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time-util: add and use USEC/NSEC_INFINIY
[thirdparty/systemd.git] / src / core / manager.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
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.
12
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.
17
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/>.
20 ***/
21
22 #include <assert.h>
23 #include <errno.h>
24 #include <string.h>
25 #include <signal.h>
26 #include <sys/wait.h>
27 #include <unistd.h>
28 #include <sys/poll.h>
29 #include <sys/reboot.h>
30 #include <sys/ioctl.h>
31 #include <linux/kd.h>
32 #include <termios.h>
33 #include <fcntl.h>
34 #include <sys/types.h>
35 #include <sys/stat.h>
36 #include <dirent.h>
37 #include <sys/timerfd.h>
38
39 #ifdef HAVE_AUDIT
40 #include <libaudit.h>
41 #endif
42
43 #include "sd-daemon.h"
44 #include "sd-id128.h"
45 #include "sd-messages.h"
46
47 #include "manager.h"
48 #include "transaction.h"
49 #include "hashmap.h"
50 #include "macro.h"
51 #include "strv.h"
52 #include "log.h"
53 #include "util.h"
54 #include "mkdir.h"
55 #include "ratelimit.h"
56 #include "locale-setup.h"
57 #include "mount-setup.h"
58 #include "unit-name.h"
59 #include "missing.h"
60 #include "path-lookup.h"
61 #include "special.h"
62 #include "exit-status.h"
63 #include "virt.h"
64 #include "watchdog.h"
65 #include "cgroup-util.h"
66 #include "path-util.h"
67 #include "audit-fd.h"
68 #include "boot-timestamps.h"
69 #include "env-util.h"
70 #include "bus-errors.h"
71 #include "bus-error.h"
72 #include "bus-util.h"
73 #include "dbus.h"
74 #include "dbus-unit.h"
75 #include "dbus-job.h"
76 #include "dbus-manager.h"
77 #include "bus-kernel.h"
78
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)
81
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
86
87 #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
88
89 static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
90 static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
91 static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
92 static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata);
93 static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata);
94 static int manager_dispatch_run_queue(sd_event_source *source, void *userdata);
95
96 static int manager_watch_jobs_in_progress(Manager *m) {
97 usec_t next;
98
99 assert(m);
100
101 if (m->jobs_in_progress_event_source)
102 return 0;
103
104 next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC;
105 return sd_event_add_time(
106 m->event,
107 &m->jobs_in_progress_event_source,
108 CLOCK_MONOTONIC,
109 next, 0,
110 manager_dispatch_jobs_in_progress, m);
111 }
112
113 #define CYLON_BUFFER_EXTRA (2*(sizeof(ANSI_RED_ON)-1) + sizeof(ANSI_HIGHLIGHT_RED_ON)-1 + 2*(sizeof(ANSI_HIGHLIGHT_OFF)-1))
114
115 static void draw_cylon(char buffer[], size_t buflen, unsigned width, unsigned pos) {
116 char *p = buffer;
117
118 assert(buflen >= CYLON_BUFFER_EXTRA + width + 1);
119 assert(pos <= width+1); /* 0 or width+1 mean that the center light is behind the corner */
120
121 if (pos > 1) {
122 if (pos > 2)
123 p = mempset(p, ' ', pos-2);
124 p = stpcpy(p, ANSI_RED_ON);
125 *p++ = '*';
126 }
127
128 if (pos > 0 && pos <= width) {
129 p = stpcpy(p, ANSI_HIGHLIGHT_RED_ON);
130 *p++ = '*';
131 }
132
133 p = stpcpy(p, ANSI_HIGHLIGHT_OFF);
134
135 if (pos < width) {
136 p = stpcpy(p, ANSI_RED_ON);
137 *p++ = '*';
138 if (pos < width-1)
139 p = mempset(p, ' ', width-1-pos);
140 strcpy(p, ANSI_HIGHLIGHT_OFF);
141 }
142 }
143
144 void manager_flip_auto_status(Manager *m, bool enable) {
145 assert(m);
146
147 if (enable) {
148 if (m->show_status == SHOW_STATUS_AUTO)
149 manager_set_show_status(m, SHOW_STATUS_TEMPORARY);
150 } else {
151 if (m->show_status == SHOW_STATUS_TEMPORARY)
152 manager_set_show_status(m, SHOW_STATUS_AUTO);
153 }
154 }
155
156 static void manager_print_jobs_in_progress(Manager *m) {
157 _cleanup_free_ char *job_of_n = NULL;
158 Iterator i;
159 Job *j;
160 unsigned counter = 0, print_nr;
161 char cylon[6 + CYLON_BUFFER_EXTRA + 1];
162 unsigned cylon_pos;
163 char time[FORMAT_TIMESPAN_MAX], limit[FORMAT_TIMESPAN_MAX] = "no limit";
164 uint64_t x;
165
166 assert(m);
167
168 manager_flip_auto_status(m, true);
169
170 print_nr = (m->jobs_in_progress_iteration / JOBS_IN_PROGRESS_PERIOD_DIVISOR) % m->n_running_jobs;
171
172 HASHMAP_FOREACH(j, m->jobs, i)
173 if (j->state == JOB_RUNNING && counter++ == print_nr)
174 break;
175
176 /* m->n_running_jobs must be consistent with the contents of m->jobs,
177 * so the above loop must have succeeded in finding j. */
178 assert(counter == print_nr + 1);
179 assert(j);
180
181 cylon_pos = m->jobs_in_progress_iteration % 14;
182 if (cylon_pos >= 8)
183 cylon_pos = 14 - cylon_pos;
184 draw_cylon(cylon, sizeof(cylon), 6, cylon_pos);
185
186 m->jobs_in_progress_iteration++;
187
188 if (m->n_running_jobs > 1)
189 if (asprintf(&job_of_n, "(%u of %u) ", counter, m->n_running_jobs) < 0)
190 job_of_n = NULL;
191
192 format_timespan(time, sizeof(time), now(CLOCK_MONOTONIC) - j->begin_usec, 1*USEC_PER_SEC);
193 if (job_get_timeout(j, &x) > 0)
194 format_timespan(limit, sizeof(limit), x - j->begin_usec, 1*USEC_PER_SEC);
195
196 manager_status_printf(m, true, cylon,
197 "%sA %s job is running for %s (%s / %s)",
198 strempty(job_of_n),
199 job_type_to_string(j->type),
200 unit_description(j->unit),
201 time, limit);
202
203 }
204
205 static int manager_watch_idle_pipe(Manager *m) {
206 int r;
207
208 assert(m);
209
210 if (m->idle_pipe_event_source)
211 return 0;
212
213 if (m->idle_pipe[2] < 0)
214 return 0;
215
216 r = sd_event_add_io(m->event, &m->idle_pipe_event_source, m->idle_pipe[2], EPOLLIN, manager_dispatch_idle_pipe_fd, m);
217 if (r < 0) {
218 log_error("Failed to watch idle pipe: %s", strerror(-r));
219 return r;
220 }
221
222 return 0;
223 }
224
225 static void manager_close_idle_pipe(Manager *m) {
226 assert(m);
227
228 safe_close_pair(m->idle_pipe);
229 safe_close_pair(m->idle_pipe + 2);
230 }
231
232 static int manager_setup_time_change(Manager *m) {
233 int r;
234
235 /* We only care for the cancellation event, hence we set the
236 * timeout to the latest possible value. */
237 struct itimerspec its = {
238 .it_value.tv_sec = TIME_T_MAX,
239 };
240
241 assert(m);
242 assert_cc(sizeof(time_t) == sizeof(TIME_T_MAX));
243
244 if (m->test_run)
245 return 0;
246
247 /* Uses TFD_TIMER_CANCEL_ON_SET to get notifications whenever
248 * CLOCK_REALTIME makes a jump relative to CLOCK_MONOTONIC */
249
250 m->time_change_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC);
251 if (m->time_change_fd < 0) {
252 log_error("Failed to create timerfd: %m");
253 return -errno;
254 }
255
256 if (timerfd_settime(m->time_change_fd, TFD_TIMER_ABSTIME|TFD_TIMER_CANCEL_ON_SET, &its, NULL) < 0) {
257 log_debug("Failed to set up TFD_TIMER_CANCEL_ON_SET, ignoring: %m");
258 m->time_change_fd = safe_close(m->time_change_fd);
259 return 0;
260 }
261
262 r = sd_event_add_io(m->event, &m->time_change_event_source, m->time_change_fd, EPOLLIN, manager_dispatch_time_change_fd, m);
263 if (r < 0) {
264 log_error("Failed to create time change event source: %s", strerror(-r));
265 return r;
266 }
267
268 log_debug("Set up TFD_TIMER_CANCEL_ON_SET timerfd.");
269
270 return 0;
271 }
272
273 static int enable_special_signals(Manager *m) {
274 _cleanup_close_ int fd = -1;
275
276 assert(m);
277
278 /* Enable that we get SIGINT on control-alt-del. In containers
279 * this will fail with EPERM (older) or EINVAL (newer), so
280 * ignore that. */
281 if (reboot(RB_DISABLE_CAD) < 0 && errno != EPERM && errno != EINVAL)
282 log_warning("Failed to enable ctrl-alt-del handling: %m");
283
284 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
285 if (fd < 0) {
286 /* Support systems without virtual console */
287 if (fd != -ENOENT)
288 log_warning("Failed to open /dev/tty0: %m");
289 } else {
290 /* Enable that we get SIGWINCH on kbrequest */
291 if (ioctl(fd, KDSIGACCEPT, SIGWINCH) < 0)
292 log_warning("Failed to enable kbrequest handling: %m");
293 }
294
295 return 0;
296 }
297
298 static int manager_setup_signals(Manager *m) {
299 struct sigaction sa = {
300 .sa_handler = SIG_DFL,
301 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
302 };
303 sigset_t mask;
304 int r;
305
306 assert(m);
307
308 if (m->test_run)
309 return 0;
310
311 /* We are not interested in SIGSTOP and friends. */
312 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
313
314 assert_se(sigemptyset(&mask) == 0);
315
316 sigset_add_many(&mask,
317 SIGCHLD, /* Child died */
318 SIGTERM, /* Reexecute daemon */
319 SIGHUP, /* Reload configuration */
320 SIGUSR1, /* systemd/upstart: reconnect to D-Bus */
321 SIGUSR2, /* systemd: dump status */
322 SIGINT, /* Kernel sends us this on control-alt-del */
323 SIGWINCH, /* Kernel sends us this on kbrequest (alt-arrowup) */
324 SIGPWR, /* Some kernel drivers and upsd send us this on power failure */
325 SIGRTMIN+0, /* systemd: start default.target */
326 SIGRTMIN+1, /* systemd: isolate rescue.target */
327 SIGRTMIN+2, /* systemd: isolate emergency.target */
328 SIGRTMIN+3, /* systemd: start halt.target */
329 SIGRTMIN+4, /* systemd: start poweroff.target */
330 SIGRTMIN+5, /* systemd: start reboot.target */
331 SIGRTMIN+6, /* systemd: start kexec.target */
332 SIGRTMIN+13, /* systemd: Immediate halt */
333 SIGRTMIN+14, /* systemd: Immediate poweroff */
334 SIGRTMIN+15, /* systemd: Immediate reboot */
335 SIGRTMIN+16, /* systemd: Immediate kexec */
336 SIGRTMIN+20, /* systemd: enable status messages */
337 SIGRTMIN+21, /* systemd: disable status messages */
338 SIGRTMIN+22, /* systemd: set log level to LOG_DEBUG */
339 SIGRTMIN+23, /* systemd: set log level to LOG_INFO */
340 SIGRTMIN+24, /* systemd: Immediate exit (--user only) */
341 SIGRTMIN+26, /* systemd: set log target to journal-or-kmsg */
342 SIGRTMIN+27, /* systemd: set log target to console */
343 SIGRTMIN+28, /* systemd: set log target to kmsg */
344 SIGRTMIN+29, /* systemd: set log target to syslog-or-kmsg */
345 -1);
346 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
347
348 m->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
349 if (m->signal_fd < 0)
350 return -errno;
351
352 r = sd_event_add_io(m->event, &m->signal_event_source, m->signal_fd, EPOLLIN, manager_dispatch_signal_fd, m);
353 if (r < 0)
354 return r;
355
356 /* Process signals a bit earlier than the rest of things, but
357 * later that notify_fd processing, so that the notify
358 * processing can still figure out to which process/service a
359 * message belongs, before we reap the process. */
360 r = sd_event_source_set_priority(m->signal_event_source, -5);
361 if (r < 0)
362 return r;
363
364 if (m->running_as == SYSTEMD_SYSTEM)
365 return enable_special_signals(m);
366
367 return 0;
368 }
369
370 static void manager_clean_environment(Manager *m) {
371 assert(m);
372
373 /* Let's remove some environment variables that we
374 * need ourselves to communicate with our clients */
375 strv_env_unset_many(
376 m->environment,
377 "NOTIFY_SOCKET",
378 "MAINPID",
379 "MANAGERPID",
380 "LISTEN_PID",
381 "LISTEN_FDS",
382 "WATCHDOG_PID",
383 "WATCHDOG_USEC",
384 NULL);
385 }
386
387 static int manager_default_environment(Manager *m) {
388 assert(m);
389
390 if (m->running_as == SYSTEMD_SYSTEM) {
391 /* The system manager always starts with a clean
392 * environment for its children. It does not import
393 * the kernel or the parents exported variables.
394 *
395 * The initial passed environ is untouched to keep
396 * /proc/self/environ valid; it is used for tagging
397 * the init process inside containers. */
398 m->environment = strv_new("PATH=" DEFAULT_PATH,
399 NULL);
400
401 /* Import locale variables LC_*= from configuration */
402 locale_setup(&m->environment);
403 } else {
404 /* The user manager passes its own environment
405 * along to its children. */
406 m->environment = strv_copy(environ);
407 }
408
409 if (!m->environment)
410 return -ENOMEM;
411
412 manager_clean_environment(m);
413 strv_sort(m->environment);
414
415 return 0;
416 }
417
418 int manager_new(SystemdRunningAs running_as, bool test_run, Manager **_m) {
419 Manager *m;
420 int r;
421
422 assert(_m);
423 assert(running_as >= 0);
424 assert(running_as < _SYSTEMD_RUNNING_AS_MAX);
425
426 m = new0(Manager, 1);
427 if (!m)
428 return -ENOMEM;
429
430 #ifdef ENABLE_EFI
431 if (running_as == SYSTEMD_SYSTEM && detect_container(NULL) <= 0)
432 boot_timestamps(&m->userspace_timestamp, &m->firmware_timestamp, &m->loader_timestamp);
433 #endif
434
435 m->running_as = running_as;
436 m->exit_code = _MANAGER_EXIT_CODE_INVALID;
437 m->default_timer_accuracy_usec = USEC_PER_MINUTE;
438
439 m->idle_pipe[0] = m->idle_pipe[1] = m->idle_pipe[2] = m->idle_pipe[3] = -1;
440
441 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;
442 m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
443
444 m->test_run = test_run;
445
446 r = manager_default_environment(m);
447 if (r < 0)
448 goto fail;
449
450 r = hashmap_ensure_allocated(&m->units, string_hash_func, string_compare_func);
451 if (r < 0)
452 goto fail;
453
454 r = hashmap_ensure_allocated(&m->jobs, trivial_hash_func, trivial_compare_func);
455 if (r < 0)
456 goto fail;
457
458 r = hashmap_ensure_allocated(&m->cgroup_unit, string_hash_func, string_compare_func);
459 if (r < 0)
460 goto fail;
461
462 r = hashmap_ensure_allocated(&m->watch_bus, string_hash_func, string_compare_func);
463 if (r < 0)
464 goto fail;
465
466 r = set_ensure_allocated(&m->startup_units, trivial_hash_func, trivial_compare_func);
467 if (r < 0)
468 goto fail;
469
470 r = set_ensure_allocated(&m->failed_units, trivial_hash_func, trivial_compare_func);
471 if (r < 0)
472 goto fail;
473
474 r = sd_event_default(&m->event);
475 if (r < 0)
476 goto fail;
477
478 r = sd_event_add_defer(m->event, &m->run_queue_event_source, manager_dispatch_run_queue, m);
479 if (r < 0)
480 goto fail;
481
482 r = sd_event_source_set_priority(m->run_queue_event_source, SD_EVENT_PRIORITY_IDLE);
483 if (r < 0)
484 goto fail;
485
486 r = sd_event_source_set_enabled(m->run_queue_event_source, SD_EVENT_OFF);
487 if (r < 0)
488 goto fail;
489
490 r = manager_setup_signals(m);
491 if (r < 0)
492 goto fail;
493
494 r = manager_setup_cgroup(m);
495 if (r < 0)
496 goto fail;
497
498 r = manager_setup_time_change(m);
499 if (r < 0)
500 goto fail;
501
502 m->udev = udev_new();
503 if (!m->udev) {
504 r = -ENOMEM;
505 goto fail;
506 }
507
508 /* Note that we set up neither kdbus, nor the notify fd
509 * here. We do that after deserialization, since they might
510 * have gotten serialized across the reexec. */
511
512 m->taint_usr = dir_is_empty("/usr") > 0;
513
514 *_m = m;
515 return 0;
516
517 fail:
518 manager_free(m);
519 return r;
520 }
521
522 static int manager_setup_notify(Manager *m) {
523 int r;
524
525 if (m->test_run)
526 return 0;
527
528 if (m->notify_fd < 0) {
529 _cleanup_close_ int fd = -1;
530 union {
531 struct sockaddr sa;
532 struct sockaddr_un un;
533 } sa = {
534 .sa.sa_family = AF_UNIX,
535 };
536 int one = 1;
537
538 /* First free all secondary fields */
539 free(m->notify_socket);
540 m->notify_socket = NULL;
541 m->notify_event_source = sd_event_source_unref(m->notify_event_source);
542
543 fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
544 if (fd < 0) {
545 log_error("Failed to allocate notification socket: %m");
546 return -errno;
547 }
548
549 if (m->running_as == SYSTEMD_SYSTEM)
550 m->notify_socket = strdup("/run/systemd/notify");
551 else {
552 const char *e;
553
554 e = getenv("XDG_RUNTIME_DIR");
555 if (!e) {
556 log_error("XDG_RUNTIME_DIR is not set: %m");
557 return -EINVAL;
558 }
559
560 m->notify_socket = strappend(e, "/systemd/notify");
561 }
562 if (!m->notify_socket)
563 return log_oom();
564
565 strncpy(sa.un.sun_path, m->notify_socket, sizeof(sa.un.sun_path)-1);
566 r = bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path));
567 if (r < 0) {
568 log_error("bind(@%s) failed: %m", sa.un.sun_path+1);
569 return -errno;
570 }
571
572 r = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
573 if (r < 0) {
574 log_error("SO_PASSCRED failed: %m");
575 return -errno;
576 }
577
578 m->notify_fd = fd;
579 fd = -1;
580
581 log_debug("Using notification socket %s", m->notify_socket);
582 }
583
584 if (!m->notify_event_source) {
585 r = sd_event_add_io(m->event, &m->notify_event_source, m->notify_fd, EPOLLIN, manager_dispatch_notify_fd, m);
586 if (r < 0) {
587 log_error("Failed to allocate notify event source: %s", strerror(-r));
588 return -errno;
589 }
590
591 /* Process signals a bit earlier than SIGCHLD, so that we can
592 * still identify to which service an exit message belongs */
593 r = sd_event_source_set_priority(m->notify_event_source, -7);
594 if (r < 0) {
595 log_error("Failed to set priority of notify event source: %s", strerror(-r));
596 return r;
597 }
598 }
599
600 return 0;
601 }
602
603 static int manager_setup_kdbus(Manager *m) {
604 #ifdef ENABLE_KDBUS
605 _cleanup_free_ char *p = NULL;
606
607 assert(m);
608
609 if (m->test_run || m->kdbus_fd >= 0)
610 return 0;
611
612 m->kdbus_fd = bus_kernel_create_bus(m->running_as == SYSTEMD_SYSTEM ? "system" : "user", m->running_as == SYSTEMD_SYSTEM, &p);
613 if (m->kdbus_fd < 0) {
614 log_debug("Failed to set up kdbus: %s", strerror(-m->kdbus_fd));
615 return m->kdbus_fd;
616 }
617
618 log_debug("Successfully set up kdbus on %s", p);
619
620 /* Create the namespace directory here, so that the contents
621 * of that directory is not visible to non-root users. This is
622 * necessary to ensure that users cannot get access to busses
623 * of virtualized users when no UID namespacing is used. */
624 if (m->running_as == SYSTEMD_SYSTEM)
625 mkdir_p_label("/dev/kdbus/domain", 0700);
626 #endif
627
628 return 0;
629 }
630
631 static int manager_connect_bus(Manager *m, bool reexecuting) {
632 bool try_bus_connect;
633
634 assert(m);
635
636 if (m->test_run)
637 return 0;
638
639 try_bus_connect =
640 m->kdbus_fd >= 0 ||
641 reexecuting ||
642 (m->running_as == SYSTEMD_USER && getenv("DBUS_SESSION_BUS_ADDRESS"));
643
644 /* Try to connect to the busses, if possible. */
645 return bus_init(m, try_bus_connect);
646 }
647
648 static unsigned manager_dispatch_cleanup_queue(Manager *m) {
649 Unit *u;
650 unsigned n = 0;
651
652 assert(m);
653
654 while ((u = m->cleanup_queue)) {
655 assert(u->in_cleanup_queue);
656
657 unit_free(u);
658 n++;
659 }
660
661 return n;
662 }
663
664 enum {
665 GC_OFFSET_IN_PATH, /* This one is on the path we were traveling */
666 GC_OFFSET_UNSURE, /* No clue */
667 GC_OFFSET_GOOD, /* We still need this unit */
668 GC_OFFSET_BAD, /* We don't need this unit anymore */
669 _GC_OFFSET_MAX
670 };
671
672 static void unit_gc_sweep(Unit *u, unsigned gc_marker) {
673 Iterator i;
674 Unit *other;
675 bool is_bad;
676
677 assert(u);
678
679 if (u->gc_marker == gc_marker + GC_OFFSET_GOOD ||
680 u->gc_marker == gc_marker + GC_OFFSET_BAD ||
681 u->gc_marker == gc_marker + GC_OFFSET_IN_PATH)
682 return;
683
684 if (u->in_cleanup_queue)
685 goto bad;
686
687 if (unit_check_gc(u))
688 goto good;
689
690 u->gc_marker = gc_marker + GC_OFFSET_IN_PATH;
691
692 is_bad = true;
693
694 SET_FOREACH(other, u->dependencies[UNIT_REFERENCED_BY], i) {
695 unit_gc_sweep(other, gc_marker);
696
697 if (other->gc_marker == gc_marker + GC_OFFSET_GOOD)
698 goto good;
699
700 if (other->gc_marker != gc_marker + GC_OFFSET_BAD)
701 is_bad = false;
702 }
703
704 if (is_bad)
705 goto bad;
706
707 /* We were unable to find anything out about this entry, so
708 * let's investigate it later */
709 u->gc_marker = gc_marker + GC_OFFSET_UNSURE;
710 unit_add_to_gc_queue(u);
711 return;
712
713 bad:
714 /* We definitely know that this one is not useful anymore, so
715 * let's mark it for deletion */
716 u->gc_marker = gc_marker + GC_OFFSET_BAD;
717 unit_add_to_cleanup_queue(u);
718 return;
719
720 good:
721 u->gc_marker = gc_marker + GC_OFFSET_GOOD;
722 }
723
724 static unsigned manager_dispatch_gc_queue(Manager *m) {
725 Unit *u;
726 unsigned n = 0;
727 unsigned gc_marker;
728
729 assert(m);
730
731 /* log_debug("Running GC..."); */
732
733 m->gc_marker += _GC_OFFSET_MAX;
734 if (m->gc_marker + _GC_OFFSET_MAX <= _GC_OFFSET_MAX)
735 m->gc_marker = 1;
736
737 gc_marker = m->gc_marker;
738
739 while ((u = m->gc_queue)) {
740 assert(u->in_gc_queue);
741
742 unit_gc_sweep(u, gc_marker);
743
744 LIST_REMOVE(gc_queue, m->gc_queue, u);
745 u->in_gc_queue = false;
746
747 n++;
748
749 if (u->gc_marker == gc_marker + GC_OFFSET_BAD ||
750 u->gc_marker == gc_marker + GC_OFFSET_UNSURE) {
751 log_debug_unit(u->id, "Collecting %s", u->id);
752 u->gc_marker = gc_marker + GC_OFFSET_BAD;
753 unit_add_to_cleanup_queue(u);
754 }
755 }
756
757 m->n_in_gc_queue = 0;
758
759 return n;
760 }
761
762 static void manager_clear_jobs_and_units(Manager *m) {
763 Unit *u;
764
765 assert(m);
766
767 while ((u = hashmap_first(m->units)))
768 unit_free(u);
769
770 manager_dispatch_cleanup_queue(m);
771
772 assert(!m->load_queue);
773 assert(!m->run_queue);
774 assert(!m->dbus_unit_queue);
775 assert(!m->dbus_job_queue);
776 assert(!m->cleanup_queue);
777 assert(!m->gc_queue);
778
779 assert(hashmap_isempty(m->jobs));
780 assert(hashmap_isempty(m->units));
781
782 m->n_on_console = 0;
783 m->n_running_jobs = 0;
784 }
785
786 void manager_free(Manager *m) {
787 UnitType c;
788 int i;
789
790 assert(m);
791
792 manager_clear_jobs_and_units(m);
793
794 for (c = 0; c < _UNIT_TYPE_MAX; c++)
795 if (unit_vtable[c]->shutdown)
796 unit_vtable[c]->shutdown(m);
797
798 /* If we reexecute ourselves, we keep the root cgroup
799 * around */
800 manager_shutdown_cgroup(m, m->exit_code != MANAGER_REEXECUTE);
801
802 manager_undo_generators(m);
803
804 bus_done(m);
805
806 hashmap_free(m->units);
807 hashmap_free(m->jobs);
808 hashmap_free(m->watch_pids1);
809 hashmap_free(m->watch_pids2);
810 hashmap_free(m->watch_bus);
811
812 set_free(m->startup_units);
813 set_free(m->failed_units);
814
815 sd_event_source_unref(m->signal_event_source);
816 sd_event_source_unref(m->notify_event_source);
817 sd_event_source_unref(m->time_change_event_source);
818 sd_event_source_unref(m->jobs_in_progress_event_source);
819 sd_event_source_unref(m->idle_pipe_event_source);
820 sd_event_source_unref(m->run_queue_event_source);
821
822 safe_close(m->signal_fd);
823 safe_close(m->notify_fd);
824 safe_close(m->time_change_fd);
825 safe_close(m->kdbus_fd);
826
827 manager_close_idle_pipe(m);
828
829 udev_unref(m->udev);
830 sd_event_unref(m->event);
831
832 free(m->notify_socket);
833
834 lookup_paths_free(&m->lookup_paths);
835 strv_free(m->environment);
836
837 hashmap_free(m->cgroup_unit);
838 set_free_free(m->unit_path_cache);
839
840 free(m->switch_root);
841 free(m->switch_root_init);
842
843 for (i = 0; i < _RLIMIT_MAX; i++)
844 free(m->rlimit[i]);
845
846 assert(hashmap_isempty(m->units_requiring_mounts_for));
847 hashmap_free(m->units_requiring_mounts_for);
848
849 free(m);
850 }
851
852 int manager_enumerate(Manager *m) {
853 int r = 0, q;
854 UnitType c;
855
856 assert(m);
857
858 /* Let's ask every type to load all units from disk/kernel
859 * that it might know */
860 for (c = 0; c < _UNIT_TYPE_MAX; c++)
861 if (unit_vtable[c]->enumerate) {
862 q = unit_vtable[c]->enumerate(m);
863 if (q < 0)
864 r = q;
865 }
866
867 manager_dispatch_load_queue(m);
868 return r;
869 }
870
871 static int manager_coldplug(Manager *m) {
872 int r = 0;
873 Iterator i;
874 Unit *u;
875 char *k;
876
877 assert(m);
878
879 /* Then, let's set up their initial state. */
880 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
881 int q;
882
883 /* ignore aliases */
884 if (u->id != k)
885 continue;
886
887 q = unit_coldplug(u);
888 if (q < 0)
889 r = q;
890 }
891
892 return r;
893 }
894
895 static void manager_build_unit_path_cache(Manager *m) {
896 char **i;
897 _cleanup_free_ DIR *d = NULL;
898 int r;
899
900 assert(m);
901
902 set_free_free(m->unit_path_cache);
903
904 m->unit_path_cache = set_new(string_hash_func, string_compare_func);
905 if (!m->unit_path_cache) {
906 log_error("Failed to allocate unit path cache.");
907 return;
908 }
909
910 /* This simply builds a list of files we know exist, so that
911 * we don't always have to go to disk */
912
913 STRV_FOREACH(i, m->lookup_paths.unit_path) {
914 struct dirent *de;
915
916 d = opendir(*i);
917 if (!d) {
918 if (errno != ENOENT)
919 log_error("Failed to open directory %s: %m", *i);
920 continue;
921 }
922
923 while ((de = readdir(d))) {
924 char *p;
925
926 if (ignore_file(de->d_name))
927 continue;
928
929 p = strjoin(streq(*i, "/") ? "" : *i, "/", de->d_name, NULL);
930 if (!p) {
931 r = -ENOMEM;
932 goto fail;
933 }
934
935 r = set_consume(m->unit_path_cache, p);
936 if (r < 0)
937 goto fail;
938 }
939
940 closedir(d);
941 d = NULL;
942 }
943
944 return;
945
946 fail:
947 log_error("Failed to build unit path cache: %s", strerror(-r));
948
949 set_free_free(m->unit_path_cache);
950 m->unit_path_cache = NULL;
951 }
952
953
954 static int manager_distribute_fds(Manager *m, FDSet *fds) {
955 Unit *u;
956 Iterator i;
957 int r;
958
959 assert(m);
960
961 HASHMAP_FOREACH(u, m->units, i) {
962
963 if (fdset_size(fds) <= 0)
964 break;
965
966 if (UNIT_VTABLE(u)->distribute_fds) {
967 r = UNIT_VTABLE(u)->distribute_fds(u, fds);
968 if (r < 0)
969 return r;
970 }
971 }
972
973 return 0;
974 }
975
976 int manager_startup(Manager *m, FILE *serialization, FDSet *fds) {
977 int r, q;
978
979 assert(m);
980
981 dual_timestamp_get(&m->generators_start_timestamp);
982 manager_run_generators(m);
983 dual_timestamp_get(&m->generators_finish_timestamp);
984
985 r = lookup_paths_init(
986 &m->lookup_paths, m->running_as, true,
987 NULL,
988 m->generator_unit_path,
989 m->generator_unit_path_early,
990 m->generator_unit_path_late);
991 if (r < 0)
992 return r;
993
994 manager_build_unit_path_cache(m);
995
996 /* If we will deserialize make sure that during enumeration
997 * this is already known, so we increase the counter here
998 * already */
999 if (serialization)
1000 m->n_reloading ++;
1001
1002 /* First, enumerate what we can from all config files */
1003 dual_timestamp_get(&m->units_load_start_timestamp);
1004 r = manager_enumerate(m);
1005 dual_timestamp_get(&m->units_load_finish_timestamp);
1006
1007 /* Second, deserialize if there is something to deserialize */
1008 if (serialization)
1009 r = manager_deserialize(m, serialization, fds);
1010
1011 /* Any fds left? Find some unit which wants them. This is
1012 * useful to allow container managers to pass some file
1013 * descriptors to us pre-initialized. This enables
1014 * socket-based activation of entire containers. */
1015 if (fdset_size(fds) > 0) {
1016 q = manager_distribute_fds(m, fds);
1017 if (q < 0 && r == 0)
1018 r = q;
1019 }
1020
1021 /* We might have deserialized the notify fd, but if we didn't
1022 * then let's create the bus now */
1023 q = manager_setup_notify(m);
1024 if (q < 0 && r == 0)
1025 r = q;
1026
1027 /* We might have deserialized the kdbus control fd, but if we
1028 * didn't, then let's create the bus now. */
1029 manager_setup_kdbus(m);
1030 manager_connect_bus(m, !!serialization);
1031 bus_track_coldplug(m, &m->subscribed, &m->deserialized_subscribed);
1032
1033 /* Third, fire things up! */
1034 q = manager_coldplug(m);
1035 if (q < 0 && r == 0)
1036 r = q;
1037
1038 if (serialization) {
1039 assert(m->n_reloading > 0);
1040 m->n_reloading --;
1041
1042 /* Let's wait for the UnitNew/JobNew messages being
1043 * sent, before we notify that the reload is
1044 * finished */
1045 m->send_reloading_done = true;
1046 }
1047
1048 return r;
1049 }
1050
1051 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool override, sd_bus_error *e, Job **_ret) {
1052 int r;
1053 Transaction *tr;
1054
1055 assert(m);
1056 assert(type < _JOB_TYPE_MAX);
1057 assert(unit);
1058 assert(mode < _JOB_MODE_MAX);
1059
1060 if (mode == JOB_ISOLATE && type != JOB_START) {
1061 sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Isolate is only valid for start.");
1062 return -EINVAL;
1063 }
1064
1065 if (mode == JOB_ISOLATE && !unit->allow_isolate) {
1066 sd_bus_error_setf(e, BUS_ERROR_NO_ISOLATION, "Operation refused, unit may not be isolated.");
1067 return -EPERM;
1068 }
1069
1070 log_debug_unit(unit->id,
1071 "Trying to enqueue job %s/%s/%s", unit->id,
1072 job_type_to_string(type), job_mode_to_string(mode));
1073
1074 job_type_collapse(&type, unit);
1075
1076 tr = transaction_new(mode == JOB_REPLACE_IRREVERSIBLY);
1077 if (!tr)
1078 return -ENOMEM;
1079
1080 r = transaction_add_job_and_dependencies(tr, type, unit, NULL, true, override, false,
1081 mode == JOB_IGNORE_DEPENDENCIES || mode == JOB_IGNORE_REQUIREMENTS,
1082 mode == JOB_IGNORE_DEPENDENCIES, e);
1083 if (r < 0)
1084 goto tr_abort;
1085
1086 if (mode == JOB_ISOLATE) {
1087 r = transaction_add_isolate_jobs(tr, m);
1088 if (r < 0)
1089 goto tr_abort;
1090 }
1091
1092 r = transaction_activate(tr, m, mode, e);
1093 if (r < 0)
1094 goto tr_abort;
1095
1096 log_debug_unit(unit->id,
1097 "Enqueued job %s/%s as %u", unit->id,
1098 job_type_to_string(type), (unsigned) tr->anchor_job->id);
1099
1100 if (_ret)
1101 *_ret = tr->anchor_job;
1102
1103 transaction_free(tr);
1104 return 0;
1105
1106 tr_abort:
1107 transaction_abort(tr);
1108 transaction_free(tr);
1109 return r;
1110 }
1111
1112 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool override, sd_bus_error *e, Job **_ret) {
1113 Unit *unit;
1114 int r;
1115
1116 assert(m);
1117 assert(type < _JOB_TYPE_MAX);
1118 assert(name);
1119 assert(mode < _JOB_MODE_MAX);
1120
1121 r = manager_load_unit(m, name, NULL, NULL, &unit);
1122 if (r < 0)
1123 return r;
1124
1125 return manager_add_job(m, type, unit, mode, override, e, _ret);
1126 }
1127
1128 Job *manager_get_job(Manager *m, uint32_t id) {
1129 assert(m);
1130
1131 return hashmap_get(m->jobs, UINT32_TO_PTR(id));
1132 }
1133
1134 Unit *manager_get_unit(Manager *m, const char *name) {
1135 assert(m);
1136 assert(name);
1137
1138 return hashmap_get(m->units, name);
1139 }
1140
1141 unsigned manager_dispatch_load_queue(Manager *m) {
1142 Unit *u;
1143 unsigned n = 0;
1144
1145 assert(m);
1146
1147 /* Make sure we are not run recursively */
1148 if (m->dispatching_load_queue)
1149 return 0;
1150
1151 m->dispatching_load_queue = true;
1152
1153 /* Dispatches the load queue. Takes a unit from the queue and
1154 * tries to load its data until the queue is empty */
1155
1156 while ((u = m->load_queue)) {
1157 assert(u->in_load_queue);
1158
1159 unit_load(u);
1160 n++;
1161 }
1162
1163 m->dispatching_load_queue = false;
1164 return n;
1165 }
1166
1167 int manager_load_unit_prepare(
1168 Manager *m,
1169 const char *name,
1170 const char *path,
1171 sd_bus_error *e,
1172 Unit **_ret) {
1173
1174 Unit *ret;
1175 UnitType t;
1176 int r;
1177
1178 assert(m);
1179 assert(name || path);
1180
1181 /* This will prepare the unit for loading, but not actually
1182 * load anything from disk. */
1183
1184 if (path && !is_path(path))
1185 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not absolute.", path);
1186
1187 if (!name)
1188 name = basename(path);
1189
1190 t = unit_name_to_type(name);
1191
1192 if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, TEMPLATE_INVALID))
1193 return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is not valid.", name);
1194
1195 ret = manager_get_unit(m, name);
1196 if (ret) {
1197 *_ret = ret;
1198 return 1;
1199 }
1200
1201 ret = unit_new(m, unit_vtable[t]->object_size);
1202 if (!ret)
1203 return -ENOMEM;
1204
1205 if (path) {
1206 ret->fragment_path = strdup(path);
1207 if (!ret->fragment_path) {
1208 unit_free(ret);
1209 return -ENOMEM;
1210 }
1211 }
1212
1213 r = unit_add_name(ret, name);
1214 if (r < 0) {
1215 unit_free(ret);
1216 return r;
1217 }
1218
1219 unit_add_to_load_queue(ret);
1220 unit_add_to_dbus_queue(ret);
1221 unit_add_to_gc_queue(ret);
1222
1223 if (_ret)
1224 *_ret = ret;
1225
1226 return 0;
1227 }
1228
1229 int manager_load_unit(
1230 Manager *m,
1231 const char *name,
1232 const char *path,
1233 sd_bus_error *e,
1234 Unit **_ret) {
1235
1236 int r;
1237
1238 assert(m);
1239
1240 /* This will load the service information files, but not actually
1241 * start any services or anything. */
1242
1243 r = manager_load_unit_prepare(m, name, path, e, _ret);
1244 if (r != 0)
1245 return r;
1246
1247 manager_dispatch_load_queue(m);
1248
1249 if (_ret)
1250 *_ret = unit_follow_merge(*_ret);
1251
1252 return 0;
1253 }
1254
1255 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix) {
1256 Iterator i;
1257 Job *j;
1258
1259 assert(s);
1260 assert(f);
1261
1262 HASHMAP_FOREACH(j, s->jobs, i)
1263 job_dump(j, f, prefix);
1264 }
1265
1266 void manager_dump_units(Manager *s, FILE *f, const char *prefix) {
1267 Iterator i;
1268 Unit *u;
1269 const char *t;
1270
1271 assert(s);
1272 assert(f);
1273
1274 HASHMAP_FOREACH_KEY(u, t, s->units, i)
1275 if (u->id == t)
1276 unit_dump(u, f, prefix);
1277 }
1278
1279 void manager_clear_jobs(Manager *m) {
1280 Job *j;
1281
1282 assert(m);
1283
1284 while ((j = hashmap_first(m->jobs)))
1285 /* No need to recurse. We're cancelling all jobs. */
1286 job_finish_and_invalidate(j, JOB_CANCELED, false);
1287 }
1288
1289 static int manager_dispatch_run_queue(sd_event_source *source, void *userdata) {
1290 Manager *m = userdata;
1291 Job *j;
1292
1293 assert(source);
1294 assert(m);
1295
1296 while ((j = m->run_queue)) {
1297 assert(j->installed);
1298 assert(j->in_run_queue);
1299
1300 job_run_and_invalidate(j);
1301 }
1302
1303 if (m->n_running_jobs > 0)
1304 manager_watch_jobs_in_progress(m);
1305
1306 if (m->n_on_console > 0)
1307 manager_watch_idle_pipe(m);
1308
1309 return 1;
1310 }
1311
1312 static unsigned manager_dispatch_dbus_queue(Manager *m) {
1313 Job *j;
1314 Unit *u;
1315 unsigned n = 0;
1316
1317 assert(m);
1318
1319 if (m->dispatching_dbus_queue)
1320 return 0;
1321
1322 m->dispatching_dbus_queue = true;
1323
1324 while ((u = m->dbus_unit_queue)) {
1325 assert(u->in_dbus_queue);
1326
1327 bus_unit_send_change_signal(u);
1328 n++;
1329 }
1330
1331 while ((j = m->dbus_job_queue)) {
1332 assert(j->in_dbus_queue);
1333
1334 bus_job_send_change_signal(j);
1335 n++;
1336 }
1337
1338 m->dispatching_dbus_queue = false;
1339
1340 if (m->send_reloading_done) {
1341 m->send_reloading_done = false;
1342
1343 bus_manager_send_reloading(m, false);
1344 }
1345
1346 if (m->queued_message)
1347 bus_send_queued_message(m);
1348
1349 return n;
1350 }
1351
1352 static void manager_invoke_notify_message(Manager *m, Unit *u, pid_t pid, char *buf, size_t n) {
1353 _cleanup_strv_free_ char **tags = NULL;
1354
1355 assert(m);
1356 assert(u);
1357 assert(buf);
1358 assert(n > 0);
1359
1360 tags = strv_split(buf, "\n\r");
1361 if (!tags) {
1362 log_oom();
1363 return;
1364 }
1365
1366 log_debug_unit(u->id, "Got notification message for unit %s", u->id);
1367
1368 if (UNIT_VTABLE(u)->notify_message)
1369 UNIT_VTABLE(u)->notify_message(u, pid, tags);
1370 }
1371
1372 static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1373 Manager *m = userdata;
1374 ssize_t n;
1375
1376 assert(m);
1377 assert(m->notify_fd == fd);
1378
1379 if (revents != EPOLLIN) {
1380 log_warning("Got unexpected poll event for notify fd.");
1381 return 0;
1382 }
1383
1384 for (;;) {
1385 char buf[4096];
1386 struct iovec iovec = {
1387 .iov_base = buf,
1388 .iov_len = sizeof(buf)-1,
1389 };
1390 bool found = false;
1391
1392 union {
1393 struct cmsghdr cmsghdr;
1394 uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
1395 } control = {};
1396
1397 struct msghdr msghdr = {
1398 .msg_iov = &iovec,
1399 .msg_iovlen = 1,
1400 .msg_control = &control,
1401 .msg_controllen = sizeof(control),
1402 };
1403 struct ucred *ucred;
1404 Unit *u;
1405
1406 n = recvmsg(m->notify_fd, &msghdr, MSG_DONTWAIT);
1407 if (n <= 0) {
1408 if (n == 0)
1409 return -EIO;
1410
1411 if (errno == EAGAIN || errno == EINTR)
1412 break;
1413
1414 return -errno;
1415 }
1416
1417 if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||
1418 control.cmsghdr.cmsg_level != SOL_SOCKET ||
1419 control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||
1420 control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
1421 log_warning("Received notify message without credentials. Ignoring.");
1422 continue;
1423 }
1424
1425 ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
1426
1427 assert((size_t) n < sizeof(buf));
1428 buf[n] = 0;
1429
1430 u = manager_get_unit_by_pid(m, ucred->pid);
1431 if (u) {
1432 manager_invoke_notify_message(m, u, ucred->pid, buf, n);
1433 found = true;
1434 }
1435
1436 u = hashmap_get(m->watch_pids1, LONG_TO_PTR(ucred->pid));
1437 if (u) {
1438 manager_invoke_notify_message(m, u, ucred->pid, buf, n);
1439 found = true;
1440 }
1441
1442 u = hashmap_get(m->watch_pids2, LONG_TO_PTR(ucred->pid));
1443 if (u) {
1444 manager_invoke_notify_message(m, u, ucred->pid, buf, n);
1445 found = true;
1446 }
1447
1448 if (!found)
1449 log_warning("Cannot find unit for notify message of PID "PID_FMT".", ucred->pid);
1450 }
1451
1452 return 0;
1453 }
1454
1455 static void invoke_sigchld_event(Manager *m, Unit *u, siginfo_t *si) {
1456 assert(m);
1457 assert(u);
1458 assert(si);
1459
1460 log_debug_unit(u->id, "Child "PID_FMT" belongs to %s", si->si_pid, u->id);
1461
1462 unit_unwatch_pid(u, si->si_pid);
1463 UNIT_VTABLE(u)->sigchld_event(u, si->si_pid, si->si_code, si->si_status);
1464 }
1465
1466 static int manager_dispatch_sigchld(Manager *m) {
1467 assert(m);
1468
1469 for (;;) {
1470 siginfo_t si = {};
1471
1472 /* First we call waitd() for a PID and do not reap the
1473 * zombie. That way we can still access /proc/$PID for
1474 * it while it is a zombie. */
1475 if (waitid(P_ALL, 0, &si, WEXITED|WNOHANG|WNOWAIT) < 0) {
1476
1477 if (errno == ECHILD)
1478 break;
1479
1480 if (errno == EINTR)
1481 continue;
1482
1483 return -errno;
1484 }
1485
1486 if (si.si_pid <= 0)
1487 break;
1488
1489 if (si.si_code == CLD_EXITED || si.si_code == CLD_KILLED || si.si_code == CLD_DUMPED) {
1490 _cleanup_free_ char *name = NULL;
1491 Unit *u;
1492
1493 get_process_comm(si.si_pid, &name);
1494
1495 log_debug("Child "PID_FMT" (%s) died (code=%s, status=%i/%s)",
1496 si.si_pid, strna(name),
1497 sigchld_code_to_string(si.si_code),
1498 si.si_status,
1499 strna(si.si_code == CLD_EXITED
1500 ? exit_status_to_string(si.si_status, EXIT_STATUS_FULL)
1501 : signal_to_string(si.si_status)));
1502
1503 /* And now figure out the unit this belongs
1504 * to, it might be multiple... */
1505 u = manager_get_unit_by_pid(m, si.si_pid);
1506 if (u)
1507 invoke_sigchld_event(m, u, &si);
1508 u = hashmap_get(m->watch_pids1, LONG_TO_PTR(si.si_pid));
1509 if (u)
1510 invoke_sigchld_event(m, u, &si);
1511 u = hashmap_get(m->watch_pids2, LONG_TO_PTR(si.si_pid));
1512 if (u)
1513 invoke_sigchld_event(m, u, &si);
1514 }
1515
1516 /* And now, we actually reap the zombie. */
1517 if (waitid(P_PID, si.si_pid, &si, WEXITED) < 0) {
1518 if (errno == EINTR)
1519 continue;
1520
1521 return -errno;
1522 }
1523 }
1524
1525 return 0;
1526 }
1527
1528 static int manager_start_target(Manager *m, const char *name, JobMode mode) {
1529 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1530 int r;
1531
1532 log_debug_unit(name, "Activating special unit %s", name);
1533
1534 r = manager_add_job_by_name(m, JOB_START, name, mode, true, &error, NULL);
1535 if (r < 0)
1536 log_error_unit(name, "Failed to enqueue %s job: %s", name, bus_error_message(&error, r));
1537
1538 return r;
1539 }
1540
1541 static int manager_dispatch_signal_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1542 Manager *m = userdata;
1543 ssize_t n;
1544 struct signalfd_siginfo sfsi;
1545 bool sigchld = false;
1546
1547 assert(m);
1548 assert(m->signal_fd == fd);
1549
1550 if (revents != EPOLLIN) {
1551 log_warning("Got unexpected events from signal file descriptor.");
1552 return 0;
1553 }
1554
1555 for (;;) {
1556 n = read(m->signal_fd, &sfsi, sizeof(sfsi));
1557 if (n != sizeof(sfsi)) {
1558
1559 if (n >= 0)
1560 return -EIO;
1561
1562 if (errno == EINTR || errno == EAGAIN)
1563 break;
1564
1565 return -errno;
1566 }
1567
1568 log_received_signal(sfsi.ssi_signo == SIGCHLD ||
1569 (sfsi.ssi_signo == SIGTERM && m->running_as == SYSTEMD_USER)
1570 ? LOG_DEBUG : LOG_INFO,
1571 &sfsi);
1572
1573 switch (sfsi.ssi_signo) {
1574
1575 case SIGCHLD:
1576 sigchld = true;
1577 break;
1578
1579 case SIGTERM:
1580 if (m->running_as == SYSTEMD_SYSTEM) {
1581 /* This is for compatibility with the
1582 * original sysvinit */
1583 m->exit_code = MANAGER_REEXECUTE;
1584 break;
1585 }
1586
1587 /* Fall through */
1588
1589 case SIGINT:
1590 if (m->running_as == SYSTEMD_SYSTEM) {
1591 manager_start_target(m, SPECIAL_CTRL_ALT_DEL_TARGET, JOB_REPLACE_IRREVERSIBLY);
1592 break;
1593 }
1594
1595 /* Run the exit target if there is one, if not, just exit. */
1596 if (manager_start_target(m, SPECIAL_EXIT_TARGET, JOB_REPLACE) < 0) {
1597 m->exit_code = MANAGER_EXIT;
1598 return 0;
1599 }
1600
1601 break;
1602
1603 case SIGWINCH:
1604 if (m->running_as == SYSTEMD_SYSTEM)
1605 manager_start_target(m, SPECIAL_KBREQUEST_TARGET, JOB_REPLACE);
1606
1607 /* This is a nop on non-init */
1608 break;
1609
1610 case SIGPWR:
1611 if (m->running_as == SYSTEMD_SYSTEM)
1612 manager_start_target(m, SPECIAL_SIGPWR_TARGET, JOB_REPLACE);
1613
1614 /* This is a nop on non-init */
1615 break;
1616
1617 case SIGUSR1: {
1618 Unit *u;
1619
1620 u = manager_get_unit(m, SPECIAL_DBUS_SERVICE);
1621
1622 if (!u || UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u))) {
1623 log_info("Trying to reconnect to bus...");
1624 bus_init(m, true);
1625 }
1626
1627 if (!u || !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) {
1628 log_info("Loading D-Bus service...");
1629 manager_start_target(m, SPECIAL_DBUS_SERVICE, JOB_REPLACE);
1630 }
1631
1632 break;
1633 }
1634
1635 case SIGUSR2: {
1636 _cleanup_free_ char *dump = NULL;
1637 _cleanup_fclose_ FILE *f = NULL;
1638 size_t size;
1639
1640 f = open_memstream(&dump, &size);
1641 if (!f) {
1642 log_warning("Failed to allocate memory stream.");
1643 break;
1644 }
1645
1646 manager_dump_units(m, f, "\t");
1647 manager_dump_jobs(m, f, "\t");
1648
1649 if (ferror(f)) {
1650 log_warning("Failed to write status stream");
1651 break;
1652 }
1653
1654 if (fflush(f)) {
1655 log_warning("Failed to flush status stream");
1656 break;
1657 }
1658
1659 log_dump(LOG_INFO, dump);
1660 break;
1661 }
1662
1663 case SIGHUP:
1664 m->exit_code = MANAGER_RELOAD;
1665 break;
1666
1667 default: {
1668
1669 /* Starting SIGRTMIN+0 */
1670 static const char * const target_table[] = {
1671 [0] = SPECIAL_DEFAULT_TARGET,
1672 [1] = SPECIAL_RESCUE_TARGET,
1673 [2] = SPECIAL_EMERGENCY_TARGET,
1674 [3] = SPECIAL_HALT_TARGET,
1675 [4] = SPECIAL_POWEROFF_TARGET,
1676 [5] = SPECIAL_REBOOT_TARGET,
1677 [6] = SPECIAL_KEXEC_TARGET
1678 };
1679
1680 /* Starting SIGRTMIN+13, so that target halt and system halt are 10 apart */
1681 static const ManagerExitCode code_table[] = {
1682 [0] = MANAGER_HALT,
1683 [1] = MANAGER_POWEROFF,
1684 [2] = MANAGER_REBOOT,
1685 [3] = MANAGER_KEXEC
1686 };
1687
1688 if ((int) sfsi.ssi_signo >= SIGRTMIN+0 &&
1689 (int) sfsi.ssi_signo < SIGRTMIN+(int) ELEMENTSOF(target_table)) {
1690 int idx = (int) sfsi.ssi_signo - SIGRTMIN;
1691 manager_start_target(m, target_table[idx],
1692 (idx == 1 || idx == 2) ? JOB_ISOLATE : JOB_REPLACE);
1693 break;
1694 }
1695
1696 if ((int) sfsi.ssi_signo >= SIGRTMIN+13 &&
1697 (int) sfsi.ssi_signo < SIGRTMIN+13+(int) ELEMENTSOF(code_table)) {
1698 m->exit_code = code_table[sfsi.ssi_signo - SIGRTMIN - 13];
1699 break;
1700 }
1701
1702 switch (sfsi.ssi_signo - SIGRTMIN) {
1703
1704 case 20:
1705 log_debug("Enabling showing of status.");
1706 manager_set_show_status(m, SHOW_STATUS_YES);
1707 break;
1708
1709 case 21:
1710 log_debug("Disabling showing of status.");
1711 manager_set_show_status(m, SHOW_STATUS_NO);
1712 break;
1713
1714 case 22:
1715 log_set_max_level(LOG_DEBUG);
1716 log_notice("Setting log level to debug.");
1717 break;
1718
1719 case 23:
1720 log_set_max_level(LOG_INFO);
1721 log_notice("Setting log level to info.");
1722 break;
1723
1724 case 24:
1725 if (m->running_as == SYSTEMD_USER) {
1726 m->exit_code = MANAGER_EXIT;
1727 return 0;
1728 }
1729
1730 /* This is a nop on init */
1731 break;
1732
1733 case 26:
1734 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1735 log_notice("Setting log target to journal-or-kmsg.");
1736 break;
1737
1738 case 27:
1739 log_set_target(LOG_TARGET_CONSOLE);
1740 log_notice("Setting log target to console.");
1741 break;
1742
1743 case 28:
1744 log_set_target(LOG_TARGET_KMSG);
1745 log_notice("Setting log target to kmsg.");
1746 break;
1747
1748 case 29:
1749 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1750 log_notice("Setting log target to syslog-or-kmsg.");
1751 break;
1752
1753 default:
1754 log_warning("Got unhandled signal <%s>.", signal_to_string(sfsi.ssi_signo));
1755 }
1756 }
1757 }
1758 }
1759
1760 if (sigchld)
1761 manager_dispatch_sigchld(m);
1762
1763 return 0;
1764 }
1765
1766 static int manager_dispatch_time_change_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1767 Manager *m = userdata;
1768 Iterator i;
1769 Unit *u;
1770
1771 assert(m);
1772 assert(m->time_change_fd == fd);
1773
1774 log_struct(LOG_INFO,
1775 MESSAGE_ID(SD_MESSAGE_TIME_CHANGE),
1776 "MESSAGE=Time has been changed",
1777 NULL);
1778
1779 /* Restart the watch */
1780 m->time_change_event_source = sd_event_source_unref(m->time_change_event_source);
1781 m->time_change_fd = safe_close(m->time_change_fd);
1782
1783 manager_setup_time_change(m);
1784
1785 HASHMAP_FOREACH(u, m->units, i)
1786 if (UNIT_VTABLE(u)->time_change)
1787 UNIT_VTABLE(u)->time_change(u);
1788
1789 return 0;
1790 }
1791
1792 static int manager_dispatch_idle_pipe_fd(sd_event_source *source, int fd, uint32_t revents, void *userdata) {
1793 Manager *m = userdata;
1794
1795 assert(m);
1796 assert(m->idle_pipe[2] == fd);
1797
1798 m->no_console_output = m->n_on_console > 0;
1799
1800 m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
1801 manager_close_idle_pipe(m);
1802
1803 return 0;
1804 }
1805
1806 static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata) {
1807 Manager *m = userdata;
1808 int r;
1809 uint64_t next;
1810
1811 assert(m);
1812 assert(source);
1813
1814 manager_print_jobs_in_progress(m);
1815
1816 next = now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_PERIOD_USEC;
1817 r = sd_event_source_set_time(source, next);
1818 if (r < 0)
1819 return r;
1820
1821 return sd_event_source_set_enabled(source, SD_EVENT_ONESHOT);
1822 }
1823
1824 int manager_loop(Manager *m) {
1825 int r;
1826
1827 RATELIMIT_DEFINE(rl, 1*USEC_PER_SEC, 50000);
1828
1829 assert(m);
1830 m->exit_code = MANAGER_OK;
1831
1832 /* Release the path cache */
1833 set_free_free(m->unit_path_cache);
1834 m->unit_path_cache = NULL;
1835
1836 manager_check_finished(m);
1837
1838 /* There might still be some zombies hanging around from
1839 * before we were exec()'ed. Let's reap them. */
1840 r = manager_dispatch_sigchld(m);
1841 if (r < 0)
1842 return r;
1843
1844 while (m->exit_code == MANAGER_OK) {
1845 usec_t wait_usec;
1846
1847 if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM)
1848 watchdog_ping();
1849
1850 if (!ratelimit_test(&rl)) {
1851 /* Yay, something is going seriously wrong, pause a little */
1852 log_warning("Looping too fast. Throttling execution a little.");
1853 sleep(1);
1854 continue;
1855 }
1856
1857 if (manager_dispatch_load_queue(m) > 0)
1858 continue;
1859
1860 if (manager_dispatch_gc_queue(m) > 0)
1861 continue;
1862
1863 if (manager_dispatch_cleanup_queue(m) > 0)
1864 continue;
1865
1866 if (manager_dispatch_cgroup_queue(m) > 0)
1867 continue;
1868
1869 if (manager_dispatch_dbus_queue(m) > 0)
1870 continue;
1871
1872 /* Sleep for half the watchdog time */
1873 if (m->runtime_watchdog > 0 && m->running_as == SYSTEMD_SYSTEM) {
1874 wait_usec = m->runtime_watchdog / 2;
1875 if (wait_usec <= 0)
1876 wait_usec = 1;
1877 } else
1878 wait_usec = USEC_INFINITY;
1879
1880 r = sd_event_run(m->event, wait_usec);
1881 if (r < 0) {
1882 log_error("Failed to run event loop: %s", strerror(-r));
1883 return r;
1884 }
1885 }
1886
1887 return m->exit_code;
1888 }
1889
1890 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u) {
1891 _cleanup_free_ char *n = NULL;
1892 Unit *u;
1893 int r;
1894
1895 assert(m);
1896 assert(s);
1897 assert(_u);
1898
1899 r = unit_name_from_dbus_path(s, &n);
1900 if (r < 0)
1901 return r;
1902
1903 r = manager_load_unit(m, n, NULL, e, &u);
1904 if (r < 0)
1905 return r;
1906
1907 *_u = u;
1908
1909 return 0;
1910 }
1911
1912 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j) {
1913 const char *p;
1914 unsigned id;
1915 Job *j;
1916 int r;
1917
1918 assert(m);
1919 assert(s);
1920 assert(_j);
1921
1922 p = startswith(s, "/org/freedesktop/systemd1/job/");
1923 if (!p)
1924 return -EINVAL;
1925
1926 r = safe_atou(p, &id);
1927 if (r < 0)
1928 return r;
1929
1930 j = manager_get_job(m, id);
1931 if (!j)
1932 return -ENOENT;
1933
1934 *_j = j;
1935
1936 return 0;
1937 }
1938
1939 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success) {
1940
1941 #ifdef HAVE_AUDIT
1942 _cleanup_free_ char *p = NULL;
1943 int audit_fd;
1944
1945 audit_fd = get_audit_fd();
1946 if (audit_fd < 0)
1947 return;
1948
1949 /* Don't generate audit events if the service was already
1950 * started and we're just deserializing */
1951 if (m->n_reloading > 0)
1952 return;
1953
1954 if (m->running_as != SYSTEMD_SYSTEM)
1955 return;
1956
1957 if (u->type != UNIT_SERVICE)
1958 return;
1959
1960 p = unit_name_to_prefix_and_instance(u->id);
1961 if (!p) {
1962 log_error_unit(u->id,
1963 "Failed to allocate unit name for audit message: %s", strerror(ENOMEM));
1964 return;
1965 }
1966
1967 if (audit_log_user_comm_message(audit_fd, type, "", p, NULL, NULL, NULL, success) < 0) {
1968 if (errno == EPERM) {
1969 /* We aren't allowed to send audit messages?
1970 * Then let's not retry again. */
1971 close_audit_fd();
1972 } else
1973 log_warning("Failed to send audit message: %m");
1974 }
1975 #endif
1976
1977 }
1978
1979 void manager_send_unit_plymouth(Manager *m, Unit *u) {
1980 union sockaddr_union sa = {
1981 .un.sun_family = AF_UNIX,
1982 .un.sun_path = "\0/org/freedesktop/plymouthd",
1983 };
1984
1985 int n = 0;
1986 _cleanup_free_ char *message = NULL;
1987 _cleanup_close_ int fd = -1;
1988
1989 /* Don't generate plymouth events if the service was already
1990 * started and we're just deserializing */
1991 if (m->n_reloading > 0)
1992 return;
1993
1994 if (m->running_as != SYSTEMD_SYSTEM)
1995 return;
1996
1997 if (detect_container(NULL) > 0)
1998 return;
1999
2000 if (u->type != UNIT_SERVICE &&
2001 u->type != UNIT_MOUNT &&
2002 u->type != UNIT_SWAP)
2003 return;
2004
2005 /* We set SOCK_NONBLOCK here so that we rather drop the
2006 * message then wait for plymouth */
2007 fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
2008 if (fd < 0) {
2009 log_error("socket() failed: %m");
2010 return;
2011 }
2012
2013 if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
2014
2015 if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED))
2016 log_error("connect() failed: %m");
2017 return;
2018 }
2019
2020 if (asprintf(&message, "U\002%c%s%n", (int) (strlen(u->id) + 1), u->id, &n) < 0) {
2021 log_oom();
2022 return;
2023 }
2024
2025 errno = 0;
2026 if (write(fd, message, n + 1) != n + 1)
2027 if (!IN_SET(errno, EPIPE, EAGAIN, ENOENT, ECONNREFUSED, ECONNRESET, ECONNABORTED))
2028 log_error("Failed to write Plymouth message: %m");
2029 }
2030
2031 void manager_dispatch_bus_name_owner_changed(
2032 Manager *m,
2033 const char *name,
2034 const char* old_owner,
2035 const char *new_owner) {
2036
2037 Unit *u;
2038
2039 assert(m);
2040 assert(name);
2041
2042 u = hashmap_get(m->watch_bus, name);
2043 if (!u)
2044 return;
2045
2046 UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner);
2047 }
2048
2049 int manager_open_serialization(Manager *m, FILE **_f) {
2050 const char *path;
2051 int fd = -1;
2052 FILE *f;
2053
2054 assert(_f);
2055
2056 path = m->running_as == SYSTEMD_SYSTEM ? "/run/systemd" : "/tmp";
2057 fd = open_tmpfile(path, O_RDWR|O_CLOEXEC);
2058 if (fd < 0)
2059 return -errno;
2060
2061 log_debug("Serializing state to %s", path);
2062
2063 f = fdopen(fd, "w+");
2064 if (!f) {
2065 safe_close(fd);
2066 return -errno;
2067 }
2068
2069 *_f = f;
2070
2071 return 0;
2072 }
2073
2074 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root) {
2075 Iterator i;
2076 Unit *u;
2077 const char *t;
2078 char **e;
2079 int r;
2080
2081 assert(m);
2082 assert(f);
2083 assert(fds);
2084
2085 m->n_reloading ++;
2086
2087 fprintf(f, "current-job-id=%i\n", m->current_job_id);
2088 fprintf(f, "taint-usr=%s\n", yes_no(m->taint_usr));
2089 fprintf(f, "n-installed-jobs=%u\n", m->n_installed_jobs);
2090 fprintf(f, "n-failed-jobs=%u\n", m->n_failed_jobs);
2091
2092 dual_timestamp_serialize(f, "firmware-timestamp", &m->firmware_timestamp);
2093 dual_timestamp_serialize(f, "loader-timestamp", &m->loader_timestamp);
2094 dual_timestamp_serialize(f, "kernel-timestamp", &m->kernel_timestamp);
2095 dual_timestamp_serialize(f, "initrd-timestamp", &m->initrd_timestamp);
2096
2097 if (!in_initrd()) {
2098 dual_timestamp_serialize(f, "userspace-timestamp", &m->userspace_timestamp);
2099 dual_timestamp_serialize(f, "finish-timestamp", &m->finish_timestamp);
2100 dual_timestamp_serialize(f, "security-start-timestamp", &m->security_start_timestamp);
2101 dual_timestamp_serialize(f, "security-finish-timestamp", &m->security_finish_timestamp);
2102 dual_timestamp_serialize(f, "generators-start-timestamp", &m->generators_start_timestamp);
2103 dual_timestamp_serialize(f, "generators-finish-timestamp", &m->generators_finish_timestamp);
2104 dual_timestamp_serialize(f, "units-load-start-timestamp", &m->units_load_start_timestamp);
2105 dual_timestamp_serialize(f, "units-load-finish-timestamp", &m->units_load_finish_timestamp);
2106 }
2107
2108 if (!switching_root) {
2109 STRV_FOREACH(e, m->environment) {
2110 _cleanup_free_ char *ce;
2111
2112 ce = cescape(*e);
2113 if (!ce)
2114 return -ENOMEM;
2115
2116 fprintf(f, "env=%s\n", *e);
2117 }
2118 }
2119
2120 if (m->notify_fd >= 0) {
2121 int copy;
2122
2123 copy = fdset_put_dup(fds, m->notify_fd);
2124 if (copy < 0)
2125 return copy;
2126
2127 fprintf(f, "notify-fd=%i\n", copy);
2128 fprintf(f, "notify-socket=%s\n", m->notify_socket);
2129 }
2130
2131 if (m->kdbus_fd >= 0) {
2132 int copy;
2133
2134 copy = fdset_put_dup(fds, m->kdbus_fd);
2135 if (copy < 0)
2136 return copy;
2137
2138 fprintf(f, "kdbus-fd=%i\n", copy);
2139 }
2140
2141 bus_track_serialize(m->subscribed, f);
2142
2143 fputc('\n', f);
2144
2145 HASHMAP_FOREACH_KEY(u, t, m->units, i) {
2146 if (u->id != t)
2147 continue;
2148
2149 /* Start marker */
2150 fputs(u->id, f);
2151 fputc('\n', f);
2152
2153 r = unit_serialize(u, f, fds, !switching_root);
2154 if (r < 0) {
2155 m->n_reloading --;
2156 return r;
2157 }
2158 }
2159
2160 assert(m->n_reloading > 0);
2161 m->n_reloading --;
2162
2163 if (ferror(f))
2164 return -EIO;
2165
2166 r = bus_fdset_add_all(m, fds);
2167 if (r < 0)
2168 return r;
2169
2170 return 0;
2171 }
2172
2173 int manager_deserialize(Manager *m, FILE *f, FDSet *fds) {
2174 int r = 0;
2175
2176 assert(m);
2177 assert(f);
2178
2179 log_debug("Deserializing state...");
2180
2181 m->n_reloading ++;
2182
2183 for (;;) {
2184 char line[LINE_MAX], *l;
2185
2186 if (!fgets(line, sizeof(line), f)) {
2187 if (feof(f))
2188 r = 0;
2189 else
2190 r = -errno;
2191
2192 goto finish;
2193 }
2194
2195 char_array_0(line);
2196 l = strstrip(line);
2197
2198 if (l[0] == 0)
2199 break;
2200
2201 if (startswith(l, "current-job-id=")) {
2202 uint32_t id;
2203
2204 if (safe_atou32(l+15, &id) < 0)
2205 log_debug("Failed to parse current job id value %s", l+15);
2206 else
2207 m->current_job_id = MAX(m->current_job_id, id);
2208
2209 } else if (startswith(l, "n-installed-jobs=")) {
2210 uint32_t n;
2211
2212 if (safe_atou32(l+17, &n) < 0)
2213 log_debug("Failed to parse installed jobs counter %s", l+17);
2214 else
2215 m->n_installed_jobs += n;
2216
2217 } else if (startswith(l, "n-failed-jobs=")) {
2218 uint32_t n;
2219
2220 if (safe_atou32(l+14, &n) < 0)
2221 log_debug("Failed to parse failed jobs counter %s", l+14);
2222 else
2223 m->n_failed_jobs += n;
2224
2225 } else if (startswith(l, "taint-usr=")) {
2226 int b;
2227
2228 b = parse_boolean(l+10);
2229 if (b < 0)
2230 log_debug("Failed to parse taint /usr flag %s", l+10);
2231 else
2232 m->taint_usr = m->taint_usr || b;
2233
2234 } else if (startswith(l, "firmware-timestamp="))
2235 dual_timestamp_deserialize(l+19, &m->firmware_timestamp);
2236 else if (startswith(l, "loader-timestamp="))
2237 dual_timestamp_deserialize(l+17, &m->loader_timestamp);
2238 else if (startswith(l, "kernel-timestamp="))
2239 dual_timestamp_deserialize(l+17, &m->kernel_timestamp);
2240 else if (startswith(l, "initrd-timestamp="))
2241 dual_timestamp_deserialize(l+17, &m->initrd_timestamp);
2242 else if (startswith(l, "userspace-timestamp="))
2243 dual_timestamp_deserialize(l+20, &m->userspace_timestamp);
2244 else if (startswith(l, "finish-timestamp="))
2245 dual_timestamp_deserialize(l+17, &m->finish_timestamp);
2246 else if (startswith(l, "security-start-timestamp="))
2247 dual_timestamp_deserialize(l+25, &m->security_start_timestamp);
2248 else if (startswith(l, "security-finish-timestamp="))
2249 dual_timestamp_deserialize(l+26, &m->security_finish_timestamp);
2250 else if (startswith(l, "generators-start-timestamp="))
2251 dual_timestamp_deserialize(l+27, &m->generators_start_timestamp);
2252 else if (startswith(l, "generators-finish-timestamp="))
2253 dual_timestamp_deserialize(l+28, &m->generators_finish_timestamp);
2254 else if (startswith(l, "units-load-start-timestamp="))
2255 dual_timestamp_deserialize(l+27, &m->units_load_start_timestamp);
2256 else if (startswith(l, "units-load-finish-timestamp="))
2257 dual_timestamp_deserialize(l+28, &m->units_load_finish_timestamp);
2258 else if (startswith(l, "env=")) {
2259 _cleanup_free_ char *uce = NULL;
2260 char **e;
2261
2262 uce = cunescape(l+4);
2263 if (!uce) {
2264 r = -ENOMEM;
2265 goto finish;
2266 }
2267
2268 e = strv_env_set(m->environment, uce);
2269 if (!e) {
2270 r = -ENOMEM;
2271 goto finish;
2272 }
2273
2274 strv_free(m->environment);
2275 m->environment = e;
2276
2277 } else if (startswith(l, "notify-fd=")) {
2278 int fd;
2279
2280 if (safe_atoi(l + 10, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2281 log_debug("Failed to parse notify fd: %s", l + 10);
2282 else {
2283 m->notify_event_source = sd_event_source_unref(m->notify_event_source);
2284 safe_close(m->notify_fd);
2285 m->notify_fd = fdset_remove(fds, fd);
2286 }
2287
2288 } else if (startswith(l, "notify-socket=")) {
2289 char *n;
2290
2291 n = strdup(l+14);
2292 if (!n) {
2293 r = -ENOMEM;
2294 goto finish;
2295 }
2296
2297 free(m->notify_socket);
2298 m->notify_socket = n;
2299
2300 } else if (startswith(l, "kdbus-fd=")) {
2301 int fd;
2302
2303 if (safe_atoi(l + 9, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2304 log_debug("Failed to parse kdbus fd: %s", l + 9);
2305 else {
2306 safe_close(m->kdbus_fd);
2307 m->kdbus_fd = fdset_remove(fds, fd);
2308 }
2309
2310 } else if (bus_track_deserialize_item(&m->deserialized_subscribed, l) == 0)
2311 log_debug("Unknown serialization item '%s'", l);
2312 }
2313
2314 for (;;) {
2315 Unit *u;
2316 char name[UNIT_NAME_MAX+2];
2317
2318 /* Start marker */
2319 if (!fgets(name, sizeof(name), f)) {
2320 if (feof(f))
2321 r = 0;
2322 else
2323 r = -errno;
2324
2325 goto finish;
2326 }
2327
2328 char_array_0(name);
2329
2330 r = manager_load_unit(m, strstrip(name), NULL, NULL, &u);
2331 if (r < 0)
2332 goto finish;
2333
2334 r = unit_deserialize(u, f, fds);
2335 if (r < 0)
2336 goto finish;
2337 }
2338
2339 finish:
2340 if (ferror(f))
2341 r = -EIO;
2342
2343 assert(m->n_reloading > 0);
2344 m->n_reloading --;
2345
2346 return r;
2347 }
2348
2349 int manager_reload(Manager *m) {
2350 int r, q;
2351 _cleanup_fclose_ FILE *f = NULL;
2352 _cleanup_fdset_free_ FDSet *fds = NULL;
2353
2354 assert(m);
2355
2356 r = manager_open_serialization(m, &f);
2357 if (r < 0)
2358 return r;
2359
2360 m->n_reloading ++;
2361 bus_manager_send_reloading(m, true);
2362
2363 fds = fdset_new();
2364 if (!fds) {
2365 m->n_reloading --;
2366 return -ENOMEM;
2367 }
2368
2369 r = manager_serialize(m, f, fds, false);
2370 if (r < 0) {
2371 m->n_reloading --;
2372 return r;
2373 }
2374
2375 if (fseeko(f, 0, SEEK_SET) < 0) {
2376 m->n_reloading --;
2377 return -errno;
2378 }
2379
2380 /* From here on there is no way back. */
2381 manager_clear_jobs_and_units(m);
2382 manager_undo_generators(m);
2383 lookup_paths_free(&m->lookup_paths);
2384
2385 /* Find new unit paths */
2386 manager_run_generators(m);
2387
2388 q = lookup_paths_init(
2389 &m->lookup_paths, m->running_as, true,
2390 NULL,
2391 m->generator_unit_path,
2392 m->generator_unit_path_early,
2393 m->generator_unit_path_late);
2394 if (q < 0)
2395 r = q;
2396
2397 manager_build_unit_path_cache(m);
2398
2399 /* First, enumerate what we can from all config files */
2400 q = manager_enumerate(m);
2401 if (q < 0)
2402 r = q;
2403
2404 /* Second, deserialize our stored data */
2405 q = manager_deserialize(m, f, fds);
2406 if (q < 0)
2407 r = q;
2408
2409 fclose(f);
2410 f = NULL;
2411
2412 /* Re-register notify_fd as event source */
2413 q = manager_setup_notify(m);
2414 if (q < 0)
2415 r = q;
2416
2417 /* Third, fire things up! */
2418 q = manager_coldplug(m);
2419 if (q < 0)
2420 r = q;
2421
2422 assert(m->n_reloading > 0);
2423 m->n_reloading--;
2424
2425 m->send_reloading_done = true;
2426
2427 return r;
2428 }
2429
2430 bool manager_is_reloading_or_reexecuting(Manager *m) {
2431 assert(m);
2432
2433 return m->n_reloading != 0;
2434 }
2435
2436 void manager_reset_failed(Manager *m) {
2437 Unit *u;
2438 Iterator i;
2439
2440 assert(m);
2441
2442 HASHMAP_FOREACH(u, m->units, i)
2443 unit_reset_failed(u);
2444 }
2445
2446 bool manager_unit_inactive_or_pending(Manager *m, const char *name) {
2447 Unit *u;
2448
2449 assert(m);
2450 assert(name);
2451
2452 /* Returns true if the unit is inactive or going down */
2453 u = manager_get_unit(m, name);
2454 if (!u)
2455 return true;
2456
2457 return unit_inactive_or_pending(u);
2458 }
2459
2460 void manager_check_finished(Manager *m) {
2461 char userspace[FORMAT_TIMESPAN_MAX], initrd[FORMAT_TIMESPAN_MAX], kernel[FORMAT_TIMESPAN_MAX], sum[FORMAT_TIMESPAN_MAX];
2462 usec_t firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec;
2463 Unit *u = NULL;
2464 Iterator i;
2465
2466 assert(m);
2467
2468 if (m->n_running_jobs == 0)
2469 m->jobs_in_progress_event_source = sd_event_source_unref(m->jobs_in_progress_event_source);
2470
2471 if (hashmap_size(m->jobs) > 0) {
2472
2473 if (m->jobs_in_progress_event_source) {
2474 sd_event_source_set_time(m->jobs_in_progress_event_source,
2475 now(CLOCK_MONOTONIC) + JOBS_IN_PROGRESS_WAIT_USEC);
2476 }
2477
2478 return;
2479 }
2480
2481 manager_flip_auto_status(m, false);
2482
2483 /* Notify Type=idle units that we are done now */
2484 m->idle_pipe_event_source = sd_event_source_unref(m->idle_pipe_event_source);
2485 manager_close_idle_pipe(m);
2486
2487 /* Turn off confirm spawn now */
2488 m->confirm_spawn = false;
2489
2490 /* This is no longer the first boot */
2491 manager_set_first_boot(m, false);
2492
2493 if (dual_timestamp_is_set(&m->finish_timestamp))
2494 return;
2495
2496 dual_timestamp_get(&m->finish_timestamp);
2497
2498 if (m->running_as == SYSTEMD_SYSTEM && detect_container(NULL) <= 0) {
2499
2500 /* Note that m->kernel_usec.monotonic is always at 0,
2501 * and m->firmware_usec.monotonic and
2502 * m->loader_usec.monotonic should be considered
2503 * negative values. */
2504
2505 firmware_usec = m->firmware_timestamp.monotonic - m->loader_timestamp.monotonic;
2506 loader_usec = m->loader_timestamp.monotonic - m->kernel_timestamp.monotonic;
2507 userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;
2508 total_usec = m->firmware_timestamp.monotonic + m->finish_timestamp.monotonic;
2509
2510 if (dual_timestamp_is_set(&m->initrd_timestamp)) {
2511
2512 kernel_usec = m->initrd_timestamp.monotonic - m->kernel_timestamp.monotonic;
2513 initrd_usec = m->userspace_timestamp.monotonic - m->initrd_timestamp.monotonic;
2514
2515 if (!log_on_console())
2516 log_struct(LOG_INFO,
2517 MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2518 "KERNEL_USEC="USEC_FMT, kernel_usec,
2519 "INITRD_USEC="USEC_FMT, initrd_usec,
2520 "USERSPACE_USEC="USEC_FMT, userspace_usec,
2521 "MESSAGE=Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
2522 format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
2523 format_timespan(initrd, sizeof(initrd), initrd_usec, USEC_PER_MSEC),
2524 format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
2525 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
2526 NULL);
2527 } else {
2528 kernel_usec = m->userspace_timestamp.monotonic - m->kernel_timestamp.monotonic;
2529 initrd_usec = 0;
2530
2531 if (!log_on_console())
2532 log_struct(LOG_INFO,
2533 MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2534 "KERNEL_USEC="USEC_FMT, kernel_usec,
2535 "USERSPACE_USEC="USEC_FMT, userspace_usec,
2536 "MESSAGE=Startup finished in %s (kernel) + %s (userspace) = %s.",
2537 format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
2538 format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
2539 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
2540 NULL);
2541 }
2542 } else {
2543 firmware_usec = loader_usec = initrd_usec = kernel_usec = 0;
2544 total_usec = userspace_usec = m->finish_timestamp.monotonic - m->userspace_timestamp.monotonic;
2545
2546 if (!log_on_console())
2547 log_struct(LOG_INFO,
2548 MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
2549 "USERSPACE_USEC="USEC_FMT, userspace_usec,
2550 "MESSAGE=Startup finished in %s.",
2551 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
2552 NULL);
2553 }
2554
2555 SET_FOREACH(u, m->startup_units, i)
2556 if (u->cgroup_path)
2557 cgroup_context_apply(unit_get_cgroup_context(u), unit_get_cgroup_mask(u), u->cgroup_path, manager_state(m));
2558
2559 bus_manager_send_finished(m, firmware_usec, loader_usec, kernel_usec, initrd_usec, userspace_usec, total_usec);
2560
2561 sd_notifyf(false,
2562 "READY=1\nSTATUS=Startup finished in %s.",
2563 format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC));
2564 }
2565
2566 static int create_generator_dir(Manager *m, char **generator, const char *name) {
2567 char *p;
2568 int r;
2569
2570 assert(m);
2571 assert(generator);
2572 assert(name);
2573
2574 if (*generator)
2575 return 0;
2576
2577 if (m->running_as == SYSTEMD_SYSTEM && getpid() == 1) {
2578 /* systemd --system, not running --test */
2579
2580 p = strappend("/run/systemd/", name);
2581 if (!p)
2582 return log_oom();
2583
2584 r = mkdir_p_label(p, 0755);
2585 if (r < 0) {
2586 log_error("Failed to create generator directory %s: %s",
2587 p, strerror(-r));
2588 free(p);
2589 return r;
2590 }
2591 } else if (m->running_as == SYSTEMD_USER) {
2592 const char *s = NULL;
2593
2594 s = getenv("XDG_RUNTIME_DIR");
2595 if (!s)
2596 return -EINVAL;
2597 p = strjoin(s, "/systemd/", name, NULL);
2598 if (!p)
2599 return log_oom();
2600
2601 r = mkdir_p_label(p, 0755);
2602 if (r < 0) {
2603 log_error("Failed to create generator directory %s: %s",
2604 p, strerror(-r));
2605 free(p);
2606 return r;
2607 }
2608 } else {
2609 /* systemd --system --test */
2610
2611 p = strjoin("/tmp/systemd-", name, ".XXXXXX", NULL);
2612 if (!p)
2613 return log_oom();
2614
2615 if (!mkdtemp(p)) {
2616 log_error("Failed to create generator directory %s: %m",
2617 p);
2618 free(p);
2619 return -errno;
2620 }
2621 }
2622
2623 *generator = p;
2624 return 0;
2625 }
2626
2627 static void trim_generator_dir(Manager *m, char **generator) {
2628 assert(m);
2629 assert(generator);
2630
2631 if (!*generator)
2632 return;
2633
2634 if (rmdir(*generator) >= 0) {
2635 free(*generator);
2636 *generator = NULL;
2637 }
2638
2639 return;
2640 }
2641
2642 void manager_run_generators(Manager *m) {
2643 _cleanup_closedir_ DIR *d = NULL;
2644 const char *generator_path;
2645 const char *argv[5];
2646 int r;
2647
2648 assert(m);
2649
2650 if (m->test_run)
2651 return;
2652
2653 generator_path = m->running_as == SYSTEMD_SYSTEM ? SYSTEM_GENERATOR_PATH : USER_GENERATOR_PATH;
2654 d = opendir(generator_path);
2655 if (!d) {
2656 if (errno == ENOENT)
2657 return;
2658
2659 log_error("Failed to enumerate generator directory %s: %m",
2660 generator_path);
2661 return;
2662 }
2663
2664 r = create_generator_dir(m, &m->generator_unit_path, "generator");
2665 if (r < 0)
2666 goto finish;
2667
2668 r = create_generator_dir(m, &m->generator_unit_path_early, "generator.early");
2669 if (r < 0)
2670 goto finish;
2671
2672 r = create_generator_dir(m, &m->generator_unit_path_late, "generator.late");
2673 if (r < 0)
2674 goto finish;
2675
2676 argv[0] = NULL; /* Leave this empty, execute_directory() will fill something in */
2677 argv[1] = m->generator_unit_path;
2678 argv[2] = m->generator_unit_path_early;
2679 argv[3] = m->generator_unit_path_late;
2680 argv[4] = NULL;
2681
2682 RUN_WITH_UMASK(0022)
2683 execute_directory(generator_path, d, DEFAULT_TIMEOUT_USEC, (char**) argv);
2684
2685 finish:
2686 trim_generator_dir(m, &m->generator_unit_path);
2687 trim_generator_dir(m, &m->generator_unit_path_early);
2688 trim_generator_dir(m, &m->generator_unit_path_late);
2689 }
2690
2691 static void remove_generator_dir(Manager *m, char **generator) {
2692 assert(m);
2693 assert(generator);
2694
2695 if (!*generator)
2696 return;
2697
2698 strv_remove(m->lookup_paths.unit_path, *generator);
2699 rm_rf(*generator, false, true, false);
2700
2701 free(*generator);
2702 *generator = NULL;
2703 }
2704
2705 void manager_undo_generators(Manager *m) {
2706 assert(m);
2707
2708 remove_generator_dir(m, &m->generator_unit_path);
2709 remove_generator_dir(m, &m->generator_unit_path_early);
2710 remove_generator_dir(m, &m->generator_unit_path_late);
2711 }
2712
2713 int manager_environment_add(Manager *m, char **minus, char **plus) {
2714 char **a = NULL, **b = NULL, **l;
2715 assert(m);
2716
2717 l = m->environment;
2718
2719 if (!strv_isempty(minus)) {
2720 a = strv_env_delete(l, 1, minus);
2721 if (!a)
2722 return -ENOMEM;
2723
2724 l = a;
2725 }
2726
2727 if (!strv_isempty(plus)) {
2728 b = strv_env_merge(2, l, plus);
2729 if (!b)
2730 return -ENOMEM;
2731
2732 l = b;
2733 }
2734
2735 if (m->environment != l)
2736 strv_free(m->environment);
2737 if (a != l)
2738 strv_free(a);
2739 if (b != l)
2740 strv_free(b);
2741
2742 m->environment = l;
2743 manager_clean_environment(m);
2744 strv_sort(m->environment);
2745
2746 return 0;
2747 }
2748
2749 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit) {
2750 int i;
2751
2752 assert(m);
2753
2754 for (i = 0; i < _RLIMIT_MAX; i++) {
2755 if (!default_rlimit[i])
2756 continue;
2757
2758 m->rlimit[i] = newdup(struct rlimit, default_rlimit[i], 1);
2759 if (!m->rlimit[i])
2760 return -ENOMEM;
2761 }
2762
2763 return 0;
2764 }
2765
2766 void manager_recheck_journal(Manager *m) {
2767 Unit *u;
2768
2769 assert(m);
2770
2771 if (m->running_as != SYSTEMD_SYSTEM)
2772 return;
2773
2774 u = manager_get_unit(m, SPECIAL_JOURNALD_SOCKET);
2775 if (u && SOCKET(u)->state != SOCKET_RUNNING) {
2776 log_close_journal();
2777 return;
2778 }
2779
2780 u = manager_get_unit(m, SPECIAL_JOURNALD_SERVICE);
2781 if (u && SERVICE(u)->state != SERVICE_RUNNING) {
2782 log_close_journal();
2783 return;
2784 }
2785
2786 /* Hmm, OK, so the socket is fully up and the service is up
2787 * too, then let's make use of the thing. */
2788 log_open();
2789 }
2790
2791 void manager_set_show_status(Manager *m, ShowStatus mode) {
2792 assert(m);
2793 assert(IN_SET(mode, SHOW_STATUS_AUTO, SHOW_STATUS_NO, SHOW_STATUS_YES, SHOW_STATUS_TEMPORARY));
2794
2795 if (m->running_as != SYSTEMD_SYSTEM)
2796 return;
2797
2798 m->show_status = mode;
2799
2800 if (mode > 0)
2801 touch("/run/systemd/show-status");
2802 else
2803 unlink("/run/systemd/show-status");
2804 }
2805
2806 static bool manager_get_show_status(Manager *m) {
2807 assert(m);
2808
2809 if (m->running_as != SYSTEMD_SYSTEM)
2810 return false;
2811
2812 if (m->no_console_output)
2813 return false;
2814
2815 if (!IN_SET(manager_state(m), MANAGER_STARTING, MANAGER_STOPPING))
2816 return false;
2817
2818 if (m->show_status > 0)
2819 return true;
2820
2821 /* If Plymouth is running make sure we show the status, so
2822 * that there's something nice to see when people press Esc */
2823
2824 return plymouth_running();
2825 }
2826
2827 void manager_set_first_boot(Manager *m, bool b) {
2828 assert(m);
2829
2830 if (m->running_as != SYSTEMD_SYSTEM)
2831 return;
2832
2833 m->first_boot = b;
2834
2835 if (m->first_boot)
2836 touch("/run/systemd/first-boot");
2837 else
2838 unlink("/run/systemd/first-boot");
2839 }
2840
2841 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) {
2842 va_list ap;
2843
2844 if (!manager_get_show_status(m))
2845 return;
2846
2847 /* XXX We should totally drop the check for ephemeral here
2848 * and thus effectively make 'Type=idle' pointless. */
2849 if (ephemeral && m->n_on_console > 0)
2850 return;
2851
2852 va_start(ap, format);
2853 status_vprintf(status, true, ephemeral, format, ap);
2854 va_end(ap);
2855 }
2856
2857 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found) {
2858 _cleanup_free_ char *p = NULL;
2859 Unit *found;
2860
2861 assert(m);
2862 assert(path);
2863 assert(suffix);
2864 assert(_found);
2865
2866 p = unit_name_from_path(path, suffix);
2867 if (!p)
2868 return -ENOMEM;
2869
2870 found = manager_get_unit(m, p);
2871 if (!found) {
2872 *_found = NULL;
2873 return 0;
2874 }
2875
2876 *_found = found;
2877 return 1;
2878 }
2879
2880 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path) {
2881 char p[strlen(path)+1];
2882
2883 assert(m);
2884 assert(path);
2885
2886 strcpy(p, path);
2887 path_kill_slashes(p);
2888
2889 return hashmap_get(m->units_requiring_mounts_for, streq(p, "/") ? "" : p);
2890 }
2891
2892 const char *manager_get_runtime_prefix(Manager *m) {
2893 assert(m);
2894
2895 return m->running_as == SYSTEMD_SYSTEM ?
2896 "/run" :
2897 getenv("XDG_RUNTIME_DIR");
2898 }
2899
2900 ManagerState manager_state(Manager *m) {
2901 Unit *u;
2902
2903 assert(m);
2904
2905 /* Did we ever finish booting? If not then we are still starting up */
2906 if (!dual_timestamp_is_set(&m->finish_timestamp))
2907 return MANAGER_STARTING;
2908
2909 /* Is the special shutdown target queued? If so, we are in shutdown state */
2910 u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
2911 if (u && u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_TRY_RESTART, JOB_RELOAD_OR_START))
2912 return MANAGER_STOPPING;
2913
2914 /* Are the rescue or emergency targets active or queued? If so we are in maintenance state */
2915 u = manager_get_unit(m, SPECIAL_RESCUE_TARGET);
2916 if (u && (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)) ||
2917 (u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_TRY_RESTART, JOB_RELOAD_OR_START))))
2918 return MANAGER_MAINTENANCE;
2919
2920 u = manager_get_unit(m, SPECIAL_EMERGENCY_TARGET);
2921 if (u && (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u)) ||
2922 (u->job && IN_SET(u->job->type, JOB_START, JOB_RESTART, JOB_TRY_RESTART, JOB_RELOAD_OR_START))))
2923 return MANAGER_MAINTENANCE;
2924
2925 /* Are there any failed units? If so, we are in degraded mode */
2926 if (set_size(m->failed_units) > 0)
2927 return MANAGER_DEGRADED;
2928
2929 return MANAGER_RUNNING;
2930 }
2931
2932 static const char *const manager_state_table[_MANAGER_STATE_MAX] = {
2933 [MANAGER_STARTING] = "starting",
2934 [MANAGER_RUNNING] = "running",
2935 [MANAGER_DEGRADED] = "degraded",
2936 [MANAGER_MAINTENANCE] = "maintenance",
2937 [MANAGER_STOPPING] = "stopping",
2938 };
2939
2940 DEFINE_STRING_TABLE_LOOKUP(manager_state, ManagerState);
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