src/daemon/main.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as published
   9   by the Free Software Foundation; either version 2.1 of the License,
  10   or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <unistd.h>
  28 #include <errno.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <signal.h>
  33 #include <stddef.h>
  34 #include <ltdl.h>
  35 #include <limits.h>
  36 #include <fcntl.h>
  37 #include <unistd.h>
  38 #include <locale.h>
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41
  42 #ifdef HAVE_SYS_MMAN_H
  43 #include <sys/mman.h>
  44 #endif
  45
  46 #ifdef HAVE_SYS_IOCTL_H
  47 #include <sys/ioctl.h>
  48 #endif
  49
  50 #ifdef HAVE_PWD_H
  51 #include <pwd.h>
  52 #endif
  53 #ifdef HAVE_GRP_H
  54 #include <grp.h>
  55 #endif
  56
  57 #ifdef HAVE_LIBWRAP
  58 #include <syslog.h>
  59 #include <tcpd.h>
  60 #endif
  61
  62 #ifdef HAVE_DBUS
  63 #include <dbus/dbus.h>
  64 #endif
  65
  66 #include <pulse/client-conf.h>
  67 #ifdef HAVE_X11
  68 #include <pulse/client-conf-x11.h>
  69 #endif
  70 #include <pulse/mainloop.h>
  71 #include <pulse/mainloop-signal.h>
  72 #include <pulse/timeval.h>
  73 #include <pulse/xmalloc.h>
  74 #include <pulse/i18n.h>
  75
  76 #include <pulsecore/lock-autospawn.h>
  77 #include <pulsecore/winsock.h>
  78 #include <pulsecore/core-error.h>
  79 #include <pulsecore/core-rtclock.h>
  80 #include <pulsecore/core.h>
  81 #include <pulsecore/memblock.h>
  82 #include <pulsecore/module.h>
  83 #include <pulsecore/cli-command.h>
  84 #include <pulsecore/log.h>
  85 #include <pulsecore/core-util.h>
  86 #include <pulsecore/sioman.h>
  87 #include <pulsecore/cli-text.h>
  88 #include <pulsecore/pid.h>
  89 #include <pulsecore/namereg.h>
  90 #include <pulsecore/random.h>
  91 #include <pulsecore/macro.h>
  92 #include <pulsecore/mutex.h>
  93 #include <pulsecore/thread.h>
  94 #include <pulsecore/once.h>
  95 #include <pulsecore/shm.h>
  96 #include <pulsecore/memtrap.h>
  97 #ifdef HAVE_DBUS
  98 #include <pulsecore/dbus-shared.h>
  99 #endif
 100 #include <pulsecore/cpu-arm.h>
 101 #include <pulsecore/cpu-x86.h>
 102
 103 #include "cmdline.h"
 104 #include "cpulimit.h"
 105 #include "daemon-conf.h"
 106 #include "dumpmodules.h"
 107 #include "caps.h"
 108 #include "ltdl-bind-now.h"
 109 #include "server-lookup.h"
 110
 111 #ifdef HAVE_LIBWRAP
 112 /* Only one instance of these variables */
 113 int allow_severity = LOG_INFO;
 114 int deny_severity = LOG_WARNING;
 115 #endif
 116
 117 #ifdef HAVE_OSS_WRAPPER
 118 /* padsp looks for this symbol in the running process and disables
 119  * itself if it finds it and it is set to 7 (which is actually a bit
 120  * mask). For details see padsp. */
 121 int __padsp_disabled__ = 7;
 122 #endif
 123
 124 #ifdef OS_IS_WIN32
 125
 126 static void message_cb(pa_mainloop_api*a, pa_time_event*e, const struct timeval *tv, void *userdata) {
 127     MSG msg;
 128     struct timeval tvnext;
 129
 130     while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
 131         if (msg.message == WM_QUIT)
 132             raise(SIGTERM);
 133         else {
 134             TranslateMessage(&msg);
 135             DispatchMessage(&msg);
 136         }
 137     }
 138
 139     pa_timeval_add(pa_gettimeofday(&tvnext), 100000);
 140     a->rtclock_time_restart(e, &tvnext);
 141 }
 142
 143 #endif
 144
 145 static void signal_callback(pa_mainloop_api*m, pa_signal_event *e, int sig, void *userdata) {
 146     pa_log_info(_("Got signal %s."), pa_sig2str(sig));
 147
 148     switch (sig) {
 149 #ifdef SIGUSR1
 150         case SIGUSR1:
 151             pa_module_load(userdata, "module-cli", NULL);
 152             break;
 153 #endif
 154
 155 #ifdef SIGUSR2
 156         case SIGUSR2:
 157             pa_module_load(userdata, "module-cli-protocol-unix", NULL);
 158             break;
 159 #endif
 160
 161 #ifdef SIGHUP
 162         case SIGHUP: {
 163             char *c = pa_full_status_string(userdata);
 164             pa_log_notice("%s", c);
 165             pa_xfree(c);
 166             return;
 167         }
 168 #endif
 169
 170         case SIGINT:
 171         case SIGTERM:
 172         default:
 173             pa_log_info(_("Exiting."));
 174             m->quit(m, 1);
 175             break;
 176     }
 177 }
 178
 179 #if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
 180
 181 static int change_user(void) {
 182     struct passwd *pw;
 183     struct group * gr;
 184     int r;
 185
 186     /* This function is called only in system-wide mode. It creates a
