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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
87f0e418 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
87f0e418 LP |
22 | #include <assert.h> |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <sys/epoll.h> | |
26 | #include <sys/timerfd.h> | |
27 | #include <sys/poll.h> | |
0301abf4 LP |
28 | #include <stdlib.h> |
29 | #include <unistd.h> | |
45fb0699 | 30 | #include <sys/stat.h> |
87f0e418 | 31 | |
877d54e9 LP |
32 | #include "systemd/sd-id128.h" |
33 | #include "systemd/sd-messages.h" | |
87f0e418 LP |
34 | #include "set.h" |
35 | #include "unit.h" | |
36 | #include "macro.h" | |
37 | #include "strv.h" | |
9eb977db | 38 | #include "path-util.h" |
87f0e418 LP |
39 | #include "load-fragment.h" |
40 | #include "load-dropin.h" | |
41 | #include "log.h" | |
9e2f7c11 | 42 | #include "unit-name.h" |
4139c1b2 | 43 | #include "dbus-unit.h" |
514f4ef5 | 44 | #include "special.h" |
c6c18be3 | 45 | #include "cgroup-util.h" |
4927fcae | 46 | #include "missing.h" |
ab1f0633 | 47 | #include "cgroup-attr.h" |
71645aca | 48 | #include "mkdir.h" |
87f0e418 LP |
49 | |
50 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
51 | [UNIT_SERVICE] = &service_vtable, | |
52 | [UNIT_TIMER] = &timer_vtable, | |
53 | [UNIT_SOCKET] = &socket_vtable, | |
54 | [UNIT_TARGET] = &target_vtable, | |
55 | [UNIT_DEVICE] = &device_vtable, | |
56 | [UNIT_MOUNT] = &mount_vtable, | |
57 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 58 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
59 | [UNIT_SWAP] = &swap_vtable, |
60 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
61 | }; |
62 | ||
7d17cfbc | 63 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
64 | Unit *u; |
65 | ||
66 | assert(m); | |
ac155bb8 | 67 | assert(size >= sizeof(Unit)); |
87f0e418 | 68 | |
7d17cfbc MS |
69 | u = malloc0(size); |
70 | if (!u) | |
87f0e418 LP |
71 | return NULL; |
72 | ||
ac155bb8 MS |
73 | u->names = set_new(string_hash_func, string_compare_func); |
74 | if (!u->names) { | |
87f0e418 LP |
75 | free(u); |
76 | return NULL; | |
77 | } | |
78 | ||
ac155bb8 MS |
79 | u->manager = m; |
80 | u->type = _UNIT_TYPE_INVALID; | |
81 | u->deserialized_job = _JOB_TYPE_INVALID; | |
82 | u->default_dependencies = true; | |
83 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
87f0e418 LP |
84 | |
85 | return u; | |
86 | } | |
87 | ||
f278026d LP |
88 | bool unit_has_name(Unit *u, const char *name) { |
89 | assert(u); | |
90 | assert(name); | |
91 | ||
ac155bb8 | 92 | return !!set_get(u->names, (char*) name); |
f278026d LP |
93 | } |
94 | ||
87f0e418 LP |
95 | int unit_add_name(Unit *u, const char *text) { |
96 | UnitType t; | |
276c3e78 | 97 | char *s, *i = NULL; |
87f0e418 LP |
98 | int r; |
99 | ||
100 | assert(u); | |
101 | assert(text); | |
102 | ||
9e2f7c11 | 103 | if (unit_name_is_template(text)) { |
ac155bb8 | 104 | if (!u->instance) |
9e2f7c11 | 105 | return -EINVAL; |
87f0e418 | 106 | |
ac155bb8 | 107 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
108 | } else |
109 | s = strdup(text); | |
87f0e418 | 110 | |
9e2f7c11 LP |
111 | if (!s) |
112 | return -ENOMEM; | |
87f0e418 | 113 | |
b9c0d441 | 114 | if (!unit_name_is_valid(s, false)) { |
9e2f7c11 LP |
115 | r = -EINVAL; |
116 | goto fail; | |
117 | } | |
e537352b | 118 | |
9e2f7c11 | 119 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 120 | |
ac155bb8 | 121 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) { |
9e2f7c11 LP |
122 | r = -EINVAL; |
123 | goto fail; | |
124 | } | |
87f0e418 | 125 | |
9e2f7c11 LP |
126 | if ((r = unit_name_to_instance(s, &i)) < 0) |
127 | goto fail; | |
87f0e418 | 128 | |
796ba554 LP |
129 | if (i && unit_vtable[t]->no_instances) { |
130 | r = -EINVAL; | |
9e2f7c11 | 131 | goto fail; |
796ba554 | 132 | } |
9e2f7c11 | 133 | |
276c3e78 LP |
134 | /* Ensure that this unit is either instanced or not instanced, |
135 | * but not both. */ | |
ac155bb8 | 136 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) { |
9e2f7c11 LP |
137 | r = -EINVAL; |
138 | goto fail; | |
139 | } | |
140 | ||
141 | if (unit_vtable[t]->no_alias && | |
ac155bb8 MS |
142 | !set_isempty(u->names) && |
143 | !set_get(u->names, s)) { | |
9e2f7c11 LP |
144 | r = -EEXIST; |
145 | goto fail; | |
146 | } | |
147 | ||
ac155bb8 | 148 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) { |
4f0f902f LP |
149 | r = -E2BIG; |
150 | goto fail; | |
151 | } | |
152 | ||
ac155bb8 | 153 | if ((r = set_put(u->names, s)) < 0) { |
9e2f7c11 LP |
154 | if (r == -EEXIST) |
155 | r = 0; | |
156 | goto fail; | |
87f0e418 LP |
157 | } |
158 | ||
ac155bb8 MS |
159 | if ((r = hashmap_put(u->manager->units, s, u)) < 0) { |
160 | set_remove(u->names, s); | |
9e2f7c11 | 161 | goto fail; |
87f0e418 LP |
162 | } |
163 | ||
ac155bb8 | 164 | if (u->type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 165 | |
ac155bb8 MS |
166 | u->type = t; |
167 | u->id = s; | |
168 | u->instance = i; | |
9e2f7c11 | 169 | |
ac155bb8 | 170 | LIST_PREPEND(Unit, units_by_type, u->manager->units_by_type[t], u); |
e537352b LP |
171 | |
172 | if (UNIT_VTABLE(u)->init) | |
173 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
174 | } else |
175 | free(i); | |
87f0e418 | 176 | |
c1e1601e | 177 | unit_add_to_dbus_queue(u); |
87f0e418 | 178 | return 0; |
9e2f7c11 LP |
179 | |
180 | fail: | |
181 | free(s); | |
182 | free(i); | |
183 | ||
184 | return r; | |
87f0e418 LP |
185 | } |
186 | ||
0ae97ec1 | 187 | int unit_choose_id(Unit *u, const char *name) { |
276c3e78 LP |
188 | char *s, *t = NULL, *i; |
189 | int r; | |
0ae97ec1 LP |
190 | |
191 | assert(u); | |
192 | assert(name); | |
193 | ||
9e2f7c11 LP |
194 | if (unit_name_is_template(name)) { |
195 | ||
ac155bb8 | 196 | if (!u->instance) |
9e2f7c11 LP |
197 | return -EINVAL; |
198 | ||
ac155bb8 | 199 | if (!(t = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
200 | return -ENOMEM; |
201 | ||
202 | name = t; | |
203 | } | |
204 | ||
0ae97ec1 | 205 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 206 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 207 | free(t); |
0ae97ec1 | 208 | |
9e2f7c11 | 209 | if (!s) |
0ae97ec1 LP |
210 | return -ENOENT; |
211 | ||
276c3e78 LP |
212 | if ((r = unit_name_to_instance(s, &i)) < 0) |
213 | return r; | |
214 | ||
ac155bb8 | 215 | u->id = s; |
276c3e78 | 216 | |
ac155bb8 MS |
217 | free(u->instance); |
218 | u->instance = i; | |
276c3e78 | 219 | |
c1e1601e | 220 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 221 | |
0ae97ec1 LP |
222 | return 0; |
223 | } | |
224 | ||
f50e0a01 LP |
225 | int unit_set_description(Unit *u, const char *description) { |
226 | char *s; | |
227 | ||
228 | assert(u); | |
229 | ||
230 | if (!(s = strdup(description))) | |
231 | return -ENOMEM; | |
232 | ||
ac155bb8 MS |
233 | free(u->description); |
234 | u->description = s; | |
c1e1601e LP |
235 | |
236 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
237 | return 0; |
238 | } | |
239 | ||
701cc384 LP |
240 | bool unit_check_gc(Unit *u) { |
241 | assert(u); | |
242 | ||
ac155bb8 | 243 | if (u->load_state == UNIT_STUB) |
b86d44e5 LP |
244 | return true; |
245 | ||
701cc384 LP |
246 | if (UNIT_VTABLE(u)->no_gc) |
247 | return true; | |
248 | ||
ac155bb8 | 249 | if (u->no_gc) |
6c073082 LP |
250 | return true; |
251 | ||
ac155bb8 | 252 | if (u->job) |
701cc384 LP |
253 | return true; |
254 | ||
e0209d83 MS |
255 | if (u->nop_job) |
256 | return true; | |
257 | ||
701cc384 LP |
258 | if (unit_active_state(u) != UNIT_INACTIVE) |
259 | return true; | |
260 | ||
9d576438 LP |
261 | if (u->refs) |
262 | return true; | |
263 | ||
701cc384 LP |
264 | if (UNIT_VTABLE(u)->check_gc) |
265 | if (UNIT_VTABLE(u)->check_gc(u)) | |
266 | return true; | |
267 | ||
268 | return false; | |
269 | } | |
270 | ||
87f0e418 LP |
271 | void unit_add_to_load_queue(Unit *u) { |
272 | assert(u); | |
ac155bb8 | 273 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 274 | |
ac155bb8 | 275 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
276 | return; |
277 | ||
ac155bb8 MS |
278 | LIST_PREPEND(Unit, load_queue, u->manager->load_queue, u); |
279 | u->in_load_queue = true; | |
87f0e418 LP |
280 | } |
281 | ||
23a177ef LP |
282 | void unit_add_to_cleanup_queue(Unit *u) { |
283 | assert(u); | |
284 | ||
ac155bb8 | 285 | if (u->in_cleanup_queue) |
23a177ef LP |
286 | return; |
287 | ||
ac155bb8 MS |
288 | LIST_PREPEND(Unit, cleanup_queue, u->manager->cleanup_queue, u); |
289 | u->in_cleanup_queue = true; | |
23a177ef LP |
290 | } |
291 | ||
701cc384 LP |
292 | void unit_add_to_gc_queue(Unit *u) { |
293 | assert(u); | |
294 | ||
ac155bb8 | 295 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
296 | return; |
297 | ||
298 | if (unit_check_gc(u)) | |
299 | return; | |
300 | ||
ac155bb8 MS |
301 | LIST_PREPEND(Unit, gc_queue, u->manager->gc_queue, u); |
302 | u->in_gc_queue = true; | |
701cc384 | 303 | |
ac155bb8 | 304 | u->manager->n_in_gc_queue ++; |
701cc384 | 305 | |
ac155bb8 MS |
306 | if (u->manager->gc_queue_timestamp <= 0) |
307 | u->manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
701cc384 LP |
308 | } |
309 | ||
c1e1601e LP |
310 | void unit_add_to_dbus_queue(Unit *u) { |
311 | assert(u); | |
ac155bb8 | 312 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 313 | |
ac155bb8 | 314 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
315 | return; |
316 | ||
a567261a | 317 | /* Shortcut things if nobody cares */ |
ac155bb8 MS |
318 | if (!bus_has_subscriber(u->manager)) { |
319 | u->sent_dbus_new_signal = true; | |
94b6dfa2 LP |
320 | return; |
321 | } | |
322 | ||
ac155bb8 MS |
323 | LIST_PREPEND(Unit, dbus_queue, u->manager->dbus_unit_queue, u); |
324 | u->in_dbus_queue = true; | |
c1e1601e LP |
325 | } |
326 | ||
87f0e418 LP |
327 | static void bidi_set_free(Unit *u, Set *s) { |
328 | Iterator i; | |
329 | Unit *other; | |
330 | ||
331 | assert(u); | |
332 | ||
333 | /* Frees the set and makes sure we are dropped from the | |
334 | * inverse pointers */ | |
335 | ||
336 | SET_FOREACH(other, s, i) { | |
337 | UnitDependency d; | |
338 | ||
339 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 340 | set_remove(other->dependencies[d], u); |
701cc384 LP |
341 | |
342 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
343 | } |
344 | ||
345 | set_free(s); | |
346 | } | |
347 | ||
348 | void unit_free(Unit *u) { | |
349 | UnitDependency d; | |
350 | Iterator i; | |
351 | char *t; | |
352 | ||
353 | assert(u); | |
354 | ||
c1e1601e LP |
355 | bus_unit_send_removed_signal(u); |
356 | ||
ac155bb8 | 357 | if (u->load_state != UNIT_STUB) |
a013b84b LP |
358 | if (UNIT_VTABLE(u)->done) |
359 | UNIT_VTABLE(u)->done(u); | |
360 | ||
ac155bb8 MS |
361 | SET_FOREACH(t, u->names, i) |
362 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 363 | |
97e7d748 MS |
364 | if (u->job) { |
365 | Job *j = u->job; | |
366 | job_uninstall(j); | |
367 | job_free(j); | |
368 | } | |
964e0949 | 369 | |
e0209d83 MS |
370 | if (u->nop_job) { |
371 | Job *j = u->nop_job; | |
372 | job_uninstall(j); | |
373 | job_free(j); | |
374 | } | |
375 | ||
964e0949 | 376 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 377 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 378 | |
7c8fa05c LP |
379 | if (u->requires_mounts_for) { |
380 | LIST_REMOVE(Unit, has_requires_mounts_for, u->manager->has_requires_mounts_for, u); | |
381 | strv_free(u->requires_mounts_for); | |
382 | } | |
383 | ||
ac155bb8 MS |
384 | if (u->type != _UNIT_TYPE_INVALID) |
385 | LIST_REMOVE(Unit, units_by_type, u->manager->units_by_type[u->type], u); | |
ef734fd6 | 386 | |
ac155bb8 MS |
387 | if (u->in_load_queue) |
388 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
87f0e418 | 389 | |
ac155bb8 MS |
390 | if (u->in_dbus_queue) |
391 | LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u); | |
c1e1601e | 392 | |
ac155bb8 MS |
393 | if (u->in_cleanup_queue) |
394 | LIST_REMOVE(Unit, cleanup_queue, u->manager->cleanup_queue, u); | |
23a177ef | 395 | |
ac155bb8 MS |
396 | if (u->in_gc_queue) { |
397 | LIST_REMOVE(Unit, gc_queue, u->manager->gc_queue, u); | |
398 | u->manager->n_in_gc_queue--; | |
701cc384 LP |
399 | } |
400 | ||
ac155bb8 MS |
401 | cgroup_bonding_free_list(u->cgroup_bondings, u->manager->n_reloading <= 0); |
402 | cgroup_attribute_free_list(u->cgroup_attributes); | |
87f0e418 | 403 | |
ac155bb8 | 404 | free(u->description); |
49dbfa7b | 405 | strv_free(u->documentation); |
ac155bb8 | 406 | free(u->fragment_path); |
1b64d026 | 407 | free(u->source_path); |
ac155bb8 | 408 | free(u->instance); |
87f0e418 | 409 | |
ac155bb8 | 410 | set_free_free(u->names); |
87f0e418 | 411 | |
ac155bb8 | 412 | condition_free_list(u->conditions); |
52661efd | 413 | |
ac155bb8 MS |
414 | while (u->refs) |
415 | unit_ref_unset(u->refs); | |
57020a3a | 416 | |
87f0e418 LP |
417 | free(u); |
418 | } | |
419 | ||
420 | UnitActiveState unit_active_state(Unit *u) { | |
421 | assert(u); | |
422 | ||
ac155bb8 | 423 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
424 | return unit_active_state(unit_follow_merge(u)); |
425 | ||
426 | /* After a reload it might happen that a unit is not correctly | |
427 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 428 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
429 | |
430 | return UNIT_VTABLE(u)->active_state(u); | |
431 | } | |
432 | ||
10a94420 LP |
433 | const char* unit_sub_state_to_string(Unit *u) { |
434 | assert(u); | |
435 | ||
436 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
437 | } | |
438 | ||
23a177ef LP |
439 | static void complete_move(Set **s, Set **other) { |
440 | assert(s); | |
441 | assert(other); | |
87f0e418 | 442 | |
23a177ef LP |
443 | if (!*other) |
444 | return; | |
87f0e418 LP |
445 | |
446 | if (*s) | |
23a177ef LP |
447 | set_move(*s, *other); |
448 | else { | |
449 | *s = *other; | |
450 | *other = NULL; | |
451 | } | |
452 | } | |
87f0e418 | 453 | |
23a177ef LP |
454 | static void merge_names(Unit *u, Unit *other) { |
455 | char *t; | |
456 | Iterator i; | |
87f0e418 | 457 | |
23a177ef LP |
458 | assert(u); |
459 | assert(other); | |
460 | ||
ac155bb8 | 461 | complete_move(&u->names, &other->names); |
23a177ef | 462 | |
ac155bb8 MS |
463 | set_free_free(other->names); |
464 | other->names = NULL; | |
465 | other->id = NULL; | |
23a177ef | 466 | |
ac155bb8 MS |
467 | SET_FOREACH(t, u->names, i) |
468 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
87f0e418 LP |
469 | } |
470 | ||
23a177ef LP |
471 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
472 | Iterator i; | |
473 | Unit *back; | |
87f0e418 | 474 | int r; |
23a177ef LP |
475 | |
476 | assert(u); | |
477 | assert(other); | |
478 | assert(d < _UNIT_DEPENDENCY_MAX); | |
479 | ||
83a95334 | 480 | /* Fix backwards pointers */ |
ac155bb8 | 481 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
482 | UnitDependency k; |
483 | ||
484 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
ac155bb8 | 485 | if ((r = set_remove_and_put(back->dependencies[k], other, u)) < 0) { |
23a177ef LP |
486 | |
487 | if (r == -EEXIST) | |
ac155bb8 | 488 | set_remove(back->dependencies[k], other); |
23a177ef LP |
489 | else |
490 | assert(r == -ENOENT); | |
491 | } | |
492 | } | |
493 | ||
ac155bb8 | 494 | complete_move(&u->dependencies[d], &other->dependencies[d]); |
23a177ef | 495 | |
ac155bb8 MS |
496 | set_free(other->dependencies[d]); |
497 | other->dependencies[d] = NULL; | |
23a177ef LP |
498 | } |
499 | ||
500 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
501 | UnitDependency d; |
502 | ||
503 | assert(u); | |
504 | assert(other); | |
ac155bb8 MS |
505 | assert(u->manager == other->manager); |
506 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 507 | |
cc916967 LP |
508 | other = unit_follow_merge(other); |
509 | ||
23a177ef LP |
510 | if (other == u) |
511 | return 0; | |
512 | ||
ac155bb8 | 513 | if (u->type != other->type) |
9e2f7c11 LP |
514 | return -EINVAL; |
515 | ||
ac155bb8 | 516 | if (!u->instance != !other->instance) |
87f0e418 LP |
517 | return -EINVAL; |
518 | ||
ac155bb8 MS |
519 | if (other->load_state != UNIT_STUB && |
520 | other->load_state != UNIT_ERROR) | |
23a177ef | 521 | return -EEXIST; |
87f0e418 | 522 | |
ac155bb8 | 523 | if (other->job) |
819e213f LP |
524 | return -EEXIST; |
525 | ||
e0209d83 MS |
526 | if (other->nop_job) |
527 | return -EEXIST; | |
528 | ||
fdf20a31 | 529 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
530 | return -EEXIST; |
531 | ||
87f0e418 | 532 | /* Merge names */ |
23a177ef | 533 | merge_names(u, other); |
87f0e418 | 534 | |
57020a3a | 535 | /* Redirect all references */ |
ac155bb8 MS |
536 | while (other->refs) |
537 | unit_ref_set(other->refs, u); | |
57020a3a | 538 | |
87f0e418 LP |
539 | /* Merge dependencies */ |
540 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 541 | merge_dependencies(u, other, d); |
87f0e418 | 542 | |
ac155bb8 MS |
543 | other->load_state = UNIT_MERGED; |
544 | other->merged_into = u; | |
23a177ef | 545 | |
3616a49c LP |
546 | /* If there is still some data attached to the other node, we |
547 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 548 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
549 | if (UNIT_VTABLE(other)->done) |
550 | UNIT_VTABLE(other)->done(other); | |
551 | ||
552 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
553 | unit_add_to_cleanup_queue(other); |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | int unit_merge_by_name(Unit *u, const char *name) { | |
559 | Unit *other; | |
9e2f7c11 LP |
560 | int r; |
561 | char *s = NULL; | |
23a177ef LP |
562 | |
563 | assert(u); | |
564 | assert(name); | |
565 | ||
9e2f7c11 | 566 | if (unit_name_is_template(name)) { |
ac155bb8 | 567 | if (!u->instance) |
9e2f7c11 LP |
568 | return -EINVAL; |
569 | ||
ac155bb8 | 570 | if (!(s = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
571 | return -ENOMEM; |
572 | ||
573 | name = s; | |
574 | } | |
575 | ||
ac155bb8 | 576 | if (!(other = manager_get_unit(u->manager, name))) |
9e2f7c11 LP |
577 | r = unit_add_name(u, name); |
578 | else | |
579 | r = unit_merge(u, other); | |
23a177ef | 580 | |
9e2f7c11 LP |
581 | free(s); |
582 | return r; | |
23a177ef LP |
583 | } |
584 | ||
585 | Unit* unit_follow_merge(Unit *u) { | |
586 | assert(u); | |
587 | ||
ac155bb8 MS |
588 | while (u->load_state == UNIT_MERGED) |
589 | assert_se(u = u->merged_into); | |
23a177ef LP |
590 | |
591 | return u; | |
592 | } | |
593 | ||
594 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
595 | int r; | |
596 | ||
597 | assert(u); | |
598 | assert(c); | |
599 | ||
ecc6e2b8 LP |
600 | if (c->std_output != EXEC_OUTPUT_KMSG && |
601 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 602 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
603 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
604 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 605 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 606 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 607 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 608 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 609 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 610 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 611 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
612 | return 0; |
613 | ||
614 | /* If syslog or kernel logging is requested, make sure our own | |
615 | * logging daemon is run first. */ | |
616 | ||
67445f4e | 617 | if (u->manager->running_as == SYSTEMD_SYSTEM) |
54fe0cdb | 618 | if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true)) < 0) |
23a177ef LP |
619 | return r; |
620 | ||
87f0e418 LP |
621 | return 0; |
622 | } | |
623 | ||
87f0e418 LP |
624 | const char *unit_description(Unit *u) { |
625 | assert(u); | |
626 | ||
ac155bb8 MS |
627 | if (u->description) |
628 | return u->description; | |
87f0e418 | 629 | |
ac155bb8 | 630 | return strna(u->id); |
87f0e418 LP |
631 | } |
632 | ||
633 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 634 | char *t, **j; |
87f0e418 LP |
635 | UnitDependency d; |
636 | Iterator i; | |
47be870b LP |
637 | char *p2; |
638 | const char *prefix2; | |
173e3821 LP |
639 | char |
640 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
641 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
642 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
643 | timestamp4[FORMAT_TIMESTAMP_MAX], |
644 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 645 | Unit *following; |
87f0e418 LP |
646 | |
647 | assert(u); | |
ac155bb8 | 648 | assert(u->type >= 0); |
87f0e418 LP |
649 | |
650 | if (!prefix) | |
651 | prefix = ""; | |
47be870b LP |
652 | p2 = strappend(prefix, "\t"); |
653 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
654 | |
655 | fprintf(f, | |
40d50879 | 656 | "%s-> Unit %s:\n" |
87f0e418 | 657 | "%s\tDescription: %s\n" |
9e2f7c11 | 658 | "%s\tInstance: %s\n" |
87f0e418 | 659 | "%s\tUnit Load State: %s\n" |
2fad8195 | 660 | "%s\tUnit Active State: %s\n" |
173e3821 | 661 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 662 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 663 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 664 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 LP |
665 | "%s\tGC Check Good: %s\n" |
666 | "%s\tNeed Daemon Reload: %s\n", | |
ac155bb8 | 667 | prefix, u->id, |
87f0e418 | 668 | prefix, unit_description(u), |
ac155bb8 MS |
669 | prefix, strna(u->instance), |
670 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 671 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
672 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
673 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
674 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
675 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 LP |
676 | prefix, yes_no(unit_check_gc(u)), |
677 | prefix, yes_no(unit_need_daemon_reload(u))); | |
0301abf4 | 678 | |
ac155bb8 | 679 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
680 | fprintf(f, "%s\tName: %s\n", prefix, t); |
681 | ||
49dbfa7b LP |
682 | STRV_FOREACH(j, u->documentation) |
683 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
684 | ||
a7f241db | 685 | if ((following = unit_following(u))) |
ac155bb8 | 686 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 687 | |
ac155bb8 MS |
688 | if (u->fragment_path) |
689 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 690 | |
1b64d026 LP |
691 | if (u->source_path) |
692 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
693 | ||
ac155bb8 MS |
694 | if (u->job_timeout > 0) |
695 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout)); | |
faf919f1 | 696 | |
ac155bb8 | 697 | condition_dump_list(u->conditions, f, prefix); |
52661efd | 698 | |
ac155bb8 | 699 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
700 | fprintf(f, |
701 | "%s\tCondition Timestamp: %s\n" | |
702 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
703 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
704 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 705 | |
87f0e418 LP |
706 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
707 | Unit *other; | |
708 | ||
ac155bb8 MS |
709 | SET_FOREACH(other, u->dependencies[d], i) |
710 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
711 | } |
712 | ||
7c8fa05c | 713 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
714 | fprintf(f, |
715 | "%s\tRequiresMountsFor:", prefix); | |
716 | ||
717 | STRV_FOREACH(j, u->requires_mounts_for) | |
718 | fprintf(f, " %s", *j); | |
719 | ||
720 | fputs("\n", f); | |
721 | } | |
722 | ||
ac155bb8 | 723 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 LP |
724 | CGroupBonding *b; |
725 | CGroupAttribute *a; | |
726 | ||
b0650475 | 727 | fprintf(f, |
a40eb732 | 728 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
729 | "%s\tRefuseManualStart: %s\n" |
730 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 731 | "%s\tDefaultDependencies: %s\n" |
c8f4d764 | 732 | "%s\tOnFailureIsolate: %s\n" |
7a6000a6 LP |
733 | "%s\tIgnoreOnIsolate: %s\n" |
734 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
735 | prefix, yes_no(u->stop_when_unneeded), |
736 | prefix, yes_no(u->refuse_manual_start), | |
737 | prefix, yes_no(u->refuse_manual_stop), | |
738 | prefix, yes_no(u->default_dependencies), | |
739 | prefix, yes_no(u->on_failure_isolate), | |
740 | prefix, yes_no(u->ignore_on_isolate), | |
741 | prefix, yes_no(u->ignore_on_snapshot)); | |
742 | ||
743 | LIST_FOREACH(by_unit, b, u->cgroup_bondings) | |
23a177ef LP |
744 | fprintf(f, "%s\tControlGroup: %s:%s\n", |
745 | prefix, b->controller, b->path); | |
8e274523 | 746 | |
ac155bb8 | 747 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) { |
d8bbda91 LP |
748 | char *v = NULL; |
749 | ||
750 | if (a->map_callback) | |
751 | a->map_callback(a->controller, a->name, a->value, &v); | |
752 | ||
ab1f0633 | 753 | fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n", |
d8bbda91 LP |
754 | prefix, a->controller, a->name, v ? v : a->value); |
755 | ||
756 | free(v); | |
757 | } | |
ab1f0633 | 758 | |
23a177ef LP |
759 | if (UNIT_VTABLE(u)->dump) |
760 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 761 | |
ac155bb8 | 762 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
763 | fprintf(f, |
764 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
765 | prefix, u->merged_into->id); |
766 | else if (u->load_state == UNIT_ERROR) | |
767 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 768 | |
87f0e418 | 769 | |
ac155bb8 MS |
770 | if (u->job) |
771 | job_dump(u->job, f, prefix2); | |
87f0e418 | 772 | |
e0209d83 MS |
773 | if (u->nop_job) |
774 | job_dump(u->nop_job, f, prefix2); | |
775 | ||
47be870b | 776 | free(p2); |
87f0e418 LP |
777 | } |
778 | ||
779 | /* Common implementation for multiple backends */ | |
e537352b | 780 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
781 | int r; |
782 | ||
783 | assert(u); | |
23a177ef LP |
784 | |
785 | /* Load a .service file */ | |
e537352b | 786 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
787 | return r; |
788 | ||
ac155bb8 | 789 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
790 | return -ENOENT; |
791 | ||
792 | /* Load drop-in directory data */ | |
793 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
794 | return r; | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | /* Common implementation for multiple backends */ | |
e537352b | 800 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 801 | int r; |
87f0e418 LP |
802 | |
803 | assert(u); | |
804 | ||
23a177ef LP |
805 | /* Same as unit_load_fragment_and_dropin(), but whether |
806 | * something can be loaded or not doesn't matter. */ | |
807 | ||
808 | /* Load a .service file */ | |
e537352b | 809 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
810 | return r; |
811 | ||
ac155bb8 MS |
812 | if (u->load_state == UNIT_STUB) |
813 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 814 | |
87f0e418 | 815 | /* Load drop-in directory data */ |
23a177ef | 816 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
817 | return r; |
818 | ||
23a177ef | 819 | return 0; |
87f0e418 LP |
820 | } |
821 | ||
bba34eed | 822 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
823 | assert(u); |
824 | assert(target); | |
825 | ||
ac155bb8 | 826 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
827 | return 0; |
828 | ||
35b8ca3a | 829 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 830 | * that loop check below is reliable */ |
ac155bb8 MS |
831 | if (u->load_state != UNIT_LOADED || |
832 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
833 | return 0; |
834 | ||
21256a2b LP |
835 | /* If either side wants no automatic dependencies, then let's |
836 | * skip this */ | |
ac155bb8 MS |
837 | if (!u->default_dependencies || |
838 | !target->default_dependencies) | |
21256a2b LP |
839 | return 0; |
840 | ||
98bc2000 | 841 | /* Don't create loops */ |
ac155bb8 | 842 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
843 | return 0; |
844 | ||
845 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
846 | } | |
847 | ||
848 | static int unit_add_default_dependencies(Unit *u) { | |
21256a2b LP |
849 | static const UnitDependency deps[] = { |
850 | UNIT_REQUIRED_BY, | |
851 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
852 | UNIT_WANTED_BY, | |
853 | UNIT_BOUND_BY | |
854 | }; | |
855 | ||
bba34eed | 856 | Unit *target; |
98bc2000 LP |
857 | Iterator i; |
858 | int r; | |
21256a2b | 859 | unsigned k; |
98bc2000 LP |
860 | |
861 | assert(u); | |
862 | ||
21256a2b | 863 | for (k = 0; k < ELEMENTSOF(deps); k++) |
ac155bb8 | 864 | SET_FOREACH(target, u->dependencies[deps[k]], i) |
21256a2b LP |
865 | if ((r = unit_add_default_target_dependency(u, target)) < 0) |
866 | return r; | |
b81884e7 | 867 | |
98bc2000 LP |
868 | return 0; |
869 | } | |
870 | ||
87f0e418 LP |
871 | int unit_load(Unit *u) { |
872 | int r; | |
873 | ||
874 | assert(u); | |
875 | ||
ac155bb8 MS |
876 | if (u->in_load_queue) { |
877 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
878 | u->in_load_queue = false; | |
87f0e418 LP |
879 | } |
880 | ||
ac155bb8 | 881 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
882 | return -EINVAL; |
883 | ||
ac155bb8 | 884 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
885 | return 0; |
886 | ||
e537352b LP |
887 | if (UNIT_VTABLE(u)->load) |
888 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 889 | goto fail; |
23a177ef | 890 | |
ac155bb8 | 891 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
892 | r = -ENOENT; |
893 | goto fail; | |
894 | } | |
895 | ||
ac155bb8 MS |
896 | if (u->load_state == UNIT_LOADED && |
897 | u->default_dependencies) | |
98bc2000 LP |
898 | if ((r = unit_add_default_dependencies(u)) < 0) |
899 | goto fail; | |
900 | ||
7c8fa05c LP |
901 | if (u->load_state == UNIT_LOADED) { |
902 | r = unit_add_mount_links(u); | |
903 | if (r < 0) | |
904 | return r; | |
905 | } | |
906 | ||
ac155bb8 MS |
907 | if (u->on_failure_isolate && |
908 | set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { | |
f68319bb LP |
909 | |
910 | log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", | |
ac155bb8 | 911 | u->id); |
f68319bb LP |
912 | |
913 | r = -EINVAL; | |
914 | goto fail; | |
915 | } | |
916 | ||
ac155bb8 | 917 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
918 | |
919 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 920 | unit_add_to_gc_queue(u); |
87f0e418 | 921 | |
87f0e418 LP |
922 | return 0; |
923 | ||
924 | fail: | |
ac155bb8 MS |
925 | u->load_state = UNIT_ERROR; |
926 | u->load_error = r; | |
c1e1601e | 927 | unit_add_to_dbus_queue(u); |
9a46fc3b | 928 | unit_add_to_gc_queue(u); |
23a177ef | 929 | |
ac155bb8 | 930 | log_debug("Failed to load configuration for %s: %s", u->id, strerror(-r)); |
23a177ef | 931 | |
87f0e418 LP |
932 | return r; |
933 | } | |
934 | ||
90bbc946 LP |
935 | bool unit_condition_test(Unit *u) { |
936 | assert(u); | |
937 | ||
ac155bb8 MS |
938 | dual_timestamp_get(&u->condition_timestamp); |
939 | u->condition_result = condition_test_list(u->conditions); | |
90bbc946 | 940 | |
ac155bb8 | 941 | return u->condition_result; |
90bbc946 LP |
942 | } |
943 | ||
877d54e9 | 944 | static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 945 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
946 | |
947 | assert(u); | |
948 | assert(t >= 0); | |
949 | assert(t < _JOB_TYPE_MAX); | |
950 | ||
951 | if (t != JOB_START && t != JOB_STOP) | |
952 | return NULL; | |
c6918296 MS |
953 | |
954 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
955 | if (!format_table) | |
877d54e9 LP |
956 | return NULL; |
957 | ||
958 | return format_table->starting_stopping[t == JOB_STOP]; | |
959 | } | |
960 | ||
961 | static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { | |
962 | const char *format; | |
963 | ||
964 | assert(u); | |
965 | assert(t >= 0); | |
966 | assert(t < _JOB_TYPE_MAX); | |
967 | ||
968 | format = unit_get_status_message_format(u, t); | |
969 | if (format) | |
970 | return format; | |
971 | ||
972 | /* Return generic strings */ | |
973 | if (t == JOB_START) | |
974 | return "Starting %s."; | |
975 | else if (t == JOB_STOP) | |
976 | return "Stopping %s."; | |
977 | else if (t == JOB_RELOAD) | |
978 | return "Reloading %s."; | |
979 | ||
980 | return NULL; | |
981 | } | |
982 | ||
983 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
984 | const char *format; | |
985 | ||
986 | assert(u); | |
987 | ||
988 | /* We only print status messages for selected units on | |
989 | * selected operations. */ | |
c6918296 | 990 | |
877d54e9 | 991 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
992 | if (!format) |
993 | return; | |
994 | ||
995 | unit_status_printf(u, "", format, unit_description(u)); | |
996 | } | |
997 | ||
877d54e9 LP |
998 | #pragma GCC diagnostic push |
999 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
1000 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { | |
1001 | const char *format; | |
1002 | char buf[LINE_MAX]; | |
1003 | sd_id128_t mid; | |
1004 | ||
1005 | assert(u); | |
1006 | ||
1007 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1008 | return; | |
1009 | ||
81270860 LP |
1010 | if (log_on_console()) |
1011 | return; | |
1012 | ||
877d54e9 LP |
1013 | /* We log status messages for all units and all operations. */ |
1014 | ||
1015 | format = unit_get_status_message_format_try_harder(u, t); | |
1016 | if (!format) | |
1017 | return; | |
1018 | ||
1019 | snprintf(buf, sizeof(buf), format, unit_description(u)); | |
1020 | char_array_0(buf); | |
1021 | ||
1022 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1023 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1024 | SD_MESSAGE_UNIT_RELOADING; | |
1025 | ||
bbc9006e MT |
1026 | log_struct_unit(LOG_INFO, |
1027 | u->id, | |
1ca6783f | 1028 | MESSAGE_ID(mid), |
877d54e9 LP |
1029 | "MESSAGE=%s", buf, |
1030 | NULL); | |
1031 | } | |
1032 | #pragma GCC diagnostic pop | |
1033 | ||
87f0e418 | 1034 | /* Errors: |
d5159713 LP |
1035 | * -EBADR: This unit type does not support starting. |
1036 | * -EALREADY: Unit is already started. | |
1037 | * -EAGAIN: An operation is already in progress. Retry later. | |
1038 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
1039 | */ |
1040 | int unit_start(Unit *u) { | |
1041 | UnitActiveState state; | |
92ab323c | 1042 | Unit *following; |
87f0e418 LP |
1043 | |
1044 | assert(u); | |
1045 | ||
ac155bb8 | 1046 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1047 | return -EINVAL; |
1048 | ||
a82e5507 LP |
1049 | /* If this is already started, then this will succeed. Note |
1050 | * that this will even succeed if this unit is not startable | |
1051 | * by the user. This is relied on to detect when we need to | |
1052 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1053 | state = unit_active_state(u); |
1054 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1055 | return -EALREADY; | |
1056 | ||
a82e5507 LP |
1057 | /* If the conditions failed, don't do anything at all. If we |
1058 | * already are activating this call might still be useful to | |
1059 | * speed up activation in case there is some hold-off time, | |
1060 | * but we don't want to recheck the condition in that case. */ | |
1061 | if (state != UNIT_ACTIVATING && | |
1062 | !unit_condition_test(u)) { | |
ac155bb8 | 1063 | log_debug("Starting of %s requested but condition failed. Ignoring.", u->id); |
52661efd LP |
1064 | return -EALREADY; |
1065 | } | |
1066 | ||
92ab323c LP |
1067 | /* Forward to the main object, if we aren't it. */ |
1068 | if ((following = unit_following(u))) { | |
ac155bb8 | 1069 | log_debug("Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1070 | return unit_start(following); |
1071 | } | |
1072 | ||
877d54e9 LP |
1073 | unit_status_log_starting_stopping_reloading(u, JOB_START); |
1074 | unit_status_print_starting_stopping(u, JOB_START); | |
c6918296 | 1075 | |
92ab323c LP |
1076 | /* If it is stopped, but we cannot start it, then fail */ |
1077 | if (!UNIT_VTABLE(u)->start) | |
1078 | return -EBADR; | |
1079 | ||
87f0e418 LP |
1080 | /* We don't suppress calls to ->start() here when we are |
1081 | * already starting, to allow this request to be used as a | |
1082 | * "hurry up" call, for example when the unit is in some "auto | |
1083 | * restart" state where it waits for a holdoff timer to elapse | |
1084 | * before it will start again. */ | |
1085 | ||
c1e1601e | 1086 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1087 | |
87f0e418 LP |
1088 | return UNIT_VTABLE(u)->start(u); |
1089 | } | |
1090 | ||
1091 | bool unit_can_start(Unit *u) { | |
1092 | assert(u); | |
1093 | ||
1094 | return !!UNIT_VTABLE(u)->start; | |
1095 | } | |
1096 | ||
2528a7a6 LP |
1097 | bool unit_can_isolate(Unit *u) { |
1098 | assert(u); | |
1099 | ||
1100 | return unit_can_start(u) && | |
ac155bb8 | 1101 | u->allow_isolate; |
2528a7a6 LP |
1102 | } |
1103 | ||
87f0e418 LP |
1104 | /* Errors: |
1105 | * -EBADR: This unit type does not support stopping. | |
1106 | * -EALREADY: Unit is already stopped. | |
1107 | * -EAGAIN: An operation is already in progress. Retry later. | |
1108 | */ | |
1109 | int unit_stop(Unit *u) { | |
1110 | UnitActiveState state; | |
92ab323c | 1111 | Unit *following; |
87f0e418 LP |
1112 | |
1113 | assert(u); | |
1114 | ||
87f0e418 | 1115 | state = unit_active_state(u); |
fdf20a31 | 1116 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1117 | return -EALREADY; |
1118 | ||
92ab323c | 1119 | if ((following = unit_following(u))) { |
ac155bb8 | 1120 | log_debug("Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1121 | return unit_stop(following); |
1122 | } | |
1123 | ||
877d54e9 LP |
1124 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); |
1125 | unit_status_print_starting_stopping(u, JOB_STOP); | |
c6918296 | 1126 | |
7898b0cf LP |
1127 | if (!UNIT_VTABLE(u)->stop) |
1128 | return -EBADR; | |
1129 | ||
c1e1601e | 1130 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1131 | |
87f0e418 LP |
1132 | return UNIT_VTABLE(u)->stop(u); |
1133 | } | |
1134 | ||
1135 | /* Errors: | |
1136 | * -EBADR: This unit type does not support reloading. | |
1137 | * -ENOEXEC: Unit is not started. | |
1138 | * -EAGAIN: An operation is already in progress. Retry later. | |
1139 | */ | |
1140 | int unit_reload(Unit *u) { | |
1141 | UnitActiveState state; | |
92ab323c | 1142 | Unit *following; |
87f0e418 LP |
1143 | |
1144 | assert(u); | |
1145 | ||
ac155bb8 | 1146 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1147 | return -EINVAL; |
1148 | ||
87f0e418 LP |
1149 | if (!unit_can_reload(u)) |
1150 | return -EBADR; | |
1151 | ||
1152 | state = unit_active_state(u); | |
e364ad06 | 1153 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1154 | return -EALREADY; |
1155 | ||
e364ad06 | 1156 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
1157 | return -ENOEXEC; |
1158 | ||
92ab323c | 1159 | if ((following = unit_following(u))) { |
ac155bb8 | 1160 | log_debug("Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1161 | return unit_reload(following); |
1162 | } | |
1163 | ||
877d54e9 LP |
1164 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); |
1165 | ||
c1e1601e | 1166 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1167 | return UNIT_VTABLE(u)->reload(u); |
1168 | } | |
1169 | ||
1170 | bool unit_can_reload(Unit *u) { | |
1171 | assert(u); | |
1172 | ||
1173 | if (!UNIT_VTABLE(u)->reload) | |
1174 | return false; | |
1175 | ||
1176 | if (!UNIT_VTABLE(u)->can_reload) | |
1177 | return true; | |
1178 | ||
1179 | return UNIT_VTABLE(u)->can_reload(u); | |
1180 | } | |
1181 | ||
b4a16b7b | 1182 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1183 | Iterator i; |
1184 | Unit *other; | |
1185 | ||
1186 | assert(u); | |
1187 | ||
1188 | /* If this service shall be shut down when unneeded then do | |
1189 | * so. */ | |
1190 | ||
ac155bb8 | 1191 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1192 | return; |
1193 | ||
1194 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1195 | return; | |
1196 | ||
ac155bb8 | 1197 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
f60c2665 | 1198 | if (unit_pending_active(other)) |
f3bff0eb LP |
1199 | return; |
1200 | ||
ac155bb8 | 1201 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f60c2665 | 1202 | if (unit_pending_active(other)) |
f3bff0eb LP |
1203 | return; |
1204 | ||
ac155bb8 | 1205 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
f60c2665 | 1206 | if (unit_pending_active(other)) |
f3bff0eb LP |
1207 | return; |
1208 | ||
ac155bb8 | 1209 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
f60c2665 | 1210 | if (unit_pending_active(other)) |
b81884e7 LP |
1211 | return; |
1212 | ||
ac155bb8 | 1213 | log_info("Service %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1214 | |
1215 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1216 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1217 | } |
1218 | ||
87f0e418 LP |
1219 | static void retroactively_start_dependencies(Unit *u) { |
1220 | Iterator i; | |
1221 | Unit *other; | |
1222 | ||
1223 | assert(u); | |
1224 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1225 | ||
ac155bb8 MS |
1226 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1227 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1228 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1229 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1230 | |
7f2cddae | 1231 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1232 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1233 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1234 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1235 | |
ac155bb8 MS |
1236 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1237 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1238 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1239 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1240 | |
ac155bb8 MS |
1241 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
1242 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1243 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1244 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1245 | |
ac155bb8 MS |
1246 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1247 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1248 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1249 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1250 | |
ac155bb8 | 1251 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1252 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1253 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1254 | |
ac155bb8 | 1255 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1256 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1257 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1258 | } |
1259 | ||
1260 | static void retroactively_stop_dependencies(Unit *u) { | |
1261 | Iterator i; | |
1262 | Unit *other; | |
1263 | ||
1264 | assert(u); | |
1265 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1266 | ||
b81884e7 | 1267 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1268 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1269 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1270 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1271 | } |
1272 | ||
1273 | static void check_unneeded_dependencies(Unit *u) { | |
1274 | Iterator i; | |
1275 | Unit *other; | |
1276 | ||
1277 | assert(u); | |
1278 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1279 | |
1280 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1281 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1282 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1283 | unit_check_unneeded(other); |
ac155bb8 | 1284 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1285 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1286 | unit_check_unneeded(other); |
ac155bb8 | 1287 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1288 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1289 | unit_check_unneeded(other); |
ac155bb8 | 1290 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1291 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1292 | unit_check_unneeded(other); |
ac155bb8 | 1293 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1294 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1295 | unit_check_unneeded(other); |
7f2cddae | 1296 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1297 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1298 | unit_check_unneeded(other); | |
87f0e418 LP |
1299 | } |
1300 | ||
c0daa706 LP |
1301 | void unit_trigger_on_failure(Unit *u) { |
1302 | Unit *other; | |
1303 | Iterator i; | |
1304 | ||
1305 | assert(u); | |
1306 | ||
ac155bb8 | 1307 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1308 | return; |
1309 | ||
ac155bb8 | 1310 | log_info("Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1311 | |
ac155bb8 | 1312 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1313 | int r; |
1314 | ||
ac155bb8 | 1315 | if ((r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0) |
222ae6a8 LP |
1316 | log_error("Failed to enqueue OnFailure= job: %s", strerror(-r)); |
1317 | } | |
c0daa706 LP |
1318 | } |
1319 | ||
e2f3b44c | 1320 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
7e6e7b06 | 1321 | bool unexpected; |
a096ed36 | 1322 | |
87f0e418 LP |
1323 | assert(u); |
1324 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1325 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1326 | |
8e471ccd LP |
1327 | /* Note that this is called for all low-level state changes, |
1328 | * even if they might map to the same high-level | |
1329 | * UnitActiveState! That means that ns == os is OK an expected | |
c5315881 | 1330 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1331 | * this function will be called too! */ |
87f0e418 | 1332 | |
ac155bb8 | 1333 | if (u->manager->n_reloading <= 0) { |
bdbf9951 | 1334 | dual_timestamp ts; |
173e3821 | 1335 | |
bdbf9951 | 1336 | dual_timestamp_get(&ts); |
173e3821 | 1337 | |
bdbf9951 | 1338 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1339 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1340 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1341 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1342 | |
1343 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1344 | u->active_enter_timestamp = ts; |
bdbf9951 | 1345 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1346 | u->active_exit_timestamp = ts; |
bdbf9951 LP |
1347 | |
1348 | timer_unit_notify(u, ns); | |
1349 | path_unit_notify(u, ns); | |
1350 | } | |
87f0e418 | 1351 | |
fdf20a31 | 1352 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1353 | cgroup_bonding_trim_list(u->cgroup_bondings, true); |
fb385181 | 1354 | |
ac155bb8 | 1355 | if (u->job) { |
7e6e7b06 | 1356 | unexpected = false; |
87f0e418 | 1357 | |
ac155bb8 | 1358 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1359 | |
1360 | /* So we reached a different state for this | |
1361 | * job. Let's see if we can run it now if it | |
1362 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1363 | job_add_to_run_queue(u->job); |
87f0e418 | 1364 | |
b410e6b9 | 1365 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1366 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1367 | * hence needs to invalidate jobs. */ |
87f0e418 | 1368 | |
ac155bb8 | 1369 | switch (u->job->type) { |
87f0e418 | 1370 | |
b410e6b9 LP |
1371 | case JOB_START: |
1372 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1373 | |
b410e6b9 | 1374 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1375 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1376 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1377 | unexpected = true; |
41b02ec7 | 1378 | |
fdf20a31 | 1379 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1380 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1381 | } |
87f0e418 | 1382 | |
b410e6b9 | 1383 | break; |
87f0e418 | 1384 | |
b410e6b9 LP |
1385 | case JOB_RELOAD: |
1386 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1387 | |
ac155bb8 | 1388 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1389 | if (ns == UNIT_ACTIVE) |
5273510e | 1390 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1391 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1392 | unexpected = true; |
41b02ec7 | 1393 | |
fdf20a31 | 1394 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1395 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1396 | } |
b410e6b9 | 1397 | } |
87f0e418 | 1398 | |
b410e6b9 | 1399 | break; |
87f0e418 | 1400 | |
b410e6b9 LP |
1401 | case JOB_STOP: |
1402 | case JOB_RESTART: | |
1403 | case JOB_TRY_RESTART: | |
87f0e418 | 1404 | |
fdf20a31 | 1405 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1406 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1407 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1408 | unexpected = true; |
5273510e | 1409 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1410 | } |
87f0e418 | 1411 | |
b410e6b9 | 1412 | break; |
87f0e418 | 1413 | |
b410e6b9 LP |
1414 | default: |
1415 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1416 | } |
87f0e418 | 1417 | |
7e6e7b06 LP |
1418 | } else |
1419 | unexpected = true; | |
1420 | ||
ac155bb8 | 1421 | if (u->manager->n_reloading <= 0) { |
f3bff0eb | 1422 | |
bdbf9951 LP |
1423 | /* If this state change happened without being |
1424 | * requested by a job, then let's retroactively start | |
1425 | * or stop dependencies. We skip that step when | |
1426 | * deserializing, since we don't want to create any | |
1427 | * additional jobs just because something is already | |
1428 | * activated. */ | |
1429 | ||
1430 | if (unexpected) { | |
1431 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1432 | retroactively_start_dependencies(u); | |
1433 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1434 | retroactively_stop_dependencies(u); | |
1435 | } | |
5de9682c | 1436 | |
cd0504d0 MS |
1437 | /* stop unneeded units regardless if going down was expected or not */ |
1438 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1439 | check_unneeded_dependencies(u); | |
1440 | ||
bdbf9951 | 1441 | if (ns != os && ns == UNIT_FAILED) { |
bbc9006e MT |
1442 | log_struct_unit(LOG_NOTICE, |
1443 | u->id, | |
23635a85 | 1444 | "MESSAGE=Unit %s entered failed state", u->id, |
23635a85 | 1445 | NULL); |
bdbf9951 | 1446 | unit_trigger_on_failure(u); |
cd6d0a45 | 1447 | } |
3b2775c5 | 1448 | } |
e537352b | 1449 | |
3b2775c5 LP |
1450 | /* Some names are special */ |
1451 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1452 | ||
1453 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1454 | /* The bus just might have become available, | |
1455 | * hence try to connect to it, if we aren't | |
1456 | * yet connected. */ | |
ac155bb8 | 1457 | bus_init(u->manager, true); |
3b2775c5 | 1458 | |
ac155bb8 | 1459 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1460 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
ac155bb8 | 1461 | u->manager->n_reloading <= 0) { |
3b2775c5 | 1462 | /* Write audit record if we have just finished starting up */ |
ac155bb8 MS |
1463 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); |
1464 | u->in_audit = true; | |
3b2775c5 | 1465 | } |
e983b760 | 1466 | |
3b2775c5 | 1467 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
ac155bb8 | 1468 | manager_send_unit_plymouth(u->manager, u); |
bdbf9951 | 1469 | |
3b2775c5 | 1470 | } else { |
bdbf9951 | 1471 | |
3b2775c5 LP |
1472 | /* We don't care about D-Bus here, since we'll get an |
1473 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1474 | |
ac155bb8 | 1475 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1476 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1477 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
ac155bb8 | 1478 | u->manager->n_reloading <= 0) { |
4927fcae | 1479 | |
3b2775c5 LP |
1480 | /* Hmm, if there was no start record written |
1481 | * write it now, so that we always have a nice | |
1482 | * pair */ | |
ac155bb8 MS |
1483 | if (!u->in_audit) { |
1484 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 1485 | |
3b2775c5 | 1486 | if (ns == UNIT_INACTIVE) |
ac155bb8 | 1487 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1488 | } else |
1489 | /* Write audit record if we have just finished shutting down */ | |
ac155bb8 | 1490 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1491 | |
ac155bb8 | 1492 | u->in_audit = false; |
cd6d0a45 | 1493 | } |
f278026d LP |
1494 | } |
1495 | ||
ac155bb8 | 1496 | manager_recheck_journal(u->manager); |
3b2775c5 | 1497 | |
f3bff0eb LP |
1498 | /* Maybe we finished startup and are now ready for being |
1499 | * stopped because unneeded? */ | |
b4a16b7b | 1500 | unit_check_unneeded(u); |
c1e1601e LP |
1501 | |
1502 | unit_add_to_dbus_queue(u); | |
701cc384 | 1503 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1504 | } |
1505 | ||
acbb0225 | 1506 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1507 | struct epoll_event ev; |
1508 | ||
1509 | assert(u); | |
1510 | assert(fd >= 0); | |
acbb0225 | 1511 | assert(w); |
ea430986 | 1512 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1513 | |
1514 | zero(ev); | |
acbb0225 | 1515 | ev.data.ptr = w; |
87f0e418 LP |
1516 | ev.events = events; |
1517 | ||
ac155bb8 | 1518 | if (epoll_ctl(u->manager->epoll_fd, |
acbb0225 LP |
1519 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, |
1520 | fd, | |
1521 | &ev) < 0) | |
1522 | return -errno; | |
87f0e418 | 1523 | |
acbb0225 LP |
1524 | w->fd = fd; |
1525 | w->type = WATCH_FD; | |
ea430986 | 1526 | w->data.unit = u; |
87f0e418 | 1527 | |
acbb0225 | 1528 | return 0; |
87f0e418 LP |
1529 | } |
1530 | ||
acbb0225 | 1531 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1532 | assert(u); |
acbb0225 | 1533 | assert(w); |
87f0e418 | 1534 | |
acbb0225 LP |
1535 | if (w->type == WATCH_INVALID) |
1536 | return; | |
1537 | ||
ea430986 LP |
1538 | assert(w->type == WATCH_FD); |
1539 | assert(w->data.unit == u); | |
ac155bb8 | 1540 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
acbb0225 LP |
1541 | |
1542 | w->fd = -1; | |
1543 | w->type = WATCH_INVALID; | |
ea430986 | 1544 | w->data.unit = NULL; |
87f0e418 LP |
1545 | } |
1546 | ||
1547 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1548 | assert(u); | |
1549 | assert(pid >= 1); | |
1550 | ||
05e343b7 LP |
1551 | /* Watch a specific PID. We only support one unit watching |
1552 | * each PID for now. */ | |
1553 | ||
ac155bb8 | 1554 | return hashmap_put(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1555 | } |
1556 | ||
1557 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1558 | assert(u); | |
1559 | assert(pid >= 1); | |
1560 | ||
ac155bb8 | 1561 | hashmap_remove_value(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1562 | } |
1563 | ||
36697dc0 | 1564 | int unit_watch_timer(Unit *u, clockid_t clock_id, bool relative, usec_t usec, Watch *w) { |
87f0e418 | 1565 | struct itimerspec its; |
acbb0225 | 1566 | int flags, fd; |
87f0e418 LP |
1567 | bool ours; |
1568 | ||
1569 | assert(u); | |
acbb0225 | 1570 | assert(w); |
faf919f1 | 1571 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1572 | |
1573 | /* This will try to reuse the old timer if there is one */ | |
1574 | ||
faf919f1 LP |
1575 | if (w->type == WATCH_UNIT_TIMER) { |
1576 | assert(w->data.unit == u); | |
1577 | assert(w->fd >= 0); | |
1578 | ||
87f0e418 | 1579 | ours = false; |
acbb0225 | 1580 | fd = w->fd; |
faf919f1 LP |
1581 | } else if (w->type == WATCH_INVALID) { |
1582 | ||
87f0e418 | 1583 | ours = true; |
36697dc0 | 1584 | fd = timerfd_create(clock_id, TFD_NONBLOCK|TFD_CLOEXEC); |
68b29a9f | 1585 | if (fd < 0) |
87f0e418 | 1586 | return -errno; |
faf919f1 LP |
1587 | } else |
1588 | assert_not_reached("Invalid watch type"); | |
87f0e418 LP |
1589 | |
1590 | zero(its); | |
1591 | ||
36697dc0 | 1592 | if (usec <= 0) { |
87f0e418 LP |
1593 | /* Set absolute time in the past, but not 0, since we |
1594 | * don't want to disarm the timer */ | |
1595 | its.it_value.tv_sec = 0; | |
1596 | its.it_value.tv_nsec = 1; | |
1597 | ||
1598 | flags = TFD_TIMER_ABSTIME; | |
1599 | } else { | |
36697dc0 LP |
1600 | timespec_store(&its.it_value, usec); |
1601 | flags = relative ? 0 : TFD_TIMER_ABSTIME; | |
87f0e418 LP |
1602 | } |
1603 | ||
1604 | /* This will also flush the elapse counter */ | |
1605 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1606 | goto fail; | |
1607 | ||
acbb0225 LP |
1608 | if (w->type == WATCH_INVALID) { |
1609 | struct epoll_event ev; | |
87f0e418 | 1610 | |
acbb0225 LP |
1611 | zero(ev); |
1612 | ev.data.ptr = w; | |
f94ea366 | 1613 | ev.events = EPOLLIN; |
acbb0225 | 1614 | |
ac155bb8 | 1615 | if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) |
acbb0225 LP |
1616 | goto fail; |
1617 | } | |
1618 | ||
faf919f1 | 1619 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1620 | w->fd = fd; |
ea430986 | 1621 | w->data.unit = u; |
87f0e418 | 1622 | |
87f0e418 LP |
1623 | return 0; |
1624 | ||
1625 | fail: | |
1626 | if (ours) | |
ea430986 | 1627 | close_nointr_nofail(fd); |
87f0e418 LP |
1628 | |
1629 | return -errno; | |
1630 | } | |
1631 | ||
acbb0225 | 1632 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1633 | assert(u); |
acbb0225 | 1634 | assert(w); |
87f0e418 | 1635 | |
acbb0225 | 1636 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1637 | return; |
1638 | ||
faf919f1 LP |
1639 | assert(w->type == WATCH_UNIT_TIMER); |
1640 | assert(w->data.unit == u); | |
1641 | assert(w->fd >= 0); | |
acbb0225 | 1642 | |
ac155bb8 | 1643 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
a16e1123 | 1644 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1645 | |
1646 | w->fd = -1; | |
1647 | w->type = WATCH_INVALID; | |
ea430986 | 1648 | w->data.unit = NULL; |
87f0e418 LP |
1649 | } |
1650 | ||
1651 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1652 | assert(u); | |
1653 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1654 | ||
1655 | switch (j) { | |
1656 | ||
1657 | case JOB_VERIFY_ACTIVE: | |
1658 | case JOB_START: | |
57339f47 | 1659 | case JOB_STOP: |
e0209d83 | 1660 | case JOB_NOP: |
87f0e418 LP |
1661 | return true; |
1662 | ||
87f0e418 LP |
1663 | case JOB_RESTART: |
1664 | case JOB_TRY_RESTART: | |
1665 | return unit_can_start(u); | |
1666 | ||
1667 | case JOB_RELOAD: | |
1668 | return unit_can_reload(u); | |
1669 | ||
1670 | case JOB_RELOAD_OR_START: | |
1671 | return unit_can_reload(u) && unit_can_start(u); | |
1672 | ||
1673 | default: | |
1674 | assert_not_reached("Invalid job type"); | |
1675 | } | |
1676 | } | |
1677 | ||
701cc384 | 1678 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1679 | |
1680 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1681 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1682 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1683 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1684 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1685 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 1686 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 1687 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 1688 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1689 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1690 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 1691 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 1692 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
1693 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1694 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1695 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1696 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1697 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 1698 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
1699 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
1700 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 1701 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 1702 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 1703 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
87f0e418 | 1704 | }; |
701cc384 | 1705 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1706 | |
1707 | assert(u); | |
1708 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1709 | assert(other); |
1710 | ||
9f151f29 LP |
1711 | u = unit_follow_merge(u); |
1712 | other = unit_follow_merge(other); | |
1713 | ||
87f0e418 LP |
1714 | /* We won't allow dependencies on ourselves. We will not |
1715 | * consider them an error however. */ | |
1716 | if (u == other) | |
1717 | return 0; | |
1718 | ||
ac155bb8 | 1719 | if ((r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1720 | return r; |
1721 | ||
5de9682c | 1722 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1723 | if ((r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) |
5de9682c LP |
1724 | return r; |
1725 | ||
701cc384 | 1726 | if (add_reference) |
ac155bb8 MS |
1727 | if ((r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || |
1728 | (r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
701cc384 | 1729 | return r; |
87f0e418 | 1730 | |
ac155bb8 | 1731 | if ((q = set_put(u->dependencies[d], other)) < 0) |
701cc384 | 1732 | return q; |
87f0e418 | 1733 | |
5de9682c | 1734 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1735 | if ((v = set_put(other->dependencies[inverse_table[d]], u)) < 0) { |
5de9682c LP |
1736 | r = v; |
1737 | goto fail; | |
1738 | } | |
701cc384 LP |
1739 | |
1740 | if (add_reference) { | |
ac155bb8 | 1741 | if ((w = set_put(u->dependencies[UNIT_REFERENCES], other)) < 0) { |
701cc384 LP |
1742 | r = w; |
1743 | goto fail; | |
1744 | } | |
1745 | ||
ac155bb8 | 1746 | if ((r = set_put(other->dependencies[UNIT_REFERENCED_BY], u)) < 0) |
701cc384 | 1747 | goto fail; |
87f0e418 LP |
1748 | } |
1749 | ||
c1e1601e | 1750 | unit_add_to_dbus_queue(u); |
87f0e418 | 1751 | return 0; |
701cc384 LP |
1752 | |
1753 | fail: | |
1754 | if (q > 0) | |
ac155bb8 | 1755 | set_remove(u->dependencies[d], other); |
701cc384 LP |
1756 | |
1757 | if (v > 0) | |
ac155bb8 | 1758 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
1759 | |
1760 | if (w > 0) | |
ac155bb8 | 1761 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
1762 | |
1763 | return r; | |
87f0e418 | 1764 | } |
0301abf4 | 1765 | |
2c966c03 LP |
1766 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1767 | int r; | |
1768 | ||
1769 | assert(u); | |
1770 | ||
1771 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1772 | return r; | |
1773 | ||
1774 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1775 | return r; | |
1776 | ||
1777 | return 0; | |
1778 | } | |
1779 | ||
9e2f7c11 LP |
1780 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1781 | char *s; | |
1782 | ||
1783 | assert(u); | |
1784 | assert(name || path); | |
8afbb8e1 | 1785 | assert(p); |
9e2f7c11 LP |
1786 | |
1787 | if (!name) | |
9eb977db | 1788 | name = path_get_file_name(path); |
9e2f7c11 LP |
1789 | |
1790 | if (!unit_name_is_template(name)) { | |
1791 | *p = NULL; | |
1792 | return name; | |
1793 | } | |
1794 | ||
ac155bb8 MS |
1795 | if (u->instance) |
1796 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 LP |
1797 | else { |
1798 | char *i; | |
1799 | ||
8afbb8e1 LP |
1800 | i = unit_name_to_prefix(u->id); |
1801 | if (!i) | |
9e2f7c11 LP |
1802 | return NULL; |
1803 | ||
1804 | s = unit_name_replace_instance(name, i); | |
1805 | free(i); | |
1806 | } | |
1807 | ||
1808 | if (!s) | |
1809 | return NULL; | |
1810 | ||
1811 | *p = s; | |
1812 | return s; | |
1813 | } | |
1814 | ||
701cc384 | 1815 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1816 | Unit *other; |
1817 | int r; | |
8afbb8e1 | 1818 | _cleanup_free_ char *s = NULL; |
09b6b09f | 1819 | |
9e2f7c11 LP |
1820 | assert(u); |
1821 | assert(name || path); | |
09b6b09f | 1822 | |
8afbb8e1 LP |
1823 | name = resolve_template(u, name, path, &s); |
1824 | if (!name) | |
9e2f7c11 | 1825 | return -ENOMEM; |
09b6b09f | 1826 | |
8afbb8e1 LP |
1827 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
1828 | if (r < 0) | |
1829 | return r; | |
9e2f7c11 | 1830 | |
8afbb8e1 | 1831 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
1832 | } |
1833 | ||
2c966c03 LP |
1834 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1835 | Unit *other; | |
1836 | int r; | |
1837 | char *s; | |
1838 | ||
1839 | assert(u); | |
1840 | assert(name || path); | |
1841 | ||
1842 | if (!(name = resolve_template(u, name, path, &s))) | |
1843 | return -ENOMEM; | |
1844 | ||
ac155bb8 | 1845 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1846 | goto finish; |
1847 | ||
1848 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1849 | ||
1850 | finish: | |
1851 | free(s); | |
1852 | return r; | |
1853 | } | |
1854 | ||
701cc384 | 1855 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1856 | Unit *other; |
1857 | int r; | |
9e2f7c11 | 1858 | char *s; |
bd77d0fc | 1859 | |
9e2f7c11 LP |
1860 | assert(u); |
1861 | assert(name || path); | |
bd77d0fc | 1862 | |
9e2f7c11 LP |
1863 | if (!(name = resolve_template(u, name, path, &s))) |
1864 | return -ENOMEM; | |
bd77d0fc | 1865 | |
ac155bb8 | 1866 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1867 | goto finish; |
1868 | ||
701cc384 | 1869 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1870 | |
1871 | finish: | |
1872 | free(s); | |
1873 | return r; | |
bd77d0fc LP |
1874 | } |
1875 | ||
2c966c03 LP |
1876 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1877 | Unit *other; | |
1878 | int r; | |
1879 | char *s; | |
1880 | ||
1881 | assert(u); | |
1882 | assert(name || path); | |
1883 | ||
1884 | if (!(name = resolve_template(u, name, path, &s))) | |
1885 | return -ENOMEM; | |
1886 | ||
ac155bb8 | 1887 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1888 | goto finish; |
1889 | ||
1890 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1891 | goto finish; | |
1892 | ||
1893 | finish: | |
1894 | free(s); | |
1895 | return r; | |
1896 | } | |
1897 | ||
0301abf4 LP |
1898 | int set_unit_path(const char *p) { |
1899 | char *cwd, *c; | |
1900 | int r; | |
1901 | ||
1902 | /* This is mostly for debug purposes */ | |
1903 | ||
1904 | if (path_is_absolute(p)) { | |
1905 | if (!(c = strdup(p))) | |
1906 | return -ENOMEM; | |
1907 | } else { | |
1908 | if (!(cwd = get_current_dir_name())) | |
1909 | return -errno; | |
1910 | ||
1911 | r = asprintf(&c, "%s/%s", cwd, p); | |
1912 | free(cwd); | |
1913 | ||
1914 | if (r < 0) | |
1915 | return -ENOMEM; | |
1916 | } | |
1917 | ||
036643a2 | 1918 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1919 | r = -errno; |
1920 | free(c); | |
1921 | return r; | |
1922 | } | |
1923 | ||
1924 | return 0; | |
1925 | } | |
88066b3a | 1926 | |
ea430986 | 1927 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
1928 | assert(u); |
1929 | ||
ac155bb8 | 1930 | if (!u->id) |
04ade7d2 LP |
1931 | return NULL; |
1932 | ||
48899192 | 1933 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
1934 | } |
1935 | ||
8e274523 | 1936 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
8e274523 LP |
1937 | int r; |
1938 | ||
1939 | assert(u); | |
1940 | assert(b); | |
35d2e7ec | 1941 | |
8e274523 LP |
1942 | assert(b->path); |
1943 | ||
e025b4c3 | 1944 | if (!b->controller) { |
246aa6dd LP |
1945 | b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
1946 | if (!b->controller) | |
1947 | return log_oom(); | |
35d2e7ec | 1948 | |
e025b4c3 LP |
1949 | b->ours = true; |
1950 | } | |
1951 | ||
8e274523 LP |
1952 | /* Ensure this hasn't been added yet */ |
1953 | assert(!b->unit); | |
1954 | ||
d686d8a9 LP |
1955 | if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
1956 | CGroupBonding *l; | |
8e274523 | 1957 | |
ac155bb8 | 1958 | l = hashmap_get(u->manager->cgroup_bondings, b->path); |
d686d8a9 LP |
1959 | LIST_PREPEND(CGroupBonding, by_path, l, b); |
1960 | ||
246aa6dd LP |
1961 | r = hashmap_replace(u->manager->cgroup_bondings, b->path, l); |
1962 | if (r < 0) { | |
d686d8a9 LP |
1963 | LIST_REMOVE(CGroupBonding, by_path, l, b); |
1964 | return r; | |
1965 | } | |
8e274523 LP |
1966 | } |
1967 | ||
ac155bb8 | 1968 | LIST_PREPEND(CGroupBonding, by_unit, u->cgroup_bondings, b); |
8e274523 LP |
1969 | b->unit = u; |
1970 | ||
1971 | return 0; | |
1972 | } | |
1973 | ||
41f9172f | 1974 | char *unit_default_cgroup_path(Unit *u) { |
013b87c0 LP |
1975 | assert(u); |
1976 | ||
ac155bb8 | 1977 | if (u->instance) { |
246aa6dd | 1978 | _cleanup_free_ char *t = NULL; |
013b87c0 | 1979 | |
ac155bb8 | 1980 | t = unit_name_template(u->id); |
cd0ed1db | 1981 | if (!t) |
4f2d528d LP |
1982 | return NULL; |
1983 | ||
246aa6dd | 1984 | return strjoin(u->manager->cgroup_hierarchy, "/", t, "/", u->instance, NULL); |
4f2d528d | 1985 | } else |
246aa6dd | 1986 | return strjoin(u->manager->cgroup_hierarchy, "/", u->id, NULL); |
013b87c0 LP |
1987 | } |
1988 | ||
246aa6dd | 1989 | int unit_add_cgroup_from_text(Unit *u, const char *name, bool overwrite, CGroupBonding **ret) { |
013b87c0 LP |
1990 | char *controller = NULL, *path = NULL; |
1991 | CGroupBonding *b = NULL; | |
e025b4c3 | 1992 | bool ours = false; |
8e274523 LP |
1993 | int r; |
1994 | ||
1995 | assert(u); | |
1996 | assert(name); | |
1997 | ||
246aa6dd LP |
1998 | r = cg_split_spec(name, &controller, &path); |
1999 | if (r < 0) | |
35d2e7ec | 2000 | return r; |
8e274523 | 2001 | |
e025b4c3 | 2002 | if (!path) { |
41f9172f | 2003 | path = unit_default_cgroup_path(u); |
e025b4c3 LP |
2004 | ours = true; |
2005 | } | |
013b87c0 | 2006 | |
e025b4c3 | 2007 | if (!controller) { |
55096547 | 2008 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
e025b4c3 LP |
2009 | ours = true; |
2010 | } | |
013b87c0 | 2011 | |
35d2e7ec LP |
2012 | if (!path || !controller) { |
2013 | free(path); | |
2014 | free(controller); | |
246aa6dd | 2015 | return log_oom(); |
8e274523 LP |
2016 | } |
2017 | ||
246aa6dd LP |
2018 | b = cgroup_bonding_find_list(u->cgroup_bondings, controller); |
2019 | if (b) { | |
2020 | if (streq(path, b->path)) { | |
2021 | free(path); | |
2022 | free(controller); | |
2023 | ||
2024 | if (ret) | |
2025 | *ret = b; | |
2026 | return 0; | |
2027 | } | |
2028 | ||
2029 | if (overwrite && !b->essential) { | |
2030 | free(controller); | |
2031 | ||
2032 | free(b->path); | |
2033 | b->path = path; | |
2034 | ||
2035 | b->ours = ours; | |
2036 | b->realized = false; | |
2037 | ||
2038 | if (ret) | |
2039 | *ret = b; | |
2040 | ||
2041 | return 1; | |
2042 | } | |
2043 | ||
013b87c0 | 2044 | r = -EEXIST; |
246aa6dd | 2045 | b = NULL; |
013b87c0 LP |
2046 | goto fail; |
2047 | } | |
8e274523 | 2048 | |
246aa6dd LP |
2049 | b = new0(CGroupBonding, 1); |
2050 | if (!b) { | |
8e274523 LP |
2051 | r = -ENOMEM; |
2052 | goto fail; | |
2053 | } | |
2054 | ||
013b87c0 LP |
2055 | b->controller = controller; |
2056 | b->path = path; | |
e025b4c3 LP |
2057 | b->ours = ours; |
2058 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
8e274523 | 2059 | |
246aa6dd LP |
2060 | r = unit_add_cgroup(u, b); |
2061 | if (r < 0) | |
8e274523 LP |
2062 | goto fail; |
2063 | ||
246aa6dd LP |
2064 | if (ret) |
2065 | *ret = b; | |
2066 | ||
2067 | return 1; | |
8e274523 LP |
2068 | |
2069 | fail: | |
013b87c0 LP |
2070 | free(path); |
2071 | free(controller); | |
8e274523 LP |
2072 | free(b); |
2073 | ||
2074 | return r; | |
2075 | } | |
2076 | ||
06d4c99a | 2077 | static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
d686d8a9 | 2078 | CGroupBonding *b = NULL; |
8e274523 LP |
2079 | int r = -ENOMEM; |
2080 | ||
2081 | assert(u); | |
2082 | ||
06d4c99a LP |
2083 | if (!controller) |
2084 | controller = SYSTEMD_CGROUP_CONTROLLER; | |
8e274523 | 2085 | |
ac155bb8 | 2086 | if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) |
06d4c99a | 2087 | return 0; |
8e274523 | 2088 | |
246aa6dd LP |
2089 | b = new0(CGroupBonding, 1); |
2090 | if (!b) | |
06d4c99a | 2091 | return -ENOMEM; |
8e274523 | 2092 | |
246aa6dd | 2093 | b->controller = strdup(controller); |
8755586e | 2094 | if (!b->controller) |
06d4c99a | 2095 | goto fail; |
d686d8a9 | 2096 | |
41f9172f LP |
2097 | b->path = unit_default_cgroup_path(u); |
2098 | if (!b->path) | |
06d4c99a | 2099 | goto fail; |
d686d8a9 | 2100 | |
06d4c99a LP |
2101 | b->ours = true; |
2102 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
d686d8a9 | 2103 | |
246aa6dd LP |
2104 | r = unit_add_cgroup(u, b); |
2105 | if (r < 0) | |
06d4c99a | 2106 | goto fail; |
8e274523 LP |
2107 | |
2108 | return 0; | |
2109 | ||
2110 | fail: | |
06d4c99a LP |
2111 | free(b->path); |
2112 | free(b->controller); | |
2113 | free(b); | |
8e274523 LP |
2114 | |
2115 | return r; | |
2116 | } | |
2117 | ||
06d4c99a | 2118 | int unit_add_default_cgroups(Unit *u) { |
ab1f0633 | 2119 | CGroupAttribute *a; |
06d4c99a LP |
2120 | char **c; |
2121 | int r; | |
ab1f0633 | 2122 | |
06d4c99a LP |
2123 | assert(u); |
2124 | ||
2125 | /* Adds in the default cgroups, if they weren't specified | |
2126 | * otherwise. */ | |
2127 | ||
ac155bb8 | 2128 | if (!u->manager->cgroup_hierarchy) |
df18d8c8 LP |
2129 | return 0; |
2130 | ||
246aa6dd LP |
2131 | r = unit_add_one_default_cgroup(u, NULL); |
2132 | if (r < 0) | |
06d4c99a LP |
2133 | return r; |
2134 | ||
ac155bb8 | 2135 | STRV_FOREACH(c, u->manager->default_controllers) |
ab1f0633 LP |
2136 | unit_add_one_default_cgroup(u, *c); |
2137 | ||
ac155bb8 | 2138 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) |
ab1f0633 | 2139 | unit_add_one_default_cgroup(u, a->controller); |
06d4c99a LP |
2140 | |
2141 | return 0; | |
2142 | } | |
2143 | ||
8e274523 LP |
2144 | CGroupBonding* unit_get_default_cgroup(Unit *u) { |
2145 | assert(u); | |
2146 | ||
246aa6dd | 2147 | return cgroup_bonding_find_list(u->cgroup_bondings, NULL); |
8e274523 LP |
2148 | } |
2149 | ||
246aa6dd LP |
2150 | int unit_add_cgroup_attribute( |
2151 | Unit *u, | |
2152 | const char *controller, | |
2153 | const char *name, | |
2154 | const char *value, | |
2155 | CGroupAttributeMapCallback map_callback, | |
2156 | CGroupAttribute **ret) { | |
2157 | ||
2158 | _cleanup_free_ char *c = NULL; | |
ab1f0633 | 2159 | CGroupAttribute *a; |
e884315e | 2160 | int r; |
ab1f0633 LP |
2161 | |
2162 | assert(u); | |
2163 | assert(name); | |
2164 | assert(value); | |
2165 | ||
2166 | if (!controller) { | |
e884315e LP |
2167 | r = cg_controller_from_attr(name, &c); |
2168 | if (r < 0) | |
ab1f0633 LP |
2169 | return -EINVAL; |
2170 | ||
ab1f0633 | 2171 | controller = c; |
e884315e LP |
2172 | } else { |
2173 | if (!filename_is_safe(name)) | |
2174 | return -EINVAL; | |
2175 | ||
2176 | if (!filename_is_safe(controller)) | |
2177 | return -EINVAL; | |
ab1f0633 LP |
2178 | } |
2179 | ||
e884315e | 2180 | if (!controller || streq(controller, SYSTEMD_CGROUP_CONTROLLER)) |
246aa6dd LP |
2181 | return -EINVAL; |
2182 | ||
2183 | a = cgroup_attribute_find_list(u->cgroup_attributes, controller, name); | |
2184 | if (a) { | |
2185 | char *v; | |
2186 | ||
2187 | if (streq(value, a->value)) { | |
2188 | if (ret) | |
2189 | *ret = a; | |
2190 | ||
2191 | return 0; | |
2192 | } | |
2193 | ||
2194 | v = strdup(value); | |
2195 | if (!v) | |
2196 | return -ENOMEM; | |
2197 | ||
2198 | free(a->value); | |
2199 | a->value = v; | |
2200 | ||
2201 | if (ret) | |
2202 | *ret = a; | |
2203 | ||
2204 | return 1; | |
ab1f0633 LP |
2205 | } |
2206 | ||
2207 | a = new0(CGroupAttribute, 1); | |
246aa6dd LP |
2208 | if (!a) |
2209 | return -ENOMEM; | |
ab1f0633 LP |
2210 | |
2211 | if (c) { | |
2212 | a->controller = c; | |
2213 | c = NULL; | |
2214 | } else | |
2215 | a->controller = strdup(controller); | |
2216 | ||
2217 | a->name = strdup(name); | |
2218 | a->value = strdup(value); | |
2219 | ||
2220 | if (!a->controller || !a->name || !a->value) { | |
2221 | free(a->controller); | |
2222 | free(a->name); | |
2223 | free(a->value); | |
2224 | free(a); | |
2225 | ||
2226 | return -ENOMEM; | |
2227 | } | |
2228 | ||
2229 | a->map_callback = map_callback; | |
246aa6dd | 2230 | a->unit = u; |
ab1f0633 | 2231 | |
ac155bb8 | 2232 | LIST_PREPEND(CGroupAttribute, by_unit, u->cgroup_attributes, a); |
ab1f0633 | 2233 | |
246aa6dd LP |
2234 | if (ret) |
2235 | *ret = a; | |
ab1f0633 | 2236 | |
246aa6dd | 2237 | return 1; |
ab1f0633 LP |
2238 | } |
2239 | ||
f6ff8c29 LP |
2240 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
2241 | char *t; | |
2242 | int r; | |
2243 | ||
2244 | assert(u); | |
2245 | assert(type); | |
2246 | assert(_found); | |
2247 | ||
ac155bb8 | 2248 | if (!(t = unit_name_change_suffix(u->id, type))) |
f6ff8c29 LP |
2249 | return -ENOMEM; |
2250 | ||
2251 | assert(!unit_has_name(u, t)); | |
2252 | ||
ac155bb8 | 2253 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
2254 | free(t); |
2255 | ||
9e2f7c11 | 2256 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2257 | |
2258 | return r; | |
2259 | } | |
2260 | ||
a16e1123 LP |
2261 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
2262 | Unit *found; | |
2263 | char *t; | |
2264 | ||
2265 | assert(u); | |
2266 | assert(type); | |
2267 | assert(_found); | |
2268 | ||
ac155bb8 | 2269 | if (!(t = unit_name_change_suffix(u->id, type))) |
a16e1123 LP |
2270 | return -ENOMEM; |
2271 | ||
2272 | assert(!unit_has_name(u, t)); | |
2273 | ||
ac155bb8 | 2274 | found = manager_get_unit(u->manager, t); |
a16e1123 LP |
2275 | free(t); |
2276 | ||
2277 | if (!found) | |
2278 | return -ENOENT; | |
2279 | ||
2280 | *_found = found; | |
2281 | return 0; | |
2282 | } | |
2283 | ||
05e343b7 LP |
2284 | int unit_watch_bus_name(Unit *u, const char *name) { |
2285 | assert(u); | |
2286 | assert(name); | |
2287 | ||
2288 | /* Watch a specific name on the bus. We only support one unit | |
2289 | * watching each name for now. */ | |
2290 | ||
ac155bb8 | 2291 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2292 | } |
2293 | ||
2294 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2295 | assert(u); | |
2296 | assert(name); | |
2297 | ||
ac155bb8 | 2298 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2299 | } |
2300 | ||
a16e1123 LP |
2301 | bool unit_can_serialize(Unit *u) { |
2302 | assert(u); | |
2303 | ||
2304 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2305 | } | |
2306 | ||
6b78f9b4 | 2307 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2308 | int r; |
2309 | ||
2310 | assert(u); | |
2311 | assert(f); | |
2312 | assert(fds); | |
2313 | ||
2314 | if (!unit_can_serialize(u)) | |
2315 | return 0; | |
2316 | ||
2317 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
2318 | return r; | |
2319 | ||
cca098b0 | 2320 | |
6b78f9b4 LP |
2321 | if (serialize_jobs) { |
2322 | if (u->job) { | |
2323 | fprintf(f, "job\n"); | |
2324 | job_serialize(u->job, f, fds); | |
2325 | } | |
2326 | ||
2327 | if (u->nop_job) { | |
2328 | fprintf(f, "job\n"); | |
2329 | job_serialize(u->nop_job, f, fds); | |
2330 | } | |
e0209d83 MS |
2331 | } |
2332 | ||
ac155bb8 MS |
2333 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2334 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2335 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2336 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2337 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
2791a8f8 | 2338 | |
ac155bb8 MS |
2339 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2340 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2341 | |
a16e1123 LP |
2342 | /* End marker */ |
2343 | fputc('\n', f); | |
2344 | return 0; | |
2345 | } | |
2346 | ||
2347 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2348 | va_list ap; | |
2349 | ||
2350 | assert(u); | |
2351 | assert(f); | |
2352 | assert(key); | |
2353 | assert(format); | |
2354 | ||
2355 | fputs(key, f); | |
2356 | fputc('=', f); | |
2357 | ||
2358 | va_start(ap, format); | |
2359 | vfprintf(f, format, ap); | |
2360 | va_end(ap); | |
2361 | ||
2362 | fputc('\n', f); | |
2363 | } | |
2364 | ||
2365 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2366 | assert(u); | |
2367 | assert(f); | |
2368 | assert(key); | |
2369 | assert(value); | |
2370 | ||
2371 | fprintf(f, "%s=%s\n", key, value); | |
2372 | } | |
2373 | ||
2374 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2375 | int r; | |
2376 | ||
2377 | assert(u); | |
2378 | assert(f); | |
2379 | assert(fds); | |
2380 | ||
2381 | if (!unit_can_serialize(u)) | |
2382 | return 0; | |
2383 | ||
2384 | for (;;) { | |
20c03b7b | 2385 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2386 | size_t k; |
2387 | ||
2388 | if (!fgets(line, sizeof(line), f)) { | |
2389 | if (feof(f)) | |
2390 | return 0; | |
2391 | return -errno; | |
2392 | } | |
2393 | ||
10f8e83c | 2394 | char_array_0(line); |
a16e1123 LP |
2395 | l = strstrip(line); |
2396 | ||
2397 | /* End marker */ | |
2398 | if (l[0] == 0) | |
2399 | return 0; | |
2400 | ||
2401 | k = strcspn(l, "="); | |
2402 | ||
2403 | if (l[k] == '=') { | |
2404 | l[k] = 0; | |
2405 | v = l+k+1; | |
2406 | } else | |
2407 | v = l+k; | |
2408 | ||
cca098b0 | 2409 | if (streq(l, "job")) { |
39a18c60 MS |
2410 | if (v[0] == '\0') { |
2411 | /* new-style serialized job */ | |
2412 | Job *j = job_new_raw(u); | |
2413 | if (!j) | |
2414 | return -ENOMEM; | |
2415 | ||
2416 | r = job_deserialize(j, f, fds); | |
2417 | if (r < 0) { | |
2418 | job_free(j); | |
2419 | return r; | |
2420 | } | |
cca098b0 | 2421 | |
39a18c60 MS |
2422 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2423 | if (r < 0) { | |
2424 | job_free(j); | |
2425 | return r; | |
2426 | } | |
e0209d83 MS |
2427 | |
2428 | r = job_install_deserialized(j); | |
2429 | if (r < 0) { | |
2430 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2431 | job_free(j); | |
2432 | return r; | |
2433 | } | |
39a18c60 MS |
2434 | } else { |
2435 | /* legacy */ | |
2436 | JobType type = job_type_from_string(v); | |
2437 | if (type < 0) | |
2438 | log_debug("Failed to parse job type value %s", v); | |
2439 | else | |
2440 | u->deserialized_job = type; | |
2441 | } | |
cca098b0 | 2442 | continue; |
8aaf019b | 2443 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2444 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2445 | continue; |
2446 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2447 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2448 | continue; |
2449 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2450 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2451 | continue; |
2452 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2453 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2454 | continue; |
2791a8f8 | 2455 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2456 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 LP |
2457 | continue; |
2458 | } else if (streq(l, "condition-result")) { | |
2459 | int b; | |
2460 | ||
2461 | if ((b = parse_boolean(v)) < 0) | |
2462 | log_debug("Failed to parse condition result value %s", v); | |
2463 | else | |
ac155bb8 | 2464 | u->condition_result = b; |
efbac6d2 LP |
2465 | |
2466 | continue; | |
8aaf019b | 2467 | } |
cca098b0 | 2468 | |
a16e1123 LP |
2469 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
2470 | return r; | |
2471 | } | |
2472 | } | |
2473 | ||
6e2ef85b LP |
2474 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2475 | Unit *device; | |
2476 | char *e; | |
2477 | int r; | |
2478 | ||
2479 | assert(u); | |
2480 | ||
2481 | if (!what) | |
2482 | return 0; | |
2483 | ||
2484 | /* Adds in links to the device node that this unit is based on */ | |
2485 | ||
8407a5d0 | 2486 | if (!is_device_path(what)) |
6e2ef85b LP |
2487 | return 0; |
2488 | ||
35eb6b12 LP |
2489 | e = unit_name_from_path(what, ".device"); |
2490 | if (!e) | |
6e2ef85b LP |
2491 | return -ENOMEM; |
2492 | ||
ac155bb8 | 2493 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b | 2494 | free(e); |
6e2ef85b LP |
2495 | if (r < 0) |
2496 | return r; | |
2497 | ||
faa368e3 LP |
2498 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true); |
2499 | if (r < 0) | |
6e2ef85b LP |
2500 | return r; |
2501 | ||
faa368e3 LP |
2502 | if (wants) { |
2503 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2504 | if (r < 0) | |
6e2ef85b | 2505 | return r; |
faa368e3 | 2506 | } |
6e2ef85b LP |
2507 | |
2508 | return 0; | |
2509 | } | |
a16e1123 | 2510 | |
cca098b0 LP |
2511 | int unit_coldplug(Unit *u) { |
2512 | int r; | |
2513 | ||
2514 | assert(u); | |
2515 | ||
2516 | if (UNIT_VTABLE(u)->coldplug) | |
2517 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2518 | return r; | |
2519 | ||
39a18c60 MS |
2520 | if (u->job) { |
2521 | r = job_coldplug(u->job); | |
2522 | if (r < 0) | |
2523 | return r; | |
2524 | } else if (u->deserialized_job >= 0) { | |
2525 | /* legacy */ | |
2526 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2527 | if (r < 0) | |
cca098b0 LP |
2528 | return r; |
2529 | ||
ac155bb8 | 2530 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2531 | } |
2532 | ||
2533 | return 0; | |
2534 | } | |
2535 | ||
5831e9b7 | 2536 | void unit_status_printf(Unit *u, const char *status, const char *format, ...) { |
9e58ff9c LP |
2537 | va_list ap; |
2538 | ||
2539 | assert(u); | |
2540 | assert(format); | |
2541 | ||
ac155bb8 | 2542 | if (!manager_get_show_status(u->manager)) |
9e58ff9c LP |
2543 | return; |
2544 | ||
ac155bb8 | 2545 | if (!manager_is_booting_or_shutting_down(u->manager)) |
9e58ff9c LP |
2546 | return; |
2547 | ||
2548 | va_start(ap, format); | |
67e5cc4f | 2549 | status_vprintf(status, true, format, ap); |
9e58ff9c LP |
2550 | va_end(ap); |
2551 | } | |
2552 | ||
45fb0699 | 2553 | bool unit_need_daemon_reload(Unit *u) { |
1b64d026 LP |
2554 | struct stat st; |
2555 | ||
45fb0699 LP |
2556 | assert(u); |
2557 | ||
ac155bb8 | 2558 | if (u->fragment_path) { |
5f4b19f4 | 2559 | zero(st); |
ac155bb8 | 2560 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2561 | /* What, cannot access this anymore? */ |
2562 | return true; | |
45fb0699 | 2563 | |
ac155bb8 MS |
2564 | if (u->fragment_mtime > 0 && |
2565 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2566 | return true; |
2567 | } | |
2568 | ||
1b64d026 LP |
2569 | if (u->source_path) { |
2570 | zero(st); | |
2571 | if (stat(u->source_path, &st) < 0) | |
2572 | return true; | |
2573 | ||
2574 | if (u->source_mtime > 0 && | |
2575 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2576 | return true; | |
2577 | } | |
5f4b19f4 LP |
2578 | |
2579 | return false; | |
45fb0699 LP |
2580 | } |
2581 | ||
fdf20a31 | 2582 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2583 | assert(u); |
2584 | ||
fdf20a31 MM |
2585 | if (UNIT_VTABLE(u)->reset_failed) |
2586 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2587 | } |
2588 | ||
a7f241db LP |
2589 | Unit *unit_following(Unit *u) { |
2590 | assert(u); | |
2591 | ||
2592 | if (UNIT_VTABLE(u)->following) | |
2593 | return UNIT_VTABLE(u)->following(u); | |
2594 | ||
2595 | return NULL; | |
2596 | } | |
2597 | ||
18ffdfda LP |
2598 | bool unit_pending_inactive(Unit *u) { |
2599 | assert(u); | |
2600 | ||
2601 | /* Returns true if the unit is inactive or going down */ | |
2602 | ||
2603 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
2604 | return true; | |
2605 | ||
ac155bb8 | 2606 | if (u->job && u->job->type == JOB_STOP) |
18ffdfda LP |
2607 | return true; |
2608 | ||
2609 | return false; | |
2610 | } | |
2611 | ||
f976f3f6 LP |
2612 | bool unit_pending_active(Unit *u) { |
2613 | assert(u); | |
2614 | ||
f60c2665 | 2615 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2616 | |
2617 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2618 | return true; | |
2619 | ||
ac155bb8 MS |
2620 | if (u->job && |
2621 | (u->job->type == JOB_START || | |
2622 | u->job->type == JOB_RELOAD_OR_START || | |
2623 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2624 | return true; |
2625 | ||
2626 | return false; | |
2627 | } | |
2628 | ||
c74f17d9 | 2629 | int unit_kill(Unit *u, KillWho w, int signo, DBusError *error) { |
8a0867d6 LP |
2630 | assert(u); |
2631 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2632 | assert(signo > 0); |
2633 | assert(signo < _NSIG); | |
2634 | ||
8a0867d6 LP |
2635 | if (!UNIT_VTABLE(u)->kill) |
2636 | return -ENOTSUP; | |
2637 | ||
c74f17d9 | 2638 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2639 | } |
2640 | ||
6210e7fc LP |
2641 | int unit_following_set(Unit *u, Set **s) { |
2642 | assert(u); | |
2643 | assert(s); | |
2644 | ||
2645 | if (UNIT_VTABLE(u)->following_set) | |
2646 | return UNIT_VTABLE(u)->following_set(u, s); | |
2647 | ||
2648 | *s = NULL; | |
2649 | return 0; | |
2650 | } | |
2651 | ||
a4375746 LP |
2652 | UnitFileState unit_get_unit_file_state(Unit *u) { |
2653 | assert(u); | |
2654 | ||
ac155bb8 MS |
2655 | if (u->unit_file_state < 0 && u->fragment_path) |
2656 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 2657 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
9eb977db | 2658 | NULL, path_get_file_name(u->fragment_path)); |
a4375746 | 2659 | |
ac155bb8 | 2660 | return u->unit_file_state; |
a4375746 LP |
2661 | } |
2662 | ||
57020a3a LP |
2663 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
2664 | assert(ref); | |
2665 | assert(u); | |
2666 | ||
2667 | if (ref->unit) | |
2668 | unit_ref_unset(ref); | |
2669 | ||
2670 | ref->unit = u; | |
ac155bb8 | 2671 | LIST_PREPEND(UnitRef, refs, u->refs, ref); |
57020a3a LP |
2672 | return u; |
2673 | } | |
2674 | ||
2675 | void unit_ref_unset(UnitRef *ref) { | |
2676 | assert(ref); | |
2677 | ||
2678 | if (!ref->unit) | |
2679 | return; | |
2680 | ||
ac155bb8 | 2681 | LIST_REMOVE(UnitRef, refs, ref->unit->refs, ref); |
57020a3a LP |
2682 | ref->unit = NULL; |
2683 | } | |
2684 | ||
7c8fa05c LP |
2685 | int unit_add_one_mount_link(Unit *u, Mount *m) { |
2686 | char **i; | |
2687 | ||
2688 | assert(u); | |
2689 | assert(m); | |
2690 | ||
2691 | if (u->load_state != UNIT_LOADED || | |
2692 | UNIT(m)->load_state != UNIT_LOADED) | |
2693 | return 0; | |
2694 | ||
2695 | STRV_FOREACH(i, u->requires_mounts_for) { | |
2696 | ||
2697 | if (UNIT(m) == u) | |
2698 | continue; | |
2699 | ||
2700 | if (!path_startswith(*i, m->where)) | |
2701 | continue; | |
2702 | ||
2703 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true); | |
2704 | } | |
2705 | ||
2706 | return 0; | |
2707 | } | |
2708 | ||
2709 | int unit_add_mount_links(Unit *u) { | |
2710 | Unit *other; | |
2711 | int r; | |
2712 | ||
2713 | assert(u); | |
2714 | ||
2715 | LIST_FOREACH(units_by_type, other, u->manager->units_by_type[UNIT_MOUNT]) { | |
2716 | r = unit_add_one_mount_link(u, MOUNT(other)); | |
2717 | if (r < 0) | |
2718 | return r; | |
2719 | } | |
2720 | ||
2721 | return 0; | |
2722 | } | |
2723 | ||
cba6e062 LP |
2724 | int unit_exec_context_defaults(Unit *u, ExecContext *c) { |
2725 | unsigned i; | |
2726 | int r; | |
2727 | ||
e06c73cc LP |
2728 | assert(u); |
2729 | assert(c); | |
2730 | ||
cba6e062 | 2731 | /* This only copies in the ones that need memory */ |
e06c73cc | 2732 | |
cba6e062 LP |
2733 | for (i = 0; i < RLIMIT_NLIMITS; i++) |
2734 | if (u->manager->rlimit[i] && !c->rlimit[i]) { | |
2735 | c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
2736 | if (!c->rlimit[i]) | |
2737 | return -ENOMEM; | |
2738 | } | |
2739 | ||
67445f4e | 2740 | if (u->manager->running_as == SYSTEMD_USER && |
cba6e062 | 2741 | !c->working_directory) { |
e06c73cc | 2742 | |
cba6e062 LP |
2743 | r = get_home_dir(&c->working_directory); |
2744 | if (r < 0) | |
2745 | return r; | |
2746 | } | |
2747 | ||
2748 | return 0; | |
e06c73cc LP |
2749 | } |
2750 | ||
3ef63c31 LP |
2751 | ExecContext *unit_get_exec_context(Unit *u) { |
2752 | size_t offset; | |
2753 | assert(u); | |
2754 | ||
2755 | offset = UNIT_VTABLE(u)->exec_context_offset; | |
2756 | if (offset <= 0) | |
2757 | return NULL; | |
2758 | ||
2759 | return (ExecContext*) ((uint8_t*) u + offset); | |
2760 | } | |
2761 | ||
71645aca LP |
2762 | int unit_write_drop_in(Unit *u, bool runtime, const char *name, const char *data) { |
2763 | _cleanup_free_ char *p = NULL, *q = NULL; | |
2764 | assert(u); | |
2765 | ||
2766 | if (u->manager->running_as != SYSTEMD_SYSTEM) | |
2767 | return -ENOTSUP; | |
2768 | ||
2769 | if (!filename_is_safe(name)) | |
2770 | return -EINVAL; | |
2771 | ||
6d3a7390 | 2772 | p = strjoin(runtime ? "/run/systemd/system/" : "/etc/systemd/system/", u->id, ".d", NULL); |
71645aca LP |
2773 | if (!p) |
2774 | return -ENOMEM; | |
2775 | ||
2776 | q = strjoin(p, "/50-", name, ".conf", NULL); | |
2777 | if (!q) | |
2778 | return -ENOMEM; | |
2779 | ||
2780 | mkdir_p(p, 0755); | |
2781 | return write_one_line_file_atomic(q, data); | |
2782 | } | |
2783 | ||
2784 | int unit_remove_drop_in(Unit *u, bool runtime, const char *name) { | |
2785 | _cleanup_free_ char *p = NULL, *q = NULL; | |
2786 | ||
2787 | assert(u); | |
2788 | ||
2789 | if (u->manager->running_as != SYSTEMD_SYSTEM) | |
2790 | return -ENOTSUP; | |
2791 | ||
2792 | if (!filename_is_safe(name)) | |
2793 | return -EINVAL; | |
2794 | ||
6d3a7390 | 2795 | p = strjoin(runtime ? "/run/systemd/system/" : "/etc/systemd/system/", u->id, ".d", NULL); |
71645aca LP |
2796 | if (!p) |
2797 | return -ENOMEM; | |
2798 | ||
2799 | q = strjoin(p, "/50-", name, ".conf", NULL); | |
2800 | if (!q) | |
2801 | return -ENOMEM; | |
2802 | ||
2803 | if (unlink(q) < 0) | |
2804 | return -errno; | |
2805 | ||
2806 | rmdir(p); | |
2807 | return 0; | |
2808 | } | |
2809 | ||
cd2086fe LP |
2810 | int unit_kill_context( |
2811 | Unit *u, | |
2812 | KillContext *c, | |
2813 | bool sigkill, | |
2814 | pid_t main_pid, | |
2815 | pid_t control_pid, | |
2816 | bool main_pid_alien) { | |
2817 | ||
2818 | int sig, wait_for_exit = 0, r; | |
2819 | ||
2820 | assert(u); | |
2821 | assert(c); | |
2822 | ||
2823 | if (c->kill_mode == KILL_NONE) | |
2824 | return 0; | |
2825 | ||
2826 | sig = sigkill ? SIGKILL : c->kill_signal; | |
2827 | ||
2828 | if (main_pid > 0) { | |
2829 | r = kill_and_sigcont(main_pid, sig); | |
2830 | ||
2831 | if (r < 0 && r != -ESRCH) { | |
2832 | _cleanup_free_ char *comm = NULL; | |
2833 | get_process_comm(main_pid, &comm); | |
2834 | ||
2835 | log_warning_unit(u->id, "Failed to kill main process %li (%s): %s", | |
2836 | (long) main_pid, strna(comm), strerror(-r)); | |
2837 | } else | |
2838 | wait_for_exit = !main_pid_alien; | |
2839 | } | |
2840 | ||
2841 | if (control_pid > 0) { | |
2842 | r = kill_and_sigcont(control_pid, sig); | |
2843 | ||
2844 | if (r < 0 && r != -ESRCH) { | |
2845 | _cleanup_free_ char *comm = NULL; | |
2846 | get_process_comm(control_pid, &comm); | |
2847 | ||
2848 | log_warning_unit(u->id, | |
2849 | "Failed to kill control process %li (%s): %s", | |
2850 | (long) control_pid, strna(comm), strerror(-r)); | |
2851 | } else | |
2852 | wait_for_exit = true; | |
2853 | } | |
2854 | ||
2855 | if (c->kill_mode == KILL_CONTROL_GROUP) { | |
2856 | _cleanup_set_free_ Set *pid_set = NULL; | |
2857 | ||
2858 | pid_set = set_new(trivial_hash_func, trivial_compare_func); | |
2859 | if (!pid_set) | |
2860 | return -ENOMEM; | |
2861 | ||
2862 | /* Exclude the main/control pids from being killed via the cgroup */ | |
2863 | if (main_pid > 0) { | |
2864 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
2865 | if (r < 0) | |
2866 | return r; | |
2867 | } | |
2868 | ||
2869 | if (control_pid > 0) { | |
2870 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
2871 | if (r < 0) | |
2872 | return r; | |
2873 | } | |
2874 | ||
2875 | r = cgroup_bonding_kill_list(u->cgroup_bondings, sig, true, false, pid_set, NULL); | |
2876 | if (r < 0) { | |
2877 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
2878 | log_warning_unit(u->id, "Failed to kill control group: %s", strerror(-r)); | |
2879 | } else if (r > 0) | |
2880 | wait_for_exit = true; | |
2881 | } | |
2882 | ||
2883 | return wait_for_exit; | |
2884 | } | |
2885 | ||
94f04347 LP |
2886 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
2887 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2888 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2889 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2890 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2891 | [UNIT_ACTIVATING] = "activating", |
2892 | [UNIT_DEACTIVATING] = "deactivating" | |
2893 | }; | |
2894 | ||
2895 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2896 | ||
2897 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2898 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2899 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 | 2900 | [UNIT_REQUISITE] = "Requisite", |
9e2f7c11 | 2901 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
ac6a4abe MS |
2902 | [UNIT_WANTS] = "Wants", |
2903 | [UNIT_BINDS_TO] = "BindsTo", | |
2904 | [UNIT_PART_OF] = "PartOf", | |
94f04347 | 2905 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2906 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 | 2907 | [UNIT_WANTED_BY] = "WantedBy", |
ac6a4abe MS |
2908 | [UNIT_BOUND_BY] = "BoundBy", |
2909 | [UNIT_CONSISTS_OF] = "ConsistsOf", | |
94f04347 | 2910 | [UNIT_CONFLICTS] = "Conflicts", |
69dd2852 | 2911 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
94f04347 LP |
2912 | [UNIT_BEFORE] = "Before", |
2913 | [UNIT_AFTER] = "After", | |
57020a3a LP |
2914 | [UNIT_ON_FAILURE] = "OnFailure", |
2915 | [UNIT_TRIGGERS] = "Triggers", | |
4dcc1cb4 | 2916 | [UNIT_TRIGGERED_BY] = "TriggeredBy", |
7f2cddae | 2917 | [UNIT_PROPAGATES_RELOAD_TO] = "PropagatesReloadTo", |
ac6a4abe MS |
2918 | [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom", |
2919 | [UNIT_REFERENCES] = "References", | |
2920 | [UNIT_REFERENCED_BY] = "ReferencedBy", | |
94f04347 LP |
2921 | }; |
2922 | ||
2923 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |