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Commit | Line | Data |
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a7334b09 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
a7334b09 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
87f0e418 | 20 | #include <errno.h> |
0301abf4 | 21 | #include <stdlib.h> |
4f5dd394 | 22 | #include <string.h> |
45fb0699 | 23 | #include <sys/stat.h> |
4f5dd394 | 24 | #include <unistd.h> |
87f0e418 | 25 | |
718db961 LP |
26 | #include "sd-id128.h" |
27 | #include "sd-messages.h" | |
4f5dd394 | 28 | |
b5efdb8a | 29 | #include "alloc-util.h" |
4f5dd394 LP |
30 | #include "bus-common-errors.h" |
31 | #include "bus-util.h" | |
c6c18be3 | 32 | #include "cgroup-util.h" |
4f5dd394 LP |
33 | #include "dbus-unit.h" |
34 | #include "dbus.h" | |
35 | #include "dropin.h" | |
36 | #include "escape.h" | |
37 | #include "execute.h" | |
a5c32cff | 38 | #include "fileio-label.h" |
6482f626 | 39 | #include "formats-util.h" |
4f5dd394 LP |
40 | #include "load-dropin.h" |
41 | #include "load-fragment.h" | |
42 | #include "log.h" | |
43 | #include "macro.h" | |
44 | #include "missing.h" | |
45 | #include "mkdir.h" | |
6bedfcbb | 46 | #include "parse-util.h" |
4f5dd394 | 47 | #include "path-util.h" |
0b452006 | 48 | #include "process-util.h" |
4f5dd394 | 49 | #include "set.h" |
6eb7c172 | 50 | #include "signal-util.h" |
e9db43d5 | 51 | #include "special.h" |
8fcde012 | 52 | #include "stat-util.h" |
d054f0a4 | 53 | #include "stdio-util.h" |
07630cea | 54 | #include "string-util.h" |
4f5dd394 | 55 | #include "strv.h" |
4f4afc88 | 56 | #include "umask-util.h" |
4f5dd394 | 57 | #include "unit-name.h" |
e9db43d5 | 58 | #include "unit.h" |
b1d4f8e1 LP |
59 | #include "user-util.h" |
60 | #include "virt.h" | |
87f0e418 LP |
61 | |
62 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
63 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 | 64 | [UNIT_SOCKET] = &socket_vtable, |
e821075a | 65 | [UNIT_BUSNAME] = &busname_vtable, |
87f0e418 LP |
66 | [UNIT_TARGET] = &target_vtable, |
67 | [UNIT_DEVICE] = &device_vtable, | |
68 | [UNIT_MOUNT] = &mount_vtable, | |
69 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 70 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 71 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 72 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
73 | [UNIT_SLICE] = &slice_vtable, |
74 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
75 | }; |
76 | ||
f2341e0a | 77 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 78 | |
7d17cfbc | 79 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
80 | Unit *u; |
81 | ||
82 | assert(m); | |
ac155bb8 | 83 | assert(size >= sizeof(Unit)); |
87f0e418 | 84 | |
7d17cfbc MS |
85 | u = malloc0(size); |
86 | if (!u) | |
87f0e418 LP |
87 | return NULL; |
88 | ||
d5099efc | 89 | u->names = set_new(&string_hash_ops); |
ac155bb8 | 90 | if (!u->names) { |
87f0e418 LP |
91 | free(u); |
92 | return NULL; | |
93 | } | |
94 | ||
ac155bb8 MS |
95 | u->manager = m; |
96 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
97 | u->default_dependencies = true; |
98 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 99 | u->unit_file_preset = -1; |
d420282b | 100 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 101 | u->cgroup_inotify_wd = -1; |
36c16a7c | 102 | u->job_timeout = USEC_INFINITY; |
00d9ef85 LP |
103 | u->ref_uid = UID_INVALID; |
104 | u->ref_gid = GID_INVALID; | |
87f0e418 | 105 | |
6bf0f408 | 106 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 107 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 108 | |
87f0e418 LP |
109 | return u; |
110 | } | |
111 | ||
f278026d LP |
112 | bool unit_has_name(Unit *u, const char *name) { |
113 | assert(u); | |
114 | assert(name); | |
115 | ||
ac155bb8 | 116 | return !!set_get(u->names, (char*) name); |
f278026d LP |
117 | } |
118 | ||
598459ce LP |
119 | static void unit_init(Unit *u) { |
120 | CGroupContext *cc; | |
121 | ExecContext *ec; | |
122 | KillContext *kc; | |
123 | ||
124 | assert(u); | |
125 | assert(u->manager); | |
126 | assert(u->type >= 0); | |
127 | ||
128 | cc = unit_get_cgroup_context(u); | |
129 | if (cc) { | |
130 | cgroup_context_init(cc); | |
131 | ||
132 | /* Copy in the manager defaults into the cgroup | |
133 | * context, _before_ the rest of the settings have | |
134 | * been initialized */ | |
135 | ||
136 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 137 | cc->io_accounting = u->manager->default_io_accounting; |
598459ce LP |
138 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
139 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 140 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
0af20ea2 LP |
141 | |
142 | if (u->type != UNIT_SLICE) | |
143 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
144 | } |
145 | ||
146 | ec = unit_get_exec_context(u); | |
147 | if (ec) | |
148 | exec_context_init(ec); | |
149 | ||
150 | kc = unit_get_kill_context(u); | |
151 | if (kc) | |
152 | kill_context_init(kc); | |
153 | ||
154 | if (UNIT_VTABLE(u)->init) | |
155 | UNIT_VTABLE(u)->init(u); | |
156 | } | |
157 | ||
87f0e418 | 158 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 159 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 160 | UnitType t; |
87f0e418 LP |
161 | int r; |
162 | ||
163 | assert(u); | |
164 | assert(text); | |
165 | ||
7410616c | 166 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 167 | |
ac155bb8 | 168 | if (!u->instance) |
9e2f7c11 | 169 | return -EINVAL; |
87f0e418 | 170 | |
7410616c LP |
171 | r = unit_name_replace_instance(text, u->instance, &s); |
172 | if (r < 0) | |
173 | return r; | |
174 | } else { | |
9e2f7c11 | 175 | s = strdup(text); |
7410616c LP |
176 | if (!s) |
177 | return -ENOMEM; | |
178 | } | |
87f0e418 | 179 | |
7410616c LP |
180 | if (set_contains(u->names, s)) |
181 | return 0; | |
182 | if (hashmap_contains(u->manager->units, s)) | |
183 | return -EEXIST; | |
184 | ||
