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 #ifdef RLIMIT_NOFILE
 302     set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
 303 #endif
 304 #ifdef RLIMIT_MEMLOCK
 305     set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
 306 #endif
 307 #ifdef RLIMIT_AS
 308     set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
 309 #endif
 310 #ifdef RLIMIT_LOCKS
 311     set_one_rlimit(&conf->rlimit_locks, RLIMIT_LOCKS, "RLIMIT_LOCKS");
 312 #endif
 313 #ifdef RLIMIT_SIGPENDING
 314     set_one_rlimit(&conf->rlimit_sigpending, RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING");
 315 #endif
 316 #ifdef RLIMIT_MSGQUEUE
 317     set_one_rlimit(&conf->rlimit_msgqueue, RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE");
 318 #endif
 319 #ifdef RLIMIT_NICE
 320     set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
 321 #endif
 322 #ifdef RLIMIT_RTPRIO
 323     set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
 324 #endif
 325 #ifdef RLIMIT_RTTIME
 326     set_one_rlimit(&conf->rlimit_rttime, RLIMIT_RTTIME, "RLIMIT_RTTIME");
 327 #endif
 328 }
 329 #endif
 330
 331 int main(int argc, char *argv[]) {
 332     pa_core *c = NULL;
 333     pa_strbuf *buf = NULL;
 334     pa_daemon_conf *conf = NULL;
 335     pa_mainloop *mainloop = NULL;
 336     char *s;
 337     int r = 0, retval = 1, d = 0;
 338     pa_bool_t suid_root, real_root;
 339     pa_bool_t valid_pid_file = FALSE;
 340     gid_t gid = (gid_t) -1;
 341     pa_bool_t ltdl_init = FALSE;
 342     int passed_fd = -1;
 343     const char *e;
 344 #ifdef HAVE_FORK
 345     int daemon_pipe[2] = { -1, -1 };
 346 #endif
 347 #ifdef OS_IS_WIN32
 348     pa_time_event *win32_timer;
 349     struct timeval win32_tv;
 350 #endif
 351     int autospawn_fd = -1;
 352     pa_bool_t autospawn_locked = FALSE;
 353
 354     pa_log_set_maximal_level(PA_LOG_INFO);
 355     pa_log_set_ident("pulseaudio");
 356
 357 #if defined(__linux__) && defined(__OPTIMIZE__)
 358     /*
 359        Disable lazy relocations to make usage of external libraries
 360        more deterministic for our RT threads. We abuse __OPTIMIZE__ as
 361        a check whether we are a debug build or not.
 362     */
 363
 364     if (!getenv("LD_BIND_NOW")) {
 365         char *rp;
 366
 367         /* We have to execute ourselves, because the libc caches the
 368          * value of $LD_BIND_NOW on initialization. */
 369
 370         pa_set_env("LD_BIND_NOW", "1");
 371
 372         if ((rp = pa_readlink("/proc/self/exe")))
 373             pa_assert_se(execv(rp, argv) == 0);
 374         else
 375             pa_log_warn("Couldn't read /proc/self/exe, cannot self execute. Running in a chroot()?");
 376     }
 377 #endif
 378
 379 #ifdef HAVE_GETUID
 380     real_root = getuid() == 0;
 381     suid_root = !real_root && geteuid() == 0;
 382 #else
 383     real_root = FALSE;
 384     suid_root = FALSE;
 385 #endif
 386
 387     if (!real_root) {
 388         /* Drop all capabilities except CAP_SYS_NICE  */
 389         pa_limit_caps();
 390
 391         /* Drop privileges, but keep CAP_SYS_NICE */
 392         pa_drop_root();
 393
 394         /* After dropping root, the effective set is reset, hence,
 395          * let's raise it again */
 396         pa_limit_caps();
 397
 398         /* When capabilities are not supported we will not be able to
 399          * aquire RT sched anymore. But yes, that's the way it is. It
 400          * is just too risky tun let PA run as root all the time. */
 401     }
 402
 403     if ((e = getenv("PULSE_PASSED_FD"))) {
 404         passed_fd = atoi(e);
 405
 406         if (passed_fd <= 2)
 407             passed_fd = -1;
 408     }
 409
 410     pa_close_all(passed_fd, -1);
 411
 412     pa_reset_sigs(-1);
 413     pa_unblock_sigs(-1);
 414
 415     /* At this point, we are a normal user, possibly with CAP_NICE if
 416      * we were started SUID. If we are started as normal root, than we
 417      * still are normal root. */
 418
 419     setlocale(LC_ALL, "");
 420     pa_init_i18n();
 421
 422     conf = pa_daemon_conf_new();
 423
 424     if (pa_daemon_conf_load(conf, NULL) < 0)
 425         goto finish;
 426
 427     if (pa_daemon_conf_env(conf) < 0)
 428         goto finish;
 429
 430     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 431         pa_log(_("Failed to parse command line."));
 432         goto finish;
 433     }
 434
 435     pa_log_set_maximal_level(conf->log_level);
 436     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);
 437     pa_log_set_show_meta(conf->log_meta);
 438     pa_log_set_show_backtrace(conf->log_backtrace);
 439     pa_log_set_show_time(conf->log_time);
 440
 441     pa_log_debug("Started as real root: %s, suid root: %s", pa_yes_no(real_root), pa_yes_no(suid_root));
 442
 443     if (!real_root && pa_have_caps()) {
 444 #ifdef HAVE_SYS_RESOURCE_H
 445         struct rlimit rl;
 446 #endif
 447         pa_bool_t allow_high_priority = FALSE, allow_realtime = FALSE;
 448
 449         /* Let's better not enable high prio or RT by default */
 450
 451         if (conf->high_priority && !allow_high_priority) {
 452             if (pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) {
 453                 pa_log_info(_("We're in the group '%s', allowing high-priority scheduling."), PA_REALTIME_GROUP);
 454                 allow_high_priority = TRUE;
 455             }
 456         }
 457
 458         if (conf->realtime_scheduling && !allow_realtime) {
 459             if (pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) {
 460                 pa_log_info(_("We're in the group '%s', allowing real-time scheduling."), PA_REALTIME_GROUP);
 461                 allow_realtime = TRUE;
 462             }
 463         }
 464
 465 #ifdef HAVE_POLKIT
 466         if (conf->high_priority && !allow_high_priority) {
 467             if (pa_polkit_check("org.pulseaudio.acquire-high-priority") > 0) {
 468                 pa_log_info(_("PolicyKit grants us acquire-high-priority privilege."));
 469                 allow_high_priority = TRUE;
 470             } else
 471                 pa_log_info(_("PolicyKit refuses acquire-high-priority privilege."));
 472         }
 473
 474         if (conf->realtime_scheduling && !allow_realtime) {
 475             if (pa_polkit_check("org.pulseaudio.acquire-real-time") > 0) {
 476                 pa_log_info(_("PolicyKit grants us acquire-real-time privilege."));
 477                 allow_realtime = TRUE;
 478             } else
 479                 pa_log_info(_("PolicyKit refuses acquire-real-time privilege."));
 480         }
 481 #endif
 482
 483         if (!allow_high_priority && !allow_realtime) {
 484
 485             /* OK, there's no further need to keep CAP_NICE. Hence
 486              * let's give it up early */
 487
 488             pa_drop_caps();
 489         }
 490
 491 #ifdef RLIMIT_RTPRIO
 492         if (getrlimit(RLIMIT_RTPRIO, &rl) >= 0)
 493             if (rl.rlim_cur > 0) {
 494                 pa_log_info("RLIMIT_RTPRIO is set to %u, allowing real-time scheduling.", (unsigned) rl.rlim_cur);
 495                 allow_realtime = TRUE;
 496             }
 497 #endif
 498 #ifdef RLIMIT_NICE
 499         if (getrlimit(RLIMIT_NICE, &rl) >= 0)
 500             if (rl.rlim_cur > 20 ) {
 501                 pa_log_info("RLIMIT_NICE is set to %u, allowing high-priority scheduling.", (unsigned) rl.rlim_cur);
 502                 allow_high_priority = TRUE;
 503             }
 504 #endif
 505
 506         if ((conf->high_priority && !allow_high_priority) ||
 507             (conf->realtime_scheduling && !allow_realtime))
 508             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"
 509                             "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"
 510                             "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."));
 511
 512
 513         if (!allow_realtime)
 514             conf->realtime_scheduling = FALSE;
 515
 516         if (!allow_high_priority)
 517             conf->high_priority = FALSE;
 518     }
 519
 520 #ifdef HAVE_SYS_RESOURCE_H
 521     /* Reset resource limits. If we are run as root (for system mode)
 522      * this might end up increasing the limits, which is intended
 523      * behaviour. For all other cases, i.e. started as normal user, or
 524      * SUID root at this point we should have no CAP_SYS_RESOURCE and
 525      * increasing the limits thus should fail. Which is, too, intended
 526      * behaviour */
 527
 528     set_all_rlimits(conf);
 529 #endif
 530
 531     if (conf->high_priority && !pa_can_high_priority()) {
 532         pa_log_warn(_("High-priority scheduling enabled in configuration but not allowed by policy."));
 533         conf->high_priority = FALSE;
 534     }
 535
 536     if (conf->high_priority && (conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START))
 537         pa_raise_priority(conf->nice_level);
 538
 539     pa_log_debug("Can realtime: %s, can high-priority: %s", pa_yes_no(pa_can_realtime()), pa_yes_no(pa_can_high_priority()));
 540
 541     if (!real_root && pa_have_caps()) {
 542         pa_bool_t drop;
 543
 544         drop = (conf->cmd != PA_CMD_DAEMON && conf->cmd != PA_CMD_START) || !conf->realtime_scheduling;
 545
 546 #ifdef RLIMIT_RTPRIO
 547         if (!drop) {
 548             struct rlimit rl;
 549             /* At this point we still have CAP_NICE if we were loaded
 550              * SUID root. If possible let's acquire RLIMIT_RTPRIO
 551              * instead and give CAP_NICE up. */
 552
 553             if (getrlimit(RLIMIT_RTPRIO, &rl) >= 0) {
 554
 555                 if (rl.rlim_cur >= 9)
 556                     drop = TRUE;
 557                 else {
 558                     rl.rlim_max = rl.rlim_cur = 9;
 559
 560                     if (setrlimit(RLIMIT_RTPRIO, &rl) >= 0) {
 561                         pa_log_info(_("Successfully increased RLIMIT_RTPRIO"));
 562                         drop = TRUE;
 563                     } else
 564                         pa_log_warn(_("RLIMIT_RTPRIO failed: %s"), pa_cstrerror(errno));
 565                 }
 566             }
 567         }
 568 #endif
 569
 570         if (drop)  {
 571             pa_log_info(_("Giving up CAP_NICE"));
 572             pa_drop_caps();
 573             suid_root = FALSE;
 574         }
 575     }
 576
 577     if (conf->realtime_scheduling && !pa_can_realtime()) {
 578         pa_log_warn(_("Real-time scheduling enabled in configuration but not allowed by policy."));
 579         conf->realtime_scheduling = FALSE;
 580     }
 581
 582     pa_log_debug("Can realtime: %s, can high-priority: %s", pa_yes_no(pa_can_realtime()), pa_yes_no(pa_can_high_priority()));
 583
 584     LTDL_SET_PRELOADED_SYMBOLS();
 585     pa_ltdl_init();
 586     ltdl_init = TRUE;
 587
 588     if (conf->dl_search_path)
 589         lt_dlsetsearchpath(conf->dl_search_path);
 590
 591 #ifdef OS_IS_WIN32
 592     {
 593         WSADATA data;
 594         WSAStartup(MAKEWORD(2, 0), &data);
 595     }
 596 #endif
 597
 598     pa_random_seed();
 599
 600     switch (conf->cmd) {
 601         case PA_CMD_DUMP_MODULES:
 602             pa_dump_modules(conf, argc-d, argv+d);
 603             retval = 0;
 604             goto finish;
 605
 606         case PA_CMD_DUMP_CONF: {
 607             s = pa_daemon_conf_dump(conf);
 608             fputs(s, stdout);
 609             pa_xfree(s);
 610             retval = 0;
 611             goto finish;
 612         }
 613
 614         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 615             int i;
 616
 617             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 618                 if (pa_resample_method_supported(i))
 619                     printf("%s\n", pa_resample_method_to_string(i));
 620
 621             retval = 0;
 622             goto finish;
 623         }
 624
 625         case PA_CMD_HELP :
 626             pa_cmdline_help(argv[0]);
 627             retval = 0;
 628             goto finish;
 629
 630         case PA_CMD_VERSION :
 631             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 632             retval = 0;
 633             goto finish;
 634
 635         case PA_CMD_CHECK: {
 636             pid_t pid;
 637
 638             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 639                 pa_log_info(_("Daemon not running"));
 640             else {
 641                 pa_log_info(_("Daemon running as PID %u"), pid);
 642                 retval = 0;
 643             }
 644
 645             goto finish;
 646
 647         }
 648         case PA_CMD_KILL:
 649
 650             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 651                 pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno));
 652             else
 653                 retval = 0;
 654
 655             goto finish;
 656
 657         case PA_CMD_CLEANUP_SHM:
 658
 659             if (pa_shm_cleanup() >= 0)
 660                 retval = 0;
 661
 662             goto finish;
 663
 664         default:
 665             pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START);
 666     }
 667
 668     if (real_root && !conf->system_instance)
 669         pa_log_warn(_("This program is not intended to be run as root (unless --system is specified)."));
 670     else if (!real_root && conf->system_instance) {
 671         pa_log(_("Root privileges required."));
 672         goto finish;
 673     }
 674
 675     if (conf->cmd == PA_CMD_START && conf->system_instance) {
 676         pa_log(_("--start not supported for system instances."));
 677         goto finish;
 678     }
 679
 680     if (conf->system_instance && !conf->disallow_exit)
 681         pa_log_warn(_("Running in system mode, but --disallow-exit not set!"));
 682
 683     if (conf->system_instance && !conf->disallow_module_loading)
 684         pa_log_warn(_("Running in system mode, but --disallow-module-loading not set!"));
 685
 686     if (conf->system_instance && !conf->disable_shm) {
 687         pa_log_notice(_("Running in system mode, forcibly disabling SHM mode!"));
 688         conf->disable_shm = TRUE;
 689     }
 690
 691     if (conf->system_instance && conf->exit_idle_time >= 0) {
 692         pa_log_notice(_("Running in system mode, forcibly disabling exit idle time!"));
 693         conf->exit_idle_time = -1;
 694     }
 695
 696     if (conf->cmd == PA_CMD_START) {
 697         /* If we shall start PA only when it is not running yet, we
 698          * first take the autospawn lock to make things
 699          * synchronous. */
 700
 701         if ((autospawn_fd = pa_autospawn_lock_init()) < 0) {
 702             pa_log("Failed to initialize autospawn lock");
 703             goto finish;
 704         }
 705
 706         if ((pa_autospawn_lock_acquire(TRUE) < 0)) {
 707             pa_log("Failed to acquire autospawn lock");
 708             goto finish;
 709         }
 710
 711         autospawn_locked = TRUE;
 712     }
 713
 714     if (conf->daemonize) {
 715         pid_t child;
 716         int tty_fd;
 717
 718         if (pa_stdio_acquire() < 0) {
 719             pa_log(_("Failed to acquire stdio."));
 720             goto finish;
 721         }
 722
 723 #ifdef HAVE_FORK
 724         if (pipe(daemon_pipe) < 0) {
 725             pa_log(_("pipe failed: %s"), pa_cstrerror(errno));
 726             goto finish;
 727         }
 728
 729         if ((child = fork()) < 0) {
 730             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 731             goto finish;
 732         }
 733
 734         if (child != 0) {
 735             ssize_t n;
 736             /* Father */
 737
 738             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 739             daemon_pipe[1] = -1;
 740
 741             if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 742
 743                 if (n < 0)
 744                     pa_log(_("read() failed: %s"), pa_cstrerror(errno));
 745
 746                 retval = 1;
 747             }
 748
 749             if (retval)
 750                 pa_log(_("Daemon startup failed."));
 751             else
 752                 pa_log_info(_("Daemon startup successful."));
 753
 754             goto finish;
 755         }
 756
 757         if (autospawn_fd >= 0) {
 758             /* The lock file is unlocked from the parent, so we need
 759              * to close it in the child */
 760
 761             pa_autospawn_lock_release();
 762             pa_autospawn_lock_done(TRUE);
 763
 764             autospawn_locked = FALSE;
 765             autospawn_fd = -1;
 766         }
 767
 768         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 769         daemon_pipe[0] = -1;
 770 #endif
 771
 772         if (conf->auto_log_target)
 773             pa_log_set_target(PA_LOG_SYSLOG, NULL);
 774
 775 #ifdef HAVE_SETSID
 776         setsid();
 777 #endif
 778 #ifdef HAVE_SETPGID
 779         setpgid(0,0);
 780 #endif
 781
 782 #ifndef OS_IS_WIN32
 783         pa_close(0);
 784         pa_close(1);
 785         pa_close(2);
 786
 787         pa_assert_se(open("/dev/null", O_RDONLY) == 0);
 788         pa_assert_se(open("/dev/null", O_WRONLY) == 1);
 789         pa_assert_se(open("/dev/null", O_WRONLY) == 2);
 790 #else
 791         FreeConsole();
 792 #endif
 793
 794 #ifdef SIGTTOU
 795         signal(SIGTTOU, SIG_IGN);
 796 #endif
 797 #ifdef SIGTTIN
 798         signal(SIGTTIN, SIG_IGN);
 799 #endif
 800 #ifdef SIGTSTP
 801         signal(SIGTSTP, SIG_IGN);
 802 #endif
 803
 804 #ifdef TIOCNOTTY
 805         if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
 806             ioctl(tty_fd, TIOCNOTTY, (char*) 0);
 807             pa_assert_se(pa_close(tty_fd) == 0);
 808         }
 809 #endif
 810     }
 811
 812     pa_set_env("PULSE_INTERNAL", "1");
 813     pa_assert_se(chdir("/") == 0);
 814     umask(0022);
 815
 816     if (conf->system_instance)
 817         if (change_user() < 0)
 818             goto finish;
 819
 820     pa_set_env("PULSE_SYSTEM", conf->system_instance ? "1" : "0");
 821
 822     pa_log_info(_("This is PulseAudio %s"), PACKAGE_VERSION);
 823     pa_log_debug(_("Compilation host: %s"), CANONICAL_HOST);
 824     pa_log_debug(_("Compilation CFLAGS: %s"), PA_CFLAGS);
 825
 826     s = pa_uname_string();
 827     pa_log_debug(_("Running on host: %s"), s);
 828     pa_xfree(s);
 829
 830     pa_log_debug(_("Found %u CPUs."), pa_ncpus());
 831
 832     pa_log_info(_("Page size is %lu bytes"), (unsigned long) PA_PAGE_SIZE);
 833
 834 #ifdef HAVE_VALGRIND_MEMCHECK_H
 835     pa_log_debug(_("Compiled with Valgrind support: yes"));
 836 #else
 837     pa_log_debug(_("Compiled with Valgrind support: no"));
 838 #endif
 839
 840     pa_log_debug(_("Running in valgrind mode: %s"), pa_yes_no(pa_in_valgrind()));
 841
 842 #ifdef __OPTIMIZE__
 843     pa_log_debug(_("Optimized build: yes"));
 844 #else
 845     pa_log_debug(_("Optimized build: no"));
 846 #endif
 847
 848     if (!(s = pa_machine_id())) {
 849         pa_log(_("Failed to get machine ID"));
 850         goto finish;
 851     }
 852     pa_log_info(_("Machine ID is %s."), s);
 853     pa_xfree(s);
 854
 855     if (!(s = pa_get_runtime_dir()))
 856         goto finish;
 857     pa_log_info(_("Using runtime directory %s."), s);
 858     pa_xfree(s);
 859
 860     if (!(s = pa_get_state_dir()))
 861         goto finish;
 862     pa_log_info(_("Using state directory %s."), s);
 863     pa_xfree(s);
 864
 865     pa_log_info(_("Running in system mode: %s"), pa_yes_no(pa_in_system_mode()));
 866
 867     if (conf->use_pid_file) {
 868         int z;
 869
 870         if ((z = pa_pid_file_create("pulseaudio")) != 0) {
 871
 872             if (conf->cmd == PA_CMD_START && z > 0) {
 873                 /* If we are already running and with are run in
 874                  * --start mode, then let's return this as success. */
 875
 876                 retval = 0;
 877                 goto finish;
 878             }
 879
 880             pa_log(_("pa_pid_file_create() failed."));
 881             goto finish;
 882         }
 883
 884         valid_pid_file = TRUE;
 885     }
 886
 887 #ifdef SIGPIPE
 888     signal(SIGPIPE, SIG_IGN);
 889 #endif
 890
 891     if (pa_rtclock_hrtimer())
 892         pa_log_info(_("Fresh high-resolution timers available! Bon appetit!"));
 893     else
 894         pa_log_info(_("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!"));
 895
 896     pa_rtclock_hrtimer_enable();
 897
 898 #ifdef SIGRTMIN
 899     /* Valgrind uses SIGRTMAX. To easy debugging we don't use it here */
 900     pa_rtsig_configure(SIGRTMIN, SIGRTMAX-1);
 901 #endif
 902
 903     pa_assert_se(mainloop = pa_mainloop_new());
 904
 905     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm, conf->shm_size))) {
 906         pa_log(_("pa_core_new() failed."));
 907         goto finish;
 908     }
 909
 910     c->default_sample_spec = conf->default_sample_spec;
 911     c->default_channel_map = conf->default_channel_map;
 912     c->default_n_fragments = conf->default_n_fragments;
 913     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 914     c->exit_idle_time = conf->exit_idle_time;
 915     c->scache_idle_time = conf->scache_idle_time;
 916     c->resample_method = conf->resample_method;
 917     c->realtime_priority = conf->realtime_priority;
 918     c->realtime_scheduling = !!conf->realtime_scheduling;
 919     c->disable_remixing = !!conf->disable_remixing;
 920     c->disable_lfe_remixing = !!conf->disable_lfe_remixing;
 921     c->running_as_daemon = !!conf->daemonize;
 922     c->disallow_exit = conf->disallow_exit;
 923     c->flat_volumes = conf->flat_volumes;
 924
 925     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 926     pa_signal_new(SIGINT, signal_callback, c);
 927     pa_signal_new(SIGTERM, signal_callback, c);
 928 #ifdef SIGUSR1
 929     pa_signal_new(SIGUSR1, signal_callback, c);
 930 #endif
 931 #ifdef SIGUSR2
 932     pa_signal_new(SIGUSR2, signal_callback, c);
 933 #endif
 934 #ifdef SIGHUP
 935     pa_signal_new(SIGHUP, signal_callback, c);
 936 #endif
 937
 938 #ifdef OS_IS_WIN32
 939     win32_timer = pa_mainloop_get_api(mainloop)->time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL);
 940 #endif
 941
 942     oil_init();
 943
 944     if (!conf->no_cpu_limit)
 945         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 946
 947     buf = pa_strbuf_new();
 948     if (conf->load_default_script_file) {
 949         FILE *f;
 950
 951         if ((f = pa_daemon_conf_open_default_script_file(conf))) {
 952             r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
 953             fclose(f);
 954         }
 955     }
 956
 957     if (r >= 0)
 958         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 959
 960     pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 961     pa_xfree(s);
 962
 963     /* We completed the initial module loading, so let's disable it
 964      * from now on, if requested */
 965     c->disallow_module_loading = !!conf->disallow_module_loading;
 966
 967     if (r < 0 && conf->fail) {
 968         pa_log(_("Failed to initialize daemon."));
 969         goto finish;
 970     }
 971
 972     if (!c->modules || pa_idxset_size(c->modules) == 0) {
 973         pa_log(_("Daemon startup without any loaded modules, refusing to work."));
 974         goto finish;
 975     }
 976
 977 #ifdef HAVE_FORK
 978     if (daemon_pipe[1] >= 0) {
 979         int ok = 0;
 980         pa_loop_write(daemon_pipe[1], &ok, sizeof(ok), NULL);
 981         pa_close(daemon_pipe[1]);
 982         daemon_pipe[1] = -1;
 983     }
 984 #endif
 985
 986     pa_log_info(_("Daemon startup complete."));
 987
 988     retval = 0;
 989     if (pa_mainloop_run(mainloop, &retval) < 0)
 990         goto finish;
 991
 992     pa_log_info(_("Daemon shutdown initiated."));
 993
 994 finish:
 995
 996     if (autospawn_fd >= 0) {
 997         if (autospawn_locked)
 998             pa_autospawn_lock_release();
 999
1000         pa_autospawn_lock_done(FALSE);
1001     }
1002
1003 #ifdef OS_IS_WIN32
1004     if (win32_timer)
1005         pa_mainloop_get_api(mainloop)->time_free(win32_timer);
1006 #endif
1007
1008     if (c) {
1009         pa_core_unref(c);
1010         pa_log_info(_("Daemon terminated."));
1011     }
1012
1013     if (!conf->no_cpu_limit)
1014         pa_cpu_limit_done();
1015
1016     pa_signal_done();
1017
1018 #ifdef HAVE_FORK
1019     if (daemon_pipe[1] >= 0)
1020         pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
1021
1022     pa_close_pipe(daemon_pipe);
1023 #endif
1024
1025     if (mainloop)
1026         pa_mainloop_free(mainloop);
1027
1028     if (conf)
1029         pa_daemon_conf_free(conf);
1030
1031     if (valid_pid_file)
1032         pa_pid_file_remove();
1033
1034 #ifdef OS_IS_WIN32
1035     WSACleanup();
1036 #endif
1037
1038     if (ltdl_init)
1039         pa_ltdl_done();
1040
1041 #ifdef HAVE_DBUS
1042     dbus_shutdown();
1043 #endif
1044
1045     return retval;
1046 }