]>
Commit | Line | Data |
---|---|---|
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <signal.h> | |
24 | #include <dirent.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | #include "unit.h" | |
28 | #include "service.h" | |
29 | #include "load-fragment.h" | |
30 | #include "load-dropin.h" | |
31 | #include "log.h" | |
32 | #include "strv.h" | |
33 | ||
34 | #define COMMENTS "#;\n" | |
35 | #define NEWLINES "\n\r" | |
36 | #define LINE_MAX 4096 | |
37 | ||
38 | static const char * const rcnd_table[] = { | |
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 | }; | |
47 | ||
48 | ||
49 | static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = { | |
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, | |
64 | }; | |
65 | ||
66 | static void service_done(Unit *u) { | |
67 | Service *s = SERVICE(u); | |
68 | ||
69 | assert(s); | |
70 | ||
71 | free(s->pid_file); | |
72 | s->pid_file = NULL; | |
73 | ||
74 | free(s->sysv_path); | |
75 | s->sysv_path = NULL; | |
76 | ||
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) { | |
84 | unit_unwatch_pid(u, s->main_pid); | |
85 | s->main_pid = 0; | |
86 | } | |
87 | ||
88 | if (s->control_pid > 0) { | |
89 | unit_unwatch_pid(u, s->control_pid); | |
90 | s->control_pid = 0; | |
91 | } | |
92 | ||
93 | unit_unwatch_timer(u, &s->timer_watch); | |
94 | } | |
95 | ||
96 | static 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 | ||
125 | finish: | |
126 | ||
127 | if (_r) | |
128 | *_r = r; | |
129 | ||
130 | return 1; | |
131 | } | |
132 | ||
133 | static 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 | ||
142 | /* For each pair of services where at least one lacks a LSB | |
143 | * header, we use the start priority value to order things. */ | |
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 | ||
157 | if (s->sysv_has_lsb && t->sysv_has_lsb) | |
158 | continue; | |
159 | ||
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 | ||
176 | static 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 | ||
196 | static 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 | ||
217 | static int priority_from_rcd(Service *s, const char *init_script) { | |
218 | char **p; | |
219 | unsigned i; | |
220 | ||
221 | STRV_FOREACH(p, UNIT(s)->meta.manager->sysrcnd_path) | |
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 | ||
277 | static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *new_state) { | |
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; | |
288 | ||
289 | assert(s); | |
290 | assert(path); | |
291 | assert(new_state); | |
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; | |
329 | s->sysv_has_lsb = true; | |
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 | ||
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 | ||
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 | ||
487 | if (!(r = unit_add_dependency_by_name(u, UNIT_AFTER, m)) < 0) { | |
488 | free(m); | |
489 | goto finish; | |
490 | } | |
491 | ||
492 | r = unit_add_dependency_by_name( | |
493 | u, | |
494 | startswith(t, "Required-Start:") ? UNIT_REQUIRES : UNIT_WANTS, | |
495 | m); | |
496 | free(m); | |
497 | ||
498 | if (r < 0) | |
499 | goto finish; | |
500 | } | |
501 | ||
502 | } else if (startswith(t, "Description:")) { | |
503 | char *d; | |
504 | ||
505 | state = LSB_DESCRIPTION; | |
506 | ||
507 | if (!(d = strdup(strstrip(t+12)))) { | |
508 | r = -ENOMEM; | |
509 | goto finish; | |
510 | } | |
511 | ||
512 | free(u->meta.description); | |
513 | u->meta.description = d; | |
514 | ||
515 | } else if (startswith(t, "Short-Description:") && !u->meta.description) { | |
516 | char *d; | |
517 | ||
518 | /* We use the short description only | |
519 | * if no long description is set. */ | |
520 | ||
521 | state = LSB; | |
522 | ||
523 | if (!(d = strdup(strstrip(t+18)))) { | |
524 | r = -ENOMEM; | |
525 | goto finish; | |
526 | } | |
527 | ||
528 | free(u->meta.description); | |
529 | u->meta.description = d; | |
530 | ||
531 | } else if (state == LSB_DESCRIPTION) { | |
532 | ||
533 | if (startswith(l, "#\t") || startswith(l, "# ")) { | |
534 | char *d; | |
535 | ||
536 | assert(u->meta.description); | |
537 | if (asprintf(&d, "%s %s", u->meta.description, t) < 0) { | |
538 | r = -ENOMEM; | |
539 | goto finish; | |
540 | } | |
541 | ||
542 | free(u->meta.description); | |
543 | u->meta.description = d; | |
544 | } else | |
545 | state = LSB; | |
546 | } | |
547 | } | |
548 | } | |
549 | ||
550 | /* If init scripts have no LSB header, then we enforce the | |
551 | * ordering via the chkconfig priorities. We try to determine | |
552 | * a priority for *all* init scripts here, since they are | |
553 | * needed as soon as at least one non-LSB script is used. */ | |
554 | ||
555 | if (s->sysv_start_priority < 0) { | |
556 | log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u)); | |
557 | ||
558 | if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0) | |
559 | goto finish; | |
560 | ||
561 | if (s->sysv_start_priority < 0) | |
562 | log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u)); | |
563 | } | |
564 | ||
565 | if ((r = sysv_exec_commands(s)) < 0) | |
566 | goto finish; | |
567 | ||
568 | if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_SERVICE)) < 0 || | |
569 | (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_SERVICE)) < 0) | |
570 | goto finish; | |
571 | ||
572 | *new_state = UNIT_LOADED; | |
573 | r = 0; | |
574 | ||
575 | finish: | |
576 | ||
577 | if (f) | |
578 | fclose(f); | |
579 | ||
580 | return r; | |
581 | } | |
582 | ||
583 | static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) { | |
584 | char **p; | |
585 | ||
586 | assert(s); | |
587 | assert(name); | |
588 | ||
589 | STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) { | |
590 | char *path; | |
591 | int r; | |
592 | ||
593 | if (asprintf(&path, "%s/%s", *p, name) < 0) | |
594 | return -ENOMEM; | |
595 | ||
596 | assert(endswith(path, ".service")); | |
597 | path[strlen(path)-8] = 0; | |
598 | ||
599 | r = service_load_sysv_path(s, path, new_state); | |
600 | free(path); | |
601 | ||
602 | if (r < 0) | |
603 | return r; | |
604 | ||
605 | if (*new_state != UNIT_STUB) | |
606 | break; | |
607 | } | |
608 | ||
609 | return 0; | |
610 | } | |
611 | ||
612 | static int service_load_sysv(Service *s, UnitLoadState *new_state) { | |
613 | const char *t; | |
614 | Iterator i; | |
615 | int r; | |
616 | ||
617 | assert(s); | |
618 | assert(new_state); | |
619 | ||
620 | /* Load service data from SysV init scripts, preferably with | |
621 | * LSB headers ... */ | |
622 | ||
623 | if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path)) | |
624 | return 0; | |
625 | ||
626 | if ((t = unit_id(UNIT(s)))) | |
627 | if ((r = service_load_sysv_name(s, t, new_state)) < 0) | |
628 | return r; | |
629 | ||
630 | if (*new_state == UNIT_STUB) | |
631 | SET_FOREACH(t, UNIT(s)->meta.names, i) { | |
632 | if ((r == service_load_sysv_name(s, t, new_state)) < 0) | |
633 | return r; | |
634 | ||
635 | if (*new_state != UNIT_STUB) | |
636 | break; | |
637 | } | |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
642 | static int service_init(Unit *u, UnitLoadState *new_state) { | |
643 | int r; | |
644 | Service *s = SERVICE(u); | |
645 | ||
646 | assert(s); | |
647 | assert(new_state); | |
648 | assert(*new_state == UNIT_STUB); | |
649 | ||
650 | /* First, reset everything to the defaults, in case this is a | |
651 | * reload */ | |
652 | ||
653 | s->type = 0; | |
654 | s->restart = 0; | |
655 | ||
656 | s->timeout_usec = DEFAULT_TIMEOUT_USEC; | |
657 | s->restart_usec = DEFAULT_RESTART_USEC; | |
658 | ||
659 | exec_context_init(&s->exec_context); | |
660 | ||
661 | s->timer_watch.type = WATCH_INVALID; | |
662 | ||
663 | s->state = SERVICE_DEAD; | |
664 | ||
665 | s->sysv_start_priority = -1; | |
666 | s->permissions_start_only = false; | |
667 | s->root_directory_start_only = false; | |
668 | ||
669 | s->sysv_has_lsb = false; | |
670 | ||
671 | RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5); | |
672 | ||
673 | /* Load a .service file */ | |
674 | if ((r = unit_load_fragment(u, new_state)) < 0) | |
675 | return r; | |
676 | ||
677 | /* Load a classic init script as a fallback, if we couldn't find anything */ | |
678 | if (*new_state == UNIT_STUB) | |
679 | if ((r = service_load_sysv(s, new_state)) < 0) | |
680 | return r; | |
681 | ||
682 | /* Still nothing found? Then let's give up */ | |
683 | if (*new_state == UNIT_STUB) | |
684 | return -ENOENT; | |
685 | ||
686 | /* We were able to load something, then let's add in the | |
687 | * dropin directories. */ | |
688 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
689 | return r; | |
690 | ||
691 | /* This is a new unit? Then let's add in some extras */ | |
692 | if (*new_state == UNIT_LOADED) { | |
693 | if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0) | |
694 | return r; | |
695 | ||
696 | if ((r = unit_add_default_cgroup(u)) < 0) | |
697 | return r; | |
698 | ||
699 | if ((r = sysv_chkconfig_order(s)) < 0) | |
700 | return r; | |
701 | } | |
702 | ||
703 | return 0; | |
704 | } | |
705 | ||
706 | static void service_dump(Unit *u, FILE *f, const char *prefix) { | |
707 | ||
708 | ServiceExecCommand c; | |
709 | Service *s = SERVICE(u); | |
710 | const char *prefix2; | |
711 | char *p2; | |
712 | ||
713 | assert(s); | |
714 | ||
715 | p2 = strappend(prefix, "\t"); | |
716 | prefix2 = p2 ? p2 : prefix; | |
717 | ||
718 | fprintf(f, | |
719 | "%sService State: %s\n" | |
720 | "%sPermissionsStartOnly: %s\n" | |
721 | "%sRootDirectoryStartOnly: %s\n" | |
722 | "%sValidNoProcess: %s\n" | |
723 | "%sType: %s\n", | |
724 | prefix, service_state_to_string(s->state), | |
725 | prefix, yes_no(s->permissions_start_only), | |
726 | prefix, yes_no(s->root_directory_start_only), | |
727 | prefix, yes_no(s->valid_no_process), | |
728 | prefix, service_type_to_string(s->type)); | |
729 | ||
730 | if (s->pid_file) | |
731 | fprintf(f, | |
732 | "%sPIDFile: %s\n", | |
733 | prefix, s->pid_file); | |
734 | ||
735 | exec_context_dump(&s->exec_context, f, prefix); | |
736 | ||
737 | for (c = 0; c < _SERVICE_EXEC_MAX; c++) { | |
738 | ||
739 | if (!s->exec_command[c]) | |
740 | continue; | |
741 | ||
742 | fprintf(f, "%s→ %s:\n", | |
743 | prefix, service_exec_command_to_string(c)); | |
744 | ||
745 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
746 | } | |
747 | ||
748 | if (s->sysv_path) | |
749 | fprintf(f, | |
750 | "%sSysV Init Script Path: %s\n" | |
751 | "%sSysV Init Script has LSB Header: %s\n", | |
752 | prefix, s->sysv_path, | |
753 | prefix, yes_no(s->sysv_has_lsb)); | |
754 | ||
755 | if (s->sysv_start_priority >= 0) | |
756 | fprintf(f, | |
757 | "%sSysVStartPriority: %i\n", | |
758 | prefix, s->sysv_start_priority); | |
759 | ||
760 | ||
761 | free(p2); | |
762 | } | |
763 | ||
764 | static int service_load_pid_file(Service *s) { | |
765 | char *k; | |
766 | unsigned long p; | |
767 | int r; | |
768 | ||
769 | assert(s); | |
770 | ||
771 | if (s->main_pid_known) | |
772 | return 0; | |
773 | ||
774 | if (!s->pid_file) | |
775 | return -ENOENT; | |
776 | ||
777 | if ((r = read_one_line_file(s->pid_file, &k)) < 0) | |
778 | return r; | |
779 | ||
780 | if ((r = safe_atolu(k, &p)) < 0) { | |
781 | free(k); | |
782 | return r; | |
783 | } | |
784 | ||
785 | if ((unsigned long) (pid_t) p != p) | |
786 | return -ERANGE; | |
787 | ||
788 | s->main_pid = p; | |
789 | s->main_pid_known = true; | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
794 | static int service_get_sockets(Service *s, Set **_set) { | |
795 | Set *set; | |
796 | Iterator i; | |
797 | char *t; | |
798 | int r; | |
799 | ||
800 | assert(s); | |
801 | assert(_set); | |
802 | ||
803 | /* Collects all Socket objects that belong to this | |
804 | * service. Note that a service might have multiple sockets | |
805 | * via multiple names. */ | |
806 | ||
807 | if (!(set = set_new(NULL, NULL))) | |
808 | return -ENOMEM; | |
809 | ||
810 | SET_FOREACH(t, UNIT(s)->meta.names, i) { | |
811 | char *k; | |
812 | Unit *p; | |
813 | ||
814 | /* Look for all socket objects that go by any of our | |
815 | * units and collect their fds */ | |
816 | ||
817 | if (!(k = unit_name_change_suffix(t, ".socket"))) { | |
818 | r = -ENOMEM; | |
819 | goto fail; | |
820 | } | |
821 | ||
822 | p = manager_get_unit(UNIT(s)->meta.manager, k); | |
823 | free(k); | |
824 | ||
825 | if (!p) continue; | |
826 | ||
827 | if ((r = set_put(set, p)) < 0) | |
828 | goto fail; | |
829 | } | |
830 | ||
831 | *_set = set; | |
832 | return 0; | |
833 | ||
834 | fail: | |
835 | set_free(set); | |
836 | return r; | |
837 | } | |
838 | ||
839 | ||
840 | static int service_notify_sockets(Service *s) { | |
841 | Iterator i; | |
842 | Set *set; | |
843 | Socket *sock; | |
844 | int r; | |
845 | ||
846 | assert(s); | |
847 | ||
848 | /* Notifies all our sockets when we die */ | |
849 | ||
850 | if ((r = service_get_sockets(s, &set)) < 0) | |
851 | return r; | |
852 | ||
853 | SET_FOREACH(sock, set, i) | |
854 | socket_notify_service_dead(sock); | |
855 | ||
856 | set_free(set); | |
857 | ||
858 | return 0; | |
859 | } | |
860 | ||
861 | static void service_set_state(Service *s, ServiceState state) { | |
862 | ServiceState old_state; | |
863 | assert(s); | |
864 | ||
865 | old_state = s->state; | |
866 | s->state = state; | |
867 | ||
868 | if (state != SERVICE_START_PRE && | |
869 | state != SERVICE_START && | |
870 | state != SERVICE_START_POST && | |
871 | state != SERVICE_RELOAD && | |
872 | state != SERVICE_STOP && | |
873 | state != SERVICE_STOP_SIGTERM && | |
874 | state != SERVICE_STOP_SIGKILL && | |
875 | state != SERVICE_STOP_POST && | |
876 | state != SERVICE_FINAL_SIGTERM && | |
877 | state != SERVICE_FINAL_SIGKILL && | |
878 | state != SERVICE_AUTO_RESTART) | |
879 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
880 | ||
881 | if (state != SERVICE_START && | |
882 | state != SERVICE_START_POST && | |
883 | state != SERVICE_RUNNING && | |
884 | state != SERVICE_RELOAD && | |
885 | state != SERVICE_STOP && | |
886 | state != SERVICE_STOP_SIGTERM && | |
887 | state != SERVICE_STOP_SIGKILL) | |
888 | if (s->main_pid > 0) { | |
889 | unit_unwatch_pid(UNIT(s), s->main_pid); | |
890 | s->main_pid = 0; | |
891 | } | |
892 | ||
893 | if (state != SERVICE_START_PRE && | |
894 | state != SERVICE_START && | |
895 | state != SERVICE_START_POST && | |
896 | state != SERVICE_RELOAD && | |
897 | state != SERVICE_STOP && | |
898 | state != SERVICE_STOP_SIGTERM && | |
899 | state != SERVICE_STOP_SIGKILL && | |
900 | state != SERVICE_STOP_POST && | |
901 | state != SERVICE_FINAL_SIGTERM && | |
902 | state != SERVICE_FINAL_SIGKILL) | |
903 | if (s->control_pid > 0) { | |
904 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
905 | s->control_pid = 0; | |
906 | } | |
907 | ||
908 | if (state != SERVICE_START_PRE && | |
909 | state != SERVICE_START && | |
910 | state != SERVICE_START_POST && | |
911 | state != SERVICE_RELOAD && | |
912 | state != SERVICE_STOP && | |
913 | state != SERVICE_STOP_POST) | |
914 | s->control_command = NULL; | |
915 | ||
916 | if (state == SERVICE_DEAD || | |
917 | state == SERVICE_STOP || | |
918 | state == SERVICE_STOP_SIGTERM || | |
919 | state == SERVICE_STOP_SIGKILL || | |
920 | state == SERVICE_STOP_POST || | |
921 | state == SERVICE_FINAL_SIGTERM || | |
922 | state == SERVICE_FINAL_SIGKILL || | |
923 | state == SERVICE_MAINTAINANCE || | |
924 | state == SERVICE_AUTO_RESTART) | |
925 | service_notify_sockets(s); | |
926 | ||
927 | log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state)); | |
928 | ||
929 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); | |
930 | } | |
931 | ||
932 | static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) { | |
933 | Iterator i; | |
934 | int r; | |
935 | int *rfds = NULL; | |
936 | unsigned rn_fds = 0; | |
937 | Set *set; | |
938 | Socket *sock; | |
939 | ||
940 | assert(s); | |
941 | assert(fds); | |
942 | assert(n_fds); | |
943 | ||
944 | if ((r = service_get_sockets(s, &set)) < 0) | |
945 | return r; | |
946 | ||
947 | SET_FOREACH(sock, set, i) { | |
948 | int *cfds; | |
949 | unsigned cn_fds; | |
950 | ||
951 | if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0) | |
952 | goto fail; | |
953 | ||
954 | if (!cfds) | |
955 | continue; | |
956 | ||
957 | if (!rfds) { | |
958 | rfds = cfds; | |
959 | rn_fds = cn_fds; | |
960 | } else { | |
961 | int *t; | |
962 | ||
963 | if (!(t = new(int, rn_fds+cn_fds))) { | |
964 | free(cfds); | |
965 | r = -ENOMEM; | |
966 | goto fail; | |
967 | } | |
968 | ||
969 | memcpy(t, rfds, rn_fds); | |
970 | memcpy(t+rn_fds, cfds, cn_fds); | |
971 | free(rfds); | |
972 | free(cfds); | |
973 | ||
974 | rfds = t; | |
975 | rn_fds = rn_fds+cn_fds; | |
976 | } | |
977 | } | |
978 | ||
979 | *fds = rfds; | |
980 | *n_fds = rn_fds; | |
981 | ||
982 | set_free(set); | |
983 | ||
984 | return 0; | |
985 | ||
986 | fail: | |
987 | set_free(set); | |
988 | free(rfds); | |
989 | ||
990 | return r; | |
991 | } | |
992 | ||
993 | static int service_spawn( | |
994 | Service *s, | |
995 | ExecCommand *c, | |
996 | bool timeout, | |
997 | bool pass_fds, | |
998 | bool apply_permissions, | |
999 | bool apply_chroot, | |
1000 | pid_t *_pid) { | |
1001 | ||
1002 | pid_t pid; | |
1003 | int r; | |
1004 | int *fds = NULL; | |
1005 | unsigned n_fds = 0; | |
1006 | ||
1007 | assert(s); | |
1008 | assert(c); | |
1009 | assert(_pid); | |
1010 | ||
1011 | if (pass_fds) | |
1012 | if ((r = service_collect_fds(s, &fds, &n_fds)) < 0) | |
1013 | goto fail; | |
1014 | ||
1015 | if (timeout) { | |
1016 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) | |
1017 | goto fail; | |
1018 | } else | |
1019 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
1020 | ||
1021 | if ((r = exec_spawn(c, | |
1022 | &s->exec_context, | |
1023 | fds, n_fds, | |
1024 | apply_permissions, | |
1025 | apply_chroot, | |
1026 | UNIT(s)->meta.cgroup_bondings, | |
1027 | &pid)) < 0) | |
1028 | goto fail; | |
1029 | ||
1030 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) | |
1031 | /* FIXME: we need to do something here */ | |
1032 | goto fail; | |
1033 | ||
1034 | free(fds); | |
1035 | *_pid = pid; | |
1036 | ||
1037 | return 0; | |
1038 | ||
1039 | fail: | |
1040 | free(fds); | |
1041 | ||
1042 | if (timeout) | |
1043 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
1044 | ||
1045 | return r; | |
1046 | } | |
1047 | ||
1048 | static void service_enter_dead(Service *s, bool success, bool allow_restart) { | |
1049 | int r; | |
1050 | assert(s); | |
1051 | ||
1052 | if (!success) | |
1053 | s->failure = true; | |
1054 | ||
1055 | if (allow_restart && | |
1056 | (s->restart == SERVICE_RESTART_ALWAYS || | |
1057 | (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) { | |
1058 | ||
1059 | if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0) | |
1060 | goto fail; | |
1061 | ||
1062 | service_set_state(s, SERVICE_AUTO_RESTART); | |
1063 | } else | |
1064 | service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD); | |
1065 | ||
1066 | return; | |
1067 | ||
1068 | fail: | |
1069 | log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r)); | |
1070 | service_enter_dead(s, false, false); | |
1071 | } | |
1072 | ||
1073 | static void service_enter_signal(Service *s, ServiceState state, bool success); | |
1074 | ||
1075 | static void service_enter_stop_post(Service *s, bool success) { | |
1076 | int r; | |
1077 | assert(s); | |
1078 | ||
1079 | if (!success) | |
1080 | s->failure = true; | |
1081 | ||
1082 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) | |
1083 | if ((r = service_spawn(s, | |
1084 | s->control_command, | |
1085 | true, | |
1086 | false, | |
1087 | !s->permissions_start_only, | |
1088 | !s->root_directory_start_only, | |
1089 | &s->control_pid)) < 0) | |
1090 | goto fail; | |
1091 | ||
1092 | ||
1093 | service_set_state(s, SERVICE_STOP_POST); | |
1094 | ||
1095 | if (!s->control_command) | |
1096 | service_enter_dead(s, true, true); | |
1097 | ||
1098 | return; | |
1099 | ||
1100 | fail: | |
1101 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); | |
1102 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
1103 | } | |
1104 | ||
1105 | static void service_enter_signal(Service *s, ServiceState state, bool success) { | |
1106 | int r; | |
1107 | bool sent = false; | |
1108 | ||
1109 | assert(s); | |
1110 | ||
1111 | if (!success) | |
1112 | s->failure = true; | |
1113 | ||
1114 | if (s->main_pid > 0 || s->control_pid > 0) { | |
1115 | int sig; | |
1116 | ||
1117 | sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL; | |
1118 | ||
1119 | r = 0; | |
1120 | if (s->main_pid > 0) { | |
1121 | if (kill(s->main_pid, sig) < 0 && errno != ESRCH) | |
1122 | r = -errno; | |
1123 | else | |
1124 | sent = true; | |
1125 | } | |
1126 | ||
1127 | if (s->control_pid > 0) { | |
1128 | if (kill(s->control_pid, sig) < 0 && errno != ESRCH) | |
1129 | r = -errno; | |
1130 | else | |
1131 | sent = true; | |
1132 | } | |
1133 | ||
1134 | if (r < 0) | |
1135 | goto fail; | |
1136 | } | |
1137 | ||
1138 | service_set_state(s, state); | |
1139 | ||
1140 | if (s->main_pid <= 0 && s->control_pid <= 0) | |
1141 | service_enter_dead(s, true, true); | |
1142 | ||
1143 | return; | |
1144 | ||
1145 | fail: | |
1146 | log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r)); | |
1147 | ||
1148 | if (sent) { | |
1149 | s->failure = true; | |
1150 | service_set_state(s, state); | |
1151 | } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) | |
1152 | service_enter_stop_post(s, false); | |
1153 | else | |
1154 | service_enter_dead(s, false, true); | |
1155 | } | |
1156 | ||
1157 | static void service_enter_stop(Service *s, bool success) { | |
1158 | int r; | |
1159 | assert(s); | |
1160 | ||
1161 | if (!success) | |
1162 | s->failure = true; | |
1163 | ||
1164 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) | |
1165 | if ((r = service_spawn(s, | |
1166 | s->control_command, | |
1167 | true, | |
1168 | false, | |
1169 | !s->permissions_start_only, | |
1170 | !s->root_directory_start_only, | |
1171 | &s->control_pid)) < 0) | |
1172 | goto fail; | |
1173 | ||
1174 | service_set_state(s, SERVICE_STOP); | |
1175 | ||
1176 | if (!s->control_command) | |
1177 | service_enter_signal(s, SERVICE_STOP_SIGTERM, true); | |
1178 | ||
1179 | return; | |
1180 | ||
1181 | fail: | |
1182 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); | |
1183 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); | |
1184 | } | |
1185 | ||
1186 | static void service_enter_start_post(Service *s) { | |
1187 | int r; | |
1188 | assert(s); | |
1189 | ||
1190 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) | |
1191 | if ((r = service_spawn(s, | |
1192 | s->control_command, | |
1193 | true, | |
1194 | false, | |
1195 | !s->permissions_start_only, | |
1196 | !s->root_directory_start_only, | |
1197 | &s->control_pid)) < 0) | |
1198 | goto fail; | |
1199 | ||
1200 | ||
1201 | service_set_state(s, SERVICE_START_POST); | |
1202 | ||
1203 | if (!s->control_command) | |
1204 | service_set_state(s, SERVICE_RUNNING); | |
1205 | ||
1206 | return; | |
1207 | ||
1208 | fail: | |
1209 | log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r)); | |
1210 | service_enter_stop(s, false); | |
1211 | } | |
1212 | ||
1213 | static void service_enter_start(Service *s) { | |
1214 | pid_t pid; | |
1215 | int r; | |
1216 | ||
1217 | assert(s); | |
1218 | ||
1219 | assert(s->exec_command[SERVICE_EXEC_START]); | |
1220 | assert(!s->exec_command[SERVICE_EXEC_START]->command_next); | |
1221 | ||
1222 | if ((r = service_spawn(s, | |
1223 | s->exec_command[SERVICE_EXEC_START], | |
1224 | s->type == SERVICE_FORKING, | |
1225 | true, | |
1226 | true, | |
1227 | true, | |
1228 | &pid)) < 0) | |
1229 | goto fail; | |
1230 | ||
1231 | service_set_state(s, SERVICE_START); | |
1232 | ||
1233 | if (s->type == SERVICE_SIMPLE) { | |
1234 | /* For simple services we immediately start | |
1235 | * the START_POST binaries. */ | |
1236 | ||
1237 | s->main_pid = pid; | |
1238 | s->main_pid_known = true; | |
1239 | service_enter_start_post(s); | |
1240 | ||
1241 | } else if (s->type == SERVICE_FORKING) { | |
1242 | ||
1243 | /* For forking services we wait until the start | |
1244 | * process exited. */ | |
1245 | ||
1246 | s->control_pid = pid; | |
1247 | s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
1248 | } else if (s->type == SERVICE_FINISH) { | |
1249 | ||
1250 | /* For finishing services we wait until the start | |
1251 | * process exited, too, but it is our main process. */ | |
1252 | ||
1253 | s->main_pid = pid; | |
1254 | s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
1255 | } else | |
1256 | assert_not_reached("Unknown service type"); | |
1257 | ||
1258 | return; | |
1259 | ||
1260 | fail: | |
1261 | log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r)); | |
1262 | service_enter_stop(s, false); | |
1263 | } | |
1264 | ||
1265 | static void service_enter_start_pre(Service *s) { | |
1266 | int r; | |
1267 | ||
1268 | assert(s); | |
1269 | ||
1270 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) | |
1271 | if ((r = service_spawn(s, | |
1272 | s->control_command, | |
1273 | true, | |
1274 | false, | |
1275 | !s->permissions_start_only, | |
1276 | !s->root_directory_start_only, | |
1277 | &s->control_pid)) < 0) | |
1278 | goto fail; | |
1279 | ||
1280 | service_set_state(s, SERVICE_START_PRE); | |
1281 | ||
1282 | if (!s->control_command) | |
1283 | service_enter_start(s); | |
1284 | ||
1285 | return; | |
1286 | ||
1287 | fail: | |
1288 | log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r)); | |
1289 | service_enter_dead(s, false, true); | |
1290 | } | |
1291 | ||
1292 | static void service_enter_restart(Service *s) { | |
1293 | int r; | |
1294 | assert(s); | |
1295 | ||
1296 | if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0) | |
1297 | goto fail; | |
1298 | ||
1299 | log_debug("%s scheduled restart job.", unit_id(UNIT(s))); | |
1300 | service_enter_dead(s, true, false); | |
1301 | return; | |
1302 | ||
1303 | fail: | |
1304 | ||
1305 | log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r)); | |
1306 | service_enter_dead(s, false, false); | |
1307 | } | |
1308 | ||
1309 | static void service_enter_reload(Service *s) { | |
1310 | int r; | |
1311 | ||
1312 | assert(s); | |
1313 | ||
1314 | if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) | |
1315 | if ((r = service_spawn(s, | |
1316 | s->control_command, | |
1317 | true, | |
1318 | false, | |
1319 | !s->permissions_start_only, | |
1320 | !s->root_directory_start_only, | |
1321 | &s->control_pid)) < 0) | |
1322 | goto fail; | |
1323 | ||
1324 | service_set_state(s, SERVICE_RELOAD); | |
1325 | ||
1326 | if (!s->control_command) | |
1327 | service_set_state(s, SERVICE_RUNNING); | |
1328 | ||
1329 | return; | |
1330 | ||
1331 | fail: | |
1332 | log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r)); | |
1333 | service_enter_stop(s, false); | |
1334 | } | |
1335 | ||
1336 | static void service_run_next(Service *s, bool success) { | |
1337 | int r; | |
1338 | ||
1339 | assert(s); | |
1340 | assert(s->control_command); | |
1341 | assert(s->control_command->command_next); | |
1342 | ||
1343 | if (!success) | |
1344 | s->failure = true; | |
1345 | ||
1346 | s->control_command = s->control_command->command_next; | |
1347 | ||
1348 | if ((r = service_spawn(s, | |
1349 | s->control_command, | |
1350 | true, | |
1351 | false, | |
1352 | !s->permissions_start_only, | |
1353 | !s->root_directory_start_only, | |
1354 | &s->control_pid)) < 0) | |
1355 | goto fail; | |
1356 | ||
1357 | return; | |
1358 | ||
1359 | fail: | |
1360 | log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r)); | |
1361 | ||
1362 | if (s->state == SERVICE_STOP) | |
1363 | service_enter_stop_post(s, false); | |
1364 | else if (s->state == SERVICE_STOP_POST) | |
1365 | service_enter_dead(s, false, true); | |
1366 | else | |
1367 | service_enter_stop(s, false); | |
1368 | } | |
1369 | ||
1370 | static int service_start(Unit *u) { | |
1371 | Service *s = SERVICE(u); | |
1372 | ||
1373 | assert(s); | |
1374 | ||
1375 | /* We cannot fulfill this request right now, try again later | |
1376 | * please! */ | |
1377 | if (s->state == SERVICE_STOP || | |
1378 | s->state == SERVICE_STOP_SIGTERM || | |
1379 | s->state == SERVICE_STOP_SIGKILL || | |
1380 | s->state == SERVICE_STOP_POST || | |
1381 | s->state == SERVICE_FINAL_SIGTERM || | |
1382 | s->state == SERVICE_FINAL_SIGKILL) | |
1383 | return -EAGAIN; | |
1384 | ||
1385 | /* Already on it! */ | |
1386 | if (s->state == SERVICE_START_PRE || | |
1387 | s->state == SERVICE_START || | |
1388 | s->state == SERVICE_START_POST) | |
1389 | return 0; | |
1390 | ||
1391 | assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART); | |
1392 | ||
1393 | /* Make sure we don't enter a busy loop of some kind. */ | |
1394 | if (!ratelimit_test(&s->ratelimit)) { | |
1395 | log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u)); | |
1396 | return -EAGAIN; | |
1397 | } | |
1398 | ||
1399 | s->failure = false; | |
1400 | s->main_pid_known = false; | |
1401 | ||
1402 | service_enter_start_pre(s); | |
1403 | return 0; | |
1404 | } | |
1405 | ||
1406 | static int service_stop(Unit *u) { | |
1407 | Service *s = SERVICE(u); | |
1408 | ||
1409 | assert(s); | |
1410 | ||
1411 | if (s->state == SERVICE_START_PRE || | |
1412 | s->state == SERVICE_START || | |
1413 | s->state == SERVICE_START_POST || | |
1414 | s->state == SERVICE_RELOAD) | |
1415 | return -EAGAIN; | |
1416 | ||
1417 | if (s->state == SERVICE_AUTO_RESTART) { | |
1418 | service_set_state(s, SERVICE_DEAD); | |
1419 | return 0; | |
1420 | } | |
1421 | ||
1422 | assert(s->state == SERVICE_RUNNING); | |
1423 | ||
1424 | service_enter_stop(s, true); | |
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | static int service_reload(Unit *u) { | |
1429 | Service *s = SERVICE(u); | |
1430 | ||
1431 | assert(s); | |
1432 | ||
1433 | assert(s->state == SERVICE_RUNNING); | |
1434 | ||
1435 | service_enter_reload(s); | |
1436 | return 0; | |
1437 | } | |
1438 | ||
1439 | static bool service_can_reload(Unit *u) { | |
1440 | Service *s = SERVICE(u); | |
1441 | ||
1442 | assert(s); | |
1443 | ||
1444 | return !!s->exec_command[SERVICE_EXEC_RELOAD]; | |
1445 | } | |
1446 | ||
1447 | static UnitActiveState service_active_state(Unit *u) { | |
1448 | assert(u); | |
1449 | ||
1450 | return state_translation_table[SERVICE(u)->state]; | |
1451 | } | |
1452 | ||
1453 | static int main_pid_good(Service *s) { | |
1454 | assert(s); | |
1455 | ||
1456 | /* Returns 0 if the pid is dead, 1 if it is good, -1 if we | |
1457 | * don't know */ | |
1458 | ||
1459 | /* If we know the pid file, then lets just check if it is | |
1460 | * still valid */ | |
1461 | if (s->main_pid_known) | |
1462 | return s->main_pid > 0; | |
1463 | ||
1464 | /* We don't know the pid */ | |
1465 | return -EAGAIN; | |
1466 | } | |
1467 | ||
1468 | static bool control_pid_good(Service *s) { | |
1469 | assert(s); | |
1470 | ||
1471 | return s->control_pid > 0; | |
1472 | } | |
1473 | ||
1474 | static int cgroup_good(Service *s) { | |
1475 | assert(s); | |
1476 | ||
1477 | if (s->valid_no_process) | |
1478 | return -EAGAIN; | |
1479 | ||
1480 | return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings); | |
1481 | } | |
1482 | ||
1483 | static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { | |
1484 | Service *s = SERVICE(u); | |
1485 | bool success; | |
1486 | ||
1487 | assert(s); | |
1488 | assert(pid >= 0); | |
1489 | ||
1490 | success = code == CLD_EXITED && status == 0; | |
1491 | s->failure = s->failure || !success; | |
1492 | ||
1493 | if (s->main_pid == pid) { | |
1494 | ||
1495 | exec_status_fill(&s->main_exec_status, pid, code, status); | |
1496 | s->main_pid = 0; | |
1497 | ||
1498 | if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) { | |
1499 | assert(s->exec_command[SERVICE_EXEC_START]); | |
1500 | s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status; | |
1501 | } | |
1502 | ||
1503 | log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status); | |
1504 | ||
1505 | /* The service exited, so the service is officially | |
1506 | * gone. */ | |
1507 | ||
1508 | switch (s->state) { | |
1509 | ||
1510 | case SERVICE_START_POST: | |
1511 | case SERVICE_RELOAD: | |
1512 | case SERVICE_STOP: | |
1513 | /* Need to wait until the operation is | |
1514 | * done */ | |
1515 | break; | |
1516 | ||
1517 | case SERVICE_START: | |
1518 | assert(s->type == SERVICE_FINISH); | |
1519 | ||
1520 | /* This was our main goal, so let's go on */ | |
1521 | if (success) | |
1522 | service_enter_start_post(s); | |
1523 | else | |
1524 | service_enter_stop(s, false); | |
1525 | break; | |
1526 | ||
1527 | case SERVICE_RUNNING: | |
1528 | service_enter_stop(s, success); | |
1529 | break; | |
1530 | ||
1531 | case SERVICE_STOP_SIGTERM: | |
1532 | case SERVICE_STOP_SIGKILL: | |
1533 | ||
1534 | if (!control_pid_good(s)) | |
1535 | service_enter_stop_post(s, success); | |
1536 | ||
1537 | /* If there is still a control process, wait for that first */ | |
1538 | break; | |
1539 | ||
1540 | default: | |
1541 | assert_not_reached("Uh, main process died at wrong time."); | |
1542 | } | |
1543 | ||
1544 | } else if (s->control_pid == pid) { | |
1545 | assert(s->control_command); | |
1546 | ||
1547 | exec_status_fill(&s->control_command->exec_status, pid, code, status); | |
1548 | s->control_pid = 0; | |
1549 | ||
1550 | log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status); | |
1551 | ||
1552 | /* If we are shutting things down anyway we | |
1553 | * don't care about failing commands. */ | |
1554 | ||
1555 | if (s->control_command->command_next && | |
1556 | (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST))) | |
1557 | ||
1558 | /* There is another command to * | |
1559 | * execute, so let's do that. */ | |
1560 | ||
1561 | service_run_next(s, success); | |
1562 | ||
1563 | else { | |
1564 | /* No further commands for this step, so let's | |
1565 | * figure out what to do next */ | |
1566 | ||
1567 | log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state)); | |
1568 | ||
1569 | switch (s->state) { | |
1570 | ||
1571 | case SERVICE_START_PRE: | |
1572 | if (success) | |
1573 | service_enter_start(s); | |
1574 | else | |
1575 | service_enter_stop(s, false); | |
1576 | break; | |
1577 | ||
1578 | case SERVICE_START: | |
1579 | assert(s->type == SERVICE_FORKING); | |
1580 | ||
1581 | /* Let's try to load the pid | |
1582 | * file here if we can. We | |
1583 | * ignore the return value, | |
1584 | * since the PID file might | |
1585 | * actually be created by a | |
1586 | * START_POST script */ | |
1587 | ||
1588 | if (success) { | |
1589 | if (s->pid_file) | |
1590 | service_load_pid_file(s); | |
1591 | ||
1592 | service_enter_start_post(s); | |
1593 | } else | |
1594 | service_enter_stop(s, false); | |
1595 | ||
1596 | break; | |
1597 | ||
1598 | case SERVICE_START_POST: | |
1599 | if (success && s->pid_file && !s->main_pid_known) { | |
1600 | int r; | |
1601 | ||
1602 | /* Hmm, let's see if we can | |
1603 | * load the pid now after the | |
1604 | * start-post scripts got | |
1605 | * executed. */ | |
1606 | ||
1607 | if ((r = service_load_pid_file(s)) < 0) | |
1608 | log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r)); | |
1609 | } | |
1610 | ||
1611 | /* Fall through */ | |
1612 | ||
1613 | case SERVICE_RELOAD: | |
1614 | if (success) { | |
1615 | if (main_pid_good(s) != 0 && cgroup_good(s) != 0) | |
1616 | service_set_state(s, SERVICE_RUNNING); | |
1617 | else | |
1618 | service_enter_stop(s, true); | |
1619 | } else | |
1620 | service_enter_stop(s, false); | |
1621 | ||
1622 | break; | |
1623 | ||
1624 | case SERVICE_STOP: | |
1625 | if (main_pid_good(s) > 0) | |
1626 | /* Still not dead and we know the PID? Let's go hunting. */ | |
1627 | service_enter_signal(s, SERVICE_STOP_SIGTERM, success); | |
1628 | else | |
1629 | service_enter_stop_post(s, success); | |
1630 | break; | |
1631 | ||
1632 | case SERVICE_STOP_SIGTERM: | |
1633 | case SERVICE_STOP_SIGKILL: | |
1634 | if (main_pid_good(s) <= 0) | |
1635 | service_enter_stop_post(s, success); | |
1636 | ||
1637 | /* If there is still a service | |
1638 | * process around, wait until | |
1639 | * that one quit, too */ | |
1640 | break; | |
1641 | ||
1642 | case SERVICE_STOP_POST: | |
1643 | case SERVICE_FINAL_SIGTERM: | |
1644 | case SERVICE_FINAL_SIGKILL: | |
1645 | service_enter_dead(s, success, true); | |
1646 | break; | |
1647 | ||
1648 | default: | |
1649 | assert_not_reached("Uh, control process died at wrong time."); | |
1650 | } | |
1651 | } | |
1652 | } else | |
1653 | assert_not_reached("Got SIGCHLD for unkown PID"); | |
1654 | } | |
1655 | ||
1656 | static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) { | |
1657 | Service *s = SERVICE(u); | |
1658 | ||
1659 | assert(s); | |
1660 | assert(elapsed == 1); | |
1661 | ||
1662 | assert(w == &s->timer_watch); | |
1663 | ||
1664 | switch (s->state) { | |
1665 | ||
1666 | case SERVICE_START_PRE: | |
1667 | case SERVICE_START: | |
1668 | case SERVICE_START_POST: | |
1669 | case SERVICE_RELOAD: | |
1670 | log_warning("%s operation timed out. Stopping.", unit_id(u)); | |
1671 | service_enter_stop(s, false); | |
1672 | break; | |
1673 | ||
1674 | case SERVICE_STOP: | |
1675 | log_warning("%s stopping timed out. Terminating.", unit_id(u)); | |
1676 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); | |
1677 | break; | |
1678 | ||
1679 | case SERVICE_STOP_SIGTERM: | |
1680 | log_warning("%s stopping timed out. Killing.", unit_id(u)); | |
1681 | service_enter_signal(s, SERVICE_STOP_SIGKILL, false); | |
1682 | break; | |
1683 | ||
1684 | case SERVICE_STOP_SIGKILL: | |
1685 | /* Uh, wie sent a SIGKILL and it is still not gone? | |
1686 | * Must be something we cannot kill, so let's just be | |
1687 | * weirded out and continue */ | |
1688 | ||
1689 | log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u)); | |
1690 | service_enter_stop_post(s, false); | |
1691 | break; | |
1692 | ||
1693 | case SERVICE_STOP_POST: | |
1694 | log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); | |
1695 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
1696 | break; | |
1697 | ||
1698 | case SERVICE_FINAL_SIGTERM: | |
1699 | log_warning("%s stopping timed out (2). Killing.", unit_id(u)); | |
1700 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, false); | |
1701 | break; | |
1702 | ||
1703 | case SERVICE_FINAL_SIGKILL: | |
1704 | log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); | |
1705 | service_enter_dead(s, false, true); | |
1706 | break; | |
1707 | ||
1708 | case SERVICE_AUTO_RESTART: | |
1709 | log_debug("%s holdoff time over, scheduling restart.", unit_id(u)); | |
1710 | service_enter_restart(s); | |
1711 | break; | |
1712 | ||
1713 | default: | |
1714 | assert_not_reached("Timeout at wrong time."); | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | static void service_cgroup_notify_event(Unit *u) { | |
1719 | Service *s = SERVICE(u); | |
1720 | ||
1721 | assert(u); | |
1722 | ||
1723 | log_debug("%s: cgroup is empty", unit_id(u)); | |
1724 | ||
1725 | switch (s->state) { | |
1726 | ||
1727 | /* Waiting for SIGCHLD is usually more interesting, | |
1728 | * because it includes return codes/signals. Which is | |
1729 | * why we ignore the cgroup events for most cases, | |
1730 | * except when we don't know pid which to expect the | |
1731 | * SIGCHLD for. */ | |
1732 | ||
1733 | case SERVICE_RUNNING: | |
1734 | ||
1735 | if (!s->valid_no_process && main_pid_good(s) <= 0) | |
1736 | service_enter_stop(s, true); | |
1737 | ||
1738 | break; | |
1739 | ||
1740 | default: | |
1741 | ; | |
1742 | } | |
1743 | } | |
1744 | ||
1745 | static int service_enumerate(Manager *m) { | |
1746 | char **p; | |
1747 | unsigned i; | |
1748 | DIR *d = NULL; | |
1749 | char *path = NULL, *fpath = NULL, *name = NULL; | |
1750 | int r; | |
1751 | ||
1752 | assert(m); | |
1753 | ||
1754 | STRV_FOREACH(p, m->sysvinit_path) | |
1755 | for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) { | |
1756 | struct dirent *de; | |
1757 | ||
1758 | free(path); | |
1759 | path = NULL; | |
1760 | if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) { | |
1761 | r = -ENOMEM; | |
1762 | goto finish; | |
1763 | } | |
1764 | ||
1765 | if (d) | |
1766 | closedir(d); | |
1767 | ||
1768 | if (!(d = opendir(path))) { | |
1769 | if (errno != ENOENT) | |
1770 | log_warning("opendir() failed on %s: %s", path, strerror(errno)); | |
1771 | ||
1772 | continue; | |
1773 | } | |
1774 | ||
1775 | while ((de = readdir(d))) { | |
1776 | Unit *runlevel, *service; | |
1777 | ||
1778 | if (ignore_file(de->d_name)) | |
1779 | continue; | |
1780 | ||
1781 | if (de->d_name[0] != 'S' && de->d_name[0] != 'K') | |
1782 | continue; | |
1783 | ||
1784 | if (strlen(de->d_name) < 4) | |
1785 | continue; | |
1786 | ||
1787 | free(fpath); | |
1788 | fpath = NULL; | |
1789 | if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) { | |
1790 | r = -ENOMEM; | |
1791 | goto finish; | |
1792 | } | |
1793 | ||
1794 | if (access(fpath, X_OK) < 0) { | |
1795 | ||
1796 | if (errno != ENOENT) | |
1797 | log_warning("access() failed on %s: %s", fpath, strerror(errno)); | |
1798 | ||
1799 | continue; | |
1800 | } | |
1801 | ||
1802 | free(name); | |
1803 | name = NULL; | |
1804 | if (asprintf(&name, "%s.service", de->d_name+3) < 0) { | |
1805 | r = -ENOMEM; | |
1806 | goto finish; | |
1807 | } | |
1808 | ||
1809 | if ((r = manager_load_unit(m, name, &service)) < 0) | |
1810 | goto finish; | |
1811 | ||
1812 | if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0) | |
1813 | goto finish; | |
1814 | ||
1815 | if (de->d_name[0] == 'S') { | |
1816 | if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0) | |
1817 | goto finish; | |
1818 | ||
1819 | if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0) | |
1820 | goto finish; | |
1821 | ||
1822 | } else if (de->d_name[0] == 'K' && | |
1823 | (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) || | |
1824 | streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) { | |
1825 | ||
1826 | /* We honour K links only for | |
1827 | * halt/reboot. For the normal | |
1828 | * runlevels we assume the | |
1829 | * stop jobs will be | |
1830 | * implicitly added by the | |
1831 | * core logic. */ | |
1832 | ||
1833 | if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0) | |
1834 | goto finish; | |
1835 | ||
1836 | if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0) | |
1837 | goto finish; | |
1838 | } | |
1839 | } | |
1840 | } | |
1841 | ||
1842 | r = 0; | |
1843 | ||
1844 | finish: | |
1845 | free(path); | |
1846 | free(fpath); | |
1847 | free(name); | |
1848 | closedir(d); | |
1849 | ||
1850 | return r; | |
1851 | } | |
1852 | ||
1853 | static const char* const service_state_table[_SERVICE_STATE_MAX] = { | |
1854 | [SERVICE_DEAD] = "dead", | |
1855 | [SERVICE_START_PRE] = "start-pre", | |
1856 | [SERVICE_START] = "start", | |
1857 | [SERVICE_START_POST] = "start-post", | |
1858 | [SERVICE_RUNNING] = "running", | |
1859 | [SERVICE_RELOAD] = "reload", | |
1860 | [SERVICE_STOP] = "stop", | |
1861 | [SERVICE_STOP_SIGTERM] = "stop-sigterm", | |
1862 | [SERVICE_STOP_SIGKILL] = "stop-sigkill", | |
1863 | [SERVICE_STOP_POST] = "stop-post", | |
1864 | [SERVICE_FINAL_SIGTERM] = "final-sigterm", | |
1865 | [SERVICE_FINAL_SIGKILL] = "final-sigkill", | |
1866 | [SERVICE_MAINTAINANCE] = "maintainance", | |
1867 | [SERVICE_AUTO_RESTART] = "auto-restart", | |
1868 | }; | |
1869 | ||
1870 | DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState); | |
1871 | ||
1872 | static const char* const service_restart_table[_SERVICE_RESTART_MAX] = { | |
1873 | [SERVICE_ONCE] = "once", | |
1874 | [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success", | |
1875 | [SERVICE_RESTART_ALWAYS] = "restart-on-failure", | |
1876 | }; | |
1877 | ||
1878 | DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart); | |
1879 | ||
1880 | static const char* const service_type_table[_SERVICE_TYPE_MAX] = { | |
1881 | [SERVICE_FORKING] = "forking", | |
1882 | [SERVICE_SIMPLE] = "simple", | |
1883 | [SERVICE_FINISH] = "finish" | |
1884 | }; | |
1885 | ||
1886 | DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType); | |
1887 | ||
1888 | static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = { | |
1889 | [SERVICE_EXEC_START_PRE] = "ExecStartPre", | |
1890 | [SERVICE_EXEC_START] = "ExecStart", | |
1891 | [SERVICE_EXEC_START_POST] = "ExecStartPost", | |
1892 | [SERVICE_EXEC_RELOAD] = "ExecReload", | |
1893 | [SERVICE_EXEC_STOP] = "ExecStop", | |
1894 | [SERVICE_EXEC_STOP_POST] = "ExecStopPost", | |
1895 | }; | |
1896 | ||
1897 | DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand); | |
1898 | ||
1899 | const UnitVTable service_vtable = { | |
1900 | .suffix = ".service", | |
1901 | ||
1902 | .init = service_init, | |
1903 | .done = service_done, | |
1904 | ||
1905 | .dump = service_dump, | |
1906 | ||
1907 | .start = service_start, | |
1908 | .stop = service_stop, | |
1909 | .reload = service_reload, | |
1910 | ||
1911 | .can_reload = service_can_reload, | |
1912 | ||
1913 | .active_state = service_active_state, | |
1914 | ||
1915 | .sigchld_event = service_sigchld_event, | |
1916 | .timer_event = service_timer_event, | |
1917 | ||
1918 | .cgroup_notify_empty = service_cgroup_notify_event, | |
1919 | ||
1920 | .enumerate = service_enumerate | |
1921 | }; |