4 This file is part of PulseAudio.
6 Copyright 2004-2006 Lennart Poettering
7 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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.
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.
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
41 #include <sys/types.h>
43 #include <liboil/liboil.h>
45 #ifdef HAVE_SYS_IOCTL_H
46 #include <sys/ioctl.h>
61 #include <pulse/mainloop.h>
62 #include <pulse/mainloop-signal.h>
63 #include <pulse/timeval.h>
64 #include <pulse/xmalloc.h>
66 #include <pulsecore/winsock.h>
67 #include <pulsecore/core-error.h>
68 #include <pulsecore/core.h>
69 #include <pulsecore/memblock.h>
70 #include <pulsecore/module.h>
71 #include <pulsecore/cli-command.h>
72 #include <pulsecore/log.h>
73 #include <pulsecore/core-util.h>
74 #include <pulsecore/sioman.h>
75 #include <pulsecore/cli-text.h>
76 #include <pulsecore/pid.h>
77 #include <pulsecore/namereg.h>
78 #include <pulsecore/random.h>
79 #include <pulsecore/rtsig.h>
80 #include <pulsecore/rtclock.h>
81 #include <pulsecore/macro.h>
82 #include <pulsecore/mutex.h>
83 #include <pulsecore/thread.h>
84 #include <pulsecore/once.h>
85 #include <pulsecore/shm.h>
89 #include "daemon-conf.h"
90 #include "dumpmodules.h"
94 /* Only one instance of these variables */
95 int allow_severity
= LOG_INFO
;
96 int deny_severity
= LOG_WARNING
;
100 /* padsp looks for this symbol in the running process and disables
101 * itself if it finds it and it is set to 7 (which is actually a bit
102 * mask). For details see padsp. */
103 int __padsp_disabled__
= 7;
108 static void message_cb(pa_mainloop_api
*a
, pa_time_event
*e
, PA_GCC_UNUSED
const struct timeval
*tv
, void *userdata
) {
110 struct timeval tvnext
;
112 while(PeekMessage(&msg
, NULL
, 0, 0, PM_REMOVE
)) {
113 if (msg
.message
== WM_QUIT
)
116 TranslateMessage(&msg
);
117 DispatchMessage(&msg
);
121 pa_timeval_add(pa_gettimeofday(&tvnext
), 100000);
122 a
->time_restart(e
, &tvnext
);
127 static void signal_callback(pa_mainloop_api
*m
, PA_GCC_UNUSED pa_signal_event
*e
, int sig
, void *userdata
) {
128 pa_log_info("Got signal %s.", pa_strsignal(sig
));
133 pa_module_load(userdata
, "module-cli", NULL
);
139 pa_module_load(userdata
, "module-cli-protocol-unix", NULL
);
145 char *c
= pa_full_status_string(userdata
);
146 pa_log_notice("%s", c
);
155 pa_log_info("Exiting.");
161 static void close_pipe(int p
[2]) {
163 pa_assert_se(pa_close(p
[0]) == 0);
165 pa_assert_se(pa_close(p
[1]) == 0);
169 #define set_env(key, value) putenv(pa_sprintf_malloc("%s=%s", (key), (value)))
171 #if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
173 static int change_user(void) {
178 /* This function is called only in system-wide mode. It creates a
179 * runtime dir in /var/run/ with proper UID/GID and drops privs
182 if (!(pw
= getpwnam(PA_SYSTEM_USER
))) {
183 pa_log("Failed to find user '%s'.", PA_SYSTEM_USER
);
187 if (!(gr
= getgrnam(PA_SYSTEM_GROUP
))) {
188 pa_log("Failed to find group '%s'.", PA_SYSTEM_GROUP
);
192 pa_log_info("Found user '%s' (UID %lu) and group '%s' (GID %lu).",
193 PA_SYSTEM_USER
, (unsigned long) pw
->pw_uid
,
194 PA_SYSTEM_GROUP
, (unsigned long) gr
->gr_gid
);
196 if (pw
->pw_gid
!= gr
->gr_gid
) {
197 pa_log("GID of user '%s' and of group '%s' don't match.", PA_SYSTEM_USER
, PA_SYSTEM_GROUP
);
201 if (strcmp(pw
->pw_dir
, PA_SYSTEM_RUNTIME_PATH
) != 0)
202 pa_log_warn("Warning: home directory of user '%s' is not '%s', ignoring.", PA_SYSTEM_USER
, PA_SYSTEM_RUNTIME_PATH
);
204 if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH
, 0755, pw
->pw_uid
, gr
->gr_gid
) < 0) {
205 pa_log("Failed to create '%s': %s", PA_SYSTEM_RUNTIME_PATH
, pa_cstrerror(errno
));
209 if (initgroups(PA_SYSTEM_USER
, gr
->gr_gid
) != 0) {
210 pa_log("Failed to change group list: %s", pa_cstrerror(errno
));
214 #if defined(HAVE_SETRESGID)
215 r
= setresgid(gr
->gr_gid
, gr
->gr_gid
, gr
->gr_gid
);
216 #elif defined(HAVE_SETEGID)
217 if ((r
= setgid(gr
->gr_gid
)) >= 0)
218 r
= setegid(gr
->gr_gid
);
219 #elif defined(HAVE_SETREGID)
220 r
= setregid(gr
->gr_gid
, gr
->gr_gid
);
222 #error "No API to drop priviliges"
226 pa_log("Failed to change GID: %s", pa_cstrerror(errno
));
230 #if defined(HAVE_SETRESUID)
231 r
= setresuid(pw
->pw_uid
, pw
->pw_uid
, pw
->pw_uid
);
232 #elif defined(HAVE_SETEUID)
233 if ((r
= setuid(pw
->pw_uid
)) >= 0)
234 r
= seteuid(pw
->pw_uid
);
235 #elif defined(HAVE_SETREUID)
236 r
= setreuid(pw
->pw_uid
, pw
->pw_uid
);
238 #error "No API to drop priviliges"
242 pa_log("Failed to change UID: %s", pa_cstrerror(errno
));
246 set_env("USER", PA_SYSTEM_USER
);
247 set_env("LOGNAME", PA_SYSTEM_GROUP
);
248 set_env("HOME", PA_SYSTEM_RUNTIME_PATH
);
250 /* Relevant for pa_runtime_path() */
251 set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH
);
252 set_env("PULSE_CONFIG_PATH", PA_SYSTEM_RUNTIME_PATH
);
254 pa_log_info("Successfully dropped root privileges.");
259 #else /* HAVE_PWD_H && HAVE_GRP_H */
261 static int change_user(void) {
262 pa_log("System wide mode unsupported on this platform.");
266 #endif /* HAVE_PWD_H && HAVE_GRP_H */
268 static int create_runtime_dir(void) {
271 pa_runtime_path(NULL
, fn
, sizeof(fn
));
273 /* This function is called only when the daemon is started in
274 * per-user mode. We create the runtime directory somewhere in
275 * /tmp/ with the current UID/GID */
277 if (pa_make_secure_dir(fn
, 0700, (uid_t
)-1, (gid_t
)-1) < 0) {
278 pa_log("Failed to create '%s': %s", fn
, pa_cstrerror(errno
));
285 #ifdef HAVE_SYS_RESOURCE_H
287 static void set_one_rlimit(const pa_rlimit
*r
, int resource
, const char *name
) {
294 rl
.rlim_cur
= rl
.rlim_max
= r
->value
;
296 if (setrlimit(resource
, &rl
) < 0)
297 pa_log_warn("setrlimit(%s, (%u, %u)) failed: %s", name
, (unsigned) r
->value
, (unsigned) r
->value
, pa_cstrerror(errno
));
300 static void set_all_rlimits(const pa_daemon_conf
*conf
) {
301 set_one_rlimit(&conf
->rlimit_as
, RLIMIT_AS
, "RLIMIT_AS");
302 set_one_rlimit(&conf
->rlimit_core
, RLIMIT_CORE
, "RLIMIT_CORE");
303 set_one_rlimit(&conf
->rlimit_data
, RLIMIT_DATA
, "RLIMIT_DATA");
304 set_one_rlimit(&conf
->rlimit_fsize
, RLIMIT_FSIZE
, "RLIMIT_FSIZE");
305 set_one_rlimit(&conf
->rlimit_nofile
, RLIMIT_NOFILE
, "RLIMIT_NOFILE");
306 set_one_rlimit(&conf
->rlimit_stack
, RLIMIT_STACK
, "RLIMIT_STACK");
308 set_one_rlimit(&conf
->rlimit_nproc
, RLIMIT_NPROC
, "RLIMIT_NPROC");
310 #ifdef RLIMIT_MEMLOCK
311 set_one_rlimit(&conf
->rlimit_memlock
, RLIMIT_MEMLOCK
, "RLIMIT_MEMLOCK");
316 static pa_mutex
*libtool_mutex
= NULL
;
318 static void libtool_lock(void) {
319 pa_mutex_lock(libtool_mutex
);
322 static void libtool_unlock(void) {
323 pa_mutex_unlock(libtool_mutex
);
326 PA_STATIC_TLS_DECLARE_NO_FREE(libtool_tls
);
328 static void libtool_set_error(const char * error
) {
329 PA_STATIC_TLS_SET(libtool_tls
, (char*) error
);
332 static const char *libtool_get_error(void) {
333 return PA_STATIC_TLS_GET(libtool_tls
);
336 static void libtool_init(void) {
337 pa_assert_se(libtool_mutex
= pa_mutex_new(1));
338 pa_assert_se(lt_dlmutex_register(libtool_lock
, libtool_unlock
, libtool_set_error
, libtool_get_error
) == 0);
339 pa_assert_se(lt_dlinit() == 0);
342 static void libtool_done(void) {
343 pa_assert_se(lt_dlexit() == 0);
344 pa_mutex_free(libtool_mutex
);
345 libtool_mutex
= NULL
;
348 int main(int argc
, char *argv
[]) {
350 pa_strbuf
*buf
= NULL
;
351 pa_daemon_conf
*conf
= NULL
;
352 pa_mainloop
*mainloop
= NULL
;
355 int r
, retval
= 1, d
= 0;
356 int daemon_pipe
[2] = { -1, -1 };
357 int suid_root
, real_root
;
358 int valid_pid_file
= 0;
360 gid_t gid
= (gid_t
) -1;
363 pa_time_event
*timer
;
368 real_root
= getuid() == 0;
369 suid_root
= !real_root
&& geteuid() == 0;
376 /* Drop all capabilities except CAP_SYS_NICE */
379 /* Drop priviliges, but keep CAP_SYS_NICE */
382 /* After dropping root, the effective set is reset, hence,
383 * let's raise it again */
386 /* When capabilities are not supported we will not be able to
387 * aquire RT sched anymore. But yes, that's the way it is. It
388 * is just too risky tun let PA run as root all the time. */
391 setlocale(LC_ALL
, "");
393 if (suid_root
&& (pa_own_uid_in_group(PA_REALTIME_GROUP
, &gid
) <= 0)) {
394 pa_log_info("Warning: Called SUID root, but not in group '"PA_REALTIME_GROUP
"'. "
395 "For enabling real-time scheduling please become a member of '"PA_REALTIME_GROUP
"' , or increase the RLIMIT_RTPRIO user limit.");
398 suid_root
= real_root
= 0;
401 LTDL_SET_PRELOADED_SYMBOLS();
408 WSAStartup(MAKEWORD(2, 0), &data
);
414 pa_log_set_ident("pulseaudio");
416 conf
= pa_daemon_conf_new();
418 if (pa_daemon_conf_load(conf
, NULL
) < 0)
421 if (pa_daemon_conf_env(conf
) < 0)
424 if (pa_cmdline_parse(conf
, argc
, argv
, &d
) < 0) {
425 pa_log("failed to parse command line.");
429 pa_log_set_maximal_level(conf
->log_level
);
430 pa_log_set_target(conf
->auto_log_target
? PA_LOG_STDERR
: conf
->log_target
, NULL
);
432 if (conf
->high_priority
&& conf
->cmd
== PA_CMD_DAEMON
)
435 if (suid_root
&& (conf
->cmd
!= PA_CMD_DAEMON
|| !conf
->high_priority
)) {
440 if (conf
->dl_search_path
)
441 lt_dlsetsearchpath(conf
->dl_search_path
);
444 case PA_CMD_DUMP_MODULES
:
445 pa_dump_modules(conf
, argc
-d
, argv
+d
);
449 case PA_CMD_DUMP_CONF
: {
450 s
= pa_daemon_conf_dump(conf
);
457 case PA_CMD_DUMP_RESAMPLE_METHODS
: {
460 for (i
= 0; i
< PA_RESAMPLER_MAX
; i
++)
461 if (pa_resample_method_supported(i
))
462 printf("%s\n", pa_resample_method_to_string(i
));
468 pa_cmdline_help(argv
[0]);
472 case PA_CMD_VERSION
:
473 printf(PACKAGE_NAME
" "PACKAGE_VERSION
"\n");
480 if (pa_pid_file_check_running(&pid
) < 0) {
481 pa_log_info("daemon not running");
483 pa_log_info("daemon running as PID %u", pid
);
492 if (pa_pid_file_kill(SIGINT
, NULL
) < 0)
493 pa_log("failed to kill daemon.");
499 case PA_CMD_CLEANUP_SHM
:
501 if (pa_shm_cleanup() >= 0)
507 pa_assert(conf
->cmd
== PA_CMD_DAEMON
);
510 if (real_root
&& !conf
->system_instance
) {
511 pa_log_warn("This program is not intended to be run as root (unless --system is specified).");
512 } else if (!real_root
&& conf
->system_instance
) {
513 pa_log("Root priviliges required.");
517 if (conf
->daemonize
) {
521 if (pa_stdio_acquire() < 0) {
522 pa_log("failed to acquire stdio.");
527 if (pipe(daemon_pipe
) < 0) {
528 pa_log("failed to create pipe.");
532 if ((child
= fork()) < 0) {
533 pa_log("fork() failed: %s", pa_cstrerror(errno
));
540 pa_assert_se(pa_close(daemon_pipe
[1]) == 0);
543 if (pa_loop_read(daemon_pipe
[0], &retval
, sizeof(retval
), NULL
) != sizeof(retval
)) {
544 pa_log("read() failed: %s", pa_cstrerror(errno
));
549 pa_log("daemon startup failed.");
551 pa_log_info("daemon startup successful.");
556 pa_assert_se(pa_close(daemon_pipe
[0]) == 0);
560 if (conf
->auto_log_target
)
561 pa_log_set_target(PA_LOG_SYSLOG
, NULL
);
575 open("/dev/null", O_RDONLY
);
576 open("/dev/null", O_WRONLY
);
577 open("/dev/null", O_WRONLY
);
583 signal(SIGTTOU
, SIG_IGN
);
586 signal(SIGTTIN
, SIG_IGN
);
589 signal(SIGTSTP
, SIG_IGN
);
593 if ((tty_fd
= open("/dev/tty", O_RDWR
)) >= 0) {
594 ioctl(tty_fd
, TIOCNOTTY
, (char*) 0);
595 pa_assert_se(pa_close(tty_fd
) == 0);
600 pa_assert_se(chdir("/") == 0);
603 if (conf
->system_instance
) {
604 if (change_user() < 0)
606 } else if (create_runtime_dir() < 0)
609 if (conf
->use_pid_file
) {
610 if (pa_pid_file_create() < 0) {
611 pa_log("pa_pid_file_create() failed.");
614 pa_loop_write(daemon_pipe
[1], &retval
, sizeof(retval
), NULL
);
622 #ifdef HAVE_SYS_RESOURCE_H
623 set_all_rlimits(conf
);
627 signal(SIGPIPE
, SIG_IGN
);
630 pa_log_info("Page size is %lu bytes", (unsigned long) PA_PAGE_SIZE
);
