syslogd.tproj/syslogd.c

   1 /*
   2  * Copyright (c) 2004-2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <TargetConditionals.h>
  25
  26 #include <assert.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <mach/mach.h>
  32 #include <mach/mach_error.h>
  33 #include <mach/mach_time.h>
  34 #include <servers/bootstrap.h>
  35 #include <sys/types.h>
  36 #include <sys/socket.h>
  37 #include <sys/sysctl.h>
  38 #include <sys/stat.h>
  39 #include <sys/fcntl.h>
  40 #include <sys/errno.h>
  41 #include <sys/queue.h>
  42 #include <sys/time.h>
  43 #include <sys/un.h>
  44 #include <pthread.h>
  45 #include <dirent.h>
  46 #include <dlfcn.h>
  47 #include <libgen.h>
  48 #include <notify.h>
  49 #include <notify_keys.h>
  50 #include <utmpx.h>
  51 #include <asl_private.h>
  52 #include <pwd.h>
  53
  54 #if !TARGET_OS_IPHONE
  55 #include <quarantine.h>
  56 #endif
  57 #include "daemon.h"
  58
  59 #define SERVICE_NAME "com.apple.system.logger"
  60 #define SERVER_STATUS_ERROR -1
  61 #define SERVER_STATUS_INACTIVE 0
  62 #define SERVER_STATUS_ACTIVE 1
  63 #define SERVER_STATUS_ON_DEMAND 2
  64
  65 #define BILLION 1000000000
  66
  67 #define NOTIFY_DELAY 1
  68
  69 extern int _malloc_no_asl_log;
  70
  71 #if TARGET_IPHONE_SIMULATOR
  72 const char *_path_pidfile;
  73 const char *_path_syslogd_log;
  74 #endif
  75
  76 /* global */
  77 struct global_s global;
  78
  79 #if !TARGET_IPHONE_SIMULATOR
  80 /* Input Modules */
  81 int klog_in_init(void);
  82 int klog_in_reset(void);
  83 int klog_in_close(void);
  84 static int activate_klog_in = 1;
  85 #endif
  86
  87 int bsd_in_init(void);
  88 int bsd_in_reset(void);
  89 int bsd_in_close(void);
  90 static int activate_bsd_in = 1;
  91
  92 #if !TARGET_IPHONE_SIMULATOR
  93 int udp_in_init(void);
  94 int udp_in_reset(void);
  95 int udp_in_close(void);
  96 static int activate_udp_in = 1;
  97
  98 /* Output Modules */
  99 int bsd_out_init(void);
 100 int bsd_out_reset(void);
 101 int bsd_out_close(void);
 102 static int activate_bsd_out = 1;
 103 #endif
 104
 105 int asl_action_init(void);
 106 int asl_action_reset(void);
 107 int asl_action_close(void);
 108 static int activate_asl_action = 1;
 109
 110 #if !TARGET_IPHONE_SIMULATOR
 111 /* Interactive Module */
 112 int remote_init(void);
 113 int remote_reset(void);
 114 int remote_close(void);
 115 static int remote_enabled = 0;
 116 #endif
 117
 118 extern void database_server();
 119
 120 static void
 121 init_modules()
 122 {
 123 #if !TARGET_IPHONE_SIMULATOR
 124         module_t *m_klog_in, *m_bsd_out, *m_udp_in, *m_remote;
 125 #endif
 126         module_t *m_asl, *m_bsd_in;
 127         int m = 0;
 128
 129         /* ASL module (configured by /etc/asl.conf) */
 130         m_asl = (module_t *)calloc(1, sizeof(module_t));
 131         if (m_asl == NULL)
 132         {
 133                 asldebug("alloc failed (init_modules asl_action)\n");
 134                 exit(1);
 135         }
 136
 137         m_asl->name = "asl_action";
 138         m_asl->enabled = activate_asl_action;
 139         m_asl->init = asl_action_init;
 140         m_asl->reset = asl_action_reset;
 141         m_asl->close = asl_action_close;
 142
 143         if (m_asl->enabled) m_asl->init();
 144
 145 #if !TARGET_IPHONE_SIMULATOR
 146         /* BSD output module (configured by /etc/syslog.conf) */
 147         m_bsd_out = (module_t *)calloc(1, sizeof(module_t));
 148         if (m_bsd_out == NULL)
