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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" |
29686440 | 54 | #include "dropin.h" |
87f0e418 LP |
55 | |
56 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
57 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 58 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 59 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 | 60 | [UNIT_TARGET] = &target_vtable, |
e821075a | 61 | [UNIT_SNAPSHOT] = &snapshot_vtable, |
87f0e418 LP |
62 | [UNIT_DEVICE] = &device_vtable, |
63 | [UNIT_MOUNT] = &mount_vtable, | |
64 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 65 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 66 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 67 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
68 | [UNIT_SLICE] = &slice_vtable, |
69 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
70 | }; |
71 | ||
d1fab3fe ZJS |
72 | static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency); |
73 | ||
7d17cfbc | 74 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
75 | Unit *u; |
76 | ||
77 | assert(m); | |
ac155bb8 | 78 | assert(size >= sizeof(Unit)); |
87f0e418 | 79 | |
7d17cfbc MS |
80 | u = malloc0(size); |
81 | if (!u) | |
87f0e418 LP |
82 | return NULL; |
83 | ||
d5099efc | 84 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 85 | if (!u->names) { |
87f0e418 LP |
86 | free(u); |
87 | return NULL; | |
88 | } | |
89 | ||
ac155bb8 MS |
90 | u->manager = m; |
91 | u->type = _UNIT_TYPE_INVALID; | |
92 | u->deserialized_job = _JOB_TYPE_INVALID; | |
93 | u->default_dependencies = true; | |
94 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d420282b | 95 | u->on_failure_job_mode = JOB_REPLACE; |
87f0e418 LP |
96 | |
97 | return u; | |
98 | } | |
99 | ||
f278026d LP |
100 | bool unit_has_name(Unit *u, const char *name) { |
101 | assert(u); | |
102 | assert(name); | |
103 | ||
ac155bb8 | 104 | return !!set_get(u->names, (char*) name); |
f278026d LP |
105 | } |
106 | ||
598459ce LP |
107 | static void unit_init(Unit *u) { |
108 | CGroupContext *cc; | |
109 | ExecContext *ec; | |
110 | KillContext *kc; | |
111 | ||
112 | assert(u); | |
113 | assert(u->manager); | |
114 | assert(u->type >= 0); | |
115 | ||
116 | cc = unit_get_cgroup_context(u); | |
117 | if (cc) { | |
118 | cgroup_context_init(cc); | |
119 | ||
120 | /* Copy in the manager defaults into the cgroup | |
121 | * context, _before_ the rest of the settings have | |
122 | * been initialized */ | |
123 | ||
124 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
125 | cc->blockio_accounting = u->manager->default_blockio_accounting; | |
126 | cc->memory_accounting = u->manager->default_memory_accounting; | |
127 | } | |
128 | ||
129 | ec = unit_get_exec_context(u); | |
130 | if (ec) | |
131 | exec_context_init(ec); | |
132 | ||
133 | kc = unit_get_kill_context(u); | |
134 | if (kc) | |
135 | kill_context_init(kc); | |
136 | ||
137 | if (UNIT_VTABLE(u)->init) | |
138 | UNIT_VTABLE(u)->init(u); | |
139 | } | |
140 | ||
87f0e418 | 141 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 142 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 143 | UnitType t; |
87f0e418 LP |
144 | int r; |
145 | ||
146 | assert(u); | |
147 | assert(text); | |
148 | ||
9e2f7c11 | 149 | if (unit_name_is_template(text)) { |
598459ce | 150 | |
ac155bb8 | 151 | if (!u->instance) |
9e2f7c11 | 152 | return -EINVAL; |
87f0e418 | 153 | |
ac155bb8 | 154 | s = unit_name_replace_instance(text, u->instance); |
9e2f7c11 LP |
155 | } else |
156 | s = strdup(text); | |
9e2f7c11 LP |
157 | if (!s) |
158 | return -ENOMEM; | |
87f0e418 | 159 | |
598459ce LP |
160 | if (!unit_name_is_valid(s, TEMPLATE_INVALID)) |
161 | return -EINVAL; | |
e537352b | 162 | |
9e2f7c11 | 163 | assert_se((t = unit_name_to_type(s)) >= 0); |
87f0e418 | 164 | |
598459ce LP |
165 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
166 | return -EINVAL; | |
87f0e418 | 167 | |
e48614c4 ZJS |
168 | r = unit_name_to_instance(s, &i); |
169 | if (r < 0) | |
598459ce | 170 | return r; |
87f0e418 | 171 | |
598459ce LP |
172 | if (i && unit_vtable[t]->no_instances) |
173 | return -EINVAL; | |
9e2f7c11 | 174 | |
276c3e78 LP |
175 | /* Ensure that this unit is either instanced or not instanced, |
176 | * but not both. */ | |
598459ce LP |
177 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
178 | return -EINVAL; | |
9e2f7c11 LP |
179 | |
180 | if (unit_vtable[t]->no_alias && | |
ac155bb8 | 181 | !set_isempty(u->names) && |
598459ce LP |
182 | !set_get(u->names, s)) |
183 | return -EEXIST; | |
9e2f7c11 | 184 | |
598459ce LP |
185 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
186 | return -E2BIG; | |
4f0f902f | 187 | |
e48614c4 ZJS |
188 | r = set_put(u->names, s); |
189 | if (r < 0) { | |
9e2f7c11 | 190 | if (r == -EEXIST) |
598459ce LP |
191 | return 0; |
192 | ||
193 | return r; | |
87f0e418 LP |
194 | } |
195 | ||
e48614c4 ZJS |
196 | r = hashmap_put(u->manager->units, s, u); |
197 | if (r < 0) { | |
ac155bb8 | 198 | set_remove(u->names, s); |
598459ce | 199 | return r; |
87f0e418 LP |
200 | } |
201 | ||
ac155bb8 | 202 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
203 | u->type = t; |
204 | u->id = s; | |
205 | u->instance = i; | |
9e2f7c11 | 206 | |
71fda00f | 207 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 208 | |
598459ce | 209 | unit_init(u); |
87f0e418 | 210 | |
598459ce LP |
211 | i = NULL; |
212 | } | |
9e2f7c11 | 213 | |
598459ce | 214 | s = NULL; |
9e2f7c11 | 215 | |
598459ce LP |
216 | unit_add_to_dbus_queue(u); |
217 | return 0; | |
87f0e418 LP |
218 | } |
219 | ||
0ae97ec1 | 220 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 221 | _cleanup_free_ char *t = NULL; |
598459ce | 222 | char *s, *i; |
276c3e78 | 223 | int r; |
0ae97ec1 LP |
224 | |
225 | assert(u); | |
226 | assert(name); | |
227 | ||
9e2f7c11 LP |
228 | if (unit_name_is_template(name)) { |
229 | ||
ac155bb8 | 230 | if (!u->instance) |
9e2f7c11 LP |
231 | return -EINVAL; |
232 | ||
e48614c4 ZJS |
233 | t = unit_name_replace_instance(name, u->instance); |
234 | if (!t) | |
9e2f7c11 LP |
235 | return -ENOMEM; |
236 | ||
237 | name = t; | |
238 | } | |
239 | ||
0ae97ec1 | 240 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 241 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 242 | if (!s) |
0ae97ec1 LP |
243 | return -ENOENT; |
244 | ||
e48614c4 ZJS |
245 | r = unit_name_to_instance(s, &i); |
246 | if (r < 0) | |
276c3e78 LP |
247 | return r; |
248 | ||
ac155bb8 | 249 | u->id = s; |
276c3e78 | 250 | |
ac155bb8 MS |
251 | free(u->instance); |
252 | u->instance = i; | |
276c3e78 | 253 | |
c1e1601e | 254 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 255 | |
0ae97ec1 LP |
256 | return 0; |
257 | } | |
258 | ||
f50e0a01 LP |
259 | int unit_set_description(Unit *u, const char *description) { |
260 | char *s; | |
261 | ||
262 | assert(u); | |
263 | ||
8aec412f LP |
264 | if (isempty(description)) |
265 | s = NULL; | |
266 | else { | |
267 | s = strdup(description); | |
268 | if (!s) | |
269 | return -ENOMEM; | |
270 | } | |
f50e0a01 | 271 | |
ac155bb8 MS |
272 | free(u->description); |
273 | u->description = s; | |
c1e1601e LP |
274 | |
275 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
276 | return 0; |
277 | } | |
278 | ||
701cc384 LP |
279 | bool unit_check_gc(Unit *u) { |
280 | assert(u); | |
281 | ||
282 | if (UNIT_VTABLE(u)->no_gc) | |
283 | return true; | |
284 | ||
ac155bb8 | 285 | if (u->no_gc) |
6c073082 LP |
286 | return true; |
287 | ||
ac155bb8 | 288 | if (u->job) |
701cc384 LP |
289 | return true; |
290 | ||
e0209d83 MS |
291 | if (u->nop_job) |
292 | return true; | |
293 | ||
701cc384 LP |
294 | if (unit_active_state(u) != UNIT_INACTIVE) |
295 | return true; | |
296 | ||
9d576438 LP |
297 | if (u->refs) |
298 | return true; | |
299 | ||
701cc384 LP |
300 | if (UNIT_VTABLE(u)->check_gc) |
301 | if (UNIT_VTABLE(u)->check_gc(u)) | |
302 | return true; | |
303 | ||
304 | return false; | |
305 | } | |
306 | ||
87f0e418 LP |
307 | void unit_add_to_load_queue(Unit *u) { |
308 | assert(u); | |
ac155bb8 | 309 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 310 | |
ac155bb8 | 311 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
312 | return; |
313 | ||
71fda00f | 314 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 315 | u->in_load_queue = true; |
87f0e418 LP |
316 | } |
317 | ||
23a177ef LP |
318 | void unit_add_to_cleanup_queue(Unit *u) { |
319 | assert(u); | |
320 | ||
ac155bb8 | 321 | if (u->in_cleanup_queue) |
23a177ef LP |
322 | return; |
323 | ||
71fda00f | 324 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 325 | u->in_cleanup_queue = true; |
23a177ef LP |
326 | } |
327 | ||
701cc384 LP |
328 | void unit_add_to_gc_queue(Unit *u) { |
329 | assert(u); | |
330 | ||
ac155bb8 | 331 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
332 | return; |
333 | ||
334 | if (unit_check_gc(u)) | |
335 | return; | |
336 | ||
71fda00f | 337 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 338 | u->in_gc_queue = true; |
701cc384 | 339 | |
ac155bb8 | 340 | u->manager->n_in_gc_queue ++; |
701cc384 LP |
341 | } |
342 | ||
c1e1601e LP |
343 | void unit_add_to_dbus_queue(Unit *u) { |
344 | assert(u); | |
ac155bb8 | 345 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 346 | |
ac155bb8 | 347 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
348 | return; |
349 | ||
a567261a | 350 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
351 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
352 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 353 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
354 | return; |
355 | } | |
356 | ||
71fda00f | 357 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 358 | u->in_dbus_queue = true; |
c1e1601e LP |
359 | } |
360 | ||
87f0e418 LP |
361 | static void bidi_set_free(Unit *u, Set *s) { |
362 | Iterator i; | |
363 | Unit *other; | |
364 | ||
365 | assert(u); | |
366 | ||
367 | /* Frees the set and makes sure we are dropped from the | |
368 | * inverse pointers */ | |
369 | ||
370 | SET_FOREACH(other, s, i) { | |
371 | UnitDependency d; | |
372 | ||
373 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 374 | set_remove(other->dependencies[d], u); |
701cc384 LP |
375 | |
376 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
377 | } |
378 | ||
379 | set_free(s); | |
380 | } | |
381 | ||
c2756a68 LP |
382 | static void unit_remove_transient(Unit *u) { |
383 | char **i; | |
384 | ||
385 | assert(u); | |
386 | ||
387 | if (!u->transient) | |
388 | return; | |
389 | ||
390 | if (u->fragment_path) | |
391 | unlink(u->fragment_path); | |
392 | ||
393 | STRV_FOREACH(i, u->dropin_paths) { | |
394 | _cleanup_free_ char *p = NULL; | |
395 | int r; | |
396 | ||
397 | unlink(*i); | |
398 | ||
399 | r = path_get_parent(*i, &p); | |
400 | if (r >= 0) | |
401 | rmdir(p); | |
402 | } | |
403 | } | |
404 | ||
a57f7e2c LP |
405 | static void unit_free_requires_mounts_for(Unit *u) { |
406 | char **j; | |
407 | ||
408 | STRV_FOREACH(j, u->requires_mounts_for) { | |
409 | char s[strlen(*j) + 1]; | |
410 | ||
411 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
412 | char *y; | |
413 | Set *x; | |
414 | ||
415 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
416 | if (!x) | |
417 | continue; | |
418 | ||
419 | set_remove(x, u); | |
420 | ||
421 | if (set_isempty(x)) { | |
422 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
423 | free(y); | |
424 | set_free(x); | |
425 | } | |
426 | } | |
427 | } | |
428 | ||
429 | strv_free(u->requires_mounts_for); | |
430 | u->requires_mounts_for = NULL; | |
431 | } | |
432 | ||
598459ce LP |
433 | static void unit_done(Unit *u) { |
434 | ExecContext *ec; | |
435 | CGroupContext *cc; | |
436 | ||
437 | assert(u); | |
438 | ||
439 | if (u->type < 0) | |
440 | return; | |
441 | ||
442 | if (UNIT_VTABLE(u)->done) | |
443 | UNIT_VTABLE(u)->done(u); | |
444 | ||
445 | ec = unit_get_exec_context(u); | |
446 | if (ec) | |
447 | exec_context_done(ec); | |
448 | ||
449 | cc = unit_get_cgroup_context(u); | |
450 | if (cc) | |
451 | cgroup_context_done(cc); | |
452 | } | |
453 | ||
87f0e418 LP |
454 | void unit_free(Unit *u) { |
455 | UnitDependency d; | |
456 | Iterator i; | |
457 | char *t; | |
458 | ||
459 | assert(u); | |
460 | ||
c2756a68 LP |
461 | if (u->manager->n_reloading <= 0) |
462 | unit_remove_transient(u); | |
463 | ||
c1e1601e LP |
464 | bus_unit_send_removed_signal(u); |
465 | ||
598459ce | 466 | unit_done(u); |
a013b84b | 467 | |
a57f7e2c LP |
468 | unit_free_requires_mounts_for(u); |
469 | ||
ac155bb8 MS |
470 | SET_FOREACH(t, u->names, i) |
471 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 472 | |
97e7d748 MS |
473 | if (u->job) { |
474 | Job *j = u->job; | |
475 | job_uninstall(j); | |
476 | job_free(j); | |
477 | } | |
964e0949 | 478 | |
e0209d83 MS |
479 | if (u->nop_job) { |
480 | Job *j = u->nop_job; | |
481 | job_uninstall(j); | |
482 | job_free(j); | |
483 | } | |
484 | ||
964e0949 | 485 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 486 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 487 | |
ac155bb8 | 488 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 489 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 490 | |
ac155bb8 | 491 | if (u->in_load_queue) |
71fda00f | 492 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 493 | |
ac155bb8 | 494 | if (u->in_dbus_queue) |
71fda00f | 495 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 496 | |
ac155bb8 | 497 | if (u->in_cleanup_queue) |
71fda00f | 498 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 499 | |
ac155bb8 | 500 | if (u->in_gc_queue) { |
71fda00f | 501 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 502 | u->manager->n_in_gc_queue--; |
701cc384 LP |
503 | } |
504 | ||
4ad49000 | 505 | if (u->in_cgroup_queue) |
71fda00f | 506 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 507 | |
72673e86 LP |
508 | if (u->cgroup_path) { |
509 | hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
510 | free(u->cgroup_path); | |
511 | } | |
512 | ||
f755e3b7 | 513 | set_remove(u->manager->failed_units, u); |
db785129 | 514 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 515 | |
ac155bb8 | 516 | free(u->description); |
49dbfa7b | 517 | strv_free(u->documentation); |
ac155bb8 | 518 | free(u->fragment_path); |
1b64d026 | 519 | free(u->source_path); |
ae7a7182 | 520 | strv_free(u->dropin_paths); |
ac155bb8 | 521 | free(u->instance); |
87f0e418 | 522 | |
f189ab18 LP |
523 | free(u->job_timeout_reboot_arg); |
524 | ||
ac155bb8 | 525 | set_free_free(u->names); |
87f0e418 | 526 | |
a911bb9a LP |
527 | unit_unwatch_all_pids(u); |
528 | ||
ac155bb8 | 529 | condition_free_list(u->conditions); |
59fccdc5 | 530 | condition_free_list(u->asserts); |
52661efd | 531 | |
702a2d8f LP |
532 | unit_ref_unset(&u->slice); |
533 | ||
ac155bb8 MS |
534 | while (u->refs) |
535 | unit_ref_unset(u->refs); | |
57020a3a | 536 | |
87f0e418 LP |
537 | free(u); |
538 | } | |
539 | ||
540 | UnitActiveState unit_active_state(Unit *u) { | |
541 | assert(u); | |
542 | ||
ac155bb8 | 543 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
544 | return unit_active_state(unit_follow_merge(u)); |
545 | ||
546 | /* After a reload it might happen that a unit is not correctly | |
547 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 548 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
549 | |
550 | return UNIT_VTABLE(u)->active_state(u); | |
551 | } | |
552 | ||
10a94420 LP |
553 | const char* unit_sub_state_to_string(Unit *u) { |
554 | assert(u); | |
555 | ||
556 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
557 | } | |
558 | ||
7c0b05e5 MS |
559 | static int complete_move(Set **s, Set **other) { |
560 | int r; | |
561 | ||
23a177ef LP |
562 | assert(s); |
563 | assert(other); | |
87f0e418 | 564 | |
23a177ef | 565 | if (!*other) |
7c0b05e5 | 566 | return 0; |
87f0e418 | 567 | |
7c0b05e5 MS |
568 | if (*s) { |
569 | r = set_move(*s, *other); | |
570 | if (r < 0) | |
571 | return r; | |
572 | } else { | |
23a177ef LP |
573 | *s = *other; |
574 | *other = NULL; | |
575 | } | |
7c0b05e5 MS |
576 | |
577 | return 0; | |
23a177ef | 578 | } |
87f0e418 | 579 | |
7c0b05e5 | 580 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
581 | char *t; |
582 | Iterator i; | |
7c0b05e5 | 583 | int r; |
87f0e418 | 584 | |
23a177ef LP |
585 | assert(u); |
586 | assert(other); | |
587 | ||
7c0b05e5 MS |
588 | r = complete_move(&u->names, &other->names); |
589 | if (r < 0) | |
590 | return r; | |
23a177ef | 591 | |
ac155bb8 MS |
592 | set_free_free(other->names); |
593 | other->names = NULL; | |
594 | other->id = NULL; | |
23a177ef | 595 | |
ac155bb8 MS |
596 | SET_FOREACH(t, u->names, i) |
597 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
598 | |
599 | return 0; | |
87f0e418 LP |
600 | } |
601 | ||
09a65f92 MS |
602 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
603 | unsigned n_reserve; | |
604 | ||
605 | assert(u); | |
606 | assert(other); | |
607 | assert(d < _UNIT_DEPENDENCY_MAX); | |
608 | ||
609 | /* | |
610 | * If u does not have this dependency set allocated, there is no need | |
611 | * to reserve anything. In that case other's set will be transfered | |
612 | * as a whole to u by complete_move(). | |
613 | */ | |
614 | if (!u->dependencies[d]) | |
615 | return 0; | |
616 | ||
617 | /* merge_dependencies() will skip a u-on-u dependency */ | |
618 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
619 | ||
620 | return set_reserve(u->dependencies[d], n_reserve); | |
621 | } | |
622 | ||
d1fab3fe | 623 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
624 | Iterator i; |
625 | Unit *back; | |
87f0e418 | 626 | int r; |
23a177ef LP |
627 | |
628 | assert(u); | |
629 | assert(other); | |
630 | assert(d < _UNIT_DEPENDENCY_MAX); | |
631 | ||
83a95334 | 632 | /* Fix backwards pointers */ |
ac155bb8 | 633 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
634 | UnitDependency k; |
635 | ||
e48614c4 | 636 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
637 | /* Do not add dependencies between u and itself */ |
638 | if (back == u) { | |
d1fab3fe ZJS |
639 | if (set_remove(back->dependencies[k], other)) |
640 | maybe_warn_about_dependency(u->id, other_id, k); | |
e66047ff ZJS |
641 | } else { |
642 | r = set_remove_and_put(back->dependencies[k], other, u); | |
643 | if (r == -EEXIST) | |
644 | set_remove(back->dependencies[k], other); | |
645 | else | |
646 | assert(r >= 0 || r == -ENOENT); | |
647 | } | |
e48614c4 | 648 | } |
23a177ef LP |
649 | } |
650 | ||
e66047ff | 651 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
652 | back = set_remove(other->dependencies[d], u); |
653 | if (back) | |
654 | maybe_warn_about_dependency(u->id, other_id, d); | |
e66047ff | 655 | |
7c0b05e5 MS |
656 | /* The move cannot fail. The caller must have performed a reservation. */ |
657 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 658 | |
ac155bb8 MS |
659 | set_free(other->dependencies[d]); |
660 | other->dependencies[d] = NULL; | |
23a177ef LP |
661 | } |
662 | ||
663 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 664 | UnitDependency d; |
d1fab3fe | 665 | const char *other_id = NULL; |
09a65f92 | 666 | int r; |
87f0e418 LP |
667 | |
668 | assert(u); | |
669 | assert(other); | |
ac155bb8 MS |
670 | assert(u->manager == other->manager); |
671 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 672 | |
cc916967 LP |
673 | other = unit_follow_merge(other); |
674 | ||
23a177ef LP |
675 | if (other == u) |
676 | return 0; | |
677 | ||
ac155bb8 | 678 | if (u->type != other->type) |
9e2f7c11 LP |
679 | return -EINVAL; |
680 | ||
ac155bb8 | 681 | if (!u->instance != !other->instance) |
87f0e418 LP |
682 | return -EINVAL; |
683 | ||
ac155bb8 | 684 | if (other->load_state != UNIT_STUB && |
c2756a68 | 685 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 686 | return -EEXIST; |
87f0e418 | 687 | |
ac155bb8 | 688 | if (other->job) |
819e213f LP |
689 | return -EEXIST; |
690 | ||
e0209d83 MS |
691 | if (other->nop_job) |
692 | return -EEXIST; | |
693 | ||
fdf20a31 | 694 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
695 | return -EEXIST; |
696 | ||
d1fab3fe ZJS |
697 | if (other->id) |
698 | other_id = strdupa(other->id); | |
699 | ||
09a65f92 MS |
700 | /* Make reservations to ensure merge_dependencies() won't fail */ |
701 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
702 | r = reserve_dependencies(u, other, d); | |
703 | /* | |
704 | * We don't rollback reservations if we fail. We don't have | |
705 | * a way to undo reservations. A reservation is not a leak. | |
706 | */ | |
707 | if (r < 0) | |
708 | return r; | |
709 | } | |
710 | ||
87f0e418 | 711 | /* Merge names */ |
7c0b05e5 MS |
712 | r = merge_names(u, other); |
713 | if (r < 0) | |
714 | return r; | |
87f0e418 | 715 | |
57020a3a | 716 | /* Redirect all references */ |
ac155bb8 MS |
717 | while (other->refs) |
718 | unit_ref_set(other->refs, u); | |
57020a3a | 719 | |
87f0e418 LP |
720 | /* Merge dependencies */ |
721 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 722 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 723 | |
ac155bb8 MS |
724 | other->load_state = UNIT_MERGED; |
725 | other->merged_into = u; | |
23a177ef | 726 | |
3616a49c LP |
727 | /* If there is still some data attached to the other node, we |
728 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 729 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
730 | if (UNIT_VTABLE(other)->done) |
731 | UNIT_VTABLE(other)->done(other); | |
732 | ||
733 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
734 | unit_add_to_cleanup_queue(other); |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
739 | int unit_merge_by_name(Unit *u, const char *name) { | |
740 | Unit *other; | |
9e2f7c11 | 741 | int r; |
68eda4bd | 742 | _cleanup_free_ char *s = NULL; |
23a177ef LP |
743 | |
744 | assert(u); | |
745 | assert(name); | |
746 | ||
9e2f7c11 | 747 | if (unit_name_is_template(name)) { |
ac155bb8 | 748 | if (!u->instance) |
9e2f7c11 LP |
749 | return -EINVAL; |
750 | ||
e48614c4 ZJS |
751 | s = unit_name_replace_instance(name, u->instance); |
752 | if (!s) | |
9e2f7c11 LP |
753 | return -ENOMEM; |
754 | ||
755 | name = s; | |
756 | } | |
757 | ||
c2756a68 LP |
758 | other = manager_get_unit(u->manager, name); |
759 | if (!other) | |
9e2f7c11 LP |
760 | r = unit_add_name(u, name); |
761 | else | |
762 | r = unit_merge(u, other); | |
23a177ef | 763 | |
9e2f7c11 | 764 | return r; |
23a177ef LP |
765 | } |
766 | ||
767 | Unit* unit_follow_merge(Unit *u) { | |
768 | assert(u); | |
769 | ||
ac155bb8 MS |
770 | while (u->load_state == UNIT_MERGED) |
771 | assert_se(u = u->merged_into); | |
23a177ef LP |
772 | |
773 | return u; | |
774 | } | |
775 | ||
776 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
777 | int r; | |
778 | ||
779 | assert(u); | |
780 | assert(c); | |
781 | ||
36be24c8 ZJS |
782 | if (c->working_directory) { |
783 | r = unit_require_mounts_for(u, c->working_directory); | |
784 | if (r < 0) | |
785 | return r; | |
786 | } | |
787 | ||
788 | if (c->root_directory) { | |
789 | r = unit_require_mounts_for(u, c->root_directory); | |
790 | if (r < 0) | |
791 | return r; | |
792 | } | |
793 | ||
b46a529c LP |
794 | if (u->manager->running_as != SYSTEMD_SYSTEM) |
795 | return 0; | |
796 | ||
797 | if (c->private_tmp) { | |
798 | r = unit_require_mounts_for(u, "/tmp"); | |
799 | if (r < 0) | |
800 | return r; | |
801 | ||
802 | r = unit_require_mounts_for(u, "/var/tmp"); | |
803 | if (r < 0) | |
804 | return r; | |
805 | } | |
806 | ||
ecc6e2b8 LP |
807 | if (c->std_output != EXEC_OUTPUT_KMSG && |
808 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 809 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
810 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
811 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 812 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 813 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 814 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 815 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 816 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 817 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 818 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
819 | return 0; |
820 | ||
821 | /* If syslog or kernel logging is requested, make sure our own | |
822 | * logging daemon is run first. */ | |
823 | ||
b46a529c LP |
824 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
825 | if (r < 0) | |
826 | return r; | |
23a177ef | 827 | |
87f0e418 LP |
828 | return 0; |
829 | } | |
830 | ||
87f0e418 LP |
831 | const char *unit_description(Unit *u) { |
832 | assert(u); | |
833 | ||
ac155bb8 MS |
834 | if (u->description) |
835 | return u->description; | |
87f0e418 | 836 | |
ac155bb8 | 837 | return strna(u->id); |
87f0e418 LP |
838 | } |
839 | ||
840 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 841 | char *t, **j; |
87f0e418 LP |
842 | UnitDependency d; |
843 | Iterator i; | |
47be870b | 844 | const char *prefix2; |
173e3821 LP |
845 | char |
846 | timestamp1[FORMAT_TIMESTAMP_MAX], | |
847 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
848 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
849 | timestamp4[FORMAT_TIMESTAMP_MAX], |
850 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 851 | Unit *following; |
eeaedb7c LP |
852 | _cleanup_set_free_ Set *following_set = NULL; |
853 | int r; | |
87f0e418 LP |
854 | |
855 | assert(u); | |
ac155bb8 | 856 | assert(u->type >= 0); |
87f0e418 | 857 | |
4c940960 LP |
858 | prefix = strempty(prefix); |
859 | prefix2 = strappenda(prefix, "\t"); | |
87f0e418 LP |
860 | |
861 | fprintf(f, | |
40d50879 | 862 | "%s-> Unit %s:\n" |
87f0e418 | 863 | "%s\tDescription: %s\n" |
9e2f7c11 | 864 | "%s\tInstance: %s\n" |
87f0e418 | 865 | "%s\tUnit Load State: %s\n" |
2fad8195 | 866 | "%s\tUnit Active State: %s\n" |
173e3821 | 867 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 868 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 869 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 870 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 871 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 872 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 873 | "%s\tTransient: %s\n" |
4ad49000 LP |
874 | "%s\tSlice: %s\n" |
875 | "%s\tCGroup: %s\n" | |
876 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
877 | "%s\tCGroup mask: 0x%x\n" |
878 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 879 | prefix, u->id, |
87f0e418 | 880 | prefix, unit_description(u), |
ac155bb8 MS |
881 | prefix, strna(u->instance), |
882 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 883 | prefix, unit_active_state_to_string(unit_active_state(u)), |
ac155bb8 MS |
884 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
885 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
886 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
887 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 888 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 889 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 890 | prefix, yes_no(u->transient), |
4ad49000 LP |
891 | prefix, strna(unit_slice_name(u)), |
892 | prefix, strna(u->cgroup_path), | |
893 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 894 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 895 | prefix, u->cgroup_members_mask); |
0301abf4 | 896 | |
ac155bb8 | 897 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
898 | fprintf(f, "%s\tName: %s\n", prefix, t); |
899 | ||
49dbfa7b LP |
900 | STRV_FOREACH(j, u->documentation) |
901 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
902 | ||
eeaedb7c LP |
903 | following = unit_following(u); |
904 | if (following) | |
ac155bb8 | 905 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 906 | |
eeaedb7c LP |
907 | r = unit_following_set(u, &following_set); |
908 | if (r >= 0) { | |
909 | Unit *other; | |
910 | ||
911 | SET_FOREACH(other, following_set, i) | |
912 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
913 | } | |
914 | ||
ac155bb8 MS |
915 | if (u->fragment_path) |
916 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 917 | |
1b64d026 LP |
918 | if (u->source_path) |
919 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
920 | ||
ae7a7182 | 921 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 922 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 923 | |
ac155bb8 | 924 | if (u->job_timeout > 0) |
2fa4092c | 925 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 926 | |
f189ab18 LP |
927 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
928 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
929 | ||
930 | if (u->job_timeout_reboot_arg) | |
931 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
932 | ||
59fccdc5 LP |
933 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
934 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 935 | |
ac155bb8 | 936 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
937 | fprintf(f, |
938 | "%s\tCondition Timestamp: %s\n" | |
939 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
940 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
941 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 942 | |
59fccdc5 LP |
943 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
944 | fprintf(f, | |
945 | "%s\tAssert Timestamp: %s\n" | |
946 | "%s\tAssert Result: %s\n", | |
947 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
948 | prefix, yes_no(u->assert_result)); | |
949 | ||
87f0e418 LP |
950 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
951 | Unit *other; | |
952 | ||
ac155bb8 MS |
953 | SET_FOREACH(other, u->dependencies[d], i) |
954 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
955 | } |
956 | ||
7c8fa05c | 957 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
958 | fprintf(f, |
959 | "%s\tRequiresMountsFor:", prefix); | |
960 | ||
961 | STRV_FOREACH(j, u->requires_mounts_for) | |
962 | fprintf(f, " %s", *j); | |
963 | ||
964 | fputs("\n", f); | |
965 | } | |
966 | ||
ac155bb8 | 967 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 968 | |
b0650475 | 969 | fprintf(f, |
a40eb732 | 970 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
971 | "%s\tRefuseManualStart: %s\n" |
972 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 973 | "%s\tDefaultDependencies: %s\n" |
d420282b | 974 | "%s\tOnFailureJobMode: %s\n" |
7a6000a6 LP |
975 | "%s\tIgnoreOnIsolate: %s\n" |
976 | "%s\tIgnoreOnSnapshot: %s\n", | |
ac155bb8 MS |
977 | prefix, yes_no(u->stop_when_unneeded), |
978 | prefix, yes_no(u->refuse_manual_start), | |
979 | prefix, yes_no(u->refuse_manual_stop), | |
980 | prefix, yes_no(u->default_dependencies), | |
d420282b | 981 | prefix, job_mode_to_string(u->on_failure_job_mode), |
ac155bb8 MS |
982 | prefix, yes_no(u->ignore_on_isolate), |
983 | prefix, yes_no(u->ignore_on_snapshot)); | |
984 | ||
23a177ef LP |
985 | if (UNIT_VTABLE(u)->dump) |
986 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 987 | |
ac155bb8 | 988 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
989 | fprintf(f, |
990 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
991 | prefix, u->merged_into->id); |
992 | else if (u->load_state == UNIT_ERROR) | |
993 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 994 | |
87f0e418 | 995 | |
ac155bb8 MS |
996 | if (u->job) |
997 | job_dump(u->job, f, prefix2); | |
87f0e418 | 998 | |
e0209d83 MS |
999 | if (u->nop_job) |
1000 | job_dump(u->nop_job, f, prefix2); | |
1001 | ||
87f0e418 LP |
1002 | } |
1003 | ||
1004 | /* Common implementation for multiple backends */ | |
e537352b | 1005 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1006 | int r; |
1007 | ||
1008 | assert(u); | |
23a177ef | 1009 | |
e48614c4 | 1010 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1011 | r = unit_load_fragment(u); |
1012 | if (r < 0) | |
23a177ef LP |
1013 | return r; |
1014 | ||
ac155bb8 | 1015 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1016 | return -ENOENT; |
1017 | ||
1018 | /* Load drop-in directory data */ | |
4ad49000 LP |
1019 | r = unit_load_dropin(unit_follow_merge(u)); |
1020 | if (r < 0) | |
23a177ef LP |
1021 | return r; |
1022 | ||
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | /* Common implementation for multiple backends */ | |
e537352b | 1027 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1028 | int r; |
87f0e418 LP |
1029 | |
1030 | assert(u); | |
1031 | ||
23a177ef LP |
1032 | /* Same as unit_load_fragment_and_dropin(), but whether |
1033 | * something can be loaded or not doesn't matter. */ | |
1034 | ||
1035 | /* Load a .service file */ | |
4ad49000 LP |
1036 | r = unit_load_fragment(u); |
1037 | if (r < 0) | |
87f0e418 LP |
1038 | return r; |
1039 | ||
ac155bb8 MS |
1040 | if (u->load_state == UNIT_STUB) |
1041 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1042 | |
87f0e418 | 1043 | /* Load drop-in directory data */ |
4ad49000 LP |
1044 | r = unit_load_dropin(unit_follow_merge(u)); |
1045 | if (r < 0) | |
87f0e418 LP |
1046 | return r; |
1047 | ||
23a177ef | 1048 | return 0; |
87f0e418 LP |
1049 | } |
1050 | ||
bba34eed | 1051 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1052 | assert(u); |
1053 | assert(target); | |
1054 | ||
ac155bb8 | 1055 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1056 | return 0; |
1057 | ||
35b8ca3a | 1058 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1059 | * that loop check below is reliable */ |
ac155bb8 MS |
1060 | if (u->load_state != UNIT_LOADED || |
1061 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1062 | return 0; |
1063 | ||
21256a2b LP |
1064 | /* If either side wants no automatic dependencies, then let's |
1065 | * skip this */ | |
ac155bb8 MS |
1066 | if (!u->default_dependencies || |
1067 | !target->default_dependencies) | |
21256a2b LP |
1068 | return 0; |
1069 | ||
98bc2000 | 1070 | /* Don't create loops */ |
ac155bb8 | 1071 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1072 | return 0; |
1073 | ||
1074 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1075 | } | |
1076 | ||
e954c9cf | 1077 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1078 | |
21256a2b LP |
1079 | static const UnitDependency deps[] = { |
1080 | UNIT_REQUIRED_BY, | |
1081 | UNIT_REQUIRED_BY_OVERRIDABLE, | |
1082 | UNIT_WANTED_BY, | |
1083 | UNIT_BOUND_BY | |
1084 | }; | |
1085 | ||
bba34eed | 1086 | Unit *target; |
98bc2000 | 1087 | Iterator i; |
21256a2b | 1088 | unsigned k; |
db57f3c6 | 1089 | int r = 0; |
98bc2000 LP |
1090 | |
1091 | assert(u); | |
1092 | ||
21256a2b | 1093 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1094 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1095 | r = unit_add_default_target_dependency(u, target); | |
1096 | if (r < 0) | |
21256a2b | 1097 | return r; |
a016b922 LP |
1098 | } |
1099 | ||
e954c9cf LP |
1100 | return r; |
1101 | } | |
4ad49000 | 1102 | |
e954c9cf LP |
1103 | static int unit_add_slice_dependencies(Unit *u) { |
1104 | assert(u); | |
b81884e7 | 1105 | |
e954c9cf LP |
1106 | if (!unit_get_cgroup_context(u)) |
1107 | return 0; | |
1108 | ||
1109 | if (UNIT_ISSET(u->slice)) | |
1110 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_WANTS, UNIT_DEREF(u->slice), true); | |
1111 | ||
d1fab3fe ZJS |
1112 | if (streq(u->id, SPECIAL_ROOT_SLICE)) |
1113 | return 0; | |
1114 | ||
e954c9cf | 1115 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1116 | } |
1117 | ||
e954c9cf | 1118 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1119 | char **i; |
1120 | int r; | |
1121 | ||
1122 | assert(u); | |
1123 | ||
1124 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1125 | char prefix[strlen(*i) + 1]; | |
1126 | ||
1127 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
1128 | Unit *m; | |
1129 | ||
1130 | r = manager_get_unit_by_path(u->manager, prefix, ".mount", &m); | |
1131 | if (r < 0) | |
1132 | return r; | |
1133 | if (r == 0) | |
1134 | continue; | |
1135 | if (m == u) | |
1136 | continue; | |
1137 | ||
1138 | if (m->load_state != UNIT_LOADED) | |
1139 | continue; | |
1140 | ||
1141 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1142 | if (r < 0) | |
1143 | return r; | |
1144 | ||
1145 | if (m->fragment_path) { | |
1146 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1147 | if (r < 0) | |
1148 | return r; | |
1149 | } | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
95ae05c0 WC |
1156 | static int unit_add_startup_units(Unit *u) { |
1157 | CGroupContext *c; | |
1158 | int r = 0; | |
1159 | ||
1160 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1161 | if (!c) |
1162 | return 0; | |
1163 | ||
1164 | if (c->startup_cpu_shares == (unsigned long) -1 && | |
1165 | c->startup_blockio_weight == (unsigned long) -1) | |
1166 | return 0; | |
1167 | ||
1168 | r = set_put(u->manager->startup_units, u); | |
1169 | if (r == -EEXIST) | |
1170 | return 0; | |
1171 | ||
95ae05c0 WC |
1172 | return r; |
1173 | } | |
1174 | ||
87f0e418 LP |
1175 | int unit_load(Unit *u) { |
1176 | int r; | |
1177 | ||
1178 | assert(u); | |
1179 | ||
ac155bb8 | 1180 | if (u->in_load_queue) { |
71fda00f | 1181 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1182 | u->in_load_queue = false; |
87f0e418 LP |
1183 | } |
1184 | ||
ac155bb8 | 1185 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1186 | return -EINVAL; |
1187 | ||
ac155bb8 | 1188 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1189 | return 0; |
1190 | ||
c2756a68 LP |
1191 | if (UNIT_VTABLE(u)->load) { |
1192 | r = UNIT_VTABLE(u)->load(u); | |
1193 | if (r < 0) | |
87f0e418 | 1194 | goto fail; |
c2756a68 | 1195 | } |
23a177ef | 1196 | |
ac155bb8 | 1197 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1198 | r = -ENOENT; |
1199 | goto fail; | |
1200 | } | |
1201 | ||
7c8fa05c | 1202 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1203 | |
e954c9cf LP |
1204 | r = unit_add_target_dependencies(u); |
1205 | if (r < 0) | |
1206 | goto fail; | |
1207 | ||
1208 | r = unit_add_slice_dependencies(u); | |
1209 | if (r < 0) | |
1210 | goto fail; | |
c2756a68 | 1211 | |
e954c9cf | 1212 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1213 | if (r < 0) |
c2756a68 | 1214 | goto fail; |
7c8fa05c | 1215 | |
95ae05c0 WC |
1216 | r = unit_add_startup_units(u); |
1217 | if (r < 0) | |
1218 | goto fail; | |
1219 | ||
bc432dc7 | 1220 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
79008bdd | 1221 | log_unit_error(u->id, "More than one OnFailure= dependencies specified for %s but OnFailureJobMode=isolate set. Refusing.", u->id); |
c2756a68 LP |
1222 | r = -EINVAL; |
1223 | goto fail; | |
1224 | } | |
bc432dc7 LP |
1225 | |
1226 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1227 | } |
1228 | ||
ac155bb8 | 1229 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1230 | |
1231 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1232 | unit_add_to_gc_queue(u); |
87f0e418 | 1233 | |
87f0e418 LP |
1234 | return 0; |
1235 | ||
1236 | fail: | |
c2756a68 | 1237 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1238 | u->load_error = r; |
c1e1601e | 1239 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1240 | unit_add_to_gc_queue(u); |
23a177ef | 1241 | |
79008bdd | 1242 | log_unit_debug(u->id, "Failed to load configuration for %s: %s", |
c1b6628d | 1243 | u->id, strerror(-r)); |
23a177ef | 1244 | |
87f0e418 LP |
1245 | return r; |
1246 | } | |
1247 | ||
49365733 LP |
1248 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1249 | Condition *c; | |
1250 | int triggered = -1; | |
1251 | ||
1252 | assert(u); | |
1253 | assert(to_string); | |
1254 | ||
1255 | /* If the condition list is empty, then it is true */ | |
1256 | if (!first) | |
1257 | return true; | |
1258 | ||
1259 | /* Otherwise, if all of the non-trigger conditions apply and | |
1260 | * if any of the trigger conditions apply (unless there are | |
1261 | * none) we return true */ | |
1262 | LIST_FOREACH(conditions, c, first) { | |
1263 | int r; | |
1264 | ||
1265 | r = condition_test(c); | |
1266 | if (r < 0) | |
79008bdd | 1267 | log_unit_warning(u->id, |
49365733 LP |
1268 | "Couldn't determine result for %s=%s%s%s for %s, assuming failed: %s", |
1269 | to_string(c->type), | |
1270 | c->trigger ? "|" : "", | |
1271 | c->negate ? "!" : "", | |
1272 | c->parameter, | |
1273 | u->id, | |
1274 | strerror(-r)); | |
1275 | else | |
79008bdd | 1276 | log_unit_debug(u->id, |
49365733 LP |
1277 | "%s=%s%s%s %s for %s.", |
1278 | to_string(c->type), | |
1279 | c->trigger ? "|" : "", | |
1280 | c->negate ? "!" : "", | |
1281 | c->parameter, | |
1282 | condition_result_to_string(c->result), | |
1283 | u->id); | |
1284 | ||
1285 | if (!c->trigger && r <= 0) | |
1286 | return false; | |
1287 | ||
1288 | if (c->trigger && triggered <= 0) | |
1289 | triggered = r > 0; | |
1290 | } | |
1291 | ||
1292 | return triggered != 0; | |
1293 | } | |
1294 | ||
9588bc32 | 1295 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1296 | assert(u); |
1297 | ||
ac155bb8 | 1298 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1299 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1300 | |
ac155bb8 | 1301 | return u->condition_result; |
90bbc946 LP |
1302 | } |
1303 | ||
59fccdc5 LP |
1304 | static bool unit_assert_test(Unit *u) { |
1305 | assert(u); | |
1306 | ||
1307 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1308 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1309 | |
1310 | return u->assert_result; | |
1311 | } | |
1312 | ||
44a6b1b6 | 1313 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
c6918296 | 1314 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1315 | |
1316 | assert(u); | |
1317 | assert(t >= 0); | |
1318 | assert(t < _JOB_TYPE_MAX); | |
1319 | ||
1320 | if (t != JOB_START && t != JOB_STOP) | |
1321 | return NULL; | |
c6918296 MS |
1322 | |
1323 | format_table = &UNIT_VTABLE(u)->status_message_formats; | |
1324 | if (!format_table) | |
877d54e9 LP |
1325 | return NULL; |
1326 | ||
1327 | return format_table->starting_stopping[t == JOB_STOP]; | |
1328 | } | |
1329 | ||
44a6b1b6 | 1330 | _pure_ static const char *unit_get_status_message_format_try_harder(Unit *u, JobType t) { |
877d54e9 LP |
1331 | const char *format; |
1332 | ||
1333 | assert(u); | |
1334 | assert(t >= 0); | |
1335 | assert(t < _JOB_TYPE_MAX); | |
1336 | ||
1337 | format = unit_get_status_message_format(u, t); | |
1338 | if (format) | |
1339 | return format; | |
1340 | ||
1341 | /* Return generic strings */ | |
1342 | if (t == JOB_START) | |
1343 | return "Starting %s."; | |
1344 | else if (t == JOB_STOP) | |
1345 | return "Stopping %s."; | |
1346 | else if (t == JOB_RELOAD) | |
1347 | return "Reloading %s."; | |
1348 | ||
1349 | return NULL; | |
1350 | } | |
1351 | ||
1352 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1353 | const char *format; | |
1354 | ||
1355 | assert(u); | |
1356 | ||
1357 | /* We only print status messages for selected units on | |
1358 | * selected operations. */ | |
c6918296 | 1359 | |
877d54e9 | 1360 | format = unit_get_status_message_format(u, t); |
c6918296 MS |
1361 | if (!format) |
1362 | return; | |
1363 | ||
bcfce235 | 1364 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1365 | unit_status_printf(u, "", format); |
bcfce235 | 1366 | REENABLE_WARNING; |
c6918296 MS |
1367 | } |
1368 | ||
877d54e9 LP |
1369 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1370 | const char *format; | |
1371 | char buf[LINE_MAX]; | |
1372 | sd_id128_t mid; | |
1373 | ||
1374 | assert(u); | |
1375 | ||
1376 | if (t != JOB_START && t != JOB_STOP && t != JOB_RELOAD) | |
1377 | return; | |
1378 | ||
81270860 LP |
1379 | if (log_on_console()) |
1380 | return; | |
1381 | ||
877d54e9 LP |
1382 | /* We log status messages for all units and all operations. */ |
1383 | ||
1384 | format = unit_get_status_message_format_try_harder(u, t); | |
1385 | if (!format) | |
1386 | return; | |
1387 | ||
bcfce235 | 1388 | DISABLE_WARNING_FORMAT_NONLITERAL; |
877d54e9 LP |
1389 | snprintf(buf, sizeof(buf), format, unit_description(u)); |
1390 | char_array_0(buf); | |
bcfce235 | 1391 | REENABLE_WARNING; |
877d54e9 LP |
1392 | |
1393 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1394 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1395 | SD_MESSAGE_UNIT_RELOADING; | |
1396 | ||
e2cc6eca LP |
1397 | log_unit_struct(u->id, |
1398 | LOG_INFO, | |
1399 | LOG_MESSAGE_ID(mid), | |
1400 | LOG_MESSAGE("%s", buf), | |
c1b6628d | 1401 | NULL); |
877d54e9 | 1402 | } |
877d54e9 | 1403 | |
87f0e418 | 1404 | /* Errors: |
d5159713 LP |
1405 | * -EBADR: This unit type does not support starting. |
1406 | * -EALREADY: Unit is already started. | |
1407 | * -EAGAIN: An operation is already in progress. Retry later. | |
1408 | * -ECANCELED: Too many requests for now. | |
59fccdc5 | 1409 | * -EPROTO: Assert failed |
87f0e418 LP |
1410 | */ |
1411 | int unit_start(Unit *u) { | |
1412 | UnitActiveState state; | |
92ab323c | 1413 | Unit *following; |
87f0e418 LP |
1414 | |
1415 | assert(u); | |
1416 | ||
ac155bb8 | 1417 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1418 | return -EINVAL; |
1419 | ||
a82e5507 LP |
1420 | /* If this is already started, then this will succeed. Note |
1421 | * that this will even succeed if this unit is not startable | |
1422 | * by the user. This is relied on to detect when we need to | |
1423 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1424 | state = unit_active_state(u); |
1425 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1426 | return -EALREADY; | |
1427 | ||
a82e5507 LP |
1428 | /* If the conditions failed, don't do anything at all. If we |
1429 | * already are activating this call might still be useful to | |
1430 | * speed up activation in case there is some hold-off time, | |
1431 | * but we don't want to recheck the condition in that case. */ | |
1432 | if (state != UNIT_ACTIVATING && | |
1433 | !unit_condition_test(u)) { | |
79008bdd | 1434 | log_unit_debug(u->id, "Starting of %s requested but condition failed. Not starting unit.", u->id); |
52661efd LP |
1435 | return -EALREADY; |
1436 | } | |
1437 | ||
59fccdc5 LP |
1438 | /* If the asserts failed, fail the entire job */ |
1439 | if (state != UNIT_ACTIVATING && | |
1440 | !unit_assert_test(u)) { | |
79008bdd | 1441 | log_unit_debug(u->id, "Starting of %s requested but asserts failed.", u->id); |
59fccdc5 LP |
1442 | return -EPROTO; |
1443 | } | |
1444 | ||
92ab323c | 1445 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1446 | following = unit_following(u); |
1447 | if (following) { | |
79008bdd | 1448 | log_unit_debug(u->id, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1449 | return unit_start(following); |
1450 | } | |
1451 | ||
877d54e9 LP |
1452 | unit_status_log_starting_stopping_reloading(u, JOB_START); |
1453 | unit_status_print_starting_stopping(u, JOB_START); | |
c6918296 | 1454 | |
92ab323c LP |
1455 | /* If it is stopped, but we cannot start it, then fail */ |
1456 | if (!UNIT_VTABLE(u)->start) | |
1457 | return -EBADR; | |
1458 | ||
87f0e418 LP |
1459 | /* We don't suppress calls to ->start() here when we are |
1460 | * already starting, to allow this request to be used as a | |
1461 | * "hurry up" call, for example when the unit is in some "auto | |
1462 | * restart" state where it waits for a holdoff timer to elapse | |
1463 | * before it will start again. */ | |
1464 | ||
c1e1601e | 1465 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1466 | |
87f0e418 LP |
1467 | return UNIT_VTABLE(u)->start(u); |
1468 | } | |
1469 | ||
1470 | bool unit_can_start(Unit *u) { | |
1471 | assert(u); | |
1472 | ||
1473 | return !!UNIT_VTABLE(u)->start; | |
1474 | } | |
1475 | ||
2528a7a6 LP |
1476 | bool unit_can_isolate(Unit *u) { |
1477 | assert(u); | |
1478 | ||
1479 | return unit_can_start(u) && | |
ac155bb8 | 1480 | u->allow_isolate; |
2528a7a6 LP |
1481 | } |
1482 | ||
87f0e418 LP |
1483 | /* Errors: |
1484 | * -EBADR: This unit type does not support stopping. | |
1485 | * -EALREADY: Unit is already stopped. | |
1486 | * -EAGAIN: An operation is already in progress. Retry later. | |
1487 | */ | |
1488 | int unit_stop(Unit *u) { | |
1489 | UnitActiveState state; | |
92ab323c | 1490 | Unit *following; |
87f0e418 LP |
1491 | |
1492 | assert(u); | |
1493 | ||
87f0e418 | 1494 | state = unit_active_state(u); |
fdf20a31 | 1495 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1496 | return -EALREADY; |
1497 | ||
92ab323c | 1498 | if ((following = unit_following(u))) { |
79008bdd | 1499 | log_unit_debug(u->id, "Redirecting stop request from %s to %s.", |
c1b6628d | 1500 | u->id, following->id); |
92ab323c LP |
1501 | return unit_stop(following); |
1502 | } | |
1503 | ||
877d54e9 LP |
1504 | unit_status_log_starting_stopping_reloading(u, JOB_STOP); |
1505 | unit_status_print_starting_stopping(u, JOB_STOP); | |
c6918296 | 1506 | |
7898b0cf LP |
1507 | if (!UNIT_VTABLE(u)->stop) |
1508 | return -EBADR; | |
1509 | ||
c1e1601e | 1510 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1511 | |
87f0e418 LP |
1512 | return UNIT_VTABLE(u)->stop(u); |
1513 | } | |
1514 | ||
1515 | /* Errors: | |
1516 | * -EBADR: This unit type does not support reloading. | |
1517 | * -ENOEXEC: Unit is not started. | |
1518 | * -EAGAIN: An operation is already in progress. Retry later. | |
1519 | */ | |
1520 | int unit_reload(Unit *u) { | |
1521 | UnitActiveState state; | |
92ab323c | 1522 | Unit *following; |
87f0e418 LP |
1523 | |
1524 | assert(u); | |
1525 | ||
ac155bb8 | 1526 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1527 | return -EINVAL; |
1528 | ||
87f0e418 LP |
1529 | if (!unit_can_reload(u)) |
1530 | return -EBADR; | |
1531 | ||
1532 | state = unit_active_state(u); | |
e364ad06 | 1533 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1534 | return -EALREADY; |
1535 | ||
6a371e23 | 1536 | if (state != UNIT_ACTIVE) { |
79008bdd | 1537 | log_unit_warning(u->id, "Unit %s cannot be reloaded because it is inactive.", |
6a371e23 | 1538 | u->id); |
87f0e418 | 1539 | return -ENOEXEC; |
6a371e23 | 1540 | } |
87f0e418 | 1541 | |
e48614c4 ZJS |
1542 | following = unit_following(u); |
1543 | if (following) { | |
79008bdd | 1544 | log_unit_debug(u->id, "Redirecting reload request from %s to %s.", |
c1b6628d | 1545 | u->id, following->id); |
92ab323c LP |
1546 | return unit_reload(following); |
1547 | } | |
1548 | ||
877d54e9 LP |
1549 | unit_status_log_starting_stopping_reloading(u, JOB_RELOAD); |
1550 | ||
c1e1601e | 1551 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1552 | return UNIT_VTABLE(u)->reload(u); |
1553 | } | |
1554 | ||
1555 | bool unit_can_reload(Unit *u) { | |
1556 | assert(u); | |
1557 | ||
1558 | if (!UNIT_VTABLE(u)->reload) | |
1559 | return false; | |
1560 | ||
1561 | if (!UNIT_VTABLE(u)->can_reload) | |
1562 | return true; | |
1563 | ||
1564 | return UNIT_VTABLE(u)->can_reload(u); | |
1565 | } | |
1566 | ||
b4a16b7b | 1567 | static void unit_check_unneeded(Unit *u) { |
f3bff0eb LP |
1568 | Iterator i; |
1569 | Unit *other; | |
1570 | ||
1571 | assert(u); | |
1572 | ||
1573 | /* If this service shall be shut down when unneeded then do | |
1574 | * so. */ | |
1575 | ||
ac155bb8 | 1576 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1577 | return; |
1578 | ||
1579 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1580 | return; | |
1581 | ||
ac155bb8 | 1582 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY], i) |
31afa0a4 | 1583 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1584 | return; |
1585 | ||
ac155bb8 | 1586 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRED_BY_OVERRIDABLE], i) |
31afa0a4 | 1587 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1588 | return; |
1589 | ||
ac155bb8 | 1590 | SET_FOREACH(other, u->dependencies[UNIT_WANTED_BY], i) |
31afa0a4 | 1591 | if (unit_active_or_pending(other)) |
f3bff0eb LP |
1592 | return; |
1593 | ||
ac155bb8 | 1594 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
31afa0a4 | 1595 | if (unit_active_or_pending(other)) |
b81884e7 LP |
1596 | return; |
1597 | ||
79008bdd | 1598 | log_unit_info(u->id, "Unit %s is not needed anymore. Stopping.", u->id); |
f3bff0eb LP |
1599 | |
1600 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
ac155bb8 | 1601 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); |
f3bff0eb LP |
1602 | } |
1603 | ||
ff502445 LP |
1604 | static void unit_check_binds_to(Unit *u) { |
1605 | bool stop = false; | |
1606 | Unit *other; | |
1607 | Iterator i; | |
1608 | ||
1609 | assert(u); | |
1610 | ||
1611 | if (u->job) | |
1612 | return; | |
1613 | ||
1614 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1615 | return; | |
1616 | ||
1617 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1618 | if (other->job) | |
1619 | continue; | |
1620 | ||
1621 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1622 | continue; | |
1623 | ||
1624 | stop = true; | |
1625 | } | |
1626 | ||
1627 | if (!stop) | |
1628 | return; | |
1629 | ||
79008bdd | 1630 | log_unit_info(u->id, "Unit %s is bound to inactive service. Stopping, too.", u->id); |
ff502445 LP |
1631 | |
1632 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
1633 | manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, true, NULL, NULL); | |
1634 | } | |
1635 | ||
87f0e418 LP |
1636 | static void retroactively_start_dependencies(Unit *u) { |
1637 | Iterator i; | |
1638 | Unit *other; | |
1639 | ||
1640 | assert(u); | |
1641 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1642 | ||
ac155bb8 MS |
1643 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1644 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1645 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1646 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
b81884e7 | 1647 | |
7f2cddae | 1648 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1649 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1650 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1651 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 | 1652 | |
ac155bb8 MS |
1653 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
1654 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1655 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1656 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1657 | |
ac155bb8 MS |
1658 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1659 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1660 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
ac155bb8 | 1661 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, false, NULL, NULL); |
87f0e418 | 1662 | |
ac155bb8 | 1663 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1664 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1665 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
69dd2852 | 1666 | |
ac155bb8 | 1667 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1668 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1669 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
87f0e418 LP |
1670 | } |
1671 | ||
1672 | static void retroactively_stop_dependencies(Unit *u) { | |
1673 | Iterator i; | |
1674 | Unit *other; | |
1675 | ||
1676 | assert(u); | |
1677 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1678 | ||
b81884e7 | 1679 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1680 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1681 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
ac155bb8 | 1682 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, true, NULL, NULL); |
cd0504d0 MS |
1683 | } |
1684 | ||
1685 | static void check_unneeded_dependencies(Unit *u) { | |
1686 | Iterator i; | |
1687 | Unit *other; | |
1688 | ||
1689 | assert(u); | |
1690 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1691 | |
1692 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1693 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1694 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1695 | unit_check_unneeded(other); |
ac155bb8 | 1696 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) |
f3bff0eb | 1697 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1698 | unit_check_unneeded(other); |
ac155bb8 | 1699 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1700 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1701 | unit_check_unneeded(other); |
ac155bb8 | 1702 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1703 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1704 | unit_check_unneeded(other); |
ac155bb8 | 1705 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) |
f3bff0eb | 1706 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1707 | unit_check_unneeded(other); |
7f2cddae | 1708 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1709 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1710 | unit_check_unneeded(other); | |
87f0e418 LP |
1711 | } |
1712 | ||
3ecaa09b | 1713 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1714 | Unit *other; |
1715 | Iterator i; | |
1716 | ||
1717 | assert(u); | |
1718 | ||
ac155bb8 | 1719 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1720 | return; |
1721 | ||
79008bdd | 1722 | log_unit_info(u->id, "Triggering OnFailure= dependencies of %s.", u->id); |
222ae6a8 | 1723 | |
ac155bb8 | 1724 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1725 | int r; |
1726 | ||
d420282b | 1727 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, true, NULL, NULL); |
c1b6628d | 1728 | if (r < 0) |
31938a85 | 1729 | log_unit_error_errno(u->id, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1730 | } |
c0daa706 LP |
1731 | } |
1732 | ||
3ecaa09b LP |
1733 | void unit_trigger_notify(Unit *u) { |
1734 | Unit *other; | |
1735 | Iterator i; | |
1736 | ||
1737 | assert(u); | |
1738 | ||
1739 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1740 | if (UNIT_VTABLE(other)->trigger_notify) | |
1741 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1742 | } | |
1743 | ||
e2f3b44c | 1744 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1745 | Manager *m; |
7e6e7b06 | 1746 | bool unexpected; |
a096ed36 | 1747 | |
87f0e418 LP |
1748 | assert(u); |
1749 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1750 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1751 | |
8e471ccd LP |
1752 | /* Note that this is called for all low-level state changes, |
1753 | * even if they might map to the same high-level | |
865cc19a | 1754 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1755 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1756 | * this function will be called too! */ |
87f0e418 | 1757 | |
546ac4f0 MS |
1758 | m = u->manager; |
1759 | ||
f755e3b7 | 1760 | /* Update timestamps for state changes */ |
546ac4f0 | 1761 | if (m->n_reloading <= 0) { |
bdbf9951 | 1762 | dual_timestamp ts; |
173e3821 | 1763 | |
bdbf9951 | 1764 | dual_timestamp_get(&ts); |
173e3821 | 1765 | |
bdbf9951 | 1766 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1767 | u->inactive_exit_timestamp = ts; |
bdbf9951 | 1768 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
ac155bb8 | 1769 | u->inactive_enter_timestamp = ts; |
bdbf9951 LP |
1770 | |
1771 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
ac155bb8 | 1772 | u->active_enter_timestamp = ts; |
bdbf9951 | 1773 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
ac155bb8 | 1774 | u->active_exit_timestamp = ts; |
bdbf9951 | 1775 | } |
87f0e418 | 1776 | |
865cc19a | 1777 | /* Keep track of failed units */ |
3f3cc397 | 1778 | if (ns == UNIT_FAILED) |
f755e3b7 | 1779 | set_put(u->manager->failed_units, u); |
3f3cc397 | 1780 | else |
f755e3b7 LP |
1781 | set_remove(u->manager->failed_units, u); |
1782 | ||
1783 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1784 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
4ad49000 | 1785 | unit_destroy_cgroup(u); |
fb385181 | 1786 | |
9cd86184 | 1787 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1788 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1789 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1790 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1791 | ExecContext *ec; |
1792 | ||
1793 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1794 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 ZJS |
1795 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
1796 | m->n_on_console --; | |
1797 | ||
1798 | if (m->n_on_console == 0) | |
1799 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1800 | m->no_console_output = false; |
31a7eb86 ZJS |
1801 | } else |
1802 | m->n_on_console ++; | |
7ed9f6cd MS |
1803 | } |
1804 | } | |
1805 | ||
ac155bb8 | 1806 | if (u->job) { |
7e6e7b06 | 1807 | unexpected = false; |
87f0e418 | 1808 | |
ac155bb8 | 1809 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1810 | |
1811 | /* So we reached a different state for this | |
1812 | * job. Let's see if we can run it now if it | |
1813 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1814 | job_add_to_run_queue(u->job); |
87f0e418 | 1815 | |
b410e6b9 | 1816 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1817 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1818 | * hence needs to invalidate jobs. */ |
87f0e418 | 1819 | |
ac155bb8 | 1820 | switch (u->job->type) { |
87f0e418 | 1821 | |
b410e6b9 LP |
1822 | case JOB_START: |
1823 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1824 | |
b410e6b9 | 1825 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
5273510e | 1826 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1827 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1828 | unexpected = true; |
41b02ec7 | 1829 | |
fdf20a31 | 1830 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1831 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
b410e6b9 | 1832 | } |
87f0e418 | 1833 | |
b410e6b9 | 1834 | break; |
87f0e418 | 1835 | |
b410e6b9 LP |
1836 | case JOB_RELOAD: |
1837 | case JOB_RELOAD_OR_START: | |
87f0e418 | 1838 | |
ac155bb8 | 1839 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1840 | if (ns == UNIT_ACTIVE) |
5273510e | 1841 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true); |
032ff4af | 1842 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1843 | unexpected = true; |
41b02ec7 | 1844 | |
fdf20a31 | 1845 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1846 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true); |
a096ed36 | 1847 | } |
b410e6b9 | 1848 | } |
87f0e418 | 1849 | |
b410e6b9 | 1850 | break; |
87f0e418 | 1851 | |
b410e6b9 LP |
1852 | case JOB_STOP: |
1853 | case JOB_RESTART: | |
1854 | case JOB_TRY_RESTART: | |
87f0e418 | 1855 | |
fdf20a31 | 1856 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
5273510e | 1857 | job_finish_and_invalidate(u->job, JOB_DONE, true); |
ac155bb8 | 1858 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1859 | unexpected = true; |
5273510e | 1860 | job_finish_and_invalidate(u->job, JOB_FAILED, true); |
b410e6b9 | 1861 | } |
87f0e418 | 1862 | |
b410e6b9 | 1863 | break; |
87f0e418 | 1864 | |
b410e6b9 LP |
1865 | default: |
1866 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1867 | } |
87f0e418 | 1868 | |
7e6e7b06 LP |
1869 | } else |
1870 | unexpected = true; | |
1871 | ||
546ac4f0 | 1872 | if (m->n_reloading <= 0) { |
f3bff0eb | 1873 | |
bdbf9951 LP |
1874 | /* If this state change happened without being |
1875 | * requested by a job, then let's retroactively start | |
1876 | * or stop dependencies. We skip that step when | |
1877 | * deserializing, since we don't want to create any | |
1878 | * additional jobs just because something is already | |
1879 | * activated. */ | |
1880 | ||
1881 | if (unexpected) { | |
1882 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1883 | retroactively_start_dependencies(u); | |
1884 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1885 | retroactively_stop_dependencies(u); | |
1886 | } | |
5de9682c | 1887 | |
cd0504d0 | 1888 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1889 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1890 | check_unneeded_dependencies(u); |
1891 | ||
bdbf9951 | 1892 | if (ns != os && ns == UNIT_FAILED) { |
79008bdd | 1893 | log_unit_notice(u->id, "Unit %s entered failed state.", u->id); |
3ecaa09b | 1894 | unit_start_on_failure(u); |
cd6d0a45 | 1895 | } |
3b2775c5 | 1896 | } |
e537352b | 1897 | |
3b2775c5 LP |
1898 | /* Some names are special */ |
1899 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
1900 | ||
1901 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 1902 | /* The bus might have just become available, |
3b2775c5 LP |
1903 | * hence try to connect to it, if we aren't |
1904 | * yet connected. */ | |
546ac4f0 | 1905 | bus_init(m, true); |
3b2775c5 | 1906 | |
ac155bb8 | 1907 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 1908 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
546ac4f0 | 1909 | m->n_reloading <= 0) { |
3b2775c5 | 1910 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 1911 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 1912 | u->in_audit = true; |
3b2775c5 | 1913 | } |
e983b760 | 1914 | |
3b2775c5 | 1915 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 1916 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 1917 | |
3b2775c5 | 1918 | } else { |
bdbf9951 | 1919 | |
3b2775c5 LP |
1920 | /* We don't care about D-Bus here, since we'll get an |
1921 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 1922 | |
ac155bb8 | 1923 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
1924 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
1925 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
546ac4f0 | 1926 | m->n_reloading <= 0) { |
4927fcae | 1927 | |
3b2775c5 LP |
1928 | /* Hmm, if there was no start record written |
1929 | * write it now, so that we always have a nice | |
1930 | * pair */ | |
ac155bb8 | 1931 | if (!u->in_audit) { |
546ac4f0 | 1932 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 1933 | |
3b2775c5 | 1934 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 1935 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
1936 | } else |
1937 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 1938 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 1939 | |
ac155bb8 | 1940 | u->in_audit = false; |
cd6d0a45 | 1941 | } |
f278026d LP |
1942 | } |
1943 | ||
546ac4f0 | 1944 | manager_recheck_journal(m); |
3ecaa09b | 1945 | unit_trigger_notify(u); |
3b2775c5 | 1946 | |
ff502445 LP |
1947 | if (u->manager->n_reloading <= 0) { |
1948 | /* Maybe we finished startup and are now ready for | |
1949 | * being stopped because unneeded? */ | |
bf6dcfa6 | 1950 | unit_check_unneeded(u); |
c1e1601e | 1951 | |
ff502445 LP |
1952 | /* Maybe we finished startup, but something we needed |
1953 | * has vanished? Let's die then. (This happens when | |
1954 | * something BindsTo= to a Type=oneshot unit, as these | |
1955 | * units go directly from starting to inactive, | |
1956 | * without ever entering started.) */ | |
1957 | unit_check_binds_to(u); | |
1958 | } | |
1959 | ||
c1e1601e | 1960 | unit_add_to_dbus_queue(u); |
701cc384 | 1961 | unit_add_to_gc_queue(u); |
87f0e418 LP |
1962 | } |
1963 | ||
87f0e418 | 1964 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
1965 | int q, r; |
1966 | ||
87f0e418 LP |
1967 | assert(u); |
1968 | assert(pid >= 1); | |
1969 | ||
5ba6985b LP |
1970 | /* Watch a specific PID. We only support one or two units |
1971 | * watching each PID for now, not more. */ | |
1972 | ||
d5099efc | 1973 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
1974 | if (r < 0) |
1975 | return r; | |
1976 | ||
d5099efc | 1977 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
1978 | if (r < 0) |
1979 | return r; | |
1980 | ||
5ba6985b LP |
1981 | r = hashmap_put(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
1982 | if (r == -EEXIST) { | |
d5099efc | 1983 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
1984 | if (r < 0) |
1985 | return r; | |
05e343b7 | 1986 | |
5ba6985b LP |
1987 | r = hashmap_put(u->manager->watch_pids2, LONG_TO_PTR(pid), u); |
1988 | } | |
a911bb9a | 1989 | |
5ba6985b | 1990 | q = set_put(u->pids, LONG_TO_PTR(pid)); |
a911bb9a LP |
1991 | if (q < 0) |
1992 | return q; | |
1993 | ||
1994 | return r; | |
87f0e418 LP |
1995 | } |
1996 | ||
1997 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1998 | assert(u); | |
1999 | assert(pid >= 1); | |
2000 | ||
5ba6985b LP |
2001 | hashmap_remove_value(u->manager->watch_pids1, LONG_TO_PTR(pid), u); |
2002 | hashmap_remove_value(u->manager->watch_pids2, LONG_TO_PTR(pid), u); | |
a911bb9a LP |
2003 | set_remove(u->pids, LONG_TO_PTR(pid)); |
2004 | } | |
2005 | ||
bd44e61b LP |
2006 | void unit_unwatch_all_pids(Unit *u) { |
2007 | assert(u); | |
2008 | ||
2009 | while (!set_isempty(u->pids)) | |
2010 | unit_unwatch_pid(u, PTR_TO_LONG(set_first(u->pids))); | |
2011 | ||
2012 | set_free(u->pids); | |
2013 | u->pids = NULL; | |
2014 | } | |
2015 | ||
2016 | static int unit_watch_pids_in_path(Unit *u, const char *path) { | |
a911bb9a LP |
2017 | _cleanup_closedir_ DIR *d = NULL; |
2018 | _cleanup_fclose_ FILE *f = NULL; | |
2019 | int ret = 0, r; | |
2020 | ||
2021 | assert(u); | |
2022 | assert(path); | |
2023 | ||
2024 | /* Adds all PIDs from a specific cgroup path to the set of PIDs we watch. */ | |
2025 | ||
2026 | r = cg_enumerate_processes(SYSTEMD_CGROUP_CONTROLLER, path, &f); | |
2027 | if (r >= 0) { | |
2028 | pid_t pid; | |
2029 | ||
2030 | while ((r = cg_read_pid(f, &pid)) > 0) { | |
2031 | r = unit_watch_pid(u, pid); | |
2032 | if (r < 0 && ret >= 0) | |
2033 | ret = r; | |
2034 | } | |
2035 | if (r < 0 && ret >= 0) | |
2036 | ret = r; | |
2037 | ||
2038 | } else if (ret >= 0) | |
2039 | ret = r; | |
2040 | ||
2041 | r = cg_enumerate_subgroups(SYSTEMD_CGROUP_CONTROLLER, path, &d); | |
2042 | if (r >= 0) { | |
2043 | char *fn; | |
2044 | ||
2045 | while ((r = cg_read_subgroup(d, &fn)) > 0) { | |
2046 | _cleanup_free_ char *p = NULL; | |
2047 | ||
2048 | p = strjoin(path, "/", fn, NULL); | |
2049 | free(fn); | |
2050 | ||
2051 | if (!p) | |
2052 | return -ENOMEM; | |
2053 | ||
bd44e61b | 2054 | r = unit_watch_pids_in_path(u, p); |
a911bb9a LP |
2055 | if (r < 0 && ret >= 0) |
2056 | ret = r; | |
2057 | } | |
2058 | if (r < 0 && ret >= 0) | |
2059 | ret = r; | |
2060 | ||
2061 | } else if (ret >= 0) | |
2062 | ret = r; | |
2063 | ||
2064 | return ret; | |
2065 | } | |
2066 | ||
a911bb9a LP |
2067 | int unit_watch_all_pids(Unit *u) { |
2068 | assert(u); | |
2069 | ||
a911bb9a LP |
2070 | /* Adds all PIDs from our cgroup to the set of PIDs we watch */ |
2071 | ||
bd44e61b LP |
2072 | if (!u->cgroup_path) |
2073 | return -ENOENT; | |
a911bb9a | 2074 | |
bd44e61b | 2075 | return unit_watch_pids_in_path(u, u->cgroup_path); |
a911bb9a LP |
2076 | } |
2077 | ||
2078 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2079 | Iterator i; | |
2080 | void *e; | |
2081 | ||
2082 | assert(u); | |
2083 | ||
2084 | /* Cleans dead PIDs from our list */ | |
2085 | ||
2086 | SET_FOREACH(e, u->pids, i) { | |
2087 | pid_t pid = PTR_TO_LONG(e); | |
2088 | ||
2089 | if (pid == except1 || pid == except2) | |
2090 | continue; | |
2091 | ||
9f5650ae | 2092 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2093 | unit_unwatch_pid(u, pid); |
a911bb9a | 2094 | } |
87f0e418 LP |
2095 | } |
2096 | ||
87f0e418 LP |
2097 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2098 | assert(u); | |
2099 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2100 | ||
2101 | switch (j) { | |
2102 | ||
2103 | case JOB_VERIFY_ACTIVE: | |
2104 | case JOB_START: | |
57339f47 | 2105 | case JOB_STOP: |
e0209d83 | 2106 | case JOB_NOP: |
87f0e418 LP |
2107 | return true; |
2108 | ||
87f0e418 LP |
2109 | case JOB_RESTART: |
2110 | case JOB_TRY_RESTART: | |
2111 | return unit_can_start(u); | |
2112 | ||
2113 | case JOB_RELOAD: | |
2114 | return unit_can_reload(u); | |
2115 | ||
2116 | case JOB_RELOAD_OR_START: | |
2117 | return unit_can_reload(u) && unit_can_start(u); | |
2118 | ||
2119 | default: | |
2120 | assert_not_reached("Invalid job type"); | |
2121 | } | |
2122 | } | |
2123 | ||
d1fab3fe | 2124 | static int maybe_warn_about_dependency(const char *id, const char *other, UnitDependency dependency) { |
3f3cc397 LP |
2125 | assert(id); |
2126 | ||
d1fab3fe ZJS |
2127 | switch (dependency) { |
2128 | case UNIT_REQUIRES: | |
2129 | case UNIT_REQUIRES_OVERRIDABLE: | |
2130 | case UNIT_WANTS: | |
2131 | case UNIT_REQUISITE: | |
2132 | case UNIT_REQUISITE_OVERRIDABLE: | |
2133 | case UNIT_BINDS_TO: | |
2134 | case UNIT_PART_OF: | |
2135 | case UNIT_REQUIRED_BY: | |
2136 | case UNIT_REQUIRED_BY_OVERRIDABLE: | |
2137 | case UNIT_WANTED_BY: | |
2138 | case UNIT_BOUND_BY: | |
2139 | case UNIT_CONSISTS_OF: | |
2140 | case UNIT_REFERENCES: | |
2141 | case UNIT_REFERENCED_BY: | |
2142 | case UNIT_PROPAGATES_RELOAD_TO: | |
2143 | case UNIT_RELOAD_PROPAGATED_FROM: | |
2144 | case UNIT_JOINS_NAMESPACE_OF: | |
2145 | return 0; | |
2146 | ||
2147 | case UNIT_CONFLICTS: | |
2148 | case UNIT_CONFLICTED_BY: | |
2149 | case UNIT_BEFORE: | |
2150 | case UNIT_AFTER: | |
2151 | case UNIT_ON_FAILURE: | |
2152 | case UNIT_TRIGGERS: | |
2153 | case UNIT_TRIGGERED_BY: | |
2154 | if (streq_ptr(id, other)) | |
79008bdd | 2155 | log_unit_warning(id, "Dependency %s=%s dropped from unit %s", |
d1fab3fe ZJS |
2156 | unit_dependency_to_string(dependency), id, other); |
2157 | else | |
79008bdd | 2158 | log_unit_warning(id, "Dependency %s=%s dropped from unit %s merged into %s", |
d1fab3fe ZJS |
2159 | unit_dependency_to_string(dependency), id, |
2160 | strna(other), id); | |
2161 | return -EINVAL; | |
2162 | ||
2163 | case _UNIT_DEPENDENCY_MAX: | |
2164 | case _UNIT_DEPENDENCY_INVALID: | |
2165 | break; | |
2166 | } | |
3f3cc397 | 2167 | |
d1fab3fe ZJS |
2168 | assert_not_reached("Invalid dependency type"); |
2169 | } | |
2170 | ||
701cc384 | 2171 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2172 | |
2173 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2174 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2175 | [UNIT_REQUIRES_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
87f0e418 LP |
2176 | [UNIT_WANTS] = UNIT_WANTED_BY, |
2177 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
9e2f7c11 | 2178 | [UNIT_REQUISITE_OVERRIDABLE] = UNIT_REQUIRED_BY_OVERRIDABLE, |
7f2cddae | 2179 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2180 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
87f0e418 | 2181 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, |
9e2f7c11 | 2182 | [UNIT_REQUIRED_BY_OVERRIDABLE] = _UNIT_DEPENDENCY_INVALID, |
87f0e418 | 2183 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, |
7f2cddae | 2184 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2185 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2186 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2187 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2188 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2189 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2190 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2191 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2192 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2193 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2194 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2195 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2196 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2197 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2198 | }; |
701cc384 | 2199 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2200 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2201 | |
2202 | assert(u); | |
2203 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2204 | assert(other); |
2205 | ||
9f151f29 LP |
2206 | u = unit_follow_merge(u); |
2207 | other = unit_follow_merge(other); | |
2208 | ||
87f0e418 LP |
2209 | /* We won't allow dependencies on ourselves. We will not |
2210 | * consider them an error however. */ | |
d1fab3fe ZJS |
2211 | if (u == other) { |
2212 | maybe_warn_about_dependency(orig_u->id, orig_other->id, d); | |
87f0e418 | 2213 | return 0; |
d1fab3fe | 2214 | } |
87f0e418 | 2215 | |
d5099efc | 2216 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2217 | if (r < 0) |
87f0e418 LP |
2218 | return r; |
2219 | ||
613b411c | 2220 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2221 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2222 | if (r < 0) |
2223 | return r; | |
2224 | } | |
2225 | ||
2226 | if (add_reference) { | |
d5099efc | 2227 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2228 | if (r < 0) |
5de9682c LP |
2229 | return r; |
2230 | ||
d5099efc | 2231 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2232 | if (r < 0) |
701cc384 | 2233 | return r; |
613b411c | 2234 | } |
87f0e418 | 2235 | |
613b411c LP |
2236 | q = set_put(u->dependencies[d], other); |
2237 | if (q < 0) | |
701cc384 | 2238 | return q; |
87f0e418 | 2239 | |
613b411c LP |
2240 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2241 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2242 | if (v < 0) { | |
5de9682c LP |
2243 | r = v; |
2244 | goto fail; | |
2245 | } | |
613b411c | 2246 | } |
701cc384 LP |
2247 | |
2248 | if (add_reference) { | |
613b411c LP |
2249 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2250 | if (w < 0) { | |
701cc384 LP |
2251 | r = w; |
2252 | goto fail; | |
2253 | } | |
2254 | ||
613b411c LP |
2255 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2256 | if (r < 0) | |
701cc384 | 2257 | goto fail; |
87f0e418 LP |
2258 | } |
2259 | ||
c1e1601e | 2260 | unit_add_to_dbus_queue(u); |
87f0e418 | 2261 | return 0; |
701cc384 LP |
2262 | |
2263 | fail: | |
2264 | if (q > 0) | |
ac155bb8 | 2265 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2266 | |
2267 | if (v > 0) | |
ac155bb8 | 2268 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2269 | |
2270 | if (w > 0) | |
ac155bb8 | 2271 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2272 | |
2273 | return r; | |
87f0e418 | 2274 | } |
0301abf4 | 2275 | |
2c966c03 LP |
2276 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2277 | int r; | |
2278 | ||
2279 | assert(u); | |
2280 | ||
3f3cc397 LP |
2281 | r = unit_add_dependency(u, d, other, add_reference); |
2282 | if (r < 0) | |
2c966c03 LP |
2283 | return r; |
2284 | ||
3f3cc397 LP |
2285 | r = unit_add_dependency(u, e, other, add_reference); |
2286 | if (r < 0) | |
2c966c03 LP |
2287 | return r; |
2288 | ||
2289 | return 0; | |
2290 | } | |
2291 | ||
9e2f7c11 LP |
2292 | static const char *resolve_template(Unit *u, const char *name, const char*path, char **p) { |
2293 | char *s; | |
2294 | ||
2295 | assert(u); | |
2296 | assert(name || path); | |
8afbb8e1 | 2297 | assert(p); |
9e2f7c11 LP |
2298 | |
2299 | if (!name) | |
2b6bf07d | 2300 | name = basename(path); |
9e2f7c11 LP |
2301 | |
2302 | if (!unit_name_is_template(name)) { | |
2303 | *p = NULL; | |
2304 | return name; | |
2305 | } | |
2306 | ||
ac155bb8 MS |
2307 | if (u->instance) |
2308 | s = unit_name_replace_instance(name, u->instance); | |
9e2f7c11 | 2309 | else { |
ae018d9b | 2310 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2311 | |
8afbb8e1 LP |
2312 | i = unit_name_to_prefix(u->id); |
2313 | if (!i) | |
9e2f7c11 LP |
2314 | return NULL; |
2315 | ||
2316 | s = unit_name_replace_instance(name, i); | |
9e2f7c11 LP |
2317 | } |
2318 | ||
2319 | if (!s) | |
2320 | return NULL; | |
2321 | ||
2322 | *p = s; | |
2323 | return s; | |
2324 | } | |
2325 | ||
701cc384 | 2326 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
09b6b09f LP |
2327 | Unit *other; |
2328 | int r; | |
8afbb8e1 | 2329 | _cleanup_free_ char *s = NULL; |
09b6b09f | 2330 | |
9e2f7c11 LP |
2331 | assert(u); |
2332 | assert(name || path); | |
09b6b09f | 2333 | |
8afbb8e1 LP |
2334 | name = resolve_template(u, name, path, &s); |
2335 | if (!name) | |
9e2f7c11 | 2336 | return -ENOMEM; |
09b6b09f | 2337 | |
8afbb8e1 LP |
2338 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2339 | if (r < 0) | |
2340 | return r; | |
9e2f7c11 | 2341 | |
8afbb8e1 | 2342 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2343 | } |
2344 | ||
2c966c03 | 2345 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
3f3cc397 | 2346 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2347 | Unit *other; |
2348 | int r; | |
2c966c03 LP |
2349 | |
2350 | assert(u); | |
2351 | assert(name || path); | |
2352 | ||
3f3cc397 LP |
2353 | name = resolve_template(u, name, path, &s); |
2354 | if (!name) | |
2c966c03 LP |
2355 | return -ENOMEM; |
2356 | ||
3f3cc397 LP |
2357 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2358 | if (r < 0) | |
68eda4bd | 2359 | return r; |
2c966c03 | 2360 | |
3f3cc397 | 2361 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2362 | } |
2363 | ||
701cc384 | 2364 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
bd77d0fc LP |
2365 | Unit *other; |
2366 | int r; | |
68eda4bd | 2367 | _cleanup_free_ char *s = NULL; |
bd77d0fc | 2368 | |
9e2f7c11 LP |
2369 | assert(u); |
2370 | assert(name || path); | |
bd77d0fc | 2371 | |
3f3cc397 LP |
2372 | name = resolve_template(u, name, path, &s); |
2373 | if (!name) | |
9e2f7c11 | 2374 | return -ENOMEM; |
bd77d0fc | 2375 | |
3f3cc397 LP |
2376 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2377 | if (r < 0) | |
68eda4bd | 2378 | return r; |
9e2f7c11 | 2379 | |
3f3cc397 | 2380 | return unit_add_dependency(other, d, u, add_reference); |
bd77d0fc LP |
2381 | } |
2382 | ||
2c966c03 LP |
2383 | int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
2384 | Unit *other; | |
2385 | int r; | |
68eda4bd | 2386 | _cleanup_free_ char *s = NULL; |
2c966c03 LP |
2387 | |
2388 | assert(u); | |
2389 | assert(name || path); | |
2390 | ||
3f3cc397 LP |
2391 | name = resolve_template(u, name, path, &s); |
2392 | if (!name) | |
2c966c03 LP |
2393 | return -ENOMEM; |
2394 | ||
3f3cc397 LP |
2395 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2396 | if (r < 0) | |
68eda4bd | 2397 | return r; |
2c966c03 | 2398 | |
3f3cc397 LP |
2399 | r = unit_add_two_dependencies(other, d, e, u, add_reference); |
2400 | if (r < 0) | |
68eda4bd | 2401 | return r; |
2c966c03 | 2402 | |
2c966c03 LP |
2403 | return r; |
2404 | } | |
2405 | ||
0301abf4 | 2406 | int set_unit_path(const char *p) { |
0301abf4 | 2407 | /* This is mostly for debug purposes */ |
cf7d80a5 | 2408 | if (setenv("SYSTEMD_UNIT_PATH", p, 0) < 0) |
26d04f86 | 2409 | return -errno; |
0301abf4 LP |
2410 | |
2411 | return 0; | |
2412 | } | |
88066b3a | 2413 | |
ea430986 | 2414 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2415 | assert(u); |
2416 | ||
ac155bb8 | 2417 | if (!u->id) |
04ade7d2 LP |
2418 | return NULL; |
2419 | ||
48899192 | 2420 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2421 | } |
2422 | ||
41f9172f | 2423 | char *unit_default_cgroup_path(Unit *u) { |
d7bd3de0 | 2424 | _cleanup_free_ char *escaped = NULL, *slice = NULL; |
a016b922 | 2425 | int r; |
5954c074 | 2426 | |
013b87c0 LP |
2427 | assert(u); |
2428 | ||
4ad49000 LP |
2429 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
2430 | return strdup(u->manager->cgroup_root); | |
2431 | ||
2432 | if (UNIT_ISSET(u->slice) && !unit_has_name(UNIT_DEREF(u->slice), SPECIAL_ROOT_SLICE)) { | |
a016b922 LP |
2433 | r = cg_slice_to_path(UNIT_DEREF(u->slice)->id, &slice); |
2434 | if (r < 0) | |
2435 | return NULL; | |
2436 | } | |
2437 | ||
d7bd3de0 LP |
2438 | escaped = cg_escape(u->id); |
2439 | if (!escaped) | |
5954c074 LP |
2440 | return NULL; |
2441 | ||
d7bd3de0 LP |
2442 | if (slice) |
2443 | return strjoin(u->manager->cgroup_root, "/", slice, "/", escaped, NULL); | |
2444 | else | |
2445 | return strjoin(u->manager->cgroup_root, "/", escaped, NULL); | |
013b87c0 LP |
2446 | } |
2447 | ||
598459ce | 2448 | int unit_add_default_slice(Unit *u, CGroupContext *c) { |
a8833944 LP |
2449 | _cleanup_free_ char *b = NULL; |
2450 | const char *slice_name; | |
a016b922 LP |
2451 | Unit *slice; |
2452 | int r; | |
2453 | ||
2454 | assert(u); | |
598459ce | 2455 | assert(c); |
a016b922 | 2456 | |
9444b1f2 | 2457 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2458 | return 0; |
2459 | ||
a8833944 LP |
2460 | if (u->instance) { |
2461 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2462 | |
a8833944 LP |
2463 | /* Implicitly place all instantiated units in their |
2464 | * own per-template slice */ | |
2465 | ||
2466 | prefix = unit_name_to_prefix(u->id); | |
2467 | if (!prefix) | |
2468 | return -ENOMEM; | |
2469 | ||
2470 | /* The prefix is already escaped, but it might include | |
2471 | * "-" which has a special meaning for slice units, | |
2472 | * hence escape it here extra. */ | |
2473 | escaped = strreplace(prefix, "-", "\\x2d"); | |
2474 | if (!escaped) | |
2475 | return -ENOMEM; | |
2476 | ||
2477 | if (u->manager->running_as == SYSTEMD_SYSTEM) | |
2478 | b = strjoin("system-", escaped, ".slice", NULL); | |
2479 | else | |
2480 | b = strappend(escaped, ".slice"); | |
2481 | if (!b) | |
2482 | return -ENOMEM; | |
2483 | ||
2484 | slice_name = b; | |
2485 | } else | |
2486 | slice_name = | |
2487 | u->manager->running_as == SYSTEMD_SYSTEM | |
2488 | ? SPECIAL_SYSTEM_SLICE | |
2489 | : SPECIAL_ROOT_SLICE; | |
2490 | ||
2491 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2492 | if (r < 0) |
2493 | return r; | |
2494 | ||
2495 | unit_ref_set(&u->slice, slice); | |
2496 | return 0; | |
2497 | } | |
2498 | ||
9444b1f2 LP |
2499 | const char *unit_slice_name(Unit *u) { |
2500 | assert(u); | |
2501 | ||
2502 | if (!UNIT_ISSET(u->slice)) | |
2503 | return NULL; | |
2504 | ||
2505 | return UNIT_DEREF(u->slice)->id; | |
2506 | } | |
2507 | ||
f6ff8c29 | 2508 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2509 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2510 | int r; |
2511 | ||
2512 | assert(u); | |
2513 | assert(type); | |
2514 | assert(_found); | |
2515 | ||
78edb35a LP |
2516 | t = unit_name_change_suffix(u->id, type); |
2517 | if (!t) | |
f6ff8c29 LP |
2518 | return -ENOMEM; |
2519 | ||
2520 | assert(!unit_has_name(u, t)); | |
2521 | ||
ac155bb8 | 2522 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2523 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2524 | return r; |
2525 | } | |
2526 | ||
05e343b7 LP |
2527 | int unit_watch_bus_name(Unit *u, const char *name) { |
2528 | assert(u); | |
2529 | assert(name); | |
2530 | ||
2531 | /* Watch a specific name on the bus. We only support one unit | |
2532 | * watching each name for now. */ | |
2533 | ||
ac155bb8 | 2534 | return hashmap_put(u->manager->watch_bus, name, u); |
05e343b7 LP |
2535 | } |
2536 | ||
2537 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2538 | assert(u); | |
2539 | assert(name); | |
2540 | ||
ac155bb8 | 2541 | hashmap_remove_value(u->manager->watch_bus, name, u); |
05e343b7 LP |
2542 | } |
2543 | ||
a16e1123 LP |
2544 | bool unit_can_serialize(Unit *u) { |
2545 | assert(u); | |
2546 | ||
2547 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2548 | } | |
2549 | ||
6b78f9b4 | 2550 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2551 | int r; |
2552 | ||
2553 | assert(u); | |
2554 | assert(f); | |
2555 | assert(fds); | |
2556 | ||
9bdb98c5 LP |
2557 | if (unit_can_serialize(u)) { |
2558 | ExecRuntime *rt; | |
a16e1123 | 2559 | |
9bdb98c5 | 2560 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2561 | if (r < 0) |
2562 | return r; | |
9bdb98c5 LP |
2563 | |
2564 | rt = unit_get_exec_runtime(u); | |
2565 | if (rt) { | |
2566 | r = exec_runtime_serialize(rt, u, f, fds); | |
2567 | if (r < 0) | |
2568 | return r; | |
2569 | } | |
e0209d83 MS |
2570 | } |
2571 | ||
ac155bb8 MS |
2572 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2573 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2574 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2575 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
2576 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); | |
59fccdc5 | 2577 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2578 | |
ac155bb8 MS |
2579 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2580 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2581 | |
59fccdc5 LP |
2582 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2583 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2584 | ||
c2756a68 LP |
2585 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
2586 | ||
2587 | if (u->cgroup_path) | |
2588 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
2589 | ||
613b411c LP |
2590 | if (serialize_jobs) { |
2591 | if (u->job) { | |
2592 | fprintf(f, "job\n"); | |
2593 | job_serialize(u->job, f, fds); | |
2594 | } | |
2595 | ||
2596 | if (u->nop_job) { | |
2597 | fprintf(f, "job\n"); | |
2598 | job_serialize(u->nop_job, f, fds); | |
2599 | } | |
2600 | } | |
2601 | ||
a16e1123 LP |
2602 | /* End marker */ |
2603 | fputc('\n', f); | |
2604 | return 0; | |
2605 | } | |
2606 | ||
2607 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { | |
2608 | va_list ap; | |
2609 | ||
2610 | assert(u); | |
2611 | assert(f); | |
2612 | assert(key); | |
2613 | assert(format); | |
2614 | ||
2615 | fputs(key, f); | |
2616 | fputc('=', f); | |
2617 | ||
2618 | va_start(ap, format); | |
2619 | vfprintf(f, format, ap); | |
2620 | va_end(ap); | |
2621 | ||
2622 | fputc('\n', f); | |
2623 | } | |
2624 | ||
2625 | void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { | |
2626 | assert(u); | |
2627 | assert(f); | |
2628 | assert(key); | |
2629 | assert(value); | |
2630 | ||
2631 | fprintf(f, "%s=%s\n", key, value); | |
2632 | } | |
2633 | ||
2634 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { | |
28b99ccd | 2635 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2636 | size_t offset; |
a16e1123 LP |
2637 | int r; |
2638 | ||
2639 | assert(u); | |
2640 | assert(f); | |
2641 | assert(fds); | |
2642 | ||
613b411c LP |
2643 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2644 | if (offset > 0) | |
2645 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2646 | ||
a16e1123 | 2647 | for (;;) { |
20c03b7b | 2648 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2649 | size_t k; |
2650 | ||
2651 | if (!fgets(line, sizeof(line), f)) { | |
2652 | if (feof(f)) | |
2653 | return 0; | |
2654 | return -errno; | |
2655 | } | |
2656 | ||
10f8e83c | 2657 | char_array_0(line); |
a16e1123 LP |
2658 | l = strstrip(line); |
2659 | ||
2660 | /* End marker */ | |
2661 | if (l[0] == 0) | |
2662 | return 0; | |
2663 | ||
2664 | k = strcspn(l, "="); | |
2665 | ||
2666 | if (l[k] == '=') { | |
2667 | l[k] = 0; | |
2668 | v = l+k+1; | |
2669 | } else | |
2670 | v = l+k; | |
2671 | ||
cca098b0 | 2672 | if (streq(l, "job")) { |
39a18c60 MS |
2673 | if (v[0] == '\0') { |
2674 | /* new-style serialized job */ | |
2675 | Job *j = job_new_raw(u); | |
2676 | if (!j) | |
2677 | return -ENOMEM; | |
2678 | ||
2679 | r = job_deserialize(j, f, fds); | |
2680 | if (r < 0) { | |
2681 | job_free(j); | |
2682 | return r; | |
2683 | } | |
cca098b0 | 2684 | |
39a18c60 MS |
2685 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2686 | if (r < 0) { | |
2687 | job_free(j); | |
2688 | return r; | |
2689 | } | |
e0209d83 MS |
2690 | |
2691 | r = job_install_deserialized(j); | |
2692 | if (r < 0) { | |
2693 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2694 | job_free(j); | |
2695 | return r; | |
2696 | } | |
6b19ad24 MS |
2697 | |
2698 | if (j->state == JOB_RUNNING) | |
2699 | u->manager->n_running_jobs++; | |
39a18c60 MS |
2700 | } else { |
2701 | /* legacy */ | |
2702 | JobType type = job_type_from_string(v); | |
2703 | if (type < 0) | |
2704 | log_debug("Failed to parse job type value %s", v); | |
2705 | else | |
2706 | u->deserialized_job = type; | |
2707 | } | |
cca098b0 | 2708 | continue; |
8aaf019b | 2709 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2710 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2711 | continue; |
2712 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2713 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2714 | continue; |
2715 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2716 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2717 | continue; |
2718 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2719 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2720 | continue; |
2791a8f8 | 2721 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2722 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2723 | continue; |
59fccdc5 LP |
2724 | } else if (streq(l, "assert-timestamp")) { |
2725 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2726 | continue; | |
2791a8f8 LP |
2727 | } else if (streq(l, "condition-result")) { |
2728 | int b; | |
2729 | ||
c2756a68 LP |
2730 | b = parse_boolean(v); |
2731 | if (b < 0) | |
2791a8f8 LP |
2732 | log_debug("Failed to parse condition result value %s", v); |
2733 | else | |
ac155bb8 | 2734 | u->condition_result = b; |
efbac6d2 LP |
2735 | |
2736 | continue; | |
c2756a68 | 2737 | |
59fccdc5 LP |
2738 | } else if (streq(l, "assert-result")) { |
2739 | int b; | |
2740 | ||
2741 | b = parse_boolean(v); | |
2742 | if (b < 0) | |
2743 | log_debug("Failed to parse assert result value %s", v); | |
2744 | else | |
2745 | u->assert_result = b; | |
2746 | ||
2747 | continue; | |
2748 | ||
c2756a68 LP |
2749 | } else if (streq(l, "transient")) { |
2750 | int b; | |
2751 | ||
2752 | b = parse_boolean(v); | |
2753 | if (b < 0) | |
2754 | log_debug("Failed to parse transient bool %s", v); | |
2755 | else | |
2756 | u->transient = b; | |
2757 | ||
2758 | continue; | |
2759 | } else if (streq(l, "cgroup")) { | |
2760 | char *s; | |
2761 | ||
2762 | s = strdup(v); | |
f440e1bb | 2763 | if (!s) |
c2756a68 LP |
2764 | return -ENOMEM; |
2765 | ||
4e595329 ZJS |
2766 | if (u->cgroup_path) { |
2767 | void *p; | |
2768 | ||
2769 | p = hashmap_remove(u->manager->cgroup_unit, u->cgroup_path); | |
2770 | log_info("Removing cgroup_path %s from hashmap (%p)", | |
2771 | u->cgroup_path, p); | |
2772 | free(u->cgroup_path); | |
2773 | } | |
72673e86 | 2774 | |
4e595329 | 2775 | u->cgroup_path = s; |
b58b8e11 | 2776 | assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1); |
4e595329 | 2777 | |
c2756a68 | 2778 | continue; |
8aaf019b | 2779 | } |
cca098b0 | 2780 | |
9bdb98c5 LP |
2781 | if (unit_can_serialize(u)) { |
2782 | if (rt) { | |
2783 | r = exec_runtime_deserialize_item(rt, u, l, v, fds); | |
2784 | if (r < 0) | |
2785 | return r; | |
2786 | if (r > 0) | |
2787 | continue; | |
2788 | } | |
2789 | ||
2790 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c LP |
2791 | if (r < 0) |
2792 | return r; | |
613b411c | 2793 | } |
a16e1123 LP |
2794 | } |
2795 | } | |
2796 | ||
6e2ef85b LP |
2797 | int unit_add_node_link(Unit *u, const char *what, bool wants) { |
2798 | Unit *device; | |
68eda4bd | 2799 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2800 | int r; |
2801 | ||
2802 | assert(u); | |
2803 | ||
2804 | if (!what) | |
2805 | return 0; | |
2806 | ||
2807 | /* Adds in links to the device node that this unit is based on */ | |
2808 | ||
8407a5d0 | 2809 | if (!is_device_path(what)) |
6e2ef85b LP |
2810 | return 0; |
2811 | ||
35eb6b12 LP |
2812 | e = unit_name_from_path(what, ".device"); |
2813 | if (!e) | |
6e2ef85b LP |
2814 | return -ENOMEM; |
2815 | ||
ac155bb8 | 2816 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
68eda4bd | 2817 | |
6e2ef85b LP |
2818 | if (r < 0) |
2819 | return r; | |
2820 | ||
faa368e3 LP |
2821 | r = unit_add_two_dependencies(u, UNIT_AFTER, UNIT_BINDS_TO, device, true); |
2822 | if (r < 0) | |
6e2ef85b LP |
2823 | return r; |
2824 | ||
faa368e3 LP |
2825 | if (wants) { |
2826 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2827 | if (r < 0) | |
6e2ef85b | 2828 | return r; |
faa368e3 | 2829 | } |
6e2ef85b LP |
2830 | |
2831 | return 0; | |
2832 | } | |
a16e1123 | 2833 | |
cca098b0 LP |
2834 | int unit_coldplug(Unit *u) { |
2835 | int r; | |
2836 | ||
2837 | assert(u); | |
2838 | ||
2839 | if (UNIT_VTABLE(u)->coldplug) | |
2840 | if ((r = UNIT_VTABLE(u)->coldplug(u)) < 0) | |
2841 | return r; | |
2842 | ||
39a18c60 MS |
2843 | if (u->job) { |
2844 | r = job_coldplug(u->job); | |
2845 | if (r < 0) | |
2846 | return r; | |
2847 | } else if (u->deserialized_job >= 0) { | |
2848 | /* legacy */ | |
2849 | r = manager_add_job(u->manager, u->deserialized_job, u, JOB_IGNORE_REQUIREMENTS, false, NULL, NULL); | |
2850 | if (r < 0) | |
cca098b0 LP |
2851 | return r; |
2852 | ||
ac155bb8 | 2853 | u->deserialized_job = _JOB_TYPE_INVALID; |
cca098b0 LP |
2854 | } |
2855 | ||
2856 | return 0; | |
2857 | } | |
2858 | ||
49b1d377 | 2859 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
bcfce235 | 2860 | DISABLE_WARNING_FORMAT_NONLITERAL; |
127d5fd1 ZJS |
2861 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, |
2862 | status, unit_status_msg_format, unit_description(u)); | |
bcfce235 | 2863 | REENABLE_WARNING; |
49b1d377 MS |
2864 | } |
2865 | ||
45fb0699 | 2866 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
2867 | _cleanup_strv_free_ char **t = NULL; |
2868 | char **path; | |
1b64d026 | 2869 | struct stat st; |
ae7a7182 | 2870 | unsigned loaded_cnt, current_cnt; |
1b64d026 | 2871 | |
45fb0699 LP |
2872 | assert(u); |
2873 | ||
ac155bb8 | 2874 | if (u->fragment_path) { |
5f4b19f4 | 2875 | zero(st); |
ac155bb8 | 2876 | if (stat(u->fragment_path, &st) < 0) |
5f4b19f4 LP |
2877 | /* What, cannot access this anymore? */ |
2878 | return true; | |
45fb0699 | 2879 | |
ac155bb8 MS |
2880 | if (u->fragment_mtime > 0 && |
2881 | timespec_load(&st.st_mtim) != u->fragment_mtime) | |
5f4b19f4 LP |
2882 | return true; |
2883 | } | |
2884 | ||
1b64d026 LP |
2885 | if (u->source_path) { |
2886 | zero(st); | |
2887 | if (stat(u->source_path, &st) < 0) | |
2888 | return true; | |
2889 | ||
2890 | if (u->source_mtime > 0 && | |
2891 | timespec_load(&st.st_mtim) != u->source_mtime) | |
2892 | return true; | |
2893 | } | |
5f4b19f4 | 2894 | |
ae7a7182 OS |
2895 | t = unit_find_dropin_paths(u); |
2896 | loaded_cnt = strv_length(t); | |
2897 | current_cnt = strv_length(u->dropin_paths); | |
2898 | ||
2899 | if (loaded_cnt == current_cnt) { | |
2900 | if (loaded_cnt == 0) | |
2901 | return false; | |
2902 | ||
2903 | if (strv_overlap(u->dropin_paths, t)) { | |
2904 | STRV_FOREACH(path, u->dropin_paths) { | |
2905 | zero(st); | |
2906 | if (stat(*path, &st) < 0) | |
2907 | return true; | |
2908 | ||
2909 | if (u->dropin_mtime > 0 && | |
2910 | timespec_load(&st.st_mtim) > u->dropin_mtime) | |
2911 | return true; | |
2912 | } | |
2913 | ||
2914 | return false; | |
2915 | } else | |
2916 | return true; | |
2917 | } else | |
2918 | return true; | |
45fb0699 LP |
2919 | } |
2920 | ||
fdf20a31 | 2921 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
2922 | assert(u); |
2923 | ||
fdf20a31 MM |
2924 | if (UNIT_VTABLE(u)->reset_failed) |
2925 | UNIT_VTABLE(u)->reset_failed(u); | |
5632e374 LP |
2926 | } |
2927 | ||
a7f241db LP |
2928 | Unit *unit_following(Unit *u) { |
2929 | assert(u); | |
2930 | ||
2931 | if (UNIT_VTABLE(u)->following) | |
2932 | return UNIT_VTABLE(u)->following(u); | |
2933 | ||
2934 | return NULL; | |
2935 | } | |
2936 | ||
31afa0a4 | 2937 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
2938 | assert(u); |
2939 | ||
31afa0a4 LP |
2940 | /* This call does check the current state of the unit. It's |
2941 | * hence useful to be called from state change calls of the | |
2942 | * unit itself, where the state isn't updated yet. This is | |
2943 | * different from unit_inactive_or_pending() which checks both | |
2944 | * the current state and for a queued job. */ | |
18ffdfda | 2945 | |
31afa0a4 LP |
2946 | return u->job && u->job->type == JOB_STOP; |
2947 | } | |
2948 | ||
2949 | bool unit_inactive_or_pending(Unit *u) { | |
2950 | assert(u); | |
2951 | ||
2952 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 2953 | |
d956ac29 LP |
2954 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
2955 | return true; | |
2956 | ||
31afa0a4 | 2957 | if (unit_stop_pending(u)) |
18ffdfda LP |
2958 | return true; |
2959 | ||
2960 | return false; | |
2961 | } | |
2962 | ||
31afa0a4 | 2963 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
2964 | assert(u); |
2965 | ||
f60c2665 | 2966 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
2967 | |
2968 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
2969 | return true; | |
2970 | ||
ac155bb8 MS |
2971 | if (u->job && |
2972 | (u->job->type == JOB_START || | |
2973 | u->job->type == JOB_RELOAD_OR_START || | |
2974 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
2975 | return true; |
2976 | ||
2977 | return false; | |
2978 | } | |
2979 | ||
718db961 | 2980 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
2981 | assert(u); |
2982 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
8a0867d6 LP |
2983 | assert(signo > 0); |
2984 | assert(signo < _NSIG); | |
2985 | ||
8a0867d6 LP |
2986 | if (!UNIT_VTABLE(u)->kill) |
2987 | return -ENOTSUP; | |
2988 | ||
c74f17d9 | 2989 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
2990 | } |
2991 | ||
82659fd7 LP |
2992 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
2993 | Set *pid_set; | |
2994 | int r; | |
2995 | ||
d5099efc | 2996 | pid_set = set_new(NULL); |
82659fd7 LP |
2997 | if (!pid_set) |
2998 | return NULL; | |
2999 | ||
3000 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3001 | if (main_pid > 0) { | |
3002 | r = set_put(pid_set, LONG_TO_PTR(main_pid)); | |
3003 | if (r < 0) | |
3004 | goto fail; | |
3005 | } | |
3006 | ||
3007 | if (control_pid > 0) { | |
3008 | r = set_put(pid_set, LONG_TO_PTR(control_pid)); | |
3009 | if (r < 0) | |
3010 | goto fail; | |
3011 | } | |
3012 | ||
3013 | return pid_set; | |
3014 | ||
3015 | fail: | |
3016 | set_free(pid_set); | |
3017 | return NULL; | |
3018 | } | |
3019 | ||
d91c34f2 LP |
3020 | int unit_kill_common( |
3021 | Unit *u, | |
3022 | KillWho who, | |
3023 | int signo, | |
3024 | pid_t main_pid, | |
3025 | pid_t control_pid, | |
718db961 | 3026 | sd_bus_error *error) { |
d91c34f2 | 3027 | |
814cc562 MS |
3028 | int r = 0; |
3029 | ||
3030 | if (who == KILL_MAIN && main_pid <= 0) { | |
3031 | if (main_pid < 0) | |
7358dc02 | 3032 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
814cc562 | 3033 | else |
7358dc02 | 3034 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3035 | } |
3036 | ||
3037 | if (who == KILL_CONTROL && control_pid <= 0) { | |
3038 | if (control_pid < 0) | |
7358dc02 | 3039 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
814cc562 | 3040 | else |
7358dc02 | 3041 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3042 | } |
3043 | ||
3044 | if (who == KILL_CONTROL || who == KILL_ALL) | |
3045 | if (control_pid > 0) | |
3046 | if (kill(control_pid, signo) < 0) | |
3047 | r = -errno; | |
3048 | ||
3049 | if (who == KILL_MAIN || who == KILL_ALL) | |
3050 | if (main_pid > 0) | |
3051 | if (kill(main_pid, signo) < 0) | |
3052 | r = -errno; | |
3053 | ||
4ad49000 | 3054 | if (who == KILL_ALL && u->cgroup_path) { |
814cc562 MS |
3055 | _cleanup_set_free_ Set *pid_set = NULL; |
3056 | int q; | |
3057 | ||
82659fd7 LP |
3058 | /* Exclude the main/control pids from being killed via the cgroup */ |
3059 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3060 | if (!pid_set) |
3061 | return -ENOMEM; | |
3062 | ||
4ad49000 | 3063 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, false, true, false, pid_set); |
814cc562 MS |
3064 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3065 | r = q; | |
3066 | } | |
3067 | ||
3068 | return r; | |
3069 | } | |
3070 | ||
6210e7fc LP |
3071 | int unit_following_set(Unit *u, Set **s) { |
3072 | assert(u); | |
3073 | assert(s); | |
3074 | ||
3075 | if (UNIT_VTABLE(u)->following_set) | |
3076 | return UNIT_VTABLE(u)->following_set(u, s); | |
3077 | ||
3078 | *s = NULL; | |
3079 | return 0; | |
3080 | } | |
3081 | ||
a4375746 LP |
3082 | UnitFileState unit_get_unit_file_state(Unit *u) { |
3083 | assert(u); | |
3084 | ||
ac155bb8 MS |
3085 | if (u->unit_file_state < 0 && u->fragment_path) |
3086 | u->unit_file_state = unit_file_get_state( | |
67445f4e | 3087 | u->manager->running_as == SYSTEMD_SYSTEM ? UNIT_FILE_SYSTEM : UNIT_FILE_USER, |
2b6bf07d | 3088 | NULL, basename(u->fragment_path)); |
a4375746 | 3089 | |
ac155bb8 | 3090 | return u->unit_file_state; |
a4375746 LP |
3091 | } |
3092 | ||
57020a3a LP |
3093 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3094 | assert(ref); | |
3095 | assert(u); | |
3096 | ||
3097 | if (ref->unit) | |
3098 | unit_ref_unset(ref); | |
3099 | ||
3100 | ref->unit = u; | |
71fda00f | 3101 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3102 | return u; |
3103 | } | |
3104 | ||
3105 | void unit_ref_unset(UnitRef *ref) { | |
3106 | assert(ref); | |
3107 | ||
3108 | if (!ref->unit) | |
3109 | return; | |
3110 | ||
71fda00f | 3111 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3112 | ref->unit = NULL; |
3113 | } | |
3114 | ||
598459ce LP |
3115 | int unit_patch_contexts(Unit *u) { |
3116 | CGroupContext *cc; | |
3117 | ExecContext *ec; | |
cba6e062 LP |
3118 | unsigned i; |
3119 | int r; | |
3120 | ||
e06c73cc | 3121 | assert(u); |
e06c73cc | 3122 | |
598459ce LP |
3123 | /* Patch in the manager defaults into the exec and cgroup |
3124 | * contexts, _after_ the rest of the settings have been | |
3125 | * initialized */ | |
085afe36 | 3126 | |
598459ce LP |
3127 | ec = unit_get_exec_context(u); |
3128 | if (ec) { | |
3129 | /* This only copies in the ones that need memory */ | |
3130 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3131 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3132 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3133 | if (!ec->rlimit[i]) | |
3134 | return -ENOMEM; | |
3135 | } | |
3136 | ||
3137 | if (u->manager->running_as == SYSTEMD_USER && | |
3138 | !ec->working_directory) { | |
3139 | ||
3140 | r = get_home_dir(&ec->working_directory); | |
3141 | if (r < 0) | |
3142 | return r; | |
cba6e062 LP |
3143 | } |
3144 | ||
598459ce LP |
3145 | if (u->manager->running_as == SYSTEMD_USER && |
3146 | (ec->syscall_whitelist || | |
3147 | !set_isempty(ec->syscall_filter) || | |
3148 | !set_isempty(ec->syscall_archs) || | |
3149 | ec->address_families_whitelist || | |
3150 | !set_isempty(ec->address_families))) | |
3151 | ec->no_new_privileges = true; | |
e06c73cc | 3152 | |
598459ce LP |
3153 | if (ec->private_devices) |
3154 | ec->capability_bounding_set_drop |= (uint64_t) 1ULL << (uint64_t) CAP_MKNOD; | |
cba6e062 LP |
3155 | } |
3156 | ||
598459ce LP |
3157 | cc = unit_get_cgroup_context(u); |
3158 | if (cc) { | |
f513e420 | 3159 | |
598459ce LP |
3160 | if (ec && |
3161 | ec->private_devices && | |
3162 | cc->device_policy == CGROUP_AUTO) | |
3163 | cc->device_policy = CGROUP_CLOSED; | |
3164 | } | |
f1660f96 | 3165 | |
cba6e062 | 3166 | return 0; |
e06c73cc LP |
3167 | } |
3168 | ||
3ef63c31 LP |
3169 | ExecContext *unit_get_exec_context(Unit *u) { |
3170 | size_t offset; | |
3171 | assert(u); | |
3172 | ||
598459ce LP |
3173 | if (u->type < 0) |
3174 | return NULL; | |
3175 | ||
3ef63c31 LP |
3176 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3177 | if (offset <= 0) | |
3178 | return NULL; | |
3179 | ||
3180 | return (ExecContext*) ((uint8_t*) u + offset); | |
3181 | } | |
3182 | ||
718db961 LP |
3183 | KillContext *unit_get_kill_context(Unit *u) { |
3184 | size_t offset; | |
3185 | assert(u); | |
3186 | ||
598459ce LP |
3187 | if (u->type < 0) |
3188 | return NULL; | |
3189 | ||
718db961 LP |
3190 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3191 | if (offset <= 0) | |
3192 | return NULL; | |
3193 | ||
3194 | return (KillContext*) ((uint8_t*) u + offset); | |
3195 | } | |
3196 | ||
4ad49000 LP |
3197 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3198 | size_t offset; | |
3199 | ||
598459ce LP |
3200 | if (u->type < 0) |
3201 | return NULL; | |
3202 | ||
4ad49000 LP |
3203 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3204 | if (offset <= 0) | |
3205 | return NULL; | |
3206 | ||
3207 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3208 | } | |
3209 | ||
613b411c LP |
3210 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3211 | size_t offset; | |
3212 | ||
598459ce LP |
3213 | if (u->type < 0) |
3214 | return NULL; | |
3215 | ||
613b411c LP |
3216 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3217 | if (offset <= 0) | |
3218 | return NULL; | |
3219 | ||
3220 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3221 | } | |
3222 | ||
29686440 | 3223 | static int unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode, bool transient, char **dir) { |
26d04f86 | 3224 | if (u->manager->running_as == SYSTEMD_USER) { |
29686440 | 3225 | int r; |
26d04f86 | 3226 | |
718880ba SA |
3227 | if (mode == UNIT_PERSISTENT && !transient) |
3228 | r = user_config_home(dir); | |
3229 | else | |
4d5dec23 | 3230 | r = user_runtime_dir(dir); |
718880ba | 3231 | |
26d04f86 LP |
3232 | if (r == 0) |
3233 | return -ENOENT; | |
29686440 ZJS |
3234 | return r; |
3235 | } | |
26d04f86 | 3236 | |
29686440 ZJS |
3237 | if (mode == UNIT_PERSISTENT && !transient) |
3238 | *dir = strdup("/etc/systemd/system"); | |
8e2af478 | 3239 | else |
29686440 ZJS |
3240 | *dir = strdup("/run/systemd/system"); |
3241 | if (!*dir) | |
71645aca LP |
3242 | return -ENOMEM; |
3243 | ||
26d04f86 | 3244 | return 0; |
71645aca LP |
3245 | } |
3246 | ||
29686440 ZJS |
3247 | static int unit_drop_in_file(Unit *u, |
3248 | UnitSetPropertiesMode mode, const char *name, char **p, char **q) { | |
3249 | _cleanup_free_ char *dir = NULL; | |
3250 | int r; | |
3251 | ||
3252 | assert(u); | |
3253 | ||
3254 | r = unit_drop_in_dir(u, mode, u->transient, &dir); | |
3255 | if (r < 0) | |
3256 | return r; | |
3257 | ||
8eea8687 | 3258 | return drop_in_file(dir, u->id, 50, name, p, q); |
29686440 ZJS |
3259 | } |
3260 | ||
8e2af478 | 3261 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
29686440 ZJS |
3262 | |
3263 | _cleanup_free_ char *dir = NULL; | |
26d04f86 | 3264 | int r; |
71645aca LP |
3265 | |
3266 | assert(u); | |
3267 | ||
6d235724 | 3268 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3269 | return 0; |
3270 | ||
29686440 | 3271 | r = unit_drop_in_dir(u, mode, u->transient, &dir); |
26d04f86 LP |
3272 | if (r < 0) |
3273 | return r; | |
71645aca | 3274 | |
8eea8687 | 3275 | return write_drop_in(dir, u->id, 50, name, data); |
26d04f86 | 3276 | } |
71645aca | 3277 | |
b9ec9359 LP |
3278 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3279 | _cleanup_free_ char *p = NULL; | |
3280 | va_list ap; | |
3281 | int r; | |
3282 | ||
3283 | assert(u); | |
3284 | assert(name); | |
3285 | assert(format); | |
3286 | ||
6d235724 | 3287 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3288 | return 0; |
3289 | ||
3290 | va_start(ap, format); | |
3291 | r = vasprintf(&p, format, ap); | |
3292 | va_end(ap); | |
3293 | ||
3294 | if (r < 0) | |
3295 | return -ENOMEM; | |
3296 | ||
3297 | return unit_write_drop_in(u, mode, name, p); | |
3298 | } | |
3299 | ||
3300 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
b42defe3 LP |
3301 | _cleanup_free_ char *ndata = NULL; |
3302 | ||
3303 | assert(u); | |
3304 | assert(name); | |
3305 | assert(data); | |
3306 | ||
3307 | if (!UNIT_VTABLE(u)->private_section) | |
3308 | return -EINVAL; | |
3309 | ||
6d235724 | 3310 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3311 | return 0; |
3312 | ||
b42defe3 LP |
3313 | ndata = strjoin("[", UNIT_VTABLE(u)->private_section, "]\n", data, NULL); |
3314 | if (!ndata) | |
3315 | return -ENOMEM; | |
3316 | ||
3317 | return unit_write_drop_in(u, mode, name, ndata); | |
3318 | } | |
3319 | ||
b9ec9359 LP |
3320 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3321 | _cleanup_free_ char *p = NULL; | |
3322 | va_list ap; | |
3323 | int r; | |
3324 | ||
3325 | assert(u); | |
3326 | assert(name); | |
3327 | assert(format); | |
3328 | ||
6d235724 | 3329 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3330 | return 0; |
3331 | ||
3332 | va_start(ap, format); | |
3333 | r = vasprintf(&p, format, ap); | |
3334 | va_end(ap); | |
3335 | ||
3336 | if (r < 0) | |
3337 | return -ENOMEM; | |
3338 | ||
3339 | return unit_write_drop_in_private(u, mode, name, p); | |
3340 | } | |
3341 | ||
8e2af478 | 3342 | int unit_remove_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name) { |
26d04f86 LP |
3343 | _cleanup_free_ char *p = NULL, *q = NULL; |
3344 | int r; | |
71645aca | 3345 | |
26d04f86 | 3346 | assert(u); |
71645aca | 3347 | |
6d235724 | 3348 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3349 | return 0; |
3350 | ||
29686440 | 3351 | r = unit_drop_in_file(u, mode, name, &p, &q); |
6891529f ZJS |
3352 | if (r < 0) |
3353 | return r; | |
3354 | ||
71645aca | 3355 | if (unlink(q) < 0) |
241da328 | 3356 | r = errno == ENOENT ? 0 : -errno; |
26d04f86 | 3357 | else |
241da328 | 3358 | r = 1; |
71645aca LP |
3359 | |
3360 | rmdir(p); | |
26d04f86 | 3361 | return r; |
71645aca LP |
3362 | } |
3363 | ||
c2756a68 LP |
3364 | int unit_make_transient(Unit *u) { |
3365 | int r; | |
3366 | ||
3367 | assert(u); | |
3368 | ||
3369 | u->load_state = UNIT_STUB; | |
3370 | u->load_error = 0; | |
3371 | u->transient = true; | |
3372 | ||
3373 | free(u->fragment_path); | |
3374 | u->fragment_path = NULL; | |
3375 | ||
3376 | if (u->manager->running_as == SYSTEMD_USER) { | |
3377 | _cleanup_free_ char *c = NULL; | |
3378 | ||
4d5dec23 | 3379 | r = user_runtime_dir(&c); |
c2756a68 LP |
3380 | if (r < 0) |
3381 | return r; | |
3382 | if (r == 0) | |
3383 | return -ENOENT; | |
3384 | ||
3385 | u->fragment_path = strjoin(c, "/", u->id, NULL); | |
3386 | if (!u->fragment_path) | |
3387 | return -ENOMEM; | |
3388 | ||
3389 | mkdir_p(c, 0755); | |
3390 | } else { | |
3391 | u->fragment_path = strappend("/run/systemd/system/", u->id); | |
3392 | if (!u->fragment_path) | |
3393 | return -ENOMEM; | |
3394 | ||
3395 | mkdir_p("/run/systemd/system", 0755); | |
3396 | } | |
3397 | ||
3398 | return write_string_file_atomic_label(u->fragment_path, "# Transient stub"); | |
3399 | } | |
3400 | ||
cd2086fe LP |
3401 | int unit_kill_context( |
3402 | Unit *u, | |
3403 | KillContext *c, | |
db2cb23b | 3404 | KillOperation k, |
cd2086fe LP |
3405 | pid_t main_pid, |
3406 | pid_t control_pid, | |
3407 | bool main_pid_alien) { | |
3408 | ||
bc6aed7b | 3409 | int sig, wait_for_exit = false, r; |
cd2086fe LP |
3410 | |
3411 | assert(u); | |
3412 | assert(c); | |
3413 | ||
3414 | if (c->kill_mode == KILL_NONE) | |
3415 | return 0; | |
3416 | ||
db2cb23b UTL |
3417 | switch (k) { |
3418 | case KILL_KILL: | |
3419 | sig = SIGKILL; | |
3420 | break; | |
3421 | case KILL_ABORT: | |
3422 | sig = SIGABRT; | |
3423 | break; | |
3424 | case KILL_TERMINATE: | |
3425 | sig = c->kill_signal; | |
3426 | break; | |
3427 | default: | |
3428 | assert_not_reached("KillOperation unknown"); | |
3429 | } | |
cd2086fe LP |
3430 | |
3431 | if (main_pid > 0) { | |
3432 | r = kill_and_sigcont(main_pid, sig); | |
3433 | ||
3434 | if (r < 0 && r != -ESRCH) { | |
3435 | _cleanup_free_ char *comm = NULL; | |
3436 | get_process_comm(main_pid, &comm); | |
3437 | ||
31938a85 | 3438 | log_unit_warning_errno(u->id, r, "Failed to kill main process " PID_FMT " (%s): %m", main_pid, strna(comm)); |
82659fd7 | 3439 | } else { |
bc6aed7b LP |
3440 | if (!main_pid_alien) |
3441 | wait_for_exit = true; | |
82659fd7 | 3442 | |
db2cb23b | 3443 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3444 | kill(main_pid, SIGHUP); |
3445 | } | |
cd2086fe LP |
3446 | } |
3447 | ||
3448 | if (control_pid > 0) { | |
3449 | r = kill_and_sigcont(control_pid, sig); | |
3450 | ||
3451 | if (r < 0 && r != -ESRCH) { | |
3452 | _cleanup_free_ char *comm = NULL; | |
3453 | get_process_comm(control_pid, &comm); | |
3454 | ||
31938a85 | 3455 | log_unit_warning_errno(u->id, r, "Failed to kill control process " PID_FMT " (%s): %m", control_pid, strna(comm)); |
82659fd7 | 3456 | } else { |
cd2086fe | 3457 | wait_for_exit = true; |
82659fd7 | 3458 | |
db2cb23b | 3459 | if (c->send_sighup && k != KILL_KILL) |
82659fd7 LP |
3460 | kill(control_pid, SIGHUP); |
3461 | } | |
cd2086fe LP |
3462 | } |
3463 | ||
db2cb23b | 3464 | if ((c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL)) && u->cgroup_path) { |
cd2086fe LP |
3465 | _cleanup_set_free_ Set *pid_set = NULL; |
3466 | ||
82659fd7 LP |
3467 | /* Exclude the main/control pids from being killed via the cgroup */ |
3468 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3469 | if (!pid_set) |
3470 | return -ENOMEM; | |
3471 | ||
4ad49000 | 3472 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, sig, true, true, false, pid_set); |
cd2086fe LP |
3473 | if (r < 0) { |
3474 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
31938a85 | 3475 | log_unit_warning_errno(u->id, r, "Failed to kill control group: %m"); |
82659fd7 | 3476 | } else if (r > 0) { |
bc6aed7b | 3477 | |
743970d2 LP |
3478 | /* FIXME: For now, we will not wait for the |
3479 | * cgroup members to die, simply because | |
3480 | * cgroup notification is unreliable. It | |
3481 | * doesn't work at all in containers, and | |
3482 | * outside of containers it can be confused | |
3483 | * easily by leaving directories in the | |
3484 | * cgroup. */ | |
3485 | ||
3486 | /* wait_for_exit = true; */ | |
58ea275a | 3487 | |
db2cb23b | 3488 | if (c->send_sighup && k != KILL_KILL) { |
82659fd7 LP |
3489 | set_free(pid_set); |
3490 | ||
3491 | pid_set = unit_pid_set(main_pid, control_pid); | |
3492 | if (!pid_set) | |
3493 | return -ENOMEM; | |
3494 | ||
8190da36 | 3495 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, SIGHUP, false, true, false, pid_set); |
82659fd7 LP |
3496 | } |
3497 | } | |
cd2086fe LP |
3498 | } |
3499 | ||
3500 | return wait_for_exit; | |
3501 | } | |
3502 | ||
a57f7e2c LP |
3503 | int unit_require_mounts_for(Unit *u, const char *path) { |
3504 | char prefix[strlen(path) + 1], *p; | |
3505 | int r; | |
3506 | ||
3507 | assert(u); | |
3508 | assert(path); | |
3509 | ||
3510 | /* Registers a unit for requiring a certain path and all its | |
3511 | * prefixes. We keep a simple array of these paths in the | |
3512 | * unit, since its usually short. However, we build a prefix | |
3513 | * table for all possible prefixes so that new appearing mount | |
3514 | * units can easily determine which units to make themselves a | |
3515 | * dependency of. */ | |
3516 | ||
70b64bd3 ZJS |
3517 | if (!path_is_absolute(path)) |
3518 | return -EINVAL; | |
3519 | ||
a57f7e2c LP |
3520 | p = strdup(path); |
3521 | if (!p) | |
3522 | return -ENOMEM; | |
3523 | ||
3524 | path_kill_slashes(p); | |
3525 | ||
a57f7e2c LP |
3526 | if (!path_is_safe(p)) { |
3527 | free(p); | |
3528 | return -EPERM; | |
3529 | } | |
3530 | ||
3531 | if (strv_contains(u->requires_mounts_for, p)) { | |
3532 | free(p); | |
3533 | return 0; | |
3534 | } | |
3535 | ||
6e18964d ZJS |
3536 | r = strv_consume(&u->requires_mounts_for, p); |
3537 | if (r < 0) | |
a57f7e2c | 3538 | return r; |
a57f7e2c LP |
3539 | |
3540 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3541 | Set *x; | |
3542 | ||
3543 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3544 | if (!x) { | |
3545 | char *q; | |
3546 | ||
3547 | if (!u->manager->units_requiring_mounts_for) { | |
d5099efc | 3548 | u->manager->units_requiring_mounts_for = hashmap_new(&string_hash_ops); |
a57f7e2c LP |
3549 | if (!u->manager->units_requiring_mounts_for) |
3550 | return -ENOMEM; | |
3551 | } | |
3552 | ||
3553 | q = strdup(prefix); | |
3554 | if (!q) | |
3555 | return -ENOMEM; | |
3556 | ||
d5099efc | 3557 | x = set_new(NULL); |
a57f7e2c LP |
3558 | if (!x) { |
3559 | free(q); | |
3560 | return -ENOMEM; | |
3561 | } | |
3562 | ||
3563 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3564 | if (r < 0) { | |
3565 | free(q); | |
3566 | set_free(x); | |
3567 | return r; | |
3568 | } | |
3569 | } | |
3570 | ||
3571 | r = set_put(x, u); | |
3572 | if (r < 0) | |
3573 | return r; | |
3574 | } | |
3575 | ||
3576 | return 0; | |
3577 | } | |
3578 | ||
613b411c LP |
3579 | int unit_setup_exec_runtime(Unit *u) { |
3580 | ExecRuntime **rt; | |
3581 | size_t offset; | |
3582 | Iterator i; | |
3583 | Unit *other; | |
3584 | ||
3585 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3586 | assert(offset > 0); | |
3587 | ||
06b643e7 | 3588 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3589 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3590 | if (*rt) | |
3591 | return 0; | |
3592 | ||
3593 | /* Try to get it from somebody else */ | |
3594 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3595 | ||
3596 | *rt = unit_get_exec_runtime(other); | |
3597 | if (*rt) { | |
3598 | exec_runtime_ref(*rt); | |
3599 | return 0; | |
3600 | } | |
3601 | } | |
3602 | ||
3603 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3604 | } | |
3605 | ||
94f04347 LP |
3606 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { |
3607 | [UNIT_ACTIVE] = "active", | |
032ff4af | 3608 | [UNIT_RELOADING] = "reloading", |
94f04347 | 3609 | [UNIT_INACTIVE] = "inactive", |
fdf20a31 | 3610 | [UNIT_FAILED] = "failed", |
94f04347 LP |
3611 | [UNIT_ACTIVATING] = "activating", |
3612 | [UNIT_DEACTIVATING] = "deactivating" | |
3613 | }; | |
3614 | ||
3615 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); |