summaryrefslogtreecommitdiffstats
path: root/src/daemon/main.c
blob: 6b0c81daf3686726f51ccd2742e6bea9be05ff73 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
/* $Id$ */

/***
  This file is part of PulseAudio.

  Copyright 2004-2006 Lennart Poettering
  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB

  PulseAudio is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published
  by the Free Software Foundation; either version 2 of the License,
  or (at your option) any later version.

  PulseAudio is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with PulseAudio; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <stddef.h>
#include <ltdl.h>
#include <limits.h>
#include <fcntl.h>
#include <unistd.h>
#include <locale.h>
#include <sys/types.h>

#include <liboil/liboil.h>

#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif

#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif

#ifdef HAVE_LIBWRAP
#include <syslog.h>
#include <tcpd.h>
#endif

#ifdef HAVE_DBUS
#include <dbus/dbus.h>
#endif

#include <pulse/mainloop.h>
#include <pulse/mainloop-signal.h>
#include <pulse/timeval.h>
#include <pulse/xmalloc.h>

#include <pulsecore/winsock.h>
#include <pulsecore/core-error.h>
#include <pulsecore/core.h>
#include <pulsecore/memblock.h>
#include <pulsecore/module.h>
#include <pulsecore/cli-command.h>
#include <pulsecore/log.h>
#include <pulsecore/core-util.h>
#include <pulsecore/sioman.h>
#include <pulsecore/cli-text.h>
#include <pulsecore/pid.h>
#include <pulsecore/namereg.h>
#include <pulsecore/random.h>
#include <pulsecore/rtsig.h>
#include <pulsecore/rtclock.h>
#include <pulsecore/macro.h>
#include <pulsecore/mutex.h>
#include <pulsecore/thread.h>
#include <pulsecore/once.h>
#include <pulsecore/shm.h>

#include "cmdline.h"
#include "cpulimit.h"
#include "daemon-conf.h"
#include "dumpmodules.h"
#include "caps.h"
#include "ltdl-bind-now.h"
#include "polkit.h"

#ifdef HAVE_LIBWRAP
/* Only one instance of these variables */
int allow_severity = LOG_INFO;
int deny_severity = LOG_WARNING;
#endif

#ifdef HAVE_OSS
/* padsp looks for this symbol in the running process and disables
 * itself if it finds it and it is set to 7 (which is actually a bit
 * mask). For details see padsp. */
int __padsp_disabled__ = 7;
#endif

#ifdef OS_IS_WIN32

static void message_cb(pa_mainloop_api*a, pa_time_event*e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
    MSG msg;
    struct timeval tvnext;

    while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
        if (msg.message == WM_QUIT)
            raise(SIGTERM);
        else {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    pa_timeval_add(pa_gettimeofday(&tvnext), 100000);
    a->time_restart(e, &tvnext);
}

#endif

static void signal_callback(pa_mainloop_api*m, PA_GCC_UNUSED pa_signal_event *e, int sig, void *userdata) {
    pa_log_info("Got signal %s.", pa_sig2str(sig));

    switch (sig) {
#ifdef SIGUSR1
        case SIGUSR1:
            pa_module_load(userdata, "module-cli", NULL);
            break;
#endif

#ifdef SIGUSR2
        case SIGUSR2:
            pa_module_load(userdata, "module-cli-protocol-unix", NULL);
            break;
#endif

#ifdef SIGHUP
        case SIGHUP: {
            char *c = pa_full_status_string(userdata);
            pa_log_notice("%s", c);
            pa_xfree(c);
            return;
        }
#endif

        case SIGINT:
        case SIGTERM:
        default:
            pa_log_info("Exiting.");
            m->quit(m, 1);
            break;
    }
}

#define set_env(key, value) putenv(pa_sprintf_malloc("%s=%s", (key), (value)))

#if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)

static int change_user(void) {
    struct passwd *pw;
    struct group * gr;
    int r;

