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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
87f0e418 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
87f0e418 LP |
22 | #include <assert.h> |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <sys/epoll.h> | |
26 | #include <sys/timerfd.h> | |
27 | #include <sys/poll.h> | |
0301abf4 LP |
28 | #include <stdlib.h> |
29 | #include <unistd.h> | |
45fb0699 | 30 | #include <sys/stat.h> |
87f0e418 | 31 | |
877d54e9 LP |
32 | #include "systemd/sd-id128.h" |
33 | #include "systemd/sd-messages.h" | |
87f0e418 LP |
34 | #include "set.h" |
35 | #include "unit.h" | |
36 | #include "macro.h" | |
37 | #include "strv.h" | |
9eb977db | 38 | #include "path-util.h" |
87f0e418 LP |
39 | #include "load-fragment.h" |
40 | #include "load-dropin.h" | |
41 | #include "log.h" | |
9e2f7c11 LP |
42 | #include "unit-name.h" |
43 | #include "specifier.h" | |
4139c1b2 | 44 | #include "dbus-unit.h" |
514f4ef5 | 45 | #include "special.h" |
c6c18be3 | 46 | #include "cgroup-util.h" |
4927fcae | 47 | #include "missing.h" |
ab1f0633 | 48 | #include "cgroup-attr.h" |
87f0e418 LP |
49 | |
50 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
51 | [UNIT_SERVICE] = &service_vtable, | |
52 | [UNIT_TIMER] = &timer_vtable, | |
53 | [UNIT_SOCKET] = &socket_vtable, | |
54 | [UNIT_TARGET] = &target_vtable, | |
55 | [UNIT_DEVICE] = &device_vtable, | |
56 | [UNIT_MOUNT] = &mount_vtable, | |
57 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
07b0b134 | 58 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
01f78473 LP |
59 | [UNIT_SWAP] = &swap_vtable, |
60 | [UNIT_PATH] = &path_vtable | |
87f0e418 LP |
61 | }; |
62 | ||
7d17cfbc | 63 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
64 | Unit *u; |
65 | ||
66 | assert(m); | |
ac155bb8 | 67 | assert(size >= sizeof(Unit)); |
87f0e418 | 68 | |
7d17cfbc MS |
69 | u = malloc0(size); |
70 | if (!u) | |
87f0e418 LP |
71 | return NULL; |
72 | ||
ac155bb8 MS |
73 | u->names = set_new(string_hash_func, string_compare_func); |
74 | if (!u->names) { | |
87f0e418 LP |
75 | free(u); |
76 | return NULL; | |
77 | } | |
78 | ||
ac155bb8 MS |
79 | u->manager = m; |
80 | u->type = _UNIT_TYPE_INVALID; | |
81 | u->deserialized_job = _JOB_TYPE_INVALID; | |
82 | u->default_dependencies = true; | |
83 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
87f0e418 LP |
84 | |
85 | return u; | |
86 | } | |
87 | ||
f278026d LP |
88 | bool unit_has_name(Unit *u, const char *name) { |
89 | assert(u); | |
90 | assert(name); | |
91 | ||
ac155bb8 | 92 | return !!set_get(u->names, (char*) name); |
f278026d LP |
93 | } |
94 | ||
87f0e418 LP |
95 | int unit_add_name(Unit *u, const char *text) { |
96 | UnitType t; | |
276c3e78 | 97 | char *s, *i = NULL; |
87f0e418 LP |
98 | int r; |
99 | ||
100 | assert(u); | |
101 | assert(text); | |
102 | ||
9e2f7c11 | 103 | if (unit_name_is_template(text)) { |
ac155bb8 | 104 | if (!u->instance) |
9e2f7c11 | 105 | return -EINVAL; |
87f0e418 | 106 | |
ac155bb8 | 107 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
108 | } else |
109 | s = strdup(text); | |
87f0e418 | 110 | |
9e2f7c11 LP |
111 | if (!s) |
112 | return -ENOMEM; | |
87f0e418 | 113 | |
b9c0d441 | 114 | if (!unit_name_is_valid(s, false)) { |
9e2f7c11 LP |
115 | r = -EINVAL; |
116 | goto fail; | |
117 | } | |
e537352b | 118 | |
9e2f7c11 | 119 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 120 | |
ac155bb8 | 121 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) { |
9e2f7c11 LP |
122 | r = -EINVAL; |
123 | goto fail; | |
124 | } | |
87f0e418 | 125 | |
9e2f7c11 LP |
126 | if ((r = unit_name_to_instance(s, &i)) < 0) |
127 | goto fail; | |
87f0e418 | 128 | |
796ba554 LP |
129 | if (i && unit_vtable[t]->no_instances) { |
130 | r = -EINVAL; | |
9e2f7c11 | 131 | goto fail; |
796ba554 | 132 | } |
9e2f7c11 | 133 | |
276c3e78 LP |
134 | /* Ensure that this unit is either instanced or not instanced, |
135 | * but not both. */ | |
ac155bb8 | 136 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) { |
9e2f7c11 LP |
137 | r = -EINVAL; |
138 | goto fail; | |
139 | } | |
140 | ||
141 | if (unit_vtable[t]->no_alias && | |
ac155bb8 MS |
142 | !set_isempty(u->names) && |
143 | !set_get(u->names, s)) { | |
9e2f7c11 LP |
144 | r = -EEXIST; |
145 | goto fail; | |
146 | } | |
147 | ||
ac155bb8 | 148 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) { |
4f0f902f LP |
149 | r = -E2BIG; |
150 | goto fail; | |
151 | } | |
152 | ||
ac155bb8 | 153 | if ((r = set_put(u->names, s)) < 0) { |
9e2f7c11 LP |
154 | if (r == -EEXIST) |
155 | r = 0; | |
156 | goto fail; | |
87f0e418 LP |
157 | } |
158 | ||
ac155bb8 MS |
159 | if ((r = hashmap_put(u->manager->units, s, u)) < 0) { |
160 | set_remove(u->names, s); | |
9e2f7c11 | 161 | goto fail; |
87f0e418 LP |
162 | } |
163 | ||
ac155bb8 | 164 | if (u->type == _UNIT_TYPE_INVALID) { |
ef734fd6 | 165 | |
ac155bb8 MS |
166 | u->type = t; |
167 | u->id = s; | |
168 | u->instance = i; | |
9e2f7c11 | 169 | |
ac155bb8 | 170 | LIST_PREPEND(Unit, units_by_type, u->manager->units_by_type[t], u); |
e537352b LP |
171 | |
172 | if (UNIT_VTABLE(u)->init) | |
173 | UNIT_VTABLE(u)->init(u); | |
9e2f7c11 LP |
174 | } else |
175 | free(i); | |
87f0e418 | 176 | |
c1e1601e | 177 | unit_add_to_dbus_queue(u); |
87f0e418 | 178 | return 0; |
9e2f7c11 LP |
179 | |
180 | fail: | |
181 | free(s); | |
182 | free(i); | |
183 | ||
184 | return r; | |
87f0e418 LP |
185 | } |
186 | ||
0ae97ec1 | 187 | int unit_choose_id(Unit *u, const char *name) { |
276c3e78 LP |
188 | char *s, *t = NULL, *i; |
189 | int r; | |
0ae97ec1 LP |
190 | |
191 | assert(u); | |
192 | assert(name); | |
193 | ||
9e2f7c11 LP |
194 | if (unit_name_is_template(name)) { |
195 | ||
ac155bb8 | 196 | if (!u->instance) |
9e2f7c11 LP |
197 | return -EINVAL; |
198 | ||
ac155bb8 | 199 | if (!(t = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
200 | return -ENOMEM; |
201 | ||
202 | name = t; | |
203 | } | |
204 | ||
0ae97ec1 | 205 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 206 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 207 | free(t); |
0ae97ec1 | 208 | |
9e2f7c11 | 209 | if (!s) |
0ae97ec1 LP |
210 | return -ENOENT; |
211 | ||
276c3e78 LP |
212 | if ((r = unit_name_to_instance(s, &i)) < 0) |
213 | return r; | |
214 | ||
ac155bb8 | 215 | u->id = s; |
276c3e78 | 216 | |
ac155bb8 MS |
217 | free(u->instance); |
218 | u->instance = i; | |
276c3e78 | 219 | |
c1e1601e | 220 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 221 | |
0ae97ec1 LP |
222 | return 0; |
223 | } | |
224 | ||
f50e0a01 LP |
225 | int unit_set_description(Unit *u, const char *description) { |
226 | char *s; | |
227 | ||
228 | assert(u); | |
229 | ||
230 | if (!(s = strdup(description))) | |
231 | return -ENOMEM; | |
232 | ||
ac155bb8 MS |
233 | free(u->description); |
234 | u->description = s; | |
c1e1601e LP |
235 | |
236 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
237 | return 0; |
238 | } | |
239 | ||
701cc384 LP |
240 | bool unit_check_gc(Unit *u) { |
241 | assert(u); | |
242 | ||
ac155bb8 | 243 | if (u->load_state == UNIT_STUB) |
b86d44e5 LP |
244 | return true; |
245 | ||
701cc384 LP |
246 | if (UNIT_VTABLE(u)->no_gc) |
247 | return true; | |
248 | ||
ac155bb8 | 249 | if (u->no_gc) |
6c073082 LP |
250 | return true; |
251 | ||
ac155bb8 | 252 | if (u->job) |
701cc384 LP |
253 | return true; |
254 | ||
e0209d83 MS |
255 | if (u->nop_job) |
256 | return true; | |
257 | ||
701cc384 LP |
258 | if (unit_active_state(u) != UNIT_INACTIVE) |
259 | return true; | |
260 | ||
261 | if (UNIT_VTABLE(u)->check_gc) | |
262 | if (UNIT_VTABLE(u)->check_gc(u)) | |
263 | return true; | |
264 | ||
265 | return false; | |
266 | } | |
267 | ||
87f0e418 LP |
268 | void unit_add_to_load_queue(Unit *u) { |
269 | assert(u); | |
ac155bb8 | 270 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 271 | |
ac155bb8 | 272 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
273 | return; |
274 | ||
ac155bb8 MS |
275 | LIST_PREPEND(Unit, load_queue, u->manager->load_queue, u); |
276 | u->in_load_queue = true; | |
87f0e418 LP |
277 | } |
278 | ||
23a177ef LP |
279 | void unit_add_to_cleanup_queue(Unit *u) { |
280 | assert(u); | |
281 | ||
ac155bb8 | 282 | if (u->in_cleanup_queue) |
23a177ef LP |
283 | return; |
284 | ||
ac155bb8 MS |
285 | LIST_PREPEND(Unit, cleanup_queue, u->manager->cleanup_queue, u); |
286 | u->in_cleanup_queue = true; | |
23a177ef LP |
287 | } |
288 | ||
701cc384 LP |
289 | void unit_add_to_gc_queue(Unit *u) { |
290 | assert(u); | |
291 | ||
ac155bb8 | 292 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
293 | return; |
294 | ||
295 | if (unit_check_gc(u)) | |
296 | return; | |
297 | ||
ac155bb8 MS |
298 | LIST_PREPEND(Unit, gc_queue, u->manager->gc_queue, u); |
299 | u->in_gc_queue = true; | |
701cc384 | 300 | |
ac155bb8 | 301 | u->manager->n_in_gc_queue ++; |
701cc384 | 302 | |
ac155bb8 MS |
303 | if (u->manager->gc_queue_timestamp <= 0) |
304 | u->manager->gc_queue_timestamp = now(CLOCK_MONOTONIC); | |
701cc384 LP |
305 | } |
306 | ||
c1e1601e LP |
307 | void unit_add_to_dbus_queue(Unit *u) { |
308 | assert(u); | |
ac155bb8 | 309 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 310 | |
ac155bb8 | 311 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
312 | return; |
313 | ||
a567261a | 314 | /* Shortcut things if nobody cares */ |
ac155bb8 MS |
315 | if (!bus_has_subscriber(u->manager)) { |
316 | u->sent_dbus_new_signal = true; | |
94b6dfa2 LP |
317 | return; |
318 | } | |
319 | ||
ac155bb8 MS |
320 | LIST_PREPEND(Unit, dbus_queue, u->manager->dbus_unit_queue, u); |
321 | u->in_dbus_queue = true; | |
c1e1601e LP |
322 | } |
323 | ||
87f0e418 LP |
324 | static void bidi_set_free(Unit *u, Set *s) { |
325 | Iterator i; | |
326 | Unit *other; | |
327 | ||
328 | assert(u); | |
329 | ||
330 | /* Frees the set and makes sure we are dropped from the | |
331 | * inverse pointers */ | |
332 | ||
333 | SET_FOREACH(other, s, i) { | |
334 | UnitDependency d; | |
335 | ||
336 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 337 | set_remove(other->dependencies[d], u); |
701cc384 LP |
338 | |
339 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
340 | } |
341 | ||
342 | set_free(s); | |
343 | } | |
344 | ||
345 | void unit_free(Unit *u) { | |
346 | UnitDependency d; | |
347 | Iterator i; | |
348 | char *t; | |
349 | ||
350 | assert(u); | |
351 | ||
c1e1601e LP |
352 | bus_unit_send_removed_signal(u); |
353 | ||
ac155bb8 | 354 | if (u->load_state != UNIT_STUB) |
a013b84b LP |
355 | if (UNIT_VTABLE(u)->done) |
356 | UNIT_VTABLE(u)->done(u); | |
357 | ||
ac155bb8 MS |
358 | SET_FOREACH(t, u->names, i) |
359 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 360 | |
97e7d748 MS |
361 | if (u->job) { |
362 | Job *j = u->job; | |
363 | job_uninstall(j); | |
364 | job_free(j); | |
365 | } | |
964e0949 | 366 | |
e0209d83 MS |
367 | if (u->nop_job) { |
368 | Job *j = u->nop_job; | |
369 | job_uninstall(j); | |
370 | job_free(j); | |
371 | } | |
372 | ||
964e0949 | 373 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 374 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 375 | |
7c8fa05c LP |
376 | if (u->requires_mounts_for) { |
377 | LIST_REMOVE(Unit, has_requires_mounts_for, u->manager->has_requires_mounts_for, u); | |
378 | strv_free(u->requires_mounts_for); | |
379 | } | |
380 | ||
ac155bb8 MS |
381 | if (u->type != _UNIT_TYPE_INVALID) |
382 | LIST_REMOVE(Unit, units_by_type, u->manager->units_by_type[u->type], u); | |
ef734fd6 | 383 | |
ac155bb8 MS |
384 | if (u->in_load_queue) |
385 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
87f0e418 | 386 | |
ac155bb8 MS |
387 | if (u->in_dbus_queue) |
388 | LIST_REMOVE(Unit, dbus_queue, u->manager->dbus_unit_queue, u); | |
c1e1601e | 389 | |
ac155bb8 MS |
390 | if (u->in_cleanup_queue) |
391 | LIST_REMOVE(Unit, cleanup_queue, u->manager->cleanup_queue, u); | |
23a177ef | 392 | |
ac155bb8 MS |
393 | if (u->in_gc_queue) { |
394 | LIST_REMOVE(Unit, gc_queue, u->manager->gc_queue, u); | |
395 | u->manager->n_in_gc_queue--; | |
701cc384 LP |
396 | } |
397 | ||
ac155bb8 MS |
398 | cgroup_bonding_free_list(u->cgroup_bondings, u->manager->n_reloading <= 0); |
399 | cgroup_attribute_free_list(u->cgroup_attributes); | |
87f0e418 | 400 | |
ac155bb8 | 401 | free(u->description); |
49dbfa7b | 402 | strv_free(u->documentation); |
ac155bb8 | 403 | free(u->fragment_path); |
1b64d026 | 404 | free(u->source_path); |
ac155bb8 | 405 | free(u->instance); |
87f0e418 | 406 | |
