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unit: allow state change from running to restarting
[people/ms/systemd.git] / service.c
1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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 General Public License as published by
10 the Free Software Foundation; either version 2 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 General Public License for more details.
17
18 You should have received a copy of the GNU 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
27 #include "unit.h"
28 #include "service.h"
29 #include "load-fragment.h"
30 #include "load-dropin.h"
31 #include "log.h"
32 #include "strv.h"
33
34 #define COMMENTS "#;\n"
35 #define NEWLINES "\n\r"
36 #define LINE_MAX 4096
37
38 static const char * const rcnd_table[] = {
39 "/rc0.d", SPECIAL_RUNLEVEL0_TARGET,
40 "/rc1.d", SPECIAL_RUNLEVEL1_TARGET,
41 "/rc2.d", SPECIAL_RUNLEVEL2_TARGET,
42 "/rc3.d", SPECIAL_RUNLEVEL3_TARGET,
43 "/rc4.d", SPECIAL_RUNLEVEL4_TARGET,
44 "/rc5.d", SPECIAL_RUNLEVEL5_TARGET,
45 "/rc6.d", SPECIAL_RUNLEVEL6_TARGET,
46 "/boot.d", SPECIAL_BASIC_TARGET
47 };
48
49 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
50 [SERVICE_DEAD] = UNIT_INACTIVE,
51 [SERVICE_START_PRE] = UNIT_ACTIVATING,
52 [SERVICE_START] = UNIT_ACTIVATING,
53 [SERVICE_START_POST] = UNIT_ACTIVATING,
54 [SERVICE_RUNNING] = UNIT_ACTIVE,
55 [SERVICE_EXITED] = UNIT_ACTIVE,
56 [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
57 [SERVICE_STOP] = UNIT_DEACTIVATING,
58 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
59 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
60 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
61 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
62 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
63 [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
64 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
65 };
66
67 static void service_unwatch_control_pid(Service *s) {
68 assert(s);
69
70 if (s->control_pid <= 0)
71 return;
72
73 unit_unwatch_pid(UNIT(s), s->control_pid);
74 s->control_pid = 0;
75 }
76
77 static void service_unwatch_main_pid(Service *s) {
78 assert(s);
79
80 if (s->main_pid <= 0)
81 return;
82
83 unit_unwatch_pid(UNIT(s), s->main_pid);
84 s->main_pid = 0;
85 }
86
87 static void service_done(Unit *u) {
88 Service *s = SERVICE(u);
89
90 assert(s);
91
92 free(s->pid_file);
93 s->pid_file = NULL;
94
95 free(s->sysv_path);
96 s->sysv_path = NULL;
97
98 free(s->sysv_runlevels);
99 s->sysv_runlevels = NULL;
100
101 exec_context_done(&s->exec_context);
102 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
103 s->control_command = NULL;
104
105 /* This will leak a process, but at least no memory or any of
106 * our resources */
107 service_unwatch_main_pid(s);
108 service_unwatch_control_pid(s);
109
110 unit_unwatch_timer(u, &s->timer_watch);
111 }
112
113 static int sysv_translate_name(const char *name, char **_r) {
114
115 static const char * const table[] = {
116 "$local_fs", SPECIAL_LOCAL_FS_TARGET,
117 "$network", SPECIAL_NETWORK_TARGET,
118 "$named", SPECIAL_NSS_LOOKUP_TARGET,
119 "$portmap", SPECIAL_RPCBIND_TARGET,
120 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
121 "$syslog", SPECIAL_SYSLOG_TARGET,
122 "$time", SPECIAL_RTC_SET_TARGET
123 };
124
125 unsigned i;
126 char *r;
127
128 for (i = 0; i < ELEMENTSOF(table); i += 2)
129 if (streq(table[i], name)) {
130 if (!(r = strdup(table[i+1])))
131 return -ENOMEM;
132
133 goto finish;
134 }
135
136 if (*name == '$')
137 return 0;
138
139 if (asprintf(&r, "%s.service", name) < 0)
140 return -ENOMEM;
141
142 finish:
143
144 if (_r)
145 *_r = r;
146
147 return 1;
148 }
149
150 static int sysv_chkconfig_order(Service *s) {
151 Meta *other;
152 int r;
153
154 assert(s);
155
156 if (s->sysv_start_priority < 0)
157 return 0;
158
159 /* For each pair of services where at least one lacks a LSB
160 * header, we use the start priority value to order things. */
161
162 LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
163 Service *t;
164 UnitDependency d;
165
166 t = (Service*) other;
167
168 if (s == t)
169 continue;
170
171 if (t->sysv_start_priority < 0)
172 continue;
173
174 /* If both units have modern headers we don't care
175 * about the priorities */
176 if ((!s->sysv_path || s->sysv_has_lsb) &&
177 (!t->sysv_path || t->sysv_has_lsb))
178 continue;
179
180 if (t->sysv_start_priority < s->sysv_start_priority)
181 d = UNIT_AFTER;
182 else if (t->sysv_start_priority > s->sysv_start_priority)
183 d = UNIT_BEFORE;
184 else
185 continue;
186
187 /* FIXME: Maybe we should compare the name here lexicographically? */
188
189 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
190 return r;
191 }
192
193 return 0;
194 }
195
196 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
197 ExecCommand *c;
198
199 if (!(c = new0(ExecCommand, 1)))
200 return NULL;
201
202 if (!(c->path = strdup(path))) {
203 free(c);
204 return NULL;
205 }
206
207 if (!(c->argv = strv_new(path, arg1, NULL))) {
208 free(c->path);
209 free(c);
210 return NULL;
211 }
212
213 return c;
214 }
215
216 static int sysv_exec_commands(Service *s) {
217 ExecCommand *c;
218
219 assert(s);
220 assert(s->sysv_path);
221
222 if (!(c = exec_command_new(s->sysv_path, "start")))
223 return -ENOMEM;
224 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
225
226 if (!(c = exec_command_new(s->sysv_path, "stop")))
227 return -ENOMEM;
228 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
229
230 if (!(c = exec_command_new(s->sysv_path, "reload")))
231 return -ENOMEM;
232 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
233
234 return 0;
235 }
236
237 static int priority_from_rcd(Service *s, const char *init_script) {
238 char **p;
239 unsigned i;
240
241 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
242 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
243 char *path;
244 DIR *d;
245 struct dirent *de;
246
247 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
248 return -ENOMEM;
249
250 d = opendir(path);
251 free(path);
252
253 if (!d) {
254 if (errno != ENOENT)
255 log_warning("opendir() failed on %s: %s", path, strerror(errno));
256
257 continue;
258 }
259
260 while ((de = readdir(d))) {
261 int a, b;
262
263 if (ignore_file(de->d_name))
264 continue;
265
266 if (de->d_name[0] != 'S')
267 continue;
268
269 if (strlen(de->d_name) < 4)
270 continue;
271
272 if (!streq(de->d_name + 3, init_script))
273 continue;
274
275 /* Yay, we found it! Now decode the priority */
276
277 a = undecchar(de->d_name[1]);
278 b = undecchar(de->d_name[2]);
279
280 if (a < 0 || b < 0)
281 continue;
282
283 s->sysv_start_priority = a*10 + b;
284
285 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
286
287 closedir(d);
288 return 0;
289 }
290
291 closedir(d);
292 }
293
294 return 0;
295 }
296
297 static int service_load_sysv_path(Service *s, const char *path) {
298 FILE *f;
299 Unit *u;
300 unsigned line = 0;
301 int r;
302 enum {
303 NORMAL,
304 DESCRIPTION,
305 LSB,
306 LSB_DESCRIPTION
307 } state = NORMAL;
308
309 assert(s);
310 assert(path);
311
312 u = UNIT(s);
313
314 if (!(f = fopen(path, "re"))) {
315 r = errno == ENOENT ? 0 : -errno;
316 goto finish;
317 }
318
319 s->type = SERVICE_FORKING;
320 s->restart = SERVICE_ONCE;
321
322 free(s->sysv_path);
323 if (!(s->sysv_path = strdup(path))) {
324 r = -ENOMEM;
325 goto finish;
326 }
327
328 while (!feof(f)) {
329 char l[LINE_MAX], *t;
330
331 if (!fgets(l, sizeof(l), f)) {
332 if (feof(f))
333 break;
334
335 r = -errno;
336 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
337 goto finish;
338 }
339
340 line++;
341
342 t = strstrip(l);
343 if (*t != '#')
344 continue;
345
346 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
347 state = LSB;
348 s->sysv_has_lsb = true;
349 continue;
350 }
351
352 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
353 state = NORMAL;
354 continue;
355 }
356
357 t++;
358 t += strspn(t, WHITESPACE);
359
360 if (state == NORMAL) {
361
362 /* Try to parse Red Hat style chkconfig headers */
363
364 if (startswith(t, "chkconfig:")) {
365 int start_priority;
366 char runlevels[16], *k;
367
368 state = NORMAL;
369
370 if (sscanf(t+10, "%15s %i %*i",
371 runlevels,
372 &start_priority) != 2) {
373
374 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
375 continue;
376 }
377
378 if (start_priority < 0 || start_priority > 99)
379 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
380 else
381 s->sysv_start_priority = start_priority;
382
383 char_array_0(runlevels);
384 k = delete_chars(runlevels, WHITESPACE "-");
385
386 if (k[0]) {
387 char *d;
388
389 if (!(d = strdup(k))) {
390 r = -ENOMEM;
391 goto finish;
392 }
393
394 free(s->sysv_runlevels);
395 s->sysv_runlevels = d;
396 }
397
398
399 } else if (startswith(t, "description:")) {
400
401 size_t k = strlen(t);
402 char *d;
403
404 if (t[k-1] == '\\') {
405 state = DESCRIPTION;
406 t[k-1] = 0;
407 }
408
409 if (!(d = strdup(strstrip(t+12)))) {
410 r = -ENOMEM;
411 goto finish;
412 }
413
414 free(u->meta.description);
415 u->meta.description = d;
416
417 } else if (startswith(t, "pidfile:")) {
418
419 char *fn;
420
421 state = NORMAL;
422
423 fn = strstrip(t+8);
424 if (!path_is_absolute(fn)) {
425 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
426 continue;
427 }
428
429 if (!(fn = strdup(fn))) {
430 r = -ENOMEM;
431 goto finish;
432 }
433
434 free(s->pid_file);
435 s->pid_file = fn;
436 }
437
438 } else if (state == DESCRIPTION) {
439
440 /* Try to parse Red Hat style description
441 * continuation */
442
443 size_t k = strlen(t);
444 char *d;
445
446 if (t[k-1] == '\\')
447 t[k-1] = 0;
448 else
449 state = NORMAL;
450
451 assert(u->meta.description);
452 if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
453 r = -ENOMEM;
454 goto finish;
455 }
456
457 free(u->meta.description);
458 u->meta.description = d;
459
460 } else if (state == LSB || state == LSB_DESCRIPTION) {
461
462 if (startswith(t, "Provides:")) {
463 char *i, *w;
464 size_t z;
465
466 state = LSB;
467
468 FOREACH_WORD(w, z, t+9, i) {
469 char *n, *m;
470
471 if (!(n = strndup(w, z))) {
472 r = -ENOMEM;
473 goto finish;
474 }
475
476 r = sysv_translate_name(n, &m);
477 free(n);
478
479 if (r < 0)
480 goto finish;
481
482 if (r == 0)
483 continue;
484
485 if (unit_name_to_type(m) == UNIT_SERVICE)
486 r = unit_add_name(u, m);
487 else {
488 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
489 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
490 }
491
492 free(m);
493
494 if (r < 0)
495 goto finish;
496 }
497
498 } else if (startswith(t, "Required-Start:") ||
499 startswith(t, "Should-Start:")) {
500 char *i, *w;
501 size_t z;
502
503 state = LSB;
504
505 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
506 char *n, *m;
507
508 if (!(n = strndup(w, z))) {
509 r = -ENOMEM;
510 goto finish;
511 }
512
513 r = sysv_translate_name(n, &m);
514 free(n);
515
516 if (r < 0)
517 goto finish;
518
519 if (r == 0)
520 continue;
521
522 r = unit_add_dependency_by_name(u, UNIT_AFTER, m);
523 free(m);
524
525 if (r < 0)
526 goto finish;
527 }
528 } else if (startswith(t, "Default-Start:")) {
529 char *k, *d;
530
531 state = LSB;
532
533 k = delete_chars(t+14, WHITESPACE "-");
534
535 if (k[0] != 0) {
536 if (!(d = strdup(k))) {
537 r = -ENOMEM;
538 goto finish;
539 }
540
541 free(s->sysv_runlevels);
542 s->sysv_runlevels = d;
543 }
544
545 } else if (startswith(t, "Description:")) {
546 char *d;
547
548 state = LSB_DESCRIPTION;
549
550 if (!(d = strdup(strstrip(t+12)))) {
551 r = -ENOMEM;
552 goto finish;
553 }
554
555 free(u->meta.description);
556 u->meta.description = d;
557
558 } else if (startswith(t, "Short-Description:") &&
559 !u->meta.description) {
560 char *d;
561
562 /* We use the short description only
563 * if no long description is set. */
564
565 state = LSB;
566
567 if (!(d = strdup(strstrip(t+18)))) {
568 r = -ENOMEM;
569 goto finish;
570 }
571
572 u->meta.description = d;
573
574 } else if (state == LSB_DESCRIPTION) {
575
576 if (startswith(l, "#\t") || startswith(l, "# ")) {
577 char *d;
578
579 assert(u->meta.description);
580 if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
581 r = -ENOMEM;
582 goto finish;
583 }
584
585 free(u->meta.description);
586 u->meta.description = d;
587 } else
588 state = LSB;
589 }
590 }
591 }
592
593 /* If init scripts have no LSB header, then we enforce the
594 * ordering via the chkconfig priorities. We try to determine
595 * a priority for *all* init scripts here, since they are
596 * needed as soon as at least one non-LSB script is used. */
597
598 if (s->sysv_start_priority < 0) {
599 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
600
601 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
602 goto finish;
603
604 if (s->sysv_start_priority < 0)
605 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
606 }
607
608 if ((r = sysv_exec_commands(s)) < 0)
609 goto finish;
610
611 if (!s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels)) {
612 /* If there a runlevels configured for this service
613 * but none of the standard ones, then we assume this
614 * is some special kind of service (which might be
615 * needed for early boot) and don't create any links
616 * to it. */
617
618 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 ||
619 (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0)
620 goto finish;
621 }
622
623 /* Special setting for all SysV services */
624 s->valid_no_process = true;
625
626 u->meta.load_state = UNIT_LOADED;
627 r = 0;
628
629 finish:
630
631 if (f)
632 fclose(f);
633
634 return r;
635 }
636
637 static int service_load_sysv_name(Service *s, const char *name) {
638 char **p;
639
640 assert(s);
641 assert(name);
642
643 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
644 char *path;
645 int r;
646
647 if (asprintf(&path, "%s/%s", *p, name) < 0)
648 return -ENOMEM;
649
650 assert(endswith(path, ".service"));
651 path[strlen(path)-8] = 0;
652
653 r = service_load_sysv_path(s, path);
654 free(path);
655
656 if (r < 0)
657 return r;
658
659 if ((UNIT(s)->meta.load_state != UNIT_STUB))
660 break;
661 }
662
663 return 0;
664 }
665
666 static int service_load_sysv(Service *s) {
667 const char *t;
668 Iterator i;
669 int r;
670
671 assert(s);
672
673 /* Load service data from SysV init scripts, preferably with
674 * LSB headers ... */
675
676 if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
677 return 0;
678
679 if ((t = unit_id(UNIT(s))))
680 if ((r = service_load_sysv_name(s, t)) < 0)
681 return r;
682
683 if (UNIT(s)->meta.load_state == UNIT_STUB)
684 SET_FOREACH(t, UNIT(s)->meta.names, i) {
685 if (t == unit_id(UNIT(s)))
686 continue;
687
688 if ((r == service_load_sysv_name(s, t)) < 0)
689 return r;
690
691 if (UNIT(s)->meta.load_state != UNIT_STUB)
692 break;
693 }
694
695 return 0;
696 }
697
698 static void service_init(Unit *u) {
699 Service *s = SERVICE(u);
700
701 assert(u);
702 assert(u->meta.load_state == UNIT_STUB);
703
704 s->type = 0;
705 s->restart = 0;
706
707 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
708 s->restart_usec = DEFAULT_RESTART_USEC;
709
710 exec_context_init(&s->exec_context);
711
712 s->timer_watch.type = WATCH_INVALID;
713
714 s->state = SERVICE_DEAD;
715
716 s->sysv_start_priority = -1;
717 s->permissions_start_only = false;
718 s->root_directory_start_only = false;
719 s->valid_no_process = false;
720 s->kill_mode = 0;
721 s->sysv_has_lsb = false;
722 s->main_pid = s->control_pid = 0;
723 s->main_pid_known = false;
724 s->failure = false;
725
726 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
727 }
728
729 static int service_verify(Service *s) {
730 assert(s);
731
732 if (UNIT(s)->meta.load_state != UNIT_LOADED)
733 return 0;
734
735 if (!s->exec_command[SERVICE_EXEC_START]) {
736 log_error("%s lacks ExecStart setting. Refusing.", unit_id(UNIT(s)));
737 return -EINVAL;
738 }
739
740 return 0;
741 }
742
743 static int service_load(Unit *u) {
744 int r;
745 Service *s = SERVICE(u);
746
747 assert(s);
748
749 /* Load a .service file */
750 if ((r = unit_load_fragment(u)) < 0)
751 return r;
752
753 /* Load a classic init script as a fallback, if we couldn't find anything */
754 if (u->meta.load_state == UNIT_STUB)
755 if ((r = service_load_sysv(s)) < 0)
756 return r;
757
758 /* Still nothing found? Then let's give up */
759 if (u->meta.load_state == UNIT_STUB)
760 return -ENOENT;
761
762 /* We were able to load something, then let's add in the
763 * dropin directories. */
764 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
765 return r;
766
767 /* This is a new unit? Then let's add in some extras */
768 if (u->meta.load_state == UNIT_LOADED) {
769 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
770 return r;
771
772 if ((r = unit_add_default_cgroup(u)) < 0)
773 return r;
774
775 if ((r = sysv_chkconfig_order(s)) < 0)
776 return r;
777 }
778
779 return service_verify(s);
780 }
781
782 static void service_dump(Unit *u, FILE *f, const char *prefix) {
783
784 ServiceExecCommand c;
785 Service *s = SERVICE(u);
786 const char *prefix2;
787 char *p2;
788
789 assert(s);
790
791 p2 = strappend(prefix, "\t");
792 prefix2 = p2 ? p2 : prefix;
793
794 fprintf(f,
795 "%sService State: %s\n"
796 "%sPermissionsStartOnly: %s\n"
797 "%sRootDirectoryStartOnly: %s\n"
798 "%sValidNoProcess: %s\n"
799 "%sKillMode: %s\n"
800 "%sType: %s\n",
801 prefix, service_state_to_string(s->state),
802 prefix, yes_no(s->permissions_start_only),
803 prefix, yes_no(s->root_directory_start_only),
804 prefix, yes_no(s->valid_no_process),
805 prefix, kill_mode_to_string(s->kill_mode),
806 prefix, service_type_to_string(s->type));
807
808 if (s->control_pid > 0)
809 fprintf(f,
810 "%sControl PID: %llu\n",
811 prefix, (unsigned long long) s->control_pid);
812
813 if (s->main_pid > 0)
814 fprintf(f,
815 "%sMain PID: %llu\n",
816 prefix, (unsigned long long) s->main_pid);
817
818 if (s->pid_file)
819 fprintf(f,
820 "%sPIDFile: %s\n",
821 prefix, s->pid_file);
822
823 exec_context_dump(&s->exec_context, f, prefix);
824
825 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
826
827 if (!s->exec_command[c])
828 continue;
829
830 fprintf(f, "%s→ %s:\n",
831 prefix, service_exec_command_to_string(c));
832
833 exec_command_dump_list(s->exec_command[c], f, prefix2);
834 }
835
836 if (s->sysv_path)
837 fprintf(f,
838 "%sSysV Init Script Path: %s\n"
839 "%sSysV Init Script has LSB Header: %s\n",
840 prefix, s->sysv_path,
841 prefix, yes_no(s->sysv_has_lsb));
842
843 if (s->sysv_start_priority >= 0)
844 fprintf(f,
845 "%sSysVStartPriority: %i\n",
846 prefix, s->sysv_start_priority);
847
848 if (s->sysv_runlevels)
849 fprintf(f, "%sSysVRunLevels: %s\n",
850 prefix, s->sysv_runlevels);
851
852 free(p2);
853 }
854
855 static int service_load_pid_file(Service *s) {
856 char *k;
857 unsigned long p;
858 int r;
859
860 assert(s);
861
862 if (s->main_pid_known)
863 return 0;
864
865 assert(s->main_pid <= 0);
866
867 if (!s->pid_file)
868 return -ENOENT;
869
870 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
871 return r;
872
873 if ((r = safe_atolu(k, &p)) < 0) {
874 free(k);
875 return r;
876 }
877
878 if ((unsigned long) (pid_t) p != p)
879 return -ERANGE;
880
881 if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
882 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
883 (unsigned long long) p, s->pid_file);
884 return -ESRCH;
885 }
886
887 if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
888 /* FIXME: we need to do something here */
889 return r;
890
891 s->main_pid = (pid_t) p;
892 s->main_pid_known = true;
893
894 return 0;
895 }
896
897 static int service_get_sockets(Service *s, Set **_set) {
898 Set *set;
899 Iterator i;
900 char *t;
901 int r;
902
903 assert(s);
904 assert(_set);
905
906 /* Collects all Socket objects that belong to this
907 * service. Note that a service might have multiple sockets
908 * via multiple names. */
909
910 if (!(set = set_new(NULL, NULL)))
911 return -ENOMEM;
912
913 SET_FOREACH(t, UNIT(s)->meta.names, i) {
914 char *k;
915 Unit *p;
916
917 /* Look for all socket objects that go by any of our
918 * units and collect their fds */
919
920 if (!(k = unit_name_change_suffix(t, ".socket"))) {
921 r = -ENOMEM;
922 goto fail;
923 }
924
925 p = manager_get_unit(UNIT(s)->meta.manager, k);
926 free(k);
927
928 if (!p) continue;
929
930 if ((r = set_put(set, p)) < 0)
931 goto fail;
932 }
933
934 *_set = set;
935 return 0;
936
937 fail:
938 set_free(set);
939 return r;
940 }
941
942
943 static int service_notify_sockets_dead(Service *s) {
944 Iterator i;
945 Set *set;
946 Socket *sock;
947 int r;
948
949 assert(s);
950
951 /* Notifies all our sockets when we die */
952
953 if ((r = service_get_sockets(s, &set)) < 0)
954 return r;
955
956 SET_FOREACH(sock, set, i)
957 socket_notify_service_dead(sock);
958
959 set_free(set);
960
961 return 0;
962 }
963
964 static void service_set_state(Service *s, ServiceState state) {
965 ServiceState old_state;
966 assert(s);
967
968 old_state = s->state;
969 s->state = state;
970
971 if (state != SERVICE_START_PRE &&
972 state != SERVICE_START &&
973 state != SERVICE_START_POST &&
974 state != SERVICE_RELOAD &&
975 state != SERVICE_STOP &&
976 state != SERVICE_STOP_SIGTERM &&
977 state != SERVICE_STOP_SIGKILL &&
978 state != SERVICE_STOP_POST &&
979 state != SERVICE_FINAL_SIGTERM &&
980 state != SERVICE_FINAL_SIGKILL &&
981 state != SERVICE_AUTO_RESTART)
982 unit_unwatch_timer(UNIT(s), &s->timer_watch);
983
984 if (state != SERVICE_START &&
985 state != SERVICE_START_POST &&
986 state != SERVICE_RUNNING &&
987 state != SERVICE_RELOAD &&
988 state != SERVICE_STOP &&
989 state != SERVICE_STOP_SIGTERM &&
990 state != SERVICE_STOP_SIGKILL)
991 service_unwatch_main_pid(s);
992
993 if (state != SERVICE_START_PRE &&
994 state != SERVICE_START &&
995 state != SERVICE_START_POST &&
996 state != SERVICE_RELOAD &&
997 state != SERVICE_STOP &&
998 state != SERVICE_STOP_SIGTERM &&
999 state != SERVICE_STOP_SIGKILL &&
1000 state != SERVICE_STOP_POST &&
1001 state != SERVICE_FINAL_SIGTERM &&
1002 state != SERVICE_FINAL_SIGKILL) {
1003 service_unwatch_control_pid(s);
1004 s->control_command = NULL;
1005 }
1006
1007 if (state == SERVICE_DEAD ||
1008 state == SERVICE_STOP ||
1009 state == SERVICE_STOP_SIGTERM ||
1010 state == SERVICE_STOP_SIGKILL ||
1011 state == SERVICE_STOP_POST ||
1012 state == SERVICE_FINAL_SIGTERM ||
1013 state == SERVICE_FINAL_SIGKILL ||
1014 state == SERVICE_MAINTAINANCE ||
1015 state == SERVICE_AUTO_RESTART)
1016 service_notify_sockets_dead(s);
1017
1018 if (old_state != state)
1019 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
1020
1021 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1022 }
1023
1024 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1025 Iterator i;
1026 int r;
1027 int *rfds = NULL;
1028 unsigned rn_fds = 0;
1029 Set *set;
1030 Socket *sock;
1031
1032 assert(s);
1033 assert(fds);
1034 assert(n_fds);
1035
1036 if ((r = service_get_sockets(s, &set)) < 0)
1037 return r;
1038
1039 SET_FOREACH(sock, set, i) {
1040 int *cfds;
1041 unsigned cn_fds;
1042
1043 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1044 goto fail;
1045
1046 if (!cfds)
1047 continue;
1048
1049 if (!rfds) {
1050 rfds = cfds;
1051 rn_fds = cn_fds;
1052 } else {
1053 int *t;
1054
1055 if (!(t = new(int, rn_fds+cn_fds))) {
1056 free(cfds);
1057 r = -ENOMEM;
1058 goto fail;
1059 }
1060
1061 memcpy(t, rfds, rn_fds);
1062 memcpy(t+rn_fds, cfds, cn_fds);
1063 free(rfds);
1064 free(cfds);
1065
1066 rfds = t;
1067 rn_fds = rn_fds+cn_fds;
1068 }
1069 }
1070
1071 *fds = rfds;
1072 *n_fds = rn_fds;
1073
1074 set_free(set);
1075
1076 return 0;
1077
1078 fail:
1079 set_free(set);
1080 free(rfds);
1081
1082 return r;
1083 }
1084
1085 static int service_spawn(
1086 Service *s,
1087 ExecCommand *c,
1088 bool timeout,
1089 bool pass_fds,
1090 bool apply_permissions,
1091 bool apply_chroot,
1092 pid_t *_pid) {
1093
1094 pid_t pid;
1095 int r;
1096 int *fds = NULL;
1097 unsigned n_fds = 0;
1098
1099 assert(s);
1100 assert(c);
1101 assert(_pid);
1102
1103 if (pass_fds)
1104 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1105 goto fail;
1106
1107 if (timeout) {
1108 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1109 goto fail;
1110 } else
1111 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1112
1113 if ((r = exec_spawn(c,
1114 &s->exec_context,
1115 fds, n_fds,
1116 apply_permissions,
1117 apply_chroot,
1118 UNIT(s)->meta.manager->confirm_spawn,
1119 UNIT(s)->meta.cgroup_bondings,
1120 &pid)) < 0)
1121 goto fail;
1122
1123 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1124 /* FIXME: we need to do something here */
1125 goto fail;
1126
1127 free(fds);
1128 *_pid = pid;
1129
1130 return 0;
1131
1132 fail:
1133 free(fds);
1134
1135 if (timeout)
1136 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1137
1138 return r;
1139 }
1140
1141 static int main_pid_good(Service *s) {
1142 assert(s);
1143
1144 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1145 * don't know */
1146
1147 /* If we know the pid file, then lets just check if it is
1148 * still valid */
1149 if (s->main_pid_known)
1150 return s->main_pid > 0;
1151
1152 /* We don't know the pid */
1153 return -EAGAIN;
1154 }
1155
1156 static int control_pid_good(Service *s) {
1157 assert(s);
1158
1159 return s->control_pid > 0;
1160 }
1161
1162 static int cgroup_good(Service *s) {
1163 int r;
1164
1165 assert(s);
1166
1167 if (s->valid_no_process)
1168 return -EAGAIN;
1169
1170 if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1171 return r;
1172
1173 return !r;
1174 }
1175
1176 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1177 int r;
1178 assert(s);
1179
1180 if (!success)
1181 s->failure = true;
1182
1183 if (allow_restart &&
1184 (s->restart == SERVICE_RESTART_ALWAYS ||
1185 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1186
1187 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1188 goto fail;
1189
1190 service_set_state(s, SERVICE_AUTO_RESTART);
1191 } else
1192 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1193
1194 return;
1195
1196 fail:
1197 log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1198 service_enter_dead(s, false, false);
1199 }
1200
1201 static void service_enter_signal(Service *s, ServiceState state, bool success);
1202
1203 static void service_enter_stop_post(Service *s, bool success) {
1204 int r;
1205 assert(s);
1206
1207 if (!success)
1208 s->failure = true;
1209
1210 service_unwatch_control_pid(s);
1211
1212 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1213 if ((r = service_spawn(s,
1214 s->control_command,
1215 true,
1216 false,
1217 !s->permissions_start_only,
1218 !s->root_directory_start_only,
1219 &s->control_pid)) < 0)
1220 goto fail;
1221
1222
1223 service_set_state(s, SERVICE_STOP_POST);
1224 } else
1225 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1226
1227 return;
1228
1229 fail:
1230 log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1231 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1232 }
1233
1234 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1235 int r;
1236 bool sent = false;
1237
1238 assert(s);
1239
1240 if (!success)
1241 s->failure = true;
1242
1243 if (s->kill_mode != KILL_NONE) {
1244 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1245
1246 if (s->kill_mode == KILL_CONTROL_GROUP) {
1247
1248 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1249 if (r != -EAGAIN && r != -ESRCH)
1250 goto fail;
1251 } else
1252 sent = true;
1253 }
1254
1255 if (!sent) {
1256 r = 0;
1257
1258 if (s->main_pid > 0) {
1259 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1260 r = -errno;
1261 else
1262 sent = true;
1263 }
1264
1265 if (s->control_pid > 0) {
1266 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1267 r = -errno;
1268 else
1269 sent = true;
1270 }
1271
1272 if (r < 0)
1273 goto fail;
1274 }
1275 }
1276
1277 if (sent) {
1278 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1279 goto fail;
1280
1281 service_set_state(s, state);
1282 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1283 service_enter_stop_post(s, true);
1284 else
1285 service_enter_dead(s, true, true);
1286
1287 return;
1288
1289 fail:
1290 log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1291
1292 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1293 service_enter_stop_post(s, false);
1294 else
1295 service_enter_dead(s, false, true);
1296 }
1297
1298 static void service_enter_stop(Service *s, bool success) {
1299 int r;
1300 assert(s);
1301
1302 if (!success)
1303 s->failure = true;
1304
1305 service_unwatch_control_pid(s);
1306
1307 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1308 if ((r = service_spawn(s,
1309 s->control_command,
1310 true,
1311 false,
1312 !s->permissions_start_only,
1313 !s->root_directory_start_only,
1314 &s->control_pid)) < 0)
1315 goto fail;
1316
1317 service_set_state(s, SERVICE_STOP);
1318 } else
1319 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1320
1321 return;
1322
1323 fail:
1324 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1325 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1326 }
1327
1328 static void service_enter_running(Service *s, bool success) {
1329 assert(s);
1330
1331 if (!success)
1332 s->failure = true;
1333
1334 if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1335 service_set_state(s, SERVICE_RUNNING);
1336 else if (s->valid_no_process)
1337 service_set_state(s, SERVICE_EXITED);
1338 else
1339 service_enter_stop(s, true);
1340 }
1341
1342 static void service_enter_start_post(Service *s) {
1343 int r;
1344 assert(s);
1345
1346 service_unwatch_control_pid(s);
1347
1348 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1349 if ((r = service_spawn(s,
1350 s->control_command,
1351 true,
1352 false,
1353 !s->permissions_start_only,
1354 !s->root_directory_start_only,
1355 &s->control_pid)) < 0)
1356 goto fail;
1357
1358
1359 service_set_state(s, SERVICE_START_POST);
1360 } else
1361 service_enter_running(s, true);
1362
1363 return;
1364
1365 fail:
1366 log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1367 service_enter_stop(s, false);
1368 }
1369
1370 static void service_enter_start(Service *s) {
1371 pid_t pid;
1372 int r;
1373
1374 assert(s);
1375
1376 assert(s->exec_command[SERVICE_EXEC_START]);
1377 assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1378
1379 if (s->type == SERVICE_FORKING)
1380 service_unwatch_control_pid(s);
1381 else
1382 service_unwatch_main_pid(s);
1383
1384 if ((r = service_spawn(s,
1385 s->exec_command[SERVICE_EXEC_START],
1386 s->type == SERVICE_FORKING,
1387 true,
1388 true,
1389 true,
1390 &pid)) < 0)
1391 goto fail;
1392
1393 if (s->type == SERVICE_SIMPLE) {
1394 /* For simple services we immediately start
1395 * the START_POST binaries. */
1396
1397 s->main_pid = pid;
1398 s->main_pid_known = true;
1399
1400 service_enter_start_post(s);
1401
1402 } else if (s->type == SERVICE_FORKING) {
1403
1404 /* For forking services we wait until the start
1405 * process exited. */
1406
1407 s->control_pid = pid;
1408
1409 s->control_command = s->exec_command[SERVICE_EXEC_START];
1410 service_set_state(s, SERVICE_START);
1411
1412 } else if (s->type == SERVICE_FINISH) {
1413
1414 /* For finishing services we wait until the start
1415 * process exited, too, but it is our main process. */
1416
1417 s->main_pid = pid;
1418 s->main_pid_known = true;
1419
1420 s->control_command = s->exec_command[SERVICE_EXEC_START];
1421 service_set_state(s, SERVICE_START);
1422 } else
1423 assert_not_reached("Unknown service type");
1424
1425 return;
1426
1427 fail:
1428 log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1429 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1430 }
1431
1432 static void service_enter_start_pre(Service *s) {
1433 int r;
1434
1435 assert(s);
1436
1437 service_unwatch_control_pid(s);
1438
1439 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1440 if ((r = service_spawn(s,
1441 s->control_command,
1442 true,
1443 false,
1444 !s->permissions_start_only,
1445 !s->root_directory_start_only,
1446 &s->control_pid)) < 0)
1447 goto fail;
1448
1449 service_set_state(s, SERVICE_START_PRE);
1450 } else
1451 service_enter_start(s);
1452
1453 return;
1454
1455 fail:
1456 log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1457 service_enter_dead(s, false, true);
1458 }
1459
1460 static void service_enter_restart(Service *s) {
1461 int r;
1462 assert(s);
1463
1464 service_enter_dead(s, true, false);
1465
1466 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1467 goto fail;
1468
1469 log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1470 return;
1471
1472 fail:
1473
1474 log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1475 service_enter_dead(s, false, false);
1476 }
1477
1478 static void service_enter_reload(Service *s) {
1479 int r;
1480
1481 assert(s);
1482
1483 service_unwatch_control_pid(s);
1484
1485 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1486 if ((r = service_spawn(s,
1487 s->control_command,
1488 true,
1489 false,
1490 !s->permissions_start_only,
1491 !s->root_directory_start_only,
1492 &s->control_pid)) < 0)
1493 goto fail;
1494
1495 service_set_state(s, SERVICE_RELOAD);
1496 } else
1497 service_enter_running(s, true);
1498
1499 return;
1500
1501 fail:
1502 log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1503 service_enter_stop(s, false);
1504 }
1505
1506 static void service_run_next(Service *s, bool success) {
1507 int r;
1508
1509 assert(s);
1510 assert(s->control_command);
1511 assert(s->control_command->command_next);
1512
1513 if (!success)
1514 s->failure = true;
1515
1516 s->control_command = s->control_command->command_next;
1517
1518 service_unwatch_control_pid(s);
1519
1520 if ((r = service_spawn(s,
1521 s->control_command,
1522 true,
1523 false,
1524 !s->permissions_start_only,
1525 !s->root_directory_start_only,
1526 &s->control_pid)) < 0)
1527 goto fail;
1528
1529 return;
1530
1531 fail:
1532 log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1533
1534 if (s->state == SERVICE_START_PRE)
1535 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1536 else if (s->state == SERVICE_STOP)
1537 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1538 else if (s->state == SERVICE_STOP_POST)
1539 service_enter_dead(s, false, true);
1540 else
1541 service_enter_stop(s, false);
1542 }
1543
1544 static int service_start(Unit *u) {
1545 Service *s = SERVICE(u);
1546
1547 assert(s);
1548
1549 /* We cannot fulfill this request right now, try again later
1550 * please! */
1551 if (s->state == SERVICE_STOP ||
1552 s->state == SERVICE_STOP_SIGTERM ||
1553 s->state == SERVICE_STOP_SIGKILL ||
1554 s->state == SERVICE_STOP_POST ||
1555 s->state == SERVICE_FINAL_SIGTERM ||
1556 s->state == SERVICE_FINAL_SIGKILL)
1557 return -EAGAIN;
1558
1559 /* Already on it! */
1560 if (s->state == SERVICE_START_PRE ||
1561 s->state == SERVICE_START ||
1562 s->state == SERVICE_START_POST)
1563 return 0;
1564
1565 assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1566
1567 /* Make sure we don't enter a busy loop of some kind. */
1568 if (!ratelimit_test(&s->ratelimit)) {
1569 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1570 return -EAGAIN;
1571 }
1572
1573 s->failure = false;
1574 s->main_pid_known = false;
1575
1576 service_enter_start_pre(s);
1577 return 0;
1578 }
1579
1580 static int service_stop(Unit *u) {
1581 Service *s = SERVICE(u);
1582
1583 assert(s);
1584
1585 /* Cannot do this now */
1586 if (s->state == SERVICE_START_PRE ||
1587 s->state == SERVICE_START ||
1588 s->state == SERVICE_START_POST ||
1589 s->state == SERVICE_RELOAD)
1590 return -EAGAIN;
1591
1592 /* Already on it */
1593 if (s->state == SERVICE_STOP ||
1594 s->state == SERVICE_STOP_SIGTERM ||
1595 s->state == SERVICE_STOP_SIGKILL ||
1596 s->state == SERVICE_STOP_POST ||
1597 s->state == SERVICE_FINAL_SIGTERM ||
1598 s->state == SERVICE_FINAL_SIGKILL)
1599 return 0;
1600
1601 if (s->state == SERVICE_AUTO_RESTART) {
1602 service_set_state(s, SERVICE_DEAD);
1603 return 0;
1604 }
1605
1606 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1607
1608 service_enter_stop(s, true);
1609 return 0;
1610 }
1611
1612 static int service_reload(Unit *u) {
1613 Service *s = SERVICE(u);
1614
1615 assert(s);
1616
1617 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1618
1619 service_enter_reload(s);
1620 return 0;
1621 }
1622
1623 static bool service_can_reload(Unit *u) {
1624 Service *s = SERVICE(u);
1625
1626 assert(s);
1627
1628 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1629 }
1630
1631 static UnitActiveState service_active_state(Unit *u) {
1632 assert(u);
1633
1634 return state_translation_table[SERVICE(u)->state];
1635 }
1636
1637 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1638 Service *s = SERVICE(u);
1639 bool success;
1640
1641 assert(s);
1642 assert(pid >= 0);
1643
1644 success = code == CLD_EXITED && status == 0;
1645 s->failure = s->failure || !success;
1646
1647 if (s->main_pid == pid) {
1648
1649 exec_status_fill(&s->main_exec_status, pid, code, status);
1650 s->main_pid = 0;
1651
1652 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1653 assert(s->exec_command[SERVICE_EXEC_START]);
1654 s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1655 }
1656
1657 log_debug("%s: main process exited, code=%s, status=%i", unit_id(u), sigchld_code_to_string(code), status);
1658
1659 /* The service exited, so the service is officially
1660 * gone. */
1661
1662 switch (s->state) {
1663
1664 case SERVICE_START_POST:
1665 case SERVICE_RELOAD:
1666 case SERVICE_STOP:
1667 /* Need to wait until the operation is
1668 * done */
1669 break;
1670
1671 case SERVICE_START:
1672 assert(s->type == SERVICE_FINISH);
1673
1674 /* This was our main goal, so let's go on */
1675 if (success)
1676 service_enter_start_post(s);
1677 else
1678 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1679 break;
1680
1681 case SERVICE_RUNNING:
1682 service_enter_running(s, success);
1683 break;
1684
1685 case SERVICE_STOP_SIGTERM:
1686 case SERVICE_STOP_SIGKILL:
1687
1688 if (!control_pid_good(s))
1689 service_enter_stop_post(s, success);
1690
1691 /* If there is still a control process, wait for that first */
1692 break;
1693
1694 default:
1695 assert_not_reached("Uh, main process died at wrong time.");
1696 }
1697
1698 } else if (s->control_pid == pid) {
1699 assert(s->control_command);
1700
1701 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1702 s->control_pid = 0;
1703
1704 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1705
1706 /* If we are shutting things down anyway we
1707 * don't care about failing commands. */
1708
1709 if (s->control_command->command_next && success) {
1710
1711 /* There is another command to *
1712 * execute, so let's do that. */
1713
1714 log_debug("%s running next command for state %s", unit_id(u), service_state_to_string(s->state));
1715 service_run_next(s, success);
1716
1717 } else {
1718 /* No further commands for this step, so let's
1719 * figure out what to do next */
1720
1721 log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1722
1723 switch (s->state) {
1724
1725 case SERVICE_START_PRE:
1726 if (success)
1727 service_enter_start(s);
1728 else
1729 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1730 break;
1731
1732 case SERVICE_START:
1733 assert(s->type == SERVICE_FORKING);
1734
1735 /* Let's try to load the pid
1736 * file here if we can. We
1737 * ignore the return value,
1738 * since the PID file might
1739 * actually be created by a
1740 * START_POST script */
1741
1742 if (success) {
1743 if (s->pid_file)
1744 service_load_pid_file(s);
1745
1746 service_enter_start_post(s);
1747 } else
1748 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1749
1750 break;
1751
1752 case SERVICE_START_POST:
1753 if (success && s->pid_file && !s->main_pid_known) {
1754 int r;
1755
1756 /* Hmm, let's see if we can
1757 * load the pid now after the
1758 * start-post scripts got
1759 * executed. */
1760
1761 if ((r = service_load_pid_file(s)) < 0)
1762 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1763 }
1764
1765 /* Fall through */
1766
1767 case SERVICE_RELOAD:
1768 if (success)
1769 service_enter_running(s, true);
1770 else
1771 service_enter_stop(s, false);
1772
1773 break;
1774
1775 case SERVICE_STOP:
1776 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1777 break;
1778
1779 case SERVICE_STOP_SIGTERM:
1780 case SERVICE_STOP_SIGKILL:
1781 if (main_pid_good(s) <= 0)
1782 service_enter_stop_post(s, success);
1783
1784 /* If there is still a service
1785 * process around, wait until
1786 * that one quit, too */
1787 break;
1788
1789 case SERVICE_STOP_POST:
1790 case SERVICE_FINAL_SIGTERM:
1791 case SERVICE_FINAL_SIGKILL:
1792 service_enter_dead(s, success, true);
1793 break;
1794
1795 default:
1796 assert_not_reached("Uh, control process died at wrong time.");
1797 }
1798 }
1799 } else
1800 assert_not_reached("Got SIGCHLD for unkown PID");
1801 }
1802
1803 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1804 Service *s = SERVICE(u);
1805
1806 assert(s);
1807 assert(elapsed == 1);
1808
1809 assert(w == &s->timer_watch);
1810
1811 switch (s->state) {
1812
1813 case SERVICE_START_PRE:
1814 case SERVICE_START:
1815 log_warning("%s operation timed out. Terminating.", unit_id(u));
1816 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1817 break;
1818
1819 case SERVICE_START_POST:
1820 case SERVICE_RELOAD:
1821 log_warning("%s operation timed out. Stopping.", unit_id(u));
1822 service_enter_stop(s, false);
1823 break;
1824
1825 case SERVICE_STOP:
1826 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1827 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1828 break;
1829
1830 case SERVICE_STOP_SIGTERM:
1831 log_warning("%s stopping timed out. Killing.", unit_id(u));
1832 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1833 break;
1834
1835 case SERVICE_STOP_SIGKILL:
1836 /* Uh, wie sent a SIGKILL and it is still not gone?
1837 * Must be something we cannot kill, so let's just be
1838 * weirded out and continue */
1839
1840 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1841 service_enter_stop_post(s, false);
1842 break;
1843
1844 case SERVICE_STOP_POST:
1845 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1846 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1847 break;
1848
1849 case SERVICE_FINAL_SIGTERM:
1850 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1851 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1852 break;
1853
1854 case SERVICE_FINAL_SIGKILL:
1855 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1856 service_enter_dead(s, false, true);
1857 break;
1858
1859 case SERVICE_AUTO_RESTART:
1860 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1861 service_enter_restart(s);
1862 break;
1863
1864 default:
1865 assert_not_reached("Timeout at wrong time.");
1866 }
1867 }
1868
1869 static void service_cgroup_notify_event(Unit *u) {
1870 Service *s = SERVICE(u);
1871
1872 assert(u);
1873
1874 log_debug("%s: cgroup is empty", unit_id(u));
1875
1876 switch (s->state) {
1877
1878 /* Waiting for SIGCHLD is usually more interesting,
1879 * because it includes return codes/signals. Which is
1880 * why we ignore the cgroup events for most cases,
1881 * except when we don't know pid which to expect the
1882 * SIGCHLD for. */
1883
1884 case SERVICE_RUNNING:
1885 service_enter_running(s, true);
1886 break;
1887
1888 default:
1889 ;
1890 }
1891 }
1892
1893 static int service_enumerate(Manager *m) {
1894 char **p;
1895 unsigned i;
1896 DIR *d = NULL;
1897 char *path = NULL, *fpath = NULL, *name = NULL;
1898 int r;
1899
1900 assert(m);
1901
1902 STRV_FOREACH(p, m->sysvrcnd_path)
1903 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1904 struct dirent *de;
1905
1906 free(path);
1907 path = NULL;
1908 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1909 r = -ENOMEM;
1910 goto finish;
1911 }
1912
1913 if (d)
1914 closedir(d);
1915
1916 if (!(d = opendir(path))) {
1917 if (errno != ENOENT)
1918 log_warning("opendir() failed on %s: %s", path, strerror(errno));
1919
1920 continue;
1921 }
1922
1923 while ((de = readdir(d))) {
1924 Unit *runlevel, *service;
1925
1926 if (ignore_file(de->d_name))
1927 continue;
1928
1929 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1930 continue;
1931
1932 if (strlen(de->d_name) < 4)
1933 continue;
1934
1935 free(fpath);
1936 fpath = NULL;
1937 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1938 r = -ENOMEM;
1939 goto finish;
1940 }
1941
1942 if (access(fpath, X_OK) < 0) {
1943
1944 if (errno != ENOENT)
1945 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1946
1947 continue;
1948 }
1949
1950 free(name);
1951 name = NULL;
1952 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1953 r = -ENOMEM;
1954 goto finish;
1955 }
1956
1957 if ((r = manager_load_unit(m, name, &service)) < 0)
1958 goto finish;
1959
1960 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1961 goto finish;
1962
1963 if (de->d_name[0] == 'S') {
1964 if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1965 goto finish;
1966
1967 if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1968 goto finish;
1969
1970 } else if (de->d_name[0] == 'K' &&
1971 (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1972 streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1973
1974 /* We honour K links only for
1975 * halt/reboot. For the normal
1976 * runlevels we assume the
1977 * stop jobs will be
1978 * implicitly added by the
1979 * core logic. */
1980
1981 if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1982 goto finish;
1983
1984 if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1985 goto finish;
1986 }
1987 }
1988 }
1989
1990 r = 0;
1991
1992 finish:
1993 free(path);
1994 free(fpath);
1995 free(name);
1996 closedir(d);
1997
1998 return r;
1999 }
2000
2001 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2002 [SERVICE_DEAD] = "dead",
2003 [SERVICE_START_PRE] = "start-pre",
2004 [SERVICE_START] = "start",
2005 [SERVICE_START_POST] = "start-post",
2006 [SERVICE_RUNNING] = "running",
2007 [SERVICE_EXITED] = "exited",
2008 [SERVICE_RELOAD] = "reload",
2009 [SERVICE_STOP] = "stop",
2010 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2011 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2012 [SERVICE_STOP_POST] = "stop-post",
2013 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2014 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2015 [SERVICE_MAINTAINANCE] = "maintainance",
2016 [SERVICE_AUTO_RESTART] = "auto-restart",
2017 };
2018
2019 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2020
2021 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2022 [SERVICE_ONCE] = "once",
2023 [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2024 [SERVICE_RESTART_ALWAYS] = "restart-always",
2025 };
2026
2027 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2028
2029 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2030 [SERVICE_FORKING] = "forking",
2031 [SERVICE_SIMPLE] = "simple",
2032 [SERVICE_FINISH] = "finish"
2033 };
2034
2035 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2036
2037 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2038 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2039 [SERVICE_EXEC_START] = "ExecStart",
2040 [SERVICE_EXEC_START_POST] = "ExecStartPost",
2041 [SERVICE_EXEC_RELOAD] = "ExecReload",
2042 [SERVICE_EXEC_STOP] = "ExecStop",
2043 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2044 };
2045
2046 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2047
2048 const UnitVTable service_vtable = {
2049 .suffix = ".service",
2050
2051 .init = service_init,
2052 .load = service_load,
2053 .done = service_done,
2054
2055 .dump = service_dump,
2056
2057 .start = service_start,
2058 .stop = service_stop,
2059 .reload = service_reload,
2060
2061 .can_reload = service_can_reload,
2062
2063 .active_state = service_active_state,
2064
2065 .sigchld_event = service_sigchld_event,
2066 .timer_event = service_timer_event,
2067
2068 .cgroup_notify_empty = service_cgroup_notify_event,
2069
2070 .enumerate = service_enumerate
2071 };
Michael's branch of systemd.