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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
87f0e418 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
87f0e418 LP |
22 | #include <assert.h> |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <sys/epoll.h> | |
26 | #include <sys/timerfd.h> | |
27 | #include <sys/poll.h> | |
0301abf4 LP |
28 | #include <stdlib.h> |
29 | #include <unistd.h> | |
45fb0699 | 30 | #include <sys/stat.h> |
87f0e418 | 31 | |
718db961 LP |
32 | #include "sd-id128.h" |
33 | #include "sd-messages.h" | |
87f0e418 LP |
34 | #include "set.h" |
35 | #include "unit.h" | |
36 | #include "macro.h" | |
37 | #include "strv.h" | |
9eb977db | 38 | #include "path-util.h" |
87f0e418 LP |
39 | #include "load-fragment.h" |
40 | #include "load-dropin.h" | |
41 | #include "log.h" | |
9e2f7c11 | 42 | #include "unit-name.h" |
4139c1b2 | 43 | #include "dbus-unit.h" |
514f4ef5 | 44 | #include "special.h" |
c6c18be3 | 45 | #include "cgroup-util.h" |
4927fcae | 46 | #include "missing.h" |
71645aca | 47 | #include "mkdir.h" |
a5c32cff HH |
48 | #include "label.h" |
49 | #include "fileio-label.h" | |
96aad8d1 | 50 | #include "bus-common-errors.h" |
718db961 | 51 | #include "dbus.h" |
613b411c | 52 | #include "execute.h" |
bc6aed7b | 53 | #include "virt.h" |
29686440 | 54 | #include "dropin.h" |
87f0e418 LP |
55 | |
56 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
57 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 58 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 59 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 | 60 | [UNIT_TARGET] = &target_vtable, |
e821075a | 61 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
87f0e418 LP |
62 | [UNIT_DEVICE] = &device_vtable, |
63 | [UNIT_MOUNT] = &mount_vtable, | |
64 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 65 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 66 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 67 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
68 | [UNIT_SLICE] = &slice_vtable, |
69 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
70 | }; |
71 | ||
d1fab3fe ZJS |
72 | static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency); |
73 | ||
7d17cfbc | 74 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
75 | Unit *u; |
76 | ||
77 | assert(m); | |
ac155bb8 | 78 | assert(size >= sizeof(Unit)); |
87f0e418 | 79 | |
7d17cfbc MS |
80 | u = malloc0(size); |
81 | if (!u) | |
87f0e418 LP |
82 | return NULL; |
83 | ||
d5099efc | 84 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 85 | if (!u->names) { |
87f0e418 LP |
86 | free(u); |
87 | return NULL; | |
88 | } | |
89 | ||
ac155bb8 MS |
90 | u->manager = m; |
91 | u->type = _UNIT_TYPE_INVALID; | |
92 | u->deserialized_job = _JOB_TYPE_INVALID; | |
93 | u->default_dependencies = true; | |
94 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 95 | u->unit_file_preset = -1; |
d420282b | 96 | u->on_failure_job_mode = JOB_REPLACE; |
87f0e418 LP |
97 | |
98 | return u; | |
99 | } | |
100 | ||
f278026d LP |
101 | bool unit_has_name(Unit *u, const char *name) { |
102 | assert(u); | |
103 | assert(name); | |
104 | ||
ac155bb8 | 105 | return !!set_get(u->names, (char*) name); |
f278026d LP |
106 | } |
107 | ||
598459ce LP |
108 | static void unit_init(Unit *u) { |
109 | CGroupContext *cc; | |
110 | ExecContext *ec; | |
111 | KillContext *kc; | |
112 | ||
113 | assert(u); | |
114 | assert(u->manager); | |
115 | assert(u->type >= 0); | |
116 | ||
117 | cc = unit_get_cgroup_context(u); | |
118 | if (cc) { | |
119 | cgroup_context_init(cc); | |
120 | ||
121 | /* Copy in the manager defaults into the cgroup | |
122 | * context, _before_ the rest of the settings have | |
123 | * been initialized */ | |
124 | ||
125 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
126 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
127 | cc->memory_accounting = u->manager->default_memory_accounting; | |
128 | } | |
129 | ||
130 | ec = unit_get_exec_context(u); | |
131 | if (ec) | |
132 | exec_context_init(ec); | |
133 | ||
134 | kc = unit_get_kill_context(u); | |
135 | if (kc) | |
136 | kill_context_init(kc); | |
137 | ||
138 | if (UNIT_VTABLE(u)->init) | |
139 | UNIT_VTABLE(u)->init(u); | |
140 | } | |
141 | ||
87f0e418 | 142 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 143 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 144 | UnitType t; |
87f0e418 LP |
145 | int r; |
146 | ||
147 | assert(u); | |
148 | assert(text); | |
149 | ||
9e2f7c11 | 150 | if (unit_name_is_template(text)) { |
598459ce | 151 | |
ac155bb8 | 152 | if (!u->instance) |
9e2f7c11 | 153 | return -EINVAL; |
87f0e418 | 154 | |
ac155bb8 | 155 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
156 | } else |
157 | s = strdup(text); | |
9e2f7c11 LP |
158 | if (!s) |
159 | return -ENOMEM; | |
87f0e418 | 160 | |
598459ce LP |
161 | if (!unit_name_is_valid(s, TEMPLATE_INVALID)) |
162 | return -EINVAL; | |
e537352b | 163 | |
9e2f7c11 | 164 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 165 | |
598459ce LP |
166 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
167 | return -EINVAL; | |
87f0e418 | 168 | |
e48614c4 ZJS |
169 | r = unit_name_to_instance(s, &i); |
170 | if (r < 0) | |
598459ce | 171 | return r; |
87f0e418 | 172 | |
598459ce LP |
173 | if (i && unit_vtable[t]->no_instances) |
174 | return -EINVAL; | |
9e2f7c11 | 175 | |
276c3e78 LP |
176 | /* Ensure that this unit is either instanced or not instanced, |
177 | * but not both. */ | |
598459ce LP |
178 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
179 | return -EINVAL; | |
9e2f7c11 LP |
180 | |
181 | if (unit_vtable[t]->no_alias && | |
ac155bb8 | 182 | !set_isempty(u->names) && |
598459ce LP |
183 | !set_get(u->names, s)) |
184 | return -EEXIST; | |
9e2f7c11 | 185 | |
598459ce LP |
186 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
187 | return -E2BIG; | |
4f0f902f | 188 | |
e48614c4 ZJS |
189 | r = set_put(u->names, s); |
190 | if (r < 0) { | |
9e2f7c11 | 191 | if (r == -EEXIST) |
598459ce LP |
192 | return 0; |
193 | ||
194 | return r; | |
87f0e418 LP |
195 | } |
196 | ||
e48614c4 ZJS |
197 | r = hashmap_put(u->manager->units, s, u); |
198 | if (r < 0) { | |
ac155bb8 | 199 | set_remove(u->names, s); |
598459ce | 200 | return r; |
87f0e418 LP |
201 | } |
202 | ||
ac155bb8 | 203 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
204 | u->type = t; |
205 | u->id = s; | |
206 | u->instance = i; | |
9e2f7c11 | 207 | |
71fda00f | 208 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 209 | |
598459ce | 210 | unit_init(u); |
87f0e418 | 211 | |
598459ce LP |
212 | i = NULL; |
213 | } | |
9e2f7c11 | 214 | |
598459ce | 215 | s = NULL; |
9e2f7c11 | 216 | |
598459ce LP |
217 | unit_add_to_dbus_queue(u); |
218 | return 0; | |
87f0e418 LP |
219 | } |
220 | ||
0ae97ec1 | 221 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 222 | _cleanup_free_ char *t = NULL; |
598459ce | 223 | char *s, *i; |
276c3e78 | 224 | int r; |
0ae97ec1 LP |
225 | |
226 | assert(u); | |
227 | assert(name); | |
228 | ||
9e2f7c11 LP |
229 | if (unit_name_is_template(name)) { |
230 | ||
ac155bb8 | 231 | if (!u->instance) |
9e2f7c11 LP |
232 | return -EINVAL; |
233 | ||
e48614c4 ZJS |
234 | t = unit_name_replace_instance(name, u->instance); |
235 | if (!t) | |
9e2f7c11 LP |
236 | return -ENOMEM; |
237 | ||
238 | name = t; | |
239 | } | |
240 | ||
0ae97ec1 | 241 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 242 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 243 | if (!s) |
0ae97ec1 LP |
244 | return -ENOENT; |
245 | ||
e48614c4 ZJS |
246 | r = unit_name_to_instance(s, &i); |
247 | if (r < 0) | |
276c3e78 LP |
248 | return r; |
249 | ||
ac155bb8 | 250 | u->id = s; |
276c3e78 | 251 | |
ac155bb8 MS |
252 | free(u->instance); |
253 | u->instance = i; | |
276c3e78 | 254 | |
c1e1601e | 255 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 256 | |
0ae97ec1 LP |
257 | return 0; |
258 | } | |
259 | ||
f50e0a01 LP |
260 | int unit_set_description(Unit *u, const char *description) { |
261 | char *s; | |
262 | ||
263 | assert(u); | |
264 | ||
8aec412f LP |
265 | if (isempty(description)) |
266 | s = NULL; | |
267 | else { | |
268 | s = strdup(description); | |
269 | if (!s) | |
270 | return -ENOMEM; | |
271 | } | |
f50e0a01 | 272 | |
ac155bb8 MS |
273 | free(u->description); |
274 | u->description = s; | |
c1e1601e LP |
275 | |
276 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
277 | return 0; |
278 | } | |
279 | ||
701cc384 LP |
280 | bool unit_check_gc(Unit *u) { |
281 | assert(u); | |
282 | ||
283 | if (UNIT_VTABLE(u)->no_gc) | |
284 | return true; | |
285 | ||
ac155bb8 | 286 | if (u->no_gc) |
6c073082 LP |
287 | return true; |
288 | ||
ac155bb8 | 289 | if (u->job) |
701cc384 LP |
290 | return true; |
291 | ||
e0209d83 MS |
292 | if (u->nop_job) |
293 | return true; | |
294 | ||
701cc384 LP |
295 | if (unit_active_state(u) != UNIT_INACTIVE) |
296 | return true; | |
297 | ||
9d576438 LP |
298 | if (u->refs) |
299 | return true; | |
300 | ||
701cc384 LP |
301 | if (UNIT_VTABLE(u)->check_gc) |
302 | if (UNIT_VTABLE(u)->check_gc(u)) | |
303 | return true; | |
304 | ||
305 | return false; | |
306 | } | |
307 | ||
87f0e418 LP |
308 | void unit_add_to_load_queue(Unit *u) { |
309 | assert(u); | |
ac155bb8 | 310 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 311 | |
ac155bb8 | 312 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
313 | return; |
314 | ||
71fda00f | 315 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 316 | u->in_load_queue = true; |
87f0e418 LP |
317 | } |
318 | ||
23a177ef LP |
319 | void unit_add_to_cleanup_queue(Unit *u) { |
320 | assert(u); | |
321 | ||
ac155bb8 | 322 | if (u->in_cleanup_queue) |
23a177ef LP |
323 | return; |
324 | ||
71fda00f | 325 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 326 | u->in_cleanup_queue = true; |
23a177ef LP |
327 | } |
328 | ||
701cc384 LP |
329 | void unit_add_to_gc_queue(Unit *u) { |
330 | assert(u); | |
331 | ||
ac155bb8 | 332 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
333 | return; |
334 | ||
335 | if (unit_check_gc(u)) | |
336 | return; | |
337 | ||
71fda00f | 338 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 339 | u->in_gc_queue = true; |
701cc384 | 340 | |
ac155bb8 | 341 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
342 | } |
343 | ||
c1e1601e LP |
344 | void unit_add_to_dbus_queue(Unit *u) { |
345 | assert(u); | |
ac155bb8 | 346 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 347 | |
ac155bb8 | 348 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
349 | return; |
350 | ||
a567261a | 351 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
352 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
353 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 354 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
355 | return; |
356 | } | |
357 | ||
71fda00f | 358 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 359 | u->in_dbus_queue = true; |
c1e1601e LP |
360 | } |
361 | ||
87f0e418 LP |
362 | static void bidi_set_free(Unit *u, Set *s) { |
363 | Iterator i; | |
364 | Unit *other; | |
365 | ||
366 | assert(u); | |
367 | ||
368 | /* Frees the set and makes sure we are dropped from the | |
369 | * inverse pointers */ | |
370 | ||
371 | SET_FOREACH(other, s, i) { | |
372 | UnitDependency d; | |
373 | ||
374 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 375 | set_remove(other->dependencies[d], u); |
701cc384 LP |
376 | |
377 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
378 | } |
379 | ||
380 | set_free(s); | |
381 | } | |
382 | ||
c2756a68 LP |
383 | static void unit_remove_transient(Unit *u) { |
384 | char **i; | |
385 | ||
386 | assert(u); | |
387 | ||
388 | if (!u->transient) | |
389 | return; | |
390 | ||
391 | if (u->fragment_path) | |
392 | unlink(u->fragment_path); | |
393 | ||
394 | STRV_FOREACH(i, u->dropin_paths) { | |
395 | _cleanup_free_ char *p = NULL; | |
396 | int r; | |
397 | ||
398 | unlink(*i); | |
399 | ||
400 | r = path_get_parent(*i, &p); | |
401 | if (r >= 0) | |
402 | rmdir(p); | |
403 | } | |
404 | } | |
405 | ||
a57f7e2c LP |
406 | static void unit_free_requires_mounts_for(Unit *u) { |
407 | char **j; | |
408 | ||
409 | STRV_FOREACH(j, u->requires_mounts_for) { | |
410 | char s[strlen(*j) + 1]; | |
411 | ||
412 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
413 | char *y; | |
414 | Set *x; | |
415 | ||
416 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
417 | if (!x) | |
418 | continue; | |
419 | ||
420 | set_remove(x, u); | |
421 | ||
422 | if (set_isempty(x)) { | |
423 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
424 | free(y); | |
425 | set_free(x); | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
430 | strv_free(u->requires_mounts_for); | |
431 | u->requires_mounts_for = NULL; | |
432 | } | |
433 | ||
598459ce LP |
434 | static void unit_done(Unit *u) { |
435 | ExecContext *ec; | |
436 | CGroupContext *cc; | |
437 | ||
438 | assert(u); | |
439 | ||
440 | if (u->type < 0) | |
441 | return; | |
442 | ||
443 | if (UNIT_VTABLE(u)->done) | |
444 | UNIT_VTABLE(u)->done(u); | |
445 | ||
446 | ec = unit_get_exec_context(u); | |
447 | if (ec) | |
448 | exec_context_done(ec); | |
449 | ||
450 | cc = unit_get_cgroup_context(u); | |
451 | if (cc) | |
452 | cgroup_context_done(cc); | |
453 | } | |
454 | ||
87f0e418 LP |
455 | void unit_free(Unit *u) { |
456 | UnitDependency d; | |
457 | Iterator i; | |
458 | char *t; | |
459 | ||
460 | assert(u); | |
461 | ||
c2756a68 LP |
462 | if (u->manager->n_reloading <= 0) |
463 | unit_remove_transient(u); | |
464 | ||
c1e1601e LP |
465 | bus_unit_send_removed_signal(u); |
466 | ||
598459ce | 467 | unit_done(u); |
a013b84b | 468 | |
a57f7e2c LP |
469 | unit_free_requires_mounts_for(u); |
470 | ||
ac155bb8 MS |
471 | SET_FOREACH(t, u->names, i) |
472 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 473 | |
97e7d748 MS |
474 | if (u->job) { |
475 | Job *j = u->job; | |
476 | job_uninstall(j); | |
477 | job_free(j); | |
478 | } | |
964e0949 | 479 | |
e0209d83 MS |
480 | if (u->nop_job) { |
481 | Job *j = u->nop_job; | |
482 | job_uninstall(j); | |
483 | job_free(j); | |
484 | } | |
485 | ||
964e0949 | 486 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 487 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 488 | |
ac155bb8 | 489 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 490 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 491 | |
ac155bb8 | 492 | if (u->in_load_queue) |
71fda00f | 493 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 494 | |
ac155bb8 | 495 | if (u->in_dbus_queue) |
71fda00f | 496 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 497 | |
ac155bb8 | 498 | if (u->in_cleanup_queue) |
71fda00f | 499 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 500 | |
ac155bb8 | 501 | if (u->in_gc_queue) { |
71fda00f | 502 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 503 | u->manager->n_in_gc_queue--; |
701cc384 LP |
504 | } |
505 | ||
4ad49000 | 506 | if (u->in_cgroup_queue) |
71fda00f | 507 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 508 | |
72673e86 LP |
509 | if (u->cgroup_path) { |
