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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" |
71645aca | 47 | #include "mkdir.h" |
a5c32cff HH |
48 | #include "label.h" |
49 | #include "fileio-label.h" | |
814cc562 | 50 | #include "bus-errors.h" |
87f0e418 LP |
51 | |
52 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
53 | [UNIT_SERVICE] = &service_vtable, | |
54 | [UNIT_TIMER] = &timer_vtable, | |
55 | [UNIT_SOCKET] = &socket_vtable, | |
56 | [UNIT_TARGET] = &target_vtable, | |
57 | [UNIT_DEVICE] = &device_vtable, | |
58 | [UNIT_MOUNT] = &mount_vtable, | |
59 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 60 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 | 61 | [UNIT_SWAP] = &swap_vtable, |
a016b922 | 62 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
63 | [UNIT_SLICE] = &slice_vtable, |
64 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
65 | }; |
66 | ||
7d17cfbc | 67 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
68 | Unit *u; |
69 | ||
70 | assert(m); | |
ac155bb8 | 71 | assert(size >= sizeof(Unit)); |
87f0e418 | 72 | |
7d17cfbc MS |
73 | u = malloc0(size); |
74 | if (!u) | |
87f0e418 LP |
75 | return NULL; |
76 | ||
ac155bb8 MS |
77 | u->names = set_new(string_hash_func, string_compare_func); |
78 | if (!u->names) { | |
87f0e418 LP |
79 | free(u); |
80 | return NULL; | |
81 | } | |
82 | ||
ac155bb8 MS |
83 | u->manager = m; |
84 | u->type = _UNIT_TYPE_INVALID; | |
85 | u->deserialized_job = _JOB_TYPE_INVALID; | |
86 | u->default_dependencies = true; | |
87 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
87f0e418 LP |
88 | |
89 | return u; | |
90 | } | |
91 | ||
f278026d LP |
92 | bool unit_has_name(Unit *u, const char *name) { |
93 | assert(u); | |
94 | assert(name); | |
95 | ||
ac155bb8 | 96 | return !!set_get(u->names, (char*) name); |
f278026d LP |
97 | } |
98 | ||
87f0e418 LP |
99 | int unit_add_name(Unit *u, const char *text) { |
100 | UnitType t; | |
276c3e78 | 101 | char *s, *i = NULL; |
87f0e418 LP |
102 | int r; |
103 | ||
104 | assert(u); | |
105 | assert(text); | |
106 | ||
9e2f7c11 | 107 | if (unit_name_is_template(text)) { |
ac155bb8 | 108 | if (!u->instance) |
9e2f7c11 | 109 | return -EINVAL; |
87f0e418 | 110 | |
ac155bb8 | 111 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
112 | } else |
113 | s = strdup(text); | |
87f0e418 | 114 | |
9e2f7c11 LP |
115 | if (!s) |
116 | return -ENOMEM; | |
87f0e418 | 117 | |
b9c0d441 | 118 | if (!unit_name_is_valid(s, false)) { |
9e2f7c11 LP |
119 | r = -EINVAL; |
120 | goto fail; | |
121 | } | |
e537352b | 122 | |
9e2f7c11 | 123 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 124 | |
ac155bb8 | 125 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) { |
9e2f7c11 LP |
126 | r = -EINVAL; |
127 | goto fail; | |
128 | } | |
87f0e418 | 129 | |
9e2f7c11 LP |
130 | if ((r = unit_name_to_instance(s, &i)) < 0) |
131 | goto fail; | |
87f0e418 | 132 | |
796ba554 LP |
133 | if (i && unit_vtable[t]->no_instances) { |
134 | r = -EINVAL; | |
9e2f7c11 | 135 | goto fail; |
796ba554 | 136 | } |
9e2f7c11 | 137 | |
276c3e78 LP |
138 | /* Ensure that this unit is either instanced or not instanced, |
139 | * but not both. */ | |
ac155bb8 | 140 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) { |
9e2f7c11 LP |
141 | r = -EINVAL; |
142 | goto fail; | |
143 | } | |
144 | ||
145 | if (unit_vtable[t]->no_alias && | |
ac155bb8 MS |
146 | !set_isempty(u->names) && |
147 | !set_get(u->names, s)) { | |
9e2f7c11 LP |
148 | r = -EEXIST; |
149 | goto fail; | |
150 | } | |
151 | ||
ac155bb8 | 152 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) { |
4f0f902f LP |
153 | r = -E2BIG; |
154 | goto fail; | |
155 | } | |
156 | ||
ac155bb8 | 157 | if ((r = set_put(u->names, s)) < 0) { |
9e2f7c11 LP |
158 | if (r == -EEXIST) |
159 | r = 0; | |
160 | goto fail; | |
87f0e418 LP |
161 | } |
162 | ||
ac155bb8 MS |
163 | if ((r = hashmap_put(u->manager->units, s, u)) < 0) { |
164 | set_remove(u->names, s); | |
9e2f7c11 | 165 | goto fail; |
87f0e418 LP |
166 | } |
167 | ||
ac155bb8 | 168 | if (u->type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 169 | |
ac155bb8 MS |
170 | u->type = t; |
171 | u->id = s; | |
172 | u->instance = i; | |
9e2f7c11 | 173 | |
ac155bb8 | 174 | LIST_PREPEND(Unit, units_by_type, u->manager->units_by_type[t], u); |
e537352b LP |
175 | |
176 | if (UNIT_VTABLE(u)->init) | |
177 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
178 | } else |
179 | free(i); | |
87f0e418 | 180 | |
c1e1601e | 181 | unit_add_to_dbus_queue(u); |
87f0e418 | 182 | return 0; |
9e2f7c11 LP |
183 | |
184 | fail: | |
185 | free(s); | |
186 | free(i); | |
187 | ||
188 | return r; | |
87f0e418 LP |
189 | } |
190 | ||
0ae97ec1 | 191 | int unit_choose_id(Unit *u, const char *name) { |
276c3e78 LP |
192 | char *s, *t = NULL, *i; |
193 | int r; | |
0ae97ec1 LP |
194 | |
195 | assert(u); | |
196 | assert(name); | |
197 | ||
9e2f7c11 LP |
198 | if (unit_name_is_template(name)) { |
199 | ||
ac155bb8 | 200 | if (!u->instance) |
9e2f7c11 LP |
201 | return -EINVAL; |
202 | ||
ac155bb8 | 203 | if (!(t = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
204 | return -ENOMEM; |
205 | ||
206 | name = t; | |
207 | } | |
208 | ||
0ae97ec1 | 209 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 210 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 211 | free(t); |
0ae97ec1 | 212 | |
9e2f7c11 | 213 | if (!s) |
0ae97ec1 LP |
214 | return -ENOENT; |
215 | ||
276c3e78 LP |
216 | if ((r = unit_name_to_instance(s, &i)) < 0) |
217 | return r; | |
218 | ||
ac155bb8 | 219 | u->id = s; |
276c3e78 | 220 | |
ac155bb8 MS |
221 | free(u->instance); |
222 | u->instance = i; | |
276c3e78 | 223 | |
c1e1601e | 224 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 225 | |
0ae97ec1 LP |
226 | return 0; |
227 | } | |
228 | ||
f50e0a01 LP |
229 | int unit_set_description(Unit *u, const char *description) { |
230 | char *s; | |
231 | ||
232 | assert(u); | |
233 | ||
8aec412f LP |
234 | if (isempty(description)) |
235 | s = NULL; | |
236 | else { | |
237 | s = strdup(description); | |
238 | if (!s) | |
239 | return -ENOMEM; | |
240 | } | |
f50e0a01 | 241 | |
ac155bb8 MS |
242 | free(u->description); |
243 | u->description = s; | |
c1e1601e LP |
244 | |
245 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
246 | return 0; |
247 | } | |
248 | ||
701cc384 LP |
249 | bool unit_check_gc(Unit *u) { |
250 | assert(u); | |
251 | ||
ac155bb8 | 252 | if (u->load_state == UNIT_STUB) |
b86d44e5 LP |
253 | return true; |
254 | ||
701cc384 LP |
255 | if (UNIT_VTABLE(u)->no_gc) |
256 | return true; | |
257 | ||
ac155bb8 | 258 | if (u->no_gc) |
6c073082 LP |
259 | return true; |
260 | ||
ac155bb8 | 261 | if (u->job) |
701cc384 LP |
262 | return true; |
263 | ||
e0209d83 MS |
264 | if (u->nop_job) |
265 | return true; | |
266 | ||
701cc384 LP |
267 | if (unit_active_state(u) != UNIT_INACTIVE) |
268 | return true; | |
269 | ||
9d576438 LP |
270 | if (u->refs) |
271 | return true; | |
272 | ||
701cc384 LP |
273 | if (UNIT_VTABLE(u)->check_gc) |
274 | if (UNIT_VTABLE(u)->check_gc(u)) | |
275 | return true; | |
276 | ||
277 | return false; | |
278 | } | |
279 | ||
87f0e418 LP |
280 | void unit_add_to_load_queue(Unit *u) { |
281 | assert(u); | |
ac155bb8 | 282 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 283 | |
ac155bb8 | 284 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
285 | return; |
286 | ||
ac155bb8 MS |
287 | LIST_PREPEND(Unit, load_queue, u->manager->load_queue, u); |
288 | u->in_load_queue = true; | |
87f0e418 LP |
289 | } |
290 | ||
23a177ef LP |
291 | void unit_add_to_cleanup_queue(Unit *u) { |
292 | assert(u); | |
293 | ||
ac155bb8 | 294 | if (u->in_cleanup_queue) |
23a177ef LP |
295 | return; |
296 | ||
ac155bb8 MS |
297 | LIST_PREPEND(Unit, cleanup_queue, u->manager->cleanup_queue, u); |
298 | u->in_cleanup_queue = true; | |
23a177ef LP |
299 | } |
300 | ||
701cc384 LP |
301 | void unit_add_to_gc_queue(Unit *u) { |
302 | assert(u); | |
303 | ||
ac155bb8 | 304 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
305 | return; |
306 | ||
307 | if (unit_check_gc(u)) | |
308 | return; | |
309 | ||
ac155bb8 MS |
310 | LIST_PREPEND(Unit, gc_queue, u->manager->gc_queue, u); |
311 | u->in_gc_queue = true; | |
701cc384 | 312 | |
ac155bb8 | 313 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
314 | } |
315 | ||
c1e1601e LP |
316 | void unit_add_to_dbus_queue(Unit *u) { |
317 | assert(u); | |
ac155bb8 | 318 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 319 | |
ac155bb8 | 320 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
321 | return; |
322 | ||
a567261a | 323 | /* Shortcut things if nobody cares */ |
ac155bb8 MS |
324 | if (!bus_has_subscriber(u->manager)) { |
325 | u->sent_dbus_new_signal = true; | |
94b6dfa2 LP |
326 | return; |
327 | } | |
328 | ||
ac155bb8 MS |
329 | LIST_PREPEND(Unit, dbus_queue, u->manager->dbus_unit_queue, u); |
330 | u->in_dbus_queue = true; | |
c1e1601e LP |
331 | } |
332 | ||
87f0e418 LP |
333 | static void bidi_set_free(Unit *u, Set *s) { |
334 | Iterator i; | |
335 | Unit *other; | |
336 | ||
337 | assert(u); | |
338 | ||
339 | /* Frees the set and makes sure we are dropped from the | |
340 | * inverse pointers */ | |
341 | ||
342 | SET_FOREACH(other, s, i) { | |
343 | UnitDependency d; | |
344 | ||
345 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 346 | set_remove(other->dependencies[d], u); |
701cc384 LP |
347 | |
348 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
349 | } |
350 | ||
351 | set_free(s); | |
352 | } | |
353 | ||
c2756a68 LP |
354 | static void unit_remove_transient(Unit *u) { |
355 | char **i; | |
356 | ||
357 | assert(u); | |
358 | ||
359 | if (!u->transient) | |
360 | return; | |
361 | ||
362 | if (u->fragment_path) | |
363 | unlink(u->fragment_path); | |
364 | ||
365 | STRV_FOREACH(i, u->dropin_paths) { | |
366 | _cleanup_free_ char *p = NULL; | |
367 | int r; | |
368 | ||
369 | unlink(*i); | |
370 | ||
371 | r = path_get_parent(*i, &p); | |
372 | if (r >= 0) | |
373 | rmdir(p); | |
374 | } | |
375 | } | |
376 | ||
87f0e418 LP |
377 | void unit_free(Unit *u) { |
378 | UnitDependency d; | |
379 | Iterator i; | |
380 | char *t; | |
381 | ||
382 | assert(u); | |
383 | ||
c2756a68 LP |
384 | if (u->manager->n_reloading <= 0) |
385 | unit_remove_transient(u); | |
386 | ||
c1e1601e LP |
387 | bus_unit_send_removed_signal(u); |
388 | ||
ac155bb8 | 389 | if (u->load_state != UNIT_STUB) |
a013b84b LP |
390 | if (UNIT_VTABLE(u)->done) |
391 | UNIT_VTABLE(u)->done(u); | |
392 | ||
ac155bb8 MS |
393 | SET_FOREACH(t, u->names, i) |
394 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 395 | |
97e7d748 MS |
396 | if (u->job) { |
397 | Job *j = u->job; | |
398 | job_uninstall(j); | |
399 | job_free(j); | |
400 | } | |
964e0949 | 401 | |
e0209d83 MS |
402 | if (u->nop_job) { |
403 | Job *j = u->nop_job; | |
404 | job_uninstall(j); | |
405 | job_free(j); | |
406 | } | |
407 | ||
964e0949 | 408 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 409 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 410 | |
7c8fa05c LP |
411 | if (u->requires_mounts_for) { |
412 | LIST_REMOVE(Unit, has_requires_mounts_for, u->manager->has_requires_mounts_for, u); | |
413 | strv_free(u->requires_mounts_for); | |
414 | } | |
415 | ||
ac155bb8 MS |
416 | if (u->type != _UNIT_TYPE_INVALID) |
417 | LIST_REMOVE(Unit, units_by_type, u->manager->units_by_type[u->type], u); | |
ef734fd6 | 418 | |
ac155bb8 MS |
419 | if (u->in_load_queue) |
420 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
87f0e418 | 421 | |
ac155bb8 MS |
422 | if (u->in_dbus_queue) |
423 | LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u); | |
c1e1601e | 424 | |
ac155bb8 MS |
425 | if (u->in_cleanup_queue) |
426 | LIST_REMOVE(Unit, cleanup_queue, u->manager->cleanup_queue, u); | |
23a177ef | 427 | |
ac155bb8 MS |
428 | if (u->in_gc_queue) { |
429 | LIST_REMOVE(Unit, gc_queue, u->manager->gc_queue, u); | |
430 | u->manager->n_in_gc_queue--; | |
701cc384 LP |
431 | } |
432 | ||
4ad49000 LP |
433 | if (u->in_cgroup_queue) |
434 | LIST_REMOVE(Unit, cgroup_queue, u->manager->cgroup_queue, u); | |
87f0e418 | 435 | |
72673e86 LP |
436 | if (u->cgroup_path) { |
437 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
438 | free(u->cgroup_path); | |
439 | } | |
440 | ||
ac155bb8 | 441 | free(u->description); |
