+ proc_t p;
+
+ if ((p = current_proc())!= (proc_t)0) {
+ strlcpy(buf, &p->p_comm[0], size);
+ }
+}
+
+void
+proc_signal(int pid, int signum)
+{
+ proc_t p;
+
+ if ((p = proc_find(pid)) != PROC_NULL) {
+ psignal(p, signum);
+ proc_rele(p);
+ }
+}
+
+int
+proc_issignal(int pid, sigset_t mask)
+{
+ proc_t p;
+ int error=0;
+
+ if ((p = proc_find(pid)) != PROC_NULL) {
+ error = proc_pendingsignals(p, mask);
+ proc_rele(p);
+ }
+
+ return(error);
+}
+
+int
+proc_noremotehang(proc_t p)
+{
+ int retval = 0;
+
+ if (p)
+ retval = p->p_flag & P_NOREMOTEHANG;
+ return(retval? 1: 0);
+
+}
+
+int
+proc_exiting(proc_t p)
+{
+ int retval = 0;
+
+ if (p)
+ retval = p->p_lflag & P_LEXIT;
+ return(retval? 1: 0);
+}
+
+int
+proc_forcequota(proc_t p)
+{
+ int retval = 0;
+
+ if (p)
+ retval = p->p_flag & P_FORCEQUOTA;
+ return(retval? 1: 0);
+
+}
+
+int
+proc_tbe(proc_t p)
+{
+ int retval = 0;
+
+ if (p)
+ retval = p->p_flag & P_TBE;
+ return(retval? 1: 0);
+
+}
+
+int
+proc_suser(proc_t p)
+{
+ kauth_cred_t my_cred;
+ int error;
+
+ my_cred = kauth_cred_proc_ref(p);
+ error = suser(my_cred, &p->p_acflag);
+ kauth_cred_unref(&my_cred);
+ return(error);
+}
+
+/*
+ * Obtain the first thread in a process
+ *
+ * XXX This is a bad thing to do; it exists predominantly to support the
+ * XXX use of proc_t's in places that should really be using
+ * XXX thread_t's instead. This maintains historical behaviour, but really
+ * XXX needs an audit of the context (proxy vs. not) to clean up.
+ */
+thread_t
+proc_thread(proc_t proc)
+{
+ uthread_t uth = TAILQ_FIRST(&proc->p_uthlist);
+
+ if (uth != NULL)
+ return(uth->uu_context.vc_thread);
+
+ return(NULL);
+}
+
+kauth_cred_t
+proc_ucred(proc_t p)
+{
+ return(p->p_ucred);
+}
+
+int
+proc_is64bit(proc_t p)
+{
+ return(IS_64BIT_PROCESS(p));
+}
+
+void
+bsd_set_dependency_capable(task_t task)
+{
+ proc_t p = get_bsdtask_info(task);
+
+ if (p) {
+ OSBitOrAtomic(P_DEPENDENCY_CAPABLE, (UInt32 *)&p->p_flag);
+ }
+}
+
+
+/* LP64todo - figure out how to identify 64-bit processes if NULL procp */
+int
+IS_64BIT_PROCESS(proc_t p)
+{
+ if (p && (p->p_flag & P_LP64))
+ return(1);
+ else
+ return(0);
+}
+
+/*
+ * Locate a process by number
+ */
+proc_t
+pfind_locked(pid_t pid)
+{
+ proc_t p;
+#ifdef DEBUG
+ proc_t q;
+#endif
+
+ if (!pid)
+ return (kernproc);
+
+ for (p = PIDHASH(pid)->lh_first; p != 0; p = p->p_hash.le_next) {
+ if (p->p_pid == pid) {
+#ifdef DEBUG
+ for (q = p->p_hash.le_next; q != 0; q = q->p_hash.le_next) {
+ if ((p !=q) && (q->p_pid == pid))
+ panic("two procs with same pid %x:%x:%d:%d\n", (unsigned int)p, (unsigned int)q, p->p_pid, q->p_pid);
+ }
+#endif
+ return (p);
+ }
+ }
+ return (NULL);
+}
+
+/*
+ * Locate a zombie by PID
+ */
+__private_extern__ proc_t
+pzfind(pid_t pid)
+{
+ proc_t p;
+
+
+ proc_list_lock();
+
+ for (p = zombproc.lh_first; p != 0; p = p->p_list.le_next)
+ if (p->p_pid == pid)
+ break;
+
+ proc_list_unlock();
+
+ return (p);
+}
+
+/*
+ * Locate a process group by number
+ */
+
+struct pgrp *
+pgfind(pid_t pgid)
+{
+ struct pgrp * pgrp;
+
+ proc_list_lock();
+ pgrp = pgfind_internal(pgid);
+ if ((pgrp == NULL) || ((pgrp->pg_listflags & PGRP_FLAG_TERMINATE) != 0))
+ pgrp = PGRP_NULL;
+ else
+ pgrp->pg_refcount++;
+ proc_list_unlock();
+ return(pgrp);
+}
+
+
+
+struct pgrp *
+pgfind_internal(pid_t pgid)
+{
+ struct pgrp *pgrp;
+
+ for (pgrp = PGRPHASH(pgid)->lh_first; pgrp != 0; pgrp = pgrp->pg_hash.le_next)
+ if (pgrp->pg_id == pgid)
+ return (pgrp);
+ return (NULL);
+}
+
+void
+pg_rele(struct pgrp * pgrp)
+{
+ if(pgrp == PGRP_NULL)
+ return;
+ pg_rele_dropref(pgrp);
+}
+
+void
+pg_rele_dropref(struct pgrp * pgrp)
+{
+ proc_list_lock();
+ if ((pgrp->pg_refcount == 1) && ((pgrp->pg_listflags & PGRP_FLAG_TERMINATE) == PGRP_FLAG_TERMINATE)) {
+ proc_list_unlock();
+ pgdelete_dropref(pgrp);
+ return;
+ }
+
+ pgrp->pg_refcount--;
+ proc_list_unlock();
+}
+
+struct session *
+session_find_internal(pid_t sessid)
+{
+ struct session *sess;
+
+ for (sess = SESSHASH(sessid)->lh_first; sess != 0; sess = sess->s_hash.le_next)
+ if (sess->s_sid == sessid)
+ return (sess);
+ return (NULL);
+}
+
+
+/*
+ * Make a new process ready to become a useful member of society by making it
+ * visible in all the right places and initialize its own lists to empty.
+ *
+ * Parameters: parent The parent of the process to insert
+ * child The child process to insert
+ *
+ * Returns: (void)
+ *
+ * Notes: Insert a child process into the parents process group, assign
+ * the child the parent process pointer and PPID of the parent,
+ * place it on the parents p_children list as a sibling,
+ * initialize its own child list, place it in the allproc list,
+ * insert it in the proper hash bucket, and initialize its
+ * event list.
+ */
+void
+pinsertchild(proc_t parent, proc_t child)
+{
+ struct pgrp * pg;
+
+ LIST_INIT(&child->p_children);
+ TAILQ_INIT(&child->p_evlist);
+ child->p_pptr = parent;
+ child->p_ppid = parent->p_pid;
+
+ pg = proc_pgrp(parent);
+ pgrp_add(pg, parent, child);
+ pg_rele(pg);
+
+ proc_list_lock();
+ parent->p_childrencnt++;
+ LIST_INSERT_HEAD(&parent->p_children, child, p_sibling);
+
+ LIST_INSERT_HEAD(&allproc, child, p_list);
+ /* mark the completion of proc creation */
+ child->p_listflag &= ~P_LIST_INCREATE;
+
+ proc_list_unlock();
+
+}
+
+/*
+ * Move p to a new or existing process group (and session)
+ *
+ * Returns: 0 Success
+ * ESRCH No such process
+ */
+int
+enterpgrp(proc_t p, pid_t pgid, int mksess)
+{
+ struct pgrp *pgrp;
+ struct pgrp *mypgrp;
