code.delx.au - pulseaudio/blob - src/daemon/main.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as published
  11   by the Free Software Foundation; either version 2 of the License,
  12   or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <unistd.h>
  30 #include <errno.h>
  31 #include <string.h>
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #include <signal.h>
  35 #include <stddef.h>
  36 #include <ltdl.h>
  37 #include <limits.h>
  38 #include <fcntl.h>
  39 #include <unistd.h>
  40 #include <locale.h>
  41 #include <sys/types.h>
  42
  43 #include <liboil/liboil.h>
  44
  45 #ifdef HAVE_SYS_IOCTL_H
  46 #include <sys/ioctl.h>
  47 #endif
  48
  49 #ifdef HAVE_PWD_H
  50 #include <pwd.h>
  51 #endif
  52 #ifdef HAVE_GRP_H
  53 #include <grp.h>
  54 #endif
  55
  56 #ifdef HAVE_LIBWRAP
  57 #include <syslog.h>
  58 #include <tcpd.h>
  59 #endif
  60
  61 #ifdef HAVE_DBUS
  62 #include <dbus/dbus.h>
  63 #endif
  64
  65 #include <pulse/mainloop.h>
  66 #include <pulse/mainloop-signal.h>
  67 #include <pulse/timeval.h>
  68 #include <pulse/xmalloc.h>
  69
  70 #include <pulsecore/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, PA_GCC_UNUSED 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_GCC_UNUSED 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("Warning: 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 (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
 206         pa_log("Failed to change group list: %s", pa_cstrerror(errno));
 207         return -1;
 208     }
 209
 210 #if defined(HAVE_SETRESGID)
 211     r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
 212 #elif defined(HAVE_SETEGID)
 213     if ((r = setgid(gr->gr_gid)) >= 0)
 214         r = setegid(gr->gr_gid);
 215 #elif defined(HAVE_SETREGID)
 216     r = setregid(gr->gr_gid, gr->gr_gid);
 217 #else
 218 #error "No API to drop priviliges"
 219 #endif
 220
 221     if (r < 0) {
 222         pa_log("Failed to change GID: %s", pa_cstrerror(errno));
 223         return -1;
 224     }
 225
 226 #if defined(HAVE_SETRESUID)
 227     r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
 228 #elif defined(HAVE_SETEUID)
 229     if ((r = setuid(pw->pw_uid)) >= 0)
 230         r = seteuid(pw->pw_uid);
 231 #elif defined(HAVE_SETREUID)
 232     r = setreuid(pw->pw_uid, pw->pw_uid);
 233 #else
 234 #error "No API to drop priviliges"
 235 #endif
 236
 237     if (r < 0) {
 238         pa_log("Failed to change UID: %s", pa_cstrerror(errno));
 239         return -1;
 240     }
 241
 242     pa_set_env("USER", PA_SYSTEM_USER);
 243     pa_set_env("USERNAME", PA_SYSTEM_USER);
 244     pa_set_env("LOGNAME", PA_SYSTEM_USER);
 245     pa_set_env("HOME", PA_SYSTEM_RUNTIME_PATH);
 246
 247     /* Relevant for pa_runtime_path() */
 248     pa_set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
 249     pa_set_env("PULSE_CONFIG_PATH", PA_SYSTEM_RUNTIME_PATH);
 250
 251     pa_log_info("Successfully dropped root privileges.");
 252
 253     return 0;
 254 }
 255
 256 #else /* HAVE_PWD_H && HAVE_GRP_H */
 257
 258 static int change_user(void) {
 259     pa_log("System wide mode unsupported on this platform.");
 260     return -1;
 261 }
 262
 263 #endif /* HAVE_PWD_H && HAVE_GRP_H */
 264
 265 #ifdef HAVE_SYS_RESOURCE_H
 266
 267 static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
 268     struct rlimit rl;
 269     pa_assert(r);
 270
 271     if (!r->is_set)
 272         return 0;
 273
 274     rl.rlim_cur = rl.rlim_max = r->value;
 275
 276     if (setrlimit(resource, &rl) < 0) {
 277         pa_log_info("setrlimit(%s, (%u, %u)) failed: %s", name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
 278         return -1;
 279     }
 280
 281     return 0;
 282 }
 283
 284 static void set_all_rlimits(const pa_daemon_conf *conf) {
 285     set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
 286     set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
 287     set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
 288     set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
 289     set_one_rlimit(&conf->rlimit_rss, RLIMIT_RSS, "RLIMIT_RSS");
 290 #ifdef RLIMIT_NPROC
 291     set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
 292 #endif
 293     set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
 294 #ifdef RLIMIT_MEMLOCK
 295     set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
 296 #endif
 297     set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
 298 #ifdef RLIMIT_LOCKS
 299     set_one_rlimit(&conf->rlimit_locks, RLIMIT_LOCKS, "RLIMIT_LOCKS");
 300 #endif
 301 #ifdef RLIMIT_SIGPENDING
 302     set_one_rlimit(&conf->rlimit_sigpending, RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING");
 303 #endif
 304 #ifdef RLIMIT_MSGQUEUE
 305     set_one_rlimit(&conf->rlimit_msgqueue, RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE");
 306 #endif
 307 #ifdef RLIMIT_NICE
 308     set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
 309 #endif
 310 #ifdef RLIMIT_RTPRIO
 311     set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
 312 #endif
 313 #ifdef RLIMIT_RTTIME
 314     set_one_rlimit(&conf->rlimit_rttime, RLIMIT_RTTIME, "RLIMIT_RTTIME");
 315 #endif
 316 }
 317 #endif
 318
 319 int main(int argc, char *argv[]) {
 320     pa_core *c = NULL;
 321     pa_strbuf *buf = NULL;
 322     pa_daemon_conf *conf = NULL;
 323     pa_mainloop *mainloop = NULL;
 324     char *s;
 325     int r = 0, retval = 1, d = 0;
 326     pa_bool_t suid_root, real_root;
 327     pa_bool_t valid_pid_file = FALSE;
 328     gid_t gid = (gid_t) -1;
 329     pa_bool_t ltdl_init = FALSE;
 330     int passed_fd = -1;
 331     const char *e;
 332 #ifdef HAVE_FORK
 333     int daemon_pipe[2] = { -1, -1 };
 334 #endif
 335 #ifdef OS_IS_WIN32
 336     pa_time_event *win32_timer;
 337     struct timeval win32_tv;
 338 #endif
 339
 340 #if defined(__linux__) && defined(__OPTIMIZE__)
 341     /*
 342        Disable lazy relocations to make usage of external libraries
 343        more deterministic for our RT threads. We abuse __OPTIMIZE__ as
 344        a check whether we are a debug build or not.
 345     */
 346
 347     if (!getenv("LD_BIND_NOW")) {
 348         char *rp;
 349
 350         /* We have to execute ourselves, because the libc caches the
 351          * value of $LD_BIND_NOW on initialization. */
 352
 353         pa_set_env("LD_BIND_NOW", "1");
 354         pa_assert_se(rp = pa_readlink("/proc/self/exe"));
 355         pa_assert_se(execv(rp, argv) == 0);
 356     }
 357 #endif
 358
 359 #ifdef HAVE_GETUID
 360     real_root = getuid() == 0;
 361     suid_root = !real_root && geteuid() == 0;
 362 #else
 363     real_root = FALSE;
 364     suid_root = FALSE;
 365 #endif
 366
 367     if (suid_root) {
 368         /* Drop all capabilities except CAP_SYS_NICE  */
 369         pa_limit_caps();
 370
 371         /* Drop priviliges, but keep CAP_SYS_NICE */
 372         pa_drop_root();
 373
 374         /* After dropping root, the effective set is reset, hence,
 375          * let's raise it again */
 376         pa_limit_caps();
 377
 378         /* When capabilities are not supported we will not be able to
 379          * aquire RT sched anymore. But yes, that's the way it is. It
 380          * is just too risky tun let PA run as root all the time. */
 381     }
 382
 383     if ((e = getenv("PULSE_PASSED_FD"))) {
 384         passed_fd = atoi(e);
 385
 386         if (passed_fd <= 2)
 387             passed_fd = -1;
 388     }
 389
 390     pa_close_all(passed_fd, -1);
 391
 392     pa_reset_sigs(-1);
 393     pa_unblock_sigs(-1);
 394
 395     /* At this point, we are a normal user, possibly with CAP_NICE if
 396      * we were started SUID. If we are started as normal root, than we
 397      * still are normal root. */
 398
 399     setlocale(LC_ALL, "");
 400     pa_log_set_maximal_level(PA_LOG_INFO);
 401     pa_log_set_ident("pulseaudio");
 402
 403     conf = pa_daemon_conf_new();
 404
 405     if (pa_daemon_conf_load(conf, NULL) < 0)
 406         goto finish;
 407
 408     if (pa_daemon_conf_env(conf) < 0)
 409         goto finish;
 410
 411     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 412         pa_log("Failed to parse command line.");
 413         goto finish;
 414     }
 415
 416     pa_log_set_maximal_level(conf->log_level);
 417     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);
 418
 419     if (suid_root) {
 420         pa_bool_t allow_realtime, allow_high_priority;
 421
 422         /* Ok, we're suid root, so let's better not enable high prio
 423          * or RT by default */
 424
 425         allow_high_priority = allow_realtime = FALSE;
 426
 427         if (conf->high_priority || conf->realtime_scheduling)
 428             if (pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) {
 429                 pa_log_info("We're in the group '"PA_REALTIME_GROUP"', allowing real-time and high-priority scheduling.");
 430                 allow_realtime = conf->realtime_scheduling;
 431                 allow_high_priority = conf->high_priority;
 432             }
 433
 434 #ifdef HAVE_POLKIT
 435         if (conf->high_priority && !allow_high_priority) {
 436             if (pa_polkit_check("org.pulseaudio.acquire-high-priority") > 0) {
 437                 pa_log_info("PolicyKit grants us acquire-high-priority privilege.");
 438                 allow_high_priority = TRUE;
 439             } else
 440                 pa_log_info("PolicyKit refuses acquire-high-priority privilege.");
 441         }
 442
 443         if (conf->realtime_scheduling && !allow_realtime) {
 444             if (pa_polkit_check("org.pulseaudio.acquire-real-time") > 0) {
 445                 pa_log_info("PolicyKit grants us acquire-real-time privilege.");
 446                 allow_realtime = TRUE;
 447             } else
 448                 pa_log_info("PolicyKit refuses acquire-real-time privilege.");
 449         }
 450 #endif
 451
 452         if (!allow_high_priority && !allow_realtime) {
 453
 454             /* OK, there's no further need to keep CAP_NICE. Hence
 455              * let's give it up early */
 456
 457             pa_drop_caps();
 458             suid_root = FALSE;
 459
 460             if (conf->high_priority || conf->realtime_scheduling)
 461                 pa_log_notice("Called SUID root and real-time/high-priority scheduling was requested in the configuration. However, we lack the necessary priviliges:\n"
 462                               "We are not in group '"PA_REALTIME_GROUP"' and PolicyKit refuse to grant us priviliges. Dropping SUID again.\n"
 463                               "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.");
 464         }
 465     }
 466
 467 #ifdef HAVE_SYS_RESOURCE_H
 468     /* Reset resource limits. If we are run as root (for system mode)
 469      * this might end up increasing the limits, which is intended
 470      * behaviour. For all other cases, i.e. started as normal user, or
 471      * SUID root at this point we should have no CAP_SYS_RESOURCE and
 472      * increasing the limits thus should fail. Which is, too, intended
 473      * behaviour */
 474
 475     set_all_rlimits(conf);
 476 #endif
 477
 478     if (conf->high_priority && !pa_can_high_priority())
 479         pa_log_warn("High-priority scheduling enabled in configuration but not allowed by policy.");
 480
 481     if (conf->high_priority && conf->cmd == PA_CMD_DAEMON)
 482         pa_raise_priority(conf->nice_level);
 483
 484     if (suid_root) {
 485         pa_bool_t drop;
 486
 487         drop = conf->cmd != PA_CMD_DAEMON || !conf->realtime_scheduling;
 488
 489 #ifdef RLIMIT_RTPRIO
 490         if (!drop) {
 491             struct rlimit rl;
 492             /* At this point we still have CAP_NICE if we were loaded
 493              * SUID root. If possible let's acquire RLIMIT_RTPRIO
 494              * instead and give CAP_NICE up. */
 495
 496             if (getrlimit(RLIMIT_RTPRIO, &rl) >= 0) {
 497
 498                 if (rl.rlim_cur >= 9)
 499                     drop = TRUE;
 500                 else {
 501                     rl.rlim_max = rl.rlim_cur = 9;
 502
 503                     if (setrlimit(RLIMIT_RTPRIO, &rl) >= 0) {
 504                         pa_log_info("Successfully increased RLIMIT_RTPRIO");
 505                         drop = TRUE;
 506                     } else
 507                         pa_log_warn("RLIMIT_RTPRIO failed: %s", pa_cstrerror(errno));
 508                 }
 509             }
 510         }
 511 #endif
 512
 513         if (drop)  {
 514             pa_log_info("Giving up CAP_NICE");
 515             pa_drop_caps();
 516             suid_root = FALSE;
 517         }
 518     }
 519
 520     if (conf->realtime_scheduling && !pa_can_realtime())
 521         pa_log_warn("Real-time scheduling enabled in configuration but not allowed by policy.");
 522
 523     LTDL_SET_PRELOADED_SYMBOLS();
 524     pa_ltdl_init();
 525     ltdl_init = TRUE;
 526
 527     if (conf->dl_search_path)
 528         lt_dlsetsearchpath(conf->dl_search_path);
 529
 530 #ifdef OS_IS_WIN32
 531     {
 532         WSADATA data;
 533         WSAStartup(MAKEWORD(2, 0), &data);
 534     }
 535 #endif
 536
 537     pa_random_seed();
 538
 539     switch (conf->cmd) {
 540         case PA_CMD_DUMP_MODULES:
 541             pa_dump_modules(conf, argc-d, argv+d);
 542             retval = 0;
 543             goto finish;
 544
 545         case PA_CMD_DUMP_CONF: {
 546             s = pa_daemon_conf_dump(conf);
 547             fputs(s, stdout);
 548             pa_xfree(s);
 549             retval = 0;
 550             goto finish;
 551         }
 552
 553         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 554             int i;
 555
 556             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 557                 if (pa_resample_method_supported(i))
 558                     printf("%s\n", pa_resample_method_to_string(i));
 559
 560             goto finish;
 561         }
 562
 563         case PA_CMD_HELP :
 564             pa_cmdline_help(argv[0]);
 565             retval = 0;
 566             goto finish;
 567
 568         case PA_CMD_VERSION :
 569             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 570             retval = 0;
 571             goto finish;
 572
 573         case PA_CMD_CHECK: {
 574             pid_t pid;
 575
 576             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 577                 pa_log_info("Daemon not running");
 578             else {
 579                 pa_log_info("Daemon running as PID %u", pid);
 580                 retval = 0;
 581             }
 582
 583             goto finish;
 584
 585         }
 586         case PA_CMD_KILL:
 587
 588             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 589                 pa_log("Failed to kill daemon.");
 590             else
 591                 retval = 0;
 592
 593             goto finish;
 594
 595         case PA_CMD_CLEANUP_SHM:
 596
 597             if (pa_shm_cleanup() >= 0)
 598                 retval = 0;
 599
 600             goto finish;
 601
 602         default:
 603             pa_assert(conf->cmd == PA_CMD_DAEMON);
 604     }
 605
 606     if (real_root && !conf->system_instance)
 607         pa_log_warn("This program is not intended to be run as root (unless --system is specified).");
 608     else if (!real_root && conf->system_instance) {
 609         pa_log("Root priviliges required.");
 610         goto finish;
 611     }
 612
 613     if (conf->daemonize) {
 614         pid_t child;
 615         int tty_fd;
 616
 617         if (pa_stdio_acquire() < 0) {
 618             pa_log("Failed to acquire stdio.");
 619             goto finish;
 620         }
 621
 622 #ifdef HAVE_FORK
 623         if (pipe(daemon_pipe) < 0) {
 624             pa_log("pipe failed: %s", pa_cstrerror(errno));
 625             goto finish;
 626         }
 627
 628         if ((child = fork()) < 0) {
 629             pa_log("fork() failed: %s", pa_cstrerror(errno));
 630             goto finish;
 631         }
 632
 633         if (child != 0) {
 634             ssize_t n;
 635             /* Father */
 636
 637             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 638             daemon_pipe[1] = -1;
 639
 640             if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 641
 642                 if (n < 0)
 643                     pa_log("read() failed: %s", pa_cstrerror(errno));
 644
 645                 retval = 1;
 646             }
 647
 648             if (retval)
 649                 pa_log("Daemon startup failed.");
 650             else
 651                 pa_log_info("Daemon startup successful.");
 652
 653             goto finish;
 654         }
 655
 656         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 657         daemon_pipe[0] = -1;
 658 #endif
 659
 660         if (conf->auto_log_target)
 661             pa_log_set_target(PA_LOG_SYSLOG, NULL);
 662
 663 #ifdef HAVE_SETSID
 664         setsid();
 665 #endif
 666 #ifdef HAVE_SETPGID
 667         setpgid(0,0);
 668 #endif
 669
 670 #ifndef OS_IS_WIN32
 671         pa_close(0);
 672         pa_close(1);
 673         pa_close(2);
 674
 675         pa_assert_se(open("/dev/null", O_RDONLY) == 0);
 676         pa_assert_se(open("/dev/null", O_WRONLY) == 1);
 677         pa_assert_se(open("/dev/null", O_WRONLY) == 2);
 678 #else
 679         FreeConsole();
 680 #endif
 681
 682 #ifdef SIGTTOU
 683         signal(SIGTTOU, SIG_IGN);
 684 #endif
 685 #ifdef SIGTTIN
 686         signal(SIGTTIN, SIG_IGN);
 687 #endif
 688 #ifdef SIGTSTP
 689         signal(SIGTSTP, SIG_IGN);
 690 #endif
 691
 692 #ifdef TIOCNOTTY
 693         if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
 694             ioctl(tty_fd, TIOCNOTTY, (char*) 0);
 695             pa_assert_se(pa_close(tty_fd) == 0);
 696         }
 697 #endif
 698     }
 699
 700     pa_set_env("PULSE_INTERNAL", "1");
 701     pa_assert_se(chdir("/") == 0);
 702     umask(0022);
 703
 704     if (conf->system_instance)
 705         if (change_user() < 0)
 706             goto finish;
 707
 708     pa_log_info("This is PulseAudio " PACKAGE_VERSION);
 709     pa_log_info("Page size is %lu bytes", (unsigned long) PA_PAGE_SIZE);
 710     pa_log_info("Using runtime directory %s.", s = pa_get_runtime_dir());
 711     pa_xfree(s);
 712
 713     if (conf->use_pid_file) {
 714         if (pa_pid_file_create() < 0) {
 715             pa_log("pa_pid_file_create() failed.");
 716             goto finish;
 717         }
 718
 719         valid_pid_file = TRUE;
 720     }
 721
 722 #ifdef SIGPIPE
 723     signal(SIGPIPE, SIG_IGN);
 724 #endif
 725
 726     if (pa_rtclock_hrtimer())
 727         pa_log_info("Fresh high-resolution timers available! Bon appetit!");
 728     else
 729         pa_log_info("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!");
 730
 731 #ifdef SIGRTMIN
 732     /* Valgrind uses SIGRTMAX. To easy debugging we don't use it here */
 733     pa_rtsig_configure(SIGRTMIN, SIGRTMAX-1);
 734 #endif
 735
 736     pa_assert_se(mainloop = pa_mainloop_new());
 737
 738     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm))) {
 739         pa_log("pa_core_new() failed.");
 740         goto finish;
 741     }
 742
 743     c->is_system_instance = !!conf->system_instance;
 744     c->default_sample_spec = conf->default_sample_spec;
 745     c->default_n_fragments = conf->default_n_fragments;
 746     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 747     c->exit_idle_time = conf->exit_idle_time;
 748     c->module_idle_time = conf->module_idle_time;
 749     c->scache_idle_time = conf->scache_idle_time;
 750     c->resample_method = conf->resample_method;
 751     c->realtime_priority = conf->realtime_priority;
 752     c->realtime_scheduling = !!conf->realtime_scheduling;
 753     c->disable_remixing = !!conf->disable_remixing;
 754     c->running_as_daemon = !!conf->daemonize;
 755
 756     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 757     pa_signal_new(SIGINT, signal_callback, c);
 758     pa_signal_new(SIGTERM, signal_callback, c);
 759 #ifdef SIGUSR1
 760     pa_signal_new(SIGUSR1, signal_callback, c);
 761 #endif
 762 #ifdef SIGUSR2
 763     pa_signal_new(SIGUSR2, signal_callback, c);
 764 #endif
 765 #ifdef SIGHUP
 766     pa_signal_new(SIGHUP, signal_callback, c);
 767 #endif
 768
 769 #ifdef OS_IS_WIN32
 770     win32_timer = pa_mainloop_get_api(mainloop)->time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL);
 771 #endif
 772
 773     oil_init();
 774
 775     if (!conf->no_cpu_limit)
 776         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 777
 778     buf = pa_strbuf_new();
 779     if (conf->load_default_script_file) {
 780         FILE *f;
 781
 782         if ((f = pa_daemon_conf_open_default_script_file(conf))) {
 783             r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
 784             fclose(f);
 785         }
 786     }
 787
 788     if (r >= 0)
 789         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 790
 791     pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 792     pa_xfree(s);
 793
 794     /* We completed the initial module loading, so let's disable it
 795      * from now on, if requested */
 796     c->disallow_module_loading = !!conf->disallow_module_loading;
 797
 798     if (r < 0 && conf->fail) {
 799         pa_log("Failed to initialize daemon.");
 800         goto finish;
 801     }
 802
 803     if (!c->modules || pa_idxset_size(c->modules) == 0) {
 804         pa_log("Daemon startup without any loaded modules, refusing to work.");
 805         goto finish;
 806     }
 807
 808     if (c->default_sink_name && !pa_namereg_get(c, c->default_sink_name, PA_NAMEREG_SINK, TRUE) && conf->fail) {
 809         pa_log_error("Default sink name (%s) does not exist in name register.", c->default_sink_name);
 810         goto finish;
 811     }
 812
 813
 814 #ifdef HAVE_FORK
 815     if (conf->daemonize) {
 816         int ok = 0;
 817         pa_loop_write(daemon_pipe[1], &ok, sizeof(ok), NULL);
 818     }
 819 #endif
 820
 821     pa_log_info("Daemon startup complete.");
 822
 823     retval = 0;
 824     if (pa_mainloop_run(mainloop, &retval) < 0)
 825         goto finish;
 826
 827     pa_log_info("Daemon shutdown initiated.");
 828
 829 finish:
 830
 831 #ifdef OS_IS_WIN32
 832     if (win32_timer)
 833         pa_mainloop_get_api(mainloop)->time_free(win32_timer);
 834 #endif
 835
 836     if (c) {
 837         pa_core_unref(c);
 838         pa_log_info("Daemon terminated.");
 839     }
 840
 841     if (!conf->no_cpu_limit)
 842         pa_cpu_limit_done();
 843
 844     pa_signal_done();
 845
 846 #ifdef HAVE_FORK
 847     pa_close_pipe(daemon_pipe);
 848 #endif
 849
 850     if (mainloop)
 851         pa_mainloop_free(mainloop);
 852
 853     if (conf)
 854         pa_daemon_conf_free(conf);
 855
 856     if (valid_pid_file)
 857         pa_pid_file_remove();
 858
 859 #ifdef OS_IS_WIN32
 860     WSACleanup();
 861 #endif
 862
 863     if (ltdl_init)
 864         pa_ltdl_done();
 865
 866 #ifdef HAVE_DBUS
 867     dbus_shutdown();
 868 #endif
 869
 870     return retval;
 871 }