49dbfa7b | 442 | strv_free(u->documentation); |
ac155bb8 | 443 | free(u->fragment_path); |
1b64d026 | 444 | free(u->source_path); |
ae7a7182 | 445 | strv_free(u->dropin_paths); |
ac155bb8 | 446 | free(u->instance); |
87f0e418 | 447 | |
ac155bb8 | 448 | set_free_free(u->names); |
87f0e418 | 449 | |
ac155bb8 | 450 | condition_free_list(u->conditions); |
52661efd | 451 | |
702a2d8f LP |
452 | unit_ref_unset(&u->slice); |
453 | ||
ac155bb8 MS |
454 | while (u->refs) |
455 | unit_ref_unset(u->refs); | |
57020a3a | 456 | |
87f0e418 LP |
457 | free(u); |
458 | } | |
459 | ||
460 | UnitActiveState unit_active_state(Unit *u) { | |
461 | assert(u); | |
462 | ||
ac155bb8 | 463 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
464 | return unit_active_state(unit_follow_merge(u)); |
465 | ||
466 | /* After a reload it might happen that a unit is not correctly | |
467 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 468 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
469 | |
470 | return UNIT_VTABLE(u)->active_state(u); | |
471 | } | |
472 | ||
10a94420 LP |
473 | const char* unit_sub_state_to_string(Unit *u) { |
474 | assert(u); | |
475 | ||
476 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
477 | } | |
478 | ||
23a177ef LP |
479 | static void complete_move(Set **s, Set **other) { |
480 | assert(s); | |
481 | assert(other); | |
87f0e418 | 482 | |
23a177ef LP |
483 | if (!*other) |
484 | return; | |
87f0e418 LP |
485 | |
486 | if (*s) | |
23a177ef LP |
487 | set_move(*s, *other); |
488 | else { | |
489 | *s = *other; | |
490 | *other = NULL; | |
491 | } | |
492 | } | |
87f0e418 | 493 | |
23a177ef LP |
494 | static void merge_names(Unit *u, Unit *other) { |
495 | char *t; | |
496 | Iterator i; | |
87f0e418 | 497 | |
23a177ef LP |
498 | assert(u); |
499 | assert(other); | |
500 | ||
ac155bb8 | 501 | complete_move(&u->names, &other->names); |
23a177ef | 502 | |
ac155bb8 MS |
503 | set_free_free(other->names); |
504 | other->names = NULL; | |
505 | other->id = NULL; | |
23a177ef | 506 | |
ac155bb8 MS |
507 | SET_FOREACH(t, u->names, i) |
508 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
87f0e418 LP |
509 | } |
510 | ||
23a177ef LP |
511 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
512 | Iterator i; | |
513 | Unit *back; | |
87f0e418 | 514 | int r; |
23a177ef LP |
515 | |
516 | assert(u); | |
517 | assert(other); | |
518 | assert(d < _UNIT_DEPENDENCY_MAX); | |
519 | ||
83a95334 | 520 | /* Fix backwards pointers */ |
ac155bb8 | 521 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
522 | UnitDependency k; |
523 | ||
524 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
ac155bb8 | 525 | if ((r = set_remove_and_put(back->dependencies[k], other, u)) < 0) { |
23a177ef LP |
526 | |
527 | if (r == -EEXIST) | |
ac155bb8 | 528 | set_remove(back->dependencies[k], other); |
23a177ef LP |
529 | else |
530 | assert(r == -ENOENT); | |
531 | } | |
532 | } | |
533 | ||
ac155bb8 | 534 | complete_move(&u->dependencies[d], &other->dependencies[d]); |
23a177ef | 535 | |
ac155bb8 MS |
536 | set_free(other->dependencies[d]); |
537 | other->dependencies[d] = NULL; | |
23a177ef LP |
538 | } |
539 | ||
540 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
541 | UnitDependency d; |
542 | ||
543 | assert(u); | |
544 | assert(other); | |
ac155bb8 MS |
545 | assert(u->manager == other->manager); |
546 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 547 | |
cc916967 LP |
548 | other = unit_follow_merge(other); |
549 | ||
23a177ef LP |
550 | if (other == u) |
551 | return 0; | |
552 | ||
ac155bb8 | 553 | if (u->type != other->type) |
9e2f7c11 LP |
554 | return -EINVAL; |
555 | ||
ac155bb8 | 556 | if (!u->instance != !other->instance) |
87f0e418 LP |
557 | return -EINVAL; |
558 | ||
ac155bb8 | 559 | if (other->load_state != UNIT_STUB && |
c2756a68 | 560 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 561 | return -EEXIST; |
87f0e418 | 562 | |
ac155bb8 | 563 | if (other->job) |
819e213f LP |
564 | return -EEXIST; |
565 | ||
e0209d83 MS |
566 | if (other->nop_job) |
567 | return -EEXIST; | |
568 | ||
fdf20a31 | 569 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
570 | return -EEXIST; |
571 | ||
87f0e418 | 572 | /* Merge names */ |
23a177ef | 573 | merge_names(u, other); |
87f0e418 | 574 | |
57020a3a | 575 | /* Redirect all references */ |
ac155bb8 MS |
576 | while (other->refs) |
577 | unit_ref_set(other->refs, u); | |
57020a3a | 578 | |
87f0e418 LP |
579 | /* Merge dependencies */ |
580 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 581 | merge_dependencies(u, other, d); |
87f0e418 | 582 | |
ac155bb8 MS |
583 | other->load_state = UNIT_MERGED; |
584 | other->merged_into = u; | |
23a177ef | 585 | |
3616a49c LP |
586 | /* If there is still some data attached to the other node, we |
587 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 588 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
589 | if (UNIT_VTABLE(other)->done) |
590 | UNIT_VTABLE(other)->done(other); | |
591 | ||
592 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
593 | unit_add_to_cleanup_queue(other); |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
598 | int unit_merge_by_name(Unit *u, const char *name) { | |
599 | Unit *other; | |
9e2f7c11 LP |
600 | int r; |
601 | char *s = NULL; | |
23a177ef LP |
602 | |
603 | assert(u); | |
604 | assert(name); | |
605 | ||
9e2f7c11 | 606 | if (unit_name_is_template(name)) { |
ac155bb8 | 607 | if (!u->instance) |
9e2f7c11 LP |
608 | return -EINVAL; |
609 | ||
ac155bb8 | 610 | if (!(s = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
611 | return -ENOMEM; |
612 | ||
613 | name = s; | |
614 | } | |
615 | ||
c2756a68 LP |
616 | other = manager_get_unit(u->manager, name); |
617 | if (!other) | |
9e2f7c11 LP |
618 | r = unit_add_name(u, name); |
619 | else | |
620 | r = unit_merge(u, other); | |
23a177ef | 621 | |
9e2f7c11 LP |
622 | free(s); |
623 | return r; | |
23a177ef LP |
624 | } |
625 | ||
626 | Unit* unit_follow_merge(Unit *u) { | |
627 | assert(u); | |
628 | ||
ac155bb8 MS |
629 | while (u->load_state == UNIT_MERGED) |
630 | assert_se(u = u->merged_into); | |
23a177ef LP |
631 | |
632 | return u; | |
633 | } | |
634 | ||
635 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
636 | int r; | |
637 | ||
638 | assert(u); | |
639 | assert(c); | |
640 | ||
ecc6e2b8 LP |
641 | if (c->std_output != EXEC_OUTPUT_KMSG && |
642 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 643 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
644 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
645 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 646 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 647 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 648 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 649 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 650 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 651 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 652 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
653 | return 0; |
654 | ||
655 | /* If syslog or kernel logging is requested, make sure our own | |
656 | * logging daemon is run first. */ | |
657 | ||
9d246da3 MS |
658 | if (u->manager->running_as == SYSTEMD_SYSTEM) { |
659 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); | |
660 | if (r < 0) | |
23a177ef | 661 | return r; |
9d246da3 | 662 | } |
23a177ef | 663 | |
87f0e418 LP |
664 | return 0; |
665 | } | |
666 | ||
87f0e418 LP |
667 | const char *unit_description(Unit *u) { |
668 | assert(u); | |
669 | ||
ac155bb8 MS |
670 | if (u->description) |
671 | return u->description; | |
87f0e418 | 672 | |
ac155bb8 | 673 | return strna(u->id); |
87f0e418 LP |
674 | } |
675 | ||
676 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 677 | char *t, **j; |
87f0e418 LP |
678 | UnitDependency d; |
679 | Iterator i; | |
47be870b LP |
680 | char *p2; |
681 | const char *prefix2; | |
173e3821 LP |
682 | char |
683 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
684 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
685 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
686 | timestamp4[FORMAT_TIMESTAMP_MAX], |
687 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 688 | Unit *following; |
87f0e418 LP |
689 | |
690 | assert(u); | |
ac155bb8 | 691 | assert(u->type >= 0); |
87f0e418 LP |
692 | |
693 | if (!prefix) | |
694 | prefix = ""; | |
47be870b LP |
695 | p2 = strappend(prefix, "\t"); |
696 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
697 | |
698 | fprintf(f, | |
40d50879 | 699 | "%s-> Unit %s:\n" |
87f0e418 | 700 | "%s\tDescription: %s\n" |
9e2f7c11 | 701 | "%s\tInstance: %s\n" |
87f0e418 | 702 | "%s\tUnit Load State: %s\n" |
2fad8195 | 703 | "%s\tUnit Active State: %s\n" |
173e3821 | 704 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 705 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 706 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 707 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 708 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 709 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 710 | "%s\tTransient: %s\n" |
4ad49000 LP |
711 | "%s\tSlice: %s\n" |
712 | "%s\tCGroup: %s\n" | |
713 | "%s\tCGroup realized: %s\n" | |
714 | "%s\tCGroup mask: 0x%x\n", | |
ac155bb8 | 715 | prefix, u->id, |
87f0e418 | 716 | prefix, unit_description(u), |
ac155bb8 MS |
717 | prefix, strna(u->instance), |
718 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 719 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
720 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
721 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
722 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
723 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 724 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 725 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 726 | prefix, yes_no(u->transient), |
4ad49000 LP |
727 | prefix, strna(unit_slice_name(u)), |
728 | prefix, strna(u->cgroup_path), | |
729 | prefix, yes_no(u->cgroup_realized), | |
730 | prefix, u->cgroup_mask); | |
0301abf4 | 731 | |
ac155bb8 | 732 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
733 | fprintf(f, "%s\tName: %s\n", prefix, t); |
734 | ||
49dbfa7b LP |
735 | STRV_FOREACH(j, u->documentation) |
736 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
737 | ||
a7f241db | 738 | if ((following = unit_following(u))) |
ac155bb8 | 739 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 740 | |
ac155bb8 MS |
741 | if (u->fragment_path) |
742 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 743 | |
1b64d026 LP |
744 | if (u->source_path) |
745 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
746 | ||
ae7a7182 | 747 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 748 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 749 | |
ac155bb8 | 750 | if (u->job_timeout > 0) |
2fa4092c | 751 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 752 | |
ac155bb8 | 753 | condition_dump_list(u->conditions, f, prefix); |
52661efd | 754 | |
ac155bb8 | 755 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
756 | fprintf(f, |
757 | "%s\tCondition Timestamp: %s\n" | |
758 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
759 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
760 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 761 | |
87f0e418 LP |
762 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
763 | Unit *other; | |
764 | ||
ac155bb8 MS |
765 | SET_FOREACH(other, u->dependencies[d], i) |
766 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
767 | } |
768 | ||
7c8fa05c | 769 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
770 | fprintf(f, |
771 | "%s\tRequiresMountsFor:", prefix); | |
772 | ||
773 | STRV_FOREACH(j, u->requires_mounts_for) | |
774 | fprintf(f, " %s", *j); | |
775 | ||
776 | fputs("\n", f); | |
777 | } | |
778 | ||
ac155bb8 | 779 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 780 | |
b0650475 | 781 | fprintf(f, |
a40eb732 | 782 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
783 | "%s\tRefuseManualStart: %s\n" |
784 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 785 | "%s\tDefaultDependencies: %s\n" |
c8f4d764 | 786 | "%s\tOnFailureIsolate: %s\n" |
7a6000a6 LP |
787 | "%s\tIgnoreOnIsolate: %s\n" |
788 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
789 | prefix, yes_no(u->stop_when_unneeded), |
790 | prefix, yes_no(u->refuse_manual_start), | |
791 | prefix, yes_no(u->refuse_manual_stop), | |
792 | prefix, yes_no(u->default_dependencies), | |
793 | prefix, yes_no(u->on_failure_isolate), | |
794 | prefix, yes_no(u->ignore_on_isolate), | |
795 | prefix, yes_no(u->ignore_on_snapshot)); | |
796 | ||
23a177ef LP |
797 | if (UNIT_VTABLE(u)->dump) |
798 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 799 | |
ac155bb8 | 800 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
801 | fprintf(f, |
802 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
803 | prefix, u->merged_into->id); |
804 | else if (u->load_state == UNIT_ERROR) | |
805 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 806 | |
87f0e418 | 807 | |
ac155bb8 MS |
808 | if (u->job) |
809 | job_dump(u->job, f, prefix2); | |
87f0e418 | 810 | |
e0209d83 MS |
811 | if (u->nop_job) |
812 | job_dump(u->nop_job, f, prefix2); | |
813 | ||
47be870b | 814 | free(p2); |
87f0e418 LP |
815 | } |
816 | ||
817 | /* Common implementation for multiple backends */ | |
e537352b | 818 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
819 | int r; |
820 | ||
821 | assert(u); | |
23a177ef LP |
822 | |
823 | /* Load a .service file */ | |
4ad49000 LP |
824 | r = unit_load_fragment(u); |
825 | if (r < 0) | |
23a177ef LP |
826 | return r; |
827 | ||
ac155bb8 | 828 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
829 | return -ENOENT; |
830 | ||
831 | /* Load drop-in directory data */ | |
4ad49000 LP |
832 | r = unit_load_dropin(unit_follow_merge(u)); |
833 | if (r < 0) | |
23a177ef LP |
834 | return r; |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
839 | /* Common implementation for multiple backends */ | |
e537352b | 840 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 841 | int r; |
87f0e418 LP |
842 | |
843 | assert(u); | |
844 | ||
23a177ef LP |
845 | /* Same as unit_load_fragment_and_dropin(), but whether |
846 | * something can be loaded or not doesn't matter. */ | |
847 | ||
848 | /* Load a .service file */ | |
4ad49000 LP |
849 | r = unit_load_fragment(u); |
850 | if (r < 0) | |
87f0e418 LP |
851 | return r; |
852 | ||
ac155bb8 MS |
853 | if (u->load_state == UNIT_STUB) |
854 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 855 | |
87f0e418 | 856 | /* Load drop-in directory data */ |
4ad49000 LP |
857 | r = unit_load_dropin(unit_follow_merge(u)); |
858 | if (r < 0) | |
87f0e418 LP |
859 | return r; |
860 | ||
23a177ef | 861 | return 0; |
87f0e418 LP |
862 | } |
863 | ||
bba34eed | 864 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
865 | assert(u); |
866 | assert(target); | |
867 | ||
ac155bb8 | 868 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
869 | return 0; |
870 | ||
35b8ca3a | 871 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 872 | * that loop check below is reliable */ |
ac155bb8 MS |
873 | if (u->load_state != UNIT_LOADED || |
874 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
875 | return 0; |
876 | ||
21256a2b LP |
877 | /* If either side wants no automatic dependencies, then let's |
878 | * skip this */ | |
ac155bb8 MS |
879 | if (!u->default_dependencies || |
880 | !target->default_dependencies) | |
21256a2b LP |
881 | return 0; |
882 | ||
98bc2000 | 883 | /* Don't create loops */ |
ac155bb8 | 884 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
885 | return 0; |
886 | ||
887 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
888 | } | |
889 | ||
890 | static int unit_add_default_dependencies(Unit *u) { | |
a016b922 | 891 | |
21256a2b LP |
892 | static const UnitDependency deps[] = { |
893 | UNIT_REQUIRED_BY, | |
894 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
895 | UNIT_WANTED_BY, | |
896 | UNIT_BOUND_BY | |
897 | }; | |
898 | ||
bba34eed | 899 | Unit *target; |
98bc2000 LP |
900 | Iterator i; |
901 | int r; | |
21256a2b | 902 | unsigned k; |
98bc2000 LP |
903 | |
904 | assert(u); | |
905 | ||
21256a2b | 906 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
907 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
908 | r = unit_add_default_target_dependency(u, target); | |
909 | if (r < 0) | |
21256a2b | 910 | return r; |
a016b922 LP |
911 | } |
912 | ||
4ad49000 LP |
913 | if (u->default_dependencies && unit_get_cgroup_context(u)) { |
914 | if (UNIT_ISSET(u->slice)) | |
915 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
916 | else | |
917 | r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); | |
918 | ||
a016b922 LP |
919 | if (r < 0) |
920 | return r; | |
921 | } | |
b81884e7 | 922 | |
98bc2000 LP |
923 | return 0; |
924 | } | |
925 | ||
87f0e418 LP |
926 | int unit_load(Unit *u) { |
927 | int r; | |
928 | ||
929 | assert(u); | |
930 | ||
ac155bb8 MS |
931 | if (u->in_load_queue) { |
932 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
933 | u->in_load_queue = false; | |
87f0e418 LP |
934 | } |
935 | ||
ac155bb8 | 936 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
937 | return -EINVAL; |
938 | ||
ac155bb8 | 939 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
940 | return 0; |
941 | ||
c2756a68 LP |
942 | if (UNIT_VTABLE(u)->load) { |
943 | r = UNIT_VTABLE(u)->load(u); | |
944 | if (r < 0) | |
87f0e418 | 945 | goto fail; |
c2756a68 | 946 | } |
23a177ef | 947 | |
ac155bb8 | 948 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
949 | r = -ENOENT; |
950 | goto fail; | |
951 | } | |
952 | ||
7c8fa05c | 953 | if (u->load_state == UNIT_LOADED) { |
c2756a68 LP |
954 | |
955 | if (u->default_dependencies) { | |
956 | r = unit_add_default_dependencies(u); | |
957 | if (r < 0) | |
958 | goto fail; | |
959 | } | |
960 | ||
7c8fa05c LP |
961 | r = unit_add_mount_links(u); |
962 | if (r < 0) | |
c2756a68 | 963 | goto fail; |
7c8fa05c | 964 | |
c2756a68 LP |
965 | if (u->on_failure_isolate && |
966 | set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { | |
f68319bb | 967 | |
c2756a68 LP |
968 | log_error_unit(u->id, |
969 | "More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", u->id); | |
f68319bb | 970 | |
c2756a68 LP |
971 | r = -EINVAL; |
972 | goto fail; | |
973 | } | |
f68319bb LP |
974 | } |
975 | ||
ac155bb8 | 976 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
977 | |
978 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 979 | unit_add_to_gc_queue(u); |
87f0e418 | 980 | |
87f0e418 LP |
981 | return 0; |
982 | ||
983 | fail: | |
c2756a68 | 984 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 985 | u->load_error = r; |
c1e1601e | 986 | unit_add_to_dbus_queue(u); |
9a46fc3b | 987 | unit_add_to_gc_queue(u); |
23a177ef | 988 | |
c1b6628d ZJS |
989 | log_debug_unit(u->id, "Failed to load configuration for %s: %s", |
990 | u->id, strerror(-r)); | |
23a177ef | 991 | |
87f0e418 LP |
992 | return r; |
993 | } | |
994 | ||
90bbc946 LP |
995 | bool unit_condition_test(Unit *u) { |
996 | assert(u); | |
997 | ||
ac155bb8 MS |
998 | dual_timestamp_get(&u->condition_timestamp); |
999 | u->condition_result = condition_test_list(u->conditions); | |
90bbc946 | 1000 | |
ac155bb8 | 1001 | return u->condition_result; |
90bbc946 LP |
1002 | } |
1003 | ||
44a6b1b6 | 1004 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 1005 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1006 | |
1007 | assert(u); | |
1008 | assert(t >= 0); | |
1009 | assert(t < _JOB_TYPE_MAX); | |
1010 | ||
1011 | if (t != JOB_START && t != JOB_STOP) | |
1012 | return NULL; | |
c6918296 MS |
1013 | |
1014 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1015 | if (!format_table) | |
877d54e9 LP |
1016 | return NULL; |
1017 | ||
1018 | return format_table->starting_stopping[t == JOB_STOP]; | |
1019 | } | |
1020 | ||
44a6b1b6 | 1021 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { |
877d54e9 LP |
1022 | const char *format; |
1023 | ||
1024 | assert(u); | |
1025 | assert(t >= 0); | |
1026 | assert(t < _JOB_TYPE_MAX); | |
1027 | ||
1028 | format = unit_get_status_message_format(u, t); | |
1029 | if (format) | |
1030 | return format; | |
1031 | ||
1032 | /* Return generic strings */ | |
1033 | if (t == JOB_START) | |
1034 | return "Starting %s."; | |
1035 | else if (t == JOB_STOP) | |
1036 | return "Stopping %s."; | |
1037 | else if (t == JOB_RELOAD) | |
1038 | return "Reloading %s."; | |
1039 | ||
1040 | return NULL; | |
1041 | } | |
1042 | ||
1043 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1044 | const char *format; | |
1045 | ||
1046 | assert(u); | |
1047 | ||
1048 | /* We only print status messages for selected units on | |
1049 | * selected operations. */ | |
c6918296 | 1050 | |
877d54e9 | 1051 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
1052 | if (!format) |
1053 | return; | |
1054 | ||
49b1d377 | 1055 | unit_status_printf(u, "", format); |
c6918296 MS |
1056 | } |
1057 | ||
877d54e9 LP |
1058 | #pragma GCC diagnostic push |
1059 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
1060 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { | |
1061 | const char *format; | |
1062 | char buf[LINE_MAX]; | |
1063 | sd_id128_t mid; | |
1064 | ||
1065 | assert(u); | |
1066 | ||
1067 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1068 | return; | |
1069 | ||
81270860 LP |
1070 | if (log_on_console()) |
1071 | return; | |
1072 | ||
877d54e9 LP |
1073 | /* We log status messages for all units and all operations. */ |
1074 | ||
1075 | format = unit_get_status_message_format_try_harder(u, t); | |
1076 | if (!format) | |
1077 | return; | |
1078 | ||
1079 | snprintf(buf, sizeof(buf), format, unit_description(u)); | |
1080 | char_array_0(buf); | |
1081 | ||
1082 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1083 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1084 | SD_MESSAGE_UNIT_RELOADING; | |
1085 | ||
bbc9006e | 1086 | log_struct_unit(LOG_INFO, |
c1b6628d ZJS |
1087 | u->id, |
1088 | MESSAGE_ID(mid), | |
1089 | "MESSAGE=%s", buf, | |
1090 | NULL); | |
877d54e9 LP |
1091 | } |
1092 | #pragma GCC diagnostic pop | |
1093 | ||
87f0e418 | 1094 | /* Errors: |
d5159713 LP |
1095 | * -EBADR: This unit type does not support starting. |
1096 | * -EALREADY: Unit is already started. | |
1097 | * -EAGAIN: An operation is already in progress. Retry later. | |
1098 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
1099 | */ |
1100 | int unit_start(Unit *u) { | |
1101 | UnitActiveState state; | |
92ab323c | 1102 | Unit *following; |
87f0e418 LP |
1103 | |
1104 | assert(u); | |
1105 | ||
ac155bb8 | 1106 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1107 | return -EINVAL; |
1108 | ||
a82e5507 LP |
1109 | /* If this is already started, then this will succeed. Note |
1110 | * that this will even succeed if this unit is not startable | |
1111 | * by the user. This is relied on to detect when we need to | |
1112 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1113 | state = unit_active_state(u); |
1114 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1115 | return -EALREADY; | |
1116 | ||
a82e5507 LP |
1117 | /* If the conditions failed, don't do anything at all. If we |
1118 | * already are activating this call might still be useful to | |
1119 | * speed up activation in case there is some hold-off time, | |
1120 | * but we don't want to recheck the condition in that case. */ | |
1121 | if (state != UNIT_ACTIVATING && | |
1122 | !unit_condition_test(u)) { | |
c1b6628d | 1123 | log_debug_unit(u->id, "Starting of %s requested but condition failed. Ignoring.", u->id); |
52661efd LP |
1124 | return -EALREADY; |
1125 | } | |
1126 | ||
92ab323c LP |
1127 | /* Forward to the main object, if we aren't it. */ |
1128 | if ((following = unit_following(u))) { | |
c1b6628d ZJS |
1129 | log_debug_unit(u->id, "Redirecting start request from %s to %s.", |
1130 | u->id, following->id); | |
92ab323c LP |
1131 | return unit_start(following); |
1132 | } | |
1133 | ||
877d54e9 LP |
1134 | unit_status_log_starting_stopping_reloading(u, JOB_START); |
1135 | unit_status_print_starting_stopping(u, JOB_START); | |
c6918296 | 1136 | |
92ab323c LP |
1137 | /* If it is stopped, but we cannot start it, then fail */ |
1138 | if (!UNIT_VTABLE(u)->start) | |
1139 | return -EBADR; | |
1140 | ||
87f0e418 LP |
1141 | /* We don't suppress calls to ->start() here when we are |
1142 | * already starting, to allow this request to be used as a | |
1143 | * "hurry up" call, for example when the unit is in some "auto | |
1144 | * restart" state where it waits for a holdoff timer to elapse | |
1145 | * before it will start again. */ | |
1146 | ||
c1e1601e | 1147 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1148 | |
87f0e418 LP |
1149 | return UNIT_VTABLE(u)->start(u); |
1150 | } | |
1151 | ||
1152 | bool unit_can_start(Unit *u) { | |
1153 | assert(u); | |
1154 | ||
1155 | return !!UNIT_VTABLE(u)->start; | |
1156 | } | |
1157 | ||
2528a7a6 LP |
1158 | bool unit_can_isolate(Unit *u) { |
1159 | assert(u); | |
1160 | ||
1161 | return unit_can_start(u) && | |
ac155bb8 | 1162 | u->allow_isolate; |
2528a7a6 LP |
1163 | } |
1164 | ||
87f0e418 LP |
1165 | /* Errors: |
1166 | * -EBADR: This unit type does not support stopping. | |
1167 | * -EALREADY: Unit is already stopped. | |
1168 | * -EAGAIN: An operation is already in progress. Retry later. | |
1169 | */ | |
1170 | int unit_stop(Unit *u) { | |
1171 | UnitActiveState state; | |
92ab323c | 1172 | Unit *following; |
87f0e418 LP |
1173 | |
1174 | assert(u); | |
1175 | ||
87f0e418 | 1176 | state = unit_active_state(u); |
fdf20a31 | 1177 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1178 | return -EALREADY; |
1179 | ||
92ab323c | 1180 | if ((following = unit_following(u))) { |
c1b6628d ZJS |
1181 | log_debug_unit(u->id, "Redirecting stop request from %s to %s.", |
1182 | u->id, following->id); | |
92ab323c LP |
1183 | return unit_stop(following); |
1184 | } | |
1185 | ||
877d54e9 LP |
1186 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); |
1187 | unit_status_print_starting_stopping(u, JOB_STOP); | |
c6918296 | 1188 | |
7898b0cf LP |
1189 | if (!UNIT_VTABLE(u)->stop) |
1190 | return -EBADR; | |
1191 | ||
c1e1601e | 1192 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1193 | |
87f0e418 LP |
1194 | return UNIT_VTABLE(u)->stop(u); |
1195 | } | |
1196 | ||
1197 | /* Errors: | |
1198 | * -EBADR: This unit type does not support reloading. | |
1199 | * -ENOEXEC: Unit is not started. | |
1200 | * -EAGAIN: An operation is already in progress. Retry later. | |
1201 | */ | |
1202 | int unit_reload(Unit *u) { | |
1203 | UnitActiveState state; | |
92ab323c | 1204 | Unit *following; |
87f0e418 LP |
1205 | |
1206 | assert(u); | |
1207 | ||
ac155bb8 | 1208 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1209 | return -EINVAL; |
1210 | ||
87f0e418 LP |
1211 | if (!unit_can_reload(u)) |
1212 | return -EBADR; | |
1213 | ||
1214 | state = unit_active_state(u); | |
e364ad06 | 1215 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1216 | return -EALREADY; |
1217 | ||
e364ad06 | 1218 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
1219 | return -ENOEXEC; |
1220 | ||
92ab323c | 1221 | if ((following = unit_following(u))) { |
c1b6628d ZJS |
1222 | log_debug_unit(u->id, "Redirecting reload request from %s to %s.", |
1223 | u->id, following->id); | |
92ab323c LP |
1224 | return unit_reload(following); |
1225 | } | |
1226 | ||
877d54e9 LP |
1227 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); |
1228 | ||
c1e1601e | 1229 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1230 | return UNIT_VTABLE(u)->reload(u); |
1231 | } | |
1232 | ||
1233 | bool unit_can_reload(Unit *u) { | |
1234 | assert(u); | |
1235 | ||
1236 | if (!UNIT_VTABLE(u)->reload) | |
1237 | return false; | |
1238 | ||
1239 | if (!UNIT_VTABLE(u)->can_reload) | |
1240 | return true; | |
1241 | ||
1242 | return UNIT_VTABLE(u)->can_reload(u); | |
1243 | } | |
1244 | ||
b4a16b7b | 1245 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1246 | Iterator i; |
1247 | Unit *other; | |
1248 | ||
1249 | assert(u); | |
1250 | ||
1251 | /* If this service shall be shut down when unneeded then do | |
1252 | * so. */ | |
1253 | ||
ac155bb8 | 1254 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1255 | return; |
1256 | ||
1257 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1258 | return; | |
1259 | ||
ac155bb8 | 1260 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
31afa0a4 | 1261 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1262 | return; |
1263 | ||
ac155bb8 | 1264 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
31afa0a4 | 1265 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1266 | return; |
1267 | ||
ac155bb8 | 1268 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
31afa0a4 | 1269 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1270 | return; |
1271 | ||
ac155bb8 | 1272 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
31afa0a4 | 1273 | if (unit_active_or_pending(other)) |
b81884e7 LP |
1274 | return; |
1275 | ||
c1b6628d | 1276 | log_info_unit(u->id, "Service %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1277 | |
1278 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1279 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1280 | } |
1281 | ||
87f0e418 LP |
1282 | static void retroactively_start_dependencies(Unit *u) { |
1283 | Iterator i; | |
1284 | Unit *other; | |
1285 | ||
1286 | assert(u); | |
1287 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1288 | ||
ac155bb8 MS |
1289 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1290 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1291 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1292 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1293 | |
7f2cddae | 1294 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1295 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1296 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1297 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1298 | |
ac155bb8 MS |
1299 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1300 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1301 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1302 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1303 | |
ac155bb8 MS |
1304 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1305 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1306 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1307 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1308 | |
ac155bb8 | 1309 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1310 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1311 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1312 | |
ac155bb8 | 1313 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1314 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1315 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1316 | } |
1317 | ||
1318 | static void retroactively_stop_dependencies(Unit *u) { | |
1319 | Iterator i; | |
1320 | Unit *other; | |
1321 | ||
1322 | assert(u); | |
1323 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1324 | ||
b81884e7 | 1325 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1326 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1327 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1328 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1329 | } |
1330 | ||
1331 | static void check_unneeded_dependencies(Unit *u) { | |
1332 | Iterator i; | |
1333 | Unit *other; | |
1334 | ||
1335 | assert(u); | |
1336 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1337 | |
1338 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1339 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1340 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1341 | unit_check_unneeded(other); |
ac155bb8 | 1342 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1343 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1344 | unit_check_unneeded(other); |
ac155bb8 | 1345 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1346 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1347 | unit_check_unneeded(other); |
ac155bb8 | 1348 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1349 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1350 | unit_check_unneeded(other); |
ac155bb8 | 1351 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1352 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1353 | unit_check_unneeded(other); |
7f2cddae | 1354 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1355 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1356 | unit_check_unneeded(other); | |
87f0e418 LP |
1357 | } |
1358 | ||
3ecaa09b | 1359 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1360 | Unit *other; |
1361 | Iterator i; | |
1362 | ||
1363 | assert(u); | |
1364 | ||
ac155bb8 | 1365 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1366 | return; |
1367 | ||
c1b6628d | 1368 | log_info_unit(u->id, "Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1369 | |
ac155bb8 | 1370 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1371 | int r; |
1372 | ||
c1b6628d ZJS |
1373 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL); |
1374 | if (r < 0) | |
1375 | log_error_unit(u->id, "Failed to enqueue OnFailure= job: %s", strerror(-r)); | |
222ae6a8 | 1376 | } |
c0daa706 LP |
1377 | } |
1378 | ||
3ecaa09b LP |
1379 | void unit_trigger_notify(Unit *u) { |
1380 | Unit *other; | |
1381 | Iterator i; | |
1382 | ||
1383 | assert(u); | |
1384 | ||
1385 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1386 | if (UNIT_VTABLE(other)->trigger_notify) | |
1387 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1388 | } | |
1389 | ||
e2f3b44c | 1390 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1391 | Manager *m; |
7e6e7b06 | 1392 | bool unexpected; |
a096ed36 | 1393 | |
87f0e418 LP |
1394 | assert(u); |
1395 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1396 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1397 | |
8e471ccd LP |
1398 | /* Note that this is called for all low-level state changes, |
1399 | * even if they might map to the same high-level | |
1400 | * UnitActiveState! That means that ns == os is OK an expected | |
c5315881 | 1401 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1402 | * this function will be called too! */ |
87f0e418 | 1403 | |
546ac4f0 MS |
1404 | m = u->manager; |
1405 | ||
1406 | if (m->n_reloading <= 0) { | |
bdbf9951 | 1407 | dual_timestamp ts; |
173e3821 | 1408 | |
bdbf9951 | 1409 | dual_timestamp_get(&ts); |
173e3821 | 1410 | |
bdbf9951 | 1411 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1412 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1413 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1414 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1415 | |
1416 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1417 | u->active_enter_timestamp = ts; |
bdbf9951 | 1418 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1419 | u->active_exit_timestamp = ts; |
bdbf9951 | 1420 | } |
87f0e418 | 1421 | |
fdf20a31 | 1422 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
4ad49000 | 1423 | unit_destroy_cgroup(u); |
fb385181 | 1424 | |
7ed9f6cd MS |
1425 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1426 | ExecContext *ec = unit_get_exec_context(u); | |
1427 | if (ec && exec_context_may_touch_console(ec)) { | |
7ed9f6cd MS |
1428 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
1429 | m->n_on_console--; | |
1430 | else | |
1431 | m->n_on_console++; | |
1432 | } | |
1433 | } | |
1434 | ||
ac155bb8 | 1435 | if (u->job) { |
7e6e7b06 | 1436 | unexpected = false; |
87f0e418 | 1437 | |
ac155bb8 | 1438 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1439 | |
1440 | /* So we reached a different state for this | |
1441 | * job. Let's see if we can run it now if it | |
1442 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1443 | job_add_to_run_queue(u->job); |
87f0e418 | 1444 | |
b410e6b9 | 1445 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1446 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1447 | * hence needs to invalidate jobs. */ |
87f0e418 | 1448 | |
ac155bb8 | 1449 | switch (u->job->type) { |
87f0e418 | 1450 | |
b410e6b9 LP |
1451 | case JOB_START: |
1452 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1453 | |
b410e6b9 | 1454 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1455 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1456 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1457 | unexpected = true; |
41b02ec7 | 1458 | |
fdf20a31 | 1459 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1460 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1461 | } |
87f0e418 | 1462 | |
b410e6b9 | 1463 | break; |
87f0e418 | 1464 | |
b410e6b9 LP |
1465 | case JOB_RELOAD: |
1466 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1467 | |
ac155bb8 | 1468 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1469 | if (ns == UNIT_ACTIVE) |
5273510e | 1470 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1471 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1472 | unexpected = true; |
41b02ec7 | 1473 | |
fdf20a31 | 1474 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1475 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1476 | } |
b410e6b9 | 1477 | } |
87f0e418 | 1478 | |
b410e6b9 | 1479 | break; |
87f0e418 | 1480 | |
b410e6b9 LP |
1481 | case JOB_STOP: |
1482 | case JOB_RESTART: | |
1483 | case JOB_TRY_RESTART: | |
87f0e418 | 1484 | |
fdf20a31 | 1485 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1486 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1487 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1488 | unexpected = true; |
5273510e | 1489 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1490 | } |
87f0e418 | 1491 | |
b410e6b9 | 1492 | break; |
87f0e418 | 1493 | |
b410e6b9 LP |
1494 | default: |
1495 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1496 | } |
87f0e418 | 1497 | |
7e6e7b06 LP |
1498 | } else |
1499 | unexpected = true; | |
1500 | ||
546ac4f0 | 1501 | if (m->n_reloading <= 0) { |
f3bff0eb | 1502 | |
bdbf9951 LP |
1503 | /* If this state change happened without being |
1504 | * requested by a job, then let's retroactively start | |
1505 | * or stop dependencies. We skip that step when | |
1506 | * deserializing, since we don't want to create any | |
1507 | * additional jobs just because something is already | |
1508 | * activated. */ | |
1509 | ||
1510 | if (unexpected) { | |
1511 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1512 | retroactively_start_dependencies(u); | |
1513 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1514 | retroactively_stop_dependencies(u); | |
1515 | } | |
5de9682c | 1516 | |
cd0504d0 MS |
1517 | /* stop unneeded units regardless if going down was expected or not */ |
1518 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1519 | check_unneeded_dependencies(u); | |
1520 | ||
bdbf9951 | 1521 | if (ns != os && ns == UNIT_FAILED) { |
c1b6628d | 1522 | log_notice_unit(u->id, |
fcf8c440 | 1523 | "Unit %s entered failed state.", u->id); |
3ecaa09b | 1524 | unit_start_on_failure(u); |
cd6d0a45 | 1525 | } |
3b2775c5 | 1526 | } |
e537352b | 1527 | |
3b2775c5 LP |
1528 | /* Some names are special */ |
1529 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1530 | ||
1531 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1532 | /* The bus just might have become available, | |
1533 | * hence try to connect to it, if we aren't | |
1534 | * yet connected. */ | |
546ac4f0 | 1535 | bus_init(m, true); |
3b2775c5 | 1536 | |
ac155bb8 | 1537 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1538 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1539 | m->n_reloading <= 0) { |
3b2775c5 | 1540 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1541 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1542 | u->in_audit = true; |
3b2775c5 | 1543 | } |
e983b760 | 1544 | |
3b2775c5 | 1545 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1546 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1547 | |
3b2775c5 | 1548 | } else { |
bdbf9951 | 1549 | |
3b2775c5 LP |
1550 | /* We don't care about D-Bus here, since we'll get an |
1551 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1552 | |
ac155bb8 | 1553 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1554 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1555 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1556 | m->n_reloading <= 0) { |
4927fcae | 1557 | |
3b2775c5 LP |
1558 | /* Hmm, if there was no start record written |
1559 | * write it now, so that we always have a nice | |
1560 | * pair */ | |
ac155bb8 | 1561 | if (!u->in_audit) { |
546ac4f0 | 1562 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1563 | |
3b2775c5 | 1564 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1565 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1566 | } else |
1567 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1568 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1569 | |
ac155bb8 | 1570 | u->in_audit = false; |
cd6d0a45 | 1571 | } |
f278026d LP |
1572 | } |
1573 | ||
546ac4f0 | 1574 | manager_recheck_journal(m); |
3ecaa09b | 1575 | unit_trigger_notify(u); |
3b2775c5 | 1576 | |
f3bff0eb LP |
1577 | /* Maybe we finished startup and are now ready for being |
1578 | * stopped because unneeded? */ | |
bf6dcfa6 OS |
1579 | if (u->manager->n_reloading <= 0) |
1580 | unit_check_unneeded(u); | |
c1e1601e LP |
1581 | |
1582 | unit_add_to_dbus_queue(u); | |
701cc384 | 1583 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1584 | } |
1585 | ||
acbb0225 | 1586 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
b92bea5d ZJS |
1587 | struct epoll_event ev = { |
1588 | .data.ptr = w, | |
1589 | .events = events, | |
1590 | }; | |
87f0e418 LP |
1591 | |
1592 | assert(u); | |
1593 | assert(fd >= 0); | |
acbb0225 | 1594 | assert(w); |
ea430986 | 1595 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 | 1596 | |
ac155bb8 | 1597 | if (epoll_ctl(u->manager->epoll_fd, |
acbb0225 LP |
1598 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, |
1599 | fd, | |
1600 | &ev) < 0) | |
1601 | return -errno; | |
87f0e418 | 1602 | |
acbb0225 LP |
1603 | w->fd = fd; |
1604 | w->type = WATCH_FD; | |
ea430986 | 1605 | w->data.unit = u; |
87f0e418 | 1606 | |
acbb0225 | 1607 | return 0; |
87f0e418 LP |
1608 | } |
1609 | ||
acbb0225 | 1610 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1611 | assert(u); |
acbb0225 | 1612 | assert(w); |
87f0e418 | 1613 | |
acbb0225 LP |
1614 | if (w->type == WATCH_INVALID) |
1615 | return; | |
1616 | ||
ea430986 LP |
1617 | assert(w->type == WATCH_FD); |
1618 | assert(w->data.unit == u); | |
ac155bb8 | 1619 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
acbb0225 LP |
1620 | |
1621 | w->fd = -1; | |
1622 | w->type = WATCH_INVALID; | |
ea430986 | 1623 | w->data.unit = NULL; |
87f0e418 LP |
1624 | } |
1625 | ||
1626 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1627 | assert(u); | |
1628 | assert(pid >= 1); | |
1629 | ||
05e343b7 LP |
1630 | /* Watch a specific PID. We only support one unit watching |
1631 | * each PID for now. */ | |
1632 | ||
ac155bb8 | 1633 | return hashmap_put(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1634 | } |
1635 | ||
1636 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1637 | assert(u); | |
1638 | assert(pid >= 1); | |
1639 | ||
ac155bb8 | 1640 | hashmap_remove_value(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1641 | } |
1642 | ||
36697dc0 | 1643 | int unit_watch_timer(Unit *u, clockid_t clock_id, bool relative, usec_t usec, Watch *w) { |
b92bea5d | 1644 | struct itimerspec its = {}; |
acbb0225 | 1645 | int flags, fd; |
87f0e418 LP |
1646 | bool ours; |
1647 | ||
1648 | assert(u); | |
acbb0225 | 1649 | assert(w); |
faf919f1 | 1650 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1651 | |
1652 | /* This will try to reuse the old timer if there is one */ | |
1653 | ||
faf919f1 LP |
1654 | if (w->type == WATCH_UNIT_TIMER) { |
1655 | assert(w->data.unit == u); | |
1656 | assert(w->fd >= 0); | |
1657 | ||
87f0e418 | 1658 | ours = false; |
acbb0225 | 1659 | fd = w->fd; |
faf919f1 LP |
1660 | } else if (w->type == WATCH_INVALID) { |
1661 | ||
87f0e418 | 1662 | ours = true; |
36697dc0 | 1663 | fd = timerfd_create(clock_id, TFD_NONBLOCK|TFD_CLOEXEC); |
68b29a9f | 1664 | if (fd < 0) |
87f0e418 | 1665 | return -errno; |
faf919f1 LP |
1666 | } else |
1667 | assert_not_reached("Invalid watch type"); | |
87f0e418 | 1668 | |
36697dc0 | 1669 | if (usec <= 0) { |
87f0e418 LP |
1670 | /* Set absolute time in the past, but not 0, since we |
1671 | * don't want to disarm the timer */ | |
1672 | its.it_value.tv_sec = 0; | |
1673 | its.it_value.tv_nsec = 1; | |
1674 | ||
1675 | flags = TFD_TIMER_ABSTIME; | |
1676 | } else { | |
36697dc0 LP |
1677 | timespec_store(&its.it_value, usec); |
1678 | flags = relative ? 0 : TFD_TIMER_ABSTIME; | |
87f0e418 LP |
1679 | } |
1680 | ||
1681 | /* This will also flush the elapse counter */ | |
1682 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1683 | goto fail; | |
1684 | ||
acbb0225 | 1685 | if (w->type == WATCH_INVALID) { |
b92bea5d ZJS |
1686 | struct epoll_event ev = { |
1687 | .data.ptr = w, | |
1688 | .events = EPOLLIN, | |
1689 | }; | |
acbb0225 | 1690 | |
ac155bb8 | 1691 | if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) |
acbb0225 LP |
1692 | goto fail; |
1693 | } | |
1694 | ||
faf919f1 | 1695 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1696 | w->fd = fd; |
ea430986 | 1697 | w->data.unit = u; |
87f0e418 | 1698 | |
87f0e418 LP |
1699 | return 0; |
1700 | ||
1701 | fail: | |
1702 | if (ours) | |
ea430986 | 1703 | close_nointr_nofail(fd); |
87f0e418 LP |
1704 | |
1705 | return -errno; | |
1706 | } | |
1707 | ||
acbb0225 | 1708 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1709 | assert(u); |
acbb0225 | 1710 | assert(w); |
87f0e418 | 1711 | |
acbb0225 | 1712 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1713 | return; |
1714 | ||
faf919f1 LP |
1715 | assert(w->type == WATCH_UNIT_TIMER); |
1716 | assert(w->data.unit == u); | |
1717 | assert(w->fd >= 0); | |
acbb0225 | 1718 | |
ac155bb8 | 1719 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
a16e1123 | 1720 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1721 | |
1722 | w->fd = -1; | |
1723 | w->type = WATCH_INVALID; | |
ea430986 | 1724 | w->data.unit = NULL; |
87f0e418 LP |
1725 | } |
1726 | ||
1727 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1728 | assert(u); | |
1729 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1730 | ||
1731 | switch (j) { | |
1732 | ||
1733 | case JOB_VERIFY_ACTIVE: | |
1734 | case JOB_START: | |
57339f47 | 1735 | case JOB_STOP: |
e0209d83 | 1736 | case JOB_NOP: |
87f0e418 LP |
1737 | return true; |
1738 | ||
87f0e418 LP |
1739 | case JOB_RESTART: |
1740 | case JOB_TRY_RESTART: | |
1741 | return unit_can_start(u); | |
1742 | ||
1743 | case JOB_RELOAD: | |
1744 | return unit_can_reload(u); | |
1745 | ||
1746 | case JOB_RELOAD_OR_START: | |
1747 | return unit_can_reload(u) && unit_can_start(u); | |
1748 | ||
1749 | default: | |
1750 | assert_not_reached("Invalid job type"); | |
1751 | } | |
1752 | } | |
1753 | ||
701cc384 | 1754 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1755 | |
1756 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1757 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1758 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1759 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1760 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1761 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 1762 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 1763 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 1764 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1765 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1766 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 1767 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 1768 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
1769 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1770 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1771 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1772 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1773 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 1774 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
1775 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
1776 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 1777 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 1778 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 1779 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
87f0e418 | 1780 | }; |
701cc384 | 1781 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1782 | |
1783 | assert(u); | |
1784 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1785 | assert(other); |
1786 | ||
9f151f29 LP |
1787 | u = unit_follow_merge(u); |
1788 | other = unit_follow_merge(other); | |
1789 | ||
87f0e418 LP |
1790 | /* We won't allow dependencies on ourselves. We will not |
1791 | * consider them an error however. */ | |
1792 | if (u == other) | |
1793 | return 0; | |
1794 | ||
ac155bb8 | 1795 | if ((r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1796 | return r; |
1797 | ||
5de9682c | 1798 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1799 | if ((r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) |
5de9682c LP |
1800 | return r; |
1801 | ||
701cc384 | 1802 | if (add_reference) |
ac155bb8 MS |
1803 | if ((r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || |
1804 | (r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
701cc384 | 1805 | return r; |
87f0e418 | 1806 | |
ac155bb8 | 1807 | if ((q = set_put(u->dependencies[d], other)) < 0) |
701cc384 | 1808 | return q; |
87f0e418 | 1809 | |
5de9682c | 1810 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1811 | if ((v = set_put(other->dependencies[inverse_table[d]], u)) < 0) { |
5de9682c LP |
1812 | r = v; |
1813 | goto fail; | |
1814 | } | |
701cc384 LP |
1815 | |
1816 | if (add_reference) { | |
ac155bb8 | 1817 | if ((w = set_put(u->dependencies[UNIT_REFERENCES], other)) < 0) { |
701cc384 LP |
1818 | r = w; |
1819 | goto fail; | |
1820 | } | |
1821 | ||
ac155bb8 | 1822 | if ((r = set_put(other->dependencies[UNIT_REFERENCED_BY], u)) < 0) |
701cc384 | 1823 | goto fail; |
87f0e418 LP |
1824 | } |
1825 | ||
c1e1601e | 1826 | unit_add_to_dbus_queue(u); |
87f0e418 | 1827 | return 0; |
701cc384 LP |
1828 | |
1829 | fail: | |
1830 | if (q > 0) | |
ac155bb8 | 1831 | set_remove(u->dependencies[d], other); |
701cc384 LP |
1832 | |
1833 | if (v > 0) | |
ac155bb8 | 1834 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
1835 | |
1836 | if (w > 0) | |
ac155bb8 | 1837 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
1838 | |
1839 | return r; | |
87f0e418 | 1840 | } |
0301abf4 | 1841 | |
2c966c03 LP |
1842 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1843 | int r; | |
1844 | ||
1845 | assert(u); | |
1846 | ||
1847 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1848 | return r; | |
1849 | ||
1850 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1851 | return r; | |
1852 | ||
1853 | return 0; | |
1854 | } | |
1855 | ||
9e2f7c11 LP |
1856 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1857 | char *s; | |
1858 | ||
1859 | assert(u); | |
1860 | assert(name || path); | |
8afbb8e1 | 1861 | assert(p); |
9e2f7c11 LP |
1862 | |
1863 | if (!name) | |
9eb977db | 1864 | name = path_get_file_name(path); |
9e2f7c11 LP |
1865 | |
1866 | if (!unit_name_is_template(name)) { | |
1867 | *p = NULL; | |
1868 | return name; | |
1869 | } | |
1870 | ||
ac155bb8 MS |
1871 | if (u->instance) |
1872 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 | 1873 | else { |
ae018d9b | 1874 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 1875 | |
8afbb8e1 LP |
1876 | i = unit_name_to_prefix(u->id); |
1877 | if (!i) | |
9e2f7c11 LP |
1878 | return NULL; |
1879 | ||
1880 | s = unit_name_replace_instance(name, i); | |
9e2f7c11 LP |
1881 | } |
1882 | ||
1883 | if (!s) | |
1884 | return NULL; | |
1885 | ||
1886 | *p = s; | |
1887 | return s; | |
1888 | } | |
1889 | ||
701cc384 | 1890 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1891 | Unit *other; |
1892 | int r; | |
8afbb8e1 | 1893 | _cleanup_free_ char *s = NULL; |
09b6b09f | 1894 | |
9e2f7c11 LP |
1895 | assert(u); |
1896 | assert(name || path); | |
09b6b09f | 1897 | |
8afbb8e1 LP |
1898 | name = resolve_template(u, name, path, &s); |
1899 | if (!name) | |
9e2f7c11 | 1900 | return -ENOMEM; |
09b6b09f | 1901 | |
8afbb8e1 LP |
1902 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
1903 | if (r < 0) | |
1904 | return r; | |
9e2f7c11 | 1905 | |
8afbb8e1 | 1906 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
1907 | } |
1908 | ||
2c966c03 LP |
1909 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1910 | Unit *other; | |
1911 | int r; | |
1912 | char *s; | |
1913 | ||
1914 | assert(u); | |
1915 | assert(name || path); | |
1916 | ||
1917 | if (!(name = resolve_template(u, name, path, &s))) | |
1918 | return -ENOMEM; | |
1919 | ||
ac155bb8 | 1920 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1921 | goto finish; |
1922 | ||
1923 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1924 | ||
1925 | finish: | |
1926 | free(s); | |
1927 | return r; | |
1928 | } | |
1929 | ||
701cc384 | 1930 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1931 | Unit *other; |
1932 | int r; | |
9e2f7c11 | 1933 | char *s; |
bd77d0fc | 1934 | |
9e2f7c11 LP |
1935 | assert(u); |
1936 | assert(name || path); | |
bd77d0fc | 1937 | |
9e2f7c11 LP |
1938 | if (!(name = resolve_template(u, name, path, &s))) |
1939 | return -ENOMEM; | |
bd77d0fc | 1940 | |
ac155bb8 | 1941 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1942 | goto finish; |
1943 | ||
701cc384 | 1944 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1945 | |
1946 | finish: | |
1947 | free(s); | |
1948 | return r; | |
bd77d0fc LP |
1949 | } |
1950 | ||
2c966c03 LP |
1951 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1952 | Unit *other; | |
1953 | int r; | |
1954 | char *s; | |
1955 | ||
1956 | assert(u); | |
1957 | assert(name || path); | |
1958 | ||
1959 | if (!(name = resolve_template(u, name, path, &s))) | |
1960 | return -ENOMEM; | |
1961 | ||
ac155bb8 | 1962 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1963 | goto finish; |
1964 | ||
1965 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1966 | goto finish; | |
1967 | ||
1968 | finish: | |
1969 | free(s); | |
1970 | return r; | |
1971 | } | |
1972 | ||
0301abf4 | 1973 | int set_unit_path(const char *p) { |
26d04f86 | 1974 | _cleanup_free_ char *c = NULL; |
0301abf4 LP |
1975 | |
1976 | /* This is mostly for debug purposes */ | |
26d04f86 LP |
1977 | c = path_make_absolute_cwd(p); |
1978 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) | |
1979 | return -errno; | |
0301abf4 LP |
1980 | |
1981 | return 0; | |
1982 | } | |
88066b3a | 1983 | |
ea430986 | 1984 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
1985 | assert(u); |
1986 | ||
ac155bb8 | 1987 | if (!u->id) |
04ade7d2 LP |
1988 | return NULL; |
1989 | ||
48899192 | 1990 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
1991 | } |
1992 | ||
41f9172f | 1993 | char *unit_default_cgroup_path(Unit *u) { |
a016b922 LP |
1994 | _cleanup_free_ char *escaped_instance = NULL, *slice = NULL; |
1995 | int r; | |
5954c074 | 1996 | |
013b87c0 LP |
1997 | assert(u); |
1998 | ||
4ad49000 LP |
1999 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2000 | return strdup(u->manager->cgroup_root); | |
2001 | ||
2002 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2003 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2004 | if (r < 0) | |
2005 | return NULL; | |
2006 | } | |
2007 | ||
5954c074 LP |
2008 | escaped_instance = cg_escape(u->id); |
2009 | if (!escaped_instance) | |
2010 | return NULL; | |
2011 | ||
ac155bb8 | 2012 | if (u->instance) { |
5954c074 | 2013 | _cleanup_free_ char *t = NULL, *escaped_template = NULL; |
013b87c0 | 2014 | |
ac155bb8 | 2015 | t = unit_name_template(u->id); |
cd0ed1db | 2016 | if (!t) |
4f2d528d LP |
2017 | return NULL; |
2018 | ||
ae018d9b LP |
2019 | escaped_template = cg_escape(t); |
2020 | if (!escaped_template) | |
2021 | return NULL; | |
2022 | ||
9444b1f2 | 2023 | return strjoin(u->manager->cgroup_root, "/", |
a016b922 LP |
2024 | slice ? slice : "", slice ? "/" : "", |
2025 | escaped_template, "/", escaped_instance, NULL); | |
5954c074 | 2026 | } else |
9444b1f2 | 2027 | return strjoin(u->manager->cgroup_root, "/", |
a016b922 LP |
2028 | slice ? slice : "", slice ? "/" : "", |
2029 | escaped_instance, NULL); | |
013b87c0 LP |
2030 | } |
2031 | ||
a016b922 LP |
2032 | int unit_add_default_slice(Unit *u) { |
2033 | Unit *slice; | |
2034 | int r; | |
2035 | ||
2036 | assert(u); | |
2037 | ||
9444b1f2 | 2038 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2039 | return 0; |
2040 | ||
4ad49000 | 2041 | if (!unit_get_cgroup_context(u)) |
a016b922 LP |
2042 | return 0; |
2043 | ||
4ad49000 | 2044 | r = manager_load_unit(u->manager, u->manager->running_as == SYSTEMD_SYSTEM ? SPECIAL_SYSTEM_SLICE : SPECIAL_ROOT_SLICE, NULL, NULL, &slice); |
a016b922 LP |
2045 | if (r < 0) |
2046 | return r; | |
2047 | ||
2048 | unit_ref_set(&u->slice, slice); | |
2049 | return 0; | |
2050 | } | |
2051 | ||
9444b1f2 LP |
2052 | const char *unit_slice_name(Unit *u) { |
2053 | assert(u); | |
2054 | ||
2055 | if (!UNIT_ISSET(u->slice)) | |
2056 | return NULL; | |
2057 | ||
2058 | return UNIT_DEREF(u->slice)->id; | |
2059 | } | |
2060 | ||
f6ff8c29 | 2061 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2062 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2063 | int r; |
2064 | ||
2065 | assert(u); | |
2066 | assert(type); | |
2067 | assert(_found); | |
2068 | ||
78edb35a LP |
2069 | t = unit_name_change_suffix(u->id, type); |
2070 | if (!t) | |
f6ff8c29 LP |
2071 | return -ENOMEM; |
2072 | ||
2073 | assert(!unit_has_name(u, t)); | |
2074 | ||
ac155bb8 | 2075 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2076 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2077 | return r; |
2078 | } | |
2079 | ||
a16e1123 | 2080 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2081 | _cleanup_free_ char *t = NULL; |
a16e1123 | 2082 | Unit *found; |
a16e1123 LP |
2083 | |
2084 | assert(u); | |
2085 | assert(type); | |
2086 | assert(_found); | |
2087 | ||
78edb35a LP |
2088 | t = unit_name_change_suffix(u->id, type); |
2089 | if (!t) | |
a16e1123 LP |
2090 | return -ENOMEM; |
2091 | ||
2092 | assert(!unit_has_name(u, t)); | |
2093 | ||
ac155bb8 | 2094 | found = manager_get_unit(u->manager, t); |
a16e1123 LP |
2095 | if (!found) |
2096 | return -ENOENT; | |
2097 | ||
2098 | *_found = found; | |
2099 | return 0; | |
2100 | } | |
2101 | ||
05e343b7 LP |
2102 | int unit_watch_bus_name(Unit *u, const char *name) { |
2103 | assert(u); | |
2104 | assert(name); | |
2105 | ||
2106 | /* Watch a specific name on the bus. We only support one unit | |
2107 | * watching each name for now. */ | |
2108 | ||
ac155bb8 | 2109 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2110 | } |
2111 | ||
2112 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2113 | assert(u); | |
2114 | assert(name); | |
2115 | ||
ac155bb8 | 2116 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2117 | } |
2118 | ||
a16e1123 LP |
2119 | bool unit_can_serialize(Unit *u) { |
2120 | assert(u); | |
2121 | ||
2122 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2123 | } | |
2124 | ||
6b78f9b4 | 2125 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2126 | int r; |
2127 | ||
2128 | assert(u); | |
2129 | assert(f); | |
2130 | assert(fds); | |
2131 | ||
2132 | if (!unit_can_serialize(u)) | |
2133 | return 0; | |
2134 | ||
6fa48533 LP |
2135 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
2136 | if (r < 0) | |
a16e1123 LP |
2137 | return r; |
2138 | ||
cca098b0 | 2139 | |
6b78f9b4 LP |
2140 | if (serialize_jobs) { |
2141 | if (u->job) { | |
2142 | fprintf(f, "job\n"); | |
2143 | job_serialize(u->job, f, fds); | |
2144 | } | |
2145 | ||
2146 | if (u->nop_job) { | |
2147 | fprintf(f, "job\n"); | |
2148 | job_serialize(u->nop_job, f, fds); | |
2149 | } | |
e0209d83 MS |
2150 | } |
2151 | ||
ac155bb8 MS |
2152 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2153 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2154 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2155 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2156 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
2791a8f8 | 2157 | |
ac155bb8 MS |
2158 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2159 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2160 | |
c2756a68 LP |
2161 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
2162 | ||
2163 | if (u->cgroup_path) | |
2164 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
2165 | ||
a16e1123 LP |
2166 | /* End marker */ |
2167 | fputc('\n', f); | |
2168 | return 0; | |
2169 | } | |
2170 | ||
2171 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2172 | va_list ap; | |
2173 | ||
2174 | assert(u); | |
2175 | assert(f); | |
2176 | assert(key); | |
2177 | assert(format); | |
2178 | ||
2179 | fputs(key, f); | |
2180 | fputc('=', f); | |
2181 | ||
2182 | va_start(ap, format); | |
2183 | vfprintf(f, format, ap); | |
2184 | va_end(ap); | |
2185 | ||
2186 | fputc('\n', f); | |
2187 | } | |
2188 | ||
2189 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2190 | assert(u); | |
2191 | assert(f); | |
2192 | assert(key); | |
2193 | assert(value); | |
2194 | ||
2195 | fprintf(f, "%s=%s\n", key, value); | |
2196 | } | |
2197 | ||
2198 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2199 | int r; | |
2200 | ||
2201 | assert(u); | |
2202 | assert(f); | |
2203 | assert(fds); | |
2204 | ||
2205 | if (!unit_can_serialize(u)) | |
2206 | return 0; | |
2207 | ||
2208 | for (;;) { | |
20c03b7b | 2209 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2210 | size_t k; |
2211 | ||
2212 | if (!fgets(line, sizeof(line), f)) { | |
2213 | if (feof(f)) | |
2214 | return 0; | |
2215 | return -errno; | |
2216 | } | |
2217 | ||
10f8e83c | 2218 | char_array_0(line); |
a16e1123 LP |
2219 | l = strstrip(line); |
2220 | ||
2221 | /* End marker */ | |
2222 | if (l[0] == 0) | |
2223 | return 0; | |
2224 | ||
2225 | k = strcspn(l, "="); | |
2226 | ||
2227 | if (l[k] == '=') { | |
2228 | l[k] = 0; | |
2229 | v = l+k+1; | |
2230 | } else | |
2231 | v = l+k; | |
2232 | ||
cca098b0 | 2233 | if (streq(l, "job")) { |
39a18c60 MS |
2234 | if (v[0] == '\0') { |
2235 | /* new-style serialized job */ | |
2236 | Job *j = job_new_raw(u); | |
2237 | if (!j) | |
2238 | return -ENOMEM; | |
2239 | ||
2240 | r = job_deserialize(j, f, fds); | |
2241 | if (r < 0) { | |
2242 | job_free(j); | |
2243 | return r; | |
2244 | } | |
cca098b0 | 2245 | |
39a18c60 MS |
2246 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2247 | if (r < 0) { | |
2248 | job_free(j); | |
2249 | return r; | |
2250 | } | |
e0209d83 MS |
2251 | |
2252 | r = job_install_deserialized(j); | |
2253 | if (r < 0) { | |
2254 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2255 | job_free(j); | |
2256 | return r; | |
2257 | } | |
6b19ad24 MS |
2258 | |
2259 | if (j->state == JOB_RUNNING) | |
2260 | u->manager->n_running_jobs++; | |
39a18c60 MS |
2261 | } else { |
2262 | /* legacy */ | |
2263 | JobType type = job_type_from_string(v); | |
2264 | if (type < 0) | |
2265 | log_debug("Failed to parse job type value %s", v); | |
2266 | else | |
2267 | u->deserialized_job = type; | |
2268 | } | |
cca098b0 | 2269 | continue; |
8aaf019b | 2270 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2271 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2272 | continue; |
2273 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2274 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2275 | continue; |
2276 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2277 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2278 | continue; |
2279 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2280 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2281 | continue; |
2791a8f8 | 2282 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2283 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 LP |
2284 | continue; |
2285 | } else if (streq(l, "condition-result")) { | |
2286 | int b; | |
2287 | ||
c2756a68 LP |
2288 | b = parse_boolean(v); |
2289 | if (b < 0) | |
2791a8f8 LP |
2290 | log_debug("Failed to parse condition result value %s", v); |
2291 | else | |
ac155bb8 | 2292 | u->condition_result = b; |
efbac6d2 LP |
2293 | |
2294 | continue; | |
c2756a68 LP |
2295 | |
2296 | } else if (streq(l, "transient")) { | |
2297 | int b; | |
2298 | ||
2299 | b = parse_boolean(v); | |
2300 | if (b < 0) | |
2301 | log_debug("Failed to parse transient bool %s", v); | |
2302 | else | |
2303 | u->transient = b; | |
2304 | ||
2305 | continue; | |
2306 | } else if (streq(l, "cgroup")) { | |
2307 | char *s; | |
2308 | ||
2309 | s = strdup(v); | |
2310 | if (!v) | |
2311 | return -ENOMEM; | |
2312 | ||
2313 | free(u->cgroup_path); | |
2314 | u->cgroup_path = s; | |
72673e86 LP |
2315 | |
2316 | hashmap_put(u->manager->cgroup_unit, s, u); | |
c2756a68 | 2317 | continue; |
8aaf019b | 2318 | } |
cca098b0 | 2319 | |
c2756a68 LP |
2320 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
2321 | if (r < 0) | |
a16e1123 LP |
2322 | return r; |
2323 | } | |
2324 | } | |
2325 | ||
6e2ef85b LP |
2326 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2327 | Unit *device; | |
2328 | char *e; | |
2329 | int r; | |
2330 | ||
2331 | assert(u); | |
2332 | ||
2333 | if (!what) | |
2334 | return 0; | |
2335 | ||
2336 | /* Adds in links to the device node that this unit is based on */ | |
2337 | ||
8407a5d0 | 2338 | if (!is_device_path(what)) |
6e2ef85b LP |
2339 | return 0; |
2340 | ||
35eb6b12 LP |
2341 | e = unit_name_from_path(what, ".device"); |
2342 | if (!e) | |
6e2ef85b LP |
2343 | return -ENOMEM; |
2344 | ||
ac155bb8 | 2345 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b | 2346 | free(e); |
6e2ef85b LP |
2347 | if (r < 0) |
2348 | return r; | |
2349 | ||
faa368e3 LP |
2350 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true); |
2351 | if (r < 0) | |
6e2ef85b LP |
2352 | return r; |
2353 | ||
faa368e3 LP |
2354 | if (wants) { |
2355 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2356 | if (r < 0) | |
6e2ef85b | 2357 | return r; |
faa368e3 | 2358 | } |
6e2ef85b LP |
2359 | |
2360 | return 0; | |
2361 | } | |
a16e1123 | 2362 | |
cca098b0 LP |
2363 | int unit_coldplug(Unit *u) { |
2364 | int r; | |
2365 | ||
2366 | assert(u); | |
2367 | ||
2368 | if (UNIT_VTABLE(u)->coldplug) | |
2369 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2370 | return r; | |
2371 | ||
39a18c60 MS |
2372 | if (u->job) { |
2373 | r = job_coldplug(u->job); | |
2374 | if (r < 0) | |
2375 | return r; | |
2376 | } else if (u->deserialized_job >= 0) { | |
2377 | /* legacy */ | |
2378 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2379 | if (r < 0) | |
cca098b0 LP |
2380 | return r; |
2381 | ||
ac155bb8 | 2382 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2383 | } |
2384 | ||
2385 | return 0; | |
2386 | } | |
2387 | ||
b1e2b33c CR |
2388 | #pragma GCC diagnostic push |
2389 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
49b1d377 MS |
2390 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
2391 | manager_status_printf(u->manager, false, status, unit_status_msg_format, unit_description(u)); | |
2392 | } | |
b1e2b33c | 2393 | #pragma GCC diagnostic pop |
49b1d377 | 2394 | |
45fb0699 | 2395 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2396 | _cleanup_strv_free_ char **t = NULL; |
2397 | char **path; | |
1b64d026 | 2398 | struct stat st; |
ae7a7182 | 2399 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2400 | |
45fb0699 LP |
2401 | assert(u); |
2402 | ||
ac155bb8 | 2403 | if (u->fragment_path) { |
5f4b19f4 | 2404 | zero(st); |
ac155bb8 | 2405 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2406 | /* What, cannot access this anymore? */ |
2407 | return true; | |
45fb0699 | 2408 | |
ac155bb8 MS |
2409 | if (u->fragment_mtime > 0 && |
2410 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2411 | return true; |
2412 | } | |
2413 | ||
1b64d026 LP |
2414 | if (u->source_path) { |
2415 | zero(st); | |
2416 | if (stat(u->source_path, &st) < 0) | |
2417 | return true; | |
2418 | ||
2419 | if (u->source_mtime > 0 && | |
2420 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2421 | return true; | |
2422 | } | |
5f4b19f4 | 2423 | |
ae7a7182 OS |
2424 | t = unit_find_dropin_paths(u); |
2425 | loaded_cnt = strv_length(t); | |
2426 | current_cnt = strv_length(u->dropin_paths); | |
2427 | ||
2428 | if (loaded_cnt == current_cnt) { | |
2429 | if (loaded_cnt == 0) | |
2430 | return false; | |
2431 | ||
2432 | if (strv_overlap(u->dropin_paths, t)) { | |
2433 | STRV_FOREACH(path, u->dropin_paths) { | |
2434 | zero(st); | |
2435 | if (stat(*path, &st) < 0) | |
2436 | return true; | |
2437 | ||
2438 | if (u->dropin_mtime > 0 && | |
2439 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2440 | return true; | |
2441 | } | |
2442 | ||
2443 | return false; | |
2444 | } else | |
2445 | return true; | |
2446 | } else | |
2447 | return true; | |
45fb0699 LP |
2448 | } |
2449 | ||
fdf20a31 | 2450 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2451 | assert(u); |
2452 | ||
fdf20a31 MM |
2453 | if (UNIT_VTABLE(u)->reset_failed) |
2454 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2455 | } |
2456 | ||
a7f241db LP |
2457 | Unit *unit_following(Unit *u) { |
2458 | assert(u); | |
2459 | ||
2460 | if (UNIT_VTABLE(u)->following) | |
2461 | return UNIT_VTABLE(u)->following(u); | |
2462 | ||
2463 | return NULL; | |
2464 | } | |
2465 | ||
31afa0a4 | 2466 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2467 | assert(u); |
2468 | ||
31afa0a4 LP |
2469 | /* This call does check the current state of the unit. It's |
2470 | * hence useful to be called from state change calls of the | |
2471 | * unit itself, where the state isn't updated yet. This is | |
2472 | * different from unit_inactive_or_pending() which checks both | |
2473 | * the current state and for a queued job. */ | |
18ffdfda | 2474 | |
31afa0a4 LP |
2475 | return u->job && u->job->type == JOB_STOP; |
2476 | } | |
2477 | ||
2478 | bool unit_inactive_or_pending(Unit *u) { | |
2479 | assert(u); | |
2480 | ||
2481 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 2482 | |
d956ac29 LP |
2483 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
2484 | return true; | |
2485 | ||
31afa0a4 | 2486 | if (unit_stop_pending(u)) |
18ffdfda LP |
2487 | return true; |
2488 | ||
2489 | return false; | |
2490 | } | |
2491 | ||
31afa0a4 | 2492 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
2493 | assert(u); |
2494 | ||
f60c2665 | 2495 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2496 | |
2497 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2498 | return true; | |
2499 | ||
ac155bb8 MS |
2500 | if (u->job && |
2501 | (u->job->type == JOB_START || | |
2502 | u->job->type == JOB_RELOAD_OR_START || | |
2503 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2504 | return true; |
2505 | ||
2506 | return false; | |
2507 | } | |
2508 | ||
c74f17d9 | 2509 | int unit_kill(Unit *u, KillWho w, int signo, DBusError *error) { |
8a0867d6 LP |
2510 | assert(u); |
2511 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2512 | assert(signo > 0); |
2513 | assert(signo < _NSIG); | |
2514 | ||
8a0867d6 LP |
2515 | if (!UNIT_VTABLE(u)->kill) |
2516 | return -ENOTSUP; | |
2517 | ||
c74f17d9 | 2518 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2519 | } |
2520 | ||
d91c34f2 LP |
2521 | int unit_kill_common( |
2522 | Unit *u, | |
2523 | KillWho who, | |
2524 | int signo, | |
2525 | pid_t main_pid, | |
2526 | pid_t control_pid, | |
2527 | DBusError *error) { | |
2528 | ||
814cc562 MS |
2529 | int r = 0; |
2530 | ||
2531 | if (who == KILL_MAIN && main_pid <= 0) { | |
2532 | if (main_pid < 0) | |
2533 | dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); | |
2534 | else | |
2535 | dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); | |
2536 | return -ESRCH; | |
2537 | } | |
2538 | ||
2539 | if (who == KILL_CONTROL && control_pid <= 0) { | |
2540 | if (control_pid < 0) | |
2541 | dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); | |
2542 | else | |
2543 | dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); | |
2544 | return -ESRCH; | |
2545 | } | |
2546 | ||
2547 | if (who == KILL_CONTROL || who == KILL_ALL) | |
2548 | if (control_pid > 0) | |
2549 | if (kill(control_pid, signo) < 0) | |
2550 | r = -errno; | |
2551 | ||
2552 | if (who == KILL_MAIN || who == KILL_ALL) | |
2553 | if (main_pid > 0) | |
2554 | if (kill(main_pid, signo) < 0) | |
2555 | r = -errno; | |
2556 | ||
4ad49000 | 2557 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
2558 | _cleanup_set_free_ Set *pid_set = NULL; |
2559 | int q; | |
2560 | ||
2561 | pid_set = set_new(trivial_hash_func, trivial_compare_func); | |
2562 | if (!pid_set) | |
2563 | return -ENOMEM; | |
2564 | ||
2565 | /* Exclude the control/main pid from being killed via the cgroup */ | |
2566 | if (control_pid > 0) { | |
2567 | q = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
2568 | if (q < 0) | |
2569 | return q; | |
2570 | } | |
2571 | ||
2572 | if (main_pid > 0) { | |
2573 | q = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
2574 | if (q < 0) | |
2575 | return q; | |
2576 | } | |
2577 | ||
4ad49000 | 2578 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
2579 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
2580 | r = q; | |
2581 | } | |
2582 | ||
2583 | return r; | |
2584 | } | |
2585 | ||
6210e7fc LP |
2586 | int unit_following_set(Unit *u, Set **s) { |
2587 | assert(u); | |
2588 | assert(s); | |
2589 | ||
2590 | if (UNIT_VTABLE(u)->following_set) | |
2591 | return UNIT_VTABLE(u)->following_set(u, s); | |
2592 | ||
2593 | *s = NULL; | |
2594 | return 0; | |
2595 | } | |
2596 | ||
a4375746 LP |
2597 | UnitFileState unit_get_unit_file_state(Unit *u) { |
2598 | assert(u); | |
2599 | ||
ac155bb8 MS |
2600 | if (u->unit_file_state < 0 && u->fragment_path) |
2601 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 2602 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
9eb977db | 2603 | NULL, path_get_file_name(u->fragment_path)); |
a4375746 | 2604 | |
ac155bb8 | 2605 | return u->unit_file_state; |
a4375746 LP |
2606 | } |
2607 | ||
57020a3a LP |
2608 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
2609 | assert(ref); | |
2610 | assert(u); | |
2611 | ||
2612 | if (ref->unit) | |
2613 | unit_ref_unset(ref); | |
2614 | ||
2615 | ref->unit = u; | |
ac155bb8 | 2616 | LIST_PREPEND(UnitRef, refs, u->refs, ref); |
57020a3a LP |
2617 | return u; |
2618 | } | |
2619 | ||
2620 | void unit_ref_unset(UnitRef *ref) { | |
2621 | assert(ref); | |
2622 | ||
2623 | if (!ref->unit) | |
2624 | return; | |
2625 | ||
ac155bb8 | 2626 | LIST_REMOVE(UnitRef, refs, ref->unit->refs, ref); |
57020a3a LP |
2627 | ref->unit = NULL; |
2628 | } | |
2629 | ||
7c8fa05c LP |
2630 | int unit_add_one_mount_link(Unit *u, Mount *m) { |
2631 | char **i; | |
2632 | ||
2633 | assert(u); | |
2634 | assert(m); | |
2635 | ||
2636 | if (u->load_state != UNIT_LOADED || | |
2637 | UNIT(m)->load_state != UNIT_LOADED) | |
2638 | return 0; | |
2639 | ||
2640 | STRV_FOREACH(i, u->requires_mounts_for) { | |
2641 | ||
2642 | if (UNIT(m) == u) | |
2643 | continue; | |
2644 | ||
2645 | if (!path_startswith(*i, m->where)) | |
2646 | continue; | |
2647 | ||
2648 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true); | |
2649 | } | |
2650 | ||
2651 | return 0; | |
2652 | } | |
2653 | ||
2654 | int unit_add_mount_links(Unit *u) { | |
2655 | Unit *other; | |
2656 | int r; | |
2657 | ||
2658 | assert(u); | |
2659 | ||
2660 | LIST_FOREACH(units_by_type, other, u->manager->units_by_type[UNIT_MOUNT]) { | |
2661 | r = unit_add_one_mount_link(u, MOUNT(other)); | |
2662 | if (r < 0) | |
2663 | return r; | |
2664 | } | |
2665 | ||
2666 | return 0; | |
2667 | } | |
2668 | ||
cba6e062 LP |
2669 | int unit_exec_context_defaults(Unit *u, ExecContext *c) { |
2670 | unsigned i; | |
2671 | int r; | |
2672 | ||
e06c73cc LP |
2673 | assert(u); |
2674 | assert(c); | |
2675 | ||
cba6e062 | 2676 | /* This only copies in the ones that need memory */ |
cba6e062 LP |
2677 | for (i = 0; i < RLIMIT_NLIMITS; i++) |
2678 | if (u->manager->rlimit[i] && !c->rlimit[i]) { | |
2679 | c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
2680 | if (!c->rlimit[i]) | |
2681 | return -ENOMEM; | |
2682 | } | |
2683 | ||
67445f4e | 2684 | if (u->manager->running_as == SYSTEMD_USER && |
cba6e062 | 2685 | !c->working_directory) { |
e06c73cc | 2686 | |
cba6e062 LP |
2687 | r = get_home_dir(&c->working_directory); |
2688 | if (r < 0) | |
2689 | return r; | |
2690 | } | |
2691 | ||
2692 | return 0; | |
e06c73cc LP |
2693 | } |
2694 | ||
3ef63c31 LP |
2695 | ExecContext *unit_get_exec_context(Unit *u) { |
2696 | size_t offset; | |
2697 | assert(u); | |
2698 | ||
2699 | offset = UNIT_VTABLE(u)->exec_context_offset; | |
2700 | if (offset <= 0) | |
2701 | return NULL; | |
2702 | ||
2703 | return (ExecContext*) ((uint8_t*) u + offset); | |
2704 | } | |
2705 | ||
4ad49000 LP |
2706 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
2707 | size_t offset; | |
2708 | ||
2709 | offset = UNIT_VTABLE(u)->cgroup_context_offset; | |
2710 | if (offset <= 0) | |
2711 | return NULL; | |
2712 | ||
2713 | return (CGroupContext*) ((uint8_t*) u + offset); | |
2714 | } | |
2715 | ||
8e2af478 | 2716 | static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, char **_p, char **_q) { |
26d04f86 LP |
2717 | char *p, *q; |
2718 | int r; | |
2719 | ||
71645aca | 2720 | assert(u); |
26d04f86 LP |
2721 | assert(name); |
2722 | assert(_p); | |
2723 | assert(_q); | |
8e2af478 | 2724 | assert(mode & (UNIT_PERSISTENT|UNIT_RUNTIME)); |
71645aca | 2725 | |
71645aca LP |
2726 | if (!filename_is_safe(name)) |
2727 | return -EINVAL; | |
2728 | ||
26d04f86 LP |
2729 | if (u->manager->running_as == SYSTEMD_USER) { |
2730 | _cleanup_free_ char *c = NULL; | |
2731 | ||
2732 | r = user_config_home(&c); | |
2733 | if (r < 0) | |
2734 | return r; | |
2735 | if (r == 0) | |
2736 | return -ENOENT; | |
2737 | ||
2738 | p = strjoin(c, "/", u->id, ".d", NULL); | |
c2756a68 | 2739 | } else if (mode & UNIT_PERSISTENT) |
26d04f86 | 2740 | p = strjoin("/etc/systemd/system/", u->id, ".d", NULL); |
8e2af478 LP |
2741 | else |
2742 | p = strjoin("/run/systemd/system/", u->id, ".d", NULL); | |
71645aca LP |
2743 | if (!p) |
2744 | return -ENOMEM; | |
2745 | ||
241da328 | 2746 | q = strjoin(p, "/90-", name, ".conf", NULL); |
26d04f86 LP |
2747 | if (!q) { |
2748 | free(p); | |
71645aca | 2749 | return -ENOMEM; |
26d04f86 | 2750 | } |
71645aca | 2751 | |
26d04f86 LP |
2752 | *_p = p; |
2753 | *_q = q; | |
2754 | return 0; | |
71645aca LP |
2755 | } |
2756 | ||
8e2af478 | 2757 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
71645aca | 2758 | _cleanup_free_ char *p = NULL, *q = NULL; |
26d04f86 | 2759 | int r; |
71645aca LP |
2760 | |
2761 | assert(u); | |
b42defe3 LP |
2762 | assert(name); |
2763 | assert(data); | |
71645aca | 2764 | |
8e2af478 LP |
2765 | if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME))) |
2766 | return 0; | |
2767 | ||
2768 | r = drop_in_file(u, mode, name, &p, &q); | |
26d04f86 LP |
2769 | if (r < 0) |
2770 | return r; | |
71645aca | 2771 | |
26d04f86 | 2772 | mkdir_p(p, 0755); |
574d5f2d | 2773 | return write_string_file_atomic_label(q, data); |
26d04f86 | 2774 | } |
71645aca | 2775 | |
b42defe3 LP |
2776 | int unit_write_drop_in_private_section(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
2777 | _cleanup_free_ char *ndata = NULL; | |
2778 | ||
2779 | assert(u); | |
2780 | assert(name); | |
2781 | assert(data); | |
2782 | ||
2783 | if (!UNIT_VTABLE(u)->private_section) | |
2784 | return -EINVAL; | |
2785 | ||
2786 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); | |
2787 | if (!ndata) | |
2788 | return -ENOMEM; | |
2789 | ||
2790 | return unit_write_drop_in(u, mode, name, ndata); | |
2791 | } | |
2792 | ||
8e2af478 | 2793 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
2794 | _cleanup_free_ char *p = NULL, *q = NULL; |
2795 | int r; | |
71645aca | 2796 | |
26d04f86 | 2797 | assert(u); |
71645aca | 2798 | |
8e2af478 LP |
2799 | if (!(mode & (UNIT_PERSISTENT|UNIT_RUNTIME))) |
2800 | return 0; | |
2801 | ||
2802 | r = drop_in_file(u, mode, name, &p, &q); | |
71645aca | 2803 | if (unlink(q) < 0) |
241da328 | 2804 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 2805 | else |
241da328 | 2806 | r = 1; |
71645aca LP |
2807 | |
2808 | rmdir(p); | |
26d04f86 | 2809 | return r; |
71645aca LP |
2810 | } |
2811 | ||
c2756a68 LP |
2812 | int unit_make_transient(Unit *u) { |
2813 | int r; | |
2814 | ||
2815 | assert(u); | |
2816 | ||
2817 | u->load_state = UNIT_STUB; | |
2818 | u->load_error = 0; | |
2819 | u->transient = true; | |
2820 | ||
2821 | free(u->fragment_path); | |
2822 | u->fragment_path = NULL; | |
2823 | ||
2824 | if (u->manager->running_as == SYSTEMD_USER) { | |
2825 | _cleanup_free_ char *c = NULL; | |
2826 | ||
2827 | r = user_config_home(&c); | |
2828 | if (r < 0) | |
2829 | return r; | |
2830 | if (r == 0) | |
2831 | return -ENOENT; | |
2832 | ||
2833 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
2834 | if (!u->fragment_path) | |
2835 | return -ENOMEM; | |
2836 | ||
2837 | mkdir_p(c, 0755); | |
2838 | } else { | |
2839 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
2840 | if (!u->fragment_path) | |
2841 | return -ENOMEM; | |
2842 | ||
2843 | mkdir_p("/run/systemd/system", 0755); | |
2844 | } | |
2845 | ||
2846 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
2847 | } | |
2848 | ||
cd2086fe LP |
2849 | int unit_kill_context( |
2850 | Unit *u, | |
2851 | KillContext *c, | |
2852 | bool sigkill, | |
2853 | pid_t main_pid, | |
2854 | pid_t control_pid, | |
2855 | bool main_pid_alien) { | |
2856 | ||
2857 | int sig, wait_for_exit = 0, r; | |
2858 | ||
2859 | assert(u); | |
2860 | assert(c); | |
2861 | ||
2862 | if (c->kill_mode == KILL_NONE) | |
2863 | return 0; | |
2864 | ||
2865 | sig = sigkill ? SIGKILL : c->kill_signal; | |
2866 | ||
2867 | if (main_pid > 0) { | |
2868 | r = kill_and_sigcont(main_pid, sig); | |
2869 | ||
2870 | if (r < 0 && r != -ESRCH) { | |
2871 | _cleanup_free_ char *comm = NULL; | |
2872 | get_process_comm(main_pid, &comm); | |
2873 | ||
2874 | log_warning_unit(u->id, "Failed to kill main process %li (%s): %s", | |
2875 | (long) main_pid, strna(comm), strerror(-r)); | |
2876 | } else | |
2877 | wait_for_exit = !main_pid_alien; | |
2878 | } | |
2879 | ||
2880 | if (control_pid > 0) { | |
2881 | r = kill_and_sigcont(control_pid, sig); | |
2882 | ||
2883 | if (r < 0 && r != -ESRCH) { | |
2884 | _cleanup_free_ char *comm = NULL; | |
2885 | get_process_comm(control_pid, &comm); | |
2886 | ||
2887 | log_warning_unit(u->id, | |
2888 | "Failed to kill control process %li (%s): %s", | |
2889 | (long) control_pid, strna(comm), strerror(-r)); | |
2890 | } else | |
2891 | wait_for_exit = true; | |
2892 | } | |
2893 | ||
4ad49000 | 2894 | if (c->kill_mode == KILL_CONTROL_GROUP && u->cgroup_path) { |
cd2086fe LP |
2895 | _cleanup_set_free_ Set *pid_set = NULL; |
2896 | ||
2897 | pid_set = set_new(trivial_hash_func, trivial_compare_func); | |
2898 | if (!pid_set) | |
2899 | return -ENOMEM; | |
2900 | ||
2901 | /* Exclude the main/control pids from being killed via the cgroup */ | |
2902 | if (main_pid > 0) { | |
2903 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
2904 | if (r < 0) | |
2905 | return r; | |
2906 | } | |
2907 | ||
2908 | if (control_pid > 0) { | |
2909 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
2910 | if (r < 0) | |
2911 | return r; | |
2912 | } | |
2913 | ||
4ad49000 | 2914 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
2915 | if (r < 0) { |
2916 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
2917 | log_warning_unit(u->id, "Failed to kill control group: %s", strerror(-r)); | |
2918 | } else if (r > 0) | |
2919 | wait_for_exit = true; | |
2920 | } | |
2921 | ||
2922 | return wait_for_exit; | |
2923 | } | |
2924 | ||
94f04347 LP |
2925 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
2926 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2927 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2928 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2929 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2930 | [UNIT_ACTIVATING] = "activating", |
2931 | [UNIT_DEACTIVATING] = "deactivating" | |
2932 | }; | |
2933 | ||
2934 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2935 | ||
2936 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2937 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2938 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 | 2939 | [UNIT_REQUISITE] = "Requisite", |
9e2f7c11 | 2940 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
ac6a4abe MS |
2941 | [UNIT_WANTS] = "Wants", |
2942 | [UNIT_BINDS_TO] = "BindsTo", | |
2943 | [UNIT_PART_OF] = "PartOf", | |
94f04347 | 2944 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2945 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 | 2946 | [UNIT_WANTED_BY] = "WantedBy", |
ac6a4abe MS |
2947 | [UNIT_BOUND_BY] = "BoundBy", |
2948 | [UNIT_CONSISTS_OF] = "ConsistsOf", | |
94f04347 | 2949 | [UNIT_CONFLICTS] = "Conflicts", |
69dd2852 | 2950 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
94f04347 LP |
2951 | [UNIT_BEFORE] = "Before", |
2952 | [UNIT_AFTER] = "After", | |
57020a3a LP |
2953 | [UNIT_ON_FAILURE] = "OnFailure", |
2954 | [UNIT_TRIGGERS] = "Triggers", | |
4dcc1cb4 | 2955 | [UNIT_TRIGGERED_BY] = "TriggeredBy", |
7f2cddae | 2956 | [UNIT_PROPAGATES_RELOAD_TO] = "PropagatesReloadTo", |
ac6a4abe MS |
2957 | [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom", |
2958 | [UNIT_REFERENCES] = "References", | |
2959 | [UNIT_REFERENCED_BY] = "ReferencedBy", | |
94f04347 LP |
2960 | }; |
2961 | ||
2962 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |