/*** This file is part of PulseAudio. Copyright 2004-2006 Lennart Poettering Copyright 2006 Pierre Ossman 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 2.1 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, see . ***/ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_SYS_MMAN_H #include #endif #ifdef HAVE_PWD_H #include #endif #ifdef HAVE_GRP_H #include #endif #ifdef HAVE_LIBWRAP #include #include #endif #ifdef HAVE_DBUS #include #endif #ifdef HAVE_SYSTEMD_DAEMON #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_DBUS #include #endif #include #include "cmdline.h" #include "cpulimit.h" #include "daemon-conf.h" #include "dumpmodules.h" #include "caps.h" #include "ltdl-bind-now.h" #include "server-lookup.h" #ifdef DISABLE_LIBTOOL_PRELOAD /* FIXME: work around a libtool bug by making sure we have 2 elements. Bug has * been reported: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=29576 */ const lt_dlsymlist lt_preloaded_symbols[] = { { "@PROGRAM@", NULL }, { NULL, NULL } }; #endif #ifdef HAVE_LIBWRAP /* Only one instance of these variables */ int allow_severity = LOG_INFO; int deny_severity = LOG_WARNING; #endif #ifdef HAVE_OSS_WRAPPER /* 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 static void signal_callback(pa_mainloop_api* m, pa_signal_event *e, int sig, void *userdata) { pa_module *module = NULL; pa_log_info("Got signal %s.", pa_sig2str(sig)); switch (sig) { #ifdef SIGUSR1 case SIGUSR1: pa_module_load(&module, userdata, "module-cli", NULL); break; #endif #ifdef SIGUSR2 case SIGUSR2: pa_module_load(&module, 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, 0); break; } } #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 (!pa_streq(pw->pw_dir, PA_SYSTEM_RUNTIME_PATH)) pa_log_warn(_("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, true) < 0) { pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_RUNTIME_PATH, pa_cstrerror(errno)); return -1; } if (pa_make_secure_dir(PA_SYSTEM_STATE_PATH, 0700, pw->pw_uid, gr->gr_gid, true) < 0) { pa_log(_("Failed to create '%s': %s"), PA_SYSTEM_STATE_PATH, pa_cstrerror(errno)); return -1; } /* We don't create the config dir here, because we don't need to write to it */ 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 privileges" #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 privileges" #endif if (r < 0) { pa_log(_("Failed to change UID: %s"), pa_cstrerror(errno)); return -1; } pa_drop_caps(); pa_set_env("USER", PA_SYSTEM_USER); pa_set_env("USERNAME", PA_SYSTEM_USER); pa_set_env("LOGNAME", PA_SYSTEM_USER); pa_set_env("HOME", PA_SYSTEM_RUNTIME_PATH); /* Relevant for pa_runtime_path() */ if (!getenv("PULSE_RUNTIME_PATH")) pa_set_env("PULSE_RUNTIME_PATH", PA_SYSTEM_RUNTIME_PATH); if (!getenv("PULSE_CONFIG_PATH")) pa_set_env("PULSE_CONFIG_PATH", PA_SYSTEM_CONFIG_PATH); if (!getenv("PULSE_STATE_PATH")) pa_set_env("PULSE_STATE_PATH", PA_SYSTEM_STATE_PATH); pa_log_info("Successfully changed user to \"" PA_SYSTEM_USER "\"."); 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 */ #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_info("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_fsize, RLIMIT_FSIZE, "RLIMIT_FSIZE"); set_one_rlimit(&conf->rlimit_data, RLIMIT_DATA, "RLIMIT_DATA"); set_one_rlimit(&conf->rlimit_stack, RLIMIT_STACK, "RLIMIT_STACK"); set_one_rlimit(&conf->rlimit_core, RLIMIT_CORE, "RLIMIT_CORE"); #ifdef RLIMIT_RSS set_one_rlimit(&conf->rlimit_rss, RLIMIT_RSS, "RLIMIT_RSS"); #endif #ifdef RLIMIT_NPROC set_one_rlimit(&conf->rlimit_nproc, RLIMIT_NPROC, "RLIMIT_NPROC"); #endif #ifdef RLIMIT_NOFILE set_one_rlimit(&conf->rlimit_nofile, RLIMIT_NOFILE, "RLIMIT_NOFILE"); #endif #ifdef RLIMIT_MEMLOCK set_one_rlimit(&conf->rlimit_memlock, RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK"); #endif #ifdef RLIMIT_AS set_one_rlimit(&conf->rlimit_as, RLIMIT_AS, "RLIMIT_AS"); #endif #ifdef RLIMIT_LOCKS set_one_rlimit(&conf->rlimit_locks, RLIMIT_LOCKS, "RLIMIT_LOCKS"); #endif #ifdef RLIMIT_SIGPENDING set_one_rlimit(&conf->rlimit_sigpending, RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING"); #endif #ifdef RLIMIT_MSGQUEUE set_one_rlimit(&conf->rlimit_msgqueue, RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE"); #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 #ifdef RLIMIT_RTTIME set_one_rlimit(&conf->rlimit_rttime, RLIMIT_RTTIME, "RLIMIT_RTTIME"); #endif } #endif static char *check_configured_address(void) { char *default_server = NULL; pa_client_conf *c = pa_client_conf_new(); pa_client_conf_load(c, true, true); if (c->default_server && *c->default_server) default_server = pa_xstrdup(c->default_server); pa_client_conf_free(c); return default_server; } #ifdef HAVE_DBUS static pa_dbus_connection *register_dbus_name(pa_core *c, DBusBusType bus, const char* name) { DBusError error; pa_dbus_connection *conn; dbus_error_init(&error); if (!(conn = pa_dbus_bus_get(c, bus, &error)) || dbus_error_is_set(&error)) { pa_log_warn("Unable to contact D-Bus: %s: %s", error.name, error.message); goto fail; } if (dbus_bus_request_name(pa_dbus_connection_get(conn), name, DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) == DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) { pa_log_debug("Got %s!", name); return conn; } if (dbus_error_is_set(&error)) pa_log_error("Failed to acquire %s: %s: %s", name, error.name, error.message); else pa_log_error("D-Bus name %s already taken.", name); /* PA cannot be started twice by the same user and hence we can * ignore mostly the case that a name is already taken. */ fail: if (conn) pa_dbus_connection_unref(conn); dbus_error_free(&error); return NULL; } #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; char *configured_address; int r = 0, retval = 1, d = 0; bool valid_pid_file = false; bool ltdl_init = false; int n_fds = 0, *passed_fds = NULL; const char *e; #ifdef HAVE_FORK int daemon_pipe[2] = { -1, -1 }; int daemon_pipe2[2] = { -1, -1 }; #endif int autospawn_fd = -1; bool autospawn_locked = false; #ifdef HAVE_DBUS pa_dbusobj_server_lookup *server_lookup = NULL; /* /org/pulseaudio/server_lookup */ pa_dbus_connection *lookup_service_bus = NULL; /* Always the user bus. */ pa_dbus_connection *server_bus = NULL; /* The bus where we reserve org.pulseaudio.Server, either the user or the system bus. */ bool start_server; #endif pa_log_set_ident("pulseaudio"); pa_log_set_level(PA_LOG_NOTICE); pa_log_set_flags(PA_LOG_COLORS|PA_LOG_PRINT_FILE|PA_LOG_PRINT_LEVEL, PA_LOG_RESET); #if !defined(HAVE_BIND_NOW) && 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. This all is admittedly a bit snake-oilish. */ if (!getenv("LD_BIND_NOW")) { char *rp; char *canonical_rp; /* We have to execute ourselves, because the libc caches the * value of $LD_BIND_NOW on initialization. */ pa_set_env("LD_BIND_NOW", "1"); if ((canonical_rp = pa_realpath(PA_BINARY))) { if ((rp = pa_readlink("/proc/self/exe"))) { if (pa_streq(rp, canonical_rp)) pa_assert_se(execv(rp, argv) == 0); else pa_log_warn("/proc/self/exe does not point to %s, cannot self execute. Are you playing games?", canonical_rp); pa_xfree(rp); } else pa_log_warn("Couldn't read /proc/self/exe, cannot self execute. Running in a chroot()?"); pa_xfree(canonical_rp); } else pa_log_warn("Couldn't canonicalize binary path, cannot self execute."); } #endif #ifdef HAVE_SYSTEMD_DAEMON n_fds = sd_listen_fds(0); if (n_fds > 0) { int i = n_fds; passed_fds = pa_xnew(int, n_fds+2); passed_fds[n_fds] = passed_fds[n_fds+1] = -1; while (i--) passed_fds[i] = SD_LISTEN_FDS_START + i; } #endif if (!passed_fds) { n_fds = 0; passed_fds = pa_xnew(int, 2); passed_fds[0] = passed_fds[1] = -1; } if ((e = getenv("PULSE_PASSED_FD"))) { int passed_fd = atoi(e); if (passed_fd > 2) passed_fds[n_fds] = passed_fd; } /* We might be autospawned, in which case have no idea in which * context we have been started. Let's cleanup our execution * context as good as possible */ pa_reset_personality(); pa_drop_root(); pa_close_allv(passed_fds); pa_xfree(passed_fds); pa_reset_sigs(-1); pa_unblock_sigs(-1); pa_reset_priority(); setlocale(LC_ALL, ""); pa_init_i18n(); 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; } if (conf->log_target) pa_log_set_target(conf->log_target); else { pa_log_target target = { .type = PA_LOG_STDERR, .file = NULL }; pa_log_set_target(&target); } pa_log_set_level(conf->log_level); if (conf->log_meta) pa_log_set_flags(PA_LOG_PRINT_META, PA_LOG_SET); if (conf->log_time) pa_log_set_flags(PA_LOG_PRINT_TIME, PA_LOG_SET); pa_log_set_show_backtrace(conf->log_backtrace); #ifdef HAVE_DBUS /* conf->system_instance and conf->local_server_type control almost the * same thing; make them agree about what is requested. */ switch (conf->local_server_type) { case PA_SERVER_TYPE_UNSET: conf->local_server_type = conf->system_instance ? PA_SERVER_TYPE_SYSTEM : PA_SERVER_TYPE_USER; break; case PA_SERVER_TYPE_USER: case PA_SERVER_TYPE_NONE: conf->system_instance = false; break; case PA_SERVER_TYPE_SYSTEM: conf->system_instance = true; break; default: pa_assert_not_reached(); } start_server = conf->local_server_type == PA_SERVER_TYPE_USER || (getuid() == 0 && conf->local_server_type == PA_SERVER_TYPE_SYSTEM); if (!start_server && conf->local_server_type == PA_SERVER_TYPE_SYSTEM) { pa_log_notice(_("System mode refused for non-root user. Only starting the D-Bus server lookup service.")); conf->system_instance = false; } #endif 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: { if (d < argc) { pa_log("Too many arguments."); goto finish; } s = pa_daemon_conf_dump(conf); fputs(s, stdout); pa_xfree(s); retval = 0; goto finish; } case PA_CMD_DUMP_RESAMPLE_METHODS: { int i; if (d < argc) { pa_log("Too many arguments."); goto finish; } for (i = 0; i < PA_RESAMPLER_MAX; i++) if (pa_resample_method_supported(i)) printf("%s\n", pa_resample_method_to_string(i)); retval = 0; goto finish; } case PA_CMD_HELP : pa_cmdline_help(argv[0]); retval = 0; goto finish; case PA_CMD_VERSION : if (d < argc) { pa_log("Too many arguments."); goto finish; } printf(PACKAGE_NAME" "PACKAGE_VERSION"\n"); retval = 0; goto finish; case PA_CMD_CHECK: { pid_t pid; if (d < argc) { pa_log("Too many arguments."); goto finish; } 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 (d < argc) { pa_log("Too many arguments."); goto finish; } if (pa_pid_file_kill(SIGINT, NULL, "pulseaudio") < 0) pa_log(_("Failed to kill daemon: %s"), pa_cstrerror(errno)); else retval = 0; goto finish; case PA_CMD_CLEANUP_SHM: if (d < argc) { pa_log("Too many arguments."); goto finish; } if (pa_shm_cleanup() >= 0) retval = 0; goto finish; default: pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START); } if (d < argc) { pa_log("Too many arguments."); goto finish; } #ifdef HAVE_GETUID if (getuid() == 0 && !conf->system_instance) pa_log_warn(_("This program is not intended to be run as root (unless --system is specified).")); #ifndef HAVE_DBUS /* A similar, only a notice worthy check was done earlier, if D-Bus is enabled. */ else if (getuid() != 0 && conf->system_instance) { pa_log(_("Root privileges required.")); goto finish; } #endif #endif /* HAVE_GETUID */ if (conf->cmd == PA_CMD_START && conf->system_instance) { pa_log(_("--start not supported for system instances.")); goto finish; } if (conf->cmd == PA_CMD_START && (configured_address = check_configured_address())) { /* There is an server address in our config, but where did it come from? * By default a standard X11 login will load module-x11-publish which will * inject PULSE_SERVER X11 property. If the PA daemon crashes, we will end * up hitting this code path. So we have to check to see if our configured_address * is the same as the value that would go into this property so that we can * recover (i.e. autospawn) from a crash. */ char *ufn; bool start_anyway = false; if ((ufn = pa_runtime_path(PA_NATIVE_DEFAULT_UNIX_SOCKET))) { char *id; if ((id = pa_machine_id())) { pa_strlist *server_list; char formatted_ufn[256]; pa_snprintf(formatted_ufn, sizeof(formatted_ufn), "{%s}unix:%s", id, ufn); pa_xfree(id); if ((server_list = pa_strlist_parse(configured_address))) { char *u = NULL; /* We only need to check the first server */ server_list = pa_strlist_pop(server_list, &u); pa_strlist_free(server_list); start_anyway = (u && pa_streq(formatted_ufn, u)); pa_xfree(u); } } pa_xfree(ufn); } if (!start_anyway) { pa_log_notice(_("User-configured server at %s, refusing to start/autospawn."), configured_address); pa_xfree(configured_address); retval = 0; goto finish; } pa_log_notice(_("User-configured server at %s, which appears to be local. Probing deeper."), configured_address); pa_xfree(configured_address); } if (conf->system_instance && !conf->disallow_exit) pa_log_warn(_("Running in system mode, but --disallow-exit not set.")); if (conf->system_instance && !conf->disallow_module_loading) pa_log_warn(_("Running in system mode, but --disallow-module-loading not set.")); if (conf->system_instance && !conf->disable_shm) { pa_log_notice(_("Running in system mode, forcibly disabling SHM mode.")); conf->disable_shm = true; } if (conf->system_instance && conf->exit_idle_time >= 0) { pa_log_notice(_("Running in system mode, forcibly disabling exit idle time.")); conf->exit_idle_time = -1; } if (conf->cmd == PA_CMD_START) { /* If we shall start PA only when it is not running yet, we * first take the autospawn lock to make things * synchronous. */ /* This locking and thread synchronisation code doesn't work reliably * on kFreeBSD (Debian bug #705435), or in upstream FreeBSD ports * (bug reference: ports/128947, patched in SVN r231972). */ #if !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) if ((autospawn_fd = pa_autospawn_lock_init()) < 0) { pa_log("Failed to initialize autospawn lock"); goto finish; } if ((pa_autospawn_lock_acquire(true) < 0)) { pa_log("Failed to acquire autospawn lock"); goto finish; } autospawn_locked = true; #endif } if (conf->daemonize) { #ifdef HAVE_FORK pid_t child; #endif if (pa_stdio_acquire() < 0) { pa_log(_("Failed to acquire stdio.")); goto finish; } #ifdef HAVE_FORK if (pipe(daemon_pipe) < 0) { pa_log(_("pipe() failed: %s"), pa_cstrerror(errno)); goto finish; } if ((child = fork()) < 0) { pa_log(_("fork() failed: %s"), pa_cstrerror(errno)); pa_close_pipe(daemon_pipe); goto finish; } if (child != 0) { ssize_t n; /* Father */ pa_assert_se(pa_close(daemon_pipe[1]) == 0); daemon_pipe[1] = -1; if ((n = pa_loop_read(daemon_pipe[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) { if (n < 0) 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; } if (autospawn_fd >= 0) { /* The lock file is unlocked from the parent, so we need * to close it in the child */ pa_autospawn_lock_release(); pa_autospawn_lock_done(true); autospawn_locked = false; autospawn_fd = -1; } pa_assert_se(pa_close(daemon_pipe[0]) == 0); daemon_pipe[0] = -1; #endif if (!conf->log_target) { #ifdef HAVE_SYSTEMD_JOURNAL pa_log_target target = { .type = PA_LOG_JOURNAL, .file = NULL }; #else pa_log_target target = { .type = PA_LOG_SYSLOG, .file = NULL }; #endif pa_log_set_target(&target); } #ifdef HAVE_SETSID if (setsid() < 0) { pa_log(_("setsid() failed: %s"), pa_cstrerror(errno)); goto finish; } #endif #ifdef HAVE_FORK /* We now are a session and process group leader. Let's fork * again and let the father die, so that we'll become a * process that can never acquire a TTY again, in a session and * process group without leader */ if (pipe(daemon_pipe2) < 0) { pa_log(_("pipe() failed: %s"), pa_cstrerror(errno)); goto finish; } if ((child = fork()) < 0) { pa_log(_("fork() failed: %s"), pa_cstrerror(errno)); pa_close_pipe(daemon_pipe2); goto finish; } if (child != 0) { ssize_t n; /* Father */ pa_assert_se(pa_close(daemon_pipe2[1]) == 0); daemon_pipe2[1] = -1; if ((n = pa_loop_read(daemon_pipe2[0], &retval, sizeof(retval), NULL)) != sizeof(retval)) { if (n < 0) pa_log(_("read() failed: %s"), pa_cstrerror(errno)); retval = 1; } /* We now have to take care of signalling the first fork with * the return value we've received from this fork... */ pa_assert(daemon_pipe[1] >= 0); pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL); pa_close(daemon_pipe[1]); daemon_pipe[1] = -1; goto finish; } pa_assert_se(pa_close(daemon_pipe2[0]) == 0); daemon_pipe2[0] = -1; /* We no longer need the (first) daemon_pipe as it's handled in our child above */ pa_close_pipe(daemon_pipe); #endif #ifdef SIGTTOU signal(SIGTTOU, SIG_IGN); #endif #ifdef SIGTTIN signal(SIGTTIN, SIG_IGN); #endif #ifdef SIGTSTP signal(SIGTSTP, SIG_IGN); #endif pa_nullify_stdfds(); } pa_set_env_and_record("PULSE_INTERNAL", "1"); pa_assert_se(chdir("/") == 0); umask(0077); #ifdef HAVE_SYS_RESOURCE_H set_all_rlimits(conf); #endif pa_rtclock_hrtimer_enable(); if (conf->high_priority) pa_raise_priority(conf->nice_level); if (conf->system_instance) if (change_user() < 0) goto finish; pa_set_env_and_record("PULSE_SYSTEM", conf->system_instance ? "1" : "0"); pa_log_info("This is PulseAudio %s", PACKAGE_VERSION); pa_log_debug("Compilation CFLAGS: %s", PA_CFLAGS); #ifdef HAVE_LIBSAMPLERATE pa_log_warn("Compiled with DEPRECATED libsamplerate support!"); #endif s = pa_uname_string(); pa_log_debug("Running on host: %s", s); pa_xfree(s); pa_log_debug("Found %u CPUs.", pa_ncpus()); pa_log_info("Page size is %zu bytes", pa_page_size()); #ifdef HAVE_VALGRIND_MEMCHECK_H pa_log_debug("Compiled with Valgrind support: yes"); #else pa_log_debug("Compiled with Valgrind support: no"); #endif pa_log_debug("Running in valgrind mode: %s", pa_yes_no(pa_in_valgrind())); pa_log_debug("Running in VM: %s", pa_yes_no(pa_running_in_vm())); #ifdef HAVE_RUNNING_FROM_BUILD_TREE pa_log_debug("Running from build tree: %s", pa_yes_no(pa_run_from_build_tree())); #else pa_log_debug("Running from build tree: no"); #endif #ifdef __OPTIMIZE__ pa_log_debug("Optimized build: yes"); #else pa_log_debug("Optimized build: no"); #endif #ifdef NDEBUG pa_log_debug("NDEBUG defined, all asserts disabled."); #elif defined(FASTPATH) pa_log_debug("FASTPATH defined, only fast path asserts disabled."); #else pa_log_debug("All asserts enabled."); #endif if (!(s = pa_machine_id())) { pa_log(_("Failed to get machine ID")); goto finish; } pa_log_info("Machine ID is %s.", s); pa_xfree(s); if ((s = pa_session_id())) { pa_log_info("Session ID is %s.", s); pa_xfree(s); } if (!(s = pa_get_runtime_dir())) goto finish; pa_log_info("Using runtime directory %s.", s); pa_xfree(s); if (!(s = pa_get_state_dir())) goto finish; pa_log_info("Using state directory %s.", s); pa_xfree(s); pa_log_info("Using modules directory %s.", conf->dl_search_path); pa_log_info("Running in system mode: %s", pa_yes_no(pa_in_system_mode())); if (pa_in_system_mode()) pa_log_warn(_("OK, so you are running PA in system mode. Please make sure that you actually do want to do that.\n" "Please read http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/WhatIsWrongWithSystemWide/ for an explanation why system mode is usually a bad idea.")); if (conf->use_pid_file) { int z; if ((z = pa_pid_file_create("pulseaudio")) != 0) { if (conf->cmd == PA_CMD_START && z > 0) { /* If we are already running and with are run in * --start mode, then let's return this as success. */ retval = 0; goto finish; } pa_log(_("pa_pid_file_create() failed.")); goto finish; } valid_pid_file = true; } pa_disable_sigpipe(); if (pa_rtclock_hrtimer()) pa_log_info("System supports high resolution timers"); else pa_log_info("System appears to not support high resolution timers"); if (conf->lock_memory) { #if defined(HAVE_SYS_MMAN_H) && !defined(__ANDROID__) if (mlockall(MCL_FUTURE) < 0) pa_log_warn("mlockall() failed: %s", pa_cstrerror(errno)); else pa_log_info("Successfully locked process into memory."); #else pa_log_warn("Memory locking requested but not supported on platform."); #endif } pa_memtrap_install(); pa_assert_se(mainloop = pa_mainloop_new()); if (!(c = pa_core_new(pa_mainloop_get_api(mainloop), !conf->disable_shm, !conf->disable_shm && !conf->disable_memfd && pa_memfd_is_locally_supported(), conf->shm_size))) { pa_log(_("pa_core_new() failed.")); goto finish; } c->default_sample_spec = conf->default_sample_spec; c->alternate_sample_rate = conf->alternate_sample_rate; c->default_channel_map = conf->default_channel_map; c->default_n_fragments = conf->default_n_fragments; c->default_fragment_size_msec = conf->default_fragment_size_msec; c->deferred_volume_safety_margin_usec = conf->deferred_volume_safety_margin_usec; c->deferred_volume_extra_delay_usec = conf->deferred_volume_extra_delay_usec; c->lfe_crossover_freq = conf->lfe_crossover_freq; c->exit_idle_time = conf->exit_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->avoid_resampling = conf->avoid_resampling; c->disable_remixing = conf->disable_remixing; c->remixing_use_all_sink_channels = conf->remixing_use_all_sink_channels; c->remixing_produce_lfe = conf->remixing_produce_lfe; c->remixing_consume_lfe = conf->remixing_consume_lfe; c->deferred_volume = conf->deferred_volume; c->running_as_daemon = conf->daemonize; c->disallow_exit = conf->disallow_exit; c->flat_volumes = conf->flat_volumes; c->rescue_streams = conf->rescue_streams; #ifdef HAVE_DBUS c->server_type = conf->local_server_type; #endif pa_core_check_idle(c); c->state = PA_CORE_RUNNING; pa_cpu_init(&c->cpu_info); 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 if (!conf->no_cpu_limit) pa_assert_se(pa_cpu_limit_init(pa_mainloop_get_api(mainloop)) == 0); buf = pa_strbuf_new(); #ifdef HAVE_DBUS pa_assert_se(dbus_threads_init_default()); if (start_server) #endif { const char *command_source = NULL; if (conf->load_default_script_file) { FILE *f; if ((f = pa_daemon_conf_open_default_script_file(conf))) { r = pa_cli_command_execute_file_stream(c, f, buf, &conf->fail); fclose(f); command_source = pa_daemon_conf_get_default_script_file(conf); } } if (r >= 0) { r = pa_cli_command_execute(c, conf->script_commands, buf, &conf->fail); command_source = _("command line arguments"); } pa_log_error("%s", s = pa_strbuf_to_string_free(buf)); pa_xfree(s); if (r < 0 && conf->fail) { pa_log(_("Failed to initialize daemon due to errors while executing startup commands. Source of commands: %s"), command_source); goto finish; } if (!c->modules || pa_idxset_size(c->modules) == 0) { pa_log(_("Daemon startup without any loaded modules, refusing to work.")); goto finish; } #ifdef HAVE_DBUS } else { /* When we just provide the D-Bus server lookup service, we don't want * any modules to be loaded. We haven't loaded any so far, so one might * think there's no way to contact the server, but receiving certain * signals could still cause modules to load. */ conf->disallow_module_loading = true; #endif } /* We completed the initial module loading, so let's disable it * from now on, if requested */ c->disallow_module_loading = conf->disallow_module_loading; #ifdef HAVE_DBUS if (!conf->system_instance) { if ((server_lookup = pa_dbusobj_server_lookup_new(c))) { if (!(lookup_service_bus = register_dbus_name(c, DBUS_BUS_SESSION, "org.PulseAudio1"))) goto finish; } } if (start_server) server_bus = register_dbus_name(c, conf->system_instance ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, "org.pulseaudio.Server"); #endif #ifdef HAVE_FORK if (daemon_pipe2[1] >= 0) { int ok = 0; pa_loop_write(daemon_pipe2[1], &ok, sizeof(ok), NULL); pa_close(daemon_pipe2[1]); daemon_pipe2[1] = -1; } #endif pa_log_info("Daemon startup complete."); #ifdef HAVE_SYSTEMD_DAEMON sd_notify(0, "READY=1"); #endif retval = 0; if (pa_mainloop_run(mainloop, &retval) < 0) goto finish; pa_log_info("Daemon shutdown initiated."); #ifdef HAVE_SYSTEMD_DAEMON sd_notify(0, "STOPPING=1"); #endif finish: #ifdef HAVE_DBUS if (server_bus) pa_dbus_connection_unref(server_bus); if (lookup_service_bus) pa_dbus_connection_unref(lookup_service_bus); if (server_lookup) pa_dbusobj_server_lookup_free(server_lookup); #endif if (autospawn_fd >= 0) { if (autospawn_locked) pa_autospawn_lock_release(); pa_autospawn_lock_done(false); } if (c) { /* Ensure all the modules/samples are unloaded when the core is still ref'ed, * as unlink callback hooks in modules may need the core to be ref'ed */ pa_module_unload_all(c); pa_scache_free_all(c); pa_core_unref(c); pa_log_info("Daemon terminated."); } if (!conf->no_cpu_limit) pa_cpu_limit_done(); pa_signal_done(); #ifdef HAVE_FORK /* If we have daemon_pipe[1] still open, this means we've failed after * the first fork, but before the second. Therefore just write to it. */ if (daemon_pipe[1] >= 0) pa_loop_write(daemon_pipe[1], &retval, sizeof(retval), NULL); else if (daemon_pipe2[1] >= 0) pa_loop_write(daemon_pipe2[1], &retval, sizeof(retval), NULL); pa_close_pipe(daemon_pipe2); pa_close_pipe(daemon_pipe); #endif if (mainloop) pa_mainloop_free(mainloop); if (conf) pa_daemon_conf_free(conf); if (valid_pid_file) pa_pid_file_remove(); /* This has no real purpose except making things valgrind-clean */ pa_unset_env_recorded(); #ifdef OS_IS_WIN32 WSACleanup(); #endif if (ltdl_init) pa_ltdl_done(); #ifdef HAVE_DBUS dbus_shutdown(); #endif return retval; }