /* I find it a little odd that zero isn't reserved in the header. - * Normally Mach is fairly good about this convention... */ - case 0: - job_log(ms->job, LOG_WARNING, "Tried to set a reserved task special port: %d", which_port); - break; - default: - ms->special_port_num = which_port; - SLIST_INSERT_HEAD(&special_ports, ms, special_port_sle); - break; - } - } else if (strcasecmp(key, LAUNCH_JOBKEY_MACH_HOSTSPECIALPORT) == 0 && pid1_magic) { - if (which_port > HOST_MAX_SPECIAL_KERNEL_PORT) { - job_assumes(ms->job, (errno = host_set_special_port(mhp, which_port, ms->port)) == KERN_SUCCESS); - } else { - job_log(ms->job, LOG_WARNING, "Tried to set a reserved host special port: %d", which_port); - } - } - case LAUNCH_DATA_BOOL: - b = launch_data_get_bool(obj); - if (strcasecmp(key, LAUNCH_JOBKEY_MACH_ENTERKERNELDEBUGGERONCLOSE) == 0) { - ms->debug_on_close = b; - } else if (strcasecmp(key, LAUNCH_JOBKEY_MACH_RESETATCLOSE) == 0) { - ms->reset = b; - } else if (strcasecmp(key, LAUNCH_JOBKEY_MACH_HIDEUNTILCHECKIN) == 0) { - ms->hide = b; - } else if (strcasecmp(key, LAUNCH_JOBKEY_MACH_EXCEPTIONSERVER) == 0) { - job_set_exception_port(ms->job, ms->port); - } else if (strcasecmp(key, LAUNCH_JOBKEY_MACH_KUNCSERVER) == 0) { - ms->kUNCServer = b; - job_assumes(ms->job, host_set_UNDServer(mhp, ms->port) == KERN_SUCCESS); - } - break; - case LAUNCH_DATA_STRING: - if( strcasecmp(key, LAUNCH_JOBKEY_MACH_DRAINMESSAGESONCRASH) == 0 ) { - const char *option = launch_data_get_string(obj); - if( strcasecmp(option, "One") == 0 ) { - ms->drain_one_on_crash = true; - } else if( strcasecmp(option, "All") == 0 ) { - ms->drain_all_on_crash = true; - } - } - break; - case LAUNCH_DATA_DICTIONARY: - job_set_exception_port(ms->job, ms->port); - break; - default: - break; - } - - job_assumes(ms->job, launchd_mport_deallocate(mhp) == KERN_SUCCESS); -} - -void -machservice_setup(launch_data_t obj, const char *key, void *context) -{ - job_t j = context; - struct machservice *ms; - mach_port_t p = MACH_PORT_NULL; - - if (unlikely(ms = jobmgr_lookup_service(j->mgr, key, false, 0))) { - job_log(j, LOG_WARNING, "Conflict with job: %s over Mach service: %s", ms->job->label, key); - return; - } - - if (!job_assumes(j, (ms = machservice_new(j, key, &p, false)) != NULL)) { - return; - } - - ms->isActive = false; - - if (launch_data_get_type(obj) == LAUNCH_DATA_DICTIONARY) { - launch_data_dict_iterate(obj, machservice_setup_options, ms); - } -} - -jobmgr_t -jobmgr_do_garbage_collection(jobmgr_t jm) -{ - jobmgr_t jmi = NULL, jmn = NULL; - SLIST_FOREACH_SAFE(jmi, &jm->submgrs, sle, jmn) { - jobmgr_do_garbage_collection(jmi); - } - - if( !jm->shutting_down ) { - return jm; - } - - if( SLIST_EMPTY(&jm->submgrs) ) { - jobmgr_log(jm, LOG_DEBUG, "No submanagers left."); - } else { - jobmgr_log(jm, LOG_DEBUG, "Still have submanagers."); - } - - int phase = -1; - for( phase = jm->shutdown_phase; phase < JOBMGR_PHASE_LAST; phase++ ) { - if( phase == JOBMGR_PHASE_HOPEFULLY_EXITS_LAST ) { - if( jm == root_jobmgr ) { - simulate_pid1_crash(); - } - - if( jm == root_jobmgr && pid1_magic && !jm->killed_stray_jobs ) { - jobmgr_log_stray_children(jm, true); - jm->killed_stray_jobs = true; - } - } - - uint32_t unkilled_cnt = 0; - job_t ji = NULL, jn = NULL; - LIST_FOREACH_SAFE( ji, &jm->jobs, sle, jn ) { - if( phase == JOBMGR_PHASE_HOPEFULLY_EXITS_FIRST && !ji->hopefully_exits_first ) { - continue; - } else if( phase == JOBMGR_PHASE_NORMAL ) { - if( ji->holds_ref ) { - /* If we're shutting down, release the hold holds_ref jobs - * have on us. - */ - job_remove(ji); - } - - if( ji->hopefully_exits_first || ji->hopefully_exits_last ) { - continue; - } - } else if( phase == JOBMGR_PHASE_HOPEFULLY_EXITS_LAST && !ji->hopefully_exits_last ) { - continue; - } - - if( ji->anonymous ) { - continue; - } - - const char *active = job_active(ji); - if( !active ) { - job_log(ji, LOG_DEBUG, "Job is inactive. Removing."); - job_remove(ji); - } else { - if( ji->p ) { - if( !ji->stopped ) { - job_log(ji, LOG_DEBUG, "Stopping job."); - job_stop(ji); - unkilled_cnt++; - } else { - if( ji->clean_kill ) { - job_log(ji, LOG_DEBUG, "Job was clean and sent SIGKILL."); - if( !ji->clean_exit_timer_expired ) { - /* Give jobs that were clean and sent SIGKILL 1 second to exit after receipt. */ - unkilled_cnt++; - } else { - job_log(ji, LOG_ERR, "Job was clean, killed and has not exited after 1 second. Moving on."); - } - } else { - job_log(ji, LOG_DEBUG, "Job was sent SIGTERM%s.", ji->sent_sigkill ? " and SIGKILL" : ""); - unkilled_cnt += !ji->sent_sigkill; - } - } - } else { - job_log(ji, LOG_DEBUG, "Job is active: %s", active); - } - } - } /* LIST_FOREACH_SAFE */ - - if( unkilled_cnt == 0 ) { - jobmgr_log(jm, LOG_DEBUG, "Done with the %s bucket, advancing.", s_phases[jm->shutdown_phase]); - jm->shutdown_phase++; - } else { - jobmgr_log(jm, LOG_DEBUG, "Still %u unkilled job%s in %s bucket.", unkilled_cnt, unkilled_cnt > 1 ? "s" : "", s_phases[jm->shutdown_phase]); - phase = JOBMGR_PHASE_LAST; - } - } /* for */ - - jobmgr_t r = jm; - if( jm->shutdown_phase > JOBMGR_PHASE_HOPEFULLY_EXITS_LAST && SLIST_EMPTY(&jm->submgrs) ) { - jobmgr_log(jm, LOG_DEBUG, "Removing."); - jobmgr_log_stray_children(jm, false); - jobmgr_remove(jm); - r = NULL; - } - - return r; -} - -void -jobmgr_kill_stray_children(jobmgr_t jm, pid_t *p, size_t np) -{ -#if 1 - /* I maintain that stray processes should be at the mercy of launchd during shutdown, - * but nevertheless, things like diskimages-helper can stick around, and SIGKILLing - * them can result in data loss. So we send SIGTERM to all the strays and don't wait - * for them to exit before moving on. - * - * See rdar://problem/6562592 - */ - size_t i = 0; - for( i = 0; i < np; i++ ) { - if( p[i] != 0 ) { - jobmgr_log(jm, LOG_DEBUG | LOG_CONSOLE, "Sending SIGTERM to PID %u and continuing...", p[i]); - jobmgr_assumes(jm, runtime_kill(p[i], SIGTERM) != -1); - } - } -#else - struct timespec tts = { 2, 0 }; /* Wait 2 seconds for stray children to die after being SIGTERM'ed. */ - struct timespec kts = { 1, 0 }; /* Wait 1 second for stray children to die after being SIGKILL'ed. */ - uint64_t start, end, nanosec; - struct kevent kev; - int r, kq = kqueue(); - - if (!jobmgr_assumes(jm, kq != -1)) { - return; - } - - start = runtime_get_opaque_time(); - size_t i = 0, n2t = 0; - for( i = 0; i < np; i++ ) { - if( p[i] != 0 ) { - EV_SET(&kev, p[i], EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, 0); - - if( jobmgr_assumes(jm, kevent(kq, &kev, 1, NULL, 0, NULL) != -1) ) { - jobmgr_assumes(jm, runtime_kill(p[i], SIGTERM) != -1); - n2t++; - } else { - jobmgr_log(jm, LOG_DEBUG | LOG_CONSOLE, "Disregarding PID %u and continuing.", p[i]); - p[i] = 0; - } - } - } - - while( n2t > 0 && (r = kevent(kq, NULL, 0, &kev, 1, &tts)) ) { - int status = 0; - waitpid((pid_t)kev.ident, &status, WNOHANG); - - end = runtime_get_opaque_time(); - nanosec = runtime_opaque_time_to_nano(end - start); - jobmgr_log(jm, LOG_DEBUG | LOG_CONSOLE, "PID %u died after %llu nanoseconds.", (pid_t)kev.ident, nanosec); - - for( i = 0; i < np; i++ ) { - p[i] = ( p[i] == (pid_t)kev.ident ) ? 0 : p[i]; - } - } - - size_t n2k = 0; - for( i = 0; i < np; i++ ) { - if( p[i] != 0 ) { - jobmgr_assumes(jm, runtime_kill(p[i], SIGKILL) != -1); - n2k++; - } - } - - while( n2k > 0 && (r = kevent(kq, NULL, 0, &kev, 1, &kts)) ) { - int status = 0; - waitpid((pid_t)kev.ident, &status, WNOHANG); - - end = runtime_get_opaque_time(); - nanosec = runtime_opaque_time_to_nano(end - start); - jobmgr_log(jm, LOG_DEBUG | LOG_CONSOLE, "PID %u was killed and died after %llu nanoseconds.", (pid_t)kev.ident, nanosec); - - for( i = 0; i < np; i++ ) { - p[i] = ( p[i] == (pid_t)kev.ident ) ? 0 : p[i]; - } - } - - for( i = 0; i < np; i++ ) { - if( p[i] != 0 ) { - jobmgr_log(jm, LOG_NOTICE | LOG_CONSOLE, "PID %u did not die after being SIGKILL'ed 1 second ago.", p[i]); - } - } -#endif -} - -void -jobmgr_log_stray_children(jobmgr_t jm, bool kill_strays) -{ - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_ALL }; - size_t i, kp_cnt = 0, kp_skipped = 0, len = sizeof(struct kinfo_proc) * get_kern_max_proc(); - struct kinfo_proc *kp; - - if (likely(jm->parentmgr || !pid1_magic)) { - return; - } - - if (!jobmgr_assumes(jm, (kp = malloc(len)) != NULL)) { - return; - } - - runtime_ktrace0(RTKT_LAUNCHD_FINDING_ALL_STRAYS); - - if (!jobmgr_assumes(jm, sysctl(mib, 3, kp, &len, NULL, 0) != -1)) { - goto out; - } - - kp_cnt = len / sizeof(struct kinfo_proc); - pid_t *ps = (pid_t *)calloc(sizeof(pid_t), kp_cnt); - - for (i = 0; i < kp_cnt; i++) { - pid_t p_i = kp[i].kp_proc.p_pid; - pid_t pp_i = kp[i].kp_eproc.e_ppid; - pid_t pg_i = kp[i].kp_eproc.e_pgid; - const char *z = (kp[i].kp_proc.p_stat == SZOMB) ? "zombie " : ""; - const char *n = kp[i].kp_proc.p_comm; - - if (unlikely(p_i == 0 || p_i == 1)) { - kp_skipped++; - continue; - } - - /* We might have some jobs hanging around that we've decided to shut down in spite of. */ - job_t j = jobmgr_find_by_pid(jm, p_i, false); - if( !j || (j && j->anonymous) ) { - jobmgr_log(jm, LOG_INFO | LOG_CONSOLE, "Stray %s%s at shutdown: PID %u PPID %u PGID %u %s", z, j ? "anonymous job" : "process", p_i, pp_i, pg_i, n); - - int status = 0; - if( pp_i == getpid() && !jobmgr_assumes(jm, kp[i].kp_proc.p_stat != SZOMB) ) { - if( jobmgr_assumes(jm, waitpid(p_i, &status, WNOHANG) == 0) ) { - jobmgr_log(jm, LOG_INFO | LOG_CONSOLE, "Unreaped zombie stray exited with status %i.", WEXITSTATUS(status)); - } - kp_skipped++; - } else { - job_t leader = jobmgr_find_by_pid(jm, pg_i, false); - /* See rdar://problem/6745714. Some jobs have child processes that back kernel state, - * so we don't want to terminate them. Long-term, I'd really like to provide shutdown - * hints to the kernel along the way, so that it could shutdown certain subsystems when - * their userspace emissaries go away, before the call to reboot(2). - */ - if( leader && leader->ignore_pg_at_shutdown ) { - kp_skipped++; - } else { - ps[i] = p_i; - } - } - } else { - kp_skipped++; - } - } - - if( (kp_cnt - kp_skipped > 0) && kill_strays ) { - jobmgr_kill_stray_children(jm, ps, kp_cnt); - } - - free(ps); -out: - free(kp); -} - -jobmgr_t -jobmgr_parent(jobmgr_t jm) -{ - return jm->parentmgr; -} - -void -job_uncork_fork(job_t j) -{ - pid_t c = j->p; - - job_log(j, LOG_DEBUG, "Uncorking the fork()."); - /* this unblocks the child and avoids a race - * between the above fork() and the kevent_mod() */ - job_assumes(j, write(j->fork_fd, &c, sizeof(c)) == sizeof(c)); - job_assumes(j, runtime_close(j->fork_fd) != -1); - j->fork_fd = 0; -} - -jobmgr_t -jobmgr_new(jobmgr_t jm, mach_port_t requestorport, mach_port_t transfer_port, bool sflag, const char *name, bool no_init, mach_port_t session_port) -{ - mach_msg_size_t mxmsgsz; - job_t bootstrapper = NULL; - jobmgr_t jmr; - - launchd_assert(offsetof(struct jobmgr_s, kqjobmgr_callback) == 0); - - if (unlikely(jm && requestorport == MACH_PORT_NULL)) { - jobmgr_log(jm, LOG_ERR, "Mach sub-bootstrap create request requires a requester port"); - return NULL; - } - - jmr = calloc(1, sizeof(struct jobmgr_s) + (name ? (strlen(name) + 1) : NAME_MAX + 1)); - - if (!jobmgr_assumes(jm, jmr != NULL)) { - return NULL; - } - - jmr->kqjobmgr_callback = jobmgr_callback; - strcpy(jmr->name_init, name ? name : "Under construction"); - - jmr->req_port = requestorport; - - if ((jmr->parentmgr = jm)) { - SLIST_INSERT_HEAD(&jm->submgrs, jmr, sle); - } - - if (jm && !jobmgr_assumes(jmr, launchd_mport_notify_req(jmr->req_port, MACH_NOTIFY_DEAD_NAME) == KERN_SUCCESS)) { - goto out_bad; - } - - if (transfer_port != MACH_PORT_NULL) { - jobmgr_assumes(jmr, jm != NULL); - jmr->jm_port = transfer_port; - } else if (!jm && !pid1_magic) { - char *trusted_fd = getenv(LAUNCHD_TRUSTED_FD_ENV); - name_t service_buf; - - snprintf(service_buf, sizeof(service_buf), "com.apple.launchd.peruser.%u", getuid()); - - if (!jobmgr_assumes(jmr, bootstrap_check_in(bootstrap_port, service_buf, &jmr->jm_port) == 0)) { - goto out_bad; - } - - if (trusted_fd) { - int dfd, lfd = (int) strtol(trusted_fd, NULL, 10); - - if ((dfd = dup(lfd)) >= 0) { - jobmgr_assumes(jmr, runtime_close(dfd) != -1); - jobmgr_assumes(jmr, runtime_close(lfd) != -1); - } - - unsetenv(LAUNCHD_TRUSTED_FD_ENV); - } - - /* cut off the Libc cache, we don't want to deadlock against ourself */ - inherited_bootstrap_port = bootstrap_port; - bootstrap_port = MACH_PORT_NULL; - launchd_assert(launchd_mport_notify_req(inherited_bootstrap_port, MACH_NOTIFY_DEAD_NAME) == KERN_SUCCESS); - - /* We set this explicitly as we start each child */ - launchd_assert(launchd_set_bport(MACH_PORT_NULL) == KERN_SUCCESS); - } else if (!jobmgr_assumes(jmr, launchd_mport_create_recv(&jmr->jm_port) == KERN_SUCCESS)) { - goto out_bad; - } - - if (!name) { - sprintf(jmr->name_init, "%u", MACH_PORT_INDEX(jmr->jm_port)); - } - - /* Sigh... at the moment, MIG has maxsize == sizeof(reply union) */ - mxmsgsz = (typeof(mxmsgsz)) sizeof(union __RequestUnion__job_mig_protocol_vproc_subsystem); - if (job_mig_protocol_vproc_subsystem.maxsize > mxmsgsz) { - mxmsgsz = job_mig_protocol_vproc_subsystem.maxsize; - } - - if (!jm) { - jobmgr_assumes(jmr, kevent_mod(SIGTERM, EVFILT_SIGNAL, EV_ADD, 0, 0, jmr) != -1); - jobmgr_assumes(jmr, kevent_mod(SIGUSR1, EVFILT_SIGNAL, EV_ADD, 0, 0, jmr) != -1); - jobmgr_assumes(jmr, kevent_mod(SIGUSR2, EVFILT_SIGNAL, EV_ADD, 0, 0, jmr) != -1); - jobmgr_assumes(jmr, kevent_mod(0, EVFILT_FS, EV_ADD, VQ_MOUNT|VQ_UNMOUNT|VQ_UPDATE, 0, jmr) != -1); - } - - if (name && !no_init) { - bootstrapper = jobmgr_init_session(jmr, name, sflag); - } - - if (!bootstrapper || !bootstrapper->weird_bootstrap) { - if (!jobmgr_assumes(jmr, runtime_add_mport(jmr->jm_port, protocol_vproc_server, mxmsgsz) == KERN_SUCCESS)) { - goto out_bad; - } - } - - STAILQ_INIT(&jmr->pending_samples); - - jobmgr_log(jmr, LOG_DEBUG, "Created job manager%s%s", jm ? " with parent: " : ".", jm ? jm->name : ""); - - if (bootstrapper) { - bootstrapper->audit_session = session_port; - if( session_port != MACH_PORT_NULL ) { - mach_port_mod_refs(mach_task_self(), session_port, MACH_PORT_RIGHT_SEND, 1); - } - - jobmgr_log(jmr, LOG_DEBUG, "Bootstrapping new job manager with audit session %u", session_port); - jobmgr_assumes(jmr, job_dispatch(bootstrapper, true) != NULL); - } - - if (jmr->parentmgr) { - runtime_add_weak_ref(); - } - - return jmr; - -out_bad: - if (jmr) { - jobmgr_remove(jmr); - } - return NULL; -} - -job_t -jobmgr_init_session(jobmgr_t jm, const char *session_type, bool sflag) -{ - const char *bootstrap_tool[] = { "/bin/launchctl", "bootstrap", "-S", session_type, sflag ? "-s" : NULL, NULL }; - char thelabel[1000]; - job_t bootstrapper; - - snprintf(thelabel, sizeof(thelabel), "com.apple.launchctl.%s", session_type); - bootstrapper = job_new(jm, thelabel, NULL, bootstrap_tool); - - if( jobmgr_assumes(jm, bootstrapper != NULL) && (jm->parentmgr || !pid1_magic) ) { - bootstrapper->is_bootstrapper = true; - char buf[100]; - - /* launchd-201: can't ssh in with AFP OD account (hangs) */ - snprintf(buf, sizeof(buf), "0x%X:0:0", getuid()); - envitem_new(bootstrapper, "__CF_USER_TEXT_ENCODING", buf, false, false); - bootstrapper->weird_bootstrap = true; - jobmgr_assumes(jm, job_setup_machport(bootstrapper)); - } else if( bootstrapper && strncmp(session_type, VPROCMGR_SESSION_SYSTEM, sizeof(VPROCMGR_SESSION_SYSTEM)) == 0 ) { - bootstrapper->is_bootstrapper = true; - if( jobmgr_assumes(jm, pid1_magic) ) { - /* Have our system bootstrapper print out to the console. */ - bootstrapper->stdoutpath = strdup(_PATH_CONSOLE); - bootstrapper->stderrpath = strdup(_PATH_CONSOLE); - - if( g_console ) { - jobmgr_assumes(jm, kevent_mod((uintptr_t)fileno(g_console), EVFILT_VNODE, EV_ADD | EV_ONESHOT, NOTE_REVOKE, 0, jm) != -1); - } - } - } - - jm->session_initialized = true; - - return bootstrapper; -} - -jobmgr_t -jobmgr_delete_anything_with_port(jobmgr_t jm, mach_port_t port) -{ - struct machservice *ms, *next_ms; - jobmgr_t jmi, jmn; - - /* Mach ports, unlike Unix descriptors, are reference counted. In other - * words, when some program hands us a second or subsequent send right - * to a port we already have open, the Mach kernel gives us the same - * port number back and increments an reference count associated with - * the port. This forces us, when discovering that a receive right at - * the other end has been deleted, to wander all of our objects to see - * what weird places clients might have handed us the same send right - * to use. - */ - - if (jm == root_jobmgr) { - if (port == inherited_bootstrap_port) { - jobmgr_assumes(jm, launchd_mport_deallocate(port) == KERN_SUCCESS); - inherited_bootstrap_port = MACH_PORT_NULL; - - return jobmgr_shutdown(jm); - } - - LIST_FOREACH_SAFE(ms, &port_hash[HASH_PORT(port)], port_hash_sle, next_ms) { - if (ms->port == port && !ms->recv) { - machservice_delete(ms->job, ms, true); - } - } - } - - SLIST_FOREACH_SAFE(jmi, &jm->submgrs, sle, jmn) { - jobmgr_delete_anything_with_port(jmi, port); - } - - if (jm->req_port == port) { - jobmgr_log(jm, LOG_DEBUG, "Request port died: %i", MACH_PORT_INDEX(port)); - return jobmgr_shutdown(jm); - } - - return jm; -} - -struct machservice * -jobmgr_lookup_service(jobmgr_t jm, const char *name, bool check_parent, pid_t target_pid) -{ - struct machservice *ms; - job_t target_j; - - jobmgr_log(jm, LOG_DEBUG, "Looking up %sservice %s", target_pid ? "per-PID " : "", name); - - if (target_pid) { - /* This is a hack to let FileSyncAgent look up per-PID Mach services from the Background - * bootstrap in other bootstraps. - */ - - /* Start in the given bootstrap. */ - if( unlikely((target_j = jobmgr_find_by_pid(jm, target_pid, false)) == NULL) ) { - /* If we fail, do a deep traversal. */ - if (unlikely((target_j = jobmgr_find_by_pid_deep(root_jobmgr, target_pid, true)) == NULL)) { - jobmgr_log(jm, LOG_DEBUG, "Didn't find PID %i", target_pid); - return NULL; - } - } - - SLIST_FOREACH(ms, &target_j->machservices, sle) { - if (ms->per_pid && strcmp(name, ms->name) == 0) { - return ms; - } - } - - job_log(target_j, LOG_DEBUG, "Didn't find per-PID Mach service: %s", name); - return NULL; - } - - jobmgr_t jm_to_search = ( g_flat_mach_namespace && !(jm->properties & BOOTSTRAP_PROPERTY_EXPLICITSUBSET) ) ? root_jobmgr : jm; - LIST_FOREACH(ms, &jm_to_search->ms_hash[hash_ms(name)], name_hash_sle) { - if (!ms->per_pid && strcmp(name, ms->name) == 0) { - return ms; - } - } - - if (jm->parentmgr == NULL || !check_parent) { - return NULL; - } - - return jobmgr_lookup_service(jm->parentmgr, name, true, 0); -} - -mach_port_t -machservice_port(struct machservice *ms) -{ - return ms->port; -} - -job_t -machservice_job(struct machservice *ms) -{ - return ms->job; -} - -bool -machservice_hidden(struct machservice *ms) -{ - return ms->hide; -} - -bool -machservice_active(struct machservice *ms) -{ - return ms->isActive; -} - -const char * -machservice_name(struct machservice *ms) -{ - return ms->name; -} - -void -machservice_drain_port(struct machservice *ms) -{ - bool drain_one = ms->drain_one_on_crash; - bool drain_all = ms->drain_all_on_crash; - - if( !job_assumes(ms->job, (drain_one || drain_all) == true) ) { - return; - } - - job_log(ms->job, LOG_INFO, "Draining %s...", ms->name); - - char req_buff[sizeof(union __RequestUnion__catch_mach_exc_subsystem) * 2]; - char rep_buff[sizeof(union __ReplyUnion__catch_mach_exc_subsystem)]; - mig_reply_error_t *req_hdr = (mig_reply_error_t *)&req_buff; - mig_reply_error_t *rep_hdr = (mig_reply_error_t *)&rep_buff; - - mach_msg_return_t mr = ~MACH_MSG_SUCCESS; - - do { - /* This should be a direct check on the Mach service to see if it's an exception-handling - * port, and it will break things if ReportCrash or SafetyNet start advertising other - * Mach services. But for now, it should be okay. - */ - if( ms->job->alt_exc_handler || ms->job->internal_exc_handler ) { - mr = launchd_exc_runtime_once(ms->port, sizeof(req_buff), sizeof(rep_buff), req_hdr, rep_hdr, 0); - } else { - mach_msg_options_t options = MACH_RCV_MSG | - MACH_RCV_TIMEOUT ; - - mr = mach_msg((mach_msg_header_t *)req_hdr, options, 0, sizeof(req_buff), ms->port, 0, MACH_PORT_NULL); - switch( mr ) { - case MACH_MSG_SUCCESS : - mach_msg_destroy((mach_msg_header_t *)req_hdr); - break; - case MACH_RCV_TIMED_OUT : - break; - case MACH_RCV_TOO_LARGE : - runtime_syslog(LOG_WARNING, "Tried to receive message that was larger than %lu bytes", sizeof(req_buff)); - break; - default : - break; - } - } - } while( drain_all && mr != MACH_RCV_TIMED_OUT ); -} - -void -machservice_delete(job_t j, struct machservice *ms, bool port_died) -{ - if (unlikely(ms->debug_on_close)) { - job_log(j, LOG_NOTICE, "About to enter kernel debugger because of Mach port: 0x%x", ms->port); - job_assumes(j, host_reboot(mach_host_self(), HOST_REBOOT_DEBUGGER) == KERN_SUCCESS); - } - - if (ms->recv && job_assumes(j, !machservice_active(ms))) { - job_log(j, LOG_DEBUG, "Closing receive right for %s", ms->name); - job_assumes(j, launchd_mport_close_recv(ms->port) == KERN_SUCCESS); - } - - job_assumes(j, launchd_mport_deallocate(ms->port) == KERN_SUCCESS); - - if (unlikely(ms->port == the_exception_server)) { - the_exception_server = 0; - } - - job_log(j, LOG_DEBUG, "Mach service deleted%s: %s", port_died ? " (port died)" : "", ms->name); - - if (ms->special_port_num) { - SLIST_REMOVE(&special_ports, ms, machservice, special_port_sle); - } - - SLIST_REMOVE(&j->machservices, ms, machservice, sle); - LIST_REMOVE(ms, name_hash_sle); - LIST_REMOVE(ms, port_hash_sle); - - free(ms); -} - -void -machservice_request_notifications(struct machservice *ms) -{ - mach_msg_id_t which = MACH_NOTIFY_DEAD_NAME; - - ms->isActive = true; - - if (ms->recv) { - which = MACH_NOTIFY_PORT_DESTROYED; - job_checkin(ms->job); - } - - job_assumes(ms->job, launchd_mport_notify_req(ms->port, which) == KERN_SUCCESS); -} - -#define NELEM(x) (sizeof(x)/sizeof(x[0])) -#define END_OF(x) (&(x)[NELEM(x)]) - -char ** -mach_cmd2argv(const char *string) -{ - char *argv[100], args[1000]; - const char *cp; - char *argp = args, term, **argv_ret, *co; - unsigned int nargs = 0, i; - - for (cp = string; *cp;) { - while (isspace(*cp)) - cp++; - term = (*cp == '"') ? *cp++ : '\0'; - if (nargs < NELEM(argv)) { - argv[nargs++] = argp; - } - while (*cp && (term ? *cp != term : !isspace(*cp)) && argp < END_OF(args)) { - if (*cp == '\\') { - cp++; - } - *argp++ = *cp; - if (*cp) { - cp++; - } - } - *argp++ = '\0'; - } - argv[nargs] = NULL; - - if (nargs == 0) { - return NULL; - } - - argv_ret = malloc((nargs + 1) * sizeof(char *) + strlen(string) + 1); - - if (!launchd_assumes(argv_ret != NULL)) { - return NULL; - } - - co = (char *)argv_ret + (nargs + 1) * sizeof(char *); - - for (i = 0; i < nargs; i++) { - strcpy(co, argv[i]); - argv_ret[i] = co; - co += strlen(argv[i]) + 1; - } - argv_ret[i] = NULL; - - return argv_ret; -} - -void -job_checkin(job_t j) -{ - j->checkedin = true; -} - -bool job_is_god(job_t j) -{ - return j->embedded_special_privileges; -} - -bool -job_ack_port_destruction(mach_port_t p) -{ - struct machservice *ms; - job_t j; - - LIST_FOREACH(ms, &port_hash[HASH_PORT(p)], port_hash_sle) { - if (ms->recv && (ms->port == p)) { - break; - } - } - - if (!jobmgr_assumes(root_jobmgr, ms != NULL)) { - return false; - } - - j = ms->job; - - jobmgr_log(root_jobmgr, LOG_DEBUG, "Receive right returned to us: %s", ms->name); - - /* Without being the exception handler, NOTE_EXIT is our only way to tell if the job - * crashed, and we can't rely on NOTE_EXIT always being processed after all the job's - * receive rights have been returned. - * - * So when we get receive rights back, check to see if the job has been reaped yet. If - * not, then we add this service to a list of services to be drained on crash if it's - * requested that behavior. So, for a job with N receive rights all requesting that they - * be drained on crash, we can safely handle the following sequence of events. - * - * ReceiveRight0Returned - * ReceiveRight1Returned - * ReceiveRight2Returned - * NOTE_EXIT (reap, get exit status) - * ReceiveRight3Returned - * . - * . - * . - * ReceiveRight(N - 1)Returned - */ - - if( ms->drain_one_on_crash || ms->drain_all_on_crash ) { - if( j->crashed && j->reaped ) { - job_log(j, LOG_DEBUG, "Job has crashed. Draining port..."); - machservice_drain_port(ms); - } else if( !(j->crashed || j->reaped) ) { - job_log(j, LOG_DEBUG, "Job's exit status is still unknown. Deferring drain."); - } - } - - ms->isActive = false; - if (ms->delete_on_destruction) { - machservice_delete(j, ms, false); - } else if (ms->reset) { - machservice_resetport(j, ms); - } - - job_dispatch(j, false); - - root_jobmgr = jobmgr_do_garbage_collection(root_jobmgr); - - return true; -} - -void -job_ack_no_senders(job_t j) -{ - j->priv_port_has_senders = false; - - job_assumes(j, launchd_mport_close_recv(j->j_port) == KERN_SUCCESS); - j->j_port = 0; - - job_log(j, LOG_DEBUG, "No more senders on privileged Mach bootstrap port"); - - job_dispatch(j, false); -} - -bool -semaphoreitem_new(job_t j, semaphore_reason_t why, const char *what) -{ - struct semaphoreitem *si; - size_t alloc_sz = sizeof(struct semaphoreitem); - - if (what) { - alloc_sz += strlen(what) + 1; - } - - if (!job_assumes(j, si = calloc(1, alloc_sz))) { - return false; - } - - si->fd = -1; - si->why = why; - - if (what) { - strcpy(si->what_init, what); - } - - SLIST_INSERT_HEAD(&j->semaphores, si, sle); - - if( (why == OTHER_JOB_ENABLED || why == OTHER_JOB_DISABLED) && !j->nosy ) { - job_log(j, LOG_DEBUG, "Job is interested in \"%s\".", what); - SLIST_INSERT_HEAD(&s_curious_jobs, j, curious_jobs_sle); - j->nosy = true; - } - - semaphoreitem_runtime_mod_ref(si, true); - - return true; -} - -void -semaphoreitem_runtime_mod_ref(struct semaphoreitem *si, bool add) -{ - /* - * External events need to be tracked. - * Internal events do NOT need to be tracked. - */ - - switch (si->why) { - case SUCCESSFUL_EXIT: - case FAILED_EXIT: - case OTHER_JOB_ENABLED: - case OTHER_JOB_DISABLED: - case OTHER_JOB_ACTIVE: - case OTHER_JOB_INACTIVE: - return; - default: - break; - } - - if (add) { - runtime_add_weak_ref(); - } else { - runtime_del_weak_ref(); - } -} - -void -semaphoreitem_delete(job_t j, struct semaphoreitem *si) -{ - semaphoreitem_runtime_mod_ref(si, false); - - SLIST_REMOVE(&j->semaphores, si, semaphoreitem, sle); - - if (si->fd != -1) { - job_assumes(j, runtime_close(si->fd) != -1); - } - - /* We'll need to rethink this if it ever becomes possible to dynamically add or remove semaphores. */ - if( (si->why == OTHER_JOB_ENABLED || si->why == OTHER_JOB_DISABLED) && j->nosy ) { - j->nosy = false; - SLIST_REMOVE(&s_curious_jobs, j, job_s, curious_jobs_sle); - } - - free(si); -} - -void -semaphoreitem_setup_dict_iter(launch_data_t obj, const char *key, void *context) -{ - struct semaphoreitem_dict_iter_context *sdic = context; - semaphore_reason_t why; - - why = launch_data_get_bool(obj) ? sdic->why_true : sdic->why_false; - - semaphoreitem_new(sdic->j, why, key); -} - -void -semaphoreitem_setup(launch_data_t obj, const char *key, void *context) -{ - struct semaphoreitem_dict_iter_context sdic = { context, 0, 0 }; - job_t j = context; - semaphore_reason_t why; - - switch (launch_data_get_type(obj)) { - case LAUNCH_DATA_BOOL: - if (strcasecmp(key, LAUNCH_JOBKEY_KEEPALIVE_NETWORKSTATE) == 0) { - why = launch_data_get_bool(obj) ? NETWORK_UP : NETWORK_DOWN; - semaphoreitem_new(j, why, NULL); - } else if (strcasecmp(key, LAUNCH_JOBKEY_KEEPALIVE_SUCCESSFULEXIT) == 0) { - why = launch_data_get_bool(obj) ? SUCCESSFUL_EXIT : FAILED_EXIT; - semaphoreitem_new(j, why, NULL); - j->start_pending = true; - } else if( strcasecmp(key, LAUNCH_JOBKEY_KEEPALIVE_AFTERINITIALDEMAND) == 0 ) { - j->needs_kickoff = launch_data_get_bool(obj); - } else { - job_assumes(j, false); - } - break; - case LAUNCH_DATA_DICTIONARY: - if (strcasecmp(key, LAUNCH_JOBKEY_KEEPALIVE_PATHSTATE) == 0) { - sdic.why_true = PATH_EXISTS; - sdic.why_false = PATH_MISSING; - } else if (strcasecmp(key, LAUNCH_JOBKEY_KEEPALIVE_OTHERJOBACTIVE) == 0) { - sdic.why_true = OTHER_JOB_ACTIVE; - sdic.why_false = OTHER_JOB_INACTIVE; - } else if (strcasecmp(key, LAUNCH_JOBKEY_KEEPALIVE_OTHERJOBENABLED) == 0) { - sdic.why_true = OTHER_JOB_ENABLED; - sdic.why_false = OTHER_JOB_DISABLED; - } else { - job_assumes(j, false); - break; - } - - launch_data_dict_iterate(obj, semaphoreitem_setup_dict_iter, &sdic); - break; - default: - job_assumes(j, false); - break; - } -} - -void -jobmgr_dispatch_all_semaphores(jobmgr_t jm) -{ - jobmgr_t jmi, jmn; - job_t ji, jn; - - - SLIST_FOREACH_SAFE(jmi, &jm->submgrs, sle, jmn) { - jobmgr_dispatch_all_semaphores(jmi); - } - - LIST_FOREACH_SAFE(ji, &jm->jobs, sle, jn) { - if (!SLIST_EMPTY(&ji->semaphores)) { - job_dispatch(ji, false); - } - } -} - -time_t -cronemu(int mon, int mday, int hour, int min) -{ - struct tm workingtm; - time_t now; - - now = time(NULL); - workingtm = *localtime(&now); - - workingtm.tm_isdst = -1; - workingtm.tm_sec = 0; - workingtm.tm_min++; - - while (!cronemu_mon(&workingtm, mon, mday, hour, min)) { - workingtm.tm_year++; - workingtm.tm_mon = 0; - workingtm.tm_mday = 1; - workingtm.tm_hour = 0; - workingtm.tm_min = 0; - mktime(&workingtm); - } - - return mktime(&workingtm); -} - -time_t -cronemu_wday(int wday, int hour, int min) -{ - struct tm workingtm; - time_t now; - - now = time(NULL); - workingtm = *localtime(&now); - - workingtm.tm_isdst = -1; - workingtm.tm_sec = 0; - workingtm.tm_min++; - - if (wday == 7) { - wday = 0; - } - - while (!(workingtm.tm_wday == wday && cronemu_hour(&workingtm, hour, min))) { - workingtm.tm_mday++; - workingtm.tm_hour = 0; - workingtm.tm_min = 0; - mktime(&workingtm); - } - - return mktime(&workingtm); -} - -bool -cronemu_mon(struct tm *wtm, int mon, int mday, int hour, int min) -{ - if (mon == -1) { - struct tm workingtm = *wtm; - int carrytest; - - while (!cronemu_mday(&workingtm, mday, hour, min)) { - workingtm.tm_mon++; - workingtm.tm_mday = 1; - workingtm.tm_hour = 0; - workingtm.tm_min = 0; - carrytest = workingtm.tm_mon; - mktime(&workingtm); - if (carrytest != workingtm.tm_mon) { - return false; - } - } - *wtm = workingtm; - return true; - } - - if (mon < wtm->tm_mon) { - return false; - } - - if (mon > wtm->tm_mon) { - wtm->tm_mon = mon; - wtm->tm_mday = 1; - wtm->tm_hour = 0; - wtm->tm_min = 0; - } - - return cronemu_mday(wtm, mday, hour, min); -} - -bool -cronemu_mday(struct tm *wtm, int mday, int hour, int min) -{ - if (mday == -1) { - struct tm workingtm = *wtm; - int carrytest; - - while (!cronemu_hour(&workingtm, hour, min)) { - workingtm.tm_mday++; - workingtm.tm_hour = 0; - workingtm.tm_min = 0; - carrytest = workingtm.tm_mday; - mktime(&workingtm); - if (carrytest != workingtm.tm_mday) { - return false; - } - } - *wtm = workingtm; - return true; - } - - if (mday < wtm->tm_mday) { - return false; - } - - if (mday > wtm->tm_mday) { - wtm->tm_mday = mday; - wtm->tm_hour = 0; - wtm->tm_min = 0; - } - - return cronemu_hour(wtm, hour, min); -} - -bool -cronemu_hour(struct tm *wtm, int hour, int min) -{ - if (hour == -1) { - struct tm workingtm = *wtm; - int carrytest; - - while (!cronemu_min(&workingtm, min)) { - workingtm.tm_hour++; - workingtm.tm_min = 0; - carrytest = workingtm.tm_hour; - mktime(&workingtm); - if (carrytest != workingtm.tm_hour) { - return false; - } - } - *wtm = workingtm; - return true; - } - - if (hour < wtm->tm_hour) { - return false; - } - - if (hour > wtm->tm_hour) { - wtm->tm_hour = hour; - wtm->tm_min = 0; - } - - return cronemu_min(wtm, min); -} - -bool -cronemu_min(struct tm *wtm, int min) -{ - if (min == -1) { - return true; - } - - if (min < wtm->tm_min) { - return false; - } - - if (min > wtm->tm_min) { - wtm->tm_min = min; - } - - return true; -} - -kern_return_t -job_mig_setup_shmem(job_t j, mach_port_t *shmem_port) -{ - memory_object_size_t size_of_page, size_of_page_orig; - vm_address_t vm_addr; - kern_return_t kr; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(j->anonymous)) { - job_log(j, LOG_DEBUG, "Anonymous job tried to setup shared memory"); - return BOOTSTRAP_NOT_PRIVILEGED; - } - - if (unlikely(j->shmem)) { - job_log(j, LOG_ERR, "Tried to setup shared memory more than once"); - return BOOTSTRAP_NOT_PRIVILEGED; - } - - size_of_page_orig = size_of_page = getpagesize(); - - kr = vm_allocate(mach_task_self(), &vm_addr, size_of_page, true); - - if (!job_assumes(j, kr == 0)) { - return kr; - } - - j->shmem = (typeof(j->shmem))vm_addr; - j->shmem->vp_shmem_standby_timeout = j->timeout; - - kr = mach_make_memory_entry_64(mach_task_self(), &size_of_page, - (memory_object_offset_t)vm_addr, VM_PROT_READ|VM_PROT_WRITE, shmem_port, 0); - - if (job_assumes(j, kr == 0)) { - job_assumes(j, size_of_page == size_of_page_orig); - } - - /* no need to inherit this in child processes */ - job_assumes(j, vm_inherit(mach_task_self(), (vm_address_t)j->shmem, size_of_page_orig, VM_INHERIT_NONE) == 0); - - return kr; -} - -kern_return_t -job_mig_create_server(job_t j, cmd_t server_cmd, uid_t server_uid, boolean_t on_demand, mach_port_t *server_portp) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - job_t js; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(j->deny_job_creation)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - -#if HAVE_SANDBOX - const char **argv = (const char **)mach_cmd2argv(server_cmd); - if (unlikely(argv == NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - if (unlikely(sandbox_check(ldc->pid, "job-creation", SANDBOX_FILTER_PATH, argv[0]) > 0)) { - free(argv); - return BOOTSTRAP_NOT_PRIVILEGED; - } - free(argv); -#endif - - job_log(j, LOG_DEBUG, "Server create attempt: %s", server_cmd); - - if (pid1_magic) { - if (ldc->euid || ldc->uid) { - job_log(j, LOG_WARNING, "Server create attempt moved to per-user launchd: %s", server_cmd); - return VPROC_ERR_TRY_PER_USER; - } - } else { - if (unlikely(server_uid != getuid())) { - job_log(j, LOG_WARNING, "Server create: \"%s\": As UID %d, we will not be able to switch to UID %d", - server_cmd, getuid(), server_uid); - } - server_uid = 0; /* zero means "do nothing" */ - } - - js = job_new_via_mach_init(j, server_cmd, server_uid, on_demand); - - if (unlikely(js == NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - *server_portp = js->j_port; - return BOOTSTRAP_SUCCESS; -} - -kern_return_t -job_mig_send_signal(job_t j, mach_port_t srp, name_t targetlabel, int sig) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - job_t otherj; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if( unlikely(ldc->euid != 0 && ldc->euid != getuid()) || j->deny_job_creation ) { - - } - - if( unlikely(ldc->euid != 0 && ldc->euid != getuid()) || j->deny_job_creation ) { - #if TARGET_OS_EMBEDDED - if( !j->embedded_special_privileges ) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - #else - return BOOTSTRAP_NOT_PRIVILEGED; - #endif - } - -#if HAVE_SANDBOX - if (unlikely(sandbox_check(ldc->pid, "job-creation", SANDBOX_FILTER_NONE) > 0)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } -#endif - - if (unlikely(!(otherj = job_find(targetlabel)))) { - return BOOTSTRAP_UNKNOWN_SERVICE; - } - -#if TARGET_OS_EMBEDDED - if( j->embedded_special_privileges && strcmp(j->username, otherj->username) != 0 ) { - return BOOTSTRAP_NOT_PRIVILEGED; - } -#endif - - if (sig == VPROC_MAGIC_UNLOAD_SIGNAL) { - bool do_block = otherj->p; - - if (otherj->anonymous) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - job_remove(otherj); - - if (do_block) { - job_log(j, LOG_DEBUG, "Blocking MIG return of job_remove(): %s", otherj->label); - /* this is messy. We shouldn't access 'otherj' after job_remove(), but we check otherj->p first... */ - job_assumes(otherj, waiting4removal_new(otherj, srp)); - return MIG_NO_REPLY; - } else { - return 0; - } - } else if (sig == VPROC_MAGIC_TRYKILL_SIGNAL) { - if (!j->kill_via_shmem) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - if (!j->shmem) { - j->sent_kill_via_shmem = true; - job_assumes(j, runtime_kill(otherj->p, SIGKILL) != -1); - return 0; - } - #if !TARGET_OS_EMBEDDED - if (__sync_bool_compare_and_swap(&j->shmem->vp_shmem_transaction_cnt, 0, -1)) { - j->shmem->vp_shmem_flags |= VPROC_SHMEM_EXITING; - j->sent_kill_via_shmem = true; - job_assumes(j, runtime_kill(otherj->p, SIGKILL) != -1); - return 0; - } - #endif - return BOOTSTRAP_NOT_PRIVILEGED; - } else if (otherj->p) { - job_assumes(j, runtime_kill(otherj->p, sig) != -1); - } - - return 0; -} - -kern_return_t -job_mig_log_forward(job_t j, vm_offset_t inval, mach_msg_type_number_t invalCnt) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (!job_assumes(j, j->per_user)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - return runtime_log_forward(ldc->euid, ldc->egid, inval, invalCnt); -} - -kern_return_t -job_mig_log_drain(job_t j, mach_port_t srp, vm_offset_t *outval, mach_msg_type_number_t *outvalCnt) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(ldc->euid)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - return runtime_log_drain(srp, outval, outvalCnt); -} - -kern_return_t -job_mig_swap_complex(job_t j, vproc_gsk_t inkey, vproc_gsk_t outkey, - vm_offset_t inval, mach_msg_type_number_t invalCnt, - vm_offset_t *outval, mach_msg_type_number_t *outvalCnt) -{ - const char *action; - launch_data_t input_obj = NULL, output_obj = NULL; - size_t data_offset = 0; - size_t packed_size; - struct ldcred *ldc = runtime_get_caller_creds(); - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(inkey && ldc->euid && ldc->euid != getuid())) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - if (unlikely(inkey && outkey && !job_assumes(j, inkey == outkey))) { - return 1; - } - - if (inkey && outkey) { - action = "Swapping"; - } else if (inkey) { - action = "Setting"; - } else { - action = "Getting"; - } - - job_log(j, LOG_DEBUG, "%s key: %u", action, inkey ? inkey : outkey); - - *outvalCnt = 20 * 1024 * 1024; - mig_allocate(outval, *outvalCnt); - if (!job_assumes(j, *outval != 0)) { - return 1; - } - - runtime_ktrace0(RTKT_LAUNCHD_DATA_UNPACK); - if (unlikely(invalCnt && !job_assumes(j, (input_obj = launch_data_unpack((void *)inval, invalCnt, NULL, 0, &data_offset, NULL)) != NULL))) { - goto out_bad; - } - - switch (outkey) { - case VPROC_GSK_ENVIRONMENT: - if (!job_assumes(j, (output_obj = launch_data_alloc(LAUNCH_DATA_DICTIONARY)))) { - goto out_bad; - } - jobmgr_export_env_from_other_jobs(j->mgr, output_obj); - runtime_ktrace0(RTKT_LAUNCHD_DATA_PACK); - if (!job_assumes(j, launch_data_pack(output_obj, (void *)*outval, *outvalCnt, NULL, NULL) != 0)) { - goto out_bad; - } - launch_data_free(output_obj); - break; - case VPROC_GSK_ALLJOBS: - if (!job_assumes(j, (output_obj = job_export_all()) != NULL)) { - goto out_bad; - } - ipc_revoke_fds(output_obj); - runtime_ktrace0(RTKT_LAUNCHD_DATA_PACK); - packed_size = launch_data_pack(output_obj, (void *)*outval, *outvalCnt, NULL, NULL); - if (!job_assumes(j, packed_size != 0)) { - goto out_bad; - } - launch_data_free(output_obj); - break; - case VPROC_GSK_MGR_NAME: - if( !job_assumes(j, (output_obj = launch_data_new_string(j->mgr->name)) != NULL) ) { - goto out_bad; - } - packed_size = launch_data_pack(output_obj, (void *)*outval, *outvalCnt, NULL, NULL); - if (!job_assumes(j, packed_size != 0)) { - goto out_bad; - } - - launch_data_free(output_obj); - break; - case VPROC_GSK_JOB_OVERRIDES_DB: - if( !job_assumes(j, (output_obj = launch_data_new_string(launchd_data_base_path(LAUNCHD_DB_TYPE_OVERRIDES))) != NULL) ) { - goto out_bad; - } - packed_size = launch_data_pack(output_obj, (void *)*outval, *outvalCnt, NULL, NULL); - if (!job_assumes(j, packed_size != 0)) { - goto out_bad; - } - - launch_data_free(output_obj); - break; - case VPROC_GSK_JOB_CACHE_DB: - if( !job_assumes(j, (output_obj = launch_data_new_string(launchd_data_base_path(LAUNCHD_DB_TYPE_JOBCACHE))) != NULL) ) { - goto out_bad; - } - packed_size = launch_data_pack(output_obj, (void *)*outval, *outvalCnt, NULL, NULL); - if (!job_assumes(j, packed_size != 0)) { - goto out_bad; - } - - job_log(j, LOG_DEBUG, "Location of job cache database: %s", launch_data_get_string(output_obj)); - - launch_data_free(output_obj); - break; - case 0: - mig_deallocate(*outval, *outvalCnt); - *outval = 0; - *outvalCnt = 0; - break; - default: - goto out_bad; - } - - if (invalCnt) switch (inkey) { - case VPROC_GSK_ENVIRONMENT: - if( launch_data_get_type(input_obj) == LAUNCH_DATA_DICTIONARY ) { - if( j->p ) { - job_log(j, LOG_INFO, "Setting environment for a currently active job. This environment will take effect on the next invocation of the job."); - } - launch_data_dict_iterate(input_obj, envitem_setup_one_shot, j); - } - break; - case 0: - break; - default: - goto out_bad; - } - - mig_deallocate(inval, invalCnt); - - return 0; - -out_bad: - if (*outval) { - mig_deallocate(*outval, *outvalCnt); - } - return 1; -} - -kern_return_t -job_mig_swap_integer(job_t j, vproc_gsk_t inkey, vproc_gsk_t outkey, int64_t inval, int64_t *outval) -{ - const char *action; - kern_return_t kr = 0; - struct ldcred *ldc = runtime_get_caller_creds(); - int oldmask; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(inkey && ldc->euid && ldc->euid != getuid())) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - if (unlikely(inkey && outkey && !job_assumes(j, inkey == outkey))) { - return 1; - } - - if (inkey && outkey) { - action = "Swapping"; - } else if (inkey) { - action = "Setting"; - } else { - action = "Getting"; - } - - job_log(j, LOG_DEBUG, "%s key: %u", action, inkey ? inkey : outkey); - - switch (outkey) { - case VPROC_GSK_ABANDON_PROCESS_GROUP: - *outval = j->abandon_pg; - break; - case VPROC_GSK_LAST_EXIT_STATUS: - *outval = j->last_exit_status; - break; - case VPROC_GSK_MGR_UID: - *outval = getuid(); - break; - case VPROC_GSK_MGR_PID: - *outval = getpid(); - break; - case VPROC_GSK_IS_MANAGED: - *outval = j->anonymous ? 0 : 1; - break; - case VPROC_GSK_BASIC_KEEPALIVE: - *outval = !j->ondemand; - break; - case VPROC_GSK_START_INTERVAL: - *outval = j->start_interval; - break; - case VPROC_GSK_IDLE_TIMEOUT: - *outval = j->timeout; - break; - case VPROC_GSK_EXIT_TIMEOUT: - *outval = j->exit_timeout; - break; - case VPROC_GSK_GLOBAL_LOG_MASK: - oldmask = runtime_setlogmask(LOG_UPTO(LOG_DEBUG)); - *outval = oldmask; - runtime_setlogmask(oldmask); - break; - case VPROC_GSK_GLOBAL_UMASK: - oldmask = umask(0); - *outval = oldmask; - umask(oldmask); - break; - case VPROC_GSK_TRANSACTIONS_ENABLED: - job_log(j, LOG_DEBUG, "Reading transaction model status."); - *outval = j->kill_via_shmem; - break; - case VPROC_GSK_WAITFORDEBUGGER: - *outval = j->wait4debugger; - break; - case VPROC_GSK_EMBEDDEDROOTEQUIVALENT: - *outval = j->embedded_special_privileges; - break; - case 0: - *outval = 0; - break; - default: - kr = 1; - break; - } - - switch (inkey) { - case VPROC_GSK_ABANDON_PROCESS_GROUP: - j->abandon_pg = (bool)inval; - break; - case VPROC_GSK_GLOBAL_ON_DEMAND: - job_log(j, LOG_DEBUG, "Job is setting global on-demand mode to %s (j->forced_peers_to_demand_mode = %s)", (bool)inval ? "true" : "false", j->forced_peers_to_demand_mode ? "true" : "false"); - kr = job_set_global_on_demand(j, (bool)inval) ? 0 : 1; - break; - case VPROC_GSK_BASIC_KEEPALIVE: - j->ondemand = !inval; - break; - case VPROC_GSK_START_INTERVAL: - if (inval > UINT32_MAX || inval < 0) { - kr = 1; - } else if (inval) { - if (j->start_interval == 0) { - runtime_add_weak_ref(); - } - j->start_interval = (typeof(j->start_interval)) inval; - job_assumes(j, kevent_mod((uintptr_t)&j->start_interval, EVFILT_TIMER, EV_ADD, NOTE_SECONDS, j->start_interval, j) != -1); - } else if (j->start_interval) { - job_assumes(j, kevent_mod((uintptr_t)&j->start_interval, EVFILT_TIMER, EV_DELETE, 0, 0, NULL) != -1); - if (j->start_interval != 0) { - runtime_del_weak_ref(); - } - j->start_interval = 0; - } - break; - case VPROC_GSK_IDLE_TIMEOUT: - if (inval < 0 || inval > UINT32_MAX) { - kr = 1; - } else { - j->timeout = (typeof(j->timeout)) inval; - } - break; - case VPROC_GSK_EXIT_TIMEOUT: - if (inval < 0 || inval > UINT32_MAX) { - kr = 1; - } else { - j->exit_timeout = (typeof(j->exit_timeout)) inval; - } - break; - case VPROC_GSK_GLOBAL_LOG_MASK: - if (inval < 0 || inval > UINT32_MAX) { - kr = 1; - } else { - runtime_setlogmask((int) inval); - } - break; - case VPROC_GSK_GLOBAL_UMASK: - launchd_assert(sizeof (mode_t) == 2); - if (inval < 0 || inval > UINT16_MAX) { - kr = 1; - } else { - umask((mode_t) inval); - } - break; - case VPROC_GSK_TRANSACTIONS_ENABLED: - if( !job_assumes(j, inval != 0) ) { - job_log(j, LOG_WARNING, "Attempt to unregister from transaction model. This is not supported."); - kr = 1; - } else { - job_log(j, LOG_DEBUG, "Now participating in transaction model."); - j->kill_via_shmem = (bool)inval; - job_log(j, LOG_DEBUG, "j->kill_via_shmem = %s", j->kill_via_shmem ? "true" : "false"); - } - break; - case VPROC_GSK_WEIRD_BOOTSTRAP: - if( job_assumes(j, j->weird_bootstrap) ) { - job_log(j, LOG_DEBUG, "Unsetting weird bootstrap."); - - mach_msg_size_t mxmsgsz = (typeof(mxmsgsz)) sizeof(union __RequestUnion__job_mig_protocol_vproc_subsystem); - - if (job_mig_protocol_vproc_subsystem.maxsize > mxmsgsz) { - mxmsgsz = job_mig_protocol_vproc_subsystem.maxsize; - } - - job_assumes(j, runtime_add_mport(j->mgr->jm_port, protocol_vproc_server, mxmsgsz) == KERN_SUCCESS); - j->weird_bootstrap = false; - } - break; - case VPROC_GSK_WAITFORDEBUGGER: - j->wait4debugger_oneshot = inval; - break; - case VPROC_GSK_PERUSER_SUSPEND: - if( job_assumes(j, pid1_magic && ldc->euid == 0) ) { - mach_port_t junk = MACH_PORT_NULL; - job_t jpu = jobmgr_lookup_per_user_context_internal(j, (uid_t)inval, false, &junk); - if( job_assumes(j, jpu != NULL) ) { - struct suspended_peruser *spi = NULL; - LIST_FOREACH( spi, &j->suspended_perusers, sle ) { - if( (int64_t)(spi->j->mach_uid) == inval ) { - job_log(j, LOG_WARNING, "Job tried to suspend per-user launchd for UID %lli twice.", inval); - break; - } - } - - if( spi == NULL ) { - job_log(j, LOG_INFO, "Job is suspending the per-user launchd for UID %lli.", inval); - spi = (struct suspended_peruser *)calloc(sizeof(struct suspended_peruser), 1); - if( job_assumes(j, spi != NULL) ) { - spi->j = jpu; - spi->j->peruser_suspend_count++; - LIST_INSERT_HEAD(&j->suspended_perusers, spi, sle); - job_stop(spi->j); - } else { - kr = BOOTSTRAP_NO_MEMORY; - } - } - } - } else { - kr = 1; - } - break; - case VPROC_GSK_PERUSER_RESUME: - if( job_assumes(j, pid1_magic == true) ) { - struct suspended_peruser *spi = NULL, *spt = NULL; - LIST_FOREACH_SAFE( spi, &j->suspended_perusers, sle, spt ) { - if( (int64_t)(spi->j->mach_uid) == inval ) { - spi->j->peruser_suspend_count--; - LIST_REMOVE(spi, sle); - job_log(j, LOG_INFO, "Job is resuming the per-user launchd for UID %lli.", inval); - break; - } - } - - if( !job_assumes(j, spi != NULL) ) { - job_log(j, LOG_WARNING, "Job tried to resume per-user launchd for UID %lli that it did not suspend.", inval); - kr = BOOTSTRAP_NOT_PRIVILEGED; - } else if( spi->j->peruser_suspend_count == 0 ) { - job_dispatch(spi->j, false); - free(spi); - } - } else { - kr = 1; - } - break; - case 0: - break; - default: - kr = 1; - break; - } - - return kr; -} - -kern_return_t -job_mig_post_fork_ping(job_t j, task_t child_task, mach_port_t *audit_session) -{ - struct machservice *ms; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - job_log(j, LOG_DEBUG, "Post fork ping."); - - job_setup_exception_port(j, child_task); - - SLIST_FOREACH(ms, &special_ports, special_port_sle) { - if (j->per_user && (ms->special_port_num != TASK_ACCESS_PORT)) { - /* The TASK_ACCESS_PORT funny business is to workaround 5325399. */ - continue; - } - - errno = task_set_special_port(child_task, ms->special_port_num, ms->port); - - if (unlikely(errno)) { - int desired_log_level = LOG_ERR; - - if (j->anonymous) { - /* 5338127 */ - - desired_log_level = LOG_WARNING; - - if (ms->special_port_num == TASK_SEATBELT_PORT) { - desired_log_level = LOG_DEBUG; - } - } - - job_log(j, desired_log_level, "Could not setup Mach task special port %u: %s", ms->special_port_num, mach_error_string(errno)); - } - } - - mach_port_t _session = MACH_PORT_NULL; -#if !TARGET_OS_EMBEDDED - if( !j->anonymous && !j->per_user ) { - job_log(j, LOG_DEBUG, "Returning session port %u", j->audit_session); - _session = j->audit_session; - } -#endif - *audit_session = _session; - job_assumes(j, launchd_mport_deallocate(child_task) == KERN_SUCCESS); - - return 0; -} - -kern_return_t -job_mig_reboot2(job_t j, uint64_t flags) -{ - char who_started_the_reboot[2048] = ""; - struct kinfo_proc kp; - struct ldcred *ldc = runtime_get_caller_creds(); - pid_t pid_to_log; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(!pid1_magic)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - -#if !TARGET_OS_EMBEDDED - if (unlikely(ldc->euid)) { -#else - if( unlikely(ldc->euid) && !j->embedded_special_privileges ) { -#endif - return BOOTSTRAP_NOT_PRIVILEGED; - } - - for (pid_to_log = ldc->pid; pid_to_log; pid_to_log = kp.kp_eproc.e_ppid) { - int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, pid_to_log }; - size_t who_offset, len = sizeof(kp); - - if (!job_assumes(j, sysctl(mib, 4, &kp, &len, NULL, 0) != -1)) { - return 1; - } - - if( !job_assumes(j, pid_to_log != kp.kp_eproc.e_ppid) ) { - job_log(j, LOG_WARNING, "Job which is its own parent started reboot."); - snprintf(who_started_the_reboot, sizeof(who_started_the_reboot), "%s[%u]->%s[%u]->%s[%u]->...", kp.kp_proc.p_comm, pid_to_log, kp.kp_proc.p_comm, pid_to_log, kp.kp_proc.p_comm, pid_to_log); - break; - } - - who_offset = strlen(who_started_the_reboot); - snprintf(who_started_the_reboot + who_offset, sizeof(who_started_the_reboot) - who_offset, - " %s[%u]%s", kp.kp_proc.p_comm, pid_to_log, kp.kp_eproc.e_ppid ? " ->" : ""); - } - - root_jobmgr->reboot_flags = (int)flags; - - launchd_shutdown(); - - job_log(j, LOG_DEBUG, "reboot2() initiated by:%s", who_started_the_reboot); - - return 0; -} - -kern_return_t -job_mig_getsocket(job_t j, name_t spr) -{ - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if( j->deny_job_creation ) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - ipc_server_init(); - - if (unlikely(!sockpath)) { - return BOOTSTRAP_NO_MEMORY; - } - - strncpy(spr, sockpath, sizeof(name_t)); - - return BOOTSTRAP_SUCCESS; -} - -kern_return_t -job_mig_log(job_t j, int pri, int err, logmsg_t msg) -{ - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if ((errno = err)) { - job_log_error(j, pri, "%s", msg); - } else { - job_log(j, pri, "%s", msg); - } - - return 0; -} - -job_t -jobmgr_lookup_per_user_context_internal(job_t j, uid_t which_user, bool dispatch, mach_port_t *mp) -{ - job_t ji = NULL; - LIST_FOREACH(ji, &root_jobmgr->jobs, sle) { - if (!ji->per_user) { - continue; - } - if (ji->mach_uid != which_user) { - continue; - } - if (SLIST_EMPTY(&ji->machservices)) { - continue; - } - if (!SLIST_FIRST(&ji->machservices)->per_user_hack) { - continue; - } - break; - } - - if( unlikely(ji == NULL) ) { - struct machservice *ms; - char lbuf[1024]; - - job_log(j, LOG_DEBUG, "Creating per user launchd job for UID: %u", which_user); - - sprintf(lbuf, "com.apple.launchd.peruser.