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 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
  41 #include <liboil/liboil.h>
  42
  43 #ifdef HAVE_SYS_IOCTL_H
  44 #include <sys/ioctl.h>
  45 #endif
  46
  47 #ifdef HAVE_PWD_H
  48 #include <pwd.h>
  49 #endif
  50 #ifdef HAVE_GRP_H
  51 #include <grp.h>
  52 #endif
  53
  54 #ifdef HAVE_LIBWRAP
  55 #include <syslog.h>
  56 #include <tcpd.h>
  57 #endif
  58
  59 #ifdef HAVE_DBUS
  60 #include <dbus/dbus.h>
  61 #endif
  62
  63 #include <pulse/mainloop.h>
  64 #include <pulse/mainloop-signal.h>
  65 #include <pulse/timeval.h>
  66 #include <pulse/xmalloc.h>
  67 #include <pulse/i18n.h>
  68
  69 #include <pulsecore/lock-autospawn.h>
  70 #include <pulsecore/winsock.h>
  71 #include <pulsecore/core-error.h>
  72 #include <pulsecore/core.h>
  73 #include <pulsecore/memblock.h>
  74 #include <pulsecore/module.h>
  75 #include <pulsecore/cli-command.h>
  76 #include <pulsecore/log.h>
  77 #include <pulsecore/core-util.h>
  78 #include <pulsecore/sioman.h>
  79 #include <pulsecore/cli-text.h>
  80 #include <pulsecore/pid.h>
  81 #include <pulsecore/namereg.h>
  82 #include <pulsecore/random.h>
  83 #include <pulsecore/rtsig.h>
  84 #include <pulsecore/rtclock.h>
  85 #include <pulsecore/macro.h>
  86 #include <pulsecore/mutex.h>
  87 #include <pulsecore/thread.h>
  88 #include <pulsecore/once.h>
  89 #include <pulsecore/shm.h>
  90
  91 #include "cmdline.h"
  92 #include "cpulimit.h"
  93 #include "daemon-conf.h"
  94 #include "dumpmodules.h"
  95 #include "caps.h"
  96 #include "ltdl-bind-now.h"
  97 #include "polkit.h"
  98
  99 #ifdef HAVE_LIBWRAP
 100 /* Only one instance of these variables */
 101 int allow_severity = LOG_INFO;
 102 int deny_severity = LOG_WARNING;
 103 #endif
 104
 105 #ifdef HAVE_OSS
 106 /* padsp looks for this symbol in the running process and disables
 107  * itself if it finds it and it is set to 7 (which is actually a bit
 108  * mask). For details see padsp. */
 109 int __padsp_disabled__ = 7;
 110 #endif
 111
 112 #ifdef OS_IS_WIN32
 113
 114 static void message_cb(pa_mainloop_api*a, pa_time_event*e, const struct timeval *tv, void *userdata) {
 115     MSG msg;
 116     struct timeval tvnext;
 117
 118     while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 119         if (msg.message == WM_QUIT)
 120             raise(SIGTERM);
 121         else {
 122             TranslateMessage(&msg);
 123             DispatchMessage(&msg);
 124         }
 125     }
 126
 127     pa_timeval_add(pa_gettimeofday(&tvnext), 100000);
 128     a->time_restart(e, &tvnext);
 129 }
 130
 131 #endif
 132
 133 static void signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 134     pa_log_info(_("Got signal %s."), pa_sig2str(sig));
 135
 136     switch (sig) {
 137 #ifdef SIGUSR1
 138         case SIGUSR1:
 139             pa_module_load(userdata, "module-cli", NULL);
 140             break;
 141 #endif
 142
 143 #ifdef SIGUSR2
 144         case SIGUSR2:
 145             pa_module_load(userdata, "module-cli-protocol-unix", NULL);
 146             break;
 147 #endif
 148
 149 #ifdef SIGHUP
 150         case SIGHUP: {
 151             char *c = pa_full_status_string(userdata);
 152             pa_log_notice("%s", c);
 153             pa_xfree(c);
 154             return;
 155         }
 156 #endif
 157
 158         case SIGINT:
 159         case SIGTERM:
 160         default:
 161             pa_log_info(_("Exiting."));
 162             m->quit(m, 1);
 163             break;
 164     }
 165 }
 166
 167 #if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
 168
 169 static int change_user(void) {
 170     struct passwd *pw;
 171     struct group * gr;
 172     int r;
 173
 174     /* This function is called only in system-wide mode. It creates a
 175      * runtime dir in /var/run/ with proper UID/GID and drops privs
 176      * afterwards. */
 177
 178     if (!(pw = getpwnam(PA_SYSTEM_USER))) {
 179         pa_log(_("Failed to find user '%s'."), PA_SYSTEM_USER);
 180         return -1;
 181     }
 182
 183     if (!(gr = getgrnam(PA_SYSTEM_GROUP))) {
 184         pa_log(_("Failed to find group '%s'."), PA_SYSTEM_GROUP);
 185         return -1;
 186     }
 187
 188     pa_log_info(_("Found user '%s' (UID %lu) and group '%s' (GID %lu)."),
 189                 PA_SYSTEM_USER, (unsigned long) pw->pw_uid,
 190                 PA_SYSTEM_GROUP, (unsigned long) gr->gr_gid);
 191
 192     if (pw->pw_gid != gr->gr_gid) {
 193         pa_log(_("GID of user '%s' and of group '%s' don't match."), PA_SYSTEM_USER, PA_SYSTEM_GROUP);
 194         return -1;
 195     }
 196
 197     if (strcmp(pw->pw_dir, PA_SYSTEM_RUNTIME_PATH) != 0)
 198         pa_log_warn(_("Home directory of user '%s' is not '%s', ignoring."), PA_SYSTEM_USER, PA_SYSTEM_RUNTIME_PATH);
 199
 200     if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH, 0755, pw->pw_uid, gr->gr_gid) < 0) {
 201         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_RUNTIME_PATH, pa_cstrerror(errno));
 202         return -1;
 203     }
 204
 205     if (pa_make_secure_dir(PA_SYSTEM_STATE_PATH, 0700, pw->pw_uid, gr->gr_gid) < 0) {
 206         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_STATE_PATH, pa_cstrerror(errno));
 207         return -1;
 208     }
 209
 210     /* We don't create the config dir here, because we don't need to write to it */
 211
 212     if (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
 213         pa_log(_("Failed to change group list: %s"), pa_cstrerror(errno));
 214         return -1;
 215     }
 216
 217 #if defined(HAVE_SETRESGID)
 218     r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
 219 #elif defined(HAVE_SETEGID)
 220     if ((r = setgid(gr->gr_gid)) >= 0)
 221         r = setegid(gr->gr_gid);
 222 #elif defined(HAVE_SETREGID)
 223     r = setregid(gr->gr_gid, gr->gr_gid);
 224 #else
 225 #error "No API to drop privileges"
 226 #endif
 227
 228     if (r < 0) {
 229         pa_log(_("Failed to change GID: %s"), pa_cstrerror(errno));
 230         return -1;
 231     }
 232
 233 #if defined(HAVE_SETRESUID)
 234     r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
 235 #elif defined(HAVE_SETEUID)
 236     if ((r = setuid(pw->pw_uid)) >= 0)
 237         r = seteuid(pw->pw_uid);
 238 #elif defined(HAVE_SETREUID)
 239     r = setreuid(pw->pw_uid, pw->pw_uid);
 240 #else
 241 #error "No API to drop privileges"
 242 #endif
 243
 244     if (r < 0) {
 245         pa_log(_("Failed to change UID: %s"), pa_cstrerror(errno));
 246         return -1;
 247     }
 248
 249     pa_set_env("USER", PA_SYSTEM_USER);
 250     pa_set_env("USERNAME", PA_SYSTEM_USER);
 251     pa_set_env("LOGNAME", PA_SYSTEM_USER);
 252     pa_set_env("HOME", PA_SYSTEM_RUNTIME_PATH);
 253
 254     /* Relevant for pa_runtime_path() */
 255     pa_set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
 256     pa_set_env("PULSE_CONFIG_PATH", PA_SYSTEM_CONFIG_PATH);
 257     pa_set_env("PULSE_STATE_PATH", PA_SYSTEM_STATE_PATH);
 258
 259     pa_log_info(_("Successfully dropped root privileges."));
 260
 261     return 0;
 262 }
 263
 264 #else /* HAVE_PWD_H && HAVE_GRP_H */
 265
 266 static int change_user(void) {
 267     pa_log(_("System wide mode unsupported on this platform."));
 268     return -1;
 269 }
 270
 271 #endif /* HAVE_PWD_H && HAVE_GRP_H */
 272
 273 #ifdef HAVE_SYS_RESOURCE_H
 274
 275 static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
 276     struct rlimit rl;
 277     pa_assert(r);
 278
 279     if (!r->is_set)
 280         return 0;
 281
 282     rl.rlim_cur = rl.rlim_max = r->value;
 283
 284     if (setrlimit(resource, &rl) < 0) {
 285         pa_log_info(_("setrlimit(%s, (%u, %u)) failed: %s"), name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
 286         return -1;
 287     }
 288
 289     return 0;
 290 }
 291
 292 static void set_all_rlimits(const pa_daemon_conf *conf) {
 293     set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
 294     set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
 295     set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
 296     set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
 297     set_one_rlimit(&conf->rlimit_rss, RLIMIT_RSS, "RLIMIT_RSS");
 298 #ifdef RLIMIT_NPROC
 299     set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
 300 #endif
 301     set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
 302 #ifdef RLIMIT_MEMLOCK
 303     set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
 304 #endif
 305     set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
 306 #ifdef RLIMIT_LOCKS
 307     set_one_rlimit(&conf->rlimit_locks, RLIMIT_LOCKS, "RLIMIT_LOCKS");
 308 #endif
 309 #ifdef RLIMIT_SIGPENDING
 310     set_one_rlimit(&conf->rlimit_sigpending, RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING");
 311 #endif
 312 #ifdef RLIMIT_MSGQUEUE
 313     set_one_rlimit(&conf->rlimit_msgqueue, RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE");
 314 #endif
 315 #ifdef RLIMIT_NICE
 316     set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
 317 #endif
 318 #ifdef RLIMIT_RTPRIO
 319     set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
 320 #endif
 321 #ifdef RLIMIT_RTTIME
 322     set_one_rlimit(&conf->rlimit_rttime, RLIMIT_RTTIME, "RLIMIT_RTTIME");
 323 #endif
 324 }
 325 #endif
 326
 327 int main(int argc, char *argv[]) {
 328     pa_core *c = NULL;
 329     pa_strbuf *buf = NULL;
 330     pa_daemon_conf *conf = NULL;
 331     pa_mainloop *mainloop = NULL;
 332     char *s;
 333     int r = 0, retval = 1, d = 0;
 334     pa_bool_t suid_root, real_root;
 335     pa_bool_t valid_pid_file = FALSE;
 336     gid_t gid = (gid_t) -1;
 337     pa_bool_t ltdl_init = FALSE;
 338     int passed_fd = -1;
 339     const char *e;
 340 #ifdef HAVE_FORK
 341     int daemon_pipe[2] = { -1, -1 };
 342 #endif
 343 #ifdef OS_IS_WIN32
 344     pa_time_event *win32_timer;
 345     struct timeval win32_tv;
 346 #endif
 347     char *lf = NULL;
 348     int autospawn_fd = -1;
 349     pa_bool_t autospawn_locked = FALSE;
 350
 351     pa_log_set_maximal_level(PA_LOG_INFO);
 352     pa_log_set_ident("pulseaudio");
 353
 354 #if defined(__linux__) && defined(__OPTIMIZE__)
 355     /*
 356        Disable lazy relocations to make usage of external libraries
 357        more deterministic for our RT threads. We abuse __OPTIMIZE__ as
 358        a check whether we are a debug build or not.
 359     */
 360
 361     if (!getenv("LD_BIND_NOW")) {
 362         char *rp;
 363
 364         /* We have to execute ourselves, because the libc caches the
 365          * value of $LD_BIND_NOW on initialization. */
 366
 367         pa_set_env("LD_BIND_NOW", "1");
 368         pa_assert_se(rp = pa_readlink("/proc/self/exe"));
 369         pa_assert_se(execv(rp, argv) == 0);
 370     }
 371 #endif
 372
 373 #ifdef HAVE_GETUID
 374     real_root = getuid() == 0;
 375     suid_root = !real_root && geteuid() == 0;
 376 #else
 377     real_root = FALSE;
 378     suid_root = FALSE;
 379 #endif
 380
 381     if (!real_root) {
 382         /* Drop all capabilities except CAP_SYS_NICE  */
 383         pa_limit_caps();
 384
 385         /* Drop privileges, but keep CAP_SYS_NICE */
 386         pa_drop_root();
 387
 388         /* After dropping root, the effective set is reset, hence,
 389          * let's raise it again */
 390         pa_limit_caps();
 391
 392         /* When capabilities are not supported we will not be able to
 393          * aquire RT sched anymore. But yes, that's the way it is. It
 394          * is just too risky tun let PA run as root all the time. */
 395     }
 396
 397     if ((e = getenv("PULSE_PASSED_FD"))) {
 398         passed_fd = atoi(e);
 399
 400         if (passed_fd <= 2)
 401             passed_fd = -1;
 402     }
 403
 404     pa_close_all(passed_fd, -1);
 405
 406     pa_reset_sigs(-1);
 407     pa_unblock_sigs(-1);
 408
 409     /* At this point, we are a normal user, possibly with CAP_NICE if
 410      * we were started SUID. If we are started as normal root, than we
 411      * still are normal root. */
 412
 413     setlocale(LC_ALL, "");
 414     pa_init_i18n();
 415
 416     conf = pa_daemon_conf_new();
 417
 418     if (pa_daemon_conf_load(conf, NULL) < 0)
 419         goto finish;
 420
 421     if (pa_daemon_conf_env(conf) < 0)
 422         goto finish;
 423
 424     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 425         pa_log(_("Failed to parse command line."));
 426         goto finish;
 427     }
 428
 429     pa_log_set_maximal_level(conf->log_level);
 430     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);
 431     pa_log_set_show_meta(conf->log_meta);
 432     pa_log_set_show_backtrace(conf->log_backtrace);
 433     pa_log_set_show_time(conf->log_time);
 434
 435     pa_log_debug("Started as real root: %s, suid root: %s", pa_yes_no(real_root), pa_yes_no(suid_root));
 436
 437     if (!real_root && pa_have_caps()) {
 438 #ifdef HAVE_SYS_RESOURCE_H
 439         struct rlimit rl;
 440 #endif
 441         pa_bool_t allow_high_priority = FALSE, allow_realtime = FALSE;
 442
 443         /* Let's better not enable high prio or RT by default */
 444
 445         if (conf->high_priority && !allow_high_priority) {
 446             if (pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) {
 447                 pa_log_info(_("We're in the group '%s', allowing high-priority scheduling."), PA_REALTIME_GROUP);
 448                 allow_high_priority = TRUE;
 449             }
 450         }
 451
 452         if (conf->realtime_scheduling && !allow_realtime) {
 453             if (pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) {
 454                 pa_log_info(_("We're in the group '%s', allowing real-time scheduling."), PA_REALTIME_GROUP);
 455                 allow_realtime = TRUE;
 456             }
 457         }
 458
 459 #ifdef HAVE_POLKIT
 460         if (conf->high_priority && !allow_high_priority) {
 461             if (pa_polkit_check("org.pulseaudio.acquire-high-priority") > 0) {
 462                 pa_log_info(_("PolicyKit grants us acquire-high-priority privilege."));
 463                 allow_high_priority = TRUE;
 464             } else
 465                 pa_log_info(_("PolicyKit refuses acquire-high-priority privilege."));
 466         }
 467
 468         if (conf->realtime_scheduling && !allow_realtime) {
 469             if (pa_polkit_check("org.pulseaudio.acquire-real-time") > 0) {
 470                 pa_log_info(_("PolicyKit grants us acquire-real-time privilege."));
 471                 allow_realtime = TRUE;
 472             } else
 473                 pa_log_info(_("PolicyKit refuses acquire-real-time privilege."));
 474         }
 475 #endif
 476
 477         if (!allow_high_priority && !allow_realtime) {
 478
 479             /* OK, there's no further need to keep CAP_NICE. Hence
 480              * let's give it up early */
 481
 482             pa_drop_caps();
 483         }
 484
 485 #ifdef RLIMIT_RTPRIO
 486         if (getrlimit(RLIMIT_RTPRIO, &rl) >= 0)
 487             if (rl.rlim_cur > 0) {
 488                 pa_log_info("RLIMIT_RTPRIO is set to %u, allowing real-time scheduling.", (unsigned) rl.rlim_cur);
 489                 allow_realtime = TRUE;
 490             }
 491 #endif
 492 #ifdef RLIMIT_NICE
 493         if (getrlimit(RLIMIT_NICE, &rl) >= 0)
 494             if (rl.rlim_cur > 20 ) {
 495                 pa_log_info("RLIMIT_NICE is set to %u, allowing high-priority scheduling.", (unsigned) rl.rlim_cur);
 496                 allow_high_priority = TRUE;
 497             }
 498 #endif
 499
 500         if ((conf->high_priority && !allow_high_priority) ||
 501             (conf->realtime_scheduling && !allow_realtime))
 502             pa_log_notice(_("Called SUID root and real-time and/or high-priority scheduling was requested in the configuration. However, we lack the necessary privileges:\n"
 503                             "We are not in group '"PA_REALTIME_GROUP"', PolicyKit refuse to grant us the requested privileges and we have no increase RLIMIT_NICE/RLIMIT_RTPRIO resource limits.\n"
 504                             "For enabling real-time/high-priority scheduling please acquire the appropriate PolicyKit privileges, or become a member of '"PA_REALTIME_GROUP"', or increase the RLIMIT_NICE/RLIMIT_RTPRIO resource limits for this user."));
 505
 506
 507         if (!allow_realtime)
 508             conf->realtime_scheduling = FALSE;
 509
 510         if (!allow_high_priority)
 511             conf->high_priority = FALSE;
 512     }
 513
 514 #ifdef HAVE_SYS_RESOURCE_H
 515     /* Reset resource limits. If we are run as root (for system mode)
 516      * this might end up increasing the limits, which is intended
 517      * behaviour. For all other cases, i.e. started as normal user, or
 518      * SUID root at this point we should have no CAP_SYS_RESOURCE and
 519      * increasing the limits thus should fail. Which is, too, intended
 520      * behaviour */
 521
 522     set_all_rlimits(conf);
 523 #endif
 524
 525     if (conf->high_priority && !pa_can_high_priority()) {
 526         pa_log_warn(_("High-priority scheduling enabled in configuration but not allowed by policy."));
 527         conf->high_priority = FALSE;
 528     }
 529
 530     if (conf->high_priority && (conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START))
 531         pa_raise_priority(conf->nice_level);
 532
 533     pa_log_debug("Can realtime: %s, can high-priority: %s", pa_yes_no(pa_can_realtime()), pa_yes_no(pa_can_high_priority()));
 534
 535     if (!real_root && pa_have_caps()) {
 536         pa_bool_t drop;
 537
 538         drop = (conf->cmd != PA_CMD_DAEMON && conf->cmd != PA_CMD_START) || !conf->realtime_scheduling;
 539
 540 #ifdef RLIMIT_RTPRIO
 541         if (!drop) {
 542             struct rlimit rl;
 543             /* At this point we still have CAP_NICE if we were loaded
 544              * SUID root. If possible let's acquire RLIMIT_RTPRIO
 545              * instead and give CAP_NICE up. */
 546
 547             if (getrlimit(RLIMIT_RTPRIO, &rl) >= 0) {
 548
 549                 if (rl.rlim_cur >= 9)
 550                     drop = TRUE;
 551                 else {
 552                     rl.rlim_max = rl.rlim_cur = 9;
 553
 554                     if (setrlimit(RLIMIT_RTPRIO, &rl) >= 0) {
 555                         pa_log_info(_("Successfully increased RLIMIT_RTPRIO"));
 556                         drop = TRUE;
 557                     } else
 558                         pa_log_warn(_("RLIMIT_RTPRIO failed: %s"), pa_cstrerror(errno));
 559                 }
 560             }
 561         }
 562 #endif
 563
 564         if (drop)  {
 565             pa_log_info(_("Giving up CAP_NICE"));
 566             pa_drop_caps();
 567             suid_root = FALSE;
 568         }
 569     }
 570
 571     if (conf->realtime_scheduling && !pa_can_realtime()) {
 572         pa_log_warn(_("Real-time scheduling enabled in configuration but not allowed by policy."));
 573         conf->realtime_scheduling = FALSE;
 574     }
 575
 576     pa_log_debug("Can realtime: %s, can high-priority: %s", pa_yes_no(pa_can_realtime()), pa_yes_no(pa_can_high_priority()));
 577
 578     LTDL_SET_PRELOADED_SYMBOLS();
 579     pa_ltdl_init();
 580     ltdl_init = TRUE;
 581
 582     if (conf->dl_search_path)
 583         lt_dlsetsearchpath(conf->dl_search_path);
 584
 585 #ifdef OS_IS_WIN32
 586     {
 587         WSADATA data;
 588         WSAStartup(MAKEWORD(2, 0), &data);
 589     }
 590 #endif
 591
 592     pa_random_seed();
 593
 594     switch (conf->cmd) {
 595         case PA_CMD_DUMP_MODULES:
 596             pa_dump_modules(conf, argc-d, argv+d);
 597             retval = 0;
 598             goto finish;
 599
 600         case PA_CMD_DUMP_CONF: {
 601             s = pa_daemon_conf_dump(conf);
 602             fputs(s, stdout);
 603             pa_xfree(s);
 604             retval = 0;
 605             goto finish;
 606         }
 607
 608         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 609             int i;
 610
 611             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 612                 if (pa_resample_method_supported(i))
 613                     printf("%s\n", pa_resample_method_to_string(i));
 614
 615             retval = 0;
 616             goto finish;
 617         }
 618
 619         case PA_CMD_HELP :
 620             pa_cmdline_help(argv[0]);
 621             retval = 0;
 622             goto finish;
 623
 624         case PA_CMD_VERSION :
 625             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 626             retval = 0;
 627             goto finish;
 628
 629         case PA_CMD_CHECK: {
 630             pid_t pid;
 631
 632             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 633                 pa_log_info(_("Daemon not running"));
 634             else {
 635                 pa_log_info(_("Daemon running as PID %u"), pid);
 636                 retval = 0;
 637             }
 638
 639             goto finish;
 640
 641         }
 642         case PA_CMD_KILL:
 643
 644             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 645                 pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno));
 646             else
 647                 retval = 0;
 648
 649             goto finish;
 650
 651         case PA_CMD_CLEANUP_SHM:
 652
 653             if (pa_shm_cleanup() >= 0)
 654                 retval = 0;
 655
 656             goto finish;
 657
 658         default:
 659             pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START);
 660     }
 661
 662     if (real_root && !conf->system_instance)
 663         pa_log_warn(_("This program is not intended to be run as root (unless --system is specified)."));
 664     else if (!real_root && conf->system_instance) {
 665         pa_log(_("Root privileges required."));
 666         goto finish;
 667     }
 668
 669     if (conf->cmd == PA_CMD_START && conf->system_instance) {
 670         pa_log(_("--start not supported for system instances."));
 671         goto finish;
 672     }
 673
 674     if (conf->system_instance && !conf->disallow_exit)
 675         pa_log_warn(_("Running in system mode, but --disallow-exit not set!"));
 676
 677     if (conf->system_instance && !conf->disallow_module_loading)
 678         pa_log_warn(_("Running in system mode, but --disallow-module-loading not set!"));
 679
 680     if (conf->system_instance && !conf->disable_shm) {
 681         pa_log_notice(_("Running in system mode, forcibly disabling SHM mode!"));
 682         conf->disable_shm = TRUE;
 683     }
 684
 685     if (conf->system_instance && conf->exit_idle_time >= 0) {
 686         pa_log_notice(_("Running in system mode, forcibly disabling exit idle time!"));
 687         conf->exit_idle_time = -1;
 688     }
 689
 690     if (conf->cmd == PA_CMD_START) {
 691         /* If we shall start PA only when it is not running yet, we
 692          * first take the autospawn lock to make things
 693          * synchronous. */
 694
 695         if ((autospawn_fd = pa_autospawn_lock_init()) < 0) {
 696             pa_log("Failed to initialize autospawn lock");
 697             goto finish;
 698         }
 699
 700         if ((pa_autospawn_lock_acquire(TRUE) < 0)) {
 701             pa_log("Failed to acquire autospawn lock");
 702             goto finish;
 703         }
 704
 705         autospawn_locked = TRUE;
 706     }
 707
 708     if (conf->daemonize) {
 709         pid_t child;
 710         int tty_fd;
 711
 712         if (pa_stdio_acquire() < 0) {
 713             pa_log(_("Failed to acquire stdio."));
 714             goto finish;
 715         }
 716
 717 #ifdef HAVE_FORK
 718         if (pipe(daemon_pipe) < 0) {
 719             pa_log(_("pipe failed: %s"), pa_cstrerror(errno));
 720             goto finish;
 721         }
 722
 723         if ((child = fork()) < 0) {
 724             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 725             goto finish;
 726         }
 727
 728         if (child != 0) {
 729             ssize_t n;
 730             /* Father */
 731
 732             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 733             daemon_pipe[1] = -1;
 734
 735             if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 736
 737                 if (n < 0)
 738                     pa_log(_("read() failed: %s"), pa_cstrerror(errno));
 739
 740                 retval = 1;
 741             }
 742
 743             if (retval)
 744                 pa_log(_("Daemon startup failed."));
 745             else
 746                 pa_log_info(_("Daemon startup successful."));
 747
 748             goto finish;
 749         }
 750
 751         if (autospawn_fd >= 0) {
 752             /* The lock file is unlocked from the parent, so we need
 753              * to close it in the child */
 754
 755             pa_autospawn_lock_release();
 756             pa_autospawn_lock_done(TRUE);
 757
 758             autospawn_locked = FALSE;
 759             autospawn_fd = -1;
 760         }
 761
 762         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 763         daemon_pipe[0] = -1;
 764 #endif
 765
 766         if (conf->auto_log_target)
 767             pa_log_set_target(PA_LOG_SYSLOG, NULL);
 768
 769 #ifdef HAVE_SETSID
 770         setsid();
 771 #endif
 772 #ifdef HAVE_SETPGID
 773         setpgid(0,0);
 774 #endif
 775
 776 #ifndef OS_IS_WIN32
 777         pa_close(0);
 778         pa_close(1);
 779         pa_close(2);
 780
 781         pa_assert_se(open("/dev/null", O_RDONLY) == 0);
 782         pa_assert_se(open("/dev/null", O_WRONLY) == 1);
 783         pa_assert_se(open("/dev/null", O_WRONLY) == 2);
 784 #else
 785         FreeConsole();
 786 #endif
 787
 788 #ifdef SIGTTOU
 789         signal(SIGTTOU, SIG_IGN);
 790 #endif
 791 #ifdef SIGTTIN
 792         signal(SIGTTIN, SIG_IGN);
 793 #endif
 794 #ifdef SIGTSTP
 795         signal(SIGTSTP, SIG_IGN);
 796 #endif
 797
 798 #ifdef TIOCNOTTY
 799         if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
 800             ioctl(tty_fd, TIOCNOTTY, (char*) 0);
 801             pa_assert_se(pa_close(tty_fd) == 0);
 802         }
 803 #endif
 804     }
 805
 806     pa_set_env("PULSE_INTERNAL", "1");
 807     pa_assert_se(chdir("/") == 0);
 808     umask(0022);
 809
 810     if (conf->system_instance)
 811         if (change_user() < 0)
 812             goto finish;
 813
 814     pa_set_env("PULSE_SYSTEM", conf->system_instance ? "1" : "0");
 815
 816     pa_log_info(_("This is PulseAudio %s"), PACKAGE_VERSION);
 817     pa_log_debug(_("Compilation host: %s"), CANONICAL_HOST);
 818     pa_log_debug(_("Compilation CFLAGS: %s"), PA_CFLAGS);
 819
 820     s = pa_uname_string();
 821     pa_log_debug(_("Running on host: %s"), s);
 822     pa_xfree(s);
 823
 824     pa_log_info(_("Page size is %lu bytes"), (unsigned long) PA_PAGE_SIZE);
 825
 826 #ifdef HAVE_VALGRIND_MEMCHECK_H
 827     pa_log_debug(_("Compiled with Valgrind support: yes"));
 828 #else
 829     pa_log_debug(_("Compiled with Valgrind support: no"));
 830 #endif
 831
 832     pa_log_debug(_("Running in valgrind mode: %s"), pa_yes_no(pa_in_valgrind()));
 833
 834 #ifdef __OPTIMIZE__
 835     pa_log_debug(_("Optimized build: yes"));
 836 #else
 837     pa_log_debug(_("Optimized build: no"));
 838 #endif
 839
 840     if (!(s = pa_machine_id())) {
 841         pa_log(_("Failed to get machine ID"));
 842         goto finish;
 843     }
 844     pa_log_info(_("Machine ID is %s."), s);
 845     pa_xfree(s);
 846
 847     if (!(s = pa_get_runtime_dir()))
 848         goto finish;
 849     pa_log_info(_("Using runtime directory %s."), s);
 850     pa_xfree(s);
 851
 852     if (!(s = pa_get_state_dir()))
 853         goto finish;
 854     pa_log_info(_("Using state directory %s."), s);
 855     pa_xfree(s);
 856
 857     pa_log_info(_("Running in system mode: %s"), pa_yes_no(pa_in_system_mode()));
 858
 859     if (conf->use_pid_file) {
 860         int z;
 861
 862         if ((z = pa_pid_file_create("pulseaudio")) != 0) {
 863
 864             if (conf->cmd == PA_CMD_START && z > 0) {
 865                 /* If we are already running and with are run in
 866                  * --start mode, then let's return this as success. */
 867
 868                 retval = 0;
 869                 goto finish;
 870             }
 871
 872             pa_log(_("pa_pid_file_create() failed."));
 873             goto finish;
 874         }
 875
 876         valid_pid_file = TRUE;
 877     }
 878
 879 #ifdef SIGPIPE
 880     signal(SIGPIPE, SIG_IGN);
 881 #endif
 882
 883     if (pa_rtclock_hrtimer())
 884         pa_log_info(_("Fresh high-resolution timers available! Bon appetit!"));
 885     else
 886         pa_log_info(_("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!"));
 887
 888 #ifdef SIGRTMIN
 889     /* Valgrind uses SIGRTMAX. To easy debugging we don't use it here */
 890     pa_rtsig_configure(SIGRTMIN, SIGRTMAX-1);
 891 #endif
 892
 893     pa_assert_se(mainloop = pa_mainloop_new());
 894
 895     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm, conf->shm_size))) {
 896         pa_log(_("pa_core_new() failed."));
 897         goto finish;
 898     }
 899
 900     c->default_sample_spec = conf->default_sample_spec;
 901     c->default_n_fragments = conf->default_n_fragments;
 902     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 903     c->exit_idle_time = conf->exit_idle_time;
 904     c->scache_idle_time = conf->scache_idle_time;
 905     c->resample_method = conf->resample_method;
 906     c->realtime_priority = conf->realtime_priority;
 907     c->realtime_scheduling = !!conf->realtime_scheduling;
 908     c->disable_remixing = !!conf->disable_remixing;
 909     c->disable_lfe_remixing = !!conf->disable_lfe_remixing;
 910     c->running_as_daemon = !!conf->daemonize;
 911     c->disallow_exit = conf->disallow_exit;
 912
 913     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 914     pa_signal_new(SIGINT, signal_callback, c);
 915     pa_signal_new(SIGTERM, signal_callback, c);
 916 #ifdef SIGUSR1
 917     pa_signal_new(SIGUSR1, signal_callback, c);
 918 #endif
 919 #ifdef SIGUSR2
 920     pa_signal_new(SIGUSR2, signal_callback, c);
 921 #endif
 922 #ifdef SIGHUP
 923     pa_signal_new(SIGHUP, signal_callback, c);
 924 #endif
 925
 926 #ifdef OS_IS_WIN32
 927     win32_timer = pa_mainloop_get_api(mainloop)->time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL);
 928 #endif
 929
 930     oil_init();
 931
 932     if (!conf->no_cpu_limit)
 933         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 934
 935     buf = pa_strbuf_new();
 936     if (conf->load_default_script_file) {
 937         FILE *f;
 938
 939         if ((f = pa_daemon_conf_open_default_script_file(conf))) {
 940             r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
 941             fclose(f);
 942         }
 943     }
 944
 945     if (r >= 0)
 946         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 947
 948     pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 949     pa_xfree(s);
 950
 951     /* We completed the initial module loading, so let's disable it
 952      * from now on, if requested */
 953     c->disallow_module_loading = !!conf->disallow_module_loading;
 954
 955     if (r < 0 && conf->fail) {
 956         pa_log(_("Failed to initialize daemon."));
 957         goto finish;
 958     }
 959
 960     if (!c->modules || pa_idxset_size(c->modules) == 0) {
 961         pa_log(_("Daemon startup without any loaded modules, refusing to work."));
 962         goto finish;
 963     }
 964
 965     if (c->default_sink_name && !pa_namereg_get(c, c->default_sink_name, PA_NAMEREG_SINK) && conf->fail) {
 966         pa_log_error(_("Default sink name (%s) does not exist in name register."), c->default_sink_name);
 967         goto finish;
 968     }
 969
 970 #ifdef HAVE_FORK
 971     if (daemon_pipe[1] >= 0) {
 972         int ok = 0;
 973         pa_loop_write(daemon_pipe[1], &ok, sizeof(ok), NULL);
 974         pa_close(daemon_pipe[1]);
 975         daemon_pipe[1] = -1;
 976     }
 977 #endif
 978
 979     pa_log_info(_("Daemon startup complete."));
 980
 981     retval = 0;
 982     if (pa_mainloop_run(mainloop, &retval) < 0)
 983         goto finish;
 984
 985     pa_log_info(_("Daemon shutdown initiated."));
 986
 987 finish:
 988
 989     if (autospawn_fd >= 0) {
 990         if (autospawn_locked)
 991             pa_autospawn_lock_release();
 992
 993         pa_autospawn_lock_done(FALSE);
 994     }
 995
 996     if (lf)
 997         pa_xfree(lf);
 998
 999 #ifdef OS_IS_WIN32
1000     if (win32_timer)
1001         pa_mainloop_get_api(mainloop)->time_free(win32_timer);
1002 #endif
1003
1004     if (c) {
1005         pa_core_unref(c);
1006         pa_log_info(_("Daemon terminated."));
1007     }
1008
1009     if (!conf->no_cpu_limit)
1010         pa_cpu_limit_done();
1011
1012     pa_signal_done();
1013
1014 #ifdef HAVE_FORK
1015     if (daemon_pipe[1] >= 0)
1016         pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
1017
1018     pa_close_pipe(daemon_pipe);
1019 #endif
1020
1021     if (mainloop)
1022         pa_mainloop_free(mainloop);
1023
1024     if (conf)
1025         pa_daemon_conf_free(conf);
1026
1027     if (valid_pid_file)
1028         pa_pid_file_remove();
1029
1030 #ifdef OS_IS_WIN32
1031     WSACleanup();
1032 #endif
1033
1034     if (ltdl_init)
1035         pa_ltdl_done();
1036
1037 #ifdef HAVE_DBUS
1038     dbus_shutdown();
1039 #endif
1040
1041     return retval;
1042 }