]>
Commit | Line | Data |
---|---|---|
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 */ |
8f8f05a9 LP |
331 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
332 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 333 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
334 | return; |
335 | } | |
336 | ||
71fda00f | 337 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 338 | u->in_dbus_queue = true; |
c1e1601e LP |
339 | } |
340 | ||
87f0e418 LP |
341 | static void bidi_set_free(Unit *u, Set *s) { |
342 | Iterator i; | |
343 | Unit *other; | |
344 | ||
345 | assert(u); | |
346 | ||
347 | /* Frees the set and makes sure we are dropped from the | |
348 | * inverse pointers */ | |
349 | ||
350 | SET_FOREACH(other, s, i) { | |
351 | UnitDependency d; | |
352 | ||
353 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 354 | set_remove(other->dependencies[d], u); |
701cc384 LP |
355 | |
356 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
357 | } |
358 | ||
359 | set_free(s); | |
360 | } | |
361 | ||
c2756a68 LP |
362 | static void unit_remove_transient(Unit *u) { |
363 | char **i; | |
364 | ||
365 | assert(u); | |
366 | ||
367 | if (!u->transient) | |
368 | return; | |
369 | ||
370 | if (u->fragment_path) | |
371 | unlink(u->fragment_path); | |
372 | ||
373 | STRV_FOREACH(i, u->dropin_paths) { | |
374 | _cleanup_free_ char *p = NULL; | |
375 | int r; | |
376 | ||
377 | unlink(*i); | |
378 | ||
379 | r = path_get_parent(*i, &p); | |
380 | if (r >= 0) | |
381 | rmdir(p); | |
382 | } | |
383 | } | |
384 | ||
a57f7e2c LP |
385 | static void unit_free_requires_mounts_for(Unit *u) { |
386 | char **j; | |
387 | ||
388 | STRV_FOREACH(j, u->requires_mounts_for) { | |
389 | char s[strlen(*j) + 1]; | |
390 | ||
391 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
392 | char *y; | |
393 | Set *x; | |
394 | ||
395 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
396 | if (!x) | |
397 | continue; | |
398 | ||
399 | set_remove(x, u); | |
400 | ||
401 | if (set_isempty(x)) { | |
402 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
403 | free(y); | |
404 | set_free(x); | |
405 | } | |
406 | } | |
407 | } | |
408 | ||
409 | strv_free(u->requires_mounts_for); | |
410 | u->requires_mounts_for = NULL; | |
411 | } | |
412 | ||
87f0e418 LP |
413 | void unit_free(Unit *u) { |
414 | UnitDependency d; | |
415 | Iterator i; | |
416 | char *t; | |
417 | ||
418 | assert(u); | |
419 | ||
c2756a68 LP |
420 | if (u->manager->n_reloading <= 0) |
421 | unit_remove_transient(u); | |
422 | ||
c1e1601e LP |
423 | bus_unit_send_removed_signal(u); |
424 | ||
ac155bb8 | 425 | if (u->load_state != UNIT_STUB) |
a013b84b LP |
426 | if (UNIT_VTABLE(u)->done) |
427 | UNIT_VTABLE(u)->done(u); | |
428 | ||
a57f7e2c LP |
429 | unit_free_requires_mounts_for(u); |
430 | ||
ac155bb8 MS |
431 | SET_FOREACH(t, u->names, i) |
432 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 433 | |
97e7d748 MS |
434 | if (u->job) { |
435 | Job *j = u->job; | |
436 | job_uninstall(j); | |
437 | job_free(j); | |
438 | } | |
964e0949 | 439 | |
e0209d83 MS |
440 | if (u->nop_job) { |
441 | Job *j = u->nop_job; | |
442 | job_uninstall(j); | |
443 | job_free(j); | |
444 | } | |
445 | ||
964e0949 | 446 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 447 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 448 | |
ac155bb8 | 449 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 450 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 451 | |
ac155bb8 | 452 | if (u->in_load_queue) |
71fda00f | 453 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 454 | |
ac155bb8 | 455 | if (u->in_dbus_queue) |
71fda00f | 456 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 457 | |
ac155bb8 | 458 | if (u->in_cleanup_queue) |
71fda00f | 459 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 460 | |
ac155bb8 | 461 | if (u->in_gc_queue) { |
71fda00f | 462 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 463 | u->manager->n_in_gc_queue--; |
701cc384 LP |
464 | } |
465 | ||
4ad49000 | 466 | if (u->in_cgroup_queue) |
71fda00f | 467 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 468 | |
72673e86 LP |
469 | if (u->cgroup_path) { |
470 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
471 | free(u->cgroup_path); | |
472 | } | |
473 | ||
ac155bb8 | 474 | free(u->description); |
49dbfa7b | 475 | strv_free(u->documentation); |
ac155bb8 | 476 | free(u->fragment_path); |
1b64d026 | 477 | free(u->source_path); |
ae7a7182 | 478 | strv_free(u->dropin_paths); |
ac155bb8 | 479 | free(u->instance); |
87f0e418 | 480 | |
ac155bb8 | 481 | set_free_free(u->names); |
87f0e418 | 482 | |
a911bb9a LP |
483 | unit_unwatch_all_pids(u); |
484 | ||
ac155bb8 | 485 | condition_free_list(u->conditions); |
52661efd | 486 | |
702a2d8f LP |
487 | unit_ref_unset(&u->slice); |
488 | ||
ac155bb8 MS |
489 | while (u->refs) |
490 | unit_ref_unset(u->refs); | |
57020a3a | 491 | |
87f0e418 LP |
492 | free(u); |
493 | } | |
494 | ||
495 | UnitActiveState unit_active_state(Unit *u) { | |
496 | assert(u); | |
497 | ||
ac155bb8 | 498 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
499 | return unit_active_state(unit_follow_merge(u)); |
500 | ||
501 | /* After a reload it might happen that a unit is not correctly | |
502 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 503 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
504 | |
505 | return UNIT_VTABLE(u)->active_state(u); | |
506 | } | |
507 | ||
10a94420 LP |
508 | const char* unit_sub_state_to_string(Unit *u) { |
509 | assert(u); | |
510 | ||
511 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
512 | } | |
513 | ||
23a177ef LP |
514 | static void complete_move(Set **s, Set **other) { |
515 | assert(s); | |
516 | assert(other); | |
87f0e418 | 517 | |
23a177ef LP |
518 | if (!*other) |
519 | return; | |
87f0e418 LP |
520 | |
521 | if (*s) | |
23a177ef LP |
522 | set_move(*s, *other); |
523 | else { | |
524 | *s = *other; | |
525 | *other = NULL; | |
526 | } | |
527 | } | |
87f0e418 | 528 | |
23a177ef LP |
529 | static void merge_names(Unit *u, Unit *other) { |
530 | char *t; | |
531 | Iterator i; | |
87f0e418 | 532 | |
23a177ef LP |
533 | assert(u); |
534 | assert(other); | |
535 | ||
ac155bb8 | 536 | complete_move(&u->names, &other->names); |
23a177ef | 537 | |
ac155bb8 MS |
538 | set_free_free(other->names); |
539 | other->names = NULL; | |
540 | other->id = NULL; | |
23a177ef | 541 | |
ac155bb8 MS |
542 | SET_FOREACH(t, u->names, i) |
543 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
87f0e418 LP |
544 | } |
545 | ||
23a177ef LP |
546 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
547 | Iterator i; | |
548 | Unit *back; | |
87f0e418 | 549 | int r; |
23a177ef LP |
550 | |
551 | assert(u); | |
552 | assert(other); | |
553 | assert(d < _UNIT_DEPENDENCY_MAX); | |
554 | ||
83a95334 | 555 | /* Fix backwards pointers */ |
ac155bb8 | 556 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
557 | UnitDependency k; |
558 | ||
e48614c4 ZJS |
559 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
560 | r = set_remove_and_put(back->dependencies[k], other, u); | |
561 | if (r == -EEXIST) | |
562 | set_remove(back->dependencies[k], other); | |
563 | else | |
564 | assert(r >= 0 || r == -ENOENT); | |
565 | } | |
23a177ef LP |
566 | } |
567 | ||
ac155bb8 | 568 | complete_move(&u->dependencies[d], &other->dependencies[d]); |
23a177ef | 569 | |
ac155bb8 MS |
570 | set_free(other->dependencies[d]); |
571 | other->dependencies[d] = NULL; | |
23a177ef LP |
572 | } |
573 | ||
574 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
575 | UnitDependency d; |
576 | ||
577 | assert(u); | |
578 | assert(other); | |
ac155bb8 MS |
579 | assert(u->manager == other->manager); |
580 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 581 | |
cc916967 LP |
582 | other = unit_follow_merge(other); |
583 | ||
23a177ef LP |
584 | if (other == u) |
585 | return 0; | |
586 | ||
ac155bb8 | 587 | if (u->type != other->type) |
9e2f7c11 LP |
588 | return -EINVAL; |
589 | ||
ac155bb8 | 590 | if (!u->instance != !other->instance) |
87f0e418 LP |
591 | return -EINVAL; |
592 | ||
ac155bb8 | 593 | if (other->load_state != UNIT_STUB && |
c2756a68 | 594 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 595 | return -EEXIST; |
87f0e418 | 596 | |
ac155bb8 | 597 | if (other->job) |
819e213f LP |
598 | return -EEXIST; |
599 | ||
e0209d83 MS |
600 | if (other->nop_job) |
601 | return -EEXIST; | |
602 | ||
fdf20a31 | 603 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
604 | return -EEXIST; |
605 | ||
87f0e418 | 606 | /* Merge names */ |
23a177ef | 607 | merge_names(u, other); |
87f0e418 | 608 | |
57020a3a | 609 | /* Redirect all references */ |
ac155bb8 MS |
610 | while (other->refs) |
611 | unit_ref_set(other->refs, u); | |
57020a3a | 612 | |
87f0e418 LP |
613 | /* Merge dependencies */ |
614 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 615 | merge_dependencies(u, other, d); |
87f0e418 | 616 | |
ac155bb8 MS |
617 | other->load_state = UNIT_MERGED; |
618 | other->merged_into = u; | |
23a177ef | 619 | |
3616a49c LP |
620 | /* If there is still some data attached to the other node, we |
621 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 622 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
623 | if (UNIT_VTABLE(other)->done) |
624 | UNIT_VTABLE(other)->done(other); | |
625 | ||
626 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
627 | unit_add_to_cleanup_queue(other); |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
632 | int unit_merge_by_name(Unit *u, const char *name) { | |
633 | Unit *other; | |
9e2f7c11 | 634 | int r; |
68eda4bd | 635 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
636 | |
637 | assert(u); | |
638 | assert(name); | |
639 | ||
9e2f7c11 | 640 | if (unit_name_is_template(name)) { |
ac155bb8 | 641 | if (!u->instance) |
9e2f7c11 LP |
642 | return -EINVAL; |
643 | ||
e48614c4 ZJS |
644 | s = unit_name_replace_instance(name, u->instance); |
645 | if (!s) | |
9e2f7c11 LP |
646 | return -ENOMEM; |
647 | ||
648 | name = s; | |
649 | } | |
650 | ||
c2756a68 LP |
651 | other = manager_get_unit(u->manager, name); |
652 | if (!other) | |
9e2f7c11 LP |
653 | r = unit_add_name(u, name); |
654 | else | |
655 | r = unit_merge(u, other); | |
23a177ef | 656 | |
9e2f7c11 | 657 | return r; |
23a177ef LP |
658 | } |
659 | ||
660 | Unit* unit_follow_merge(Unit *u) { | |
661 | assert(u); | |
662 | ||
ac155bb8 MS |
663 | while (u->load_state == UNIT_MERGED) |
664 | assert_se(u = u->merged_into); | |
23a177ef LP |
665 | |
666 | return u; | |
667 | } | |
668 | ||
669 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
670 | int r; | |
671 | ||
672 | assert(u); | |
673 | assert(c); | |
674 | ||
36be24c8 ZJS |
675 | if (c->working_directory) { |
676 | r = unit_require_mounts_for(u, c->working_directory); | |
677 | if (r < 0) | |
678 | return r; | |
679 | } | |
680 | ||
681 | if (c->root_directory) { | |
682 | r = unit_require_mounts_for(u, c->root_directory); | |
683 | if (r < 0) | |
684 | return r; | |
685 | } | |
686 | ||
ecc6e2b8 LP |
687 | if (c->std_output != EXEC_OUTPUT_KMSG && |
688 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 689 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
690 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
691 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 692 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 693 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 694 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 695 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 696 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 697 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 698 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
699 | return 0; |
700 | ||
701 | /* If syslog or kernel logging is requested, make sure our own | |
702 | * logging daemon is run first. */ | |
703 | ||
9d246da3 MS |
704 | if (u->manager->running_as == SYSTEMD_SYSTEM) { |
705 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); | |
706 | if (r < 0) | |
23a177ef | 707 | return r; |
9d246da3 | 708 | } |
23a177ef | 709 | |
87f0e418 LP |
710 | return 0; |
711 | } | |
712 | ||
87f0e418 LP |
713 | const char *unit_description(Unit *u) { |
714 | assert(u); | |
715 | ||
ac155bb8 MS |
716 | if (u->description) |
717 | return u->description; | |
87f0e418 | 718 | |
ac155bb8 | 719 | return strna(u->id); |
87f0e418 LP |
720 | } |
721 | ||
722 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 723 | char *t, **j; |
87f0e418 LP |
724 | UnitDependency d; |
725 | Iterator i; | |
68eda4bd | 726 | _cleanup_free_ char *p2 = NULL; |
47be870b | 727 | const char *prefix2; |
173e3821 LP |
728 | char |
729 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
730 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
731 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
732 | timestamp4[FORMAT_TIMESTAMP_MAX], |
733 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 734 | Unit *following; |
eeaedb7c LP |
735 | _cleanup_set_free_ Set *following_set = NULL; |
736 | int r; | |
87f0e418 LP |
737 | |
738 | assert(u); | |
ac155bb8 | 739 | assert(u->type >= 0); |
87f0e418 LP |
740 | |
741 | if (!prefix) | |
742 | prefix = ""; | |
47be870b LP |
743 | p2 = strappend(prefix, "\t"); |
744 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
745 | |
746 | fprintf(f, | |
40d50879 | 747 | "%s-> Unit %s:\n" |
87f0e418 | 748 | "%s\tDescription: %s\n" |
9e2f7c11 | 749 | "%s\tInstance: %s\n" |
87f0e418 | 750 | "%s\tUnit Load State: %s\n" |
2fad8195 | 751 | "%s\tUnit Active State: %s\n" |
173e3821 | 752 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 753 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 754 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 755 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 756 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 757 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 758 | "%s\tTransient: %s\n" |
4ad49000 LP |
759 | "%s\tSlice: %s\n" |
760 | "%s\tCGroup: %s\n" | |
761 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
762 | "%s\tCGroup mask: 0x%x\n" |
763 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 764 | prefix, u->id, |
87f0e418 | 765 | prefix, unit_description(u), |
ac155bb8 MS |
766 | prefix, strna(u->instance), |
767 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 768 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
769 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
770 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
771 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
772 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 773 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 774 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 775 | prefix, yes_no(u->transient), |
4ad49000 LP |
776 | prefix, strna(unit_slice_name(u)), |
777 | prefix, strna(u->cgroup_path), | |
778 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 779 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 780 | prefix, u->cgroup_members_mask); |
0301abf4 | 781 | |
ac155bb8 | 782 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
783 | fprintf(f, "%s\tName: %s\n", prefix, t); |
784 | ||
49dbfa7b LP |
785 | STRV_FOREACH(j, u->documentation) |
786 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
787 | ||
eeaedb7c LP |
788 | following = unit_following(u); |
789 | if (following) | |
ac155bb8 | 790 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 791 | |
eeaedb7c LP |
792 | r = unit_following_set(u, &following_set); |
793 | if (r >= 0) { | |
794 | Unit *other; | |
795 | ||
796 | SET_FOREACH(other, following_set, i) | |
797 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
798 | } | |
799 | ||
ac155bb8 MS |
800 | if (u->fragment_path) |
801 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 802 | |
1b64d026 LP |
803 | if (u->source_path) |
804 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
805 | ||
ae7a7182 | 806 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 807 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 808 | |
ac155bb8 | 809 | if (u->job_timeout > 0) |
2fa4092c | 810 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 811 | |
ac155bb8 | 812 | condition_dump_list(u->conditions, f, prefix); |
52661efd | 813 | |
ac155bb8 | 814 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
815 | fprintf(f, |
816 | "%s\tCondition Timestamp: %s\n" | |
817 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
818 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
819 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 820 | |
87f0e418 LP |
821 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
822 | Unit *other; | |
823 | ||
ac155bb8 MS |
824 | SET_FOREACH(other, u->dependencies[d], i) |
825 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
826 | } |
827 | ||
7c8fa05c | 828 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
829 | fprintf(f, |
830 | "%s\tRequiresMountsFor:", prefix); | |
831 | ||
832 | STRV_FOREACH(j, u->requires_mounts_for) | |
833 | fprintf(f, " %s", *j); | |
834 | ||
835 | fputs("\n", f); | |
836 | } | |
837 | ||
ac155bb8 | 838 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 839 | |
b0650475 | 840 | fprintf(f, |
a40eb732 | 841 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
842 | "%s\tRefuseManualStart: %s\n" |
843 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 844 | "%s\tDefaultDependencies: %s\n" |
d420282b | 845 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
846 | "%s\tIgnoreOnIsolate: %s\n" |
847 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
848 | prefix, yes_no(u->stop_when_unneeded), |
849 | prefix, yes_no(u->refuse_manual_start), | |
850 | prefix, yes_no(u->refuse_manual_stop), | |
851 | prefix, yes_no(u->default_dependencies), | |
d420282b | 852 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
853 | prefix, yes_no(u->ignore_on_isolate), |
854 | prefix, yes_no(u->ignore_on_snapshot)); | |
855 | ||
23a177ef LP |
856 | if (UNIT_VTABLE(u)->dump) |
857 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 858 | |
ac155bb8 | 859 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
860 | fprintf(f, |
861 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
862 | prefix, u->merged_into->id); |
863 | else if (u->load_state == UNIT_ERROR) | |
864 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 865 | |
87f0e418 | 866 | |
ac155bb8 MS |
867 | if (u->job) |
868 | job_dump(u->job, f, prefix2); | |
87f0e418 | 869 | |
e0209d83 MS |
870 | if (u->nop_job) |
871 | job_dump(u->nop_job, f, prefix2); | |
872 | ||
87f0e418 LP |
873 | } |
874 | ||
875 | /* Common implementation for multiple backends */ | |
e537352b | 876 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
877 | int r; |
878 | ||
879 | assert(u); | |
23a177ef | 880 | |
e48614c4 | 881 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
882 | r = unit_load_fragment(u); |
883 | if (r < 0) | |
23a177ef LP |
884 | return r; |
885 | ||
ac155bb8 | 886 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
887 | return -ENOENT; |
888 | ||
889 | /* Load drop-in directory data */ | |
4ad49000 LP |
890 | r = unit_load_dropin(unit_follow_merge(u)); |
891 | if (r < 0) | |
23a177ef LP |
892 | return r; |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
897 | /* Common implementation for multiple backends */ | |
e537352b | 898 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 899 | int r; |
87f0e418 LP |
900 | |
901 | assert(u); | |
902 | ||
23a177ef LP |
903 | /* Same as unit_load_fragment_and_dropin(), but whether |
904 | * something can be loaded or not doesn't matter. */ | |
905 | ||
906 | /* Load a .service file */ | |
4ad49000 LP |
907 | r = unit_load_fragment(u); |
908 | if (r < 0) | |
87f0e418 LP |
909 | return r; |
910 | ||
ac155bb8 MS |
911 | if (u->load_state == UNIT_STUB) |
912 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 913 | |
87f0e418 | 914 | /* Load drop-in directory data */ |
4ad49000 LP |
915 | r = unit_load_dropin(unit_follow_merge(u)); |
916 | if (r < 0) | |
87f0e418 LP |
917 | return r; |
918 | ||
23a177ef | 919 | return 0; |
87f0e418 LP |
920 | } |
921 | ||
bba34eed | 922 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
923 | assert(u); |
924 | assert(target); | |
925 | ||
ac155bb8 | 926 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
927 | return 0; |
928 | ||
35b8ca3a | 929 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 930 | * that loop check below is reliable */ |
ac155bb8 MS |
931 | if (u->load_state != UNIT_LOADED || |
932 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
933 | return 0; |
934 | ||
21256a2b LP |
935 | /* If either side wants no automatic dependencies, then let's |
936 | * skip this */ | |
ac155bb8 MS |
937 | if (!u->default_dependencies || |
938 | !target->default_dependencies) | |
21256a2b LP |
939 | return 0; |
940 | ||
98bc2000 | 941 | /* Don't create loops */ |
ac155bb8 | 942 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
943 | return 0; |
944 | ||
945 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
946 | } | |
947 | ||
e954c9cf | 948 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 949 | |
21256a2b LP |
950 | static const UnitDependency deps[] = { |
951 | UNIT_REQUIRED_BY, | |
952 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
953 | UNIT_WANTED_BY, | |
954 | UNIT_BOUND_BY | |
955 | }; | |
956 | ||
bba34eed | 957 | Unit *target; |
98bc2000 | 958 | Iterator i; |
21256a2b | 959 | unsigned k; |
db57f3c6 | 960 | int r = 0; |
98bc2000 LP |
961 | |
962 | assert(u); | |
963 | ||
21256a2b | 964 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
965 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
966 | r = unit_add_default_target_dependency(u, target); | |
967 | if (r < 0) | |
21256a2b | 968 | return r; |
a016b922 LP |
969 | } |
970 | ||
e954c9cf LP |
971 | return r; |
972 | } | |
4ad49000 | 973 | |
e954c9cf LP |
974 | static int unit_add_slice_dependencies(Unit *u) { |
975 | assert(u); | |
b81884e7 | 976 | |
e954c9cf LP |
977 | if (!unit_get_cgroup_context(u)) |
978 | return 0; | |
979 | ||
980 | if (UNIT_ISSET(u->slice)) | |
981 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
982 | ||
983 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); | |
98bc2000 LP |
984 | } |
985 | ||
e954c9cf | 986 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
987 | char **i; |
988 | int r; | |
989 | ||
990 | assert(u); | |
991 | ||
992 | STRV_FOREACH(i, u->requires_mounts_for) { | |
993 | char prefix[strlen(*i) + 1]; | |
994 | ||
995 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
996 | Unit *m; | |
997 | ||
998 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
999 | if (r < 0) | |
1000 | return r; | |
1001 | if (r == 0) | |
1002 | continue; | |
1003 | if (m == u) | |
1004 | continue; | |
1005 | ||
1006 | if (m->load_state != UNIT_LOADED) | |
1007 | continue; | |
1008 | ||
1009 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1010 | if (r < 0) | |
1011 | return r; | |
1012 | ||
1013 | if (m->fragment_path) { | |
1014 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1015 | if (r < 0) | |
1016 | return r; | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
87f0e418 LP |
1024 | int unit_load(Unit *u) { |
1025 | int r; | |
1026 | ||
1027 | assert(u); | |
1028 | ||
ac155bb8 | 1029 | if (u->in_load_queue) { |
71fda00f | 1030 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1031 | u->in_load_queue = false; |
87f0e418 LP |
1032 | } |
1033 | ||
ac155bb8 | 1034 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1035 | return -EINVAL; |
1036 | ||
ac155bb8 | 1037 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1038 | return 0; |
1039 | ||
c2756a68 LP |
1040 | if (UNIT_VTABLE(u)->load) { |
1041 | r = UNIT_VTABLE(u)->load(u); | |
1042 | if (r < 0) | |
87f0e418 | 1043 | goto fail; |
c2756a68 | 1044 | } |
23a177ef | 1045 | |
ac155bb8 | 1046 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1047 | r = -ENOENT; |
1048 | goto fail; | |
1049 | } | |
1050 | ||
7c8fa05c | 1051 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1052 | |
e954c9cf LP |
1053 | r = unit_add_target_dependencies(u); |
1054 | if (r < 0) | |
1055 | goto fail; | |
1056 | ||
1057 | r = unit_add_slice_dependencies(u); | |
1058 | if (r < 0) | |
1059 | goto fail; | |
c2756a68 | 1060 | |
e954c9cf | 1061 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1062 | if (r < 0) |
c2756a68 | 1063 | goto fail; |
7c8fa05c | 1064 | |
bc432dc7 LP |
1065 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
1066 | log_error_unit(u->id, "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id); | |
c2756a68 LP |
1067 | r = -EINVAL; |
1068 | goto fail; | |
1069 | } | |
bc432dc7 LP |
1070 | |
1071 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1072 | } |
1073 | ||
ac155bb8 | 1074 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1075 | |
1076 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1077 | unit_add_to_gc_queue(u); |
87f0e418 | 1078 | |
87f0e418 LP |
1079 | return 0; |
1080 | ||
1081 | fail: | |
c2756a68 | 1082 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1083 | u->load_error = r; |
c1e1601e | 1084 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1085 | unit_add_to_gc_queue(u); |
23a177ef | 1086 | |
c1b6628d ZJS |
1087 | log_debug_unit(u->id, "Failed to load configuration for %s: %s", |
1088 | u->id, strerror(-r)); | |
23a177ef | 1089 | |
87f0e418 LP |
1090 | return r; |
1091 | } | |
1092 | ||
9588bc32 | 1093 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1094 | assert(u); |
1095 | ||
ac155bb8 | 1096 | dual_timestamp_get(&u->condition_timestamp); |
4b744dfa | 1097 | u->condition_result = condition_test_list(u->id, u->conditions); |
90bbc946 | 1098 | |
ac155bb8 | 1099 | return u->condition_result; |
90bbc946 LP |
1100 | } |
1101 | ||
44a6b1b6 | 1102 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 1103 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1104 | |
1105 | assert(u); | |
1106 | assert(t >= 0); | |
1107 | assert(t < _JOB_TYPE_MAX); | |
1108 | ||
1109 | if (t != JOB_START && t != JOB_STOP) | |
1110 | return NULL; | |
c6918296 MS |
1111 | |
1112 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1113 | if (!format_table) | |
877d54e9 LP |
1114 | return NULL; |
1115 | ||
1116 | return format_table->starting_stopping[t == JOB_STOP]; | |
1117 | } | |
1118 | ||
44a6b1b6 | 1119 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { |
877d54e9 LP |
1120 | const char *format; |
1121 | ||
1122 | assert(u); | |
1123 | assert(t >= 0); | |
1124 | assert(t < _JOB_TYPE_MAX); | |
1125 | ||
1126 | format = unit_get_status_message_format(u, t); | |
1127 | if (format) | |
1128 | return format; | |
1129 | ||
1130 | /* Return generic strings */ | |
1131 | if (t == JOB_START) | |
1132 | return "Starting %s."; | |
1133 | else if (t == JOB_STOP) | |
1134 | return "Stopping %s."; | |
1135 | else if (t == JOB_RELOAD) | |
1136 | return "Reloading %s."; | |
1137 | ||
1138 | return NULL; | |
1139 | } | |
1140 | ||
1141 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1142 | const char *format; | |
1143 | ||
1144 | assert(u); | |
1145 | ||
1146 | /* We only print status messages for selected units on | |
1147 | * selected operations. */ | |
c6918296 | 1148 | |
877d54e9 | 1149 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
1150 | if (!format) |
1151 | return; | |
1152 | ||
bcfce235 | 1153 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1154 | unit_status_printf(u, "", format); |
bcfce235 | 1155 | REENABLE_WARNING; |
c6918296 MS |
1156 | } |
1157 | ||
877d54e9 LP |
1158 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1159 | const char *format; | |
1160 | char buf[LINE_MAX]; | |
1161 | sd_id128_t mid; | |
1162 | ||
1163 | assert(u); | |
1164 | ||
1165 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1166 | return; | |
1167 | ||
81270860 LP |
1168 | if (log_on_console()) |
1169 | return; | |
1170 | ||
877d54e9 LP |
1171 | /* We log status messages for all units and all operations. */ |
1172 | ||
1173 | format = unit_get_status_message_format_try_harder(u, t); | |
1174 | if (!format) | |
1175 | return; | |
1176 | ||
bcfce235 | 1177 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 LP |
1178 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
1179 | char_array_0(buf); | |
bcfce235 | 1180 | REENABLE_WARNING; |
877d54e9 LP |
1181 | |
1182 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1183 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1184 | SD_MESSAGE_UNIT_RELOADING; | |
1185 | ||
bbc9006e | 1186 | log_struct_unit(LOG_INFO, |
c1b6628d ZJS |
1187 | u->id, |
1188 | MESSAGE_ID(mid), | |
1189 | "MESSAGE=%s", buf, | |
1190 | NULL); | |
877d54e9 | 1191 | } |
877d54e9 | 1192 | |
87f0e418 | 1193 | /* Errors: |
d5159713 LP |
1194 | * -EBADR: This unit type does not support starting. |
1195 | * -EALREADY: Unit is already started. | |
1196 | * -EAGAIN: An operation is already in progress. Retry later. | |
1197 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
1198 | */ |
1199 | int unit_start(Unit *u) { | |
1200 | UnitActiveState state; | |
92ab323c | 1201 | Unit *following; |
87f0e418 LP |
1202 | |
1203 | assert(u); | |
1204 | ||
ac155bb8 | 1205 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1206 | return -EINVAL; |
1207 | ||
a82e5507 LP |
1208 | /* If this is already started, then this will succeed. Note |
1209 | * that this will even succeed if this unit is not startable | |
1210 | * by the user. This is relied on to detect when we need to | |
1211 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1212 | state = unit_active_state(u); |
1213 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1214 | return -EALREADY; | |
1215 | ||
a82e5507 LP |
1216 | /* If the conditions failed, don't do anything at all. If we |
1217 | * already are activating this call might still be useful to | |
1218 | * speed up activation in case there is some hold-off time, | |
1219 | * but we don't want to recheck the condition in that case. */ | |
1220 | if (state != UNIT_ACTIVATING && | |
1221 | !unit_condition_test(u)) { | |
c1b6628d | 1222 | log_debug_unit(u->id, "Starting of %s requested but condition failed. Ignoring.", u->id); |
52661efd LP |
1223 | return -EALREADY; |
1224 | } | |
1225 | ||
92ab323c | 1226 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1227 | following = unit_following(u); |
1228 | if (following) { | |
c1b6628d ZJS |
1229 | log_debug_unit(u->id, "Redirecting start request from %s to %s.", |
1230 | u->id, following->id); | |
92ab323c LP |
1231 | return unit_start(following); |
1232 | } | |
1233 | ||
877d54e9 LP |
1234 | unit_status_log_starting_stopping_reloading(u, JOB_START); |
1235 | unit_status_print_starting_stopping(u, JOB_START); | |
c6918296 | 1236 | |
92ab323c LP |
1237 | /* If it is stopped, but we cannot start it, then fail */ |
1238 | if (!UNIT_VTABLE(u)->start) | |
1239 | return -EBADR; | |
1240 | ||
87f0e418 LP |
1241 | /* We don't suppress calls to ->start() here when we are |
1242 | * already starting, to allow this request to be used as a | |
1243 | * "hurry up" call, for example when the unit is in some "auto | |
1244 | * restart" state where it waits for a holdoff timer to elapse | |
1245 | * before it will start again. */ | |
1246 | ||
c1e1601e | 1247 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1248 | |
87f0e418 LP |
1249 | return UNIT_VTABLE(u)->start(u); |
1250 | } | |
1251 | ||
1252 | bool unit_can_start(Unit *u) { | |
1253 | assert(u); | |
1254 | ||
1255 | return !!UNIT_VTABLE(u)->start; | |
1256 | } | |
1257 | ||
2528a7a6 LP |
1258 | bool unit_can_isolate(Unit *u) { |
1259 | assert(u); | |
1260 | ||
1261 | return unit_can_start(u) && | |
ac155bb8 | 1262 | u->allow_isolate; |
2528a7a6 LP |
1263 | } |
1264 | ||
87f0e418 LP |
1265 | /* Errors: |
1266 | * -EBADR: This unit type does not support stopping. | |
1267 | * -EALREADY: Unit is already stopped. | |
1268 | * -EAGAIN: An operation is already in progress. Retry later. | |
1269 | */ | |
1270 | int unit_stop(Unit *u) { | |
1271 | UnitActiveState state; | |
92ab323c | 1272 | Unit *following; |
87f0e418 LP |
1273 | |
1274 | assert(u); | |
1275 | ||
87f0e418 | 1276 | state = unit_active_state(u); |
fdf20a31 | 1277 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1278 | return -EALREADY; |
1279 | ||
92ab323c | 1280 | if ((following = unit_following(u))) { |
c1b6628d ZJS |
1281 | log_debug_unit(u->id, "Redirecting stop request from %s to %s.", |
1282 | u->id, following->id); | |
92ab323c LP |
1283 | return unit_stop(following); |
1284 | } | |
1285 | ||
877d54e9 LP |
1286 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); |
1287 | unit_status_print_starting_stopping(u, JOB_STOP); | |
c6918296 | 1288 | |
7898b0cf LP |
1289 | if (!UNIT_VTABLE(u)->stop) |
1290 | return -EBADR; | |
1291 | ||
c1e1601e | 1292 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1293 | |
87f0e418 LP |
1294 | return UNIT_VTABLE(u)->stop(u); |
1295 | } | |
1296 | ||
1297 | /* Errors: | |
1298 | * -EBADR: This unit type does not support reloading. | |
1299 | * -ENOEXEC: Unit is not started. | |
1300 | * -EAGAIN: An operation is already in progress. Retry later. | |
1301 | */ | |
1302 | int unit_reload(Unit *u) { | |
1303 | UnitActiveState state; | |
92ab323c | 1304 | Unit *following; |
87f0e418 LP |
1305 | |
1306 | assert(u); | |
1307 | ||
ac155bb8 | 1308 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1309 | return -EINVAL; |
1310 | ||
87f0e418 LP |
1311 | if (!unit_can_reload(u)) |
1312 | return -EBADR; | |
1313 | ||
1314 | state = unit_active_state(u); | |
e364ad06 | 1315 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1316 | return -EALREADY; |
1317 | ||
6a371e23 ZJS |
1318 | if (state != UNIT_ACTIVE) { |
1319 | log_warning_unit(u->id, "Unit %s cannot be reloaded because it is inactive.", | |
1320 | u->id); | |
87f0e418 | 1321 | return -ENOEXEC; |
6a371e23 | 1322 | } |
87f0e418 | 1323 | |
e48614c4 ZJS |
1324 | following = unit_following(u); |
1325 | if (following) { | |
c1b6628d ZJS |
1326 | log_debug_unit(u->id, "Redirecting reload request from %s to %s.", |
1327 | u->id, following->id); | |
92ab323c LP |
1328 | return unit_reload(following); |
1329 | } | |
1330 | ||
877d54e9 LP |
1331 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); |
1332 | ||
c1e1601e | 1333 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1334 | return UNIT_VTABLE(u)->reload(u); |
1335 | } | |
1336 | ||
1337 | bool unit_can_reload(Unit *u) { | |
1338 | assert(u); | |
1339 | ||
1340 | if (!UNIT_VTABLE(u)->reload) | |
1341 | return false; | |
1342 | ||
1343 | if (!UNIT_VTABLE(u)->can_reload) | |
1344 | return true; | |
1345 | ||
1346 | return UNIT_VTABLE(u)->can_reload(u); | |
1347 | } | |
1348 | ||
b4a16b7b | 1349 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1350 | Iterator i; |
1351 | Unit *other; | |
1352 | ||
1353 | assert(u); | |
1354 | ||
1355 | /* If this service shall be shut down when unneeded then do | |
1356 | * so. */ | |
1357 | ||
ac155bb8 | 1358 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1359 | return; |
1360 | ||
1361 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1362 | return; | |
1363 | ||
ac155bb8 | 1364 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
31afa0a4 | 1365 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1366 | return; |
1367 | ||
ac155bb8 | 1368 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
31afa0a4 | 1369 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1370 | return; |
1371 | ||
ac155bb8 | 1372 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
31afa0a4 | 1373 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1374 | return; |
1375 | ||
ac155bb8 | 1376 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
31afa0a4 | 1377 | if (unit_active_or_pending(other)) |
b81884e7 LP |
1378 | return; |
1379 | ||
c1b6628d | 1380 | log_info_unit(u->id, "Service %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1381 | |
1382 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1383 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1384 | } |
1385 | ||
87f0e418 LP |
1386 | static void retroactively_start_dependencies(Unit *u) { |
1387 | Iterator i; | |
1388 | Unit *other; | |
1389 | ||
1390 | assert(u); | |
1391 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1392 | ||
ac155bb8 MS |
1393 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1394 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1395 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1396 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1397 | |
7f2cddae | 1398 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1399 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1400 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1401 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1402 | |
ac155bb8 MS |
1403 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1404 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1405 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1406 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1407 | |
ac155bb8 MS |
1408 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1409 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1410 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1411 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1412 | |
ac155bb8 | 1413 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1414 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1415 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1416 | |
ac155bb8 | 1417 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1418 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1419 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1420 | } |
1421 | ||
1422 | static void retroactively_stop_dependencies(Unit *u) { | |
1423 | Iterator i; | |
1424 | Unit *other; | |
1425 | ||
1426 | assert(u); | |
1427 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1428 | ||
b81884e7 | 1429 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1430 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1431 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1432 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1433 | } |
1434 | ||
1435 | static void check_unneeded_dependencies(Unit *u) { | |
1436 | Iterator i; | |
1437 | Unit *other; | |
1438 | ||
1439 | assert(u); | |
1440 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1441 | |
1442 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1443 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1444 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1445 | unit_check_unneeded(other); |
ac155bb8 | 1446 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1447 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1448 | unit_check_unneeded(other); |
ac155bb8 | 1449 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1450 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1451 | unit_check_unneeded(other); |
ac155bb8 | 1452 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1453 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1454 | unit_check_unneeded(other); |
ac155bb8 | 1455 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1456 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1457 | unit_check_unneeded(other); |
7f2cddae | 1458 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1459 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1460 | unit_check_unneeded(other); | |
87f0e418 LP |
1461 | } |
1462 | ||
3ecaa09b | 1463 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1464 | Unit *other; |
1465 | Iterator i; | |
1466 | ||
1467 | assert(u); | |
1468 | ||
ac155bb8 | 1469 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1470 | return; |
1471 | ||
c1b6628d | 1472 | log_info_unit(u->id, "Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1473 | |
ac155bb8 | 1474 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1475 | int r; |
1476 | ||
d420282b | 1477 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d ZJS |
1478 | if (r < 0) |
1479 | log_error_unit(u->id, "Failed to enqueue OnFailure= job: %s", strerror(-r)); | |
222ae6a8 | 1480 | } |
c0daa706 LP |
1481 | } |
1482 | ||
3ecaa09b LP |
1483 | void unit_trigger_notify(Unit *u) { |
1484 | Unit *other; | |
1485 | Iterator i; | |
1486 | ||
1487 | assert(u); | |
1488 | ||
1489 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1490 | if (UNIT_VTABLE(other)->trigger_notify) | |
1491 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1492 | } | |
1493 | ||
e2f3b44c | 1494 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1495 | Manager *m; |
7e6e7b06 | 1496 | bool unexpected; |
a096ed36 | 1497 | |
87f0e418 LP |
1498 | assert(u); |
1499 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1500 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1501 | |
8e471ccd LP |
1502 | /* Note that this is called for all low-level state changes, |
1503 | * even if they might map to the same high-level | |
1504 | * UnitActiveState! That means that ns == os is OK an expected | |
c5315881 | 1505 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1506 | * this function will be called too! */ |
87f0e418 | 1507 | |
546ac4f0 MS |
1508 | m = u->manager; |
1509 | ||
1510 | if (m->n_reloading <= 0) { | |
bdbf9951 | 1511 | dual_timestamp ts; |
173e3821 | 1512 | |
bdbf9951 | 1513 | dual_timestamp_get(&ts); |
173e3821 | 1514 | |
bdbf9951 | 1515 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1516 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1517 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1518 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1519 | |
1520 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1521 | u->active_enter_timestamp = ts; |
bdbf9951 | 1522 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1523 | u->active_exit_timestamp = ts; |
bdbf9951 | 1524 | } |
87f0e418 | 1525 | |
fdf20a31 | 1526 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
4ad49000 | 1527 | unit_destroy_cgroup(u); |
fb385181 | 1528 | |
9cd86184 OB |
1529 | /* Note that this doesn't apply to RemainAfterExit services exiting |
1530 | * sucessfully, since there's no change of state in that case. Which is | |
1531 | * why it is handled in service_set_state() */ | |
7ed9f6cd | 1532 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1533 | ExecContext *ec; |
1534 | ||
1535 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1536 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1537 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1538 | m->n_on_console --; | |
1539 | ||
1540 | if (m->n_on_console == 0) | |
1541 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1542 | m->no_console_output = false; |
31a7eb86 ZJS |
1543 | } else |
1544 | m->n_on_console ++; | |
7ed9f6cd MS |
1545 | } |
1546 | } | |
1547 | ||
ac155bb8 | 1548 | if (u->job) { |
7e6e7b06 | 1549 | unexpected = false; |
87f0e418 | 1550 | |
ac155bb8 | 1551 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1552 | |
1553 | /* So we reached a different state for this | |
1554 | * job. Let's see if we can run it now if it | |
1555 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1556 | job_add_to_run_queue(u->job); |
87f0e418 | 1557 | |
b410e6b9 | 1558 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1559 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1560 | * hence needs to invalidate jobs. */ |
87f0e418 | 1561 | |
ac155bb8 | 1562 | switch (u->job->type) { |
87f0e418 | 1563 | |
b410e6b9 LP |
1564 | case JOB_START: |
1565 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1566 | |
b410e6b9 | 1567 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1568 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1569 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1570 | unexpected = true; |
41b02ec7 | 1571 | |
fdf20a31 | 1572 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1573 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1574 | } |
87f0e418 | 1575 | |
b410e6b9 | 1576 | break; |
87f0e418 | 1577 | |
b410e6b9 LP |
1578 | case JOB_RELOAD: |
1579 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1580 | |
ac155bb8 | 1581 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1582 | if (ns == UNIT_ACTIVE) |
5273510e | 1583 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1584 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1585 | unexpected = true; |
41b02ec7 | 1586 | |
fdf20a31 | 1587 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1588 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1589 | } |
b410e6b9 | 1590 | } |
87f0e418 | 1591 | |
b410e6b9 | 1592 | break; |
87f0e418 | 1593 | |
b410e6b9 LP |
1594 | case JOB_STOP: |
1595 | case JOB_RESTART: | |
1596 | case JOB_TRY_RESTART: | |
87f0e418 | 1597 | |
fdf20a31 | 1598 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1599 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1600 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1601 | unexpected = true; |
5273510e | 1602 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1603 | } |
87f0e418 | 1604 | |
b410e6b9 | 1605 | break; |
87f0e418 | 1606 | |
b410e6b9 LP |
1607 | default: |
1608 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1609 | } |
87f0e418 | 1610 | |
7e6e7b06 LP |
1611 | } else |
1612 | unexpected = true; | |
1613 | ||
546ac4f0 | 1614 | if (m->n_reloading <= 0) { |
f3bff0eb | 1615 | |
bdbf9951 LP |
1616 | /* If this state change happened without being |
1617 | * requested by a job, then let's retroactively start | |
1618 | * or stop dependencies. We skip that step when | |
1619 | * deserializing, since we don't want to create any | |
1620 | * additional jobs just because something is already | |
1621 | * activated. */ | |
1622 | ||
1623 | if (unexpected) { | |
1624 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1625 | retroactively_start_dependencies(u); | |
1626 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1627 | retroactively_stop_dependencies(u); | |
1628 | } | |
5de9682c | 1629 | |
cd0504d0 | 1630 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1631 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1632 | check_unneeded_dependencies(u); |
1633 | ||
bdbf9951 | 1634 | if (ns != os && ns == UNIT_FAILED) { |
b33918c2 | 1635 | log_notice_unit(u->id, "Unit %s entered failed state.", u->id); |
3ecaa09b | 1636 | unit_start_on_failure(u); |
cd6d0a45 | 1637 | } |
3b2775c5 | 1638 | } |
e537352b | 1639 | |
3b2775c5 LP |
1640 | /* Some names are special */ |
1641 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1642 | ||
1643 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1644 | /* The bus just might have become available, | |
1645 | * hence try to connect to it, if we aren't | |
1646 | * yet connected. */ | |
546ac4f0 | 1647 | bus_init(m, true); |
3b2775c5 | 1648 | |
ac155bb8 | 1649 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1650 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1651 | m->n_reloading <= 0) { |
3b2775c5 | 1652 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1653 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1654 | u->in_audit = true; |
3b2775c5 | 1655 | } |
e983b760 | 1656 | |
3b2775c5 | 1657 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1658 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1659 | |
3b2775c5 | 1660 | } else { |
bdbf9951 | 1661 | |
3b2775c5 LP |
1662 | /* We don't care about D-Bus here, since we'll get an |
1663 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1664 | |
ac155bb8 | 1665 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1666 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1667 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1668 | m->n_reloading <= 0) { |
4927fcae | 1669 | |
3b2775c5 LP |
1670 | /* Hmm, if there was no start record written |
1671 | * write it now, so that we always have a nice | |
1672 | * pair */ | |
ac155bb8 | 1673 | if (!u->in_audit) { |
546ac4f0 | 1674 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1675 | |
3b2775c5 | 1676 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1677 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1678 | } else |
1679 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1680 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1681 | |
ac155bb8 | 1682 | u->in_audit = false; |
cd6d0a45 | 1683 | } |
f278026d LP |
1684 | } |
1685 | ||
546ac4f0 | 1686 | manager_recheck_journal(m); |
3ecaa09b | 1687 | unit_trigger_notify(u); |
3b2775c5 | 1688 | |
f3bff0eb LP |
1689 | /* Maybe we finished startup and are now ready for being |
1690 | * stopped because unneeded? */ | |
bf6dcfa6 OS |
1691 | if (u->manager->n_reloading <= 0) |
1692 | unit_check_unneeded(u); | |
c1e1601e LP |
1693 | |
1694 | unit_add_to_dbus_queue(u); | |
701cc384 | 1695 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1696 | } |
1697 | ||
87f0e418 | 1698 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
1699 | int q, r; |
1700 | ||
87f0e418 LP |
1701 | assert(u); |
1702 | assert(pid >= 1); | |
1703 | ||
5ba6985b LP |
1704 | /* Watch a specific PID. We only support one or two units |
1705 | * watching each PID for now, not more. */ | |
1706 | ||
bd44e61b | 1707 | r = set_ensure_allocated(&u->pids, trivial_hash_func, trivial_compare_func); |
5ba6985b LP |
1708 | if (r < 0) |
1709 | return r; | |
1710 | ||
bd44e61b | 1711 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, trivial_hash_func, trivial_compare_func); |
a911bb9a LP |
1712 | if (r < 0) |
1713 | return r; | |
1714 | ||
5ba6985b LP |
1715 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
1716 | if (r == -EEXIST) { | |
1717 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, trivial_hash_func, trivial_compare_func); | |
1718 | if (r < 0) | |
1719 | return r; | |
05e343b7 | 1720 | |
5ba6985b LP |
1721 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
1722 | } | |
a911bb9a | 1723 | |
5ba6985b | 1724 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
a911bb9a LP |
1725 | if (q < 0) |
1726 | return q; | |
1727 | ||
1728 | return r; | |
87f0e418 LP |
1729 | } |
1730 | ||
1731 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1732 | assert(u); | |
1733 | assert(pid >= 1); | |
1734 | ||
5ba6985b LP |
1735 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
1736 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
a911bb9a LP |
1737 | set_remove(u->pids, LONG_TO_PTR(pid)); |
1738 | } | |
1739 | ||
bd44e61b LP |
1740 | void unit_unwatch_all_pids(Unit *u) { |
1741 | assert(u); | |
1742 | ||
1743 | while (!set_isempty(u->pids)) | |
1744 | unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids))); | |
1745 | ||
1746 | set_free(u->pids); | |
1747 | u->pids = NULL; | |
1748 | } | |
1749 | ||
1750 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
a911bb9a LP |
1751 | _cleanup_closedir_ DIR *d = NULL; |
1752 | _cleanup_fclose_ FILE *f = NULL; | |
1753 | int ret = 0, r; | |
1754 | ||
1755 | assert(u); | |
1756 | assert(path); | |
1757 | ||
1758 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ | |
1759 | ||
1760 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
1761 | if (r >= 0) { | |
1762 | pid_t pid; | |
1763 | ||
1764 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
1765 | r = unit_watch_pid(u, pid); | |
1766 | if (r < 0 && ret >= 0) | |
1767 | ret = r; | |
1768 | } | |
1769 | if (r < 0 && ret >= 0) | |
1770 | ret = r; | |
1771 | ||
1772 | } else if (ret >= 0) | |
1773 | ret = r; | |
1774 | ||
1775 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
1776 | if (r >= 0) { | |
1777 | char *fn; | |
1778 | ||
1779 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
1780 | _cleanup_free_ char *p = NULL; | |
1781 | ||
1782 | p = strjoin(path, "/", fn, NULL); | |
1783 | free(fn); | |
1784 | ||
1785 | if (!p) | |
1786 | return -ENOMEM; | |
1787 | ||
bd44e61b | 1788 | r = unit_watch_pids_in_path(u, p); |
a911bb9a LP |
1789 | if (r < 0 && ret >= 0) |
1790 | ret = r; | |
1791 | } | |
1792 | if (r < 0 && ret >= 0) | |
1793 | ret = r; | |
1794 | ||
1795 | } else if (ret >= 0) | |
1796 | ret = r; | |
1797 | ||
1798 | return ret; | |
1799 | } | |
1800 | ||
a911bb9a LP |
1801 | int unit_watch_all_pids(Unit *u) { |
1802 | assert(u); | |
1803 | ||
a911bb9a LP |
1804 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ |
1805 | ||
bd44e61b LP |
1806 | if (!u->cgroup_path) |
1807 | return -ENOENT; | |
a911bb9a | 1808 | |
bd44e61b | 1809 | return unit_watch_pids_in_path(u, u->cgroup_path); |
a911bb9a LP |
1810 | } |
1811 | ||
1812 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
1813 | Iterator i; | |
1814 | void *e; | |
1815 | ||
1816 | assert(u); | |
1817 | ||
1818 | /* Cleans dead PIDs from our list */ | |
1819 | ||
1820 | SET_FOREACH(e, u->pids, i) { | |
1821 | pid_t pid = PTR_TO_LONG(e); | |
1822 | ||
1823 | if (pid == except1 || pid == except2) | |
1824 | continue; | |
1825 | ||
9f5650ae | 1826 | if (!pid_is_unwaited(pid)) |
bd44e61b | 1827 | unit_unwatch_pid(u, pid); |
a911bb9a | 1828 | } |
87f0e418 LP |
1829 | } |
1830 | ||
87f0e418 LP |
1831 | bool unit_job_is_applicable(Unit *u, JobType j) { |
1832 | assert(u); | |
1833 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1834 | ||
1835 | switch (j) { | |
1836 | ||
1837 | case JOB_VERIFY_ACTIVE: | |
1838 | case JOB_START: | |
57339f47 | 1839 | case JOB_STOP: |
e0209d83 | 1840 | case JOB_NOP: |
87f0e418 LP |
1841 | return true; |
1842 | ||
87f0e418 LP |
1843 | case JOB_RESTART: |
1844 | case JOB_TRY_RESTART: | |
1845 | return unit_can_start(u); | |
1846 | ||
1847 | case JOB_RELOAD: | |
1848 | return unit_can_reload(u); | |
1849 | ||
1850 | case JOB_RELOAD_OR_START: | |
1851 | return unit_can_reload(u) && unit_can_start(u); | |
1852 | ||
1853 | default: | |
1854 | assert_not_reached("Invalid job type"); | |
1855 | } | |
1856 | } | |
1857 | ||
701cc384 | 1858 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1859 | |
1860 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1861 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1862 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1863 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1864 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1865 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 1866 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 1867 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 1868 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1869 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1870 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 1871 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 1872 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
1873 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1874 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1875 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1876 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1877 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 1878 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
1879 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
1880 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 1881 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 1882 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 1883 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 1884 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 1885 | }; |
701cc384 | 1886 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1887 | |
1888 | assert(u); | |
1889 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1890 | assert(other); |
1891 | ||
9f151f29 LP |
1892 | u = unit_follow_merge(u); |
1893 | other = unit_follow_merge(other); | |
1894 | ||
87f0e418 LP |
1895 | /* We won't allow dependencies on ourselves. We will not |
1896 | * consider them an error however. */ | |
1897 | if (u == other) | |
1898 | return 0; | |
1899 | ||
613b411c LP |
1900 | r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func); |
1901 | if (r < 0) | |
87f0e418 LP |
1902 | return r; |
1903 | ||
613b411c LP |
1904 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
1905 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func); | |
1906 | if (r < 0) | |
1907 | return r; | |
1908 | } | |
1909 | ||
1910 | if (add_reference) { | |
1911 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func); | |
1912 | if (r < 0) | |
5de9682c LP |
1913 | return r; |
1914 | ||
613b411c LP |
1915 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func); |
1916 | if (r < 0) | |
701cc384 | 1917 | return r; |
613b411c | 1918 | } |
87f0e418 | 1919 | |
613b411c LP |
1920 | q = set_put(u->dependencies[d], other); |
1921 | if (q < 0) | |
701cc384 | 1922 | return q; |
87f0e418 | 1923 | |
613b411c LP |
1924 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
1925 | v = set_put(other->dependencies[inverse_table[d]], u); | |
1926 | if (v < 0) { | |
5de9682c LP |
1927 | r = v; |
1928 | goto fail; | |
1929 | } | |
613b411c | 1930 | } |
701cc384 LP |
1931 | |
1932 | if (add_reference) { | |
613b411c LP |
1933 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
1934 | if (w < 0) { | |
701cc384 LP |
1935 | r = w; |
1936 | goto fail; | |
1937 | } | |
1938 | ||
613b411c LP |
1939 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
1940 | if (r < 0) | |
701cc384 | 1941 | goto fail; |
87f0e418 LP |
1942 | } |
1943 | ||
c1e1601e | 1944 | unit_add_to_dbus_queue(u); |
87f0e418 | 1945 | return 0; |
701cc384 LP |
1946 | |
1947 | fail: | |
1948 | if (q > 0) | |
ac155bb8 | 1949 | set_remove(u->dependencies[d], other); |
701cc384 LP |
1950 | |
1951 | if (v > 0) | |
ac155bb8 | 1952 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
1953 | |
1954 | if (w > 0) | |
ac155bb8 | 1955 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
1956 | |
1957 | return r; | |
87f0e418 | 1958 | } |
0301abf4 | 1959 | |
2c966c03 LP |
1960 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1961 | int r; | |
1962 | ||
1963 | assert(u); | |
1964 | ||
1965 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1966 | return r; | |
1967 | ||
1968 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1969 | return r; | |
1970 | ||
1971 | return 0; | |
1972 | } | |
1973 | ||
9e2f7c11 LP |
1974 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1975 | char *s; | |
1976 | ||
1977 | assert(u); | |
1978 | assert(name || path); | |
8afbb8e1 | 1979 | assert(p); |
9e2f7c11 LP |
1980 | |
1981 | if (!name) | |
2b6bf07d | 1982 | name = basename(path); |
9e2f7c11 LP |
1983 | |
1984 | if (!unit_name_is_template(name)) { | |
1985 | *p = NULL; | |
1986 | return name; | |
1987 | } | |
1988 | ||
ac155bb8 MS |
1989 | if (u->instance) |
1990 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 | 1991 | else { |
ae018d9b | 1992 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 1993 | |
8afbb8e1 LP |
1994 | i = unit_name_to_prefix(u->id); |
1995 | if (!i) | |
9e2f7c11 LP |
1996 | return NULL; |
1997 | ||
1998 | s = unit_name_replace_instance(name, i); | |
9e2f7c11 LP |
1999 | } |
2000 | ||
2001 | if (!s) | |
2002 | return NULL; | |
2003 | ||
2004 | *p = s; | |
2005 | return s; | |
2006 | } | |
2007 | ||
701cc384 | 2008 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
2009 | Unit *other; |
2010 | int r; | |
8afbb8e1 | 2011 | _cleanup_free_ char *s = NULL; |
09b6b09f | 2012 | |
9e2f7c11 LP |
2013 | assert(u); |
2014 | assert(name || path); | |
09b6b09f | 2015 | |
8afbb8e1 LP |
2016 | name = resolve_template(u, name, path, &s); |
2017 | if (!name) | |
9e2f7c11 | 2018 | return -ENOMEM; |
09b6b09f | 2019 | |
8afbb8e1 LP |
2020 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2021 | if (r < 0) | |
2022 | return r; | |
9e2f7c11 | 2023 | |
8afbb8e1 | 2024 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2025 | } |
2026 | ||
2c966c03 LP |
2027 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2028 | Unit *other; | |
2029 | int r; | |
68eda4bd | 2030 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2031 | |
2032 | assert(u); | |
2033 | assert(name || path); | |
2034 | ||
2035 | if (!(name = resolve_template(u, name, path, &s))) | |
2036 | return -ENOMEM; | |
2037 | ||
ac155bb8 | 2038 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
68eda4bd | 2039 | return r; |
2c966c03 LP |
2040 | |
2041 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
2042 | ||
2c966c03 LP |
2043 | return r; |
2044 | } | |
2045 | ||
701cc384 | 2046 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
2047 | Unit *other; |
2048 | int r; | |
68eda4bd | 2049 | _cleanup_free_ char *s = NULL; |
bd77d0fc | 2050 | |
9e2f7c11 LP |
2051 | assert(u); |
2052 | assert(name || path); | |
bd77d0fc | 2053 | |
9e2f7c11 LP |
2054 | if (!(name = resolve_template(u, name, path, &s))) |
2055 | return -ENOMEM; | |
bd77d0fc | 2056 | |
ac155bb8 | 2057 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
68eda4bd | 2058 | return r; |
9e2f7c11 | 2059 | |
701cc384 | 2060 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 | 2061 | |
9e2f7c11 | 2062 | return r; |
bd77d0fc LP |
2063 | } |
2064 | ||
2c966c03 LP |
2065 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2066 | Unit *other; | |
2067 | int r; | |
68eda4bd | 2068 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2069 | |
2070 | assert(u); | |
2071 | assert(name || path); | |
2072 | ||
2073 | if (!(name = resolve_template(u, name, path, &s))) | |
2074 | return -ENOMEM; | |
2075 | ||
ac155bb8 | 2076 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
68eda4bd | 2077 | return r; |
2c966c03 LP |
2078 | |
2079 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
68eda4bd | 2080 | return r; |
2c966c03 | 2081 | |
2c966c03 LP |
2082 | return r; |
2083 | } | |
2084 | ||
0301abf4 | 2085 | int set_unit_path(const char *p) { |
26d04f86 | 2086 | _cleanup_free_ char *c = NULL; |
0301abf4 LP |
2087 | |
2088 | /* This is mostly for debug purposes */ | |
26d04f86 LP |
2089 | c = path_make_absolute_cwd(p); |
2090 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) | |
2091 | return -errno; | |
0301abf4 LP |
2092 | |
2093 | return 0; | |
2094 | } | |
88066b3a | 2095 | |
ea430986 | 2096 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2097 | assert(u); |
2098 | ||
ac155bb8 | 2099 | if (!u->id) |
04ade7d2 LP |
2100 | return NULL; |
2101 | ||
48899192 | 2102 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2103 | } |
2104 | ||
41f9172f | 2105 | char *unit_default_cgroup_path(Unit *u) { |
d7bd3de0 | 2106 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
a016b922 | 2107 | int r; |
5954c074 | 2108 | |
013b87c0 LP |
2109 | assert(u); |
2110 | ||
4ad49000 LP |
2111 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2112 | return strdup(u->manager->cgroup_root); | |
2113 | ||
2114 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2115 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2116 | if (r < 0) | |
2117 | return NULL; | |
2118 | } | |
2119 | ||
d7bd3de0 LP |
2120 | escaped = cg_escape(u->id); |
2121 | if (!escaped) | |
5954c074 LP |
2122 | return NULL; |
2123 | ||
d7bd3de0 LP |
2124 | if (slice) |
2125 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2126 | else | |
2127 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
013b87c0 LP |
2128 | } |
2129 | ||
a016b922 | 2130 | int unit_add_default_slice(Unit *u) { |
a8833944 LP |
2131 | _cleanup_free_ char *b = NULL; |
2132 | const char *slice_name; | |
a016b922 LP |
2133 | Unit *slice; |
2134 | int r; | |
2135 | ||
2136 | assert(u); | |
2137 | ||
9444b1f2 | 2138 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2139 | return 0; |
2140 | ||
4ad49000 | 2141 | if (!unit_get_cgroup_context(u)) |
a016b922 LP |
2142 | return 0; |
2143 | ||
a8833944 LP |
2144 | if (u->instance) { |
2145 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2146 | |
a8833944 LP |
2147 | /* Implicitly place all instantiated units in their |
2148 | * own per-template slice */ | |
2149 | ||
2150 | prefix = unit_name_to_prefix(u->id); | |
2151 | if (!prefix) | |
2152 | return -ENOMEM; | |
2153 | ||
2154 | /* The prefix is already escaped, but it might include | |
2155 | * "-" which has a special meaning for slice units, | |
2156 | * hence escape it here extra. */ | |
2157 | escaped = strreplace(prefix, "-", "\\x2d"); | |
2158 | if (!escaped) | |
2159 | return -ENOMEM; | |
2160 | ||
2161 | if (u->manager->running_as == SYSTEMD_SYSTEM) | |
2162 | b = strjoin("system-", escaped, ".slice", NULL); | |
2163 | else | |
2164 | b = strappend(escaped, ".slice"); | |
2165 | if (!b) | |
2166 | return -ENOMEM; | |
2167 | ||
2168 | slice_name = b; | |
2169 | } else | |
2170 | slice_name = | |
2171 | u->manager->running_as == SYSTEMD_SYSTEM | |
2172 | ? SPECIAL_SYSTEM_SLICE | |
2173 | : SPECIAL_ROOT_SLICE; | |
2174 | ||
2175 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2176 | if (r < 0) |
2177 | return r; | |
2178 | ||
2179 | unit_ref_set(&u->slice, slice); | |
2180 | return 0; | |
2181 | } | |
2182 | ||
9444b1f2 LP |
2183 | const char *unit_slice_name(Unit *u) { |
2184 | assert(u); | |
2185 | ||
2186 | if (!UNIT_ISSET(u->slice)) | |
2187 | return NULL; | |
2188 | ||
2189 | return UNIT_DEREF(u->slice)->id; | |
2190 | } | |
2191 | ||
f6ff8c29 | 2192 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2193 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2194 | int r; |
2195 | ||
2196 | assert(u); | |
2197 | assert(type); | |
2198 | assert(_found); | |
2199 | ||
78edb35a LP |
2200 | t = unit_name_change_suffix(u->id, type); |
2201 | if (!t) | |
f6ff8c29 LP |
2202 | return -ENOMEM; |
2203 | ||
2204 | assert(!unit_has_name(u, t)); | |
2205 | ||
ac155bb8 | 2206 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2207 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2208 | return r; |
2209 | } | |
2210 | ||
05e343b7 LP |
2211 | int unit_watch_bus_name(Unit *u, const char *name) { |
2212 | assert(u); | |
2213 | assert(name); | |
2214 | ||
2215 | /* Watch a specific name on the bus. We only support one unit | |
2216 | * watching each name for now. */ | |
2217 | ||
ac155bb8 | 2218 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2219 | } |
2220 | ||
2221 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2222 | assert(u); | |
2223 | assert(name); | |
2224 | ||
ac155bb8 | 2225 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2226 | } |
2227 | ||
a16e1123 LP |
2228 | bool unit_can_serialize(Unit *u) { |
2229 | assert(u); | |
2230 | ||
2231 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2232 | } | |
2233 | ||
6b78f9b4 | 2234 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
613b411c | 2235 | ExecRuntime *rt; |
a16e1123 LP |
2236 | int r; |
2237 | ||
2238 | assert(u); | |
2239 | assert(f); | |
2240 | assert(fds); | |
2241 | ||
2242 | if (!unit_can_serialize(u)) | |
2243 | return 0; | |
2244 | ||
6fa48533 LP |
2245 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
2246 | if (r < 0) | |
a16e1123 LP |
2247 | return r; |
2248 | ||
613b411c LP |
2249 | rt = unit_get_exec_runtime(u); |
2250 | if (rt) { | |
2251 | r = exec_runtime_serialize(rt, u, f, fds); | |
2252 | if (r < 0) | |
2253 | return r; | |
e0209d83 MS |
2254 | } |
2255 | ||
ac155bb8 MS |
2256 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2257 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2258 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2259 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2260 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
2791a8f8 | 2261 | |
ac155bb8 MS |
2262 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2263 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2264 | |
c2756a68 LP |
2265 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
2266 | ||
2267 | if (u->cgroup_path) | |
2268 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
2269 | ||
613b411c LP |
2270 | if (serialize_jobs) { |
2271 | if (u->job) { | |
2272 | fprintf(f, "job\n"); | |
2273 | job_serialize(u->job, f, fds); | |
2274 | } | |
2275 | ||
2276 | if (u->nop_job) { | |
2277 | fprintf(f, "job\n"); | |
2278 | job_serialize(u->nop_job, f, fds); | |
2279 | } | |
2280 | } | |
2281 | ||
a16e1123 LP |
2282 | /* End marker */ |
2283 | fputc('\n', f); | |
2284 | return 0; | |
2285 | } | |
2286 | ||
2287 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2288 | va_list ap; | |
2289 | ||
2290 | assert(u); | |
2291 | assert(f); | |
2292 | assert(key); | |
2293 | assert(format); | |
2294 | ||
2295 | fputs(key, f); | |
2296 | fputc('=', f); | |
2297 | ||
2298 | va_start(ap, format); | |
2299 | vfprintf(f, format, ap); | |
2300 | va_end(ap); | |
2301 | ||
2302 | fputc('\n', f); | |
2303 | } | |
2304 | ||
2305 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2306 | assert(u); | |
2307 | assert(f); | |
2308 | assert(key); | |
2309 | assert(value); | |
2310 | ||
2311 | fprintf(f, "%s=%s\n", key, value); | |
2312 | } | |
2313 | ||
2314 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
613b411c | 2315 | size_t offset; |
28b99ccd | 2316 | ExecRuntime **rt = NULL; |
a16e1123 LP |
2317 | int r; |
2318 | ||
2319 | assert(u); | |
2320 | assert(f); | |
2321 | assert(fds); | |
2322 | ||
2323 | if (!unit_can_serialize(u)) | |
2324 | return 0; | |
2325 | ||
613b411c LP |
2326 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2327 | if (offset > 0) | |
2328 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2329 | ||
a16e1123 | 2330 | for (;;) { |
20c03b7b | 2331 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2332 | size_t k; |
2333 | ||
2334 | if (!fgets(line, sizeof(line), f)) { | |
2335 | if (feof(f)) | |
2336 | return 0; | |
2337 | return -errno; | |
2338 | } | |
2339 | ||
10f8e83c | 2340 | char_array_0(line); |
a16e1123 LP |
2341 | l = strstrip(line); |
2342 | ||
2343 | /* End marker */ | |
2344 | if (l[0] == 0) | |
2345 | return 0; | |
2346 | ||
2347 | k = strcspn(l, "="); | |
2348 | ||
2349 | if (l[k] == '=') { | |
2350 | l[k] = 0; | |
2351 | v = l+k+1; | |
2352 | } else | |
2353 | v = l+k; | |
2354 | ||
cca098b0 | 2355 | if (streq(l, "job")) { |
39a18c60 MS |
2356 | if (v[0] == '\0') { |
2357 | /* new-style serialized job */ | |
2358 | Job *j = job_new_raw(u); | |
2359 | if (!j) | |
2360 | return -ENOMEM; | |
2361 | ||
2362 | r = job_deserialize(j, f, fds); | |
2363 | if (r < 0) { | |
2364 | job_free(j); | |
2365 | return r; | |
2366 | } | |
cca098b0 | 2367 | |
39a18c60 MS |
2368 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2369 | if (r < 0) { | |
2370 | job_free(j); | |
2371 | return r; | |
2372 | } | |
e0209d83 MS |
2373 | |
2374 | r = job_install_deserialized(j); | |
2375 | if (r < 0) { | |
2376 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2377 | job_free(j); | |
2378 | return r; | |
2379 | } | |
6b19ad24 MS |
2380 | |
2381 | if (j->state == JOB_RUNNING) | |
2382 | u->manager->n_running_jobs++; | |
39a18c60 MS |
2383 | } else { |
2384 | /* legacy */ | |
2385 | JobType type = job_type_from_string(v); | |
2386 | if (type < 0) | |
2387 | log_debug("Failed to parse job type value %s", v); | |
2388 | else | |
2389 | u->deserialized_job = type; | |
2390 | } | |
cca098b0 | 2391 | continue; |
8aaf019b | 2392 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2393 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2394 | continue; |
2395 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2396 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2397 | continue; |
2398 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2399 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2400 | continue; |
2401 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2402 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2403 | continue; |
2791a8f8 | 2404 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2405 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 LP |
2406 | continue; |
2407 | } else if (streq(l, "condition-result")) { | |
2408 | int b; | |
2409 | ||
c2756a68 LP |
2410 | b = parse_boolean(v); |
2411 | if (b < 0) | |
2791a8f8 LP |
2412 | log_debug("Failed to parse condition result value %s", v); |
2413 | else | |
ac155bb8 | 2414 | u->condition_result = b; |
efbac6d2 LP |
2415 | |
2416 | continue; | |
c2756a68 LP |
2417 | |
2418 | } else if (streq(l, "transient")) { | |
2419 | int b; | |
2420 | ||
2421 | b = parse_boolean(v); | |
2422 | if (b < 0) | |
2423 | log_debug("Failed to parse transient bool %s", v); | |
2424 | else | |
2425 | u->transient = b; | |
2426 | ||
2427 | continue; | |
2428 | } else if (streq(l, "cgroup")) { | |
2429 | char *s; | |
2430 | ||
2431 | s = strdup(v); | |
f440e1bb | 2432 | if (!s) |
c2756a68 LP |
2433 | return -ENOMEM; |
2434 | ||
2435 | free(u->cgroup_path); | |
2436 | u->cgroup_path = s; | |
72673e86 | 2437 | |
b58b8e11 | 2438 | assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1); |
c2756a68 | 2439 | continue; |
8aaf019b | 2440 | } |
cca098b0 | 2441 | |
613b411c LP |
2442 | if (rt) { |
2443 | r = exec_runtime_deserialize_item(rt, u, l, v, fds); | |
2444 | if (r < 0) | |
2445 | return r; | |
2446 | if (r > 0) | |
2447 | continue; | |
2448 | } | |
2449 | ||
c2756a68 LP |
2450 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
2451 | if (r < 0) | |
a16e1123 LP |
2452 | return r; |
2453 | } | |
2454 | } | |
2455 | ||
6e2ef85b LP |
2456 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2457 | Unit *device; | |
68eda4bd | 2458 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2459 | int r; |
2460 | ||
2461 | assert(u); | |
2462 | ||
2463 | if (!what) | |
2464 | return 0; | |
2465 | ||
2466 | /* Adds in links to the device node that this unit is based on */ | |
2467 | ||
8407a5d0 | 2468 | if (!is_device_path(what)) |
6e2ef85b LP |
2469 | return 0; |
2470 | ||
35eb6b12 LP |
2471 | e = unit_name_from_path(what, ".device"); |
2472 | if (!e) | |
6e2ef85b LP |
2473 | return -ENOMEM; |
2474 | ||
ac155bb8 | 2475 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
68eda4bd | 2476 | |
6e2ef85b LP |
2477 | if (r < 0) |
2478 | return r; | |
2479 | ||
faa368e3 LP |
2480 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true); |
2481 | if (r < 0) | |
6e2ef85b LP |
2482 | return r; |
2483 | ||
faa368e3 LP |
2484 | if (wants) { |
2485 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2486 | if (r < 0) | |
6e2ef85b | 2487 | return r; |
faa368e3 | 2488 | } |
6e2ef85b LP |
2489 | |
2490 | return 0; | |
2491 | } | |
a16e1123 | 2492 | |
cca098b0 LP |
2493 | int unit_coldplug(Unit *u) { |
2494 | int r; | |
2495 | ||
2496 | assert(u); | |
2497 | ||
2498 | if (UNIT_VTABLE(u)->coldplug) | |
2499 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2500 | return r; | |
2501 | ||
39a18c60 MS |
2502 | if (u->job) { |
2503 | r = job_coldplug(u->job); | |
2504 | if (r < 0) | |
2505 | return r; | |
2506 | } else if (u->deserialized_job >= 0) { | |
2507 | /* legacy */ | |
2508 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2509 | if (r < 0) | |
cca098b0 LP |
2510 | return r; |
2511 | ||
ac155bb8 | 2512 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2513 | } |
2514 | ||
2515 | return 0; | |
2516 | } | |
2517 | ||
49b1d377 | 2518 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2519 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 2520 | manager_status_printf(u->manager, false, status, unit_status_msg_format, unit_description(u)); |
bcfce235 | 2521 | REENABLE_WARNING; |
49b1d377 MS |
