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