    /* This function is called only in system-wide mode. It creates a
     * runtime dir in /var/run/ with proper UID/GID and drops privs
     * afterwards. */

    if (!(pw = getpwnam(PA_SYSTEM_USER))) {
        pa_log("Failed to find user '%s'.", PA_SYSTEM_USER);
        return -1;
    }

    if (!(gr = getgrnam(PA_SYSTEM_GROUP))) {
        pa_log("Failed to find group '%s'.", PA_SYSTEM_GROUP);
        return -1;
    }

    pa_log_info("Found user '%s' (UID %lu) and group '%s' (GID %lu).",
                PA_SYSTEM_USER, (unsigned long) pw->pw_uid,
                PA_SYSTEM_GROUP, (unsigned long) gr->gr_gid);

    if (pw->pw_gid != gr->gr_gid) {
        pa_log("GID of user '%s' and of group '%s' don't match.", PA_SYSTEM_USER, PA_SYSTEM_GROUP);
        return -1;
    }

    if (strcmp(pw->pw_dir, PA_SYSTEM_RUNTIME_PATH) != 0)
        pa_log_warn("Warning: home directory of user '%s' is not '%s', ignoring.", PA_SYSTEM_USER, PA_SYSTEM_RUNTIME_PATH);

    if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH, 0755, pw->pw_uid, gr->gr_gid) < 0) {
        pa_log("Failed to create '%s': %s", PA_SYSTEM_RUNTIME_PATH, pa_cstrerror(errno));
        return -1;
    }

    if (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
        pa_log("Failed to change group list: %s", pa_cstrerror(errno));
        return -1;
    }

#if defined(HAVE_SETRESGID)
    r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
#elif defined(HAVE_SETEGID)
    if ((r = setgid(gr->gr_gid)) >= 0)
        r = setegid(gr->gr_gid);
#elif defined(HAVE_SETREGID)
    r = setregid(gr->gr_gid, gr->gr_gid);
#else
#error "No API to drop priviliges"
#endif

    if (r < 0) {
        pa_log("Failed to change GID: %s", pa_cstrerror(errno));
        return -1;
    }

#if defined(HAVE_SETRESUID)
    r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
#elif defined(HAVE_SETEUID)
    if ((r = setuid(pw->pw_uid)) >= 0)
        r = seteuid(pw->pw_uid);
#elif defined(HAVE_SETREUID)
    r = setreuid(pw->pw_uid, pw->pw_uid);
#else
#error "No API to drop priviliges"
#endif

    if (r < 0) {
        pa_log("Failed to change UID: %s", pa_cstrerror(errno));
        return -1;
    }

    set_env("USER", PA_SYSTEM_USER);
    set_env("USERNAME", PA_SYSTEM_USER);
    set_env("LOGNAME", PA_SYSTEM_USER);
    set_env("HOME", PA_SYSTEM_RUNTIME_PATH);

    /* Relevant for pa_runtime_path() */
    set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
    set_env("PULSE_CONFIG_PATH", PA_SYSTEM_RUNTIME_PATH);

    pa_log_info("Successfully dropped root privileges.");

    return 0;
}

#else /* HAVE_PWD_H && HAVE_GRP_H */

static int change_user(void) {
    pa_log("System wide mode unsupported on this platform.");
    return -1;
}

#endif /* HAVE_PWD_H && HAVE_GRP_H */

static int create_runtime_dir(void) {
    char fn[PATH_MAX];

    pa_runtime_path(NULL, fn, sizeof(fn));

    /* This function is called only when the daemon is started in
     * per-user mode. We create the runtime directory somewhere in
     * /tmp/ with the current UID/GID */

    if (pa_make_secure_dir(fn, 0700, (uid_t)-1, (gid_t)-1) < 0) {
        pa_log("Failed to create '%s': %s", fn, pa_cstrerror(errno));
        return -1;
    }

    return 0;
}

#ifdef HAVE_SYS_RESOURCE_H

static int set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
    struct rlimit rl;
    pa_assert(r);

    if (!r->is_set)
        return 0;

    rl.rlim_cur = rl.rlim_max = r->value;

    if (setrlimit(resource, &rl) < 0) {
        pa_log_warn("setrlimit(%s, (%u, %u)) failed: %s", name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
        return -1;
    }

    return 0;
}

static void set_all_rlimits(const pa_daemon_conf *conf) {
    set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
    set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
    set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
    set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
    set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
    set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
#ifdef RLIMIT_NPROC
    set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
#endif
#ifdef RLIMIT_MEMLOCK
    set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
#endif
#ifdef RLIMIT_NICE
    set_one_rlimit(&conf->rlimit_nice, RLIMIT_NICE, "RLIMIT_NICE");
#endif
#ifdef RLIMIT_RTPRIO
    set_one_rlimit(&conf->rlimit_rtprio, RLIMIT_RTPRIO, "RLIMIT_RTPRIO");
#endif
}
#endif

int main(int argc, char *argv[]) {
    pa_core *c = NULL;
    pa_strbuf *buf = NULL;
    pa_daemon_conf *conf = NULL;
    pa_mainloop *mainloop = NULL;
    char *s;
    int r = 0, retval = 1, d = 0;
    int daemon_pipe[2] = { -1, -1 };
    pa_bool_t suid_root, real_root;
    int valid_pid_file = 0;
    gid_t gid = (gid_t) -1;
    pa_bool_t allow_realtime, allow_high_priority;
    pa_bool_t ltdl_init = FALSE;

#ifdef OS_IS_WIN32
    pa_time_event *timer;
    struct timeval tv;
#endif


#if defined(__linux__) && defined(__OPTIMIZE__)
    /*
       Disable lazy relocations to make usage of external libraries
       more deterministic for our RT threads. We abuse __OPTIMIZE__ as
       a check whether we are a debug build or not.
    */

    if (!getenv("LD_BIND_NOW")) {
        char *rp;

        /* We have to execute ourselves, because the libc caches the
         * value of $LD_BIND_NOW on initialization. */

        putenv(pa_xstrdup("LD_BIND_NOW=1"));
        pa_assert_se(rp = pa_readlink("/proc/self/exe"));
        pa_assert_se(execv(rp, argv) == 0);
    }
#endif

#ifdef HAVE_GETUID
    real_root = getuid() == 0;
    suid_root = !real_root && geteuid() == 0;
#else
    real_root = FALSE;
    suid_root = FALSE;
#endif

    if (suid_root) {
        /* Drop all capabilities except CAP_SYS_NICE  */
        pa_limit_caps();

        /* Drop priviliges, but keep CAP_SYS_NICE */
        pa_drop_root();

        /* After dropping root, the effective set is reset, hence,
         * let's raise it again */
        pa_limit_caps();

        /* When capabilities are not supported we will not be able to
         * aquire RT sched anymore. But yes, that's the way it is. It
         * is just too risky tun let PA run as root all the time. */
    }

    /* At this point, we are a normal user, possibly with CAP_NICE if
     * we were started SUID. If we are started as normal root, than we
     * still are normal root. */

    setlocale(LC_ALL, "");
    pa_log_set_maximal_level(PA_LOG_INFO);
    pa_log_set_ident("pulseaudio");

    conf = pa_daemon_conf_new();

    if (pa_daemon_conf_load(conf, NULL) < 0)
        goto finish;

    if (pa_daemon_conf_env(conf) < 0)
        goto finish;

    if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
        pa_log("Failed to parse command line.");
        goto finish;
    }

    pa_log_set_maximal_level(conf->log_level);
    pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);

    if (suid_root) {
        /* Ok, we're suid root, so let's better not enable high prio
         * or RT by default */

        allow_high_priority = allow_realtime = FALSE;

