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service: rename StartLimitAction enum to FailureAction
[thirdparty/systemd.git] / src / core / service.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include <errno.h>
23 #include <signal.h>
24 #include <dirent.h>
25 #include <unistd.h>
26 #include <sys/reboot.h>
27 #include <linux/reboot.h>
28 #include <sys/syscall.h>
29
30 #include "manager.h"
31 #include "unit.h"
32 #include "service.h"
33 #include "load-fragment.h"
34 #include "load-dropin.h"
35 #include "log.h"
36 #include "strv.h"
37 #include "unit-name.h"
38 #include "unit-printf.h"
39 #include "dbus-service.h"
40 #include "special.h"
41 #include "exit-status.h"
42 #include "def.h"
43 #include "path-util.h"
44 #include "util.h"
45 #include "utf8.h"
46 #include "env-util.h"
47 #include "fileio.h"
48 #include "bus-error.h"
49 #include "bus-util.h"
50
51 #ifdef HAVE_SYSV_COMPAT
52
53 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
54
55 typedef enum RunlevelType {
56 RUNLEVEL_UP,
57 RUNLEVEL_DOWN
58 } RunlevelType;
59
60 static const struct {
61 const char *path;
62 const char *target;
63 const RunlevelType type;
64 } rcnd_table[] = {
65 /* Standard SysV runlevels for start-up */
66 { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP },
67 { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
68 { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
69 { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
70 { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
71
72 /* Standard SysV runlevels for shutdown */
73 { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN },
74 { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }
75
76 /* Note that the order here matters, as we read the
77 directories in this order, and we want to make sure that
78 sysv_start_priority is known when we first load the
79 unit. And that value we only know from S links. Hence
80 UP must be read before DOWN */
81 };
82
83 #define RUNLEVELS_UP "12345"
84 #endif
85
86 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
87 [SERVICE_DEAD] = UNIT_INACTIVE,
88 [SERVICE_START_PRE] = UNIT_ACTIVATING,
89 [SERVICE_START] = UNIT_ACTIVATING,
90 [SERVICE_START_POST] = UNIT_ACTIVATING,
91 [SERVICE_RUNNING] = UNIT_ACTIVE,
92 [SERVICE_EXITED] = UNIT_ACTIVE,
93 [SERVICE_RELOAD] = UNIT_RELOADING,
94 [SERVICE_STOP] = UNIT_DEACTIVATING,
95 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
96 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
97 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
98 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
99 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
100 [SERVICE_FAILED] = UNIT_FAILED,
101 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
102 };
103
104 /* For Type=idle we never want to delay any other jobs, hence we
105 * consider idle jobs active as soon as we start working on them */
106 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
107 [SERVICE_DEAD] = UNIT_INACTIVE,
108 [SERVICE_START_PRE] = UNIT_ACTIVE,
109 [SERVICE_START] = UNIT_ACTIVE,
110 [SERVICE_START_POST] = UNIT_ACTIVE,
111 [SERVICE_RUNNING] = UNIT_ACTIVE,
112 [SERVICE_EXITED] = UNIT_ACTIVE,
113 [SERVICE_RELOAD] = UNIT_RELOADING,
114 [SERVICE_STOP] = UNIT_DEACTIVATING,
115 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
116 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
117 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
118 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
119 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
120 [SERVICE_FAILED] = UNIT_FAILED,
121 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
122 };
123
124 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
125 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
126 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
127
128 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
129
130 static void service_init(Unit *u) {
131 Service *s = SERVICE(u);
132
133 assert(u);
134 assert(u->load_state == UNIT_STUB);
135
136 s->timeout_start_usec = u->manager->default_timeout_start_usec;
137 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
138 s->restart_usec = u->manager->default_restart_usec;
139 s->type = _SERVICE_TYPE_INVALID;
140
141 #ifdef HAVE_SYSV_COMPAT
142 s->sysv_start_priority = -1;
143 s->sysv_start_priority_from_rcnd = -1;
144 #endif
145 s->socket_fd = -1;
146 s->guess_main_pid = true;
147
148 RATELIMIT_INIT(s->start_limit, u->manager->default_start_limit_interval, u->manager->default_start_limit_burst);
149
150 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
151 }
152
153 static void service_unwatch_control_pid(Service *s) {
154 assert(s);
155
156 if (s->control_pid <= 0)
157 return;
158
159 unit_unwatch_pid(UNIT(s), s->control_pid);
160 s->control_pid = 0;
161 }
162
163 static void service_unwatch_main_pid(Service *s) {
164 assert(s);
165
166 if (s->main_pid <= 0)
167 return;
168
169 unit_unwatch_pid(UNIT(s), s->main_pid);
170 s->main_pid = 0;
171 }
172
173 static void service_unwatch_pid_file(Service *s) {
174 if (!s->pid_file_pathspec)
175 return;
176
177 log_debug_unit(UNIT(s)->id, "Stopping watch for %s's PID file %s",
178 UNIT(s)->id, s->pid_file_pathspec->path);
179 path_spec_unwatch(s->pid_file_pathspec);
180 path_spec_done(s->pid_file_pathspec);
181 free(s->pid_file_pathspec);
182 s->pid_file_pathspec = NULL;
183 }
184
185 static int service_set_main_pid(Service *s, pid_t pid) {
186 pid_t ppid;
187
188 assert(s);
189
190 if (pid <= 1)
191 return -EINVAL;
192
193 if (pid == getpid())
194 return -EINVAL;
195
196 if (s->main_pid == pid && s->main_pid_known)
197 return 0;
198
199 if (s->main_pid != pid) {
200 service_unwatch_main_pid(s);
201 exec_status_start(&s->main_exec_status, pid);
202 }
203
204 s->main_pid = pid;
205 s->main_pid_known = true;
206
207 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
208 log_warning_unit(UNIT(s)->id,
209 "%s: Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.",
210 UNIT(s)->id, pid);
211
212 s->main_pid_alien = true;
213 } else
214 s->main_pid_alien = false;
215
216 return 0;
217 }
218
219 static void service_close_socket_fd(Service *s) {
220 assert(s);
221
222 if (s->socket_fd < 0)
223 return;
224
225 s->socket_fd = safe_close(s->socket_fd);
226 }
227
228 static void service_connection_unref(Service *s) {
229 assert(s);
230
231 if (!UNIT_ISSET(s->accept_socket))
232 return;
233
234 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
235 unit_ref_unset(&s->accept_socket);
236 }
237
238 static void service_stop_watchdog(Service *s) {
239 assert(s);
240
241 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
242 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
243 }
244
245 static void service_start_watchdog(Service *s) {
246 int r;
247
248 assert(s);
249
250 if (s->watchdog_usec <= 0)
251 return;
252
253 if (s->watchdog_event_source) {
254 r = sd_event_source_set_time(s->watchdog_event_source, s->watchdog_timestamp.monotonic + s->watchdog_usec);
255 if (r < 0) {
256 log_warning_unit(UNIT(s)->id, "%s failed to reset watchdog timer: %s", UNIT(s)->id, strerror(-r));
257 return;
258 }
259
260 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
261 } else {
262 r = sd_event_add_time(
263 UNIT(s)->manager->event,
264 &s->watchdog_event_source,
265 CLOCK_MONOTONIC,
266 s->watchdog_timestamp.monotonic + s->watchdog_usec, 0,
267 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 free(s->reboot_arg);
306 s->reboot_arg = NULL;
307
308 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
309 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
310 s->control_command = NULL;
311 s->main_command = NULL;
312
313 set_free(s->restart_ignore_status.code);
314 s->restart_ignore_status.code = NULL;
315 set_free(s->restart_ignore_status.signal);
316 s->restart_ignore_status.signal = NULL;
317
318 set_free(s->success_status.code);
319 s->success_status.code = NULL;
320 set_free(s->success_status.signal);
321 s->success_status.signal = NULL;
322
323 /* This will leak a process, but at least no memory or any of
324 * our resources */
325 service_unwatch_main_pid(s);
326 service_unwatch_control_pid(s);
327 service_unwatch_pid_file(s);
328
329 if (s->bus_name) {
330 unit_unwatch_bus_name(u, s->bus_name);
331 free(s->bus_name);
332 s->bus_name = NULL;
333 }
334
335 service_close_socket_fd(s);
336 service_connection_unref(s);
337
338 unit_ref_unset(&s->accept_socket);
339
340 service_stop_watchdog(s);
341
342 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
343 }
344
345 static int service_arm_timer(Service *s, usec_t usec) {
346 int r;
347
348 assert(s);
349
350 if (s->timer_event_source) {
351 r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + usec);
352 if (r < 0)
353 return r;
354
355 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
356 }
357
358 return sd_event_add_time(
359 UNIT(s)->manager->event,
360 &s->timer_event_source,
361 CLOCK_MONOTONIC,
362 now(CLOCK_MONOTONIC) + usec, 0,
363 service_dispatch_timer, s);
364 }
365
366 #ifdef HAVE_SYSV_COMPAT
367 static char *sysv_translate_name(const char *name) {
368 char *r;
369
370 r = new(char, strlen(name) + strlen(".service") + 1);
371 if (!r)
372 return NULL;
373
374 if (endswith(name, ".sh"))
375 /* Drop .sh suffix */
376 strcpy(stpcpy(r, name) - 3, ".service");
377 else
378 /* Normal init script name */
379 strcpy(stpcpy(r, name), ".service");
380
381 return r;
382 }
383
384 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
385
386 /* We silently ignore the $ prefix here. According to the LSB
387 * spec it simply indicates whether something is a
388 * standardized name or a distribution-specific one. Since we
389 * just follow what already exists and do not introduce new
390 * uses or names we don't care who introduced a new name. */
391
392 static const char * const table[] = {
393 /* LSB defined facilities */
394 "local_fs", NULL,
395 "network", SPECIAL_NETWORK_TARGET,
396 "named", SPECIAL_NSS_LOOKUP_TARGET,
397 "portmap", SPECIAL_RPCBIND_TARGET,
398 "remote_fs", SPECIAL_REMOTE_FS_TARGET,
399 "syslog", NULL,
400 "time", SPECIAL_TIME_SYNC_TARGET,
401 };
402
403 unsigned i;
404 char *r;
405 const char *n;
406
407 assert(name);
408 assert(_r);
409
410 n = *name == '$' ? name + 1 : name;
411
412 for (i = 0; i < ELEMENTSOF(table); i += 2) {
413
414 if (!streq(table[i], n))
415 continue;
416
417 if (!table[i+1])
418 return 0;
419
420 r = strdup(table[i+1]);
421 if (!r)
422 return log_oom();
423
424 goto finish;
425 }
426
427 /* If we don't know this name, fallback heuristics to figure
428 * out whether something is a target or a service alias. */
429
430 if (*name == '$') {
431 if (!unit_prefix_is_valid(n))
432 return -EINVAL;
433
434 /* Facilities starting with $ are most likely targets */
435 r = unit_name_build(n, NULL, ".target");
436 } else if (filename && streq(name, filename))
437 /* Names equaling the file name of the services are redundant */
438 return 0;
439 else
440 /* Everything else we assume to be normal service names */
441 r = sysv_translate_name(n);
442
443 if (!r)
444 return -ENOMEM;
445
446 finish:
447 *_r = r;
448
449 return 1;
450 }
451
452 static int sysv_fix_order(Service *s) {
453 Unit *other;
454 int r;
455
456 assert(s);
457
458 if (s->sysv_start_priority < 0)
459 return 0;
460
461 /* For each pair of services where at least one lacks a LSB
462 * header, we use the start priority value to order things. */
463
464 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
465 Service *t;
466 UnitDependency d;
467 bool special_s, special_t;
468
469 t = SERVICE(other);
470
471 if (s == t)
472 continue;
473
474 if (UNIT(t)->load_state != UNIT_LOADED)
475 continue;
476
477 if (t->sysv_start_priority < 0)
478 continue;
479
480 /* If both units have modern headers we don't care
481 * about the priorities */
482 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
483 (UNIT(t)->fragment_path || t->sysv_has_lsb))
484 continue;
485
486 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
487 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
488
489 if (special_t && !special_s)
490 d = UNIT_AFTER;
491 else if (special_s && !special_t)
492 d = UNIT_BEFORE;
493 else if (t->sysv_start_priority < s->sysv_start_priority)
494 d = UNIT_AFTER;
495 else if (t->sysv_start_priority > s->sysv_start_priority)
496 d = UNIT_BEFORE;
497 else
498 continue;
499
500 /* FIXME: Maybe we should compare the name here lexicographically? */
501
502 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
503 return r;
504 }
505
506 return 0;
507 }
508
509 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
510 ExecCommand *c;
511
512 if (!(c = new0(ExecCommand, 1)))
513 return NULL;
514
515 if (!(c->path = strdup(path))) {
516 free(c);
517 return NULL;
518 }
519
520 if (!(c->argv = strv_new(path, arg1, NULL))) {
521 free(c->path);
522 free(c);
523 return NULL;
524 }
525
526 return c;
527 }
528
529 static int sysv_exec_commands(Service *s, const bool supports_reload) {
530 ExecCommand *c;
531
532 assert(s);
533 assert(s->is_sysv);
534 assert(UNIT(s)->source_path);
535
536 c = exec_command_new(UNIT(s)->source_path, "start");
537 if (!c)
538 return -ENOMEM;
539 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
540
541 c = exec_command_new(UNIT(s)->source_path, "stop");
542 if (!c)
543 return -ENOMEM;
544 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
545
546 if (supports_reload) {
547 c = exec_command_new(UNIT(s)->source_path, "reload");
548 if (!c)
549 return -ENOMEM;
550 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
551 }
552
553 return 0;
554 }
555
556 static bool usage_contains_reload(const char *line) {
557 return (strcasestr(line, "{reload|") ||
558 strcasestr(line, "{reload}") ||
559 strcasestr(line, "{reload\"") ||
560 strcasestr(line, "|reload|") ||
561 strcasestr(line, "|reload}") ||
562 strcasestr(line, "|reload\""));
563 }
564
565 static int service_load_sysv_path(Service *s, const char *path) {
566 FILE *f;
567 Unit *u;
568 unsigned line = 0;
569 int r;
570 enum {
571 NORMAL,
572 DESCRIPTION,
573 LSB,
574 LSB_DESCRIPTION,
575 USAGE_CONTINUATION
576 } state = NORMAL;
577 char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
578 struct stat st;
579 bool supports_reload = false;
580
581 assert(s);
582 assert(path);
583
584 u = UNIT(s);
585
586 f = fopen(path, "re");
587 if (!f) {
588 r = errno == ENOENT ? 0 : -errno;
589 goto finish;
590 }
591
592 if (fstat(fileno(f), &st) < 0) {
593 r = -errno;
594 goto finish;
595 }
596
597 free(u->source_path);
598 u->source_path = strdup(path);
599 if (!u->source_path) {
600 r = -ENOMEM;
601 goto finish;
602 }
603 u->source_mtime = timespec_load(&st.st_mtim);
604
605 if (null_or_empty(&st)) {
606 u->load_state = UNIT_MASKED;
607 r = 0;
608 goto finish;
609 }
610
611 s->is_sysv = true;
612
613 while (!feof(f)) {
614 char l[LINE_MAX], *t;
615
616 if (!fgets(l, sizeof(l), f)) {
617 if (feof(f))
618 break;
619
620 r = -errno;
621 log_error_unit(u->id,
622 "Failed to read configuration file '%s': %s",
623 path, strerror(-r));
624 goto finish;
625 }
626
627 line++;
628
629 t = strstrip(l);
630 if (*t != '#') {
631 /* Try to figure out whether this init script supports
632 * the reload operation. This heuristic looks for
633 * "Usage" lines which include the reload option. */
634 if ( state == USAGE_CONTINUATION ||
635 (state == NORMAL && strcasestr(t, "usage"))) {
636 if (usage_contains_reload(t)) {
637 supports_reload = true;
638 state = NORMAL;
639 } else if (t[strlen(t)-1] == '\\')
640 state = USAGE_CONTINUATION;
641 else
642 state = NORMAL;
643 }
644
645 continue;
646 }
647
648 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
649 state = LSB;
650 s->sysv_has_lsb = true;
651 continue;
652 }
653
654 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
655 state = NORMAL;
656 continue;
657 }
658
659 t++;
660 t += strspn(t, WHITESPACE);
661
662 if (state == NORMAL) {
663
664 /* Try to parse Red Hat style chkconfig headers */
665
666 if (startswith_no_case(t, "chkconfig:")) {
667 int start_priority;
668 char runlevels[16], *k;
669
670 state = NORMAL;
671
672 if (sscanf(t+10, "%15s %i %*i", runlevels, &start_priority) != 2) {
673 log_warning_unit(u->id, "[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
674 continue;
675 }
676
677 /* A start priority gathered from the
678 * symlink farms is preferred over the
679 * data from the LSB header. */
680 if (start_priority < 0 || start_priority > 99)
681 log_warning_unit(u->id, "[%s:%u] Start priority out of range. Ignoring.", path, line);
682 else
683 log_debug_unit(u->id, "[%s:%u] Ignoring start priority set in the chkconfig file.", path, line);
684
685 char_array_0(runlevels);
686 k = delete_chars(runlevels, WHITESPACE "-");
687 if (k[0]) {
688 char *d;
689
690 d = strdup(k);
691 if (!d) {
692 r = -ENOMEM;
693 goto finish;
694 }
695
696 free(s->sysv_runlevels);
697 s->sysv_runlevels = d;
698 }
699
700 } else if (startswith_no_case(t, "description:")) {
701
702 size_t k = strlen(t);
703 char *d;
704 const char *j;
705
706 if (t[k-1] == '\\') {
707 state = DESCRIPTION;
708 t[k-1] = 0;
709 }
710
711 if ((j = strstrip(t+12)) && *j) {
712 if (!(d = strdup(j))) {
713 r = -ENOMEM;
714 goto finish;
715 }
716 } else
717 d = NULL;
718
719 free(chkconfig_description);
720 chkconfig_description = d;
721
722 } else if (startswith_no_case(t, "pidfile:")) {
723
724 char *fn;
725
726 state = NORMAL;
727
728 fn = strstrip(t+8);
729 if (!path_is_absolute(fn)) {
730 log_warning_unit(u->id,
731 "[%s:%u] PID file not absolute. Ignoring.",
732 path, line);
733 continue;
734 }
735
736 if (!(fn = strdup(fn))) {
737 r = -ENOMEM;
738 goto finish;
739 }
740
741 free(s->pid_file);
742 s->pid_file = fn;
743 }
744
745 } else if (state == DESCRIPTION) {
746
747 /* Try to parse Red Hat style description
748 * continuation */
749
750 size_t k = strlen(t);
751 char *j;
752
753 if (t[k-1] == '\\')
754 t[k-1] = 0;
755 else
756 state = NORMAL;
757
758 if ((j = strstrip(t)) && *j) {
759 char *d = NULL;
760
761 if (chkconfig_description)
762 d = strjoin(chkconfig_description, " ", j, NULL);
763 else
764 d = strdup(j);
765
766 if (!d) {
767 r = -ENOMEM;
768 goto finish;
769 }
770
771 free(chkconfig_description);
772 chkconfig_description = d;
773 }
774
775 } else if (state == LSB || state == LSB_DESCRIPTION) {
776
777 if (startswith_no_case(t, "Provides:")) {
778 char *i, *w;
779 size_t z;
780
781 state = LSB;
782
783 FOREACH_WORD_QUOTED(w, z, t+9, i) {
784 char *n, *m;
785
786 if (!(n = strndup(w, z))) {
787 r = -ENOMEM;
788 goto finish;
789 }
790
791 r = sysv_translate_facility(n, basename(path), &m);
792 free(n);
793
794 if (r < 0)
795 goto finish;
796
797 if (r == 0)
798 continue;
799
800 if (unit_name_to_type(m) == UNIT_SERVICE)
801 r = unit_merge_by_name(u, m);
802 else
803 /* NB: SysV targets
804 * which are provided
805 * by a service are
806 * pulled in by the
807 * services, as an
808 * indication that the
809 * generic service is
810 * now available. This
811 * is strictly
812 * one-way. The
813 * targets do NOT pull
814 * in the SysV
815 * services! */
816 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
817
818 if (r < 0)
819 log_error_unit(u->id,
820 "[%s:%u] Failed to add LSB Provides name %s, ignoring: %s",
821 path, line, m, strerror(-r));
822
823 free(m);
824 }
825
826 } else if (startswith_no_case(t, "Required-Start:") ||
827 startswith_no_case(t, "Should-Start:") ||
828 startswith_no_case(t, "X-Start-Before:") ||
829 startswith_no_case(t, "X-Start-After:")) {
830 char *i, *w;
831 size_t z;
832
833 state = LSB;
834
835 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
836 char *n, *m;
837
838 if (!(n = strndup(w, z))) {
839 r = -ENOMEM;
840 goto finish;
841 }
842
843 r = sysv_translate_facility(n, basename(path), &m);
844 if (r < 0) {
845 log_error_unit(u->id,
846 "[%s:%u] Failed to translate LSB dependency %s, ignoring: %s",
847 path, line, n, strerror(-r));
848 free(n);
849 continue;
850 }
851
852 free(n);
853
854 if (r == 0)
855 continue;
856
857 r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
858
859 if (r < 0)
860 log_error_unit(u->id, "[%s:%u] Failed to add dependency on %s, ignoring: %s",
861 path, line, m, strerror(-r));
862
863 free(m);
864 }
865 } else if (startswith_no_case(t, "Default-Start:")) {
866 char *k, *d;
867
868 state = LSB;
869
870 k = delete_chars(t+14, WHITESPACE "-");
871
872 if (k[0] != 0) {
873 if (!(d = strdup(k))) {
874 r = -ENOMEM;
875 goto finish;
876 }
877
878 free(s->sysv_runlevels);
879 s->sysv_runlevels = d;
880 }
881
882 } else if (startswith_no_case(t, "Description:")) {
883 char *d, *j;
884
885 state = LSB_DESCRIPTION;
886
887 if ((j = strstrip(t+12)) && *j) {
888 if (!(d = strdup(j))) {
889 r = -ENOMEM;
890 goto finish;
891 }
892 } else
893 d = NULL;
894
895 free(long_description);
896 long_description = d;
897
898 } else if (startswith_no_case(t, "Short-Description:")) {
899 char *d, *j;
900
901 state = LSB;
902
903 if ((j = strstrip(t+18)) && *j) {
904 if (!(d = strdup(j))) {
905 r = -ENOMEM;
906 goto finish;
907 }
908 } else
909 d = NULL;
910
911 free(short_description);
912 short_description = d;
913
914 } else if (state == LSB_DESCRIPTION) {
915
916 if (startswith(l, "#\t") || startswith(l, "# ")) {
917 char *j;
918
919 if ((j = strstrip(t)) && *j) {
920 char *d = NULL;
921
922 if (long_description)
923 d = strjoin(long_description, " ", t, NULL);
924 else
925 d = strdup(j);
926
927 if (!d) {
928 r = -ENOMEM;
929 goto finish;
930 }
931
932 free(long_description);
933 long_description = d;
934 }
935
936 } else
937 state = LSB;
938 }
939 }
940 }
941
942 if ((r = sysv_exec_commands(s, supports_reload)) < 0)
943 goto finish;
944
945 if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
946 /* If there a runlevels configured for this service
947 * but none of the standard ones, then we assume this
948 * is some special kind of service (which might be
949 * needed for early boot) and don't create any links
950 * to it. */
951
952 UNIT(s)->default_dependencies = false;
953
954 /* Don't timeout special services during boot (like fsck) */
955 s->timeout_start_usec = 0;
956 s->timeout_stop_usec = 0;
957 } else {
958 s->timeout_start_usec = DEFAULT_SYSV_TIMEOUT_USEC;
959 s->timeout_stop_usec = DEFAULT_SYSV_TIMEOUT_USEC;
960 }
961
962 /* Special setting for all SysV services */
963 s->type = SERVICE_FORKING;
964 s->remain_after_exit = !s->pid_file;
965 s->guess_main_pid = false;
966 s->restart = SERVICE_RESTART_NO;
967 s->exec_context.ignore_sigpipe = false;
968 s->kill_context.kill_mode = KILL_PROCESS;
969
970 /* We use the long description only if
971 * no short description is set. */
972
973 if (short_description)
974 description = short_description;
975 else if (chkconfig_description)
976 description = chkconfig_description;
977 else if (long_description)
978 description = long_description;
979 else
980 description = NULL;
981
982 if (description) {
983 char *d;
984
985 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
986 r = -ENOMEM;
987 goto finish;
988 }
989
990 u->description = d;
991 }
992
993 /* Initialize the start priority from what has been set in the
994 * /etc/rcN.d/ hierarchies if we load the unit file as SysV
995 * init script. */
996 if (s->sysv_start_priority_from_rcnd >= 0)
997 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
998
999 u->load_state = UNIT_LOADED;
1000 r = 0;
1001
1002 finish:
1003
1004 if (f)
1005 fclose(f);
1006
1007 free(short_description);
1008 free(long_description);
1009 free(chkconfig_description);
1010
1011 return r;
1012 }
1013
1014 static int service_load_sysv_name(Service *s, const char *name) {
1015 char **p;
1016
1017 assert(s);
1018 assert(name);
1019
1020 /* For SysV services we strip the *.sh suffixes. */
1021 if (endswith(name, ".sh.service"))
1022 return -ENOENT;
1023
1024 STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
1025 char *path;
1026 int r;
1027
1028 path = strjoin(*p, "/", name, NULL);
1029 if (!path)
1030 return -ENOMEM;
1031
1032 assert(endswith(path, ".service"));
1033 path[strlen(path)-8] = 0;
1034
1035 r = service_load_sysv_path(s, path);
1036
1037 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1038 /* Try *.sh source'able init scripts */
1039 strcat(path, ".sh");
1040 r = service_load_sysv_path(s, path);
1041 }
1042 free(path);
1043
1044 if (r < 0)
1045 return r;
1046
1047 if (UNIT(s)->load_state != UNIT_STUB)
1048 break;
1049 }
1050
1051 return 0;
1052 }
1053
1054 static int service_load_sysv(Service *s) {
1055 const char *t;
1056 Iterator i;
1057 int r;
1058
1059 assert(s);
1060
1061 /* Load service data from SysV init scripts, preferably with
1062 * LSB headers ... */
1063
1064 if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1065 return 0;
1066
1067 if ((t = UNIT(s)->id))
1068 if ((r = service_load_sysv_name(s, t)) < 0)
1069 return r;
1070
1071 if (UNIT(s)->load_state == UNIT_STUB)
1072 SET_FOREACH(t, UNIT(s)->names, i) {
1073 if (t == UNIT(s)->id)
1074 continue;
1075
1076 if ((r = service_load_sysv_name(s, t)) < 0)
1077 return r;
1078
1079 if (UNIT(s)->load_state != UNIT_STUB)
1080 break;
1081 }
1082
1083 return 0;
1084 }
1085 #endif
1086
1087 static int service_verify(Service *s) {
1088 assert(s);
1089
1090 if (UNIT(s)->load_state != UNIT_LOADED)
1091 return 0;
1092
1093 if (!s->exec_command[SERVICE_EXEC_START]) {
1094 log_error_unit(UNIT(s)->id, "%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1095 return -EINVAL;
1096 }
1097
1098 if (s->type != SERVICE_ONESHOT &&
1099 s->exec_command[SERVICE_EXEC_START]->command_next) {
1100 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);
1101 return -EINVAL;
1102 }
1103
1104 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
1105 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);
1106 return -EINVAL;
1107 }
1108
1109 if (s->type == SERVICE_DBUS && !s->bus_name) {
1110 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);
1111 return -EINVAL;
1112 }
1113
1114 if (s->bus_name && s->type != SERVICE_DBUS)
1115 log_warning_unit(UNIT(s)->id, "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
1116
1117 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
1118 log_error_unit(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.", UNIT(s)->id);
1119 return -EINVAL;
1120 }
1121
1122 return 0;
1123 }
1124
1125 static int service_add_default_dependencies(Service *s) {
1126 int r;
1127
1128 assert(s);
1129
1130 /* Add a number of automatic dependencies useful for the
1131 * majority of services. */
1132
1133 /* First, pull in base system */
1134 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1135 SPECIAL_BASIC_TARGET, NULL, true);
1136 if (r < 0)
1137 return r;
1138
1139 /* Second, activate normal shutdown */
1140 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS,
1141 SPECIAL_SHUTDOWN_TARGET, NULL, true);
1142 return r;
1143 }
1144
1145 static void service_fix_output(Service *s) {
1146 assert(s);
1147
1148 /* If nothing has been explicitly configured, patch default
1149 * output in. If input is socket/tty we avoid this however,
1150 * since in that case we want output to default to the same
1151 * place as we read input from. */
1152
1153 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1154 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1155 s->exec_context.std_input == EXEC_INPUT_NULL)
1156 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1157
1158 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1159 s->exec_context.std_input == EXEC_INPUT_NULL)
1160 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1161 }
1162
1163 static int service_load(Unit *u) {
1164 int r;
1165 Service *s = SERVICE(u);
1166
1167 assert(s);
1168
1169 /* Load a .service file */
1170 r = unit_load_fragment(u);
1171 if (r < 0)
1172 return r;
1173
1174 #ifdef HAVE_SYSV_COMPAT
1175 /* Load a classic init script as a fallback, if we couldn't find anything */
1176 if (u->load_state == UNIT_STUB) {
1177 r = service_load_sysv(s);
1178 if (r < 0)
1179 return r;
1180 }
1181 #endif
1182
1183 /* Still nothing found? Then let's give up */
1184 if (u->load_state == UNIT_STUB)
1185 return -ENOENT;
1186
1187 /* This is a new unit? Then let's add in some extras */
1188 if (u->load_state == UNIT_LOADED) {
1189
1190 /* We were able to load something, then let's add in
1191 * the dropin directories. */
1192 r = unit_load_dropin(u);
1193 if (r < 0)
1194 return r;
1195
1196 if (s->type == _SERVICE_TYPE_INVALID)
1197 s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
1198
1199 /* Oneshot services have disabled start timeout by default */
1200 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
1201 s->timeout_start_usec = 0;
1202
1203 service_fix_output(s);
1204
1205 r = unit_patch_contexts(u);
1206 if (r < 0)
1207 return r;
1208
1209 r = unit_add_exec_dependencies(u, &s->exec_context);
1210 if (r < 0)
1211 return r;
1212
1213 r = unit_add_default_slice(u, &s->cgroup_context);
1214 if (r < 0)
1215 return r;
1216
1217 #ifdef HAVE_SYSV_COMPAT
1218 r = sysv_fix_order(s);
1219 if (r < 0)
1220 return r;
1221 #endif
1222
1223 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1224 s->notify_access = NOTIFY_MAIN;
1225
1226 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1227 s->notify_access = NOTIFY_MAIN;
1228
1229 if (s->bus_name) {
1230 r = unit_watch_bus_name(u, s->bus_name);
1231 if (r < 0)
1232 return r;
1233 }
1234
1235 if (u->default_dependencies) {
1236 r = service_add_default_dependencies(s);
1237 if (r < 0)
1238 return r;
1239 }
1240 }
1241
1242 return service_verify(s);
1243 }
1244
1245 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1246
1247 ServiceExecCommand c;
1248 Service *s = SERVICE(u);
1249 const char *prefix2;
1250 _cleanup_free_ char *p2 = NULL;
1251
1252 assert(s);
1253
1254 p2 = strappend(prefix, "\t");
1255 prefix2 = p2 ? p2 : prefix;
1256
1257 fprintf(f,
1258 "%sService State: %s\n"
1259 "%sResult: %s\n"
1260 "%sReload Result: %s\n"
1261 "%sPermissionsStartOnly: %s\n"
1262 "%sRootDirectoryStartOnly: %s\n"
1263 "%sRemainAfterExit: %s\n"
1264 "%sGuessMainPID: %s\n"
1265 "%sType: %s\n"
1266 "%sRestart: %s\n"
1267 "%sNotifyAccess: %s\n",
1268 prefix, service_state_to_string(s->state),
1269 prefix, service_result_to_string(s->result),
1270 prefix, service_result_to_string(s->reload_result),
1271 prefix, yes_no(s->permissions_start_only),
1272 prefix, yes_no(s->root_directory_start_only),
1273 prefix, yes_no(s->remain_after_exit),
1274 prefix, yes_no(s->guess_main_pid),
1275 prefix, service_type_to_string(s->type),
1276 prefix, service_restart_to_string(s->restart),
1277 prefix, notify_access_to_string(s->notify_access));
1278
1279 if (s->control_pid > 0)
1280 fprintf(f,
1281 "%sControl PID: "PID_FMT"\n",
1282 prefix, s->control_pid);
1283
1284 if (s->main_pid > 0)
1285 fprintf(f,
1286 "%sMain PID: "PID_FMT"\n"
1287 "%sMain PID Known: %s\n"
1288 "%sMain PID Alien: %s\n",
1289 prefix, s->main_pid,
1290 prefix, yes_no(s->main_pid_known),
1291 prefix, yes_no(s->main_pid_alien));
1292
1293 if (s->pid_file)
1294 fprintf(f,
1295 "%sPIDFile: %s\n",
1296 prefix, s->pid_file);
1297
1298 if (s->bus_name)
1299 fprintf(f,
1300 "%sBusName: %s\n"
1301 "%sBus Name Good: %s\n",
1302 prefix, s->bus_name,
1303 prefix, yes_no(s->bus_name_good));
1304
1305 kill_context_dump(&s->kill_context, f, prefix);
1306 exec_context_dump(&s->exec_context, f, prefix);
1307
1308 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1309
1310 if (!s->exec_command[c])
1311 continue;
1312
1313 fprintf(f, "%s-> %s:\n",
1314 prefix, service_exec_command_to_string(c));
1315
1316 exec_command_dump_list(s->exec_command[c], f, prefix2);
1317 }
1318
1319 #ifdef HAVE_SYSV_COMPAT
1320 if (s->is_sysv)
1321 fprintf(f,
1322 "%sSysV Init Script has LSB Header: %s\n"
1323 "%sSysVEnabled: %s\n",
1324 prefix, yes_no(s->sysv_has_lsb),
1325 prefix, yes_no(s->sysv_enabled));
1326
1327 if (s->sysv_start_priority >= 0)
1328 fprintf(f,
1329 "%sSysVStartPriority: %i\n",
1330 prefix, s->sysv_start_priority);
1331
1332 if (s->sysv_runlevels)
1333 fprintf(f, "%sSysVRunLevels: %s\n",
1334 prefix, s->sysv_runlevels);
1335 #endif
1336
1337 if (s->status_text)
1338 fprintf(f, "%sStatus Text: %s\n",
1339 prefix, s->status_text);
1340 }
1341
1342 static int service_load_pid_file(Service *s, bool may_warn) {
1343 _cleanup_free_ char *k = NULL;
1344 int r;
1345 pid_t pid;
1346
1347 assert(s);
1348
1349 if (!s->pid_file)
1350 return -ENOENT;
1351
1352 r = read_one_line_file(s->pid_file, &k);
1353 if (r < 0) {
1354 if (may_warn)
1355 log_info_unit(UNIT(s)->id,
1356 "PID file %s not readable (yet?) after %s.",
1357 s->pid_file, service_state_to_string(s->state));
1358 return r;
1359 }
1360
1361 r = parse_pid(k, &pid);
1362 if (r < 0) {
1363 if (may_warn)
1364 log_info_unit(UNIT(s)->id,
1365 "Failed to read PID from file %s: %s",
1366 s->pid_file, strerror(-r));
1367 return r;
1368 }
1369
1370 if (!pid_is_alive(pid)) {
1371 if (may_warn)
1372 log_info_unit(UNIT(s)->id, "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
1373
1374 return -ESRCH;
1375 }
1376
1377 if (s->main_pid_known) {
1378 if (pid == s->main_pid)
1379 return 0;
1380
1381 log_debug_unit(UNIT(s)->id,
1382 "Main PID changing: "PID_FMT" -> "PID_FMT,
1383 s->main_pid, pid);
1384 service_unwatch_main_pid(s);
1385 s->main_pid_known = false;
1386 } else
1387 log_debug_unit(UNIT(s)->id,
1388 "Main PID loaded: "PID_FMT, pid);
1389
1390 r = service_set_main_pid(s, pid);
1391 if (r < 0)
1392 return r;
1393
1394 r = unit_watch_pid(UNIT(s), pid);
1395 if (r < 0) {
1396 /* FIXME: we need to do something here */
1397 log_warning_unit(UNIT(s)->id,
1398 "Failed to watch PID "PID_FMT" from service %s",
1399 pid, UNIT(s)->id);
1400 return r;
1401 }
1402
1403 return 0;
1404 }
1405
1406 static int service_search_main_pid(Service *s) {
1407 pid_t pid;
1408 int r;
1409
1410 assert(s);
1411
1412 /* If we know it anyway, don't ever fallback to unreliable
1413 * heuristics */
1414 if (s->main_pid_known)
1415 return 0;
1416
1417 if (!s->guess_main_pid)
1418 return 0;
1419
1420 assert(s->main_pid <= 0);
1421
1422 pid = unit_search_main_pid(UNIT(s));
1423 if (pid <= 0)
1424 return -ENOENT;
1425
1426 log_debug_unit(UNIT(s)->id,
1427 "Main PID guessed: "PID_FMT, pid);
1428 r = service_set_main_pid(s, pid);
1429 if (r < 0)
1430 return r;
1431
1432 r = unit_watch_pid(UNIT(s), pid);
1433 if (r < 0)
1434 /* FIXME: we need to do something here */
1435 log_warning_unit(UNIT(s)->id,
1436 "Failed to watch PID "PID_FMT" from service %s",
1437 pid, UNIT(s)->id);
1438 return r;
1439 }
1440
1441 static void service_set_state(Service *s, ServiceState state) {
1442 ServiceState old_state;
1443 const UnitActiveState *table;
1444
1445 assert(s);
1446
1447 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1448
1449 old_state = s->state;
1450 s->state = state;
1451
1452 service_unwatch_pid_file(s);
1453
1454 if (!IN_SET(state,
1455 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1456 SERVICE_RELOAD,
1457 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1458 SERVICE_STOP_POST,
1459 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
1460 SERVICE_AUTO_RESTART))
1461 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1462
1463 if (!IN_SET(state,
1464 SERVICE_START, SERVICE_START_POST,
1465 SERVICE_RUNNING, SERVICE_RELOAD,
1466 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1467 SERVICE_STOP_POST,
1468 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1469 service_unwatch_main_pid(s);
1470 s->main_command = NULL;
1471 }
1472
1473 if (!IN_SET(state,
1474 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1475 SERVICE_RELOAD,
1476 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1477 SERVICE_STOP_POST,
1478 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1479 service_unwatch_control_pid(s);
1480 s->control_command = NULL;
1481 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1482 }
1483
1484 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1485 unit_unwatch_all_pids(UNIT(s));
1486
1487 if (!IN_SET(state,
1488 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1489 SERVICE_RUNNING, SERVICE_RELOAD,
1490 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1491 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
1492 !(state == SERVICE_DEAD && UNIT(s)->job)) {
1493 service_close_socket_fd(s);
1494 service_connection_unref(s);
1495 }
1496
1497 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1498 service_stop_watchdog(s);
1499
1500 /* For the inactive states unit_notify() will trim the cgroup,
1501 * but for exit we have to do that ourselves... */
1502 if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1503 unit_destroy_cgroup(UNIT(s));
1504
1505 /* For remain_after_exit services, let's see if we can "release" the
1506 * hold on the console, since unit_notify() only does that in case of
1507 * change of state */
1508 if (state == SERVICE_EXITED && s->remain_after_exit &&
1509 UNIT(s)->manager->n_on_console > 0) {
1510 ExecContext *ec = unit_get_exec_context(UNIT(s));
1511 if (ec && exec_context_may_touch_console(ec)) {
1512 Manager *m = UNIT(s)->manager;
1513
1514 m->n_on_console --;
1515 if (m->n_on_console == 0)
1516 /* unset no_console_output flag, since the console is free */
1517 m->no_console_output = false;
1518 }
1519 }
1520
1521 if (old_state != state)
1522 log_debug_unit(UNIT(s)->id, "%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
1523
1524 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1525 s->reload_result = SERVICE_SUCCESS;
1526 }
1527
1528 static int service_coldplug(Unit *u) {
1529 Service *s = SERVICE(u);
1530 int r;
1531
1532 assert(s);
1533 assert(s->state == SERVICE_DEAD);
1534
1535 if (s->deserialized_state != s->state) {
1536
1537 if (IN_SET(s->deserialized_state,
1538 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1539 SERVICE_RELOAD,
1540 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1541 SERVICE_STOP_POST,
1542 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1543
1544 usec_t k;
1545
1546 k = IN_SET(s->deserialized_state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec;
1547
1548 /* For the start/stop timeouts 0 means off */
1549 if (k > 0) {
1550 r = service_arm_timer(s, k);
1551 if (r < 0)
1552 return r;
1553 }
1554 }
1555
1556 if (s->deserialized_state == SERVICE_AUTO_RESTART) {
1557
1558 /* The restart timeouts 0 means immediately */
1559 r = service_arm_timer(s, s->restart_usec);
1560 if (r < 0)
1561 return r;
1562 }
1563
1564 if (pid_is_unwaited(s->main_pid) &&
1565 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
1566 IN_SET(s->deserialized_state,
1567 SERVICE_START, SERVICE_START_POST,
1568 SERVICE_RUNNING, SERVICE_RELOAD,
1569 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1570 SERVICE_STOP_POST,
1571 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1572 r = unit_watch_pid(UNIT(s), s->main_pid);
1573 if (r < 0)
1574 return r;
1575 }
1576
1577 if (pid_is_unwaited(s->control_pid) &&
1578 IN_SET(s->deserialized_state,
1579 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1580 SERVICE_RELOAD,
1581 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1582 SERVICE_STOP_POST,
1583 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1584 r = unit_watch_pid(UNIT(s), s->control_pid);
1585 if (r < 0)
1586 return r;
1587 }
1588
1589 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1590 unit_watch_all_pids(UNIT(s));
1591
1592 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1593 service_start_watchdog(s);
1594
1595 service_set_state(s, s->deserialized_state);
1596 }
1597
1598 return 0;
1599 }
1600
1601 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1602 Iterator i;
1603 int r;
1604 int *rfds = NULL;
1605 unsigned rn_fds = 0;
1606 Unit *u;
1607
1608 assert(s);
1609 assert(fds);
1610 assert(n_fds);
1611
1612 if (s->socket_fd >= 0)
1613 return 0;
1614
1615 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1616 int *cfds;
1617 unsigned cn_fds;
1618 Socket *sock;
1619
1620 if (u->type != UNIT_SOCKET)
1621 continue;
1622
1623 sock = SOCKET(u);
1624
1625 r = socket_collect_fds(sock, &cfds, &cn_fds);
1626 if (r < 0)
1627 goto fail;
1628
1629 if (!cfds)
1630 continue;
1631
1632 if (!rfds) {
1633 rfds = cfds;
1634 rn_fds = cn_fds;
1635 } else {
1636 int *t;
1637
1638 t = new(int, rn_fds+cn_fds);
1639 if (!t) {
1640 free(cfds);
1641 r = -ENOMEM;
1642 goto fail;
1643 }
1644
1645 memcpy(t, rfds, rn_fds * sizeof(int));
1646 memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1647 free(rfds);
1648 free(cfds);
1649
1650 rfds = t;
1651 rn_fds = rn_fds+cn_fds;
1652 }
1653 }
1654
1655 *fds = rfds;
1656 *n_fds = rn_fds;
1657
1658 return 0;
1659
1660 fail:
1661 free(rfds);
1662
1663 return r;
1664 }
1665
1666 static int service_spawn(
1667 Service *s,
1668 ExecCommand *c,
1669 bool timeout,
1670 bool pass_fds,
1671 bool apply_permissions,
1672 bool apply_chroot,
1673 bool apply_tty_stdin,
1674 bool set_notify_socket,
1675 bool is_control,
1676 pid_t *_pid) {
1677
1678 pid_t pid;
1679 int r;
1680 int *fds = NULL;
1681 _cleanup_free_ int *fdsbuf = NULL;
1682 unsigned n_fds = 0, n_env = 0;
1683 _cleanup_strv_free_ char
1684 **argv = NULL, **final_env = NULL, **our_env = NULL;
1685 const char *path;
1686
1687 assert(s);
1688 assert(c);
1689 assert(_pid);
1690
1691 unit_realize_cgroup(UNIT(s));
1692
1693 r = unit_setup_exec_runtime(UNIT(s));
1694 if (r < 0)
1695 goto fail;
1696
1697 if (pass_fds ||
1698 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1699 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1700 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1701
1702 if (s->socket_fd >= 0) {
1703 fds = &s->socket_fd;
1704 n_fds = 1;
1705 } else {
1706 r = service_collect_fds(s, &fdsbuf, &n_fds);
1707 if (r < 0)
1708 goto fail;
1709
1710 fds = fdsbuf;
1711 }
1712 }
1713
1714 if (timeout && s->timeout_start_usec > 0) {
1715 r = service_arm_timer(s, s->timeout_start_usec);
1716 if (r < 0)
1717 goto fail;
1718 } else
1719 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1720
1721 r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
1722 if (r < 0)
1723 goto fail;
1724
1725 our_env = new0(char*, 4);
1726 if (!our_env) {
1727 r = -ENOMEM;
1728 goto fail;
1729 }
1730
1731 if (set_notify_socket)
1732 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1733 r = -ENOMEM;
1734 goto fail;
1735 }
1736
1737 if (s->main_pid > 0)
1738 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0) {
1739 r = -ENOMEM;
1740 goto fail;
1741 }
1742
1743 if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
1744 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0) {
1745 r = -ENOMEM;
1746 goto fail;
1747 }
1748
1749 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1750 if (!final_env) {
1751 r = -ENOMEM;
1752 goto fail;
1753 }
1754
1755 if (is_control && UNIT(s)->cgroup_path) {
1756 path = strappenda(UNIT(s)->cgroup_path, "/control");
1757 cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1758 } else
1759 path = UNIT(s)->cgroup_path;
1760
1761 r = exec_spawn(c,
1762 argv,
1763 &s->exec_context,
1764 fds, n_fds,
1765 final_env,
1766 apply_permissions,
1767 apply_chroot,
1768 apply_tty_stdin,
1769 UNIT(s)->manager->confirm_spawn,
1770 UNIT(s)->manager->cgroup_supported,
1771 path,
1772 manager_get_runtime_prefix(UNIT(s)->manager),
1773 UNIT(s)->id,
1774 s->watchdog_usec,
1775 s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
1776 s->exec_runtime,
1777 &pid);
1778 if (r < 0)
1779 goto fail;
1780
1781 r = unit_watch_pid(UNIT(s), pid);
1782 if (r < 0)
1783 /* FIXME: we need to do something here */
1784 goto fail;
1785
1786 *_pid = pid;
1787
1788 return 0;
1789
1790 fail:
1791 if (timeout)
1792 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1793
1794 return r;
1795 }
1796
1797 static int main_pid_good(Service *s) {
1798 assert(s);
1799
1800 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1801 * don't know */
1802
1803 /* If we know the pid file, then lets just check if it is
1804 * still valid */
1805 if (s->main_pid_known) {
1806
1807 /* If it's an alien child let's check if it is still
1808 * alive ... */
1809 if (s->main_pid_alien && s->main_pid > 0)
1810 return pid_is_alive(s->main_pid);
1811
1812 /* .. otherwise assume we'll get a SIGCHLD for it,
1813 * which we really should wait for to collect exit
1814 * status and code */
1815 return s->main_pid > 0;
1816 }
1817
1818 /* We don't know the pid */
1819 return -EAGAIN;
1820 }
1821
1822 _pure_ static int control_pid_good(Service *s) {
1823 assert(s);
1824
1825 return s->control_pid > 0;
1826 }
1827
1828 static int cgroup_good(Service *s) {
1829 int r;
1830
1831 assert(s);
1832
1833 if (!UNIT(s)->cgroup_path)
1834 return 0;
1835
1836 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
1837 if (r < 0)
1838 return r;
1839
1840 return !r;
1841 }
1842
1843 static int service_execute_action(Service *s, FailureAction action, const char *reason, bool log_action_none);
1844
1845 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1846 int r;
1847 assert(s);
1848
1849 if (f != SERVICE_SUCCESS)
1850 s->result = f;
1851
1852 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1853
1854 if (s->result != SERVICE_SUCCESS)
1855 service_execute_action(s, s->failure_action, "failed", false);
1856
1857 if (allow_restart &&
1858 !s->forbid_restart &&
1859 (s->restart == SERVICE_RESTART_ALWAYS ||
1860 (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1861 (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1862 (s->restart == SERVICE_RESTART_ON_WATCHDOG && s->result == SERVICE_FAILURE_WATCHDOG) ||
1863 (s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
1864 s->result == SERVICE_FAILURE_CORE_DUMP))) &&
1865 (s->result != SERVICE_FAILURE_EXIT_CODE ||
1866 !set_contains(s->restart_ignore_status.code, INT_TO_PTR(s->main_exec_status.status))) &&
1867 (s->result != SERVICE_FAILURE_SIGNAL ||
1868 !set_contains(s->restart_ignore_status.signal, INT_TO_PTR(s->main_exec_status.status)))) {
1869
1870 r = service_arm_timer(s, s->restart_usec);
1871 if (r < 0)
1872 goto fail;
1873
1874 service_set_state(s, SERVICE_AUTO_RESTART);
1875 }
1876
1877 s->forbid_restart = false;
1878
1879 /* We want fresh tmpdirs in case service is started again immediately */
1880 exec_runtime_destroy(s->exec_runtime);
1881 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1882
1883 /* Also, remove the runtime directory in */
1884 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1885
1886 /* Try to delete the pid file. At this point it will be
1887 * out-of-date, and some software might be confused by it, so
1888 * let's remove it. */
1889 if (s->pid_file)
1890 unlink_noerrno(s->pid_file);
1891
1892 return;
1893
1894 fail:
1895 log_warning_unit(UNIT(s)->id,
1896 "%s failed to run install restart timer: %s",
1897 UNIT(s)->id, strerror(-r));
1898 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1899 }
1900
1901 static void service_enter_stop_post(Service *s, ServiceResult f) {
1902 int r;
1903 assert(s);
1904
1905 if (f != SERVICE_SUCCESS)
1906 s->result = f;
1907
1908 service_unwatch_control_pid(s);
1909 unit_watch_all_pids(UNIT(s));
1910
1911 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1912 if (s->control_command) {
1913 s->control_command_id = SERVICE_EXEC_STOP_POST;
1914
1915 r = service_spawn(s,
1916 s->control_command,
1917 true,
1918 false,
1919 !s->permissions_start_only,
1920 !s->root_directory_start_only,
1921 true,
1922 false,
1923 true,
1924 &s->control_pid);
1925 if (r < 0)
1926 goto fail;
1927
1928 service_set_state(s, SERVICE_STOP_POST);
1929 } else
1930 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1931
1932 return;
1933
1934 fail:
1935 log_warning_unit(UNIT(s)->id,
1936 "%s failed to run 'stop-post' task: %s",
1937 UNIT(s)->id, strerror(-r));
1938 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1939 }
1940
1941 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1942 int r;
1943
1944 assert(s);
1945
1946 if (f != SERVICE_SUCCESS)
1947 s->result = f;
1948
1949 unit_watch_all_pids(UNIT(s));
1950
1951 r = unit_kill_context(
1952 UNIT(s),
1953 &s->kill_context,
1954 state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM,
1955 s->main_pid,
1956 s->control_pid,
1957 s->main_pid_alien);
1958
1959 if (r < 0)
1960 goto fail;
1961
1962 if (r > 0) {
1963 if (s->timeout_stop_usec > 0) {
1964 r = service_arm_timer(s, s->timeout_stop_usec);
1965 if (r < 0)
1966 goto fail;
1967 }
1968
1969 service_set_state(s, state);
1970 } else if (state == SERVICE_STOP_SIGTERM)
1971 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1972 else if (state == SERVICE_STOP_SIGKILL)
1973 service_enter_stop_post(s, SERVICE_SUCCESS);
1974 else if (state == SERVICE_FINAL_SIGTERM)
1975 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1976 else
1977 service_enter_dead(s, SERVICE_SUCCESS, true);
1978
1979 return;
1980
1981 fail:
1982 log_warning_unit(UNIT(s)->id,
1983 "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1984
1985 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1986 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1987 else
1988 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1989 }
1990
1991 static void service_enter_stop(Service *s, ServiceResult f) {
1992 int r;
1993
1994 assert(s);
1995
1996 if (f != SERVICE_SUCCESS)
1997 s->result = f;
1998
1999 service_unwatch_control_pid(s);
2000 unit_watch_all_pids(UNIT(s));
2001
2002 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
2003 if (s->control_command) {
2004 s->control_command_id = SERVICE_EXEC_STOP;
2005
2006 r = service_spawn(s,
2007 s->control_command,
2008 true,
2009 false,
2010 !s->permissions_start_only,
2011 !s->root_directory_start_only,
2012 false,
2013 false,
2014 true,
2015 &s->control_pid);
2016 if (r < 0)
2017 goto fail;
2018
2019 service_set_state(s, SERVICE_STOP);
2020 } else
2021 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2022
2023 return;
2024
2025 fail:
2026 log_warning_unit(UNIT(s)->id,
2027 "%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2028 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2029 }
2030
2031 static void service_enter_running(Service *s, ServiceResult f) {
2032 int main_pid_ok, cgroup_ok;
2033 assert(s);
2034
2035 if (f != SERVICE_SUCCESS)
2036 s->result = f;
2037
2038 main_pid_ok = main_pid_good(s);
2039 cgroup_ok = cgroup_good(s);
2040
2041 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2042 (s->bus_name_good || s->type != SERVICE_DBUS))
2043 service_set_state(s, SERVICE_RUNNING);
2044 else if (s->remain_after_exit)
2045 service_set_state(s, SERVICE_EXITED);
2046 else
2047 service_enter_stop(s, SERVICE_SUCCESS);
2048 }
2049
2050 static void service_enter_start_post(Service *s) {
2051 int r;
2052 assert(s);
2053
2054 service_unwatch_control_pid(s);
2055 service_reset_watchdog(s);
2056
2057 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
2058 if (s->control_command) {
2059 s->control_command_id = SERVICE_EXEC_START_POST;
2060
2061 r = service_spawn(s,
2062 s->control_command,
2063 true,
2064 false,
2065 !s->permissions_start_only,
2066 !s->root_directory_start_only,
2067 false,
2068 false,
2069 true,
2070 &s->control_pid);
2071 if (r < 0)
2072 goto fail;
2073
2074 service_set_state(s, SERVICE_START_POST);
2075 } else
2076 service_enter_running(s, SERVICE_SUCCESS);
2077
2078 return;
2079
2080 fail:
2081 log_warning_unit(UNIT(s)->id,
2082 "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2083 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2084 }
2085
2086 static void service_kill_control_processes(Service *s) {
2087 char *p;
2088
2089 if (!UNIT(s)->cgroup_path)
2090 return;
2091
2092 p = strappenda(UNIT(s)->cgroup_path, "/control");
2093 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL);
2094 }
2095
2096 static void service_enter_start(Service *s) {
2097 ExecCommand *c;
2098 pid_t pid;
2099 int r;
2100
2101 assert(s);
2102
2103 assert(s->exec_command[SERVICE_EXEC_START]);
2104 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2105
2106 service_unwatch_control_pid(s);
2107 service_unwatch_main_pid(s);
2108
2109 /* We want to ensure that nobody leaks processes from
2110 * START_PRE here, so let's go on a killing spree, People
2111 * should not spawn long running processes from START_PRE. */
2112 service_kill_control_processes(s);
2113
2114 if (s->type == SERVICE_FORKING) {
2115 s->control_command_id = SERVICE_EXEC_START;
2116 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2117
2118 s->main_command = NULL;
2119 } else {
2120 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2121 s->control_command = NULL;
2122
2123 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2124 }
2125
2126 r = service_spawn(s,
2127 c,
2128 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS ||
2129 s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
2130 true,
2131 true,
2132 true,
2133 true,
2134 s->notify_access != NOTIFY_NONE,
2135 false,
2136 &pid);
2137 if (r < 0)
2138 goto fail;
2139
2140 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
2141 /* For simple services we immediately start
2142 * the START_POST binaries. */
2143
2144 service_set_main_pid(s, pid);
2145 service_enter_start_post(s);
2146
2147 } else if (s->type == SERVICE_FORKING) {
2148
2149 /* For forking services we wait until the start
2150 * process exited. */
2151
2152 s->control_pid = pid;
2153 service_set_state(s, SERVICE_START);
2154
2155 } else if (s->type == SERVICE_ONESHOT ||
2156 s->type == SERVICE_DBUS ||
2157 s->type == SERVICE_NOTIFY) {
2158
2159 /* For oneshot services we wait until the start
2160 * process exited, too, but it is our main process. */
2161
2162 /* For D-Bus services we know the main pid right away,
2163 * but wait for the bus name to appear on the
2164 * bus. Notify services are similar. */
2165
2166 service_set_main_pid(s, pid);
2167 service_set_state(s, SERVICE_START);
2168 } else
2169 assert_not_reached("Unknown service type");
2170
2171 return;
2172
2173 fail:
2174 log_warning_unit(UNIT(s)->id,
2175 "%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2176 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2177 }
2178
2179 static void service_enter_start_pre(Service *s) {
2180 int r;
2181
2182 assert(s);
2183
2184 service_unwatch_control_pid(s);
2185
2186 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
2187 if (s->control_command) {
2188 /* Before we start anything, let's clear up what might
2189 * be left from previous runs. */
2190 service_kill_control_processes(s);
2191
2192 s->control_command_id = SERVICE_EXEC_START_PRE;
2193
2194 r = service_spawn(s,
2195 s->control_command,
2196 true,
2197 false,
2198 !s->permissions_start_only,
2199 !s->root_directory_start_only,
2200 true,
2201 false,
2202 true,
2203 &s->control_pid);
2204 if (r < 0)
2205 goto fail;
2206
2207 service_set_state(s, SERVICE_START_PRE);
2208 } else
2209 service_enter_start(s);
2210
2211 return;
2212
2213 fail:
2214 log_warning_unit(UNIT(s)->id,
2215 "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2216 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2217 }
2218
2219 static void service_enter_restart(Service *s) {
2220 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
2221 int r;
2222
2223 assert(s);
2224
2225 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2226 /* Don't restart things if we are going down anyway */
2227 log_info_unit(UNIT(s)->id,
2228 "Stop job pending for unit, delaying automatic restart.");
2229
2230 r = service_arm_timer(s, s->restart_usec);
2231 if (r < 0)
2232 goto fail;
2233
2234 return;
2235 }
2236
2237 /* Any units that are bound to this service must also be
2238 * restarted. We use JOB_RESTART (instead of the more obvious
2239 * JOB_START) here so that those dependency jobs will be added
2240 * as well. */
2241 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
2242 if (r < 0)
2243 goto fail;
2244
2245 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2246 * it will be canceled as part of the service_stop() call that
2247 * is executed as part of JOB_RESTART. */
2248
2249 log_debug_unit(UNIT(s)->id,
2250 "%s scheduled restart job.", UNIT(s)->id);
2251 return;
2252
2253 fail:
2254 log_warning_unit(UNIT(s)->id,
2255 "%s failed to schedule restart job: %s",
2256 UNIT(s)->id, bus_error_message(&error, -r));
2257 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2258 }
2259
2260 static void service_enter_reload(Service *s) {
2261 int r;
2262
2263 assert(s);
2264
2265 service_unwatch_control_pid(s);
2266
2267 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2268 if (s->control_command) {
2269 s->control_command_id = SERVICE_EXEC_RELOAD;
2270
2271 r = service_spawn(s,
2272 s->control_command,
2273 true,
2274 false,
2275 !s->permissions_start_only,
2276 !s->root_directory_start_only,
2277 false,
2278 false,
2279 true,
2280 &s->control_pid);
2281 if (r < 0)
2282 goto fail;
2283
2284 service_set_state(s, SERVICE_RELOAD);
2285 } else
2286 service_enter_running(s, SERVICE_SUCCESS);
2287
2288 return;
2289
2290 fail:
2291 log_warning_unit(UNIT(s)->id,
2292 "%s failed to run 'reload' task: %s",
2293 UNIT(s)->id, strerror(-r));
2294 s->reload_result = SERVICE_FAILURE_RESOURCES;
2295 service_enter_running(s, SERVICE_SUCCESS);
2296 }
2297
2298 static void service_run_next_control(Service *s) {
2299 int r;
2300
2301 assert(s);
2302 assert(s->control_command);
2303 assert(s->control_command->command_next);
2304
2305 assert(s->control_command_id != SERVICE_EXEC_START);
2306
2307 s->control_command = s->control_command->command_next;
2308 service_unwatch_control_pid(s);
2309
2310 r = service_spawn(s,
2311 s->control_command,
2312 true,
2313 false,
2314 !s->permissions_start_only,
2315 !s->root_directory_start_only,
2316 s->control_command_id == SERVICE_EXEC_START_PRE ||
2317 s->control_command_id == SERVICE_EXEC_STOP_POST,
2318 false,
2319 true,
2320 &s->control_pid);
2321 if (r < 0)
2322 goto fail;
2323
2324 return;
2325
2326 fail:
2327 log_warning_unit(UNIT(s)->id,
2328 "%s failed to run next control task: %s",
2329 UNIT(s)->id, strerror(-r));
2330
2331 if (s->state == SERVICE_START_PRE)
2332 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2333 else if (s->state == SERVICE_STOP)
2334 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2335 else if (s->state == SERVICE_STOP_POST)
2336 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2337 else if (s->state == SERVICE_RELOAD) {
2338 s->reload_result = SERVICE_FAILURE_RESOURCES;
2339 service_enter_running(s, SERVICE_SUCCESS);
2340 } else
2341 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2342 }
2343
2344 static void service_run_next_main(Service *s) {
2345 pid_t pid;
2346 int r;
2347
2348 assert(s);
2349 assert(s->main_command);
2350 assert(s->main_command->command_next);
2351 assert(s->type == SERVICE_ONESHOT);
2352
2353 s->main_command = s->main_command->command_next;
2354 service_unwatch_main_pid(s);
2355
2356 r = service_spawn(s,
2357 s->main_command,
2358 true,
2359 true,
2360 true,
2361 true,
2362 true,
2363 s->notify_access != NOTIFY_NONE,
2364 false,
2365 &pid);
2366 if (r < 0)
2367 goto fail;
2368
2369 service_set_main_pid(s, pid);
2370
2371 return;
2372
2373 fail:
2374 log_warning_unit(UNIT(s)->id,
2375 "%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2376 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2377 }
2378
2379 static int service_execute_action(Service *s, FailureAction action, const char *reason, bool log_action_none) {
2380 assert(s);
2381
2382 if (action == SERVICE_FAILURE_ACTION_REBOOT ||
2383 action == SERVICE_FAILURE_ACTION_REBOOT_FORCE)
2384 update_reboot_param_file(s->reboot_arg);
2385
2386 switch (action) {
2387
2388 case SERVICE_FAILURE_ACTION_NONE:
2389 if (log_action_none)
2390 log_warning_unit(UNIT(s)->id,
2391 "%s %s, refusing to start.", UNIT(s)->id, reason);
2392 break;
2393
2394 case SERVICE_FAILURE_ACTION_REBOOT: {
2395 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
2396 int r;
2397
2398 log_warning_unit(UNIT(s)->id,
2399 "%s %s, rebooting.", UNIT(s)->id, reason);
2400
2401 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START,
2402 SPECIAL_REBOOT_TARGET, JOB_REPLACE,
2403 true, &error, NULL);
2404 if (r < 0)
2405 log_error_unit(UNIT(s)->id,
2406 "Failed to reboot: %s.", bus_error_message(&error, r));
2407
2408 break;
2409 }
2410
2411 case SERVICE_FAILURE_ACTION_REBOOT_FORCE:
2412 log_warning_unit(UNIT(s)->id,
2413 "%s %s, forcibly rebooting.", UNIT(s)->id, reason);
2414 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2415 break;
2416
2417 case SERVICE_FAILURE_ACTION_REBOOT_IMMEDIATE:
2418 log_warning_unit(UNIT(s)->id,
2419 "%s %s, rebooting immediately.", UNIT(s)->id, reason);
2420 sync();
2421 if (s->reboot_arg) {
2422 log_info("Rebooting with argument '%s'.", s->reboot_arg);
2423 syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
2424 LINUX_REBOOT_CMD_RESTART2, s->reboot_arg);
2425 }
2426
2427 log_info("Rebooting.");
2428 reboot(RB_AUTOBOOT);
2429 break;
2430
2431 default:
2432 log_error_unit(UNIT(s)->id,
2433 "failure action=%i", action);
2434 assert_not_reached("Unknown FailureAction.");
2435 }
2436
2437 return -ECANCELED;
2438 }
2439
2440 static int service_start_limit_test(Service *s) {
2441 assert(s);
2442
2443 if (ratelimit_test(&s->start_limit))
2444 return 0;
2445
2446 return service_execute_action(s, s->start_limit_action, "start request repeated too quickly", true);
2447 }
2448
2449 static int service_start(Unit *u) {
2450 Service *s = SERVICE(u);
2451 int r;
2452
2453 assert(s);
2454
2455 /* We cannot fulfill this request right now, try again later
2456 * please! */
2457 if (s->state == SERVICE_STOP ||
2458 s->state == SERVICE_STOP_SIGTERM ||
2459 s->state == SERVICE_STOP_SIGKILL ||
2460 s->state == SERVICE_STOP_POST ||
2461 s->state == SERVICE_FINAL_SIGTERM ||
2462 s->state == SERVICE_FINAL_SIGKILL)
2463 return -EAGAIN;
2464
2465 /* Already on it! */
2466 if (s->state == SERVICE_START_PRE ||
2467 s->state == SERVICE_START ||
2468 s->state == SERVICE_START_POST)
2469 return 0;
2470
2471 /* A service that will be restarted must be stopped first to
2472 * trigger BindsTo and/or OnFailure dependencies. If a user
2473 * does not want to wait for the holdoff time to elapse, the
2474 * service should be manually restarted, not started. We
2475 * simply return EAGAIN here, so that any start jobs stay
2476 * queued, and assume that the auto restart timer will
2477 * eventually trigger the restart. */
2478 if (s->state == SERVICE_AUTO_RESTART)
2479 return -EAGAIN;
2480
2481 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
2482
2483 /* Make sure we don't enter a busy loop of some kind. */
2484 r = service_start_limit_test(s);
2485 if (r < 0) {
2486 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
2487 return r;
2488 }
2489
2490 s->result = SERVICE_SUCCESS;
2491 s->reload_result = SERVICE_SUCCESS;
2492 s->main_pid_known = false;
2493 s->main_pid_alien = false;
2494 s->forbid_restart = false;
2495
2496 service_enter_start_pre(s);
2497 return 0;
2498 }
2499
2500 static int service_stop(Unit *u) {
2501 Service *s = SERVICE(u);
2502
2503 assert(s);
2504
2505 /* Don't create restart jobs from here. */
2506 s->forbid_restart = true;
2507
2508 /* Already on it */
2509 if (s->state == SERVICE_STOP ||
2510 s->state == SERVICE_STOP_SIGTERM ||
2511 s->state == SERVICE_STOP_SIGKILL ||
2512 s->state == SERVICE_STOP_POST ||
2513 s->state == SERVICE_FINAL_SIGTERM ||
2514 s->state == SERVICE_FINAL_SIGKILL)
2515 return 0;
2516
2517 /* A restart will be scheduled or is in progress. */
2518 if (s->state == SERVICE_AUTO_RESTART) {
2519 service_set_state(s, SERVICE_DEAD);
2520 return 0;
2521 }
2522
2523 /* If there's already something running we go directly into
2524 * kill mode. */
2525 if (s->state == SERVICE_START_PRE ||
2526 s->state == SERVICE_START ||
2527 s->state == SERVICE_START_POST ||
2528 s->state == SERVICE_RELOAD) {
2529 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2530 return 0;
2531 }
2532
2533 assert(s->state == SERVICE_RUNNING ||
2534 s->state == SERVICE_EXITED);
2535
2536 service_enter_stop(s, SERVICE_SUCCESS);
2537 return 0;
2538 }
2539
2540 static int service_reload(Unit *u) {
2541 Service *s = SERVICE(u);
2542
2543 assert(s);
2544
2545 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2546
2547 service_enter_reload(s);
2548 return 0;
2549 }
2550
2551 _pure_ static bool service_can_reload(Unit *u) {
2552 Service *s = SERVICE(u);
2553
2554 assert(s);
2555
2556 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2557 }
2558
2559 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2560 Service *s = SERVICE(u);
2561
2562 assert(u);
2563 assert(f);
2564 assert(fds);
2565
2566 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2567 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2568 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2569
2570 if (s->control_pid > 0)
2571 unit_serialize_item_format(u, f, "control-pid", PID_FMT,
2572 s->control_pid);
2573
2574 if (s->main_pid_known && s->main_pid > 0)
2575 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2576
2577 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2578
2579 if (s->status_text)
2580 unit_serialize_item(u, f, "status-text", s->status_text);
2581
2582 /* FIXME: There's a minor uncleanliness here: if there are
2583 * multiple commands attached here, we will start from the
2584 * first one again */
2585 if (s->control_command_id >= 0)
2586 unit_serialize_item(u, f, "control-command",
2587 service_exec_command_to_string(s->control_command_id));
2588
2589 if (s->socket_fd >= 0) {
2590 int copy;
2591
2592 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2593 return copy;
2594
2595 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2596 }
2597
2598 if (s->main_exec_status.pid > 0) {
2599 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT,
2600 s->main_exec_status.pid);
2601 dual_timestamp_serialize(f, "main-exec-status-start",
2602 &s->main_exec_status.start_timestamp);
2603 dual_timestamp_serialize(f, "main-exec-status-exit",
2604 &s->main_exec_status.exit_timestamp);
2605
2606 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2607 unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
2608 s->main_exec_status.code);
2609 unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
2610 s->main_exec_status.status);
2611 }
2612 }
2613 if (dual_timestamp_is_set(&s->watchdog_timestamp))
2614 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2615
2616 if (s->forbid_restart)
2617 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2618
2619 return 0;
2620 }
2621
2622 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2623 Service *s = SERVICE(u);
2624
2625 assert(u);
2626 assert(key);
2627 assert(value);
2628 assert(fds);
2629
2630 if (streq(key, "state")) {
2631 ServiceState state;
2632
2633 state = service_state_from_string(value);
2634 if (state < 0)
2635 log_debug_unit(u->id, "Failed to parse state value %s", value);
2636 else
2637 s->deserialized_state = state;
2638 } else if (streq(key, "result")) {
2639 ServiceResult f;
2640
2641 f = service_result_from_string(value);
2642 if (f < 0)
2643 log_debug_unit(u->id, "Failed to parse result value %s", value);
2644 else if (f != SERVICE_SUCCESS)
2645 s->result = f;
2646
2647 } else if (streq(key, "reload-result")) {
2648 ServiceResult f;
2649
2650 f = service_result_from_string(value);
2651 if (f < 0)
2652 log_debug_unit(u->id, "Failed to parse reload result value %s", value);
2653 else if (f != SERVICE_SUCCESS)
2654 s->reload_result = f;
2655
2656 } else if (streq(key, "control-pid")) {
2657 pid_t pid;
2658
2659 if (parse_pid(value, &pid) < 0)
2660 log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
2661 else
2662 s->control_pid = pid;
2663 } else if (streq(key, "main-pid")) {
2664 pid_t pid;
2665
2666 if (parse_pid(value, &pid) < 0)
2667 log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
2668 else {
2669 service_set_main_pid(s, pid);
2670 unit_watch_pid(UNIT(s), pid);
2671 }
2672 } else if (streq(key, "main-pid-known")) {
2673 int b;
2674
2675 b = parse_boolean(value);
2676 if (b < 0)
2677 log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
2678 else
2679 s->main_pid_known = b;
2680 } else if (streq(key, "status-text")) {
2681 char *t;
2682
2683 t = strdup(value);
2684 if (!t)
2685 log_oom();
2686 else {
2687 free(s->status_text);
2688 s->status_text = t;
2689 }
2690
2691 } else if (streq(key, "control-command")) {
2692 ServiceExecCommand id;
2693
2694 id = service_exec_command_from_string(value);
2695 if (id < 0)
2696 log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
2697 else {
2698 s->control_command_id = id;
2699 s->control_command = s->exec_command[id];
2700 }
2701 } else if (streq(key, "socket-fd")) {
2702 int fd;
2703
2704 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2705 log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
2706 else {
2707
2708 safe_close(s->socket_fd);
2709 s->socket_fd = fdset_remove(fds, fd);
2710 }
2711 } else if (streq(key, "main-exec-status-pid")) {
2712 pid_t pid;
2713
2714 if (parse_pid(value, &pid) < 0)
2715 log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
2716 else
2717 s->main_exec_status.pid = pid;
2718 } else if (streq(key, "main-exec-status-code")) {
2719 int i;
2720
2721 if (safe_atoi(value, &i) < 0)
2722 log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
2723 else
2724 s->main_exec_status.code = i;
2725 } else if (streq(key, "main-exec-status-status")) {
2726 int i;
2727
2728 if (safe_atoi(value, &i) < 0)
2729 log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
2730 else
2731 s->main_exec_status.status = i;
2732 } else if (streq(key, "main-exec-status-start"))
2733 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2734 else if (streq(key, "main-exec-status-exit"))
2735 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2736 else if (streq(key, "watchdog-timestamp"))
2737 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2738 else if (streq(key, "forbid-restart")) {
2739 int b;
2740
2741 b = parse_boolean(value);
2742 if (b < 0)
2743 log_debug_unit(u->id, "Failed to parse forbid-restart value %s", value);
2744 else
2745 s->forbid_restart = b;
2746 } else
2747 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
2748
2749 return 0;
2750 }
2751
2752 _pure_ static UnitActiveState service_active_state(Unit *u) {
2753 const UnitActiveState *table;
2754
2755 assert(u);
2756
2757 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2758
2759 return table[SERVICE(u)->state];
2760 }
2761
2762 static const char *service_sub_state_to_string(Unit *u) {
2763 assert(u);
2764
2765 return service_state_to_string(SERVICE(u)->state);
2766 }
2767
2768 static bool service_check_gc(Unit *u) {
2769 Service *s = SERVICE(u);
2770
2771 assert(s);
2772
2773 /* Never clean up services that still have a process around,
2774 * even if the service is formally dead. */
2775 if (cgroup_good(s) > 0 ||
2776 main_pid_good(s) > 0 ||
2777 control_pid_good(s) > 0)
2778 return true;
2779
2780 #ifdef HAVE_SYSV_COMPAT
2781 if (s->is_sysv)
2782 return true;
2783 #endif
2784
2785 return false;
2786 }
2787
2788 _pure_ static bool service_check_snapshot(Unit *u) {
2789 Service *s = SERVICE(u);
2790
2791 assert(s);
2792
2793 return (s->socket_fd < 0);
2794 }
2795
2796 static int service_retry_pid_file(Service *s) {
2797 int r;
2798
2799 assert(s->pid_file);
2800 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2801
2802 r = service_load_pid_file(s, false);
2803 if (r < 0)
2804 return r;
2805
2806 service_unwatch_pid_file(s);
2807
2808 service_enter_running(s, SERVICE_SUCCESS);
2809 return 0;
2810 }
2811
2812 static int service_watch_pid_file(Service *s) {
2813 int r;
2814
2815 log_debug_unit(UNIT(s)->id,
2816 "Setting watch for %s's PID file %s",
2817 UNIT(s)->id, s->pid_file_pathspec->path);
2818 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2819 if (r < 0)
2820 goto fail;
2821
2822 /* the pidfile might have appeared just before we set the watch */
2823 log_debug_unit(UNIT(s)->id,
2824 "Trying to read %s's PID file %s in case it changed",
2825 UNIT(s)->id, s->pid_file_pathspec->path);
2826 service_retry_pid_file(s);
2827
2828 return 0;
2829 fail:
2830 log_error_unit(UNIT(s)->id,
2831 "Failed to set a watch for %s's PID file %s: %s",
2832 UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2833 service_unwatch_pid_file(s);
2834 return r;
2835 }
2836
2837 static int service_demand_pid_file(Service *s) {
2838 PathSpec *ps;
2839
2840 assert(s->pid_file);
2841 assert(!s->pid_file_pathspec);
2842
2843 ps = new0(PathSpec, 1);
2844 if (!ps)
2845 return -ENOMEM;
2846
2847 ps->unit = UNIT(s);
2848 ps->path = strdup(s->pid_file);
2849 if (!ps->path) {
2850 free(ps);
2851 return -ENOMEM;
2852 }
2853
2854 path_kill_slashes(ps->path);
2855
2856 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2857 * keep their PID file open all the time. */
2858 ps->type = PATH_MODIFIED;
2859 ps->inotify_fd = -1;
2860
2861 s->pid_file_pathspec = ps;
2862
2863 return service_watch_pid_file(s);
2864 }
2865
2866 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2867 PathSpec *p = userdata;
2868 Service *s;
2869
2870 assert(p);
2871
2872 s = SERVICE(p->unit);
2873
2874 assert(s);
2875 assert(fd >= 0);
2876 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2877 assert(s->pid_file_pathspec);
2878 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2879
2880 log_debug_unit(UNIT(s)->id, "inotify event for %s", UNIT(s)->id);
2881
2882 if (path_spec_fd_event(p, events) < 0)
2883 goto fail;
2884
2885 if (service_retry_pid_file(s) == 0)
2886 return 0;
2887
2888 if (service_watch_pid_file(s) < 0)
2889 goto fail;
2890
2891 return 0;
2892
2893 fail:
2894 service_unwatch_pid_file(s);
2895 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2896 return 0;
2897 }
2898
2899 static void service_notify_cgroup_empty_event(Unit *u) {
2900 Service *s = SERVICE(u);
2901
2902 assert(u);
2903
2904 log_debug_unit(u->id, "%s: cgroup is empty", u->id);
2905
2906 switch (s->state) {
2907
2908 /* Waiting for SIGCHLD is usually more interesting,
2909 * because it includes return codes/signals. Which is
2910 * why we ignore the cgroup events for most cases,
2911 * except when we don't know pid which to expect the
2912 * SIGCHLD for. */
2913
2914 case SERVICE_START:
2915 case SERVICE_START_POST:
2916 /* If we were hoping for the daemon to write its PID file,
2917 * we can give up now. */
2918 if (s->pid_file_pathspec) {
2919 log_warning_unit(u->id,
2920 "%s never wrote its PID file. Failing.", UNIT(s)->id);
2921 service_unwatch_pid_file(s);
2922 if (s->state == SERVICE_START)
2923 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2924 else
2925 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2926 }
2927 break;
2928
2929 case SERVICE_RUNNING:
2930 /* service_enter_running() will figure out what to do */
2931 service_enter_running(s, SERVICE_SUCCESS);
2932 break;
2933
2934 case SERVICE_STOP_SIGTERM:
2935 case SERVICE_STOP_SIGKILL:
2936
2937 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2938 service_enter_stop_post(s, SERVICE_SUCCESS);
2939
2940 break;
2941
2942 case SERVICE_STOP_POST:
2943 case SERVICE_FINAL_SIGTERM:
2944 case SERVICE_FINAL_SIGKILL:
2945 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2946 service_enter_dead(s, SERVICE_SUCCESS, true);
2947
2948 break;
2949
2950 default:
2951 ;
2952 }
2953 }
2954
2955 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2956 Service *s = SERVICE(u);
2957 ServiceResult f;
2958
2959 assert(s);
2960 assert(pid >= 0);
2961
2962 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2963 is_clean_exit_lsb(code, status, &s->success_status))
2964 f = SERVICE_SUCCESS;
2965 else if (code == CLD_EXITED)
2966 f = SERVICE_FAILURE_EXIT_CODE;
2967 else if (code == CLD_KILLED)
2968 f = SERVICE_FAILURE_SIGNAL;
2969 else if (code == CLD_DUMPED)
2970 f = SERVICE_FAILURE_CORE_DUMP;
2971 else
2972 assert_not_reached("Unknown code");
2973
2974 if (s->main_pid == pid) {
2975 /* Forking services may occasionally move to a new PID.
2976 * As long as they update the PID file before exiting the old
2977 * PID, they're fine. */
2978 if (service_load_pid_file(s, false) == 0)
2979 return;
2980
2981 s->main_pid = 0;
2982 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2983
2984 if (s->main_command) {
2985 /* If this is not a forking service than the
2986 * main process got started and hence we copy
2987 * the exit status so that it is recorded both
2988 * as main and as control process exit
2989 * status */
2990
2991 s->main_command->exec_status = s->main_exec_status;
2992
2993 if (s->main_command->ignore)
2994 f = SERVICE_SUCCESS;
2995 } else if (s->exec_command[SERVICE_EXEC_START]) {
2996
2997 /* If this is a forked process, then we should
2998 * ignore the return value if this was
2999 * configured for the starter process */
3000
3001 if (s->exec_command[SERVICE_EXEC_START]->ignore)
3002 f = SERVICE_SUCCESS;
3003 }
3004
3005 log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
3006 u->id,
3007 "MESSAGE=%s: main process exited, code=%s, status=%i/%s",
3008 u->id, sigchld_code_to_string(code), status,
3009 strna(code == CLD_EXITED
3010 ? exit_status_to_string(status, EXIT_STATUS_FULL)
3011 : signal_to_string(status)),
3012 "EXIT_CODE=%s", sigchld_code_to_string(code),
3013 "EXIT_STATUS=%i", status,
3014 NULL);
3015
3016 if (f != SERVICE_SUCCESS)
3017 s->result = f;
3018
3019 if (s->main_command &&
3020 s->main_command->command_next &&
3021 f == SERVICE_SUCCESS) {
3022
3023 /* There is another command to *
3024 * execute, so let's do that. */
3025
3026 log_debug_unit(u->id,
3027 "%s running next main command for state %s",
3028 u->id, service_state_to_string(s->state));
3029 service_run_next_main(s);
3030
3031 } else {
3032
3033 /* The service exited, so the service is officially
3034 * gone. */
3035 s->main_command = NULL;
3036
3037 switch (s->state) {
3038
3039 case SERVICE_START_POST:
3040 case SERVICE_RELOAD:
3041 case SERVICE_STOP:
3042 /* Need to wait until the operation is
3043 * done */
3044 break;
3045
3046 case SERVICE_START:
3047 if (s->type == SERVICE_ONESHOT) {
3048 /* This was our main goal, so let's go on */
3049 if (f == SERVICE_SUCCESS)
3050 service_enter_start_post(s);
3051 else
3052 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3053 break;
3054 }
3055
3056 /* Fall through */
3057
3058 case SERVICE_RUNNING:
3059 service_enter_running(s, f);
3060 break;
3061
3062 case SERVICE_STOP_SIGTERM:
3063 case SERVICE_STOP_SIGKILL:
3064
3065 if (!control_pid_good(s))
3066 service_enter_stop_post(s, f);
3067
3068 /* If there is still a control process, wait for that first */
3069 break;
3070
3071 case SERVICE_STOP_POST:
3072 case SERVICE_FINAL_SIGTERM:
3073 case SERVICE_FINAL_SIGKILL:
3074
3075 if (!control_pid_good(s))
3076 service_enter_dead(s, f, true);
3077 break;
3078
3079 default:
3080 assert_not_reached("Uh, main process died at wrong time.");
3081 }
3082 }
3083
3084 } else if (s->control_pid == pid) {
3085 s->control_pid = 0;
3086
3087 if (s->control_command) {
3088 exec_status_exit(&s->control_command->exec_status,
3089 &s->exec_context, pid, code, status);
3090
3091 if (s->control_command->ignore)
3092 f = SERVICE_SUCCESS;
3093 }
3094
3095 log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
3096 "%s: control process exited, code=%s status=%i",
3097 u->id, sigchld_code_to_string(code), status);
3098
3099 if (f != SERVICE_SUCCESS)
3100 s->result = f;
3101
3102 /* Immediately get rid of the cgroup, so that the
3103 * kernel doesn't delay the cgroup empty messages for
3104 * the service cgroup any longer than necessary */
3105 service_kill_control_processes(s);
3106
3107 if (s->control_command &&
3108 s->control_command->command_next &&
3109 f == SERVICE_SUCCESS) {
3110
3111 /* There is another command to *
3112 * execute, so let's do that. */
3113
3114 log_debug_unit(u->id,
3115 "%s running next control command for state %s",
3116 u->id, service_state_to_string(s->state));
3117 service_run_next_control(s);
3118
3119 } else {
3120 /* No further commands for this step, so let's
3121 * figure out what to do next */
3122
3123 s->control_command = NULL;
3124 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3125
3126 log_debug_unit(u->id,
3127 "%s got final SIGCHLD for state %s",
3128 u->id, service_state_to_string(s->state));
3129
3130 switch (s->state) {
3131
3132 case SERVICE_START_PRE:
3133 if (f == SERVICE_SUCCESS)
3134 service_enter_start(s);
3135 else
3136 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3137 break;
3138
3139 case SERVICE_START:
3140 if (s->type != SERVICE_FORKING)
3141 /* Maybe spurious event due to a reload that changed the type? */
3142 break;
3143
3144 if (f != SERVICE_SUCCESS) {
3145 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3146 break;
3147 }
3148
3149 if (s->pid_file) {
3150 bool has_start_post;
3151 int r;
3152
3153 /* Let's try to load the pid file here if we can.
3154 * The PID file might actually be created by a START_POST
3155 * script. In that case don't worry if the loading fails. */
3156
3157 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3158 r = service_load_pid_file(s, !has_start_post);
3159 if (!has_start_post && r < 0) {
3160 r = service_demand_pid_file(s);
3161 if (r < 0 || !cgroup_good(s))
3162 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3163 break;
3164 }
3165 } else
3166 service_search_main_pid(s);
3167
3168 service_enter_start_post(s);
3169 break;
3170
3171 case SERVICE_START_POST:
3172 if (f != SERVICE_SUCCESS) {
3173 service_enter_stop(s, f);
3174 break;
3175 }
3176
3177 if (s->pid_file) {
3178 int r;
3179
3180 r = service_load_pid_file(s, true);
3181 if (r < 0) {
3182 r = service_demand_pid_file(s);
3183 if (r < 0 || !cgroup_good(s))
3184 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3185 break;
3186 }
3187 } else
3188 service_search_main_pid(s);
3189
3190 service_enter_running(s, SERVICE_SUCCESS);
3191 break;
3192
3193 case SERVICE_RELOAD:
3194 if (f == SERVICE_SUCCESS) {
3195 service_load_pid_file(s, true);
3196 service_search_main_pid(s);
3197 }
3198
3199 s->reload_result = f;
3200 service_enter_running(s, SERVICE_SUCCESS);
3201 break;
3202
3203 case SERVICE_STOP:
3204 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3205 break;
3206
3207 case SERVICE_STOP_SIGTERM:
3208 case SERVICE_STOP_SIGKILL:
3209 if (main_pid_good(s) <= 0)
3210 service_enter_stop_post(s, f);
3211
3212 /* If there is still a service
3213 * process around, wait until
3214 * that one quit, too */
3215 break;
3216
3217 case SERVICE_STOP_POST:
3218 case SERVICE_FINAL_SIGTERM:
3219 case SERVICE_FINAL_SIGKILL:
3220 if (main_pid_good(s) <= 0)
3221 service_enter_dead(s, f, true);
3222 break;
3223
3224 default:
3225 assert_not_reached("Uh, control process died at wrong time.");
3226 }
3227 }
3228 }
3229
3230 /* Notify clients about changed exit status */
3231 unit_add_to_dbus_queue(u);
3232
3233 /* We got one SIGCHLD for the service, let's watch all
3234 * processes that are now running of the service, and watch
3235 * that. Among the PIDs we then watch will be children
3236 * reassigned to us, which hopefully allows us to identify
3237 * when all children are gone */
3238 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
3239 unit_watch_all_pids(u);
3240
3241 /* If the PID set is empty now, then let's finish this off */
3242 if (set_isempty(u->pids))
3243 service_notify_cgroup_empty_event(u);
3244 }
3245
3246 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3247 Service *s = SERVICE(userdata);
3248
3249 assert(s);
3250 assert(source == s->timer_event_source);
3251
3252 switch (s->state) {
3253
3254 case SERVICE_START_PRE:
3255 case SERVICE_START:
3256 log_warning_unit(UNIT(s)->id,
3257 "%s %s operation timed out. Terminating.",
3258 UNIT(s)->id,
3259 s->state == SERVICE_START ? "start" : "start-pre");
3260 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3261 break;
3262
3263 case SERVICE_START_POST:
3264 log_warning_unit(UNIT(s)->id,
3265 "%s start-post operation timed out. Stopping.", UNIT(s)->id);
3266 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3267 break;
3268
3269 case SERVICE_RELOAD:
3270 log_warning_unit(UNIT(s)->id,
3271 "%s reload operation timed out. Stopping.", UNIT(s)->id);
3272 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3273 service_enter_running(s, SERVICE_SUCCESS);
3274 break;
3275
3276 case SERVICE_STOP:
3277 log_warning_unit(UNIT(s)->id,
3278 "%s stopping timed out. Terminating.", UNIT(s)->id);
3279 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3280 break;
3281
3282 case SERVICE_STOP_SIGTERM:
3283 if (s->kill_context.send_sigkill) {
3284 log_warning_unit(UNIT(s)->id,
3285 "%s stop-sigterm timed out. Killing.", UNIT(s)->id);
3286 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3287 } else {
3288 log_warning_unit(UNIT(s)->id,
3289 "%s stop-sigterm timed out. Skipping SIGKILL.", UNIT(s)->id);
3290 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3291 }
3292
3293 break;
3294
3295 case SERVICE_STOP_SIGKILL:
3296 /* Uh, we sent a SIGKILL and it is still not gone?
3297 * Must be something we cannot kill, so let's just be
3298 * weirded out and continue */
3299
3300 log_warning_unit(UNIT(s)->id,
3301 "%s still around after SIGKILL. Ignoring.", UNIT(s)->id);
3302 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3303 break;
3304
3305 case SERVICE_STOP_POST:
3306 log_warning_unit(UNIT(s)->id,
3307 "%s stop-post timed out. Terminating.", UNIT(s)->id);
3308 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3309 break;
3310
3311 case SERVICE_FINAL_SIGTERM:
3312 if (s->kill_context.send_sigkill) {
3313 log_warning_unit(UNIT(s)->id,
3314 "%s stop-final-sigterm timed out. Killing.", UNIT(s)->id);
3315 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3316 } else {
3317 log_warning_unit(UNIT(s)->id,
3318 "%s stop-final-sigterm timed out. Skipping SIGKILL. Entering failed mode.",
3319 UNIT(s)->id);
3320 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3321 }
3322
3323 break;
3324
3325 case SERVICE_FINAL_SIGKILL:
3326 log_warning_unit(UNIT(s)->id,
3327 "%s still around after final SIGKILL. Entering failed mode.", UNIT(s)->id);
3328 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3329 break;
3330
3331 case SERVICE_AUTO_RESTART:
3332 log_info_unit(UNIT(s)->id,
3333 s->restart_usec > 0 ?
3334 "%s holdoff time over, scheduling restart." :
3335 "%s has no holdoff time, scheduling restart.",
3336 UNIT(s)->id);
3337 service_enter_restart(s);
3338 break;
3339
3340 default:
3341 assert_not_reached("Timeout at wrong time.");
3342 }
3343
3344 return 0;
3345 }
3346
3347 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3348 Service *s = SERVICE(userdata);
3349
3350 assert(s);
3351 assert(source == s->watchdog_event_source);
3352
3353 log_error_unit(UNIT(s)->id, "%s watchdog timeout!", UNIT(s)->id);
3354 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_WATCHDOG);
3355
3356 return 0;
3357 }
3358
3359 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3360 Service *s = SERVICE(u);
3361 const char *e;
3362 bool notify_dbus = false;
3363
3364 assert(u);
3365
3366 log_debug_unit(u->id, "%s: Got notification message from PID "PID_FMT" (%s...)",
3367 u->id, pid, tags && *tags ? tags[0] : "(empty)");
3368
3369 if (s->notify_access == NOTIFY_NONE) {
3370 log_warning_unit(u->id,
3371 "%s: Got notification message from PID "PID_FMT", but reception is disabled.",
3372 u->id, pid);
3373 return;
3374 }
3375
3376 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3377
3378 if (s->main_pid != 0)
3379 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);
3380 else
3381 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);
3382 return;
3383 }
3384
3385 /* Interpret MAINPID= */
3386 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3387 (s->state == SERVICE_START ||
3388 s->state == SERVICE_START_POST ||
3389 s->state == SERVICE_RUNNING ||
3390 s->state == SERVICE_RELOAD)) {
3391
3392 if (parse_pid(e + 8, &pid) < 0)
3393 log_warning_unit(u->id, "Failed to parse notification message %s", e);
3394 else {
3395 log_debug_unit(u->id, "%s: got %s", u->id, e);
3396 service_set_main_pid(s, pid);
3397 unit_watch_pid(UNIT(s), pid);
3398 notify_dbus = true;
3399 }
3400 }
3401
3402 /* Interpret READY= */
3403 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START && strv_find(tags, "READY=1")) {
3404 log_debug_unit(u->id, "%s: got READY=1", u->id);
3405 service_enter_start_post(s);
3406 notify_dbus = true;
3407 }
3408
3409 /* Interpret STATUS= */
3410 e = strv_find_prefix(tags, "STATUS=");
3411 if (e) {
3412 char *t;
3413
3414 if (e[7]) {
3415 if (!utf8_is_valid(e+7)) {
3416 log_warning_unit(u->id, "Status message in notification is not UTF-8 clean.");
3417 return;
3418 }
3419
3420 log_debug_unit(u->id, "%s: got %s", u->id, e);
3421
3422 t = strdup(e+7);
3423 if (!t) {
3424 log_oom();
3425 return;
3426 }
3427
3428 } else
3429 t = NULL;
3430
3431 if (!streq_ptr(s->status_text, t)) {
3432 free(s->status_text);
3433 s->status_text = t;
3434 notify_dbus = true;
3435 } else
3436 free(t);
3437 }
3438
3439 /* Interpret WATCHDOG= */
3440 if (strv_find(tags, "WATCHDOG=1")) {
3441 log_debug_unit(u->id, "%s: got WATCHDOG=1", u->id);
3442 service_reset_watchdog(s);
3443 }
3444
3445 /* Notify clients about changed status or main pid */
3446 if (notify_dbus)
3447 unit_add_to_dbus_queue(u);
3448 }
3449
3450 static int service_get_timeout(Unit *u, uint64_t *timeout) {
3451 Service *s = SERVICE(u);
3452 int r;
3453
3454 if (!s->timer_event_source)
3455 return 0;
3456
3457 r = sd_event_source_get_time(s->timer_event_source, timeout);
3458 if (r < 0)
3459 return r;
3460
3461 return 1;
3462 }
3463
3464 #ifdef HAVE_SYSV_COMPAT
3465
3466 static int service_enumerate(Manager *m) {
3467 char **p;
3468 unsigned i;
3469 _cleanup_closedir_ DIR *d = NULL;
3470 _cleanup_free_ char *path = NULL, *fpath = NULL, *name = NULL;
3471 Set *runlevel_services[ELEMENTSOF(rcnd_table)] = {};
3472 _cleanup_set_free_ Set *shutdown_services = NULL;
3473 Unit *service;
3474 Iterator j;
3475 int r;
3476
3477 assert(m);
3478
3479 if (m->running_as != SYSTEMD_SYSTEM)
3480 return 0;
3481
3482 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3483 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3484 struct dirent *de;
3485
3486 free(path);
3487 path = strjoin(*p, "/", rcnd_table[i].path, NULL);
3488 if (!path) {
3489 r = -ENOMEM;
3490 goto finish;
3491 }
3492
3493 if (d)
3494 closedir(d);
3495
3496 d = opendir(path);
3497 if (!d) {
3498 if (errno != ENOENT)
3499 log_warning("opendir(%s) failed: %m", path);
3500
3501 continue;
3502 }
3503
3504 while ((de = readdir(d))) {
3505 int a, b;
3506
3507 if (ignore_file(de->d_name))
3508 continue;
3509
3510 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3511 continue;
3512
3513 if (strlen(de->d_name) < 4)
3514 continue;
3515
3516 a = undecchar(de->d_name[1]);
3517 b = undecchar(de->d_name[2]);
3518
3519 if (a < 0 || b < 0)
3520 continue;
3521
3522 free(fpath);
3523 fpath = strjoin(path, "/", de->d_name, NULL);
3524 if (!fpath) {
3525 r = -ENOMEM;
3526 goto finish;
3527 }
3528
3529 if (access(fpath, X_OK) < 0) {
3530
3531 if (errno != ENOENT)
3532 log_warning("access() failed on %s: %m", fpath);
3533
3534 continue;
3535 }
3536
3537 free(name);
3538 name = sysv_translate_name(de->d_name + 3);
3539 if (!name) {
3540 r = log_oom();
3541 goto finish;
3542 }
3543
3544 r = manager_load_unit_prepare(m, name, NULL, NULL, &service);
3545 if (r < 0) {
3546 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3547 continue;
3548 }
3549
3550 if (de->d_name[0] == 'S') {
3551
3552 if (rcnd_table[i].type == RUNLEVEL_UP) {
3553 SERVICE(service)->sysv_start_priority_from_rcnd =
3554 MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3555
3556 SERVICE(service)->sysv_enabled = true;
3557 }
3558
3559 r = set_ensure_allocated(&runlevel_services[i],
3560 trivial_hash_func, trivial_compare_func);
3561 if (r < 0)
3562 goto finish;
3563
3564 r = set_put(runlevel_services[i], service);
3565 if (r < 0)
3566 goto finish;
3567
3568 } else if (de->d_name[0] == 'K' &&
3569 (rcnd_table[i].type == RUNLEVEL_DOWN)) {
3570
3571 r = set_ensure_allocated(&shutdown_services,
3572 trivial_hash_func, trivial_compare_func);
3573 if (r < 0)
3574 goto finish;
3575
3576 r = set_put(shutdown_services, service);
3577 if (r < 0)
3578 goto finish;
3579 }
3580 }
3581 }
3582
3583 /* Now we loaded all stubs and are aware of the lowest
3584 start-up priority for all services, not let's actually load
3585 the services, this will also tell us which services are
3586 actually native now */
3587 manager_dispatch_load_queue(m);
3588
3589 /* If this is a native service, rely on native ways to pull in
3590 * a service, don't pull it in via sysv rcN.d links. */
3591 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3592 SET_FOREACH(service, runlevel_services[i], j) {
3593 service = unit_follow_merge(service);
3594
3595 if (service->fragment_path)
3596 continue;
3597
3598 r = unit_add_two_dependencies_by_name_inverse(
3599 service, UNIT_AFTER, UNIT_WANTS,
3600 rcnd_table[i].target, NULL, true);
3601 if (r < 0)
3602 goto finish;
3603 }
3604
3605 /* We honour K links only for halt/reboot. For the normal
3606 * runlevels we assume the stop jobs will be implicitly added
3607 * by the core logic. Also, we don't really distinguish here
3608 * between the runlevels 0 and 6 and just add them to the
3609 * special shutdown target. */
3610 SET_FOREACH(service, shutdown_services, j) {
3611 service = unit_follow_merge(service);
3612
3613 if (service->fragment_path)
3614 continue;
3615
3616 r = unit_add_two_dependencies_by_name(
3617 service, UNIT_BEFORE, UNIT_CONFLICTS,
3618 SPECIAL_SHUTDOWN_TARGET, NULL, true);
3619 if (r < 0)
3620 goto finish;
3621 }
3622
3623 r = 0;
3624
3625 finish:
3626
3627 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3628 set_free(runlevel_services[i]);
3629
3630 return r;
3631 }
3632 #endif
3633
3634 static void service_bus_name_owner_change(
3635 Unit *u,
3636 const char *name,
3637 const char *old_owner,
3638 const char *new_owner) {
3639
3640 Service *s = SERVICE(u);
3641 int r;
3642
3643 assert(s);
3644 assert(name);
3645
3646 assert(streq(s->bus_name, name));
3647 assert(old_owner || new_owner);
3648
3649 if (old_owner && new_owner)
3650 log_debug_unit(u->id,
3651 "%s's D-Bus name %s changed owner from %s to %s",
3652 u->id, name, old_owner, new_owner);
3653 else if (old_owner)
3654 log_debug_unit(u->id,
3655 "%s's D-Bus name %s no longer registered by %s",
3656 u->id, name, old_owner);
3657 else
3658 log_debug_unit(u->id,
3659 "%s's D-Bus name %s now registered by %s",
3660 u->id, name, new_owner);
3661
3662 s->bus_name_good = !!new_owner;
3663
3664 if (s->type == SERVICE_DBUS) {
3665
3666 /* service_enter_running() will figure out what to
3667 * do */
3668 if (s->state == SERVICE_RUNNING)
3669 service_enter_running(s, SERVICE_SUCCESS);
3670 else if (s->state == SERVICE_START && new_owner)
3671 service_enter_start_post(s);
3672
3673 } else if (new_owner &&
3674 s->main_pid <= 0 &&
3675 (s->state == SERVICE_START ||
3676 s->state == SERVICE_START_POST ||
3677 s->state == SERVICE_RUNNING ||
3678 s->state == SERVICE_RELOAD)) {
3679
3680 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
3681 pid_t pid;
3682
3683 /* Try to acquire PID from bus service */
3684
3685 r = sd_bus_get_owner(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3686 if (r >= 0)
3687 r = sd_bus_creds_get_pid(creds, &pid);
3688 if (r >= 0) {
3689 log_debug_unit(u->id, "%s's D-Bus name %s is now owned by process %u", u->id, name, (unsigned) pid);
3690
3691 service_set_main_pid(s, pid);
3692 unit_watch_pid(UNIT(s), pid);
3693 }
3694 }
3695 }
3696
3697 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3698 _cleanup_free_ char *peer = NULL;
3699 int r;
3700
3701 assert(s);
3702 assert(fd >= 0);
3703
3704 /* This is called by the socket code when instantiating a new
3705 * service for a stream socket and the socket needs to be
3706 * configured. */
3707
3708 if (UNIT(s)->load_state != UNIT_LOADED)
3709 return -EINVAL;
3710
3711 if (s->socket_fd >= 0)
3712 return -EBUSY;
3713
3714 if (s->state != SERVICE_DEAD)
3715 return -EAGAIN;
3716
3717 if (getpeername_pretty(fd, &peer) >= 0) {
3718
3719 if (UNIT(s)->description) {
3720 _cleanup_free_ char *a;
3721
3722 a = strjoin(UNIT(s)->description, " (", peer, ")", NULL);
3723 if (!a)
3724 return -ENOMEM;
3725
3726 r = unit_set_description(UNIT(s), a);
3727 } else
3728 r = unit_set_description(UNIT(s), peer);
3729
3730 if (r < 0)
3731 return r;
3732 }
3733
3734 s->socket_fd = fd;
3735
3736 unit_ref_set(&s->accept_socket, UNIT(sock));
3737
3738 return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3739 }
3740
3741 static void service_reset_failed(Unit *u) {
3742 Service *s = SERVICE(u);
3743
3744 assert(s);
3745
3746 if (s->state == SERVICE_FAILED)
3747 service_set_state(s, SERVICE_DEAD);
3748
3749 s->result = SERVICE_SUCCESS;
3750 s->reload_result = SERVICE_SUCCESS;
3751
3752 RATELIMIT_RESET(s->start_limit);
3753 }
3754
3755 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3756 Service *s = SERVICE(u);
3757
3758 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3759 }
3760
3761 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3762 [SERVICE_DEAD] = "dead",
3763 [SERVICE_START_PRE] = "start-pre",
3764 [SERVICE_START] = "start",
3765 [SERVICE_START_POST] = "start-post",
3766 [SERVICE_RUNNING] = "running",
3767 [SERVICE_EXITED] = "exited",
3768 [SERVICE_RELOAD] = "reload",
3769 [SERVICE_STOP] = "stop",
3770 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3771 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3772 [SERVICE_STOP_POST] = "stop-post",
3773 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3774 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3775 [SERVICE_FAILED] = "failed",
3776 [SERVICE_AUTO_RESTART] = "auto-restart",
3777 };
3778
3779 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3780
3781 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3782 [SERVICE_RESTART_NO] = "no",
3783 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3784 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3785 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3786 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3787 [SERVICE_RESTART_ALWAYS] = "always"
3788 };
3789
3790 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3791
3792 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3793 [SERVICE_SIMPLE] = "simple",
3794 [SERVICE_FORKING] = "forking",
3795 [SERVICE_ONESHOT] = "oneshot",
3796 [SERVICE_DBUS] = "dbus",
3797 [SERVICE_NOTIFY] = "notify",
3798 [SERVICE_IDLE] = "idle"
3799 };
3800
3801 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3802
3803 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3804 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3805 [SERVICE_EXEC_START] = "ExecStart",
3806 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3807 [SERVICE_EXEC_RELOAD] = "ExecReload",
3808 [SERVICE_EXEC_STOP] = "ExecStop",
3809 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3810 };
3811
3812 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3813
3814 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3815 [NOTIFY_NONE] = "none",
3816 [NOTIFY_MAIN] = "main",
3817 [NOTIFY_ALL] = "all"
3818 };
3819
3820 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3821
3822 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3823 [SERVICE_SUCCESS] = "success",
3824 [SERVICE_FAILURE_RESOURCES] = "resources",
3825 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3826 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3827 [SERVICE_FAILURE_SIGNAL] = "signal",
3828 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3829 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3830 [SERVICE_FAILURE_START_LIMIT] = "start-limit"
3831 };
3832
3833 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3834
3835 static const char* const failure_action_table[_SERVICE_FAILURE_ACTION_MAX] = {
3836 [SERVICE_FAILURE_ACTION_NONE] = "none",
3837 [SERVICE_FAILURE_ACTION_REBOOT] = "reboot",
3838 [SERVICE_FAILURE_ACTION_REBOOT_FORCE] = "reboot-force",
3839 [SERVICE_FAILURE_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate"
3840 };
3841 DEFINE_STRING_TABLE_LOOKUP(failure_action, FailureAction);
3842
3843 const UnitVTable service_vtable = {
3844 .object_size = sizeof(Service),
3845 .exec_context_offset = offsetof(Service, exec_context),
3846 .cgroup_context_offset = offsetof(Service, cgroup_context),
3847 .kill_context_offset = offsetof(Service, kill_context),
3848 .exec_runtime_offset = offsetof(Service, exec_runtime),
3849
3850 .sections =
3851 "Unit\0"
3852 "Service\0"
3853 "Install\0",
3854 .private_section = "Service",
3855
3856 .init = service_init,
3857 .done = service_done,
3858 .load = service_load,
3859
3860 .coldplug = service_coldplug,
3861
3862 .dump = service_dump,
3863
3864 .start = service_start,
3865 .stop = service_stop,
3866 .reload = service_reload,
3867
3868 .can_reload = service_can_reload,
3869
3870 .kill = service_kill,
3871
3872 .serialize = service_serialize,
3873 .deserialize_item = service_deserialize_item,
3874
3875 .active_state = service_active_state,
3876 .sub_state_to_string = service_sub_state_to_string,
3877
3878 .check_gc = service_check_gc,
3879 .check_snapshot = service_check_snapshot,
3880
3881 .sigchld_event = service_sigchld_event,
3882
3883 .reset_failed = service_reset_failed,
3884
3885 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3886 .notify_message = service_notify_message,
3887
3888 .bus_name_owner_change = service_bus_name_owner_change,
3889
3890 .bus_interface = "org.freedesktop.systemd1.Service",
3891 .bus_vtable = bus_service_vtable,
3892 .bus_set_property = bus_service_set_property,
3893 .bus_commit_properties = bus_service_commit_properties,
3894
3895 .get_timeout = service_get_timeout,
3896
3897 #ifdef HAVE_SYSV_COMPAT
3898 .enumerate = service_enumerate,
3899 #endif
3900
3901 .can_transient = true,
3902
3903 .status_message_formats = {
3904 .starting_stopping = {
3905 [0] = "Starting %s...",
3906 [1] = "Stopping %s...",
3907 },
3908 .finished_start_job = {
3909 [JOB_DONE] = "Started %s.",
3910 [JOB_FAILED] = "Failed to start %s.",
3911 [JOB_DEPENDENCY] = "Dependency failed for %s.",
3912 [JOB_TIMEOUT] = "Timed out starting %s.",
3913 },
3914 .finished_stop_job = {
3915 [JOB_DONE] = "Stopped %s.",
3916 [JOB_FAILED] = "Stopped (with error) %s.",
3917 [JOB_TIMEOUT] = "Timed out stopping %s.",
3918 },
3919 },
3920 };
Unnamed repository; edit this file 'description' to name the repository.