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
 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     pa_drop_root();
 445     pa_close_all(passed_fd, -1);
 446     pa_reset_sigs(-1);
 447     pa_unblock_sigs(-1);
 448
 449     setlocale(LC_ALL, "");
 450     pa_init_i18n();
 451
 452     conf = pa_daemon_conf_new();
 453
 454     if (pa_daemon_conf_load(conf, NULL) < 0)
 455         goto finish;
 456
 457     if (pa_daemon_conf_env(conf) < 0)
 458         goto finish;
 459
 460     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 461         pa_log(_("Failed to parse command line."));
 462         goto finish;
 463     }
 464
 465     pa_log_set_level(conf->log_level);
 466     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target);
 467     if (conf->log_meta)
 468         pa_log_set_flags(PA_LOG_PRINT_META, PA_LOG_SET);
 469     if (conf->log_time)
 470         pa_log_set_flags(PA_LOG_PRINT_TIME, PA_LOG_SET);
 471     pa_log_set_show_backtrace(conf->log_backtrace);
 472
 473     LTDL_SET_PRELOADED_SYMBOLS();
 474     pa_ltdl_init();
 475     ltdl_init = TRUE;
 476
 477     if (conf->dl_search_path)
 478         lt_dlsetsearchpath(conf->dl_search_path);
 479
 480 #ifdef OS_IS_WIN32
 481     {
 482         WSADATA data;
 483         WSAStartup(MAKEWORD(2, 0), &data);
 484     }
 485 #endif
 486
 487     pa_random_seed();
 488
 489     switch (conf->cmd) {
 490         case PA_CMD_DUMP_MODULES:
 491             pa_dump_modules(conf, argc-d, argv+d);
 492             retval = 0;
 493             goto finish;
 494
 495         case PA_CMD_DUMP_CONF: {
 496             s = pa_daemon_conf_dump(conf);
 497             fputs(s, stdout);
 498             pa_xfree(s);
 499             retval = 0;
 500             goto finish;
 501         }
 502
 503         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 504             int i;
 505
 506             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 507                 if (pa_resample_method_supported(i))
 508                     printf("%s\n", pa_resample_method_to_string(i));
 509
 510             retval = 0;
 511             goto finish;
 512         }
 513
 514         case PA_CMD_HELP :
 515             pa_cmdline_help(argv[0]);
 516             retval = 0;
 517             goto finish;
 518
 519         case PA_CMD_VERSION :
 520             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 521             retval = 0;
 522             goto finish;
 523
 524         case PA_CMD_CHECK: {
 525             pid_t pid;
 526
 527             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 528                 pa_log_info(_("Daemon not running"));
 529             else {
 530                 pa_log_info(_("Daemon running as PID %u"), pid);
 531                 retval = 0;
 532             }
 533
 534             goto finish;
 535
 536         }
 537         case PA_CMD_KILL:
 538
 539             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 540                 pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno));
 541             else
 542                 retval = 0;
 543
 544             goto finish;
 545
 546         case PA_CMD_CLEANUP_SHM:
 547
 548             if (pa_shm_cleanup() >= 0)
 549                 retval = 0;
 550
 551             goto finish;
 552
 553         default:
 554             pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START);
 555     }
 556
 557     if (getuid() == 0 && !conf->system_instance)
 558         pa_log_warn(_("This program is not intended to be run as root (unless --system is specified)."));
 559     else if (getuid() != 0 && conf->system_instance) {
 560         pa_log(_("Root privileges required."));
 561         goto finish;
 562     }
 563
 564     if (conf->cmd == PA_CMD_START && conf->system_instance) {
 565         pa_log(_("--start not supported for system instances."));
 566         goto finish;
 567     }
 568
 569     if (conf->system_instance && !conf->disallow_exit)
 570         pa_log_warn(_("Running in system mode, but --disallow-exit not set!"));
 571
 572     if (conf->system_instance && !conf->disallow_module_loading)
 573         pa_log_warn(_("Running in system mode, but --disallow-module-loading not set!"));
 574
 575     if (conf->system_instance && !conf->disable_shm) {
 576         pa_log_notice(_("Running in system mode, forcibly disabling SHM mode!"));
 577         conf->disable_shm = TRUE;
 578     }
 579
 580     if (conf->system_instance && conf->exit_idle_time >= 0) {
 581         pa_log_notice(_("Running in system mode, forcibly disabling exit idle time!"));
 582         conf->exit_idle_time = -1;
 583     }
 584
 585     if (conf->cmd == PA_CMD_START) {
 586         /* If we shall start PA only when it is not running yet, we
 587          * first take the autospawn lock to make things
 588          * synchronous. */
 589
 590         if ((autospawn_fd = pa_autospawn_lock_init()) < 0) {
 591             pa_log("Failed to initialize autospawn lock");
 592             goto finish;
 593         }
 594
 595         if ((pa_autospawn_lock_acquire(TRUE) < 0)) {
 596             pa_log("Failed to acquire autospawn lock");
 597             goto finish;
 598         }
 599
 600         autospawn_locked = TRUE;
 601     }
 602
 603     if (conf->daemonize) {
 604         pid_t child;
 605         int tty_fd;
 606
 607         if (pa_stdio_acquire() < 0) {
 608             pa_log(_("Failed to acquire stdio."));
 609             goto finish;
 610         }
 611
 612 #ifdef HAVE_FORK
 613         if (pipe(daemon_pipe) < 0) {
 614             pa_log(_("pipe failed: %s"), pa_cstrerror(errno));
 615             goto finish;
 616         }
 617
 618         if ((child = fork()) < 0) {
 619             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 620             goto finish;
 621         }
 622
 623         if (child != 0) {
 624             ssize_t n;
 625             /* Father */
 626
 627             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 628             daemon_pipe[1] = -1;
 629
 630             if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 631
 632                 if (n < 0)
 633                     pa_log(_("read() failed: %s"), pa_cstrerror(errno));
 634
 635                 retval = 1;
 636             }
 637
 638             if (retval)
 639                 pa_log(_("Daemon startup failed."));
 640             else
 641                 pa_log_info(_("Daemon startup successful."));
 642
 643             goto finish;
 644         }
 645
 646         if (autospawn_fd >= 0) {
 647             /* The lock file is unlocked from the parent, so we need
 648              * to close it in the child */
 649
 650             pa_autospawn_lock_release();
 651             pa_autospawn_lock_done(TRUE);
 652
 653             autospawn_locked = FALSE;
 654             autospawn_fd = -1;
 655         }
 656
 657         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 658         daemon_pipe[0] = -1;
 659 #endif
 660
 661         if (conf->auto_log_target)
 662             pa_log_set_target(PA_LOG_SYSLOG);
 663
 664 #ifdef HAVE_SETSID
 665         setsid();
 666 #endif
 667 #ifdef HAVE_SETPGID
 668         setpgid(0,0);
 669 #endif
 670
 671 #ifndef OS_IS_WIN32
 672         pa_close(0);
 673         pa_close(1);
 674         pa_close(2);
 675
 676         pa_assert_se(open("/dev/null", O_RDONLY) == 0);
 677         pa_assert_se(open("/dev/null", O_WRONLY) == 1);
 678         pa_assert_se(open("/dev/null", O_WRONLY) == 2);
 679 #else
 680         FreeConsole();
 681 #endif
 682
 683 #ifdef SIGTTOU
 684         signal(SIGTTOU, SIG_IGN);
 685 #endif
 686 #ifdef SIGTTIN
 687         signal(SIGTTIN, SIG_IGN);
 688 #endif
 689 #ifdef SIGTSTP
 690         signal(SIGTSTP, SIG_IGN);
 691 #endif
 692
 693 #ifdef TIOCNOTTY
 694         if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
 695             ioctl(tty_fd, TIOCNOTTY, (char*) 0);
 696             pa_assert_se(pa_close(tty_fd) == 0);
 697         }
 698 #endif
 699     }
 700
 701     pa_set_env("PULSE_INTERNAL", "1");
 702     pa_assert_se(chdir("/") == 0);
 703     umask(0022);
 704
 705 #ifdef HAVE_SYS_RESOURCE_H
 706     set_all_rlimits(conf);
 707 #endif
 708     pa_rtclock_hrtimer_enable();
 709
 710     pa_raise_priority(conf->nice_level);
 711
 712     if (conf->system_instance)
 713         if (change_user() < 0)
 714             goto finish;
 715
 716     pa_set_env("PULSE_SYSTEM", conf->system_instance ? "1" : "0");
 717
 718     pa_log_info(_("This is PulseAudio %s"), PACKAGE_VERSION);
 719     pa_log_debug(_("Compilation host: %s"), CANONICAL_HOST);
 720     pa_log_debug(_("Compilation CFLAGS: %s"), PA_CFLAGS);
 721
 722     s = pa_uname_string();
 723     pa_log_debug(_("Running on host: %s"), s);
 724     pa_xfree(s);
 725
 726     pa_log_debug(_("Found %u CPUs."), pa_ncpus());
 727
 728     pa_log_info(_("Page size is %lu bytes"), (unsigned long) PA_PAGE_SIZE);
 729
 730 #ifdef HAVE_VALGRIND_MEMCHECK_H
 731     pa_log_debug(_("Compiled with Valgrind support: yes"));
 732 #else
 733     pa_log_debug(_("Compiled with Valgrind support: no"));
 734 #endif
 735
 736     pa_log_debug(_("Running in valgrind mode: %s"), pa_yes_no(pa_in_valgrind()));
 737
 738 #ifdef __OPTIMIZE__
 739     pa_log_debug(_("Optimized build: yes"));
 740 #else
 741     pa_log_debug(_("Optimized build: no"));
 742 #endif
 743
 744 #ifdef NDEBUG
 745     pa_log_debug(_("NDEBUG defined, all asserts disabled."));
 746 #elif defined(FASTPATH)
 747     pa_log_debug(_("FASTPATH defined, only fast path asserts disabled."));
 748 #else
 749     pa_log_debug(_("All asserts enabled."));
 750 #endif
 751
 752     if (!(s = pa_machine_id())) {
 753         pa_log(_("Failed to get machine ID"));
 754         goto finish;
 755     }
 756     pa_log_info(_("Machine ID is %s."), s);
 757     pa_xfree(s);
 758
 759     if ((s = pa_session_id())) {
 760         pa_log_info(_("Session ID is %s."), s);
 761         pa_xfree(s);
 762     }
 763
 764     if (!(s = pa_get_runtime_dir()))
 765         goto finish;
 766     pa_log_info(_("Using runtime directory %s."), s);
 767     pa_xfree(s);
 768
 769     if (!(s = pa_get_state_dir()))
 770         goto finish;
 771     pa_log_info(_("Using state directory %s."), s);
 772     pa_xfree(s);
 773
 774     pa_log_info(_("Running in system mode: %s"), pa_yes_no(pa_in_system_mode()));
 775
 776     if (pa_in_system_mode())
 777         pa_log_warn(_("OK, so you are running PA in system mode. Please note that you most likely shouldn't be doing that.\n"
 778                       "If you do it nonetheless then it's your own fault if things don't work as expected.\n"
 779                       "Please read http://pulseaudio.org/wiki/WhatIsWrongWithSystemMode for an explanation why system mode is usually a bad idea."));
 780
 781     if (conf->use_pid_file) {
 782         int z;
 783
 784         if ((z = pa_pid_file_create("pulseaudio")) != 0) {
 785
 786             if (conf->cmd == PA_CMD_START && z > 0) {
 787                 /* If we are already running and with are run in
 788                  * --start mode, then let's return this as success. */
 789
 790                 retval = 0;
 791                 goto finish;
 792             }
 793
 794             pa_log(_("pa_pid_file_create() failed."));
 795             goto finish;
 796         }
 797
 798         valid_pid_file = TRUE;
 799     }
 800
 801     pa_disable_sigpipe();
 802
 803     if (pa_rtclock_hrtimer())
 804         pa_log_info(_("Fresh high-resolution timers available! Bon appetit!"));
 805     else
 806         pa_log_info(_("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!"));
 807
 808     if (conf->lock_memory) {
 809 #ifdef HAVE_SYS_MMAN_H
 810         if (mlockall(MCL_FUTURE) < 0)
 811             pa_log_warn("mlockall() failed: %s", pa_cstrerror(errno));
 812         else
 813             pa_log_info("Sucessfully locked process into memory.");
 814 #else
 815         pa_log_warn("Memory locking requested but not supported on platform.");
 816 #endif
 817     }
 818
 819     pa_memtrap_install();
 820
 821     pa_assert_se(mainloop = pa_mainloop_new());
 822
 823     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm, conf->shm_size))) {
 824         pa_log(_("pa_core_new() failed."));
 825         goto finish;
 826     }
 827
 828     c->default_sample_spec = conf->default_sample_spec;
 829     c->default_channel_map = conf->default_channel_map;
 830     c->default_n_fragments = conf->default_n_fragments;
 831     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 832     c->exit_idle_time = conf->exit_idle_time;
 833     c->scache_idle_time = conf->scache_idle_time;
 834     c->resample_method = conf->resample_method;
 835     c->realtime_priority = conf->realtime_priority;
 836     c->realtime_scheduling = !!conf->realtime_scheduling;
 837     c->disable_remixing = !!conf->disable_remixing;
 838     c->disable_lfe_remixing = !!conf->disable_lfe_remixing;
 839     c->running_as_daemon = !!conf->daemonize;
 840     c->disallow_exit = conf->disallow_exit;
 841     c->flat_volumes = conf->flat_volumes;
 842
 843     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 844     pa_signal_new(SIGINT, signal_callback, c);
 845     pa_signal_new(SIGTERM, signal_callback, c);
 846 #ifdef SIGUSR1
 847     pa_signal_new(SIGUSR1, signal_callback, c);
 848 #endif
 849 #ifdef SIGUSR2
 850     pa_signal_new(SIGUSR2, signal_callback, c);
 851 #endif
 852 #ifdef SIGHUP
 853     pa_signal_new(SIGHUP, signal_callback, c);
 854 #endif
 855
 856 #ifdef OS_IS_WIN32
 857     win32_timer = pa_mainloop_get_api(mainloop)->rtclock_time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL);
 858 #endif
 859
 860     oil_init();
 861
 862     if (!conf->no_cpu_limit)
 863         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 864
 865     buf = pa_strbuf_new();
 866     if (conf->load_default_script_file) {
 867         FILE *f;
 868
 869         if ((f = pa_daemon_conf_open_default_script_file(conf))) {
 870             r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
 871             fclose(f);
 872         }
 873     }
 874
 875     if (r >= 0)
 876         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 877
 878     pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 879     pa_xfree(s);
 880
 881     /* We completed the initial module loading, so let's disable it
 882      * from now on, if requested */
 883     c->disallow_module_loading = !!conf->disallow_module_loading;
 884
 885     if (r < 0 && conf->fail) {
 886         pa_log(_("Failed to initialize daemon."));
 887         goto finish;
 888     }
 889
 890     if (!c->modules || pa_idxset_size(c->modules) == 0) {
 891         pa_log(_("Daemon startup without any loaded modules, refusing to work."));
 892         goto finish;
 893     }
 894
 895 #ifdef HAVE_FORK
 896     if (daemon_pipe[1] >= 0) {
 897         int ok = 0;
 898         pa_loop_write(daemon_pipe[1], &ok, sizeof(ok), NULL);
 899         pa_close(daemon_pipe[1]);
 900         daemon_pipe[1] = -1;
 901     }
 902 #endif
 903
 904 #ifdef HAVE_DBUS
 905     dbus = register_dbus(c);
 906 #endif
 907
 908     pa_log_info(_("Daemon startup complete."));
 909
 910     retval = 0;
 911     if (pa_mainloop_run(mainloop, &retval) < 0)
 912         goto finish;
 913
 914     pa_log_info(_("Daemon shutdown initiated."));
 915
 916 finish:
 917 #ifdef HAVE_DBUS
 918     if (dbus)
 919         pa_dbus_connection_unref(dbus);
 920 #endif
 921
 922     if (autospawn_fd >= 0) {
 923         if (autospawn_locked)
 924             pa_autospawn_lock_release();
 925
 926         pa_autospawn_lock_done(FALSE);
 927     }
 928
 929 #ifdef OS_IS_WIN32
 930     if (win32_timer)
 931         pa_mainloop_get_api(mainloop)->time_free(win32_timer);
 932 #endif
 933
 934     if (c) {
 935         pa_core_unref(c);
 936         pa_log_info(_("Daemon terminated."));
 937     }
 938
 939     if (!conf->no_cpu_limit)
 940         pa_cpu_limit_done();
 941
 942     pa_signal_done();
 943
 944 #ifdef HAVE_FORK
 945     if (daemon_pipe[1] >= 0)
 946         pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 947
 948     pa_close_pipe(daemon_pipe);
 949 #endif
 950
 951     if (mainloop)
 952         pa_mainloop_free(mainloop);
 953
 954     if (conf)
 955         pa_daemon_conf_free(conf);
 956
 957     if (valid_pid_file)
 958         pa_pid_file_remove();
 959
 960 #ifdef OS_IS_WIN32
 961     WSACleanup();
 962 #endif
 963
 964     if (ltdl_init)
 965         pa_ltdl_done();
 966
 967 #ifdef HAVE_DBUS
 968     dbus_shutdown();
 969 #endif
 970
 971     return retval;
 972 }