#ifdef HAVE_POLKIT
        if (conf->high_priority) {
            if (pa_polkit_check("org.pulseaudio.acquire-high-priority") > 0) {
                pa_log_info("PolicyKit grants us acquire-high-priority privilige.");
                allow_high_priority = TRUE;
            } else
                pa_log_info("PolicyKit refuses acquire-high-priority privilige.");
        }

        if (conf->realtime_scheduling) {
            if (pa_polkit_check("org.pulseaudio.acquire-real-time") > 0) {
                pa_log_info("PolicyKit grants us acquire-real-time privilige.");
                allow_realtime = TRUE;
            } else
                pa_log_info("PolicyKit refuses acquire-real-time privilige.");
        }
#endif

        if ((conf->high_priority || conf->realtime_scheduling) && pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) {
            pa_log_info("We're in the group '"PA_REALTIME_GROUP"', allowing real-time and high-priority scheduling.");
            allow_realtime = conf->realtime_scheduling;
            allow_high_priority = conf->high_priority;
        }

        if (!allow_high_priority && !allow_realtime) {

            /* OK, there's no further need to keep CAP_NICE. Hence
             * let's give it up early */

            pa_drop_caps();
            pa_drop_root();
            suid_root = real_root = FALSE;

            if (conf->high_priority || conf->realtime_scheduling)
                pa_log_notice("Called SUID root and real-time/high-priority scheduling was requested in the configuration. However, we lack the necessary priviliges:\n"
                              "We are not in group '"PA_REALTIME_GROUP"' and PolicyKit refuse to grant us priviliges. Dropping SUID again.\n"
                              "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.");
        }

    } else {

        /* OK, we're a normal user, so let's allow the user evrything
         * he asks for, it's now the kernel's job to enforce limits,
         * not ours anymore */
        allow_high_priority = allow_realtime = TRUE;
    }

    if (conf->high_priority && !allow_high_priority) {
        pa_log_info("High-priority scheduling enabled in configuration but now allowed by policy. Disabling forcibly.");
        conf->high_priority = FALSE;
    }

    if (conf->realtime_scheduling && !allow_realtime) {
        pa_log_info("Real-time scheduling enabled in configuration but now allowed by policy. Disabling forcibly.");
        conf->realtime_scheduling = FALSE;
    }

    if (conf->high_priority && conf->cmd == PA_CMD_DAEMON)
        pa_raise_priority(conf->nice_level);

    if (suid_root) {
        pa_bool_t drop;

        drop = conf->cmd != PA_CMD_DAEMON || !conf->realtime_scheduling;

#ifdef RLIMIT_RTPRIO
        if (!drop) {

            /* At this point we still have CAP_NICE if we were loaded
             * SUID root. If possible let's acquire RLIMIT_RTPRIO
             * instead and give CAP_NICE up. */

            const pa_rlimit rl = { 9, TRUE };

            if (set_one_rlimit(&rl, RLIMIT_RTPRIO, "RLIMIT_RTPRIO") >= 0) {
                pa_log_info("Successfully increased RLIMIT_RTPRIO, giving up CAP_NICE.");
                drop = TRUE;
            } else
                pa_log_warn("RLIMIT_RTPRIO failed: %s", pa_cstrerror(errno));
        }
#endif

        if (drop)  {
            pa_drop_caps();
            pa_drop_root();
            suid_root = real_root = FALSE;
        }
    }

    LTDL_SET_PRELOADED_SYMBOLS();
    pa_ltdl_init();
    ltdl_init = TRUE;

    if (conf->dl_search_path)
        lt_dlsetsearchpath(conf->dl_search_path);

#ifdef OS_IS_WIN32
    {
        WSADATA data;
        WSAStartup(MAKEWORD(2, 0), &data);
    }
#endif

    pa_random_seed();

    switch (conf->cmd) {
        case PA_CMD_DUMP_MODULES:
            pa_dump_modules(conf, argc-d, argv+d);
            retval = 0;
            goto finish;

        case PA_CMD_DUMP_CONF: {
            s = pa_daemon_conf_dump(conf);
            fputs(s, stdout);
            pa_xfree(s);
            retval = 0;
            goto finish;
        }

        case PA_CMD_DUMP_RESAMPLE_METHODS: {
            int i;

            for (i = 0; i < PA_RESAMPLER_MAX; i++)
                if (pa_resample_method_supported(i))
                    printf("%s\n", pa_resample_method_to_string(i));

            goto finish;
        }

        case PA_CMD_HELP :
            pa_cmdline_help(argv[0]);
            retval = 0;
            goto finish;

        case PA_CMD_VERSION :
            printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
            retval = 0;
            goto finish;

        case PA_CMD_CHECK: {
            pid_t pid;

            if (pa_pid_file_check_running(&pid, "pulseaudio") < 0)
                pa_log_info("Daemon not running");
            else {
                pa_log_info("Daemon running as PID %u", pid);
                retval = 0;
            }

            goto finish;

        }
        case PA_CMD_KILL:

            if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0)
                pa_log("Failed to kill daemon.");
            else
                retval = 0;

            goto finish;

        case PA_CMD_CLEANUP_SHM:

            if (pa_shm_cleanup() >= 0)
                retval = 0;

            goto finish;

        default:
            pa_assert(conf->cmd == PA_CMD_DAEMON);
    }

    if (real_root && !conf->system_instance)
        pa_log_warn("This program is not intended to be run as root (unless --system is specified).");
    else if (!real_root && conf->system_instance) {
        pa_log("Root priviliges required.");
        goto finish;
    }

    if (conf->daemonize) {
        pid_t child;
        int tty_fd;

        if (pa_stdio_acquire() < 0) {
            pa_log("Failed to acquire stdio.");
            goto finish;
        }

#ifdef HAVE_FORK
        if (pipe(daemon_pipe) < 0) {
            pa_log("Failed to create pipe.");
            goto finish;
        }

        if ((child = fork()) < 0) {
            pa_log("fork() failed: %s", pa_cstrerror(errno));
            goto finish;
        }

        if (child != 0) {
            /* Father */

            pa_assert_se(pa_close(daemon_pipe[1]) == 0);
            daemon_pipe[1] = -1;

            if (pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL) != sizeof(retval)) {
                pa_log("read() failed: %s", pa_cstrerror(errno));
                retval = 1;
            }

            if (retval)
                pa_log("daemon startup failed.");
            else
                pa_log_info("daemon startup successful.");

            goto finish;
        }

        pa_assert_se(pa_close(daemon_pipe[0]) == 0);
        daemon_pipe[0] = -1;
#endif

        if (conf->auto_log_target)
            pa_log_set_target(PA_LOG_SYSLOG, NULL);

#ifdef HAVE_SETSID
        setsid();
#endif
#ifdef HAVE_SETPGID
        setpgid(0,0);
#endif

#ifndef OS_IS_WIN32
        pa_close(0);
        pa_close(1);
        pa_close(2);

        open("/dev/null", O_RDONLY);
        open("/dev/null", O_WRONLY);
        open("/dev/null", O_WRONLY);
#else
        FreeConsole();
#endif

#ifdef SIGTTOU
        signal(SIGTTOU, SIG_IGN);
#endif
#ifdef SIGTTIN
        signal(SIGTTIN, SIG_IGN);
#endif
#ifdef SIGTSTP
        signal(SIGTSTP, SIG_IGN);
#endif

#ifdef TIOCNOTTY
        if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
            ioctl(tty_fd, TIOCNOTTY, (char*) 0);
            pa_assert_se(pa_close(tty_fd) == 0);
        }
#endif
    }

    pa_assert_se(chdir("/") == 0);
    umask(0022);

    if (conf->system_instance) {
        if (change_user() < 0)
            goto finish;
    } else if (create_runtime_dir() < 0)
        goto finish;

    if (conf->use_pid_file) {
        if (pa_pid_file_create() < 0) {
            pa_log("pa_pid_file_create() failed.");
#ifdef HAVE_FORK
            if (conf->daemonize)
                pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
#endif
            goto finish;
        }

        valid_pid_file = 1;
    }

#ifdef HAVE_SYS_RESOURCE_H
    set_all_rlimits(conf);
#endif

#ifdef SIGPIPE
    signal(SIGPIPE, SIG_IGN);
#endif

    pa_log_info("This is PulseAudio " PACKAGE_VERSION);
    pa_log_info("Page size is %lu bytes", (unsigned long) PA_PAGE_SIZE);

    if (pa_rtclock_hrtimer())
        pa_log_info("Fresh high-resolution timers available! Bon appetit!");
    else
        pa_log_info("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!");

#ifdef SIGRTMIN
    /* Valgrind uses SIGRTMAX. To easy debugging we don't use it here */
    pa_rtsig_configure(SIGRTMIN, SIGRTMAX-1);
#endif

    pa_assert_se(mainloop = pa_mainloop_new());

    if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm))) {
        pa_log("pa_core_new() failed.");
        goto finish;
    }

    c->is_system_instance = !!conf->system_instance;
    c->default_sample_spec = conf->default_sample_spec;
    c->default_n_fragments = conf->default_n_fragments;
    c->default_fragment_size_msec = conf->default_fragment_size_msec;
    c->exit_idle_time = conf->exit_idle_time;
    c->module_idle_time = conf->module_idle_time;
    c->scache_idle_time = conf->scache_idle_time;
    c->resample_method = conf->resample_method;
    c->realtime_priority = conf->realtime_priority;
    c->realtime_scheduling = !!conf->realtime_scheduling;
    c->disable_remixing = !!conf->disable_remixing;

    pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0);
    pa_signal_new(SIGINT, signal_callback, c);
    pa_signal_new(SIGTERM, signal_callback, c);

#ifdef SIGUSR1
    pa_signal_new(SIGUSR1, signal_callback, c);
#endif
#ifdef SIGUSR2
    pa_signal_new(SIGUSR2, signal_callback, c);
#endif
#ifdef SIGHUP
    pa_signal_new(SIGHUP, signal_callback, c);
#endif

#ifdef OS_IS_WIN32
    pa_assert_se(timer = pa_mainloop_get_api(mainloop)->time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&tv), message_cb, NULL));
#endif

    if (conf->daemonize)
        c->running_as_daemon = TRUE;

    oil_init();

    if (!conf->no_cpu_limit)
        pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0);

    buf = pa_strbuf_new();
    if (conf->default_script_file)
        r = pa_cli_command_execute_file(c, conf->default_script_file, buf, &conf->fail);

    if (r >= 0)
        r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
    pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
    pa_xfree(s);

    /* We completed the initial module loading, so let's disable it
     * from now on, if requested */
    c->disallow_module_loading = !!conf->disallow_module_loading;

    if (r < 0 && conf->fail) {
        pa_log("Failed to initialize daemon.");
#ifdef HAVE_FORK
        if (conf->daemonize)
            pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
#endif
    } else if (!c->modules || pa_idxset_size(c->modules) == 0) {
        pa_log("daemon startup without any loaded modules, refusing to work.");
#ifdef HAVE_FORK
        if (conf->daemonize)
            pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
#endif
    } else {

        retval = 0;

        if (c->default_sink_name &&
            pa_namereg_get(c, c->default_sink_name, PA_NAMEREG_SINK, 1) == NULL) {
            pa_log_error("%s : Default sink name (%s) does not exist in name register.", __FILE__, c->default_sink_name);
            retval = !!conf->fail;
        }

#ifdef HAVE_FORK
        if (conf->daemonize)
            pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
#endif

        if (!retval) {
            pa_log_info("Daemon startup complete.");
            if (pa_mainloop_run(mainloop, &retval) < 0)
                retval = 1;
            pa_log_info("Daemon shutdown initiated.");
        }
    }

#ifdef OS_IS_WIN32
    pa_mainloop_get_api(mainloop)->time_free(timer);
#endif

    pa_core_unref(c);

    if (!conf->no_cpu_limit)
        pa_cpu_limit_done();

    pa_signal_done();

    pa_log_info("Daemon terminated.");

finish:

    if (mainloop)
        pa_mainloop_free(mainloop);

    if (conf)
        pa_daemon_conf_free(conf);

    if (valid_pid_file)
        pa_pid_file_remove();

    pa_close_pipe(daemon_pipe);

#ifdef OS_IS_WIN32
    WSACleanup();
#endif

    if (ltdl_init)
        pa_ltdl_done();

#ifdef HAVE_DBUS
    dbus_shutdown();
#endif

    return retval;
}