 149         {
 150                 asldebug("alloc failed (init_modules bsd_out)\n");
 151                 exit(1);
 152         }
 153
 154         m_bsd_out->name = "bsd_out";
 155         m_bsd_out->enabled = activate_bsd_out;
 156         m_bsd_out->init = bsd_out_init;
 157         m_bsd_out->reset = bsd_out_reset;
 158         m_bsd_out->close = bsd_out_close;
 159
 160         if (m_bsd_out->enabled)
 161         {
 162                 m_bsd_out->init();
 163                 global.bsd_out_enabled = 1;
 164         }
 165
 166         /* kernel input module */
 167         m_klog_in = (module_t *)calloc(1, sizeof(module_t));
 168         if (m_klog_in == NULL)
 169         {
 170                 asldebug("alloc failed (init_modules klog_in)\n");
 171                 exit(1);
 172         }
 173
 174         m_klog_in->name = "klog_in";
 175         m_klog_in->enabled = activate_klog_in;
 176         m_klog_in->init = klog_in_init;
 177         m_klog_in->reset = klog_in_reset;
 178         m_klog_in->close = klog_in_close;
 179
 180         if (m_klog_in->enabled) m_klog_in->init();
 181 #endif
 182
 183         /* BSD (UNIX domain socket) input module */
 184         m_bsd_in = (module_t *)calloc(1, sizeof(module_t));
 185         if (m_bsd_in == NULL)
 186         {
 187                 asldebug("alloc failed (init_modules bsd_in)\n");
 188                 exit(1);
 189         }
 190
 191         m_bsd_in->name = "bsd_in";
 192         m_bsd_in->enabled = activate_bsd_in;
 193         m_bsd_in->init = bsd_in_init;
 194         m_bsd_in->reset = bsd_in_reset;
 195         m_bsd_in->close = bsd_in_close;
 196
 197         if (m_bsd_in->enabled) m_bsd_in->init();
 198
 199 #if !TARGET_IPHONE_SIMULATOR
 200         /* network (syslog protocol) input module */
 201         m_udp_in = (module_t *)calloc(1, sizeof(module_t));
 202         if (m_udp_in == NULL)
 203         {
 204                 asldebug("alloc failed (init_modules udp_in)\n");
 205                 exit(1);
 206         }
 207
 208         m_udp_in->name = "udp_in";
 209         m_udp_in->enabled = activate_udp_in;
 210         m_udp_in->init = udp_in_init;
 211         m_udp_in->reset = udp_in_reset;
 212         m_udp_in->close = udp_in_close;
 213
 214         if (m_udp_in->enabled) m_udp_in->init();
 215
 216         /* remote (iOS support) module */
 217         m_remote = (module_t *)calloc(1, sizeof(module_t));
 218         if (m_remote == NULL)
 219         {
 220                 asldebug("alloc failed (init_modules remote)\n");
 221                 exit(1);
 222         }
 223
 224         m_remote->name = "remote";
 225         m_remote->enabled = remote_enabled;
 226         m_remote->init = remote_init;
 227         m_remote->reset = remote_reset;
 228         m_remote->close = remote_close;
 229
 230         if (m_remote->enabled) m_remote->init();
 231 #endif /* TARGET_IPHONE_SIMULATOR */
 232
 233         /* save modules in global.module array */
 234 #if TARGET_IPHONE_SIMULATOR
 235         global.module_count = 2;
 236 #else
 237         global.module_count = 6;
 238 #endif
 239         global.module = (module_t **)calloc(global.module_count, sizeof(module_t *));
 240         if (global.module == NULL)
 241         {
 242                 asldebug("alloc failed (init_modules)\n");
 243                 exit(1);
 244         }
 245
 246         global.module[m++] = m_asl;
 247         global.module[m++] = m_bsd_in;
 248 #if !TARGET_IPHONE_SIMULATOR
 249         global.module[m++] = m_bsd_out;
 250         global.module[m++] = m_klog_in;
 251         global.module[m++] = m_udp_in;
 252         global.module[m++] = m_remote;
 253 #endif
 254 }
 255
 256 static void
 257 writepid(int *first)
 258 {
 259         struct stat sb;
 260         FILE *fp;
 261
 262         if (first != NULL)
 263         {
 264                 *first = 1;
 265                 memset(&sb, 0, sizeof(struct stat));
 266                 if (stat(_PATH_PIDFILE, &sb) == 0)
 267                 {
 268                         if (S_ISREG(sb.st_mode)) *first = 0;
 269                 }
 270         }
 271
 272         fp = fopen(_PATH_PIDFILE, "w");
 273         if (fp != NULL)
 274         {
 275                 fprintf(fp, "%d\n", global.pid);
 276                 fclose(fp);
 277         }
 278 }
 279
 280 void
 281 launch_config()
 282 {
 283         launch_data_t tmp, pdict;
 284         kern_return_t status;
 285
 286         tmp = launch_data_new_string(LAUNCH_KEY_CHECKIN);
 287         global.launch_dict = launch_msg(tmp);
 288         launch_data_free(tmp);
 289
 290         if (global.launch_dict == NULL)
 291         {
 292                 asldebug("%d launchd checkin failed\n", global.pid);
 293                 exit(1);
 294         }
 295
 296         tmp = launch_data_dict_lookup(global.launch_dict, LAUNCH_JOBKEY_MACHSERVICES);
 297         if (tmp == NULL)
 298         {
 299                 asldebug("%d launchd lookup of LAUNCH_JOBKEY_MACHSERVICES failed\n", global.pid);
 300                 exit(1);
 301         }
 302
 303         pdict = launch_data_dict_lookup(tmp, SERVICE_NAME);
 304         if (pdict == NULL)
 305         {
 306                 asldebug("%d launchd lookup of SERVICE_NAME failed\n", global.pid);
 307                 exit(1);
 308         }
 309
 310         global.server_port = launch_data_get_machport(pdict);
 311
 312         /* port for receiving MACH_NOTIFY_DEAD_NAME notifications */
 313         status = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &(global.dead_session_port));
 314         if (status != KERN_SUCCESS)
 315         {
 316                 asldebug("mach_port_allocate dead_session_port failed: %d", status);
 317                 exit(1);
 318         }
 319
 320         status = mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_PORT_SET, &(global.listen_set));
 321         if (status != KERN_SUCCESS)
 322         {
 323                 asldebug("mach_port_allocate listen_set failed: %d", status);
 324                 exit(1);
 325         }
 326
 327         status = mach_port_move_member(mach_task_self(), global.server_port, global.listen_set);
 328         if (status != KERN_SUCCESS)
 329         {
 330                 asldebug("mach_port_move_member server_port failed: %d", status);
 331                 exit(1);
 332         }
 333
 334         status = mach_port_move_member(mach_task_self(), global.dead_session_port, global.listen_set);
 335         if (status != KERN_SUCCESS)
 336         {
 337                 asldebug("mach_port_move_member dead_session_port failed (%u)", status);
 338                 exit(1);
 339         }
 340 }
 341
 342 void
 343 config_debug(int enable, const char *path)
 344 {
 345         OSSpinLockLock(&global.lock);
 346
 347         global.debug = enable;
 348         free(global.debug_file);
 349         global.debug_file = NULL;
 350         if (path != NULL) global.debug_file = strdup(path);
 351
 352         OSSpinLockUnlock(&global.lock);
 353 }
 354
 355 void
 356 config_data_store(int type, uint32_t file_max, uint32_t memory_max, uint32_t str_memory_max)
 357 {
 358         pthread_mutex_lock(global.db_lock);
 359
 360         if (global.dbtype & DB_TYPE_FILE)
 361         {
 362                 asl_store_close(global.file_db);
 363                 global.file_db = NULL;
 364         }
 365
 366         if (global.dbtype & DB_TYPE_MEMORY)
 367         {
 368                 asl_memory_close(global.memory_db);
 369                 global.memory_db = NULL;
 370         }
 371
 372         global.dbtype = type;
 373         global.db_file_max = file_max;
 374         global.db_memory_max = memory_max;
 375         global.db_memory_str_max = str_memory_max;
 376
 377         pthread_mutex_unlock(global.db_lock);
 378 }
 379
 380 void
 381 write_boot_log(int first)
 382 {
 383         int mib[2] = {CTL_KERN, KERN_BOOTTIME};
 384         size_t len;
 385         asl_msg_t *msg;
 386         char buf[256];
 387         struct utmpx utx;
 388
 389         if (first == 0)
 390         {
 391                 /* syslogd restart */
 392                 msg = asl_msg_new(ASL_TYPE_MSG);
 393                 if (msg == NULL) return;
 394
 395                 asl_msg_set_key_val(msg, ASL_KEY_SENDER, "syslogd");
 396                 asl_msg_set_key_val(msg, ASL_KEY_FACILITY, "daemon");
 397                 asl_msg_set_key_val(msg, ASL_KEY_LEVEL, "Notice");
 398                 asl_msg_set_key_val(msg, ASL_KEY_UID, "0");
 399                 asl_msg_set_key_val(msg, ASL_KEY_GID, "0");
 400                 snprintf(buf, sizeof(buf), "%u", global.pid);
 401                 asl_msg_set_key_val(msg, ASL_KEY_PID, buf);
 402                 asl_msg_set_key_val(msg, ASL_KEY_MSG, "--- syslogd restarted ---");
 403                 process_message(msg, SOURCE_INTERNAL);
 404                 return;
 405         }
 406
 407         bzero(&utx, sizeof(utx));
 408         utx.ut_type = BOOT_TIME;
 409         utx.ut_pid = 1;
 410
 411         /* get the boot time */
 412         len = sizeof(struct timeval);
 413         if (sysctl(mib, 2, &utx.ut_tv, &len, NULL, 0) < 0)
 414         {
 415                 gettimeofday(&utx.ut_tv, NULL);
 416         }
 417
 418         pututxline(&utx);
 419
 420         msg = asl_msg_new(ASL_TYPE_MSG);
 421         if (msg == NULL) return;
 422
 423         asl_msg_set_key_val(msg, ASL_KEY_SENDER, "bootlog");
 424         asl_msg_set_key_val(msg, ASL_KEY_FACILITY, "com.apple.system.utmpx");
 425         asl_msg_set_key_val(msg, ASL_KEY_LEVEL, "Notice");
 426         asl_msg_set_key_val(msg, ASL_KEY_UID, "0");
 427         asl_msg_set_key_val(msg, ASL_KEY_GID, "0");
 428         asl_msg_set_key_val(msg, ASL_KEY_PID, "0");
 429         snprintf(buf, sizeof(buf), "BOOT_TIME %lu %u", (unsigned long)utx.ut_tv.tv_sec, (unsigned int)utx.ut_tv.tv_usec);
 430         asl_msg_set_key_val(msg, ASL_KEY_MSG, buf);
 431         asl_msg_set_key_val(msg, "ut_id", "0x00 0x00 0x00 0x00");
 432         asl_msg_set_key_val(msg, "ut_pid", "1");
 433         asl_msg_set_key_val(msg, "ut_type", "2");
 434         snprintf(buf, sizeof(buf), "%lu", (unsigned long)utx.ut_tv.tv_sec);
 435         asl_msg_set_key_val(msg, ASL_KEY_TIME, buf);
 436         asl_msg_set_key_val(msg, "ut_tv.tv_sec", buf);
 437         snprintf(buf, sizeof(buf), "%u", (unsigned int)utx.ut_tv.tv_usec);
 438         asl_msg_set_key_val(msg, "ut_tv.tv_usec", buf);
 439         snprintf(buf, sizeof(buf), "%u%s", (unsigned int)utx.ut_tv.tv_usec, (utx.ut_tv.tv_usec == 0) ? "" : "000");
 440         asl_msg_set_key_val(msg, ASL_KEY_TIME_NSEC, buf);
 441
 442         process_message(msg, SOURCE_INTERNAL);
 443 }
 444
 445 int
 446 main(int argc, const char *argv[])
 447 {
 448         int32_t i;
 449         uint64_t master_val;
 450 #if !TARGET_IPHONE_SIMULATOR
 451         int network_change_token;
 452 #endif
 453         int quota_file_token, asl_db_token, master_token;
 454         char tstr[32], *notify_key;
 455         time_t now;
 456         int first_syslogd_start = 1;
 457
 458 #if TARGET_IPHONE_SIMULATOR
 459         const char *sim_log_dir = getenv("SIMULATOR_LOG_ROOT");
 460         const char *sim_resource_dir = getenv("SIMULATOR_SHARED_RESOURCES_DIRECTORY");
 461         char *p;
 462
 463         /* assert is evil */
 464         assert(sim_log_dir && sim_resource_dir);
 465
 466         asprintf((char **)&_path_syslogd_log, "%s/syslogd.log", sim_log_dir);
 467         asprintf((char **)&_path_pidfile, "%s/var/run/syslog.pid", sim_resource_dir);
 468
 469         if (_path_syslogd_log == NULL) _path_syslogd_log = "/tmp/syslogd.log";
 470         else mkpath_np(sim_log_dir, 0755);
 471
 472         if (_path_pidfile == NULL)
 473         {
 474                 _path_pidfile = "/tmp/syslog.pid";
 475         }
 476         else
 477         {
 478                 p = strrchr(_path_pidfile, '/');
 479                 *p = '\0';
 480                 mkpath_np(_path_pidfile, 0755);
 481                 *p = '/';
 482         }
 483 #endif
 484
 485 #if TARGET_OS_IPHONE
 486         /*
 487          * Reset owner, group, and permissions in /var/mobile/Library/Logs
 488          * in case something created them incorrectly.  syslogd was
 489          * guilty of this in the past, creating them with owner root.
 490          */
 491
 492         uid_t __mUserUID = 501;
 493         gid_t __mUserGID = 501;
 494         struct passwd * pw = getpwnam("mobile");
 495
 496         if (pw) {
 497                 __mUserUID = pw->pw_uid;
 498                 __mUserGID = pw->pw_gid;
 499         }
 500
 501         asl_secure_chown_chmod_dir("/private/var/mobile/Library/Logs", __mUserUID, __mUserGID, 0755);
 502         asl_secure_chown_chmod_dir("/private/var/mobile/Library/Logs/CrashReporter", __mUserUID, __mUserGID, 0755);
 503         asl_secure_chown_chmod_dir("/private/var/mobile/Library/Logs/CrashReporter/DiagnosticLogs", __mUserUID, __mUserGID, 0755);
 504 #endif
 505
 506         /* Set I/O policy */
 507         setiopolicy_np(IOPOL_TYPE_DISK, IOPOL_SCOPE_PROCESS, IOPOL_PASSIVE);
 508
 509 #if !TARGET_OS_IPHONE
 510         /* Set Quarantine */
 511         qtn_proc_t qp = qtn_proc_alloc();
 512         qtn_proc_set_identifier(qp, "com.apple.syslogd");
 513         qtn_proc_set_flags(qp, QTN_FLAG_SANDBOX | QTN_FLAG_HARD);
 514         qtn_proc_apply_to_self(qp);
 515         qtn_proc_free(qp);
 516 #endif
 517
 518         memset(&global, 0, sizeof(struct global_s));
 519
 520         global.db_lock = (pthread_mutex_t *)calloc(1, sizeof(pthread_mutex_t));
 521         pthread_mutex_init(global.db_lock, NULL);
 522
 523         /*
 524          * Create work queue, but suspend until output modules are initialized.
 525          */
 526         global.work_queue = dispatch_queue_create("Work Queue", NULL);
 527         dispatch_suspend(global.work_queue);
 528
 529         init_globals();
 530
 531 #if TARGET_OS_EMBEDDED
 532         remote_enabled = 1;
 533         activate_bsd_out = 0;
 534 #endif
 535
 536         /* prevent malloc from calling ASL on error */
 537         _malloc_no_asl_log = 1;
 538
 539         /* first pass sets up default configurations */
 540         for (i = 1; i < argc; i++)
 541         {
 542                 if (streq(argv[i], "-config"))
 543                 {
 544                         if (((i + 1) < argc) && (argv[i+1][0] != '-'))
 545                         {
 546                                 i++;
 547                                 if (streq(argv[i], "mac"))
 548                                 {
 549                                         global.dbtype = DB_TYPE_FILE;
 550                                         global.db_file_max = 25600000;
 551                                 }
 552                                 else if (streq(argv[i], "appletv"))
 553                                 {
 554                                         global.dbtype = DB_TYPE_FILE;
 555                                         global.db_file_max = 10240000;
 556                                 }
 557                                 else if (streq(argv[i], "iphone"))
 558                                 {
 559 #if TARGET_IPHONE_SIMULATOR
 560                                         global.dbtype = DB_TYPE_FILE;
 561                                         global.db_file_max = 25600000;
 562 #else
 563                                         global.dbtype = DB_TYPE_MEMORY;
 564                                         remote_enabled = 1;
 565 #endif
 566                                 }
 567                         }
 568                 }
 569         }
 570
 571         for (i = 1; i < argc; i++)
 572         {
 573                 if (streq(argv[i], "-d"))
 574                 {
 575                         global.debug = 1;
 576                         if (((i+1) < argc) && (argv[i+1][0] != '-')) global.debug_file = strdup(argv[++i]);
 577                 }
 578                 else if (streq(argv[i], "-db"))
 579                 {
 580                         if (((i + 1) < argc) && (argv[i+1][0] != '-'))
 581                         {
 582                                 i++;
 583                                 if (streq(argv[i], "file"))
 584                                 {
 585                                         global.dbtype |= DB_TYPE_FILE;
 586                                         if (((i + 1) < argc) && (argv[i+1][0] != '-')) global.db_file_max = atol(argv[++i]);
 587                                 }
 588                                 else if (streq(argv[i], "memory"))
 589                                 {
 590                                         global.dbtype |= DB_TYPE_MEMORY;
 591                                         if (((i + 1) < argc) && (argv[i+1][0] != '-')) global.db_memory_max = atol(argv[++i]);
 592                                 }
 593                         }
 594                 }
 595                 else if (streq(argv[i], "-m"))
 596                 {
 597                         if ((i + 1) < argc) global.mark_time = 60 * atoll(argv[++i]);
 598                 }
 599                 else if (streq(argv[i], "-utmp_ttl"))
 600                 {
 601                         if ((i + 1) < argc) global.utmp_ttl = atol(argv[++i]);
 602                 }
 603                 else if (streq(argv[i], "-mps_limit"))
 604                 {
 605                         if ((i + 1) < argc) global.mps_limit = atol(argv[++i]);
 606                 }
 607                 else if (streq(argv[i], "-dup_delay"))
 608                 {
 609                         if ((i + 1) < argc) global.bsd_max_dup_time = atoll(argv[++i]);
 610                 }
 611 #if !TARGET_IPHONE_SIMULATOR
 612                 else if (streq(argv[i], "-klog_in"))
 613                 {
 614                         if ((i + 1) < argc) activate_klog_in = atoi(argv[++i]);
 615                 }
 616                 else if (streq(argv[i], "-bsd_in"))
 617                 {
 618                         if ((i + 1) < argc) activate_bsd_in = atoi(argv[++i]);
 619                 }
 620                 else if (streq(argv[i], "-udp_in"))
 621                 {
 622                         if ((i + 1) < argc) activate_udp_in = atoi(argv[++i]);
 623                 }
 624 #endif
 625                 else if (streq(argv[i], "-launchd_in"))
 626                 {
 627                         if ((i + 1) < argc) global.launchd_enabled = atoi(argv[++i]);
 628                 }
 629 #if !TARGET_IPHONE_SIMULATOR
 630                 else if (streq(argv[i], "-bsd_out"))
 631                 {
 632                         if ((i + 1) < argc) activate_bsd_out = atoi(argv[++i]);
 633                 }
 634                 else if (streq(argv[i], "-remote"))
 635                 {
 636                         if ((i + 1) < argc) remote_enabled = atoi(argv[++i]);
 637                 }
 638 #endif
 639         }
 640
 641         if (global.dbtype == 0)
 642         {
 643                 global.dbtype = DB_TYPE_FILE;
 644                 global.db_file_max = 25600000;
 645         }
 646
 647         signal(SIGHUP, SIG_IGN);
 648
 649         memset(tstr, 0, sizeof(tstr));
 650         now = time(NULL);
 651         ctime_r(&now, tstr);
 652         tstr[19] = '\0';
 653         asldebug("\n%s syslogd PID %d starting\n", tstr, global.pid);
 654
 655         writepid(&first_syslogd_start);
 656
 657         /*
 658          * Log UTMPX boot time record
 659          */
 660         write_boot_log(first_syslogd_start);
 661
 662         /* default NOTIFY_SYSTEM_MASTER settings */
 663         master_val = 0x0;
 664         notify_register_plain(NOTIFY_SYSTEM_MASTER, &master_token);
 665         notify_set_state(master_token, master_val);
 666
 667         asldebug("reading launch plist\n");
 668         launch_config();
 669
 670         asldebug("initializing modules\n");
 671         init_modules();
 672
 673 #if !TARGET_IPHONE_SIMULATOR
 674         asldebug("setting up network change notification handler\n");
 675
 676         /* network change notification resets UDP and BSD modules */
 677         notify_register_dispatch(kNotifySCNetworkChange, &network_change_token, global.work_queue, ^(int x){
 678                 if (activate_udp_in != 0) udp_in_reset();
 679                 if (activate_bsd_out != 0) bsd_out_reset();
 680         });
 681 #endif
 682
 683         asldebug("setting up quota notification handler\n");
 684
 685         notify_key = NULL;
 686         asprintf(&notify_key, "%s%s", NOTIFY_PATH_SERVICE, NOQUOTA_FILE_PATH);
 687         if (notify_key != NULL)
 688         {
 689                 int status;
 690
 691                 status = notify_register_dispatch(notify_key, &quota_file_token, dispatch_get_main_queue(), ^(int t){
 692                         struct stat sb;
 693                         memset(&sb, 0, sizeof(sb));
 694                         if (stat(NOQUOTA_FILE_PATH, &sb) == 0)
 695                         {
 696                                 char *str = NULL;
 697                                 asprintf(&str, "[Sender syslogd] [Level 2] [PID %u] [Facility syslog] [Message *** MESSAGE QUOTAS DISABLED FOR ALL PROCESSES ***]", global.pid);
 698                                 internal_log_message(str);
 699                                 free(str);
 700                         }
 701                         else
 702                         {
 703                                 char *str = NULL;
 704                                 asprintf(&str, "[Sender syslogd] [Level 2] [PID %u] [Facility syslog] [Message *** MESSAGE QUOTAS ENABLED ***]", global.pid);
 705                                 internal_log_message(str);
 706                                 free(str);
 707                         }
 708                 });
 709
 710                 free(notify_key);
 711         }
 712
 713         /* SIGHUP resets all modules */
 714         global.sig_hup_src = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, (uintptr_t)SIGHUP, 0, dispatch_get_main_queue());
 715         dispatch_source_set_event_handler(global.sig_hup_src, ^{
 716                 dispatch_async(global.work_queue, ^{
 717                         int i;
 718
 719                         asldebug("SIGHUP reset\n");
 720                         for (i = 0; i < global.module_count; i++)
 721                         {
 722                                 if (global.module[i]->enabled != 0) global.module[i]->reset();
 723                         }
 724                 });
 725         });
 726
 727         dispatch_resume(global.sig_hup_src);
 728
 729         /* register for DB notification (posted by dbserver) for performance */
 730         notify_register_plain(kNotifyASLDBUpdate, &asl_db_token);
 731
 732         /* timer for MARK facility */
 733         if (global.mark_time > 0)
 734         {
 735                 global.mark_timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_get_main_queue());
 736                 dispatch_source_set_event_handler(global.mark_timer, ^{
 737                         asl_mark();
 738                 });
 739                 dispatch_source_set_timer(global.mark_timer, dispatch_time(DISPATCH_TIME_NOW, global.mark_time * NSEC_PER_SEC), global.mark_time * NSEC_PER_SEC, 0);
 740                 dispatch_resume(global.mark_timer);
 741         }
 742
 743         asldebug("starting mach service\n");
 744         /*
 745          * Start mach server
 746          * Parks a thread in database_server.  In notifyd, we found that the overhead of
 747          * a dispatch source for mach calls was too high, especially on iOS.
 748          */
 749         dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
 750                 database_server();
 751         });
 752
 753         /* go to work */
 754         asldebug("starting work queue\n");
 755         dispatch_resume(global.work_queue);
 756         dispatch_main();
 757
 758         /* NOTREACHED */
 759         return 0;
 760 }