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("USERNAME", PA_SYSTEM_USER);
 246     set_env("LOGNAME", PA_SYSTEM_USER);
 247     set_env("HOME", PA_SYSTEM_RUNTIME_PATH);
 248
 249     /* Relevant for pa_runtime_path() */
 250     set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
 251     set_env("PULSE_CONFIG_PATH", PA_SYSTEM_RUNTIME_PATH);
 252
 253     pa_log_info("Successfully dropped root privileges.");
 254
 255     return 0;
 256 }
 257
 258 #else /* HAVE_PWD_H && HAVE_GRP_H */
 259
 260 static int change_user(void) {
 261     pa_log("System wide mode unsupported on this platform.");
 262     return -1;
 263 }
 264
 265 #endif /* HAVE_PWD_H && HAVE_GRP_H */
 266
 267 static int create_runtime_dir(void) {
 268     char fn[PATH_MAX];
 269
 270     pa_runtime_path(NULL, fn, sizeof(fn));
 271
 272     /* This function is called only when the daemon is started in
 273      * per-user mode. We create the runtime directory somewhere in
 274      * /tmp/ with the current UID/GID */
 275
 276     if (pa_make_secure_dir(fn, 0700, (uid_t)-1, (gid_t)-1) < 0) {
 277         pa_log("Failed to create '%s': %s", fn, pa_cstrerror(errno));
 278         return -1;
 279     }
 280
 281     return 0;
 282 }
 283
 284 #ifdef HAVE_SYS_RESOURCE_H
 285
 286 static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
 287     struct rlimit rl;
 288     pa_assert(r);
 289
 290     if (!r->is_set)
 291         return 0;
 292
 293     rl.rlim_cur = rl.rlim_max = r->value;
 294
 295     if (setrlimit(resource, &rl) < 0) {
 296         pa_log_warn("setrlimit(%s, (%u, %u)) failed: %s", name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
 297         return -1;
 298     }
 299
 300     return 0;
 301 }
 302
 303 static void set_all_rlimits(const pa_daemon_conf *conf) {
 304     set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
 305     set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
 306     set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
 307     set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
 308     set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
 309     set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
 310 #ifdef RLIMIT_NPROC
 311     set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
 312 #endif
 313 #ifdef RLIMIT_MEMLOCK
 314     set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
 315 #endif
 316 #ifdef RLIMIT_NICE
 317     set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
 318 #endif
 319 #ifdef RLIMIT_RTPRIO
 320     set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
 321 #endif
 322 }
 323 #endif
 324
 325 int main(int argc, char *argv[]) {
 326     pa_core *c = NULL;
 327     pa_strbuf *buf = NULL;
 328     pa_daemon_conf *conf = NULL;
 329     pa_mainloop *mainloop = NULL;
 330     char *s;
 331     int r = 0, retval = 1, d = 0;
 332     int daemon_pipe[2] = { -1, -1 };
 333     pa_bool_t suid_root, real_root;
 334     int valid_pid_file = 0;
 335     gid_t gid = (gid_t) -1;
 336     pa_bool_t allow_realtime, allow_high_priority;
 337     pa_bool_t ltdl_init = FALSE;
 338
 339 #ifdef OS_IS_WIN32
 340     pa_time_event *timer;
 341     struct timeval tv;
 342 #endif
 343
 344
 345 #if defined(__linux__) && defined(__OPTIMIZE__)
 346     /*
 347        Disable lazy relocations to make usage of external libraries
 348        more deterministic for our RT threads. We abuse __OPTIMIZE__ as
 349        a check whether we are a debug build or not.
 350     */
 351
 352     if (!getenv("LD_BIND_NOW")) {
 353         char *rp;
 354
 355         /* We have to execute ourselves, because the libc caches the
 356          * value of $LD_BIND_NOW on initialization. */
 357
 358         putenv(pa_xstrdup("LD_BIND_NOW=1"));
 359         pa_assert_se(rp = pa_readlink("/proc/self/exe"));
 360         pa_assert_se(execv(rp, argv) == 0);
 361     }
 362 #endif
 363
 364 #ifdef HAVE_GETUID
 365     real_root = getuid() == 0;
 366     suid_root = !real_root && geteuid() == 0;
 367 #else
 368     real_root = FALSE;
 369     suid_root = FALSE;
 370 #endif
 371
 372     if (suid_root) {
 373         /* Drop all capabilities except CAP_SYS_NICE  */
 374         pa_limit_caps();
 375
 376         /* Drop priviliges, but keep CAP_SYS_NICE */
 377         pa_drop_root();
 378
 379         /* After dropping root, the effective set is reset, hence,
 380          * let's raise it again */
 381         pa_limit_caps();
 382
 383         /* When capabilities are not supported we will not be able to
 384          * aquire RT sched anymore. But yes, that's the way it is. It
 385          * is just too risky tun let PA run as root all the time. */
 386     }
 387
 388     /* At this point, we are a normal user, possibly with CAP_NICE if
 389      * we were started SUID. If we are started as normal root, than we
 390      * still are normal root. */
 391
 392     setlocale(LC_ALL, "");
 393     pa_log_set_maximal_level(PA_LOG_INFO);
 394     pa_log_set_ident("pulseaudio");
 395
 396     conf = pa_daemon_conf_new();
 397
 398     if (pa_daemon_conf_load(conf, NULL) < 0)
 399         goto finish;
 400
 401     if (pa_daemon_conf_env(conf) < 0)
 402         goto finish;
 403
 404     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 405         pa_log("Failed to parse command line.");
 406         goto finish;
 407     }
 408
 409     pa_log_set_maximal_level(conf->log_level);
 410     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);
 411
 412     if (suid_root) {
 413         /* Ok, we're suid root, so let's better not enable high prio
 414          * or RT by default */
 415
 416         allow_high_priority = allow_realtime = FALSE;
 417
 418 #ifdef HAVE_POLKIT
 419         if (conf->high_priority) {
 420             if (pa_polkit_check("org.pulseaudio.acquire-high-priority") > 0) {
 421                 pa_log_info("PolicyKit grants us acquire-high-priority privilige.");
 422                 allow_high_priority = TRUE;
 423             } else
 424                 pa_log_info("PolicyKit refuses acquire-high-priority privilige.");
 425         }
 426
 427         if (conf->realtime_scheduling) {
 428             if (pa_polkit_check("org.pulseaudio.acquire-real-time") > 0) {
 429                 pa_log_info("PolicyKit grants us acquire-real-time privilige.");
 430                 allow_realtime = TRUE;
 431             } else
 432                 pa_log_info("PolicyKit refuses acquire-real-time privilige.");
 433         }
 434 #endif
 435
 436         if ((conf->high_priority || conf->realtime_scheduling) && pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) {
 437             pa_log_info("We're in the group '"PA_REALTIME_GROUP"', allowing real-time and high-priority scheduling.");
 438             allow_realtime = conf->realtime_scheduling;
 439             allow_high_priority = conf->high_priority;
 440         }
 441
 442         if (!allow_high_priority && !allow_realtime) {
 443
 444             /* OK, there's no further need to keep CAP_NICE. Hence
 445              * let's give it up early */
 446
 447             pa_drop_caps();
 448             pa_drop_root();
 449             suid_root = real_root = FALSE;
 450
 451             if (conf->high_priority || conf->realtime_scheduling)
 452                 pa_log_notice("Called SUID root and real-time/high-priority scheduling was requested in the configuration. However, we lack the necessary priviliges:\n"
 453                               "We are not in group '"PA_REALTIME_GROUP"' and PolicyKit refuse to grant us priviliges. Dropping SUID again.\n"
 454                               "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.");
 455         }
 456
 457     } else {
 458
 459         /* OK, we're a normal user, so let's allow the user evrything
 460          * he asks for, it's now the kernel's job to enforce limits,
 461          * not ours anymore */
 462         allow_high_priority = allow_realtime = TRUE;
 463     }
 464
 465     if (conf->high_priority && !allow_high_priority) {
 466         pa_log_info("High-priority scheduling enabled in configuration but now allowed by policy. Disabling forcibly.");
 467         conf->high_priority = FALSE;
 468     }
 469
 470     if (conf->realtime_scheduling && !allow_realtime) {
 471         pa_log_info("Real-time scheduling enabled in configuration but now allowed by policy. Disabling forcibly.");
 472         conf->realtime_scheduling = FALSE;
 473     }
 474
 475     if (conf->high_priority && conf->cmd == PA_CMD_DAEMON)
 476         pa_raise_priority(conf->nice_level);
 477
 478     if (suid_root) {
 479         pa_bool_t drop;
 480
 481         drop = conf->cmd != PA_CMD_DAEMON || !conf->realtime_scheduling;
 482
 483 #ifdef RLIMIT_RTPRIO
 484         if (!drop) {
 485
 486             /* At this point we still have CAP_NICE if we were loaded
 487              * SUID root. If possible let's acquire RLIMIT_RTPRIO
 488              * instead and give CAP_NICE up. */
 489
 490             const pa_rlimit rl = { 9, TRUE };
 491
 492             if (set_one_rlimit(&rl, RLIMIT_RTPRIO, "RLIMIT_RTPRIO") >= 0) {
 493                 pa_log_info("Successfully increased RLIMIT_RTPRIO, giving up CAP_NICE.");
 494                 drop = TRUE;
 495             } else
 496                 pa_log_warn("RLIMIT_RTPRIO failed: %s", pa_cstrerror(errno));
 497         }
 498 #endif
 499
 500         if (drop)  {
 501             pa_drop_caps();
 502             pa_drop_root();
 503             suid_root = real_root = FALSE;
 504         }
 505     }
 506
 507     LTDL_SET_PRELOADED_SYMBOLS();
 508     pa_ltdl_init();
 509     ltdl_init = TRUE;
 510
 511     if (conf->dl_search_path)
 512         lt_dlsetsearchpath(conf->dl_search_path);
 513
 514 #ifdef OS_IS_WIN32
 515     {
 516         WSADATA data;
 517         WSAStartup(MAKEWORD(2, 0), &data);
 518     }
 519 #endif
 520
 521     pa_random_seed();
 522
 523     switch (conf->cmd) {
 524         case PA_CMD_DUMP_MODULES:
 525             pa_dump_modules(conf, argc-d, argv+d);
 526             retval = 0;
 527             goto finish;
 528
 529         case PA_CMD_DUMP_CONF: {
 530             s = pa_daemon_conf_dump(conf);
 531             fputs(s, stdout);
 532             pa_xfree(s);
 533             retval = 0;
 534             goto finish;
 535         }
 536
 537         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 538             int i;
 539
 540             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 541                 if (pa_resample_method_supported(i))
 542                     printf("%s\n", pa_resample_method_to_string(i));
 543
 544             goto finish;
 545         }
 546
 547         case PA_CMD_HELP :
 548             pa_cmdline_help(argv[0]);
 549             retval = 0;
 550             goto finish;
 551
 552         case PA_CMD_VERSION :
 553             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 554             retval = 0;
 555             goto finish;
 556
 557         case PA_CMD_CHECK: {
 558             pid_t pid;
 559
 560             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 561                 pa_log_info("Daemon not running");
 562             else {
 563                 pa_log_info("Daemon running as PID %u", pid);
 564                 retval = 0;
 565             }
 566
 567             goto finish;
 568
 569         }
 570         case PA_CMD_KILL:
 571
 572             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 573                 pa_log("Failed to kill daemon.");
 574             else
 575                 retval = 0;
 576
 577             goto finish;
 578
 579         case PA_CMD_CLEANUP_SHM:
 580
 581             if (pa_shm_cleanup() >= 0)
 582                 retval = 0;
 583
 584             goto finish;
 585
 586         default:
 587             pa_assert(conf->cmd == PA_CMD_DAEMON);
 588     }
 589
 590     if (real_root && !conf->system_instance)
 591         pa_log_warn("This program is not intended to be run as root (unless --system is specified).");
 592     else if (!real_root && conf->system_instance) {
 593         pa_log("Root priviliges required.");
 594         goto finish;
 595     }
 596
 597     if (conf->daemonize) {
 598         pid_t child;
 599         int tty_fd;
 600
 601         if (pa_stdio_acquire() < 0) {
 602             pa_log("Failed to acquire stdio.");
 603             goto finish;
 604         }
 605
 606 #ifdef HAVE_FORK
 607         if (pipe(daemon_pipe) < 0) {
 608             pa_log("Failed to create pipe.");
 609             goto finish;
 610         }
 611
 612         if ((child = fork()) < 0) {
 613             pa_log("fork() failed: %s", pa_cstrerror(errno));
 614             goto finish;
 615         }
 616
 617         if (child != 0) {
 618             /* Father */
 619
 620             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 621             daemon_pipe[1] = -1;
 622
 623             if (pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL) != sizeof(retval)) {
 624                 pa_log("read() failed: %s", pa_cstrerror(errno));
 625                 retval = 1;
 626             }
 627
 628             if (retval)
 629                 pa_log("daemon startup failed.");
 630             else
 631                 pa_log_info("daemon startup successful.");
 632
 633             goto finish;
 634         }
 635
 636         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 637         daemon_pipe[0] = -1;
 638 #endif
 639
 640         if (conf->auto_log_target)
 641             pa_log_set_target(PA_LOG_SYSLOG, NULL);
 642
 643 #ifdef HAVE_SETSID
 644         setsid();
 645 #endif
 646 #ifdef HAVE_SETPGID
 647         setpgid(0,0);
 648 #endif
 649
 650 #ifndef OS_IS_WIN32
 651         pa_close(0);
 652         pa_close(1);
 653         pa_close(2);
 654
 655         open("/dev/null", O_RDONLY);
 656         open("/dev/null", O_WRONLY);
 657         open("/dev/null", O_WRONLY);
 658 #else
 659         FreeConsole();
 660 #endif
 661
 662 #ifdef SIGTTOU
 663         signal(SIGTTOU, SIG_IGN);
 664 #endif
 665 #ifdef SIGTTIN
 666         signal(SIGTTIN, SIG_IGN);
 667 #endif
 668 #ifdef SIGTSTP
 669         signal(SIGTSTP, SIG_IGN);
 670 #endif
 671
 672 #ifdef TIOCNOTTY
 673         if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
 674             ioctl(tty_fd, TIOCNOTTY, (char*) 0);
 675             pa_assert_se(pa_close(tty_fd) == 0);
 676         }
 677 #endif
 678     }
 679
 680     pa_assert_se(chdir("/") == 0);
 681     umask(0022);
 682
 683     if (conf->system_instance) {
 684         if (change_user() < 0)
 685             goto finish;
 686     } else if (create_runtime_dir() < 0)
 687         goto finish;
 688
 689     if (conf->use_pid_file) {
 690         if (pa_pid_file_create() < 0) {
 691             pa_log("pa_pid_file_create() failed.");
 692 #ifdef HAVE_FORK
 693             if (conf->daemonize)
 694                 pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 695 #endif
 696             goto finish;
 697         }
 698
 699         valid_pid_file = 1;
 700     }
 701
 702 #ifdef HAVE_SYS_RESOURCE_H
 703     set_all_rlimits(conf);
 704 #endif
 705
 706 #ifdef SIGPIPE
 707     signal(SIGPIPE, SIG_IGN);
 708 #endif
 709
 710     pa_log_info("This is PulseAudio " PACKAGE_VERSION);
 711     pa_log_info("Page size is %lu bytes", (unsigned long) PA_PAGE_SIZE);
 712
 713     if (pa_rtclock_hrtimer())
 714         pa_log_info("Fresh high-resolution timers available! Bon appetit!");
 715     else
 716         pa_log_info("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!");
 717
 718 #ifdef SIGRTMIN
 719     /* Valgrind uses SIGRTMAX. To easy debugging we don't use it here */
 720     pa_rtsig_configure(SIGRTMIN, SIGRTMAX-1);
 721 #endif
 722
 723     pa_assert_se(mainloop = pa_mainloop_new());
 724
 725     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm))) {
 726         pa_log("pa_core_new() failed.");
 727         goto finish;
 728     }
 729
 730     c->is_system_instance = !!conf->system_instance;
 731     c->default_sample_spec = conf->default_sample_spec;
 732     c->default_n_fragments = conf->default_n_fragments;
 733     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 734     c->exit_idle_time = conf->exit_idle_time;
 735     c->module_idle_time = conf->module_idle_time;
 736     c->scache_idle_time = conf->scache_idle_time;
 737     c->resample_method = conf->resample_method;
 738     c->realtime_priority = conf->realtime_priority;
 739     c->realtime_scheduling = !!conf->realtime_scheduling;
 740     c->disable_remixing = !!conf->disable_remixing;
 741
 742     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 743     pa_signal_new(SIGINT, signal_callback, c);
 744     pa_signal_new(SIGTERM, signal_callback, c);
 745
 746 #ifdef SIGUSR1
 747     pa_signal_new(SIGUSR1, signal_callback, c);
 748 #endif
 749 #ifdef SIGUSR2
 750     pa_signal_new(SIGUSR2, signal_callback, c);
 751 #endif
 752 #ifdef SIGHUP
 753     pa_signal_new(SIGHUP, signal_callback, c);
 754 #endif
 755
 756 #ifdef OS_IS_WIN32
 757     pa_assert_se(timer = pa_mainloop_get_api(mainloop)->time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&tv), message_cb, NULL));
 758 #endif
 759
 760     if (conf->daemonize)
 761         c->running_as_daemon = TRUE;
 762
 763     oil_init();
 764
 765     if (!conf->no_cpu_limit)
 766         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 767
 768     buf = pa_strbuf_new();
 769     if (conf->default_script_file)
 770         r = pa_cli_command_execute_file(c, conf->default_script_file, buf, &conf->fail);
 771
 772     if (r >= 0)
 773         r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
 774     pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
 775     pa_xfree(s);
 776
 777     /* We completed the initial module loading, so let's disable it
 778      * from now on, if requested */
 779     c->disallow_module_loading = !!conf->disallow_module_loading;
 780
 781     if (r < 0 && conf->fail) {
 782         pa_log("Failed to initialize daemon.");
 783 #ifdef HAVE_FORK
 784         if (conf->daemonize)
 785             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 786 #endif
 787     } else if (!c->modules || pa_idxset_size(c->modules) == 0) {
 788         pa_log("daemon startup without any loaded modules, refusing to work.");
 789 #ifdef HAVE_FORK
 790         if (conf->daemonize)
 791             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 792 #endif
 793     } else {
 794
 795         retval = 0;
 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 : Default sink name (%s) does not exist in name register.", __FILE__, c->default_sink_name);
 800             retval = !!conf->fail;
 801         }
 802
 803 #ifdef HAVE_FORK
 804         if (conf->daemonize)
 805             pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
 806 #endif
 807
 808         if (!retval) {
 809             pa_log_info("Daemon startup complete.");
 810             if (pa_mainloop_run(mainloop, &retval) < 0)
 811                 retval = 1;
 812             pa_log_info("Daemon shutdown initiated.");
 813         }
 814     }
 815
 816 #ifdef OS_IS_WIN32
 817     pa_mainloop_get_api(mainloop)->time_free(timer);
 818 #endif
 819
 820     pa_core_unref(c);
 821
 822     if (!conf->no_cpu_limit)
 823         pa_cpu_limit_done();
 824
 825     pa_signal_done();
 826
 827     pa_log_info("Daemon terminated.");
 828
 829 finish:
 830
 831     if (mainloop)
 832         pa_mainloop_free(mainloop);
 833
 834     if (conf)
 835         pa_daemon_conf_free(conf);
 836
 837     if (valid_pid_file)
 838         pa_pid_file_remove();
 839
 840     pa_close_pipe(daemon_pipe);
 841
 842 #ifdef OS_IS_WIN32
 843     WSACleanup();
 844 #endif
 845
 846     if (ltdl_init)
 847         pa_ltdl_done();
 848
 849 #ifdef HAVE_DBUS
 850     dbus_shutdown();
 851 #endif
 852
 853     return retval;
 854 }