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