%u", which_user); - - ji = job_new(root_jobmgr, lbuf, "/sbin/launchd", NULL); - - if( ji != NULL ) { - ji->mach_uid = which_user; - ji->per_user = true; - ji->kill_via_shmem = true; - - struct stat sb; - char pu_db[PATH_MAX]; - snprintf(pu_db, sizeof(pu_db), LAUNCHD_DB_PREFIX "/%s", lbuf); - - bool created = false; - int err = stat(pu_db, &sb); - if( (err == -1 && errno == ENOENT) || (err == 0 && !S_ISDIR(sb.st_mode)) ) { - if( err == 0 ) { - char move_aside[PATH_MAX]; - snprintf(move_aside, sizeof(move_aside), LAUNCHD_DB_PREFIX "/%s.movedaside", lbuf); - - job_assumes(ji, rename(pu_db, move_aside) != -1); - } - - job_assumes(ji, mkdir(pu_db, S_IRWXU) != -1); - job_assumes(ji, chown(pu_db, which_user, 0) != -1); - created = true; - } - - if( !created ) { - if( !job_assumes(ji, sb.st_uid == which_user) ) { - job_assumes(ji, chown(pu_db, which_user, 0) != -1); - } - if( !job_assumes(ji, sb.st_gid == 0) ) { - job_assumes(ji, chown(pu_db, which_user, 0) != -1); - } - if( !job_assumes(ji, sb.st_mode == (S_IRWXU | S_IFDIR)) ) { - job_assumes(ji, chmod(pu_db, S_IRWXU) != -1); - } - } - - if ((ms = machservice_new(ji, lbuf, mp, false)) == NULL) { - job_remove(ji); - ji = NULL; - } else { - ms->per_user_hack = true; - ms->hide = true; - - ji = dispatch ? job_dispatch(ji, false) : ji; - } - } - } else { - *mp = machservice_port(SLIST_FIRST(&ji->machservices)); - job_log(j, LOG_DEBUG, "Per user launchd job found for UID: %u", which_user); - } - - return ji; -} - -kern_return_t -job_mig_lookup_per_user_context(job_t j, uid_t which_user, mach_port_t *up_cont) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - job_t jpu; - -#if TARGET_OS_EMBEDDED - /* There is no need for per-user launchd's on embedded. */ - job_log(j, LOG_ERR, "Per-user launchds are not supported on this platform."); - return BOOTSTRAP_NOT_PRIVILEGED; -#endif - -#if HAVE_SANDBOX - if (unlikely(sandbox_check(ldc->pid, "mach-per-user-lookup", SANDBOX_FILTER_NONE) > 0)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } -#endif - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - job_log(j, LOG_INFO, "Looking up per user launchd for UID: %u", which_user); - - if (unlikely(!pid1_magic)) { - job_log(j, LOG_ERR, "Only PID 1 supports per user launchd lookups."); - return BOOTSTRAP_NOT_PRIVILEGED; - } - - if (ldc->euid || ldc->uid) { - which_user = ldc->euid ?: ldc->uid; - } - - *up_cont = MACH_PORT_NULL; - - jpu = jobmgr_lookup_per_user_context_internal(j, which_user, true, up_cont); - - return 0; -} - -kern_return_t -job_mig_check_in2(job_t j, name_t servicename, mach_port_t *serviceportp, uint64_t flags) -{ - bool per_pid_service = flags & BOOTSTRAP_PER_PID_SERVICE; - struct ldcred *ldc = runtime_get_caller_creds(); - struct machservice *ms; - job_t jo; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - ms = jobmgr_lookup_service(j->mgr, servicename, false, per_pid_service ? ldc->pid : 0); - - if (ms == NULL) { - *serviceportp = MACH_PORT_NULL; - - if (unlikely((ms = machservice_new(j, servicename, serviceportp, per_pid_service)) == NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - /* Treat this like a legacy job. */ - if( !j->legacy_mach_job ) { - ms->isActive = true; - ms->recv = false; - } - - if (!(j->anonymous || j->legacy_LS_job || j->legacy_mach_job)) { - job_log(j, LOG_SCOLDING, "Please add the following service to the configuration file for this job: %s", servicename); - } - } else { - if (unlikely((jo = machservice_job(ms)) != j)) { - static pid_t last_warned_pid; - - if (last_warned_pid != ldc->pid) { - job_log(jo, LOG_WARNING, "The following job tried to hijack the service \"%s\" from this job: %s", servicename, j->label); - last_warned_pid = ldc->pid; - } - - return BOOTSTRAP_NOT_PRIVILEGED; - } - if (unlikely(machservice_active(ms))) { - job_log(j, LOG_WARNING, "Check-in of Mach service failed. Already active: %s", servicename); - return BOOTSTRAP_SERVICE_ACTIVE; - } - } - - job_checkin(j); - machservice_request_notifications(ms); - - job_log(j, LOG_INFO, "Check-in of service: %s", servicename); - - *serviceportp = machservice_port(ms); - return BOOTSTRAP_SUCCESS; -} - -kern_return_t -job_mig_register2(job_t j, name_t servicename, mach_port_t serviceport, uint64_t flags) -{ - struct machservice *ms; - struct ldcred *ldc = runtime_get_caller_creds(); - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (!(flags & BOOTSTRAP_PER_PID_SERVICE) && !j->legacy_LS_job) { - job_log(j, LOG_SCOLDING, "Performance: bootstrap_register() is deprecated. Service: %s", servicename); - } - - job_log(j, LOG_DEBUG, "%sMach service registration attempt: %s", flags & BOOTSTRAP_PER_PID_SERVICE ? "Per PID " : "", servicename); - - /* 5641783 for the embedded hack */ -#if !TARGET_OS_EMBEDDED - /* - * From a per-user/session launchd's perspective, SecurityAgent (UID - * 92) is a rogue application (not our UID, not root and not a child of - * us). We'll have to reconcile this design friction at a later date. - */ - if (unlikely(j->anonymous && j->mgr->parentmgr == NULL && ldc->uid != 0 && ldc->uid != getuid() && ldc->uid != 92)) { - if (pid1_magic) { - return VPROC_ERR_TRY_PER_USER; - } else { - return BOOTSTRAP_NOT_PRIVILEGED; - } - } -#endif - - ms = jobmgr_lookup_service(j->mgr, servicename, false, flags & BOOTSTRAP_PER_PID_SERVICE ? ldc->pid : 0); - - if (unlikely(ms)) { - if (machservice_job(ms) != j) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - if (machservice_active(ms)) { - job_log(j, LOG_DEBUG, "Mach service registration failed. Already active: %s", servicename); - return BOOTSTRAP_SERVICE_ACTIVE; - } - if (ms->recv && (serviceport != MACH_PORT_NULL)) { - job_log(j, LOG_ERR, "bootstrap_register() erroneously called instead of bootstrap_check_in(). Mach service: %s", servicename); - return BOOTSTRAP_NOT_PRIVILEGED; - } - job_checkin(j); - machservice_delete(j, ms, false); - } - - if (likely(serviceport != MACH_PORT_NULL)) { - if (likely(ms = machservice_new(j, servicename, &serviceport, flags & BOOTSTRAP_PER_PID_SERVICE ? true : false))) { - machservice_request_notifications(ms); - } else { - return BOOTSTRAP_NO_MEMORY; - } - } - - - return BOOTSTRAP_SUCCESS; -} - -kern_return_t -job_mig_look_up2(job_t j, mach_port_t srp, name_t servicename, mach_port_t *serviceportp, pid_t target_pid, uint64_t flags) -{ - struct machservice *ms; - struct ldcred *ldc = runtime_get_caller_creds(); - kern_return_t kr; - bool per_pid_lookup = flags & BOOTSTRAP_PER_PID_SERVICE; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - /* 5641783 for the embedded hack */ -#if !TARGET_OS_EMBEDDED - if (unlikely(pid1_magic && j->anonymous && j->mgr->parentmgr == NULL && ldc->uid != 0 && ldc->euid != 0)) { - return VPROC_ERR_TRY_PER_USER; - } -#endif - -#if HAVE_SANDBOX - if (unlikely(sandbox_check(ldc->pid, "mach-lookup", per_pid_lookup ? SANDBOX_FILTER_LOCAL_NAME : SANDBOX_FILTER_GLOBAL_NAME, servicename) > 0)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } -#endif - - if (per_pid_lookup) { - ms = jobmgr_lookup_service(j->mgr, servicename, false, target_pid); - } else { - ms = jobmgr_lookup_service(j->mgr, servicename, true, 0); - } - - if (likely(ms)) { - if (machservice_hidden(ms) && !machservice_active(ms)) { - ms = NULL; - } else if (unlikely(ms->per_user_hack)) { - ms = NULL; - } - } - - if (likely(ms)) { - job_assumes(j, machservice_port(ms) != MACH_PORT_NULL); - job_log(j, LOG_DEBUG, "%sMach service lookup: %s", per_pid_lookup ? "Per PID " : "", servicename); - - if (unlikely(!per_pid_lookup && j->lastlookup == ms && j->lastlookup_gennum == ms->gen_num && !j->per_user)) { - /* we need to think more about the per_pid_lookup logic before logging about repeated lookups */ - job_log(j, LOG_DEBUG, "Performance: Please fix the framework that talks to \"%s\" to cache the Mach port for service: %s", ms->job->label, servicename); - } - - j->lastlookup = ms; - j->lastlookup_gennum = ms->gen_num; - - *serviceportp = machservice_port(ms); - - kr = BOOTSTRAP_SUCCESS; - } else if (!per_pid_lookup && (inherited_bootstrap_port != MACH_PORT_NULL)) { - job_log(j, LOG_DEBUG, "Mach service lookup forwarded: %s", servicename); - /* Clients potentially check the audit token of the reply to verify that the returned send right is trustworthy. */ - job_assumes(j, vproc_mig_look_up2_forward(inherited_bootstrap_port, srp, servicename, 0, 0) == 0); - /* The previous routine moved the reply port, we're forced to return MIG_NO_REPLY now */ - return MIG_NO_REPLY; - } else if (pid1_magic && j->anonymous && ldc->euid >= 500 && strcasecmp(j->mgr->name, VPROCMGR_SESSION_LOGINWINDOW) == 0) { - /* - * 5240036 Should start background session when a lookup of CCacheServer occurs - * - * This is a total hack. We sniff out loginwindow session, and attempt to guess what it is up to. - * If we find a EUID that isn't root, we force it over to the per-user context. - */ - return VPROC_ERR_TRY_PER_USER; - } else { - job_log(j, LOG_DEBUG, "%sMach service lookup failed: %s", per_pid_lookup ? "Per PID " : "", servicename); - kr = BOOTSTRAP_UNKNOWN_SERVICE; - } - - return kr; -} - -kern_return_t -job_mig_parent(job_t j, mach_port_t srp, mach_port_t *parentport) -{ - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - job_log(j, LOG_DEBUG, "Requested parent bootstrap port"); - jobmgr_t jm = j->mgr; - - if (jobmgr_parent(jm)) { - *parentport = jobmgr_parent(jm)->jm_port; - } else if (MACH_PORT_NULL == inherited_bootstrap_port) { - *parentport = jm->jm_port; - } else { - job_assumes(j, vproc_mig_parent_forward(inherited_bootstrap_port, srp) == 0); - /* The previous routine moved the reply port, we're forced to return MIG_NO_REPLY now */ - return MIG_NO_REPLY; - } - return BOOTSTRAP_SUCCESS; -} - -kern_return_t -job_mig_info(job_t j, name_array_t *servicenamesp, unsigned int *servicenames_cnt, - name_array_t *servicejobsp, unsigned int *servicejobs_cnt, - bootstrap_status_array_t *serviceactivesp, unsigned int *serviceactives_cnt, - uint64_t flags) -{ - name_array_t service_names = NULL; - name_array_t service_jobs = NULL; - bootstrap_status_array_t service_actives = NULL; - unsigned int cnt = 0, cnt2 = 0; - jobmgr_t jm; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if( g_flat_mach_namespace ) { - if( (j->mgr->properties & BOOTSTRAP_PROPERTY_EXPLICITSUBSET) || (flags & BOOTSTRAP_FORCE_LOCAL) ) { - jm = j->mgr; - } else { - jm = root_jobmgr; - } - } else { - jm = j->mgr; - } - - unsigned int i = 0; - struct machservice *msi = NULL; - for( i = 0; i < MACHSERVICE_HASH_SIZE; i++ ) { - LIST_FOREACH( msi, &jm->ms_hash[i], name_hash_sle ) { - cnt += !msi->per_pid ? 1 : 0; - } - } - - if (cnt == 0) { - goto out; - } - - mig_allocate((vm_address_t *)&service_names, cnt * sizeof(service_names[0])); - if (!job_assumes(j, service_names != NULL)) { - goto out_bad; - } - - mig_allocate((vm_address_t *)&service_jobs, cnt * sizeof(service_jobs[0])); - if (!job_assumes(j, service_jobs != NULL)) { - goto out_bad; - } - - mig_allocate((vm_address_t *)&service_actives, cnt * sizeof(service_actives[0])); - if (!job_assumes(j, service_actives != NULL)) { - goto out_bad; - } - - for( i = 0; i < MACHSERVICE_HASH_SIZE; i++ ) { - LIST_FOREACH( msi, &jm->ms_hash[i], name_hash_sle ) { - if( !msi->per_pid ) { - strlcpy(service_names[cnt2], machservice_name(msi), sizeof(service_names[0])); - strlcpy(service_jobs[cnt2], msi->job->label, sizeof(service_jobs[0])); - service_actives[cnt2] = machservice_status(msi); - cnt2++; - } - } - } - - job_assumes(j, cnt == cnt2); - -out: - *servicenamesp = service_names; - *servicejobsp = service_jobs; - *serviceactivesp = service_actives; - *servicenames_cnt = *servicejobs_cnt = *serviceactives_cnt = cnt; - - return BOOTSTRAP_SUCCESS; - -out_bad: - if (service_names) { - mig_deallocate((vm_address_t)service_names, cnt * sizeof(service_names[0])); - } - if (service_jobs) { - mig_deallocate((vm_address_t)service_jobs, cnt * sizeof(service_jobs[0])); - } - if (service_actives) { - mig_deallocate((vm_address_t)service_actives, cnt * sizeof(service_actives[0])); - } - - return BOOTSTRAP_NO_MEMORY; -} - -kern_return_t -job_mig_lookup_children(job_t j, mach_port_array_t *child_ports, mach_msg_type_number_t *child_ports_cnt, - name_array_t *child_names, mach_msg_type_number_t *child_names_cnt, - bootstrap_property_array_t *child_properties, mach_msg_type_number_t *child_properties_cnt) -{ - kern_return_t kr = BOOTSTRAP_NO_MEMORY; - if( !launchd_assumes(j != NULL) ) { - return BOOTSTRAP_NO_MEMORY; - } - - struct ldcred *ldc = runtime_get_caller_creds(); - - /* Only allow root processes to look up children, even if we're in the per-user launchd. - * Otherwise, this could be used to cross sessions, which counts as a security vulnerability - * in a non-flat namespace. - */ - if( ldc->euid != 0 ) { - job_log(j, LOG_WARNING, "Attempt to look up children of bootstrap by unprivileged job."); - return BOOTSTRAP_NOT_PRIVILEGED; - } - - unsigned int cnt = 0; - - jobmgr_t jmr = j->mgr; - jobmgr_t jmi = NULL; - SLIST_FOREACH( jmi, &jmr->submgrs, sle ) { - cnt++; - } - - /* Find our per-user launchds if we're PID 1. */ - job_t ji = NULL; - if( pid1_magic ) { - LIST_FOREACH( ji, &jmr->jobs, sle ) { - cnt += ji->per_user ? 1 : 0; - } - } - - if( cnt == 0 ) { - return BOOTSTRAP_NO_CHILDREN; - } - - mach_port_array_t _child_ports = NULL; - mig_allocate((vm_address_t *)&_child_ports, cnt * sizeof(_child_ports[0])); - if( !job_assumes(j, _child_ports != NULL) ) { - kr = BOOTSTRAP_NO_MEMORY; - goto out_bad; - } - - name_array_t _child_names = NULL; - mig_allocate((vm_address_t *)&_child_names, cnt * sizeof(_child_names[0])); - if( !job_assumes(j, _child_names != NULL) ) { - kr = BOOTSTRAP_NO_MEMORY; - goto out_bad; - } - - bootstrap_property_array_t _child_properties = NULL; - mig_allocate((vm_address_t *)&_child_properties, cnt * sizeof(_child_properties[0])); - if( !job_assumes(j, _child_properties != NULL) ) { - kr = BOOTSTRAP_NO_MEMORY; - goto out_bad; - } - - unsigned int cnt2 = 0; - SLIST_FOREACH( jmi, &jmr->submgrs, sle ) { - if( jobmgr_assumes(jmi, launchd_mport_make_send(jmi->jm_port) == KERN_SUCCESS) ) { - _child_ports[cnt2] = jmi->jm_port; - } else { - _child_ports[cnt2] = MACH_PORT_NULL; - } - - strlcpy(_child_names[cnt2], jmi->name, sizeof(_child_names[0])); - _child_properties[cnt2] = jmi->properties; - - cnt2++; - } - - if( pid1_magic ) LIST_FOREACH( ji, &jmr->jobs, sle ) { - if( ji->per_user ) { - if( job_assumes(ji, SLIST_FIRST(&ji->machservices)->per_user_hack == true) ) { - mach_port_t port = machservice_port(SLIST_FIRST(&ji->machservices)); - - if( job_assumes(ji, launchd_mport_copy_send(port) == KERN_SUCCESS) ) { - _child_ports[cnt2] = port; - } else { - _child_ports[cnt2] = MACH_PORT_NULL; - } - } else { - _child_ports[cnt2] = MACH_PORT_NULL; - } - - strlcpy(_child_names[cnt2], ji->label, sizeof(_child_names[0])); - _child_properties[cnt2] |= BOOTSTRAP_PROPERTY_PERUSER; - - cnt2++; - } - } - - *child_names_cnt = cnt; - *child_ports_cnt = cnt; - *child_properties_cnt = cnt; - - *child_names = _child_names; - *child_ports = _child_ports; - *child_properties = _child_properties; - - unsigned int i = 0; - for( i = 0; i < cnt; i++ ) { - job_log(j, LOG_DEBUG, "child_names[%u] = %s", i, (char *)_child_names[i]); - } - - return BOOTSTRAP_SUCCESS; -out_bad: - if( _child_ports ) { - mig_deallocate((vm_address_t)_child_ports, cnt * sizeof(_child_ports[0])); - } - - if( _child_names ) { - mig_deallocate((vm_address_t)_child_names, cnt * sizeof(_child_ports[0])); - } - - if( _child_properties ) { - mig_deallocate((vm_address_t)_child_properties, cnt * sizeof(_child_properties[0])); - } - - return kr; -} - -kern_return_t -job_mig_transaction_count_for_pid(job_t j, pid_t p, int32_t *cnt, boolean_t *condemned) -{ - kern_return_t kr = KERN_FAILURE; - struct ldcred *ldc = runtime_get_caller_creds(); - if( (ldc->euid != geteuid()) && (ldc->euid != 0) ) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - job_t j_for_pid = jobmgr_find_by_pid_deep(j->mgr, p, false); - if( j_for_pid ) { - if( j_for_pid->kill_via_shmem ) { - if( j_for_pid->shmem ) { - *cnt = j_for_pid->shmem->vp_shmem_transaction_cnt; - *condemned = j_for_pid->shmem->vp_shmem_flags & VPROC_SHMEM_EXITING; - *cnt += *condemned ? 1 : 0; - } else { - *cnt = 0; - *condemned = false; - } - - kr = BOOTSTRAP_SUCCESS; - } else { - kr = BOOTSTRAP_NO_MEMORY; - } - } else { - kr = BOOTSTRAP_UNKNOWN_SERVICE; - } - - return kr; -} - -kern_return_t -job_mig_pid_is_managed(job_t j __attribute__((unused)), pid_t p, boolean_t *managed) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - if( (ldc->euid != geteuid()) && (ldc->euid != 0) ) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - /* This is so loginwindow doesn't try to quit GUI apps that have been launched - * directly by launchd as agents. - */ - job_t j_for_pid = jobmgr_find_by_pid_deep(root_jobmgr, p, false); - if( j_for_pid && !j_for_pid->anonymous && !j_for_pid->legacy_LS_job ) { - *managed = true; - } - - return BOOTSTRAP_SUCCESS; -} - -kern_return_t -job_mig_port_for_label(job_t j __attribute__((unused)), name_t label, mach_port_t *mp) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - kern_return_t kr = BOOTSTRAP_NOT_PRIVILEGED; - - mach_port_t _mp = MACH_PORT_NULL; - if( !j->deny_job_creation && (ldc->euid == 0 || ldc->euid == geteuid()) ) { - job_t target_j = job_find(label); - if( jobmgr_assumes(root_jobmgr, target_j != NULL) ) { - if( target_j->j_port == MACH_PORT_NULL ) { - job_assumes(target_j, job_setup_machport(target_j) == true); - } - - _mp = target_j->j_port; - kr = _mp != MACH_PORT_NULL ? BOOTSTRAP_SUCCESS : BOOTSTRAP_NO_MEMORY; - } else { - kr = BOOTSTRAP_NO_MEMORY; - } - } - - *mp = _mp; - return kr; -} - -#if !TARGET_OS_EMBEDDED -kern_return_t -job_mig_set_security_session(job_t j, uuid_t uuid, mach_port_t session) -{ - uuid_string_t uuid_str; - uuid_unparse(uuid, uuid_str); - job_log(j, LOG_DEBUG, "Setting session %u for UUID %s...", session, uuid_str); - - job_t ji = NULL, jt = NULL; - LIST_FOREACH_SAFE( ji, &s_needing_sessions, sle, jt ) { - uuid_string_t uuid_str2; - uuid_unparse(ji->expected_audit_uuid, uuid_str2); - - if( uuid_compare(uuid, ji->expected_audit_uuid) == 0 ) { - uuid_clear(ji->expected_audit_uuid); - if( session != MACH_PORT_NULL ) { - job_log(ji, LOG_DEBUG, "Job should join session with port %u", session); - mach_port_mod_refs(mach_task_self(), session, MACH_PORT_RIGHT_SEND, 1); - } else { - job_log(ji, LOG_DEBUG, "No session to set for job. Using our session."); - } - - ji->audit_session = session; - LIST_REMOVE(ji, needing_session_sle); - job_dispatch(ji, false); - } - } - - /* Each job that the session port was set for holds a reference. At the end of - * the loop, there will be one extra reference belonging to this MiG protocol. - * We need to release it so that the session goes away when all the jobs - * referencing it are unloaded. - */ - mach_port_deallocate(mach_task_self(), session); - - return KERN_SUCCESS; -} -#else -kern_return_t -job_mig_set_security_session(job_t j __attribute__((unused)), uuid_t uuid __attribute__((unused)), mach_port_t session __attribute__((unused))) -{ - return KERN_SUCCESS; -} -#endif - -jobmgr_t -jobmgr_find_by_name(jobmgr_t jm, const char *where) -{ - jobmgr_t jmi, jmi2; - - /* NULL is only passed for our custom API for LaunchServices. If that is the case, we do magic. */ - if (where == NULL) { - if (strcasecmp(jm->name, VPROCMGR_SESSION_LOGINWINDOW) == 0) { - where = VPROCMGR_SESSION_LOGINWINDOW; - } else { - where = VPROCMGR_SESSION_AQUA; - } - } - - if (strcasecmp(jm->name, where) == 0) { - return jm; - } - - if( strcasecmp(where, VPROCMGR_SESSION_BACKGROUND) == 0 && !pid1_magic ) { - jmi = root_jobmgr; - goto jm_found; - } - - SLIST_FOREACH(jmi, &root_jobmgr->submgrs, sle) { - if (unlikely(jmi->shutting_down)) { - continue; - } else if (strcasecmp(jmi->name, where) == 0) { - goto jm_found; - } else if (strcasecmp(jmi->name, VPROCMGR_SESSION_BACKGROUND) == 0 && pid1_magic) { - SLIST_FOREACH(jmi2, &jmi->submgrs, sle) { - if (strcasecmp(jmi2->name, where) == 0) { - jmi = jmi2; - goto jm_found; - } - } - } - } - -jm_found: - return jmi; -} - -kern_return_t -job_mig_move_subset(job_t j, mach_port_t target_subset, name_t session_type, mach_port_t audit_session, uint64_t flags) -{ - mach_msg_type_number_t l2l_i, l2l_port_cnt = 0; - mach_port_array_t l2l_ports = NULL; - mach_port_t reqport, rcvright; - kern_return_t kr = 1; - launch_data_t out_obj_array = NULL; - struct ldcred *ldc = runtime_get_caller_creds(); - jobmgr_t jmr = NULL; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (job_mig_intran2(root_jobmgr, target_subset, ldc->pid)) { - job_log(j, LOG_ERR, "Moving a session to ourself is bogus."); - - kr = BOOTSTRAP_NOT_PRIVILEGED; - goto out; - } - - job_log(j, LOG_DEBUG, "Move subset attempt: 0x%x", target_subset); - - kr = _vproc_grab_subset(target_subset, &reqport, &rcvright, &out_obj_array, &l2l_ports, &l2l_port_cnt); - - if (!job_assumes(j, kr == 0)) { - goto out; - } - - launchd_assert(launch_data_array_get_count(out_obj_array) == l2l_port_cnt); - - if (!job_assumes(j, (jmr = jobmgr_new(j->mgr, reqport, rcvright, false, session_type, false, audit_session)) != NULL)) { - kr = BOOTSTRAP_NO_MEMORY; - goto out; - } - - jmr->properties |= BOOTSTRAP_PROPERTY_MOVEDSUBSET; - - /* This is a hack. We should be doing this in jobmgr_new(), but since we're in the middle of - * processing an IPC request, we'll do this action before the new job manager can get any IPC - * requests. This serialization is guaranteed since we are single-threaded in that respect. - */ - if( flags & LAUNCH_GLOBAL_ON_DEMAND ) { - /* This is so awful. */ - /* Remove the job from its current job manager. */ - LIST_REMOVE(j, sle); - LIST_REMOVE(j, pid_hash_sle); - - /* Put the job into the target job manager. */ - LIST_INSERT_HEAD(&jmr->jobs, j, sle); - LIST_INSERT_HEAD(&jmr->active_jobs[ACTIVE_JOB_HASH(j->p)], j, pid_hash_sle); - - j->mgr = jmr; - job_set_global_on_demand(j, true); - - if( !j->holds_ref ) { - j->holds_ref = true; - runtime_add_ref(); - } - } - - for (l2l_i = 0; l2l_i < l2l_port_cnt; l2l_i++) { - launch_data_t tmp, obj_at_idx; - struct machservice *ms; - job_t j_for_service; - const char *serv_name; - pid_t target_pid; - bool serv_perpid; - - job_assumes(j, obj_at_idx = launch_data_array_get_index(out_obj_array, l2l_i)); - job_assumes(j, tmp = launch_data_dict_lookup(obj_at_idx, TAKE_SUBSET_PID)); - target_pid = (pid_t)launch_data_get_integer(tmp); - job_assumes(j, tmp = launch_data_dict_lookup(obj_at_idx, TAKE_SUBSET_PERPID)); - serv_perpid = launch_data_get_bool(tmp); - job_assumes(j, tmp = launch_data_dict_lookup(obj_at_idx, TAKE_SUBSET_NAME)); - serv_name = launch_data_get_string(tmp); - - j_for_service = jobmgr_find_by_pid(jmr, target_pid, true); - - if (unlikely(!j_for_service)) { - /* The PID probably exited */ - job_assumes(j, launchd_mport_deallocate(l2l_ports[l2l_i]) == KERN_SUCCESS); - continue; - } - - if (likely(ms = machservice_new(j_for_service, serv_name, &l2l_ports[l2l_i], serv_perpid))) { - job_log(j, LOG_DEBUG, "Importing %s into new bootstrap.", serv_name); - machservice_request_notifications(ms); - } - } - - kr = 0; - -out: - if (out_obj_array) { - launch_data_free(out_obj_array); - } - - if (l2l_ports) { - mig_deallocate((vm_address_t)l2l_ports, l2l_port_cnt * sizeof(l2l_ports[0])); - } - - if (kr == 0) { - if (target_subset) { - job_assumes(j, launchd_mport_deallocate(target_subset) == KERN_SUCCESS); - } - } else if (jmr) { - jobmgr_shutdown(jmr); - } - - return kr; -} - -kern_return_t -job_mig_init_session(job_t j, name_t session_type, mach_port_t audit_session) -{ - job_t j2; - - kern_return_t kr = BOOTSTRAP_NO_MEMORY; - if (j->mgr->session_initialized) { - job_log(j, LOG_ERR, "Tried to initialize an already setup session!"); - kr = BOOTSTRAP_NOT_PRIVILEGED; - } else if (strcmp(session_type, VPROCMGR_SESSION_LOGINWINDOW) == 0) { - jobmgr_t jmi; - - /* - * 5330262 - * - * We're working around LoginWindow and the WindowServer. - * - * In practice, there is only one LoginWindow session. Unfortunately, for certain - * scenarios, the WindowServer spawns loginwindow, and in those cases, it frequently - * spawns a replacement loginwindow session before cleaning up the previous one. - * - * We're going to use the creation of a new LoginWindow context as a clue that the - * previous LoginWindow context is on the way out and therefore we should just - * kick-start the shutdown of it. - */ - - SLIST_FOREACH(jmi, &root_jobmgr->submgrs, sle) { - if (unlikely(jmi->shutting_down)) { - continue; - } else if (strcasecmp(jmi->name, session_type) == 0) { - jobmgr_shutdown(jmi); - break; - } - } - } - - jobmgr_log(j->mgr, LOG_DEBUG, "Initializing as %s", session_type); - strcpy(j->mgr->name_init, session_type); - - if (job_assumes(j, (j2 = jobmgr_init_session(j->mgr, session_type, false)))) { - j2->audit_session = audit_session; - job_assumes(j, job_dispatch(j2, true)); - kr = BOOTSTRAP_SUCCESS; - } - - return kr; -} - -kern_return_t -job_mig_switch_to_session(job_t j, mach_port_t requestor_port, name_t session_name, mach_port_t audit_session, mach_port_t *new_bsport) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - if (!jobmgr_assumes(root_jobmgr, j != NULL)) { - jobmgr_log(root_jobmgr, LOG_ERR, "%s() called with NULL job: PID %d", __func__, ldc->pid); - return BOOTSTRAP_NO_MEMORY; - } - - job_log(j, LOG_DEBUG, "Job wants to move to %s session.", session_name); - - if( !job_assumes(j, pid1_magic == false) ) { - job_log(j, LOG_WARNING, "Switching sessions is not allowed in the system Mach bootstrap."); - return BOOTSTRAP_NOT_PRIVILEGED; - } - - if( !j->anonymous ) { - job_log(j, LOG_NOTICE, "Non-anonymous job tried to switch sessions. Please use LimitLoadToSessionType instead."); - return BOOTSTRAP_NOT_PRIVILEGED; - } - - jobmgr_t target_jm = jobmgr_find_by_name(root_jobmgr, session_name); - if( target_jm == j->mgr ) { - job_log(j, LOG_DEBUG, "Job is already in its desired session (%s).", session_name); - *new_bsport = target_jm->jm_port; - return BOOTSTRAP_SUCCESS; - } - - if( !target_jm ) { - target_jm = jobmgr_new(j->mgr, requestor_port, MACH_PORT_NULL, false, session_name, false, audit_session); - if( !target_jm ) { - mach_port_deallocate(mach_task_self(), audit_session); - } else { - target_jm->properties |= BOOTSTRAP_PROPERTY_IMPLICITSUBSET; - } - } - - if( !job_assumes(j, target_jm != NULL) ) { - job_log(j, LOG_WARNING, "Could not find %s session!", session_name); - return BOOTSTRAP_NO_MEMORY; - } - - /* Remove the job from it's current job manager. */ - LIST_REMOVE(j, sle); - LIST_REMOVE(j, pid_hash_sle); - - job_t ji = NULL, jit = NULL; - LIST_FOREACH_SAFE( ji, &j->mgr->global_env_jobs, global_env_sle, jit ) { - if( ji == j ) { - LIST_REMOVE(ji, global_env_sle); - break; - } - } - - /* Put the job into the target job manager. */ - LIST_INSERT_HEAD(&target_jm->jobs, j, sle); - LIST_INSERT_HEAD(&target_jm->active_jobs[ACTIVE_JOB_HASH(j->p)], j, pid_hash_sle); - - if( ji ) { - LIST_INSERT_HEAD(&target_jm->global_env_jobs, j, global_env_sle); - } - - /* Move our Mach services over if we're not in a flat namespace. */ - if( !g_flat_mach_namespace && !SLIST_EMPTY(&j->machservices) ) { - struct machservice *msi = NULL, *msit = NULL; - SLIST_FOREACH_SAFE( msi, &j->machservices, sle, msit ) { - LIST_REMOVE(msi, name_hash_sle); - LIST_INSERT_HEAD(&target_jm->ms_hash[hash_ms(msi->name)], msi, name_hash_sle); - } - } - - j->mgr = target_jm; - - if( !j->holds_ref ) { - /* Anonymous jobs which move around are particularly interesting to us, so we want to - * stick around while they're still around. - * For example, login calls into the PAM launchd module, which moves the process into - * the StandardIO session by default. So we'll hold a reference on that job to prevent - * ourselves from going away. - */ - j->holds_ref = true; - runtime_add_ref(); - } - - *new_bsport = target_jm->jm_port; - - return KERN_SUCCESS; -} - -kern_return_t -job_mig_take_subset(job_t j, mach_port_t *reqport, mach_port_t *rcvright, - vm_offset_t *outdata, mach_msg_type_number_t *outdataCnt, - mach_port_array_t *portsp, unsigned int *ports_cnt) -{ - launch_data_t tmp_obj, tmp_dict, outdata_obj_array = NULL; - mach_port_array_t ports = NULL; - unsigned int cnt = 0, cnt2 = 0; - size_t packed_size; - struct machservice *ms; - jobmgr_t jm; - job_t ji; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - jm = j->mgr; - - if (unlikely(!pid1_magic)) { - job_log(j, LOG_ERR, "Only the system launchd will transfer Mach sub-bootstraps."); - return BOOTSTRAP_NOT_PRIVILEGED; - } - if (unlikely(jobmgr_parent(jm) == NULL)) { - job_log(j, LOG_ERR, "Root Mach bootstrap cannot be transferred."); - return BOOTSTRAP_NOT_PRIVILEGED; - } - if (unlikely(strcasecmp(jm->name, VPROCMGR_SESSION_AQUA) == 0)) { - job_log(j, LOG_ERR, "Cannot transfer a setup GUI session."); - return BOOTSTRAP_NOT_PRIVILEGED; - } - if (unlikely(!j->anonymous)) { - job_log(j, LOG_ERR, "Only the anonymous job can transfer Mach sub-bootstraps."); - return BOOTSTRAP_NOT_PRIVILEGED; - } - - job_log(j, LOG_DEBUG, "Transferring sub-bootstrap to the per session launchd."); - - outdata_obj_array = launch_data_alloc(LAUNCH_DATA_ARRAY); - if (!job_assumes(j, outdata_obj_array)) { - goto out_bad; - } - - *outdataCnt = 20 * 1024 * 1024; - mig_allocate(outdata, *outdataCnt); - if (!job_assumes(j, *outdata != 0)) { - return 1; - } - - LIST_FOREACH(ji, &j->mgr->jobs, sle) { - if (!ji->anonymous) { - continue; - } - SLIST_FOREACH(ms, &ji->machservices, sle) { - cnt++; - } - } - - mig_allocate((vm_address_t *)&ports, cnt * sizeof(ports[0])); - if (!job_assumes(j, ports != NULL)) { - goto out_bad; - } - - LIST_FOREACH(ji, &j->mgr->jobs, sle) { - if (!ji->anonymous) { - continue; - } - - SLIST_FOREACH(ms, &ji->machservices, sle) { - if (job_assumes(j, (tmp_dict = launch_data_alloc(LAUNCH_DATA_DICTIONARY)))) { - job_assumes(j, launch_data_array_set_index(outdata_obj_array, tmp_dict, cnt2)); - } else { - goto out_bad; - } - - if (job_assumes(j, (tmp_obj = launch_data_new_string(machservice_name(ms))))) { - job_assumes(j, launch_data_dict_insert(tmp_dict, tmp_obj, TAKE_SUBSET_NAME)); - } else { - goto out_bad; - } - - if (job_assumes(j, (tmp_obj = launch_data_new_integer((ms->job->p))))) { - job_assumes(j, launch_data_dict_insert(tmp_dict, tmp_obj, TAKE_SUBSET_PID)); - } else { - goto out_bad; - } - - if (job_assumes(j, (tmp_obj = launch_data_new_bool((ms->per_pid))))) { - job_assumes(j, launch_data_dict_insert(tmp_dict, tmp_obj, TAKE_SUBSET_PERPID)); - } else { - goto out_bad; - } - - ports[cnt2] = machservice_port(ms); - - /* Increment the send right by one so we can shutdown the jobmgr cleanly */ - jobmgr_assumes(jm, (errno = mach_port_mod_refs(mach_task_self(), ports[cnt2], MACH_PORT_RIGHT_SEND, 1)) == 0); - cnt2++; - } - } - - job_assumes(j, cnt == cnt2); - - runtime_ktrace0(RTKT_LAUNCHD_DATA_PACK); - packed_size = launch_data_pack(outdata_obj_array, (void *)*outdata, *outdataCnt, NULL, NULL); - if (!job_assumes(j, packed_size != 0)) { - goto out_bad; - } - - launch_data_free(outdata_obj_array); - - *portsp = ports; - *ports_cnt = cnt; - - *reqport = jm->req_port; - *rcvright = jm->jm_port; - - jm->req_port = 0; - jm->jm_port = 0; - - workaround_5477111 = j; - - jobmgr_shutdown(jm); - - return BOOTSTRAP_SUCCESS; - -out_bad: - if (outdata_obj_array) { - launch_data_free(outdata_obj_array); - } - if (*outdata) { - mig_deallocate(*outdata, *outdataCnt); - } - if (ports) { - mig_deallocate((vm_address_t)ports, cnt * sizeof(ports[0])); - } - - return BOOTSTRAP_NO_MEMORY; -} - -kern_return_t -job_mig_subset(job_t j, mach_port_t requestorport, mach_port_t *subsetportp) -{ - int bsdepth = 0; - jobmgr_t jmr; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - jmr = j->mgr; - - while ((jmr = jobmgr_parent(jmr)) != NULL) { - bsdepth++; - } - - /* Since we use recursion, we need an artificial depth for subsets */ - if (unlikely(bsdepth > 100)) { - job_log(j, LOG_ERR, "Mach sub-bootstrap create request failed. Depth greater than: %d", bsdepth); - return BOOTSTRAP_NO_MEMORY; - } - - char name[NAME_MAX]; - snprintf(name, sizeof(name), "%s[%i].subset.%i", j->anonymous ? j->prog : j->label, j->p, MACH_PORT_INDEX(requestorport)); - - if (!job_assumes(j, (jmr = jobmgr_new(j->mgr, requestorport, MACH_PORT_NULL, false, name, true, j->audit_session)) != NULL)) { - if (unlikely(requestorport == MACH_PORT_NULL)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - return BOOTSTRAP_NO_MEMORY; - } - - *subsetportp = jmr->jm_port; - jmr->properties |= BOOTSTRAP_PROPERTY_EXPLICITSUBSET; - - /* A job could create multiple subsets, so only add a reference the first time - * it does so we don't have to keep a count. - */ - if( j->anonymous && !j->holds_ref ) { - j->holds_ref = true; - runtime_add_ref(); - } - - job_log(j, LOG_DEBUG, "Job created a subset named \"%s\"", jmr->name); - return BOOTSTRAP_SUCCESS; -} - -kern_return_t -job_mig_embedded_wait(job_t j, name_t targetlabel, integer_t *waitstatus) -{ - job_t otherj; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(!(otherj = job_find(targetlabel)))) { - return BOOTSTRAP_UNKNOWN_SERVICE; - } - - *waitstatus = j->last_exit_status; - - return 0; -} - -kern_return_t -job_mig_kickstart(job_t j, name_t targetlabel, pid_t *out_pid, mach_port_t *out_name_port, mach_port_t *obsrvr_port, unsigned int flags) -{ - struct ldcred *ldc = runtime_get_caller_creds(); - job_t otherj; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(!(otherj = job_find(targetlabel)))) { - return BOOTSTRAP_UNKNOWN_SERVICE; - } - -#if TARGET_OS_EMBEDDED - bool allow_non_root_kickstart = j->username && otherj->username && ( strcmp(j->username, otherj->username) == 0 ); -#else - bool allow_non_root_kickstart = false; -#endif - - if( ldc->euid != 0 && ldc->euid != geteuid() && !allow_non_root_kickstart ) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - - if( otherj->p && (flags & VPROCFLAG_STALL_JOB_EXEC) ) { - return BOOTSTRAP_SERVICE_ACTIVE; - } - - otherj->stall_before_exec = ( flags & VPROCFLAG_STALL_JOB_EXEC ); - otherj = job_dispatch(otherj, true); - - if (!job_assumes(j, otherj && otherj->p)) { - /* Clear this flag if we failed to start the job. */ - otherj->stall_before_exec = false; - return BOOTSTRAP_NO_MEMORY; - } - - /* If any of these proceeding steps fail, we return an error to the client. - * the problem is that, if the client has requested the job be stalled before - * exec(2), the client won't be able to uncork the fork(2), leaving the job - * forever stalled until the client tries again and we successfully start - * the job. - * - * See for more about the implications. - * - * Fortunately, these next actions should pretty much never fail. In the - * future, we should look at cleaning up after these failures if the job - * was started in a stalled state. - */ - - kern_return_t kr = task_name_for_pid(mach_task_self(), otherj->p, out_name_port); - if (!job_assumes(j, kr == 0)) { - return kr; - } - - if (!job_setup_machport(otherj)) { - return BOOTSTRAP_NO_MEMORY; - } - - *obsrvr_port = otherj->j_port; - *out_pid = otherj->p; - - return 0; -} - -kern_return_t -job_mig_wait(job_t j, mach_port_t srp, integer_t *waitstatus) -{ -#if 0 - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - return job_handle_mpm_wait(j, srp, waitstatus); -#else - if( false ) { - /* To make the compiler happy. */ - job_handle_mpm_wait(NULL, MACH_PORT_NULL, NULL); - } - struct ldcred *ldc = runtime_get_caller_creds(); - job_t calling_j = jobmgr_find_by_pid(j->mgr, ldc->pid, true); - - return job_mig_wait2(calling_j, j, srp, waitstatus, true); -#endif -} - -kern_return_t -job_mig_wait2(job_t j, job_t target_j, mach_port_t srp, integer_t *status, boolean_t legacy) -{ - if( !launchd_assumes(j != NULL) ) { - return BOOTSTRAP_NO_MEMORY; - } - if( !launchd_assumes(target_j != NULL) ) { - return BOOTSTRAP_NO_MEMORY; - } - if( !launchd_assumes(status != NULL) ) { - return BOOTSTRAP_NO_MEMORY; - } - - /* See rdar://problem/7084138 for why we do the second part of this check. - * Basically, since Finder, Dock and SystemUIServer are now real launchd - * jobs, they don't get removed after exiting, like legacy LaunchServices - * jobs do. So there's a race. coreservicesd came in asking for the exit - * status after we'd relaunched Finder, so Finder's PID isn't 0. - * - * So we check to make sure the target job isn't a LaunchServices job and - * that the request is coming through the legacy path (mpm_wait()). If so, - * we return the last exit status, regardless of the current PID value. - */ - if( target_j->p == 0 || (!target_j->legacy_LS_job && legacy) ) { - *status = target_j->last_exit_status; - return BOOTSTRAP_SUCCESS; - } - - if( !job_assumes(j, waiting4exit_new(target_j, srp, legacy) == true) ) { - return BOOTSTRAP_NO_MEMORY; - } - - return MIG_NO_REPLY; -} - -kern_return_t -job_mig_uncork_fork(job_t j) -{ - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(!j->stall_before_exec)) { - job_log(j, LOG_WARNING, "Attempt to uncork a job that isn't in the middle of a fork()."); - return 1; - } - - job_uncork_fork(j); - j->stall_before_exec = false; - return 0; -} - -kern_return_t -job_mig_spawn(job_t j, vm_offset_t indata, mach_msg_type_number_t indataCnt, mach_port_t audit_session, pid_t *child_pid, mach_port_t *obsvr_port) -{ - launch_data_t input_obj = NULL; - size_t data_offset = 0; - struct ldcred *ldc = runtime_get_caller_creds(); - job_t jr; - - if (!launchd_assumes(j != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (unlikely(j->deny_job_creation)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } - -#if HAVE_SANDBOX - if (unlikely(sandbox_check(ldc->pid, "job-creation", SANDBOX_FILTER_NONE) > 0)) { - return BOOTSTRAP_NOT_PRIVILEGED; - } -#endif - - if (unlikely(pid1_magic && ldc->euid && ldc->uid)) { - job_log(j, LOG_DEBUG, "Punting spawn to per-user-context"); - return VPROC_ERR_TRY_PER_USER; - } - - if (!job_assumes(j, indataCnt != 0)) { - return 1; - } - - runtime_ktrace0(RTKT_LAUNCHD_DATA_UNPACK); - if (!job_assumes(j, (input_obj = launch_data_unpack((void *)indata, indataCnt, NULL, 0, &data_offset, NULL)) != NULL)) { - return 1; - } - - jobmgr_t target_jm = jobmgr_find_by_name(j->mgr, NULL); - if( !jobmgr_assumes(j->mgr, target_jm != NULL) ) { - jobmgr_log(j->mgr, LOG_NOTICE, "%s() can't find its session!", __func__); - return 1; - } - - jr = jobmgr_import2(target_jm ?: j->mgr, input_obj); - - if (!job_assumes(j, jr != NULL)) { - switch (errno) { - case EEXIST: - return BOOTSTRAP_NAME_IN_USE; - default: - return BOOTSTRAP_NO_MEMORY; - } - } - - if (pid1_magic) { - jr->mach_uid = ldc->uid; - } - - jr->legacy_LS_job = true; - jr->abandon_pg = true; - jr->stall_before_exec = jr->wait4debugger; - jr->wait4debugger = false; - jr->audit_session = audit_session; - uuid_clear(jr->expected_audit_uuid); - - jr = job_dispatch(jr, true); - - if (!job_assumes(j, jr != NULL)) { - return BOOTSTRAP_NO_MEMORY; - } - - if (!job_assumes(jr, jr->p)) { - job_remove(jr); - return BOOTSTRAP_NO_MEMORY; - } - - if (!job_setup_machport(jr)) { - job_remove(jr); - return BOOTSTRAP_NO_MEMORY; - } - - job_log(jr, LOG_DEBUG, "Spawned by PID %u: %s", j->p, j->label); - - *child_pid = jr->p; - *obsvr_port = jr->j_port; - - mig_deallocate(indata, indataCnt); - - return BOOTSTRAP_SUCCESS; -} - -void -jobmgr_init(bool sflag) -{ - const char *root_session_type = pid1_magic ? VPROCMGR_SESSION_SYSTEM : VPROCMGR_SESSION_BACKGROUND; - SLIST_INIT(&s_curious_jobs); - LIST_INIT(&s_needing_sessions); - - launchd_assert((root_jobmgr = jobmgr_new(NULL, MACH_PORT_NULL, MACH_PORT_NULL, sflag, root_session_type, false, MACH_PORT_NULL)) != NULL); - - uint32_t fflags = NOTE_ATTRIB | NOTE_LINK | NOTE_REVOKE | NOTE_EXTEND | NOTE_WRITE; - s_no_hang_fd = open("/dev/autofs_nowait", O_EVTONLY | O_NONBLOCK); - if( likely(s_no_hang_fd == -1) ) { - if( jobmgr_assumes(root_jobmgr, (s_no_hang_fd = open("/dev", O_EVTONLY | O_NONBLOCK)) != -1) ) { - jobmgr_assumes(root_jobmgr, kevent_mod((uintptr_t)s_no_hang_fd, EVFILT_VNODE, EV_ADD, fflags, 0, root_jobmgr) != -1); - } - } - s_no_hang_fd = _fd(s_no_hang_fd); -} - -size_t -our_strhash(const char *s) -{ - size_t c, r = 5381; - - /* djb2 - * This algorithm was first reported by Dan Bernstein many years ago in comp.lang.c - */ - - while ((c = *s++)) { - r = ((r << 5) + r) + c; /* hash*33 + c */ - } - - return r; -} - -size_t -hash_label(const char *label) -{ - return our_strhash(label) % LABEL_HASH_SIZE; -} - -size_t -hash_ms(const char *msstr) -{ - return our_strhash(msstr) % MACHSERVICE_HASH_SIZE; -} - -bool -waiting4removal_new(job_t j, mach_port_t rp) -{ - struct waiting_for_removal *w4r; - - if (!job_assumes(j, (w4r = malloc(sizeof(struct waiting_for_removal))) != NULL)) { - return false; - } - - w4r->reply_port = rp; - - SLIST_INSERT_HEAD(&j->removal_watchers, w4r, sle); - - return true; -} - -void -waiting4removal_delete(job_t j, struct waiting_for_removal *w4r) -{ - job_assumes(j, job_mig_send_signal_reply(w4r->reply_port, 0) == 0); - - SLIST_REMOVE(&j->removal_watchers, w4r, waiting_for_removal, sle); - - free(w4r); -} - -bool -waiting4exit_new(job_t j, mach_port_t rp, bool legacy) -{ - struct waiting_for_exit *w4e = NULL; - if( !job_assumes(j, (w4e = malloc(sizeof(struct waiting_for_exit))) != NULL) ) { - return false; - } - - w4e->rp = rp; - w4e->legacy = legacy; - LIST_INSERT_HEAD(&j->exit_watchers, w4e, sle); - - return true; -} - -void -waiting4exit_delete(job_t j, struct waiting_for_exit *w4e) -{ - if( !w4e->legacy ) { - job_assumes(j, job_mig_wait2_reply(w4e->rp, KERN_SUCCESS, j->last_exit_status, false) == KERN_SUCCESS); - } else { - job_assumes(j, job_mig_wait_reply(w4e->rp, KERN_SUCCESS, j->last_exit_status) == KERN_SUCCESS); - } - - LIST_REMOVE(w4e, sle); - - free(w4e); -} - -size_t -get_kern_max_proc(void) -{ - int mib[] = { CTL_KERN, KERN_MAXPROC }; - int max = 100; - size_t max_sz = sizeof(max); - - launchd_assumes(sysctl(mib, 2, &max, &max_sz, NULL, 0) != -1); - - return max; -} - -/* See rdar://problem/6271234 */ -void -eliminate_double_reboot(void) -{ - if( unlikely(!pid1_magic) ) { - return; - } - - struct stat sb; - const char *argv[] = { _PATH_BSHELL, "/etc/rc.deferred_install", NULL }; - char *try_again = "Will try again at next boot."; - int result = ~0; - - if( unlikely(stat(argv[1], &sb) != -1) ) { - jobmgr_log(root_jobmgr, LOG_DEBUG | LOG_CONSOLE, "Going to run deferred install script."); - - int wstatus; - pid_t p; - - jobmgr_assumes(root_jobmgr, (errno = posix_spawnp(&p, argv[0], NULL, NULL, (char **)argv, environ)) == 0); - - if (errno) { - jobmgr_log(root_jobmgr, LOG_WARNING | LOG_CONSOLE, "Couldn't run deferred install script! %s", try_again); - goto out; - } - - if( !jobmgr_assumes(root_jobmgr, waitpid(p, &wstatus, 0) != -1) ) { - jobmgr_log(root_jobmgr, LOG_WARNING | LOG_CONSOLE, "Couldn't confirm that deferred install script exited successfully! %s", try_again); - goto out; - } - - if( jobmgr_assumes(root_jobmgr, WIFEXITED(wstatus) != 0) ) { - if( jobmgr_assumes(root_jobmgr, (result = WEXITSTATUS(wstatus)) == EXIT_SUCCESS) ) { - jobmgr_log(root_jobmgr, LOG_DEBUG | LOG_CONSOLE, "Deferred install script completed successfully."); - } else { - jobmgr_log(root_jobmgr, LOG_WARNING | LOG_CONSOLE, "Deferred install script exited with status %d. %s", WEXITSTATUS(wstatus), try_again); - } - } else { - jobmgr_log(root_jobmgr, LOG_WARNING | LOG_CONSOLE, "Confirmed that deferred install script exited, but couldn't confirm that it was successful. %s", try_again); - } - } -out: - if( result == 0 ) { - /* If the unlink(2) was to fail, it would be most likely fail with EBUSY. All the other - * failure cases for unlink(2) don't apply when we're running under PID 1 and have verified - * that the file exists. Outside of someone deliberately messing with us (like if /etc/rc.deferredinstall - * is actually a looping sym-link or a mount point for a filesystem) and I/O errors, we should be good. - */ - if( !jobmgr_assumes(root_jobmgr, unlink(argv[1]) != -1) ) { - jobmgr_log(root_jobmgr, LOG_WARNING | LOG_CONSOLE, "Deferred install script couldn't be removed!"); - } - } -} - -static void -simulate_pid1_crash(void) -{ - if( pid1_magic && g_simulate_pid1_crash ) { - runtime_syslog(LOG_EMERG | LOG_CONSOLE, "About to simulate a crash."); - raise(SIGSEGV); - } -} - -void -jetsam_property_setup(launch_data_t obj, const char *key, job_t j) -{ - job_log(j, LOG_DEBUG, "Setting Jetsam properties for job..."); - if( strcasecmp(key, LAUNCH_JOBKEY_JETSAMPRIORITY) == 0 && launch_data_get_type(obj) == LAUNCH_DATA_INTEGER ) { - j->jetsam_priority = (typeof(j->jetsam_priority))launch_data_get_integer(obj); - job_log(j, LOG_DEBUG, "Priority: %d", j->jetsam_priority); - } else if( strcasecmp(key, LAUNCH_JOBKEY_JETSAMMEMORYLIMIT) == 0 && launch_data_get_type(obj) == LAUNCH_DATA_INTEGER ) { - j->jetsam_memlimit = (typeof(j->jetsam_memlimit))launch_data_get_integer(obj); - job_log(j, LOG_DEBUG, "Memory limit: %d", j->jetsam_memlimit); - } else if( strcasecmp(key, LAUNCH_KEY_JETSAMFRONTMOST) == 0 ) { - /* Ignore. We only recognize this key so we don't complain when we get SpringBoard's request. - * You can't set this in a plist. - */ - } else if( strcasecmp(key, LAUNCH_KEY_JETSAMLABEL) == 0 ) { - /* Ignore. This key is present in SpringBoard's request dictionary, so we don't want to - * complain about it. - */ - } else { - job_log(j, LOG_ERR, "Unknown Jetsam key: %s", key); - } - - if( unlikely(!j->jetsam_properties) ) { - j->jetsam_properties = true; - LIST_INSERT_HEAD(&j->mgr->jetsam_jobs, j, jetsam_sle); - j->mgr->jetsam_jobs_cnt++; - } -} - -int -launchd_set_jetsam_priorities(launch_data_t priorities) -{ - if( !launchd_assumes(launch_data_get_type(priorities) == LAUNCH_DATA_ARRAY) ) { - return EINVAL; - } - - jobmgr_t jm = NULL; -#if !TARGET_OS_EMBEDDED - /* For testing. */ - jm = jobmgr_find_by_name(root_jobmgr, VPROCMGR_SESSION_AQUA); - if( !launchd_assumes(jm != NULL) ) { - return EINVAL; - } -#else - /* Since this is for embedded, we can assume that the root job manager holds the Jetsam jobs. */ - jm = root_jobmgr; - - if( !g_embedded_privileged_action ) { - return EPERM; - } -#endif - - size_t npris = launch_data_array_get_count(priorities); - - job_t ji = NULL; - size_t i = 0; - for( i = 0; i < npris; i++ ) { - launch_data_t ldi = launch_data_array_get_index(priorities, i); - if( !launchd_assumes(launch_data_get_type(ldi) == LAUNCH_DATA_DICTIONARY) ) { - continue; - } - - launch_data_t label = NULL; - if( !launchd_assumes(label = launch_data_dict_lookup(ldi, LAUNCH_KEY_JETSAMLABEL)) ) { - continue; - } - const char *_label = launch_data_get_string(label); - - ji = job_find(_label); - if( !launchd_assumes(ji != NULL) ) { - continue; - } - - launch_data_dict_iterate(ldi, (void (*)(launch_data_t, const char *, void *))jetsam_property_setup, ji); - - launch_data_t frontmost = NULL; - if( (frontmost = launch_data_dict_lookup(ldi, LAUNCH_KEY_JETSAMFRONTMOST)) && launch_data_get_type(frontmost) == LAUNCH_DATA_BOOL ) { - ji->jetsam_frontmost = launch_data_get_bool(frontmost); - } - } - - i = 0; - job_t *jobs = (job_t *)calloc(jm->jetsam_jobs_cnt, sizeof(job_t)); - if( launchd_assumes(jobs != NULL) ) { - LIST_FOREACH( ji, &jm->jetsam_jobs, jetsam_sle ) { - if( ji->p ) { - jobs[i] = ji; - i++; - } - } - } - - size_t totalpris = i; - - int result = EINVAL; - - /* It is conceivable that there could be no Jetsam jobs running. */ - if( totalpris > 0 ) { - /* Yay blocks! */ - qsort_b((void *)jobs, totalpris, sizeof(job_t), ^ int (const void *lhs, const void *rhs) { - job_t _lhs = *(job_t *)lhs; - job_t _rhs = *(job_t *)rhs; - /* Sort in descending order. (Priority correlates to the soonishness with which you will be killed.) */ - if( _lhs->jetsam_priority > _rhs->jetsam_priority ) { - return -1; - } else if( _lhs->jetsam_priority < _rhs->jetsam_priority ) { - return 1; - } - - return 0; - }); - - jetsam_priority_entry_t *jpris = (jetsam_priority_entry_t *)calloc(totalpris, sizeof(jetsam_priority_entry_t)); - if( !launchd_assumes(jpris != NULL) ) { - result = ENOMEM; - } else { - for( i = 0; i < totalpris; i++ ) { - jpris[i].pid = jobs[i]->p; /* Subject to time-of-use vs. time-of-check, obviously. */ - jpris[i].flags |= jobs[i]->jetsam_frontmost ? kJetsamFlagsFrontmost : 0; - jpris[i].hiwat_pages = jobs[i]->jetsam_memlimit; - } - - launchd_assumes((result = sysctlbyname("kern.memorystatus_priority_list", NULL, NULL, &jpris[0], totalpris * sizeof(jetsam_priority_entry_t))) != -1); - result = result != 0 ? errno : 0; - - free(jpris); - } - } - - if( jobs ) { - free(jobs); - } - - return result; -}