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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" |
ab1f0633 | 45 | #include "cgroup-attr.h" |
87f0e418 LP |
46 | |
47 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
48 | [UNIT_SERVICE] = &service_vtable, | |
49 | [UNIT_TIMER] = &timer_vtable, | |
50 | [UNIT_SOCKET] = &socket_vtable, | |
51 | [UNIT_TARGET] = &target_vtable, | |
52 | [UNIT_DEVICE] = &device_vtable, | |
53 | [UNIT_MOUNT] = &mount_vtable, | |
54 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 55 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
56 | [UNIT_SWAP] = &swap_vtable, |
57 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
58 | }; |
59 | ||
7d17cfbc | 60 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
61 | Unit *u; |
62 | ||
63 | assert(m); | |
ac155bb8 | 64 | assert(size >= sizeof(Unit)); |
87f0e418 | 65 | |
7d17cfbc MS |
66 | u = malloc0(size); |
67 | if (!u) | |
87f0e418 LP |
68 | return NULL; |
69 | ||
ac155bb8 MS |
70 | u->names = set_new(string_hash_func, string_compare_func); |
71 | if (!u->names) { | |
87f0e418 LP |
72 | free(u); |
73 | return NULL; | |
74 | } | |
75 | ||
ac155bb8 MS |
76 | u->manager = m; |
77 | u->type = _UNIT_TYPE_INVALID; | |
78 | u->deserialized_job = _JOB_TYPE_INVALID; | |
79 | u->default_dependencies = true; | |
80 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
87f0e418 LP |
81 | |
82 | return u; | |
83 | } | |
84 | ||
f278026d LP |
85 | bool unit_has_name(Unit *u, const char *name) { |
86 | assert(u); | |
87 | assert(name); | |
88 | ||
ac155bb8 | 89 | return !!set_get(u->names, (char*) name); |
f278026d LP |
90 | } |
91 | ||
87f0e418 LP |
92 | int unit_add_name(Unit *u, const char *text) { |
93 | UnitType t; | |
276c3e78 | 94 | char *s, *i = NULL; |
87f0e418 LP |
95 | int r; |
96 | ||
97 | assert(u); | |
98 | assert(text); | |
99 | ||
9e2f7c11 | 100 | if (unit_name_is_template(text)) { |
ac155bb8 | 101 | if (!u->instance) |
9e2f7c11 | 102 | return -EINVAL; |
87f0e418 | 103 | |
ac155bb8 | 104 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
105 | } else |
106 | s = strdup(text); | |
87f0e418 | 107 | |
9e2f7c11 LP |
108 | if (!s) |
109 | return -ENOMEM; | |
87f0e418 | 110 | |
b9c0d441 | 111 | if (!unit_name_is_valid(s, false)) { |
9e2f7c11 LP |
112 | r = -EINVAL; |
113 | goto fail; | |
114 | } | |
e537352b | 115 | |
9e2f7c11 | 116 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 117 | |
ac155bb8 | 118 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) { |
9e2f7c11 LP |
119 | r = -EINVAL; |
120 | goto fail; | |
121 | } | |
87f0e418 | 122 | |
9e2f7c11 LP |
123 | if ((r = unit_name_to_instance(s, &i)) < 0) |
124 | goto fail; | |
87f0e418 | 125 | |
796ba554 LP |
126 | if (i && unit_vtable[t]->no_instances) { |
127 | r = -EINVAL; | |
9e2f7c11 | 128 | goto fail; |
796ba554 | 129 | } |
9e2f7c11 | 130 | |
276c3e78 LP |
131 | /* Ensure that this unit is either instanced or not instanced, |
132 | * but not both. */ | |
ac155bb8 | 133 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) { |
9e2f7c11 LP |
134 | r = -EINVAL; |
135 | goto fail; | |
136 | } | |
137 | ||
138 | if (unit_vtable[t]->no_alias && | |
ac155bb8 MS |
139 | !set_isempty(u->names) && |
140 | !set_get(u->names, s)) { | |
9e2f7c11 LP |
141 | r = -EEXIST; |
142 | goto fail; | |
143 | } | |
144 | ||
ac155bb8 | 145 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) { |
4f0f902f LP |
146 | r = -E2BIG; |
147 | goto fail; | |
148 | } | |
149 | ||
ac155bb8 | 150 | if ((r = set_put(u->names, s)) < 0) { |
9e2f7c11 LP |
151 | if (r == -EEXIST) |
152 | r = 0; | |
153 | goto fail; | |
87f0e418 LP |
154 | } |
155 | ||
ac155bb8 MS |
156 | if ((r = hashmap_put(u->manager->units, s, u)) < 0) { |
157 | set_remove(u->names, s); | |
9e2f7c11 | 158 | goto fail; |
87f0e418 LP |
159 | } |
160 | ||
ac155bb8 | 161 | if (u->type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 162 | |
ac155bb8 MS |
163 | u->type = t; |
164 | u->id = s; | |
165 | u->instance = i; | |
9e2f7c11 | 166 | |
ac155bb8 | 167 | LIST_PREPEND(Unit, units_by_type, u->manager->units_by_type[t], u); |
e537352b LP |
168 | |
169 | if (UNIT_VTABLE(u)->init) | |
170 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
171 | } else |
172 | free(i); | |
87f0e418 | 173 | |
c1e1601e | 174 | unit_add_to_dbus_queue(u); |
87f0e418 | 175 | return 0; |
9e2f7c11 LP |
176 | |
177 | fail: | |
178 | free(s); | |
179 | free(i); | |
180 | ||
181 | return r; | |
87f0e418 LP |
182 | } |
183 | ||
0ae97ec1 | 184 | int unit_choose_id(Unit *u, const char *name) { |
276c3e78 LP |
185 | char *s, *t = NULL, *i; |
186 | int r; | |
0ae97ec1 LP |
187 | |
188 | assert(u); | |
189 | assert(name); | |
190 | ||
9e2f7c11 LP |
191 | if (unit_name_is_template(name)) { |
192 | ||
ac155bb8 | 193 | if (!u->instance) |
9e2f7c11 LP |
194 | return -EINVAL; |
195 | ||
ac155bb8 | 196 | if (!(t = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
197 | return -ENOMEM; |
198 | ||
199 | name = t; | |
200 | } | |
201 | ||
0ae97ec1 | 202 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 203 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 204 | free(t); |
0ae97ec1 | 205 | |
9e2f7c11 | 206 | if (!s) |
0ae97ec1 LP |
207 | return -ENOENT; |
208 | ||
276c3e78 LP |
209 | if ((r = unit_name_to_instance(s, &i)) < 0) |
210 | return r; | |
211 | ||
ac155bb8 | 212 | u->id = s; |
276c3e78 | 213 | |
ac155bb8 MS |
214 | free(u->instance); |
215 | u->instance = i; | |
276c3e78 | 216 | |
c1e1601e | 217 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 218 | |
0ae97ec1 LP |
219 | return 0; |
220 | } | |
221 | ||
f50e0a01 LP |
222 | int unit_set_description(Unit *u, const char *description) { |
223 | char *s; | |
224 | ||
225 | assert(u); | |
226 | ||
227 | if (!(s = strdup(description))) | |
228 | return -ENOMEM; | |
229 | ||
ac155bb8 MS |
230 | free(u->description); |
231 | u->description = s; | |
c1e1601e LP |
232 | |
233 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
234 | return 0; |
235 | } | |
236 | ||
701cc384 LP |
237 | bool unit_check_gc(Unit *u) { |
238 | assert(u); | |
239 | ||
ac155bb8 | 240 | if (u->load_state == UNIT_STUB) |
b86d44e5 LP |
241 | return true; |
242 | ||
701cc384 LP |
243 | if (UNIT_VTABLE(u)->no_gc) |
244 | return true; | |
245 | ||
ac155bb8 | 246 | if (u->no_gc) |
6c073082 LP |
247 | return true; |
248 | ||
ac155bb8 | 249 | if (u->job) |
701cc384 LP |
250 | return true; |
251 | ||
252 | if (unit_active_state(u) != UNIT_INACTIVE) | |
253 | return true; | |
254 | ||
255 | if (UNIT_VTABLE(u)->check_gc) | |
256 | if (UNIT_VTABLE(u)->check_gc(u)) | |
257 | return true; | |
258 | ||
259 | return false; | |
260 | } | |
261 | ||
87f0e418 LP |
262 | void unit_add_to_load_queue(Unit *u) { |
263 | assert(u); | |
ac155bb8 | 264 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 265 | |
ac155bb8 | 266 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
267 | return; |
268 | ||
ac155bb8 MS |
269 | LIST_PREPEND(Unit, load_queue, u->manager->load_queue, u); |
270 | u->in_load_queue = true; | |
87f0e418 LP |
271 | } |
272 | ||
23a177ef LP |
273 | void unit_add_to_cleanup_queue(Unit *u) { |
274 | assert(u); | |
275 | ||
ac155bb8 | 276 | if (u->in_cleanup_queue) |
23a177ef LP |
277 | return; |
278 | ||
ac155bb8 MS |
279 | LIST_PREPEND(Unit, cleanup_queue, u->manager->cleanup_queue, u); |
280 | u->in_cleanup_queue = true; | |
23a177ef LP |
281 | } |
282 | ||
701cc384 LP |
283 | void unit_add_to_gc_queue(Unit *u) { |
284 | assert(u); | |
285 | ||
ac155bb8 | 286 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
287 | return; |
288 | ||
289 | if (unit_check_gc(u)) | |
290 | return; | |
291 | ||
ac155bb8 MS |
292 | LIST_PREPEND(Unit, gc_queue, u->manager->gc_queue, u); |
293 | u->in_gc_queue = true; | |
701cc384 | 294 | |
ac155bb8 | 295 | u->manager->n_in_gc_queue ++; |
701cc384 | 296 | |
ac155bb8 MS |
297 | if (u->manager->gc_queue_timestamp <= 0) |
298 | u->manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
701cc384 LP |
299 | } |
300 | ||
c1e1601e LP |
301 | void unit_add_to_dbus_queue(Unit *u) { |
302 | assert(u); | |
ac155bb8 | 303 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 304 | |
ac155bb8 | 305 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
306 | return; |
307 | ||
a567261a | 308 | /* Shortcut things if nobody cares */ |
ac155bb8 MS |
309 | if (!bus_has_subscriber(u->manager)) { |
310 | u->sent_dbus_new_signal = true; | |
94b6dfa2 LP |
311 | return; |
312 | } | |
313 | ||
ac155bb8 MS |
314 | LIST_PREPEND(Unit, dbus_queue, u->manager->dbus_unit_queue, u); |
315 | u->in_dbus_queue = true; | |
c1e1601e LP |
316 | } |
317 | ||
87f0e418 LP |
318 | static void bidi_set_free(Unit *u, Set *s) { |
319 | Iterator i; | |
320 | Unit *other; | |
321 | ||
322 | assert(u); | |
323 | ||
324 | /* Frees the set and makes sure we are dropped from the | |
325 | * inverse pointers */ | |
326 | ||
327 | SET_FOREACH(other, s, i) { | |
328 | UnitDependency d; | |
329 | ||
330 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 331 | set_remove(other->dependencies[d], u); |
701cc384 LP |
332 | |
333 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
334 | } |
335 | ||
336 | set_free(s); | |
337 | } | |
338 | ||
339 | void unit_free(Unit *u) { | |
340 | UnitDependency d; | |
341 | Iterator i; | |
342 | char *t; | |
343 | ||
344 | assert(u); | |
345 | ||
c1e1601e LP |
346 | bus_unit_send_removed_signal(u); |
347 | ||
ac155bb8 | 348 | if (u->load_state != UNIT_STUB) |
a013b84b LP |
349 | if (UNIT_VTABLE(u)->done) |
350 | UNIT_VTABLE(u)->done(u); | |
351 | ||
ac155bb8 MS |
352 | SET_FOREACH(t, u->names, i) |
353 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 354 | |
ac155bb8 MS |
355 | if (u->job) |
356 | job_free(u->job); | |
964e0949 LP |
357 | |
358 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 359 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 360 | |
ac155bb8 MS |
361 | if (u->type != _UNIT_TYPE_INVALID) |
362 | LIST_REMOVE(Unit, units_by_type, u->manager->units_by_type[u->type], u); | |
ef734fd6 | 363 | |
ac155bb8 MS |
364 | if (u->in_load_queue) |
365 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
87f0e418 | 366 | |
ac155bb8 MS |
367 | if (u->in_dbus_queue) |
368 | LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u); | |
c1e1601e | 369 | |
ac155bb8 MS |
370 | if (u->in_cleanup_queue) |
371 | LIST_REMOVE(Unit, cleanup_queue, u->manager->cleanup_queue, u); | |
23a177ef | 372 | |
ac155bb8 MS |
373 | if (u->in_gc_queue) { |
374 | LIST_REMOVE(Unit, gc_queue, u->manager->gc_queue, u); | |
375 | u->manager->n_in_gc_queue--; | |
701cc384 LP |
376 | } |
377 | ||
ac155bb8 MS |
378 | cgroup_bonding_free_list(u->cgroup_bondings, u->manager->n_reloading <= 0); |
379 | cgroup_attribute_free_list(u->cgroup_attributes); | |
87f0e418 | 380 | |
ac155bb8 MS |
381 | free(u->description); |
382 | free(u->fragment_path); | |
383 | free(u->instance); | |
87f0e418 | 384 | |
ac155bb8 | 385 | set_free_free(u->names); |
87f0e418 | 386 | |
ac155bb8 | 387 | condition_free_list(u->conditions); |
52661efd | 388 | |
ac155bb8 MS |
389 | while (u->refs) |
390 | unit_ref_unset(u->refs); | |
57020a3a | 391 | |
87f0e418 LP |
392 | free(u); |
393 | } | |
394 | ||
395 | UnitActiveState unit_active_state(Unit *u) { | |
396 | assert(u); | |
397 | ||
ac155bb8 | 398 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
399 | return unit_active_state(unit_follow_merge(u)); |
400 | ||
401 | /* After a reload it might happen that a unit is not correctly | |
402 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 403 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
404 | |
405 | return UNIT_VTABLE(u)->active_state(u); | |
406 | } | |
407 | ||
10a94420 LP |
408 | const char* unit_sub_state_to_string(Unit *u) { |
409 | assert(u); | |
410 | ||
411 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
412 | } | |
413 | ||
23a177ef LP |
414 | static void complete_move(Set **s, Set **other) { |
415 | assert(s); | |
416 | assert(other); | |
87f0e418 | 417 | |
23a177ef LP |
418 | if (!*other) |
419 | return; | |
87f0e418 LP |
420 | |
421 | if (*s) | |
23a177ef LP |
422 | set_move(*s, *other); |
423 | else { | |
424 | *s = *other; | |
425 | *other = NULL; | |
426 | } | |
427 | } | |
87f0e418 | 428 | |
23a177ef LP |
429 | static void merge_names(Unit *u, Unit *other) { |
430 | char *t; | |
431 | Iterator i; | |
87f0e418 | 432 | |
23a177ef LP |
433 | assert(u); |
434 | assert(other); | |
435 | ||
ac155bb8 | 436 | complete_move(&u->names, &other->names); |
23a177ef | 437 | |
ac155bb8 MS |
438 | set_free_free(other->names); |
439 | other->names = NULL; | |
440 | other->id = NULL; | |
23a177ef | 441 | |
ac155bb8 MS |
442 | SET_FOREACH(t, u->names, i) |
443 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
87f0e418 LP |
444 | } |
445 | ||
23a177ef LP |
446 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
447 | Iterator i; | |
448 | Unit *back; | |
87f0e418 | 449 | int r; |
23a177ef LP |
450 | |
451 | assert(u); | |
452 | assert(other); | |
453 | assert(d < _UNIT_DEPENDENCY_MAX); | |
454 | ||
83a95334 | 455 | /* Fix backwards pointers */ |
ac155bb8 | 456 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
457 | UnitDependency k; |
458 | ||
459 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
ac155bb8 | 460 | if ((r = set_remove_and_put(back->dependencies[k], other, u)) < 0) { |
23a177ef LP |
461 | |
462 | if (r == -EEXIST) | |
ac155bb8 | 463 | set_remove(back->dependencies[k], other); |
23a177ef LP |
464 | else |
465 | assert(r == -ENOENT); | |
466 | } | |
467 | } | |
468 | ||
ac155bb8 | 469 | complete_move(&u->dependencies[d], &other->dependencies[d]); |
23a177ef | 470 | |
ac155bb8 MS |
471 | set_free(other->dependencies[d]); |
472 | other->dependencies[d] = NULL; | |
23a177ef LP |
473 | } |
474 | ||
475 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
476 | UnitDependency d; |
477 | ||
478 | assert(u); | |
479 | assert(other); | |
ac155bb8 MS |
480 | assert(u->manager == other->manager); |
481 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 482 | |
cc916967 LP |
483 | other = unit_follow_merge(other); |
484 | ||
23a177ef LP |
485 | if (other == u) |
486 | return 0; | |
487 | ||
ac155bb8 | 488 | if (u->type != other->type) |
9e2f7c11 LP |
489 | return -EINVAL; |
490 | ||
ac155bb8 | 491 | if (!u->instance != !other->instance) |
87f0e418 LP |
492 | return -EINVAL; |
493 | ||
ac155bb8 MS |
494 | if (other->load_state != UNIT_STUB && |
495 | other->load_state != UNIT_ERROR) | |
23a177ef | 496 | return -EEXIST; |
87f0e418 | 497 | |
ac155bb8 | 498 | if (other->job) |
819e213f LP |
499 | return -EEXIST; |
500 | ||
fdf20a31 | 501 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
502 | return -EEXIST; |
503 | ||
87f0e418 | 504 | /* Merge names */ |
23a177ef | 505 | merge_names(u, other); |
87f0e418 | 506 | |
57020a3a | 507 | /* Redirect all references */ |
ac155bb8 MS |
508 | while (other->refs) |
509 | unit_ref_set(other->refs, u); | |
57020a3a | 510 | |
87f0e418 LP |
511 | /* Merge dependencies */ |
512 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 513 | merge_dependencies(u, other, d); |
87f0e418 | 514 | |
ac155bb8 MS |
515 | other->load_state = UNIT_MERGED; |
516 | other->merged_into = u; | |
23a177ef | 517 | |
3616a49c LP |
518 | /* If there is still some data attached to the other node, we |
519 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 520 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
521 | if (UNIT_VTABLE(other)->done) |
522 | UNIT_VTABLE(other)->done(other); | |
523 | ||
524 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
525 | unit_add_to_cleanup_queue(other); |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | int unit_merge_by_name(Unit *u, const char *name) { | |
531 | Unit *other; | |
9e2f7c11 LP |
532 | int r; |
533 | char *s = NULL; | |
23a177ef LP |
534 | |
535 | assert(u); | |
536 | assert(name); | |
537 | ||
9e2f7c11 | 538 | if (unit_name_is_template(name)) { |
ac155bb8 | 539 | if (!u->instance) |
9e2f7c11 LP |
540 | return -EINVAL; |
541 | ||
ac155bb8 | 542 | if (!(s = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
543 | return -ENOMEM; |
544 | ||
545 | name = s; | |
546 | } | |
547 | ||
ac155bb8 | 548 | if (!(other = manager_get_unit(u->manager, name))) |
9e2f7c11 LP |
549 | r = unit_add_name(u, name); |
550 | else | |
551 | r = unit_merge(u, other); | |
23a177ef | 552 | |
9e2f7c11 LP |
553 | free(s); |
554 | return r; | |
23a177ef LP |
555 | } |
556 | ||
557 | Unit* unit_follow_merge(Unit *u) { | |
558 | assert(u); | |
559 | ||
ac155bb8 MS |
560 | while (u->load_state == UNIT_MERGED) |
561 | assert_se(u = u->merged_into); | |
23a177ef LP |
562 | |
563 | return u; | |
564 | } | |
565 | ||
566 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
567 | int r; | |
568 | ||
569 | assert(u); | |
570 | assert(c); | |
571 | ||
ecc6e2b8 LP |
572 | if (c->std_output != EXEC_OUTPUT_KMSG && |
573 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 574 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
575 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
576 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 577 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 578 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 579 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 580 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 581 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 582 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 583 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
584 | return 0; |
585 | ||
586 | /* If syslog or kernel logging is requested, make sure our own | |
587 | * logging daemon is run first. */ | |
588 | ||
ac155bb8 | 589 | if (u->manager->running_as == MANAGER_SYSTEM) |
54fe0cdb | 590 | if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true)) < 0) |
23a177ef LP |
591 | return r; |
592 | ||
87f0e418 LP |
593 | return 0; |
594 | } | |
595 | ||
87f0e418 LP |
596 | const char *unit_description(Unit *u) { |
597 | assert(u); | |
598 | ||
ac155bb8 MS |
599 | if (u->description) |
600 | return u->description; | |
87f0e418 | 601 | |
ac155bb8 | 602 | return strna(u->id); |
87f0e418 LP |
603 | } |
604 | ||
605 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
87f0e418 LP |
606 | char *t; |
607 | UnitDependency d; | |
608 | Iterator i; | |
47be870b LP |
609 | char *p2; |
610 | const char *prefix2; | |
173e3821 LP |
611 | char |
612 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
613 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
614 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
615 | timestamp4[FORMAT_TIMESTAMP_MAX], |
616 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 617 | Unit *following; |
87f0e418 LP |
618 | |
619 | assert(u); | |
ac155bb8 | 620 | assert(u->type >= 0); |
87f0e418 LP |
621 | |
622 | if (!prefix) | |
623 | prefix = ""; | |
47be870b LP |
624 | p2 = strappend(prefix, "\t"); |
625 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
626 | |
627 | fprintf(f, | |
40d50879 | 628 | "%s-> Unit %s:\n" |
87f0e418 | 629 | "%s\tDescription: %s\n" |
9e2f7c11 | 630 | "%s\tInstance: %s\n" |
87f0e418 | 631 | "%s\tUnit Load State: %s\n" |
2fad8195 | 632 | "%s\tUnit Active State: %s\n" |
173e3821 | 633 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 634 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 635 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 636 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 LP |
637 | "%s\tGC Check Good: %s\n" |
638 | "%s\tNeed Daemon Reload: %s\n", | |
ac155bb8 | 639 | prefix, u->id, |
87f0e418 | 640 | prefix, unit_description(u), |
ac155bb8 MS |
641 | prefix, strna(u->instance), |
642 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 643 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
644 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
645 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
646 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
647 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 LP |
648 | prefix, yes_no(unit_check_gc(u)), |
649 | prefix, yes_no(unit_need_daemon_reload(u))); | |
0301abf4 | 650 | |
ac155bb8 | 651 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
652 | fprintf(f, "%s\tName: %s\n", prefix, t); |
653 | ||
a7f241db | 654 | if ((following = unit_following(u))) |
ac155bb8 | 655 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 656 | |
ac155bb8 MS |
657 | if (u->fragment_path) |
658 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 659 | |
ac155bb8 MS |
660 | if (u->job_timeout > 0) |
661 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout)); | |
faf919f1 | 662 | |
ac155bb8 | 663 | condition_dump_list(u->conditions, f, prefix); |
52661efd | 664 | |
ac155bb8 | 665 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
666 | fprintf(f, |
667 | "%s\tCondition Timestamp: %s\n" | |
668 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
669 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
670 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 671 | |
87f0e418 LP |
672 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
673 | Unit *other; | |
674 | ||
ac155bb8 MS |
675 | SET_FOREACH(other, u->dependencies[d], i) |
676 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
677 | } |
678 | ||
ac155bb8 | 679 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 LP |
680 | CGroupBonding *b; |
681 | CGroupAttribute *a; | |
682 | ||
b0650475 | 683 | fprintf(f, |
a40eb732 | 684 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
685 | "%s\tRefuseManualStart: %s\n" |
686 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 687 | "%s\tDefaultDependencies: %s\n" |
c8f4d764 | 688 | "%s\tOnFailureIsolate: %s\n" |
7a6000a6 LP |
689 | "%s\tIgnoreOnIsolate: %s\n" |
690 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
691 | prefix, yes_no(u->stop_when_unneeded), |
692 | prefix, yes_no(u->refuse_manual_start), | |
693 | prefix, yes_no(u->refuse_manual_stop), | |
694 | prefix, yes_no(u->default_dependencies), | |
695 | prefix, yes_no(u->on_failure_isolate), | |
696 | prefix, yes_no(u->ignore_on_isolate), | |
697 | prefix, yes_no(u->ignore_on_snapshot)); | |
698 | ||
699 | LIST_FOREACH(by_unit, b, u->cgroup_bondings) | |
23a177ef LP |
700 | fprintf(f, "%s\tControlGroup: %s:%s\n", |
701 | prefix, b->controller, b->path); | |
8e274523 | 702 | |
ac155bb8 | 703 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) { |
d8bbda91 LP |
704 | char *v = NULL; |
705 | ||
706 | if (a->map_callback) | |
707 | a->map_callback(a->controller, a->name, a->value, &v); | |
708 | ||
ab1f0633 | 709 | fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n", |
d8bbda91 LP |
710 | prefix, a->controller, a->name, v ? v : a->value); |
711 | ||
712 | free(v); | |
713 | } | |
ab1f0633 | 714 | |
23a177ef LP |
715 | if (UNIT_VTABLE(u)->dump) |
716 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 717 | |
ac155bb8 | 718 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
719 | fprintf(f, |
720 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
721 | prefix, u->merged_into->id); |
722 | else if (u->load_state == UNIT_ERROR) | |
723 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 724 | |
87f0e418 | 725 | |
ac155bb8 MS |
726 | if (u->job) |
727 | job_dump(u->job, f, prefix2); | |
87f0e418 | 728 | |
47be870b | 729 | free(p2); |
87f0e418 LP |
730 | } |
731 | ||
732 | /* Common implementation for multiple backends */ | |
e537352b | 733 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
734 | int r; |
735 | ||
736 | assert(u); | |
23a177ef LP |
737 | |
738 | /* Load a .service file */ | |
e537352b | 739 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
740 | return r; |
741 | ||
ac155bb8 | 742 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
743 | return -ENOENT; |
744 | ||
745 | /* Load drop-in directory data */ | |
746 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
747 | return r; | |
748 | ||
749 | return 0; | |
750 | } | |
751 | ||
752 | /* Common implementation for multiple backends */ | |
e537352b | 753 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 754 | int r; |
87f0e418 LP |
755 | |
756 | assert(u); | |
757 | ||
23a177ef LP |
758 | /* Same as unit_load_fragment_and_dropin(), but whether |
759 | * something can be loaded or not doesn't matter. */ | |
760 | ||
761 | /* Load a .service file */ | |
e537352b | 762 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
763 | return r; |
764 | ||
ac155bb8 MS |
765 | if (u->load_state == UNIT_STUB) |
766 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 767 | |
87f0e418 | 768 | /* Load drop-in directory data */ |
23a177ef | 769 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
770 | return r; |
771 | ||
23a177ef | 772 | return 0; |
87f0e418 LP |
773 | } |
774 | ||
bba34eed | 775 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
776 | assert(u); |
777 | assert(target); | |
778 | ||
ac155bb8 | 779 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
780 | return 0; |
781 | ||
35b8ca3a | 782 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 783 | * that loop check below is reliable */ |
ac155bb8 MS |
784 | if (u->load_state != UNIT_LOADED || |
785 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
786 | return 0; |
787 | ||
21256a2b LP |
788 | /* If either side wants no automatic dependencies, then let's |
789 | * skip this */ | |
ac155bb8 MS |
790 | if (!u->default_dependencies || |
791 | !target->default_dependencies) | |
21256a2b LP |
792 | return 0; |
793 | ||
98bc2000 | 794 | /* Don't create loops */ |
ac155bb8 | 795 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
796 | return 0; |
797 | ||
798 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
799 | } | |
800 | ||
801 | static int unit_add_default_dependencies(Unit *u) { | |
21256a2b LP |
802 | static const UnitDependency deps[] = { |
803 | UNIT_REQUIRED_BY, | |
804 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
805 | UNIT_WANTED_BY, | |
806 | UNIT_BOUND_BY | |
807 | }; | |
808 | ||
bba34eed | 809 | Unit *target; |
98bc2000 LP |
810 | Iterator i; |
811 | int r; | |
21256a2b | 812 | unsigned k; |
98bc2000 LP |
813 | |
814 | assert(u); | |
815 | ||
21256a2b | 816 | for (k = 0; k < ELEMENTSOF(deps); k++) |
ac155bb8 | 817 | SET_FOREACH(target, u->dependencies[deps[k]], i) |
21256a2b LP |
818 | if ((r = unit_add_default_target_dependency(u, target)) < 0) |
819 | return r; | |
b81884e7 | 820 | |
98bc2000 LP |
821 | return 0; |
822 | } | |
823 | ||
87f0e418 LP |
824 | int unit_load(Unit *u) { |
825 | int r; | |
826 | ||
827 | assert(u); | |
828 | ||
ac155bb8 MS |
829 | if (u->in_load_queue) { |
830 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
831 | u->in_load_queue = false; | |
87f0e418 LP |
832 | } |
833 | ||
ac155bb8 | 834 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
835 | return -EINVAL; |
836 | ||
ac155bb8 | 837 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
838 | return 0; |
839 | ||
e537352b LP |
840 | if (UNIT_VTABLE(u)->load) |
841 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 842 | goto fail; |
23a177ef | 843 | |
ac155bb8 | 844 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
845 | r = -ENOENT; |
846 | goto fail; | |
847 | } | |
848 | ||
ac155bb8 MS |
849 | if (u->load_state == UNIT_LOADED && |
850 | u->default_dependencies) | |
98bc2000 LP |
851 | if ((r = unit_add_default_dependencies(u)) < 0) |
852 | goto fail; | |
853 | ||
ac155bb8 MS |
854 | if (u->on_failure_isolate && |
855 | set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { | |
f68319bb LP |
856 | |
857 | log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", | |
ac155bb8 | 858 | u->id); |
f68319bb LP |
859 | |
860 | r = -EINVAL; | |
861 | goto fail; | |
862 | } | |
863 | ||
ac155bb8 | 864 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
865 | |
866 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 867 | unit_add_to_gc_queue(u); |
87f0e418 | 868 | |
87f0e418 LP |
869 | return 0; |
870 | ||
871 | fail: | |
ac155bb8 MS |
872 | u->load_state = UNIT_ERROR; |
873 | u->load_error = r; | |
c1e1601e | 874 | unit_add_to_dbus_queue(u); |
9a46fc3b | 875 | unit_add_to_gc_queue(u); |
23a177ef | 876 | |
ac155bb8 | 877 | log_debug("Failed to load configuration for %s: %s", u->id, strerror(-r)); |
23a177ef | 878 | |
87f0e418 LP |
879 | return r; |
880 | } | |
881 | ||
90bbc946 LP |
882 | bool unit_condition_test(Unit *u) { |
883 | assert(u); | |
884 | ||
ac155bb8 MS |
885 | dual_timestamp_get(&u->condition_timestamp); |
886 | u->condition_result = condition_test_list(u->conditions); | |
90bbc946 | 887 | |
ac155bb8 | 888 | return u->condition_result; |
90bbc946 LP |
889 | } |
890 | ||
87f0e418 | 891 | /* Errors: |
d5159713 LP |
892 | * -EBADR: This unit type does not support starting. |
893 | * -EALREADY: Unit is already started. | |
894 | * -EAGAIN: An operation is already in progress. Retry later. | |
895 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
896 | */ |
897 | int unit_start(Unit *u) { | |
898 | UnitActiveState state; | |
92ab323c | 899 | Unit *following; |
87f0e418 LP |
900 | |
901 | assert(u); | |
902 | ||
ac155bb8 | 903 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
904 | return -EINVAL; |
905 | ||
a82e5507 LP |
906 | /* If this is already started, then this will succeed. Note |
907 | * that this will even succeed if this unit is not startable | |
908 | * by the user. This is relied on to detect when we need to | |
909 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
910 | state = unit_active_state(u); |
911 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
912 | return -EALREADY; | |
913 | ||
a82e5507 LP |
914 | /* If the conditions failed, don't do anything at all. If we |
915 | * already are activating this call might still be useful to | |
916 | * speed up activation in case there is some hold-off time, | |
917 | * but we don't want to recheck the condition in that case. */ | |
918 | if (state != UNIT_ACTIVATING && | |
919 | !unit_condition_test(u)) { | |
ac155bb8 | 920 | log_debug("Starting of %s requested but condition failed. Ignoring.", u->id); |
52661efd LP |
921 | return -EALREADY; |
922 | } | |
923 | ||
92ab323c LP |
924 | /* Forward to the main object, if we aren't it. */ |
925 | if ((following = unit_following(u))) { | |
ac155bb8 | 926 | log_debug("Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
927 | return unit_start(following); |
928 | } | |
929 | ||
930 | /* If it is stopped, but we cannot start it, then fail */ | |
931 | if (!UNIT_VTABLE(u)->start) | |
932 | return -EBADR; | |
933 | ||
87f0e418 LP |
934 | /* We don't suppress calls to ->start() here when we are |
935 | * already starting, to allow this request to be used as a | |
936 | * "hurry up" call, for example when the unit is in some "auto | |
937 | * restart" state where it waits for a holdoff timer to elapse | |
938 | * before it will start again. */ | |
939 | ||
c1e1601e | 940 | unit_add_to_dbus_queue(u); |
9e58ff9c | 941 | |
5831e9b7 | 942 | unit_status_printf(u, NULL, "Starting %s...", unit_description(u)); |
87f0e418 LP |
943 | return UNIT_VTABLE(u)->start(u); |
944 | } | |
945 | ||
946 | bool unit_can_start(Unit *u) { | |
947 | assert(u); | |
948 | ||
949 | return !!UNIT_VTABLE(u)->start; | |
950 | } | |
951 | ||
2528a7a6 LP |
952 | bool unit_can_isolate(Unit *u) { |
953 | assert(u); | |
954 | ||
955 | return unit_can_start(u) && | |
ac155bb8 | 956 | u->allow_isolate; |
2528a7a6 LP |
957 | } |
958 | ||
87f0e418 LP |
959 | /* Errors: |
960 | * -EBADR: This unit type does not support stopping. | |
961 | * -EALREADY: Unit is already stopped. | |
962 | * -EAGAIN: An operation is already in progress. Retry later. | |
963 | */ | |
964 | int unit_stop(Unit *u) { | |
965 | UnitActiveState state; | |
92ab323c | 966 | Unit *following; |
87f0e418 LP |
967 | |
968 | assert(u); | |
969 | ||
87f0e418 | 970 | state = unit_active_state(u); |
fdf20a31 | 971 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
972 | return -EALREADY; |
973 | ||
92ab323c | 974 | if ((following = unit_following(u))) { |
ac155bb8 | 975 | log_debug("Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
976 | return unit_stop(following); |
977 | } | |
978 | ||
7898b0cf LP |
979 | if (!UNIT_VTABLE(u)->stop) |
980 | return -EBADR; | |
981 | ||
c1e1601e | 982 | unit_add_to_dbus_queue(u); |
9e58ff9c | 983 | |
5831e9b7 | 984 | unit_status_printf(u, NULL, "Stopping %s...", unit_description(u)); |
87f0e418 LP |
985 | return UNIT_VTABLE(u)->stop(u); |
986 | } | |
987 | ||
988 | /* Errors: | |
989 | * -EBADR: This unit type does not support reloading. | |
990 | * -ENOEXEC: Unit is not started. | |
991 | * -EAGAIN: An operation is already in progress. Retry later. | |
992 | */ | |
993 | int unit_reload(Unit *u) { | |
994 | UnitActiveState state; | |
92ab323c | 995 | Unit *following; |
87f0e418 LP |
996 | |
997 | assert(u); | |
998 | ||
ac155bb8 | 999 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1000 | return -EINVAL; |
1001 | ||
87f0e418 LP |
1002 | if (!unit_can_reload(u)) |
1003 | return -EBADR; | |
1004 | ||
1005 | state = unit_active_state(u); | |
e364ad06 | 1006 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1007 | return -EALREADY; |
1008 | ||
e364ad06 | 1009 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
1010 | return -ENOEXEC; |
1011 | ||
92ab323c | 1012 | if ((following = unit_following(u))) { |
ac155bb8 | 1013 | log_debug("Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1014 | return unit_reload(following); |
1015 | } | |
1016 | ||
c1e1601e | 1017 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1018 | return UNIT_VTABLE(u)->reload(u); |
1019 | } | |
1020 | ||
1021 | bool unit_can_reload(Unit *u) { | |
1022 | assert(u); | |
1023 | ||
1024 | if (!UNIT_VTABLE(u)->reload) | |
1025 | return false; | |
1026 | ||
1027 | if (!UNIT_VTABLE(u)->can_reload) | |
1028 | return true; | |
1029 | ||
1030 | return UNIT_VTABLE(u)->can_reload(u); | |
1031 | } | |
1032 | ||
b4a16b7b | 1033 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1034 | Iterator i; |
1035 | Unit *other; | |
1036 | ||
1037 | assert(u); | |
1038 | ||
1039 | /* If this service shall be shut down when unneeded then do | |
1040 | * so. */ | |
1041 | ||
ac155bb8 | 1042 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1043 | return; |
1044 | ||
1045 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1046 | return; | |
1047 | ||
ac155bb8 | 1048 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
f60c2665 | 1049 | if (unit_pending_active(other)) |
f3bff0eb LP |
1050 | return; |
1051 | ||
ac155bb8 | 1052 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f60c2665 | 1053 | if (unit_pending_active(other)) |
f3bff0eb LP |
1054 | return; |
1055 | ||
ac155bb8 | 1056 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
f60c2665 | 1057 | if (unit_pending_active(other)) |
f3bff0eb LP |
1058 | return; |
1059 | ||
ac155bb8 | 1060 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
f60c2665 | 1061 | if (unit_pending_active(other)) |
b81884e7 LP |
1062 | return; |
1063 | ||
ac155bb8 | 1064 | log_info("Service %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1065 | |
1066 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1067 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1068 | } |
1069 | ||
87f0e418 LP |
1070 | static void retroactively_start_dependencies(Unit *u) { |
1071 | Iterator i; | |
1072 | Unit *other; | |
1073 | ||
1074 | assert(u); | |
1075 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1076 | ||
ac155bb8 MS |
1077 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1078 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1079 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1080 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1081 | |
ac155bb8 MS |
1082 | SET_FOREACH(other, u->dependencies[UNIT_BIND_TO], i) |
1083 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1084 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1085 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1086 | |
ac155bb8 MS |
1087 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1088 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1089 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1090 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1091 | |
ac155bb8 MS |
1092 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
1093 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1094 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1095 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1096 | |
ac155bb8 MS |
1097 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1098 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1099 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1100 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1101 | |
ac155bb8 | 1102 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1103 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1104 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1105 | |
ac155bb8 | 1106 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1107 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1108 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1109 | } |
1110 | ||
1111 | static void retroactively_stop_dependencies(Unit *u) { | |
1112 | Iterator i; | |
1113 | Unit *other; | |
1114 | ||
1115 | assert(u); | |
1116 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1117 | ||
b81884e7 | 1118 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1119 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1120 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1121 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1122 | } |
1123 | ||
1124 | static void check_unneeded_dependencies(Unit *u) { | |
1125 | Iterator i; | |
1126 | Unit *other; | |
1127 | ||
1128 | assert(u); | |
1129 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1130 | |
1131 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1132 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1133 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1134 | unit_check_unneeded(other); |
ac155bb8 | 1135 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1136 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1137 | unit_check_unneeded(other); |
ac155bb8 | 1138 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1139 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1140 | unit_check_unneeded(other); |
ac155bb8 | 1141 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1142 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1143 | unit_check_unneeded(other); |
ac155bb8 | 1144 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1145 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1146 | unit_check_unneeded(other); |
ac155bb8 | 1147 | SET_FOREACH(other, u->dependencies[UNIT_BIND_TO], i) |
b81884e7 LP |
1148 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1149 | unit_check_unneeded(other); | |
87f0e418 LP |
1150 | } |
1151 | ||
c0daa706 LP |
1152 | void unit_trigger_on_failure(Unit *u) { |
1153 | Unit *other; | |
1154 | Iterator i; | |
1155 | ||
1156 | assert(u); | |
1157 | ||
ac155bb8 | 1158 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1159 | return; |
1160 | ||
ac155bb8 | 1161 | log_info("Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1162 | |
ac155bb8 | 1163 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1164 | int r; |
1165 | ||
ac155bb8 | 1166 | if ((r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0) |
222ae6a8 LP |
1167 | log_error("Failed to enqueue OnFailure= job: %s", strerror(-r)); |
1168 | } | |
c0daa706 LP |
1169 | } |
1170 | ||
e2f3b44c | 1171 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
7e6e7b06 | 1172 | bool unexpected; |
a096ed36 | 1173 | |
87f0e418 LP |
1174 | assert(u); |
1175 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1176 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1177 | |
8e471ccd LP |
1178 | /* Note that this is called for all low-level state changes, |
1179 | * even if they might map to the same high-level | |
1180 | * UnitActiveState! That means that ns == os is OK an expected | |
1181 | * behaviour here. For example: if a mount point is remounted | |
cd6d0a45 | 1182 | * this function will be called too! */ |
87f0e418 | 1183 | |
ac155bb8 | 1184 | if (u->manager->n_reloading <= 0) { |
bdbf9951 | 1185 | dual_timestamp ts; |
173e3821 | 1186 | |
bdbf9951 | 1187 | dual_timestamp_get(&ts); |
173e3821 | 1188 | |
bdbf9951 | 1189 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1190 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1191 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1192 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1193 | |
1194 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1195 | u->active_enter_timestamp = ts; |
bdbf9951 | 1196 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1197 | u->active_exit_timestamp = ts; |
bdbf9951 LP |
1198 | |
1199 | timer_unit_notify(u, ns); | |
1200 | path_unit_notify(u, ns); | |
1201 | } | |
87f0e418 | 1202 | |
fdf20a31 | 1203 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1204 | cgroup_bonding_trim_list(u->cgroup_bondings, true); |
fb385181 | 1205 | |
ac155bb8 | 1206 | if (u->job) { |
7e6e7b06 | 1207 | unexpected = false; |
87f0e418 | 1208 | |
ac155bb8 | 1209 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1210 | |
1211 | /* So we reached a different state for this | |
1212 | * job. Let's see if we can run it now if it | |
1213 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1214 | job_add_to_run_queue(u->job); |
87f0e418 | 1215 | |
b410e6b9 | 1216 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1217 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1218 | * hence needs to invalidate jobs. */ |
87f0e418 | 1219 | |
ac155bb8 | 1220 | switch (u->job->type) { |
87f0e418 | 1221 | |
b410e6b9 LP |
1222 | case JOB_START: |
1223 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1224 | |
b410e6b9 | 1225 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 MS |
1226 | job_finish_and_invalidate(u->job, JOB_DONE); |
1227 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
b410e6b9 | 1228 | unexpected = true; |
41b02ec7 | 1229 | |
fdf20a31 | 1230 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1231 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
b410e6b9 | 1232 | } |
87f0e418 | 1233 | |
b410e6b9 | 1234 | break; |
87f0e418 | 1235 | |
b410e6b9 LP |
1236 | case JOB_RELOAD: |
1237 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1238 | |
ac155bb8 | 1239 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1240 | if (ns == UNIT_ACTIVE) |
ac155bb8 | 1241 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED); |
032ff4af | 1242 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1243 | unexpected = true; |
41b02ec7 | 1244 | |
fdf20a31 | 1245 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1246 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE); |
a096ed36 | 1247 | } |
b410e6b9 | 1248 | } |
87f0e418 | 1249 | |
b410e6b9 | 1250 | break; |
87f0e418 | 1251 | |
b410e6b9 LP |
1252 | case JOB_STOP: |
1253 | case JOB_RESTART: | |
1254 | case JOB_TRY_RESTART: | |
87f0e418 | 1255 | |
fdf20a31 | 1256 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 MS |
1257 | job_finish_and_invalidate(u->job, JOB_DONE); |
1258 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
b410e6b9 | 1259 | unexpected = true; |
ac155bb8 | 1260 | job_finish_and_invalidate(u->job, JOB_FAILED); |
b410e6b9 | 1261 | } |
87f0e418 | 1262 | |
b410e6b9 | 1263 | break; |
87f0e418 | 1264 | |
b410e6b9 LP |
1265 | default: |
1266 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1267 | } |
87f0e418 | 1268 | |
7e6e7b06 LP |
1269 | } else |
1270 | unexpected = true; | |
1271 | ||
ac155bb8 | 1272 | if (u->manager->n_reloading <= 0) { |
f3bff0eb | 1273 | |
bdbf9951 LP |
1274 | /* If this state change happened without being |
1275 | * requested by a job, then let's retroactively start | |
1276 | * or stop dependencies. We skip that step when | |
1277 | * deserializing, since we don't want to create any | |
1278 | * additional jobs just because something is already | |
1279 | * activated. */ | |
1280 | ||
1281 | if (unexpected) { | |
1282 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1283 | retroactively_start_dependencies(u); | |
1284 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1285 | retroactively_stop_dependencies(u); | |
1286 | } | |
5de9682c | 1287 | |
cd0504d0 MS |
1288 | /* stop unneeded units regardless if going down was expected or not */ |
1289 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1290 | check_unneeded_dependencies(u); | |
1291 | ||
bdbf9951 | 1292 | if (ns != os && ns == UNIT_FAILED) { |
ac155bb8 | 1293 | log_notice("Unit %s entered failed state.", u->id); |
bdbf9951 | 1294 | unit_trigger_on_failure(u); |
cd6d0a45 | 1295 | } |
3b2775c5 | 1296 | } |
e537352b | 1297 | |
3b2775c5 LP |
1298 | /* Some names are special */ |
1299 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1300 | ||
1301 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1302 | /* The bus just might have become available, | |
1303 | * hence try to connect to it, if we aren't | |
1304 | * yet connected. */ | |
ac155bb8 | 1305 | bus_init(u->manager, true); |
3b2775c5 | 1306 | |
ac155bb8 | 1307 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1308 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
ac155bb8 | 1309 | u->manager->n_reloading <= 0) { |
3b2775c5 | 1310 | /* Write audit record if we have just finished starting up */ |
ac155bb8 MS |
1311 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); |
1312 | u->in_audit = true; | |
3b2775c5 | 1313 | } |
e983b760 | 1314 | |
3b2775c5 | 1315 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
ac155bb8 | 1316 | manager_send_unit_plymouth(u->manager, u); |
bdbf9951 | 1317 | |
3b2775c5 | 1318 | } else { |
bdbf9951 | 1319 | |
3b2775c5 LP |
1320 | /* We don't care about D-Bus here, since we'll get an |
1321 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1322 | |
ac155bb8 | 1323 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1324 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1325 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
ac155bb8 | 1326 | u->manager->n_reloading <= 0) { |
4927fcae | 1327 | |
3b2775c5 LP |
1328 | /* Hmm, if there was no start record written |
1329 | * write it now, so that we always have a nice | |
1330 | * pair */ | |
ac155bb8 MS |
1331 | if (!u->in_audit) { |
1332 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 1333 | |
3b2775c5 | 1334 | if (ns == UNIT_INACTIVE) |
ac155bb8 | 1335 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1336 | } else |
1337 | /* Write audit record if we have just finished shutting down */ | |
ac155bb8 | 1338 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1339 | |
ac155bb8 | 1340 | u->in_audit = false; |
cd6d0a45 | 1341 | } |
f278026d LP |
1342 | } |
1343 | ||
ac155bb8 | 1344 | manager_recheck_journal(u->manager); |
3b2775c5 | 1345 | |
f3bff0eb LP |
1346 | /* Maybe we finished startup and are now ready for being |
1347 | * stopped because unneeded? */ | |
b4a16b7b | 1348 | unit_check_unneeded(u); |
c1e1601e LP |
1349 | |
1350 | unit_add_to_dbus_queue(u); | |
701cc384 | 1351 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1352 | } |
1353 | ||
acbb0225 | 1354 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1355 | struct epoll_event ev; |
1356 | ||
1357 | assert(u); | |
1358 | assert(fd >= 0); | |
acbb0225 | 1359 | assert(w); |
ea430986 | 1360 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1361 | |
1362 | zero(ev); | |
acbb0225 | 1363 | ev.data.ptr = w; |
87f0e418 LP |
1364 | ev.events = events; |
1365 | ||
ac155bb8 | 1366 | if (epoll_ctl(u->manager->epoll_fd, |
acbb0225 LP |
1367 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, |
1368 | fd, | |
1369 | &ev) < 0) | |
1370 | return -errno; | |
87f0e418 | 1371 | |
acbb0225 LP |
1372 | w->fd = fd; |
1373 | w->type = WATCH_FD; | |
ea430986 | 1374 | w->data.unit = u; |
87f0e418 | 1375 | |
acbb0225 | 1376 | return 0; |
87f0e418 LP |
1377 | } |
1378 | ||
acbb0225 | 1379 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1380 | assert(u); |
acbb0225 | 1381 | assert(w); |
87f0e418 | 1382 | |
acbb0225 LP |
1383 | if (w->type == WATCH_INVALID) |
1384 | return; | |
1385 | ||
ea430986 LP |
1386 | assert(w->type == WATCH_FD); |
1387 | assert(w->data.unit == u); | |
ac155bb8 | 1388 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
acbb0225 LP |
1389 | |
1390 | w->fd = -1; | |
1391 | w->type = WATCH_INVALID; | |
ea430986 | 1392 | w->data.unit = NULL; |
87f0e418 LP |
1393 | } |
1394 | ||
1395 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1396 | assert(u); | |
1397 | assert(pid >= 1); | |
1398 | ||
05e343b7 LP |
1399 | /* Watch a specific PID. We only support one unit watching |
1400 | * each PID for now. */ | |
1401 | ||
ac155bb8 | 1402 | return hashmap_put(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1403 | } |
1404 | ||
1405 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1406 | assert(u); | |
1407 | assert(pid >= 1); | |
1408 | ||
ac155bb8 | 1409 | hashmap_remove_value(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1410 | } |
1411 | ||
acbb0225 | 1412 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1413 | struct itimerspec its; |
acbb0225 | 1414 | int flags, fd; |
87f0e418 LP |
1415 | bool ours; |
1416 | ||
1417 | assert(u); | |
acbb0225 | 1418 | assert(w); |
faf919f1 | 1419 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1420 | |
1421 | /* This will try to reuse the old timer if there is one */ | |
1422 | ||
faf919f1 LP |
1423 | if (w->type == WATCH_UNIT_TIMER) { |
1424 | assert(w->data.unit == u); | |
1425 | assert(w->fd >= 0); | |
1426 | ||
87f0e418 | 1427 | ours = false; |
acbb0225 | 1428 | fd = w->fd; |
faf919f1 LP |
1429 | } else if (w->type == WATCH_INVALID) { |
1430 | ||
87f0e418 | 1431 | ours = true; |
87f0e418 LP |
1432 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1433 | return -errno; | |
faf919f1 LP |
1434 | } else |
1435 | assert_not_reached("Invalid watch type"); | |
87f0e418 LP |
1436 | |
1437 | zero(its); | |
1438 | ||
1439 | if (delay <= 0) { | |
1440 | /* Set absolute time in the past, but not 0, since we | |
1441 | * don't want to disarm the timer */ | |
1442 | its.it_value.tv_sec = 0; | |
1443 | its.it_value.tv_nsec = 1; | |
1444 | ||
1445 | flags = TFD_TIMER_ABSTIME; | |
1446 | } else { | |
1447 | timespec_store(&its.it_value, delay); | |
1448 | flags = 0; | |
1449 | } | |
1450 | ||
1451 | /* This will also flush the elapse counter */ | |
1452 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1453 | goto fail; | |
1454 | ||
acbb0225 LP |
1455 | if (w->type == WATCH_INVALID) { |
1456 | struct epoll_event ev; | |
87f0e418 | 1457 | |
acbb0225 LP |
1458 | zero(ev); |
1459 | ev.data.ptr = w; | |
f94ea366 | 1460 | ev.events = EPOLLIN; |
acbb0225 | 1461 | |
ac155bb8 | 1462 | if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) |
acbb0225 LP |
1463 | goto fail; |
1464 | } | |
1465 | ||
faf919f1 | 1466 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1467 | w->fd = fd; |
ea430986 | 1468 | w->data.unit = u; |
87f0e418 | 1469 | |
87f0e418 LP |
1470 | return 0; |
1471 | ||
1472 | fail: | |
1473 | if (ours) | |
ea430986 | 1474 | close_nointr_nofail(fd); |
87f0e418 LP |
1475 | |
1476 | return -errno; | |
1477 | } | |
1478 | ||
acbb0225 | 1479 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1480 | assert(u); |
acbb0225 | 1481 | assert(w); |
87f0e418 | 1482 | |
acbb0225 | 1483 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1484 | return; |
1485 | ||
faf919f1 LP |
1486 | assert(w->type == WATCH_UNIT_TIMER); |
1487 | assert(w->data.unit == u); | |
1488 | assert(w->fd >= 0); | |
acbb0225 | 1489 | |
ac155bb8 | 1490 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
a16e1123 | 1491 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1492 | |
1493 | w->fd = -1; | |
1494 | w->type = WATCH_INVALID; | |
ea430986 | 1495 | w->data.unit = NULL; |
87f0e418 LP |
1496 | } |
1497 | ||
1498 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1499 | assert(u); | |
1500 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1501 | ||
1502 | switch (j) { | |
1503 | ||
1504 | case JOB_VERIFY_ACTIVE: | |
1505 | case JOB_START: | |
57339f47 | 1506 | case JOB_STOP: |
87f0e418 LP |
1507 | return true; |
1508 | ||
87f0e418 LP |
1509 | case JOB_RESTART: |
1510 | case JOB_TRY_RESTART: | |
1511 | return unit_can_start(u); | |
1512 | ||
1513 | case JOB_RELOAD: | |
1514 | return unit_can_reload(u); | |
1515 | ||
1516 | case JOB_RELOAD_OR_START: | |
1517 | return unit_can_reload(u) && unit_can_start(u); | |
1518 | ||
1519 | default: | |
1520 | assert_not_reached("Invalid job type"); | |
1521 | } | |
1522 | } | |
1523 | ||
701cc384 | 1524 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1525 | |
1526 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1527 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1528 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1529 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1530 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1531 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
b81884e7 | 1532 | [UNIT_BIND_TO] = UNIT_BOUND_BY, |
87f0e418 | 1533 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1534 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1535 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
b81884e7 | 1536 | [UNIT_BOUND_BY] = UNIT_BIND_TO, |
69dd2852 LP |
1537 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1538 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1539 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1540 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1541 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 1542 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
1543 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
1544 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 LP |
1545 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
1546 | [UNIT_PROPAGATE_RELOAD_TO] = UNIT_PROPAGATE_RELOAD_FROM, | |
1547 | [UNIT_PROPAGATE_RELOAD_FROM] = UNIT_PROPAGATE_RELOAD_TO | |
87f0e418 | 1548 | }; |
701cc384 | 1549 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1550 | |
1551 | assert(u); | |
1552 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1553 | assert(other); |
1554 | ||
9f151f29 LP |
1555 | u = unit_follow_merge(u); |
1556 | other = unit_follow_merge(other); | |
1557 | ||
87f0e418 LP |
1558 | /* We won't allow dependencies on ourselves. We will not |
1559 | * consider them an error however. */ | |
1560 | if (u == other) | |
1561 | return 0; | |
1562 | ||
ac155bb8 | 1563 | if ((r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1564 | return r; |
1565 | ||
5de9682c | 1566 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1567 | if ((r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) |
5de9682c LP |
1568 | return r; |
1569 | ||
701cc384 | 1570 | if (add_reference) |
ac155bb8 MS |
1571 | if ((r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || |
1572 | (r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
701cc384 | 1573 | return r; |
87f0e418 | 1574 | |
ac155bb8 | 1575 | if ((q = set_put(u->dependencies[d], other)) < 0) |
701cc384 | 1576 | return q; |
87f0e418 | 1577 | |
5de9682c | 1578 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1579 | if ((v = set_put(other->dependencies[inverse_table[d]], u)) < 0) { |
5de9682c LP |
1580 | r = v; |
1581 | goto fail; | |
1582 | } | |
701cc384 LP |
1583 | |
1584 | if (add_reference) { | |
ac155bb8 | 1585 | if ((w = set_put(u->dependencies[UNIT_REFERENCES], other)) < 0) { |
701cc384 LP |
1586 | r = w; |
1587 | goto fail; | |
1588 | } | |
1589 | ||
ac155bb8 | 1590 | if ((r = set_put(other->dependencies[UNIT_REFERENCED_BY], u)) < 0) |
701cc384 | 1591 | goto fail; |
87f0e418 LP |
1592 | } |
1593 | ||
c1e1601e | 1594 | unit_add_to_dbus_queue(u); |
87f0e418 | 1595 | return 0; |
701cc384 LP |
1596 | |
1597 | fail: | |
1598 | if (q > 0) | |
ac155bb8 | 1599 | set_remove(u->dependencies[d], other); |
701cc384 LP |
1600 | |
1601 | if (v > 0) | |
ac155bb8 | 1602 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
1603 | |
1604 | if (w > 0) | |
ac155bb8 | 1605 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
1606 | |
1607 | return r; | |
87f0e418 | 1608 | } |
0301abf4 | 1609 | |
2c966c03 LP |
1610 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1611 | int r; | |
1612 | ||
1613 | assert(u); | |
1614 | ||
1615 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1616 | return r; | |
1617 | ||
1618 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1619 | return r; | |
1620 | ||
1621 | return 0; | |
1622 | } | |
1623 | ||
9e2f7c11 LP |
1624 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1625 | char *s; | |
1626 | ||
1627 | assert(u); | |
1628 | assert(name || path); | |
1629 | ||
1630 | if (!name) | |
1631 | name = file_name_from_path(path); | |
1632 | ||
1633 | if (!unit_name_is_template(name)) { | |
1634 | *p = NULL; | |
1635 | return name; | |
1636 | } | |
1637 | ||
ac155bb8 MS |
1638 | if (u->instance) |
1639 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 LP |
1640 | else { |
1641 | char *i; | |
1642 | ||
ac155bb8 | 1643 | if (!(i = unit_name_to_prefix(u->id))) |
9e2f7c11 LP |
1644 | return NULL; |
1645 | ||
1646 | s = unit_name_replace_instance(name, i); | |
1647 | free(i); | |
1648 | } | |
1649 | ||
1650 | if (!s) | |
1651 | return NULL; | |
1652 | ||
1653 | *p = s; | |
1654 | return s; | |
1655 | } | |
1656 | ||
701cc384 | 1657 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1658 | Unit *other; |
1659 | int r; | |
9e2f7c11 | 1660 | char *s; |
09b6b09f | 1661 | |
9e2f7c11 LP |
1662 | assert(u); |
1663 | assert(name || path); | |
09b6b09f | 1664 | |
9e2f7c11 LP |
1665 | if (!(name = resolve_template(u, name, path, &s))) |
1666 | return -ENOMEM; | |
09b6b09f | 1667 | |
ac155bb8 | 1668 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1669 | goto finish; |
1670 | ||
701cc384 | 1671 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1672 | |
1673 | finish: | |
1674 | free(s); | |
1675 | return r; | |
09b6b09f LP |
1676 | } |
1677 | ||
2c966c03 LP |
1678 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1679 | Unit *other; | |
1680 | int r; | |
1681 | char *s; | |
1682 | ||
1683 | assert(u); | |
1684 | assert(name || path); | |
1685 | ||
1686 | if (!(name = resolve_template(u, name, path, &s))) | |
1687 | return -ENOMEM; | |
1688 | ||
ac155bb8 | 1689 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1690 | goto finish; |
1691 | ||
1692 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1693 | ||
1694 | finish: | |
1695 | free(s); | |
1696 | return r; | |
1697 | } | |
1698 | ||
701cc384 | 1699 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1700 | Unit *other; |
1701 | int r; | |
9e2f7c11 | 1702 | char *s; |
bd77d0fc | 1703 | |
9e2f7c11 LP |
1704 | assert(u); |
1705 | assert(name || path); | |
bd77d0fc | 1706 | |
9e2f7c11 LP |
1707 | if (!(name = resolve_template(u, name, path, &s))) |
1708 | return -ENOMEM; | |
bd77d0fc | 1709 | |
ac155bb8 | 1710 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1711 | goto finish; |
1712 | ||
701cc384 | 1713 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1714 | |
1715 | finish: | |
1716 | free(s); | |
1717 | return r; | |
bd77d0fc LP |
1718 | } |
1719 | ||
2c966c03 LP |
1720 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1721 | Unit *other; | |
1722 | int r; | |
1723 | char *s; | |
1724 | ||
1725 | assert(u); | |
1726 | assert(name || path); | |
1727 | ||
1728 | if (!(name = resolve_template(u, name, path, &s))) | |
1729 | return -ENOMEM; | |
1730 | ||
ac155bb8 | 1731 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1732 | goto finish; |
1733 | ||
1734 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1735 | goto finish; | |
1736 | ||
1737 | finish: | |
1738 | free(s); | |
1739 | return r; | |
1740 | } | |
1741 | ||
0301abf4 LP |
1742 | int set_unit_path(const char *p) { |
1743 | char *cwd, *c; | |
1744 | int r; | |
1745 | ||
1746 | /* This is mostly for debug purposes */ | |
1747 | ||
1748 | if (path_is_absolute(p)) { | |
1749 | if (!(c = strdup(p))) | |
1750 | return -ENOMEM; | |
1751 | } else { | |
1752 | if (!(cwd = get_current_dir_name())) | |
1753 | return -errno; | |
1754 | ||
1755 | r = asprintf(&c, "%s/%s", cwd, p); | |
1756 | free(cwd); | |
1757 | ||
1758 | if (r < 0) | |
1759 | return -ENOMEM; | |
1760 | } | |
1761 | ||
036643a2 | 1762 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1763 | r = -errno; |
1764 | free(c); | |
1765 | return r; | |
1766 | } | |
1767 | ||
1768 | return 0; | |
1769 | } | |
88066b3a | 1770 | |
ea430986 LP |
1771 | char *unit_dbus_path(Unit *u) { |
1772 | char *p, *e; | |
1773 | ||
1774 | assert(u); | |
1775 | ||
ac155bb8 | 1776 | if (!u->id) |
04ade7d2 LP |
1777 | return NULL; |
1778 | ||
ac155bb8 | 1779 | if (!(e = bus_path_escape(u->id))) |
ea430986 LP |
1780 | return NULL; |
1781 | ||
35d2e7ec | 1782 | p = strappend("/org/freedesktop/systemd1/unit/", e); |
ea430986 | 1783 | free(e); |
35d2e7ec | 1784 | |
ea430986 LP |
1785 | return p; |
1786 | } | |
1787 | ||
8e274523 | 1788 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
8e274523 LP |
1789 | int r; |
1790 | ||
1791 | assert(u); | |
1792 | assert(b); | |
35d2e7ec | 1793 | |
8e274523 LP |
1794 | assert(b->path); |
1795 | ||
e025b4c3 | 1796 | if (!b->controller) { |
35d2e7ec LP |
1797 | if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) |
1798 | return -ENOMEM; | |
1799 | ||
e025b4c3 LP |
1800 | b->ours = true; |
1801 | } | |
1802 | ||
8e274523 LP |
1803 | /* Ensure this hasn't been added yet */ |
1804 | assert(!b->unit); | |
1805 | ||
d686d8a9 LP |
1806 | if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
1807 | CGroupBonding *l; | |
8e274523 | 1808 | |
ac155bb8 | 1809 | l = hashmap_get(u->manager->cgroup_bondings, b->path); |
d686d8a9 LP |
1810 | LIST_PREPEND(CGroupBonding, by_path, l, b); |
1811 | ||
ac155bb8 | 1812 | if ((r = hashmap_replace(u->manager->cgroup_bondings, b->path, l)) < 0) { |
d686d8a9 LP |
1813 | LIST_REMOVE(CGroupBonding, by_path, l, b); |
1814 | return r; | |
1815 | } | |
8e274523 LP |
1816 | } |
1817 | ||
ac155bb8 | 1818 | LIST_PREPEND(CGroupBonding, by_unit, u->cgroup_bondings, b); |
8e274523 LP |
1819 | b->unit = u; |
1820 | ||
1821 | return 0; | |
1822 | } | |
1823 | ||
013b87c0 LP |
1824 | static char *default_cgroup_path(Unit *u) { |
1825 | char *p; | |
1826 | ||
1827 | assert(u); | |
1828 | ||
ac155bb8 | 1829 | if (u->instance) { |
4f2d528d | 1830 | char *t; |
013b87c0 | 1831 | |
ac155bb8 | 1832 | t = unit_name_template(u->id); |
cd0ed1db | 1833 | if (!t) |
4f2d528d LP |
1834 | return NULL; |
1835 | ||
ac155bb8 | 1836 | p = join(u->manager->cgroup_hierarchy, "/", t, "/", u->instance, NULL); |
4f2d528d LP |
1837 | free(t); |
1838 | } else | |
ac155bb8 | 1839 | p = join(u->manager->cgroup_hierarchy, "/", u->id, NULL); |
4f2d528d | 1840 | |
cd0ed1db | 1841 | return p; |
013b87c0 LP |
1842 | } |
1843 | ||
8e274523 | 1844 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
013b87c0 LP |
1845 | char *controller = NULL, *path = NULL; |
1846 | CGroupBonding *b = NULL; | |
e025b4c3 | 1847 | bool ours = false; |
8e274523 LP |
1848 | int r; |
1849 | ||
1850 | assert(u); | |
1851 | assert(name); | |
1852 | ||
35d2e7ec LP |
1853 | if ((r = cg_split_spec(name, &controller, &path)) < 0) |
1854 | return r; | |
8e274523 | 1855 | |
e025b4c3 | 1856 | if (!path) { |
35d2e7ec | 1857 | path = default_cgroup_path(u); |
e025b4c3 LP |
1858 | ours = true; |
1859 | } | |
013b87c0 | 1860 | |
e025b4c3 | 1861 | if (!controller) { |
55096547 | 1862 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
e025b4c3 LP |
1863 | ours = true; |
1864 | } | |
013b87c0 | 1865 | |
35d2e7ec LP |
1866 | if (!path || !controller) { |
1867 | free(path); | |
1868 | free(controller); | |
1869 | ||
1870 | return -ENOMEM; | |
8e274523 LP |
1871 | } |
1872 | ||
ac155bb8 | 1873 | if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) { |
013b87c0 LP |
1874 | r = -EEXIST; |
1875 | goto fail; | |
1876 | } | |
8e274523 | 1877 | |
013b87c0 | 1878 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1879 | r = -ENOMEM; |
1880 | goto fail; | |
1881 | } | |
1882 | ||
013b87c0 LP |
1883 | b->controller = controller; |
1884 | b->path = path; | |
e025b4c3 LP |
1885 | b->ours = ours; |
1886 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
8e274523 LP |
1887 | |
1888 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1889 | goto fail; | |
1890 | ||
1891 | return 0; | |
1892 | ||
1893 | fail: | |
013b87c0 LP |
1894 | free(path); |
1895 | free(controller); | |
8e274523 LP |
1896 | free(b); |
1897 | ||
1898 | return r; | |
1899 | } | |
1900 | ||
06d4c99a | 1901 | static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
d686d8a9 | 1902 | CGroupBonding *b = NULL; |
8e274523 LP |
1903 | int r = -ENOMEM; |
1904 | ||
1905 | assert(u); | |
1906 | ||
06d4c99a LP |
1907 | if (!controller) |
1908 | controller = SYSTEMD_CGROUP_CONTROLLER; | |
8e274523 | 1909 | |
ac155bb8 | 1910 | if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) |
06d4c99a | 1911 | return 0; |
8e274523 | 1912 | |
06d4c99a LP |
1913 | if (!(b = new0(CGroupBonding, 1))) |
1914 | return -ENOMEM; | |
8e274523 | 1915 | |
06d4c99a LP |
1916 | if (!(b->controller = strdup(controller))) |
1917 | goto fail; | |
d686d8a9 | 1918 | |
06d4c99a LP |
1919 | if (!(b->path = default_cgroup_path(u))) |
1920 | goto fail; | |
d686d8a9 | 1921 | |
06d4c99a LP |
1922 | b->ours = true; |
1923 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
d686d8a9 | 1924 | |
06d4c99a LP |
1925 | if ((r = unit_add_cgroup(u, b)) < 0) |
1926 | goto fail; | |
8e274523 LP |
1927 | |
1928 | return 0; | |
1929 | ||
1930 | fail: | |
06d4c99a LP |
1931 | free(b->path); |
1932 | free(b->controller); | |
1933 | free(b); | |
8e274523 LP |
1934 | |
1935 | return r; | |
1936 | } | |
1937 | ||
06d4c99a | 1938 | int unit_add_default_cgroups(Unit *u) { |
ab1f0633 | 1939 | CGroupAttribute *a; |
06d4c99a LP |
1940 | char **c; |
1941 | int r; | |
ab1f0633 | 1942 | |
06d4c99a LP |
1943 | assert(u); |
1944 | ||
1945 | /* Adds in the default cgroups, if they weren't specified | |
1946 | * otherwise. */ | |
1947 | ||
ac155bb8 | 1948 | if (!u->manager->cgroup_hierarchy) |
df18d8c8 LP |
1949 | return 0; |
1950 | ||
06d4c99a LP |
1951 | if ((r = unit_add_one_default_cgroup(u, NULL)) < 0) |
1952 | return r; | |
1953 | ||
ac155bb8 | 1954 | STRV_FOREACH(c, u->manager->default_controllers) |
ab1f0633 LP |
1955 | unit_add_one_default_cgroup(u, *c); |
1956 | ||
ac155bb8 | 1957 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) |
ab1f0633 | 1958 | unit_add_one_default_cgroup(u, a->controller); |
06d4c99a LP |
1959 | |
1960 | return 0; | |
1961 | } | |
1962 | ||
8e274523 LP |
1963 | CGroupBonding* unit_get_default_cgroup(Unit *u) { |
1964 | assert(u); | |
1965 | ||
ac155bb8 | 1966 | return cgroup_bonding_find_list(u->cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); |
8e274523 LP |
1967 | } |
1968 | ||
ab1f0633 LP |
1969 | int unit_add_cgroup_attribute(Unit *u, const char *controller, const char *name, const char *value, CGroupAttributeMapCallback map_callback) { |
1970 | int r; | |
1971 | char *c = NULL; | |
1972 | CGroupAttribute *a; | |
1973 | ||
1974 | assert(u); | |
1975 | assert(name); | |
1976 | assert(value); | |
1977 | ||
1978 | if (!controller) { | |
1979 | const char *dot; | |
1980 | ||
1981 | dot = strchr(name, '.'); | |
1982 | if (!dot) | |
1983 | return -EINVAL; | |
1984 | ||
1985 | c = strndup(name, dot - name); | |
1986 | if (!c) | |
1987 | return -ENOMEM; | |
1988 | ||
1989 | controller = c; | |
1990 | } | |
1991 | ||
1992 | if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)) { | |
1993 | r = -EINVAL; | |
1994 | goto finish; | |
1995 | } | |
1996 | ||
1997 | a = new0(CGroupAttribute, 1); | |
1998 | if (!a) { | |
1999 | r = -ENOMEM; | |
2000 | goto finish; | |
2001 | } | |
2002 | ||
2003 | if (c) { | |
2004 | a->controller = c; | |
2005 | c = NULL; | |
2006 | } else | |
2007 | a->controller = strdup(controller); | |
2008 | ||
2009 | a->name = strdup(name); | |
2010 | a->value = strdup(value); | |
2011 | ||
2012 | if (!a->controller || !a->name || !a->value) { | |
2013 | free(a->controller); | |
2014 | free(a->name); | |
2015 | free(a->value); | |
2016 | free(a); | |
2017 | ||
2018 | return -ENOMEM; | |
2019 | } | |
2020 | ||
2021 | a->map_callback = map_callback; | |
2022 | ||
ac155bb8 | 2023 | LIST_PREPEND(CGroupAttribute, by_unit, u->cgroup_attributes, a); |
ab1f0633 LP |
2024 | |
2025 | r = 0; | |
2026 | ||
2027 | finish: | |
2028 | free(c); | |
2029 | return r; | |
2030 | } | |
2031 | ||
f6ff8c29 LP |
2032 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
2033 | char *t; | |
2034 | int r; | |
2035 | ||
2036 | assert(u); | |
2037 | assert(type); | |
2038 | assert(_found); | |
2039 | ||
ac155bb8 | 2040 | if (!(t = unit_name_change_suffix(u->id, type))) |
f6ff8c29 LP |
2041 | return -ENOMEM; |
2042 | ||
2043 | assert(!unit_has_name(u, t)); | |
2044 | ||
ac155bb8 | 2045 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
2046 | free(t); |
2047 | ||
9e2f7c11 | 2048 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2049 | |
2050 | return r; | |
2051 | } | |
2052 | ||
a16e1123 LP |
2053 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
2054 | Unit *found; | |
2055 | char *t; | |
2056 | ||
2057 | assert(u); | |
2058 | assert(type); | |
2059 | assert(_found); | |
2060 | ||
ac155bb8 | 2061 | if (!(t = unit_name_change_suffix(u->id, type))) |
a16e1123 LP |
2062 | return -ENOMEM; |
2063 | ||
2064 | assert(!unit_has_name(u, t)); | |
2065 | ||
ac155bb8 | 2066 | found = manager_get_unit(u->manager, t); |
a16e1123 LP |
2067 | free(t); |
2068 | ||
2069 | if (!found) | |
2070 | return -ENOENT; | |
2071 | ||
2072 | *_found = found; | |
2073 | return 0; | |
2074 | } | |
2075 | ||
9e2f7c11 LP |
2076 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
2077 | Unit *u = userdata; | |
2078 | assert(u); | |
2079 | ||
ac155bb8 | 2080 | return unit_name_to_prefix_and_instance(u->id); |
9e2f7c11 LP |
2081 | } |
2082 | ||
2083 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
2084 | Unit *u = userdata; | |
2085 | assert(u); | |
2086 | ||
ac155bb8 | 2087 | return unit_name_to_prefix(u->id); |
9e2f7c11 LP |
2088 | } |
2089 | ||
2090 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
2091 | Unit *u = userdata; | |
2092 | char *p, *r; | |
2093 | ||
2094 | assert(u); | |
2095 | ||
ac155bb8 | 2096 | if (!(p = unit_name_to_prefix(u->id))) |
9e2f7c11 LP |
2097 | return NULL; |
2098 | ||
2099 | r = unit_name_unescape(p); | |
2100 | free(p); | |
2101 | ||
2102 | return r; | |
2103 | } | |
2104 | ||
2105 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
2106 | Unit *u = userdata; | |
2107 | assert(u); | |
2108 | ||
ac155bb8 MS |
2109 | if (u->instance) |
2110 | return unit_name_unescape(u->instance); | |
9e2f7c11 LP |
2111 | |
2112 | return strdup(""); | |
2113 | } | |
2114 | ||
9fc50704 LP |
2115 | static char *specifier_filename(char specifier, void *data, void *userdata) { |
2116 | Unit *u = userdata; | |
2117 | assert(u); | |
2118 | ||
ac155bb8 MS |
2119 | if (u->instance) |
2120 | return unit_name_path_unescape(u->instance); | |
9fc50704 | 2121 | |
ac155bb8 | 2122 | return unit_name_to_path(u->instance); |
9fc50704 LP |
2123 | } |
2124 | ||
0aef4345 LP |
2125 | static char *specifier_cgroup(char specifier, void *data, void *userdata) { |
2126 | Unit *u = userdata; | |
2127 | assert(u); | |
2128 | ||
2129 | return default_cgroup_path(u); | |
2130 | } | |
2131 | ||
2132 | static char *specifier_cgroup_root(char specifier, void *data, void *userdata) { | |
2133 | Unit *u = userdata; | |
2134 | char *p; | |
2135 | assert(u); | |
2136 | ||
2137 | if (specifier == 'r') | |
ac155bb8 | 2138 | return strdup(u->manager->cgroup_hierarchy); |
0aef4345 | 2139 | |
ac155bb8 | 2140 | if (parent_of_path(u->manager->cgroup_hierarchy, &p) < 0) |
0aef4345 LP |
2141 | return strdup(""); |
2142 | ||
2143 | if (streq(p, "/")) { | |
2144 | free(p); | |
2145 | return strdup(""); | |
2146 | } | |
2147 | ||
2148 | return p; | |
2149 | } | |
2150 | ||
2151 | static char *specifier_runtime(char specifier, void *data, void *userdata) { | |
2152 | Unit *u = userdata; | |
2153 | assert(u); | |
2154 | ||
ac155bb8 | 2155 | if (u->manager->running_as == MANAGER_USER) { |
0aef4345 LP |
2156 | const char *e; |
2157 | ||
2158 | e = getenv("XDG_RUNTIME_DIR"); | |
2159 | if (e) | |
2160 | return strdup(e); | |
2161 | } | |
2162 | ||
2163 | return strdup("/run"); | |
2164 | } | |
2165 | ||
9e2f7c11 LP |
2166 | char *unit_name_printf(Unit *u, const char* format) { |
2167 | ||
2168 | /* | |
2169 | * This will use the passed string as format string and | |
2170 | * replace the following specifiers: | |
2171 | * | |
2172 | * %n: the full id of the unit (foo@bar.waldo) | |
2173 | * %N: the id of the unit without the suffix (foo@bar) | |
2174 | * %p: the prefix (foo) | |
2175 | * %i: the instance (bar) | |
2176 | */ | |
2177 | ||
2178 | const Specifier table[] = { | |
ac155bb8 | 2179 | { 'n', specifier_string, u->id }, |
9e2f7c11 LP |
2180 | { 'N', specifier_prefix_and_instance, NULL }, |
2181 | { 'p', specifier_prefix, NULL }, | |
ac155bb8 | 2182 | { 'i', specifier_string, u->instance }, |
9e2f7c11 LP |
2183 | { 0, NULL, NULL } |
2184 | }; | |
2185 | ||
2186 | assert(u); | |
2187 | assert(format); | |
2188 | ||
2189 | return specifier_printf(format, table, u); | |
2190 | } | |
2191 | ||
2192 | char *unit_full_printf(Unit *u, const char *format) { | |
2193 | ||
2194 | /* This is similar to unit_name_printf() but also supports | |
0aef4345 LP |
2195 | * unescaping. Also, adds a couple of additional codes: |
2196 | * | |
2197 | * %c cgroup path of unit | |
2198 | * %r root cgroup path of this systemd instance (e.g. "/user/lennart/shared/systemd-4711") | |
2199 | * %R parent of root cgroup path (e.g. "/usr/lennart/shared") | |
2200 | * %t the runtime directory to place sockets in (e.g. "/run" or $XDG_RUNTIME_DIR) | |
2201 | */ | |
9e2f7c11 LP |
2202 | |
2203 | const Specifier table[] = { | |
ac155bb8 | 2204 | { 'n', specifier_string, u->id }, |
9e2f7c11 LP |
2205 | { 'N', specifier_prefix_and_instance, NULL }, |
2206 | { 'p', specifier_prefix, NULL }, | |
2207 | { 'P', specifier_prefix_unescaped, NULL }, | |
ac155bb8 | 2208 | { 'i', specifier_string, u->instance }, |
9e2f7c11 | 2209 | { 'I', specifier_instance_unescaped, NULL }, |
9fc50704 | 2210 | { 'f', specifier_filename, NULL }, |
0aef4345 LP |
2211 | { 'c', specifier_cgroup, NULL }, |
2212 | { 'r', specifier_cgroup_root, NULL }, | |
2213 | { 'R', specifier_cgroup_root, NULL }, | |
2214 | { 't', specifier_runtime, NULL }, | |
9e2f7c11 LP |
2215 | { 0, NULL, NULL } |
2216 | }; | |
2217 | ||
2218 | assert(u); | |
2219 | assert(format); | |
2220 | ||
2221 | return specifier_printf(format, table, u); | |
2222 | } | |
2223 | ||
2224 | char **unit_full_printf_strv(Unit *u, char **l) { | |
2225 | size_t n; | |
2226 | char **r, **i, **j; | |
2227 | ||
2228 | /* Applies unit_full_printf to every entry in l */ | |
2229 | ||
2230 | assert(u); | |
2231 | ||
2232 | n = strv_length(l); | |
2233 | if (!(r = new(char*, n+1))) | |
2234 | return NULL; | |
2235 | ||
2236 | for (i = l, j = r; *i; i++, j++) | |
2237 | if (!(*j = unit_full_printf(u, *i))) | |
2238 | goto fail; | |
2239 | ||
2240 | *j = NULL; | |
2241 | return r; | |
2242 | ||
2243 | fail: | |
da19d5c1 | 2244 | for (j--; j >= r; j--) |
9e2f7c11 LP |
2245 | free(*j); |
2246 | ||
2247 | free(r); | |
2248 | ||
2249 | return NULL; | |
2250 | } | |
2251 | ||
05e343b7 LP |
2252 | int unit_watch_bus_name(Unit *u, const char *name) { |
2253 | assert(u); | |
2254 | assert(name); | |
2255 | ||
2256 | /* Watch a specific name on the bus. We only support one unit | |
2257 | * watching each name for now. */ | |
2258 | ||
ac155bb8 | 2259 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2260 | } |
2261 | ||
2262 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2263 | assert(u); | |
2264 | assert(name); | |
2265 | ||
ac155bb8 | 2266 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2267 | } |
2268 | ||
a16e1123 LP |
2269 | bool unit_can_serialize(Unit *u) { |
2270 | assert(u); | |
2271 | ||
2272 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2273 | } | |
2274 | ||
2275 | int unit_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2276 | int r; | |
2277 | ||
2278 | assert(u); | |
2279 | assert(f); | |
2280 | assert(fds); | |
2281 | ||
2282 | if (!unit_can_serialize(u)) | |
2283 | return 0; | |
2284 | ||
2285 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
2286 | return r; | |
2287 | ||
ac155bb8 MS |
2288 | if (u->job) |
2289 | unit_serialize_item(u, f, "job", job_type_to_string(u->job->type)); | |
cca098b0 | 2290 | |
ac155bb8 MS |
2291 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2292 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2293 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2294 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2295 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
2791a8f8 | 2296 | |
ac155bb8 MS |
2297 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2298 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2299 | |
a16e1123 LP |
2300 | /* End marker */ |
2301 | fputc('\n', f); | |
2302 | return 0; | |
2303 | } | |
2304 | ||
2305 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2306 | va_list ap; | |
2307 | ||
2308 | assert(u); | |
2309 | assert(f); | |
2310 | assert(key); | |
2311 | assert(format); | |
2312 | ||
2313 | fputs(key, f); | |
2314 | fputc('=', f); | |
2315 | ||
2316 | va_start(ap, format); | |
2317 | vfprintf(f, format, ap); | |
2318 | va_end(ap); | |
2319 | ||
2320 | fputc('\n', f); | |
2321 | } | |
2322 | ||
2323 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2324 | assert(u); | |
2325 | assert(f); | |
2326 | assert(key); | |
2327 | assert(value); | |
2328 | ||
2329 | fprintf(f, "%s=%s\n", key, value); | |
2330 | } | |
2331 | ||
2332 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2333 | int r; | |
2334 | ||
2335 | assert(u); | |
2336 | assert(f); | |
2337 | assert(fds); | |
2338 | ||
2339 | if (!unit_can_serialize(u)) | |
2340 | return 0; | |
2341 | ||
2342 | for (;;) { | |
20c03b7b | 2343 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2344 | size_t k; |
2345 | ||
2346 | if (!fgets(line, sizeof(line), f)) { | |
2347 | if (feof(f)) | |
2348 | return 0; | |
2349 | return -errno; | |
2350 | } | |
2351 | ||
10f8e83c | 2352 | char_array_0(line); |
a16e1123 LP |
2353 | l = strstrip(line); |
2354 | ||
2355 | /* End marker */ | |
2356 | if (l[0] == 0) | |
2357 | return 0; | |
2358 | ||
2359 | k = strcspn(l, "="); | |
2360 | ||
2361 | if (l[k] == '=') { | |
2362 | l[k] = 0; | |
2363 | v = l+k+1; | |
2364 | } else | |
2365 | v = l+k; | |
2366 | ||
cca098b0 LP |
2367 | if (streq(l, "job")) { |
2368 | JobType type; | |
2369 | ||
2370 | if ((type = job_type_from_string(v)) < 0) | |
2371 | log_debug("Failed to parse job type value %s", v); | |
2372 | else | |
ac155bb8 | 2373 | u->deserialized_job = type; |
cca098b0 LP |
2374 | |
2375 | continue; | |
8aaf019b | 2376 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2377 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2378 | continue; |
2379 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2380 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2381 | continue; |
2382 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2383 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2384 | continue; |
2385 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2386 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2387 | continue; |
2791a8f8 | 2388 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2389 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 LP |
2390 | continue; |
2391 | } else if (streq(l, "condition-result")) { | |
2392 | int b; | |
2393 | ||
2394 | if ((b = parse_boolean(v)) < 0) | |
2395 | log_debug("Failed to parse condition result value %s", v); | |
2396 | else | |
ac155bb8 | 2397 | u->condition_result = b; |
efbac6d2 LP |
2398 | |
2399 | continue; | |
8aaf019b | 2400 | } |
cca098b0 | 2401 | |
a16e1123 LP |
2402 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
2403 | return r; | |
2404 | } | |
2405 | } | |
2406 | ||
6e2ef85b LP |
2407 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2408 | Unit *device; | |
2409 | char *e; | |
2410 | int r; | |
2411 | ||
2412 | assert(u); | |
2413 | ||
2414 | if (!what) | |
2415 | return 0; | |
2416 | ||
2417 | /* Adds in links to the device node that this unit is based on */ | |
2418 | ||
8407a5d0 | 2419 | if (!is_device_path(what)) |
6e2ef85b LP |
2420 | return 0; |
2421 | ||
2422 | if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) | |
2423 | return -ENOMEM; | |
2424 | ||
ac155bb8 | 2425 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2426 | free(e); |
2427 | ||
2428 | if (r < 0) | |
2429 | return r; | |
2430 | ||
b81884e7 | 2431 | if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BIND_TO, device, true)) < 0) |
6e2ef85b LP |
2432 | return r; |
2433 | ||
2434 | if (wants) | |
2435 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
2436 | return r; | |
2437 | ||
2438 | return 0; | |
2439 | } | |
a16e1123 | 2440 | |
cca098b0 LP |
2441 | int unit_coldplug(Unit *u) { |
2442 | int r; | |
2443 | ||
2444 | assert(u); | |
2445 | ||
2446 | if (UNIT_VTABLE(u)->coldplug) | |
2447 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2448 | return r; | |
2449 | ||
ac155bb8 MS |
2450 | if (u->deserialized_job >= 0) { |
2451 | if ((r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL)) < 0) | |
cca098b0 LP |
2452 | return r; |
2453 | ||
ac155bb8 | 2454 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2455 | } |
2456 | ||
2457 | return 0; | |
2458 | } | |
2459 | ||
5831e9b7 | 2460 | void unit_status_printf(Unit *u, const char *status, const char *format, ...) { |
9e58ff9c LP |
2461 | va_list ap; |
2462 | ||
2463 | assert(u); | |
2464 | assert(format); | |
2465 | ||
2466 | if (!UNIT_VTABLE(u)->show_status) | |
2467 | return; | |
2468 | ||
ac155bb8 | 2469 | if (!manager_get_show_status(u->manager)) |
9e58ff9c LP |
2470 | return; |
2471 | ||
ac155bb8 | 2472 | if (!manager_is_booting_or_shutting_down(u->manager)) |
9e58ff9c LP |
2473 | return; |
2474 | ||
2475 | va_start(ap, format); | |
67e5cc4f | 2476 | status_vprintf(status, true, format, ap); |
9e58ff9c LP |
2477 | va_end(ap); |
2478 | } | |
2479 | ||
45fb0699 | 2480 | bool unit_need_daemon_reload(Unit *u) { |
45fb0699 LP |
2481 | assert(u); |
2482 | ||
ac155bb8 | 2483 | if (u->fragment_path) { |
5f4b19f4 | 2484 | struct stat st; |
45fb0699 | 2485 | |
5f4b19f4 | 2486 | zero(st); |
ac155bb8 | 2487 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2488 | /* What, cannot access this anymore? */ |
2489 | return true; | |
45fb0699 | 2490 | |
ac155bb8 MS |
2491 | if (u->fragment_mtime > 0 && |
2492 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2493 | return true; |
2494 | } | |
2495 | ||
2496 | if (UNIT_VTABLE(u)->need_daemon_reload) | |
2497 | return UNIT_VTABLE(u)->need_daemon_reload(u); | |
2498 | ||
2499 | return false; | |
45fb0699 LP |
2500 | } |
2501 | ||
fdf20a31 | 2502 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2503 | assert(u); |
2504 | ||
fdf20a31 MM |
2505 | if (UNIT_VTABLE(u)->reset_failed) |
2506 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2507 | } |
2508 | ||
a7f241db LP |
2509 | Unit *unit_following(Unit *u) { |
2510 | assert(u); | |
2511 | ||
2512 | if (UNIT_VTABLE(u)->following) | |
2513 | return UNIT_VTABLE(u)->following(u); | |
2514 | ||
2515 | return NULL; | |
2516 | } | |
2517 | ||
18ffdfda LP |
2518 | bool unit_pending_inactive(Unit *u) { |
2519 | assert(u); | |
2520 | ||
2521 | /* Returns true if the unit is inactive or going down */ | |
2522 | ||
2523 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
2524 | return true; | |
2525 | ||
ac155bb8 | 2526 | if (u->job && u->job->type == JOB_STOP) |
18ffdfda LP |
2527 | return true; |
2528 | ||
2529 | return false; | |
2530 | } | |
2531 | ||
f976f3f6 LP |
2532 | bool unit_pending_active(Unit *u) { |
2533 | assert(u); | |
2534 | ||
f60c2665 | 2535 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2536 | |
2537 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2538 | return true; | |
2539 | ||
ac155bb8 MS |
2540 | if (u->job && |
2541 | (u->job->type == JOB_START || | |
2542 | u->job->type == JOB_RELOAD_OR_START || | |
2543 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2544 | return true; |
2545 | ||
2546 | return false; | |
2547 | } | |
2548 | ||
71fad675 LP |
2549 | UnitType unit_name_to_type(const char *n) { |
2550 | UnitType t; | |
2551 | ||
2552 | assert(n); | |
2553 | ||
2554 | for (t = 0; t < _UNIT_TYPE_MAX; t++) | |
2555 | if (endswith(n, unit_vtable[t]->suffix)) | |
2556 | return t; | |
2557 | ||
2558 | return _UNIT_TYPE_INVALID; | |
2559 | } | |
2560 | ||
b9c0d441 | 2561 | bool unit_name_is_valid(const char *n, bool template_ok) { |
71fad675 LP |
2562 | UnitType t; |
2563 | ||
2564 | t = unit_name_to_type(n); | |
2565 | if (t < 0 || t >= _UNIT_TYPE_MAX) | |
2566 | return false; | |
2567 | ||
b9c0d441 | 2568 | return unit_name_is_valid_no_type(n, template_ok); |
71fad675 LP |
2569 | } |
2570 | ||
8a0867d6 LP |
2571 | int unit_kill(Unit *u, KillWho w, KillMode m, int signo, DBusError *error) { |
2572 | assert(u); | |
2573 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
2574 | assert(m >= 0 && m < _KILL_MODE_MAX); | |
2575 | assert(signo > 0); | |
2576 | assert(signo < _NSIG); | |
2577 | ||
2578 | if (m == KILL_NONE) | |
2579 | return 0; | |
2580 | ||
2581 | if (!UNIT_VTABLE(u)->kill) | |
2582 | return -ENOTSUP; | |
2583 | ||
2584 | return UNIT_VTABLE(u)->kill(u, w, m, signo, error); | |
2585 | } | |
2586 | ||
6210e7fc LP |
2587 | int unit_following_set(Unit *u, Set **s) { |
2588 | assert(u); | |
2589 | assert(s); | |
2590 | ||
2591 | if (UNIT_VTABLE(u)->following_set) | |
2592 | return UNIT_VTABLE(u)->following_set(u, s); | |
2593 | ||
2594 | *s = NULL; | |
2595 | return 0; | |
2596 | } | |
2597 | ||
a4375746 LP |
2598 | UnitFileState unit_get_unit_file_state(Unit *u) { |
2599 | assert(u); | |
2600 | ||
ac155bb8 MS |
2601 | if (u->unit_file_state < 0 && u->fragment_path) |
2602 | u->unit_file_state = unit_file_get_state( | |
2603 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, | |
2604 | NULL, file_name_from_path(u->fragment_path)); | |
a4375746 | 2605 | |
ac155bb8 | 2606 | return u->unit_file_state; |
a4375746 LP |
2607 | } |
2608 | ||
57020a3a LP |
2609 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
2610 | assert(ref); | |
2611 | assert(u); | |
2612 | ||
2613 | if (ref->unit) | |
2614 | unit_ref_unset(ref); | |
2615 | ||
2616 | ref->unit = u; | |
ac155bb8 | 2617 | LIST_PREPEND(UnitRef, refs, u->refs, ref); |
57020a3a LP |
2618 | return u; |
2619 | } | |
2620 | ||
2621 | void unit_ref_unset(UnitRef *ref) { | |
2622 | assert(ref); | |
2623 | ||
2624 | if (!ref->unit) | |
2625 | return; | |
2626 | ||
ac155bb8 | 2627 | LIST_REMOVE(UnitRef, refs, ref->unit->refs, ref); |
57020a3a LP |
2628 | ref->unit = NULL; |
2629 | } | |
2630 | ||
94f04347 LP |
2631 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { |
2632 | [UNIT_STUB] = "stub", | |
2633 | [UNIT_LOADED] = "loaded", | |
fdf20a31 | 2634 | [UNIT_ERROR] = "error", |
00dc5d76 | 2635 | [UNIT_MERGED] = "merged", |
6daf4f90 | 2636 | [UNIT_MASKED] = "masked" |
94f04347 LP |
2637 | }; |
2638 | ||
2639 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
2640 | ||
2641 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
2642 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2643 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2644 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2645 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2646 | [UNIT_ACTIVATING] = "activating", |
2647 | [UNIT_DEACTIVATING] = "deactivating" | |
2648 | }; | |
2649 | ||
2650 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2651 | ||
2652 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2653 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2654 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 LP |
2655 | [UNIT_WANTS] = "Wants", |
2656 | [UNIT_REQUISITE] = "Requisite", | |
9e2f7c11 | 2657 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
94f04347 | 2658 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2659 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
b81884e7 | 2660 | [UNIT_BIND_TO] = "BindTo", |
94f04347 LP |
2661 | [UNIT_WANTED_BY] = "WantedBy", |
2662 | [UNIT_CONFLICTS] = "Conflicts", | |
69dd2852 | 2663 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
b81884e7 | 2664 | [UNIT_BOUND_BY] = "BoundBy", |
94f04347 LP |
2665 | [UNIT_BEFORE] = "Before", |
2666 | [UNIT_AFTER] = "After", | |
701cc384 | 2667 | [UNIT_REFERENCES] = "References", |
5de9682c | 2668 | [UNIT_REFERENCED_BY] = "ReferencedBy", |
57020a3a LP |
2669 | [UNIT_ON_FAILURE] = "OnFailure", |
2670 | [UNIT_TRIGGERS] = "Triggers", | |
4dcc1cb4 LP |
2671 | [UNIT_TRIGGERED_BY] = "TriggeredBy", |
2672 | [UNIT_PROPAGATE_RELOAD_TO] = "PropagateReloadTo", | |
2673 | [UNIT_PROPAGATE_RELOAD_FROM] = "PropagateReloadFrom" | |
94f04347 LP |
2674 | }; |
2675 | ||
2676 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |