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macro: hookup assert logic with log logic
[thirdparty/systemd.git] / service.c
CommitLineData
5cb5a6ff
LP		 1/*-*- Mode: C; c-basic-offset: 8 -*-*/
2
a7334b09
LP		 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
5cb5a6ff 22#include <errno.h>
034c6ed7 23#include <signal.h>
2c4104f0
LP		 24#include <dirent.h>
25#include <unistd.h>
5cb5a6ff 26
87f0e418 27#include "unit.h"
5cb5a6ff
LP		 28#include "service.h"
29#include "load-fragment.h"
30#include "load-dropin.h"
034c6ed7 31#include "log.h"
2c4104f0
LP		 32#include "strv.h"
33
34#define COMMENTS "#;\n"
35#define NEWLINES "\n\r"
36#define LINE_MAX 4096
034c6ed7 37
23a177ef 38static const char * const rcnd_table[] = {
adcbe07c
LP		 39 "/rc0.d", SPECIAL_RUNLEVEL0_TARGET,
40 "/rc1.d", SPECIAL_RUNLEVEL1_TARGET,
41 "/rc2.d", SPECIAL_RUNLEVEL2_TARGET,
42 "/rc3.d", SPECIAL_RUNLEVEL3_TARGET,
43 "/rc4.d", SPECIAL_RUNLEVEL4_TARGET,
44 "/rc5.d", SPECIAL_RUNLEVEL5_TARGET,
45 "/rc6.d", SPECIAL_RUNLEVEL6_TARGET,
46 "/boot.d", SPECIAL_BASIC_TARGET
23a177ef
LP		 47};
48
acbb0225 49static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
87f0e418
LP		 50 [SERVICE_DEAD] = UNIT_INACTIVE,
51 [SERVICE_START_PRE] = UNIT_ACTIVATING,
52 [SERVICE_START] = UNIT_ACTIVATING,
53 [SERVICE_START_POST] = UNIT_ACTIVATING,
54 [SERVICE_RUNNING] = UNIT_ACTIVE,
80876c20 55 [SERVICE_EXITED] = UNIT_ACTIVE,
87f0e418
LP		 56 [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
57 [SERVICE_STOP] = UNIT_DEACTIVATING,
58 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
59 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
60 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
61 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
62 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
63 [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
64 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
034c6ed7 65};
5cb5a6ff 66
5e94833f
LP		 67static void service_unwatch_control_pid(Service *s) {
68 assert(s);
69
70 if (s->control_pid <= 0)
71 return;
72
73 unit_unwatch_pid(UNIT(s), s->control_pid);
74 s->control_pid = 0;
75}
76
77static void service_unwatch_main_pid(Service *s) {
78 assert(s);
79
80 if (s->main_pid <= 0)
81 return;
82
83 unit_unwatch_pid(UNIT(s), s->main_pid);
84 s->main_pid = 0;
85}
86
87f0e418
LP		 87static void service_done(Unit *u) {
88 Service *s = SERVICE(u);
44d8db9e
LP		 89
90 assert(s);
91
92 free(s->pid_file);
93 s->pid_file = NULL;
94
2c4104f0
LP		 95 free(s->sysv_path);
96 s->sysv_path = NULL;
97
8309400a
LP		 98 free(s->sysv_runlevels);
99 s->sysv_runlevels = NULL;
100
44d8db9e 101 exec_context_done(&s->exec_context);
e537352b 102 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
44d8db9e
LP		 103 s->control_command = NULL;
104
105 /* This will leak a process, but at least no memory or any of
106 * our resources */
5e94833f
LP		 107 service_unwatch_main_pid(s);
108 service_unwatch_control_pid(s);
44d8db9e 109
acbb0225 110 unit_unwatch_timer(u, &s->timer_watch);
44d8db9e
LP		 111}
112
2c4104f0
LP		 113static int sysv_translate_name(const char *name, char **_r) {
114
115 static const char * const table[] = {
116 "$local_fs", SPECIAL_LOCAL_FS_TARGET,
117 "$network", SPECIAL_NETWORK_TARGET,
118 "$named", SPECIAL_NSS_LOOKUP_TARGET,
119 "$portmap", SPECIAL_RPCBIND_TARGET,
120 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
121 "$syslog", SPECIAL_SYSLOG_TARGET,
122 "$time", SPECIAL_RTC_SET_TARGET
123 };
124
125 unsigned i;
126 char *r;
127
128 for (i = 0; i < ELEMENTSOF(table); i += 2)
129 if (streq(table[i], name)) {
130 if (!(r = strdup(table[i+1])))
131 return -ENOMEM;
132
133 goto finish;
134 }
135
136 if (*name == '$')
137 return 0;
138
139 if (asprintf(&r, "%s.service", name) < 0)
140 return -ENOMEM;
141
142finish:
143
144 if (_r)
145 *_r = r;
146
147 return 1;
148}
149
150static int sysv_chkconfig_order(Service *s) {
151 Meta *other;
152 int r;
153
154 assert(s);
155
156 if (s->sysv_start_priority < 0)
157 return 0;
158
23a177ef
LP		 159 /* For each pair of services where at least one lacks a LSB
160 * header, we use the start priority value to order things. */
2c4104f0
LP		 161
162 LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
163 Service *t;
164 UnitDependency d;
165
166 t = (Service*) other;
167
168 if (s == t)
169 continue;
170
171 if (t->sysv_start_priority < 0)
172 continue;
173
51a1a79d
LP		 174 /* If both units have modern headers we don't care
175 * about the priorities */
176 if ((!s->sysv_path || s->sysv_has_lsb) &&
177 (!t->sysv_path || t->sysv_has_lsb))
23a177ef
LP		 178 continue;
179
2c4104f0
LP		 180 if (t->sysv_start_priority < s->sysv_start_priority)
181 d = UNIT_AFTER;
182 else if (t->sysv_start_priority > s->sysv_start_priority)
183 d = UNIT_BEFORE;
184 else
185 continue;
186
187 /* FIXME: Maybe we should compare the name here lexicographically? */
188
189 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
190 return r;
191 }
192
193 return 0;
194}
195
196static ExecCommand *exec_command_new(const char *path, const char *arg1) {
197 ExecCommand *c;
198
199 if (!(c = new0(ExecCommand, 1)))
200 return NULL;
201
202 if (!(c->path = strdup(path))) {
203 free(c);
204 return NULL;
205 }
206
207 if (!(c->argv = strv_new(path, arg1, NULL))) {
208 free(c->path);
209 free(c);
210 return NULL;
211 }
212
213 return c;
214}
215
216static int sysv_exec_commands(Service *s) {
217 ExecCommand *c;
218
219 assert(s);
220 assert(s->sysv_path);
221
222 if (!(c = exec_command_new(s->sysv_path, "start")))
223 return -ENOMEM;
224 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
225
226 if (!(c = exec_command_new(s->sysv_path, "stop")))
227 return -ENOMEM;
228 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
229
230 if (!(c = exec_command_new(s->sysv_path, "reload")))
231 return -ENOMEM;
232 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
233
234 return 0;
235}
236
23a177ef
LP		 237static int priority_from_rcd(Service *s, const char *init_script) {
238 char **p;
239 unsigned i;
240
061978fa 241 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
23a177ef
LP		 242 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
243 char *path;
244 DIR *d;
245 struct dirent *de;
246
247 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
248 return -ENOMEM;
249
250 d = opendir(path);
251 free(path);
252
253 if (!d) {
254 if (errno != ENOENT)
255 log_warning("opendir() failed on %s: %s", path, strerror(errno));
256
257 continue;
258 }
259
260 while ((de = readdir(d))) {
261 int a, b;
262
263 if (ignore_file(de->d_name))
264 continue;
265
266 if (de->d_name[0] != 'S')
267 continue;
268
269 if (strlen(de->d_name) < 4)
270 continue;
271
272 if (!streq(de->d_name + 3, init_script))
273 continue;
274
275 /* Yay, we found it! Now decode the priority */
276
277 a = undecchar(de->d_name[1]);
278 b = undecchar(de->d_name[2]);
279
280 if (a < 0 || b < 0)
281 continue;
282
283 s->sysv_start_priority = a*10 + b;
284
285 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
286
287 closedir(d);
288 return 0;
289 }
290
291 closedir(d);
292 }
293
294 return 0;
295}
296
e537352b 297static int service_load_sysv_path(Service *s, const char *path) {
2c4104f0
LP		 298 FILE *f;
299 Unit *u;
300 unsigned line = 0;
301 int r;
302 enum {
303 NORMAL,
304 DESCRIPTION,
305 LSB,
306 LSB_DESCRIPTION
307 } state = NORMAL;
23a177ef
LP		 308
309 assert(s);
310 assert(path);
2c4104f0
LP		 311
312 u = UNIT(s);
313
314 if (!(f = fopen(path, "re"))) {
315 r = errno == ENOENT ? 0 : -errno;
316 goto finish;
317 }
318
319 s->type = SERVICE_FORKING;
320 s->restart = SERVICE_ONCE;
321
322 free(s->sysv_path);
323 if (!(s->sysv_path = strdup(path))) {
324 r = -ENOMEM;
325 goto finish;
326 }
327
328 while (!feof(f)) {
329 char l[LINE_MAX], *t;
330
331 if (!fgets(l, sizeof(l), f)) {
332 if (feof(f))
333 break;
334
335 r = -errno;
336 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
337 goto finish;
338 }
339
340 line++;
341
342 t = strstrip(l);
343 if (*t != '#')
344 continue;
345
346 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
347 state = LSB;
23a177ef 348 s->sysv_has_lsb = true;
2c4104f0
LP		 349 continue;
350 }
351
352 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
353 state = NORMAL;
354 continue;
355 }
356
357 t++;
358 t += strspn(t, WHITESPACE);
359
360 if (state == NORMAL) {
361
362 /* Try to parse Red Hat style chkconfig headers */
363
364 if (startswith(t, "chkconfig:")) {
365 int start_priority;
8309400a 366 char runlevels[16], *k;
2c4104f0
LP		 367
368 state = NORMAL;
369
8309400a
LP		 370 if (sscanf(t+10, "%15s %i %*i",
371 runlevels,
372 &start_priority) != 2) {
2c4104f0
LP		 373
374 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
375 continue;
376 }
377
8309400a 378 if (start_priority < 0 || start_priority > 99)
2c4104f0 379 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
8309400a
LP		 380 else
381 s->sysv_start_priority = start_priority;
382
383 char_array_0(runlevels);
384 k = delete_chars(runlevels, WHITESPACE "-");
385
386 if (k[0]) {
387 char *d;
388
389 if (!(d = strdup(k))) {
390 r = -ENOMEM;
391 goto finish;
392 }
393
394 free(s->sysv_runlevels);
395 s->sysv_runlevels = d;
2c4104f0
LP		 396 }
397
2c4104f0
LP		 398
399 } else if (startswith(t, "description:")) {
400
401 size_t k = strlen(t);
402 char *d;
403
404 if (t[k-1] == '\\') {
405 state = DESCRIPTION;
406 t[k-1] = 0;
407 }
408
409 if (!(d = strdup(strstrip(t+12)))) {
410 r = -ENOMEM;
411 goto finish;
412 }
413
414 free(u->meta.description);
415 u->meta.description = d;
416
417 } else if (startswith(t, "pidfile:")) {
418
419 char *fn;
420
421 state = NORMAL;
422
423 fn = strstrip(t+8);
424 if (!path_is_absolute(fn)) {
425 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
426 continue;
427 }
428
429 if (!(fn = strdup(fn))) {
430 r = -ENOMEM;
431 goto finish;
432 }
433
434 free(s->pid_file);
435 s->pid_file = fn;
436 }
437
438 } else if (state == DESCRIPTION) {
439
440 /* Try to parse Red Hat style description
441 * continuation */
442
443 size_t k = strlen(t);
444 char *d;
445
446 if (t[k-1] == '\\')
447 t[k-1] = 0;
448 else
449 state = NORMAL;
450
451 assert(u->meta.description);
452 if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
453 r = -ENOMEM;
454 goto finish;
455 }
456
457 free(u->meta.description);
458 u->meta.description = d;
459
460 } else if (state == LSB || state == LSB_DESCRIPTION) {
461
462 if (startswith(t, "Provides:")) {
463 char *i, *w;
464 size_t z;
465
466 state = LSB;
467
468 FOREACH_WORD(w, z, t+9, i) {
469 char *n, *m;
470
471 if (!(n = strndup(w, z))) {
472 r = -ENOMEM;
473 goto finish;
474 }
475
476 r = sysv_translate_name(n, &m);
477 free(n);
478
479 if (r < 0)
480 goto finish;
481
482 if (r == 0)
483 continue;
484
bd77d0fc
LP		 485 if (unit_name_to_type(m) == UNIT_SERVICE)
486 r = unit_add_name(u, m);
487 else {
488 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
489 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
490 }
491
2c4104f0
LP		 492 free(m);
493
494 if (r < 0)
495 goto finish;
496 }
497
498 } else if (startswith(t, "Required-Start:") ||
499 startswith(t, "Should-Start:")) {
500 char *i, *w;
501 size_t z;
502
503 state = LSB;
504
505 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
506 char *n, *m;
507
508 if (!(n = strndup(w, z))) {
509 r = -ENOMEM;
510 goto finish;
511 }
512
513 r = sysv_translate_name(n, &m);
514 free(n);
515
516 if (r < 0)
517 goto finish;
518
519 if (r == 0)
520 continue;
521
fc22fc6e 522 r = unit_add_dependency_by_name(u, UNIT_AFTER, m);
2c4104f0
LP		 523 free(m);
524
525 if (r < 0)
526 goto finish;
527 }
8309400a
LP		 528 } else if (startswith(t, "Default-Start:")) {
529 char *k, *d;
530
531 state = LSB;
532
533 k = delete_chars(t+14, WHITESPACE "-");
534
535 if (k[0] != 0) {
536 if (!(d = strdup(k))) {
537 r = -ENOMEM;
538 goto finish;
539 }
540
541 free(s->sysv_runlevels);
542 s->sysv_runlevels = d;
543 }
2c4104f0
LP		 544
545 } else if (startswith(t, "Description:")) {
546 char *d;
547
548 state = LSB_DESCRIPTION;
549
550 if (!(d = strdup(strstrip(t+12)))) {
551 r = -ENOMEM;
552 goto finish;
553 }
554
555 free(u->meta.description);
556 u->meta.description = d;
557
8309400a
LP		 558 } else if (startswith(t, "Short-Description:") &&
559 !u->meta.description) {
2c4104f0
LP		 560 char *d;
561
562 /* We use the short description only
563 * if no long description is set. */
564
565 state = LSB;
566
567 if (!(d = strdup(strstrip(t+18)))) {
568 r = -ENOMEM;
569 goto finish;
570 }
571
2c4104f0
LP		 572 u->meta.description = d;
573
574 } else if (state == LSB_DESCRIPTION) {
575
576 if (startswith(l, "#\t") || startswith(l, "# ")) {
577 char *d;
578
579 assert(u->meta.description);
580 if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
581 r = -ENOMEM;
582 goto finish;
583 }
584
585 free(u->meta.description);
586 u->meta.description = d;
587 } else
588 state = LSB;
589 }
590 }
591 }
592
23a177ef
LP		 593 /* If init scripts have no LSB header, then we enforce the
594 * ordering via the chkconfig priorities. We try to determine
595 * a priority for *all* init scripts here, since they are
596 * needed as soon as at least one non-LSB script is used. */
2c4104f0 597
23a177ef
LP		 598 if (s->sysv_start_priority < 0) {
599 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
600
