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Commit | Line | Data |
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87f0e418 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 | ||
87f0e418 LP |
22 | #include <assert.h> |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <sys/epoll.h> | |
26 | #include <sys/timerfd.h> | |
27 | #include <sys/poll.h> | |
0301abf4 LP |
28 | #include <stdlib.h> |
29 | #include <unistd.h> | |
87f0e418 LP |
30 | |
31 | #include "set.h" | |
32 | #include "unit.h" | |
33 | #include "macro.h" | |
34 | #include "strv.h" | |
35 | #include "load-fragment.h" | |
36 | #include "load-dropin.h" | |
37 | #include "log.h" | |
9e2f7c11 LP |
38 | #include "unit-name.h" |
39 | #include "specifier.h" | |
4139c1b2 | 40 | #include "dbus-unit.h" |
514f4ef5 | 41 | #include "special.h" |
87f0e418 LP |
42 | |
43 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
44 | [UNIT_SERVICE] = &service_vtable, | |
45 | [UNIT_TIMER] = &timer_vtable, | |
46 | [UNIT_SOCKET] = &socket_vtable, | |
47 | [UNIT_TARGET] = &target_vtable, | |
48 | [UNIT_DEVICE] = &device_vtable, | |
49 | [UNIT_MOUNT] = &mount_vtable, | |
50 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 51 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
52 | [UNIT_SWAP] = &swap_vtable, |
53 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
54 | }; |
55 | ||
87f0e418 LP |
56 | Unit *unit_new(Manager *m) { |
57 | Unit *u; | |
58 | ||
59 | assert(m); | |
60 | ||
61 | if (!(u = new0(Unit, 1))) | |
62 | return NULL; | |
63 | ||
64 | if (!(u->meta.names = set_new(string_hash_func, string_compare_func))) { | |
65 | free(u); | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | u->meta.manager = m; | |
70 | u->meta.type = _UNIT_TYPE_INVALID; | |
cca098b0 | 71 | u->meta.deserialized_job = _JOB_TYPE_INVALID; |
87f0e418 LP |
72 | |
73 | return u; | |
74 | } | |
75 | ||
f278026d LP |
76 | bool unit_has_name(Unit *u, const char *name) { |
77 | assert(u); | |
78 | assert(name); | |
79 | ||
80 | return !!set_get(u->meta.names, (char*) name); | |
81 | } | |
82 | ||
87f0e418 LP |
83 | int unit_add_name(Unit *u, const char *text) { |
84 | UnitType t; | |
9e2f7c11 | 85 | char *s = NULL, *i = NULL; |
87f0e418 LP |
86 | int r; |
87 | ||
88 | assert(u); | |
89 | assert(text); | |
90 | ||
9e2f7c11 LP |
91 | if (unit_name_is_template(text)) { |
92 | if (!u->meta.instance) | |
93 | return -EINVAL; | |
87f0e418 | 94 | |
9e2f7c11 LP |
95 | s = unit_name_replace_instance(text, u->meta.instance); |
96 | } else | |
97 | s = strdup(text); | |
87f0e418 | 98 | |
9e2f7c11 LP |
99 | if (!s) |
100 | return -ENOMEM; | |
87f0e418 | 101 | |
9e2f7c11 LP |
102 | if (!unit_name_is_valid(s)) { |
103 | r = -EINVAL; | |
104 | goto fail; | |
105 | } | |
e537352b | 106 | |
9e2f7c11 | 107 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 108 | |
9e2f7c11 LP |
109 | if (u->meta.type != _UNIT_TYPE_INVALID && t != u->meta.type) { |
110 | r = -EINVAL; | |
111 | goto fail; | |
112 | } | |
87f0e418 | 113 | |
9e2f7c11 LP |
114 | if ((r = unit_name_to_instance(s, &i)) < 0) |
115 | goto fail; | |
87f0e418 | 116 | |
9e2f7c11 LP |
117 | if (i && unit_vtable[t]->no_instances) |
118 | goto fail; | |
119 | ||
120 | if (u->meta.type != _UNIT_TYPE_INVALID && !streq_ptr(u->meta.instance, i)) { | |
121 | r = -EINVAL; | |
122 | goto fail; | |
123 | } | |
124 | ||
125 | if (unit_vtable[t]->no_alias && | |
126 | !set_isempty(u->meta.names) && | |
127 | !set_get(u->meta.names, s)) { | |
128 | r = -EEXIST; | |
129 | goto fail; | |
130 | } | |
131 | ||
4f0f902f LP |
132 | if (hashmap_size(u->meta.manager->units) >= MANAGER_MAX_NAMES) { |
133 | r = -E2BIG; | |
134 | goto fail; | |
135 | } | |
136 | ||
9e2f7c11 LP |
137 | if ((r = set_put(u->meta.names, s)) < 0) { |
138 | if (r == -EEXIST) | |
139 | r = 0; | |
140 | goto fail; | |
87f0e418 LP |
141 | } |
142 | ||
143 | if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) { | |
144 | set_remove(u->meta.names, s); | |
9e2f7c11 | 145 | goto fail; |
87f0e418 LP |
146 | } |
147 | ||
e537352b | 148 | if (u->meta.type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 149 | |
e537352b | 150 | u->meta.type = t; |
9e2f7c11 LP |
151 | u->meta.id = s; |
152 | u->meta.instance = i; | |
153 | ||
154 | LIST_PREPEND(Meta, units_per_type, u->meta.manager->units_per_type[t], &u->meta); | |
e537352b LP |
155 | |
156 | if (UNIT_VTABLE(u)->init) | |
157 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
158 | } else |
159 | free(i); | |
87f0e418 | 160 | |
c1e1601e | 161 | unit_add_to_dbus_queue(u); |
87f0e418 | 162 | return 0; |
9e2f7c11 LP |
163 | |
164 | fail: | |
165 | free(s); | |
166 | free(i); | |
167 | ||
168 | return r; | |
87f0e418 LP |
169 | } |
170 | ||
0ae97ec1 | 171 | int unit_choose_id(Unit *u, const char *name) { |
9e2f7c11 | 172 | char *s, *t = NULL; |
0ae97ec1 LP |
173 | |
174 | assert(u); | |
175 | assert(name); | |
176 | ||
9e2f7c11 LP |
177 | if (unit_name_is_template(name)) { |
178 | ||
179 | if (!u->meta.instance) | |
180 | return -EINVAL; | |
181 | ||
182 | if (!(t = unit_name_replace_instance(name, u->meta.instance))) | |
183 | return -ENOMEM; | |
184 | ||
185 | name = t; | |
186 | } | |
187 | ||
0ae97ec1 | 188 | /* Selects one of the names of this unit as the id */ |
9e2f7c11 LP |
189 | s = set_get(u->meta.names, (char*) name); |
190 | free(t); | |
0ae97ec1 | 191 | |
9e2f7c11 | 192 | if (!s) |
0ae97ec1 LP |
193 | return -ENOENT; |
194 | ||
195 | u->meta.id = s; | |
c1e1601e | 196 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 197 | |
0ae97ec1 LP |
198 | return 0; |
199 | } | |
200 | ||
f50e0a01 LP |
201 | int unit_set_description(Unit *u, const char *description) { |
202 | char *s; | |
203 | ||
204 | assert(u); | |
205 | ||
206 | if (!(s = strdup(description))) | |
207 | return -ENOMEM; | |
208 | ||
209 | free(u->meta.description); | |
210 | u->meta.description = s; | |
c1e1601e LP |
211 | |
212 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
213 | return 0; |
214 | } | |
215 | ||
701cc384 LP |
216 | bool unit_check_gc(Unit *u) { |
217 | assert(u); | |
218 | ||
b86d44e5 LP |
219 | if (u->meta.load_state == UNIT_STUB) |
220 | return true; | |
221 | ||
701cc384 LP |
222 | if (UNIT_VTABLE(u)->no_gc) |
223 | return true; | |
224 | ||
225 | if (u->meta.job) | |
226 | return true; | |
227 | ||
228 | if (unit_active_state(u) != UNIT_INACTIVE) | |
229 | return true; | |
230 | ||
231 | if (UNIT_VTABLE(u)->check_gc) | |
232 | if (UNIT_VTABLE(u)->check_gc(u)) | |
233 | return true; | |
234 | ||
235 | return false; | |
236 | } | |
237 | ||
87f0e418 LP |
238 | void unit_add_to_load_queue(Unit *u) { |
239 | assert(u); | |
819e213f | 240 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 LP |
241 | |
242 | if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue) | |
243 | return; | |
244 | ||
245 | LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
246 | u->meta.in_load_queue = true; | |
247 | } | |
248 | ||
23a177ef LP |
249 | void unit_add_to_cleanup_queue(Unit *u) { |
250 | assert(u); | |
251 | ||
252 | if (u->meta.in_cleanup_queue) | |
253 | return; | |
254 | ||
255 | LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
256 | u->meta.in_cleanup_queue = true; | |
257 | } | |
258 | ||
701cc384 LP |
259 | void unit_add_to_gc_queue(Unit *u) { |
260 | assert(u); | |
261 | ||
262 | if (u->meta.in_gc_queue || u->meta.in_cleanup_queue) | |
263 | return; | |
264 | ||
265 | if (unit_check_gc(u)) | |
266 | return; | |
267 | ||
268 | LIST_PREPEND(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
269 | u->meta.in_gc_queue = true; | |
270 | ||
271 | u->meta.manager->n_in_gc_queue ++; | |
272 | ||
273 | if (u->meta.manager->gc_queue_timestamp <= 0) | |
274 | u->meta.manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
275 | } | |
276 | ||
c1e1601e LP |
277 | void unit_add_to_dbus_queue(Unit *u) { |
278 | assert(u); | |
819e213f | 279 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
c1e1601e | 280 | |
94b6dfa2 | 281 | if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue) |
c1e1601e LP |
282 | return; |
283 | ||
94b6dfa2 LP |
284 | if (set_isempty(u->meta.manager->subscribed)) { |
285 | u->meta.sent_dbus_new_signal = true; | |
286 | return; | |
287 | } | |
288 | ||
c1e1601e LP |
289 | LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); |
290 | u->meta.in_dbus_queue = true; | |
291 | } | |
292 | ||
87f0e418 LP |
293 | static void bidi_set_free(Unit *u, Set *s) { |
294 | Iterator i; | |
295 | Unit *other; | |
296 | ||
297 | assert(u); | |
298 | ||
299 | /* Frees the set and makes sure we are dropped from the | |
300 | * inverse pointers */ | |
301 | ||
302 | SET_FOREACH(other, s, i) { | |
303 | UnitDependency d; | |
304 | ||
305 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
306 | set_remove(other->meta.dependencies[d], u); | |
701cc384 LP |
307 | |
308 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
309 | } |
310 | ||
311 | set_free(s); | |
312 | } | |
313 | ||
314 | void unit_free(Unit *u) { | |
315 | UnitDependency d; | |
316 | Iterator i; | |
317 | char *t; | |
318 | ||
319 | assert(u); | |
320 | ||
c1e1601e LP |
321 | bus_unit_send_removed_signal(u); |
322 | ||
a013b84b LP |
323 | if (u->meta.load_state != UNIT_STUB) |
324 | if (UNIT_VTABLE(u)->done) | |
325 | UNIT_VTABLE(u)->done(u); | |
326 | ||
87f0e418 LP |
327 | SET_FOREACH(t, u->meta.names, i) |
328 | hashmap_remove_value(u->meta.manager->units, t, u); | |
329 | ||
964e0949 LP |
330 | if (u->meta.job) |
331 | job_free(u->meta.job); | |
332 | ||
333 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
334 | bidi_set_free(u, u->meta.dependencies[d]); | |
335 | ||
ef734fd6 LP |
336 | if (u->meta.type != _UNIT_TYPE_INVALID) |
337 | LIST_REMOVE(Meta, units_per_type, u->meta.manager->units_per_type[u->meta.type], &u->meta); | |
338 | ||
87f0e418 LP |
339 | if (u->meta.in_load_queue) |
340 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
341 | ||
c1e1601e LP |
342 | if (u->meta.in_dbus_queue) |
343 | LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
344 | ||
23a177ef LP |
345 | if (u->meta.in_cleanup_queue) |
346 | LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
347 | ||
701cc384 LP |
348 | if (u->meta.in_gc_queue) { |
349 | LIST_REMOVE(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
350 | u->meta.manager->n_in_gc_queue--; | |
351 | } | |
352 | ||
e537352b | 353 | cgroup_bonding_free_list(u->meta.cgroup_bondings); |
87f0e418 | 354 | |
87f0e418 | 355 | free(u->meta.description); |
6be1e7d5 | 356 | free(u->meta.fragment_path); |
87f0e418 | 357 | |
53ec43c6 | 358 | set_free_free(u->meta.names); |
87f0e418 | 359 | |
9e2f7c11 LP |
360 | free(u->meta.instance); |
361 | ||
87f0e418 LP |
362 | free(u); |
363 | } | |
364 | ||
365 | UnitActiveState unit_active_state(Unit *u) { | |
366 | assert(u); | |
367 | ||
368 | if (u->meta.load_state != UNIT_LOADED) | |
369 | return UNIT_INACTIVE; | |
370 | ||
371 | return UNIT_VTABLE(u)->active_state(u); | |
372 | } | |
373 | ||
10a94420 LP |
374 | const char* unit_sub_state_to_string(Unit *u) { |
375 | assert(u); | |
376 | ||
377 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
378 | } | |
379 | ||
23a177ef LP |
380 | static void complete_move(Set **s, Set **other) { |
381 | assert(s); | |
382 | assert(other); | |
87f0e418 | 383 | |
23a177ef LP |
384 | if (!*other) |
385 | return; | |
87f0e418 LP |
386 | |
387 | if (*s) | |
23a177ef LP |
388 | set_move(*s, *other); |
389 | else { | |
390 | *s = *other; | |
391 | *other = NULL; | |
392 | } | |
393 | } | |
87f0e418 | 394 | |
23a177ef LP |
395 | static void merge_names(Unit *u, Unit *other) { |
396 | char *t; | |
397 | Iterator i; | |
87f0e418 | 398 | |
23a177ef LP |
399 | assert(u); |
400 | assert(other); | |
401 | ||
402 | complete_move(&u->meta.names, &other->meta.names); | |
403 | ||
53ec43c6 | 404 | set_free_free(other->meta.names); |
23a177ef LP |
405 | other->meta.names = NULL; |
406 | other->meta.id = NULL; | |
407 | ||
408 | SET_FOREACH(t, u->meta.names, i) | |
409 | assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0); | |
87f0e418 LP |
410 | } |
411 | ||
23a177ef LP |
412 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
413 | Iterator i; | |
414 | Unit *back; | |
87f0e418 | 415 | int r; |
23a177ef LP |
416 | |
417 | assert(u); | |
418 | assert(other); | |
419 | assert(d < _UNIT_DEPENDENCY_MAX); | |
420 | ||
421 | SET_FOREACH(back, other->meta.dependencies[d], i) { | |
422 | UnitDependency k; | |
423 | ||
424 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
425 | if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) { | |
426 | ||
427 | if (r == -EEXIST) | |
428 | set_remove(back->meta.dependencies[k], other); | |
429 | else | |
430 | assert(r == -ENOENT); | |
431 | } | |
432 | } | |
433 | ||
434 | complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]); | |
435 | ||
436 | set_free(other->meta.dependencies[d]); | |
437 | other->meta.dependencies[d] = NULL; | |
438 | } | |
439 | ||
440 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
441 | UnitDependency d; |
442 | ||
443 | assert(u); | |
444 | assert(other); | |
445 | assert(u->meta.manager == other->meta.manager); | |
9e2f7c11 | 446 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 | 447 | |
cc916967 LP |
448 | other = unit_follow_merge(other); |
449 | ||
23a177ef LP |
450 | if (other == u) |
451 | return 0; | |
452 | ||
9e2f7c11 LP |
453 | if (u->meta.type != other->meta.type) |
454 | return -EINVAL; | |
455 | ||
456 | if (!streq_ptr(u->meta.instance, other->meta.instance)) | |
87f0e418 LP |
457 | return -EINVAL; |
458 | ||
cc916967 LP |
459 | if (other->meta.load_state != UNIT_STUB && |
460 | other->meta.load_state != UNIT_FAILED) | |
23a177ef | 461 | return -EEXIST; |
87f0e418 | 462 | |
819e213f LP |
463 | if (other->meta.job) |
464 | return -EEXIST; | |
465 | ||
466 | if (unit_active_state(other) != UNIT_INACTIVE) | |
467 | return -EEXIST; | |
468 | ||
87f0e418 | 469 | /* Merge names */ |
23a177ef | 470 | merge_names(u, other); |
87f0e418 LP |
471 | |
472 | /* Merge dependencies */ | |
473 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 474 | merge_dependencies(u, other, d); |
87f0e418 | 475 | |
23a177ef LP |
476 | other->meta.load_state = UNIT_MERGED; |
477 | other->meta.merged_into = u; | |
478 | ||
3616a49c LP |
479 | /* If there is still some data attached to the other node, we |
480 | * don't need it anymore, and can free it. */ | |
481 | if (other->meta.load_state != UNIT_STUB) | |
482 | if (UNIT_VTABLE(other)->done) | |
483 | UNIT_VTABLE(other)->done(other); | |
484 | ||
485 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
486 | unit_add_to_cleanup_queue(other); |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
491 | int unit_merge_by_name(Unit *u, const char *name) { | |
492 | Unit *other; | |
9e2f7c11 LP |
493 | int r; |
494 | char *s = NULL; | |
23a177ef LP |
495 | |
496 | assert(u); | |
497 | assert(name); | |
498 | ||
9e2f7c11 LP |
499 | if (unit_name_is_template(name)) { |
500 | if (!u->meta.instance) | |
501 | return -EINVAL; | |
502 | ||
503 | if (!(s = unit_name_replace_instance(name, u->meta.instance))) | |
504 | return -ENOMEM; | |
505 | ||
506 | name = s; | |
507 | } | |
508 | ||
23a177ef | 509 | if (!(other = manager_get_unit(u->meta.manager, name))) |
9e2f7c11 LP |
510 | r = unit_add_name(u, name); |
511 | else | |
512 | r = unit_merge(u, other); | |
23a177ef | 513 | |
9e2f7c11 LP |
514 | free(s); |
515 | return r; | |
23a177ef LP |
516 | } |
517 | ||
518 | Unit* unit_follow_merge(Unit *u) { | |
519 | assert(u); | |
520 | ||
521 | while (u->meta.load_state == UNIT_MERGED) | |
522 | assert_se(u = u->meta.merged_into); | |
523 | ||
524 | return u; | |
525 | } | |
526 | ||
527 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
528 | int r; | |
529 | ||
530 | assert(u); | |
531 | assert(c); | |
532 | ||
ecc6e2b8 LP |
533 | if (c->std_output != EXEC_OUTPUT_KMSG && |
534 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
535 | c->std_error != EXEC_OUTPUT_KMSG && | |
536 | c->std_error != EXEC_OUTPUT_SYSLOG) | |
23a177ef LP |
537 | return 0; |
538 | ||
539 | /* If syslog or kernel logging is requested, make sure our own | |
540 | * logging daemon is run first. */ | |
541 | ||
701cc384 | 542 | if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
543 | return r; |
544 | ||
545 | if (u->meta.manager->running_as != MANAGER_SESSION) | |
701cc384 | 546 | if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
547 | return r; |
548 | ||
87f0e418 LP |
549 | return 0; |
550 | } | |
551 | ||
87f0e418 LP |
552 | const char *unit_description(Unit *u) { |
553 | assert(u); | |
554 | ||
555 | if (u->meta.description) | |
556 | return u->meta.description; | |
557 | ||
9e2f7c11 | 558 | return u->meta.id; |
87f0e418 LP |
559 | } |
560 | ||
561 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
87f0e418 LP |
562 | char *t; |
563 | UnitDependency d; | |
564 | Iterator i; | |
47be870b LP |
565 | char *p2; |
566 | const char *prefix2; | |
8e274523 | 567 | CGroupBonding *b; |
173e3821 LP |
568 | char |
569 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
570 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
571 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
572 | timestamp4[FORMAT_TIMESTAMP_MAX]; | |
87f0e418 LP |
573 | |
574 | assert(u); | |
9e2f7c11 | 575 | assert(u->meta.type >= 0); |
87f0e418 LP |
576 | |
577 | if (!prefix) | |
578 | prefix = ""; | |
47be870b LP |
579 | p2 = strappend(prefix, "\t"); |
580 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
581 | |
582 | fprintf(f, | |
40d50879 | 583 | "%s-> Unit %s:\n" |
87f0e418 | 584 | "%s\tDescription: %s\n" |
9e2f7c11 | 585 | "%s\tInstance: %s\n" |
87f0e418 | 586 | "%s\tUnit Load State: %s\n" |
2fad8195 | 587 | "%s\tUnit Active State: %s\n" |
173e3821 | 588 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 589 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 590 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 591 | "%s\tInactive Enter Timestamp: %s\n" |
bc0f8771 LP |
592 | "%s\tGC Check Good: %s\n" |
593 | "%s\tOnly By Dependency: %s\n", | |
9e2f7c11 | 594 | prefix, u->meta.id, |
87f0e418 | 595 | prefix, unit_description(u), |
9e2f7c11 | 596 | prefix, strna(u->meta.instance), |
94f04347 | 597 | prefix, unit_load_state_to_string(u->meta.load_state), |
2fad8195 | 598 | prefix, unit_active_state_to_string(unit_active_state(u)), |
871d7de4 LP |
599 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)), |
600 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)), | |
601 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)), | |
602 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)), | |
bc0f8771 LP |
603 | prefix, yes_no(unit_check_gc(u)), |
604 | prefix, yes_no(u->meta.only_by_dependency)); | |
0301abf4 | 605 | |
87f0e418 LP |
606 | SET_FOREACH(t, u->meta.names, i) |
607 | fprintf(f, "%s\tName: %s\n", prefix, t); | |
608 | ||
23a177ef LP |
609 | if (u->meta.fragment_path) |
610 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path); | |
611 | ||
87f0e418 LP |
612 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
613 | Unit *other; | |
614 | ||
87f0e418 | 615 | SET_FOREACH(other, u->meta.dependencies[d], i) |
9e2f7c11 | 616 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id); |
87f0e418 LP |
617 | } |
618 | ||
23a177ef | 619 | if (u->meta.load_state == UNIT_LOADED) { |
b0650475 LP |
620 | fprintf(f, |
621 | "%s\tRecursive Stop: %s\n" | |
622 | "%s\tStop When Unneeded: %s\n", | |
623 | prefix, yes_no(u->meta.recursive_stop), | |
624 | prefix, yes_no(u->meta.stop_when_unneeded)); | |
625 | ||
23a177ef LP |
626 | LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) |
627 | fprintf(f, "%s\tControlGroup: %s:%s\n", | |
628 | prefix, b->controller, b->path); | |
8e274523 | 629 | |
23a177ef LP |
630 | if (UNIT_VTABLE(u)->dump) |
631 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 LP |
632 | |
633 | } else if (u->meta.load_state == UNIT_MERGED) | |
634 | fprintf(f, | |
635 | "%s\tMerged into: %s\n", | |
9e2f7c11 | 636 | prefix, u->meta.merged_into->meta.id); |
87f0e418 LP |
637 | |
638 | if (u->meta.job) | |
639 | job_dump(u->meta.job, f, prefix2); | |
640 | ||
47be870b | 641 | free(p2); |
87f0e418 LP |
642 | } |
643 | ||
644 | /* Common implementation for multiple backends */ | |
e537352b | 645 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
646 | int r; |
647 | ||
648 | assert(u); | |
23a177ef LP |
649 | |
650 | /* Load a .service file */ | |
e537352b | 651 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
652 | return r; |
653 | ||
e537352b | 654 | if (u->meta.load_state == UNIT_STUB) |
23a177ef LP |
655 | return -ENOENT; |
656 | ||
657 | /* Load drop-in directory data */ | |
658 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
659 | return r; | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | /* Common implementation for multiple backends */ | |
e537352b | 665 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 666 | int r; |
87f0e418 LP |
667 | |
668 | assert(u); | |
669 | ||
23a177ef LP |
670 | /* Same as unit_load_fragment_and_dropin(), but whether |
671 | * something can be loaded or not doesn't matter. */ | |
672 | ||
673 | /* Load a .service file */ | |
e537352b | 674 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
675 | return r; |
676 | ||
e537352b LP |
677 | if (u->meta.load_state == UNIT_STUB) |
678 | u->meta.load_state = UNIT_LOADED; | |
d46de8a1 | 679 | |
87f0e418 | 680 | /* Load drop-in directory data */ |
23a177ef | 681 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
682 | return r; |
683 | ||
23a177ef | 684 | return 0; |
87f0e418 LP |
685 | } |
686 | ||
a16e1123 LP |
687 | /* Common implementation for multiple backends */ |
688 | int unit_load_nop(Unit *u) { | |
689 | assert(u); | |
690 | ||
691 | if (u->meta.load_state == UNIT_STUB) | |
692 | u->meta.load_state = UNIT_LOADED; | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
87f0e418 LP |
697 | int unit_load(Unit *u) { |
698 | int r; | |
699 | ||
700 | assert(u); | |
701 | ||
702 | if (u->meta.in_load_queue) { | |
703 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
704 | u->meta.in_load_queue = false; | |
705 | } | |
706 | ||
e537352b LP |
707 | if (u->meta.type == _UNIT_TYPE_INVALID) |
708 | return -EINVAL; | |
709 | ||
87f0e418 LP |
710 | if (u->meta.load_state != UNIT_STUB) |
711 | return 0; | |
712 | ||
e537352b LP |
713 | if (UNIT_VTABLE(u)->load) |
714 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 715 | goto fail; |
23a177ef | 716 | |
e537352b | 717 | if (u->meta.load_state == UNIT_STUB) { |
23a177ef LP |
718 | r = -ENOENT; |
719 | goto fail; | |
720 | } | |
721 | ||
23a177ef LP |
722 | assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into); |
723 | ||
724 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 725 | unit_add_to_gc_queue(u); |
87f0e418 | 726 | |
87f0e418 LP |
727 | return 0; |
728 | ||
729 | fail: | |
730 | u->meta.load_state = UNIT_FAILED; | |
c1e1601e | 731 | unit_add_to_dbus_queue(u); |
23a177ef | 732 | |
30de7d85 | 733 | log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); |
23a177ef | 734 | |
87f0e418 LP |
735 | return r; |
736 | } | |
737 | ||
738 | /* Errors: | |
d5159713 LP |
739 | * -EBADR: This unit type does not support starting. |
740 | * -EALREADY: Unit is already started. | |
741 | * -EAGAIN: An operation is already in progress. Retry later. | |
742 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
743 | */ |
744 | int unit_start(Unit *u) { | |
745 | UnitActiveState state; | |
746 | ||
747 | assert(u); | |
748 | ||
7898b0cf LP |
749 | /* If this is already (being) started, then this will |
750 | * succeed. Note that this will even succeed if this unit is | |
751 | * not startable by the user. This is relied on to detect when | |
752 | * we need to wait for units and when waiting is finished. */ | |
87f0e418 LP |
753 | state = unit_active_state(u); |
754 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
755 | return -EALREADY; | |
756 | ||
7898b0cf LP |
757 | /* If it is stopped, but we cannot start it, then fail */ |
758 | if (!UNIT_VTABLE(u)->start) | |
759 | return -EBADR; | |
760 | ||
87f0e418 LP |
761 | /* We don't suppress calls to ->start() here when we are |
762 | * already starting, to allow this request to be used as a | |
763 | * "hurry up" call, for example when the unit is in some "auto | |
764 | * restart" state where it waits for a holdoff timer to elapse | |
765 | * before it will start again. */ | |
766 | ||
c1e1601e | 767 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
768 | return UNIT_VTABLE(u)->start(u); |
769 | } | |
770 | ||
771 | bool unit_can_start(Unit *u) { | |
772 | assert(u); | |
773 | ||
774 | return !!UNIT_VTABLE(u)->start; | |
775 | } | |
776 | ||
777 | /* Errors: | |
778 | * -EBADR: This unit type does not support stopping. | |
779 | * -EALREADY: Unit is already stopped. | |
780 | * -EAGAIN: An operation is already in progress. Retry later. | |
781 | */ | |
782 | int unit_stop(Unit *u) { | |
783 | UnitActiveState state; | |
784 | ||
785 | assert(u); | |
786 | ||
87f0e418 LP |
787 | state = unit_active_state(u); |
788 | if (state == UNIT_INACTIVE) | |
789 | return -EALREADY; | |
790 | ||
7898b0cf LP |
791 | if (!UNIT_VTABLE(u)->stop) |
792 | return -EBADR; | |
793 | ||
c1e1601e | 794 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
795 | return UNIT_VTABLE(u)->stop(u); |
796 | } | |
797 | ||
798 | /* Errors: | |
799 | * -EBADR: This unit type does not support reloading. | |
800 | * -ENOEXEC: Unit is not started. | |
801 | * -EAGAIN: An operation is already in progress. Retry later. | |
802 | */ | |
803 | int unit_reload(Unit *u) { | |
804 | UnitActiveState state; | |
805 | ||
806 | assert(u); | |
807 | ||
808 | if (!unit_can_reload(u)) | |
809 | return -EBADR; | |
810 | ||
811 | state = unit_active_state(u); | |
812 | if (unit_active_state(u) == UNIT_ACTIVE_RELOADING) | |
813 | return -EALREADY; | |
814 | ||
815 | if (unit_active_state(u) != UNIT_ACTIVE) | |
816 | return -ENOEXEC; | |
817 | ||
c1e1601e | 818 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
819 | return UNIT_VTABLE(u)->reload(u); |
820 | } | |
821 | ||
822 | bool unit_can_reload(Unit *u) { | |
823 | assert(u); | |
824 | ||
825 | if (!UNIT_VTABLE(u)->reload) | |
826 | return false; | |
827 | ||
828 | if (!UNIT_VTABLE(u)->can_reload) | |
829 | return true; | |
830 | ||
831 | return UNIT_VTABLE(u)->can_reload(u); | |
832 | } | |
833 | ||
f3bff0eb LP |
834 | static void unit_check_uneeded(Unit *u) { |
835 | Iterator i; | |
836 | Unit *other; | |
837 | ||
838 | assert(u); | |
839 | ||
840 | /* If this service shall be shut down when unneeded then do | |
841 | * so. */ | |
842 | ||
843 | if (!u->meta.stop_when_unneeded) | |
844 | return; | |
845 | ||
846 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
847 | return; | |
848 | ||
849 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
850 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
851 | return; | |
852 | ||
9e2f7c11 | 853 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f3bff0eb LP |
854 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
855 | return; | |
856 | ||
857 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i) | |
858 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
859 | return; | |
860 | ||
9e2f7c11 | 861 | log_debug("Service %s is not needed anymore. Stopping.", u->meta.id); |
f3bff0eb LP |
862 | |
863 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
864 | manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL); | |
865 | } | |
866 | ||
87f0e418 LP |
867 | static void retroactively_start_dependencies(Unit *u) { |
868 | Iterator i; | |
869 | Unit *other; | |
870 | ||
871 | assert(u); | |
872 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
873 | ||
874 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
875 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
876 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); | |
877 | ||
9e2f7c11 | 878 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
87f0e418 LP |
879 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
880 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); | |
881 | ||
882 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
883 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
884 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); | |
885 | ||
886 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
887 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
888 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); | |
889 | ||
890 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) | |
891 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
892 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); | |
893 | } | |
894 | ||
895 | static void retroactively_stop_dependencies(Unit *u) { | |
896 | Iterator i; | |
897 | Unit *other; | |
898 | ||
899 | assert(u); | |
900 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
901 | ||
f3bff0eb LP |
902 | if (u->meta.recursive_stop) { |
903 | /* Pull down units need us recursively if enabled */ | |
904 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
905 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
906 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); | |
907 | } | |
908 | ||
909 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
910 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
87f0e418 | 911 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
f3bff0eb | 912 | unit_check_uneeded(other); |
9e2f7c11 | 913 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb LP |
914 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
915 | unit_check_uneeded(other); | |
916 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
917 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
918 | unit_check_uneeded(other); | |
919 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
920 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
921 | unit_check_uneeded(other); | |
9e2f7c11 | 922 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb LP |
923 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
924 | unit_check_uneeded(other); | |
87f0e418 LP |
925 | } |
926 | ||
927 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { | |
a096ed36 | 928 | bool unexpected = false; |
871d7de4 | 929 | timestamp ts; |
a096ed36 | 930 | |
87f0e418 LP |
931 | assert(u); |
932 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
933 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 934 | |
8e471ccd LP |
935 | /* Note that this is called for all low-level state changes, |
936 | * even if they might map to the same high-level | |
937 | * UnitActiveState! That means that ns == os is OK an expected | |
938 | * behaviour here. For example: if a mount point is remounted | |
939 | * this function will be called too and the utmp code below | |
940 | * relies on that! */ | |
87f0e418 | 941 | |
871d7de4 | 942 | timestamp_get(&ts); |
173e3821 LP |
943 | |
944 | if (os == UNIT_INACTIVE && ns != UNIT_INACTIVE) | |
945 | u->meta.inactive_exit_timestamp = ts; | |
946 | else if (os != UNIT_INACTIVE && ns == UNIT_INACTIVE) | |
947 | u->meta.inactive_enter_timestamp = ts; | |
948 | ||
87f0e418 | 949 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 950 | u->meta.active_enter_timestamp = ts; |
87f0e418 | 951 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 952 | u->meta.active_exit_timestamp = ts; |
87f0e418 | 953 | |
871d7de4 | 954 | timer_unit_notify(u, ns); |
01f78473 | 955 | path_unit_notify(u, ns); |
871d7de4 | 956 | |
87f0e418 LP |
957 | if (u->meta.job) { |
958 | ||
959 | if (u->meta.job->state == JOB_WAITING) | |
960 | ||
961 | /* So we reached a different state for this | |
962 | * job. Let's see if we can run it now if it | |
963 | * failed previously due to EAGAIN. */ | |
c1e1601e | 964 | job_add_to_run_queue(u->meta.job); |
87f0e418 | 965 | |
87f0e418 | 966 | |
b410e6b9 LP |
967 | /* Let's check whether this state change constitutes a |
968 | * finished job, or maybe cotradicts a running job and | |
969 | * hence needs to invalidate jobs. */ | |
87f0e418 | 970 | |
b410e6b9 | 971 | switch (u->meta.job->type) { |
87f0e418 | 972 | |
b410e6b9 LP |
973 | case JOB_START: |
974 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 975 | |
b410e6b9 LP |
976 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
977 | job_finish_and_invalidate(u->meta.job, true); | |
978 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
979 | unexpected = true; | |
980 | job_finish_and_invalidate(u->meta.job, false); | |
981 | } | |
87f0e418 | 982 | |
b410e6b9 | 983 | break; |
87f0e418 | 984 | |
b410e6b9 LP |
985 | case JOB_RELOAD: |
986 | case JOB_RELOAD_OR_START: | |
87f0e418 | 987 | |
b410e6b9 | 988 | if (u->meta.job->state == JOB_RUNNING) { |
a096ed36 | 989 | if (ns == UNIT_ACTIVE) |
87f0e418 | 990 | job_finish_and_invalidate(u->meta.job, true); |
a096ed36 LP |
991 | else if (ns != UNIT_ACTIVATING && ns != UNIT_ACTIVE_RELOADING) { |
992 | unexpected = true; | |
87f0e418 | 993 | job_finish_and_invalidate(u->meta.job, false); |
a096ed36 | 994 | } |
b410e6b9 | 995 | } |
87f0e418 | 996 | |
b410e6b9 | 997 | break; |
87f0e418 | 998 | |
b410e6b9 LP |
999 | case JOB_STOP: |
1000 | case JOB_RESTART: | |
1001 | case JOB_TRY_RESTART: | |
87f0e418 | 1002 | |
b410e6b9 LP |
1003 | if (ns == UNIT_INACTIVE) |
1004 | job_finish_and_invalidate(u->meta.job, true); | |
1005 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
1006 | unexpected = true; | |
1007 | job_finish_and_invalidate(u->meta.job, false); | |
1008 | } | |
87f0e418 | 1009 | |
b410e6b9 | 1010 | break; |
87f0e418 | 1011 | |
b410e6b9 LP |
1012 | default: |
1013 | assert_not_reached("Job type unknown"); | |
87f0e418 LP |
1014 | } |
1015 | } | |
1016 | ||
1017 | /* If this state change happened without being requested by a | |
1018 | * job, then let's retroactively start or stop dependencies */ | |
1019 | ||
a096ed36 LP |
1020 | if (unexpected) { |
1021 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1022 | retroactively_start_dependencies(u); | |
1023 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1024 | retroactively_stop_dependencies(u); | |
1025 | } | |
f3bff0eb | 1026 | |
e537352b LP |
1027 | /* Some names are special */ |
1028 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d | 1029 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) { |
e537352b LP |
1030 | /* The bus just might have become available, |
1031 | * hence try to connect to it, if we aren't | |
1032 | * yet connected. */ | |
f278026d LP |
1033 | bus_init_system(u->meta.manager); |
1034 | bus_init_api(u->meta.manager); | |
1035 | } | |
1036 | ||
e537352b LP |
1037 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) |
1038 | /* The syslog daemon just might have become | |
1039 | * available, hence try to connect to it, if | |
1040 | * we aren't yet connected. */ | |
843d2643 | 1041 | log_open(); |
f278026d | 1042 | |
e537352b LP |
1043 | if (u->meta.type == UNIT_MOUNT) |
1044 | /* Another directory became available, let's | |
1045 | * check if that is enough to write our utmp | |
1046 | * entry. */ | |
1047 | manager_write_utmp_reboot(u->meta.manager); | |
1048 | ||
1049 | if (u->meta.type == UNIT_TARGET) | |
1050 | /* A target got activated, maybe this is a runlevel? */ | |
1051 | manager_write_utmp_runlevel(u->meta.manager, u); | |
1052 | ||
1053 | } else if (!UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d LP |
1054 | |
1055 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) | |
e537352b LP |
1056 | /* The syslog daemon might just have |
1057 | * terminated, hence try to disconnect from | |
1058 | * it. */ | |
2882c7ed | 1059 | log_close_syslog(); |
f278026d LP |
1060 | |
1061 | /* We don't care about D-Bus here, since we'll get an | |
1062 | * asynchronous notification for it anyway. */ | |
1063 | } | |
1064 | ||
f3bff0eb LP |
1065 | /* Maybe we finished startup and are now ready for being |
1066 | * stopped because unneeded? */ | |
1067 | unit_check_uneeded(u); | |
c1e1601e LP |
1068 | |
1069 | unit_add_to_dbus_queue(u); | |
701cc384 | 1070 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1071 | } |
1072 | ||
acbb0225 | 1073 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1074 | struct epoll_event ev; |
1075 | ||
1076 | assert(u); | |
1077 | assert(fd >= 0); | |
acbb0225 | 1078 | assert(w); |
ea430986 | 1079 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1080 | |
1081 | zero(ev); | |
acbb0225 | 1082 | ev.data.ptr = w; |
87f0e418 LP |
1083 | ev.events = events; |
1084 | ||
acbb0225 LP |
1085 | if (epoll_ctl(u->meta.manager->epoll_fd, |
1086 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, | |
1087 | fd, | |
1088 | &ev) < 0) | |
1089 | return -errno; | |
87f0e418 | 1090 | |
acbb0225 LP |
1091 | w->fd = fd; |
1092 | w->type = WATCH_FD; | |
ea430986 | 1093 | w->data.unit = u; |
87f0e418 | 1094 | |
acbb0225 | 1095 | return 0; |
87f0e418 LP |
1096 | } |
1097 | ||
acbb0225 | 1098 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1099 | assert(u); |
acbb0225 | 1100 | assert(w); |
87f0e418 | 1101 | |
acbb0225 LP |
1102 | if (w->type == WATCH_INVALID) |
1103 | return; | |
1104 | ||
ea430986 LP |
1105 | assert(w->type == WATCH_FD); |
1106 | assert(w->data.unit == u); | |
acbb0225 LP |
1107 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
1108 | ||
1109 | w->fd = -1; | |
1110 | w->type = WATCH_INVALID; | |
ea430986 | 1111 | w->data.unit = NULL; |
87f0e418 LP |
1112 | } |
1113 | ||
1114 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1115 | assert(u); | |
1116 | assert(pid >= 1); | |
1117 | ||
05e343b7 LP |
1118 | /* Watch a specific PID. We only support one unit watching |
1119 | * each PID for now. */ | |
1120 | ||
87f0e418 LP |
1121 | return hashmap_put(u->meta.manager->watch_pids, UINT32_TO_PTR(pid), u); |
1122 | } | |
1123 | ||
1124 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1125 | assert(u); | |
1126 | assert(pid >= 1); | |
1127 | ||
05e343b7 | 1128 | hashmap_remove_value(u->meta.manager->watch_pids, UINT32_TO_PTR(pid), u); |
87f0e418 LP |
1129 | } |
1130 | ||
acbb0225 | 1131 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1132 | struct itimerspec its; |
acbb0225 | 1133 | int flags, fd; |
87f0e418 LP |
1134 | bool ours; |
1135 | ||
1136 | assert(u); | |
acbb0225 | 1137 | assert(w); |
ea430986 | 1138 | assert(w->type == WATCH_INVALID || (w->type == WATCH_TIMER && w->data.unit == u)); |
87f0e418 LP |
1139 | |
1140 | /* This will try to reuse the old timer if there is one */ | |
1141 | ||
acbb0225 | 1142 | if (w->type == WATCH_TIMER) { |
87f0e418 | 1143 | ours = false; |
acbb0225 | 1144 | fd = w->fd; |
87f0e418 LP |
1145 | } else { |
1146 | ours = true; | |
87f0e418 LP |
1147 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1148 | return -errno; | |
1149 | } | |
1150 | ||
1151 | zero(its); | |
1152 | ||
1153 | if (delay <= 0) { | |
1154 | /* Set absolute time in the past, but not 0, since we | |
1155 | * don't want to disarm the timer */ | |
1156 | its.it_value.tv_sec = 0; | |
1157 | its.it_value.tv_nsec = 1; | |
1158 | ||
1159 | flags = TFD_TIMER_ABSTIME; | |
1160 | } else { | |
1161 | timespec_store(&its.it_value, delay); | |
1162 | flags = 0; | |
1163 | } | |
1164 | ||
1165 | /* This will also flush the elapse counter */ | |
1166 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1167 | goto fail; | |
1168 | ||
acbb0225 LP |
1169 | if (w->type == WATCH_INVALID) { |
1170 | struct epoll_event ev; | |
87f0e418 | 1171 | |
acbb0225 LP |
1172 | zero(ev); |
1173 | ev.data.ptr = w; | |
f94ea366 | 1174 | ev.events = EPOLLIN; |
acbb0225 LP |
1175 | |
1176 | if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) | |
1177 | goto fail; | |
1178 | } | |
1179 | ||
1180 | w->fd = fd; | |
1181 | w->type = WATCH_TIMER; | |
ea430986 | 1182 | w->data.unit = u; |
87f0e418 | 1183 | |
87f0e418 LP |
1184 | return 0; |
1185 | ||
1186 | fail: | |
1187 | if (ours) | |
ea430986 | 1188 | close_nointr_nofail(fd); |
87f0e418 LP |
1189 | |
1190 | return -errno; | |
1191 | } | |
1192 | ||
acbb0225 | 1193 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1194 | assert(u); |
acbb0225 | 1195 | assert(w); |
87f0e418 | 1196 | |
acbb0225 | 1197 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1198 | return; |
1199 | ||
ea430986 | 1200 | assert(w->type == WATCH_TIMER && w->data.unit == u); |
acbb0225 LP |
1201 | |
1202 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
a16e1123 | 1203 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1204 | |
1205 | w->fd = -1; | |
1206 | w->type = WATCH_INVALID; | |
ea430986 | 1207 | w->data.unit = NULL; |
87f0e418 LP |
1208 | } |
1209 | ||
1210 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1211 | assert(u); | |
1212 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1213 | ||
1214 | switch (j) { | |
1215 | ||
1216 | case JOB_VERIFY_ACTIVE: | |
1217 | case JOB_START: | |
1218 | return true; | |
1219 | ||
1220 | case JOB_STOP: | |
1221 | case JOB_RESTART: | |
1222 | case JOB_TRY_RESTART: | |
1223 | return unit_can_start(u); | |
1224 | ||
1225 | case JOB_RELOAD: | |
1226 | return unit_can_reload(u); | |
1227 | ||
1228 | case JOB_RELOAD_OR_START: | |
1229 | return unit_can_reload(u) && unit_can_start(u); | |
1230 | ||
1231 | default: | |
1232 | assert_not_reached("Invalid job type"); | |
1233 | } | |
1234 | } | |
1235 | ||
701cc384 | 1236 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1237 | |
1238 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1239 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1240 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1241 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1242 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1243 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 | 1244 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1245 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 LP |
1246 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
1247 | [UNIT_CONFLICTS] = UNIT_CONFLICTS, | |
1248 | [UNIT_BEFORE] = UNIT_AFTER, | |
701cc384 LP |
1249 | [UNIT_AFTER] = UNIT_BEFORE, |
1250 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
1251 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES | |
87f0e418 | 1252 | }; |
701cc384 | 1253 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1254 | |
1255 | assert(u); | |
1256 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
1257 | assert(inverse_table[d] != _UNIT_DEPENDENCY_INVALID); | |
1258 | assert(other); | |
1259 | ||
1260 | /* We won't allow dependencies on ourselves. We will not | |
1261 | * consider them an error however. */ | |
1262 | if (u == other) | |
1263 | return 0; | |
1264 | ||
9e2f7c11 LP |
1265 | if (UNIT_VTABLE(u)->no_requires && |
1266 | (d == UNIT_REQUIRES || | |
1267 | d == UNIT_REQUIRES_OVERRIDABLE || | |
1268 | d == UNIT_REQUISITE || | |
1269 | d == UNIT_REQUISITE_OVERRIDABLE)) { | |
1270 | return -EINVAL; | |
1271 | } | |
1272 | ||
701cc384 LP |
1273 | if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0 || |
1274 | (r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) | |
87f0e418 LP |
1275 | return r; |
1276 | ||
701cc384 LP |
1277 | if (add_reference) |
1278 | if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || | |
1279 | (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
1280 | return r; | |
87f0e418 | 1281 | |
701cc384 LP |
1282 | if ((q = set_put(u->meta.dependencies[d], other)) < 0) |
1283 | return q; | |
87f0e418 | 1284 | |
701cc384 LP |
1285 | if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) { |
1286 | r = v; | |
1287 | goto fail; | |
1288 | } | |
1289 | ||
1290 | if (add_reference) { | |
1291 | if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) { | |
1292 | r = w; | |
1293 | goto fail; | |
1294 | } | |
1295 | ||
1296 | if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0) | |
1297 | goto fail; | |
87f0e418 LP |
1298 | } |
1299 | ||
c1e1601e | 1300 | unit_add_to_dbus_queue(u); |
87f0e418 | 1301 | return 0; |
701cc384 LP |
1302 | |
1303 | fail: | |
1304 | if (q > 0) | |
1305 | set_remove(u->meta.dependencies[d], other); | |
1306 | ||
1307 | if (v > 0) | |
1308 | set_remove(other->meta.dependencies[inverse_table[d]], u); | |
1309 | ||
1310 | if (w > 0) | |
1311 | set_remove(u->meta.dependencies[UNIT_REFERENCES], other); | |
1312 | ||
1313 | return r; | |
87f0e418 | 1314 | } |
0301abf4 | 1315 | |
9e2f7c11 LP |
1316 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1317 | char *s; | |
1318 | ||
1319 | assert(u); | |
1320 | assert(name || path); | |
1321 | ||
1322 | if (!name) | |
1323 | name = file_name_from_path(path); | |
1324 | ||
1325 | if (!unit_name_is_template(name)) { | |
1326 | *p = NULL; | |
1327 | return name; | |
1328 | } | |
1329 | ||
1330 | if (u->meta.instance) | |
1331 | s = unit_name_replace_instance(name, u->meta.instance); | |
1332 | else { | |
1333 | char *i; | |
1334 | ||
1335 | if (!(i = unit_name_to_prefix(u->meta.id))) | |
1336 | return NULL; | |
1337 | ||
1338 | s = unit_name_replace_instance(name, i); | |
1339 | free(i); | |
1340 | } | |
1341 | ||
1342 | if (!s) | |
1343 | return NULL; | |
1344 | ||
1345 | *p = s; | |
1346 | return s; | |
1347 | } | |
1348 | ||
701cc384 | 1349 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1350 | Unit *other; |
1351 | int r; | |
9e2f7c11 | 1352 | char *s; |
09b6b09f | 1353 | |
9e2f7c11 LP |
1354 | assert(u); |
1355 | assert(name || path); | |
09b6b09f | 1356 | |
9e2f7c11 LP |
1357 | if (!(name = resolve_template(u, name, path, &s))) |
1358 | return -ENOMEM; | |
09b6b09f | 1359 | |
9e2f7c11 LP |
1360 | if ((r = manager_load_unit(u->meta.manager, name, path, &other)) < 0) |
1361 | goto finish; | |
1362 | ||
701cc384 | 1363 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1364 | |
1365 | finish: | |
1366 | free(s); | |
1367 | return r; | |
09b6b09f LP |
1368 | } |
1369 | ||
701cc384 | 1370 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1371 | Unit *other; |
1372 | int r; | |
9e2f7c11 | 1373 | char *s; |
bd77d0fc | 1374 | |
9e2f7c11 LP |
1375 | assert(u); |
1376 | assert(name || path); | |
bd77d0fc | 1377 | |
9e2f7c11 LP |
1378 | if (!(name = resolve_template(u, name, path, &s))) |
1379 | return -ENOMEM; | |
bd77d0fc | 1380 | |
9e2f7c11 LP |
1381 | if ((r = manager_load_unit(u->meta.manager, name, path, &other)) < 0) |
1382 | goto finish; | |
1383 | ||
701cc384 | 1384 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1385 | |
1386 | finish: | |
1387 | free(s); | |
1388 | return r; | |
bd77d0fc LP |
1389 | } |
1390 | ||
0301abf4 LP |
1391 | int set_unit_path(const char *p) { |
1392 | char *cwd, *c; | |
1393 | int r; | |
1394 | ||
1395 | /* This is mostly for debug purposes */ | |
1396 | ||
1397 | if (path_is_absolute(p)) { | |
1398 | if (!(c = strdup(p))) | |
1399 | return -ENOMEM; | |
1400 | } else { | |
1401 | if (!(cwd = get_current_dir_name())) | |
1402 | return -errno; | |
1403 | ||
1404 | r = asprintf(&c, "%s/%s", cwd, p); | |
1405 | free(cwd); | |
1406 | ||
1407 | if (r < 0) | |
1408 | return -ENOMEM; | |
1409 | } | |
1410 | ||
036643a2 | 1411 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1412 | r = -errno; |
1413 | free(c); | |
1414 | return r; | |
1415 | } | |
1416 | ||
1417 | return 0; | |
1418 | } | |
88066b3a | 1419 | |
ea430986 LP |
1420 | char *unit_dbus_path(Unit *u) { |
1421 | char *p, *e; | |
1422 | ||
1423 | assert(u); | |
1424 | ||
9e2f7c11 | 1425 | if (!(e = bus_path_escape(u->meta.id))) |
ea430986 LP |
1426 | return NULL; |
1427 | ||
1428 | if (asprintf(&p, "/org/freedesktop/systemd1/unit/%s", e) < 0) { | |
1429 | free(e); | |
1430 | return NULL; | |
1431 | } | |
1432 | ||
1433 | free(e); | |
1434 | return p; | |
1435 | } | |
1436 | ||
8e274523 LP |
1437 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
1438 | CGroupBonding *l; | |
1439 | int r; | |
1440 | ||
1441 | assert(u); | |
1442 | assert(b); | |
1443 | assert(b->path); | |
1444 | ||
1445 | /* Ensure this hasn't been added yet */ | |
1446 | assert(!b->unit); | |
1447 | ||
1448 | l = hashmap_get(u->meta.manager->cgroup_bondings, b->path); | |
1449 | LIST_PREPEND(CGroupBonding, by_path, l, b); | |
1450 | ||
1451 | if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) { | |
1452 | LIST_REMOVE(CGroupBonding, by_path, l, b); | |
1453 | return r; | |
1454 | } | |
1455 | ||
1456 | LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b); | |
1457 | b->unit = u; | |
1458 | ||
1459 | return 0; | |
1460 | } | |
1461 | ||
013b87c0 LP |
1462 | static char *default_cgroup_path(Unit *u) { |
1463 | char *p; | |
4f2d528d | 1464 | int r; |
013b87c0 LP |
1465 | |
1466 | assert(u); | |
1467 | ||
4f2d528d LP |
1468 | if (u->meta.instance) { |
1469 | char *t; | |
013b87c0 | 1470 | |
4f2d528d LP |
1471 | if (!(t = unit_name_template(u->meta.id))) |
1472 | return NULL; | |
1473 | ||
1474 | r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance); | |
1475 | free(t); | |
1476 | } else | |
1477 | r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id); | |
1478 | ||
1479 | return r < 0 ? NULL : p; | |
013b87c0 LP |
1480 | } |
1481 | ||
8e274523 LP |
1482 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
1483 | size_t n; | |
013b87c0 LP |
1484 | char *controller = NULL, *path = NULL; |
1485 | CGroupBonding *b = NULL; | |
8e274523 LP |
1486 | int r; |
1487 | ||
1488 | assert(u); | |
1489 | assert(name); | |
1490 | ||
1491 | /* Detect controller name */ | |
013b87c0 | 1492 | n = strcspn(name, ":"); |
8e274523 | 1493 | |
013b87c0 LP |
1494 | if (name[n] == 0 || |
1495 | (name[n] == ':' && name[n+1] == 0)) { | |
8e274523 | 1496 | |
013b87c0 | 1497 | /* Only controller name, no path? */ |
8e274523 | 1498 | |
013b87c0 LP |
1499 | if (!(path = default_cgroup_path(u))) |
1500 | return -ENOMEM; | |
8e274523 | 1501 | |
013b87c0 LP |
1502 | } else { |
1503 | const char *p; | |
8e274523 | 1504 | |
013b87c0 LP |
1505 | /* Controller name, and path. */ |
1506 | p = name+n+1; | |
8e274523 | 1507 | |
013b87c0 LP |
1508 | if (!path_is_absolute(p)) |
1509 | return -EINVAL; | |
1510 | ||
1511 | if (!(path = strdup(p))) | |
1512 | return -ENOMEM; | |
8e274523 LP |
1513 | } |
1514 | ||
013b87c0 LP |
1515 | if (n > 0) |
1516 | controller = strndup(name, n); | |
1517 | else | |
1518 | controller = strdup(u->meta.manager->cgroup_controller); | |
1519 | ||
1520 | if (!controller) { | |
1521 | r = -ENOMEM; | |
1522 | goto fail; | |
8e274523 LP |
1523 | } |
1524 | ||
013b87c0 LP |
1525 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) { |
1526 | r = -EEXIST; | |
1527 | goto fail; | |
1528 | } | |
8e274523 | 1529 | |
013b87c0 | 1530 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1531 | r = -ENOMEM; |
1532 | goto fail; | |
1533 | } | |
1534 | ||
013b87c0 LP |
1535 | b->controller = controller; |
1536 | b->path = path; | |
8e274523 LP |
1537 | b->only_us = false; |
1538 | b->clean_up = false; | |
1539 | ||
1540 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1541 | goto fail; | |
1542 | ||
1543 | return 0; | |
1544 | ||
1545 | fail: | |
013b87c0 LP |
1546 | free(path); |
1547 | free(controller); | |
8e274523 LP |
1548 | free(b); |
1549 | ||
1550 | return r; | |
1551 | } | |
1552 | ||
1553 | int unit_add_default_cgroup(Unit *u) { | |
1554 | CGroupBonding *b; | |
1555 | int r = -ENOMEM; | |
1556 | ||
1557 | assert(u); | |
1558 | ||
1559 | /* Adds in the default cgroup data, if it wasn't specified yet */ | |
1560 | ||
1561 | if (unit_get_default_cgroup(u)) | |
1562 | return 0; | |
1563 | ||
1564 | if (!(b = new0(CGroupBonding, 1))) | |
1565 | return -ENOMEM; | |
1566 | ||
1567 | if (!(b->controller = strdup(u->meta.manager->cgroup_controller))) | |
1568 | goto fail; | |
1569 | ||
013b87c0 | 1570 | if (!(b->path = default_cgroup_path(u))) |
8e274523 LP |
1571 | goto fail; |
1572 | ||
1573 | b->clean_up = true; | |
1574 | b->only_us = true; | |
1575 | ||
1576 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1577 | goto fail; | |
1578 | ||
1579 | return 0; | |
1580 | ||
1581 | fail: | |
1582 | free(b->path); | |
1583 | free(b->controller); | |
1584 | free(b); | |
1585 | ||
1586 | return r; | |
1587 | } | |
1588 | ||
1589 | CGroupBonding* unit_get_default_cgroup(Unit *u) { | |
1590 | assert(u); | |
1591 | ||
1592 | return cgroup_bonding_find_list(u->meta.cgroup_bondings, u->meta.manager->cgroup_controller); | |
1593 | } | |
1594 | ||
f6ff8c29 LP |
1595 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
1596 | char *t; | |
1597 | int r; | |
1598 | ||
1599 | assert(u); | |
1600 | assert(type); | |
1601 | assert(_found); | |
1602 | ||
9e2f7c11 | 1603 | if (!(t = unit_name_change_suffix(u->meta.id, type))) |
f6ff8c29 LP |
1604 | return -ENOMEM; |
1605 | ||
1606 | assert(!unit_has_name(u, t)); | |
1607 | ||
9e2f7c11 | 1608 | r = manager_load_unit(u->meta.manager, t, NULL, _found); |
f6ff8c29 LP |
1609 | free(t); |
1610 | ||
9e2f7c11 | 1611 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
1612 | |
1613 | return r; | |
1614 | } | |
1615 | ||
a16e1123 LP |
1616 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
1617 | Unit *found; | |
1618 | char *t; | |
1619 | ||
1620 | assert(u); | |
1621 | assert(type); | |
1622 | assert(_found); | |
1623 | ||
1624 | if (!(t = unit_name_change_suffix(u->meta.id, type))) | |
1625 | return -ENOMEM; | |
1626 | ||
1627 | assert(!unit_has_name(u, t)); | |
1628 | ||
1629 | found = manager_get_unit(u->meta.manager, t); | |
1630 | free(t); | |
1631 | ||
1632 | if (!found) | |
1633 | return -ENOENT; | |
1634 | ||
1635 | *_found = found; | |
1636 | return 0; | |
1637 | } | |
1638 | ||
9e2f7c11 LP |
1639 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
1640 | Unit *u = userdata; | |
1641 | assert(u); | |
1642 | ||
1643 | return unit_name_to_prefix_and_instance(u->meta.id); | |
1644 | } | |
1645 | ||
1646 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
1647 | Unit *u = userdata; | |
1648 | assert(u); | |
1649 | ||
1650 | return unit_name_to_prefix(u->meta.id); | |
1651 | } | |
1652 | ||
1653 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
1654 | Unit *u = userdata; | |
1655 | char *p, *r; | |
1656 | ||
1657 | assert(u); | |
1658 | ||
1659 | if (!(p = unit_name_to_prefix(u->meta.id))) | |
1660 | return NULL; | |
1661 | ||
1662 | r = unit_name_unescape(p); | |
1663 | free(p); | |
1664 | ||
1665 | return r; | |
1666 | } | |
1667 | ||
1668 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
1669 | Unit *u = userdata; | |
1670 | assert(u); | |
1671 | ||
1672 | if (u->meta.instance) | |
1673 | return unit_name_unescape(u->meta.instance); | |
1674 | ||
1675 | return strdup(""); | |
1676 | } | |
1677 | ||
1678 | char *unit_name_printf(Unit *u, const char* format) { | |
1679 | ||
1680 | /* | |
1681 | * This will use the passed string as format string and | |
1682 | * replace the following specifiers: | |
1683 | * | |
1684 | * %n: the full id of the unit (foo@bar.waldo) | |
1685 | * %N: the id of the unit without the suffix (foo@bar) | |
1686 | * %p: the prefix (foo) | |
1687 | * %i: the instance (bar) | |
1688 | */ | |
1689 | ||
1690 | const Specifier table[] = { | |
1691 | { 'n', specifier_string, u->meta.id }, | |
1692 | { 'N', specifier_prefix_and_instance, NULL }, | |
1693 | { 'p', specifier_prefix, NULL }, | |
1694 | { 'i', specifier_string, u->meta.instance }, | |
1695 | { 0, NULL, NULL } | |
1696 | }; | |
1697 | ||
1698 | assert(u); | |
1699 | assert(format); | |
1700 | ||
1701 | return specifier_printf(format, table, u); | |
1702 | } | |
1703 | ||
1704 | char *unit_full_printf(Unit *u, const char *format) { | |
1705 | ||
1706 | /* This is similar to unit_name_printf() but also supports | |
1707 | * unescaping */ | |
1708 | ||
1709 | const Specifier table[] = { | |
1710 | { 'n', specifier_string, u->meta.id }, | |
1711 | { 'N', specifier_prefix_and_instance, NULL }, | |
1712 | { 'p', specifier_prefix, NULL }, | |
1713 | { 'P', specifier_prefix_unescaped, NULL }, | |
1714 | { 'i', specifier_string, u->meta.instance }, | |
1715 | { 'I', specifier_instance_unescaped, NULL }, | |
1716 | { 0, NULL, NULL } | |
1717 | }; | |
1718 | ||
1719 | assert(u); | |
1720 | assert(format); | |
1721 | ||
1722 | return specifier_printf(format, table, u); | |
1723 | } | |
1724 | ||
1725 | char **unit_full_printf_strv(Unit *u, char **l) { | |
1726 | size_t n; | |
1727 | char **r, **i, **j; | |
1728 | ||
1729 | /* Applies unit_full_printf to every entry in l */ | |
1730 | ||
1731 | assert(u); | |
1732 | ||
1733 | n = strv_length(l); | |
1734 | if (!(r = new(char*, n+1))) | |
1735 | return NULL; | |
1736 | ||
1737 | for (i = l, j = r; *i; i++, j++) | |
1738 | if (!(*j = unit_full_printf(u, *i))) | |
1739 | goto fail; | |
1740 | ||
1741 | *j = NULL; | |
1742 | return r; | |
1743 | ||
1744 | fail: | |
1745 | j--; | |
1746 | while (j >= r) | |
1747 | free(*j); | |
1748 | ||
1749 | free(r); | |
1750 | ||
1751 | return NULL; | |
1752 | } | |
1753 | ||
05e343b7 LP |
1754 | int unit_watch_bus_name(Unit *u, const char *name) { |
1755 | assert(u); | |
1756 | assert(name); | |
1757 | ||
1758 | /* Watch a specific name on the bus. We only support one unit | |
1759 | * watching each name for now. */ | |
1760 | ||
1761 | return hashmap_put(u->meta.manager->watch_bus, name, u); | |
1762 | } | |
1763 | ||
1764 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
1765 | assert(u); | |
1766 | assert(name); | |
1767 | ||
1768 | hashmap_remove_value(u->meta.manager->watch_bus, name, u); | |
1769 | } | |
1770 | ||
a16e1123 LP |
1771 | bool unit_can_serialize(Unit *u) { |
1772 | assert(u); | |
1773 | ||
1774 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
1775 | } | |
1776 | ||
1777 | int unit_serialize(Unit *u, FILE *f, FDSet *fds) { | |
1778 | int r; | |
1779 | ||
1780 | assert(u); | |
1781 | assert(f); | |
1782 | assert(fds); | |
1783 | ||
1784 | if (!unit_can_serialize(u)) | |
1785 | return 0; | |
1786 | ||
1787 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
1788 | return r; | |
1789 | ||
cca098b0 LP |
1790 | if (u->meta.job) |
1791 | unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type)); | |
1792 | ||
a16e1123 LP |
1793 | /* End marker */ |
1794 | fputc('\n', f); | |
1795 | return 0; | |
1796 | } | |
1797 | ||
1798 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
1799 | va_list ap; | |
1800 | ||
1801 | assert(u); | |
1802 | assert(f); | |
1803 | assert(key); | |
1804 | assert(format); | |
1805 | ||
1806 | fputs(key, f); | |
1807 | fputc('=', f); | |
1808 | ||
1809 | va_start(ap, format); | |
1810 | vfprintf(f, format, ap); | |
1811 | va_end(ap); | |
1812 | ||
1813 | fputc('\n', f); | |
1814 | } | |
1815 | ||
1816 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
1817 | assert(u); | |
1818 | assert(f); | |
1819 | assert(key); | |
1820 | assert(value); | |
1821 | ||
1822 | fprintf(f, "%s=%s\n", key, value); | |
1823 | } | |
1824 | ||
1825 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
1826 | int r; | |
1827 | ||
1828 | assert(u); | |
1829 | assert(f); | |
1830 | assert(fds); | |
1831 | ||
1832 | if (!unit_can_serialize(u)) | |
1833 | return 0; | |
1834 | ||
1835 | for (;;) { | |
1836 | char line[1024], *l, *v; | |
1837 | size_t k; | |
1838 | ||
1839 | if (!fgets(line, sizeof(line), f)) { | |
1840 | if (feof(f)) | |
1841 | return 0; | |
1842 | return -errno; | |
1843 | } | |
1844 | ||
1845 | l = strstrip(line); | |
1846 | ||
1847 | /* End marker */ | |
1848 | if (l[0] == 0) | |
1849 | return 0; | |
1850 | ||
1851 | k = strcspn(l, "="); | |
1852 | ||
1853 | if (l[k] == '=') { | |
1854 | l[k] = 0; | |
1855 | v = l+k+1; | |
1856 | } else | |
1857 | v = l+k; | |
1858 | ||
cca098b0 LP |
1859 | if (streq(l, "job")) { |
1860 | JobType type; | |
1861 | ||
1862 | if ((type = job_type_from_string(v)) < 0) | |
1863 | log_debug("Failed to parse job type value %s", v); | |
1864 | else | |
1865 | u->meta.deserialized_job = type; | |
1866 | ||
1867 | continue; | |
1868 | } | |
1869 | ||
a16e1123 LP |
1870 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
1871 | return r; | |
1872 | } | |
1873 | } | |
1874 | ||
6e2ef85b LP |
1875 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
1876 | Unit *device; | |
1877 | char *e; | |
1878 | int r; | |
1879 | ||
1880 | assert(u); | |
1881 | ||
1882 | if (!what) | |
1883 | return 0; | |
1884 | ||
1885 | /* Adds in links to the device node that this unit is based on */ | |
1886 | ||
8407a5d0 | 1887 | if (!is_device_path(what)) |
6e2ef85b LP |
1888 | return 0; |
1889 | ||
1890 | if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) | |
1891 | return -ENOMEM; | |
1892 | ||
1893 | r = manager_load_unit(u->meta.manager, e, NULL, &device); | |
1894 | free(e); | |
1895 | ||
1896 | if (r < 0) | |
1897 | return r; | |
1898 | ||
1899 | if ((r = unit_add_dependency(u, UNIT_AFTER, device, true)) < 0) | |
1900 | return r; | |
1901 | ||
1902 | if ((r = unit_add_dependency(u, UNIT_REQUIRES, device, true)) < 0) | |
1903 | return r; | |
1904 | ||
1905 | if (wants) | |
1906 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
1907 | return r; | |
1908 | ||
1909 | return 0; | |
1910 | } | |
a16e1123 | 1911 | |
cca098b0 LP |
1912 | int unit_coldplug(Unit *u) { |
1913 | int r; | |
1914 | ||
1915 | assert(u); | |
1916 | ||
1917 | if (UNIT_VTABLE(u)->coldplug) | |
1918 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
1919 | return r; | |
1920 | ||
1921 | if (u->meta.deserialized_job >= 0) { | |
1922 | if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL)) < 0) | |
1923 | return r; | |
1924 | ||
1925 | u->meta.deserialized_job = _JOB_TYPE_INVALID; | |
1926 | } | |
1927 | ||
1928 | return 0; | |
1929 | } | |
1930 | ||
94f04347 LP |
1931 | static const char* const unit_type_table[_UNIT_TYPE_MAX] = { |
1932 | [UNIT_SERVICE] = "service", | |
1933 | [UNIT_TIMER] = "timer", | |
1934 | [UNIT_SOCKET] = "socket", | |
1935 | [UNIT_TARGET] = "target", | |
1936 | [UNIT_DEVICE] = "device", | |
1937 | [UNIT_MOUNT] = "mount", | |
1938 | [UNIT_AUTOMOUNT] = "automount", | |
07b0b134 ML |
1939 | [UNIT_SNAPSHOT] = "snapshot", |
1940 | [UNIT_SWAP] = "swap" | |
94f04347 LP |
1941 | }; |
1942 | ||
1943 | DEFINE_STRING_TABLE_LOOKUP(unit_type, UnitType); | |
1944 | ||
1945 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { | |
1946 | [UNIT_STUB] = "stub", | |
1947 | [UNIT_LOADED] = "loaded", | |
23a177ef LP |
1948 | [UNIT_FAILED] = "failed", |
1949 | [UNIT_MERGED] = "merged" | |
94f04347 LP |
1950 | }; |
1951 | ||
1952 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
1953 | ||
1954 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
1955 | [UNIT_ACTIVE] = "active", | |
1956 | [UNIT_INACTIVE] = "inactive", | |
1957 | [UNIT_ACTIVATING] = "activating", | |
1958 | [UNIT_DEACTIVATING] = "deactivating" | |
1959 | }; | |
1960 | ||
1961 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
1962 | ||
1963 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
1964 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 1965 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 LP |
1966 | [UNIT_WANTS] = "Wants", |
1967 | [UNIT_REQUISITE] = "Requisite", | |
9e2f7c11 | 1968 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
94f04347 | 1969 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 1970 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 LP |
1971 | [UNIT_WANTED_BY] = "WantedBy", |
1972 | [UNIT_CONFLICTS] = "Conflicts", | |
1973 | [UNIT_BEFORE] = "Before", | |
1974 | [UNIT_AFTER] = "After", | |
701cc384 LP |
1975 | [UNIT_REFERENCES] = "References", |
1976 | [UNIT_REFERENCED_BY] = "ReferencedBy" | |
94f04347 LP |
1977 | }; |
1978 | ||
1979 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); | |
50159e6a LP |
1980 | |
1981 | static const char* const kill_mode_table[_KILL_MODE_MAX] = { | |
80876c20 | 1982 | [KILL_CONTROL_GROUP] = "control-group", |
50159e6a | 1983 | [KILL_PROCESS_GROUP] = "process-group", |
80876c20 LP |
1984 | [KILL_PROCESS] = "process", |
1985 | [KILL_NONE] = "none" | |
50159e6a LP |
1986 | }; |
1987 | ||
1988 | DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode); |