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 <unistd.h>
  37 #include <locale.h>
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40
  41 #ifdef HAVE_SYS_MMAN_H
  42 #include <sys/mman.h>
  43 #endif
  44
  45 #ifdef HAVE_PWD_H
  46 #include <pwd.h>
  47 #endif
  48 #ifdef HAVE_GRP_H
  49 #include <grp.h>
  50 #endif
  51
  52 #ifdef HAVE_LIBWRAP
  53 #include <syslog.h>
  54 #include <tcpd.h>
  55 #endif
  56
  57 #ifdef HAVE_DBUS
  58 #include <dbus/dbus.h>
  59 #endif
  60
  61 #include <pulse/client-conf.h>
  62 #ifdef HAVE_X11
  63 #include <pulse/client-conf-x11.h>
  64 #endif
  65 #include <pulse/mainloop.h>
  66 #include <pulse/mainloop-signal.h>
  67 #include <pulse/timeval.h>
  68 #include <pulse/xmalloc.h>
  69
  70 #include <pulsecore/i18n.h>
  71 #include <pulsecore/lock-autospawn.h>
  72 #include <pulsecore/socket.h>
  73 #include <pulsecore/core-error.h>
  74 #include <pulsecore/core-rtclock.h>
  75 #include <pulsecore/core-scache.h>
  76 #include <pulsecore/core.h>
  77 #include <pulsecore/module.h>
  78 #include <pulsecore/cli-command.h>
  79 #include <pulsecore/log.h>
  80 #include <pulsecore/core-util.h>
  81 #include <pulsecore/sioman.h>
  82 #include <pulsecore/cli-text.h>
  83 #include <pulsecore/pid.h>
  84 #include <pulsecore/random.h>
  85 #include <pulsecore/macro.h>
  86 #include <pulsecore/shm.h>
  87 #include <pulsecore/memtrap.h>
  88 #include <pulsecore/strlist.h>
  89 #ifdef HAVE_DBUS
  90 #include <pulsecore/dbus-shared.h>
  91 #endif
  92 #include <pulsecore/cpu-arm.h>
  93 #include <pulsecore/cpu-x86.h>
  94 #include <pulsecore/cpu-orc.h>
  95
  96 #include "cmdline.h"
  97 #include "cpulimit.h"
  98 #include "daemon-conf.h"
  99 #include "dumpmodules.h"
 100 #include "caps.h"
 101 #include "ltdl-bind-now.h"
 102 #include "server-lookup.h"
 103
 104 #ifdef HAVE_LIBWRAP
 105 /* Only one instance of these variables */
 106 int allow_severity = LOG_INFO;
 107 int deny_severity = LOG_WARNING;
 108 #endif
 109
 110 #ifdef HAVE_OSS_WRAPPER
 111 /* padsp looks for this symbol in the running process and disables
 112  * itself if it finds it and it is set to 7 (which is actually a bit
 113  * mask). For details see padsp. */
 114 int __padsp_disabled__ = 7;
 115 #endif
 116
 117 #ifdef OS_IS_WIN32
 118
 119 static void message_cb(pa_mainloop_api*a, pa_time_event*e, const struct timeval *tv, void *userdata) {
 120     MSG msg;
 121     struct timeval tvnext;
 122
 123     while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 124         if (msg.message == WM_QUIT)
 125             raise(SIGTERM);
 126         else {
 127             TranslateMessage(&msg);
 128             DispatchMessage(&msg);
 129         }
 130     }
 131
 132     pa_timeval_add(pa_gettimeofday(&tvnext), 100000);
 133     a->time_restart(e, &tvnext);
 134 }
 135
 136 #endif
 137
 138 static void signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 139     pa_log_info(_("Got signal %s."), pa_sig2str(sig));
 140
 141     switch (sig) {
 142 #ifdef SIGUSR1
 143         case SIGUSR1:
 144             pa_module_load(userdata, "module-cli", NULL);
 145             break;
 146 #endif
 147
 148 #ifdef SIGUSR2
 149         case SIGUSR2:
 150             pa_module_load(userdata, "module-cli-protocol-unix", NULL);
 151             break;
 152 #endif
 153
 154 #ifdef SIGHUP
 155         case SIGHUP: {
 156             char *c = pa_full_status_string(userdata);
 157             pa_log_notice("%s", c);
 158             pa_xfree(c);
 159             return;
 160         }
 161 #endif
 162
 163         case SIGINT:
 164         case SIGTERM:
 165         default:
 166             pa_log_info(_("Exiting."));
 167             m->quit(m, 1);
 168             break;
 169     }
 170 }
 171
 172 #if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
 173
 174 static int change_user(void) {
 175     struct passwd *pw;
 176     struct group * gr;
 177     int r;
 178
 179     /* This function is called only in system-wide mode. It creates a
 180      * runtime dir in /var/run/ with proper UID/GID and drops privs
 181      * afterwards. */
 182
 183     if (!(pw = getpwnam(PA_SYSTEM_USER))) {
 184         pa_log(_("Failed to find user '%s'."), PA_SYSTEM_USER);
 185         return -1;
 186     }
 187
 188     if (!(gr = getgrnam(PA_SYSTEM_GROUP))) {
 189         pa_log(_("Failed to find group '%s'."), PA_SYSTEM_GROUP);
 190         return -1;
 191     }
 192
 193     pa_log_info(_("Found user '%s' (UID %lu) and group '%s' (GID %lu)."),
 194                 PA_SYSTEM_USER, (unsigned long) pw->pw_uid,
 195                 PA_SYSTEM_GROUP, (unsigned long) gr->gr_gid);
 196
 197     if (pw->pw_gid != gr->gr_gid) {
 198         pa_log(_("GID of user '%s' and of group '%s' don't match."), PA_SYSTEM_USER, PA_SYSTEM_GROUP);
 199         return -1;
 200     }
 201
 202     if (!pa_streq(pw->pw_dir, PA_SYSTEM_RUNTIME_PATH))
 203         pa_log_warn(_("Home directory of user '%s' is not '%s', ignoring."), PA_SYSTEM_USER, PA_SYSTEM_RUNTIME_PATH);
 204
 205     if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH, 0755, pw->pw_uid, gr->gr_gid, TRUE) < 0) {
 206         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_RUNTIME_PATH, pa_cstrerror(errno));
 207         return -1;
 208     }
 209
 210     if (pa_make_secure_dir(PA_SYSTEM_STATE_PATH, 0700, pw->pw_uid, gr->gr_gid, TRUE) < 0) {
 211         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_STATE_PATH, pa_cstrerror(errno));
 212         return -1;
 213     }
 214
 215     /* We don't create the config dir here, because we don't need to write to it */
 216
 217     if (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
 218         pa_log(_("Failed to change group list: %s"), pa_cstrerror(errno));
 219         return -1;
 220     }
 221
 222 #if defined(HAVE_SETRESGID)
 223     r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
 224 #elif defined(HAVE_SETEGID)
 225     if ((r = setgid(gr->gr_gid)) >= 0)
 226         r = setegid(gr->gr_gid);
 227 #elif defined(HAVE_SETREGID)
 228     r = setregid(gr->gr_gid, gr->gr_gid);
 229 #else
 230 #error "No API to drop privileges"
 231 #endif
 232
 233     if (r < 0) {
 234         pa_log(_("Failed to change GID: %s"), pa_cstrerror(errno));
 235         return -1;
 236     }
 237
 238 #if defined(HAVE_SETRESUID)
 239     r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
 240 #elif defined(HAVE_SETEUID)
 241     if ((r = setuid(pw->pw_uid)) >= 0)
 242         r = seteuid(pw->pw_uid);
 243 #elif defined(HAVE_SETREUID)
 244     r = setreuid(pw->pw_uid, pw->pw_uid);
 245 #else
 246 #error "No API to drop privileges"
 247 #endif
 248
 249     if (r < 0) {
 250         pa_log(_("Failed to change UID: %s"), pa_cstrerror(errno));
 251         return -1;
 252     }
 253
 254     pa_drop_caps();
 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     if (!getenv("PULSE_RUNTIME_PATH"))
 263         pa_set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
 264
 265     if (!getenv("PULSE_CONFIG_PATH"))
 266         pa_set_env("PULSE_CONFIG_PATH", PA_SYSTEM_CONFIG_PATH);
 267
 268     if (!getenv("PULSE_STATE_PATH"))
 269         pa_set_env("PULSE_STATE_PATH", PA_SYSTEM_STATE_PATH);
 270
 271     pa_log_info(_("Successfully changed user to \"" PA_SYSTEM_USER "\"."));
 272
 273     return 0;
 274 }
 275
 276 #else /* HAVE_PWD_H && HAVE_GRP_H */
 277
 278 static int change_user(void) {
 279     pa_log(_("System wide mode unsupported on this platform."));
 280     return -1;
 281 }
 282
 283 #endif /* HAVE_PWD_H && HAVE_GRP_H */
 284
 285 #ifdef HAVE_SYS_RESOURCE_H
 286
 287 static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
 288     struct rlimit rl;
 289     pa_assert(r);
 290
 291     if (!r->is_set)
 292         return 0;
 293
 294     rl.rlim_cur = rl.rlim_max = r->value;
 295
 296     if (setrlimit(resource, &rl) < 0) {
 297         pa_log_info(_("setrlimit(%s, (%u, %u)) failed: %s"), name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
 298         return -1;
 299     }
 300
 301     return 0;
 302 }
 303
 304 static void set_all_rlimits(const pa_daemon_conf *conf) {
 305     set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
 306     set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
 307     set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
 308     set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
 309 #ifdef RLIMIT_RSS
 310     set_one_rlimit(&conf->rlimit_rss, RLIMIT_RSS, "RLIMIT_RSS");
 311 #endif
 312 #ifdef RLIMIT_NPROC
 313     set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
 314 #endif
 315 #ifdef RLIMIT_NOFILE
 316     set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
 317 #endif
 318 #ifdef RLIMIT_MEMLOCK
 319     set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
 320 #endif
 321 #ifdef RLIMIT_AS
 322     set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
 323 #endif
 324 #ifdef RLIMIT_LOCKS
 325     set_one_rlimit(&conf->rlimit_locks, RLIMIT_LOCKS, "RLIMIT_LOCKS");
 326 #endif
 327 #ifdef RLIMIT_SIGPENDING
 328     set_one_rlimit(&conf->rlimit_sigpending, RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING");
 329 #endif
 330 #ifdef RLIMIT_MSGQUEUE
 331     set_one_rlimit(&conf->rlimit_msgqueue, RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE");
 332 #endif
 333 #ifdef RLIMIT_NICE
 334     set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
 335 #endif
 336 #ifdef RLIMIT_RTPRIO
 337     set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
 338 #endif
 339 #ifdef RLIMIT_RTTIME
 340     set_one_rlimit(&conf->rlimit_rttime, RLIMIT_RTTIME, "RLIMIT_RTTIME");
 341 #endif
 342 }
 343 #endif
 344
 345 static char *check_configured_address(void) {
 346     char *default_server = NULL;
 347     pa_client_conf *c = pa_client_conf_new();
 348
 349     pa_client_conf_load(c, NULL);
 350 #ifdef HAVE_X11
 351     pa_client_conf_from_x11(c, NULL);
 352 #endif
 353     pa_client_conf_env(c);
 354
 355     if (c->default_server && *c->default_server)
 356         default_server = pa_xstrdup(c->default_server);
 357
 358     pa_client_conf_free(c);
 359
 360     return default_server;
 361 }
 362
 363 #ifdef HAVE_DBUS
 364 static pa_dbus_connection *register_dbus_name(pa_core *c, DBusBusType bus, const char* name) {
 365     DBusError error;
 366     pa_dbus_connection *conn;
 367
 368     dbus_error_init(&error);
 369
 370     if (!(conn = pa_dbus_bus_get(c, bus, &error)) || dbus_error_is_set(&error)) {
 371         pa_log_warn("Unable to contact D-Bus: %s: %s", error.name, error.message);
 372         goto fail;
 373     }
 374
 375     if (dbus_bus_request_name(pa_dbus_connection_get(conn), name, DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) == DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
 376         pa_log_debug("Got %s!", name);
 377         return conn;
 378     }
 379
 380     if (dbus_error_is_set(&error))
 381         pa_log_error("Failed to acquire %s: %s: %s", name, error.name, error.message);
 382     else
 383         pa_log_error("D-Bus name %s already taken.", name);
 384
 385     /* PA cannot be started twice by the same user and hence we can
 386      * ignore mostly the case that a name is already taken. */
 387
 388 fail:
 389     if (conn)
 390         pa_dbus_connection_unref(conn);
 391
 392     dbus_error_free(&error);
 393     return NULL;
 394 }
 395 #endif
 396
 397 int main(int argc, char *argv[]) {
 398     pa_core *c = NULL;
 399     pa_strbuf *buf = NULL;
 400     pa_daemon_conf *conf = NULL;
 401     pa_mainloop *mainloop = NULL;
 402     char *s;
 403     char *configured_address;
 404     int r = 0, retval = 1, d = 0;
 405     pa_bool_t valid_pid_file = FALSE;
 406     pa_bool_t ltdl_init = FALSE;
 407     int passed_fd = -1;
 408     const char *e;
 409 #ifdef HAVE_FORK
 410     int daemon_pipe[2] = { -1, -1 };
 411     int daemon_pipe2[2] = { -1, -1 };
 412 #endif
 413 #ifdef OS_IS_WIN32
 414     pa_time_event *win32_timer;
 415     struct timeval win32_tv;
 416 #endif
 417     int autospawn_fd = -1;
 418     pa_bool_t autospawn_locked = FALSE;
 419 #ifdef HAVE_DBUS
 420     pa_dbusobj_server_lookup *server_lookup = NULL; /* /org/pulseaudio/server_lookup */
 421     pa_dbus_connection *lookup_service_bus = NULL; /* Always the user bus. */
 422     pa_dbus_connection *server_bus = NULL; /* The bus where we reserve org.pulseaudio.Server, either the user or the system bus. */
 423     pa_bool_t start_server;
 424 #endif
 425
 426     pa_log_set_ident("pulseaudio");
 427     pa_log_set_level(PA_LOG_NOTICE);
 428     pa_log_set_flags(PA_LOG_COLORS|PA_LOG_PRINT_FILE|PA_LOG_PRINT_LEVEL, PA_LOG_RESET);
 429
 430 #if defined(__linux__) && defined(__OPTIMIZE__)
 431     /*
 432        Disable lazy relocations to make usage of external libraries
 433        more deterministic for our RT threads. We abuse __OPTIMIZE__ as
 434        a check whether we are a debug build or not. This all is
 435        admittedly a bit snake-oilish.
 436     */
 437
 438     if (!getenv("LD_BIND_NOW")) {
 439         char *rp;
 440         char *canonical_rp;
 441
 442         /* We have to execute ourselves, because the libc caches the
 443          * value of $LD_BIND_NOW on initialization. */
 444
 445         pa_set_env("LD_BIND_NOW", "1");
 446
 447         if ((canonical_rp = pa_realpath(PA_BINARY))) {
 448
 449             if ((rp = pa_readlink("/proc/self/exe"))) {
 450
 451                 if (pa_streq(rp, canonical_rp))
 452                     pa_assert_se(execv(rp, argv) == 0);
 453                 else
 454                     pa_log_warn("/proc/self/exe does not point to %s, cannot self execute. Are you playing games?", canonical_rp);
 455
 456                 pa_xfree(rp);
 457
 458             } else
 459                 pa_log_warn("Couldn't read /proc/self/exe, cannot self execute. Running in a chroot()?");
 460
 461             pa_xfree(canonical_rp);
 462
 463         } else
 464             pa_log_warn("Couldn't canonicalize binary path, cannot self execute.");
 465     }
 466 #endif
 467
 468     if ((e = getenv("PULSE_PASSED_FD"))) {
 469         passed_fd = atoi(e);
 470
 471         if (passed_fd <= 2)
 472             passed_fd = -1;
 473     }
 474
 475     /* We might be autospawned, in which case have no idea in which
 476      * context we have been started. Let's cleanup our execution
 477      * context as good as possible */
 478
 479     pa_reset_personality();
 480     pa_drop_root();
 481     pa_close_all(passed_fd, -1);
 482     pa_reset_sigs(-1);
 483     pa_unblock_sigs(-1);
 484     pa_reset_priority();
 485
 486     setlocale(LC_ALL, "");
 487     pa_init_i18n();
 488
 489     conf = pa_daemon_conf_new();
 490
 491     if (pa_daemon_conf_load(conf, NULL) < 0)
 492         goto finish;
 493
 494     if (pa_daemon_conf_env(conf) < 0)
 495         goto finish;
 496
 497     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 498         pa_log(_("Failed to parse command line."));
 499         goto finish;
 500     }
 501
 502     pa_log_set_level(conf->log_level);
 503     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target);
 504     if (conf->log_meta)
 505         pa_log_set_flags(PA_LOG_PRINT_META, PA_LOG_SET);
 506     if (conf->log_time)
 507         pa_log_set_flags(PA_LOG_PRINT_TIME, PA_LOG_SET);
 508     pa_log_set_show_backtrace(conf->log_backtrace);
 509
 510 #ifdef HAVE_DBUS
 511     /* conf->system_instance and conf->local_server_type control almost the
 512      * same thing; make them agree about what is requested. */
 513     switch (conf->local_server_type) {
 514         case PA_SERVER_TYPE_UNSET:
 515             conf->local_server_type = conf->system_instance ? PA_SERVER_TYPE_SYSTEM : PA_SERVER_TYPE_USER;
 516             break;
 517         case PA_SERVER_TYPE_USER:
 518         case PA_SERVER_TYPE_NONE:
 519             conf->system_instance = FALSE;
 520             break;
 521         case PA_SERVER_TYPE_SYSTEM:
 522             conf->system_instance = TRUE;
 523             break;
 524         default:
 525             pa_assert_not_reached();
 526     }
 527
 528     start_server = conf->local_server_type == PA_SERVER_TYPE_USER || (getuid() == 0 && conf->local_server_type == PA_SERVER_TYPE_SYSTEM);
 529
 530     if (!start_server && conf->local_server_type == PA_SERVER_TYPE_SYSTEM) {
 531         pa_log_notice(_("System mode refused for non-root user. Only starting the D-Bus server lookup service."));
 532         conf->system_instance = FALSE;
 533     }
 534 #endif
 535
 536     LTDL_SET_PRELOADED_SYMBOLS();
 537     pa_ltdl_init();
 538     ltdl_init = TRUE;
 539
 540     if (conf->dl_search_path)
 541         lt_dlsetsearchpath(conf->dl_search_path);
 542
 543 #ifdef OS_IS_WIN32
 544     {
 545         WSADATA data;
 546         WSAStartup(MAKEWORD(2, 0), &data);
 547     }
 548 #endif
 549
 550     pa_random_seed();
 551
 552     switch (conf->cmd) {
 553         case PA_CMD_DUMP_MODULES:
 554             pa_dump_modules(conf, argc-d, argv+d);
 555             retval = 0;
 556             goto finish;
 557
 558         case PA_CMD_DUMP_CONF: {
 559
 560             if (d < argc) {
 561                 pa_log("Too many arguments.\n");
 562                 goto finish;
 563             }
 564
 565             s = pa_daemon_conf_dump(conf);
 566             fputs(s, stdout);
 567             pa_xfree(s);
 568             retval = 0;
 569             goto finish;
 570         }
 571
 572         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 573             int i;
 574
 575             if (d < argc) {
 576                 pa_log("Too many arguments.\n");
 577                 goto finish;
 578             }
 579
 580             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 581                 if (pa_resample_method_supported(i))
 582                     printf("%s\n", pa_resample_method_to_string(i));
 583
 584             retval = 0;
 585             goto finish;
 586         }
 587
 588         case PA_CMD_HELP :
 589             pa_cmdline_help(argv[0]);
 590             retval = 0;
 591             goto finish;
 592
 593         case PA_CMD_VERSION :
 594
 595             if (d < argc) {
 596                 pa_log("Too many arguments.\n");
 597                 goto finish;
 598             }
 599
 600             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 601             retval = 0;
 602             goto finish;
 603
 604         case PA_CMD_CHECK: {
 605             pid_t pid;
 606
 607             if (d < argc) {
 608                 pa_log("Too many arguments.\n");
 609                 goto finish;
 610             }
 611
 612             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 613                 pa_log_info(_("Daemon not running"));
 614             else {
 615                 pa_log_info(_("Daemon running as PID %u"), pid);
 616                 retval = 0;
 617             }
 618
 619             goto finish;
 620
 621         }
 622         case PA_CMD_KILL:
 623
 624             if (d < argc) {
 625                 pa_log("Too many arguments.\n");
 626                 goto finish;
 627             }
 628
 629             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 630                 pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno));
 631             else
 632                 retval = 0;
 633
 634             goto finish;
 635
 636         case PA_CMD_CLEANUP_SHM:
 637
 638             if (d < argc) {
 639                 pa_log("Too many arguments.\n");
 640                 goto finish;
 641             }
 642
 643             if (pa_shm_cleanup() >= 0)
 644                 retval = 0;
 645
 646             goto finish;
 647
 648         default:
 649             pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START);
 650     }
 651
 652     if (d < argc) {
 653         pa_log("Too many arguments.\n");
 654         goto finish;
 655     }
 656
 657 #ifdef HAVE_GETUID
 658     if (getuid() == 0 && !conf->system_instance)
 659         pa_log_warn(_("This program is not intended to be run as root (unless --system is specified)."));
 660 #ifndef HAVE_DBUS /* A similar, only a notice worthy check was done earlier, if D-Bus is enabled. */
 661     else if (getuid() != 0 && conf->system_instance) {
 662         pa_log(_("Root privileges required."));
 663         goto finish;
 664     }
 665 #endif
 666 #endif  /* HAVE_GETUID */
 667
 668     if (conf->cmd == PA_CMD_START && conf->system_instance) {
 669         pa_log(_("--start not supported for system instances."));
 670         goto finish;
 671     }
 672
 673     if (conf->cmd == PA_CMD_START && (configured_address = check_configured_address())) {
 674         /* There is an server address in our config, but where did it come from?
 675          * By default a standard X11 login will load module-x11-publish which will
 676          * inject PULSE_SERVER X11 property. If the PA daemon crashes, we will end
 677          * up hitting this code path. So we have to check to see if our configured_address
 678          * is the same as the value that would go into this property so that we can
 679          * recover (i.e. autospawn) from a crash.
 680          */
 681         char *ufn;
 682         pa_bool_t start_anyway = FALSE;
 683
 684         if ((ufn = pa_runtime_path(PA_NATIVE_DEFAULT_UNIX_SOCKET))) {
 685             char *id;
 686
 687             if ((id = pa_machine_id())) {
 688                 pa_strlist *server_list;
 689                 char formatted_ufn[256];
 690
 691                 pa_snprintf(formatted_ufn, sizeof(formatted_ufn), "{%s}unix:%s", id, ufn);
 692                 pa_xfree(id);
 693
 694                 if ((server_list = pa_strlist_parse(configured_address))) {
 695                     char *u = NULL;
 696
 697                     /* We only need to check the first server */
 698                     server_list = pa_strlist_pop(server_list, &u);
 699                     pa_strlist_free(server_list);
 700
 701                     start_anyway = (u && pa_streq(formatted_ufn, u));
 702                     pa_xfree(u);
 703                 }
 704             }
 705             pa_xfree(ufn);
 706         }
 707
 708         if (!start_anyway) {
 709             pa_log_notice(_("User-configured server at %s, refusing to start/autospawn."), configured_address);
 710             pa_xfree(configured_address);
 711             retval = 0;
 712             goto finish;
 713         }
 714
 715         pa_log_notice(_("User-configured server at %s, which appears to be local. Probing deeper."), configured_address);
 716         pa_xfree(configured_address);
 717     }
 718
 719     if (conf->system_instance && !conf->disallow_exit)
 720         pa_log_warn(_("Running in system mode, but --disallow-exit not set!"));
 721
 722     if (conf->system_instance && !conf->disallow_module_loading)
 723         pa_log_warn(_("Running in system mode, but --disallow-module-loading not set!"));
 724
 725     if (conf->system_instance && !conf->disable_shm) {
 726         pa_log_notice(_("Running in system mode, forcibly disabling SHM mode!"));
 727         conf->disable_shm = TRUE;
 728     }
 729
 730     if (conf->system_instance && conf->exit_idle_time >= 0) {
 731         pa_log_notice(_("Running in system mode, forcibly disabling exit idle time!"));
 732         conf->exit_idle_time = -1;
 733     }
 734
 735     if (conf->cmd == PA_CMD_START) {
 736         /* If we shall start PA only when it is not running yet, we
 737          * first take the autospawn lock to make things
 738          * synchronous. */
 739
 740         if ((autospawn_fd = pa_autospawn_lock_init()) < 0) {
 741             pa_log("Failed to initialize autospawn lock");
 742             goto finish;
 743         }
 744
 745         if ((pa_autospawn_lock_acquire(TRUE) < 0)) {
 746             pa_log("Failed to acquire autospawn lock");
 747             goto finish;
 748         }
 749
 750         autospawn_locked = TRUE;
 751     }
 752
 753     if (conf->daemonize) {
 754 #ifdef HAVE_FORK
 755         pid_t child;
 756 #endif
 757
 758         if (pa_stdio_acquire() < 0) {
 759             pa_log(_("Failed to acquire stdio."));
 760             goto finish;
 761         }
 762
 763 #ifdef HAVE_FORK
 764         if (pipe(daemon_pipe) < 0) {
 765             pa_log(_("pipe() failed: %s"), pa_cstrerror(errno));
 766             goto finish;
 767         }
 768
 769         if ((child = fork()) < 0) {
 770             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 771             pa_close_pipe(daemon_pipe);
 772             goto finish;
 773         }
 774
 775         if (child != 0) {
 776             ssize_t n;
 777             /* Father */
 778
 779             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 780             daemon_pipe[1] = -1;
 781
 782             if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 783
 784                 if (n < 0)
 785                     pa_log(_("read() failed: %s"), pa_cstrerror(errno));
 786
 787                 retval = 1;
 788             }
 789
 790             if (retval)
 791                 pa_log(_("Daemon startup failed."));
 792             else
 793                 pa_log_info(_("Daemon startup successful."));
 794
 795             goto finish;
 796         }
 797
 798         if (autospawn_fd >= 0) {
 799             /* The lock file is unlocked from the parent, so we need
 800              * to close it in the child */
 801
 802             pa_autospawn_lock_release();
 803             pa_autospawn_lock_done(TRUE);
 804
 805             autospawn_locked = FALSE;
 806             autospawn_fd = -1;
 807         }
 808
 809         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 810         daemon_pipe[0] = -1;
 811 #endif
 812
 813         if (conf->auto_log_target)
 814             pa_log_set_target(PA_LOG_SYSLOG);
 815
 816 #ifdef HAVE_SETSID
 817         if (setsid() < 0) {
 818             pa_log(_("setsid() failed: %s"), pa_cstrerror(errno));
 819             goto finish;
 820         }
 821 #endif
 822
 823 #ifdef HAVE_FORK
 824         /* We now are a session and process group leader. Let's fork
 825          * again and let the father die, so that we'll become a
 826          * process that can never acquire a TTY again, in a session and
 827          * process group without leader */
 828
 829         if (pipe(daemon_pipe2) < 0) {
 830             pa_log(_("pipe() failed: %s"), pa_cstrerror(errno));
 831             goto finish;
 832         }
 833
 834         if ((child = fork()) < 0) {
 835             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 836             pa_close_pipe(daemon_pipe2);
 837             goto finish;
 838         }
 839
 840         if (child != 0) {
 841             ssize_t n;
 842             /* Father */
 843
 844             pa_assert_se(pa_close(daemon_pipe2[1]) == 0);
 845             daemon_pipe2[1] = -1;
 846
 847             if ((n = pa_loop_read(daemon_pipe2[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 848
 849                 if (n < 0)
 850                     pa_log(_("read() failed: %s"), pa_cstrerror(errno));
 851
 852                 retval = 1;
 853             }
 854
 855             /* We now have to take care of signalling the first fork with
 856              * the return value we've received from this fork... */
 857             pa_assert(daemon_pipe[1] >= 0);
 858
 859             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 860             pa_close(daemon_pipe[1]);
 861             daemon_pipe[1] = -1;
 862
 863             goto finish;
 864         }
 865
 866         pa_assert_se(pa_close(daemon_pipe2[0]) == 0);
 867         daemon_pipe2[0] = -1;
 868
 869         /* We no longer need the (first) daemon_pipe as it's handled in our child above */
 870         pa_close_pipe(daemon_pipe);
 871 #endif
 872
 873 #ifdef SIGTTOU
 874         signal(SIGTTOU, SIG_IGN);
 875 #endif
 876 #ifdef SIGTTIN
 877         signal(SIGTTIN, SIG_IGN);
 878 #endif
 879 #ifdef SIGTSTP
 880         signal(SIGTSTP, SIG_IGN);
 881 #endif
 882
 883         pa_nullify_stdfds();
 884     }
 885
 886     pa_set_env_and_record("PULSE_INTERNAL", "1");
 887     pa_assert_se(chdir("/") == 0);
 888     umask(0022);
 889
 890 #ifdef HAVE_SYS_RESOURCE_H
 891     set_all_rlimits(conf);
 892 #endif
 893     pa_rtclock_hrtimer_enable();
 894
 895     pa_raise_priority(conf->nice_level);
 896
 897     if (conf->system_instance)
 898         if (change_user() < 0)
 899             goto finish;
 900
 901     pa_set_env_and_record("PULSE_SYSTEM", conf->system_instance ? "1" : "0");
 902
 903     pa_log_info(_("This is PulseAudio %s"), PACKAGE_VERSION);
 904     pa_log_debug(_("Compilation host: %s"), CANONICAL_HOST);
 905     pa_log_debug(_("Compilation CFLAGS: %s"), PA_CFLAGS);
 906
 907     s = pa_uname_string();
 908     pa_log_debug(_("Running on host: %s"), s);
 909     pa_xfree(s);
 910
 911     pa_log_debug(_("Found %u CPUs."), pa_ncpus());
 912
 913     pa_log_info(_("Page size is %lu bytes"), (unsigned long) PA_PAGE_SIZE);
 914
 915 #ifdef HAVE_VALGRIND_MEMCHECK_H
 916     pa_log_debug(_("Compiled with Valgrind support: yes"));
 917 #else
 918     pa_log_debug(_("Compiled with Valgrind support: no"));
 919 #endif
 920
 921     pa_log_debug(_("Running in valgrind mode: %s"), pa_yes_no(pa_in_valgrind()));
 922
 923     pa_log_debug(_("Running in VM: %s"), pa_yes_no(pa_running_in_vm()));
 924
 925 #ifdef __OPTIMIZE__
 926     pa_log_debug(_("Optimized build: yes"));
 927 #else
 928     pa_log_debug(_("Optimized build: no"));
 929 #endif
 930
 931 #ifdef NDEBUG
 932     pa_log_debug(_("NDEBUG defined, all asserts disabled."));
 933 #elif defined(FASTPATH)
 934     pa_log_debug(_("FASTPATH defined, only fast path asserts disabled."));
 935 #else
 936     pa_log_debug(_("All asserts enabled."));
 937 #endif
 938
 939     if (!(s = pa_machine_id())) {
 940         pa_log(_("Failed to get machine ID"));
 941         goto finish;
 942     }
 943     pa_log_info(_("Machine ID is %s."), s);
 944     pa_xfree(s);
 945
 946     if ((s = pa_session_id())) {
 947         pa_log_info(_("Session ID is %s."), s);
 948         pa_xfree(s);
 949     }
 950
 951     if (!(s = pa_get_runtime_dir()))
 952         goto finish;
 953     pa_log_info(_("Using runtime directory %s."), s);
 954     pa_xfree(s);
 955
 956     if (!(s = pa_get_state_dir()))
 957         goto finish;
 958     pa_log_info(_("Using state directory %s."), s);
 959     pa_xfree(s);
 960
 961     pa_log_info(_("Using modules directory %s."), conf->dl_search_path);
 962
 963     pa_log_info(_("Running in system mode: %s"), pa_yes_no(pa_in_system_mode()));
 964
 965     if (pa_in_system_mode())
 966         pa_log_warn(_("OK, so you are running PA in system mode. Please note that you most likely shouldn't be doing that.\n"
 967                       "If you do it nonetheless then it's your own fault if things don't work as expected.\n"
 968                       "Please read http://pulseaudio.org/wiki/WhatIsWrongWithSystemMode for an explanation why system mode is usually a bad idea."));
 969
 970     if (conf->use_pid_file) {
 971         int z;
 972
 973         if ((z = pa_pid_file_create("pulseaudio")) != 0) {
 974
 975             if (conf->cmd == PA_CMD_START && z > 0) {
 976                 /* If we are already running and with are run in
 977                  * --start mode, then let's return this as success. */
 978
 979                 retval = 0;
 980                 goto finish;
 981             }
 982
 983             pa_log(_("pa_pid_file_create() failed."));
 984             goto finish;
 985         }
 986
 987         valid_pid_file = TRUE;
 988     }
 989
 990     pa_disable_sigpipe();
 991
 992     if (pa_rtclock_hrtimer())
 993         pa_log_info(_("Fresh high-resolution timers available! Bon appetit!"));
 994     else
 995         pa_log_info(_("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!"));
 996
 997     if (conf->lock_memory) {
 998 #ifdef HAVE_SYS_MMAN_H
 999         if (mlockall(MCL_FUTURE) < 0)
1000             pa_log_warn("mlockall() failed: %s", pa_cstrerror(errno));
1001         else
1002             pa_log_info("Successfully locked process into memory.");
1003 #else
1004         pa_log_warn("Memory locking requested but not supported on platform.");
1005 #endif
1006     }
1007
1008     pa_memtrap_install();
1009
1010     pa_assert_se(mainloop = pa_mainloop_new());
1011
1012     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm, conf->shm_size))) {
1013         pa_log(_("pa_core_new() failed."));
1014         goto finish;
1015     }
1016
1017     c->default_sample_spec = conf->default_sample_spec;
1018     c->alternate_sample_rate = conf->alternate_sample_rate;
1019     c->default_channel_map = conf->default_channel_map;
1020     c->default_n_fragments = conf->default_n_fragments;
1021     c->default_fragment_size_msec = conf->default_fragment_size_msec;
1022     c->deferred_volume_safety_margin_usec = conf->deferred_volume_safety_margin_usec;
1023     c->deferred_volume_extra_delay_usec = conf->deferred_volume_extra_delay_usec;
1024     c->exit_idle_time = conf->exit_idle_time;
1025     c->scache_idle_time = conf->scache_idle_time;
1026     c->resample_method = conf->resample_method;
1027     c->realtime_priority = conf->realtime_priority;
1028     c->realtime_scheduling = !!conf->realtime_scheduling;
1029     c->disable_remixing = !!conf->disable_remixing;
1030     c->disable_lfe_remixing = !!conf->disable_lfe_remixing;
1031     c->deferred_volume = !!conf->deferred_volume;
1032     c->running_as_daemon = !!conf->daemonize;
1033     c->disallow_exit = conf->disallow_exit;
1034     c->flat_volumes = conf->flat_volumes;
1035 #ifdef HAVE_DBUS
1036     c->server_type = conf->local_server_type;
1037 #endif
1038
1039     c->cpu_info.cpu_type = PA_CPU_UNDEFINED;
1040     if (!getenv("PULSE_NO_SIMD")) {
1041         if (pa_cpu_init_x86(&(c->cpu_info.flags.x86)))
1042             c->cpu_info.cpu_type = PA_CPU_X86;
1043         if (pa_cpu_init_arm(&(c->cpu_info.flags.arm)))
1044             c->cpu_info.cpu_type = PA_CPU_ARM;
1045         pa_cpu_init_orc(c->cpu_info);
1046     }
1047
1048     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
1049     pa_signal_new(SIGINT, signal_callback, c);
1050     pa_signal_new(SIGTERM, signal_callback, c);
1051 #ifdef SIGUSR1
1052     pa_signal_new(SIGUSR1, signal_callback, c);
1053 #endif
1054 #ifdef SIGUSR2
1055     pa_signal_new(SIGUSR2, signal_callback, c);
1056 #endif
1057 #ifdef SIGHUP
1058     pa_signal_new(SIGHUP, signal_callback, c);
1059 #endif
1060
1061 #ifdef OS_IS_WIN32
1062     win32_timer = pa_mainloop_get_api(mainloop)->time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL);
1063 #endif
1064
1065     if (!conf->no_cpu_limit)
1066         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
1067
1068     buf = pa_strbuf_new();
1069
1070 #ifdef HAVE_DBUS
1071     pa_assert_se(dbus_threads_init_default());
1072
1073     if (start_server) {
1074 #endif
1075         if (conf->load_default_script_file) {
1076             FILE *f;
1077
1078             if ((f = pa_daemon_conf_open_default_script_file(conf))) {
1079                 r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
1080                 fclose(f);
1081             }
1082         }
1083
1084         if (r >= 0)
1085             r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
1086
1087         pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
1088         pa_xfree(s);
1089
1090         if (r < 0 && conf->fail) {
1091             pa_log(_("Failed to initialize daemon."));
1092             goto finish;
1093         }
1094
1095         if (!c->modules || pa_idxset_size(c->modules) == 0) {
1096             pa_log(_("Daemon startup without any loaded modules, refusing to work."));
1097             goto finish;
1098         }
1099 #ifdef HAVE_DBUS
1100     } else {
1101         /* When we just provide the D-Bus server lookup service, we don't want
1102          * any modules to be loaded. We haven't loaded any so far, so one might
1103          * think there's no way to contact the server, but receiving certain
1104          * signals could still cause modules to load. */
1105         conf->disallow_module_loading = TRUE;
1106     }
1107 #endif
1108
1109     /* We completed the initial module loading, so let's disable it
1110      * from now on, if requested */
1111     c->disallow_module_loading = !!conf->disallow_module_loading;
1112
1113 #ifdef HAVE_DBUS
1114     if (!conf->system_instance) {
1115         if ((server_lookup = pa_dbusobj_server_lookup_new(c))) {
1116             if (!(lookup_service_bus = register_dbus_name(c, DBUS_BUS_SESSION, "org.PulseAudio1")))
1117                 goto finish;
1118         }
1119     }
1120
1121     if (start_server)
1122         server_bus = register_dbus_name(c, conf->system_instance ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, "org.pulseaudio.Server");
1123 #endif
1124
1125 #ifdef HAVE_FORK
1126     if (daemon_pipe2[1] >= 0) {
1127         int ok = 0;
1128         pa_loop_write(daemon_pipe2[1], &ok, sizeof(ok), NULL);
1129         pa_close(daemon_pipe2[1]);
1130         daemon_pipe2[1] = -1;
1131     }
1132 #endif
1133
1134     pa_log_info(_("Daemon startup complete."));
1135
1136     retval = 0;
1137     if (pa_mainloop_run(mainloop, &retval) < 0)
1138         goto finish;
1139
1140     pa_log_info(_("Daemon shutdown initiated."));
1141
1142 finish:
1143 #ifdef HAVE_DBUS
1144     if (server_bus)
1145         pa_dbus_connection_unref(server_bus);
1146     if (lookup_service_bus)
1147         pa_dbus_connection_unref(lookup_service_bus);
1148     if (server_lookup)
1149         pa_dbusobj_server_lookup_free(server_lookup);
1150 #endif
1151
1152     if (autospawn_fd >= 0) {
1153         if (autospawn_locked)
1154             pa_autospawn_lock_release();
1155
1156         pa_autospawn_lock_done(FALSE);
1157     }
1158
1159 #ifdef OS_IS_WIN32
1160     if (mainloop && win32_timer)
1161         pa_mainloop_get_api(mainloop)->time_free(win32_timer);
1162 #endif
1163
1164     if (c) {
1165         /* Ensure all the modules/samples are unloaded when the core is still ref'ed,
1166          * as unlink callback hooks in modules may need the core to be ref'ed */
1167         pa_module_unload_all(c);
1168         pa_scache_free_all(c);
1169
1170         pa_core_unref(c);
1171         pa_log_info(_("Daemon terminated."));
1172     }
1173
1174     if (!conf->no_cpu_limit)
1175         pa_cpu_limit_done();
1176
1177     pa_signal_done();
1178
1179 #ifdef HAVE_FORK
1180     /* If we have daemon_pipe[1] still open, this means we've failed after
1181      * the first fork, but before the second. Therefore just write to it. */
1182     if (daemon_pipe[1] >= 0)
1183         pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
1184     else if (daemon_pipe2[1] >= 0)
1185         pa_loop_write(daemon_pipe2[1], &retval, sizeof(retval), NULL);
1186
1187     pa_close_pipe(daemon_pipe2);
1188     pa_close_pipe(daemon_pipe);
1189 #endif
1190
1191     if (mainloop)
1192         pa_mainloop_free(mainloop);
1193
1194     if (conf)
1195         pa_daemon_conf_free(conf);
1196
1197     if (valid_pid_file)
1198         pa_pid_file_remove();
1199
1200     /* This has no real purpose except making things valgrind-clean */
1201     pa_unset_env_recorded();
1202
1203 #ifdef OS_IS_WIN32
1204     WSACleanup();
1205 #endif
1206
1207     if (ltdl_init)
1208         pa_ltdl_done();
1209
1210 #ifdef HAVE_DBUS
1211     dbus_shutdown();
1212 #endif
1213
1214     return retval;
1215 }