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Commit | Line | Data |
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87f0e418 LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
87f0e418 LP |
22 | #include <assert.h> |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <sys/epoll.h> | |
26 | #include <sys/timerfd.h> | |
27 | #include <sys/poll.h> | |
0301abf4 LP |
28 | #include <stdlib.h> |
29 | #include <unistd.h> | |
87f0e418 LP |
30 | |
31 | #include "set.h" | |
32 | #include "unit.h" | |
33 | #include "macro.h" | |
34 | #include "strv.h" | |
35 | #include "load-fragment.h" | |
36 | #include "load-dropin.h" | |
37 | #include "log.h" | |
9e2f7c11 LP |
38 | #include "unit-name.h" |
39 | #include "specifier.h" | |
4139c1b2 | 40 | #include "dbus-unit.h" |
87f0e418 LP |
41 | |
42 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
43 | [UNIT_SERVICE] = &service_vtable, | |
44 | [UNIT_TIMER] = &timer_vtable, | |
45 | [UNIT_SOCKET] = &socket_vtable, | |
46 | [UNIT_TARGET] = &target_vtable, | |
47 | [UNIT_DEVICE] = &device_vtable, | |
48 | [UNIT_MOUNT] = &mount_vtable, | |
49 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 50 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
51 | [UNIT_SWAP] = &swap_vtable, |
52 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
53 | }; |
54 | ||
87f0e418 LP |
55 | Unit *unit_new(Manager *m) { |
56 | Unit *u; | |
57 | ||
58 | assert(m); | |
59 | ||
60 | if (!(u = new0(Unit, 1))) | |
61 | return NULL; | |
62 | ||
63 | if (!(u->meta.names = set_new(string_hash_func, string_compare_func))) { | |
64 | free(u); | |
65 | return NULL; | |
66 | } | |
67 | ||
68 | u->meta.manager = m; | |
69 | u->meta.type = _UNIT_TYPE_INVALID; | |
cca098b0 | 70 | u->meta.deserialized_job = _JOB_TYPE_INVALID; |
87f0e418 LP |
71 | |
72 | return u; | |
73 | } | |
74 | ||
f278026d LP |
75 | bool unit_has_name(Unit *u, const char *name) { |
76 | assert(u); | |
77 | assert(name); | |
78 | ||
79 | return !!set_get(u->meta.names, (char*) name); | |
80 | } | |
81 | ||
87f0e418 LP |
82 | int unit_add_name(Unit *u, const char *text) { |
83 | UnitType t; | |
9e2f7c11 | 84 | char *s = NULL, *i = NULL; |
87f0e418 LP |
85 | int r; |
86 | ||
87 | assert(u); | |
88 | assert(text); | |
89 | ||
9e2f7c11 LP |
90 | if (unit_name_is_template(text)) { |
91 | if (!u->meta.instance) | |
92 | return -EINVAL; | |
87f0e418 | 93 | |
9e2f7c11 LP |
94 | s = unit_name_replace_instance(text, u->meta.instance); |
95 | } else | |
96 | s = strdup(text); | |
87f0e418 | 97 | |
9e2f7c11 LP |
98 | if (!s) |
99 | return -ENOMEM; | |
87f0e418 | 100 | |
9e2f7c11 LP |
101 | if (!unit_name_is_valid(s)) { |
102 | r = -EINVAL; | |
103 | goto fail; | |
104 | } | |
e537352b | 105 | |
9e2f7c11 | 106 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 107 | |
9e2f7c11 LP |
108 | if (u->meta.type != _UNIT_TYPE_INVALID && t != u->meta.type) { |
109 | r = -EINVAL; | |
110 | goto fail; | |
111 | } | |
87f0e418 | 112 | |
9e2f7c11 LP |
113 | if ((r = unit_name_to_instance(s, &i)) < 0) |
114 | goto fail; | |
87f0e418 | 115 | |
9e2f7c11 LP |
116 | if (i && unit_vtable[t]->no_instances) |
117 | goto fail; | |
118 | ||
119 | if (u->meta.type != _UNIT_TYPE_INVALID && !streq_ptr(u->meta.instance, i)) { | |
120 | r = -EINVAL; | |
121 | goto fail; | |
122 | } | |
123 | ||
124 | if (unit_vtable[t]->no_alias && | |
125 | !set_isempty(u->meta.names) && | |
126 | !set_get(u->meta.names, s)) { | |
127 | r = -EEXIST; | |
128 | goto fail; | |
129 | } | |
130 | ||
4f0f902f LP |
131 | if (hashmap_size(u->meta.manager->units) >= MANAGER_MAX_NAMES) { |
132 | r = -E2BIG; | |
133 | goto fail; | |
134 | } | |
135 | ||
9e2f7c11 LP |
136 | if ((r = set_put(u->meta.names, s)) < 0) { |
137 | if (r == -EEXIST) | |
138 | r = 0; | |
139 | goto fail; | |
87f0e418 LP |
140 | } |
141 | ||
142 | if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) { | |
143 | set_remove(u->meta.names, s); | |
9e2f7c11 | 144 | goto fail; |
87f0e418 LP |
145 | } |
146 | ||
e537352b | 147 | if (u->meta.type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 148 | |
e537352b | 149 | u->meta.type = t; |
9e2f7c11 LP |
150 | u->meta.id = s; |
151 | u->meta.instance = i; | |
152 | ||
153 | LIST_PREPEND(Meta, units_per_type, u->meta.manager->units_per_type[t], &u->meta); | |
e537352b LP |
154 | |
155 | if (UNIT_VTABLE(u)->init) | |
156 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
157 | } else |
158 | free(i); | |
87f0e418 | 159 | |
c1e1601e | 160 | unit_add_to_dbus_queue(u); |
87f0e418 | 161 | return 0; |
9e2f7c11 LP |
162 | |
163 | fail: | |
164 | free(s); | |
165 | free(i); | |
166 | ||
167 | return r; | |
87f0e418 LP |
168 | } |
169 | ||
0ae97ec1 | 170 | int unit_choose_id(Unit *u, const char *name) { |
9e2f7c11 | 171 | char *s, *t = NULL; |
0ae97ec1 LP |
172 | |
173 | assert(u); | |
174 | assert(name); | |
175 | ||
9e2f7c11 LP |
176 | if (unit_name_is_template(name)) { |
177 | ||
178 | if (!u->meta.instance) | |
179 | return -EINVAL; | |
180 | ||
181 | if (!(t = unit_name_replace_instance(name, u->meta.instance))) | |
182 | return -ENOMEM; | |
183 | ||
184 | name = t; | |
185 | } | |
186 | ||
0ae97ec1 | 187 | /* Selects one of the names of this unit as the id */ |
9e2f7c11 LP |
188 | s = set_get(u->meta.names, (char*) name); |
189 | free(t); | |
0ae97ec1 | 190 | |
9e2f7c11 | 191 | if (!s) |
0ae97ec1 LP |
192 | return -ENOENT; |
193 | ||
194 | u->meta.id = s; | |
c1e1601e | 195 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 196 | |
0ae97ec1 LP |
197 | return 0; |
198 | } | |
199 | ||
f50e0a01 LP |
200 | int unit_set_description(Unit *u, const char *description) { |
201 | char *s; | |
202 | ||
203 | assert(u); | |
204 | ||
205 | if (!(s = strdup(description))) | |
206 | return -ENOMEM; | |
207 | ||
208 | free(u->meta.description); | |
209 | u->meta.description = s; | |
c1e1601e LP |
210 | |
211 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
212 | return 0; |
213 | } | |
214 | ||
701cc384 LP |
215 | bool unit_check_gc(Unit *u) { |
216 | assert(u); | |
217 | ||
b86d44e5 LP |
218 | if (u->meta.load_state == UNIT_STUB) |
219 | return true; | |
220 | ||
701cc384 LP |
221 | if (UNIT_VTABLE(u)->no_gc) |
222 | return true; | |
223 | ||
224 | if (u->meta.job) | |
225 | return true; | |
226 | ||
227 | if (unit_active_state(u) != UNIT_INACTIVE) | |
228 | return true; | |
229 | ||
230 | if (UNIT_VTABLE(u)->check_gc) | |
231 | if (UNIT_VTABLE(u)->check_gc(u)) | |
232 | return true; | |
233 | ||
234 | return false; | |
235 | } | |
236 | ||
87f0e418 LP |
237 | void unit_add_to_load_queue(Unit *u) { |
238 | assert(u); | |
819e213f | 239 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 LP |
240 | |
241 | if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue) | |
242 | return; | |
243 | ||
244 | LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
245 | u->meta.in_load_queue = true; | |
246 | } | |
247 | ||
23a177ef LP |
248 | void unit_add_to_cleanup_queue(Unit *u) { |
249 | assert(u); | |
250 | ||
251 | if (u->meta.in_cleanup_queue) | |
252 | return; | |
253 | ||
254 | LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
255 | u->meta.in_cleanup_queue = true; | |
256 | } | |
257 | ||
701cc384 LP |
258 | void unit_add_to_gc_queue(Unit *u) { |
259 | assert(u); | |
260 | ||
261 | if (u->meta.in_gc_queue || u->meta.in_cleanup_queue) | |
262 | return; | |
263 | ||
264 | if (unit_check_gc(u)) | |
265 | return; | |
266 | ||
267 | LIST_PREPEND(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
268 | u->meta.in_gc_queue = true; | |
269 | ||
270 | u->meta.manager->n_in_gc_queue ++; | |
271 | ||
272 | if (u->meta.manager->gc_queue_timestamp <= 0) | |
273 | u->meta.manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
274 | } | |
275 | ||
c1e1601e LP |
276 | void unit_add_to_dbus_queue(Unit *u) { |
277 | assert(u); | |
819e213f | 278 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
c1e1601e | 279 | |
94b6dfa2 | 280 | if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue) |
c1e1601e LP |
281 | return; |
282 | ||
94b6dfa2 LP |
283 | if (set_isempty(u->meta.manager->subscribed)) { |
284 | u->meta.sent_dbus_new_signal = true; | |
285 | return; | |
286 | } | |
287 | ||
c1e1601e LP |
288 | LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); |
289 | u->meta.in_dbus_queue = true; | |
290 | } | |
291 | ||
87f0e418 LP |
292 | static void bidi_set_free(Unit *u, Set *s) { |
293 | Iterator i; | |
294 | Unit *other; | |
295 | ||
296 | assert(u); | |
297 | ||
298 | /* Frees the set and makes sure we are dropped from the | |
299 | * inverse pointers */ | |
300 | ||
301 | SET_FOREACH(other, s, i) { | |
302 | UnitDependency d; | |
303 | ||
304 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
305 | set_remove(other->meta.dependencies[d], u); | |
701cc384 LP |
306 | |
307 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
308 | } |
309 | ||
310 | set_free(s); | |
311 | } | |
312 | ||
313 | void unit_free(Unit *u) { | |
314 | UnitDependency d; | |
315 | Iterator i; | |
316 | char *t; | |
317 | ||
318 | assert(u); | |
319 | ||
c1e1601e LP |
320 | bus_unit_send_removed_signal(u); |
321 | ||
a013b84b LP |
322 | if (u->meta.load_state != UNIT_STUB) |
323 | if (UNIT_VTABLE(u)->done) | |
324 | UNIT_VTABLE(u)->done(u); | |
325 | ||
87f0e418 LP |
326 | SET_FOREACH(t, u->meta.names, i) |
327 | hashmap_remove_value(u->meta.manager->units, t, u); | |
328 | ||
964e0949 LP |
329 | if (u->meta.job) |
330 | job_free(u->meta.job); | |
331 | ||
332 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
333 | bidi_set_free(u, u->meta.dependencies[d]); | |
334 | ||
ef734fd6 LP |
335 | if (u->meta.type != _UNIT_TYPE_INVALID) |
336 | LIST_REMOVE(Meta, units_per_type, u->meta.manager->units_per_type[u->meta.type], &u->meta); | |
337 | ||
87f0e418 LP |
338 | if (u->meta.in_load_queue) |
339 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
340 | ||
c1e1601e LP |
341 | if (u->meta.in_dbus_queue) |
342 | LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
343 | ||
23a177ef LP |
344 | if (u->meta.in_cleanup_queue) |
345 | LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
346 | ||
701cc384 LP |
347 | if (u->meta.in_gc_queue) { |
348 | LIST_REMOVE(Meta, gc_queue, u->meta.manager->gc_queue, &u->meta); | |
349 | u->meta.manager->n_in_gc_queue--; | |
350 | } | |
351 | ||
e537352b | 352 | cgroup_bonding_free_list(u->meta.cgroup_bondings); |
87f0e418 | 353 | |
87f0e418 | 354 | free(u->meta.description); |
6be1e7d5 | 355 | free(u->meta.fragment_path); |
87f0e418 LP |
356 | |
357 | while ((t = set_steal_first(u->meta.names))) | |
358 | free(t); | |
359 | set_free(u->meta.names); | |
360 | ||
9e2f7c11 LP |
361 | free(u->meta.instance); |
362 | ||
87f0e418 LP |
363 | free(u); |
364 | } | |
365 | ||
366 | UnitActiveState unit_active_state(Unit *u) { | |
367 | assert(u); | |
368 | ||
369 | if (u->meta.load_state != UNIT_LOADED) | |
370 | return UNIT_INACTIVE; | |
371 | ||
372 | return UNIT_VTABLE(u)->active_state(u); | |
373 | } | |
374 | ||
10a94420 LP |
375 | const char* unit_sub_state_to_string(Unit *u) { |
376 | assert(u); | |
377 | ||
378 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
379 | } | |
380 | ||
23a177ef LP |
381 | static void complete_move(Set **s, Set **other) { |
382 | assert(s); | |
383 | assert(other); | |
87f0e418 | 384 | |
23a177ef LP |
385 | if (!*other) |
386 | return; | |
87f0e418 LP |
387 | |
388 | if (*s) | |
23a177ef LP |
389 | set_move(*s, *other); |
390 | else { | |
391 | *s = *other; | |
392 | *other = NULL; | |
393 | } | |
394 | } | |
87f0e418 | 395 | |
23a177ef LP |
396 | static void merge_names(Unit *u, Unit *other) { |
397 | char *t; | |
398 | Iterator i; | |
87f0e418 | 399 | |
23a177ef LP |
400 | assert(u); |
401 | assert(other); | |
402 | ||
403 | complete_move(&u->meta.names, &other->meta.names); | |
404 | ||
405 | while ((t = set_steal_first(other->meta.names))) | |
406 | free(t); | |
407 | ||
408 | set_free(other->meta.names); | |
409 | other->meta.names = NULL; | |
410 | other->meta.id = NULL; | |
411 | ||
412 | SET_FOREACH(t, u->meta.names, i) | |
413 | assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0); | |
87f0e418 LP |
414 | } |
415 | ||
23a177ef LP |
416 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
417 | Iterator i; | |
418 | Unit *back; | |
87f0e418 | 419 | int r; |
23a177ef LP |
420 | |
421 | assert(u); | |
422 | assert(other); | |
423 | assert(d < _UNIT_DEPENDENCY_MAX); | |
424 | ||
425 | SET_FOREACH(back, other->meta.dependencies[d], i) { | |
426 | UnitDependency k; | |
427 | ||
428 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
429 | if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) { | |
430 | ||
431 | if (r == -EEXIST) | |
432 | set_remove(back->meta.dependencies[k], other); | |
433 | else | |
434 | assert(r == -ENOENT); | |
435 | } | |
436 | } | |
437 | ||
438 | complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]); | |
439 | ||
440 | set_free(other->meta.dependencies[d]); | |
441 | other->meta.dependencies[d] = NULL; | |
442 | } | |
443 | ||
444 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
445 | UnitDependency d; |
446 | ||
447 | assert(u); | |
448 | assert(other); | |
449 | assert(u->meta.manager == other->meta.manager); | |
9e2f7c11 | 450 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 | 451 | |
cc916967 LP |
452 | other = unit_follow_merge(other); |
453 | ||
23a177ef LP |
454 | if (other == u) |
455 | return 0; | |
456 | ||
9e2f7c11 LP |
457 | if (u->meta.type != other->meta.type) |
458 | return -EINVAL; | |
459 | ||
460 | if (!streq_ptr(u->meta.instance, other->meta.instance)) | |
87f0e418 LP |
461 | return -EINVAL; |
462 | ||
cc916967 LP |
463 | if (other->meta.load_state != UNIT_STUB && |
464 | other->meta.load_state != UNIT_FAILED) | |
23a177ef | 465 | return -EEXIST; |
87f0e418 | 466 | |
819e213f LP |
467 | if (other->meta.job) |
468 | return -EEXIST; | |
469 | ||
470 | if (unit_active_state(other) != UNIT_INACTIVE) | |
471 | return -EEXIST; | |
472 | ||
87f0e418 | 473 | /* Merge names */ |
23a177ef | 474 | merge_names(u, other); |
87f0e418 LP |
475 | |
476 | /* Merge dependencies */ | |
477 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 478 | merge_dependencies(u, other, d); |
87f0e418 | 479 | |
23a177ef LP |
480 | other->meta.load_state = UNIT_MERGED; |
481 | other->meta.merged_into = u; | |
482 | ||
3616a49c LP |
483 | /* If there is still some data attached to the other node, we |
484 | * don't need it anymore, and can free it. */ | |
485 | if (other->meta.load_state != UNIT_STUB) | |
486 | if (UNIT_VTABLE(other)->done) | |
487 | UNIT_VTABLE(other)->done(other); | |
488 | ||
489 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
490 | unit_add_to_cleanup_queue(other); |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
495 | int unit_merge_by_name(Unit *u, const char *name) { | |
496 | Unit *other; | |
9e2f7c11 LP |
497 | int r; |
498 | char *s = NULL; | |
23a177ef LP |
499 | |
500 | assert(u); | |
501 | assert(name); | |
502 | ||
9e2f7c11 LP |
503 | if (unit_name_is_template(name)) { |
504 | if (!u->meta.instance) | |
505 | return -EINVAL; | |
506 | ||
507 | if (!(s = unit_name_replace_instance(name, u->meta.instance))) | |
508 | return -ENOMEM; | |
509 | ||
510 | name = s; | |
511 | } | |
512 | ||
23a177ef | 513 | if (!(other = manager_get_unit(u->meta.manager, name))) |
9e2f7c11 LP |
514 | r = unit_add_name(u, name); |
515 | else | |
516 | r = unit_merge(u, other); | |
23a177ef | 517 | |
9e2f7c11 LP |
518 | free(s); |
519 | return r; | |
23a177ef LP |
520 | } |
521 | ||
522 | Unit* unit_follow_merge(Unit *u) { | |
523 | assert(u); | |
524 | ||
525 | while (u->meta.load_state == UNIT_MERGED) | |
526 | assert_se(u = u->meta.merged_into); | |
527 | ||
528 | return u; | |
529 | } | |
530 | ||
531 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
532 | int r; | |
533 | ||
534 | assert(u); | |
535 | assert(c); | |
536 | ||
ecc6e2b8 LP |
537 | if (c->std_output != EXEC_OUTPUT_KMSG && |
538 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
539 | c->std_error != EXEC_OUTPUT_KMSG && | |
540 | c->std_error != EXEC_OUTPUT_SYSLOG) | |
23a177ef LP |
541 | return 0; |
542 | ||
543 | /* If syslog or kernel logging is requested, make sure our own | |
544 | * logging daemon is run first. */ | |
545 | ||
701cc384 | 546 | if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
547 | return r; |
548 | ||
549 | if (u->meta.manager->running_as != MANAGER_SESSION) | |
701cc384 | 550 | if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET, NULL, true)) < 0) |
23a177ef LP |
551 | return r; |
552 | ||
87f0e418 LP |
553 | return 0; |
554 | } | |
555 | ||
87f0e418 LP |
556 | const char *unit_description(Unit *u) { |
557 | assert(u); | |
558 | ||
559 | if (u->meta.description) | |
560 | return u->meta.description; | |
561 | ||
9e2f7c11 | 562 | return u->meta.id; |
87f0e418 LP |
563 | } |
564 | ||
565 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
87f0e418 LP |
566 | char *t; |
567 | UnitDependency d; | |
568 | Iterator i; | |
47be870b LP |
569 | char *p2; |
570 | const char *prefix2; | |
8e274523 | 571 | CGroupBonding *b; |
173e3821 LP |
572 | char |
573 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
574 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
575 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
576 | timestamp4[FORMAT_TIMESTAMP_MAX]; | |
87f0e418 LP |
577 | |
578 | assert(u); | |
9e2f7c11 | 579 | assert(u->meta.type >= 0); |
87f0e418 LP |
580 | |
581 | if (!prefix) | |
582 | prefix = ""; | |
47be870b LP |
583 | p2 = strappend(prefix, "\t"); |
584 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
585 | |
586 | fprintf(f, | |
40d50879 | 587 | "%s-> Unit %s:\n" |
87f0e418 | 588 | "%s\tDescription: %s\n" |
9e2f7c11 | 589 | "%s\tInstance: %s\n" |
87f0e418 | 590 | "%s\tUnit Load State: %s\n" |
2fad8195 | 591 | "%s\tUnit Active State: %s\n" |
173e3821 | 592 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 593 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 594 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 595 | "%s\tInactive Enter Timestamp: %s\n" |
bc0f8771 LP |
596 | "%s\tGC Check Good: %s\n" |
597 | "%s\tOnly By Dependency: %s\n", | |
9e2f7c11 | 598 | prefix, u->meta.id, |
87f0e418 | 599 | prefix, unit_description(u), |
9e2f7c11 | 600 | prefix, strna(u->meta.instance), |
94f04347 | 601 | prefix, unit_load_state_to_string(u->meta.load_state), |
2fad8195 | 602 | prefix, unit_active_state_to_string(unit_active_state(u)), |
871d7de4 LP |
603 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.inactive_exit_timestamp.realtime)), |
604 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)), | |
605 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)), | |
606 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)), | |
bc0f8771 LP |
607 | prefix, yes_no(unit_check_gc(u)), |
608 | prefix, yes_no(u->meta.only_by_dependency)); | |
0301abf4 | 609 | |
87f0e418 LP |
610 | SET_FOREACH(t, u->meta.names, i) |
611 | fprintf(f, "%s\tName: %s\n", prefix, t); | |
612 | ||
23a177ef LP |
613 | if (u->meta.fragment_path) |
614 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path); | |
615 | ||
87f0e418 LP |
616 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
617 | Unit *other; | |
618 | ||
87f0e418 | 619 | SET_FOREACH(other, u->meta.dependencies[d], i) |
9e2f7c11 | 620 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->meta.id); |
87f0e418 LP |
621 | } |
622 | ||
23a177ef | 623 | if (u->meta.load_state == UNIT_LOADED) { |
b0650475 LP |
624 | fprintf(f, |
625 | "%s\tRecursive Stop: %s\n" | |
626 | "%s\tStop When Unneeded: %s\n", | |
627 | prefix, yes_no(u->meta.recursive_stop), | |
628 | prefix, yes_no(u->meta.stop_when_unneeded)); | |
629 | ||
23a177ef LP |
630 | LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) |
631 | fprintf(f, "%s\tControlGroup: %s:%s\n", | |
632 | prefix, b->controller, b->path); | |
8e274523 | 633 | |
23a177ef LP |
634 | if (UNIT_VTABLE(u)->dump) |
635 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 LP |
636 | |
637 | } else if (u->meta.load_state == UNIT_MERGED) | |
638 | fprintf(f, | |
639 | "%s\tMerged into: %s\n", | |
9e2f7c11 | 640 | prefix, u->meta.merged_into->meta.id); |
87f0e418 LP |
641 | |
642 | if (u->meta.job) | |
643 | job_dump(u->meta.job, f, prefix2); | |
644 | ||
47be870b | 645 | free(p2); |
87f0e418 LP |
646 | } |
647 | ||
648 | /* Common implementation for multiple backends */ | |
e537352b | 649 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
650 | int r; |
651 | ||
652 | assert(u); | |
23a177ef LP |
653 | |
654 | /* Load a .service file */ | |
e537352b | 655 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
656 | return r; |
657 | ||
e537352b | 658 | if (u->meta.load_state == UNIT_STUB) |
23a177ef LP |
659 | return -ENOENT; |
660 | ||
661 | /* Load drop-in directory data */ | |
662 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
663 | return r; | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | /* Common implementation for multiple backends */ | |
e537352b | 669 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 670 | int r; |
87f0e418 LP |
671 | |
672 | assert(u); | |
673 | ||
23a177ef LP |
674 | /* Same as unit_load_fragment_and_dropin(), but whether |
675 | * something can be loaded or not doesn't matter. */ | |
676 | ||
677 | /* Load a .service file */ | |
e537352b | 678 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
679 | return r; |
680 | ||
e537352b LP |
681 | if (u->meta.load_state == UNIT_STUB) |
682 | u->meta.load_state = UNIT_LOADED; | |
d46de8a1 | 683 | |
87f0e418 | 684 | /* Load drop-in directory data */ |
23a177ef | 685 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
686 | return r; |
687 | ||
23a177ef | 688 | return 0; |
87f0e418 LP |
689 | } |
690 | ||
a16e1123 LP |
691 | /* Common implementation for multiple backends */ |
692 | int unit_load_nop(Unit *u) { | |
693 | assert(u); | |
694 | ||
695 | if (u->meta.load_state == UNIT_STUB) | |
696 | u->meta.load_state = UNIT_LOADED; | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
87f0e418 LP |
701 | int unit_load(Unit *u) { |
702 | int r; | |
703 | ||
704 | assert(u); | |
705 | ||
706 | if (u->meta.in_load_queue) { | |
707 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
708 | u->meta.in_load_queue = false; | |
709 | } | |
710 | ||
e537352b LP |
711 | if (u->meta.type == _UNIT_TYPE_INVALID) |
712 | return -EINVAL; | |
713 | ||
87f0e418 LP |
714 | if (u->meta.load_state != UNIT_STUB) |
715 | return 0; | |
716 | ||
e537352b LP |
717 | if (UNIT_VTABLE(u)->load) |
718 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 719 | goto fail; |
23a177ef | 720 | |
e537352b | 721 | if (u->meta.load_state == UNIT_STUB) { |
23a177ef LP |
722 | r = -ENOENT; |
723 | goto fail; | |
724 | } | |
725 | ||
23a177ef LP |
726 | assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into); |
727 | ||
728 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 729 | unit_add_to_gc_queue(u); |
87f0e418 | 730 | |
87f0e418 LP |
731 | return 0; |
732 | ||
733 | fail: | |
734 | u->meta.load_state = UNIT_FAILED; | |
c1e1601e | 735 | unit_add_to_dbus_queue(u); |
23a177ef | 736 | |
30de7d85 | 737 | log_debug("Failed to load configuration for %s: %s", u->meta.id, strerror(-r)); |
23a177ef | 738 | |
87f0e418 LP |
739 | return r; |
740 | } | |
741 | ||
742 | /* Errors: | |
d5159713 LP |
743 | * -EBADR: This unit type does not support starting. |
744 | * -EALREADY: Unit is already started. | |
745 | * -EAGAIN: An operation is already in progress. Retry later. | |
746 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
747 | */ |
748 | int unit_start(Unit *u) { | |
749 | UnitActiveState state; | |
750 | ||
751 | assert(u); | |
752 | ||
7898b0cf LP |
753 | /* If this is already (being) started, then this will |
754 | * succeed. Note that this will even succeed if this unit is | |
755 | * not startable by the user. This is relied on to detect when | |
756 | * we need to wait for units and when waiting is finished. */ | |
87f0e418 LP |
757 | state = unit_active_state(u); |
758 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
759 | return -EALREADY; | |
760 | ||
7898b0cf LP |
761 | /* If it is stopped, but we cannot start it, then fail */ |
762 | if (!UNIT_VTABLE(u)->start) | |
763 | return -EBADR; | |
764 | ||
87f0e418 LP |
765 | /* We don't suppress calls to ->start() here when we are |
766 | * already starting, to allow this request to be used as a | |
767 | * "hurry up" call, for example when the unit is in some "auto | |
768 | * restart" state where it waits for a holdoff timer to elapse | |
769 | * before it will start again. */ | |
770 | ||
c1e1601e | 771 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
772 | return UNIT_VTABLE(u)->start(u); |
773 | } | |
774 | ||
775 | bool unit_can_start(Unit *u) { | |
776 | assert(u); | |
777 | ||
778 | return !!UNIT_VTABLE(u)->start; | |
779 | } | |
780 | ||
781 | /* Errors: | |
782 | * -EBADR: This unit type does not support stopping. | |
783 | * -EALREADY: Unit is already stopped. | |
784 | * -EAGAIN: An operation is already in progress. Retry later. | |
785 | */ | |
786 | int unit_stop(Unit *u) { | |
787 | UnitActiveState state; | |
788 | ||
789 | assert(u); | |
790 | ||
87f0e418 LP |
791 | state = unit_active_state(u); |
792 | if (state == UNIT_INACTIVE) | |
793 | return -EALREADY; | |
794 | ||
7898b0cf LP |
795 | if (!UNIT_VTABLE(u)->stop) |
796 | return -EBADR; | |
797 | ||
c1e1601e | 798 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
799 | return UNIT_VTABLE(u)->stop(u); |
800 | } | |
801 | ||
802 | /* Errors: | |
803 | * -EBADR: This unit type does not support reloading. | |
804 | * -ENOEXEC: Unit is not started. | |
805 | * -EAGAIN: An operation is already in progress. Retry later. | |
806 | */ | |
807 | int unit_reload(Unit *u) { | |
808 | UnitActiveState state; | |
809 | ||
810 | assert(u); | |
811 | ||
812 | if (!unit_can_reload(u)) | |
813 | return -EBADR; | |
814 | ||
815 | state = unit_active_state(u); | |
816 | if (unit_active_state(u) == UNIT_ACTIVE_RELOADING) | |
817 | return -EALREADY; | |
818 | ||
819 | if (unit_active_state(u) != UNIT_ACTIVE) | |
820 | return -ENOEXEC; | |
821 | ||
c1e1601e | 822 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
823 | return UNIT_VTABLE(u)->reload(u); |
824 | } | |
825 | ||
826 | bool unit_can_reload(Unit *u) { | |
827 | assert(u); | |
828 | ||
829 | if (!UNIT_VTABLE(u)->reload) | |
830 | return false; | |
831 | ||
832 | if (!UNIT_VTABLE(u)->can_reload) | |
833 | return true; | |
834 | ||
835 | return UNIT_VTABLE(u)->can_reload(u); | |
836 | } | |
837 | ||
f3bff0eb LP |
838 | static void unit_check_uneeded(Unit *u) { |
839 | Iterator i; | |
840 | Unit *other; | |
841 | ||
842 | assert(u); | |
843 | ||
844 | /* If this service shall be shut down when unneeded then do | |
845 | * so. */ | |
846 | ||
847 | if (!u->meta.stop_when_unneeded) | |
848 | return; | |
849 | ||
850 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
851 | return; | |
852 | ||
853 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
854 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
855 | return; | |
856 | ||
9e2f7c11 | 857 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f3bff0eb LP |
858 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
859 | return; | |
860 | ||
861 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i) | |
862 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
863 | return; | |
864 | ||
9e2f7c11 | 865 | log_debug("Service %s is not needed anymore. Stopping.", u->meta.id); |
f3bff0eb LP |
866 | |
867 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
868 | manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL); | |
869 | } | |
870 | ||
87f0e418 LP |
871 | static void retroactively_start_dependencies(Unit *u) { |
872 | Iterator i; | |
873 | Unit *other; | |
874 | ||
875 | assert(u); | |
876 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
877 | ||
878 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
879 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
880 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); | |
881 | ||
9e2f7c11 | 882 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
87f0e418 LP |
883 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
884 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); | |
885 | ||
886 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
887 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
888 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); | |
889 | ||
890 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
891 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
892 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); | |
893 | ||
894 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) | |
895 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
896 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); | |
897 | } | |
898 | ||
899 | static void retroactively_stop_dependencies(Unit *u) { | |
900 | Iterator i; | |
901 | Unit *other; | |
902 | ||
903 | assert(u); | |
904 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
905 | ||
f3bff0eb LP |
906 | if (u->meta.recursive_stop) { |
907 | /* Pull down units need us recursively if enabled */ | |
908 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
909 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
910 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); | |
911 | } | |
912 | ||
913 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
914 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
87f0e418 | 915 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
f3bff0eb | 916 | unit_check_uneeded(other); |
9e2f7c11 | 917 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb LP |
918 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
919 | unit_check_uneeded(other); | |
920 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
921 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
922 | unit_check_uneeded(other); | |
923 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
924 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
925 | unit_check_uneeded(other); | |
9e2f7c11 | 926 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb LP |
927 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
928 | unit_check_uneeded(other); | |
87f0e418 LP |
929 | } |
930 | ||
931 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { | |
a096ed36 | 932 | bool unexpected = false; |
871d7de4 | 933 | timestamp ts; |
a096ed36 | 934 | |
87f0e418 LP |
935 | assert(u); |
936 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
937 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 938 | |
8e471ccd LP |
939 | /* Note that this is called for all low-level state changes, |
940 | * even if they might map to the same high-level | |
941 | * UnitActiveState! That means that ns == os is OK an expected | |
942 | * behaviour here. For example: if a mount point is remounted | |
943 | * this function will be called too and the utmp code below | |
944 | * relies on that! */ | |
87f0e418 | 945 | |
871d7de4 | 946 | timestamp_get(&ts); |
173e3821 LP |
947 | |
948 | if (os == UNIT_INACTIVE && ns != UNIT_INACTIVE) | |
949 | u->meta.inactive_exit_timestamp = ts; | |
950 | else if (os != UNIT_INACTIVE && ns == UNIT_INACTIVE) | |
951 | u->meta.inactive_enter_timestamp = ts; | |
952 | ||
87f0e418 | 953 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 954 | u->meta.active_enter_timestamp = ts; |
87f0e418 | 955 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
173e3821 | 956 | u->meta.active_exit_timestamp = ts; |
87f0e418 | 957 | |
871d7de4 | 958 | timer_unit_notify(u, ns); |
01f78473 | 959 | path_unit_notify(u, ns); |
871d7de4 | 960 | |
87f0e418 LP |
961 | if (u->meta.job) { |
962 | ||
963 | if (u->meta.job->state == JOB_WAITING) | |
964 | ||
965 | /* So we reached a different state for this | |
966 | * job. Let's see if we can run it now if it | |
967 | * failed previously due to EAGAIN. */ | |
c1e1601e | 968 | job_add_to_run_queue(u->meta.job); |
87f0e418 | 969 | |
87f0e418 | 970 | |
b410e6b9 LP |
971 | /* Let's check whether this state change constitutes a |
972 | * finished job, or maybe cotradicts a running job and | |
973 | * hence needs to invalidate jobs. */ | |
87f0e418 | 974 | |
b410e6b9 | 975 | switch (u->meta.job->type) { |
87f0e418 | 976 | |
b410e6b9 LP |
977 | case JOB_START: |
978 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 979 | |
b410e6b9 LP |
980 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
981 | job_finish_and_invalidate(u->meta.job, true); | |
982 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { | |
983 | unexpected = true; | |
984 | job_finish_and_invalidate(u->meta.job, false); | |
985 | } | |
87f0e418 | 986 | |
b410e6b9 | 987 | break; |
87f0e418 | 988 | |
b410e6b9 LP |
989 | case JOB_RELOAD: |
990 | case JOB_RELOAD_OR_START: | |
87f0e418 | 991 | |
b410e6b9 | 992 | if (u->meta.job->state == JOB_RUNNING) { |
a096ed36 | 993 | if (ns == UNIT_ACTIVE) |
87f0e418 | 994 | job_finish_and_invalidate(u->meta.job, true); |
a096ed36 LP |
995 | else if (ns != UNIT_ACTIVATING && ns != UNIT_ACTIVE_RELOADING) { |
996 | unexpected = true; | |
87f0e418 | 997 | job_finish_and_invalidate(u->meta.job, false); |
a096ed36 | 998 | } |
b410e6b9 | 999 | } |
87f0e418 | 1000 | |
b410e6b9 | 1001 | break; |
87f0e418 | 1002 | |
b410e6b9 LP |
1003 | case JOB_STOP: |
1004 | case JOB_RESTART: | |
1005 | case JOB_TRY_RESTART: | |
87f0e418 | 1006 | |
b410e6b9 LP |
1007 | if (ns == UNIT_INACTIVE) |
1008 | job_finish_and_invalidate(u->meta.job, true); | |
1009 | else if (u->meta.job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { | |
1010 | unexpected = true; | |
1011 | job_finish_and_invalidate(u->meta.job, false); | |
1012 | } | |
87f0e418 | 1013 | |
b410e6b9 | 1014 | break; |
87f0e418 | 1015 | |
b410e6b9 LP |
1016 | default: |
1017 | assert_not_reached("Job type unknown"); | |
87f0e418 LP |
1018 | } |
1019 | } | |
1020 | ||
1021 | /* If this state change happened without being requested by a | |
1022 | * job, then let's retroactively start or stop dependencies */ | |
1023 | ||
a096ed36 LP |
1024 | if (unexpected) { |
1025 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1026 | retroactively_start_dependencies(u); | |
1027 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1028 | retroactively_stop_dependencies(u); | |
1029 | } | |
f3bff0eb | 1030 | |
e537352b LP |
1031 | /* Some names are special */ |
1032 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d | 1033 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) { |
e537352b LP |
1034 | /* The bus just might have become available, |
1035 | * hence try to connect to it, if we aren't | |
1036 | * yet connected. */ | |
f278026d LP |
1037 | bus_init_system(u->meta.manager); |
1038 | bus_init_api(u->meta.manager); | |
1039 | } | |
1040 | ||
e537352b LP |
1041 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) |
1042 | /* The syslog daemon just might have become | |
1043 | * available, hence try to connect to it, if | |
1044 | * we aren't yet connected. */ | |
843d2643 | 1045 | log_open(); |
f278026d | 1046 | |
e537352b LP |
1047 | if (u->meta.type == UNIT_MOUNT) |
1048 | /* Another directory became available, let's | |
1049 | * check if that is enough to write our utmp | |
1050 | * entry. */ | |
1051 | manager_write_utmp_reboot(u->meta.manager); | |
1052 | ||
1053 | if (u->meta.type == UNIT_TARGET) | |
1054 | /* A target got activated, maybe this is a runlevel? */ | |
1055 | manager_write_utmp_runlevel(u->meta.manager, u); | |
1056 | ||
1057 | } else if (!UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d LP |
1058 | |
1059 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) | |
e537352b LP |
1060 | /* The syslog daemon might just have |
1061 | * terminated, hence try to disconnect from | |
1062 | * it. */ | |
2882c7ed | 1063 | log_close_syslog(); |
f278026d LP |
1064 | |
1065 | /* We don't care about D-Bus here, since we'll get an | |
1066 | * asynchronous notification for it anyway. */ | |
1067 | } | |
1068 | ||
f3bff0eb LP |
1069 | /* Maybe we finished startup and are now ready for being |
1070 | * stopped because unneeded? */ | |
1071 | unit_check_uneeded(u); | |
c1e1601e LP |
1072 | |
1073 | unit_add_to_dbus_queue(u); | |
701cc384 | 1074 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1075 | } |
1076 | ||
acbb0225 | 1077 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1078 | struct epoll_event ev; |
1079 | ||
1080 | assert(u); | |
1081 | assert(fd >= 0); | |
acbb0225 | 1082 | assert(w); |
ea430986 | 1083 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1084 | |
1085 | zero(ev); | |
acbb0225 | 1086 | ev.data.ptr = w; |
87f0e418 LP |
1087 | ev.events = events; |
1088 | ||
acbb0225 LP |
1089 | if (epoll_ctl(u->meta.manager->epoll_fd, |
1090 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, | |
1091 | fd, | |
1092 | &ev) < 0) | |
1093 | return -errno; | |
87f0e418 | 1094 | |
acbb0225 LP |
1095 | w->fd = fd; |
1096 | w->type = WATCH_FD; | |
ea430986 | 1097 | w->data.unit = u; |
87f0e418 | 1098 | |
acbb0225 | 1099 | return 0; |
87f0e418 LP |
1100 | } |
1101 | ||
acbb0225 | 1102 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1103 | assert(u); |
acbb0225 | 1104 | assert(w); |
87f0e418 | 1105 | |
acbb0225 LP |
1106 | if (w->type == WATCH_INVALID) |
1107 | return; | |
1108 | ||
ea430986 LP |
1109 | assert(w->type == WATCH_FD); |
1110 | assert(w->data.unit == u); | |
acbb0225 LP |
1111 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
1112 | ||
1113 | w->fd = -1; | |
1114 | w->type = WATCH_INVALID; | |
ea430986 | 1115 | w->data.unit = NULL; |
87f0e418 LP |
1116 | } |
1117 | ||
1118 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1119 | assert(u); | |
1120 | assert(pid >= 1); | |
1121 | ||
05e343b7 LP |
1122 | /* Watch a specific PID. We only support one unit watching |
1123 | * each PID for now. */ | |
1124 | ||
87f0e418 LP |
1125 | return hashmap_put(u->meta.manager->watch_pids, UINT32_TO_PTR(pid), u); |
1126 | } | |
1127 | ||
1128 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1129 | assert(u); | |
1130 | assert(pid >= 1); | |
1131 | ||
05e343b7 | 1132 | hashmap_remove_value(u->meta.manager->watch_pids, UINT32_TO_PTR(pid), u); |
87f0e418 LP |
1133 | } |
1134 | ||
acbb0225 | 1135 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1136 | struct itimerspec its; |
acbb0225 | 1137 | int flags, fd; |
87f0e418 LP |
1138 | bool ours; |
1139 | ||
1140 | assert(u); | |
acbb0225 | 1141 | assert(w); |
ea430986 | 1142 | assert(w->type == WATCH_INVALID || (w->type == WATCH_TIMER && w->data.unit == u)); |
87f0e418 LP |
1143 | |
1144 | /* This will try to reuse the old timer if there is one */ | |
1145 | ||
acbb0225 | 1146 | if (w->type == WATCH_TIMER) { |
87f0e418 | 1147 | ours = false; |
acbb0225 | 1148 | fd = w->fd; |
87f0e418 LP |
1149 | } else { |
1150 | ours = true; | |
87f0e418 LP |
1151 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1152 | return -errno; | |
1153 | } | |
1154 | ||
1155 | zero(its); | |
1156 | ||
1157 | if (delay <= 0) { | |
1158 | /* Set absolute time in the past, but not 0, since we | |
1159 | * don't want to disarm the timer */ | |
1160 | its.it_value.tv_sec = 0; | |
1161 | its.it_value.tv_nsec = 1; | |
1162 | ||
1163 | flags = TFD_TIMER_ABSTIME; | |
1164 | } else { | |
1165 | timespec_store(&its.it_value, delay); | |
1166 | flags = 0; | |
1167 | } | |
1168 | ||
1169 | /* This will also flush the elapse counter */ | |
1170 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1171 | goto fail; | |
1172 | ||
acbb0225 LP |
1173 | if (w->type == WATCH_INVALID) { |
1174 | struct epoll_event ev; | |
87f0e418 | 1175 | |
acbb0225 LP |
1176 | zero(ev); |
1177 | ev.data.ptr = w; | |
f94ea366 | 1178 | ev.events = EPOLLIN; |
acbb0225 LP |
1179 | |
1180 | if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) | |
1181 | goto fail; | |
1182 | } | |
1183 | ||
1184 | w->fd = fd; | |
1185 | w->type = WATCH_TIMER; | |
ea430986 | 1186 | w->data.unit = u; |
87f0e418 | 1187 | |
87f0e418 LP |
1188 | return 0; |
1189 | ||
1190 | fail: | |
1191 | if (ours) | |
ea430986 | 1192 | close_nointr_nofail(fd); |
87f0e418 LP |
1193 | |
1194 | return -errno; | |
1195 | } | |
1196 | ||
acbb0225 | 1197 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1198 | assert(u); |
acbb0225 | 1199 | assert(w); |
87f0e418 | 1200 | |
acbb0225 | 1201 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1202 | return; |
1203 | ||
ea430986 | 1204 | assert(w->type == WATCH_TIMER && w->data.unit == u); |
acbb0225 LP |
1205 | |
1206 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
a16e1123 | 1207 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1208 | |
1209 | w->fd = -1; | |
1210 | w->type = WATCH_INVALID; | |
ea430986 | 1211 | w->data.unit = NULL; |
87f0e418 LP |
1212 | } |
1213 | ||
1214 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1215 | assert(u); | |
1216 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1217 | ||
1218 | switch (j) { | |
1219 | ||
1220 | case JOB_VERIFY_ACTIVE: | |
1221 | case JOB_START: | |
1222 | return true; | |
1223 | ||
1224 | case JOB_STOP: | |
1225 | case JOB_RESTART: | |
1226 | case JOB_TRY_RESTART: | |
1227 | return unit_can_start(u); | |
1228 | ||
1229 | case JOB_RELOAD: | |
1230 | return unit_can_reload(u); | |
1231 | ||
1232 | case JOB_RELOAD_OR_START: | |
1233 | return unit_can_reload(u) && unit_can_start(u); | |
1234 | ||
1235 | default: | |
1236 | assert_not_reached("Invalid job type"); | |
1237 | } | |
1238 | } | |
1239 | ||
701cc384 | 1240 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1241 | |
1242 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1243 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1244 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1245 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1246 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1247 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 | 1248 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1249 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 LP |
1250 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
1251 | [UNIT_CONFLICTS] = UNIT_CONFLICTS, | |
1252 | [UNIT_BEFORE] = UNIT_AFTER, | |
701cc384 LP |
1253 | [UNIT_AFTER] = UNIT_BEFORE, |
1254 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, | |
1255 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES | |
87f0e418 | 1256 | }; |
701cc384 | 1257 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1258 | |
1259 | assert(u); | |
1260 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
1261 | assert(inverse_table[d] != _UNIT_DEPENDENCY_INVALID); | |
1262 | assert(other); | |
1263 | ||
1264 | /* We won't allow dependencies on ourselves. We will not | |
1265 | * consider them an error however. */ | |
1266 | if (u == other) | |
1267 | return 0; | |
1268 | ||
9e2f7c11 LP |
1269 | if (UNIT_VTABLE(u)->no_requires && |
1270 | (d == UNIT_REQUIRES || | |
1271 | d == UNIT_REQUIRES_OVERRIDABLE || | |
1272 | d == UNIT_REQUISITE || | |
1273 | d == UNIT_REQUISITE_OVERRIDABLE)) { | |
1274 | return -EINVAL; | |
1275 | } | |
1276 | ||
701cc384 LP |
1277 | if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0 || |
1278 | (r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) | |
87f0e418 LP |
1279 | return r; |
1280 | ||
701cc384 LP |
1281 | if (add_reference) |
1282 | if ((r = set_ensure_allocated(&u->meta.dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || | |
1283 | (r = set_ensure_allocated(&other->meta.dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
1284 | return r; | |
87f0e418 | 1285 | |
701cc384 LP |
1286 | if ((q = set_put(u->meta.dependencies[d], other)) < 0) |
1287 | return q; | |
87f0e418 | 1288 | |
701cc384 LP |
1289 | if ((v = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) { |
1290 | r = v; | |
1291 | goto fail; | |
1292 | } | |
1293 | ||
1294 | if (add_reference) { | |
1295 | if ((w = set_put(u->meta.dependencies[UNIT_REFERENCES], other)) < 0) { | |
1296 | r = w; | |
1297 | goto fail; | |
1298 | } | |
1299 | ||
1300 | if ((r = set_put(other->meta.dependencies[UNIT_REFERENCED_BY], u)) < 0) | |
1301 | goto fail; | |
87f0e418 LP |
1302 | } |
1303 | ||
c1e1601e | 1304 | unit_add_to_dbus_queue(u); |
87f0e418 | 1305 | return 0; |
701cc384 LP |
1306 | |
1307 | fail: | |
1308 | if (q > 0) | |
1309 | set_remove(u->meta.dependencies[d], other); | |
1310 | ||
1311 | if (v > 0) | |
1312 | set_remove(other->meta.dependencies[inverse_table[d]], u); | |
1313 | ||
1314 | if (w > 0) | |
1315 | set_remove(u->meta.dependencies[UNIT_REFERENCES], other); | |
1316 | ||
1317 | return r; | |
87f0e418 | 1318 | } |
0301abf4 | 1319 | |
9e2f7c11 LP |
1320 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1321 | char *s; | |
1322 | ||
1323 | assert(u); | |
1324 | assert(name || path); | |
1325 | ||
1326 | if (!name) | |
1327 | name = file_name_from_path(path); | |
1328 | ||
1329 | if (!unit_name_is_template(name)) { | |
1330 | *p = NULL; | |
1331 | return name; | |
1332 | } | |
1333 | ||
1334 | if (u->meta.instance) | |
1335 | s = unit_name_replace_instance(name, u->meta.instance); | |
1336 | else { | |
1337 | char *i; | |
1338 | ||
1339 | if (!(i = unit_name_to_prefix(u->meta.id))) | |
1340 | return NULL; | |
1341 | ||
1342 | s = unit_name_replace_instance(name, i); | |
1343 | free(i); | |
1344 | } | |
1345 | ||
1346 | if (!s) | |
1347 | return NULL; | |
1348 | ||
1349 | *p = s; | |
1350 | return s; | |
1351 | } | |
1352 | ||
701cc384 | 1353 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1354 | Unit *other; |
1355 | int r; | |
9e2f7c11 | 1356 | char *s; |
09b6b09f | 1357 | |
9e2f7c11 LP |
1358 | assert(u); |
1359 | assert(name || path); | |
09b6b09f | 1360 | |
9e2f7c11 LP |
1361 | if (!(name = resolve_template(u, name, path, &s))) |
1362 | return -ENOMEM; | |
09b6b09f | 1363 | |
9e2f7c11 LP |
1364 | if ((r = manager_load_unit(u->meta.manager, name, path, &other)) < 0) |
1365 | goto finish; | |
1366 | ||
701cc384 | 1367 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1368 | |
1369 | finish: | |
1370 | free(s); | |
1371 | return r; | |
09b6b09f LP |
1372 | } |
1373 | ||
701cc384 | 1374 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1375 | Unit *other; |
1376 | int r; | |
9e2f7c11 | 1377 | char *s; |
bd77d0fc | 1378 | |
9e2f7c11 LP |
1379 | assert(u); |
1380 | assert(name || path); | |
bd77d0fc | 1381 | |
9e2f7c11 LP |
1382 | if (!(name = resolve_template(u, name, path, &s))) |
1383 | return -ENOMEM; | |
bd77d0fc | 1384 | |
9e2f7c11 LP |
1385 | if ((r = manager_load_unit(u->meta.manager, name, path, &other)) < 0) |
1386 | goto finish; | |
1387 | ||
701cc384 | 1388 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1389 | |
1390 | finish: | |
1391 | free(s); | |
1392 | return r; | |
bd77d0fc LP |
1393 | } |
1394 | ||
0301abf4 LP |
1395 | int set_unit_path(const char *p) { |
1396 | char *cwd, *c; | |
1397 | int r; | |
1398 | ||
1399 | /* This is mostly for debug purposes */ | |
1400 | ||
1401 | if (path_is_absolute(p)) { | |
1402 | if (!(c = strdup(p))) | |
1403 | return -ENOMEM; | |
1404 | } else { | |
1405 | if (!(cwd = get_current_dir_name())) | |
1406 | return -errno; | |
1407 | ||
1408 | r = asprintf(&c, "%s/%s", cwd, p); | |
1409 | free(cwd); | |
1410 | ||
1411 | if (r < 0) | |
1412 | return -ENOMEM; | |
1413 | } | |
1414 | ||
036643a2 | 1415 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1416 | r = -errno; |
1417 | free(c); | |
1418 | return r; | |
1419 | } | |
1420 | ||
1421 | return 0; | |
1422 | } | |
88066b3a | 1423 | |
ea430986 LP |
1424 | char *unit_dbus_path(Unit *u) { |
1425 | char *p, *e; | |
1426 | ||
1427 | assert(u); | |
1428 | ||
9e2f7c11 | 1429 | if (!(e = bus_path_escape(u->meta.id))) |
ea430986 LP |
1430 | return NULL; |
1431 | ||
1432 | if (asprintf(&p, "/org/freedesktop/systemd1/unit/%s", e) < 0) { | |
1433 | free(e); | |
1434 | return NULL; | |
1435 | } | |
1436 | ||
1437 | free(e); | |
1438 | return p; | |
1439 | } | |
1440 | ||
8e274523 LP |
1441 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
1442 | CGroupBonding *l; | |
1443 | int r; | |
1444 | ||
1445 | assert(u); | |
1446 | assert(b); | |
1447 | assert(b->path); | |
1448 | ||
1449 | /* Ensure this hasn't been added yet */ | |
1450 | assert(!b->unit); | |
1451 | ||
1452 | l = hashmap_get(u->meta.manager->cgroup_bondings, b->path); | |
1453 | LIST_PREPEND(CGroupBonding, by_path, l, b); | |
1454 | ||
1455 | if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) { | |
1456 | LIST_REMOVE(CGroupBonding, by_path, l, b); | |
1457 | return r; | |
1458 | } | |
1459 | ||
1460 | LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b); | |
1461 | b->unit = u; | |
1462 | ||
1463 | return 0; | |
1464 | } | |
1465 | ||
013b87c0 LP |
1466 | static char *default_cgroup_path(Unit *u) { |
1467 | char *p; | |
4f2d528d | 1468 | int r; |
013b87c0 LP |
1469 | |
1470 | assert(u); | |
1471 | ||
4f2d528d LP |
1472 | if (u->meta.instance) { |
1473 | char *t; | |
013b87c0 | 1474 | |
4f2d528d LP |
1475 | if (!(t = unit_name_template(u->meta.id))) |
1476 | return NULL; | |
1477 | ||
1478 | r = asprintf(&p, "%s/%s/%s", u->meta.manager->cgroup_hierarchy, t, u->meta.instance); | |
1479 | free(t); | |
1480 | } else | |
1481 | r = asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, u->meta.id); | |
1482 | ||
1483 | return r < 0 ? NULL : p; | |
013b87c0 LP |
1484 | } |
1485 | ||
8e274523 LP |
1486 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
1487 | size_t n; | |
013b87c0 LP |
1488 | char *controller = NULL, *path = NULL; |
1489 | CGroupBonding *b = NULL; | |
8e274523 LP |
1490 | int r; |
1491 | ||
1492 | assert(u); | |
1493 | assert(name); | |
1494 | ||
1495 | /* Detect controller name */ | |
013b87c0 | 1496 | n = strcspn(name, ":"); |
8e274523 | 1497 | |
013b87c0 LP |
1498 | if (name[n] == 0 || |
1499 | (name[n] == ':' && name[n+1] == 0)) { | |
8e274523 | 1500 | |
013b87c0 | 1501 | /* Only controller name, no path? */ |
8e274523 | 1502 | |
013b87c0 LP |
1503 | if (!(path = default_cgroup_path(u))) |
1504 | return -ENOMEM; | |
8e274523 | 1505 | |
013b87c0 LP |
1506 | } else { |
1507 | const char *p; | |
8e274523 | 1508 | |
013b87c0 LP |
1509 | /* Controller name, and path. */ |
1510 | p = name+n+1; | |
8e274523 | 1511 | |
013b87c0 LP |
1512 | if (!path_is_absolute(p)) |
1513 | return -EINVAL; | |
1514 | ||
1515 | if (!(path = strdup(p))) | |
1516 | return -ENOMEM; | |
8e274523 LP |
1517 | } |
1518 | ||
013b87c0 LP |
1519 | if (n > 0) |
1520 | controller = strndup(name, n); | |
1521 | else | |
1522 | controller = strdup(u->meta.manager->cgroup_controller); | |
1523 | ||
1524 | if (!controller) { | |
1525 | r = -ENOMEM; | |
1526 | goto fail; | |
8e274523 LP |
1527 | } |
1528 | ||
013b87c0 LP |
1529 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) { |
1530 | r = -EEXIST; | |
1531 | goto fail; | |
1532 | } | |
8e274523 | 1533 | |
013b87c0 | 1534 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1535 | r = -ENOMEM; |
1536 | goto fail; | |
1537 | } | |
1538 | ||
013b87c0 LP |
1539 | b->controller = controller; |
1540 | b->path = path; | |
8e274523 LP |
1541 | b->only_us = false; |
1542 | b->clean_up = false; | |
1543 | ||
1544 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1545 | goto fail; | |
1546 | ||
1547 | return 0; | |
1548 | ||
1549 | fail: | |
013b87c0 LP |
1550 | free(path); |
1551 | free(controller); | |
8e274523 LP |
1552 | free(b); |
1553 | ||
1554 | return r; | |
1555 | } | |
1556 | ||
1557 | int unit_add_default_cgroup(Unit *u) { | |
1558 | CGroupBonding *b; | |
1559 | int r = -ENOMEM; | |
1560 | ||
1561 | assert(u); | |
1562 | ||
1563 | /* Adds in the default cgroup data, if it wasn't specified yet */ | |
1564 | ||
1565 | if (unit_get_default_cgroup(u)) | |
1566 | return 0; | |
1567 | ||
1568 | if (!(b = new0(CGroupBonding, 1))) | |
1569 | return -ENOMEM; | |
1570 | ||
1571 | if (!(b->controller = strdup(u->meta.manager->cgroup_controller))) | |
1572 | goto fail; | |
1573 | ||
013b87c0 | 1574 | if (!(b->path = default_cgroup_path(u))) |
8e274523 LP |
1575 | goto fail; |
1576 | ||
1577 | b->clean_up = true; | |
1578 | b->only_us = true; | |
1579 | ||
1580 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1581 | goto fail; | |
1582 | ||
1583 | return 0; | |
1584 | ||
1585 | fail: | |
1586 | free(b->path); | |
1587 | free(b->controller); | |
1588 | free(b); | |
1589 | ||
1590 | return r; | |
1591 | } | |
1592 | ||
1593 | CGroupBonding* unit_get_default_cgroup(Unit *u) { | |
1594 | assert(u); | |
1595 | ||
1596 | return cgroup_bonding_find_list(u->meta.cgroup_bondings, u->meta.manager->cgroup_controller); | |
1597 | } | |
1598 | ||
f6ff8c29 LP |
1599 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
1600 | char *t; | |
1601 | int r; | |
1602 | ||
1603 | assert(u); | |
1604 | assert(type); | |
1605 | assert(_found); | |
1606 | ||
9e2f7c11 | 1607 | if (!(t = unit_name_change_suffix(u->meta.id, type))) |
f6ff8c29 LP |
1608 | return -ENOMEM; |
1609 | ||
1610 | assert(!unit_has_name(u, t)); | |
1611 | ||
9e2f7c11 | 1612 | r = manager_load_unit(u->meta.manager, t, NULL, _found); |
f6ff8c29 LP |
1613 | free(t); |
1614 | ||
9e2f7c11 | 1615 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
1616 | |
1617 | return r; | |
1618 | } | |
1619 | ||
a16e1123 LP |
1620 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
1621 | Unit *found; | |
1622 | char *t; | |
1623 | ||
1624 | assert(u); | |
1625 | assert(type); | |
1626 | assert(_found); | |
1627 | ||
1628 | if (!(t = unit_name_change_suffix(u->meta.id, type))) | |
1629 | return -ENOMEM; | |
1630 | ||
1631 | assert(!unit_has_name(u, t)); | |
1632 | ||
1633 | found = manager_get_unit(u->meta.manager, t); | |
1634 | free(t); | |
1635 | ||
1636 | if (!found) | |
1637 | return -ENOENT; | |
1638 | ||
1639 | *_found = found; | |
1640 | return 0; | |
1641 | } | |
1642 | ||
9e2f7c11 LP |
1643 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
1644 | Unit *u = userdata; | |
1645 | assert(u); | |
1646 | ||
1647 | return unit_name_to_prefix_and_instance(u->meta.id); | |
1648 | } | |
1649 | ||
1650 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
1651 | Unit *u = userdata; | |
1652 | assert(u); | |
1653 | ||
1654 | return unit_name_to_prefix(u->meta.id); | |
1655 | } | |
1656 | ||
1657 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
1658 | Unit *u = userdata; | |
1659 | char *p, *r; | |
1660 | ||
1661 | assert(u); | |
1662 | ||
1663 | if (!(p = unit_name_to_prefix(u->meta.id))) | |
1664 | return NULL; | |
1665 | ||
1666 | r = unit_name_unescape(p); | |
1667 | free(p); | |
1668 | ||
1669 | return r; | |
1670 | } | |
1671 | ||
1672 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
1673 | Unit *u = userdata; | |
1674 | assert(u); | |
1675 | ||
1676 | if (u->meta.instance) | |
1677 | return unit_name_unescape(u->meta.instance); | |
1678 | ||
1679 | return strdup(""); | |
1680 | } | |
1681 | ||
1682 | char *unit_name_printf(Unit *u, const char* format) { | |
1683 | ||
1684 | /* | |
1685 | * This will use the passed string as format string and | |
1686 | * replace the following specifiers: | |
1687 | * | |
1688 | * %n: the full id of the unit (foo@bar.waldo) | |
1689 | * %N: the id of the unit without the suffix (foo@bar) | |
1690 | * %p: the prefix (foo) | |
1691 | * %i: the instance (bar) | |
1692 | */ | |
1693 | ||
1694 | const Specifier table[] = { | |
1695 | { 'n', specifier_string, u->meta.id }, | |
1696 | { 'N', specifier_prefix_and_instance, NULL }, | |
1697 | { 'p', specifier_prefix, NULL }, | |
1698 | { 'i', specifier_string, u->meta.instance }, | |
1699 | { 0, NULL, NULL } | |
1700 | }; | |
1701 | ||
1702 | assert(u); | |
1703 | assert(format); | |
1704 | ||
1705 | return specifier_printf(format, table, u); | |
1706 | } | |
1707 | ||
1708 | char *unit_full_printf(Unit *u, const char *format) { | |
1709 | ||
1710 | /* This is similar to unit_name_printf() but also supports | |
1711 | * unescaping */ | |
1712 | ||
1713 | const Specifier table[] = { | |
1714 | { 'n', specifier_string, u->meta.id }, | |
1715 | { 'N', specifier_prefix_and_instance, NULL }, | |
1716 | { 'p', specifier_prefix, NULL }, | |
1717 | { 'P', specifier_prefix_unescaped, NULL }, | |
1718 | { 'i', specifier_string, u->meta.instance }, | |
1719 | { 'I', specifier_instance_unescaped, NULL }, | |
1720 | { 0, NULL, NULL } | |
1721 | }; | |
1722 | ||
1723 | assert(u); | |
1724 | assert(format); | |
1725 | ||
1726 | return specifier_printf(format, table, u); | |
1727 | } | |
1728 | ||
1729 | char **unit_full_printf_strv(Unit *u, char **l) { | |
1730 | size_t n; | |
1731 | char **r, **i, **j; | |
1732 | ||
1733 | /* Applies unit_full_printf to every entry in l */ | |
1734 | ||
1735 | assert(u); | |
1736 | ||
1737 | n = strv_length(l); | |
1738 | if (!(r = new(char*, n+1))) | |
1739 | return NULL; | |
1740 | ||
1741 | for (i = l, j = r; *i; i++, j++) | |
1742 | if (!(*j = unit_full_printf(u, *i))) | |
1743 | goto fail; | |
1744 | ||
1745 | *j = NULL; | |
1746 | return r; | |
1747 | ||
1748 | fail: | |
1749 | j--; | |
1750 | while (j >= r) | |
1751 | free(*j); | |
1752 | ||
1753 | free(r); | |
1754 | ||
1755 | return NULL; | |
1756 | } | |
1757 | ||
05e343b7 LP |
1758 | int unit_watch_bus_name(Unit *u, const char *name) { |
1759 | assert(u); | |
1760 | assert(name); | |
1761 | ||
1762 | /* Watch a specific name on the bus. We only support one unit | |
1763 | * watching each name for now. */ | |
1764 | ||
1765 | return hashmap_put(u->meta.manager->watch_bus, name, u); | |
1766 | } | |
1767 | ||
1768 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
1769 | assert(u); | |
1770 | assert(name); | |
1771 | ||
1772 | hashmap_remove_value(u->meta.manager->watch_bus, name, u); | |
1773 | } | |
1774 | ||
a16e1123 LP |
1775 | bool unit_can_serialize(Unit *u) { |
1776 | assert(u); | |
1777 | ||
1778 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
1779 | } | |
1780 | ||
1781 | int unit_serialize(Unit *u, FILE *f, FDSet *fds) { | |
1782 | int r; | |
1783 | ||
1784 | assert(u); | |
1785 | assert(f); | |
1786 | assert(fds); | |
1787 | ||
1788 | if (!unit_can_serialize(u)) | |
1789 | return 0; | |
1790 | ||
1791 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
1792 | return r; | |
1793 | ||
cca098b0 LP |
1794 | if (u->meta.job) |
1795 | unit_serialize_item(u, f, "job", job_type_to_string(u->meta.job->type)); | |
1796 | ||
a16e1123 LP |
1797 | /* End marker */ |
1798 | fputc('\n', f); | |
1799 | return 0; | |
1800 | } | |
1801 | ||
1802 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
1803 | va_list ap; | |
1804 | ||
1805 | assert(u); | |
1806 | assert(f); | |
1807 | assert(key); | |
1808 | assert(format); | |
1809 | ||
1810 | fputs(key, f); | |
1811 | fputc('=', f); | |
1812 | ||
1813 | va_start(ap, format); | |
1814 | vfprintf(f, format, ap); | |
1815 | va_end(ap); | |
1816 | ||
1817 | fputc('\n', f); | |
1818 | } | |
1819 | ||
1820 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
1821 | assert(u); | |
1822 | assert(f); | |
1823 | assert(key); | |
1824 | assert(value); | |
1825 | ||
1826 | fprintf(f, "%s=%s\n", key, value); | |
1827 | } | |
1828 | ||
1829 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
1830 | int r; | |
1831 | ||
1832 | assert(u); | |
1833 | assert(f); | |
1834 | assert(fds); | |
1835 | ||
1836 | if (!unit_can_serialize(u)) | |
1837 | return 0; | |
1838 | ||
1839 | for (;;) { | |
1840 | char line[1024], *l, *v; | |
1841 | size_t k; | |
1842 | ||
1843 | if (!fgets(line, sizeof(line), f)) { | |
1844 | if (feof(f)) | |
1845 | return 0; | |
1846 | return -errno; | |
1847 | } | |
1848 | ||
1849 | l = strstrip(line); | |
1850 | ||
1851 | /* End marker */ | |
1852 | if (l[0] == 0) | |
1853 | return 0; | |
1854 | ||
1855 | k = strcspn(l, "="); | |
1856 | ||
1857 | if (l[k] == '=') { | |
1858 | l[k] = 0; | |
1859 | v = l+k+1; | |
1860 | } else | |
1861 | v = l+k; | |
1862 | ||
cca098b0 LP |
1863 | if (streq(l, "job")) { |
1864 | JobType type; | |
1865 | ||
1866 | if ((type = job_type_from_string(v)) < 0) | |
1867 | log_debug("Failed to parse job type value %s", v); | |
1868 | else | |
1869 | u->meta.deserialized_job = type; | |
1870 | ||
1871 | continue; | |
1872 | } | |
1873 | ||
a16e1123 LP |
1874 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
1875 | return r; | |
1876 | } | |
1877 | } | |
1878 | ||
6e2ef85b LP |
1879 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
1880 | Unit *device; | |
1881 | char *e; | |
1882 | int r; | |
1883 | ||
1884 | assert(u); | |
1885 | ||
1886 | if (!what) | |
1887 | return 0; | |
1888 | ||
1889 | /* Adds in links to the device node that this unit is based on */ | |
1890 | ||
8407a5d0 | 1891 | if (!is_device_path(what)) |
6e2ef85b LP |
1892 | return 0; |
1893 | ||
1894 | if (!(e = unit_name_build_escape(what+1, NULL, ".device"))) | |
1895 | return -ENOMEM; | |
1896 | ||
1897 | r = manager_load_unit(u->meta.manager, e, NULL, &device); | |
1898 | free(e); | |
1899 | ||
1900 | if (r < 0) | |
1901 | return r; | |
1902 | ||
1903 | if ((r = unit_add_dependency(u, UNIT_AFTER, device, true)) < 0) | |
1904 | return r; | |
1905 | ||
1906 | if ((r = unit_add_dependency(u, UNIT_REQUIRES, device, true)) < 0) | |
1907 | return r; | |
1908 | ||
1909 | if (wants) | |
1910 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
1911 | return r; | |
1912 | ||
1913 | return 0; | |
1914 | } | |
a16e1123 | 1915 | |
cca098b0 LP |
1916 | int unit_coldplug(Unit *u) { |
1917 | int r; | |
1918 | ||
1919 | assert(u); | |
1920 | ||
1921 | if (UNIT_VTABLE(u)->coldplug) | |
1922 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
1923 | return r; | |
1924 | ||
1925 | if (u->meta.deserialized_job >= 0) { | |
1926 | if ((r = manager_add_job(u->meta.manager, u->meta.deserialized_job, u, JOB_FAIL, false, NULL)) < 0) | |
1927 | return r; | |
1928 | ||
1929 | u->meta.deserialized_job = _JOB_TYPE_INVALID; | |
1930 | } | |
1931 | ||
1932 | return 0; | |
1933 | } | |
1934 | ||
94f04347 LP |
1935 | static const char* const unit_type_table[_UNIT_TYPE_MAX] = { |
1936 | [UNIT_SERVICE] = "service", | |
1937 | [UNIT_TIMER] = "timer", | |
1938 | [UNIT_SOCKET] = "socket", | |
1939 | [UNIT_TARGET] = "target", | |
1940 | [UNIT_DEVICE] = "device", | |
1941 | [UNIT_MOUNT] = "mount", | |
1942 | [UNIT_AUTOMOUNT] = "automount", | |
07b0b134 ML |
1943 | [UNIT_SNAPSHOT] = "snapshot", |
1944 | [UNIT_SWAP] = "swap" | |
94f04347 LP |
1945 | }; |
1946 | ||
1947 | DEFINE_STRING_TABLE_LOOKUP(unit_type, UnitType); | |
1948 | ||
1949 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { | |
1950 | [UNIT_STUB] = "stub", | |
1951 | [UNIT_LOADED] = "loaded", | |
23a177ef LP |
1952 | [UNIT_FAILED] = "failed", |
1953 | [UNIT_MERGED] = "merged" | |
94f04347 LP |
1954 | }; |
1955 | ||
1956 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
1957 | ||
1958 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
1959 | [UNIT_ACTIVE] = "active", | |
1960 | [UNIT_INACTIVE] = "inactive", | |
1961 | [UNIT_ACTIVATING] = "activating", | |
1962 | [UNIT_DEACTIVATING] = "deactivating" | |
1963 | }; | |
1964 | ||
1965 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
1966 | ||
1967 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
1968 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 1969 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 LP |
1970 | [UNIT_WANTS] = "Wants", |
1971 | [UNIT_REQUISITE] = "Requisite", | |
9e2f7c11 | 1972 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
94f04347 | 1973 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 1974 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 LP |
1975 | [UNIT_WANTED_BY] = "WantedBy", |
1976 | [UNIT_CONFLICTS] = "Conflicts", | |
1977 | [UNIT_BEFORE] = "Before", | |
1978 | [UNIT_AFTER] = "After", | |
701cc384 LP |
1979 | [UNIT_REFERENCES] = "References", |
1980 | [UNIT_REFERENCED_BY] = "ReferencedBy" | |
94f04347 LP |
1981 | }; |
1982 | ||
1983 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); | |
50159e6a LP |
1984 | |
1985 | static const char* const kill_mode_table[_KILL_MODE_MAX] = { | |
80876c20 | 1986 | [KILL_CONTROL_GROUP] = "control-group", |
50159e6a | 1987 | [KILL_PROCESS_GROUP] = "process-group", |
80876c20 LP |
1988 | [KILL_PROCESS] = "process", |
1989 | [KILL_NONE] = "none" | |
50159e6a LP |
1990 | }; |
1991 | ||
1992 | DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode); |