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