code.delx.au - pulseaudio/blob - src/daemon/main.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as published
   9   by the Free Software Foundation; either version 2.1 of the License,
  10   or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <unistd.h>
  28 #include <errno.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <signal.h>
  33 #include <stddef.h>
  34 #include <ltdl.h>
  35 #include <limits.h>
  36 #include <fcntl.h>
  37 #include <unistd.h>
  38 #include <locale.h>
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41
  42 #include <liboil/liboil.h>
  43
  44 #ifdef HAVE_SYS_MMAN_H
  45 #include <sys/mman.h>
  46 #endif
  47
  48 #ifdef HAVE_SYS_IOCTL_H
  49 #include <sys/ioctl.h>
  50 #endif
  51
  52 #ifdef HAVE_PWD_H
  53 #include <pwd.h>
  54 #endif
  55 #ifdef HAVE_GRP_H
  56 #include <grp.h>
  57 #endif
  58
  59 #ifdef HAVE_LIBWRAP
  60 #include <syslog.h>
  61 #include <tcpd.h>
  62 #endif
  63
  64 #ifdef HAVE_DBUS
  65 #include <dbus/dbus.h>
  66 #endif
  67
  68 #include <pulse/mainloop.h>
  69 #include <pulse/mainloop-signal.h>
  70 #include <pulse/timeval.h>
  71 #include <pulse/xmalloc.h>
  72 #include <pulse/i18n.h>
  73
  74 #include <pulsecore/lock-autospawn.h>
  75 #include <pulsecore/winsock.h>
  76 #include <pulsecore/core-error.h>
  77 #include <pulsecore/core-rtclock.h>
  78 #include <pulsecore/core.h>
  79 #include <pulsecore/memblock.h>
  80 #include <pulsecore/module.h>
  81 #include <pulsecore/cli-command.h>
  82 #include <pulsecore/log.h>
  83 #include <pulsecore/core-util.h>
  84 #include <pulsecore/sioman.h>
  85 #include <pulsecore/cli-text.h>
  86 #include <pulsecore/pid.h>
  87 #include <pulsecore/namereg.h>
  88 #include <pulsecore/random.h>
  89 #include <pulsecore/macro.h>
  90 #include <pulsecore/mutex.h>
  91 #include <pulsecore/thread.h>
  92 #include <pulsecore/once.h>
  93 #include <pulsecore/shm.h>
  94 #include <pulsecore/memtrap.h>
  95 #ifdef HAVE_DBUS
  96 #include <pulsecore/dbus-shared.h>
  97 #endif
  98
  99 #include "cmdline.h"
 100 #include "cpulimit.h"
 101 #include "daemon-conf.h"
 102 #include "dumpmodules.h"
 103 #include "caps.h"
 104 #include "ltdl-bind-now.h"
 105
 106 #ifdef HAVE_LIBWRAP
 107 /* Only one instance of these variables */
 108 int allow_severity = LOG_INFO;
 109 int deny_severity = LOG_WARNING;
 110 #endif
 111
 112 #ifdef HAVE_OSS_WRAPPER
 113 /* padsp looks for this symbol in the running process and disables
 114  * itself if it finds it and it is set to 7 (which is actually a bit
 115  * mask). For details see padsp. */
 116 int __padsp_disabled__ = 7;
 117 #endif
 118
 119 #ifdef OS_IS_WIN32
 120
 121 static void message_cb(pa_mainloop_api*a, pa_time_event*e, const struct timeval *tv, void *userdata) {
 122     MSG msg;
 123     struct timeval tvnext;
 124
 125     while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 126         if (msg.message == WM_QUIT)
 127             raise(SIGTERM);
 128         else {
 129             TranslateMessage(&msg);
 130             DispatchMessage(&msg);
 131         }
 132     }
 133
 134     pa_timeval_add(pa_gettimeofday(&tvnext), 100000);
 135     a->rtclock_time_restart(e, &tvnext);
 136 }
 137
 138 #endif
 139
 140 static void signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 141     pa_log_info(_("Got signal %s."), pa_sig2str(sig));
 142
 143     switch (sig) {
 144 #ifdef SIGUSR1
 145         case SIGUSR1:
 146             pa_module_load(userdata, "module-cli", NULL);
 147             break;
 148 #endif
 149
 150 #ifdef SIGUSR2
 151         case SIGUSR2:
 152             pa_module_load(userdata, "module-cli-protocol-unix", NULL);
 153             break;
 154 #endif
 155
 156 #ifdef SIGHUP
 157         case SIGHUP: {
 158             char *c = pa_full_status_string(userdata);
 159             pa_log_notice("%s", c);
 160             pa_xfree(c);
 161             return;
 162         }
 163 #endif
 164
 165         case SIGINT:
 166         case SIGTERM:
 167         default:
 168             pa_log_info(_("Exiting."));
 169             m->quit(m, 1);
 170             break;
 171     }
 172 }
 173
 174 #if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
 175
 176 static int change_user(void) {
 177     struct passwd *pw;
 178     struct group * gr;
 179     int r;
 180
 181     /* This function is called only in system-wide mode. It creates a
 182      * runtime dir in /var/run/ with proper UID/GID and drops privs
 183      * afterwards. */
 184
 185     if (!(pw = getpwnam(PA_SYSTEM_USER))) {
 186         pa_log(_("Failed to find user '%s'."), PA_SYSTEM_USER);
 187         return -1;
 188     }
 189
 190     if (!(gr = getgrnam(PA_SYSTEM_GROUP))) {
 191         pa_log(_("Failed to find group '%s'."), PA_SYSTEM_GROUP);
 192         return -1;
 193     }
 194
 195     pa_log_info(_("Found user '%s' (UID %lu) and group '%s' (GID %lu)."),
 196                 PA_SYSTEM_USER, (unsigned long) pw->pw_uid,
 197                 PA_SYSTEM_GROUP, (unsigned long) gr->gr_gid);
 198
 199     if (pw->pw_gid != gr->gr_gid) {
 200         pa_log(_("GID of user '%s' and of group '%s' don't match."), PA_SYSTEM_USER, PA_SYSTEM_GROUP);
 201         return -1;
 202     }
 203
 204     if (strcmp(pw->pw_dir, PA_SYSTEM_RUNTIME_PATH) != 0)
 205         pa_log_warn(_("Home directory of user '%s' is not '%s', ignoring."), PA_SYSTEM_USER, PA_SYSTEM_RUNTIME_PATH);
 206
 207     if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH, 0755, pw->pw_uid, gr->gr_gid) < 0) {
 208         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_RUNTIME_PATH, pa_cstrerror(errno));
 209         return -1;
 210     }
 211
 212     if (pa_make_secure_dir(PA_SYSTEM_STATE_PATH, 0700, pw->pw_uid, gr->gr_gid) < 0) {
 213         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_STATE_PATH, pa_cstrerror(errno));
 214         return -1;
 215     }
 216
 217     /* We don't create the config dir here, because we don't need to write to it */
 218
 219     if (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
 220         pa_log(_("Failed to change group list: %s"), pa_cstrerror(errno));
 221         return -1;
 222     }
 223
 224 #if defined(HAVE_SETRESGID)
 225     r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
 226 #elif defined(HAVE_SETEGID)
 227     if ((r = setgid(gr->gr_gid)) >= 0)
 228         r = setegid(gr->gr_gid);
 229 #elif defined(HAVE_SETREGID)
 230     r = setregid(gr->gr_gid, gr->gr_gid);
 231 #else
 232 #error "No API to drop privileges"
 233 #endif
 234
 235     if (r < 0) {
 236         pa_log(_("Failed to change GID: %s"), pa_cstrerror(errno));
 237         return -1;
 238     }
 239
 240 #if defined(HAVE_SETRESUID)
 241     r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
 242 #elif defined(HAVE_SETEUID)
 243     if ((r = setuid(pw->pw_uid)) >= 0)
 244         r = seteuid(pw->pw_uid);
 245 #elif defined(HAVE_SETREUID)
 246     r = setreuid(pw->pw_uid, pw->pw_uid);
 247 #else
 248 #error "No API to drop privileges"
 249 #endif
 250
 251     if (r < 0) {
 252         pa_log(_("Failed to change UID: %s"), pa_cstrerror(errno));
 253         return -1;
 254     }
 255
 256     pa_set_env("USER", PA_SYSTEM_USER);
 257     pa_set_env("USERNAME", PA_SYSTEM_USER);
 258     pa_set_env("LOGNAME", PA_SYSTEM_USER);
 259     pa_set_env("HOME", PA_SYSTEM_RUNTIME_PATH);
 260
 261     /* Relevant for pa_runtime_path() */
 262     pa_set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
 263     pa_set_env("PULSE_CONFIG_PATH", PA_SYSTEM_CONFIG_PATH);
 264     pa_set_env("PULSE_STATE_PATH", PA_SYSTEM_STATE_PATH);
 265
 266     pa_log_info(_("Successfully dropped root privileges."));
 267
 268     return 0;
 269 }
 270
 271 #else /* HAVE_PWD_H && HAVE_GRP_H */
 272
 273 static int change_user(void) {
 274     pa_log(_("System wide mode unsupported on this platform."));
 275     return -1;
 276 }
 277
 278 #endif /* HAVE_PWD_H && HAVE_GRP_H */
 279
 280 #ifdef HAVE_SYS_RESOURCE_H
 281
 282 static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
 283     struct rlimit rl;
 284     pa_assert(r);
 285
 286     if (!r->is_set)
 287         return 0;
 288
 289     rl.rlim_cur = rl.rlim_max = r->value;
 290
 291     if (setrlimit(resource, &rl) < 0) {
 292         pa_log_info(_("setrlimit(%s, (%u, %u)) failed: %s"), name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
 293         return -1;
 294     }
 295
 296     return 0;
 297 }
 298
 299 static void set_all_rlimits(const pa_daemon_conf *conf) {
 300     set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
 301     set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
 302     set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
 303     set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
 304 #ifdef RLIMIT_RSS
 305     set_one_rlimit(&conf->rlimit_rss, RLIMIT_RSS, "RLIMIT_RSS");
 306 #endif
 307 #ifdef RLIMIT_NPROC
 308     set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
 309 #endif
 310 #ifdef RLIMIT_NOFILE
 311     set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
 312 #endif
 313 #ifdef RLIMIT_MEMLOCK
 314     set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
 315 #endif
 316 #ifdef RLIMIT_AS
 317     set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
 318 #endif
 319 #ifdef RLIMIT_LOCKS
 320     set_one_rlimit(&conf->rlimit_locks, RLIMIT_LOCKS, "RLIMIT_LOCKS");
 321 #endif
 322 #ifdef RLIMIT_SIGPENDING
 323     set_one_rlimit(&conf->rlimit_sigpending, RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING");
 324 #endif
 325 #ifdef RLIMIT_MSGQUEUE
 326     set_one_rlimit(&conf->rlimit_msgqueue, RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE");
 327 #endif
 328 #ifdef RLIMIT_NICE
 329     set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
 330 #endif
 331 #ifdef RLIMIT_RTPRIO
 332     set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
 333 #endif
 334 #ifdef RLIMIT_RTTIME
 335     set_one_rlimit(&conf->rlimit_rttime, RLIMIT_RTTIME, "RLIMIT_RTTIME");
 336 #endif
 337 }
 338 #endif
 339
 340 #ifdef HAVE_DBUS
 341 static pa_dbus_connection *register_dbus(pa_core *c) {
 342     DBusError error;
 343     pa_dbus_connection *conn;
 344
 345     dbus_error_init(&error);
 346
 347     if (!(conn = pa_dbus_bus_get(c, pa_in_system_mode() ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, &error)) || dbus_error_is_set(&error)) {
 348         pa_log_warn("Unable to contact D-Bus: %s: %s", error.name, error.message);
 349         goto fail;
 350     }
 351
 352     if (dbus_bus_request_name(pa_dbus_connection_get(conn), "org.pulseaudio.Server", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) == DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
 353         pa_log_debug("Got org.pulseaudio.Server!");
 354         return conn;
 355     }
 356
 357     if (dbus_error_is_set(&error))
 358         pa_log_warn("Failed to acquire org.pulseaudio.Server: %s: %s", error.name, error.message);
 359     else
 360         pa_log_warn("D-Bus name org.pulseaudio.Server already taken. Weird shit!");
 361
 362     /* PA cannot be started twice by the same user and hence we can
 363      * ignore mostly the case that org.pulseaudio.Server is already
 364      * taken. */
 365
 366 fail:
 367
 368     if (conn)
 369         pa_dbus_connection_unref(conn);
 370
 371     dbus_error_free(&error);
 372     return NULL;
 373 }
 374 #endif
 375
 376 int main(int argc, char *argv[]) {
 377     pa_core *c = NULL;
 378     pa_strbuf *buf = NULL;
 379     pa_daemon_conf *conf = NULL;
 380     pa_mainloop *mainloop = NULL;
 381     char *s;
 382     int r = 0, retval = 1, d = 0;
 383     pa_bool_t valid_pid_file = FALSE;
 384     pa_bool_t ltdl_init = FALSE;
 385     int passed_fd = -1;
 386     const char *e;
 387 #ifdef HAVE_FORK
 388     int daemon_pipe[2] = { -1, -1 };
 389 #endif
 390 #ifdef OS_IS_WIN32
 391     pa_time_event *win32_timer;
 392     struct timeval win32_tv;
 393 #endif
 394     int autospawn_fd = -1;
 395     pa_bool_t autospawn_locked = FALSE;
 396 #ifdef HAVE_DBUS
 397     pa_dbus_connection *dbus = NULL;
 398 #endif
 399
 400     pa_log_set_ident("pulseaudio");
 401     pa_log_set_level(PA_LOG_NOTICE);
 402     pa_log_set_flags(PA_LOG_COLORS|PA_LOG_PRINT_FILE|PA_LOG_PRINT_LEVEL, PA_LOG_RESET);
 403
 404 #if defined(__linux__) && defined(__OPTIMIZE__)
 405     /*
 406        Disable lazy relocations to make usage of external libraries
 407        more deterministic for our RT threads. We abuse __OPTIMIZE__ as
 408        a check whether we are a debug build or not. This all is
 409        admittedly a bit snake-oilish.
 410     */
 411
 412     if (!getenv("LD_BIND_NOW")) {
 413         char *rp;
 414
 415         /* We have to execute ourselves, because the libc caches the
 416          * value of $LD_BIND_NOW on initialization. */
 417
 418         pa_set_env("LD_BIND_NOW", "1");
 419
 420         if ((rp = pa_readlink("/proc/self/exe"))) {
 421
 422             if (pa_streq(rp, PA_BINARY))
 423                 pa_assert_se(execv(rp, argv) == 0);
 424             else
 425                 pa_log_warn("/proc/self/exe does not point to " PA_BINARY ", cannot self execute. Are you playing games?");
 426
 427             pa_xfree(rp);
 428
 429         } else
 430             pa_log_warn("Couldn't read /proc/self/exe, cannot self execute. Running in a chroot()?");
 431     }
 432 #endif
 433
 434     if ((e = getenv("PULSE_PASSED_FD"))) {
 435         passed_fd = atoi(e);
 436
 437         if (passed_fd <= 2)
 438             passed_fd = -1;
 439     }
 440
 441     /* We might be autospawned, in which case have no idea in which
 442      * context we have been started. Let's cleanup our execution
 443      * context as good as possible */
 444
 445     pa_reset_personality();
 446     pa_drop_root();
 447     pa_close_all(passed_fd, -1);
 448     pa_reset_sigs(-1);
 449     pa_unblock_sigs(-1);
 450
 451     setlocale(LC_ALL, "");
 452     pa_init_i18n();
 453
 454     conf = pa_daemon_conf_new();
 455
 456     if (pa_daemon_conf_load(conf, NULL) < 0)
 457         goto finish;
 458
 459     if (pa_daemon_conf_env(conf) < 0)
 460         goto finish;
 461
 462     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 463         pa_log(_("Failed to parse command line."));
 464         goto finish;
 465     }
 466
 467     pa_log_set_level(conf->log_level);
 468     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target);
 469     if (conf->log_meta)
 470         pa_log_set_flags(PA_LOG_PRINT_META, PA_LOG_SET);
 471     if (conf->log_time)
 472         pa_log_set_flags(PA_LOG_PRINT_TIME, PA_LOG_SET);
 473     pa_log_set_show_backtrace(conf->log_backtrace);
 474
 475     LTDL_SET_PRELOADED_SYMBOLS();
 476     pa_ltdl_init();
 477     ltdl_init = TRUE;
 478
 479     if (conf->dl_search_path)
 480         lt_dlsetsearchpath(conf->dl_search_path);
 481
 482 #ifdef OS_IS_WIN32
 483     {
 484         WSADATA data;
 485         WSAStartup(MAKEWORD(2, 0), &data);
 486     }
 487 #endif
 488
 489     pa_random_seed();
 490
 491     switch (conf->cmd) {
 492         case PA_CMD_DUMP_MODULES:
 493             pa_dump_modules(conf, argc-d, argv+d);
 494             retval = 0;
 495             goto finish;
 496
 497         case PA_CMD_DUMP_CONF: {
 498             s = pa_daemon_conf_dump(conf);
 499             fputs(s, stdout);
 500             pa_xfree(s);
 501             retval = 0;
 502             goto finish;
 503         }
 504
 505         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 506             int i;
 507
 508             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 509                 if (pa_resample_method_supported(i))
 510                     printf("%s\n", pa_resample_method_to_string(i));
 511
 512             retval = 0;
 513             goto finish;
 514         }
 515
 516         case PA_CMD_HELP :
 517             pa_cmdline_help(argv[0]);
 518             retval = 0;
 519             goto finish;
 520
 521         case PA_CMD_VERSION :
 522             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 523             retval = 0;
 524             goto finish;
 525
 526         case PA_CMD_CHECK: {
 527             pid_t pid;
 528
 529             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 530                 pa_log_info(_("Daemon not running"));
 531             else {
 532                 pa_log_info(_("Daemon running as PID %u"), pid);
 533                 retval = 0;
 534             }
 535
 536             goto finish;
 537
 538         }
 539         case PA_CMD_KILL:
 540
 541             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 542                 pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno));
 543             else
 544                 retval = 0;
 545
 546             goto finish;
 547
 548         case PA_CMD_CLEANUP_SHM:
 549
 550             if (pa_shm_cleanup() >= 0)
 551                 retval = 0;
 552
 553             goto finish;
 554
 555         default:
 556             pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START);
 557     }
 558
 559     if (getuid() == 0 && !conf->system_instance)
 560         pa_log_warn(_("This program is not intended to be run as root (unless --system is specified)."));
 561     else if (getuid() != 0 && conf->system_instance) {
 562         pa_log(_("Root privileges required."));
 563         goto finish;
 564     }
 565
 566     if (conf->cmd == PA_CMD_START && conf->system_instance) {
 567         pa_log(_("--start not supported for system instances."));
 568         goto finish;
 569     }
 570
 571     if (conf->system_instance && !conf->disallow_exit)
 572         pa_log_warn(_("Running in system mode, but --disallow-exit not set!"));
 573
 574     if (conf->system_instance && !conf->disallow_module_loading)
 575         pa_log_warn(_("Running in system mode, but --disallow-module-loading not set!"));
 576
 577     if (conf->system_instance && !conf->disable_shm) {
 578         pa_log_notice(_("Running in system mode, forcibly disabling SHM mode!"));
 579         conf->disable_shm = TRUE;
 580     }
 581
 582     if (conf->system_instance && conf->exit_idle_time >= 0) {
 583         pa_log_notice(_("Running in system mode, forcibly disabling exit idle time!"));
 584         conf->exit_idle_time = -1;
 585     }
 586
 587     if (conf->cmd == PA_CMD_START) {
 588         /* If we shall start PA only when it is not running yet, we
 589          * first take the autospawn lock to make things
 590          * synchronous. */
 591
 592         if ((autospawn_fd = pa_autospawn_lock_init()) < 0) {
 593             pa_log("Failed to initialize autospawn lock");
 594             goto finish;
 595         }
 596
 597         if ((pa_autospawn_lock_acquire(TRUE) < 0)) {
 598             pa_log("Failed to acquire autospawn lock");
 599             goto finish;
 600         }
 601
 602         autospawn_locked = TRUE;
 603     }
 604
 605     if (conf->daemonize) {
 606         pid_t child;
 607         int tty_fd;
 608
 609         if (pa_stdio_acquire() < 0) {
 610             pa_log(_("Failed to acquire stdio."));
 611             goto finish;
 612         }
 613
 614 #ifdef HAVE_FORK
 615         if (pipe(daemon_pipe) < 0) {
 616             pa_log(_("pipe failed: %s"), pa_cstrerror(errno));
 617             goto finish;
 618         }
 619
 620         if ((child = fork()) < 0) {
 621             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 622             goto finish;
 623         }
 624
 625         if (child != 0) {
 626             ssize_t n;
 627             /* Father */
 628
 629             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 630             daemon_pipe[1] = -1;
 631
 632             if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 633
 634                 if (n < 0)
 635                     pa_log(_("read() failed: %s"), pa_cstrerror(errno));
 636
 637                 retval = 1;
 638             }
 639
 640             if (retval)
 641                 pa_log(_("Daemon startup failed."));
 642             else
 643                 pa_log_info(_("Daemon startup successful."));
 644
 645             goto finish;
 646         }
 647
 648         if (autospawn_fd >= 0) {
 649             /* The lock file is unlocked from the parent, so we need
 650              * to close it in the child */
 651
 652             pa_autospawn_lock_release();
 653             pa_autospawn_lock_done(TRUE);
 654
 655             autospawn_locked = FALSE;
 656             autospawn_fd = -1;
 657         }
 658
 659         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 660         daemon_pipe[0] = -1;
 661 #endif
 662
 663         if (conf->auto_log_target)
 664             pa_log_set_target(PA_LOG_SYSLOG);
 665
 666 #ifdef HAVE_SETSID
 667         setsid();
 668 #endif
 669 #ifdef HAVE_SETPGID
 670         setpgid(0,0);
 671 #endif
 672
 673 #ifndef OS_IS_WIN32
 674         pa_close(0);
 675         pa_close(1);
 676         pa_close(2);
 677
 678         pa_assert_se(open("/dev/null", O_RDONLY) == 0);
 679         pa_assert_se(open("/dev/null", O_WRONLY) == 1);
 680         pa_assert_se(open("/dev/null", O_WRONLY) == 2);
 681 #else
 682         FreeConsole();
 683 #endif
 684
 685 #ifdef SIGTTOU
 686         signal(SIGTTOU, SIG_IGN);
 687 #endif
 688 #ifdef SIGTTIN
 689         signal(SIGTTIN, SIG_IGN);
 690 #endif
 691 #ifdef SIGTSTP
 692         signal(SIGTSTP, SIG_IGN);
 693 #endif
 694
 695 #ifdef TIOCNOTTY
 696         if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
 697             ioctl(tty_fd, TIOCNOTTY, (char*) 0);
 698             pa_assert_se(pa_close(tty_fd) == 0);
 699         }
 700 #endif
 701     }
 702
 703     pa_set_env("PULSE_INTERNAL", "1");
 704     pa_assert_se(chdir("/") == 0);
 705     umask(0022);
 706
 707 #ifdef HAVE_SYS_RESOURCE_H
 708     set_all_rlimits(conf);
 709 #endif
 710     pa_rtclock_hrtimer_enable();
 711
 712     pa_raise_priority(conf->nice_level);
 713
 714     if (conf->system_instance)
 715         if (change_user() < 0)
 716             goto finish;
 717
 718     pa_set_env("PULSE_SYSTEM", conf->system_instance ? "1" : "0");
 719
 720     pa_log_info(_("This is PulseAudio %s"), PACKAGE_VERSION);
 721     pa_log_debug(_("Compilation host: %s"), CANONICAL_HOST);
 722     pa_log_debug(_("Compilation CFLAGS: %s"), PA_CFLAGS);
 723
 724     s = pa_uname_string();
 725     pa_log_debug(_("Running on host: %s"), s);
 726     pa_xfree(s);
 727
 728     pa_log_debug(_("Found %u CPUs."), pa_ncpus());
 729
 730     pa_log_info(_("Page size is %lu bytes"), (unsigned long) PA_PAGE_SIZE);
 731
 732 #ifdef HAVE_VALGRIND_MEMCHECK_H
 733     pa_log_debug(_("Compiled with Valgrind support: yes"));
 734 #else
 735     pa_log_debug(_("Compiled with Valgrind support: no"));
 736 #endif
 737
 738     pa_log_debug(_("Running in valgrind mode: %s"), pa_yes_no(pa_in_valgrind()));
 739
 740 #ifdef __OPTIMIZE__
 741     pa_log_debug(_("Optimized build: yes"));
 742 #else
 743     pa_log_debug(_("Optimized build: no"));
 744 #endif
 745
 746 #ifdef NDEBUG
 747     pa_log_debug(_("NDEBUG defined, all asserts disabled."));
 748 #elif defined(FASTPATH)
 749     pa_log_debug(_("FASTPATH defined, only fast path asserts disabled."));
 750 #else
 751     pa_log_debug(_("All asserts enabled."));
 752 #endif
 753
 754     if (!(s = pa_machine_id())) {
 755         pa_log(_("Failed to get machine ID"));
 756         goto finish;
 757     }
 758     pa_log_info(_("Machine ID is %s."), s);
 759     pa_xfree(s);
 760
 761     if ((s = pa_session_id())) {
 762         pa_log_info(_("Session ID is %s."), s);
 763         pa_xfree(s);
 764     }
 765
 766     if (!(s = pa_get_runtime_dir()))
 767         goto finish;
 768     pa_log_info(_("Using runtime directory %s."), s);
 769     pa_xfree(s);
 770
 771     if (!(s = pa_get_state_dir()))
 772         goto finish;
 773     pa_log_info(_("Using state directory %s."), s);
 774     pa_xfree(s);
 775
 776     pa_log_info(_("Running in system mode: %s"), pa_yes_no(pa_in_system_mode()));
 777
 778     if (pa_in_system_mode())
 779         pa_log_warn(_("OK, so you are running PA in system mode. Please note that you most likely shouldn't be doing that.\n"
 780                       "If you do it nonetheless then it's your own fault if things don't work as expected.\n"
 781                       "Please read http://pulseaudio.org/wiki/WhatIsWrongWithSystemMode for an explanation why system mode is usually a bad idea."));
 782
 783     if (conf->use_pid_file) {
 784         int z;
 785
 786         if ((z = pa_pid_file_create("pulseaudio")) != 0) {
 787
 788             if (conf->cmd == PA_CMD_START && z > 0) {
 789                 /* If we are already running and with are run in
 790                  * --start mode, then let's return this as success. */
 791
 792                 retval = 0;
 793                 goto finish;
 794             }
 795
 796             pa_log(_("pa_pid_file_create() failed."));
 797             goto finish;
 798         }
 799
 800         valid_pid_file = TRUE;
 801     }
 802
 803     pa_disable_sigpipe();
 804
 805     if (pa_rtclock_hrtimer())
 806         pa_log_info(_("Fresh high-resolution timers available! Bon appetit!"));
 807     else
 808         pa_log_info(_("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!"));
 809
 810     if (conf->lock_memory) {
 811 #ifdef HAVE_SYS_MMAN_H
 812         if (mlockall(MCL_FUTURE) < 0)
 813             pa_log_warn("mlockall() failed: %s", pa_cstrerror(errno));
 814         else
 815             pa_log_info("Sucessfully locked process into memory.");
 816 #else
 817         pa_log_warn("Memory locking requested but not supported on platform.");
 818 #endif
 819     }
 820
 821     pa_memtrap_install();
 822
 823     pa_assert_se(mainloop = pa_mainloop_new());
 824
 825     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm, conf->shm_size))) {
 826         pa_log(_("pa_core_new() failed."));
 827         goto finish;
 828     }
 829
 830     c->default_sample_spec = conf->default_sample_spec;
 831     c->default_channel_map = conf->default_channel_map;
 832     c->default_n_fragments = conf->default_n_fragments;
 833     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 834     c->exit_idle_time = conf->exit_idle_time;
 835     c->scache_idle_time = conf->scache_idle_time;
 836     c->resample_method = conf->resample_method;
 837     c->realtime_priority = conf->realtime_priority;
 838     c->realtime_scheduling = !!conf->realtime_scheduling;
 839     c->disable_remixing = !!conf->disable_remixing;
 840     c->disable_lfe_remixing = !!conf->disable_lfe_remixing;
 841     c->running_as_daemon = !!conf->daemonize;
 842     c->disallow_exit = conf->disallow_exit;
 843     c->flat_volumes = conf->flat_volumes;
 844
 845     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 846     pa_signal_new(SIGINT, signal_callback, c);
 847     pa_signal_new(SIGTERM, signal_callback, c);
 848 #ifdef SIGUSR1
 849     pa_signal_new(SIGUSR1, signal_callback, c);
 850 #endif
 851 #ifdef SIGUSR2
 852     pa_signal_new(SIGUSR2, signal_callback, c);
 853 #endif
 854 #ifdef SIGHUP
 855     pa_signal_new(SIGHUP, signal_callback, c);
 856 #endif
 857
 858 #ifdef OS_IS_WIN32
 859     win32_timer = pa_mainloop_get_api(mainloop)->rtclock_time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL);
 860 #endif
 861
 862     oil_init();
 863
 864     if (!conf->no_cpu_limit)
 865         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 866
 867     buf = pa_strbuf_new();
 868     if (conf->load_default_script_file) {
 869         FILE *f;
 870
 871         if ((f = pa_daemon_conf_open_default_script_file(conf))) {
 872             r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
 873             fclose(f);
 874         }
 875     }
 876
 877     if (r >= 0)
 878         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 879
 880     pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 881     pa_xfree(s);
 882
 883     /* We completed the initial module loading, so let's disable it
 884      * from now on, if requested */
 885     c->disallow_module_loading = !!conf->disallow_module_loading;
 886
 887     if (r < 0 && conf->fail) {
 888         pa_log(_("Failed to initialize daemon."));
 889         goto finish;
 890     }
 891
 892     if (!c->modules || pa_idxset_size(c->modules) == 0) {
 893         pa_log(_("Daemon startup without any loaded modules, refusing to work."));
 894         goto finish;
 895     }
 896
 897 #ifdef HAVE_FORK
 898     if (daemon_pipe[1] >= 0) {
 899         int ok = 0;
 900         pa_loop_write(daemon_pipe[1], &ok, sizeof(ok), NULL);
 901         pa_close(daemon_pipe[1]);
 902         daemon_pipe[1] = -1;
 903     }
 904 #endif
 905
 906 #ifdef HAVE_DBUS
 907     dbus = register_dbus(c);
 908 #endif
 909
 910     pa_log_info(_("Daemon startup complete."));
 911
 912     retval = 0;
 913     if (pa_mainloop_run(mainloop, &retval) < 0)
 914         goto finish;
 915
 916     pa_log_info(_("Daemon shutdown initiated."));
 917
 918 finish:
 919 #ifdef HAVE_DBUS
 920     if (dbus)
 921         pa_dbus_connection_unref(dbus);
 922 #endif
 923
 924     if (autospawn_fd >= 0) {
 925         if (autospawn_locked)
 926             pa_autospawn_lock_release();
 927
 928         pa_autospawn_lock_done(FALSE);
 929     }
 930
 931 #ifdef OS_IS_WIN32
 932     if (win32_timer)
 933         pa_mainloop_get_api(mainloop)->time_free(win32_timer);
 934 #endif
 935
 936     if (c) {
 937         pa_core_unref(c);
 938         pa_log_info(_("Daemon terminated."));
 939     }
 940
 941     if (!conf->no_cpu_limit)
 942         pa_cpu_limit_done();
 943
 944     pa_signal_done();
 945
 946 #ifdef HAVE_FORK
 947     if (daemon_pipe[1] >= 0)
 948         pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 949
 950     pa_close_pipe(daemon_pipe);
 951 #endif
 952
 953     if (mainloop)
 954         pa_mainloop_free(mainloop);
 955
 956     if (conf)
 957         pa_daemon_conf_free(conf);
 958
 959     if (valid_pid_file)
 960         pa_pid_file_remove();
 961
 962 #ifdef OS_IS_WIN32
 963     WSACleanup();
 964 #endif
 965
 966     if (ltdl_init)
 967         pa_ltdl_done();
 968
 969 #ifdef HAVE_DBUS
 970     dbus_shutdown();
 971 #endif
 972
 973     return retval;
 974 }