10 #include <sys/ioctl.h>
12 #include <sys/socket.h>
18 #include "dinit-log.h"
19 #include "dinit-socket.h"
22 * service.cc - Service management.
23 * See service.h for details.
27 void open_control_socket(bool report_ro_failure = true) noexcept;
28 void setup_external_log() noexcept;
29 extern EventLoop_t eventLoop;
31 // Find the requested service by name
32 static ServiceRecord * find_service(const std::list<ServiceRecord *> & records,
33 const char *name) noexcept
36 list<ServiceRecord *>::const_iterator i = records.begin();
37 for ( ; i != records.end(); i++ ) {
38 if (strcmp((*i)->getServiceName().c_str(), name) == 0) {
42 return (ServiceRecord *)0;
45 ServiceRecord * ServiceSet::find_service(const std::string &name) noexcept
47 return ::find_service(records, name.c_str());
50 void ServiceSet::startService(const char *name)
53 ServiceRecord *record = loadServiceRecord(name);
59 void ServiceSet::stopService(const std::string & name) noexcept
61 ServiceRecord *record = find_service(name);
62 if (record != nullptr) {
68 // Called when a service has actually stopped; dependents have stopped already, unless this stop
69 // is due to an unexpected process termination.
70 void ServiceRecord::stopped() noexcept
72 if (service_type != ServiceType::SCRIPTED && service_type != ServiceType::BGPROCESS
73 && onstart_flags.runs_on_console) {
74 tcsetpgrp(0, getpgrp());
75 discard_console_log_buffer();
81 // If we are a soft dependency of another target, break the acquisition from that target now:
82 bool will_restart = (desired_state == ServiceState::STARTED)
83 && service_set->get_auto_restart();
86 for (auto dependency : soft_dpts) {
87 if (dependency->holding_acq) {
88 dependency->holding_acq = false;
94 for (auto dependency : depends_on) {
95 // we signal dependencies in case they are waiting for us to stop - but only if we won't
96 // restart or if they are stopping uninterruptibly.
97 if (! will_restart || ! dependency->can_interrupt_stop()) {
98 dependency->dependentStopped();
102 service_state = ServiceState::STOPPED;
105 // Desired state is "started".
107 service_set->addToStartQueue(this);
110 if (socket_fd != -1) {
115 if (start_explicit) {
116 start_explicit = false;
119 else if (required_by == 0) {
120 service_set->service_inactive(this);
124 logServiceStopped(service_name);
125 notifyListeners(ServiceEvent::STOPPED);
128 dasynq::rearm ServiceChildWatcher::status_change(EventLoop_t &loop, pid_t child, int status) noexcept
130 base_process_service *sr = service;
133 sr->exit_status = status;
135 // Ok, for a process service, any process death which we didn't rig
136 // ourselves is a bit... unexpected. Probably, the child died because
137 // we asked it to (sr->service_state == STOPPING). But even if
138 // we didn't, there's not much we can do.
140 if (sr->waiting_for_execstat) {
141 // We still don't have an exec() status from the forked child, wait for that
142 // before doing any further processing.
143 return rearm::REMOVE;
146 // Must deregister now since handle_exit_status might result in re-launch:
147 deregister(loop, child);
149 sr->handle_exit_status(status);
150 return rearm::REMOVED;
153 bool ServiceRecord::do_auto_restart() noexcept
156 return service_set->get_auto_restart();
161 void process_service::handle_exit_status(int exit_status) noexcept
163 bool did_exit = WIFEXITED(exit_status);
164 bool was_signalled = WIFSIGNALED(exit_status);
166 if (exit_status != 0 && service_state != ServiceState::STOPPING) {
168 log(LogLevel::ERROR, "Service ", service_name, " process terminated with exit code ", WEXITSTATUS(exit_status));
170 else if (was_signalled) {
171 log(LogLevel::ERROR, "Service ", service_name, " terminated due to signal ", WTERMSIG(exit_status));
175 if (service_state == ServiceState::STARTING) {
176 if (did_exit && WEXITSTATUS(exit_status) == 0) {
183 else if (service_state == ServiceState::STOPPING) {
184 // We won't log a non-zero exit status or termination due to signal here -
185 // we assume that the process died because we signalled it.
188 else if (smooth_recovery && service_state == ServiceState::STARTED && desired_state == ServiceState::STARTED) {
189 // TODO if we are pinned-started then we should probably check
190 // that dependencies have started before trying to re-start the
192 restart_ps_process();
196 if (! do_auto_restart()) desired_state = ServiceState::STOPPED;
199 service_set->processQueues(false);
202 void bgproc_service::handle_exit_status(int exit_status) noexcept
204 bool did_exit = WIFEXITED(exit_status);
205 bool was_signalled = WIFSIGNALED(exit_status);
207 if (exit_status != 0 && service_state != ServiceState::STOPPING) {
209 log(LogLevel::ERROR, "Service ", service_name, " process terminated with exit code ", WEXITSTATUS(exit_status));
211 else if (was_signalled) {
212 log(LogLevel::ERROR, "Service ", service_name, " terminated due to signal ", WTERMSIG(exit_status));
216 if (doing_recovery) {
218 doing_recovery = false;
219 bool need_stop = false;
220 if ((did_exit && WEXITSTATUS(exit_status) != 0) || was_signalled) {
224 // We need to re-read the PID, since it has now changed.
225 if (pid_file.length() != 0) {
226 if (! read_pid_file()) {
233 // Failed startup: no auto-restart.
234 desired_state = ServiceState::STOPPED;
236 service_set->processQueues(false);
242 if (service_state == ServiceState::STARTING) {
243 // POSIX requires that if the process exited clearly with a status code of 0,
244 // the exit status value will be 0:
245 if (exit_status == 0) {
246 if (pid_file.length() != 0 && ! read_pid_file()) {
257 else if (service_state == ServiceState::STOPPING) {
258 // We won't log a non-zero exit status or termination due to signal here -
259 // we assume that the process died because we signalled it.
262 else if (smooth_recovery && service_state == ServiceState::STARTED && desired_state == ServiceState::STARTED) {
263 // TODO if we are pinned-started then we should probably check
264 // that dependencies have started before trying to re-start the
266 doing_recovery = true;
267 restart_ps_process();
271 if (! do_auto_restart()) desired_state = ServiceState::STOPPED;
274 service_set->processQueues(false);
277 void scripted_service::handle_exit_status(int exit_status) noexcept
279 bool did_exit = WIFEXITED(exit_status);
280 bool was_signalled = WIFSIGNALED(exit_status);
282 if (service_state == ServiceState::STOPPING) {
283 if (did_exit && WEXITSTATUS(exit_status) == 0) {
287 // ??? failed to stop! Let's log it as info:
289 log(LogLevel::INFO, "Service ", service_name, " stop command failed with exit code ", WEXITSTATUS(exit_status));
291 else if (was_signalled) {
292 log(LogLevel::INFO, "Serivice ", service_name, " stop command terminated due to signal ", WTERMSIG(exit_status));
294 // Just assume that we stopped, so that any dependencies
298 service_set->processQueues(false);
301 if (exit_status == 0) {
307 log(LogLevel::ERROR, "Service ", service_name, " command failed with exit code ", WEXITSTATUS(exit_status));
309 else if (was_signalled) {
310 log(LogLevel::ERROR, "Service ", service_name, " command terminated due to signal ", WTERMSIG(exit_status));
314 service_set->processQueues(true);
318 rearm ServiceIoWatcher::fd_event(EventLoop_t &loop, int fd, int flags) noexcept
320 base_process_service *sr = service;
321 sr->waiting_for_execstat = false;
324 int r = read(get_watched_fd(), &exec_status, sizeof(int));
326 close(get_watched_fd());
329 // We read an errno code; exec() failed, and the service startup failed.
331 log(LogLevel::ERROR, sr->service_name, ": execution failed: ", strerror(exec_status));
332 if (sr->service_state == ServiceState::STARTING) {
333 sr->failed_to_start();
335 else if (sr->service_state == ServiceState::STOPPING) {
336 // Must be a scripted service. We've logged the failure, but it's probably better
337 // not to leave the service in STARTED state:
343 if (sr->service_type == ServiceType::PROCESS) {
344 // This could be a smooth recovery (state already STARTED). Even more, the process
345 // might be stopped (and killed via a signal) during smooth recovery. We don't to
346 // process startup again in either case, so we check for state STARTING:
347 if (sr->service_state == ServiceState::STARTING) {
353 // Somehow the process managed to complete before we even saw the status.
354 sr->handle_exit_status(sr->exit_status);
358 sr->service_set->processQueues(true);
360 return rearm::REMOVED;
363 void ServiceRecord::require() noexcept
365 if (required_by++ == 0) {
367 if (! prop_require) {
369 prop_release = false;
370 service_set->addToPropQueue(this);
373 if (service_state == ServiceState::STOPPED) {
374 // (In any other state, the service is already considered active.)
375 service_set->service_active(this);
380 void ServiceRecord::release() noexcept
382 if (--required_by == 0) {
383 desired_state = ServiceState::STOPPED;
384 // Can stop, and can release dependencies now:
386 prop_require = false;
387 service_set->addToPropQueue(this);
388 if (service_state != ServiceState::STOPPED) {
389 service_set->addToStopQueue(this);
392 service_set->service_inactive(this);
397 void ServiceRecord::release_dependencies() noexcept
399 for (sr_iter i = depends_on.begin(); i != depends_on.end(); ++i) {
403 for (auto i = soft_deps.begin(); i != soft_deps.end(); ++i) {
404 ServiceRecord * to = i->getTo();
405 if (i->holding_acq) {
407 i->holding_acq = false;
412 void ServiceRecord::start(bool activate) noexcept
414 if (activate && ! start_explicit) {
416 start_explicit = true;
419 if (desired_state == ServiceState::STARTED && service_state != ServiceState::STOPPED) return;
421 desired_state = ServiceState::STARTED;
422 service_set->addToStartQueue(this);
425 void ServiceRecord::do_propagation() noexcept
428 // Need to require all our dependencies
429 for (sr_iter i = depends_on.begin(); i != depends_on.end(); ++i) {
433 for (auto i = soft_deps.begin(); i != soft_deps.end(); ++i) {
434 ServiceRecord * to = i->getTo();
436 i->holding_acq = true;
439 prop_require = false;
443 release_dependencies();
444 prop_release = false;
448 prop_failure = false;
449 failed_to_start(true);
452 if (waiting_for_deps) {
453 if (service_state == ServiceState::STARTING) {
454 if (startCheckDependencies(false)) {
458 else if (service_state == ServiceState::STOPPING) {
459 if (stopCheckDependents()) {
466 void ServiceRecord::execute_transition() noexcept
468 bool is_started = (service_state == ServiceState::STARTED)
469 || (service_state == ServiceState::STARTING && can_interrupt_start());
470 bool is_stopped = (service_state == ServiceState::STOPPED)
471 || (service_state == ServiceState::STOPPING && can_interrupt_stop());
473 if (is_started && (desired_state == ServiceState::STOPPED || force_stop)) {
474 if (! pinned_started) {
478 else if (is_stopped && desired_state == ServiceState::STARTED) {
479 if (! pinned_stopped) {
485 void ServiceRecord::do_start() noexcept
487 if (pinned_stopped) return;
489 if (service_state != ServiceState::STOPPED) {
490 // We're already starting/started, or we are stopping and need to wait for
491 // that the complete.
492 if (service_state != ServiceState::STOPPING || ! can_interrupt_stop()) {
495 // We're STOPPING, and that can be interrupted. Our dependencies might be STOPPING,
496 // but if so they are waiting (for us), so they too can be instantly returned to
498 notifyListeners(ServiceEvent::STOPCANCELLED);
501 service_state = ServiceState::STARTING;
503 waiting_for_deps = true;
505 // Ask dependencies to start, mark them as being waited on.
506 if (! startCheckDependencies(true)) {
510 // Actually start this service.
514 void ServiceRecord::dependencyStarted() noexcept
516 if (service_state == ServiceState::STARTING && waiting_for_deps) {
517 service_set->addToPropQueue(this);
521 bool ServiceRecord::startCheckDependencies(bool start_deps) noexcept
523 bool all_deps_started = true;
525 for (sr_iter i = depends_on.begin(); i != depends_on.end(); ++i) {
526 if ((*i)->service_state != ServiceState::STARTED) {
528 all_deps_started = false;
537 for (auto i = soft_deps.begin(); i != soft_deps.end(); ++i) {
538 ServiceRecord * to = i->getTo();
540 if (to->service_state != ServiceState::STARTED) {
542 i->waiting_on = true;
543 all_deps_started = false;
546 i->waiting_on = false;
549 else if (i->waiting_on) {
550 if (to->service_state != ServiceState::STARTING) {
551 // Service has either started or is no longer starting
552 i->waiting_on = false;
555 // We are still waiting on this service
561 return all_deps_started;
564 bool ServiceRecord::open_socket() noexcept
566 if (socket_path.empty() || socket_fd != -1) {
567 // No socket, or already open
571 const char * saddrname = socket_path.c_str();
572 uint sockaddr_size = offsetof(struct sockaddr_un, sun_path) + socket_path.length() + 1;
574 struct sockaddr_un * name = static_cast<sockaddr_un *>(malloc(sockaddr_size));
575 if (name == nullptr) {
576 log(LogLevel::ERROR, service_name, ": Opening activation socket: out of memory");
580 // Un-link any stale socket. TODO: safety check? should at least confirm the path is a socket.
583 name->sun_family = AF_UNIX;
584 strcpy(name->sun_path, saddrname);
586 int sockfd = dinit_socket(AF_UNIX, SOCK_STREAM, 0, SOCK_NONBLOCK | SOCK_CLOEXEC);
588 log(LogLevel::ERROR, service_name, ": Error creating activation socket: ", strerror(errno));
593 if (bind(sockfd, (struct sockaddr *) name, sockaddr_size) == -1) {
594 log(LogLevel::ERROR, service_name, ": Error binding activation socket: ", strerror(errno));
602 // POSIX (1003.1, 2013) says that fchown and fchmod don't necesarily work on sockets. We have to
603 // use chown and chmod instead.
604 if (chown(saddrname, socket_uid, socket_gid)) {
605 log(LogLevel::ERROR, service_name, ": Error setting activation socket owner/group: ", strerror(errno));
610 if (chmod(saddrname, socket_perms) == -1) {
611 log(LogLevel::ERROR, service_name, ": Error setting activation socket permissions: ", strerror(errno));
616 if (listen(sockfd, 128) == -1) { // 128 "seems reasonable".
617 log(LogLevel::ERROR, ": Error listening on activation socket: ", strerror(errno));
626 void ServiceRecord::allDepsStarted(bool has_console) noexcept
628 if (onstart_flags.runs_on_console && ! has_console) {
629 waiting_for_deps = true;
634 waiting_for_deps = false;
636 if (! open_socket()) {
640 bool start_success = start_ps_process();
641 if (! start_success) {
646 void ServiceRecord::acquiredConsole() noexcept
648 if (service_state != ServiceState::STARTING) {
649 // We got the console but no longer want it.
652 else if (startCheckDependencies(false)) {
653 allDepsStarted(true);
656 // We got the console but can't use it yet.
661 bool bgproc_service::read_pid_file() noexcept
663 const char *pid_file_c = pid_file.c_str();
664 int fd = open(pid_file_c, O_CLOEXEC);
666 char pidbuf[21]; // just enought to hold any 64-bit integer
667 int r = read(fd, pidbuf, 20);
669 pidbuf[r] = 0; // store nul terminator
670 pid = std::atoi(pidbuf);
671 if (kill(pid, 0) == 0) {
672 child_listener.add_watch(eventLoop, pid);
675 log(LogLevel::ERROR, service_name, ": pid read from pidfile (", pid, ") is not valid");
685 log(LogLevel::ERROR, service_name, ": read pid file: ", strerror(errno));
690 void ServiceRecord::started() noexcept
692 if (onstart_flags.runs_on_console && (service_type == ServiceType::SCRIPTED || service_type == ServiceType::BGPROCESS)) {
693 tcsetpgrp(0, getpgrp());
697 logServiceStarted(service_name);
698 service_state = ServiceState::STARTED;
699 notifyListeners(ServiceEvent::STARTED);
701 if (onstart_flags.rw_ready) {
702 open_control_socket();
704 if (onstart_flags.log_ready) {
705 setup_external_log();
708 if (force_stop || desired_state == ServiceState::STOPPED) {
710 service_set->addToStopQueue(this);
714 // Notify any dependents whose desired state is STARTED:
715 for (auto i = dependents.begin(); i != dependents.end(); i++) {
716 (*i)->dependencyStarted();
718 for (auto i = soft_dpts.begin(); i != soft_dpts.end(); i++) {
719 (*i)->getFrom()->dependencyStarted();
723 void ServiceRecord::failed_to_start(bool depfailed) noexcept
725 if (!depfailed && onstart_flags.runs_on_console) {
726 tcsetpgrp(0, getpgrp());
730 logServiceFailed(service_name);
731 service_state = ServiceState::STOPPED;
732 if (start_explicit) {
733 start_explicit = false;
736 notifyListeners(ServiceEvent::FAILEDSTART);
738 // Cancel start of dependents:
739 for (sr_iter i = dependents.begin(); i != dependents.end(); i++) {
740 if ((*i)->service_state == ServiceState::STARTING) {
741 (*i)->prop_failure = true;
742 service_set->addToPropQueue(*i);
745 for (auto i = soft_dpts.begin(); i != soft_dpts.end(); i++) {
746 // We can send 'start', because this is only a soft dependency.
747 // Our startup failure means that they don't have to wait for us.
748 if ((*i)->waiting_on) {
749 (*i)->holding_acq = false;
750 (*i)->waiting_on = false;
751 (*i)->getFrom()->dependencyStarted();
757 bool ServiceRecord::start_ps_process() noexcept
759 // default implementation: there is no process, so we are started.
764 bool base_process_service::start_ps_process() noexcept
767 restart_ps_process();
771 return start_ps_process(exec_arg_parts, onstart_flags.runs_on_console);
775 bool base_process_service::start_ps_process(const std::vector<const char *> &cmd, bool on_console) noexcept
777 // In general, you can't tell whether fork/exec is successful. We use a pipe to communicate
778 // success/failure from the child to the parent. The pipe is set CLOEXEC so a successful
779 // exec closes the pipe, and the parent sees EOF. If the exec is unsuccessful, the errno
780 // is written to the pipe, and the parent can read it.
782 eventLoop.get_time(last_start_time, clock_type::MONOTONIC);
785 if (pipe2(pipefd, O_CLOEXEC)) {
786 log(LogLevel::ERROR, service_name, ": can't create status check pipe: ", strerror(errno));
790 const char * logfile = this->logfile.c_str();
792 logfile = "/dev/null";
795 bool child_status_registered = false;
796 ControlConn *control_conn = nullptr;
798 int control_socket[2] = {-1, -1};
799 if (onstart_flags.pass_cs_fd) {
800 if (dinit_socketpair(AF_UNIX, SOCK_STREAM, /* protocol */ 0, control_socket, SOCK_NONBLOCK)) {
801 log(LogLevel::ERROR, service_name, ": can't create control socket: ", strerror(errno));
805 // Make the server side socket close-on-exec:
806 int fdflags = fcntl(control_socket[0], F_GETFD);
807 fcntl(control_socket[0], F_SETFD, fdflags | FD_CLOEXEC);
810 control_conn = new ControlConn(&eventLoop, service_set, control_socket[0]);
812 catch (std::exception &exc) {
813 log(LogLevel::ERROR, service_name, ": can't launch process; out of memory");
818 // Set up complete, now fork and exec:
823 child_status_listener.add_watch(eventLoop, pipefd[0], IN_EVENTS);
824 child_status_registered = true;
826 forkpid = child_listener.fork(eventLoop);
828 catch (std::exception &e) {
829 log(LogLevel::ERROR, service_name, ": Could not fork: ", e.what());
834 run_child_proc(cmd.data(), logfile, on_console, pipefd[1], control_socket[1]);
838 close(pipefd[1]); // close the 'other end' fd
839 if (control_socket[1] != -1) {
840 close(control_socket[1]);
844 waiting_for_execstat = true;
851 if (child_status_registered) {
852 child_status_listener.deregister(eventLoop);
855 if (onstart_flags.pass_cs_fd) {
859 close(control_socket[0]);
860 close(control_socket[1]);
870 void ServiceRecord::run_child_proc(const char * const *args, const char *logfile, bool on_console,
871 int wpipefd, int csfd) noexcept
873 // Child process. Must not allocate memory (or otherwise risk throwing any exception)
874 // from here until exit().
876 // If the console already has a session leader, presumably it is us. On the other hand
877 // if it has no session leader, and we don't create one, then control inputs such as
878 // ^C will have no effect.
879 bool do_set_ctty = (tcgetsid(0) == -1);
881 // Copy signal mask, but unmask signals that we masked on startup. For the moment, we'll
882 // also block all signals, since apparently dup() can be interrupted (!!! really, POSIX??).
883 sigset_t sigwait_set;
885 sigfillset(&sigall_set);
886 sigprocmask(SIG_SETMASK, &sigall_set, &sigwait_set);
887 sigdelset(&sigwait_set, SIGCHLD);
888 sigdelset(&sigwait_set, SIGINT);
889 sigdelset(&sigwait_set, SIGTERM);
891 constexpr int bufsz = ((CHAR_BIT * sizeof(pid_t)) / 3 + 2) + 11;
892 // "LISTEN_PID=" - 11 characters; the expression above gives a conservative estimate
893 // on the maxiumum number of bytes required for LISTEN=nnn, including nul terminator,
894 // where nnn is a pid_t in decimal (i.e. one decimal digit is worth just over 3 bits).
897 // "DINIT_CS_FD=" - 12 bytes. (we -1 from sizeof(int) in account of sign bit).
898 constexpr int csenvbufsz = ((CHAR_BIT * sizeof(int) - 1) / 3 + 2) + 12;
899 char csenvbuf[csenvbufsz];
901 int minfd = (socket_fd == -1) ? 3 : 4;
903 // Move wpipefd/csfd to another fd if necessary
904 if (wpipefd < minfd) {
905 wpipefd = fcntl(wpipefd, F_DUPFD_CLOEXEC, minfd);
906 if (wpipefd == -1) goto failure_out;
909 if (csfd != -1 && csfd < minfd) {
910 csfd = fcntl(csfd, F_DUPFD, minfd);
911 if (csfd == -1) goto failure_out;
914 if (socket_fd != -1) {
916 if (dup2(socket_fd, 3) == -1) goto failure_out;
917 if (socket_fd != 3) {
921 if (putenv(const_cast<char *>("LISTEN_FDS=1"))) goto failure_out;
922 snprintf(nbuf, bufsz, "LISTEN_PID=%jd", static_cast<intmax_t>(getpid()));
923 if (putenv(nbuf)) goto failure_out;
927 snprintf(csenvbuf, csenvbufsz, "DINIT_CS_FD=%d", csfd);
928 if (putenv(csenvbuf)) goto failure_out;
932 // Re-set stdin, stdout, stderr
933 close(0); close(1); close(2);
935 if (open("/dev/null", O_RDONLY) == 0) {
936 // stdin = 0. That's what we should have; proceed with opening
937 // stdout and stderr.
938 if (open(logfile, O_WRONLY | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR) != 1) {
941 if (dup2(1, 2) != 2) {
945 else goto failure_out;
947 // We have the option of creating a new process group and/or session. If
948 // we just create a new process group, the child process cannot make itself
949 // a session leader if it wants to do that (eg getty/login will generally
950 // want this). If we do neither, and we are running with a controlling
951 // terminal, a ^C or similar will also affect the child process.
955 // "run on console" - run as a foreground job on the terminal/console device
957 // if do_set_ctty is false, we are the session leader; we are probably running
958 // as a user process. Don't create a new session leader in that case, and run
959 // as part of the parent session. Otherwise, the new session cannot claim the
960 // terminal as a controlling terminal (it is already claimed), meaning that it
961 // will not see control signals from ^C etc.
964 // Disable suspend (^Z) (and on some systems, delayed suspend / ^Y)
965 signal(SIGTSTP, SIG_IGN);
967 // Become session leader
969 ioctl(0, TIOCSCTTY, 0);
972 tcsetpgrp(0, getpgrp());
975 sigprocmask(SIG_SETMASK, &sigwait_set, nullptr);
977 execvp(args[0], const_cast<char **>(args));
979 // If we got here, the exec failed:
981 int exec_status = errno;
982 write(wpipefd, &exec_status, sizeof(int));
986 // Mark this and all dependent services as force-stopped.
987 void ServiceRecord::forceStop() noexcept
989 if (service_state != ServiceState::STOPPED) {
991 service_set->addToStopQueue(this);
995 void ServiceRecord::dependentStopped() noexcept
997 if (service_state == ServiceState::STOPPING && waiting_for_deps) {
998 service_set->addToPropQueue(this);
1002 void ServiceRecord::stop(bool bring_down) noexcept
1004 if (start_explicit) {
1005 start_explicit = false;
1009 if (bring_down && desired_state != ServiceState::STOPPED) {
1010 desired_state = ServiceState::STOPPED;
1011 service_set->addToStopQueue(this);
1015 void ServiceRecord::do_stop() noexcept
1017 if (pinned_started) return;
1019 if (service_state != ServiceState::STARTED) {
1020 if (service_state == ServiceState::STARTING) {
1021 if (! can_interrupt_start()) {
1022 // Well this is awkward: we're going to have to continue
1023 // starting, but we don't want any dependents to think that
1024 // they are still waiting to start.
1025 // Make sure they remain stopped:
1030 // We must have had desired_state == STARTED.
1031 notifyListeners(ServiceEvent::STARTCANCELLED);
1033 // Reaching this point, we have can_interrupt_start() == true. So,
1034 // we can stop. Dependents might be starting, but they must be
1035 // waiting on us, so they should also be immediately stoppable.
1036 // Fall through to below,.
1039 // If we're starting we need to wait for that to complete.
1040 // If we're already stopping/stopped there's nothing to do.
1045 service_state = ServiceState::STOPPING;
1046 waiting_for_deps = true;
1048 // If we get here, we are in STARTED state; stop all dependents.
1049 if (stopDependents()) {
1054 bool ServiceRecord::stopCheckDependents() noexcept
1056 bool all_deps_stopped = true;
1057 for (sr_iter i = dependents.begin(); i != dependents.end(); ++i) {
1058 if (! (*i)->is_stopped()) {
1059 all_deps_stopped = false;
1064 return all_deps_stopped;
1067 bool ServiceRecord::stopDependents() noexcept
1069 bool all_deps_stopped = true;
1070 for (sr_iter i = dependents.begin(); i != dependents.end(); ++i) {
1071 if (! (*i)->is_stopped()) {
1072 // Note we check *first* since if the dependent service is not stopped,
1073 // 1. We will issue a stop to it shortly and
1074 // 2. It will notify us when stopped, at which point the stopCheckDependents()
1075 // check is run anyway.
1076 all_deps_stopped = false;
1082 return all_deps_stopped;
1085 // All dependents have stopped; we can stop now, too. Only called when STOPPING.
1086 void ServiceRecord::all_deps_stopped() noexcept
1088 waiting_for_deps = false;
1092 void base_process_service::all_deps_stopped() noexcept
1094 waiting_for_deps = false;
1096 // The process is still kicking on - must actually kill it.
1097 if (! onstart_flags.no_sigterm) {
1100 if (term_signal != -1) {
1101 kill(pid, term_signal);
1104 // In most cases, the rest is done in process_child_callback.
1105 // If we are a BGPROCESS and the process is not our immediate child, however, that
1106 // won't work - check for this now:
1107 if (service_type == ServiceType::BGPROCESS) {
1109 pid_t r = waitpid(pid, &status, WNOHANG);
1110 if (r == -1 && errno == ECHILD) {
1111 // We can't track this child (or it's terminated already)
1114 else if (r == pid) {
1115 // Process may have died due to signal since we explicitly requested it to
1116 // stop by signalling it; no need to log any termination status.
1122 // The process is already dead.
1127 void scripted_service::all_deps_stopped() noexcept
1129 waiting_for_deps = false;
1130 if (stop_command.length() == 0) {
1133 else if (! start_ps_process(stop_arg_parts, false)) {
1134 // Couldn't execute stop script, but there's not much we can do:
1139 void ServiceRecord::unpin() noexcept
1141 if (pinned_started) {
1142 pinned_started = false;
1143 if (desired_state == ServiceState::STOPPED) {
1145 service_set->processQueues(false);
1148 if (pinned_stopped) {
1149 pinned_stopped = false;
1150 if (desired_state == ServiceState::STARTED) {
1152 service_set->processQueues(true);
1157 void ServiceRecord::queueForConsole() noexcept
1159 service_set->append_console_queue(this);
1162 void ServiceRecord::releaseConsole() noexcept
1164 service_set->pullConsoleQueue();
1167 void ServiceSet::service_active(ServiceRecord *sr) noexcept
1172 void ServiceSet::service_inactive(ServiceRecord *sr) noexcept
1177 base_process_service::base_process_service(ServiceSet *sset, string name, ServiceType service_type, string &&command,
1178 std::list<std::pair<unsigned,unsigned>> &command_offsets,
1179 sr_list * pdepends_on, sr_list * pdepends_soft)
1180 : ServiceRecord(sset, name, service_type, std::move(command), command_offsets,
1181 pdepends_on, pdepends_soft), child_listener(this), child_status_listener(this)
1183 restart_timer.service = this;
1184 restart_timer.add_timer(eventLoop);
1187 void base_process_service::restart_ps_process() noexcept
1189 timespec current_time;
1190 eventLoop.get_time(current_time, clock_type::MONOTONIC);
1191 auto tdiff_s = current_time.tv_sec - last_start_time.tv_sec;
1192 decltype(current_time.tv_nsec) tdiff_ns;
1193 if (current_time.tv_nsec >= last_start_time.tv_nsec) {
1194 tdiff_ns = current_time.tv_nsec - last_start_time.tv_nsec;
1198 tdiff_ns = 1000000000 - (last_start_time.tv_nsec - current_time.tv_nsec);
1201 if (tdiff_s > 0 || tdiff_ns > 200000000) {
1204 if (! start_ps_process(exec_arg_parts, onstart_flags.runs_on_console)) {
1205 // TODO handle appropriately; mark service stopped.
1211 timeout.tv_nsec = 200000000 - tdiff_ns;
1212 restart_timer.arm_timer_rel(eventLoop, timeout);
1216 dasynq::rearm process_restart_timer::timer_expiry(EventLoop_t &, int expiry_count)
1218 return service->restart_timer_expired();
1221 dasynq::rearm base_process_service::restart_timer_expired() noexcept
1223 // begin starting process:
1224 if (! start_ps_process(exec_arg_parts, onstart_flags.runs_on_console)) {
1225 // TODO handle appropriately; mark service stopped.
1227 return dasynq::rearm::DISARM;