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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 | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
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 | 31 | |
877d54e9 LP |
32 | #include "systemd/sd-id128.h" |
33 | #include "systemd/sd-messages.h" | |
87f0e418 LP |
34 | #include "set.h" |
35 | #include "unit.h" | |
36 | #include "macro.h" | |
37 | #include "strv.h" | |
9eb977db | 38 | #include "path-util.h" |
87f0e418 LP |
39 | #include "load-fragment.h" |
40 | #include "load-dropin.h" | |
41 | #include "log.h" | |
9e2f7c11 | 42 | #include "unit-name.h" |
4139c1b2 | 43 | #include "dbus-unit.h" |
514f4ef5 | 44 | #include "special.h" |
c6c18be3 | 45 | #include "cgroup-util.h" |
4927fcae | 46 | #include "missing.h" |
ab1f0633 | 47 | #include "cgroup-attr.h" |
87f0e418 LP |
48 | |
49 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
50 | [UNIT_SERVICE] = &service_vtable, | |
51 | [UNIT_TIMER] = &timer_vtable, | |
52 | [UNIT_SOCKET] = &socket_vtable, | |
53 | [UNIT_TARGET] = &target_vtable, | |
54 | [UNIT_DEVICE] = &device_vtable, | |
55 | [UNIT_MOUNT] = &mount_vtable, | |
56 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 57 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
58 | [UNIT_SWAP] = &swap_vtable, |
59 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
60 | }; |
61 | ||
7d17cfbc | 62 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
63 | Unit *u; |
64 | ||
65 | assert(m); | |
ac155bb8 | 66 | assert(size >= sizeof(Unit)); |
87f0e418 | 67 | |
7d17cfbc MS |
68 | u = malloc0(size); |
69 | if (!u) | |
87f0e418 LP |
70 | return NULL; |
71 | ||
ac155bb8 MS |
72 | u->names = set_new(string_hash_func, string_compare_func); |
73 | if (!u->names) { | |
87f0e418 LP |
74 | free(u); |
75 | return NULL; | |
76 | } | |
77 | ||
ac155bb8 MS |
78 | u->manager = m; |
79 | u->type = _UNIT_TYPE_INVALID; | |
80 | u->deserialized_job = _JOB_TYPE_INVALID; | |
81 | u->default_dependencies = true; | |
82 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
87f0e418 LP |
83 | |
84 | return u; | |
85 | } | |
86 | ||
f278026d LP |
87 | bool unit_has_name(Unit *u, const char *name) { |
88 | assert(u); | |
89 | assert(name); | |
90 | ||
ac155bb8 | 91 | return !!set_get(u->names, (char*) name); |
f278026d LP |
92 | } |
93 | ||
87f0e418 LP |
94 | int unit_add_name(Unit *u, const char *text) { |
95 | UnitType t; | |
276c3e78 | 96 | char *s, *i = NULL; |
87f0e418 LP |
97 | int r; |
98 | ||
99 | assert(u); | |
100 | assert(text); | |
101 | ||
9e2f7c11 | 102 | if (unit_name_is_template(text)) { |
ac155bb8 | 103 | if (!u->instance) |
9e2f7c11 | 104 | return -EINVAL; |
87f0e418 | 105 | |
ac155bb8 | 106 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
107 | } else |
108 | s = strdup(text); | |
87f0e418 | 109 | |
9e2f7c11 LP |
110 | if (!s) |
111 | return -ENOMEM; | |
87f0e418 | 112 | |
b9c0d441 | 113 | if (!unit_name_is_valid(s, false)) { |
9e2f7c11 LP |
114 | r = -EINVAL; |
115 | goto fail; | |
116 | } | |
e537352b | 117 | |
9e2f7c11 | 118 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 119 | |
ac155bb8 | 120 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) { |
9e2f7c11 LP |
121 | r = -EINVAL; |
122 | goto fail; | |
123 | } | |
87f0e418 | 124 | |
9e2f7c11 LP |
125 | if ((r = unit_name_to_instance(s, &i)) < 0) |
126 | goto fail; | |
87f0e418 | 127 | |
796ba554 LP |
128 | if (i && unit_vtable[t]->no_instances) { |
129 | r = -EINVAL; | |
9e2f7c11 | 130 | goto fail; |
796ba554 | 131 | } |
9e2f7c11 | 132 | |
276c3e78 LP |
133 | /* Ensure that this unit is either instanced or not instanced, |
134 | * but not both. */ | |
ac155bb8 | 135 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) { |
9e2f7c11 LP |
136 | r = -EINVAL; |
137 | goto fail; | |
138 | } | |
139 | ||
140 | if (unit_vtable[t]->no_alias && | |
ac155bb8 MS |
141 | !set_isempty(u->names) && |
142 | !set_get(u->names, s)) { | |
9e2f7c11 LP |
143 | r = -EEXIST; |
144 | goto fail; | |
145 | } | |
146 | ||
ac155bb8 | 147 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) { |
4f0f902f LP |
148 | r = -E2BIG; |
149 | goto fail; | |
150 | } | |
151 | ||
ac155bb8 | 152 | if ((r = set_put(u->names, s)) < 0) { |
9e2f7c11 LP |
153 | if (r == -EEXIST) |
154 | r = 0; | |
155 | goto fail; | |
87f0e418 LP |
156 | } |
157 | ||
ac155bb8 MS |
158 | if ((r = hashmap_put(u->manager->units, s, u)) < 0) { |
159 | set_remove(u->names, s); | |
9e2f7c11 | 160 | goto fail; |
87f0e418 LP |
161 | } |
162 | ||
ac155bb8 | 163 | if (u->type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 164 | |
ac155bb8 MS |
165 | u->type = t; |
166 | u->id = s; | |
167 | u->instance = i; | |
9e2f7c11 | 168 | |
ac155bb8 | 169 | LIST_PREPEND(Unit, units_by_type, u->manager->units_by_type[t], u); |
e537352b LP |
170 | |
171 | if (UNIT_VTABLE(u)->init) | |
172 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
173 | } else |
174 | free(i); | |
87f0e418 | 175 | |
c1e1601e | 176 | unit_add_to_dbus_queue(u); |
87f0e418 | 177 | return 0; |
9e2f7c11 LP |
178 | |
179 | fail: | |
180 | free(s); | |
181 | free(i); | |
182 | ||
183 | return r; | |
87f0e418 LP |
184 | } |
185 | ||
0ae97ec1 | 186 | int unit_choose_id(Unit *u, const char *name) { |
276c3e78 LP |
187 | char *s, *t = NULL, *i; |
188 | int r; | |
0ae97ec1 LP |
189 | |
190 | assert(u); | |
191 | assert(name); | |
192 | ||
9e2f7c11 LP |
193 | if (unit_name_is_template(name)) { |
194 | ||
ac155bb8 | 195 | if (!u->instance) |
9e2f7c11 LP |
196 | return -EINVAL; |
197 | ||
ac155bb8 | 198 | if (!(t = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
199 | return -ENOMEM; |
200 | ||
201 | name = t; | |
202 | } | |
203 | ||
0ae97ec1 | 204 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 205 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 206 | free(t); |
0ae97ec1 | 207 | |
9e2f7c11 | 208 | if (!s) |
0ae97ec1 LP |
209 | return -ENOENT; |
210 | ||
276c3e78 LP |
211 | if ((r = unit_name_to_instance(s, &i)) < 0) |
212 | return r; | |
213 | ||
ac155bb8 | 214 | u->id = s; |
276c3e78 | 215 | |
ac155bb8 MS |
216 | free(u->instance); |
217 | u->instance = i; | |
276c3e78 | 218 | |
c1e1601e | 219 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 220 | |
0ae97ec1 LP |
221 | return 0; |
222 | } | |
223 | ||
f50e0a01 LP |
224 | int unit_set_description(Unit *u, const char *description) { |
225 | char *s; | |
226 | ||
227 | assert(u); | |
228 | ||
229 | if (!(s = strdup(description))) | |
230 | return -ENOMEM; | |
231 | ||
ac155bb8 MS |
232 | free(u->description); |
233 | u->description = s; | |
c1e1601e LP |
234 | |
235 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
236 | return 0; |
237 | } | |
238 | ||
701cc384 LP |
239 | bool unit_check_gc(Unit *u) { |
240 | assert(u); | |
241 | ||
ac155bb8 | 242 | if (u->load_state == UNIT_STUB) |
b86d44e5 LP |
243 | return true; |
244 | ||
701cc384 LP |
245 | if (UNIT_VTABLE(u)->no_gc) |
246 | return true; | |
247 | ||
ac155bb8 | 248 | if (u->no_gc) |
6c073082 LP |
249 | return true; |
250 | ||
ac155bb8 | 251 | if (u->job) |
701cc384 LP |
252 | return true; |
253 | ||
e0209d83 MS |
254 | if (u->nop_job) |
255 | return true; | |
256 | ||
701cc384 LP |
257 | if (unit_active_state(u) != UNIT_INACTIVE) |
258 | return true; | |
259 | ||
9d576438 LP |
260 | if (u->refs) |
261 | return true; | |
262 | ||
701cc384 LP |
263 | if (UNIT_VTABLE(u)->check_gc) |
264 | if (UNIT_VTABLE(u)->check_gc(u)) | |
265 | return true; | |
266 | ||
267 | return false; | |
268 | } | |
269 | ||
87f0e418 LP |
270 | void unit_add_to_load_queue(Unit *u) { |
271 | assert(u); | |
ac155bb8 | 272 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 273 | |
ac155bb8 | 274 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
275 | return; |
276 | ||
ac155bb8 MS |
277 | LIST_PREPEND(Unit, load_queue, u->manager->load_queue, u); |
278 | u->in_load_queue = true; | |
87f0e418 LP |
279 | } |
280 | ||
23a177ef LP |
281 | void unit_add_to_cleanup_queue(Unit *u) { |
282 | assert(u); | |
283 | ||
ac155bb8 | 284 | if (u->in_cleanup_queue) |
23a177ef LP |
285 | return; |
286 | ||
ac155bb8 MS |
287 | LIST_PREPEND(Unit, cleanup_queue, u->manager->cleanup_queue, u); |
288 | u->in_cleanup_queue = true; | |
23a177ef LP |
289 | } |
290 | ||
701cc384 LP |
291 | void unit_add_to_gc_queue(Unit *u) { |
292 | assert(u); | |
293 | ||
ac155bb8 | 294 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
295 | return; |
296 | ||
297 | if (unit_check_gc(u)) | |
298 | return; | |
299 | ||
ac155bb8 MS |
300 | LIST_PREPEND(Unit, gc_queue, u->manager->gc_queue, u); |
301 | u->in_gc_queue = true; | |
701cc384 | 302 | |
ac155bb8 | 303 | u->manager->n_in_gc_queue ++; |
701cc384 | 304 | |
ac155bb8 MS |
305 | if (u->manager->gc_queue_timestamp <= 0) |
306 | u->manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
701cc384 LP |
307 | } |
308 | ||
c1e1601e LP |
309 | void unit_add_to_dbus_queue(Unit *u) { |
310 | assert(u); | |
ac155bb8 | 311 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 312 | |
ac155bb8 | 313 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
314 | return; |
315 | ||
a567261a | 316 | /* Shortcut things if nobody cares */ |
ac155bb8 MS |
317 | if (!bus_has_subscriber(u->manager)) { |
318 | u->sent_dbus_new_signal = true; | |
94b6dfa2 LP |
319 | return; |
320 | } | |
321 | ||
ac155bb8 MS |
322 | LIST_PREPEND(Unit, dbus_queue, u->manager->dbus_unit_queue, u); |
323 | u->in_dbus_queue = true; | |
c1e1601e LP |
324 | } |
325 | ||
87f0e418 LP |
326 | static void bidi_set_free(Unit *u, Set *s) { |
327 | Iterator i; | |
328 | Unit *other; | |
329 | ||
330 | assert(u); | |
331 | ||
332 | /* Frees the set and makes sure we are dropped from the | |
333 | * inverse pointers */ | |
334 | ||
335 | SET_FOREACH(other, s, i) { | |
336 | UnitDependency d; | |
337 | ||
338 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 339 | set_remove(other->dependencies[d], u); |
701cc384 LP |
340 | |
341 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
342 | } |
343 | ||
344 | set_free(s); | |
345 | } | |
346 | ||
347 | void unit_free(Unit *u) { | |
348 | UnitDependency d; | |
349 | Iterator i; | |
350 | char *t; | |
351 | ||
352 | assert(u); | |
353 | ||
c1e1601e LP |
354 | bus_unit_send_removed_signal(u); |
355 | ||
ac155bb8 | 356 | if (u->load_state != UNIT_STUB) |
a013b84b LP |
357 | if (UNIT_VTABLE(u)->done) |
358 | UNIT_VTABLE(u)->done(u); | |
359 | ||
ac155bb8 MS |
360 | SET_FOREACH(t, u->names, i) |
361 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 362 | |
97e7d748 MS |
363 | if (u->job) { |
364 | Job *j = u->job; | |
365 | job_uninstall(j); | |
366 | job_free(j); | |
367 | } | |
964e0949 | 368 | |
e0209d83 MS |
369 | if (u->nop_job) { |
370 | Job *j = u->nop_job; | |
371 | job_uninstall(j); | |
372 | job_free(j); | |
373 | } | |
374 | ||
964e0949 | 375 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 376 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 377 | |
7c8fa05c LP |
378 | if (u->requires_mounts_for) { |
379 | LIST_REMOVE(Unit, has_requires_mounts_for, u->manager->has_requires_mounts_for, u); | |
380 | strv_free(u->requires_mounts_for); | |
381 | } | |
382 | ||
ac155bb8 MS |
383 | if (u->type != _UNIT_TYPE_INVALID) |
384 | LIST_REMOVE(Unit, units_by_type, u->manager->units_by_type[u->type], u); | |
ef734fd6 | 385 | |
ac155bb8 MS |
386 | if (u->in_load_queue) |
387 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
87f0e418 | 388 | |
ac155bb8 MS |
389 | if (u->in_dbus_queue) |
390 | LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u); | |
c1e1601e | 391 | |
ac155bb8 MS |
392 | if (u->in_cleanup_queue) |
393 | LIST_REMOVE(Unit, cleanup_queue, u->manager->cleanup_queue, u); | |
23a177ef | 394 | |
ac155bb8 MS |
395 | if (u->in_gc_queue) { |
396 | LIST_REMOVE(Unit, gc_queue, u->manager->gc_queue, u); | |
397 | u->manager->n_in_gc_queue--; | |
701cc384 LP |
398 | } |
399 | ||
ac155bb8 MS |
400 | cgroup_bonding_free_list(u->cgroup_bondings, u->manager->n_reloading <= 0); |
401 | cgroup_attribute_free_list(u->cgroup_attributes); | |
87f0e418 | 402 | |
ac155bb8 | 403 | free(u->description); |
49dbfa7b | 404 | strv_free(u->documentation); |
ac155bb8 | 405 | free(u->fragment_path); |
1b64d026 | 406 | free(u->source_path); |
ac155bb8 | 407 | free(u->instance); |
87f0e418 | 408 | |
ac155bb8 | 409 | set_free_free(u->names); |
87f0e418 | 410 | |
ac155bb8 | 411 | condition_free_list(u->conditions); |
52661efd | 412 | |
ac155bb8 MS |
413 | while (u->refs) |
414 | unit_ref_unset(u->refs); | |
57020a3a | 415 | |
87f0e418 LP |
416 | free(u); |
417 | } | |
418 | ||
419 | UnitActiveState unit_active_state(Unit *u) { | |
420 | assert(u); | |
421 | ||
ac155bb8 | 422 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
423 | return unit_active_state(unit_follow_merge(u)); |
424 | ||
425 | /* After a reload it might happen that a unit is not correctly | |
426 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 427 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
428 | |
429 | return UNIT_VTABLE(u)->active_state(u); | |
430 | } | |
431 | ||
10a94420 LP |
432 | const char* unit_sub_state_to_string(Unit *u) { |
433 | assert(u); | |
434 | ||
435 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
436 | } | |
437 | ||
23a177ef LP |
438 | static void complete_move(Set **s, Set **other) { |
439 | assert(s); | |
440 | assert(other); | |
87f0e418 | 441 | |
23a177ef LP |
442 | if (!*other) |
443 | return; | |
87f0e418 LP |
444 | |
445 | if (*s) | |
23a177ef LP |
446 | set_move(*s, *other); |
447 | else { | |
448 | *s = *other; | |
449 | *other = NULL; | |
450 | } | |
451 | } | |
87f0e418 | 452 | |
23a177ef LP |
453 | static void merge_names(Unit *u, Unit *other) { |
454 | char *t; | |
455 | Iterator i; | |
87f0e418 | 456 | |
23a177ef LP |
457 | assert(u); |
458 | assert(other); | |
459 | ||
ac155bb8 | 460 | complete_move(&u->names, &other->names); |
23a177ef | 461 | |
ac155bb8 MS |
462 | set_free_free(other->names); |
463 | other->names = NULL; | |
464 | other->id = NULL; | |
23a177ef | 465 | |
ac155bb8 MS |
466 | SET_FOREACH(t, u->names, i) |
467 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
87f0e418 LP |
468 | } |
469 | ||
23a177ef LP |
470 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
471 | Iterator i; | |
472 | Unit *back; | |
87f0e418 | 473 | int r; |
23a177ef LP |
474 | |
475 | assert(u); | |
476 | assert(other); | |
477 | assert(d < _UNIT_DEPENDENCY_MAX); | |
478 | ||
83a95334 | 479 | /* Fix backwards pointers */ |
ac155bb8 | 480 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
481 | UnitDependency k; |
482 | ||
483 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
ac155bb8 | 484 | if ((r = set_remove_and_put(back->dependencies[k], other, u)) < 0) { |
23a177ef LP |
485 | |
486 | if (r == -EEXIST) | |
ac155bb8 | 487 | set_remove(back->dependencies[k], other); |
23a177ef LP |
488 | else |
489 | assert(r == -ENOENT); | |
490 | } | |
491 | } | |
492 | ||
ac155bb8 | 493 | complete_move(&u->dependencies[d], &other->dependencies[d]); |
23a177ef | 494 | |
ac155bb8 MS |
495 | set_free(other->dependencies[d]); |
496 | other->dependencies[d] = NULL; | |
23a177ef LP |
497 | } |
498 | ||
499 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
500 | UnitDependency d; |
501 | ||
502 | assert(u); | |
503 | assert(other); | |
ac155bb8 MS |
504 | assert(u->manager == other->manager); |
505 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 506 | |
cc916967 LP |
507 | other = unit_follow_merge(other); |
508 | ||
23a177ef LP |
509 | if (other == u) |
510 | return 0; | |
511 | ||
ac155bb8 | 512 | if (u->type != other->type) |
9e2f7c11 LP |
513 | return -EINVAL; |
514 | ||
ac155bb8 | 515 | if (!u->instance != !other->instance) |
87f0e418 LP |
516 | return -EINVAL; |
517 | ||
ac155bb8 MS |
518 | if (other->load_state != UNIT_STUB && |
519 | other->load_state != UNIT_ERROR) | |
23a177ef | 520 | return -EEXIST; |
87f0e418 | 521 | |
ac155bb8 | 522 | if (other->job) |
819e213f LP |
523 | return -EEXIST; |
524 | ||
e0209d83 MS |
525 | if (other->nop_job) |
526 | return -EEXIST; | |
527 | ||
fdf20a31 | 528 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
529 | return -EEXIST; |
530 | ||
87f0e418 | 531 | /* Merge names */ |
23a177ef | 532 | merge_names(u, other); |
87f0e418 | 533 | |
57020a3a | 534 | /* Redirect all references */ |
ac155bb8 MS |
535 | while (other->refs) |
536 | unit_ref_set(other->refs, u); | |
57020a3a | 537 | |
87f0e418 LP |
538 | /* Merge dependencies */ |
539 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 540 | merge_dependencies(u, other, d); |
87f0e418 | 541 | |
ac155bb8 MS |
542 | other->load_state = UNIT_MERGED; |
543 | other->merged_into = u; | |
23a177ef | 544 | |
3616a49c LP |
545 | /* If there is still some data attached to the other node, we |
546 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 547 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
548 | if (UNIT_VTABLE(other)->done) |
549 | UNIT_VTABLE(other)->done(other); | |
550 | ||
551 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
552 | unit_add_to_cleanup_queue(other); |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
557 | int unit_merge_by_name(Unit *u, const char *name) { | |
558 | Unit *other; | |
9e2f7c11 LP |
559 | int r; |
560 | char *s = NULL; | |
23a177ef LP |
561 | |
562 | assert(u); | |
563 | assert(name); | |
564 | ||
9e2f7c11 | 565 | if (unit_name_is_template(name)) { |
ac155bb8 | 566 | if (!u->instance) |
9e2f7c11 LP |
567 | return -EINVAL; |
568 | ||
ac155bb8 | 569 | if (!(s = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
570 | return -ENOMEM; |
571 | ||
572 | name = s; | |
573 | } | |
574 | ||
ac155bb8 | 575 | if (!(other = manager_get_unit(u->manager, name))) |
9e2f7c11 LP |
576 | r = unit_add_name(u, name); |
577 | else | |
578 | r = unit_merge(u, other); | |
23a177ef | 579 | |
9e2f7c11 LP |
580 | free(s); |
581 | return r; | |
23a177ef LP |
582 | } |
583 | ||
584 | Unit* unit_follow_merge(Unit *u) { | |
585 | assert(u); | |
586 | ||
ac155bb8 MS |
587 | while (u->load_state == UNIT_MERGED) |
588 | assert_se(u = u->merged_into); | |
23a177ef LP |
589 | |
590 | return u; | |
591 | } | |
592 | ||
593 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
594 | int r; | |
595 | ||
596 | assert(u); | |
597 | assert(c); | |
598 | ||
ecc6e2b8 LP |
599 | if (c->std_output != EXEC_OUTPUT_KMSG && |
600 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 601 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
602 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
603 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 604 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 605 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 606 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 607 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 608 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 609 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 610 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
611 | return 0; |
612 | ||
613 | /* If syslog or kernel logging is requested, make sure our own | |
614 | * logging daemon is run first. */ | |
615 | ||
67445f4e | 616 | if (u->manager->running_as == SYSTEMD_SYSTEM) |
54fe0cdb | 617 | if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true)) < 0) |
23a177ef LP |
618 | return r; |
619 | ||
87f0e418 LP |
620 | return 0; |
621 | } | |
622 | ||
87f0e418 LP |
623 | const char *unit_description(Unit *u) { |
624 | assert(u); | |
625 | ||
ac155bb8 MS |
626 | if (u->description) |
627 | return u->description; | |
87f0e418 | 628 | |
ac155bb8 | 629 | return strna(u->id); |
87f0e418 LP |
630 | } |
631 | ||
632 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 633 | char *t, **j; |
87f0e418 LP |
634 | UnitDependency d; |
635 | Iterator i; | |
47be870b LP |
636 | char *p2; |
637 | const char *prefix2; | |
173e3821 LP |
638 | char |
639 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
640 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
641 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
642 | timestamp4[FORMAT_TIMESTAMP_MAX], |
643 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 644 | Unit *following; |
87f0e418 LP |
645 | |
646 | assert(u); | |
ac155bb8 | 647 | assert(u->type >= 0); |
87f0e418 LP |
648 | |
649 | if (!prefix) | |
650 | prefix = ""; | |
47be870b LP |
651 | p2 = strappend(prefix, "\t"); |
652 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
653 | |
654 | fprintf(f, | |
40d50879 | 655 | "%s-> Unit %s:\n" |
87f0e418 | 656 | "%s\tDescription: %s\n" |
9e2f7c11 | 657 | "%s\tInstance: %s\n" |
87f0e418 | 658 | "%s\tUnit Load State: %s\n" |
2fad8195 | 659 | "%s\tUnit Active State: %s\n" |
173e3821 | 660 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 661 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 662 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 663 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 LP |
664 | "%s\tGC Check Good: %s\n" |
665 | "%s\tNeed Daemon Reload: %s\n", | |
ac155bb8 | 666 | prefix, u->id, |
87f0e418 | 667 | prefix, unit_description(u), |
ac155bb8 MS |
668 | prefix, strna(u->instance), |
669 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 670 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
671 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
672 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
673 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
674 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 LP |
675 | prefix, yes_no(unit_check_gc(u)), |
676 | prefix, yes_no(unit_need_daemon_reload(u))); | |
0301abf4 | 677 | |
ac155bb8 | 678 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
679 | fprintf(f, "%s\tName: %s\n", prefix, t); |
680 | ||
49dbfa7b LP |
681 | STRV_FOREACH(j, u->documentation) |
682 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
683 | ||
a7f241db | 684 | if ((following = unit_following(u))) |
ac155bb8 | 685 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 686 | |
ac155bb8 MS |
687 | if (u->fragment_path) |
688 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 689 | |
1b64d026 LP |
690 | if (u->source_path) |
691 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
692 | ||
ac155bb8 MS |
693 | if (u->job_timeout > 0) |
694 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout)); | |
faf919f1 | 695 | |
ac155bb8 | 696 | condition_dump_list(u->conditions, f, prefix); |
52661efd | 697 | |
ac155bb8 | 698 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
699 | fprintf(f, |
700 | "%s\tCondition Timestamp: %s\n" | |
701 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
702 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
703 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 704 | |
87f0e418 LP |
705 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
706 | Unit *other; | |
707 | ||
ac155bb8 MS |
708 | SET_FOREACH(other, u->dependencies[d], i) |
709 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
710 | } |
711 | ||
7c8fa05c | 712 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
713 | fprintf(f, |
714 | "%s\tRequiresMountsFor:", prefix); | |
715 | ||
716 | STRV_FOREACH(j, u->requires_mounts_for) | |
717 | fprintf(f, " %s", *j); | |
718 | ||
719 | fputs("\n", f); | |
720 | } | |
721 | ||
ac155bb8 | 722 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 LP |
723 | CGroupBonding *b; |
724 | CGroupAttribute *a; | |
725 | ||
b0650475 | 726 | fprintf(f, |
a40eb732 | 727 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
728 | "%s\tRefuseManualStart: %s\n" |
729 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 730 | "%s\tDefaultDependencies: %s\n" |
c8f4d764 | 731 | "%s\tOnFailureIsolate: %s\n" |
7a6000a6 LP |
732 | "%s\tIgnoreOnIsolate: %s\n" |
733 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
734 | prefix, yes_no(u->stop_when_unneeded), |
735 | prefix, yes_no(u->refuse_manual_start), | |
736 | prefix, yes_no(u->refuse_manual_stop), | |
737 | prefix, yes_no(u->default_dependencies), | |
738 | prefix, yes_no(u->on_failure_isolate), | |
739 | prefix, yes_no(u->ignore_on_isolate), | |
740 | prefix, yes_no(u->ignore_on_snapshot)); | |
741 | ||
742 | LIST_FOREACH(by_unit, b, u->cgroup_bondings) | |
23a177ef LP |
743 | fprintf(f, "%s\tControlGroup: %s:%s\n", |
744 | prefix, b->controller, b->path); | |
8e274523 | 745 | |
ac155bb8 | 746 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) { |
d8bbda91 LP |
747 | char *v = NULL; |
748 | ||
749 | if (a->map_callback) | |
750 | a->map_callback(a->controller, a->name, a->value, &v); | |
751 | ||
ab1f0633 | 752 | fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n", |
d8bbda91 LP |
753 | prefix, a->controller, a->name, v ? v : a->value); |
754 | ||
755 | free(v); | |
756 | } | |
ab1f0633 | 757 | |
23a177ef LP |
758 | if (UNIT_VTABLE(u)->dump) |
759 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 760 | |
ac155bb8 | 761 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
762 | fprintf(f, |
763 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
764 | prefix, u->merged_into->id); |
765 | else if (u->load_state == UNIT_ERROR) | |
766 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 767 | |
87f0e418 | 768 | |
ac155bb8 MS |
769 | if (u->job) |
770 | job_dump(u->job, f, prefix2); | |
87f0e418 | 771 | |
e0209d83 MS |
772 | if (u->nop_job) |
773 | job_dump(u->nop_job, f, prefix2); | |
774 | ||
47be870b | 775 | free(p2); |
87f0e418 LP |
776 | } |
777 | ||
778 | /* Common implementation for multiple backends */ | |
e537352b | 779 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
780 | int r; |
781 | ||
782 | assert(u); | |
23a177ef LP |
783 | |
784 | /* Load a .service file */ | |
e537352b | 785 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
786 | return r; |
787 | ||
ac155bb8 | 788 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
789 | return -ENOENT; |
790 | ||
791 | /* Load drop-in directory data */ | |
792 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
793 | return r; | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | /* Common implementation for multiple backends */ | |
e537352b | 799 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 800 | int r; |
87f0e418 LP |
801 | |
802 | assert(u); | |
803 | ||
23a177ef LP |
804 | /* Same as unit_load_fragment_and_dropin(), but whether |
805 | * something can be loaded or not doesn't matter. */ | |
806 | ||
807 | /* Load a .service file */ | |
e537352b | 808 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
809 | return r; |
810 | ||
ac155bb8 MS |
811 | if (u->load_state == UNIT_STUB) |
812 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 813 | |
87f0e418 | 814 | /* Load drop-in directory data */ |
23a177ef | 815 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
816 | return r; |
817 | ||
23a177ef | 818 | return 0; |
87f0e418 LP |
819 | } |
820 | ||
bba34eed | 821 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
822 | assert(u); |
823 | assert(target); | |
824 | ||
ac155bb8 | 825 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
826 | return 0; |
827 | ||
35b8ca3a | 828 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 829 | * that loop check below is reliable */ |
ac155bb8 MS |
830 | if (u->load_state != UNIT_LOADED || |
831 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
832 | return 0; |
833 | ||
21256a2b LP |
834 | /* If either side wants no automatic dependencies, then let's |
835 | * skip this */ | |
ac155bb8 MS |
836 | if (!u->default_dependencies || |
837 | !target->default_dependencies) | |
21256a2b LP |
838 | return 0; |
839 | ||
98bc2000 | 840 | /* Don't create loops */ |
ac155bb8 | 841 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
842 | return 0; |
843 | ||
844 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
845 | } | |
846 | ||
847 | static int unit_add_default_dependencies(Unit *u) { | |
21256a2b LP |
848 | static const UnitDependency deps[] = { |
849 | UNIT_REQUIRED_BY, | |
850 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
851 | UNIT_WANTED_BY, | |
852 | UNIT_BOUND_BY | |
853 | }; | |
854 | ||
bba34eed | 855 | Unit *target; |
98bc2000 LP |
856 | Iterator i; |
857 | int r; | |
21256a2b | 858 | unsigned k; |
98bc2000 LP |
859 | |
860 | assert(u); | |
861 | ||
21256a2b | 862 | for (k = 0; k < ELEMENTSOF(deps); k++) |
ac155bb8 | 863 | SET_FOREACH(target, u->dependencies[deps[k]], i) |
21256a2b LP |
864 | if ((r = unit_add_default_target_dependency(u, target)) < 0) |
865 | return r; | |
b81884e7 | 866 | |
98bc2000 LP |
867 | return 0; |
868 | } | |
869 | ||
87f0e418 LP |
870 | int unit_load(Unit *u) { |
871 | int r; | |
872 | ||
873 | assert(u); | |
874 | ||
ac155bb8 MS |
875 | if (u->in_load_queue) { |
876 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
877 | u->in_load_queue = false; | |
87f0e418 LP |
878 | } |
879 | ||
ac155bb8 | 880 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
881 | return -EINVAL; |
882 | ||
ac155bb8 | 883 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
884 | return 0; |
885 | ||
e537352b LP |
886 | if (UNIT_VTABLE(u)->load) |
887 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 888 | goto fail; |
23a177ef | 889 | |
ac155bb8 | 890 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
891 | r = -ENOENT; |
892 | goto fail; | |
893 | } | |
894 | ||
ac155bb8 MS |
895 | if (u->load_state == UNIT_LOADED && |
896 | u->default_dependencies) | |
98bc2000 LP |
897 | if ((r = unit_add_default_dependencies(u)) < 0) |
898 | goto fail; | |
899 | ||
7c8fa05c LP |
900 | if (u->load_state == UNIT_LOADED) { |
901 | r = unit_add_mount_links(u); | |
902 | if (r < 0) | |
903 | return r; | |
904 | } | |
905 | ||
ac155bb8 MS |
906 | if (u->on_failure_isolate && |
907 | set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { | |
f68319bb LP |
908 | |
909 | log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", | |
ac155bb8 | 910 | u->id); |
f68319bb LP |
911 | |
912 | r = -EINVAL; | |
913 | goto fail; | |
914 | } | |
915 | ||
ac155bb8 | 916 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
917 | |
918 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 919 | unit_add_to_gc_queue(u); |
87f0e418 | 920 | |
87f0e418 LP |
921 | return 0; |
922 | ||
923 | fail: | |
ac155bb8 MS |
924 | u->load_state = UNIT_ERROR; |
925 | u->load_error = r; | |
c1e1601e | 926 | unit_add_to_dbus_queue(u); |
9a46fc3b | 927 | unit_add_to_gc_queue(u); |
23a177ef | 928 | |
ac155bb8 | 929 | log_debug("Failed to load configuration for %s: %s", u->id, strerror(-r)); |
23a177ef | 930 | |
87f0e418 LP |
931 | return r; |
932 | } | |
933 | ||
90bbc946 LP |
934 | bool unit_condition_test(Unit *u) { |
935 | assert(u); | |
936 | ||
ac155bb8 MS |
937 | dual_timestamp_get(&u->condition_timestamp); |
938 | u->condition_result = condition_test_list(u->conditions); | |
90bbc946 | 939 | |
ac155bb8 | 940 | return u->condition_result; |
90bbc946 LP |
941 | } |
942 | ||
877d54e9 | 943 | static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 944 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
945 | |
946 | assert(u); | |
947 | assert(t >= 0); | |
948 | assert(t < _JOB_TYPE_MAX); | |
949 | ||
950 | if (t != JOB_START && t != JOB_STOP) | |
951 | return NULL; | |
c6918296 MS |
952 | |
953 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
954 | if (!format_table) | |
877d54e9 LP |
955 | return NULL; |
956 | ||
957 | return format_table->starting_stopping[t == JOB_STOP]; | |
958 | } | |
959 | ||
960 | static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { | |
961 | const char *format; | |
962 | ||
963 | assert(u); | |
964 | assert(t >= 0); | |
965 | assert(t < _JOB_TYPE_MAX); | |
966 | ||
967 | format = unit_get_status_message_format(u, t); | |
968 | if (format) | |
969 | return format; | |
970 | ||
971 | /* Return generic strings */ | |
972 | if (t == JOB_START) | |
973 | return "Starting %s."; | |
974 | else if (t == JOB_STOP) | |
975 | return "Stopping %s."; | |
976 | else if (t == JOB_RELOAD) | |
977 | return "Reloading %s."; | |
978 | ||
979 | return NULL; | |
980 | } | |
981 | ||
982 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
983 | const char *format; | |
984 | ||
985 | assert(u); | |
986 | ||
987 | /* We only print status messages for selected units on | |
988 | * selected operations. */ | |
c6918296 | 989 | |
877d54e9 | 990 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
991 | if (!format) |
992 | return; | |
993 | ||
994 | unit_status_printf(u, "", format, unit_description(u)); | |
995 | } | |
996 | ||
877d54e9 LP |
997 | #pragma GCC diagnostic push |
998 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
999 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { | |
1000 | const char *format; | |
1001 | char buf[LINE_MAX]; | |
1002 | sd_id128_t mid; | |
1003 | ||
1004 | assert(u); | |
1005 | ||
1006 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1007 | return; | |
1008 | ||
81270860 LP |
1009 | if (log_on_console()) |
1010 | return; | |
1011 | ||
877d54e9 LP |
1012 | /* We log status messages for all units and all operations. */ |
1013 | ||
1014 | format = unit_get_status_message_format_try_harder(u, t); | |
1015 | if (!format) | |
1016 | return; | |
1017 | ||
1018 | snprintf(buf, sizeof(buf), format, unit_description(u)); | |
1019 | char_array_0(buf); | |
1020 | ||
1021 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1022 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1023 | SD_MESSAGE_UNIT_RELOADING; | |
1024 | ||
bbc9006e MT |
1025 | log_struct_unit(LOG_INFO, |
1026 | u->id, | |
1ca6783f | 1027 | MESSAGE_ID(mid), |
877d54e9 LP |
1028 | "MESSAGE=%s", buf, |
1029 | NULL); | |
1030 | } | |
1031 | #pragma GCC diagnostic pop | |
1032 | ||
87f0e418 | 1033 | /* Errors: |
d5159713 LP |
1034 | * -EBADR: This unit type does not support starting. |
1035 | * -EALREADY: Unit is already started. | |
1036 | * -EAGAIN: An operation is already in progress. Retry later. | |
1037 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
1038 | */ |
1039 | int unit_start(Unit *u) { | |
1040 | UnitActiveState state; | |
92ab323c | 1041 | Unit *following; |
87f0e418 LP |
1042 | |
1043 | assert(u); | |
1044 | ||
ac155bb8 | 1045 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1046 | return -EINVAL; |
1047 | ||
a82e5507 LP |
1048 | /* If this is already started, then this will succeed. Note |
1049 | * that this will even succeed if this unit is not startable | |
1050 | * by the user. This is relied on to detect when we need to | |
1051 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1052 | state = unit_active_state(u); |
1053 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1054 | return -EALREADY; | |
1055 | ||
a82e5507 LP |
1056 | /* If the conditions failed, don't do anything at all. If we |
1057 | * already are activating this call might still be useful to | |
1058 | * speed up activation in case there is some hold-off time, | |
1059 | * but we don't want to recheck the condition in that case. */ | |
1060 | if (state != UNIT_ACTIVATING && | |
1061 | !unit_condition_test(u)) { | |
ac155bb8 | 1062 | log_debug("Starting of %s requested but condition failed. Ignoring.", u->id); |
52661efd LP |
1063 | return -EALREADY; |
1064 | } | |
1065 | ||
92ab323c LP |
1066 | /* Forward to the main object, if we aren't it. */ |
1067 | if ((following = unit_following(u))) { | |
ac155bb8 | 1068 | log_debug("Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1069 | return unit_start(following); |
1070 | } | |
1071 | ||
877d54e9 LP |
1072 | unit_status_log_starting_stopping_reloading(u, JOB_START); |
1073 | unit_status_print_starting_stopping(u, JOB_START); | |
c6918296 | 1074 | |
92ab323c LP |
1075 | /* If it is stopped, but we cannot start it, then fail */ |
1076 | if (!UNIT_VTABLE(u)->start) | |
1077 | return -EBADR; | |
1078 | ||
87f0e418 LP |
1079 | /* We don't suppress calls to ->start() here when we are |
1080 | * already starting, to allow this request to be used as a | |
1081 | * "hurry up" call, for example when the unit is in some "auto | |
1082 | * restart" state where it waits for a holdoff timer to elapse | |
1083 | * before it will start again. */ | |
1084 | ||
c1e1601e | 1085 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1086 | |
87f0e418 LP |
1087 | return UNIT_VTABLE(u)->start(u); |
1088 | } | |
1089 | ||
1090 | bool unit_can_start(Unit *u) { | |
1091 | assert(u); | |
1092 | ||
1093 | return !!UNIT_VTABLE(u)->start; | |
1094 | } | |
1095 | ||
2528a7a6 LP |
1096 | bool unit_can_isolate(Unit *u) { |
1097 | assert(u); | |
1098 | ||
1099 | return unit_can_start(u) && | |
ac155bb8 | 1100 | u->allow_isolate; |
2528a7a6 LP |
1101 | } |
1102 | ||
87f0e418 LP |
1103 | /* Errors: |
1104 | * -EBADR: This unit type does not support stopping. | |
1105 | * -EALREADY: Unit is already stopped. | |
1106 | * -EAGAIN: An operation is already in progress. Retry later. | |
1107 | */ | |
1108 | int unit_stop(Unit *u) { | |
1109 | UnitActiveState state; | |
92ab323c | 1110 | Unit *following; |
87f0e418 LP |
1111 | |
1112 | assert(u); | |
1113 | ||
87f0e418 | 1114 | state = unit_active_state(u); |
fdf20a31 | 1115 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1116 | return -EALREADY; |
1117 | ||
92ab323c | 1118 | if ((following = unit_following(u))) { |
ac155bb8 | 1119 | log_debug("Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1120 | return unit_stop(following); |
1121 | } | |
1122 | ||
877d54e9 LP |
1123 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); |
1124 | unit_status_print_starting_stopping(u, JOB_STOP); | |
c6918296 | 1125 | |
7898b0cf LP |
1126 | if (!UNIT_VTABLE(u)->stop) |
1127 | return -EBADR; | |
1128 | ||
c1e1601e | 1129 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1130 | |
87f0e418 LP |
1131 | return UNIT_VTABLE(u)->stop(u); |
1132 | } | |
1133 | ||
1134 | /* Errors: | |
1135 | * -EBADR: This unit type does not support reloading. | |
1136 | * -ENOEXEC: Unit is not started. | |
1137 | * -EAGAIN: An operation is already in progress. Retry later. | |
1138 | */ | |
1139 | int unit_reload(Unit *u) { | |
1140 | UnitActiveState state; | |
92ab323c | 1141 | Unit *following; |
87f0e418 LP |
1142 | |
1143 | assert(u); | |
1144 | ||
ac155bb8 | 1145 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1146 | return -EINVAL; |
1147 | ||
87f0e418 LP |
1148 | if (!unit_can_reload(u)) |
1149 | return -EBADR; | |
1150 | ||
1151 | state = unit_active_state(u); | |
e364ad06 | 1152 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1153 | return -EALREADY; |
1154 | ||
e364ad06 | 1155 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
1156 | return -ENOEXEC; |
1157 | ||
92ab323c | 1158 | if ((following = unit_following(u))) { |
ac155bb8 | 1159 | log_debug("Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1160 | return unit_reload(following); |
1161 | } | |
1162 | ||
877d54e9 LP |
1163 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); |
1164 | ||
c1e1601e | 1165 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1166 | return UNIT_VTABLE(u)->reload(u); |
1167 | } | |
1168 | ||
1169 | bool unit_can_reload(Unit *u) { | |
1170 | assert(u); | |
1171 | ||
1172 | if (!UNIT_VTABLE(u)->reload) | |
1173 | return false; | |
1174 | ||
1175 | if (!UNIT_VTABLE(u)->can_reload) | |
1176 | return true; | |
1177 | ||
1178 | return UNIT_VTABLE(u)->can_reload(u); | |
1179 | } | |
1180 | ||
b4a16b7b | 1181 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1182 | Iterator i; |
1183 | Unit *other; | |
1184 | ||
1185 | assert(u); | |
1186 | ||
1187 | /* If this service shall be shut down when unneeded then do | |
1188 | * so. */ | |
1189 | ||
ac155bb8 | 1190 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1191 | return; |
1192 | ||
1193 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1194 | return; | |
1195 | ||
ac155bb8 | 1196 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
f60c2665 | 1197 | if (unit_pending_active(other)) |
f3bff0eb LP |
1198 | return; |
1199 | ||
ac155bb8 | 1200 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f60c2665 | 1201 | if (unit_pending_active(other)) |
f3bff0eb LP |
1202 | return; |
1203 | ||
ac155bb8 | 1204 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
f60c2665 | 1205 | if (unit_pending_active(other)) |
f3bff0eb LP |
1206 | return; |
1207 | ||
ac155bb8 | 1208 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
f60c2665 | 1209 | if (unit_pending_active(other)) |
b81884e7 LP |
1210 | return; |
1211 | ||
ac155bb8 | 1212 | log_info("Service %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1213 | |
1214 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1215 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1216 | } |
1217 | ||
87f0e418 LP |
1218 | static void retroactively_start_dependencies(Unit *u) { |
1219 | Iterator i; | |
1220 | Unit *other; | |
1221 | ||
1222 | assert(u); | |
1223 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1224 | ||
ac155bb8 MS |
1225 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1226 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1227 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1228 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1229 | |
7f2cddae | 1230 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1231 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1232 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1233 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1234 | |
ac155bb8 MS |
1235 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1236 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1237 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1238 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1239 | |
ac155bb8 MS |
1240 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
1241 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1242 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1243 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1244 | |
ac155bb8 MS |
1245 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1246 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1247 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1248 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1249 | |
ac155bb8 | 1250 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1251 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1252 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1253 | |
ac155bb8 | 1254 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1255 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1256 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1257 | } |
1258 | ||
1259 | static void retroactively_stop_dependencies(Unit *u) { | |
1260 | Iterator i; | |
1261 | Unit *other; | |
1262 | ||
1263 | assert(u); | |
1264 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1265 | ||
b81884e7 | 1266 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1267 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1268 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1269 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1270 | } |
1271 | ||
1272 | static void check_unneeded_dependencies(Unit *u) { | |
1273 | Iterator i; | |
1274 | Unit *other; | |
1275 | ||
1276 | assert(u); | |
1277 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1278 | |
1279 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1280 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1281 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1282 | unit_check_unneeded(other); |
ac155bb8 | 1283 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1284 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1285 | unit_check_unneeded(other); |
ac155bb8 | 1286 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1287 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1288 | unit_check_unneeded(other); |
ac155bb8 | 1289 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1290 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1291 | unit_check_unneeded(other); |
ac155bb8 | 1292 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1293 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1294 | unit_check_unneeded(other); |
7f2cddae | 1295 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1296 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1297 | unit_check_unneeded(other); | |
87f0e418 LP |
1298 | } |
1299 | ||
c0daa706 LP |
1300 | void unit_trigger_on_failure(Unit *u) { |
1301 | Unit *other; | |
1302 | Iterator i; | |
1303 | ||
1304 | assert(u); | |
1305 | ||
ac155bb8 | 1306 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1307 | return; |
1308 | ||
ac155bb8 | 1309 | log_info("Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1310 | |
ac155bb8 | 1311 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1312 | int r; |
1313 | ||
ac155bb8 | 1314 | if ((r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0) |
222ae6a8 LP |
1315 | log_error("Failed to enqueue OnFailure= job: %s", strerror(-r)); |
1316 | } | |
c0daa706 LP |
1317 | } |
1318 | ||
e2f3b44c | 1319 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
7e6e7b06 | 1320 | bool unexpected; |
a096ed36 | 1321 | |
87f0e418 LP |
1322 | assert(u); |
1323 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1324 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1325 | |
8e471ccd LP |
1326 | /* Note that this is called for all low-level state changes, |
1327 | * even if they might map to the same high-level | |
1328 | * UnitActiveState! That means that ns == os is OK an expected | |
c5315881 | 1329 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1330 | * this function will be called too! */ |
87f0e418 | 1331 | |
ac155bb8 | 1332 | if (u->manager->n_reloading <= 0) { |
bdbf9951 | 1333 | dual_timestamp ts; |
173e3821 | 1334 | |
bdbf9951 | 1335 | dual_timestamp_get(&ts); |
173e3821 | 1336 | |
bdbf9951 | 1337 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1338 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1339 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1340 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1341 | |
1342 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1343 | u->active_enter_timestamp = ts; |
bdbf9951 | 1344 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1345 | u->active_exit_timestamp = ts; |
bdbf9951 LP |
1346 | |
1347 | timer_unit_notify(u, ns); | |
1348 | path_unit_notify(u, ns); | |
1349 | } | |
87f0e418 | 1350 | |
fdf20a31 | 1351 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1352 | cgroup_bonding_trim_list(u->cgroup_bondings, true); |
fb385181 | 1353 | |
ac155bb8 | 1354 | if (u->job) { |
7e6e7b06 | 1355 | unexpected = false; |
87f0e418 | 1356 | |
ac155bb8 | 1357 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1358 | |
1359 | /* So we reached a different state for this | |
1360 | * job. Let's see if we can run it now if it | |
1361 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1362 | job_add_to_run_queue(u->job); |
87f0e418 | 1363 | |
b410e6b9 | 1364 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1365 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1366 | * hence needs to invalidate jobs. */ |
87f0e418 | 1367 | |
ac155bb8 | 1368 | switch (u->job->type) { |
87f0e418 | 1369 | |
b410e6b9 LP |
1370 | case JOB_START: |
1371 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1372 | |
b410e6b9 | 1373 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1374 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1375 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1376 | unexpected = true; |
41b02ec7 | 1377 | |
fdf20a31 | 1378 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1379 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1380 | } |
87f0e418 | 1381 | |
b410e6b9 | 1382 | break; |
87f0e418 | 1383 | |
b410e6b9 LP |
1384 | case JOB_RELOAD: |
1385 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1386 | |
ac155bb8 | 1387 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1388 | if (ns == UNIT_ACTIVE) |
5273510e | 1389 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1390 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1391 | unexpected = true; |
41b02ec7 | 1392 | |
fdf20a31 | 1393 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1394 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1395 | } |
b410e6b9 | 1396 | } |
87f0e418 | 1397 | |
b410e6b9 | 1398 | break; |
87f0e418 | 1399 | |
b410e6b9 LP |
1400 | case JOB_STOP: |
1401 | case JOB_RESTART: | |
1402 | case JOB_TRY_RESTART: | |
87f0e418 | 1403 | |
fdf20a31 | 1404 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1405 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1406 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1407 | unexpected = true; |
5273510e | 1408 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1409 | } |
87f0e418 | 1410 | |
b410e6b9 | 1411 | break; |
87f0e418 | 1412 | |
b410e6b9 LP |
1413 | default: |
1414 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1415 | } |
87f0e418 | 1416 | |
7e6e7b06 LP |
1417 | } else |
1418 | unexpected = true; | |
1419 | ||
ac155bb8 | 1420 | if (u->manager->n_reloading <= 0) { |
f3bff0eb | 1421 | |
bdbf9951 LP |
1422 | /* If this state change happened without being |
1423 | * requested by a job, then let's retroactively start | |
1424 | * or stop dependencies. We skip that step when | |
1425 | * deserializing, since we don't want to create any | |
1426 | * additional jobs just because something is already | |
1427 | * activated. */ | |
1428 | ||
1429 | if (unexpected) { | |
1430 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1431 | retroactively_start_dependencies(u); | |
1432 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1433 | retroactively_stop_dependencies(u); | |
1434 | } | |
5de9682c | 1435 | |
cd0504d0 MS |
1436 | /* stop unneeded units regardless if going down was expected or not */ |
1437 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1438 | check_unneeded_dependencies(u); | |
1439 | ||
bdbf9951 | 1440 | if (ns != os && ns == UNIT_FAILED) { |
bbc9006e MT |
1441 | log_struct_unit(LOG_NOTICE, |
1442 | u->id, | |
23635a85 | 1443 | "MESSAGE=Unit %s entered failed state", u->id, |
23635a85 | 1444 | NULL); |
bdbf9951 | 1445 | unit_trigger_on_failure(u); |
cd6d0a45 | 1446 | } |
3b2775c5 | 1447 | } |
e537352b | 1448 | |
3b2775c5 LP |
1449 | /* Some names are special */ |
1450 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1451 | ||
1452 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1453 | /* The bus just might have become available, | |
1454 | * hence try to connect to it, if we aren't | |
1455 | * yet connected. */ | |
ac155bb8 | 1456 | bus_init(u->manager, true); |
3b2775c5 | 1457 | |
ac155bb8 | 1458 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1459 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
ac155bb8 | 1460 | u->manager->n_reloading <= 0) { |
3b2775c5 | 1461 | /* Write audit record if we have just finished starting up */ |
ac155bb8 MS |
1462 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); |
1463 | u->in_audit = true; | |
3b2775c5 | 1464 | } |
e983b760 | 1465 | |
3b2775c5 | 1466 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
ac155bb8 | 1467 | manager_send_unit_plymouth(u->manager, u); |
bdbf9951 | 1468 | |
3b2775c5 | 1469 | } else { |
bdbf9951 | 1470 | |
3b2775c5 LP |
1471 | /* We don't care about D-Bus here, since we'll get an |
1472 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1473 | |
ac155bb8 | 1474 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1475 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1476 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
ac155bb8 | 1477 | u->manager->n_reloading <= 0) { |
4927fcae | 1478 | |
3b2775c5 LP |
1479 | /* Hmm, if there was no start record written |
1480 | * write it now, so that we always have a nice | |
1481 | * pair */ | |
ac155bb8 MS |
1482 | if (!u->in_audit) { |
1483 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 1484 | |
3b2775c5 | 1485 | if (ns == UNIT_INACTIVE) |
ac155bb8 | 1486 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1487 | } else |
1488 | /* Write audit record if we have just finished shutting down */ | |
ac155bb8 | 1489 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1490 | |
ac155bb8 | 1491 | u->in_audit = false; |
cd6d0a45 | 1492 | } |
f278026d LP |
1493 | } |
1494 | ||
ac155bb8 | 1495 | manager_recheck_journal(u->manager); |
3b2775c5 | 1496 | |
f3bff0eb LP |
1497 | /* Maybe we finished startup and are now ready for being |
1498 | * stopped because unneeded? */ | |
b4a16b7b | 1499 | unit_check_unneeded(u); |
c1e1601e LP |
1500 | |
1501 | unit_add_to_dbus_queue(u); | |
701cc384 | 1502 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1503 | } |
1504 | ||
acbb0225 | 1505 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1506 | struct epoll_event ev; |
1507 | ||
1508 | assert(u); | |
1509 | assert(fd >= 0); | |
acbb0225 | 1510 | assert(w); |
ea430986 | 1511 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1512 | |
1513 | zero(ev); | |
acbb0225 | 1514 | ev.data.ptr = w; |
87f0e418 LP |
1515 | ev.events = events; |
1516 | ||
ac155bb8 | 1517 | if (epoll_ctl(u->manager->epoll_fd, |
acbb0225 LP |
1518 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, |
1519 | fd, | |
1520 | &ev) < 0) | |
1521 | return -errno; | |
87f0e418 | 1522 | |
acbb0225 LP |
1523 | w->fd = fd; |
1524 | w->type = WATCH_FD; | |
ea430986 | 1525 | w->data.unit = u; |
87f0e418 | 1526 | |
acbb0225 | 1527 | return 0; |
87f0e418 LP |
1528 | } |
1529 | ||
acbb0225 | 1530 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1531 | assert(u); |
acbb0225 | 1532 | assert(w); |
87f0e418 | 1533 | |
acbb0225 LP |
1534 | if (w->type == WATCH_INVALID) |
1535 | return; | |
1536 | ||
ea430986 LP |
1537 | assert(w->type == WATCH_FD); |
1538 | assert(w->data.unit == u); | |
ac155bb8 | 1539 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
acbb0225 LP |
1540 | |
1541 | w->fd = -1; | |
1542 | w->type = WATCH_INVALID; | |
ea430986 | 1543 | w->data.unit = NULL; |
87f0e418 LP |
1544 | } |
1545 | ||
1546 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1547 | assert(u); | |
1548 | assert(pid >= 1); | |
1549 | ||
05e343b7 LP |
1550 | /* Watch a specific PID. We only support one unit watching |
1551 | * each PID for now. */ | |
1552 | ||
ac155bb8 | 1553 | return hashmap_put(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1554 | } |
1555 | ||
1556 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1557 | assert(u); | |
1558 | assert(pid >= 1); | |
1559 | ||
ac155bb8 | 1560 | hashmap_remove_value(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1561 | } |
1562 | ||
36697dc0 | 1563 | int unit_watch_timer(Unit *u, clockid_t clock_id, bool relative, usec_t usec, Watch *w) { |
87f0e418 | 1564 | struct itimerspec its; |
acbb0225 | 1565 | int flags, fd; |
87f0e418 LP |
1566 | bool ours; |
1567 | ||
1568 | assert(u); | |
acbb0225 | 1569 | assert(w); |
faf919f1 | 1570 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1571 | |
1572 | /* This will try to reuse the old timer if there is one */ | |
1573 | ||
faf919f1 LP |
1574 | if (w->type == WATCH_UNIT_TIMER) { |
1575 | assert(w->data.unit == u); | |
1576 | assert(w->fd >= 0); | |
1577 | ||
87f0e418 | 1578 | ours = false; |
acbb0225 | 1579 | fd = w->fd; |
faf919f1 LP |
1580 | } else if (w->type == WATCH_INVALID) { |
1581 | ||
87f0e418 | 1582 | ours = true; |
36697dc0 | 1583 | fd = timerfd_create(clock_id, TFD_NONBLOCK|TFD_CLOEXEC); |
68b29a9f | 1584 | if (fd < 0) |
87f0e418 | 1585 | return -errno; |
faf919f1 LP |
1586 | } else |
1587 | assert_not_reached("Invalid watch type"); | |
87f0e418 LP |
1588 | |
1589 | zero(its); | |
1590 | ||
36697dc0 | 1591 | if (usec <= 0) { |
87f0e418 LP |
1592 | /* Set absolute time in the past, but not 0, since we |
1593 | * don't want to disarm the timer */ | |
1594 | its.it_value.tv_sec = 0; | |
1595 | its.it_value.tv_nsec = 1; | |
1596 | ||
1597 | flags = TFD_TIMER_ABSTIME; | |
1598 | } else { | |
36697dc0 LP |
1599 | timespec_store(&its.it_value, usec); |
1600 | flags = relative ? 0 : TFD_TIMER_ABSTIME; | |
87f0e418 LP |
1601 | } |
1602 | ||
1603 | /* This will also flush the elapse counter */ | |
1604 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1605 | goto fail; | |
1606 | ||
acbb0225 LP |
1607 | if (w->type == WATCH_INVALID) { |
1608 | struct epoll_event ev; | |
87f0e418 | 1609 | |
acbb0225 LP |
1610 | zero(ev); |
1611 | ev.data.ptr = w; | |
f94ea366 | 1612 | ev.events = EPOLLIN; |
acbb0225 | 1613 | |
ac155bb8 | 1614 | if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) |
acbb0225 LP |
1615 | goto fail; |
1616 | } | |
1617 | ||
faf919f1 | 1618 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1619 | w->fd = fd; |
ea430986 | 1620 | w->data.unit = u; |
87f0e418 | 1621 | |
87f0e418 LP |
1622 | return 0; |
1623 | ||
1624 | fail: | |
1625 | if (ours) | |
ea430986 | 1626 | close_nointr_nofail(fd); |
87f0e418 LP |
1627 | |
1628 | return -errno; | |
1629 | } | |
1630 | ||
acbb0225 | 1631 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1632 | assert(u); |
acbb0225 | 1633 | assert(w); |
87f0e418 | 1634 | |
acbb0225 | 1635 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1636 | return; |
1637 | ||
faf919f1 LP |
1638 | assert(w->type == WATCH_UNIT_TIMER); |
1639 | assert(w->data.unit == u); | |
1640 | assert(w->fd >= 0); | |
acbb0225 | 1641 | |
ac155bb8 | 1642 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
a16e1123 | 1643 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1644 | |
1645 | w->fd = -1; | |
1646 | w->type = WATCH_INVALID; | |
ea430986 | 1647 | w->data.unit = NULL; |
87f0e418 LP |
1648 | } |
1649 | ||
1650 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1651 | assert(u); | |
1652 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1653 | ||
1654 | switch (j) { | |
1655 | ||
1656 | case JOB_VERIFY_ACTIVE: | |
1657 | case JOB_START: | |
57339f47 | 1658 | case JOB_STOP: |
e0209d83 | 1659 | case JOB_NOP: |
87f0e418 LP |
1660 | return true; |
1661 | ||
87f0e418 LP |
1662 | case JOB_RESTART: |
1663 | case JOB_TRY_RESTART: | |
1664 | return unit_can_start(u); | |
1665 | ||
1666 | case JOB_RELOAD: | |
1667 | return unit_can_reload(u); | |
1668 | ||
1669 | case JOB_RELOAD_OR_START: | |
1670 | return unit_can_reload(u) && unit_can_start(u); | |
1671 | ||
1672 | default: | |
1673 | assert_not_reached("Invalid job type"); | |
1674 | } | |
1675 | } | |
1676 | ||
701cc384 | 1677 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1678 | |
1679 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1680 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1681 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1682 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1683 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1684 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 1685 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 1686 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 1687 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1688 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1689 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 1690 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 1691 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
1692 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1693 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1694 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1695 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1696 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 1697 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
1698 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
1699 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 1700 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 1701 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 1702 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
87f0e418 | 1703 | }; |
701cc384 | 1704 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1705 | |
1706 | assert(u); | |
1707 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1708 | assert(other); |
1709 | ||
9f151f29 LP |
1710 | u = unit_follow_merge(u); |
1711 | other = unit_follow_merge(other); | |
1712 | ||
87f0e418 LP |
1713 | /* We won't allow dependencies on ourselves. We will not |
1714 | * consider them an error however. */ | |
1715 | if (u == other) | |
1716 | return 0; | |
1717 | ||
ac155bb8 | 1718 | if ((r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1719 | return r; |
1720 | ||
5de9682c | 1721 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1722 | if ((r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) |
5de9682c LP |
1723 | return r; |
1724 | ||
701cc384 | 1725 | if (add_reference) |
ac155bb8 MS |
1726 | if ((r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || |
1727 | (r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
701cc384 | 1728 | return r; |
87f0e418 | 1729 | |
ac155bb8 | 1730 | if ((q = set_put(u->dependencies[d], other)) < 0) |
701cc384 | 1731 | return q; |
87f0e418 | 1732 | |
5de9682c | 1733 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1734 | if ((v = set_put(other->dependencies[inverse_table[d]], u)) < 0) { |
5de9682c LP |
1735 | r = v; |
1736 | goto fail; | |
1737 | } | |
701cc384 LP |
1738 | |
1739 | if (add_reference) { | |
ac155bb8 | 1740 | if ((w = set_put(u->dependencies[UNIT_REFERENCES], other)) < 0) { |
701cc384 LP |
1741 | r = w; |
1742 | goto fail; | |
1743 | } | |
1744 | ||
ac155bb8 | 1745 | if ((r = set_put(other->dependencies[UNIT_REFERENCED_BY], u)) < 0) |
701cc384 | 1746 | goto fail; |
87f0e418 LP |
1747 | } |
1748 | ||
c1e1601e | 1749 | unit_add_to_dbus_queue(u); |
87f0e418 | 1750 | return 0; |
701cc384 LP |
1751 | |
1752 | fail: | |
1753 | if (q > 0) | |
ac155bb8 | 1754 | set_remove(u->dependencies[d], other); |
701cc384 LP |
1755 | |
1756 | if (v > 0) | |
ac155bb8 | 1757 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
1758 | |
1759 | if (w > 0) | |
ac155bb8 | 1760 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
1761 | |
1762 | return r; | |
87f0e418 | 1763 | } |
0301abf4 | 1764 | |
2c966c03 LP |
1765 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1766 | int r; | |
1767 | ||
1768 | assert(u); | |
1769 | ||
1770 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1771 | return r; | |
1772 | ||
1773 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1774 | return r; | |
1775 | ||
1776 | return 0; | |
1777 | } | |
1778 | ||
9e2f7c11 LP |
1779 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1780 | char *s; | |
1781 | ||
1782 | assert(u); | |
1783 | assert(name || path); | |
8afbb8e1 | 1784 | assert(p); |
9e2f7c11 LP |
1785 | |
1786 | if (!name) | |
9eb977db | 1787 | name = path_get_file_name(path); |
9e2f7c11 LP |
1788 | |
1789 | if (!unit_name_is_template(name)) { | |
1790 | *p = NULL; | |
1791 | return name; | |
1792 | } | |
1793 | ||
ac155bb8 MS |
1794 | if (u->instance) |
1795 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 LP |
1796 | else { |
1797 | char *i; | |
1798 | ||
8afbb8e1 LP |
1799 | i = unit_name_to_prefix(u->id); |
1800 | if (!i) | |
9e2f7c11 LP |
1801 | return NULL; |
1802 | ||
1803 | s = unit_name_replace_instance(name, i); | |
1804 | free(i); | |
1805 | } | |
1806 | ||
1807 | if (!s) | |
1808 | return NULL; | |
1809 | ||
1810 | *p = s; | |
1811 | return s; | |
1812 | } | |
1813 | ||
701cc384 | 1814 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1815 | Unit *other; |
1816 | int r; | |
8afbb8e1 | 1817 | _cleanup_free_ char *s = NULL; |
09b6b09f | 1818 | |
9e2f7c11 LP |
1819 | assert(u); |
1820 | assert(name || path); | |
09b6b09f | 1821 | |
8afbb8e1 LP |
1822 | name = resolve_template(u, name, path, &s); |
1823 | if (!name) | |
9e2f7c11 | 1824 | return -ENOMEM; |
09b6b09f | 1825 | |
8afbb8e1 LP |
1826 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
1827 | if (r < 0) | |
1828 | return r; | |
9e2f7c11 | 1829 | |
8afbb8e1 | 1830 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
1831 | } |
1832 | ||
2c966c03 LP |
1833 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1834 | Unit *other; | |
1835 | int r; | |
1836 | char *s; | |
1837 | ||
1838 | assert(u); | |
1839 | assert(name || path); | |
1840 | ||
1841 | if (!(name = resolve_template(u, name, path, &s))) | |
1842 | return -ENOMEM; | |
1843 | ||
ac155bb8 | 1844 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1845 | goto finish; |
1846 | ||
1847 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1848 | ||
1849 | finish: | |
1850 | free(s); | |
1851 | return r; | |
1852 | } | |
1853 | ||
701cc384 | 1854 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1855 | Unit *other; |
1856 | int r; | |
9e2f7c11 | 1857 | char *s; |
bd77d0fc | 1858 | |
9e2f7c11 LP |
1859 | assert(u); |
1860 | assert(name || path); | |
bd77d0fc | 1861 | |
9e2f7c11 LP |
1862 | if (!(name = resolve_template(u, name, path, &s))) |
1863 | return -ENOMEM; | |
bd77d0fc | 1864 | |
ac155bb8 | 1865 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1866 | goto finish; |
1867 | ||
701cc384 | 1868 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1869 | |
1870 | finish: | |
1871 | free(s); | |
1872 | return r; | |
bd77d0fc LP |
1873 | } |
1874 | ||
2c966c03 LP |
1875 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1876 | Unit *other; | |
1877 | int r; | |
1878 | char *s; | |
1879 | ||
1880 | assert(u); | |
1881 | assert(name || path); | |
1882 | ||
1883 | if (!(name = resolve_template(u, name, path, &s))) | |
1884 | return -ENOMEM; | |
1885 | ||
ac155bb8 | 1886 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1887 | goto finish; |
1888 | ||
1889 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1890 | goto finish; | |
1891 | ||
1892 | finish: | |
1893 | free(s); | |
1894 | return r; | |
1895 | } | |
1896 | ||
0301abf4 LP |
1897 | int set_unit_path(const char *p) { |
1898 | char *cwd, *c; | |
1899 | int r; | |
1900 | ||
1901 | /* This is mostly for debug purposes */ | |
1902 | ||
1903 | if (path_is_absolute(p)) { | |
1904 | if (!(c = strdup(p))) | |
1905 | return -ENOMEM; | |
1906 | } else { | |
1907 | if (!(cwd = get_current_dir_name())) | |
1908 | return -errno; | |
1909 | ||
1910 | r = asprintf(&c, "%s/%s", cwd, p); | |
1911 | free(cwd); | |
1912 | ||
1913 | if (r < 0) | |
1914 | return -ENOMEM; | |
1915 | } | |
1916 | ||
036643a2 | 1917 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1918 | r = -errno; |
1919 | free(c); | |
1920 | return r; | |
1921 | } | |
1922 | ||
1923 | return 0; | |
1924 | } | |
88066b3a | 1925 | |
ea430986 | 1926 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
1927 | assert(u); |
1928 | ||
ac155bb8 | 1929 | if (!u->id) |
04ade7d2 LP |
1930 | return NULL; |
1931 | ||
48899192 | 1932 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
1933 | } |
1934 | ||
8e274523 | 1935 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
8e274523 LP |
1936 | int r; |
1937 | ||
1938 | assert(u); | |
1939 | assert(b); | |
35d2e7ec | 1940 | |
8e274523 LP |
1941 | assert(b->path); |
1942 | ||
e025b4c3 | 1943 | if (!b->controller) { |
246aa6dd LP |
1944 | b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
1945 | if (!b->controller) | |
1946 | return log_oom(); | |
35d2e7ec | 1947 | |
e025b4c3 LP |
1948 | b->ours = true; |
1949 | } | |
1950 | ||
8e274523 LP |
1951 | /* Ensure this hasn't been added yet */ |
1952 | assert(!b->unit); | |
1953 | ||
d686d8a9 LP |
1954 | if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
1955 | CGroupBonding *l; | |
8e274523 | 1956 | |
ac155bb8 | 1957 | l = hashmap_get(u->manager->cgroup_bondings, b->path); |
d686d8a9 LP |
1958 | LIST_PREPEND(CGroupBonding, by_path, l, b); |
1959 | ||
246aa6dd LP |
1960 | r = hashmap_replace(u->manager->cgroup_bondings, b->path, l); |
1961 | if (r < 0) { | |
d686d8a9 LP |
1962 | LIST_REMOVE(CGroupBonding, by_path, l, b); |
1963 | return r; | |
1964 | } | |
8e274523 LP |
1965 | } |
1966 | ||
ac155bb8 | 1967 | LIST_PREPEND(CGroupBonding, by_unit, u->cgroup_bondings, b); |
8e274523 LP |
1968 | b->unit = u; |
1969 | ||
1970 | return 0; | |
1971 | } | |
1972 | ||
41f9172f | 1973 | char *unit_default_cgroup_path(Unit *u) { |
013b87c0 LP |
1974 | assert(u); |
1975 | ||
ac155bb8 | 1976 | if (u->instance) { |
246aa6dd | 1977 | _cleanup_free_ char *t = NULL; |
013b87c0 | 1978 | |
ac155bb8 | 1979 | t = unit_name_template(u->id); |
cd0ed1db | 1980 | if (!t) |
4f2d528d LP |
1981 | return NULL; |
1982 | ||
246aa6dd | 1983 | return strjoin(u->manager->cgroup_hierarchy, "/", t, "/", u->instance, NULL); |
4f2d528d | 1984 | } else |
246aa6dd | 1985 | return strjoin(u->manager->cgroup_hierarchy, "/", u->id, NULL); |
013b87c0 LP |
1986 | } |
1987 | ||
246aa6dd | 1988 | int unit_add_cgroup_from_text(Unit *u, const char *name, bool overwrite, CGroupBonding **ret) { |
013b87c0 LP |
1989 | char *controller = NULL, *path = NULL; |
1990 | CGroupBonding *b = NULL; | |
e025b4c3 | 1991 | bool ours = false; |
8e274523 LP |
1992 | int r; |
1993 | ||
1994 | assert(u); | |
1995 | assert(name); | |
1996 | ||
246aa6dd LP |
1997 | r = cg_split_spec(name, &controller, &path); |
1998 | if (r < 0) | |
35d2e7ec | 1999 | return r; |
8e274523 | 2000 | |
e025b4c3 | 2001 | if (!path) { |
41f9172f | 2002 | path = unit_default_cgroup_path(u); |
e025b4c3 LP |
2003 | ours = true; |
2004 | } | |
013b87c0 | 2005 | |
e025b4c3 | 2006 | if (!controller) { |
55096547 | 2007 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
e025b4c3 LP |
2008 | ours = true; |
2009 | } | |
013b87c0 | 2010 | |
35d2e7ec LP |
2011 | if (!path || !controller) { |
2012 | free(path); | |
2013 | free(controller); | |
246aa6dd | 2014 | return log_oom(); |
8e274523 LP |
2015 | } |
2016 | ||
246aa6dd LP |
2017 | b = cgroup_bonding_find_list(u->cgroup_bondings, controller); |
2018 | if (b) { | |
2019 | if (streq(path, b->path)) { | |
2020 | free(path); | |
2021 | free(controller); | |
2022 | ||
2023 | if (ret) | |
2024 | *ret = b; | |
2025 | return 0; | |
2026 | } | |
2027 | ||
2028 | if (overwrite && !b->essential) { | |
2029 | free(controller); | |
2030 | ||
2031 | free(b->path); | |
2032 | b->path = path; | |
2033 | ||
2034 | b->ours = ours; | |
2035 | b->realized = false; | |
2036 | ||
2037 | if (ret) | |
2038 | *ret = b; | |
2039 | ||
2040 | return 1; | |
2041 | } | |
2042 | ||
013b87c0 | 2043 | r = -EEXIST; |
246aa6dd | 2044 | b = NULL; |
013b87c0 LP |
2045 | goto fail; |
2046 | } | |
8e274523 | 2047 | |
246aa6dd LP |
2048 | b = new0(CGroupBonding, 1); |
2049 | if (!b) { | |
8e274523 LP |
2050 | r = -ENOMEM; |
2051 | goto fail; | |
2052 | } | |
2053 | ||
013b87c0 LP |
2054 | b->controller = controller; |
2055 | b->path = path; | |
e025b4c3 LP |
2056 | b->ours = ours; |
2057 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
8e274523 | 2058 | |
246aa6dd LP |
2059 | r = unit_add_cgroup(u, b); |
2060 | if (r < 0) | |
8e274523 LP |
2061 | goto fail; |
2062 | ||
246aa6dd LP |
2063 | if (ret) |
2064 | *ret = b; | |
2065 | ||
2066 | return 1; | |
8e274523 LP |
2067 | |
2068 | fail: | |
013b87c0 LP |
2069 | free(path); |
2070 | free(controller); | |
8e274523 LP |
2071 | free(b); |
2072 | ||
2073 | return r; | |
2074 | } | |
2075 | ||
06d4c99a | 2076 | static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
d686d8a9 | 2077 | CGroupBonding *b = NULL; |
8e274523 LP |
2078 | int r = -ENOMEM; |
2079 | ||
2080 | assert(u); | |
2081 | ||
06d4c99a LP |
2082 | if (!controller) |
2083 | controller = SYSTEMD_CGROUP_CONTROLLER; | |
8e274523 | 2084 | |
ac155bb8 | 2085 | if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) |
06d4c99a | 2086 | return 0; |
8e274523 | 2087 | |
246aa6dd LP |
2088 | b = new0(CGroupBonding, 1); |
2089 | if (!b) | |
06d4c99a | 2090 | return -ENOMEM; |
8e274523 | 2091 | |
246aa6dd | 2092 | b->controller = strdup(controller); |
8755586e | 2093 | if (!b->controller) |
06d4c99a | 2094 | goto fail; |
d686d8a9 | 2095 | |
41f9172f LP |
2096 | b->path = unit_default_cgroup_path(u); |
2097 | if (!b->path) | |
06d4c99a | 2098 | goto fail; |
d686d8a9 | 2099 | |
06d4c99a LP |
2100 | b->ours = true; |
2101 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
d686d8a9 | 2102 | |
246aa6dd LP |
2103 | r = unit_add_cgroup(u, b); |
2104 | if (r < 0) | |
06d4c99a | 2105 | goto fail; |
8e274523 LP |
2106 | |
2107 | return 0; | |
2108 | ||
2109 | fail: | |
06d4c99a LP |
2110 | free(b->path); |
2111 | free(b->controller); | |
2112 | free(b); | |
8e274523 LP |
2113 | |
2114 | return r; | |
2115 | } | |
2116 | ||
06d4c99a | 2117 | int unit_add_default_cgroups(Unit *u) { |
ab1f0633 | 2118 | CGroupAttribute *a; |
06d4c99a LP |
2119 | char **c; |
2120 | int r; | |
ab1f0633 | 2121 | |
06d4c99a LP |
2122 | assert(u); |
2123 | ||
2124 | /* Adds in the default cgroups, if they weren't specified | |
2125 | * otherwise. */ | |
2126 | ||
ac155bb8 | 2127 | if (!u->manager->cgroup_hierarchy) |
df18d8c8 LP |
2128 | return 0; |
2129 | ||
246aa6dd LP |
2130 | r = unit_add_one_default_cgroup(u, NULL); |
2131 | if (r < 0) | |
06d4c99a LP |
2132 | return r; |
2133 | ||
ac155bb8 | 2134 | STRV_FOREACH(c, u->manager->default_controllers) |
ab1f0633 LP |
2135 | unit_add_one_default_cgroup(u, *c); |
2136 | ||
ac155bb8 | 2137 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) |
ab1f0633 | 2138 | unit_add_one_default_cgroup(u, a->controller); |
06d4c99a LP |
2139 | |
2140 | return 0; | |
2141 | } | |
2142 | ||
8e274523 LP |
2143 | CGroupBonding* unit_get_default_cgroup(Unit *u) { |
2144 | assert(u); | |
2145 | ||
246aa6dd | 2146 | return cgroup_bonding_find_list(u->cgroup_bondings, NULL); |
8e274523 LP |
2147 | } |
2148 | ||
246aa6dd LP |
2149 | int unit_add_cgroup_attribute( |
2150 | Unit *u, | |
2151 | const char *controller, | |
2152 | const char *name, | |
2153 | const char *value, | |
2154 | CGroupAttributeMapCallback map_callback, | |
2155 | CGroupAttribute **ret) { | |
2156 | ||
2157 | _cleanup_free_ char *c = NULL; | |
ab1f0633 | 2158 | CGroupAttribute *a; |
e884315e | 2159 | int r; |
ab1f0633 LP |
2160 | |
2161 | assert(u); | |
2162 | assert(name); | |
2163 | assert(value); | |
2164 | ||
2165 | if (!controller) { | |
e884315e LP |
2166 | r = cg_controller_from_attr(name, &c); |
2167 | if (r < 0) | |
ab1f0633 LP |
2168 | return -EINVAL; |
2169 | ||
ab1f0633 | 2170 | controller = c; |
e884315e LP |
2171 | } else { |
2172 | if (!filename_is_safe(name)) | |
2173 | return -EINVAL; | |
2174 | ||
2175 | if (!filename_is_safe(controller)) | |
2176 | return -EINVAL; | |
ab1f0633 LP |
2177 | } |
2178 | ||
e884315e | 2179 | if (!controller || streq(controller, SYSTEMD_CGROUP_CONTROLLER)) |
246aa6dd LP |
2180 | return -EINVAL; |
2181 | ||
2182 | a = cgroup_attribute_find_list(u->cgroup_attributes, controller, name); | |
2183 | if (a) { | |
2184 | char *v; | |
2185 | ||
2186 | if (streq(value, a->value)) { | |
2187 | if (ret) | |
2188 | *ret = a; | |
2189 | ||
2190 | return 0; | |
2191 | } | |
2192 | ||
2193 | v = strdup(value); | |
2194 | if (!v) | |
2195 | return -ENOMEM; | |
2196 | ||
2197 | free(a->value); | |
2198 | a->value = v; | |
2199 | ||
2200 | if (ret) | |
2201 | *ret = a; | |
2202 | ||
2203 | return 1; | |
ab1f0633 LP |
2204 | } |
2205 | ||
2206 | a = new0(CGroupAttribute, 1); | |
246aa6dd LP |
2207 | if (!a) |
2208 | return -ENOMEM; | |
ab1f0633 LP |
2209 | |
2210 | if (c) { | |
2211 | a->controller = c; | |
2212 | c = NULL; | |
2213 | } else | |
2214 | a->controller = strdup(controller); | |
2215 | ||
2216 | a->name = strdup(name); | |
2217 | a->value = strdup(value); | |
2218 | ||
2219 | if (!a->controller || !a->name || !a->value) { | |
2220 | free(a->controller); | |
2221 | free(a->name); | |
2222 | free(a->value); | |
2223 | free(a); | |
2224 | ||
2225 | return -ENOMEM; | |
2226 | } | |
2227 | ||
2228 | a->map_callback = map_callback; | |
246aa6dd | 2229 | a->unit = u; |
ab1f0633 | 2230 | |
ac155bb8 | 2231 | LIST_PREPEND(CGroupAttribute, by_unit, u->cgroup_attributes, a); |
ab1f0633 | 2232 | |
246aa6dd LP |
2233 | if (ret) |
2234 | *ret = a; | |
ab1f0633 | 2235 | |
246aa6dd | 2236 | return 1; |
ab1f0633 LP |
2237 | } |
2238 | ||
f6ff8c29 LP |
2239 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
2240 | char *t; | |
2241 | int r; | |
2242 | ||
2243 | assert(u); | |
2244 | assert(type); | |
2245 | assert(_found); | |
2246 | ||
ac155bb8 | 2247 | if (!(t = unit_name_change_suffix(u->id, type))) |
f6ff8c29 LP |
2248 | return -ENOMEM; |
2249 | ||
2250 | assert(!unit_has_name(u, t)); | |
2251 | ||
ac155bb8 | 2252 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
2253 | free(t); |
2254 | ||
9e2f7c11 | 2255 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2256 | |
2257 | return r; | |
2258 | } | |
2259 | ||
a16e1123 LP |
2260 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
2261 | Unit *found; | |
2262 | char *t; | |
2263 | ||
2264 | assert(u); | |
2265 | assert(type); | |
2266 | assert(_found); | |
2267 | ||
ac155bb8 | 2268 | if (!(t = unit_name_change_suffix(u->id, type))) |
a16e1123 LP |
2269 | return -ENOMEM; |
2270 | ||
2271 | assert(!unit_has_name(u, t)); | |
2272 | ||
ac155bb8 | 2273 | found = manager_get_unit(u->manager, t); |
a16e1123 LP |
2274 | free(t); |
2275 | ||
2276 | if (!found) | |
2277 | return -ENOENT; | |
2278 | ||
2279 | *_found = found; | |
2280 | return 0; | |
2281 | } | |
2282 | ||
05e343b7 LP |
2283 | int unit_watch_bus_name(Unit *u, const char *name) { |
2284 | assert(u); | |
2285 | assert(name); | |
2286 | ||
2287 | /* Watch a specific name on the bus. We only support one unit | |
2288 | * watching each name for now. */ | |
2289 | ||
ac155bb8 | 2290 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2291 | } |
2292 | ||
2293 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2294 | assert(u); | |
2295 | assert(name); | |
2296 | ||
ac155bb8 | 2297 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2298 | } |
2299 | ||
a16e1123 LP |
2300 | bool unit_can_serialize(Unit *u) { |
2301 | assert(u); | |
2302 | ||
2303 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2304 | } | |
2305 | ||
6b78f9b4 | 2306 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2307 | int r; |
2308 | ||
2309 | assert(u); | |
2310 | assert(f); | |
2311 | assert(fds); | |
2312 | ||
2313 | if (!unit_can_serialize(u)) | |
2314 | return 0; | |
2315 | ||
2316 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
2317 | return r; | |
2318 | ||
cca098b0 | 2319 | |
6b78f9b4 LP |
2320 | if (serialize_jobs) { |
2321 | if (u->job) { | |
2322 | fprintf(f, "job\n"); | |
2323 | job_serialize(u->job, f, fds); | |
2324 | } | |
2325 | ||
2326 | if (u->nop_job) { | |
2327 | fprintf(f, "job\n"); | |
2328 | job_serialize(u->nop_job, f, fds); | |
2329 | } | |
e0209d83 MS |
2330 | } |
2331 | ||
ac155bb8 MS |
2332 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2333 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2334 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2335 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2336 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
2791a8f8 | 2337 | |
ac155bb8 MS |
2338 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2339 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2340 | |
a16e1123 LP |
2341 | /* End marker */ |
2342 | fputc('\n', f); | |
2343 | return 0; | |
2344 | } | |
2345 | ||
2346 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2347 | va_list ap; | |
2348 | ||
2349 | assert(u); | |
2350 | assert(f); | |
2351 | assert(key); | |
2352 | assert(format); | |
2353 | ||
2354 | fputs(key, f); | |
2355 | fputc('=', f); | |
2356 | ||
2357 | va_start(ap, format); | |
2358 | vfprintf(f, format, ap); | |
2359 | va_end(ap); | |
2360 | ||
2361 | fputc('\n', f); | |
2362 | } | |
2363 | ||
2364 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2365 | assert(u); | |
2366 | assert(f); | |
2367 | assert(key); | |
2368 | assert(value); | |
2369 | ||
2370 | fprintf(f, "%s=%s\n", key, value); | |
2371 | } | |
2372 | ||
2373 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2374 | int r; | |
2375 | ||
2376 | assert(u); | |
2377 | assert(f); | |
2378 | assert(fds); | |
2379 | ||
2380 | if (!unit_can_serialize(u)) | |
2381 | return 0; | |
2382 | ||
2383 | for (;;) { | |
20c03b7b | 2384 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2385 | size_t k; |
2386 | ||
2387 | if (!fgets(line, sizeof(line), f)) { | |
2388 | if (feof(f)) | |
2389 | return 0; | |
2390 | return -errno; | |
2391 | } | |
2392 | ||
10f8e83c | 2393 | char_array_0(line); |
a16e1123 LP |
2394 | l = strstrip(line); |
2395 | ||
2396 | /* End marker */ | |
2397 | if (l[0] == 0) | |
2398 | return 0; | |
2399 | ||
2400 | k = strcspn(l, "="); | |
2401 | ||
2402 | if (l[k] == '=') { | |
2403 | l[k] = 0; | |
2404 | v = l+k+1; | |
2405 | } else | |
2406 | v = l+k; | |
2407 | ||
cca098b0 | 2408 | if (streq(l, "job")) { |
39a18c60 MS |
2409 | if (v[0] == '\0') { |
2410 | /* new-style serialized job */ | |
2411 | Job *j = job_new_raw(u); | |
2412 | if (!j) | |
2413 | return -ENOMEM; | |
2414 | ||
2415 | r = job_deserialize(j, f, fds); | |
2416 | if (r < 0) { | |
2417 | job_free(j); | |
2418 | return r; | |
2419 | } | |
cca098b0 | 2420 | |
39a18c60 MS |
2421 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2422 | if (r < 0) { | |
2423 | job_free(j); | |
2424 | return r; | |
2425 | } | |
e0209d83 MS |
2426 | |
2427 | r = job_install_deserialized(j); | |
2428 | if (r < 0) { | |
2429 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2430 | job_free(j); | |
2431 | return r; | |
2432 | } | |
39a18c60 MS |
2433 | } else { |
2434 | /* legacy */ | |
2435 | JobType type = job_type_from_string(v); | |
2436 | if (type < 0) | |
2437 | log_debug("Failed to parse job type value %s", v); | |
2438 | else | |
2439 | u->deserialized_job = type; | |
2440 | } | |
cca098b0 | 2441 | continue; |
8aaf019b | 2442 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2443 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2444 | continue; |
2445 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2446 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2447 | continue; |
2448 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2449 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2450 | continue; |
2451 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2452 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2453 | continue; |
2791a8f8 | 2454 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2455 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 LP |
2456 | continue; |
2457 | } else if (streq(l, "condition-result")) { | |
2458 | int b; | |
2459 | ||
2460 | if ((b = parse_boolean(v)) < 0) | |
2461 | log_debug("Failed to parse condition result value %s", v); | |
2462 | else | |
ac155bb8 | 2463 | u->condition_result = b; |
efbac6d2 LP |
2464 | |
2465 | continue; | |
8aaf019b | 2466 | } |
cca098b0 | 2467 | |
a16e1123 LP |
2468 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
2469 | return r; | |
2470 | } | |
2471 | } | |
2472 | ||
6e2ef85b LP |
2473 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2474 | Unit *device; | |
2475 | char *e; | |
2476 | int r; | |
2477 | ||
2478 | assert(u); | |
2479 | ||
2480 | if (!what) | |
2481 | return 0; | |
2482 | ||
2483 | /* Adds in links to the device node that this unit is based on */ | |
2484 | ||
8407a5d0 | 2485 | if (!is_device_path(what)) |
6e2ef85b LP |
2486 | return 0; |
2487 | ||
35eb6b12 LP |
2488 | e = unit_name_from_path(what, ".device"); |
2489 | if (!e) | |
6e2ef85b LP |
2490 | return -ENOMEM; |
2491 | ||
ac155bb8 | 2492 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b | 2493 | free(e); |
6e2ef85b LP |
2494 | if (r < 0) |
2495 | return r; | |
2496 | ||
faa368e3 LP |
2497 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true); |
2498 | if (r < 0) | |
6e2ef85b LP |
2499 | return r; |
2500 | ||
faa368e3 LP |
2501 | if (wants) { |
2502 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2503 | if (r < 0) | |
6e2ef85b | 2504 | return r; |
faa368e3 | 2505 | } |
6e2ef85b LP |
2506 | |
2507 | return 0; | |
2508 | } | |
a16e1123 | 2509 | |
cca098b0 LP |
2510 | int unit_coldplug(Unit *u) { |
2511 | int r; | |
2512 | ||
2513 | assert(u); | |
2514 | ||
2515 | if (UNIT_VTABLE(u)->coldplug) | |
2516 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2517 | return r; | |
2518 | ||
39a18c60 MS |
2519 | if (u->job) { |
2520 | r = job_coldplug(u->job); | |
2521 | if (r < 0) | |
2522 | return r; | |
2523 | } else if (u->deserialized_job >= 0) { | |
2524 | /* legacy */ | |
2525 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2526 | if (r < 0) | |
cca098b0 LP |
2527 | return r; |
2528 | ||
ac155bb8 | 2529 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2530 | } |
2531 | ||
2532 | return 0; | |
2533 | } | |
2534 | ||
5831e9b7 | 2535 | void unit_status_printf(Unit *u, const char *status, const char *format, ...) { |
9e58ff9c LP |
2536 | va_list ap; |
2537 | ||
2538 | assert(u); | |
2539 | assert(format); | |
2540 | ||
ac155bb8 | 2541 | if (!manager_get_show_status(u->manager)) |
9e58ff9c LP |
2542 | return; |
2543 | ||
ac155bb8 | 2544 | if (!manager_is_booting_or_shutting_down(u->manager)) |
9e58ff9c LP |
2545 | return; |
2546 | ||
2547 | va_start(ap, format); | |
67e5cc4f | 2548 | status_vprintf(status, true, format, ap); |
9e58ff9c LP |
2549 | va_end(ap); |
2550 | } | |
2551 | ||
45fb0699 | 2552 | bool unit_need_daemon_reload(Unit *u) { |
1b64d026 LP |
2553 | struct stat st; |
2554 | ||
45fb0699 LP |
2555 | assert(u); |
2556 | ||
ac155bb8 | 2557 | if (u->fragment_path) { |
5f4b19f4 | 2558 | zero(st); |
ac155bb8 | 2559 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2560 | /* What, cannot access this anymore? */ |
2561 | return true; | |
45fb0699 | 2562 | |
ac155bb8 MS |
2563 | if (u->fragment_mtime > 0 && |
2564 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2565 | return true; |
2566 | } | |
2567 | ||
1b64d026 LP |
2568 | if (u->source_path) { |
2569 | zero(st); | |
2570 | if (stat(u->source_path, &st) < 0) | |
2571 | return true; | |
2572 | ||
2573 | if (u->source_mtime > 0 && | |
2574 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2575 | return true; | |
2576 | } | |
5f4b19f4 LP |
2577 | |
2578 | return false; | |
45fb0699 LP |
2579 | } |
2580 | ||
fdf20a31 | 2581 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2582 | assert(u); |
2583 | ||
fdf20a31 MM |
2584 | if (UNIT_VTABLE(u)->reset_failed) |
2585 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2586 | } |
2587 | ||
a7f241db LP |
2588 | Unit *unit_following(Unit *u) { |
2589 | assert(u); | |
2590 | ||
2591 | if (UNIT_VTABLE(u)->following) | |
2592 | return UNIT_VTABLE(u)->following(u); | |
2593 | ||
2594 | return NULL; | |
2595 | } | |
2596 | ||
18ffdfda LP |
2597 | bool unit_pending_inactive(Unit *u) { |
2598 | assert(u); | |
2599 | ||
2600 | /* Returns true if the unit is inactive or going down */ | |
2601 | ||
2602 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
2603 | return true; | |
2604 | ||
ac155bb8 | 2605 | if (u->job && u->job->type == JOB_STOP) |
18ffdfda LP |
2606 | return true; |
2607 | ||
2608 | return false; | |
2609 | } | |
2610 | ||
f976f3f6 LP |
2611 | bool unit_pending_active(Unit *u) { |
2612 | assert(u); | |
2613 | ||
f60c2665 | 2614 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2615 | |
2616 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2617 | return true; | |
2618 | ||
ac155bb8 MS |
2619 | if (u->job && |
2620 | (u->job->type == JOB_START || | |
2621 | u->job->type == JOB_RELOAD_OR_START || | |
2622 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2623 | return true; |
2624 | ||
2625 | return false; | |
2626 | } | |
2627 | ||
c74f17d9 | 2628 | int unit_kill(Unit *u, KillWho w, int signo, DBusError *error) { |
8a0867d6 LP |
2629 | assert(u); |
2630 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2631 | assert(signo > 0); |
2632 | assert(signo < _NSIG); | |
2633 | ||
8a0867d6 LP |
2634 | if (!UNIT_VTABLE(u)->kill) |
2635 | return -ENOTSUP; | |
2636 | ||
c74f17d9 | 2637 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2638 | } |
2639 | ||
6210e7fc LP |
2640 | int unit_following_set(Unit *u, Set **s) { |
2641 | assert(u); | |
2642 | assert(s); | |
2643 | ||
2644 | if (UNIT_VTABLE(u)->following_set) | |
2645 | return UNIT_VTABLE(u)->following_set(u, s); | |
2646 | ||
2647 | *s = NULL; | |
2648 | return 0; | |
2649 | } | |
2650 | ||
a4375746 LP |
2651 | UnitFileState unit_get_unit_file_state(Unit *u) { |
2652 | assert(u); | |
2653 | ||
ac155bb8 MS |
2654 | if (u->unit_file_state < 0 && u->fragment_path) |
2655 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 2656 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
9eb977db | 2657 | NULL, path_get_file_name(u->fragment_path)); |
a4375746 | 2658 | |
ac155bb8 | 2659 | return u->unit_file_state; |
a4375746 LP |
2660 | } |
2661 | ||
57020a3a LP |
2662 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
2663 | assert(ref); | |
2664 | assert(u); | |
2665 | ||
2666 | if (ref->unit) | |
2667 | unit_ref_unset(ref); | |
2668 | ||
2669 | ref->unit = u; | |
ac155bb8 | 2670 | LIST_PREPEND(UnitRef, refs, u->refs, ref); |
57020a3a LP |
2671 | return u; |
2672 | } | |
2673 | ||
2674 | void unit_ref_unset(UnitRef *ref) { | |
2675 | assert(ref); | |
2676 | ||
2677 | if (!ref->unit) | |
2678 | return; | |
2679 | ||
ac155bb8 | 2680 | LIST_REMOVE(UnitRef, refs, ref->unit->refs, ref); |
57020a3a LP |
2681 | ref->unit = NULL; |
2682 | } | |
2683 | ||
7c8fa05c LP |
2684 | int unit_add_one_mount_link(Unit *u, Mount *m) { |
2685 | char **i; | |
2686 | ||
2687 | assert(u); | |
2688 | assert(m); | |
2689 | ||
2690 | if (u->load_state != UNIT_LOADED || | |
2691 | UNIT(m)->load_state != UNIT_LOADED) | |
2692 | return 0; | |
2693 | ||
2694 | STRV_FOREACH(i, u->requires_mounts_for) { | |
2695 | ||
2696 | if (UNIT(m) == u) | |
2697 | continue; | |
2698 | ||
2699 | if (!path_startswith(*i, m->where)) | |
2700 | continue; | |
2701 | ||
2702 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true); | |
2703 | } | |
2704 | ||
2705 | return 0; | |
2706 | } | |
2707 | ||
2708 | int unit_add_mount_links(Unit *u) { | |
2709 | Unit *other; | |
2710 | int r; | |
2711 | ||
2712 | assert(u); | |
2713 | ||
2714 | LIST_FOREACH(units_by_type, other, u->manager->units_by_type[UNIT_MOUNT]) { | |
2715 | r = unit_add_one_mount_link(u, MOUNT(other)); | |
2716 | if (r < 0) | |
2717 | return r; | |
2718 | } | |
2719 | ||
2720 | return 0; | |
2721 | } | |
2722 | ||
cba6e062 LP |
2723 | int unit_exec_context_defaults(Unit *u, ExecContext *c) { |
2724 | unsigned i; | |
2725 | int r; | |
2726 | ||
e06c73cc LP |
2727 | assert(u); |
2728 | assert(c); | |
2729 | ||
cba6e062 | 2730 | /* This only copies in the ones that need memory */ |
e06c73cc | 2731 | |
cba6e062 LP |
2732 | for (i = 0; i < RLIMIT_NLIMITS; i++) |
2733 | if (u->manager->rlimit[i] && !c->rlimit[i]) { | |
2734 | c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
2735 | if (!c->rlimit[i]) | |
2736 | return -ENOMEM; | |
2737 | } | |
2738 | ||
67445f4e | 2739 | if (u->manager->running_as == SYSTEMD_USER && |
cba6e062 | 2740 | !c->working_directory) { |
e06c73cc | 2741 | |
cba6e062 LP |
2742 | r = get_home_dir(&c->working_directory); |
2743 | if (r < 0) | |
2744 | return r; | |
2745 | } | |
2746 | ||
2747 | return 0; | |
e06c73cc LP |
2748 | } |
2749 | ||
3ef63c31 LP |
2750 | ExecContext *unit_get_exec_context(Unit *u) { |
2751 | size_t offset; | |
2752 | assert(u); | |
2753 | ||
2754 | offset = UNIT_VTABLE(u)->exec_context_offset; | |
2755 | if (offset <= 0) | |
2756 | return NULL; | |
2757 | ||
2758 | return (ExecContext*) ((uint8_t*) u + offset); | |
2759 | } | |
2760 | ||
94f04347 LP |
2761 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
2762 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2763 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2764 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2765 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2766 | [UNIT_ACTIVATING] = "activating", |
2767 | [UNIT_DEACTIVATING] = "deactivating" | |
2768 | }; | |
2769 | ||
2770 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2771 | ||
2772 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2773 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2774 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 | 2775 | [UNIT_REQUISITE] = "Requisite", |
9e2f7c11 | 2776 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
ac6a4abe MS |
2777 | [UNIT_WANTS] = "Wants", |
2778 | [UNIT_BINDS_TO] = "BindsTo", | |
2779 | [UNIT_PART_OF] = "PartOf", | |
94f04347 | 2780 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2781 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 | 2782 | [UNIT_WANTED_BY] = "WantedBy", |
ac6a4abe MS |
2783 | [UNIT_BOUND_BY] = "BoundBy", |
2784 | [UNIT_CONSISTS_OF] = "ConsistsOf", | |
94f04347 | 2785 | [UNIT_CONFLICTS] = "Conflicts", |
69dd2852 | 2786 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
94f04347 LP |
2787 | [UNIT_BEFORE] = "Before", |
2788 | [UNIT_AFTER] = "After", | |
57020a3a LP |
2789 | [UNIT_ON_FAILURE] = "OnFailure", |
2790 | [UNIT_TRIGGERS] = "Triggers", | |
4dcc1cb4 | 2791 | [UNIT_TRIGGERED_BY] = "TriggeredBy", |
7f2cddae | 2792 | [UNIT_PROPAGATES_RELOAD_TO] = "PropagatesReloadTo", |
ac6a4abe MS |
2793 | [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom", |
2794 | [UNIT_REFERENCES] = "References", | |
2795 | [UNIT_REFERENCED_BY] = "ReferencedBy", | |
94f04347 LP |
2796 | }; |
2797 | ||
2798 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |