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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 | |
718db961 LP |
32 | #include "sd-id128.h" |
33 | #include "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" |
718db961 | 51 | #include "dbus.h" |
613b411c | 52 | #include "execute.h" |
bc6aed7b | 53 | #include "virt.h" |
87f0e418 LP |
54 | |
55 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
56 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 57 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 58 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 | 59 | [UNIT_TARGET] = &target_vtable, |
e821075a | 60 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
87f0e418 LP |
61 | [UNIT_DEVICE] = &device_vtable, |
62 | [UNIT_MOUNT] = &mount_vtable, | |
63 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 64 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 65 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 66 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
67 | [UNIT_SLICE] = &slice_vtable, |
68 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
69 | }; |
70 | ||
7d17cfbc | 71 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
72 | Unit *u; |
73 | ||
74 | assert(m); | |
ac155bb8 | 75 | assert(size >= sizeof(Unit)); |
87f0e418 | 76 | |
7d17cfbc MS |
77 | u = malloc0(size); |
78 | if (!u) | |
87f0e418 LP |
79 | return NULL; |
80 | ||
ac155bb8 MS |
81 | u->names = set_new(string_hash_func, string_compare_func); |
82 | if (!u->names) { | |
87f0e418 LP |
83 | free(u); |
84 | return NULL; | |
85 | } | |
86 | ||
ac155bb8 MS |
87 | u->manager = m; |
88 | u->type = _UNIT_TYPE_INVALID; | |
89 | u->deserialized_job = _JOB_TYPE_INVALID; | |
90 | u->default_dependencies = true; | |
91 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d420282b | 92 | u->on_failure_job_mode = JOB_REPLACE; |
87f0e418 LP |
93 | |
94 | return u; | |
95 | } | |
96 | ||
f278026d LP |
97 | bool unit_has_name(Unit *u, const char *name) { |
98 | assert(u); | |
99 | assert(name); | |
100 | ||
ac155bb8 | 101 | return !!set_get(u->names, (char*) name); |
f278026d LP |
102 | } |
103 | ||
87f0e418 LP |
104 | int unit_add_name(Unit *u, const char *text) { |
105 | UnitType t; | |
276c3e78 | 106 | char *s, *i = NULL; |
87f0e418 LP |
107 | int r; |
108 | ||
109 | assert(u); | |
110 | assert(text); | |
111 | ||
9e2f7c11 | 112 | if (unit_name_is_template(text)) { |
ac155bb8 | 113 | if (!u->instance) |
9e2f7c11 | 114 | return -EINVAL; |
87f0e418 | 115 | |
ac155bb8 | 116 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
117 | } else |
118 | s = strdup(text); | |
87f0e418 | 119 | |
9e2f7c11 LP |
120 | if (!s) |
121 | return -ENOMEM; | |
87f0e418 | 122 | |
f78e6385 | 123 | if (!unit_name_is_valid(s, TEMPLATE_INVALID)) { |
9e2f7c11 LP |
124 | r = -EINVAL; |
125 | goto fail; | |
126 | } | |
e537352b | 127 | |
9e2f7c11 | 128 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 129 | |
ac155bb8 | 130 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) { |
9e2f7c11 LP |
131 | r = -EINVAL; |
132 | goto fail; | |
133 | } | |
87f0e418 | 134 | |
e48614c4 ZJS |
135 | r = unit_name_to_instance(s, &i); |
136 | if (r < 0) | |
9e2f7c11 | 137 | goto fail; |
87f0e418 | 138 | |
796ba554 LP |
139 | if (i && unit_vtable[t]->no_instances) { |
140 | r = -EINVAL; | |
9e2f7c11 | 141 | goto fail; |
796ba554 | 142 | } |
9e2f7c11 | 143 | |
276c3e78 LP |
144 | /* Ensure that this unit is either instanced or not instanced, |
145 | * but not both. */ | |
ac155bb8 | 146 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) { |
9e2f7c11 LP |
147 | r = -EINVAL; |
148 | goto fail; | |
149 | } | |
150 | ||
151 | if (unit_vtable[t]->no_alias && | |
ac155bb8 MS |
152 | !set_isempty(u->names) && |
153 | !set_get(u->names, s)) { | |
9e2f7c11 LP |
154 | r = -EEXIST; |
155 | goto fail; | |
156 | } | |
157 | ||
ac155bb8 | 158 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) { |
4f0f902f LP |
159 | r = -E2BIG; |
160 | goto fail; | |
161 | } | |
162 | ||
e48614c4 ZJS |
163 | r = set_put(u->names, s); |
164 | if (r < 0) { | |
9e2f7c11 LP |
165 | if (r == -EEXIST) |
166 | r = 0; | |
167 | goto fail; | |
87f0e418 LP |
168 | } |
169 | ||
e48614c4 ZJS |
170 | r = hashmap_put(u->manager->units, s, u); |
171 | if (r < 0) { | |
ac155bb8 | 172 | set_remove(u->names, s); |
9e2f7c11 | 173 | goto fail; |
87f0e418 LP |
174 | } |
175 | ||
ac155bb8 | 176 | if (u->type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 177 | |
ac155bb8 MS |
178 | u->type = t; |
179 | u->id = s; | |
180 | u->instance = i; | |
9e2f7c11 | 181 | |
71fda00f | 182 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b LP |
183 | |
184 | if (UNIT_VTABLE(u)->init) | |
185 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
186 | } else |
187 | free(i); | |
87f0e418 | 188 | |
c1e1601e | 189 | unit_add_to_dbus_queue(u); |
87f0e418 | 190 | return 0; |
9e2f7c11 LP |
191 | |
192 | fail: | |
193 | free(s); | |
194 | free(i); | |
195 | ||
196 | return r; | |
87f0e418 LP |
197 | } |
198 | ||
0ae97ec1 | 199 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd RC |
200 | char *s, *i; |
201 | _cleanup_free_ char *t = NULL; | |
276c3e78 | 202 | int r; |
0ae97ec1 LP |
203 | |
204 | assert(u); | |
205 | assert(name); | |
206 | ||
9e2f7c11 LP |
207 | if (unit_name_is_template(name)) { |
208 | ||
ac155bb8 | 209 | if (!u->instance) |
9e2f7c11 LP |
210 | return -EINVAL; |
211 | ||
e48614c4 ZJS |
212 | t = unit_name_replace_instance(name, u->instance); |
213 | if (!t) | |
9e2f7c11 LP |
214 | return -ENOMEM; |
215 | ||
216 | name = t; | |
217 | } | |
218 | ||
0ae97ec1 | 219 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 220 | s = set_get(u->names, (char*) name); |
0ae97ec1 | 221 | |
9e2f7c11 | 222 | if (!s) |
0ae97ec1 LP |
223 | return -ENOENT; |
224 | ||
e48614c4 ZJS |
225 | r = unit_name_to_instance(s, &i); |
226 | if (r < 0) | |
276c3e78 LP |
227 | return r; |
228 | ||
ac155bb8 | 229 | u->id = s; |
276c3e78 | 230 | |
ac155bb8 MS |
231 | free(u->instance); |
232 | u->instance = i; | |
276c3e78 | 233 | |
c1e1601e | 234 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 235 | |
0ae97ec1 LP |
236 | return 0; |
237 | } | |
238 | ||
f50e0a01 LP |
239 | int unit_set_description(Unit *u, const char *description) { |
240 | char *s; | |
241 | ||
242 | assert(u); | |
243 | ||
8aec412f LP |
244 | if (isempty(description)) |
245 | s = NULL; | |
246 | else { | |
247 | s = strdup(description); | |
248 | if (!s) | |
249 | return -ENOMEM; | |
250 | } | |
f50e0a01 | 251 | |
ac155bb8 MS |
252 | free(u->description); |
253 | u->description = s; | |
c1e1601e LP |
254 | |
255 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
256 | return 0; |
257 | } | |
258 | ||
701cc384 LP |
259 | bool unit_check_gc(Unit *u) { |
260 | assert(u); | |
261 | ||
262 | if (UNIT_VTABLE(u)->no_gc) | |
263 | return true; | |
264 | ||
ac155bb8 | 265 | if (u->no_gc) |
6c073082 LP |
266 | return true; |
267 | ||
ac155bb8 | 268 | if (u->job) |
701cc384 LP |
269 | return true; |
270 | ||
e0209d83 MS |
271 | if (u->nop_job) |
272 | return true; | |
273 | ||
701cc384 LP |
274 | if (unit_active_state(u) != UNIT_INACTIVE) |
275 | return true; | |
276 | ||
9d576438 LP |
277 | if (u->refs) |
278 | return true; | |
279 | ||
701cc384 LP |
280 | if (UNIT_VTABLE(u)->check_gc) |
281 | if (UNIT_VTABLE(u)->check_gc(u)) | |
282 | return true; | |
283 | ||
284 | return false; | |
285 | } | |
286 | ||
87f0e418 LP |
287 | void unit_add_to_load_queue(Unit *u) { |
288 | assert(u); | |
ac155bb8 | 289 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 290 | |
ac155bb8 | 291 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
292 | return; |
293 | ||
71fda00f | 294 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 295 | u->in_load_queue = true; |
87f0e418 LP |
296 | } |
297 | ||
23a177ef LP |
298 | void unit_add_to_cleanup_queue(Unit *u) { |
299 | assert(u); | |
300 | ||
ac155bb8 | 301 | if (u->in_cleanup_queue) |
23a177ef LP |
302 | return; |
303 | ||
71fda00f | 304 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 305 | u->in_cleanup_queue = true; |
23a177ef LP |
306 | } |
307 | ||
701cc384 LP |
308 | void unit_add_to_gc_queue(Unit *u) { |
309 | assert(u); | |
310 | ||
ac155bb8 | 311 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
312 | return; |
313 | ||
314 | if (unit_check_gc(u)) | |
315 | return; | |
316 | ||
71fda00f | 317 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 318 | u->in_gc_queue = true; |
701cc384 | 319 | |
ac155bb8 | 320 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
321 | } |
322 | ||
c1e1601e LP |
323 | void unit_add_to_dbus_queue(Unit *u) { |
324 | assert(u); | |
ac155bb8 | 325 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 326 | |
ac155bb8 | 327 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
328 | return; |
329 | ||
a567261a | 330 | /* Shortcut things if nobody cares */ |
718db961 | 331 | if (set_isempty(u->manager->subscribed)) { |
ac155bb8 | 332 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
333 | return; |
334 | } | |
335 | ||
71fda00f | 336 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 337 | u->in_dbus_queue = true; |
c1e1601e LP |
338 | } |
339 | ||
87f0e418 LP |
340 | static void bidi_set_free(Unit *u, Set *s) { |
341 | Iterator i; | |
342 | Unit *other; | |
343 | ||
344 | assert(u); | |
345 | ||
346 | /* Frees the set and makes sure we are dropped from the | |
347 | * inverse pointers */ | |
348 | ||
349 | SET_FOREACH(other, s, i) { | |
350 | UnitDependency d; | |
351 | ||
352 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 353 | set_remove(other->dependencies[d], u); |
701cc384 LP |
354 | |
355 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
356 | } |
357 | ||
358 | set_free(s); | |
359 | } | |
360 | ||
c2756a68 LP |
361 | static void unit_remove_transient(Unit *u) { |
362 | char **i; | |
363 | ||
364 | assert(u); | |
365 | ||
366 | if (!u->transient) | |
367 | return; | |
368 | ||
369 | if (u->fragment_path) | |
370 | unlink(u->fragment_path); | |
371 | ||
372 | STRV_FOREACH(i, u->dropin_paths) { | |
373 | _cleanup_free_ char *p = NULL; | |
374 | int r; | |
375 | ||
376 | unlink(*i); | |
377 | ||
378 | r = path_get_parent(*i, &p); | |
379 | if (r >= 0) | |
380 | rmdir(p); | |
381 | } | |
382 | } | |
383 | ||
a57f7e2c LP |
384 | static void unit_free_requires_mounts_for(Unit *u) { |
385 | char **j; | |
386 | ||
387 | STRV_FOREACH(j, u->requires_mounts_for) { | |
388 | char s[strlen(*j) + 1]; | |
389 | ||
390 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
391 | char *y; | |
392 | Set *x; | |
393 | ||
394 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
395 | if (!x) | |
396 | continue; | |
397 | ||
398 | set_remove(x, u); | |
399 | ||
400 | if (set_isempty(x)) { | |
401 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
402 | free(y); | |
403 | set_free(x); | |
404 | } | |
405 | } | |
406 | } | |
407 | ||
408 | strv_free(u->requires_mounts_for); | |
409 | u->requires_mounts_for = NULL; | |
410 | } | |
411 | ||
87f0e418 LP |
412 | void unit_free(Unit *u) { |
413 | UnitDependency d; | |
414 | Iterator i; | |
415 | char *t; | |
416 | ||
417 | assert(u); | |
418 | ||
c2756a68 LP |
419 | if (u->manager->n_reloading <= 0) |
420 | unit_remove_transient(u); | |
421 | ||
c1e1601e LP |
422 | bus_unit_send_removed_signal(u); |
423 | ||
ac155bb8 | 424 | if (u->load_state != UNIT_STUB) |
a013b84b LP |
425 | if (UNIT_VTABLE(u)->done) |
426 | UNIT_VTABLE(u)->done(u); | |
427 | ||
a57f7e2c LP |
428 | unit_free_requires_mounts_for(u); |
429 | ||
ac155bb8 MS |
430 | SET_FOREACH(t, u->names, i) |
431 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 432 | |
97e7d748 MS |
433 | if (u->job) { |
434 | Job *j = u->job; | |
435 | job_uninstall(j); | |
436 | job_free(j); | |
437 | } | |
964e0949 | 438 | |
e0209d83 MS |
439 | if (u->nop_job) { |
440 | Job *j = u->nop_job; | |
441 | job_uninstall(j); | |
442 | job_free(j); | |
443 | } | |
444 | ||
964e0949 | 445 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 446 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 447 | |
ac155bb8 | 448 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 449 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 450 | |
ac155bb8 | 451 | if (u->in_load_queue) |
71fda00f | 452 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 453 | |
ac155bb8 | 454 | if (u->in_dbus_queue) |
71fda00f | 455 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 456 | |
ac155bb8 | 457 | if (u->in_cleanup_queue) |
71fda00f | 458 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 459 | |
ac155bb8 | 460 | if (u->in_gc_queue) { |
71fda00f | 461 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 462 | u->manager->n_in_gc_queue--; |
701cc384 LP |
463 | } |
464 | ||
4ad49000 | 465 | if (u->in_cgroup_queue) |
71fda00f | 466 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 467 | |
72673e86 LP |
468 | if (u->cgroup_path) { |
469 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
470 | free(u->cgroup_path); | |
471 | } | |
472 | ||
ac155bb8 | 473 | free(u->description); |
49dbfa7b | 474 | strv_free(u->documentation); |
ac155bb8 | 475 | free(u->fragment_path); |
1b64d026 | 476 | free(u->source_path); |
ae7a7182 | 477 | strv_free(u->dropin_paths); |
ac155bb8 | 478 | free(u->instance); |
87f0e418 | 479 | |
ac155bb8 | 480 | set_free_free(u->names); |
87f0e418 | 481 | |
a911bb9a LP |
482 | unit_unwatch_all_pids(u); |
483 | ||
ac155bb8 | 484 | condition_free_list(u->conditions); |
52661efd | 485 | |
702a2d8f LP |
486 | unit_ref_unset(&u->slice); |
487 | ||
ac155bb8 MS |
488 | while (u->refs) |
489 | unit_ref_unset(u->refs); | |
57020a3a | 490 | |
87f0e418 LP |
491 | free(u); |
492 | } | |
493 | ||
494 | UnitActiveState unit_active_state(Unit *u) { | |
495 | assert(u); | |
496 | ||
ac155bb8 | 497 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
498 | return unit_active_state(unit_follow_merge(u)); |
499 | ||
500 | /* After a reload it might happen that a unit is not correctly | |
501 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 502 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
503 | |
504 | return UNIT_VTABLE(u)->active_state(u); | |
505 | } | |
506 | ||
10a94420 LP |
507 | const char* unit_sub_state_to_string(Unit *u) { |
508 | assert(u); | |
509 | ||
510 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
511 | } | |
512 | ||
23a177ef LP |
513 | static void complete_move(Set **s, Set **other) { |
514 | assert(s); | |
515 | assert(other); | |
87f0e418 | 516 | |
23a177ef LP |
517 | if (!*other) |
518 | return; | |
87f0e418 LP |
519 | |
520 | if (*s) | |
23a177ef LP |
521 | set_move(*s, *other); |
522 | else { | |
523 | *s = *other; | |
524 | *other = NULL; | |
525 | } | |
526 | } | |
87f0e418 | 527 | |
23a177ef LP |
528 | static void merge_names(Unit *u, Unit *other) { |
529 | char *t; | |
530 | Iterator i; | |
87f0e418 | 531 | |
23a177ef LP |
532 | assert(u); |
533 | assert(other); | |
534 | ||
ac155bb8 | 535 | complete_move(&u->names, &other->names); |
23a177ef | 536 | |
ac155bb8 MS |
537 | set_free_free(other->names); |
538 | other->names = NULL; | |
539 | other->id = NULL; | |
23a177ef | 540 | |
ac155bb8 MS |
541 | SET_FOREACH(t, u->names, i) |
542 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
87f0e418 LP |
543 | } |
544 | ||
23a177ef LP |
545 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
546 | Iterator i; | |
547 | Unit *back; | |
87f0e418 | 548 | int r; |
23a177ef LP |
549 | |
550 | assert(u); | |
551 | assert(other); | |
552 | assert(d < _UNIT_DEPENDENCY_MAX); | |
553 | ||
83a95334 | 554 | /* Fix backwards pointers */ |
ac155bb8 | 555 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
556 | UnitDependency k; |
557 | ||
e48614c4 ZJS |
558 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
559 | r = set_remove_and_put(back->dependencies[k], other, u); | |
560 | if (r == -EEXIST) | |
561 | set_remove(back->dependencies[k], other); | |
562 | else | |
563 | assert(r >= 0 || r == -ENOENT); | |
564 | } | |
23a177ef LP |
565 | } |
566 | ||
ac155bb8 | 567 | complete_move(&u->dependencies[d], &other->dependencies[d]); |
23a177ef | 568 | |
ac155bb8 MS |
569 | set_free(other->dependencies[d]); |
570 | other->dependencies[d] = NULL; | |
23a177ef LP |
571 | } |
572 | ||
573 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
574 | UnitDependency d; |
575 | ||
576 | assert(u); | |
577 | assert(other); | |
ac155bb8 MS |
578 | assert(u->manager == other->manager); |
579 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 580 | |
cc916967 LP |
581 | other = unit_follow_merge(other); |
582 | ||
23a177ef LP |
583 | if (other == u) |
584 | return 0; | |
585 | ||
ac155bb8 | 586 | if (u->type != other->type) |
9e2f7c11 LP |
587 | return -EINVAL; |
588 | ||
ac155bb8 | 589 | if (!u->instance != !other->instance) |
87f0e418 LP |
590 | return -EINVAL; |
591 | ||
ac155bb8 | 592 | if (other->load_state != UNIT_STUB && |
c2756a68 | 593 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 594 | return -EEXIST; |
87f0e418 | 595 | |
ac155bb8 | 596 | if (other->job) |
819e213f LP |
597 | return -EEXIST; |
598 | ||
e0209d83 MS |
599 | if (other->nop_job) |
600 | return -EEXIST; | |
601 | ||
fdf20a31 | 602 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
603 | return -EEXIST; |
604 | ||
87f0e418 | 605 | /* Merge names */ |
23a177ef | 606 | merge_names(u, other); |
87f0e418 | 607 | |
57020a3a | 608 | /* Redirect all references */ |
ac155bb8 MS |
609 | while (other->refs) |
610 | unit_ref_set(other->refs, u); | |
57020a3a | 611 | |
87f0e418 LP |
612 | /* Merge dependencies */ |
613 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 614 | merge_dependencies(u, other, d); |
87f0e418 | 615 | |
ac155bb8 MS |
616 | other->load_state = UNIT_MERGED; |
617 | other->merged_into = u; | |
23a177ef | 618 | |
3616a49c LP |
619 | /* If there is still some data attached to the other node, we |
620 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 621 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
622 | if (UNIT_VTABLE(other)->done) |
623 | UNIT_VTABLE(other)->done(other); | |
624 | ||
625 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
626 | unit_add_to_cleanup_queue(other); |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
631 | int unit_merge_by_name(Unit *u, const char *name) { | |
632 | Unit *other; | |
9e2f7c11 | 633 | int r; |
68eda4bd | 634 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
635 | |
636 | assert(u); | |
637 | assert(name); | |
638 | ||
9e2f7c11 | 639 | if (unit_name_is_template(name)) { |
ac155bb8 | 640 | if (!u->instance) |
9e2f7c11 LP |
641 | return -EINVAL; |
642 | ||
e48614c4 ZJS |
643 | s = unit_name_replace_instance(name, u->instance); |
644 | if (!s) | |
9e2f7c11 LP |
645 | return -ENOMEM; |
646 | ||
647 | name = s; | |
648 | } | |
649 | ||
c2756a68 LP |
650 | other = manager_get_unit(u->manager, name); |
651 | if (!other) | |
9e2f7c11 LP |
652 | r = unit_add_name(u, name); |
653 | else | |
654 | r = unit_merge(u, other); | |
23a177ef | 655 | |
9e2f7c11 | 656 | return r; |
23a177ef LP |
657 | } |
658 | ||
659 | Unit* unit_follow_merge(Unit *u) { | |
660 | assert(u); | |
661 | ||
ac155bb8 MS |
662 | while (u->load_state == UNIT_MERGED) |
663 | assert_se(u = u->merged_into); | |
23a177ef LP |
664 | |
665 | return u; | |
666 | } | |
667 | ||
668 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
669 | int r; | |
670 | ||
671 | assert(u); | |
672 | assert(c); | |
673 | ||
36be24c8 ZJS |
674 | if (c->working_directory) { |
675 | r = unit_require_mounts_for(u, c->working_directory); | |
676 | if (r < 0) | |
677 | return r; | |
678 | } | |
679 | ||
680 | if (c->root_directory) { | |
681 | r = unit_require_mounts_for(u, c->root_directory); | |
682 | if (r < 0) | |
683 | return r; | |
684 | } | |
685 | ||
ecc6e2b8 LP |
686 | if (c->std_output != EXEC_OUTPUT_KMSG && |
687 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 688 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
689 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
690 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 691 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 692 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 693 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 694 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 695 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 696 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 697 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
698 | return 0; |
699 | ||
700 | /* If syslog or kernel logging is requested, make sure our own | |
701 | * logging daemon is run first. */ | |
702 | ||
9d246da3 MS |
703 | if (u->manager->running_as == SYSTEMD_SYSTEM) { |
704 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); | |
705 | if (r < 0) | |
23a177ef | 706 | return r; |
9d246da3 | 707 | } |
23a177ef | 708 | |
87f0e418 LP |
709 | return 0; |
710 | } | |
711 | ||
87f0e418 LP |
712 | const char *unit_description(Unit *u) { |
713 | assert(u); | |
714 | ||
ac155bb8 MS |
715 | if (u->description) |
716 | return u->description; | |
87f0e418 | 717 | |
ac155bb8 | 718 | return strna(u->id); |
87f0e418 LP |
719 | } |
720 | ||
721 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 722 | char *t, **j; |
87f0e418 LP |
723 | UnitDependency d; |
724 | Iterator i; | |
68eda4bd | 725 | _cleanup_free_ char *p2 = NULL; |
47be870b | 726 | const char *prefix2; |
173e3821 LP |
727 | char |
728 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
729 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
730 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
731 | timestamp4[FORMAT_TIMESTAMP_MAX], |
732 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 733 | Unit *following; |
eeaedb7c LP |
734 | _cleanup_set_free_ Set *following_set = NULL; |
735 | int r; | |
87f0e418 LP |
736 | |
737 | assert(u); | |
ac155bb8 | 738 | assert(u->type >= 0); |
87f0e418 LP |
739 | |
740 | if (!prefix) | |
741 | prefix = ""; | |
47be870b LP |
742 | p2 = strappend(prefix, "\t"); |
743 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
744 | |
745 | fprintf(f, | |
40d50879 | 746 | "%s-> Unit %s:\n" |
87f0e418 | 747 | "%s\tDescription: %s\n" |
9e2f7c11 | 748 | "%s\tInstance: %s\n" |
87f0e418 | 749 | "%s\tUnit Load State: %s\n" |
2fad8195 | 750 | "%s\tUnit Active State: %s\n" |
173e3821 | 751 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 752 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 753 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 754 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 755 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 756 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 757 | "%s\tTransient: %s\n" |
4ad49000 LP |
758 | "%s\tSlice: %s\n" |
759 | "%s\tCGroup: %s\n" | |
760 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
761 | "%s\tCGroup mask: 0x%x\n" |
762 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 763 | prefix, u->id, |
87f0e418 | 764 | prefix, unit_description(u), |
ac155bb8 MS |
765 | prefix, strna(u->instance), |
766 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 767 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
768 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
769 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
770 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
771 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 772 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 773 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 774 | prefix, yes_no(u->transient), |
4ad49000 LP |
775 | prefix, strna(unit_slice_name(u)), |
776 | prefix, strna(u->cgroup_path), | |
777 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 778 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 779 | prefix, u->cgroup_members_mask); |
0301abf4 | 780 | |
ac155bb8 | 781 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
782 | fprintf(f, "%s\tName: %s\n", prefix, t); |
783 | ||
49dbfa7b LP |
784 | STRV_FOREACH(j, u->documentation) |
785 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
786 | ||
eeaedb7c LP |
787 | following = unit_following(u); |
788 | if (following) | |
ac155bb8 | 789 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 790 | |
eeaedb7c LP |
791 | r = unit_following_set(u, &following_set); |
792 | if (r >= 0) { | |
793 | Unit *other; | |
794 | ||
795 | SET_FOREACH(other, following_set, i) | |
796 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
797 | } | |
798 | ||
ac155bb8 MS |
799 | if (u->fragment_path) |
800 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 801 | |
1b64d026 LP |
802 | if (u->source_path) |
803 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
804 | ||
ae7a7182 | 805 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 806 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 807 | |
ac155bb8 | 808 | if (u->job_timeout > 0) |
2fa4092c | 809 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 810 | |
ac155bb8 | 811 | condition_dump_list(u->conditions, f, prefix); |
52661efd | 812 | |
ac155bb8 | 813 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
814 | fprintf(f, |
815 | "%s\tCondition Timestamp: %s\n" | |
816 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
817 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
818 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 819 | |
87f0e418 LP |
820 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
821 | Unit *other; | |
822 | ||
ac155bb8 MS |
823 | SET_FOREACH(other, u->dependencies[d], i) |
824 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
825 | } |
826 | ||
7c8fa05c | 827 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
828 | fprintf(f, |
829 | "%s\tRequiresMountsFor:", prefix); | |
830 | ||
831 | STRV_FOREACH(j, u->requires_mounts_for) | |
832 | fprintf(f, " %s", *j); | |
833 | ||
834 | fputs("\n", f); | |
835 | } | |
836 | ||
ac155bb8 | 837 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 838 | |
b0650475 | 839 | fprintf(f, |
a40eb732 | 840 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
841 | "%s\tRefuseManualStart: %s\n" |
842 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 843 | "%s\tDefaultDependencies: %s\n" |
d420282b | 844 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
845 | "%s\tIgnoreOnIsolate: %s\n" |
846 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
847 | prefix, yes_no(u->stop_when_unneeded), |
848 | prefix, yes_no(u->refuse_manual_start), | |
849 | prefix, yes_no(u->refuse_manual_stop), | |
850 | prefix, yes_no(u->default_dependencies), | |
d420282b | 851 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
852 | prefix, yes_no(u->ignore_on_isolate), |
853 | prefix, yes_no(u->ignore_on_snapshot)); | |
854 | ||
23a177ef LP |
855 | if (UNIT_VTABLE(u)->dump) |
856 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 857 | |
ac155bb8 | 858 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
859 | fprintf(f, |
860 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
861 | prefix, u->merged_into->id); |
862 | else if (u->load_state == UNIT_ERROR) | |
863 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 864 | |
87f0e418 | 865 | |
ac155bb8 MS |
866 | if (u->job) |
867 | job_dump(u->job, f, prefix2); | |
87f0e418 | 868 | |
e0209d83 MS |
869 | if (u->nop_job) |
870 | job_dump(u->nop_job, f, prefix2); | |
871 | ||
87f0e418 LP |
872 | } |
873 | ||
874 | /* Common implementation for multiple backends */ | |
e537352b | 875 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
876 | int r; |
877 | ||
878 | assert(u); | |
23a177ef | 879 | |
e48614c4 | 880 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
881 | r = unit_load_fragment(u); |
882 | if (r < 0) | |
23a177ef LP |
883 | return r; |
884 | ||
ac155bb8 | 885 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
886 | return -ENOENT; |
887 | ||
888 | /* Load drop-in directory data */ | |
4ad49000 LP |
889 | r = unit_load_dropin(unit_follow_merge(u)); |
890 | if (r < 0) | |
23a177ef LP |
891 | return r; |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | /* Common implementation for multiple backends */ | |
e537352b | 897 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 898 | int r; |
87f0e418 LP |
899 | |
900 | assert(u); | |
901 | ||
23a177ef LP |
902 | /* Same as unit_load_fragment_and_dropin(), but whether |
903 | * something can be loaded or not doesn't matter. */ | |
904 | ||
905 | /* Load a .service file */ | |
4ad49000 LP |
906 | r = unit_load_fragment(u); |
907 | if (r < 0) | |
87f0e418 LP |
908 | return r; |
909 | ||
ac155bb8 MS |
910 | if (u->load_state == UNIT_STUB) |
911 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 912 | |
87f0e418 | 913 | /* Load drop-in directory data */ |
4ad49000 LP |
914 | r = unit_load_dropin(unit_follow_merge(u)); |
915 | if (r < 0) | |
87f0e418 LP |
916 | return r; |
917 | ||
23a177ef | 918 | return 0; |
87f0e418 LP |
919 | } |
920 | ||
bba34eed | 921 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
922 | assert(u); |
923 | assert(target); | |
924 | ||
ac155bb8 | 925 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
926 | return 0; |
927 | ||
35b8ca3a | 928 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 929 | * that loop check below is reliable */ |
ac155bb8 MS |
930 | if (u->load_state != UNIT_LOADED || |
931 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
932 | return 0; |
933 | ||
21256a2b LP |
934 | /* If either side wants no automatic dependencies, then let's |
935 | * skip this */ | |
ac155bb8 MS |
936 | if (!u->default_dependencies || |
937 | !target->default_dependencies) | |
21256a2b LP |
938 | return 0; |
939 | ||
98bc2000 | 940 | /* Don't create loops */ |
ac155bb8 | 941 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
942 | return 0; |
943 | ||
944 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
945 | } | |
946 | ||
e954c9cf | 947 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 948 | |
21256a2b LP |
949 | static const UnitDependency deps[] = { |
950 | UNIT_REQUIRED_BY, | |
951 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
952 | UNIT_WANTED_BY, | |
953 | UNIT_BOUND_BY | |
954 | }; | |
955 | ||
bba34eed | 956 | Unit *target; |
98bc2000 | 957 | Iterator i; |
21256a2b | 958 | unsigned k; |
db57f3c6 | 959 | int r = 0; |
98bc2000 LP |
960 | |
961 | assert(u); | |
962 | ||
21256a2b | 963 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
964 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
965 | r = unit_add_default_target_dependency(u, target); | |
966 | if (r < 0) | |
21256a2b | 967 | return r; |
a016b922 LP |
968 | } |
969 | ||
e954c9cf LP |
970 | return r; |
971 | } | |
4ad49000 | 972 | |
e954c9cf LP |
973 | static int unit_add_slice_dependencies(Unit *u) { |
974 | assert(u); | |
b81884e7 | 975 | |
e954c9cf LP |
976 | if (!unit_get_cgroup_context(u)) |
977 | return 0; | |
978 | ||
979 | if (UNIT_ISSET(u->slice)) | |
980 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
981 | ||
982 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); | |
98bc2000 LP |
983 | } |
984 | ||
e954c9cf | 985 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
986 | char **i; |
987 | int r; | |
988 | ||
989 | assert(u); | |
990 | ||
991 | STRV_FOREACH(i, u->requires_mounts_for) { | |
992 | char prefix[strlen(*i) + 1]; | |
993 | ||
994 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
995 | Unit *m; | |
996 | ||
997 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
998 | if (r < 0) | |
999 | return r; | |
1000 | if (r == 0) | |
1001 | continue; | |
1002 | if (m == u) | |
1003 | continue; | |
1004 | ||
1005 | if (m->load_state != UNIT_LOADED) | |
1006 | continue; | |
1007 | ||
1008 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1009 | if (r < 0) | |
1010 | return r; | |
1011 | ||
1012 | if (m->fragment_path) { | |
1013 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1014 | if (r < 0) | |
1015 | return r; | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
87f0e418 LP |
1023 | int unit_load(Unit *u) { |
1024 | int r; | |
1025 | ||
1026 | assert(u); | |
1027 | ||
ac155bb8 | 1028 | if (u->in_load_queue) { |
71fda00f | 1029 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1030 | u->in_load_queue = false; |
87f0e418 LP |
1031 | } |
1032 | ||
ac155bb8 | 1033 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1034 | return -EINVAL; |
1035 | ||
ac155bb8 | 1036 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1037 | return 0; |
1038 | ||
c2756a68 LP |
1039 | if (UNIT_VTABLE(u)->load) { |
1040 | r = UNIT_VTABLE(u)->load(u); | |
1041 | if (r < 0) | |
87f0e418 | 1042 | goto fail; |
c2756a68 | 1043 | } |
23a177ef | 1044 | |
ac155bb8 | 1045 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1046 | r = -ENOENT; |
1047 | goto fail; | |
1048 | } | |
1049 | ||
7c8fa05c | 1050 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1051 | |
e954c9cf LP |
1052 | r = unit_add_target_dependencies(u); |
1053 | if (r < 0) | |
1054 | goto fail; | |
1055 | ||
1056 | r = unit_add_slice_dependencies(u); | |
1057 | if (r < 0) | |
1058 | goto fail; | |
c2756a68 | 1059 | |
e954c9cf | 1060 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1061 | if (r < 0) |
c2756a68 | 1062 | goto fail; |
7c8fa05c | 1063 | |
bc432dc7 LP |
1064 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
1065 | log_error_unit(u->id, "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id); | |
c2756a68 LP |
1066 | r = -EINVAL; |
1067 | goto fail; | |
1068 | } | |
bc432dc7 LP |
1069 | |
1070 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1071 | } |
1072 | ||
ac155bb8 | 1073 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1074 | |
1075 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1076 | unit_add_to_gc_queue(u); |
87f0e418 | 1077 | |
87f0e418 LP |
1078 | return 0; |
1079 | ||
1080 | fail: | |
c2756a68 | 1081 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1082 | u->load_error = r; |
c1e1601e | 1083 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1084 | unit_add_to_gc_queue(u); |
23a177ef | 1085 | |
c1b6628d ZJS |
1086 | log_debug_unit(u->id, "Failed to load configuration for %s: %s", |
1087 | u->id, strerror(-r)); | |
23a177ef | 1088 | |
87f0e418 LP |
1089 | return r; |
1090 | } | |
1091 | ||
9588bc32 | 1092 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1093 | assert(u); |
1094 | ||
ac155bb8 | 1095 | dual_timestamp_get(&u->condition_timestamp); |
4b744dfa | 1096 | u->condition_result = condition_test_list(u->id, u->conditions); |
90bbc946 | 1097 | |
ac155bb8 | 1098 | return u->condition_result; |
90bbc946 LP |
1099 | } |
1100 | ||
44a6b1b6 | 1101 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 1102 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1103 | |
1104 | assert(u); | |
1105 | assert(t >= 0); | |
1106 | assert(t < _JOB_TYPE_MAX); | |
1107 | ||
1108 | if (t != JOB_START && t != JOB_STOP) | |
1109 | return NULL; | |
c6918296 MS |
1110 | |
1111 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1112 | if (!format_table) | |
877d54e9 LP |
1113 | return NULL; |
1114 | ||
1115 | return format_table->starting_stopping[t == JOB_STOP]; | |
1116 | } | |
1117 | ||
44a6b1b6 | 1118 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { |
877d54e9 LP |
1119 | const char *format; |
1120 | ||
1121 | assert(u); | |
1122 | assert(t >= 0); | |
1123 | assert(t < _JOB_TYPE_MAX); | |
1124 | ||
1125 | format = unit_get_status_message_format(u, t); | |
1126 | if (format) | |
1127 | return format; | |
1128 | ||
1129 | /* Return generic strings */ | |
1130 | if (t == JOB_START) | |
1131 | return "Starting %s."; | |
1132 | else if (t == JOB_STOP) | |
1133 | return "Stopping %s."; | |
1134 | else if (t == JOB_RELOAD) | |
1135 | return "Reloading %s."; | |
1136 | ||
1137 | return NULL; | |
1138 | } | |
1139 | ||
1140 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1141 | const char *format; | |
1142 | ||
1143 | assert(u); | |
1144 | ||
1145 | /* We only print status messages for selected units on | |
1146 | * selected operations. */ | |
c6918296 | 1147 | |
877d54e9 | 1148 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
1149 | if (!format) |
1150 | return; | |
1151 | ||
bcfce235 | 1152 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1153 | unit_status_printf(u, "", format); |
bcfce235 | 1154 | REENABLE_WARNING; |
c6918296 MS |
1155 | } |
1156 | ||
877d54e9 LP |
1157 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1158 | const char *format; | |
1159 | char buf[LINE_MAX]; | |
1160 | sd_id128_t mid; | |
1161 | ||
1162 | assert(u); | |
1163 | ||
1164 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1165 | return; | |
1166 | ||
81270860 LP |
1167 | if (log_on_console()) |
1168 | return; | |
1169 | ||
877d54e9 LP |
1170 | /* We log status messages for all units and all operations. */ |
1171 | ||
1172 | format = unit_get_status_message_format_try_harder(u, t); | |
1173 | if (!format) | |
1174 | return; | |
1175 | ||
bcfce235 | 1176 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 LP |
1177 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
1178 | char_array_0(buf); | |
bcfce235 | 1179 | REENABLE_WARNING; |
877d54e9 LP |
1180 | |
1181 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1182 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1183 | SD_MESSAGE_UNIT_RELOADING; | |
1184 | ||
bbc9006e | 1185 | log_struct_unit(LOG_INFO, |
c1b6628d ZJS |
1186 | u->id, |
1187 | MESSAGE_ID(mid), | |
1188 | "MESSAGE=%s", buf, | |
1189 | NULL); | |
877d54e9 | 1190 | } |
877d54e9 | 1191 | |
87f0e418 | 1192 | /* Errors: |
d5159713 LP |
1193 | * -EBADR: This unit type does not support starting. |
1194 | * -EALREADY: Unit is already started. | |
1195 | * -EAGAIN: An operation is already in progress. Retry later. | |
1196 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
1197 | */ |
1198 | int unit_start(Unit *u) { | |
1199 | UnitActiveState state; | |
92ab323c | 1200 | Unit *following; |
87f0e418 LP |
1201 | |
1202 | assert(u); | |
1203 | ||
ac155bb8 | 1204 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1205 | return -EINVAL; |
1206 | ||
a82e5507 LP |
1207 | /* If this is already started, then this will succeed. Note |
1208 | * that this will even succeed if this unit is not startable | |
1209 | * by the user. This is relied on to detect when we need to | |
1210 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1211 | state = unit_active_state(u); |
1212 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1213 | return -EALREADY; | |
1214 | ||
a82e5507 LP |
1215 | /* If the conditions failed, don't do anything at all. If we |
1216 | * already are activating this call might still be useful to | |
1217 | * speed up activation in case there is some hold-off time, | |
1218 | * but we don't want to recheck the condition in that case. */ | |
1219 | if (state != UNIT_ACTIVATING && | |
1220 | !unit_condition_test(u)) { | |
c1b6628d | 1221 | log_debug_unit(u->id, "Starting of %s requested but condition failed. Ignoring.", u->id); |
52661efd LP |
1222 | return -EALREADY; |
1223 | } | |
1224 | ||
92ab323c | 1225 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1226 | following = unit_following(u); |
1227 | if (following) { | |
c1b6628d ZJS |
1228 | log_debug_unit(u->id, "Redirecting start request from %s to %s.", |
1229 | u->id, following->id); | |
92ab323c LP |
1230 | return unit_start(following); |
1231 | } | |
1232 | ||
877d54e9 LP |
1233 | unit_status_log_starting_stopping_reloading(u, JOB_START); |
1234 | unit_status_print_starting_stopping(u, JOB_START); | |
c6918296 | 1235 | |
92ab323c LP |
1236 | /* If it is stopped, but we cannot start it, then fail */ |
1237 | if (!UNIT_VTABLE(u)->start) | |
1238 | return -EBADR; | |
1239 | ||
87f0e418 LP |
1240 | /* We don't suppress calls to ->start() here when we are |
1241 | * already starting, to allow this request to be used as a | |
1242 | * "hurry up" call, for example when the unit is in some "auto | |
1243 | * restart" state where it waits for a holdoff timer to elapse | |
1244 | * before it will start again. */ | |
1245 | ||
c1e1601e | 1246 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1247 | |
87f0e418 LP |
1248 | return UNIT_VTABLE(u)->start(u); |
1249 | } | |
1250 | ||
1251 | bool unit_can_start(Unit *u) { | |
1252 | assert(u); | |
1253 | ||
1254 | return !!UNIT_VTABLE(u)->start; | |
1255 | } | |
1256 | ||
2528a7a6 LP |
1257 | bool unit_can_isolate(Unit *u) { |
1258 | assert(u); | |
1259 | ||
1260 | return unit_can_start(u) && | |
ac155bb8 | 1261 | u->allow_isolate; |
2528a7a6 LP |
1262 | } |
1263 | ||
87f0e418 LP |
1264 | /* Errors: |
1265 | * -EBADR: This unit type does not support stopping. | |
1266 | * -EALREADY: Unit is already stopped. | |
1267 | * -EAGAIN: An operation is already in progress. Retry later. | |
1268 | */ | |
1269 | int unit_stop(Unit *u) { | |
1270 | UnitActiveState state; | |
92ab323c | 1271 | Unit *following; |
87f0e418 LP |
1272 | |
1273 | assert(u); | |
1274 | ||
87f0e418 | 1275 | state = unit_active_state(u); |
fdf20a31 | 1276 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1277 | return -EALREADY; |
1278 | ||
92ab323c | 1279 | if ((following = unit_following(u))) { |
c1b6628d ZJS |
1280 | log_debug_unit(u->id, "Redirecting stop request from %s to %s.", |
1281 | u->id, following->id); | |
92ab323c LP |
1282 | return unit_stop(following); |
1283 | } | |
1284 | ||
877d54e9 LP |
1285 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); |
1286 | unit_status_print_starting_stopping(u, JOB_STOP); | |
c6918296 | 1287 | |
7898b0cf LP |
1288 | if (!UNIT_VTABLE(u)->stop) |
1289 | return -EBADR; | |
1290 | ||
c1e1601e | 1291 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1292 | |
87f0e418 LP |
1293 | return UNIT_VTABLE(u)->stop(u); |
1294 | } | |
1295 | ||
1296 | /* Errors: | |
1297 | * -EBADR: This unit type does not support reloading. | |
1298 | * -ENOEXEC: Unit is not started. | |
1299 | * -EAGAIN: An operation is already in progress. Retry later. | |
1300 | */ | |
1301 | int unit_reload(Unit *u) { | |
1302 | UnitActiveState state; | |
92ab323c | 1303 | Unit *following; |
87f0e418 LP |
1304 | |
1305 | assert(u); | |
1306 | ||
ac155bb8 | 1307 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1308 | return -EINVAL; |
1309 | ||
87f0e418 LP |
1310 | if (!unit_can_reload(u)) |
1311 | return -EBADR; | |
1312 | ||
1313 | state = unit_active_state(u); | |
e364ad06 | 1314 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1315 | return -EALREADY; |
1316 | ||
6a371e23 ZJS |
1317 | if (state != UNIT_ACTIVE) { |
1318 | log_warning_unit(u->id, "Unit %s cannot be reloaded because it is inactive.", | |
1319 | u->id); | |
87f0e418 | 1320 | return -ENOEXEC; |
6a371e23 | 1321 | } |
87f0e418 | 1322 | |
e48614c4 ZJS |
1323 | following = unit_following(u); |
1324 | if (following) { | |
c1b6628d ZJS |
1325 | log_debug_unit(u->id, "Redirecting reload request from %s to %s.", |
1326 | u->id, following->id); | |
92ab323c LP |
1327 | return unit_reload(following); |
1328 | } | |
1329 | ||
877d54e9 LP |
1330 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); |
1331 | ||
c1e1601e | 1332 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1333 | return UNIT_VTABLE(u)->reload(u); |
1334 | } | |
1335 | ||
1336 | bool unit_can_reload(Unit *u) { | |
1337 | assert(u); | |
1338 | ||
1339 | if (!UNIT_VTABLE(u)->reload) | |
1340 | return false; | |
1341 | ||
1342 | if (!UNIT_VTABLE(u)->can_reload) | |
1343 | return true; | |
1344 | ||
1345 | return UNIT_VTABLE(u)->can_reload(u); | |
1346 | } | |
1347 | ||
b4a16b7b | 1348 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1349 | Iterator i; |
1350 | Unit *other; | |
1351 | ||
1352 | assert(u); | |
1353 | ||
1354 | /* If this service shall be shut down when unneeded then do | |
1355 | * so. */ | |
1356 | ||
ac155bb8 | 1357 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1358 | return; |
1359 | ||
1360 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1361 | return; | |
1362 | ||
ac155bb8 | 1363 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
31afa0a4 | 1364 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1365 | return; |
1366 | ||
ac155bb8 | 1367 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
31afa0a4 | 1368 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1369 | return; |
1370 | ||
ac155bb8 | 1371 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
31afa0a4 | 1372 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1373 | return; |
1374 | ||
ac155bb8 | 1375 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
31afa0a4 | 1376 | if (unit_active_or_pending(other)) |
b81884e7 LP |
1377 | return; |
1378 | ||
c1b6628d | 1379 | log_info_unit(u->id, "Service %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1380 | |
1381 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1382 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1383 | } |
1384 | ||
87f0e418 LP |
1385 | static void retroactively_start_dependencies(Unit *u) { |
1386 | Iterator i; | |
1387 | Unit *other; | |
1388 | ||
1389 | assert(u); | |
1390 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1391 | ||
ac155bb8 MS |
1392 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1393 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1394 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1395 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1396 | |
7f2cddae | 1397 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1398 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1399 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1400 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1401 | |
ac155bb8 MS |
1402 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1403 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1404 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1405 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1406 | |
ac155bb8 MS |
1407 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1408 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1409 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1410 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1411 | |
ac155bb8 | 1412 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1413 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1414 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1415 | |
ac155bb8 | 1416 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1417 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1418 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1419 | } |
1420 | ||
1421 | static void retroactively_stop_dependencies(Unit *u) { | |
1422 | Iterator i; | |
1423 | Unit *other; | |
1424 | ||
1425 | assert(u); | |
1426 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1427 | ||
b81884e7 | 1428 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1429 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1430 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1431 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1432 | } |
1433 | ||
1434 | static void check_unneeded_dependencies(Unit *u) { | |
1435 | Iterator i; | |
1436 | Unit *other; | |
1437 | ||
1438 | assert(u); | |
1439 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1440 | |
1441 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1442 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1443 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1444 | unit_check_unneeded(other); |
ac155bb8 | 1445 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1446 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1447 | unit_check_unneeded(other); |
ac155bb8 | 1448 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1449 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1450 | unit_check_unneeded(other); |
ac155bb8 | 1451 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1452 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1453 | unit_check_unneeded(other); |
ac155bb8 | 1454 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1455 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1456 | unit_check_unneeded(other); |
7f2cddae | 1457 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1458 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1459 | unit_check_unneeded(other); | |
87f0e418 LP |
1460 | } |
1461 | ||
3ecaa09b | 1462 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1463 | Unit *other; |
1464 | Iterator i; | |
1465 | ||
1466 | assert(u); | |
1467 | ||
ac155bb8 | 1468 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1469 | return; |
1470 | ||
c1b6628d | 1471 | log_info_unit(u->id, "Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1472 | |
ac155bb8 | 1473 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1474 | int r; |
1475 | ||
d420282b | 1476 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d ZJS |
1477 | if (r < 0) |
1478 | log_error_unit(u->id, "Failed to enqueue OnFailure= job: %s", strerror(-r)); | |
222ae6a8 | 1479 | } |
c0daa706 LP |
1480 | } |
1481 | ||
3ecaa09b LP |
1482 | void unit_trigger_notify(Unit *u) { |
1483 | Unit *other; | |
1484 | Iterator i; | |
1485 | ||
1486 | assert(u); | |
1487 | ||
1488 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1489 | if (UNIT_VTABLE(other)->trigger_notify) | |
1490 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1491 | } | |
1492 | ||
e2f3b44c | 1493 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1494 | Manager *m; |
7e6e7b06 | 1495 | bool unexpected; |
a096ed36 | 1496 | |
87f0e418 LP |
1497 | assert(u); |
1498 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1499 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1500 | |
8e471ccd LP |
1501 | /* Note that this is called for all low-level state changes, |
1502 | * even if they might map to the same high-level | |
1503 | * UnitActiveState! That means that ns == os is OK an expected | |
c5315881 | 1504 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1505 | * this function will be called too! */ |
87f0e418 | 1506 | |
546ac4f0 MS |
1507 | m = u->manager; |
1508 | ||
1509 | if (m->n_reloading <= 0) { | |
bdbf9951 | 1510 | dual_timestamp ts; |
173e3821 | 1511 | |
bdbf9951 | 1512 | dual_timestamp_get(&ts); |
173e3821 | 1513 | |
bdbf9951 | 1514 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1515 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1516 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1517 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1518 | |
1519 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1520 | u->active_enter_timestamp = ts; |
bdbf9951 | 1521 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1522 | u->active_exit_timestamp = ts; |
bdbf9951 | 1523 | } |
87f0e418 | 1524 | |
fdf20a31 | 1525 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
4ad49000 | 1526 | unit_destroy_cgroup(u); |
fb385181 | 1527 | |
9cd86184 OB |
1528 | /* Note that this doesn't apply to RemainAfterExit services exiting |
1529 | * sucessfully, since there's no change of state in that case. Which is | |
1530 | * why it is handled in service_set_state() */ | |
7ed9f6cd | 1531 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1532 | ExecContext *ec; |
1533 | ||
1534 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1535 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1536 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1537 | m->n_on_console --; | |
1538 | ||
1539 | if (m->n_on_console == 0) | |
1540 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1541 | m->no_console_output = false; |
31a7eb86 ZJS |
1542 | } else |
1543 | m->n_on_console ++; | |
7ed9f6cd MS |
1544 | } |
1545 | } | |
1546 | ||
ac155bb8 | 1547 | if (u->job) { |
7e6e7b06 | 1548 | unexpected = false; |
87f0e418 | 1549 | |
ac155bb8 | 1550 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1551 | |
1552 | /* So we reached a different state for this | |
1553 | * job. Let's see if we can run it now if it | |
1554 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1555 | job_add_to_run_queue(u->job); |
87f0e418 | 1556 | |
b410e6b9 | 1557 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1558 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1559 | * hence needs to invalidate jobs. */ |
87f0e418 | 1560 | |
ac155bb8 | 1561 | switch (u->job->type) { |
87f0e418 | 1562 | |
b410e6b9 LP |
1563 | case JOB_START: |
1564 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1565 | |
b410e6b9 | 1566 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1567 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1568 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1569 | unexpected = true; |
41b02ec7 | 1570 | |
fdf20a31 | 1571 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1572 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1573 | } |
87f0e418 | 1574 | |
b410e6b9 | 1575 | break; |
87f0e418 | 1576 | |
b410e6b9 LP |
1577 | case JOB_RELOAD: |
1578 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1579 | |
ac155bb8 | 1580 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1581 | if (ns == UNIT_ACTIVE) |
5273510e | 1582 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1583 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1584 | unexpected = true; |
41b02ec7 | 1585 | |
fdf20a31 | 1586 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1587 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1588 | } |
b410e6b9 | 1589 | } |
87f0e418 | 1590 | |
b410e6b9 | 1591 | break; |
87f0e418 | 1592 | |
b410e6b9 LP |
1593 | case JOB_STOP: |
1594 | case JOB_RESTART: | |
1595 | case JOB_TRY_RESTART: | |
87f0e418 | 1596 | |
fdf20a31 | 1597 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1598 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1599 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1600 | unexpected = true; |
5273510e | 1601 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1602 | } |
87f0e418 | 1603 | |
b410e6b9 | 1604 | break; |
87f0e418 | 1605 | |
b410e6b9 LP |
1606 | default: |
1607 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1608 | } |
87f0e418 | 1609 | |
7e6e7b06 LP |
1610 | } else |
1611 | unexpected = true; | |
1612 | ||
546ac4f0 | 1613 | if (m->n_reloading <= 0) { |
f3bff0eb | 1614 | |
bdbf9951 LP |
1615 | /* If this state change happened without being |
1616 | * requested by a job, then let's retroactively start | |
1617 | * or stop dependencies. We skip that step when | |
1618 | * deserializing, since we don't want to create any | |
1619 | * additional jobs just because something is already | |
1620 | * activated. */ | |
1621 | ||
1622 | if (unexpected) { | |
1623 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1624 | retroactively_start_dependencies(u); | |
1625 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1626 | retroactively_stop_dependencies(u); | |
1627 | } | |
5de9682c | 1628 | |
cd0504d0 | 1629 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1630 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1631 | check_unneeded_dependencies(u); |
1632 | ||
bdbf9951 | 1633 | if (ns != os && ns == UNIT_FAILED) { |
b33918c2 | 1634 | log_notice_unit(u->id, "Unit %s entered failed state.", u->id); |
3ecaa09b | 1635 | unit_start_on_failure(u); |
cd6d0a45 | 1636 | } |
3b2775c5 | 1637 | } |
e537352b | 1638 | |
3b2775c5 LP |
1639 | /* Some names are special */ |
1640 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1641 | ||
1642 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1643 | /* The bus just might have become available, | |
1644 | * hence try to connect to it, if we aren't | |
1645 | * yet connected. */ | |
546ac4f0 | 1646 | bus_init(m, true); |
3b2775c5 | 1647 | |
ac155bb8 | 1648 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1649 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1650 | m->n_reloading <= 0) { |
3b2775c5 | 1651 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1652 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1653 | u->in_audit = true; |
3b2775c5 | 1654 | } |
e983b760 | 1655 | |
3b2775c5 | 1656 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1657 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1658 | |
3b2775c5 | 1659 | } else { |
bdbf9951 | 1660 | |
3b2775c5 LP |
1661 | /* We don't care about D-Bus here, since we'll get an |
1662 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1663 | |
ac155bb8 | 1664 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1665 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1666 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1667 | m->n_reloading <= 0) { |
4927fcae | 1668 | |
3b2775c5 LP |
1669 | /* Hmm, if there was no start record written |
1670 | * write it now, so that we always have a nice | |
1671 | * pair */ | |
ac155bb8 | 1672 | if (!u->in_audit) { |
546ac4f0 | 1673 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1674 | |
3b2775c5 | 1675 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1676 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1677 | } else |
1678 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1679 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1680 | |
ac155bb8 | 1681 | u->in_audit = false; |
cd6d0a45 | 1682 | } |
f278026d LP |
1683 | } |
1684 | ||
546ac4f0 | 1685 | manager_recheck_journal(m); |
3ecaa09b | 1686 | unit_trigger_notify(u); |
3b2775c5 | 1687 | |
f3bff0eb LP |
1688 | /* Maybe we finished startup and are now ready for being |
1689 | * stopped because unneeded? */ | |
bf6dcfa6 OS |
1690 | if (u->manager->n_reloading <= 0) |
1691 | unit_check_unneeded(u); | |
c1e1601e LP |
1692 | |
1693 | unit_add_to_dbus_queue(u); | |
701cc384 | 1694 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1695 | } |
1696 | ||
87f0e418 | 1697 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
1698 | int q, r; |
1699 | ||
87f0e418 LP |
1700 | assert(u); |
1701 | assert(pid >= 1); | |
1702 | ||
5ba6985b LP |
1703 | /* Watch a specific PID. We only support one or two units |
1704 | * watching each PID for now, not more. */ | |
1705 | ||
1706 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, trivial_hash_func, trivial_compare_func); | |
1707 | if (r < 0) | |
1708 | return r; | |
1709 | ||
a911bb9a LP |
1710 | r = set_ensure_allocated(&u->pids, trivial_hash_func, trivial_compare_func); |
1711 | if (r < 0) | |
1712 | return r; | |
1713 | ||
5ba6985b LP |
1714 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
1715 | if (r == -EEXIST) { | |
1716 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, trivial_hash_func, trivial_compare_func); | |
1717 | if (r < 0) | |
1718 | return r; | |
05e343b7 | 1719 | |
5ba6985b LP |
1720 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
1721 | } | |
a911bb9a | 1722 | |
5ba6985b | 1723 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
a911bb9a LP |
1724 | if (q < 0) |
1725 | return q; | |
1726 | ||
1727 | return r; | |
87f0e418 LP |
1728 | } |
1729 | ||
1730 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1731 | assert(u); | |
1732 | assert(pid >= 1); | |
1733 | ||
5ba6985b LP |
1734 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
1735 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
a911bb9a LP |
1736 | set_remove(u->pids, LONG_TO_PTR(pid)); |
1737 | } | |
1738 | ||
1739 | static int watch_pids_in_path(Unit *u, const char *path) { | |
1740 | _cleanup_closedir_ DIR *d = NULL; | |
1741 | _cleanup_fclose_ FILE *f = NULL; | |
1742 | int ret = 0, r; | |
1743 | ||
1744 | assert(u); | |
1745 | assert(path); | |
1746 | ||
1747 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ | |
1748 | ||
1749 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
1750 | if (r >= 0) { | |
1751 | pid_t pid; | |
1752 | ||
1753 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
1754 | r = unit_watch_pid(u, pid); | |
1755 | if (r < 0 && ret >= 0) | |
1756 | ret = r; | |
1757 | } | |
1758 | if (r < 0 && ret >= 0) | |
1759 | ret = r; | |
1760 | ||
1761 | } else if (ret >= 0) | |
1762 | ret = r; | |
1763 | ||
1764 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
1765 | if (r >= 0) { | |
1766 | char *fn; | |
1767 | ||
1768 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
1769 | _cleanup_free_ char *p = NULL; | |
1770 | ||
1771 | p = strjoin(path, "/", fn, NULL); | |
1772 | free(fn); | |
1773 | ||
1774 | if (!p) | |
1775 | return -ENOMEM; | |
1776 | ||
1777 | r = watch_pids_in_path(u, p); | |
1778 | if (r < 0 && ret >= 0) | |
1779 | ret = r; | |
1780 | } | |
1781 | if (r < 0 && ret >= 0) | |
1782 | ret = r; | |
1783 | ||
1784 | } else if (ret >= 0) | |
1785 | ret = r; | |
1786 | ||
1787 | return ret; | |
1788 | } | |
1789 | ||
1790 | ||
1791 | int unit_watch_all_pids(Unit *u) { | |
1792 | assert(u); | |
1793 | ||
1794 | if (!u->cgroup_path) | |
1795 | return -ENOENT; | |
1796 | ||
1797 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ | |
1798 | ||
1799 | return watch_pids_in_path(u, u->cgroup_path); | |
1800 | } | |
1801 | ||
1802 | void unit_unwatch_all_pids(Unit *u) { | |
1803 | Iterator i; | |
1804 | void *e; | |
1805 | ||
1806 | assert(u); | |
1807 | ||
5ba6985b LP |
1808 | SET_FOREACH(e, u->pids, i) { |
1809 | hashmap_remove_value(u->manager->watch_pids1, e, u); | |
1810 | hashmap_remove_value(u->manager->watch_pids2, e, u); | |
1811 | } | |
a911bb9a LP |
1812 | |
1813 | set_free(u->pids); | |
1814 | u->pids = NULL; | |
1815 | } | |
1816 | ||
1817 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
1818 | Iterator i; | |
1819 | void *e; | |
1820 | ||
1821 | assert(u); | |
1822 | ||
1823 | /* Cleans dead PIDs from our list */ | |
1824 | ||
1825 | SET_FOREACH(e, u->pids, i) { | |
1826 | pid_t pid = PTR_TO_LONG(e); | |
1827 | ||
1828 | if (pid == except1 || pid == except2) | |
1829 | continue; | |
1830 | ||
9f5650ae | 1831 | if (!pid_is_unwaited(pid)) |
a911bb9a LP |
1832 | set_remove(u->pids, e); |
1833 | } | |
87f0e418 LP |
1834 | } |
1835 | ||
87f0e418 LP |
1836 | bool unit_job_is_applicable(Unit *u, JobType j) { |
1837 | assert(u); | |
1838 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1839 | ||
1840 | switch (j) { | |
1841 | ||
1842 | case JOB_VERIFY_ACTIVE: | |
1843 | case JOB_START: | |
57339f47 | 1844 | case JOB_STOP: |
e0209d83 | 1845 | case JOB_NOP: |
87f0e418 LP |
1846 | return true; |
1847 | ||
87f0e418 LP |
1848 | case JOB_RESTART: |
1849 | case JOB_TRY_RESTART: | |
1850 | return unit_can_start(u); | |
1851 | ||
1852 | case JOB_RELOAD: | |
1853 | return unit_can_reload(u); | |
1854 | ||
1855 | case JOB_RELOAD_OR_START: | |
1856 | return unit_can_reload(u) && unit_can_start(u); | |
1857 | ||
1858 | default: | |
1859 | assert_not_reached("Invalid job type"); | |
1860 | } | |
1861 | } | |
1862 | ||
701cc384 | 1863 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1864 | |
1865 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1866 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1867 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1868 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1869 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1870 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 1871 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 1872 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 1873 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1874 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1875 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 1876 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 1877 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
1878 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1879 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1880 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1881 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1882 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 1883 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
1884 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
1885 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 1886 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 1887 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 1888 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 1889 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 1890 | }; |
701cc384 | 1891 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1892 | |
1893 | assert(u); | |
1894 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1895 | assert(other); |
1896 | ||
9f151f29 LP |
1897 | u = unit_follow_merge(u); |
1898 | other = unit_follow_merge(other); | |
1899 | ||
87f0e418 LP |
1900 | /* We won't allow dependencies on ourselves. We will not |
1901 | * consider them an error however. */ | |
1902 | if (u == other) | |
1903 | return 0; | |
1904 | ||
613b411c LP |
1905 | r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func); |
1906 | if (r < 0) | |
87f0e418 LP |
1907 | return r; |
1908 | ||
613b411c LP |
1909 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
1910 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func); | |
1911 | if (r < 0) | |
1912 | return r; | |
1913 | } | |
1914 | ||
1915 | if (add_reference) { | |
1916 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func); | |
1917 | if (r < 0) | |
5de9682c LP |
1918 | return r; |
1919 | ||
613b411c LP |
1920 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func); |
1921 | if (r < 0) | |
701cc384 | 1922 | return r; |
613b411c | 1923 | } |
87f0e418 | 1924 | |
613b411c LP |
1925 | q = set_put(u->dependencies[d], other); |
1926 | if (q < 0) | |
701cc384 | 1927 | return q; |
87f0e418 | 1928 | |
613b411c LP |
1929 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
1930 | v = set_put(other->dependencies[inverse_table[d]], u); | |
1931 | if (v < 0) { | |
5de9682c LP |
1932 | r = v; |
1933 | goto fail; | |
1934 | } | |
613b411c | 1935 | } |
701cc384 LP |
1936 | |
1937 | if (add_reference) { | |
613b411c LP |
1938 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
1939 | if (w < 0) { | |
701cc384 LP |
1940 | r = w; |
1941 | goto fail; | |
1942 | } | |
1943 | ||
613b411c LP |
1944 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
1945 | if (r < 0) | |
701cc384 | 1946 | goto fail; |
87f0e418 LP |
1947 | } |
1948 | ||
c1e1601e | 1949 | unit_add_to_dbus_queue(u); |
87f0e418 | 1950 | return 0; |
701cc384 LP |
1951 | |
1952 | fail: | |
1953 | if (q > 0) | |
ac155bb8 | 1954 | set_remove(u->dependencies[d], other); |
701cc384 LP |
1955 | |
1956 | if (v > 0) | |
ac155bb8 | 1957 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
1958 | |
1959 | if (w > 0) | |
ac155bb8 | 1960 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
1961 | |
1962 | return r; | |
87f0e418 | 1963 | } |
0301abf4 | 1964 | |
2c966c03 LP |
1965 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1966 | int r; | |
1967 | ||
1968 | assert(u); | |
1969 | ||
1970 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1971 | return r; | |
1972 | ||
1973 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1974 | return r; | |
1975 | ||
1976 | return 0; | |
1977 | } | |
1978 | ||
9e2f7c11 LP |
1979 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1980 | char *s; | |
1981 | ||
1982 | assert(u); | |
1983 | assert(name || path); | |
8afbb8e1 | 1984 | assert(p); |
9e2f7c11 LP |
1985 | |
1986 | if (!name) | |
2b6bf07d | 1987 | name = basename(path); |
9e2f7c11 LP |
1988 | |
1989 | if (!unit_name_is_template(name)) { | |
1990 | *p = NULL; | |
1991 | return name; | |
1992 | } | |
1993 | ||
ac155bb8 MS |
1994 | if (u->instance) |
1995 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 | 1996 | else { |
ae018d9b | 1997 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 1998 | |
8afbb8e1 LP |
1999 | i = unit_name_to_prefix(u->id); |
2000 | if (!i) | |
9e2f7c11 LP |
2001 | return NULL; |
2002 | ||
2003 | s = unit_name_replace_instance(name, i); | |
9e2f7c11 LP |
2004 | } |
2005 | ||
2006 | if (!s) | |
2007 | return NULL; | |
2008 | ||
2009 | *p = s; | |
2010 | return s; | |
2011 | } | |
2012 | ||
701cc384 | 2013 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
2014 | Unit *other; |
2015 | int r; | |
8afbb8e1 | 2016 | _cleanup_free_ char *s = NULL; |
09b6b09f | 2017 | |
9e2f7c11 LP |
2018 | assert(u); |
2019 | assert(name || path); | |
09b6b09f | 2020 | |
8afbb8e1 LP |
2021 | name = resolve_template(u, name, path, &s); |
2022 | if (!name) | |
9e2f7c11 | 2023 | return -ENOMEM; |
09b6b09f | 2024 | |
8afbb8e1 LP |
2025 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2026 | if (r < 0) | |
2027 | return r; | |
9e2f7c11 | 2028 | |
8afbb8e1 | 2029 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2030 | } |
2031 | ||
2c966c03 LP |
2032 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2033 | Unit *other; | |
2034 | int r; | |
68eda4bd | 2035 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2036 | |
2037 | assert(u); | |
2038 | assert(name || path); | |
2039 | ||
2040 | if (!(name = resolve_template(u, name, path, &s))) | |
2041 | return -ENOMEM; | |
2042 | ||
ac155bb8 | 2043 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
68eda4bd | 2044 | return r; |
2c966c03 LP |
2045 | |
2046 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
2047 | ||
2c966c03 LP |
2048 | return r; |
2049 | } | |
2050 | ||
701cc384 | 2051 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
2052 | Unit *other; |
2053 | int r; | |
68eda4bd | 2054 | _cleanup_free_ char *s = NULL; |
bd77d0fc | 2055 | |
9e2f7c11 LP |
2056 | assert(u); |
2057 | assert(name || path); | |
bd77d0fc | 2058 | |
9e2f7c11 LP |
2059 | if (!(name = resolve_template(u, name, path, &s))) |
2060 | return -ENOMEM; | |
bd77d0fc | 2061 | |
ac155bb8 | 2062 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
68eda4bd | 2063 | return r; |
9e2f7c11 | 2064 | |
701cc384 | 2065 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 | 2066 | |
9e2f7c11 | 2067 | return r; |
bd77d0fc LP |
2068 | } |
2069 | ||
2c966c03 LP |
2070 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2071 | Unit *other; | |
2072 | int r; | |
68eda4bd | 2073 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2074 | |
2075 | assert(u); | |
2076 | assert(name || path); | |
2077 | ||
2078 | if (!(name = resolve_template(u, name, path, &s))) | |
2079 | return -ENOMEM; | |
2080 | ||
ac155bb8 | 2081 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
68eda4bd | 2082 | return r; |
2c966c03 LP |
2083 | |
2084 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
68eda4bd | 2085 | return r; |
2c966c03 | 2086 | |
2c966c03 LP |
2087 | return r; |
2088 | } | |
2089 | ||
0301abf4 | 2090 | int set_unit_path(const char *p) { |
26d04f86 | 2091 | _cleanup_free_ char *c = NULL; |
0301abf4 LP |
2092 | |
2093 | /* This is mostly for debug purposes */ | |
26d04f86 LP |
2094 | c = path_make_absolute_cwd(p); |
2095 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) | |
2096 | return -errno; | |
0301abf4 LP |
2097 | |
2098 | return 0; | |
2099 | } | |
88066b3a | 2100 | |
ea430986 | 2101 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2102 | assert(u); |
2103 | ||
ac155bb8 | 2104 | if (!u->id) |
04ade7d2 LP |
2105 | return NULL; |
2106 | ||
48899192 | 2107 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2108 | } |
2109 | ||
41f9172f | 2110 | char *unit_default_cgroup_path(Unit *u) { |
d7bd3de0 | 2111 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
a016b922 | 2112 | int r; |
5954c074 | 2113 | |
013b87c0 LP |
2114 | assert(u); |
2115 | ||
4ad49000 LP |
2116 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2117 | return strdup(u->manager->cgroup_root); | |
2118 | ||
2119 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2120 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2121 | if (r < 0) | |
2122 | return NULL; | |
2123 | } | |
2124 | ||
d7bd3de0 LP |
2125 | escaped = cg_escape(u->id); |
2126 | if (!escaped) | |
5954c074 LP |
2127 | return NULL; |
2128 | ||
d7bd3de0 LP |
2129 | if (slice) |
2130 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2131 | else | |
2132 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
013b87c0 LP |
2133 | } |
2134 | ||
a016b922 | 2135 | int unit_add_default_slice(Unit *u) { |
a8833944 LP |
2136 | _cleanup_free_ char *b = NULL; |
2137 | const char *slice_name; | |
a016b922 LP |
2138 | Unit *slice; |
2139 | int r; | |
2140 | ||
2141 | assert(u); | |
2142 | ||
9444b1f2 | 2143 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2144 | return 0; |
2145 | ||
4ad49000 | 2146 | if (!unit_get_cgroup_context(u)) |
a016b922 LP |
2147 | return 0; |
2148 | ||
a8833944 LP |
2149 | if (u->instance) { |
2150 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2151 | |
a8833944 LP |
2152 | /* Implicitly place all instantiated units in their |
2153 | * own per-template slice */ | |
2154 | ||
2155 | prefix = unit_name_to_prefix(u->id); | |
2156 | if (!prefix) | |
2157 | return -ENOMEM; | |
2158 | ||
2159 | /* The prefix is already escaped, but it might include | |
2160 | * "-" which has a special meaning for slice units, | |
2161 | * hence escape it here extra. */ | |
2162 | escaped = strreplace(prefix, "-", "\\x2d"); | |
2163 | if (!escaped) | |
2164 | return -ENOMEM; | |
2165 | ||
2166 | if (u->manager->running_as == SYSTEMD_SYSTEM) | |
2167 | b = strjoin("system-", escaped, ".slice", NULL); | |
2168 | else | |
2169 | b = strappend(escaped, ".slice"); | |
2170 | if (!b) | |
2171 | return -ENOMEM; | |
2172 | ||
2173 | slice_name = b; | |
2174 | } else | |
2175 | slice_name = | |
2176 | u->manager->running_as == SYSTEMD_SYSTEM | |
2177 | ? SPECIAL_SYSTEM_SLICE | |
2178 | : SPECIAL_ROOT_SLICE; | |
2179 | ||
2180 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2181 | if (r < 0) |
2182 | return r; | |
2183 | ||
2184 | unit_ref_set(&u->slice, slice); | |
2185 | return 0; | |
2186 | } | |
2187 | ||
9444b1f2 LP |
2188 | const char *unit_slice_name(Unit *u) { |
2189 | assert(u); | |
2190 | ||
2191 | if (!UNIT_ISSET(u->slice)) | |
2192 | return NULL; | |
2193 | ||
2194 | return UNIT_DEREF(u->slice)->id; | |
2195 | } | |
2196 | ||
f6ff8c29 | 2197 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2198 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2199 | int r; |
2200 | ||
2201 | assert(u); | |
2202 | assert(type); | |
2203 | assert(_found); | |
2204 | ||
78edb35a LP |
2205 | t = unit_name_change_suffix(u->id, type); |
2206 | if (!t) | |
f6ff8c29 LP |
2207 | return -ENOMEM; |
2208 | ||
2209 | assert(!unit_has_name(u, t)); | |
2210 | ||
ac155bb8 | 2211 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2212 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2213 | return r; |
2214 | } | |
2215 | ||
05e343b7 LP |
2216 | int unit_watch_bus_name(Unit *u, const char *name) { |
2217 | assert(u); | |
2218 | assert(name); | |
2219 | ||
2220 | /* Watch a specific name on the bus. We only support one unit | |
2221 | * watching each name for now. */ | |
2222 | ||
ac155bb8 | 2223 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2224 | } |
2225 | ||
2226 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2227 | assert(u); | |
2228 | assert(name); | |
2229 | ||
ac155bb8 | 2230 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2231 | } |
2232 | ||
a16e1123 LP |
2233 | bool unit_can_serialize(Unit *u) { |
2234 | assert(u); | |
2235 | ||
2236 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2237 | } | |
2238 | ||
6b78f9b4 | 2239 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
613b411c | 2240 | ExecRuntime *rt; |
a16e1123 LP |
2241 | int r; |
2242 | ||
2243 | assert(u); | |
2244 | assert(f); | |
2245 | assert(fds); | |
2246 | ||
2247 | if (!unit_can_serialize(u)) | |
2248 | return 0; | |
2249 | ||
6fa48533 LP |
2250 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
2251 | if (r < 0) | |
a16e1123 LP |
2252 | return r; |
2253 | ||
613b411c LP |
2254 | rt = unit_get_exec_runtime(u); |
2255 | if (rt) { | |
2256 | r = exec_runtime_serialize(rt, u, f, fds); | |
2257 | if (r < 0) | |
2258 | return r; | |
e0209d83 MS |
2259 | } |
2260 | ||
ac155bb8 MS |
2261 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2262 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2263 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2264 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2265 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
2791a8f8 | 2266 | |
ac155bb8 MS |
2267 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2268 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2269 | |
c2756a68 LP |
2270 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
2271 | ||
2272 | if (u->cgroup_path) | |
2273 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
2274 | ||
613b411c LP |
2275 | if (serialize_jobs) { |
2276 | if (u->job) { | |
2277 | fprintf(f, "job\n"); | |
2278 | job_serialize(u->job, f, fds); | |
2279 | } | |
2280 | ||
2281 | if (u->nop_job) { | |
2282 | fprintf(f, "job\n"); | |
2283 | job_serialize(u->nop_job, f, fds); | |
2284 | } | |
2285 | } | |
2286 | ||
a16e1123 LP |
2287 | /* End marker */ |
2288 | fputc('\n', f); | |
2289 | return 0; | |
2290 | } | |
2291 | ||
2292 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2293 | va_list ap; | |
2294 | ||
2295 | assert(u); | |
2296 | assert(f); | |
2297 | assert(key); | |
2298 | assert(format); | |
2299 | ||
2300 | fputs(key, f); | |
2301 | fputc('=', f); | |
2302 | ||
2303 | va_start(ap, format); | |
2304 | vfprintf(f, format, ap); | |
2305 | va_end(ap); | |
2306 | ||
2307 | fputc('\n', f); | |
2308 | } | |
2309 | ||
2310 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2311 | assert(u); | |
2312 | assert(f); | |
2313 | assert(key); | |
2314 | assert(value); | |
2315 | ||
2316 | fprintf(f, "%s=%s\n", key, value); | |
2317 | } | |
2318 | ||
2319 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
613b411c | 2320 | size_t offset; |
28b99ccd | 2321 | ExecRuntime **rt = NULL; |
a16e1123 LP |
2322 | int r; |
2323 | ||
2324 | assert(u); | |
2325 | assert(f); | |
2326 | assert(fds); | |
2327 | ||
2328 | if (!unit_can_serialize(u)) | |
2329 | return 0; | |
2330 | ||
613b411c LP |
2331 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2332 | if (offset > 0) | |
2333 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2334 | ||
a16e1123 | 2335 | for (;;) { |
20c03b7b | 2336 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2337 | size_t k; |
2338 | ||
2339 | if (!fgets(line, sizeof(line), f)) { | |
2340 | if (feof(f)) | |
2341 | return 0; | |
2342 | return -errno; | |
2343 | } | |
2344 | ||
10f8e83c | 2345 | char_array_0(line); |
a16e1123 LP |
2346 | l = strstrip(line); |
2347 | ||
2348 | /* End marker */ | |
2349 | if (l[0] == 0) | |
2350 | return 0; | |
2351 | ||
2352 | k = strcspn(l, "="); | |
2353 | ||
2354 | if (l[k] == '=') { | |
2355 | l[k] = 0; | |
2356 | v = l+k+1; | |
2357 | } else | |
2358 | v = l+k; | |
2359 | ||
cca098b0 | 2360 | if (streq(l, "job")) { |
39a18c60 MS |
2361 | if (v[0] == '\0') { |
2362 | /* new-style serialized job */ | |
2363 | Job *j = job_new_raw(u); | |
2364 | if (!j) | |
2365 | return -ENOMEM; | |
2366 | ||
2367 | r = job_deserialize(j, f, fds); | |
2368 | if (r < 0) { | |
2369 | job_free(j); | |
2370 | return r; | |
2371 | } | |
cca098b0 | 2372 | |
39a18c60 MS |
2373 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2374 | if (r < 0) { | |
2375 | job_free(j); | |
2376 | return r; | |
2377 | } | |
e0209d83 MS |
2378 | |
2379 | r = job_install_deserialized(j); | |
2380 | if (r < 0) { | |
2381 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2382 | job_free(j); | |
2383 | return r; | |
2384 | } | |
6b19ad24 MS |
2385 | |
2386 | if (j->state == JOB_RUNNING) | |
2387 | u->manager->n_running_jobs++; | |
39a18c60 MS |
2388 | } else { |
2389 | /* legacy */ | |
2390 | JobType type = job_type_from_string(v); | |
2391 | if (type < 0) | |
2392 | log_debug("Failed to parse job type value %s", v); | |
2393 | else | |
2394 | u->deserialized_job = type; | |
2395 | } | |
cca098b0 | 2396 | continue; |
8aaf019b | 2397 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2398 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2399 | continue; |
2400 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2401 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2402 | continue; |
2403 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2404 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2405 | continue; |
2406 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2407 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2408 | continue; |
2791a8f8 | 2409 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2410 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 LP |
2411 | continue; |
2412 | } else if (streq(l, "condition-result")) { | |
2413 | int b; | |
2414 | ||
c2756a68 LP |
2415 | b = parse_boolean(v); |
2416 | if (b < 0) | |
2791a8f8 LP |
2417 | log_debug("Failed to parse condition result value %s", v); |
2418 | else | |
ac155bb8 | 2419 | u->condition_result = b; |
efbac6d2 LP |
2420 | |
2421 | continue; | |
c2756a68 LP |
2422 | |
2423 | } else if (streq(l, "transient")) { | |
2424 | int b; | |
2425 | ||
2426 | b = parse_boolean(v); | |
2427 | if (b < 0) | |
2428 | log_debug("Failed to parse transient bool %s", v); | |
2429 | else | |
2430 | u->transient = b; | |
2431 | ||
2432 | continue; | |
2433 | } else if (streq(l, "cgroup")) { | |
2434 | char *s; | |
2435 | ||
2436 | s = strdup(v); | |
f440e1bb | 2437 | if (!s) |
c2756a68 LP |
2438 | return -ENOMEM; |
2439 | ||
2440 | free(u->cgroup_path); | |
2441 | u->cgroup_path = s; | |
72673e86 | 2442 | |
b58b8e11 | 2443 | assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1); |
c2756a68 | 2444 | continue; |
8aaf019b | 2445 | } |
cca098b0 | 2446 | |
613b411c LP |
2447 | if (rt) { |
2448 | r = exec_runtime_deserialize_item(rt, u, l, v, fds); | |
2449 | if (r < 0) | |
2450 | return r; | |
2451 | if (r > 0) | |
2452 | continue; | |
2453 | } | |
2454 | ||
c2756a68 LP |
2455 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
2456 | if (r < 0) | |
a16e1123 LP |
2457 | return r; |
2458 | } | |
2459 | } | |
2460 | ||
6e2ef85b LP |
2461 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2462 | Unit *device; | |
68eda4bd | 2463 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2464 | int r; |
2465 | ||
2466 | assert(u); | |
2467 | ||
2468 | if (!what) | |
2469 | return 0; | |
2470 | ||
2471 | /* Adds in links to the device node that this unit is based on */ | |
2472 | ||
8407a5d0 | 2473 | if (!is_device_path(what)) |
6e2ef85b LP |
2474 | return 0; |
2475 | ||
35eb6b12 LP |
2476 | e = unit_name_from_path(what, ".device"); |
2477 | if (!e) | |
6e2ef85b LP |
2478 | return -ENOMEM; |
2479 | ||
ac155bb8 | 2480 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
68eda4bd | 2481 | |
6e2ef85b LP |
2482 | if (r < 0) |
2483 | return r; | |
2484 | ||
faa368e3 LP |
2485 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true); |
2486 | if (r < 0) | |
6e2ef85b LP |
2487 | return r; |
2488 | ||
faa368e3 LP |
2489 | if (wants) { |
2490 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2491 | if (r < 0) | |
6e2ef85b | 2492 | return r; |
faa368e3 | 2493 | } |
6e2ef85b LP |
2494 | |
2495 | return 0; | |
2496 | } | |
a16e1123 | 2497 | |
cca098b0 LP |
2498 | int unit_coldplug(Unit *u) { |
2499 | int r; | |
2500 | ||
2501 | assert(u); | |
2502 | ||
2503 | if (UNIT_VTABLE(u)->coldplug) | |
2504 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2505 | return r; | |
2506 | ||
39a18c60 MS |
2507 | if (u->job) { |
2508 | r = job_coldplug(u->job); | |
2509 | if (r < 0) | |
2510 | return r; | |
2511 | } else if (u->deserialized_job >= 0) { | |
2512 | /* legacy */ | |
2513 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2514 | if (r < 0) | |
cca098b0 LP |
2515 | return r; |
2516 | ||
ac155bb8 | 2517 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2518 | } |
2519 | ||
2520 | return 0; | |
2521 | } | |
2522 | ||
49b1d377 | 2523 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2524 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 2525 | manager_status_printf(u->manager, false, status, unit_status_msg_format, unit_description(u)); |
bcfce235 | 2526 | REENABLE_WARNING; |
49b1d377 MS |
2527 | } |
2528 | ||
45fb0699 | 2529 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2530 | _cleanup_strv_free_ char **t = NULL; |
2531 | char **path; | |
1b64d026 | 2532 | struct stat st; |
ae7a7182 | 2533 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2534 | |
45fb0699 LP |
2535 | assert(u); |
2536 | ||
ac155bb8 | 2537 | if (u->fragment_path) { |
5f4b19f4 | 2538 | zero(st); |
ac155bb8 | 2539 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2540 | /* What, cannot access this anymore? */ |
2541 | return true; | |
45fb0699 | 2542 | |
ac155bb8 MS |
2543 | if (u->fragment_mtime > 0 && |
2544 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2545 | return true; |
2546 | } | |
2547 | ||
1b64d026 LP |
2548 | if (u->source_path) { |
2549 | zero(st); | |
2550 | if (stat(u->source_path, &st) < 0) | |
2551 | return true; | |
2552 | ||
2553 | if (u->source_mtime > 0 && | |
2554 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2555 | return true; | |
2556 | } | |
5f4b19f4 | 2557 | |
ae7a7182 OS |
2558 | t = unit_find_dropin_paths(u); |
2559 | loaded_cnt = strv_length(t); | |
2560 | current_cnt = strv_length(u->dropin_paths); | |
2561 | ||
2562 | if (loaded_cnt == current_cnt) { | |
2563 | if (loaded_cnt == 0) | |
2564 | return false; | |
2565 | ||
2566 | if (strv_overlap(u->dropin_paths, t)) { | |
2567 | STRV_FOREACH(path, u->dropin_paths) { | |
2568 | zero(st); | |
2569 | if (stat(*path, &st) < 0) | |
2570 | return true; | |
2571 | ||
2572 | if (u->dropin_mtime > 0 && | |
2573 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2574 | return true; | |
2575 | } | |
2576 | ||
2577 | return false; | |
2578 | } else | |
2579 | return true; | |
2580 | } else | |
2581 | return true; | |
45fb0699 LP |
2582 | } |
2583 | ||
fdf20a31 | 2584 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2585 | assert(u); |
2586 | ||
fdf20a31 MM |
2587 | if (UNIT_VTABLE(u)->reset_failed) |
2588 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2589 | } |
2590 | ||
a7f241db LP |
2591 | Unit *unit_following(Unit *u) { |
2592 | assert(u); | |
2593 | ||
2594 | if (UNIT_VTABLE(u)->following) | |
2595 | return UNIT_VTABLE(u)->following(u); | |
2596 | ||
2597 | return NULL; | |
2598 | } | |
2599 | ||
31afa0a4 | 2600 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2601 | assert(u); |
2602 | ||
31afa0a4 LP |
2603 | /* This call does check the current state of the unit. It's |
2604 | * hence useful to be called from state change calls of the | |
2605 | * unit itself, where the state isn't updated yet. This is | |
2606 | * different from unit_inactive_or_pending() which checks both | |
2607 | * the current state and for a queued job. */ | |
18ffdfda | 2608 | |
31afa0a4 LP |
2609 | return u->job && u->job->type == JOB_STOP; |
2610 | } | |
2611 | ||
2612 | bool unit_inactive_or_pending(Unit *u) { | |
2613 | assert(u); | |
2614 | ||
2615 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 2616 | |
d956ac29 LP |
2617 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
2618 | return true; | |
2619 | ||
31afa0a4 | 2620 | if (unit_stop_pending(u)) |
18ffdfda LP |
2621 | return true; |
2622 | ||
2623 | return false; | |
2624 | } | |
2625 | ||
31afa0a4 | 2626 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
2627 | assert(u); |
2628 | ||
f60c2665 | 2629 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2630 | |
2631 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2632 | return true; | |
2633 | ||
ac155bb8 MS |
2634 | if (u->job && |
2635 | (u->job->type == JOB_START || | |
2636 | u->job->type == JOB_RELOAD_OR_START || | |
2637 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2638 | return true; |
2639 | ||
2640 | return false; | |
2641 | } | |
2642 | ||
718db961 | 2643 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
2644 | assert(u); |
2645 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2646 | assert(signo > 0); |
2647 | assert(signo < _NSIG); | |
2648 | ||
8a0867d6 LP |
2649 | if (!UNIT_VTABLE(u)->kill) |
2650 | return -ENOTSUP; | |
2651 | ||
c74f17d9 | 2652 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2653 | } |
2654 | ||
82659fd7 LP |
2655 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
2656 | Set *pid_set; | |
2657 | int r; | |
2658 | ||
2659 | pid_set = set_new(trivial_hash_func, trivial_compare_func); | |
2660 | if (!pid_set) | |
2661 | return NULL; | |
2662 | ||
2663 | /* Exclude the main/control pids from being killed via the cgroup */ | |
2664 | if (main_pid > 0) { | |
2665 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
2666 | if (r < 0) | |
2667 | goto fail; | |
2668 | } | |
2669 | ||
2670 | if (control_pid > 0) { | |
2671 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
2672 | if (r < 0) | |
2673 | goto fail; | |
2674 | } | |
2675 | ||
2676 | return pid_set; | |
2677 | ||
2678 | fail: | |
2679 | set_free(pid_set); | |
2680 | return NULL; | |
2681 | } | |
2682 | ||
d91c34f2 LP |
2683 | int unit_kill_common( |
2684 | Unit *u, | |
2685 | KillWho who, | |
2686 | int signo, | |
2687 | pid_t main_pid, | |
2688 | pid_t control_pid, | |
718db961 | 2689 | sd_bus_error *error) { |
d91c34f2 | 2690 | |
814cc562 MS |
2691 | int r = 0; |
2692 | ||
2693 | if (who == KILL_MAIN && main_pid <= 0) { | |
2694 | if (main_pid < 0) | |
718db961 | 2695 | sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
814cc562 | 2696 | else |
718db961 | 2697 | sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
2698 | return -ESRCH; |
2699 | } | |
2700 | ||
2701 | if (who == KILL_CONTROL && control_pid <= 0) { | |
2702 | if (control_pid < 0) | |
718db961 | 2703 | sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
814cc562 | 2704 | else |
718db961 | 2705 | sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
2706 | return -ESRCH; |
2707 | } | |
2708 | ||
2709 | if (who == KILL_CONTROL || who == KILL_ALL) | |
2710 | if (control_pid > 0) | |
2711 | if (kill(control_pid, signo) < 0) | |
2712 | r = -errno; | |
2713 | ||
2714 | if (who == KILL_MAIN || who == KILL_ALL) | |
2715 | if (main_pid > 0) | |
2716 | if (kill(main_pid, signo) < 0) | |
2717 | r = -errno; | |
2718 | ||
4ad49000 | 2719 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
2720 | _cleanup_set_free_ Set *pid_set = NULL; |
2721 | int q; | |
2722 | ||
82659fd7 LP |
2723 | /* Exclude the main/control pids from being killed via the cgroup */ |
2724 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
2725 | if (!pid_set) |
2726 | return -ENOMEM; | |
2727 | ||
4ad49000 | 2728 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
2729 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
2730 | r = q; | |
2731 | } | |
2732 | ||
2733 | return r; | |
2734 | } | |
2735 | ||
6210e7fc LP |
2736 | int unit_following_set(Unit *u, Set **s) { |
2737 | assert(u); | |
2738 | assert(s); | |
2739 | ||
2740 | if (UNIT_VTABLE(u)->following_set) | |
2741 | return UNIT_VTABLE(u)->following_set(u, s); | |
2742 | ||
2743 | *s = NULL; | |
2744 | return 0; | |
2745 | } | |
2746 | ||
a4375746 LP |
2747 | UnitFileState unit_get_unit_file_state(Unit *u) { |
2748 | assert(u); | |
2749 | ||
ac155bb8 MS |
2750 | if (u->unit_file_state < 0 && u->fragment_path) |
2751 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 2752 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 2753 | NULL, basename(u->fragment_path)); |
a4375746 | 2754 | |
ac155bb8 | 2755 | return u->unit_file_state; |
a4375746 LP |
2756 | } |
2757 | ||
57020a3a LP |
2758 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
2759 | assert(ref); | |
2760 | assert(u); | |
2761 | ||
2762 | if (ref->unit) | |
2763 | unit_ref_unset(ref); | |
2764 | ||
2765 | ref->unit = u; | |
71fda00f | 2766 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
2767 | return u; |
2768 | } | |
2769 | ||
2770 | void unit_ref_unset(UnitRef *ref) { | |
2771 | assert(ref); | |
2772 | ||
2773 | if (!ref->unit) | |
2774 | return; | |
2775 | ||
71fda00f | 2776 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
2777 | ref->unit = NULL; |
2778 | } | |
2779 | ||
085afe36 LP |
2780 | int unit_cgroup_context_init_defaults(Unit *u, CGroupContext *c) { |
2781 | assert(u); | |
2782 | assert(c); | |
2783 | ||
2784 | /* Copy in the manager defaults into the cgroup context, | |
2785 | * _before_ the rest of the settings have been initialized */ | |
2786 | ||
2787 | c->cpu_accounting = u->manager->default_cpu_accounting; | |
2788 | c->blockio_accounting = u->manager->default_blockio_accounting; | |
2789 | c->memory_accounting = u->manager->default_memory_accounting; | |
2790 | ||
2791 | return 0; | |
2792 | } | |
2793 | ||
2794 | int unit_exec_context_patch_defaults(Unit *u, ExecContext *c) { | |
cba6e062 LP |
2795 | unsigned i; |
2796 | int r; | |
2797 | ||
e06c73cc LP |
2798 | assert(u); |
2799 | assert(c); | |
2800 | ||
085afe36 LP |
2801 | /* Patch in the manager defaults into the exec context, |
2802 | * _after_ the rest of the settings have been initialized */ | |
2803 | ||
cba6e062 | 2804 | /* This only copies in the ones that need memory */ |
cba6e062 LP |
2805 | for (i = 0; i < RLIMIT_NLIMITS; i++) |
2806 | if (u->manager->rlimit[i] && !c->rlimit[i]) { | |
2807 | c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
2808 | if (!c->rlimit[i]) | |
2809 | return -ENOMEM; | |
2810 | } | |
2811 | ||
67445f4e | 2812 | if (u->manager->running_as == SYSTEMD_USER && |
cba6e062 | 2813 | !c->working_directory) { |
e06c73cc | 2814 | |
cba6e062 LP |
2815 | r = get_home_dir(&c->working_directory); |
2816 | if (r < 0) | |
2817 | return r; | |
2818 | } | |
2819 | ||
2820 | return 0; | |
e06c73cc LP |
2821 | } |
2822 | ||
3ef63c31 LP |
2823 | ExecContext *unit_get_exec_context(Unit *u) { |
2824 | size_t offset; | |
2825 | assert(u); | |
2826 | ||
2827 | offset = UNIT_VTABLE(u)->exec_context_offset; | |
2828 | if (offset <= 0) | |
2829 | return NULL; | |
2830 | ||
2831 | return (ExecContext*) ((uint8_t*) u + offset); | |
2832 | } | |
2833 | ||
718db961 LP |
2834 | KillContext *unit_get_kill_context(Unit *u) { |
2835 | size_t offset; | |
2836 | assert(u); | |
2837 | ||
2838 | offset = UNIT_VTABLE(u)->kill_context_offset; | |
2839 | if (offset <= 0) | |
2840 | return NULL; | |
2841 | ||
2842 | return (KillContext*) ((uint8_t*) u + offset); | |
2843 | } | |
2844 | ||
4ad49000 LP |
2845 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
2846 | size_t offset; | |
2847 | ||
2848 | offset = UNIT_VTABLE(u)->cgroup_context_offset; | |
2849 | if (offset <= 0) | |
2850 | return NULL; | |
2851 | ||
2852 | return (CGroupContext*) ((uint8_t*) u + offset); | |
2853 | } | |
2854 | ||
613b411c LP |
2855 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
2856 | size_t offset; | |
2857 | ||
2858 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
2859 | if (offset <= 0) | |
2860 | return NULL; | |
2861 | ||
2862 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
2863 | } | |
2864 | ||
8e2af478 | 2865 | static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, char **_p, char **_q) { |
b9ec9359 | 2866 | _cleanup_free_ char *b = NULL; |
26d04f86 LP |
2867 | char *p, *q; |
2868 | int r; | |
2869 | ||
71645aca | 2870 | assert(u); |
26d04f86 LP |
2871 | assert(name); |
2872 | assert(_p); | |
2873 | assert(_q); | |
71645aca | 2874 | |
b9ec9359 LP |
2875 | b = xescape(name, "/."); |
2876 | if (!b) | |
2877 | return -ENOMEM; | |
2878 | ||
2879 | if (!filename_is_safe(b)) | |
71645aca LP |
2880 | return -EINVAL; |
2881 | ||
26d04f86 LP |
2882 | if (u->manager->running_as == SYSTEMD_USER) { |
2883 | _cleanup_free_ char *c = NULL; | |
2884 | ||
2885 | r = user_config_home(&c); | |
2886 | if (r < 0) | |
2887 | return r; | |
2888 | if (r == 0) | |
2889 | return -ENOENT; | |
2890 | ||
2891 | p = strjoin(c, "/", u->id, ".d", NULL); | |
6d235724 | 2892 | } else if (mode == UNIT_PERSISTENT && !u->transient) |
26d04f86 | 2893 | p = strjoin("/etc/systemd/system/", u->id, ".d", NULL); |
8e2af478 LP |
2894 | else |
2895 | p = strjoin("/run/systemd/system/", u->id, ".d", NULL); | |
71645aca LP |
2896 | if (!p) |
2897 | return -ENOMEM; | |
2898 | ||
b9ec9359 | 2899 | q = strjoin(p, "/90-", b, ".conf", NULL); |
26d04f86 LP |
2900 | if (!q) { |
2901 | free(p); | |
71645aca | 2902 | return -ENOMEM; |
26d04f86 | 2903 | } |
71645aca | 2904 | |
26d04f86 LP |
2905 | *_p = p; |
2906 | *_q = q; | |
2907 | return 0; | |
71645aca LP |
2908 | } |
2909 | ||
8e2af478 | 2910 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
71645aca | 2911 | _cleanup_free_ char *p = NULL, *q = NULL; |
26d04f86 | 2912 | int r; |
71645aca LP |
2913 | |
2914 | assert(u); | |
b42defe3 LP |
2915 | assert(name); |
2916 | assert(data); | |
71645aca | 2917 | |
6d235724 | 2918 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
2919 | return 0; |
2920 | ||
2921 | r = drop_in_file(u, mode, name, &p, &q); | |
26d04f86 LP |
2922 | if (r < 0) |
2923 | return r; | |
71645aca | 2924 | |
26d04f86 | 2925 | mkdir_p(p, 0755); |
574d5f2d | 2926 | return write_string_file_atomic_label(q, data); |
26d04f86 | 2927 | } |
71645aca | 2928 | |
b9ec9359 LP |
2929 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
2930 | _cleanup_free_ char *p = NULL; | |
2931 | va_list ap; | |
2932 | int r; | |
2933 | ||
2934 | assert(u); | |
2935 | assert(name); | |
2936 | assert(format); | |
2937 | ||
6d235724 | 2938 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
2939 | return 0; |
2940 | ||
2941 | va_start(ap, format); | |
2942 | r = vasprintf(&p, format, ap); | |
2943 | va_end(ap); | |
2944 | ||
2945 | if (r < 0) | |
2946 | return -ENOMEM; | |
2947 | ||
2948 | return unit_write_drop_in(u, mode, name, p); | |
2949 | } | |
2950 | ||
2951 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
2952 | _cleanup_free_ char *ndata = NULL; |
2953 | ||
2954 | assert(u); | |
2955 | assert(name); | |
2956 | assert(data); | |
2957 | ||
2958 | if (!UNIT_VTABLE(u)->private_section) | |
2959 | return -EINVAL; | |
2960 | ||
6d235724 | 2961 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
2962 | return 0; |
2963 | ||
b42defe3 LP |
2964 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
2965 | if (!ndata) | |
2966 | return -ENOMEM; | |
2967 | ||
2968 | return unit_write_drop_in(u, mode, name, ndata); | |
2969 | } | |
2970 | ||
b9ec9359 LP |
2971 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
2972 | _cleanup_free_ char *p = NULL; | |
2973 | va_list ap; | |
2974 | int r; | |
2975 | ||
2976 | assert(u); | |
2977 | assert(name); | |
2978 | assert(format); | |
2979 | ||
6d235724 | 2980 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
2981 | return 0; |
2982 | ||
2983 | va_start(ap, format); | |
2984 | r = vasprintf(&p, format, ap); | |
2985 | va_end(ap); | |
2986 | ||
2987 | if (r < 0) | |
2988 | return -ENOMEM; | |
2989 | ||
2990 | return unit_write_drop_in_private(u, mode, name, p); | |
2991 | } | |
2992 | ||
8e2af478 | 2993 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
2994 | _cleanup_free_ char *p = NULL, *q = NULL; |
2995 | int r; | |
71645aca | 2996 | |
26d04f86 | 2997 | assert(u); |
71645aca | 2998 | |
6d235724 | 2999 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3000 | return 0; |
3001 | ||
3002 | r = drop_in_file(u, mode, name, &p, &q); | |
6891529f ZJS |
3003 | if (r < 0) |
3004 | return r; | |
3005 | ||
71645aca | 3006 | if (unlink(q) < 0) |
241da328 | 3007 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 3008 | else |
241da328 | 3009 | r = 1; |
71645aca LP |
3010 | |
3011 | rmdir(p); | |
26d04f86 | 3012 | return r; |
71645aca LP |
3013 | } |
3014 | ||
c2756a68 LP |
3015 | int unit_make_transient(Unit *u) { |
3016 | int r; | |
3017 | ||
3018 | assert(u); | |
3019 | ||
3020 | u->load_state = UNIT_STUB; | |
3021 | u->load_error = 0; | |
3022 | u->transient = true; | |
3023 | ||
3024 | free(u->fragment_path); | |
3025 | u->fragment_path = NULL; | |
3026 | ||
3027 | if (u->manager->running_as == SYSTEMD_USER) { | |
3028 | _cleanup_free_ char *c = NULL; | |
3029 | ||
3030 | r = user_config_home(&c); | |
3031 | if (r < 0) | |
3032 | return r; | |
3033 | if (r == 0) | |
3034 | return -ENOENT; | |
3035 | ||
3036 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
3037 | if (!u->fragment_path) | |
3038 | return -ENOMEM; | |
3039 | ||
3040 | mkdir_p(c, 0755); | |
3041 | } else { | |
3042 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
3043 | if (!u->fragment_path) | |
3044 | return -ENOMEM; | |
3045 | ||
3046 | mkdir_p("/run/systemd/system", 0755); | |
3047 | } | |
3048 | ||
3049 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
3050 | } | |
3051 | ||
cd2086fe LP |
3052 | int unit_kill_context( |
3053 | Unit *u, | |
3054 | KillContext *c, | |
3055 | bool sigkill, | |
3056 | pid_t main_pid, | |
3057 | pid_t control_pid, | |
3058 | bool main_pid_alien) { | |
3059 | ||
bc6aed7b | 3060 | int sig, wait_for_exit = false, r; |
cd2086fe LP |
3061 | |
3062 | assert(u); | |
3063 | assert(c); | |
3064 | ||
3065 | if (c->kill_mode == KILL_NONE) | |
3066 | return 0; | |
3067 | ||
3068 | sig = sigkill ? SIGKILL : c->kill_signal; | |
3069 | ||
3070 | if (main_pid > 0) { | |
3071 | r = kill_and_sigcont(main_pid, sig); | |
3072 | ||
3073 | if (r < 0 && r != -ESRCH) { | |
3074 | _cleanup_free_ char *comm = NULL; | |
3075 | get_process_comm(main_pid, &comm); | |
3076 | ||
6294b8a9 | 3077 | log_warning_unit(u->id, "Failed to kill main process " PID_FMT " (%s): %s", main_pid, strna(comm), strerror(-r)); |
82659fd7 | 3078 | } else { |
bc6aed7b LP |
3079 | if (!main_pid_alien) |
3080 | wait_for_exit = true; | |
82659fd7 | 3081 | |
97e0691f | 3082 | if (c->send_sighup && !sigkill) |
82659fd7 LP |
3083 | kill(main_pid, SIGHUP); |
3084 | } | |
cd2086fe LP |
3085 | } |
3086 | ||
3087 | if (control_pid > 0) { | |
3088 | r = kill_and_sigcont(control_pid, sig); | |
3089 | ||
3090 | if (r < 0 && r != -ESRCH) { | |
3091 | _cleanup_free_ char *comm = NULL; | |
3092 | get_process_comm(control_pid, &comm); | |
3093 | ||
6294b8a9 | 3094 | log_warning_unit(u->id, "Failed to kill control process " PID_FMT " (%s): %s", control_pid, strna(comm), strerror(-r)); |
82659fd7 | 3095 | } else { |
cd2086fe | 3096 | wait_for_exit = true; |
82659fd7 | 3097 | |
97e0691f | 3098 | if (c->send_sighup && !sigkill) |
82659fd7 LP |
3099 | kill(control_pid, SIGHUP); |
3100 | } | |
cd2086fe LP |
3101 | } |
3102 | ||
58ea275a | 3103 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && sigkill)) && u->cgroup_path) { |
cd2086fe LP |
3104 | _cleanup_set_free_ Set *pid_set = NULL; |
3105 | ||
82659fd7 LP |
3106 | /* Exclude the main/control pids from being killed via the cgroup */ |
3107 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3108 | if (!pid_set) |
3109 | return -ENOMEM; | |
3110 | ||
4ad49000 | 3111 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
3112 | if (r < 0) { |
3113 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
3114 | log_warning_unit(u->id, "Failed to kill control group: %s", strerror(-r)); | |
82659fd7 | 3115 | } else if (r > 0) { |
bc6aed7b | 3116 | |
743970d2 LP |
3117 | /* FIXME: For now, we will not wait for the |
3118 | * cgroup members to die, simply because | |
3119 | * cgroup notification is unreliable. It | |
3120 | * doesn't work at all in containers, and | |
3121 | * outside of containers it can be confused | |
3122 | * easily by leaving directories in the | |
3123 | * cgroup. */ | |
3124 | ||
3125 | /* wait_for_exit = true; */ | |
58ea275a | 3126 | |
97e0691f | 3127 | if (c->send_sighup && !sigkill) { |
82659fd7 LP |
3128 | set_free(pid_set); |
3129 | ||
3130 | pid_set = unit_pid_set(main_pid, control_pid); | |
3131 | if (!pid_set) | |
3132 | return -ENOMEM; | |
3133 | ||
8190da36 | 3134 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3135 | } |
3136 | } | |
cd2086fe LP |
3137 | } |
3138 | ||
3139 | return wait_for_exit; | |
3140 | } | |
3141 | ||
a57f7e2c LP |
3142 | int unit_require_mounts_for(Unit *u, const char *path) { |
3143 | char prefix[strlen(path) + 1], *p; | |
3144 | int r; | |
3145 | ||
3146 | assert(u); | |
3147 | assert(path); | |
3148 | ||
3149 | /* Registers a unit for requiring a certain path and all its | |
3150 | * prefixes. We keep a simple array of these paths in the | |
3151 | * unit, since its usually short. However, we build a prefix | |
3152 | * table for all possible prefixes so that new appearing mount | |
3153 | * units can easily determine which units to make themselves a | |
3154 | * dependency of. */ | |
3155 | ||
70b64bd3 ZJS |
3156 | if (!path_is_absolute(path)) |
3157 | return -EINVAL; | |
3158 | ||
a57f7e2c LP |
3159 | p = strdup(path); |
3160 | if (!p) | |
3161 | return -ENOMEM; | |
3162 | ||
3163 | path_kill_slashes(p); | |
3164 | ||
a57f7e2c LP |
3165 | if (!path_is_safe(p)) { |
3166 | free(p); | |
3167 | return -EPERM; | |
3168 | } | |
3169 | ||
3170 | if (strv_contains(u->requires_mounts_for, p)) { | |
3171 | free(p); | |
3172 | return 0; | |
3173 | } | |
3174 | ||
3175 | r = strv_push(&u->requires_mounts_for, p); | |
3176 | if (r < 0) { | |
3177 | free(p); | |
3178 | return r; | |
3179 | } | |
3180 | ||
3181 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3182 | Set *x; | |
3183 | ||
3184 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3185 | if (!x) { | |
3186 | char *q; | |
3187 | ||
3188 | if (!u->manager->units_requiring_mounts_for) { | |
3189 | u->manager->units_requiring_mounts_for = hashmap_new(string_hash_func, string_compare_func); | |
3190 | if (!u->manager->units_requiring_mounts_for) | |
3191 | return -ENOMEM; | |
3192 | } | |
3193 | ||
3194 | q = strdup(prefix); | |
3195 | if (!q) | |
3196 | return -ENOMEM; | |
3197 | ||
3198 | x = set_new(NULL, NULL); | |
3199 | if (!x) { | |
3200 | free(q); | |
3201 | return -ENOMEM; | |
3202 | } | |
3203 | ||
3204 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3205 | if (r < 0) { | |
3206 | free(q); | |
3207 | set_free(x); | |
3208 | return r; | |
3209 | } | |
3210 | } | |
3211 | ||
3212 | r = set_put(x, u); | |
3213 | if (r < 0) | |
3214 | return r; | |
3215 | } | |
3216 | ||
3217 | return 0; | |
3218 | } | |
3219 | ||
613b411c LP |
3220 | int unit_setup_exec_runtime(Unit *u) { |
3221 | ExecRuntime **rt; | |
3222 | size_t offset; | |
3223 | Iterator i; | |
3224 | Unit *other; | |
3225 | ||
3226 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3227 | assert(offset > 0); | |
3228 | ||
3229 | /* Check if ther already is an ExecRuntime for this unit? */ | |
3230 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
3231 | if (*rt) | |
3232 | return 0; | |
3233 | ||
3234 | /* Try to get it from somebody else */ | |
3235 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3236 | ||
3237 | *rt = unit_get_exec_runtime(other); | |
3238 | if (*rt) { | |
3239 | exec_runtime_ref(*rt); | |
3240 | return 0; | |
3241 | } | |
3242 | } | |
3243 | ||
3244 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3245 | } | |
3246 | ||
94f04347 LP |
3247 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3248 | [UNIT_ACTIVE] = "active", | |
032ff4af | 3249 | [UNIT_RELOADING] = "reloading", |
94f04347 | 3250 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 3251 | [UNIT_FAILED] = "failed", |
94f04347 LP |
3252 | [UNIT_ACTIVATING] = "activating", |
3253 | [UNIT_DEACTIVATING] = "deactivating" | |
3254 | }; | |
3255 | ||
3256 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
3257 | ||
3258 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
3259 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 3260 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 | 3261 | [UNIT_REQUISITE] = "Requisite", |
9e2f7c11 | 3262 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
ac6a4abe MS |
3263 | [UNIT_WANTS] = "Wants", |
3264 | [UNIT_BINDS_TO] = "BindsTo", | |
3265 | [UNIT_PART_OF] = "PartOf", | |
94f04347 | 3266 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 3267 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 | 3268 | [UNIT_WANTED_BY] = "WantedBy", |
ac6a4abe MS |
3269 | [UNIT_BOUND_BY] = "BoundBy", |
3270 | [UNIT_CONSISTS_OF] = "ConsistsOf", | |
94f04347 | 3271 | [UNIT_CONFLICTS] = "Conflicts", |
69dd2852 | 3272 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
94f04347 LP |
3273 | [UNIT_BEFORE] = "Before", |
3274 | [UNIT_AFTER] = "After", | |
57020a3a LP |
3275 | [UNIT_ON_FAILURE] = "OnFailure", |
3276 | [UNIT_TRIGGERS] = "Triggers", | |
4dcc1cb4 | 3277 | [UNIT_TRIGGERED_BY] = "TriggeredBy", |
7f2cddae | 3278 | [UNIT_PROPAGATES_RELOAD_TO] = "PropagatesReloadTo", |
ac6a4abe MS |
3279 | [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom", |
3280 | [UNIT_REFERENCES] = "References", | |
3281 | [UNIT_REFERENCED_BY] = "ReferencedBy", | |
613b411c | 3282 | [UNIT_JOINS_NAMESPACE_OF] = "JoinsNamespaceOf", |
94f04347 LP |
3283 | }; |
3284 | ||
3285 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |