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