601 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
2c4104f0
LP		 602 goto finish;
603
23a177ef
LP		 604 if (s->sysv_start_priority < 0)
605 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
606 }
607
2c4104f0
LP		 608 if ((r = sysv_exec_commands(s)) < 0)
609 goto finish;
610
0bc824be
LP		 611 if (!s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels)) {
612 /* If there a runlevels configured for this service
613 * but none of the standard ones, then we assume this
614 * is some special kind of service (which might be
615 * needed for early boot) and don't create any links
616 * to it. */
617
618 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 ||
619 (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0)
620 goto finish;
621 }
0fd030be 622
80876c20
LP		 623 /* Special setting for all SysV services */
624 s->valid_no_process = true;
625
e537352b 626 u->meta.load_state = UNIT_LOADED;
23a177ef 627 r = 0;
2c4104f0
LP		 628
629finish:
630
631 if (f)
632 fclose(f);
633
634 return r;
635}
636
e537352b 637static int service_load_sysv_name(Service *s, const char *name) {
2c4104f0
LP		 638 char **p;
639
640 assert(s);
641 assert(name);
642
643 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
644 char *path;
645 int r;
646
647 if (asprintf(&path, "%s/%s", *p, name) < 0)
648 return -ENOMEM;
649
650 assert(endswith(path, ".service"));
651 path[strlen(path)-8] = 0;
652
e537352b 653 r = service_load_sysv_path(s, path);
2c4104f0
LP		 654 free(path);
655
23a177ef 656 if (r < 0)
2c4104f0 657 return r;
23a177ef 658
e537352b 659 if ((UNIT(s)->meta.load_state != UNIT_STUB))
23a177ef 660 break;
2c4104f0
LP		 661 }
662
663 return 0;
664}
665
e537352b 666static int service_load_sysv(Service *s) {
2c4104f0
LP		 667 const char *t;
668 Iterator i;
669 int r;
670
5cb5a6ff
LP		 671 assert(s);
672
673 /* Load service data from SysV init scripts, preferably with
674 * LSB headers ... */
675
2c4104f0
LP		 676 if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
677 return 0;
678
679 if ((t = unit_id(UNIT(s))))
e537352b 680 if ((r = service_load_sysv_name(s, t)) < 0)
2c4104f0
LP		 681 return r;
682
e537352b 683 if (UNIT(s)->meta.load_state == UNIT_STUB)
23a177ef 684 SET_FOREACH(t, UNIT(s)->meta.names, i) {
e537352b
LP		 685 if (t == unit_id(UNIT(s)))
686 continue;
687
688 if ((r == service_load_sysv_name(s, t)) < 0)
23a177ef
LP		 689 return r;
690
e537352b 691 if (UNIT(s)->meta.load_state != UNIT_STUB)
23a177ef
LP		 692 break;
693 }
2c4104f0
LP		 694
695 return 0;
5cb5a6ff
LP		 696}
697
e537352b 698static void service_init(Unit *u) {
87f0e418 699 Service *s = SERVICE(u);
5cb5a6ff 700
e537352b
LP		 701 assert(u);
702 assert(u->meta.load_state == UNIT_STUB);
034c6ed7
LP		 703
704 s->type = 0;
705 s->restart = 0;
706
707 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
708 s->restart_usec = DEFAULT_RESTART_USEC;
709
710 exec_context_init(&s->exec_context);
711
acbb0225 712 s->timer_watch.type = WATCH_INVALID;
034c6ed7
LP		 713
714 s->state = SERVICE_DEAD;
5cb5a6ff 715
2c4104f0 716 s->sysv_start_priority = -1;
81a2b7ce
LP		 717 s->permissions_start_only = false;
718 s->root_directory_start_only = false;
50159e6a
LP		 719 s->valid_no_process = false;
720 s->kill_mode = 0;
23a177ef 721 s->sysv_has_lsb = false;
50159e6a
LP		 722 s->main_pid = s->control_pid = 0;
723 s->main_pid_known = false;
724 s->failure = false;
23a177ef 725
1e2e8133 726 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
e537352b
LP		 727}
728
729static int service_load(Unit *u) {
730 int r;
731 Service *s = SERVICE(u);
732
733 assert(s);
1e2e8133 734
5cb5a6ff 735 /* Load a .service file */
e537352b 736 if ((r = unit_load_fragment(u)) < 0)
5cb5a6ff
LP		 737 return r;
738
bd77d0fc 739 /* Load a classic init script as a fallback, if we couldn't find anything */
e537352b
LP		 740 if (u->meta.load_state == UNIT_STUB)
741 if ((r = service_load_sysv(s)) < 0)
23a177ef 742 return r;
d46de8a1 743
23a177ef 744 /* Still nothing found? Then let's give up */
e537352b 745 if (u->meta.load_state == UNIT_STUB)
23a177ef 746 return -ENOENT;
034c6ed7 747
23a177ef
LP		 748 /* We were able to load something, then let's add in the
749 * dropin directories. */
750 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
8e274523 751 return r;
23a177ef
LP		 752
753 /* This is a new unit? Then let's add in some extras */
e537352b 754 if (u->meta.load_state == UNIT_LOADED) {
23a177ef
LP		 755 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
756 return r;
757
758 if ((r = unit_add_default_cgroup(u)) < 0)
759 return r;
760
761 if ((r = sysv_chkconfig_order(s)) < 0)
762 return r;
8e274523
LP		 763 }
764
44d8db9e 765 return 0;
034c6ed7
LP		 766}
767
87f0e418 768static void service_dump(Unit *u, FILE *f, const char *prefix) {
5cb5a6ff 769
5cb5a6ff 770 ServiceExecCommand c;
87f0e418 771 Service *s = SERVICE(u);
47be870b
LP		 772 const char *prefix2;
773 char *p2;
5cb5a6ff
LP		 774
775 assert(s);
776
47be870b
LP		 777 p2 = strappend(prefix, "\t");
778 prefix2 = p2 ? p2 : prefix;
44d8db9e 779
5cb5a6ff 780 fprintf(f,
81a2b7ce
LP		 781 "%sService State: %s\n"
782 "%sPermissionsStartOnly: %s\n"
8e274523 783 "%sRootDirectoryStartOnly: %s\n"
03d6ab85 784 "%sValidNoProcess: %s\n"
50159e6a 785 "%sKillMode: %s\n"
03d6ab85 786 "%sType: %s\n",
81a2b7ce
LP		 787 prefix, service_state_to_string(s->state),
788 prefix, yes_no(s->permissions_start_only),
8e274523 789 prefix, yes_no(s->root_directory_start_only),
03d6ab85 790 prefix, yes_no(s->valid_no_process),
50159e6a 791 prefix, kill_mode_to_string(s->kill_mode),
03d6ab85 792 prefix, service_type_to_string(s->type));
5cb5a6ff 793
70123e68
LP		 794 if (s->control_pid > 0)
795 fprintf(f,
796 "%sControl PID: %llu\n",
797 prefix, (unsigned long long) s->control_pid);
798
799 if (s->main_pid > 0)
800 fprintf(f,
801 "%sMain PID: %llu\n",
802 prefix, (unsigned long long) s->main_pid);
803
034c6ed7
LP		 804 if (s->pid_file)
805 fprintf(f,
806 "%sPIDFile: %s\n",
807 prefix, s->pid_file);
808
5cb5a6ff
LP		 809 exec_context_dump(&s->exec_context, f, prefix);
810
e537352b 811 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
5cb5a6ff 812
44d8db9e
LP		 813 if (!s->exec_command[c])
814 continue;
815
816 fprintf(f, "%s→ %s:\n",
94f04347 817 prefix, service_exec_command_to_string(c));
44d8db9e
LP		 818
819 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 820 }
44d8db9e 821
2c4104f0
LP		 822 if (s->sysv_path)
823 fprintf(f,
23a177ef
LP		 824 "%sSysV Init Script Path: %s\n"
825 "%sSysV Init Script has LSB Header: %s\n",
826 prefix, s->sysv_path,
827 prefix, yes_no(s->sysv_has_lsb));
2c4104f0
LP		 828
829 if (s->sysv_start_priority >= 0)
830 fprintf(f,
23a177ef 831 "%sSysVStartPriority: %i\n",
2c4104f0
LP		 832 prefix, s->sysv_start_priority);
833
8309400a
LP		 834 if (s->sysv_runlevels)
835 fprintf(f, "%sSysVRunLevels: %s\n",
836 prefix, s->sysv_runlevels);
23a177ef 837
47be870b 838 free(p2);
5cb5a6ff
LP		 839}
840
034c6ed7
LP		 841static int service_load_pid_file(Service *s) {
842 char *k;
843 unsigned long p;
844 int r;
845
846 assert(s);
847
848 if (s->main_pid_known)
849 return 0;
850
5e94833f
LP		 851 assert(s->main_pid <= 0);
852
034c6ed7
LP		 853 if (!s->pid_file)
854 return -ENOENT;
855
856 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
857 return r;
858
859 if ((r = safe_atolu(k, &p)) < 0) {
860 free(k);
861 return r;
862 }
863
864 if ((unsigned long) (pid_t) p != p)
865 return -ERANGE;
866
b8c597d5
LP		 867 if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
868 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
869 (unsigned long long) p, s->pid_file);
870 return -ESRCH;
871 }
872
16f6025e
LP		 873 if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
874 /* FIXME: we need to do something here */
875 return r;
876
b8c597d5 877 s->main_pid = (pid_t) p;
034c6ed7
LP		 878 s->main_pid_known = true;
879
880 return 0;
881}
882
3e33402a
LP		 883static int service_get_sockets(Service *s, Set **_set) {
884 Set *set;
ceee3d82
LP		 885 Iterator i;
886 char *t;
3e33402a 887 int r;
ceee3d82
LP		 888
889 assert(s);
3e33402a
LP		 890 assert(_set);
891
892 /* Collects all Socket objects that belong to this
893 * service. Note that a service might have multiple sockets
894 * via multiple names. */
895
896 if (!(set = set_new(NULL, NULL)))
897 return -ENOMEM;
ceee3d82
LP		 898
899 SET_FOREACH(t, UNIT(s)->meta.names, i) {
900 char *k;
901 Unit *p;
902
903 /* Look for all socket objects that go by any of our
904 * units and collect their fds */
905
3e33402a
LP		 906 if (!(k = unit_name_change_suffix(t, ".socket"))) {
907 r = -ENOMEM;
908 goto fail;
909 }
ceee3d82
LP		 910
911 p = manager_get_unit(UNIT(s)->meta.manager, k);
912 free(k);
913
3e33402a 914 if (!p) continue;
ceee3d82 915
3e33402a
LP		 916 if ((r = set_put(set, p)) < 0)
917 goto fail;
ceee3d82
LP		 918 }
919
3e33402a
LP		 920 *_set = set;
921 return 0;
922
923fail:
924 set_free(set);
925 return r;
926}
927
928
e537352b 929static int service_notify_sockets_dead(Service *s) {
3e33402a
LP		 930 Iterator i;
931 Set *set;
47be870b 932 Socket *sock;
3e33402a
LP		 933 int r;
934
935 assert(s);
936
937 /* Notifies all our sockets when we die */
938
939 if ((r = service_get_sockets(s, &set)) < 0)
940 return r;
941
47be870b
LP		 942 SET_FOREACH(sock, set, i)
943 socket_notify_service_dead(sock);
3e33402a
LP		 944
945 set_free(set);
946
ceee3d82
LP		 947 return 0;
948}
949
034c6ed7
LP		 950static void service_set_state(Service *s, ServiceState state) {
951 ServiceState old_state;
5cb5a6ff
LP		 952 assert(s);
953
034c6ed7 954 old_state = s->state;
5cb5a6ff 955 s->state = state;
034c6ed7
LP		 956
957 if (state != SERVICE_START_PRE &&
958 state != SERVICE_START &&
959 state != SERVICE_START_POST &&
960 state != SERVICE_RELOAD &&
961 state != SERVICE_STOP &&
962 state != SERVICE_STOP_SIGTERM &&
963 state != SERVICE_STOP_SIGKILL &&
964 state != SERVICE_STOP_POST &&
965 state != SERVICE_FINAL_SIGTERM &&
966 state != SERVICE_FINAL_SIGKILL &&
967 state != SERVICE_AUTO_RESTART)
acbb0225 968 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7 969
7d55e835
LP		 970 if (state != SERVICE_START &&
971 state != SERVICE_START_POST &&
034c6ed7
LP		 972 state != SERVICE_RUNNING &&
973 state != SERVICE_RELOAD &&
974 state != SERVICE_STOP &&
975 state != SERVICE_STOP_SIGTERM &&
976 state != SERVICE_STOP_SIGKILL)
5e94833f 977 service_unwatch_main_pid(s);
034c6ed7
LP		 978
979 if (state != SERVICE_START_PRE &&
980 state != SERVICE_START &&
981 state != SERVICE_START_POST &&
982 state != SERVICE_RELOAD &&
983 state != SERVICE_STOP &&
984 state != SERVICE_STOP_SIGTERM &&
985 state != SERVICE_STOP_SIGKILL &&
986 state != SERVICE_STOP_POST &&
987 state != SERVICE_FINAL_SIGTERM &&
e537352b 988 state != SERVICE_FINAL_SIGKILL) {
5e94833f 989 service_unwatch_control_pid(s);
034c6ed7 990 s->control_command = NULL;
e537352b 991 }
034c6ed7 992
ceee3d82
LP		 993 if (state == SERVICE_DEAD ||
994 state == SERVICE_STOP ||
995 state == SERVICE_STOP_SIGTERM ||
996 state == SERVICE_STOP_SIGKILL ||
997 state == SERVICE_STOP_POST ||
998 state == SERVICE_FINAL_SIGTERM ||
999 state == SERVICE_FINAL_SIGKILL ||
1000 state == SERVICE_MAINTAINANCE ||
1001 state == SERVICE_AUTO_RESTART)
e537352b 1002 service_notify_sockets_dead(s);
ceee3d82 1003
e537352b
LP		 1004 if (old_state != state)
1005 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
acbb0225
LP		 1006
1007 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
034c6ed7
LP		 1008}
1009
44d8db9e
LP		 1010static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1011 Iterator i;
1012 int r;
1013 int *rfds = NULL;
1014 unsigned rn_fds = 0;
3e33402a 1015 Set *set;
47be870b 1016 Socket *sock;
44d8db9e
LP		 1017
1018 assert(s);
1019 assert(fds);
1020 assert(n_fds);
1021
3e33402a
LP		 1022 if ((r = service_get_sockets(s, &set)) < 0)
1023 return r;
1024
47be870b 1025 SET_FOREACH(sock, set, i) {
44d8db9e
LP		 1026 int *cfds;
1027 unsigned cn_fds;
1028
47be870b 1029 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
44d8db9e
LP		 1030 goto fail;
1031
1032 if (!cfds)
1033 continue;
1034
1035 if (!rfds) {
1036 rfds = cfds;
1037 rn_fds = cn_fds;
1038 } else {
1039 int *t;
1040
1041 if (!(t = new(int, rn_fds+cn_fds))) {
1042 free(cfds);
1043 r = -ENOMEM;
1044 goto fail;
1045 }
1046
1047 memcpy(t, rfds, rn_fds);
1048 memcpy(t+rn_fds, cfds, cn_fds);
1049 free(rfds);
1050 free(cfds);
1051
1052 rfds = t;
1053 rn_fds = rn_fds+cn_fds;
1054 }
1055 }
1056
1057 *fds = rfds;
1058 *n_fds = rn_fds;
3e33402a
LP		 1059
1060 set_free(set);
1061
44d8db9e
LP		 1062 return 0;
1063
1064fail:
3e33402a 1065 set_free(set);
44d8db9e 1066 free(rfds);
3e33402a 1067
44d8db9e
LP		 1068 return r;
1069}
1070
81a2b7ce
LP		 1071static int service_spawn(
1072 Service *s,
1073 ExecCommand *c,
1074 bool timeout,
1075 bool pass_fds,
1076 bool apply_permissions,
1077 bool apply_chroot,
1078 pid_t *_pid) {
1079
034c6ed7
LP		 1080 pid_t pid;
1081 int r;
44d8db9e
LP		 1082 int *fds = NULL;
1083 unsigned n_fds = 0;
034c6ed7
LP		 1084
1085 assert(s);
1086 assert(c);
1087 assert(_pid);
1088
44d8db9e
LP		 1089 if (pass_fds)
1090 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1091 goto fail;
1092
034c6ed7 1093 if (timeout) {
acbb0225 1094 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
034c6ed7
LP		 1095 goto fail;
1096 } else
acbb0225 1097 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7 1098
81a2b7ce
LP		 1099 if ((r = exec_spawn(c,
1100 &s->exec_context,
1101 fds, n_fds,
1102 apply_permissions,
1103 apply_chroot,
80876c20 1104 UNIT(s)->meta.manager->confirm_spawn,
8e274523 1105 UNIT(s)->meta.cgroup_bondings,
81a2b7ce 1106 &pid)) < 0)
034c6ed7
LP		 1107 goto fail;
1108
87f0e418 1109 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
034c6ed7
LP		 1110 /* FIXME: we need to do something here */
1111 goto fail;
1112
44d8db9e 1113 free(fds);
034c6ed7
LP		 1114 *_pid = pid;
1115
5cb5a6ff 1116 return 0;
034c6ed7
LP		 1117
1118fail:
44d8db9e
LP		 1119 free(fds);
1120
034c6ed7 1121 if (timeout)
acbb0225 1122 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7
LP		 1123
1124 return r;
1125}
1126
80876c20
LP		 1127static int main_pid_good(Service *s) {
1128 assert(s);
1129
1130 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1131 * don't know */
1132
1133 /* If we know the pid file, then lets just check if it is
1134 * still valid */
1135 if (s->main_pid_known)
1136 return s->main_pid > 0;
1137
1138 /* We don't know the pid */
1139 return -EAGAIN;
1140}
1141
1142static int control_pid_good(Service *s) {
1143 assert(s);
1144
1145 return s->control_pid > 0;
1146}
1147
1148static int cgroup_good(Service *s) {
1149 int r;
1150
1151 assert(s);
1152
1153 if (s->valid_no_process)
1154 return -EAGAIN;
1155
1156 if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1157 return r;
1158
1159 return !r;
1160}
1161
034c6ed7
LP		 1162static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1163 int r;
1164 assert(s);
1165
1166 if (!success)
1167 s->failure = true;
1168
1169 if (allow_restart &&
1170 (s->restart == SERVICE_RESTART_ALWAYS ||
1171 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1172
acbb0225 1173 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
034c6ed7
LP		 1174 goto fail;
1175
1176 service_set_state(s, SERVICE_AUTO_RESTART);
1177 } else
1178 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1179
1180 return;
1181
1182fail:
87f0e418 1183 log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1184 service_enter_dead(s, false, false);
1185}
1186
1187static void service_enter_signal(Service *s, ServiceState state, bool success);
1188
1189static void service_enter_stop_post(Service *s, bool success) {
1190 int r;
1191 assert(s);
1192
1193 if (!success)
1194 s->failure = true;
1195
5e94833f
LP		 1196 service_unwatch_control_pid(s);
1197
80876c20 1198 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
81a2b7ce
LP		 1199 if ((r = service_spawn(s,
1200 s->control_command,
1201 true,
1202 false,
1203 !s->permissions_start_only,
1204 !s->root_directory_start_only,
1205 &s->control_pid)) < 0)
034c6ed7
LP		 1206 goto fail;
1207
d6ea93e3 1208
80876c20
LP		 1209 service_set_state(s, SERVICE_STOP_POST);
1210 } else
1211 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
034c6ed7
LP		 1212
1213 return;
1214
1215fail:
80876c20 1216 log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1217 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1218}
1219
1220static void service_enter_signal(Service *s, ServiceState state, bool success) {
1221 int r;
1222 bool sent = false;
1223
1224 assert(s);
1225
1226 if (!success)
1227 s->failure = true;
1228
80876c20
LP		 1229 if (s->kill_mode != KILL_NONE) {
1230 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
034c6ed7 1231
50159e6a 1232 if (s->kill_mode == KILL_CONTROL_GROUP) {
034c6ed7 1233
50159e6a
LP		 1234 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1235 if (r != -EAGAIN && r != -ESRCH)
1236 goto fail;
1237 } else
034c6ed7
LP		 1238 sent = true;
1239 }
1240
50159e6a
LP		 1241 if (!sent) {
1242 r = 0;
80876c20 1243
50159e6a
LP		 1244 if (s->main_pid > 0) {
1245 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1246 r = -errno;
1247 else
1248 sent = true;
1249 }
1250
1251 if (s->control_pid > 0) {
1252 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1253 r = -errno;
1254 else
1255 sent = true;
1256 }
1257
1258 if (r < 0)
1259 goto fail;
1260 }
d6ea93e3 1261 }
034c6ed7 1262
80876c20
LP		 1263 if (sent) {
1264 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1265 goto fail;
d6ea93e3 1266
80876c20
LP		 1267 service_set_state(s, state);
1268 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1269 service_enter_stop_post(s, true);
1270 else
034c6ed7
LP		 1271 service_enter_dead(s, true, true);
1272
1273 return;
1274
1275fail:
87f0e418 1276 log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7 1277
80876c20 1278 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
034c6ed7
LP		 1279 service_enter_stop_post(s, false);
1280 else
1281 service_enter_dead(s, false, true);
1282}
1283
1284static void service_enter_stop(Service *s, bool success) {
1285 int r;
1286 assert(s);
1287
1288 if (!success)
1289 s->failure = true;
1290
5e94833f
LP		 1291 service_unwatch_control_pid(s);
1292
80876c20 1293 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
81a2b7ce
LP		 1294 if ((r = service_spawn(s,
1295 s->control_command,
1296 true,
1297 false,
1298 !s->permissions_start_only,
1299 !s->root_directory_start_only,
1300 &s->control_pid)) < 0)
034c6ed7
LP		 1301 goto fail;
1302
80876c20
LP		 1303 service_set_state(s, SERVICE_STOP);
1304 } else
034c6ed7
LP		 1305 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1306
1307 return;
1308
1309fail:
87f0e418 1310 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1311 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1312}
1313
80876c20
LP		 1314static void service_enter_running(Service *s, bool success) {
1315 assert(s);
1316
1317 if (!success)
1318 s->failure = true;
1319
1320 if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1321 service_set_state(s, SERVICE_RUNNING);
1322 else if (s->valid_no_process)
1323 service_set_state(s, SERVICE_EXITED);
1324 else
1325 service_enter_stop(s, true);
1326}
1327
034c6ed7
LP		 1328static void service_enter_start_post(Service *s) {
1329 int r;
1330 assert(s);
1331
5e94833f
LP		 1332 service_unwatch_control_pid(s);
1333
80876c20 1334 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
81a2b7ce
LP		 1335 if ((r = service_spawn(s,
1336 s->control_command,
1337 true,
1338 false,
1339 !s->permissions_start_only,
1340 !s->root_directory_start_only,
1341 &s->control_pid)) < 0)
034c6ed7
LP		 1342 goto fail;
1343
d6ea93e3 1344
80876c20
LP		 1345 service_set_state(s, SERVICE_START_POST);
1346 } else
1347 service_enter_running(s, true);
034c6ed7
LP		 1348
1349 return;
1350
1351fail:
87f0e418 1352 log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1353 service_enter_stop(s, false);
1354}
1355
1356static void service_enter_start(Service *s) {
1357 pid_t pid;
1358 int r;
1359
1360 assert(s);
1361
1362 assert(s->exec_command[SERVICE_EXEC_START]);
1363 assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1364
80876c20
LP		 1365 if (s->type == SERVICE_FORKING)
1366 service_unwatch_control_pid(s);
1367 else
1368 service_unwatch_main_pid(s);
1369
81a2b7ce
LP		 1370 if ((r = service_spawn(s,
1371 s->exec_command[SERVICE_EXEC_START],
1372 s->type == SERVICE_FORKING,
1373 true,
1374 true,
1375 true,
1376 &pid)) < 0)
034c6ed7
LP		 1377 goto fail;
1378
1379 if (s->type == SERVICE_SIMPLE) {
1380 /* For simple services we immediately start
1381 * the START_POST binaries. */
1382
1383 s->main_pid = pid;
1384 s->main_pid_known = true;
80876c20 1385
034c6ed7
LP		 1386 service_enter_start_post(s);
1387
1388 } else if (s->type == SERVICE_FORKING) {
1389
1390 /* For forking services we wait until the start
1391 * process exited. */
1392
1393 s->control_pid = pid;
80876c20 1394
034c6ed7 1395 s->control_command = s->exec_command[SERVICE_EXEC_START];
80876c20
LP		 1396 service_set_state(s, SERVICE_START);
1397
7d55e835
LP		 1398 } else if (s->type == SERVICE_FINISH) {
1399
1400 /* For finishing services we wait until the start
1401 * process exited, too, but it is our main process. */
1402
1403 s->main_pid = pid;
5e94833f 1404 s->main_pid_known = true;
80876c20 1405
7d55e835 1406 s->control_command = s->exec_command[SERVICE_EXEC_START];
80876c20 1407 service_set_state(s, SERVICE_START);
034c6ed7
LP		 1408 } else
1409 assert_not_reached("Unknown service type");
1410
1411 return;
1412
1413fail:
87f0e418 1414 log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
80876c20 1415 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
034c6ed7
LP		 1416}
1417
1418static void service_enter_start_pre(Service *s) {
1419 int r;
1420
1421 assert(s);
1422
5e94833f
LP		 1423 service_unwatch_control_pid(s);
1424
80876c20 1425 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
81a2b7ce
LP		 1426 if ((r = service_spawn(s,
1427 s->control_command,
1428 true,
1429 false,
1430 !s->permissions_start_only,
1431 !s->root_directory_start_only,
1432 &s->control_pid)) < 0)
034c6ed7
LP		 1433 goto fail;
1434
80876c20
LP		 1435 service_set_state(s, SERVICE_START_PRE);
1436 } else
034c6ed7
LP		 1437 service_enter_start(s);
1438
1439 return;
1440
1441fail:
87f0e418 1442 log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1443 service_enter_dead(s, false, true);
1444}
1445
1446static void service_enter_restart(Service *s) {
1447 int r;
1448 assert(s);
1449
87f0e418 1450 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
034c6ed7
LP		 1451 goto fail;
1452
87f0e418 1453 log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
034c6ed7
LP		 1454 service_enter_dead(s, true, false);
1455 return;
1456
1457fail:
1458
87f0e418 1459 log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1460 service_enter_dead(s, false, false);
1461}
1462
1463static void service_enter_reload(Service *s) {
1464 int r;
1465
1466 assert(s);
1467
5e94833f
LP		 1468 service_unwatch_control_pid(s);
1469
80876c20 1470 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
81a2b7ce
LP		 1471 if ((r = service_spawn(s,
1472 s->control_command,
1473 true,
1474 false,
1475 !s->permissions_start_only,
1476 !s->root_directory_start_only,
1477 &s->control_pid)) < 0)
034c6ed7
LP		 1478 goto fail;
1479
80876c20
LP		 1480 service_set_state(s, SERVICE_RELOAD);
1481 } else
1482 service_enter_running(s, true);
034c6ed7
LP		 1483
1484 return;
1485
1486fail:
87f0e418 1487 log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1488 service_enter_stop(s, false);
1489}
1490
1491static void service_run_next(Service *s, bool success) {
1492 int r;
1493
1494 assert(s);
1495 assert(s->control_command);
1496 assert(s->control_command->command_next);
1497
1498 if (!success)
1499 s->failure = true;
1500
1501 s->control_command = s->control_command->command_next;
1502
5e94833f
LP		 1503 service_unwatch_control_pid(s);
1504
81a2b7ce
LP		 1505 if ((r = service_spawn(s,
1506 s->control_command,
1507 true,
1508 false,
1509 !s->permissions_start_only,
1510 !s->root_directory_start_only,
1511 &s->control_pid)) < 0)
034c6ed7
LP		 1512 goto fail;
1513
1514 return;
1515
1516fail:
87f0e418 1517 log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7 1518
80876c20
LP		 1519 if (s->state == SERVICE_START_PRE)
1520 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1521 else if (s->state == SERVICE_STOP)
1522 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
034c6ed7
LP		 1523 else if (s->state == SERVICE_STOP_POST)
1524 service_enter_dead(s, false, true);
1525 else
1526 service_enter_stop(s, false);
5cb5a6ff
LP		 1527}
1528
87f0e418
LP		 1529static int service_start(Unit *u) {
1530 Service *s = SERVICE(u);
5cb5a6ff
LP		 1531
1532 assert(s);
1533
034c6ed7
LP		 1534 /* We cannot fulfill this request right now, try again later
1535 * please! */
1536 if (s->state == SERVICE_STOP ||
1537 s->state == SERVICE_STOP_SIGTERM ||
1538 s->state == SERVICE_STOP_SIGKILL ||
1539 s->state == SERVICE_STOP_POST ||
1540 s->state == SERVICE_FINAL_SIGTERM ||
1541 s->state == SERVICE_FINAL_SIGKILL)
5cb5a6ff
LP		 1542 return -EAGAIN;
1543
034c6ed7
LP		 1544 /* Already on it! */
1545 if (s->state == SERVICE_START_PRE ||
1546 s->state == SERVICE_START ||
1547 s->state == SERVICE_START_POST)
1548 return 0;
1549
1550 assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
5cb5a6ff 1551
1e2e8133
LP		 1552 /* Make sure we don't enter a busy loop of some kind. */
1553 if (!ratelimit_test(&s->ratelimit)) {
1554 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1555 return -EAGAIN;
1556 }
1557
034c6ed7
LP		 1558 s->failure = false;
1559 s->main_pid_known = false;
1560
1561 service_enter_start_pre(s);
1562 return 0;
5cb5a6ff
LP		 1563}
1564
87f0e418
LP		 1565static int service_stop(Unit *u) {
1566 Service *s = SERVICE(u);
5cb5a6ff
LP		 1567
1568 assert(s);
1569
e537352b 1570 /* Cannot do this now */
034c6ed7
LP		 1571 if (s->state == SERVICE_START_PRE ||
1572 s->state == SERVICE_START ||
1573 s->state == SERVICE_START_POST ||
1574 s->state == SERVICE_RELOAD)
1575 return -EAGAIN;
1576
e537352b
LP		 1577 /* Already on it */
1578 if (s->state == SERVICE_STOP ||
1579 s->state == SERVICE_STOP_SIGTERM ||
1580 s->state == SERVICE_STOP_SIGKILL ||
1581 s->state == SERVICE_STOP_POST ||
1582 s->state == SERVICE_FINAL_SIGTERM ||
1583 s->state == SERVICE_FINAL_SIGKILL)
1584 return 0;
1585
034c6ed7
LP		 1586 if (s->state == SERVICE_AUTO_RESTART) {
1587 service_set_state(s, SERVICE_DEAD);
1588 return 0;
1589 }
1590
80876c20 1591 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
5cb5a6ff 1592
034c6ed7 1593 service_enter_stop(s, true);
5cb5a6ff
LP		 1594 return 0;
1595}
1596
87f0e418
LP		 1597static int service_reload(Unit *u) {
1598 Service *s = SERVICE(u);
034c6ed7
LP		 1599
1600 assert(s);
1601
80876c20 1602 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
034c6ed7
LP		 1603
1604 service_enter_reload(s);
5cb5a6ff
LP		 1605 return 0;
1606}
1607
87f0e418
LP		 1608static bool service_can_reload(Unit *u) {
1609 Service *s = SERVICE(u);
034c6ed7
LP		 1610
1611 assert(s);
1612
1613 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1614}
1615
87f0e418
LP		 1616static UnitActiveState service_active_state(Unit *u) {
1617 assert(u);
5cb5a6ff 1618
acbb0225 1619 return state_translation_table[SERVICE(u)->state];
034c6ed7
LP		 1620}
1621
87f0e418
LP		 1622static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1623 Service *s = SERVICE(u);
034c6ed7 1624 bool success;
5cb5a6ff
LP		 1625
1626 assert(s);
034c6ed7
LP		 1627 assert(pid >= 0);
1628
bd982a8b 1629 success = code == CLD_EXITED && status == 0;
034c6ed7
LP		 1630 s->failure = s->failure || !success;
1631
1632 if (s->main_pid == pid) {
1633
1634 exec_status_fill(&s->main_exec_status, pid, code, status);
1635 s->main_pid = 0;
1636
7d55e835 1637 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
034c6ed7
LP		 1638 assert(s->exec_command[SERVICE_EXEC_START]);
1639 s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1640 }
1641
50159e6a 1642 log_debug("%s: main process exited, code=%s, status=%i", unit_id(u), sigchld_code_to_string(code), status);
034c6ed7
LP		 1643
1644 /* The service exited, so the service is officially
1645 * gone. */
1646
1647 switch (s->state) {
1648
1649 case SERVICE_START_POST:
1650 case SERVICE_RELOAD:
1651 case SERVICE_STOP:
1652 /* Need to wait until the operation is
1653 * done */
1654 break;
1655
7d55e835
LP		 1656 case SERVICE_START:
1657 assert(s->type == SERVICE_FINISH);
1658
1659 /* This was our main goal, so let's go on */
1660 if (success)
1661 service_enter_start_post(s);
1662 else
80876c20 1663 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
7d55e835
LP		 1664 break;
1665
034c6ed7 1666 case SERVICE_RUNNING:
80876c20 1667 service_enter_running(s, success);
034c6ed7
LP		 1668 break;
1669
1670 case SERVICE_STOP_SIGTERM:
1671 case SERVICE_STOP_SIGKILL:
1672
1673 if (!control_pid_good(s))
1674 service_enter_stop_post(s, success);
5cb5a6ff 1675
034c6ed7
LP		 1676 /* If there is still a control process, wait for that first */
1677 break;
5cb5a6ff 1678
034c6ed7
LP		 1679 default:
1680 assert_not_reached("Uh, main process died at wrong time.");
1681 }
5cb5a6ff 1682
034c6ed7
LP		 1683 } else if (s->control_pid == pid) {
1684 assert(s->control_command);
1685
1686 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1687 s->control_pid = 0;
1688
94f04347 1689 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
034c6ed7
LP		 1690
1691 /* If we are shutting things down anyway we
1692 * don't care about failing commands. */
1693
80876c20 1694 if (s->control_command->command_next && success) {
034c6ed7
LP		 1695
1696 /* There is another command to *
1697 * execute, so let's do that. */
1698
80876c20 1699 log_debug("%s running next command for state %s", unit_id(u), service_state_to_string(s->state));
034c6ed7
LP		 1700 service_run_next(s, success);
1701
80876c20 1702 } else {
034c6ed7
LP		 1703 /* No further commands for this step, so let's
1704 * figure out what to do next */
1705
94f04347 1706 log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
bd982a8b 1707
034c6ed7
LP		 1708 switch (s->state) {
1709
1710 case SERVICE_START_PRE:
1711 if (success)
1712 service_enter_start(s);
1713 else
80876c20 1714 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
034c6ed7
LP		 1715 break;
1716
1717 case SERVICE_START:
1718 assert(s->type == SERVICE_FORKING);
1719
1720 /* Let's try to load the pid
1721 * file here if we can. We
1722 * ignore the return value,
1723 * since the PID file might
1724 * actually be created by a
1725 * START_POST script */
1726
1727 if (success) {
1728 if (s->pid_file)
1729 service_load_pid_file(s);
1730
1731 service_enter_start_post(s);
1732 } else
80876c20 1733 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
034c6ed7
LP		 1734
1735 break;
1736
1737 case SERVICE_START_POST:
1738 if (success && s->pid_file && !s->main_pid_known) {
1739 int r;
1740
1741 /* Hmm, let's see if we can
1742 * load the pid now after the
1743 * start-post scripts got
1744 * executed. */
1745
1746 if ((r = service_load_pid_file(s)) < 0)
87f0e418 1747 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
034c6ed7
LP		 1748 }
1749
1750 /* Fall through */
1751
1752 case SERVICE_RELOAD:
80876c20
LP		 1753 if (success)
1754 service_enter_running(s, true);
1755 else
034c6ed7
LP		 1756 service_enter_stop(s, false);
1757
1758 break;
1759
1760 case SERVICE_STOP:
80876c20 1761 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
034c6ed7
LP		 1762 break;
1763
1764 case SERVICE_STOP_SIGTERM:
1765 case SERVICE_STOP_SIGKILL:
1766 if (main_pid_good(s) <= 0)
1767 service_enter_stop_post(s, success);
1768
1769 /* If there is still a service
1770 * process around, wait until
1771 * that one quit, too */
1772 break;
1773
1774 case SERVICE_STOP_POST:
1775 case SERVICE_FINAL_SIGTERM:
1776 case SERVICE_FINAL_SIGKILL:
1777 service_enter_dead(s, success, true);
1778 break;
1779
1780 default:
1781 assert_not_reached("Uh, control process died at wrong time.");
1782 }
1783 }
1784 } else
1785 assert_not_reached("Got SIGCHLD for unkown PID");
1786}
1787
acbb0225 1788static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
87f0e418 1789 Service *s = SERVICE(u);
034c6ed7
LP		 1790
1791 assert(s);
1792 assert(elapsed == 1);
1793
acbb0225 1794 assert(w == &s->timer_watch);
034c6ed7
LP		 1795
1796 switch (s->state) {
1797
1798 case SERVICE_START_PRE:
1799 case SERVICE_START:
80876c20
LP		 1800 log_warning("%s operation timed out. Terminating.", unit_id(u));
1801 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1802 break;
1803
034c6ed7
LP		 1804 case SERVICE_START_POST:
1805 case SERVICE_RELOAD:
87f0e418 1806 log_warning("%s operation timed out. Stopping.", unit_id(u));
034c6ed7
LP		 1807 service_enter_stop(s, false);
1808 break;
1809
1810 case SERVICE_STOP:
87f0e418 1811 log_warning("%s stopping timed out. Terminating.", unit_id(u));
034c6ed7
LP		 1812 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1813 break;
1814
1815 case SERVICE_STOP_SIGTERM:
87f0e418 1816 log_warning("%s stopping timed out. Killing.", unit_id(u));
034c6ed7
LP		 1817 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1818 break;
1819
1820 case SERVICE_STOP_SIGKILL:
1821 /* Uh, wie sent a SIGKILL and it is still not gone?
1822 * Must be something we cannot kill, so let's just be
1823 * weirded out and continue */
1824
87f0e418 1825 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
034c6ed7
LP		 1826 service_enter_stop_post(s, false);
1827 break;
1828
1829 case SERVICE_STOP_POST:
87f0e418 1830 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
034c6ed7
LP		 1831 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1832 break;
1833
1834 case SERVICE_FINAL_SIGTERM:
87f0e418 1835 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
034c6ed7
LP		 1836 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1837 break;
1838
1839 case SERVICE_FINAL_SIGKILL:
87f0e418 1840 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
034c6ed7
LP		 1841 service_enter_dead(s, false, true);
1842 break;
1843
1844 case SERVICE_AUTO_RESTART:
87f0e418 1845 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
034c6ed7
LP		 1846 service_enter_restart(s);
1847 break;
1848
1849 default:
1850 assert_not_reached("Timeout at wrong time.");
1851 }
5cb5a6ff
LP		 1852}
1853
8e274523
LP		 1854static void service_cgroup_notify_event(Unit *u) {
1855 Service *s = SERVICE(u);
1856
1857 assert(u);
1858
1859 log_debug("%s: cgroup is empty", unit_id(u));
1860
1861 switch (s->state) {
1862
1863 /* Waiting for SIGCHLD is usually more interesting,
1864 * because it includes return codes/signals. Which is
1865 * why we ignore the cgroup events for most cases,
1866 * except when we don't know pid which to expect the
1867 * SIGCHLD for. */
1868
1869 case SERVICE_RUNNING:
80876c20 1870 service_enter_running(s, true);
8e274523
LP		 1871 break;
1872
1873 default:
1874 ;
1875 }
1876}
1877
2c4104f0 1878static int service_enumerate(Manager *m) {
2c4104f0
LP		 1879 char **p;
1880 unsigned i;
1881 DIR *d = NULL;
1882 char *path = NULL, *fpath = NULL, *name = NULL;
1883 int r;
1884
1885 assert(m);
1886
5e177ece 1887 STRV_FOREACH(p, m->sysvrcnd_path)
23a177ef 1888 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
2c4104f0
LP		 1889 struct dirent *de;
1890
1891 free(path);
1892 path = NULL;
23a177ef 1893 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
2c4104f0
LP		 1894 r = -ENOMEM;
1895 goto finish;
1896 }
1897
1898 if (d)
1899 closedir(d);
1900
1901 if (!(d = opendir(path))) {
1902 if (errno != ENOENT)
1903 log_warning("opendir() failed on %s: %s", path, strerror(errno));
1904
1905 continue;
1906 }
1907
1908 while ((de = readdir(d))) {
1909 Unit *runlevel, *service;
1910
1911 if (ignore_file(de->d_name))
1912 continue;
1913
1914 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1915 continue;
1916
1917 if (strlen(de->d_name) < 4)
1918 continue;
1919
1920 free(fpath);
1921 fpath = NULL;
23a177ef 1922 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
2c4104f0
LP		 1923 r = -ENOMEM;
1924 goto finish;
1925 }
1926
1927 if (access(fpath, X_OK) < 0) {
1928
1929 if (errno != ENOENT)
1930 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1931
1932 continue;
1933 }
1934
1935 free(name);
1936 name = NULL;
1937 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1938 r = -ENOMEM;
1939 goto finish;
1940 }
1941
1942 if ((r = manager_load_unit(m, name, &service)) < 0)
1943 goto finish;
1944
23a177ef 1945 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
2c4104f0
LP		 1946 goto finish;
1947
1948 if (de->d_name[0] == 'S') {
1949 if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1950 goto finish;
1951
1952 if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1953 goto finish;
23a177ef
LP		 1954
1955 } else if (de->d_name[0] == 'K' &&
1956 (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1957 streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1958
1959 /* We honour K links only for
1960 * halt/reboot. For the normal
1961 * runlevels we assume the
1962 * stop jobs will be
1963 * implicitly added by the
1964 * core logic. */
1965
2c4104f0
LP		 1966 if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1967 goto finish;
1968
1969 if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1970 goto finish;
1971 }
1972 }
1973 }
1974
1975 r = 0;
1976
1977finish:
1978 free(path);
1979 free(fpath);
1980 free(name);
1981 closedir(d);
1982
1983 return r;
1984}
1985
94f04347
LP		 1986static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1987 [SERVICE_DEAD] = "dead",
1988 [SERVICE_START_PRE] = "start-pre",
1989 [SERVICE_START] = "start",
1990 [SERVICE_START_POST] = "start-post",
1991 [SERVICE_RUNNING] = "running",
80876c20 1992 [SERVICE_EXITED] = "exited",
94f04347
LP		 1993 [SERVICE_RELOAD] = "reload",
1994 [SERVICE_STOP] = "stop",
1995 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1996 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1997 [SERVICE_STOP_POST] = "stop-post",
1998 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1999 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2000 [SERVICE_MAINTAINANCE] = "maintainance",
2001 [SERVICE_AUTO_RESTART] = "auto-restart",
2002};
2003
2004DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2005
2006static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2007 [SERVICE_ONCE] = "once",
2008 [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
40531a55 2009 [SERVICE_RESTART_ALWAYS] = "restart-always",
94f04347
LP		 2010};
2011
2012DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2013
2014static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2015 [SERVICE_FORKING] = "forking",
2016 [SERVICE_SIMPLE] = "simple",
2017 [SERVICE_FINISH] = "finish"
2018};
2019
2020DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2021
e537352b 2022static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
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LP		 2023 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2024 [SERVICE_EXEC_START] = "ExecStart",
2025 [SERVICE_EXEC_START_POST] = "ExecStartPost",
2026 [SERVICE_EXEC_RELOAD] = "ExecReload",
2027 [SERVICE_EXEC_STOP] = "ExecStop",
2028 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2029};
2030
2031DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2032
87f0e418 2033const UnitVTable service_vtable = {
5cb5a6ff
LP		 2034 .suffix = ".service",
2035
034c6ed7 2036 .init = service_init,
e537352b 2037 .load = service_load,
034c6ed7
LP		 2038 .done = service_done,
2039
5cb5a6ff
LP		 2040 .dump = service_dump,
2041
2042 .start = service_start,
2043 .stop = service_stop,
2044 .reload = service_reload,
2045
034c6ed7
LP		 2046 .can_reload = service_can_reload,
2047
5cb5a6ff
LP		 2048 .active_state = service_active_state,
2049
034c6ed7
LP		 2050 .sigchld_event = service_sigchld_event,
2051 .timer_event = service_timer_event,
2c4104f0 2052
8e274523
LP		 2053 .cgroup_notify_empty = service_cgroup_notify_event,
2054
2c4104f0 2055 .enumerate = service_enumerate
5cb5a6ff 2056};
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