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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
87f0e418 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
87f0e418 LP |
22 | #include <assert.h> |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <sys/epoll.h> | |
26 | #include <sys/timerfd.h> | |
27 | #include <sys/poll.h> | |
0301abf4 LP |
28 | #include <stdlib.h> |
29 | #include <unistd.h> | |
45fb0699 | 30 | #include <sys/stat.h> |
87f0e418 | 31 | |
718db961 LP |
32 | #include "sd-id128.h" |
33 | #include "sd-messages.h" | |
87f0e418 LP |
34 | #include "set.h" |
35 | #include "unit.h" | |
36 | #include "macro.h" | |
37 | #include "strv.h" | |
9eb977db | 38 | #include "path-util.h" |
87f0e418 LP |
39 | #include "load-fragment.h" |
40 | #include "load-dropin.h" | |
41 | #include "log.h" | |
9e2f7c11 | 42 | #include "unit-name.h" |
4139c1b2 | 43 | #include "dbus-unit.h" |
514f4ef5 | 44 | #include "special.h" |
c6c18be3 | 45 | #include "cgroup-util.h" |
4927fcae | 46 | #include "missing.h" |
71645aca | 47 | #include "mkdir.h" |
a5c32cff HH |
48 | #include "label.h" |
49 | #include "fileio-label.h" | |
814cc562 | 50 | #include "bus-errors.h" |
718db961 | 51 | #include "dbus.h" |
613b411c | 52 | #include "execute.h" |
bc6aed7b | 53 | #include "virt.h" |
87f0e418 LP |
54 | |
55 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
56 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 57 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 58 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 | 59 | [UNIT_TARGET] = &target_vtable, |
e821075a | 60 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
87f0e418 LP |
61 | [UNIT_DEVICE] = &device_vtable, |
62 | [UNIT_MOUNT] = &mount_vtable, | |
63 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 64 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 65 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 66 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
67 | [UNIT_SLICE] = &slice_vtable, |
68 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
69 | }; |
70 | ||
7d17cfbc | 71 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
72 | Unit *u; |
73 | ||
74 | assert(m); | |
ac155bb8 | 75 | assert(size >= sizeof(Unit)); |
87f0e418 | 76 | |
7d17cfbc MS |
77 | u = malloc0(size); |
78 | if (!u) | |
87f0e418 LP |
79 | return NULL; |
80 | ||
ac155bb8 MS |
81 | u->names = set_new(string_hash_func, string_compare_func); |
82 | if (!u->names) { | |
87f0e418 LP |
83 | free(u); |
84 | return NULL; | |
85 | } | |
86 | ||
ac155bb8 MS |
87 | u->manager = m; |
88 | u->type = _UNIT_TYPE_INVALID; | |
89 | u->deserialized_job = _JOB_TYPE_INVALID; | |
90 | u->default_dependencies = true; | |
91 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d420282b | 92 | u->on_failure_job_mode = JOB_REPLACE; |
87f0e418 LP |
93 | |
94 | return u; | |
95 | } | |
96 | ||
f278026d LP |
97 | bool unit_has_name(Unit *u, const char *name) { |
98 | assert(u); | |
99 | assert(name); | |
100 | ||
ac155bb8 | 101 | return !!set_get(u->names, (char*) name); |
f278026d LP |
102 | } |
103 | ||
598459ce LP |
104 | static void unit_init(Unit *u) { |
105 | CGroupContext *cc; | |
106 | ExecContext *ec; | |
107 | KillContext *kc; | |
108 | ||
109 | assert(u); | |
110 | assert(u->manager); | |
111 | assert(u->type >= 0); | |
112 | ||
113 | cc = unit_get_cgroup_context(u); | |
114 | if (cc) { | |
115 | cgroup_context_init(cc); | |
116 | ||
117 | /* Copy in the manager defaults into the cgroup | |
118 | * context, _before_ the rest of the settings have | |
119 | * been initialized */ | |
120 | ||
121 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
122 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
123 | cc->memory_accounting = u->manager->default_memory_accounting; | |
b2f8b02e | 124 | cc->cpu_quota_period_usec = u->manager->default_cpu_quota_period_usec; |
598459ce LP |
125 | } |
126 | ||
127 | ec = unit_get_exec_context(u); | |
128 | if (ec) | |
129 | exec_context_init(ec); | |
130 | ||
131 | kc = unit_get_kill_context(u); | |
132 | if (kc) | |
133 | kill_context_init(kc); | |
134 | ||
135 | if (UNIT_VTABLE(u)->init) | |
136 | UNIT_VTABLE(u)->init(u); | |
137 | } | |
138 | ||
87f0e418 | 139 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 140 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 141 | UnitType t; |
87f0e418 LP |
142 | int r; |
143 | ||
144 | assert(u); | |
145 | assert(text); | |
146 | ||
9e2f7c11 | 147 | if (unit_name_is_template(text)) { |
598459ce | 148 | |
ac155bb8 | 149 | if (!u->instance) |
9e2f7c11 | 150 | return -EINVAL; |
87f0e418 | 151 | |
ac155bb8 | 152 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
153 | } else |
154 | s = strdup(text); | |
9e2f7c11 LP |
155 | if (!s) |
156 | return -ENOMEM; | |
87f0e418 | 157 | |
598459ce LP |
158 | if (!unit_name_is_valid(s, TEMPLATE_INVALID)) |
159 | return -EINVAL; | |
e537352b | 160 | |
9e2f7c11 | 161 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 162 | |
598459ce LP |
163 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
164 | return -EINVAL; | |
87f0e418 | 165 | |
e48614c4 ZJS |
166 | r = unit_name_to_instance(s, &i); |
167 | if (r < 0) | |
598459ce | 168 | return r; |
87f0e418 | 169 | |
598459ce LP |
170 | if (i && unit_vtable[t]->no_instances) |
171 | return -EINVAL; | |
9e2f7c11 | 172 | |
276c3e78 LP |
173 | /* Ensure that this unit is either instanced or not instanced, |
174 | * but not both. */ | |
598459ce LP |
175 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
176 | return -EINVAL; | |
9e2f7c11 LP |
177 | |
178 | if (unit_vtable[t]->no_alias && | |
ac155bb8 | 179 | !set_isempty(u->names) && |
598459ce LP |
180 | !set_get(u->names, s)) |
181 | return -EEXIST; | |
9e2f7c11 | 182 | |
598459ce LP |
183 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
184 | return -E2BIG; | |
4f0f902f | 185 | |
e48614c4 ZJS |
186 | r = set_put(u->names, s); |
187 | if (r < 0) { | |
9e2f7c11 | 188 | if (r == -EEXIST) |
598459ce LP |
189 | return 0; |
190 | ||
191 | return r; | |
87f0e418 LP |
192 | } |
193 | ||
e48614c4 ZJS |
194 | r = hashmap_put(u->manager->units, s, u); |
195 | if (r < 0) { | |
ac155bb8 | 196 | set_remove(u->names, s); |
598459ce | 197 | return r; |
87f0e418 LP |
198 | } |
199 | ||
ac155bb8 | 200 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
201 | u->type = t; |
202 | u->id = s; | |
203 | u->instance = i; | |
9e2f7c11 | 204 | |
71fda00f | 205 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 206 | |
598459ce | 207 | unit_init(u); |
87f0e418 | 208 | |
598459ce LP |
209 | i = NULL; |
210 | } | |
9e2f7c11 | 211 | |
598459ce | 212 | s = NULL; |
9e2f7c11 | 213 | |
598459ce LP |
214 | unit_add_to_dbus_queue(u); |
215 | return 0; | |
87f0e418 LP |
216 | } |
217 | ||
0ae97ec1 | 218 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 219 | _cleanup_free_ char *t = NULL; |
598459ce | 220 | char *s, *i; |
276c3e78 | 221 | int r; |
0ae97ec1 LP |
222 | |
223 | assert(u); | |
224 | assert(name); | |
225 | ||
9e2f7c11 LP |
226 | if (unit_name_is_template(name)) { |
227 | ||
ac155bb8 | 228 | if (!u->instance) |
9e2f7c11 LP |
229 | return -EINVAL; |
230 | ||
e48614c4 ZJS |
231 | t = unit_name_replace_instance(name, u->instance); |
232 | if (!t) | |
9e2f7c11 LP |
233 | return -ENOMEM; |
234 | ||
235 | name = t; | |
236 | } | |
237 | ||
0ae97ec1 | 238 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 239 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 240 | if (!s) |
0ae97ec1 LP |
241 | return -ENOENT; |
242 | ||
e48614c4 ZJS |
243 | r = unit_name_to_instance(s, &i); |
244 | if (r < 0) | |
276c3e78 LP |
245 | return r; |
246 | ||
ac155bb8 | 247 | u->id = s; |
276c3e78 | 248 | |
ac155bb8 MS |
249 | free(u->instance); |
250 | u->instance = i; | |
276c3e78 | 251 | |
c1e1601e | 252 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 253 | |
0ae97ec1 LP |
254 | return 0; |
255 | } | |
256 | ||
f50e0a01 LP |
257 | int unit_set_description(Unit *u, const char *description) { |
258 | char *s; | |
259 | ||
260 | assert(u); | |
261 | ||
8aec412f LP |
262 | if (isempty(description)) |
263 | s = NULL; | |
264 | else { | |
265 | s = strdup(description); | |
266 | if (!s) | |
267 | return -ENOMEM; | |
268 | } | |
f50e0a01 | 269 | |
ac155bb8 MS |
270 | free(u->description); |
271 | u->description = s; | |
c1e1601e LP |
272 | |
273 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
274 | return 0; |
275 | } | |
276 | ||
701cc384 LP |
277 | bool unit_check_gc(Unit *u) { |
278 | assert(u); | |
279 | ||
280 | if (UNIT_VTABLE(u)->no_gc) | |
281 | return true; | |
282 | ||
ac155bb8 | 283 | if (u->no_gc) |
6c073082 LP |
284 | return true; |
285 | ||
ac155bb8 | 286 | if (u->job) |
701cc384 LP |
287 | return true; |
288 | ||
e0209d83 MS |
289 | if (u->nop_job) |
290 | return true; | |
291 | ||
701cc384 LP |
292 | if (unit_active_state(u) != UNIT_INACTIVE) |
293 | return true; | |
294 | ||
9d576438 LP |
295 | if (u->refs) |
296 | return true; | |
297 | ||
701cc384 LP |
298 | if (UNIT_VTABLE(u)->check_gc) |
299 | if (UNIT_VTABLE(u)->check_gc(u)) | |
300 | return true; | |
301 | ||
302 | return false; | |
303 | } | |
304 | ||
87f0e418 LP |
305 | void unit_add_to_load_queue(Unit *u) { |
306 | assert(u); | |
ac155bb8 | 307 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 308 | |
ac155bb8 | 309 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
310 | return; |
311 | ||
71fda00f | 312 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 313 | u->in_load_queue = true; |
87f0e418 LP |
314 | } |
315 | ||
23a177ef LP |
316 | void unit_add_to_cleanup_queue(Unit *u) { |
317 | assert(u); | |
318 | ||
ac155bb8 | 319 | if (u->in_cleanup_queue) |
23a177ef LP |
320 | return; |
321 | ||
71fda00f | 322 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 323 | u->in_cleanup_queue = true; |
23a177ef LP |
324 | } |
325 | ||
701cc384 LP |
326 | void unit_add_to_gc_queue(Unit *u) { |
327 | assert(u); | |
328 | ||
ac155bb8 | 329 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
330 | return; |
331 | ||
332 | if (unit_check_gc(u)) | |
333 | return; | |
334 | ||
71fda00f | 335 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 336 | u->in_gc_queue = true; |
701cc384 | 337 | |
ac155bb8 | 338 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
339 | } |
340 | ||
c1e1601e LP |
341 | void unit_add_to_dbus_queue(Unit *u) { |
342 | assert(u); | |
ac155bb8 | 343 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 344 | |
ac155bb8 | 345 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
346 | return; |
347 | ||
a567261a | 348 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
349 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
350 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 351 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
352 | return; |
353 | } | |
354 | ||
71fda00f | 355 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 356 | u->in_dbus_queue = true; |
c1e1601e LP |
357 | } |
358 | ||
87f0e418 LP |
359 | static void bidi_set_free(Unit *u, Set *s) { |
360 | Iterator i; | |
361 | Unit *other; | |
362 | ||
363 | assert(u); | |
364 | ||
365 | /* Frees the set and makes sure we are dropped from the | |
366 | * inverse pointers */ | |
367 | ||
368 | SET_FOREACH(other, s, i) { | |
369 | UnitDependency d; | |
370 | ||
371 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 372 | set_remove(other->dependencies[d], u); |
701cc384 LP |
373 | |
374 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
375 | } |
376 | ||
377 | set_free(s); | |
378 | } | |
379 | ||
c2756a68 LP |
380 | static void unit_remove_transient(Unit *u) { |
381 | char **i; | |
382 | ||
383 | assert(u); | |
384 | ||
385 | if (!u->transient) | |
386 | return; | |
387 | ||
388 | if (u->fragment_path) | |
389 | unlink(u->fragment_path); | |
390 | ||
391 | STRV_FOREACH(i, u->dropin_paths) { | |
392 | _cleanup_free_ char *p = NULL; | |
393 | int r; | |
394 | ||
395 | unlink(*i); | |
396 | ||
397 | r = path_get_parent(*i, &p); | |
398 | if (r >= 0) | |
399 | rmdir(p); | |
400 | } | |
401 | } | |
402 | ||
a57f7e2c LP |
403 | static void unit_free_requires_mounts_for(Unit *u) { |
404 | char **j; | |
405 | ||
406 | STRV_FOREACH(j, u->requires_mounts_for) { | |
407 | char s[strlen(*j) + 1]; | |
408 | ||
409 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
410 | char *y; | |
411 | Set *x; | |
412 | ||
413 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
414 | if (!x) | |
415 | continue; | |
416 | ||
417 | set_remove(x, u); | |
418 | ||
419 | if (set_isempty(x)) { | |
420 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
421 | free(y); | |
422 | set_free(x); | |
423 | } | |
424 | } | |
425 | } | |
426 | ||
427 | strv_free(u->requires_mounts_for); | |
428 | u->requires_mounts_for = NULL; | |
429 | } | |
430 | ||
598459ce LP |
431 | static void unit_done(Unit *u) { |
432 | ExecContext *ec; | |
433 | CGroupContext *cc; | |
434 | ||
435 | assert(u); | |
436 | ||
437 | if (u->type < 0) | |
438 | return; | |
439 | ||
440 | if (UNIT_VTABLE(u)->done) | |
441 | UNIT_VTABLE(u)->done(u); | |
442 | ||
443 | ec = unit_get_exec_context(u); | |
444 | if (ec) | |
445 | exec_context_done(ec); | |
446 | ||
447 | cc = unit_get_cgroup_context(u); | |
448 | if (cc) | |
449 | cgroup_context_done(cc); | |
450 | } | |
451 | ||
87f0e418 LP |
452 | void unit_free(Unit *u) { |
453 | UnitDependency d; | |
454 | Iterator i; | |
455 | char *t; | |
456 | ||
457 | assert(u); | |
458 | ||
c2756a68 LP |
459 | if (u->manager->n_reloading <= 0) |
460 | unit_remove_transient(u); | |
461 | ||
c1e1601e LP |
462 | bus_unit_send_removed_signal(u); |
463 | ||
598459ce | 464 | unit_done(u); |
a013b84b | 465 | |
a57f7e2c LP |
466 | unit_free_requires_mounts_for(u); |
467 | ||
ac155bb8 MS |
468 | SET_FOREACH(t, u->names, i) |
469 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 470 | |
97e7d748 MS |
471 | if (u->job) { |
472 | Job *j = u->job; | |
473 | job_uninstall(j); | |
474 | job_free(j); | |
475 | } | |
964e0949 | 476 | |
e0209d83 MS |
477 | if (u->nop_job) { |
478 | Job *j = u->nop_job; | |
479 | job_uninstall(j); | |
480 | job_free(j); | |
481 | } | |
482 | ||
964e0949 | 483 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 484 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 485 | |
ac155bb8 | 486 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 487 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 488 | |
ac155bb8 | 489 | if (u->in_load_queue) |
71fda00f | 490 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 491 | |
ac155bb8 | 492 | if (u->in_dbus_queue) |
71fda00f | 493 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 494 | |
ac155bb8 | 495 | if (u->in_cleanup_queue) |
71fda00f | 496 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 497 | |
ac155bb8 | 498 | if (u->in_gc_queue) { |
71fda00f | 499 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 500 | u->manager->n_in_gc_queue--; |
701cc384 LP |
501 | } |
502 | ||
4ad49000 | 503 | if (u->in_cgroup_queue) |
71fda00f | 504 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 505 | |
72673e86 LP |
506 | if (u->cgroup_path) { |
507 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
508 | free(u->cgroup_path); | |
509 | } | |
510 | ||
f755e3b7 LP |
511 | set_remove(u->manager->failed_units, u); |
512 | ||
ac155bb8 | 513 | free(u->description); |
49dbfa7b | 514 | strv_free(u->documentation); |
ac155bb8 | 515 | free(u->fragment_path); |
1b64d026 | 516 | free(u->source_path); |
ae7a7182 | 517 | strv_free(u->dropin_paths); |
ac155bb8 | 518 | free(u->instance); |
87f0e418 | 519 | |
ac155bb8 | 520 | set_free_free(u->names); |
87f0e418 | 521 | |
a911bb9a LP |
522 | unit_unwatch_all_pids(u); |
523 | ||
ac155bb8 | 524 | condition_free_list(u->conditions); |
52661efd | 525 | |
702a2d8f LP |
526 | unit_ref_unset(&u->slice); |
527 | ||
ac155bb8 MS |
528 | while (u->refs) |
529 | unit_ref_unset(u->refs); | |
57020a3a | 530 | |
87f0e418 LP |
531 | free(u); |
532 | } | |
533 | ||
534 | UnitActiveState unit_active_state(Unit *u) { | |
535 | assert(u); | |
536 | ||
ac155bb8 | 537 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
538 | return unit_active_state(unit_follow_merge(u)); |
539 | ||
540 | /* After a reload it might happen that a unit is not correctly | |
541 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 542 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
543 | |
544 | return UNIT_VTABLE(u)->active_state(u); | |
545 | } | |
546 | ||
10a94420 LP |
547 | const char* unit_sub_state_to_string(Unit *u) { |
548 | assert(u); | |
549 | ||
550 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
551 | } | |
552 | ||
23a177ef LP |
553 | static void complete_move(Set **s, Set **other) { |
554 | assert(s); | |
555 | assert(other); | |
87f0e418 | 556 | |
23a177ef LP |
557 | if (!*other) |
558 | return; | |
87f0e418 LP |
559 | |
560 | if (*s) | |
23a177ef LP |
561 | set_move(*s, *other); |
562 | else { | |
563 | *s = *other; | |
564 | *other = NULL; | |
565 | } | |
566 | } | |
87f0e418 | 567 | |
23a177ef LP |
568 | static void merge_names(Unit *u, Unit *other) { |
569 | char *t; | |
570 | Iterator i; | |
87f0e418 | 571 | |
23a177ef LP |
572 | assert(u); |
573 | assert(other); | |
574 | ||
ac155bb8 | 575 | complete_move(&u->names, &other->names); |
23a177ef | 576 | |
ac155bb8 MS |
577 | set_free_free(other->names); |
578 | other->names = NULL; | |
579 | other->id = NULL; | |
23a177ef | 580 | |
ac155bb8 MS |
581 | SET_FOREACH(t, u->names, i) |
582 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
87f0e418 LP |
583 | } |
584 | ||
23a177ef LP |
585 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
586 | Iterator i; | |
587 | Unit *back; | |
87f0e418 | 588 | int r; |
23a177ef LP |
589 | |
590 | assert(u); | |
591 | assert(other); | |
592 | assert(d < _UNIT_DEPENDENCY_MAX); | |
593 | ||
83a95334 | 594 | /* Fix backwards pointers */ |
ac155bb8 | 595 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
596 | UnitDependency k; |
597 | ||
e48614c4 ZJS |
598 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
599 | r = set_remove_and_put(back->dependencies[k], other, u); | |
600 | if (r == -EEXIST) | |
601 | set_remove(back->dependencies[k], other); | |
602 | else | |
603 | assert(r >= 0 || r == -ENOENT); | |
604 | } | |
23a177ef LP |
605 | } |
606 | ||
ac155bb8 | 607 | complete_move(&u->dependencies[d], &other->dependencies[d]); |
23a177ef | 608 | |
ac155bb8 MS |
609 | set_free(other->dependencies[d]); |
610 | other->dependencies[d] = NULL; | |
23a177ef LP |
611 | } |
612 | ||
613 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
614 | UnitDependency d; |
615 | ||
616 | assert(u); | |
617 | assert(other); | |
ac155bb8 MS |
618 | assert(u->manager == other->manager); |
619 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 620 | |
cc916967 LP |
621 | other = unit_follow_merge(other); |
622 | ||
23a177ef LP |
623 | if (other == u) |
624 | return 0; | |
625 | ||
ac155bb8 | 626 | if (u->type != other->type) |
9e2f7c11 LP |
627 | return -EINVAL; |
628 | ||
ac155bb8 | 629 | if (!u->instance != !other->instance) |
87f0e418 LP |
630 | return -EINVAL; |
631 | ||
ac155bb8 | 632 | if (other->load_state != UNIT_STUB && |
c2756a68 | 633 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 634 | return -EEXIST; |
87f0e418 | 635 | |
ac155bb8 | 636 | if (other->job) |
819e213f LP |
637 | return -EEXIST; |
638 | ||
e0209d83 MS |
639 | if (other->nop_job) |
640 | return -EEXIST; | |
641 | ||
fdf20a31 | 642 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
643 | return -EEXIST; |
644 | ||
87f0e418 | 645 | /* Merge names */ |
23a177ef | 646 | merge_names(u, other); |
87f0e418 | 647 | |
57020a3a | 648 | /* Redirect all references */ |
ac155bb8 MS |
649 | while (other->refs) |
650 | unit_ref_set(other->refs, u); | |
57020a3a | 651 | |
87f0e418 LP |
652 | /* Merge dependencies */ |
653 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 654 | merge_dependencies(u, other, d); |
87f0e418 | 655 | |
ac155bb8 MS |
656 | other->load_state = UNIT_MERGED; |
657 | other->merged_into = u; | |
23a177ef | 658 | |
3616a49c LP |
659 | /* If there is still some data attached to the other node, we |
660 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 661 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
662 | if (UNIT_VTABLE(other)->done) |
663 | UNIT_VTABLE(other)->done(other); | |
664 | ||
665 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
666 | unit_add_to_cleanup_queue(other); |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
671 | int unit_merge_by_name(Unit *u, const char *name) { | |
672 | Unit *other; | |
9e2f7c11 | 673 | int r; |
68eda4bd | 674 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
675 | |
676 | assert(u); | |
677 | assert(name); | |
678 | ||
9e2f7c11 | 679 | if (unit_name_is_template(name)) { |
ac155bb8 | 680 | if (!u->instance) |
9e2f7c11 LP |
681 | return -EINVAL; |
682 | ||
e48614c4 ZJS |
683 | s = unit_name_replace_instance(name, u->instance); |
684 | if (!s) | |
9e2f7c11 LP |
685 | return -ENOMEM; |
686 | ||
687 | name = s; | |
688 | } | |
689 | ||
c2756a68 LP |
690 | other = manager_get_unit(u->manager, name); |
691 | if (!other) | |
9e2f7c11 LP |
692 | r = unit_add_name(u, name); |
693 | else | |
694 | r = unit_merge(u, other); | |
23a177ef | 695 | |
9e2f7c11 | 696 | return r; |
23a177ef LP |
697 | } |
698 | ||
699 | Unit* unit_follow_merge(Unit *u) { | |
700 | assert(u); | |
701 | ||
ac155bb8 MS |
702 | while (u->load_state == UNIT_MERGED) |
703 | assert_se(u = u->merged_into); | |
23a177ef LP |
704 | |
705 | return u; | |
706 | } | |
707 | ||
708 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
709 | int r; | |
710 | ||
711 | assert(u); | |
712 | assert(c); | |
713 | ||
36be24c8 ZJS |
714 | if (c->working_directory) { |
715 | r = unit_require_mounts_for(u, c->working_directory); | |
716 | if (r < 0) | |
717 | return r; | |
718 | } | |
719 | ||
720 | if (c->root_directory) { | |
721 | r = unit_require_mounts_for(u, c->root_directory); | |
722 | if (r < 0) | |
723 | return r; | |
724 | } | |
725 | ||
b46a529c LP |
726 | if (u->manager->running_as != SYSTEMD_SYSTEM) |
727 | return 0; | |
728 | ||
729 | if (c->private_tmp) { | |
730 | r = unit_require_mounts_for(u, "/tmp"); | |
731 | if (r < 0) | |
732 | return r; | |
733 | ||
734 | r = unit_require_mounts_for(u, "/var/tmp"); | |
735 | if (r < 0) | |
736 | return r; | |
737 | } | |
738 | ||
ecc6e2b8 LP |
739 | if (c->std_output != EXEC_OUTPUT_KMSG && |
740 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 741 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
742 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
743 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 744 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 745 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 746 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 747 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 748 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 749 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 750 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
751 | return 0; |
752 | ||
753 | /* If syslog or kernel logging is requested, make sure our own | |
754 | * logging daemon is run first. */ | |
755 | ||
b46a529c LP |
756 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
757 | if (r < 0) | |
758 | return r; | |
23a177ef | 759 | |
87f0e418 LP |
760 | return 0; |
761 | } | |
762 | ||
87f0e418 LP |
763 | const char *unit_description(Unit *u) { |
764 | assert(u); | |
765 | ||
ac155bb8 MS |
766 | if (u->description) |
767 | return u->description; | |
87f0e418 | 768 | |
ac155bb8 | 769 | return strna(u->id); |
87f0e418 LP |
770 | } |
771 | ||
772 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 773 | char *t, **j; |
87f0e418 LP |
774 | UnitDependency d; |
775 | Iterator i; | |
68eda4bd | 776 | _cleanup_free_ char *p2 = NULL; |
47be870b | 777 | const char *prefix2; |
173e3821 LP |
778 | char |
779 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
780 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
781 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
782 | timestamp4[FORMAT_TIMESTAMP_MAX], |
783 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 784 | Unit *following; |
eeaedb7c LP |
785 | _cleanup_set_free_ Set *following_set = NULL; |
786 | int r; | |
87f0e418 LP |
787 | |
788 | assert(u); | |
ac155bb8 | 789 | assert(u->type >= 0); |
87f0e418 LP |
790 | |
791 | if (!prefix) | |
792 | prefix = ""; | |
47be870b LP |
793 | p2 = strappend(prefix, "\t"); |
794 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
795 | |
796 | fprintf(f, | |
40d50879 | 797 | "%s-> Unit %s:\n" |
87f0e418 | 798 | "%s\tDescription: %s\n" |
9e2f7c11 | 799 | "%s\tInstance: %s\n" |
87f0e418 | 800 | "%s\tUnit Load State: %s\n" |
2fad8195 | 801 | "%s\tUnit Active State: %s\n" |
173e3821 | 802 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 803 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 804 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 805 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 806 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 807 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 808 | "%s\tTransient: %s\n" |
4ad49000 LP |
809 | "%s\tSlice: %s\n" |
810 | "%s\tCGroup: %s\n" | |
811 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
812 | "%s\tCGroup mask: 0x%x\n" |
813 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 814 | prefix, u->id, |
87f0e418 | 815 | prefix, unit_description(u), |
ac155bb8 MS |
816 | prefix, strna(u->instance), |
817 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 818 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
819 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
820 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
821 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
822 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 823 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 824 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 825 | prefix, yes_no(u->transient), |
4ad49000 LP |
826 | prefix, strna(unit_slice_name(u)), |
827 | prefix, strna(u->cgroup_path), | |
828 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 829 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 830 | prefix, u->cgroup_members_mask); |
0301abf4 | 831 | |
ac155bb8 | 832 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
833 | fprintf(f, "%s\tName: %s\n", prefix, t); |
834 | ||
49dbfa7b LP |
835 | STRV_FOREACH(j, u->documentation) |
836 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
837 | ||
eeaedb7c LP |
838 | following = unit_following(u); |
839 | if (following) | |
ac155bb8 | 840 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 841 | |
eeaedb7c LP |
842 | r = unit_following_set(u, &following_set); |
843 | if (r >= 0) { | |
844 | Unit *other; | |
845 | ||
846 | SET_FOREACH(other, following_set, i) | |
847 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
848 | } | |
849 | ||
ac155bb8 MS |
850 | if (u->fragment_path) |
851 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 852 | |
1b64d026 LP |
853 | if (u->source_path) |
854 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
855 | ||
ae7a7182 | 856 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 857 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 858 | |
ac155bb8 | 859 | if (u->job_timeout > 0) |
2fa4092c | 860 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 861 | |
ac155bb8 | 862 | condition_dump_list(u->conditions, f, prefix); |
52661efd | 863 | |
ac155bb8 | 864 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
865 | fprintf(f, |
866 | "%s\tCondition Timestamp: %s\n" | |
867 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
868 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
869 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 870 | |
87f0e418 LP |
871 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
872 | Unit *other; | |
873 | ||
ac155bb8 MS |
874 | SET_FOREACH(other, u->dependencies[d], i) |
875 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
876 | } |
877 | ||
7c8fa05c | 878 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
879 | fprintf(f, |
880 | "%s\tRequiresMountsFor:", prefix); | |
881 | ||
882 | STRV_FOREACH(j, u->requires_mounts_for) | |
883 | fprintf(f, " %s", *j); | |
884 | ||
885 | fputs("\n", f); | |
886 | } | |
887 | ||
ac155bb8 | 888 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 889 | |
b0650475 | 890 | fprintf(f, |
a40eb732 | 891 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
892 | "%s\tRefuseManualStart: %s\n" |
893 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 894 | "%s\tDefaultDependencies: %s\n" |
d420282b | 895 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
896 | "%s\tIgnoreOnIsolate: %s\n" |
897 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
898 | prefix, yes_no(u->stop_when_unneeded), |
899 | prefix, yes_no(u->refuse_manual_start), | |
900 | prefix, yes_no(u->refuse_manual_stop), | |
901 | prefix, yes_no(u->default_dependencies), | |
d420282b | 902 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
903 | prefix, yes_no(u->ignore_on_isolate), |
904 | prefix, yes_no(u->ignore_on_snapshot)); | |
905 | ||
23a177ef LP |
906 | if (UNIT_VTABLE(u)->dump) |
907 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 908 | |
ac155bb8 | 909 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
910 | fprintf(f, |
911 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
912 | prefix, u->merged_into->id); |
913 | else if (u->load_state == UNIT_ERROR) | |
914 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 915 | |
87f0e418 | 916 | |
ac155bb8 MS |
917 | if (u->job) |
918 | job_dump(u->job, f, prefix2); | |
87f0e418 | 919 | |
e0209d83 MS |
920 | if (u->nop_job) |
921 | job_dump(u->nop_job, f, prefix2); | |
922 | ||
87f0e418 LP |
923 | } |
924 | ||
925 | /* Common implementation for multiple backends */ | |
e537352b | 926 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
927 | int r; |
928 | ||
929 | assert(u); | |
23a177ef | 930 | |
e48614c4 | 931 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
932 | r = unit_load_fragment(u); |
933 | if (r < 0) | |
23a177ef LP |
934 | return r; |
935 | ||
ac155bb8 | 936 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
937 | return -ENOENT; |
938 | ||
939 | /* Load drop-in directory data */ | |
4ad49000 LP |
940 | r = unit_load_dropin(unit_follow_merge(u)); |
941 | if (r < 0) | |
23a177ef LP |
942 | return r; |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | /* Common implementation for multiple backends */ | |
e537352b | 948 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 949 | int r; |
87f0e418 LP |
950 | |
951 | assert(u); | |
952 | ||
23a177ef LP |
953 | /* Same as unit_load_fragment_and_dropin(), but whether |
954 | * something can be loaded or not doesn't matter. */ | |
955 | ||
956 | /* Load a .service file */ | |
4ad49000 LP |
957 | r = unit_load_fragment(u); |
958 | if (r < 0) | |
87f0e418 LP |
959 | return r; |
960 | ||
ac155bb8 MS |
961 | if (u->load_state == UNIT_STUB) |
962 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 963 | |
87f0e418 | 964 | /* Load drop-in directory data */ |
4ad49000 LP |
965 | r = unit_load_dropin(unit_follow_merge(u)); |
966 | if (r < 0) | |
87f0e418 LP |
967 | return r; |
968 | ||
23a177ef | 969 | return 0; |
87f0e418 LP |
970 | } |
971 | ||
bba34eed | 972 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
973 | assert(u); |
974 | assert(target); | |
975 | ||
ac155bb8 | 976 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
977 | return 0; |
978 | ||
35b8ca3a | 979 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 980 | * that loop check below is reliable */ |
ac155bb8 MS |
981 | if (u->load_state != UNIT_LOADED || |
982 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
983 | return 0; |
984 | ||
21256a2b LP |
985 | /* If either side wants no automatic dependencies, then let's |
986 | * skip this */ | |
ac155bb8 MS |
987 | if (!u->default_dependencies || |
988 | !target->default_dependencies) | |
21256a2b LP |
989 | return 0; |
990 | ||
98bc2000 | 991 | /* Don't create loops */ |
ac155bb8 | 992 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
993 | return 0; |
994 | ||
995 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
996 | } | |
997 | ||
e954c9cf | 998 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 999 | |
21256a2b LP |
1000 | static const UnitDependency deps[] = { |
1001 | UNIT_REQUIRED_BY, | |
1002 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
1003 | UNIT_WANTED_BY, | |
1004 | UNIT_BOUND_BY | |
1005 | }; | |
1006 | ||
bba34eed | 1007 | Unit *target; |
98bc2000 | 1008 | Iterator i; |
21256a2b | 1009 | unsigned k; |
db57f3c6 | 1010 | int r = 0; |
98bc2000 LP |
1011 | |
1012 | assert(u); | |
1013 | ||
21256a2b | 1014 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1015 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1016 | r = unit_add_default_target_dependency(u, target); | |
1017 | if (r < 0) | |
21256a2b | 1018 | return r; |
a016b922 LP |
1019 | } |
1020 | ||
e954c9cf LP |
1021 | return r; |
1022 | } | |
4ad49000 | 1023 | |
e954c9cf LP |
1024 | static int unit_add_slice_dependencies(Unit *u) { |
1025 | assert(u); | |
b81884e7 | 1026 | |
e954c9cf LP |
1027 | if (!unit_get_cgroup_context(u)) |
1028 | return 0; | |
1029 | ||
1030 | if (UNIT_ISSET(u->slice)) | |
1031 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
1032 | ||
1033 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); | |
98bc2000 LP |
1034 | } |
1035 | ||
e954c9cf | 1036 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1037 | char **i; |
1038 | int r; | |
1039 | ||
1040 | assert(u); | |
1041 | ||
1042 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1043 | char prefix[strlen(*i) + 1]; | |
1044 | ||
1045 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
1046 | Unit *m; | |
1047 | ||
1048 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
1049 | if (r < 0) | |
1050 | return r; | |
1051 | if (r == 0) | |
1052 | continue; | |
1053 | if (m == u) | |
1054 | continue; | |
1055 | ||
1056 | if (m->load_state != UNIT_LOADED) | |
1057 | continue; | |
1058 | ||
1059 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1060 | if (r < 0) | |
1061 | return r; | |
1062 | ||
1063 | if (m->fragment_path) { | |
1064 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1065 | if (r < 0) | |
1066 | return r; | |
1067 | } | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
87f0e418 LP |
1074 | int unit_load(Unit *u) { |
1075 | int r; | |
1076 | ||
1077 | assert(u); | |
1078 | ||
ac155bb8 | 1079 | if (u->in_load_queue) { |
71fda00f | 1080 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1081 | u->in_load_queue = false; |
87f0e418 LP |
1082 | } |
1083 | ||
ac155bb8 | 1084 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1085 | return -EINVAL; |
1086 | ||
ac155bb8 | 1087 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1088 | return 0; |
1089 | ||
c2756a68 LP |
1090 | if (UNIT_VTABLE(u)->load) { |
1091 | r = UNIT_VTABLE(u)->load(u); | |
1092 | if (r < 0) | |
87f0e418 | 1093 | goto fail; |
c2756a68 | 1094 | } |
23a177ef | 1095 | |
ac155bb8 | 1096 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1097 | r = -ENOENT; |
1098 | goto fail; | |
1099 | } | |
1100 | ||
7c8fa05c | 1101 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1102 | |
e954c9cf LP |
1103 | r = unit_add_target_dependencies(u); |
1104 | if (r < 0) | |
1105 | goto fail; | |
1106 | ||
1107 | r = unit_add_slice_dependencies(u); | |
1108 | if (r < 0) | |
1109 | goto fail; | |
c2756a68 | 1110 | |
e954c9cf | 1111 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1112 | if (r < 0) |
c2756a68 | 1113 | goto fail; |
7c8fa05c | 1114 | |
bc432dc7 LP |
1115 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
1116 | log_error_unit(u->id, "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id); | |
c2756a68 LP |
1117 | r = -EINVAL; |
1118 | goto fail; | |
1119 | } | |
bc432dc7 LP |
1120 | |
1121 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1122 | } |
1123 | ||
ac155bb8 | 1124 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1125 | |
1126 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1127 | unit_add_to_gc_queue(u); |
87f0e418 | 1128 | |
87f0e418 LP |
1129 | return 0; |
1130 | ||
1131 | fail: | |
c2756a68 | 1132 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1133 | u->load_error = r; |
c1e1601e | 1134 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1135 | unit_add_to_gc_queue(u); |
23a177ef | 1136 | |
c1b6628d ZJS |
1137 | log_debug_unit(u->id, "Failed to load configuration for %s: %s", |
1138 | u->id, strerror(-r)); | |
23a177ef | 1139 | |
87f0e418 LP |
1140 | return r; |
1141 | } | |
1142 | ||
9588bc32 | 1143 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1144 | assert(u); |
1145 | ||
ac155bb8 | 1146 | dual_timestamp_get(&u->condition_timestamp); |
4b744dfa | 1147 | u->condition_result = condition_test_list(u->id, u->conditions); |
90bbc946 | 1148 | |
ac155bb8 | 1149 | return u->condition_result; |
90bbc946 LP |
1150 | } |
1151 | ||
44a6b1b6 | 1152 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 1153 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1154 | |
1155 | assert(u); | |
1156 | assert(t >= 0); | |
1157 | assert(t < _JOB_TYPE_MAX); | |
1158 | ||
1159 | if (t != JOB_START && t != JOB_STOP) | |
1160 | return NULL; | |
c6918296 MS |
1161 | |
1162 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1163 | if (!format_table) | |
877d54e9 LP |
1164 | return NULL; |
1165 | ||
1166 | return format_table->starting_stopping[t == JOB_STOP]; | |
1167 | } | |
1168 | ||
44a6b1b6 | 1169 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { |
877d54e9 LP |
1170 | const char *format; |
1171 | ||
1172 | assert(u); | |
1173 | assert(t >= 0); | |
1174 | assert(t < _JOB_TYPE_MAX); | |
1175 | ||
1176 | format = unit_get_status_message_format(u, t); | |
1177 | if (format) | |
1178 | return format; | |
1179 | ||
1180 | /* Return generic strings */ | |
1181 | if (t == JOB_START) | |
1182 | return "Starting %s."; | |
1183 | else if (t == JOB_STOP) | |
1184 | return "Stopping %s."; | |
1185 | else if (t == JOB_RELOAD) | |
1186 | return "Reloading %s."; | |
1187 | ||
1188 | return NULL; | |
1189 | } | |
1190 | ||
1191 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1192 | const char *format; | |
1193 | ||
1194 | assert(u); | |
1195 | ||
1196 | /* We only print status messages for selected units on | |
1197 | * selected operations. */ | |
c6918296 | 1198 | |
877d54e9 | 1199 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
1200 | if (!format) |
1201 | return; | |
1202 | ||
bcfce235 | 1203 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1204 | unit_status_printf(u, "", format); |
bcfce235 | 1205 | REENABLE_WARNING; |
c6918296 MS |
1206 | } |
1207 | ||
877d54e9 LP |
1208 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1209 | const char *format; | |
1210 | char buf[LINE_MAX]; | |
1211 | sd_id128_t mid; | |
1212 | ||
1213 | assert(u); | |
1214 | ||
1215 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1216 | return; | |
1217 | ||
81270860 LP |
1218 | if (log_on_console()) |
1219 | return; | |
1220 | ||
877d54e9 LP |
1221 | /* We log status messages for all units and all operations. */ |
1222 | ||
1223 | format = unit_get_status_message_format_try_harder(u, t); | |
1224 | if (!format) | |
1225 | return; | |
1226 | ||
bcfce235 | 1227 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 LP |
1228 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
1229 | char_array_0(buf); | |
bcfce235 | 1230 | REENABLE_WARNING; |
877d54e9 LP |
1231 | |
1232 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1233 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1234 | SD_MESSAGE_UNIT_RELOADING; | |
1235 | ||
bbc9006e | 1236 | log_struct_unit(LOG_INFO, |
c1b6628d ZJS |
1237 | u->id, |
1238 | MESSAGE_ID(mid), | |
1239 | "MESSAGE=%s", buf, | |
1240 | NULL); | |
877d54e9 | 1241 | } |
877d54e9 | 1242 | |
87f0e418 | 1243 | /* Errors: |
d5159713 LP |
1244 | * -EBADR: This unit type does not support starting. |
1245 | * -EALREADY: Unit is already started. | |
1246 | * -EAGAIN: An operation is already in progress. Retry later. | |
1247 | * -ECANCELED: Too many requests for now. | |
87f0e418 LP |
1248 | */ |
1249 | int unit_start(Unit *u) { | |
1250 | UnitActiveState state; | |
92ab323c | 1251 | Unit *following; |
87f0e418 LP |
1252 | |
1253 | assert(u); | |
1254 | ||
ac155bb8 | 1255 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1256 | return -EINVAL; |
1257 | ||
a82e5507 LP |
1258 | /* If this is already started, then this will succeed. Note |
1259 | * that this will even succeed if this unit is not startable | |
1260 | * by the user. This is relied on to detect when we need to | |
1261 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1262 | state = unit_active_state(u); |
1263 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1264 | return -EALREADY; | |
1265 | ||
a82e5507 LP |
1266 | /* If the conditions failed, don't do anything at all. If we |
1267 | * already are activating this call might still be useful to | |
1268 | * speed up activation in case there is some hold-off time, | |
1269 | * but we don't want to recheck the condition in that case. */ | |
1270 | if (state != UNIT_ACTIVATING && | |
1271 | !unit_condition_test(u)) { | |
c1b6628d | 1272 | log_debug_unit(u->id, "Starting of %s requested but condition failed. Ignoring.", u->id); |
52661efd LP |
1273 | return -EALREADY; |
1274 | } | |
1275 | ||
92ab323c | 1276 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1277 | following = unit_following(u); |
1278 | if (following) { | |
c1b6628d ZJS |
1279 | log_debug_unit(u->id, "Redirecting start request from %s to %s.", |
1280 | u->id, following->id); | |
92ab323c LP |
1281 | return unit_start(following); |
1282 | } | |
1283 | ||
877d54e9 LP |
1284 | unit_status_log_starting_stopping_reloading(u, JOB_START); |
1285 | unit_status_print_starting_stopping(u, JOB_START); | |
c6918296 | 1286 | |
92ab323c LP |
1287 | /* If it is stopped, but we cannot start it, then fail */ |
1288 | if (!UNIT_VTABLE(u)->start) | |
1289 | return -EBADR; | |
1290 | ||
87f0e418 LP |
1291 | /* We don't suppress calls to ->start() here when we are |
1292 | * already starting, to allow this request to be used as a | |
1293 | * "hurry up" call, for example when the unit is in some "auto | |
1294 | * restart" state where it waits for a holdoff timer to elapse | |
1295 | * before it will start again. */ | |
1296 | ||
c1e1601e | 1297 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1298 | |
87f0e418 LP |
1299 | return UNIT_VTABLE(u)->start(u); |
1300 | } | |
1301 | ||
1302 | bool unit_can_start(Unit *u) { | |
1303 | assert(u); | |
1304 | ||
1305 | return !!UNIT_VTABLE(u)->start; | |
1306 | } | |
1307 | ||
2528a7a6 LP |
1308 | bool unit_can_isolate(Unit *u) { |
1309 | assert(u); | |
1310 | ||
1311 | return unit_can_start(u) && | |
ac155bb8 | 1312 | u->allow_isolate; |
2528a7a6 LP |
1313 | } |
1314 | ||
87f0e418 LP |
1315 | /* Errors: |
1316 | * -EBADR: This unit type does not support stopping. | |
1317 | * -EALREADY: Unit is already stopped. | |
1318 | * -EAGAIN: An operation is already in progress. Retry later. | |
1319 | */ | |
1320 | int unit_stop(Unit *u) { | |
1321 | UnitActiveState state; | |
92ab323c | 1322 | Unit *following; |
87f0e418 LP |
1323 | |
1324 | assert(u); | |
1325 | ||
87f0e418 | 1326 | state = unit_active_state(u); |
fdf20a31 | 1327 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1328 | return -EALREADY; |
1329 | ||
92ab323c | 1330 | if ((following = unit_following(u))) { |
c1b6628d ZJS |
1331 | log_debug_unit(u->id, "Redirecting stop request from %s to %s.", |
1332 | u->id, following->id); | |
92ab323c LP |
1333 | return unit_stop(following); |
1334 | } | |
1335 | ||
877d54e9 LP |
1336 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); |
1337 | unit_status_print_starting_stopping(u, JOB_STOP); | |
c6918296 | 1338 | |
7898b0cf LP |
1339 | if (!UNIT_VTABLE(u)->stop) |
1340 | return -EBADR; | |
1341 | ||
c1e1601e | 1342 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1343 | |
87f0e418 LP |
1344 | return UNIT_VTABLE(u)->stop(u); |
1345 | } | |
1346 | ||
1347 | /* Errors: | |
1348 | * -EBADR: This unit type does not support reloading. | |
1349 | * -ENOEXEC: Unit is not started. | |
1350 | * -EAGAIN: An operation is already in progress. Retry later. | |
1351 | */ | |
1352 | int unit_reload(Unit *u) { | |
1353 | UnitActiveState state; | |
92ab323c | 1354 | Unit *following; |
87f0e418 LP |
1355 | |
1356 | assert(u); | |
1357 | ||
ac155bb8 | 1358 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1359 | return -EINVAL; |
1360 | ||
87f0e418 LP |
1361 | if (!unit_can_reload(u)) |
1362 | return -EBADR; | |
1363 | ||
1364 | state = unit_active_state(u); | |
e364ad06 | 1365 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1366 | return -EALREADY; |
1367 | ||
6a371e23 ZJS |
1368 | if (state != UNIT_ACTIVE) { |
1369 | log_warning_unit(u->id, "Unit %s cannot be reloaded because it is inactive.", | |
1370 | u->id); | |
87f0e418 | 1371 | return -ENOEXEC; |
6a371e23 | 1372 | } |
87f0e418 | 1373 | |
e48614c4 ZJS |
1374 | following = unit_following(u); |
1375 | if (following) { | |
c1b6628d ZJS |
1376 | log_debug_unit(u->id, "Redirecting reload request from %s to %s.", |
1377 | u->id, following->id); | |
92ab323c LP |
1378 | return unit_reload(following); |
1379 | } | |
1380 | ||
877d54e9 LP |
1381 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); |
1382 | ||
c1e1601e | 1383 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1384 | return UNIT_VTABLE(u)->reload(u); |
1385 | } | |
1386 | ||
1387 | bool unit_can_reload(Unit *u) { | |
1388 | assert(u); | |
1389 | ||
1390 | if (!UNIT_VTABLE(u)->reload) | |
1391 | return false; | |
1392 | ||
1393 | if (!UNIT_VTABLE(u)->can_reload) | |
1394 | return true; | |
1395 | ||
1396 | return UNIT_VTABLE(u)->can_reload(u); | |
1397 | } | |
1398 | ||
b4a16b7b | 1399 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1400 | Iterator i; |
1401 | Unit *other; | |
1402 | ||
1403 | assert(u); | |
1404 | ||
1405 | /* If this service shall be shut down when unneeded then do | |
1406 | * so. */ | |
1407 | ||
ac155bb8 | 1408 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1409 | return; |
1410 | ||
1411 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1412 | return; | |
1413 | ||
ac155bb8 | 1414 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
31afa0a4 | 1415 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1416 | return; |
1417 | ||
ac155bb8 | 1418 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
31afa0a4 | 1419 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1420 | return; |
1421 | ||
ac155bb8 | 1422 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
31afa0a4 | 1423 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1424 | return; |
1425 | ||
ac155bb8 | 1426 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
31afa0a4 | 1427 | if (unit_active_or_pending(other)) |
b81884e7 LP |
1428 | return; |
1429 | ||
c1b6628d | 1430 | log_info_unit(u->id, "Service %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1431 | |
1432 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1433 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1434 | } |
1435 | ||
87f0e418 LP |
1436 | static void retroactively_start_dependencies(Unit *u) { |
1437 | Iterator i; | |
1438 | Unit *other; | |
1439 | ||
1440 | assert(u); | |
1441 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1442 | ||
ac155bb8 MS |
1443 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1444 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1445 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1446 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1447 | |
7f2cddae | 1448 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1449 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1450 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1451 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1452 | |
ac155bb8 MS |
1453 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1454 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1455 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1456 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1457 | |
ac155bb8 MS |
1458 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1459 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1460 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1461 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1462 | |
ac155bb8 | 1463 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1464 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1465 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1466 | |
ac155bb8 | 1467 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1468 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1469 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1470 | } |
1471 | ||
1472 | static void retroactively_stop_dependencies(Unit *u) { | |
1473 | Iterator i; | |
1474 | Unit *other; | |
1475 | ||
1476 | assert(u); | |
1477 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1478 | ||
b81884e7 | 1479 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1480 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1481 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1482 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1483 | } |
1484 | ||
1485 | static void check_unneeded_dependencies(Unit *u) { | |
1486 | Iterator i; | |
1487 | Unit *other; | |
1488 | ||
1489 | assert(u); | |
1490 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1491 | |
1492 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1493 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1494 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1495 | unit_check_unneeded(other); |
ac155bb8 | 1496 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1497 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1498 | unit_check_unneeded(other); |
ac155bb8 | 1499 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1500 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1501 | unit_check_unneeded(other); |
ac155bb8 | 1502 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1503 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1504 | unit_check_unneeded(other); |
ac155bb8 | 1505 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1506 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1507 | unit_check_unneeded(other); |
7f2cddae | 1508 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1509 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1510 | unit_check_unneeded(other); | |
87f0e418 LP |
1511 | } |
1512 | ||
3ecaa09b | 1513 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1514 | Unit *other; |
1515 | Iterator i; | |
1516 | ||
1517 | assert(u); | |
1518 | ||
ac155bb8 | 1519 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1520 | return; |
1521 | ||
c1b6628d | 1522 | log_info_unit(u->id, "Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1523 | |
ac155bb8 | 1524 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1525 | int r; |
1526 | ||
d420282b | 1527 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d ZJS |
1528 | if (r < 0) |
1529 | log_error_unit(u->id, "Failed to enqueue OnFailure= job: %s", strerror(-r)); | |
222ae6a8 | 1530 | } |
c0daa706 LP |
1531 | } |
1532 | ||
3ecaa09b LP |
1533 | void unit_trigger_notify(Unit *u) { |
1534 | Unit *other; | |
1535 | Iterator i; | |
1536 | ||
1537 | assert(u); | |
1538 | ||
1539 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1540 | if (UNIT_VTABLE(other)->trigger_notify) | |
1541 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1542 | } | |
1543 | ||
e2f3b44c | 1544 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1545 | Manager *m; |
7e6e7b06 | 1546 | bool unexpected; |
a096ed36 | 1547 | |
87f0e418 LP |
1548 | assert(u); |
1549 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1550 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1551 | |
8e471ccd LP |
1552 | /* Note that this is called for all low-level state changes, |
1553 | * even if they might map to the same high-level | |
1554 | * UnitActiveState! That means that ns == os is OK an expected | |
c5315881 | 1555 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1556 | * this function will be called too! */ |
87f0e418 | 1557 | |
546ac4f0 MS |
1558 | m = u->manager; |
1559 | ||
f755e3b7 | 1560 | /* Update timestamps for state changes */ |
546ac4f0 | 1561 | if (m->n_reloading <= 0) { |
bdbf9951 | 1562 | dual_timestamp ts; |
173e3821 | 1563 | |
bdbf9951 | 1564 | dual_timestamp_get(&ts); |
173e3821 | 1565 | |
bdbf9951 | 1566 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1567 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1568 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1569 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1570 | |
1571 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1572 | u->active_enter_timestamp = ts; |
bdbf9951 | 1573 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1574 | u->active_exit_timestamp = ts; |
bdbf9951 | 1575 | } |
87f0e418 | 1576 | |
f755e3b7 LP |
1577 | /* Keep track of failed of units */ |
1578 | if (ns == UNIT_FAILED && os != UNIT_FAILED) | |
1579 | set_put(u->manager->failed_units, u); | |
1580 | else if (os == UNIT_FAILED && ns != UNIT_FAILED) | |
1581 | set_remove(u->manager->failed_units, u); | |
1582 | ||
1583 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1584 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
4ad49000 | 1585 | unit_destroy_cgroup(u); |
fb385181 | 1586 | |
9cd86184 | 1587 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1588 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1589 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1590 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1591 | ExecContext *ec; |
1592 | ||
1593 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1594 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1595 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1596 | m->n_on_console --; | |
1597 | ||
1598 | if (m->n_on_console == 0) | |
1599 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1600 | m->no_console_output = false; |
31a7eb86 ZJS |
1601 | } else |
1602 | m->n_on_console ++; | |
7ed9f6cd MS |
1603 | } |
1604 | } | |
1605 | ||
ac155bb8 | 1606 | if (u->job) { |
7e6e7b06 | 1607 | unexpected = false; |
87f0e418 | 1608 | |
ac155bb8 | 1609 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1610 | |
1611 | /* So we reached a different state for this | |
1612 | * job. Let's see if we can run it now if it | |
1613 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1614 | job_add_to_run_queue(u->job); |
87f0e418 | 1615 | |
b410e6b9 | 1616 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1617 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1618 | * hence needs to invalidate jobs. */ |
87f0e418 | 1619 | |
ac155bb8 | 1620 | switch (u->job->type) { |
87f0e418 | 1621 | |
b410e6b9 LP |
1622 | case JOB_START: |
1623 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1624 | |
b410e6b9 | 1625 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1626 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1627 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1628 | unexpected = true; |
41b02ec7 | 1629 | |
fdf20a31 | 1630 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1631 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1632 | } |
87f0e418 | 1633 | |
b410e6b9 | 1634 | break; |
87f0e418 | 1635 | |
b410e6b9 LP |
1636 | case JOB_RELOAD: |
1637 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1638 | |
ac155bb8 | 1639 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1640 | if (ns == UNIT_ACTIVE) |
5273510e | 1641 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1642 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1643 | unexpected = true; |
41b02ec7 | 1644 | |
fdf20a31 | 1645 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1646 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1647 | } |
b410e6b9 | 1648 | } |
87f0e418 | 1649 | |
b410e6b9 | 1650 | break; |
87f0e418 | 1651 | |
b410e6b9 LP |
1652 | case JOB_STOP: |
1653 | case JOB_RESTART: | |
1654 | case JOB_TRY_RESTART: | |
87f0e418 | 1655 | |
fdf20a31 | 1656 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1657 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1658 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1659 | unexpected = true; |
5273510e | 1660 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1661 | } |
87f0e418 | 1662 | |
b410e6b9 | 1663 | break; |
87f0e418 | 1664 | |
b410e6b9 LP |
1665 | default: |
1666 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1667 | } |
87f0e418 | 1668 | |
7e6e7b06 LP |
1669 | } else |
1670 | unexpected = true; | |
1671 | ||
546ac4f0 | 1672 | if (m->n_reloading <= 0) { |
f3bff0eb | 1673 | |
bdbf9951 LP |
1674 | /* If this state change happened without being |
1675 | * requested by a job, then let's retroactively start | |
1676 | * or stop dependencies. We skip that step when | |
1677 | * deserializing, since we don't want to create any | |
1678 | * additional jobs just because something is already | |
1679 | * activated. */ | |
1680 | ||
1681 | if (unexpected) { | |
1682 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1683 | retroactively_start_dependencies(u); | |
1684 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1685 | retroactively_stop_dependencies(u); | |
1686 | } | |
5de9682c | 1687 | |
cd0504d0 | 1688 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1689 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1690 | check_unneeded_dependencies(u); |
1691 | ||
bdbf9951 | 1692 | if (ns != os && ns == UNIT_FAILED) { |
b33918c2 | 1693 | log_notice_unit(u->id, "Unit %s entered failed state.", u->id); |
3ecaa09b | 1694 | unit_start_on_failure(u); |
cd6d0a45 | 1695 | } |
3b2775c5 | 1696 | } |
e537352b | 1697 | |
3b2775c5 LP |
1698 | /* Some names are special */ |
1699 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1700 | ||
1701 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
1702 | /* The bus just might have become available, | |
1703 | * hence try to connect to it, if we aren't | |
1704 | * yet connected. */ | |
546ac4f0 | 1705 | bus_init(m, true); |
3b2775c5 | 1706 | |
ac155bb8 | 1707 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1708 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1709 | m->n_reloading <= 0) { |
3b2775c5 | 1710 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1711 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1712 | u->in_audit = true; |
3b2775c5 | 1713 | } |
e983b760 | 1714 | |
3b2775c5 | 1715 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1716 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1717 | |
3b2775c5 | 1718 | } else { |
bdbf9951 | 1719 | |
3b2775c5 LP |
1720 | /* We don't care about D-Bus here, since we'll get an |
1721 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1722 | |
ac155bb8 | 1723 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1724 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1725 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1726 | m->n_reloading <= 0) { |
4927fcae | 1727 | |
3b2775c5 LP |
1728 | /* Hmm, if there was no start record written |
1729 | * write it now, so that we always have a nice | |
1730 | * pair */ | |
ac155bb8 | 1731 | if (!u->in_audit) { |
546ac4f0 | 1732 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1733 | |
3b2775c5 | 1734 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1735 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1736 | } else |
1737 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1738 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1739 | |
ac155bb8 | 1740 | u->in_audit = false; |
cd6d0a45 | 1741 | } |
f278026d LP |
1742 | } |
1743 | ||
546ac4f0 | 1744 | manager_recheck_journal(m); |
3ecaa09b | 1745 | unit_trigger_notify(u); |
3b2775c5 | 1746 | |
f3bff0eb LP |
1747 | /* Maybe we finished startup and are now ready for being |
1748 | * stopped because unneeded? */ | |
bf6dcfa6 OS |
1749 | if (u->manager->n_reloading <= 0) |
1750 | unit_check_unneeded(u); | |
c1e1601e LP |
1751 | |
1752 | unit_add_to_dbus_queue(u); | |
701cc384 | 1753 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1754 | } |
1755 | ||
87f0e418 | 1756 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
1757 | int q, r; |
1758 | ||
87f0e418 LP |
1759 | assert(u); |
1760 | assert(pid >= 1); | |
1761 | ||
5ba6985b LP |
1762 | /* Watch a specific PID. We only support one or two units |
1763 | * watching each PID for now, not more. */ | |
1764 | ||
bd44e61b | 1765 | r = set_ensure_allocated(&u->pids, trivial_hash_func, trivial_compare_func); |
5ba6985b LP |
1766 | if (r < 0) |
1767 | return r; | |
1768 | ||
bd44e61b | 1769 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, trivial_hash_func, trivial_compare_func); |
a911bb9a LP |
1770 | if (r < 0) |
1771 | return r; | |
1772 | ||
5ba6985b LP |
1773 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
1774 | if (r == -EEXIST) { | |
1775 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, trivial_hash_func, trivial_compare_func); | |
1776 | if (r < 0) | |
1777 | return r; | |
05e343b7 | 1778 | |
5ba6985b LP |
1779 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
1780 | } | |
a911bb9a | 1781 | |
5ba6985b | 1782 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
a911bb9a LP |
1783 | if (q < 0) |
1784 | return q; | |
1785 | ||
1786 | return r; | |
87f0e418 LP |
1787 | } |
1788 | ||
1789 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1790 | assert(u); | |
1791 | assert(pid >= 1); | |
1792 | ||
5ba6985b LP |
1793 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
1794 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
a911bb9a LP |
1795 | set_remove(u->pids, LONG_TO_PTR(pid)); |
1796 | } | |
1797 | ||
bd44e61b LP |
1798 | void unit_unwatch_all_pids(Unit *u) { |
1799 | assert(u); | |
1800 | ||
1801 | while (!set_isempty(u->pids)) | |
1802 | unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids))); | |
1803 | ||
1804 | set_free(u->pids); | |
1805 | u->pids = NULL; | |
1806 | } | |
1807 | ||
1808 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
a911bb9a LP |
1809 | _cleanup_closedir_ DIR *d = NULL; |
1810 | _cleanup_fclose_ FILE *f = NULL; | |
1811 | int ret = 0, r; | |
1812 | ||
1813 | assert(u); | |
1814 | assert(path); | |
1815 | ||
1816 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ | |
1817 | ||
1818 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
1819 | if (r >= 0) { | |
1820 | pid_t pid; | |
1821 | ||
1822 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
1823 | r = unit_watch_pid(u, pid); | |
1824 | if (r < 0 && ret >= 0) | |
1825 | ret = r; | |
1826 | } | |
1827 | if (r < 0 && ret >= 0) | |
1828 | ret = r; | |
1829 | ||
1830 | } else if (ret >= 0) | |
1831 | ret = r; | |
1832 | ||
1833 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
1834 | if (r >= 0) { | |
1835 | char *fn; | |
1836 | ||
1837 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
1838 | _cleanup_free_ char *p = NULL; | |
1839 | ||
1840 | p = strjoin(path, "/", fn, NULL); | |
1841 | free(fn); | |
1842 | ||
1843 | if (!p) | |
1844 | return -ENOMEM; | |
1845 | ||
bd44e61b | 1846 | r = unit_watch_pids_in_path(u, p); |
a911bb9a LP |
1847 | if (r < 0 && ret >= 0) |
1848 | ret = r; | |
1849 | } | |
1850 | if (r < 0 && ret >= 0) | |
1851 | ret = r; | |
1852 | ||
1853 | } else if (ret >= 0) | |
1854 | ret = r; | |
1855 | ||
1856 | return ret; | |
1857 | } | |
1858 | ||
a911bb9a LP |
1859 | int unit_watch_all_pids(Unit *u) { |
1860 | assert(u); | |
1861 | ||
a911bb9a LP |
1862 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ |
1863 | ||
bd44e61b LP |
1864 | if (!u->cgroup_path) |
1865 | return -ENOENT; | |
a911bb9a | 1866 | |
bd44e61b | 1867 | return unit_watch_pids_in_path(u, u->cgroup_path); |
a911bb9a LP |
1868 | } |
1869 | ||
1870 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
1871 | Iterator i; | |
1872 | void *e; | |
1873 | ||
1874 | assert(u); | |
1875 | ||
1876 | /* Cleans dead PIDs from our list */ | |
1877 | ||
1878 | SET_FOREACH(e, u->pids, i) { | |
1879 | pid_t pid = PTR_TO_LONG(e); | |
1880 | ||
1881 | if (pid == except1 || pid == except2) | |
1882 | continue; | |
1883 | ||
9f5650ae | 1884 | if (!pid_is_unwaited(pid)) |
bd44e61b | 1885 | unit_unwatch_pid(u, pid); |
a911bb9a | 1886 | } |
87f0e418 LP |
1887 | } |
1888 | ||
87f0e418 LP |
1889 | bool unit_job_is_applicable(Unit *u, JobType j) { |
1890 | assert(u); | |
1891 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1892 | ||
1893 | switch (j) { | |
1894 | ||
1895 | case JOB_VERIFY_ACTIVE: | |
1896 | case JOB_START: | |
57339f47 | 1897 | case JOB_STOP: |
e0209d83 | 1898 | case JOB_NOP: |
87f0e418 LP |
1899 | return true; |
1900 | ||
87f0e418 LP |
1901 | case JOB_RESTART: |
1902 | case JOB_TRY_RESTART: | |
1903 | return unit_can_start(u); | |
1904 | ||
1905 | case JOB_RELOAD: | |
1906 | return unit_can_reload(u); | |
1907 | ||
1908 | case JOB_RELOAD_OR_START: | |
1909 | return unit_can_reload(u) && unit_can_start(u); | |
1910 | ||
1911 | default: | |
1912 | assert_not_reached("Invalid job type"); | |
1913 | } | |
1914 | } | |
1915 | ||
701cc384 | 1916 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
1917 | |
1918 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1919 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1920 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
1921 | [UNIT_WANTS] = UNIT_WANTED_BY, |
1922 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 1923 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 1924 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 1925 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 1926 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 1927 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 1928 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 1929 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 1930 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
1931 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
1932 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 1933 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 1934 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 1935 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 1936 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
1937 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
1938 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 1939 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 1940 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 1941 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 1942 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 1943 | }; |
701cc384 | 1944 | int r, q = 0, v = 0, w = 0; |
87f0e418 LP |
1945 | |
1946 | assert(u); | |
1947 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
1948 | assert(other); |
1949 | ||
9f151f29 LP |
1950 | u = unit_follow_merge(u); |
1951 | other = unit_follow_merge(other); | |
1952 | ||
87f0e418 LP |
1953 | /* We won't allow dependencies on ourselves. We will not |
1954 | * consider them an error however. */ | |
1955 | if (u == other) | |
1956 | return 0; | |
1957 | ||
613b411c LP |
1958 | r = set_ensure_allocated(&u->dependencies[d], trivial_hash_func, trivial_compare_func); |
1959 | if (r < 0) | |
87f0e418 LP |
1960 | return r; |
1961 | ||
613b411c LP |
1962 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
1963 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func); | |
1964 | if (r < 0) | |
1965 | return r; | |
1966 | } | |
1967 | ||
1968 | if (add_reference) { | |
1969 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], trivial_hash_func, trivial_compare_func); | |
1970 | if (r < 0) | |
5de9682c LP |
1971 | return r; |
1972 | ||
613b411c LP |
1973 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], trivial_hash_func, trivial_compare_func); |
1974 | if (r < 0) | |
701cc384 | 1975 | return r; |
613b411c | 1976 | } |
87f0e418 | 1977 | |
613b411c LP |
1978 | q = set_put(u->dependencies[d], other); |
1979 | if (q < 0) | |
701cc384 | 1980 | return q; |
87f0e418 | 1981 | |
613b411c LP |
1982 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
1983 | v = set_put(other->dependencies[inverse_table[d]], u); | |
1984 | if (v < 0) { | |
5de9682c LP |
1985 | r = v; |
1986 | goto fail; | |
1987 | } | |
613b411c | 1988 | } |
701cc384 LP |
1989 | |
1990 | if (add_reference) { | |
613b411c LP |
1991 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
1992 | if (w < 0) { | |
701cc384 LP |
1993 | r = w; |
1994 | goto fail; | |
1995 | } | |
1996 | ||
613b411c LP |
1997 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
1998 | if (r < 0) | |
701cc384 | 1999 | goto fail; |
87f0e418 LP |
2000 | } |
2001 | ||
c1e1601e | 2002 | unit_add_to_dbus_queue(u); |
87f0e418 | 2003 | return 0; |
701cc384 LP |
2004 | |
2005 | fail: | |
2006 | if (q > 0) | |
ac155bb8 | 2007 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2008 | |
2009 | if (v > 0) | |
ac155bb8 | 2010 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2011 | |
2012 | if (w > 0) | |
ac155bb8 | 2013 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2014 | |
2015 | return r; | |
87f0e418 | 2016 | } |
0301abf4 | 2017 | |
2c966c03 LP |
2018 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2019 | int r; | |
2020 | ||
2021 | assert(u); | |
2022 | ||
2023 | if ((r = unit_add_dependency(u, d, other, add_reference)) < 0) | |
2024 | return r; | |
2025 | ||
2026 | if ((r = unit_add_dependency(u, e, other, add_reference)) < 0) | |
2027 | return r; | |
2028 | ||
2029 | return 0; | |
2030 | } | |
2031 | ||
9e2f7c11 LP |
2032 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
2033 | char *s; | |
2034 | ||
2035 | assert(u); | |
2036 | assert(name || path); | |
8afbb8e1 | 2037 | assert(p); |
9e2f7c11 LP |
2038 | |
2039 | if (!name) | |
2b6bf07d | 2040 | name = basename(path); |
9e2f7c11 LP |
2041 | |
2042 | if (!unit_name_is_template(name)) { | |
2043 | *p = NULL; | |
2044 | return name; | |
2045 | } | |
2046 | ||
ac155bb8 MS |
2047 | if (u->instance) |
2048 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 | 2049 | else { |
ae018d9b | 2050 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2051 | |
8afbb8e1 LP |
2052 | i = unit_name_to_prefix(u->id); |
2053 | if (!i) | |
9e2f7c11 LP |
2054 | return NULL; |
2055 | ||
2056 | s = unit_name_replace_instance(name, i); | |
9e2f7c11 LP |
2057 | } |
2058 | ||
2059 | if (!s) | |
2060 | return NULL; | |
2061 | ||
2062 | *p = s; | |
2063 | return s; | |
2064 | } | |
2065 | ||
701cc384 | 2066 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
2067 | Unit *other; |
2068 | int r; | |
8afbb8e1 | 2069 | _cleanup_free_ char *s = NULL; |
09b6b09f | 2070 | |
9e2f7c11 LP |
2071 | assert(u); |
2072 | assert(name || path); | |
09b6b09f | 2073 | |
8afbb8e1 LP |
2074 | name = resolve_template(u, name, path, &s); |
2075 | if (!name) | |
9e2f7c11 | 2076 | return -ENOMEM; |
09b6b09f | 2077 | |
8afbb8e1 LP |
2078 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2079 | if (r < 0) | |
2080 | return r; | |
9e2f7c11 | 2081 | |
8afbb8e1 | 2082 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2083 | } |
2084 | ||
2c966c03 LP |
2085 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2086 | Unit *other; | |
2087 | int r; | |
68eda4bd | 2088 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2089 | |
2090 | assert(u); | |
2091 | assert(name || path); | |
2092 | ||
2093 | if (!(name = resolve_template(u, name, path, &s))) | |
2094 | return -ENOMEM; | |
2095 | ||
ac155bb8 | 2096 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
68eda4bd | 2097 | return r; |
2c966c03 LP |
2098 | |
2099 | r = unit_add_two_dependencies(u, d, e, other, add_reference); | |
2100 | ||
2c966c03 LP |
2101 | return r; |
2102 | } | |
2103 | ||
701cc384 | 2104 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
2105 | Unit *other; |
2106 | int r; | |
68eda4bd | 2107 | _cleanup_free_ char *s = NULL; |
bd77d0fc | 2108 | |
9e2f7c11 LP |
2109 | assert(u); |
2110 | assert(name || path); | |
bd77d0fc | 2111 | |
9e2f7c11 LP |
2112 | if (!(name = resolve_template(u, name, path, &s))) |
2113 | return -ENOMEM; | |
bd77d0fc | 2114 | |
ac155bb8 | 2115 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
68eda4bd | 2116 | return r; |
9e2f7c11 | 2117 | |
701cc384 | 2118 | r = unit_add_dependency(other, d, u, add_reference); |
9e2f7c11 | 2119 | |
9e2f7c11 | 2120 | return r; |
bd77d0fc LP |
2121 | } |
2122 | ||
2c966c03 LP |
2123 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2124 | Unit *other; | |
2125 | int r; | |
68eda4bd | 2126 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2127 | |
2128 | assert(u); | |
2129 | assert(name || path); | |
2130 | ||
2131 | if (!(name = resolve_template(u, name, path, &s))) | |
2132 | return -ENOMEM; | |
2133 | ||
ac155bb8 | 2134 | if ((r = manager_load_unit(u->manager, name, path, NULL, &other)) < 0) |
68eda4bd | 2135 | return r; |
2c966c03 LP |
2136 | |
2137 | if ((r = unit_add_two_dependencies(other, d, e, u, add_reference)) < 0) | |
68eda4bd | 2138 | return r; |
2c966c03 | 2139 | |
2c966c03 LP |
2140 | return r; |
2141 | } | |
2142 | ||
0301abf4 | 2143 | int set_unit_path(const char *p) { |
26d04f86 | 2144 | _cleanup_free_ char *c = NULL; |
0301abf4 LP |
2145 | |
2146 | /* This is mostly for debug purposes */ | |
26d04f86 LP |
2147 | c = path_make_absolute_cwd(p); |
2148 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) | |
2149 | return -errno; | |
0301abf4 LP |
2150 | |
2151 | return 0; | |
2152 | } | |
88066b3a | 2153 | |
ea430986 | 2154 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2155 | assert(u); |
2156 | ||
ac155bb8 | 2157 | if (!u->id) |
04ade7d2 LP |
2158 | return NULL; |
2159 | ||
48899192 | 2160 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2161 | } |
2162 | ||
41f9172f | 2163 | char *unit_default_cgroup_path(Unit *u) { |
d7bd3de0 | 2164 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
a016b922 | 2165 | int r; |
5954c074 | 2166 | |
013b87c0 LP |
2167 | assert(u); |
2168 | ||
4ad49000 LP |
2169 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2170 | return strdup(u->manager->cgroup_root); | |
2171 | ||
2172 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2173 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2174 | if (r < 0) | |
2175 | return NULL; | |
2176 | } | |
2177 | ||
d7bd3de0 LP |
2178 | escaped = cg_escape(u->id); |
2179 | if (!escaped) | |
5954c074 LP |
2180 | return NULL; |
2181 | ||
d7bd3de0 LP |
2182 | if (slice) |
2183 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2184 | else | |
2185 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
013b87c0 LP |
2186 | } |
2187 | ||
598459ce | 2188 | int unit_add_default_slice(Unit *u, CGroupContext *c) { |
a8833944 LP |
2189 | _cleanup_free_ char *b = NULL; |
2190 | const char *slice_name; | |
a016b922 LP |
2191 | Unit *slice; |
2192 | int r; | |
2193 | ||
2194 | assert(u); | |
598459ce | 2195 | assert(c); |
a016b922 | 2196 | |
9444b1f2 | 2197 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2198 | return 0; |
2199 | ||
a8833944 LP |
2200 | if (u->instance) { |
2201 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2202 | |
a8833944 LP |
2203 | /* Implicitly place all instantiated units in their |
2204 | * own per-template slice */ | |
2205 | ||
2206 | prefix = unit_name_to_prefix(u->id); | |
2207 | if (!prefix) | |
2208 | return -ENOMEM; | |
2209 | ||
2210 | /* The prefix is already escaped, but it might include | |
2211 | * "-" which has a special meaning for slice units, | |
2212 | * hence escape it here extra. */ | |
2213 | escaped = strreplace(prefix, "-", "\\x2d"); | |
2214 | if (!escaped) | |
2215 | return -ENOMEM; | |
2216 | ||
2217 | if (u->manager->running_as == SYSTEMD_SYSTEM) | |
2218 | b = strjoin("system-", escaped, ".slice", NULL); | |
2219 | else | |
2220 | b = strappend(escaped, ".slice"); | |
2221 | if (!b) | |
2222 | return -ENOMEM; | |
2223 | ||
2224 | slice_name = b; | |
2225 | } else | |
2226 | slice_name = | |
2227 | u->manager->running_as == SYSTEMD_SYSTEM | |
2228 | ? SPECIAL_SYSTEM_SLICE | |
2229 | : SPECIAL_ROOT_SLICE; | |
2230 | ||
2231 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2232 | if (r < 0) |
2233 | return r; | |
2234 | ||
2235 | unit_ref_set(&u->slice, slice); | |
2236 | return 0; | |
2237 | } | |
2238 | ||
9444b1f2 LP |
2239 | const char *unit_slice_name(Unit *u) { |
2240 | assert(u); | |
2241 | ||
2242 | if (!UNIT_ISSET(u->slice)) | |
2243 | return NULL; | |
2244 | ||
2245 | return UNIT_DEREF(u->slice)->id; | |
2246 | } | |
2247 | ||
f6ff8c29 | 2248 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2249 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2250 | int r; |
2251 | ||
2252 | assert(u); | |
2253 | assert(type); | |
2254 | assert(_found); | |
2255 | ||
78edb35a LP |
2256 | t = unit_name_change_suffix(u->id, type); |
2257 | if (!t) | |
f6ff8c29 LP |
2258 | return -ENOMEM; |
2259 | ||
2260 | assert(!unit_has_name(u, t)); | |
2261 | ||
ac155bb8 | 2262 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2263 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2264 | return r; |
2265 | } | |
2266 | ||
05e343b7 LP |
2267 | int unit_watch_bus_name(Unit *u, const char *name) { |
2268 | assert(u); | |
2269 | assert(name); | |
2270 | ||
2271 | /* Watch a specific name on the bus. We only support one unit | |
2272 | * watching each name for now. */ | |
2273 | ||
ac155bb8 | 2274 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2275 | } |
2276 | ||
2277 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2278 | assert(u); | |
2279 | assert(name); | |
2280 | ||
ac155bb8 | 2281 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2282 | } |
2283 | ||
a16e1123 LP |
2284 | bool unit_can_serialize(Unit *u) { |
2285 | assert(u); | |
2286 | ||
2287 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2288 | } | |
2289 | ||
6b78f9b4 | 2290 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
613b411c | 2291 | ExecRuntime *rt; |
a16e1123 LP |
2292 | int r; |
2293 | ||
2294 | assert(u); | |
2295 | assert(f); | |
2296 | assert(fds); | |
2297 | ||
2298 | if (!unit_can_serialize(u)) | |
2299 | return 0; | |
2300 | ||
6fa48533 LP |
2301 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
2302 | if (r < 0) | |
a16e1123 LP |
2303 | return r; |
2304 | ||
613b411c LP |
2305 | rt = unit_get_exec_runtime(u); |
2306 | if (rt) { | |
2307 | r = exec_runtime_serialize(rt, u, f, fds); | |
2308 | if (r < 0) | |
2309 | return r; | |
e0209d83 MS |
2310 | } |
2311 | ||
ac155bb8 MS |
2312 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2313 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2314 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2315 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2316 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
2791a8f8 | 2317 | |
ac155bb8 MS |
2318 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2319 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2320 | |
c2756a68 LP |
2321 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
2322 | ||
2323 | if (u->cgroup_path) | |
2324 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
2325 | ||
613b411c LP |
2326 | if (serialize_jobs) { |
2327 | if (u->job) { | |
2328 | fprintf(f, "job\n"); | |
2329 | job_serialize(u->job, f, fds); | |
2330 | } | |
2331 | ||
2332 | if (u->nop_job) { | |
2333 | fprintf(f, "job\n"); | |
2334 | job_serialize(u->nop_job, f, fds); | |
2335 | } | |
2336 | } | |
2337 | ||
a16e1123 LP |
2338 | /* End marker */ |
2339 | fputc('\n', f); | |
2340 | return 0; | |
2341 | } | |
2342 | ||
2343 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2344 | va_list ap; | |
2345 | ||
2346 | assert(u); | |
2347 | assert(f); | |
2348 | assert(key); | |
2349 | assert(format); | |
2350 | ||
2351 | fputs(key, f); | |
2352 | fputc('=', f); | |
2353 | ||
2354 | va_start(ap, format); | |
2355 | vfprintf(f, format, ap); | |
2356 | va_end(ap); | |
2357 | ||
2358 | fputc('\n', f); | |
2359 | } | |
2360 | ||
2361 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2362 | assert(u); | |
2363 | assert(f); | |
2364 | assert(key); | |
2365 | assert(value); | |
2366 | ||
2367 | fprintf(f, "%s=%s\n", key, value); | |
2368 | } | |
2369 | ||
2370 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
613b411c | 2371 | size_t offset; |
28b99ccd | 2372 | ExecRuntime **rt = NULL; |
a16e1123 LP |
2373 | int r; |
2374 | ||
2375 | assert(u); | |
2376 | assert(f); | |
2377 | assert(fds); | |
2378 | ||
2379 | if (!unit_can_serialize(u)) | |
2380 | return 0; | |
2381 | ||
613b411c LP |
2382 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2383 | if (offset > 0) | |
2384 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2385 | ||
a16e1123 | 2386 | for (;;) { |
20c03b7b | 2387 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2388 | size_t k; |
2389 | ||
2390 | if (!fgets(line, sizeof(line), f)) { | |
2391 | if (feof(f)) | |
2392 | return 0; | |
2393 | return -errno; | |
2394 | } | |
2395 | ||
10f8e83c | 2396 | char_array_0(line); |
a16e1123 LP |
2397 | l = strstrip(line); |
2398 | ||
2399 | /* End marker */ | |
2400 | if (l[0] == 0) | |
2401 | return 0; | |
2402 | ||
2403 | k = strcspn(l, "="); | |
2404 | ||
2405 | if (l[k] == '=') { | |
2406 | l[k] = 0; | |
2407 | v = l+k+1; | |
2408 | } else | |
2409 | v = l+k; | |
2410 | ||
cca098b0 | 2411 | if (streq(l, "job")) { |
39a18c60 MS |
2412 | if (v[0] == '\0') { |
2413 | /* new-style serialized job */ | |
2414 | Job *j = job_new_raw(u); | |
2415 | if (!j) | |
2416 | return -ENOMEM; | |
2417 | ||
2418 | r = job_deserialize(j, f, fds); | |
2419 | if (r < 0) { | |
2420 | job_free(j); | |
2421 | return r; | |
2422 | } | |
cca098b0 | 2423 | |
39a18c60 MS |
2424 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2425 | if (r < 0) { | |
2426 | job_free(j); | |
2427 | return r; | |
2428 | } | |
e0209d83 MS |
2429 | |
2430 | r = job_install_deserialized(j); | |
2431 | if (r < 0) { | |
2432 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2433 | job_free(j); | |
2434 | return r; | |
2435 | } | |
6b19ad24 MS |
2436 | |
2437 | if (j->state == JOB_RUNNING) | |
2438 | u->manager->n_running_jobs++; | |
39a18c60 MS |
2439 | } else { |
2440 | /* legacy */ | |
2441 | JobType type = job_type_from_string(v); | |
2442 | if (type < 0) | |
2443 | log_debug("Failed to parse job type value %s", v); | |
2444 | else | |
2445 | u->deserialized_job = type; | |
2446 | } | |
cca098b0 | 2447 | continue; |
8aaf019b | 2448 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2449 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2450 | continue; |
2451 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2452 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2453 | continue; |
2454 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2455 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2456 | continue; |
2457 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2458 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2459 | continue; |
2791a8f8 | 2460 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2461 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 LP |
2462 | continue; |
2463 | } else if (streq(l, "condition-result")) { | |
2464 | int b; | |
2465 | ||
c2756a68 LP |
2466 | b = parse_boolean(v); |
2467 | if (b < 0) | |
2791a8f8 LP |
2468 | log_debug("Failed to parse condition result value %s", v); |
2469 | else | |
ac155bb8 | 2470 | u->condition_result = b; |
efbac6d2 LP |
2471 | |
2472 | continue; | |
c2756a68 LP |
2473 | |
2474 | } else if (streq(l, "transient")) { | |
2475 | int b; | |
2476 | ||
2477 | b = parse_boolean(v); | |
2478 | if (b < 0) | |
2479 | log_debug("Failed to parse transient bool %s", v); | |
2480 | else | |
2481 | u->transient = b; | |
2482 | ||
2483 | continue; | |
2484 | } else if (streq(l, "cgroup")) { | |
2485 | char *s; | |
2486 | ||
2487 | s = strdup(v); | |
f440e1bb | 2488 | if (!s) |
c2756a68 LP |
2489 | return -ENOMEM; |
2490 | ||
4e595329 ZJS |
2491 | if (u->cgroup_path) { |
2492 | void *p; | |
2493 | ||
2494 | p = hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
2495 | log_info("Removing cgroup_path %s from hashmap (%p)", | |
2496 | u->cgroup_path, p); | |
2497 | free(u->cgroup_path); | |
2498 | } | |
72673e86 | 2499 | |
4e595329 | 2500 | u->cgroup_path = s; |
b58b8e11 | 2501 | assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1); |
4e595329 | 2502 | |
c2756a68 | 2503 | continue; |
8aaf019b | 2504 | } |
cca098b0 | 2505 | |
613b411c LP |
2506 | if (rt) { |
2507 | r = exec_runtime_deserialize_item(rt, u, l, v, fds); | |
2508 | if (r < 0) | |
2509 | return r; | |
2510 | if (r > 0) | |
2511 | continue; | |
2512 | } | |
2513 | ||
c2756a68 LP |
2514 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); |
2515 | if (r < 0) | |
a16e1123 LP |
2516 | return r; |
2517 | } | |
2518 | } | |
2519 | ||
6e2ef85b LP |
2520 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2521 | Unit *device; | |
68eda4bd | 2522 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2523 | int r; |
2524 | ||
2525 | assert(u); | |
2526 | ||
2527 | if (!what) | |
2528 | return 0; | |
2529 | ||
2530 | /* Adds in links to the device node that this unit is based on */ | |
2531 | ||
8407a5d0 | 2532 | if (!is_device_path(what)) |
6e2ef85b LP |
2533 | return 0; |
2534 | ||
35eb6b12 LP |
2535 | e = unit_name_from_path(what, ".device"); |
2536 | if (!e) | |
6e2ef85b LP |
2537 | return -ENOMEM; |
2538 | ||
ac155bb8 | 2539 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
68eda4bd | 2540 | |
6e2ef85b LP |
2541 | if (r < 0) |
2542 | return r; | |
2543 | ||
faa368e3 LP |
2544 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true); |
2545 | if (r < 0) | |
6e2ef85b LP |
2546 | return r; |
2547 | ||
faa368e3 LP |
2548 | if (wants) { |
2549 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2550 | if (r < 0) | |
6e2ef85b | 2551 | return r; |
faa368e3 | 2552 | } |
6e2ef85b LP |
2553 | |
2554 | return 0; | |
2555 | } | |
a16e1123 | 2556 | |
cca098b0 LP |
2557 | int unit_coldplug(Unit *u) { |
2558 | int r; | |
2559 | ||
2560 | assert(u); | |
2561 | ||
2562 | if (UNIT_VTABLE(u)->coldplug) | |
2563 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2564 | return r; | |
2565 | ||
39a18c60 MS |
2566 | if (u->job) { |
2567 | r = job_coldplug(u->job); | |
2568 | if (r < 0) | |
2569 | return r; | |
2570 | } else if (u->deserialized_job >= 0) { | |
2571 | /* legacy */ | |
2572 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2573 | if (r < 0) | |
cca098b0 LP |
2574 | return r; |
2575 | ||
ac155bb8 | 2576 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2577 | } |
2578 | ||
2579 | return 0; | |
2580 | } | |
2581 | ||
49b1d377 | 2582 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2583 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 2584 | manager_status_printf(u->manager, false, status, unit_status_msg_format, unit_description(u)); |
bcfce235 | 2585 | REENABLE_WARNING; |
49b1d377 MS |
2586 | } |
2587 | ||
45fb0699 | 2588 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2589 | _cleanup_strv_free_ char **t = NULL; |
2590 | char **path; | |
1b64d026 | 2591 | struct stat st; |
ae7a7182 | 2592 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2593 | |
45fb0699 LP |
2594 | assert(u); |
2595 | ||
ac155bb8 | 2596 | if (u->fragment_path) { |
5f4b19f4 | 2597 | zero(st); |
ac155bb8 | 2598 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2599 | /* What, cannot access this anymore? */ |
2600 | return true; | |
45fb0699 | 2601 | |
ac155bb8 MS |
2602 | if (u->fragment_mtime > 0 && |
2603 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2604 | return true; |
2605 | } | |
2606 | ||
1b64d026 LP |
2607 | if (u->source_path) { |
2608 | zero(st); | |
2609 | if (stat(u->source_path, &st) < 0) | |
2610 | return true; | |
2611 | ||
2612 | if (u->source_mtime > 0 && | |
2613 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2614 | return true; | |
2615 | } | |
5f4b19f4 | 2616 | |
ae7a7182 OS |
2617 | t = unit_find_dropin_paths(u); |
2618 | loaded_cnt = strv_length(t); | |
2619 | current_cnt = strv_length(u->dropin_paths); | |
2620 | ||
2621 | if (loaded_cnt == current_cnt) { | |
2622 | if (loaded_cnt == 0) | |
2623 | return false; | |
2624 | ||
2625 | if (strv_overlap(u->dropin_paths, t)) { | |
2626 | STRV_FOREACH(path, u->dropin_paths) { | |
2627 | zero(st); | |
2628 | if (stat(*path, &st) < 0) | |
2629 | return true; | |
2630 | ||
2631 | if (u->dropin_mtime > 0 && | |
2632 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2633 | return true; | |
2634 | } | |
2635 | ||
2636 | return false; | |
2637 | } else | |
2638 | return true; | |
2639 | } else | |
2640 | return true; | |
45fb0699 LP |
2641 | } |
2642 | ||
fdf20a31 | 2643 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2644 | assert(u); |
2645 | ||
fdf20a31 MM |
2646 | if (UNIT_VTABLE(u)->reset_failed) |
2647 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2648 | } |
2649 | ||
a7f241db LP |
2650 | Unit *unit_following(Unit *u) { |
2651 | assert(u); | |
2652 | ||
2653 | if (UNIT_VTABLE(u)->following) | |
2654 | return UNIT_VTABLE(u)->following(u); | |
2655 | ||
2656 | return NULL; | |
2657 | } | |
2658 | ||
31afa0a4 | 2659 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2660 | assert(u); |
2661 | ||
31afa0a4 LP |
2662 | /* This call does check the current state of the unit. It's |
2663 | * hence useful to be called from state change calls of the | |
2664 | * unit itself, where the state isn't updated yet. This is | |
2665 | * different from unit_inactive_or_pending() which checks both | |
2666 | * the current state and for a queued job. */ | |
18ffdfda | 2667 | |
31afa0a4 LP |
2668 | return u->job && u->job->type == JOB_STOP; |
2669 | } | |
2670 | ||
2671 | bool unit_inactive_or_pending(Unit *u) { | |
2672 | assert(u); | |
2673 | ||
2674 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 2675 | |
d956ac29 LP |
2676 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
2677 | return true; | |
2678 | ||
31afa0a4 | 2679 | if (unit_stop_pending(u)) |
18ffdfda LP |
2680 | return true; |
2681 | ||
2682 | return false; | |
2683 | } | |
2684 | ||
31afa0a4 | 2685 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
2686 | assert(u); |
2687 | ||
f60c2665 | 2688 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2689 | |
2690 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2691 | return true; | |
2692 | ||
ac155bb8 MS |
2693 | if (u->job && |
2694 | (u->job->type == JOB_START || | |
2695 | u->job->type == JOB_RELOAD_OR_START || | |
2696 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2697 | return true; |
2698 | ||
2699 | return false; | |
2700 | } | |
2701 | ||
718db961 | 2702 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
2703 | assert(u); |
2704 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2705 | assert(signo > 0); |
2706 | assert(signo < _NSIG); | |
2707 | ||
8a0867d6 LP |
2708 | if (!UNIT_VTABLE(u)->kill) |
2709 | return -ENOTSUP; | |
2710 | ||
c74f17d9 | 2711 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2712 | } |
2713 | ||
82659fd7 LP |
2714 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
2715 | Set *pid_set; | |
2716 | int r; | |
2717 | ||
2718 | pid_set = set_new(trivial_hash_func, trivial_compare_func); | |
2719 | if (!pid_set) | |
2720 | return NULL; | |
2721 | ||
2722 | /* Exclude the main/control pids from being killed via the cgroup */ | |
2723 | if (main_pid > 0) { | |
2724 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
2725 | if (r < 0) | |
2726 | goto fail; | |
2727 | } | |
2728 | ||
2729 | if (control_pid > 0) { | |
2730 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
2731 | if (r < 0) | |
2732 | goto fail; | |
2733 | } | |
2734 | ||
2735 | return pid_set; | |
2736 | ||
2737 | fail: | |
2738 | set_free(pid_set); | |
2739 | return NULL; | |
2740 | } | |
2741 | ||
d91c34f2 LP |
2742 | int unit_kill_common( |
2743 | Unit *u, | |
2744 | KillWho who, | |
2745 | int signo, | |
2746 | pid_t main_pid, | |
2747 | pid_t control_pid, | |
718db961 | 2748 | sd_bus_error *error) { |
d91c34f2 | 2749 | |
814cc562 MS |
2750 | int r = 0; |
2751 | ||
2752 | if (who == KILL_MAIN && main_pid <= 0) { | |
2753 | if (main_pid < 0) | |
718db961 | 2754 | sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
814cc562 | 2755 | else |
718db961 | 2756 | sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
2757 | return -ESRCH; |
2758 | } | |
2759 | ||
2760 | if (who == KILL_CONTROL && control_pid <= 0) { | |
2761 | if (control_pid < 0) | |
718db961 | 2762 | sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
814cc562 | 2763 | else |
718db961 | 2764 | sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
2765 | return -ESRCH; |
2766 | } | |
2767 | ||
2768 | if (who == KILL_CONTROL || who == KILL_ALL) | |
2769 | if (control_pid > 0) | |
2770 | if (kill(control_pid, signo) < 0) | |
2771 | r = -errno; | |
2772 | ||
2773 | if (who == KILL_MAIN || who == KILL_ALL) | |
2774 | if (main_pid > 0) | |
2775 | if (kill(main_pid, signo) < 0) | |
2776 | r = -errno; | |
2777 | ||
4ad49000 | 2778 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
2779 | _cleanup_set_free_ Set *pid_set = NULL; |
2780 | int q; | |
2781 | ||
82659fd7 LP |
2782 | /* Exclude the main/control pids from being killed via the cgroup */ |
2783 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
2784 | if (!pid_set) |
2785 | return -ENOMEM; | |
2786 | ||
4ad49000 | 2787 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
2788 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
2789 | r = q; | |
2790 | } | |
2791 | ||
2792 | return r; | |
2793 | } | |
2794 | ||
6210e7fc LP |
2795 | int unit_following_set(Unit *u, Set **s) { |
2796 | assert(u); | |
2797 | assert(s); | |
2798 | ||
2799 | if (UNIT_VTABLE(u)->following_set) | |
2800 | return UNIT_VTABLE(u)->following_set(u, s); | |
2801 | ||
2802 | *s = NULL; | |
2803 | return 0; | |
2804 | } | |
2805 | ||
a4375746 LP |
2806 | UnitFileState unit_get_unit_file_state(Unit *u) { |
2807 | assert(u); | |
2808 | ||
ac155bb8 MS |
2809 | if (u->unit_file_state < 0 && u->fragment_path) |
2810 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 2811 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 2812 | NULL, basename(u->fragment_path)); |
a4375746 | 2813 | |
ac155bb8 | 2814 | return u->unit_file_state; |
a4375746 LP |
2815 | } |
2816 | ||
57020a3a LP |
2817 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
2818 | assert(ref); | |
2819 | assert(u); | |
2820 | ||
2821 | if (ref->unit) | |
2822 | unit_ref_unset(ref); | |
2823 | ||
2824 | ref->unit = u; | |
71fda00f | 2825 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
2826 | return u; |
2827 | } | |
2828 | ||
2829 | void unit_ref_unset(UnitRef *ref) { | |
2830 | assert(ref); | |
2831 | ||
2832 | if (!ref->unit) | |
2833 | return; | |
2834 | ||
71fda00f | 2835 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
2836 | ref->unit = NULL; |
2837 | } | |
2838 | ||
598459ce LP |
2839 | int unit_patch_contexts(Unit *u) { |
2840 | CGroupContext *cc; | |
2841 | ExecContext *ec; | |
cba6e062 LP |
2842 | unsigned i; |
2843 | int r; | |
2844 | ||
e06c73cc | 2845 | assert(u); |
e06c73cc | 2846 | |
598459ce LP |
2847 | /* Patch in the manager defaults into the exec and cgroup |
2848 | * contexts, _after_ the rest of the settings have been | |
2849 | * initialized */ | |
085afe36 | 2850 | |
598459ce LP |
2851 | ec = unit_get_exec_context(u); |
2852 | if (ec) { | |
2853 | /* This only copies in the ones that need memory */ | |
2854 | for (i = 0; i < _RLIMIT_MAX; i++) | |
2855 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
2856 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
2857 | if (!ec->rlimit[i]) | |
2858 | return -ENOMEM; | |
2859 | } | |
2860 | ||
2861 | if (u->manager->running_as == SYSTEMD_USER && | |
2862 | !ec->working_directory) { | |
2863 | ||
2864 | r = get_home_dir(&ec->working_directory); | |
2865 | if (r < 0) | |
2866 | return r; | |
cba6e062 LP |
2867 | } |
2868 | ||
598459ce LP |
2869 | if (u->manager->running_as == SYSTEMD_USER && |
2870 | (ec->syscall_whitelist || | |
2871 | !set_isempty(ec->syscall_filter) || | |
2872 | !set_isempty(ec->syscall_archs) || | |
2873 | ec->address_families_whitelist || | |
2874 | !set_isempty(ec->address_families))) | |
2875 | ec->no_new_privileges = true; | |
e06c73cc | 2876 | |
598459ce LP |
2877 | if (ec->private_devices) |
2878 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
cba6e062 LP |
2879 | } |
2880 | ||
598459ce LP |
2881 | cc = unit_get_cgroup_context(u); |
2882 | if (cc) { | |
f513e420 | 2883 | |
598459ce LP |
2884 | if (ec && |
2885 | ec->private_devices && | |
2886 | cc->device_policy == CGROUP_AUTO) | |
2887 | cc->device_policy = CGROUP_CLOSED; | |
2888 | } | |
f1660f96 | 2889 | |
cba6e062 | 2890 | return 0; |
e06c73cc LP |
2891 | } |
2892 | ||
3ef63c31 LP |
2893 | ExecContext *unit_get_exec_context(Unit *u) { |
2894 | size_t offset; | |
2895 | assert(u); | |
2896 | ||
598459ce LP |
2897 | if (u->type < 0) |
2898 | return NULL; | |
2899 | ||
3ef63c31 LP |
2900 | offset = UNIT_VTABLE(u)->exec_context_offset; |
2901 | if (offset <= 0) | |
2902 | return NULL; | |
2903 | ||
2904 | return (ExecContext*) ((uint8_t*) u + offset); | |
2905 | } | |
2906 | ||
718db961 LP |
2907 | KillContext *unit_get_kill_context(Unit *u) { |
2908 | size_t offset; | |
2909 | assert(u); | |
2910 | ||
598459ce LP |
2911 | if (u->type < 0) |
2912 | return NULL; | |
2913 | ||
718db961 LP |
2914 | offset = UNIT_VTABLE(u)->kill_context_offset; |
2915 | if (offset <= 0) | |
2916 | return NULL; | |
2917 | ||
2918 | return (KillContext*) ((uint8_t*) u + offset); | |
2919 | } | |
2920 | ||
4ad49000 LP |
2921 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
2922 | size_t offset; | |
2923 | ||
598459ce LP |
2924 | if (u->type < 0) |
2925 | return NULL; | |
2926 | ||
4ad49000 LP |
2927 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
2928 | if (offset <= 0) | |
2929 | return NULL; | |
2930 | ||
2931 | return (CGroupContext*) ((uint8_t*) u + offset); | |
2932 | } | |
2933 | ||
613b411c LP |
2934 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
2935 | size_t offset; | |
2936 | ||
598459ce LP |
2937 | if (u->type < 0) |
2938 | return NULL; | |
2939 | ||
613b411c LP |
2940 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2941 | if (offset <= 0) | |
2942 | return NULL; | |
2943 | ||
2944 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
2945 | } | |
2946 | ||
8e2af478 | 2947 | static int drop_in_file(Unit *u, UnitSetPropertiesMode mode, const char *name, char **_p, char **_q) { |
b9ec9359 | 2948 | _cleanup_free_ char *b = NULL; |
26d04f86 LP |
2949 | char *p, *q; |
2950 | int r; | |
2951 | ||
71645aca | 2952 | assert(u); |
26d04f86 LP |
2953 | assert(name); |
2954 | assert(_p); | |
2955 | assert(_q); | |
71645aca | 2956 | |
b9ec9359 LP |
2957 | b = xescape(name, "/."); |
2958 | if (!b) | |
2959 | return -ENOMEM; | |
2960 | ||
2961 | if (!filename_is_safe(b)) | |
71645aca LP |
2962 | return -EINVAL; |
2963 | ||
26d04f86 LP |
2964 | if (u->manager->running_as == SYSTEMD_USER) { |
2965 | _cleanup_free_ char *c = NULL; | |
2966 | ||
2967 | r = user_config_home(&c); | |
2968 | if (r < 0) | |
2969 | return r; | |
2970 | if (r == 0) | |
2971 | return -ENOENT; | |
2972 | ||
2973 | p = strjoin(c, "/", u->id, ".d", NULL); | |
6d235724 | 2974 | } else if (mode == UNIT_PERSISTENT && !u->transient) |
26d04f86 | 2975 | p = strjoin("/etc/systemd/system/", u->id, ".d", NULL); |
8e2af478 LP |
2976 | else |
2977 | p = strjoin("/run/systemd/system/", u->id, ".d", NULL); | |
71645aca LP |
2978 | if (!p) |
2979 | return -ENOMEM; | |
2980 | ||
b9ec9359 | 2981 | q = strjoin(p, "/90-", b, ".conf", NULL); |
26d04f86 LP |
2982 | if (!q) { |
2983 | free(p); | |
71645aca | 2984 | return -ENOMEM; |
26d04f86 | 2985 | } |
71645aca | 2986 | |
26d04f86 LP |
2987 | *_p = p; |
2988 | *_q = q; | |
2989 | return 0; | |
71645aca LP |
2990 | } |
2991 | ||
8e2af478 | 2992 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
71645aca | 2993 | _cleanup_free_ char *p = NULL, *q = NULL; |
26d04f86 | 2994 | int r; |
71645aca LP |
2995 | |
2996 | assert(u); | |
b42defe3 LP |
2997 | assert(name); |
2998 | assert(data); | |
71645aca | 2999 | |
6d235724 | 3000 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3001 | return 0; |
3002 | ||
3003 | r = drop_in_file(u, mode, name, &p, &q); | |
26d04f86 LP |
3004 | if (r < 0) |
3005 | return r; | |
71645aca | 3006 | |
26d04f86 | 3007 | mkdir_p(p, 0755); |
574d5f2d | 3008 | return write_string_file_atomic_label(q, data); |
26d04f86 | 3009 | } |
71645aca | 3010 | |
b9ec9359 LP |
3011 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3012 | _cleanup_free_ char *p = NULL; | |
3013 | va_list ap; | |
3014 | int r; | |
3015 | ||
3016 | assert(u); | |
3017 | assert(name); | |
3018 | assert(format); | |
3019 | ||
6d235724 | 3020 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3021 | return 0; |
3022 | ||
3023 | va_start(ap, format); | |
3024 | r = vasprintf(&p, format, ap); | |
3025 | va_end(ap); | |
3026 | ||
3027 | if (r < 0) | |
3028 | return -ENOMEM; | |
3029 | ||
3030 | return unit_write_drop_in(u, mode, name, p); | |
3031 | } | |
3032 | ||
3033 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
3034 | _cleanup_free_ char *ndata = NULL; |
3035 | ||
3036 | assert(u); | |
3037 | assert(name); | |
3038 | assert(data); | |
3039 | ||
3040 | if (!UNIT_VTABLE(u)->private_section) | |
3041 | return -EINVAL; | |
3042 | ||
6d235724 | 3043 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3044 | return 0; |
3045 | ||
b42defe3 LP |
3046 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
3047 | if (!ndata) | |
3048 | return -ENOMEM; | |
3049 | ||
3050 | return unit_write_drop_in(u, mode, name, ndata); | |
3051 | } | |
3052 | ||
b9ec9359 LP |
3053 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3054 | _cleanup_free_ char *p = NULL; | |
3055 | va_list ap; | |
3056 | int r; | |
3057 | ||
3058 | assert(u); | |
3059 | assert(name); | |
3060 | assert(format); | |
3061 | ||
6d235724 | 3062 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3063 | return 0; |
3064 | ||
3065 | va_start(ap, format); | |
3066 | r = vasprintf(&p, format, ap); | |
3067 | va_end(ap); | |
3068 | ||
3069 | if (r < 0) | |
3070 | return -ENOMEM; | |
3071 | ||
3072 | return unit_write_drop_in_private(u, mode, name, p); | |
3073 | } | |
3074 | ||
8e2af478 | 3075 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
3076 | _cleanup_free_ char *p = NULL, *q = NULL; |
3077 | int r; | |
71645aca | 3078 | |
26d04f86 | 3079 | assert(u); |
71645aca | 3080 | |
6d235724 | 3081 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3082 | return 0; |
3083 | ||
3084 | r = drop_in_file(u, mode, name, &p, &q); | |
6891529f ZJS |
3085 | if (r < 0) |
3086 | return r; | |
3087 | ||
71645aca | 3088 | if (unlink(q) < 0) |
241da328 | 3089 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 3090 | else |
241da328 | 3091 | r = 1; |
71645aca LP |
3092 | |
3093 | rmdir(p); | |
26d04f86 | 3094 | return r; |
71645aca LP |
3095 | } |
3096 | ||
c2756a68 LP |
3097 | int unit_make_transient(Unit *u) { |
3098 | int r; | |
3099 | ||
3100 | assert(u); | |
3101 | ||
3102 | u->load_state = UNIT_STUB; | |
3103 | u->load_error = 0; | |
3104 | u->transient = true; | |
3105 | ||
3106 | free(u->fragment_path); | |
3107 | u->fragment_path = NULL; | |
3108 | ||
3109 | if (u->manager->running_as == SYSTEMD_USER) { | |
3110 | _cleanup_free_ char *c = NULL; | |
3111 | ||
3112 | r = user_config_home(&c); | |
3113 | if (r < 0) | |
3114 | return r; | |
3115 | if (r == 0) | |
3116 | return -ENOENT; | |
3117 | ||
3118 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
3119 | if (!u->fragment_path) | |
3120 | return -ENOMEM; | |
3121 | ||
3122 | mkdir_p(c, 0755); | |
3123 | } else { | |
3124 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
3125 | if (!u->fragment_path) | |
3126 | return -ENOMEM; | |
3127 | ||
3128 | mkdir_p("/run/systemd/system", 0755); | |
3129 | } | |
3130 | ||
3131 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
3132 | } | |
3133 | ||
cd2086fe LP |
3134 | int unit_kill_context( |
3135 | Unit *u, | |
3136 | KillContext *c, | |
3137 | bool sigkill, | |
3138 | pid_t main_pid, | |
3139 | pid_t control_pid, | |
3140 | bool main_pid_alien) { | |
3141 | ||
bc6aed7b | 3142 | int sig, wait_for_exit = false, r; |
cd2086fe LP |
3143 | |
3144 | assert(u); | |
3145 | assert(c); | |
3146 | ||
3147 | if (c->kill_mode == KILL_NONE) | |
3148 | return 0; | |
3149 | ||
3150 | sig = sigkill ? SIGKILL : c->kill_signal; | |
3151 | ||
3152 | if (main_pid > 0) { | |
3153 | r = kill_and_sigcont(main_pid, sig); | |
3154 | ||
3155 | if (r < 0 && r != -ESRCH) { | |
3156 | _cleanup_free_ char *comm = NULL; | |
3157 | get_process_comm(main_pid, &comm); | |
3158 | ||
6294b8a9 | 3159 | log_warning_unit(u->id, "Failed to kill main process " PID_FMT " (%s): %s", main_pid, strna(comm), strerror(-r)); |
82659fd7 | 3160 | } else { |
bc6aed7b LP |
3161 | if (!main_pid_alien) |
3162 | wait_for_exit = true; | |
82659fd7 | 3163 | |
97e0691f | 3164 | if (c->send_sighup && !sigkill) |
82659fd7 LP |
3165 | kill(main_pid, SIGHUP); |
3166 | } | |
cd2086fe LP |
3167 | } |
3168 | ||
3169 | if (control_pid > 0) { | |
3170 | r = kill_and_sigcont(control_pid, sig); | |
3171 | ||
3172 | if (r < 0 && r != -ESRCH) { | |
3173 | _cleanup_free_ char *comm = NULL; | |
3174 | get_process_comm(control_pid, &comm); | |
3175 | ||
6294b8a9 | 3176 | log_warning_unit(u->id, "Failed to kill control process " PID_FMT " (%s): %s", control_pid, strna(comm), strerror(-r)); |
82659fd7 | 3177 | } else { |
cd2086fe | 3178 | wait_for_exit = true; |
82659fd7 | 3179 | |
97e0691f | 3180 | if (c->send_sighup && !sigkill) |
82659fd7 LP |
3181 | kill(control_pid, SIGHUP); |
3182 | } | |
cd2086fe LP |
3183 | } |
3184 | ||
58ea275a | 3185 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && sigkill)) && u->cgroup_path) { |
cd2086fe LP |
3186 | _cleanup_set_free_ Set *pid_set = NULL; |
3187 | ||
82659fd7 LP |
3188 | /* Exclude the main/control pids from being killed via the cgroup */ |
3189 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3190 | if (!pid_set) |
3191 | return -ENOMEM; | |
3192 | ||
4ad49000 | 3193 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
3194 | if (r < 0) { |
3195 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
3196 | log_warning_unit(u->id, "Failed to kill control group: %s", strerror(-r)); | |
82659fd7 | 3197 | } else if (r > 0) { |
bc6aed7b | 3198 | |
743970d2 LP |
3199 | /* FIXME: For now, we will not wait for the |
3200 | * cgroup members to die, simply because | |
3201 | * cgroup notification is unreliable. It | |
3202 | * doesn't work at all in containers, and | |
3203 | * outside of containers it can be confused | |
3204 | * easily by leaving directories in the | |
3205 | * cgroup. */ | |
3206 | ||
3207 | /* wait_for_exit = true; */ | |
58ea275a | 3208 | |
97e0691f | 3209 | if (c->send_sighup && !sigkill) { |
82659fd7 LP |
3210 | set_free(pid_set); |
3211 | ||
3212 | pid_set = unit_pid_set(main_pid, control_pid); | |
3213 | if (!pid_set) | |
3214 | return -ENOMEM; | |
3215 | ||
8190da36 | 3216 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3217 | } |
3218 | } | |
cd2086fe LP |
3219 | } |
3220 | ||
3221 | return wait_for_exit; | |
3222 | } | |
3223 | ||
a57f7e2c LP |
3224 | int unit_require_mounts_for(Unit *u, const char *path) { |
3225 | char prefix[strlen(path) + 1], *p; | |
3226 | int r; | |
3227 | ||
3228 | assert(u); | |
3229 | assert(path); | |
3230 | ||
3231 | /* Registers a unit for requiring a certain path and all its | |
3232 | * prefixes. We keep a simple array of these paths in the | |
3233 | * unit, since its usually short. However, we build a prefix | |
3234 | * table for all possible prefixes so that new appearing mount | |
3235 | * units can easily determine which units to make themselves a | |
3236 | * dependency of. */ | |
3237 | ||
70b64bd3 ZJS |
3238 | if (!path_is_absolute(path)) |
3239 | return -EINVAL; | |
3240 | ||
a57f7e2c LP |
3241 | p = strdup(path); |
3242 | if (!p) | |
3243 | return -ENOMEM; | |
3244 | ||
3245 | path_kill_slashes(p); | |
3246 | ||
a57f7e2c LP |
3247 | if (!path_is_safe(p)) { |
3248 | free(p); | |
3249 | return -EPERM; | |
3250 | } | |
3251 | ||
3252 | if (strv_contains(u->requires_mounts_for, p)) { | |
3253 | free(p); | |
3254 | return 0; | |
3255 | } | |
3256 | ||
6e18964d ZJS |
3257 | r = strv_consume(&u->requires_mounts_for, p); |
3258 | if (r < 0) | |
a57f7e2c | 3259 | return r; |
a57f7e2c LP |
3260 | |
3261 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3262 | Set *x; | |
3263 | ||
3264 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3265 | if (!x) { | |
3266 | char *q; | |
3267 | ||
3268 | if (!u->manager->units_requiring_mounts_for) { | |
3269 | u->manager->units_requiring_mounts_for = hashmap_new(string_hash_func, string_compare_func); | |
3270 | if (!u->manager->units_requiring_mounts_for) | |
3271 | return -ENOMEM; | |
3272 | } | |
3273 | ||
3274 | q = strdup(prefix); | |
3275 | if (!q) | |
3276 | return -ENOMEM; | |
3277 | ||
3278 | x = set_new(NULL, NULL); | |
3279 | if (!x) { | |
3280 | free(q); | |
3281 | return -ENOMEM; | |
3282 | } | |
3283 | ||
3284 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3285 | if (r < 0) { | |
3286 | free(q); | |
3287 | set_free(x); | |
3288 | return r; | |
3289 | } | |
3290 | } | |
3291 | ||
3292 | r = set_put(x, u); | |
3293 | if (r < 0) | |
3294 | return r; | |
3295 | } | |
3296 | ||
3297 | return 0; | |
3298 | } | |
3299 | ||
613b411c LP |
3300 | int unit_setup_exec_runtime(Unit *u) { |
3301 | ExecRuntime **rt; | |
3302 | size_t offset; | |
3303 | Iterator i; | |
3304 | Unit *other; | |
3305 | ||
3306 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3307 | assert(offset > 0); | |
3308 | ||
3309 | /* Check if ther already is an ExecRuntime for this unit? */ | |
3310 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
3311 | if (*rt) | |
3312 | return 0; | |
3313 | ||
3314 | /* Try to get it from somebody else */ | |
3315 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3316 | ||
3317 | *rt = unit_get_exec_runtime(other); | |
3318 | if (*rt) { | |
3319 | exec_runtime_ref(*rt); | |
3320 | return 0; | |
3321 | } | |
3322 | } | |
3323 | ||
3324 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3325 | } | |
3326 | ||
94f04347 LP |
3327 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3328 | [UNIT_ACTIVE] = "active", | |
032ff4af | 3329 | [UNIT_RELOADING] = "reloading", |
94f04347 | 3330 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 3331 | [UNIT_FAILED] = "failed", |
94f04347 LP |
3332 | [UNIT_ACTIVATING] = "activating", |
3333 | [UNIT_DEACTIVATING] = "deactivating" | |
3334 | }; | |
3335 | ||
3336 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
3337 | ||
3338 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
3339 | [UNIT_REQUIRES] = "Requires", | |
9e2f7c11 | 3340 | [UNIT_REQUIRES_OVERRIDABLE] = "RequiresOverridable", |
94f04347 | 3341 | [UNIT_REQUISITE] = "Requisite", |
9e2f7c11 | 3342 | [UNIT_REQUISITE_OVERRIDABLE] = "RequisiteOverridable", |
ac6a4abe MS |
3343 | [UNIT_WANTS] = "Wants", |
3344 | [UNIT_BINDS_TO] = "BindsTo", | |
3345 | [UNIT_PART_OF] = "PartOf", | |
94f04347 | 3346 | [UNIT_REQUIRED_BY] = "RequiredBy", |
9e2f7c11 | 3347 | [UNIT_REQUIRED_BY_OVERRIDABLE] = "RequiredByOverridable", |
94f04347 | 3348 | [UNIT_WANTED_BY] = "WantedBy", |
ac6a4abe MS |
3349 | [UNIT_BOUND_BY] = "BoundBy", |
3350 | [UNIT_CONSISTS_OF] = "ConsistsOf", | |
94f04347 | 3351 | [UNIT_CONFLICTS] = "Conflicts", |
69dd2852 | 3352 | [UNIT_CONFLICTED_BY] = "ConflictedBy", |
94f04347 LP |
3353 | [UNIT_BEFORE] = "Before", |
3354 | [UNIT_AFTER] = "After", | |
57020a3a LP |
3355 | [UNIT_ON_FAILURE] = "OnFailure", |
3356 | [UNIT_TRIGGERS] = "Triggers", | |
4dcc1cb4 | 3357 | [UNIT_TRIGGERED_BY] = "TriggeredBy", |
7f2cddae | 3358 | [UNIT_PROPAGATES_RELOAD_TO] = "PropagatesReloadTo", |
ac6a4abe | 3359 | [UNIT_RELOAD_PROPAGATED_FROM] = "ReloadPropagatedFrom", |
2c5859af | 3360 | [UNIT_JOINS_NAMESPACE_OF] = "JoinsNamespaceOf", |
ac6a4abe MS |
3361 | [UNIT_REFERENCES] = "References", |
3362 | [UNIT_REFERENCED_BY] = "ReferencedBy", | |
94f04347 LP |
3363 | }; |
3364 | ||
3365 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); |