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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 && | |
559 | c->std_error != EXEC_OUTPUT_KMSG && | |
560 | c->std_error != EXEC_OUTPUT_SYSLOG) | |
23a177ef LP |
561 | return 0; |
562 | ||
563 | /* If syslog or kernel logging is requested, make sure our own | |
564 | * logging daemon is run first. */ | |
565 | ||
701cc384 | 566 | if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
567 | return r; |
568 | ||
a3d4e06d | 569 | if (u->meta.manager->running_as == MANAGER_SYSTEM) |
701cc384 | 570 | if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
571 | return r; |
572 | ||
87f0e418 LP |
573 | return 0; |
574 | } | |
575 | ||
87f0e418 LP |
576 | const char *unit_description(Unit *u) { |
577 | assert(u); | |
578 | ||
579 | if (u->meta.description) | |
580 | return u->meta.description; | |
581 | ||
9f151f29 | 582 | return strna(u->meta.id); |
87f0e418 LP |
583 | } |
584 | ||
585 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
87f0e418 LP |
586 | char *t; |
587 | UnitDependency d; | |
588 | Iterator i; | |
47be870b LP |
589 | char *p2; |
590 | const char *prefix2; | |
8e274523 | 591 | CGroupBonding *b; |
173e3821 LP |
592 | char |
593 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
594 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
595 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
596 | timestamp4[FORMAT_TIMESTAMP_MAX], |
597 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 598 | Unit *following; |
87f0e418 LP |
599 | |
600 | assert(u); | |
9e2f7c11 | 601 | assert(u->meta.type >= 0); |
87f0e418 LP |
602 | |
603 | if (!prefix) | |
604 | prefix = ""; | |
47be870b LP |
605 | p2 = strappend(prefix, "\t"); |
606 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
607 | |
608 | fprintf(f, | |
40d50879 | 609 | "%s-> Unit %s:\n" |
87f0e418 | 610 | "%s\tDescription: %s\n" |
9e2f7c11 | 611 | "%s\tInstance: %s\n" |
87f0e418 | 612 | "%s\tUnit Load State: %s\n" |
2fad8195 | 613 | "%s\tUnit Active State: %s\n" |
173e3821 | 614 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 615 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 616 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 617 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 LP |
618 | "%s\tGC Check Good: %s\n" |
619 | "%s\tNeed Daemon Reload: %s\n", | |
9e2f7c11 | 620 | prefix, u->meta.id, |
87f0e418 | 621 | prefix, unit_description(u), |
9e2f7c11 | 622 | prefix, strna(u->meta.instance), |
94f04347 | 623 | prefix, unit_load_state_to_string(u->meta.load_state), |
2fad8195 | 624 | prefix, unit_active_state_to_string(unit_active_state(u)), |
871d7de4 LP |
625 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)), |
626 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)), | |
627 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)), | |
628 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)), | |
45fb0699 LP |
629 | prefix, yes_no(unit_check_gc(u)), |
630 | prefix, yes_no(unit_need_daemon_reload(u))); | |
0301abf4 | 631 | |
87f0e418 LP |
632 | SET_FOREACH(t, u->meta.names, i) |
633 | fprintf(f, "%s\tName: %s\n", prefix, t); | |
634 | ||
a7f241db LP |
635 | if ((following = unit_following(u))) |
636 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->meta.id); | |
8fe914ec | 637 | |
23a177ef LP |
638 | if (u->meta.fragment_path) |
639 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path); | |
640 | ||
faf919f1 LP |
641 | if (u->meta.job_timeout > 0) |
642 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->meta.job_timeout)); | |
643 | ||
52661efd LP |
644 | condition_dump_list(u->meta.conditions, f, prefix); |
645 | ||
87f0e418 LP |
646 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
647 | Unit *other; | |
648 | ||
87f0e418 | 649 | SET_FOREACH(other, u->meta.dependencies[d], i) |
9e2f7c11 | 650 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id); |
87f0e418 LP |
651 | } |
652 | ||
23a177ef | 653 | if (u->meta.load_state == UNIT_LOADED) { |
b0650475 | 654 | fprintf(f, |
a40eb732 | 655 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
656 | "%s\tRefuseManualStart: %s\n" |
657 | "%s\tRefuseManualStop: %s\n" | |
ead8e478 | 658 | "%s\tDefaultDependencies: %s\n", |
a40eb732 | 659 | prefix, yes_no(u->meta.stop_when_unneeded), |
b5e9dba8 LP |
660 | prefix, yes_no(u->meta.refuse_manual_start), |
661 | prefix, yes_no(u->meta.refuse_manual_stop), | |
ead8e478 | 662 | prefix, yes_no(u->meta.default_dependencies)); |
b0650475 | 663 | |
23a177ef LP |
664 | LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) |
665 | fprintf(f, "%s\tControlGroup: %s:%s\n", | |
666 | prefix, b->controller, b->path); | |
8e274523 | 667 | |
23a177ef LP |
668 | if (UNIT_VTABLE(u)->dump) |
669 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 LP |
670 | |
671 | } else if (u->meta.load_state == UNIT_MERGED) | |
672 | fprintf(f, | |
673 | "%s\tMerged into: %s\n", | |
9e2f7c11 | 674 | prefix, u->meta.merged_into->meta.id); |
fdf20a31 | 675 | else if (u->meta.load_state == UNIT_ERROR) |
8821a00f LP |
676 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->meta.load_error)); |
677 | ||
87f0e418 LP |
678 | |
679 | if (u->meta.job) | |
680 | job_dump(u->meta.job, f, prefix2); | |
681 | ||
47be870b | 682 | free(p2); |
87f0e418 LP |
683 | } |
684 | ||
685 | /* Common implementation for multiple backends */ | |
e537352b | 686 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
687 | int r; |
688 | ||
689 | assert(u); | |
23a177ef LP |
690 | |
691 | /* Load a .service file */ | |
e537352b | 692 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
693 | return r; |
694 | ||
e537352b | 695 | if (u->meta.load_state == UNIT_STUB) |
23a177ef LP |
696 | return -ENOENT; |
697 | ||
698 | /* Load drop-in directory data */ | |
699 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
700 | return r; | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | /* Common implementation for multiple backends */ | |
e537352b | 706 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 707 | int r; |
87f0e418 LP |
708 | |
709 | assert(u); | |
710 | ||
23a177ef LP |
711 | /* Same as unit_load_fragment_and_dropin(), but whether |
712 | * something can be loaded or not doesn't matter. */ | |
713 | ||
714 | /* Load a .service file */ | |
e537352b | 715 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
716 | return r; |
717 | ||
e537352b LP |
718 | if (u->meta.load_state == UNIT_STUB) |
719 | u->meta.load_state = UNIT_LOADED; | |
d46de8a1 | 720 | |
87f0e418 | 721 | /* Load drop-in directory data */ |
23a177ef | 722 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
723 | return r; |
724 | ||
23a177ef | 725 | return 0; |
87f0e418 LP |
726 | } |
727 | ||
bba34eed | 728 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
729 | assert(u); |
730 | assert(target); | |
731 | ||
732 | if (target->meta.type != UNIT_TARGET) | |
733 | return 0; | |
734 | ||
bba34eed LP |
735 | /* Only add the dependency if boths units are loaded, so that |
736 | * that loop check below is reliable */ | |
737 | if (u->meta.load_state != UNIT_LOADED || | |
738 | target->meta.load_state != UNIT_LOADED) | |
739 | return 0; | |
740 | ||
98bc2000 LP |
741 | /* Don't create loops */ |
742 | if (set_get(target->meta.dependencies[UNIT_BEFORE], u)) | |
743 | return 0; | |
744 | ||
745 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
746 | } | |
747 | ||
748 | static int unit_add_default_dependencies(Unit *u) { | |
bba34eed | 749 | Unit *target; |
98bc2000 LP |
750 | Iterator i; |
751 | int r; | |
752 | ||
753 | assert(u); | |
754 | ||
bba34eed LP |
755 | SET_FOREACH(target, u->meta.dependencies[UNIT_REQUIRED_BY], i) |
756 | if ((r = unit_add_default_target_dependency(u, target)) < 0) | |
98bc2000 LP |
757 | return r; |
758 | ||
bba34eed LP |
759 | SET_FOREACH(target, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
760 | if ((r = unit_add_default_target_dependency(u, target)) < 0) | |
98bc2000 LP |
761 | return r; |
762 | ||
bba34eed LP |
763 | SET_FOREACH(target, u->meta.dependencies[UNIT_WANTED_BY], i) |
764 | if ((r = unit_add_default_target_dependency(u, target)) < 0) | |
98bc2000 LP |
765 | return r; |
766 | ||
b81884e7 LP |
767 | SET_FOREACH(target, u->meta.dependencies[UNIT_BOUND_BY], i) |
768 | if ((r = unit_add_default_target_dependency(u, target)) < 0) | |
769 | return r; | |
770 | ||
98bc2000 LP |
771 | return 0; |
772 | } | |
773 | ||
87f0e418 LP |
774 | int unit_load(Unit *u) { |
775 | int r; | |
776 | ||
777 | assert(u); | |
778 | ||
779 | if (u->meta.in_load_queue) { | |
780 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
781 | u->meta.in_load_queue = false; | |
782 | } | |
783 | ||
e537352b LP |
784 | if (u->meta.type == _UNIT_TYPE_INVALID) |
785 | return -EINVAL; | |
786 | ||
87f0e418 LP |
787 | if (u->meta.load_state != UNIT_STUB) |
788 | return 0; | |
789 | ||
e537352b LP |
790 | if (UNIT_VTABLE(u)->load) |
791 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 792 | goto fail; |
23a177ef | 793 | |
e537352b | 794 | if (u->meta.load_state == UNIT_STUB) { |
23a177ef LP |
795 | r = -ENOENT; |
796 | goto fail; | |
797 | } | |
798 | ||
98bc2000 LP |
799 | if (u->meta.load_state == UNIT_LOADED && |
800 | u->meta.default_dependencies) | |
801 | if ((r = unit_add_default_dependencies(u)) < 0) | |
802 | goto fail; | |
803 | ||
23a177ef LP |
804 | assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into); |
805 | ||
806 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 807 | unit_add_to_gc_queue(u); |
87f0e418 | 808 | |
87f0e418 LP |
809 | return 0; |
810 | ||
811 | fail: | |
fdf20a31 | 812 | u->meta.load_state = UNIT_ERROR; |
8821a00f | 813 | u->meta.load_error = r; |
c1e1601e | 814 | unit_add_to_dbus_queue(u); |
23a177ef | 815 | |
8821a00f | 816 | log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); |
23a177ef | 817 | |
87f0e418 LP |
818 | return r; |
819 | } | |
820 | ||
821 | /* Errors: | |
d5159713 LP |
822 | * -EBADR: This unit type does not support starting. |
823 | * -EALREADY: Unit is already started. | |
824 | * -EAGAIN: An operation is already in progress. Retry later. | |
825 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
826 | */ |
827 | int unit_start(Unit *u) { | |
828 | UnitActiveState state; | |
92ab323c | 829 | Unit *following; |
87f0e418 LP |
830 | |
831 | assert(u); | |
832 | ||
6124958c LP |
833 | if (u->meta.load_state != UNIT_LOADED) |
834 | return -EINVAL; | |
835 | ||
7898b0cf LP |
836 | /* If this is already (being) started, then this will |
837 | * succeed. Note that this will even succeed if this unit is | |
838 | * not startable by the user. This is relied on to detect when | |
839 | * we need to wait for units and when waiting is finished. */ | |
87f0e418 LP |
840 | state = unit_active_state(u); |
841 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
842 | return -EALREADY; | |
843 | ||
52661efd LP |
844 | /* If the conditions failed, don't do anything at all */ |
845 | if (!condition_test_list(u->meta.conditions)) { | |
846 | log_debug("Starting of %s requested but condition failed. Ignoring.", u->meta.id); | |
847 | return -EALREADY; | |
848 | } | |
849 | ||
92ab323c LP |
850 | /* Forward to the main object, if we aren't it. */ |
851 | if ((following = unit_following(u))) { | |
852 | log_debug("Redirecting start request from %s to %s.", u->meta.id, following->meta.id); | |
853 | return unit_start(following); | |
854 | } | |
855 | ||
856 | /* If it is stopped, but we cannot start it, then fail */ | |
857 | if (!UNIT_VTABLE(u)->start) | |
858 | return -EBADR; | |
859 | ||
87f0e418 LP |
860 | /* We don't suppress calls to ->start() here when we are |
861 | * already starting, to allow this request to be used as a | |
862 | * "hurry up" call, for example when the unit is in some "auto | |
863 | * restart" state where it waits for a holdoff timer to elapse | |
864 | * before it will start again. */ | |
865 | ||
c1e1601e | 866 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
867 | |
868 | unit_status_printf(u, "Starting %s...\n", unit_description(u)); | |
87f0e418 LP |
869 | return UNIT_VTABLE(u)->start(u); |
870 | } | |
871 | ||
872 | bool unit_can_start(Unit *u) { | |
873 | assert(u); | |
874 | ||
875 | return !!UNIT_VTABLE(u)->start; | |
876 | } | |
877 | ||
2528a7a6 LP |
878 | bool unit_can_isolate(Unit *u) { |
879 | assert(u); | |
880 | ||
881 | return unit_can_start(u) && | |
882 | u->meta.allow_isolate; | |
883 | } | |
884 | ||
87f0e418 LP |
885 | /* Errors: |
886 | * -EBADR: This unit type does not support stopping. | |
887 | * -EALREADY: Unit is already stopped. | |
888 | * -EAGAIN: An operation is already in progress. Retry later. | |
889 | */ | |
890 | int unit_stop(Unit *u) { | |
891 | UnitActiveState state; | |
92ab323c | 892 | Unit *following; |
87f0e418 LP |
893 | |
894 | assert(u); | |
895 | ||
87f0e418 | 896 | state = unit_active_state(u); |
fdf20a31 | 897 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
898 | return -EALREADY; |
899 | ||
92ab323c LP |
900 | if ((following = unit_following(u))) { |
901 | log_debug("Redirecting stop request from %s to %s.", u->meta.id, following->meta.id); | |
902 | return unit_stop(following); | |
903 | } | |
904 | ||
7898b0cf LP |
905 | if (!UNIT_VTABLE(u)->stop) |
906 | return -EBADR; | |
907 | ||
c1e1601e | 908 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
909 | |
910 | unit_status_printf(u, "Stopping %s...\n", unit_description(u)); | |
87f0e418 LP |
911 | return UNIT_VTABLE(u)->stop(u); |
912 | } | |
913 | ||
914 | /* Errors: | |
915 | * -EBADR: This unit type does not support reloading. | |
916 | * -ENOEXEC: Unit is not started. | |
917 | * -EAGAIN: An operation is already in progress. Retry later. | |
918 | */ | |
919 | int unit_reload(Unit *u) { | |
920 | UnitActiveState state; | |
92ab323c | 921 | Unit *following; |
87f0e418 LP |
922 | |
923 | assert(u); | |
924 | ||
6124958c LP |
925 | if (u->meta.load_state != UNIT_LOADED) |
926 | return -EINVAL; | |
927 | ||
87f0e418 LP |
928 | if (!unit_can_reload(u)) |
929 | return -EBADR; | |
930 | ||
931 | state = unit_active_state(u); | |
e364ad06 | 932 | if (state == UNIT_RELOADING) |
87f0e418 LP |
933 | return -EALREADY; |
934 | ||
e364ad06 | 935 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
936 | return -ENOEXEC; |
937 | ||
92ab323c LP |
938 | if ((following = unit_following(u))) { |
939 | log_debug("Redirecting reload request from %s to %s.", u->meta.id, following->meta.id); | |
940 | return unit_reload(following); | |
941 | } | |
942 | ||
c1e1601e | 943 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
944 | return UNIT_VTABLE(u)->reload(u); |
945 | } | |
946 | ||
947 | bool unit_can_reload(Unit *u) { | |
948 | assert(u); | |
949 | ||
950 | if (!UNIT_VTABLE(u)->reload) | |
951 | return false; | |
952 | ||
953 | if (!UNIT_VTABLE(u)->can_reload) | |
954 | return true; | |
955 | ||
956 | return UNIT_VTABLE(u)->can_reload(u); | |
957 | } | |
958 | ||
b4a16b7b | 959 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
960 | Iterator i; |
961 | Unit *other; | |
962 | ||
963 | assert(u); | |
964 | ||
965 | /* If this service shall be shut down when unneeded then do | |
966 | * so. */ | |
967 | ||
968 | if (!u->meta.stop_when_unneeded) | |
969 | return; | |
970 | ||
971 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
972 | return; | |
973 | ||
974 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
975 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
976 | return; | |
977 | ||
9e2f7c11 | 978 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f3bff0eb LP |
979 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
980 | return; | |
981 | ||
982 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i) | |
983 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
984 | return; | |
985 | ||
b81884e7 LP |
986 | SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i) |
987 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
988 | return; | |
989 | ||
54165a39 | 990 | log_info("Service %s is not needed anymore. Stopping.", u->meta.id); |
f3bff0eb LP |
991 | |
992 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
398ef8ba | 993 | manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
994 | } |
995 | ||
87f0e418 LP |
996 | static void retroactively_start_dependencies(Unit *u) { |
997 | Iterator i; | |
998 | Unit *other; | |
999 | ||
1000 | assert(u); | |
1001 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1002 | ||
1003 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
b81884e7 LP |
1004 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1005 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
1006 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); | |
1007 | ||
1008 | SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i) | |
1009 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && | |
1010 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1011 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1012 | |
9e2f7c11 | 1013 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
b81884e7 LP |
1014 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1015 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1016 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
1017 | |
1018 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
b81884e7 LP |
1019 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1020 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1021 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1022 | |
1023 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
b81884e7 LP |
1024 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1025 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1026 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
1027 | |
1028 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) | |
b81884e7 | 1029 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
398ef8ba | 1030 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 LP |
1031 | |
1032 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i) | |
b81884e7 | 1033 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
69dd2852 | 1034 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1035 | } |
1036 | ||
1037 | static void retroactively_stop_dependencies(Unit *u) { | |
1038 | Iterator i; | |
1039 | Unit *other; | |
1040 | ||
1041 | assert(u); | |
1042 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1043 | ||
b81884e7 LP |
1044 | /* Pull down units which are bound to us recursively if enabled */ |
1045 | SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i) | |
1046 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
f14e15f8 | 1047 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
f3bff0eb LP |
1048 | |
1049 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
1050 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
87f0e418 | 1051 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1052 | unit_check_unneeded(other); |
9e2f7c11 | 1053 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1054 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1055 | unit_check_unneeded(other); |
f3bff0eb LP |
1056 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) |
1057 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
b4a16b7b | 1058 | unit_check_unneeded(other); |
f3bff0eb LP |
1059 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) |
1060 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
b4a16b7b | 1061 | unit_check_unneeded(other); |
9e2f7c11 | 1062 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1063 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1064 | unit_check_unneeded(other); |
b81884e7 LP |
1065 | SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i) |
1066 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1067 | unit_check_unneeded(other); | |
87f0e418 LP |
1068 | } |
1069 | ||
1070 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { | |
63983207 | 1071 | dual_timestamp ts; |
7e6e7b06 | 1072 | bool unexpected; |
a096ed36 | 1073 | |
87f0e418 LP |
1074 | assert(u); |
1075 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1076 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1077 | |
8e471ccd LP |
1078 | /* Note that this is called for all low-level state changes, |
1079 | * even if they might map to the same high-level | |
1080 | * UnitActiveState! That means that ns == os is OK an expected | |
1081 | * behaviour here. For example: if a mount point is remounted | |
cd6d0a45 | 1082 | * this function will be called too! */ |
87f0e418 | 1083 | |
63983207 | 1084 | dual_timestamp_get(&ts); |
173e3821 | 1085 | |
fdf20a31 | 1086 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
173e3821 | 1087 | u->meta.inactive_exit_timestamp = ts; |
fdf20a31 | 1088 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
173e3821 LP |
1089 | u->meta.inactive_enter_timestamp = ts; |
1090 | ||
87f0e418 | 1091 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 1092 | u->meta.active_enter_timestamp = ts; |
87f0e418 | 1093 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 1094 | u->meta.active_exit_timestamp = ts; |
87f0e418 | 1095 | |
fdf20a31 | 1096 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
fb385181 LP |
1097 | cgroup_bonding_trim_list(u->meta.cgroup_bondings, true); |
1098 | ||
871d7de4 | 1099 | timer_unit_notify(u, ns); |
01f78473 | 1100 | path_unit_notify(u, ns); |
871d7de4 | 1101 | |
87f0e418 | 1102 | if (u->meta.job) { |
7e6e7b06 | 1103 | unexpected = false; |
87f0e418 LP |
1104 | |
1105 | if (u->meta.job->state == JOB_WAITING) | |
1106 | ||
1107 | /* So we reached a different state for this | |
1108 | * job. Let's see if we can run it now if it | |
1109 | * failed previously due to EAGAIN. */ | |
c1e1601e | 1110 | job_add_to_run_queue(u->meta.job); |
87f0e418 | 1111 | |
b410e6b9 LP |
1112 | /* Let's check whether this state change constitutes a |
1113 | * finished job, or maybe cotradicts a running job and | |
1114 | * hence needs to invalidate jobs. */ | |
87f0e418 | 1115 | |
b410e6b9 | 1116 | switch (u->meta.job->type) { |
87f0e418 | 1117 | |
b410e6b9 LP |
1118 | case JOB_START: |
1119 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1120 | |
b410e6b9 LP |
1121 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
1122 | job_finish_and_invalidate(u->meta.job, true); | |
1123 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
1124 | unexpected = true; | |
41b02ec7 | 1125 | |
fdf20a31 MM |
1126 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
1127 | job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED); | |
b410e6b9 | 1128 | } |
87f0e418 | 1129 | |
b410e6b9 | 1130 | break; |
87f0e418 | 1131 | |
b410e6b9 LP |
1132 | case JOB_RELOAD: |
1133 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1134 | |
b410e6b9 | 1135 | if (u->meta.job->state == JOB_RUNNING) { |
a096ed36 | 1136 | if (ns == UNIT_ACTIVE) |
87f0e418 | 1137 | job_finish_and_invalidate(u->meta.job, true); |
032ff4af | 1138 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1139 | unexpected = true; |
41b02ec7 | 1140 | |
fdf20a31 MM |
1141 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
1142 | job_finish_and_invalidate(u->meta.job, ns != UNIT_FAILED); | |
a096ed36 | 1143 | } |
b410e6b9 | 1144 | } |
87f0e418 | 1145 | |
b410e6b9 | 1146 | break; |
87f0e418 | 1147 | |
b410e6b9 LP |
1148 | case JOB_STOP: |
1149 | case JOB_RESTART: | |
1150 | case JOB_TRY_RESTART: | |
87f0e418 | 1151 | |
fdf20a31 | 1152 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
b410e6b9 LP |
1153 | job_finish_and_invalidate(u->meta.job, true); |
1154 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
1155 | unexpected = true; | |
1156 | job_finish_and_invalidate(u->meta.job, false); | |
1157 | } | |
87f0e418 | 1158 | |
b410e6b9 | 1159 | break; |
87f0e418 | 1160 | |
b410e6b9 LP |
1161 | default: |
1162 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1163 | } |
87f0e418 | 1164 | |
7e6e7b06 LP |
1165 | } else |
1166 | unexpected = true; | |
1167 | ||
9f611ad8 LP |
1168 | /* If this state change happened without being requested by a |
1169 | * job, then let's retroactively start or stop | |
1170 | * dependencies. We skip that step when deserializing, since | |
1171 | * we don't want to create any additional jobs just because | |
1172 | * something is already activated. */ | |
1173 | ||
1174 | if (unexpected && u->meta.manager->n_deserializing <= 0) { | |
5ed9f5d6 | 1175 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) |
7e6e7b06 LP |
1176 | retroactively_start_dependencies(u); |
1177 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1178 | retroactively_stop_dependencies(u); | |
a096ed36 | 1179 | } |
f3bff0eb | 1180 | |
fdf20a31 | 1181 | if (ns != os && ns == UNIT_FAILED) { |
5de9682c LP |
1182 | Iterator i; |
1183 | Unit *other; | |
1184 | ||
1185 | SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i) | |
1186 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); | |
1187 | ||
fdf20a31 | 1188 | log_notice("Unit %s entered failed state.", u->meta.id); |
5de9682c LP |
1189 | } |
1190 | ||
e537352b LP |
1191 | /* Some names are special */ |
1192 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
4927fcae | 1193 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) |
e537352b LP |
1194 | /* The bus just might have become available, |
1195 | * hence try to connect to it, if we aren't | |
1196 | * yet connected. */ | |
5e8d1c9a | 1197 | bus_init(u->meta.manager); |
f278026d | 1198 | |
e537352b LP |
1199 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) |
1200 | /* The syslog daemon just might have become | |
1201 | * available, hence try to connect to it, if | |
1202 | * we aren't yet connected. */ | |
843d2643 | 1203 | log_open(); |
f278026d | 1204 | |
4927fcae | 1205 | if (u->meta.type == UNIT_SERVICE && |
cd6d0a45 | 1206 | !UNIT_IS_ACTIVE_OR_RELOADING(os)) { |
4927fcae | 1207 | /* Write audit record if we have just finished starting up */ |
e983b760 | 1208 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, true); |
cd6d0a45 LP |
1209 | u->meta.in_audit = true; |
1210 | } | |
e537352b | 1211 | |
e983b760 LP |
1212 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
1213 | manager_send_unit_plymouth(u->meta.manager, u); | |
1214 | ||
4927fcae | 1215 | } else { |
f278026d LP |
1216 | |
1217 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) | |
e537352b LP |
1218 | /* The syslog daemon might just have |
1219 | * terminated, hence try to disconnect from | |
1220 | * it. */ | |
2882c7ed | 1221 | log_close_syslog(); |
f278026d LP |
1222 | |
1223 | /* We don't care about D-Bus here, since we'll get an | |
1224 | * asynchronous notification for it anyway. */ | |
4927fcae LP |
1225 | |
1226 | if (u->meta.type == UNIT_SERVICE && | |
fdf20a31 MM |
1227 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1228 | !UNIT_IS_INACTIVE_OR_FAILED(os)) { | |
cd6d0a45 LP |
1229 | |
1230 | /* Hmm, if there was no start record written | |
1231 | * write it now, so that we always have a nice | |
1232 | * pair */ | |
1233 | if (!u->meta.in_audit) { | |
1234 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
4927fcae | 1235 | |
cd6d0a45 LP |
1236 | if (ns == UNIT_INACTIVE) |
1237 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true); | |
1238 | } else | |
1239 | /* Write audit record if we have just finished shutting down */ | |
1240 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
1241 | ||
1242 | u->meta.in_audit = false; | |
1243 | } | |
f278026d LP |
1244 | } |
1245 | ||
f3bff0eb LP |
1246 | /* Maybe we finished startup and are now ready for being |
1247 | * stopped because unneeded? */ | |
b4a16b7b | 1248 | unit_check_unneeded(u); |
c1e1601e LP |
1249 | |
1250 | unit_add_to_dbus_queue(u); | |
701cc384 | 1251 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1252 | } |
1253 | ||
acbb0225 | 1254 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1255 | struct epoll_event ev; |
1256 | ||
1257 | assert(u); | |
1258 | assert(fd >= 0); | |
acbb0225 | 1259 | assert(w); |
ea430986 | 1260 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1261 | |
1262 | zero(ev); | |
acbb0225 | 1263 | ev.data.ptr = w; |
87f0e418 LP |
1264 | ev.events = events; |
1265 | ||
acbb0225 LP |
1266 | if (epoll_ctl(u->meta.manager->epoll_fd, |
1267 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, | |
1268 | fd, | |
1269 | &ev) < 0) | |
1270 | return -errno; | |
87f0e418 | 1271 | |
acbb0225 LP |
1272 | w->fd = fd; |
1273 | w->type = WATCH_FD; | |
ea430986 | 1274 | w->data.unit = u; |
87f0e418 | 1275 | |
acbb0225 | 1276 | return 0; |
87f0e418 LP |
1277 | } |
1278 | ||
acbb0225 | 1279 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1280 | assert(u); |
acbb0225 | 1281 | assert(w); |
87f0e418 | 1282 | |
acbb0225 LP |
1283 | if (w->type == WATCH_INVALID) |
1284 | return; | |
1285 | ||
ea430986 LP |
1286 | assert(w->type == WATCH_FD); |
1287 | assert(w->data.unit == u); | |
acbb0225 LP |
1288 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
1289 | ||
1290 | w->fd = -1; | |
1291 | w->type = WATCH_INVALID; | |
ea430986 | 1292 | w->data.unit = NULL; |
87f0e418 LP |
1293 | } |
1294 | ||
1295 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1296 | assert(u); | |
1297 | assert(pid >= 1); | |
1298 | ||
05e343b7 LP |
1299 | /* Watch a specific PID. We only support one unit watching |
1300 | * each PID for now. */ | |
1301 | ||
c6c18be3 | 1302 | return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1303 | } |
1304 | ||
1305 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1306 | assert(u); | |
1307 | assert(pid >= 1); | |
1308 | ||
c6c18be3 | 1309 | hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1310 | } |
1311 | ||
acbb0225 | 1312 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1313 | struct itimerspec its; |
acbb0225 | 1314 | int flags, fd; |
87f0e418 LP |
1315 | bool ours; |
1316 | ||
1317 | assert(u); | |
acbb0225 | 1318 | assert(w); |
faf919f1 | 1319 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1320 | |
1321 | /* This will try to reuse the old timer if there is one */ | |
1322 | ||
faf919f1 LP |
1323 | if (w->type == WATCH_UNIT_TIMER) { |
1324 | assert(w->data.unit == u); | |
1325 | assert(w->fd >= 0); | |
1326 | ||
87f0e418 | 1327 | ours = false; |
acbb0225 | 1328 | fd = w->fd; |
faf919f1 LP |
1329 | } else if (w->type == WATCH_INVALID) { |
1330 | ||
87f0e418 | 1331 | ours = true; |
87f0e418 LP |
1332 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1333 | return -errno; | |
faf919f1 LP |
1334 | } else |
1335 | assert_not_reached("Invalid watch type"); | |
87f0e418 LP |
1336 | |
1337 | zero(its); | |
1338 | ||
1339 | if (delay <= 0) { | |
1340 | /* Set absolute time in the past, but not 0, since we | |
1341 | * don't want to disarm the timer */ | |
1342 | its.it_value.tv_sec = 0; | |
1343 | its.it_value.tv_nsec = 1; | |
1344 | ||
1345 | flags = TFD_TIMER_ABSTIME; | |
1346 | } else { | |
1347 | timespec_store(&its.it_value, delay); | |
1348 | flags = 0; | |
1349 | } | |
1350 | ||
1351 | /* This will also flush the elapse counter */ | |
1352 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1353 | goto fail; | |
1354 | ||
acbb0225 LP |
1355 | if (w->type == WATCH_INVALID) { |
1356 | struct epoll_event ev; | |
87f0e418 | 1357 | |
acbb0225 LP |
1358 | zero(ev); |
1359 | ev.data.ptr = w; | |
f94ea366 | 1360 | ev.events = EPOLLIN; |
acbb0225 LP |
1361 | |
1362 | if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) | |
1363 | goto fail; | |
1364 | } | |
1365 | ||
faf919f1 | 1366 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1367 | w->fd = fd; |
ea430986 | 1368 | w->data.unit = u; |
87f0e418 | 1369 | |
87f0e418 LP |
1370 | return 0; |
1371 | ||
1372 | fail: | |
1373 | if (ours) | |
ea430986 | 1374 | close_nointr_nofail(fd); |
87f0e418 LP |
1375 | |
1376 | return -errno; | |
1377 | } | |
1378 | ||
acbb0225 | 1379 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1380 | assert(u); |
acbb0225 | 1381 | assert(w); |
87f0e418 | 1382 | |
acbb0225 | 1383 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1384 | return; |
1385 | ||
faf919f1 LP |
1386 | assert(w->type == WATCH_UNIT_TIMER); |
1387 | assert(w->data.unit == u); | |
1388 | assert(w->fd >= 0); | |
acbb0225 LP |
1389 | |
1390 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
a16e1123 | 1391 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1392 | |
1393 | w->fd = -1; | |
1394 | w->type = WATCH_INVALID; | |
ea430986 | 1395 | w->data.unit = NULL; |
87f0e418 LP |
1396 | } |
1397 | ||
1398 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1399 | assert(u); | |
1400 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1401 | ||
1402 | switch (j) { | |
1403 | ||
1404 | case JOB_VERIFY_ACTIVE: | |
1405 | case JOB_START: | |
57339f47 | 1406 | case JOB_STOP: |
87f0e418 LP |
1407 | return true; |
1408 | ||
87f0e418 LP |
1409 | case JOB_RESTART: |
1410 | case JOB_TRY_RESTART: | |
1411 | return unit_can_start(u); | |
1412 | ||
1413 | case JOB_RELOAD: | |
1414 | return unit_can_reload(u); | |
1415 | ||
1416 | case JOB_RELOAD_OR_START: | |
1417 | return unit_can_reload(u) && unit_can_start(u); | |
1418 | ||
1419 | default: | |
1420 | assert_not_reached("Invalid job type"); | |
1421 | } | |
1422 | } | |
1423 | ||
701cc384 | 1424 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1425 | |
1426 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1427 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1428 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1429 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1430 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1431 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
b81884e7 | 1432 | [UNIT_BIND_TO] = UNIT_BOUND_BY, |
87f0e418 | 1433 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1434 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1435 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
b81884e7 | 1436 | [UNIT_BOUND_BY] = UNIT_BIND_TO, |
69dd2852 LP |
1437 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1438 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1439 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1440 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1441 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 LP |
1442 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
1443 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES | |
87f0e418 | 1444 | }; |
701cc384 | 1445 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1446 | |
1447 | assert(u); | |
1448 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1449 | assert(other); |
1450 | ||
9f151f29 LP |
1451 | u = unit_follow_merge(u); |
1452 | other = unit_follow_merge(other); | |
1453 | ||
87f0e418 LP |
1454 | /* We won't allow dependencies on ourselves. We will not |
1455 | * consider them an error however. */ | |
1456 | if (u == other) | |
1457 | return 0; | |
1458 | ||
5de9682c | 1459 | if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1460 | return r; |
1461 | ||
5de9682c LP |
1462 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
1463 | if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) | |
1464 | return r; | |
1465 | ||
701cc384 LP |
1466 | if (add_reference) |
1467 | if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || | |
1468 | (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
1469 | return r; | |
87f0e418 | 1470 | |
701cc384 LP |
1471 | if ((q = set_put(u->meta.dependencies[d], other)) < 0) |
1472 | return q; | |
87f0e418 | 1473 | |
5de9682c LP |
1474 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
1475 | if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) { | |
1476 | r = v; | |
1477 | goto fail; | |
1478 | } | |
701cc384 LP |
1479 | |
1480 | if (add_reference) { | |
1481 | if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) { | |
1482 | r = w; | |
1483 | goto fail; | |
1484 | } | |
1485 | ||
1486 | if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0) | |
1487 | goto fail; | |
87f0e418 LP |
1488 | } |
1489 | ||
c1e1601e | 1490 | unit_add_to_dbus_queue(u); |
87f0e418 | 1491 | return 0; |
701cc384 LP |
1492 | |
1493 | fail: | |
1494 | if (q > 0) | |
1495 | set_remove(u->meta.dependencies[d], other); | |
1496 | ||
1497 | if (v > 0) | |
1498 | set_remove(other->meta.dependencies[inverse_table[d]], u); | |
1499 | ||
1500 | if (w > 0) | |
1501 | set_remove(u->meta.dependencies[UNIT_REFERENCES], other); | |
1502 | ||
1503 | return r; | |
87f0e418 | 1504 | } |
0301abf4 | 1505 | |
2c966c03 LP |
1506 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1507 | int r; | |
1508 | ||
1509 | assert(u); | |
1510 | ||
1511 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1512 | return r; | |
1513 | ||
1514 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1515 | return r; | |
1516 | ||
1517 | return 0; | |
1518 | } | |
1519 | ||
9e2f7c11 LP |
1520 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1521 | char *s; | |
1522 | ||
1523 | assert(u); | |
1524 | assert(name || path); | |
1525 | ||
1526 | if (!name) | |
1527 | name = file_name_from_path(path); | |
1528 | ||
1529 | if (!unit_name_is_template(name)) { | |
1530 | *p = NULL; | |
1531 | return name; | |
1532 | } | |
1533 | ||
1534 | if (u->meta.instance) | |
1535 | s = unit_name_replace_instance(name, u->meta.instance); | |
1536 | else { | |
1537 | char *i; | |
1538 | ||
1539 | if (!(i = unit_name_to_prefix(u->meta.id))) | |
1540 | return NULL; | |
1541 | ||
1542 | s = unit_name_replace_instance(name, i); | |
1543 | free(i); | |
1544 | } | |
1545 | ||
1546 | if (!s) | |
1547 | return NULL; | |
1548 | ||
1549 | *p = s; | |
1550 | return s; | |
1551 | } | |
1552 | ||
701cc384 | 1553 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1554 | Unit *other; |
1555 | int r; | |
9e2f7c11 | 1556 | char *s; |
09b6b09f | 1557 | |
9e2f7c11 LP |
1558 | assert(u); |
1559 | assert(name || path); | |
09b6b09f | 1560 | |
9e2f7c11 LP |
1561 | if (!(name = resolve_template(u, name, path, &s))) |
1562 | return -ENOMEM; | |
09b6b09f | 1563 | |
398ef8ba | 1564 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1565 | goto finish; |
1566 | ||
701cc384 | 1567 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1568 | |
1569 | finish: | |
1570 | free(s); | |
1571 | return r; | |
09b6b09f LP |
1572 | } |
1573 | ||
2c966c03 LP |
1574 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1575 | Unit *other; | |
1576 | int r; | |
1577 | char *s; | |
1578 | ||
1579 | assert(u); | |
1580 | assert(name || path); | |
1581 | ||
1582 | if (!(name = resolve_template(u, name, path, &s))) | |
1583 | return -ENOMEM; | |
1584 | ||
398ef8ba | 1585 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1586 | goto finish; |
1587 | ||
1588 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1589 | ||
1590 | finish: | |
1591 | free(s); | |
1592 | return r; | |
1593 | } | |
1594 | ||
701cc384 | 1595 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1596 | Unit *other; |
1597 | int r; | |
9e2f7c11 | 1598 | char *s; |
bd77d0fc | 1599 | |
9e2f7c11 LP |
1600 | assert(u); |
1601 | assert(name || path); | |
bd77d0fc | 1602 | |
9e2f7c11 LP |
1603 | if (!(name = resolve_template(u, name, path, &s))) |
1604 | return -ENOMEM; | |
bd77d0fc | 1605 | |
398ef8ba | 1606 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1607 | goto finish; |
1608 | ||
701cc384 | 1609 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1610 | |
1611 | finish: | |
1612 | free(s); | |
1613 | return r; | |
bd77d0fc LP |
1614 | } |
1615 | ||
2c966c03 LP |
1616 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1617 | Unit *other; | |
1618 | int r; | |
1619 | char *s; | |
1620 | ||
1621 | assert(u); | |
1622 | assert(name || path); | |
1623 | ||
1624 | if (!(name = resolve_template(u, name, path, &s))) | |
1625 | return -ENOMEM; | |
1626 | ||
398ef8ba | 1627 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1628 | goto finish; |
1629 | ||
1630 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1631 | goto finish; | |
1632 | ||
1633 | finish: | |
1634 | free(s); | |
1635 | return r; | |
1636 | } | |
1637 | ||
0301abf4 LP |
1638 | int set_unit_path(const char *p) { |
1639 | char *cwd, *c; | |
1640 | int r; | |
1641 | ||
1642 | /* This is mostly for debug purposes */ | |
1643 | ||
1644 | if (path_is_absolute(p)) { | |
1645 | if (!(c = strdup(p))) | |
1646 | return -ENOMEM; | |
1647 | } else { | |
1648 | if (!(cwd = get_current_dir_name())) | |
1649 | return -errno; | |
1650 | ||
1651 | r = asprintf(&c, "%s/%s", cwd, p); | |
1652 | free(cwd); | |
1653 | ||
1654 | if (r < 0) | |
1655 | return -ENOMEM; | |
1656 | } | |
1657 | ||
036643a2 | 1658 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1659 | r = -errno; |
1660 | free(c); | |
1661 | return r; | |
1662 | } | |
1663 | ||
1664 | return 0; | |
1665 | } | |
88066b3a | 1666 | |
ea430986 LP |
1667 | char *unit_dbus_path(Unit *u) { |
1668 | char *p, *e; | |
1669 | ||
1670 | assert(u); | |
1671 | ||
04ade7d2 LP |
1672 | if (!u->meta.id) |
1673 | return NULL; | |
1674 | ||
9e2f7c11 | 1675 | if (!(e = bus_path_escape(u->meta.id))) |
ea430986 LP |
1676 | return NULL; |
1677 | ||
35d2e7ec | 1678 | p = strappend("/org/freedesktop/systemd1/unit/", e); |
ea430986 | 1679 | free(e); |
35d2e7ec | 1680 | |
ea430986 LP |
1681 | return p; |
1682 | } | |
1683 | ||
8e274523 | 1684 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
8e274523 LP |
1685 | int r; |
1686 | ||
1687 | assert(u); | |
1688 | assert(b); | |
35d2e7ec | 1689 | |
8e274523 LP |
1690 | assert(b->path); |
1691 | ||
35d2e7ec LP |
1692 | if (!b->controller) |
1693 | if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) | |
1694 | return -ENOMEM; | |
1695 | ||
8e274523 LP |
1696 | /* Ensure this hasn't been added yet */ |
1697 | assert(!b->unit); | |
1698 | ||
d686d8a9 LP |
1699 | if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
1700 | CGroupBonding *l; | |
8e274523 | 1701 | |
d686d8a9 LP |
1702 | l = hashmap_get(u->meta.manager->cgroup_bondings, b->path); |
1703 | LIST_PREPEND(CGroupBonding, by_path, l, b); | |
1704 | ||
1705 | if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) { | |
1706 | LIST_REMOVE(CGroupBonding, by_path, l, b); | |
1707 | return r; | |
1708 | } | |
8e274523 LP |
1709 | } |
1710 | ||
1711 | LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b); | |
1712 | b->unit = u; | |
1713 | ||
1714 | return 0; | |
1715 | } | |
1716 | ||
013b87c0 LP |
1717 | static char *default_cgroup_path(Unit *u) { |
1718 | char *p; | |
4f2d528d | 1719 | int r; |
013b87c0 LP |
1720 | |
1721 | assert(u); | |
1722 | ||
4f2d528d LP |
1723 | if (u->meta.instance) { |
1724 | char *t; | |
013b87c0 | 1725 | |
4f2d528d LP |
1726 | if (!(t = unit_name_template(u->meta.id))) |
1727 | return NULL; | |
1728 | ||
1729 | r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance); | |
1730 | free(t); | |
1731 | } else | |
1732 | r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id); | |
1733 | ||
1734 | return r < 0 ? NULL : p; | |
013b87c0 LP |
1735 | } |
1736 | ||
8e274523 | 1737 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
013b87c0 LP |
1738 | char *controller = NULL, *path = NULL; |
1739 | CGroupBonding *b = NULL; | |
8e274523 LP |
1740 | int r; |
1741 | ||
1742 | assert(u); | |
1743 | assert(name); | |
1744 | ||
35d2e7ec LP |
1745 | if ((r = cg_split_spec(name, &controller, &path)) < 0) |
1746 | return r; | |
8e274523 | 1747 | |
35d2e7ec LP |
1748 | if (!path) |
1749 | path = default_cgroup_path(u); | |
013b87c0 | 1750 | |
35d2e7ec | 1751 | if (!controller) |
55096547 | 1752 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
013b87c0 | 1753 | |
35d2e7ec LP |
1754 | if (!path || !controller) { |
1755 | free(path); | |
1756 | free(controller); | |
1757 | ||
1758 | return -ENOMEM; | |
8e274523 LP |
1759 | } |
1760 | ||
013b87c0 LP |
1761 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) { |
1762 | r = -EEXIST; | |
1763 | goto fail; | |
1764 | } | |
8e274523 | 1765 | |
013b87c0 | 1766 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1767 | r = -ENOMEM; |
1768 | goto fail; | |
1769 | } | |
1770 | ||
013b87c0 LP |
1771 | b->controller = controller; |
1772 | b->path = path; | |
d686d8a9 | 1773 | b->ours = false; |
8e274523 LP |
1774 | |
1775 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1776 | goto fail; | |
1777 | ||
1778 | return 0; | |
1779 | ||
1780 | fail: | |
013b87c0 LP |
1781 | free(path); |
1782 | free(controller); | |
8e274523 LP |
1783 | free(b); |
1784 | ||
1785 | return r; | |
1786 | } | |
1787 | ||
06d4c99a | 1788 | static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
d686d8a9 | 1789 | CGroupBonding *b = NULL; |
8e274523 LP |
1790 | int r = -ENOMEM; |
1791 | ||
1792 | assert(u); | |
1793 | ||
06d4c99a LP |
1794 | if (!controller) |
1795 | controller = SYSTEMD_CGROUP_CONTROLLER; | |
8e274523 | 1796 | |
06d4c99a LP |
1797 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) |
1798 | return 0; | |
8e274523 | 1799 | |
06d4c99a LP |
1800 | if (!(b = new0(CGroupBonding, 1))) |
1801 | return -ENOMEM; | |
8e274523 | 1802 | |
06d4c99a LP |
1803 | if (!(b->controller = strdup(controller))) |
1804 | goto fail; | |
d686d8a9 | 1805 | |
06d4c99a LP |
1806 | if (!(b->path = default_cgroup_path(u))) |
1807 | goto fail; | |
d686d8a9 | 1808 | |
06d4c99a LP |
1809 | b->ours = true; |
1810 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
d686d8a9 | 1811 | |
06d4c99a LP |
1812 | if ((r = unit_add_cgroup(u, b)) < 0) |
1813 | goto fail; | |
8e274523 LP |
1814 | |
1815 | return 0; | |
1816 | ||
1817 | fail: | |
06d4c99a LP |
1818 | free(b->path); |
1819 | free(b->controller); | |
1820 | free(b); | |
8e274523 LP |
1821 | |
1822 | return r; | |
1823 | } | |
1824 | ||
06d4c99a LP |
1825 | int unit_add_default_cgroups(Unit *u) { |
1826 | char **c; | |
1827 | int r; | |
1828 | assert(u); | |
1829 | ||
1830 | /* Adds in the default cgroups, if they weren't specified | |
1831 | * otherwise. */ | |
1832 | ||
1833 | if ((r = unit_add_one_default_cgroup(u, NULL)) < 0) | |
1834 | return r; | |
1835 | ||
1836 | STRV_FOREACH(c, u->meta.manager->default_controllers) | |
1837 | if ((r = unit_add_one_default_cgroup(u, *c)) < 0) | |
1838 | return r; | |
1839 | ||
1840 | return 0; | |
1841 | } | |
1842 | ||
8e274523 LP |
1843 | CGroupBonding* unit_get_default_cgroup(Unit *u) { |
1844 | assert(u); | |
1845 | ||
55096547 | 1846 | return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); |
8e274523 LP |
1847 | } |
1848 | ||
f6ff8c29 LP |
1849 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
1850 | char *t; | |
1851 | int r; | |
1852 | ||
1853 | assert(u); | |
1854 | assert(type); | |
1855 | assert(_found); | |
1856 | ||
9e2f7c11 | 1857 | if (!(t = unit_name_change_suffix(u->meta.id, type))) |
f6ff8c29 LP |
1858 | return -ENOMEM; |
1859 | ||
1860 | assert(!unit_has_name(u, t)); | |
1861 | ||
398ef8ba | 1862 | r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
1863 | free(t); |
1864 | ||
9e2f7c11 | 1865 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
1866 | |
1867 | return r; | |
1868 | } | |
1869 | ||
a16e1123 LP |
1870 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
1871 | Unit *found; | |
1872 | char *t; | |
1873 | ||
1874 | assert(u); | |
1875 | assert(type); | |
1876 | assert(_found); | |
1877 | ||
1878 | if (!(t = unit_name_change_suffix(u->meta.id, type))) | |
1879 | return -ENOMEM; | |
1880 | ||
1881 | assert(!unit_has_name(u, t)); | |
1882 | ||
1883 | found = manager_get_unit(u->meta.manager, t); | |
1884 | free(t); | |
1885 | ||
1886 | if (!found) | |
1887 | return -ENOENT; | |
1888 | ||
1889 | *_found = found; | |
1890 | return 0; | |
1891 | } | |
1892 | ||
9e2f7c11 LP |
1893 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
1894 | Unit *u = userdata; | |
1895 | assert(u); | |
1896 | ||
1897 | return unit_name_to_prefix_and_instance(u->meta.id); | |
1898 | } | |
1899 | ||
1900 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
1901 | Unit *u = userdata; | |
1902 | assert(u); | |
1903 | ||
1904 | return unit_name_to_prefix(u->meta.id); | |
1905 | } | |
1906 | ||
1907 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
1908 | Unit *u = userdata; | |
1909 | char *p, *r; | |
1910 | ||
1911 | assert(u); | |
1912 | ||
1913 | if (!(p = unit_name_to_prefix(u->meta.id))) | |
1914 | return NULL; | |
1915 | ||
1916 | r = unit_name_unescape(p); | |
1917 | free(p); | |
1918 | ||
1919 | return r; | |
1920 | } | |
1921 | ||
1922 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
1923 | Unit *u = userdata; | |
1924 | assert(u); | |
1925 | ||
1926 | if (u->meta.instance) | |
1927 | return unit_name_unescape(u->meta.instance); | |
1928 | ||
1929 | return strdup(""); | |
1930 | } | |
1931 | ||
9fc50704 LP |
1932 | static char *specifier_filename(char specifier, void *data, void *userdata) { |
1933 | Unit *u = userdata; | |
1934 | assert(u); | |
1935 | ||
1936 | if (u->meta.instance) | |
1937 | return unit_name_path_unescape(u->meta.instance); | |
1938 | ||
1939 | return unit_name_to_path(u->meta.instance); | |
1940 | } | |
1941 | ||
9e2f7c11 LP |
1942 | char *unit_name_printf(Unit *u, const char* format) { |
1943 | ||
1944 | /* | |
1945 | * This will use the passed string as format string and | |
1946 | * replace the following specifiers: | |
1947 | * | |
1948 | * %n: the full id of the unit (foo@bar.waldo) | |
1949 | * %N: the id of the unit without the suffix (foo@bar) | |
1950 | * %p: the prefix (foo) | |
1951 | * %i: the instance (bar) | |
1952 | */ | |
1953 | ||
1954 | const Specifier table[] = { | |
1955 | { 'n', specifier_string, u->meta.id }, | |
1956 | { 'N', specifier_prefix_and_instance, NULL }, | |
1957 | { 'p', specifier_prefix, NULL }, | |
1958 | { 'i', specifier_string, u->meta.instance }, | |
1959 | { 0, NULL, NULL } | |
1960 | }; | |
1961 | ||
1962 | assert(u); | |
1963 | assert(format); | |
1964 | ||
1965 | return specifier_printf(format, table, u); | |
1966 | } | |
1967 | ||
1968 | char *unit_full_printf(Unit *u, const char *format) { | |
1969 | ||
1970 | /* This is similar to unit_name_printf() but also supports | |
1971 | * unescaping */ | |
1972 | ||
1973 | const Specifier table[] = { | |
1974 | { 'n', specifier_string, u->meta.id }, | |
1975 | { 'N', specifier_prefix_and_instance, NULL }, | |
1976 | { 'p', specifier_prefix, NULL }, | |
1977 | { 'P', specifier_prefix_unescaped, NULL }, | |
1978 | { 'i', specifier_string, u->meta.instance }, | |
1979 | { 'I', specifier_instance_unescaped, NULL }, | |
9fc50704 | 1980 | { 'f', specifier_filename, NULL }, |
9e2f7c11 LP |
1981 | { 0, NULL, NULL } |
1982 | }; | |
1983 | ||
1984 | assert(u); | |
1985 | assert(format); | |
1986 | ||
1987 | return specifier_printf(format, table, u); | |
1988 | } | |
1989 | ||
1990 | char **unit_full_printf_strv(Unit *u, char **l) { | |
1991 | size_t n; | |
1992 | char **r, **i, **j; | |
1993 | ||
1994 | /* Applies unit_full_printf to every entry in l */ | |
1995 | ||
1996 | assert(u); | |
1997 | ||
1998 | n = strv_length(l); | |
1999 | if (!(r = new(char*, n+1))) | |
2000 | return NULL; | |
2001 | ||
2002 | for (i = l, j = r; *i; i++, j++) | |
2003 | if (!(*j = unit_full_printf(u, *i))) | |
2004 | goto fail; | |
2005 | ||
2006 | *j = NULL; | |
2007 | return r; | |
2008 | ||
2009 | fail: | |
2010 | j--; | |
2011 | while (j >= r) | |
2012 | free(*j); | |
2013 | ||
2014 | free(r); | |
2015 | ||
2016 | return NULL; | |
2017 | } | |
2018 | ||
05e343b7 LP |
2019 | int unit_watch_bus_name(Unit *u, const char *name) { |
2020 | assert(u); | |
2021 | assert(name); | |
2022 | ||
2023 | /* Watch a specific name on the bus. We only support one unit | |
2024 | * watching each name for now. */ | |
2025 | ||
2026 | return hashmap_put(u->meta.manager->watch_bus, name, u); | |
2027 | } | |
2028 | ||
2029 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2030 | assert(u); | |
2031 | assert(name); | |
2032 | ||
2033 | hashmap_remove_value(u->meta.manager->watch_bus, name, u); | |
2034 | } | |
2035 | ||
a16e1123 LP |
2036 | bool unit_can_serialize(Unit *u) { |
2037 | assert(u); | |
2038 | ||
2039 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2040 | } | |
2041 | ||
2042 | int unit_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2043 | int r; | |
2044 | ||
2045 | assert(u); | |
2046 | assert(f); | |
2047 | assert(fds); | |
2048 | ||
2049 | if (!unit_can_serialize(u)) | |
2050 | return 0; | |
2051 | ||
2052 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
2053 | return r; | |
2054 | ||
cca098b0 LP |
2055 | if (u->meta.job) |
2056 | unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type)); | |
2057 | ||
10717a1a LP |
2058 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->meta.inactive_exit_timestamp); |
2059 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->meta.active_enter_timestamp); | |
2060 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->meta.active_exit_timestamp); | |
2061 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->meta.inactive_enter_timestamp); | |
2062 | ||
a16e1123 LP |
2063 | /* End marker */ |
2064 | fputc('\n', f); | |
2065 | return 0; | |
2066 | } | |
2067 | ||
2068 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2069 | va_list ap; | |
2070 | ||
2071 | assert(u); | |
2072 | assert(f); | |
2073 | assert(key); | |
2074 | assert(format); | |
2075 | ||
2076 | fputs(key, f); | |
2077 | fputc('=', f); | |
2078 | ||
2079 | va_start(ap, format); | |
2080 | vfprintf(f, format, ap); | |
2081 | va_end(ap); | |
2082 | ||
2083 | fputc('\n', f); | |
2084 | } | |
2085 | ||
2086 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2087 | assert(u); | |
2088 | assert(f); | |
2089 | assert(key); | |
2090 | assert(value); | |
2091 | ||
2092 | fprintf(f, "%s=%s\n", key, value); | |
2093 | } | |
2094 | ||
2095 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2096 | int r; | |
2097 | ||
2098 | assert(u); | |
2099 | assert(f); | |
2100 | assert(fds); | |
2101 | ||
2102 | if (!unit_can_serialize(u)) | |
2103 | return 0; | |
2104 | ||
2105 | for (;;) { | |
2106 | char line[1024], *l, *v; | |
2107 | size_t k; | |
2108 | ||
2109 | if (!fgets(line, sizeof(line), f)) { | |
2110 | if (feof(f)) | |
2111 | return 0; | |
2112 | return -errno; | |
2113 | } | |
2114 | ||
10f8e83c | 2115 | char_array_0(line); |
a16e1123 LP |
2116 | l = strstrip(line); |
2117 | ||
2118 | /* End marker */ | |
2119 | if (l[0] == 0) | |
2120 | return 0; | |
2121 | ||
2122 | k = strcspn(l, "="); | |
2123 | ||
2124 | if (l[k] == '=') { | |
2125 | l[k] = 0; | |
2126 | v = l+k+1; | |
2127 | } else | |
2128 | v = l+k; | |
2129 | ||
cca098b0 LP |
2130 | if (streq(l, "job")) { |
2131 | JobType type; | |
2132 | ||
2133 | if ((type = job_type_from_string(v)) < 0) | |
2134 | log_debug("Failed to parse job type value %s", v); | |
2135 | else | |
2136 | u->meta.deserialized_job = type; | |
2137 | ||
2138 | continue; | |
8aaf019b | 2139 | } else if (streq(l, "inactive-exit-timestamp")) { |
799fd0fd | 2140 | dual_timestamp_deserialize(v, &u->meta.inactive_exit_timestamp); |
8aaf019b LP |
2141 | continue; |
2142 | } else if (streq(l, "active-enter-timestamp")) { | |
799fd0fd | 2143 | dual_timestamp_deserialize(v, &u->meta.active_enter_timestamp); |
8aaf019b LP |
2144 | continue; |
2145 | } else if (streq(l, "active-exit-timestamp")) { | |
799fd0fd | 2146 | dual_timestamp_deserialize(v, &u->meta.active_exit_timestamp); |
8aaf019b LP |
2147 | continue; |
2148 | } else if (streq(l, "inactive-enter-timestamp")) { | |
799fd0fd | 2149 | dual_timestamp_deserialize(v, &u->meta.inactive_enter_timestamp); |
8aaf019b LP |
2150 | continue; |
2151 | } | |
cca098b0 | 2152 | |
a16e1123 LP |
2153 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
2154 | return r; | |
2155 | } | |
2156 | } | |
2157 | ||
6e2ef85b LP |
2158 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2159 | Unit *device; | |
2160 | char *e; | |
2161 | int r; | |
2162 | ||
2163 | assert(u); | |
2164 | ||
2165 | if (!what) | |
2166 | return 0; | |
2167 | ||
2168 | /* Adds in links to the device node that this unit is based on */ | |
2169 | ||
8407a5d0 | 2170 | if (!is_device_path(what)) |
6e2ef85b LP |
2171 | return 0; |
2172 | ||
2173 | if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) | |
2174 | return -ENOMEM; | |
2175 | ||
398ef8ba | 2176 | r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2177 | free(e); |
2178 | ||
2179 | if (r < 0) | |
2180 | return r; | |
2181 | ||
b81884e7 | 2182 | if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BIND_TO, device, true)) < 0) |
6e2ef85b LP |
2183 | return r; |
2184 | ||
2185 | if (wants) | |
2186 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
2187 | return r; | |
2188 | ||
2189 | return 0; | |
2190 | } | |
a16e1123 | 2191 | |
cca098b0 LP |
2192 | int unit_coldplug(Unit *u) { |
2193 | int r; | |
2194 | ||
2195 | assert(u); | |
2196 | ||
2197 | if (UNIT_VTABLE(u)->coldplug) | |
2198 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2199 | return r; | |
2200 | ||
2201 | if (u->meta.deserialized_job >= 0) { | |
398ef8ba | 2202 | if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL, NULL)) < 0) |
cca098b0 LP |
2203 | return r; |
2204 | ||
2205 | u->meta.deserialized_job = _JOB_TYPE_INVALID; | |
2206 | } | |
2207 | ||
2208 | return 0; | |
2209 | } | |
2210 | ||
9e58ff9c LP |
2211 | void unit_status_printf(Unit *u, const char *format, ...) { |
2212 | va_list ap; | |
2213 | ||
2214 | assert(u); | |
2215 | assert(format); | |
2216 | ||
2217 | if (!UNIT_VTABLE(u)->show_status) | |
2218 | return; | |
2219 | ||
2220 | if (u->meta.manager->running_as != MANAGER_SYSTEM) | |
2221 | return; | |
2222 | ||
2223 | if (!u->meta.manager->show_status) | |
2224 | return; | |
2225 | ||
2226 | if (!manager_is_booting_or_shutting_down(u->meta.manager)) | |
2227 | return; | |
2228 | ||
2229 | va_start(ap, format); | |
2230 | status_vprintf(format, ap); | |
2231 | va_end(ap); | |
2232 | } | |
2233 | ||
45fb0699 LP |
2234 | bool unit_need_daemon_reload(Unit *u) { |
2235 | struct stat st; | |
2236 | ||
2237 | assert(u); | |
2238 | ||
2239 | if (!u->meta.fragment_path) | |
2240 | return false; | |
2241 | ||
2242 | zero(st); | |
2243 | if (stat(u->meta.fragment_path, &st) < 0) | |
2244 | /* What, cannot access this anymore? */ | |
2245 | return true; | |
2246 | ||
2247 | return | |
2248 | u->meta.fragment_mtime && | |
2249 | timespec_load(&st.st_mtim) != u->meta.fragment_mtime; | |
2250 | } | |
2251 | ||
fdf20a31 | 2252 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2253 | assert(u); |
2254 | ||
fdf20a31 MM |
2255 | if (UNIT_VTABLE(u)->reset_failed) |
2256 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2257 | } |
2258 | ||
a7f241db LP |
2259 | Unit *unit_following(Unit *u) { |
2260 | assert(u); | |
2261 | ||
2262 | if (UNIT_VTABLE(u)->following) | |
2263 | return UNIT_VTABLE(u)->following(u); | |
2264 | ||
2265 | return NULL; | |
2266 | } | |
2267 | ||
18ffdfda LP |
2268 | bool unit_pending_inactive(Unit *u) { |
2269 | assert(u); | |
2270 | ||
2271 | /* Returns true if the unit is inactive or going down */ | |
2272 | ||
2273 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
2274 | return true; | |
2275 | ||
2276 | if (u->meta.job && u->meta.job->type == JOB_STOP) | |
2277 | return true; | |
2278 | ||
2279 | return false; | |
2280 | } | |
2281 | ||
f976f3f6 LP |
2282 | bool unit_pending_active(Unit *u) { |
2283 | assert(u); | |
2284 | ||
2285 | /* Returns true if the unit is inactive or going down */ | |
2286 | ||
2287 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2288 | return true; | |
2289 | ||
2290 | if (u->meta.job && | |
2291 | (u->meta.job->type == JOB_START || | |
2292 | u->meta.job->type == JOB_RELOAD_OR_START || | |
2293 | u->meta.job->type == JOB_RESTART)) | |
2294 | return true; | |
2295 | ||
2296 | return false; | |
2297 | } | |
2298 | ||
71fad675 LP |
2299 | UnitType unit_name_to_type(const char *n) { |
2300 | UnitType t; | |
2301 | ||
2302 | assert(n); | |
2303 | ||
2304 | for (t = 0; t < _UNIT_TYPE_MAX; t++) | |
2305 | if (endswith(n, unit_vtable[t]->suffix)) | |
2306 | return t; | |
2307 | ||
2308 | return _UNIT_TYPE_INVALID; | |
2309 | } | |
2310 | ||
b9c0d441 | 2311 | bool unit_name_is_valid(const char *n, bool template_ok) { |
71fad675 LP |
2312 | UnitType t; |
2313 | ||
2314 | t = unit_name_to_type(n); | |
2315 | if (t < 0 || t >= _UNIT_TYPE_MAX) | |
2316 | return false; | |
2317 | ||
b9c0d441 | 2318 | return unit_name_is_valid_no_type(n, template_ok); |
71fad675 LP |
2319 | } |
2320 | ||
8a0867d6 LP |
2321 | int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error) { |
2322 | assert(u); | |
2323 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
2324 | assert(m >= 0 && m < _KILL_MODE_MAX); | |
2325 | assert(signo > 0); | |
2326 | assert(signo < _NSIG); | |
2327 | ||
2328 | if (m == KILL_NONE) | |
2329 | return 0; | |
2330 | ||
2331 | if (!UNIT_VTABLE(u)->kill) | |
2332 | return -ENOTSUP; | |
2333 | ||
2334 | return UNIT_VTABLE(u)->kill(u, w, m, signo, error); | |
2335 | } | |
2336 | ||
6210e7fc LP |
2337 | |
2338 | int unit_following_set(Unit *u, Set **s) { | |
2339 | assert(u); | |
2340 | assert(s); | |
2341 | ||
2342 | if (UNIT_VTABLE(u)->following_set) | |
2343 | return UNIT_VTABLE(u)->following_set(u, s); | |
2344 | ||
2345 | *s = NULL; | |
2346 | return 0; | |
2347 | } | |
2348 | ||
94f04347 LP |
2349 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { |
2350 | [UNIT_STUB] = "stub", | |
2351 | [UNIT_LOADED] = "loaded", | |
fdf20a31 | 2352 | [UNIT_ERROR] = "error", |
00dc5d76 | 2353 | [UNIT_MERGED] = "merged", |
6daf4f90 | 2354 | [UNIT_MASKED] = "masked" |
94f04347 LP |
2355 | }; |
2356 | ||
2357 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
2358 | ||
2359 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
2360 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2361 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2362 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2363 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2364 | [UNIT_ACTIVATING] = "activating", |
2365 | [UNIT_DEACTIVATING] = "deactivating" | |
2366 | }; | |
2367 | ||
2368 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2369 | ||
2370 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2371 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2372 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 LP |
2373 | [UNIT_WANTS] = "Wants", |
2374 | [UNIT_REQUISITE] = "Requisite", | |
9e2f7c11 | 2375 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
94f04347 | 2376 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2377 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
b81884e7 | 2378 | [UNIT_BIND_TO] = "BindTo", |
94f04347 LP |
2379 | [UNIT_WANTED_BY] = "WantedBy", |
2380 | [UNIT_CONFLICTS] = "Conflicts", | |
69dd2852 | 2381 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
b81884e7 | 2382 | [UNIT_BOUND_BY] = "BoundBy", |
94f04347 LP |
2383 | [UNIT_BEFORE] = "Before", |
2384 | [UNIT_AFTER] = "After", | |
701cc384 | 2385 | [UNIT_REFERENCES] = "References", |
5de9682c LP |
2386 | [UNIT_REFERENCED_BY] = "ReferencedBy", |
2387 | [UNIT_ON_FAILURE] = "OnFailure" | |
94f04347 LP |
2388 | }; |
2389 | ||
2390 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |