1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/epoll.h>
27 #include <sys/signalfd.h>
31 #include <sys/reboot.h>
32 #include <sys/ioctl.h>
36 #include <sys/types.h>
39 #include <sys/timerfd.h>
45 #include "systemd/sd-daemon.h"
46 #include "systemd/sd-id128.h"
47 #include "systemd/sd-messages.h"
50 #include "transaction.h"
57 #include "ratelimit.h"
58 #include "locale-setup.h"
59 #include "mount-setup.h"
60 #include "unit-name.h"
61 #include "dbus-unit.h"
64 #include "path-lookup.h"
66 #include "bus-errors.h"
67 #include "exit-status.h"
70 #include "cgroup-util.h"
71 #include "path-util.h"
73 #include "boot-timestamps.h"
76 /* As soon as 5s passed since a unit was added to our GC queue, make sure to run a gc sweep */
77 #define GC_QUEUE_USEC_MAX (10*USEC_PER_SEC)
79 /* Initial delay and the interval for printing status messages about running jobs */
80 #define JOBS_IN_PROGRESS_WAIT_SEC 5
81 #define JOBS_IN_PROGRESS_PERIOD_SEC 1
82 #define JOBS_IN_PROGRESS_PERIOD_DIVISOR 3
84 /* Where clients shall send notification messages to */
85 #define NOTIFY_SOCKET "@/org/freedesktop/systemd1/notify"
87 #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
89 static int manager_setup_notify(Manager *m) {
92 struct sockaddr_un un;
94 .sa.sa_family = AF_UNIX,
96 struct epoll_event ev = {
98 .data.ptr = &m->notify_watch,
102 m->notify_watch.type = WATCH_NOTIFY;
103 m->notify_watch.fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
104 if (m->notify_watch.fd < 0) {
105 log_error("Failed to allocate notification socket: %m");
109 if (getpid() != 1 || detect_container(NULL) > 0)
110 snprintf(sa.un.sun_path, sizeof(sa.un.sun_path), NOTIFY_SOCKET "/%llu", random_ull());
112 strncpy(sa.un.sun_path, NOTIFY_SOCKET, sizeof(sa.un.sun_path));
114 sa.un.sun_path[0] = 0;
116 r = bind(m->notify_watch.fd, &sa.sa,
117 offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
119 log_error("bind() failed: %m");
123 r = setsockopt(m->notify_watch.fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
125 log_error("SO_PASSCRED failed: %m");
129 r = epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->notify_watch.fd, &ev);
131 log_error("Failed to add notification socket fd to epoll: %m");
135 sa.un.sun_path[0] = '@';
136 m->notify_socket = strdup(sa.un.sun_path);
137 if (!m->notify_socket)
140 log_debug("Using notification socket %s", m->notify_socket);
145 static int manager_jobs_in_progress_mod_timer(Manager *m) {
146 struct itimerspec its = {
147 .it_value.tv_sec = JOBS_IN_PROGRESS_WAIT_SEC,
148 .it_interval.tv_sec = JOBS_IN_PROGRESS_PERIOD_SEC,
151 if (m->jobs_in_progress_watch.type != WATCH_JOBS_IN_PROGRESS)
154 if (timerfd_settime(m->jobs_in_progress_watch.fd, 0, &its, NULL) < 0)
160 static int manager_watch_jobs_in_progress(Manager *m) {
161 struct epoll_event ev = {
163 .data.ptr = &m->jobs_in_progress_watch,
167 if (m->jobs_in_progress_watch.type != WATCH_INVALID)
170 m->jobs_in_progress_watch.type = WATCH_JOBS_IN_PROGRESS;
171 m->jobs_in_progress_watch.fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC);
172 if (m->jobs_in_progress_watch.fd < 0) {
173 log_error("Failed to create timerfd: %m");
178 r = manager_jobs_in_progress_mod_timer(m);
180 log_error("Failed to set up timer for jobs progress watch: %s", strerror(-r));
184 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->jobs_in_progress_watch.fd, &ev) < 0) {
185 log_error("Failed to add jobs progress timer fd to epoll: %m");
190 log_debug("Set up jobs progress timerfd.");
195 if (m->jobs_in_progress_watch.fd >= 0)
196 close_nointr_nofail(m->jobs_in_progress_watch.fd);
197 watch_init(&m->jobs_in_progress_watch);
201 static void manager_unwatch_jobs_in_progress(Manager *m) {
202 if (m->jobs_in_progress_watch.type != WATCH_JOBS_IN_PROGRESS)
205 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, m->jobs_in_progress_watch.fd, NULL) >= 0);
206 close_nointr_nofail(m->jobs_in_progress_watch.fd);
207 watch_init(&m->jobs_in_progress_watch);
208 m->jobs_in_progress_iteration = 0;
210 log_debug("Closed jobs progress timerfd.");
213 #define CYLON_BUFFER_EXTRA (2*strlen(ANSI_RED_ON) + strlen(ANSI_HIGHLIGHT_RED_ON) + 2*strlen(ANSI_HIGHLIGHT_OFF))
214 static void draw_cylon(char buffer[], size_t buflen, unsigned width, unsigned pos) {
217 assert(buflen >= CYLON_BUFFER_EXTRA + width + 1);
218 assert(pos <= width+1); /* 0 or width+1 mean that the center light is behind the corner */
222 p = mempset(p, ' ', pos-2);
223 p = stpcpy(p, ANSI_RED_ON);
227 if (pos > 0 && pos <= width) {
228 p = stpcpy(p, ANSI_HIGHLIGHT_RED_ON);
232 p = stpcpy(p, ANSI_HIGHLIGHT_OFF);
235 p = stpcpy(p, ANSI_RED_ON);
238 p = mempset(p, ' ', width-1-pos);
239 strcpy(p, ANSI_HIGHLIGHT_OFF);
243 static void manager_print_jobs_in_progress(Manager *m) {
246 char *job_of_n = NULL;
247 unsigned counter = 0, print_nr;
248 char cylon[6 + CYLON_BUFFER_EXTRA + 1];
251 print_nr = (m->jobs_in_progress_iteration / JOBS_IN_PROGRESS_PERIOD_DIVISOR) % m->n_running_jobs;
253 HASHMAP_FOREACH(j, m->jobs, i)
254 if (j->state == JOB_RUNNING && counter++ == print_nr)
257 /* m->n_running_jobs must be consistent with the contents of m->jobs,
258 * so the above loop must have succeeded in finding j. */
259 assert(counter == print_nr + 1);
262 cylon_pos = m->jobs_in_progress_iteration % 14;
264 cylon_pos = 14 - cylon_pos;
265 draw_cylon(cylon, sizeof(cylon), 6, cylon_pos);
267 if (m->n_running_jobs > 1)
268 if (asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs) < 0)
271 manager_status_printf(m, true, cylon, "%sA %s job is running for %s",
272 strempty(job_of_n), job_type_to_string(j->type), unit_description(j->unit));
275 m->jobs_in_progress_iteration++;
278 static int manager_watch_idle_pipe(Manager *m) {
279 struct epoll_event ev = {
281 .data.ptr = &m->idle_pipe_watch,
285 if (m->idle_pipe_watch.type != WATCH_INVALID)
288 if (m->idle_pipe[2] < 0)
291 m->idle_pipe_watch.type = WATCH_IDLE_PIPE;
292 m->idle_pipe_watch.fd = m->idle_pipe[2];
293 if (m->idle_pipe_watch.fd < 0) {
294 log_error("Failed to create timerfd: %m");
299 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->idle_pipe_watch.fd, &ev) < 0) {
300 log_error("Failed to add idle_pipe fd to epoll: %m");
305 log_debug("Set up idle_pipe watch.");
310 if (m->idle_pipe_watch.fd >= 0)
311 close_nointr_nofail(m->idle_pipe_watch.fd);
312 watch_init(&m->idle_pipe_watch);
316 static void manager_unwatch_idle_pipe(Manager *m) {
317 if (m->idle_pipe_watch.type != WATCH_IDLE_PIPE)
320 assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, m->idle_pipe_watch.fd, NULL) >= 0);
321 watch_init(&m->idle_pipe_watch);
323 log_debug("Closed idle_pipe watch.");
326 static int manager_setup_time_change(Manager *m) {
327 struct epoll_event ev = {
329 .data.ptr = &m->time_change_watch,
332 /* We only care for the cancellation event, hence we set the
333 * timeout to the latest possible value. */
334 struct itimerspec its = {
335 .it_value.tv_sec = TIME_T_MAX,
337 assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX));
339 assert(m->time_change_watch.type == WATCH_INVALID);
341 /* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever
342 * CLOCK_REALTIME makes a jump relative to CLOCK_MONOTONIC */
344 m->time_change_watch.type = WATCH_TIME_CHANGE;
345 m->time_change_watch.fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC);
346 if (m->time_change_watch.fd < 0) {
347 log_error("Failed to create timerfd: %m");
351 if (timerfd_settime(m->time_change_watch.fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) < 0) {
352 log_debug("Failed to set up TFD_TIMER_CANCEL_ON_SET, ignoring: %m");
353 close_nointr_nofail(m->time_change_watch.fd);
354 watch_init(&m->time_change_watch);
358 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->time_change_watch.fd, &ev) < 0) {
359 log_error("Failed to add timer change fd to epoll: %m");
363 log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd.");
368 static int enable_special_signals(Manager *m) {
373 /* Enable that we get SIGINT on control-alt-del. In containers
374 * this will fail with EPERM (older) or EINVAL (newer), so
376 if (reboot(RB_DISABLE_CAD) < 0 && errno != EPERM && errno != EINVAL)
377 log_warning("Failed to enable ctrl-alt-del handling: %m");
379 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
381 /* Support systems without virtual console */
383 log_warning("Failed to open /dev/tty0: %m");
385 /* Enable that we get SIGWINCH on kbrequest */
386 if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
387 log_warning("Failed to enable kbrequest handling: %s", strerror(errno));
389 close_nointr_nofail(fd);
395 static int manager_setup_signals(Manager *m) {
397 struct epoll_event ev = {
399 .data.ptr = &m->signal_watch,
401 struct sigaction sa = {
402 .sa_handler = SIG_DFL,
403 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
408 /* We are not interested in SIGSTOP and friends. */
409 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
411 assert_se(sigemptyset(&mask) == 0);
413 sigset_add_many(&mask,
414 SIGCHLD, /* Child died */
415 SIGTERM, /* Reexecute daemon */
416 SIGHUP, /* Reload configuration */
417 SIGUSR1, /* systemd/upstart: reconnect to D-Bus */
418 SIGUSR2, /* systemd: dump status */
419 SIGINT, /* Kernel sends us this on control-alt-del */
420 SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */
421 SIGPWR, /* Some kernel drivers and upsd send us this on power failure */
422 SIGRTMIN+0, /* systemd: start default.target */
423 SIGRTMIN+1, /* systemd: isolate rescue.target */
424 SIGRTMIN+2, /* systemd: isolate emergency.target */
425 SIGRTMIN+3, /* systemd: start halt.target */
426 SIGRTMIN+4, /* systemd: start poweroff.target */
427 SIGRTMIN+5, /* systemd: start reboot.target */
428 SIGRTMIN+6, /* systemd: start kexec.target */
429 SIGRTMIN+13, /* systemd: Immediate halt */
430 SIGRTMIN+14, /* systemd: Immediate poweroff */
431 SIGRTMIN+15, /* systemd: Immediate reboot */
432 SIGRTMIN+16, /* systemd: Immediate kexec */
433 SIGRTMIN+20, /* systemd: enable status messages */
434 SIGRTMIN+21, /* systemd: disable status messages */
435 SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */
436 SIGRTMIN+23, /* systemd: set log level to LOG_INFO */
437 SIGRTMIN+24, /* systemd: Immediate exit (--user only) */
438 SIGRTMIN+26, /* systemd: set log target to journal-or-kmsg */
439 SIGRTMIN+27, /* systemd: set log target to console */
440 SIGRTMIN+28, /* systemd: set log target to kmsg */
441 SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg */
443 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
445 m->signal_watch.type = WATCH_SIGNAL;
446 m->signal_watch.fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
447 if (m->signal_watch.fd < 0)
450 if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0)
453 if (m->running_as == SYSTEMD_SYSTEM)
454 return enable_special_signals(m);
459 static int manager_default_environment(Manager *m) {
462 if (m->running_as == SYSTEMD_SYSTEM) {
463 /* The system manager always starts with a clean
464 * environment for its children. It does not import
465 * the kernel or the parents exported variables.
467 * The initial passed environ is untouched to keep
468 * /proc/self/environ valid; it is used for tagging
469 * the init process inside containers. */
470 m->environment = strv_new("PATH=" DEFAULT_PATH,
473 /* Import locale variables LC_*= from configuration */
474 locale_setup(&m->environment);
476 /* The user manager passes its own environment
477 * along to its children. */
478 m->environment = strv_copy(environ);
486 int manager_new(SystemdRunningAs running_as, bool reexecuting, Manager **_m) {
489 bool try_bus_connect = false;
492 assert(running_as >= 0);
493 assert(running_as < _SYSTEMD_RUNNING_AS_MAX);
495 m = new0(Manager, 1);
500 if (detect_container(NULL) <= 0)
501 boot_timestamps(&m->userspace_timestamp, &m->firmware_timestamp, &m->loader_timestamp);
504 m->running_as = running_as;
505 m->name_data_slot = m->conn_data_slot = m->subscribed_data_slot = -1;
506 m->exit_code = _MANAGER_EXIT_CODE_INVALID;
507 m->pin_cgroupfs_fd = -1;
508 m->idle_pipe[0] = m->idle_pipe[1] = m->idle_pipe[2] = m->idle_pipe[3] = -1;
510 watch_init(&m->signal_watch);
511 watch_init(&m->mount_watch);
512 watch_init(&m->swap_watch);
513 watch_init(&m->udev_watch);
514 watch_init(&m->time_change_watch);
515 watch_init(&m->jobs_in_progress_watch);
517 m->epoll_fd = m->dev_autofs_fd = -1;
518 m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
520 r = manager_default_environment(m);
524 if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
527 if (!(m->jobs = hashmap_new(trivial_hash_func, trivial_compare_func)))
530 if (!(m->watch_pids = hashmap_new(trivial_hash_func, trivial_compare_func)))
533 m->cgroup_unit = hashmap_new(string_hash_func, string_compare_func);
537 m->watch_bus = hashmap_new(string_hash_func, string_compare_func);
541 m->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
545 r = manager_setup_signals(m);
549 r = manager_setup_cgroup(m);
553 r = manager_setup_notify(m);
557 r = manager_setup_time_change(m);
561 if (running_as == SYSTEMD_SYSTEM)
562 try_bus_connect = reexecuting;
563 else if (getenv("DBUS_SESSION_BUS_ADDRESS"))
564 try_bus_connect = true;
566 log_debug("Skipping DBus session bus connection attempt - no DBUS_SESSION_BUS_ADDRESS set...");
568 /* Try to connect to the busses, if possible. */
569 r = bus_init(m, try_bus_connect);
573 m->taint_usr = dir_is_empty("/usr") > 0;
583 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
589 while ((u = m->cleanup_queue)) {
590 assert(u->in_cleanup_queue);
600 GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */
601 GC_OFFSET_UNSURE, /* No clue */
602 GC_OFFSET_GOOD, /* We still need this unit */
603 GC_OFFSET_BAD, /* We don't need this unit anymore */
607 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
614 if (u->gc_marker == gc_marker + GC_OFFSET_GOOD ||
615 u->gc_marker == gc_marker + GC_OFFSET_BAD ||
616 u->gc_marker == gc_marker + GC_OFFSET_IN_PATH)
619 if (u->in_cleanup_queue)
622 if (unit_check_gc(u))
625 u->gc_marker = gc_marker + GC_OFFSET_IN_PATH;
629 SET_FOREACH(other, u->dependencies[UNIT_REFERENCED_BY], i) {
630 unit_gc_sweep(other, gc_marker);
632 if (other->gc_marker == gc_marker + GC_OFFSET_GOOD)
635 if (other->gc_marker != gc_marker + GC_OFFSET_BAD)
642 /* We were unable to find anything out about this entry, so
643 * let's investigate it later */
644 u->gc_marker = gc_marker + GC_OFFSET_UNSURE;
645 unit_add_to_gc_queue(u);
649 /* We definitely know that this one is not useful anymore, so
650 * let's mark it for deletion */
651 u->gc_marker = gc_marker + GC_OFFSET_BAD;
652 unit_add_to_cleanup_queue(u);
656 u->gc_marker = gc_marker + GC_OFFSET_GOOD;
659 static unsigned manager_dispatch_gc_queue(Manager *m) {
666 /* log_debug("Running GC..."); */
668 m->gc_marker += _GC_OFFSET_MAX;
669 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
672 gc_marker = m->gc_marker;
674 while ((u = m->gc_queue)) {
675 assert(u->in_gc_queue);
677 unit_gc_sweep(u, gc_marker);
679 LIST_REMOVE(gc_queue, m->gc_queue, u);
680 u->in_gc_queue = false;
684 if (u->gc_marker == gc_marker + GC_OFFSET_BAD ||
685 u->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
686 log_debug_unit(u->id, "Collecting %s", u->id);
687 u->gc_marker = gc_marker + GC_OFFSET_BAD;
688 unit_add_to_cleanup_queue(u);
692 m->n_in_gc_queue = 0;
697 static void manager_clear_jobs_and_units(Manager *m) {
702 while ((u = hashmap_first(m->units)))
705 manager_dispatch_cleanup_queue(m);
707 assert(!m->load_queue);
708 assert(!m->run_queue);
709 assert(!m->dbus_unit_queue);
710 assert(!m->dbus_job_queue);
711 assert(!m->cleanup_queue);
712 assert(!m->gc_queue);
714 assert(hashmap_isempty(m->jobs));
715 assert(hashmap_isempty(m->units));
718 m->n_running_jobs = 0;
721 static void close_idle_pipe(Manager *m) {
722 close_pipe(m->idle_pipe);
723 close_pipe(m->idle_pipe + 2);
726 void manager_free(Manager *m) {
732 manager_clear_jobs_and_units(m);
734 for (c = 0; c < _UNIT_TYPE_MAX; c++)
735 if (unit_vtable[c]->shutdown)
736 unit_vtable[c]->shutdown(m);
738 /* If we reexecute ourselves, we keep the root cgroup
740 manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);
742 manager_undo_generators(m);
746 hashmap_free(m->units);
747 hashmap_free(m->jobs);
748 hashmap_free(m->watch_pids);
749 hashmap_free(m->watch_bus);
751 if (m->epoll_fd >= 0)
752 close_nointr_nofail(m->epoll_fd);
753 if (m->signal_watch.fd >= 0)
754 close_nointr_nofail(m->signal_watch.fd);
755 if (m->notify_watch.fd >= 0)
756 close_nointr_nofail(m->notify_watch.fd);
757 if (m->time_change_watch.fd >= 0)
758 close_nointr_nofail(m->time_change_watch.fd);
759 if (m->jobs_in_progress_watch.fd >= 0)
760 close_nointr_nofail(m->jobs_in_progress_watch.fd);
762 free(m->notify_socket);
764 lookup_paths_free(&m->lookup_paths);
765 strv_free(m->environment);
767 hashmap_free(m->cgroup_unit);
768 set_free_free(m->unit_path_cache);
772 free(m->switch_root);
773 free(m->switch_root_init);
775 for (i = 0; i < RLIMIT_NLIMITS; i++)
778 assert(hashmap_isempty(m->units_requiring_mounts_for));
779 hashmap_free(m->units_requiring_mounts_for);
784 int manager_enumerate(Manager *m) {
790 /* Let's ask every type to load all units from disk/kernel
791 * that it might know */
792 for (c = 0; c < _UNIT_TYPE_MAX; c++)
793 if (unit_vtable[c]->enumerate) {
794 q = unit_vtable[c]->enumerate(m);
799 manager_dispatch_load_queue(m);
803 int manager_coldplug(Manager *m) {
811 /* Then, let's set up their initial state. */
812 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
818 if ((q = unit_coldplug(u)) < 0)
825 static void manager_build_unit_path_cache(Manager *m) {
827 _cleanup_free_ DIR *d = NULL;
832 set_free_free(m->unit_path_cache);
834 m->unit_path_cache = set_new(string_hash_func, string_compare_func);
835 if (!m->unit_path_cache) {
836 log_error("Failed to allocate unit path cache.");
840 /* This simply builds a list of files we know exist, so that
841 * we don't always have to go to disk */
843 STRV_FOREACH(i, m->lookup_paths.unit_path) {
849 log_error("Failed to open directory %s: %m", *i);
853 while ((de = readdir(d))) {
856 if (ignore_file(de->d_name))
859 p = strjoin(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);
865 r = set_consume(m->unit_path_cache, p);
877 log_error("Failed to build unit path cache: %s", strerror(-r));
879 set_free_free(m->unit_path_cache);
880 m->unit_path_cache = NULL;
883 int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
888 dual_timestamp_get(&m->generators_start_timestamp);
889 manager_run_generators(m);
890 dual_timestamp_get(&m->generators_finish_timestamp);
892 r = lookup_paths_init(
893 &m->lookup_paths, m->running_as, true,
894 m->generator_unit_path,
895 m->generator_unit_path_early,
896 m->generator_unit_path_late);
900 manager_build_unit_path_cache(m);
902 /* If we will deserialize make sure that during enumeration
903 * this is already known, so we increase the counter here
908 /* First, enumerate what we can from all config files */
909 dual_timestamp_get(&m->unitsload_start_timestamp);
910 r = manager_enumerate(m);
911 dual_timestamp_get(&m->unitsload_finish_timestamp);
913 /* Second, deserialize if there is something to deserialize */
915 q = manager_deserialize(m, serialization, fds);
920 /* Any fds left? Find some unit which wants them. This is
921 * useful to allow container managers to pass some file
922 * descriptors to us pre-initialized. This enables
923 * socket-based activation of entire containers. */
924 if (fdset_size(fds) > 0) {
925 q = manager_distribute_fds(m, fds);
930 /* Third, fire things up! */
931 q = manager_coldplug(m);
936 assert(m->n_reloading > 0);
939 /* Let's wait for the UnitNew/JobNew messages being
940 * sent, before we notify that the reload is
942 m->send_reloading_done = true;
948 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, DBusError *e, Job **_ret) {
953 assert(type < _JOB_TYPE_MAX);
955 assert(mode < _JOB_MODE_MAX);
957 if (mode == JOB_ISOLATE && type != JOB_START) {
958 dbus_set_error(e, BUS_ERROR_INVALID_JOB_MODE, "Isolate is only valid for start.");
962 if (mode == JOB_ISOLATE && !unit->allow_isolate) {
963 dbus_set_error(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
967 log_debug_unit(unit->id,
968 "Trying to enqueue job %s/%s/%s", unit->id,
969 job_type_to_string(type), job_mode_to_string(mode));
971 job_type_collapse(&type, unit);
973 tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY);
977 r = transaction_add_job_and_dependencies(tr, type, unit, NULL, true, override, false,
978 mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
979 mode == JOB_IGNORE_DEPENDENCIES, e);
983 if (mode == JOB_ISOLATE) {
984 r = transaction_add_isolate_jobs(tr, m);
989 r = transaction_activate(tr, m, mode, e);
993 log_debug_unit(unit->id,
994 "Enqueued job %s/%s as %u", unit->id,
995 job_type_to_string(type), (unsigned) tr->anchor_job->id);
998 *_ret = tr->anchor_job;
1000 transaction_free(tr);
1004 transaction_abort(tr);
1005 transaction_free(tr);
1009 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, DBusError *e, Job **_ret) {
1014 assert(type < _JOB_TYPE_MAX);
1016 assert(mode < _JOB_MODE_MAX);
1018 r = manager_load_unit(m, name, NULL, NULL, &unit);
1022 return manager_add_job(m, type, unit, mode, override, e, _ret);
1025 Job *manager_get_job(Manager *m, uint32_t id) {
1028 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1031 Unit *manager_get_unit(Manager *m, const char *name) {
1035 return hashmap_get(m->units, name);
1038 unsigned manager_dispatch_load_queue(Manager *m) {
1044 /* Make sure we are not run recursively */
1045 if (m->dispatching_load_queue)
1048 m->dispatching_load_queue = true;
1050 /* Dispatches the load queue. Takes a unit from the queue and
1051 * tries to load its data until the queue is empty */
1053 while ((u = m->load_queue)) {
1054 assert(u->in_load_queue);
1060 m->dispatching_load_queue = false;
1064 int manager_load_unit_prepare(
1076 assert(name || path);
1078 /* This will prepare the unit for loading, but not actually
1079 * load anything from disk. */
1081 if (path && !is_path(path)) {
1082 dbus_set_error(e, BUS_ERROR_INVALID_PATH, "Path %s is not absolute.", path);
1087 name = path_get_file_name(path);
1089 t = unit_name_to_type(name);
1091 if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, false)) {
1092 dbus_set_error(e, BUS_ERROR_INVALID_NAME, "Unit name %s is not valid.", name);
1096 ret = manager_get_unit(m, name);
1102 ret = unit_new(m, unit_vtable[t]->object_size);
1107 ret->fragment_path = strdup(path);
1108 if (!ret->fragment_path) {
1114 r = unit_add_name(ret, name);
1120 unit_add_to_load_queue(ret);
1121 unit_add_to_dbus_queue(ret);
1122 unit_add_to_gc_queue(ret);
1130 int manager_load_unit(
1141 /* This will load the service information files, but not actually
1142 * start any services or anything. */
1144 r = manager_load_unit_prepare(m, name, path, e, _ret);
1148 manager_dispatch_load_queue(m);
1151 *_ret = unit_follow_merge(*_ret);
1156 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {
1163 HASHMAP_FOREACH(j, s->jobs, i)
1164 job_dump(j, f, prefix);
1167 void manager_dump_units(Manager *s, FILE *f, const char *prefix) {
1175 HASHMAP_FOREACH_KEY(u, t, s->units, i)
1177 unit_dump(u, f, prefix);
1180 void manager_clear_jobs(Manager *m) {
1185 while ((j = hashmap_first(m->jobs)))
1186 /* No need to recurse. We're cancelling all jobs. */
1187 job_finish_and_invalidate(j, JOB_CANCELED, false);
1190 unsigned manager_dispatch_run_queue(Manager *m) {
1194 if (m->dispatching_run_queue)
1197 m->dispatching_run_queue = true;
1199 while ((j = m->run_queue)) {
1200 assert(j->installed);
1201 assert(j->in_run_queue);
1203 job_run_and_invalidate(j);
1207 m->dispatching_run_queue = false;
1209 if (m->n_running_jobs > 0)
1210 manager_watch_jobs_in_progress(m);
1212 if (m->n_on_console > 0)
1213 manager_watch_idle_pipe(m);
1218 unsigned manager_dispatch_dbus_queue(Manager *m) {
1225 if (m->dispatching_dbus_queue)
1228 m->dispatching_dbus_queue = true;
1230 while ((u = m->dbus_unit_queue)) {
1231 assert(u->in_dbus_queue);
1233 bus_unit_send_change_signal(u);
1237 while ((j = m->dbus_job_queue)) {
1238 assert(j->in_dbus_queue);
1240 bus_job_send_change_signal(j);
1244 m->dispatching_dbus_queue = false;
1246 if (m->send_reloading_done) {
1247 m->send_reloading_done = false;
1249 bus_broadcast_reloading(m, false);
1255 static int manager_process_notify_fd(Manager *m) {
1262 struct iovec iovec = {
1264 .iov_len = sizeof(buf)-1,
1268 struct cmsghdr cmsghdr;
1269 uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
1272 struct msghdr msghdr = {
1275 .msg_control = &control,
1276 .msg_controllen = sizeof(control),
1278 struct ucred *ucred;
1280 _cleanup_strv_free_ char **tags = NULL;
1282 n = recvmsg(m->notify_watch.fd, &msghdr, MSG_DONTWAIT);
1287 if (errno == EAGAIN || errno == EINTR)
1293 if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||
1294 control.cmsghdr.cmsg_level != SOL_SOCKET ||
1295 control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||
1296 control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
1297 log_warning("Received notify message without credentials. Ignoring.");
1301 ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
1303 u = hashmap_get(m->watch_pids, LONG_TO_PTR(ucred->pid));
1305 u = manager_get_unit_by_pid(m, ucred->pid);
1307 log_warning("Cannot find unit for notify message of PID %lu.", (unsigned long) ucred->pid);
1312 assert((size_t) n < sizeof(buf));
1314 tags = strv_split(buf, "\n\r");
1318 log_debug_unit(u->id, "Got notification message for unit %s", u->id);
1320 if (UNIT_VTABLE(u)->notify_message)
1321 UNIT_VTABLE(u)->notify_message(u, ucred->pid, tags);
1327 static int manager_dispatch_sigchld(Manager *m) {
1335 /* First we call waitd() for a PID and do not reap the
1336 * zombie. That way we can still access /proc/$PID for
1337 * it while it is a zombie. */
1338 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
1340 if (errno == ECHILD)
1352 if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
1353 _cleanup_free_ char *name = NULL;
1355 get_process_comm(si.si_pid, &name);
1356 log_debug("Got SIGCHLD for process %lu (%s)", (unsigned long) si.si_pid, strna(name));
1359 /* Let's flush any message the dying child might still
1360 * have queued for us. This ensures that the process
1361 * still exists in /proc so that we can figure out
1362 * which cgroup and hence unit it belongs to. */
1363 r = manager_process_notify_fd(m);
1367 /* And now figure out the unit this belongs to */
1368 u = hashmap_get(m->watch_pids, LONG_TO_PTR(si.si_pid));
1370 u = manager_get_unit_by_pid(m, si.si_pid);
1372 /* And now, we actually reap the zombie. */
1373 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
1380 if (si.si_code != CLD_EXITED && si.si_code != CLD_KILLED && si.si_code != CLD_DUMPED)
1383 log_debug("Child %lu died (code=%s, status=%i/%s)",
1384 (long unsigned) si.si_pid,
1385 sigchld_code_to_string(si.si_code),
1387 strna(si.si_code == CLD_EXITED
1388 ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)
1389 : signal_to_string(si.si_status)));
1394 log_debug_unit(u->id,
1395 "Child %lu belongs to %s", (long unsigned) si.si_pid, u->id);
1397 hashmap_remove(m->watch_pids, LONG_TO_PTR(si.si_pid));
1398 UNIT_VTABLE(u)->sigchld_event(u, si.si_pid, si.si_code, si.si_status);
1404 static int manager_start_target(Manager *m, const char *name, JobMode mode) {
1408 dbus_error_init(&error);
1410 log_debug_unit(name, "Activating special unit %s", name);
1412 r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL);
1414 log_error_unit(name,
1415 "Failed to enqueue %s job: %s", name, bus_error(&error, r));
1417 dbus_error_free(&error);
1422 static int manager_process_signal_fd(Manager *m) {
1424 struct signalfd_siginfo sfsi;
1425 bool sigchld = false;
1430 n = read(m->signal_watch.fd, &sfsi, sizeof(sfsi));
1431 if (n != sizeof(sfsi)) {
1436 if (errno == EINTR || errno == EAGAIN)
1442 if (sfsi.ssi_pid > 0) {
1445 get_process_comm(sfsi.ssi_pid, &p);
1447 log_debug("Received SIG%s from PID %lu (%s).",
1448 signal_to_string(sfsi.ssi_signo),
1449 (unsigned long) sfsi.ssi_pid, strna(p));
1452 log_debug("Received SIG%s.", signal_to_string(sfsi.ssi_signo));
1454 switch (sfsi.ssi_signo) {
1461 if (m->running_as == SYSTEMD_SYSTEM) {
1462 /* This is for compatibility with the
1463 * original sysvinit */
1464 m->exit_code = MANAGER_REEXECUTE;
1471 if (m->running_as == SYSTEMD_SYSTEM) {
1472 manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE_IRREVERSIBLY);
1476 /* Run the exit target if there is one, if not, just exit. */
1477 if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) {
1478 m->exit_code = MANAGER_EXIT;
1485 if (m->running_as == SYSTEMD_SYSTEM)
1486 manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
1488 /* This is a nop on non-init */
1492 if (m->running_as == SYSTEMD_SYSTEM)
1493 manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);
1495 /* This is a nop on non-init */
1501 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
1503 if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
1504 log_info("Trying to reconnect to bus...");
1508 if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
1509 log_info("Loading D-Bus service...");
1510 manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
1521 if (!(f = open_memstream(&dump, &size))) {
1522 log_warning("Failed to allocate memory stream.");
1526 manager_dump_units(m, f, "\t");
1527 manager_dump_jobs(m, f, "\t");
1532 log_warning("Failed to write status stream");
1537 log_dump(LOG_INFO, dump);
1544 m->exit_code = MANAGER_RELOAD;
1549 /* Starting SIGRTMIN+0 */
1550 static const char * const target_table[] = {
1551 [0] = SPECIAL_DEFAULT_TARGET,
1552 [1] = SPECIAL_RESCUE_TARGET,
1553 [2] = SPECIAL_EMERGENCY_TARGET,
1554 [3] = SPECIAL_HALT_TARGET,
1555 [4] = SPECIAL_POWEROFF_TARGET,
1556 [5] = SPECIAL_REBOOT_TARGET,
1557 [6] = SPECIAL_KEXEC_TARGET
1560 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
1561 static const ManagerExitCode code_table[] = {
1563 [1] = MANAGER_POWEROFF,
1564 [2] = MANAGER_REBOOT,
1568 if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&
1569 (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {
1570 int idx = (int) sfsi.ssi_signo - SIGRTMIN;
1571 manager_start_target(m, target_table[idx],
1572 (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE);
1576 if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
1577 (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) {
1578 m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13];
1582 switch (sfsi.ssi_signo - SIGRTMIN) {
1585 log_debug("Enabling showing of status.");
1586 manager_set_show_status(m, true);
1590 log_debug("Disabling showing of status.");
1591 manager_set_show_status(m, false);
1595 log_set_max_level(LOG_DEBUG);
1596 log_notice("Setting log level to debug.");
1600 log_set_max_level(LOG_INFO);
1601 log_notice("Setting log level to info.");
1605 if (m->running_as == SYSTEMD_USER) {
1606 m->exit_code = MANAGER_EXIT;
1610 /* This is a nop on init */
1614 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1615 log_notice("Setting log target to journal-or-kmsg.");
1619 log_set_target(LOG_TARGET_CONSOLE);
1620 log_notice("Setting log target to console.");
1624 log_set_target(LOG_TARGET_KMSG);
1625 log_notice("Setting log target to kmsg.");
1629 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1630 log_notice("Setting log target to syslog-or-kmsg.");
1634 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
1641 return manager_dispatch_sigchld(m);
1646 static int process_event(Manager *m, struct epoll_event *ev) {
1653 assert_se(w = ev->data.ptr);
1655 if (w->type == WATCH_INVALID)
1662 /* An incoming signal? */
1663 if (ev->events != EPOLLIN)
1666 if ((r = manager_process_signal_fd(m)) < 0)
1673 /* An incoming daemon notification event? */
1674 if (ev->events != EPOLLIN)
1677 if ((r = manager_process_notify_fd(m)) < 0)
1684 /* Some fd event, to be dispatched to the units */
1685 UNIT_VTABLE(w->data.unit)->fd_event(w->data.unit, w->fd, ev->events, w);
1688 case WATCH_UNIT_TIMER:
1689 case WATCH_JOB_TIMER: {
1693 /* Some timer event, to be dispatched to the units */
1694 k = read(w->fd, &v, sizeof(v));
1695 if (k != sizeof(v)) {
1697 if (k < 0 && (errno == EINTR || errno == EAGAIN))
1700 log_error("Failed to read timer event counter: %s", k < 0 ? strerror(-k) : "Short read");
1701 return k < 0 ? -errno : -EIO;
1704 if (w->type == WATCH_UNIT_TIMER)
1705 UNIT_VTABLE(w->data.unit)->timer_event(w->data.unit, v, w);
1707 job_timer_event(w->data.job, v, w);
1712 /* Some mount table change, intended for the mount subsystem */
1713 mount_fd_event(m, ev->events);
1717 /* Some swap table change, intended for the swap subsystem */
1718 swap_fd_event(m, ev->events);
1722 /* Some notification from udev, intended for the device subsystem */
1723 device_fd_event(m, ev->events);
1726 case WATCH_DBUS_WATCH:
1727 bus_watch_event(m, w, ev->events);
1730 case WATCH_DBUS_TIMEOUT:
1731 bus_timeout_event(m, w, ev->events);
1734 case WATCH_TIME_CHANGE: {
1738 log_struct(LOG_INFO,
1739 MESSAGE_ID(SD_MESSAGE_TIME_CHANGE),
1740 "MESSAGE=Time has been changed",
1743 /* Restart the watch */
1744 epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, m->time_change_watch.fd,
1746 close_nointr_nofail(m->time_change_watch.fd);
1747 watch_init(&m->time_change_watch);
1748 manager_setup_time_change(m);
1750 HASHMAP_FOREACH(u, m->units, i) {
1751 if (UNIT_VTABLE(u)->time_change)
1752 UNIT_VTABLE(u)->time_change(u);
1758 case WATCH_JOBS_IN_PROGRESS: {
1761 /* not interested in the data */
1762 read(w->fd, &v, sizeof(v));
1764 manager_print_jobs_in_progress(m);
1768 case WATCH_IDLE_PIPE: {
1769 m->no_console_output = true;
1771 manager_unwatch_idle_pipe(m);
1777 log_error("event type=%i", w->type);
1778 assert_not_reached("Unknown epoll event type.");
1784 int manager_loop(Manager *m) {
1787 RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);
1790 m->exit_code = MANAGER_RUNNING;
1792 /* Release the path cache */
1793 set_free_free(m->unit_path_cache);
1794 m->unit_path_cache = NULL;
1796 manager_check_finished(m);
1798 /* There might still be some zombies hanging around from
1799 * before we were exec()'ed. Let's reap them. */
1800 r = manager_dispatch_sigchld(m);
1804 while (m->exit_code == MANAGER_RUNNING) {
1805 struct epoll_event event;
1809 if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM)
1812 if (!ratelimit_test(&rl)) {
1813 /* Yay, something is going seriously wrong, pause a little */
1814 log_warning("Looping too fast. Throttling execution a little.");
1819 if (manager_dispatch_load_queue(m) > 0)
1822 if (manager_dispatch_gc_queue(m) > 0)
1825 if (manager_dispatch_cleanup_queue(m) > 0)
1828 if (manager_dispatch_cgroup_queue(m) > 0)
1831 if (manager_dispatch_run_queue(m) > 0)
1834 if (bus_dispatch(m) > 0)
1837 if (manager_dispatch_dbus_queue(m) > 0)
1840 if (swap_dispatch_reload(m) > 0)
1843 /* Sleep for half the watchdog time */
1844 if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM) {
1845 wait_msec = (int) (m->runtime_watchdog / 2 / USEC_PER_MSEC);
1851 n = epoll_wait(m->epoll_fd, &event, 1, wait_msec);
1863 r = process_event(m, &event);
1868 return m->exit_code;
1871 int manager_load_unit_from_dbus_path(Manager *m, const char *s, DBusError *e, Unit **_u) {
1872 _cleanup_free_ char *n = NULL;
1880 r = unit_name_from_dbus_path(s, &n);
1884 r = manager_load_unit(m, n, NULL, e, &u);
1893 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
1902 if (!startswith(s, "/org/freedesktop/systemd1/job/"))
1905 r = safe_atou(s + 30, &id);
1909 j = manager_get_job(m, id);
1918 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {
1924 audit_fd = get_audit_fd();
1928 /* Don't generate audit events if the service was already
1929 * started and we're just deserializing */
1930 if (m->n_reloading > 0)
1933 if (m->running_as != SYSTEMD_SYSTEM)
1936 if (u->type != UNIT_SERVICE)
1939 p = unit_name_to_prefix_and_instance(u->id);
1941 log_error_unit(u->id,
1942 "Failed to allocate unit name for audit message: %s", strerror(ENOMEM));
1946 if (audit_log_user_comm_message(audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) {
1947 if (errno == EPERM) {
1948 /* We aren't allowed to send audit messages?
1949 * Then let's not retry again. */
1952 log_warning("Failed to send audit message: %m");
1960 void manager_send_unit_plymouth(Manager *m, Unit *u) {
1962 union sockaddr_union sa;
1964 char *message = NULL;
1966 /* Don't generate plymouth events if the service was already
1967 * started and we're just deserializing */
1968 if (m->n_reloading > 0)
1971 if (m->running_as != SYSTEMD_SYSTEM)
1974 if (u->type != UNIT_SERVICE &&
1975 u->type != UNIT_MOUNT &&
1976 u->type != UNIT_SWAP)
1979 /* We set SOCK_NONBLOCK here so that we rather drop the
1980 * message then wait for plymouth */
1981 fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
1983 log_error("socket() failed: %m");
1988 sa.sa.sa_family = AF_UNIX;
1989 strncpy(sa.un.sun_path+1, "/org/freedesktop/plymouthd", sizeof(sa.un.sun_path)-1);
1990 if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
1992 if (errno != EPIPE &&
1995 errno != ECONNREFUSED &&
1996 errno != ECONNRESET &&
1997 errno != ECONNABORTED)
1998 log_error("connect() failed: %m");
2003 if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0) {
2009 if (write(fd, message, n + 1) != n + 1) {
2011 if (errno != EPIPE &&
2014 errno != ECONNREFUSED &&
2015 errno != ECONNRESET &&
2016 errno != ECONNABORTED)
2017 log_error("Failed to write Plymouth message: %m");
2024 close_nointr_nofail(fd);
2029 void manager_dispatch_bus_name_owner_changed(
2032 const char* old_owner,
2033 const char *new_owner) {
2040 if (!(u = hashmap_get(m->watch_bus, name)))
2043 UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
2046 void manager_dispatch_bus_query_pid_done(
2057 if (!(u = hashmap_get(m->watch_bus, name)))
2060 UNIT_VTABLE(u)->bus_query_pid_done(u, name, pid);
2063 int manager_open_serialization(Manager *m, FILE **_f) {
2070 if (m->running_as == SYSTEMD_SYSTEM)
2071 asprintf(&path, "/run/systemd/dump-%lu-XXXXXX", (unsigned long) getpid());
2073 asprintf(&path, "/tmp/systemd-dump-%lu-XXXXXX", (unsigned long) getpid());
2078 RUN_WITH_UMASK(0077) {
2079 fd = mkostemp(path, O_RDWR|O_CLOEXEC);
2089 log_debug("Serializing state to %s", path);
2092 f = fdopen(fd, "w+");
2101 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root) {
2114 fprintf(f, "current-job-id=%i\n", m->current_job_id);
2115 fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr));
2116 fprintf(f, "n-installed-jobs=%u\n", m->n_installed_jobs);
2117 fprintf(f, "n-failed-jobs=%u\n", m->n_failed_jobs);
2119 dual_timestamp_serialize(f, "firmware-timestamp", &m->firmware_timestamp);
2120 dual_timestamp_serialize(f, "kernel-timestamp", &m->kernel_timestamp);
2121 dual_timestamp_serialize(f, "loader-timestamp", &m->loader_timestamp);
2122 dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp);
2125 dual_timestamp_serialize(f, "userspace-timestamp", &m->userspace_timestamp);
2126 dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp);
2129 if (!switching_root) {
2130 STRV_FOREACH(e, m->environment) {
2131 _cleanup_free_ char *ce;
2135 fprintf(f, "env=%s\n", *e);
2139 bus_serialize(m, f);
2143 HASHMAP_FOREACH_KEY(u, t, m->units, i) {
2147 if (!unit_can_serialize(u))
2154 r = unit_serialize(u, f, fds, !switching_root);
2161 assert(m->n_reloading > 0);
2167 r = bus_fdset_add_all(m, fds);
2174 int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
2180 log_debug("Deserializing state...");
2185 char line[LINE_MAX], *l;
2187 if (!fgets(line, sizeof(line), f)) {
2202 if (startswith(l, "current-job-id=")) {
2205 if (safe_atou32(l+15, &id) < 0)
2206 log_debug("Failed to parse current job id value %s", l+15);
2208 m->current_job_id = MAX(m->current_job_id, id);
2209 } else if (startswith(l, "n-installed-jobs=")) {
2212 if (safe_atou32(l+17, &n) < 0)
2213 log_debug("Failed to parse installed jobs counter %s", l+17);
2215 m->n_installed_jobs += n;
2216 } else if (startswith(l, "n-failed-jobs=")) {
2219 if (safe_atou32(l+14, &n) < 0)
2220 log_debug("Failed to parse failed jobs counter %s", l+14);
2222 m->n_failed_jobs += n;
2223 } else if (startswith(l, "taint-usr=")) {
2226 if ((b = parse_boolean(l+10)) < 0)
2227 log_debug("Failed to parse taint /usr flag %s", l+10);
2229 m->taint_usr = m->taint_usr || b;
2230 } else if (startswith(l, "firmware-timestamp="))
2231 dual_timestamp_deserialize(l+19, &m->firmware_timestamp);
2232 else if (startswith(l, "loader-timestamp="))
2233 dual_timestamp_deserialize(l+17, &m->loader_timestamp);
2234 else if (startswith(l, "kernel-timestamp="))
2235 dual_timestamp_deserialize(l+17, &m->kernel_timestamp);
2236 else if (startswith(l, "initrd-timestamp="))
2237 dual_timestamp_deserialize(l+17, &m->initrd_timestamp);
2238 else if (startswith(l, "userspace-timestamp="))
2239 dual_timestamp_deserialize(l+20, &m->userspace_timestamp);
2240 else if (startswith(l, "finish-timestamp="))
2241 dual_timestamp_deserialize(l+17, &m->finish_timestamp);
2242 else if (startswith(l, "env=")) {
2243 _cleanup_free_ char *uce = NULL;
2246 uce = cunescape(l+4);
2252 e = strv_env_set(m->environment, uce);
2258 strv_free(m->environment);
2260 } else if (bus_deserialize_item(m, l) == 0)
2261 log_debug("Unknown serialization item '%s'", l);
2266 char name[UNIT_NAME_MAX+2];
2269 if (!fgets(name, sizeof(name), f)) {
2280 r = manager_load_unit(m, strstrip(name), NULL, NULL, &u);
2284 r = unit_deserialize(u, f, fds);
2295 assert(m->n_reloading > 0);
2301 int manager_distribute_fds(Manager *m, FDSet *fds) {
2308 HASHMAP_FOREACH(u, m->units, i) {
2310 if (fdset_size(fds) <= 0)
2313 if (UNIT_VTABLE(u)->distribute_fds) {
2314 r = UNIT_VTABLE(u)->distribute_fds(u, fds);
2323 int manager_reload(Manager *m) {
2325 _cleanup_fclose_ FILE *f = NULL;
2326 _cleanup_fdset_free_ FDSet *fds = NULL;
2330 r = manager_open_serialization(m, &f);
2335 bus_broadcast_reloading(m, true);
2343 r = manager_serialize(m, f, fds, false);
2349 if (fseeko(f, 0, SEEK_SET) < 0) {
2354 /* From here on there is no way back. */
2355 manager_clear_jobs_and_units(m);
2356 manager_undo_generators(m);
2357 lookup_paths_free(&m->lookup_paths);
2359 /* Find new unit paths */
2360 manager_run_generators(m);
2362 q = lookup_paths_init(
2363 &m->lookup_paths, m->running_as, true,
2364 m->generator_unit_path,
2365 m->generator_unit_path_early,
2366 m->generator_unit_path_late);
2370 manager_build_unit_path_cache(m);
2372 /* First, enumerate what we can from all config files */
2373 q = manager_enumerate(m);
2377 /* Second, deserialize our stored data */
2378 q = manager_deserialize(m, f, fds);
2385 /* Third, fire things up! */
2386 q = manager_coldplug(m);
2390 assert(m->n_reloading > 0);
2393 m->send_reloading_done = true;
2398 static bool manager_is_booting_or_shutting_down(Manager *m) {
2403 /* Is the initial job still around? */
2404 if (manager_get_job(m, m->default_unit_job_id))
2407 /* Is there a job for the shutdown target? */
2408 u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
2415 bool manager_is_reloading_or_reexecuting(Manager *m) {
2418 return m->n_reloading != 0;
2421 void manager_reset_failed(Manager *m) {
2427 HASHMAP_FOREACH(u, m->units, i)
2428 unit_reset_failed(u);
2431 bool manager_unit_inactive_or_pending(Manager *m, const char *name) {
2437 /* Returns true if the unit is inactive or going down */
2438 u = manager_get_unit(m, name);
2442 return unit_inactive_or_pending(u);
2445 void manager_check_finished(Manager *m) {
2446 char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
2447 usec_t firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec;
2451 if (m->n_running_jobs == 0)
2452 manager_unwatch_jobs_in_progress(m);
2454 if (hashmap_size(m->jobs) > 0) {
2455 manager_jobs_in_progress_mod_timer(m);
2459 /* Notify Type=idle units that we are done now */
2460 manager_unwatch_idle_pipe(m);
2463 /* Turn off confirm spawn now */
2464 m->confirm_spawn = false;
2466 if (dual_timestamp_is_set(&m->finish_timestamp))
2469 dual_timestamp_get(&m->finish_timestamp);
2471 if (m->running_as == SYSTEMD_SYSTEM && detect_container(NULL) <= 0) {
2473 /* Note that m->kernel_usec.monotonic is always at 0,
2474 * and m->firmware_usec.monotonic and
2475 * m->loader_usec.monotonic should be considered
2476 * negative values. */
2478 firmware_usec = m->firmware_timestamp.monotonic - m->loader_timestamp.monotonic;
2479 loader_usec = m->loader_timestamp.monotonic - m->kernel_timestamp.monotonic;
2480 userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;
2481 total_usec = m->firmware_timestamp.monotonic + m->finish_timestamp.monotonic;
2483 if (dual_timestamp_is_set(&m->initrd_timestamp)) {
2485 kernel_usec = m->initrd_timestamp.monotonic - m->kernel_timestamp.monotonic;
2486 initrd_usec = m->userspace_timestamp.monotonic - m->initrd_timestamp.monotonic;
2488 if (!log_on_console())
2489 log_struct(LOG_INFO,
2490 MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2491 "KERNEL_USEC=%llu", (unsigned long long) kernel_usec,
2492 "INITRD_USEC=%llu", (unsigned long long) initrd_usec,
2493 "USERSPACE_USEC=%llu", (unsigned long long) userspace_usec,
2494 "MESSAGE=Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
2495 format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
2496 format_timespan(initrd, sizeof(initrd), initrd_usec, USEC_PER_MSEC),
2497 format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
2498 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
2501 kernel_usec = m->userspace_timestamp.monotonic - m->kernel_timestamp.monotonic;
2504 if (!log_on_console())
2505 log_struct(LOG_INFO,
2506 MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2507 "KERNEL_USEC=%llu", (unsigned long long) kernel_usec,
2508 "USERSPACE_USEC=%llu", (unsigned long long) userspace_usec,
2509 "MESSAGE=Startup finished in %s (kernel) + %s (userspace) = %s.",
2510 format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
2511 format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
2512 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
2516 firmware_usec = loader_usec = initrd_usec = kernel_usec = 0;
2517 total_usec = userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;
2519 if (!log_on_console())
2520 log_struct(LOG_INFO,
2521 MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2522 "USERSPACE_USEC=%llu", (unsigned long long) userspace_usec,
2523 "MESSAGE=Startup finished in %s.",
2524 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
2528 bus_broadcast_finished(m, firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec);
2531 "READY=1\nSTATUS=Startup finished in %s.",
2532 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC));
2535 static int create_generator_dir(Manager *m, char **generator, const char *name) {
2546 if (m->running_as == SYSTEMD_SYSTEM && getpid() == 1) {
2548 p = strappend("/run/systemd/", name);
2552 r = mkdir_p_label(p, 0755);
2554 log_error("Failed to create generator directory %s: %s",
2560 p = strjoin("/tmp/systemd-", name, ".XXXXXX", NULL);
2565 log_error("Failed to create generator directory %s: %m",
2576 static void trim_generator_dir(Manager *m, char **generator) {
2583 if (rmdir(*generator) >= 0) {
2591 void manager_run_generators(Manager *m) {
2593 const char *generator_path;
2594 const char *argv[5];
2599 generator_path = m->running_as == SYSTEMD_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH;
2600 d = opendir(generator_path);
2602 if (errno == ENOENT)
2605 log_error("Failed to enumerate generator directory %s: %m",
2610 r = create_generator_dir(m, &m->generator_unit_path, "generator");
2614 r = create_generator_dir(m, &m->generator_unit_path_early, "generator.early");
2618 r = create_generator_dir(m, &m->generator_unit_path_late, "generator.late");
2622 argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
2623 argv[1] = m->generator_unit_path;
2624 argv[2] = m->generator_unit_path_early;
2625 argv[3] = m->generator_unit_path_late;
2628 RUN_WITH_UMASK(0022) {
2629 execute_directory(generator_path, d, (char**) argv);
2632 trim_generator_dir(m, &m->generator_unit_path);
2633 trim_generator_dir(m, &m->generator_unit_path_early);
2634 trim_generator_dir(m, &m->generator_unit_path_late);
2641 static void remove_generator_dir(Manager *m, char **generator) {
2648 strv_remove(m->lookup_paths.unit_path, *generator);
2649 rm_rf(*generator, false, true, false);
2655 void manager_undo_generators(Manager *m) {
2658 remove_generator_dir(m, &m->generator_unit_path);
2659 remove_generator_dir(m, &m->generator_unit_path_early);
2660 remove_generator_dir(m, &m->generator_unit_path_late);
2663 int manager_environment_add(Manager *m, char **environment) {
2667 e = strv_env_merge(2, m->environment, environment);
2671 strv_free(m->environment);
2677 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit) {
2682 for (i = 0; i < RLIMIT_NLIMITS; i++) {
2683 if (!default_rlimit[i])
2686 m->rlimit[i] = newdup(struct rlimit, default_rlimit[i], 1);
2694 void manager_recheck_journal(Manager *m) {
2699 if (m->running_as != SYSTEMD_SYSTEM)
2702 u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET);
2703 if (u && SOCKET(u)->state != SOCKET_RUNNING) {
2704 log_close_journal();
2708 u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE);
2709 if (u && SERVICE(u)->state != SERVICE_RUNNING) {
2710 log_close_journal();
2714 /* Hmm, OK, so the socket is fully up and the service is up
2715 * too, then let's make use of the thing. */
2719 void manager_set_show_status(Manager *m, bool b) {
2722 if (m->running_as != SYSTEMD_SYSTEM)
2728 touch("/run/systemd/show-status");
2730 unlink("/run/systemd/show-status");
2733 static bool manager_get_show_status(Manager *m) {
2736 if (m->running_as != SYSTEMD_SYSTEM)
2739 if (m->no_console_output)
2745 /* If Plymouth is running make sure we show the status, so
2746 * that there's something nice to see when people press Esc */
2748 return plymouth_running();
2751 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) {
2754 if (!manager_get_show_status(m))
2757 /* XXX We should totally drop the check for ephemeral here
2758 * and thus effectively make 'Type=idle' pointless. */
2759 if (ephemeral && m->n_on_console > 0)
2762 if (!manager_is_booting_or_shutting_down(m))
2765 va_start(ap, format);
2766 status_vprintf(status, true, ephemeral, format, ap);
2770 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found) {
2771 _cleanup_free_ char *p = NULL;
2779 p = unit_name_from_path(path, suffix);
2783 found = manager_get_unit(m, p);
2793 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path) {
2794 char p[strlen(path)+1];
2800 path_kill_slashes(p);
2802 return hashmap_get(m->units_requiring_mounts_for, streq(p, "/") ? "" : p);
2805 void watch_init(Watch *w) {
2808 w->type = WATCH_INVALID;