510 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
511 | free(u->cgroup_path); | |
512 | } | |
513 | ||
f755e3b7 | 514 | set_remove(u->manager->failed_units, u); |
db785129 | 515 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 516 | |
ac155bb8 | 517 | free(u->description); |
49dbfa7b | 518 | strv_free(u->documentation); |
ac155bb8 | 519 | free(u->fragment_path); |
1b64d026 | 520 | free(u->source_path); |
ae7a7182 | 521 | strv_free(u->dropin_paths); |
ac155bb8 | 522 | free(u->instance); |
87f0e418 | 523 | |
f189ab18 LP |
524 | free(u->job_timeout_reboot_arg); |
525 | ||
ac155bb8 | 526 | set_free_free(u->names); |
87f0e418 | 527 | |
a911bb9a LP |
528 | unit_unwatch_all_pids(u); |
529 | ||
ac155bb8 | 530 | condition_free_list(u->conditions); |
59fccdc5 | 531 | condition_free_list(u->asserts); |
52661efd | 532 | |
702a2d8f LP |
533 | unit_ref_unset(&u->slice); |
534 | ||
ac155bb8 MS |
535 | while (u->refs) |
536 | unit_ref_unset(u->refs); | |
57020a3a | 537 | |
87f0e418 LP |
538 | free(u); |
539 | } | |
540 | ||
541 | UnitActiveState unit_active_state(Unit *u) { | |
542 | assert(u); | |
543 | ||
ac155bb8 | 544 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
545 | return unit_active_state(unit_follow_merge(u)); |
546 | ||
547 | /* After a reload it might happen that a unit is not correctly | |
548 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 549 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
550 | |
551 | return UNIT_VTABLE(u)->active_state(u); | |
552 | } | |
553 | ||
10a94420 LP |
554 | const char* unit_sub_state_to_string(Unit *u) { |
555 | assert(u); | |
556 | ||
557 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
558 | } | |
559 | ||
7c0b05e5 MS |
560 | static int complete_move(Set **s, Set **other) { |
561 | int r; | |
562 | ||
23a177ef LP |
563 | assert(s); |
564 | assert(other); | |
87f0e418 | 565 | |
23a177ef | 566 | if (!*other) |
7c0b05e5 | 567 | return 0; |
87f0e418 | 568 | |
7c0b05e5 MS |
569 | if (*s) { |
570 | r = set_move(*s, *other); | |
571 | if (r < 0) | |
572 | return r; | |
573 | } else { | |
23a177ef LP |
574 | *s = *other; |
575 | *other = NULL; | |
576 | } | |
7c0b05e5 MS |
577 | |
578 | return 0; | |
23a177ef | 579 | } |
87f0e418 | 580 | |
7c0b05e5 | 581 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
582 | char *t; |
583 | Iterator i; | |
7c0b05e5 | 584 | int r; |
87f0e418 | 585 | |
23a177ef LP |
586 | assert(u); |
587 | assert(other); | |
588 | ||
7c0b05e5 MS |
589 | r = complete_move(&u->names, &other->names); |
590 | if (r < 0) | |
591 | return r; | |
23a177ef | 592 | |
ac155bb8 MS |
593 | set_free_free(other->names); |
594 | other->names = NULL; | |
595 | other->id = NULL; | |
23a177ef | 596 | |
ac155bb8 MS |
597 | SET_FOREACH(t, u->names, i) |
598 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
599 | |
600 | return 0; | |
87f0e418 LP |
601 | } |
602 | ||
09a65f92 MS |
603 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
604 | unsigned n_reserve; | |
605 | ||
606 | assert(u); | |
607 | assert(other); | |
608 | assert(d < _UNIT_DEPENDENCY_MAX); | |
609 | ||
610 | /* | |
611 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 612 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
613 | * as a whole to u by complete_move(). |
614 | */ | |
615 | if (!u->dependencies[d]) | |
616 | return 0; | |
617 | ||
618 | /* merge_dependencies() will skip a u-on-u dependency */ | |
619 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
620 | ||
621 | return set_reserve(u->dependencies[d], n_reserve); | |
622 | } | |
623 | ||
d1fab3fe | 624 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
625 | Iterator i; |
626 | Unit *back; | |
87f0e418 | 627 | int r; |
23a177ef LP |
628 | |
629 | assert(u); | |
630 | assert(other); | |
631 | assert(d < _UNIT_DEPENDENCY_MAX); | |
632 | ||
83a95334 | 633 | /* Fix backwards pointers */ |
ac155bb8 | 634 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
635 | UnitDependency k; |
636 | ||
e48614c4 | 637 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
638 | /* Do not add dependencies between u and itself */ |
639 | if (back == u) { | |
d1fab3fe ZJS |
640 | if (set_remove(back->dependencies[k], other)) |
641 | maybe_warn_about_dependency(u->id, other_id, k); | |
e66047ff ZJS |
642 | } else { |
643 | r = set_remove_and_put(back->dependencies[k], other, u); | |
644 | if (r == -EEXIST) | |
645 | set_remove(back->dependencies[k], other); | |
646 | else | |
647 | assert(r >= 0 || r == -ENOENT); | |
648 | } | |
e48614c4 | 649 | } |
23a177ef LP |
650 | } |
651 | ||
e66047ff | 652 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
653 | back = set_remove(other->dependencies[d], u); |
654 | if (back) | |
655 | maybe_warn_about_dependency(u->id, other_id, d); | |
e66047ff | 656 | |
7c0b05e5 MS |
657 | /* The move cannot fail. The caller must have performed a reservation. */ |
658 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 659 | |
ac155bb8 MS |
660 | set_free(other->dependencies[d]); |
661 | other->dependencies[d] = NULL; | |
23a177ef LP |
662 | } |
663 | ||
664 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 665 | UnitDependency d; |
d1fab3fe | 666 | const char *other_id = NULL; |
09a65f92 | 667 | int r; |
87f0e418 LP |
668 | |
669 | assert(u); | |
670 | assert(other); | |
ac155bb8 MS |
671 | assert(u->manager == other->manager); |
672 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 673 | |
cc916967 LP |
674 | other = unit_follow_merge(other); |
675 | ||
23a177ef LP |
676 | if (other == u) |
677 | return 0; | |
678 | ||
ac155bb8 | 679 | if (u->type != other->type) |
9e2f7c11 LP |
680 | return -EINVAL; |
681 | ||
ac155bb8 | 682 | if (!u->instance != !other->instance) |
87f0e418 LP |
683 | return -EINVAL; |
684 | ||
ac155bb8 | 685 | if (other->load_state != UNIT_STUB && |
c2756a68 | 686 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 687 | return -EEXIST; |
87f0e418 | 688 | |
ac155bb8 | 689 | if (other->job) |
819e213f LP |
690 | return -EEXIST; |
691 | ||
e0209d83 MS |
692 | if (other->nop_job) |
693 | return -EEXIST; | |
694 | ||
fdf20a31 | 695 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
696 | return -EEXIST; |
697 | ||
d1fab3fe ZJS |
698 | if (other->id) |
699 | other_id = strdupa(other->id); | |
700 | ||
09a65f92 MS |
701 | /* Make reservations to ensure merge_dependencies() won't fail */ |
702 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
703 | r = reserve_dependencies(u, other, d); | |
704 | /* | |
705 | * We don't rollback reservations if we fail. We don't have | |
706 | * a way to undo reservations. A reservation is not a leak. | |
707 | */ | |
708 | if (r < 0) | |
709 | return r; | |
710 | } | |
711 | ||
87f0e418 | 712 | /* Merge names */ |
7c0b05e5 MS |
713 | r = merge_names(u, other); |
714 | if (r < 0) | |
715 | return r; | |
87f0e418 | 716 | |
57020a3a | 717 | /* Redirect all references */ |
ac155bb8 MS |
718 | while (other->refs) |
719 | unit_ref_set(other->refs, u); | |
57020a3a | 720 | |
87f0e418 LP |
721 | /* Merge dependencies */ |
722 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 723 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 724 | |
ac155bb8 MS |
725 | other->load_state = UNIT_MERGED; |
726 | other->merged_into = u; | |
23a177ef | 727 | |
3616a49c LP |
728 | /* If there is still some data attached to the other node, we |
729 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 730 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
731 | if (UNIT_VTABLE(other)->done) |
732 | UNIT_VTABLE(other)->done(other); | |
733 | ||
734 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
735 | unit_add_to_cleanup_queue(other); |
736 | ||
737 | return 0; | |
738 | } | |
739 | ||
740 | int unit_merge_by_name(Unit *u, const char *name) { | |
741 | Unit *other; | |
9e2f7c11 | 742 | int r; |
68eda4bd | 743 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
744 | |
745 | assert(u); | |
746 | assert(name); | |
747 | ||
9e2f7c11 | 748 | if (unit_name_is_template(name)) { |
ac155bb8 | 749 | if (!u->instance) |
9e2f7c11 LP |
750 | return -EINVAL; |
751 | ||
e48614c4 ZJS |
752 | s = unit_name_replace_instance(name, u->instance); |
753 | if (!s) | |
9e2f7c11 LP |
754 | return -ENOMEM; |
755 | ||
756 | name = s; | |
757 | } | |
758 | ||
c2756a68 LP |
759 | other = manager_get_unit(u->manager, name); |
760 | if (!other) | |
9e2f7c11 LP |
761 | r = unit_add_name(u, name); |
762 | else | |
763 | r = unit_merge(u, other); | |
23a177ef | 764 | |
9e2f7c11 | 765 | return r; |
23a177ef LP |
766 | } |
767 | ||
768 | Unit* unit_follow_merge(Unit *u) { | |
769 | assert(u); | |
770 | ||
ac155bb8 MS |
771 | while (u->load_state == UNIT_MERGED) |
772 | assert_se(u = u->merged_into); | |
23a177ef LP |
773 | |
774 | return u; | |
775 | } | |
776 | ||
777 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
778 | int r; | |
779 | ||
780 | assert(u); | |
781 | assert(c); | |
782 | ||
36be24c8 ZJS |
783 | if (c->working_directory) { |
784 | r = unit_require_mounts_for(u, c->working_directory); | |
785 | if (r < 0) | |
786 | return r; | |
787 | } | |
788 | ||
789 | if (c->root_directory) { | |
790 | r = unit_require_mounts_for(u, c->root_directory); | |
791 | if (r < 0) | |
792 | return r; | |
793 | } | |
794 | ||
b46a529c LP |
795 | if (u->manager->running_as != SYSTEMD_SYSTEM) |
796 | return 0; | |
797 | ||
798 | if (c->private_tmp) { | |
799 | r = unit_require_mounts_for(u, "/tmp"); | |
800 | if (r < 0) | |
801 | return r; | |
802 | ||
803 | r = unit_require_mounts_for(u, "/var/tmp"); | |
804 | if (r < 0) | |
805 | return r; | |
806 | } | |
807 | ||
ecc6e2b8 LP |
808 | if (c->std_output != EXEC_OUTPUT_KMSG && |
809 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 810 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
811 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
812 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 813 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 814 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 815 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 816 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 817 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 818 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 819 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
820 | return 0; |
821 | ||
822 | /* If syslog or kernel logging is requested, make sure our own | |
823 | * logging daemon is run first. */ | |
824 | ||
b46a529c LP |
825 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
826 | if (r < 0) | |
827 | return r; | |
23a177ef | 828 | |
87f0e418 LP |
829 | return 0; |
830 | } | |
831 | ||
87f0e418 LP |
832 | const char *unit_description(Unit *u) { |
833 | assert(u); | |
834 | ||
ac155bb8 MS |
835 | if (u->description) |
836 | return u->description; | |
87f0e418 | 837 | |
ac155bb8 | 838 | return strna(u->id); |
87f0e418 LP |
839 | } |
840 | ||
841 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 842 | char *t, **j; |
87f0e418 LP |
843 | UnitDependency d; |
844 | Iterator i; | |
47be870b | 845 | const char *prefix2; |
173e3821 LP |
846 | char |
847 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
848 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
849 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
850 | timestamp4[FORMAT_TIMESTAMP_MAX], |
851 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 852 | Unit *following; |
eeaedb7c LP |
853 | _cleanup_set_free_ Set *following_set = NULL; |
854 | int r; | |
87f0e418 LP |
855 | |
856 | assert(u); | |
ac155bb8 | 857 | assert(u->type >= 0); |
87f0e418 | 858 | |
4c940960 LP |
859 | prefix = strempty(prefix); |
860 | prefix2 = strappenda(prefix, "\t"); | |
87f0e418 LP |
861 | |
862 | fprintf(f, | |
40d50879 | 863 | "%s-> Unit %s:\n" |
87f0e418 | 864 | "%s\tDescription: %s\n" |
9e2f7c11 | 865 | "%s\tInstance: %s\n" |
87f0e418 | 866 | "%s\tUnit Load State: %s\n" |
2fad8195 | 867 | "%s\tUnit Active State: %s\n" |
173e3821 | 868 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 869 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 870 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 871 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 872 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 873 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 874 | "%s\tTransient: %s\n" |
4ad49000 LP |
875 | "%s\tSlice: %s\n" |
876 | "%s\tCGroup: %s\n" | |
877 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
878 | "%s\tCGroup mask: 0x%x\n" |
879 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 880 | prefix, u->id, |
87f0e418 | 881 | prefix, unit_description(u), |
ac155bb8 MS |
882 | prefix, strna(u->instance), |
883 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 884 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
885 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
886 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
887 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
888 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 889 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 890 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 891 | prefix, yes_no(u->transient), |
4ad49000 LP |
892 | prefix, strna(unit_slice_name(u)), |
893 | prefix, strna(u->cgroup_path), | |
894 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 895 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 896 | prefix, u->cgroup_members_mask); |
0301abf4 | 897 | |
ac155bb8 | 898 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
899 | fprintf(f, "%s\tName: %s\n", prefix, t); |
900 | ||
49dbfa7b LP |
901 | STRV_FOREACH(j, u->documentation) |
902 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
903 | ||
eeaedb7c LP |
904 | following = unit_following(u); |
905 | if (following) | |
ac155bb8 | 906 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 907 | |
eeaedb7c LP |
908 | r = unit_following_set(u, &following_set); |
909 | if (r >= 0) { | |
910 | Unit *other; | |
911 | ||
912 | SET_FOREACH(other, following_set, i) | |
913 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
914 | } | |
915 | ||
ac155bb8 MS |
916 | if (u->fragment_path) |
917 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 918 | |
1b64d026 LP |
919 | if (u->source_path) |
920 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
921 | ||
ae7a7182 | 922 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 923 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 924 | |
ac155bb8 | 925 | if (u->job_timeout > 0) |
2fa4092c | 926 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 927 | |
f189ab18 LP |
928 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
929 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
930 | ||
931 | if (u->job_timeout_reboot_arg) | |
932 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
933 | ||
59fccdc5 LP |
934 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
935 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 936 | |
ac155bb8 | 937 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
938 | fprintf(f, |
939 | "%s\tCondition Timestamp: %s\n" | |
940 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
941 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
942 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 943 | |
59fccdc5 LP |
944 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
945 | fprintf(f, | |
946 | "%s\tAssert Timestamp: %s\n" | |
947 | "%s\tAssert Result: %s\n", | |
948 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
949 | prefix, yes_no(u->assert_result)); | |
950 | ||
87f0e418 LP |
951 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
952 | Unit *other; | |
953 | ||
ac155bb8 MS |
954 | SET_FOREACH(other, u->dependencies[d], i) |
955 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
956 | } |
957 | ||
7c8fa05c | 958 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
959 | fprintf(f, |
960 | "%s\tRequiresMountsFor:", prefix); | |
961 | ||
962 | STRV_FOREACH(j, u->requires_mounts_for) | |
963 | fprintf(f, " %s", *j); | |
964 | ||
965 | fputs("\n", f); | |
966 | } | |
967 | ||
ac155bb8 | 968 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 969 | |
b0650475 | 970 | fprintf(f, |
a40eb732 | 971 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
972 | "%s\tRefuseManualStart: %s\n" |
973 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 974 | "%s\tDefaultDependencies: %s\n" |
d420282b | 975 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
976 | "%s\tIgnoreOnIsolate: %s\n" |
977 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
978 | prefix, yes_no(u->stop_when_unneeded), |
979 | prefix, yes_no(u->refuse_manual_start), | |
980 | prefix, yes_no(u->refuse_manual_stop), | |
981 | prefix, yes_no(u->default_dependencies), | |
d420282b | 982 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
983 | prefix, yes_no(u->ignore_on_isolate), |
984 | prefix, yes_no(u->ignore_on_snapshot)); | |
985 | ||
23a177ef LP |
986 | if (UNIT_VTABLE(u)->dump) |
987 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 988 | |
ac155bb8 | 989 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
990 | fprintf(f, |
991 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
992 | prefix, u->merged_into->id); |
993 | else if (u->load_state == UNIT_ERROR) | |
994 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 995 | |
87f0e418 | 996 | |
ac155bb8 MS |
997 | if (u->job) |
998 | job_dump(u->job, f, prefix2); | |
87f0e418 | 999 | |
e0209d83 MS |
1000 | if (u->nop_job) |
1001 | job_dump(u->nop_job, f, prefix2); | |
1002 | ||
87f0e418 LP |
1003 | } |
1004 | ||
1005 | /* Common implementation for multiple backends */ | |
e537352b | 1006 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1007 | int r; |
1008 | ||
1009 | assert(u); | |
23a177ef | 1010 | |
e48614c4 | 1011 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1012 | r = unit_load_fragment(u); |
1013 | if (r < 0) | |
23a177ef LP |
1014 | return r; |
1015 | ||
ac155bb8 | 1016 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1017 | return -ENOENT; |
1018 | ||
1019 | /* Load drop-in directory data */ | |
4ad49000 LP |
1020 | r = unit_load_dropin(unit_follow_merge(u)); |
1021 | if (r < 0) | |
23a177ef LP |
1022 | return r; |
1023 | ||
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | /* Common implementation for multiple backends */ | |
e537352b | 1028 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1029 | int r; |
87f0e418 LP |
1030 | |
1031 | assert(u); | |
1032 | ||
23a177ef LP |
1033 | /* Same as unit_load_fragment_and_dropin(), but whether |
1034 | * something can be loaded or not doesn't matter. */ | |
1035 | ||
1036 | /* Load a .service file */ | |
4ad49000 LP |
1037 | r = unit_load_fragment(u); |
1038 | if (r < 0) | |
87f0e418 LP |
1039 | return r; |
1040 | ||
ac155bb8 MS |
1041 | if (u->load_state == UNIT_STUB) |
1042 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1043 | |
87f0e418 | 1044 | /* Load drop-in directory data */ |
4ad49000 LP |
1045 | r = unit_load_dropin(unit_follow_merge(u)); |
1046 | if (r < 0) | |
87f0e418 LP |
1047 | return r; |
1048 | ||
23a177ef | 1049 | return 0; |
87f0e418 LP |
1050 | } |
1051 | ||
bba34eed | 1052 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1053 | assert(u); |
1054 | assert(target); | |
1055 | ||
ac155bb8 | 1056 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1057 | return 0; |
1058 | ||
35b8ca3a | 1059 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1060 | * that loop check below is reliable */ |
ac155bb8 MS |
1061 | if (u->load_state != UNIT_LOADED || |
1062 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1063 | return 0; |
1064 | ||
21256a2b LP |
1065 | /* If either side wants no automatic dependencies, then let's |
1066 | * skip this */ | |
ac155bb8 MS |
1067 | if (!u->default_dependencies || |
1068 | !target->default_dependencies) | |
21256a2b LP |
1069 | return 0; |
1070 | ||
98bc2000 | 1071 | /* Don't create loops */ |
ac155bb8 | 1072 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1073 | return 0; |
1074 | ||
1075 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1076 | } | |
1077 | ||
e954c9cf | 1078 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1079 | |
21256a2b LP |
1080 | static const UnitDependency deps[] = { |
1081 | UNIT_REQUIRED_BY, | |
1082 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
1083 | UNIT_WANTED_BY, | |
1084 | UNIT_BOUND_BY | |
1085 | }; | |
1086 | ||
bba34eed | 1087 | Unit *target; |
98bc2000 | 1088 | Iterator i; |
21256a2b | 1089 | unsigned k; |
db57f3c6 | 1090 | int r = 0; |
98bc2000 LP |
1091 | |
1092 | assert(u); | |
1093 | ||
21256a2b | 1094 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1095 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1096 | r = unit_add_default_target_dependency(u, target); | |
1097 | if (r < 0) | |
21256a2b | 1098 | return r; |
a016b922 LP |
1099 | } |
1100 | ||
e954c9cf LP |
1101 | return r; |
1102 | } | |
4ad49000 | 1103 | |
e954c9cf LP |
1104 | static int unit_add_slice_dependencies(Unit *u) { |
1105 | assert(u); | |
b81884e7 | 1106 | |
e954c9cf LP |
1107 | if (!unit_get_cgroup_context(u)) |
1108 | return 0; | |
1109 | ||
1110 | if (UNIT_ISSET(u->slice)) | |
1111 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
1112 | ||
d1fab3fe ZJS |
1113 | if (streq(u->id, SPECIAL_ROOT_SLICE)) |
1114 | return 0; | |
1115 | ||
e954c9cf | 1116 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1117 | } |
1118 | ||
e954c9cf | 1119 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1120 | char **i; |
1121 | int r; | |
1122 | ||
1123 | assert(u); | |
1124 | ||
1125 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1126 | char prefix[strlen(*i) + 1]; | |
1127 | ||
1128 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
1129 | Unit *m; | |
1130 | ||
1131 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
1132 | if (r < 0) | |
1133 | return r; | |
1134 | if (r == 0) | |
1135 | continue; | |
1136 | if (m == u) | |
1137 | continue; | |
1138 | ||
1139 | if (m->load_state != UNIT_LOADED) | |
1140 | continue; | |
1141 | ||
1142 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1143 | if (r < 0) | |
1144 | return r; | |
1145 | ||
1146 | if (m->fragment_path) { | |
1147 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1148 | if (r < 0) | |
1149 | return r; | |
1150 | } | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | return 0; | |
1155 | } | |
1156 | ||
95ae05c0 WC |
1157 | static int unit_add_startup_units(Unit *u) { |
1158 | CGroupContext *c; | |
1159 | int r = 0; | |
1160 | ||
1161 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1162 | if (!c) |
1163 | return 0; | |
1164 | ||
1165 | if (c->startup_cpu_shares == (unsigned long) -1 && | |
1166 | c->startup_blockio_weight == (unsigned long) -1) | |
1167 | return 0; | |
1168 | ||
1169 | r = set_put(u->manager->startup_units, u); | |
1170 | if (r == -EEXIST) | |
1171 | return 0; | |
1172 | ||
95ae05c0 WC |
1173 | return r; |
1174 | } | |
1175 | ||
87f0e418 LP |
1176 | int unit_load(Unit *u) { |
1177 | int r; | |
1178 | ||
1179 | assert(u); | |
1180 | ||
ac155bb8 | 1181 | if (u->in_load_queue) { |
71fda00f | 1182 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1183 | u->in_load_queue = false; |
87f0e418 LP |
1184 | } |
1185 | ||
ac155bb8 | 1186 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1187 | return -EINVAL; |
1188 | ||
ac155bb8 | 1189 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1190 | return 0; |
1191 | ||
c2756a68 LP |
1192 | if (UNIT_VTABLE(u)->load) { |
1193 | r = UNIT_VTABLE(u)->load(u); | |
1194 | if (r < 0) | |
87f0e418 | 1195 | goto fail; |
c2756a68 | 1196 | } |
23a177ef | 1197 | |
ac155bb8 | 1198 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1199 | r = -ENOENT; |
1200 | goto fail; | |
1201 | } | |
1202 | ||
7c8fa05c | 1203 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1204 | |
e954c9cf LP |
1205 | r = unit_add_target_dependencies(u); |
1206 | if (r < 0) | |
1207 | goto fail; | |
1208 | ||
1209 | r = unit_add_slice_dependencies(u); | |
1210 | if (r < 0) | |
1211 | goto fail; | |
c2756a68 | 1212 | |
e954c9cf | 1213 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1214 | if (r < 0) |
c2756a68 | 1215 | goto fail; |
7c8fa05c | 1216 | |
95ae05c0 WC |
1217 | r = unit_add_startup_units(u); |
1218 | if (r < 0) | |
1219 | goto fail; | |
1220 | ||
bc432dc7 | 1221 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
79008bdd | 1222 | log_unit_error(u->id, "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id); |
c2756a68 LP |
1223 | r = -EINVAL; |
1224 | goto fail; | |
1225 | } | |
bc432dc7 LP |
1226 | |
1227 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1228 | } |
1229 | ||
ac155bb8 | 1230 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1231 | |
1232 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1233 | unit_add_to_gc_queue(u); |
87f0e418 | 1234 | |
87f0e418 LP |
1235 | return 0; |
1236 | ||
1237 | fail: | |
c2756a68 | 1238 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1239 | u->load_error = r; |
c1e1601e | 1240 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1241 | unit_add_to_gc_queue(u); |
23a177ef | 1242 | |
79008bdd | 1243 | log_unit_debug(u->id, "Failed to load configuration for %s: %s", |
c1b6628d | 1244 | u->id, strerror(-r)); |
23a177ef | 1245 | |
87f0e418 LP |
1246 | return r; |
1247 | } | |
1248 | ||
49365733 LP |
1249 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1250 | Condition *c; | |
1251 | int triggered = -1; | |
1252 | ||
1253 | assert(u); | |
1254 | assert(to_string); | |
1255 | ||
1256 | /* If the condition list is empty, then it is true */ | |
1257 | if (!first) | |
1258 | return true; | |
1259 | ||
1260 | /* Otherwise, if all of the non-trigger conditions apply and | |
1261 | * if any of the trigger conditions apply (unless there are | |
1262 | * none) we return true */ | |
1263 | LIST_FOREACH(conditions, c, first) { | |
1264 | int r; | |
1265 | ||
1266 | r = condition_test(c); | |
1267 | if (r < 0) | |
79008bdd | 1268 | log_unit_warning(u->id, |
49365733 LP |
1269 | "Couldn't determine result for %s=%s%s%s for %s, assuming failed: %s", |
1270 | to_string(c->type), | |
1271 | c->trigger ? "|" : "", | |
1272 | c->negate ? "!" : "", | |
1273 | c->parameter, | |
1274 | u->id, | |
1275 | strerror(-r)); | |
1276 | else | |
79008bdd | 1277 | log_unit_debug(u->id, |
49365733 LP |
1278 | "%s=%s%s%s %s for %s.", |
1279 | to_string(c->type), | |
1280 | c->trigger ? "|" : "", | |
1281 | c->negate ? "!" : "", | |
1282 | c->parameter, | |
1283 | condition_result_to_string(c->result), | |
1284 | u->id); | |
1285 | ||
1286 | if (!c->trigger && r <= 0) | |
1287 | return false; | |
1288 | ||
1289 | if (c->trigger && triggered <= 0) | |
1290 | triggered = r > 0; | |
1291 | } | |
1292 | ||
1293 | return triggered != 0; | |
1294 | } | |
1295 | ||
9588bc32 | 1296 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1297 | assert(u); |
1298 | ||
ac155bb8 | 1299 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1300 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1301 | |
ac155bb8 | 1302 | return u->condition_result; |
90bbc946 LP |
1303 | } |
1304 | ||
59fccdc5 LP |
1305 | static bool unit_assert_test(Unit *u) { |
1306 | assert(u); | |
1307 | ||
1308 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1309 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1310 | |
1311 | return u->assert_result; | |
1312 | } | |
1313 | ||
44a6b1b6 | 1314 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 1315 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1316 | |
1317 | assert(u); | |
1318 | assert(t >= 0); | |
1319 | assert(t < _JOB_TYPE_MAX); | |
1320 | ||
1321 | if (t != JOB_START && t != JOB_STOP) | |
1322 | return NULL; | |
c6918296 MS |
1323 | |
1324 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1325 | if (!format_table) | |
877d54e9 LP |
1326 | return NULL; |
1327 | ||
1328 | return format_table->starting_stopping[t == JOB_STOP]; | |
1329 | } | |
1330 | ||
44a6b1b6 | 1331 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { |
877d54e9 LP |
1332 | const char *format; |
1333 | ||
1334 | assert(u); | |
1335 | assert(t >= 0); | |
1336 | assert(t < _JOB_TYPE_MAX); | |
1337 | ||
1338 | format = unit_get_status_message_format(u, t); | |
1339 | if (format) | |
1340 | return format; | |
1341 | ||
1342 | /* Return generic strings */ | |
1343 | if (t == JOB_START) | |
1344 | return "Starting %s."; | |
1345 | else if (t == JOB_STOP) | |
1346 | return "Stopping %s."; | |
1347 | else if (t == JOB_RELOAD) | |
1348 | return "Reloading %s."; | |
1349 | ||
1350 | return NULL; | |
1351 | } | |
1352 | ||
1353 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1354 | const char *format; | |
1355 | ||
1356 | assert(u); | |
1357 | ||
1358 | /* We only print status messages for selected units on | |
1359 | * selected operations. */ | |
c6918296 | 1360 | |
877d54e9 | 1361 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
1362 | if (!format) |
1363 | return; | |
1364 | ||
bcfce235 | 1365 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1366 | unit_status_printf(u, "", format); |
bcfce235 | 1367 | REENABLE_WARNING; |
c6918296 MS |
1368 | } |
1369 | ||
877d54e9 LP |
1370 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1371 | const char *format; | |
1372 | char buf[LINE_MAX]; | |
1373 | sd_id128_t mid; | |
1374 | ||
1375 | assert(u); | |
1376 | ||
1377 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1378 | return; | |
1379 | ||
81270860 LP |
1380 | if (log_on_console()) |
1381 | return; | |
1382 | ||
877d54e9 LP |
1383 | /* We log status messages for all units and all operations. */ |
1384 | ||
1385 | format = unit_get_status_message_format_try_harder(u, t); | |
1386 | if (!format) | |
1387 | return; | |
1388 | ||
bcfce235 | 1389 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 LP |
1390 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
1391 | char_array_0(buf); | |
bcfce235 | 1392 | REENABLE_WARNING; |
877d54e9 LP |
1393 | |
1394 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1395 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1396 | SD_MESSAGE_UNIT_RELOADING; | |
1397 | ||
e2cc6eca LP |
1398 | log_unit_struct(u->id, |
1399 | LOG_INFO, | |
1400 | LOG_MESSAGE_ID(mid), | |
1401 | LOG_MESSAGE("%s", buf), | |
c1b6628d | 1402 | NULL); |
877d54e9 | 1403 | } |
877d54e9 | 1404 | |
87f0e418 | 1405 | /* Errors: |
d5159713 LP |
1406 | * -EBADR: This unit type does not support starting. |
1407 | * -EALREADY: Unit is already started. | |
1408 | * -EAGAIN: An operation is already in progress. Retry later. | |
1409 | * -ECANCELED: Too many requests for now. | |
59fccdc5 | 1410 | * -EPROTO: Assert failed |
87f0e418 LP |
1411 | */ |
1412 | int unit_start(Unit *u) { | |
1413 | UnitActiveState state; | |
92ab323c | 1414 | Unit *following; |
87f0e418 LP |
1415 | |
1416 | assert(u); | |
1417 | ||
ac155bb8 | 1418 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1419 | return -EINVAL; |
1420 | ||
a82e5507 LP |
1421 | /* If this is already started, then this will succeed. Note |
1422 | * that this will even succeed if this unit is not startable | |
1423 | * by the user. This is relied on to detect when we need to | |
1424 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1425 | state = unit_active_state(u); |
1426 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1427 | return -EALREADY; | |
1428 | ||
a82e5507 LP |
1429 | /* If the conditions failed, don't do anything at all. If we |
1430 | * already are activating this call might still be useful to | |
1431 | * speed up activation in case there is some hold-off time, | |
1432 | * but we don't want to recheck the condition in that case. */ | |
1433 | if (state != UNIT_ACTIVATING && | |
1434 | !unit_condition_test(u)) { | |
79008bdd | 1435 | log_unit_debug(u->id, "Starting of %s requested but condition failed. Not starting unit.", u->id); |
52661efd LP |
1436 | return -EALREADY; |
1437 | } | |
1438 | ||
59fccdc5 LP |
1439 | /* If the asserts failed, fail the entire job */ |
1440 | if (state != UNIT_ACTIVATING && | |
1441 | !unit_assert_test(u)) { | |
79008bdd | 1442 | log_unit_debug(u->id, "Starting of %s requested but asserts failed.", u->id); |
59fccdc5 LP |
1443 | return -EPROTO; |
1444 | } | |
1445 | ||
92ab323c | 1446 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1447 | following = unit_following(u); |
1448 | if (following) { | |
79008bdd | 1449 | log_unit_debug(u->id, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1450 | return unit_start(following); |
1451 | } | |
1452 | ||
877d54e9 LP |
1453 | unit_status_log_starting_stopping_reloading(u, JOB_START); |
1454 | unit_status_print_starting_stopping(u, JOB_START); | |
c6918296 | 1455 | |
0faacd47 LP |
1456 | if (UNIT_VTABLE(u)->supported && !UNIT_VTABLE(u)->supported(u->manager)) |
1457 | return -ENOTSUP; | |
1458 | ||
92ab323c LP |
1459 | /* If it is stopped, but we cannot start it, then fail */ |
1460 | if (!UNIT_VTABLE(u)->start) | |
1461 | return -EBADR; | |
1462 | ||
87f0e418 LP |
1463 | /* We don't suppress calls to ->start() here when we are |
1464 | * already starting, to allow this request to be used as a | |
1465 | * "hurry up" call, for example when the unit is in some "auto | |
1466 | * restart" state where it waits for a holdoff timer to elapse | |
1467 | * before it will start again. */ | |
1468 | ||
c1e1601e | 1469 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1470 | |
87f0e418 LP |
1471 | return UNIT_VTABLE(u)->start(u); |
1472 | } | |
1473 | ||
1474 | bool unit_can_start(Unit *u) { | |
1475 | assert(u); | |
1476 | ||
1477 | return !!UNIT_VTABLE(u)->start; | |
1478 | } | |
1479 | ||
2528a7a6 LP |
1480 | bool unit_can_isolate(Unit *u) { |
1481 | assert(u); | |
1482 | ||
1483 | return unit_can_start(u) && | |
ac155bb8 | 1484 | u->allow_isolate; |
2528a7a6 LP |
1485 | } |
1486 | ||
87f0e418 LP |
1487 | /* Errors: |
1488 | * -EBADR: This unit type does not support stopping. | |
1489 | * -EALREADY: Unit is already stopped. | |
1490 | * -EAGAIN: An operation is already in progress. Retry later. | |
1491 | */ | |
1492 | int unit_stop(Unit *u) { | |
1493 | UnitActiveState state; | |
92ab323c | 1494 | Unit *following; |
87f0e418 LP |
1495 | |
1496 | assert(u); | |
1497 | ||
87f0e418 | 1498 | state = unit_active_state(u); |
fdf20a31 | 1499 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1500 | return -EALREADY; |
1501 | ||
0faacd47 LP |
1502 | following = unit_following(u); |
1503 | if (following) { | |
1504 | log_unit_debug(u->id, "Redirecting stop request from %s to %s.", u->id, following->id); | |
92ab323c LP |
1505 | return unit_stop(following); |
1506 | } | |
1507 | ||
877d54e9 LP |
1508 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); |
1509 | unit_status_print_starting_stopping(u, JOB_STOP); | |
c6918296 | 1510 | |
7898b0cf LP |
1511 | if (!UNIT_VTABLE(u)->stop) |
1512 | return -EBADR; | |
1513 | ||
c1e1601e | 1514 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1515 | |
87f0e418 LP |
1516 | return UNIT_VTABLE(u)->stop(u); |
1517 | } | |
1518 | ||
1519 | /* Errors: | |
1520 | * -EBADR: This unit type does not support reloading. | |
1521 | * -ENOEXEC: Unit is not started. | |
1522 | * -EAGAIN: An operation is already in progress. Retry later. | |
1523 | */ | |
1524 | int unit_reload(Unit *u) { | |
1525 | UnitActiveState state; | |
92ab323c | 1526 | Unit *following; |
87f0e418 LP |
1527 | |
1528 | assert(u); | |
1529 | ||
ac155bb8 | 1530 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1531 | return -EINVAL; |
1532 | ||
87f0e418 LP |
1533 | if (!unit_can_reload(u)) |
1534 | return -EBADR; | |
1535 | ||
1536 | state = unit_active_state(u); | |
e364ad06 | 1537 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1538 | return -EALREADY; |
1539 | ||
6a371e23 | 1540 | if (state != UNIT_ACTIVE) { |
0faacd47 | 1541 | log_unit_warning(u->id, "Unit %s cannot be reloaded because it is inactive.", u->id); |
87f0e418 | 1542 | return -ENOEXEC; |
6a371e23 | 1543 | } |
87f0e418 | 1544 | |
e48614c4 ZJS |
1545 | following = unit_following(u); |
1546 | if (following) { | |
0faacd47 | 1547 | log_unit_debug(u->id, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1548 | return unit_reload(following); |
1549 | } | |
1550 | ||
877d54e9 LP |
1551 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); |
1552 | ||
c1e1601e | 1553 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1554 | return UNIT_VTABLE(u)->reload(u); |
1555 | } | |
1556 | ||
1557 | bool unit_can_reload(Unit *u) { | |
1558 | assert(u); | |
1559 | ||
1560 | if (!UNIT_VTABLE(u)->reload) | |
1561 | return false; | |
1562 | ||
1563 | if (!UNIT_VTABLE(u)->can_reload) | |
1564 | return true; | |
1565 | ||
1566 | return UNIT_VTABLE(u)->can_reload(u); | |
1567 | } | |
1568 | ||
b4a16b7b | 1569 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1570 | Iterator i; |
1571 | Unit *other; | |
1572 | ||
1573 | assert(u); | |
1574 | ||
1575 | /* If this service shall be shut down when unneeded then do | |
1576 | * so. */ | |
1577 | ||
ac155bb8 | 1578 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1579 | return; |
1580 | ||
1581 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1582 | return; | |
1583 | ||
ac155bb8 | 1584 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
31afa0a4 | 1585 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1586 | return; |
1587 | ||
ac155bb8 | 1588 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
31afa0a4 | 1589 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1590 | return; |
1591 | ||
ac155bb8 | 1592 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
31afa0a4 | 1593 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1594 | return; |
1595 | ||
ac155bb8 | 1596 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
31afa0a4 | 1597 | if (unit_active_or_pending(other)) |
b81884e7 LP |
1598 | return; |
1599 | ||
79008bdd | 1600 | log_unit_info(u->id, "Unit %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1601 | |
1602 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1603 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1604 | } |
1605 | ||
ff502445 LP |
1606 | static void unit_check_binds_to(Unit *u) { |
1607 | bool stop = false; | |
1608 | Unit *other; | |
1609 | Iterator i; | |
1610 | ||
1611 | assert(u); | |
1612 | ||
1613 | if (u->job) | |
1614 | return; | |
1615 | ||
1616 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1617 | return; | |
1618 | ||
1619 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1620 | if (other->job) | |
1621 | continue; | |
1622 | ||
1623 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1624 | continue; | |
1625 | ||
1626 | stop = true; | |
1627 | } | |
1628 | ||
1629 | if (!stop) | |
1630 | return; | |
1631 | ||
79008bdd | 1632 | log_unit_info(u->id, "Unit %s is bound to inactive service. Stopping, too.", u->id); |
ff502445 LP |
1633 | |
1634 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
1635 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); | |
1636 | } | |
1637 | ||
87f0e418 LP |
1638 | static void retroactively_start_dependencies(Unit *u) { |
1639 | Iterator i; | |
1640 | Unit *other; | |
1641 | ||
1642 | assert(u); | |
1643 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1644 | ||
ac155bb8 MS |
1645 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1646 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1647 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1648 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1649 | |
7f2cddae | 1650 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1651 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1652 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1653 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1654 | |
ac155bb8 MS |
1655 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1656 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1657 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1658 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1659 | |
ac155bb8 MS |
1660 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1661 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1662 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1663 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1664 | |
ac155bb8 | 1665 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1666 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1667 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1668 | |
ac155bb8 | 1669 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1670 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1671 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1672 | } |
1673 | ||
1674 | static void retroactively_stop_dependencies(Unit *u) { | |
1675 | Iterator i; | |
1676 | Unit *other; | |
1677 | ||
1678 | assert(u); | |
1679 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1680 | ||
b81884e7 | 1681 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1682 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1683 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1684 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1685 | } |
1686 | ||
1687 | static void check_unneeded_dependencies(Unit *u) { | |
1688 | Iterator i; | |
1689 | Unit *other; | |
1690 | ||
1691 | assert(u); | |
1692 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1693 | |
1694 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1695 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1696 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1697 | unit_check_unneeded(other); |
ac155bb8 | 1698 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1699 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1700 | unit_check_unneeded(other); |
ac155bb8 | 1701 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1702 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1703 | unit_check_unneeded(other); |
ac155bb8 | 1704 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1705 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1706 | unit_check_unneeded(other); |
ac155bb8 | 1707 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1708 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1709 | unit_check_unneeded(other); |
7f2cddae | 1710 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1711 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1712 | unit_check_unneeded(other); | |
87f0e418 LP |
1713 | } |
1714 | ||
3ecaa09b | 1715 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1716 | Unit *other; |
1717 | Iterator i; | |
1718 | ||
1719 | assert(u); | |
1720 | ||
ac155bb8 | 1721 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1722 | return; |
1723 | ||
79008bdd | 1724 | log_unit_info(u->id, "Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1725 | |
ac155bb8 | 1726 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1727 | int r; |
1728 | ||
d420282b | 1729 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d | 1730 | if (r < 0) |
31938a85 | 1731 | log_unit_error_errno(u->id, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1732 | } |
c0daa706 LP |
1733 | } |
1734 | ||
3ecaa09b LP |
1735 | void unit_trigger_notify(Unit *u) { |
1736 | Unit *other; | |
1737 | Iterator i; | |
1738 | ||
1739 | assert(u); | |
1740 | ||
1741 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1742 | if (UNIT_VTABLE(other)->trigger_notify) | |
1743 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1744 | } | |
1745 | ||
e2f3b44c | 1746 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1747 | Manager *m; |
7e6e7b06 | 1748 | bool unexpected; |
a096ed36 | 1749 | |
87f0e418 LP |
1750 | assert(u); |
1751 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1752 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1753 | |
8e471ccd LP |
1754 | /* Note that this is called for all low-level state changes, |
1755 | * even if they might map to the same high-level | |
865cc19a | 1756 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1757 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1758 | * this function will be called too! */ |
87f0e418 | 1759 | |
546ac4f0 MS |
1760 | m = u->manager; |
1761 | ||
f755e3b7 | 1762 | /* Update timestamps for state changes */ |
546ac4f0 | 1763 | if (m->n_reloading <= 0) { |
bdbf9951 | 1764 | dual_timestamp ts; |
173e3821 | 1765 | |
bdbf9951 | 1766 | dual_timestamp_get(&ts); |
173e3821 | 1767 | |
bdbf9951 | 1768 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1769 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1770 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1771 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1772 | |
1773 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1774 | u->active_enter_timestamp = ts; |
bdbf9951 | 1775 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1776 | u->active_exit_timestamp = ts; |
bdbf9951 | 1777 | } |
87f0e418 | 1778 | |
865cc19a | 1779 | /* Keep track of failed units */ |
3f3cc397 | 1780 | if (ns == UNIT_FAILED) |
f755e3b7 | 1781 | set_put(u->manager->failed_units, u); |
3f3cc397 | 1782 | else |
f755e3b7 LP |
1783 | set_remove(u->manager->failed_units, u); |
1784 | ||
1785 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1786 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
b1491eba | 1787 | unit_destroy_cgroup_if_empty(u); |
fb385181 | 1788 | |
9cd86184 | 1789 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1790 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1791 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1792 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1793 | ExecContext *ec; |
1794 | ||
1795 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1796 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1797 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1798 | m->n_on_console --; | |
1799 | ||
1800 | if (m->n_on_console == 0) | |
1801 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1802 | m->no_console_output = false; |
31a7eb86 ZJS |
1803 | } else |
1804 | m->n_on_console ++; | |
7ed9f6cd MS |
1805 | } |
1806 | } | |
1807 | ||
ac155bb8 | 1808 | if (u->job) { |
7e6e7b06 | 1809 | unexpected = false; |
87f0e418 | 1810 | |
ac155bb8 | 1811 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1812 | |
1813 | /* So we reached a different state for this | |
1814 | * job. Let's see if we can run it now if it | |
1815 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1816 | job_add_to_run_queue(u->job); |
87f0e418 | 1817 | |
b410e6b9 | 1818 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1819 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1820 | * hence needs to invalidate jobs. */ |
87f0e418 | 1821 | |
ac155bb8 | 1822 | switch (u->job->type) { |
87f0e418 | 1823 | |
b410e6b9 LP |
1824 | case JOB_START: |
1825 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1826 | |
b410e6b9 | 1827 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1828 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1829 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1830 | unexpected = true; |
41b02ec7 | 1831 | |
fdf20a31 | 1832 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1833 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1834 | } |
87f0e418 | 1835 | |
b410e6b9 | 1836 | break; |
87f0e418 | 1837 | |
b410e6b9 LP |
1838 | case JOB_RELOAD: |
1839 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1840 | |
ac155bb8 | 1841 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1842 | if (ns == UNIT_ACTIVE) |
5273510e | 1843 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1844 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1845 | unexpected = true; |
41b02ec7 | 1846 | |
fdf20a31 | 1847 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1848 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1849 | } |
b410e6b9 | 1850 | } |
87f0e418 | 1851 | |
b410e6b9 | 1852 | break; |
87f0e418 | 1853 | |
b410e6b9 LP |
1854 | case JOB_STOP: |
1855 | case JOB_RESTART: | |
1856 | case JOB_TRY_RESTART: | |
87f0e418 | 1857 | |
fdf20a31 | 1858 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1859 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1860 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1861 | unexpected = true; |
5273510e | 1862 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1863 | } |
87f0e418 | 1864 | |
b410e6b9 | 1865 | break; |
87f0e418 | 1866 | |
b410e6b9 LP |
1867 | default: |
1868 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1869 | } |
87f0e418 | 1870 | |
7e6e7b06 LP |
1871 | } else |
1872 | unexpected = true; | |
1873 | ||
546ac4f0 | 1874 | if (m->n_reloading <= 0) { |
f3bff0eb | 1875 | |
bdbf9951 LP |
1876 | /* If this state change happened without being |
1877 | * requested by a job, then let's retroactively start | |
1878 | * or stop dependencies. We skip that step when | |
1879 | * deserializing, since we don't want to create any | |
1880 | * additional jobs just because something is already | |
1881 | * activated. */ | |
1882 | ||
1883 | if (unexpected) { | |
1884 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1885 | retroactively_start_dependencies(u); | |
1886 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1887 | retroactively_stop_dependencies(u); | |
1888 | } | |
5de9682c | 1889 | |
cd0504d0 | 1890 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1891 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1892 | check_unneeded_dependencies(u); |
1893 | ||
bdbf9951 | 1894 | if (ns != os && ns == UNIT_FAILED) { |
79008bdd | 1895 | log_unit_notice(u->id, "Unit %s entered failed state.", u->id); |
3ecaa09b | 1896 | unit_start_on_failure(u); |
cd6d0a45 | 1897 | } |
3b2775c5 | 1898 | } |
e537352b | 1899 | |
3b2775c5 LP |
1900 | /* Some names are special */ |
1901 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1902 | ||
1903 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 1904 | /* The bus might have just become available, |
3b2775c5 LP |
1905 | * hence try to connect to it, if we aren't |
1906 | * yet connected. */ | |
546ac4f0 | 1907 | bus_init(m, true); |
3b2775c5 | 1908 | |
ac155bb8 | 1909 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1910 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1911 | m->n_reloading <= 0) { |
3b2775c5 | 1912 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1913 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1914 | u->in_audit = true; |
3b2775c5 | 1915 | } |
e983b760 | 1916 | |
3b2775c5 | 1917 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1918 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1919 | |
3b2775c5 | 1920 | } else { |
bdbf9951 | 1921 | |
3b2775c5 LP |
1922 | /* We don't care about D-Bus here, since we'll get an |
1923 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1924 | |
ac155bb8 | 1925 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1926 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1927 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1928 | m->n_reloading <= 0) { |
4927fcae | 1929 | |
3b2775c5 LP |
1930 | /* Hmm, if there was no start record written |
1931 | * write it now, so that we always have a nice | |
1932 | * pair */ | |
ac155bb8 | 1933 | if (!u->in_audit) { |
546ac4f0 | 1934 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1935 | |
3b2775c5 | 1936 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1937 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1938 | } else |
1939 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1940 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1941 | |
ac155bb8 | 1942 | u->in_audit = false; |
cd6d0a45 | 1943 | } |
f278026d LP |
1944 | } |
1945 | ||
546ac4f0 | 1946 | manager_recheck_journal(m); |
3ecaa09b | 1947 | unit_trigger_notify(u); |
3b2775c5 | 1948 | |
ff502445 LP |
1949 | if (u->manager->n_reloading <= 0) { |
1950 | /* Maybe we finished startup and are now ready for | |
1951 | * being stopped because unneeded? */ | |
bf6dcfa6 | 1952 | unit_check_unneeded(u); |
c1e1601e | 1953 | |
ff502445 LP |
1954 | /* Maybe we finished startup, but something we needed |
1955 | * has vanished? Let's die then. (This happens when | |
1956 | * something BindsTo= to a Type=oneshot unit, as these | |
1957 | * units go directly from starting to inactive, | |
1958 | * without ever entering started.) */ | |
1959 | unit_check_binds_to(u); | |
1960 | } | |
1961 | ||
c1e1601e | 1962 | unit_add_to_dbus_queue(u); |
701cc384 | 1963 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1964 | } |
1965 | ||
87f0e418 | 1966 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
1967 | int q, r; |
1968 | ||
87f0e418 LP |
1969 | assert(u); |
1970 | assert(pid >= 1); | |
1971 | ||
5ba6985b LP |
1972 | /* Watch a specific PID. We only support one or two units |
1973 | * watching each PID for now, not more. */ | |
1974 | ||
d5099efc | 1975 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
1976 | if (r < 0) |
1977 | return r; | |
1978 | ||
d5099efc | 1979 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
1980 | if (r < 0) |
1981 | return r; | |
1982 | ||
5ba6985b LP |
1983 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
1984 | if (r == -EEXIST) { | |
d5099efc | 1985 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
1986 | if (r < 0) |
1987 | return r; | |
05e343b7 | 1988 | |
5ba6985b LP |
1989 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
1990 | } | |
a911bb9a | 1991 | |
5ba6985b | 1992 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
a911bb9a LP |
1993 | if (q < 0) |
1994 | return q; | |
1995 | ||
1996 | return r; | |
87f0e418 LP |
1997 | } |
1998 | ||
1999 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2000 | assert(u); | |
2001 | assert(pid >= 1); | |
2002 | ||
5ba6985b LP |
2003 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2004 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
a911bb9a LP |
2005 | set_remove(u->pids, LONG_TO_PTR(pid)); |
2006 | } | |
2007 | ||
bd44e61b LP |
2008 | void unit_unwatch_all_pids(Unit *u) { |
2009 | assert(u); | |
2010 | ||
2011 | while (!set_isempty(u->pids)) | |
2012 | unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids))); | |
2013 | ||
2014 | set_free(u->pids); | |
2015 | u->pids = NULL; | |
2016 | } | |
2017 | ||
2018 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
a911bb9a LP |
2019 | _cleanup_closedir_ DIR *d = NULL; |
2020 | _cleanup_fclose_ FILE *f = NULL; | |
2021 | int ret = 0, r; | |
2022 | ||
2023 | assert(u); | |
2024 | assert(path); | |
2025 | ||
2026 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ | |
2027 | ||
2028 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
2029 | if (r >= 0) { | |
2030 | pid_t pid; | |
2031 | ||
2032 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
2033 | r = unit_watch_pid(u, pid); | |
2034 | if (r < 0 && ret >= 0) | |
2035 | ret = r; | |
2036 | } | |
2037 | if (r < 0 && ret >= 0) | |
2038 | ret = r; | |
2039 | ||
2040 | } else if (ret >= 0) | |
2041 | ret = r; | |
2042 | ||
2043 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
2044 | if (r >= 0) { | |
2045 | char *fn; | |
2046 | ||
2047 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
2048 | _cleanup_free_ char *p = NULL; | |
2049 | ||
2050 | p = strjoin(path, "/", fn, NULL); | |
2051 | free(fn); | |
2052 | ||
2053 | if (!p) | |
2054 | return -ENOMEM; | |
2055 | ||
bd44e61b | 2056 | r = unit_watch_pids_in_path(u, p); |
a911bb9a LP |
2057 | if (r < 0 && ret >= 0) |
2058 | ret = r; | |
2059 | } | |
2060 | if (r < 0 && ret >= 0) | |
2061 | ret = r; | |
2062 | ||
2063 | } else if (ret >= 0) | |
2064 | ret = r; | |
2065 | ||
2066 | return ret; | |
2067 | } | |
2068 | ||
a911bb9a LP |
2069 | int unit_watch_all_pids(Unit *u) { |
2070 | assert(u); | |
2071 | ||
a911bb9a LP |
2072 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ |
2073 | ||
bd44e61b LP |
2074 | if (!u->cgroup_path) |
2075 | return -ENOENT; | |
a911bb9a | 2076 | |
bd44e61b | 2077 | return unit_watch_pids_in_path(u, u->cgroup_path); |
a911bb9a LP |
2078 | } |
2079 | ||
2080 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2081 | Iterator i; | |
2082 | void *e; | |
2083 | ||
2084 | assert(u); | |
2085 | ||
2086 | /* Cleans dead PIDs from our list */ | |
2087 | ||
2088 | SET_FOREACH(e, u->pids, i) { | |
2089 | pid_t pid = PTR_TO_LONG(e); | |
2090 | ||
2091 | if (pid == except1 || pid == except2) | |
2092 | continue; | |
2093 | ||
9f5650ae | 2094 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2095 | unit_unwatch_pid(u, pid); |
a911bb9a | 2096 | } |
87f0e418 LP |
2097 | } |
2098 | ||
87f0e418 LP |
2099 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2100 | assert(u); | |
2101 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2102 | ||
2103 | switch (j) { | |
2104 | ||
2105 | case JOB_VERIFY_ACTIVE: | |
2106 | case JOB_START: | |
57339f47 | 2107 | case JOB_STOP: |
e0209d83 | 2108 | case JOB_NOP: |
87f0e418 LP |
2109 | return true; |
2110 | ||
87f0e418 LP |
2111 | case JOB_RESTART: |
2112 | case JOB_TRY_RESTART: | |
2113 | return unit_can_start(u); | |
2114 | ||
2115 | case JOB_RELOAD: | |
2116 | return unit_can_reload(u); | |
2117 | ||
2118 | case JOB_RELOAD_OR_START: | |
2119 | return unit_can_reload(u) && unit_can_start(u); | |
2120 | ||
2121 | default: | |
2122 | assert_not_reached("Invalid job type"); | |
2123 | } | |
2124 | } | |
2125 | ||
d1fab3fe | 2126 | static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency) { |
3f3cc397 LP |
2127 | assert(id); |
2128 | ||
d1fab3fe ZJS |
2129 | switch (dependency) { |
2130 | case UNIT_REQUIRES: | |
2131 | case UNIT_REQUIRES_OVERRIDABLE: | |
2132 | case UNIT_WANTS: | |
2133 | case UNIT_REQUISITE: | |
2134 | case UNIT_REQUISITE_OVERRIDABLE: | |
2135 | case UNIT_BINDS_TO: | |
2136 | case UNIT_PART_OF: | |
2137 | case UNIT_REQUIRED_BY: | |
2138 | case UNIT_REQUIRED_BY_OVERRIDABLE: | |
2139 | case UNIT_WANTED_BY: | |
2140 | case UNIT_BOUND_BY: | |
2141 | case UNIT_CONSISTS_OF: | |
2142 | case UNIT_REFERENCES: | |
2143 | case UNIT_REFERENCED_BY: | |
2144 | case UNIT_PROPAGATES_RELOAD_TO: | |
2145 | case UNIT_RELOAD_PROPAGATED_FROM: | |
2146 | case UNIT_JOINS_NAMESPACE_OF: | |
2147 | return 0; | |
2148 | ||
2149 | case UNIT_CONFLICTS: | |
2150 | case UNIT_CONFLICTED_BY: | |
2151 | case UNIT_BEFORE: | |
2152 | case UNIT_AFTER: | |
2153 | case UNIT_ON_FAILURE: | |
2154 | case UNIT_TRIGGERS: | |
2155 | case UNIT_TRIGGERED_BY: | |
2156 | if (streq_ptr(id, other)) | |
79008bdd | 2157 | log_unit_warning(id, "Dependency %s=%s dropped from unit %s", |
d1fab3fe ZJS |
2158 | unit_dependency_to_string(dependency), id, other); |
2159 | else | |
79008bdd | 2160 | log_unit_warning(id, "Dependency %s=%s dropped from unit %s merged into %s", |
d1fab3fe ZJS |
2161 | unit_dependency_to_string(dependency), id, |
2162 | strna(other), id); | |
2163 | return -EINVAL; | |
2164 | ||
2165 | case _UNIT_DEPENDENCY_MAX: | |
2166 | case _UNIT_DEPENDENCY_INVALID: | |
2167 | break; | |
2168 | } | |
3f3cc397 | 2169 | |
d1fab3fe ZJS |
2170 | assert_not_reached("Invalid dependency type"); |
2171 | } | |
2172 | ||
701cc384 | 2173 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2174 | |
2175 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2176 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2177 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
2178 | [UNIT_WANTS] = UNIT_WANTED_BY, |
2179 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2180 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 2181 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2182 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 2183 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 2184 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 2185 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 2186 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2187 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2188 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2189 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2190 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2191 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2192 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2193 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2194 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2195 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2196 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2197 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2198 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2199 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2200 | }; |
701cc384 | 2201 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2202 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2203 | |
2204 | assert(u); | |
2205 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2206 | assert(other); |
2207 | ||
9f151f29 LP |
2208 | u = unit_follow_merge(u); |
2209 | other = unit_follow_merge(other); | |
2210 | ||
87f0e418 LP |
2211 | /* We won't allow dependencies on ourselves. We will not |
2212 | * consider them an error however. */ | |
d1fab3fe ZJS |
2213 | if (u == other) { |
2214 | maybe_warn_about_dependency(orig_u->id, orig_other->id, d); | |
87f0e418 | 2215 | return 0; |
d1fab3fe | 2216 | } |
87f0e418 | 2217 | |
d5099efc | 2218 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2219 | if (r < 0) |
87f0e418 LP |
2220 | return r; |
2221 | ||
613b411c | 2222 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2223 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2224 | if (r < 0) |
2225 | return r; | |
2226 | } | |
2227 | ||
2228 | if (add_reference) { | |
d5099efc | 2229 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2230 | if (r < 0) |
5de9682c LP |
2231 | return r; |
2232 | ||
d5099efc | 2233 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2234 | if (r < 0) |
701cc384 | 2235 | return r; |
613b411c | 2236 | } |
87f0e418 | 2237 | |
613b411c LP |
2238 | q = set_put(u->dependencies[d], other); |
2239 | if (q < 0) | |
701cc384 | 2240 | return q; |
87f0e418 | 2241 | |
613b411c LP |
2242 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2243 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2244 | if (v < 0) { | |
5de9682c LP |
2245 | r = v; |
2246 | goto fail; | |
2247 | } | |
613b411c | 2248 | } |
701cc384 LP |
2249 | |
2250 | if (add_reference) { | |
613b411c LP |
2251 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2252 | if (w < 0) { | |
701cc384 LP |
2253 | r = w; |
2254 | goto fail; | |
2255 | } | |
2256 | ||
613b411c LP |
2257 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2258 | if (r < 0) | |
701cc384 | 2259 | goto fail; |
87f0e418 LP |
2260 | } |
2261 | ||
c1e1601e | 2262 | unit_add_to_dbus_queue(u); |
87f0e418 | 2263 | return 0; |
701cc384 LP |
2264 | |
2265 | fail: | |
2266 | if (q > 0) | |
ac155bb8 | 2267 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2268 | |
2269 | if (v > 0) | |
ac155bb8 | 2270 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2271 | |
2272 | if (w > 0) | |
ac155bb8 | 2273 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2274 | |
2275 | return r; | |
87f0e418 | 2276 | } |
0301abf4 | 2277 | |
2c966c03 LP |
2278 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2279 | int r; | |
2280 | ||
2281 | assert(u); | |
2282 | ||
3f3cc397 LP |
2283 | r = unit_add_dependency(u, d, other, add_reference); |
2284 | if (r < 0) | |
2c966c03 LP |
2285 | return r; |
2286 | ||
3f3cc397 LP |
2287 | r = unit_add_dependency(u, e, other, add_reference); |
2288 | if (r < 0) | |
2c966c03 LP |
2289 | return r; |
2290 | ||
2291 | return 0; | |
2292 | } | |
2293 | ||
9e2f7c11 LP |
2294 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
2295 | char *s; | |
2296 | ||
2297 | assert(u); | |
2298 | assert(name || path); | |
8afbb8e1 | 2299 | assert(p); |
9e2f7c11 LP |
2300 | |
2301 | if (!name) | |
2b6bf07d | 2302 | name = basename(path); |
9e2f7c11 LP |
2303 | |
2304 | if (!unit_name_is_template(name)) { | |
2305 | *p = NULL; | |
2306 | return name; | |
2307 | } | |
2308 | ||
ac155bb8 MS |
2309 | if (u->instance) |
2310 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 | 2311 | else { |
ae018d9b | 2312 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2313 | |
8afbb8e1 LP |
2314 | i = unit_name_to_prefix(u->id); |
2315 | if (!i) | |
9e2f7c11 LP |
2316 | return NULL; |
2317 | ||
2318 | s = unit_name_replace_instance(name, i); | |
9e2f7c11 LP |
2319 | } |
2320 | ||
2321 | if (!s) | |
2322 | return NULL; | |
2323 | ||
2324 | *p = s; | |
2325 | return s; | |
2326 | } | |
2327 | ||
701cc384 | 2328 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
2329 | Unit *other; |
2330 | int r; | |
8afbb8e1 | 2331 | _cleanup_free_ char *s = NULL; |
09b6b09f | 2332 | |
9e2f7c11 LP |
2333 | assert(u); |
2334 | assert(name || path); | |
09b6b09f | 2335 | |
8afbb8e1 LP |
2336 | name = resolve_template(u, name, path, &s); |
2337 | if (!name) | |
9e2f7c11 | 2338 | return -ENOMEM; |
09b6b09f | 2339 | |
8afbb8e1 LP |
2340 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2341 | if (r < 0) | |
2342 | return r; | |
9e2f7c11 | 2343 | |
8afbb8e1 | 2344 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2345 | } |
2346 | ||
2c966c03 | 2347 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
3f3cc397 | 2348 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2349 | Unit *other; |
2350 | int r; | |
2c966c03 LP |
2351 | |
2352 | assert(u); | |
2353 | assert(name || path); | |
2354 | ||
3f3cc397 LP |
2355 | name = resolve_template(u, name, path, &s); |
2356 | if (!name) | |
2c966c03 LP |
2357 | return -ENOMEM; |
2358 | ||
3f3cc397 LP |
2359 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2360 | if (r < 0) | |
68eda4bd | 2361 | return r; |
2c966c03 | 2362 | |
3f3cc397 | 2363 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2364 | } |
2365 | ||
701cc384 | 2366 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
2367 | Unit *other; |
2368 | int r; | |
68eda4bd | 2369 | _cleanup_free_ char *s = NULL; |
bd77d0fc | 2370 | |
9e2f7c11 LP |
2371 | assert(u); |
2372 | assert(name || path); | |
bd77d0fc | 2373 | |
3f3cc397 LP |
2374 | name = resolve_template(u, name, path, &s); |
2375 | if (!name) | |
9e2f7c11 | 2376 | return -ENOMEM; |
bd77d0fc | 2377 | |
3f3cc397 LP |
2378 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2379 | if (r < 0) | |
68eda4bd | 2380 | return r; |
9e2f7c11 | 2381 | |
3f3cc397 | 2382 | return unit_add_dependency(other, d, u, add_reference); |
bd77d0fc LP |
2383 | } |
2384 | ||
2c966c03 LP |
2385 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2386 | Unit *other; | |
2387 | int r; | |
68eda4bd | 2388 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2389 | |
2390 | assert(u); | |
2391 | assert(name || path); | |
2392 | ||
3f3cc397 LP |
2393 | name = resolve_template(u, name, path, &s); |
2394 | if (!name) | |
2c966c03 LP |
2395 | return -ENOMEM; |
2396 | ||
3f3cc397 LP |
2397 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2398 | if (r < 0) | |
68eda4bd | 2399 | return r; |
2c966c03 | 2400 | |
3f3cc397 LP |
2401 | r = unit_add_two_dependencies(other, d, e, u, add_reference); |
2402 | if (r < 0) | |
68eda4bd | 2403 | return r; |
2c966c03 | 2404 | |
2c966c03 LP |
2405 | return r; |
2406 | } | |
2407 | ||
0301abf4 | 2408 | int set_unit_path(const char *p) { |
0301abf4 | 2409 | /* This is mostly for debug purposes */ |
cf7d80a5 | 2410 | if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0) |
26d04f86 | 2411 | return -errno; |
0301abf4 LP |
2412 | |
2413 | return 0; | |
2414 | } | |
88066b3a | 2415 | |
ea430986 | 2416 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2417 | assert(u); |
2418 | ||
ac155bb8 | 2419 | if (!u->id) |
04ade7d2 LP |
2420 | return NULL; |
2421 | ||
48899192 | 2422 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2423 | } |
2424 | ||
41f9172f | 2425 | char *unit_default_cgroup_path(Unit *u) { |
d7bd3de0 | 2426 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
a016b922 | 2427 | int r; |
5954c074 | 2428 | |
013b87c0 LP |
2429 | assert(u); |
2430 | ||
4ad49000 LP |
2431 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2432 | return strdup(u->manager->cgroup_root); | |
2433 | ||
2434 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2435 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2436 | if (r < 0) | |
2437 | return NULL; | |
2438 | } | |
2439 | ||
d7bd3de0 LP |
2440 | escaped = cg_escape(u->id); |
2441 | if (!escaped) | |
5954c074 LP |
2442 | return NULL; |
2443 | ||
d7bd3de0 LP |
2444 | if (slice) |
2445 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2446 | else | |
2447 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
013b87c0 LP |
2448 | } |
2449 | ||
598459ce | 2450 | int unit_add_default_slice(Unit *u, CGroupContext *c) { |
a8833944 LP |
2451 | _cleanup_free_ char *b = NULL; |
2452 | const char *slice_name; | |
a016b922 LP |
2453 | Unit *slice; |
2454 | int r; | |
2455 | ||
2456 | assert(u); | |
598459ce | 2457 | assert(c); |
a016b922 | 2458 | |
9444b1f2 | 2459 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2460 | return 0; |
2461 | ||
a8833944 LP |
2462 | if (u->instance) { |
2463 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2464 | |
a8833944 LP |
2465 | /* Implicitly place all instantiated units in their |
2466 | * own per-template slice */ | |
2467 | ||
2468 | prefix = unit_name_to_prefix(u->id); | |
2469 | if (!prefix) | |
2470 | return -ENOMEM; | |
2471 | ||
2472 | /* The prefix is already escaped, but it might include | |
2473 | * "-" which has a special meaning for slice units, | |
2474 | * hence escape it here extra. */ | |
2475 | escaped = strreplace(prefix, "-", "\\x2d"); | |
2476 | if (!escaped) | |
2477 | return -ENOMEM; | |
2478 | ||
2479 | if (u->manager->running_as == SYSTEMD_SYSTEM) | |
2480 | b = strjoin("system-", escaped, ".slice", NULL); | |
2481 | else | |
2482 | b = strappend(escaped, ".slice"); | |
2483 | if (!b) | |
2484 | return -ENOMEM; | |
2485 | ||
2486 | slice_name = b; | |
2487 | } else | |
2488 | slice_name = | |
2489 | u->manager->running_as == SYSTEMD_SYSTEM | |
2490 | ? SPECIAL_SYSTEM_SLICE | |
2491 | : SPECIAL_ROOT_SLICE; | |
2492 | ||
2493 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2494 | if (r < 0) |
2495 | return r; | |
2496 | ||
2497 | unit_ref_set(&u->slice, slice); | |
2498 | return 0; | |
2499 | } | |
2500 | ||
9444b1f2 LP |
2501 | const char *unit_slice_name(Unit *u) { |
2502 | assert(u); | |
2503 | ||
2504 | if (!UNIT_ISSET(u->slice)) | |
2505 | return NULL; | |
2506 | ||
2507 | return UNIT_DEREF(u->slice)->id; | |
2508 | } | |
2509 | ||
f6ff8c29 | 2510 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2511 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2512 | int r; |
2513 | ||
2514 | assert(u); | |
2515 | assert(type); | |
2516 | assert(_found); | |
2517 | ||
78edb35a LP |
2518 | t = unit_name_change_suffix(u->id, type); |
2519 | if (!t) | |
f6ff8c29 LP |
2520 | return -ENOMEM; |
2521 | ||
2522 | assert(!unit_has_name(u, t)); | |
2523 | ||
ac155bb8 | 2524 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2525 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2526 | return r; |
2527 | } | |
2528 | ||
05e343b7 LP |
2529 | int unit_watch_bus_name(Unit *u, const char *name) { |
2530 | assert(u); | |
2531 | assert(name); | |
2532 | ||
2533 | /* Watch a specific name on the bus. We only support one unit | |
2534 | * watching each name for now. */ | |
2535 | ||
ac155bb8 | 2536 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2537 | } |
2538 | ||
2539 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2540 | assert(u); | |
2541 | assert(name); | |
2542 | ||
ac155bb8 | 2543 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2544 | } |
2545 | ||
a16e1123 LP |
2546 | bool unit_can_serialize(Unit *u) { |
2547 | assert(u); | |
2548 | ||
2549 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2550 | } | |
2551 | ||
6b78f9b4 | 2552 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2553 | int r; |
2554 | ||
2555 | assert(u); | |
2556 | assert(f); | |
2557 | assert(fds); | |
2558 | ||
9bdb98c5 LP |
2559 | if (unit_can_serialize(u)) { |
2560 | ExecRuntime *rt; | |
a16e1123 | 2561 | |
9bdb98c5 | 2562 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2563 | if (r < 0) |
2564 | return r; | |
9bdb98c5 LP |
2565 | |
2566 | rt = unit_get_exec_runtime(u); | |
2567 | if (rt) { | |
2568 | r = exec_runtime_serialize(rt, u, f, fds); | |
2569 | if (r < 0) | |
2570 | return r; | |
2571 | } | |
e0209d83 MS |
2572 | } |
2573 | ||
ac155bb8 MS |
2574 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2575 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2576 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2577 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2578 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
59fccdc5 | 2579 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2580 | |
ac155bb8 MS |
2581 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2582 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2583 | |
59fccdc5 LP |
2584 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2585 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2586 | ||
c2756a68 LP |
2587 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
2588 | ||
2589 | if (u->cgroup_path) | |
2590 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
2591 | ||
613b411c LP |
2592 | if (serialize_jobs) { |
2593 | if (u->job) { | |
2594 | fprintf(f, "job\n"); | |
2595 | job_serialize(u->job, f, fds); | |
2596 | } | |
2597 | ||
2598 | if (u->nop_job) { | |
2599 | fprintf(f, "job\n"); | |
2600 | job_serialize(u->nop_job, f, fds); | |
2601 | } | |
2602 | } | |
2603 | ||
a16e1123 LP |
2604 | /* End marker */ |
2605 | fputc('\n', f); | |
2606 | return 0; | |
2607 | } | |
2608 | ||
2609 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2610 | va_list ap; | |
2611 | ||
2612 | assert(u); | |
2613 | assert(f); | |
2614 | assert(key); | |
2615 | assert(format); | |
2616 | ||
2617 | fputs(key, f); | |
2618 | fputc('=', f); | |
2619 | ||
2620 | va_start(ap, format); | |
2621 | vfprintf(f, format, ap); | |
2622 | va_end(ap); | |
2623 | ||
2624 | fputc('\n', f); | |
2625 | } | |
2626 | ||
2627 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2628 | assert(u); | |
2629 | assert(f); | |
2630 | assert(key); | |
2631 | assert(value); | |
2632 | ||
2633 | fprintf(f, "%s=%s\n", key, value); | |
2634 | } | |
2635 | ||
2636 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
28b99ccd | 2637 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2638 | size_t offset; |
a16e1123 LP |
2639 | int r; |
2640 | ||
2641 | assert(u); | |
2642 | assert(f); | |
2643 | assert(fds); | |
2644 | ||
613b411c LP |
2645 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2646 | if (offset > 0) | |
2647 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2648 | ||
a16e1123 | 2649 | for (;;) { |
20c03b7b | 2650 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2651 | size_t k; |
2652 | ||
2653 | if (!fgets(line, sizeof(line), f)) { | |
2654 | if (feof(f)) | |
2655 | return 0; | |
2656 | return -errno; | |
2657 | } | |
2658 | ||
10f8e83c | 2659 | char_array_0(line); |
a16e1123 LP |
2660 | l = strstrip(line); |
2661 | ||
2662 | /* End marker */ | |
2663 | if (l[0] == 0) | |
2664 | return 0; | |
2665 | ||
2666 | k = strcspn(l, "="); | |
2667 | ||
2668 | if (l[k] == '=') { | |
2669 | l[k] = 0; | |
2670 | v = l+k+1; | |
2671 | } else | |
2672 | v = l+k; | |
2673 | ||
cca098b0 | 2674 | if (streq(l, "job")) { |
39a18c60 MS |
2675 | if (v[0] == '\0') { |
2676 | /* new-style serialized job */ | |
9c3349e2 LP |
2677 | Job *j; |
2678 | ||
2679 | j = job_new_raw(u); | |
39a18c60 MS |
2680 | if (!j) |
2681 | return -ENOMEM; | |
2682 | ||
2683 | r = job_deserialize(j, f, fds); | |
2684 | if (r < 0) { | |
2685 | job_free(j); | |
2686 | return r; | |
2687 | } | |
cca098b0 | 2688 | |
39a18c60 MS |
2689 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2690 | if (r < 0) { | |
2691 | job_free(j); | |
2692 | return r; | |
2693 | } | |
e0209d83 MS |
2694 | |