+ struct session * procsp;
+
+ pgrp = pgfind(pgid);
+ mypgrp = proc_pgrp(p);
+ procsp = proc_session(p);
+
+#if DIAGNOSTIC
+ if (pgrp != NULL && mksess) /* firewalls */
+ panic("enterpgrp: setsid into non-empty pgrp");
+ if (SESS_LEADER(p, procsp))
+ panic("enterpgrp: session leader attempted setpgrp");
+#endif
+ if (pgrp == PGRP_NULL) {
+ pid_t savepid = p->p_pid;
+ proc_t np = PROC_NULL;
+ /*
+ * new process group
+ */
+#if DIAGNOSTIC
+ if (p->p_pid != pgid)
+ panic("enterpgrp: new pgrp and pid != pgid");
+#endif
+ MALLOC_ZONE(pgrp, struct pgrp *, sizeof(struct pgrp), M_PGRP,
+ M_WAITOK);
+ if (pgrp == NULL)
+ panic("enterpgrp: M_PGRP zone depleted");
+ if ((np = proc_find(savepid)) == NULL || np != p) {
+ if (np != PROC_NULL)
+ proc_rele(np);
+ if (mypgrp != PGRP_NULL)
+ pg_rele(mypgrp);
+ if (procsp != SESSION_NULL)
+ session_rele(procsp);
+ FREE_ZONE(pgrp, sizeof(struct pgrp), M_PGRP);
+ return (ESRCH);
+ }
+ proc_rele(np);
+ if (mksess) {
+ struct session *sess;
+
+ /*
+ * new session
+ */
+ MALLOC_ZONE(sess, struct session *,
+ sizeof(struct session), M_SESSION, M_WAITOK);
+ if (sess == NULL)
+ panic("enterpgrp: M_SESSION zone depleted");
+ sess->s_leader = p;
+ sess->s_sid = p->p_pid;
+ sess->s_count = 1;
+ sess->s_ttyvp = NULL;
+ sess->s_ttyp = NULL;
+ sess->s_flags = 0;
+ sess->s_listflags = 0;
+ sess->s_ttypgrpid = NO_PID;
+ lck_mtx_init(&sess->s_mlock, proc_lck_grp, proc_lck_attr);
+ bcopy(procsp->s_login, sess->s_login,
+ sizeof(sess->s_login));
+ OSBitAndAtomic(~((uint32_t)P_CONTROLT), (UInt32 *)&p->p_flag);
+ proc_list_lock();
+ LIST_INSERT_HEAD(SESSHASH(sess->s_sid), sess, s_hash);
+ proc_list_unlock();
+ pgrp->pg_session = sess;
+#if DIAGNOSTIC
+ if (p != current_proc())
+ panic("enterpgrp: mksession and p != curproc");
+#endif
+ } else {
+ proc_list_lock();
+ pgrp->pg_session = procsp;
+
+ if ((pgrp->pg_session->s_listflags & (S_LIST_TERM | S_LIST_DEAD)) != 0)
+ panic("enterpgrp: providing ref to terminating session ");
+ pgrp->pg_session->s_count++;
+ proc_list_unlock();
+ }
+ pgrp->pg_id = pgid;
+ lck_mtx_init(&pgrp->pg_mlock, proc_lck_grp, proc_lck_attr);
+ LIST_INIT(&pgrp->pg_members);
+ pgrp->pg_membercnt = 0;
+ pgrp->pg_jobc = 0;
+ proc_list_lock();
+ pgrp->pg_refcount = 1;
+ pgrp->pg_listflags = 0;
+ LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
+ proc_list_unlock();
+ } else if (pgrp == mypgrp) {
+ pg_rele(pgrp);
+ if (mypgrp != NULL)
+ pg_rele(mypgrp);
+ if (procsp != SESSION_NULL)
+ session_rele(procsp);
+ return (0);
+ }
+
+ if (procsp != SESSION_NULL)
+ session_rele(procsp);
+ /*
+ * Adjust eligibility of affected pgrps to participate in job control.
+ * Increment eligibility counts before decrementing, otherwise we
+ * could reach 0 spuriously during the first call.
+ */
+ fixjobc(p, pgrp, 1);
+ fixjobc(p, mypgrp, 0);
+
+ if(mypgrp != PGRP_NULL)
+ pg_rele(mypgrp);
+ pgrp_replace(p, pgrp);
+ pg_rele(pgrp);
+
+ return(0);
+}
+
+/*
+ * remove process from process group
+ */
+int
+leavepgrp(proc_t p)
+{
+
+ pgrp_remove(p);
+ return (0);
+}
+
+/*
+ * delete a process group
+ */
+static void
+pgdelete_dropref(struct pgrp *pgrp)
+{
+ struct tty * ttyp;
+ boolean_t fstate;
+ int emptypgrp = 1;
+ struct session *sessp;
+
+
+ pgrp_lock(pgrp);
+ if (pgrp->pg_membercnt != 0) {
+ emptypgrp = 0;
+ }
+ pgrp_unlock(pgrp);
+
+ proc_list_lock();
+ pgrp->pg_refcount--;
+ if ((emptypgrp == 0) || (pgrp->pg_membercnt != 0)) {
+ proc_list_unlock();
+ return;
+ }
+
+ pgrp->pg_listflags |= PGRP_FLAG_TERMINATE;
+
+ if (pgrp->pg_refcount > 0) {
+ proc_list_unlock();
+ return;
+ }
+
+ pgrp->pg_listflags |= PGRP_FLAG_DEAD;
+ LIST_REMOVE(pgrp, pg_hash);
+
+ proc_list_unlock();
+
+ fstate = thread_funnel_set(kernel_flock, TRUE);
+
+ ttyp = pgrp->pg_session->s_ttyp;
+ if ((ttyp != NULL) && (pgrp->pg_session->s_ttyp->t_pgrp == pgrp)) {
+ pgrp->pg_session->s_ttyp->t_pgrp = NULL;
+ pgrp->pg_session->s_ttypgrpid = NO_PID;
+ }
+ (void) thread_funnel_set(kernel_flock, fstate);
+
+ proc_list_lock();
+
+ sessp = pgrp->pg_session;
+ if ((sessp->s_listflags & (S_LIST_TERM | S_LIST_DEAD)) != 0)
+ panic("pg_deleteref: manipulating refs of already terminating session");
+ if (--sessp->s_count == 0) {
+ if ((sessp->s_listflags & (S_LIST_TERM | S_LIST_DEAD)) != 0)
+ panic("pg_deleteref: terminating already terminated session");
+ sessp->s_listflags |= S_LIST_TERM;
+ ttyp = sessp->s_ttyp;
+ LIST_REMOVE(sessp, s_hash);
+ proc_list_unlock();
+ fstate = thread_funnel_set(kernel_flock, TRUE);
+ if (ttyp != NULL && ttyp->t_session == sessp)
+ ttyp->t_session = NULL;
+ (void) thread_funnel_set(kernel_flock, fstate);
+ proc_list_lock();
+ sessp->s_listflags |= S_LIST_DEAD;
+ if (sessp->s_count != 0)
+ panic("pg_deleteref: freeing session in use");
+ proc_list_unlock();
+ lck_mtx_destroy(&sessp->s_mlock, proc_lck_grp);
+ FREE_ZONE(sessp, sizeof(struct session), M_SESSION);
+ } else
+ proc_list_unlock();
+ lck_mtx_destroy(&pgrp->pg_mlock, proc_lck_grp);
+ FREE_ZONE(pgrp, sizeof(*pgrp), M_PGRP);
+}
+
+
+/*
+ * Adjust pgrp jobc counters when specified process changes process group.
+ * We count the number of processes in each process group that "qualify"
+ * the group for terminal job control (those with a parent in a different
+ * process group of the same session). If that count reaches zero, the
+ * process group becomes orphaned. Check both the specified process'
+ * process group and that of its children.
+ * entering == 0 => p is leaving specified group.
+ * entering == 1 => p is entering specified group.
+ */
+int
+fixjob_callback(proc_t p, void * arg)
+{
+ struct fixjob_iterargs *fp;
+ struct pgrp * pg, *hispg;
+ struct session * mysession, *hissess;
+ int entering;
+
+ fp = (struct fixjob_iterargs *)arg;
+ pg = fp->pg;
+ mysession = fp->mysession;
+ entering = fp->entering;
+
+ hispg = proc_pgrp(p);
+ hissess = proc_session(p);
+
+ if ((hispg != pg) &&
+ (hissess == mysession)) {
+ pgrp_lock(hispg);
+ if (entering) {
+ hispg->pg_jobc++;
+ pgrp_unlock(hispg);
+ } else if (--hispg->pg_jobc == 0) {
+ pgrp_unlock(hispg);
+ orphanpg(hispg);
+ } else
+ pgrp_unlock(hispg);
+ }
+ if (hissess != SESSION_NULL)
+ session_rele(hissess);
+ if (hispg != PGRP_NULL)
+ pg_rele(hispg);
+
+ return(PROC_RETURNED);
+}
+
+void
+fixjobc(proc_t p, struct pgrp *pgrp, int entering)
+{
+ struct pgrp *hispgrp = PGRP_NULL;
+ struct session *hissess = SESSION_NULL;
+ struct session *mysession = pgrp->pg_session;
+ proc_t parent;
+ struct fixjob_iterargs fjarg;
+
+ parent = proc_parent(p);
+ if (parent != PROC_NULL) {
+ hispgrp = proc_pgrp(parent);
+ hissess = proc_session(parent);
+ proc_rele(parent);
+ }
+
+
+ /*
+ * Check p's parent to see whether p qualifies its own process
+ * group; if so, adjust count for p's process group.
+ */
+ if ((hispgrp != pgrp) &&
+ (hissess == mysession)) {
+ pgrp_lock(pgrp);
+ if (entering) {
+ pgrp->pg_jobc++;
+ pgrp_unlock(pgrp);
+ }else if (--pgrp->pg_jobc == 0) {
+ pgrp_unlock(pgrp);
+ orphanpg(pgrp);
+ } else
+ pgrp_unlock(pgrp);
+ }
+
+ if (hissess != SESSION_NULL)
+ session_rele(hissess);
+ if (hispgrp != PGRP_NULL)
+ pg_rele(hispgrp);
+
+ /*
+ * Check this process' children to see whether they qualify
+ * their process groups; if so, adjust counts for children's
+ * process groups.
+ */
+ fjarg.pg = pgrp;
+ fjarg.mysession = mysession;
+ fjarg.entering = entering;
+ proc_childrenwalk(p, fixjob_callback, &fjarg);
+}
+
+/*
+ * A process group has become orphaned;
+ * if there are any stopped processes in the group,
+ * hang-up all process in that group.
+ */
+static void
+orphanpg(struct pgrp * pgrp)
+{
+ proc_t p;
+ pid_t * pid_list;
+ int count, pidcount, i, alloc_count;
+
+ if (pgrp == PGRP_NULL)
+ return;
+ count = 0;
+ pgrp_lock(pgrp);
+ for (p = pgrp->pg_members.lh_first; p != 0; p = p->p_pglist.le_next) {
+ if (p->p_stat == SSTOP) {
+ for (p = pgrp->pg_members.lh_first; p != 0;
+ p = p->p_pglist.le_next)
+ count++;
+ break; /* ??? stops after finding one.. */
+ }
+ }
+ pgrp_unlock(pgrp);
+
+ count += 20;
+ if (count > hard_maxproc)
+ count = hard_maxproc;
+ alloc_count = count * sizeof(pid_t);
+ pid_list = (pid_t *)kalloc(alloc_count);
+ bzero(pid_list, alloc_count);
+
+ pidcount = 0;
+ pgrp_lock(pgrp);
+ for (p = pgrp->pg_members.lh_first; p != 0;
+ p = p->p_pglist.le_next) {
+ if (p->p_stat == SSTOP) {
+ for (p = pgrp->pg_members.lh_first; p != 0;
+ p = p->p_pglist.le_next) {
+ pid_list[pidcount] = p->p_pid;
+ pidcount++;
+ if (pidcount >= count)
+ break;
+ }
+ break; /* ??? stops after finding one.. */
+ }
+ }
+ pgrp_unlock(pgrp);
+
+ if (pidcount == 0)
+ goto out;
+
+
+ for (i = 0; i< pidcount; i++) {
+ /* No handling or proc0 */
+ if (pid_list[i] == 0)
+ continue;
+ p = proc_find(pid_list[i]);
+ if (p) {
+ proc_transwait(p, 0);
+ pt_setrunnable(p);
+ psignal(p, SIGHUP);
+ psignal(p, SIGCONT);
+ proc_rele(p);
+ }
+ }
+out:
+ kfree(pid_list, alloc_count);
+ return;
+}
+
+
+
+/* XXX should be __private_extern__ */
+int
+proc_is_classic(proc_t p)
+{
+ return (p->p_flag & P_TRANSLATED) ? 1 : 0;
+}
+
+/* XXX Why does this function exist? Need to kill it off... */
+proc_t
+current_proc_EXTERNAL(void)
+{
+ return (current_proc());
+}
+
+/*
+ * proc_core_name(name, uid, pid)
+ * Expand the name described in corefilename, using name, uid, and pid.
+ * corefilename is a printf-like string, with three format specifiers:
+ * %N name of process ("name")
+ * %P process id (pid)
+ * %U user id (uid)
+ * For example, "%N.core" is the default; they can be disabled completely
+ * by using "/dev/null", or all core files can be stored in "/cores/%U/%N-%P".
+ * This is controlled by the sysctl variable kern.corefile (see above).
+ */
+__private_extern__ int
+proc_core_name(const char *name, uid_t uid, pid_t pid, char *cf_name,
+ size_t cf_name_len)
+{
+ const char *format, *appendstr;
+ char id_buf[11]; /* Buffer for pid/uid -- max 4B */
+ size_t i, l, n;
+
+ if (cf_name == NULL)
+ goto toolong;
projects / apple / xnu.git / blobdiff