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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
87f0e418 | 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> | |
45fb0699 | 30 | #include <sys/stat.h> |
87f0e418 LP |
31 | |
32 | #include "set.h" | |
33 | #include "unit.h" | |
34 | #include "macro.h" | |
35 | #include "strv.h" | |
36 | #include "load-fragment.h" | |
37 | #include "load-dropin.h" | |
38 | #include "log.h" | |
9e2f7c11 LP |
39 | #include "unit-name.h" |
40 | #include "specifier.h" | |
4139c1b2 | 41 | #include "dbus-unit.h" |
514f4ef5 | 42 | #include "special.h" |
c6c18be3 | 43 | #include "cgroup-util.h" |
4927fcae | 44 | #include "missing.h" |
87f0e418 LP |
45 | |
46 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
47 | [UNIT_SERVICE] = &service_vtable, | |
48 | [UNIT_TIMER] = &timer_vtable, | |
49 | [UNIT_SOCKET] = &socket_vtable, | |
50 | [UNIT_TARGET] = &target_vtable, | |
51 | [UNIT_DEVICE] = &device_vtable, | |
52 | [UNIT_MOUNT] = &mount_vtable, | |
53 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 54 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
55 | [UNIT_SWAP] = &swap_vtable, |
56 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
57 | }; |
58 | ||
87f0e418 LP |
59 | Unit *unit_new(Manager *m) { |
60 | Unit *u; | |
61 | ||
62 | assert(m); | |
63 | ||
64 | if (!(u = new0(Unit, 1))) | |
65 | return NULL; | |
66 | ||
67 | if (!(u->meta.names = set_new(string_hash_func, string_compare_func))) { | |
68 | free(u); | |
69 | return NULL; | |
70 | } | |
71 | ||
72 | u->meta.manager = m; | |
73 | u->meta.type = _UNIT_TYPE_INVALID; | |
cca098b0 | 74 | u->meta.deserialized_job = _JOB_TYPE_INVALID; |
a40eb732 | 75 | u->meta.default_dependencies = true; |
87f0e418 LP |
76 | |
77 | return u; | |
78 | } | |
79 | ||
f278026d LP |
80 | bool unit_has_name(Unit *u, const char *name) { |
81 | assert(u); | |
82 | assert(name); | |
83 | ||
84 | return !!set_get(u->meta.names, (char*) name); | |
85 | } | |
86 | ||
87f0e418 LP |
87 | int unit_add_name(Unit *u, const char *text) { |
88 | UnitType t; | |
276c3e78 | 89 | char *s, *i = NULL; |
87f0e418 LP |
90 | int r; |
91 | ||
92 | assert(u); | |
93 | assert(text); | |
94 | ||
9e2f7c11 LP |
95 | if (unit_name_is_template(text)) { |
96 | if (!u->meta.instance) | |
97 | return -EINVAL; | |
87f0e418 | 98 | |
9e2f7c11 LP |
99 | s = unit_name_replace_instance(text, u->meta.instance); |
100 | } else | |
101 | s = strdup(text); | |
87f0e418 | 102 | |
9e2f7c11 LP |
103 | if (!s) |
104 | return -ENOMEM; | |
87f0e418 | 105 | |
b9c0d441 | 106 | if (!unit_name_is_valid(s, false)) { |
9e2f7c11 LP |
107 | r = -EINVAL; |
108 | goto fail; | |
109 | } | |
e537352b | 110 | |
9e2f7c11 | 111 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 112 | |
9e2f7c11 LP |
113 | if (u->meta.type != _UNIT_TYPE_INVALID && t != u->meta.type) { |
114 | r = -EINVAL; | |
115 | goto fail; | |
116 | } | |
87f0e418 | 117 | |
9e2f7c11 LP |
118 | if ((r = unit_name_to_instance(s, &i)) < 0) |
119 | goto fail; | |
87f0e418 | 120 | |
796ba554 LP |
121 | if (i && unit_vtable[t]->no_instances) { |
122 | r = -EINVAL; | |
9e2f7c11 | 123 | goto fail; |
796ba554 | 124 | } |
9e2f7c11 | 125 | |
276c3e78 LP |
126 | /* Ensure that this unit is either instanced or not instanced, |
127 | * but not both. */ | |
128 | if (u->meta.type != _UNIT_TYPE_INVALID && !u->meta.instance != !i) { | |
9e2f7c11 LP |
129 | r = -EINVAL; |
130 | goto fail; | |
131 | } | |
132 | ||
133 | if (unit_vtable[t]->no_alias && | |
134 | !set_isempty(u->meta.names) && | |
135 | !set_get(u->meta.names, s)) { | |
136 | r = -EEXIST; | |
137 | goto fail; | |
138 | } | |
139 | ||
4f0f902f LP |
140 | if (hashmap_size(u->meta.manager->units) >= MANAGER_MAX_NAMES) { |
141 | r = -E2BIG; | |
142 | goto fail; | |
143 | } | |
144 | ||
9e2f7c11 LP |
145 | if ((r = set_put(u->meta.names, s)) < 0) { |
146 | if (r == -EEXIST) | |
147 | r = 0; | |
148 | goto fail; | |
87f0e418 LP |
149 | } |
150 | ||
151 | if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) { | |
152 | set_remove(u->meta.names, s); | |
9e2f7c11 | 153 | goto fail; |
87f0e418 LP |
154 | } |
155 | ||
e537352b | 156 | if (u->meta.type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 157 | |
e537352b | 158 | u->meta.type = t; |
9e2f7c11 LP |
159 | u->meta.id = s; |
160 | u->meta.instance = i; | |
161 | ||
ab5c3e3f | 162 | LIST_PREPEND(Meta, units_by_type, u->meta.manager->units_by_type[t], &u->meta); |
e537352b LP |
163 | |
164 | if (UNIT_VTABLE(u)->init) | |
165 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
166 | } else |
167 | free(i); | |
87f0e418 | 168 | |
c1e1601e | 169 | unit_add_to_dbus_queue(u); |
87f0e418 | 170 | return 0; |
9e2f7c11 LP |
171 | |
172 | fail: | |
173 | free(s); | |
174 | free(i); | |
175 | ||
176 | return r; | |
87f0e418 LP |
177 | } |
178 | ||
0ae97ec1 | 179 | int unit_choose_id(Unit *u, const char *name) { |
276c3e78 LP |
180 | char *s, *t = NULL, *i; |
181 | int r; | |
0ae97ec1 LP |
182 | |
183 | assert(u); | |
184 | assert(name); | |
185 | ||
9e2f7c11 LP |
186 | if (unit_name_is_template(name)) { |
187 | ||
188 | if (!u->meta.instance) | |
189 | return -EINVAL; | |
190 | ||
191 | if (!(t = unit_name_replace_instance(name, u->meta.instance))) | |
192 | return -ENOMEM; | |
193 | ||
194 | name = t; | |
195 | } | |
196 | ||
0ae97ec1 | 197 | /* Selects one of the names of this unit as the id */ |
9e2f7c11 LP |
198 | s = set_get(u->meta.names, (char*) name); |
199 | free(t); | |
0ae97ec1 | 200 | |
9e2f7c11 | 201 | if (!s) |
0ae97ec1 LP |
202 | return -ENOENT; |
203 | ||
276c3e78 LP |
204 | if ((r = unit_name_to_instance(s, &i)) < 0) |
205 | return r; | |
206 | ||
0ae97ec1 | 207 | u->meta.id = s; |
276c3e78 LP |
208 | |
209 | free(u->meta.instance); | |
210 | u->meta.instance = i; | |
211 | ||
c1e1601e | 212 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 213 | |
0ae97ec1 LP |
214 | return 0; |
215 | } | |
216 | ||
f50e0a01 LP |
217 | int unit_set_description(Unit *u, const char *description) { |
218 | char *s; | |
219 | ||
220 | assert(u); | |
221 | ||
222 | if (!(s = strdup(description))) | |
223 | return -ENOMEM; | |
224 | ||
225 | free(u->meta.description); | |
226 | u->meta.description = s; | |
c1e1601e LP |
227 | |
228 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
229 | return 0; |
230 | } | |
231 | ||
701cc384 LP |
232 | bool unit_check_gc(Unit *u) { |
233 | assert(u); | |
234 | ||
b86d44e5 LP |
235 | if (u->meta.load_state == UNIT_STUB) |
236 | return true; | |
237 | ||
701cc384 LP |
238 | if (UNIT_VTABLE(u)->no_gc) |
239 | return true; | |
240 | ||
6c073082 LP |
241 | if (u->meta.no_gc) |
242 | return true; | |
243 | ||
701cc384 LP |
244 | if (u->meta.job) |
245 | return true; | |
246 | ||
247 | if (unit_active_state(u) != UNIT_INACTIVE) | |
248 | return true; | |
249 | ||
250 | if (UNIT_VTABLE(u)->check_gc) | |
251 | if (UNIT_VTABLE(u)->check_gc(u)) | |
252 | return true; | |
253 | ||
254 | return false; | |
255 | } | |
256 | ||
87f0e418 LP |
257 | void unit_add_to_load_queue(Unit *u) { |
258 | assert(u); | |
819e213f | 259 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 LP |
260 | |
261 | if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue) | |
262 | return; | |
263 | ||
264 | LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
265 | u->meta.in_load_queue = true; | |
266 | } | |
267 | ||
23a177ef LP |
268 | void unit_add_to_cleanup_queue(Unit *u) { |
269 | assert(u); | |
270 | ||
271 | if (u->meta.in_cleanup_queue) | |
272 | return; | |
273 | ||
274 | LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
275 | u->meta.in_cleanup_queue = true; | |
276 | } | |
277 | ||
701cc384 LP |
278 | void unit_add_to_gc_queue(Unit *u) { |
279 | assert(u); | |
280 | ||
281 | if (u->meta.in_gc_queue || u->meta.in_cleanup_queue) | |
282 | return; | |
283 | ||
284 | if (unit_check_gc(u)) | |
285 | return; | |
286 | ||
287 | LIST_PREPEND(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
288 | u->meta.in_gc_queue = true; | |
289 | ||
290 | u->meta.manager->n_in_gc_queue ++; | |
291 | ||
292 | if (u->meta.manager->gc_queue_timestamp <= 0) | |
293 | u->meta.manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
294 | } | |
295 | ||
c1e1601e LP |
296 | void unit_add_to_dbus_queue(Unit *u) { |
297 | assert(u); | |
819e213f | 298 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
c1e1601e | 299 | |
94b6dfa2 | 300 | if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue) |
c1e1601e LP |
301 | return; |
302 | ||
a567261a LP |
303 | /* Shortcut things if nobody cares */ |
304 | if (!bus_has_subscriber(u->meta.manager)) { | |
94b6dfa2 LP |
305 | u->meta.sent_dbus_new_signal = true; |
306 | return; | |
307 | } | |
308 | ||
c1e1601e LP |
309 | LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); |
310 | u->meta.in_dbus_queue = true; | |
311 | } | |
312 | ||
87f0e418 LP |
313 | static void bidi_set_free(Unit *u, Set *s) { |
314 | Iterator i; | |
315 | Unit *other; | |
316 | ||
317 | assert(u); | |
318 | ||
319 | /* Frees the set and makes sure we are dropped from the | |
320 | * inverse pointers */ | |
321 | ||
322 | SET_FOREACH(other, s, i) { | |
323 | UnitDependency d; | |
324 | ||
325 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
326 | set_remove(other->meta.dependencies[d], u); | |
701cc384 LP |
327 | |
328 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
329 | } |
330 | ||
331 | set_free(s); | |
332 | } | |
333 | ||
334 | void unit_free(Unit *u) { | |
335 | UnitDependency d; | |
336 | Iterator i; | |
337 | char *t; | |
338 | ||
339 | assert(u); | |
340 | ||
c1e1601e LP |
341 | bus_unit_send_removed_signal(u); |
342 | ||
a013b84b LP |
343 | if (u->meta.load_state != UNIT_STUB) |
344 | if (UNIT_VTABLE(u)->done) | |
345 | UNIT_VTABLE(u)->done(u); | |
346 | ||
87f0e418 LP |
347 | SET_FOREACH(t, u->meta.names, i) |
348 | hashmap_remove_value(u->meta.manager->units, t, u); | |
349 | ||
964e0949 LP |
350 | if (u->meta.job) |
351 | job_free(u->meta.job); | |
352 | ||
353 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
354 | bidi_set_free(u, u->meta.dependencies[d]); | |
355 | ||
ef734fd6 | 356 | if (u->meta.type != _UNIT_TYPE_INVALID) |
ab5c3e3f | 357 | LIST_REMOVE(Meta, units_by_type, u->meta.manager->units_by_type[u->meta.type], &u->meta); |
ef734fd6 | 358 | |
87f0e418 LP |
359 | if (u->meta.in_load_queue) |
360 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
361 | ||
c1e1601e LP |
362 | if (u->meta.in_dbus_queue) |
363 | LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
364 | ||
23a177ef LP |
365 | if (u->meta.in_cleanup_queue) |
366 | LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
367 | ||
701cc384 LP |
368 | if (u->meta.in_gc_queue) { |
369 | LIST_REMOVE(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
370 | u->meta.manager->n_in_gc_queue--; | |
371 | } | |
372 | ||
38c52d46 | 373 | cgroup_bonding_free_list(u->meta.cgroup_bondings, u->meta.manager->n_serializing <= 0); |
87f0e418 | 374 | |
87f0e418 | 375 | free(u->meta.description); |
6be1e7d5 | 376 | free(u->meta.fragment_path); |
87f0e418 | 377 | |
53ec43c6 | 378 | set_free_free(u->meta.names); |
87f0e418 | 379 | |
52661efd LP |
380 | condition_free_list(u->meta.conditions); |
381 | ||
9e2f7c11 | 382 | free(u->meta.instance); |
87f0e418 LP |
383 | free(u); |
384 | } | |
385 | ||
386 | UnitActiveState unit_active_state(Unit *u) { | |
387 | assert(u); | |
388 | ||
6124958c LP |
389 | if (u->meta.load_state == UNIT_MERGED) |
390 | return unit_active_state(unit_follow_merge(u)); | |
391 | ||
392 | /* After a reload it might happen that a unit is not correctly | |
393 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 394 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
395 | |
396 | return UNIT_VTABLE(u)->active_state(u); | |
397 | } | |
398 | ||
10a94420 LP |
399 | const char* unit_sub_state_to_string(Unit *u) { |
400 | assert(u); | |
401 | ||
402 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
403 | } | |
404 | ||
23a177ef LP |
405 | static void complete_move(Set **s, Set **other) { |
406 | assert(s); | |
407 | assert(other); | |
87f0e418 | 408 | |
23a177ef LP |
409 | if (!*other) |
410 | return; | |
87f0e418 LP |
411 | |
412 | if (*s) | |
23a177ef LP |
413 | set_move(*s, *other); |
414 | else { | |
415 | *s = *other; | |
416 | *other = NULL; | |
417 | } | |
418 | } | |
87f0e418 | 419 | |
23a177ef LP |
420 | static void merge_names(Unit *u, Unit *other) { |
421 | char *t; | |
422 | Iterator i; | |
87f0e418 | 423 | |
23a177ef LP |
424 | assert(u); |
425 | assert(other); | |
426 | ||
427 | complete_move(&u->meta.names, &other->meta.names); | |
428 | ||
53ec43c6 | 429 | set_free_free(other->meta.names); |
23a177ef LP |
430 | other->meta.names = NULL; |
431 | other->meta.id = NULL; | |
432 | ||
433 | SET_FOREACH(t, u->meta.names, i) | |
434 | assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0); | |
87f0e418 LP |
435 | } |
436 | ||
23a177ef LP |
437 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
438 | Iterator i; | |
439 | Unit *back; | |
87f0e418 | 440 | int r; |
23a177ef LP |
441 | |
442 | assert(u); | |
443 | assert(other); | |
444 | assert(d < _UNIT_DEPENDENCY_MAX); | |
445 | ||
83a95334 | 446 | /* Fix backwards pointers */ |
23a177ef LP |
447 | SET_FOREACH(back, other->meta.dependencies[d], i) { |
448 | UnitDependency k; | |
449 | ||
450 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
451 | if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) { | |
452 | ||
453 | if (r == -EEXIST) | |
454 | set_remove(back->meta.dependencies[k], other); | |
455 | else | |
456 | assert(r == -ENOENT); | |
457 | } | |
458 | } | |
459 | ||
460 | complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]); | |
461 | ||
462 | set_free(other->meta.dependencies[d]); | |
463 | other->meta.dependencies[d] = NULL; | |
464 | } | |
465 | ||
466 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
467 | UnitDependency d; |
468 | ||
469 | assert(u); | |
470 | assert(other); | |
471 | assert(u->meta.manager == other->meta.manager); | |
9e2f7c11 | 472 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 | 473 | |
cc916967 LP |
474 | other = unit_follow_merge(other); |
475 | ||
23a177ef LP |
476 | if (other == u) |
477 | return 0; | |
478 | ||
9e2f7c11 LP |
479 | if (u->meta.type != other->meta.type) |
480 | return -EINVAL; | |
481 | ||
276c3e78 | 482 | if (!u->meta.instance != !other->meta.instance) |
87f0e418 LP |
483 | return -EINVAL; |
484 | ||
cc916967 | 485 | if (other->meta.load_state != UNIT_STUB && |
fdf20a31 | 486 | other->meta.load_state != UNIT_ERROR) |
23a177ef | 487 | return -EEXIST; |
87f0e418 | 488 | |
819e213f LP |
489 | if (other->meta.job) |
490 | return -EEXIST; | |
491 | ||
fdf20a31 | 492 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
493 | return -EEXIST; |
494 | ||
87f0e418 | 495 | /* Merge names */ |
23a177ef | 496 | merge_names(u, other); |
87f0e418 LP |
497 | |
498 | /* Merge dependencies */ | |
499 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 500 | merge_dependencies(u, other, d); |
87f0e418 | 501 | |
23a177ef LP |
502 | other->meta.load_state = UNIT_MERGED; |
503 | other->meta.merged_into = u; | |
504 | ||
3616a49c LP |
505 | /* If there is still some data attached to the other node, we |
506 | * don't need it anymore, and can free it. */ | |
507 | if (other->meta.load_state != UNIT_STUB) | |
508 | if (UNIT_VTABLE(other)->done) | |
509 | UNIT_VTABLE(other)->done(other); | |
510 | ||
511 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
512 | unit_add_to_cleanup_queue(other); |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
517 | int unit_merge_by_name(Unit *u, const char *name) { | |
518 | Unit *other; | |
9e2f7c11 LP |
519 | int r; |
520 | char *s = NULL; | |
23a177ef LP |
521 | |
522 | assert(u); | |
523 | assert(name); | |
524 | ||
9e2f7c11 LP |
525 | if (unit_name_is_template(name)) { |
526 | if (!u->meta.instance) | |
527 | return -EINVAL; | |
528 | ||
529 | if (!(s = unit_name_replace_instance(name, u->meta.instance))) | |
530 | return -ENOMEM; | |
531 | ||
532 | name = s; | |
533 | } | |
534 | ||
23a177ef | 535 | if (!(other = manager_get_unit(u->meta.manager, name))) |
9e2f7c11 LP |
536 | r = unit_add_name(u, name); |
537 | else | |
538 | r = unit_merge(u, other); | |
23a177ef | 539 | |
9e2f7c11 LP |
540 | free(s); |
541 | return r; | |
23a177ef LP |
542 | } |
543 | ||
544 | Unit* unit_follow_merge(Unit *u) { | |
545 | assert(u); | |
546 | ||
547 | while (u->meta.load_state == UNIT_MERGED) | |
548 | assert_se(u = u->meta.merged_into); | |
549 | ||
550 | return u; | |
551 | } | |
552 | ||
553 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
554 | int r; | |
555 | ||
556 | assert(u); | |
557 | assert(c); | |
558 | ||
ecc6e2b8 LP |
559 | if (c->std_output != EXEC_OUTPUT_KMSG && |
560 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
28dbc1e8 LP |
561 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
562 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
ecc6e2b8 | 563 | c->std_error != EXEC_OUTPUT_KMSG && |
28dbc1e8 LP |
564 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && |
565 | c->std_error != EXEC_OUTPUT_KMSG && | |
566 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) | |
23a177ef LP |
567 | return 0; |
568 | ||
569 | /* If syslog or kernel logging is requested, make sure our own | |
570 | * logging daemon is run first. */ | |
571 | ||
a3d4e06d | 572 | if (u->meta.manager->running_as == MANAGER_SYSTEM) |
ffd73e35 | 573 | if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
574 | return r; |
575 | ||
87f0e418 LP |
576 | return 0; |
577 | } | |
578 | ||
87f0e418 LP |
579 | const char *unit_description(Unit *u) { |
580 | assert(u); | |
581 | ||
582 | if (u->meta.description) | |
583 | return u->meta.description; | |
584 | ||
9f151f29 | 585 | return strna(u->meta.id); |
87f0e418 LP |
586 | } |
587 | ||
588 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
87f0e418 LP |
589 | char *t; |
590 | UnitDependency d; | |
591 | Iterator i; | |
47be870b LP |
592 | char *p2; |
593 | const char *prefix2; | |
8e274523 | 594 | CGroupBonding *b; |
173e3821 LP |
595 | char |
596 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
597 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
598 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
599 | timestamp4[FORMAT_TIMESTAMP_MAX], |
600 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 601 | Unit *following; |
87f0e418 LP |
602 | |
603 | assert(u); | |
9e2f7c11 | 604 | assert(u->meta.type >= 0); |
87f0e418 LP |
605 | |
606 | if (!prefix) | |
607 | prefix = ""; | |
47be870b LP |
608 | p2 = strappend(prefix, "\t"); |
609 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
610 | |
611 | fprintf(f, | |
40d50879 | 612 | "%s-> Unit %s:\n" |
87f0e418 | 613 | "%s\tDescription: %s\n" |
9e2f7c11 | 614 | "%s\tInstance: %s\n" |
87f0e418 | 615 | "%s\tUnit Load State: %s\n" |
2fad8195 | 616 | "%s\tUnit Active State: %s\n" |
173e3821 | 617 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 618 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 619 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 620 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 LP |
621 | "%s\tGC Check Good: %s\n" |
622 | "%s\tNeed Daemon Reload: %s\n", | |
9e2f7c11 | 623 | prefix, u->meta.id, |
87f0e418 | 624 | prefix, unit_description(u), |
9e2f7c11 | 625 | prefix, strna(u->meta.instance), |
94f04347 | 626 | prefix, unit_load_state_to_string(u->meta.load_state), |
2fad8195 | 627 | prefix, unit_active_state_to_string(unit_active_state(u)), |
871d7de4 LP |
628 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)), |
629 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)), | |
630 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)), | |
631 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)), | |
45fb0699 LP |
632 | prefix, yes_no(unit_check_gc(u)), |
633 | prefix, yes_no(unit_need_daemon_reload(u))); | |
0301abf4 | 634 | |
87f0e418 LP |
635 | SET_FOREACH(t, u->meta.names, i) |
636 | fprintf(f, "%s\tName: %s\n", prefix, t); | |
637 | ||
a7f241db LP |
638 | if ((following = unit_following(u))) |
639 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->meta.id); | |
8fe914ec | 640 | |
23a177ef LP |
641 | if (u->meta.fragment_path) |
642 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path); | |
643 | ||
faf919f1 LP |
644 | if (u->meta.job_timeout > 0) |
645 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->meta.job_timeout)); | |
646 | ||
52661efd LP |
647 | condition_dump_list(u->meta.conditions, f, prefix); |
648 | ||
2791a8f8 LP |
649 | if (dual_timestamp_is_set(&u->meta.condition_timestamp)) |
650 | fprintf(f, | |
651 | "%s\tCondition Timestamp: %s\n" | |
652 | "%s\tCondition Result: %s\n", | |
653 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.condition_timestamp.realtime)), | |
654 | prefix, yes_no(u->meta.condition_result)); | |
655 | ||
87f0e418 LP |
656 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
657 | Unit *other; | |
658 | ||
87f0e418 | 659 | SET_FOREACH(other, u->meta.dependencies[d], i) |
9e2f7c11 | 660 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id); |
87f0e418 LP |
661 | } |
662 | ||
23a177ef | 663 | if (u->meta.load_state == UNIT_LOADED) { |
b0650475 | 664 | fprintf(f, |
a40eb732 | 665 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
666 | "%s\tRefuseManualStart: %s\n" |
667 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 668 | "%s\tDefaultDependencies: %s\n" |
c8f4d764 | 669 | "%s\tOnFailureIsolate: %s\n" |
7a6000a6 LP |
670 | "%s\tIgnoreOnIsolate: %s\n" |
671 | "%s\tIgnoreOnSnapshot: %s\n", | |
a40eb732 | 672 | prefix, yes_no(u->meta.stop_when_unneeded), |
b5e9dba8 LP |
673 | prefix, yes_no(u->meta.refuse_manual_start), |
674 | prefix, yes_no(u->meta.refuse_manual_stop), | |
222ae6a8 | 675 | prefix, yes_no(u->meta.default_dependencies), |
c8f4d764 | 676 | prefix, yes_no(u->meta.on_failure_isolate), |
7a6000a6 LP |
677 | prefix, yes_no(u->meta.ignore_on_isolate), |
678 | prefix, yes_no(u->meta.ignore_on_snapshot)); | |
b0650475 | 679 | |
23a177ef LP |
680 | LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) |
681 | fprintf(f, "%s\tControlGroup: %s:%s\n", | |
682 | prefix, b->controller, b->path); | |
8e274523 | 683 | |
23a177ef LP |
684 | if (UNIT_VTABLE(u)->dump) |
685 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 LP |
686 | |
687 | } else if (u->meta.load_state == UNIT_MERGED) | |
688 | fprintf(f, | |
689 | "%s\tMerged into: %s\n", | |
9e2f7c11 | 690 | prefix, u->meta.merged_into->meta.id); |
fdf20a31 | 691 | else if (u->meta.load_state == UNIT_ERROR) |
8821a00f LP |
692 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->meta.load_error)); |
693 | ||
87f0e418 LP |
694 | |
695 | if (u->meta.job) | |
696 | job_dump(u->meta.job, f, prefix2); | |
697 | ||
47be870b | 698 | free(p2); |
87f0e418 LP |
699 | } |
700 | ||
701 | /* Common implementation for multiple backends */ | |
e537352b | 702 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
703 | int r; |
704 | ||
705 | assert(u); | |
23a177ef LP |
706 | |
707 | /* Load a .service file */ | |
e537352b | 708 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
709 | return r; |
710 | ||
e537352b | 711 | if (u->meta.load_state == UNIT_STUB) |
23a177ef LP |
712 | return -ENOENT; |
713 | ||
714 | /* Load drop-in directory data */ | |
715 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
716 | return r; | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
721 | /* Common implementation for multiple backends */ | |
e537352b | 722 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 723 | int r; |
87f0e418 LP |
724 | |
725 | assert(u); | |
726 | ||
23a177ef LP |
727 | /* Same as unit_load_fragment_and_dropin(), but whether |
728 | * something can be loaded or not doesn't matter. */ | |
729 | ||
730 | /* Load a .service file */ | |
e537352b | 731 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
732 | return r; |
733 | ||
e537352b LP |
734 | if (u->meta.load_state == UNIT_STUB) |
735 | u->meta.load_state = UNIT_LOADED; | |
d46de8a1 | 736 | |
87f0e418 | 737 | /* Load drop-in directory data */ |
23a177ef | 738 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
739 | return r; |
740 | ||
23a177ef | 741 | return 0; |
87f0e418 LP |
742 | } |
743 | ||
bba34eed | 744 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
745 | assert(u); |
746 | assert(target); | |
747 | ||
748 | if (target->meta.type != UNIT_TARGET) | |
749 | return 0; | |
750 | ||
35b8ca3a | 751 | /* Only add the dependency if both units are loaded, so that |
bba34eed LP |
752 | * that loop check below is reliable */ |
753 | if (u->meta.load_state != UNIT_LOADED || | |
754 | target->meta.load_state != UNIT_LOADED) | |
755 | return 0; | |
756 | ||
21256a2b LP |
757 | /* If either side wants no automatic dependencies, then let's |
758 | * skip this */ | |
759 | if (!u->meta.default_dependencies || | |
760 | target->meta.default_dependencies) | |
761 | return 0; | |
762 | ||
98bc2000 LP |
763 | /* Don't create loops */ |
764 | if (set_get(target->meta.dependencies[UNIT_BEFORE], u)) | |
765 | return 0; | |
766 | ||
767 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
768 | } | |
769 | ||
770 | static int unit_add_default_dependencies(Unit *u) { | |
21256a2b LP |
771 | static const UnitDependency deps[] = { |
772 | UNIT_REQUIRED_BY, | |
773 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
774 | UNIT_WANTED_BY, | |
775 | UNIT_BOUND_BY | |
776 | }; | |
777 | ||
bba34eed | 778 | Unit *target; |
98bc2000 LP |
779 | Iterator i; |
780 | int r; | |
21256a2b | 781 | unsigned k; |
98bc2000 LP |
782 | |
783 | assert(u); | |
784 | ||
21256a2b LP |
785 | for (k = 0; k < ELEMENTSOF(deps); k++) |
786 | SET_FOREACH(target, u->meta.dependencies[deps[k]], i) | |
787 | if ((r = unit_add_default_target_dependency(u, target)) < 0) | |
788 | return r; | |
b81884e7 | 789 | |
98bc2000 LP |
790 | return 0; |
791 | } | |
792 | ||
87f0e418 LP |
793 | int unit_load(Unit *u) { |
794 | int r; | |
795 | ||
796 | assert(u); | |
797 | ||
798 | if (u->meta.in_load_queue) { | |
799 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
800 | u->meta.in_load_queue = false; | |
801 | } | |
802 | ||
e537352b LP |
803 | if (u->meta.type == _UNIT_TYPE_INVALID) |
804 | return -EINVAL; | |
805 | ||
87f0e418 LP |
806 | if (u->meta.load_state != UNIT_STUB) |
807 | return 0; | |
808 | ||
e537352b LP |
809 | if (UNIT_VTABLE(u)->load) |
810 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 811 | goto fail; |
23a177ef | 812 | |
e537352b | 813 | if (u->meta.load_state == UNIT_STUB) { |
23a177ef LP |
814 | r = -ENOENT; |
815 | goto fail; | |
816 | } | |
817 | ||
98bc2000 LP |
818 | if (u->meta.load_state == UNIT_LOADED && |
819 | u->meta.default_dependencies) | |
820 | if ((r = unit_add_default_dependencies(u)) < 0) | |
821 | goto fail; | |
822 | ||
f68319bb LP |
823 | if (u->meta.on_failure_isolate && |
824 | set_size(u->meta.dependencies[UNIT_ON_FAILURE]) > 1) { | |
825 | ||
826 | log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", | |
827 | u->meta.id); | |
828 | ||
829 | r = -EINVAL; | |
830 | goto fail; | |
831 | } | |
832 | ||
23a177ef LP |
833 | assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into); |
834 | ||
835 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 836 | unit_add_to_gc_queue(u); |
87f0e418 | 837 | |
87f0e418 LP |
838 | return 0; |
839 | ||
840 | fail: | |
fdf20a31 | 841 | u->meta.load_state = UNIT_ERROR; |
8821a00f | 842 | u->meta.load_error = r; |
c1e1601e | 843 | unit_add_to_dbus_queue(u); |
23a177ef | 844 | |
8821a00f | 845 | log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); |
23a177ef | 846 | |
87f0e418 LP |
847 | return r; |
848 | } | |
849 | ||
90bbc946 LP |
850 | bool unit_condition_test(Unit *u) { |
851 | assert(u); | |
852 | ||
853 | dual_timestamp_get(&u->meta.condition_timestamp); | |
854 | u->meta.condition_result = condition_test_list(u->meta.conditions); | |
855 | ||
856 | return u->meta.condition_result; | |
857 | } | |
858 | ||
87f0e418 | 859 | /* Errors: |
d5159713 LP |
860 | * -EBADR: This unit type does not support starting. |
861 | * -EALREADY: Unit is already started. | |
862 | * -EAGAIN: An operation is already in progress. Retry later. | |
863 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
864 | */ |
865 | int unit_start(Unit *u) { | |
866 | UnitActiveState state; | |
92ab323c | 867 | Unit *following; |
87f0e418 LP |
868 | |
869 | assert(u); | |
870 | ||
6124958c LP |
871 | if (u->meta.load_state != UNIT_LOADED) |
872 | return -EINVAL; | |
873 | ||
7898b0cf LP |
874 | /* If this is already (being) started, then this will |
875 | * succeed. Note that this will even succeed if this unit is | |
876 | * not startable by the user. This is relied on to detect when | |
877 | * we need to wait for units and when waiting is finished. */ | |
87f0e418 LP |
878 | state = unit_active_state(u); |
879 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
880 | return -EALREADY; | |
881 | ||
52661efd | 882 | /* If the conditions failed, don't do anything at all */ |
90bbc946 | 883 | if (!unit_condition_test(u)) { |
52661efd LP |
884 | log_debug("Starting of %s requested but condition failed. Ignoring.", u->meta.id); |
885 | return -EALREADY; | |
886 | } | |
887 | ||
92ab323c LP |
888 | /* Forward to the main object, if we aren't it. */ |
889 | if ((following = unit_following(u))) { | |
890 | log_debug("Redirecting start request from %s to %s.", u->meta.id, following->meta.id); | |
891 | return unit_start(following); | |
892 | } | |
893 | ||
894 | /* If it is stopped, but we cannot start it, then fail */ | |
895 | if (!UNIT_VTABLE(u)->start) | |
896 | return -EBADR; | |
897 | ||
87f0e418 LP |
898 | /* We don't suppress calls to ->start() here when we are |
899 | * already starting, to allow this request to be used as a | |
900 | * "hurry up" call, for example when the unit is in some "auto | |
901 | * restart" state where it waits for a holdoff timer to elapse | |
902 | * before it will start again. */ | |
903 | ||
c1e1601e | 904 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
905 | |
906 | unit_status_printf(u, "Starting %s...\n", unit_description(u)); | |
87f0e418 LP |
907 | return UNIT_VTABLE(u)->start(u); |
908 | } | |
909 | ||
910 | bool unit_can_start(Unit *u) { | |
911 | assert(u); | |
912 | ||
913 | return !!UNIT_VTABLE(u)->start; | |
914 | } | |
915 | ||
2528a7a6 LP |
916 | bool unit_can_isolate(Unit *u) { |
917 | assert(u); | |
918 | ||
919 | return unit_can_start(u) && | |
920 | u->meta.allow_isolate; | |
921 | } | |
922 | ||
87f0e418 LP |
923 | /* Errors: |
924 | * -EBADR: This unit type does not support stopping. | |
925 | * -EALREADY: Unit is already stopped. | |
926 | * -EAGAIN: An operation is already in progress. Retry later. | |
927 | */ | |
928 | int unit_stop(Unit *u) { | |
929 | UnitActiveState state; | |
92ab323c | 930 | Unit *following; |
87f0e418 LP |
931 | |
932 | assert(u); | |
933 | ||
87f0e418 | 934 | state = unit_active_state(u); |
fdf20a31 | 935 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
936 | return -EALREADY; |
937 | ||
92ab323c LP |
938 | if ((following = unit_following(u))) { |
939 | log_debug("Redirecting stop request from %s to %s.", u->meta.id, following->meta.id); | |
940 | return unit_stop(following); | |
941 | } | |
942 | ||
7898b0cf LP |
943 | if (!UNIT_VTABLE(u)->stop) |
944 | return -EBADR; | |
945 | ||
c1e1601e | 946 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
947 | |
948 | unit_status_printf(u, "Stopping %s...\n", unit_description(u)); | |
87f0e418 LP |
949 | return UNIT_VTABLE(u)->stop(u); |
950 | } | |
951 | ||
952 | /* Errors: | |
953 | * -EBADR: This unit type does not support reloading. | |
954 | * -ENOEXEC: Unit is not started. | |
955 | * -EAGAIN: An operation is already in progress. Retry later. | |
956 | */ | |
957 | int unit_reload(Unit *u) { | |
958 | UnitActiveState state; | |
92ab323c | 959 | Unit *following; |
87f0e418 LP |
960 | |
961 | assert(u); | |
962 | ||
6124958c LP |
963 | if (u->meta.load_state != UNIT_LOADED) |
964 | return -EINVAL; | |
965 | ||
87f0e418 LP |
966 | if (!unit_can_reload(u)) |
967 | return -EBADR; | |
968 | ||
969 | state = unit_active_state(u); | |
e364ad06 | 970 | if (state == UNIT_RELOADING) |
87f0e418 LP |
971 | return -EALREADY; |
972 | ||
e364ad06 | 973 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
974 | return -ENOEXEC; |
975 | ||
92ab323c LP |
976 | if ((following = unit_following(u))) { |
977 | log_debug("Redirecting reload request from %s to %s.", u->meta.id, following->meta.id); | |
978 | return unit_reload(following); | |
979 | } | |
980 | ||
c1e1601e | 981 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
982 | return UNIT_VTABLE(u)->reload(u); |
983 | } | |
984 | ||
985 | bool unit_can_reload(Unit *u) { | |
986 | assert(u); | |
987 | ||
988 | if (!UNIT_VTABLE(u)->reload) | |
989 | return false; | |
990 | ||
991 | if (!UNIT_VTABLE(u)->can_reload) | |
992 | return true; | |
993 | ||
994 | return UNIT_VTABLE(u)->can_reload(u); | |
995 | } | |
996 | ||
b4a16b7b | 997 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
998 | Iterator i; |
999 | Unit *other; | |
1000 | ||
1001 | assert(u); | |
1002 | ||
1003 | /* If this service shall be shut down when unneeded then do | |
1004 | * so. */ | |
1005 | ||
1006 | if (!u->meta.stop_when_unneeded) | |
1007 | return; | |
1008 | ||
1009 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1010 | return; | |
1011 | ||
1012 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
1013 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1014 | return; | |
1015 | ||
9e2f7c11 | 1016 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f3bff0eb LP |
1017 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1018 | return; | |
1019 | ||
1020 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i) | |
1021 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1022 | return; | |
1023 | ||
b81884e7 LP |
1024 | SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i) |
1025 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1026 | return; | |
1027 | ||
54165a39 | 1028 | log_info("Service %s is not needed anymore. Stopping.", u->meta.id); |
f3bff0eb LP |
1029 | |
1030 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
398ef8ba | 1031 | manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1032 | } |
1033 | ||
87f0e418 LP |
1034 | static void retroactively_start_dependencies(Unit *u) { |
1035 | Iterator i; | |
1036 | Unit *other; | |
1037 | ||
1038 | assert(u); | |
1039 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1040 | ||
1041 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
b81884e7 LP |
1042 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1043 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
1044 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); | |
1045 | ||
1046 | SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i) | |
1047 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && | |
1048 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1049 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1050 | |
9e2f7c11 | 1051 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
b81884e7 LP |
1052 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1053 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1054 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
1055 | |
1056 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
b81884e7 LP |
1057 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1058 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1059 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1060 | |
1061 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
b81884e7 LP |
1062 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1063 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1064 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
1065 | |
1066 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) | |
b81884e7 | 1067 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
398ef8ba | 1068 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 LP |
1069 | |
1070 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i) | |
b81884e7 | 1071 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
69dd2852 | 1072 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1073 | } |
1074 | ||
1075 | static void retroactively_stop_dependencies(Unit *u) { | |
1076 | Iterator i; | |
1077 | Unit *other; | |
1078 | ||
1079 | assert(u); | |
1080 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1081 | ||
b81884e7 LP |
1082 | /* Pull down units which are bound to us recursively if enabled */ |
1083 | SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i) | |
1084 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
f14e15f8 | 1085 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
f3bff0eb LP |
1086 | |
1087 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
1088 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
87f0e418 | 1089 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1090 | unit_check_unneeded(other); |
9e2f7c11 | 1091 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1092 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1093 | unit_check_unneeded(other); |
f3bff0eb LP |
1094 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) |
1095 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
b4a16b7b | 1096 | unit_check_unneeded(other); |
f3bff0eb LP |
1097 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) |
1098 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
b4a16b7b | 1099 | unit_check_unneeded(other); |
9e2f7c11 | 1100 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1101 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1102 | unit_check_unneeded(other); |
b81884e7 LP |
1103 | SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i) |
1104 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1105 | unit_check_unneeded(other); | |
87f0e418 LP |
1106 | } |
1107 | ||
c0daa706 LP |
1108 | void unit_trigger_on_failure(Unit *u) { |
1109 | Unit *other; | |
1110 | Iterator i; | |
1111 | ||
1112 | assert(u); | |
1113 | ||
222ae6a8 LP |
1114 | if (set_size(u->meta.dependencies[UNIT_ON_FAILURE]) <= 0) |
1115 | return; | |
1116 | ||
1117 | log_info("Triggering OnFailure= dependencies of %s.", u->meta.id); | |
1118 | ||
1119 | SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i) { | |
1120 | int r; | |
1121 | ||
1122 | if ((r = manager_add_job(u->meta.manager, JOB_START, other, u->meta.on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0) | |
1123 | log_error("Failed to enqueue OnFailure= job: %s", strerror(-r)); | |
1124 | } | |
c0daa706 LP |
1125 | } |
1126 | ||
e2f3b44c | 1127 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
7e6e7b06 | 1128 | bool unexpected; |
a096ed36 | 1129 | |
87f0e418 LP |
1130 | assert(u); |
1131 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1132 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1133 | |
8e471ccd LP |
1134 | /* Note that this is called for all low-level state changes, |
1135 | * even if they might map to the same high-level | |
1136 | * UnitActiveState! That means that ns == os is OK an expected | |
1137 | * behaviour here. For example: if a mount point is remounted | |
cd6d0a45 | 1138 | * this function will be called too! */ |
87f0e418 | 1139 | |
bdbf9951 LP |
1140 | if (u->meta.manager->n_deserializing <= 0) { |
1141 | dual_timestamp ts; | |
173e3821 | 1142 | |
bdbf9951 | 1143 | dual_timestamp_get(&ts); |
173e3821 | 1144 | |
bdbf9951 LP |
1145 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
1146 | u->meta.inactive_exit_timestamp = ts; | |
1147 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
1148 | u->meta.inactive_enter_timestamp = ts; | |
1149 | ||
1150 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
1151 | u->meta.active_enter_timestamp = ts; | |
1152 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
1153 | u->meta.active_exit_timestamp = ts; | |
1154 | ||
1155 | timer_unit_notify(u, ns); | |
1156 | path_unit_notify(u, ns); | |
1157 | } | |
87f0e418 | 1158 | |
fdf20a31 | 1159 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
fb385181 LP |
1160 | cgroup_bonding_trim_list(u->meta.cgroup_bondings, true); |
1161 | ||
87f0e418 | 1162 | if (u->meta.job) { |
7e6e7b06 | 1163 | unexpected = false; |
87f0e418 LP |
1164 | |
1165 | if (u->meta.job->state == JOB_WAITING) | |
1166 | ||
1167 | /* So we reached a different state for this | |
1168 | * job. Let's see if we can run it now if it | |
1169 | * failed previously due to EAGAIN. */ | |
c1e1601e | 1170 | job_add_to_run_queue(u->meta.job); |
87f0e418 | 1171 | |
b410e6b9 | 1172 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1173 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1174 | * hence needs to invalidate jobs. */ |
87f0e418 | 1175 | |
b410e6b9 | 1176 | switch (u->meta.job->type) { |
87f0e418 | 1177 | |
b410e6b9 LP |
1178 | case JOB_START: |
1179 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1180 | |
b410e6b9 | 1181 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5d44db4a | 1182 | job_finish_and_invalidate(u->meta.job, JOB_DONE); |
b410e6b9 LP |
1183 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
1184 | unexpected = true; | |
41b02ec7 | 1185 | |
fdf20a31 | 1186 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5d44db4a | 1187 | job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
b410e6b9 | 1188 | } |
87f0e418 | 1189 | |
b410e6b9 | 1190 | break; |
87f0e418 | 1191 | |
b410e6b9 LP |
1192 | case JOB_RELOAD: |
1193 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1194 | |
b410e6b9 | 1195 | if (u->meta.job->state == JOB_RUNNING) { |
a096ed36 | 1196 | if (ns == UNIT_ACTIVE) |
5d44db4a | 1197 | job_finish_and_invalidate(u->meta.job, reload_success ? JOB_DONE : JOB_FAILED); |
032ff4af | 1198 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1199 | unexpected = true; |
41b02ec7 | 1200 | |
fdf20a31 | 1201 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5d44db4a | 1202 | job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
a096ed36 | 1203 | } |
b410e6b9 | 1204 | } |
87f0e418 | 1205 | |
b410e6b9 | 1206 | break; |
87f0e418 | 1207 | |
b410e6b9 LP |
1208 | case JOB_STOP: |
1209 | case JOB_RESTART: | |
1210 | case JOB_TRY_RESTART: | |
87f0e418 | 1211 | |
fdf20a31 | 1212 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5d44db4a | 1213 | job_finish_and_invalidate(u->meta.job, JOB_DONE); |
b410e6b9 LP |
1214 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
1215 | unexpected = true; | |
5d44db4a | 1216 | job_finish_and_invalidate(u->meta.job, JOB_FAILED); |
b410e6b9 | 1217 | } |
87f0e418 | 1218 | |
b410e6b9 | 1219 | break; |
87f0e418 | 1220 | |
b410e6b9 LP |
1221 | default: |
1222 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1223 | } |
87f0e418 | 1224 | |
7e6e7b06 LP |
1225 | } else |
1226 | unexpected = true; | |
1227 | ||
bdbf9951 | 1228 | if (u->meta.manager->n_deserializing <= 0) { |
f3bff0eb | 1229 | |
bdbf9951 LP |
1230 | /* If this state change happened without being |
1231 | * requested by a job, then let's retroactively start | |
1232 | * or stop dependencies. We skip that step when | |
1233 | * deserializing, since we don't want to create any | |
1234 | * additional jobs just because something is already | |
1235 | * activated. */ | |
1236 | ||
1237 | if (unexpected) { | |
1238 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1239 | retroactively_start_dependencies(u); | |
1240 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1241 | retroactively_stop_dependencies(u); | |
1242 | } | |
5de9682c | 1243 | |
bdbf9951 LP |
1244 | if (ns != os && ns == UNIT_FAILED) { |
1245 | log_notice("Unit %s entered failed state.", u->meta.id); | |
1246 | unit_trigger_on_failure(u); | |
cd6d0a45 | 1247 | } |
3b2775c5 | 1248 | } |
e537352b | 1249 | |
3b2775c5 LP |
1250 | /* Some names are special */ |
1251 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1252 | ||
1253 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1254 | /* The bus just might have become available, | |
1255 | * hence try to connect to it, if we aren't | |
1256 | * yet connected. */ | |
1257 | bus_init(u->meta.manager, true); | |
1258 | ||
1259 | if (u->meta.type == UNIT_SERVICE && | |
1260 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && | |
1261 | u->meta.manager->n_deserializing <= 0) { | |
1262 | /* Write audit record if we have just finished starting up */ | |
1263 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, true); | |
1264 | u->meta.in_audit = true; | |
1265 | } | |
e983b760 | 1266 | |
3b2775c5 LP |
1267 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
1268 | manager_send_unit_plymouth(u->meta.manager, u); | |
bdbf9951 | 1269 | |
3b2775c5 | 1270 | } else { |
bdbf9951 | 1271 | |
3b2775c5 LP |
1272 | /* We don't care about D-Bus here, since we'll get an |
1273 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1274 | |
3b2775c5 LP |
1275 | if (u->meta.type == UNIT_SERVICE && |
1276 | UNIT_IS_INACTIVE_OR_FAILED(ns) && | |
1277 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
1278 | u->meta.manager->n_deserializing <= 0) { | |
4927fcae | 1279 | |
3b2775c5 LP |
1280 | /* Hmm, if there was no start record written |
1281 | * write it now, so that we always have a nice | |
1282 | * pair */ | |
1283 | if (!u->meta.in_audit) { | |
1284 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 1285 | |
3b2775c5 LP |
1286 | if (ns == UNIT_INACTIVE) |
1287 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true); | |
1288 | } else | |
1289 | /* Write audit record if we have just finished shutting down */ | |
1290 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
bdbf9951 | 1291 | |
3b2775c5 | 1292 | u->meta.in_audit = false; |
cd6d0a45 | 1293 | } |
f278026d LP |
1294 | } |
1295 | ||
3b2775c5 LP |
1296 | manager_recheck_syslog(u->meta.manager); |
1297 | ||
f3bff0eb LP |
1298 | /* Maybe we finished startup and are now ready for being |
1299 | * stopped because unneeded? */ | |
b4a16b7b | 1300 | unit_check_unneeded(u); |
c1e1601e LP |
1301 | |
1302 | unit_add_to_dbus_queue(u); | |
701cc384 | 1303 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1304 | } |
1305 | ||
acbb0225 | 1306 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1307 | struct epoll_event ev; |
1308 | ||
1309 | assert(u); | |
1310 | assert(fd >= 0); | |
acbb0225 | 1311 | assert(w); |
ea430986 | 1312 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1313 | |
1314 | zero(ev); | |
acbb0225 | 1315 | ev.data.ptr = w; |
87f0e418 LP |
1316 | ev.events = events; |
1317 | ||
acbb0225 LP |
1318 | if (epoll_ctl(u->meta.manager->epoll_fd, |
1319 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, | |
1320 | fd, | |
1321 | &ev) < 0) | |
1322 | return -errno; | |
87f0e418 | 1323 | |
acbb0225 LP |
1324 | w->fd = fd; |
1325 | w->type = WATCH_FD; | |
ea430986 | 1326 | w->data.unit = u; |
87f0e418 | 1327 | |
acbb0225 | 1328 | return 0; |
87f0e418 LP |
1329 | } |
1330 | ||
acbb0225 | 1331 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1332 | assert(u); |
acbb0225 | 1333 | assert(w); |
87f0e418 | 1334 | |
acbb0225 LP |
1335 | if (w->type == WATCH_INVALID) |
1336 | return; | |
1337 | ||
ea430986 LP |
1338 | assert(w->type == WATCH_FD); |
1339 | assert(w->data.unit == u); | |
acbb0225 LP |
1340 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
1341 | ||
1342 | w->fd = -1; | |
1343 | w->type = WATCH_INVALID; | |
ea430986 | 1344 | w->data.unit = NULL; |
87f0e418 LP |
1345 | } |
1346 | ||
1347 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1348 | assert(u); | |
1349 | assert(pid >= 1); | |
1350 | ||
05e343b7 LP |
1351 | /* Watch a specific PID. We only support one unit watching |
1352 | * each PID for now. */ | |
1353 | ||
c6c18be3 | 1354 | return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1355 | } |
1356 | ||
1357 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1358 | assert(u); | |
1359 | assert(pid >= 1); | |
1360 | ||
c6c18be3 | 1361 | hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1362 | } |
1363 | ||
acbb0225 | 1364 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1365 | struct itimerspec its; |
acbb0225 | 1366 | int flags, fd; |
87f0e418 LP |
1367 | bool ours; |
1368 | ||
1369 | assert(u); | |
acbb0225 | 1370 | assert(w); |
faf919f1 | 1371 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1372 | |
1373 | /* This will try to reuse the old timer if there is one */ | |
1374 | ||
faf919f1 LP |
1375 | if (w->type == WATCH_UNIT_TIMER) { |
1376 | assert(w->data.unit == u); | |
1377 | assert(w->fd >= 0); | |
1378 | ||
87f0e418 | 1379 | ours = false; |
acbb0225 | 1380 | fd = w->fd; |
faf919f1 LP |
1381 | } else if (w->type == WATCH_INVALID) { |
1382 | ||
87f0e418 | 1383 | ours = true; |
87f0e418 LP |
1384 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1385 | return -errno; | |
faf919f1 LP |
1386 | } else |
1387 | assert_not_reached("Invalid watch type"); | |
87f0e418 LP |
1388 | |
1389 | zero(its); | |
1390 | ||
1391 | if (delay <= 0) { | |
1392 | /* Set absolute time in the past, but not 0, since we | |
1393 | * don't want to disarm the timer */ | |
1394 | its.it_value.tv_sec = 0; | |
1395 | its.it_value.tv_nsec = 1; | |
1396 | ||
1397 | flags = TFD_TIMER_ABSTIME; | |
1398 | } else { | |
1399 | timespec_store(&its.it_value, delay); | |
1400 | flags = 0; | |
1401 | } | |
1402 | ||
1403 | /* This will also flush the elapse counter */ | |
1404 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1405 | goto fail; | |
1406 | ||
acbb0225 LP |
1407 | if (w->type == WATCH_INVALID) { |
1408 | struct epoll_event ev; | |
87f0e418 | 1409 | |
acbb0225 LP |
1410 | zero(ev); |
1411 | ev.data.ptr = w; | |
f94ea366 | 1412 | ev.events = EPOLLIN; |
acbb0225 LP |
1413 | |
1414 | if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) | |
1415 | goto fail; | |
1416 | } | |
1417 | ||
faf919f1 | 1418 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1419 | w->fd = fd; |
ea430986 | 1420 | w->data.unit = u; |
87f0e418 | 1421 | |
87f0e418 LP |
1422 | return 0; |
1423 | ||
1424 | fail: | |
1425 | if (ours) | |
ea430986 | 1426 | close_nointr_nofail(fd); |
87f0e418 LP |
1427 | |
1428 | return -errno; | |
1429 | } | |
1430 | ||
acbb0225 | 1431 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1432 | assert(u); |
acbb0225 | 1433 | assert(w); |
87f0e418 | 1434 | |
acbb0225 | 1435 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1436 | return; |
1437 | ||
faf919f1 LP |
1438 | assert(w->type == WATCH_UNIT_TIMER); |
1439 | assert(w->data.unit == u); | |
1440 | assert(w->fd >= 0); | |
acbb0225 LP |
1441 | |
1442 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
a16e1123 | 1443 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1444 | |
1445 | w->fd = -1; | |
1446 | w->type = WATCH_INVALID; | |
ea430986 | 1447 | w->data.unit = NULL; |
87f0e418 LP |
1448 | } |
1449 | ||
1450 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1451 | assert(u); | |
1452 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1453 | ||
1454 | switch (j) { | |
1455 | ||
1456 | case JOB_VERIFY_ACTIVE: | |
1457 | case JOB_START: | |
57339f47 | 1458 | case JOB_STOP: |
87f0e418 LP |
1459 | return true; |
1460 | ||
87f0e418 LP |
1461 | case JOB_RESTART: |
1462 | case JOB_TRY_RESTART: | |
1463 | return unit_can_start(u); | |
1464 | ||
1465 | case JOB_RELOAD: | |
1466 | return unit_can_reload(u); | |
1467 | ||
1468 | case JOB_RELOAD_OR_START: | |
1469 | return unit_can_reload(u) && unit_can_start(u); | |
1470 | ||
1471 | default: | |
1472 | assert_not_reached("Invalid job type"); | |
1473 | } | |
1474 | } | |
1475 | ||
701cc384 | 1476 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1477 | |
1478 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1479 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1480 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1481 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1482 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1483 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
b81884e7 | 1484 | [UNIT_BIND_TO] = UNIT_BOUND_BY, |
87f0e418 | 1485 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1486 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1487 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
b81884e7 | 1488 | [UNIT_BOUND_BY] = UNIT_BIND_TO, |
69dd2852 LP |
1489 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1490 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1491 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1492 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1493 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 LP |
1494 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
1495 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES | |
87f0e418 | 1496 | }; |
701cc384 | 1497 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1498 | |
1499 | assert(u); | |
1500 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1501 | assert(other); |
1502 | ||
9f151f29 LP |
1503 | u = unit_follow_merge(u); |
1504 | other = unit_follow_merge(other); | |
1505 | ||
87f0e418 LP |
1506 | /* We won't allow dependencies on ourselves. We will not |
1507 | * consider them an error however. */ | |
1508 | if (u == other) | |
1509 | return 0; | |
1510 | ||
5de9682c | 1511 | if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1512 | return r; |
1513 | ||
5de9682c LP |
1514 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
1515 | if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) | |
1516 | return r; | |
1517 | ||
701cc384 LP |
1518 | if (add_reference) |
1519 | if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || | |
1520 | (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
1521 | return r; | |
87f0e418 | 1522 | |
701cc384 LP |
1523 | if ((q = set_put(u->meta.dependencies[d], other)) < 0) |
1524 | return q; | |
87f0e418 | 1525 | |
5de9682c LP |
1526 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
1527 | if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) { | |
1528 | r = v; | |
1529 | goto fail; | |
1530 | } | |
701cc384 LP |
1531 | |
1532 | if (add_reference) { | |
1533 | if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) { | |
1534 | r = w; | |
1535 | goto fail; | |
1536 | } | |
1537 | ||
1538 | if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0) | |
1539 | goto fail; | |
87f0e418 LP |
1540 | } |
1541 | ||
c1e1601e | 1542 | unit_add_to_dbus_queue(u); |
87f0e418 | 1543 | return 0; |
701cc384 LP |
1544 | |
1545 | fail: | |
1546 | if (q > 0) | |
1547 | set_remove(u->meta.dependencies[d], other); | |
1548 | ||
1549 | if (v > 0) | |
1550 | set_remove(other->meta.dependencies[inverse_table[d]], u); | |
1551 | ||
1552 | if (w > 0) | |
1553 | set_remove(u->meta.dependencies[UNIT_REFERENCES], other); | |
1554 | ||
1555 | return r; | |
87f0e418 | 1556 | } |
0301abf4 | 1557 | |
2c966c03 LP |
1558 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1559 | int r; | |
1560 | ||
1561 | assert(u); | |
1562 | ||
1563 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1564 | return r; | |
1565 | ||
1566 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1567 | return r; | |
1568 | ||
1569 | return 0; | |
1570 | } | |
1571 | ||
9e2f7c11 LP |
1572 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1573 | char *s; | |
1574 | ||
1575 | assert(u); | |
1576 | assert(name || path); | |
1577 | ||
1578 | if (!name) | |
1579 | name = file_name_from_path(path); | |
1580 | ||
1581 | if (!unit_name_is_template(name)) { | |
1582 | *p = NULL; | |
1583 | return name; | |
1584 | } | |
1585 | ||
1586 | if (u->meta.instance) | |
1587 | s = unit_name_replace_instance(name, u->meta.instance); | |
1588 | else { | |
1589 | char *i; | |
1590 | ||
1591 | if (!(i = unit_name_to_prefix(u->meta.id))) | |
1592 | return NULL; | |
1593 | ||
1594 | s = unit_name_replace_instance(name, i); | |
1595 | free(i); | |
1596 | } | |
1597 | ||
1598 | if (!s) | |
1599 | return NULL; | |
1600 | ||
1601 | *p = s; | |
1602 | return s; | |
1603 | } | |
1604 | ||
701cc384 | 1605 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1606 | Unit *other; |
1607 | int r; | |
9e2f7c11 | 1608 | char *s; |
09b6b09f | 1609 | |
9e2f7c11 LP |
1610 | assert(u); |
1611 | assert(name || path); | |
09b6b09f | 1612 | |
9e2f7c11 LP |
1613 | if (!(name = resolve_template(u, name, path, &s))) |
1614 | return -ENOMEM; | |
09b6b09f | 1615 | |
398ef8ba | 1616 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1617 | goto finish; |
1618 | ||
701cc384 | 1619 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1620 | |
1621 | finish: | |
1622 | free(s); | |
1623 | return r; | |
09b6b09f LP |
1624 | } |
1625 | ||
2c966c03 LP |
1626 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1627 | Unit *other; | |
1628 | int r; | |
1629 | char *s; | |
1630 | ||
1631 | assert(u); | |
1632 | assert(name || path); | |
1633 | ||
1634 | if (!(name = resolve_template(u, name, path, &s))) | |
1635 | return -ENOMEM; | |
1636 | ||
398ef8ba | 1637 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1638 | goto finish; |
1639 | ||
1640 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1641 | ||
1642 | finish: | |
1643 | free(s); | |
1644 | return r; | |
1645 | } | |
1646 | ||
701cc384 | 1647 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1648 | Unit *other; |
1649 | int r; | |
9e2f7c11 | 1650 | char *s; |
bd77d0fc | 1651 | |
9e2f7c11 LP |
1652 | assert(u); |
1653 | assert(name || path); | |
bd77d0fc | 1654 | |
9e2f7c11 LP |
1655 | if (!(name = resolve_template(u, name, path, &s))) |
1656 | return -ENOMEM; | |
bd77d0fc | 1657 | |
398ef8ba | 1658 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1659 | goto finish; |
1660 | ||
701cc384 | 1661 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1662 | |
1663 | finish: | |
1664 | free(s); | |
1665 | return r; | |
bd77d0fc LP |
1666 | } |
1667 | ||
2c966c03 LP |
1668 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1669 | Unit *other; | |
1670 | int r; | |
1671 | char *s; | |
1672 | ||
1673 | assert(u); | |
1674 | assert(name || path); | |
1675 | ||
1676 | if (!(name = resolve_template(u, name, path, &s))) | |
1677 | return -ENOMEM; | |
1678 | ||
398ef8ba | 1679 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1680 | goto finish; |
1681 | ||
1682 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1683 | goto finish; | |
1684 | ||
1685 | finish: | |
1686 | free(s); | |
1687 | return r; | |
1688 | } | |
1689 | ||
0301abf4 LP |
1690 | int set_unit_path(const char *p) { |
1691 | char *cwd, *c; | |
1692 | int r; | |
1693 | ||
1694 | /* This is mostly for debug purposes */ | |
1695 | ||
1696 | if (path_is_absolute(p)) { | |
1697 | if (!(c = strdup(p))) | |
1698 | return -ENOMEM; | |
1699 | } else { | |
1700 | if (!(cwd = get_current_dir_name())) | |
1701 | return -errno; | |
1702 | ||
1703 | r = asprintf(&c, "%s/%s", cwd, p); | |
1704 | free(cwd); | |
1705 | ||
1706 | if (r < 0) | |
1707 | return -ENOMEM; | |
1708 | } | |
1709 | ||
036643a2 | 1710 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1711 | r = -errno; |
1712 | free(c); | |
1713 | return r; | |
1714 | } | |
1715 | ||
1716 | return 0; | |
1717 | } | |
88066b3a | 1718 | |
ea430986 LP |
1719 | char *unit_dbus_path(Unit *u) { |
1720 | char *p, *e; | |
1721 | ||
1722 | assert(u); | |
1723 | ||
04ade7d2 LP |
1724 | if (!u->meta.id) |
1725 | return NULL; | |
1726 | ||
9e2f7c11 | 1727 | if (!(e = bus_path_escape(u->meta.id))) |
ea430986 LP |
1728 | return NULL; |
1729 | ||
35d2e7ec | 1730 | p = strappend("/org/freedesktop/systemd1/unit/", e); |
ea430986 | 1731 | free(e); |
35d2e7ec | 1732 | |
ea430986 LP |
1733 | return p; |
1734 | } | |
1735 | ||
8e274523 | 1736 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
8e274523 LP |
1737 | int r; |
1738 | ||
1739 | assert(u); | |
1740 | assert(b); | |
35d2e7ec | 1741 | |
8e274523 LP |
1742 | assert(b->path); |
1743 | ||
35d2e7ec LP |
1744 | if (!b->controller) |
1745 | if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) | |
1746 | return -ENOMEM; | |
1747 | ||
8e274523 LP |
1748 | /* Ensure this hasn't been added yet */ |
1749 | assert(!b->unit); | |
1750 | ||
d686d8a9 LP |
1751 | if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
1752 | CGroupBonding *l; | |
8e274523 | 1753 | |
d686d8a9 LP |
1754 | l = hashmap_get(u->meta.manager->cgroup_bondings, b->path); |
1755 | LIST_PREPEND(CGroupBonding, by_path, l, b); | |
1756 | ||
1757 | if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) { | |
1758 | LIST_REMOVE(CGroupBonding, by_path, l, b); | |
1759 | return r; | |
1760 | } | |
8e274523 LP |
1761 | } |
1762 | ||
1763 | LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b); | |
1764 | b->unit = u; | |
1765 | ||
1766 | return 0; | |
1767 | } | |
1768 | ||
013b87c0 LP |
1769 | static char *default_cgroup_path(Unit *u) { |
1770 | char *p; | |
4f2d528d | 1771 | int r; |
013b87c0 LP |
1772 | |
1773 | assert(u); | |
1774 | ||
4f2d528d LP |
1775 | if (u->meta.instance) { |
1776 | char *t; | |
013b87c0 | 1777 | |
4f2d528d LP |
1778 | if (!(t = unit_name_template(u->meta.id))) |
1779 | return NULL; | |
1780 | ||
1781 | r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance); | |
1782 | free(t); | |
1783 | } else | |
1784 | r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id); | |
1785 | ||
1786 | return r < 0 ? NULL : p; | |
013b87c0 LP |
1787 | } |
1788 | ||
8e274523 | 1789 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
013b87c0 LP |
1790 | char *controller = NULL, *path = NULL; |
1791 | CGroupBonding *b = NULL; | |
8e274523 LP |
1792 | int r; |
1793 | ||
1794 | assert(u); | |
1795 | assert(name); | |
1796 | ||
35d2e7ec LP |
1797 | if ((r = cg_split_spec(name, &controller, &path)) < 0) |
1798 | return r; | |
8e274523 | 1799 | |
35d2e7ec LP |
1800 | if (!path) |
1801 | path = default_cgroup_path(u); | |
013b87c0 | 1802 | |
35d2e7ec | 1803 | if (!controller) |
55096547 | 1804 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
013b87c0 | 1805 | |
35d2e7ec LP |
1806 | if (!path || !controller) { |
1807 | free(path); | |
1808 | free(controller); | |
1809 | ||
1810 | return -ENOMEM; | |
8e274523 LP |
1811 | } |
1812 | ||
013b87c0 LP |
1813 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) { |
1814 | r = -EEXIST; | |
1815 | goto fail; | |
1816 | } | |
8e274523 | 1817 | |
013b87c0 | 1818 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1819 | r = -ENOMEM; |
1820 | goto fail; | |
1821 | } | |
1822 | ||
013b87c0 LP |
1823 | b->controller = controller; |
1824 | b->path = path; | |
d686d8a9 | 1825 | b->ours = false; |
8e274523 LP |
1826 | |
1827 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1828 | goto fail; | |
1829 | ||
1830 | return 0; | |
1831 | ||
1832 | fail: | |
013b87c0 LP |
1833 | free(path); |
1834 | free(controller); | |
8e274523 LP |
1835 | free(b); |
1836 | ||
1837 | return r; | |
1838 | } | |
1839 | ||
06d4c99a | 1840 | static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
d686d8a9 | 1841 | CGroupBonding *b = NULL; |
8e274523 LP |
1842 | int r = -ENOMEM; |
1843 | ||
1844 | assert(u); | |
1845 | ||
06d4c99a LP |
1846 | if (!controller) |
1847 | controller = SYSTEMD_CGROUP_CONTROLLER; | |
8e274523 | 1848 | |
06d4c99a LP |
1849 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) |
1850 | return 0; | |
8e274523 | 1851 | |
06d4c99a LP |
1852 | if (!(b = new0(CGroupBonding, 1))) |
1853 | return -ENOMEM; | |
8e274523 | 1854 | |
06d4c99a LP |
1855 | if (!(b->controller = strdup(controller))) |
1856 | goto fail; | |
d686d8a9 | 1857 | |
06d4c99a LP |
1858 | if (!(b->path = default_cgroup_path(u))) |
1859 | goto fail; | |
d686d8a9 | 1860 | |
06d4c99a LP |
1861 | b->ours = true; |
1862 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
d686d8a9 | 1863 | |
06d4c99a LP |
1864 | if ((r = unit_add_cgroup(u, b)) < 0) |
1865 | goto fail; | |
8e274523 LP |
1866 | |
1867 | return 0; | |
1868 | ||
1869 | fail: | |
06d4c99a LP |
1870 | free(b->path); |
1871 | free(b->controller); | |
1872 | free(b); | |
8e274523 LP |
1873 | |
1874 | return r; | |
1875 | } | |
1876 | ||
06d4c99a LP |
1877 | int unit_add_default_cgroups(Unit *u) { |
1878 | char **c; | |
1879 | int r; | |
1880 | assert(u); | |
1881 | ||
1882 | /* Adds in the default cgroups, if they weren't specified | |
1883 | * otherwise. */ | |
1884 | ||
df18d8c8 LP |
1885 | if (!u->meta.manager->cgroup_hierarchy) |
1886 | return 0; | |
1887 | ||
06d4c99a LP |
1888 | if ((r = unit_add_one_default_cgroup(u, NULL)) < 0) |
1889 | return r; | |
1890 | ||
1891 | STRV_FOREACH(c, u->meta.manager->default_controllers) | |
1892 | if ((r = unit_add_one_default_cgroup(u, *c)) < 0) | |
1893 | return r; | |
1894 | ||
1895 | return 0; | |
1896 | } | |
1897 | ||
8e274523 LP |
1898 | CGroupBonding* unit_get_default_cgroup(Unit *u) { |
1899 | assert(u); | |
1900 | ||
55096547 | 1901 | return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); |
8e274523 LP |
1902 | } |
1903 | ||
f6ff8c29 LP |
1904 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
1905 | char *t; | |
1906 | int r; | |
1907 | ||
1908 | assert(u); | |
1909 | assert(type); | |
1910 | assert(_found); | |
1911 | ||
9e2f7c11 | 1912 | if (!(t = unit_name_change_suffix(u->meta.id, type))) |
f6ff8c29 LP |
1913 | return -ENOMEM; |
1914 | ||
1915 | assert(!unit_has_name(u, t)); | |
1916 | ||
398ef8ba | 1917 | r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
1918 | free(t); |
1919 | ||
9e2f7c11 | 1920 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
1921 | |
1922 | return r; | |
1923 | } | |
1924 | ||
a16e1123 LP |
1925 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
1926 | Unit *found; | |
1927 | char *t; | |
1928 | ||
1929 | assert(u); | |
1930 | assert(type); | |
1931 | assert(_found); | |
1932 | ||
1933 | if (!(t = unit_name_change_suffix(u->meta.id, type))) | |
1934 | return -ENOMEM; | |
1935 | ||
1936 | assert(!unit_has_name(u, t)); | |
1937 | ||
1938 | found = manager_get_unit(u->meta.manager, t); | |
1939 | free(t); | |
1940 | ||
1941 | if (!found) | |
1942 | return -ENOENT; | |
1943 | ||
1944 | *_found = found; | |
1945 | return 0; | |
1946 | } | |
1947 | ||
9e2f7c11 LP |
1948 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
1949 | Unit *u = userdata; | |
1950 | assert(u); | |
1951 | ||
1952 | return unit_name_to_prefix_and_instance(u->meta.id); | |
1953 | } | |
1954 | ||
1955 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
1956 | Unit *u = userdata; | |
1957 | assert(u); | |
1958 | ||
1959 | return unit_name_to_prefix(u->meta.id); | |
1960 | } | |
1961 | ||
1962 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
1963 | Unit *u = userdata; | |
1964 | char *p, *r; | |
1965 | ||
1966 | assert(u); | |
1967 | ||
1968 | if (!(p = unit_name_to_prefix(u->meta.id))) | |
1969 | return NULL; | |
1970 | ||
1971 | r = unit_name_unescape(p); | |
1972 | free(p); | |
1973 | ||
1974 | return r; | |
1975 | } | |
1976 | ||
1977 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
1978 | Unit *u = userdata; | |
1979 | assert(u); | |
1980 | ||
1981 | if (u->meta.instance) | |
1982 | return unit_name_unescape(u->meta.instance); | |
1983 | ||
1984 | return strdup(""); | |
1985 | } | |
1986 | ||
9fc50704 LP |
1987 | static char *specifier_filename(char specifier, void *data, void *userdata) { |
1988 | Unit *u = userdata; | |
1989 | assert(u); | |
1990 | ||
1991 | if (u->meta.instance) | |
1992 | return unit_name_path_unescape(u->meta.instance); | |
1993 | ||
1994 | return unit_name_to_path(u->meta.instance); | |
1995 | } | |
1996 | ||
9e2f7c11 LP |
1997 | char *unit_name_printf(Unit *u, const char* format) { |
1998 | ||
1999 | /* | |
2000 | * This will use the passed string as format string and | |
2001 | * replace the following specifiers: | |
2002 | * | |
2003 | * %n: the full id of the unit (foo@bar.waldo) | |
2004 | * %N: the id of the unit without the suffix (foo@bar) | |
2005 | * %p: the prefix (foo) | |
2006 | * %i: the instance (bar) | |
2007 | */ | |
2008 | ||
2009 | const Specifier table[] = { | |
2010 | { 'n', specifier_string, u->meta.id }, | |
2011 | { 'N', specifier_prefix_and_instance, NULL }, | |
2012 | { 'p', specifier_prefix, NULL }, | |
2013 | { 'i', specifier_string, u->meta.instance }, | |
2014 | { 0, NULL, NULL } | |
2015 | }; | |
2016 | ||
2017 | assert(u); | |
2018 | assert(format); | |
2019 | ||
2020 | return specifier_printf(format, table, u); | |
2021 | } | |
2022 | ||
2023 | char *unit_full_printf(Unit *u, const char *format) { | |
2024 | ||
2025 | /* This is similar to unit_name_printf() but also supports | |
2026 | * unescaping */ | |
2027 | ||
2028 | const Specifier table[] = { | |
2029 | { 'n', specifier_string, u->meta.id }, | |
2030 | { 'N', specifier_prefix_and_instance, NULL }, | |
2031 | { 'p', specifier_prefix, NULL }, | |
2032 | { 'P', specifier_prefix_unescaped, NULL }, | |
2033 | { 'i', specifier_string, u->meta.instance }, | |
2034 | { 'I', specifier_instance_unescaped, NULL }, | |
9fc50704 | 2035 | { 'f', specifier_filename, NULL }, |
9e2f7c11 LP |
2036 | { 0, NULL, NULL } |
2037 | }; | |
2038 | ||
2039 | assert(u); | |
2040 | assert(format); | |
2041 | ||
2042 | return specifier_printf(format, table, u); | |
2043 | } | |
2044 | ||
2045 | char **unit_full_printf_strv(Unit *u, char **l) { | |
2046 | size_t n; | |
2047 | char **r, **i, **j; | |
2048 | ||
2049 | /* Applies unit_full_printf to every entry in l */ | |
2050 | ||
2051 | assert(u); | |
2052 | ||
2053 | n = strv_length(l); | |
2054 | if (!(r = new(char*, n+1))) | |
2055 | return NULL; | |
2056 | ||
2057 | for (i = l, j = r; *i; i++, j++) | |
2058 | if (!(*j = unit_full_printf(u, *i))) | |
2059 | goto fail; | |
2060 | ||
2061 | *j = NULL; | |
2062 | return r; | |
2063 | ||
2064 | fail: | |
da19d5c1 | 2065 | for (j--; j >= r; j--) |
9e2f7c11 LP |
2066 | free(*j); |
2067 | ||
2068 | free(r); | |
2069 | ||
2070 | return NULL; | |
2071 | } | |
2072 | ||
05e343b7 LP |
2073 | int unit_watch_bus_name(Unit *u, const char *name) { |
2074 | assert(u); | |
2075 | assert(name); | |
2076 | ||
2077 | /* Watch a specific name on the bus. We only support one unit | |
2078 | * watching each name for now. */ | |
2079 | ||
2080 | return hashmap_put(u->meta.manager->watch_bus, name, u); | |
2081 | } | |
2082 | ||
2083 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2084 | assert(u); | |
2085 | assert(name); | |
2086 | ||
2087 | hashmap_remove_value(u->meta.manager->watch_bus, name, u); | |
2088 | } | |
2089 | ||
a16e1123 LP |
2090 | bool unit_can_serialize(Unit *u) { |
2091 | assert(u); | |
2092 | ||
2093 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2094 | } | |
2095 | ||
2096 | int unit_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2097 | int r; | |
2098 | ||
2099 | assert(u); | |
2100 | assert(f); | |
2101 | assert(fds); | |
2102 | ||
2103 | if (!unit_can_serialize(u)) | |
2104 | return 0; | |
2105 | ||
2106 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
2107 | return r; | |
2108 | ||
cca098b0 LP |
2109 | if (u->meta.job) |
2110 | unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type)); | |
2111 | ||
10717a1a LP |
2112 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->meta.inactive_exit_timestamp); |
2113 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->meta.active_enter_timestamp); | |
2114 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->meta.active_exit_timestamp); | |
2115 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->meta.inactive_enter_timestamp); | |
2791a8f8 LP |
2116 | dual_timestamp_serialize(f, "condition-timestamp", &u->meta.condition_timestamp); |
2117 | ||
2118 | if (dual_timestamp_is_set(&u->meta.condition_timestamp)) | |
2119 | unit_serialize_item(u, f, "condition-result", yes_no(u->meta.condition_result)); | |
10717a1a | 2120 | |
a16e1123 LP |
2121 | /* End marker */ |
2122 | fputc('\n', f); | |
2123 | return 0; | |
2124 | } | |
2125 | ||
2126 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2127 | va_list ap; | |
2128 | ||
2129 | assert(u); | |
2130 | assert(f); | |
2131 | assert(key); | |
2132 | assert(format); | |
2133 | ||
2134 | fputs(key, f); | |
2135 | fputc('=', f); | |
2136 | ||
2137 | va_start(ap, format); | |
2138 | vfprintf(f, format, ap); | |
2139 | va_end(ap); | |
2140 | ||
2141 | fputc('\n', f); | |
2142 | } | |
2143 | ||
2144 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2145 | assert(u); | |
2146 | assert(f); | |
2147 | assert(key); | |
2148 | assert(value); | |
2149 | ||
2150 | fprintf(f, "%s=%s\n", key, value); | |
2151 | } | |
2152 | ||
2153 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2154 | int r; | |
2155 | ||
2156 | assert(u); | |
2157 | assert(f); | |
2158 | assert(fds); | |
2159 | ||
2160 | if (!unit_can_serialize(u)) | |
2161 | return 0; | |
2162 | ||
2163 | for (;;) { | |
20c03b7b | 2164 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2165 | size_t k; |
2166 | ||
2167 | if (!fgets(line, sizeof(line), f)) { | |
2168 | if (feof(f)) | |
2169 | return 0; | |
2170 | return -errno; | |
2171 | } | |
2172 | ||
10f8e83c | 2173 | char_array_0(line); |
a16e1123 LP |
2174 | l = strstrip(line); |
2175 | ||
2176 | /* End marker */ | |
2177 | if (l[0] == 0) | |
2178 | return 0; | |
2179 | ||
2180 | k = strcspn(l, "="); | |
2181 | ||
2182 | if (l[k] == '=') { | |
2183 | l[k] = 0; | |
2184 | v = l+k+1; | |
2185 | } else | |
2186 | v = l+k; | |
2187 | ||
cca098b0 LP |
2188 | if (streq(l, "job")) { |
2189 | JobType type; | |
2190 | ||
2191 | if ((type = job_type_from_string(v)) < 0) | |
2192 | log_debug("Failed to parse job type value %s", v); | |
2193 | else | |
2194 | u->meta.deserialized_job = type; | |
2195 | ||
2196 | continue; | |
8aaf019b | 2197 | } else if (streq(l, "inactive-exit-timestamp")) { |
799fd0fd | 2198 | dual_timestamp_deserialize(v, &u->meta.inactive_exit_timestamp); |
8aaf019b LP |
2199 | continue; |
2200 | } else if (streq(l, "active-enter-timestamp")) { | |
799fd0fd | 2201 | dual_timestamp_deserialize(v, &u->meta.active_enter_timestamp); |
8aaf019b LP |
2202 | continue; |
2203 | } else if (streq(l, "active-exit-timestamp")) { | |
799fd0fd | 2204 | dual_timestamp_deserialize(v, &u->meta.active_exit_timestamp); |
8aaf019b LP |
2205 | continue; |
2206 | } else if (streq(l, "inactive-enter-timestamp")) { | |
799fd0fd | 2207 | dual_timestamp_deserialize(v, &u->meta.inactive_enter_timestamp); |
8aaf019b | 2208 | continue; |
2791a8f8 LP |
2209 | } else if (streq(l, "condition-timestamp")) { |
2210 | dual_timestamp_deserialize(v, &u->meta.condition_timestamp); | |
2211 | continue; | |
2212 | } else if (streq(l, "condition-result")) { | |
2213 | int b; | |
2214 | ||
2215 | if ((b = parse_boolean(v)) < 0) | |
2216 | log_debug("Failed to parse condition result value %s", v); | |
2217 | else | |
2218 | u->meta.condition_result = b; | |
efbac6d2 LP |
2219 | |
2220 | continue; | |
8aaf019b | 2221 | } |
cca098b0 | 2222 | |
a16e1123 LP |
2223 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
2224 | return r; | |
2225 | } | |
2226 | } | |
2227 | ||
6e2ef85b LP |
2228 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2229 | Unit *device; | |
2230 | char *e; | |
2231 | int r; | |
2232 | ||
2233 | assert(u); | |
2234 | ||
2235 | if (!what) | |
2236 | return 0; | |
2237 | ||
2238 | /* Adds in links to the device node that this unit is based on */ | |
2239 | ||
8407a5d0 | 2240 | if (!is_device_path(what)) |
6e2ef85b LP |
2241 | return 0; |
2242 | ||
2243 | if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) | |
2244 | return -ENOMEM; | |
2245 | ||
398ef8ba | 2246 | r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2247 | free(e); |
2248 | ||
2249 | if (r < 0) | |
2250 | return r; | |
2251 | ||
b81884e7 | 2252 | if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BIND_TO, device, true)) < 0) |
6e2ef85b LP |
2253 | return r; |
2254 | ||
2255 | if (wants) | |
2256 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
2257 | return r; | |
2258 | ||
2259 | return 0; | |
2260 | } | |
a16e1123 | 2261 | |
cca098b0 LP |
2262 | int unit_coldplug(Unit *u) { |
2263 | int r; | |
2264 | ||
2265 | assert(u); | |
2266 | ||
2267 | if (UNIT_VTABLE(u)->coldplug) | |
2268 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2269 | return r; | |
2270 | ||
2271 | if (u->meta.deserialized_job >= 0) { | |
cebe0d41 | 2272 | if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL)) < 0) |
cca098b0 LP |
2273 | return r; |
2274 | ||
2275 | u->meta.deserialized_job = _JOB_TYPE_INVALID; | |
2276 | } | |
2277 | ||
2278 | return 0; | |
2279 | } | |
2280 | ||
9e58ff9c LP |
2281 | void unit_status_printf(Unit *u, const char *format, ...) { |
2282 | va_list ap; | |
2283 | ||
2284 | assert(u); | |
2285 | assert(format); | |
2286 | ||
2287 | if (!UNIT_VTABLE(u)->show_status) | |
2288 | return; | |
2289 | ||
2290 | if (u->meta.manager->running_as != MANAGER_SYSTEM) | |
2291 | return; | |
2292 | ||
6faa1114 LP |
2293 | /* If Plymouth is running make sure we show the status, so |
2294 | * that there's something nice to see when people press Esc */ | |
2295 | ||
2296 | if (!u->meta.manager->show_status && !plymouth_running()) | |
9e58ff9c LP |
2297 | return; |
2298 | ||
2299 | if (!manager_is_booting_or_shutting_down(u->meta.manager)) | |
2300 | return; | |
2301 | ||
2302 | va_start(ap, format); | |
2303 | status_vprintf(format, ap); | |
2304 | va_end(ap); | |
2305 | } | |
2306 | ||
45fb0699 | 2307 | bool unit_need_daemon_reload(Unit *u) { |
45fb0699 LP |
2308 | assert(u); |
2309 | ||
5f4b19f4 LP |
2310 | if (u->meta.fragment_path) { |
2311 | struct stat st; | |
45fb0699 | 2312 | |
5f4b19f4 LP |
2313 | zero(st); |
2314 | if (stat(u->meta.fragment_path, &st) < 0) | |
2315 | /* What, cannot access this anymore? */ | |
2316 | return true; | |
45fb0699 | 2317 | |
5f4b19f4 LP |
2318 | if (u->meta.fragment_mtime > 0 && |
2319 | timespec_load(&st.st_mtim) != u->meta.fragment_mtime) | |
2320 | return true; | |
2321 | } | |
2322 | ||
2323 | if (UNIT_VTABLE(u)->need_daemon_reload) | |
2324 | return UNIT_VTABLE(u)->need_daemon_reload(u); | |
2325 | ||
2326 | return false; | |
45fb0699 LP |
2327 | } |
2328 | ||
fdf20a31 | 2329 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2330 | assert(u); |
2331 | ||
fdf20a31 MM |
2332 | if (UNIT_VTABLE(u)->reset_failed) |
2333 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2334 | } |
2335 | ||
a7f241db LP |
2336 | Unit *unit_following(Unit *u) { |
2337 | assert(u); | |
2338 | ||
2339 | if (UNIT_VTABLE(u)->following) | |
2340 | return UNIT_VTABLE(u)->following(u); | |
2341 | ||
2342 | return NULL; | |
2343 | } | |
2344 | ||
18ffdfda LP |
2345 | bool unit_pending_inactive(Unit *u) { |
2346 | assert(u); | |
2347 | ||
2348 | /* Returns true if the unit is inactive or going down */ | |
2349 | ||
2350 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
2351 | return true; | |
2352 | ||
2353 | if (u->meta.job && u->meta.job->type == JOB_STOP) | |
2354 | return true; | |
2355 | ||
2356 | return false; | |
2357 | } | |
2358 | ||
f976f3f6 LP |
2359 | bool unit_pending_active(Unit *u) { |
2360 | assert(u); | |
2361 | ||
2362 | /* Returns true if the unit is inactive or going down */ | |
2363 | ||
2364 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2365 | return true; | |
2366 | ||
2367 | if (u->meta.job && | |
2368 | (u->meta.job->type == JOB_START || | |
2369 | u->meta.job->type == JOB_RELOAD_OR_START || | |
2370 | u->meta.job->type == JOB_RESTART)) | |
2371 | return true; | |
2372 | ||
2373 | return false; | |
2374 | } | |
2375 | ||
71fad675 LP |
2376 | UnitType unit_name_to_type(const char *n) { |
2377 | UnitType t; | |
2378 | ||
2379 | assert(n); | |
2380 | ||
2381 | for (t = 0; t < _UNIT_TYPE_MAX; t++) | |
2382 | if (endswith(n, unit_vtable[t]->suffix)) | |
2383 | return t; | |
2384 | ||
2385 | return _UNIT_TYPE_INVALID; | |
2386 | } | |
2387 | ||
b9c0d441 | 2388 | bool unit_name_is_valid(const char *n, bool template_ok) { |
71fad675 LP |
2389 | UnitType t; |
2390 | ||
2391 | t = unit_name_to_type(n); | |
2392 | if (t < 0 || t >= _UNIT_TYPE_MAX) | |
2393 | return false; | |
2394 | ||
b9c0d441 | 2395 | return unit_name_is_valid_no_type(n, template_ok); |
71fad675 LP |
2396 | } |
2397 | ||
8a0867d6 LP |
2398 | int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error) { |
2399 | assert(u); | |
2400 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
2401 | assert(m >= 0 && m < _KILL_MODE_MAX); | |
2402 | assert(signo > 0); | |
2403 | assert(signo < _NSIG); | |
2404 | ||
2405 | if (m == KILL_NONE) | |
2406 | return 0; | |
2407 | ||
2408 | if (!UNIT_VTABLE(u)->kill) | |
2409 | return -ENOTSUP; | |
2410 | ||
2411 | return UNIT_VTABLE(u)->kill(u, w, m, signo, error); | |
2412 | } | |
2413 | ||
6210e7fc LP |
2414 | |
2415 | int unit_following_set(Unit *u, Set **s) { | |
2416 | assert(u); | |
2417 | assert(s); | |
2418 | ||
2419 | if (UNIT_VTABLE(u)->following_set) | |
2420 | return UNIT_VTABLE(u)->following_set(u, s); | |
2421 | ||
2422 | *s = NULL; | |
2423 | return 0; | |
2424 | } | |
2425 | ||
94f04347 LP |
2426 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { |
2427 | [UNIT_STUB] = "stub", | |
2428 | [UNIT_LOADED] = "loaded", | |
fdf20a31 | 2429 | [UNIT_ERROR] = "error", |
00dc5d76 | 2430 | [UNIT_MERGED] = "merged", |
6daf4f90 | 2431 | [UNIT_MASKED] = "masked" |
94f04347 LP |
2432 | }; |
2433 | ||
2434 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
2435 | ||
2436 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
2437 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2438 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2439 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2440 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2441 | [UNIT_ACTIVATING] = "activating", |
2442 | [UNIT_DEACTIVATING] = "deactivating" | |
2443 | }; | |
2444 | ||
2445 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2446 | ||
2447 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2448 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2449 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 LP |
2450 | [UNIT_WANTS] = "Wants", |
2451 | [UNIT_REQUISITE] = "Requisite", | |
9e2f7c11 | 2452 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
94f04347 | 2453 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2454 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
b81884e7 | 2455 | [UNIT_BIND_TO] = "BindTo", |
94f04347 LP |
2456 | [UNIT_WANTED_BY] = "WantedBy", |
2457 | [UNIT_CONFLICTS] = "Conflicts", | |
69dd2852 | 2458 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
b81884e7 | 2459 | [UNIT_BOUND_BY] = "BoundBy", |
94f04347 LP |
2460 | [UNIT_BEFORE] = "Before", |
2461 | [UNIT_AFTER] = "After", | |
701cc384 | 2462 | [UNIT_REFERENCES] = "References", |
5de9682c LP |
2463 | [UNIT_REFERENCED_BY] = "ReferencedBy", |
2464 | [UNIT_ON_FAILURE] = "OnFailure" | |
94f04347 LP |
2465 | }; |
2466 | ||
2467 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |