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