diff options
Diffstat (limited to 'src/daemon/main.c')
-rw-r--r-- | src/daemon/main.c | 244 |
1 files changed, 39 insertions, 205 deletions
diff --git a/src/daemon/main.c b/src/daemon/main.c index 62214a56..c1730b70 100644 --- a/src/daemon/main.c +++ b/src/daemon/main.c @@ -40,6 +40,10 @@ #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 +73,7 @@ #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> @@ -80,8 +85,6 @@ #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> @@ -98,7 +101,6 @@ #include "dumpmodules.h" #include "caps.h" #include "ltdl-bind-now.h" -#include "polkit.h" #include "server-lookup.h" #ifdef HAVE_LIBWRAP @@ -130,7 +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 @@ -376,9 +378,7 @@ 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; @@ -424,30 +424,6 @@ int main(int argc, char *argv[]) { } #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(); - - /* Drop privileges, but keep CAP_SYS_NICE */ - pa_drop_root(); - - /* After dropping root, the effective set is reset, hence, - * let's raise it again */ - pa_limit_caps(); - - /* When capabilities are not supported we will not be able to - * acquire 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. */ - } - if ((e = getenv("PULSE_PASSED_FD"))) { passed_fd = atoi(e); @@ -455,15 +431,14 @@ 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(); @@ -506,7 +481,7 @@ int main(int argc, char *argv[]) { pa_assert_not_reached(); } - start_server = conf->local_server_type == PA_SERVER_TYPE_USER || (real_root && conf->local_server_type == PA_SERVER_TYPE_SYSTEM); + 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.")); @@ -514,165 +489,6 @@ int main(int argc, char *argv[]) { } #endif - pa_log_debug("Started as real root: %s, suid root: %s", pa_yes_no(real_root), pa_yes_no(suid_root)); - -#ifdef HAVE_DBUS - /* XXX: Uhh, goto programming... as if this wasn't hard enough to follow - * already. But if we won't start the full server, we want to just skip all - * the capability stuff. */ - if (!start_server) { - if (!real_root && pa_have_caps()) - pa_drop_caps(); - goto after_caps_setup; - } -#endif - - 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_info(_("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_info(_("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_info(_("Real-time scheduling enabled in configuration but not allowed by policy.")); - conf->realtime_scheduling = FALSE; - } - -#ifdef HAVE_DBUS -after_caps_setup: -#endif - - 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; @@ -757,10 +573,10 @@ after_caps_setup: 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).")); #ifndef HAVE_DBUS /* A similar, only a notice worthy check was done earlier, if D-Bus is enabled. */ - else if (!real_root && conf->system_instance) { + else if (getuid() != 0 && conf->system_instance) { pa_log(_("Root privileges required.")); goto finish; } @@ -907,6 +723,13 @@ after_caps_setup: 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; @@ -955,8 +778,8 @@ after_caps_setup: pa_xfree(s); if ((s = pa_session_id())) { - pa_log_info(_("Session ID is %s."), s); - pa_xfree(s); + pa_log_info(_("Session ID is %s."), s); + pa_xfree(s); } if (!(s = pa_get_runtime_dir())) @@ -971,6 +794,11 @@ after_caps_setup: 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; @@ -998,12 +826,16 @@ after_caps_setup: 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(); @@ -1028,7 +860,9 @@ after_caps_setup: c->running_as_daemon = !!conf->daemonize; c->disallow_exit = conf->disallow_exit; c->flat_volumes = conf->flat_volumes; +#ifdef HAVE_DBUS c->server_type = conf->local_server_type; +#endif pa_assert_se(pa_signal_init(pa_mainloop_get_api(mainloop)) == 0); pa_signal_new(SIGINT, signal_callback, c); @@ -1044,7 +878,7 @@ after_caps_setup: #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(); |