2695 | r = job_install_deserialized(j); | |
2696 | if (r < 0) { | |
2697 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2698 | job_free(j); | |
2699 | return r; | |
2700 | } | |
39a18c60 MS |
2701 | } else { |
2702 | /* legacy */ | |
9c3349e2 LP |
2703 | JobType type; |
2704 | ||
2705 | type = job_type_from_string(v); | |
39a18c60 MS |
2706 | if (type < 0) |
2707 | log_debug("Failed to parse job type value %s", v); | |
2708 | else | |
2709 | u->deserialized_job = type; | |
2710 | } | |
cca098b0 | 2711 | continue; |
8aaf019b | 2712 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2713 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2714 | continue; |
2715 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2716 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2717 | continue; |
2718 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2719 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2720 | continue; |
2721 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2722 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2723 | continue; |
2791a8f8 | 2724 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2725 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2726 | continue; |
59fccdc5 LP |
2727 | } else if (streq(l, "assert-timestamp")) { |
2728 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2729 | continue; | |
2791a8f8 LP |
2730 | } else if (streq(l, "condition-result")) { |
2731 | int b; | |
2732 | ||
c2756a68 LP |
2733 | b = parse_boolean(v); |
2734 | if (b < 0) | |
2791a8f8 LP |
2735 | log_debug("Failed to parse condition result value %s", v); |
2736 | else | |
ac155bb8 | 2737 | u->condition_result = b; |
efbac6d2 LP |
2738 | |
2739 | continue; | |
c2756a68 | 2740 | |
59fccdc5 LP |
2741 | } else if (streq(l, "assert-result")) { |
2742 | int b; | |
2743 | ||
2744 | b = parse_boolean(v); | |
2745 | if (b < 0) | |
2746 | log_debug("Failed to parse assert result value %s", v); | |
2747 | else | |
2748 | u->assert_result = b; | |
2749 | ||
2750 | continue; | |
2751 | ||
c2756a68 LP |
2752 | } else if (streq(l, "transient")) { |
2753 | int b; | |
2754 | ||
2755 | b = parse_boolean(v); | |
2756 | if (b < 0) | |
2757 | log_debug("Failed to parse transient bool %s", v); | |
2758 | else | |
2759 | u->transient = b; | |
2760 | ||
2761 | continue; | |
2762 | } else if (streq(l, "cgroup")) { | |
2763 | char *s; | |
2764 | ||
2765 | s = strdup(v); | |
f440e1bb | 2766 | if (!s) |
c2756a68 LP |
2767 | return -ENOMEM; |
2768 | ||
4e595329 ZJS |
2769 | if (u->cgroup_path) { |
2770 | void *p; | |
2771 | ||
2772 | p = hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
2773 | log_info("Removing cgroup_path %s from hashmap (%p)", | |
2774 | u->cgroup_path, p); | |
2775 | free(u->cgroup_path); | |
2776 | } | |
72673e86 | 2777 | |
4e595329 | 2778 | u->cgroup_path = s; |
b58b8e11 | 2779 | assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1); |
4e595329 | 2780 | |
c2756a68 | 2781 | continue; |
8aaf019b | 2782 | } |
cca098b0 | 2783 | |
9bdb98c5 LP |
2784 | if (unit_can_serialize(u)) { |
2785 | if (rt) { | |
2786 | r = exec_runtime_deserialize_item(rt, u, l, v, fds); | |
2787 | if (r < 0) | |
2788 | return r; | |
2789 | if (r > 0) | |
2790 | continue; | |
2791 | } | |
2792 | ||
2793 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c LP |
2794 | if (r < 0) |
2795 | return r; | |
613b411c | 2796 | } |
a16e1123 LP |
2797 | } |
2798 | } | |
2799 | ||
6e2ef85b LP |
2800 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2801 | Unit *device; | |
68eda4bd | 2802 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2803 | int r; |
2804 | ||
2805 | assert(u); | |
2806 | ||
2807 | if (!what) | |
2808 | return 0; | |
2809 | ||
2810 | /* Adds in links to the device node that this unit is based on */ | |
2811 | ||
8407a5d0 | 2812 | if (!is_device_path(what)) |
6e2ef85b LP |
2813 | return 0; |
2814 | ||
35eb6b12 LP |
2815 | e = unit_name_from_path(what, ".device"); |
2816 | if (!e) | |
6e2ef85b LP |
2817 | return -ENOMEM; |
2818 | ||
ac155bb8 | 2819 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
68eda4bd | 2820 | |
6e2ef85b LP |
2821 | if (r < 0) |
2822 | return r; | |
2823 | ||
faa368e3 LP |
2824 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true); |
2825 | if (r < 0) | |
6e2ef85b LP |
2826 | return r; |
2827 | ||
faa368e3 LP |
2828 | if (wants) { |
2829 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2830 | if (r < 0) | |
6e2ef85b | 2831 | return r; |
faa368e3 | 2832 | } |
6e2ef85b LP |
2833 | |
2834 | return 0; | |
2835 | } | |
a16e1123 | 2836 | |
cca098b0 LP |
2837 | int unit_coldplug(Unit *u) { |
2838 | int r; | |
2839 | ||
2840 | assert(u); | |
2841 | ||
2842 | if (UNIT_VTABLE(u)->coldplug) | |
2843 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2844 | return r; | |
2845 | ||
39a18c60 MS |
2846 | if (u->job) { |
2847 | r = job_coldplug(u->job); | |
2848 | if (r < 0) | |
2849 | return r; | |
2850 | } else if (u->deserialized_job >= 0) { | |
2851 | /* legacy */ | |
2852 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2853 | if (r < 0) | |
cca098b0 LP |
2854 | return r; |
2855 | ||
ac155bb8 | 2856 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2857 | } |
2858 | ||
2859 | return 0; | |
2860 | } | |
2861 | ||
49b1d377 | 2862 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2863 | DISABLE_WARNING_FORMAT_NONLITERAL; |
127d5fd1 ZJS |
2864 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, |
2865 | status, unit_status_msg_format, unit_description(u)); | |
bcfce235 | 2866 | REENABLE_WARNING; |
49b1d377 MS |
2867 | } |
2868 | ||
45fb0699 | 2869 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2870 | _cleanup_strv_free_ char **t = NULL; |
2871 | char **path; | |
1b64d026 | 2872 | struct stat st; |
ae7a7182 | 2873 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2874 | |
45fb0699 LP |
2875 | assert(u); |
2876 | ||
ac155bb8 | 2877 | if (u->fragment_path) { |
5f4b19f4 | 2878 | zero(st); |
ac155bb8 | 2879 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2880 | /* What, cannot access this anymore? */ |
2881 | return true; | |
45fb0699 | 2882 | |
ac155bb8 MS |
2883 | if (u->fragment_mtime > 0 && |
2884 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2885 | return true; |
2886 | } | |
2887 | ||
1b64d026 LP |
2888 | if (u->source_path) { |
2889 | zero(st); | |
2890 | if (stat(u->source_path, &st) < 0) | |
2891 | return true; | |
2892 | ||
2893 | if (u->source_mtime > 0 && | |
2894 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2895 | return true; | |
2896 | } | |
5f4b19f4 | 2897 | |
1a7f1b38 | 2898 | (void) unit_find_dropin_paths(u, &t); |
ae7a7182 OS |
2899 | loaded_cnt = strv_length(t); |
2900 | current_cnt = strv_length(u->dropin_paths); | |
2901 | ||
2902 | if (loaded_cnt == current_cnt) { | |
2903 | if (loaded_cnt == 0) | |
2904 | return false; | |
2905 | ||
2906 | if (strv_overlap(u->dropin_paths, t)) { | |
2907 | STRV_FOREACH(path, u->dropin_paths) { | |
2908 | zero(st); | |
2909 | if (stat(*path, &st) < 0) | |
2910 | return true; | |
2911 | ||
2912 | if (u->dropin_mtime > 0 && | |
2913 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2914 | return true; | |
2915 | } | |
2916 | ||
2917 | return false; | |
2918 | } else | |
2919 | return true; | |
2920 | } else | |
2921 | return true; | |
45fb0699 LP |
2922 | } |
2923 | ||
fdf20a31 | 2924 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2925 | assert(u); |
2926 | ||
fdf20a31 MM |
2927 | if (UNIT_VTABLE(u)->reset_failed) |
2928 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2929 | } |
2930 | ||
a7f241db LP |
2931 | Unit *unit_following(Unit *u) { |
2932 | assert(u); | |
2933 | ||
2934 | if (UNIT_VTABLE(u)->following) | |
2935 | return UNIT_VTABLE(u)->following(u); | |
2936 | ||
2937 | return NULL; | |
2938 | } | |
2939 | ||
31afa0a4 | 2940 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2941 | assert(u); |
2942 | ||
31afa0a4 LP |
2943 | /* This call does check the current state of the unit. It's |
2944 | * hence useful to be called from state change calls of the | |
2945 | * unit itself, where the state isn't updated yet. This is | |
2946 | * different from unit_inactive_or_pending() which checks both | |
2947 | * the current state and for a queued job. */ | |
18ffdfda | 2948 | |
31afa0a4 LP |
2949 | return u->job && u->job->type == JOB_STOP; |
2950 | } | |
2951 | ||
2952 | bool unit_inactive_or_pending(Unit *u) { | |
2953 | assert(u); | |
2954 | ||
2955 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 2956 | |
d956ac29 LP |
2957 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
2958 | return true; | |
2959 | ||
31afa0a4 | 2960 | if (unit_stop_pending(u)) |
18ffdfda LP |
2961 | return true; |
2962 | ||
2963 | return false; | |
2964 | } | |
2965 | ||
31afa0a4 | 2966 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
2967 | assert(u); |
2968 | ||
f60c2665 | 2969 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2970 | |
2971 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2972 | return true; | |
2973 | ||
ac155bb8 MS |
2974 | if (u->job && |
2975 | (u->job->type == JOB_START || | |
2976 | u->job->type == JOB_RELOAD_OR_START || | |
2977 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2978 | return true; |
2979 | ||
2980 | return false; | |
2981 | } | |
2982 | ||
718db961 | 2983 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
2984 | assert(u); |
2985 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2986 | assert(signo > 0); |
2987 | assert(signo < _NSIG); | |
2988 | ||
8a0867d6 LP |
2989 | if (!UNIT_VTABLE(u)->kill) |
2990 | return -ENOTSUP; | |
2991 | ||
c74f17d9 | 2992 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2993 | } |
2994 | ||
82659fd7 LP |
2995 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
2996 | Set *pid_set; | |
2997 | int r; | |
2998 | ||
d5099efc | 2999 | pid_set = set_new(NULL); |
82659fd7 LP |
3000 | if (!pid_set) |
3001 | return NULL; | |
3002 | ||
3003 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3004 | if (main_pid > 0) { | |
3005 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
3006 | if (r < 0) | |
3007 | goto fail; | |
3008 | } | |
3009 | ||
3010 | if (control_pid > 0) { | |
3011 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
3012 | if (r < 0) | |
3013 | goto fail; | |
3014 | } | |
3015 | ||
3016 | return pid_set; | |
3017 | ||
3018 | fail: | |
3019 | set_free(pid_set); | |
3020 | return NULL; | |
3021 | } | |
3022 | ||
d91c34f2 LP |
3023 | int unit_kill_common( |
3024 | Unit *u, | |
3025 | KillWho who, | |
3026 | int signo, | |
3027 | pid_t main_pid, | |
3028 | pid_t control_pid, | |
718db961 | 3029 | sd_bus_error *error) { |
d91c34f2 | 3030 | |
814cc562 MS |
3031 | int r = 0; |
3032 | ||
3033 | if (who == KILL_MAIN && main_pid <= 0) { | |
3034 | if (main_pid < 0) | |
7358dc02 | 3035 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
814cc562 | 3036 | else |
7358dc02 | 3037 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3038 | } |
3039 | ||
3040 | if (who == KILL_CONTROL && control_pid <= 0) { | |
3041 | if (control_pid < 0) | |
7358dc02 | 3042 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
814cc562 | 3043 | else |
7358dc02 | 3044 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3045 | } |
3046 | ||
3047 | if (who == KILL_CONTROL || who == KILL_ALL) | |
3048 | if (control_pid > 0) | |
3049 | if (kill(control_pid, signo) < 0) | |
3050 | r = -errno; | |
3051 | ||
3052 | if (who == KILL_MAIN || who == KILL_ALL) | |
3053 | if (main_pid > 0) | |
3054 | if (kill(main_pid, signo) < 0) | |
3055 | r = -errno; | |
3056 | ||
4ad49000 | 3057 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
3058 | _cleanup_set_free_ Set *pid_set = NULL; |
3059 | int q; | |
3060 | ||
82659fd7 LP |
3061 | /* Exclude the main/control pids from being killed via the cgroup */ |
3062 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3063 | if (!pid_set) |
3064 | return -ENOMEM; | |
3065 | ||
4ad49000 | 3066 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
3067 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3068 | r = q; | |
3069 | } | |
3070 | ||
3071 | return r; | |
3072 | } | |
3073 | ||
6210e7fc LP |
3074 | int unit_following_set(Unit *u, Set **s) { |
3075 | assert(u); | |
3076 | assert(s); | |
3077 | ||
3078 | if (UNIT_VTABLE(u)->following_set) | |
3079 | return UNIT_VTABLE(u)->following_set(u, s); | |
3080 | ||
3081 | *s = NULL; | |
3082 | return 0; | |
3083 | } | |
3084 | ||
a4375746 LP |
3085 | UnitFileState unit_get_unit_file_state(Unit *u) { |
3086 | assert(u); | |
3087 | ||
ac155bb8 MS |
3088 | if (u->unit_file_state < 0 && u->fragment_path) |
3089 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 3090 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 3091 | NULL, basename(u->fragment_path)); |
a4375746 | 3092 | |
ac155bb8 | 3093 | return u->unit_file_state; |
a4375746 LP |
3094 | } |
3095 | ||
d2dc52db LP |
3096 | int unit_get_unit_file_preset(Unit *u) { |
3097 | assert(u); | |
3098 | ||
3099 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3100 | u->unit_file_preset = unit_file_query_preset( | |
3101 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, | |
3102 | NULL, basename(u->fragment_path)); | |
3103 | ||
3104 | return u->unit_file_preset; | |
3105 | } | |
3106 | ||
57020a3a LP |
3107 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3108 | assert(ref); | |
3109 | assert(u); | |
3110 | ||
3111 | if (ref->unit) | |
3112 | unit_ref_unset(ref); | |
3113 | ||
3114 | ref->unit = u; | |
71fda00f | 3115 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3116 | return u; |
3117 | } | |
3118 | ||
3119 | void unit_ref_unset(UnitRef *ref) { | |
3120 | assert(ref); | |
3121 | ||
3122 | if (!ref->unit) | |
3123 | return; | |
3124 | ||
71fda00f | 3125 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3126 | ref->unit = NULL; |
3127 | } | |
3128 | ||
598459ce LP |
3129 | int unit_patch_contexts(Unit *u) { |
3130 | CGroupContext *cc; | |
3131 | ExecContext *ec; | |
cba6e062 LP |
3132 | unsigned i; |
3133 | int r; | |
3134 | ||
e06c73cc | 3135 | assert(u); |
e06c73cc | 3136 | |
598459ce LP |
3137 | /* Patch in the manager defaults into the exec and cgroup |
3138 | * contexts, _after_ the rest of the settings have been | |
3139 | * initialized */ | |
085afe36 | 3140 | |
598459ce LP |
3141 | ec = unit_get_exec_context(u); |
3142 | if (ec) { | |
3143 | /* This only copies in the ones that need memory */ | |
3144 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3145 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3146 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3147 | if (!ec->rlimit[i]) | |
3148 | return -ENOMEM; | |
3149 | } | |
3150 | ||
3151 | if (u->manager->running_as == SYSTEMD_USER && | |
3152 | !ec->working_directory) { | |
3153 | ||
3154 | r = get_home_dir(&ec->working_directory); | |
3155 | if (r < 0) | |
3156 | return r; | |
cba6e062 LP |
3157 | } |
3158 | ||
598459ce LP |
3159 | if (u->manager->running_as == SYSTEMD_USER && |
3160 | (ec->syscall_whitelist || | |
3161 | !set_isempty(ec->syscall_filter) || | |
3162 | !set_isempty(ec->syscall_archs) || | |
3163 | ec->address_families_whitelist || | |
3164 | !set_isempty(ec->address_families))) | |
3165 | ec->no_new_privileges = true; | |
e06c73cc | 3166 | |
598459ce LP |
3167 | if (ec->private_devices) |
3168 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
cba6e062 LP |
3169 | } |
3170 | ||
598459ce LP |
3171 | cc = unit_get_cgroup_context(u); |
3172 | if (cc) { | |
f513e420 | 3173 | |
598459ce LP |
3174 | if (ec && |
3175 | ec->private_devices && | |
3176 | cc->device_policy == CGROUP_AUTO) | |
3177 | cc->device_policy = CGROUP_CLOSED; | |
3178 | } | |
f1660f96 | 3179 | |
cba6e062 | 3180 | return 0; |
e06c73cc LP |
3181 | } |
3182 | ||
3ef63c31 LP |
3183 | ExecContext *unit_get_exec_context(Unit *u) { |
3184 | size_t offset; | |
3185 | assert(u); | |
3186 | ||
598459ce LP |
3187 | if (u->type < 0) |
3188 | return NULL; | |
3189 | ||
3ef63c31 LP |
3190 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3191 | if (offset <= 0) | |
3192 | return NULL; | |
3193 | ||
3194 | return (ExecContext*) ((uint8_t*) u + offset); | |
3195 | } | |
3196 | ||
718db961 LP |
3197 | KillContext *unit_get_kill_context(Unit *u) { |
3198 | size_t offset; | |
3199 | assert(u); | |
3200 | ||
598459ce LP |
3201 | if (u->type < 0) |
3202 | return NULL; | |
3203 | ||
718db961 LP |
3204 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3205 | if (offset <= 0) | |
3206 | return NULL; | |
3207 | ||
3208 | return (KillContext*) ((uint8_t*) u + offset); | |
3209 | } | |
3210 | ||
4ad49000 LP |
3211 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3212 | size_t offset; | |
3213 | ||
598459ce LP |
3214 | if (u->type < 0) |
3215 | return NULL; | |
3216 | ||
4ad49000 LP |
3217 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3218 | if (offset <= 0) | |
3219 | return NULL; | |
3220 | ||
3221 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3222 | } | |
3223 | ||
613b411c LP |
3224 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3225 | size_t offset; | |
3226 | ||
598459ce LP |
3227 | if (u->type < 0) |
3228 | return NULL; | |
3229 | ||
613b411c LP |
3230 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3231 | if (offset <= 0) | |
3232 | return NULL; | |
3233 | ||
3234 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3235 | } | |
3236 | ||
29686440 | 3237 | static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) { |
26d04f86 | 3238 | if (u->manager->running_as == SYSTEMD_USER) { |
29686440 | 3239 | int r; |
26d04f86 | 3240 | |
718880ba SA |
3241 | if (mode == UNIT_PERSISTENT && !transient) |
3242 | r = user_config_home(dir); | |
3243 | else | |
4d5dec23 | 3244 | r = user_runtime_dir(dir); |
718880ba | 3245 | |
26d04f86 LP |
3246 | if (r == 0) |
3247 | return -ENOENT; | |
29686440 ZJS |
3248 | return r; |
3249 | } | |
26d04f86 | 3250 | |
29686440 ZJS |
3251 | if (mode == UNIT_PERSISTENT && !transient) |
3252 | *dir = strdup("/etc/systemd/system"); | |
8e2af478 | 3253 | else |
29686440 ZJS |
3254 | *dir = strdup("/run/systemd/system"); |
3255 | if (!*dir) | |
71645aca LP |
3256 | return -ENOMEM; |
3257 | ||
26d04f86 | 3258 | return 0; |
71645aca LP |
3259 | } |
3260 | ||
29686440 ZJS |
3261 | static int unit_drop_in_file(Unit *u, |
3262 | UnitSetPropertiesMode mode, const char *name, char **p, char **q) { | |
3263 | _cleanup_free_ char *dir = NULL; | |
3264 | int r; | |
3265 | ||
3266 | assert(u); | |
3267 | ||
3268 | r = unit_drop_in_dir(u, mode, u->transient, &dir); | |
3269 | if (r < 0) | |
3270 | return r; | |
3271 | ||
8eea8687 | 3272 | return drop_in_file(dir, u->id, 50, name, p, q); |
29686440 ZJS |
3273 | } |
3274 | ||
8e2af478 | 3275 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
29686440 | 3276 | |
adb76a70 | 3277 | _cleanup_free_ char *dir = NULL, *p = NULL, *q = NULL; |
26d04f86 | 3278 | int r; |
71645aca LP |
3279 | |
3280 | assert(u); | |
3281 | ||
6d235724 | 3282 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3283 | return 0; |
3284 | ||
29686440 | 3285 | r = unit_drop_in_dir(u, mode, u->transient, &dir); |
26d04f86 LP |
3286 | if (r < 0) |
3287 | return r; | |
71645aca | 3288 | |
adb76a70 WC |
3289 | r = write_drop_in(dir, u->id, 50, name, data); |
3290 | if (r < 0) | |
3291 | return r; | |
3292 | ||
3293 | r = drop_in_file(dir, u->id, 50, name, &p, &q); | |
3294 | if (r < 0) | |
3295 | return r; | |
3296 | ||
3297 | r = strv_extend(&u->dropin_paths, q); | |
3298 | if (r < 0) | |
3299 | return r; | |
3300 | ||
3301 | strv_sort(u->dropin_paths); | |
3302 | strv_uniq(u->dropin_paths); | |
3303 | ||
3304 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3305 | ||
3306 | return 0; | |
26d04f86 | 3307 | } |
71645aca | 3308 | |
b9ec9359 LP |
3309 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3310 | _cleanup_free_ char *p = NULL; | |
3311 | va_list ap; | |
3312 | int r; | |
3313 | ||
3314 | assert(u); | |
3315 | assert(name); | |
3316 | assert(format); | |
3317 | ||
6d235724 | 3318 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3319 | return 0; |
3320 | ||
3321 | va_start(ap, format); | |
3322 | r = vasprintf(&p, format, ap); | |
3323 | va_end(ap); | |
3324 | ||
3325 | if (r < 0) | |
3326 | return -ENOMEM; | |
3327 | ||
3328 | return unit_write_drop_in(u, mode, name, p); | |
3329 | } | |
3330 | ||
3331 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
3332 | _cleanup_free_ char *ndata = NULL; |
3333 | ||
3334 | assert(u); | |
3335 | assert(name); | |
3336 | assert(data); | |
3337 | ||
3338 | if (!UNIT_VTABLE(u)->private_section) | |
3339 | return -EINVAL; | |
3340 | ||
6d235724 | 3341 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3342 | return 0; |
3343 | ||
b42defe3 LP |
3344 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
3345 | if (!ndata) | |
3346 | return -ENOMEM; | |
3347 | ||
3348 | return unit_write_drop_in(u, mode, name, ndata); | |
3349 | } | |
3350 | ||
b9ec9359 LP |
3351 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3352 | _cleanup_free_ char *p = NULL; | |
3353 | va_list ap; | |
3354 | int r; | |
3355 | ||
3356 | assert(u); | |
3357 | assert(name); | |
3358 | assert(format); | |
3359 | ||
6d235724 | 3360 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3361 | return 0; |
3362 | ||
3363 | va_start(ap, format); | |
3364 | r = vasprintf(&p, format, ap); | |
3365 | va_end(ap); | |
3366 | ||
3367 | if (r < 0) | |
3368 | return -ENOMEM; | |
3369 | ||
3370 | return unit_write_drop_in_private(u, mode, name, p); | |
3371 | } | |
3372 | ||
8e2af478 | 3373 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
3374 | _cleanup_free_ char *p = NULL, *q = NULL; |
3375 | int r; | |
71645aca | 3376 | |
26d04f86 | 3377 | assert(u); |
71645aca | 3378 | |
6d235724 | 3379 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3380 | return 0; |
3381 | ||
29686440 | 3382 | r = unit_drop_in_file(u, mode, name, &p, &q); |
6891529f ZJS |
3383 | if (r < 0) |
3384 | return r; | |
3385 | ||
71645aca | 3386 | if (unlink(q) < 0) |
241da328 | 3387 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 3388 | else |
241da328 | 3389 | r = 1; |
71645aca LP |
3390 | |
3391 | rmdir(p); | |
26d04f86 | 3392 | return r; |
71645aca LP |
3393 | } |
3394 | ||
c2756a68 LP |
3395 | int unit_make_transient(Unit *u) { |
3396 | int r; | |
3397 | ||
3398 | assert(u); | |
3399 | ||
3400 | u->load_state = UNIT_STUB; | |
3401 | u->load_error = 0; | |
3402 | u->transient = true; | |
3403 | ||
3404 | free(u->fragment_path); | |
3405 | u->fragment_path = NULL; | |
3406 | ||
3407 | if (u->manager->running_as == SYSTEMD_USER) { | |
3408 | _cleanup_free_ char *c = NULL; | |
3409 | ||
4d5dec23 | 3410 | r = user_runtime_dir(&c); |
c2756a68 LP |
3411 | if (r < 0) |
3412 | return r; | |
3413 | if (r == 0) | |
3414 | return -ENOENT; | |
3415 | ||
3416 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
3417 | if (!u->fragment_path) | |
3418 | return -ENOMEM; | |
3419 | ||
3420 | mkdir_p(c, 0755); | |
3421 | } else { | |
3422 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
3423 | if (!u->fragment_path) | |
3424 | return -ENOMEM; | |
3425 | ||
3426 | mkdir_p("/run/systemd/system", 0755); | |
3427 | } | |
3428 | ||
3429 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
3430 | } | |
3431 | ||
cd2086fe LP |
3432 | int unit_kill_context( |
3433 | Unit *u, | |
3434 | KillContext *c, | |
db2cb23b | 3435 | KillOperation k, |
cd2086fe LP |
3436 | pid_t main_pid, |
3437 | pid_t control_pid, | |
3438 | bool main_pid_alien) { | |
3439 | ||
bc6aed7b | 3440 | int sig, wait_for_exit = false, r; |
cd2086fe LP |
3441 | |
3442 | assert(u); | |
3443 | assert(c); | |
3444 | ||
3445 | if (c->kill_mode == KILL_NONE) | |
3446 | return 0; | |
3447 | ||
db2cb23b UTL |
3448 | switch (k) { |
3449 | case KILL_KILL: | |
3450 | sig = SIGKILL; | |
3451 | break; | |
3452 | case KILL_ABORT: | |
3453 | sig = SIGABRT; | |
3454 | break; | |
3455 | case KILL_TERMINATE: | |
3456 | sig = c->kill_signal; | |
3457 | break; | |
3458 | default: | |
3459 | assert_not_reached("KillOperation unknown"); | |
3460 | } | |
cd2086fe LP |
3461 | |
3462 | if (main_pid > 0) { | |
3463 | r = kill_and_sigcont(main_pid, sig); | |
3464 | ||
3465 | if (r < 0 && r != -ESRCH) { | |
3466 | _cleanup_free_ char *comm = NULL; | |
3467 | get_process_comm(main_pid, &comm); | |
3468 | ||
31938a85 | 3469 | log_unit_warning_errno(u->id, r, "Failed to kill main process " PID_FMT " (%s): %m", main_pid, strna(comm)); |
82659fd7 | 3470 | } else { |
bc6aed7b LP |
3471 | if (!main_pid_alien) |
3472 | wait_for_exit = true; | |
82659fd7 | 3473 | |
db2cb23b | 3474 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3475 | kill(main_pid, SIGHUP); |
3476 | } | |
cd2086fe LP |
3477 | } |
3478 | ||
3479 | if (control_pid > 0) { | |
3480 | r = kill_and_sigcont(control_pid, sig); | |
3481 | ||
3482 | if (r < 0 && r != -ESRCH) { | |
3483 | _cleanup_free_ char *comm = NULL; | |
3484 | get_process_comm(control_pid, &comm); | |
3485 | ||
31938a85 | 3486 | log_unit_warning_errno(u->id, r, "Failed to kill control process " PID_FMT " (%s): %m", control_pid, strna(comm)); |
82659fd7 | 3487 | } else { |
cd2086fe | 3488 | wait_for_exit = true; |
82659fd7 | 3489 | |
db2cb23b | 3490 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3491 | kill(control_pid, SIGHUP); |
3492 | } | |
cd2086fe LP |
3493 | } |
3494 | ||
db2cb23b | 3495 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL)) && u->cgroup_path) { |
cd2086fe LP |
3496 | _cleanup_set_free_ Set *pid_set = NULL; |
3497 | ||
82659fd7 LP |
3498 | /* Exclude the main/control pids from being killed via the cgroup */ |
3499 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3500 | if (!pid_set) |
3501 | return -ENOMEM; | |
3502 | ||
4ad49000 | 3503 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
3504 | if (r < 0) { |
3505 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
31938a85 | 3506 | log_unit_warning_errno(u->id, r, "Failed to kill control group: %m"); |
82659fd7 | 3507 | } else if (r > 0) { |
bc6aed7b | 3508 | |
743970d2 LP |
3509 | /* FIXME: For now, we will not wait for the |
3510 | * cgroup members to die, simply because | |
3511 | * cgroup notification is unreliable. It | |
3512 | * doesn't work at all in containers, and | |
3513 | * outside of containers it can be confused | |
3514 | * easily by leaving directories in the | |
3515 | * cgroup. */ | |
3516 | ||
3517 | /* wait_for_exit = true; */ | |
58ea275a | 3518 | |
db2cb23b | 3519 | if (c->send_sighup && k != KILL_KILL) { |
82659fd7 LP |
3520 | set_free(pid_set); |
3521 | ||
3522 | pid_set = unit_pid_set(main_pid, control_pid); | |
3523 | if (!pid_set) | |
3524 | return -ENOMEM; | |
3525 | ||
8190da36 | 3526 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3527 | } |
3528 | } | |
cd2086fe LP |
3529 | } |
3530 | ||
3531 | return wait_for_exit; | |
3532 | } | |
3533 | ||
a57f7e2c LP |
3534 | int unit_require_mounts_for(Unit *u, const char *path) { |
3535 | char prefix[strlen(path) + 1], *p; | |
3536 | int r; | |
3537 | ||
3538 | assert(u); | |
3539 | assert(path); | |
3540 | ||
3541 | /* Registers a unit for requiring a certain path and all its | |
3542 | * prefixes. We keep a simple array of these paths in the | |
3543 | * unit, since its usually short. However, we build a prefix | |
3544 | * table for all possible prefixes so that new appearing mount | |
3545 | * units can easily determine which units to make themselves a | |
3546 | * dependency of. */ | |
3547 | ||
70b64bd3 ZJS |
3548 | if (!path_is_absolute(path)) |
3549 | return -EINVAL; | |
3550 | ||
a57f7e2c LP |
3551 | p = strdup(path); |
3552 | if (!p) | |
3553 | return -ENOMEM; | |
3554 | ||
3555 | path_kill_slashes(p); | |
3556 | ||
a57f7e2c LP |
3557 | if (!path_is_safe(p)) { |
3558 | free(p); | |
3559 | return -EPERM; | |
3560 | } | |
3561 | ||
3562 | if (strv_contains(u->requires_mounts_for, p)) { | |
3563 | free(p); | |
3564 | return 0; | |
3565 | } | |
3566 | ||
6e18964d ZJS |
3567 | r = strv_consume(&u->requires_mounts_for, p); |
3568 | if (r < 0) | |
a57f7e2c | 3569 | return r; |
a57f7e2c LP |
3570 | |
3571 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3572 | Set *x; | |
3573 | ||
3574 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3575 | if (!x) { | |
3576 | char *q; | |
3577 | ||
3578 | if (!u->manager->units_requiring_mounts_for) { | |
d5099efc | 3579 | u->manager->units_requiring_mounts_for = hashmap_new(&string_hash_ops); |
a57f7e2c LP |
3580 | if (!u->manager->units_requiring_mounts_for) |
3581 | return -ENOMEM; | |
3582 | } | |
3583 | ||
3584 | q = strdup(prefix); | |
3585 | if (!q) | |
3586 | return -ENOMEM; | |
3587 | ||
d5099efc | 3588 | x = set_new(NULL); |
a57f7e2c LP |
3589 | if (!x) { |
3590 | free(q); | |
3591 | return -ENOMEM; | |
3592 | } | |
3593 | ||
3594 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3595 | if (r < 0) { | |
3596 | free(q); | |
3597 | set_free(x); | |
3598 | return r; | |
3599 | } | |
3600 | } | |
3601 | ||
3602 | r = set_put(x, u); | |
3603 | if (r < 0) | |
3604 | return r; | |
3605 | } | |
3606 | ||
3607 | return 0; | |
3608 | } | |
3609 | ||
613b411c LP |
3610 | int unit_setup_exec_runtime(Unit *u) { |
3611 | ExecRuntime **rt; | |
3612 | size_t offset; | |
3613 | Iterator i; | |
3614 | Unit *other; | |
3615 | ||
3616 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3617 | assert(offset > 0); | |
3618 | ||
06b643e7 | 3619 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3620 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3621 | if (*rt) | |
3622 | return 0; | |
3623 | ||
3624 | /* Try to get it from somebody else */ | |
3625 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3626 | ||
3627 | *rt = unit_get_exec_runtime(other); | |
3628 | if (*rt) { | |
3629 | exec_runtime_ref(*rt); | |
3630 | return 0; | |
3631 | } | |
3632 | } | |
3633 | ||
3634 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3635 | } | |
3636 | ||
94f04347 LP |
3637 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3638 | [UNIT_ACTIVE] = "active", | |
032ff4af | 3639 | [UNIT_RELOADING] = "reloading", |
94f04347 | 3640 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 3641 | [UNIT_FAILED] = "failed", |
94f04347 LP |
3642 | [UNIT_ACTIVATING] = "activating", |
3643 | [UNIT_DEACTIVATING] = "deactivating" | |
3644 | }; | |
3645 | ||
3646 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); |