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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 | |
9e2f7c11 LP |
121 | if (i && unit_vtable[t]->no_instances) |
122 | goto fail; | |
123 | ||
276c3e78 LP |
124 | /* Ensure that this unit is either instanced or not instanced, |
125 | * but not both. */ | |
126 | if (u->meta.type != _UNIT_TYPE_INVALID && !u->meta.instance != !i) { | |
9e2f7c11 LP |
127 | r = -EINVAL; |
128 | goto fail; | |
129 | } | |
130 | ||
131 | if (unit_vtable[t]->no_alias && | |
132 | !set_isempty(u->meta.names) && | |
133 | !set_get(u->meta.names, s)) { | |
134 | r = -EEXIST; | |
135 | goto fail; | |
136 | } | |
137 | ||
4f0f902f LP |
138 | if (hashmap_size(u->meta.manager->units) >= MANAGER_MAX_NAMES) { |
139 | r = -E2BIG; | |
140 | goto fail; | |
141 | } | |
142 | ||
9e2f7c11 LP |
143 | if ((r = set_put(u->meta.names, s)) < 0) { |
144 | if (r == -EEXIST) | |
145 | r = 0; | |
146 | goto fail; | |
87f0e418 LP |
147 | } |
148 | ||
149 | if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) { | |
150 | set_remove(u->meta.names, s); | |
9e2f7c11 | 151 | goto fail; |
87f0e418 LP |
152 | } |
153 | ||
e537352b | 154 | if (u->meta.type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 155 | |
e537352b | 156 | u->meta.type = t; |
9e2f7c11 LP |
157 | u->meta.id = s; |
158 | u->meta.instance = i; | |
159 | ||
160 | LIST_PREPEND(Meta, units_per_type, u->meta.manager->units_per_type[t], &u->meta); | |
e537352b LP |
161 | |
162 | if (UNIT_VTABLE(u)->init) | |
163 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
164 | } else |
165 | free(i); | |
87f0e418 | 166 | |
c1e1601e | 167 | unit_add_to_dbus_queue(u); |
87f0e418 | 168 | return 0; |
9e2f7c11 LP |
169 | |
170 | fail: | |
171 | free(s); | |
172 | free(i); | |
173 | ||
174 | return r; | |
87f0e418 LP |
175 | } |
176 | ||
0ae97ec1 | 177 | int unit_choose_id(Unit *u, const char *name) { |
276c3e78 LP |
178 | char *s, *t = NULL, *i; |
179 | int r; | |
0ae97ec1 LP |
180 | |
181 | assert(u); | |
182 | assert(name); | |
183 | ||
9e2f7c11 LP |
184 | if (unit_name_is_template(name)) { |
185 | ||
186 | if (!u->meta.instance) | |
187 | return -EINVAL; | |
188 | ||
189 | if (!(t = unit_name_replace_instance(name, u->meta.instance))) | |
190 | return -ENOMEM; | |
191 | ||
192 | name = t; | |
193 | } | |
194 | ||
0ae97ec1 | 195 | /* Selects one of the names of this unit as the id */ |
9e2f7c11 LP |
196 | s = set_get(u->meta.names, (char*) name); |
197 | free(t); | |
0ae97ec1 | 198 | |
9e2f7c11 | 199 | if (!s) |
0ae97ec1 LP |
200 | return -ENOENT; |
201 | ||
276c3e78 LP |
202 | if ((r = unit_name_to_instance(s, &i)) < 0) |
203 | return r; | |
204 | ||
0ae97ec1 | 205 | u->meta.id = s; |
276c3e78 LP |
206 | |
207 | free(u->meta.instance); | |
208 | u->meta.instance = i; | |
209 | ||
c1e1601e | 210 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 211 | |
0ae97ec1 LP |
212 | return 0; |
213 | } | |
214 | ||
f50e0a01 LP |
215 | int unit_set_description(Unit *u, const char *description) { |
216 | char *s; | |
217 | ||
218 | assert(u); | |
219 | ||
220 | if (!(s = strdup(description))) | |
221 | return -ENOMEM; | |
222 | ||
223 | free(u->meta.description); | |
224 | u->meta.description = s; | |
c1e1601e LP |
225 | |
226 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
227 | return 0; |
228 | } | |
229 | ||
701cc384 LP |
230 | bool unit_check_gc(Unit *u) { |
231 | assert(u); | |
232 | ||
b86d44e5 LP |
233 | if (u->meta.load_state == UNIT_STUB) |
234 | return true; | |
235 | ||
701cc384 LP |
236 | if (UNIT_VTABLE(u)->no_gc) |
237 | return true; | |
238 | ||
6c073082 LP |
239 | if (u->meta.no_gc) |
240 | return true; | |
241 | ||
701cc384 LP |
242 | if (u->meta.job) |
243 | return true; | |
244 | ||
245 | if (unit_active_state(u) != UNIT_INACTIVE) | |
246 | return true; | |
247 | ||
248 | if (UNIT_VTABLE(u)->check_gc) | |
249 | if (UNIT_VTABLE(u)->check_gc(u)) | |
250 | return true; | |
251 | ||
252 | return false; | |
253 | } | |
254 | ||
87f0e418 LP |
255 | void unit_add_to_load_queue(Unit *u) { |
256 | assert(u); | |
819e213f | 257 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 LP |
258 | |
259 | if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue) | |
260 | return; | |
261 | ||
262 | LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
263 | u->meta.in_load_queue = true; | |
264 | } | |
265 | ||
23a177ef LP |
266 | void unit_add_to_cleanup_queue(Unit *u) { |
267 | assert(u); | |
268 | ||
269 | if (u->meta.in_cleanup_queue) | |
270 | return; | |
271 | ||
272 | LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
273 | u->meta.in_cleanup_queue = true; | |
274 | } | |
275 | ||
701cc384 LP |
276 | void unit_add_to_gc_queue(Unit *u) { |
277 | assert(u); | |
278 | ||
279 | if (u->meta.in_gc_queue || u->meta.in_cleanup_queue) | |
280 | return; | |
281 | ||
282 | if (unit_check_gc(u)) | |
283 | return; | |
284 | ||
285 | LIST_PREPEND(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
286 | u->meta.in_gc_queue = true; | |
287 | ||
288 | u->meta.manager->n_in_gc_queue ++; | |
289 | ||
290 | if (u->meta.manager->gc_queue_timestamp <= 0) | |
291 | u->meta.manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
292 | } | |
293 | ||
c1e1601e LP |
294 | void unit_add_to_dbus_queue(Unit *u) { |
295 | assert(u); | |
819e213f | 296 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
c1e1601e | 297 | |
94b6dfa2 | 298 | if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue) |
c1e1601e LP |
299 | return; |
300 | ||
a567261a LP |
301 | /* Shortcut things if nobody cares */ |
302 | if (!bus_has_subscriber(u->meta.manager)) { | |
94b6dfa2 LP |
303 | u->meta.sent_dbus_new_signal = true; |
304 | return; | |
305 | } | |
306 | ||
c1e1601e LP |
307 | LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); |
308 | u->meta.in_dbus_queue = true; | |
309 | } | |
310 | ||
87f0e418 LP |
311 | static void bidi_set_free(Unit *u, Set *s) { |
312 | Iterator i; | |
313 | Unit *other; | |
314 | ||
315 | assert(u); | |
316 | ||
317 | /* Frees the set and makes sure we are dropped from the | |
318 | * inverse pointers */ | |
319 | ||
320 | SET_FOREACH(other, s, i) { | |
321 | UnitDependency d; | |
322 | ||
323 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
324 | set_remove(other->meta.dependencies[d], u); | |
701cc384 LP |
325 | |
326 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
327 | } |
328 | ||
329 | set_free(s); | |
330 | } | |
331 | ||
332 | void unit_free(Unit *u) { | |
333 | UnitDependency d; | |
334 | Iterator i; | |
335 | char *t; | |
336 | ||
337 | assert(u); | |
338 | ||
c1e1601e LP |
339 | bus_unit_send_removed_signal(u); |
340 | ||
a013b84b LP |
341 | if (u->meta.load_state != UNIT_STUB) |
342 | if (UNIT_VTABLE(u)->done) | |
343 | UNIT_VTABLE(u)->done(u); | |
344 | ||
87f0e418 LP |
345 | SET_FOREACH(t, u->meta.names, i) |
346 | hashmap_remove_value(u->meta.manager->units, t, u); | |
347 | ||
964e0949 LP |
348 | if (u->meta.job) |
349 | job_free(u->meta.job); | |
350 | ||
351 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
352 | bidi_set_free(u, u->meta.dependencies[d]); | |
353 | ||
ef734fd6 LP |
354 | if (u->meta.type != _UNIT_TYPE_INVALID) |
355 | LIST_REMOVE(Meta, units_per_type, u->meta.manager->units_per_type[u->meta.type], &u->meta); | |
356 | ||
87f0e418 LP |
357 | if (u->meta.in_load_queue) |
358 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
359 | ||
c1e1601e LP |
360 | if (u->meta.in_dbus_queue) |
361 | LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
362 | ||
23a177ef LP |
363 | if (u->meta.in_cleanup_queue) |
364 | LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
365 | ||
701cc384 LP |
366 | if (u->meta.in_gc_queue) { |
367 | LIST_REMOVE(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
368 | u->meta.manager->n_in_gc_queue--; | |
369 | } | |
370 | ||
e537352b | 371 | cgroup_bonding_free_list(u->meta.cgroup_bondings); |
87f0e418 | 372 | |
87f0e418 | 373 | free(u->meta.description); |
6be1e7d5 | 374 | free(u->meta.fragment_path); |
87f0e418 | 375 | |
53ec43c6 | 376 | set_free_free(u->meta.names); |
87f0e418 | 377 | |
52661efd LP |
378 | condition_free_list(u->meta.conditions); |
379 | ||
9e2f7c11 | 380 | free(u->meta.instance); |
87f0e418 LP |
381 | free(u); |
382 | } | |
383 | ||
384 | UnitActiveState unit_active_state(Unit *u) { | |
385 | assert(u); | |
386 | ||
6124958c LP |
387 | if (u->meta.load_state == UNIT_MERGED) |
388 | return unit_active_state(unit_follow_merge(u)); | |
389 | ||
390 | /* After a reload it might happen that a unit is not correctly | |
391 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 392 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
393 | |
394 | return UNIT_VTABLE(u)->active_state(u); | |
395 | } | |
396 | ||
10a94420 LP |
397 | const char* unit_sub_state_to_string(Unit *u) { |
398 | assert(u); | |
399 | ||
400 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
401 | } | |
402 | ||
23a177ef LP |
403 | static void complete_move(Set **s, Set **other) { |
404 | assert(s); | |
405 | assert(other); | |
87f0e418 | 406 | |
23a177ef LP |
407 | if (!*other) |
408 | return; | |
87f0e418 LP |
409 | |
410 | if (*s) | |
23a177ef LP |
411 | set_move(*s, *other); |
412 | else { | |
413 | *s = *other; | |
414 | *other = NULL; | |
415 | } | |
416 | } | |
87f0e418 | 417 | |
23a177ef LP |
418 | static void merge_names(Unit *u, Unit *other) { |
419 | char *t; | |
420 | Iterator i; | |
87f0e418 | 421 | |
23a177ef LP |
422 | assert(u); |
423 | assert(other); | |
424 | ||
425 | complete_move(&u->meta.names, &other->meta.names); | |
426 | ||
53ec43c6 | 427 | set_free_free(other->meta.names); |
23a177ef LP |
428 | other->meta.names = NULL; |
429 | other->meta.id = NULL; | |
430 | ||
431 | SET_FOREACH(t, u->meta.names, i) | |
432 | assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0); | |
87f0e418 LP |
433 | } |
434 | ||
23a177ef LP |
435 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
436 | Iterator i; | |
437 | Unit *back; | |
87f0e418 | 438 | int r; |
23a177ef LP |
439 | |
440 | assert(u); | |
441 | assert(other); | |
442 | assert(d < _UNIT_DEPENDENCY_MAX); | |
443 | ||
83a95334 | 444 | /* Fix backwards pointers */ |
23a177ef LP |
445 | SET_FOREACH(back, other->meta.dependencies[d], i) { |
446 | UnitDependency k; | |
447 | ||
448 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
449 | if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) { | |
450 | ||
451 | if (r == -EEXIST) | |
452 | set_remove(back->meta.dependencies[k], other); | |
453 | else | |
454 | assert(r == -ENOENT); | |
455 | } | |
456 | } | |
457 | ||
458 | complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]); | |
459 | ||
460 | set_free(other->meta.dependencies[d]); | |
461 | other->meta.dependencies[d] = NULL; | |
462 | } | |
463 | ||
464 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
465 | UnitDependency d; |
466 | ||
467 | assert(u); | |
468 | assert(other); | |
469 | assert(u->meta.manager == other->meta.manager); | |
9e2f7c11 | 470 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 | 471 | |
cc916967 LP |
472 | other = unit_follow_merge(other); |
473 | ||
23a177ef LP |
474 | if (other == u) |
475 | return 0; | |
476 | ||
9e2f7c11 LP |
477 | if (u->meta.type != other->meta.type) |
478 | return -EINVAL; | |
479 | ||
276c3e78 | 480 | if (!u->meta.instance != !other->meta.instance) |
87f0e418 LP |
481 | return -EINVAL; |
482 | ||
cc916967 | 483 | if (other->meta.load_state != UNIT_STUB && |
fdf20a31 | 484 | other->meta.load_state != UNIT_ERROR) |
23a177ef | 485 | return -EEXIST; |
87f0e418 | 486 | |
819e213f LP |
487 | if (other->meta.job) |
488 | return -EEXIST; | |
489 | ||
fdf20a31 | 490 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
491 | return -EEXIST; |
492 | ||
87f0e418 | 493 | /* Merge names */ |
23a177ef | 494 | merge_names(u, other); |
87f0e418 LP |
495 | |
496 | /* Merge dependencies */ | |
497 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 498 | merge_dependencies(u, other, d); |
87f0e418 | 499 | |
23a177ef LP |
500 | other->meta.load_state = UNIT_MERGED; |
501 | other->meta.merged_into = u; | |
502 | ||
3616a49c LP |
503 | /* If there is still some data attached to the other node, we |
504 | * don't need it anymore, and can free it. */ | |
505 | if (other->meta.load_state != UNIT_STUB) | |
506 | if (UNIT_VTABLE(other)->done) | |
507 | UNIT_VTABLE(other)->done(other); | |
508 | ||
509 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
510 | unit_add_to_cleanup_queue(other); |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | int unit_merge_by_name(Unit *u, const char *name) { | |
516 | Unit *other; | |
9e2f7c11 LP |
517 | int r; |
518 | char *s = NULL; | |
23a177ef LP |
519 | |
520 | assert(u); | |
521 | assert(name); | |
522 | ||
9e2f7c11 LP |
523 | if (unit_name_is_template(name)) { |
524 | if (!u->meta.instance) | |
525 | return -EINVAL; | |
526 | ||
527 | if (!(s = unit_name_replace_instance(name, u->meta.instance))) | |
528 | return -ENOMEM; | |
529 | ||
530 | name = s; | |
531 | } | |
532 | ||
23a177ef | 533 | if (!(other = manager_get_unit(u->meta.manager, name))) |
9e2f7c11 LP |
534 | r = unit_add_name(u, name); |
535 | else | |
536 | r = unit_merge(u, other); | |
23a177ef | 537 | |
9e2f7c11 LP |
538 | free(s); |
539 | return r; | |
23a177ef LP |
540 | } |
541 | ||
542 | Unit* unit_follow_merge(Unit *u) { | |
543 | assert(u); | |
544 | ||
545 | while (u->meta.load_state == UNIT_MERGED) | |
546 | assert_se(u = u->meta.merged_into); | |
547 | ||
548 | return u; | |
549 | } | |
550 | ||
551 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
552 | int r; | |
553 | ||
554 | assert(u); | |
555 | assert(c); | |
556 | ||
ecc6e2b8 LP |
557 | if (c->std_output != EXEC_OUTPUT_KMSG && |
558 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
28dbc1e8 LP |
559 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
560 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
ecc6e2b8 | 561 | c->std_error != EXEC_OUTPUT_KMSG && |
28dbc1e8 LP |
562 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && |
563 | c->std_error != EXEC_OUTPUT_KMSG && | |
564 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) | |
23a177ef LP |
565 | return 0; |
566 | ||
567 | /* If syslog or kernel logging is requested, make sure our own | |
568 | * logging daemon is run first. */ | |
569 | ||
701cc384 | 570 | if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
571 | return r; |
572 | ||
a3d4e06d | 573 | if (u->meta.manager->running_as == MANAGER_SYSTEM) |
701cc384 | 574 | if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
575 | return r; |
576 | ||
87f0e418 LP |
577 | return 0; |
578 | } | |
579 | ||
87f0e418 LP |
580 | const char *unit_description(Unit *u) { |
581 | assert(u); | |
582 | ||
583 | if (u->meta.description) | |
584 | return u->meta.description; | |
585 | ||
9f151f29 | 586 | return strna(u->meta.id); |
87f0e418 LP |
587 | } |
588 | ||
589 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
87f0e418 LP |
590 | char *t; |
591 | UnitDependency d; | |
592 | Iterator i; | |
47be870b LP |
593 | char *p2; |
594 | const char *prefix2; | |
8e274523 | 595 | CGroupBonding *b; |
173e3821 LP |
596 | char |
597 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
598 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
599 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
600 | timestamp4[FORMAT_TIMESTAMP_MAX], |
601 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 602 | Unit *following; |
87f0e418 LP |
603 | |
604 | assert(u); | |
9e2f7c11 | 605 | assert(u->meta.type >= 0); |
87f0e418 LP |
606 | |
607 | if (!prefix) | |
608 | prefix = ""; | |
47be870b LP |
609 | p2 = strappend(prefix, "\t"); |
610 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
611 | |
612 | fprintf(f, | |
40d50879 | 613 | "%s-> Unit %s:\n" |
87f0e418 | 614 | "%s\tDescription: %s\n" |
9e2f7c11 | 615 | "%s\tInstance: %s\n" |
87f0e418 | 616 | "%s\tUnit Load State: %s\n" |
2fad8195 | 617 | "%s\tUnit Active State: %s\n" |
173e3821 | 618 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 619 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 620 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 621 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 LP |
622 | "%s\tGC Check Good: %s\n" |
623 | "%s\tNeed Daemon Reload: %s\n", | |
9e2f7c11 | 624 | prefix, u->meta.id, |
87f0e418 | 625 | prefix, unit_description(u), |
9e2f7c11 | 626 | prefix, strna(u->meta.instance), |
94f04347 | 627 | prefix, unit_load_state_to_string(u->meta.load_state), |
2fad8195 | 628 | prefix, unit_active_state_to_string(unit_active_state(u)), |
871d7de4 LP |
629 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)), |
630 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)), | |
631 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)), | |
632 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)), | |
45fb0699 LP |
633 | prefix, yes_no(unit_check_gc(u)), |
634 | prefix, yes_no(unit_need_daemon_reload(u))); | |
0301abf4 | 635 | |
87f0e418 LP |
636 | SET_FOREACH(t, u->meta.names, i) |
637 | fprintf(f, "%s\tName: %s\n", prefix, t); | |
638 | ||
a7f241db LP |
639 | if ((following = unit_following(u))) |
640 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->meta.id); | |
8fe914ec | 641 | |
23a177ef LP |
642 | if (u->meta.fragment_path) |
643 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path); | |
644 | ||
faf919f1 LP |
645 | if (u->meta.job_timeout > 0) |
646 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->meta.job_timeout)); | |
647 | ||
52661efd LP |
648 | condition_dump_list(u->meta.conditions, f, prefix); |
649 | ||
87f0e418 LP |
650 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
651 | Unit *other; | |
652 | ||
87f0e418 | 653 | SET_FOREACH(other, u->meta.dependencies[d], i) |
9e2f7c11 | 654 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id); |
87f0e418 LP |
655 | } |
656 | ||
23a177ef | 657 | if (u->meta.load_state == UNIT_LOADED) { |
b0650475 | 658 | fprintf(f, |
a40eb732 | 659 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
660 | "%s\tRefuseManualStart: %s\n" |
661 | "%s\tRefuseManualStop: %s\n" | |
ead8e478 | 662 | "%s\tDefaultDependencies: %s\n", |
a40eb732 | 663 | prefix, yes_no(u->meta.stop_when_unneeded), |
b5e9dba8 LP |
664 | prefix, yes_no(u->meta.refuse_manual_start), |
665 | prefix, yes_no(u->meta.refuse_manual_stop), | |
ead8e478 | 666 | prefix, yes_no(u->meta.default_dependencies)); |
b0650475 | 667 | |
23a177ef LP |
668 | LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) |
669 | fprintf(f, "%s\tControlGroup: %s:%s\n", | |
670 | prefix, b->controller, b->path); | |
8e274523 | 671 | |
23a177ef LP |
672 | if (UNIT_VTABLE(u)->dump) |
673 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 LP |
674 | |
675 | } else if (u->meta.load_state == UNIT_MERGED) | |
676 | fprintf(f, | |
677 | "%s\tMerged into: %s\n", | |
9e2f7c11 | 678 | prefix, u->meta.merged_into->meta.id); |
fdf20a31 | 679 | else if (u->meta.load_state == UNIT_ERROR) |
8821a00f LP |
680 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->meta.load_error)); |
681 | ||
87f0e418 LP |
682 | |
683 | if (u->meta.job) | |
684 | job_dump(u->meta.job, f, prefix2); | |
685 | ||
47be870b | 686 | free(p2); |
87f0e418 LP |
687 | } |
688 | ||
689 | /* Common implementation for multiple backends */ | |
e537352b | 690 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
691 | int r; |
692 | ||
693 | assert(u); | |
23a177ef LP |
694 | |
695 | /* Load a .service file */ | |
e537352b | 696 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
697 | return r; |
698 | ||
e537352b | 699 | if (u->meta.load_state == UNIT_STUB) |
23a177ef LP |
700 | return -ENOENT; |
701 | ||
702 | /* Load drop-in directory data */ | |
703 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
704 | return r; | |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
709 | /* Common implementation for multiple backends */ | |
e537352b | 710 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 711 | int r; |
87f0e418 LP |
712 | |
713 | assert(u); | |
714 | ||
23a177ef LP |
715 | /* Same as unit_load_fragment_and_dropin(), but whether |
716 | * something can be loaded or not doesn't matter. */ | |
717 | ||
718 | /* Load a .service file */ | |
e537352b | 719 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
720 | return r; |
721 | ||
e537352b LP |
722 | if (u->meta.load_state == UNIT_STUB) |
723 | u->meta.load_state = UNIT_LOADED; | |
d46de8a1 | 724 | |
87f0e418 | 725 | /* Load drop-in directory data */ |
23a177ef | 726 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
727 | return r; |
728 | ||
23a177ef | 729 | return 0; |
87f0e418 LP |
730 | } |
731 | ||
bba34eed | 732 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
733 | assert(u); |
734 | assert(target); | |
735 | ||
736 | if (target->meta.type != UNIT_TARGET) | |
737 | return 0; | |
738 | ||
35b8ca3a | 739 | /* Only add the dependency if both units are loaded, so that |
bba34eed LP |
740 | * that loop check below is reliable */ |
741 | if (u->meta.load_state != UNIT_LOADED || | |
742 | target->meta.load_state != UNIT_LOADED) | |
743 | return 0; | |
744 | ||
21256a2b LP |
745 | /* If either side wants no automatic dependencies, then let's |
746 | * skip this */ | |
747 | if (!u->meta.default_dependencies || | |
748 | target->meta.default_dependencies) | |
749 | return 0; | |
750 | ||
98bc2000 LP |
751 | /* Don't create loops */ |
752 | if (set_get(target->meta.dependencies[UNIT_BEFORE], u)) | |
753 | return 0; | |
754 | ||
755 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
756 | } | |
757 | ||
758 | static int unit_add_default_dependencies(Unit *u) { | |
21256a2b LP |
759 | static const UnitDependency deps[] = { |
760 | UNIT_REQUIRED_BY, | |
761 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
762 | UNIT_WANTED_BY, | |
763 | UNIT_BOUND_BY | |
764 | }; | |
765 | ||
bba34eed | 766 | Unit *target; |
98bc2000 LP |
767 | Iterator i; |
768 | int r; | |
21256a2b | 769 | unsigned k; |
98bc2000 LP |
770 | |
771 | assert(u); | |
772 | ||
21256a2b LP |
773 | for (k = 0; k < ELEMENTSOF(deps); k++) |
774 | SET_FOREACH(target, u->meta.dependencies[deps[k]], i) | |
775 | if ((r = unit_add_default_target_dependency(u, target)) < 0) | |
776 | return r; | |
b81884e7 | 777 | |
98bc2000 LP |
778 | return 0; |
779 | } | |
780 | ||
87f0e418 LP |
781 | int unit_load(Unit *u) { |
782 | int r; | |
783 | ||
784 | assert(u); | |
785 | ||
786 | if (u->meta.in_load_queue) { | |
787 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
788 | u->meta.in_load_queue = false; | |
789 | } | |
790 | ||
e537352b LP |
791 | if (u->meta.type == _UNIT_TYPE_INVALID) |
792 | return -EINVAL; | |
793 | ||
87f0e418 LP |
794 | if (u->meta.load_state != UNIT_STUB) |
795 | return 0; | |
796 | ||
e537352b LP |
797 | if (UNIT_VTABLE(u)->load) |
798 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 799 | goto fail; |
23a177ef | 800 | |
e537352b | 801 | if (u->meta.load_state == UNIT_STUB) { |
23a177ef LP |
802 | r = -ENOENT; |
803 | goto fail; | |
804 | } | |
805 | ||
98bc2000 LP |
806 | if (u->meta.load_state == UNIT_LOADED && |
807 | u->meta.default_dependencies) | |
808 | if ((r = unit_add_default_dependencies(u)) < 0) | |
809 | goto fail; | |
810 | ||
23a177ef LP |
811 | assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into); |
812 | ||
813 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 814 | unit_add_to_gc_queue(u); |
87f0e418 | 815 | |
87f0e418 LP |
816 | return 0; |
817 | ||
818 | fail: | |
fdf20a31 | 819 | u->meta.load_state = UNIT_ERROR; |
8821a00f | 820 | u->meta.load_error = r; |
c1e1601e | 821 | unit_add_to_dbus_queue(u); |
23a177ef | 822 | |
8821a00f | 823 | log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); |
23a177ef | 824 | |
87f0e418 LP |
825 | return r; |
826 | } | |
827 | ||
828 | /* Errors: | |
d5159713 LP |
829 | * -EBADR: This unit type does not support starting. |
830 | * -EALREADY: Unit is already started. | |
831 | * -EAGAIN: An operation is already in progress. Retry later. | |
832 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
833 | */ |
834 | int unit_start(Unit *u) { | |
835 | UnitActiveState state; | |
92ab323c | 836 | Unit *following; |
87f0e418 LP |
837 | |
838 | assert(u); | |
839 | ||
6124958c LP |
840 | if (u->meta.load_state != UNIT_LOADED) |
841 | return -EINVAL; | |
842 | ||
7898b0cf LP |
843 | /* If this is already (being) started, then this will |
844 | * succeed. Note that this will even succeed if this unit is | |
845 | * not startable by the user. This is relied on to detect when | |
846 | * we need to wait for units and when waiting is finished. */ | |
87f0e418 LP |
847 | state = unit_active_state(u); |
848 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
849 | return -EALREADY; | |
850 | ||
52661efd LP |
851 | /* If the conditions failed, don't do anything at all */ |
852 | if (!condition_test_list(u->meta.conditions)) { | |
853 | log_debug("Starting of %s requested but condition failed. Ignoring.", u->meta.id); | |
854 | return -EALREADY; | |
855 | } | |
856 | ||
92ab323c LP |
857 | /* Forward to the main object, if we aren't it. */ |
858 | if ((following = unit_following(u))) { | |
859 | log_debug("Redirecting start request from %s to %s.", u->meta.id, following->meta.id); | |
860 | return unit_start(following); | |
861 | } | |
862 | ||
863 | /* If it is stopped, but we cannot start it, then fail */ | |
864 | if (!UNIT_VTABLE(u)->start) | |
865 | return -EBADR; | |
866 | ||
87f0e418 LP |
867 | /* We don't suppress calls to ->start() here when we are |
868 | * already starting, to allow this request to be used as a | |
869 | * "hurry up" call, for example when the unit is in some "auto | |
870 | * restart" state where it waits for a holdoff timer to elapse | |
871 | * before it will start again. */ | |
872 | ||
c1e1601e | 873 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
874 | |
875 | unit_status_printf(u, "Starting %s...\n", unit_description(u)); | |
87f0e418 LP |
876 | return UNIT_VTABLE(u)->start(u); |
877 | } | |
878 | ||
879 | bool unit_can_start(Unit *u) { | |
880 | assert(u); | |
881 | ||
882 | return !!UNIT_VTABLE(u)->start; | |
883 | } | |
884 | ||
2528a7a6 LP |
885 | bool unit_can_isolate(Unit *u) { |
886 | assert(u); | |
887 | ||
888 | return unit_can_start(u) && | |
889 | u->meta.allow_isolate; | |
890 | } | |
891 | ||
87f0e418 LP |
892 | /* Errors: |
893 | * -EBADR: This unit type does not support stopping. | |
894 | * -EALREADY: Unit is already stopped. | |
895 | * -EAGAIN: An operation is already in progress. Retry later. | |
896 | */ | |
897 | int unit_stop(Unit *u) { | |
898 | UnitActiveState state; | |
92ab323c | 899 | Unit *following; |
87f0e418 LP |
900 | |
901 | assert(u); | |
902 | ||
87f0e418 | 903 | state = unit_active_state(u); |
fdf20a31 | 904 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
905 | return -EALREADY; |
906 | ||
92ab323c LP |
907 | if ((following = unit_following(u))) { |
908 | log_debug("Redirecting stop request from %s to %s.", u->meta.id, following->meta.id); | |
909 | return unit_stop(following); | |
910 | } | |
911 | ||
7898b0cf LP |
912 | if (!UNIT_VTABLE(u)->stop) |
913 | return -EBADR; | |
914 | ||
c1e1601e | 915 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
916 | |
917 | unit_status_printf(u, "Stopping %s...\n", unit_description(u)); | |
87f0e418 LP |
918 | return UNIT_VTABLE(u)->stop(u); |
919 | } | |
920 | ||
921 | /* Errors: | |
922 | * -EBADR: This unit type does not support reloading. | |
923 | * -ENOEXEC: Unit is not started. | |
924 | * -EAGAIN: An operation is already in progress. Retry later. | |
925 | */ | |
926 | int unit_reload(Unit *u) { | |
927 | UnitActiveState state; | |
92ab323c | 928 | Unit *following; |
87f0e418 LP |
929 | |
930 | assert(u); | |
931 | ||
6124958c LP |
932 | if (u->meta.load_state != UNIT_LOADED) |
933 | return -EINVAL; | |
934 | ||
87f0e418 LP |
935 | if (!unit_can_reload(u)) |
936 | return -EBADR; | |
937 | ||
938 | state = unit_active_state(u); | |
e364ad06 | 939 | if (state == UNIT_RELOADING) |
87f0e418 LP |
940 | return -EALREADY; |
941 | ||
e364ad06 | 942 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
943 | return -ENOEXEC; |
944 | ||
92ab323c LP |
945 | if ((following = unit_following(u))) { |
946 | log_debug("Redirecting reload request from %s to %s.", u->meta.id, following->meta.id); | |
947 | return unit_reload(following); | |
948 | } | |
949 | ||
c1e1601e | 950 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
951 | return UNIT_VTABLE(u)->reload(u); |
952 | } | |
953 | ||
954 | bool unit_can_reload(Unit *u) { | |
955 | assert(u); | |
956 | ||
957 | if (!UNIT_VTABLE(u)->reload) | |
958 | return false; | |
959 | ||
960 | if (!UNIT_VTABLE(u)->can_reload) | |
961 | return true; | |
962 | ||
963 | return UNIT_VTABLE(u)->can_reload(u); | |
964 | } | |
965 | ||
b4a16b7b | 966 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
967 | Iterator i; |
968 | Unit *other; | |
969 | ||
970 | assert(u); | |
971 | ||
972 | /* If this service shall be shut down when unneeded then do | |
973 | * so. */ | |
974 | ||
975 | if (!u->meta.stop_when_unneeded) | |
976 | return; | |
977 | ||
978 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
979 | return; | |
980 | ||
981 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
982 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
983 | return; | |
984 | ||
9e2f7c11 | 985 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f3bff0eb LP |
986 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
987 | return; | |
988 | ||
989 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i) | |
990 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
991 | return; | |
992 | ||
b81884e7 LP |
993 | SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i) |
994 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
995 | return; | |
996 | ||
54165a39 | 997 | log_info("Service %s is not needed anymore. Stopping.", u->meta.id); |
f3bff0eb LP |
998 | |
999 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
398ef8ba | 1000 | manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1001 | } |
1002 | ||
87f0e418 LP |
1003 | static void retroactively_start_dependencies(Unit *u) { |
1004 | Iterator i; | |
1005 | Unit *other; | |
1006 | ||
1007 | assert(u); | |
1008 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1009 | ||
1010 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
b81884e7 LP |
1011 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1012 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
1013 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); | |
1014 | ||
1015 | SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i) | |
1016 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && | |
1017 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1018 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1019 | |
9e2f7c11 | 1020 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
b81884e7 LP |
1021 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1022 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1023 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
1024 | |
1025 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
b81884e7 LP |
1026 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1027 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1028 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1029 | |
1030 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
b81884e7 LP |
1031 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1032 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1033 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
1034 | |
1035 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) | |
b81884e7 | 1036 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
398ef8ba | 1037 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 LP |
1038 | |
1039 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i) | |
b81884e7 | 1040 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
69dd2852 | 1041 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1042 | } |
1043 | ||
1044 | static void retroactively_stop_dependencies(Unit *u) { | |
1045 | Iterator i; | |
1046 | Unit *other; | |
1047 | ||
1048 | assert(u); | |
1049 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1050 | ||
b81884e7 LP |
1051 | /* Pull down units which are bound to us recursively if enabled */ |
1052 | SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i) | |
1053 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
f14e15f8 | 1054 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
f3bff0eb LP |
1055 | |
1056 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
1057 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
87f0e418 | 1058 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1059 | unit_check_unneeded(other); |
9e2f7c11 | 1060 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1061 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1062 | unit_check_unneeded(other); |
f3bff0eb LP |
1063 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) |
1064 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
b4a16b7b | 1065 | unit_check_unneeded(other); |
f3bff0eb LP |
1066 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) |
1067 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
b4a16b7b | 1068 | unit_check_unneeded(other); |
9e2f7c11 | 1069 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1070 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1071 | unit_check_unneeded(other); |
b81884e7 LP |
1072 | SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i) |
1073 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1074 | unit_check_unneeded(other); | |
87f0e418 LP |
1075 | } |
1076 | ||
c0daa706 LP |
1077 | void unit_trigger_on_failure(Unit *u) { |
1078 | Unit *other; | |
1079 | Iterator i; | |
1080 | ||
1081 | assert(u); | |
1082 | ||
1083 | SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i) | |
1084 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); | |
1085 | } | |
1086 | ||
e2f3b44c | 1087 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
63983207 | 1088 | dual_timestamp ts; |
7e6e7b06 | 1089 | bool unexpected; |
a096ed36 | 1090 | |
87f0e418 LP |
1091 | assert(u); |
1092 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1093 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1094 | |
8e471ccd LP |
1095 | /* Note that this is called for all low-level state changes, |
1096 | * even if they might map to the same high-level | |
1097 | * UnitActiveState! That means that ns == os is OK an expected | |
1098 | * behaviour here. For example: if a mount point is remounted | |
cd6d0a45 | 1099 | * this function will be called too! */ |
87f0e418 | 1100 | |
63983207 | 1101 | dual_timestamp_get(&ts); |
173e3821 | 1102 | |
fdf20a31 | 1103 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
173e3821 | 1104 | u->meta.inactive_exit_timestamp = ts; |
fdf20a31 | 1105 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
173e3821 LP |
1106 | u->meta.inactive_enter_timestamp = ts; |
1107 | ||
87f0e418 | 1108 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 1109 | u->meta.active_enter_timestamp = ts; |
87f0e418 | 1110 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 1111 | u->meta.active_exit_timestamp = ts; |
87f0e418 | 1112 | |
fdf20a31 | 1113 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
fb385181 LP |
1114 | cgroup_bonding_trim_list(u->meta.cgroup_bondings, true); |
1115 | ||
871d7de4 | 1116 | timer_unit_notify(u, ns); |
01f78473 | 1117 | path_unit_notify(u, ns); |
871d7de4 | 1118 | |
87f0e418 | 1119 | if (u->meta.job) { |
7e6e7b06 | 1120 | unexpected = false; |
87f0e418 LP |
1121 | |
1122 | if (u->meta.job->state == JOB_WAITING) | |
1123 | ||
1124 | /* So we reached a different state for this | |
1125 | * job. Let's see if we can run it now if it | |
1126 | * failed previously due to EAGAIN. */ | |
c1e1601e | 1127 | job_add_to_run_queue(u->meta.job); |
87f0e418 | 1128 | |
b410e6b9 | 1129 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1130 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1131 | * hence needs to invalidate jobs. */ |
87f0e418 | 1132 | |
b410e6b9 | 1133 | switch (u->meta.job->type) { |
87f0e418 | 1134 | |
b410e6b9 LP |
1135 | case JOB_START: |
1136 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1137 | |
b410e6b9 | 1138 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5d44db4a | 1139 | job_finish_and_invalidate(u->meta.job, JOB_DONE); |
b410e6b9 LP |
1140 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
1141 | unexpected = true; | |
41b02ec7 | 1142 | |
fdf20a31 | 1143 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5d44db4a | 1144 | job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
b410e6b9 | 1145 | } |
87f0e418 | 1146 | |
b410e6b9 | 1147 | break; |
87f0e418 | 1148 | |
b410e6b9 LP |
1149 | case JOB_RELOAD: |
1150 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1151 | |
b410e6b9 | 1152 | if (u->meta.job->state == JOB_RUNNING) { |
a096ed36 | 1153 | if (ns == UNIT_ACTIVE) |
5d44db4a | 1154 | job_finish_and_invalidate(u->meta.job, reload_success ? JOB_DONE : JOB_FAILED); |
032ff4af | 1155 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1156 | unexpected = true; |
41b02ec7 | 1157 | |
fdf20a31 | 1158 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5d44db4a | 1159 | job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
a096ed36 | 1160 | } |
b410e6b9 | 1161 | } |
87f0e418 | 1162 | |
b410e6b9 | 1163 | break; |
87f0e418 | 1164 | |
b410e6b9 LP |
1165 | case JOB_STOP: |
1166 | case JOB_RESTART: | |
1167 | case JOB_TRY_RESTART: | |
87f0e418 | 1168 | |
fdf20a31 | 1169 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5d44db4a | 1170 | job_finish_and_invalidate(u->meta.job, JOB_DONE); |
b410e6b9 LP |
1171 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
1172 | unexpected = true; | |
5d44db4a | 1173 | job_finish_and_invalidate(u->meta.job, JOB_FAILED); |
b410e6b9 | 1174 | } |
87f0e418 | 1175 | |
b410e6b9 | 1176 | break; |
87f0e418 | 1177 | |
b410e6b9 LP |
1178 | default: |
1179 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1180 | } |
87f0e418 | 1181 | |
7e6e7b06 LP |
1182 | } else |
1183 | unexpected = true; | |
1184 | ||
9f611ad8 LP |
1185 | /* If this state change happened without being requested by a |
1186 | * job, then let's retroactively start or stop | |
1187 | * dependencies. We skip that step when deserializing, since | |
1188 | * we don't want to create any additional jobs just because | |
1189 | * something is already activated. */ | |
1190 | ||
1191 | if (unexpected && u->meta.manager->n_deserializing <= 0) { | |
5ed9f5d6 | 1192 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) |
7e6e7b06 LP |
1193 | retroactively_start_dependencies(u); |
1194 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1195 | retroactively_stop_dependencies(u); | |
a096ed36 | 1196 | } |
f3bff0eb | 1197 | |
fdf20a31 | 1198 | if (ns != os && ns == UNIT_FAILED) { |
fdf20a31 | 1199 | log_notice("Unit %s entered failed state.", u->meta.id); |
c0daa706 | 1200 | unit_trigger_on_failure(u); |
5de9682c LP |
1201 | } |
1202 | ||
e537352b LP |
1203 | /* Some names are special */ |
1204 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
4927fcae | 1205 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) |
e537352b LP |
1206 | /* The bus just might have become available, |
1207 | * hence try to connect to it, if we aren't | |
1208 | * yet connected. */ | |
3996fbe2 | 1209 | bus_init(u->meta.manager, true); |
f278026d | 1210 | |
e537352b LP |
1211 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) |
1212 | /* The syslog daemon just might have become | |
1213 | * available, hence try to connect to it, if | |
1214 | * we aren't yet connected. */ | |
843d2643 | 1215 | log_open(); |
f278026d | 1216 | |
4927fcae | 1217 | if (u->meta.type == UNIT_SERVICE && |
cd6d0a45 | 1218 | !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
4927fcae | 1219 | /* Write audit record if we have just finished starting up */ |
e983b760 | 1220 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, true); |
cd6d0a45 LP |
1221 | u->meta.in_audit = true; |
1222 | } | |
e537352b | 1223 | |
e983b760 LP |
1224 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
1225 | manager_send_unit_plymouth(u->meta.manager, u); | |
1226 | ||
4927fcae | 1227 | } else { |
f278026d LP |
1228 | |
1229 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) | |
e537352b LP |
1230 | /* The syslog daemon might just have |
1231 | * terminated, hence try to disconnect from | |
1232 | * it. */ | |
2882c7ed | 1233 | log_close_syslog(); |
f278026d LP |
1234 | |
1235 | /* We don't care about D-Bus here, since we'll get an | |
1236 | * asynchronous notification for it anyway. */ | |
4927fcae LP |
1237 | |
1238 | if (u->meta.type == UNIT_SERVICE && | |
fdf20a31 MM |
1239 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1240 | !UNIT_IS_INACTIVE_OR_FAILED(os)) { | |
cd6d0a45 LP |
1241 | |
1242 | /* Hmm, if there was no start record written | |
1243 | * write it now, so that we always have a nice | |
1244 | * pair */ | |
1245 | if (!u->meta.in_audit) { | |
1246 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
4927fcae | 1247 | |
cd6d0a45 LP |
1248 | if (ns == UNIT_INACTIVE) |
1249 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true); | |
1250 | } else | |
1251 | /* Write audit record if we have just finished shutting down */ | |
1252 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
1253 | ||
1254 | u->meta.in_audit = false; | |
1255 | } | |
f278026d LP |
1256 | } |
1257 | ||
f3bff0eb LP |
1258 | /* Maybe we finished startup and are now ready for being |
1259 | * stopped because unneeded? */ | |
b4a16b7b | 1260 | unit_check_unneeded(u); |
c1e1601e LP |
1261 | |
1262 | unit_add_to_dbus_queue(u); | |
701cc384 | 1263 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1264 | } |
1265 | ||
acbb0225 | 1266 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1267 | struct epoll_event ev; |
1268 | ||
1269 | assert(u); | |
1270 | assert(fd >= 0); | |
acbb0225 | 1271 | assert(w); |
ea430986 | 1272 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1273 | |
1274 | zero(ev); | |
acbb0225 | 1275 | ev.data.ptr = w; |
87f0e418 LP |
1276 | ev.events = events; |
1277 | ||
acbb0225 LP |
1278 | if (epoll_ctl(u->meta.manager->epoll_fd, |
1279 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, | |
1280 | fd, | |
1281 | &ev) < 0) | |
1282 | return -errno; | |
87f0e418 | 1283 | |
acbb0225 LP |
1284 | w->fd = fd; |
1285 | w->type = WATCH_FD; | |
ea430986 | 1286 | w->data.unit = u; |
87f0e418 | 1287 | |
acbb0225 | 1288 | return 0; |
87f0e418 LP |
1289 | } |
1290 | ||
acbb0225 | 1291 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1292 | assert(u); |
acbb0225 | 1293 | assert(w); |
87f0e418 | 1294 | |
acbb0225 LP |
1295 | if (w->type == WATCH_INVALID) |
1296 | return; | |
1297 | ||
ea430986 LP |
1298 | assert(w->type == WATCH_FD); |
1299 | assert(w->data.unit == u); | |
acbb0225 LP |
1300 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
1301 | ||
1302 | w->fd = -1; | |
1303 | w->type = WATCH_INVALID; | |
ea430986 | 1304 | w->data.unit = NULL; |
87f0e418 LP |
1305 | } |
1306 | ||
1307 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1308 | assert(u); | |
1309 | assert(pid >= 1); | |
1310 | ||
05e343b7 LP |
1311 | /* Watch a specific PID. We only support one unit watching |
1312 | * each PID for now. */ | |
1313 | ||
c6c18be3 | 1314 | return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1315 | } |
1316 | ||
1317 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1318 | assert(u); | |
1319 | assert(pid >= 1); | |
1320 | ||
c6c18be3 | 1321 | hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1322 | } |
1323 | ||
acbb0225 | 1324 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1325 | struct itimerspec its; |
acbb0225 | 1326 | int flags, fd; |
87f0e418 LP |
1327 | bool ours; |
1328 | ||
1329 | assert(u); | |
acbb0225 | 1330 | assert(w); |
faf919f1 | 1331 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1332 | |
1333 | /* This will try to reuse the old timer if there is one */ | |
1334 | ||
faf919f1 LP |
1335 | if (w->type == WATCH_UNIT_TIMER) { |
1336 | assert(w->data.unit == u); | |
1337 | assert(w->fd >= 0); | |
1338 | ||
87f0e418 | 1339 | ours = false; |
acbb0225 | 1340 | fd = w->fd; |
faf919f1 LP |
1341 | } else if (w->type == WATCH_INVALID) { |
1342 | ||
87f0e418 | 1343 | ours = true; |
87f0e418 LP |
1344 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1345 | return -errno; | |
faf919f1 LP |
1346 | } else |
1347 | assert_not_reached("Invalid watch type"); | |
87f0e418 LP |
1348 | |
1349 | zero(its); | |
1350 | ||
1351 | if (delay <= 0) { | |
1352 | /* Set absolute time in the past, but not 0, since we | |
1353 | * don't want to disarm the timer */ | |
1354 | its.it_value.tv_sec = 0; | |
1355 | its.it_value.tv_nsec = 1; | |
1356 | ||
1357 | flags = TFD_TIMER_ABSTIME; | |
1358 | } else { | |
1359 | timespec_store(&its.it_value, delay); | |
1360 | flags = 0; | |
1361 | } | |
1362 | ||
1363 | /* This will also flush the elapse counter */ | |
1364 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1365 | goto fail; | |
1366 | ||
acbb0225 LP |
1367 | if (w->type == WATCH_INVALID) { |
1368 | struct epoll_event ev; | |
87f0e418 | 1369 | |
acbb0225 LP |
1370 | zero(ev); |
1371 | ev.data.ptr = w; | |
f94ea366 | 1372 | ev.events = EPOLLIN; |
acbb0225 LP |
1373 | |
1374 | if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) | |
1375 | goto fail; | |
1376 | } | |
1377 | ||
faf919f1 | 1378 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1379 | w->fd = fd; |
ea430986 | 1380 | w->data.unit = u; |
87f0e418 | 1381 | |
87f0e418 LP |
1382 | return 0; |
1383 | ||
1384 | fail: | |
1385 | if (ours) | |
ea430986 | 1386 | close_nointr_nofail(fd); |
87f0e418 LP |
1387 | |
1388 | return -errno; | |
1389 | } | |
1390 | ||
acbb0225 | 1391 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1392 | assert(u); |
acbb0225 | 1393 | assert(w); |
87f0e418 | 1394 | |
acbb0225 | 1395 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1396 | return; |
1397 | ||
faf919f1 LP |
1398 | assert(w->type == WATCH_UNIT_TIMER); |
1399 | assert(w->data.unit == u); | |
1400 | assert(w->fd >= 0); | |
acbb0225 LP |
1401 | |
1402 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
a16e1123 | 1403 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1404 | |
1405 | w->fd = -1; | |
1406 | w->type = WATCH_INVALID; | |
ea430986 | 1407 | w->data.unit = NULL; |
87f0e418 LP |
1408 | } |
1409 | ||
1410 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1411 | assert(u); | |
1412 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1413 | ||
1414 | switch (j) { | |
1415 | ||
1416 | case JOB_VERIFY_ACTIVE: | |
1417 | case JOB_START: | |
57339f47 | 1418 | case JOB_STOP: |
87f0e418 LP |
1419 | return true; |
1420 | ||
87f0e418 LP |
1421 | case JOB_RESTART: |
1422 | case JOB_TRY_RESTART: | |
1423 | return unit_can_start(u); | |
1424 | ||
1425 | case JOB_RELOAD: | |
1426 | return unit_can_reload(u); | |
1427 | ||
1428 | case JOB_RELOAD_OR_START: | |
1429 | return unit_can_reload(u) && unit_can_start(u); | |
1430 | ||
1431 | default: | |
1432 | assert_not_reached("Invalid job type"); | |
1433 | } | |
1434 | } | |
1435 | ||
701cc384 | 1436 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1437 | |
1438 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1439 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1440 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1441 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1442 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1443 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
b81884e7 | 1444 | [UNIT_BIND_TO] = UNIT_BOUND_BY, |
87f0e418 | 1445 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1446 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1447 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
b81884e7 | 1448 | [UNIT_BOUND_BY] = UNIT_BIND_TO, |
69dd2852 LP |
1449 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1450 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1451 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1452 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1453 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 LP |
1454 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
1455 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES | |
87f0e418 | 1456 | }; |
701cc384 | 1457 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1458 | |
1459 | assert(u); | |
1460 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1461 | assert(other); |
1462 | ||
9f151f29 LP |
1463 | u = unit_follow_merge(u); |
1464 | other = unit_follow_merge(other); | |
1465 | ||
87f0e418 LP |
1466 | /* We won't allow dependencies on ourselves. We will not |
1467 | * consider them an error however. */ | |
1468 | if (u == other) | |
1469 | return 0; | |
1470 | ||
5de9682c | 1471 | if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1472 | return r; |
1473 | ||
5de9682c LP |
1474 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
1475 | if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) | |
1476 | return r; | |
1477 | ||
701cc384 LP |
1478 | if (add_reference) |
1479 | if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || | |
1480 | (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
1481 | return r; | |
87f0e418 | 1482 | |
701cc384 LP |
1483 | if ((q = set_put(u->meta.dependencies[d], other)) < 0) |
1484 | return q; | |
87f0e418 | 1485 | |
5de9682c LP |
1486 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
1487 | if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) { | |
1488 | r = v; | |
1489 | goto fail; | |
1490 | } | |
701cc384 LP |
1491 | |
1492 | if (add_reference) { | |
1493 | if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) { | |
1494 | r = w; | |
1495 | goto fail; | |
1496 | } | |
1497 | ||
1498 | if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0) | |
1499 | goto fail; | |
87f0e418 LP |
1500 | } |
1501 | ||
c1e1601e | 1502 | unit_add_to_dbus_queue(u); |
87f0e418 | 1503 | return 0; |
701cc384 LP |
1504 | |
1505 | fail: | |
1506 | if (q > 0) | |
1507 | set_remove(u->meta.dependencies[d], other); | |
1508 | ||
1509 | if (v > 0) | |
1510 | set_remove(other->meta.dependencies[inverse_table[d]], u); | |
1511 | ||
1512 | if (w > 0) | |
1513 | set_remove(u->meta.dependencies[UNIT_REFERENCES], other); | |
1514 | ||
1515 | return r; | |
87f0e418 | 1516 | } |
0301abf4 | 1517 | |
2c966c03 LP |
1518 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1519 | int r; | |
1520 | ||
1521 | assert(u); | |
1522 | ||
1523 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1524 | return r; | |
1525 | ||
1526 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1527 | return r; | |
1528 | ||
1529 | return 0; | |
1530 | } | |
1531 | ||
9e2f7c11 LP |
1532 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1533 | char *s; | |
1534 | ||
1535 | assert(u); | |
1536 | assert(name || path); | |
1537 | ||
1538 | if (!name) | |
1539 | name = file_name_from_path(path); | |
1540 | ||
1541 | if (!unit_name_is_template(name)) { | |
1542 | *p = NULL; | |
1543 | return name; | |
1544 | } | |
1545 | ||
1546 | if (u->meta.instance) | |
1547 | s = unit_name_replace_instance(name, u->meta.instance); | |
1548 | else { | |
1549 | char *i; | |
1550 | ||
1551 | if (!(i = unit_name_to_prefix(u->meta.id))) | |
1552 | return NULL; | |
1553 | ||
1554 | s = unit_name_replace_instance(name, i); | |
1555 | free(i); | |
1556 | } | |
1557 | ||
1558 | if (!s) | |
1559 | return NULL; | |
1560 | ||
1561 | *p = s; | |
1562 | return s; | |
1563 | } | |
1564 | ||
701cc384 | 1565 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1566 | Unit *other; |
1567 | int r; | |
9e2f7c11 | 1568 | char *s; |
09b6b09f | 1569 | |
9e2f7c11 LP |
1570 | assert(u); |
1571 | assert(name || path); | |
09b6b09f | 1572 | |
9e2f7c11 LP |
1573 | if (!(name = resolve_template(u, name, path, &s))) |
1574 | return -ENOMEM; | |
09b6b09f | 1575 | |
398ef8ba | 1576 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1577 | goto finish; |
1578 | ||
701cc384 | 1579 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1580 | |
1581 | finish: | |
1582 | free(s); | |
1583 | return r; | |
09b6b09f LP |
1584 | } |
1585 | ||
2c966c03 LP |
1586 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1587 | Unit *other; | |
1588 | int r; | |
1589 | char *s; | |
1590 | ||
1591 | assert(u); | |
1592 | assert(name || path); | |
1593 | ||
1594 | if (!(name = resolve_template(u, name, path, &s))) | |
1595 | return -ENOMEM; | |
1596 | ||
398ef8ba | 1597 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1598 | goto finish; |
1599 | ||
1600 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1601 | ||
1602 | finish: | |
1603 | free(s); | |
1604 | return r; | |
1605 | } | |
1606 | ||
701cc384 | 1607 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1608 | Unit *other; |
1609 | int r; | |
9e2f7c11 | 1610 | char *s; |
bd77d0fc | 1611 | |
9e2f7c11 LP |
1612 | assert(u); |
1613 | assert(name || path); | |
bd77d0fc | 1614 | |
9e2f7c11 LP |
1615 | if (!(name = resolve_template(u, name, path, &s))) |
1616 | return -ENOMEM; | |
bd77d0fc | 1617 | |
398ef8ba | 1618 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1619 | goto finish; |
1620 | ||
701cc384 | 1621 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1622 | |
1623 | finish: | |
1624 | free(s); | |
1625 | return r; | |
bd77d0fc LP |
1626 | } |
1627 | ||
2c966c03 LP |
1628 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1629 | Unit *other; | |
1630 | int r; | |
1631 | char *s; | |
1632 | ||
1633 | assert(u); | |
1634 | assert(name || path); | |
1635 | ||
1636 | if (!(name = resolve_template(u, name, path, &s))) | |
1637 | return -ENOMEM; | |
1638 | ||
398ef8ba | 1639 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1640 | goto finish; |
1641 | ||
1642 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1643 | goto finish; | |
1644 | ||
1645 | finish: | |
1646 | free(s); | |
1647 | return r; | |
1648 | } | |
1649 | ||
0301abf4 LP |
1650 | int set_unit_path(const char *p) { |
1651 | char *cwd, *c; | |
1652 | int r; | |
1653 | ||
1654 | /* This is mostly for debug purposes */ | |
1655 | ||
1656 | if (path_is_absolute(p)) { | |
1657 | if (!(c = strdup(p))) | |
1658 | return -ENOMEM; | |
1659 | } else { | |
1660 | if (!(cwd = get_current_dir_name())) | |
1661 | return -errno; | |
1662 | ||
1663 | r = asprintf(&c, "%s/%s", cwd, p); | |
1664 | free(cwd); | |
1665 | ||
1666 | if (r < 0) | |
1667 | return -ENOMEM; | |
1668 | } | |
1669 | ||
036643a2 | 1670 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1671 | r = -errno; |
1672 | free(c); | |
1673 | return r; | |
1674 | } | |
1675 | ||
1676 | return 0; | |
1677 | } | |
88066b3a | 1678 | |
ea430986 LP |
1679 | char *unit_dbus_path(Unit *u) { |
1680 | char *p, *e; | |
1681 | ||
1682 | assert(u); | |
1683 | ||
04ade7d2 LP |
1684 | if (!u->meta.id) |
1685 | return NULL; | |
1686 | ||
9e2f7c11 | 1687 | if (!(e = bus_path_escape(u->meta.id))) |
ea430986 LP |
1688 | return NULL; |
1689 | ||
35d2e7ec | 1690 | p = strappend("/org/freedesktop/systemd1/unit/", e); |
ea430986 | 1691 | free(e); |
35d2e7ec | 1692 | |
ea430986 LP |
1693 | return p; |
1694 | } | |
1695 | ||
8e274523 | 1696 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
8e274523 LP |
1697 | int r; |
1698 | ||
1699 | assert(u); | |
1700 | assert(b); | |
35d2e7ec | 1701 | |
8e274523 LP |
1702 | assert(b->path); |
1703 | ||
35d2e7ec LP |
1704 | if (!b->controller) |
1705 | if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) | |
1706 | return -ENOMEM; | |
1707 | ||
8e274523 LP |
1708 | /* Ensure this hasn't been added yet */ |
1709 | assert(!b->unit); | |
1710 | ||
d686d8a9 LP |
1711 | if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
1712 | CGroupBonding *l; | |
8e274523 | 1713 | |
d686d8a9 LP |
1714 | l = hashmap_get(u->meta.manager->cgroup_bondings, b->path); |
1715 | LIST_PREPEND(CGroupBonding, by_path, l, b); | |
1716 | ||
1717 | if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) { | |
1718 | LIST_REMOVE(CGroupBonding, by_path, l, b); | |
1719 | return r; | |
1720 | } | |
8e274523 LP |
1721 | } |
1722 | ||
1723 | LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b); | |
1724 | b->unit = u; | |
1725 | ||
1726 | return 0; | |
1727 | } | |
1728 | ||
013b87c0 LP |
1729 | static char *default_cgroup_path(Unit *u) { |
1730 | char *p; | |
4f2d528d | 1731 | int r; |
013b87c0 LP |
1732 | |
1733 | assert(u); | |
1734 | ||
4f2d528d LP |
1735 | if (u->meta.instance) { |
1736 | char *t; | |
013b87c0 | 1737 | |
4f2d528d LP |
1738 | if (!(t = unit_name_template(u->meta.id))) |
1739 | return NULL; | |
1740 | ||
1741 | r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance); | |
1742 | free(t); | |
1743 | } else | |
1744 | r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id); | |
1745 | ||
1746 | return r < 0 ? NULL : p; | |
013b87c0 LP |
1747 | } |
1748 | ||
8e274523 | 1749 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
013b87c0 LP |
1750 | char *controller = NULL, *path = NULL; |
1751 | CGroupBonding *b = NULL; | |
8e274523 LP |
1752 | int r; |
1753 | ||
1754 | assert(u); | |
1755 | assert(name); | |
1756 | ||
35d2e7ec LP |
1757 | if ((r = cg_split_spec(name, &controller, &path)) < 0) |
1758 | return r; | |
8e274523 | 1759 | |
35d2e7ec LP |
1760 | if (!path) |
1761 | path = default_cgroup_path(u); | |
013b87c0 | 1762 | |
35d2e7ec | 1763 | if (!controller) |
55096547 | 1764 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
013b87c0 | 1765 | |
35d2e7ec LP |
1766 | if (!path || !controller) { |
1767 | free(path); | |
1768 | free(controller); | |
1769 | ||
1770 | return -ENOMEM; | |
8e274523 LP |
1771 | } |
1772 | ||
013b87c0 LP |
1773 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) { |
1774 | r = -EEXIST; | |
1775 | goto fail; | |
1776 | } | |
8e274523 | 1777 | |
013b87c0 | 1778 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1779 | r = -ENOMEM; |
1780 | goto fail; | |
1781 | } | |
1782 | ||
013b87c0 LP |
1783 | b->controller = controller; |
1784 | b->path = path; | |
d686d8a9 | 1785 | b->ours = false; |
8e274523 LP |
1786 | |
1787 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1788 | goto fail; | |
1789 | ||
1790 | return 0; | |
1791 | ||
1792 | fail: | |
013b87c0 LP |
1793 | free(path); |
1794 | free(controller); | |
8e274523 LP |
1795 | free(b); |
1796 | ||
1797 | return r; | |
1798 | } | |
1799 | ||
06d4c99a | 1800 | static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
d686d8a9 | 1801 | CGroupBonding *b = NULL; |
8e274523 LP |
1802 | int r = -ENOMEM; |
1803 | ||
1804 | assert(u); | |
1805 | ||
06d4c99a LP |
1806 | if (!controller) |
1807 | controller = SYSTEMD_CGROUP_CONTROLLER; | |
8e274523 | 1808 | |
06d4c99a LP |
1809 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) |
1810 | return 0; | |
8e274523 | 1811 | |
06d4c99a LP |
1812 | if (!(b = new0(CGroupBonding, 1))) |
1813 | return -ENOMEM; | |
8e274523 | 1814 | |
06d4c99a LP |
1815 | if (!(b->controller = strdup(controller))) |
1816 | goto fail; | |
d686d8a9 | 1817 | |
06d4c99a LP |
1818 | if (!(b->path = default_cgroup_path(u))) |
1819 | goto fail; | |
d686d8a9 | 1820 | |
06d4c99a LP |
1821 | b->ours = true; |
1822 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
d686d8a9 | 1823 | |
06d4c99a LP |
1824 | if ((r = unit_add_cgroup(u, b)) < 0) |
1825 | goto fail; | |
8e274523 LP |
1826 | |
1827 | return 0; | |
1828 | ||
1829 | fail: | |
06d4c99a LP |
1830 | free(b->path); |
1831 | free(b->controller); | |
1832 | free(b); | |
8e274523 LP |
1833 | |
1834 | return r; | |
1835 | } | |
1836 | ||
06d4c99a LP |
1837 | int unit_add_default_cgroups(Unit *u) { |
1838 | char **c; | |
1839 | int r; | |
1840 | assert(u); | |
1841 | ||
1842 | /* Adds in the default cgroups, if they weren't specified | |
1843 | * otherwise. */ | |
1844 | ||
1845 | if ((r = unit_add_one_default_cgroup(u, NULL)) < 0) | |
1846 | return r; | |
1847 | ||
1848 | STRV_FOREACH(c, u->meta.manager->default_controllers) | |
1849 | if ((r = unit_add_one_default_cgroup(u, *c)) < 0) | |
1850 | return r; | |
1851 | ||
1852 | return 0; | |
1853 | } | |
1854 | ||
8e274523 LP |
1855 | CGroupBonding* unit_get_default_cgroup(Unit *u) { |
1856 | assert(u); | |
1857 | ||
55096547 | 1858 | return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); |
8e274523 LP |
1859 | } |
1860 | ||
f6ff8c29 LP |
1861 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
1862 | char *t; | |
1863 | int r; | |
1864 | ||
1865 | assert(u); | |
1866 | assert(type); | |
1867 | assert(_found); | |
1868 | ||
9e2f7c11 | 1869 | if (!(t = unit_name_change_suffix(u->meta.id, type))) |
f6ff8c29 LP |
1870 | return -ENOMEM; |
1871 | ||
1872 | assert(!unit_has_name(u, t)); | |
1873 | ||
398ef8ba | 1874 | r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
1875 | free(t); |
1876 | ||
9e2f7c11 | 1877 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
1878 | |
1879 | return r; | |
1880 | } | |
1881 | ||
a16e1123 LP |
1882 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
1883 | Unit *found; | |
1884 | char *t; | |
1885 | ||
1886 | assert(u); | |
1887 | assert(type); | |
1888 | assert(_found); | |
1889 | ||
1890 | if (!(t = unit_name_change_suffix(u->meta.id, type))) | |
1891 | return -ENOMEM; | |
1892 | ||
1893 | assert(!unit_has_name(u, t)); | |
1894 | ||
1895 | found = manager_get_unit(u->meta.manager, t); | |
1896 | free(t); | |
1897 | ||
1898 | if (!found) | |
1899 | return -ENOENT; | |
1900 | ||
1901 | *_found = found; | |
1902 | return 0; | |
1903 | } | |
1904 | ||
9e2f7c11 LP |
1905 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
1906 | Unit *u = userdata; | |
1907 | assert(u); | |
1908 | ||
1909 | return unit_name_to_prefix_and_instance(u->meta.id); | |
1910 | } | |
1911 | ||
1912 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
1913 | Unit *u = userdata; | |
1914 | assert(u); | |
1915 | ||
1916 | return unit_name_to_prefix(u->meta.id); | |
1917 | } | |
1918 | ||
1919 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
1920 | Unit *u = userdata; | |
1921 | char *p, *r; | |
1922 | ||
1923 | assert(u); | |
1924 | ||
1925 | if (!(p = unit_name_to_prefix(u->meta.id))) | |
1926 | return NULL; | |
1927 | ||
1928 | r = unit_name_unescape(p); | |
1929 | free(p); | |
1930 | ||
1931 | return r; | |
1932 | } | |
1933 | ||
1934 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
1935 | Unit *u = userdata; | |
1936 | assert(u); | |
1937 | ||
1938 | if (u->meta.instance) | |
1939 | return unit_name_unescape(u->meta.instance); | |
1940 | ||
1941 | return strdup(""); | |
1942 | } | |
1943 | ||
9fc50704 LP |
1944 | static char *specifier_filename(char specifier, void *data, void *userdata) { |
1945 | Unit *u = userdata; | |
1946 | assert(u); | |
1947 | ||
1948 | if (u->meta.instance) | |
1949 | return unit_name_path_unescape(u->meta.instance); | |
1950 | ||
1951 | return unit_name_to_path(u->meta.instance); | |
1952 | } | |
1953 | ||
9e2f7c11 LP |
1954 | char *unit_name_printf(Unit *u, const char* format) { |
1955 | ||
1956 | /* | |
1957 | * This will use the passed string as format string and | |
1958 | * replace the following specifiers: | |
1959 | * | |
1960 | * %n: the full id of the unit (foo@bar.waldo) | |
1961 | * %N: the id of the unit without the suffix (foo@bar) | |
1962 | * %p: the prefix (foo) | |
1963 | * %i: the instance (bar) | |
1964 | */ | |
1965 | ||
1966 | const Specifier table[] = { | |
1967 | { 'n', specifier_string, u->meta.id }, | |
1968 | { 'N', specifier_prefix_and_instance, NULL }, | |
1969 | { 'p', specifier_prefix, NULL }, | |
1970 | { 'i', specifier_string, u->meta.instance }, | |
1971 | { 0, NULL, NULL } | |
1972 | }; | |
1973 | ||
1974 | assert(u); | |
1975 | assert(format); | |
1976 | ||
1977 | return specifier_printf(format, table, u); | |
1978 | } | |
1979 | ||
1980 | char *unit_full_printf(Unit *u, const char *format) { | |
1981 | ||
1982 | /* This is similar to unit_name_printf() but also supports | |
1983 | * unescaping */ | |
1984 | ||
1985 | const Specifier table[] = { | |
1986 | { 'n', specifier_string, u->meta.id }, | |
1987 | { 'N', specifier_prefix_and_instance, NULL }, | |
1988 | { 'p', specifier_prefix, NULL }, | |
1989 | { 'P', specifier_prefix_unescaped, NULL }, | |
1990 | { 'i', specifier_string, u->meta.instance }, | |
1991 | { 'I', specifier_instance_unescaped, NULL }, | |
9fc50704 | 1992 | { 'f', specifier_filename, NULL }, |
9e2f7c11 LP |
1993 | { 0, NULL, NULL } |
1994 | }; | |
1995 | ||
1996 | assert(u); | |
1997 | assert(format); | |
1998 | ||
1999 | return specifier_printf(format, table, u); | |
2000 | } | |
2001 | ||
2002 | char **unit_full_printf_strv(Unit *u, char **l) { | |
2003 | size_t n; | |
2004 | char **r, **i, **j; | |
2005 | ||
2006 | /* Applies unit_full_printf to every entry in l */ | |
2007 | ||
2008 | assert(u); | |
2009 | ||
2010 | n = strv_length(l); | |
2011 | if (!(r = new(char*, n+1))) | |
2012 | return NULL; | |
2013 | ||
2014 | for (i = l, j = r; *i; i++, j++) | |
2015 | if (!(*j = unit_full_printf(u, *i))) | |
2016 | goto fail; | |
2017 | ||
2018 | *j = NULL; | |
2019 | return r; | |
2020 | ||
2021 | fail: | |
2022 | j--; | |
2023 | while (j >= r) | |
2024 | free(*j); | |
2025 | ||
2026 | free(r); | |
2027 | ||
2028 | return NULL; | |
2029 | } | |
2030 | ||
05e343b7 LP |
2031 | int unit_watch_bus_name(Unit *u, const char *name) { |
2032 | assert(u); | |
2033 | assert(name); | |
2034 | ||
2035 | /* Watch a specific name on the bus. We only support one unit | |
2036 | * watching each name for now. */ | |
2037 | ||
2038 | return hashmap_put(u->meta.manager->watch_bus, name, u); | |
2039 | } | |
2040 | ||
2041 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2042 | assert(u); | |
2043 | assert(name); | |
2044 | ||
2045 | hashmap_remove_value(u->meta.manager->watch_bus, name, u); | |
2046 | } | |
2047 | ||
a16e1123 LP |
2048 | bool unit_can_serialize(Unit *u) { |
2049 | assert(u); | |
2050 | ||
2051 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2052 | } | |
2053 | ||
2054 | int unit_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2055 | int r; | |
2056 | ||
2057 | assert(u); | |
2058 | assert(f); | |
2059 | assert(fds); | |
2060 | ||
2061 | if (!unit_can_serialize(u)) | |
2062 | return 0; | |
2063 | ||
2064 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
2065 | return r; | |
2066 | ||
cca098b0 LP |
2067 | if (u->meta.job) |
2068 | unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type)); | |
2069 | ||
10717a1a LP |
2070 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->meta.inactive_exit_timestamp); |
2071 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->meta.active_enter_timestamp); | |
2072 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->meta.active_exit_timestamp); | |
2073 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->meta.inactive_enter_timestamp); | |
2074 | ||
a16e1123 LP |
2075 | /* End marker */ |
2076 | fputc('\n', f); | |
2077 | return 0; | |
2078 | } | |
2079 | ||
2080 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2081 | va_list ap; | |
2082 | ||
2083 | assert(u); | |
2084 | assert(f); | |
2085 | assert(key); | |
2086 | assert(format); | |
2087 | ||
2088 | fputs(key, f); | |
2089 | fputc('=', f); | |
2090 | ||
2091 | va_start(ap, format); | |
2092 | vfprintf(f, format, ap); | |
2093 | va_end(ap); | |
2094 | ||
2095 | fputc('\n', f); | |
2096 | } | |
2097 | ||
2098 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2099 | assert(u); | |
2100 | assert(f); | |
2101 | assert(key); | |
2102 | assert(value); | |
2103 | ||
2104 | fprintf(f, "%s=%s\n", key, value); | |
2105 | } | |
2106 | ||
2107 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2108 | int r; | |
2109 | ||
2110 | assert(u); | |
2111 | assert(f); | |
2112 | assert(fds); | |
2113 | ||
2114 | if (!unit_can_serialize(u)) | |
2115 | return 0; | |
2116 | ||
2117 | for (;;) { | |
2118 | char line[1024], *l, *v; | |
2119 | size_t k; | |
2120 | ||
2121 | if (!fgets(line, sizeof(line), f)) { | |
2122 | if (feof(f)) | |
2123 | return 0; | |
2124 | return -errno; | |
2125 | } | |
2126 | ||
10f8e83c | 2127 | char_array_0(line); |
a16e1123 LP |
2128 | l = strstrip(line); |
2129 | ||
2130 | /* End marker */ | |
2131 | if (l[0] == 0) | |
2132 | return 0; | |
2133 | ||
2134 | k = strcspn(l, "="); | |
2135 | ||
2136 | if (l[k] == '=') { | |
2137 | l[k] = 0; | |
2138 | v = l+k+1; | |
2139 | } else | |
2140 | v = l+k; | |
2141 | ||
cca098b0 LP |
2142 | if (streq(l, "job")) { |
2143 | JobType type; | |
2144 | ||
2145 | if ((type = job_type_from_string(v)) < 0) | |
2146 | log_debug("Failed to parse job type value %s", v); | |
2147 | else | |
2148 | u->meta.deserialized_job = type; | |
2149 | ||
2150 | continue; | |
8aaf019b | 2151 | } else if (streq(l, "inactive-exit-timestamp")) { |
799fd0fd | 2152 | dual_timestamp_deserialize(v, &u->meta.inactive_exit_timestamp); |
8aaf019b LP |
2153 | continue; |
2154 | } else if (streq(l, "active-enter-timestamp")) { | |
799fd0fd | 2155 | dual_timestamp_deserialize(v, &u->meta.active_enter_timestamp); |
8aaf019b LP |
2156 | continue; |
2157 | } else if (streq(l, "active-exit-timestamp")) { | |
799fd0fd | 2158 | dual_timestamp_deserialize(v, &u->meta.active_exit_timestamp); |
8aaf019b LP |
2159 | continue; |
2160 | } else if (streq(l, "inactive-enter-timestamp")) { | |
799fd0fd | 2161 | dual_timestamp_deserialize(v, &u->meta.inactive_enter_timestamp); |
8aaf019b LP |
2162 | continue; |
2163 | } | |
cca098b0 | 2164 | |
a16e1123 LP |
2165 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
2166 | return r; | |
2167 | } | |
2168 | } | |
2169 | ||
6e2ef85b LP |
2170 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2171 | Unit *device; | |
2172 | char *e; | |
2173 | int r; | |
2174 | ||
2175 | assert(u); | |
2176 | ||
2177 | if (!what) | |
2178 | return 0; | |
2179 | ||
2180 | /* Adds in links to the device node that this unit is based on */ | |
2181 | ||
8407a5d0 | 2182 | if (!is_device_path(what)) |
6e2ef85b LP |
2183 | return 0; |
2184 | ||
2185 | if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) | |
2186 | return -ENOMEM; | |
2187 | ||
398ef8ba | 2188 | r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2189 | free(e); |
2190 | ||
2191 | if (r < 0) | |
2192 | return r; | |
2193 | ||
b81884e7 | 2194 | if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BIND_TO, device, true)) < 0) |
6e2ef85b LP |
2195 | return r; |
2196 | ||
2197 | if (wants) | |
2198 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
2199 | return r; | |
2200 | ||
2201 | return 0; | |
2202 | } | |
a16e1123 | 2203 | |
cca098b0 LP |
2204 | int unit_coldplug(Unit *u) { |
2205 | int r; | |
2206 | ||
2207 | assert(u); | |
2208 | ||
2209 | if (UNIT_VTABLE(u)->coldplug) | |
2210 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2211 | return r; | |
2212 | ||
2213 | if (u->meta.deserialized_job >= 0) { | |
398ef8ba | 2214 | if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL, NULL)) < 0) |
cca098b0 LP |
2215 | return r; |
2216 | ||
2217 | u->meta.deserialized_job = _JOB_TYPE_INVALID; | |
2218 | } | |
2219 | ||
2220 | return 0; | |
2221 | } | |
2222 | ||
9e58ff9c LP |
2223 | void unit_status_printf(Unit *u, const char *format, ...) { |
2224 | va_list ap; | |
2225 | ||
2226 | assert(u); | |
2227 | assert(format); | |
2228 | ||
2229 | if (!UNIT_VTABLE(u)->show_status) | |
2230 | return; | |
2231 | ||
2232 | if (u->meta.manager->running_as != MANAGER_SYSTEM) | |
2233 | return; | |
2234 | ||
2235 | if (!u->meta.manager->show_status) | |
2236 | return; | |
2237 | ||
2238 | if (!manager_is_booting_or_shutting_down(u->meta.manager)) | |
2239 | return; | |
2240 | ||
2241 | va_start(ap, format); | |
2242 | status_vprintf(format, ap); | |
2243 | va_end(ap); | |
2244 | } | |
2245 | ||
45fb0699 LP |
2246 | bool unit_need_daemon_reload(Unit *u) { |
2247 | struct stat st; | |
2248 | ||
2249 | assert(u); | |
2250 | ||
2251 | if (!u->meta.fragment_path) | |
2252 | return false; | |
2253 | ||
2254 | zero(st); | |
2255 | if (stat(u->meta.fragment_path, &st) < 0) | |
2256 | /* What, cannot access this anymore? */ | |
2257 | return true; | |
2258 | ||
2259 | return | |
2260 | u->meta.fragment_mtime && | |
2261 | timespec_load(&st.st_mtim) != u->meta.fragment_mtime; | |
2262 | } | |
2263 | ||
fdf20a31 | 2264 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2265 | assert(u); |
2266 | ||
fdf20a31 MM |
2267 | if (UNIT_VTABLE(u)->reset_failed) |
2268 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2269 | } |
2270 | ||
a7f241db LP |
2271 | Unit *unit_following(Unit *u) { |
2272 | assert(u); | |
2273 | ||
2274 | if (UNIT_VTABLE(u)->following) | |
2275 | return UNIT_VTABLE(u)->following(u); | |
2276 | ||
2277 | return NULL; | |
2278 | } | |
2279 | ||
18ffdfda LP |
2280 | bool unit_pending_inactive(Unit *u) { |
2281 | assert(u); | |
2282 | ||
2283 | /* Returns true if the unit is inactive or going down */ | |
2284 | ||
2285 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
2286 | return true; | |
2287 | ||
2288 | if (u->meta.job && u->meta.job->type == JOB_STOP) | |
2289 | return true; | |
2290 | ||
2291 | return false; | |
2292 | } | |
2293 | ||
f976f3f6 LP |
2294 | bool unit_pending_active(Unit *u) { |
2295 | assert(u); | |
2296 | ||
2297 | /* Returns true if the unit is inactive or going down */ | |
2298 | ||
2299 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2300 | return true; | |
2301 | ||
2302 | if (u->meta.job && | |
2303 | (u->meta.job->type == JOB_START || | |
2304 | u->meta.job->type == JOB_RELOAD_OR_START || | |
2305 | u->meta.job->type == JOB_RESTART)) | |
2306 | return true; | |
2307 | ||
2308 | return false; | |
2309 | } | |
2310 | ||
71fad675 LP |
2311 | UnitType unit_name_to_type(const char *n) { |
2312 | UnitType t; | |
2313 | ||
2314 | assert(n); | |
2315 | ||
2316 | for (t = 0; t < _UNIT_TYPE_MAX; t++) | |
2317 | if (endswith(n, unit_vtable[t]->suffix)) | |
2318 | return t; | |
2319 | ||
2320 | return _UNIT_TYPE_INVALID; | |
2321 | } | |
2322 | ||
b9c0d441 | 2323 | bool unit_name_is_valid(const char *n, bool template_ok) { |
71fad675 LP |
2324 | UnitType t; |
2325 | ||
2326 | t = unit_name_to_type(n); | |
2327 | if (t < 0 || t >= _UNIT_TYPE_MAX) | |
2328 | return false; | |
2329 | ||
b9c0d441 | 2330 | return unit_name_is_valid_no_type(n, template_ok); |
71fad675 LP |
2331 | } |
2332 | ||
8a0867d6 LP |
2333 | int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error) { |
2334 | assert(u); | |
2335 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
2336 | assert(m >= 0 && m < _KILL_MODE_MAX); | |
2337 | assert(signo > 0); | |
2338 | assert(signo < _NSIG); | |
2339 | ||
2340 | if (m == KILL_NONE) | |
2341 | return 0; | |
2342 | ||
2343 | if (!UNIT_VTABLE(u)->kill) | |
2344 | return -ENOTSUP; | |
2345 | ||
2346 | return UNIT_VTABLE(u)->kill(u, w, m, signo, error); | |
2347 | } | |
2348 | ||
6210e7fc LP |
2349 | |
2350 | int unit_following_set(Unit *u, Set **s) { | |
2351 | assert(u); | |
2352 | assert(s); | |
2353 | ||
2354 | if (UNIT_VTABLE(u)->following_set) | |
2355 | return UNIT_VTABLE(u)->following_set(u, s); | |
2356 | ||
2357 | *s = NULL; | |
2358 | return 0; | |
2359 | } | |
2360 | ||
94f04347 LP |
2361 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { |
2362 | [UNIT_STUB] = "stub", | |
2363 | [UNIT_LOADED] = "loaded", | |
fdf20a31 | 2364 | [UNIT_ERROR] = "error", |
00dc5d76 | 2365 | [UNIT_MERGED] = "merged", |
6daf4f90 | 2366 | [UNIT_MASKED] = "masked" |
94f04347 LP |
2367 | }; |
2368 | ||
2369 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
2370 | ||
2371 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
2372 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2373 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2374 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2375 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2376 | [UNIT_ACTIVATING] = "activating", |
2377 | [UNIT_DEACTIVATING] = "deactivating" | |
2378 | }; | |
2379 | ||
2380 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2381 | ||
2382 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2383 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2384 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 LP |
2385 | [UNIT_WANTS] = "Wants", |
2386 | [UNIT_REQUISITE] = "Requisite", | |
9e2f7c11 | 2387 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
94f04347 | 2388 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2389 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
b81884e7 | 2390 | [UNIT_BIND_TO] = "BindTo", |
94f04347 LP |
2391 | [UNIT_WANTED_BY] = "WantedBy", |
2392 | [UNIT_CONFLICTS] = "Conflicts", | |
69dd2852 | 2393 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
b81884e7 | 2394 | [UNIT_BOUND_BY] = "BoundBy", |
94f04347 LP |
2395 | [UNIT_BEFORE] = "Before", |
2396 | [UNIT_AFTER] = "After", | |
701cc384 | 2397 | [UNIT_REFERENCES] = "References", |
5de9682c LP |
2398 | [UNIT_REFERENCED_BY] = "ReferencedBy", |
2399 | [UNIT_ON_FAILURE] = "OnFailure" | |
94f04347 LP |
2400 | }; |
2401 | ||
2402 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |