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util: add chars_intersect() call
[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
87f0e418
LP		 66static void service_done(Unit *u) {
67 Service *s = SERVICE(u);
44d8db9e
LP		 68
69 assert(s);
70
71 free(s->pid_file);
72 s->pid_file = NULL;
73
2c4104f0
LP		 74 free(s->sysv_path);
75 s->sysv_path = NULL;
76
44d8db9e
LP		 77 exec_context_done(&s->exec_context);
78 exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
79 s->control_command = NULL;
80
81 /* This will leak a process, but at least no memory or any of
82 * our resources */
83 if (s->main_pid > 0) {
87f0e418 84 unit_unwatch_pid(u, s->main_pid);
44d8db9e
LP		 85 s->main_pid = 0;
86 }
87
88 if (s->control_pid > 0) {
87f0e418 89 unit_unwatch_pid(u, s->control_pid);
44d8db9e
LP		 90 s->control_pid = 0;
91 }
92
acbb0225 93 unit_unwatch_timer(u, &s->timer_watch);
44d8db9e
LP		 94}
95
2c4104f0
LP		 96static int sysv_translate_name(const char *name, char **_r) {
97
98 static const char * const table[] = {
99 "$local_fs", SPECIAL_LOCAL_FS_TARGET,
100 "$network", SPECIAL_NETWORK_TARGET,
101 "$named", SPECIAL_NSS_LOOKUP_TARGET,
102 "$portmap", SPECIAL_RPCBIND_TARGET,
103 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
104 "$syslog", SPECIAL_SYSLOG_TARGET,
105 "$time", SPECIAL_RTC_SET_TARGET
106 };
107
108 unsigned i;
109 char *r;
110
111 for (i = 0; i < ELEMENTSOF(table); i += 2)
112 if (streq(table[i], name)) {
113 if (!(r = strdup(table[i+1])))
114 return -ENOMEM;
115
116 goto finish;
117 }
118
119 if (*name == '$')
120 return 0;
121
122 if (asprintf(&r, "%s.service", name) < 0)
123 return -ENOMEM;
124
125finish:
126
127 if (_r)
128 *_r = r;
129
130 return 1;
131}
132
133static int sysv_chkconfig_order(Service *s) {
134 Meta *other;
135 int r;
136
137 assert(s);
138
139 if (s->sysv_start_priority < 0)
140 return 0;
141
23a177ef
LP		 142 /* For each pair of services where at least one lacks a LSB
143 * header, we use the start priority value to order things. */
2c4104f0
LP		 144
145 LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
146 Service *t;
147 UnitDependency d;
148
149 t = (Service*) other;
150
151 if (s == t)
152 continue;
153
154 if (t->sysv_start_priority < 0)
155 continue;
156
23a177ef
LP		 157 if (s->sysv_has_lsb && t->sysv_has_lsb)
158 continue;
159
2c4104f0
LP		 160 if (t->sysv_start_priority < s->sysv_start_priority)
161 d = UNIT_AFTER;
162 else if (t->sysv_start_priority > s->sysv_start_priority)
163 d = UNIT_BEFORE;
164 else
165 continue;
166
167 /* FIXME: Maybe we should compare the name here lexicographically? */
168
169 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
170 return r;
171 }
172
173 return 0;
174}
175
176static ExecCommand *exec_command_new(const char *path, const char *arg1) {
177 ExecCommand *c;
178
179 if (!(c = new0(ExecCommand, 1)))
180 return NULL;
181
182 if (!(c->path = strdup(path))) {
183 free(c);
184 return NULL;
185 }
186
187 if (!(c->argv = strv_new(path, arg1, NULL))) {
188 free(c->path);
189 free(c);
190 return NULL;
191 }
192
193 return c;
194}
195
196static int sysv_exec_commands(Service *s) {
197 ExecCommand *c;
198
199 assert(s);
200 assert(s->sysv_path);
201
202 if (!(c = exec_command_new(s->sysv_path, "start")))
203 return -ENOMEM;
204 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
205
206 if (!(c = exec_command_new(s->sysv_path, "stop")))
207 return -ENOMEM;
208 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
209
210 if (!(c = exec_command_new(s->sysv_path, "reload")))
211 return -ENOMEM;
212 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
213
214 return 0;
215}
216
23a177ef
LP		 217static int priority_from_rcd(Service *s, const char *init_script) {
218 char **p;
219 unsigned i;
220
061978fa 221 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
23a177ef
LP		 222 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
223 char *path;
224 DIR *d;
225 struct dirent *de;
226
227 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
228 return -ENOMEM;
229
230 d = opendir(path);
231 free(path);
232
233 if (!d) {
234 if (errno != ENOENT)
235 log_warning("opendir() failed on %s: %s", path, strerror(errno));
236
237 continue;
238 }
239
240 while ((de = readdir(d))) {
241 int a, b;
242
243 if (ignore_file(de->d_name))
244 continue;
245
246 if (de->d_name[0] != 'S')
247 continue;
248
249 if (strlen(de->d_name) < 4)
250 continue;
251
252 if (!streq(de->d_name + 3, init_script))
253 continue;
254
255 /* Yay, we found it! Now decode the priority */
256
257 a = undecchar(de->d_name[1]);
258 b = undecchar(de->d_name[2]);
259
260 if (a < 0 || b < 0)
261 continue;
262
263 s->sysv_start_priority = a*10 + b;
264
265 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
266
267 closedir(d);
268 return 0;
269 }
270
271 closedir(d);
272 }
273
274 return 0;
275}
276
277static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *new_state) {
2c4104f0
LP		 278 FILE *f;
279 Unit *u;
280 unsigned line = 0;
281 int r;
282 enum {
283 NORMAL,
284 DESCRIPTION,
285 LSB,
286 LSB_DESCRIPTION
287 } state = NORMAL;
23a177ef
LP		 288
289 assert(s);
290 assert(path);
291 assert(new_state);
2c4104f0
LP		 292
293 u = UNIT(s);
294
295 if (!(f = fopen(path, "re"))) {
296 r = errno == ENOENT ? 0 : -errno;
297 goto finish;
298 }
299
300 s->type = SERVICE_FORKING;
301 s->restart = SERVICE_ONCE;
302
303 free(s->sysv_path);
304 if (!(s->sysv_path = strdup(path))) {
305 r = -ENOMEM;
306 goto finish;
307 }
308
309 while (!feof(f)) {
310 char l[LINE_MAX], *t;
311
312 if (!fgets(l, sizeof(l), f)) {
313 if (feof(f))
314 break;
315
316 r = -errno;
317 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
318 goto finish;
319 }
320
321 line++;
322
323 t = strstrip(l);
324 if (*t != '#')
325 continue;
326
327 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
328 state = LSB;
23a177ef 329 s->sysv_has_lsb = true;
2c4104f0
LP		 330 continue;
331 }
332
333 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
334 state = NORMAL;
335 continue;
336 }
337
338 t++;
339 t += strspn(t, WHITESPACE);
340
341 if (state == NORMAL) {
342
343 /* Try to parse Red Hat style chkconfig headers */
344
345 if (startswith(t, "chkconfig:")) {
346 int start_priority;
347
348 state = NORMAL;
349
350 if (sscanf(t+10, "%*15s %i %*i",
351 &start_priority) != 1) {
352
353 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
354 continue;
355 }
356
357 if (start_priority < 0 || start_priority > 99) {
358 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
359 continue;
360 }
361
362 s->sysv_start_priority = start_priority;
363
364 } else if (startswith(t, "description:")) {
365
366 size_t k = strlen(t);
367 char *d;
368
369 if (t[k-1] == '\\') {
370 state = DESCRIPTION;
371 t[k-1] = 0;
372 }
373
374 if (!(d = strdup(strstrip(t+12)))) {
375 r = -ENOMEM;
376 goto finish;
377 }
378
379 free(u->meta.description);
380 u->meta.description = d;
381
382 } else if (startswith(t, "pidfile:")) {
383
384 char *fn;
385
386 state = NORMAL;
387
388 fn = strstrip(t+8);
389 if (!path_is_absolute(fn)) {
390 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
391 continue;
392 }
393
394 if (!(fn = strdup(fn))) {
395 r = -ENOMEM;
396 goto finish;
397 }
398
399 free(s->pid_file);
400 s->pid_file = fn;
401 }
402
403 } else if (state == DESCRIPTION) {
404
405 /* Try to parse Red Hat style description
406 * continuation */
407
408 size_t k = strlen(t);
409 char *d;
410
411 if (t[k-1] == '\\')
412 t[k-1] = 0;
413 else
414 state = NORMAL;
415
416 assert(u->meta.description);
417 if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
418 r = -ENOMEM;
419 goto finish;
420 }
421
422 free(u->meta.description);
423 u->meta.description = d;
424
425 } else if (state == LSB || state == LSB_DESCRIPTION) {
426
427 if (startswith(t, "Provides:")) {
428 char *i, *w;
429 size_t z;
430
431 state = LSB;
432
433 FOREACH_WORD(w, z, t+9, i) {
434 char *n, *m;
435
436 if (!(n = strndup(w, z))) {
437 r = -ENOMEM;
438 goto finish;
439 }
440
441 r = sysv_translate_name(n, &m);
442 free(n);
443
444 if (r < 0)
445 goto finish;
446
447 if (r == 0)
448 continue;
449
bd77d0fc
LP		 450 if (unit_name_to_type(m) == UNIT_SERVICE)
451 r = unit_add_name(u, m);
452 else {
453 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
454 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
455 }
456
2c4104f0
LP		 457 free(m);
458
459 if (r < 0)
460 goto finish;
461 }
462
463 } else if (startswith(t, "Required-Start:") ||
464 startswith(t, "Should-Start:")) {
465 char *i, *w;
466 size_t z;
467
468 state = LSB;
469
470 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
471 char *n, *m;
472
473 if (!(n = strndup(w, z))) {
474 r = -ENOMEM;
475 goto finish;
476 }
477
478 r = sysv_translate_name(n, &m);
479 free(n);
480
481 if (r < 0)
482 goto finish;
483
484 if (r == 0)
485 continue;
486
fc22fc6e 487 r = unit_add_dependency_by_name(u, UNIT_AFTER, m);
2c4104f0
LP		 488 free(m);
489
490 if (r < 0)
491 goto finish;
492 }
493
494 } else if (startswith(t, "Description:")) {
495 char *d;
496
497 state = LSB_DESCRIPTION;
498
499 if (!(d = strdup(strstrip(t+12)))) {
500 r = -ENOMEM;
501 goto finish;
502 }
503
504 free(u->meta.description);
505 u->meta.description = d;
506
507 } else if (startswith(t, "Short-Description:") && !u->meta.description) {
508 char *d;
509
510 /* We use the short description only
511 * if no long description is set. */
512
513 state = LSB;
514
515 if (!(d = strdup(strstrip(t+18)))) {
516 r = -ENOMEM;
517 goto finish;
518 }
519
520 free(u->meta.description);
521 u->meta.description = d;
522
523 } else if (state == LSB_DESCRIPTION) {
524
525 if (startswith(l, "#\t") || startswith(l, "# ")) {
526 char *d;
527
528 assert(u->meta.description);
529 if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
530 r = -ENOMEM;
531 goto finish;
532 }
533
534 free(u->meta.description);
535 u->meta.description = d;
536 } else
537 state = LSB;
538 }
539 }
540 }
541
23a177ef
LP		 542 /* If init scripts have no LSB header, then we enforce the
543 * ordering via the chkconfig priorities. We try to determine
544 * a priority for *all* init scripts here, since they are
545 * needed as soon as at least one non-LSB script is used. */
2c4104f0 546
23a177ef
LP		 547 if (s->sysv_start_priority < 0) {
548 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
549
550 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
2c4104f0
LP		 551 goto finish;
552
23a177ef
LP		 553 if (s->sysv_start_priority < 0)
554 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
555 }
556
2c4104f0
LP		 557 if ((r = sysv_exec_commands(s)) < 0)
558 goto finish;
559
adcbe07c
LP		 560 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 ||
561 (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0)
0fd030be
LP		 562 goto finish;
563
23a177ef
LP		 564 *new_state = UNIT_LOADED;
565 r = 0;
2c4104f0
LP		 566
567finish:
568
569 if (f)
570 fclose(f);
571
572 return r;
573}
574
23a177ef 575static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) {
2c4104f0
LP		 576 char **p;
577
578 assert(s);
579 assert(name);
580
581 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
582 char *path;
583 int r;
584
585 if (asprintf(&path, "%s/%s", *p, name) < 0)
586 return -ENOMEM;
587
588 assert(endswith(path, ".service"));
589 path[strlen(path)-8] = 0;
590
23a177ef 591 r = service_load_sysv_path(s, path, new_state);
2c4104f0
LP		 592 free(path);
593
23a177ef 594 if (r < 0)
2c4104f0 595 return r;
23a177ef
LP		 596
597 if (*new_state != UNIT_STUB)
598 break;
2c4104f0
LP		 599 }
600
601 return 0;
602}
603
23a177ef 604static int service_load_sysv(Service *s, UnitLoadState *new_state) {
2c4104f0
LP		 605 const char *t;
606 Iterator i;
607 int r;
608
5cb5a6ff 609 assert(s);
23a177ef 610 assert(new_state);
5cb5a6ff
LP		 611
612 /* Load service data from SysV init scripts, preferably with
613 * LSB headers ... */
614
2c4104f0
LP		 615 if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
616 return 0;
617
618 if ((t = unit_id(UNIT(s))))
23a177ef 619 if ((r = service_load_sysv_name(s, t, new_state)) < 0)
2c4104f0
LP		 620 return r;
621
23a177ef
LP		 622 if (*new_state == UNIT_STUB)
623 SET_FOREACH(t, UNIT(s)->meta.names, i) {
624 if ((r == service_load_sysv_name(s, t, new_state)) < 0)
625 return r;
626
627 if (*new_state != UNIT_STUB)
628 break;
629 }
2c4104f0
LP		 630
631 return 0;
5cb5a6ff
LP		 632}
633
23a177ef 634static int service_init(Unit *u, UnitLoadState *new_state) {
5cb5a6ff 635 int r;
87f0e418 636 Service *s = SERVICE(u);
5cb5a6ff
LP		 637
638 assert(s);
23a177ef
LP		 639 assert(new_state);
640 assert(*new_state == UNIT_STUB);
5cb5a6ff 641
034c6ed7
LP		 642 /* First, reset everything to the defaults, in case this is a
643 * reload */
644
645 s->type = 0;
646 s->restart = 0;
647
648 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
649 s->restart_usec = DEFAULT_RESTART_USEC;
650
651 exec_context_init(&s->exec_context);
652
acbb0225 653 s->timer_watch.type = WATCH_INVALID;
034c6ed7
LP		 654
655 s->state = SERVICE_DEAD;
5cb5a6ff 656
2c4104f0 657 s->sysv_start_priority = -1;
81a2b7ce
LP		 658 s->permissions_start_only = false;
659 s->root_directory_start_only = false;
2c4104f0 660
23a177ef
LP		 661 s->sysv_has_lsb = false;
662
1e2e8133
LP		 663 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
664
5cb5a6ff 665 /* Load a .service file */
23a177ef 666 if ((r = unit_load_fragment(u, new_state)) < 0)
5cb5a6ff
LP		 667 return r;
668
bd77d0fc 669 /* Load a classic init script as a fallback, if we couldn't find anything */
23a177ef
LP		 670 if (*new_state == UNIT_STUB)
671 if ((r = service_load_sysv(s, new_state)) < 0)
672 return r;
d46de8a1 673
23a177ef
LP		 674 /* Still nothing found? Then let's give up */
675 if (*new_state == UNIT_STUB)
676 return -ENOENT;
034c6ed7 677
23a177ef
LP		 678 /* We were able to load something, then let's add in the
679 * dropin directories. */
680 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
8e274523 681 return r;
23a177ef
LP		 682
683 /* This is a new unit? Then let's add in some extras */
684 if (*new_state == UNIT_LOADED) {
685 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
686 return r;
687
688 if ((r = unit_add_default_cgroup(u)) < 0)
689 return r;
690
691 if ((r = sysv_chkconfig_order(s)) < 0)
692 return r;
8e274523
LP		 693 }
694
44d8db9e 695 return 0;
034c6ed7
LP		 696}
697
87f0e418 698static void service_dump(Unit *u, FILE *f, const char *prefix) {
5cb5a6ff 699
5cb5a6ff 700 ServiceExecCommand c;
87f0e418 701 Service *s = SERVICE(u);
47be870b
LP		 702 const char *prefix2;
703 char *p2;
5cb5a6ff
LP		 704
705 assert(s);
706
47be870b
LP		 707 p2 = strappend(prefix, "\t");
708 prefix2 = p2 ? p2 : prefix;
44d8db9e 709
5cb5a6ff 710 fprintf(f,
81a2b7ce
LP		 711 "%sService State: %s\n"
712 "%sPermissionsStartOnly: %s\n"
8e274523 713 "%sRootDirectoryStartOnly: %s\n"
03d6ab85
LP		 714 "%sValidNoProcess: %s\n"
715 "%sType: %s\n",
81a2b7ce
LP		 716 prefix, service_state_to_string(s->state),
717 prefix, yes_no(s->permissions_start_only),
8e274523 718 prefix, yes_no(s->root_directory_start_only),
03d6ab85
LP		 719 prefix, yes_no(s->valid_no_process),
720 prefix, service_type_to_string(s->type));
5cb5a6ff 721
034c6ed7
LP		 722 if (s->pid_file)
723 fprintf(f,
724 "%sPIDFile: %s\n",
725 prefix, s->pid_file);
726
5cb5a6ff
LP		 727 exec_context_dump(&s->exec_context, f, prefix);
728
729 for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
5cb5a6ff 730
44d8db9e
LP		 731 if (!s->exec_command[c])
732 continue;
733
734 fprintf(f, "%s→ %s:\n",
94f04347 735 prefix, service_exec_command_to_string(c));
44d8db9e
LP		 736
737 exec_command_dump_list(s->exec_command[c], f, prefix2);
5cb5a6ff 738 }
44d8db9e 739
2c4104f0
LP		 740 if (s->sysv_path)
741 fprintf(f,
23a177ef
LP		 742 "%sSysV Init Script Path: %s\n"
743 "%sSysV Init Script has LSB Header: %s\n",
744 prefix, s->sysv_path,
745 prefix, yes_no(s->sysv_has_lsb));
2c4104f0
LP		 746
747 if (s->sysv_start_priority >= 0)
748 fprintf(f,
23a177ef 749 "%sSysVStartPriority: %i\n",
2c4104f0
LP		 750 prefix, s->sysv_start_priority);
751
23a177ef 752
47be870b 753 free(p2);
5cb5a6ff
LP		 754}
755
034c6ed7
LP		 756static int service_load_pid_file(Service *s) {
757 char *k;
758 unsigned long p;
759 int r;
760
761 assert(s);
762
763 if (s->main_pid_known)
764 return 0;
765
766 if (!s->pid_file)
767 return -ENOENT;
768
769 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
770 return r;
771
772 if ((r = safe_atolu(k, &p)) < 0) {
773 free(k);
774 return r;
775 }
776
777 if ((unsigned long) (pid_t) p != p)
778 return -ERANGE;
779
780 s->main_pid = p;
781 s->main_pid_known = true;
782
783 return 0;
784}
785
3e33402a
LP		 786static int service_get_sockets(Service *s, Set **_set) {
787 Set *set;
ceee3d82
LP		 788 Iterator i;
789 char *t;
3e33402a 790 int r;
ceee3d82
LP		 791
792 assert(s);
3e33402a
LP		 793 assert(_set);
794
795 /* Collects all Socket objects that belong to this
796 * service. Note that a service might have multiple sockets
797 * via multiple names. */
798
799 if (!(set = set_new(NULL, NULL)))
800 return -ENOMEM;
ceee3d82
LP		 801
802 SET_FOREACH(t, UNIT(s)->meta.names, i) {
803 char *k;
804 Unit *p;
805
806 /* Look for all socket objects that go by any of our
807 * units and collect their fds */
808
3e33402a
LP		 809 if (!(k = unit_name_change_suffix(t, ".socket"))) {
810 r = -ENOMEM;
811 goto fail;
812 }
ceee3d82
LP		 813
814 p = manager_get_unit(UNIT(s)->meta.manager, k);
815 free(k);
816
3e33402a 817 if (!p) continue;
ceee3d82 818
3e33402a
LP		 819 if ((r = set_put(set, p)) < 0)
820 goto fail;
ceee3d82
LP		 821 }
822
3e33402a
LP		 823 *_set = set;
824 return 0;
825
826fail:
827 set_free(set);
828 return r;
829}
830
831
832static int service_notify_sockets(Service *s) {
833 Iterator i;
834 Set *set;
47be870b 835 Socket *sock;
3e33402a
LP		 836 int r;
837
838 assert(s);
839
840 /* Notifies all our sockets when we die */
841
842 if ((r = service_get_sockets(s, &set)) < 0)
843 return r;
844
47be870b
LP		 845 SET_FOREACH(sock, set, i)
846 socket_notify_service_dead(sock);
3e33402a
LP		 847
848 set_free(set);
849
ceee3d82
LP		 850 return 0;
851}
852
034c6ed7
LP		 853static void service_set_state(Service *s, ServiceState state) {
854 ServiceState old_state;
5cb5a6ff
LP		 855 assert(s);
856
034c6ed7 857 old_state = s->state;
5cb5a6ff 858 s->state = state;
034c6ed7
LP		 859
860 if (state != SERVICE_START_PRE &&
861 state != SERVICE_START &&
862 state != SERVICE_START_POST &&
863 state != SERVICE_RELOAD &&
864 state != SERVICE_STOP &&
865 state != SERVICE_STOP_SIGTERM &&
866 state != SERVICE_STOP_SIGKILL &&
867 state != SERVICE_STOP_POST &&
868 state != SERVICE_FINAL_SIGTERM &&
869 state != SERVICE_FINAL_SIGKILL &&
870 state != SERVICE_AUTO_RESTART)
acbb0225 871 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7 872
7d55e835
LP		 873 if (state != SERVICE_START &&
874 state != SERVICE_START_POST &&
034c6ed7
LP		 875 state != SERVICE_RUNNING &&
876 state != SERVICE_RELOAD &&
877 state != SERVICE_STOP &&
878 state != SERVICE_STOP_SIGTERM &&
879 state != SERVICE_STOP_SIGKILL)
acbb0225 880 if (s->main_pid > 0) {
87f0e418 881 unit_unwatch_pid(UNIT(s), s->main_pid);
034c6ed7
LP		 882 s->main_pid = 0;
883 }
884
885 if (state != SERVICE_START_PRE &&
886 state != SERVICE_START &&
887 state != SERVICE_START_POST &&
888 state != SERVICE_RELOAD &&
889 state != SERVICE_STOP &&
890 state != SERVICE_STOP_SIGTERM &&
891 state != SERVICE_STOP_SIGKILL &&
892 state != SERVICE_STOP_POST &&
893 state != SERVICE_FINAL_SIGTERM &&
894 state != SERVICE_FINAL_SIGKILL)
acbb0225 895 if (s->control_pid > 0) {
87f0e418 896 unit_unwatch_pid(UNIT(s), s->control_pid);
034c6ed7
LP		 897 s->control_pid = 0;
898 }
899
900 if (state != SERVICE_START_PRE &&
901 state != SERVICE_START &&
902 state != SERVICE_START_POST &&
903 state != SERVICE_RELOAD &&
904 state != SERVICE_STOP &&
905 state != SERVICE_STOP_POST)
906 s->control_command = NULL;
907
ceee3d82
LP		 908 if (state == SERVICE_DEAD ||
909 state == SERVICE_STOP ||
910 state == SERVICE_STOP_SIGTERM ||
911 state == SERVICE_STOP_SIGKILL ||
912 state == SERVICE_STOP_POST ||
913 state == SERVICE_FINAL_SIGTERM ||
914 state == SERVICE_FINAL_SIGKILL ||
915 state == SERVICE_MAINTAINANCE ||
916 state == SERVICE_AUTO_RESTART)
917 service_notify_sockets(s);
918
94f04347 919 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
acbb0225
LP		 920
921 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
034c6ed7
LP		 922}
923
44d8db9e
LP		 924static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
925 Iterator i;
926 int r;
927 int *rfds = NULL;
928 unsigned rn_fds = 0;
3e33402a 929 Set *set;
47be870b 930 Socket *sock;
44d8db9e
LP		 931
932 assert(s);
933 assert(fds);
934 assert(n_fds);
935
3e33402a
LP		 936 if ((r = service_get_sockets(s, &set)) < 0)
937 return r;
938
47be870b 939 SET_FOREACH(sock, set, i) {
44d8db9e
LP		 940 int *cfds;
941 unsigned cn_fds;
942
47be870b 943 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
44d8db9e
LP		 944 goto fail;
945
946 if (!cfds)
947 continue;
948
949 if (!rfds) {
950 rfds = cfds;
951 rn_fds = cn_fds;
952 } else {
953 int *t;
954
955 if (!(t = new(int, rn_fds+cn_fds))) {
956 free(cfds);
957 r = -ENOMEM;
958 goto fail;
959 }
960
961 memcpy(t, rfds, rn_fds);
962 memcpy(t+rn_fds, cfds, cn_fds);
963 free(rfds);
964 free(cfds);
965
966 rfds = t;
967 rn_fds = rn_fds+cn_fds;
968 }
969 }
970
971 *fds = rfds;
972 *n_fds = rn_fds;
3e33402a
LP		 973
974 set_free(set);
975
44d8db9e
LP		 976 return 0;
977
978fail:
3e33402a 979 set_free(set);
44d8db9e 980 free(rfds);
3e33402a 981
44d8db9e
LP		 982 return r;
983}
984
81a2b7ce
LP		 985static int service_spawn(
986 Service *s,
987 ExecCommand *c,
988 bool timeout,
989 bool pass_fds,
990 bool apply_permissions,
991 bool apply_chroot,
992 pid_t *_pid) {
993
034c6ed7
LP		 994 pid_t pid;
995 int r;
44d8db9e
LP		 996 int *fds = NULL;
997 unsigned n_fds = 0;
034c6ed7
LP		 998
999 assert(s);
1000 assert(c);
1001 assert(_pid);
1002
44d8db9e
LP		 1003 if (pass_fds)
1004 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1005 goto fail;
1006
034c6ed7 1007 if (timeout) {
acbb0225 1008 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
034c6ed7
LP		 1009 goto fail;
1010 } else
acbb0225 1011 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7 1012
81a2b7ce
LP		 1013 if ((r = exec_spawn(c,
1014 &s->exec_context,
1015 fds, n_fds,
1016 apply_permissions,
1017 apply_chroot,
8e274523 1018 UNIT(s)->meta.cgroup_bondings,
81a2b7ce 1019 &pid)) < 0)
034c6ed7
LP		 1020 goto fail;
1021
87f0e418 1022 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
034c6ed7
LP		 1023 /* FIXME: we need to do something here */
1024 goto fail;
1025
44d8db9e 1026 free(fds);
034c6ed7
LP		 1027 *_pid = pid;
1028
5cb5a6ff 1029 return 0;
034c6ed7
LP		 1030
1031fail:
44d8db9e
LP		 1032 free(fds);
1033
034c6ed7 1034 if (timeout)
acbb0225 1035 unit_unwatch_timer(UNIT(s), &s->timer_watch);
034c6ed7
LP		 1036
1037 return r;
1038}
1039
1040static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1041 int r;
1042 assert(s);
1043
1044 if (!success)
1045 s->failure = true;
1046
1047 if (allow_restart &&
1048 (s->restart == SERVICE_RESTART_ALWAYS ||
1049 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1050
acbb0225 1051 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
034c6ed7
LP		 1052 goto fail;
1053
1054 service_set_state(s, SERVICE_AUTO_RESTART);
1055 } else
1056 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1057
1058 return;
1059
1060fail:
87f0e418 1061 log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1062 service_enter_dead(s, false, false);
1063}
1064
1065static void service_enter_signal(Service *s, ServiceState state, bool success);
1066
1067static void service_enter_stop_post(Service *s, bool success) {
1068 int r;
1069 assert(s);
1070
1071 if (!success)
1072 s->failure = true;
1073
d6ea93e3 1074 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
81a2b7ce
LP		 1075 if ((r = service_spawn(s,
1076 s->control_command,
1077 true,
1078 false,
1079 !s->permissions_start_only,
1080 !s->root_directory_start_only,
1081 &s->control_pid)) < 0)
034c6ed7
LP		 1082 goto fail;
1083
d6ea93e3
LP		 1084
1085 service_set_state(s, SERVICE_STOP_POST);
1086
1087 if (!s->control_command)
034c6ed7
LP		 1088 service_enter_dead(s, true, true);
1089
1090 return;
1091
1092fail:
87f0e418 1093 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1094 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1095}
1096
1097static void service_enter_signal(Service *s, ServiceState state, bool success) {
1098 int r;
1099 bool sent = false;
1100
1101 assert(s);
1102
1103 if (!success)
1104 s->failure = true;
1105
1106 if (s->main_pid > 0 || s->control_pid > 0) {
1107 int sig;
1108
1109 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1110
1111 r = 0;
1112 if (s->main_pid > 0) {
1113 if (kill(s->main_pid, sig) < 0 && errno != ESRCH)
1114 r = -errno;
1115 else
1116 sent = true;
1117 }
1118
1119 if (s->control_pid > 0) {
1120 if (kill(s->control_pid, sig) < 0 && errno != ESRCH)
1121 r = -errno;
1122 else
1123 sent = true;
1124 }
1125
1126 if (r < 0)
1127 goto fail;
d6ea93e3 1128 }
034c6ed7 1129
d6ea93e3
LP		 1130 service_set_state(s, state);
1131
1132 if (s->main_pid <= 0 && s->control_pid <= 0)
034c6ed7
LP		 1133 service_enter_dead(s, true, true);
1134
1135 return;
1136
1137fail:
87f0e418 1138 log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1139
1140 if (sent) {
1141 s->failure = true;
1142 service_set_state(s, state);
1143 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1144 service_enter_stop_post(s, false);
1145 else
1146 service_enter_dead(s, false, true);
1147}
1148
1149static void service_enter_stop(Service *s, bool success) {
1150 int r;
1151 assert(s);
1152
1153 if (!success)
1154 s->failure = true;
1155
d6ea93e3 1156 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
81a2b7ce
LP		 1157 if ((r = service_spawn(s,
1158 s->control_command,
1159 true,
1160 false,
1161 !s->permissions_start_only,
1162 !s->root_directory_start_only,
1163 &s->control_pid)) < 0)
034c6ed7
LP		 1164 goto fail;
1165
d6ea93e3
LP		 1166 service_set_state(s, SERVICE_STOP);
1167
1168 if (!s->control_command)
034c6ed7
LP		 1169 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1170
1171 return;
1172
1173fail:
87f0e418 1174 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1175 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1176}
1177
1178static void service_enter_start_post(Service *s) {
1179 int r;
1180 assert(s);
1181
d6ea93e3 1182 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
81a2b7ce
LP		 1183 if ((r = service_spawn(s,
1184 s->control_command,
1185 true,
1186 false,
1187 !s->permissions_start_only,
1188 !s->root_directory_start_only,
1189 &s->control_pid)) < 0)
034c6ed7
LP		 1190 goto fail;
1191
d6ea93e3
LP		 1192
1193 service_set_state(s, SERVICE_START_POST);
1194
1195 if (!s->control_command)
034c6ed7
LP		 1196 service_set_state(s, SERVICE_RUNNING);
1197
1198 return;
1199
1200fail:
87f0e418 1201 log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1202 service_enter_stop(s, false);
1203}
1204
1205static void service_enter_start(Service *s) {
1206 pid_t pid;
1207 int r;
1208
1209 assert(s);
1210
1211 assert(s->exec_command[SERVICE_EXEC_START]);
1212 assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1213
81a2b7ce
LP		 1214 if ((r = service_spawn(s,
1215 s->exec_command[SERVICE_EXEC_START],
1216 s->type == SERVICE_FORKING,
1217 true,
1218 true,
1219 true,
1220 &pid)) < 0)
034c6ed7
LP		 1221 goto fail;
1222
d6ea93e3
LP		 1223 service_set_state(s, SERVICE_START);
1224
034c6ed7
LP		 1225 if (s->type == SERVICE_SIMPLE) {
1226 /* For simple services we immediately start
1227 * the START_POST binaries. */
1228
1229 s->main_pid = pid;
1230 s->main_pid_known = true;
1231 service_enter_start_post(s);
1232
1233 } else if (s->type == SERVICE_FORKING) {
1234
1235 /* For forking services we wait until the start
1236 * process exited. */
1237
1238 s->control_pid = pid;
1239 s->control_command = s->exec_command[SERVICE_EXEC_START];
7d55e835
LP		 1240 } else if (s->type == SERVICE_FINISH) {
1241
1242 /* For finishing services we wait until the start
1243 * process exited, too, but it is our main process. */
1244
1245 s->main_pid = pid;
1246 s->control_command = s->exec_command[SERVICE_EXEC_START];
034c6ed7
LP		 1247 } else
1248 assert_not_reached("Unknown service type");
1249
1250 return;
1251
1252fail:
87f0e418 1253 log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1254 service_enter_stop(s, false);
1255}
1256
1257static void service_enter_start_pre(Service *s) {
1258 int r;
1259
1260 assert(s);
1261
d6ea93e3 1262 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
81a2b7ce
LP		 1263 if ((r = service_spawn(s,
1264 s->control_command,
1265 true,
1266 false,
1267 !s->permissions_start_only,
1268 !s->root_directory_start_only,
1269 &s->control_pid)) < 0)
034c6ed7
LP		 1270 goto fail;
1271
d6ea93e3
LP		 1272 service_set_state(s, SERVICE_START_PRE);
1273
1274 if (!s->control_command)
034c6ed7
LP		 1275 service_enter_start(s);
1276
1277 return;
1278
1279fail:
87f0e418 1280 log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1281 service_enter_dead(s, false, true);
1282}
1283
1284static void service_enter_restart(Service *s) {
1285 int r;
1286 assert(s);
1287
87f0e418 1288 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
034c6ed7
LP		 1289 goto fail;
1290
87f0e418 1291 log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
034c6ed7
LP		 1292 service_enter_dead(s, true, false);
1293 return;
1294
1295fail:
1296
87f0e418 1297 log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1298 service_enter_dead(s, false, false);
1299}
1300
1301static void service_enter_reload(Service *s) {
1302 int r;
1303
1304 assert(s);
1305
d6ea93e3 1306 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
81a2b7ce
LP		 1307 if ((r = service_spawn(s,
1308 s->control_command,
1309 true,
1310 false,
1311 !s->permissions_start_only,
1312 !s->root_directory_start_only,
1313 &s->control_pid)) < 0)
034c6ed7
LP		 1314 goto fail;
1315
d6ea93e3
LP		 1316 service_set_state(s, SERVICE_RELOAD);
1317
1318 if (!s->control_command)
034c6ed7
LP		 1319 service_set_state(s, SERVICE_RUNNING);
1320
1321 return;
1322
1323fail:
87f0e418 1324 log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1325 service_enter_stop(s, false);
1326}
1327
1328static void service_run_next(Service *s, bool success) {
1329 int r;
1330
1331 assert(s);
1332 assert(s->control_command);
1333 assert(s->control_command->command_next);
1334
1335 if (!success)
1336 s->failure = true;
1337
1338 s->control_command = s->control_command->command_next;
1339
81a2b7ce
LP		 1340 if ((r = service_spawn(s,
1341 s->control_command,
1342 true,
1343 false,
1344 !s->permissions_start_only,
1345 !s->root_directory_start_only,
1346 &s->control_pid)) < 0)
034c6ed7
LP		 1347 goto fail;
1348
1349 return;
1350
1351fail:
87f0e418 1352 log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
034c6ed7
LP		 1353
1354 if (s->state == SERVICE_STOP)
1355 service_enter_stop_post(s, false);
1356 else if (s->state == SERVICE_STOP_POST)
1357 service_enter_dead(s, false, true);
1358 else
1359 service_enter_stop(s, false);
5cb5a6ff
LP		 1360}
1361
87f0e418
LP		 1362static int service_start(Unit *u) {
1363 Service *s = SERVICE(u);
5cb5a6ff
LP		 1364
1365 assert(s);
1366
034c6ed7
LP		 1367 /* We cannot fulfill this request right now, try again later
1368 * please! */
1369 if (s->state == SERVICE_STOP ||
1370 s->state == SERVICE_STOP_SIGTERM ||
1371 s->state == SERVICE_STOP_SIGKILL ||
1372 s->state == SERVICE_STOP_POST ||
1373 s->state == SERVICE_FINAL_SIGTERM ||
1374 s->state == SERVICE_FINAL_SIGKILL)
5cb5a6ff
LP		 1375 return -EAGAIN;
1376
034c6ed7
LP		 1377 /* Already on it! */
1378 if (s->state == SERVICE_START_PRE ||
1379 s->state == SERVICE_START ||
1380 s->state == SERVICE_START_POST)
1381 return 0;
1382
1383 assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
5cb5a6ff 1384
1e2e8133
LP		 1385 /* Make sure we don't enter a busy loop of some kind. */
1386 if (!ratelimit_test(&s->ratelimit)) {
1387 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1388 return -EAGAIN;
1389 }
1390
034c6ed7
LP		 1391 s->failure = false;
1392 s->main_pid_known = false;
1393
1394 service_enter_start_pre(s);
1395 return 0;
5cb5a6ff
LP		 1396}
1397
87f0e418
LP		 1398static int service_stop(Unit *u) {
1399 Service *s = SERVICE(u);
5cb5a6ff
LP		 1400
1401 assert(s);
1402
034c6ed7
LP		 1403 if (s->state == SERVICE_START_PRE ||
1404 s->state == SERVICE_START ||
1405 s->state == SERVICE_START_POST ||
1406 s->state == SERVICE_RELOAD)
1407 return -EAGAIN;
1408
1409 if (s->state == SERVICE_AUTO_RESTART) {
1410 service_set_state(s, SERVICE_DEAD);
1411 return 0;
1412 }
1413
1414 assert(s->state == SERVICE_RUNNING);
5cb5a6ff 1415
034c6ed7 1416 service_enter_stop(s, true);
5cb5a6ff
LP		 1417 return 0;
1418}
1419
87f0e418
LP		 1420static int service_reload(Unit *u) {
1421 Service *s = SERVICE(u);
034c6ed7
LP		 1422
1423 assert(s);
1424
1425 assert(s->state == SERVICE_RUNNING);
1426
1427 service_enter_reload(s);
5cb5a6ff
LP		 1428 return 0;
1429}
1430
87f0e418
LP		 1431static bool service_can_reload(Unit *u) {
1432 Service *s = SERVICE(u);
034c6ed7
LP		 1433
1434 assert(s);
1435
1436 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1437}
1438
87f0e418
LP		 1439static UnitActiveState service_active_state(Unit *u) {
1440 assert(u);
5cb5a6ff 1441
acbb0225 1442 return state_translation_table[SERVICE(u)->state];
034c6ed7
LP		 1443}
1444
1445static int main_pid_good(Service *s) {
1446 assert(s);
1447
1448 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1449 * don't know */
1450
1451 /* If we know the pid file, then lets just check if it is
1452 * still valid */
1453 if (s->main_pid_known)
1454 return s->main_pid > 0;
1455
1456 /* We don't know the pid */
8e274523 1457 return -EAGAIN;
034c6ed7
LP		 1458}
1459
1460static bool control_pid_good(Service *s) {
1461 assert(s);
5cb5a6ff 1462
034c6ed7 1463 return s->control_pid > 0;
5cb5a6ff
LP		 1464}
1465
8e274523
LP		 1466static int cgroup_good(Service *s) {
1467 assert(s);
1468
1469 if (s->valid_no_process)
1470 return -EAGAIN;
1471
1472 return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1473}
1474
87f0e418
LP		 1475static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1476 Service *s = SERVICE(u);
034c6ed7 1477 bool success;
5cb5a6ff
LP		 1478
1479 assert(s);
034c6ed7
LP		 1480 assert(pid >= 0);
1481
bd982a8b 1482 success = code == CLD_EXITED && status == 0;
034c6ed7
LP		 1483 s->failure = s->failure || !success;
1484
1485 if (s->main_pid == pid) {
1486
1487 exec_status_fill(&s->main_exec_status, pid, code, status);
1488 s->main_pid = 0;
1489
7d55e835 1490 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
034c6ed7
LP		 1491 assert(s->exec_command[SERVICE_EXEC_START]);
1492 s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1493 }
1494
94f04347 1495 log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
034c6ed7
LP		 1496
1497 /* The service exited, so the service is officially
1498 * gone. */
1499
1500 switch (s->state) {
1501
1502 case SERVICE_START_POST:
1503 case SERVICE_RELOAD:
1504 case SERVICE_STOP:
1505 /* Need to wait until the operation is
1506 * done */
1507 break;
1508
7d55e835
LP		 1509 case SERVICE_START:
1510 assert(s->type == SERVICE_FINISH);
1511
1512 /* This was our main goal, so let's go on */
1513 if (success)
1514 service_enter_start_post(s);
1515 else
1516 service_enter_stop(s, false);
1517 break;
1518
034c6ed7
LP		 1519 case SERVICE_RUNNING:
1520 service_enter_stop(s, success);
1521 break;
1522
1523 case SERVICE_STOP_SIGTERM:
1524 case SERVICE_STOP_SIGKILL:
1525
1526 if (!control_pid_good(s))
1527 service_enter_stop_post(s, success);
5cb5a6ff 1528
034c6ed7
LP		 1529 /* If there is still a control process, wait for that first */
1530 break;
5cb5a6ff 1531
034c6ed7
LP		 1532 default:
1533 assert_not_reached("Uh, main process died at wrong time.");
1534 }
5cb5a6ff 1535
034c6ed7
LP		 1536 } else if (s->control_pid == pid) {
1537 assert(s->control_command);
1538
1539 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1540 s->control_pid = 0;
1541
94f04347 1542 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
034c6ed7
LP		 1543
1544 /* If we are shutting things down anyway we
1545 * don't care about failing commands. */
1546
1547 if (s->control_command->command_next &&
b866264a 1548 (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
034c6ed7
LP		 1549
1550 /* There is another command to *
1551 * execute, so let's do that. */
1552
1553 service_run_next(s, success);
1554
1555 else {
1556 /* No further commands for this step, so let's
1557 * figure out what to do next */
1558
94f04347 1559 log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
bd982a8b 1560
034c6ed7
LP		 1561 switch (s->state) {
1562
1563 case SERVICE_START_PRE:
1564 if (success)
1565 service_enter_start(s);
1566 else
1567 service_enter_stop(s, false);
1568 break;
1569
1570 case SERVICE_START:
1571 assert(s->type == SERVICE_FORKING);
1572
1573 /* Let's try to load the pid
1574 * file here if we can. We
1575 * ignore the return value,
1576 * since the PID file might
1577 * actually be created by a
1578 * START_POST script */
1579
1580 if (success) {
1581 if (s->pid_file)
1582 service_load_pid_file(s);
1583
1584 service_enter_start_post(s);
1585 } else
1586 service_enter_stop(s, false);
1587
1588 break;
1589
1590 case SERVICE_START_POST:
1591 if (success && s->pid_file && !s->main_pid_known) {
1592 int r;
1593
1594 /* Hmm, let's see if we can
1595 * load the pid now after the
1596 * start-post scripts got
1597 * executed. */
1598
1599 if ((r = service_load_pid_file(s)) < 0)
87f0e418 1600 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
034c6ed7
LP		 1601 }
1602
1603 /* Fall through */
1604
1605 case SERVICE_RELOAD:
1606 if (success) {
8e274523 1607 if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
034c6ed7
LP		 1608 service_set_state(s, SERVICE_RUNNING);
1609 else
1610 service_enter_stop(s, true);
1611 } else
1612 service_enter_stop(s, false);
1613
1614 break;
1615
1616 case SERVICE_STOP:
1617 if (main_pid_good(s) > 0)
1618 /* Still not dead and we know the PID? Let's go hunting. */
1619 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1620 else
1621 service_enter_stop_post(s, success);
1622 break;
1623
1624 case SERVICE_STOP_SIGTERM:
1625 case SERVICE_STOP_SIGKILL:
1626 if (main_pid_good(s) <= 0)
1627 service_enter_stop_post(s, success);
1628
1629 /* If there is still a service
1630 * process around, wait until
1631 * that one quit, too */
1632 break;
1633
1634 case SERVICE_STOP_POST:
1635 case SERVICE_FINAL_SIGTERM:
1636 case SERVICE_FINAL_SIGKILL:
1637 service_enter_dead(s, success, true);
1638 break;
1639
1640 default:
1641 assert_not_reached("Uh, control process died at wrong time.");
1642 }
1643 }
1644 } else
1645 assert_not_reached("Got SIGCHLD for unkown PID");
1646}
1647
acbb0225 1648static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
87f0e418 1649 Service *s = SERVICE(u);
034c6ed7
LP		 1650
1651 assert(s);
1652 assert(elapsed == 1);
1653
acbb0225 1654 assert(w == &s->timer_watch);
034c6ed7
LP		 1655
1656 switch (s->state) {
1657
1658 case SERVICE_START_PRE:
1659 case SERVICE_START:
1660 case SERVICE_START_POST:
1661 case SERVICE_RELOAD:
87f0e418 1662 log_warning("%s operation timed out. Stopping.", unit_id(u));
034c6ed7
LP		 1663 service_enter_stop(s, false);
1664 break;
1665
1666 case SERVICE_STOP:
87f0e418 1667 log_warning("%s stopping timed out. Terminating.", unit_id(u));
034c6ed7
LP		 1668 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1669 break;
1670
1671 case SERVICE_STOP_SIGTERM:
87f0e418 1672 log_warning("%s stopping timed out. Killing.", unit_id(u));
034c6ed7
LP		 1673 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1674 break;
1675
1676 case SERVICE_STOP_SIGKILL:
1677 /* Uh, wie sent a SIGKILL and it is still not gone?
1678 * Must be something we cannot kill, so let's just be
1679 * weirded out and continue */
1680
87f0e418 1681 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
034c6ed7
LP		 1682 service_enter_stop_post(s, false);
1683 break;
1684
1685 case SERVICE_STOP_POST:
87f0e418 1686 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
034c6ed7
LP		 1687 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1688 break;
1689
1690 case SERVICE_FINAL_SIGTERM:
87f0e418 1691 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
034c6ed7
LP		 1692 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1693 break;
1694
1695 case SERVICE_FINAL_SIGKILL:
87f0e418 1696 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
034c6ed7
LP		 1697 service_enter_dead(s, false, true);
1698 break;
1699
1700 case SERVICE_AUTO_RESTART:
87f0e418 1701 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
034c6ed7
LP		 1702 service_enter_restart(s);
1703 break;
1704
1705 default:
1706 assert_not_reached("Timeout at wrong time.");
1707 }
5cb5a6ff
LP		 1708}
1709
8e274523
LP		 1710static void service_cgroup_notify_event(Unit *u) {
1711 Service *s = SERVICE(u);
1712
1713 assert(u);
1714
1715 log_debug("%s: cgroup is empty", unit_id(u));
1716
1717 switch (s->state) {
1718
1719 /* Waiting for SIGCHLD is usually more interesting,
1720 * because it includes return codes/signals. Which is
1721 * why we ignore the cgroup events for most cases,
1722 * except when we don't know pid which to expect the
1723 * SIGCHLD for. */
1724
1725 case SERVICE_RUNNING:
1726
1727 if (!s->valid_no_process && main_pid_good(s) <= 0)
1728 service_enter_stop(s, true);
1729
1730 break;
1731
1732 default:
1733 ;
1734 }
1735}
1736
2c4104f0 1737static int service_enumerate(Manager *m) {
2c4104f0
LP		 1738 char **p;
1739 unsigned i;
1740 DIR *d = NULL;
1741 char *path = NULL, *fpath = NULL, *name = NULL;
1742 int r;
1743
1744 assert(m);
1745
5e177ece 1746 STRV_FOREACH(p, m->sysvrcnd_path)
23a177ef 1747 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
2c4104f0
LP		 1748 struct dirent *de;
1749
1750 free(path);
1751 path = NULL;
23a177ef 1752 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
2c4104f0
LP		 1753 r = -ENOMEM;
1754 goto finish;
1755 }
1756
1757 if (d)
1758 closedir(d);
1759
1760 if (!(d = opendir(path))) {
1761 if (errno != ENOENT)
1762 log_warning("opendir() failed on %s: %s", path, strerror(errno));
1763
1764 continue;
1765 }
1766
1767 while ((de = readdir(d))) {
1768 Unit *runlevel, *service;
1769
1770 if (ignore_file(de->d_name))
1771 continue;
1772
1773 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1774 continue;
1775
1776 if (strlen(de->d_name) < 4)
1777 continue;
1778
1779 free(fpath);
1780 fpath = NULL;
23a177ef 1781 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
2c4104f0
LP		 1782 r = -ENOMEM;
1783 goto finish;
1784 }
1785
1786 if (access(fpath, X_OK) < 0) {
1787
1788 if (errno != ENOENT)
1789 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1790
1791 continue;
1792 }
1793
1794 free(name);
1795 name = NULL;
1796 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1797 r = -ENOMEM;
1798 goto finish;
1799 }
1800
1801 if ((r = manager_load_unit(m, name, &service)) < 0)
1802 goto finish;
1803
23a177ef 1804 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
2c4104f0
LP		 1805 goto finish;
1806
1807 if (de->d_name[0] == 'S') {
1808 if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1809 goto finish;
1810
1811 if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1812 goto finish;
23a177ef
LP		 1813
1814 } else if (de->d_name[0] == 'K' &&
1815 (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1816 streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1817
1818 /* We honour K links only for
1819 * halt/reboot. For the normal
1820 * runlevels we assume the
1821 * stop jobs will be
1822 * implicitly added by the
1823 * core logic. */
1824
2c4104f0
LP		 1825 if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1826 goto finish;
1827
1828 if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1829 goto finish;
1830 }
1831 }
1832 }
1833
1834 r = 0;
1835
1836finish:
1837 free(path);
1838 free(fpath);
1839 free(name);
1840 closedir(d);
1841
1842 return r;
1843}
1844
94f04347
LP		 1845static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1846 [SERVICE_DEAD] = "dead",
1847 [SERVICE_START_PRE] = "start-pre",
1848 [SERVICE_START] = "start",
1849 [SERVICE_START_POST] = "start-post",
1850 [SERVICE_RUNNING] = "running",
1851 [SERVICE_RELOAD] = "reload",
1852 [SERVICE_STOP] = "stop",
1853 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1854 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1855 [SERVICE_STOP_POST] = "stop-post",
1856 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1857 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1858 [SERVICE_MAINTAINANCE] = "maintainance",
1859 [SERVICE_AUTO_RESTART] = "auto-restart",
1860};
1861
1862DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1863
1864static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1865 [SERVICE_ONCE] = "once",
1866 [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1867 [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1868};
1869
1870DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1871
1872static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1873 [SERVICE_FORKING] = "forking",
1874 [SERVICE_SIMPLE] = "simple",
1875 [SERVICE_FINISH] = "finish"
1876};
1877
1878DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1879
1880static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1881 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1882 [SERVICE_EXEC_START] = "ExecStart",
1883 [SERVICE_EXEC_START_POST] = "ExecStartPost",
1884 [SERVICE_EXEC_RELOAD] = "ExecReload",
1885 [SERVICE_EXEC_STOP] = "ExecStop",
1886 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1887};
1888
1889DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1890
87f0e418 1891const UnitVTable service_vtable = {
5cb5a6ff
LP		 1892 .suffix = ".service",
1893
034c6ed7
LP		 1894 .init = service_init,
1895 .done = service_done,
1896
5cb5a6ff
LP		 1897 .dump = service_dump,
1898
1899 .start = service_start,
1900 .stop = service_stop,
1901 .reload = service_reload,
1902
034c6ed7
LP		 1903 .can_reload = service_can_reload,
1904
5cb5a6ff
LP		 1905 .active_state = service_active_state,
1906
034c6ed7
LP		 1907 .sigchld_event = service_sigchld_event,
1908 .timer_event = service_timer_event,
2c4104f0 1909
8e274523
LP		 1910 .cgroup_notify_empty = service_cgroup_notify_event,
1911
2c4104f0 1912 .enumerate = service_enumerate
5cb5a6ff 1913};
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