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[people/ms/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
243b1432
LP		 729static int service_verify(Service *s) {
730 assert(s);
731
732 if (UNIT(s)->meta.load_state != UNIT_LOADED)
733 return 0;
734
735 if (!s->exec_command[SERVICE_EXEC_START]) {
736 log_error("%s lacks ExecStart setting. Refusing.", unit_id(UNIT(s)));
737 return -EINVAL;
738 }
739
740 return 0;
741}
742
e537352b
LP		 743static int service_load(Unit *u) {
744 int r;
745 Service *s = SERVICE(u);
746
747 assert(s);
1e2e8133 748
5cb5a6ff 749 /* Load a .service file */
e537352b 750 if ((r = unit_load_fragment(u)) < 0)
5cb5a6ff
LP		 751 return r;
752
bd77d0fc 753 /* Load a classic init script as a fallback, if we couldn't find anything */
e537352b
LP		 754 if (u->meta.load_state == UNIT_STUB)
755 if ((r = service_load_sysv(s)) < 0)
23a177ef 756 return r;
d46de8a1 757
23a177ef 758 /* Still nothing found? Then let's give up */
e537352b 759 if (u->meta.load_state == UNIT_STUB)
23a177ef 760 return -ENOENT;
034c6ed7 761
23a177ef
LP		 762 /* We were able to load something, then let's add in the
763 * dropin directories. */
764 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
8e274523 765 return r;
23a177ef
LP		 766
767 /* This is a new unit? Then let's add in some extras */
e537352b 768 if (u->meta.load_state == UNIT_LOADED) {
23a177ef
LP		 769 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
770 return r;
771
772 if ((r = unit_add_default_cgroup(u)) < 0)
773 return r;
774
775 if ((r = sysv_chkconfig_order(s)) < 0)
776 return r;
8e274523
LP		 777 }
778
243b1432 779 return service_verify(s);
034c6ed7
LP		 780}
781
87f0e418 782static void service_dump(Unit *u, FILE *f, const char *prefix) {
5cb5a6ff 783
5cb5a6ff 784 ServiceExecCommand c;
87f0e418 785 Service *s = SERVICE(u);
47be870b
LP		 786 const char *prefix2;
787 char *p2;
5cb5a6ff
LP		 788
789 assert(s);
790
47be870b
LP		 791 p2 = strappend(prefix, "\t");
792 prefix2 = p2 ? p2 : prefix;
44d8db9e 793
5cb5a6ff 794 fprintf(f,
81a2b7ce
LP		 795 "%sService State: %s\n"
796 "%sPermissionsStartOnly: %s\n"
8e274523 797 "%sRootDirectoryStartOnly: %s\n"
03d6ab85 798 "%sValidNoProcess: %s\n"
50159e6a 799 "%sKillMode: %s\n"
03d6ab85 800 "%sType: %s\n",
81a2b7ce
LP		 801 prefix, service_state_to_string(s->state),
802 prefix, yes_no(s->permissions_start_only),
8e274523 803 prefix, yes_no(s->root_directory_start_only),
03d6ab85 804 prefix, yes_no(s->valid_no_process),
50159e6a 805 prefix, kill_mode_to_string(s->kill_mode),
03d6ab85 806 prefix, service_type_to_string(s->type));
5cb5a6ff 807
70123e68
LP		 808 if (s->control_pid > 0)
809 fprintf(f,
810 "%sControl PID: %llu\n",
811 prefix, (unsigned long long) s->control_pid);
812
813 if (s->main_pid > 0)
814 fprintf(f,
815 "%sMain PID: %llu\n",
816 prefix, (unsigned long long) s->main_pid);
817
034c6ed7
LP		 818 if (s->pid_file)
819 fprintf(f,
820 "%sPIDFile: %s\n",
821 prefix, s->pid_file);
822
5cb5a6ff
LP		 823 exec_context_dump(&s->exec_context, f, prefix);
824
e537352b 825 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
5cb5a6ff 826
44d8db9e
LP		 827 if (!s->exec_command[c])
828 continue;
829
830 fprintf(f, "%s→ %s:\n",
94f04347 831 prefix, service_exec_command_to_string(c));
44d8db9e
LP		 832
833 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 834 }
44d8db9e 835
2c4104f0
LP		 836 if (s->sysv_path)
837 fprintf(f,
23a177ef
LP		 838 "%sSysV Init Script Path: %s\n"
839 "%sSysV Init Script has LSB Header: %s\n",
840 prefix, s->sysv_path,
841 prefix, yes_no(s->sysv_has_lsb));
2c4104f0
LP		 842
843 if (s->sysv_start_priority >= 0)
844 fprintf(f,
23a177ef 845 "%sSysVStartPriority: %i\n",
2c4104f0
LP		 846 prefix, s->sysv_start_priority);
847
8309400a
LP		 848 if (s->sysv_runlevels)
849 fprintf(f, "%sSysVRunLevels: %s\n",
850 prefix, s->sysv_runlevels);
23a177ef 851
47be870b 852 free(p2);
5cb5a6ff
LP		 853}
854
034c6ed7
LP		 855static int service_load_pid_file(Service *s) {
856 char *k;
857 unsigned long p;
858 int r;
859
860 assert(s);
861
862 if (s->main_pid_known)
863 return 0;
864
5e94833f
LP		 865 assert(s->main_pid <= 0);
866
034c6ed7
LP		 867 if (!s->pid_file)
868 return -ENOENT;
869
870 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
871 return r;
872
873 if ((r = safe_atolu(k, &p)) < 0) {
874 free(k);
875 return r;
876 }
877
878 if ((unsigned long) (pid_t) p != p)
879 return -ERANGE;
880
b8c597d5
LP		 881 if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
882 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
883 (unsigned long long) p, s->pid_file);
884 return -ESRCH;
885 }
886
16f6025e
LP		 887 if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
888 /* FIXME: we need to do something here */
889 return r;
890
b8c597d5 891 s->main_pid = (pid_t) p;
034c6ed7
LP		 892 s->main_pid_known = true;
893
894 return 0;
895}
896
3e33402a
LP		 897static int service_get_sockets(Service *s, Set **_set) {
898 Set *set;
ceee3d82
LP		 899 Iterator i;
900 char *t;
3e33402a 901 int r;
ceee3d82
LP		 902
903 assert(s);
3e33402a
LP		 904 assert(_set);
905
906 /* Collects all Socket objects that belong to this
907 * service. Note that a service might have multiple sockets
908 * via multiple names. */
909
910 if (!(set = set_new(NULL, NULL)))
911 return -ENOMEM;
ceee3d82
LP		 912
913 SET_FOREACH(t, UNIT(s)->meta.names, i) {
914 char *k;
915 Unit *p;
916
917 /* Look for all socket objects that go by any of our
918 * units and collect their fds */
919
3e33402a
LP		 920 if (!(k = unit_name_change_suffix(t, ".socket"))) {
921 r = -ENOMEM;
922 goto fail;
923 }
ceee3d82
LP		 924
925 p = manager_get_unit(UNIT(s)->meta.manager, k);
926 free(k);
927
3e33402a 928 if (!p) continue;
ceee3d82 929
3e33402a
LP		 930 if ((r = set_put(set, p)) < 0)
931 goto fail;
ceee3d82
LP		 932 }
933
3e33402a
LP		 934 *_set = set;
935 return 0;
936
937fail:
938 set_free(set);
939 return r;
940}
941
942
e537352b 943static int service_notify_sockets_dead(Service *s) {
3e33402a
LP		 944 Iterator i;
945 Set *set;
47be870b 946 Socket *sock;
3e33402a
LP		 947 int r;
948
949 assert(s);
950
951 /* Notifies all our sockets when we die */
952
953 if ((r = service_get_sockets(s, &set)) < 0)
954 return r;
955
47be870b
LP		 956 SET_FOREACH(sock, set, i)
957 socket_notify_service_dead(sock);
3e33402a
LP		 958
959 set_free(set);
960
ceee3d82
LP		 961 return 0;
962}
963
034c6ed7
LP		 964static void service_set_state(Service *s, ServiceState state) {
965 ServiceState old_state;
5cb5a6ff
LP		 966 assert(s);
967
034c6ed7 968 old_state = s->state;
5cb5a6ff 969 s->state = state;
034c6ed7
LP		 970
971 if (state != SERVICE_START_PRE &&
972 state != SERVICE_START &&
973 state != SERVICE_START_POST &&
974 state != SERVICE_RELOAD &&
975 state != SERVICE_STOP &&
976 state != SERVICE_STOP_SIGTERM &&
977 state != SERVICE_STOP_SIGKILL &&
978 state != SERVICE_STOP_POST &&
979 state != SERVICE_FINAL_SIGTERM &&
980 state != SERVICE_FINAL_SIGKILL &&
981 state != SERVICE_AUTO_RESTART)
acbb0225 982 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7 983
7d55e835
LP		 984 if (state != SERVICE_START &&
985 state != SERVICE_START_POST &&
034c6ed7
LP		 986 state != SERVICE_RUNNING &&
987 state != SERVICE_RELOAD &&
988 state != SERVICE_STOP &&
989 state != SERVICE_STOP_SIGTERM &&
990 state != SERVICE_STOP_SIGKILL)
5e94833f 991 service_unwatch_main_pid(s);
034c6ed7
LP		 992
993 if (state != SERVICE_START_PRE &&
994 state != SERVICE_START &&
995 state != SERVICE_START_POST &&
996 state != SERVICE_RELOAD &&
997 state != SERVICE_STOP &&
998 state != SERVICE_STOP_SIGTERM &&
999 state != SERVICE_STOP_SIGKILL &&
1000 state != SERVICE_STOP_POST &&
1001 state != SERVICE_FINAL_SIGTERM &&
e537352b 1002 state != SERVICE_FINAL_SIGKILL) {
5e94833f 1003 service_unwatch_control_pid(s);
034c6ed7 1004 s->control_command = NULL;
e537352b 1005 }
034c6ed7 1006
ceee3d82
LP		 1007 if (state == SERVICE_DEAD ||
1008 state == SERVICE_STOP ||
1009 state == SERVICE_STOP_SIGTERM ||
1010 state == SERVICE_STOP_SIGKILL ||
1011 state == SERVICE_STOP_POST ||
1012 state == SERVICE_FINAL_SIGTERM ||
1013 state == SERVICE_FINAL_SIGKILL ||
1014 state == SERVICE_MAINTAINANCE ||
1015 state == SERVICE_AUTO_RESTART)
e537352b 1016 service_notify_sockets_dead(s);
ceee3d82 1017
e537352b
LP		 1018 if (old_state != state)
1019 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
acbb0225
LP		 1020
1021 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
034c6ed7
LP		 1022}
1023
44d8db9e
LP		 1024static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1025 Iterator i;
1026 int r;
1027 int *rfds = NULL;
1028 unsigned rn_fds = 0;
3e33402a 1029 Set *set;
47be870b 1030 Socket *sock;
44d8db9e
LP		 1031
1032 assert(s);
1033 assert(fds);
1034 assert(n_fds);
1035
3e33402a
LP		 1036 if ((r = service_get_sockets(s, &set)) < 0)
1037 return r;
1038
47be870b 1039 SET_FOREACH(sock, set, i) {
44d8db9e
LP		 1040 int *cfds;
1041 unsigned cn_fds;
1042
47be870b 1043 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
44d8db9e
LP		 1044 goto fail;
1045
1046 if (!cfds)
1047 continue;
1048
1049 if (!rfds) {
1050 rfds = cfds;
1051 rn_fds = cn_fds;
1052 } else {
1053 int *t;
1054
1055 if (!(t = new(int, rn_fds+cn_fds))) {
1056 free(cfds);
1057 r = -ENOMEM;
1058 goto fail;
1059 }
1060
1061 memcpy(t, rfds, rn_fds);
1062 memcpy(t+rn_fds, cfds, cn_fds);
1063 free(rfds);
1064 free(cfds);
1065
1066 rfds = t;
1067 rn_fds = rn_fds+cn_fds;
1068 }
1069 }
1070
1071 *fds = rfds;
1072 *n_fds = rn_fds;
3e33402a
LP		 1073
1074 set_free(set);
1075
44d8db9e
LP		 1076 return 0;
1077
1078fail:
3e33402a 1079 set_free(set);
44d8db9e 1080 free(rfds);
3e33402a 1081
44d8db9e
LP		 1082 return r;
1083}
1084
81a2b7ce
LP		 1085static int service_spawn(
1086 Service *s,
1087 ExecCommand *c,
1088 bool timeout,
1089 bool pass_fds,
1090 bool apply_permissions,
1091 bool apply_chroot,
1092 pid_t *_pid) {
1093
034c6ed7
LP		 1094 pid_t pid;
1095 int r;
44d8db9e
LP		 1096 int *fds = NULL;
1097 unsigned n_fds = 0;
034c6ed7
LP		 1098
1099 assert(s);
1100 assert(c);
1101 assert(_pid);
1102
44d8db9e
LP		 1103 if (pass_fds)
1104 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1105 goto fail;
1106
034c6ed7 1107 if (timeout) {
acbb0225 1108 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
034c6ed7
LP		 1109 goto fail;
1110 } else
acbb0225 1111 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7 1112
81a2b7ce
LP		 1113 if ((r = exec_spawn(c,
1114 &s->exec_context,
1115 fds, n_fds,
1116 apply_permissions,
1117 apply_chroot,
80876c20 1118 UNIT(s)->meta.manager->confirm_spawn,
8e274523 1119 UNIT(s)->meta.cgroup_bondings,
81a2b7ce 1120 &pid)) < 0)
034c6ed7
LP		 1121 goto fail;
1122
87f0e418 1123 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
034c6ed7
LP		 1124 /* FIXME: we need to do something here */
1125 goto fail;
1126
44d8db9e 1127 free(fds);
034c6ed7
LP		 1128 *_pid = pid;
1129
5cb5a6ff 1130 return 0;
034c6ed7
LP		 1131
1132fail:
44d8db9e
LP		 1133 free(fds);
1134
034c6ed7 1135 if (timeout)
acbb0225 1136 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7
LP		 1137
1138 return r;
1139}
1140
80876c20
LP		 1141static int main_pid_good(Service *s) {
1142 assert(s);
1143
1144 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1145 * don't know */
1146
1147 /* If we know the pid file, then lets just check if it is
1148 * still valid */
1149 if (s->main_pid_known)
1150 return s->main_pid > 0;
1151
1152 /* We don't know the pid */
1153 return -EAGAIN;
1154}
1155
1156static int control_pid_good(Service *s) {
1157 assert(s);
1158
1159 return s->control_pid > 0;
1160}
1161
1162static int cgroup_good(Service *s) {
1163 int r;
1164
1165 assert(s);
1166
1167 if (s->valid_no_process)
1168 return -EAGAIN;
1169
1170 if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1171 return r;
1172
1173 return !r;
1174}
1175
034c6ed7
LP		 1176static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1177 int r;
1178 assert(s);
1179
1180 if (!success)
1181 s->failure = true;
1182
1183 if (allow_restart &&
1184 (s->restart == SERVICE_RESTART_ALWAYS ||
1185 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1186
acbb0225 1187 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
034c6ed7
LP		 1188 goto fail;
1189
1190 service_set_state(s, SERVICE_AUTO_RESTART);
1191 } else
1192 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1193
1194 return;
1195
1196fail:
87f0e418 1197 log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1198 service_enter_dead(s, false, false);
1199}
1200
1201static void service_enter_signal(Service *s, ServiceState state, bool success);
1202
1203static void service_enter_stop_post(Service *s, bool success) {
1204 int r;
1205 assert(s);
1206
1207 if (!success)
1208 s->failure = true;
1209
5e94833f
LP		 1210 service_unwatch_control_pid(s);
1211
80876c20 1212 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
81a2b7ce
LP		 1213 if ((r = service_spawn(s,
1214 s->control_command,
1215 true,
1216 false,
1217 !s->permissions_start_only,
1218 !s->root_directory_start_only,
1219 &s->control_pid)) < 0)
034c6ed7
LP		 1220 goto fail;
1221
d6ea93e3 1222
80876c20
LP		 1223 service_set_state(s, SERVICE_STOP_POST);
1224 } else
1225 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
034c6ed7
LP		 1226
1227 return;
1228
1229fail:
80876c20 1230 log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1231 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1232}
1233
1234static void service_enter_signal(Service *s, ServiceState state, bool success) {
1235 int r;
1236 bool sent = false;
1237
1238 assert(s);
1239
1240 if (!success)
1241 s->failure = true;
1242
80876c20
LP		 1243 if (s->kill_mode != KILL_NONE) {
1244 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
034c6ed7 1245
50159e6a 1246 if (s->kill_mode == KILL_CONTROL_GROUP) {
034c6ed7 1247
50159e6a
LP		 1248 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1249 if (r != -EAGAIN && r != -ESRCH)
1250 goto fail;
1251 } else
034c6ed7
LP		 1252 sent = true;
1253 }
1254
50159e6a
LP		 1255 if (!sent) {
1256 r = 0;
80876c20 1257
50159e6a
LP		 1258 if (s->main_pid > 0) {
1259 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1260 r = -errno;
1261 else
1262 sent = true;
1263 }
1264
1265 if (s->control_pid > 0) {
1266 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1267 r = -errno;
1268 else
1269 sent = true;
1270 }
1271
1272 if (r < 0)
1273 goto fail;
1274 }
d6ea93e3 1275 }
034c6ed7 1276
80876c20
LP		 1277 if (sent) {
1278 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1279 goto fail;
d6ea93e3 1280
80876c20
LP		 1281 service_set_state(s, state);
1282 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1283 service_enter_stop_post(s, true);
1284 else
034c6ed7
LP		 1285 service_enter_dead(s, true, true);
1286
1287 return;
1288
1289fail:
87f0e418 1290 log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7 1291
80876c20 1292 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
034c6ed7
LP		 1293 service_enter_stop_post(s, false);
1294 else
1295 service_enter_dead(s, false, true);
1296}
1297
1298static void service_enter_stop(Service *s, bool success) {
1299 int r;
1300 assert(s);
1301
1302 if (!success)
1303 s->failure = true;
1304
5e94833f
LP		 1305 service_unwatch_control_pid(s);
1306
80876c20 1307 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
81a2b7ce
LP		 1308 if ((r = service_spawn(s,
1309 s->control_command,
1310 true,
1311 false,
1312 !s->permissions_start_only,
1313 !s->root_directory_start_only,
1314 &s->control_pid)) < 0)
034c6ed7
LP		 1315 goto fail;
1316
80876c20
LP		 1317 service_set_state(s, SERVICE_STOP);
1318 } else
034c6ed7
LP		 1319 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1320
1321 return;
1322
1323fail:
87f0e418 1324 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1325 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1326}
1327
80876c20
LP		 1328static void service_enter_running(Service *s, bool success) {
1329 assert(s);
1330
1331 if (!success)
1332 s->failure = true;
1333
1334 if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1335 service_set_state(s, SERVICE_RUNNING);
1336 else if (s->valid_no_process)
1337 service_set_state(s, SERVICE_EXITED);
1338 else
1339 service_enter_stop(s, true);
1340}
1341
034c6ed7
LP		 1342static void service_enter_start_post(Service *s) {
1343 int r;
1344 assert(s);
1345
5e94833f
LP		 1346 service_unwatch_control_pid(s);
1347
80876c20 1348 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
81a2b7ce
LP		 1349 if ((r = service_spawn(s,
1350 s->control_command,
1351 true,
1352 false,
1353 !s->permissions_start_only,
1354 !s->root_directory_start_only,
1355 &s->control_pid)) < 0)
034c6ed7
LP		 1356 goto fail;
1357
d6ea93e3 1358
80876c20
LP		 1359 service_set_state(s, SERVICE_START_POST);
1360 } else
1361 service_enter_running(s, true);
034c6ed7
LP		 1362
1363 return;
1364
1365fail:
87f0e418 1366 log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1367 service_enter_stop(s, false);
1368}
1369
1370static void service_enter_start(Service *s) {
1371 pid_t pid;
1372 int r;
1373
1374 assert(s);
1375
1376 assert(s->exec_command[SERVICE_EXEC_START]);
1377 assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1378
80876c20
LP		 1379 if (s->type == SERVICE_FORKING)
1380 service_unwatch_control_pid(s);
1381 else
1382 service_unwatch_main_pid(s);
1383
81a2b7ce
LP		 1384 if ((r = service_spawn(s,
1385 s->exec_command[SERVICE_EXEC_START],
1386 s->type == SERVICE_FORKING,
1387 true,
1388 true,
1389 true,
1390 &pid)) < 0)
034c6ed7
LP		 1391 goto fail;
1392
1393 if (s->type == SERVICE_SIMPLE) {
1394 /* For simple services we immediately start
1395 * the START_POST binaries. */
1396
1397 s->main_pid = pid;
1398 s->main_pid_known = true;
80876c20 1399
034c6ed7
LP		 1400 service_enter_start_post(s);
1401
1402 } else if (s->type == SERVICE_FORKING) {
1403
1404 /* For forking services we wait until the start
1405 * process exited. */
1406
1407 s->control_pid = pid;
80876c20 1408
034c6ed7 1409 s->control_command = s->exec_command[SERVICE_EXEC_START];
80876c20
LP		 1410 service_set_state(s, SERVICE_START);
1411
7d55e835
LP		 1412 } else if (s->type == SERVICE_FINISH) {
1413
1414 /* For finishing services we wait until the start
1415 * process exited, too, but it is our main process. */
1416
1417 s->main_pid = pid;
5e94833f 1418 s->main_pid_known = true;
80876c20 1419
7d55e835 1420 s->control_command = s->exec_command[SERVICE_EXEC_START];
80876c20 1421 service_set_state(s, SERVICE_START);
034c6ed7
LP		 1422 } else
1423 assert_not_reached("Unknown service type");
1424
1425 return;
1426
1427fail:
87f0e418 1428 log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
80876c20 1429 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
034c6ed7
LP		 1430}
1431
1432static void service_enter_start_pre(Service *s) {
1433 int r;
1434
1435 assert(s);
1436
5e94833f
LP		 1437 service_unwatch_control_pid(s);
1438
80876c20 1439 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
81a2b7ce
LP		 1440 if ((r = service_spawn(s,
1441 s->control_command,
1442 true,
1443 false,
1444 !s->permissions_start_only,
1445 !s->root_directory_start_only,
1446 &s->control_pid)) < 0)
034c6ed7
LP		 1447 goto fail;
1448
80876c20
LP		 1449 service_set_state(s, SERVICE_START_PRE);
1450 } else
034c6ed7
LP		 1451 service_enter_start(s);
1452
1453 return;
1454
1455fail:
87f0e418 1456 log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1457 service_enter_dead(s, false, true);
1458}
1459
1460static void service_enter_restart(Service *s) {
1461 int r;
1462 assert(s);
1463
87f0e418 1464 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
034c6ed7
LP		 1465 goto fail;
1466
87f0e418 1467 log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
034c6ed7
LP		 1468 service_enter_dead(s, true, false);
1469 return;
1470
1471fail:
1472
87f0e418 1473 log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1474 service_enter_dead(s, false, false);
1475}
1476
1477static void service_enter_reload(Service *s) {
1478 int r;
1479
1480 assert(s);
1481
5e94833f
LP		 1482 service_unwatch_control_pid(s);
1483
80876c20 1484 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
81a2b7ce
LP		 1485 if ((r = service_spawn(s,
1486 s->control_command,
1487 true,
1488 false,
1489 !s->permissions_start_only,
1490 !s->root_directory_start_only,
1491 &s->control_pid)) < 0)
034c6ed7
LP		 1492 goto fail;
1493
80876c20
LP		 1494 service_set_state(s, SERVICE_RELOAD);
1495 } else
1496 service_enter_running(s, true);
034c6ed7
LP		 1497
1498 return;
1499
1500fail:
87f0e418 1501 log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1502 service_enter_stop(s, false);
1503}
1504
1505static void service_run_next(Service *s, bool success) {
1506 int r;
1507
1508 assert(s);
1509 assert(s->control_command);
1510 assert(s->control_command->command_next);
1511
1512 if (!success)
1513 s->failure = true;
1514
1515 s->control_command = s->control_command->command_next;
1516
5e94833f
LP		 1517 service_unwatch_control_pid(s);
1518
81a2b7ce
LP		 1519 if ((r = service_spawn(s,
1520 s->control_command,
1521 true,
1522 false,
1523 !s->permissions_start_only,
1524 !s->root_directory_start_only,
1525 &s->control_pid)) < 0)
034c6ed7
LP		 1526 goto fail;
1527
1528 return;
1529
1530fail:
87f0e418 1531 log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7 1532
80876c20
LP		 1533 if (s->state == SERVICE_START_PRE)
1534 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1535 else if (s->state == SERVICE_STOP)
1536 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
034c6ed7
LP		 1537 else if (s->state == SERVICE_STOP_POST)
1538 service_enter_dead(s, false, true);
1539 else
1540 service_enter_stop(s, false);
5cb5a6ff
LP		 1541}
1542
87f0e418
LP		 1543static int service_start(Unit *u) {
1544 Service *s = SERVICE(u);
5cb5a6ff
LP		 1545
1546 assert(s);
1547
034c6ed7
LP		 1548 /* We cannot fulfill this request right now, try again later
1549 * please! */
1550 if (s->state == SERVICE_STOP ||
1551 s->state == SERVICE_STOP_SIGTERM ||
1552 s->state == SERVICE_STOP_SIGKILL ||
1553 s->state == SERVICE_STOP_POST ||
1554 s->state == SERVICE_FINAL_SIGTERM ||
1555 s->state == SERVICE_FINAL_SIGKILL)
5cb5a6ff
LP		 1556 return -EAGAIN;
1557
034c6ed7
LP		 1558 /* Already on it! */
1559 if (s->state == SERVICE_START_PRE ||
1560 s->state == SERVICE_START ||
1561 s->state == SERVICE_START_POST)
1562 return 0;
1563
1564 assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
5cb5a6ff 1565
1e2e8133
LP		 1566 /* Make sure we don't enter a busy loop of some kind. */
1567 if (!ratelimit_test(&s->ratelimit)) {
1568 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1569 return -EAGAIN;
1570 }
1571
034c6ed7
LP		 1572 s->failure = false;
1573 s->main_pid_known = false;
1574
1575 service_enter_start_pre(s);
1576 return 0;
5cb5a6ff
LP		 1577}
1578
87f0e418
LP		 1579static int service_stop(Unit *u) {
1580 Service *s = SERVICE(u);
5cb5a6ff
LP		 1581
1582 assert(s);
1583
e537352b 1584 /* Cannot do this now */
034c6ed7
LP		 1585 if (s->state == SERVICE_START_PRE ||
1586 s->state == SERVICE_START ||
1587 s->state == SERVICE_START_POST ||
1588 s->state == SERVICE_RELOAD)
1589 return -EAGAIN;
1590
e537352b
LP		 1591 /* Already on it */
1592 if (s->state == SERVICE_STOP ||
1593 s->state == SERVICE_STOP_SIGTERM ||
1594 s->state == SERVICE_STOP_SIGKILL ||
1595 s->state == SERVICE_STOP_POST ||
1596 s->state == SERVICE_FINAL_SIGTERM ||
1597 s->state == SERVICE_FINAL_SIGKILL)
1598 return 0;
1599
034c6ed7
LP		 1600 if (s->state == SERVICE_AUTO_RESTART) {
1601 service_set_state(s, SERVICE_DEAD);
1602 return 0;
1603 }
1604
80876c20 1605 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
5cb5a6ff 1606
034c6ed7 1607 service_enter_stop(s, true);
5cb5a6ff
LP		 1608 return 0;
1609}
1610
87f0e418
LP		 1611static int service_reload(Unit *u) {
1612 Service *s = SERVICE(u);
034c6ed7
LP		 1613
1614 assert(s);
1615
80876c20 1616 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
034c6ed7
LP		 1617
1618 service_enter_reload(s);
5cb5a6ff
LP		 1619 return 0;
1620}
1621
87f0e418
LP		 1622static bool service_can_reload(Unit *u) {
1623 Service *s = SERVICE(u);
034c6ed7
LP		 1624
1625 assert(s);
1626
1627 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1628}
1629
87f0e418
LP		 1630static UnitActiveState service_active_state(Unit *u) {
1631 assert(u);
5cb5a6ff 1632
acbb0225 1633 return state_translation_table[SERVICE(u)->state];
034c6ed7
LP		 1634}
1635
87f0e418
LP		 1636static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1637 Service *s = SERVICE(u);
034c6ed7 1638 bool success;
5cb5a6ff
LP		 1639
1640 assert(s);
034c6ed7
LP		 1641 assert(pid >= 0);
1642
bd982a8b 1643 success = code == CLD_EXITED && status == 0;
034c6ed7
LP		 1644 s->failure = s->failure || !success;
1645
1646 if (s->main_pid == pid) {
1647
1648 exec_status_fill(&s->main_exec_status, pid, code, status);
1649 s->main_pid = 0;
1650
7d55e835 1651 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
034c6ed7
LP		 1652 assert(s->exec_command[SERVICE_EXEC_START]);
1653 s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1654 }
1655
50159e6a 1656 log_debug("%s: main process exited, code=%s, status=%i", unit_id(u), sigchld_code_to_string(code), status);
034c6ed7
LP		 1657
1658 /* The service exited, so the service is officially
1659 * gone. */
1660
1661 switch (s->state) {
1662
1663 case SERVICE_START_POST:
1664 case SERVICE_RELOAD:
1665 case SERVICE_STOP:
1666 /* Need to wait until the operation is
1667 * done */
1668 break;
1669
7d55e835
LP		 1670 case SERVICE_START:
1671 assert(s->type == SERVICE_FINISH);
1672
1673 /* This was our main goal, so let's go on */
1674 if (success)
1675 service_enter_start_post(s);
1676 else
80876c20 1677 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
7d55e835
LP		 1678 break;
1679
034c6ed7 1680 case SERVICE_RUNNING:
80876c20 1681 service_enter_running(s, success);
034c6ed7
LP		 1682 break;
1683
1684 case SERVICE_STOP_SIGTERM:
1685 case SERVICE_STOP_SIGKILL:
1686
1687 if (!control_pid_good(s))
1688 service_enter_stop_post(s, success);
5cb5a6ff 1689
034c6ed7
LP		 1690 /* If there is still a control process, wait for that first */
1691 break;
5cb5a6ff 1692
034c6ed7
LP		 1693 default:
1694 assert_not_reached("Uh, main process died at wrong time.");
1695 }
5cb5a6ff 1696
034c6ed7
LP		 1697 } else if (s->control_pid == pid) {
1698 assert(s->control_command);
1699
1700 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1701 s->control_pid = 0;
1702
94f04347 1703 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
034c6ed7
LP		 1704
1705 /* If we are shutting things down anyway we
1706 * don't care about failing commands. */
1707
80876c20 1708 if (s->control_command->command_next && success) {
034c6ed7
LP		 1709
1710 /* There is another command to *
1711 * execute, so let's do that. */
1712
80876c20 1713 log_debug("%s running next command for state %s", unit_id(u), service_state_to_string(s->state));
034c6ed7
LP		 1714 service_run_next(s, success);
1715
80876c20 1716 } else {
034c6ed7
LP		 1717 /* No further commands for this step, so let's
1718 * figure out what to do next */
1719
94f04347 1720 log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
bd982a8b 1721
034c6ed7
LP		 1722 switch (s->state) {
1723
1724 case SERVICE_START_PRE:
1725 if (success)
1726 service_enter_start(s);
1727 else
80876c20 1728 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
034c6ed7
LP		 1729 break;
1730
1731 case SERVICE_START:
1732 assert(s->type == SERVICE_FORKING);
1733
1734 /* Let's try to load the pid
1735 * file here if we can. We
1736 * ignore the return value,
1737 * since the PID file might
1738 * actually be created by a
1739 * START_POST script */
1740
1741 if (success) {
1742 if (s->pid_file)
1743 service_load_pid_file(s);
1744
1745 service_enter_start_post(s);
1746 } else
80876c20 1747 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
034c6ed7
LP		 1748
1749 break;
1750
1751 case SERVICE_START_POST:
1752 if (success && s->pid_file && !s->main_pid_known) {
1753 int r;
1754
1755 /* Hmm, let's see if we can
1756 * load the pid now after the
1757 * start-post scripts got
1758 * executed. */
1759
1760 if ((r = service_load_pid_file(s)) < 0)
87f0e418 1761 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
034c6ed7
LP		 1762 }
1763
1764 /* Fall through */
1765
1766 case SERVICE_RELOAD:
80876c20
LP		 1767 if (success)
1768 service_enter_running(s, true);
1769 else
034c6ed7
LP		 1770 service_enter_stop(s, false);
1771
1772 break;
1773
1774 case SERVICE_STOP:
80876c20 1775 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
034c6ed7
LP		 1776 break;
1777
1778 case SERVICE_STOP_SIGTERM:
1779 case SERVICE_STOP_SIGKILL:
1780 if (main_pid_good(s) <= 0)
1781 service_enter_stop_post(s, success);
1782
1783 /* If there is still a service
1784 * process around, wait until
1785 * that one quit, too */
1786 break;
1787
1788 case SERVICE_STOP_POST:
1789 case SERVICE_FINAL_SIGTERM:
1790 case SERVICE_FINAL_SIGKILL:
1791 service_enter_dead(s, success, true);
1792 break;
1793
1794 default:
1795 assert_not_reached("Uh, control process died at wrong time.");
1796 }
1797 }
1798 } else
1799 assert_not_reached("Got SIGCHLD for unkown PID");
1800}
1801
acbb0225 1802static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
87f0e418 1803 Service *s = SERVICE(u);
034c6ed7
LP		 1804
1805 assert(s);
1806 assert(elapsed == 1);
1807
acbb0225 1808 assert(w == &s->timer_watch);
034c6ed7
LP		 1809
1810 switch (s->state) {
1811
1812 case SERVICE_START_PRE:
1813 case SERVICE_START:
80876c20
LP		 1814 log_warning("%s operation timed out. Terminating.", unit_id(u));
1815 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1816 break;
1817
034c6ed7
LP		 1818 case SERVICE_START_POST:
1819 case SERVICE_RELOAD:
87f0e418 1820 log_warning("%s operation timed out. Stopping.", unit_id(u));
034c6ed7
LP		 1821 service_enter_stop(s, false);
1822 break;
1823
1824 case SERVICE_STOP:
87f0e418 1825 log_warning("%s stopping timed out. Terminating.", unit_id(u));
034c6ed7
LP		 1826 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1827 break;
1828
1829 case SERVICE_STOP_SIGTERM:
87f0e418 1830 log_warning("%s stopping timed out. Killing.", unit_id(u));
034c6ed7
LP		 1831 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1832 break;
1833
1834 case SERVICE_STOP_SIGKILL:
1835 /* Uh, wie sent a SIGKILL and it is still not gone?
1836 * Must be something we cannot kill, so let's just be
1837 * weirded out and continue */
1838
87f0e418 1839 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
034c6ed7
LP		 1840 service_enter_stop_post(s, false);
1841 break;
1842
1843 case SERVICE_STOP_POST:
87f0e418 1844 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
034c6ed7
LP		 1845 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1846 break;
1847
1848 case SERVICE_FINAL_SIGTERM:
87f0e418 1849 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
034c6ed7
LP		 1850 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1851 break;
1852
1853 case SERVICE_FINAL_SIGKILL:
87f0e418 1854 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
034c6ed7
LP		 1855 service_enter_dead(s, false, true);
1856 break;
1857
1858 case SERVICE_AUTO_RESTART:
87f0e418 1859 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
034c6ed7
LP		 1860 service_enter_restart(s);
1861 break;
1862
1863 default:
1864 assert_not_reached("Timeout at wrong time.");
1865 }
5cb5a6ff
LP		 1866}
1867
8e274523
LP		 1868static void service_cgroup_notify_event(Unit *u) {
1869 Service *s = SERVICE(u);
1870
1871 assert(u);
1872
1873 log_debug("%s: cgroup is empty", unit_id(u));
1874
1875 switch (s->state) {
1876
1877 /* Waiting for SIGCHLD is usually more interesting,
1878 * because it includes return codes/signals. Which is
1879 * why we ignore the cgroup events for most cases,
1880 * except when we don't know pid which to expect the
1881 * SIGCHLD for. */
1882
1883 case SERVICE_RUNNING:
80876c20 1884 service_enter_running(s, true);
8e274523
LP		 1885 break;
1886
1887 default:
1888 ;
1889 }
1890}
1891
2c4104f0 1892static int service_enumerate(Manager *m) {
2c4104f0
LP		 1893 char **p;
1894 unsigned i;
1895 DIR *d = NULL;
1896 char *path = NULL, *fpath = NULL, *name = NULL;
1897 int r;
1898
1899 assert(m);
1900
5e177ece 1901 STRV_FOREACH(p, m->sysvrcnd_path)
23a177ef 1902 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
2c4104f0
LP		 1903 struct dirent *de;
1904
1905 free(path);
1906 path = NULL;
23a177ef 1907 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
2c4104f0
LP		 1908 r = -ENOMEM;
1909 goto finish;
1910 }
1911
1912 if (d)
1913 closedir(d);
1914
1915 if (!(d = opendir(path))) {
1916 if (errno != ENOENT)
1917 log_warning("opendir() failed on %s: %s", path, strerror(errno));
1918
1919 continue;
1920 }
1921
1922 while ((de = readdir(d))) {
1923 Unit *runlevel, *service;
1924
1925 if (ignore_file(de->d_name))
1926 continue;
1927
1928 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1929 continue;
1930
1931 if (strlen(de->d_name) < 4)
1932 continue;
1933
1934 free(fpath);
1935 fpath = NULL;
23a177ef 1936 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
2c4104f0
LP		 1937 r = -ENOMEM;
1938 goto finish;
1939 }
1940
1941 if (access(fpath, X_OK) < 0) {
1942
1943 if (errno != ENOENT)
1944 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1945
1946 continue;
1947 }
1948
1949 free(name);
1950 name = NULL;
1951 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1952 r = -ENOMEM;
1953 goto finish;
1954 }
1955
1956 if ((r = manager_load_unit(m, name, &service)) < 0)
1957 goto finish;
1958
23a177ef 1959 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
2c4104f0
LP		 1960 goto finish;
1961
1962 if (de->d_name[0] == 'S') {
1963 if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1964 goto finish;
1965
1966 if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1967 goto finish;
23a177ef
LP		 1968
1969 } else if (de->d_name[0] == 'K' &&
1970 (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1971 streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1972
1973 /* We honour K links only for
1974 * halt/reboot. For the normal
1975 * runlevels we assume the
1976 * stop jobs will be
1977 * implicitly added by the
1978 * core logic. */
1979
2c4104f0
LP		 1980 if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1981 goto finish;
1982
1983 if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1984 goto finish;
1985 }
1986 }
1987 }
1988
1989 r = 0;
1990
1991finish:
1992 free(path);
1993 free(fpath);
1994 free(name);
1995 closedir(d);
1996
1997 return r;
1998}
1999
94f04347
LP		 2000static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2001 [SERVICE_DEAD] = "dead",
2002 [SERVICE_START_PRE] = "start-pre",
2003 [SERVICE_START] = "start",
2004 [SERVICE_START_POST] = "start-post",
2005 [SERVICE_RUNNING] = "running",
80876c20 2006 [SERVICE_EXITED] = "exited",
94f04347
LP		 2007 [SERVICE_RELOAD] = "reload",
2008 [SERVICE_STOP] = "stop",
2009 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2010 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2011 [SERVICE_STOP_POST] = "stop-post",
2012 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2013 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2014 [SERVICE_MAINTAINANCE] = "maintainance",
2015 [SERVICE_AUTO_RESTART] = "auto-restart",
2016};
2017
2018DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2019
2020static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2021 [SERVICE_ONCE] = "once",
2022 [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
40531a55 2023 [SERVICE_RESTART_ALWAYS] = "restart-always",
94f04347
LP		 2024};
2025
2026DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2027
2028static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2029 [SERVICE_FORKING] = "forking",
2030 [SERVICE_SIMPLE] = "simple",
2031 [SERVICE_FINISH] = "finish"
2032};
2033
2034DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2035
e537352b 2036static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
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LP		 2037 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2038 [SERVICE_EXEC_START] = "ExecStart",
2039 [SERVICE_EXEC_START_POST] = "ExecStartPost",
2040 [SERVICE_EXEC_RELOAD] = "ExecReload",
2041 [SERVICE_EXEC_STOP] = "ExecStop",
2042 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2043};
2044
2045DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2046
87f0e418 2047const UnitVTable service_vtable = {
5cb5a6ff
LP		 2048 .suffix = ".service",
2049
034c6ed7 2050 .init = service_init,
e537352b 2051 .load = service_load,
034c6ed7
LP		 2052 .done = service_done,
2053
5cb5a6ff
LP		 2054 .dump = service_dump,
2055
2056 .start = service_start,
2057 .stop = service_stop,
2058 .reload = service_reload,
2059
034c6ed7
LP		 2060 .can_reload = service_can_reload,
2061
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LP		 2062 .active_state = service_active_state,
2063
034c6ed7
LP		 2064 .sigchld_event = service_sigchld_event,
2065 .timer_event = service_timer_event,
2c4104f0 2066
8e274523
LP		 2067 .cgroup_notify_empty = service_cgroup_notify_event,
2068
2c4104f0 2069 .enumerate = service_enumerate
5cb5a6ff 2070};
Michael's branch of systemd.