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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 | ||
2791a8f8 LP |
650 | if (dual_timestamp_is_set(&u->meta.condition_timestamp)) |
651 | fprintf(f, | |
652 | "%s\tCondition Timestamp: %s\n" | |
653 | "%s\tCondition Result: %s\n", | |
654 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.condition_timestamp.realtime)), | |
655 | prefix, yes_no(u->meta.condition_result)); | |
656 | ||
87f0e418 LP |
657 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
658 | Unit *other; | |
659 | ||
87f0e418 | 660 | SET_FOREACH(other, u->meta.dependencies[d], i) |
9e2f7c11 | 661 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id); |
87f0e418 LP |
662 | } |
663 | ||
23a177ef | 664 | if (u->meta.load_state == UNIT_LOADED) { |
b0650475 | 665 | fprintf(f, |
a40eb732 | 666 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
667 | "%s\tRefuseManualStart: %s\n" |
668 | "%s\tRefuseManualStop: %s\n" | |
ead8e478 | 669 | "%s\tDefaultDependencies: %s\n", |
a40eb732 | 670 | prefix, yes_no(u->meta.stop_when_unneeded), |
b5e9dba8 LP |
671 | prefix, yes_no(u->meta.refuse_manual_start), |
672 | prefix, yes_no(u->meta.refuse_manual_stop), | |
ead8e478 | 673 | prefix, yes_no(u->meta.default_dependencies)); |
b0650475 | 674 | |
23a177ef LP |
675 | LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) |
676 | fprintf(f, "%s\tControlGroup: %s:%s\n", | |
677 | prefix, b->controller, b->path); | |
8e274523 | 678 | |
23a177ef LP |
679 | if (UNIT_VTABLE(u)->dump) |
680 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 LP |
681 | |
682 | } else if (u->meta.load_state == UNIT_MERGED) | |
683 | fprintf(f, | |
684 | "%s\tMerged into: %s\n", | |
9e2f7c11 | 685 | prefix, u->meta.merged_into->meta.id); |
fdf20a31 | 686 | else if (u->meta.load_state == UNIT_ERROR) |
8821a00f LP |
687 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->meta.load_error)); |
688 | ||
87f0e418 LP |
689 | |
690 | if (u->meta.job) | |
691 | job_dump(u->meta.job, f, prefix2); | |
692 | ||
47be870b | 693 | free(p2); |
87f0e418 LP |
694 | } |
695 | ||
696 | /* Common implementation for multiple backends */ | |
e537352b | 697 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
698 | int r; |
699 | ||
700 | assert(u); | |
23a177ef LP |
701 | |
702 | /* Load a .service file */ | |
e537352b | 703 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
704 | return r; |
705 | ||
e537352b | 706 | if (u->meta.load_state == UNIT_STUB) |
23a177ef LP |
707 | return -ENOENT; |
708 | ||
709 | /* Load drop-in directory data */ | |
710 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
711 | return r; | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | /* Common implementation for multiple backends */ | |
e537352b | 717 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 718 | int r; |
87f0e418 LP |
719 | |
720 | assert(u); | |
721 | ||
23a177ef LP |
722 | /* Same as unit_load_fragment_and_dropin(), but whether |
723 | * something can be loaded or not doesn't matter. */ | |
724 | ||
725 | /* Load a .service file */ | |
e537352b | 726 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
727 | return r; |
728 | ||
e537352b LP |
729 | if (u->meta.load_state == UNIT_STUB) |
730 | u->meta.load_state = UNIT_LOADED; | |
d46de8a1 | 731 | |
87f0e418 | 732 | /* Load drop-in directory data */ |
23a177ef | 733 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
734 | return r; |
735 | ||
23a177ef | 736 | return 0; |
87f0e418 LP |
737 | } |
738 | ||
bba34eed | 739 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
740 | assert(u); |
741 | assert(target); | |
742 | ||
743 | if (target->meta.type != UNIT_TARGET) | |
744 | return 0; | |
745 | ||
35b8ca3a | 746 | /* Only add the dependency if both units are loaded, so that |
bba34eed LP |
747 | * that loop check below is reliable */ |
748 | if (u->meta.load_state != UNIT_LOADED || | |
749 | target->meta.load_state != UNIT_LOADED) | |
750 | return 0; | |
751 | ||
21256a2b LP |
752 | /* If either side wants no automatic dependencies, then let's |
753 | * skip this */ | |
754 | if (!u->meta.default_dependencies || | |
755 | target->meta.default_dependencies) | |
756 | return 0; | |
757 | ||
98bc2000 LP |
758 | /* Don't create loops */ |
759 | if (set_get(target->meta.dependencies[UNIT_BEFORE], u)) | |
760 | return 0; | |
761 | ||
762 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
763 | } | |
764 | ||
765 | static int unit_add_default_dependencies(Unit *u) { | |
21256a2b LP |
766 | static const UnitDependency deps[] = { |
767 | UNIT_REQUIRED_BY, | |
768 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
769 | UNIT_WANTED_BY, | |
770 | UNIT_BOUND_BY | |
771 | }; | |
772 | ||
bba34eed | 773 | Unit *target; |
98bc2000 LP |
774 | Iterator i; |
775 | int r; | |
21256a2b | 776 | unsigned k; |
98bc2000 LP |
777 | |
778 | assert(u); | |
779 | ||
21256a2b LP |
780 | for (k = 0; k < ELEMENTSOF(deps); k++) |
781 | SET_FOREACH(target, u->meta.dependencies[deps[k]], i) | |
782 | if ((r = unit_add_default_target_dependency(u, target)) < 0) | |
783 | return r; | |
b81884e7 | 784 | |
98bc2000 LP |
785 | return 0; |
786 | } | |
787 | ||
87f0e418 LP |
788 | int unit_load(Unit *u) { |
789 | int r; | |
790 | ||
791 | assert(u); | |
792 | ||
793 | if (u->meta.in_load_queue) { | |
794 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
795 | u->meta.in_load_queue = false; | |
796 | } | |
797 | ||
e537352b LP |
798 | if (u->meta.type == _UNIT_TYPE_INVALID) |
799 | return -EINVAL; | |
800 | ||
87f0e418 LP |
801 | if (u->meta.load_state != UNIT_STUB) |
802 | return 0; | |
803 | ||
e537352b LP |
804 | if (UNIT_VTABLE(u)->load) |
805 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 806 | goto fail; |
23a177ef | 807 | |
e537352b | 808 | if (u->meta.load_state == UNIT_STUB) { |
23a177ef LP |
809 | r = -ENOENT; |
810 | goto fail; | |
811 | } | |
812 | ||
98bc2000 LP |
813 | if (u->meta.load_state == UNIT_LOADED && |
814 | u->meta.default_dependencies) | |
815 | if ((r = unit_add_default_dependencies(u)) < 0) | |
816 | goto fail; | |
817 | ||
23a177ef LP |
818 | assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into); |
819 | ||
820 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 821 | unit_add_to_gc_queue(u); |
87f0e418 | 822 | |
87f0e418 LP |
823 | return 0; |
824 | ||
825 | fail: | |
fdf20a31 | 826 | u->meta.load_state = UNIT_ERROR; |
8821a00f | 827 | u->meta.load_error = r; |
c1e1601e | 828 | unit_add_to_dbus_queue(u); |
23a177ef | 829 | |
8821a00f | 830 | log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); |
23a177ef | 831 | |
87f0e418 LP |
832 | return r; |
833 | } | |
834 | ||
90bbc946 LP |
835 | bool unit_condition_test(Unit *u) { |
836 | assert(u); | |
837 | ||
838 | dual_timestamp_get(&u->meta.condition_timestamp); | |
839 | u->meta.condition_result = condition_test_list(u->meta.conditions); | |
840 | ||
841 | return u->meta.condition_result; | |
842 | } | |
843 | ||
87f0e418 | 844 | /* Errors: |
d5159713 LP |
845 | * -EBADR: This unit type does not support starting. |
846 | * -EALREADY: Unit is already started. | |
847 | * -EAGAIN: An operation is already in progress. Retry later. | |
848 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
849 | */ |
850 | int unit_start(Unit *u) { | |
851 | UnitActiveState state; | |
92ab323c | 852 | Unit *following; |
87f0e418 LP |
853 | |
854 | assert(u); | |
855 | ||
6124958c LP |
856 | if (u->meta.load_state != UNIT_LOADED) |
857 | return -EINVAL; | |
858 | ||
7898b0cf LP |
859 | /* If this is already (being) started, then this will |
860 | * succeed. Note that this will even succeed if this unit is | |
861 | * not startable by the user. This is relied on to detect when | |
862 | * we need to wait for units and when waiting is finished. */ | |
87f0e418 LP |
863 | state = unit_active_state(u); |
864 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
865 | return -EALREADY; | |
866 | ||
52661efd | 867 | /* If the conditions failed, don't do anything at all */ |
90bbc946 | 868 | if (!unit_condition_test(u)) { |
52661efd LP |
869 | log_debug("Starting of %s requested but condition failed. Ignoring.", u->meta.id); |
870 | return -EALREADY; | |
871 | } | |
872 | ||
92ab323c LP |
873 | /* Forward to the main object, if we aren't it. */ |
874 | if ((following = unit_following(u))) { | |
875 | log_debug("Redirecting start request from %s to %s.", u->meta.id, following->meta.id); | |
876 | return unit_start(following); | |
877 | } | |
878 | ||
879 | /* If it is stopped, but we cannot start it, then fail */ | |
880 | if (!UNIT_VTABLE(u)->start) | |
881 | return -EBADR; | |
882 | ||
87f0e418 LP |
883 | /* We don't suppress calls to ->start() here when we are |
884 | * already starting, to allow this request to be used as a | |
885 | * "hurry up" call, for example when the unit is in some "auto | |
886 | * restart" state where it waits for a holdoff timer to elapse | |
887 | * before it will start again. */ | |
888 | ||
c1e1601e | 889 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
890 | |
891 | unit_status_printf(u, "Starting %s...\n", unit_description(u)); | |
87f0e418 LP |
892 | return UNIT_VTABLE(u)->start(u); |
893 | } | |
894 | ||
895 | bool unit_can_start(Unit *u) { | |
896 | assert(u); | |
897 | ||
898 | return !!UNIT_VTABLE(u)->start; | |
899 | } | |
900 | ||
2528a7a6 LP |
901 | bool unit_can_isolate(Unit *u) { |
902 | assert(u); | |
903 | ||
904 | return unit_can_start(u) && | |
905 | u->meta.allow_isolate; | |
906 | } | |
907 | ||
87f0e418 LP |
908 | /* Errors: |
909 | * -EBADR: This unit type does not support stopping. | |
910 | * -EALREADY: Unit is already stopped. | |
911 | * -EAGAIN: An operation is already in progress. Retry later. | |
912 | */ | |
913 | int unit_stop(Unit *u) { | |
914 | UnitActiveState state; | |
92ab323c | 915 | Unit *following; |
87f0e418 LP |
916 | |
917 | assert(u); | |
918 | ||
87f0e418 | 919 | state = unit_active_state(u); |
fdf20a31 | 920 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
921 | return -EALREADY; |
922 | ||
92ab323c LP |
923 | if ((following = unit_following(u))) { |
924 | log_debug("Redirecting stop request from %s to %s.", u->meta.id, following->meta.id); | |
925 | return unit_stop(following); | |
926 | } | |
927 | ||
7898b0cf LP |
928 | if (!UNIT_VTABLE(u)->stop) |
929 | return -EBADR; | |
930 | ||
c1e1601e | 931 | unit_add_to_dbus_queue(u); |
9e58ff9c LP |
932 | |
933 | unit_status_printf(u, "Stopping %s...\n", unit_description(u)); | |
87f0e418 LP |
934 | return UNIT_VTABLE(u)->stop(u); |
935 | } | |
936 | ||
937 | /* Errors: | |
938 | * -EBADR: This unit type does not support reloading. | |
939 | * -ENOEXEC: Unit is not started. | |
940 | * -EAGAIN: An operation is already in progress. Retry later. | |
941 | */ | |
942 | int unit_reload(Unit *u) { | |
943 | UnitActiveState state; | |
92ab323c | 944 | Unit *following; |
87f0e418 LP |
945 | |
946 | assert(u); | |
947 | ||
6124958c LP |
948 | if (u->meta.load_state != UNIT_LOADED) |
949 | return -EINVAL; | |
950 | ||
87f0e418 LP |
951 | if (!unit_can_reload(u)) |
952 | return -EBADR; | |
953 | ||
954 | state = unit_active_state(u); | |
e364ad06 | 955 | if (state == UNIT_RELOADING) |
87f0e418 LP |
956 | return -EALREADY; |
957 | ||
e364ad06 | 958 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
959 | return -ENOEXEC; |
960 | ||
92ab323c LP |
961 | if ((following = unit_following(u))) { |
962 | log_debug("Redirecting reload request from %s to %s.", u->meta.id, following->meta.id); | |
963 | return unit_reload(following); | |
964 | } | |
965 | ||
c1e1601e | 966 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
967 | return UNIT_VTABLE(u)->reload(u); |
968 | } | |
969 | ||
970 | bool unit_can_reload(Unit *u) { | |
971 | assert(u); | |
972 | ||
973 | if (!UNIT_VTABLE(u)->reload) | |
974 | return false; | |
975 | ||
976 | if (!UNIT_VTABLE(u)->can_reload) | |
977 | return true; | |
978 | ||
979 | return UNIT_VTABLE(u)->can_reload(u); | |
980 | } | |
981 | ||
b4a16b7b | 982 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
983 | Iterator i; |
984 | Unit *other; | |
985 | ||
986 | assert(u); | |
987 | ||
988 | /* If this service shall be shut down when unneeded then do | |
989 | * so. */ | |
990 | ||
991 | if (!u->meta.stop_when_unneeded) | |
992 | return; | |
993 | ||
994 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
995 | return; | |
996 | ||
997 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
998 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
999 | return; | |
1000 | ||
9e2f7c11 | 1001 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f3bff0eb LP |
1002 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1003 | return; | |
1004 | ||
1005 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i) | |
1006 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1007 | return; | |
1008 | ||
b81884e7 LP |
1009 | SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i) |
1010 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1011 | return; | |
1012 | ||
54165a39 | 1013 | log_info("Service %s is not needed anymore. Stopping.", u->meta.id); |
f3bff0eb LP |
1014 | |
1015 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
398ef8ba | 1016 | manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1017 | } |
1018 | ||
87f0e418 LP |
1019 | static void retroactively_start_dependencies(Unit *u) { |
1020 | Iterator i; | |
1021 | Unit *other; | |
1022 | ||
1023 | assert(u); | |
1024 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1025 | ||
1026 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
b81884e7 LP |
1027 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1028 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
1029 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); | |
1030 | ||
1031 | SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i) | |
1032 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && | |
1033 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1034 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1035 | |
9e2f7c11 | 1036 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
b81884e7 LP |
1037 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1038 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1039 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
1040 | |
1041 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
b81884e7 LP |
1042 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1043 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1044 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1045 | |
1046 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
b81884e7 LP |
1047 | if (!set_get(u->meta.dependencies[UNIT_AFTER], other) && |
1048 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
398ef8ba | 1049 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 LP |
1050 | |
1051 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) | |
b81884e7 | 1052 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
398ef8ba | 1053 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 LP |
1054 | |
1055 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTED_BY], i) | |
b81884e7 | 1056 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
69dd2852 | 1057 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1058 | } |
1059 | ||
1060 | static void retroactively_stop_dependencies(Unit *u) { | |
1061 | Iterator i; | |
1062 | Unit *other; | |
1063 | ||
1064 | assert(u); | |
1065 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1066 | ||
b81884e7 LP |
1067 | /* Pull down units which are bound to us recursively if enabled */ |
1068 | SET_FOREACH(other, u->meta.dependencies[UNIT_BOUND_BY], i) | |
1069 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
f14e15f8 | 1070 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
f3bff0eb LP |
1071 | |
1072 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
1073 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
87f0e418 | 1074 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1075 | unit_check_unneeded(other); |
9e2f7c11 | 1076 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1077 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1078 | unit_check_unneeded(other); |
f3bff0eb LP |
1079 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) |
1080 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
b4a16b7b | 1081 | unit_check_unneeded(other); |
f3bff0eb LP |
1082 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) |
1083 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
b4a16b7b | 1084 | unit_check_unneeded(other); |
9e2f7c11 | 1085 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1086 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1087 | unit_check_unneeded(other); |
b81884e7 LP |
1088 | SET_FOREACH(other, u->meta.dependencies[UNIT_BIND_TO], i) |
1089 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
1090 | unit_check_unneeded(other); | |
87f0e418 LP |
1091 | } |
1092 | ||
c0daa706 LP |
1093 | void unit_trigger_on_failure(Unit *u) { |
1094 | Unit *other; | |
1095 | Iterator i; | |
1096 | ||
1097 | assert(u); | |
1098 | ||
1099 | SET_FOREACH(other, u->meta.dependencies[UNIT_ON_FAILURE], i) | |
1100 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); | |
1101 | } | |
1102 | ||
e2f3b44c | 1103 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
7e6e7b06 | 1104 | bool unexpected; |
a096ed36 | 1105 | |
87f0e418 LP |
1106 | assert(u); |
1107 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1108 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1109 | |
8e471ccd LP |
1110 | /* Note that this is called for all low-level state changes, |
1111 | * even if they might map to the same high-level | |
1112 | * UnitActiveState! That means that ns == os is OK an expected | |
1113 | * behaviour here. For example: if a mount point is remounted | |
cd6d0a45 | 1114 | * this function will be called too! */ |
87f0e418 | 1115 | |
bdbf9951 LP |
1116 | if (u->meta.manager->n_deserializing <= 0) { |
1117 | dual_timestamp ts; | |
173e3821 | 1118 | |
bdbf9951 | 1119 | dual_timestamp_get(&ts); |
173e3821 | 1120 | |
bdbf9951 LP |
1121 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
1122 | u->meta.inactive_exit_timestamp = ts; | |
1123 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) | |
1124 | u->meta.inactive_enter_timestamp = ts; | |
1125 | ||
1126 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
1127 | u->meta.active_enter_timestamp = ts; | |
1128 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
1129 | u->meta.active_exit_timestamp = ts; | |
1130 | ||
1131 | timer_unit_notify(u, ns); | |
1132 | path_unit_notify(u, ns); | |
1133 | } | |
87f0e418 | 1134 | |
fdf20a31 | 1135 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
fb385181 LP |
1136 | cgroup_bonding_trim_list(u->meta.cgroup_bondings, true); |
1137 | ||
87f0e418 | 1138 | if (u->meta.job) { |
7e6e7b06 | 1139 | unexpected = false; |
87f0e418 LP |
1140 | |
1141 | if (u->meta.job->state == JOB_WAITING) | |
1142 | ||
1143 | /* So we reached a different state for this | |
1144 | * job. Let's see if we can run it now if it | |
1145 | * failed previously due to EAGAIN. */ | |
c1e1601e | 1146 | job_add_to_run_queue(u->meta.job); |
87f0e418 | 1147 | |
b410e6b9 | 1148 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1149 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1150 | * hence needs to invalidate jobs. */ |
87f0e418 | 1151 | |
b410e6b9 | 1152 | switch (u->meta.job->type) { |
87f0e418 | 1153 | |
b410e6b9 LP |
1154 | case JOB_START: |
1155 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1156 | |
b410e6b9 | 1157 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5d44db4a | 1158 | job_finish_and_invalidate(u->meta.job, JOB_DONE); |
b410e6b9 LP |
1159 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
1160 | unexpected = true; | |
41b02ec7 | 1161 | |
fdf20a31 | 1162 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5d44db4a | 1163 | job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
b410e6b9 | 1164 | } |
87f0e418 | 1165 | |
b410e6b9 | 1166 | break; |
87f0e418 | 1167 | |
b410e6b9 LP |
1168 | case JOB_RELOAD: |
1169 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1170 | |
b410e6b9 | 1171 | if (u->meta.job->state == JOB_RUNNING) { |
a096ed36 | 1172 | if (ns == UNIT_ACTIVE) |
5d44db4a | 1173 | job_finish_and_invalidate(u->meta.job, reload_success ? JOB_DONE : JOB_FAILED); |
032ff4af | 1174 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1175 | unexpected = true; |
41b02ec7 | 1176 | |
fdf20a31 | 1177 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5d44db4a | 1178 | job_finish_and_invalidate(u->meta.job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
a096ed36 | 1179 | } |
b410e6b9 | 1180 | } |
87f0e418 | 1181 | |
b410e6b9 | 1182 | break; |
87f0e418 | 1183 | |
b410e6b9 LP |
1184 | case JOB_STOP: |
1185 | case JOB_RESTART: | |
1186 | case JOB_TRY_RESTART: | |
87f0e418 | 1187 | |
fdf20a31 | 1188 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5d44db4a | 1189 | job_finish_and_invalidate(u->meta.job, JOB_DONE); |
b410e6b9 LP |
1190 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
1191 | unexpected = true; | |
5d44db4a | 1192 | job_finish_and_invalidate(u->meta.job, JOB_FAILED); |
b410e6b9 | 1193 | } |
87f0e418 | 1194 | |
b410e6b9 | 1195 | break; |
87f0e418 | 1196 | |
b410e6b9 LP |
1197 | default: |
1198 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1199 | } |
87f0e418 | 1200 | |
7e6e7b06 LP |
1201 | } else |
1202 | unexpected = true; | |
1203 | ||
bdbf9951 | 1204 | if (u->meta.manager->n_deserializing <= 0) { |
f3bff0eb | 1205 | |
bdbf9951 LP |
1206 | /* If this state change happened without being |
1207 | * requested by a job, then let's retroactively start | |
1208 | * or stop dependencies. We skip that step when | |
1209 | * deserializing, since we don't want to create any | |
1210 | * additional jobs just because something is already | |
1211 | * activated. */ | |
1212 | ||
1213 | if (unexpected) { | |
1214 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1215 | retroactively_start_dependencies(u); | |
1216 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1217 | retroactively_stop_dependencies(u); | |
1218 | } | |
5de9682c | 1219 | |
bdbf9951 LP |
1220 | if (ns != os && ns == UNIT_FAILED) { |
1221 | log_notice("Unit %s entered failed state.", u->meta.id); | |
1222 | unit_trigger_on_failure(u); | |
cd6d0a45 | 1223 | } |
e537352b | 1224 | |
e983b760 | 1225 | |
bdbf9951 LP |
1226 | /* Some names are special */ |
1227 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d | 1228 | |
bdbf9951 LP |
1229 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) |
1230 | /* The bus just might have become available, | |
1231 | * hence try to connect to it, if we aren't | |
1232 | * yet connected. */ | |
1233 | bus_init(u->meta.manager, true); | |
4927fcae | 1234 | |
bdbf9951 LP |
1235 | if (u->meta.type == UNIT_SERVICE && |
1236 | !UNIT_IS_ACTIVE_OR_RELOADING(os)) { | |
1237 | /* Write audit record if we have just finished starting up */ | |
1238 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, true); | |
1239 | u->meta.in_audit = true; | |
1240 | } | |
1241 | ||
1242 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) | |
1243 | manager_send_unit_plymouth(u->meta.manager, u); | |
1244 | ||
1245 | } else { | |
1246 | ||
1247 | /* We don't care about D-Bus here, since we'll get an | |
1248 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1249 | |
bdbf9951 LP |
1250 | if (u->meta.type == UNIT_SERVICE && |
1251 | UNIT_IS_INACTIVE_OR_FAILED(ns) && | |
1252 | !UNIT_IS_INACTIVE_OR_FAILED(os)) { | |
4927fcae | 1253 | |
bdbf9951 LP |
1254 | /* Hmm, if there was no start record written |
1255 | * write it now, so that we always have a nice | |
1256 | * pair */ | |
1257 | if (!u->meta.in_audit) { | |
1258 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 1259 | |
bdbf9951 LP |
1260 | if (ns == UNIT_INACTIVE) |
1261 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, true); | |
1262 | } else | |
1263 | /* Write audit record if we have just finished shutting down */ | |
1264 | manager_send_unit_audit(u->meta.manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); | |
1265 | ||
1266 | u->meta.in_audit = false; | |
1267 | } | |
cd6d0a45 | 1268 | } |
bdbf9951 LP |
1269 | |
1270 | manager_recheck_syslog(u->meta.manager); | |
f278026d LP |
1271 | } |
1272 | ||
f3bff0eb LP |
1273 | /* Maybe we finished startup and are now ready for being |
1274 | * stopped because unneeded? */ | |
b4a16b7b | 1275 | unit_check_unneeded(u); |
c1e1601e LP |
1276 | |
1277 | unit_add_to_dbus_queue(u); | |
701cc384 | 1278 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1279 | } |
1280 | ||
acbb0225 | 1281 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1282 | struct epoll_event ev; |
1283 | ||
1284 | assert(u); | |
1285 | assert(fd >= 0); | |
acbb0225 | 1286 | assert(w); |
ea430986 | 1287 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1288 | |
1289 | zero(ev); | |
acbb0225 | 1290 | ev.data.ptr = w; |
87f0e418 LP |
1291 | ev.events = events; |
1292 | ||
acbb0225 LP |
1293 | if (epoll_ctl(u->meta.manager->epoll_fd, |
1294 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, | |
1295 | fd, | |
1296 | &ev) < 0) | |
1297 | return -errno; | |
87f0e418 | 1298 | |
acbb0225 LP |
1299 | w->fd = fd; |
1300 | w->type = WATCH_FD; | |
ea430986 | 1301 | w->data.unit = u; |
87f0e418 | 1302 | |
acbb0225 | 1303 | return 0; |
87f0e418 LP |
1304 | } |
1305 | ||
acbb0225 | 1306 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1307 | assert(u); |
acbb0225 | 1308 | assert(w); |
87f0e418 | 1309 | |
acbb0225 LP |
1310 | if (w->type == WATCH_INVALID) |
1311 | return; | |
1312 | ||
ea430986 LP |
1313 | assert(w->type == WATCH_FD); |
1314 | assert(w->data.unit == u); | |
acbb0225 LP |
1315 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
1316 | ||
1317 | w->fd = -1; | |
1318 | w->type = WATCH_INVALID; | |
ea430986 | 1319 | w->data.unit = NULL; |
87f0e418 LP |
1320 | } |
1321 | ||
1322 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1323 | assert(u); | |
1324 | assert(pid >= 1); | |
1325 | ||
05e343b7 LP |
1326 | /* Watch a specific PID. We only support one unit watching |
1327 | * each PID for now. */ | |
1328 | ||
c6c18be3 | 1329 | return hashmap_put(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1330 | } |
1331 | ||
1332 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1333 | assert(u); | |
1334 | assert(pid >= 1); | |
1335 | ||
c6c18be3 | 1336 | hashmap_remove_value(u->meta.manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1337 | } |
1338 | ||
acbb0225 | 1339 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1340 | struct itimerspec its; |
acbb0225 | 1341 | int flags, fd; |
87f0e418 LP |
1342 | bool ours; |
1343 | ||
1344 | assert(u); | |
acbb0225 | 1345 | assert(w); |
faf919f1 | 1346 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1347 | |
1348 | /* This will try to reuse the old timer if there is one */ | |
1349 | ||
faf919f1 LP |
1350 | if (w->type == WATCH_UNIT_TIMER) { |
1351 | assert(w->data.unit == u); | |
1352 | assert(w->fd >= 0); | |
1353 | ||
87f0e418 | 1354 | ours = false; |
acbb0225 | 1355 | fd = w->fd; |
faf919f1 LP |
1356 | } else if (w->type == WATCH_INVALID) { |
1357 | ||
87f0e418 | 1358 | ours = true; |
87f0e418 LP |
1359 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1360 | return -errno; | |
faf919f1 LP |
1361 | } else |
1362 | assert_not_reached("Invalid watch type"); | |
87f0e418 LP |
1363 | |
1364 | zero(its); | |
1365 | ||
1366 | if (delay <= 0) { | |
1367 | /* Set absolute time in the past, but not 0, since we | |
1368 | * don't want to disarm the timer */ | |
1369 | its.it_value.tv_sec = 0; | |
1370 | its.it_value.tv_nsec = 1; | |
1371 | ||
1372 | flags = TFD_TIMER_ABSTIME; | |
1373 | } else { | |
1374 | timespec_store(&its.it_value, delay); | |
1375 | flags = 0; | |
1376 | } | |
1377 | ||
1378 | /* This will also flush the elapse counter */ | |
1379 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1380 | goto fail; | |
1381 | ||
acbb0225 LP |
1382 | if (w->type == WATCH_INVALID) { |
1383 | struct epoll_event ev; | |
87f0e418 | 1384 | |
acbb0225 LP |
1385 | zero(ev); |
1386 | ev.data.ptr = w; | |
f94ea366 | 1387 | ev.events = EPOLLIN; |
acbb0225 LP |
1388 | |
1389 | if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) | |
1390 | goto fail; | |
1391 | } | |
1392 | ||
faf919f1 | 1393 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1394 | w->fd = fd; |
ea430986 | 1395 | w->data.unit = u; |
87f0e418 | 1396 | |
87f0e418 LP |
1397 | return 0; |
1398 | ||
1399 | fail: | |
1400 | if (ours) | |
ea430986 | 1401 | close_nointr_nofail(fd); |
87f0e418 LP |
1402 | |
1403 | return -errno; | |
1404 | } | |
1405 | ||
acbb0225 | 1406 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1407 | assert(u); |
acbb0225 | 1408 | assert(w); |
87f0e418 | 1409 | |
acbb0225 | 1410 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1411 | return; |
1412 | ||
faf919f1 LP |
1413 | assert(w->type == WATCH_UNIT_TIMER); |
1414 | assert(w->data.unit == u); | |
1415 | assert(w->fd >= 0); | |
acbb0225 LP |
1416 | |
1417 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
a16e1123 | 1418 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1419 | |
1420 | w->fd = -1; | |
1421 | w->type = WATCH_INVALID; | |
ea430986 | 1422 | w->data.unit = NULL; |
87f0e418 LP |
1423 | } |
1424 | ||
1425 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1426 | assert(u); | |
1427 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1428 | ||
1429 | switch (j) { | |
1430 | ||
1431 | case JOB_VERIFY_ACTIVE: | |
1432 | case JOB_START: | |
57339f47 | 1433 | case JOB_STOP: |
87f0e418 LP |
1434 | return true; |
1435 | ||
87f0e418 LP |
1436 | case JOB_RESTART: |
1437 | case JOB_TRY_RESTART: | |
1438 | return unit_can_start(u); | |
1439 | ||
1440 | case JOB_RELOAD: | |
1441 | return unit_can_reload(u); | |
1442 | ||
1443 | case JOB_RELOAD_OR_START: | |
1444 | return unit_can_reload(u) && unit_can_start(u); | |
1445 | ||
1446 | default: | |
1447 | assert_not_reached("Invalid job type"); | |
1448 | } | |
1449 | } | |
1450 | ||
701cc384 | 1451 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1452 | |
1453 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1454 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1455 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1456 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1457 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1458 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
b81884e7 | 1459 | [UNIT_BIND_TO] = UNIT_BOUND_BY, |
87f0e418 | 1460 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1461 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1462 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
b81884e7 | 1463 | [UNIT_BOUND_BY] = UNIT_BIND_TO, |
69dd2852 LP |
1464 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1465 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1466 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1467 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1468 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 LP |
1469 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
1470 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES | |
87f0e418 | 1471 | }; |
701cc384 | 1472 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1473 | |
1474 | assert(u); | |
1475 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1476 | assert(other); |
1477 | ||
9f151f29 LP |
1478 | u = unit_follow_merge(u); |
1479 | other = unit_follow_merge(other); | |
1480 | ||
87f0e418 LP |
1481 | /* We won't allow dependencies on ourselves. We will not |
1482 | * consider them an error however. */ | |
1483 | if (u == other) | |
1484 | return 0; | |
1485 | ||
5de9682c | 1486 | if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1487 | return r; |
1488 | ||
5de9682c LP |
1489 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
1490 | if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) | |
1491 | return r; | |
1492 | ||
701cc384 LP |
1493 | if (add_reference) |
1494 | if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || | |
1495 | (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
1496 | return r; | |
87f0e418 | 1497 | |
701cc384 LP |
1498 | if ((q = set_put(u->meta.dependencies[d], other)) < 0) |
1499 | return q; | |
87f0e418 | 1500 | |
5de9682c LP |
1501 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
1502 | if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) { | |
1503 | r = v; | |
1504 | goto fail; | |
1505 | } | |
701cc384 LP |
1506 | |
1507 | if (add_reference) { | |
1508 | if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) { | |
1509 | r = w; | |
1510 | goto fail; | |
1511 | } | |
1512 | ||
1513 | if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0) | |
1514 | goto fail; | |
87f0e418 LP |
1515 | } |
1516 | ||
c1e1601e | 1517 | unit_add_to_dbus_queue(u); |
87f0e418 | 1518 | return 0; |
701cc384 LP |
1519 | |
1520 | fail: | |
1521 | if (q > 0) | |
1522 | set_remove(u->meta.dependencies[d], other); | |
1523 | ||
1524 | if (v > 0) | |
1525 | set_remove(other->meta.dependencies[inverse_table[d]], u); | |
1526 | ||
1527 | if (w > 0) | |
1528 | set_remove(u->meta.dependencies[UNIT_REFERENCES], other); | |
1529 | ||
1530 | return r; | |
87f0e418 | 1531 | } |
0301abf4 | 1532 | |
2c966c03 LP |
1533 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1534 | int r; | |
1535 | ||
1536 | assert(u); | |
1537 | ||
1538 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1539 | return r; | |
1540 | ||
1541 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1542 | return r; | |
1543 | ||
1544 | return 0; | |
1545 | } | |
1546 | ||
9e2f7c11 LP |
1547 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1548 | char *s; | |
1549 | ||
1550 | assert(u); | |
1551 | assert(name || path); | |
1552 | ||
1553 | if (!name) | |
1554 | name = file_name_from_path(path); | |
1555 | ||
1556 | if (!unit_name_is_template(name)) { | |
1557 | *p = NULL; | |
1558 | return name; | |
1559 | } | |
1560 | ||
1561 | if (u->meta.instance) | |
1562 | s = unit_name_replace_instance(name, u->meta.instance); | |
1563 | else { | |
1564 | char *i; | |
1565 | ||
1566 | if (!(i = unit_name_to_prefix(u->meta.id))) | |
1567 | return NULL; | |
1568 | ||
1569 | s = unit_name_replace_instance(name, i); | |
1570 | free(i); | |
1571 | } | |
1572 | ||
1573 | if (!s) | |
1574 | return NULL; | |
1575 | ||
1576 | *p = s; | |
1577 | return s; | |
1578 | } | |
1579 | ||
701cc384 | 1580 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1581 | Unit *other; |
1582 | int r; | |
9e2f7c11 | 1583 | char *s; |
09b6b09f | 1584 | |
9e2f7c11 LP |
1585 | assert(u); |
1586 | assert(name || path); | |
09b6b09f | 1587 | |
9e2f7c11 LP |
1588 | if (!(name = resolve_template(u, name, path, &s))) |
1589 | return -ENOMEM; | |
09b6b09f | 1590 | |
398ef8ba | 1591 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1592 | goto finish; |
1593 | ||
701cc384 | 1594 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1595 | |
1596 | finish: | |
1597 | free(s); | |
1598 | return r; | |
09b6b09f LP |
1599 | } |
1600 | ||
2c966c03 LP |
1601 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1602 | Unit *other; | |
1603 | int r; | |
1604 | char *s; | |
1605 | ||
1606 | assert(u); | |
1607 | assert(name || path); | |
1608 | ||
1609 | if (!(name = resolve_template(u, name, path, &s))) | |
1610 | return -ENOMEM; | |
1611 | ||
398ef8ba | 1612 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1613 | goto finish; |
1614 | ||
1615 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1616 | ||
1617 | finish: | |
1618 | free(s); | |
1619 | return r; | |
1620 | } | |
1621 | ||
701cc384 | 1622 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1623 | Unit *other; |
1624 | int r; | |
9e2f7c11 | 1625 | char *s; |
bd77d0fc | 1626 | |
9e2f7c11 LP |
1627 | assert(u); |
1628 | assert(name || path); | |
bd77d0fc | 1629 | |
9e2f7c11 LP |
1630 | if (!(name = resolve_template(u, name, path, &s))) |
1631 | return -ENOMEM; | |
bd77d0fc | 1632 | |
398ef8ba | 1633 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1634 | goto finish; |
1635 | ||
701cc384 | 1636 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1637 | |
1638 | finish: | |
1639 | free(s); | |
1640 | return r; | |
bd77d0fc LP |
1641 | } |
1642 | ||
2c966c03 LP |
1643 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1644 | Unit *other; | |
1645 | int r; | |
1646 | char *s; | |
1647 | ||
1648 | assert(u); | |
1649 | assert(name || path); | |
1650 | ||
1651 | if (!(name = resolve_template(u, name, path, &s))) | |
1652 | return -ENOMEM; | |
1653 | ||
398ef8ba | 1654 | if ((r = manager_load_unit(u->meta.manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1655 | goto finish; |
1656 | ||
1657 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1658 | goto finish; | |
1659 | ||
1660 | finish: | |
1661 | free(s); | |
1662 | return r; | |
1663 | } | |
1664 | ||
0301abf4 LP |
1665 | int set_unit_path(const char *p) { |
1666 | char *cwd, *c; | |
1667 | int r; | |
1668 | ||
1669 | /* This is mostly for debug purposes */ | |
1670 | ||
1671 | if (path_is_absolute(p)) { | |
1672 | if (!(c = strdup(p))) | |
1673 | return -ENOMEM; | |
1674 | } else { | |
1675 | if (!(cwd = get_current_dir_name())) | |
1676 | return -errno; | |
1677 | ||
1678 | r = asprintf(&c, "%s/%s", cwd, p); | |
1679 | free(cwd); | |
1680 | ||
1681 | if (r < 0) | |
1682 | return -ENOMEM; | |
1683 | } | |
1684 | ||
036643a2 | 1685 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1686 | r = -errno; |
1687 | free(c); | |
1688 | return r; | |
1689 | } | |
1690 | ||
1691 | return 0; | |
1692 | } | |
88066b3a | 1693 | |
ea430986 LP |
1694 | char *unit_dbus_path(Unit *u) { |
1695 | char *p, *e; | |
1696 | ||
1697 | assert(u); | |
1698 | ||
04ade7d2 LP |
1699 | if (!u->meta.id) |
1700 | return NULL; | |
1701 | ||
9e2f7c11 | 1702 | if (!(e = bus_path_escape(u->meta.id))) |
ea430986 LP |
1703 | return NULL; |
1704 | ||
35d2e7ec | 1705 | p = strappend("/org/freedesktop/systemd1/unit/", e); |
ea430986 | 1706 | free(e); |
35d2e7ec | 1707 | |
ea430986 LP |
1708 | return p; |
1709 | } | |
1710 | ||
8e274523 | 1711 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
8e274523 LP |
1712 | int r; |
1713 | ||
1714 | assert(u); | |
1715 | assert(b); | |
35d2e7ec | 1716 | |
8e274523 LP |
1717 | assert(b->path); |
1718 | ||
35d2e7ec LP |
1719 | if (!b->controller) |
1720 | if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) | |
1721 | return -ENOMEM; | |
1722 | ||
8e274523 LP |
1723 | /* Ensure this hasn't been added yet */ |
1724 | assert(!b->unit); | |
1725 | ||
d686d8a9 LP |
1726 | if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
1727 | CGroupBonding *l; | |
8e274523 | 1728 | |
d686d8a9 LP |
1729 | l = hashmap_get(u->meta.manager->cgroup_bondings, b->path); |
1730 | LIST_PREPEND(CGroupBonding, by_path, l, b); | |
1731 | ||
1732 | if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) { | |
1733 | LIST_REMOVE(CGroupBonding, by_path, l, b); | |
1734 | return r; | |
1735 | } | |
8e274523 LP |
1736 | } |
1737 | ||
1738 | LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b); | |
1739 | b->unit = u; | |
1740 | ||
1741 | return 0; | |
1742 | } | |
1743 | ||
013b87c0 LP |
1744 | static char *default_cgroup_path(Unit *u) { |
1745 | char *p; | |
4f2d528d | 1746 | int r; |
013b87c0 LP |
1747 | |
1748 | assert(u); | |
1749 | ||
4f2d528d LP |
1750 | if (u->meta.instance) { |
1751 | char *t; | |
013b87c0 | 1752 | |
4f2d528d LP |
1753 | if (!(t = unit_name_template(u->meta.id))) |
1754 | return NULL; | |
1755 | ||
1756 | r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance); | |
1757 | free(t); | |
1758 | } else | |
1759 | r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id); | |
1760 | ||
1761 | return r < 0 ? NULL : p; | |
013b87c0 LP |
1762 | } |
1763 | ||
8e274523 | 1764 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
013b87c0 LP |
1765 | char *controller = NULL, *path = NULL; |
1766 | CGroupBonding *b = NULL; | |
8e274523 LP |
1767 | int r; |
1768 | ||
1769 | assert(u); | |
1770 | assert(name); | |
1771 | ||
35d2e7ec LP |
1772 | if ((r = cg_split_spec(name, &controller, &path)) < 0) |
1773 | return r; | |
8e274523 | 1774 | |
35d2e7ec LP |
1775 | if (!path) |
1776 | path = default_cgroup_path(u); | |
013b87c0 | 1777 | |
35d2e7ec | 1778 | if (!controller) |
55096547 | 1779 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
013b87c0 | 1780 | |
35d2e7ec LP |
1781 | if (!path || !controller) { |
1782 | free(path); | |
1783 | free(controller); | |
1784 | ||
1785 | return -ENOMEM; | |
8e274523 LP |
1786 | } |
1787 | ||
013b87c0 LP |
1788 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) { |
1789 | r = -EEXIST; | |
1790 | goto fail; | |
1791 | } | |
8e274523 | 1792 | |
013b87c0 | 1793 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1794 | r = -ENOMEM; |
1795 | goto fail; | |
1796 | } | |
1797 | ||
013b87c0 LP |
1798 | b->controller = controller; |
1799 | b->path = path; | |
d686d8a9 | 1800 | b->ours = false; |
8e274523 LP |
1801 | |
1802 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1803 | goto fail; | |
1804 | ||
1805 | return 0; | |
1806 | ||
1807 | fail: | |
013b87c0 LP |
1808 | free(path); |
1809 | free(controller); | |
8e274523 LP |
1810 | free(b); |
1811 | ||
1812 | return r; | |
1813 | } | |
1814 | ||
06d4c99a | 1815 | static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
d686d8a9 | 1816 | CGroupBonding *b = NULL; |
8e274523 LP |
1817 | int r = -ENOMEM; |
1818 | ||
1819 | assert(u); | |
1820 | ||
06d4c99a LP |
1821 | if (!controller) |
1822 | controller = SYSTEMD_CGROUP_CONTROLLER; | |
8e274523 | 1823 | |
06d4c99a LP |
1824 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) |
1825 | return 0; | |
8e274523 | 1826 | |
06d4c99a LP |
1827 | if (!(b = new0(CGroupBonding, 1))) |
1828 | return -ENOMEM; | |
8e274523 | 1829 | |
06d4c99a LP |
1830 | if (!(b->controller = strdup(controller))) |
1831 | goto fail; | |
d686d8a9 | 1832 | |
06d4c99a LP |
1833 | if (!(b->path = default_cgroup_path(u))) |
1834 | goto fail; | |
d686d8a9 | 1835 | |
06d4c99a LP |
1836 | b->ours = true; |
1837 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
d686d8a9 | 1838 | |
06d4c99a LP |
1839 | if ((r = unit_add_cgroup(u, b)) < 0) |
1840 | goto fail; | |
8e274523 LP |
1841 | |
1842 | return 0; | |
1843 | ||
1844 | fail: | |
06d4c99a LP |
1845 | free(b->path); |
1846 | free(b->controller); | |
1847 | free(b); | |
8e274523 LP |
1848 | |
1849 | return r; | |
1850 | } | |
1851 | ||
06d4c99a LP |
1852 | int unit_add_default_cgroups(Unit *u) { |
1853 | char **c; | |
1854 | int r; | |
1855 | assert(u); | |
1856 | ||
1857 | /* Adds in the default cgroups, if they weren't specified | |
1858 | * otherwise. */ | |
1859 | ||
1860 | if ((r = unit_add_one_default_cgroup(u, NULL)) < 0) | |
1861 | return r; | |
1862 | ||
1863 | STRV_FOREACH(c, u->meta.manager->default_controllers) | |
1864 | if ((r = unit_add_one_default_cgroup(u, *c)) < 0) | |
1865 | return r; | |
1866 | ||
1867 | return 0; | |
1868 | } | |
1869 | ||
8e274523 LP |
1870 | CGroupBonding* unit_get_default_cgroup(Unit *u) { |
1871 | assert(u); | |
1872 | ||
55096547 | 1873 | return cgroup_bonding_find_list(u->meta.cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); |
8e274523 LP |
1874 | } |
1875 | ||
f6ff8c29 LP |
1876 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
1877 | char *t; | |
1878 | int r; | |
1879 | ||
1880 | assert(u); | |
1881 | assert(type); | |
1882 | assert(_found); | |
1883 | ||
9e2f7c11 | 1884 | if (!(t = unit_name_change_suffix(u->meta.id, type))) |
f6ff8c29 LP |
1885 | return -ENOMEM; |
1886 | ||
1887 | assert(!unit_has_name(u, t)); | |
1888 | ||
398ef8ba | 1889 | r = manager_load_unit(u->meta.manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
1890 | free(t); |
1891 | ||
9e2f7c11 | 1892 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
1893 | |
1894 | return r; | |
1895 | } | |
1896 | ||
a16e1123 LP |
1897 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
1898 | Unit *found; | |
1899 | char *t; | |
1900 | ||
1901 | assert(u); | |
1902 | assert(type); | |
1903 | assert(_found); | |
1904 | ||
1905 | if (!(t = unit_name_change_suffix(u->meta.id, type))) | |
1906 | return -ENOMEM; | |
1907 | ||
1908 | assert(!unit_has_name(u, t)); | |
1909 | ||
1910 | found = manager_get_unit(u->meta.manager, t); | |
1911 | free(t); | |
1912 | ||
1913 | if (!found) | |
1914 | return -ENOENT; | |
1915 | ||
1916 | *_found = found; | |
1917 | return 0; | |
1918 | } | |
1919 | ||
9e2f7c11 LP |
1920 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
1921 | Unit *u = userdata; | |
1922 | assert(u); | |
1923 | ||
1924 | return unit_name_to_prefix_and_instance(u->meta.id); | |
1925 | } | |
1926 | ||
1927 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
1928 | Unit *u = userdata; | |
1929 | assert(u); | |
1930 | ||
1931 | return unit_name_to_prefix(u->meta.id); | |
1932 | } | |
1933 | ||
1934 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
1935 | Unit *u = userdata; | |
1936 | char *p, *r; | |
1937 | ||
1938 | assert(u); | |
1939 | ||
1940 | if (!(p = unit_name_to_prefix(u->meta.id))) | |
1941 | return NULL; | |
1942 | ||
1943 | r = unit_name_unescape(p); | |
1944 | free(p); | |
1945 | ||
1946 | return r; | |
1947 | } | |
1948 | ||
1949 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
1950 | Unit *u = userdata; | |
1951 | assert(u); | |
1952 | ||
1953 | if (u->meta.instance) | |
1954 | return unit_name_unescape(u->meta.instance); | |
1955 | ||
1956 | return strdup(""); | |
1957 | } | |
1958 | ||
9fc50704 LP |
1959 | static char *specifier_filename(char specifier, void *data, void *userdata) { |
1960 | Unit *u = userdata; | |
1961 | assert(u); | |
1962 | ||
1963 | if (u->meta.instance) | |
1964 | return unit_name_path_unescape(u->meta.instance); | |
1965 | ||
1966 | return unit_name_to_path(u->meta.instance); | |
1967 | } | |
1968 | ||
9e2f7c11 LP |
1969 | char *unit_name_printf(Unit *u, const char* format) { |
1970 | ||
1971 | /* | |
1972 | * This will use the passed string as format string and | |
1973 | * replace the following specifiers: | |
1974 | * | |
1975 | * %n: the full id of the unit (foo@bar.waldo) | |
1976 | * %N: the id of the unit without the suffix (foo@bar) | |
1977 | * %p: the prefix (foo) | |
1978 | * %i: the instance (bar) | |
1979 | */ | |
1980 | ||
1981 | const Specifier table[] = { | |
1982 | { 'n', specifier_string, u->meta.id }, | |
1983 | { 'N', specifier_prefix_and_instance, NULL }, | |
1984 | { 'p', specifier_prefix, NULL }, | |
1985 | { 'i', specifier_string, u->meta.instance }, | |
1986 | { 0, NULL, NULL } | |
1987 | }; | |
1988 | ||
1989 | assert(u); | |
1990 | assert(format); | |
1991 | ||
1992 | return specifier_printf(format, table, u); | |
1993 | } | |
1994 | ||
1995 | char *unit_full_printf(Unit *u, const char *format) { | |
1996 | ||
1997 | /* This is similar to unit_name_printf() but also supports | |
1998 | * unescaping */ | |
1999 | ||
2000 | const Specifier table[] = { | |
2001 | { 'n', specifier_string, u->meta.id }, | |
2002 | { 'N', specifier_prefix_and_instance, NULL }, | |
2003 | { 'p', specifier_prefix, NULL }, | |
2004 | { 'P', specifier_prefix_unescaped, NULL }, | |
2005 | { 'i', specifier_string, u->meta.instance }, | |
2006 | { 'I', specifier_instance_unescaped, NULL }, | |
9fc50704 | 2007 | { 'f', specifier_filename, NULL }, |
9e2f7c11 LP |
2008 | { 0, NULL, NULL } |
2009 | }; | |
2010 | ||
2011 | assert(u); | |
2012 | assert(format); | |
2013 | ||
2014 | return specifier_printf(format, table, u); | |
2015 | } | |
2016 | ||
2017 | char **unit_full_printf_strv(Unit *u, char **l) { | |
2018 | size_t n; | |
2019 | char **r, **i, **j; | |
2020 | ||
2021 | /* Applies unit_full_printf to every entry in l */ | |
2022 | ||
2023 | assert(u); | |
2024 | ||
2025 | n = strv_length(l); | |
2026 | if (!(r = new(char*, n+1))) | |
2027 | return NULL; | |
2028 | ||
2029 | for (i = l, j = r; *i; i++, j++) | |
2030 | if (!(*j = unit_full_printf(u, *i))) | |
2031 | goto fail; | |
2032 | ||
2033 | *j = NULL; | |
2034 | return r; | |
2035 | ||
2036 | fail: | |
2037 | j--; | |
2038 | while (j >= r) | |
2039 | free(*j); | |
2040 | ||
2041 | free(r); | |
2042 | ||
2043 | return NULL; | |
2044 | } | |
2045 | ||
05e343b7 LP |
2046 | int unit_watch_bus_name(Unit *u, const char *name) { |
2047 | assert(u); | |
2048 | assert(name); | |
2049 | ||
2050 | /* Watch a specific name on the bus. We only support one unit | |
2051 | * watching each name for now. */ | |
2052 | ||
2053 | return hashmap_put(u->meta.manager->watch_bus, name, u); | |
2054 | } | |
2055 | ||
2056 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2057 | assert(u); | |
2058 | assert(name); | |
2059 | ||
2060 | hashmap_remove_value(u->meta.manager->watch_bus, name, u); | |
2061 | } | |
2062 | ||
a16e1123 LP |
2063 | bool unit_can_serialize(Unit *u) { |
2064 | assert(u); | |
2065 | ||
2066 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2067 | } | |
2068 | ||
2069 | int unit_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2070 | int r; | |
2071 | ||
2072 | assert(u); | |
2073 | assert(f); | |
2074 | assert(fds); | |
2075 | ||
2076 | if (!unit_can_serialize(u)) | |
2077 | return 0; | |
2078 | ||
2079 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
2080 | return r; | |
2081 | ||
cca098b0 LP |
2082 | if (u->meta.job) |
2083 | unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type)); | |
2084 | ||
10717a1a LP |
2085 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->meta.inactive_exit_timestamp); |
2086 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->meta.active_enter_timestamp); | |
2087 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->meta.active_exit_timestamp); | |
2088 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->meta.inactive_enter_timestamp); | |
2791a8f8 LP |
2089 | dual_timestamp_serialize(f, "condition-timestamp", &u->meta.condition_timestamp); |
2090 | ||
2091 | if (dual_timestamp_is_set(&u->meta.condition_timestamp)) | |
2092 | unit_serialize_item(u, f, "condition-result", yes_no(u->meta.condition_result)); | |
10717a1a | 2093 | |
a16e1123 LP |
2094 | /* End marker */ |
2095 | fputc('\n', f); | |
2096 | return 0; | |
2097 | } | |
2098 | ||
2099 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2100 | va_list ap; | |
2101 | ||
2102 | assert(u); | |
2103 | assert(f); | |
2104 | assert(key); | |
2105 | assert(format); | |
2106 | ||
2107 | fputs(key, f); | |
2108 | fputc('=', f); | |
2109 | ||
2110 | va_start(ap, format); | |
2111 | vfprintf(f, format, ap); | |
2112 | va_end(ap); | |
2113 | ||
2114 | fputc('\n', f); | |
2115 | } | |
2116 | ||
2117 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2118 | assert(u); | |
2119 | assert(f); | |
2120 | assert(key); | |
2121 | assert(value); | |
2122 | ||
2123 | fprintf(f, "%s=%s\n", key, value); | |
2124 | } | |
2125 | ||
2126 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2127 | int r; | |
2128 | ||
2129 | assert(u); | |
2130 | assert(f); | |
2131 | assert(fds); | |
2132 | ||
2133 | if (!unit_can_serialize(u)) | |
2134 | return 0; | |
2135 | ||
2136 | for (;;) { | |
2137 | char line[1024], *l, *v; | |
2138 | size_t k; | |
2139 | ||
2140 | if (!fgets(line, sizeof(line), f)) { | |
2141 | if (feof(f)) | |
2142 | return 0; | |
2143 | return -errno; | |
2144 | } | |
2145 | ||
10f8e83c | 2146 | char_array_0(line); |
a16e1123 LP |
2147 | l = strstrip(line); |
2148 | ||
2149 | /* End marker */ | |
2150 | if (l[0] == 0) | |
2151 | return 0; | |
2152 | ||
2153 | k = strcspn(l, "="); | |
2154 | ||
2155 | if (l[k] == '=') { | |
2156 | l[k] = 0; | |
2157 | v = l+k+1; | |
2158 | } else | |
2159 | v = l+k; | |
2160 | ||
cca098b0 LP |
2161 | if (streq(l, "job")) { |
2162 | JobType type; | |
2163 | ||
2164 | if ((type = job_type_from_string(v)) < 0) | |
2165 | log_debug("Failed to parse job type value %s", v); | |
2166 | else | |
2167 | u->meta.deserialized_job = type; | |
2168 | ||
2169 | continue; | |
8aaf019b | 2170 | } else if (streq(l, "inactive-exit-timestamp")) { |
799fd0fd | 2171 | dual_timestamp_deserialize(v, &u->meta.inactive_exit_timestamp); |
8aaf019b LP |
2172 | continue; |
2173 | } else if (streq(l, "active-enter-timestamp")) { | |
799fd0fd | 2174 | dual_timestamp_deserialize(v, &u->meta.active_enter_timestamp); |
8aaf019b LP |
2175 | continue; |
2176 | } else if (streq(l, "active-exit-timestamp")) { | |
799fd0fd | 2177 | dual_timestamp_deserialize(v, &u->meta.active_exit_timestamp); |
8aaf019b LP |
2178 | continue; |
2179 | } else if (streq(l, "inactive-enter-timestamp")) { | |
799fd0fd | 2180 | dual_timestamp_deserialize(v, &u->meta.inactive_enter_timestamp); |
8aaf019b | 2181 | continue; |
2791a8f8 LP |
2182 | } else if (streq(l, "condition-timestamp")) { |
2183 | dual_timestamp_deserialize(v, &u->meta.condition_timestamp); | |
2184 | continue; | |
2185 | } else if (streq(l, "condition-result")) { | |
2186 | int b; | |
2187 | ||
2188 | if ((b = parse_boolean(v)) < 0) | |
2189 | log_debug("Failed to parse condition result value %s", v); | |
2190 | else | |
2191 | u->meta.condition_result = b; | |
efbac6d2 LP |
2192 | |
2193 | continue; | |
8aaf019b | 2194 | } |
cca098b0 | 2195 | |
a16e1123 LP |
2196 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
2197 | return r; | |
2198 | } | |
2199 | } | |
2200 | ||
6e2ef85b LP |
2201 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2202 | Unit *device; | |
2203 | char *e; | |
2204 | int r; | |
2205 | ||
2206 | assert(u); | |
2207 | ||
2208 | if (!what) | |
2209 | return 0; | |
2210 | ||
2211 | /* Adds in links to the device node that this unit is based on */ | |
2212 | ||
8407a5d0 | 2213 | if (!is_device_path(what)) |
6e2ef85b LP |
2214 | return 0; |
2215 | ||
2216 | if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) | |
2217 | return -ENOMEM; | |
2218 | ||
398ef8ba | 2219 | r = manager_load_unit(u->meta.manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2220 | free(e); |
2221 | ||
2222 | if (r < 0) | |
2223 | return r; | |
2224 | ||
b81884e7 | 2225 | if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BIND_TO, device, true)) < 0) |
6e2ef85b LP |
2226 | return r; |
2227 | ||
2228 | if (wants) | |
2229 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
2230 | return r; | |
2231 | ||
2232 | return 0; | |
2233 | } | |
a16e1123 | 2234 | |
cca098b0 LP |
2235 | int unit_coldplug(Unit *u) { |
2236 | int r; | |
2237 | ||
2238 | assert(u); | |
2239 | ||
2240 | if (UNIT_VTABLE(u)->coldplug) | |
2241 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2242 | return r; | |
2243 | ||
2244 | if (u->meta.deserialized_job >= 0) { | |
e6402d10 | 2245 | if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_IGNORE_DEPENDENCIES, false, NULL, NULL)) < 0) |
cca098b0 LP |
2246 | return r; |
2247 | ||
2248 | u->meta.deserialized_job = _JOB_TYPE_INVALID; | |
2249 | } | |
2250 | ||
2251 | return 0; | |
2252 | } | |
2253 | ||
9e58ff9c LP |
2254 | void unit_status_printf(Unit *u, const char *format, ...) { |
2255 | va_list ap; | |
2256 | ||
2257 | assert(u); | |
2258 | assert(format); | |
2259 | ||
2260 | if (!UNIT_VTABLE(u)->show_status) | |
2261 | return; | |
2262 | ||
2263 | if (u->meta.manager->running_as != MANAGER_SYSTEM) | |
2264 | return; | |
2265 | ||
6faa1114 LP |
2266 | /* If Plymouth is running make sure we show the status, so |
2267 | * that there's something nice to see when people press Esc */ | |
2268 | ||
2269 | if (!u->meta.manager->show_status && !plymouth_running()) | |
9e58ff9c LP |
2270 | return; |
2271 | ||
2272 | if (!manager_is_booting_or_shutting_down(u->meta.manager)) | |
2273 | return; | |
2274 | ||
2275 | va_start(ap, format); | |
2276 | status_vprintf(format, ap); | |
2277 | va_end(ap); | |
2278 | } | |
2279 | ||
45fb0699 LP |
2280 | bool unit_need_daemon_reload(Unit *u) { |
2281 | struct stat st; | |
2282 | ||
2283 | assert(u); | |
2284 | ||
2285 | if (!u->meta.fragment_path) | |
2286 | return false; | |
2287 | ||
2288 | zero(st); | |
2289 | if (stat(u->meta.fragment_path, &st) < 0) | |
2290 | /* What, cannot access this anymore? */ | |
2291 | return true; | |
2292 | ||
2293 | return | |
2294 | u->meta.fragment_mtime && | |
2295 | timespec_load(&st.st_mtim) != u->meta.fragment_mtime; | |
2296 | } | |
2297 | ||
fdf20a31 | 2298 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2299 | assert(u); |
2300 | ||
fdf20a31 MM |
2301 | if (UNIT_VTABLE(u)->reset_failed) |
2302 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2303 | } |
2304 | ||
a7f241db LP |
2305 | Unit *unit_following(Unit *u) { |
2306 | assert(u); | |
2307 | ||
2308 | if (UNIT_VTABLE(u)->following) | |
2309 | return UNIT_VTABLE(u)->following(u); | |
2310 | ||
2311 | return NULL; | |
2312 | } | |
2313 | ||
18ffdfda LP |
2314 | bool unit_pending_inactive(Unit *u) { |
2315 | assert(u); | |
2316 | ||
2317 | /* Returns true if the unit is inactive or going down */ | |
2318 | ||
2319 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
2320 | return true; | |
2321 | ||
2322 | if (u->meta.job && u->meta.job->type == JOB_STOP) | |
2323 | return true; | |
2324 | ||
2325 | return false; | |
2326 | } | |
2327 | ||
f976f3f6 LP |
2328 | bool unit_pending_active(Unit *u) { |
2329 | assert(u); | |
2330 | ||
2331 | /* Returns true if the unit is inactive or going down */ | |
2332 | ||
2333 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2334 | return true; | |
2335 | ||
2336 | if (u->meta.job && | |
2337 | (u->meta.job->type == JOB_START || | |
2338 | u->meta.job->type == JOB_RELOAD_OR_START || | |
2339 | u->meta.job->type == JOB_RESTART)) | |
2340 | return true; | |
2341 | ||
2342 | return false; | |
2343 | } | |
2344 | ||
71fad675 LP |
2345 | UnitType unit_name_to_type(const char *n) { |
2346 | UnitType t; | |
2347 | ||
2348 | assert(n); | |
2349 | ||
2350 | for (t = 0; t < _UNIT_TYPE_MAX; t++) | |
2351 | if (endswith(n, unit_vtable[t]->suffix)) | |
2352 | return t; | |
2353 | ||
2354 | return _UNIT_TYPE_INVALID; | |
2355 | } | |
2356 | ||
b9c0d441 | 2357 | bool unit_name_is_valid(const char *n, bool template_ok) { |
71fad675 LP |
2358 | UnitType t; |
2359 | ||
2360 | t = unit_name_to_type(n); | |
2361 | if (t < 0 || t >= _UNIT_TYPE_MAX) | |
2362 | return false; | |
2363 | ||
b9c0d441 | 2364 | return unit_name_is_valid_no_type(n, template_ok); |
71fad675 LP |
2365 | } |
2366 | ||
8a0867d6 LP |
2367 | int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error) { |
2368 | assert(u); | |
2369 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
2370 | assert(m >= 0 && m < _KILL_MODE_MAX); | |
2371 | assert(signo > 0); | |
2372 | assert(signo < _NSIG); | |
2373 | ||
2374 | if (m == KILL_NONE) | |
2375 | return 0; | |
2376 | ||
2377 | if (!UNIT_VTABLE(u)->kill) | |
2378 | return -ENOTSUP; | |
2379 | ||
2380 | return UNIT_VTABLE(u)->kill(u, w, m, signo, error); | |
2381 | } | |
2382 | ||
6210e7fc LP |
2383 | |
2384 | int unit_following_set(Unit *u, Set **s) { | |
2385 | assert(u); | |
2386 | assert(s); | |
2387 | ||
2388 | if (UNIT_VTABLE(u)->following_set) | |
2389 | return UNIT_VTABLE(u)->following_set(u, s); | |
2390 | ||
2391 | *s = NULL; | |
2392 | return 0; | |
2393 | } | |
2394 | ||
94f04347 LP |
2395 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { |
2396 | [UNIT_STUB] = "stub", | |
2397 | [UNIT_LOADED] = "loaded", | |
fdf20a31 | 2398 | [UNIT_ERROR] = "error", |
00dc5d76 | 2399 | [UNIT_MERGED] = "merged", |
6daf4f90 | 2400 | [UNIT_MASKED] = "masked" |
94f04347 LP |
2401 | }; |
2402 | ||
2403 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
2404 | ||
2405 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
2406 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2407 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2408 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2409 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2410 | [UNIT_ACTIVATING] = "activating", |
2411 | [UNIT_DEACTIVATING] = "deactivating" | |
2412 | }; | |
2413 | ||
2414 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2415 | ||
2416 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2417 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2418 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 LP |
2419 | [UNIT_WANTS] = "Wants", |
2420 | [UNIT_REQUISITE] = "Requisite", | |
9e2f7c11 | 2421 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
94f04347 | 2422 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2423 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
b81884e7 | 2424 | [UNIT_BIND_TO] = "BindTo", |
94f04347 LP |
2425 | [UNIT_WANTED_BY] = "WantedBy", |
2426 | [UNIT_CONFLICTS] = "Conflicts", | |
69dd2852 | 2427 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
b81884e7 | 2428 | [UNIT_BOUND_BY] = "BoundBy", |
94f04347 LP |
2429 | [UNIT_BEFORE] = "Before", |
2430 | [UNIT_AFTER] = "After", | |
701cc384 | 2431 | [UNIT_REFERENCES] = "References", |
5de9682c LP |
2432 | [UNIT_REFERENCED_BY] = "ReferencedBy", |
2433 | [UNIT_ON_FAILURE] = "OnFailure" | |
94f04347 LP |
2434 | }; |
2435 | ||
2436 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |