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