4 This file is part of PulseAudio.
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2 of the License,
9 or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
39 #include <sys/types.h>
41 #include <liboil/liboil.h>
43 #ifdef HAVE_SYS_IOCTL_H
44 #include <sys/ioctl.h>
59 #include "../pulsecore/winsock.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/core-error.h>
67 #include <pulsecore/core.h>
68 #include <pulsecore/memblock.h>
69 #include <pulsecore/module.h>
70 #include <pulsecore/cli-command.h>
71 #include <pulsecore/log.h>
72 #include <pulsecore/core-util.h>
73 #include <pulsecore/sioman.h>
74 #include <pulsecore/cli-text.h>
75 #include <pulsecore/pid.h>
76 #include <pulsecore/namereg.h>
77 #include <pulsecore/random.h>
81 #include "daemon-conf.h"
82 #include "dumpmodules.h"
86 /* Only one instance of these variables */
87 int allow_severity = LOG_INFO;
88 int deny_severity = LOG_WARNING;
92 /* padsp looks for this symbol in the running process and disables
93 * itself if it finds it and it is set to 7 (which is actually a bit
94 * mask). For details see padsp. */
95 int __padsp_disabled__ = 7;
100 static void message_cb(pa_mainloop_api*a, pa_time_event*e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
102 struct timeval tvnext;
104 while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
105 if (msg.message == WM_QUIT)
108 TranslateMessage(&msg);
109 DispatchMessage(&msg);
113 pa_timeval_add(pa_gettimeofday(&tvnext), 100000);
114 a->time_restart(e, &tvnext);
119 static void signal_callback(pa_mainloop_api*m, PA_GCC_UNUSED pa_signal_event *e, int sig, void *userdata) {
120 pa_log_info(__FILE__": Got signal %s.", pa_strsignal(sig));
125 pa_module_load(userdata, "module-cli", NULL);
131 pa_module_load(userdata, "module-cli-protocol-unix", NULL);
137 char *c = pa_full_status_string(userdata);
138 pa_log_notice("%s", c);
147 pa_log_info(__FILE__": Exiting.");
153 static void close_pipe(int p[2]) {
161 #define set_env(key, value) putenv(pa_sprintf_malloc("%s=%s", (key), (value)))
163 #if defined(HAVE_PWD_H) && defined(HAVE_GRP_H)
165 static int change_user(void) {
170 /* This function is called only in system-wide mode. It creates a
171 * runtime dir in /var/run/ with proper UID/GID and drops privs
174 if (!(pw = getpwnam(PA_SYSTEM_USER))) {
175 pa_log(__FILE__": Failed to find user '%s'.", PA_SYSTEM_USER);
179 if (!(gr = getgrnam(PA_SYSTEM_GROUP))) {
180 pa_log(__FILE__": Failed to find group '%s'.", PA_SYSTEM_GROUP);
184 pa_log_info(__FILE__": Found user '%s' (UID %lu) and group '%s' (GID %lu).",
185 PA_SYSTEM_USER, (unsigned long) pw->pw_uid,
186 PA_SYSTEM_GROUP, (unsigned long) gr->gr_gid);
188 if (pw->pw_gid != gr->gr_gid) {
189 pa_log(__FILE__": GID of user '%s' and of group '%s' don't match.", PA_SYSTEM_USER, PA_SYSTEM_GROUP);
193 if (strcmp(pw->pw_dir, PA_SYSTEM_RUNTIME_PATH) != 0)
194 pa_log_warn(__FILE__": Warning: home directory of user '%s' is not '%s', ignoring.", PA_SYSTEM_USER, PA_SYSTEM_RUNTIME_PATH);
196 if (pa_make_secure_dir(PA_SYSTEM_RUNTIME_PATH, 0755, pw->pw_uid, gr->gr_gid) < 0) {
197 pa_log(__FILE__": Failed to create '%s': %s", PA_SYSTEM_RUNTIME_PATH, pa_cstrerror(errno));
201 if (initgroups(PA_SYSTEM_USER, gr->gr_gid) != 0) {
202 pa_log(__FILE__": Failed to change group list: %s", pa_cstrerror(errno));
206 #if defined(HAVE_SETRESGID)
207 r = setresgid(gr->gr_gid, gr->gr_gid, gr->gr_gid);
208 #elif defined(HAVE_SETEGID)
209 if ((r = setgid(gr->gr_gid)) >= 0)
210 r = setegid(gr->gr_gid);
211 #elif defined(HAVE_SETREGID)
212 r = setregid(gr->gr_gid, gr->gr_gid);
214 #error "No API to drop priviliges"
218 pa_log(__FILE__": Failed to change GID: %s", pa_cstrerror(errno));
222 #if defined(HAVE_SETRESUID)
223 r = setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid);
224 #elif defined(HAVE_SETEUID)
225 if ((r = setuid(pw->pw_uid)) >= 0)
226 r = seteuid(pw->pw_uid);
227 #elif defined(HAVE_SETREUID)
228 r = setreuid(pw->pw_uid, pw->pw_uid);
230 #error "No API to drop priviliges"
234 pa_log(__FILE__": Failed to change UID: %s", pa_cstrerror(errno));
238 set_env("USER", PA_SYSTEM_USER);
239 set_env("LOGNAME", PA_SYSTEM_GROUP);
240 set_env("HOME", PA_SYSTEM_RUNTIME_PATH);
242 /* Relevant for pa_runtime_path() */
243 set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH);
244 set_env("PULSE_CONFIG_PATH", PA_SYSTEM_RUNTIME_PATH);
246 pa_log_info(__FILE__": Successfully dropped root privileges.");
251 #else /* HAVE_PWD_H && HAVE_GRP_H */
253 static int change_user(void) {
254 pa_log(__FILE__": System wide mode unsupported on this platform.");
258 #endif /* HAVE_PWD_H && HAVE_GRP_H */
260 static int create_runtime_dir(void) {
263 pa_runtime_path(NULL, fn, sizeof(fn));
265 /* This function is called only when the daemon is started in
266 * per-user mode. We create the runtime directory somewhere in
267 * /tmp/ with the current UID/GID */
269 if (pa_make_secure_dir(fn, 0700, (uid_t)-1, (gid_t)-1) < 0) {
270 pa_log(__FILE__": Failed to create '%s': %s", fn, pa_cstrerror(errno));
277 #ifdef HAVE_SYS_RESOURCE_H
279 static void set_one_rlimit(const pa_rlimit *r, int resource, const char *name) {
286 rl.rlim_cur = rl.rlim_max = r->value;
288 if (setrlimit(resource, &rl) < 0)
289 pa_log_warn(__FILE__": setrlimit(%s, (%u, %u)) failed: %s", name, (unsigned) r->value, (unsigned) r->value, pa_cstrerror(errno));
292 static void set_all_rlimits(const pa_daemon_conf *conf) {
293 set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS");
294 set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE");
295 set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA");
296 set_one_rlimit(&conf->rlimit_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE");
297 set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE");
298 set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK");
300 set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC");
302 #ifdef RLIMIT_MEMLOCK
303 set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK");
308 int main(int argc, char *argv[]) {
310 pa_strbuf *buf = NULL;
311 pa_daemon_conf *conf;
312 pa_mainloop *mainloop;
315 int r, retval = 1, d = 0;
316 int daemon_pipe[2] = { -1, -1 };
317 int suid_root, real_root;
318 int valid_pid_file = 0;
321 gid_t gid = (gid_t) -1;
325 pa_time_event *timer;
329 setlocale(LC_ALL, "");
334 real_root = getuid() == 0;
335 suid_root = !real_root && geteuid() == 0;
337 if (suid_root && (pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) <= 0 || gid >= 1000)) {
338 pa_log_warn(__FILE__": WARNING: called SUID root, but not in group '"PA_REALTIME_GROUP"'.");
346 LTDL_SET_PRELOADED_SYMBOLS();
354 WSAStartup(MAKEWORD(2, 0), &data);
360 pa_log_set_ident("pulseaudio");
362 conf = pa_daemon_conf_new();
364 if (pa_daemon_conf_load(conf, NULL) < 0)
367 if (pa_daemon_conf_env(conf) < 0)
370 if (pa_cmdline_parse(conf, argc, argv, &d) < 0) {
371 pa_log(__FILE__": failed to parse command line.");
375 pa_log_set_maximal_level(conf->log_level);
376 pa_log_set_target(conf->auto_log_target ? PA_LOG_STDERR : conf->log_target, NULL);
378 if (conf->high_priority && conf->cmd == PA_CMD_DAEMON)
386 if (conf->dl_search_path)
387 lt_dlsetsearchpath(conf->dl_search_path);
390 case PA_CMD_DUMP_MODULES:
391 pa_dump_modules(conf, argc-d, argv+d);
395 case PA_CMD_DUMP_CONF: {
396 s = pa_daemon_conf_dump(conf);
404 pa_cmdline_help(argv[0]);
408 case PA_CMD_VERSION :
409 printf(PACKAGE_NAME" "PACKAGE_VERSION"\n");
416 if (pa_pid_file_check_running(&pid) < 0) {
417 pa_log_info(__FILE__": daemon not running");
419 pa_log_info(__FILE__": daemon running as PID %u", pid);
428 if (pa_pid_file_kill(SIGINT, NULL) < 0)
429 pa_log(__FILE__": failed to kill daemon.");
436 assert(conf->cmd == PA_CMD_DAEMON);
439 if (real_root && !conf->system_instance) {
440 pa_log_warn(__FILE__": This program is not intended to be run as root (unless --system is specified).");
441 } else if (!real_root && conf->system_instance) {
442 pa_log(__FILE__": Root priviliges required.");
446 if (conf->daemonize) {
450 if (pa_stdio_acquire() < 0) {
451 pa_log(__FILE__": failed to acquire stdio.");
456 if (pipe(daemon_pipe) < 0) {
457 pa_log(__FILE__": failed to create pipe.");
461 if ((child = fork()) < 0) {
462 pa_log(__FILE__": fork() failed: %s", pa_cstrerror(errno));
469 close(daemon_pipe[1]);
472 if (pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL) != sizeof(retval)) {
473 pa_log(__FILE__": read() failed: %s", pa_cstrerror(errno));
478 pa_log(__FILE__": daemon startup failed.");
480 pa_log_info(__FILE__": daemon startup successful.");
485 close(daemon_pipe[0]);
489 if (conf->auto_log_target)
490 pa_log_set_target(PA_LOG_SYSLOG, NULL);
504 open("/dev/null", O_RDONLY);
505 open("/dev/null", O_WRONLY);
506 open("/dev/null", O_WRONLY);
512 signal(SIGTTOU, SIG_IGN);
515 signal(SIGTTIN, SIG_IGN);
518 signal(SIGTSTP, SIG_IGN);
522 if ((tty_fd = open("/dev/tty", O_RDWR)) >= 0) {
523 ioctl(tty_fd, TIOCNOTTY, (char*) 0);
532 if (conf->system_instance) {
533 if (change_user() < 0)
535 } else if (create_runtime_dir() < 0)
538 if (conf->use_pid_file) {
539 if (pa_pid_file_create() < 0) {
540 pa_log(__FILE__": pa_pid_file_create() failed.");
543 pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
551 #ifdef HAVE_SYS_RESOURCE_H
552 set_all_rlimits(conf);
556 signal(SIGPIPE, SIG_IGN);
559 mainloop = pa_mainloop_new();
562 c = pa_core_new(pa_mainloop_get_api(mainloop), 1);
564 c->is_system_instance = !!conf->system_instance;
566 r = pa_signal_init(pa_mainloop_get_api(mainloop));
568 pa_signal_new(SIGINT, signal_callback, c);
569 pa_signal_new(SIGTERM, signal_callback, c);
572 pa_signal_new(SIGUSR1, signal_callback, c);
575 pa_signal_new(SIGUSR2, signal_callback, c);
578 pa_signal_new(SIGHUP, signal_callback, c);
582 timer = pa_mainloop_get_api(mainloop)->time_new(
583 pa_mainloop_get_api(mainloop), pa_gettimeofday(&tv), message_cb, NULL);
588 c->running_as_daemon = 1;
592 if (!conf->no_cpu_limit) {
593 r = pa_cpu_limit_init(pa_mainloop_get_api(mainloop));
597 buf = pa_strbuf_new();
598 if (conf->default_script_file)
599 r = pa_cli_command_execute_file(c, conf->default_script_file, buf, &conf->fail);
602 r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail);
603 pa_log_error("%s", s = pa_strbuf_tostring_free(buf));
606 if (r < 0 && conf->fail) {
607 pa_log(__FILE__": failed to initialize daemon.");
610 pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
612 } else if (!c->modules || pa_idxset_size(c->modules) == 0) {
613 pa_log(__FILE__": daemon startup without any loaded modules, refusing to work.");
616 pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
623 pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL);
626 c->disallow_module_loading = conf->disallow_module_loading;
627 c->exit_idle_time = conf->exit_idle_time;
628 c->module_idle_time = conf->module_idle_time;
629 c->scache_idle_time = conf->scache_idle_time;
630 c->resample_method = conf->resample_method;
632 if (c->default_sink_name &&
633 pa_namereg_get(c, c->default_sink_name, PA_NAMEREG_SINK, 1) == NULL) {
634 pa_log_error("%s : Fatal error. Default sink name (%s) does not exist in name register.", __FILE__, c->default_sink_name);
637 pa_log_info(__FILE__": Daemon startup complete.");
638 if (pa_mainloop_run(mainloop, &retval) < 0)
640 pa_log_info(__FILE__": Daemon shutdown initiated.");
645 pa_mainloop_get_api(mainloop)->time_free(timer);
650 if (!conf->no_cpu_limit)
654 pa_mainloop_free(mainloop);
656 pa_log_info(__FILE__": Daemon terminated.");
661 pa_daemon_conf_free(conf);
664 pa_pid_file_remove();
666 close_pipe(daemon_pipe);