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>
62 #include <dbus/dbus.h>
65 #include <pulse/mainloop.h>
66 #include <pulse/mainloop-signal.h>
67 #include <pulse/timeval.h>
68 #include <pulse/xmalloc.h>
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>
93 #include "daemon-conf.h"
94 #include "dumpmodules.h"
96 #include "ltdl-bind-now.h"
99 /* Only one instance of these variables */
100 int allow_severity
= LOG_INFO
;
101 int deny_severity
= LOG_WARNING
;
105 /* padsp looks for this symbol in the running process and disables
106 * itself if it finds it and it is set to 7 (which is actually a bit
107 * mask). For details see padsp. */
108 int __padsp_disabled__
= 7;
113 static void message_cb(pa_mainloop_api
*a
, pa_time_event
*e
, PA_GCC_UNUSED
const struct timeval
*tv
, void *userdata
) {
115 struct timeval tvnext
;
117 while(PeekMessage(&msg
, NULL
, 0, 0, PM_REMOVE
)) {
118 if (msg
.message
== WM_QUIT
)
121 TranslateMessage(&msg
);
122 DispatchMessage(&msg
);
126 pa_timeval_add(pa_gettimeofday(&tvnext
), 100000);
127 a
->time_restart(e
, &tvnext
);
132 static void signal_callback(pa_mainloop_api
*m
, PA_GCC_UNUSED pa_signal_event
*e
, int sig
, void *userdata
) {
133 pa_log_info("Got signal %s.", pa_sig2str(sig
));
138 pa_module_load(userdata
, "module-cli", NULL
);
144 pa_module_load(userdata
, "module-cli-protocol-unix", NULL
);
150 char *c
= pa_full_status_string(userdata
);
151 pa_log_notice("%s", c
);
160 pa_log_info("Exiting.");
166 #define set_env(key, value) putenv(pa_sprintf_malloc("%s=%s", (key), (value)))
168 #if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
170 static int change_user(void) {
175 /* This function is called only in system-wide mode. It creates a
176 * runtime dir in /var/run/ with proper UID/GID and drops privs
179 if (!(pw
= getpwnam(PA_SYSTEM_USER
))) {
180 pa_log("Failed to find user '%s'.", PA_SYSTEM_USER
);
184 if (!(gr
= getgrnam(PA_SYSTEM_GROUP
))) {
185 pa_log("Failed to find group '%s'.", PA_SYSTEM_GROUP
);
189 pa_log_info("Found user '%s' (UID %lu) and group '%s' (GID %lu).",
190 PA_SYSTEM_USER
, (unsigned long) pw
->pw_uid
,
191 PA_SYSTEM_GROUP
, (unsigned long) gr
->gr_gid
);
193 if (pw
->pw_gid
!= gr
->gr_gid
) {
194 pa_log("GID of user '%s' and of group '%s' don't match.", PA_SYSTEM_USER
, PA_SYSTEM_GROUP
);
198 if (strcmp(pw
->pw_dir
, PA_SYSTEM_RUNTIME_PATH
) != 0)
199 pa_log_warn("Warning: home directory of user '%s' is not '%s', ignoring.", PA_SYSTEM_USER
, PA_SYSTEM_RUNTIME_PATH
);
201 if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH
, 0755, pw
->pw_uid
, gr
->gr_gid
) < 0) {
202 pa_log("Failed to create '%s': %s", PA_SYSTEM_RUNTIME_PATH
, pa_cstrerror(errno
));
206 if (initgroups(PA_SYSTEM_USER
, gr
->gr_gid
) != 0) {
207 pa_log("Failed to change group list: %s", pa_cstrerror(errno
));
211 #if defined(HAVE_SETRESGID)
212 r
= setresgid(gr
->gr_gid
, gr
->gr_gid
, gr
->gr_gid
);
213 #elif defined(HAVE_SETEGID)
214 if ((r
= setgid(gr
->gr_gid
)) >= 0)
215 r
= setegid(gr
->gr_gid
);
216 #elif defined(HAVE_SETREGID)
217 r
= setregid(gr
->gr_gid
, gr
->gr_gid
);
219 #error "No API to drop priviliges"
223 pa_log("Failed to change GID: %s", pa_cstrerror(errno
));
227 #if defined(HAVE_SETRESUID)
228 r
= setresuid(pw
->pw_uid
, pw
->pw_uid
, pw
->pw_uid
);
229 #elif defined(HAVE_SETEUID)
230 if ((r
= setuid(pw
->pw_uid
)) >= 0)
231 r
= seteuid(pw
->pw_uid
);
232 #elif defined(HAVE_SETREUID)
233 r
= setreuid(pw
->pw_uid
, pw
->pw_uid
);
235 #error "No API to drop priviliges"
239 pa_log("Failed to change UID: %s", pa_cstrerror(errno
));
243 set_env("USER", PA_SYSTEM_USER
);
244 set_env("LOGNAME", PA_SYSTEM_GROUP
);
245 set_env("HOME", PA_SYSTEM_RUNTIME_PATH
);
247 /* Relevant for pa_runtime_path() */
248 set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH
);
249 set_env("PULSE_CONFIG_PATH", PA_SYSTEM_RUNTIME_PATH
);
251 pa_log_info("Successfully dropped root privileges.");
256 #else /* HAVE_PWD_H && HAVE_GRP_H */
258 static int change_user(void) {
259 pa_log("System wide mode unsupported on this platform.");
263 #endif /* HAVE_PWD_H && HAVE_GRP_H */
265 static int create_runtime_dir(void) {
268 pa_runtime_path(NULL
, fn
, sizeof(fn
));
270 /* This function is called only when the daemon is started in
271 * per-user mode. We create the runtime directory somewhere in
272 * /tmp/ with the current UID/GID */
274 if (pa_make_secure_dir(fn
, 0700, (uid_t
)-1, (gid_t
)-1) < 0) {
275 pa_log("Failed to create '%s': %s", fn
, pa_cstrerror(errno
));
282 #ifdef HAVE_SYS_RESOURCE_H
284 static void set_one_rlimit(const pa_rlimit
*r
, int resource
, const char *name
) {
291 rl
.rlim_cur
= rl
.rlim_max
= r
->value
;
293 if (setrlimit(resource
, &rl
) < 0)
294 pa_log_warn("setrlimit(%s, (%u, %u)) failed: %s", name
, (unsigned) r
->value
, (unsigned) r
->value
, pa_cstrerror(errno
));
297 static void set_all_rlimits(const pa_daemon_conf
*conf
) {
298 set_one_rlimit(&conf
->rlimit_as
, RLIMIT_AS
, "RLIMIT_AS");
299 set_one_rlimit(&conf
->rlimit_core
, RLIMIT_CORE
, "RLIMIT_CORE");
300 set_one_rlimit(&conf
->rlimit_data
, RLIMIT_DATA
, "RLIMIT_DATA");
301 set_one_rlimit(&conf
->rlimit_fsize
, RLIMIT_FSIZE
, "RLIMIT_FSIZE");
302 set_one_rlimit(&conf
->rlimit_nofile
, RLIMIT_NOFILE
, "RLIMIT_NOFILE");
303 set_one_rlimit(&conf
->rlimit_stack
, RLIMIT_STACK
, "RLIMIT_STACK");
305 set_one_rlimit(&conf
->rlimit_nproc
, RLIMIT_NPROC
, "RLIMIT_NPROC");
307 #ifdef RLIMIT_MEMLOCK
308 set_one_rlimit(&conf
->rlimit_memlock
, RLIMIT_MEMLOCK
, "RLIMIT_MEMLOCK");
311 set_one_rlimit(&conf
->rlimit_nice
, RLIMIT_NICE
, "RLIMIT_NICE");
314 set_one_rlimit(&conf
->rlimit_rtprio
, RLIMIT_RTPRIO
, "RLIMIT_RTPRIO");
319 int main(int argc
, char *argv
[]) {
321 pa_strbuf
*buf
= NULL
;
322 pa_daemon_conf
*conf
= NULL
;
323 pa_mainloop
*mainloop
= NULL
;
325 int r
= 0, retval
= 1, d
= 0;
326 int daemon_pipe
[2] = { -1, -1 };
327 int suid_root
, real_root
;
328 int valid_pid_file
= 0;
329 gid_t gid
= (gid_t
) -1;
332 pa_time_event
*timer
;
337 #if defined(__linux__) && defined(__OPTIMIZE__)
339 Disable lazy relocations to make usage of external libraries
340 more deterministic for our RT threads. We abuse __OPTIMIZE__ as
341 a check whether we are a debug build or not.
344 if (!getenv("LD_BIND_NOW")) {
347 /* We have to execute ourselves, because the libc caches the
348 * value of $LD_BIND_NOW on initialization. */
350 putenv(pa_xstrdup("LD_BIND_NOW=1"));
351 pa_assert_se(rp
= pa_readlink("/proc/self/exe"));
352 pa_assert_se(execv(rp
, argv
) == 0);
357 real_root
= getuid() == 0;
358 suid_root
= !real_root
&& geteuid() == 0;
365 /* Drop all capabilities except CAP_SYS_NICE */
368 /* Drop priviliges, but keep CAP_SYS_NICE */
371 /* After dropping root, the effective set is reset, hence,
372 * let's raise it again */
375 /* When capabilities are not supported we will not be able to
376 * aquire RT sched anymore. But yes, that's the way it is. It
377 * is just too risky tun let PA run as root all the time. */
380 setlocale(LC_ALL
, "");
382 if (suid_root
&& (pa_own_uid_in_group(PA_REALTIME_GROUP
, &gid
) <= 0)) {
383 pa_log_info("Warning: Called SUID root, but not in group '"PA_REALTIME_GROUP
"'. "
384 "For enabling real-time scheduling please become a member of '"PA_REALTIME_GROUP
"' , or increase the RLIMIT_RTPRIO user limit.");
387 suid_root
= real_root
= 0;
390 LTDL_SET_PRELOADED_SYMBOLS();
397 WSAStartup(MAKEWORD(2, 0), &data
);
403 pa_log_set_ident("pulseaudio");
405 conf
= pa_daemon_conf_new();
407 if (pa_daemon_conf_load(conf
, NULL
) < 0)
410 if (pa_daemon_conf_env(conf
) < 0)
413 if (pa_cmdline_parse(conf
, argc
, argv
, &d
) < 0) {
414 pa_log("failed to parse command line.");
418 pa_log_set_maximal_level(conf
->log_level
);
419 pa_log_set_target(conf
->auto_log_target
? PA_LOG_STDERR
: conf
->log_target
, NULL
);
421 if (conf
->high_priority
&& conf
->cmd
== PA_CMD_DAEMON
)
424 if (suid_root
&& (conf
->cmd
!= PA_CMD_DAEMON
|| !conf
->high_priority
)) {
429 if (conf
->dl_search_path
)
430 lt_dlsetsearchpath(conf
->dl_search_path
);
433 case PA_CMD_DUMP_MODULES
:
434 pa_dump_modules(conf
, argc
-d
, argv
+d
);
438 case PA_CMD_DUMP_CONF
: {
439 s
= pa_daemon_conf_dump(conf
);
446 case PA_CMD_DUMP_RESAMPLE_METHODS
: {
449 for (i
= 0; i
< PA_RESAMPLER_MAX
; i
++)
450 if (pa_resample_method_supported(i
))
451 printf("%s\n", pa_resample_method_to_string(i
));
457 pa_cmdline_help(argv
[0]);
461 case PA_CMD_VERSION
:
462 printf(PACKAGE_NAME
" "PACKAGE_VERSION
"\n");
469 if (pa_pid_file_check_running(&pid
) < 0) {
470 pa_log_info("daemon not running");
472 pa_log_info("daemon running as PID %u", pid
);
481 if (pa_pid_file_kill(SIGINT
, NULL
) < 0)
482 pa_log("failed to kill daemon.");
488 case PA_CMD_CLEANUP_SHM
:
490 if (pa_shm_cleanup() >= 0)
496 pa_assert(conf
->cmd
== PA_CMD_DAEMON
);
499 if (real_root
&& !conf
->system_instance
) {
500 pa_log_warn("This program is not intended to be run as root (unless --system is specified).");
501 } else if (!real_root
&& conf
->system_instance
) {
502 pa_log("Root priviliges required.");
506 if (conf
->daemonize
) {
510 if (pa_stdio_acquire() < 0) {
511 pa_log("failed to acquire stdio.");
516 if (pipe(daemon_pipe
) < 0) {
517 pa_log("failed to create pipe.");
521 if ((child
= fork()) < 0) {
522 pa_log("fork() failed: %s", pa_cstrerror(errno
));
529 pa_assert_se(pa_close(daemon_pipe
[1]) == 0);
532 if (pa_loop_read(daemon_pipe
[0], &retval
, sizeof(retval
), NULL
) != sizeof(retval
)) {
533 pa_log("read() failed: %s", pa_cstrerror(errno
));
538 pa_log("daemon startup failed.");
540 pa_log_info("daemon startup successful.");
545 pa_assert_se(pa_close(daemon_pipe
[0]) == 0);
549 if (conf
->auto_log_target
)
550 pa_log_set_target(PA_LOG_SYSLOG
, NULL
);
564 open("/dev/null", O_RDONLY
);
565 open("/dev/null", O_WRONLY
);
566 open("/dev/null", O_WRONLY
);
572 signal(SIGTTOU
, SIG_IGN
);
575 signal(SIGTTIN
, SIG_IGN
);
578 signal(SIGTSTP
