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manager: instead of using siginfo_t when reading SIGCHLD PIDs, run waitid() twice...
[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,
55 [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
56 [SERVICE_STOP] = UNIT_DEACTIVATING,
57 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
58 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
59 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
60 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
61 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
62 [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
63 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
034c6ed7 64};
5cb5a6ff 65
5e94833f
LP		 66static void service_unwatch_control_pid(Service *s) {
67 assert(s);
68
69 if (s->control_pid <= 0)
70 return;
71
72 unit_unwatch_pid(UNIT(s), s->control_pid);
73 s->control_pid = 0;
74}
75
76static void service_unwatch_main_pid(Service *s) {
77 assert(s);
78
79 if (s->main_pid <= 0)
80 return;
81
82 unit_unwatch_pid(UNIT(s), s->main_pid);
83 s->main_pid = 0;
84}
85
87f0e418
LP		 86static void service_done(Unit *u) {
87 Service *s = SERVICE(u);
44d8db9e
LP		 88
89 assert(s);
90
91 free(s->pid_file);
92 s->pid_file = NULL;
93
2c4104f0
LP		 94 free(s->sysv_path);
95 s->sysv_path = NULL;
96
8309400a
LP		 97 free(s->sysv_runlevels);
98 s->sysv_runlevels = NULL;
99
44d8db9e 100 exec_context_done(&s->exec_context);
e537352b 101 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
44d8db9e
LP		 102 s->control_command = NULL;
103
104 /* This will leak a process, but at least no memory or any of
105 * our resources */
5e94833f
LP		 106 service_unwatch_main_pid(s);
107 service_unwatch_control_pid(s);
44d8db9e 108
acbb0225 109 unit_unwatch_timer(u, &s->timer_watch);
44d8db9e
LP		 110}
111
2c4104f0
LP		 112static int sysv_translate_name(const char *name, char **_r) {
113
114 static const char * const table[] = {
115 "$local_fs", SPECIAL_LOCAL_FS_TARGET,
116 "$network", SPECIAL_NETWORK_TARGET,
117 "$named", SPECIAL_NSS_LOOKUP_TARGET,
118 "$portmap", SPECIAL_RPCBIND_TARGET,
119 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
120 "$syslog", SPECIAL_SYSLOG_TARGET,
121 "$time", SPECIAL_RTC_SET_TARGET
122 };
123
124 unsigned i;
125 char *r;
126
127 for (i = 0; i < ELEMENTSOF(table); i += 2)
128 if (streq(table[i], name)) {
129 if (!(r = strdup(table[i+1])))
130 return -ENOMEM;
131
132 goto finish;
133 }
134
135 if (*name == '$')
136 return 0;
137
138 if (asprintf(&r, "%s.service", name) < 0)
139 return -ENOMEM;
140
141finish:
142
143 if (_r)
144 *_r = r;
145
146 return 1;
147}
148
149static int sysv_chkconfig_order(Service *s) {
150 Meta *other;
151 int r;
152
153 assert(s);
154
155 if (s->sysv_start_priority < 0)
156 return 0;
157
23a177ef
LP		 158 /* For each pair of services where at least one lacks a LSB
159 * header, we use the start priority value to order things. */
2c4104f0
LP		 160
161 LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
162 Service *t;
163 UnitDependency d;
164
165 t = (Service*) other;
166
167 if (s == t)
168 continue;
169
170 if (t->sysv_start_priority < 0)
171 continue;
172
51a1a79d
LP		 173 /* If both units have modern headers we don't care
174 * about the priorities */
175 if ((!s->sysv_path || s->sysv_has_lsb) &&
176 (!t->sysv_path || t->sysv_has_lsb))
23a177ef
LP		 177 continue;
178
2c4104f0
LP		 179 if (t->sysv_start_priority < s->sysv_start_priority)
180 d = UNIT_AFTER;
181 else if (t->sysv_start_priority > s->sysv_start_priority)
182 d = UNIT_BEFORE;
183 else
184 continue;
185
186 /* FIXME: Maybe we should compare the name here lexicographically? */
187
188 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
189 return r;
190 }
191
192 return 0;
193}
194
195static ExecCommand *exec_command_new(const char *path, const char *arg1) {
196 ExecCommand *c;
197
198 if (!(c = new0(ExecCommand, 1)))
199 return NULL;
200
201 if (!(c->path = strdup(path))) {
202 free(c);
203 return NULL;
204 }
205
206 if (!(c->argv = strv_new(path, arg1, NULL))) {
207 free(c->path);
208 free(c);
209 return NULL;
210 }
211
212 return c;
213}
214
215static int sysv_exec_commands(Service *s) {
216 ExecCommand *c;
217
218 assert(s);
219 assert(s->sysv_path);
220
221 if (!(c = exec_command_new(s->sysv_path, "start")))
222 return -ENOMEM;
223 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
224
225 if (!(c = exec_command_new(s->sysv_path, "stop")))
226 return -ENOMEM;
227 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
228
229 if (!(c = exec_command_new(s->sysv_path, "reload")))
230 return -ENOMEM;
231 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
232
233 return 0;
234}
235
23a177ef
LP		 236static int priority_from_rcd(Service *s, const char *init_script) {
237 char **p;
238 unsigned i;
239
061978fa 240 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
23a177ef
LP		 241 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
242 char *path;
243 DIR *d;
244 struct dirent *de;
245
246 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
247 return -ENOMEM;
248
249 d = opendir(path);
250 free(path);
251
252 if (!d) {
253 if (errno != ENOENT)
254 log_warning("opendir() failed on %s: %s", path, strerror(errno));
255
256 continue;
257 }
258
259 while ((de = readdir(d))) {
260 int a, b;
261
262 if (ignore_file(de->d_name))
263 continue;
264
265 if (de->d_name[0] != 'S')
266 continue;
267
268 if (strlen(de->d_name) < 4)
269 continue;
270
271 if (!streq(de->d_name + 3, init_script))
272 continue;
273
274 /* Yay, we found it! Now decode the priority */
275
276 a = undecchar(de->d_name[1]);
277 b = undecchar(de->d_name[2]);
278
279 if (a < 0 || b < 0)
280 continue;
281
282 s->sysv_start_priority = a*10 + b;
283
284 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
285
286 closedir(d);
287 return 0;
288 }
289
290 closedir(d);
291 }
292
293 return 0;
294}
295
e537352b 296static int service_load_sysv_path(Service *s, const char *path) {
2c4104f0
LP		 297 FILE *f;
298 Unit *u;
299 unsigned line = 0;
300 int r;
301 enum {
302 NORMAL,
303 DESCRIPTION,
304 LSB,
305 LSB_DESCRIPTION
306 } state = NORMAL;
23a177ef
LP		 307
308 assert(s);
309 assert(path);
2c4104f0
LP		 310
311 u = UNIT(s);
312
313 if (!(f = fopen(path, "re"))) {
314 r = errno == ENOENT ? 0 : -errno;
315 goto finish;
316 }
317
318 s->type = SERVICE_FORKING;
319 s->restart = SERVICE_ONCE;
320
321 free(s->sysv_path);
322 if (!(s->sysv_path = strdup(path))) {
323 r = -ENOMEM;
324 goto finish;
325 }
326
327 while (!feof(f)) {
328 char l[LINE_MAX], *t;
329
330 if (!fgets(l, sizeof(l), f)) {
331 if (feof(f))
332 break;
333
334 r = -errno;
335 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
336 goto finish;
337 }
338
339 line++;
340
341 t = strstrip(l);
342 if (*t != '#')
343 continue;
344
345 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
346 state = LSB;
23a177ef 347 s->sysv_has_lsb = true;
2c4104f0
LP		 348 continue;
349 }
350
351 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
352 state = NORMAL;
353 continue;
354 }
355
356 t++;
357 t += strspn(t, WHITESPACE);
358
359 if (state == NORMAL) {
360
361 /* Try to parse Red Hat style chkconfig headers */
362
363 if (startswith(t, "chkconfig:")) {
364 int start_priority;
8309400a 365 char runlevels[16], *k;
2c4104f0
LP		 366
367 state = NORMAL;
368
8309400a
LP		 369 if (sscanf(t+10, "%15s %i %*i",
370 runlevels,
371 &start_priority) != 2) {
2c4104f0
LP		 372
373 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
374 continue;
375 }
376
8309400a 377 if (start_priority < 0 || start_priority > 99)
2c4104f0 378 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
8309400a
LP		 379 else
380 s->sysv_start_priority = start_priority;
381
382 char_array_0(runlevels);
383 k = delete_chars(runlevels, WHITESPACE "-");
384
385 if (k[0]) {
386 char *d;
387
388 if (!(d = strdup(k))) {
389 r = -ENOMEM;
390 goto finish;
391 }
392
393 free(s->sysv_runlevels);
394 s->sysv_runlevels = d;
2c4104f0
LP		 395 }
396
2c4104f0
LP		 397
398 } else if (startswith(t, "description:")) {
399
400 size_t k = strlen(t);
401 char *d;
402
403 if (t[k-1] == '\\') {
404 state = DESCRIPTION;
405 t[k-1] = 0;
406 }
407
408 if (!(d = strdup(strstrip(t+12)))) {
409 r = -ENOMEM;
410 goto finish;
411 }
412
413 free(u->meta.description);
414 u->meta.description = d;
415
416 } else if (startswith(t, "pidfile:")) {
417
418 char *fn;
419
420 state = NORMAL;
421
422 fn = strstrip(t+8);
423 if (!path_is_absolute(fn)) {
424 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
425 continue;
426 }
427
428 if (!(fn = strdup(fn))) {
429 r = -ENOMEM;
430 goto finish;
431 }
432
433 free(s->pid_file);
434 s->pid_file = fn;
435 }
436
437 } else if (state == DESCRIPTION) {
438
439 /* Try to parse Red Hat style description
440 * continuation */
441
442 size_t k = strlen(t);
443 char *d;
444
445 if (t[k-1] == '\\')
446 t[k-1] = 0;
447 else
448 state = NORMAL;
449
450 assert(u->meta.description);
451 if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
452 r = -ENOMEM;
453 goto finish;
454 }
455
456 free(u->meta.description);
457 u->meta.description = d;
458
459 } else if (state == LSB || state == LSB_DESCRIPTION) {
460
461 if (startswith(t, "Provides:")) {
462 char *i, *w;
463 size_t z;
464
465 state = LSB;
466
467 FOREACH_WORD(w, z, t+9, i) {
468 char *n, *m;
469
470 if (!(n = strndup(w, z))) {
471 r = -ENOMEM;
472 goto finish;
473 }
474
475 r = sysv_translate_name(n, &m);
476 free(n);
477
478 if (r < 0)
479 goto finish;
480
481 if (r == 0)
482 continue;
483
bd77d0fc
LP		 484 if (unit_name_to_type(m) == UNIT_SERVICE)
485 r = unit_add_name(u, m);
486 else {
487 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
488 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
489 }
490
2c4104f0
LP		 491 free(m);
492
493 if (r < 0)
494 goto finish;
495 }
496
497 } else if (startswith(t, "Required-Start:") ||
498 startswith(t, "Should-Start:")) {
499 char *i, *w;
500 size_t z;
501
502 state = LSB;
503
504 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
505 char *n, *m;
506
507 if (!(n = strndup(w, z))) {
508 r = -ENOMEM;
509 goto finish;
510 }
511
512 r = sysv_translate_name(n, &m);
513 free(n);
514
515 if (r < 0)
516 goto finish;
517
518 if (r == 0)
519 continue;
520
fc22fc6e 521 r = unit_add_dependency_by_name(u, UNIT_AFTER, m);
2c4104f0
LP		 522 free(m);
523
524 if (r < 0)
525 goto finish;
526 }
8309400a
LP		 527 } else if (startswith(t, "Default-Start:")) {
528 char *k, *d;
529
530 state = LSB;
531
532 k = delete_chars(t+14, WHITESPACE "-");
533
534 if (k[0] != 0) {
535 if (!(d = strdup(k))) {
536 r = -ENOMEM;
537 goto finish;
538 }
539
540 free(s->sysv_runlevels);
541 s->sysv_runlevels = d;
542 }
2c4104f0
LP		 543
544 } else if (startswith(t, "Description:")) {
545 char *d;
546
547 state = LSB_DESCRIPTION;
548
549 if (!(d = strdup(strstrip(t+12)))) {
550 r = -ENOMEM;
551 goto finish;
552 }
553
554 free(u->meta.description);
555 u->meta.description = d;
556
8309400a
LP		 557 } else if (startswith(t, "Short-Description:") &&
558 !u->meta.description) {
2c4104f0
LP		 559 char *d;
560
561 /* We use the short description only
562 * if no long description is set. */
563
564 state = LSB;
565
566 if (!(d = strdup(strstrip(t+18)))) {
567 r = -ENOMEM;
568 goto finish;
569 }
570
2c4104f0
LP		 571 u->meta.description = d;
572
573 } else if (state == LSB_DESCRIPTION) {
574
575 if (startswith(l, "#\t") || startswith(l, "# ")) {
576 char *d;
577
578 assert(u->meta.description);
579 if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
580 r = -ENOMEM;
581 goto finish;
582 }
583
584 free(u->meta.description);
585 u->meta.description = d;
586 } else
587 state = LSB;
588 }
589 }
590 }
591
23a177ef
LP		 592 /* If init scripts have no LSB header, then we enforce the
593 * ordering via the chkconfig priorities. We try to determine
594 * a priority for *all* init scripts here, since they are
595 * needed as soon as at least one non-LSB script is used. */
2c4104f0 596
23a177ef
LP		 597 if (s->sysv_start_priority < 0) {
598 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
599
600 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
2c4104f0
LP		 601 goto finish;
602
23a177ef
LP		 603 if (s->sysv_start_priority < 0)
604 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
605 }
606
2c4104f0
LP		 607 if ((r = sysv_exec_commands(s)) < 0)
608 goto finish;
609
0bc824be
LP		 610 if (!s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels)) {
611 /* If there a runlevels configured for this service
612 * but none of the standard ones, then we assume this
613 * is some special kind of service (which might be
614 * needed for early boot) and don't create any links
615 * to it. */
616
617 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 ||
618 (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0)
619 goto finish;
620 }
0fd030be 621
e537352b 622 u->meta.load_state = UNIT_LOADED;
23a177ef 623 r = 0;
2c4104f0
LP		 624
625finish:
626
627 if (f)
628 fclose(f);
629
630 return r;
631}
632
e537352b 633static int service_load_sysv_name(Service *s, const char *name) {
2c4104f0
LP		 634 char **p;
635
636 assert(s);
637 assert(name);
638
639 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
640 char *path;
641 int r;
642
643 if (asprintf(&path, "%s/%s", *p, name) < 0)
644 return -ENOMEM;
645
646 assert(endswith(path, ".service"));
647 path[strlen(path)-8] = 0;
648
e537352b 649 r = service_load_sysv_path(s, path);
2c4104f0
LP		 650 free(path);
651
23a177ef 652 if (r < 0)
2c4104f0 653 return r;
23a177ef 654
e537352b 655 if ((UNIT(s)->meta.load_state != UNIT_STUB))
23a177ef 656 break;
2c4104f0
LP		 657 }
658
659 return 0;
660}
661
e537352b 662static int service_load_sysv(Service *s) {
2c4104f0
LP		 663 const char *t;
664 Iterator i;
665 int r;
666
5cb5a6ff
LP		 667 assert(s);
668
669 /* Load service data from SysV init scripts, preferably with
670 * LSB headers ... */
671
2c4104f0
LP		 672 if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
673 return 0;
674
675 if ((t = unit_id(UNIT(s))))
e537352b 676 if ((r = service_load_sysv_name(s, t)) < 0)
2c4104f0
LP		 677 return r;
678
e537352b 679 if (UNIT(s)->meta.load_state == UNIT_STUB)
23a177ef 680 SET_FOREACH(t, UNIT(s)->meta.names, i) {
e537352b
LP		 681 if (t == unit_id(UNIT(s)))
682 continue;
683
684 if ((r == service_load_sysv_name(s, t)) < 0)
23a177ef
LP		 685 return r;
686
e537352b 687 if (UNIT(s)->meta.load_state != UNIT_STUB)
23a177ef
LP		 688 break;
689 }
2c4104f0
LP		 690
691 return 0;
5cb5a6ff
LP		 692}
693
e537352b 694static void service_init(Unit *u) {
87f0e418 695 Service *s = SERVICE(u);
5cb5a6ff 696
e537352b
LP		 697 assert(u);
698 assert(u->meta.load_state == UNIT_STUB);
034c6ed7
LP		 699
700 s->type = 0;
701 s->restart = 0;
702
703 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
704 s->restart_usec = DEFAULT_RESTART_USEC;
705
706 exec_context_init(&s->exec_context);
707
acbb0225 708 s->timer_watch.type = WATCH_INVALID;
034c6ed7
LP		 709
710 s->state = SERVICE_DEAD;
5cb5a6ff 711
2c4104f0 712 s->sysv_start_priority = -1;
81a2b7ce
LP		 713 s->permissions_start_only = false;
714 s->root_directory_start_only = false;
50159e6a
LP		 715 s->valid_no_process = false;
716 s->kill_mode = 0;
23a177ef 717 s->sysv_has_lsb = false;
50159e6a
LP		 718 s->main_pid = s->control_pid = 0;
719 s->main_pid_known = false;
720 s->failure = false;
23a177ef 721
1e2e8133 722 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
e537352b
LP		 723}
724
725static int service_load(Unit *u) {
726 int r;
727 Service *s = SERVICE(u);
728
729 assert(s);
1e2e8133 730
5cb5a6ff 731 /* Load a .service file */
e537352b 732 if ((r = unit_load_fragment(u)) < 0)
5cb5a6ff
LP		 733 return r;
734
bd77d0fc 735 /* Load a classic init script as a fallback, if we couldn't find anything */
e537352b
LP		 736 if (u->meta.load_state == UNIT_STUB)
737 if ((r = service_load_sysv(s)) < 0)
23a177ef 738 return r;
d46de8a1 739
23a177ef 740 /* Still nothing found? Then let's give up */
e537352b 741 if (u->meta.load_state == UNIT_STUB)
23a177ef 742 return -ENOENT;
034c6ed7 743
23a177ef
LP		 744 /* We were able to load something, then let's add in the
745 * dropin directories. */
746 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
8e274523 747 return r;
23a177ef
LP		 748
749 /* This is a new unit? Then let's add in some extras */
e537352b 750 if (u->meta.load_state == UNIT_LOADED) {
23a177ef
LP		 751 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
752 return r;
753
754 if ((r = unit_add_default_cgroup(u)) < 0)
755 return r;
756
757 if ((r = sysv_chkconfig_order(s)) < 0)
758 return r;
8e274523
LP		 759 }
760
44d8db9e 761 return 0;
034c6ed7
LP		 762}
763
87f0e418 764static void service_dump(Unit *u, FILE *f, const char *prefix) {
5cb5a6ff 765
5cb5a6ff 766 ServiceExecCommand c;
87f0e418 767 Service *s = SERVICE(u);
47be870b
LP		 768 const char *prefix2;
769 char *p2;
5cb5a6ff
LP		 770
771 assert(s);
772
47be870b
LP		 773 p2 = strappend(prefix, "\t");
774 prefix2 = p2 ? p2 : prefix;
44d8db9e 775
5cb5a6ff 776 fprintf(f,
81a2b7ce
LP		 777 "%sService State: %s\n"
778 "%sPermissionsStartOnly: %s\n"
8e274523 779 "%sRootDirectoryStartOnly: %s\n"
03d6ab85 780 "%sValidNoProcess: %s\n"
50159e6a 781 "%sKillMode: %s\n"
03d6ab85 782 "%sType: %s\n",
81a2b7ce
LP		 783 prefix, service_state_to_string(s->state),
784 prefix, yes_no(s->permissions_start_only),
8e274523 785 prefix, yes_no(s->root_directory_start_only),
03d6ab85 786 prefix, yes_no(s->valid_no_process),
50159e6a 787 prefix, kill_mode_to_string(s->kill_mode),
03d6ab85 788 prefix, service_type_to_string(s->type));
5cb5a6ff 789
70123e68
LP		 790 if (s->control_pid > 0)
791 fprintf(f,
792 "%sControl PID: %llu\n",
793 prefix, (unsigned long long) s->control_pid);
794
795 if (s->main_pid > 0)
796 fprintf(f,
797 "%sMain PID: %llu\n",
798 prefix, (unsigned long long) s->main_pid);
799
034c6ed7
LP		 800 if (s->pid_file)
801 fprintf(f,
802 "%sPIDFile: %s\n",
803 prefix, s->pid_file);
804
5cb5a6ff
LP		 805 exec_context_dump(&s->exec_context, f, prefix);
806
e537352b 807 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
5cb5a6ff 808
44d8db9e
LP		 809 if (!s->exec_command[c])
810 continue;
811
812 fprintf(f, "%s→ %s:\n",
94f04347 813 prefix, service_exec_command_to_string(c));
44d8db9e
LP		 814
815 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 816 }
44d8db9e 817
2c4104f0
LP		 818 if (s->sysv_path)
819 fprintf(f,
23a177ef
LP		 820 "%sSysV Init Script Path: %s\n"
821 "%sSysV Init Script has LSB Header: %s\n",
822 prefix, s->sysv_path,
823 prefix, yes_no(s->sysv_has_lsb));
2c4104f0
LP		 824
825 if (s->sysv_start_priority >= 0)
826 fprintf(f,
23a177ef 827 "%sSysVStartPriority: %i\n",
2c4104f0
LP		 828 prefix, s->sysv_start_priority);
829
8309400a
LP		 830 if (s->sysv_runlevels)
831 fprintf(f, "%sSysVRunLevels: %s\n",
832 prefix, s->sysv_runlevels);
23a177ef 833
47be870b 834 free(p2);
5cb5a6ff
LP		 835}
836
034c6ed7
LP		 837static int service_load_pid_file(Service *s) {
838 char *k;
839 unsigned long p;
840 int r;
841
842 assert(s);
843
844 if (s->main_pid_known)
845 return 0;
846
5e94833f
LP		 847 assert(s->main_pid <= 0);
848
034c6ed7
LP		 849 if (!s->pid_file)
850 return -ENOENT;
851
852 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
853 return r;
854
855 if ((r = safe_atolu(k, &p)) < 0) {
856 free(k);
857 return r;
858 }
859
860 if ((unsigned long) (pid_t) p != p)
861 return -ERANGE;
862
b8c597d5
LP		 863 if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
864 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
865 (unsigned long long) p, s->pid_file);
866 return -ESRCH;
867 }
868
16f6025e
LP		 869 if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
870 /* FIXME: we need to do something here */
871 return r;
872
b8c597d5 873 s->main_pid = (pid_t) p;
034c6ed7
LP		 874 s->main_pid_known = true;
875
876 return 0;
877}
878
3e33402a
LP		 879static int service_get_sockets(Service *s, Set **_set) {
880 Set *set;
ceee3d82
LP		 881 Iterator i;
882 char *t;
3e33402a 883 int r;
ceee3d82
LP		 884
885 assert(s);
3e33402a
LP		 886 assert(_set);
887
888 /* Collects all Socket objects that belong to this
889 * service. Note that a service might have multiple sockets
890 * via multiple names. */
891
892 if (!(set = set_new(NULL, NULL)))
893 return -ENOMEM;
ceee3d82
LP		 894
895 SET_FOREACH(t, UNIT(s)->meta.names, i) {
896 char *k;
897 Unit *p;
898
899 /* Look for all socket objects that go by any of our
900 * units and collect their fds */
901
3e33402a
LP		 902 if (!(k = unit_name_change_suffix(t, ".socket"))) {
903 r = -ENOMEM;
904 goto fail;
905 }
ceee3d82
LP		 906
907 p = manager_get_unit(UNIT(s)->meta.manager, k);
908 free(k);
909
3e33402a 910 if (!p) continue;
ceee3d82 911
3e33402a
LP		 912 if ((r = set_put(set, p)) < 0)
913 goto fail;
ceee3d82
LP		 914 }
915
3e33402a
LP		 916 *_set = set;
917 return 0;
918
919fail:
920 set_free(set);
921 return r;
922}
923
924
e537352b 925static int service_notify_sockets_dead(Service *s) {
3e33402a
LP		 926 Iterator i;
927 Set *set;
47be870b 928 Socket *sock;
3e33402a
LP		 929 int r;
930
931 assert(s);
932
933 /* Notifies all our sockets when we die */
934
935 if ((r = service_get_sockets(s, &set)) < 0)
936 return r;
937
47be870b
LP		 938 SET_FOREACH(sock, set, i)
939 socket_notify_service_dead(sock);
3e33402a
LP		 940
941 set_free(set);
942
ceee3d82
LP		 943 return 0;
944}
945
034c6ed7
LP		 946static void service_set_state(Service *s, ServiceState state) {
947 ServiceState old_state;
5cb5a6ff
LP		 948 assert(s);
949
034c6ed7 950 old_state = s->state;
5cb5a6ff 951 s->state = state;
034c6ed7
LP		 952
953 if (state != SERVICE_START_PRE &&
954 state != SERVICE_START &&
955 state != SERVICE_START_POST &&
956 state != SERVICE_RELOAD &&
957 state != SERVICE_STOP &&
958 state != SERVICE_STOP_SIGTERM &&
959 state != SERVICE_STOP_SIGKILL &&
960 state != SERVICE_STOP_POST &&
961 state != SERVICE_FINAL_SIGTERM &&
962 state != SERVICE_FINAL_SIGKILL &&
963 state != SERVICE_AUTO_RESTART)
acbb0225 964 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7 965
7d55e835
LP		 966 if (state != SERVICE_START &&
967 state != SERVICE_START_POST &&
034c6ed7
LP		 968 state != SERVICE_RUNNING &&
969 state != SERVICE_RELOAD &&
970 state != SERVICE_STOP &&
971 state != SERVICE_STOP_SIGTERM &&
972 state != SERVICE_STOP_SIGKILL)
5e94833f 973 service_unwatch_main_pid(s);
034c6ed7
LP		 974
975 if (state != SERVICE_START_PRE &&
976 state != SERVICE_START &&
977 state != SERVICE_START_POST &&
978 state != SERVICE_RELOAD &&
979 state != SERVICE_STOP &&
980 state != SERVICE_STOP_SIGTERM &&
981 state != SERVICE_STOP_SIGKILL &&
982 state != SERVICE_STOP_POST &&
983 state != SERVICE_FINAL_SIGTERM &&
e537352b 984 state != SERVICE_FINAL_SIGKILL) {
5e94833f 985 service_unwatch_control_pid(s);
034c6ed7 986 s->control_command = NULL;
e537352b 987 }
034c6ed7 988
ceee3d82
LP		 989 if (state == SERVICE_DEAD ||
990 state == SERVICE_STOP ||
991 state == SERVICE_STOP_SIGTERM ||
992 state == SERVICE_STOP_SIGKILL ||
993 state == SERVICE_STOP_POST ||
994 state == SERVICE_FINAL_SIGTERM ||
995 state == SERVICE_FINAL_SIGKILL ||
996 state == SERVICE_MAINTAINANCE ||
997 state == SERVICE_AUTO_RESTART)
e537352b 998 service_notify_sockets_dead(s);
ceee3d82 999
e537352b
LP		 1000 if (old_state != state)
1001 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
acbb0225
LP		 1002
1003 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
034c6ed7
LP		 1004}
1005
44d8db9e
LP		 1006static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1007 Iterator i;
1008 int r;
1009 int *rfds = NULL;
1010 unsigned rn_fds = 0;
3e33402a 1011 Set *set;
47be870b 1012 Socket *sock;
44d8db9e
LP		 1013
1014 assert(s);
1015 assert(fds);
1016 assert(n_fds);
1017
3e33402a
LP		 1018 if ((r = service_get_sockets(s, &set)) < 0)
1019 return r;
1020
47be870b 1021 SET_FOREACH(sock, set, i) {
44d8db9e
LP		 1022 int *cfds;
1023 unsigned cn_fds;
1024
47be870b 1025 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
44d8db9e
LP		 1026 goto fail;
1027
1028 if (!cfds)
1029 continue;
1030
1031 if (!rfds) {
1032 rfds = cfds;
1033 rn_fds = cn_fds;
1034 } else {
1035 int *t;
1036
1037 if (!(t = new(int, rn_fds+cn_fds))) {
1038 free(cfds);
1039 r = -ENOMEM;
1040 goto fail;
1041 }
1042
1043 memcpy(t, rfds, rn_fds);
1044 memcpy(t+rn_fds, cfds, cn_fds);
1045 free(rfds);
1046 free(cfds);
1047
1048 rfds = t;
1049 rn_fds = rn_fds+cn_fds;
1050 }
1051 }
1052
1053 *fds = rfds;
1054 *n_fds = rn_fds;
3e33402a
LP		 1055
1056 set_free(set);
1057
44d8db9e
LP		 1058 return 0;
1059
1060fail:
3e33402a 1061 set_free(set);
44d8db9e 1062 free(rfds);
3e33402a 1063
44d8db9e
LP		 1064 return r;
1065}
1066
81a2b7ce
LP		 1067static int service_spawn(
1068 Service *s,
1069 ExecCommand *c,
1070 bool timeout,
1071 bool pass_fds,
1072 bool apply_permissions,
1073 bool apply_chroot,
1074 pid_t *_pid) {
1075
034c6ed7
LP		 1076 pid_t pid;
1077 int r;
44d8db9e
LP		 1078 int *fds = NULL;
1079 unsigned n_fds = 0;
034c6ed7
LP		 1080
1081 assert(s);
1082 assert(c);
1083 assert(_pid);
1084
44d8db9e
LP		 1085 if (pass_fds)
1086 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1087 goto fail;
1088
034c6ed7 1089 if (timeout) {
acbb0225 1090 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
034c6ed7
LP		 1091 goto fail;
1092 } else
acbb0225 1093 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7 1094
81a2b7ce
LP		 1095 if ((r = exec_spawn(c,
1096 &s->exec_context,
1097 fds, n_fds,
1098 apply_permissions,
1099 apply_chroot,
8e274523 1100 UNIT(s)->meta.cgroup_bondings,
81a2b7ce 1101 &pid)) < 0)
034c6ed7
LP		 1102 goto fail;
1103
87f0e418 1104 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
034c6ed7
LP		 1105 /* FIXME: we need to do something here */
1106 goto fail;
1107
44d8db9e 1108 free(fds);
034c6ed7
LP		 1109 *_pid = pid;
1110
5cb5a6ff 1111 return 0;
034c6ed7
LP		 1112
1113fail:
44d8db9e
LP		 1114 free(fds);
1115
034c6ed7 1116 if (timeout)
acbb0225 1117 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7
LP		 1118
1119 return r;
1120}
1121
1122static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1123 int r;
1124 assert(s);
1125
1126 if (!success)
1127 s->failure = true;
1128
1129 if (allow_restart &&
1130 (s->restart == SERVICE_RESTART_ALWAYS ||
1131 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1132
acbb0225 1133 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
034c6ed7
LP		 1134 goto fail;
1135
1136 service_set_state(s, SERVICE_AUTO_RESTART);
1137 } else
1138 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1139
1140 return;
1141
1142fail:
87f0e418 1143 log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1144 service_enter_dead(s, false, false);
1145}
1146
1147static void service_enter_signal(Service *s, ServiceState state, bool success);
1148
1149static void service_enter_stop_post(Service *s, bool success) {
1150 int r;
1151 assert(s);
1152
1153 if (!success)
1154 s->failure = true;
1155
5e94833f
LP		 1156 service_unwatch_control_pid(s);
1157
d6ea93e3 1158 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
81a2b7ce
LP		 1159 if ((r = service_spawn(s,
1160 s->control_command,
1161 true,
1162 false,
1163 !s->permissions_start_only,
1164 !s->root_directory_start_only,
1165 &s->control_pid)) < 0)
034c6ed7
LP		 1166 goto fail;
1167
d6ea93e3
LP		 1168
1169 service_set_state(s, SERVICE_STOP_POST);
1170
1171 if (!s->control_command)
034c6ed7
LP		 1172 service_enter_dead(s, true, true);
1173
1174 return;
1175
1176fail:
87f0e418 1177 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1178 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1179}
1180
1181static void service_enter_signal(Service *s, ServiceState state, bool success) {
1182 int r;
1183 bool sent = false;
1184
1185 assert(s);
1186
1187 if (!success)
1188 s->failure = true;
1189
1190 if (s->main_pid > 0 || s->control_pid > 0) {
1191 int sig;
1192
1193 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1194
50159e6a 1195 if (s->kill_mode == KILL_CONTROL_GROUP) {
034c6ed7 1196
50159e6a
LP		 1197 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1198 if (r != -EAGAIN && r != -ESRCH)
1199 goto fail;
1200 } else
034c6ed7
LP		 1201 sent = true;
1202 }
1203
50159e6a
LP		 1204 if (!sent) {
1205 r = 0;
1206 if (s->main_pid > 0) {
1207 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1208 r = -errno;
1209 else
1210 sent = true;
1211 }
1212
1213 if (s->control_pid > 0) {
1214 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1215 r = -errno;
1216 else
1217 sent = true;
1218 }
1219
1220 if (r < 0)
1221 goto fail;
1222 }
d6ea93e3 1223 }
034c6ed7 1224
d6ea93e3
LP		 1225 service_set_state(s, state);
1226
1227 if (s->main_pid <= 0 && s->control_pid <= 0)
034c6ed7
LP		 1228 service_enter_dead(s, true, true);
1229
1230 return;
1231
1232fail:
87f0e418 1233 log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1234
1235 if (sent) {
1236 s->failure = true;
1237 service_set_state(s, state);
1238 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1239 service_enter_stop_post(s, false);
1240 else
1241 service_enter_dead(s, false, true);
1242}
1243
1244static void service_enter_stop(Service *s, bool success) {
1245 int r;
1246 assert(s);
1247
1248 if (!success)
1249 s->failure = true;
1250
5e94833f
LP		 1251 service_unwatch_control_pid(s);
1252
d6ea93e3 1253 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
81a2b7ce
LP		 1254 if ((r = service_spawn(s,
1255 s->control_command,
1256 true,
1257 false,
1258 !s->permissions_start_only,
1259 !s->root_directory_start_only,
1260 &s->control_pid)) < 0)
034c6ed7
LP		 1261 goto fail;
1262
d6ea93e3
LP		 1263 service_set_state(s, SERVICE_STOP);
1264
1265 if (!s->control_command)
034c6ed7
LP		 1266 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1267
1268 return;
1269
1270fail:
87f0e418 1271 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1272 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1273}
1274
1275static void service_enter_start_post(Service *s) {
1276 int r;
1277 assert(s);
1278
5e94833f
LP		 1279 service_unwatch_control_pid(s);
1280
d6ea93e3 1281 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
81a2b7ce
LP		 1282 if ((r = service_spawn(s,
1283 s->control_command,
1284 true,
1285 false,
1286 !s->permissions_start_only,
1287 !s->root_directory_start_only,
1288 &s->control_pid)) < 0)
034c6ed7
LP		 1289 goto fail;
1290
d6ea93e3
LP		 1291
1292 service_set_state(s, SERVICE_START_POST);
1293
1294 if (!s->control_command)
034c6ed7
LP		 1295 service_set_state(s, SERVICE_RUNNING);
1296
1297 return;
1298
1299fail:
87f0e418 1300 log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1301 service_enter_stop(s, false);
1302}
1303
1304static void service_enter_start(Service *s) {
1305 pid_t pid;
1306 int r;
1307
1308 assert(s);
1309
1310 assert(s->exec_command[SERVICE_EXEC_START]);
1311 assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1312
81a2b7ce
LP		 1313 if ((r = service_spawn(s,
1314 s->exec_command[SERVICE_EXEC_START],
1315 s->type == SERVICE_FORKING,
1316 true,
1317 true,
1318 true,
1319 &pid)) < 0)
034c6ed7
LP		 1320 goto fail;
1321
d6ea93e3
LP		 1322 service_set_state(s, SERVICE_START);
1323
034c6ed7
LP		 1324 if (s->type == SERVICE_SIMPLE) {
1325 /* For simple services we immediately start
1326 * the START_POST binaries. */
1327
5e94833f
LP		 1328 service_unwatch_main_pid(s);
1329
034c6ed7
LP		 1330 s->main_pid = pid;
1331 s->main_pid_known = true;
1332 service_enter_start_post(s);
1333
1334 } else if (s->type == SERVICE_FORKING) {
1335
1336 /* For forking services we wait until the start
1337 * process exited. */
1338
5e94833f
LP		 1339 service_unwatch_control_pid(s);
1340
034c6ed7
LP		 1341 s->control_pid = pid;
1342 s->control_command = s->exec_command[SERVICE_EXEC_START];
7d55e835
LP		 1343 } else if (s->type == SERVICE_FINISH) {
1344
1345 /* For finishing services we wait until the start
1346 * process exited, too, but it is our main process. */
1347
5e94833f
LP		 1348 service_unwatch_main_pid(s);
1349
7d55e835 1350 s->main_pid = pid;
5e94833f 1351 s->main_pid_known = true;
7d55e835 1352 s->control_command = s->exec_command[SERVICE_EXEC_START];
034c6ed7
LP		 1353 } else
1354 assert_not_reached("Unknown service type");
1355
1356 return;
1357
1358fail:
87f0e418 1359 log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1360 service_enter_stop(s, false);
1361}
1362
1363static void service_enter_start_pre(Service *s) {
1364 int r;
1365
1366 assert(s);
1367
5e94833f
LP		 1368 service_unwatch_control_pid(s);
1369
d6ea93e3 1370 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
81a2b7ce
LP		 1371 if ((r = service_spawn(s,
1372 s->control_command,
1373 true,
1374 false,
1375 !s->permissions_start_only,
1376 !s->root_directory_start_only,
1377 &s->control_pid)) < 0)
034c6ed7
LP		 1378 goto fail;
1379
d6ea93e3
LP		 1380 service_set_state(s, SERVICE_START_PRE);
1381
1382 if (!s->control_command)
034c6ed7
LP		 1383 service_enter_start(s);
1384
1385 return;
1386
1387fail:
87f0e418 1388 log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1389 service_enter_dead(s, false, true);
1390}
1391
1392static void service_enter_restart(Service *s) {
1393 int r;
1394 assert(s);
1395
87f0e418 1396 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
034c6ed7
LP		 1397 goto fail;
1398
87f0e418 1399 log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
034c6ed7
LP		 1400 service_enter_dead(s, true, false);
1401 return;
1402
1403fail:
1404
87f0e418 1405 log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1406 service_enter_dead(s, false, false);
1407}
1408
1409static void service_enter_reload(Service *s) {
1410 int r;
1411
1412 assert(s);
1413
5e94833f
LP		 1414 service_unwatch_control_pid(s);
1415
d6ea93e3 1416 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
81a2b7ce
LP		 1417 if ((r = service_spawn(s,
1418 s->control_command,
1419 true,
1420 false,
1421 !s->permissions_start_only,
1422 !s->root_directory_start_only,
1423 &s->control_pid)) < 0)
034c6ed7
LP		 1424 goto fail;
1425
d6ea93e3
LP		 1426 service_set_state(s, SERVICE_RELOAD);
1427
1428 if (!s->control_command)
034c6ed7
LP		 1429 service_set_state(s, SERVICE_RUNNING);
1430
1431 return;
1432
1433fail:
87f0e418 1434 log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1435 service_enter_stop(s, false);
1436}
1437
1438static void service_run_next(Service *s, bool success) {
1439 int r;
1440
1441 assert(s);
1442 assert(s->control_command);
1443 assert(s->control_command->command_next);
1444
1445 if (!success)
1446 s->failure = true;
1447
1448 s->control_command = s->control_command->command_next;
1449
5e94833f
LP		 1450 service_unwatch_control_pid(s);
1451
81a2b7ce
LP		 1452 if ((r = service_spawn(s,
1453 s->control_command,
1454 true,
1455 false,
1456 !s->permissions_start_only,
1457 !s->root_directory_start_only,
1458 &s->control_pid)) < 0)
034c6ed7
LP		 1459 goto fail;
1460
1461 return;
1462
1463fail:
87f0e418 1464 log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1465
1466 if (s->state == SERVICE_STOP)
1467 service_enter_stop_post(s, false);
1468 else if (s->state == SERVICE_STOP_POST)
1469 service_enter_dead(s, false, true);
1470 else
1471 service_enter_stop(s, false);
5cb5a6ff
LP		 1472}
1473
87f0e418
LP		 1474static int service_start(Unit *u) {
1475 Service *s = SERVICE(u);
5cb5a6ff
LP		 1476
1477 assert(s);
1478
034c6ed7
LP		 1479 /* We cannot fulfill this request right now, try again later
1480 * please! */
1481 if (s->state == SERVICE_STOP ||
1482 s->state == SERVICE_STOP_SIGTERM ||
1483 s->state == SERVICE_STOP_SIGKILL ||
1484 s->state == SERVICE_STOP_POST ||
1485 s->state == SERVICE_FINAL_SIGTERM ||
1486 s->state == SERVICE_FINAL_SIGKILL)
5cb5a6ff
LP		 1487 return -EAGAIN;
1488
034c6ed7
LP		 1489 /* Already on it! */
1490 if (s->state == SERVICE_START_PRE ||
1491 s->state == SERVICE_START ||
1492 s->state == SERVICE_START_POST)
1493 return 0;
1494
1495 assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
5cb5a6ff 1496
1e2e8133
LP		 1497 /* Make sure we don't enter a busy loop of some kind. */
1498 if (!ratelimit_test(&s->ratelimit)) {
1499 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1500 return -EAGAIN;
1501 }
1502
034c6ed7
LP		 1503 s->failure = false;
1504 s->main_pid_known = false;
1505
1506 service_enter_start_pre(s);
1507 return 0;
5cb5a6ff
LP		 1508}
1509
87f0e418
LP		 1510static int service_stop(Unit *u) {
1511 Service *s = SERVICE(u);
5cb5a6ff
LP		 1512
1513 assert(s);
1514
e537352b 1515 /* Cannot do this now */
034c6ed7
LP		 1516 if (s->state == SERVICE_START_PRE ||
1517 s->state == SERVICE_START ||
1518 s->state == SERVICE_START_POST ||
1519 s->state == SERVICE_RELOAD)
1520 return -EAGAIN;
1521
e537352b
LP		 1522 /* Already on it */
1523 if (s->state == SERVICE_STOP ||
1524 s->state == SERVICE_STOP_SIGTERM ||
1525 s->state == SERVICE_STOP_SIGKILL ||
1526 s->state == SERVICE_STOP_POST ||
1527 s->state == SERVICE_FINAL_SIGTERM ||
1528 s->state == SERVICE_FINAL_SIGKILL)
1529 return 0;
1530
034c6ed7
LP		 1531 if (s->state == SERVICE_AUTO_RESTART) {
1532 service_set_state(s, SERVICE_DEAD);
1533 return 0;
1534 }
1535
1536 assert(s->state == SERVICE_RUNNING);
5cb5a6ff 1537
034c6ed7 1538 service_enter_stop(s, true);
5cb5a6ff
LP		 1539 return 0;
1540}
1541
87f0e418
LP		 1542static int service_reload(Unit *u) {
1543 Service *s = SERVICE(u);
034c6ed7
LP		 1544
1545 assert(s);
1546
1547 assert(s->state == SERVICE_RUNNING);
1548
1549 service_enter_reload(s);
5cb5a6ff
LP		 1550 return 0;
1551}
1552
87f0e418
LP		 1553static bool service_can_reload(Unit *u) {
1554 Service *s = SERVICE(u);
034c6ed7
LP		 1555
1556 assert(s);
1557
1558 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1559}
1560
87f0e418
LP		 1561static UnitActiveState service_active_state(Unit *u) {
1562 assert(u);
5cb5a6ff 1563
acbb0225 1564 return state_translation_table[SERVICE(u)->state];
034c6ed7
LP		 1565}
1566
1567static int main_pid_good(Service *s) {
1568 assert(s);
1569
1570 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1571 * don't know */
1572
1573 /* If we know the pid file, then lets just check if it is
1574 * still valid */
1575 if (s->main_pid_known)
1576 return s->main_pid > 0;
1577
1578 /* We don't know the pid */
8e274523 1579 return -EAGAIN;
034c6ed7
LP		 1580}
1581
1582static bool control_pid_good(Service *s) {
1583 assert(s);
5cb5a6ff 1584
034c6ed7 1585 return s->control_pid > 0;
5cb5a6ff
LP		 1586}
1587
8e274523
LP		 1588static int cgroup_good(Service *s) {
1589 assert(s);
1590
1591 if (s->valid_no_process)
1592 return -EAGAIN;
1593
1594 return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1595}
1596
87f0e418
LP		 1597static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1598 Service *s = SERVICE(u);
034c6ed7 1599 bool success;
5cb5a6ff
LP		 1600
1601 assert(s);
034c6ed7
LP		 1602 assert(pid >= 0);
1603
bd982a8b 1604 success = code == CLD_EXITED && status == 0;
034c6ed7
LP		 1605 s->failure = s->failure || !success;
1606
1607 if (s->main_pid == pid) {
1608
1609 exec_status_fill(&s->main_exec_status, pid, code, status);
1610 s->main_pid = 0;
1611
7d55e835 1612 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
034c6ed7
LP		 1613 assert(s->exec_command[SERVICE_EXEC_START]);
1614 s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1615 }
1616
50159e6a 1617 log_debug("%s: main process exited, code=%s, status=%i", unit_id(u), sigchld_code_to_string(code), status);
034c6ed7
LP		 1618
1619 /* The service exited, so the service is officially
1620 * gone. */
1621
1622 switch (s->state) {
1623
1624 case SERVICE_START_POST:
1625 case SERVICE_RELOAD:
1626 case SERVICE_STOP:
1627 /* Need to wait until the operation is
1628 * done */
1629 break;
1630
7d55e835
LP		 1631 case SERVICE_START:
1632 assert(s->type == SERVICE_FINISH);
1633
1634 /* This was our main goal, so let's go on */
1635 if (success)
1636 service_enter_start_post(s);
1637 else
1638 service_enter_stop(s, false);
1639 break;
1640
034c6ed7
LP		 1641 case SERVICE_RUNNING:
1642 service_enter_stop(s, success);
1643 break;
1644
1645 case SERVICE_STOP_SIGTERM:
1646 case SERVICE_STOP_SIGKILL:
1647
1648 if (!control_pid_good(s))
1649 service_enter_stop_post(s, success);
5cb5a6ff 1650
034c6ed7
LP		 1651 /* If there is still a control process, wait for that first */
1652 break;
5cb5a6ff 1653
034c6ed7
LP		 1654 default:
1655 assert_not_reached("Uh, main process died at wrong time.");
1656 }
5cb5a6ff 1657
034c6ed7
LP		 1658 } else if (s->control_pid == pid) {
1659 assert(s->control_command);
1660
1661 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1662 s->control_pid = 0;
1663
94f04347 1664 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
034c6ed7
LP		 1665
1666 /* If we are shutting things down anyway we
1667 * don't care about failing commands. */
1668
1669 if (s->control_command->command_next &&
b866264a 1670 (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
034c6ed7
LP		 1671
1672 /* There is another command to *
1673 * execute, so let's do that. */
1674
1675 service_run_next(s, success);
1676
1677 else {
1678 /* No further commands for this step, so let's
1679 * figure out what to do next */
1680
94f04347 1681 log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
bd982a8b 1682
034c6ed7
LP		 1683 switch (s->state) {
1684
1685 case SERVICE_START_PRE:
1686 if (success)
1687 service_enter_start(s);
1688 else
1689 service_enter_stop(s, false);
1690 break;
1691
1692 case SERVICE_START:
1693 assert(s->type == SERVICE_FORKING);
1694
1695 /* Let's try to load the pid
1696 * file here if we can. We
1697 * ignore the return value,
1698 * since the PID file might
1699 * actually be created by a
1700 * START_POST script */
1701
1702 if (success) {
1703 if (s->pid_file)
1704 service_load_pid_file(s);
1705
1706 service_enter_start_post(s);
1707 } else
1708 service_enter_stop(s, false);
1709
1710 break;
1711
1712 case SERVICE_START_POST:
1713 if (success && s->pid_file && !s->main_pid_known) {
1714 int r;
1715
1716 /* Hmm, let's see if we can
1717 * load the pid now after the
1718 * start-post scripts got
1719 * executed. */
1720
1721 if ((r = service_load_pid_file(s)) < 0)
87f0e418 1722 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
034c6ed7
LP		 1723 }
1724
1725 /* Fall through */
1726
1727 case SERVICE_RELOAD:
1728 if (success) {
8e274523 1729 if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
034c6ed7
LP		 1730 service_set_state(s, SERVICE_RUNNING);
1731 else
1732 service_enter_stop(s, true);
1733 } else
1734 service_enter_stop(s, false);
1735
1736 break;
1737
1738 case SERVICE_STOP:
1739 if (main_pid_good(s) > 0)
1740 /* Still not dead and we know the PID? Let's go hunting. */
1741 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1742 else
1743 service_enter_stop_post(s, success);
1744 break;
1745
1746 case SERVICE_STOP_SIGTERM:
1747 case SERVICE_STOP_SIGKILL:
1748 if (main_pid_good(s) <= 0)
1749 service_enter_stop_post(s, success);
1750
1751 /* If there is still a service
1752 * process around, wait until
1753 * that one quit, too */
1754 break;
1755
1756 case SERVICE_STOP_POST:
1757 case SERVICE_FINAL_SIGTERM:
1758 case SERVICE_FINAL_SIGKILL:
1759 service_enter_dead(s, success, true);
1760 break;
1761
1762 default:
1763 assert_not_reached("Uh, control process died at wrong time.");
1764 }
1765 }
1766 } else
1767 assert_not_reached("Got SIGCHLD for unkown PID");
1768}
1769
acbb0225 1770static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
87f0e418 1771 Service *s = SERVICE(u);
034c6ed7
LP		 1772
1773 assert(s);
1774 assert(elapsed == 1);
1775
acbb0225 1776 assert(w == &s->timer_watch);
034c6ed7
LP		 1777
1778 switch (s->state) {
1779
1780 case SERVICE_START_PRE:
1781 case SERVICE_START:
1782 case SERVICE_START_POST:
1783 case SERVICE_RELOAD:
87f0e418 1784 log_warning("%s operation timed out. Stopping.", unit_id(u));
034c6ed7
LP		 1785 service_enter_stop(s, false);
1786 break;
1787
1788 case SERVICE_STOP:
87f0e418 1789 log_warning("%s stopping timed out. Terminating.", unit_id(u));
034c6ed7
LP		 1790 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1791 break;
1792
1793 case SERVICE_STOP_SIGTERM:
87f0e418 1794 log_warning("%s stopping timed out. Killing.", unit_id(u));
034c6ed7
LP		 1795 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1796 break;
1797
1798 case SERVICE_STOP_SIGKILL:
1799 /* Uh, wie sent a SIGKILL and it is still not gone?
1800 * Must be something we cannot kill, so let's just be
1801 * weirded out and continue */
1802
87f0e418 1803 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
034c6ed7
LP		 1804 service_enter_stop_post(s, false);
1805 break;
1806
1807 case SERVICE_STOP_POST:
87f0e418 1808 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
034c6ed7
LP		 1809 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1810 break;
1811
1812 case SERVICE_FINAL_SIGTERM:
87f0e418 1813 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
034c6ed7
LP		 1814 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1815 break;
1816
1817 case SERVICE_FINAL_SIGKILL:
87f0e418 1818 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
034c6ed7
LP		 1819 service_enter_dead(s, false, true);
1820 break;
1821
1822 case SERVICE_AUTO_RESTART:
87f0e418 1823 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
034c6ed7
LP		 1824 service_enter_restart(s);
1825 break;
1826
1827 default:
1828 assert_not_reached("Timeout at wrong time.");
1829 }
5cb5a6ff
LP		 1830}
1831
8e274523
LP		 1832static void service_cgroup_notify_event(Unit *u) {
1833 Service *s = SERVICE(u);
1834
1835 assert(u);
1836
1837 log_debug("%s: cgroup is empty", unit_id(u));
1838
1839 switch (s->state) {
1840
1841 /* Waiting for SIGCHLD is usually more interesting,
1842 * because it includes return codes/signals. Which is
1843 * why we ignore the cgroup events for most cases,
1844 * except when we don't know pid which to expect the
1845 * SIGCHLD for. */
1846
1847 case SERVICE_RUNNING:
1848
1849 if (!s->valid_no_process && main_pid_good(s) <= 0)
1850 service_enter_stop(s, true);
1851
1852 break;
1853
1854 default:
1855 ;
1856 }
1857}
1858
2c4104f0 1859static int service_enumerate(Manager *m) {
2c4104f0
LP		 1860 char **p;
1861 unsigned i;
1862 DIR *d = NULL;
1863 char *path = NULL, *fpath = NULL, *name = NULL;
1864 int r;
1865
1866 assert(m);
1867
5e177ece 1868 STRV_FOREACH(p, m->sysvrcnd_path)
23a177ef 1869 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
2c4104f0
LP		 1870 struct dirent *de;
1871
1872 free(path);
1873 path = NULL;
23a177ef 1874 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
2c4104f0
LP		 1875 r = -ENOMEM;
1876 goto finish;
1877 }
1878
1879 if (d)
1880 closedir(d);
1881
1882 if (!(d = opendir(path))) {
1883 if (errno != ENOENT)
1884 log_warning("opendir() failed on %s: %s", path, strerror(errno));
1885
1886 continue;
1887 }
1888
1889 while ((de = readdir(d))) {
1890 Unit *runlevel, *service;
1891
1892 if (ignore_file(de->d_name))
1893 continue;
1894
1895 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1896 continue;
1897
1898 if (strlen(de->d_name) < 4)
1899 continue;
1900
1901 free(fpath);
1902 fpath = NULL;
23a177ef 1903 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
2c4104f0
LP		 1904 r = -ENOMEM;
1905 goto finish;
1906 }
1907
1908 if (access(fpath, X_OK) < 0) {
1909
1910 if (errno != ENOENT)
1911 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1912
1913 continue;
1914 }
1915
1916 free(name);
1917 name = NULL;
1918 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1919 r = -ENOMEM;
1920 goto finish;
1921 }
1922
1923 if ((r = manager_load_unit(m, name, &service)) < 0)
1924 goto finish;
1925
23a177ef 1926 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
2c4104f0
LP		 1927 goto finish;
1928
1929 if (de->d_name[0] == 'S') {
1930 if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1931 goto finish;
1932
1933 if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1934 goto finish;
23a177ef
LP		 1935
1936 } else if (de->d_name[0] == 'K' &&
1937 (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1938 streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1939
1940 /* We honour K links only for
1941 * halt/reboot. For the normal
1942 * runlevels we assume the
1943 * stop jobs will be
1944 * implicitly added by the
1945 * core logic. */
1946
2c4104f0
LP		 1947 if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1948 goto finish;
1949
1950 if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1951 goto finish;
1952 }
1953 }
1954 }
1955
1956 r = 0;
1957
1958finish:
1959 free(path);
1960 free(fpath);
1961 free(name);
1962 closedir(d);
1963
1964 return r;
1965}
1966
94f04347
LP		 1967static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1968 [SERVICE_DEAD] = "dead",
1969 [SERVICE_START_PRE] = "start-pre",
1970 [SERVICE_START] = "start",
1971 [SERVICE_START_POST] = "start-post",
1972 [SERVICE_RUNNING] = "running",
1973 [SERVICE_RELOAD] = "reload",
1974 [SERVICE_STOP] = "stop",
1975 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1976 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1977 [SERVICE_STOP_POST] = "stop-post",
1978 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1979 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1980 [SERVICE_MAINTAINANCE] = "maintainance",
1981 [SERVICE_AUTO_RESTART] = "auto-restart",
1982};
1983
1984DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1985
1986static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1987 [SERVICE_ONCE] = "once",
1988 [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1989 [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1990};
1991
1992DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1993
1994static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1995 [SERVICE_FORKING] = "forking",
1996 [SERVICE_SIMPLE] = "simple",
1997 [SERVICE_FINISH] = "finish"
1998};
1999
2000DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2001
e537352b 2002static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
94f04347
LP		 2003 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2004 [SERVICE_EXEC_START] = "ExecStart",
2005 [SERVICE_EXEC_START_POST] = "ExecStartPost",
2006 [SERVICE_EXEC_RELOAD] = "ExecReload",
2007 [SERVICE_EXEC_STOP] = "ExecStop",
2008 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2009};
2010
2011DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2012
87f0e418 2013const UnitVTable service_vtable = {
5cb5a6ff
LP		 2014 .suffix = ".service",
2015
034c6ed7 2016 .init = service_init,
e537352b 2017 .load = service_load,
034c6ed7
LP		 2018 .done = service_done,
2019
5cb5a6ff
LP		 2020 .dump = service_dump,
2021
2022 .start = service_start,
2023 .stop = service_stop,
2024 .reload = service_reload,
2025
034c6ed7
LP		 2026 .can_reload = service_can_reload,
2027
5cb5a6ff
LP		 2028 .active_state = service_active_state,
2029
034c6ed7
LP		 2030 .sigchld_event = service_sigchld_event,
2031 .timer_event = service_timer_event,
2c4104f0 2032
8e274523
LP		 2033 .cgroup_notify_empty = service_cgroup_notify_event,
2034
2c4104f0 2035 .enumerate = service_enumerate
5cb5a6ff 2036};
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