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