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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 LP |
31 | |
32 | #include "set.h" | |
33 | #include "unit.h" | |
34 | #include "macro.h" | |
35 | #include "strv.h" | |
9eb977db | 36 | #include "path-util.h" |
87f0e418 LP |
37 | #include "load-fragment.h" |
38 | #include "load-dropin.h" | |
39 | #include "log.h" | |
9e2f7c11 LP |
40 | #include "unit-name.h" |
41 | #include "specifier.h" | |
4139c1b2 | 42 | #include "dbus-unit.h" |
514f4ef5 | 43 | #include "special.h" |
c6c18be3 | 44 | #include "cgroup-util.h" |
4927fcae | 45 | #include "missing.h" |
ab1f0633 | 46 | #include "cgroup-attr.h" |
87f0e418 LP |
47 | |
48 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
49 | [UNIT_SERVICE] = &service_vtable, | |
50 | [UNIT_TIMER] = &timer_vtable, | |
51 | [UNIT_SOCKET] = &socket_vtable, | |
52 | [UNIT_TARGET] = &target_vtable, | |
53 | [UNIT_DEVICE] = &device_vtable, | |
54 | [UNIT_MOUNT] = &mount_vtable, | |
55 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 56 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
57 | [UNIT_SWAP] = &swap_vtable, |
58 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
59 | }; |
60 | ||
7d17cfbc | 61 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
62 | Unit *u; |
63 | ||
64 | assert(m); | |
ac155bb8 | 65 | assert(size >= sizeof(Unit)); |
87f0e418 | 66 | |
7d17cfbc MS |
67 | u = malloc0(size); |
68 | if (!u) | |
87f0e418 LP |
69 | return NULL; |
70 | ||
ac155bb8 MS |
71 | u->names = set_new(string_hash_func, string_compare_func); |
72 | if (!u->names) { | |
87f0e418 LP |
73 | free(u); |
74 | return NULL; | |
75 | } | |
76 | ||
ac155bb8 MS |
77 | u->manager = m; |
78 | u->type = _UNIT_TYPE_INVALID; | |
79 | u->deserialized_job = _JOB_TYPE_INVALID; | |
80 | u->default_dependencies = true; | |
81 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
87f0e418 LP |
82 | |
83 | return u; | |
84 | } | |
85 | ||
f278026d LP |
86 | bool unit_has_name(Unit *u, const char *name) { |
87 | assert(u); | |
88 | assert(name); | |
89 | ||
ac155bb8 | 90 | return !!set_get(u->names, (char*) name); |
f278026d LP |
91 | } |
92 | ||
87f0e418 LP |
93 | int unit_add_name(Unit *u, const char *text) { |
94 | UnitType t; | |
276c3e78 | 95 | char *s, *i = NULL; |
87f0e418 LP |
96 | int r; |
97 | ||
98 | assert(u); | |
99 | assert(text); | |
100 | ||
9e2f7c11 | 101 | if (unit_name_is_template(text)) { |
ac155bb8 | 102 | if (!u->instance) |
9e2f7c11 | 103 | return -EINVAL; |
87f0e418 | 104 | |
ac155bb8 | 105 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
106 | } else |
107 | s = strdup(text); | |
87f0e418 | 108 | |
9e2f7c11 LP |
109 | if (!s) |
110 | return -ENOMEM; | |
87f0e418 | 111 | |
b9c0d441 | 112 | if (!unit_name_is_valid(s, false)) { |
9e2f7c11 LP |
113 | r = -EINVAL; |
114 | goto fail; | |
115 | } | |
e537352b | 116 | |
9e2f7c11 | 117 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 118 | |
ac155bb8 | 119 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) { |
9e2f7c11 LP |
120 | r = -EINVAL; |
121 | goto fail; | |
122 | } | |
87f0e418 | 123 | |
9e2f7c11 LP |
124 | if ((r = unit_name_to_instance(s, &i)) < 0) |
125 | goto fail; | |
87f0e418 | 126 | |
796ba554 LP |
127 | if (i && unit_vtable[t]->no_instances) { |
128 | r = -EINVAL; | |
9e2f7c11 | 129 | goto fail; |
796ba554 | 130 | } |
9e2f7c11 | 131 | |
276c3e78 LP |
132 | /* Ensure that this unit is either instanced or not instanced, |
133 | * but not both. */ | |
ac155bb8 | 134 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) { |
9e2f7c11 LP |
135 | r = -EINVAL; |
136 | goto fail; | |
137 | } | |
138 | ||
139 | if (unit_vtable[t]->no_alias && | |
ac155bb8 MS |
140 | !set_isempty(u->names) && |
141 | !set_get(u->names, s)) { | |
9e2f7c11 LP |
142 | r = -EEXIST; |
143 | goto fail; | |
144 | } | |
145 | ||
ac155bb8 | 146 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) { |
4f0f902f LP |
147 | r = -E2BIG; |
148 | goto fail; | |
149 | } | |
150 | ||
ac155bb8 | 151 | if ((r = set_put(u->names, s)) < 0) { |
9e2f7c11 LP |
152 | if (r == -EEXIST) |
153 | r = 0; | |
154 | goto fail; | |
87f0e418 LP |
155 | } |
156 | ||
ac155bb8 MS |
157 | if ((r = hashmap_put(u->manager->units, s, u)) < 0) { |
158 | set_remove(u->names, s); | |
9e2f7c11 | 159 | goto fail; |
87f0e418 LP |
160 | } |
161 | ||
ac155bb8 | 162 | if (u->type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 163 | |
ac155bb8 MS |
164 | u->type = t; |
165 | u->id = s; | |
166 | u->instance = i; | |
9e2f7c11 | 167 | |
ac155bb8 | 168 | LIST_PREPEND(Unit, units_by_type, u->manager->units_by_type[t], u); |
e537352b LP |
169 | |
170 | if (UNIT_VTABLE(u)->init) | |
171 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
172 | } else |
173 | free(i); | |
87f0e418 | 174 | |
c1e1601e | 175 | unit_add_to_dbus_queue(u); |
87f0e418 | 176 | return 0; |
9e2f7c11 LP |
177 | |
178 | fail: | |
179 | free(s); | |
180 | free(i); | |
181 | ||
182 | return r; | |
87f0e418 LP |
183 | } |
184 | ||
0ae97ec1 | 185 | int unit_choose_id(Unit *u, const char *name) { |
276c3e78 LP |
186 | char *s, *t = NULL, *i; |
187 | int r; | |
0ae97ec1 LP |
188 | |
189 | assert(u); | |
190 | assert(name); | |
191 | ||
9e2f7c11 LP |
192 | if (unit_name_is_template(name)) { |
193 | ||
ac155bb8 | 194 | if (!u->instance) |
9e2f7c11 LP |
195 | return -EINVAL; |
196 | ||
ac155bb8 | 197 | if (!(t = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
198 | return -ENOMEM; |
199 | ||
200 | name = t; | |
201 | } | |
202 | ||
0ae97ec1 | 203 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 204 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 205 | free(t); |
0ae97ec1 | 206 | |
9e2f7c11 | 207 | if (!s) |
0ae97ec1 LP |
208 | return -ENOENT; |
209 | ||
276c3e78 LP |
210 | if ((r = unit_name_to_instance(s, &i)) < 0) |
211 | return r; | |
212 | ||
ac155bb8 | 213 | u->id = s; |
276c3e78 | 214 | |
ac155bb8 MS |
215 | free(u->instance); |
216 | u->instance = i; | |
276c3e78 | 217 | |
c1e1601e | 218 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 219 | |
0ae97ec1 LP |
220 | return 0; |
221 | } | |
222 | ||
f50e0a01 LP |
223 | int unit_set_description(Unit *u, const char *description) { |
224 | char *s; | |
225 | ||
226 | assert(u); | |
227 | ||
228 | if (!(s = strdup(description))) | |
229 | return -ENOMEM; | |
230 | ||
ac155bb8 MS |
231 | free(u->description); |
232 | u->description = s; | |
c1e1601e LP |
233 | |
234 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
235 | return 0; |
236 | } | |
237 | ||
701cc384 LP |
238 | bool unit_check_gc(Unit *u) { |
239 | assert(u); | |
240 | ||
ac155bb8 | 241 | if (u->load_state == UNIT_STUB) |
b86d44e5 LP |
242 | return true; |
243 | ||
701cc384 LP |
244 | if (UNIT_VTABLE(u)->no_gc) |
245 | return true; | |
246 | ||
ac155bb8 | 247 | if (u->no_gc) |
6c073082 LP |
248 | return true; |
249 | ||
ac155bb8 | 250 | if (u->job) |
701cc384 LP |
251 | return true; |
252 | ||
e0209d83 MS |
253 | if (u->nop_job) |
254 | return true; | |
255 | ||
701cc384 LP |
256 | if (unit_active_state(u) != UNIT_INACTIVE) |
257 | return true; | |
258 | ||
259 | if (UNIT_VTABLE(u)->check_gc) | |
260 | if (UNIT_VTABLE(u)->check_gc(u)) | |
261 | return true; | |
262 | ||
263 | return false; | |
264 | } | |
265 | ||
87f0e418 LP |
266 | void unit_add_to_load_queue(Unit *u) { |
267 | assert(u); | |
ac155bb8 | 268 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 269 | |
ac155bb8 | 270 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
271 | return; |
272 | ||
ac155bb8 MS |
273 | LIST_PREPEND(Unit, load_queue, u->manager->load_queue, u); |
274 | u->in_load_queue = true; | |
87f0e418 LP |
275 | } |
276 | ||
23a177ef LP |
277 | void unit_add_to_cleanup_queue(Unit *u) { |
278 | assert(u); | |
279 | ||
ac155bb8 | 280 | if (u->in_cleanup_queue) |
23a177ef LP |
281 | return; |
282 | ||
ac155bb8 MS |
283 | LIST_PREPEND(Unit, cleanup_queue, u->manager->cleanup_queue, u); |
284 | u->in_cleanup_queue = true; | |
23a177ef LP |
285 | } |
286 | ||
701cc384 LP |
287 | void unit_add_to_gc_queue(Unit *u) { |
288 | assert(u); | |
289 | ||
ac155bb8 | 290 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
291 | return; |
292 | ||
293 | if (unit_check_gc(u)) | |
294 | return; | |
295 | ||
ac155bb8 MS |
296 | LIST_PREPEND(Unit, gc_queue, u->manager->gc_queue, u); |
297 | u->in_gc_queue = true; | |
701cc384 | 298 | |
ac155bb8 | 299 | u->manager->n_in_gc_queue ++; |
701cc384 | 300 | |
ac155bb8 MS |
301 | if (u->manager->gc_queue_timestamp <= 0) |
302 | u->manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
701cc384 LP |
303 | } |
304 | ||
c1e1601e LP |
305 | void unit_add_to_dbus_queue(Unit *u) { |
306 | assert(u); | |
ac155bb8 | 307 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 308 | |
ac155bb8 | 309 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
310 | return; |
311 | ||
a567261a | 312 | /* Shortcut things if nobody cares */ |
ac155bb8 MS |
313 | if (!bus_has_subscriber(u->manager)) { |
314 | u->sent_dbus_new_signal = true; | |
94b6dfa2 LP |
315 | return; |
316 | } | |
317 | ||
ac155bb8 MS |
318 | LIST_PREPEND(Unit, dbus_queue, u->manager->dbus_unit_queue, u); |
319 | u->in_dbus_queue = true; | |
c1e1601e LP |
320 | } |
321 | ||
87f0e418 LP |
322 | static void bidi_set_free(Unit *u, Set *s) { |
323 | Iterator i; | |
324 | Unit *other; | |
325 | ||
326 | assert(u); | |
327 | ||
328 | /* Frees the set and makes sure we are dropped from the | |
329 | * inverse pointers */ | |
330 | ||
331 | SET_FOREACH(other, s, i) { | |
332 | UnitDependency d; | |
333 | ||
334 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 335 | set_remove(other->dependencies[d], u); |
701cc384 LP |
336 | |
337 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
338 | } |
339 | ||
340 | set_free(s); | |
341 | } | |
342 | ||
343 | void unit_free(Unit *u) { | |
344 | UnitDependency d; | |
345 | Iterator i; | |
346 | char *t; | |
347 | ||
348 | assert(u); | |
349 | ||
c1e1601e LP |
350 | bus_unit_send_removed_signal(u); |
351 | ||
ac155bb8 | 352 | if (u->load_state != UNIT_STUB) |
a013b84b LP |
353 | if (UNIT_VTABLE(u)->done) |
354 | UNIT_VTABLE(u)->done(u); | |
355 | ||
ac155bb8 MS |
356 | SET_FOREACH(t, u->names, i) |
357 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 358 | |
97e7d748 MS |
359 | if (u->job) { |
360 | Job *j = u->job; | |
361 | job_uninstall(j); | |
362 | job_free(j); | |
363 | } | |
964e0949 | 364 | |
e0209d83 MS |
365 | if (u->nop_job) { |
366 | Job *j = u->nop_job; | |
367 | job_uninstall(j); | |
368 | job_free(j); | |
369 | } | |
370 | ||
964e0949 | 371 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 372 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 373 | |
7c8fa05c LP |
374 | if (u->requires_mounts_for) { |
375 | LIST_REMOVE(Unit, has_requires_mounts_for, u->manager->has_requires_mounts_for, u); | |
376 | strv_free(u->requires_mounts_for); | |
377 | } | |
378 | ||
ac155bb8 MS |
379 | if (u->type != _UNIT_TYPE_INVALID) |
380 | LIST_REMOVE(Unit, units_by_type, u->manager->units_by_type[u->type], u); | |
ef734fd6 | 381 | |
ac155bb8 MS |
382 | if (u->in_load_queue) |
383 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
87f0e418 | 384 | |
ac155bb8 MS |
385 | if (u->in_dbus_queue) |
386 | LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u); | |
c1e1601e | 387 | |
ac155bb8 MS |
388 | if (u->in_cleanup_queue) |
389 | LIST_REMOVE(Unit, cleanup_queue, u->manager->cleanup_queue, u); | |
23a177ef | 390 | |
ac155bb8 MS |
391 | if (u->in_gc_queue) { |
392 | LIST_REMOVE(Unit, gc_queue, u->manager->gc_queue, u); | |
393 | u->manager->n_in_gc_queue--; | |
701cc384 LP |
394 | } |
395 | ||
ac155bb8 MS |
396 | cgroup_bonding_free_list(u->cgroup_bondings, u->manager->n_reloading <= 0); |
397 | cgroup_attribute_free_list(u->cgroup_attributes); | |
87f0e418 | 398 | |
ac155bb8 | 399 | free(u->description); |
49dbfa7b | 400 | strv_free(u->documentation); |
ac155bb8 | 401 | free(u->fragment_path); |
1b64d026 | 402 | free(u->source_path); |
ac155bb8 | 403 | free(u->instance); |
87f0e418 | 404 | |
ac155bb8 | 405 | set_free_free(u->names); |
87f0e418 | 406 | |
ac155bb8 | 407 | condition_free_list(u->conditions); |
52661efd | 408 | |
ac155bb8 MS |
409 | while (u->refs) |
410 | unit_ref_unset(u->refs); | |
57020a3a | 411 | |
87f0e418 LP |
412 | free(u); |
413 | } | |
414 | ||
415 | UnitActiveState unit_active_state(Unit *u) { | |
416 | assert(u); | |
417 | ||
ac155bb8 | 418 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
419 | return unit_active_state(unit_follow_merge(u)); |
420 | ||
421 | /* After a reload it might happen that a unit is not correctly | |
422 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 423 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
424 | |
425 | return UNIT_VTABLE(u)->active_state(u); | |
426 | } | |
427 | ||
10a94420 LP |
428 | const char* unit_sub_state_to_string(Unit *u) { |
429 | assert(u); | |
430 | ||
431 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
432 | } | |
433 | ||
23a177ef LP |
434 | static void complete_move(Set **s, Set **other) { |
435 | assert(s); | |
436 | assert(other); | |
87f0e418 | 437 | |
23a177ef LP |
438 | if (!*other) |
439 | return; | |
87f0e418 LP |
440 | |
441 | if (*s) | |
23a177ef LP |
442 | set_move(*s, *other); |
443 | else { | |
444 | *s = *other; | |
445 | *other = NULL; | |
446 | } | |
447 | } | |
87f0e418 | 448 | |
23a177ef LP |
449 | static void merge_names(Unit *u, Unit *other) { |
450 | char *t; | |
451 | Iterator i; | |
87f0e418 | 452 | |
23a177ef LP |
453 | assert(u); |
454 | assert(other); | |
455 | ||
ac155bb8 | 456 | complete_move(&u->names, &other->names); |
23a177ef | 457 | |
ac155bb8 MS |
458 | set_free_free(other->names); |
459 | other->names = NULL; | |
460 | other->id = NULL; | |
23a177ef | 461 | |
ac155bb8 MS |
462 | SET_FOREACH(t, u->names, i) |
463 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
87f0e418 LP |
464 | } |
465 | ||
23a177ef LP |
466 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
467 | Iterator i; | |
468 | Unit *back; | |
87f0e418 | 469 | int r; |
23a177ef LP |
470 | |
471 | assert(u); | |
472 | assert(other); | |
473 | assert(d < _UNIT_DEPENDENCY_MAX); | |
474 | ||
83a95334 | 475 | /* Fix backwards pointers */ |
ac155bb8 | 476 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
477 | UnitDependency k; |
478 | ||
479 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
ac155bb8 | 480 | if ((r = set_remove_and_put(back->dependencies[k], other, u)) < 0) { |
23a177ef LP |
481 | |
482 | if (r == -EEXIST) | |
ac155bb8 | 483 | set_remove(back->dependencies[k], other); |
23a177ef LP |
484 | else |
485 | assert(r == -ENOENT); | |
486 | } | |
487 | } | |
488 | ||
ac155bb8 | 489 | complete_move(&u->dependencies[d], &other->dependencies[d]); |
23a177ef | 490 | |
ac155bb8 MS |
491 | set_free(other->dependencies[d]); |
492 | other->dependencies[d] = NULL; | |
23a177ef LP |
493 | } |
494 | ||
495 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
496 | UnitDependency d; |
497 | ||
498 | assert(u); | |
499 | assert(other); | |
ac155bb8 MS |
500 | assert(u->manager == other->manager); |
501 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 502 | |
cc916967 LP |
503 | other = unit_follow_merge(other); |
504 | ||
23a177ef LP |
505 | if (other == u) |
506 | return 0; | |
507 | ||
ac155bb8 | 508 | if (u->type != other->type) |
9e2f7c11 LP |
509 | return -EINVAL; |
510 | ||
ac155bb8 | 511 | if (!u->instance != !other->instance) |
87f0e418 LP |
512 | return -EINVAL; |
513 | ||
ac155bb8 MS |
514 | if (other->load_state != UNIT_STUB && |
515 | other->load_state != UNIT_ERROR) | |
23a177ef | 516 | return -EEXIST; |
87f0e418 | 517 | |
ac155bb8 | 518 | if (other->job) |
819e213f LP |
519 | return -EEXIST; |
520 | ||
e0209d83 MS |
521 | if (other->nop_job) |
522 | return -EEXIST; | |
523 | ||
fdf20a31 | 524 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
525 | return -EEXIST; |
526 | ||
87f0e418 | 527 | /* Merge names */ |
23a177ef | 528 | merge_names(u, other); |
87f0e418 | 529 | |
57020a3a | 530 | /* Redirect all references */ |
ac155bb8 MS |
531 | while (other->refs) |
532 | unit_ref_set(other->refs, u); | |
57020a3a | 533 | |
87f0e418 LP |
534 | /* Merge dependencies */ |
535 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 536 | merge_dependencies(u, other, d); |
87f0e418 | 537 | |
ac155bb8 MS |
538 | other->load_state = UNIT_MERGED; |
539 | other->merged_into = u; | |
23a177ef | 540 | |
3616a49c LP |
541 | /* If there is still some data attached to the other node, we |
542 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 543 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
544 | if (UNIT_VTABLE(other)->done) |
545 | UNIT_VTABLE(other)->done(other); | |
546 | ||
547 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
548 | unit_add_to_cleanup_queue(other); |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | int unit_merge_by_name(Unit *u, const char *name) { | |
554 | Unit *other; | |
9e2f7c11 LP |
555 | int r; |
556 | char *s = NULL; | |
23a177ef LP |
557 | |
558 | assert(u); | |
559 | assert(name); | |
560 | ||
9e2f7c11 | 561 | if (unit_name_is_template(name)) { |
ac155bb8 | 562 | if (!u->instance) |
9e2f7c11 LP |
563 | return -EINVAL; |
564 | ||
ac155bb8 | 565 | if (!(s = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
566 | return -ENOMEM; |
567 | ||
568 | name = s; | |
569 | } | |
570 | ||
ac155bb8 | 571 | if (!(other = manager_get_unit(u->manager, name))) |
9e2f7c11 LP |
572 | r = unit_add_name(u, name); |
573 | else | |
574 | r = unit_merge(u, other); | |
23a177ef | 575 | |
9e2f7c11 LP |
576 | free(s); |
577 | return r; | |
23a177ef LP |
578 | } |
579 | ||
580 | Unit* unit_follow_merge(Unit *u) { | |
581 | assert(u); | |
582 | ||
ac155bb8 MS |
583 | while (u->load_state == UNIT_MERGED) |
584 | assert_se(u = u->merged_into); | |
23a177ef LP |
585 | |
586 | return u; | |
587 | } | |
588 | ||
589 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
590 | int r; | |
591 | ||
592 | assert(u); | |
593 | assert(c); | |
594 | ||
ecc6e2b8 LP |
595 | if (c->std_output != EXEC_OUTPUT_KMSG && |
596 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 597 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
598 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
599 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 600 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 601 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 602 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 603 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 604 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 605 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 606 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
607 | return 0; |
608 | ||
609 | /* If syslog or kernel logging is requested, make sure our own | |
610 | * logging daemon is run first. */ | |
611 | ||
ac155bb8 | 612 | if (u->manager->running_as == MANAGER_SYSTEM) |
54fe0cdb | 613 | if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true)) < 0) |
23a177ef LP |
614 | return r; |
615 | ||
87f0e418 LP |
616 | return 0; |
617 | } | |
618 | ||
87f0e418 LP |
619 | const char *unit_description(Unit *u) { |
620 | assert(u); | |
621 | ||
ac155bb8 MS |
622 | if (u->description) |
623 | return u->description; | |
87f0e418 | 624 | |
ac155bb8 | 625 | return strna(u->id); |
87f0e418 LP |
626 | } |
627 | ||
628 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 629 | char *t, **j; |
87f0e418 LP |
630 | UnitDependency d; |
631 | Iterator i; | |
47be870b LP |
632 | char *p2; |
633 | const char *prefix2; | |
173e3821 LP |
634 | char |
635 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
636 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
637 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
638 | timestamp4[FORMAT_TIMESTAMP_MAX], |
639 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 640 | Unit *following; |
87f0e418 LP |
641 | |
642 | assert(u); | |
ac155bb8 | 643 | assert(u->type >= 0); |
87f0e418 LP |
644 | |
645 | if (!prefix) | |
646 | prefix = ""; | |
47be870b LP |
647 | p2 = strappend(prefix, "\t"); |
648 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
649 | |
650 | fprintf(f, | |
40d50879 | 651 | "%s-> Unit %s:\n" |
87f0e418 | 652 | "%s\tDescription: %s\n" |
9e2f7c11 | 653 | "%s\tInstance: %s\n" |
87f0e418 | 654 | "%s\tUnit Load State: %s\n" |
2fad8195 | 655 | "%s\tUnit Active State: %s\n" |
173e3821 | 656 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 657 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 658 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 659 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 LP |
660 | "%s\tGC Check Good: %s\n" |
661 | "%s\tNeed Daemon Reload: %s\n", | |
ac155bb8 | 662 | prefix, u->id, |
87f0e418 | 663 | prefix, unit_description(u), |
ac155bb8 MS |
664 | prefix, strna(u->instance), |
665 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 666 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
667 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
668 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
669 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
670 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 LP |
671 | prefix, yes_no(unit_check_gc(u)), |
672 | prefix, yes_no(unit_need_daemon_reload(u))); | |
0301abf4 | 673 | |
ac155bb8 | 674 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
675 | fprintf(f, "%s\tName: %s\n", prefix, t); |
676 | ||
49dbfa7b LP |
677 | STRV_FOREACH(j, u->documentation) |
678 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
679 | ||
a7f241db | 680 | if ((following = unit_following(u))) |
ac155bb8 | 681 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 682 | |
ac155bb8 MS |
683 | if (u->fragment_path) |
684 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 685 | |
1b64d026 LP |
686 | if (u->source_path) |
687 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
688 | ||
ac155bb8 MS |
689 | if (u->job_timeout > 0) |
690 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout)); | |
faf919f1 | 691 | |
ac155bb8 | 692 | condition_dump_list(u->conditions, f, prefix); |
52661efd | 693 | |
ac155bb8 | 694 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
695 | fprintf(f, |
696 | "%s\tCondition Timestamp: %s\n" | |
697 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
698 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
699 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 700 | |
87f0e418 LP |
701 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
702 | Unit *other; | |
703 | ||
ac155bb8 MS |
704 | SET_FOREACH(other, u->dependencies[d], i) |
705 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
706 | } |
707 | ||
7c8fa05c | 708 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
709 | fprintf(f, |
710 | "%s\tRequiresMountsFor:", prefix); | |
711 | ||
712 | STRV_FOREACH(j, u->requires_mounts_for) | |
713 | fprintf(f, " %s", *j); | |
714 | ||
715 | fputs("\n", f); | |
716 | } | |
717 | ||
ac155bb8 | 718 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 LP |
719 | CGroupBonding *b; |
720 | CGroupAttribute *a; | |
721 | ||
b0650475 | 722 | fprintf(f, |
a40eb732 | 723 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
724 | "%s\tRefuseManualStart: %s\n" |
725 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 726 | "%s\tDefaultDependencies: %s\n" |
c8f4d764 | 727 | "%s\tOnFailureIsolate: %s\n" |
7a6000a6 LP |
728 | "%s\tIgnoreOnIsolate: %s\n" |
729 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
730 | prefix, yes_no(u->stop_when_unneeded), |
731 | prefix, yes_no(u->refuse_manual_start), | |
732 | prefix, yes_no(u->refuse_manual_stop), | |
733 | prefix, yes_no(u->default_dependencies), | |
734 | prefix, yes_no(u->on_failure_isolate), | |
735 | prefix, yes_no(u->ignore_on_isolate), | |
736 | prefix, yes_no(u->ignore_on_snapshot)); | |
737 | ||
738 | LIST_FOREACH(by_unit, b, u->cgroup_bondings) | |
23a177ef LP |
739 | fprintf(f, "%s\tControlGroup: %s:%s\n", |
740 | prefix, b->controller, b->path); | |
8e274523 | 741 | |
ac155bb8 | 742 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) { |
d8bbda91 LP |
743 | char *v = NULL; |
744 | ||
745 | if (a->map_callback) | |
746 | a->map_callback(a->controller, a->name, a->value, &v); | |
747 | ||
ab1f0633 | 748 | fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n", |
d8bbda91 LP |
749 | prefix, a->controller, a->name, v ? v : a->value); |
750 | ||
751 | free(v); | |
752 | } | |
ab1f0633 | 753 | |
23a177ef LP |
754 | if (UNIT_VTABLE(u)->dump) |
755 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 756 | |
ac155bb8 | 757 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
758 | fprintf(f, |
759 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
760 | prefix, u->merged_into->id); |
761 | else if (u->load_state == UNIT_ERROR) | |
762 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 763 | |
87f0e418 | 764 | |
ac155bb8 MS |
765 | if (u->job) |
766 | job_dump(u->job, f, prefix2); | |
87f0e418 | 767 | |
e0209d83 MS |
768 | if (u->nop_job) |
769 | job_dump(u->nop_job, f, prefix2); | |
770 | ||
47be870b | 771 | free(p2); |
87f0e418 LP |
772 | } |
773 | ||
774 | /* Common implementation for multiple backends */ | |
e537352b | 775 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
776 | int r; |
777 | ||
778 | assert(u); | |
23a177ef LP |
779 | |
780 | /* Load a .service file */ | |
e537352b | 781 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
782 | return r; |
783 | ||
ac155bb8 | 784 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
785 | return -ENOENT; |
786 | ||
787 | /* Load drop-in directory data */ | |
788 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
789 | return r; | |
790 | ||
791 | return 0; | |
792 | } | |
793 | ||
794 | /* Common implementation for multiple backends */ | |
e537352b | 795 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 796 | int r; |
87f0e418 LP |
797 | |
798 | assert(u); | |
799 | ||
23a177ef LP |
800 | /* Same as unit_load_fragment_and_dropin(), but whether |
801 | * something can be loaded or not doesn't matter. */ | |
802 | ||
803 | /* Load a .service file */ | |
e537352b | 804 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
805 | return r; |
806 | ||
ac155bb8 MS |
807 | if (u->load_state == UNIT_STUB) |
808 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 809 | |
87f0e418 | 810 | /* Load drop-in directory data */ |
23a177ef | 811 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
812 | return r; |
813 | ||
23a177ef | 814 | return 0; |
87f0e418 LP |
815 | } |
816 | ||
bba34eed | 817 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
818 | assert(u); |
819 | assert(target); | |
820 | ||
ac155bb8 | 821 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
822 | return 0; |
823 | ||
35b8ca3a | 824 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 825 | * that loop check below is reliable */ |
ac155bb8 MS |
826 | if (u->load_state != UNIT_LOADED || |
827 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
828 | return 0; |
829 | ||
21256a2b LP |
830 | /* If either side wants no automatic dependencies, then let's |
831 | * skip this */ | |
ac155bb8 MS |
832 | if (!u->default_dependencies || |
833 | !target->default_dependencies) | |
21256a2b LP |
834 | return 0; |
835 | ||
98bc2000 | 836 | /* Don't create loops */ |
ac155bb8 | 837 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
838 | return 0; |
839 | ||
840 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
841 | } | |
842 | ||
843 | static int unit_add_default_dependencies(Unit *u) { | |
21256a2b LP |
844 | static const UnitDependency deps[] = { |
845 | UNIT_REQUIRED_BY, | |
846 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
847 | UNIT_WANTED_BY, | |
848 | UNIT_BOUND_BY | |
849 | }; | |
850 | ||
bba34eed | 851 | Unit *target; |
98bc2000 LP |
852 | Iterator i; |
853 | int r; | |
21256a2b | 854 | unsigned k; |
98bc2000 LP |
855 | |
856 | assert(u); | |
857 | ||
21256a2b | 858 | for (k = 0; k < ELEMENTSOF(deps); k++) |
ac155bb8 | 859 | SET_FOREACH(target, u->dependencies[deps[k]], i) |
21256a2b LP |
860 | if ((r = unit_add_default_target_dependency(u, target)) < 0) |
861 | return r; | |
b81884e7 | 862 | |
98bc2000 LP |
863 | return 0; |
864 | } | |
865 | ||
87f0e418 LP |
866 | int unit_load(Unit *u) { |
867 | int r; | |
868 | ||
869 | assert(u); | |
870 | ||
ac155bb8 MS |
871 | if (u->in_load_queue) { |
872 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
873 | u->in_load_queue = false; | |
87f0e418 LP |
874 | } |
875 | ||
ac155bb8 | 876 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
877 | return -EINVAL; |
878 | ||
ac155bb8 | 879 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
880 | return 0; |
881 | ||
e537352b LP |
882 | if (UNIT_VTABLE(u)->load) |
883 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 884 | goto fail; |
23a177ef | 885 | |
ac155bb8 | 886 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
887 | r = -ENOENT; |
888 | goto fail; | |
889 | } | |
890 | ||
ac155bb8 MS |
891 | if (u->load_state == UNIT_LOADED && |
892 | u->default_dependencies) | |
98bc2000 LP |
893 | if ((r = unit_add_default_dependencies(u)) < 0) |
894 | goto fail; | |
895 | ||
7c8fa05c LP |
896 | if (u->load_state == UNIT_LOADED) { |
897 | r = unit_add_mount_links(u); | |
898 | if (r < 0) | |
899 | return r; | |
900 | } | |
901 | ||
ac155bb8 MS |
902 | if (u->on_failure_isolate && |
903 | set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { | |
f68319bb LP |
904 | |
905 | log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", | |
ac155bb8 | 906 | u->id); |
f68319bb LP |
907 | |
908 | r = -EINVAL; | |
909 | goto fail; | |
910 | } | |
911 | ||
ac155bb8 | 912 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
913 | |
914 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 915 | unit_add_to_gc_queue(u); |
87f0e418 | 916 | |
87f0e418 LP |
917 | return 0; |
918 | ||
919 | fail: | |
ac155bb8 MS |
920 | u->load_state = UNIT_ERROR; |
921 | u->load_error = r; | |
c1e1601e | 922 | unit_add_to_dbus_queue(u); |
9a46fc3b | 923 | unit_add_to_gc_queue(u); |
23a177ef | 924 | |
ac155bb8 | 925 | log_debug("Failed to load configuration for %s: %s", u->id, strerror(-r)); |
23a177ef | 926 | |
87f0e418 LP |
927 | return r; |
928 | } | |
929 | ||
90bbc946 LP |
930 | bool unit_condition_test(Unit *u) { |
931 | assert(u); | |
932 | ||
ac155bb8 MS |
933 | dual_timestamp_get(&u->condition_timestamp); |
934 | u->condition_result = condition_test_list(u->conditions); | |
90bbc946 | 935 | |
ac155bb8 | 936 | return u->condition_result; |
90bbc946 LP |
937 | } |
938 | ||
c6918296 MS |
939 | static void unit_status_print_starting_stopping(Unit *u, bool stopping) { |
940 | const UnitStatusMessageFormats *format_table; | |
941 | const char *format; | |
942 | ||
943 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
944 | if (!format_table) | |
945 | return; | |
946 | ||
947 | format = format_table->starting_stopping[stopping]; | |
948 | if (!format) | |
949 | return; | |
950 | ||
951 | unit_status_printf(u, "", format, unit_description(u)); | |
952 | } | |
953 | ||
87f0e418 | 954 | /* Errors: |
d5159713 LP |
955 | * -EBADR: This unit type does not support starting. |
956 | * -EALREADY: Unit is already started. | |
957 | * -EAGAIN: An operation is already in progress. Retry later. | |
958 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
959 | */ |
960 | int unit_start(Unit *u) { | |
961 | UnitActiveState state; | |
92ab323c | 962 | Unit *following; |
87f0e418 LP |
963 | |
964 | assert(u); | |
965 | ||
ac155bb8 | 966 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
967 | return -EINVAL; |
968 | ||
a82e5507 LP |
969 | /* If this is already started, then this will succeed. Note |
970 | * that this will even succeed if this unit is not startable | |
971 | * by the user. This is relied on to detect when we need to | |
972 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
973 | state = unit_active_state(u); |
974 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
975 | return -EALREADY; | |
976 | ||
a82e5507 LP |
977 | /* If the conditions failed, don't do anything at all. If we |
978 | * already are activating this call might still be useful to | |
979 | * speed up activation in case there is some hold-off time, | |
980 | * but we don't want to recheck the condition in that case. */ | |
981 | if (state != UNIT_ACTIVATING && | |
982 | !unit_condition_test(u)) { | |
ac155bb8 | 983 | log_debug("Starting of %s requested but condition failed. Ignoring.", u->id); |
52661efd LP |
984 | return -EALREADY; |
985 | } | |
986 | ||
92ab323c LP |
987 | /* Forward to the main object, if we aren't it. */ |
988 | if ((following = unit_following(u))) { | |
ac155bb8 | 989 | log_debug("Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
990 | return unit_start(following); |
991 | } | |
992 | ||
c6918296 MS |
993 | unit_status_print_starting_stopping(u, false); |
994 | ||
92ab323c LP |
995 | /* If it is stopped, but we cannot start it, then fail */ |
996 | if (!UNIT_VTABLE(u)->start) | |
997 | return -EBADR; | |
998 | ||
87f0e418 LP |
999 | /* We don't suppress calls to ->start() here when we are |
1000 | * already starting, to allow this request to be used as a | |
1001 | * "hurry up" call, for example when the unit is in some "auto | |
1002 | * restart" state where it waits for a holdoff timer to elapse | |
1003 | * before it will start again. */ | |
1004 | ||
c1e1601e | 1005 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1006 | |
87f0e418 LP |
1007 | return UNIT_VTABLE(u)->start(u); |
1008 | } | |
1009 | ||
1010 | bool unit_can_start(Unit *u) { | |
1011 | assert(u); | |
1012 | ||
1013 | return !!UNIT_VTABLE(u)->start; | |
1014 | } | |
1015 | ||
2528a7a6 LP |
1016 | bool unit_can_isolate(Unit *u) { |
1017 | assert(u); | |
1018 | ||
1019 | return unit_can_start(u) && | |
ac155bb8 | 1020 | u->allow_isolate; |
2528a7a6 LP |
1021 | } |
1022 | ||
87f0e418 LP |
1023 | /* Errors: |
1024 | * -EBADR: This unit type does not support stopping. | |
1025 | * -EALREADY: Unit is already stopped. | |
1026 | * -EAGAIN: An operation is already in progress. Retry later. | |
1027 | */ | |
1028 | int unit_stop(Unit *u) { | |
1029 | UnitActiveState state; | |
92ab323c | 1030 | Unit *following; |
87f0e418 LP |
1031 | |
1032 | assert(u); | |
1033 | ||
87f0e418 | 1034 | state = unit_active_state(u); |
fdf20a31 | 1035 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1036 | return -EALREADY; |
1037 | ||
92ab323c | 1038 | if ((following = unit_following(u))) { |
ac155bb8 | 1039 | log_debug("Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1040 | return unit_stop(following); |
1041 | } | |
1042 | ||
c6918296 MS |
1043 | unit_status_print_starting_stopping(u, true); |
1044 | ||
7898b0cf LP |
1045 | if (!UNIT_VTABLE(u)->stop) |
1046 | return -EBADR; | |
1047 | ||
c1e1601e | 1048 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1049 | |
87f0e418 LP |
1050 | return UNIT_VTABLE(u)->stop(u); |
1051 | } | |
1052 | ||
1053 | /* Errors: | |
1054 | * -EBADR: This unit type does not support reloading. | |
1055 | * -ENOEXEC: Unit is not started. | |
1056 | * -EAGAIN: An operation is already in progress. Retry later. | |
1057 | */ | |
1058 | int unit_reload(Unit *u) { | |
1059 | UnitActiveState state; | |
92ab323c | 1060 | Unit *following; |
87f0e418 LP |
1061 | |
1062 | assert(u); | |
1063 | ||
ac155bb8 | 1064 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1065 | return -EINVAL; |
1066 | ||
87f0e418 LP |
1067 | if (!unit_can_reload(u)) |
1068 | return -EBADR; | |
1069 | ||
1070 | state = unit_active_state(u); | |
e364ad06 | 1071 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1072 | return -EALREADY; |
1073 | ||
e364ad06 | 1074 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
1075 | return -ENOEXEC; |
1076 | ||
92ab323c | 1077 | if ((following = unit_following(u))) { |
ac155bb8 | 1078 | log_debug("Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1079 | return unit_reload(following); |
1080 | } | |
1081 | ||
c1e1601e | 1082 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1083 | return UNIT_VTABLE(u)->reload(u); |
1084 | } | |
1085 | ||
1086 | bool unit_can_reload(Unit *u) { | |
1087 | assert(u); | |
1088 | ||
1089 | if (!UNIT_VTABLE(u)->reload) | |
1090 | return false; | |
1091 | ||
1092 | if (!UNIT_VTABLE(u)->can_reload) | |
1093 | return true; | |
1094 | ||
1095 | return UNIT_VTABLE(u)->can_reload(u); | |
1096 | } | |
1097 | ||
b4a16b7b | 1098 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1099 | Iterator i; |
1100 | Unit *other; | |
1101 | ||
1102 | assert(u); | |
1103 | ||
1104 | /* If this service shall be shut down when unneeded then do | |
1105 | * so. */ | |
1106 | ||
ac155bb8 | 1107 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1108 | return; |
1109 | ||
1110 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1111 | return; | |
1112 | ||
ac155bb8 | 1113 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
f60c2665 | 1114 | if (unit_pending_active(other)) |
f3bff0eb LP |
1115 | return; |
1116 | ||
ac155bb8 | 1117 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f60c2665 | 1118 | if (unit_pending_active(other)) |
f3bff0eb LP |
1119 | return; |
1120 | ||
ac155bb8 | 1121 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
f60c2665 | 1122 | if (unit_pending_active(other)) |
f3bff0eb LP |
1123 | return; |
1124 | ||
ac155bb8 | 1125 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
f60c2665 | 1126 | if (unit_pending_active(other)) |
b81884e7 LP |
1127 | return; |
1128 | ||
ac155bb8 | 1129 | log_info("Service %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1130 | |
1131 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1132 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1133 | } |
1134 | ||
87f0e418 LP |
1135 | static void retroactively_start_dependencies(Unit *u) { |
1136 | Iterator i; | |
1137 | Unit *other; | |
1138 | ||
1139 | assert(u); | |
1140 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1141 | ||
ac155bb8 MS |
1142 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1143 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1144 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1145 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1146 | |
7f2cddae | 1147 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1148 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1149 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1150 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1151 | |
ac155bb8 MS |
1152 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1153 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1154 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1155 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1156 | |
ac155bb8 MS |
1157 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
1158 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1159 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1160 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1161 | |
ac155bb8 MS |
1162 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1163 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1164 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1165 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1166 | |
ac155bb8 | 1167 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1168 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1169 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1170 | |
ac155bb8 | 1171 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1172 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1173 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1174 | } |
1175 | ||
1176 | static void retroactively_stop_dependencies(Unit *u) { | |
1177 | Iterator i; | |
1178 | Unit *other; | |
1179 | ||
1180 | assert(u); | |
1181 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1182 | ||
b81884e7 | 1183 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1184 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1185 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1186 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1187 | } |
1188 | ||
1189 | static void check_unneeded_dependencies(Unit *u) { | |
1190 | Iterator i; | |
1191 | Unit *other; | |
1192 | ||
1193 | assert(u); | |
1194 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1195 | |
1196 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1197 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1198 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1199 | unit_check_unneeded(other); |
ac155bb8 | 1200 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1201 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1202 | unit_check_unneeded(other); |
ac155bb8 | 1203 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1204 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1205 | unit_check_unneeded(other); |
ac155bb8 | 1206 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1207 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1208 | unit_check_unneeded(other); |
ac155bb8 | 1209 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1210 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1211 | unit_check_unneeded(other); |
7f2cddae | 1212 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1213 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1214 | unit_check_unneeded(other); | |
87f0e418 LP |
1215 | } |
1216 | ||
c0daa706 LP |
1217 | void unit_trigger_on_failure(Unit *u) { |
1218 | Unit *other; | |
1219 | Iterator i; | |
1220 | ||
1221 | assert(u); | |
1222 | ||
ac155bb8 | 1223 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1224 | return; |
1225 | ||
ac155bb8 | 1226 | log_info("Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1227 | |
ac155bb8 | 1228 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1229 | int r; |
1230 | ||
ac155bb8 | 1231 | if ((r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0) |
222ae6a8 LP |
1232 | log_error("Failed to enqueue OnFailure= job: %s", strerror(-r)); |
1233 | } | |
c0daa706 LP |
1234 | } |
1235 | ||
e2f3b44c | 1236 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
7e6e7b06 | 1237 | bool unexpected; |
a096ed36 | 1238 | |
87f0e418 LP |
1239 | assert(u); |
1240 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1241 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1242 | |
8e471ccd LP |
1243 | /* Note that this is called for all low-level state changes, |
1244 | * even if they might map to the same high-level | |
1245 | * UnitActiveState! That means that ns == os is OK an expected | |
1246 | * behaviour here. For example: if a mount point is remounted | |
cd6d0a45 | 1247 | * this function will be called too! */ |
87f0e418 | 1248 | |
ac155bb8 | 1249 | if (u->manager->n_reloading <= 0) { |
bdbf9951 | 1250 | dual_timestamp ts; |
173e3821 | 1251 | |
bdbf9951 | 1252 | dual_timestamp_get(&ts); |
173e3821 | 1253 | |
bdbf9951 | 1254 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1255 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1256 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1257 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1258 | |
1259 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1260 | u->active_enter_timestamp = ts; |
bdbf9951 | 1261 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1262 | u->active_exit_timestamp = ts; |
bdbf9951 LP |
1263 | |
1264 | timer_unit_notify(u, ns); | |
1265 | path_unit_notify(u, ns); | |
1266 | } | |
87f0e418 | 1267 | |
fdf20a31 | 1268 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1269 | cgroup_bonding_trim_list(u->cgroup_bondings, true); |
fb385181 | 1270 | |
ac155bb8 | 1271 | if (u->job) { |
7e6e7b06 | 1272 | unexpected = false; |
87f0e418 | 1273 | |
ac155bb8 | 1274 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1275 | |
1276 | /* So we reached a different state for this | |
1277 | * job. Let's see if we can run it now if it | |
1278 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1279 | job_add_to_run_queue(u->job); |
87f0e418 | 1280 | |
b410e6b9 | 1281 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1282 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1283 | * hence needs to invalidate jobs. */ |
87f0e418 | 1284 | |
ac155bb8 | 1285 | switch (u->job->type) { |
87f0e418 | 1286 | |
b410e6b9 LP |
1287 | case JOB_START: |
1288 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1289 | |
b410e6b9 | 1290 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1291 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1292 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1293 | unexpected = true; |
41b02ec7 | 1294 | |
fdf20a31 | 1295 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1296 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1297 | } |
87f0e418 | 1298 | |
b410e6b9 | 1299 | break; |
87f0e418 | 1300 | |
b410e6b9 LP |
1301 | case JOB_RELOAD: |
1302 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1303 | |
ac155bb8 | 1304 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1305 | if (ns == UNIT_ACTIVE) |
5273510e | 1306 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1307 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1308 | unexpected = true; |
41b02ec7 | 1309 | |
fdf20a31 | 1310 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1311 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1312 | } |
b410e6b9 | 1313 | } |
87f0e418 | 1314 | |
b410e6b9 | 1315 | break; |
87f0e418 | 1316 | |
b410e6b9 LP |
1317 | case JOB_STOP: |
1318 | case JOB_RESTART: | |
1319 | case JOB_TRY_RESTART: | |
87f0e418 | 1320 | |
fdf20a31 | 1321 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1322 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1323 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1324 | unexpected = true; |
5273510e | 1325 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1326 | } |
87f0e418 | 1327 | |
b410e6b9 | 1328 | break; |
87f0e418 | 1329 | |
b410e6b9 LP |
1330 | default: |
1331 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1332 | } |
87f0e418 | 1333 | |
7e6e7b06 LP |
1334 | } else |
1335 | unexpected = true; | |
1336 | ||
ac155bb8 | 1337 | if (u->manager->n_reloading <= 0) { |
f3bff0eb | 1338 | |
bdbf9951 LP |
1339 | /* If this state change happened without being |
1340 | * requested by a job, then let's retroactively start | |
1341 | * or stop dependencies. We skip that step when | |
1342 | * deserializing, since we don't want to create any | |
1343 | * additional jobs just because something is already | |
1344 | * activated. */ | |
1345 | ||
1346 | if (unexpected) { | |
1347 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1348 | retroactively_start_dependencies(u); | |
1349 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1350 | retroactively_stop_dependencies(u); | |
1351 | } | |
5de9682c | 1352 | |
cd0504d0 MS |
1353 | /* stop unneeded units regardless if going down was expected or not */ |
1354 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1355 | check_unneeded_dependencies(u); | |
1356 | ||
bdbf9951 | 1357 | if (ns != os && ns == UNIT_FAILED) { |
ac155bb8 | 1358 | log_notice("Unit %s entered failed state.", u->id); |
bdbf9951 | 1359 | unit_trigger_on_failure(u); |
cd6d0a45 | 1360 | } |
3b2775c5 | 1361 | } |
e537352b | 1362 | |
3b2775c5 LP |
1363 | /* Some names are special */ |
1364 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1365 | ||
1366 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1367 | /* The bus just might have become available, | |
1368 | * hence try to connect to it, if we aren't | |
1369 | * yet connected. */ | |
ac155bb8 | 1370 | bus_init(u->manager, true); |
3b2775c5 | 1371 | |
ac155bb8 | 1372 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1373 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
ac155bb8 | 1374 | u->manager->n_reloading <= 0) { |
3b2775c5 | 1375 | /* Write audit record if we have just finished starting up */ |
ac155bb8 MS |
1376 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); |
1377 | u->in_audit = true; | |
3b2775c5 | 1378 | } |
e983b760 | 1379 | |
3b2775c5 | 1380 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
ac155bb8 | 1381 | manager_send_unit_plymouth(u->manager, u); |
bdbf9951 | 1382 | |
3b2775c5 | 1383 | } else { |
bdbf9951 | 1384 | |
3b2775c5 LP |
1385 | /* We don't care about D-Bus here, since we'll get an |
1386 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1387 | |
ac155bb8 | 1388 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1389 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1390 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
ac155bb8 | 1391 | u->manager->n_reloading <= 0) { |
4927fcae | 1392 | |
3b2775c5 LP |
1393 | /* Hmm, if there was no start record written |
1394 | * write it now, so that we always have a nice | |
1395 | * pair */ | |
ac155bb8 MS |
1396 | if (!u->in_audit) { |
1397 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 1398 | |
3b2775c5 | 1399 | if (ns == UNIT_INACTIVE) |
ac155bb8 | 1400 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1401 | } else |
1402 | /* Write audit record if we have just finished shutting down */ | |
ac155bb8 | 1403 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1404 | |
ac155bb8 | 1405 | u->in_audit = false; |
cd6d0a45 | 1406 | } |
f278026d LP |
1407 | } |
1408 | ||
ac155bb8 | 1409 | manager_recheck_journal(u->manager); |
3b2775c5 | 1410 | |
f3bff0eb LP |
1411 | /* Maybe we finished startup and are now ready for being |
1412 | * stopped because unneeded? */ | |
b4a16b7b | 1413 | unit_check_unneeded(u); |
c1e1601e LP |
1414 | |
1415 | unit_add_to_dbus_queue(u); | |
701cc384 | 1416 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1417 | } |
1418 | ||
acbb0225 | 1419 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1420 | struct epoll_event ev; |
1421 | ||
1422 | assert(u); | |
1423 | assert(fd >= 0); | |
acbb0225 | 1424 | assert(w); |
ea430986 | 1425 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1426 | |
1427 | zero(ev); | |
acbb0225 | 1428 | ev.data.ptr = w; |
87f0e418 LP |
1429 | ev.events = events; |
1430 | ||
ac155bb8 | 1431 | if (epoll_ctl(u->manager->epoll_fd, |
acbb0225 LP |
1432 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, |
1433 | fd, | |
1434 | &ev) < 0) | |
1435 | return -errno; | |
87f0e418 | 1436 | |
acbb0225 LP |
1437 | w->fd = fd; |
1438 | w->type = WATCH_FD; | |
ea430986 | 1439 | w->data.unit = u; |
87f0e418 | 1440 | |
acbb0225 | 1441 | return 0; |
87f0e418 LP |
1442 | } |
1443 | ||
acbb0225 | 1444 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1445 | assert(u); |
acbb0225 | 1446 | assert(w); |
87f0e418 | 1447 | |
acbb0225 LP |
1448 | if (w->type == WATCH_INVALID) |
1449 | return; | |
1450 | ||
ea430986 LP |
1451 | assert(w->type == WATCH_FD); |
1452 | assert(w->data.unit == u); | |
ac155bb8 | 1453 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
acbb0225 LP |
1454 | |
1455 | w->fd = -1; | |
1456 | w->type = WATCH_INVALID; | |
ea430986 | 1457 | w->data.unit = NULL; |
87f0e418 LP |
1458 | } |
1459 | ||
1460 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1461 | assert(u); | |
1462 | assert(pid >= 1); | |
1463 | ||
05e343b7 LP |
1464 | /* Watch a specific PID. We only support one unit watching |
1465 | * each PID for now. */ | |
1466 | ||
ac155bb8 | 1467 | return hashmap_put(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1468 | } |
1469 | ||
1470 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1471 | assert(u); | |
1472 | assert(pid >= 1); | |
1473 | ||
ac155bb8 | 1474 | hashmap_remove_value(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1475 | } |
1476 | ||
acbb0225 | 1477 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1478 | struct itimerspec its; |
acbb0225 | 1479 | int flags, fd; |
87f0e418 LP |
1480 | bool ours; |
1481 | ||
1482 | assert(u); | |
acbb0225 | 1483 | assert(w); |
faf919f1 | 1484 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1485 | |
1486 | /* This will try to reuse the old timer if there is one */ | |
1487 | ||
faf919f1 LP |
1488 | if (w->type == WATCH_UNIT_TIMER) { |
1489 | assert(w->data.unit == u); | |
1490 | assert(w->fd >= 0); | |
1491 | ||
87f0e418 | 1492 | ours = false; |
acbb0225 | 1493 | fd = w->fd; |
faf919f1 LP |
1494 | } else if (w->type == WATCH_INVALID) { |
1495 | ||
87f0e418 | 1496 | ours = true; |
87f0e418 LP |
1497 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1498 | return -errno; | |
faf919f1 LP |
1499 | } else |
1500 | assert_not_reached("Invalid watch type"); | |
87f0e418 LP |
1501 | |
1502 | zero(its); | |
1503 | ||
1504 | if (delay <= 0) { | |
1505 | /* Set absolute time in the past, but not 0, since we | |
1506 | * don't want to disarm the timer */ | |
1507 | its.it_value.tv_sec = 0; | |
1508 | its.it_value.tv_nsec = 1; | |
1509 | ||
1510 | flags = TFD_TIMER_ABSTIME; | |
1511 | } else { | |
1512 | timespec_store(&its.it_value, delay); | |
1513 | flags = 0; | |
1514 | } | |
1515 | ||
1516 | /* This will also flush the elapse counter */ | |
1517 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1518 | goto fail; | |
1519 | ||
acbb0225 LP |
1520 | if (w->type == WATCH_INVALID) { |
1521 | struct epoll_event ev; | |
87f0e418 | 1522 | |
acbb0225 LP |
1523 | zero(ev); |
1524 | ev.data.ptr = w; | |
f94ea366 | 1525 | ev.events = EPOLLIN; |
acbb0225 | 1526 | |
ac155bb8 | 1527 | if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) |
acbb0225 LP |
1528 | goto fail; |
1529 | } | |
1530 | ||
faf919f1 | 1531 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1532 | w->fd = fd; |
ea430986 | 1533 | w->data.unit = u; |
87f0e418 | 1534 | |
87f0e418 LP |
1535 | return 0; |
1536 | ||
1537 | fail: | |
1538 | if (ours) | |
ea430986 | 1539 | close_nointr_nofail(fd); |
87f0e418 LP |
1540 | |
1541 | return -errno; | |
1542 | } | |
1543 | ||
acbb0225 | 1544 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1545 | assert(u); |
acbb0225 | 1546 | assert(w); |
87f0e418 | 1547 | |
acbb0225 | 1548 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1549 | return; |
1550 | ||
faf919f1 LP |
1551 | assert(w->type == WATCH_UNIT_TIMER); |
1552 | assert(w->data.unit == u); | |
1553 | assert(w->fd >= 0); | |
acbb0225 | 1554 | |
ac155bb8 | 1555 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
a16e1123 | 1556 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1557 | |
1558 | w->fd = -1; | |
1559 | w->type = WATCH_INVALID; | |
ea430986 | 1560 | w->data.unit = NULL; |
87f0e418 LP |
1561 | } |
1562 | ||
1563 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1564 | assert(u); | |
1565 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1566 | ||
1567 | switch (j) { | |
1568 | ||
1569 | case JOB_VERIFY_ACTIVE: | |
1570 | case JOB_START: | |
57339f47 | 1571 | case JOB_STOP: |
e0209d83 | 1572 | case JOB_NOP: |
87f0e418 LP |
1573 | return true; |
1574 | ||
87f0e418 LP |
1575 | case JOB_RESTART: |
1576 | case JOB_TRY_RESTART: | |
1577 | return unit_can_start(u); | |
1578 | ||
1579 | case JOB_RELOAD: | |
1580 | return unit_can_reload(u); | |
1581 | ||
1582 | case JOB_RELOAD_OR_START: | |
1583 | return unit_can_reload(u) && unit_can_start(u); | |
1584 | ||
1585 | default: | |
1586 | assert_not_reached("Invalid job type"); | |
1587 | } | |
1588 | } | |
1589 | ||
701cc384 | 1590 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1591 | |
1592 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1593 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1594 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1595 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1596 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1597 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 1598 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 1599 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 1600 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1601 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1602 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 1603 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 1604 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
1605 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1606 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1607 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1608 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1609 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 1610 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
1611 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
1612 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 1613 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 1614 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 1615 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
87f0e418 | 1616 | }; |
701cc384 | 1617 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1618 | |
1619 | assert(u); | |
1620 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1621 | assert(other); |
1622 | ||
9f151f29 LP |
1623 | u = unit_follow_merge(u); |
1624 | other = unit_follow_merge(other); | |
1625 | ||
87f0e418 LP |
1626 | /* We won't allow dependencies on ourselves. We will not |
1627 | * consider them an error however. */ | |
1628 | if (u == other) | |
1629 | return 0; | |
1630 | ||
ac155bb8 | 1631 | if ((r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1632 | return r; |
1633 | ||
5de9682c | 1634 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1635 | if ((r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) |
5de9682c LP |
1636 | return r; |
1637 | ||
701cc384 | 1638 | if (add_reference) |
ac155bb8 MS |
1639 | if ((r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || |
1640 | (r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
701cc384 | 1641 | return r; |
87f0e418 | 1642 | |
ac155bb8 | 1643 | if ((q = set_put(u->dependencies[d], other)) < 0) |
701cc384 | 1644 | return q; |
87f0e418 | 1645 | |
5de9682c | 1646 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1647 | if ((v = set_put(other->dependencies[inverse_table[d]], u)) < 0) { |
5de9682c LP |
1648 | r = v; |
1649 | goto fail; | |
1650 | } | |
701cc384 LP |
1651 | |
1652 | if (add_reference) { | |
ac155bb8 | 1653 | if ((w = set_put(u->dependencies[UNIT_REFERENCES], other)) < 0) { |
701cc384 LP |
1654 | r = w; |
1655 | goto fail; | |
1656 | } | |
1657 | ||
ac155bb8 | 1658 | if ((r = set_put(other->dependencies[UNIT_REFERENCED_BY], u)) < 0) |
701cc384 | 1659 | goto fail; |
87f0e418 LP |
1660 | } |
1661 | ||
c1e1601e | 1662 | unit_add_to_dbus_queue(u); |
87f0e418 | 1663 | return 0; |
701cc384 LP |
1664 | |
1665 | fail: | |
1666 | if (q > 0) | |
ac155bb8 | 1667 | set_remove(u->dependencies[d], other); |
701cc384 LP |
1668 | |
1669 | if (v > 0) | |
ac155bb8 | 1670 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
1671 | |
1672 | if (w > 0) | |
ac155bb8 | 1673 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
1674 | |
1675 | return r; | |
87f0e418 | 1676 | } |
0301abf4 | 1677 | |
2c966c03 LP |
1678 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1679 | int r; | |
1680 | ||
1681 | assert(u); | |
1682 | ||
1683 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1684 | return r; | |
1685 | ||
1686 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1687 | return r; | |
1688 | ||
1689 | return 0; | |
1690 | } | |
1691 | ||
9e2f7c11 LP |
1692 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1693 | char *s; | |
1694 | ||
1695 | assert(u); | |
1696 | assert(name || path); | |
1697 | ||
1698 | if (!name) | |
9eb977db | 1699 | name = path_get_file_name(path); |
9e2f7c11 LP |
1700 | |
1701 | if (!unit_name_is_template(name)) { | |
1702 | *p = NULL; | |
1703 | return name; | |
1704 | } | |
1705 | ||
ac155bb8 MS |
1706 | if (u->instance) |
1707 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 LP |
1708 | else { |
1709 | char *i; | |
1710 | ||
ac155bb8 | 1711 | if (!(i = unit_name_to_prefix(u->id))) |
9e2f7c11 LP |
1712 | return NULL; |
1713 | ||
1714 | s = unit_name_replace_instance(name, i); | |
1715 | free(i); | |
1716 | } | |
1717 | ||
1718 | if (!s) | |
1719 | return NULL; | |
1720 | ||
1721 | *p = s; | |
1722 | return s; | |
1723 | } | |
1724 | ||
701cc384 | 1725 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1726 | Unit *other; |
1727 | int r; | |
9e2f7c11 | 1728 | char *s; |
09b6b09f | 1729 | |
9e2f7c11 LP |
1730 | assert(u); |
1731 | assert(name || path); | |
09b6b09f | 1732 | |
9e2f7c11 LP |
1733 | if (!(name = resolve_template(u, name, path, &s))) |
1734 | return -ENOMEM; | |
09b6b09f | 1735 | |
ac155bb8 | 1736 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1737 | goto finish; |
1738 | ||
701cc384 | 1739 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1740 | |
1741 | finish: | |
1742 | free(s); | |
1743 | return r; | |
09b6b09f LP |
1744 | } |
1745 | ||
2c966c03 LP |
1746 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1747 | Unit *other; | |
1748 | int r; | |
1749 | char *s; | |
1750 | ||
1751 | assert(u); | |
1752 | assert(name || path); | |
1753 | ||
1754 | if (!(name = resolve_template(u, name, path, &s))) | |
1755 | return -ENOMEM; | |
1756 | ||
ac155bb8 | 1757 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1758 | goto finish; |
1759 | ||
1760 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1761 | ||
1762 | finish: | |
1763 | free(s); | |
1764 | return r; | |
1765 | } | |
1766 | ||
701cc384 | 1767 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1768 | Unit *other; |
1769 | int r; | |
9e2f7c11 | 1770 | char *s; |
bd77d0fc | 1771 | |
9e2f7c11 LP |
1772 | assert(u); |
1773 | assert(name || path); | |
bd77d0fc | 1774 | |
9e2f7c11 LP |
1775 | if (!(name = resolve_template(u, name, path, &s))) |
1776 | return -ENOMEM; | |
bd77d0fc | 1777 | |
ac155bb8 | 1778 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1779 | goto finish; |
1780 | ||
701cc384 | 1781 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1782 | |
1783 | finish: | |
1784 | free(s); | |
1785 | return r; | |
bd77d0fc LP |
1786 | } |
1787 | ||
2c966c03 LP |
1788 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1789 | Unit *other; | |
1790 | int r; | |
1791 | char *s; | |
1792 | ||
1793 | assert(u); | |
1794 | assert(name || path); | |
1795 | ||
1796 | if (!(name = resolve_template(u, name, path, &s))) | |
1797 | return -ENOMEM; | |
1798 | ||
ac155bb8 | 1799 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1800 | goto finish; |
1801 | ||
1802 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1803 | goto finish; | |
1804 | ||
1805 | finish: | |
1806 | free(s); | |
1807 | return r; | |
1808 | } | |
1809 | ||
0301abf4 LP |
1810 | int set_unit_path(const char *p) { |
1811 | char *cwd, *c; | |
1812 | int r; | |
1813 | ||
1814 | /* This is mostly for debug purposes */ | |
1815 | ||
1816 | if (path_is_absolute(p)) { | |
1817 | if (!(c = strdup(p))) | |
1818 | return -ENOMEM; | |
1819 | } else { | |
1820 | if (!(cwd = get_current_dir_name())) | |
1821 | return -errno; | |
1822 | ||
1823 | r = asprintf(&c, "%s/%s", cwd, p); | |
1824 | free(cwd); | |
1825 | ||
1826 | if (r < 0) | |
1827 | return -ENOMEM; | |
1828 | } | |
1829 | ||
036643a2 | 1830 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1831 | r = -errno; |
1832 | free(c); | |
1833 | return r; | |
1834 | } | |
1835 | ||
1836 | return 0; | |
1837 | } | |
88066b3a | 1838 | |
ea430986 | 1839 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
1840 | assert(u); |
1841 | ||
ac155bb8 | 1842 | if (!u->id) |
04ade7d2 LP |
1843 | return NULL; |
1844 | ||
48899192 | 1845 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
1846 | } |
1847 | ||
8e274523 | 1848 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
8e274523 LP |
1849 | int r; |
1850 | ||
1851 | assert(u); | |
1852 | assert(b); | |
35d2e7ec | 1853 | |
8e274523 LP |
1854 | assert(b->path); |
1855 | ||
e025b4c3 | 1856 | if (!b->controller) { |
35d2e7ec LP |
1857 | if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) |
1858 | return -ENOMEM; | |
1859 | ||
e025b4c3 LP |
1860 | b->ours = true; |
1861 | } | |
1862 | ||
8e274523 LP |
1863 | /* Ensure this hasn't been added yet */ |
1864 | assert(!b->unit); | |
1865 | ||
d686d8a9 LP |
1866 | if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
1867 | CGroupBonding *l; | |
8e274523 | 1868 | |
ac155bb8 | 1869 | l = hashmap_get(u->manager->cgroup_bondings, b->path); |
d686d8a9 LP |
1870 | LIST_PREPEND(CGroupBonding, by_path, l, b); |
1871 | ||
ac155bb8 | 1872 | if ((r = hashmap_replace(u->manager->cgroup_bondings, b->path, l)) < 0) { |
d686d8a9 LP |
1873 | LIST_REMOVE(CGroupBonding, by_path, l, b); |
1874 | return r; | |
1875 | } | |
8e274523 LP |
1876 | } |
1877 | ||
ac155bb8 | 1878 | LIST_PREPEND(CGroupBonding, by_unit, u->cgroup_bondings, b); |
8e274523 LP |
1879 | b->unit = u; |
1880 | ||
1881 | return 0; | |
1882 | } | |
1883 | ||
013b87c0 LP |
1884 | static char *default_cgroup_path(Unit *u) { |
1885 | char *p; | |
1886 | ||
1887 | assert(u); | |
1888 | ||
ac155bb8 | 1889 | if (u->instance) { |
4f2d528d | 1890 | char *t; |
013b87c0 | 1891 | |
ac155bb8 | 1892 | t = unit_name_template(u->id); |
cd0ed1db | 1893 | if (!t) |
4f2d528d LP |
1894 | return NULL; |
1895 | ||
b7def684 | 1896 | p = strjoin(u->manager->cgroup_hierarchy, "/", t, "/", u->instance, NULL); |
4f2d528d LP |
1897 | free(t); |
1898 | } else | |
b7def684 | 1899 | p = strjoin(u->manager->cgroup_hierarchy, "/", u->id, NULL); |
4f2d528d | 1900 | |
cd0ed1db | 1901 | return p; |
013b87c0 LP |
1902 | } |
1903 | ||
8e274523 | 1904 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
013b87c0 LP |
1905 | char *controller = NULL, *path = NULL; |
1906 | CGroupBonding *b = NULL; | |
e025b4c3 | 1907 | bool ours = false; |
8e274523 LP |
1908 | int r; |
1909 | ||
1910 | assert(u); | |
1911 | assert(name); | |
1912 | ||
35d2e7ec LP |
1913 | if ((r = cg_split_spec(name, &controller, &path)) < 0) |
1914 | return r; | |
8e274523 | 1915 | |
e025b4c3 | 1916 | if (!path) { |
35d2e7ec | 1917 | path = default_cgroup_path(u); |
e025b4c3 LP |
1918 | ours = true; |
1919 | } | |
013b87c0 | 1920 | |
e025b4c3 | 1921 | if (!controller) { |
55096547 | 1922 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
e025b4c3 LP |
1923 | ours = true; |
1924 | } | |
013b87c0 | 1925 | |
35d2e7ec LP |
1926 | if (!path || !controller) { |
1927 | free(path); | |
1928 | free(controller); | |
1929 | ||
1930 | return -ENOMEM; | |
8e274523 LP |
1931 | } |
1932 | ||
ac155bb8 | 1933 | if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) { |
013b87c0 LP |
1934 | r = -EEXIST; |
1935 | goto fail; | |
1936 | } | |
8e274523 | 1937 | |
013b87c0 | 1938 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1939 | r = -ENOMEM; |
1940 | goto fail; | |
1941 | } | |
1942 | ||
013b87c0 LP |
1943 | b->controller = controller; |
1944 | b->path = path; | |
e025b4c3 LP |
1945 | b->ours = ours; |
1946 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
8e274523 LP |
1947 | |
1948 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1949 | goto fail; | |
1950 | ||
1951 | return 0; | |
1952 | ||
1953 | fail: | |
013b87c0 LP |
1954 | free(path); |
1955 | free(controller); | |
8e274523 LP |
1956 | free(b); |
1957 | ||
1958 | return r; | |
1959 | } | |
1960 | ||
06d4c99a | 1961 | static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
d686d8a9 | 1962 | CGroupBonding *b = NULL; |
8e274523 LP |
1963 | int r = -ENOMEM; |
1964 | ||
1965 | assert(u); | |
1966 | ||
06d4c99a LP |
1967 | if (!controller) |
1968 | controller = SYSTEMD_CGROUP_CONTROLLER; | |
8e274523 | 1969 | |
ac155bb8 | 1970 | if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) |
06d4c99a | 1971 | return 0; |
8e274523 | 1972 | |
06d4c99a LP |
1973 | if (!(b = new0(CGroupBonding, 1))) |
1974 | return -ENOMEM; | |
8e274523 | 1975 | |
06d4c99a LP |
1976 | if (!(b->controller = strdup(controller))) |
1977 | goto fail; | |
d686d8a9 | 1978 | |
06d4c99a LP |
1979 | if (!(b->path = default_cgroup_path(u))) |
1980 | goto fail; | |
d686d8a9 | 1981 | |
06d4c99a LP |
1982 | b->ours = true; |
1983 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
d686d8a9 | 1984 | |
06d4c99a LP |
1985 | if ((r = unit_add_cgroup(u, b)) < 0) |
1986 | goto fail; | |
8e274523 LP |
1987 | |
1988 | return 0; | |
1989 | ||
1990 | fail: | |
06d4c99a LP |
1991 | free(b->path); |
1992 | free(b->controller); | |
1993 | free(b); | |
8e274523 LP |
1994 | |
1995 | return r; | |
1996 | } | |
1997 | ||
06d4c99a | 1998 | int unit_add_default_cgroups(Unit *u) { |
ab1f0633 | 1999 | CGroupAttribute *a; |
06d4c99a LP |
2000 | char **c; |
2001 | int r; | |
ab1f0633 | 2002 | |
06d4c99a LP |
2003 | assert(u); |
2004 | ||
2005 | /* Adds in the default cgroups, if they weren't specified | |
2006 | * otherwise. */ | |
2007 | ||
ac155bb8 | 2008 | if (!u->manager->cgroup_hierarchy) |
df18d8c8 LP |
2009 | return 0; |
2010 | ||
06d4c99a LP |
2011 | if ((r = unit_add_one_default_cgroup(u, NULL)) < 0) |
2012 | return r; | |
2013 | ||
ac155bb8 | 2014 | STRV_FOREACH(c, u->manager->default_controllers) |
ab1f0633 LP |
2015 | unit_add_one_default_cgroup(u, *c); |
2016 | ||
ac155bb8 | 2017 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) |
ab1f0633 | 2018 | unit_add_one_default_cgroup(u, a->controller); |
06d4c99a LP |
2019 | |
2020 | return 0; | |
2021 | } | |
2022 | ||
8e274523 LP |
2023 | CGroupBonding* unit_get_default_cgroup(Unit *u) { |
2024 | assert(u); | |
2025 | ||
ac155bb8 | 2026 | return cgroup_bonding_find_list(u->cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); |
8e274523 LP |
2027 | } |
2028 | ||
ab1f0633 LP |
2029 | int unit_add_cgroup_attribute(Unit *u, const char *controller, const char *name, const char *value, CGroupAttributeMapCallback map_callback) { |
2030 | int r; | |
2031 | char *c = NULL; | |
2032 | CGroupAttribute *a; | |
2033 | ||
2034 | assert(u); | |
2035 | assert(name); | |
2036 | assert(value); | |
2037 | ||
2038 | if (!controller) { | |
2039 | const char *dot; | |
2040 | ||
2041 | dot = strchr(name, '.'); | |
2042 | if (!dot) | |
2043 | return -EINVAL; | |
2044 | ||
2045 | c = strndup(name, dot - name); | |
2046 | if (!c) | |
2047 | return -ENOMEM; | |
2048 | ||
2049 | controller = c; | |
2050 | } | |
2051 | ||
2052 | if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)) { | |
2053 | r = -EINVAL; | |
2054 | goto finish; | |
2055 | } | |
2056 | ||
2057 | a = new0(CGroupAttribute, 1); | |
2058 | if (!a) { | |
2059 | r = -ENOMEM; | |
2060 | goto finish; | |
2061 | } | |
2062 | ||
2063 | if (c) { | |
2064 | a->controller = c; | |
2065 | c = NULL; | |
2066 | } else | |
2067 | a->controller = strdup(controller); | |
2068 | ||
2069 | a->name = strdup(name); | |
2070 | a->value = strdup(value); | |
2071 | ||
2072 | if (!a->controller || !a->name || !a->value) { | |
2073 | free(a->controller); | |
2074 | free(a->name); | |
2075 | free(a->value); | |
2076 | free(a); | |
2077 | ||
2078 | return -ENOMEM; | |
2079 | } | |
2080 | ||
2081 | a->map_callback = map_callback; | |
2082 | ||
ac155bb8 | 2083 | LIST_PREPEND(CGroupAttribute, by_unit, u->cgroup_attributes, a); |
ab1f0633 LP |
2084 | |
2085 | r = 0; | |
2086 | ||
2087 | finish: | |
2088 | free(c); | |
2089 | return r; | |
2090 | } | |
2091 | ||
f6ff8c29 LP |
2092 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
2093 | char *t; | |
2094 | int r; | |
2095 | ||
2096 | assert(u); | |
2097 | assert(type); | |
2098 | assert(_found); | |
2099 | ||
ac155bb8 | 2100 | if (!(t = unit_name_change_suffix(u->id, type))) |
f6ff8c29 LP |
2101 | return -ENOMEM; |
2102 | ||
2103 | assert(!unit_has_name(u, t)); | |
2104 | ||
ac155bb8 | 2105 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
2106 | free(t); |
2107 | ||
9e2f7c11 | 2108 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2109 | |
2110 | return r; | |
2111 | } | |
2112 | ||
a16e1123 LP |
2113 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
2114 | Unit *found; | |
2115 | char *t; | |
2116 | ||
2117 | assert(u); | |
2118 | assert(type); | |
2119 | assert(_found); | |
2120 | ||
ac155bb8 | 2121 | if (!(t = unit_name_change_suffix(u->id, type))) |
a16e1123 LP |
2122 | return -ENOMEM; |
2123 | ||
2124 | assert(!unit_has_name(u, t)); | |
2125 | ||
ac155bb8 | 2126 | found = manager_get_unit(u->manager, t); |
a16e1123 LP |
2127 | free(t); |
2128 | ||
2129 | if (!found) | |
2130 | return -ENOENT; | |
2131 | ||
2132 | *_found = found; | |
2133 | return 0; | |
2134 | } | |
2135 | ||
9e2f7c11 LP |
2136 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
2137 | Unit *u = userdata; | |
2138 | assert(u); | |
2139 | ||
ac155bb8 | 2140 | return unit_name_to_prefix_and_instance(u->id); |
9e2f7c11 LP |
2141 | } |
2142 | ||
2143 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
2144 | Unit *u = userdata; | |
2145 | assert(u); | |
2146 | ||
ac155bb8 | 2147 | return unit_name_to_prefix(u->id); |
9e2f7c11 LP |
2148 | } |
2149 | ||
2150 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
2151 | Unit *u = userdata; | |
2152 | char *p, *r; | |
2153 | ||
2154 | assert(u); | |
2155 | ||
ac155bb8 | 2156 | if (!(p = unit_name_to_prefix(u->id))) |
9e2f7c11 LP |
2157 | return NULL; |
2158 | ||
2159 | r = unit_name_unescape(p); | |
2160 | free(p); | |
2161 | ||
2162 | return r; | |
2163 | } | |
2164 | ||
2165 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
2166 | Unit *u = userdata; | |
2167 | assert(u); | |
2168 | ||
ac155bb8 MS |
2169 | if (u->instance) |
2170 | return unit_name_unescape(u->instance); | |
9e2f7c11 LP |
2171 | |
2172 | return strdup(""); | |
2173 | } | |
2174 | ||
9fc50704 LP |
2175 | static char *specifier_filename(char specifier, void *data, void *userdata) { |
2176 | Unit *u = userdata; | |
2177 | assert(u); | |
2178 | ||
ac155bb8 MS |
2179 | if (u->instance) |
2180 | return unit_name_path_unescape(u->instance); | |
9fc50704 | 2181 | |
ac155bb8 | 2182 | return unit_name_to_path(u->instance); |
9fc50704 LP |
2183 | } |
2184 | ||
0aef4345 LP |
2185 | static char *specifier_cgroup(char specifier, void *data, void *userdata) { |
2186 | Unit *u = userdata; | |
2187 | assert(u); | |
2188 | ||
2189 | return default_cgroup_path(u); | |
2190 | } | |
2191 | ||
2192 | static char *specifier_cgroup_root(char specifier, void *data, void *userdata) { | |
2193 | Unit *u = userdata; | |
2194 | char *p; | |
2195 | assert(u); | |
2196 | ||
2197 | if (specifier == 'r') | |
ac155bb8 | 2198 | return strdup(u->manager->cgroup_hierarchy); |
0aef4345 | 2199 | |
9eb977db | 2200 | if (path_get_parent(u->manager->cgroup_hierarchy, &p) < 0) |
0aef4345 LP |
2201 | return strdup(""); |
2202 | ||
2203 | if (streq(p, "/")) { | |
2204 | free(p); | |
2205 | return strdup(""); | |
2206 | } | |
2207 | ||
2208 | return p; | |
2209 | } | |
2210 | ||
2211 | static char *specifier_runtime(char specifier, void *data, void *userdata) { | |
2212 | Unit *u = userdata; | |
2213 | assert(u); | |
2214 | ||
ac155bb8 | 2215 | if (u->manager->running_as == MANAGER_USER) { |
0aef4345 LP |
2216 | const char *e; |
2217 | ||
2218 | e = getenv("XDG_RUNTIME_DIR"); | |
2219 | if (e) | |
2220 | return strdup(e); | |
2221 | } | |
2222 | ||
2223 | return strdup("/run"); | |
2224 | } | |
2225 | ||
b2896c90 AK |
2226 | static char *specifier_user_name(char specifier, void *data, void *userdata) { |
2227 | Service *s = userdata; | |
2228 | int r; | |
2229 | const char *username; | |
2230 | ||
2231 | /* get USER env from our own env if set */ | |
2232 | if (!s->exec_context.user) | |
2233 | return getusername_malloc(); | |
2234 | ||
2235 | /* fish username from passwd */ | |
2236 | username = s->exec_context.user; | |
d05c5031 | 2237 | r = get_user_creds(&username, NULL, NULL, NULL, NULL); |
b2896c90 AK |
2238 | if (r < 0) |
2239 | return NULL; | |
2240 | ||
2241 | return strdup(username); | |
2242 | } | |
2243 | ||
2244 | static char *specifier_user_home(char specifier, void *data, void *userdata) { | |
2245 | Service *s = userdata; | |
2246 | int r; | |
2247 | const char *username, *home; | |
2248 | ||
2249 | /* return HOME if set, otherwise from passwd */ | |
2250 | if (!s->exec_context.user) { | |
2251 | char *h; | |
2252 | ||
2253 | r = get_home_dir(&h); | |
2254 | if (r < 0) | |
2255 | return NULL; | |
2256 | ||
2257 | return h; | |
2258 | } | |
2259 | ||
2260 | username = s->exec_context.user; | |
d05c5031 | 2261 | r = get_user_creds(&username, NULL, NULL, &home, NULL); |
b2896c90 AK |
2262 | if (r < 0) |
2263 | return NULL; | |
2264 | ||
2265 | return strdup(home); | |
2266 | } | |
2267 | ||
d05c5031 LP |
2268 | static char *specifier_user_shell(char specifier, void *data, void *userdata) { |
2269 | Service *s = userdata; | |
2270 | int r; | |
2271 | const char *username, *shell; | |
2272 | ||
2273 | /* return HOME if set, otherwise from passwd */ | |
2274 | if (!s->exec_context.user) { | |
2275 | char *sh; | |
2276 | ||
2277 | r = get_shell(&sh); | |
2278 | if (r < 0) | |
2279 | return strdup("/bin/sh"); | |
2280 | ||
2281 | return sh; | |
2282 | } | |
2283 | ||
2284 | username = s->exec_context.user; | |
2285 | r = get_user_creds(&username, NULL, NULL, NULL, &shell); | |
2286 | if (r < 0) | |
2287 | return strdup("/bin/sh"); | |
2288 | ||
2289 | return strdup(shell); | |
2290 | } | |
2291 | ||
9e2f7c11 LP |
2292 | char *unit_name_printf(Unit *u, const char* format) { |
2293 | ||
2294 | /* | |
2295 | * This will use the passed string as format string and | |
2296 | * replace the following specifiers: | |
2297 | * | |
2298 | * %n: the full id of the unit (foo@bar.waldo) | |
2299 | * %N: the id of the unit without the suffix (foo@bar) | |
2300 | * %p: the prefix (foo) | |
2301 | * %i: the instance (bar) | |
2302 | */ | |
2303 | ||
2304 | const Specifier table[] = { | |
ac155bb8 | 2305 | { 'n', specifier_string, u->id }, |
9e2f7c11 LP |
2306 | { 'N', specifier_prefix_and_instance, NULL }, |
2307 | { 'p', specifier_prefix, NULL }, | |
ac155bb8 | 2308 | { 'i', specifier_string, u->instance }, |
9e2f7c11 LP |
2309 | { 0, NULL, NULL } |
2310 | }; | |
2311 | ||
2312 | assert(u); | |
2313 | assert(format); | |
2314 | ||
2315 | return specifier_printf(format, table, u); | |
2316 | } | |
2317 | ||
2318 | char *unit_full_printf(Unit *u, const char *format) { | |
2319 | ||
2320 | /* This is similar to unit_name_printf() but also supports | |
0aef4345 LP |
2321 | * unescaping. Also, adds a couple of additional codes: |
2322 | * | |
2323 | * %c cgroup path of unit | |
2324 | * %r root cgroup path of this systemd instance (e.g. "/user/lennart/shared/systemd-4711") | |
2325 | * %R parent of root cgroup path (e.g. "/usr/lennart/shared") | |
2326 | * %t the runtime directory to place sockets in (e.g. "/run" or $XDG_RUNTIME_DIR) | |
b2896c90 AK |
2327 | * %u the username of the configured User or running user |
2328 | * %h the homedir of the configured User or running user | |
0aef4345 | 2329 | */ |
9e2f7c11 LP |
2330 | |
2331 | const Specifier table[] = { | |
ac155bb8 | 2332 | { 'n', specifier_string, u->id }, |
9e2f7c11 LP |
2333 | { 'N', specifier_prefix_and_instance, NULL }, |
2334 | { 'p', specifier_prefix, NULL }, | |
2335 | { 'P', specifier_prefix_unescaped, NULL }, | |
ac155bb8 | 2336 | { 'i', specifier_string, u->instance }, |
9e2f7c11 | 2337 | { 'I', specifier_instance_unescaped, NULL }, |
9fc50704 | 2338 | { 'f', specifier_filename, NULL }, |
0aef4345 LP |
2339 | { 'c', specifier_cgroup, NULL }, |
2340 | { 'r', specifier_cgroup_root, NULL }, | |
2341 | { 'R', specifier_cgroup_root, NULL }, | |
2342 | { 't', specifier_runtime, NULL }, | |
b2896c90 AK |
2343 | { 'u', specifier_user_name, NULL }, |
2344 | { 'h', specifier_user_home, NULL }, | |
d05c5031 | 2345 | { 's', specifier_user_shell, NULL }, |
9e2f7c11 LP |
2346 | { 0, NULL, NULL } |
2347 | }; | |
2348 | ||
2349 | assert(u); | |
2350 | assert(format); | |
2351 | ||
2352 | return specifier_printf(format, table, u); | |
2353 | } | |
2354 | ||
2355 | char **unit_full_printf_strv(Unit *u, char **l) { | |
2356 | size_t n; | |
2357 | char **r, **i, **j; | |
2358 | ||
2359 | /* Applies unit_full_printf to every entry in l */ | |
2360 | ||
2361 | assert(u); | |
2362 | ||
2363 | n = strv_length(l); | |
2364 | if (!(r = new(char*, n+1))) | |
2365 | return NULL; | |
2366 | ||
2367 | for (i = l, j = r; *i; i++, j++) | |
2368 | if (!(*j = unit_full_printf(u, *i))) | |
2369 | goto fail; | |
2370 | ||
2371 | *j = NULL; | |
2372 | return r; | |
2373 | ||
2374 | fail: | |
da19d5c1 | 2375 | for (j--; j >= r; j--) |
9e2f7c11 LP |
2376 | free(*j); |
2377 | ||
2378 | free(r); | |
2379 | ||
2380 | return NULL; | |
2381 | } | |
2382 | ||
05e343b7 LP |
2383 | int unit_watch_bus_name(Unit *u, const char *name) { |
2384 | assert(u); | |
2385 | assert(name); | |
2386 | ||
2387 | /* Watch a specific name on the bus. We only support one unit | |
2388 | * watching each name for now. */ | |
2389 | ||
ac155bb8 | 2390 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2391 | } |
2392 | ||
2393 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2394 | assert(u); | |
2395 | assert(name); | |
2396 | ||
ac155bb8 | 2397 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2398 | } |
2399 | ||
a16e1123 LP |
2400 | bool unit_can_serialize(Unit *u) { |
2401 | assert(u); | |
2402 | ||
2403 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2404 | } | |
2405 | ||
6b78f9b4 | 2406 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2407 | int r; |
2408 | ||
2409 | assert(u); | |
2410 | assert(f); | |
2411 | assert(fds); | |
2412 | ||
2413 | if (!unit_can_serialize(u)) | |
2414 | return 0; | |
2415 | ||
2416 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
2417 | return r; | |
2418 | ||
cca098b0 | 2419 | |
6b78f9b4 LP |
2420 | if (serialize_jobs) { |
2421 | if (u->job) { | |
2422 | fprintf(f, "job\n"); | |
2423 | job_serialize(u->job, f, fds); | |
2424 | } | |
2425 | ||
2426 | if (u->nop_job) { | |
2427 | fprintf(f, "job\n"); | |
2428 | job_serialize(u->nop_job, f, fds); | |
2429 | } | |
e0209d83 MS |
2430 | } |
2431 | ||
ac155bb8 MS |
2432 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2433 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2434 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2435 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2436 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
2791a8f8 | 2437 | |
ac155bb8 MS |
2438 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2439 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2440 | |
a16e1123 LP |
2441 | /* End marker */ |
2442 | fputc('\n', f); | |
2443 | return 0; | |
2444 | } | |
2445 | ||
2446 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2447 | va_list ap; | |
2448 | ||
2449 | assert(u); | |
2450 | assert(f); | |
2451 | assert(key); | |
2452 | assert(format); | |
2453 | ||
2454 | fputs(key, f); | |
2455 | fputc('=', f); | |
2456 | ||
2457 | va_start(ap, format); | |
2458 | vfprintf(f, format, ap); | |
2459 | va_end(ap); | |
2460 | ||
2461 | fputc('\n', f); | |
2462 | } | |
2463 | ||
2464 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2465 | assert(u); | |
2466 | assert(f); | |
2467 | assert(key); | |
2468 | assert(value); | |
2469 | ||
2470 | fprintf(f, "%s=%s\n", key, value); | |
2471 | } | |
2472 | ||
2473 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2474 | int r; | |
2475 | ||
2476 | assert(u); | |
2477 | assert(f); | |
2478 | assert(fds); | |
2479 | ||
2480 | if (!unit_can_serialize(u)) | |
2481 | return 0; | |
2482 | ||
2483 | for (;;) { | |
20c03b7b | 2484 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2485 | size_t k; |
2486 | ||
2487 | if (!fgets(line, sizeof(line), f)) { | |
2488 | if (feof(f)) | |
2489 | return 0; | |
2490 | return -errno; | |
2491 | } | |
2492 | ||
10f8e83c | 2493 | char_array_0(line); |
a16e1123 LP |
2494 | l = strstrip(line); |
2495 | ||
2496 | /* End marker */ | |
2497 | if (l[0] == 0) | |
2498 | return 0; | |
2499 | ||
2500 | k = strcspn(l, "="); | |
2501 | ||
2502 | if (l[k] == '=') { | |
2503 | l[k] = 0; | |
2504 | v = l+k+1; | |
2505 | } else | |
2506 | v = l+k; | |
2507 | ||
cca098b0 | 2508 | if (streq(l, "job")) { |
39a18c60 MS |
2509 | if (v[0] == '\0') { |
2510 | /* new-style serialized job */ | |
2511 | Job *j = job_new_raw(u); | |
2512 | if (!j) | |
2513 | return -ENOMEM; | |
2514 | ||
2515 | r = job_deserialize(j, f, fds); | |
2516 | if (r < 0) { | |
2517 | job_free(j); | |
2518 | return r; | |
2519 | } | |
cca098b0 | 2520 | |
39a18c60 MS |
2521 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2522 | if (r < 0) { | |
2523 | job_free(j); | |
2524 | return r; | |
2525 | } | |
e0209d83 MS |
2526 | |
2527 | r = job_install_deserialized(j); | |
2528 | if (r < 0) { | |
2529 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2530 | job_free(j); | |
2531 | return r; | |
2532 | } | |
39a18c60 MS |
2533 | } else { |
2534 | /* legacy */ | |
2535 | JobType type = job_type_from_string(v); | |
2536 | if (type < 0) | |
2537 | log_debug("Failed to parse job type value %s", v); | |
2538 | else | |
2539 | u->deserialized_job = type; | |
2540 | } | |
cca098b0 | 2541 | continue; |
8aaf019b | 2542 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2543 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2544 | continue; |
2545 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2546 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2547 | continue; |
2548 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2549 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2550 | continue; |
2551 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2552 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2553 | continue; |
2791a8f8 | 2554 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2555 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 LP |
2556 | continue; |
2557 | } else if (streq(l, "condition-result")) { | |
2558 | int b; | |
2559 | ||
2560 | if ((b = parse_boolean(v)) < 0) | |
2561 | log_debug("Failed to parse condition result value %s", v); | |
2562 | else | |
ac155bb8 | 2563 | u->condition_result = b; |
efbac6d2 LP |
2564 | |
2565 | continue; | |
8aaf019b | 2566 | } |
cca098b0 | 2567 | |
a16e1123 LP |
2568 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
2569 | return r; | |
2570 | } | |
2571 | } | |
2572 | ||
6e2ef85b LP |
2573 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2574 | Unit *device; | |
2575 | char *e; | |
2576 | int r; | |
2577 | ||
2578 | assert(u); | |
2579 | ||
2580 | if (!what) | |
2581 | return 0; | |
2582 | ||
2583 | /* Adds in links to the device node that this unit is based on */ | |
2584 | ||
8407a5d0 | 2585 | if (!is_device_path(what)) |
6e2ef85b LP |
2586 | return 0; |
2587 | ||
35eb6b12 LP |
2588 | e = unit_name_from_path(what, ".device"); |
2589 | if (!e) | |
6e2ef85b LP |
2590 | return -ENOMEM; |
2591 | ||
ac155bb8 | 2592 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2593 | free(e); |
2594 | ||
2595 | if (r < 0) | |
2596 | return r; | |
2597 | ||
7f2cddae | 2598 | if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true)) < 0) |
6e2ef85b LP |
2599 | return r; |
2600 | ||
2601 | if (wants) | |
2602 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
2603 | return r; | |
2604 | ||
2605 | return 0; | |
2606 | } | |
a16e1123 | 2607 | |
cca098b0 LP |
2608 | int unit_coldplug(Unit *u) { |
2609 | int r; | |
2610 | ||
2611 | assert(u); | |
2612 | ||
2613 | if (UNIT_VTABLE(u)->coldplug) | |
2614 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2615 | return r; | |
2616 | ||
39a18c60 MS |
2617 | if (u->job) { |
2618 | r = job_coldplug(u->job); | |
2619 | if (r < 0) | |
2620 | return r; | |
2621 | } else if (u->deserialized_job >= 0) { | |
2622 | /* legacy */ | |
2623 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2624 | if (r < 0) | |
cca098b0 LP |
2625 | return r; |
2626 | ||
ac155bb8 | 2627 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2628 | } |
2629 | ||
2630 | return 0; | |
2631 | } | |
2632 | ||
5831e9b7 | 2633 | void unit_status_printf(Unit *u, const char *status, const char *format, ...) { |
9e58ff9c LP |
2634 | va_list ap; |
2635 | ||
2636 | assert(u); | |
2637 | assert(format); | |
2638 | ||
ac155bb8 | 2639 | if (!manager_get_show_status(u->manager)) |
9e58ff9c LP |
2640 | return; |
2641 | ||
ac155bb8 | 2642 | if (!manager_is_booting_or_shutting_down(u->manager)) |
9e58ff9c LP |
2643 | return; |
2644 | ||
2645 | va_start(ap, format); | |
67e5cc4f | 2646 | status_vprintf(status, true, format, ap); |
9e58ff9c LP |
2647 | va_end(ap); |
2648 | } | |
2649 | ||
45fb0699 | 2650 | bool unit_need_daemon_reload(Unit *u) { |
1b64d026 LP |
2651 | struct stat st; |
2652 | ||
45fb0699 LP |
2653 | assert(u); |
2654 | ||
ac155bb8 | 2655 | if (u->fragment_path) { |
5f4b19f4 | 2656 | zero(st); |
ac155bb8 | 2657 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2658 | /* What, cannot access this anymore? */ |
2659 | return true; | |
45fb0699 | 2660 | |
ac155bb8 MS |
2661 | if (u->fragment_mtime > 0 && |
2662 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2663 | return true; |
2664 | } | |
2665 | ||
1b64d026 LP |
2666 | if (u->source_path) { |
2667 | zero(st); | |
2668 | if (stat(u->source_path, &st) < 0) | |
2669 | return true; | |
2670 | ||
2671 | if (u->source_mtime > 0 && | |
2672 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2673 | return true; | |
2674 | } | |
5f4b19f4 LP |
2675 | |
2676 | return false; | |
45fb0699 LP |
2677 | } |
2678 | ||
fdf20a31 | 2679 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2680 | assert(u); |
2681 | ||
fdf20a31 MM |
2682 | if (UNIT_VTABLE(u)->reset_failed) |
2683 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2684 | } |
2685 | ||
a7f241db LP |
2686 | Unit *unit_following(Unit *u) { |
2687 | assert(u); | |
2688 | ||
2689 | if (UNIT_VTABLE(u)->following) | |
2690 | return UNIT_VTABLE(u)->following(u); | |
2691 | ||
2692 | return NULL; | |
2693 | } | |
2694 | ||
18ffdfda LP |
2695 | bool unit_pending_inactive(Unit *u) { |
2696 | assert(u); | |
2697 | ||
2698 | /* Returns true if the unit is inactive or going down */ | |
2699 | ||
2700 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
2701 | return true; | |
2702 | ||
ac155bb8 | 2703 | if (u->job && u->job->type == JOB_STOP) |
18ffdfda LP |
2704 | return true; |
2705 | ||
2706 | return false; | |
2707 | } | |
2708 | ||
f976f3f6 LP |
2709 | bool unit_pending_active(Unit *u) { |
2710 | assert(u); | |
2711 | ||
f60c2665 | 2712 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2713 | |
2714 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2715 | return true; | |
2716 | ||
ac155bb8 MS |
2717 | if (u->job && |
2718 | (u->job->type == JOB_START || | |
2719 | u->job->type == JOB_RELOAD_OR_START || | |
2720 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2721 | return true; |
2722 | ||
2723 | return false; | |
2724 | } | |
2725 | ||
c74f17d9 | 2726 | int unit_kill(Unit *u, KillWho w, int signo, DBusError *error) { |
8a0867d6 LP |
2727 | assert(u); |
2728 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2729 | assert(signo > 0); |
2730 | assert(signo < _NSIG); | |
2731 | ||
8a0867d6 LP |
2732 | if (!UNIT_VTABLE(u)->kill) |
2733 | return -ENOTSUP; | |
2734 | ||
c74f17d9 | 2735 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2736 | } |
2737 | ||
6210e7fc LP |
2738 | int unit_following_set(Unit *u, Set **s) { |
2739 | assert(u); | |
2740 | assert(s); | |
2741 | ||
2742 | if (UNIT_VTABLE(u)->following_set) | |
2743 | return UNIT_VTABLE(u)->following_set(u, s); | |
2744 | ||
2745 | *s = NULL; | |
2746 | return 0; | |
2747 | } | |
2748 | ||
a4375746 LP |
2749 | UnitFileState unit_get_unit_file_state(Unit *u) { |
2750 | assert(u); | |
2751 | ||
ac155bb8 MS |
2752 | if (u->unit_file_state < 0 && u->fragment_path) |
2753 | u->unit_file_state = unit_file_get_state( | |
2754 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, | |
9eb977db | 2755 | NULL, path_get_file_name(u->fragment_path)); |
a4375746 | 2756 | |
ac155bb8 | 2757 | return u->unit_file_state; |
a4375746 LP |
2758 | } |
2759 | ||
57020a3a LP |
2760 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
2761 | assert(ref); | |
2762 | assert(u); | |
2763 | ||
2764 | if (ref->unit) | |
2765 | unit_ref_unset(ref); | |
2766 | ||
2767 | ref->unit = u; | |
ac155bb8 | 2768 | LIST_PREPEND(UnitRef, refs, u->refs, ref); |
57020a3a LP |
2769 | return u; |
2770 | } | |
2771 | ||
2772 | void unit_ref_unset(UnitRef *ref) { | |
2773 | assert(ref); | |
2774 | ||
2775 | if (!ref->unit) | |
2776 | return; | |
2777 | ||
ac155bb8 | 2778 | LIST_REMOVE(UnitRef, refs, ref->unit->refs, ref); |
57020a3a LP |
2779 | ref->unit = NULL; |
2780 | } | |
2781 | ||
7c8fa05c LP |
2782 | int unit_add_one_mount_link(Unit *u, Mount *m) { |
2783 | char **i; | |
2784 | ||
2785 | assert(u); | |
2786 | assert(m); | |
2787 | ||
2788 | if (u->load_state != UNIT_LOADED || | |
2789 | UNIT(m)->load_state != UNIT_LOADED) | |
2790 | return 0; | |
2791 | ||
2792 | STRV_FOREACH(i, u->requires_mounts_for) { | |
2793 | ||
2794 | if (UNIT(m) == u) | |
2795 | continue; | |
2796 | ||
2797 | if (!path_startswith(*i, m->where)) | |
2798 | continue; | |
2799 | ||
2800 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true); | |
2801 | } | |
2802 | ||
2803 | return 0; | |
2804 | } | |
2805 | ||
2806 | int unit_add_mount_links(Unit *u) { | |
2807 | Unit *other; | |
2808 | int r; | |
2809 | ||
2810 | assert(u); | |
2811 | ||
2812 | LIST_FOREACH(units_by_type, other, u->manager->units_by_type[UNIT_MOUNT]) { | |
2813 | r = unit_add_one_mount_link(u, MOUNT(other)); | |
2814 | if (r < 0) | |
2815 | return r; | |
2816 | } | |
2817 | ||
2818 | return 0; | |
2819 | } | |
2820 | ||
cba6e062 LP |
2821 | int unit_exec_context_defaults(Unit *u, ExecContext *c) { |
2822 | unsigned i; | |
2823 | int r; | |
2824 | ||
e06c73cc LP |
2825 | assert(u); |
2826 | assert(c); | |
2827 | ||
cba6e062 | 2828 | /* This only copies in the ones that need memory */ |
e06c73cc | 2829 | |
cba6e062 LP |
2830 | for (i = 0; i < RLIMIT_NLIMITS; i++) |
2831 | if (u->manager->rlimit[i] && !c->rlimit[i]) { | |
2832 | c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
2833 | if (!c->rlimit[i]) | |
2834 | return -ENOMEM; | |
2835 | } | |
2836 | ||
2837 | if (u->manager->running_as == MANAGER_USER && | |
2838 | !c->working_directory) { | |
e06c73cc | 2839 | |
cba6e062 LP |
2840 | r = get_home_dir(&c->working_directory); |
2841 | if (r < 0) | |
2842 | return r; | |
2843 | } | |
2844 | ||
2845 | return 0; | |
e06c73cc LP |
2846 | } |
2847 | ||
94f04347 LP |
2848 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
2849 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2850 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2851 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2852 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2853 | [UNIT_ACTIVATING] = "activating", |
2854 | [UNIT_DEACTIVATING] = "deactivating" | |
2855 | }; | |
2856 | ||
2857 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2858 | ||
2859 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2860 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2861 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 | 2862 | [UNIT_REQUISITE] = "Requisite", |
9e2f7c11 | 2863 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
ac6a4abe MS |
2864 | [UNIT_WANTS] = "Wants", |
2865 | [UNIT_BINDS_TO] = "BindsTo", | |
2866 | [UNIT_PART_OF] = "PartOf", | |
94f04347 | 2867 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2868 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 | 2869 | [UNIT_WANTED_BY] = "WantedBy", |
ac6a4abe MS |
2870 | [UNIT_BOUND_BY] = "BoundBy", |
2871 | [UNIT_CONSISTS_OF] = "ConsistsOf", | |
94f04347 | 2872 | [UNIT_CONFLICTS] = "Conflicts", |
69dd2852 | 2873 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
94f04347 LP |
2874 | [UNIT_BEFORE] = "Before", |
2875 | [UNIT_AFTER] = "After", | |
57020a3a LP |
2876 | [UNIT_ON_FAILURE] = "OnFailure", |
2877 | [UNIT_TRIGGERS] = "Triggers", | |
4dcc1cb4 | 2878 | [UNIT_TRIGGERED_BY] = "TriggeredBy", |
7f2cddae | 2879 | [UNIT_PROPAGATES_RELOAD_TO] = "PropagatesReloadTo", |
ac6a4abe MS |
2880 | [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom", |
2881 | [UNIT_REFERENCES] = "References", | |
2882 | [UNIT_REFERENCED_BY] = "ReferencedBy", | |
94f04347 LP |
2883 | }; |
2884 | ||
2885 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |