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