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