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     pa_reset_priority();
 451
 452     setlocale(LC_ALL, "");
 453     pa_init_i18n();
 454
 455     conf = pa_daemon_conf_new();
 456
 457     if (pa_daemon_conf_load(conf, NULL) < 0)
 458         goto finish;
 459
 460     if (pa_daemon_conf_env(conf) < 0)
 461         goto finish;
 462
 463     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 464         pa_log(_("Failed to parse command line."));
 465         goto finish;
 466     }
 467
 468     pa_log_set_level(conf->log_level);
 469     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target);
 470     if (conf->log_meta)
 471         pa_log_set_flags(PA_LOG_PRINT_META, PA_LOG_SET);
 472     if (conf->log_time)
 473         pa_log_set_flags(PA_LOG_PRINT_TIME, PA_LOG_SET);
 474     pa_log_set_show_backtrace(conf->log_backtrace);
 475
 476     LTDL_SET_PRELOADED_SYMBOLS();
 477     pa_ltdl_init();
 478     ltdl_init = TRUE;
 479
 480     if (conf->dl_search_path)
 481         lt_dlsetsearchpath(conf->dl_search_path);
 482
 483 #ifdef OS_IS_WIN32
 484     {
 485         WSADATA data;
 486         WSAStartup(MAKEWORD(2, 0), &data);
 487     }
 488 #endif
 489
 490     pa_random_seed();
 491
 492     switch (conf->cmd) {
 493         case PA_CMD_DUMP_MODULES:
 494             pa_dump_modules(conf, argc-d, argv+d);
 495             retval = 0;
 496             goto finish;
 497
 498         case PA_CMD_DUMP_CONF: {
 499             s = pa_daemon_conf_dump(conf);
 500             fputs(s, stdout);
 501             pa_xfree(s);
 502             retval = 0;
 503             goto finish;
 504         }
 505
 506         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 507             int i;
 508
 509             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 510                 if (pa_resample_method_supported(i))
 511                     printf("%s\n", pa_resample_method_to_string(i));
 512
 513             retval = 0;
 514             goto finish;
 515         }
 516
 517         case PA_CMD_HELP :
 518             pa_cmdline_help(argv[0]);
 519             retval = 0;
 520             goto finish;
 521
 522         case PA_CMD_VERSION :
 523             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 524             retval = 0;
 525             goto finish;
 526
 527         case PA_CMD_CHECK: {
 528             pid_t pid;
 529
 530             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 531                 pa_log_info(_("Daemon not running"));
 532             else {
 533                 pa_log_info(_("Daemon running as PID %u"), pid);
 534                 retval = 0;
 535             }
 536
 537             goto finish;
 538
 539         }
 540         case PA_CMD_KILL:
 541
 542             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 543                 pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno));
 544             else
 545                 retval = 0;
 546
 547             goto finish;
 548
 549         case PA_CMD_CLEANUP_SHM:
 550
 551             if (pa_shm_cleanup() >= 0)
 552                 retval = 0;
 553
 554             goto finish;
 555
 556         default:
 557             pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START);
 558     }
 559
 560     if (getuid() == 0 && !conf->system_instance)
 561         pa_log_warn(_("This program is not intended to be run as root (unless --system is specified)."));
 562     else if (getuid() != 0 && conf->system_instance) {
 563         pa_log(_("Root privileges required."));
 564         goto finish;
 565     }
 566
 567     if (conf->cmd == PA_CMD_START && conf->system_instance) {
 568         pa_log(_("--start not supported for system instances."));
 569         goto finish;
 570     }
 571
 572     if (conf->system_instance && !conf->disallow_exit)
 573         pa_log_warn(_("Running in system mode, but --disallow-exit not set!"));
 574
 575     if (conf->system_instance && !conf->disallow_module_loading)
 576         pa_log_warn(_("Running in system mode, but --disallow-module-loading not set!"));
 577
 578     if (conf->system_instance && !conf->disable_shm) {
 579         pa_log_notice(_("Running in system mode, forcibly disabling SHM mode!"));
 580         conf->disable_shm = TRUE;
 581     }
 582
 583     if (conf->system_instance && conf->exit_idle_time >= 0) {
 584         pa_log_notice(_("Running in system mode, forcibly disabling exit idle time!"));
 585         conf->exit_idle_time = -1;
 586     }
 587
 588     if (conf->cmd == PA_CMD_START) {
 589         /* If we shall start PA only when it is not running yet, we
 590          * first take the autospawn lock to make things
 591          * synchronous. */
 592
 593         if ((autospawn_fd = pa_autospawn_lock_init()) < 0) {
 594             pa_log("Failed to initialize autospawn lock");
 595             goto finish;
 596         }
 597
 598         if ((pa_autospawn_lock_acquire(TRUE) < 0)) {
 599             pa_log("Failed to acquire autospawn lock");
 600             goto finish;
 601         }
 602
 603         autospawn_locked = TRUE;
 604     }
 605
 606     if (conf->daemonize) {
 607         pid_t child;
 608         int tty_fd;
 609
 610         if (pa_stdio_acquire() < 0) {
 611             pa_log(_("Failed to acquire stdio."));
 612             goto finish;
 613         }
 614
 615 #ifdef HAVE_FORK
 616         if (pipe(daemon_pipe) < 0) {
 617             pa_log(_("pipe failed: %s"), pa_cstrerror(errno));
 618             goto finish;
 619         }
 620
 621         if ((child = fork()) < 0) {
 622             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 623             goto finish;
 624         }
 625
 626         if (child != 0) {
 627             ssize_t n;
 628             /* Father */
 629
 630             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 631             daemon_pipe[1] = -1;
 632
 633             if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 634
 635                 if (n < 0)
 636                     pa_log(_("read() failed: %s"), pa_cstrerror(errno));
 637
 638                 retval = 1;
 639             }
 640
 641             if (retval)
 642                 pa_log(_("Daemon startup failed."));
 643             else
 644                 pa_log_info(_("Daemon startup successful."));
 645
 646             goto finish;
 647         }
 648
 649         if (autospawn_fd >= 0) {
 650             /* The lock file is unlocked from the parent, so we need
 651              * to close it in the child */
 652
 653             pa_autospawn_lock_release();
 654             pa_autospawn_lock_done(TRUE);
 655
 656             autospawn_locked = FALSE;
 657             autospawn_fd = -1;
 658         }
 659
 660         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 661         daemon_pipe[0] = -1;
 662 #endif
 663
 664         if (conf->auto_log_target)
 665             pa_log_set_target(PA_LOG_SYSLOG);
 666
 667 #ifdef HAVE_SETSID
 668         setsid();
 669 #endif
 670 #ifdef HAVE_SETPGID
 671         setpgid(0,0);
 672 #endif
 673
 674 #ifndef OS_IS_WIN32
 675         pa_close(0);
 676         pa_close(1);
 677         pa_close(2);
 678
 679         pa_assert_se(open("/dev/null", O_RDONLY) == 0);
 680         pa_assert_se(open("/dev/null", O_WRONLY) == 1);
 681         pa_assert_se(open("/dev/null", O_WRONLY) == 2);
 682 #else
 683         FreeConsole();
 684 #endif
 685
 686 #ifdef SIGTTOU
 687         signal(SIGTTOU, SIG_IGN);
 688 #endif
 689 #ifdef SIGTTIN
 690         signal(SIGTTIN, SIG_IGN);
 691 #endif
 692 #ifdef SIGTSTP
 693         signal(SIGTSTP, SIG_IGN);
 694 #endif
 695
 696 #ifdef TIOCNOTTY
 697         if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
 698             ioctl(tty_fd, TIOCNOTTY, (char*) 0);
 699             pa_assert_se(pa_close(tty_fd) == 0);
 700         }
 701 #endif
 702     }
 703
 704     pa_set_env("PULSE_INTERNAL", "1");
 705     pa_assert_se(chdir("/") == 0);
 706     umask(0022);
 707
 708 #ifdef HAVE_SYS_RESOURCE_H
 709     set_all_rlimits(conf);
 710 #endif
 711     pa_rtclock_hrtimer_enable();
 712
 713     pa_raise_priority(conf->nice_level);
 714
 715     if (conf->system_instance)
 716         if (change_user() < 0)
 717             goto finish;
 718
 719     pa_set_env("PULSE_SYSTEM", conf->system_instance ? "1" : "0");
 720
 721     pa_log_info(_("This is PulseAudio %s"), PACKAGE_VERSION);
 722     pa_log_debug(_("Compilation host: %s"), CANONICAL_HOST);
 723     pa_log_debug(_("Compilation CFLAGS: %s"), PA_CFLAGS);
 724
 725     s = pa_uname_string();
 726     pa_log_debug(_("Running on host: %s"), s);
 727     pa_xfree(s);
 728
 729     pa_log_debug(_("Found %u CPUs."), pa_ncpus());
 730
 731     pa_log_info(_("Page size is %lu bytes"), (unsigned long) PA_PAGE_SIZE);
 732
 733 #ifdef HAVE_VALGRIND_MEMCHECK_H
 734     pa_log_debug(_("Compiled with Valgrind support: yes"));
 735 #else
 736     pa_log_debug(_("Compiled with Valgrind support: no"));
 737 #endif
 738
 739     pa_log_debug(_("Running in valgrind mode: %s"), pa_yes_no(pa_in_valgrind()));
 740
 741 #ifdef __OPTIMIZE__
 742     pa_log_debug(_("Optimized build: yes"));
 743 #else
 744     pa_log_debug(_("Optimized build: no"));
 745 #endif
 746
 747 #ifdef NDEBUG
 748     pa_log_debug(_("NDEBUG defined, all asserts disabled."));
 749 #elif defined(FASTPATH)
 750     pa_log_debug(_("FASTPATH defined, only fast path asserts disabled."));
 751 #else
 752     pa_log_debug(_("All asserts enabled."));
 753 #endif
 754
 755     if (!(s = pa_machine_id())) {
 756         pa_log(_("Failed to get machine ID"));
 757         goto finish;
 758     }
 759     pa_log_info(_("Machine ID is %s."), s);
 760     pa_xfree(s);
 761
 762     if ((s = pa_session_id())) {
 763         pa_log_info(_("Session ID is %s."), s);
 764         pa_xfree(s);
 765     }
 766
 767     if (!(s = pa_get_runtime_dir()))
 768         goto finish;
 769     pa_log_info(_("Using runtime directory %s."), s);
 770     pa_xfree(s);
 771
 772     if (!(s = pa_get_state_dir()))
 773         goto finish;
 774     pa_log_info(_("Using state directory %s."), s);
 775     pa_xfree(s);
 776
 777     pa_log_info(_("Using modules directory %s."), conf->dl_search_path);
 778
 779     pa_log_info(_("Running in system mode: %s"), pa_yes_no(pa_in_system_mode()));
 780
 781     if (pa_in_system_mode())
 782         pa_log_warn(_("OK, so you are running PA in system mode. Please note that you most likely shouldn't be doing that.\n"
 783                       "If you do it nonetheless then it's your own fault if things don't work as expected.\n"
 784                       "Please read http://pulseaudio.org/wiki/WhatIsWrongWithSystemMode for an explanation why system mode is usually a bad idea."));
 785
 786     if (conf->use_pid_file) {
 787         int z;
 788
 789         if ((z = pa_pid_file_create("pulseaudio")) != 0) {
 790
 791             if (conf->cmd == PA_CMD_START && z > 0) {
 792                 /* If we are already running and with are run in
 793                  * --start mode, then let's return this as success. */
 794
 795                 retval = 0;
 796                 goto finish;
 797             }
 798
 799             pa_log(_("pa_pid_file_create() failed."));
 800             goto finish;
 801         }
 802
 803         valid_pid_file = TRUE;
 804     }
 805
 806     pa_disable_sigpipe();
 807
 808     if (pa_rtclock_hrtimer())
 809         pa_log_info(_("Fresh high-resolution timers available! Bon appetit!"));
 810     else
 811         pa_log_info(_("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!"));
 812
 813     if (conf->lock_memory) {
 814 #ifdef HAVE_SYS_MMAN_H
 815         if (mlockall(MCL_FUTURE) < 0)
 816             pa_log_warn("mlockall() failed: %s", pa_cstrerror(errno));
 817         else
 818             pa_log_info("Sucessfully locked process into memory.");
 819 #else
 820         pa_log_warn("Memory locking requested but not supported on platform.");
 821 #endif
 822     }
 823
 824     pa_memtrap_install();
 825
 826     pa_assert_se(mainloop = pa_mainloop_new());
 827
 828     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm, conf->shm_size))) {
 829         pa_log(_("pa_core_new() failed."));
 830         goto finish;
 831     }
 832
 833     c->default_sample_spec = conf->default_sample_spec;
 834     c->default_channel_map = conf->default_channel_map;
 835     c->default_n_fragments = conf->default_n_fragments;
 836     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 837     c->exit_idle_time = conf->exit_idle_time;
 838     c->scache_idle_time = conf->scache_idle_time;
 839     c->resample_method = conf->resample_method;
 840     c->realtime_priority = conf->realtime_priority;
 841     c->realtime_scheduling = !!conf->realtime_scheduling;
 842     c->disable_remixing = !!conf->disable_remixing;
 843     c->disable_lfe_remixing = !!conf->disable_lfe_remixing;
 844     c->running_as_daemon = !!conf->daemonize;
 845     c->disallow_exit = conf->disallow_exit;
 846     c->flat_volumes = conf->flat_volumes;
 847
 848     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 849     pa_signal_new(SIGINT, signal_callback, c);
 850     pa_signal_new(SIGTERM, signal_callback, c);
 851 #ifdef SIGUSR1
 852     pa_signal_new(SIGUSR1, signal_callback, c);
 853 #endif
 854 #ifdef SIGUSR2
 855     pa_signal_new(SIGUSR2, signal_callback, c);
 856 #endif
 857 #ifdef SIGHUP
 858     pa_signal_new(SIGHUP, signal_callback, c);
 859 #endif
 860
 861 #ifdef OS_IS_WIN32
 862     win32_timer = pa_mainloop_get_api(mainloop)->rtclock_time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL);
 863 #endif
 864
 865     oil_init();
 866
 867     if (!conf->no_cpu_limit)
 868         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 869
 870     buf = pa_strbuf_new();
 871     if (conf->load_default_script_file) {
 872         FILE *f;
 873
 874         if ((f = pa_daemon_conf_open_default_script_file(conf))) {
 875             r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
 876             fclose(f);
 877         }
 878     }
 879
 880     if (r >= 0)
 881         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 882
 883     pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 884     pa_xfree(s);
 885
 886     /* We completed the initial module loading, so let's disable it
 887      * from now on, if requested */
 888     c->disallow_module_loading = !!conf->disallow_module_loading;
 889
 890     if (r < 0 && conf->fail) {
 891         pa_log(_("Failed to initialize daemon."));
 892         goto finish;
 893     }
 894
 895     if (!c->modules || pa_idxset_size(c->modules) == 0) {
 896         pa_log(_("Daemon startup without any loaded modules, refusing to work."));
 897         goto finish;
 898     }
 899
 900 #ifdef HAVE_FORK
 901     if (daemon_pipe[1] >= 0) {
 902         int ok = 0;
 903         pa_loop_write(daemon_pipe[1], &ok, sizeof(ok), NULL);
 904         pa_close(daemon_pipe[1]);
 905         daemon_pipe[1] = -1;
 906     }
 907 #endif
 908
 909 #ifdef HAVE_DBUS
 910     dbus = register_dbus(c);
 911 #endif
 912
 913     pa_log_info(_("Daemon startup complete."));
 914
 915     retval = 0;
 916     if (pa_mainloop_run(mainloop, &retval) < 0)
 917         goto finish;
 918
 919     pa_log_info(_("Daemon shutdown initiated."));
 920
 921 finish:
 922 #ifdef HAVE_DBUS
 923     if (dbus)
 924         pa_dbus_connection_unref(dbus);
 925 #endif
 926
 927     if (autospawn_fd >= 0) {
 928         if (autospawn_locked)
 929             pa_autospawn_lock_release();
 930
 931         pa_autospawn_lock_done(FALSE);
 932     }
 933
 934 #ifdef OS_IS_WIN32
 935     if (win32_timer)
 936         pa_mainloop_get_api(mainloop)->time_free(win32_timer);
 937 #endif
 938
 939     if (c) {
 940         pa_core_unref(c);
 941         pa_log_info(_("Daemon terminated."));
 942     }
 943
 944     if (!conf->no_cpu_limit)
 945         pa_cpu_limit_done();
 946
 947     pa_signal_done();
 948
 949 #ifdef HAVE_FORK
 950     if (daemon_pipe[1] >= 0)
 951         pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 952
 953     pa_close_pipe(daemon_pipe);
 954 #endif
 955
 956     if (mainloop)
 957         pa_mainloop_free(mainloop);
 958
 959     if (conf)
 960         pa_daemon_conf_free(conf);
 961
 962     if (valid_pid_file)
 963         pa_pid_file_remove();
 964
 965 #ifdef OS_IS_WIN32
 966     WSACleanup();
 967 #endif
 968
 969     if (ltdl_init)
 970         pa_ltdl_done();
 971
 972 #ifdef HAVE_DBUS
 973     dbus_shutdown();
 974 #endif
 975
 976     return retval;
 977 }