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 #define set_env(key, value) putenv(pa_sprintf_malloc("%s=%s", (key), (value)))
 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 (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
 208         pa_log("Failed to change group list: %s", pa_cstrerror(errno));
 209         return -1;
 210     }
 211
 212 #if defined(HAVE_SETRESGID)
 213     r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
 214 #elif defined(HAVE_SETEGID)
 215     if ((r = setgid(gr->gr_gid)) >= 0)
 216         r = setegid(gr->gr_gid);
 217 #elif defined(HAVE_SETREGID)
 218     r = setregid(gr->gr_gid, gr->gr_gid);
 219 #else
 220 #error "No API to drop priviliges"
 221 #endif
 222
 223     if (r < 0) {
 224         pa_log("Failed to change GID: %s", pa_cstrerror(errno));
 225         return -1;
 226     }
 227
 228 #if defined(HAVE_SETRESUID)
 229     r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
 230 #elif defined(HAVE_SETEUID)
 231     if ((r = setuid(pw->pw_uid)) >= 0)
 232         r = seteuid(pw->pw_uid);
 233 #elif defined(HAVE_SETREUID)
 234     r = setreuid(pw->pw_uid, pw->pw_uid);
 235 #else
 236 #error "No API to drop priviliges"
 237 #endif
 238
 239     if (r < 0) {
 240         pa_log("Failed to change UID: %s", pa_cstrerror(errno));
 241         return -1;
 242     }
 243
 244     set_env("USER", PA_SYSTEM_USER);
 245     set_env("LOGNAME", PA_SYSTEM_GROUP);
 246     set_env("HOME", PA_SYSTEM_RUNTIME_PATH);
 247
 248     /* Relevant for pa_runtime_path() */
 249     set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
 250     set_env("PULSE_CONFIG_PATH", PA_SYSTEM_RUNTIME_PATH);
 251
 252     pa_log_info("Successfully dropped root privileges.");
 253
 254     return 0;
 255 }
 256
 257 #else /* HAVE_PWD_H && HAVE_GRP_H */
 258
 259 static int change_user(void) {
 260     pa_log("System wide mode unsupported on this platform.");
 261     return -1;
 262 }
 263
 264 #endif /* HAVE_PWD_H && HAVE_GRP_H */
 265
 266 static int create_runtime_dir(void) {
 267     char fn[PATH_MAX];
 268
 269     pa_runtime_path(NULL, fn, sizeof(fn));
 270
 271     /* This function is called only when the daemon is started in
 272      * per-user mode. We create the runtime directory somewhere in
 273      * /tmp/ with the current UID/GID */
 274
 275     if (pa_make_secure_dir(fn, 0700, (uid_t)-1, (gid_t)-1) < 0) {
 276         pa_log("Failed to create '%s': %s", fn, pa_cstrerror(errno));
 277         return -1;
 278     }
 279
 280     return 0;
 281 }
 282
 283 #ifdef HAVE_SYS_RESOURCE_H
 284
 285 static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
 286     struct rlimit rl;
 287     pa_assert(r);
 288
 289     if (!r->is_set)
 290         return 0;
 291
 292     rl.rlim_cur = rl.rlim_max = r->value;
 293
 294     if (setrlimit(resource, &rl) < 0) {
 295         pa_log_warn("setrlimit(%s, (%u, %u)) failed: %s", name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
 296         return -1;
 297     }
 298
 299     return 0;
 300 }
 301
 302 static void set_all_rlimits(const pa_daemon_conf *conf) {
 303     set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
 304     set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
 305     set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
 306     set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
 307     set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
 308     set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
 309 #ifdef RLIMIT_NPROC
 310     set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
 311 #endif
 312 #ifdef RLIMIT_MEMLOCK
 313     set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
 314 #endif
 315 #ifdef RLIMIT_NICE
 316     set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
 317 #endif
 318 #ifdef RLIMIT_RTPRIO
 319     set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
 320 #endif
 321 }
 322 #endif
 323
 324 int main(int argc, char *argv[]) {
 325     pa_core *c = NULL;
 326     pa_strbuf *buf = NULL;
 327     pa_daemon_conf *conf = NULL;
 328     pa_mainloop *mainloop = NULL;
 329     char *s;
 330     int r = 0, retval = 1, d = 0;
 331     int daemon_pipe[2] = { -1, -1 };
 332     pa_bool_t suid_root, real_root;
 333     int valid_pid_file = 0;
 334     gid_t gid = (gid_t) -1;
 335     pa_bool_t allow_realtime, allow_high_priority;
 336     pa_bool_t ltdl_init = FALSE;
 337
 338 #ifdef OS_IS_WIN32
 339     pa_time_event *timer;
 340     struct timeval tv;
 341 #endif
 342
 343
 344 #if defined(__linux__) && defined(__OPTIMIZE__)
 345     /*
 346        Disable lazy relocations to make usage of external libraries
 347        more deterministic for our RT threads. We abuse __OPTIMIZE__ as
 348        a check whether we are a debug build or not.
 349     */
 350
 351     if (!getenv("LD_BIND_NOW")) {
 352         char *rp;
 353
 354         /* We have to execute ourselves, because the libc caches the
 355          * value of $LD_BIND_NOW on initialization. */
 356
 357         putenv(pa_xstrdup("LD_BIND_NOW=1"));
 358         pa_assert_se(rp = pa_readlink("/proc/self/exe"));
 359         pa_assert_se(execv(rp, argv) == 0);
 360     }
 361 #endif
 362
 363 #ifdef HAVE_GETUID
 364     real_root = getuid() == 0;
 365     suid_root = !real_root && geteuid() == 0;
 366 #else
 367     real_root = FALSE;
 368     suid_root = FALSE;
 369 #endif
 370
 371     if (suid_root) {
 372         /* Drop all capabilities except CAP_SYS_NICE  */
 373         pa_limit_caps();
 374
 375         /* Drop priviliges, but keep CAP_SYS_NICE */
 376         pa_drop_root();
 377
 378         /* After dropping root, the effective set is reset, hence,
 379          * let's raise it again */
 380         pa_limit_caps();
 381
 382         /* When capabilities are not supported we will not be able to
 383          * aquire RT sched anymore. But yes, that's the way it is. It
 384          * is just too risky tun let PA run as root all the time. */
 385     }
 386
 387     /* At this point, we are a normal user, possibly with CAP_NICE if
 388      * we were started SUID. If we are started as normal root, than we
 389      * still are normal root. */
 390
 391     setlocale(LC_ALL, "");
 392     pa_log_set_maximal_level(PA_LOG_INFO);
 393     pa_log_set_ident("pulseaudio");
 394
 395     conf = pa_daemon_conf_new();
 396
 397     if (pa_daemon_conf_load(conf, NULL) < 0)
 398         goto finish;
 399
 400     if (pa_daemon_conf_env(conf) < 0)
 401         goto finish;
 402
 403     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 404         pa_log("Failed to parse command line.");
 405         goto finish;
 406     }
 407
 408     pa_log_set_maximal_level(conf->log_level);
 409     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);
 410
 411     if (suid_root) {
 412         /* Ok, we're suid root, so let's better not enable high prio
 413          * or RT by default */
 414
 415         allow_high_priority = allow_realtime = FALSE;
 416
 417 #ifdef HAVE_POLKIT
 418         if (conf->high_priority) {
 419             if (pa_polkit_check("org.pulseaudio.acquire-high-priority") > 0) {
 420                 pa_log_info("PolicyKit grants us acquire-high-priority privilige.");
 421                 allow_high_priority = TRUE;
 422             } else
 423                 pa_log_info("PolicyKit refuses acquire-high-priority privilige.");
 424         }
 425
 426         if (conf->realtime_scheduling) {
 427             if (pa_polkit_check("org.pulseaudio.acquire-real-time") > 0) {
 428                 pa_log_info("PolicyKit grants us acquire-real-time privilige.");
 429                 allow_realtime = TRUE;
 430             } else
 431                 pa_log_info("PolicyKit refuses acquire-real-time privilige.");
 432         }
 433 #endif
 434
 435         if ((conf->high_priority || conf->realtime_scheduling) && pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) {
 436             pa_log_info("We're in the group '"PA_REALTIME_GROUP"', allowing real-time and high-priority scheduling.");
 437             allow_realtime = conf->realtime_scheduling;
 438             allow_high_priority = conf->high_priority;
 439         }
 440
 441         if (!allow_high_priority && !allow_realtime) {
 442
 443             /* OK, there's no further need to keep CAP_NICE. Hence
 444              * let's give it up early */
 445
 446             pa_drop_caps();
 447             pa_drop_root();
 448             suid_root = real_root = FALSE;
 449
 450             if (conf->high_priority || conf->realtime_scheduling)
 451                 pa_log_notice("Called SUID root and real-time/high-priority scheduling was requested in the configuration. However, we lack the necessary priviliges:\n"
 452                               "We are not in group '"PA_REALTIME_GROUP"' and PolicyKit refuse to grant us priviliges. Dropping SUID again.\n"
 453                               "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.");
 454         }
 455
 456     } else {
 457
 458         /* OK, we're a normal user, so let's allow the user evrything
 459          * he asks for, it's now the kernel's job to enforce limits,
 460          * not ours anymore */
 461         allow_high_priority = allow_realtime = TRUE;
 462     }
 463
 464     if (conf->high_priority && !allow_high_priority) {
 465         pa_log_info("High-priority scheduling enabled in configuration but now allowed by policy. Disabling forcibly.");
 466         conf->high_priority = FALSE;
 467     }
 468
 469     if (conf->realtime_scheduling && !allow_realtime) {
 470         pa_log_info("Real-time scheduling enabled in configuration but now allowed by policy. Disabling forcibly.");
 471         conf->realtime_scheduling = FALSE;
 472     }
 473
 474     if (conf->high_priority && conf->cmd == PA_CMD_DAEMON)
 475         pa_raise_priority(conf->nice_level);
 476
 477     if (suid_root) {
 478         pa_bool_t drop;
 479
 480         drop = conf->cmd != PA_CMD_DAEMON || !conf->realtime_scheduling;
 481
 482 #ifdef RLIMIT_RTPRIO
 483         if (!drop) {
 484
 485             /* At this point we still have CAP_NICE if we were loaded
 486              * SUID root. If possible let's acquire RLIMIT_RTPRIO
 487              * instead and give CAP_NICE up. */
 488
 489             const pa_rlimit rl = { 9, TRUE };
 490
 491             if (set_one_rlimit(&rl, RLIMIT_RTPRIO, "RLIMIT_RTPRIO") >= 0) {
 492                 pa_log_info("Successfully increased RLIMIT_RTPRIO, giving up CAP_NICE.");
 493                 drop = TRUE;
 494             } else
 495                 pa_log_warn("RLIMIT_RTPRIO failed: %s", pa_cstrerror(errno));
 496         }
 497 #endif
 498
 499         if (drop)  {
 500             pa_drop_caps();
 501             pa_drop_root();
 502             suid_root = real_root = FALSE;
 503         }
 504     }
 505
 506     LTDL_SET_PRELOADED_SYMBOLS();
 507     pa_ltdl_init();
 508     ltdl_init = TRUE;
 509
 510     if (conf->dl_search_path)
 511         lt_dlsetsearchpath(conf->dl_search_path);
 512
 513 #ifdef OS_IS_WIN32
 514     {
 515         WSADATA data;
 516         WSAStartup(MAKEWORD(2, 0), &data);
 517     }
 518 #endif
 519
 520     pa_random_seed();
 521
 522     switch (conf->cmd) {
 523         case PA_CMD_DUMP_MODULES:
 524             pa_dump_modules(conf, argc-d, argv+d);
 525             retval = 0;
 526             goto finish;
 527
 528         case PA_CMD_DUMP_CONF: {
 529             s = pa_daemon_conf_dump(conf);
 530             fputs(s, stdout);
 531             pa_xfree(s);
 532             retval = 0;
 533             goto finish;
 534         }
 535
 536         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 537             int i;
 538
 539             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 540                 if (pa_resample_method_supported(i))
 541                     printf("%s\n", pa_resample_method_to_string(i));
 542
 543             goto finish;
 544         }
 545
 546         case PA_CMD_HELP :
 547             pa_cmdline_help(argv[0]);
 548             retval = 0;
 549             goto finish;
 550
 551         case PA_CMD_VERSION :
 552             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 553             retval = 0;
 554             goto finish;
 555
 556         case PA_CMD_CHECK: {
 557             pid_t pid;
 558
 559             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 560                 pa_log_info("Daemon not running");
 561             else {
 562                 pa_log_info("Daemon running as PID %u", pid);
 563                 retval = 0;
 564             }
 565
 566             goto finish;
 567
 568         }
 569         case PA_CMD_KILL:
 570
 571             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 572                 pa_log("Failed to kill daemon.");
 573             else
 574                 retval = 0;
 575
 576             goto finish;
 577
 578         case PA_CMD_CLEANUP_SHM:
 579
 580             if (pa_shm_cleanup() >= 0)
 581                 retval = 0;
 582
 583             goto finish;
 584
 585         default:
 586             pa_assert(conf->cmd == PA_CMD_DAEMON);
 587     }
 588
 589     if (real_root && !conf->system_instance)
 590         pa_log_warn("This program is not intended to be run as root (unless --system is specified).");
 591     else if (!real_root && conf->system_instance) {
 592         pa_log("Root priviliges required.");
 593         goto finish;
 594     }
 595
 596     if (conf->daemonize) {
 597         pid_t child;
 598         int tty_fd;
 599
 600         if (pa_stdio_acquire() < 0) {
 601             pa_log("Failed to acquire stdio.");
 602             goto finish;
 603         }
 604
 605 #ifdef HAVE_FORK
 606         if (pipe(daemon_pipe) < 0) {
 607             pa_log("Failed to create pipe.");
 608             goto finish;
 609         }
 610
 611         if ((child = fork()) < 0) {
 612             pa_log("fork() failed: %s", pa_cstrerror(errno));
 613             goto finish;
 614         }
 615
 616         if (child != 0) {
 617             /* Father */
 618
 619             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 620             daemon_pipe[1] = -1;
 621
 622             if (pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL) != sizeof(retval)) {
 623                 pa_log("read() failed: %s", pa_cstrerror(errno));
 624                 retval = 1;
 625             }
 626
 627             if (retval)
 628                 pa_log("daemon startup failed.");
 629             else
 630                 pa_log_info("daemon startup successful.");
 631
 632             goto finish;
 633         }
 634
 635         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 636         daemon_pipe[0] = -1;
 637 #endif
 638
 639         if (conf->auto_log_target)
 640             pa_log_set_target(PA_LOG_SYSLOG, NULL);
 641
 642 #ifdef HAVE_SETSID
 643         setsid();
 644 #endif
 645 #ifdef HAVE_SETPGID
 646         setpgid(0,0);
 647 #endif
 648
 649 #ifndef OS_IS_WIN32
 650         pa_close(0);
 651         pa_close(1);
 652         pa_close(2);
 653
 654         open("/dev/null", O_RDONLY);
 655         open("/dev/null", O_WRONLY);
 656         open("/dev/null", O_WRONLY);
 657 #else
 658         FreeConsole();
 659 #endif
 660
 661 #ifdef SIGTTOU
 662         signal(SIGTTOU, SIG_IGN);
 663 #endif
 664 #ifdef SIGTTIN
 665         signal(SIGTTIN, SIG_IGN);
 666 #endif
 667 #ifdef SIGTSTP
 668         signal(SIGTSTP, SIG_IGN);
 669 #endif
 670
 671 #ifdef TIOCNOTTY
 672         if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
 673             ioctl(tty_fd, TIOCNOTTY, (char*) 0);
 674             pa_assert_se(pa_close(tty_fd) == 0);
 675         }
 676 #endif
 677     }
 678
 679     pa_assert_se(chdir("/") == 0);
 680     umask(0022);
 681
 682     if (conf->system_instance) {
 683         if (change_user() < 0)
 684             goto finish;
 685     } else if (create_runtime_dir() < 0)
 686         goto finish;
 687
 688     if (conf->use_pid_file) {
 689         if (pa_pid_file_create() < 0) {
 690             pa_log("pa_pid_file_create() failed.");
 691 #ifdef HAVE_FORK
 692             if (conf->daemonize)
 693                 pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 694 #endif
 695             goto finish;
 696         }
 697
 698         valid_pid_file = 1;
 699     }
 700
 701 #ifdef HAVE_SYS_RESOURCE_H
 702     set_all_rlimits(conf);
 703 #endif
 704
 705 #ifdef SIGPIPE
 706     signal(SIGPIPE, SIG_IGN);
 707 #endif
 708
 709     pa_log_info("This is PulseAudio " PACKAGE_VERSION);
 710     pa_log_info("Page size is %lu bytes", (unsigned long) PA_PAGE_SIZE);
 711
 712     if (pa_rtclock_hrtimer())
 713         pa_log_info("Fresh high-resolution timers available! Bon appetit!");
 714     else
 715         pa_log_info("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!");
 716
 717 #ifdef SIGRTMIN
 718     /* Valgrind uses SIGRTMAX. To easy debugging we don't use it here */
 719     pa_rtsig_configure(SIGRTMIN, SIGRTMAX-1);
 720 #endif
 721
 722     pa_assert_se(mainloop = pa_mainloop_new());
 723
 724     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm))) {
 725         pa_log("pa_core_new() failed.");
 726         goto finish;
 727     }
 728
 729     c->is_system_instance = !!conf->system_instance;
 730     c->default_sample_spec = conf->default_sample_spec;
 731     c->default_n_fragments = conf->default_n_fragments;
 732     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 733     c->exit_idle_time = conf->exit_idle_time;
 734     c->module_idle_time = conf->module_idle_time;
 735     c->scache_idle_time = conf->scache_idle_time;
 736     c->resample_method = conf->resample_method;
 737     c->realtime_priority = conf->realtime_priority;
 738     c->realtime_scheduling = !!conf->realtime_scheduling;
 739     c->disable_remixing = !!conf->disable_remixing;
 740
 741     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 742     pa_signal_new(SIGINT, signal_callback, c);
 743     pa_signal_new(SIGTERM, signal_callback, c);
 744
 745 #ifdef SIGUSR1
 746     pa_signal_new(SIGUSR1, signal_callback, c);
 747 #endif
 748 #ifdef SIGUSR2
 749     pa_signal_new(SIGUSR2, signal_callback, c);
 750 #endif
 751 #ifdef SIGHUP
 752     pa_signal_new(SIGHUP, signal_callback, c);
 753 #endif
 754
 755 #ifdef OS_IS_WIN32
 756     pa_assert_se(timer = pa_mainloop_get_api(mainloop)->time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&tv), message_cb, NULL));
 757 #endif
 758
 759     if (conf->daemonize)
 760         c->running_as_daemon = TRUE;
 761
 762     oil_init();
 763
 764     if (!conf->no_cpu_limit)
 765         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 766
 767     buf = pa_strbuf_new();
 768     if (conf->default_script_file)
 769         r = pa_cli_command_execute_file(c, conf->default_script_file, buf, &conf->fail);
 770
 771     if (r >= 0)
 772         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 773     pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 774     pa_xfree(s);
 775
 776     /* We completed the initial module loading, so let's disable it
 777      * from now on, if requested */
 778     c->disallow_module_loading = !!conf->disallow_module_loading;
 779
 780     if (r < 0 && conf->fail) {
 781         pa_log("failed to initialize daemon.");
 782 #ifdef HAVE_FORK
 783         if (conf->daemonize)
 784             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 785 #endif
 786     } else if (!c->modules || pa_idxset_size(c->modules) == 0) {
 787         pa_log("daemon startup without any loaded modules, refusing to work.");
 788 #ifdef HAVE_FORK
 789         if (conf->daemonize)
 790             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 791 #endif
 792     } else {
 793
 794         retval = 0;
 795 #ifdef HAVE_FORK
 796         if (conf->daemonize)
 797             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 798 #endif
 799
 800         if (c->default_sink_name &&
 801             pa_namereg_get(c, c->default_sink_name, PA_NAMEREG_SINK, 1) == NULL) {
 802             pa_log_error("%s : Fatal error. Default sink name (%s) does not exist in name register.", __FILE__, c->default_sink_name);
 803             retval = 1;
 804         } else {
 805             pa_log_info("Daemon startup complete.");
 806             if (pa_mainloop_run(mainloop, &retval) < 0)
 807                 retval = 1;
 808             pa_log_info("Daemon shutdown initiated.");
 809         }
 810     }
 811
 812 #ifdef OS_IS_WIN32
 813     pa_mainloop_get_api(mainloop)->time_free(timer);
 814 #endif
 815
 816     pa_core_unref(c);
 817
 818     if (!conf->no_cpu_limit)
 819         pa_cpu_limit_done();
 820
 821     pa_signal_done();
 822
 823     pa_log_info("Daemon terminated.");
 824
 825 finish:
 826
 827     if (mainloop)
 828         pa_mainloop_free(mainloop);
 829
 830     if (conf)
 831         pa_daemon_conf_free(conf);
 832
 833     if (valid_pid_file)
 834         pa_pid_file_remove();
 835
 836     pa_close_pipe(daemon_pipe);
 837
 838 #ifdef OS_IS_WIN32
 839     WSACleanup();
 840 #endif
 841
 842     if (ltdl_init)
 843         pa_ltdl_done();
 844
 845 #ifdef HAVE_DBUS
 846     dbus_shutdown();
 847 #endif
 848
 849     return retval;
 850 }