2522 | } |
2523 | ||
45fb0699 | 2524 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2525 | _cleanup_strv_free_ char **t = NULL; |
2526 | char **path; | |
1b64d026 | 2527 | struct stat st; |
ae7a7182 | 2528 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2529 | |
45fb0699 LP |
2530 | assert(u); |
2531 | ||
ac155bb8 | 2532 | if (u->fragment_path) { |
5f4b19f4 | 2533 | zero(st); |
ac155bb8 | 2534 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2535 | /* What, cannot access this anymore? */ |
2536 | return true; | |
45fb0699 | 2537 | |
ac155bb8 MS |
2538 | if (u->fragment_mtime > 0 && |
2539 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2540 | return true; |
2541 | } | |
2542 | ||
1b64d026 LP |
2543 | if (u->source_path) { |
2544 | zero(st); | |
2545 | if (stat(u->source_path, &st) < 0) | |
2546 | return true; | |
2547 | ||
2548 | if (u->source_mtime > 0 && | |
2549 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2550 | return true; | |
2551 | } | |
5f4b19f4 | 2552 | |
ae7a7182 OS |
2553 | t = unit_find_dropin_paths(u); |
2554 | loaded_cnt = strv_length(t); | |
2555 | current_cnt = strv_length(u->dropin_paths); | |
2556 | ||
2557 | if (loaded_cnt == current_cnt) { | |
2558 | if (loaded_cnt == 0) | |
2559 | return false; | |
2560 | ||
2561 | if (strv_overlap(u->dropin_paths, t)) { | |
2562 | STRV_FOREACH(path, u->dropin_paths) { | |
2563 | zero(st); | |
2564 | if (stat(*path, &st) < 0) | |
2565 | return true; | |
2566 | ||
2567 | if (u->dropin_mtime > 0 && | |
2568 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2569 | return true; | |
2570 | } | |
2571 | ||
2572 | return false; | |
2573 | } else | |
2574 | return true; | |
2575 | } else | |
2576 | return true; | |
45fb0699 LP |
2577 | } |
2578 | ||
fdf20a31 | 2579 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2580 | assert(u); |
2581 | ||
fdf20a31 MM |
2582 | if (UNIT_VTABLE(u)->reset_failed) |
2583 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2584 | } |
2585 | ||
a7f241db LP |
2586 | Unit *unit_following(Unit *u) { |
2587 | assert(u); | |
2588 | ||
2589 | if (UNIT_VTABLE(u)->following) | |
2590 | return UNIT_VTABLE(u)->following(u); | |
2591 | ||
2592 | return NULL; | |
2593 | } | |
2594 | ||
31afa0a4 | 2595 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2596 | assert(u); |
2597 | ||
31afa0a4 LP |
2598 | /* This call does check the current state of the unit. It's |
2599 | * hence useful to be called from state change calls of the | |
2600 | * unit itself, where the state isn't updated yet. This is | |
2601 | * different from unit_inactive_or_pending() which checks both | |
2602 | * the current state and for a queued job. */ | |
18ffdfda | 2603 | |
31afa0a4 LP |
2604 | return u->job && u->job->type == JOB_STOP; |
2605 | } | |
2606 | ||
2607 | bool unit_inactive_or_pending(Unit *u) { | |
2608 | assert(u); | |
2609 | ||
2610 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 2611 | |
d956ac29 LP |
2612 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
2613 | return true; | |
2614 | ||
31afa0a4 | 2615 | if (unit_stop_pending(u)) |
18ffdfda LP |
2616 | return true; |
2617 | ||
2618 | return false; | |
2619 | } | |
2620 | ||
31afa0a4 | 2621 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
2622 | assert(u); |
2623 | ||
f60c2665 | 2624 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2625 | |
2626 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2627 | return true; | |
2628 | ||
ac155bb8 MS |
2629 | if (u->job && |
2630 | (u->job->type == JOB_START || | |
2631 | u->job->type == JOB_RELOAD_OR_START || | |
2632 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2633 | return true; |
2634 | ||
2635 | return false; | |
2636 | } | |
2637 | ||
718db961 | 2638 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
2639 | assert(u); |
2640 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2641 | assert(signo > 0); |
2642 | assert(signo < _NSIG); | |
2643 | ||
8a0867d6 LP |
2644 | if (!UNIT_VTABLE(u)->kill) |
2645 | return -ENOTSUP; | |
2646 | ||
c74f17d9 | 2647 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2648 | } |
2649 | ||
82659fd7 LP |
2650 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
2651 | Set *pid_set; | |
2652 | int r; | |
2653 | ||
2654 | pid_set = set_new(trivial_hash_func, trivial_compare_func); | |
2655 | if (!pid_set) | |
2656 | return NULL; | |
2657 | ||
2658 | /* Exclude the main/control pids from being killed via the cgroup */ | |
2659 | if (main_pid > 0) { | |
2660 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
2661 | if (r < 0) | |
2662 | goto fail; | |
2663 | } | |
2664 | ||
2665 | if (control_pid > 0) { | |
2666 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
2667 | if (r < 0) | |
2668 | goto fail; | |
2669 | } | |
2670 | ||
2671 | return pid_set; | |
2672 | ||
2673 | fail: | |
2674 | set_free(pid_set); | |
2675 | return NULL; | |
2676 | } | |
2677 | ||
d91c34f2 LP |
2678 | int unit_kill_common( |
2679 | Unit *u, | |
2680 | KillWho who, | |
2681 | int signo, | |
2682 | pid_t main_pid, | |
2683 | pid_t control_pid, | |
718db961 | 2684 | sd_bus_error *error) { |
d91c34f2 | 2685 | |
814cc562 MS |
2686 | int r = 0; |
2687 | ||
2688 | if (who == KILL_MAIN && main_pid <= 0) { | |
2689 | if (main_pid < 0) | |
718db961 | 2690 | sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
814cc562 | 2691 | else |
718db961 | 2692 | sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
2693 | return -ESRCH; |
2694 | } | |
2695 | ||
2696 | if (who == KILL_CONTROL && control_pid <= 0) { | |
2697 | if (control_pid < 0) | |
718db961 | 2698 | sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
814cc562 | 2699 | else |
718db961 | 2700 | sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
2701 | return -ESRCH; |
2702 | } | |
2703 | ||
2704 | if (who == KILL_CONTROL || who == KILL_ALL) | |
2705 | if (control_pid > 0) | |
2706 | if (kill(control_pid, signo) < 0) | |
2707 | r = -errno; | |
2708 | ||
2709 | if (who == KILL_MAIN || who == KILL_ALL) | |
2710 | if (main_pid > 0) | |
2711 | if (kill(main_pid, signo) < 0) | |
2712 | r = -errno; | |
2713 | ||
4ad49000 | 2714 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
2715 | _cleanup_set_free_ Set *pid_set = NULL; |
2716 | int q; | |
2717 | ||
82659fd7 LP |
2718 | /* Exclude the main/control pids from being killed via the cgroup */ |
2719 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
2720 | if (!pid_set) |
2721 | return -ENOMEM; | |
2722 | ||
4ad49000 | 2723 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
2724 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
2725 | r = q; | |
2726 | } | |
2727 | ||
2728 | return r; | |
2729 | } | |
2730 | ||
6210e7fc LP |
2731 | int unit_following_set(Unit *u, Set **s) { |
2732 | assert(u); | |
2733 | assert(s); | |
2734 | ||
2735 | if (UNIT_VTABLE(u)->following_set) | |
2736 | return UNIT_VTABLE(u)->following_set(u, s); | |
2737 | ||
2738 | *s = NULL; | |
2739 | return 0; | |
2740 | } | |
2741 | ||
a4375746 LP |
2742 | UnitFileState unit_get_unit_file_state(Unit *u) { |
2743 | assert(u); | |
2744 | ||
ac155bb8 MS |
2745 | if (u->unit_file_state < 0 && u->fragment_path) |
2746 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 2747 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 2748 | NULL, basename(u->fragment_path)); |
a4375746 | 2749 | |
ac155bb8 | 2750 | return u->unit_file_state; |
a4375746 LP |
2751 | } |
2752 | ||
57020a3a LP |
2753 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
2754 | assert(ref); | |
2755 | assert(u); | |
2756 | ||
2757 | if (ref->unit) | |
2758 | unit_ref_unset(ref); | |
2759 | ||
2760 | ref->unit = u; | |
71fda00f | 2761 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
2762 | return u; |
2763 | } | |
2764 | ||
2765 | void unit_ref_unset(UnitRef *ref) { | |
2766 | assert(ref); | |
2767 | ||
2768 | if (!ref->unit) | |
2769 | return; | |
2770 | ||
71fda00f | 2771 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
2772 | ref->unit = NULL; |
2773 | } | |
2774 | ||
085afe36 LP |
2775 | int unit_cgroup_context_init_defaults(Unit *u, CGroupContext *c) { |
2776 | assert(u); | |
2777 | assert(c); | |
2778 | ||
2779 | /* Copy in the manager defaults into the cgroup context, | |
2780 | * _before_ the rest of the settings have been initialized */ | |
2781 | ||
2782 | c->cpu_accounting = u->manager->default_cpu_accounting; | |
2783 | c->blockio_accounting = u->manager->default_blockio_accounting; | |
2784 | c->memory_accounting = u->manager->default_memory_accounting; | |
2785 | ||
2786 | return 0; | |
2787 | } | |
2788 | ||
2789 | int unit_exec_context_patch_defaults(Unit *u, ExecContext *c) { | |
cba6e062 LP |
2790 | unsigned i; |
2791 | int r; | |
2792 | ||
e06c73cc LP |
2793 | assert(u); |
2794 | assert(c); | |
2795 | ||
085afe36 LP |
2796 | /* Patch in the manager defaults into the exec context, |
2797 | * _after_ the rest of the settings have been initialized */ | |
2798 | ||
cba6e062 | 2799 | /* This only copies in the ones that need memory */ |
517d56b1 | 2800 | for (i = 0; i < _RLIMIT_MAX; i++) |
cba6e062 LP |
2801 | if (u->manager->rlimit[i] && !c->rlimit[i]) { |
2802 | c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
2803 | if (!c->rlimit[i]) | |
2804 | return -ENOMEM; | |
2805 | } | |
2806 | ||
67445f4e | 2807 | if (u->manager->running_as == SYSTEMD_USER && |
cba6e062 | 2808 | !c->working_directory) { |
e06c73cc | 2809 | |
cba6e062 LP |
2810 | r = get_home_dir(&c->working_directory); |
2811 | if (r < 0) | |
2812 | return r; | |
2813 | } | |
2814 | ||
f513e420 LP |
2815 | if (u->manager->running_as == SYSTEMD_USER && |
2816 | (c->syscall_whitelist || | |
2817 | !set_isempty(c->syscall_filter) || | |
2818 | !set_isempty(c->syscall_archs) || | |
2819 | c->address_families_whitelist || | |
2820 | !set_isempty(c->address_families))) | |
2821 | c->no_new_privileges = true; | |
2822 | ||
cba6e062 | 2823 | return 0; |
e06c73cc LP |
2824 | } |
2825 | ||
3ef63c31 LP |
2826 | ExecContext *unit_get_exec_context(Unit *u) { |
2827 | size_t offset; | |
2828 | assert(u); | |
2829 | ||
2830 | offset = UNIT_VTABLE(u)->exec_context_offset; | |
2831 | if (offset <= 0) | |
2832 | return NULL; | |
2833 | ||
2834 | return (ExecContext*) ((uint8_t*) u + offset); | |
2835 | } | |
2836 | ||
718db961 LP |
2837 | KillContext *unit_get_kill_context(Unit *u) { |
2838 | size_t offset; | |
2839 | assert(u); | |
2840 | ||
2841 | offset = UNIT_VTABLE(u)->kill_context_offset; | |
2842 | if (offset <= 0) | |
2843 | return NULL; | |
2844 | ||
2845 | return (KillContext*) ((uint8_t*) u + offset); | |
2846 | } | |
2847 | ||
4ad49000 LP |
2848 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
2849 | size_t offset; | |
2850 | ||
2851 | offset = UNIT_VTABLE(u)->cgroup_context_offset; | |
2852 | if (offset <= 0) | |
2853 | return NULL; | |
2854 | ||
2855 | return (CGroupContext*) ((uint8_t*) u + offset); | |
2856 | } | |
2857 | ||
613b411c LP |
2858 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
2859 | size_t offset; | |
2860 | ||
2861 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
2862 | if (offset <= 0) | |
2863 | return NULL; | |
2864 | ||
2865 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
2866 | } | |
2867 | ||
8e2af478 | 2868 | static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, char **_p, char **_q) { |
b9ec9359 | 2869 | _cleanup_free_ char *b = NULL; |
26d04f86 LP |
2870 | char *p, *q; |
2871 | int r; | |
2872 | ||
71645aca | 2873 | assert(u); |
26d04f86 LP |
2874 | assert(name); |
2875 | assert(_p); | |
2876 | assert(_q); | |
71645aca | 2877 | |
b9ec9359 LP |
2878 | b = xescape(name, "/."); |
2879 | if (!b) | |
2880 | return -ENOMEM; | |
2881 | ||
2882 | if (!filename_is_safe(b)) | |
71645aca LP |
2883 | return -EINVAL; |
2884 | ||
26d04f86 LP |
2885 | if (u->manager->running_as == SYSTEMD_USER) { |
2886 | _cleanup_free_ char *c = NULL; | |
2887 | ||
2888 | r = user_config_home(&c); | |
2889 | if (r < 0) | |
2890 | return r; | |
2891 | if (r == 0) | |
2892 | return -ENOENT; | |
2893 | ||
2894 | p = strjoin(c, "/", u->id, ".d", NULL); | |
6d235724 | 2895 | } else if (mode == UNIT_PERSISTENT && !u->transient) |
26d04f86 | 2896 | p = strjoin("/etc/systemd/system/", u->id, ".d", NULL); |
8e2af478 LP |
2897 | else |
2898 | p = strjoin("/run/systemd/system/", u->id, ".d", NULL); | |
71645aca LP |
2899 | if (!p) |
2900 | return -ENOMEM; | |
2901 | ||
b9ec9359 | 2902 | q = strjoin(p, "/90-", b, ".conf", NULL); |
26d04f86 LP |
2903 | if (!q) { |
2904 | free(p); | |
71645aca | 2905 | return -ENOMEM; |
26d04f86 | 2906 | } |
71645aca | 2907 | |
26d04f86 LP |
2908 | *_p = p; |
2909 | *_q = q; | |
2910 | return 0; | |
71645aca LP |
2911 | } |
2912 | ||
8e2af478 | 2913 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
71645aca | 2914 | _cleanup_free_ char *p = NULL, *q = NULL; |
26d04f86 | 2915 | int r; |
71645aca LP |
2916 | |
2917 | assert(u); | |
b42defe3 LP |
2918 | assert(name); |
2919 | assert(data); | |
71645aca | 2920 | |
6d235724 | 2921 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
2922 | return 0; |
2923 | ||
2924 | r = drop_in_file(u, mode, name, &p, &q); | |
26d04f86 LP |
2925 | if (r < 0) |
2926 | return r; | |
71645aca | 2927 | |
26d04f86 | 2928 | mkdir_p(p, 0755); |
574d5f2d | 2929 | return write_string_file_atomic_label(q, data); |
26d04f86 | 2930 | } |
71645aca | 2931 | |
b9ec9359 LP |
2932 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
2933 | _cleanup_free_ char *p = NULL; | |
2934 | va_list ap; | |
2935 | int r; | |
2936 | ||
2937 | assert(u); | |
2938 | assert(name); | |
2939 | assert(format); | |
2940 | ||
6d235724 | 2941 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
2942 | return 0; |
2943 | ||
2944 | va_start(ap, format); | |
2945 | r = vasprintf(&p, format, ap); | |
2946 | va_end(ap); | |
2947 | ||
2948 | if (r < 0) | |
2949 | return -ENOMEM; | |
2950 | ||
2951 | return unit_write_drop_in(u, mode, name, p); | |
2952 | } | |
2953 | ||
2954 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
2955 | _cleanup_free_ char *ndata = NULL; |
2956 | ||
2957 | assert(u); | |
2958 | assert(name); | |
2959 | assert(data); | |
2960 | ||
2961 | if (!UNIT_VTABLE(u)->private_section) | |
2962 | return -EINVAL; | |
2963 | ||
6d235724 | 2964 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
2965 | return 0; |
2966 | ||
b42defe3 LP |
2967 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
2968 | if (!ndata) | |
2969 | return -ENOMEM; | |
2970 | ||
2971 | return unit_write_drop_in(u, mode, name, ndata); | |
2972 | } | |
2973 | ||
b9ec9359 LP |
2974 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
2975 | _cleanup_free_ char *p = NULL; | |
2976 | va_list ap; | |
2977 | int r; | |
2978 | ||
2979 | assert(u); | |
2980 | assert(name); | |
2981 | assert(format); | |
2982 | ||
6d235724 | 2983 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
2984 | return 0; |
2985 | ||
2986 | va_start(ap, format); | |
2987 | r = vasprintf(&p, format, ap); | |
2988 | va_end(ap); | |
2989 | ||
2990 | if (r < 0) | |
2991 | return -ENOMEM; | |
2992 | ||
2993 | return unit_write_drop_in_private(u, mode, name, p); | |
2994 | } | |
2995 | ||
8e2af478 | 2996 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
2997 | _cleanup_free_ char *p = NULL, *q = NULL; |
2998 | int r; | |
71645aca | 2999 | |
26d04f86 | 3000 | assert(u); |
71645aca | 3001 | |
6d235724 | 3002 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3003 | return 0; |
3004 | ||
3005 | r = drop_in_file(u, mode, name, &p, &q); | |
6891529f ZJS |
3006 | if (r < 0) |
3007 | return r; | |
3008 | ||
71645aca | 3009 | if (unlink(q) < 0) |
241da328 | 3010 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 3011 | else |
241da328 | 3012 | r = 1; |
71645aca LP |
3013 | |
3014 | rmdir(p); | |
26d04f86 | 3015 | return r; |
71645aca LP |
3016 | } |
3017 | ||
c2756a68 LP |
3018 | int unit_make_transient(Unit *u) { |
3019 | int r; | |
3020 | ||
3021 | assert(u); | |
3022 | ||
3023 | u->load_state = UNIT_STUB; | |
3024 | u->load_error = 0; | |
3025 | u->transient = true; | |
3026 | ||
3027 | free(u->fragment_path); | |
3028 | u->fragment_path = NULL; | |
3029 | ||
3030 | if (u->manager->running_as == SYSTEMD_USER) { | |
3031 | _cleanup_free_ char *c = NULL; | |
3032 | ||
3033 | r = user_config_home(&c); | |
3034 | if (r < 0) | |
3035 | return r; | |
3036 | if (r == 0) | |
3037 | return -ENOENT; | |
3038 | ||
3039 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
3040 | if (!u->fragment_path) | |
3041 | return -ENOMEM; | |
3042 | ||
3043 | mkdir_p(c, 0755); | |
3044 | } else { | |
3045 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
3046 | if (!u->fragment_path) | |
3047 | return -ENOMEM; | |
3048 | ||
3049 | mkdir_p("/run/systemd/system", 0755); | |
3050 | } | |
3051 | ||
3052 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
3053 | } | |
3054 | ||
cd2086fe LP |
3055 | int unit_kill_context( |
3056 | Unit *u, | |
3057 | KillContext *c, | |
3058 | bool sigkill, | |
3059 | pid_t main_pid, | |
3060 | pid_t control_pid, | |
3061 | bool main_pid_alien) { | |
3062 | ||
bc6aed7b | 3063 | int sig, wait_for_exit = false, r; |
cd2086fe LP |
3064 | |
3065 | assert(u); | |
3066 | assert(c); | |
3067 | ||
3068 | if (c->kill_mode == KILL_NONE) | |
3069 | return 0; | |
3070 | ||
3071 | sig = sigkill ? SIGKILL : c->kill_signal; | |
3072 | ||
3073 | if (main_pid > 0) { | |
3074 | r = kill_and_sigcont(main_pid, sig); | |
3075 | ||
3076 | if (r < 0 && r != -ESRCH) { | |
3077 | _cleanup_free_ char *comm = NULL; | |
3078 | get_process_comm(main_pid, &comm); | |
3079 | ||
6294b8a9 | 3080 | log_warning_unit(u->id, "Failed to kill main process " PID_FMT " (%s): %s", main_pid, strna(comm), strerror(-r)); |
82659fd7 | 3081 | } else { |
bc6aed7b LP |
3082 | if (!main_pid_alien) |
3083 | wait_for_exit = true; | |
82659fd7 | 3084 | |
97e0691f | 3085 | if (c->send_sighup && !sigkill) |
82659fd7 LP |
3086 | kill(main_pid, SIGHUP); |
3087 | } | |
cd2086fe LP |
3088 | } |
3089 | ||
3090 | if (control_pid > 0) { | |
3091 | r = kill_and_sigcont(control_pid, sig); | |
3092 | ||
3093 | if (r < 0 && r != -ESRCH) { | |
3094 | _cleanup_free_ char *comm = NULL; | |
3095 | get_process_comm(control_pid, &comm); | |
3096 | ||
6294b8a9 | 3097 | log_warning_unit(u->id, "Failed to kill control process " PID_FMT " (%s): %s", control_pid, strna(comm), strerror(-r)); |
82659fd7 | 3098 | } else { |
cd2086fe | 3099 | wait_for_exit = true; |
82659fd7 | 3100 | |
97e0691f | 3101 | if (c->send_sighup && !sigkill) |
82659fd7 LP |
3102 | kill(control_pid, SIGHUP); |
3103 | } | |
cd2086fe LP |
3104 | } |
3105 | ||
58ea275a | 3106 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && sigkill)) && u->cgroup_path) { |
cd2086fe LP |
3107 | _cleanup_set_free_ Set *pid_set = NULL; |
3108 | ||
82659fd7 LP |
3109 | /* Exclude the main/control pids from being killed via the cgroup */ |
3110 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3111 | if (!pid_set) |
3112 | return -ENOMEM; | |
3113 | ||
4ad49000 | 3114 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
3115 | if (r < 0) { |
3116 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
3117 | log_warning_unit(u->id, "Failed to kill control group: %s", strerror(-r)); | |
82659fd7 | 3118 | } else if (r > 0) { |
bc6aed7b | 3119 | |
743970d2 LP |
3120 | /* FIXME: For now, we will not wait for the |
3121 | * cgroup members to die, simply because | |
3122 | * cgroup notification is unreliable. It | |
3123 | * doesn't work at all in containers, and | |
3124 | * outside of containers it can be confused | |
3125 | * easily by leaving directories in the | |
3126 | * cgroup. */ | |
3127 | ||
3128 | /* wait_for_exit = true; */ | |
58ea275a | 3129 | |
97e0691f | 3130 | if (c->send_sighup && !sigkill) { |
82659fd7 LP |
3131 | set_free(pid_set); |
3132 | ||
3133 | pid_set = unit_pid_set(main_pid, control_pid); | |
3134 | if (!pid_set) | |
3135 | return -ENOMEM; | |
3136 | ||
8190da36 | 3137 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3138 | } |
3139 | } | |
cd2086fe LP |
3140 | } |
3141 | ||
3142 | return wait_for_exit; | |
3143 | } | |
3144 | ||
a57f7e2c LP |
3145 | int unit_require_mounts_for(Unit *u, const char *path) { |
3146 | char prefix[strlen(path) + 1], *p; | |
3147 | int r; | |
3148 | ||
3149 | assert(u); | |
3150 | assert(path); | |
3151 | ||
3152 | /* Registers a unit for requiring a certain path and all its | |
3153 | * prefixes. We keep a simple array of these paths in the | |
3154 | * unit, since its usually short. However, we build a prefix | |
3155 | * table for all possible prefixes so that new appearing mount | |
3156 | * units can easily determine which units to make themselves a | |
3157 | * dependency of. */ | |
3158 | ||
70b64bd3 ZJS |
3159 | if (!path_is_absolute(path)) |
3160 | return -EINVAL; | |
3161 | ||
a57f7e2c LP |
3162 | p = strdup(path); |
3163 | if (!p) | |
3164 | return -ENOMEM; | |
3165 | ||
3166 | path_kill_slashes(p); | |
3167 | ||
a57f7e2c LP |
3168 | if (!path_is_safe(p)) { |
3169 | free(p); | |
3170 | return -EPERM; | |
3171 | } | |
3172 | ||
3173 | if (strv_contains(u->requires_mounts_for, p)) { | |
3174 | free(p); | |
3175 | return 0; | |
3176 | } | |
3177 | ||
6e18964d ZJS |
3178 | r = strv_consume(&u->requires_mounts_for, p); |
3179 | if (r < 0) | |
a57f7e2c | 3180 | return r; |
a57f7e2c LP |
3181 | |
3182 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3183 | Set *x; | |
3184 | ||
3185 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3186 | if (!x) { | |
3187 | char *q; | |
3188 | ||
3189 | if (!u->manager->units_requiring_mounts_for) { | |
3190 | u->manager->units_requiring_mounts_for = hashmap_new(string_hash_func, string_compare_func); | |
3191 | if (!u->manager->units_requiring_mounts_for) | |
3192 | return -ENOMEM; | |
3193 | } | |
3194 | ||
3195 | q = strdup(prefix); | |
3196 | if (!q) | |
3197 | return -ENOMEM; | |
3198 | ||
3199 | x = set_new(NULL, NULL); | |
3200 | if (!x) { | |
3201 | free(q); | |
3202 | return -ENOMEM; | |
3203 | } | |
3204 | ||
3205 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3206 | if (r < 0) { | |
3207 | free(q); | |
3208 | set_free(x); | |
3209 | return r; | |
3210 | } | |
3211 | } | |
3212 | ||
3213 | r = set_put(x, u); | |
3214 | if (r < 0) | |
3215 | return r; | |
3216 | } | |
3217 | ||
3218 | return 0; | |
3219 | } | |
3220 | ||
613b411c LP |
3221 | int unit_setup_exec_runtime(Unit *u) { |
3222 | ExecRuntime **rt; | |
3223 | size_t offset; | |
3224 | Iterator i; | |
3225 | Unit *other; | |
3226 | ||
3227 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3228 | assert(offset > 0); | |
3229 | ||
3230 | /* Check if ther already is an ExecRuntime for this unit? */ | |
3231 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
3232 | if (*rt) | |
3233 | return 0; | |
3234 | ||
3235 | /* Try to get it from somebody else */ | |
3236 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3237 | ||
3238 | *rt = unit_get_exec_runtime(other); | |
3239 | if (*rt) { | |
3240 | exec_runtime_ref(*rt); | |
3241 | return 0; | |
3242 | } | |
3243 | } | |
3244 | ||
3245 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3246 | } | |
3247 | ||
94f04347 LP |
3248 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3249 | [UNIT_ACTIVE] = "active", | |
032ff4af | 3250 | [UNIT_RELOADING] = "reloading", |
94f04347 | 3251 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 3252 | [UNIT_FAILED] = "failed", |
94f04347 LP |
3253 | [UNIT_ACTIVATING] = "activating", |
3254 | [UNIT_DEACTIVATING] = "deactivating" | |
3255 | }; | |
3256 | ||
3257 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
3258 | ||
3259 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
3260 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 3261 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 | 3262 | [UNIT_REQUISITE] = "Requisite", |
9e2f7c11 | 3263 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
ac6a4abe MS |
3264 | [UNIT_WANTS] = "Wants", |
3265 | [UNIT_BINDS_TO] = "BindsTo", | |
3266 | [UNIT_PART_OF] = "PartOf", | |
94f04347 | 3267 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 3268 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 | 3269 | [UNIT_WANTED_BY] = "WantedBy", |
ac6a4abe MS |
3270 | [UNIT_BOUND_BY] = "BoundBy", |
3271 | [UNIT_CONSISTS_OF] = "ConsistsOf", | |
94f04347 | 3272 | [UNIT_CONFLICTS] = "Conflicts", |
69dd2852 | 3273 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
94f04347 LP |
3274 | [UNIT_BEFORE] = "Before", |
3275 | [UNIT_AFTER] = "After", | |
57020a3a LP |
3276 | [UNIT_ON_FAILURE] = "OnFailure", |
3277 | [UNIT_TRIGGERS] = "Triggers", | |
4dcc1cb4 | 3278 | [UNIT_TRIGGERED_BY] = "TriggeredBy", |
7f2cddae | 3279 | [UNIT_PROPAGATES_RELOAD_TO] = "PropagatesReloadTo", |
ac6a4abe | 3280 | [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom", |
2c5859af | 3281 | [UNIT_JOINS_NAMESPACE_OF] = "JoinsNamespaceOf", |
ac6a4abe MS |
3282 | [UNIT_REFERENCES] = "References", |
3283 | [UNIT_REFERENCED_BY] = "ReferencedBy", | |
94f04347 LP |
3284 | }; |
3285 | ||
3286 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |