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