, SIG_IGN
);
582 if ((tty_fd
= open("/dev/tty", O_RDWR
)) >= 0) {
583 ioctl(tty_fd
, TIOCNOTTY
, (char*) 0);
584 pa_assert_se(pa_close(tty_fd
) == 0);
589 pa_assert_se(chdir("/") == 0);
592 if (conf
->system_instance
) {
593 if (change_user() < 0)
595 } else if (create_runtime_dir() < 0)
598 if (conf
->use_pid_file
) {
599 if (pa_pid_file_create() < 0) {
600 pa_log("pa_pid_file_create() failed.");
603 pa_loop_write(daemon_pipe
[1], &retval
, sizeof(retval
), NULL
);
611 #ifdef HAVE_SYS_RESOURCE_H
612 set_all_rlimits(conf
);
616 signal(SIGPIPE
, SIG_IGN
);
619 pa_log_info("Page size is %lu bytes", (unsigned long) PA_PAGE_SIZE
);
621 if (pa_rtclock_hrtimer())
622 pa_log_info("Fresh high-resolution timers available! Bon appetit!");
624 pa_log_info("Dude, your kernel stinks! The chef's recommendation today is Linux with high-resolution timers enabled!");
627 /* Valgrind uses SIGRTMAX. To easy debugging we don't use it here */
628 pa_rtsig_configure(SIGRTMIN
, SIGRTMAX
-1);
631 pa_assert_se(mainloop
= pa_mainloop_new());
633 if (!(c
= pa_core_new(pa_mainloop_get_api(mainloop
), !conf
->disable_shm
))) {
634 pa_log("pa_core_new() failed.");
638 c
->is_system_instance
= !!conf
->system_instance
;
639 c
->high_priority
= !!conf
->high_priority
;
640 c
->default_sample_spec
= conf
->default_sample_spec
;
641 c
->default_n_fragments
= conf
->default_n_fragments
;
642 c
->default_fragment_size_msec
= conf
->default_fragment_size_msec
;
643 c
->disallow_module_loading
= conf
->disallow_module_loading
;
644 c
->exit_idle_time
= conf
->exit_idle_time
;
645 c
->module_idle_time
= conf
->module_idle_time
;
646 c
->scache_idle_time
= conf
->scache_idle_time
;
647 c
->resample_method
= conf
->resample_method
;
649 pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop
)) == 0);
650 pa_signal_new(SIGINT
, signal_callback
, c
);
651 pa_signal_new(SIGTERM
, signal_callback
, c
);
654 pa_signal_new(SIGUSR1
, signal_callback
, c
);
657 pa_signal_new(SIGUSR2
, signal_callback
, c
);
660 pa_signal_new(SIGHUP
, signal_callback
, c
);
664 pa_assert_se(timer
= pa_mainloop_get_api(mainloop
)->time_new(pa_mainloop_get_api(mainloop
), pa_gettimeofday(&tv
), message_cb
, NULL
));
668 c
->running_as_daemon
= 1;
672 if (!conf
->no_cpu_limit
)
673 pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop
)) == 0);
675 buf
= pa_strbuf_new();
676 if (conf
->default_script_file
)
677 r
= pa_cli_command_execute_file(c
, conf
->default_script_file
, buf
, &conf
->fail
);
680 r
= pa_cli_command_execute(c
, conf
->script_commands
, buf
, &conf
->fail
);
681 pa_log_error("%s", s
= pa_strbuf_tostring_free(buf
));
684 if (r
< 0 && conf
->fail
) {
685 pa_log("failed to initialize daemon.");
688 pa_loop_write(daemon_pipe
[1], &retval
, sizeof(retval
), NULL
);
690 } else if (!c
->modules
|| pa_idxset_size(c
->modules
) == 0) {
691 pa_log("daemon startup without any loaded modules, refusing to work.");
694 pa_loop_write(daemon_pipe
[1], &retval
, sizeof(retval
), NULL
);
701 pa_loop_write(daemon_pipe
[1], &retval
, sizeof(retval
), NULL
);
704 if (c
->default_sink_name
&&
705 pa_namereg_get(c
, c
->default_sink_name
, PA_NAMEREG_SINK
, 1) == NULL
) {
706 pa_log_error("%s : Fatal error. Default sink name (%s) does not exist in name register.", __FILE__
, c
->default_sink_name
);
709 pa_log_info("Daemon startup complete.");
710 if (pa_mainloop_run(mainloop
, &retval
) < 0)
712 pa_log_info("Daemon shutdown initiated.");
717 pa_mainloop_get_api(mainloop
)->time_free(timer
);
722 if (!conf
->no_cpu_limit
)
727 pa_log_info("Daemon terminated.");
732 pa_mainloop_free(mainloop
);
735 pa_daemon_conf_free(conf
);
738 pa_pid_file_remove();
740 pa_close_pipe(daemon_pipe
);