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/>.
29 #include <sys/reboot.h>
30 #include <sys/ioctl.h>
34 #include <sys/types.h>
37 #include <sys/timerfd.h>
43 #include "sd-daemon.h"
45 #include "sd-messages.h"
48 #include "transaction.h"
55 #include "ratelimit.h"
56 #include "locale-setup.h"
57 #include "mount-setup.h"
58 #include "unit-name.h"
60 #include "path-lookup.h"
62 #include "exit-status.h"
65 #include "cgroup-util.h"
66 #include "path-util.h"
68 #include "boot-timestamps.h"
70 #include "bus-errors.h"
71 #include "bus-error.h"
74 #include "dbus-unit.h"
76 #include "dbus-manager.h"
77 #include "bus-kernel.h"
79 /* As soon as 5s passed since a unit was added to our GC queue, make sure to run a gc sweep */
80 #define GC_QUEUE_USEC_MAX (10*USEC_PER_SEC)
82 /* Initial delay and the interval for printing status messages about running jobs */
83 #define JOBS_IN_PROGRESS_WAIT_USEC (5*USEC_PER_SEC)
84 #define JOBS_IN_PROGRESS_PERIOD_USEC (USEC_PER_SEC / 3)
85 #define JOBS_IN_PROGRESS_PERIOD_DIVISOR 3
87 /* Where clients shall send notification messages to */
88 #define NOTIFY_SOCKET "@/org/freedesktop/systemd1/notify"
90 #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
92 static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
93 static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
94 static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
95 static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
96 static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata);
97 static int manager_dispatch_run_queue(sd_event_source *source, void *userdata);
99 static int manager_watch_jobs_in_progress(Manager *m) {
104 if (m->jobs_in_progress_event_source)
107 next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC;
108 return sd_event_add_monotonic(m->event, next, 0, manager_dispatch_jobs_in_progress, m, &m->jobs_in_progress_event_source);
111 #define CYLON_BUFFER_EXTRA (2*(sizeof(ANSI_RED_ON)-1) + sizeof(ANSI_HIGHLIGHT_RED_ON)-1 + 2*(sizeof(ANSI_HIGHLIGHT_OFF)-1))
113 static void draw_cylon(char buffer[], size_t buflen, unsigned width, unsigned pos) {
116 assert(buflen >= CYLON_BUFFER_EXTRA + width + 1);
117 assert(pos <= width+1); /* 0 or width+1 mean that the center light is behind the corner */
121 p = mempset(p, ' ', pos-2);
122 p = stpcpy(p, ANSI_RED_ON);
126 if (pos > 0 && pos <= width) {
127 p = stpcpy(p, ANSI_HIGHLIGHT_RED_ON);
131 p = stpcpy(p, ANSI_HIGHLIGHT_OFF);
134 p = stpcpy(p, ANSI_RED_ON);
137 p = mempset(p, ' ', width-1-pos);
138 strcpy(p, ANSI_HIGHLIGHT_OFF);
142 void manager_flip_auto_status(Manager *m, bool enable) {
144 if (m->show_status == SHOW_STATUS_AUTO)
145 manager_set_show_status(m, SHOW_STATUS_TEMPORARY);
147 if (m->show_status == SHOW_STATUS_TEMPORARY)
148 manager_set_show_status(m, SHOW_STATUS_AUTO);
152 static void manager_print_jobs_in_progress(Manager *m) {
153 _cleanup_free_ char *job_of_n = NULL;
156 unsigned counter = 0, print_nr;
157 char cylon[6 + CYLON_BUFFER_EXTRA + 1];
159 char time[FORMAT_TIMESPAN_MAX], limit[FORMAT_TIMESPAN_MAX] = "no limit";
164 manager_flip_auto_status(m, true);
166 print_nr = (m->jobs_in_progress_iteration / JOBS_IN_PROGRESS_PERIOD_DIVISOR) % m->n_running_jobs;
168 HASHMAP_FOREACH(j, m->jobs, i)
169 if (j->state == JOB_RUNNING && counter++ == print_nr)
172 /* m->n_running_jobs must be consistent with the contents of m->jobs,
173 * so the above loop must have succeeded in finding j. */
174 assert(counter == print_nr + 1);
177 cylon_pos = m->jobs_in_progress_iteration % 14;
179 cylon_pos = 14 - cylon_pos;
180 draw_cylon(cylon, sizeof(cylon), 6, cylon_pos);
182 m->jobs_in_progress_iteration++;
184 if (m->n_running_jobs > 1)
185 if (asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs) < 0)
188 format_timespan(time, sizeof(time), now(CLOCK_MONOTONIC) - j->begin_usec, 1*USEC_PER_SEC);
189 if (job_get_timeout(j, &x) > 0)
190 format_timespan(limit, sizeof(limit), x - j->begin_usec, 1*USEC_PER_SEC);
192 manager_status_printf(m, true, cylon,
193 "%sA %s job is running for %s (%s / %s)",
195 job_type_to_string(j->type),
196 unit_description(j->unit),
201 static int manager_watch_idle_pipe(Manager *m) {
206 if (m->idle_pipe_event_source)
209 if (m->idle_pipe[2] < 0)
212 r = sd_event_add_io(m->event, m->idle_pipe[2], EPOLLIN, manager_dispatch_idle_pipe_fd, m, &m->idle_pipe_event_source);
214 log_error("Failed to watch idle pipe: %s", strerror(-r));
221 static void manager_close_idle_pipe(Manager *m) {
224 close_pipe(m->idle_pipe);
225 close_pipe(m->idle_pipe + 2);
228 static int manager_setup_time_change(Manager *m) {
231 /* We only care for the cancellation event, hence we set the
232 * timeout to the latest possible value. */
233 struct itimerspec its = {
234 .it_value.tv_sec = TIME_T_MAX,
238 assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX));
240 /* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever
241 * CLOCK_REALTIME makes a jump relative to CLOCK_MONOTONIC */
243 m->time_change_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC);
244 if (m->time_change_fd < 0) {
245 log_error("Failed to create timerfd: %m");
249 if (timerfd_settime(m->time_change_fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) < 0) {
250 log_debug("Failed to set up TFD_TIMER_CANCEL_ON_SET, ignoring: %m");
251 close_nointr_nofail(m->time_change_fd);
252 m->time_change_fd = -1;
256 r = sd_event_add_io(m->event, m->time_change_fd, EPOLLIN, manager_dispatch_time_change_fd, m, &m->time_change_event_source);
258 log_error("Failed to create time change event source: %s", strerror(-r));
262 log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd.");
267 static int enable_special_signals(Manager *m) {
268 _cleanup_close_ int fd = -1;
272 /* Enable that we get SIGINT on control-alt-del. In containers
273 * this will fail with EPERM (older) or EINVAL (newer), so
275 if (reboot(RB_DISABLE_CAD) < 0 && errno != EPERM && errno != EINVAL)
276 log_warning("Failed to enable ctrl-alt-del handling: %m");
278 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
280 /* Support systems without virtual console */
282 log_warning("Failed to open /dev/tty0: %m");
284 /* Enable that we get SIGWINCH on kbrequest */
285 if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
286 log_warning("Failed to enable kbrequest handling: %m");
292 static int manager_setup_signals(Manager *m) {
293 struct sigaction sa = {
294 .sa_handler = SIG_DFL,
295 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
302 /* We are not interested in SIGSTOP and friends. */
303 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
305 assert_se(sigemptyset(&mask) == 0);
307 sigset_add_many(&mask,
308 SIGCHLD, /* Child died */
309 SIGTERM, /* Reexecute daemon */
310 SIGHUP, /* Reload configuration */
311 SIGUSR1, /* systemd/upstart: reconnect to D-Bus */
312 SIGUSR2, /* systemd: dump status */
313 SIGINT, /* Kernel sends us this on control-alt-del */
314 SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */
315 SIGPWR, /* Some kernel drivers and upsd send us this on power failure */
316 SIGRTMIN+0, /* systemd: start default.target */
317 SIGRTMIN+1, /* systemd: isolate rescue.target */
318 SIGRTMIN+2, /* systemd: isolate emergency.target */
319 SIGRTMIN+3, /* systemd: start halt.target */
320 SIGRTMIN+4, /* systemd: start poweroff.target */
321 SIGRTMIN+5, /* systemd: start reboot.target */
322 SIGRTMIN+6, /* systemd: start kexec.target */
323 SIGRTMIN+13, /* systemd: Immediate halt */
324 SIGRTMIN+14, /* systemd: Immediate poweroff */
325 SIGRTMIN+15, /* systemd: Immediate reboot */
326 SIGRTMIN+16, /* systemd: Immediate kexec */
327 SIGRTMIN+20, /* systemd: enable status messages */
328 SIGRTMIN+21, /* systemd: disable status messages */
329 SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */
330 SIGRTMIN+23, /* systemd: set log level to LOG_INFO */
331 SIGRTMIN+24, /* systemd: Immediate exit (--user only) */
332 SIGRTMIN+26, /* systemd: set log target to journal-or-kmsg */
333 SIGRTMIN+27, /* systemd: set log target to console */
334 SIGRTMIN+28, /* systemd: set log target to kmsg */
335 SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg */
337 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
339 m->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
340 if (m->signal_fd < 0)
343 r = sd_event_add_io(m->event, m->signal_fd, EPOLLIN, manager_dispatch_signal_fd, m, &m->signal_event_source);
347 /* Process signals a bit earlier than the rest of things, but
348 * later that notify_fd processing, so that the notify
349 * processing can still figure out to which process/service a
350 * message belongs, before we reap the process. */
351 r = sd_event_source_set_priority(m->signal_event_source, -5);
355 if (m->running_as == SYSTEMD_SYSTEM)
356 return enable_special_signals(m);
361 static void manager_clean_environment(Manager *m) {
364 /* Let's remove some environment variables that we
365 * need ourselves to communicate with our clients */
378 static int manager_default_environment(Manager *m) {
381 if (m->running_as == SYSTEMD_SYSTEM) {
382 /* The system manager always starts with a clean
383 * environment for its children. It does not import
384 * the kernel or the parents exported variables.
386 * The initial passed environ is untouched to keep
387 * /proc/self/environ valid; it is used for tagging
388 * the init process inside containers. */
389 m->environment = strv_new("PATH=" DEFAULT_PATH,
392 /* Import locale variables LC_*= from configuration */
393 locale_setup(&m->environment);
395 /* The user manager passes its own environment
396 * along to its children. */
397 m->environment = strv_copy(environ);
403 manager_clean_environment(m);
404 strv_sort(m->environment);
409 int manager_new(SystemdRunningAs running_as, Manager **_m) {
414 assert(running_as >= 0);
415 assert(running_as < _SYSTEMD_RUNNING_AS_MAX);
417 m = new0(Manager, 1);
422 if (detect_container(NULL) <= 0)
423 boot_timestamps(&m->userspace_timestamp, &m->firmware_timestamp, &m->loader_timestamp);
426 m->running_as = running_as;
427 m->exit_code = _MANAGER_EXIT_CODE_INVALID;
429 m->idle_pipe[0] = m->idle_pipe[1] = m->idle_pipe[2] = m->idle_pipe[3] = -1;
431 m->pin_cgroupfs_fd = m->notify_fd = m->signal_fd = m->time_change_fd = m->dev_autofs_fd = m->private_listen_fd = m->kdbus_fd = -1;
432 m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
434 r = manager_default_environment(m);
438 r = hashmap_ensure_allocated(&m->units, string_hash_func, string_compare_func);
442 r = hashmap_ensure_allocated(&m->jobs, trivial_hash_func, trivial_compare_func);
446 r = hashmap_ensure_allocated(&m->cgroup_unit, string_hash_func, string_compare_func);
450 r = hashmap_ensure_allocated(&m->watch_bus, string_hash_func, string_compare_func);
454 r = sd_event_default(&m->event);
458 r = sd_event_add_defer(m->event, manager_dispatch_run_queue, m, &m->run_queue_event_source);
462 r = sd_event_source_set_priority(m->run_queue_event_source, SD_EVENT_PRIORITY_IDLE);
466 r = sd_event_source_set_enabled(m->run_queue_event_source, SD_EVENT_OFF);
470 r = manager_setup_signals(m);
474 r = manager_setup_cgroup(m);
478 r = manager_setup_time_change(m);
482 m->udev = udev_new();
488 /* Note that we set up neither kdbus, nor the notify fd
489 * here. We do that after deserialization, since they might
490 * have gotten serialized across the reexec. */
492 m->taint_usr = dir_is_empty("/usr") > 0;
502 static int manager_setup_notify(Manager *m) {
505 struct sockaddr_un un;
507 .sa.sa_family = AF_UNIX,
511 if (m->notify_fd < 0) {
512 _cleanup_close_ int fd = -1;
514 /* First free all secondary fields */
515 free(m->notify_socket);
516 m->notify_socket = NULL;
517 m->notify_event_source = sd_event_source_unref(m->notify_event_source);
519 fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
521 log_error("Failed to allocate notification socket: %m");
525 if (getpid() != 1 || detect_container(NULL) > 0)
526 snprintf(sa.un.sun_path, sizeof(sa.un.sun_path), NOTIFY_SOCKET "/%" PRIx64, random_u64());
528 strncpy(sa.un.sun_path, NOTIFY_SOCKET, sizeof(sa.un.sun_path));
529 sa.un.sun_path[0] = 0;
531 r = bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
533 log_error("bind() failed: %m");
537 r = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
539 log_error("SO_PASSCRED failed: %m");
543 sa.un.sun_path[0] = '@';
544 m->notify_socket = strdup(sa.un.sun_path);
545 if (!m->notify_socket)
551 log_debug("Using notification socket %s", m->notify_socket);
554 if (!m->notify_event_source) {
555 r = sd_event_add_io(m->event, m->notify_fd, EPOLLIN, manager_dispatch_notify_fd, m, &m->notify_event_source);
557 log_error("Failed to allocate notify event source: %s", strerror(-r));
561 /* Process signals a bit earlier than SIGCHLD, so that we can
562 * still identify to which service an exit message belongs */
563 r = sd_event_source_set_priority(m->notify_event_source, -7);
565 log_error("Failed to set priority of notify event source: %s", strerror(-r));
573 static int manager_setup_kdbus(Manager *m) {
575 _cleanup_free_ char *p = NULL;
581 if (m->kdbus_fd >= 0)
584 m->kdbus_fd = bus_kernel_create_bus(m->running_as == SYSTEMD_SYSTEM ? "system" : "user", m->running_as == SYSTEMD_SYSTEM, &p);
585 if (m->kdbus_fd < 0) {
586 log_debug("Failed to set up kdbus: %s", strerror(-m->kdbus_fd));
590 log_debug("Successfully set up kdbus on %s", p);
592 /* Create the namespace directory here, so that the contents
593 * of that directory is not visible to non-root users. This is
594 * necessary to ensure that users cannot get access to busses
595 * of virtualized users when no UID namespacing is used. */
596 if (m->running_as == SYSTEMD_SYSTEM)
597 mkdir_p_label("/dev/kdbus/domain", 0700);
603 static int manager_connect_bus(Manager *m, bool reexecuting) {
604 bool try_bus_connect;
611 (m->running_as == SYSTEMD_USER && getenv("DBUS_SESSION_BUS_ADDRESS"));
613 /* Try to connect to the busses, if possible. */
614 return bus_init(m, try_bus_connect);
617 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
623 while ((u = m->cleanup_queue)) {
624 assert(u->in_cleanup_queue);
634 GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */
635 GC_OFFSET_UNSURE, /* No clue */
636 GC_OFFSET_GOOD, /* We still need this unit */
637 GC_OFFSET_BAD, /* We don't need this unit anymore */
641 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
648 if (u->gc_marker == gc_marker + GC_OFFSET_GOOD ||
649 u->gc_marker == gc_marker + GC_OFFSET_BAD ||
650 u->gc_marker == gc_marker + GC_OFFSET_IN_PATH)
653 if (u->in_cleanup_queue)
656 if (unit_check_gc(u))
659 u->gc_marker = gc_marker + GC_OFFSET_IN_PATH;
663 SET_FOREACH(other, u->dependencies[UNIT_REFERENCED_BY], i) {
664 unit_gc_sweep(other, gc_marker);
666 if (other->gc_marker == gc_marker + GC_OFFSET_GOOD)
669 if (other->gc_marker != gc_marker + GC_OFFSET_BAD)
676 /* We were unable to find anything out about this entry, so
677 * let's investigate it later */
678 u->gc_marker = gc_marker + GC_OFFSET_UNSURE;
679 unit_add_to_gc_queue(u);
683 /* We definitely know that this one is not useful anymore, so
684 * let's mark it for deletion */
685 u->gc_marker = gc_marker + GC_OFFSET_BAD;
686 unit_add_to_cleanup_queue(u);
690 u->gc_marker = gc_marker + GC_OFFSET_GOOD;
693 static unsigned manager_dispatch_gc_queue(Manager *m) {
700 /* log_debug("Running GC..."); */
702 m->gc_marker += _GC_OFFSET_MAX;
703 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
706 gc_marker = m->gc_marker;
708 while ((u = m->gc_queue)) {
709 assert(u->in_gc_queue);
711 unit_gc_sweep(u, gc_marker);
713 LIST_REMOVE(gc_queue, m->gc_queue, u);
714 u->in_gc_queue = false;
718 if (u->gc_marker == gc_marker + GC_OFFSET_BAD ||
719 u->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
720 log_debug_unit(u->id, "Collecting %s", u->id);
721 u->gc_marker = gc_marker + GC_OFFSET_BAD;
722 unit_add_to_cleanup_queue(u);
726 m->n_in_gc_queue = 0;
731 static void manager_clear_jobs_and_units(Manager *m) {
736 while ((u = hashmap_first(m->units)))
739 manager_dispatch_cleanup_queue(m);
741 assert(!m->load_queue);
742 assert(!m->run_queue);
743 assert(!m->dbus_unit_queue);
744 assert(!m->dbus_job_queue);
745 assert(!m->cleanup_queue);
746 assert(!m->gc_queue);
748 assert(hashmap_isempty(m->jobs));
749 assert(hashmap_isempty(m->units));
752 m->n_running_jobs = 0;
755 void manager_free(Manager *m) {
761 manager_clear_jobs_and_units(m);
763 for (c = 0; c < _UNIT_TYPE_MAX; c++)
764 if (unit_vtable[c]->shutdown)
765 unit_vtable[c]->shutdown(m);
767 /* If we reexecute ourselves, we keep the root cgroup
769 manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);
771 manager_undo_generators(m);
775 hashmap_free(m->units);
776 hashmap_free(m->jobs);
777 hashmap_free(m->watch_pids1);
778 hashmap_free(m->watch_pids2);
779 hashmap_free(m->watch_bus);
781 sd_event_source_unref(m->signal_event_source);
782 sd_event_source_unref(m->notify_event_source);
783 sd_event_source_unref(m->time_change_event_source);
784 sd_event_source_unref(m->jobs_in_progress_event_source);
785 sd_event_source_unref(m->idle_pipe_event_source);
786 sd_event_source_unref(m->run_queue_event_source);
788 if (m->signal_fd >= 0)
789 close_nointr_nofail(m->signal_fd);
790 if (m->notify_fd >= 0)
791 close_nointr_nofail(m->notify_fd);
792 if (m->time_change_fd >= 0)
793 close_nointr_nofail(m->time_change_fd);
794 if (m->kdbus_fd >= 0)
795 close_nointr_nofail(m->kdbus_fd);
797 manager_close_idle_pipe(m);
800 sd_event_unref(m->event);
802 free(m->notify_socket);
804 lookup_paths_free(&m->lookup_paths);
805 strv_free(m->environment);
807 hashmap_free(m->cgroup_unit);
808 set_free_free(m->unit_path_cache);
810 free(m->switch_root);
811 free(m->switch_root_init);
813 for (i = 0; i < RLIMIT_NLIMITS; i++)
816 assert(hashmap_isempty(m->units_requiring_mounts_for));
817 hashmap_free(m->units_requiring_mounts_for);
822 int manager_enumerate(Manager *m) {
828 /* Let's ask every type to load all units from disk/kernel
829 * that it might know */
830 for (c = 0; c < _UNIT_TYPE_MAX; c++)
831 if (unit_vtable[c]->enumerate) {
832 q = unit_vtable[c]->enumerate(m);
837 manager_dispatch_load_queue(m);
841 static int manager_coldplug(Manager *m) {
849 /* Then, let's set up their initial state. */
850 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
856 if ((q = unit_coldplug(u)) < 0)
863 static void manager_build_unit_path_cache(Manager *m) {
865 _cleanup_free_ DIR *d = NULL;
870 set_free_free(m->unit_path_cache);
872 m->unit_path_cache = set_new(string_hash_func, string_compare_func);
873 if (!m->unit_path_cache) {
874 log_error("Failed to allocate unit path cache.");
878 /* This simply builds a list of files we know exist, so that
879 * we don't always have to go to disk */
881 STRV_FOREACH(i, m->lookup_paths.unit_path) {
887 log_error("Failed to open directory %s: %m", *i);
891 while ((de = readdir(d))) {
894 if (ignore_file(de->d_name))
897 p = strjoin(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);
903 r = set_consume(m->unit_path_cache, p);
915 log_error("Failed to build unit path cache: %s", strerror(-r));
917 set_free_free(m->unit_path_cache);
918 m->unit_path_cache = NULL;
922 static int manager_distribute_fds(Manager *m, FDSet *fds) {
929 HASHMAP_FOREACH(u, m->units, i) {
931 if (fdset_size(fds) <= 0)
934 if (UNIT_VTABLE(u)->distribute_fds) {
935 r = UNIT_VTABLE(u)->distribute_fds(u, fds);
944 int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
949 dual_timestamp_get(&m->generators_start_timestamp);
950 manager_run_generators(m);
951 dual_timestamp_get(&m->generators_finish_timestamp);
953 r = lookup_paths_init(
954 &m->lookup_paths, m->running_as, true,
955 m->generator_unit_path,
956 m->generator_unit_path_early,
957 m->generator_unit_path_late);
961 manager_build_unit_path_cache(m);
963 /* If we will deserialize make sure that during enumeration
964 * this is already known, so we increase the counter here
969 /* First, enumerate what we can from all config files */
970 dual_timestamp_get(&m->units_load_start_timestamp);
971 r = manager_enumerate(m);
972 dual_timestamp_get(&m->units_load_finish_timestamp);
974 /* Second, deserialize if there is something to deserialize */
976 q = manager_deserialize(m, serialization, fds);
981 /* Any fds left? Find some unit which wants them. This is
982 * useful to allow container managers to pass some file
983 * descriptors to us pre-initialized. This enables
984 * socket-based activation of entire containers. */
985 if (fdset_size(fds) > 0) {
986 q = manager_distribute_fds(m, fds);
991 /* We might have deserialized the notify fd, but if we didn't
992 * then let's create the bus now */
993 manager_setup_notify(m);
995 /* We might have deserialized the kdbus control fd, but if we
996 * didn't, then let's create the bus now. */
997 manager_setup_kdbus(m);
998 manager_connect_bus(m, !!serialization);
1000 /* Third, fire things up! */
1001 q = manager_coldplug(m);
1005 if (serialization) {
1006 assert(m->n_reloading > 0);
1009 /* Let's wait for the UnitNew/JobNew messages being
1010 * sent, before we notify that the reload is
1012 m->send_reloading_done = true;
1018 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, sd_bus_error *e, Job **_ret) {
1023 assert(type < _JOB_TYPE_MAX);
1025 assert(mode < _JOB_MODE_MAX);
1027 if (mode == JOB_ISOLATE && type != JOB_START) {
1028 sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Isolate is only valid for start.");
1032 if (mode == JOB_ISOLATE && !unit->allow_isolate) {
1033 sd_bus_error_setf(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
1037 log_debug_unit(unit->id,
1038 "Trying to enqueue job %s/%s/%s", unit->id,
1039 job_type_to_string(type), job_mode_to_string(mode));
1041 job_type_collapse(&type, unit);
1043 tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY);
1047 r = transaction_add_job_and_dependencies(tr, type, unit, NULL, true, override, false,
1048 mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
1049 mode == JOB_IGNORE_DEPENDENCIES, e);
1053 if (mode == JOB_ISOLATE) {
1054 r = transaction_add_isolate_jobs(tr, m);
1059 r = transaction_activate(tr, m, mode, e);
1063 log_debug_unit(unit->id,
1064 "Enqueued job %s/%s as %u", unit->id,
1065 job_type_to_string(type), (unsigned) tr->anchor_job->id);
1068 *_ret = tr->anchor_job;
1070 transaction_free(tr);
1074 transaction_abort(tr);
1075 transaction_free(tr);
1079 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, sd_bus_error *e, Job **_ret) {
1084 assert(type < _JOB_TYPE_MAX);
1086 assert(mode < _JOB_MODE_MAX);
1088 r = manager_load_unit(m, name, NULL, NULL, &unit);
1092 return manager_add_job(m, type, unit, mode, override, e, _ret);
1095 Job *manager_get_job(Manager *m, uint32_t id) {
1098 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1101 Unit *manager_get_unit(Manager *m, const char *name) {
1105 return hashmap_get(m->units, name);
1108 unsigned manager_dispatch_load_queue(Manager *m) {
1114 /* Make sure we are not run recursively */
1115 if (m->dispatching_load_queue)
1118 m->dispatching_load_queue = true;
1120 /* Dispatches the load queue. Takes a unit from the queue and
1121 * tries to load its data until the queue is empty */
1123 while ((u = m->load_queue)) {
1124 assert(u->in_load_queue);
1130 m->dispatching_load_queue = false;
1134 int manager_load_unit_prepare(
1146 assert(name || path);
1148 /* This will prepare the unit for loading, but not actually
1149 * load anything from disk. */
1151 if (path && !is_path(path))
1152 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not absolute.", path);
1155 name = basename(path);
1157 t = unit_name_to_type(name);
1159 if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, TEMPLATE_INVALID))
1160 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is not valid.", name);
1162 ret = manager_get_unit(m, name);
1168 ret = unit_new(m, unit_vtable[t]->object_size);
1173 ret->fragment_path = strdup(path);
1174 if (!ret->fragment_path) {
1180 r = unit_add_name(ret, name);
1186 unit_add_to_load_queue(ret);
1187 unit_add_to_dbus_queue(ret);
1188 unit_add_to_gc_queue(ret);
1196 int manager_load_unit(
1207 /* This will load the service information files, but not actually
1208 * start any services or anything. */
1210 r = manager_load_unit_prepare(m, name, path, e, _ret);
1214 manager_dispatch_load_queue(m);
1217 *_ret = unit_follow_merge(*_ret);
1222 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {
1229 HASHMAP_FOREACH(j, s->jobs, i)
1230 job_dump(j, f, prefix);
1233 void manager_dump_units(Manager *s, FILE *f, const char *prefix) {
1241 HASHMAP_FOREACH_KEY(u, t, s->units, i)
1243 unit_dump(u, f, prefix);
1246 void manager_clear_jobs(Manager *m) {
1251 while ((j = hashmap_first(m->jobs)))
1252 /* No need to recurse. We're cancelling all jobs. */
1253 job_finish_and_invalidate(j, JOB_CANCELED, false);
1256 static int manager_dispatch_run_queue(sd_event_source *source, void *userdata) {
1257 Manager *m = userdata;
1263 while ((j = m->run_queue)) {
1264 assert(j->installed);
1265 assert(j->in_run_queue);
1267 job_run_and_invalidate(j);
1270 if (m->n_running_jobs > 0)
1271 manager_watch_jobs_in_progress(m);
1273 if (m->n_on_console > 0)
1274 manager_watch_idle_pipe(m);
1279 static unsigned manager_dispatch_dbus_queue(Manager *m) {
1286 if (m->dispatching_dbus_queue)
1289 m->dispatching_dbus_queue = true;
1291 while ((u = m->dbus_unit_queue)) {
1292 assert(u->in_dbus_queue);
1294 bus_unit_send_change_signal(u);
1298 while ((j = m->dbus_job_queue)) {
1299 assert(j->in_dbus_queue);
1301 bus_job_send_change_signal(j);
1305 m->dispatching_dbus_queue = false;
1307 if (m->send_reloading_done) {
1308 m->send_reloading_done = false;
1310 bus_manager_send_reloading(m, false);
1313 if (m->queued_message)
1314 bus_send_queued_message(m);
1319 static void manager_invoke_notify_message(Manager *m, Unit *u, pid_t pid, char *buf, size_t n) {
1320 _cleanup_strv_free_ char **tags = NULL;
1327 tags = strv_split(buf, "\n\r");
1333 log_debug_unit(u->id, "Got notification message for unit %s", u->id);
1335 if (UNIT_VTABLE(u)->notify_message)
1336 UNIT_VTABLE(u)->notify_message(u, pid, tags);
1339 static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1340 Manager *m = userdata;
1344 assert(m->notify_fd == fd);
1346 if (revents != EPOLLIN) {
1347 log_warning("Got unexpected poll event for notify fd.");
1353 struct iovec iovec = {
1355 .iov_len = sizeof(buf)-1,
1360 struct cmsghdr cmsghdr;
1361 uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
1364 struct msghdr msghdr = {
1367 .msg_control = &control,
1368 .msg_controllen = sizeof(control),
1370 struct ucred *ucred;
1373 n = recvmsg(m->notify_fd, &msghdr, MSG_DONTWAIT);
1378 if (errno == EAGAIN || errno == EINTR)
1384 if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||
1385 control.cmsghdr.cmsg_level != SOL_SOCKET ||
1386 control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||
1387 control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
1388 log_warning("Received notify message without credentials. Ignoring.");
1392 ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
1394 assert((size_t) n < sizeof(buf));
1397 u = manager_get_unit_by_pid(m, ucred->pid);
1399 manager_invoke_notify_message(m, u, ucred->pid, buf, n);
1403 u = hashmap_get(m->watch_pids1, LONG_TO_PTR(ucred->pid));
1405 manager_invoke_notify_message(m, u, ucred->pid, buf, n);
1409 u = hashmap_get(m->watch_pids2, LONG_TO_PTR(ucred->pid));
1411 manager_invoke_notify_message(m, u, ucred->pid, buf, n);
1416 log_warning("Cannot find unit for notify message of PID "PID_FMT".", ucred->pid);
1422 static void invoke_sigchld_event(Manager *m, Unit *u, siginfo_t *si) {
1427 log_debug_unit(u->id, "Child "PID_FMT" belongs to %s", si->si_pid, u->id);
1429 unit_unwatch_pid(u, si->si_pid);
1430 UNIT_VTABLE(u)->sigchld_event(u, si->si_pid, si->si_code, si->si_status);
1433 static int manager_dispatch_sigchld(Manager *m) {
1439 /* First we call waitd() for a PID and do not reap the
1440 * zombie. That way we can still access /proc/$PID for
1441 * it while it is a zombie. */
1442 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
1444 if (errno == ECHILD)
1456 if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
1457 _cleanup_free_ char *name = NULL;
1460 get_process_comm(si.si_pid, &name);
1462 log_debug("Child "PID_FMT" (%s) died (code=%s, status=%i/%s)",
1463 si.si_pid, strna(name),
1464 sigchld_code_to_string(si.si_code),
1466 strna(si.si_code == CLD_EXITED
1467 ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)
1468 : signal_to_string(si.si_status)));
1470 /* And now figure out the unit this belongs
1471 * to, it might be multiple... */
1472 u = manager_get_unit_by_pid(m, si.si_pid);
1474 invoke_sigchld_event(m, u, &si);
1475 u = hashmap_get(m->watch_pids1, LONG_TO_PTR(si.si_pid));
1477 invoke_sigchld_event(m, u, &si);
1478 u = hashmap_get(m->watch_pids2, LONG_TO_PTR(si.si_pid));
1480 invoke_sigchld_event(m, u, &si);
1483 /* And now, we actually reap the zombie. */
1484 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
1495 static int manager_start_target(Manager *m, const char *name, JobMode mode) {
1496 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1499 log_debug_unit(name, "Activating special unit %s", name);
1501 r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL);
1503 log_error_unit(name, "Failed to enqueue %s job: %s", name, bus_error_message(&error, r));
1508 static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1509 Manager *m = userdata;
1511 struct signalfd_siginfo sfsi;
1512 bool sigchld = false;
1515 assert(m->signal_fd == fd);
1517 if (revents != EPOLLIN) {
1518 log_warning("Got unexpected events from signal file descriptor.");
1523 n = read(m->signal_fd, &sfsi, sizeof(sfsi));
1524 if (n != sizeof(sfsi)) {
1529 if (errno == EINTR || errno == EAGAIN)
1535 log_received_signal(sfsi.ssi_signo == SIGCHLD ||
1536 (sfsi.ssi_signo == SIGTERM && m->running_as == SYSTEMD_USER)
1537 ? LOG_DEBUG : LOG_INFO,
1540 switch (sfsi.ssi_signo) {
1547 if (m->running_as == SYSTEMD_SYSTEM) {
1548 /* This is for compatibility with the
1549 * original sysvinit */
1550 m->exit_code = MANAGER_REEXECUTE;
1557 if (m->running_as == SYSTEMD_SYSTEM) {
1558 manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE_IRREVERSIBLY);
1562 /* Run the exit target if there is one, if not, just exit. */
1563 if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) {
1564 m->exit_code = MANAGER_EXIT;
1571 if (m->running_as == SYSTEMD_SYSTEM)
1572 manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
1574 /* This is a nop on non-init */
1578 if (m->running_as == SYSTEMD_SYSTEM)
1579 manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);
1581 /* This is a nop on non-init */
1587 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
1589 if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
1590 log_info("Trying to reconnect to bus...");
1594 if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
1595 log_info("Loading D-Bus service...");
1596 manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
1603 _cleanup_free_ char *dump = NULL;
1604 _cleanup_fclose_ FILE *f = NULL;
1607 f = open_memstream(&dump, &size);
1609 log_warning("Failed to allocate memory stream.");
1613 manager_dump_units(m, f, "\t");
1614 manager_dump_jobs(m, f, "\t");
1617 log_warning("Failed to write status stream");
1621 log_dump(LOG_INFO, dump);
1626 m->exit_code = MANAGER_RELOAD;
1631 /* Starting SIGRTMIN+0 */
1632 static const char * const target_table[] = {
1633 [0] = SPECIAL_DEFAULT_TARGET,
1634 [1] = SPECIAL_RESCUE_TARGET,
1635 [2] = SPECIAL_EMERGENCY_TARGET,
1636 [3] = SPECIAL_HALT_TARGET,
1637 [4] = SPECIAL_POWEROFF_TARGET,
1638 [5] = SPECIAL_REBOOT_TARGET,
1639 [6] = SPECIAL_KEXEC_TARGET
1642 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
1643 static const ManagerExitCode code_table[] = {
1645 [1] = MANAGER_POWEROFF,
1646 [2] = MANAGER_REBOOT,
1650 if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&
1651 (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {
1652 int idx = (int) sfsi.ssi_signo - SIGRTMIN;
1653 manager_start_target(m, target_table[idx],
1654 (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE);
1658 if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
1659 (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) {
1660 m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13];
1664 switch (sfsi.ssi_signo - SIGRTMIN) {
1667 log_debug("Enabling showing of status.");
1668 manager_set_show_status(m, SHOW_STATUS_YES);
1672 log_debug("Disabling showing of status.");
1673 manager_set_show_status(m, SHOW_STATUS_NO);
1677 log_set_max_level(LOG_DEBUG);
1678 log_notice("Setting log level to debug.");
1682 log_set_max_level(LOG_INFO);
1683 log_notice("Setting log level to info.");
1687 if (m->running_as == SYSTEMD_USER) {
1688 m->exit_code = MANAGER_EXIT;
1692 /* This is a nop on init */
1696 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1697 log_notice("Setting log target to journal-or-kmsg.");
1701 log_set_target(LOG_TARGET_CONSOLE);
1702 log_notice("Setting log target to console.");
1706 log_set_target(LOG_TARGET_KMSG);
1707 log_notice("Setting log target to kmsg.");
1711 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1712 log_notice("Setting log target to syslog-or-kmsg.");
1716 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
1723 manager_dispatch_sigchld(m);
1728 static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1729 Manager *m = userdata;
1734 assert(m->time_change_fd == fd);
1736 log_struct(LOG_INFO,
1737 MESSAGE_ID(SD_MESSAGE_TIME_CHANGE),
1738 "MESSAGE=Time has been changed",
1741 /* Restart the watch */
1742 m->time_change_event_source = sd_event_source_unref(m->time_change_event_source);
1744 close_nointr_nofail(m->time_change_fd);
1745 m->time_change_fd = -1;
1747 manager_setup_time_change(m);
1749 HASHMAP_FOREACH(u, m->units, i)
1750 if (UNIT_VTABLE(u)->time_change)
1751 UNIT_VTABLE(u)->time_change(u);
1756 static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1757 Manager *m = userdata;
1760 assert(m->idle_pipe[2] == fd);
1762 m->no_console_output = m->n_on_console > 0;
1764 m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
1765 manager_close_idle_pipe(m);
1770 static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata) {
1771 Manager *m = userdata;
1778 manager_print_jobs_in_progress(m);
1780 next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_PERIOD_USEC;
1781 r = sd_event_source_set_time(source, next);
1785 return sd_event_source_set_enabled(source, SD_EVENT_ONESHOT);
1788 int manager_loop(Manager *m) {
1791 RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);
1794 m->exit_code = MANAGER_RUNNING;
1796 /* Release the path cache */
1797 set_free_free(m->unit_path_cache);
1798 m->unit_path_cache = NULL;
1800 manager_check_finished(m);
1802 /* There might still be some zombies hanging around from
1803 * before we were exec()'ed. Let's reap them. */
1804 r = manager_dispatch_sigchld(m);
1808 while (m->exit_code == MANAGER_RUNNING) {
1811 if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM)
1814 if (!ratelimit_test(&rl)) {
1815 /* Yay, something is going seriously wrong, pause a little */
1816 log_warning("Looping too fast. Throttling execution a little.");
1821 if (manager_dispatch_load_queue(m) > 0)
1824 if (manager_dispatch_gc_queue(m) > 0)
1827 if (manager_dispatch_cleanup_queue(m) > 0)
1830 if (manager_dispatch_cgroup_queue(m) > 0)
1833 if (manager_dispatch_dbus_queue(m) > 0)
1836 /* Sleep for half the watchdog time */
1837 if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM) {
1838 wait_usec = m->runtime_watchdog / 2;
1842 wait_usec = (usec_t) -1;
1844 r = sd_event_run(m->event, wait_usec);
1846 log_error("Failed to run event loop: %s", strerror(-r));
1851 return m->exit_code;
1854 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u) {
1855 _cleanup_free_ char *n = NULL;
1863 r = unit_name_from_dbus_path(s, &n);
1867 r = manager_load_unit(m, n, NULL, e, &u);
1876 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
1886 p = startswith(s, "/org/freedesktop/systemd1/job/");
1890 r = safe_atou(p, &id);
1894 j = manager_get_job(m, id);
1903 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {
1906 _cleanup_free_ char *p = NULL;
1909 audit_fd = get_audit_fd();
1913 /* Don't generate audit events if the service was already
1914 * started and we're just deserializing */
1915 if (m->n_reloading > 0)
1918 if (m->running_as != SYSTEMD_SYSTEM)
1921 if (u->type != UNIT_SERVICE)
1924 p = unit_name_to_prefix_and_instance(u->id);
1926 log_error_unit(u->id,
1927 "Failed to allocate unit name for audit message: %s", strerror(ENOMEM));
1931 if (audit_log_user_comm_message(audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) {
1932 if (errno == EPERM) {
1933 /* We aren't allowed to send audit messages?
1934 * Then let's not retry again. */
1937 log_warning("Failed to send audit message: %m");
1943 void manager_send_unit_plymouth(Manager *m, Unit *u) {
1944 union sockaddr_union sa = {
1945 .un.sun_family = AF_UNIX,
1946 .un.sun_path = "\0/org/freedesktop/plymouthd",
1950 _cleanup_free_ char *message = NULL;
1951 _cleanup_close_ int fd = -1;
1953 /* Don't generate plymouth events if the service was already
1954 * started and we're just deserializing */
1955 if (m->n_reloading > 0)
1958 if (m->running_as != SYSTEMD_SYSTEM)
1961 if (detect_container(NULL) > 0)
1964 if (u->type != UNIT_SERVICE &&
1965 u->type != UNIT_MOUNT &&
1966 u->type != UNIT_SWAP)
1969 /* We set SOCK_NONBLOCK here so that we rather drop the
1970 * message then wait for plymouth */
1971 fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
1973 log_error("socket() failed: %m");
1977 if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
1979 if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED))
1980 log_error("connect() failed: %m");
1984 if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0) {
1990 if (write(fd, message, n + 1) != n + 1)
1991 if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED))
1992 log_error("Failed to write Plymouth message: %m");
1995 void manager_dispatch_bus_name_owner_changed(
1998 const char* old_owner,
1999 const char *new_owner) {
2006 u = hashmap_get(m->watch_bus, name);
2010 UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
2013 int manager_open_serialization(Manager *m, FILE **_f) {
2020 path = m->running_as == SYSTEMD_SYSTEM ? "/run/systemd" : "/tmp";
2021 fd = open_tmpfile(path, O_RDWR|O_CLOEXEC);
2025 log_debug("Serializing state to %s", path);
2027 f = fdopen(fd, "w+");
2029 close_nointr_nofail(fd);
2038 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root) {
2051 fprintf(f, "current-job-id=%i\n", m->current_job_id);
2052 fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr));
2053 fprintf(f, "n-installed-jobs=%u\n", m->n_installed_jobs);
2054 fprintf(f, "n-failed-jobs=%u\n", m->n_failed_jobs);
2056 dual_timestamp_serialize(f, "firmware-timestamp", &m->firmware_timestamp);
2057 dual_timestamp_serialize(f, "loader-timestamp", &m->loader_timestamp);
2058 dual_timestamp_serialize(f, "kernel-timestamp", &m->kernel_timestamp);
2059 dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp);
2062 dual_timestamp_serialize(f, "userspace-timestamp", &m->userspace_timestamp);
2063 dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp);
2064 dual_timestamp_serialize(f, "security-start-timestamp", &m->security_start_timestamp);
2065 dual_timestamp_serialize(f, "security-finish-timestamp", &m->security_finish_timestamp);
2066 dual_timestamp_serialize(f, "generators-start-timestamp", &m->generators_start_timestamp);
2067 dual_timestamp_serialize(f, "generators-finish-timestamp", &m->generators_finish_timestamp);
2068 dual_timestamp_serialize(f, "units-load-start-timestamp", &m->units_load_start_timestamp);
2069 dual_timestamp_serialize(f, "units-load-finish-timestamp", &m->units_load_finish_timestamp);
2072 if (!switching_root) {
2073 STRV_FOREACH(e, m->environment) {
2074 _cleanup_free_ char *ce;
2080 fprintf(f, "env=%s\n", *e);
2084 if (m->notify_fd >= 0) {
2087 copy = fdset_put_dup(fds, m->notify_fd);
2091 fprintf(f, "notify-fd=%i\n", copy);
2092 fprintf(f, "notify-socket=%s\n", m->notify_socket);
2095 if (m->kdbus_fd >= 0) {
2098 copy = fdset_put_dup(fds, m->kdbus_fd);
2102 fprintf(f, "kdbus-fd=%i\n", copy);
2105 bus_serialize(m, f);
2109 HASHMAP_FOREACH_KEY(u, t, m->units, i) {
2113 if (!unit_can_serialize(u))
2120 r = unit_serialize(u, f, fds, !switching_root);
2127 assert(m->n_reloading > 0);
2133 r = bus_fdset_add_all(m, fds);
2140 int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
2146 log_debug("Deserializing state...");
2151 char line[LINE_MAX], *l;
2153 if (!fgets(line, sizeof(line), f)) {
2168 if (startswith(l, "current-job-id=")) {
2171 if (safe_atou32(l+15, &id) < 0)
2172 log_debug("Failed to parse current job id value %s", l+15);
2174 m->current_job_id = MAX(m->current_job_id, id);
2176 } else if (startswith(l, "n-installed-jobs=")) {
2179 if (safe_atou32(l+17, &n) < 0)
2180 log_debug("Failed to parse installed jobs counter %s", l+17);
2182 m->n_installed_jobs += n;
2184 } else if (startswith(l, "n-failed-jobs=")) {
2187 if (safe_atou32(l+14, &n) < 0)
2188 log_debug("Failed to parse failed jobs counter %s", l+14);
2190 m->n_failed_jobs += n;
2192 } else if (startswith(l, "taint-usr=")) {
2195 b = parse_boolean(l+10);
2197 log_debug("Failed to parse taint /usr flag %s", l+10);
2199 m->taint_usr = m->taint_usr || b;
2201 } else if (startswith(l, "firmware-timestamp="))
2202 dual_timestamp_deserialize(l+19, &m->firmware_timestamp);
2203 else if (startswith(l, "loader-timestamp="))
2204 dual_timestamp_deserialize(l+17, &m->loader_timestamp);
2205 else if (startswith(l, "kernel-timestamp="))
2206 dual_timestamp_deserialize(l+17, &m->kernel_timestamp);
2207 else if (startswith(l, "initrd-timestamp="))
2208 dual_timestamp_deserialize(l+17, &m->initrd_timestamp);
2209 else if (startswith(l, "userspace-timestamp="))
2210 dual_timestamp_deserialize(l+20, &m->userspace_timestamp);
2211 else if (startswith(l, "finish-timestamp="))
2212 dual_timestamp_deserialize(l+17, &m->finish_timestamp);
2213 else if (startswith(l, "security-start-timestamp="))
2214 dual_timestamp_deserialize(l+25, &m->security_start_timestamp);
2215 else if (startswith(l, "security-finish-timestamp="))
2216 dual_timestamp_deserialize(l+26, &m->security_finish_timestamp);
2217 else if (startswith(l, "generators-start-timestamp="))
2218 dual_timestamp_deserialize(l+27, &m->generators_start_timestamp);
2219 else if (startswith(l, "generators-finish-timestamp="))
2220 dual_timestamp_deserialize(l+28, &m->generators_finish_timestamp);
2221 else if (startswith(l, "units-load-start-timestamp="))
2222 dual_timestamp_deserialize(l+27, &m->units_load_start_timestamp);
2223 else if (startswith(l, "units-load-finish-timestamp="))
2224 dual_timestamp_deserialize(l+28, &m->units_load_finish_timestamp);
2225 else if (startswith(l, "env=")) {
2226 _cleanup_free_ char *uce = NULL;
2229 uce = cunescape(l+4);
2235 e = strv_env_set(m->environment, uce);
2241 strv_free(m->environment);
2244 } else if (startswith(l, "notify-fd=")) {
2247 if (safe_atoi(l + 10, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2248 log_debug("Failed to parse notify fd: %s", l + 10);
2250 if (m->notify_fd >= 0) {
2251 m->notify_event_source = sd_event_source_unref(m->notify_event_source);
2252 close_nointr_nofail(m->notify_fd);
2255 m->notify_fd = fdset_remove(fds, fd);
2258 } else if (startswith(l, "notify-socket=")) {
2267 free(m->notify_socket);
2268 m->notify_socket = n;
2270 } else if (startswith(l, "kdbus-fd=")) {
2273 if (safe_atoi(l + 9, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2274 log_debug("Failed to parse kdbus fd: %s", l + 9);
2276 if (m->kdbus_fd >= 0)
2277 close_nointr_nofail(m->kdbus_fd);
2279 m->kdbus_fd = fdset_remove(fds, fd);
2282 } else if (bus_deserialize_item(m, l) == 0)
2283 log_debug("Unknown serialization item '%s'", l);
2288 char name[UNIT_NAME_MAX+2];
2291 if (!fgets(name, sizeof(name), f)) {
2302 r = manager_load_unit(m, strstrip(name), NULL, NULL, &u);
2306 r = unit_deserialize(u, f, fds);
2315 assert(m->n_reloading > 0);
2321 int manager_reload(Manager *m) {
2323 _cleanup_fclose_ FILE *f = NULL;
2324 _cleanup_fdset_free_ FDSet *fds = NULL;
2328 r = manager_open_serialization(m, &f);
2333 bus_manager_send_reloading(m, true);
2341 r = manager_serialize(m, f, fds, false);
2347 if (fseeko(f, 0, SEEK_SET) < 0) {
2352 /* From here on there is no way back. */
2353 manager_clear_jobs_and_units(m);
2354 manager_undo_generators(m);
2355 lookup_paths_free(&m->lookup_paths);
2357 /* Find new unit paths */
2358 manager_run_generators(m);
2360 q = lookup_paths_init(
2361 &m->lookup_paths, m->running_as, true,
2362 m->generator_unit_path,
2363 m->generator_unit_path_early,
2364 m->generator_unit_path_late);
2368 manager_build_unit_path_cache(m);
2370 /* First, enumerate what we can from all config files */
2371 q = manager_enumerate(m);
2375 /* Second, deserialize our stored data */
2376 q = manager_deserialize(m, f, fds);
2383 /* Re-register notify_fd as event source */
2384 q = manager_setup_notify(m);
2388 /* Third, fire things up! */
2389 q = manager_coldplug(m);
2393 assert(m->n_reloading > 0);
2396 m->send_reloading_done = true;
2401 static bool manager_is_booting_or_shutting_down(Manager *m) {
2406 /* Is the initial job still around? */
2407 if (manager_get_job(m, m->default_unit_job_id))
2410 /* Is there a job for the shutdown target? */
2411 u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
2418 bool manager_is_reloading_or_reexecuting(Manager *m) {
2421 return m->n_reloading != 0;
2424 void manager_reset_failed(Manager *m) {
2430 HASHMAP_FOREACH(u, m->units, i)
2431 unit_reset_failed(u);
2434 bool manager_unit_inactive_or_pending(Manager *m, const char *name) {
2440 /* Returns true if the unit is inactive or going down */
2441 u = manager_get_unit(m, name);
2445 return unit_inactive_or_pending(u);
2448 void manager_check_finished(Manager *m) {
2449 char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
2450 usec_t firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec;
2454 if (m->n_running_jobs == 0)
2455 m->jobs_in_progress_event_source = sd_event_source_unref(m->jobs_in_progress_event_source);
2457 if (hashmap_size(m->jobs) > 0) {
2458 if (m->jobs_in_progress_event_source) {
2459 uint64_t next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC;
2460 sd_event_source_set_time(m->jobs_in_progress_event_source, next);
2465 manager_flip_auto_status(m, false);
2467 /* Notify Type=idle units that we are done now */
2468 m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
2469 manager_close_idle_pipe(m);
2471 /* Turn off confirm spawn now */
2472 m->confirm_spawn = false;
2474 if (dual_timestamp_is_set(&m->finish_timestamp))
2477 dual_timestamp_get(&m->finish_timestamp);
2479 if (m->running_as == SYSTEMD_SYSTEM && detect_container(NULL) <= 0) {
2481 /* Note that m->kernel_usec.monotonic is always at 0,
2482 * and m->firmware_usec.monotonic and
2483 * m->loader_usec.monotonic should be considered
2484 * negative values. */
2486 firmware_usec = m->firmware_timestamp.monotonic - m->loader_timestamp.monotonic;
2487 loader_usec = m->loader_timestamp.monotonic - m->kernel_timestamp.monotonic;
2488 userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;
2489 total_usec = m->firmware_timestamp.monotonic + m->finish_timestamp.monotonic;
2491 if (dual_timestamp_is_set(&m->initrd_timestamp)) {
2493 kernel_usec = m->initrd_timestamp.monotonic - m->kernel_timestamp.monotonic;
2494 initrd_usec = m->userspace_timestamp.monotonic - m->initrd_timestamp.monotonic;
2496 if (!log_on_console())
2497 log_struct(LOG_INFO,
2498 MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2499 "KERNEL_USEC="USEC_FMT, kernel_usec,
2500 "INITRD_USEC="USEC_FMT, initrd_usec,
2501 "USERSPACE_USEC="USEC_FMT, userspace_usec,
2502 "MESSAGE=Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
2503 format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
2504 format_timespan(initrd, sizeof(initrd), initrd_usec, USEC_PER_MSEC),
2505 format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
2506 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
2509 kernel_usec = m->userspace_timestamp.monotonic - m->kernel_timestamp.monotonic;
2512 if (!log_on_console())
2513 log_struct(LOG_INFO,
2514 MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2515 "KERNEL_USEC="USEC_FMT, kernel_usec,
2516 "USERSPACE_USEC="USEC_FMT, userspace_usec,
2517 "MESSAGE=Startup finished in %s (kernel) + %s (userspace) = %s.",
2518 format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
2519 format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
2520 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
2524 firmware_usec = loader_usec = initrd_usec = kernel_usec = 0;
2525 total_usec = userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;
2527 if (!log_on_console())
2528 log_struct(LOG_INFO,
2529 MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2530 "USERSPACE_USEC="USEC_FMT, userspace_usec,
2531 "MESSAGE=Startup finished in %s.",
2532 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
2536 bus_manager_send_finished(m, firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec);
2539 "READY=1\nSTATUS=Startup finished in %s.",
2540 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC));
2543 static int create_generator_dir(Manager *m, char **generator, const char *name) {
2554 if (m->running_as == SYSTEMD_SYSTEM && getpid() == 1) {
2555 /* systemd --system, not running --test */
2557 p = strappend("/run/systemd/", name);
2561 r = mkdir_p_label(p, 0755);
2563 log_error("Failed to create generator directory %s: %s",
2568 } else if (m->running_as == SYSTEMD_USER) {
2569 const char *s = NULL;
2571 s = getenv("XDG_RUNTIME_DIR");
2574 p = strjoin(s, "/systemd/", name, NULL);
2578 r = mkdir_p_label(p, 0755);
2580 log_error("Failed to create generator directory %s: %s",
2586 /* systemd --system --test */
2588 p = strjoin("/tmp/systemd-", name, ".XXXXXX", NULL);
2593 log_error("Failed to create generator directory %s: %m",
2604 static void trim_generator_dir(Manager *m, char **generator) {
2611 if (rmdir(*generator) >= 0) {
2619 void manager_run_generators(Manager *m) {
2620 _cleanup_closedir_ DIR *d = NULL;
2621 const char *generator_path;
2622 const char *argv[5];
2627 generator_path = m->running_as == SYSTEMD_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH;
2628 d = opendir(generator_path);
2630 if (errno == ENOENT)
2633 log_error("Failed to enumerate generator directory %s: %m",
2638 r = create_generator_dir(m, &m->generator_unit_path, "generator");
2642 r = create_generator_dir(m, &m->generator_unit_path_early, "generator.early");
2646 r = create_generator_dir(m, &m->generator_unit_path_late, "generator.late");
2650 argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
2651 argv[1] = m->generator_unit_path;
2652 argv[2] = m->generator_unit_path_early;
2653 argv[3] = m->generator_unit_path_late;
2656 RUN_WITH_UMASK(0022)
2657 execute_directory(generator_path, d, (char**) argv);
2660 trim_generator_dir(m, &m->generator_unit_path);
2661 trim_generator_dir(m, &m->generator_unit_path_early);
2662 trim_generator_dir(m, &m->generator_unit_path_late);
2665 static void remove_generator_dir(Manager *m, char **generator) {
2672 strv_remove(m->lookup_paths.unit_path, *generator);
2673 rm_rf(*generator, false, true, false);
2679 void manager_undo_generators(Manager *m) {
2682 remove_generator_dir(m, &m->generator_unit_path);
2683 remove_generator_dir(m, &m->generator_unit_path_early);
2684 remove_generator_dir(m, &m->generator_unit_path_late);
2687 int manager_environment_add(Manager *m, char **minus, char **plus) {
2688 char **a = NULL, **b = NULL, **l;
2693 if (!strv_isempty(minus)) {
2694 a = strv_env_delete(l, 1, minus);
2701 if (!strv_isempty(plus)) {
2702 b = strv_env_merge(2, l, plus);
2709 if (m->environment != l)
2710 strv_free(m->environment);
2717 manager_clean_environment(m);
2718 strv_sort(m->environment);
2723 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit) {
2728 for (i = 0; i < RLIMIT_NLIMITS; i++) {
2729 if (!default_rlimit[i])
2732 m->rlimit[i] = newdup(struct rlimit, default_rlimit[i], 1);
2740 void manager_recheck_journal(Manager *m) {
2745 if (m->running_as != SYSTEMD_SYSTEM)
2748 u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET);
2749 if (u && SOCKET(u)->state != SOCKET_RUNNING) {
2750 log_close_journal();
2754 u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE);
2755 if (u && SERVICE(u)->state != SERVICE_RUNNING) {
2756 log_close_journal();
2760 /* Hmm, OK, so the socket is fully up and the service is up
2761 * too, then let's make use of the thing. */
2765 void manager_set_show_status(Manager *m, ShowStatus mode) {
2767 assert(IN_SET(mode, SHOW_STATUS_AUTO, SHOW_STATUS_NO, SHOW_STATUS_YES, SHOW_STATUS_TEMPORARY));
2769 if (m->running_as != SYSTEMD_SYSTEM)
2772 m->show_status = mode;
2775 touch("/run/systemd/show-status");
2777 unlink("/run/systemd/show-status");
2780 static bool manager_get_show_status(Manager *m) {
2783 if (m->running_as != SYSTEMD_SYSTEM)
2786 if (m->no_console_output)
2789 if (m->show_status > 0)
2792 /* If Plymouth is running make sure we show the status, so
2793 * that there's something nice to see when people press Esc */
2795 return plymouth_running();
2798 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) {
2801 if (!manager_get_show_status(m))
2804 /* XXX We should totally drop the check for ephemeral here
2805 * and thus effectively make 'Type=idle' pointless. */
2806 if (ephemeral && m->n_on_console > 0)
2809 if (!manager_is_booting_or_shutting_down(m))
2812 va_start(ap, format);
2813 status_vprintf(status, true, ephemeral, format, ap);
2817 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found) {
2818 _cleanup_free_ char *p = NULL;
2826 p = unit_name_from_path(path, suffix);
2830 found = manager_get_unit(m, p);
2840 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path) {
2841 char p[strlen(path)+1];
2847 path_kill_slashes(p);
2849 return hashmap_get(m->units_requiring_mounts_for, streq(p, "/") ? "" : p);