 187      * runtime dir in /var/run/ with proper UID/GID and drops privs
 188      * afterwards. */
 189
 190     if (!(pw = getpwnam(PA_SYSTEM_USER))) {
 191         pa_log(_("Failed to find user '%s'."), PA_SYSTEM_USER);
 192         return -1;
 193     }
 194
 195     if (!(gr = getgrnam(PA_SYSTEM_GROUP))) {
 196         pa_log(_("Failed to find group '%s'."), PA_SYSTEM_GROUP);
 197         return -1;
 198     }
 199
 200     pa_log_info(_("Found user '%s' (UID %lu) and group '%s' (GID %lu)."),
 201                 PA_SYSTEM_USER, (unsigned long) pw->pw_uid,
 202                 PA_SYSTEM_GROUP, (unsigned long) gr->gr_gid);
 203
 204     if (pw->pw_gid != gr->gr_gid) {
 205         pa_log(_("GID of user '%s' and of group '%s' don't match."), PA_SYSTEM_USER, PA_SYSTEM_GROUP);
 206         return -1;
 207     }
 208
 209     if (strcmp(pw->pw_dir, PA_SYSTEM_RUNTIME_PATH) != 0)
 210         pa_log_warn(_("Home directory of user '%s' is not '%s', ignoring."), PA_SYSTEM_USER, PA_SYSTEM_RUNTIME_PATH);
 211
 212     if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH, 0755, pw->pw_uid, gr->gr_gid) < 0) {
 213         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_RUNTIME_PATH, pa_cstrerror(errno));
 214         return -1;
 215     }
 216
 217     if (pa_make_secure_dir(PA_SYSTEM_STATE_PATH, 0700, pw->pw_uid, gr->gr_gid) < 0) {
 218         pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_STATE_PATH, pa_cstrerror(errno));
 219         return -1;
 220     }
 221
 222     /* We don't create the config dir here, because we don't need to write to it */
 223
 224     if (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
 225         pa_log(_("Failed to change group list: %s"), pa_cstrerror(errno));
 226         return -1;
 227     }
 228
 229 #if defined(HAVE_SETRESGID)
 230     r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
 231 #elif defined(HAVE_SETEGID)
 232     if ((r = setgid(gr->gr_gid)) >= 0)
 233         r = setegid(gr->gr_gid);
 234 #elif defined(HAVE_SETREGID)
 235     r = setregid(gr->gr_gid, gr->gr_gid);
 236 #else
 237 #error "No API to drop privileges"
 238 #endif
 239
 240     if (r < 0) {
 241         pa_log(_("Failed to change GID: %s"), pa_cstrerror(errno));
 242         return -1;
 243     }
 244
 245 #if defined(HAVE_SETRESUID)
 246     r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
 247 #elif defined(HAVE_SETEUID)
 248     if ((r = setuid(pw->pw_uid)) >= 0)
 249         r = seteuid(pw->pw_uid);
 250 #elif defined(HAVE_SETREUID)
 251     r = setreuid(pw->pw_uid, pw->pw_uid);
 252 #else
 253 #error "No API to drop privileges"
 254 #endif
 255
 256     if (r < 0) {
 257         pa_log(_("Failed to change UID: %s"), pa_cstrerror(errno));
 258         return -1;
 259     }
 260
 261     pa_set_env("USER", PA_SYSTEM_USER);
 262     pa_set_env("USERNAME", PA_SYSTEM_USER);
 263     pa_set_env("LOGNAME", PA_SYSTEM_USER);
 264     pa_set_env("HOME", PA_SYSTEM_RUNTIME_PATH);
 265
 266     /* Relevant for pa_runtime_path() */
 267     if (!getenv("PULSE_RUNTIME_PATH"))
 268         pa_set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
 269
 270     if (!getenv("PULSE_CONFIG_PATH"))
 271         pa_set_env("PULSE_CONFIG_PATH", PA_SYSTEM_CONFIG_PATH);
 272
 273     if (!getenv("PULSE_STATE_PATH"))
 274         pa_set_env("PULSE_STATE_PATH", PA_SYSTEM_STATE_PATH);
 275
 276     pa_log_info(_("Successfully dropped root privileges."));
 277
 278     return 0;
 279 }
 280
 281 #else /* HAVE_PWD_H && HAVE_GRP_H */
 282
 283 static int change_user(void) {
 284     pa_log(_("System wide mode unsupported on this platform."));
 285     return -1;
 286 }
 287
 288 #endif /* HAVE_PWD_H && HAVE_GRP_H */
 289
 290 #ifdef HAVE_SYS_RESOURCE_H
 291
 292 static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
 293     struct rlimit rl;
 294     pa_assert(r);
 295
 296     if (!r->is_set)
 297         return 0;
 298
 299     rl.rlim_cur = rl.rlim_max = r->value;
 300
 301     if (setrlimit(resource, &rl) < 0) {
 302         pa_log_info(_("setrlimit(%s, (%u, %u)) failed: %s"), name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
 303         return -1;
 304     }
 305
 306     return 0;
 307 }
 308
 309 static void set_all_rlimits(const pa_daemon_conf *conf) {
 310     set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
 311     set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
 312     set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
 313     set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
 314 #ifdef RLIMIT_RSS
 315     set_one_rlimit(&conf->rlimit_rss, RLIMIT_RSS, "RLIMIT_RSS");
 316 #endif
 317 #ifdef RLIMIT_NPROC
 318     set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
 319 #endif
 320 #ifdef RLIMIT_NOFILE
 321     set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
 322 #endif
 323 #ifdef RLIMIT_MEMLOCK
 324     set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
 325 #endif
 326 #ifdef RLIMIT_AS
 327     set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
 328 #endif
 329 #ifdef RLIMIT_LOCKS
 330     set_one_rlimit(&conf->rlimit_locks, RLIMIT_LOCKS, "RLIMIT_LOCKS");
 331 #endif
 332 #ifdef RLIMIT_SIGPENDING
 333     set_one_rlimit(&conf->rlimit_sigpending, RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING");
 334 #endif
 335 #ifdef RLIMIT_MSGQUEUE
 336     set_one_rlimit(&conf->rlimit_msgqueue, RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE");
 337 #endif
 338 #ifdef RLIMIT_NICE
 339     set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
 340 #endif
 341 #ifdef RLIMIT_RTPRIO
 342     set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
 343 #endif
 344 #ifdef RLIMIT_RTTIME
 345     set_one_rlimit(&conf->rlimit_rttime, RLIMIT_RTTIME, "RLIMIT_RTTIME");
 346 #endif
 347 }
 348 #endif
 349
 350 static char *check_configured_address(void) {
 351     char *default_server = NULL;
 352     pa_client_conf *c = pa_client_conf_new();
 353
 354     pa_client_conf_load(c, NULL);
 355 #ifdef HAVE_X11
 356     pa_client_conf_from_x11(c, NULL);
 357 #endif
 358     pa_client_conf_env(c);
 359
 360     if (c->default_server && *c->default_server)
 361         default_server = pa_xstrdup(c->default_server);
 362
 363     pa_client_conf_free(c);
 364
 365     return default_server;
 366 }
 367
 368 #ifdef HAVE_DBUS
 369 static pa_dbus_connection *register_dbus_name(pa_core *c, DBusBusType bus, const char* name) {
 370     DBusError error;
 371     pa_dbus_connection *conn;
 372
 373     dbus_error_init(&error);
 374
 375     if (!(conn = pa_dbus_bus_get(c, bus, &error)) || dbus_error_is_set(&error)) {
 376         pa_log_warn("Unable to contact D-Bus: %s: %s", error.name, error.message);
 377         goto fail;
 378     }
 379
 380     if (dbus_bus_request_name(pa_dbus_connection_get(conn), name, DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) == DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
 381         pa_log_debug("Got %s!", name);
 382         return conn;
 383     }
 384
 385     if (dbus_error_is_set(&error))
 386         pa_log_error("Failed to acquire %s: %s: %s", name, error.name, error.message);
 387     else
 388         pa_log_error("D-Bus name %s already taken. Weird shit!", name);
 389
 390     /* PA cannot be started twice by the same user and hence we can
 391      * ignore mostly the case that a name is already taken. */
 392
 393 fail:
 394     if (conn)
 395         pa_dbus_connection_unref(conn);
 396
 397     dbus_error_free(&error);
 398     return NULL;
 399 }
 400 #endif
 401
 402 int main(int argc, char *argv[]) {
 403     pa_core *c = NULL;
 404     pa_strbuf *buf = NULL;
 405     pa_daemon_conf *conf = NULL;
 406     pa_mainloop *mainloop = NULL;
 407     char *s;
 408     char *configured_address;
 409     int r = 0, retval = 1, d = 0;
 410     pa_bool_t valid_pid_file = FALSE;
 411     pa_bool_t ltdl_init = FALSE;
 412     int passed_fd = -1;
 413     const char *e;
 414 #ifdef HAVE_FORK
 415     int daemon_pipe[2] = { -1, -1 };
 416 #endif
 417 #ifdef OS_IS_WIN32
 418     pa_time_event *win32_timer;
 419     struct timeval win32_tv;
 420 #endif
 421     int autospawn_fd = -1;
 422     pa_bool_t autospawn_locked = FALSE;
 423 #ifdef HAVE_DBUS
 424     pa_dbusobj_server_lookup *server_lookup = NULL; /* /org/pulseaudio/server_lookup */
 425     pa_dbus_connection *lookup_service_bus = NULL; /* Always the user bus. */
 426     pa_dbus_connection *server_bus = NULL; /* The bus where we reserve org.pulseaudio.Server, either the user or the system bus. */
 427     pa_bool_t start_server;
 428 #endif
 429
 430     pa_log_set_ident("pulseaudio");
 431     pa_log_set_level(PA_LOG_NOTICE);
 432     pa_log_set_flags(PA_LOG_COLORS|PA_LOG_PRINT_FILE|PA_LOG_PRINT_LEVEL, PA_LOG_RESET);
 433
 434 #if defined(__linux__) && defined(__OPTIMIZE__)
 435     /*
 436        Disable lazy relocations to make usage of external libraries
 437        more deterministic for our RT threads. We abuse __OPTIMIZE__ as
 438        a check whether we are a debug build or not. This all is
 439        admittedly a bit snake-oilish.
 440     */
 441
 442     if (!getenv("LD_BIND_NOW")) {
 443         char *rp;
 444         char *canonical_rp;
 445
 446         /* We have to execute ourselves, because the libc caches the
 447          * value of $LD_BIND_NOW on initialization. */
 448
 449         pa_set_env("LD_BIND_NOW", "1");
 450
 451         if ((canonical_rp = pa_realpath(PA_BINARY))) {
 452
 453             if ((rp = pa_readlink("/proc/self/exe"))) {
 454
 455                 if (pa_streq(rp, canonical_rp))
 456                     pa_assert_se(execv(rp, argv) == 0);
 457                 else
 458                     pa_log_warn("/proc/self/exe does not point to %s, cannot self execute. Are you playing games?", canonical_rp);
 459
 460                 pa_xfree(rp);
 461
 462             } else
 463                 pa_log_warn("Couldn't read /proc/self/exe, cannot self execute. Running in a chroot()?");
 464
 465             pa_xfree(canonical_rp);
 466
 467         } else
 468             pa_log_warn("Couldn't canonicalize binary path, cannot self execute.");
 469     }
 470 #endif
 471
 472     if ((e = getenv("PULSE_PASSED_FD"))) {
 473         passed_fd = atoi(e);
 474
 475         if (passed_fd <= 2)
 476             passed_fd = -1;
 477     }
 478
 479     /* We might be autospawned, in which case have no idea in which
 480      * context we have been started. Let's cleanup our execution
 481      * context as good as possible */
 482
 483     pa_reset_personality();
 484     pa_drop_root();
 485     pa_close_all(passed_fd, -1);
 486     pa_reset_sigs(-1);
 487     pa_unblock_sigs(-1);
 488     pa_reset_priority();
 489
 490     setlocale(LC_ALL, "");
 491     pa_init_i18n();
 492
 493     conf = pa_daemon_conf_new();
 494
 495     if (pa_daemon_conf_load(conf, NULL) < 0)
 496         goto finish;
 497
 498     if (pa_daemon_conf_env(conf) < 0)
 499         goto finish;
 500
 501     if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
 502         pa_log(_("Failed to parse command line."));
 503         goto finish;
 504     }
 505
 506     pa_log_set_level(conf->log_level);
 507     pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target);
 508     if (conf->log_meta)
 509         pa_log_set_flags(PA_LOG_PRINT_META, PA_LOG_SET);
 510     if (conf->log_time)
 511         pa_log_set_flags(PA_LOG_PRINT_TIME, PA_LOG_SET);
 512     pa_log_set_show_backtrace(conf->log_backtrace);
 513
 514 #ifdef HAVE_DBUS
 515     /* conf->system_instance and conf->local_server_type control almost the
 516      * same thing; make them agree about what is requested. */
 517     switch (conf->local_server_type) {
 518         case PA_SERVER_TYPE_UNSET:
 519             conf->local_server_type = conf->system_instance ? PA_SERVER_TYPE_SYSTEM : PA_SERVER_TYPE_USER;
 520             break;
 521         case PA_SERVER_TYPE_USER:
 522         case PA_SERVER_TYPE_NONE:
 523             conf->system_instance = FALSE;
 524             break;
 525         case PA_SERVER_TYPE_SYSTEM:
 526             conf->system_instance = TRUE;
 527             break;
 528         default:
 529             pa_assert_not_reached();
 530     }
 531
 532     start_server = conf->local_server_type == PA_SERVER_TYPE_USER || (getuid() == 0 && conf->local_server_type == PA_SERVER_TYPE_SYSTEM);
 533
 534     if (!start_server && conf->local_server_type == PA_SERVER_TYPE_SYSTEM) {
 535         pa_log_notice(_("System mode refused for non-root user. Only starting the D-Bus server lookup service."));
 536         conf->system_instance = FALSE;
 537     }
 538 #endif
 539
 540     LTDL_SET_PRELOADED_SYMBOLS();
 541     pa_ltdl_init();
 542     ltdl_init = TRUE;
 543
 544     if (conf->dl_search_path)
 545         lt_dlsetsearchpath(conf->dl_search_path);
 546
 547 #ifdef OS_IS_WIN32
 548     {
 549         WSADATA data;
 550         WSAStartup(MAKEWORD(2, 0), &data);
 551     }
 552 #endif
 553
 554     pa_random_seed();
 555
 556     switch (conf->cmd) {
 557         case PA_CMD_DUMP_MODULES:
 558             pa_dump_modules(conf, argc-d, argv+d);
 559             retval = 0;
 560             goto finish;
 561
 562         case PA_CMD_DUMP_CONF: {
 563
 564             if (d < argc) {
 565                 pa_log("Too many arguments.\n");
 566                 goto finish;
 567             }
 568
 569             s = pa_daemon_conf_dump(conf);
 570             fputs(s, stdout);
 571             pa_xfree(s);
 572             retval = 0;
 573             goto finish;
 574         }
 575
 576         case PA_CMD_DUMP_RESAMPLE_METHODS: {
 577             int i;
 578
 579             if (d < argc) {
 580                 pa_log("Too many arguments.\n");
 581                 goto finish;
 582             }
 583
 584             for (i = 0; i < PA_RESAMPLER_MAX; i++)
 585                 if (pa_resample_method_supported(i))
 586                     printf("%s\n", pa_resample_method_to_string(i));
 587
 588             retval = 0;
 589             goto finish;
 590         }
 591
 592         case PA_CMD_HELP :
 593             pa_cmdline_help(argv[0]);
 594             retval = 0;
 595             goto finish;
 596
 597         case PA_CMD_VERSION :
 598
 599             if (d < argc) {
 600                 pa_log("Too many arguments.\n");
 601                 goto finish;
 602             }
 603
 604             printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
 605             retval = 0;
 606             goto finish;
 607
 608         case PA_CMD_CHECK: {
 609             pid_t pid;
 610
 611             if (d < argc) {
 612                 pa_log("Too many arguments.\n");
 613                 goto finish;
 614             }
 615
 616             if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
 617                 pa_log_info(_("Daemon not running"));
 618             else {
 619                 pa_log_info(_("Daemon running as PID %u"), pid);
 620                 retval = 0;
 621             }
 622
 623             goto finish;
 624
 625         }
 626         case PA_CMD_KILL:
 627
 628             if (d < argc) {
 629                 pa_log("Too many arguments.\n");
 630                 goto finish;
 631             }
 632
 633             if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
 634                 pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno));
 635             else
 636                 retval = 0;
 637
 638             goto finish;
 639
 640         case PA_CMD_CLEANUP_SHM:
 641
 642             if (d < argc) {
 643                 pa_log("Too many arguments.\n");
 644                 goto finish;
 645             }
 646
 647             if (pa_shm_cleanup() >= 0)
 648                 retval = 0;
 649
 650             goto finish;
 651
 652         default:
 653             pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START);
 654     }
 655
 656     if (d < argc) {
 657         pa_log("Too many arguments.\n");
 658         goto finish;
 659     }
 660
 661     if (getuid() == 0 && !conf->system_instance)
 662         pa_log_warn(_("This program is not intended to be run as root (unless --system is specified)."));
 663 #ifndef HAVE_DBUS /* A similar, only a notice worthy check was done earlier, if D-Bus is enabled. */
 664     else if (getuid() != 0 && conf->system_instance) {
 665         pa_log(_("Root privileges required."));
 666         goto finish;
 667     }
 668 #endif
 669
 670     if (conf->cmd == PA_CMD_START && conf->system_instance) {
 671         pa_log(_("--start not supported for system instances."));
 672         goto finish;
 673     }
 674
 675     if (conf->cmd == PA_CMD_START && (configured_address = check_configured_address())) {
 676         pa_log_notice(_("User-configured server at %s, not autospawning."), configured_address);
 677         pa_xfree(configured_address);
 678         retval = 0;
 679         goto finish;
 680     }
 681
 682     if (conf->system_instance && !conf->disallow_exit)
 683         pa_log_warn(_("Running in system mode, but --disallow-exit not set!"));
 684
 685     if (conf->system_instance && !conf->disallow_module_loading)
 686         pa_log_warn(_("Running in system mode, but --disallow-module-loading not set!"));
 687
 688     if (conf->system_instance && !conf->disable_shm) {
 689         pa_log_notice(_("Running in system mode, forcibly disabling SHM mode!"));
 690         conf->disable_shm = TRUE;
 691     }
 692
 693     if (conf->system_instance && conf->exit_idle_time >= 0) {
 694         pa_log_notice(_("Running in system mode, forcibly disabling exit idle time!"));
 695         conf->exit_idle_time = -1;
 696     }
 697
 698     if (conf->cmd == PA_CMD_START) {
 699         /* If we shall start PA only when it is not running yet, we
 700          * first take the autospawn lock to make things
 701          * synchronous. */
 702
 703         if ((autospawn_fd = pa_autospawn_lock_init()) < 0) {
 704             pa_log("Failed to initialize autospawn lock");
 705             goto finish;
 706         }
 707
 708         if ((pa_autospawn_lock_acquire(TRUE) < 0)) {
 709             pa_log("Failed to acquire autospawn lock");
 710             goto finish;
 711         }
 712
 713         autospawn_locked = TRUE;
 714     }
 715
 716     if (conf->daemonize) {
 717         pid_t child;
 718
 719         if (pa_stdio_acquire() < 0) {
 720             pa_log(_("Failed to acquire stdio."));
 721             goto finish;
 722         }
 723
 724 #ifdef HAVE_FORK
 725         if (pipe(daemon_pipe) < 0) {
 726             pa_log(_("pipe() failed: %s"), pa_cstrerror(errno));
 727             goto finish;
 728         }
 729
 730         if ((child = fork()) < 0) {
 731             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 732             goto finish;
 733         }
 734
 735         if (child != 0) {
 736             ssize_t n;
 737             /* Father */
 738
 739             pa_assert_se(pa_close(daemon_pipe[1]) == 0);
 740             daemon_pipe[1] = -1;
 741
 742             if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) {
 743
 744                 if (n < 0)
 745                     pa_log(_("read() failed: %s"), pa_cstrerror(errno));
 746
 747                 retval = 1;
 748             }
 749
 750             if (retval)
 751                 pa_log(_("Daemon startup failed."));
 752             else
 753                 pa_log_info(_("Daemon startup successful."));
 754
 755             goto finish;
 756         }
 757
 758         if (autospawn_fd >= 0) {
 759             /* The lock file is unlocked from the parent, so we need
 760              * to close it in the child */
 761
 762             pa_autospawn_lock_release();
 763             pa_autospawn_lock_done(TRUE);
 764
 765             autospawn_locked = FALSE;
 766             autospawn_fd = -1;
 767         }
 768
 769         pa_assert_se(pa_close(daemon_pipe[0]) == 0);
 770         daemon_pipe[0] = -1;
 771 #endif
 772
 773         if (conf->auto_log_target)
 774             pa_log_set_target(PA_LOG_SYSLOG);
 775
 776 #ifdef HAVE_SETSID
 777         if (setsid() < 0) {
 778             pa_log(_("setsid() failed: %s"), pa_cstrerror(errno));
 779             goto finish;
 780         }
 781 #endif
 782
 783         /* We now are a session and process group leader. Let's fork
 784          * again and let the father die, so that we'll become a
 785          * process that can never acquire a TTY again, in a session and
 786          * process group without leader */
 787
 788 #ifdef HAVE_FORK
 789         if ((child = fork()) < 0) {
 790             pa_log(_("fork() failed: %s"), pa_cstrerror(errno));
 791             goto finish;
 792         }
 793
 794         if (child != 0) {
 795             retval = 0;
 796             goto finish;
 797         }
 798 #endif
 799
 800 #ifdef SIGTTOU
 801         signal(SIGTTOU, SIG_IGN);
 802 #endif
 803 #ifdef SIGTTIN
 804         signal(SIGTTIN, SIG_IGN);
 805 #endif
 806 #ifdef SIGTSTP
 807         signal(SIGTSTP, SIG_IGN);
 808 #endif
 809
 810         pa_nullify_stdfds();
 811     }
 812
 813     pa_set_env_and_record("PULSE_INTERNAL", "1");
 814     pa_assert_se(chdir("/") == 0);
 815     umask(0022);
 816
 817 #ifdef HAVE_SYS_RESOURCE_H
 818     set_all_rlimits(conf);
 819 #endif
 820     pa_rtclock_hrtimer_enable();
 821
 822     pa_raise_priority(conf->nice_level);
 823
 824     if (conf->system_instance)
 825         if (change_user() < 0)
 826             goto finish;
 827
 828     pa_set_env_and_record("PULSE_SYSTEM", conf->system_instance ? "1" : "0");
 829
 830     pa_log_info(_("This is PulseAudio %s"), PACKAGE_VERSION);
 831     pa_log_debug(_("Compilation host: %s"), CANONICAL_HOST);
 832     pa_log_debug(_("Compilation CFLAGS: %s"), PA_CFLAGS);
 833
 834     s = pa_uname_string();
 835     pa_log_debug(_("Running on host: %s"), s);
 836     pa_xfree(s);
 837
 838     pa_log_debug(_("Found %u CPUs."), pa_ncpus());
 839
 840     pa_log_info(_("Page size is %lu bytes"), (unsigned long) PA_PAGE_SIZE);
 841
 842 #ifdef HAVE_VALGRIND_MEMCHECK_H
 843     pa_log_debug(_("Compiled with Valgrind support: yes"));
 844 #else
 845     pa_log_debug(_("Compiled with Valgrind support: no"));
 846 #endif
 847
 848     pa_log_debug(_("Running in valgrind mode: %s"), pa_yes_no(pa_in_valgrind()));
 849
 850     pa_log_debug(_("Running in VM: %s"), pa_yes_no(pa_running_in_vm()));
 851
 852 #ifdef __OPTIMIZE__
 853     pa_log_debug(_("Optimized build: yes"));
 854 #else
 855     pa_log_debug(_("Optimized build: no"));
 856 #endif
 857
 858 #ifdef NDEBUG
 859     pa_log_debug(_("NDEBUG defined, all asserts disabled."));
 860 #elif defined(FASTPATH)
 861     pa_log_debug(_("FASTPATH defined, only fast path asserts disabled."));
 862 #else
 863     pa_log_debug(_("All asserts enabled."));
 864 #endif
 865
 866     if (!(s = pa_machine_id())) {
 867         pa_log(_("Failed to get machine ID"));
 868         goto finish;
 869     }
 870     pa_log_info(_("Machine ID is %s."), s);
 871     pa_xfree(s);
 872
 873     if ((s = pa_session_id())) {
 874         pa_log_info(_("Session ID is %s."), s);
 875         pa_xfree(s);
 876     }
 877
 878     if (!(s = pa_get_runtime_dir()))
 879         goto finish;
 880     pa_log_info(_("Using runtime directory %s."), s);
 881     pa_xfree(s);
 882
 883     if (!(s = pa_get_state_dir()))
 884         goto finish;
 885     pa_log_info(_("Using state directory %s."), s);
 886     pa_xfree(s);
 887
 888     pa_log_info(_("Using modules directory %s."), conf->dl_search_path);
 889
 890     pa_log_info(_("Running in system mode: %s"), pa_yes_no(pa_in_system_mode()));
 891
 892     if (pa_in_system_mode())
 893         pa_log_warn(_("OK, so you are running PA in system mode. Please note that you most likely shouldn't be doing that.\n"
 894                       "If you do it nonetheless then it's your own fault if things don't work as expected.\n"
 895                       "Please read http://pulseaudio.org/wiki/WhatIsWrongWithSystemMode for an explanation why system mode is usually a bad idea."));
 896
 897     if (conf->use_pid_file) {
 898         int z;
 899
 900         if ((z = pa_pid_file_create("pulseaudio")) != 0) {
 901
 902             if (conf->cmd == PA_CMD_START && z > 0) {
 903                 /* If we are already running and with are run in
 904                  * --start mode, then let's return this as success. */
 905
 906                 retval = 0;
 907                 goto finish;
 908             }
 909
 910             pa_log(_("pa_pid_file_create() failed."));
 911             goto finish;
 912         }
 913
 914         valid_pid_file = TRUE;
 915     }
 916
 917     pa_disable_sigpipe();
 918
 919     if (pa_rtclock_hrtimer())
 920         pa_log_info(_("Fresh high-resolution timers available! Bon appetit!"));
 921     else
 922         pa_log_info(_("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!"));
 923
 924     if (conf->lock_memory) {
 925 #ifdef HAVE_SYS_MMAN_H
 926         if (mlockall(MCL_FUTURE) < 0)
 927             pa_log_warn("mlockall() failed: %s", pa_cstrerror(errno));
 928         else
 929             pa_log_info("Sucessfully locked process into memory.");
 930 #else
 931         pa_log_warn("Memory locking requested but not supported on platform.");
 932 #endif
 933     }
 934
 935     pa_memtrap_install();
 936
 937     if (!getenv("PULSE_NO_SIMD")) {
 938         pa_cpu_init_x86();
 939         pa_cpu_init_arm();
 940     }
 941
 942     pa_assert_se(mainloop = pa_mainloop_new());
 943
 944     if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm, conf->shm_size))) {
 945         pa_log(_("pa_core_new() failed."));
 946         goto finish;
 947     }
 948
 949     c->default_sample_spec = conf->default_sample_spec;
 950     c->default_channel_map = conf->default_channel_map;
 951     c->default_n_fragments = conf->default_n_fragments;
 952     c->default_fragment_size_msec = conf->default_fragment_size_msec;
 953     c->exit_idle_time = conf->exit_idle_time;
 954     c->scache_idle_time = conf->scache_idle_time;
 955     c->resample_method = conf->resample_method;
 956     c->realtime_priority = conf->realtime_priority;
 957     c->realtime_scheduling = !!conf->realtime_scheduling;
 958     c->disable_remixing = !!conf->disable_remixing;
 959     c->disable_lfe_remixing = !!conf->disable_lfe_remixing;
 960     c->running_as_daemon = !!conf->daemonize;
 961     c->disallow_exit = conf->disallow_exit;
 962     c->flat_volumes = conf->flat_volumes;
 963 #ifdef HAVE_DBUS
 964     c->server_type = conf->local_server_type;
 965 #endif
 966
 967     pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
 968     pa_signal_new(SIGINT, signal_callback, c);
 969     pa_signal_new(SIGTERM, signal_callback, c);
 970 #ifdef SIGUSR1
 971     pa_signal_new(SIGUSR1, signal_callback, c);
 972 #endif
 973 #ifdef SIGUSR2
 974     pa_signal_new(SIGUSR2, signal_callback, c);
 975 #endif
 976 #ifdef SIGHUP
 977     pa_signal_new(SIGHUP, signal_callback, c);
 978 #endif
 979
 980 #ifdef OS_IS_WIN32
 981     win32_timer = pa_mainloop_get_api(mainloop)->rtclock_time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL);
 982 #endif
 983
 984     if (!conf->no_cpu_limit)
 985         pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);
 986
 987     buf = pa_strbuf_new();
 988
 989 #ifdef HAVE_DBUS
 990     if (start_server) {
 991 #endif
 992         if (conf->load_default_script_file) {
 993             FILE *f;
 994
 995             if ((f = pa_daemon_conf_open_default_script_file(conf))) {
 996                 r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail);
 997                 fclose(f);
 998             }
 999         }
1000
1001         if (r >= 0)
1002             r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
1003
1004         pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
1005         pa_xfree(s);
1006
1007         if (r < 0 && conf->fail) {
1008             pa_log(_("Failed to initialize daemon."));
1009             goto finish;
1010         }
1011
1012         if (!c->modules || pa_idxset_size(c->modules) == 0) {
1013             pa_log(_("Daemon startup without any loaded modules, refusing to work."));
1014             goto finish;
1015         }
1016 #ifdef HAVE_DBUS
1017     } else {
1018         /* When we just provide the D-Bus server lookup service, we don't want
1019          * any modules to be loaded. We haven't loaded any so far, so one might
1020          * think there's no way to contact the server, but receiving certain
1021          * signals could still cause modules to load. */
1022         conf->disallow_module_loading = TRUE;
1023     }
1024 #endif
1025
1026     /* We completed the initial module loading, so let's disable it
1027      * from now on, if requested */
1028     c->disallow_module_loading = !!conf->disallow_module_loading;
1029
1030 #ifdef HAVE_DBUS
1031     if (!conf->system_instance) {
1032         if (!(server_lookup = pa_dbusobj_server_lookup_new(c)))
1033             goto finish;
1034         if (!(lookup_service_bus = register_dbus_name(c, DBUS_BUS_SESSION, "org.PulseAudio1")))
1035             goto finish;
1036     }
1037
1038     if (start_server && !(server_bus = register_dbus_name(c, conf->system_instance ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, "org.pulseaudio.Server")))
1039         goto finish;
1040 #endif
1041
1042 #ifdef HAVE_FORK
1043     if (daemon_pipe[1] >= 0) {
1044         int ok = 0;
1045         pa_loop_write(daemon_pipe[1], &ok, sizeof(ok), NULL);
1046         pa_close(daemon_pipe[1]);
1047         daemon_pipe[1] = -1;
1048     }
1049 #endif
1050
1051     pa_log_info(_("Daemon startup complete."));
1052
1053     retval = 0;
1054     if (pa_mainloop_run(mainloop, &retval) < 0)
1055         goto finish;
1056
1057     pa_log_info(_("Daemon shutdown initiated."));
1058
1059 finish:
1060 #ifdef HAVE_DBUS
1061     if (server_bus)
1062         pa_dbus_connection_unref(server_bus);
1063     if (lookup_service_bus)
1064         pa_dbus_connection_unref(lookup_service_bus);
1065     if (server_lookup)
1066         pa_dbusobj_server_lookup_free(server_lookup);
1067 #endif
1068
1069     if (autospawn_fd >= 0) {
1070         if (autospawn_locked)
1071             pa_autospawn_lock_release();
1072
1073         pa_autospawn_lock_done(FALSE);
1074     }
1075
1076 #ifdef OS_IS_WIN32
1077     if (win32_timer)
1078         pa_mainloop_get_api(mainloop)->time_free(win32_timer);
1079 #endif
1080
1081     if (c) {
1082         pa_core_unref(c);
1083         pa_log_info(_("Daemon terminated."));
1084     }
1085
1086     if (!conf->no_cpu_limit)
1087         pa_cpu_limit_done();
1088
1089     pa_signal_done();
1090
1091 #ifdef HAVE_FORK
1092     if (daemon_pipe[1] >= 0)
1093         pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
1094
1095     pa_close_pipe(daemon_pipe);
1096 #endif
1097
1098     if (mainloop)
1099         pa_mainloop_free(mainloop);
1100
1101     if (conf)
1102         pa_daemon_conf_free(conf);
1103
1104     if (valid_pid_file)
1105         pa_pid_file_remove();
1106
1107     /* This has no real purpose except making things valgrind-clean */
1108     pa_unset_env_recorded();
1109
1110 #ifdef OS_IS_WIN32
1111     WSACleanup();
1112 #endif
1113
1114     if (ltdl_init)
1115         pa_ltdl_done();
1116
1117 #ifdef HAVE_DBUS
1118     dbus_shutdown();
1119 #endif
1120
1121     return retval;
1122 }