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