diff options
Diffstat (limited to 'src/daemon/main.c')
| -rw-r--r-- | src/daemon/main.c | 308 |
1 files changed, 114 insertions, 194 deletions
diff --git a/src/daemon/main.c b/src/daemon/main.c index 0048e7b7..07439675 100644 --- a/src/daemon/main.c +++ b/src/daemon/main.c @@ -37,9 +37,14 @@ #include <unistd.h> #include <locale.h> #include <sys/types.h> +#include <sys/stat.h> #include <liboil/liboil.h> +#ifdef HAVE_SYS_MMAN_H +#include <sys/mman.h> +#endif + #ifdef HAVE_SYS_IOCTL_H #include <sys/ioctl.h> #endif @@ -69,6 +74,7 @@ #include <pulsecore/lock-autospawn.h> #include <pulsecore/winsock.h> #include <pulsecore/core-error.h> +#include <pulsecore/core-rtclock.h> #include <pulsecore/core.h> #include <pulsecore/memblock.h> #include <pulsecore/module.h> @@ -80,13 +86,15 @@ #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 <pulsecore/memtrap.h> +#ifdef HAVE_DBUS +#include <pulsecore/dbus-shared.h> +#endif #include "cmdline.h" #include "cpulimit.h" @@ -94,7 +102,6 @@ #include "dumpmodules.h" #include "caps.h" #include "ltdl-bind-now.h" -#include "polkit.h" #ifdef HAVE_LIBWRAP /* Only one instance of these variables */ @@ -125,7 +132,7 @@ static void message_cb(pa_mainloop_api*a, pa_time_event*e, const struct timeval } pa_timeval_add(pa_gettimeofday(&tvnext), 100000); - a->time_restart(e, &tvnext); + a->rtclock_time_restart(e, &tvnext); } #endif @@ -330,6 +337,42 @@ static void set_all_rlimits(const pa_daemon_conf *conf) { } #endif +#ifdef HAVE_DBUS +static pa_dbus_connection *register_dbus(pa_core *c) { + DBusError error; + pa_dbus_connection *conn; + + dbus_error_init(&error); + + if (!(conn = pa_dbus_bus_get(c, pa_in_system_mode() ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, &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), "org.pulseaudio.Server", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) == DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) { + pa_log_debug("Got org.pulseaudio.Server!"); + return conn; + } + + if (dbus_error_is_set(&error)) + pa_log_warn("Failed to acquire org.pulseaudio.Server: %s: %s", error.name, error.message); + else + pa_log_warn("D-Bus name org.pulseaudio.Server already taken. Weird shit!"); + + /* PA cannot be started twice by the same user and hence we can + * ignore mostly the case that org.pulseaudio.Server 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; @@ -337,9 +380,7 @@ int main(int argc, char *argv[]) { pa_mainloop *mainloop = NULL; char *s; int r = 0, retval = 1, d = 0; - pa_bool_t suid_root, real_root; pa_bool_t valid_pid_file = FALSE; - gid_t gid = (gid_t) -1; pa_bool_t ltdl_init = FALSE; int passed_fd = -1; const char *e; @@ -352,16 +393,20 @@ int main(int argc, char *argv[]) { #endif int autospawn_fd = -1; pa_bool_t autospawn_locked = FALSE; +#ifdef HAVE_DBUS + pa_dbus_connection *dbus = NULL; +#endif pa_log_set_ident("pulseaudio"); - pa_log_set_level(PA_LOG_INFO); + 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(__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. + a check whether we are a debug build or not. This all is + admittedly a bit snake-oilish. */ if (!getenv("LD_BIND_NOW")) { @@ -372,36 +417,19 @@ int main(int argc, char *argv[]) { pa_set_env("LD_BIND_NOW", "1"); - if ((rp = pa_readlink("/proc/self/exe"))) - pa_assert_se(execv(rp, argv) == 0); - else - pa_log_warn("Couldn't read /proc/self/exe, cannot self execute. Running in a chroot()?"); - } -#endif - -#ifdef HAVE_GETUID - real_root = getuid() == 0; - suid_root = !real_root && geteuid() == 0; -#else - real_root = FALSE; - suid_root = FALSE; -#endif - - if (!real_root) { - /* Drop all capabilities except CAP_SYS_NICE */ - pa_limit_caps(); + if ((rp = pa_readlink("/proc/self/exe"))) { - /* Drop privileges, but keep CAP_SYS_NICE */ - pa_drop_root(); + if (pa_streq(rp, PA_BINARY)) + pa_assert_se(execv(rp, argv) == 0); + else + pa_log_warn("/proc/self/exe does not point to " PA_BINARY ", cannot self execute. Are you playing games?"); - /* After dropping root, the effective set is reset, hence, - * let's raise it again */ - pa_limit_caps(); + pa_xfree(rp); - /* 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. */ + } else + pa_log_warn("Couldn't read /proc/self/exe, cannot self execute. Running in a chroot()?"); } +#endif if ((e = getenv("PULSE_PASSED_FD"))) { passed_fd = atoi(e); @@ -410,15 +438,14 @@ int main(int argc, char *argv[]) { passed_fd = -1; } + /* 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_drop_root(); pa_close_all(passed_fd, -1); - pa_reset_sigs(-1); pa_unblock_sigs(-1); - /* 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_init_i18n(); @@ -443,150 +470,6 @@ int main(int argc, char *argv[]) { pa_log_set_flags(PA_LOG_PRINT_TIME, PA_LOG_SET); pa_log_set_show_backtrace(conf->log_backtrace); - pa_log_debug("Started as real root: %s, suid root: %s", pa_yes_no(real_root), pa_yes_no(suid_root)); - - if (!real_root && pa_have_caps()) { -#ifdef HAVE_SYS_RESOURCE_H - struct rlimit rl; -#endif - pa_bool_t allow_high_priority = FALSE, allow_realtime = FALSE; - - /* Let's better not enable high prio or RT by default */ - - if (conf->high_priority && !allow_high_priority) { - if (pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) { - pa_log_info(_("We're in the group '%s', allowing high-priority scheduling."), PA_REALTIME_GROUP); - allow_high_priority = TRUE; - } - } - - if (conf->realtime_scheduling && !allow_realtime) { - if (pa_own_uid_in_group(PA_REALTIME_GROUP, &gid) > 0) { - pa_log_info(_("We're in the group '%s', allowing real-time scheduling."), PA_REALTIME_GROUP); - allow_realtime = TRUE; - } - } - -#ifdef HAVE_POLKIT - if (conf->high_priority && !allow_high_priority) { - if (pa_polkit_check("org.pulseaudio.acquire-high-priority") > 0) { - pa_log_info(_("PolicyKit grants us acquire-high-priority privilege.")); - allow_high_priority = TRUE; - } else - pa_log_info(_("PolicyKit refuses acquire-high-priority privilege.")); - } - - if (conf->realtime_scheduling && !allow_realtime) { - if (pa_polkit_check("org.pulseaudio.acquire-real-time") > 0) { - pa_log_info(_("PolicyKit grants us acquire-real-time privilege.")); - allow_realtime = TRUE; - } else - pa_log_info(_("PolicyKit refuses acquire-real-time privilege.")); - } -#endif - - 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(); - } - -#ifdef RLIMIT_RTPRIO - if (getrlimit(RLIMIT_RTPRIO, &rl) >= 0) - if (rl.rlim_cur > 0) { - pa_log_info("RLIMIT_RTPRIO is set to %u, allowing real-time scheduling.", (unsigned) rl.rlim_cur); - allow_realtime = TRUE; - } -#endif -#ifdef RLIMIT_NICE - if (getrlimit(RLIMIT_NICE, &rl) >= 0) - if (rl.rlim_cur > 20 ) { - pa_log_info("RLIMIT_NICE is set to %u, allowing high-priority scheduling.", (unsigned) rl.rlim_cur); - allow_high_priority = TRUE; - } -#endif - - if ((conf->high_priority && !allow_high_priority) || - (conf->realtime_scheduling && !allow_realtime)) - pa_log_notice(_("Called SUID root and real-time and/or high-priority scheduling was requested in the configuration. However, we lack the necessary privileges:\n" - "We are not in group '%s', PolicyKit refuse to grant us the requested privileges and we have no increase RLIMIT_NICE/RLIMIT_RTPRIO resource limits.\n" - "For enabling real-time/high-priority scheduling please acquire the appropriate PolicyKit privileges, or become a member of '%s', or increase the RLIMIT_NICE/RLIMIT_RTPRIO resource limits for this user."), - PA_REALTIME_GROUP, PA_REALTIME_GROUP); - - - if (!allow_realtime) - conf->realtime_scheduling = FALSE; - - if (!allow_high_priority) - conf->high_priority = FALSE; - } - -#ifdef HAVE_SYS_RESOURCE_H - /* Reset resource limits. If we are run as root (for system mode) - * this might end up increasing the limits, which is intended - * behaviour. For all other cases, i.e. started as normal user, or - * SUID root at this point we should have no CAP_SYS_RESOURCE and - * increasing the limits thus should fail. Which is, too, intended - * behaviour */ - - set_all_rlimits(conf); -#endif - - if (conf->high_priority && !pa_can_high_priority()) { - pa_log_warn(_("High-priority scheduling enabled in configuration but not allowed by policy.")); - conf->high_priority = FALSE; - } - - if (conf->high_priority && (conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START)) - pa_raise_priority(conf->nice_level); - - pa_log_debug("Can realtime: %s, can high-priority: %s", pa_yes_no(pa_can_realtime()), pa_yes_no(pa_can_high_priority())); - - if (!real_root && pa_have_caps()) { - pa_bool_t drop; - - drop = (conf->cmd != PA_CMD_DAEMON && conf->cmd != PA_CMD_START) || !conf->realtime_scheduling; - -#ifdef RLIMIT_RTPRIO - if (!drop) { - struct rlimit rl; - /* 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. */ - - if (getrlimit(RLIMIT_RTPRIO, &rl) >= 0) { - - if (rl.rlim_cur >= 9) - drop = TRUE; - else { - rl.rlim_max = rl.rlim_cur = 9; - - if (setrlimit(RLIMIT_RTPRIO, &rl) >= 0) { - pa_log_info(_("Successfully increased RLIMIT_RTPRIO")); - drop = TRUE; - } else - pa_log_warn(_("RLIMIT_RTPRIO failed: %s"), pa_cstrerror(errno)); - } - } - } -#endif - - if (drop) { - pa_log_info(_("Giving up CAP_NICE")); - pa_drop_caps(); - suid_root = FALSE; - } - } - - if (conf->realtime_scheduling && !pa_can_realtime()) { - pa_log_warn(_("Real-time scheduling enabled in configuration but not allowed by policy.")); - conf->realtime_scheduling = FALSE; - } - - pa_log_debug("Can realtime: %s, can high-priority: %s", pa_yes_no(pa_can_realtime()), pa_yes_no(pa_can_high_priority())); - LTDL_SET_PRELOADED_SYMBOLS(); pa_ltdl_init(); ltdl_init = TRUE; @@ -671,9 +554,9 @@ int main(int argc, char *argv[]) { pa_assert(conf->cmd == PA_CMD_DAEMON || conf->cmd == PA_CMD_START); } - if (real_root && !conf->system_instance) + if (getuid() == 0 && !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) { + else if (getuid() != 0 && conf->system_instance) { pa_log(_("Root privileges required.")); goto finish; } @@ -819,6 +702,13 @@ int main(int argc, char *argv[]) { pa_assert_se(chdir("/") == 0); umask(0022); +#ifdef HAVE_SYS_RESOURCE_H + set_all_rlimits(conf); +#endif + pa_rtclock_hrtimer_enable(); + + pa_raise_priority(conf->nice_level); + if (conf->system_instance) if (change_user() < 0) goto finish; @@ -851,6 +741,14 @@ int main(int argc, char *argv[]) { 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; @@ -858,6 +756,11 @@ int main(int argc, char *argv[]) { 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); @@ -870,6 +773,11 @@ int main(int argc, char *argv[]) { 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 note that you most likely shouldn't be doing that.\n" + "If you do it nonetheless then it's your own fault if things don't work as expected.\n" + "Please read http://pulseaudio.org/wiki/WhatIsWrongWithSystemMode for an explanation why system mode is usually a bad idea.")); + if (conf->use_pid_file) { int z; @@ -890,21 +798,25 @@ int main(int argc, char *argv[]) { valid_pid_file = TRUE; } -#ifdef SIGPIPE - signal(SIGPIPE, SIG_IGN); -#endif + pa_disable_sigpipe(); 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!")); - pa_rtclock_hrtimer_enable(); - -#ifdef SIGRTMIN - /* Valgrind uses SIGRTMAX. To easy debugging we don't use it here */ - pa_rtsig_configure(SIGRTMIN, SIGRTMAX-1); + if (conf->lock_memory) { +#ifdef HAVE_SYS_MMAN_H + if (mlockall(MCL_FUTURE) < 0) + pa_log_warn("mlockall() failed: %s", pa_cstrerror(errno)); + else + pa_log_info("Sucessfully 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()); @@ -942,7 +854,7 @@ int main(int argc, char *argv[]) { #endif #ifdef OS_IS_WIN32 - win32_timer = pa_mainloop_get_api(mainloop)->time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL); + win32_timer = pa_mainloop_get_api(mainloop)->rtclock_time_new(pa_mainloop_get_api(mainloop), pa_gettimeofday(&win32_tv), message_cb, NULL); #endif oil_init(); @@ -989,6 +901,10 @@ int main(int argc, char *argv[]) { } #endif +#ifdef HAVE_DBUS + dbus = register_dbus(c); +#endif + pa_log_info(_("Daemon startup complete.")); retval = 0; @@ -998,6 +914,10 @@ int main(int argc, char *argv[]) { pa_log_info(_("Daemon shutdown initiated.")); finish: +#ifdef HAVE_DBUS + if (dbus) + pa_dbus_connection_unref(dbus); +#endif if (autospawn_fd >= 0) { if (autospawn_locked) |