ac155bb8 | 407 | set_free_free(u->names); |
87f0e418 | 408 | |
ac155bb8 | 409 | condition_free_list(u->conditions); |
52661efd | 410 | |
ac155bb8 MS |
411 | while (u->refs) |
412 | unit_ref_unset(u->refs); | |
57020a3a | 413 | |
87f0e418 LP |
414 | free(u); |
415 | } | |
416 | ||
417 | UnitActiveState unit_active_state(Unit *u) { | |
418 | assert(u); | |
419 | ||
ac155bb8 | 420 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
421 | return unit_active_state(unit_follow_merge(u)); |
422 | ||
423 | /* After a reload it might happen that a unit is not correctly | |
424 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 425 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
426 | |
427 | return UNIT_VTABLE(u)->active_state(u); | |
428 | } | |
429 | ||
10a94420 LP |
430 | const char* unit_sub_state_to_string(Unit *u) { |
431 | assert(u); | |
432 | ||
433 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
434 | } | |
435 | ||
23a177ef LP |
436 | static void complete_move(Set **s, Set **other) { |
437 | assert(s); | |
438 | assert(other); | |
87f0e418 | 439 | |
23a177ef LP |
440 | if (!*other) |
441 | return; | |
87f0e418 LP |
442 | |
443 | if (*s) | |
23a177ef LP |
444 | set_move(*s, *other); |
445 | else { | |
446 | *s = *other; | |
447 | *other = NULL; | |
448 | } | |
449 | } | |
87f0e418 | 450 | |
23a177ef LP |
451 | static void merge_names(Unit *u, Unit *other) { |
452 | char *t; | |
453 | Iterator i; | |
87f0e418 | 454 | |
23a177ef LP |
455 | assert(u); |
456 | assert(other); | |
457 | ||
ac155bb8 | 458 | complete_move(&u->names, &other->names); |
23a177ef | 459 | |
ac155bb8 MS |
460 | set_free_free(other->names); |
461 | other->names = NULL; | |
462 | other->id = NULL; | |
23a177ef | 463 | |
ac155bb8 MS |
464 | SET_FOREACH(t, u->names, i) |
465 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
87f0e418 LP |
466 | } |
467 | ||
23a177ef LP |
468 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
469 | Iterator i; | |
470 | Unit *back; | |
87f0e418 | 471 | int r; |
23a177ef LP |
472 | |
473 | assert(u); | |
474 | assert(other); | |
475 | assert(d < _UNIT_DEPENDENCY_MAX); | |
476 | ||
83a95334 | 477 | /* Fix backwards pointers */ |
ac155bb8 | 478 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
479 | UnitDependency k; |
480 | ||
481 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
ac155bb8 | 482 | if ((r = set_remove_and_put(back->dependencies[k], other, u)) < 0) { |
23a177ef LP |
483 | |
484 | if (r == -EEXIST) | |
ac155bb8 | 485 | set_remove(back->dependencies[k], other); |
23a177ef LP |
486 | else |
487 | assert(r == -ENOENT); | |
488 | } | |
489 | } | |
490 | ||
ac155bb8 | 491 | complete_move(&u->dependencies[d], &other->dependencies[d]); |
23a177ef | 492 | |
ac155bb8 MS |
493 | set_free(other->dependencies[d]); |
494 | other->dependencies[d] = NULL; | |
23a177ef LP |
495 | } |
496 | ||
497 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
498 | UnitDependency d; |
499 | ||
500 | assert(u); | |
501 | assert(other); | |
ac155bb8 MS |
502 | assert(u->manager == other->manager); |
503 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 504 | |
cc916967 LP |
505 | other = unit_follow_merge(other); |
506 | ||
23a177ef LP |
507 | if (other == u) |
508 | return 0; | |
509 | ||
ac155bb8 | 510 | if (u->type != other->type) |
9e2f7c11 LP |
511 | return -EINVAL; |
512 | ||
ac155bb8 | 513 | if (!u->instance != !other->instance) |
87f0e418 LP |
514 | return -EINVAL; |
515 | ||
ac155bb8 MS |
516 | if (other->load_state != UNIT_STUB && |
517 | other->load_state != UNIT_ERROR) | |
23a177ef | 518 | return -EEXIST; |
87f0e418 | 519 | |
ac155bb8 | 520 | if (other->job) |
819e213f LP |
521 | return -EEXIST; |
522 | ||
e0209d83 MS |
523 | if (other->nop_job) |
524 | return -EEXIST; | |
525 | ||
fdf20a31 | 526 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
527 | return -EEXIST; |
528 | ||
87f0e418 | 529 | /* Merge names */ |
23a177ef | 530 | merge_names(u, other); |
87f0e418 | 531 | |
57020a3a | 532 | /* Redirect all references */ |
ac155bb8 MS |
533 | while (other->refs) |
534 | unit_ref_set(other->refs, u); | |
57020a3a | 535 | |
87f0e418 LP |
536 | /* Merge dependencies */ |
537 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 538 | merge_dependencies(u, other, d); |
87f0e418 | 539 | |
ac155bb8 MS |
540 | other->load_state = UNIT_MERGED; |
541 | other->merged_into = u; | |
23a177ef | 542 | |
3616a49c LP |
543 | /* If there is still some data attached to the other node, we |
544 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 545 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
546 | if (UNIT_VTABLE(other)->done) |
547 | UNIT_VTABLE(other)->done(other); | |
548 | ||
549 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
550 | unit_add_to_cleanup_queue(other); |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
555 | int unit_merge_by_name(Unit *u, const char *name) { | |
556 | Unit *other; | |
9e2f7c11 LP |
557 | int r; |
558 | char *s = NULL; | |
23a177ef LP |
559 | |
560 | assert(u); | |
561 | assert(name); | |
562 | ||
9e2f7c11 | 563 | if (unit_name_is_template(name)) { |
ac155bb8 | 564 | if (!u->instance) |
9e2f7c11 LP |
565 | return -EINVAL; |
566 | ||
ac155bb8 | 567 | if (!(s = unit_name_replace_instance(name, u->instance))) |
9e2f7c11 LP |
568 | return -ENOMEM; |
569 | ||
570 | name = s; | |
571 | } | |
572 | ||
ac155bb8 | 573 | if (!(other = manager_get_unit(u->manager, name))) |
9e2f7c11 LP |
574 | r = unit_add_name(u, name); |
575 | else | |
576 | r = unit_merge(u, other); | |
23a177ef | 577 | |
9e2f7c11 LP |
578 | free(s); |
579 | return r; | |
23a177ef LP |
580 | } |
581 | ||
582 | Unit* unit_follow_merge(Unit *u) { | |
583 | assert(u); | |
584 | ||
ac155bb8 MS |
585 | while (u->load_state == UNIT_MERGED) |
586 | assert_se(u = u->merged_into); | |
23a177ef LP |
587 | |
588 | return u; | |
589 | } | |
590 | ||
591 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
592 | int r; | |
593 | ||
594 | assert(u); | |
595 | assert(c); | |
596 | ||
ecc6e2b8 LP |
597 | if (c->std_output != EXEC_OUTPUT_KMSG && |
598 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 599 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
600 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
601 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 602 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 603 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 604 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 605 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 606 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 607 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 608 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
609 | return 0; |
610 | ||
611 | /* If syslog or kernel logging is requested, make sure our own | |
612 | * logging daemon is run first. */ | |
613 | ||
ac155bb8 | 614 | if (u->manager->running_as == MANAGER_SYSTEM) |
54fe0cdb | 615 | if ((r = unit_add_two_dependencies_by_name(u, UNIT_REQUIRES, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true)) < 0) |
23a177ef LP |
616 | return r; |
617 | ||
87f0e418 LP |
618 | return 0; |
619 | } | |
620 | ||
87f0e418 LP |
621 | const char *unit_description(Unit *u) { |
622 | assert(u); | |
623 | ||
ac155bb8 MS |
624 | if (u->description) |
625 | return u->description; | |
87f0e418 | 626 | |
ac155bb8 | 627 | return strna(u->id); |
87f0e418 LP |
628 | } |
629 | ||
630 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 631 | char *t, **j; |
87f0e418 LP |
632 | UnitDependency d; |
633 | Iterator i; | |
47be870b LP |
634 | char *p2; |
635 | const char *prefix2; | |
173e3821 LP |
636 | char |
637 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
638 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
639 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
640 | timestamp4[FORMAT_TIMESTAMP_MAX], |
641 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 642 | Unit *following; |
87f0e418 LP |
643 | |
644 | assert(u); | |
ac155bb8 | 645 | assert(u->type >= 0); |
87f0e418 LP |
646 | |
647 | if (!prefix) | |
648 | prefix = ""; | |
47be870b LP |
649 | p2 = strappend(prefix, "\t"); |
650 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
651 | |
652 | fprintf(f, | |
40d50879 | 653 | "%s-> Unit %s:\n" |
87f0e418 | 654 | "%s\tDescription: %s\n" |
9e2f7c11 | 655 | "%s\tInstance: %s\n" |
87f0e418 | 656 | "%s\tUnit Load State: %s\n" |
2fad8195 | 657 | "%s\tUnit Active State: %s\n" |
173e3821 | 658 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 659 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 660 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 661 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 LP |
662 | "%s\tGC Check Good: %s\n" |
663 | "%s\tNeed Daemon Reload: %s\n", | |
ac155bb8 | 664 | prefix, u->id, |
87f0e418 | 665 | prefix, unit_description(u), |
ac155bb8 MS |
666 | prefix, strna(u->instance), |
667 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 668 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
669 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
670 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
671 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
672 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 LP |
673 | prefix, yes_no(unit_check_gc(u)), |
674 | prefix, yes_no(unit_need_daemon_reload(u))); | |
0301abf4 | 675 | |
ac155bb8 | 676 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
677 | fprintf(f, "%s\tName: %s\n", prefix, t); |
678 | ||
49dbfa7b LP |
679 | STRV_FOREACH(j, u->documentation) |
680 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
681 | ||
a7f241db | 682 | if ((following = unit_following(u))) |
ac155bb8 | 683 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 684 | |
ac155bb8 MS |
685 | if (u->fragment_path) |
686 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 687 | |
1b64d026 LP |
688 | if (u->source_path) |
689 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
690 | ||
ac155bb8 MS |
691 | if (u->job_timeout > 0) |
692 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout)); | |
faf919f1 | 693 | |
ac155bb8 | 694 | condition_dump_list(u->conditions, f, prefix); |
52661efd | 695 | |
ac155bb8 | 696 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
697 | fprintf(f, |
698 | "%s\tCondition Timestamp: %s\n" | |
699 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
700 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
701 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 702 | |
87f0e418 LP |
703 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
704 | Unit *other; | |
705 | ||
ac155bb8 MS |
706 | SET_FOREACH(other, u->dependencies[d], i) |
707 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
708 | } |
709 | ||
7c8fa05c | 710 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
711 | fprintf(f, |
712 | "%s\tRequiresMountsFor:", prefix); | |
713 | ||
714 | STRV_FOREACH(j, u->requires_mounts_for) | |
715 | fprintf(f, " %s", *j); | |
716 | ||
717 | fputs("\n", f); | |
718 | } | |
719 | ||
ac155bb8 | 720 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 LP |
721 | CGroupBonding *b; |
722 | CGroupAttribute *a; | |
723 | ||
b0650475 | 724 | fprintf(f, |
a40eb732 | 725 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
726 | "%s\tRefuseManualStart: %s\n" |
727 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 728 | "%s\tDefaultDependencies: %s\n" |
c8f4d764 | 729 | "%s\tOnFailureIsolate: %s\n" |
7a6000a6 LP |
730 | "%s\tIgnoreOnIsolate: %s\n" |
731 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
732 | prefix, yes_no(u->stop_when_unneeded), |
733 | prefix, yes_no(u->refuse_manual_start), | |
734 | prefix, yes_no(u->refuse_manual_stop), | |
735 | prefix, yes_no(u->default_dependencies), | |
736 | prefix, yes_no(u->on_failure_isolate), | |
737 | prefix, yes_no(u->ignore_on_isolate), | |
738 | prefix, yes_no(u->ignore_on_snapshot)); | |
739 | ||
740 | LIST_FOREACH(by_unit, b, u->cgroup_bondings) | |
23a177ef LP |
741 | fprintf(f, "%s\tControlGroup: %s:%s\n", |
742 | prefix, b->controller, b->path); | |
8e274523 | 743 | |
ac155bb8 | 744 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) { |
d8bbda91 LP |
745 | char *v = NULL; |
746 | ||
747 | if (a->map_callback) | |
748 | a->map_callback(a->controller, a->name, a->value, &v); | |
749 | ||
ab1f0633 | 750 | fprintf(f, "%s\tControlGroupAttribute: %s %s \"%s\"\n", |
d8bbda91 LP |
751 | prefix, a->controller, a->name, v ? v : a->value); |
752 | ||
753 | free(v); | |
754 | } | |
ab1f0633 | 755 | |
23a177ef LP |
756 | if (UNIT_VTABLE(u)->dump) |
757 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 758 | |
ac155bb8 | 759 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
760 | fprintf(f, |
761 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
762 | prefix, u->merged_into->id); |
763 | else if (u->load_state == UNIT_ERROR) | |
764 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 765 | |
87f0e418 | 766 | |
ac155bb8 MS |
767 | if (u->job) |
768 | job_dump(u->job, f, prefix2); | |
87f0e418 | 769 | |
e0209d83 MS |
770 | if (u->nop_job) |
771 | job_dump(u->nop_job, f, prefix2); | |
772 | ||
47be870b | 773 | free(p2); |
87f0e418 LP |
774 | } |
775 | ||
776 | /* Common implementation for multiple backends */ | |
e537352b | 777 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
778 | int r; |
779 | ||
780 | assert(u); | |
23a177ef LP |
781 | |
782 | /* Load a .service file */ | |
e537352b | 783 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
784 | return r; |
785 | ||
ac155bb8 | 786 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
787 | return -ENOENT; |
788 | ||
789 | /* Load drop-in directory data */ | |
790 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
791 | return r; | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | /* Common implementation for multiple backends */ | |
e537352b | 797 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 798 | int r; |
87f0e418 LP |
799 | |
800 | assert(u); | |
801 | ||
23a177ef LP |
802 | /* Same as unit_load_fragment_and_dropin(), but whether |
803 | * something can be loaded or not doesn't matter. */ | |
804 | ||
805 | /* Load a .service file */ | |
e537352b | 806 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
807 | return r; |
808 | ||
ac155bb8 MS |
809 | if (u->load_state == UNIT_STUB) |
810 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 811 | |
87f0e418 | 812 | /* Load drop-in directory data */ |
23a177ef | 813 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
814 | return r; |
815 | ||
23a177ef | 816 | return 0; |
87f0e418 LP |
817 | } |
818 | ||
bba34eed | 819 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
820 | assert(u); |
821 | assert(target); | |
822 | ||
ac155bb8 | 823 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
824 | return 0; |
825 | ||
35b8ca3a | 826 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 827 | * that loop check below is reliable */ |
ac155bb8 MS |
828 | if (u->load_state != UNIT_LOADED || |
829 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
830 | return 0; |
831 | ||
21256a2b LP |
832 | /* If either side wants no automatic dependencies, then let's |
833 | * skip this */ | |
ac155bb8 MS |
834 | if (!u->default_dependencies || |
835 | !target->default_dependencies) | |
21256a2b LP |
836 | return 0; |
837 | ||
98bc2000 | 838 | /* Don't create loops */ |
ac155bb8 | 839 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
840 | return 0; |
841 | ||
842 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
843 | } | |
844 | ||
845 | static int unit_add_default_dependencies(Unit *u) { | |
21256a2b LP |
846 | static const UnitDependency deps[] = { |
847 | UNIT_REQUIRED_BY, | |
848 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
849 | UNIT_WANTED_BY, | |
850 | UNIT_BOUND_BY | |
851 | }; | |
852 | ||
bba34eed | 853 | Unit *target; |
98bc2000 LP |
854 | Iterator i; |
855 | int r; | |
21256a2b | 856 | unsigned k; |
98bc2000 LP |
857 | |
858 | assert(u); | |
859 | ||
21256a2b | 860 | for (k = 0; k < ELEMENTSOF(deps); k++) |
ac155bb8 | 861 | SET_FOREACH(target, u->dependencies[deps[k]], i) |
21256a2b LP |
862 | if ((r = unit_add_default_target_dependency(u, target)) < 0) |
863 | return r; | |
b81884e7 | 864 | |
98bc2000 LP |
865 | return 0; |
866 | } | |
867 | ||
87f0e418 LP |
868 | int unit_load(Unit *u) { |
869 | int r; | |
870 | ||
871 | assert(u); | |
872 | ||
ac155bb8 MS |
873 | if (u->in_load_queue) { |
874 | LIST_REMOVE(Unit, load_queue, u->manager->load_queue, u); | |
875 | u->in_load_queue = false; | |
87f0e418 LP |
876 | } |
877 | ||
ac155bb8 | 878 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
879 | return -EINVAL; |
880 | ||
ac155bb8 | 881 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
882 | return 0; |
883 | ||
e537352b LP |
884 | if (UNIT_VTABLE(u)->load) |
885 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 886 | goto fail; |
23a177ef | 887 | |
ac155bb8 | 888 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
889 | r = -ENOENT; |
890 | goto fail; | |
891 | } | |
892 | ||
ac155bb8 MS |
893 | if (u->load_state == UNIT_LOADED && |
894 | u->default_dependencies) | |
98bc2000 LP |
895 | if ((r = unit_add_default_dependencies(u)) < 0) |
896 | goto fail; | |
897 | ||
7c8fa05c LP |
898 | if (u->load_state == UNIT_LOADED) { |
899 | r = unit_add_mount_links(u); | |
900 | if (r < 0) | |
901 | return r; | |
902 | } | |
903 | ||
ac155bb8 MS |
904 | if (u->on_failure_isolate && |
905 | set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { | |
f68319bb LP |
906 | |
907 | log_error("More than one OnFailure= dependencies specified for %s but OnFailureIsolate= enabled. Refusing.", | |
ac155bb8 | 908 | u->id); |
f68319bb LP |
909 | |
910 | r = -EINVAL; | |
911 | goto fail; | |
912 | } | |
913 | ||
ac155bb8 | 914 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
915 | |
916 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 917 | unit_add_to_gc_queue(u); |
87f0e418 | 918 | |
87f0e418 LP |
919 | return 0; |
920 | ||
921 | fail: | |
ac155bb8 MS |
922 | u->load_state = UNIT_ERROR; |
923 | u->load_error = r; | |
c1e1601e | 924 | unit_add_to_dbus_queue(u); |
9a46fc3b | 925 | unit_add_to_gc_queue(u); |
23a177ef | 926 | |
ac155bb8 | 927 | log_debug("Failed to load configuration for %s: %s", u->id, strerror(-r)); |
23a177ef | 928 | |
87f0e418 LP |
929 | return r; |
930 | } | |
931 | ||
90bbc946 LP |
932 | bool unit_condition_test(Unit *u) { |
933 | assert(u); | |
934 | ||
ac155bb8 MS |
935 | dual_timestamp_get(&u->condition_timestamp); |
936 | u->condition_result = condition_test_list(u->conditions); | |
90bbc946 | 937 | |
ac155bb8 | 938 | return u->condition_result; |
90bbc946 LP |
939 | } |
940 | ||
877d54e9 | 941 | static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 942 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
943 | |
944 | assert(u); | |
945 | assert(t >= 0); | |
946 | assert(t < _JOB_TYPE_MAX); | |
947 | ||
948 | if (t != JOB_START && t != JOB_STOP) | |
949 | return NULL; | |
c6918296 MS |
950 | |
951 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
952 | if (!format_table) | |
877d54e9 LP |
953 | return NULL; |
954 | ||
955 | return format_table->starting_stopping[t == JOB_STOP]; | |
956 | } | |
957 | ||
958 | static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { | |
959 | const char *format; | |
960 | ||
961 | assert(u); | |
962 | assert(t >= 0); | |
963 | assert(t < _JOB_TYPE_MAX); | |
964 | ||
965 | format = unit_get_status_message_format(u, t); | |
966 | if (format) | |
967 | return format; | |
968 | ||
969 | /* Return generic strings */ | |
970 | if (t == JOB_START) | |
971 | return "Starting %s."; | |
972 | else if (t == JOB_STOP) | |
973 | return "Stopping %s."; | |
974 | else if (t == JOB_RELOAD) | |
975 | return "Reloading %s."; | |
976 | ||
977 | return NULL; | |
978 | } | |
979 | ||
980 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
981 | const char *format; | |
982 | ||
983 | assert(u); | |
984 | ||
985 | /* We only print status messages for selected units on | |
986 | * selected operations. */ | |
c6918296 | 987 | |
877d54e9 | 988 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
989 | if (!format) |
990 | return; | |
991 | ||
992 | unit_status_printf(u, "", format, unit_description(u)); | |
993 | } | |
994 | ||
877d54e9 LP |
995 | #pragma GCC diagnostic push |
996 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
997 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { | |
998 | const char *format; | |
999 | char buf[LINE_MAX]; | |
1000 | sd_id128_t mid; | |
1001 | ||
1002 | assert(u); | |
1003 | ||
1004 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1005 | return; | |
1006 | ||
81270860 LP |
1007 | if (log_on_console()) |
1008 | return; | |
1009 | ||
877d54e9 LP |
1010 | /* We log status messages for all units and all operations. */ |
1011 | ||
1012 | format = unit_get_status_message_format_try_harder(u, t); | |
1013 | if (!format) | |
1014 | return; | |
1015 | ||
1016 | snprintf(buf, sizeof(buf), format, unit_description(u)); | |
1017 | char_array_0(buf); | |
1018 | ||
1019 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1020 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1021 | SD_MESSAGE_UNIT_RELOADING; | |
1022 | ||
1023 | log_struct(LOG_INFO, | |
1024 | "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(mid), | |
1025 | "UNIT=%s", u->id, | |
1026 | "MESSAGE=%s", buf, | |
1027 | NULL); | |
1028 | } | |
1029 | #pragma GCC diagnostic pop | |
1030 | ||
87f0e418 | 1031 | /* Errors: |
d5159713 LP |
1032 | * -EBADR: This unit type does not support starting. |
1033 | * -EALREADY: Unit is already started. | |
1034 | * -EAGAIN: An operation is already in progress. Retry later. | |
1035 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
1036 | */ |
1037 | int unit_start(Unit *u) { | |
1038 | UnitActiveState state; | |
92ab323c | 1039 | Unit *following; |
87f0e418 LP |
1040 | |
1041 | assert(u); | |
1042 | ||
ac155bb8 | 1043 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1044 | return -EINVAL; |
1045 | ||
a82e5507 LP |
1046 | /* If this is already started, then this will succeed. Note |
1047 | * that this will even succeed if this unit is not startable | |
1048 | * by the user. This is relied on to detect when we need to | |
1049 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1050 | state = unit_active_state(u); |
1051 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1052 | return -EALREADY; | |
1053 | ||
a82e5507 LP |
1054 | /* If the conditions failed, don't do anything at all. If we |
1055 | * already are activating this call might still be useful to | |
1056 | * speed up activation in case there is some hold-off time, | |
1057 | * but we don't want to recheck the condition in that case. */ | |
1058 | if (state != UNIT_ACTIVATING && | |
1059 | !unit_condition_test(u)) { | |
ac155bb8 | 1060 | log_debug("Starting of %s requested but condition failed. Ignoring.", u->id); |
52661efd LP |
1061 | return -EALREADY; |
1062 | } | |
1063 | ||
92ab323c LP |
1064 | /* Forward to the main object, if we aren't it. */ |
1065 | if ((following = unit_following(u))) { | |
ac155bb8 | 1066 | log_debug("Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1067 | return unit_start(following); |
1068 | } | |
1069 | ||
877d54e9 LP |
1070 | unit_status_log_starting_stopping_reloading(u, JOB_START); |
1071 | unit_status_print_starting_stopping(u, JOB_START); | |
c6918296 | 1072 | |
92ab323c LP |
1073 | /* If it is stopped, but we cannot start it, then fail */ |
1074 | if (!UNIT_VTABLE(u)->start) | |
1075 | return -EBADR; | |
1076 | ||
87f0e418 LP |
1077 | /* We don't suppress calls to ->start() here when we are |
1078 | * already starting, to allow this request to be used as a | |
1079 | * "hurry up" call, for example when the unit is in some "auto | |
1080 | * restart" state where it waits for a holdoff timer to elapse | |
1081 | * before it will start again. */ | |
1082 | ||
c1e1601e | 1083 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1084 | |
87f0e418 LP |
1085 | return UNIT_VTABLE(u)->start(u); |
1086 | } | |
1087 | ||
1088 | bool unit_can_start(Unit *u) { | |
1089 | assert(u); | |
1090 | ||
1091 | return !!UNIT_VTABLE(u)->start; | |
1092 | } | |
1093 | ||
2528a7a6 LP |
1094 | bool unit_can_isolate(Unit *u) { |
1095 | assert(u); | |
1096 | ||
1097 | return unit_can_start(u) && | |
ac155bb8 | 1098 | u->allow_isolate; |
2528a7a6 LP |
1099 | } |
1100 | ||
87f0e418 LP |
1101 | /* Errors: |
1102 | * -EBADR: This unit type does not support stopping. | |
1103 | * -EALREADY: Unit is already stopped. | |
1104 | * -EAGAIN: An operation is already in progress. Retry later. | |
1105 | */ | |
1106 | int unit_stop(Unit *u) { | |
1107 | UnitActiveState state; | |
92ab323c | 1108 | Unit *following; |
87f0e418 LP |
1109 | |
1110 | assert(u); | |
1111 | ||
87f0e418 | 1112 | state = unit_active_state(u); |
fdf20a31 | 1113 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1114 | return -EALREADY; |
1115 | ||
92ab323c | 1116 | if ((following = unit_following(u))) { |
ac155bb8 | 1117 | log_debug("Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1118 | return unit_stop(following); |
1119 | } | |
1120 | ||
877d54e9 LP |
1121 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); |
1122 | unit_status_print_starting_stopping(u, JOB_STOP); | |
c6918296 | 1123 | |
7898b0cf LP |
1124 | if (!UNIT_VTABLE(u)->stop) |
1125 | return -EBADR; | |
1126 | ||
c1e1601e | 1127 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1128 | |
87f0e418 LP |
1129 | return UNIT_VTABLE(u)->stop(u); |
1130 | } | |
1131 | ||
1132 | /* Errors: | |
1133 | * -EBADR: This unit type does not support reloading. | |
1134 | * -ENOEXEC: Unit is not started. | |
1135 | * -EAGAIN: An operation is already in progress. Retry later. | |
1136 | */ | |
1137 | int unit_reload(Unit *u) { | |
1138 | UnitActiveState state; | |
92ab323c | 1139 | Unit *following; |
87f0e418 LP |
1140 | |
1141 | assert(u); | |
1142 | ||
ac155bb8 | 1143 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1144 | return -EINVAL; |
1145 | ||
87f0e418 LP |
1146 | if (!unit_can_reload(u)) |
1147 | return -EBADR; | |
1148 | ||
1149 | state = unit_active_state(u); | |
e364ad06 | 1150 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1151 | return -EALREADY; |
1152 | ||
e364ad06 | 1153 | if (state != UNIT_ACTIVE) |
87f0e418 LP |
1154 | return -ENOEXEC; |
1155 | ||
92ab323c | 1156 | if ((following = unit_following(u))) { |
ac155bb8 | 1157 | log_debug("Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1158 | return unit_reload(following); |
1159 | } | |
1160 | ||
877d54e9 LP |
1161 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); |
1162 | ||
c1e1601e | 1163 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1164 | return UNIT_VTABLE(u)->reload(u); |
1165 | } | |
1166 | ||
1167 | bool unit_can_reload(Unit *u) { | |
1168 | assert(u); | |
1169 | ||
1170 | if (!UNIT_VTABLE(u)->reload) | |
1171 | return false; | |
1172 | ||
1173 | if (!UNIT_VTABLE(u)->can_reload) | |
1174 | return true; | |
1175 | ||
1176 | return UNIT_VTABLE(u)->can_reload(u); | |
1177 | } | |
1178 | ||
b4a16b7b | 1179 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1180 | Iterator i; |
1181 | Unit *other; | |
1182 | ||
1183 | assert(u); | |
1184 | ||
1185 | /* If this service shall be shut down when unneeded then do | |
1186 | * so. */ | |
1187 | ||
ac155bb8 | 1188 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1189 | return; |
1190 | ||
1191 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1192 | return; | |
1193 | ||
ac155bb8 | 1194 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
f60c2665 | 1195 | if (unit_pending_active(other)) |
f3bff0eb LP |
1196 | return; |
1197 | ||
ac155bb8 | 1198 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
f60c2665 | 1199 | if (unit_pending_active(other)) |
f3bff0eb LP |
1200 | return; |
1201 | ||
ac155bb8 | 1202 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
f60c2665 | 1203 | if (unit_pending_active(other)) |
f3bff0eb LP |
1204 | return; |
1205 | ||
ac155bb8 | 1206 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
f60c2665 | 1207 | if (unit_pending_active(other)) |
b81884e7 LP |
1208 | return; |
1209 | ||
ac155bb8 | 1210 | log_info("Service %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1211 | |
1212 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1213 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1214 | } |
1215 | ||
87f0e418 LP |
1216 | static void retroactively_start_dependencies(Unit *u) { |
1217 | Iterator i; | |
1218 | Unit *other; | |
1219 | ||
1220 | assert(u); | |
1221 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1222 | ||
ac155bb8 MS |
1223 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1224 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1225 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1226 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1227 | |
7f2cddae | 1228 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1229 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1230 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1231 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1232 | |
ac155bb8 MS |
1233 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1234 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1235 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1236 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1237 | |
ac155bb8 MS |
1238 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
1239 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1240 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1241 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1242 | |
ac155bb8 MS |
1243 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1244 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1245 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1246 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1247 | |
ac155bb8 | 1248 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1249 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1250 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1251 | |
ac155bb8 | 1252 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1253 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1254 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1255 | } |
1256 | ||
1257 | static void retroactively_stop_dependencies(Unit *u) { | |
1258 | Iterator i; | |
1259 | Unit *other; | |
1260 | ||
1261 | assert(u); | |
1262 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1263 | ||
b81884e7 | 1264 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1265 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1266 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1267 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1268 | } |
1269 | ||
1270 | static void check_unneeded_dependencies(Unit *u) { | |
1271 | Iterator i; | |
1272 | Unit *other; | |
1273 | ||
1274 | assert(u); | |
1275 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1276 | |
1277 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1278 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1279 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1280 | unit_check_unneeded(other); |
ac155bb8 | 1281 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1282 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1283 | unit_check_unneeded(other); |
ac155bb8 | 1284 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1285 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1286 | unit_check_unneeded(other); |
ac155bb8 | 1287 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1288 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1289 | unit_check_unneeded(other); |
ac155bb8 | 1290 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1291 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1292 | unit_check_unneeded(other); |
7f2cddae | 1293 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1294 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1295 | unit_check_unneeded(other); | |
87f0e418 LP |
1296 | } |
1297 | ||
c0daa706 LP |
1298 | void unit_trigger_on_failure(Unit *u) { |
1299 | Unit *other; | |
1300 | Iterator i; | |
1301 | ||
1302 | assert(u); | |
1303 | ||
ac155bb8 | 1304 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1305 | return; |
1306 | ||
ac155bb8 | 1307 | log_info("Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1308 | |
ac155bb8 | 1309 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1310 | int r; |
1311 | ||
ac155bb8 | 1312 | if ((r = manager_add_job(u->manager, JOB_START, other, u->on_failure_isolate ? JOB_ISOLATE : JOB_REPLACE, true, NULL, NULL)) < 0) |
222ae6a8 LP |
1313 | log_error("Failed to enqueue OnFailure= job: %s", strerror(-r)); |
1314 | } | |
c0daa706 LP |
1315 | } |
1316 | ||
e2f3b44c | 1317 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
7e6e7b06 | 1318 | bool unexpected; |
a096ed36 | 1319 | |
87f0e418 LP |
1320 | assert(u); |
1321 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1322 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1323 | |
8e471ccd LP |
1324 | /* Note that this is called for all low-level state changes, |
1325 | * even if they might map to the same high-level | |
1326 | * UnitActiveState! That means that ns == os is OK an expected | |
1327 | * behaviour here. For example: if a mount point is remounted | |
cd6d0a45 | 1328 | * this function will be called too! */ |
87f0e418 | 1329 | |
ac155bb8 | 1330 | if (u->manager->n_reloading <= 0) { |
bdbf9951 | 1331 | dual_timestamp ts; |
173e3821 | 1332 | |
bdbf9951 | 1333 | dual_timestamp_get(&ts); |
173e3821 | 1334 | |
bdbf9951 | 1335 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1336 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1337 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1338 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1339 | |
1340 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1341 | u->active_enter_timestamp = ts; |
bdbf9951 | 1342 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1343 | u->active_exit_timestamp = ts; |
bdbf9951 LP |
1344 | |
1345 | timer_unit_notify(u, ns); | |
1346 | path_unit_notify(u, ns); | |
1347 | } | |
87f0e418 | 1348 | |
fdf20a31 | 1349 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1350 | cgroup_bonding_trim_list(u->cgroup_bondings, true); |
fb385181 | 1351 | |
ac155bb8 | 1352 | if (u->job) { |
7e6e7b06 | 1353 | unexpected = false; |
87f0e418 | 1354 | |
ac155bb8 | 1355 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1356 | |
1357 | /* So we reached a different state for this | |
1358 | * job. Let's see if we can run it now if it | |
1359 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1360 | job_add_to_run_queue(u->job); |
87f0e418 | 1361 | |
b410e6b9 | 1362 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1363 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1364 | * hence needs to invalidate jobs. */ |
87f0e418 | 1365 | |
ac155bb8 | 1366 | switch (u->job->type) { |
87f0e418 | 1367 | |
b410e6b9 LP |
1368 | case JOB_START: |
1369 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1370 | |
b410e6b9 | 1371 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1372 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1373 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1374 | unexpected = true; |
41b02ec7 | 1375 | |
fdf20a31 | 1376 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1377 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1378 | } |
87f0e418 | 1379 | |
b410e6b9 | 1380 | break; |
87f0e418 | 1381 | |
b410e6b9 LP |
1382 | case JOB_RELOAD: |
1383 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1384 | |
ac155bb8 | 1385 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1386 | if (ns == UNIT_ACTIVE) |
5273510e | 1387 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1388 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1389 | unexpected = true; |
41b02ec7 | 1390 | |
fdf20a31 | 1391 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1392 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1393 | } |
b410e6b9 | 1394 | } |
87f0e418 | 1395 | |
b410e6b9 | 1396 | break; |
87f0e418 | 1397 | |
b410e6b9 LP |
1398 | case JOB_STOP: |
1399 | case JOB_RESTART: | |
1400 | case JOB_TRY_RESTART: | |
87f0e418 | 1401 | |
fdf20a31 | 1402 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1403 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1404 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1405 | unexpected = true; |
5273510e | 1406 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1407 | } |
87f0e418 | 1408 | |
b410e6b9 | 1409 | break; |
87f0e418 | 1410 | |
b410e6b9 LP |
1411 | default: |
1412 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1413 | } |
87f0e418 | 1414 | |
7e6e7b06 LP |
1415 | } else |
1416 | unexpected = true; | |
1417 | ||
ac155bb8 | 1418 | if (u->manager->n_reloading <= 0) { |
f3bff0eb | 1419 | |
bdbf9951 LP |
1420 | /* If this state change happened without being |
1421 | * requested by a job, then let's retroactively start | |
1422 | * or stop dependencies. We skip that step when | |
1423 | * deserializing, since we don't want to create any | |
1424 | * additional jobs just because something is already | |
1425 | * activated. */ | |
1426 | ||
1427 | if (unexpected) { | |
1428 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1429 | retroactively_start_dependencies(u); | |
1430 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1431 | retroactively_stop_dependencies(u); | |
1432 | } | |
5de9682c | 1433 | |
cd0504d0 MS |
1434 | /* stop unneeded units regardless if going down was expected or not */ |
1435 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1436 | check_unneeded_dependencies(u); | |
1437 | ||
bdbf9951 | 1438 | if (ns != os && ns == UNIT_FAILED) { |
ac155bb8 | 1439 | log_notice("Unit %s entered failed state.", u->id); |
bdbf9951 | 1440 | unit_trigger_on_failure(u); |
cd6d0a45 | 1441 | } |
3b2775c5 | 1442 | } |
e537352b | 1443 | |
3b2775c5 LP |
1444 | /* Some names are special */ |
1445 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1446 | ||
1447 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1448 | /* The bus just might have become available, | |
1449 | * hence try to connect to it, if we aren't | |
1450 | * yet connected. */ | |
ac155bb8 | 1451 | bus_init(u->manager, true); |
3b2775c5 | 1452 | |
ac155bb8 | 1453 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1454 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
ac155bb8 | 1455 | u->manager->n_reloading <= 0) { |
3b2775c5 | 1456 | /* Write audit record if we have just finished starting up */ |
ac155bb8 MS |
1457 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, true); |
1458 | u->in_audit = true; | |
3b2775c5 | 1459 | } |
e983b760 | 1460 | |
3b2775c5 | 1461 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
ac155bb8 | 1462 | manager_send_unit_plymouth(u->manager, u); |
bdbf9951 | 1463 | |
3b2775c5 | 1464 | } else { |
bdbf9951 | 1465 | |
3b2775c5 LP |
1466 | /* We don't care about D-Bus here, since we'll get an |
1467 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1468 | |
ac155bb8 | 1469 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1470 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1471 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
ac155bb8 | 1472 | u->manager->n_reloading <= 0) { |
4927fcae | 1473 | |
3b2775c5 LP |
1474 | /* Hmm, if there was no start record written |
1475 | * write it now, so that we always have a nice | |
1476 | * pair */ | |
ac155bb8 MS |
1477 | if (!u->in_audit) { |
1478 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); | |
cd6d0a45 | 1479 | |
3b2775c5 | 1480 | if (ns == UNIT_INACTIVE) |
ac155bb8 | 1481 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1482 | } else |
1483 | /* Write audit record if we have just finished shutting down */ | |
ac155bb8 | 1484 | manager_send_unit_audit(u->manager, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1485 | |
ac155bb8 | 1486 | u->in_audit = false; |
cd6d0a45 | 1487 | } |
f278026d LP |
1488 | } |
1489 | ||
ac155bb8 | 1490 | manager_recheck_journal(u->manager); |
3b2775c5 | 1491 | |
f3bff0eb LP |
1492 | /* Maybe we finished startup and are now ready for being |
1493 | * stopped because unneeded? */ | |
b4a16b7b | 1494 | unit_check_unneeded(u); |
c1e1601e LP |
1495 | |
1496 | unit_add_to_dbus_queue(u); | |
701cc384 | 1497 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1498 | } |
1499 | ||
acbb0225 | 1500 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
1501 | struct epoll_event ev; |
1502 | ||
1503 | assert(u); | |
1504 | assert(fd >= 0); | |
acbb0225 | 1505 | assert(w); |
ea430986 | 1506 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
1507 | |
1508 | zero(ev); | |
acbb0225 | 1509 | ev.data.ptr = w; |
87f0e418 LP |
1510 | ev.events = events; |
1511 | ||
ac155bb8 | 1512 | if (epoll_ctl(u->manager->epoll_fd, |
acbb0225 LP |
1513 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, |
1514 | fd, | |
1515 | &ev) < 0) | |
1516 | return -errno; | |
87f0e418 | 1517 | |
acbb0225 LP |
1518 | w->fd = fd; |
1519 | w->type = WATCH_FD; | |
ea430986 | 1520 | w->data.unit = u; |
87f0e418 | 1521 | |
acbb0225 | 1522 | return 0; |
87f0e418 LP |
1523 | } |
1524 | ||
acbb0225 | 1525 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1526 | assert(u); |
acbb0225 | 1527 | assert(w); |
87f0e418 | 1528 | |
acbb0225 LP |
1529 | if (w->type == WATCH_INVALID) |
1530 | return; | |
1531 | ||
ea430986 LP |
1532 | assert(w->type == WATCH_FD); |
1533 | assert(w->data.unit == u); | |
ac155bb8 | 1534 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
acbb0225 LP |
1535 | |
1536 | w->fd = -1; | |
1537 | w->type = WATCH_INVALID; | |
ea430986 | 1538 | w->data.unit = NULL; |
87f0e418 LP |
1539 | } |
1540 | ||
1541 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1542 | assert(u); | |
1543 | assert(pid >= 1); | |
1544 | ||
05e343b7 LP |
1545 | /* Watch a specific PID. We only support one unit watching |
1546 | * each PID for now. */ | |
1547 | ||
ac155bb8 | 1548 | return hashmap_put(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1549 | } |
1550 | ||
1551 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1552 | assert(u); | |
1553 | assert(pid >= 1); | |
1554 | ||
ac155bb8 | 1555 | hashmap_remove_value(u->manager->watch_pids, LONG_TO_PTR(pid), u); |
87f0e418 LP |
1556 | } |
1557 | ||
acbb0225 | 1558 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1559 | struct itimerspec its; |
acbb0225 | 1560 | int flags, fd; |
87f0e418 LP |
1561 | bool ours; |
1562 | ||
1563 | assert(u); | |
acbb0225 | 1564 | assert(w); |
faf919f1 | 1565 | assert(w->type == WATCH_INVALID || (w->type == WATCH_UNIT_TIMER && w->data.unit == u)); |
87f0e418 LP |
1566 | |
1567 | /* This will try to reuse the old timer if there is one */ | |
1568 | ||
faf919f1 LP |
1569 | if (w->type == WATCH_UNIT_TIMER) { |
1570 | assert(w->data.unit == u); | |
1571 | assert(w->fd >= 0); | |
1572 | ||
87f0e418 | 1573 | ours = false; |
acbb0225 | 1574 | fd = w->fd; |
faf919f1 LP |
1575 | } else if (w->type == WATCH_INVALID) { |
1576 | ||
87f0e418 | 1577 | ours = true; |
87f0e418 LP |
1578 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1579 | return -errno; | |
faf919f1 LP |
1580 | } else |
1581 | assert_not_reached("Invalid watch type"); | |
87f0e418 LP |
1582 | |
1583 | zero(its); | |
1584 | ||
1585 | if (delay <= 0) { | |
1586 | /* Set absolute time in the past, but not 0, since we | |
1587 | * don't want to disarm the timer */ | |
1588 | its.it_value.tv_sec = 0; | |
1589 | its.it_value.tv_nsec = 1; | |
1590 | ||
1591 | flags = TFD_TIMER_ABSTIME; | |
1592 | } else { | |
1593 | timespec_store(&its.it_value, delay); | |
1594 | flags = 0; | |
1595 | } | |
1596 | ||
1597 | /* This will also flush the elapse counter */ | |
1598 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1599 | goto fail; | |
1600 | ||
acbb0225 LP |
1601 | if (w->type == WATCH_INVALID) { |
1602 | struct epoll_event ev; | |
87f0e418 | 1603 | |
acbb0225 LP |
1604 | zero(ev); |
1605 | ev.data.ptr = w; | |
f94ea366 | 1606 | ev.events = EPOLLIN; |
acbb0225 | 1607 | |
ac155bb8 | 1608 | if (epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) |
acbb0225 LP |
1609 | goto fail; |
1610 | } | |
1611 | ||
faf919f1 | 1612 | w->type = WATCH_UNIT_TIMER; |
acbb0225 | 1613 | w->fd = fd; |
ea430986 | 1614 | w->data.unit = u; |
87f0e418 | 1615 | |
87f0e418 LP |
1616 | return 0; |
1617 | ||
1618 | fail: | |
1619 | if (ours) | |
ea430986 | 1620 | close_nointr_nofail(fd); |
87f0e418 LP |
1621 | |
1622 | return -errno; | |
1623 | } | |
1624 | ||
acbb0225 | 1625 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1626 | assert(u); |
acbb0225 | 1627 | assert(w); |
87f0e418 | 1628 | |
acbb0225 | 1629 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1630 | return; |
1631 | ||
faf919f1 LP |
1632 | assert(w->type == WATCH_UNIT_TIMER); |
1633 | assert(w->data.unit == u); | |
1634 | assert(w->fd >= 0); | |
acbb0225 | 1635 | |
ac155bb8 | 1636 | assert_se(epoll_ctl(u->manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
a16e1123 | 1637 | close_nointr_nofail(w->fd); |
acbb0225 LP |
1638 | |
1639 | w->fd = -1; | |
1640 | w->type = WATCH_INVALID; | |
ea430986 | 1641 | w->data.unit = NULL; |
87f0e418 LP |
1642 | } |
1643 | ||
1644 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1645 | assert(u); | |
1646 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1647 | ||
1648 | switch (j) { | |
1649 | ||
1650 | case JOB_VERIFY_ACTIVE: | |
1651 | case JOB_START: | |
57339f47 | 1652 | case JOB_STOP: |
e0209d83 | 1653 | case JOB_NOP: |
87f0e418 LP |
1654 | return true; |
1655 | ||
87f0e418 LP |
1656 | case JOB_RESTART: |
1657 | case JOB_TRY_RESTART: | |
1658 | return unit_can_start(u); | |
1659 | ||
1660 | case JOB_RELOAD: | |
1661 | return unit_can_reload(u); | |
1662 | ||
1663 | case JOB_RELOAD_OR_START: | |
1664 | return unit_can_reload(u) && unit_can_start(u); | |
1665 | ||
1666 | default: | |
1667 | assert_not_reached("Invalid job type"); | |
1668 | } | |
1669 | } | |
1670 | ||
701cc384 | 1671 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1672 | |
1673 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1674 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1675 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1676 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1677 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1678 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 1679 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 1680 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 1681 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1682 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1683 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 1684 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 1685 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
1686 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1687 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1688 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1689 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1690 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 1691 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
1692 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
1693 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 1694 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 1695 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 1696 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
87f0e418 | 1697 | }; |
701cc384 | 1698 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1699 | |
1700 | assert(u); | |
1701 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1702 | assert(other); |
1703 | ||
9f151f29 LP |
1704 | u = unit_follow_merge(u); |
1705 | other = unit_follow_merge(other); | |
1706 | ||
87f0e418 LP |
1707 | /* We won't allow dependencies on ourselves. We will not |
1708 | * consider them an error however. */ | |
1709 | if (u == other) | |
1710 | return 0; | |
1711 | ||
ac155bb8 | 1712 | if ((r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) |
87f0e418 LP |
1713 | return r; |
1714 | ||
5de9682c | 1715 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1716 | if ((r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) |
5de9682c LP |
1717 | return r; |
1718 | ||
701cc384 | 1719 | if (add_reference) |
ac155bb8 MS |
1720 | if ((r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func)) < 0 || |
1721 | (r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func)) < 0) | |
701cc384 | 1722 | return r; |
87f0e418 | 1723 | |
ac155bb8 | 1724 | if ((q = set_put(u->dependencies[d], other)) < 0) |
701cc384 | 1725 | return q; |
87f0e418 | 1726 | |
5de9682c | 1727 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) |
ac155bb8 | 1728 | if ((v = set_put(other->dependencies[inverse_table[d]], u)) < 0) { |
5de9682c LP |
1729 | r = v; |
1730 | goto fail; | |
1731 | } | |
701cc384 LP |
1732 | |
1733 | if (add_reference) { | |
ac155bb8 | 1734 | if ((w = set_put(u->dependencies[UNIT_REFERENCES], other)) < 0) { |
701cc384 LP |
1735 | r = w; |
1736 | goto fail; | |
1737 | } | |
1738 | ||
ac155bb8 | 1739 | if ((r = set_put(other->dependencies[UNIT_REFERENCED_BY], u)) < 0) |
701cc384 | 1740 | goto fail; |
87f0e418 LP |
1741 | } |
1742 | ||
c1e1601e | 1743 | unit_add_to_dbus_queue(u); |
87f0e418 | 1744 | return 0; |
701cc384 LP |
1745 | |
1746 | fail: | |
1747 | if (q > 0) | |
ac155bb8 | 1748 | set_remove(u->dependencies[d], other); |
701cc384 LP |
1749 | |
1750 | if (v > 0) | |
ac155bb8 | 1751 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
1752 | |
1753 | if (w > 0) | |
ac155bb8 | 1754 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
1755 | |
1756 | return r; | |
87f0e418 | 1757 | } |
0301abf4 | 1758 | |
2c966c03 LP |
1759 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
1760 | int r; | |
1761 | ||
1762 | assert(u); | |
1763 | ||
1764 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
1765 | return r; | |
1766 | ||
1767 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
1768 | return r; | |
1769 | ||
1770 | return 0; | |
1771 | } | |
1772 | ||
9e2f7c11 LP |
1773 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
1774 | char *s; | |
1775 | ||
1776 | assert(u); | |
1777 | assert(name || path); | |
1778 | ||
1779 | if (!name) | |
9eb977db | 1780 | name = path_get_file_name(path); |
9e2f7c11 LP |
1781 | |
1782 | if (!unit_name_is_template(name)) { | |
1783 | *p = NULL; | |
1784 | return name; | |
1785 | } | |
1786 | ||
ac155bb8 MS |
1787 | if (u->instance) |
1788 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 LP |
1789 | else { |
1790 | char *i; | |
1791 | ||
ac155bb8 | 1792 | if (!(i = unit_name_to_prefix(u->id))) |
9e2f7c11 LP |
1793 | return NULL; |
1794 | ||
1795 | s = unit_name_replace_instance(name, i); | |
1796 | free(i); | |
1797 | } | |
1798 | ||
1799 | if (!s) | |
1800 | return NULL; | |
1801 | ||
1802 | *p = s; | |
1803 | return s; | |
1804 | } | |
1805 | ||
701cc384 | 1806 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
1807 | Unit *other; |
1808 | int r; | |
9e2f7c11 | 1809 | char *s; |
09b6b09f | 1810 | |
9e2f7c11 LP |
1811 | assert(u); |
1812 | assert(name || path); | |
09b6b09f | 1813 | |
9e2f7c11 LP |
1814 | if (!(name = resolve_template(u, name, path, &s))) |
1815 | return -ENOMEM; | |
09b6b09f | 1816 | |
ac155bb8 | 1817 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1818 | goto finish; |
1819 | ||
701cc384 | 1820 | r = unit_add_dependency(u, d, other, add_reference); |
9e2f7c11 LP |
1821 | |
1822 | finish: | |
1823 | free(s); | |
1824 | return r; | |
09b6b09f LP |
1825 | } |
1826 | ||
2c966c03 LP |
1827 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1828 | Unit *other; | |
1829 | int r; | |
1830 | char *s; | |
1831 | ||
1832 | assert(u); | |
1833 | assert(name || path); | |
1834 | ||
1835 | if (!(name = resolve_template(u, name, path, &s))) | |
1836 | return -ENOMEM; | |
1837 | ||
ac155bb8 | 1838 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1839 | goto finish; |
1840 | ||
1841 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
1842 | ||
1843 | finish: | |
1844 | free(s); | |
1845 | return r; | |
1846 | } | |
1847 | ||
701cc384 | 1848 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
1849 | Unit *other; |
1850 | int r; | |
9e2f7c11 | 1851 | char *s; |
bd77d0fc | 1852 | |
9e2f7c11 LP |
1853 | assert(u); |
1854 | assert(name || path); | |
bd77d0fc | 1855 | |
9e2f7c11 LP |
1856 | if (!(name = resolve_template(u, name, path, &s))) |
1857 | return -ENOMEM; | |
bd77d0fc | 1858 | |
ac155bb8 | 1859 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
9e2f7c11 LP |
1860 | goto finish; |
1861 | ||
701cc384 | 1862 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 LP |
1863 | |
1864 | finish: | |
1865 | free(s); | |
1866 | return r; | |
bd77d0fc LP |
1867 | } |
1868 | ||
2c966c03 LP |
1869 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
1870 | Unit *other; | |
1871 | int r; | |
1872 | char *s; | |
1873 | ||
1874 | assert(u); | |
1875 | assert(name || path); | |
1876 | ||
1877 | if (!(name = resolve_template(u, name, path, &s))) | |
1878 | return -ENOMEM; | |
1879 | ||
ac155bb8 | 1880 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
2c966c03 LP |
1881 | goto finish; |
1882 | ||
1883 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
1884 | goto finish; | |
1885 | ||
1886 | finish: | |
1887 | free(s); | |
1888 | return r; | |
1889 | } | |
1890 | ||
0301abf4 LP |
1891 | int set_unit_path(const char *p) { |
1892 | char *cwd, *c; | |
1893 | int r; | |
1894 | ||
1895 | /* This is mostly for debug purposes */ | |
1896 | ||
1897 | if (path_is_absolute(p)) { | |
1898 | if (!(c = strdup(p))) | |
1899 | return -ENOMEM; | |
1900 | } else { | |
1901 | if (!(cwd = get_current_dir_name())) | |
1902 | return -errno; | |
1903 | ||
1904 | r = asprintf(&c, "%s/%s", cwd, p); | |
1905 | free(cwd); | |
1906 | ||
1907 | if (r < 0) | |
1908 | return -ENOMEM; | |
1909 | } | |
1910 | ||
036643a2 | 1911 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1912 | r = -errno; |
1913 | free(c); | |
1914 | return r; | |
1915 | } | |
1916 | ||
1917 | return 0; | |
1918 | } | |
88066b3a | 1919 | |
ea430986 | 1920 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
1921 | assert(u); |
1922 | ||
ac155bb8 | 1923 | if (!u->id) |
04ade7d2 LP |
1924 | return NULL; |
1925 | ||
48899192 | 1926 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
1927 | } |
1928 | ||
8e274523 | 1929 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
8e274523 LP |
1930 | int r; |
1931 | ||
1932 | assert(u); | |
1933 | assert(b); | |
35d2e7ec | 1934 | |
8e274523 LP |
1935 | assert(b->path); |
1936 | ||
e025b4c3 | 1937 | if (!b->controller) { |
35d2e7ec LP |
1938 | if (!(b->controller = strdup(SYSTEMD_CGROUP_CONTROLLER))) |
1939 | return -ENOMEM; | |
1940 | ||
e025b4c3 LP |
1941 | b->ours = true; |
1942 | } | |
1943 | ||
8e274523 LP |
1944 | /* Ensure this hasn't been added yet */ |
1945 | assert(!b->unit); | |
1946 | ||
d686d8a9 LP |
1947 | if (streq(b->controller, SYSTEMD_CGROUP_CONTROLLER)) { |
1948 | CGroupBonding *l; | |
8e274523 | 1949 | |
ac155bb8 | 1950 | l = hashmap_get(u->manager->cgroup_bondings, b->path); |
d686d8a9 LP |
1951 | LIST_PREPEND(CGroupBonding, by_path, l, b); |
1952 | ||
ac155bb8 | 1953 | if ((r = hashmap_replace(u->manager->cgroup_bondings, b->path, l)) < 0) { |
d686d8a9 LP |
1954 | LIST_REMOVE(CGroupBonding, by_path, l, b); |
1955 | return r; | |
1956 | } | |
8e274523 LP |
1957 | } |
1958 | ||
ac155bb8 | 1959 | LIST_PREPEND(CGroupBonding, by_unit, u->cgroup_bondings, b); |
8e274523 LP |
1960 | b->unit = u; |
1961 | ||
1962 | return 0; | |
1963 | } | |
1964 | ||
013b87c0 LP |
1965 | static char *default_cgroup_path(Unit *u) { |
1966 | char *p; | |
1967 | ||
1968 | assert(u); | |
1969 | ||
ac155bb8 | 1970 | if (u->instance) { |
4f2d528d | 1971 | char *t; |
013b87c0 | 1972 | |
ac155bb8 | 1973 | t = unit_name_template(u->id); |
cd0ed1db | 1974 | if (!t) |
4f2d528d LP |
1975 | return NULL; |
1976 | ||
b7def684 | 1977 | p = strjoin(u->manager->cgroup_hierarchy, "/", t, "/", u->instance, NULL); |
4f2d528d LP |
1978 | free(t); |
1979 | } else | |
b7def684 | 1980 | p = strjoin(u->manager->cgroup_hierarchy, "/", u->id, NULL); |
4f2d528d | 1981 | |
cd0ed1db | 1982 | return p; |
013b87c0 LP |
1983 | } |
1984 | ||
8e274523 | 1985 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
013b87c0 LP |
1986 | char *controller = NULL, *path = NULL; |
1987 | CGroupBonding *b = NULL; | |
e025b4c3 | 1988 | bool ours = false; |
8e274523 LP |
1989 | int r; |
1990 | ||
1991 | assert(u); | |
1992 | assert(name); | |
1993 | ||
35d2e7ec LP |
1994 | if ((r = cg_split_spec(name, &controller, &path)) < 0) |
1995 | return r; | |
8e274523 | 1996 | |
e025b4c3 | 1997 | if (!path) { |
35d2e7ec | 1998 | path = default_cgroup_path(u); |
e025b4c3 LP |
1999 | ours = true; |
2000 | } | |
013b87c0 | 2001 | |
e025b4c3 | 2002 | if (!controller) { |
55096547 | 2003 | controller = strdup(SYSTEMD_CGROUP_CONTROLLER); |
e025b4c3 LP |
2004 | ours = true; |
2005 | } | |
013b87c0 | 2006 | |
35d2e7ec LP |
2007 | if (!path || !controller) { |
2008 | free(path); | |
2009 | free(controller); | |
2010 | ||
2011 | return -ENOMEM; | |
8e274523 LP |
2012 | } |
2013 | ||
ac155bb8 | 2014 | if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) { |
013b87c0 LP |
2015 | r = -EEXIST; |
2016 | goto fail; | |
2017 | } | |
8e274523 | 2018 | |
013b87c0 | 2019 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
2020 | r = -ENOMEM; |
2021 | goto fail; | |
2022 | } | |
2023 | ||
013b87c0 LP |
2024 | b->controller = controller; |
2025 | b->path = path; | |
e025b4c3 LP |
2026 | b->ours = ours; |
2027 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
8e274523 LP |
2028 | |
2029 | if ((r = unit_add_cgroup(u, b)) < 0) | |
2030 | goto fail; | |
2031 | ||
2032 | return 0; | |
2033 | ||
2034 | fail: | |
013b87c0 LP |
2035 | free(path); |
2036 | free(controller); | |
8e274523 LP |
2037 | free(b); |
2038 | ||
2039 | return r; | |
2040 | } | |
2041 | ||
06d4c99a | 2042 | static int unit_add_one_default_cgroup(Unit *u, const char *controller) { |
d686d8a9 | 2043 | CGroupBonding *b = NULL; |
8e274523 LP |
2044 | int r = -ENOMEM; |
2045 | ||
2046 | assert(u); | |
2047 | ||
06d4c99a LP |
2048 | if (!controller) |
2049 | controller = SYSTEMD_CGROUP_CONTROLLER; | |
8e274523 | 2050 | |
ac155bb8 | 2051 | if (cgroup_bonding_find_list(u->cgroup_bondings, controller)) |
06d4c99a | 2052 | return 0; |
8e274523 | 2053 | |
06d4c99a LP |
2054 | if (!(b = new0(CGroupBonding, 1))) |
2055 | return -ENOMEM; | |
8e274523 | 2056 | |
06d4c99a LP |
2057 | if (!(b->controller = strdup(controller))) |
2058 | goto fail; | |
d686d8a9 | 2059 | |
06d4c99a LP |
2060 | if (!(b->path = default_cgroup_path(u))) |
2061 | goto fail; | |
d686d8a9 | 2062 | |
06d4c99a LP |
2063 | b->ours = true; |
2064 | b->essential = streq(controller, SYSTEMD_CGROUP_CONTROLLER); | |
d686d8a9 | 2065 | |
06d4c99a LP |
2066 | if ((r = unit_add_cgroup(u, b)) < 0) |
2067 | goto fail; | |
8e274523 LP |
2068 | |
2069 | return 0; | |
2070 | ||
2071 | fail: | |
06d4c99a LP |
2072 | free(b->path); |
2073 | free(b->controller); | |
2074 | free(b); | |
8e274523 LP |
2075 | |
2076 | return r; | |
2077 | } | |
2078 | ||
06d4c99a | 2079 | int unit_add_default_cgroups(Unit *u) { |
ab1f0633 | 2080 | CGroupAttribute *a; |
06d4c99a LP |
2081 | char **c; |
2082 | int r; | |
ab1f0633 | 2083 | |
06d4c99a LP |
2084 | assert(u); |
2085 | ||
2086 | /* Adds in the default cgroups, if they weren't specified | |
2087 | * otherwise. */ | |
2088 | ||
ac155bb8 | 2089 | if (!u->manager->cgroup_hierarchy) |
df18d8c8 LP |
2090 | return 0; |
2091 | ||
06d4c99a LP |
2092 | if ((r = unit_add_one_default_cgroup(u, NULL)) < 0) |
2093 | return r; | |
2094 | ||
ac155bb8 | 2095 | STRV_FOREACH(c, u->manager->default_controllers) |
ab1f0633 LP |
2096 | unit_add_one_default_cgroup(u, *c); |
2097 | ||
ac155bb8 | 2098 | LIST_FOREACH(by_unit, a, u->cgroup_attributes) |
ab1f0633 | 2099 | unit_add_one_default_cgroup(u, a->controller); |
06d4c99a LP |
2100 | |
2101 | return 0; | |
2102 | } | |
2103 | ||
8e274523 LP |
2104 | CGroupBonding* unit_get_default_cgroup(Unit *u) { |
2105 | assert(u); | |
2106 | ||
ac155bb8 | 2107 | return cgroup_bonding_find_list(u->cgroup_bondings, SYSTEMD_CGROUP_CONTROLLER); |
8e274523 LP |
2108 | } |
2109 | ||
ab1f0633 LP |
2110 | int unit_add_cgroup_attribute(Unit *u, const char *controller, const char *name, const char *value, CGroupAttributeMapCallback map_callback) { |
2111 | int r; | |
2112 | char *c = NULL; | |
2113 | CGroupAttribute *a; | |
2114 | ||
2115 | assert(u); | |
2116 | assert(name); | |
2117 | assert(value); | |
2118 | ||
2119 | if (!controller) { | |
2120 | const char *dot; | |
2121 | ||
2122 | dot = strchr(name, '.'); | |
2123 | if (!dot) | |
2124 | return -EINVAL; | |
2125 | ||
2126 | c = strndup(name, dot - name); | |
2127 | if (!c) | |
2128 | return -ENOMEM; | |
2129 | ||
2130 | controller = c; | |
2131 | } | |
2132 | ||
2133 | if (streq(controller, SYSTEMD_CGROUP_CONTROLLER)) { | |
2134 | r = -EINVAL; | |
2135 | goto finish; | |
2136 | } | |
2137 | ||
2138 | a = new0(CGroupAttribute, 1); | |
2139 | if (!a) { | |
2140 | r = -ENOMEM; | |
2141 | goto finish; | |
2142 | } | |
2143 | ||
2144 | if (c) { | |
2145 | a->controller = c; | |
2146 | c = NULL; | |
2147 | } else | |
2148 | a->controller = strdup(controller); | |
2149 | ||
2150 | a->name = strdup(name); | |
2151 | a->value = strdup(value); | |
2152 | ||
2153 | if (!a->controller || !a->name || !a->value) { | |
2154 | free(a->controller); | |
2155 | free(a->name); | |
2156 | free(a->value); | |
2157 | free(a); | |
2158 | ||
2159 | return -ENOMEM; | |
2160 | } | |
2161 | ||
2162 | a->map_callback = map_callback; | |
2163 | ||
ac155bb8 | 2164 | LIST_PREPEND(CGroupAttribute, by_unit, u->cgroup_attributes, a); |
ab1f0633 LP |
2165 | |
2166 | r = 0; | |
2167 | ||
2168 | finish: | |
2169 | free(c); | |
2170 | return r; | |
2171 | } | |
2172 | ||
f6ff8c29 LP |
2173 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
2174 | char *t; | |
2175 | int r; | |
2176 | ||
2177 | assert(u); | |
2178 | assert(type); | |
2179 | assert(_found); | |
2180 | ||
ac155bb8 | 2181 | if (!(t = unit_name_change_suffix(u->id, type))) |
f6ff8c29 LP |
2182 | return -ENOMEM; |
2183 | ||
2184 | assert(!unit_has_name(u, t)); | |
2185 | ||
ac155bb8 | 2186 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
f6ff8c29 LP |
2187 | free(t); |
2188 | ||
9e2f7c11 | 2189 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2190 | |
2191 | return r; | |
2192 | } | |
2193 | ||
a16e1123 LP |
2194 | int unit_get_related_unit(Unit *u, const char *type, Unit **_found) { |
2195 | Unit *found; | |
2196 | char *t; | |
2197 | ||
2198 | assert(u); | |
2199 | assert(type); | |
2200 | assert(_found); | |
2201 | ||
ac155bb8 | 2202 | if (!(t = unit_name_change_suffix(u->id, type))) |
a16e1123 LP |
2203 | return -ENOMEM; |
2204 | ||
2205 | assert(!unit_has_name(u, t)); | |
2206 | ||
ac155bb8 | 2207 | found = manager_get_unit(u->manager, t); |
a16e1123 LP |
2208 | free(t); |
2209 | ||
2210 | if (!found) | |
2211 | return -ENOENT; | |
2212 | ||
2213 | *_found = found; | |
2214 | return 0; | |
2215 | } | |
2216 | ||
9e2f7c11 LP |
2217 | static char *specifier_prefix_and_instance(char specifier, void *data, void *userdata) { |
2218 | Unit *u = userdata; | |
2219 | assert(u); | |
2220 | ||
ac155bb8 | 2221 | return unit_name_to_prefix_and_instance(u->id); |
9e2f7c11 LP |
2222 | } |
2223 | ||
2224 | static char *specifier_prefix(char specifier, void *data, void *userdata) { | |
2225 | Unit *u = userdata; | |
2226 | assert(u); | |
2227 | ||
ac155bb8 | 2228 | return unit_name_to_prefix(u->id); |
9e2f7c11 LP |
2229 | } |
2230 | ||
2231 | static char *specifier_prefix_unescaped(char specifier, void *data, void *userdata) { | |
2232 | Unit *u = userdata; | |
2233 | char *p, *r; | |
2234 | ||
2235 | assert(u); | |
2236 | ||
ac155bb8 | 2237 | if (!(p = unit_name_to_prefix(u->id))) |
9e2f7c11 LP |
2238 | return NULL; |
2239 | ||
2240 | r = unit_name_unescape(p); | |
2241 | free(p); | |
2242 | ||
2243 | return r; | |
2244 | } | |
2245 | ||
2246 | static char *specifier_instance_unescaped(char specifier, void *data, void *userdata) { | |
2247 | Unit *u = userdata; | |
2248 | assert(u); | |
2249 | ||
ac155bb8 MS |
2250 | if (u->instance) |
2251 | return unit_name_unescape(u->instance); | |
9e2f7c11 LP |
2252 | |
2253 | return strdup(""); | |
2254 | } | |
2255 | ||
9fc50704 LP |
2256 | static char *specifier_filename(char specifier, void *data, void *userdata) { |
2257 | Unit *u = userdata; | |
2258 | assert(u); | |
2259 | ||
ac155bb8 MS |
2260 | if (u->instance) |
2261 | return unit_name_path_unescape(u->instance); | |
9fc50704 | 2262 | |
ac155bb8 | 2263 | return unit_name_to_path(u->instance); |
9fc50704 LP |
2264 | } |
2265 | ||
0aef4345 LP |
2266 | static char *specifier_cgroup(char specifier, void *data, void *userdata) { |
2267 | Unit *u = userdata; | |
2268 | assert(u); | |
2269 | ||
2270 | return default_cgroup_path(u); | |
2271 | } | |
2272 | ||
2273 | static char *specifier_cgroup_root(char specifier, void *data, void *userdata) { | |
2274 | Unit *u = userdata; | |
2275 | char *p; | |
2276 | assert(u); | |
2277 | ||
2278 | if (specifier == 'r') | |
ac155bb8 | 2279 | return strdup(u->manager->cgroup_hierarchy); |
0aef4345 | 2280 | |
9eb977db | 2281 | if (path_get_parent(u->manager->cgroup_hierarchy, &p) < 0) |
0aef4345 LP |
2282 | return strdup(""); |
2283 | ||
2284 | if (streq(p, "/")) { | |
2285 | free(p); | |
2286 | return strdup(""); | |
2287 | } | |
2288 | ||
2289 | return p; | |
2290 | } | |
2291 | ||
2292 | static char *specifier_runtime(char specifier, void *data, void *userdata) { | |
2293 | Unit *u = userdata; | |
2294 | assert(u); | |
2295 | ||
ac155bb8 | 2296 | if (u->manager->running_as == MANAGER_USER) { |
0aef4345 LP |
2297 | const char *e; |
2298 | ||
2299 | e = getenv("XDG_RUNTIME_DIR"); | |
2300 | if (e) | |
2301 | return strdup(e); | |
2302 | } | |
2303 | ||
2304 | return strdup("/run"); | |
2305 | } | |
2306 | ||
b2896c90 AK |
2307 | static char *specifier_user_name(char specifier, void *data, void *userdata) { |
2308 | Service *s = userdata; | |
2309 | int r; | |
2310 | const char *username; | |
2311 | ||
2312 | /* get USER env from our own env if set */ | |
2313 | if (!s->exec_context.user) | |
2314 | return getusername_malloc(); | |
2315 | ||
2316 | /* fish username from passwd */ | |
2317 | username = s->exec_context.user; | |
d05c5031 | 2318 | r = get_user_creds(&username, NULL, NULL, NULL, NULL); |
b2896c90 AK |
2319 | if (r < 0) |
2320 | return NULL; | |
2321 | ||
2322 | return strdup(username); | |
2323 | } | |
2324 | ||
2325 | static char *specifier_user_home(char specifier, void *data, void *userdata) { | |
2326 | Service *s = userdata; | |
2327 | int r; | |
2328 | const char *username, *home; | |
2329 | ||
2330 | /* return HOME if set, otherwise from passwd */ | |
2331 | if (!s->exec_context.user) { | |
2332 | char *h; | |
2333 | ||
2334 | r = get_home_dir(&h); | |
2335 | if (r < 0) | |
2336 | return NULL; | |
2337 | ||
2338 | return h; | |
2339 | } | |
2340 | ||
2341 | username = s->exec_context.user; | |
d05c5031 | 2342 | r = get_user_creds(&username, NULL, NULL, &home, NULL); |
b2896c90 AK |
2343 | if (r < 0) |
2344 | return NULL; | |
2345 | ||
2346 | return strdup(home); | |
2347 | } | |
2348 | ||
d05c5031 LP |
2349 | static char *specifier_user_shell(char specifier, void *data, void *userdata) { |
2350 | Service *s = userdata; | |
2351 | int r; | |
2352 | const char *username, *shell; | |
2353 | ||
2354 | /* return HOME if set, otherwise from passwd */ | |
2355 | if (!s->exec_context.user) { | |
2356 | char *sh; | |
2357 | ||
2358 | r = get_shell(&sh); | |
2359 | if (r < 0) | |
2360 | return strdup("/bin/sh"); | |
2361 | ||
2362 | return sh; | |
2363 | } | |
2364 | ||
2365 | username = s->exec_context.user; | |
2366 | r = get_user_creds(&username, NULL, NULL, NULL, &shell); | |
2367 | if (r < 0) | |
2368 | return strdup("/bin/sh"); | |
2369 | ||
2370 | return strdup(shell); | |
2371 | } | |
2372 | ||
9e2f7c11 LP |
2373 | char *unit_name_printf(Unit *u, const char* format) { |
2374 | ||
2375 | /* | |
2376 | * This will use the passed string as format string and | |
2377 | * replace the following specifiers: | |
2378 | * | |
2379 | * %n: the full id of the unit (foo@bar.waldo) | |
2380 | * %N: the id of the unit without the suffix (foo@bar) | |
2381 | * %p: the prefix (foo) | |
2382 | * %i: the instance (bar) | |
2383 | */ | |
2384 | ||
2385 | const Specifier table[] = { | |
ac155bb8 | 2386 | { 'n', specifier_string, u->id }, |
9e2f7c11 LP |
2387 | { 'N', specifier_prefix_and_instance, NULL }, |
2388 | { 'p', specifier_prefix, NULL }, | |
ac155bb8 | 2389 | { 'i', specifier_string, u->instance }, |
9e2f7c11 LP |
2390 | { 0, NULL, NULL } |
2391 | }; | |
2392 | ||
2393 | assert(u); | |
2394 | assert(format); | |
2395 | ||
2396 | return specifier_printf(format, table, u); | |
2397 | } | |
2398 | ||
2399 | char *unit_full_printf(Unit *u, const char *format) { | |
2400 | ||
2401 | /* This is similar to unit_name_printf() but also supports | |
0aef4345 LP |
2402 | * unescaping. Also, adds a couple of additional codes: |
2403 | * | |
2404 | * %c cgroup path of unit | |
2405 | * %r root cgroup path of this systemd instance (e.g. "/user/lennart/shared/systemd-4711") | |
2406 | * %R parent of root cgroup path (e.g. "/usr/lennart/shared") | |
2407 | * %t the runtime directory to place sockets in (e.g. "/run" or $XDG_RUNTIME_DIR) | |
b2896c90 AK |
2408 | * %u the username of the configured User or running user |
2409 | * %h the homedir of the configured User or running user | |
0aef4345 | 2410 | */ |
9e2f7c11 LP |
2411 | |
2412 | const Specifier table[] = { | |
ac155bb8 | 2413 | { 'n', specifier_string, u->id }, |
9e2f7c11 LP |
2414 | { 'N', specifier_prefix_and_instance, NULL }, |
2415 | { 'p', specifier_prefix, NULL }, | |
2416 | { 'P', specifier_prefix_unescaped, NULL }, | |
ac155bb8 | 2417 | { 'i', specifier_string, u->instance }, |
9e2f7c11 | 2418 | { 'I', specifier_instance_unescaped, NULL }, |
9fc50704 | 2419 | { 'f', specifier_filename, NULL }, |
0aef4345 LP |
2420 | { 'c', specifier_cgroup, NULL }, |
2421 | { 'r', specifier_cgroup_root, NULL }, | |
2422 | { 'R', specifier_cgroup_root, NULL }, | |
2423 | { 't', specifier_runtime, NULL }, | |
b2896c90 AK |
2424 | { 'u', specifier_user_name, NULL }, |
2425 | { 'h', specifier_user_home, NULL }, | |
d05c5031 | 2426 | { 's', specifier_user_shell, NULL }, |
9e2f7c11 LP |
2427 | { 0, NULL, NULL } |
2428 | }; | |
2429 | ||
2430 | assert(u); | |
2431 | assert(format); | |
2432 | ||
2433 | return specifier_printf(format, table, u); | |
2434 | } | |
2435 | ||
2436 | char **unit_full_printf_strv(Unit *u, char **l) { | |
2437 | size_t n; | |
2438 | char **r, **i, **j; | |
2439 | ||
2440 | /* Applies unit_full_printf to every entry in l */ | |
2441 | ||
2442 | assert(u); | |
2443 | ||
2444 | n = strv_length(l); | |
2445 | if (!(r = new(char*, n+1))) | |
2446 | return NULL; | |
2447 | ||
2448 | for (i = l, j = r; *i; i++, j++) | |
2449 | if (!(*j = unit_full_printf(u, *i))) | |
2450 | goto fail; | |
2451 | ||
2452 | *j = NULL; | |
2453 | return r; | |
2454 | ||
2455 | fail: | |
da19d5c1 | 2456 | for (j--; j >= r; j--) |
9e2f7c11 LP |
2457 | free(*j); |
2458 | ||
2459 | free(r); | |
2460 | ||
2461 | return NULL; | |
2462 | } | |
2463 | ||
05e343b7 LP |
2464 | int unit_watch_bus_name(Unit *u, const char *name) { |
2465 | assert(u); | |
2466 | assert(name); | |
2467 | ||
2468 | /* Watch a specific name on the bus. We only support one unit | |
2469 | * watching each name for now. */ | |
2470 | ||
ac155bb8 | 2471 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2472 | } |
2473 | ||
2474 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2475 | assert(u); | |
2476 | assert(name); | |
2477 | ||
ac155bb8 | 2478 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2479 | } |
2480 | ||
a16e1123 LP |
2481 | bool unit_can_serialize(Unit *u) { |
2482 | assert(u); | |
2483 | ||
2484 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2485 | } | |
2486 | ||
6b78f9b4 | 2487 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2488 | int r; |
2489 | ||
2490 | assert(u); | |
2491 | assert(f); | |
2492 | assert(fds); | |
2493 | ||
2494 | if (!unit_can_serialize(u)) | |
2495 | return 0; | |
2496 | ||
2497 | if ((r = UNIT_VTABLE(u)->serialize(u, f, fds)) < 0) | |
2498 | return r; | |
2499 | ||
cca098b0 | 2500 | |
6b78f9b4 LP |
2501 | if (serialize_jobs) { |
2502 | if (u->job) { | |
2503 | fprintf(f, "job\n"); | |
2504 | job_serialize(u->job, f, fds); | |
2505 | } | |
2506 | ||
2507 | if (u->nop_job) { | |
2508 | fprintf(f, "job\n"); | |
2509 | job_serialize(u->nop_job, f, fds); | |
2510 | } | |
e0209d83 MS |
2511 | } |
2512 | ||
ac155bb8 MS |
2513 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2514 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2515 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2516 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2517 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
2791a8f8 | 2518 | |
ac155bb8 MS |
2519 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2520 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2521 | |
a16e1123 LP |
2522 | /* End marker */ |
2523 | fputc('\n', f); | |
2524 | return 0; | |
2525 | } | |
2526 | ||
2527 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2528 | va_list ap; | |
2529 | ||
2530 | assert(u); | |
2531 | assert(f); | |
2532 | assert(key); | |
2533 | assert(format); | |
2534 | ||
2535 | fputs(key, f); | |
2536 | fputc('=', f); | |
2537 | ||
2538 | va_start(ap, format); | |
2539 | vfprintf(f, format, ap); | |
2540 | va_end(ap); | |
2541 | ||
2542 | fputc('\n', f); | |
2543 | } | |
2544 | ||
2545 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2546 | assert(u); | |
2547 | assert(f); | |
2548 | assert(key); | |
2549 | assert(value); | |
2550 | ||
2551 | fprintf(f, "%s=%s\n", key, value); | |
2552 | } | |
2553 | ||
2554 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
2555 | int r; | |
2556 | ||
2557 | assert(u); | |
2558 | assert(f); | |
2559 | assert(fds); | |
2560 | ||
2561 | if (!unit_can_serialize(u)) | |
2562 | return 0; | |
2563 | ||
2564 | for (;;) { | |
20c03b7b | 2565 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2566 | size_t k; |
2567 | ||
2568 | if (!fgets(line, sizeof(line), f)) { | |
2569 | if (feof(f)) | |
2570 | return 0; | |
2571 | return -errno; | |
2572 | } | |
2573 | ||
10f8e83c | 2574 | char_array_0(line); |
a16e1123 LP |
2575 | l = strstrip(line); |
2576 | ||
2577 | /* End marker */ | |
2578 | if (l[0] == 0) | |
2579 | return 0; | |
2580 | ||
2581 | k = strcspn(l, "="); | |
2582 | ||
2583 | if (l[k] == '=') { | |
2584 | l[k] = 0; | |
2585 | v = l+k+1; | |
2586 | } else | |
2587 | v = l+k; | |
2588 | ||
cca098b0 | 2589 | if (streq(l, "job")) { |
39a18c60 MS |
2590 | if (v[0] == '\0') { |
2591 | /* new-style serialized job */ | |
2592 | Job *j = job_new_raw(u); | |
2593 | if (!j) | |
2594 | return -ENOMEM; | |
2595 | ||
2596 | r = job_deserialize(j, f, fds); | |
2597 | if (r < 0) { | |
2598 | job_free(j); | |
2599 | return r; | |
2600 | } | |
cca098b0 | 2601 | |
39a18c60 MS |
2602 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2603 | if (r < 0) { | |
2604 | job_free(j); | |
2605 | return r; | |
2606 | } | |
e0209d83 MS |
2607 | |
2608 | r = job_install_deserialized(j); | |
2609 | if (r < 0) { | |
2610 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2611 | job_free(j); | |
2612 | return r; | |
2613 | } | |
39a18c60 MS |
2614 | } else { |
2615 | /* legacy */ | |
2616 | JobType type = job_type_from_string(v); | |
2617 | if (type < 0) | |
2618 | log_debug("Failed to parse job type value %s", v); | |
2619 | else | |
2620 | u->deserialized_job = type; | |
2621 | } | |
cca098b0 | 2622 | continue; |
8aaf019b | 2623 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2624 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2625 | continue; |
2626 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2627 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2628 | continue; |
2629 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2630 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2631 | continue; |
2632 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2633 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2634 | continue; |
2791a8f8 | 2635 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2636 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 LP |
2637 | continue; |
2638 | } else if (streq(l, "condition-result")) { | |
2639 | int b; | |
2640 | ||
2641 | if ((b = parse_boolean(v)) < 0) | |
2642 | log_debug("Failed to parse condition result value %s", v); | |
2643 | else | |
ac155bb8 | 2644 | u->condition_result = b; |
efbac6d2 LP |
2645 | |
2646 | continue; | |
8aaf019b | 2647 | } |
cca098b0 | 2648 | |
a16e1123 LP |
2649 | if ((r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds)) < 0) |
2650 | return r; | |
2651 | } | |
2652 | } | |
2653 | ||
6e2ef85b LP |
2654 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2655 | Unit *device; | |
2656 | char *e; | |
2657 | int r; | |
2658 | ||
2659 | assert(u); | |
2660 | ||
2661 | if (!what) | |
2662 | return 0; | |
2663 | ||
2664 | /* Adds in links to the device node that this unit is based on */ | |
2665 | ||
8407a5d0 | 2666 | if (!is_device_path(what)) |
6e2ef85b LP |
2667 | return 0; |
2668 | ||
35eb6b12 LP |
2669 | e = unit_name_from_path(what, ".device"); |
2670 | if (!e) | |
6e2ef85b LP |
2671 | return -ENOMEM; |
2672 | ||
ac155bb8 | 2673 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2674 | free(e); |
2675 | ||
2676 | if (r < 0) | |
2677 | return r; | |
2678 | ||
7f2cddae | 2679 | if ((r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true)) < 0) |
6e2ef85b LP |
2680 | return r; |
2681 | ||
2682 | if (wants) | |
2683 | if ((r = unit_add_dependency(device, UNIT_WANTS, u, false)) < 0) | |
2684 | return r; | |
2685 | ||
2686 | return 0; | |
2687 | } | |
a16e1123 | 2688 | |
cca098b0 LP |
2689 | int unit_coldplug(Unit *u) { |
2690 | int r; | |
2691 | ||
2692 | assert(u); | |
2693 | ||
2694 | if (UNIT_VTABLE(u)->coldplug) | |
2695 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2696 | return r; | |
2697 | ||
39a18c60 MS |
2698 | if (u->job) { |
2699 | r = job_coldplug(u->job); | |
2700 | if (r < 0) | |
2701 | return r; | |
2702 | } else if (u->deserialized_job >= 0) { | |
2703 | /* legacy */ | |
2704 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2705 | if (r < 0) | |
cca098b0 LP |
2706 | return r; |
2707 | ||
ac155bb8 | 2708 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2709 | } |
2710 | ||
2711 | return 0; | |
2712 | } | |
2713 | ||
5831e9b7 | 2714 | void unit_status_printf(Unit *u, const char *status, const char *format, ...) { |
9e58ff9c LP |
2715 | va_list ap; |
2716 | ||
2717 | assert(u); | |
2718 | assert(format); | |
2719 | ||
ac155bb8 | 2720 | if (!manager_get_show_status(u->manager)) |
9e58ff9c LP |
2721 | return; |
2722 | ||
ac155bb8 | 2723 | if (!manager_is_booting_or_shutting_down(u->manager)) |
9e58ff9c LP |
2724 | return; |
2725 | ||
2726 | va_start(ap, format); | |
67e5cc4f | 2727 | status_vprintf(status, true, format, ap); |
9e58ff9c LP |
2728 | va_end(ap); |
2729 | } | |
2730 | ||
45fb0699 | 2731 | bool unit_need_daemon_reload(Unit *u) { |
1b64d026 LP |
2732 | struct stat st; |
2733 | ||
45fb0699 LP |
2734 | assert(u); |
2735 | ||
ac155bb8 | 2736 | if (u->fragment_path) { |
5f4b19f4 | 2737 | zero(st); |
ac155bb8 | 2738 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2739 | /* What, cannot access this anymore? */ |
2740 | return true; | |
45fb0699 | 2741 | |
ac155bb8 MS |
2742 | if (u->fragment_mtime > 0 && |
2743 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2744 | return true; |
2745 | } | |
2746 | ||
1b64d026 LP |
2747 | if (u->source_path) { |
2748 | zero(st); | |
2749 | if (stat(u->source_path, &st) < 0) | |
2750 | return true; | |
2751 | ||
2752 | if (u->source_mtime > 0 && | |
2753 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2754 | return true; | |
2755 | } | |
5f4b19f4 LP |
2756 | |
2757 | return false; | |
45fb0699 LP |
2758 | } |
2759 | ||
fdf20a31 | 2760 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2761 | assert(u); |
2762 | ||
fdf20a31 MM |
2763 | if (UNIT_VTABLE(u)->reset_failed) |
2764 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2765 | } |
2766 | ||
a7f241db LP |
2767 | Unit *unit_following(Unit *u) { |
2768 | assert(u); | |
2769 | ||
2770 | if (UNIT_VTABLE(u)->following) | |
2771 | return UNIT_VTABLE(u)->following(u); | |
2772 | ||
2773 | return NULL; | |
2774 | } | |
2775 | ||
18ffdfda LP |
2776 | bool unit_pending_inactive(Unit *u) { |
2777 | assert(u); | |
2778 | ||
2779 | /* Returns true if the unit is inactive or going down */ | |
2780 | ||
2781 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) | |
2782 | return true; | |
2783 | ||
ac155bb8 | 2784 | if (u->job && u->job->type == JOB_STOP) |
18ffdfda LP |
2785 | return true; |
2786 | ||
2787 | return false; | |
2788 | } | |
2789 | ||
f976f3f6 LP |
2790 | bool unit_pending_active(Unit *u) { |
2791 | assert(u); | |
2792 | ||
f60c2665 | 2793 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2794 | |
2795 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2796 | return true; | |
2797 | ||
ac155bb8 MS |
2798 | if (u->job && |
2799 | (u->job->type == JOB_START || | |
2800 | u->job->type == JOB_RELOAD_OR_START || | |
2801 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2802 | return true; |
2803 | ||
2804 | return false; | |
2805 | } | |
2806 | ||
c74f17d9 | 2807 | int unit_kill(Unit *u, KillWho w, int signo, DBusError *error) { |
8a0867d6 LP |
2808 | assert(u); |
2809 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2810 | assert(signo > 0); |
2811 | assert(signo < _NSIG); | |
2812 | ||
8a0867d6 LP |
2813 | if (!UNIT_VTABLE(u)->kill) |
2814 | return -ENOTSUP; | |
2815 | ||
c74f17d9 | 2816 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2817 | } |
2818 | ||
6210e7fc LP |
2819 | int unit_following_set(Unit *u, Set **s) { |
2820 | assert(u); | |
2821 | assert(s); | |
2822 | ||
2823 | if (UNIT_VTABLE(u)->following_set) | |
2824 | return UNIT_VTABLE(u)->following_set(u, s); | |
2825 | ||
2826 | *s = NULL; | |
2827 | return 0; | |
2828 | } | |
2829 | ||
a4375746 LP |
2830 | UnitFileState unit_get_unit_file_state(Unit *u) { |
2831 | assert(u); | |
2832 | ||
ac155bb8 MS |
2833 | if (u->unit_file_state < 0 && u->fragment_path) |
2834 | u->unit_file_state = unit_file_get_state( | |
2835 | u->manager->running_as == MANAGER_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, | |
9eb977db | 2836 | NULL, path_get_file_name(u->fragment_path)); |
a4375746 | 2837 | |
ac155bb8 | 2838 | return u->unit_file_state; |
a4375746 LP |
2839 | } |
2840 | ||
57020a3a LP |
2841 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
2842 | assert(ref); | |
2843 | assert(u); | |
2844 | ||
2845 | if (ref->unit) | |
2846 | unit_ref_unset(ref); | |
2847 | ||
2848 | ref->unit = u; | |
ac155bb8 | 2849 | LIST_PREPEND(UnitRef, refs, u->refs, ref); |
57020a3a LP |
2850 | return u; |
2851 | } | |
2852 | ||
2853 | void unit_ref_unset(UnitRef *ref) { | |
2854 | assert(ref); | |
2855 | ||
2856 | if (!ref->unit) | |
2857 | return; | |
2858 | ||
ac155bb8 | 2859 | LIST_REMOVE(UnitRef, refs, ref->unit->refs, ref); |
57020a3a LP |
2860 | ref->unit = NULL; |
2861 | } | |
2862 | ||
7c8fa05c LP |
2863 | int unit_add_one_mount_link(Unit *u, Mount *m) { |
2864 | char **i; | |
2865 | ||
2866 | assert(u); | |
2867 | assert(m); | |
2868 | ||
2869 | if (u->load_state != UNIT_LOADED || | |
2870 | UNIT(m)->load_state != UNIT_LOADED) | |
2871 | return 0; | |
2872 | ||
2873 | STRV_FOREACH(i, u->requires_mounts_for) { | |
2874 | ||
2875 | if (UNIT(m) == u) | |
2876 | continue; | |
2877 | ||
2878 | if (!path_startswith(*i, m->where)) | |
2879 | continue; | |
2880 | ||
2881 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT(m), true); | |
2882 | } | |
2883 | ||
2884 | return 0; | |
2885 | } | |
2886 | ||
2887 | int unit_add_mount_links(Unit *u) { | |
2888 | Unit *other; | |
2889 | int r; | |
2890 | ||
2891 | assert(u); | |
2892 | ||
2893 | LIST_FOREACH(units_by_type, other, u->manager->units_by_type[UNIT_MOUNT]) { | |
2894 | r = unit_add_one_mount_link(u, MOUNT(other)); | |
2895 | if (r < 0) | |
2896 | return r; | |
2897 | } | |
2898 | ||
2899 | return 0; | |
2900 | } | |
2901 | ||
cba6e062 LP |
2902 | int unit_exec_context_defaults(Unit *u, ExecContext *c) { |
2903 | unsigned i; | |
2904 | int r; | |
2905 | ||
e06c73cc LP |
2906 | assert(u); |
2907 | assert(c); | |
2908 | ||
cba6e062 | 2909 | /* This only copies in the ones that need memory */ |
e06c73cc | 2910 | |
cba6e062 LP |
2911 | for (i = 0; i < RLIMIT_NLIMITS; i++) |
2912 | if (u->manager->rlimit[i] && !c->rlimit[i]) { | |
2913 | c->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
2914 | if (!c->rlimit[i]) | |
2915 | return -ENOMEM; | |
2916 | } | |
2917 | ||
2918 | if (u->manager->running_as == MANAGER_USER && | |
2919 | !c->working_directory) { | |
e06c73cc | 2920 | |
cba6e062 LP |
2921 | r = get_home_dir(&c->working_directory); |
2922 | if (r < 0) | |
2923 | return r; | |
2924 | } | |
2925 | ||
2926 | return 0; | |
e06c73cc LP |
2927 | } |
2928 | ||
94f04347 LP |
2929 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
2930 | [UNIT_ACTIVE] = "active", | |
032ff4af | 2931 | [UNIT_RELOADING] = "reloading", |
94f04347 | 2932 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 2933 | [UNIT_FAILED] = "failed", |
94f04347 LP |
2934 | [UNIT_ACTIVATING] = "activating", |
2935 | [UNIT_DEACTIVATING] = "deactivating" | |
2936 | }; | |
2937 | ||
2938 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
2939 | ||
2940 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
2941 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 2942 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 | 2943 | [UNIT_REQUISITE] = "Requisite", |
9e2f7c11 | 2944 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
ac6a4abe MS |
2945 | [UNIT_WANTS] = "Wants", |
2946 | [UNIT_BINDS_TO] = "BindsTo", | |
2947 | [UNIT_PART_OF] = "PartOf", | |
94f04347 | 2948 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 2949 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 | 2950 | [UNIT_WANTED_BY] = "WantedBy", |
ac6a4abe MS |
2951 | [UNIT_BOUND_BY] = "BoundBy", |
2952 | [UNIT_CONSISTS_OF] = "ConsistsOf", | |
94f04347 | 2953 | [UNIT_CONFLICTS] = "Conflicts", |
69dd2852 | 2954 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
94f04347 LP |
2955 | [UNIT_BEFORE] = "Before", |
2956 | [UNIT_AFTER] = "After", | |
57020a3a LP |
2957 | [UNIT_ON_FAILURE] = "OnFailure", |
2958 | [UNIT_TRIGGERS] = "Triggers", | |
4dcc1cb4 | 2959 | [UNIT_TRIGGERED_BY] = "TriggeredBy", |
7f2cddae | 2960 | [UNIT_PROPAGATES_RELOAD_TO] = "PropagatesReloadTo", |
ac6a4abe MS |
2961 | [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom", |
2962 | [UNIT_REFERENCES] = "References", | |
2963 | [UNIT_REFERENCED_BY] = "ReferencedBy", | |
94f04347 LP |
2964 | }; |
2965 | ||
2966 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |