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core: introduce new Restart=on-abnormal setting
[thirdparty/systemd.git] / src / core / service.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 <errno.h>
23 #include <signal.h>
24 #include <dirent.h>
25 #include <unistd.h>
26 #include <sys/reboot.h>
27 #include <linux/reboot.h>
28 #include <sys/syscall.h>
29
30 #include "async.h"
31 #include "manager.h"
32 #include "unit.h"
33 #include "service.h"
34 #include "load-fragment.h"
35 #include "load-dropin.h"
36 #include "log.h"
37 #include "strv.h"
38 #include "unit-name.h"
39 #include "unit-printf.h"
40 #include "dbus-service.h"
41 #include "special.h"
42 #include "exit-status.h"
43 #include "def.h"
44 #include "path-util.h"
45 #include "util.h"
46 #include "utf8.h"
47 #include "env-util.h"
48 #include "fileio.h"
49 #include "bus-error.h"
50 #include "bus-util.h"
51
52 #ifdef HAVE_SYSV_COMPAT
53
54 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
55
56 typedef enum RunlevelType {
57 RUNLEVEL_UP,
58 RUNLEVEL_DOWN
59 } RunlevelType;
60
61 static const struct {
62 const char *path;
63 const char *target;
64 const RunlevelType type;
65 } rcnd_table[] = {
66 /* Standard SysV runlevels for start-up */
67 { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP },
68 { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
69 { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
70 { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
71 { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
72
73 /* Standard SysV runlevels for shutdown */
74 { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN },
75 { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }
76
77 /* Note that the order here matters, as we read the
78 directories in this order, and we want to make sure that
79 sysv_start_priority is known when we first load the
80 unit. And that value we only know from S links. Hence
81 UP must be read before DOWN */
82 };
83
84 #define RUNLEVELS_UP "12345"
85 #endif
86
87 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
88 [SERVICE_DEAD] = UNIT_INACTIVE,
89 [SERVICE_START_PRE] = UNIT_ACTIVATING,
90 [SERVICE_START] = UNIT_ACTIVATING,
91 [SERVICE_START_POST] = UNIT_ACTIVATING,
92 [SERVICE_RUNNING] = UNIT_ACTIVE,
93 [SERVICE_EXITED] = UNIT_ACTIVE,
94 [SERVICE_RELOAD] = UNIT_RELOADING,
95 [SERVICE_STOP] = UNIT_DEACTIVATING,
96 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
97 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
98 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
99 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
100 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
101 [SERVICE_FAILED] = UNIT_FAILED,
102 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
103 };
104
105 /* For Type=idle we never want to delay any other jobs, hence we
106 * consider idle jobs active as soon as we start working on them */
107 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
108 [SERVICE_DEAD] = UNIT_INACTIVE,
109 [SERVICE_START_PRE] = UNIT_ACTIVE,
110 [SERVICE_START] = UNIT_ACTIVE,
111 [SERVICE_START_POST] = UNIT_ACTIVE,
112 [SERVICE_RUNNING] = UNIT_ACTIVE,
113 [SERVICE_EXITED] = UNIT_ACTIVE,
114 [SERVICE_RELOAD] = UNIT_RELOADING,
115 [SERVICE_STOP] = UNIT_DEACTIVATING,
116 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
117 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
118 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
119 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
120 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
121 [SERVICE_FAILED] = UNIT_FAILED,
122 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
123 };
124
125 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
126 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
127 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
128
129 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
130
131 static void service_init(Unit *u) {
132 Service *s = SERVICE(u);
133
134 assert(u);
135 assert(u->load_state == UNIT_STUB);
136
137 s->timeout_start_usec = u->manager->default_timeout_start_usec;
138 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
139 s->restart_usec = u->manager->default_restart_usec;
140 s->type = _SERVICE_TYPE_INVALID;
141
142 #ifdef HAVE_SYSV_COMPAT
143 s->sysv_start_priority = -1;
144 s->sysv_start_priority_from_rcnd = -1;
145 #endif
146 s->socket_fd = -1;
147 s->guess_main_pid = true;
148
149 RATELIMIT_INIT(s->start_limit, u->manager->default_start_limit_interval, u->manager->default_start_limit_burst);
150
151 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
152 }
153
154 static void service_unwatch_control_pid(Service *s) {
155 assert(s);
156
157 if (s->control_pid <= 0)
158 return;
159
160 unit_unwatch_pid(UNIT(s), s->control_pid);
161 s->control_pid = 0;
162 }
163
164 static void service_unwatch_main_pid(Service *s) {
165 assert(s);
166
167 if (s->main_pid <= 0)
168 return;
169
170 unit_unwatch_pid(UNIT(s), s->main_pid);
171 s->main_pid = 0;
172 }
173
174 static void service_unwatch_pid_file(Service *s) {
175 if (!s->pid_file_pathspec)
176 return;
177
178 log_debug_unit(UNIT(s)->id, "Stopping watch for %s's PID file %s",
179 UNIT(s)->id, s->pid_file_pathspec->path);
180 path_spec_unwatch(s->pid_file_pathspec);
181 path_spec_done(s->pid_file_pathspec);
182 free(s->pid_file_pathspec);
183 s->pid_file_pathspec = NULL;
184 }
185
186 static int service_set_main_pid(Service *s, pid_t pid) {
187 pid_t ppid;
188
189 assert(s);
190
191 if (pid <= 1)
192 return -EINVAL;
193
194 if (pid == getpid())
195 return -EINVAL;
196
197 if (s->main_pid == pid && s->main_pid_known)
198 return 0;
199
200 if (s->main_pid != pid) {
201 service_unwatch_main_pid(s);
202 exec_status_start(&s->main_exec_status, pid);
203 }
204
205 s->main_pid = pid;
206 s->main_pid_known = true;
207
208 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
209 log_warning_unit(UNIT(s)->id,
210 "%s: Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.",
211 UNIT(s)->id, pid);
212
213 s->main_pid_alien = true;
214 } else
215 s->main_pid_alien = false;
216
217 return 0;
218 }
219
220 static void service_close_socket_fd(Service *s) {
221 assert(s);
222
223 if (s->socket_fd < 0)
224 return;
225
226 s->socket_fd = asynchronous_close(s->socket_fd);
227 }
228
229 static void service_connection_unref(Service *s) {
230 assert(s);
231
232 if (!UNIT_ISSET(s->accept_socket))
233 return;
234
235 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
236 unit_ref_unset(&s->accept_socket);
237 }
238
239 static void service_stop_watchdog(Service *s) {
240 assert(s);
241
242 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
243 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
244 }
245
246 static void service_start_watchdog(Service *s) {
247 int r;
248
249 assert(s);
250
251 if (s->watchdog_usec <= 0)
252 return;
253
254 if (s->watchdog_event_source) {
255 r = sd_event_source_set_time(s->watchdog_event_source, s->watchdog_timestamp.monotonic + s->watchdog_usec);
256 if (r < 0) {
257 log_warning_unit(UNIT(s)->id, "%s failed to reset watchdog timer: %s", UNIT(s)->id, strerror(-r));
258 return;
259 }
260
261 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
262 } else {
263 r = sd_event_add_time(
264 UNIT(s)->manager->event,
265 &s->watchdog_event_source,
266 CLOCK_MONOTONIC,
267 s->watchdog_timestamp.monotonic + s->watchdog_usec, 0,
268 service_dispatch_watchdog, s);
269 if (r < 0) {
270 log_warning_unit(UNIT(s)->id, "%s failed to add watchdog timer: %s", UNIT(s)->id, strerror(-r));
271 return;
272 }
273
274 /* Let's process everything else which might be a sign
275 * of living before we consider a service died. */
276 r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
277 }
278
279 if (r < 0)
280 log_warning_unit(UNIT(s)->id, "%s failed to install watchdog timer: %s", UNIT(s)->id, strerror(-r));
281 }
282
283 static void service_reset_watchdog(Service *s) {
284 assert(s);
285
286 dual_timestamp_get(&s->watchdog_timestamp);
287 service_start_watchdog(s);
288 }
289
290 static void service_done(Unit *u) {
291 Service *s = SERVICE(u);
292
293 assert(s);
294
295 free(s->pid_file);
296 s->pid_file = NULL;
297
298 #ifdef HAVE_SYSV_COMPAT
299 free(s->sysv_runlevels);
300 s->sysv_runlevels = NULL;
301 #endif
302
303 free(s->status_text);
304 s->status_text = NULL;
305
306 free(s->reboot_arg);
307 s->reboot_arg = NULL;
308
309 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
310 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
311 s->control_command = NULL;
312 s->main_command = NULL;
313
314 set_free(s->restart_ignore_status.code);
315 s->restart_ignore_status.code = NULL;
316 set_free(s->restart_ignore_status.signal);
317 s->restart_ignore_status.signal = NULL;
318
319 set_free(s->success_status.code);
320 s->success_status.code = NULL;
321 set_free(s->success_status.signal);
322 s->success_status.signal = NULL;
323
324 /* This will leak a process, but at least no memory or any of
325 * our resources */
326 service_unwatch_main_pid(s);
327 service_unwatch_control_pid(s);
328 service_unwatch_pid_file(s);
329
330 if (s->bus_name) {
331 unit_unwatch_bus_name(u, s->bus_name);
332 free(s->bus_name);
333 s->bus_name = NULL;
334 }
335
336 service_close_socket_fd(s);
337 service_connection_unref(s);
338
339 unit_ref_unset(&s->accept_socket);
340
341 service_stop_watchdog(s);
342
343 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
344 }
345
346 static int service_arm_timer(Service *s, usec_t usec) {
347 int r;
348
349 assert(s);
350
351 if (s->timer_event_source) {
352 r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + usec);
353 if (r < 0)
354 return r;
355
356 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
357 }
358
359 return sd_event_add_time(
360 UNIT(s)->manager->event,
361 &s->timer_event_source,
362 CLOCK_MONOTONIC,
363 now(CLOCK_MONOTONIC) + usec, 0,
364 service_dispatch_timer, s);
365 }
366
367 #ifdef HAVE_SYSV_COMPAT
368 static char *sysv_translate_name(const char *name) {
369 char *r;
370
371 r = new(char, strlen(name) + strlen(".service") + 1);
372 if (!r)
373 return NULL;
374
375 if (endswith(name, ".sh"))
376 /* Drop .sh suffix */
377 strcpy(stpcpy(r, name) - 3, ".service");
378 else
379 /* Normal init script name */
380 strcpy(stpcpy(r, name), ".service");
381
382 return r;
383 }
384
385 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
386
387 /* We silently ignore the $ prefix here. According to the LSB
388 * spec it simply indicates whether something is a
389 * standardized name or a distribution-specific one. Since we
390 * just follow what already exists and do not introduce new
391 * uses or names we don't care who introduced a new name. */
392
393 static const char * const table[] = {
394 /* LSB defined facilities */
395 "local_fs", NULL,
396 "network", SPECIAL_NETWORK_ONLINE_TARGET,
397 "named", SPECIAL_NSS_LOOKUP_TARGET,
398 "portmap", SPECIAL_RPCBIND_TARGET,
399 "remote_fs", SPECIAL_REMOTE_FS_TARGET,
400 "syslog", NULL,
401 "time", SPECIAL_TIME_SYNC_TARGET,
402 };
403
404 unsigned i;
405 char *r;
406 const char *n;
407
408 assert(name);
409 assert(_r);
410
411 n = *name == '$' ? name + 1 : name;
412
413 for (i = 0; i < ELEMENTSOF(table); i += 2) {
414
415 if (!streq(table[i], n))
416 continue;
417
418 if (!table[i+1])
419 return 0;
420
421 r = strdup(table[i+1]);
422 if (!r)
423 return log_oom();
424
425 goto finish;
426 }
427
428 /* If we don't know this name, fallback heuristics to figure
429 * out whether something is a target or a service alias. */
430
431 if (*name == '$') {
432 if (!unit_prefix_is_valid(n))
433 return -EINVAL;
434
435 /* Facilities starting with $ are most likely targets */
436 r = unit_name_build(n, NULL, ".target");
437 } else if (filename && streq(name, filename))
438 /* Names equaling the file name of the services are redundant */
439 return 0;
440 else
441 /* Everything else we assume to be normal service names */
442 r = sysv_translate_name(n);
443
444 if (!r)
445 return -ENOMEM;
446
447 finish:
448 *_r = r;
449
450 return 1;
451 }
452
453 static int sysv_fix_order(Service *s) {
454 Unit *other;
455 int r;
456
457 assert(s);
458
459 if (s->sysv_start_priority < 0)
460 return 0;
461
462 /* For each pair of services where at least one lacks a LSB
463 * header, we use the start priority value to order things. */
464
465 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
466 Service *t;
467 UnitDependency d;
468 bool special_s, special_t;
469
470 t = SERVICE(other);
471
472 if (s == t)
473 continue;
474
475 if (UNIT(t)->load_state != UNIT_LOADED)
476 continue;
477
478 if (t->sysv_start_priority < 0)
479 continue;
480
481 /* If both units have modern headers we don't care
482 * about the priorities */
483 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
484 (UNIT(t)->fragment_path || t->sysv_has_lsb))
485 continue;
486
487 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
488 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
489
490 if (special_t && !special_s)
491 d = UNIT_AFTER;
492 else if (special_s && !special_t)
493 d = UNIT_BEFORE;
494 else if (t->sysv_start_priority < s->sysv_start_priority)
495 d = UNIT_AFTER;
496 else if (t->sysv_start_priority > s->sysv_start_priority)
497 d = UNIT_BEFORE;
498 else
499 continue;
500
501 /* FIXME: Maybe we should compare the name here lexicographically? */
502
503 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
504 return r;
505 }
506
507 return 0;
508 }
509
510 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
511 ExecCommand *c;
512
513 if (!(c = new0(ExecCommand, 1)))
514 return NULL;
515
516 if (!(c->path = strdup(path))) {
517 free(c);
518 return NULL;
519 }
520
521 if (!(c->argv = strv_new(path, arg1, NULL))) {
522 free(c->path);
523 free(c);
524 return NULL;
525 }
526
527 return c;
528 }
529
530 static int sysv_exec_commands(Service *s, const bool supports_reload) {
531 ExecCommand *c;
532
533 assert(s);
534 assert(s->is_sysv);
535 assert(UNIT(s)->source_path);
536
537 c = exec_command_new(UNIT(s)->source_path, "start");
538 if (!c)
539 return -ENOMEM;
540 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
541
542 c = exec_command_new(UNIT(s)->source_path, "stop");
543 if (!c)
544 return -ENOMEM;
545 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
546
547 if (supports_reload) {
548 c = exec_command_new(UNIT(s)->source_path, "reload");
549 if (!c)
550 return -ENOMEM;
551 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
552 }
553
554 return 0;
555 }
556
557 static bool usage_contains_reload(const char *line) {
558 return (strcasestr(line, "{reload|") ||
559 strcasestr(line, "{reload}") ||
560 strcasestr(line, "{reload\"") ||
561 strcasestr(line, "|reload|") ||
562 strcasestr(line, "|reload}") ||
563 strcasestr(line, "|reload\""));
564 }
565
566 static int service_load_sysv_path(Service *s, const char *path) {
567 FILE *f;
568 Unit *u;
569 unsigned line = 0;
570 int r;
571 enum {
572 NORMAL,
573 DESCRIPTION,
574 LSB,
575 LSB_DESCRIPTION,
576 USAGE_CONTINUATION
577 } state = NORMAL;
578 char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
579 struct stat st;
580 bool supports_reload = false;
581
582 assert(s);
583 assert(path);
584
585 u = UNIT(s);
586
587 f = fopen(path, "re");
588 if (!f) {
589 r = errno == ENOENT ? 0 : -errno;
590 goto finish;
591 }
592
593 if (fstat(fileno(f), &st) < 0) {
594 r = -errno;
595 goto finish;
596 }
597
598 free(u->source_path);
599 u->source_path = strdup(path);
600 if (!u->source_path) {
601 r = -ENOMEM;
602 goto finish;
603 }
604 u->source_mtime = timespec_load(&st.st_mtim);
605
606 if (null_or_empty(&st)) {
607 u->load_state = UNIT_MASKED;
608 r = 0;
609 goto finish;
610 }
611
612 s->is_sysv = true;
613
614 while (!feof(f)) {
615 char l[LINE_MAX], *t;
616
617 if (!fgets(l, sizeof(l), f)) {
618 if (feof(f))
619 break;
620
621 r = -errno;
622 log_error_unit(u->id,
623 "Failed to read configuration file '%s': %s",
624 path, strerror(-r));
625 goto finish;
626 }
627
628 line++;
629
630 t = strstrip(l);
631 if (*t != '#') {
632 /* Try to figure out whether this init script supports
633 * the reload operation. This heuristic looks for
634 * "Usage" lines which include the reload option. */
635 if ( state == USAGE_CONTINUATION ||
636 (state == NORMAL && strcasestr(t, "usage"))) {
637 if (usage_contains_reload(t)) {
638 supports_reload = true;
639 state = NORMAL;
640 } else if (t[strlen(t)-1] == '\\')
641 state = USAGE_CONTINUATION;
642 else
643 state = NORMAL;
644 }
645
646 continue;
647 }
648
649 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
650 state = LSB;
651 s->sysv_has_lsb = true;
652 continue;
653 }
654
655 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
656 state = NORMAL;
657 continue;
658 }
659
660 t++;
661 t += strspn(t, WHITESPACE);
662
663 if (state == NORMAL) {
664
665 /* Try to parse Red Hat style chkconfig headers */
666
667 if (startswith_no_case(t, "chkconfig:")) {
668 int start_priority;
669 char runlevels[16], *k;
670
671 state = NORMAL;
672
673 if (sscanf(t+10, "%15s %i %*i", runlevels, &start_priority) != 2) {
674 log_warning_unit(u->id, "[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
675 continue;
676 }
677
678 /* A start priority gathered from the
679 * symlink farms is preferred over the
680 * data from the LSB header. */
681 if (start_priority < 0 || start_priority > 99)
682 log_warning_unit(u->id, "[%s:%u] Start priority out of range. Ignoring.", path, line);
683 else
684 log_debug_unit(u->id, "[%s:%u] Ignoring start priority set in the chkconfig file.", path, line);
685
686 char_array_0(runlevels);
687 k = delete_chars(runlevels, WHITESPACE "-");
688 if (k[0]) {
689 char *d;
690
691 d = strdup(k);
692 if (!d) {
693 r = -ENOMEM;
694 goto finish;
695 }
696
697 free(s->sysv_runlevels);
698 s->sysv_runlevels = d;
699 }
700
701 } else if (startswith_no_case(t, "description:")) {
702
703 size_t k = strlen(t);
704 char *d;
705 const char *j;
706
707 if (t[k-1] == '\\') {
708 state = DESCRIPTION;
709 t[k-1] = 0;
710 }
711
712 if ((j = strstrip(t+12)) && *j) {
713 if (!(d = strdup(j))) {
714 r = -ENOMEM;
715 goto finish;
716 }
717 } else
718 d = NULL;
719
720 free(chkconfig_description);
721 chkconfig_description = d;
722
723 } else if (startswith_no_case(t, "pidfile:")) {
724
725 char *fn;
726
727 state = NORMAL;
728
729 fn = strstrip(t+8);
730 if (!path_is_absolute(fn)) {
731 log_warning_unit(u->id,
732 "[%s:%u] PID file not absolute. Ignoring.",
733 path, line);
734 continue;
735 }
736
737 if (!(fn = strdup(fn))) {
738 r = -ENOMEM;
739 goto finish;
740 }
741
742 free(s->pid_file);
743 s->pid_file = fn;
744 }
745
746 } else if (state == DESCRIPTION) {
747
748 /* Try to parse Red Hat style description
749 * continuation */
750
751 size_t k = strlen(t);
752 char *j;
753
754 if (t[k-1] == '\\')
755 t[k-1] = 0;
756 else
757 state = NORMAL;
758
759 if ((j = strstrip(t)) && *j) {
760 char *d = NULL;
761
762 if (chkconfig_description)
763 d = strjoin(chkconfig_description, " ", j, NULL);
764 else
765 d = strdup(j);
766
767 if (!d) {
768 r = -ENOMEM;
769 goto finish;
770 }
771
772 free(chkconfig_description);
773 chkconfig_description = d;
774 }
775
776 } else if (state == LSB || state == LSB_DESCRIPTION) {
777
778 if (startswith_no_case(t, "Provides:")) {
779 char *i, *w;
780 size_t z;
781
782 state = LSB;
783
784 FOREACH_WORD_QUOTED(w, z, t+9, i) {
785 char *n, *m;
786
787 if (!(n = strndup(w, z))) {
788 r = -ENOMEM;
789 goto finish;
790 }
791
792 r = sysv_translate_facility(n, basename(path), &m);
793 free(n);
794
795 if (r < 0)
796 goto finish;
797
798 if (r == 0)
799 continue;
800
801 if (unit_name_to_type(m) == UNIT_SERVICE)
802 r = unit_merge_by_name(u, m);
803 else
804 /* NB: SysV targets
805 * which are provided
806 * by a service are
807 * pulled in by the
808 * services, as an
809 * indication that the
810 * generic service is
811 * now available. This
812 * is strictly
813 * one-way. The
814 * targets do NOT pull
815 * in the SysV
816 * services! */
817 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
818
819 if (r < 0)
820 log_error_unit(u->id,
821 "[%s:%u] Failed to add LSB Provides name %s, ignoring: %s",
822 path, line, m, strerror(-r));
823
824 free(m);
825 }
826
827 } else if (startswith_no_case(t, "Required-Start:") ||
828 startswith_no_case(t, "Should-Start:") ||
829 startswith_no_case(t, "X-Start-Before:") ||
830 startswith_no_case(t, "X-Start-After:")) {
831 char *i, *w;
832 size_t z;
833
834 state = LSB;
835
836 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
837 char *n, *m;
838 bool is_before;
839
840 if (!(n = strndup(w, z))) {
841 r = -ENOMEM;
842 goto finish;
843 }
844
845 r = sysv_translate_facility(n, basename(path), &m);
846 if (r < 0) {
847 log_error_unit(u->id,
848 "[%s:%u] Failed to translate LSB dependency %s, ignoring: %s",
849 path, line, n, strerror(-r));
850 free(n);
851 continue;
852 }
853
854 free(n);
855
856 if (r == 0)
857 continue;
858
859 is_before = startswith_no_case(t, "X-Start-Before:");
860
861 if (streq(m, SPECIAL_NETWORK_ONLINE_TARGET) && !is_before)
862 /* the network-online target is special, as it needs to be actively pulled in */
863 r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, m, NULL, true);
864 else
865 r = unit_add_dependency_by_name(u, is_before ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
866
867 if (r < 0)
868 log_error_unit(u->id, "[%s:%u] Failed to add dependency on %s, ignoring: %s",
869 path, line, m, strerror(-r));
870
871 free(m);
872 }
873 } else if (startswith_no_case(t, "Default-Start:")) {
874 char *k, *d;
875
876 state = LSB;
877
878 k = delete_chars(t+14, WHITESPACE "-");
879
880 if (k[0] != 0) {
881 if (!(d = strdup(k))) {
882 r = -ENOMEM;
883 goto finish;
884 }
885
886 free(s->sysv_runlevels);
887 s->sysv_runlevels = d;
888 }
889
890 } else if (startswith_no_case(t, "Description:")) {
891 char *d, *j;
892
893 state = LSB_DESCRIPTION;
894
895 if ((j = strstrip(t+12)) && *j) {
896 if (!(d = strdup(j))) {
897 r = -ENOMEM;
898 goto finish;
899 }
900 } else
901 d = NULL;
902
903 free(long_description);
904 long_description = d;
905
906 } else if (startswith_no_case(t, "Short-Description:")) {
907 char *d, *j;
908
909 state = LSB;
910
911 if ((j = strstrip(t+18)) && *j) {
912 if (!(d = strdup(j))) {
913 r = -ENOMEM;
914 goto finish;
915 }
916 } else
917 d = NULL;
918
919 free(short_description);
920 short_description = d;
921
922 } else if (state == LSB_DESCRIPTION) {
923
924 if (startswith(l, "#\t") || startswith(l, "# ")) {
925 char *j;
926
927 if ((j = strstrip(t)) && *j) {
928 char *d = NULL;
929
930 if (long_description)
931 d = strjoin(long_description, " ", t, NULL);
932 else
933 d = strdup(j);
934
935 if (!d) {
936 r = -ENOMEM;
937 goto finish;
938 }
939
940 free(long_description);
941 long_description = d;
942 }
943
944 } else
945 state = LSB;
946 }
947 }
948 }
949
950 if ((r = sysv_exec_commands(s, supports_reload)) < 0)
951 goto finish;
952
953 if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
954 /* If there a runlevels configured for this service
955 * but none of the standard ones, then we assume this
956 * is some special kind of service (which might be
957 * needed for early boot) and don't create any links
958 * to it. */
959
960 UNIT(s)->default_dependencies = false;
961
962 /* Don't timeout special services during boot (like fsck) */
963 s->timeout_start_usec = 0;
964 s->timeout_stop_usec = 0;
965 } else {
966 s->timeout_start_usec = DEFAULT_SYSV_TIMEOUT_USEC;
967 s->timeout_stop_usec = DEFAULT_SYSV_TIMEOUT_USEC;
968 }
969
970 /* Special setting for all SysV services */
971 s->type = SERVICE_FORKING;
972 s->remain_after_exit = !s->pid_file;
973 s->guess_main_pid = false;
974 s->restart = SERVICE_RESTART_NO;
975 s->exec_context.ignore_sigpipe = false;
976 s->kill_context.kill_mode = KILL_PROCESS;
977
978 /* We use the long description only if
979 * no short description is set. */
980
981 if (short_description)
982 description = short_description;
983 else if (chkconfig_description)
984 description = chkconfig_description;
985 else if (long_description)
986 description = long_description;
987 else
988 description = NULL;
989
990 if (description) {
991 char *d;
992
993 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
994 r = -ENOMEM;
995 goto finish;
996 }
997
998 u->description = d;
999 }
1000
1001 /* Initialize the start priority from what has been set in the
1002 * /etc/rcN.d/ hierarchies if we load the unit file as SysV
1003 * init script. */
1004 if (s->sysv_start_priority_from_rcnd >= 0)
1005 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
1006
1007 u->load_state = UNIT_LOADED;
1008 r = 0;
1009
1010 finish:
1011
1012 if (f)
1013 fclose(f);
1014
1015 free(short_description);
1016 free(long_description);
1017 free(chkconfig_description);
1018
1019 return r;
1020 }
1021
1022 static int service_load_sysv_name(Service *s, const char *name) {
1023 char **p;
1024
1025 assert(s);
1026 assert(name);
1027
1028 /* For SysV services we strip the *.sh suffixes. */
1029 if (endswith(name, ".sh.service"))
1030 return -ENOENT;
1031
1032 STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
1033 char *path;
1034 int r;
1035
1036 path = strjoin(*p, "/", name, NULL);
1037 if (!path)
1038 return -ENOMEM;
1039
1040 assert(endswith(path, ".service"));
1041 path[strlen(path)-8] = 0;
1042
1043 r = service_load_sysv_path(s, path);
1044
1045 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1046 /* Try *.sh source'able init scripts */
1047 strcat(path, ".sh");
1048 r = service_load_sysv_path(s, path);
1049 }
1050 free(path);
1051
1052 if (r < 0)
1053 return r;
1054
1055 if (UNIT(s)->load_state != UNIT_STUB)
1056 break;
1057 }
1058
1059 return 0;
1060 }
1061
1062 static int service_load_sysv(Service *s) {
1063 const char *t;
1064 Iterator i;
1065 int r;
1066
1067 assert(s);
1068
1069 /* Load service data from SysV init scripts, preferably with
1070 * LSB headers ... */
1071
1072 if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1073 return 0;
1074
1075 if ((t = UNIT(s)->id))
1076 if ((r = service_load_sysv_name(s, t)) < 0)
1077 return r;
1078
1079 if (UNIT(s)->load_state == UNIT_STUB)
1080 SET_FOREACH(t, UNIT(s)->names, i) {
1081 if (t == UNIT(s)->id)
1082 continue;
1083
1084 if ((r = service_load_sysv_name(s, t)) < 0)
1085 return r;
1086
1087 if (UNIT(s)->load_state != UNIT_STUB)
1088 break;
1089 }
1090
1091 return 0;
1092 }
1093 #endif
1094
1095 static int service_verify(Service *s) {
1096 assert(s);
1097
1098 if (UNIT(s)->load_state != UNIT_LOADED)
1099 return 0;
1100
1101 if (!s->exec_command[SERVICE_EXEC_START]) {
1102 log_error_unit(UNIT(s)->id, "%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1103 return -EINVAL;
1104 }
1105
1106 if (s->type != SERVICE_ONESHOT &&
1107 s->exec_command[SERVICE_EXEC_START]->command_next) {
1108 log_error_unit(UNIT(s)->id, "%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1109 return -EINVAL;
1110 }
1111
1112 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
1113 log_error_unit(UNIT(s)->id, "%s has Restart setting other than no, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1114 return -EINVAL;
1115 }
1116
1117 if (s->type == SERVICE_DBUS && !s->bus_name) {
1118 log_error_unit(UNIT(s)->id, "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1119 return -EINVAL;
1120 }
1121
1122 if (s->bus_name && s->type != SERVICE_DBUS)
1123 log_warning_unit(UNIT(s)->id, "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
1124
1125 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
1126 log_error_unit(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.", UNIT(s)->id);
1127 return -EINVAL;
1128 }
1129
1130 return 0;
1131 }
1132
1133 static int service_add_default_dependencies(Service *s) {
1134 int r;
1135
1136 assert(s);
1137
1138 /* Add a number of automatic dependencies useful for the
1139 * majority of services. */
1140
1141 /* First, pull in base system */
1142 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1143 SPECIAL_BASIC_TARGET, NULL, true);
1144 if (r < 0)
1145 return r;
1146
1147 /* Second, activate normal shutdown */
1148 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS,
1149 SPECIAL_SHUTDOWN_TARGET, NULL, true);
1150 return r;
1151 }
1152
1153 static void service_fix_output(Service *s) {
1154 assert(s);
1155
1156 /* If nothing has been explicitly configured, patch default
1157 * output in. If input is socket/tty we avoid this however,
1158 * since in that case we want output to default to the same
1159 * place as we read input from. */
1160
1161 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1162 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1163 s->exec_context.std_input == EXEC_INPUT_NULL)
1164 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1165
1166 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1167 s->exec_context.std_input == EXEC_INPUT_NULL)
1168 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1169 }
1170
1171 static int service_load(Unit *u) {
1172 int r;
1173 Service *s = SERVICE(u);
1174
1175 assert(s);
1176
1177 /* Load a .service file */
1178 r = unit_load_fragment(u);
1179 if (r < 0)
1180 return r;
1181
1182 #ifdef HAVE_SYSV_COMPAT
1183 /* Load a classic init script as a fallback, if we couldn't find anything */
1184 if (u->load_state == UNIT_STUB) {
1185 r = service_load_sysv(s);
1186 if (r < 0)
1187 return r;
1188 }
1189 #endif
1190
1191 /* Still nothing found? Then let's give up */
1192 if (u->load_state == UNIT_STUB)
1193 return -ENOENT;
1194
1195 /* This is a new unit? Then let's add in some extras */
1196 if (u->load_state == UNIT_LOADED) {
1197
1198 /* We were able to load something, then let's add in
1199 * the dropin directories. */
1200 r = unit_load_dropin(u);
1201 if (r < 0)
1202 return r;
1203
1204 if (s->type == _SERVICE_TYPE_INVALID)
1205 s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
1206
1207 /* Oneshot services have disabled start timeout by default */
1208 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
1209 s->timeout_start_usec = 0;
1210
1211 service_fix_output(s);
1212
1213 r = unit_patch_contexts(u);
1214 if (r < 0)
1215 return r;
1216
1217 r = unit_add_exec_dependencies(u, &s->exec_context);
1218 if (r < 0)
1219 return r;
1220
1221 r = unit_add_default_slice(u, &s->cgroup_context);
1222 if (r < 0)
1223 return r;
1224
1225 #ifdef HAVE_SYSV_COMPAT
1226 r = sysv_fix_order(s);
1227 if (r < 0)
1228 return r;
1229 #endif
1230
1231 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1232 s->notify_access = NOTIFY_MAIN;
1233
1234 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1235 s->notify_access = NOTIFY_MAIN;
1236
1237 if (s->bus_name) {
1238 r = unit_watch_bus_name(u, s->bus_name);
1239 if (r < 0)
1240 return r;
1241 }
1242
1243 if (u->default_dependencies) {
1244 r = service_add_default_dependencies(s);
1245 if (r < 0)
1246 return r;
1247 }
1248 }
1249
1250 return service_verify(s);
1251 }
1252
1253 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1254
1255 ServiceExecCommand c;
1256 Service *s = SERVICE(u);
1257 const char *prefix2;
1258 _cleanup_free_ char *p2 = NULL;
1259
1260 assert(s);
1261
1262 p2 = strappend(prefix, "\t");
1263 prefix2 = p2 ? p2 : prefix;
1264
1265 fprintf(f,
1266 "%sService State: %s\n"
1267 "%sResult: %s\n"
1268 "%sReload Result: %s\n"
1269 "%sPermissionsStartOnly: %s\n"
1270 "%sRootDirectoryStartOnly: %s\n"
1271 "%sRemainAfterExit: %s\n"
1272 "%sGuessMainPID: %s\n"
1273 "%sType: %s\n"
1274 "%sRestart: %s\n"
1275 "%sNotifyAccess: %s\n",
1276 prefix, service_state_to_string(s->state),
1277 prefix, service_result_to_string(s->result),
1278 prefix, service_result_to_string(s->reload_result),
1279 prefix, yes_no(s->permissions_start_only),
1280 prefix, yes_no(s->root_directory_start_only),
1281 prefix, yes_no(s->remain_after_exit),
1282 prefix, yes_no(s->guess_main_pid),
1283 prefix, service_type_to_string(s->type),
1284 prefix, service_restart_to_string(s->restart),
1285 prefix, notify_access_to_string(s->notify_access));
1286
1287 if (s->control_pid > 0)
1288 fprintf(f,
1289 "%sControl PID: "PID_FMT"\n",
1290 prefix, s->control_pid);
1291
1292 if (s->main_pid > 0)
1293 fprintf(f,
1294 "%sMain PID: "PID_FMT"\n"
1295 "%sMain PID Known: %s\n"
1296 "%sMain PID Alien: %s\n",
1297 prefix, s->main_pid,
1298 prefix, yes_no(s->main_pid_known),
1299 prefix, yes_no(s->main_pid_alien));
1300
1301 if (s->pid_file)
1302 fprintf(f,
1303 "%sPIDFile: %s\n",
1304 prefix, s->pid_file);
1305
1306 if (s->bus_name)
1307 fprintf(f,
1308 "%sBusName: %s\n"
1309 "%sBus Name Good: %s\n",
1310 prefix, s->bus_name,
1311 prefix, yes_no(s->bus_name_good));
1312
1313 kill_context_dump(&s->kill_context, f, prefix);
1314 exec_context_dump(&s->exec_context, f, prefix);
1315
1316 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1317
1318 if (!s->exec_command[c])
1319 continue;
1320
1321 fprintf(f, "%s-> %s:\n",
1322 prefix, service_exec_command_to_string(c));
1323
1324 exec_command_dump_list(s->exec_command[c], f, prefix2);
1325 }
1326
1327 #ifdef HAVE_SYSV_COMPAT
1328 if (s->is_sysv)
1329 fprintf(f,
1330 "%sSysV Init Script has LSB Header: %s\n"
1331 "%sSysVEnabled: %s\n",
1332 prefix, yes_no(s->sysv_has_lsb),
1333 prefix, yes_no(s->sysv_enabled));
1334
1335 if (s->sysv_start_priority >= 0)
1336 fprintf(f,
1337 "%sSysVStartPriority: %i\n",
1338 prefix, s->sysv_start_priority);
1339
1340 if (s->sysv_runlevels)
1341 fprintf(f, "%sSysVRunLevels: %s\n",
1342 prefix, s->sysv_runlevels);
1343 #endif
1344
1345 if (s->status_text)
1346 fprintf(f, "%sStatus Text: %s\n",
1347 prefix, s->status_text);
1348 }
1349
1350 static int service_load_pid_file(Service *s, bool may_warn) {
1351 _cleanup_free_ char *k = NULL;
1352 int r;
1353 pid_t pid;
1354
1355 assert(s);
1356
1357 if (!s->pid_file)
1358 return -ENOENT;
1359
1360 r = read_one_line_file(s->pid_file, &k);
1361 if (r < 0) {
1362 if (may_warn)
1363 log_info_unit(UNIT(s)->id,
1364 "PID file %s not readable (yet?) after %s.",
1365 s->pid_file, service_state_to_string(s->state));
1366 return r;
1367 }
1368
1369 r = parse_pid(k, &pid);
1370 if (r < 0) {
1371 if (may_warn)
1372 log_info_unit(UNIT(s)->id,
1373 "Failed to read PID from file %s: %s",
1374 s->pid_file, strerror(-r));
1375 return r;
1376 }
1377
1378 if (!pid_is_alive(pid)) {
1379 if (may_warn)
1380 log_info_unit(UNIT(s)->id, "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
1381
1382 return -ESRCH;
1383 }
1384
1385 if (s->main_pid_known) {
1386 if (pid == s->main_pid)
1387 return 0;
1388
1389 log_debug_unit(UNIT(s)->id,
1390 "Main PID changing: "PID_FMT" -> "PID_FMT,
1391 s->main_pid, pid);
1392 service_unwatch_main_pid(s);
1393 s->main_pid_known = false;
1394 } else
1395 log_debug_unit(UNIT(s)->id,
1396 "Main PID loaded: "PID_FMT, pid);
1397
1398 r = service_set_main_pid(s, pid);
1399 if (r < 0)
1400 return r;
1401
1402 r = unit_watch_pid(UNIT(s), pid);
1403 if (r < 0) {
1404 /* FIXME: we need to do something here */
1405 log_warning_unit(UNIT(s)->id,
1406 "Failed to watch PID "PID_FMT" from service %s",
1407 pid, UNIT(s)->id);
1408 return r;
1409 }
1410
1411 return 0;
1412 }
1413
1414 static int service_search_main_pid(Service *s) {
1415 pid_t pid;
1416 int r;
1417
1418 assert(s);
1419
1420 /* If we know it anyway, don't ever fallback to unreliable
1421 * heuristics */
1422 if (s->main_pid_known)
1423 return 0;
1424
1425 if (!s->guess_main_pid)
1426 return 0;
1427
1428 assert(s->main_pid <= 0);
1429
1430 pid = unit_search_main_pid(UNIT(s));
1431 if (pid <= 0)
1432 return -ENOENT;
1433
1434 log_debug_unit(UNIT(s)->id,
1435 "Main PID guessed: "PID_FMT, pid);
1436 r = service_set_main_pid(s, pid);
1437 if (r < 0)
1438 return r;
1439
1440 r = unit_watch_pid(UNIT(s), pid);
1441 if (r < 0)
1442 /* FIXME: we need to do something here */
1443 log_warning_unit(UNIT(s)->id,
1444 "Failed to watch PID "PID_FMT" from service %s",
1445 pid, UNIT(s)->id);
1446 return r;
1447 }
1448
1449 static void service_set_state(Service *s, ServiceState state) {
1450 ServiceState old_state;
1451 const UnitActiveState *table;
1452
1453 assert(s);
1454
1455 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1456
1457 old_state = s->state;
1458 s->state = state;
1459
1460 service_unwatch_pid_file(s);
1461
1462 if (!IN_SET(state,
1463 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1464 SERVICE_RELOAD,
1465 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1466 SERVICE_STOP_POST,
1467 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
1468 SERVICE_AUTO_RESTART))
1469 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1470
1471 if (!IN_SET(state,
1472 SERVICE_START, SERVICE_START_POST,
1473 SERVICE_RUNNING, SERVICE_RELOAD,
1474 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1475 SERVICE_STOP_POST,
1476 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1477 service_unwatch_main_pid(s);
1478 s->main_command = NULL;
1479 }
1480
1481 if (!IN_SET(state,
1482 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1483 SERVICE_RELOAD,
1484 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1485 SERVICE_STOP_POST,
1486 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1487 service_unwatch_control_pid(s);
1488 s->control_command = NULL;
1489 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1490 }
1491
1492 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1493 unit_unwatch_all_pids(UNIT(s));
1494
1495 if (!IN_SET(state,
1496 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1497 SERVICE_RUNNING, SERVICE_RELOAD,
1498 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1499 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
1500 !(state == SERVICE_DEAD && UNIT(s)->job)) {
1501 service_close_socket_fd(s);
1502 service_connection_unref(s);
1503 }
1504
1505 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1506 service_stop_watchdog(s);
1507
1508 /* For the inactive states unit_notify() will trim the cgroup,
1509 * but for exit we have to do that ourselves... */
1510 if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1511 unit_destroy_cgroup(UNIT(s));
1512
1513 /* For remain_after_exit services, let's see if we can "release" the
1514 * hold on the console, since unit_notify() only does that in case of
1515 * change of state */
1516 if (state == SERVICE_EXITED && s->remain_after_exit &&
1517 UNIT(s)->manager->n_on_console > 0) {
1518 ExecContext *ec = unit_get_exec_context(UNIT(s));
1519 if (ec && exec_context_may_touch_console(ec)) {
1520 Manager *m = UNIT(s)->manager;
1521
1522 m->n_on_console --;
1523 if (m->n_on_console == 0)
1524 /* unset no_console_output flag, since the console is free */
1525 m->no_console_output = false;
1526 }
1527 }
1528
1529 if (old_state != state)
1530 log_debug_unit(UNIT(s)->id, "%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
1531
1532 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1533 s->reload_result = SERVICE_SUCCESS;
1534 }
1535
1536 static int service_coldplug(Unit *u) {
1537 Service *s = SERVICE(u);
1538 int r;
1539
1540 assert(s);
1541 assert(s->state == SERVICE_DEAD);
1542
1543 if (s->deserialized_state != s->state) {
1544
1545 if (IN_SET(s->deserialized_state,
1546 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1547 SERVICE_RELOAD,
1548 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1549 SERVICE_STOP_POST,
1550 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1551
1552 usec_t k;
1553
1554 k = IN_SET(s->deserialized_state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec;
1555
1556 /* For the start/stop timeouts 0 means off */
1557 if (k > 0) {
1558 r = service_arm_timer(s, k);
1559 if (r < 0)
1560 return r;
1561 }
1562 }
1563
1564 if (s->deserialized_state == SERVICE_AUTO_RESTART) {
1565
1566 /* The restart timeouts 0 means immediately */
1567 r = service_arm_timer(s, s->restart_usec);
1568 if (r < 0)
1569 return r;
1570 }
1571
1572 if (pid_is_unwaited(s->main_pid) &&
1573 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
1574 IN_SET(s->deserialized_state,
1575 SERVICE_START, SERVICE_START_POST,
1576 SERVICE_RUNNING, SERVICE_RELOAD,
1577 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1578 SERVICE_STOP_POST,
1579 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1580 r = unit_watch_pid(UNIT(s), s->main_pid);
1581 if (r < 0)
1582 return r;
1583 }
1584
1585 if (pid_is_unwaited(s->control_pid) &&
1586 IN_SET(s->deserialized_state,
1587 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1588 SERVICE_RELOAD,
1589 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1590 SERVICE_STOP_POST,
1591 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1592 r = unit_watch_pid(UNIT(s), s->control_pid);
1593 if (r < 0)
1594 return r;
1595 }
1596
1597 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1598 unit_watch_all_pids(UNIT(s));
1599
1600 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1601 service_start_watchdog(s);
1602
1603 service_set_state(s, s->deserialized_state);
1604 }
1605
1606 return 0;
1607 }
1608
1609 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1610 Iterator i;
1611 int r;
1612 int *rfds = NULL;
1613 unsigned rn_fds = 0;
1614 Unit *u;
1615
1616 assert(s);
1617 assert(fds);
1618 assert(n_fds);
1619
1620 if (s->socket_fd >= 0)
1621 return 0;
1622
1623 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1624 int *cfds;
1625 unsigned cn_fds;
1626 Socket *sock;
1627
1628 if (u->type != UNIT_SOCKET)
1629 continue;
1630
1631 sock = SOCKET(u);
1632
1633 r = socket_collect_fds(sock, &cfds, &cn_fds);
1634 if (r < 0)
1635 goto fail;
1636
1637 if (!cfds)
1638 continue;
1639
1640 if (!rfds) {
1641 rfds = cfds;
1642 rn_fds = cn_fds;
1643 } else {
1644 int *t;
1645
1646 t = new(int, rn_fds+cn_fds);
1647 if (!t) {
1648 free(cfds);
1649 r = -ENOMEM;
1650 goto fail;
1651 }
1652
1653 memcpy(t, rfds, rn_fds * sizeof(int));
1654 memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1655 free(rfds);
1656 free(cfds);
1657
1658 rfds = t;
1659 rn_fds = rn_fds+cn_fds;
1660 }
1661 }
1662
1663 *fds = rfds;
1664 *n_fds = rn_fds;
1665
1666 return 0;
1667
1668 fail:
1669 free(rfds);
1670
1671 return r;
1672 }
1673
1674 static int service_spawn(
1675 Service *s,
1676 ExecCommand *c,
1677 bool timeout,
1678 bool pass_fds,
1679 bool apply_permissions,
1680 bool apply_chroot,
1681 bool apply_tty_stdin,
1682 bool set_notify_socket,
1683 bool is_control,
1684 pid_t *_pid) {
1685
1686 pid_t pid;
1687 int r;
1688 int *fds = NULL;
1689 _cleanup_free_ int *fdsbuf = NULL;
1690 unsigned n_fds = 0, n_env = 0;
1691 _cleanup_strv_free_ char
1692 **argv = NULL, **final_env = NULL, **our_env = NULL;
1693 const char *path;
1694
1695 assert(s);
1696 assert(c);
1697 assert(_pid);
1698
1699 unit_realize_cgroup(UNIT(s));
1700
1701 r = unit_setup_exec_runtime(UNIT(s));
1702 if (r < 0)
1703 goto fail;
1704
1705 if (pass_fds ||
1706 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1707 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1708 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1709
1710 if (s->socket_fd >= 0) {
1711 fds = &s->socket_fd;
1712 n_fds = 1;
1713 } else {
1714 r = service_collect_fds(s, &fdsbuf, &n_fds);
1715 if (r < 0)
1716 goto fail;
1717
1718 fds = fdsbuf;
1719 }
1720 }
1721
1722 if (timeout && s->timeout_start_usec > 0) {
1723 r = service_arm_timer(s, s->timeout_start_usec);
1724 if (r < 0)
1725 goto fail;
1726 } else
1727 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1728
1729 r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
1730 if (r < 0)
1731 goto fail;
1732
1733 our_env = new0(char*, 4);
1734 if (!our_env) {
1735 r = -ENOMEM;
1736 goto fail;
1737 }
1738
1739 if (set_notify_socket)
1740 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1741 r = -ENOMEM;
1742 goto fail;
1743 }
1744
1745 if (s->main_pid > 0)
1746 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0) {
1747 r = -ENOMEM;
1748 goto fail;
1749 }
1750
1751 if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
1752 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0) {
1753 r = -ENOMEM;
1754 goto fail;
1755 }
1756
1757 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1758 if (!final_env) {
1759 r = -ENOMEM;
1760 goto fail;
1761 }
1762
1763 if (is_control && UNIT(s)->cgroup_path) {
1764 path = strappenda(UNIT(s)->cgroup_path, "/control");
1765 cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1766 } else
1767 path = UNIT(s)->cgroup_path;
1768
1769 r = exec_spawn(c,
1770 argv,
1771 &s->exec_context,
1772 fds, n_fds,
1773 final_env,
1774 apply_permissions,
1775 apply_chroot,
1776 apply_tty_stdin,
1777 UNIT(s)->manager->confirm_spawn,
1778 UNIT(s)->manager->cgroup_supported,
1779 path,
1780 manager_get_runtime_prefix(UNIT(s)->manager),
1781 UNIT(s)->id,
1782 s->watchdog_usec,
1783 s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
1784 s->exec_runtime,
1785 &pid);
1786 if (r < 0)
1787 goto fail;
1788
1789 r = unit_watch_pid(UNIT(s), pid);
1790 if (r < 0)
1791 /* FIXME: we need to do something here */
1792 goto fail;
1793
1794 *_pid = pid;
1795
1796 return 0;
1797
1798 fail:
1799 if (timeout)
1800 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1801
1802 return r;
1803 }
1804
1805 static int main_pid_good(Service *s) {
1806 assert(s);
1807
1808 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1809 * don't know */
1810
1811 /* If we know the pid file, then lets just check if it is
1812 * still valid */
1813 if (s->main_pid_known) {
1814
1815 /* If it's an alien child let's check if it is still
1816 * alive ... */
1817 if (s->main_pid_alien && s->main_pid > 0)
1818 return pid_is_alive(s->main_pid);
1819
1820 /* .. otherwise assume we'll get a SIGCHLD for it,
1821 * which we really should wait for to collect exit
1822 * status and code */
1823 return s->main_pid > 0;
1824 }
1825
1826 /* We don't know the pid */
1827 return -EAGAIN;
1828 }
1829
1830 _pure_ static int control_pid_good(Service *s) {
1831 assert(s);
1832
1833 return s->control_pid > 0;
1834 }
1835
1836 static int cgroup_good(Service *s) {
1837 int r;
1838
1839 assert(s);
1840
1841 if (!UNIT(s)->cgroup_path)
1842 return 0;
1843
1844 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
1845 if (r < 0)
1846 return r;
1847
1848 return !r;
1849 }
1850
1851 static int service_execute_action(Service *s, FailureAction action, const char *reason, bool log_action_none);
1852
1853 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1854 int r;
1855 assert(s);
1856
1857 if (f != SERVICE_SUCCESS)
1858 s->result = f;
1859
1860 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1861
1862 if (s->result != SERVICE_SUCCESS)
1863 service_execute_action(s, s->failure_action, "failed", false);
1864
1865 if (allow_restart &&
1866 !s->forbid_restart &&
1867 (s->restart == SERVICE_RESTART_ALWAYS ||
1868 (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1869 (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1870 (s->restart == SERVICE_RESTART_ON_ABNORMAL && !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE)) ||
1871 (s->restart == SERVICE_RESTART_ON_WATCHDOG && s->result == SERVICE_FAILURE_WATCHDOG) ||
1872 (s->restart == SERVICE_RESTART_ON_ABORT && IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP))) &&
1873 (s->result != SERVICE_FAILURE_EXIT_CODE ||
1874 !set_contains(s->restart_ignore_status.code, INT_TO_PTR(s->main_exec_status.status))) &&
1875 (s->result != SERVICE_FAILURE_SIGNAL ||
1876 !set_contains(s->restart_ignore_status.signal, INT_TO_PTR(s->main_exec_status.status)))) {
1877
1878 r = service_arm_timer(s, s->restart_usec);
1879 if (r < 0)
1880 goto fail;
1881
1882 service_set_state(s, SERVICE_AUTO_RESTART);
1883 }
1884
1885 s->forbid_restart = false;
1886
1887 /* We want fresh tmpdirs in case service is started again immediately */
1888 exec_runtime_destroy(s->exec_runtime);
1889 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1890
1891 /* Also, remove the runtime directory in */
1892 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1893
1894 /* Try to delete the pid file. At this point it will be
1895 * out-of-date, and some software might be confused by it, so
1896 * let's remove it. */
1897 if (s->pid_file)
1898 unlink_noerrno(s->pid_file);
1899
1900 return;
1901
1902 fail:
1903 log_warning_unit(UNIT(s)->id,
1904 "%s failed to run install restart timer: %s",
1905 UNIT(s)->id, strerror(-r));
1906 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1907 }
1908
1909 static void service_enter_stop_post(Service *s, ServiceResult f) {
1910 int r;
1911 assert(s);
1912
1913 if (f != SERVICE_SUCCESS)
1914 s->result = f;
1915
1916 service_unwatch_control_pid(s);
1917 unit_watch_all_pids(UNIT(s));
1918
1919 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1920 if (s->control_command) {
1921 s->control_command_id = SERVICE_EXEC_STOP_POST;
1922
1923 r = service_spawn(s,
1924 s->control_command,
1925 true,
1926 false,
1927 !s->permissions_start_only,
1928 !s->root_directory_start_only,
1929 true,
1930 false,
1931 true,
1932 &s->control_pid);
1933 if (r < 0)
1934 goto fail;
1935
1936 service_set_state(s, SERVICE_STOP_POST);
1937 } else
1938 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1939
1940 return;
1941
1942 fail:
1943 log_warning_unit(UNIT(s)->id,
1944 "%s failed to run 'stop-post' task: %s",
1945 UNIT(s)->id, strerror(-r));
1946 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1947 }
1948
1949 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1950 int r;
1951
1952 assert(s);
1953
1954 if (f != SERVICE_SUCCESS)
1955 s->result = f;
1956
1957 unit_watch_all_pids(UNIT(s));
1958
1959 r = unit_kill_context(
1960 UNIT(s),
1961 &s->kill_context,
1962 state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM,
1963 s->main_pid,
1964 s->control_pid,
1965 s->main_pid_alien);
1966
1967 if (r < 0)
1968 goto fail;
1969
1970 if (r > 0) {
1971 if (s->timeout_stop_usec > 0) {
1972 r = service_arm_timer(s, s->timeout_stop_usec);
1973 if (r < 0)
1974 goto fail;
1975 }
1976
1977 service_set_state(s, state);
1978 } else if (state == SERVICE_STOP_SIGTERM)
1979 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1980 else if (state == SERVICE_STOP_SIGKILL)
1981 service_enter_stop_post(s, SERVICE_SUCCESS);
1982 else if (state == SERVICE_FINAL_SIGTERM)
1983 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1984 else
1985 service_enter_dead(s, SERVICE_SUCCESS, true);
1986
1987 return;
1988
1989 fail:
1990 log_warning_unit(UNIT(s)->id,
1991 "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1992
1993 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1994 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1995 else
1996 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1997 }
1998
1999 static void service_enter_stop(Service *s, ServiceResult f) {
2000 int r;
2001
2002 assert(s);
2003
2004 if (f != SERVICE_SUCCESS)
2005 s->result = f;
2006
2007 service_unwatch_control_pid(s);
2008 unit_watch_all_pids(UNIT(s));
2009
2010 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
2011 if (s->control_command) {
2012 s->control_command_id = SERVICE_EXEC_STOP;
2013
2014 r = service_spawn(s,
2015 s->control_command,
2016 true,
2017 false,
2018 !s->permissions_start_only,
2019 !s->root_directory_start_only,
2020 false,
2021 false,
2022 true,
2023 &s->control_pid);
2024 if (r < 0)
2025 goto fail;
2026
2027 service_set_state(s, SERVICE_STOP);
2028 } else
2029 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2030
2031 return;
2032
2033 fail:
2034 log_warning_unit(UNIT(s)->id,
2035 "%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2036 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2037 }
2038
2039 static void service_enter_running(Service *s, ServiceResult f) {
2040 int main_pid_ok, cgroup_ok;
2041 assert(s);
2042
2043 if (f != SERVICE_SUCCESS)
2044 s->result = f;
2045
2046 main_pid_ok = main_pid_good(s);
2047 cgroup_ok = cgroup_good(s);
2048
2049 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2050 (s->bus_name_good || s->type != SERVICE_DBUS))
2051 service_set_state(s, SERVICE_RUNNING);
2052 else if (s->remain_after_exit)
2053 service_set_state(s, SERVICE_EXITED);
2054 else
2055 service_enter_stop(s, SERVICE_SUCCESS);
2056 }
2057
2058 static void service_enter_start_post(Service *s) {
2059 int r;
2060 assert(s);
2061
2062 service_unwatch_control_pid(s);
2063 service_reset_watchdog(s);
2064
2065 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
2066 if (s->control_command) {
2067 s->control_command_id = SERVICE_EXEC_START_POST;
2068
2069 r = service_spawn(s,
2070 s->control_command,
2071 true,
2072 false,
2073 !s->permissions_start_only,
2074 !s->root_directory_start_only,
2075 false,
2076 false,
2077 true,
2078 &s->control_pid);
2079 if (r < 0)
2080 goto fail;
2081
2082 service_set_state(s, SERVICE_START_POST);
2083 } else
2084 service_enter_running(s, SERVICE_SUCCESS);
2085
2086 return;
2087
2088 fail:
2089 log_warning_unit(UNIT(s)->id,
2090 "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2091 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2092 }
2093
2094 static void service_kill_control_processes(Service *s) {
2095 char *p;
2096
2097 if (!UNIT(s)->cgroup_path)
2098 return;
2099
2100 p = strappenda(UNIT(s)->cgroup_path, "/control");
2101 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL);
2102 }
2103
2104 static void service_enter_start(Service *s) {
2105 ExecCommand *c;
2106 pid_t pid;
2107 int r;
2108
2109 assert(s);
2110
2111 assert(s->exec_command[SERVICE_EXEC_START]);
2112 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2113
2114 service_unwatch_control_pid(s);
2115 service_unwatch_main_pid(s);
2116
2117 /* We want to ensure that nobody leaks processes from
2118 * START_PRE here, so let's go on a killing spree, People
2119 * should not spawn long running processes from START_PRE. */
2120 service_kill_control_processes(s);
2121
2122 if (s->type == SERVICE_FORKING) {
2123 s->control_command_id = SERVICE_EXEC_START;
2124 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2125
2126 s->main_command = NULL;
2127 } else {
2128 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2129 s->control_command = NULL;
2130
2131 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2132 }
2133
2134 r = service_spawn(s,
2135 c,
2136 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS ||
2137 s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
2138 true,
2139 true,
2140 true,
2141 true,
2142 s->notify_access != NOTIFY_NONE,
2143 false,
2144 &pid);
2145 if (r < 0)
2146 goto fail;
2147
2148 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
2149 /* For simple services we immediately start
2150 * the START_POST binaries. */
2151
2152 service_set_main_pid(s, pid);
2153 service_enter_start_post(s);
2154
2155 } else if (s->type == SERVICE_FORKING) {
2156
2157 /* For forking services we wait until the start
2158 * process exited. */
2159
2160 s->control_pid = pid;
2161 service_set_state(s, SERVICE_START);
2162
2163 } else if (s->type == SERVICE_ONESHOT ||
2164 s->type == SERVICE_DBUS ||
2165 s->type == SERVICE_NOTIFY) {
2166
2167 /* For oneshot services we wait until the start
2168 * process exited, too, but it is our main process. */
2169
2170 /* For D-Bus services we know the main pid right away,
2171 * but wait for the bus name to appear on the
2172 * bus. Notify services are similar. */
2173
2174 service_set_main_pid(s, pid);
2175 service_set_state(s, SERVICE_START);
2176 } else
2177 assert_not_reached("Unknown service type");
2178
2179 return;
2180
2181 fail:
2182 log_warning_unit(UNIT(s)->id,
2183 "%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2184 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2185 }
2186
2187 static void service_enter_start_pre(Service *s) {
2188 int r;
2189
2190 assert(s);
2191
2192 service_unwatch_control_pid(s);
2193
2194 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
2195 if (s->control_command) {
2196 /* Before we start anything, let's clear up what might
2197 * be left from previous runs. */
2198 service_kill_control_processes(s);
2199
2200 s->control_command_id = SERVICE_EXEC_START_PRE;
2201
2202 r = service_spawn(s,
2203 s->control_command,
2204 true,
2205 false,
2206 !s->permissions_start_only,
2207 !s->root_directory_start_only,
2208 true,
2209 false,
2210 true,
2211 &s->control_pid);
2212 if (r < 0)
2213 goto fail;
2214
2215 service_set_state(s, SERVICE_START_PRE);
2216 } else
2217 service_enter_start(s);
2218
2219 return;
2220
2221 fail:
2222 log_warning_unit(UNIT(s)->id,
2223 "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2224 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2225 }
2226
2227 static void service_enter_restart(Service *s) {
2228 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
2229 int r;
2230
2231 assert(s);
2232
2233 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2234 /* Don't restart things if we are going down anyway */
2235 log_info_unit(UNIT(s)->id,
2236 "Stop job pending for unit, delaying automatic restart.");
2237
2238 r = service_arm_timer(s, s->restart_usec);
2239 if (r < 0)
2240 goto fail;
2241
2242 return;
2243 }
2244
2245 /* Any units that are bound to this service must also be
2246 * restarted. We use JOB_RESTART (instead of the more obvious
2247 * JOB_START) here so that those dependency jobs will be added
2248 * as well. */
2249 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
2250 if (r < 0)
2251 goto fail;
2252
2253 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2254 * it will be canceled as part of the service_stop() call that
2255 * is executed as part of JOB_RESTART. */
2256
2257 log_debug_unit(UNIT(s)->id,
2258 "%s scheduled restart job.", UNIT(s)->id);
2259 return;
2260
2261 fail:
2262 log_warning_unit(UNIT(s)->id,
2263 "%s failed to schedule restart job: %s",
2264 UNIT(s)->id, bus_error_message(&error, -r));
2265 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2266 }
2267
2268 static void service_enter_reload(Service *s) {
2269 int r;
2270
2271 assert(s);
2272
2273 service_unwatch_control_pid(s);
2274
2275 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2276 if (s->control_command) {
2277 s->control_command_id = SERVICE_EXEC_RELOAD;
2278
2279 r = service_spawn(s,
2280 s->control_command,
2281 true,
2282 false,
2283 !s->permissions_start_only,
2284 !s->root_directory_start_only,
2285 false,
2286 false,
2287 true,
2288 &s->control_pid);
2289 if (r < 0)
2290 goto fail;
2291
2292 service_set_state(s, SERVICE_RELOAD);
2293 } else
2294 service_enter_running(s, SERVICE_SUCCESS);
2295
2296 return;
2297
2298 fail:
2299 log_warning_unit(UNIT(s)->id,
2300 "%s failed to run 'reload' task: %s",
2301 UNIT(s)->id, strerror(-r));
2302 s->reload_result = SERVICE_FAILURE_RESOURCES;
2303 service_enter_running(s, SERVICE_SUCCESS);
2304 }
2305
2306 static void service_run_next_control(Service *s) {
2307 int r;
2308
2309 assert(s);
2310 assert(s->control_command);
2311 assert(s->control_command->command_next);
2312
2313 assert(s->control_command_id != SERVICE_EXEC_START);
2314
2315 s->control_command = s->control_command->command_next;
2316 service_unwatch_control_pid(s);
2317
2318 r = service_spawn(s,
2319 s->control_command,
2320 true,
2321 false,
2322 !s->permissions_start_only,
2323 !s->root_directory_start_only,
2324 s->control_command_id == SERVICE_EXEC_START_PRE ||
2325 s->control_command_id == SERVICE_EXEC_STOP_POST,
2326 false,
2327 true,
2328 &s->control_pid);
2329 if (r < 0)
2330 goto fail;
2331
2332 return;
2333
2334 fail:
2335 log_warning_unit(UNIT(s)->id,
2336 "%s failed to run next control task: %s",
2337 UNIT(s)->id, strerror(-r));
2338
2339 if (s->state == SERVICE_START_PRE)
2340 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2341 else if (s->state == SERVICE_STOP)
2342 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2343 else if (s->state == SERVICE_STOP_POST)
2344 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2345 else if (s->state == SERVICE_RELOAD) {
2346 s->reload_result = SERVICE_FAILURE_RESOURCES;
2347 service_enter_running(s, SERVICE_SUCCESS);
2348 } else
2349 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2350 }
2351
2352 static void service_run_next_main(Service *s) {
2353 pid_t pid;
2354 int r;
2355
2356 assert(s);
2357 assert(s->main_command);
2358 assert(s->main_command->command_next);
2359 assert(s->type == SERVICE_ONESHOT);
2360
2361 s->main_command = s->main_command->command_next;
2362 service_unwatch_main_pid(s);
2363
2364 r = service_spawn(s,
2365 s->main_command,
2366 true,
2367 true,
2368 true,
2369 true,
2370 true,
2371 s->notify_access != NOTIFY_NONE,
2372 false,
2373 &pid);
2374 if (r < 0)
2375 goto fail;
2376
2377 service_set_main_pid(s, pid);
2378
2379 return;
2380
2381 fail:
2382 log_warning_unit(UNIT(s)->id,
2383 "%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2384 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2385 }
2386
2387 static int service_execute_action(Service *s, FailureAction action, const char *reason, bool log_action_none) {
2388 assert(s);
2389
2390 if (action == SERVICE_FAILURE_ACTION_REBOOT ||
2391 action == SERVICE_FAILURE_ACTION_REBOOT_FORCE)
2392 update_reboot_param_file(s->reboot_arg);
2393
2394 switch (action) {
2395
2396 case SERVICE_FAILURE_ACTION_NONE:
2397 if (log_action_none)
2398 log_warning_unit(UNIT(s)->id,
2399 "%s %s, refusing to start.", UNIT(s)->id, reason);
2400 break;
2401
2402 case SERVICE_FAILURE_ACTION_REBOOT: {
2403 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
2404 int r;
2405
2406 log_warning_unit(UNIT(s)->id,
2407 "%s %s, rebooting.", UNIT(s)->id, reason);
2408
2409 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START,
2410 SPECIAL_REBOOT_TARGET, JOB_REPLACE,
2411 true, &error, NULL);
2412 if (r < 0)
2413 log_error_unit(UNIT(s)->id,
2414 "Failed to reboot: %s.", bus_error_message(&error, r));
2415
2416 break;
2417 }
2418
2419 case SERVICE_FAILURE_ACTION_REBOOT_FORCE:
2420 log_warning_unit(UNIT(s)->id,
2421 "%s %s, forcibly rebooting.", UNIT(s)->id, reason);
2422 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2423 break;
2424
2425 case SERVICE_FAILURE_ACTION_REBOOT_IMMEDIATE:
2426 log_warning_unit(UNIT(s)->id,
2427 "%s %s, rebooting immediately.", UNIT(s)->id, reason);
2428 sync();
2429 if (s->reboot_arg) {
2430 log_info("Rebooting with argument '%s'.", s->reboot_arg);
2431 syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
2432 LINUX_REBOOT_CMD_RESTART2, s->reboot_arg);
2433 }
2434
2435 log_info("Rebooting.");
2436 reboot(RB_AUTOBOOT);
2437 break;
2438
2439 default:
2440 log_error_unit(UNIT(s)->id,
2441 "failure action=%i", action);
2442 assert_not_reached("Unknown FailureAction.");
2443 }
2444
2445 return -ECANCELED;
2446 }
2447
2448 static int service_start_limit_test(Service *s) {
2449 assert(s);
2450
2451 if (ratelimit_test(&s->start_limit))
2452 return 0;
2453
2454 return service_execute_action(s, s->start_limit_action, "start request repeated too quickly", true);
2455 }
2456
2457 static int service_start(Unit *u) {
2458 Service *s = SERVICE(u);
2459 int r;
2460
2461 assert(s);
2462
2463 /* We cannot fulfill this request right now, try again later
2464 * please! */
2465 if (s->state == SERVICE_STOP ||
2466 s->state == SERVICE_STOP_SIGTERM ||
2467 s->state == SERVICE_STOP_SIGKILL ||
2468 s->state == SERVICE_STOP_POST ||
2469 s->state == SERVICE_FINAL_SIGTERM ||
2470 s->state == SERVICE_FINAL_SIGKILL)
2471 return -EAGAIN;
2472
2473 /* Already on it! */
2474 if (s->state == SERVICE_START_PRE ||
2475 s->state == SERVICE_START ||
2476 s->state == SERVICE_START_POST)
2477 return 0;
2478
2479 /* A service that will be restarted must be stopped first to
2480 * trigger BindsTo and/or OnFailure dependencies. If a user
2481 * does not want to wait for the holdoff time to elapse, the
2482 * service should be manually restarted, not started. We
2483 * simply return EAGAIN here, so that any start jobs stay
2484 * queued, and assume that the auto restart timer will
2485 * eventually trigger the restart. */
2486 if (s->state == SERVICE_AUTO_RESTART)
2487 return -EAGAIN;
2488
2489 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
2490
2491 /* Make sure we don't enter a busy loop of some kind. */
2492 r = service_start_limit_test(s);
2493 if (r < 0) {
2494 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
2495 return r;
2496 }
2497
2498 s->result = SERVICE_SUCCESS;
2499 s->reload_result = SERVICE_SUCCESS;
2500 s->main_pid_known = false;
2501 s->main_pid_alien = false;
2502 s->forbid_restart = false;
2503
2504 service_enter_start_pre(s);
2505 return 0;
2506 }
2507
2508 static int service_stop(Unit *u) {
2509 Service *s = SERVICE(u);
2510
2511 assert(s);
2512
2513 /* Don't create restart jobs from here. */
2514 s->forbid_restart = true;
2515
2516 /* Already on it */
2517 if (s->state == SERVICE_STOP ||
2518 s->state == SERVICE_STOP_SIGTERM ||
2519 s->state == SERVICE_STOP_SIGKILL ||
2520 s->state == SERVICE_STOP_POST ||
2521 s->state == SERVICE_FINAL_SIGTERM ||
2522 s->state == SERVICE_FINAL_SIGKILL)
2523 return 0;
2524
2525 /* A restart will be scheduled or is in progress. */
2526 if (s->state == SERVICE_AUTO_RESTART) {
2527 service_set_state(s, SERVICE_DEAD);
2528 return 0;
2529 }
2530
2531 /* If there's already something running we go directly into
2532 * kill mode. */
2533 if (s->state == SERVICE_START_PRE ||
2534 s->state == SERVICE_START ||
2535 s->state == SERVICE_START_POST ||
2536 s->state == SERVICE_RELOAD) {
2537 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2538 return 0;
2539 }
2540
2541 assert(s->state == SERVICE_RUNNING ||
2542 s->state == SERVICE_EXITED);
2543
2544 service_enter_stop(s, SERVICE_SUCCESS);
2545 return 0;
2546 }
2547
2548 static int service_reload(Unit *u) {
2549 Service *s = SERVICE(u);
2550
2551 assert(s);
2552
2553 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2554
2555 service_enter_reload(s);
2556 return 0;
2557 }
2558
2559 _pure_ static bool service_can_reload(Unit *u) {
2560 Service *s = SERVICE(u);
2561
2562 assert(s);
2563
2564 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2565 }
2566
2567 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2568 Service *s = SERVICE(u);
2569
2570 assert(u);
2571 assert(f);
2572 assert(fds);
2573
2574 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2575 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2576 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2577
2578 if (s->control_pid > 0)
2579 unit_serialize_item_format(u, f, "control-pid", PID_FMT,
2580 s->control_pid);
2581
2582 if (s->main_pid_known && s->main_pid > 0)
2583 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2584
2585 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2586
2587 if (s->status_text)
2588 unit_serialize_item(u, f, "status-text", s->status_text);
2589
2590 /* FIXME: There's a minor uncleanliness here: if there are
2591 * multiple commands attached here, we will start from the
2592 * first one again */
2593 if (s->control_command_id >= 0)
2594 unit_serialize_item(u, f, "control-command",
2595 service_exec_command_to_string(s->control_command_id));
2596
2597 if (s->socket_fd >= 0) {
2598 int copy;
2599
2600 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2601 return copy;
2602
2603 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2604 }
2605
2606 if (s->main_exec_status.pid > 0) {
2607 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT,
2608 s->main_exec_status.pid);
2609 dual_timestamp_serialize(f, "main-exec-status-start",
2610 &s->main_exec_status.start_timestamp);
2611 dual_timestamp_serialize(f, "main-exec-status-exit",
2612 &s->main_exec_status.exit_timestamp);
2613
2614 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2615 unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
2616 s->main_exec_status.code);
2617 unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
2618 s->main_exec_status.status);
2619 }
2620 }
2621 if (dual_timestamp_is_set(&s->watchdog_timestamp))
2622 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2623
2624 if (s->forbid_restart)
2625 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2626
2627 return 0;
2628 }
2629
2630 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2631 Service *s = SERVICE(u);
2632
2633 assert(u);
2634 assert(key);
2635 assert(value);
2636 assert(fds);
2637
2638 if (streq(key, "state")) {
2639 ServiceState state;
2640
2641 state = service_state_from_string(value);
2642 if (state < 0)
2643 log_debug_unit(u->id, "Failed to parse state value %s", value);
2644 else
2645 s->deserialized_state = state;
2646 } else if (streq(key, "result")) {
2647 ServiceResult f;
2648
2649 f = service_result_from_string(value);
2650 if (f < 0)
2651 log_debug_unit(u->id, "Failed to parse result value %s", value);
2652 else if (f != SERVICE_SUCCESS)
2653 s->result = f;
2654
2655 } else if (streq(key, "reload-result")) {
2656 ServiceResult f;
2657
2658 f = service_result_from_string(value);
2659 if (f < 0)
2660 log_debug_unit(u->id, "Failed to parse reload result value %s", value);
2661 else if (f != SERVICE_SUCCESS)
2662 s->reload_result = f;
2663
2664 } else if (streq(key, "control-pid")) {
2665 pid_t pid;
2666
2667 if (parse_pid(value, &pid) < 0)
2668 log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
2669 else
2670 s->control_pid = pid;
2671 } else if (streq(key, "main-pid")) {
2672 pid_t pid;
2673
2674 if (parse_pid(value, &pid) < 0)
2675 log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
2676 else {
2677 service_set_main_pid(s, pid);
2678 unit_watch_pid(UNIT(s), pid);
2679 }
2680 } else if (streq(key, "main-pid-known")) {
2681 int b;
2682
2683 b = parse_boolean(value);
2684 if (b < 0)
2685 log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
2686 else
2687 s->main_pid_known = b;
2688 } else if (streq(key, "status-text")) {
2689 char *t;
2690
2691 t = strdup(value);
2692 if (!t)
2693 log_oom();
2694 else {
2695 free(s->status_text);
2696 s->status_text = t;
2697 }
2698
2699 } else if (streq(key, "control-command")) {
2700 ServiceExecCommand id;
2701
2702 id = service_exec_command_from_string(value);
2703 if (id < 0)
2704 log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
2705 else {
2706 s->control_command_id = id;
2707 s->control_command = s->exec_command[id];
2708 }
2709 } else if (streq(key, "socket-fd")) {
2710 int fd;
2711
2712 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2713 log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
2714 else {
2715
2716 asynchronous_close(s->socket_fd);
2717 s->socket_fd = fdset_remove(fds, fd);
2718 }
2719 } else if (streq(key, "main-exec-status-pid")) {
2720 pid_t pid;
2721
2722 if (parse_pid(value, &pid) < 0)
2723 log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
2724 else
2725 s->main_exec_status.pid = pid;
2726 } else if (streq(key, "main-exec-status-code")) {
2727 int i;
2728
2729 if (safe_atoi(value, &i) < 0)
2730 log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
2731 else
2732 s->main_exec_status.code = i;
2733 } else if (streq(key, "main-exec-status-status")) {
2734 int i;
2735
2736 if (safe_atoi(value, &i) < 0)
2737 log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
2738 else
2739 s->main_exec_status.status = i;
2740 } else if (streq(key, "main-exec-status-start"))
2741 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2742 else if (streq(key, "main-exec-status-exit"))
2743 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2744 else if (streq(key, "watchdog-timestamp"))
2745 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2746 else if (streq(key, "forbid-restart")) {
2747 int b;
2748
2749 b = parse_boolean(value);
2750 if (b < 0)
2751 log_debug_unit(u->id, "Failed to parse forbid-restart value %s", value);
2752 else
2753 s->forbid_restart = b;
2754 } else
2755 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
2756
2757 return 0;
2758 }
2759
2760 _pure_ static UnitActiveState service_active_state(Unit *u) {
2761 const UnitActiveState *table;
2762
2763 assert(u);
2764
2765 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2766
2767 return table[SERVICE(u)->state];
2768 }
2769
2770 static const char *service_sub_state_to_string(Unit *u) {
2771 assert(u);
2772
2773 return service_state_to_string(SERVICE(u)->state);
2774 }
2775
2776 static bool service_check_gc(Unit *u) {
2777 Service *s = SERVICE(u);
2778
2779 assert(s);
2780
2781 /* Never clean up services that still have a process around,
2782 * even if the service is formally dead. */
2783 if (cgroup_good(s) > 0 ||
2784 main_pid_good(s) > 0 ||
2785 control_pid_good(s) > 0)
2786 return true;
2787
2788 #ifdef HAVE_SYSV_COMPAT
2789 if (s->is_sysv)
2790 return true;
2791 #endif
2792
2793 return false;
2794 }
2795
2796 _pure_ static bool service_check_snapshot(Unit *u) {
2797 Service *s = SERVICE(u);
2798
2799 assert(s);
2800
2801 return (s->socket_fd < 0);
2802 }
2803
2804 static int service_retry_pid_file(Service *s) {
2805 int r;
2806
2807 assert(s->pid_file);
2808 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2809
2810 r = service_load_pid_file(s, false);
2811 if (r < 0)
2812 return r;
2813
2814 service_unwatch_pid_file(s);
2815
2816 service_enter_running(s, SERVICE_SUCCESS);
2817 return 0;
2818 }
2819
2820 static int service_watch_pid_file(Service *s) {
2821 int r;
2822
2823 log_debug_unit(UNIT(s)->id,
2824 "Setting watch for %s's PID file %s",
2825 UNIT(s)->id, s->pid_file_pathspec->path);
2826 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2827 if (r < 0)
2828 goto fail;
2829
2830 /* the pidfile might have appeared just before we set the watch */
2831 log_debug_unit(UNIT(s)->id,
2832 "Trying to read %s's PID file %s in case it changed",
2833 UNIT(s)->id, s->pid_file_pathspec->path);
2834 service_retry_pid_file(s);
2835
2836 return 0;
2837 fail:
2838 log_error_unit(UNIT(s)->id,
2839 "Failed to set a watch for %s's PID file %s: %s",
2840 UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2841 service_unwatch_pid_file(s);
2842 return r;
2843 }
2844
2845 static int service_demand_pid_file(Service *s) {
2846 PathSpec *ps;
2847
2848 assert(s->pid_file);
2849 assert(!s->pid_file_pathspec);
2850
2851 ps = new0(PathSpec, 1);
2852 if (!ps)
2853 return -ENOMEM;
2854
2855 ps->unit = UNIT(s);
2856 ps->path = strdup(s->pid_file);
2857 if (!ps->path) {
2858 free(ps);
2859 return -ENOMEM;
2860 }
2861
2862 path_kill_slashes(ps->path);
2863
2864 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2865 * keep their PID file open all the time. */
2866 ps->type = PATH_MODIFIED;
2867 ps->inotify_fd = -1;
2868
2869 s->pid_file_pathspec = ps;
2870
2871 return service_watch_pid_file(s);
2872 }
2873
2874 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2875 PathSpec *p = userdata;
2876 Service *s;
2877
2878 assert(p);
2879
2880 s = SERVICE(p->unit);
2881
2882 assert(s);
2883 assert(fd >= 0);
2884 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2885 assert(s->pid_file_pathspec);
2886 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2887
2888 log_debug_unit(UNIT(s)->id, "inotify event for %s", UNIT(s)->id);
2889
2890 if (path_spec_fd_event(p, events) < 0)
2891 goto fail;
2892
2893 if (service_retry_pid_file(s) == 0)
2894 return 0;
2895
2896 if (service_watch_pid_file(s) < 0)
2897 goto fail;
2898
2899 return 0;
2900
2901 fail:
2902 service_unwatch_pid_file(s);
2903 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2904 return 0;
2905 }
2906
2907 static void service_notify_cgroup_empty_event(Unit *u) {
2908 Service *s = SERVICE(u);
2909
2910 assert(u);
2911
2912 log_debug_unit(u->id, "%s: cgroup is empty", u->id);
2913
2914 switch (s->state) {
2915
2916 /* Waiting for SIGCHLD is usually more interesting,
2917 * because it includes return codes/signals. Which is
2918 * why we ignore the cgroup events for most cases,
2919 * except when we don't know pid which to expect the
2920 * SIGCHLD for. */
2921
2922 case SERVICE_START:
2923 case SERVICE_START_POST:
2924 /* If we were hoping for the daemon to write its PID file,
2925 * we can give up now. */
2926 if (s->pid_file_pathspec) {
2927 log_warning_unit(u->id,
2928 "%s never wrote its PID file. Failing.", UNIT(s)->id);
2929 service_unwatch_pid_file(s);
2930 if (s->state == SERVICE_START)
2931 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2932 else
2933 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2934 }
2935 break;
2936
2937 case SERVICE_RUNNING:
2938 /* service_enter_running() will figure out what to do */
2939 service_enter_running(s, SERVICE_SUCCESS);
2940 break;
2941
2942 case SERVICE_STOP_SIGTERM:
2943 case SERVICE_STOP_SIGKILL:
2944
2945 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2946 service_enter_stop_post(s, SERVICE_SUCCESS);
2947
2948 break;
2949
2950 case SERVICE_STOP_POST:
2951 case SERVICE_FINAL_SIGTERM:
2952 case SERVICE_FINAL_SIGKILL:
2953 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2954 service_enter_dead(s, SERVICE_SUCCESS, true);
2955
2956 break;
2957
2958 default:
2959 ;
2960 }
2961 }
2962
2963 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2964 Service *s = SERVICE(u);
2965 ServiceResult f;
2966
2967 assert(s);
2968 assert(pid >= 0);
2969
2970 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2971 is_clean_exit_lsb(code, status, &s->success_status))
2972 f = SERVICE_SUCCESS;
2973 else if (code == CLD_EXITED)
2974 f = SERVICE_FAILURE_EXIT_CODE;
2975 else if (code == CLD_KILLED)
2976 f = SERVICE_FAILURE_SIGNAL;
2977 else if (code == CLD_DUMPED)
2978 f = SERVICE_FAILURE_CORE_DUMP;
2979 else
2980 assert_not_reached("Unknown code");
2981
2982 if (s->main_pid == pid) {
2983 /* Forking services may occasionally move to a new PID.
2984 * As long as they update the PID file before exiting the old
2985 * PID, they're fine. */
2986 if (service_load_pid_file(s, false) == 0)
2987 return;
2988
2989 s->main_pid = 0;
2990 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2991
2992 if (s->main_command) {
2993 /* If this is not a forking service than the
2994 * main process got started and hence we copy
2995 * the exit status so that it is recorded both
2996 * as main and as control process exit
2997 * status */
2998
2999 s->main_command->exec_status = s->main_exec_status;
3000
3001 if (s->main_command->ignore)
3002 f = SERVICE_SUCCESS;
3003 } else if (s->exec_command[SERVICE_EXEC_START]) {
3004
3005 /* If this is a forked process, then we should
3006 * ignore the return value if this was
3007 * configured for the starter process */
3008
3009 if (s->exec_command[SERVICE_EXEC_START]->ignore)
3010 f = SERVICE_SUCCESS;
3011 }
3012
3013 log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
3014 u->id,
3015 "MESSAGE=%s: main process exited, code=%s, status=%i/%s",
3016 u->id, sigchld_code_to_string(code), status,
3017 strna(code == CLD_EXITED
3018 ? exit_status_to_string(status, EXIT_STATUS_FULL)
3019 : signal_to_string(status)),
3020 "EXIT_CODE=%s", sigchld_code_to_string(code),
3021 "EXIT_STATUS=%i", status,
3022 NULL);
3023
3024 if (f != SERVICE_SUCCESS)
3025 s->result = f;
3026
3027 if (s->main_command &&
3028 s->main_command->command_next &&
3029 f == SERVICE_SUCCESS) {
3030
3031 /* There is another command to *
3032 * execute, so let's do that. */
3033
3034 log_debug_unit(u->id,
3035 "%s running next main command for state %s",
3036 u->id, service_state_to_string(s->state));
3037 service_run_next_main(s);
3038
3039 } else {
3040
3041 /* The service exited, so the service is officially
3042 * gone. */
3043 s->main_command = NULL;
3044
3045 switch (s->state) {
3046
3047 case SERVICE_START_POST:
3048 case SERVICE_RELOAD:
3049 case SERVICE_STOP:
3050 /* Need to wait until the operation is
3051 * done */
3052 break;
3053
3054 case SERVICE_START:
3055 if (s->type == SERVICE_ONESHOT) {
3056 /* This was our main goal, so let's go on */
3057 if (f == SERVICE_SUCCESS)
3058 service_enter_start_post(s);
3059 else
3060 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3061 break;
3062 }
3063
3064 /* Fall through */
3065
3066 case SERVICE_RUNNING:
3067 service_enter_running(s, f);
3068 break;
3069
3070 case SERVICE_STOP_SIGTERM:
3071 case SERVICE_STOP_SIGKILL:
3072
3073 if (!control_pid_good(s))
3074 service_enter_stop_post(s, f);
3075
3076 /* If there is still a control process, wait for that first */
3077 break;
3078
3079 case SERVICE_STOP_POST:
3080 case SERVICE_FINAL_SIGTERM:
3081 case SERVICE_FINAL_SIGKILL:
3082
3083 if (!control_pid_good(s))
3084 service_enter_dead(s, f, true);
3085 break;
3086
3087 default:
3088 assert_not_reached("Uh, main process died at wrong time.");
3089 }
3090 }
3091
3092 } else if (s->control_pid == pid) {
3093 s->control_pid = 0;
3094
3095 if (s->control_command) {
3096 exec_status_exit(&s->control_command->exec_status,
3097 &s->exec_context, pid, code, status);
3098
3099 if (s->control_command->ignore)
3100 f = SERVICE_SUCCESS;
3101 }
3102
3103 log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
3104 "%s: control process exited, code=%s status=%i",
3105 u->id, sigchld_code_to_string(code), status);
3106
3107 if (f != SERVICE_SUCCESS)
3108 s->result = f;
3109
3110 /* Immediately get rid of the cgroup, so that the
3111 * kernel doesn't delay the cgroup empty messages for
3112 * the service cgroup any longer than necessary */
3113 service_kill_control_processes(s);
3114
3115 if (s->control_command &&
3116 s->control_command->command_next &&
3117 f == SERVICE_SUCCESS) {
3118
3119 /* There is another command to *
3120 * execute, so let's do that. */
3121
3122 log_debug_unit(u->id,
3123 "%s running next control command for state %s",
3124 u->id, service_state_to_string(s->state));
3125 service_run_next_control(s);
3126
3127 } else {
3128 /* No further commands for this step, so let's
3129 * figure out what to do next */
3130
3131 s->control_command = NULL;
3132 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3133
3134 log_debug_unit(u->id,
3135 "%s got final SIGCHLD for state %s",
3136 u->id, service_state_to_string(s->state));
3137
3138 switch (s->state) {
3139
3140 case SERVICE_START_PRE:
3141 if (f == SERVICE_SUCCESS)
3142 service_enter_start(s);
3143 else
3144 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3145 break;
3146
3147 case SERVICE_START:
3148 if (s->type != SERVICE_FORKING)
3149 /* Maybe spurious event due to a reload that changed the type? */
3150 break;
3151
3152 if (f != SERVICE_SUCCESS) {
3153 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3154 break;
3155 }
3156
3157 if (s->pid_file) {
3158 bool has_start_post;
3159 int r;
3160
3161 /* Let's try to load the pid file here if we can.
3162 * The PID file might actually be created by a START_POST
3163 * script. In that case don't worry if the loading fails. */
3164
3165 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3166 r = service_load_pid_file(s, !has_start_post);
3167 if (!has_start_post && r < 0) {
3168 r = service_demand_pid_file(s);
3169 if (r < 0 || !cgroup_good(s))
3170 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3171 break;
3172 }
3173 } else
3174 service_search_main_pid(s);
3175
3176 service_enter_start_post(s);
3177 break;
3178
3179 case SERVICE_START_POST:
3180 if (f != SERVICE_SUCCESS) {
3181 service_enter_stop(s, f);
3182 break;
3183 }
3184
3185 if (s->pid_file) {
3186 int r;
3187
3188 r = service_load_pid_file(s, true);
3189 if (r < 0) {
3190 r = service_demand_pid_file(s);
3191 if (r < 0 || !cgroup_good(s))
3192 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3193 break;
3194 }
3195 } else
3196 service_search_main_pid(s);
3197
3198 service_enter_running(s, SERVICE_SUCCESS);
3199 break;
3200
3201 case SERVICE_RELOAD:
3202 if (f == SERVICE_SUCCESS) {
3203 service_load_pid_file(s, true);
3204 service_search_main_pid(s);
3205 }
3206
3207 s->reload_result = f;
3208 service_enter_running(s, SERVICE_SUCCESS);
3209 break;
3210
3211 case SERVICE_STOP:
3212 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3213 break;
3214
3215 case SERVICE_STOP_SIGTERM:
3216 case SERVICE_STOP_SIGKILL:
3217 if (main_pid_good(s) <= 0)
3218 service_enter_stop_post(s, f);
3219
3220 /* If there is still a service
3221 * process around, wait until
3222 * that one quit, too */
3223 break;
3224
3225 case SERVICE_STOP_POST:
3226 case SERVICE_FINAL_SIGTERM:
3227 case SERVICE_FINAL_SIGKILL:
3228 if (main_pid_good(s) <= 0)
3229 service_enter_dead(s, f, true);
3230 break;
3231
3232 default:
3233 assert_not_reached("Uh, control process died at wrong time.");
3234 }
3235 }
3236 }
3237
3238 /* Notify clients about changed exit status */
3239 unit_add_to_dbus_queue(u);
3240
3241 /* We got one SIGCHLD for the service, let's watch all
3242 * processes that are now running of the service, and watch
3243 * that. Among the PIDs we then watch will be children
3244 * reassigned to us, which hopefully allows us to identify
3245 * when all children are gone */
3246 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
3247 unit_watch_all_pids(u);
3248
3249 /* If the PID set is empty now, then let's finish this off */
3250 if (set_isempty(u->pids))
3251 service_notify_cgroup_empty_event(u);
3252 }
3253
3254 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3255 Service *s = SERVICE(userdata);
3256
3257 assert(s);
3258 assert(source == s->timer_event_source);
3259
3260 switch (s->state) {
3261
3262 case SERVICE_START_PRE:
3263 case SERVICE_START:
3264 log_warning_unit(UNIT(s)->id,
3265 "%s %s operation timed out. Terminating.",
3266 UNIT(s)->id,
3267 s->state == SERVICE_START ? "start" : "start-pre");
3268 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3269 break;
3270
3271 case SERVICE_START_POST:
3272 log_warning_unit(UNIT(s)->id,
3273 "%s start-post operation timed out. Stopping.", UNIT(s)->id);
3274 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3275 break;
3276
3277 case SERVICE_RELOAD:
3278 log_warning_unit(UNIT(s)->id,
3279 "%s reload operation timed out. Stopping.", UNIT(s)->id);
3280 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3281 service_enter_running(s, SERVICE_SUCCESS);
3282 break;
3283
3284 case SERVICE_STOP:
3285 log_warning_unit(UNIT(s)->id,
3286 "%s stopping timed out. Terminating.", UNIT(s)->id);
3287 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3288 break;
3289
3290 case SERVICE_STOP_SIGTERM:
3291 if (s->kill_context.send_sigkill) {
3292 log_warning_unit(UNIT(s)->id,
3293 "%s stop-sigterm timed out. Killing.", UNIT(s)->id);
3294 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3295 } else {
3296 log_warning_unit(UNIT(s)->id,
3297 "%s stop-sigterm timed out. Skipping SIGKILL.", UNIT(s)->id);
3298 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3299 }
3300
3301 break;
3302
3303 case SERVICE_STOP_SIGKILL:
3304 /* Uh, we sent a SIGKILL and it is still not gone?
3305 * Must be something we cannot kill, so let's just be
3306 * weirded out and continue */
3307
3308 log_warning_unit(UNIT(s)->id,
3309 "%s still around after SIGKILL. Ignoring.", UNIT(s)->id);
3310 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3311 break;
3312
3313 case SERVICE_STOP_POST:
3314 log_warning_unit(UNIT(s)->id,
3315 "%s stop-post timed out. Terminating.", UNIT(s)->id);
3316 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3317 break;
3318
3319 case SERVICE_FINAL_SIGTERM:
3320 if (s->kill_context.send_sigkill) {
3321 log_warning_unit(UNIT(s)->id,
3322 "%s stop-final-sigterm timed out. Killing.", UNIT(s)->id);
3323 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3324 } else {
3325 log_warning_unit(UNIT(s)->id,
3326 "%s stop-final-sigterm timed out. Skipping SIGKILL. Entering failed mode.",
3327 UNIT(s)->id);
3328 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3329 }
3330
3331 break;
3332
3333 case SERVICE_FINAL_SIGKILL:
3334 log_warning_unit(UNIT(s)->id,
3335 "%s still around after final SIGKILL. Entering failed mode.", UNIT(s)->id);
3336 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3337 break;
3338
3339 case SERVICE_AUTO_RESTART:
3340 log_info_unit(UNIT(s)->id,
3341 s->restart_usec > 0 ?
3342 "%s holdoff time over, scheduling restart." :
3343 "%s has no holdoff time, scheduling restart.",
3344 UNIT(s)->id);
3345 service_enter_restart(s);
3346 break;
3347
3348 default:
3349 assert_not_reached("Timeout at wrong time.");
3350 }
3351
3352 return 0;
3353 }
3354
3355 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3356 Service *s = SERVICE(userdata);
3357
3358 assert(s);
3359 assert(source == s->watchdog_event_source);
3360
3361 log_error_unit(UNIT(s)->id, "%s watchdog timeout!", UNIT(s)->id);
3362 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_WATCHDOG);
3363
3364 return 0;
3365 }
3366
3367 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3368 Service *s = SERVICE(u);
3369 const char *e;
3370 bool notify_dbus = false;
3371
3372 assert(u);
3373
3374 log_debug_unit(u->id, "%s: Got notification message from PID "PID_FMT" (%s...)",
3375 u->id, pid, tags && *tags ? tags[0] : "(empty)");
3376
3377 if (s->notify_access == NOTIFY_NONE) {
3378 log_warning_unit(u->id,
3379 "%s: Got notification message from PID "PID_FMT", but reception is disabled.",
3380 u->id, pid);
3381 return;
3382 }
3383
3384 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3385
3386 if (s->main_pid != 0)
3387 log_warning_unit(u->id, "%s: Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, u->id, pid, s->main_pid);
3388 else
3389 log_debug_unit(u->id, "%s: Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", u->id, pid);
3390 return;
3391 }
3392
3393 /* Interpret MAINPID= */
3394 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3395 (s->state == SERVICE_START ||
3396 s->state == SERVICE_START_POST ||
3397 s->state == SERVICE_RUNNING ||
3398 s->state == SERVICE_RELOAD)) {
3399
3400 if (parse_pid(e + 8, &pid) < 0)
3401 log_warning_unit(u->id, "Failed to parse notification message %s", e);
3402 else {
3403 log_debug_unit(u->id, "%s: got %s", u->id, e);
3404 service_set_main_pid(s, pid);
3405 unit_watch_pid(UNIT(s), pid);
3406 notify_dbus = true;
3407 }
3408 }
3409
3410 /* Interpret READY= */
3411 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START && strv_find(tags, "READY=1")) {
3412 log_debug_unit(u->id, "%s: got READY=1", u->id);
3413 service_enter_start_post(s);
3414 notify_dbus = true;
3415 }
3416
3417 /* Interpret STATUS= */
3418 e = strv_find_prefix(tags, "STATUS=");
3419 if (e) {
3420 char *t;
3421
3422 if (e[7]) {
3423 if (!utf8_is_valid(e+7)) {
3424 log_warning_unit(u->id, "Status message in notification is not UTF-8 clean.");
3425 return;
3426 }
3427
3428 log_debug_unit(u->id, "%s: got %s", u->id, e);
3429
3430 t = strdup(e+7);
3431 if (!t) {
3432 log_oom();
3433 return;
3434 }
3435
3436 } else
3437 t = NULL;
3438
3439 if (!streq_ptr(s->status_text, t)) {
3440 free(s->status_text);
3441 s->status_text = t;
3442 notify_dbus = true;
3443 } else
3444 free(t);
3445 }
3446
3447 /* Interpret WATCHDOG= */
3448 if (strv_find(tags, "WATCHDOG=1")) {
3449 log_debug_unit(u->id, "%s: got WATCHDOG=1", u->id);
3450 service_reset_watchdog(s);
3451 }
3452
3453 /* Notify clients about changed status or main pid */
3454 if (notify_dbus)
3455 unit_add_to_dbus_queue(u);
3456 }
3457
3458 static int service_get_timeout(Unit *u, uint64_t *timeout) {
3459 Service *s = SERVICE(u);
3460 int r;
3461
3462 if (!s->timer_event_source)
3463 return 0;
3464
3465 r = sd_event_source_get_time(s->timer_event_source, timeout);
3466 if (r < 0)
3467 return r;
3468
3469 return 1;
3470 }
3471
3472 #ifdef HAVE_SYSV_COMPAT
3473
3474 static int service_enumerate(Manager *m) {
3475 char **p;
3476 unsigned i;
3477 _cleanup_closedir_ DIR *d = NULL;
3478 _cleanup_free_ char *path = NULL, *fpath = NULL, *name = NULL;
3479 Set *runlevel_services[ELEMENTSOF(rcnd_table)] = {};
3480 _cleanup_set_free_ Set *shutdown_services = NULL;
3481 Unit *service;
3482 Iterator j;
3483 int r;
3484
3485 assert(m);
3486
3487 if (m->running_as != SYSTEMD_SYSTEM)
3488 return 0;
3489
3490 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3491 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3492 struct dirent *de;
3493
3494 free(path);
3495 path = strjoin(*p, "/", rcnd_table[i].path, NULL);
3496 if (!path) {
3497 r = -ENOMEM;
3498 goto finish;
3499 }
3500
3501 if (d)
3502 closedir(d);
3503
3504 d = opendir(path);
3505 if (!d) {
3506 if (errno != ENOENT)
3507 log_warning("opendir(%s) failed: %m", path);
3508
3509 continue;
3510 }
3511
3512 while ((de = readdir(d))) {
3513 int a, b;
3514
3515 if (ignore_file(de->d_name))
3516 continue;
3517
3518 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3519 continue;
3520
3521 if (strlen(de->d_name) < 4)
3522 continue;
3523
3524 a = undecchar(de->d_name[1]);
3525 b = undecchar(de->d_name[2]);
3526
3527 if (a < 0 || b < 0)
3528 continue;
3529
3530 free(fpath);
3531 fpath = strjoin(path, "/", de->d_name, NULL);
3532 if (!fpath) {
3533 r = -ENOMEM;
3534 goto finish;
3535 }
3536
3537 if (access(fpath, X_OK) < 0) {
3538
3539 if (errno != ENOENT)
3540 log_warning("access() failed on %s: %m", fpath);
3541
3542 continue;
3543 }
3544
3545 free(name);
3546 name = sysv_translate_name(de->d_name + 3);
3547 if (!name) {
3548 r = log_oom();
3549 goto finish;
3550 }
3551
3552 r = manager_load_unit_prepare(m, name, NULL, NULL, &service);
3553 if (r < 0) {
3554 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3555 continue;
3556 }
3557
3558 if (de->d_name[0] == 'S') {
3559
3560 if (rcnd_table[i].type == RUNLEVEL_UP) {
3561 SERVICE(service)->sysv_start_priority_from_rcnd =
3562 MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3563
3564 SERVICE(service)->sysv_enabled = true;
3565 }
3566
3567 r = set_ensure_allocated(&runlevel_services[i],
3568 trivial_hash_func, trivial_compare_func);
3569 if (r < 0)
3570 goto finish;
3571
3572 r = set_put(runlevel_services[i], service);
3573 if (r < 0)
3574 goto finish;
3575
3576 } else if (de->d_name[0] == 'K' &&
3577 (rcnd_table[i].type == RUNLEVEL_DOWN)) {
3578
3579 r = set_ensure_allocated(&shutdown_services,
3580 trivial_hash_func, trivial_compare_func);
3581 if (r < 0)
3582 goto finish;
3583
3584 r = set_put(shutdown_services, service);
3585 if (r < 0)
3586 goto finish;
3587 }
3588 }
3589 }
3590
3591 /* Now we loaded all stubs and are aware of the lowest
3592 start-up priority for all services, not let's actually load
3593 the services, this will also tell us which services are
3594 actually native now */
3595 manager_dispatch_load_queue(m);
3596
3597 /* If this is a native service, rely on native ways to pull in
3598 * a service, don't pull it in via sysv rcN.d links. */
3599 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3600 SET_FOREACH(service, runlevel_services[i], j) {
3601 service = unit_follow_merge(service);
3602
3603 if (service->fragment_path)
3604 continue;
3605
3606 r = unit_add_two_dependencies_by_name_inverse(
3607 service, UNIT_AFTER, UNIT_WANTS,
3608 rcnd_table[i].target, NULL, true);
3609 if (r < 0)
3610 goto finish;
3611 }
3612
3613 /* We honour K links only for halt/reboot. For the normal
3614 * runlevels we assume the stop jobs will be implicitly added
3615 * by the core logic. Also, we don't really distinguish here
3616 * between the runlevels 0 and 6 and just add them to the
3617 * special shutdown target. */
3618 SET_FOREACH(service, shutdown_services, j) {
3619 service = unit_follow_merge(service);
3620
3621 if (service->fragment_path)
3622 continue;
3623
3624 r = unit_add_two_dependencies_by_name(
3625 service, UNIT_BEFORE, UNIT_CONFLICTS,
3626 SPECIAL_SHUTDOWN_TARGET, NULL, true);
3627 if (r < 0)
3628 goto finish;
3629 }
3630
3631 r = 0;
3632
3633 finish:
3634
3635 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3636 set_free(runlevel_services[i]);
3637
3638 return r;
3639 }
3640 #endif
3641
3642 static void service_bus_name_owner_change(
3643 Unit *u,
3644 const char *name,
3645 const char *old_owner,
3646 const char *new_owner) {
3647
3648 Service *s = SERVICE(u);
3649 int r;
3650
3651 assert(s);
3652 assert(name);
3653
3654 assert(streq(s->bus_name, name));
3655 assert(old_owner || new_owner);
3656
3657 if (old_owner && new_owner)
3658 log_debug_unit(u->id,
3659 "%s's D-Bus name %s changed owner from %s to %s",
3660 u->id, name, old_owner, new_owner);
3661 else if (old_owner)
3662 log_debug_unit(u->id,
3663 "%s's D-Bus name %s no longer registered by %s",
3664 u->id, name, old_owner);
3665 else
3666 log_debug_unit(u->id,
3667 "%s's D-Bus name %s now registered by %s",
3668 u->id, name, new_owner);
3669
3670 s->bus_name_good = !!new_owner;
3671
3672 if (s->type == SERVICE_DBUS) {
3673
3674 /* service_enter_running() will figure out what to
3675 * do */
3676 if (s->state == SERVICE_RUNNING)
3677 service_enter_running(s, SERVICE_SUCCESS);
3678 else if (s->state == SERVICE_START && new_owner)
3679 service_enter_start_post(s);
3680
3681 } else if (new_owner &&
3682 s->main_pid <= 0 &&
3683 (s->state == SERVICE_START ||
3684 s->state == SERVICE_START_POST ||
3685 s->state == SERVICE_RUNNING ||
3686 s->state == SERVICE_RELOAD)) {
3687
3688 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
3689 pid_t pid;
3690
3691 /* Try to acquire PID from bus service */
3692
3693 r = sd_bus_get_owner(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3694 if (r >= 0)
3695 r = sd_bus_creds_get_pid(creds, &pid);
3696 if (r >= 0) {
3697 log_debug_unit(u->id, "%s's D-Bus name %s is now owned by process %u", u->id, name, (unsigned) pid);
3698
3699 service_set_main_pid(s, pid);
3700 unit_watch_pid(UNIT(s), pid);
3701 }
3702 }
3703 }
3704
3705 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3706 _cleanup_free_ char *peer = NULL;
3707 int r;
3708
3709 assert(s);
3710 assert(fd >= 0);
3711
3712 /* This is called by the socket code when instantiating a new
3713 * service for a stream socket and the socket needs to be
3714 * configured. */
3715
3716 if (UNIT(s)->load_state != UNIT_LOADED)
3717 return -EINVAL;
3718
3719 if (s->socket_fd >= 0)
3720 return -EBUSY;
3721
3722 if (s->state != SERVICE_DEAD)
3723 return -EAGAIN;
3724
3725 if (getpeername_pretty(fd, &peer) >= 0) {
3726
3727 if (UNIT(s)->description) {
3728 _cleanup_free_ char *a;
3729
3730 a = strjoin(UNIT(s)->description, " (", peer, ")", NULL);
3731 if (!a)
3732 return -ENOMEM;
3733
3734 r = unit_set_description(UNIT(s), a);
3735 } else
3736 r = unit_set_description(UNIT(s), peer);
3737
3738 if (r < 0)
3739 return r;
3740 }
3741
3742 s->socket_fd = fd;
3743
3744 unit_ref_set(&s->accept_socket, UNIT(sock));
3745
3746 return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3747 }
3748
3749 static void service_reset_failed(Unit *u) {
3750 Service *s = SERVICE(u);
3751
3752 assert(s);
3753
3754 if (s->state == SERVICE_FAILED)
3755 service_set_state(s, SERVICE_DEAD);
3756
3757 s->result = SERVICE_SUCCESS;
3758 s->reload_result = SERVICE_SUCCESS;
3759
3760 RATELIMIT_RESET(s->start_limit);
3761 }
3762
3763 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3764 Service *s = SERVICE(u);
3765
3766 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3767 }
3768
3769 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3770 [SERVICE_DEAD] = "dead",
3771 [SERVICE_START_PRE] = "start-pre",
3772 [SERVICE_START] = "start",
3773 [SERVICE_START_POST] = "start-post",
3774 [SERVICE_RUNNING] = "running",
3775 [SERVICE_EXITED] = "exited",
3776 [SERVICE_RELOAD] = "reload",
3777 [SERVICE_STOP] = "stop",
3778 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3779 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3780 [SERVICE_STOP_POST] = "stop-post",
3781 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3782 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3783 [SERVICE_FAILED] = "failed",
3784 [SERVICE_AUTO_RESTART] = "auto-restart",
3785 };
3786
3787 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3788
3789 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3790 [SERVICE_RESTART_NO] = "no",
3791 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3792 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3793 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3794 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3795 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3796 [SERVICE_RESTART_ALWAYS] = "always",
3797 };
3798
3799 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3800
3801 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3802 [SERVICE_SIMPLE] = "simple",
3803 [SERVICE_FORKING] = "forking",
3804 [SERVICE_ONESHOT] = "oneshot",
3805 [SERVICE_DBUS] = "dbus",
3806 [SERVICE_NOTIFY] = "notify",
3807 [SERVICE_IDLE] = "idle"
3808 };
3809
3810 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3811
3812 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3813 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3814 [SERVICE_EXEC_START] = "ExecStart",
3815 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3816 [SERVICE_EXEC_RELOAD] = "ExecReload",
3817 [SERVICE_EXEC_STOP] = "ExecStop",
3818 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3819 };
3820
3821 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3822
3823 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3824 [NOTIFY_NONE] = "none",
3825 [NOTIFY_MAIN] = "main",
3826 [NOTIFY_ALL] = "all"
3827 };
3828
3829 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3830
3831 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3832 [SERVICE_SUCCESS] = "success",
3833 [SERVICE_FAILURE_RESOURCES] = "resources",
3834 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3835 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3836 [SERVICE_FAILURE_SIGNAL] = "signal",
3837 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3838 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3839 [SERVICE_FAILURE_START_LIMIT] = "start-limit"
3840 };
3841
3842 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3843
3844 static const char* const failure_action_table[_SERVICE_FAILURE_ACTION_MAX] = {
3845 [SERVICE_FAILURE_ACTION_NONE] = "none",
3846 [SERVICE_FAILURE_ACTION_REBOOT] = "reboot",
3847 [SERVICE_FAILURE_ACTION_REBOOT_FORCE] = "reboot-force",
3848 [SERVICE_FAILURE_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate"
3849 };
3850 DEFINE_STRING_TABLE_LOOKUP(failure_action, FailureAction);
3851
3852 const UnitVTable service_vtable = {
3853 .object_size = sizeof(Service),
3854 .exec_context_offset = offsetof(Service, exec_context),
3855 .cgroup_context_offset = offsetof(Service, cgroup_context),
3856 .kill_context_offset = offsetof(Service, kill_context),
3857 .exec_runtime_offset = offsetof(Service, exec_runtime),
3858
3859 .sections =
3860 "Unit\0"
3861 "Service\0"
3862 "Install\0",
3863 .private_section = "Service",
3864
3865 .init = service_init,
3866 .done = service_done,
3867 .load = service_load,
3868
3869 .coldplug = service_coldplug,
3870
3871 .dump = service_dump,
3872
3873 .start = service_start,
3874 .stop = service_stop,
3875 .reload = service_reload,
3876
3877 .can_reload = service_can_reload,
3878
3879 .kill = service_kill,
3880
3881 .serialize = service_serialize,
3882 .deserialize_item = service_deserialize_item,
3883
3884 .active_state = service_active_state,
3885 .sub_state_to_string = service_sub_state_to_string,
3886
3887 .check_gc = service_check_gc,
3888 .check_snapshot = service_check_snapshot,
3889
3890 .sigchld_event = service_sigchld_event,
3891
3892 .reset_failed = service_reset_failed,
3893
3894 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3895 .notify_message = service_notify_message,
3896
3897 .bus_name_owner_change = service_bus_name_owner_change,
3898
3899 .bus_interface = "org.freedesktop.systemd1.Service",
3900 .bus_vtable = bus_service_vtable,
3901 .bus_set_property = bus_service_set_property,
3902 .bus_commit_properties = bus_service_commit_properties,
3903
3904 .get_timeout = service_get_timeout,
3905
3906 #ifdef HAVE_SYSV_COMPAT
3907 .enumerate = service_enumerate,
3908 #endif
3909
3910 .can_transient = true,
3911
3912 .status_message_formats = {
3913 .starting_stopping = {
3914 [0] = "Starting %s...",
3915 [1] = "Stopping %s...",
3916 },
3917 .finished_start_job = {
3918 [JOB_DONE] = "Started %s.",
3919 [JOB_FAILED] = "Failed to start %s.",
3920 [JOB_DEPENDENCY] = "Dependency failed for %s.",
3921 [JOB_TIMEOUT] = "Timed out starting %s.",
3922 },
3923 .finished_stop_job = {
3924 [JOB_DONE] = "Stopped %s.",
3925 [JOB_FAILED] = "Stopped (with error) %s.",
3926 [JOB_TIMEOUT] = "Timed out stopping %s.",
3927 },
3928 },
3929 };
Unnamed repository; edit this file 'description' to name the repository.