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 #ifdef HAVE_SYS_MMAN_H
  43 #include <sys/mman.h>
  44 #endif
  45
  46 #ifdef HAVE_SYS_IOCTL_H
  47 #include <sys/ioctl.h>
  48 #endif
  49
  50 #ifdef HAVE_PWD_H
  51 #include <pwd.h>
  52 #endif
  53 #ifdef HAVE_GRP_H
  54 #include <grp.h>
  55 #endif
  56
  57 #ifdef HAVE_LIBWRAP
  58 #include <syslog.h>
  59 #include <tcpd.h>
  60 #endif
  61
  62 #ifdef HAVE_DBUS
  63 #include <dbus/dbus.h>
  64 #endif
  65
  66 #include <pulse/mainloop.h>
  67 #include <pulse/mainloop-signal.h>
  68 #include <pulse/timeval.h>
  69 #include <pulse/xmalloc.h>
  70 #include <pulse/i18n.h>
  71
  72 #include <pulsecore/lock-autospawn.h>
  73 #include <pulsecore/winsock.h>
  74 #include <pulsecore/core-error.h>
  75 #include <pulsecore/core-rtclock.h>
  76 #include <pulsecore/core.h>
  77 #include <pulsecore/memblock.h>
  78 #include <pulsecore/module.h>
  79 #include <pulsecore/cli-command.h>
  80 #include <pulsecore/log.h>
  81 #include <pulsecore/core-util.h>
  82 #include <pulsecore/sioman.h>
  83 #include <pulsecore/cli-text.h>
  84 #include <pulsecore/pid.h>
  85 #include <pulsecore/namereg.h>
  86 #include <pulsecore/random.h>
  87 #include <pulsecore/macro.h>
  88 #include <pulsecore/mutex.h>
  89 #include <pulsecore/thread.h>
  90 #include <pulsecore/once.h>
  91 #include <pulsecore/shm.h>
  92 #include <pulsecore/memtrap.h>
  93 #ifdef HAVE_DBUS
  94 #include <pulsecore/dbus-shared.h>
  95 #endif
  96 #include <pulsecore/cpu-arm.h>
  97 #include <pulsecore/cpu-x86.h>
  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 #include "server-lookup.h"
 106
 107 #ifdef HAVE_LIBWRAP
 108 /* Only one instance of these variables */
 109 int allow_severity = LOG_INFO;
 110 int deny_severity = LOG_WARNING;
 111 #endif
 112
 113 #ifdef HAVE_OSS_WRAPPER
 114 /* padsp looks for this symbol in the running process and disables
 115  * itself if it finds it and it is set to 7 (which is actually a bit
 116  * mask). For details see padsp. */
 117 int __padsp_disabled__ = 7;
 118 #endif
 119
 120 #ifdef OS_IS_WIN32
 121
 122 static void message_cb(pa_mainloop_api*a, pa_time_event*e, const struct timeval *tv, void *userdata) {
 123     MSG msg;
 124     struct timeval tvnext;
 125
 126     while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 127         if (msg.message == WM_QUIT)
 128             raise(SIGTERM);
 129         else {
 130             TranslateMessage(&msg);
 131             DispatchMessage(&msg);
 132         }
 133     }
 134
 135     pa_timeval_add(pa_gettimeofday(&tvnext), 100000);
 136     a->rtclock_time_restart(e, &tvnext);
 137 }
 138
 139 #endif
 140
 141 static void signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 142     pa_log_info(_("Got signal %s."), pa_sig2str(sig));
 143
 144     switch (sig) {
 145 #ifdef SIGUSR1
 146         case SIGUSR1:
 147             pa_module_load(userdata, "module-cli", NULL);
 148             break;
 149 #endif
 150
 151 #ifdef SIGUSR2
 152         case SIGUSR2:
 153             pa_module_load(userdata, "module-cli-protocol-unix", NULL);
 154             break;
 155 #endif
 156
 157 #ifdef SIGHUP
 158         case SIGHUP: {
 159             char *c = pa_full_status_string(userdata);
 160             pa_log_notice("%s", c);
 161             pa_xfree(c);
 162             return;
 163         }
 164 #endif
 165
 166         case SIGINT:
 167         case SIGTERM:
 168         default:
 169             pa_log_info(_("Exiting."));
 170             m->quit(m, 1);
 171             break;
 172     }
 173 }
 174
 175 #if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
 176
 177 static int change_user(void) {
 178     struct passwd *pw;
 179     struct group * gr;
 180     int r;
 181
 182     /* This function is called only in system-wide mode. It creates a
 183      * runtime dir in /var/run/ with proper UID/GID and drops privs
 184      * afterwards. */
 185
 186     if (!(pw = getpwnam(PA_SYSTEM_USER))) {
 187         pa_log(_("Failed to find user '%s'."), PA_SYSTEM_USER);
 188         return -1;
 189     }
 190
 191     if (!(gr = getgrnam(PA_SYSTEM_GROUP))) {
 192         pa_log(_("Failed to find group '%s'."), PA_SYSTEM_GROUP);
 193         return -1;
 194     }
 195
 196     pa_log_info(_("Found user '%s' (UID %lu) and group '%s' (GID %lu)."),
 197                 PA_SYSTEM_USER, (unsigned long) pw->pw_uid,
 198                 PA_SYSTEM_GROUP, (unsigned long) gr->gr_gid);
 199
 200     if (pw->pw_gid != gr->gr_gid) {
 201         pa_log(_("GID of user '%s' and of group '%s' don't match."), PA_SYSTEM_USER, PA_SYSTEM_GROUP);
 202         return -1;
 203     }
 204
 205     if (strcmp(pw->pw_dir, PA_SYSTEM_RUNTIME_PATH) != 0)
 206         pa_log_warn(_("Home directory of user '%s' is not '%s', ignoring."), PA_SYSTEM_USER, PA_SYSTEM_RUNTIME_PATH);
 207
 208     if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH, 0755, pw->pw_uid, gr->gr_gid) < 0) {
 209         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_RUNTIME_PATH, pa_cstrerror(errno));
 210         return -1;
 211     }
 212
 213     if (pa_make_secure_dir(PA_SYSTEM_STATE_PATH, 0700, pw->pw_uid, gr->gr_gid) < 0) {
 214         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_STATE_PATH, pa_cstrerror(errno));
 215         return -1;
 216     }
 217
 218     /* We don't create the config dir here, because we don't need to write to it */
 219
 220     if (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
 221         pa_log(_("Failed to change group list: %s"), pa_cstrerror(errno));
 222         return -1;
 223     }
 224
 225 #if defined(HAVE_SETRESGID)
 226     r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
 227 #elif defined(HAVE_SETEGID)
 228     if ((r = setgid(gr->gr_gid)) >= 0)
 229         r = setegid(gr->gr_gid);
 230 #elif defined(HAVE_SETREGID)
 231     r = setregid(gr->gr_gid, gr->gr_gid);
 232 #else
 233 #error "No API to drop privileges"
 234 #endif
 235
 236     if (r < 0) {
 237         pa_log(_("Failed to change GID: %s"), pa_cstrerror(errno));
 238         return -1;
 239     }
 240
 241 #if defined(HAVE_SETRESUID)
 242     r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
 243 #elif defined(HAVE_SETEUID)
 244     if ((r = setuid(pw->pw_uid)) >= 0)
 245         r = seteuid(pw->pw_uid);
 246 #elif defined(HAVE_SETREUID)
 247     r = setreuid(pw->pw_uid, pw->pw_uid);
 248 #else
 249 #error "No API to drop privileges"
 250 #endif
 251
 252     if (r < 0) {
 253         pa_log(_("Failed to change UID: %s"), pa_cstrerror(errno));
 254         return -1;
 255     }
 256
 257     pa_set_env("USER", PA_SYSTEM_USER);
 258     pa_set_env("USERNAME", PA_SYSTEM_USER);
 259     pa_set_env("LOGNAME", PA_SYSTEM_USER);
 260     pa_set_env("HOME", PA_SYSTEM_RUNTIME_PATH);
 261
 262     /* Relevant for pa_runtime_path() */
 263     if (!getenv("PULSE_RUNTIME_PATH"))
 264         pa_set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
 265
 266     if (!getenv("PULSE_CONFIG_PATH"))
 267         pa_set_env("PULSE_CONFIG_PATH", PA_SYSTEM_CONFIG_PATH);
 268
 269     if (!getenv("PULSE_STATE_PATH"))
 270         pa_set_env("PULSE_STATE_PATH", PA_SYSTEM_STATE_PATH);
 271
 272     pa_log_info(_("Successfully dropped root privileges."));
 273
 274     return 0;
 275 }
 276
 277 #else /* HAVE_PWD_H && HAVE_GRP_H */
 278
 279 static int change_user(void) {
 280     pa_log(_("System wide mode unsupported on this platform."));
 281     return -1;
 282 }
 283
 284 #endif /* HAVE_PWD_H && HAVE_GRP_H */
 285
 286 #ifdef HAVE_SYS_RESOURCE_H
 287
 288 static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
 289     struct rlimit rl;
 290     pa_assert(r);
 291
 292     if (!r->is_set)
 293         return 0;
 294
 295     rl.rlim_cur = rl.rlim_max = r->value;
 296
 297     if (setrlimit(resource, &rl) < 0) {
 298         pa_log_info(_("setrlimit(%s, (%u, %u)) failed: %s"), name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
 299         return -1;
 300     }
 301
 302     return 0;
 303 }
 304
 305 static void set_all_rlimits(const pa_daemon_conf *conf) {
 306     set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
 307     set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
 308     set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
 309     set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
 310 #ifdef RLIMIT_RSS
 311     set_one_rlimit(&conf->rlimit_rss, RLIMIT_RSS, "RLIMIT_RSS");
 312 #endif
 313 #ifdef RLIMIT_NPROC
 314     set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
 315 #endif
 316 #ifdef RLIMIT_NOFILE
 317     set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
 318 #endif
 319 #ifdef RLIMIT_MEMLOCK
 320     set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
 321 #endif
 322 #ifdef RLIMIT_AS
 323     set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
 324 #endif
 325 #ifdef RLIMIT_LOCKS
 326     set_one_rlimit(&conf->rlimit_locks, RLIMIT_LOCKS, "RLIMIT_LOCKS");
 327 #endif
 328 #ifdef RLIMIT_SIGPENDING
 329     set_one_rlimit(&conf->rlimit_sigpending, RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING");
 330 #endif
 331 #ifdef RLIMIT_MSGQUEUE
 332     set_one_rlimit(&conf->rlimit_msgqueue, RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE");
 333 #endif
 334 #ifdef RLIMIT_NICE
 335     set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
 336 #endif
 337 #ifdef RLIMIT_RTPRIO
 338     set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
 339 #endif
 340 #ifdef RLIMIT_RTTIME
 341     set_one_rlimit(&conf->rlimit_rttime, RLIMIT_RTTIME, "RLIMIT_RTTIME");
 342 #endif
 343 }
 344 #endif
 345
 346 #ifdef HAVE_DBUS
 347 static pa_dbus_connection *register_dbus_name(pa_core *c, DBusBusType bus, const char* name) {
 348     DBusError error;
 349     pa_dbus_connection *conn;
 350
 351     dbus_error_init(&error);
 352
 353     if (!(conn = pa_dbus_bus_get(c, bus, &error)) || dbus_error_is_set(&error)) {
 354         pa_log_warn("Unable to contact D-Bus: %s: %s", error.name, error.message);
 355         goto fail;
 356     }
 357
 358     if (dbus_bus_request_name(pa_dbus_connection_get(conn), name, DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) == DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
 359         pa_log_debug("Got %s!", name);
 360         return conn;
 361     }
 362
 363     if (dbus_error_is_set(&error))
 364         pa_log_error("Failed to acquire %s: %s: %s", name, error.name, error.message);
 365     else
 366         pa_log_error("D-Bus name %s already taken. Weird shit!", name);
 367
 368     /* PA cannot be started twice by the same user and hence we can
 369      * ignore mostly the case that a name is already taken. */
 370
 371 fail:
 372     if (conn)
 373         pa_dbus_connection_unref(conn);
 374
 375     dbus_error_free(&error);
 376     return NULL;
 377 }
 378 #endif
 379
 380 int main(int argc, char *argv[]) {
 381     pa_core *c = NULL;
 382     pa_strbuf *buf = NULL;
 383     pa_daemon_conf *conf = NULL;
 384     pa_mainloop *mainloop = NULL;
 385     char *s;
 386     int r = 0, retval = 1, d = 0;
 387     pa_bool_t valid_pid_file = FALSE;
 388     pa_bool_t ltdl_init = FALSE;
 389     int passed_fd = -1;
 390     const char *e;
 391 #ifdef HAVE_FORK
 392     int daemon_pipe[2] = { -1, -1 };
 393 #endif
 394 #ifdef OS_IS_WIN32
 395     pa_time_event *win32_timer;
 396     struct timeval win32_tv;
 397 #endif
 398     int autospawn_fd = -1;
 399     pa_bool_t autospawn_locked = FALSE;
 400 #ifdef HAVE_DBUS
 401     pa_dbusobj_server_lookup *server_lookup = NULL; /* /org/pulseaudio/server_lookup */
 402     pa_dbus_connection *lookup_service_bus = NULL; /* Always the user bus. */
 403     pa_dbus_connection *server_bus = NULL; /* The bus where we reserve org.pulseaudio.Server, either the user or the system bus. */
 404     pa_bool_t start_server;
 405 #endif
 406
 407     pa_log_set_ident("pulseaudio");
 408     pa_log_set_level(PA_LOG_NOTICE);
 409     pa_log_set_flags(PA_LOG_COLORS|PA_LOG_PRINT_FILE|PA_LOG_PRINT_LEVEL, PA_LOG_RESET);
 410
 411 #if defined(__linux__) && defined(__OPTIMIZE__)
 412     /*
 413        Disable lazy relocations to make usage of external libraries
 414        more deterministic for our RT threads. We abuse __OPTIMIZE__ as
 415        a check whether we are a debug build or not. This all is
 416        admittedly a bit snake-oilish.
 417     */
 418
 419     if (!getenv("LD_BIND_NOW")) {
 420         char *rp;
 421         char *canonical_rp;
 422
 423         /* We have to execute ourselves, because the libc caches the
 424          * value of $LD_BIND_NOW on initialization. */
 425
 426         pa_set_env("LD_BIND_NOW", "1");
 427
 428         if ((canonical_rp = pa_realpath(PA_BINARY))) {
 429
 430             if ((rp = pa_readlink("/proc/self/exe"))) {
 431
 432                 if (pa_streq(rp, canonical_rp))
 433                     pa_assert_se(execv(rp, argv) == 0);
 434                 else
 435                     pa_log_warn("/proc/self/exe does not point to %s, cannot self execute. Are you playing games?", canonical_rp);
 436
 437                 pa_xfree(rp);
 438
 439             } else
 440                 pa_log_warn("Couldn't read /proc/self/exe, cannot self execute. Running in a chroot()?");
 441
 442             pa_xfree(canonical_rp);
 443
 444         } else
 445             pa_log_warn("Couldn't canonicalize binary path, cannot self execute.");
 446     }
 447 #endif
 448
 449     if ((e = getenv("PULSE_PASSED_FD"))) {
 450         passed_fd = atoi(e);
 451
 452         if (passed_fd <= 2)
 453             passed_fd = -1;
 454     }
 455
 456     /* We might be autospawned, in which case have no idea in which
 457      * context we have been started. Let's cleanup our execution
 458      * context as good as possible */
 459
 460     pa_reset_personality();
 461     pa_drop_root();
 462     pa_close_all(passed_fd, -1);
 463     pa_reset_sigs(-1);
 464     pa_unblock_sigs(-1);
 465     pa_reset_priority();
 466
 467     setlocale(LC_ALL, "");
 468     pa_init_i18n();
 469
 470     conf = pa_daemon_conf_new();
 471
 472     if (pa_daemon_conf_load(conf, NULL) < 0)
 473         goto finish;
 474
 475     if (pa_daemon_conf_env(conf) < 0)
 476         goto finish;
 477
 478     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 479         pa_log(_("Failed to parse command line."));
 480         goto finish;
 481     }
 482
 483     pa_log_set_level(conf->log_level);
 484     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target);
 485     if (conf->log_meta)
 486         pa_log_set_flags(PA_LOG_PRINT_META, PA_LOG_SET);
 487     if (conf->log_time)
 488         pa_log_set_flags(PA_LOG_PRINT_TIME, PA_LOG_SET);
 489     pa_log_set_show_backtrace(conf->log_backtrace);
 490
 491 #ifdef HAVE_DBUS
 492     /* conf->system_instance and conf->local_server_type control almost the
 493      * same thing; make them agree about what is requested. */
 494     switch (conf->local_server_type) {
 495         case PA_SERVER_TYPE_UNSET:
 496             conf->local_server_type = conf->system_instance ? PA_SERVER_TYPE_SYSTEM : PA_SERVER_TYPE_USER;
 497             break;
 498         case PA_SERVER_TYPE_USER:
 499         case PA_SERVER_TYPE_NONE:
 500             conf->system_instance = FALSE;
 501             break;
 502         case PA_SERVER_TYPE_SYSTEM:
 503             conf->system_instance = TRUE;
 504             break;
 505         default:
 506             pa_assert_not_reached();
 507     }
 508
 509     start_server = conf->local_server_type == PA_SERVER_TYPE_USER || (getuid() == 0 && conf->local_server_type == PA_SERVER_TYPE_SYSTEM);
 510
 511     if (!start_server && conf->local_server_type == PA_SERVER_TYPE_SYSTEM) {
 512         pa_log_notice(_("System mode refused for non-root user. Only starting the D-Bus server lookup service."));
 513         conf->system_instance = FALSE;
 514     }
 515 #endif
 516
 517     LTDL_SET_PRELOADED_SYMBOLS();
 518     pa_ltdl_init();
 519     ltdl_init = TRUE;
 520
 521     if (conf->dl_search_path)
 522         lt_dlsetsearchpath(conf->dl_search_path);
 523
 524 #ifdef OS_IS_WIN32
 525     {
 526         WSADATA data;
 527         WSAStartup(MAKEWORD(2, 0), &data);
 528     }
 529 #endif
 530
 531     pa_random_seed();
 532
 533     switch (conf->cmd) {
 534         case PA_CMD_DUMP_MODULES:
 535             pa_dump_modules(conf, argc-d, argv+d);
 536             retval = 0;
 537             goto finish;
 538
 539         case PA_CMD_DUMP_CONF: {
 540             s = pa_daemon_conf_dump(conf);
 541             fputs(s, stdout);
 542             pa_xfree(s);
 543             retval = 0;
 544             goto finish;
 545         }
 546
 547         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 548             int i;
 549
 550             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 551                 if (pa_resample_method_supported(i))
 552                     printf("%s\n", pa_resample_method_to_string(i));
 553
 554             retval = 0;
 555             goto finish;
 556         }
 557
 558         case PA_CMD_HELP :
 559             pa_cmdline_help(argv[0]);
 560             retval = 0;
 561             goto finish;
 562
 563         case PA_CMD_VERSION :
 564             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 565             retval = 0;
 566             goto finish;
 567
 568         case PA_CMD_CHECK: {
 569             pid_t pid;
 570
 571             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 572                 pa_log_info(_("Daemon not running"));
 573             else {
 574                 pa_log_info(_("Daemon running as PID %u"), pid);
 575                 retval = 0;
 576             }
 577
 578             goto finish;
 579
 580         }
 581         case PA_CMD_KILL:
 582
 583             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 584                 pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno));
 585             else
 586                 retval = 0;
 587
 588             goto finish;
 589
 590         case PA_CMD_CLEANUP_SHM:
 591
 592             if (pa_shm_cleanup() >= 0)
 593                 retval = 0;
 594
 595             goto finish;
 596
 597         default:
 598             pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START);
 599     }
 600
 601     if (getuid() == 0 && !conf->system_instance)
 602         pa_log_warn(_("This program is not intended to be run as root (unless --system is specified)."));
 603 #ifndef HAVE_DBUS /* A similar, only a notice worthy check was done earlier, if D-Bus is enabled. */
 604     else if (getuid() != 0 && conf->system_instance) {
 605         pa_log(_("Root privileges required."));
 606         goto finish;
 607     }
 608 #endif
 609
 610     if (conf->cmd == PA_CMD_START && conf->system_instance) {
 611         pa_log(_("--start not supported for system instances."));
 612         goto finish;
 613     }
 614
 615     if (conf->system_instance && !conf->disallow_exit)
 616         pa_log_warn(_("Running in system mode, but --disallow-exit not set!"));
 617
 618     if (conf->system_instance && !conf->disallow_module_loading)
 619         pa_log_warn(_("Running in system mode, but --disallow-module-loading not set!"));
 620
 621     if (conf->system_instance && !conf->disable_shm) {
 622         pa_log_notice(_("Running in system mode, forcibly disabling SHM mode!"));
 623         conf->disable_shm = TRUE;
 624     }
 625
 626     if (conf->system_instance && conf->exit_idle_time >= 0) {
 627         pa_log_notice(_("Running in system mode, forcibly disabling exit idle time!"));
 628         conf->exit_idle_time = -1;
 629     }
 630
 631     if (conf->cmd == PA_CMD_START) {
 632         /* If we shall start PA only when it is not running yet, we
 633          * first take the autospawn lock to make things
 634          * synchronous. */
 635
 636         if ((autospawn_fd = pa_autospawn_lock_init()) < 0) {
 637             pa_log("Failed to initialize autospawn lock");
 638             goto finish;
 639         }
 640
 641         if ((pa_autospawn_lock_acquire(TRUE) < 0)) {
 642             pa_log("Failed to acquire autospawn lock");
 643             goto finish;
 644         }
 645
 646         autospawn_locked = TRUE;
 647     }
 648
 649     if (conf->daemonize) {
 650         pid_t child;
 651
 652         if (pa_stdio_acquire() < 0) {
 653             pa_log(_("Failed to acquire stdio."));
 654             goto finish;
 655         }
 656
 657 #ifdef HAVE_FORK
 658         if (pipe(daemon_pipe) < 0) {
 659             pa_log(_("pipe() failed: %s"), pa_cstrerror(errno));
 660             goto finish;
 661         }
 662
 663         if ((child = fork()) < 0) {
 664             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 665             goto finish;
 666         }
 667
 668         if (child != 0) {
 669             ssize_t n;
 670             /* Father */
 671
 672             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 673             daemon_pipe[1] = -1;
 674
 675             if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 676
 677                 if (n < 0)
 678                     pa_log(_("read() failed: %s"), pa_cstrerror(errno));
 679
 680                 retval = 1;
 681             }
 682
 683             if (retval)
 684                 pa_log(_("Daemon startup failed."));
 685             else
 686                 pa_log_info(_("Daemon startup successful."));
 687
 688             goto finish;
 689         }
 690
 691         if (autospawn_fd >= 0) {
 692             /* The lock file is unlocked from the parent, so we need
 693              * to close it in the child */
 694
 695             pa_autospawn_lock_release();
 696             pa_autospawn_lock_done(TRUE);
 697
 698             autospawn_locked = FALSE;
 699             autospawn_fd = -1;
 700         }
 701
 702         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 703         daemon_pipe[0] = -1;
 704 #endif
 705
 706         if (conf->auto_log_target)
 707             pa_log_set_target(PA_LOG_SYSLOG);
 708
 709 #ifdef HAVE_SETSID
 710         if (setsid() < 0) {
 711             pa_log(_("setsid() failed: %s"), pa_cstrerror(errno));
 712             goto finish;
 713         }
 714 #endif
 715
 716         /* We now are a session and process group leader. Let's fork
 717          * again and let the father die, so that we'll become a
 718          * process that can never acquire a TTY again, in a session and
 719          * process group without leader */
 720
 721 #ifdef HAVE_FORK
 722         if ((child = fork()) < 0) {
 723             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 724             goto finish;
 725         }
 726
 727         if (child != 0) {
 728             retval = 0;
 729             goto finish;
 730         }
 731 #endif
 732
 733 #ifdef SIGTTOU
 734         signal(SIGTTOU, SIG_IGN);
 735 #endif
 736 #ifdef SIGTTIN
 737         signal(SIGTTIN, SIG_IGN);
 738 #endif
 739 #ifdef SIGTSTP
 740         signal(SIGTSTP, SIG_IGN);
 741 #endif
 742
 743         pa_nullify_stdfds();
 744     }
 745
 746     pa_set_env_and_record("PULSE_INTERNAL", "1");
 747     pa_assert_se(chdir("/") == 0);
 748     umask(0022);
 749
 750 #ifdef HAVE_SYS_RESOURCE_H
 751     set_all_rlimits(conf);
 752 #endif
 753     pa_rtclock_hrtimer_enable();
 754
 755     pa_raise_priority(conf->nice_level);
 756
 757     if (conf->system_instance)
 758         if (change_user() < 0)
 759             goto finish;
 760
 761     pa_set_env_and_record("PULSE_SYSTEM", conf->system_instance ? "1" : "0");
 762
 763     pa_log_info(_("This is PulseAudio %s"), PACKAGE_VERSION);
 764     pa_log_debug(_("Compilation host: %s"), CANONICAL_HOST);
 765     pa_log_debug(_("Compilation CFLAGS: %s"), PA_CFLAGS);
 766
 767     s = pa_uname_string();
 768     pa_log_debug(_("Running on host: %s"), s);
 769     pa_xfree(s);
 770
 771     pa_log_debug(_("Found %u CPUs."), pa_ncpus());
 772
 773     pa_log_info(_("Page size is %lu bytes"), (unsigned long) PA_PAGE_SIZE);
 774
 775 #ifdef HAVE_VALGRIND_MEMCHECK_H
 776     pa_log_debug(_("Compiled with Valgrind support: yes"));
 777 #else
 778     pa_log_debug(_("Compiled with Valgrind support: no"));
 779 #endif
 780
 781     pa_log_debug(_("Running in valgrind mode: %s"), pa_yes_no(pa_in_valgrind()));
 782
 783     pa_log_debug(_("Running in VM: %s"), pa_yes_no(pa_running_in_vm()));
 784
 785 #ifdef __OPTIMIZE__
 786     pa_log_debug(_("Optimized build: yes"));
 787 #else
 788     pa_log_debug(_("Optimized build: no"));
 789 #endif
 790
 791 #ifdef NDEBUG
 792     pa_log_debug(_("NDEBUG defined, all asserts disabled."));
 793 #elif defined(FASTPATH)
 794     pa_log_debug(_("FASTPATH defined, only fast path asserts disabled."));
 795 #else
 796     pa_log_debug(_("All asserts enabled."));
 797 #endif
 798
 799     if (!(s = pa_machine_id())) {
 800         pa_log(_("Failed to get machine ID"));
 801         goto finish;
 802     }
 803     pa_log_info(_("Machine ID is %s."), s);
 804     pa_xfree(s);
 805
 806     if ((s = pa_session_id())) {
 807         pa_log_info(_("Session ID is %s."), s);
 808         pa_xfree(s);
 809     }
 810
 811     if (!(s = pa_get_runtime_dir()))
 812         goto finish;
 813     pa_log_info(_("Using runtime directory %s."), s);
 814     pa_xfree(s);
 815
 816     if (!(s = pa_get_state_dir()))
 817         goto finish;
 818     pa_log_info(_("Using state directory %s."), s);
 819     pa_xfree(s);
 820
 821     pa_log_info(_("Using modules directory %s."), conf->dl_search_path);
 822
 823     pa_log_info(_("Running in system mode: %s"), pa_yes_no(pa_in_system_mode()));
 824
 825     if (pa_in_system_mode())
 826         pa_log_warn(_("OK, so you are running PA in system mode. Please note that you most likely shouldn't be doing that.\n"
 827                       "If you do it nonetheless then it's your own fault if things don't work as expected.\n"
 828                       "Please read http://pulseaudio.org/wiki/WhatIsWrongWithSystemMode for an explanation why system mode is usually a bad idea."));
 829
 830     if (conf->use_pid_file) {
 831         int z;
 832
 833         if ((z = pa_pid_file_create("pulseaudio")) != 0) {
 834
 835             if (conf->cmd == PA_CMD_START && z > 0) {
 836                 /* If we are already running and with are run in
 837                  * --start mode, then let's return this as success. */
 838
 839                 retval = 0;
 840                 goto finish;
 841             }
 842
 843             pa_log(_("pa_pid_file_create() failed."));
 844             goto finish;
 845         }
 846
 847         valid_pid_file = TRUE;
 848     }
 849
 850     pa_disable_sigpipe();
 851
 852     if (pa_rtclock_hrtimer())
 853         pa_log_info(_("Fresh high-resolution timers available! Bon appetit!"));
 854     else
 855         pa_log_info(_("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!"));
 856
 857     if (conf->lock_memory) {
 858 #ifdef HAVE_SYS_MMAN_H
 859         if (mlockall(MCL_FUTURE) < 0)
 860             pa_log_warn("mlockall() failed: %s", pa_cstrerror(errno));
 861         else
 862             pa_log_info("Sucessfully locked process into memory.");
 863 #else
 864         pa_log_warn("Memory locking requested but not supported on platform.");
 865 #endif
 866     }
 867
 868     pa_memtrap_install();
 869
 870     if (!getenv("PULSE_NO_SIMD")) {
 871         pa_cpu_init_x86();
 872         pa_cpu_init_arm();
 873     }
 874
 875     pa_assert_se(mainloop = pa_mainloop_new());
 876
 877     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm, conf->shm_size))) {
 878         pa_log(_("pa_core_new() failed."));
 879         goto finish;
 880     }
 881
 882     c->default_sample_spec = conf->default_sample_spec;
 883     c->default_channel_map = conf->default_channel_map;
 884     c->default_n_fragments = conf->default_n_fragments;
 885     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 886     c->exit_idle_time = conf->exit_idle_time;
 887     c->scache_idle_time = conf->scache_idle_time;
 888     c->resample_method = conf->resample_method;
 889     c->realtime_priority = conf->realtime_priority;
 890     c->realtime_scheduling = !!conf->realtime_scheduling;
 891     c->disable_remixing = !!conf->disable_remixing;
 892     c->disable_lfe_remixing = !!conf->disable_lfe_remixing;
 893     c->running_as_daemon = !!conf->daemonize;
 894     c->disallow_exit = conf->disallow_exit;
 895     c->flat_volumes = conf->flat_volumes;
 896 #ifdef HAVE_DBUS
 897     c->server_type = conf->local_server_type;
 898 #endif
 899
 900     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 901     pa_signal_new(SIGINT, signal_callback, c);
 902     pa_signal_new(SIGTERM, signal_callback, c);
 903 #ifdef SIGUSR1
 904     pa_signal_new(SIGUSR1, signal_callback, c);
 905 #endif
 906 #ifdef SIGUSR2
 907     pa_signal_new(SIGUSR2, signal_callback, c);
 908 #endif
 909 #ifdef SIGHUP
 910     pa_signal_new(SIGHUP, signal_callback, c);
 911 #endif
 912
 913 #ifdef OS_IS_WIN32
 914     win32_timer = pa_mainloop_get_api(mainloop)->rtclock_time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL);
 915 #endif
 916
 917     if (!conf->no_cpu_limit)
 918         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 919
 920     buf = pa_strbuf_new();
 921
 922 #ifdef HAVE_DBUS
 923     if (start_server) {
 924 #endif
 925         if (conf->load_default_script_file) {
 926             FILE *f;
 927
 928             if ((f = pa_daemon_conf_open_default_script_file(conf))) {
 929                 r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
 930                 fclose(f);
 931             }
 932         }
 933
 934         if (r >= 0)
 935             r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 936
 937         pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 938         pa_xfree(s);
 939
 940         if (r < 0 && conf->fail) {
 941             pa_log(_("Failed to initialize daemon."));
 942             goto finish;
 943         }
 944
 945         if (!c->modules || pa_idxset_size(c->modules) == 0) {
 946             pa_log(_("Daemon startup without any loaded modules, refusing to work."));
 947             goto finish;
 948         }
 949 #ifdef HAVE_DBUS
 950     } else {
 951         /* When we just provide the D-Bus server lookup service, we don't want
 952          * any modules to be loaded. We haven't loaded any so far, so one might
 953          * think there's no way to contact the server, but receiving certain
 954          * signals could still cause modules to load. */
 955         conf->disallow_module_loading = TRUE;
 956     }
 957 #endif
 958
 959     /* We completed the initial module loading, so let's disable it
 960      * from now on, if requested */
 961     c->disallow_module_loading = !!conf->disallow_module_loading;
 962
 963 #ifdef HAVE_FORK
 964     if (daemon_pipe[1] >= 0) {
 965         int ok = 0;
 966         pa_loop_write(daemon_pipe[1], &ok, sizeof(ok), NULL);
 967         pa_close(daemon_pipe[1]);
 968         daemon_pipe[1] = -1;
 969     }
 970 #endif
 971
 972 #ifdef HAVE_DBUS
 973     if (!conf->system_instance) {
 974         if (!(server_lookup = pa_dbusobj_server_lookup_new(c)))
 975             goto finish;
 976         if (!(lookup_service_bus = register_dbus_name(c, DBUS_BUS_SESSION, "org.PulseAudio1")))
 977             goto finish;
 978     }
 979
 980     if (start_server && !(server_bus = register_dbus_name(c, conf->system_instance ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, "org.pulseaudio.Server")))
 981         goto finish;
 982 #endif
 983
 984     pa_log_info(_("Daemon startup complete."));
 985
 986     retval = 0;
 987     if (pa_mainloop_run(mainloop, &retval) < 0)
 988         goto finish;
 989
 990     pa_log_info(_("Daemon shutdown initiated."));
 991
 992 finish:
 993 #ifdef HAVE_DBUS
 994     if (server_bus)
 995         pa_dbus_connection_unref(server_bus);
 996     if (lookup_service_bus)
 997         pa_dbus_connection_unref(lookup_service_bus);
 998     if (server_lookup)
 999         pa_dbusobj_server_lookup_free(server_lookup);
1000 #endif
1001
1002     if (autospawn_fd >= 0) {
1003         if (autospawn_locked)
1004             pa_autospawn_lock_release();
1005
1006         pa_autospawn_lock_done(FALSE);
1007     }
1008
1009 #ifdef OS_IS_WIN32
1010     if (win32_timer)
1011         pa_mainloop_get_api(mainloop)->time_free(win32_timer);
1012 #endif
1013
1014     if (c) {
1015         pa_core_unref(c);
1016         pa_log_info(_("Daemon terminated."));
1017     }
1018
1019     if (!conf->no_cpu_limit)
1020         pa_cpu_limit_done();
1021
1022     pa_signal_done();
1023
1024 #ifdef HAVE_FORK
1025     if (daemon_pipe[1] >= 0)
1026         pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
1027
1028     pa_close_pipe(daemon_pipe);
1029 #endif
1030
1031     if (mainloop)
1032         pa_mainloop_free(mainloop);
1033
1034     if (conf)
1035         pa_daemon_conf_free(conf);
1036
1037     if (valid_pid_file)
1038         pa_pid_file_remove();
1039
1040     /* This has no real purpose except making things valgrind-clean */
1041     pa_unset_env_recorded();
1042
1043 #ifdef OS_IS_WIN32
1044     WSACleanup();
1045 #endif
1046
1047     if (ltdl_init)
1048         pa_ltdl_done();
1049
1050 #ifdef HAVE_DBUS
1051     dbus_shutdown();
1052 #endif
1053
1054     return retval;
1055 }