632 if (pa_rtclock_hrtimer())
633 pa_log_info("Fresh high-resolution timers available! Bon appetit!");
635 pa_log_info("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!");
637 pa_rtsig_configure(SIGRTMIN
+10, SIGRTMAX
);
639 pa_assert_se(mainloop
= pa_mainloop_new());
641 if (!(c
= pa_core_new(pa_mainloop_get_api(mainloop
), !conf
->disable_shm
))) {
642 pa_log("pa_core_new() failed.");
646 c
->is_system_instance
= !!conf
->system_instance
;
647 c
->high_priority
= !!conf
->high_priority
;
648 c
->default_sample_spec
= conf
->default_sample_spec
;
649 c
->default_n_fragments
= conf
->default_n_fragments
;
650 c
->default_fragment_size_msec
= conf
->default_fragment_size_msec
;
651 c
->disallow_module_loading
= conf
->disallow_module_loading
;
652 c
->exit_idle_time
= conf
->exit_idle_time
;
653 c
->module_idle_time
= conf
->module_idle_time
;
654 c
->scache_idle_time
= conf
->scache_idle_time
;
655 c
->resample_method
= conf
->resample_method
;
657 pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop
)) == 0);
658 pa_signal_new(SIGINT
, signal_callback
, c
);
659 pa_signal_new(SIGTERM
, signal_callback
, c
);
662 pa_signal_new(SIGUSR1
, signal_callback
, c
);
665 pa_signal_new(SIGUSR2
, signal_callback
, c
);
668 pa_signal_new(SIGHUP
, signal_callback
, c
);
672 pa_assert_se(timer
= pa_mainloop_get_api(mainloop
)->time_new(pa_mainloop_get_api(mainloop
), pa_gettimeofday(&tv
), message_cb
, NULL
));
676 c
->running_as_daemon
= 1;
680 if (!conf
->no_cpu_limit
)
681 pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop
)) == 0);
683 buf
= pa_strbuf_new();
684 if (conf
->default_script_file
)
685 r
= pa_cli_command_execute_file(c
, conf
->default_script_file
, buf
, &conf
->fail
);
688 r
= pa_cli_command_execute(c
, conf
->script_commands
, buf
, &conf
->fail
);
689 pa_log_error("%s", s
= pa_strbuf_tostring_free(buf
));
692 if (r
< 0 && conf
->fail
) {
693 pa_log("failed to initialize daemon.");
696 pa_loop_write(daemon_pipe
[1], &retval
, sizeof(retval
), NULL
);
698 } else if (!c
->modules
|| pa_idxset_size(c
->modules
) == 0) {
699 pa_log("daemon startup without any loaded modules, refusing to work.");
702 pa_loop_write(daemon_pipe
[1], &retval
, sizeof(retval
), NULL
);
709 pa_loop_write(daemon_pipe
[1], &retval
, sizeof(retval
), NULL
);
712 if (c
->default_sink_name
&&
713 pa_namereg_get(c
, c
->default_sink_name
, PA_NAMEREG_SINK
, 1) == NULL
) {
714 pa_log_error("%s : Fatal error. Default sink name (%s) does not exist in name register.", __FILE__
, c
->default_sink_name
);
717 pa_log_info("Daemon startup complete.");
718 if (pa_mainloop_run(mainloop
, &retval
) < 0)
720 pa_log_info("Daemon shutdown initiated.");
725 pa_mainloop_get_api(mainloop
)->time_free(timer
);
730 if (!conf
->no_cpu_limit
)
735 pa_log_info("Daemon terminated.");
740 pa_mainloop_free(mainloop
);
743 pa_daemon_conf_free(conf
);
746 pa_pid_file_remove();
748 close_pipe(daemon_pipe
);