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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 #include "unit-name.h"
34 #include "dbus-service.h"
35
36 #define COMMENTS "#;\n"
37 #define NEWLINES "\n\r"
38 #define LINE_MAX 4096
39
40 static const char * const rcnd_table[] = {
41 "/rc0.d", SPECIAL_RUNLEVEL0_TARGET,
42 "/rc1.d", SPECIAL_RUNLEVEL1_TARGET,
43 "/rc2.d", SPECIAL_RUNLEVEL2_TARGET,
44 "/rc3.d", SPECIAL_RUNLEVEL3_TARGET,
45 "/rc4.d", SPECIAL_RUNLEVEL4_TARGET,
46 "/rc5.d", SPECIAL_RUNLEVEL5_TARGET,
47 "/rc6.d", SPECIAL_RUNLEVEL6_TARGET,
48 "/boot.d", SPECIAL_BASIC_TARGET
49 };
50
51 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
52 [SERVICE_DEAD] = UNIT_INACTIVE,
53 [SERVICE_START_PRE] = UNIT_ACTIVATING,
54 [SERVICE_START] = UNIT_ACTIVATING,
55 [SERVICE_START_POST] = UNIT_ACTIVATING,
56 [SERVICE_RUNNING] = UNIT_ACTIVE,
57 [SERVICE_EXITED] = UNIT_ACTIVE,
58 [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
59 [SERVICE_STOP] = UNIT_DEACTIVATING,
60 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
61 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
62 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
63 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
64 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
65 [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
66 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
67 };
68
69 static void service_init(Unit *u) {
70 Service *s = SERVICE(u);
71
72 assert(u);
73 assert(u->meta.load_state == UNIT_STUB);
74
75 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
76 s->restart_usec = DEFAULT_RESTART_USEC;
77 s->timer_watch.type = WATCH_INVALID;
78 s->sysv_start_priority = -1;
79 s->socket_fd = -1;
80
81 exec_context_init(&s->exec_context);
82
83 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
84
85 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
86 }
87
88 static void service_unwatch_control_pid(Service *s) {
89 assert(s);
90
91 if (s->control_pid <= 0)
92 return;
93
94 unit_unwatch_pid(UNIT(s), s->control_pid);
95 s->control_pid = 0;
96 }
97
98 static void service_unwatch_main_pid(Service *s) {
99 assert(s);
100
101 if (s->main_pid <= 0)
102 return;
103
104 unit_unwatch_pid(UNIT(s), s->main_pid);
105 s->main_pid = 0;
106 }
107
108 static void service_close_socket_fd(Service *s) {
109 assert(s);
110
111 if (s->socket_fd < 0)
112 return;
113
114 close_nointr_nofail(s->socket_fd);
115 s->socket_fd = -1;
116 }
117
118 static void service_done(Unit *u) {
119 Service *s = SERVICE(u);
120
121 assert(s);
122
123 free(s->pid_file);
124 s->pid_file = NULL;
125
126 free(s->sysv_path);
127 s->sysv_path = NULL;
128
129 free(s->sysv_runlevels);
130 s->sysv_runlevels = NULL;
131
132 exec_context_done(&s->exec_context);
133 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
134 s->control_command = NULL;
135
136 /* This will leak a process, but at least no memory or any of
137 * our resources */
138 service_unwatch_main_pid(s);
139 service_unwatch_control_pid(s);
140
141 if (s->bus_name) {
142 unit_unwatch_bus_name(UNIT(u), s->bus_name);
143 free(s->bus_name);
144 s->bus_name = NULL;
145 }
146
147 service_close_socket_fd(s);
148
149 unit_unwatch_timer(u, &s->timer_watch);
150 }
151
152 static int sysv_translate_name(const char *name, char **_r) {
153
154 static const char * const table[] = {
155 "$local_fs", SPECIAL_LOCAL_FS_TARGET,
156 "$network", SPECIAL_NETWORK_TARGET,
157 "$named", SPECIAL_NSS_LOOKUP_TARGET,
158 "$portmap", SPECIAL_RPCBIND_TARGET,
159 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
160 "$syslog", SPECIAL_SYSLOG_TARGET,
161 "$time", SPECIAL_RTC_SET_TARGET
162 };
163
164 unsigned i;
165 char *r;
166
167 for (i = 0; i < ELEMENTSOF(table); i += 2)
168 if (streq(table[i], name)) {
169 if (!(r = strdup(table[i+1])))
170 return -ENOMEM;
171
172 goto finish;
173 }
174
175 if (*name == '$')
176 return 0;
177
178 if (asprintf(&r, "%s.service", name) < 0)
179 return -ENOMEM;
180
181 finish:
182
183 if (_r)
184 *_r = r;
185
186 return 1;
187 }
188
189 static int sysv_chkconfig_order(Service *s) {
190 Meta *other;
191 int r;
192
193 assert(s);
194
195 if (s->sysv_start_priority < 0)
196 return 0;
197
198 /* For each pair of services where at least one lacks a LSB
199 * header, we use the start priority value to order things. */
200
201 LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
202 Service *t;
203 UnitDependency d;
204
205 t = (Service*) other;
206
207 if (s == t)
208 continue;
209
210 if (t->sysv_start_priority < 0)
211 continue;
212
213 /* If both units have modern headers we don't care
214 * about the priorities */
215 if ((!s->sysv_path || s->sysv_has_lsb) &&
216 (!t->sysv_path || t->sysv_has_lsb))
217 continue;
218
219 if (t->sysv_start_priority < s->sysv_start_priority)
220 d = UNIT_AFTER;
221 else if (t->sysv_start_priority > s->sysv_start_priority)
222 d = UNIT_BEFORE;
223 else
224 continue;
225
226 /* FIXME: Maybe we should compare the name here lexicographically? */
227
228 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
229 return r;
230 }
231
232 return 0;
233 }
234
235 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
236 ExecCommand *c;
237
238 if (!(c = new0(ExecCommand, 1)))
239 return NULL;
240
241 if (!(c->path = strdup(path))) {
242 free(c);
243 return NULL;
244 }
245
246 if (!(c->argv = strv_new(path, arg1, NULL))) {
247 free(c->path);
248 free(c);
249 return NULL;
250 }
251
252 return c;
253 }
254
255 static int sysv_exec_commands(Service *s) {
256 ExecCommand *c;
257
258 assert(s);
259 assert(s->sysv_path);
260
261 if (!(c = exec_command_new(s->sysv_path, "start")))
262 return -ENOMEM;
263 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
264
265 if (!(c = exec_command_new(s->sysv_path, "stop")))
266 return -ENOMEM;
267 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
268
269 if (!(c = exec_command_new(s->sysv_path, "reload")))
270 return -ENOMEM;
271 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
272
273 return 0;
274 }
275
276 static int priority_from_rcd(Service *s, const char *init_script) {
277 char **p;
278 unsigned i;
279
280 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
281 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
282 char *path;
283 DIR *d;
284 struct dirent *de;
285
286 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
287 return -ENOMEM;
288
289 d = opendir(path);
290 free(path);
291
292 if (!d) {
293 if (errno != ENOENT)
294 log_warning("opendir() failed on %s: %s", path, strerror(errno));
295
296 continue;
297 }
298
299 while ((de = readdir(d))) {
300 int a, b;
301
302 if (ignore_file(de->d_name))
303 continue;
304
305 if (de->d_name[0] != 'S')
306 continue;
307
308 if (strlen(de->d_name) < 4)
309 continue;
310
311 if (!streq(de->d_name + 3, init_script))
312 continue;
313
314 /* Yay, we found it! Now decode the priority */
315
316 a = undecchar(de->d_name[1]);
317 b = undecchar(de->d_name[2]);
318
319 if (a < 0 || b < 0)
320 continue;
321
322 s->sysv_start_priority = a*10 + b;
323
324 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, UNIT(s)->meta.id);
325
326 closedir(d);
327 return 0;
328 }
329
330 closedir(d);
331 }
332
333 return 0;
334 }
335
336 static int service_load_sysv_path(Service *s, const char *path) {
337 FILE *f;
338 Unit *u;
339 unsigned line = 0;
340 int r;
341 enum {
342 NORMAL,
343 DESCRIPTION,
344 LSB,
345 LSB_DESCRIPTION
346 } state = NORMAL;
347
348 assert(s);
349 assert(path);
350
351 u = UNIT(s);
352
353 if (!(f = fopen(path, "re"))) {
354 r = errno == ENOENT ? 0 : -errno;
355 goto finish;
356 }
357
358 s->type = SERVICE_FORKING;
359 s->restart = SERVICE_ONCE;
360
361 free(s->sysv_path);
362 if (!(s->sysv_path = strdup(path))) {
363 r = -ENOMEM;
364 goto finish;
365 }
366
367 while (!feof(f)) {
368 char l[LINE_MAX], *t;
369
370 if (!fgets(l, sizeof(l), f)) {
371 if (feof(f))
372 break;
373
374 r = -errno;
375 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
376 goto finish;
377 }
378
379 line++;
380
381 t = strstrip(l);
382 if (*t != '#')
383 continue;
384
385 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
386 state = LSB;
387 s->sysv_has_lsb = true;
388 continue;
389 }
390
391 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
392 state = NORMAL;
393 continue;
394 }
395
396 t++;
397 t += strspn(t, WHITESPACE);
398
399 if (state == NORMAL) {
400
401 /* Try to parse Red Hat style chkconfig headers */
402
403 if (startswith(t, "chkconfig:")) {
404 int start_priority;
405 char runlevels[16], *k;
406
407 state = NORMAL;
408
409 if (sscanf(t+10, "%15s %i %*i",
410 runlevels,
411 &start_priority) != 2) {
412
413 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
414 continue;
415 }
416
417 if (start_priority < 0 || start_priority > 99)
418 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
419 else
420 s->sysv_start_priority = start_priority;
421
422 char_array_0(runlevels);
423 k = delete_chars(runlevels, WHITESPACE "-");
424
425 if (k[0]) {
426 char *d;
427
428 if (!(d = strdup(k))) {
429 r = -ENOMEM;
430 goto finish;
431 }
432
433 free(s->sysv_runlevels);
434 s->sysv_runlevels = d;
435 }
436
437
438 } else if (startswith(t, "description:")) {
439
440 size_t k = strlen(t);
441 char *d;
442
443 if (t[k-1] == '\\') {
444 state = DESCRIPTION;
445 t[k-1] = 0;
446 }
447
448 if (!(d = strdup(strstrip(t+12)))) {
449 r = -ENOMEM;
450 goto finish;
451 }
452
453 free(u->meta.description);
454 u->meta.description = d;
455
456 } else if (startswith(t, "pidfile:")) {
457
458 char *fn;
459
460 state = NORMAL;
461
462 fn = strstrip(t+8);
463 if (!path_is_absolute(fn)) {
464 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
465 continue;
466 }
467
468 if (!(fn = strdup(fn))) {
469 r = -ENOMEM;
470 goto finish;
471 }
472
473 free(s->pid_file);
474 s->pid_file = fn;
475 }
476
477 } else if (state == DESCRIPTION) {
478
479 /* Try to parse Red Hat style description
480 * continuation */
481
482 size_t k = strlen(t);
483 char *d;
484
485 if (t[k-1] == '\\')
486 t[k-1] = 0;
487 else
488 state = NORMAL;
489
490 assert(u->meta.description);
491 if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
492 r = -ENOMEM;
493 goto finish;
494 }
495
496 free(u->meta.description);
497 u->meta.description = d;
498
499 } else if (state == LSB || state == LSB_DESCRIPTION) {
500
501 if (startswith(t, "Provides:")) {
502 char *i, *w;
503 size_t z;
504
505 state = LSB;
506
507 FOREACH_WORD(w, z, t+9, i) {
508 char *n, *m;
509
510 if (!(n = strndup(w, z))) {
511 r = -ENOMEM;
512 goto finish;
513 }
514
515 r = sysv_translate_name(n, &m);
516 free(n);
517
518 if (r < 0)
519 goto finish;
520
521 if (r == 0)
522 continue;
523
524 if (unit_name_to_type(m) == UNIT_SERVICE)
525 r = unit_add_name(u, m);
526 else {
527 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m, NULL, true)) >= 0)
528 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
529 }
530
531 free(m);
532
533 if (r < 0)
534 goto finish;
535 }
536
537 } else if (startswith(t, "Required-Start:") ||
538 startswith(t, "Should-Start:")) {
539 char *i, *w;
540 size_t z;
541
542 state = LSB;
543
544 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
545 char *n, *m;
546
547 if (!(n = strndup(w, z))) {
548 r = -ENOMEM;
549 goto finish;
550 }
551
552 r = sysv_translate_name(n, &m);
553 free(n);
554
555 if (r < 0)
556 goto finish;
557
558 if (r == 0)
559 continue;
560
561 r = unit_add_dependency_by_name(u, UNIT_AFTER, m, NULL, true);
562 free(m);
563
564 if (r < 0)
565 goto finish;
566 }
567 } else if (startswith(t, "Default-Start:")) {
568 char *k, *d;
569
570 state = LSB;
571
572 k = delete_chars(t+14, WHITESPACE "-");
573
574 if (k[0] != 0) {
575 if (!(d = strdup(k))) {
576 r = -ENOMEM;
577 goto finish;
578 }
579
580 free(s->sysv_runlevels);
581 s->sysv_runlevels = d;
582 }
583
584 } else if (startswith(t, "Description:")) {
585 char *d;
586
587 state = LSB_DESCRIPTION;
588
589 if (!(d = strdup(strstrip(t+12)))) {
590 r = -ENOMEM;
591 goto finish;
592 }
593
594 free(u->meta.description);
595 u->meta.description = d;
596
597 } else if (startswith(t, "Short-Description:") &&
598 !u->meta.description) {
599 char *d;
600
601 /* We use the short description only
602 * if no long description is set. */
603
604 state = LSB;
605
606 if (!(d = strdup(strstrip(t+18)))) {
607 r = -ENOMEM;
608 goto finish;
609 }
610
611 u->meta.description = d;
612
613 } else if (state == LSB_DESCRIPTION) {
614
615 if (startswith(l, "#\t") || startswith(l, "# ")) {
616 char *d;
617
618 assert(u->meta.description);
619 if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
620 r = -ENOMEM;
621 goto finish;
622 }
623
624 free(u->meta.description);
625 u->meta.description = d;
626 } else
627 state = LSB;
628 }
629 }
630 }
631
632 /* If init scripts have no LSB header, then we enforce the
633 * ordering via the chkconfig priorities. We try to determine
634 * a priority for *all* init scripts here, since they are
635 * needed as soon as at least one non-LSB script is used. */
636
637 if (s->sysv_start_priority < 0) {
638 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", u->meta.id);
639
640 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
641 goto finish;
642
643 if (s->sysv_start_priority < 0)
644 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", u->meta.id);
645 }
646
647 if ((r = sysv_exec_commands(s)) < 0)
648 goto finish;
649
650 if (!s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels)) {
651 /* If there a runlevels configured for this service
652 * but none of the standard ones, then we assume this
653 * is some special kind of service (which might be
654 * needed for early boot) and don't create any links
655 * to it. */
656
657 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0 ||
658 (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
659 goto finish;
660 }
661
662 /* Special setting for all SysV services */
663 s->valid_no_process = true;
664
665 /* Don't timeout special services during boot (like fsck) */
666 if (s->sysv_runlevels && !chars_intersect("12345", s->sysv_runlevels))
667 s->timeout_usec = -1;
668
669 u->meta.load_state = UNIT_LOADED;
670 r = 0;
671
672 finish:
673
674 if (f)
675 fclose(f);
676
677 return r;
678 }
679
680 static int service_load_sysv_name(Service *s, const char *name) {
681 char **p;
682
683 assert(s);
684 assert(name);
685
686 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
687 char *path;
688 int r;
689
690 if (asprintf(&path, "%s/%s", *p, name) < 0)
691 return -ENOMEM;
692
693 assert(endswith(path, ".service"));
694 path[strlen(path)-8] = 0;
695
696 r = service_load_sysv_path(s, path);
697 free(path);
698
699 if (r < 0)
700 return r;
701
702 if ((UNIT(s)->meta.load_state != UNIT_STUB))
703 break;
704 }
705
706 return 0;
707 }
708
709 static int service_load_sysv(Service *s) {
710 const char *t;
711 Iterator i;
712 int r;
713
714 assert(s);
715
716 /* Load service data from SysV init scripts, preferably with
717 * LSB headers ... */
718
719 if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
720 return 0;
721
722 if ((t = UNIT(s)->meta.id))
723 if ((r = service_load_sysv_name(s, t)) < 0)
724 return r;
725
726 if (UNIT(s)->meta.load_state == UNIT_STUB)
727 SET_FOREACH(t, UNIT(s)->meta.names, i) {
728 if (t == UNIT(s)->meta.id)
729 continue;
730
731 if ((r == service_load_sysv_name(s, t)) < 0)
732 return r;
733
734 if (UNIT(s)->meta.load_state != UNIT_STUB)
735 break;
736 }
737
738 return 0;
739 }
740
741 static int service_add_bus_name(Service *s) {
742 char *n;
743 int r;
744
745 assert(s);
746 assert(s->bus_name);
747
748 if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
749 return 0;
750
751 r = unit_merge_by_name(UNIT(s), n);
752 free(n);
753
754 return r;
755 }
756
757 static int service_verify(Service *s) {
758 assert(s);
759
760 if (UNIT(s)->meta.load_state != UNIT_LOADED)
761 return 0;
762
763 if (!s->exec_command[SERVICE_EXEC_START]) {
764 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->meta.id);
765 return -EINVAL;
766 }
767
768 if (s->type == SERVICE_DBUS && !s->bus_name) {
769 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->meta.id);
770 return -EINVAL;
771 }
772
773 return 0;
774 }
775
776 static int service_load(Unit *u) {
777 int r;
778 Service *s = SERVICE(u);
779
780 assert(s);
781
782 /* Load a .service file */
783 if ((r = unit_load_fragment(u)) < 0)
784 return r;
785
786 /* Load a classic init script as a fallback, if we couldn't find anything */
787 if (u->meta.load_state == UNIT_STUB)
788 if ((r = service_load_sysv(s)) < 0)
789 return r;
790
791 /* Still nothing found? Then let's give up */
792 if (u->meta.load_state == UNIT_STUB)
793 return -ENOENT;
794
795 /* We were able to load something, then let's add in the
796 * dropin directories. */
797 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
798 return r;
799
800 /* This is a new unit? Then let's add in some extras */
801 if (u->meta.load_state == UNIT_LOADED) {
802 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
803 return r;
804
805 if ((r = unit_add_default_cgroup(u)) < 0)
806 return r;
807
808 if ((r = sysv_chkconfig_order(s)) < 0)
809 return r;
810
811 if (s->bus_name) {
812 if ((r = service_add_bus_name(s)) < 0)
813 return r;
814
815 if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
816 return r;
817 }
818 }
819
820 return service_verify(s);
821 }
822
823 static void service_dump(Unit *u, FILE *f, const char *prefix) {
824
825 ServiceExecCommand c;
826 Service *s = SERVICE(u);
827 const char *prefix2;
828 char *p2;
829
830 assert(s);
831
832 p2 = strappend(prefix, "\t");
833 prefix2 = p2 ? p2 : prefix;
834
835 fprintf(f,
836 "%sService State: %s\n"
837 "%sPermissionsStartOnly: %s\n"
838 "%sRootDirectoryStartOnly: %s\n"
839 "%sValidNoProcess: %s\n"
840 "%sKillMode: %s\n"
841 "%sType: %s\n",
842 prefix, service_state_to_string(s->state),
843 prefix, yes_no(s->permissions_start_only),
844 prefix, yes_no(s->root_directory_start_only),
845 prefix, yes_no(s->valid_no_process),
846 prefix, kill_mode_to_string(s->kill_mode),
847 prefix, service_type_to_string(s->type));
848
849 if (s->control_pid > 0)
850 fprintf(f,
851 "%sControl PID: %llu\n",
852 prefix, (unsigned long long) s->control_pid);
853
854 if (s->main_pid > 0)
855 fprintf(f,
856 "%sMain PID: %llu\n",
857 prefix, (unsigned long long) s->main_pid);
858
859 if (s->pid_file)
860 fprintf(f,
861 "%sPIDFile: %s\n",
862 prefix, s->pid_file);
863
864 if (s->bus_name)
865 fprintf(f,
866 "%sBusName: %s\n"
867 "%sBus Name Good: %s\n",
868 prefix, s->bus_name,
869 prefix, yes_no(s->bus_name_good));
870
871 exec_context_dump(&s->exec_context, f, prefix);
872
873 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
874
875 if (!s->exec_command[c])
876 continue;
877
878 fprintf(f, "%s-> %s:\n",
879 prefix, service_exec_command_to_string(c));
880
881 exec_command_dump_list(s->exec_command[c], f, prefix2);
882 }
883
884 if (s->sysv_path)
885 fprintf(f,
886 "%sSysV Init Script Path: %s\n"
887 "%sSysV Init Script has LSB Header: %s\n",
888 prefix, s->sysv_path,
889 prefix, yes_no(s->sysv_has_lsb));
890
891 if (s->sysv_start_priority >= 0)
892 fprintf(f,
893 "%sSysVStartPriority: %i\n",
894 prefix, s->sysv_start_priority);
895
896 if (s->sysv_runlevels)
897 fprintf(f, "%sSysVRunLevels: %s\n",
898 prefix, s->sysv_runlevels);
899
900 free(p2);
901 }
902
903 static int service_load_pid_file(Service *s) {
904 char *k;
905 unsigned long p;
906 int r;
907
908 assert(s);
909
910 if (s->main_pid_known)
911 return 0;
912
913 assert(s->main_pid <= 0);
914
915 if (!s->pid_file)
916 return -ENOENT;
917
918 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
919 return r;
920
921 if ((r = safe_atolu(k, &p)) < 0) {
922 free(k);
923 return r;
924 }
925
926 if ((unsigned long) (pid_t) p != p)
927 return -ERANGE;
928
929 if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
930 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
931 (unsigned long long) p, s->pid_file);
932 return -ESRCH;
933 }
934
935 if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
936 /* FIXME: we need to do something here */
937 return r;
938
939 s->main_pid = (pid_t) p;
940 s->main_pid_known = true;
941
942 return 0;
943 }
944
945 static int service_get_sockets(Service *s, Set **_set) {
946 Set *set;
947 Iterator i;
948 char *t;
949 int r;
950
951 assert(s);
952 assert(_set);
953
954 /* Collects all Socket objects that belong to this
955 * service. Note that a service might have multiple sockets
956 * via multiple names. */
957
958 if (!(set = set_new(NULL, NULL)))
959 return -ENOMEM;
960
961 SET_FOREACH(t, UNIT(s)->meta.names, i) {
962 char *k;
963 Unit *p;
964
965 /* Look for all socket objects that go by any of our
966 * units and collect their fds */
967
968 if (!(k = unit_name_change_suffix(t, ".socket"))) {
969 r = -ENOMEM;
970 goto fail;
971 }
972
973 p = manager_get_unit(UNIT(s)->meta.manager, k);
974 free(k);
975
976 if (!p)
977 continue;
978
979 if ((r = set_put(set, p)) < 0)
980 goto fail;
981 }
982
983 *_set = set;
984 return 0;
985
986 fail:
987 set_free(set);
988 return r;
989 }
990
991 static int service_notify_sockets_dead(Service *s) {
992 Iterator i;
993 Set *set;
994 Socket *sock;
995 int r;
996
997 assert(s);
998
999 /* Notifies all our sockets when we die */
1000 if ((r = service_get_sockets(s, &set)) < 0)
1001 return r;
1002
1003 SET_FOREACH(sock, set, i)
1004 socket_notify_service_dead(sock);
1005
1006 set_free(set);
1007
1008 return 0;
1009 }
1010
1011 static void service_set_state(Service *s, ServiceState state) {
1012 ServiceState old_state;
1013 assert(s);
1014
1015 old_state = s->state;
1016 s->state = state;
1017
1018 if (state != SERVICE_START_PRE &&
1019 state != SERVICE_START &&
1020 state != SERVICE_START_POST &&
1021 state != SERVICE_RELOAD &&
1022 state != SERVICE_STOP &&
1023 state != SERVICE_STOP_SIGTERM &&
1024 state != SERVICE_STOP_SIGKILL &&
1025 state != SERVICE_STOP_POST &&
1026 state != SERVICE_FINAL_SIGTERM &&
1027 state != SERVICE_FINAL_SIGKILL &&
1028 state != SERVICE_AUTO_RESTART)
1029 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1030
1031 if (state != SERVICE_START &&
1032 state != SERVICE_START_POST &&
1033 state != SERVICE_RUNNING &&
1034 state != SERVICE_RELOAD &&
1035 state != SERVICE_STOP &&
1036 state != SERVICE_STOP_SIGTERM &&
1037 state != SERVICE_STOP_SIGKILL)
1038 service_unwatch_main_pid(s);
1039
1040 if (state != SERVICE_START_PRE &&
1041 state != SERVICE_START &&
1042 state != SERVICE_START_POST &&
1043 state != SERVICE_RELOAD &&
1044 state != SERVICE_STOP &&
1045 state != SERVICE_STOP_SIGTERM &&
1046 state != SERVICE_STOP_SIGKILL &&
1047 state != SERVICE_STOP_POST &&
1048 state != SERVICE_FINAL_SIGTERM &&
1049 state != SERVICE_FINAL_SIGKILL) {
1050 service_unwatch_control_pid(s);
1051 s->control_command = NULL;
1052 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1053 }
1054
1055 if (state == SERVICE_DEAD ||
1056 state == SERVICE_STOP ||
1057 state == SERVICE_STOP_SIGTERM ||
1058 state == SERVICE_STOP_SIGKILL ||
1059 state == SERVICE_STOP_POST ||
1060 state == SERVICE_FINAL_SIGTERM ||
1061 state == SERVICE_FINAL_SIGKILL ||
1062 state == SERVICE_MAINTAINANCE ||
1063 state == SERVICE_AUTO_RESTART)
1064 service_notify_sockets_dead(s);
1065
1066 if (state != SERVICE_START_PRE &&
1067 state != SERVICE_START &&
1068 !(state == SERVICE_DEAD && UNIT(s)->meta.job))
1069 service_close_socket_fd(s);
1070
1071 if (old_state != state)
1072 log_debug("%s changed %s -> %s", UNIT(s)->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1073
1074 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1075 }
1076
1077 static int service_coldplug(Unit *u) {
1078 Service *s = SERVICE(u);
1079 int r;
1080
1081 assert(s);
1082 assert(s->state == SERVICE_DEAD);
1083
1084 if (s->deserialized_state != s->state) {
1085
1086 if (s->deserialized_state == SERVICE_START_PRE ||
1087 s->deserialized_state == SERVICE_START ||
1088 s->deserialized_state == SERVICE_START_POST ||
1089 s->deserialized_state == SERVICE_RELOAD ||
1090 s->deserialized_state == SERVICE_STOP ||
1091 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1092 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1093 s->deserialized_state == SERVICE_STOP_POST ||
1094 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1095 s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1096 s->deserialized_state == SERVICE_AUTO_RESTART) {
1097
1098 if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1099 usec_t k;
1100
1101 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1102
1103 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1104 return r;
1105 }
1106 }
1107
1108 if ((s->deserialized_state == SERVICE_START &&
1109 (s->type == SERVICE_FORKING ||
1110 s->type == SERVICE_DBUS)) ||
1111 s->deserialized_state == SERVICE_START_POST ||
1112 s->deserialized_state == SERVICE_RUNNING ||
1113 s->deserialized_state == SERVICE_RELOAD ||
1114 s->deserialized_state == SERVICE_STOP ||
1115 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1116 s->deserialized_state == SERVICE_STOP_SIGKILL)
1117 if (s->main_pid > 0)
1118 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1119 return r;
1120
1121 if (s->deserialized_state == SERVICE_START_PRE ||
1122 s->deserialized_state == SERVICE_START ||
1123 s->deserialized_state == SERVICE_START_POST ||
1124 s->deserialized_state == SERVICE_RELOAD ||
1125 s->deserialized_state == SERVICE_STOP ||
1126 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1127 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1128 s->deserialized_state == SERVICE_STOP_POST ||
1129 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1130 s->deserialized_state == SERVICE_FINAL_SIGKILL)
1131 if (s->control_pid > 0)
1132 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1133 return r;
1134
1135 service_set_state(s, s->deserialized_state);
1136 }
1137
1138 return 0;
1139 }
1140
1141 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1142 Iterator i;
1143 int r;
1144 int *rfds = NULL;
1145 unsigned rn_fds = 0;
1146 Set *set;
1147 Socket *sock;
1148
1149 assert(s);
1150 assert(fds);
1151 assert(n_fds);
1152
1153 if ((r = service_get_sockets(s, &set)) < 0)
1154 return r;
1155
1156 SET_FOREACH(sock, set, i) {
1157 int *cfds;
1158 unsigned cn_fds;
1159
1160 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1161 goto fail;
1162
1163 if (!cfds)
1164 continue;
1165
1166 if (!rfds) {
1167 rfds = cfds;
1168 rn_fds = cn_fds;
1169 } else {
1170 int *t;
1171
1172 if (!(t = new(int, rn_fds+cn_fds))) {
1173 free(cfds);
1174 r = -ENOMEM;
1175 goto fail;
1176 }
1177
1178 memcpy(t, rfds, rn_fds);
1179 memcpy(t+rn_fds, cfds, cn_fds);
1180 free(rfds);
1181 free(cfds);
1182
1183 rfds = t;
1184 rn_fds = rn_fds+cn_fds;
1185 }
1186 }
1187
1188 *fds = rfds;
1189 *n_fds = rn_fds;
1190
1191 set_free(set);
1192
1193 return 0;
1194
1195 fail:
1196 set_free(set);
1197 free(rfds);
1198
1199 return r;
1200 }
1201
1202 static int service_spawn(
1203 Service *s,
1204 ExecCommand *c,
1205 bool timeout,
1206 bool pass_fds,
1207 bool apply_permissions,
1208 bool apply_chroot,
1209 pid_t *_pid) {
1210
1211 pid_t pid;
1212 int r;
1213 int *fds = NULL;
1214 unsigned n_fds = 0;
1215 char **argv;
1216
1217 assert(s);
1218 assert(c);
1219 assert(_pid);
1220
1221 if (pass_fds) {
1222 if (s->socket_fd >= 0) {
1223 fds = &s->socket_fd;
1224 n_fds = 1;
1225 } else if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1226 goto fail;
1227 }
1228
1229 if (timeout && s->timeout_usec) {
1230 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1231 goto fail;
1232 } else
1233 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1234
1235 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1236 r = -ENOMEM;
1237 goto fail;
1238 }
1239
1240 r = exec_spawn(c,
1241 argv,
1242 &s->exec_context,
1243 fds, n_fds,
1244 apply_permissions,
1245 apply_chroot,
1246 UNIT(s)->meta.manager->confirm_spawn,
1247 UNIT(s)->meta.cgroup_bondings,
1248 &pid);
1249
1250 strv_free(argv);
1251 if (r < 0)
1252 goto fail;
1253
1254 if (fds) {
1255 if (s->socket_fd >= 0)
1256 service_close_socket_fd(s);
1257 else
1258 free(fds);
1259 }
1260
1261 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1262 /* FIXME: we need to do something here */
1263 goto fail;
1264
1265 *_pid = pid;
1266
1267 return 0;
1268
1269 fail:
1270 free(fds);
1271
1272 if (timeout)
1273 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1274
1275 return r;
1276 }
1277
1278 static int main_pid_good(Service *s) {
1279 assert(s);
1280
1281 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1282 * don't know */
1283
1284 /* If we know the pid file, then lets just check if it is
1285 * still valid */
1286 if (s->main_pid_known)
1287 return s->main_pid > 0;
1288
1289 /* We don't know the pid */
1290 return -EAGAIN;
1291 }
1292
1293 static int control_pid_good(Service *s) {
1294 assert(s);
1295
1296 return s->control_pid > 0;
1297 }
1298
1299 static int cgroup_good(Service *s) {
1300 int r;
1301
1302 assert(s);
1303
1304 if (s->valid_no_process)
1305 return -EAGAIN;
1306
1307 if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1308 return r;
1309
1310 return !r;
1311 }
1312
1313 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1314 int r;
1315 assert(s);
1316
1317 if (!success)
1318 s->failure = true;
1319
1320 if (allow_restart &&
1321 (s->restart == SERVICE_RESTART_ALWAYS ||
1322 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1323
1324 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1325 goto fail;
1326
1327 service_set_state(s, SERVICE_AUTO_RESTART);
1328 } else
1329 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1330
1331 return;
1332
1333 fail:
1334 log_warning("%s failed to run install restart timer: %s", UNIT(s)->meta.id, strerror(-r));
1335 service_enter_dead(s, false, false);
1336 }
1337
1338 static void service_enter_signal(Service *s, ServiceState state, bool success);
1339
1340 static void service_enter_stop_post(Service *s, bool success) {
1341 int r;
1342 assert(s);
1343
1344 if (!success)
1345 s->failure = true;
1346
1347 service_unwatch_control_pid(s);
1348
1349 s->control_command_id = SERVICE_EXEC_STOP_POST;
1350 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1351 if ((r = service_spawn(s,
1352 s->control_command,
1353 true,
1354 false,
1355 !s->permissions_start_only,
1356 !s->root_directory_start_only,
1357 &s->control_pid)) < 0)
1358 goto fail;
1359
1360
1361 service_set_state(s, SERVICE_STOP_POST);
1362 } else
1363 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1364
1365 return;
1366
1367 fail:
1368 log_warning("%s failed to run stop-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1369 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1370 }
1371
1372 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1373 int r;
1374 bool sent = false;
1375
1376 assert(s);
1377
1378 if (!success)
1379 s->failure = true;
1380
1381 if (s->kill_mode != KILL_NONE) {
1382 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1383
1384 if (s->kill_mode == KILL_CONTROL_GROUP) {
1385
1386 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1387 if (r != -EAGAIN && r != -ESRCH)
1388 goto fail;
1389 } else
1390 sent = true;
1391 }
1392
1393 if (!sent) {
1394 r = 0;
1395
1396 if (s->main_pid > 0) {
1397 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1398 r = -errno;
1399 else
1400 sent = true;
1401 }
1402
1403 if (s->control_pid > 0) {
1404 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1405 r = -errno;
1406 else
1407 sent = true;
1408 }
1409
1410 if (r < 0)
1411 goto fail;
1412 }
1413 }
1414
1415 if (sent) {
1416 if (s->timeout_usec > 0)
1417 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1418 goto fail;
1419
1420 service_set_state(s, state);
1421 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1422 service_enter_stop_post(s, true);
1423 else
1424 service_enter_dead(s, true, true);
1425
1426 return;
1427
1428 fail:
1429 log_warning("%s failed to kill processes: %s", UNIT(s)->meta.id, strerror(-r));
1430
1431 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1432 service_enter_stop_post(s, false);
1433 else
1434 service_enter_dead(s, false, true);
1435 }
1436
1437 static void service_enter_stop(Service *s, bool success) {
1438 int r;
1439 assert(s);
1440
1441 if (!success)
1442 s->failure = true;
1443
1444 service_unwatch_control_pid(s);
1445
1446 s->control_command_id = SERVICE_EXEC_STOP;
1447 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1448 if ((r = service_spawn(s,
1449 s->control_command,
1450 true,
1451 false,
1452 !s->permissions_start_only,
1453 !s->root_directory_start_only,
1454 &s->control_pid)) < 0)
1455 goto fail;
1456
1457 service_set_state(s, SERVICE_STOP);
1458 } else
1459 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1460
1461 return;
1462
1463 fail:
1464 log_warning("%s failed to run stop executable: %s", UNIT(s)->meta.id, strerror(-r));
1465 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1466 }
1467
1468 static void service_enter_running(Service *s, bool success) {
1469 assert(s);
1470
1471 if (!success)
1472 s->failure = true;
1473
1474 if (main_pid_good(s) != 0 &&
1475 cgroup_good(s) != 0 &&
1476 (s->bus_name_good || s->type != SERVICE_DBUS))
1477 service_set_state(s, SERVICE_RUNNING);
1478 else if (s->valid_no_process)
1479 service_set_state(s, SERVICE_EXITED);
1480 else
1481 service_enter_stop(s, true);
1482 }
1483
1484 static void service_enter_start_post(Service *s) {
1485 int r;
1486 assert(s);
1487
1488 service_unwatch_control_pid(s);
1489
1490 s->control_command_id = SERVICE_EXEC_START_POST;
1491 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1492 if ((r = service_spawn(s,
1493 s->control_command,
1494 true,
1495 false,
1496 !s->permissions_start_only,
1497 !s->root_directory_start_only,
1498 &s->control_pid)) < 0)
1499 goto fail;
1500
1501
1502 service_set_state(s, SERVICE_START_POST);
1503 } else
1504 service_enter_running(s, true);
1505
1506 return;
1507
1508 fail:
1509 log_warning("%s failed to run start-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1510 service_enter_stop(s, false);
1511 }
1512
1513 static void service_enter_start(Service *s) {
1514 pid_t pid;
1515 int r;
1516
1517 assert(s);
1518
1519 assert(s->exec_command[SERVICE_EXEC_START]);
1520 assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1521
1522 if (s->type == SERVICE_FORKING)
1523 service_unwatch_control_pid(s);
1524 else
1525 service_unwatch_main_pid(s);
1526
1527 if ((r = service_spawn(s,
1528 s->exec_command[SERVICE_EXEC_START],
1529 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS,
1530 true,
1531 true,
1532 true,
1533 &pid)) < 0)
1534 goto fail;
1535
1536 if (s->type == SERVICE_SIMPLE) {
1537 /* For simple services we immediately start
1538 * the START_POST binaries. */
1539
1540 s->main_pid = pid;
1541 s->main_pid_known = true;
1542
1543 service_enter_start_post(s);
1544
1545 } else if (s->type == SERVICE_FORKING) {
1546
1547 /* For forking services we wait until the start
1548 * process exited. */
1549
1550 s->control_pid = pid;
1551
1552 s->control_command_id = SERVICE_EXEC_START;
1553 s->control_command = s->exec_command[SERVICE_EXEC_START];
1554 service_set_state(s, SERVICE_START);
1555
1556 } else if (s->type == SERVICE_FINISH ||
1557 s->type == SERVICE_DBUS) {
1558
1559 /* For finishing services we wait until the start
1560 * process exited, too, but it is our main process. */
1561
1562 /* For D-Bus services we know the main pid right away,
1563 * but wait for the bus name to appear on the bus. */
1564
1565 s->main_pid = pid;
1566 s->main_pid_known = true;
1567
1568 service_set_state(s, SERVICE_START);
1569 } else
1570 assert_not_reached("Unknown service type");
1571
1572 return;
1573
1574 fail:
1575 log_warning("%s failed to run start exectuable: %s", UNIT(s)->meta.id, strerror(-r));
1576 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1577 }
1578
1579 static void service_enter_start_pre(Service *s) {
1580 int r;
1581
1582 assert(s);
1583
1584 service_unwatch_control_pid(s);
1585
1586 s->control_command_id = SERVICE_EXEC_START_PRE;
1587 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1588 if ((r = service_spawn(s,
1589 s->control_command,
1590 true,
1591 false,
1592 !s->permissions_start_only,
1593 !s->root_directory_start_only,
1594 &s->control_pid)) < 0)
1595 goto fail;
1596
1597 service_set_state(s, SERVICE_START_PRE);
1598 } else
1599 service_enter_start(s);
1600
1601 return;
1602
1603 fail:
1604 log_warning("%s failed to run start-pre executable: %s", UNIT(s)->meta.id, strerror(-r));
1605 service_enter_dead(s, false, true);
1606 }
1607
1608 static void service_enter_restart(Service *s) {
1609 int r;
1610 assert(s);
1611
1612 service_enter_dead(s, true, false);
1613
1614 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1615 goto fail;
1616
1617 log_debug("%s scheduled restart job.", UNIT(s)->meta.id);
1618 return;
1619
1620 fail:
1621
1622 log_warning("%s failed to schedule restart job: %s", UNIT(s)->meta.id, strerror(-r));
1623 service_enter_dead(s, false, false);
1624 }
1625
1626 static void service_enter_reload(Service *s) {
1627 int r;
1628
1629 assert(s);
1630
1631 service_unwatch_control_pid(s);
1632
1633 s->control_command_id = SERVICE_EXEC_RELOAD;
1634 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1635 if ((r = service_spawn(s,
1636 s->control_command,
1637 true,
1638 false,
1639 !s->permissions_start_only,
1640 !s->root_directory_start_only,
1641 &s->control_pid)) < 0)
1642 goto fail;
1643
1644 service_set_state(s, SERVICE_RELOAD);
1645 } else
1646 service_enter_running(s, true);
1647
1648 return;
1649
1650 fail:
1651 log_warning("%s failed to run reload executable: %s", UNIT(s)->meta.id, strerror(-r));
1652 service_enter_stop(s, false);
1653 }
1654
1655 static void service_run_next(Service *s, bool success) {
1656 int r;
1657
1658 assert(s);
1659 assert(s->control_command);
1660 assert(s->control_command->command_next);
1661
1662 if (!success)
1663 s->failure = true;
1664
1665 s->control_command = s->control_command->command_next;
1666
1667 service_unwatch_control_pid(s);
1668
1669 if ((r = service_spawn(s,
1670 s->control_command,
1671 true,
1672 false,
1673 !s->permissions_start_only,
1674 !s->root_directory_start_only,
1675 &s->control_pid)) < 0)
1676 goto fail;
1677
1678 return;
1679
1680 fail:
1681 log_warning("%s failed to run spawn next executable: %s", UNIT(s)->meta.id, strerror(-r));
1682
1683 if (s->state == SERVICE_START_PRE)
1684 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1685 else if (s->state == SERVICE_STOP)
1686 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1687 else if (s->state == SERVICE_STOP_POST)
1688 service_enter_dead(s, false, true);
1689 else
1690 service_enter_stop(s, false);
1691 }
1692
1693 static int service_start(Unit *u) {
1694 Service *s = SERVICE(u);
1695
1696 assert(s);
1697
1698 /* We cannot fulfill this request right now, try again later
1699 * please! */
1700 if (s->state == SERVICE_STOP ||
1701 s->state == SERVICE_STOP_SIGTERM ||
1702 s->state == SERVICE_STOP_SIGKILL ||
1703 s->state == SERVICE_STOP_POST ||
1704 s->state == SERVICE_FINAL_SIGTERM ||
1705 s->state == SERVICE_FINAL_SIGKILL)
1706 return -EAGAIN;
1707
1708 /* Already on it! */
1709 if (s->state == SERVICE_START_PRE ||
1710 s->state == SERVICE_START ||
1711 s->state == SERVICE_START_POST)
1712 return 0;
1713
1714 assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1715
1716 /* Make sure we don't enter a busy loop of some kind. */
1717 if (!ratelimit_test(&s->ratelimit)) {
1718 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1719 return -EAGAIN;
1720 }
1721
1722 s->failure = false;
1723 s->main_pid_known = false;
1724
1725 service_enter_start_pre(s);
1726 return 0;
1727 }
1728
1729 static int service_stop(Unit *u) {
1730 Service *s = SERVICE(u);
1731
1732 assert(s);
1733
1734 /* Cannot do this now */
1735 if (s->state == SERVICE_START_PRE ||
1736 s->state == SERVICE_START ||
1737 s->state == SERVICE_START_POST ||
1738 s->state == SERVICE_RELOAD)
1739 return -EAGAIN;
1740
1741 /* Already on it */
1742 if (s->state == SERVICE_STOP ||
1743 s->state == SERVICE_STOP_SIGTERM ||
1744 s->state == SERVICE_STOP_SIGKILL ||
1745 s->state == SERVICE_STOP_POST ||
1746 s->state == SERVICE_FINAL_SIGTERM ||
1747 s->state == SERVICE_FINAL_SIGKILL)
1748 return 0;
1749
1750 if (s->state == SERVICE_AUTO_RESTART) {
1751 service_set_state(s, SERVICE_DEAD);
1752 return 0;
1753 }
1754
1755 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1756
1757 service_enter_stop(s, true);
1758 return 0;
1759 }
1760
1761 static int service_reload(Unit *u) {
1762 Service *s = SERVICE(u);
1763
1764 assert(s);
1765
1766 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1767
1768 service_enter_reload(s);
1769 return 0;
1770 }
1771
1772 static bool service_can_reload(Unit *u) {
1773 Service *s = SERVICE(u);
1774
1775 assert(s);
1776
1777 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1778 }
1779
1780 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1781 Service *s = SERVICE(u);
1782
1783 assert(u);
1784 assert(f);
1785 assert(fds);
1786
1787 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1788 unit_serialize_item(u, f, "failure", yes_no(s->failure));
1789
1790 if (s->control_pid > 0)
1791 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) (s->control_pid));
1792
1793 if (s->main_pid > 0)
1794 unit_serialize_item_format(u, f, "main-pid", "%u", (unsigned) (s->main_pid));
1795
1796 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1797
1798 /* There's a minor uncleanliness here: if there are multiple
1799 * commands attached here, we will start from the first one
1800 * again */
1801 if (s->control_command_id >= 0)
1802 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(s->control_command_id));
1803
1804 if (s->socket_fd >= 0) {
1805 int copy;
1806
1807 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1808 return copy;
1809
1810 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1811 }
1812
1813 return 0;
1814 }
1815
1816 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1817 Service *s = SERVICE(u);
1818 int r;
1819
1820 assert(u);
1821 assert(key);
1822 assert(value);
1823 assert(fds);
1824
1825 if (streq(key, "state")) {
1826 ServiceState state;
1827
1828 if ((state = service_state_from_string(value)) < 0)
1829 log_debug("Failed to parse state value %s", value);
1830 else
1831 s->deserialized_state = state;
1832 } else if (streq(key, "failure")) {
1833 int b;
1834
1835 if ((b = parse_boolean(value)) < 0)
1836 log_debug("Failed to parse failure value %s", value);
1837 else
1838 s->failure = b || s->failure;
1839 } else if (streq(key, "control-pid")) {
1840 unsigned pid;
1841
1842 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1843 log_debug("Failed to parse control-pid value %s", value);
1844 else
1845 s->control_pid = (pid_t) pid;
1846 } else if (streq(key, "main-pid")) {
1847 unsigned pid;
1848
1849 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1850 log_debug("Failed to parse main-pid value %s", value);
1851 else
1852 s->main_pid = (pid_t) pid;
1853 } else if (streq(key, "main-pid-known")) {
1854 int b;
1855
1856 if ((b = parse_boolean(value)) < 0)
1857 log_debug("Failed to parse main-pid-known value %s", value);
1858 else
1859 s->main_pid_known = b;
1860 } else if (streq(key, "control-command")) {
1861 ServiceExecCommand id;
1862
1863 if ((id = service_exec_command_from_string(value)) < 0)
1864 log_debug("Failed to parse exec-command value %s", value);
1865 else {
1866 s->control_command_id = id;
1867 s->control_command = s->exec_command[id];
1868 }
1869 } else if (streq(key, "socket-fd")) {
1870 int fd;
1871
1872 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1873 log_debug("Failed to parse socket-fd value %s", value);
1874 else {
1875
1876 if (s->socket_fd >= 0)
1877 close_nointr_nofail(s->socket_fd);
1878 s->socket_fd = fdset_remove(fds, fd);
1879 }
1880 } else
1881 log_debug("Unknown serialization key '%s'", key);
1882
1883 return 0;
1884 }
1885
1886 static UnitActiveState service_active_state(Unit *u) {
1887 assert(u);
1888
1889 return state_translation_table[SERVICE(u)->state];
1890 }
1891
1892 static const char *service_sub_state_to_string(Unit *u) {
1893 assert(u);
1894
1895 return service_state_to_string(SERVICE(u)->state);
1896 }
1897
1898 static bool service_check_gc(Unit *u) {
1899 Service *s = SERVICE(u);
1900
1901 assert(s);
1902
1903 return !!s->sysv_path;
1904 }
1905
1906 static bool service_check_snapshot(Unit *u) {
1907 Service *s = SERVICE(u);
1908
1909 assert(s);
1910
1911 return !s->got_socket_fd;
1912 }
1913
1914 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1915 Service *s = SERVICE(u);
1916 bool success;
1917
1918 assert(s);
1919 assert(pid >= 0);
1920
1921 success = code == CLD_EXITED && status == 0;
1922 s->failure = s->failure || !success;
1923
1924 if (s->main_pid == pid) {
1925
1926 exec_status_fill(&s->main_exec_status, pid, code, status);
1927 s->main_pid = 0;
1928
1929 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1930 assert(s->exec_command[SERVICE_EXEC_START]);
1931 s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1932 }
1933
1934 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
1935
1936 /* The service exited, so the service is officially
1937 * gone. */
1938
1939 switch (s->state) {
1940
1941 case SERVICE_START_POST:
1942 case SERVICE_RELOAD:
1943 case SERVICE_STOP:
1944 /* Need to wait until the operation is
1945 * done */
1946 break;
1947
1948 case SERVICE_START:
1949 assert(s->type == SERVICE_FINISH);
1950
1951 /* This was our main goal, so let's go on */
1952 if (success)
1953 service_enter_start_post(s);
1954 else
1955 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1956 break;
1957
1958 case SERVICE_RUNNING:
1959 service_enter_running(s, success);
1960 break;
1961
1962 case SERVICE_STOP_SIGTERM:
1963 case SERVICE_STOP_SIGKILL:
1964
1965 if (!control_pid_good(s))
1966 service_enter_stop_post(s, success);
1967
1968 /* If there is still a control process, wait for that first */
1969 break;
1970
1971 default:
1972 assert_not_reached("Uh, main process died at wrong time.");
1973 }
1974
1975 } else if (s->control_pid == pid) {
1976
1977 if (s->control_command)
1978 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1979
1980 s->control_pid = 0;
1981
1982 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1983
1984 /* If we are shutting things down anyway we
1985 * don't care about failing commands. */
1986
1987 if (s->control_command && s->control_command->command_next && success) {
1988
1989 /* There is another command to *
1990 * execute, so let's do that. */
1991
1992 log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
1993 service_run_next(s, success);
1994
1995 } else {
1996 /* No further commands for this step, so let's
1997 * figure out what to do next */
1998
1999 s->control_command = NULL;
2000 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2001
2002 log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2003
2004 switch (s->state) {
2005
2006 case SERVICE_START_PRE:
2007 if (success)
2008 service_enter_start(s);
2009 else
2010 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2011 break;
2012
2013 case SERVICE_START:
2014 assert(s->type == SERVICE_FORKING);
2015
2016 /* Let's try to load the pid
2017 * file here if we can. We
2018 * ignore the return value,
2019 * since the PID file might
2020 * actually be created by a
2021 * START_POST script */
2022
2023 if (success) {
2024 if (s->pid_file)
2025 service_load_pid_file(s);
2026
2027 service_enter_start_post(s);
2028 } else
2029 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2030
2031 break;
2032
2033 case SERVICE_START_POST:
2034 if (success && s->pid_file && !s->main_pid_known) {
2035 int r;
2036
2037 /* Hmm, let's see if we can
2038 * load the pid now after the
2039 * start-post scripts got
2040 * executed. */
2041
2042 if ((r = service_load_pid_file(s)) < 0)
2043 log_warning("%s: failed to load PID file %s: %s", UNIT(s)->meta.id, s->pid_file, strerror(-r));
2044 }
2045
2046 /* Fall through */
2047
2048 case SERVICE_RELOAD:
2049 if (success)
2050 service_enter_running(s, true);
2051 else
2052 service_enter_stop(s, false);
2053
2054 break;
2055
2056 case SERVICE_STOP:
2057 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2058 break;
2059
2060 case SERVICE_STOP_SIGTERM:
2061 case SERVICE_STOP_SIGKILL:
2062 if (main_pid_good(s) <= 0)
2063 service_enter_stop_post(s, success);
2064
2065 /* If there is still a service
2066 * process around, wait until
2067 * that one quit, too */
2068 break;
2069
2070 case SERVICE_STOP_POST:
2071 case SERVICE_FINAL_SIGTERM:
2072 case SERVICE_FINAL_SIGKILL:
2073 service_enter_dead(s, success, true);
2074 break;
2075
2076 default:
2077 assert_not_reached("Uh, control process died at wrong time.");
2078 }
2079 }
2080 } else
2081 assert_not_reached("Got SIGCHLD for unkown PID");
2082 }
2083
2084 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2085 Service *s = SERVICE(u);
2086
2087 assert(s);
2088 assert(elapsed == 1);
2089
2090 assert(w == &s->timer_watch);
2091
2092 switch (s->state) {
2093
2094 case SERVICE_START_PRE:
2095 case SERVICE_START:
2096 log_warning("%s operation timed out. Terminating.", u->meta.id);
2097 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2098 break;
2099
2100 case SERVICE_START_POST:
2101 case SERVICE_RELOAD:
2102 log_warning("%s operation timed out. Stopping.", u->meta.id);
2103 service_enter_stop(s, false);
2104 break;
2105
2106 case SERVICE_STOP:
2107 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2108 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2109 break;
2110
2111 case SERVICE_STOP_SIGTERM:
2112 log_warning("%s stopping timed out. Killing.", u->meta.id);
2113 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2114 break;
2115
2116 case SERVICE_STOP_SIGKILL:
2117 /* Uh, wie sent a SIGKILL and it is still not gone?
2118 * Must be something we cannot kill, so let's just be
2119 * weirded out and continue */
2120
2121 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2122 service_enter_stop_post(s, false);
2123 break;
2124
2125 case SERVICE_STOP_POST:
2126 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2127 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2128 break;
2129
2130 case SERVICE_FINAL_SIGTERM:
2131 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2132 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2133 break;
2134
2135 case SERVICE_FINAL_SIGKILL:
2136 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
2137 service_enter_dead(s, false, true);
2138 break;
2139
2140 case SERVICE_AUTO_RESTART:
2141 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2142 service_enter_restart(s);
2143 break;
2144
2145 default:
2146 assert_not_reached("Timeout at wrong time.");
2147 }
2148 }
2149
2150 static void service_cgroup_notify_event(Unit *u) {
2151 Service *s = SERVICE(u);
2152
2153 assert(u);
2154
2155 log_debug("%s: cgroup is empty", u->meta.id);
2156
2157 switch (s->state) {
2158
2159 /* Waiting for SIGCHLD is usually more interesting,
2160 * because it includes return codes/signals. Which is
2161 * why we ignore the cgroup events for most cases,
2162 * except when we don't know pid which to expect the
2163 * SIGCHLD for. */
2164
2165 case SERVICE_RUNNING:
2166 service_enter_running(s, true);
2167 break;
2168
2169 default:
2170 ;
2171 }
2172 }
2173
2174 static int service_enumerate(Manager *m) {
2175 char **p;
2176 unsigned i;
2177 DIR *d = NULL;
2178 char *path = NULL, *fpath = NULL, *name = NULL;
2179 int r;
2180
2181 assert(m);
2182
2183 STRV_FOREACH(p, m->sysvrcnd_path)
2184 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
2185 struct dirent *de;
2186
2187 free(path);
2188 path = NULL;
2189 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
2190 r = -ENOMEM;
2191 goto finish;
2192 }
2193
2194 if (d)
2195 closedir(d);
2196
2197 if (!(d = opendir(path))) {
2198 if (errno != ENOENT)
2199 log_warning("opendir() failed on %s: %s", path, strerror(errno));
2200
2201 continue;
2202 }
2203
2204 while ((de = readdir(d))) {
2205 Unit *service;
2206
2207 if (ignore_file(de->d_name))
2208 continue;
2209
2210 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2211 continue;
2212
2213 if (strlen(de->d_name) < 4)
2214 continue;
2215
2216 free(fpath);
2217 fpath = NULL;
2218 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
2219 r = -ENOMEM;
2220 goto finish;
2221 }
2222
2223 if (access(fpath, X_OK) < 0) {
2224
2225 if (errno != ENOENT)
2226 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2227
2228 continue;
2229 }
2230
2231 free(name);
2232 name = NULL;
2233 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
2234 r = -ENOMEM;
2235 goto finish;
2236 }
2237
2238 if ((r = manager_load_unit(m, name, NULL, &service)) < 0)
2239 goto finish;
2240
2241 if (de->d_name[0] == 'S') {
2242 Unit *runlevel_target;
2243
2244 if ((r = manager_load_unit(m, rcnd_table[i+1], NULL, &runlevel_target)) < 0)
2245 goto finish;
2246
2247 if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
2248 goto finish;
2249
2250 if ((r = unit_add_dependency(runlevel_target, UNIT_AFTER, service, true)) < 0)
2251 goto finish;
2252
2253 } else if (de->d_name[0] == 'K' &&
2254 (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
2255 streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
2256
2257 Unit *shutdown_target;
2258
2259 /* We honour K links only for
2260 * halt/reboot. For the normal
2261 * runlevels we assume the
2262 * stop jobs will be
2263 * implicitly added by the
2264 * core logic. Also, we don't
2265 * really distuingish here
2266 * between the runlevels 0 and
2267 * 6 and just add them to the
2268 * special shutdown target. */
2269
2270 if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
2271 goto finish;
2272
2273 if ((r = unit_add_dependency(shutdown_target, UNIT_CONFLICTS, service, true)) < 0)
2274 goto finish;
2275
2276 if ((r = unit_add_dependency(shutdown_target, UNIT_BEFORE, service, true)) < 0)
2277 goto finish;
2278 }
2279 }
2280 }
2281
2282 r = 0;
2283
2284 finish:
2285 free(path);
2286 free(fpath);
2287 free(name);
2288 closedir(d);
2289
2290 return r;
2291 }
2292
2293 static void service_bus_name_owner_change(
2294 Unit *u,
2295 const char *name,
2296 const char *old_owner,
2297 const char *new_owner) {
2298
2299 Service *s = SERVICE(u);
2300
2301 assert(s);
2302 assert(name);
2303
2304 assert(streq(s->bus_name, name));
2305 assert(old_owner || new_owner);
2306
2307 if (old_owner && new_owner)
2308 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2309 else if (old_owner)
2310 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2311 else
2312 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2313
2314 s->bus_name_good = !!new_owner;
2315
2316 if (s->type == SERVICE_DBUS) {
2317
2318 /* service_enter_running() will figure out what to
2319 * do */
2320 if (s->state == SERVICE_RUNNING)
2321 service_enter_running(s, true);
2322 else if (s->state == SERVICE_START && new_owner)
2323 service_enter_start_post(s);
2324
2325 } else if (new_owner &&
2326 s->main_pid <= 0 &&
2327 (s->state == SERVICE_START ||
2328 s->state == SERVICE_START_POST ||
2329 s->state == SERVICE_RUNNING ||
2330 s->state == SERVICE_RELOAD)) {
2331
2332 /* Try to acquire PID from bus service */
2333 log_debug("Trying to acquire PID from D-Bus name...");
2334
2335 bus_query_pid(u->meta.manager, name);
2336 }
2337 }
2338
2339 static void service_bus_query_pid_done(
2340 Unit *u,
2341 const char *name,
2342 pid_t pid) {
2343
2344 Service *s = SERVICE(u);
2345
2346 assert(s);
2347 assert(name);
2348
2349 log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2350
2351 if (s->main_pid <= 0 &&
2352 (s->state == SERVICE_START ||
2353 s->state == SERVICE_START_POST ||
2354 s->state == SERVICE_RUNNING ||
2355 s->state == SERVICE_RELOAD))
2356 s->main_pid = pid;
2357 }
2358
2359 int service_set_socket_fd(Service *s, int fd) {
2360 assert(s);
2361 assert(fd >= 0);
2362
2363 /* This is called by the socket code when instantiating a new
2364 * service for a stream socket and the socket needs to be
2365 * configured. */
2366
2367 if (UNIT(s)->meta.load_state != UNIT_LOADED)
2368 return -EINVAL;
2369
2370 if (s->socket_fd >= 0)
2371 return -EBUSY;
2372
2373 if (s->state != SERVICE_DEAD)
2374 return -EAGAIN;
2375
2376 s->socket_fd = fd;
2377 s->got_socket_fd = true;
2378 return 0;
2379 }
2380
2381 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2382 [SERVICE_DEAD] = "dead",
2383 [SERVICE_START_PRE] = "start-pre",
2384 [SERVICE_START] = "start",
2385 [SERVICE_START_POST] = "start-post",
2386 [SERVICE_RUNNING] = "running",
2387 [SERVICE_EXITED] = "exited",
2388 [SERVICE_RELOAD] = "reload",
2389 [SERVICE_STOP] = "stop",
2390 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2391 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2392 [SERVICE_STOP_POST] = "stop-post",
2393 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2394 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2395 [SERVICE_MAINTAINANCE] = "maintainance",
2396 [SERVICE_AUTO_RESTART] = "auto-restart",
2397 };
2398
2399 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2400
2401 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2402 [SERVICE_ONCE] = "once",
2403 [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2404 [SERVICE_RESTART_ALWAYS] = "restart-always",
2405 };
2406
2407 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2408
2409 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2410 [SERVICE_FORKING] = "forking",
2411 [SERVICE_SIMPLE] = "simple",
2412 [SERVICE_FINISH] = "finish",
2413 [SERVICE_DBUS] = "dbus"
2414 };
2415
2416 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2417
2418 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2419 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2420 [SERVICE_EXEC_START] = "ExecStart",
2421 [SERVICE_EXEC_START_POST] = "ExecStartPost",
2422 [SERVICE_EXEC_RELOAD] = "ExecReload",
2423 [SERVICE_EXEC_STOP] = "ExecStop",
2424 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2425 };
2426
2427 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2428
2429 const UnitVTable service_vtable = {
2430 .suffix = ".service",
2431
2432 .init = service_init,
2433 .done = service_done,
2434 .load = service_load,
2435
2436 .coldplug = service_coldplug,
2437
2438 .dump = service_dump,
2439
2440 .start = service_start,
2441 .stop = service_stop,
2442 .reload = service_reload,
2443
2444 .can_reload = service_can_reload,
2445
2446 .serialize = service_serialize,
2447 .deserialize_item = service_deserialize_item,
2448
2449 .active_state = service_active_state,
2450 .sub_state_to_string = service_sub_state_to_string,
2451
2452 .check_gc = service_check_gc,
2453 .check_snapshot = service_check_snapshot,
2454
2455 .sigchld_event = service_sigchld_event,
2456 .timer_event = service_timer_event,
2457
2458 .cgroup_notify_empty = service_cgroup_notify_event,
2459
2460 .bus_name_owner_change = service_bus_name_owner_change,
2461 .bus_query_pid_done = service_bus_query_pid_done,
2462
2463 .bus_message_handler = bus_service_message_handler,
2464
2465 .enumerate = service_enumerate
2466 };
Michael's branch of systemd.