185 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 186 | return -EINVAL; |
e537352b | 187 | |
7410616c LP |
188 | t = unit_name_to_type(s); |
189 | if (t < 0) | |
190 | return -EINVAL; | |
87f0e418 | 191 | |
598459ce LP |
192 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
193 | return -EINVAL; | |
87f0e418 | 194 | |
e48614c4 ZJS |
195 | r = unit_name_to_instance(s, &i); |
196 | if (r < 0) | |
598459ce | 197 | return r; |
87f0e418 | 198 | |
ce99c68a | 199 | if (i && !unit_type_may_template(t)) |
598459ce | 200 | return -EINVAL; |
9e2f7c11 | 201 | |
276c3e78 | 202 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
203 | * but not both. Note that we do allow names with different |
204 | * instance names however! */ | |
598459ce LP |
205 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
206 | return -EINVAL; | |
9e2f7c11 | 207 | |
8a993b61 | 208 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 209 | return -EEXIST; |
9e2f7c11 | 210 | |
598459ce LP |
211 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
212 | return -E2BIG; | |
4f0f902f | 213 | |
e48614c4 | 214 | r = set_put(u->names, s); |
7410616c | 215 | if (r < 0) |
598459ce | 216 | return r; |
7410616c | 217 | assert(r > 0); |
87f0e418 | 218 | |
e48614c4 ZJS |
219 | r = hashmap_put(u->manager->units, s, u); |
220 | if (r < 0) { | |
7410616c | 221 | (void) set_remove(u->names, s); |
598459ce | 222 | return r; |
87f0e418 LP |
223 | } |
224 | ||
ac155bb8 | 225 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
226 | u->type = t; |
227 | u->id = s; | |
228 | u->instance = i; | |
9e2f7c11 | 229 | |
71fda00f | 230 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 231 | |
598459ce | 232 | unit_init(u); |
87f0e418 | 233 | |
598459ce LP |
234 | i = NULL; |
235 | } | |
9e2f7c11 | 236 | |
598459ce | 237 | s = NULL; |
9e2f7c11 | 238 | |
598459ce LP |
239 | unit_add_to_dbus_queue(u); |
240 | return 0; | |
87f0e418 LP |
241 | } |
242 | ||
0ae97ec1 | 243 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 244 | _cleanup_free_ char *t = NULL; |
598459ce | 245 | char *s, *i; |
276c3e78 | 246 | int r; |
0ae97ec1 LP |
247 | |
248 | assert(u); | |
249 | assert(name); | |
250 | ||
7410616c | 251 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 252 | |
ac155bb8 | 253 | if (!u->instance) |
9e2f7c11 LP |
254 | return -EINVAL; |
255 | ||
7410616c LP |
256 | r = unit_name_replace_instance(name, u->instance, &t); |
257 | if (r < 0) | |
258 | return r; | |
9e2f7c11 LP |
259 | |
260 | name = t; | |
261 | } | |
262 | ||
0ae97ec1 | 263 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 264 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 265 | if (!s) |
0ae97ec1 LP |
266 | return -ENOENT; |
267 | ||
7410616c | 268 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
269 | r = unit_name_to_instance(s, &i); |
270 | if (r < 0) | |
276c3e78 LP |
271 | return r; |
272 | ||
ac155bb8 | 273 | u->id = s; |
276c3e78 | 274 | |
ac155bb8 MS |
275 | free(u->instance); |
276 | u->instance = i; | |
276c3e78 | 277 | |
c1e1601e | 278 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 279 | |
0ae97ec1 LP |
280 | return 0; |
281 | } | |
282 | ||
f50e0a01 LP |
283 | int unit_set_description(Unit *u, const char *description) { |
284 | char *s; | |
285 | ||
286 | assert(u); | |
287 | ||
8aec412f LP |
288 | if (isempty(description)) |
289 | s = NULL; | |
290 | else { | |
291 | s = strdup(description); | |
292 | if (!s) | |
293 | return -ENOMEM; | |
294 | } | |
f50e0a01 | 295 | |
ac155bb8 MS |
296 | free(u->description); |
297 | u->description = s; | |
c1e1601e LP |
298 | |
299 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
300 | return 0; |
301 | } | |
302 | ||
701cc384 | 303 | bool unit_check_gc(Unit *u) { |
a354329f | 304 | UnitActiveState state; |
701cc384 LP |
305 | assert(u); |
306 | ||
a354329f | 307 | if (u->job) |
701cc384 LP |
308 | return true; |
309 | ||
a354329f | 310 | if (u->nop_job) |
6c073082 LP |
311 | return true; |
312 | ||
a354329f LP |
313 | state = unit_active_state(u); |
314 | ||
315 | /* If the unit is inactive and failed and no job is queued for | |
316 | * it, then release its runtime resources */ | |
317 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
318 | UNIT_VTABLE(u)->release_resources) | |
319 | UNIT_VTABLE(u)->release_resources(u); | |
320 | ||
321 | /* But we keep the unit object around for longer when it is | |
322 | * referenced or configured to not be gc'ed */ | |
323 | if (state != UNIT_INACTIVE) | |
701cc384 LP |
324 | return true; |
325 | ||
a354329f | 326 | if (u->no_gc) |
701cc384 LP |
327 | return true; |
328 | ||
9d576438 LP |
329 | if (u->refs) |
330 | return true; | |
331 | ||
701cc384 LP |
332 | if (UNIT_VTABLE(u)->check_gc) |
333 | if (UNIT_VTABLE(u)->check_gc(u)) | |
334 | return true; | |
335 | ||
336 | return false; | |
337 | } | |
338 | ||
87f0e418 LP |
339 | void unit_add_to_load_queue(Unit *u) { |
340 | assert(u); | |
ac155bb8 | 341 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 342 | |
ac155bb8 | 343 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
344 | return; |
345 | ||
71fda00f | 346 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 347 | u->in_load_queue = true; |
87f0e418 LP |
348 | } |
349 | ||
23a177ef LP |
350 | void unit_add_to_cleanup_queue(Unit *u) { |
351 | assert(u); | |
352 | ||
ac155bb8 | 353 | if (u->in_cleanup_queue) |
23a177ef LP |
354 | return; |
355 | ||
71fda00f | 356 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 357 | u->in_cleanup_queue = true; |
23a177ef LP |
358 | } |
359 | ||
701cc384 LP |
360 | void unit_add_to_gc_queue(Unit *u) { |
361 | assert(u); | |
362 | ||
ac155bb8 | 363 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
364 | return; |
365 | ||
366 | if (unit_check_gc(u)) | |
367 | return; | |
368 | ||
71fda00f | 369 | LIST_PREPEND(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 370 | u->in_gc_queue = true; |
701cc384 | 371 | |
313cefa1 | 372 | u->manager->n_in_gc_queue++; |
701cc384 LP |
373 | } |
374 | ||
c1e1601e LP |
375 | void unit_add_to_dbus_queue(Unit *u) { |
376 | assert(u); | |
ac155bb8 | 377 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 378 | |
ac155bb8 | 379 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
380 | return; |
381 | ||
a567261a | 382 | /* Shortcut things if nobody cares */ |
8f8f05a9 LP |
383 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
384 | set_isempty(u->manager->private_buses)) { | |
ac155bb8 | 385 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
386 | return; |
387 | } | |
388 | ||
71fda00f | 389 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 390 | u->in_dbus_queue = true; |
c1e1601e LP |
391 | } |
392 | ||
87f0e418 LP |
393 | static void bidi_set_free(Unit *u, Set *s) { |
394 | Iterator i; | |
395 | Unit *other; | |
396 | ||
397 | assert(u); | |
398 | ||
399 | /* Frees the set and makes sure we are dropped from the | |
400 | * inverse pointers */ | |
401 | ||
402 | SET_FOREACH(other, s, i) { | |
403 | UnitDependency d; | |
404 | ||
405 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 406 | set_remove(other->dependencies[d], u); |
701cc384 LP |
407 | |
408 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
409 | } |
410 | ||
411 | set_free(s); | |
412 | } | |
413 | ||
c2756a68 LP |
414 | static void unit_remove_transient(Unit *u) { |
415 | char **i; | |
416 | ||
417 | assert(u); | |
418 | ||
419 | if (!u->transient) | |
420 | return; | |
421 | ||
422 | if (u->fragment_path) | |
3f5e8115 | 423 | (void) unlink(u->fragment_path); |
c2756a68 LP |
424 | |
425 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 426 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 427 | |
39591351 LP |
428 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
429 | if (!p) | |
430 | continue; | |
431 | ||
432 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
433 | if (!pp) | |
434 | continue; | |
435 | ||
436 | /* Only drop transient drop-ins */ | |
437 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
438 | continue; | |
c2756a68 | 439 | |
39591351 LP |
440 | (void) unlink(*i); |
441 | (void) rmdir(p); | |
c2756a68 LP |
442 | } |
443 | } | |
444 | ||
a57f7e2c LP |
445 | static void unit_free_requires_mounts_for(Unit *u) { |
446 | char **j; | |
447 | ||
448 | STRV_FOREACH(j, u->requires_mounts_for) { | |
449 | char s[strlen(*j) + 1]; | |
450 | ||
451 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
452 | char *y; | |
453 | Set *x; | |
454 | ||
455 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
456 | if (!x) | |
457 | continue; | |
458 | ||
459 | set_remove(x, u); | |
460 | ||
461 | if (set_isempty(x)) { | |
462 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
463 | free(y); | |
464 | set_free(x); | |
465 | } | |
466 | } | |
467 | } | |
468 | ||
6796073e | 469 | u->requires_mounts_for = strv_free(u->requires_mounts_for); |
a57f7e2c LP |
470 | } |
471 | ||
598459ce LP |
472 | static void unit_done(Unit *u) { |
473 | ExecContext *ec; | |
474 | CGroupContext *cc; | |
475 | ||
476 | assert(u); | |
477 | ||
478 | if (u->type < 0) | |
479 | return; | |
480 | ||
481 | if (UNIT_VTABLE(u)->done) | |
482 | UNIT_VTABLE(u)->done(u); | |
483 | ||
484 | ec = unit_get_exec_context(u); | |
485 | if (ec) | |
486 | exec_context_done(ec); | |
487 | ||
488 | cc = unit_get_cgroup_context(u); | |
489 | if (cc) | |
490 | cgroup_context_done(cc); | |
491 | } | |
492 | ||
87f0e418 LP |
493 | void unit_free(Unit *u) { |
494 | UnitDependency d; | |
495 | Iterator i; | |
496 | char *t; | |
497 | ||
498 | assert(u); | |
499 | ||
4f4afc88 LP |
500 | if (u->transient_file) |
501 | fclose(u->transient_file); | |
502 | ||
2c289ea8 | 503 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
504 | unit_remove_transient(u); |
505 | ||
c1e1601e LP |
506 | bus_unit_send_removed_signal(u); |
507 | ||
598459ce | 508 | unit_done(u); |
a013b84b | 509 | |
cf9fd508 DM |
510 | sd_bus_slot_unref(u->match_bus_slot); |
511 | ||
a57f7e2c LP |
512 | unit_free_requires_mounts_for(u); |
513 | ||
ac155bb8 MS |
514 | SET_FOREACH(t, u->names, i) |
515 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 516 | |
97e7d748 MS |
517 | if (u->job) { |
518 | Job *j = u->job; | |
519 | job_uninstall(j); | |
520 | job_free(j); | |
521 | } | |
964e0949 | 522 | |
e0209d83 MS |
523 | if (u->nop_job) { |
524 | Job *j = u->nop_job; | |
525 | job_uninstall(j); | |
526 | job_free(j); | |
527 | } | |
528 | ||
964e0949 | 529 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 530 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 531 | |
ac155bb8 | 532 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 533 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 534 | |
ac155bb8 | 535 | if (u->in_load_queue) |
71fda00f | 536 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 537 | |
ac155bb8 | 538 | if (u->in_dbus_queue) |
71fda00f | 539 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 540 | |
ac155bb8 | 541 | if (u->in_cleanup_queue) |
71fda00f | 542 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 543 | |
ac155bb8 | 544 | if (u->in_gc_queue) { |
71fda00f | 545 | LIST_REMOVE(gc_queue, u->manager->gc_queue, u); |
ac155bb8 | 546 | u->manager->n_in_gc_queue--; |
701cc384 LP |
547 | } |
548 | ||
4ad49000 | 549 | if (u->in_cgroup_queue) |
71fda00f | 550 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 551 | |
efdb0237 | 552 | unit_release_cgroup(u); |
72673e86 | 553 | |
00d9ef85 LP |
554 | unit_unref_uid_gid(u, false); |
555 | ||
5269eb6b | 556 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 557 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 558 | |
ac155bb8 | 559 | free(u->description); |
49dbfa7b | 560 | strv_free(u->documentation); |
ac155bb8 | 561 | free(u->fragment_path); |
1b64d026 | 562 | free(u->source_path); |
ae7a7182 | 563 | strv_free(u->dropin_paths); |
ac155bb8 | 564 | free(u->instance); |
87f0e418 | 565 | |
f189ab18 LP |
566 | free(u->job_timeout_reboot_arg); |
567 | ||
ac155bb8 | 568 | set_free_free(u->names); |
87f0e418 | 569 | |
a911bb9a LP |
570 | unit_unwatch_all_pids(u); |
571 | ||
ac155bb8 | 572 | condition_free_list(u->conditions); |
59fccdc5 | 573 | condition_free_list(u->asserts); |
52661efd | 574 | |
6bf0f408 LP |
575 | free(u->reboot_arg); |
576 | ||
702a2d8f LP |
577 | unit_ref_unset(&u->slice); |
578 | ||
ac155bb8 MS |
579 | while (u->refs) |
580 | unit_ref_unset(u->refs); | |
57020a3a | 581 | |
87f0e418 LP |
582 | free(u); |
583 | } | |
584 | ||
585 | UnitActiveState unit_active_state(Unit *u) { | |
586 | assert(u); | |
587 | ||
ac155bb8 | 588 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
589 | return unit_active_state(unit_follow_merge(u)); |
590 | ||
591 | /* After a reload it might happen that a unit is not correctly | |
592 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 593 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
594 | |
595 | return UNIT_VTABLE(u)->active_state(u); | |
596 | } | |
597 | ||
10a94420 LP |
598 | const char* unit_sub_state_to_string(Unit *u) { |
599 | assert(u); | |
600 | ||
601 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
602 | } | |
603 | ||
7c0b05e5 MS |
604 | static int complete_move(Set **s, Set **other) { |
605 | int r; | |
606 | ||
23a177ef LP |
607 | assert(s); |
608 | assert(other); | |
87f0e418 | 609 | |
23a177ef | 610 | if (!*other) |
7c0b05e5 | 611 | return 0; |
87f0e418 | 612 | |
7c0b05e5 MS |
613 | if (*s) { |
614 | r = set_move(*s, *other); | |
615 | if (r < 0) | |
616 | return r; | |
617 | } else { | |
23a177ef LP |
618 | *s = *other; |
619 | *other = NULL; | |
620 | } | |
7c0b05e5 MS |
621 | |
622 | return 0; | |
23a177ef | 623 | } |
87f0e418 | 624 | |
7c0b05e5 | 625 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
626 | char *t; |
627 | Iterator i; | |
7c0b05e5 | 628 | int r; |
87f0e418 | 629 | |
23a177ef LP |
630 | assert(u); |
631 | assert(other); | |
632 | ||
7c0b05e5 MS |
633 | r = complete_move(&u->names, &other->names); |
634 | if (r < 0) | |
635 | return r; | |
23a177ef | 636 | |
ac155bb8 MS |
637 | set_free_free(other->names); |
638 | other->names = NULL; | |
639 | other->id = NULL; | |
23a177ef | 640 | |
ac155bb8 MS |
641 | SET_FOREACH(t, u->names, i) |
642 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
643 | |
644 | return 0; | |
87f0e418 LP |
645 | } |
646 | ||
09a65f92 MS |
647 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
648 | unsigned n_reserve; | |
649 | ||
650 | assert(u); | |
651 | assert(other); | |
652 | assert(d < _UNIT_DEPENDENCY_MAX); | |
653 | ||
654 | /* | |
655 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 656 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
657 | * as a whole to u by complete_move(). |
658 | */ | |
659 | if (!u->dependencies[d]) | |
660 | return 0; | |
661 | ||
662 | /* merge_dependencies() will skip a u-on-u dependency */ | |
663 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
664 | ||
665 | return set_reserve(u->dependencies[d], n_reserve); | |
666 | } | |
667 | ||
d1fab3fe | 668 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
669 | Iterator i; |
670 | Unit *back; | |
87f0e418 | 671 | int r; |
23a177ef LP |
672 | |
673 | assert(u); | |
674 | assert(other); | |
675 | assert(d < _UNIT_DEPENDENCY_MAX); | |
676 | ||
83a95334 | 677 | /* Fix backwards pointers */ |
ac155bb8 | 678 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
679 | UnitDependency k; |
680 | ||
e48614c4 | 681 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
682 | /* Do not add dependencies between u and itself */ |
683 | if (back == u) { | |
d1fab3fe | 684 | if (set_remove(back->dependencies[k], other)) |
f2341e0a | 685 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff ZJS |
686 | } else { |
687 | r = set_remove_and_put(back->dependencies[k], other, u); | |
688 | if (r == -EEXIST) | |
689 | set_remove(back->dependencies[k], other); | |
690 | else | |
691 | assert(r >= 0 || r == -ENOENT); | |
692 | } | |
e48614c4 | 693 | } |
23a177ef LP |
694 | } |
695 | ||
e66047ff | 696 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
697 | back = set_remove(other->dependencies[d], u); |
698 | if (back) | |
f2341e0a | 699 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 700 | |
7c0b05e5 MS |
701 | /* The move cannot fail. The caller must have performed a reservation. */ |
702 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 703 | |
525d3cc7 | 704 | other->dependencies[d] = set_free(other->dependencies[d]); |
23a177ef LP |
705 | } |
706 | ||
707 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 708 | UnitDependency d; |
d1fab3fe | 709 | const char *other_id = NULL; |
09a65f92 | 710 | int r; |
87f0e418 LP |
711 | |
712 | assert(u); | |
713 | assert(other); | |
ac155bb8 MS |
714 | assert(u->manager == other->manager); |
715 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 716 | |
cc916967 LP |
717 | other = unit_follow_merge(other); |
718 | ||
23a177ef LP |
719 | if (other == u) |
720 | return 0; | |
721 | ||
ac155bb8 | 722 | if (u->type != other->type) |
9e2f7c11 LP |
723 | return -EINVAL; |
724 | ||
ac155bb8 | 725 | if (!u->instance != !other->instance) |
87f0e418 LP |
726 | return -EINVAL; |
727 | ||
8a993b61 | 728 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
729 | return -EEXIST; |
730 | ||
ac155bb8 | 731 | if (other->load_state != UNIT_STUB && |
c2756a68 | 732 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 733 | return -EEXIST; |
87f0e418 | 734 | |
ac155bb8 | 735 | if (other->job) |
819e213f LP |
736 | return -EEXIST; |
737 | ||
e0209d83 MS |
738 | if (other->nop_job) |
739 | return -EEXIST; | |
740 | ||
fdf20a31 | 741 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
742 | return -EEXIST; |
743 | ||
d1fab3fe ZJS |
744 | if (other->id) |
745 | other_id = strdupa(other->id); | |
746 | ||
09a65f92 MS |
747 | /* Make reservations to ensure merge_dependencies() won't fail */ |
748 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
749 | r = reserve_dependencies(u, other, d); | |
750 | /* | |
751 | * We don't rollback reservations if we fail. We don't have | |
752 | * a way to undo reservations. A reservation is not a leak. | |
753 | */ | |
754 | if (r < 0) | |
755 | return r; | |
756 | } | |
757 | ||
87f0e418 | 758 | /* Merge names */ |
7c0b05e5 MS |
759 | r = merge_names(u, other); |
760 | if (r < 0) | |
761 | return r; | |
87f0e418 | 762 | |
57020a3a | 763 | /* Redirect all references */ |
ac155bb8 MS |
764 | while (other->refs) |
765 | unit_ref_set(other->refs, u); | |
57020a3a | 766 | |
87f0e418 LP |
767 | /* Merge dependencies */ |
768 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 769 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 770 | |
ac155bb8 MS |
771 | other->load_state = UNIT_MERGED; |
772 | other->merged_into = u; | |
23a177ef | 773 | |
3616a49c LP |
774 | /* If there is still some data attached to the other node, we |
775 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 776 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
777 | if (UNIT_VTABLE(other)->done) |
778 | UNIT_VTABLE(other)->done(other); | |
779 | ||
780 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
781 | unit_add_to_cleanup_queue(other); |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 787 | _cleanup_free_ char *s = NULL; |
23a177ef | 788 | Unit *other; |
9e2f7c11 | 789 | int r; |
23a177ef LP |
790 | |
791 | assert(u); | |
792 | assert(name); | |
793 | ||
7410616c | 794 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 795 | if (!u->instance) |
9e2f7c11 LP |
796 | return -EINVAL; |
797 | ||
7410616c LP |
798 | r = unit_name_replace_instance(name, u->instance, &s); |
799 | if (r < 0) | |
800 | return r; | |
9e2f7c11 LP |
801 | |
802 | name = s; | |
803 | } | |
804 | ||
c2756a68 | 805 | other = manager_get_unit(u->manager, name); |
7410616c LP |
806 | if (other) |
807 | return unit_merge(u, other); | |
23a177ef | 808 | |
7410616c | 809 | return unit_add_name(u, name); |
23a177ef LP |
810 | } |
811 | ||
812 | Unit* unit_follow_merge(Unit *u) { | |
813 | assert(u); | |
814 | ||
ac155bb8 MS |
815 | while (u->load_state == UNIT_MERGED) |
816 | assert_se(u = u->merged_into); | |
23a177ef LP |
817 | |
818 | return u; | |
819 | } | |
820 | ||
821 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
822 | int r; | |
823 | ||
824 | assert(u); | |
825 | assert(c); | |
826 | ||
36be24c8 ZJS |
827 | if (c->working_directory) { |
828 | r = unit_require_mounts_for(u, c->working_directory); | |
829 | if (r < 0) | |
830 | return r; | |
831 | } | |
832 | ||
833 | if (c->root_directory) { | |
834 | r = unit_require_mounts_for(u, c->root_directory); | |
835 | if (r < 0) | |
836 | return r; | |
837 | } | |
838 | ||
463d0d15 | 839 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
840 | return 0; |
841 | ||
842 | if (c->private_tmp) { | |
843 | r = unit_require_mounts_for(u, "/tmp"); | |
844 | if (r < 0) | |
845 | return r; | |
846 | ||
847 | r = unit_require_mounts_for(u, "/var/tmp"); | |
848 | if (r < 0) | |
849 | return r; | |
850 | } | |
851 | ||
ecc6e2b8 LP |
852 | if (c->std_output != EXEC_OUTPUT_KMSG && |
853 | c->std_output != EXEC_OUTPUT_SYSLOG && | |
706343f4 | 854 | c->std_output != EXEC_OUTPUT_JOURNAL && |
28dbc1e8 LP |
855 | c->std_output != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
856 | c->std_output != EXEC_OUTPUT_SYSLOG_AND_CONSOLE && | |
706343f4 | 857 | c->std_output != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
ecc6e2b8 | 858 | c->std_error != EXEC_OUTPUT_KMSG && |
085c98af | 859 | c->std_error != EXEC_OUTPUT_SYSLOG && |
706343f4 | 860 | c->std_error != EXEC_OUTPUT_JOURNAL && |
085c98af | 861 | c->std_error != EXEC_OUTPUT_KMSG_AND_CONSOLE && |
706343f4 | 862 | c->std_error != EXEC_OUTPUT_JOURNAL_AND_CONSOLE && |
28dbc1e8 | 863 | c->std_error != EXEC_OUTPUT_SYSLOG_AND_CONSOLE) |
23a177ef LP |
864 | return 0; |
865 | ||
866 | /* If syslog or kernel logging is requested, make sure our own | |
867 | * logging daemon is run first. */ | |
868 | ||
b46a529c LP |
869 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
870 | if (r < 0) | |
871 | return r; | |
23a177ef | 872 | |
87f0e418 LP |
873 | return 0; |
874 | } | |
875 | ||
87f0e418 LP |
876 | const char *unit_description(Unit *u) { |
877 | assert(u); | |
878 | ||
ac155bb8 MS |
879 | if (u->description) |
880 | return u->description; | |
87f0e418 | 881 | |
ac155bb8 | 882 | return strna(u->id); |
87f0e418 LP |
883 | } |
884 | ||
885 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 886 | char *t, **j; |
87f0e418 LP |
887 | UnitDependency d; |
888 | Iterator i; | |
47be870b | 889 | const char *prefix2; |
173e3821 | 890 | char |
a483fb59 | 891 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
892 | timestamp1[FORMAT_TIMESTAMP_MAX], |
893 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
894 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
895 | timestamp4[FORMAT_TIMESTAMP_MAX], |
896 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 897 | Unit *following; |
eeaedb7c LP |
898 | _cleanup_set_free_ Set *following_set = NULL; |
899 | int r; | |
87f0e418 LP |
900 | |
901 | assert(u); | |
ac155bb8 | 902 | assert(u->type >= 0); |
87f0e418 | 903 | |
4c940960 | 904 | prefix = strempty(prefix); |
63c372cb | 905 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
906 | |
907 | fprintf(f, | |
40d50879 | 908 | "%s-> Unit %s:\n" |
87f0e418 | 909 | "%s\tDescription: %s\n" |
9e2f7c11 | 910 | "%s\tInstance: %s\n" |
87f0e418 | 911 | "%s\tUnit Load State: %s\n" |
2fad8195 | 912 | "%s\tUnit Active State: %s\n" |
b895d155 | 913 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 914 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 915 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 916 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 917 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 918 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 919 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 920 | "%s\tTransient: %s\n" |
4ad49000 LP |
921 | "%s\tSlice: %s\n" |
922 | "%s\tCGroup: %s\n" | |
923 | "%s\tCGroup realized: %s\n" | |
6414b7c9 DS |
924 | "%s\tCGroup mask: 0x%x\n" |
925 | "%s\tCGroup members mask: 0x%x\n", | |
ac155bb8 | 926 | prefix, u->id, |
87f0e418 | 927 | prefix, unit_description(u), |
ac155bb8 MS |
928 | prefix, strna(u->instance), |
929 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 930 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 931 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
932 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
933 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
934 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
935 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 936 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 937 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 938 | prefix, yes_no(u->transient), |
4ad49000 LP |
939 | prefix, strna(unit_slice_name(u)), |
940 | prefix, strna(u->cgroup_path), | |
941 | prefix, yes_no(u->cgroup_realized), | |
bc432dc7 | 942 | prefix, u->cgroup_realized_mask, |
6414b7c9 | 943 | prefix, u->cgroup_members_mask); |
0301abf4 | 944 | |
ac155bb8 | 945 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
946 | fprintf(f, "%s\tName: %s\n", prefix, t); |
947 | ||
49dbfa7b LP |
948 | STRV_FOREACH(j, u->documentation) |
949 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
950 | ||
eeaedb7c LP |
951 | following = unit_following(u); |
952 | if (following) | |
ac155bb8 | 953 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 954 | |
eeaedb7c LP |
955 | r = unit_following_set(u, &following_set); |
956 | if (r >= 0) { | |
957 | Unit *other; | |
958 | ||
959 | SET_FOREACH(other, following_set, i) | |
960 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
961 | } | |
962 | ||
ac155bb8 MS |
963 | if (u->fragment_path) |
964 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 965 | |
1b64d026 LP |
966 | if (u->source_path) |
967 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
968 | ||
ae7a7182 | 969 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 970 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 971 | |
36c16a7c | 972 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 973 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 974 | |
f189ab18 LP |
975 | if (u->job_timeout_action != FAILURE_ACTION_NONE) |
976 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, failure_action_to_string(u->job_timeout_action)); | |
977 | ||
978 | if (u->job_timeout_reboot_arg) | |
979 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
980 | ||
59fccdc5 LP |
981 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
982 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 983 | |
ac155bb8 | 984 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
985 | fprintf(f, |
986 | "%s\tCondition Timestamp: %s\n" | |
987 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
988 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
989 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 990 | |
59fccdc5 LP |
991 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
992 | fprintf(f, | |
993 | "%s\tAssert Timestamp: %s\n" | |
994 | "%s\tAssert Result: %s\n", | |
995 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
996 | prefix, yes_no(u->assert_result)); | |
997 | ||
87f0e418 LP |
998 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
999 | Unit *other; | |
1000 | ||
ac155bb8 MS |
1001 | SET_FOREACH(other, u->dependencies[d], i) |
1002 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
1003 | } |
1004 | ||
7c8fa05c | 1005 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
1006 | fprintf(f, |
1007 | "%s\tRequiresMountsFor:", prefix); | |
1008 | ||
1009 | STRV_FOREACH(j, u->requires_mounts_for) | |
1010 | fprintf(f, " %s", *j); | |
1011 | ||
1012 | fputs("\n", f); | |
1013 | } | |
1014 | ||
ac155bb8 | 1015 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1016 | |
b0650475 | 1017 | fprintf(f, |
a40eb732 | 1018 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1019 | "%s\tRefuseManualStart: %s\n" |
1020 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1021 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1022 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1023 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1024 | prefix, yes_no(u->stop_when_unneeded), |
1025 | prefix, yes_no(u->refuse_manual_start), | |
1026 | prefix, yes_no(u->refuse_manual_stop), | |
1027 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1028 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1029 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1030 | |
23a177ef LP |
1031 | if (UNIT_VTABLE(u)->dump) |
1032 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1033 | |
ac155bb8 | 1034 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1035 | fprintf(f, |
1036 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1037 | prefix, u->merged_into->id); |
1038 | else if (u->load_state == UNIT_ERROR) | |
1039 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1040 | |
87f0e418 | 1041 | |
ac155bb8 MS |
1042 | if (u->job) |
1043 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1044 | |
e0209d83 MS |
1045 | if (u->nop_job) |
1046 | job_dump(u->nop_job, f, prefix2); | |
1047 | ||
87f0e418 LP |
1048 | } |
1049 | ||
1050 | /* Common implementation for multiple backends */ | |
e537352b | 1051 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1052 | int r; |
1053 | ||
1054 | assert(u); | |
23a177ef | 1055 | |
e48614c4 | 1056 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1057 | r = unit_load_fragment(u); |
1058 | if (r < 0) | |
23a177ef LP |
1059 | return r; |
1060 | ||
ac155bb8 | 1061 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1062 | return -ENOENT; |
1063 | ||
1064 | /* Load drop-in directory data */ | |
4ad49000 LP |
1065 | r = unit_load_dropin(unit_follow_merge(u)); |
1066 | if (r < 0) | |
23a177ef LP |
1067 | return r; |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | /* Common implementation for multiple backends */ | |
e537352b | 1073 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1074 | int r; |
87f0e418 LP |
1075 | |
1076 | assert(u); | |
1077 | ||
23a177ef LP |
1078 | /* Same as unit_load_fragment_and_dropin(), but whether |
1079 | * something can be loaded or not doesn't matter. */ | |
1080 | ||
1081 | /* Load a .service file */ | |
4ad49000 LP |
1082 | r = unit_load_fragment(u); |
1083 | if (r < 0) | |
87f0e418 LP |
1084 | return r; |
1085 | ||
ac155bb8 MS |
1086 | if (u->load_state == UNIT_STUB) |
1087 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1088 | |
87f0e418 | 1089 | /* Load drop-in directory data */ |
4ad49000 LP |
1090 | r = unit_load_dropin(unit_follow_merge(u)); |
1091 | if (r < 0) | |
87f0e418 LP |
1092 | return r; |
1093 | ||
23a177ef | 1094 | return 0; |
87f0e418 LP |
1095 | } |
1096 | ||
bba34eed | 1097 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1098 | assert(u); |
1099 | assert(target); | |
1100 | ||
ac155bb8 | 1101 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1102 | return 0; |
1103 | ||
35b8ca3a | 1104 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1105 | * that loop check below is reliable */ |
ac155bb8 MS |
1106 | if (u->load_state != UNIT_LOADED || |
1107 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1108 | return 0; |
1109 | ||
21256a2b LP |
1110 | /* If either side wants no automatic dependencies, then let's |
1111 | * skip this */ | |
ac155bb8 MS |
1112 | if (!u->default_dependencies || |
1113 | !target->default_dependencies) | |
21256a2b LP |
1114 | return 0; |
1115 | ||
98bc2000 | 1116 | /* Don't create loops */ |
ac155bb8 | 1117 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1118 | return 0; |
1119 | ||
1120 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1121 | } | |
1122 | ||
e954c9cf | 1123 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1124 | |
21256a2b LP |
1125 | static const UnitDependency deps[] = { |
1126 | UNIT_REQUIRED_BY, | |
be7d9ff7 | 1127 | UNIT_REQUISITE_OF, |
21256a2b LP |
1128 | UNIT_WANTED_BY, |
1129 | UNIT_BOUND_BY | |
1130 | }; | |
1131 | ||
bba34eed | 1132 | Unit *target; |
98bc2000 | 1133 | Iterator i; |
21256a2b | 1134 | unsigned k; |
db57f3c6 | 1135 | int r = 0; |
98bc2000 LP |
1136 | |
1137 | assert(u); | |
1138 | ||
21256a2b | 1139 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1140 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1141 | r = unit_add_default_target_dependency(u, target); | |
1142 | if (r < 0) | |
21256a2b | 1143 | return r; |
a016b922 LP |
1144 | } |
1145 | ||
e954c9cf LP |
1146 | return r; |
1147 | } | |
4ad49000 | 1148 | |
e954c9cf LP |
1149 | static int unit_add_slice_dependencies(Unit *u) { |
1150 | assert(u); | |
b81884e7 | 1151 | |
35b7ff80 | 1152 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1153 | return 0; |
1154 | ||
1155 | if (UNIT_ISSET(u->slice)) | |
8c8da0e0 | 1156 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true); |
e954c9cf | 1157 | |
8c8da0e0 | 1158 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1159 | return 0; |
1160 | ||
8c8da0e0 | 1161 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1162 | } |
1163 | ||
e954c9cf | 1164 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1165 | char **i; |
1166 | int r; | |
1167 | ||
1168 | assert(u); | |
1169 | ||
1170 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1171 | char prefix[strlen(*i) + 1]; | |
1172 | ||
1173 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
c7c89abb | 1174 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1175 | Unit *m; |
1176 | ||
c7c89abb | 1177 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1178 | if (r < 0) |
1179 | return r; | |
c7c89abb FB |
1180 | |
1181 | m = manager_get_unit(u->manager, p); | |
1182 | if (!m) { | |
1183 | /* Make sure to load the mount unit if | |
1184 | * it exists. If so the dependencies | |
1185 | * on this unit will be added later | |
1186 | * during the loading of the mount | |
1187 | * unit. */ | |
1188 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1189 | continue; |
c7c89abb | 1190 | } |
9588bc32 LP |
1191 | if (m == u) |
1192 | continue; | |
1193 | ||
1194 | if (m->load_state != UNIT_LOADED) | |
1195 | continue; | |
1196 | ||
1197 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1198 | if (r < 0) | |
1199 | return r; | |
1200 | ||
1201 | if (m->fragment_path) { | |
1202 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1203 | if (r < 0) | |
1204 | return r; | |
1205 | } | |
1206 | } | |
1207 | } | |
1208 | ||
1209 | return 0; | |
1210 | } | |
1211 | ||
95ae05c0 WC |
1212 | static int unit_add_startup_units(Unit *u) { |
1213 | CGroupContext *c; | |
5269eb6b | 1214 | int r; |
95ae05c0 WC |
1215 | |
1216 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1217 | if (!c) |
1218 | return 0; | |
1219 | ||
d53d9474 | 1220 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1221 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1222 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1223 | return 0; |
1224 | ||
5269eb6b LP |
1225 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1226 | if (r < 0) | |
1227 | return r; | |
1228 | ||
756c09e6 | 1229 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1230 | } |
1231 | ||
87f0e418 LP |
1232 | int unit_load(Unit *u) { |
1233 | int r; | |
1234 | ||
1235 | assert(u); | |
1236 | ||
ac155bb8 | 1237 | if (u->in_load_queue) { |
71fda00f | 1238 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1239 | u->in_load_queue = false; |
87f0e418 LP |
1240 | } |
1241 | ||
ac155bb8 | 1242 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1243 | return -EINVAL; |
1244 | ||
ac155bb8 | 1245 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1246 | return 0; |
1247 | ||
4f4afc88 LP |
1248 | if (u->transient_file) { |
1249 | r = fflush_and_check(u->transient_file); | |
1250 | if (r < 0) | |
1251 | goto fail; | |
1252 | ||
1253 | fclose(u->transient_file); | |
1254 | u->transient_file = NULL; | |
f9ba08fb | 1255 | |
f76707da | 1256 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1257 | } |
1258 | ||
c2756a68 LP |
1259 | if (UNIT_VTABLE(u)->load) { |
1260 | r = UNIT_VTABLE(u)->load(u); | |
1261 | if (r < 0) | |
87f0e418 | 1262 | goto fail; |
c2756a68 | 1263 | } |
23a177ef | 1264 | |
ac155bb8 | 1265 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1266 | r = -ENOENT; |
1267 | goto fail; | |
1268 | } | |
1269 | ||
7c8fa05c | 1270 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1271 | |
e954c9cf LP |
1272 | r = unit_add_target_dependencies(u); |
1273 | if (r < 0) | |
1274 | goto fail; | |
1275 | ||
1276 | r = unit_add_slice_dependencies(u); | |
1277 | if (r < 0) | |
1278 | goto fail; | |
c2756a68 | 1279 | |
e954c9cf | 1280 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1281 | if (r < 0) |
c2756a68 | 1282 | goto fail; |
7c8fa05c | 1283 | |
95ae05c0 WC |
1284 | r = unit_add_startup_units(u); |
1285 | if (r < 0) | |
1286 | goto fail; | |
1287 | ||
bc432dc7 | 1288 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1289 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1290 | r = -EINVAL; |
1291 | goto fail; | |
1292 | } | |
bc432dc7 LP |
1293 | |
1294 | unit_update_cgroup_members_masks(u); | |
f68319bb LP |
1295 | } |
1296 | ||
ac155bb8 | 1297 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1298 | |
1299 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1300 | unit_add_to_gc_queue(u); |
87f0e418 | 1301 | |
87f0e418 LP |
1302 | return 0; |
1303 | ||
1304 | fail: | |
c2756a68 | 1305 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1306 | u->load_error = r; |
c1e1601e | 1307 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1308 | unit_add_to_gc_queue(u); |
23a177ef | 1309 | |
f2341e0a | 1310 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1311 | |
87f0e418 LP |
1312 | return r; |
1313 | } | |
1314 | ||
49365733 LP |
1315 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1316 | Condition *c; | |
1317 | int triggered = -1; | |
1318 | ||
1319 | assert(u); | |
1320 | assert(to_string); | |
1321 | ||
1322 | /* If the condition list is empty, then it is true */ | |
1323 | if (!first) | |
1324 | return true; | |
1325 | ||
1326 | /* Otherwise, if all of the non-trigger conditions apply and | |
1327 | * if any of the trigger conditions apply (unless there are | |
1328 | * none) we return true */ | |
1329 | LIST_FOREACH(conditions, c, first) { | |
1330 | int r; | |
1331 | ||
1332 | r = condition_test(c); | |
1333 | if (r < 0) | |
f2341e0a LP |
1334 | log_unit_warning(u, |
1335 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1336 | to_string(c->type), |
1337 | c->trigger ? "|" : "", | |
1338 | c->negate ? "!" : "", | |
f2341e0a | 1339 | c->parameter); |
49365733 | 1340 | else |
f2341e0a LP |
1341 | log_unit_debug(u, |
1342 | "%s=%s%s%s %s.", | |
49365733 LP |
1343 | to_string(c->type), |
1344 | c->trigger ? "|" : "", | |
1345 | c->negate ? "!" : "", | |
1346 | c->parameter, | |
f2341e0a | 1347 | condition_result_to_string(c->result)); |
49365733 LP |
1348 | |
1349 | if (!c->trigger && r <= 0) | |
1350 | return false; | |
1351 | ||
1352 | if (c->trigger && triggered <= 0) | |
1353 | triggered = r > 0; | |
1354 | } | |
1355 | ||
1356 | return triggered != 0; | |
1357 | } | |
1358 | ||
9588bc32 | 1359 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1360 | assert(u); |
1361 | ||
ac155bb8 | 1362 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1363 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1364 | |
ac155bb8 | 1365 | return u->condition_result; |
90bbc946 LP |
1366 | } |
1367 | ||
59fccdc5 LP |
1368 | static bool unit_assert_test(Unit *u) { |
1369 | assert(u); | |
1370 | ||
1371 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1372 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1373 | |
1374 | return u->assert_result; | |
1375 | } | |
1376 | ||
df446f96 LP |
1377 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1378 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1379 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1380 | REENABLE_WARNING; | |
1381 | } | |
1382 | ||
44a6b1b6 | 1383 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1384 | const char *format; |
a85ca902 | 1385 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1386 | |
1387 | assert(u); | |
df446f96 | 1388 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1389 | |
b5bf308b | 1390 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1391 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1392 | if (format_table) { | |
1393 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1394 | if (format) | |
1395 | return format; | |
1396 | } | |
1397 | } | |
877d54e9 LP |
1398 | |
1399 | /* Return generic strings */ | |
1400 | if (t == JOB_START) | |
1401 | return "Starting %s."; | |
1402 | else if (t == JOB_STOP) | |
1403 | return "Stopping %s."; | |
b5bf308b | 1404 | else |
877d54e9 | 1405 | return "Reloading %s."; |
877d54e9 LP |
1406 | } |
1407 | ||
1408 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1409 | const char *format; | |
1410 | ||
1411 | assert(u); | |
1412 | ||
df446f96 LP |
1413 | /* Reload status messages have traditionally not been printed to console. */ |
1414 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1415 | return; | |
1416 | ||
877d54e9 | 1417 | format = unit_get_status_message_format(u, t); |
c6918296 | 1418 | |
bcfce235 | 1419 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1420 | unit_status_printf(u, "", format); |
bcfce235 | 1421 | REENABLE_WARNING; |
c6918296 MS |
1422 | } |
1423 | ||
877d54e9 LP |
1424 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
1425 | const char *format; | |
1426 | char buf[LINE_MAX]; | |
1427 | sd_id128_t mid; | |
1428 | ||
1429 | assert(u); | |
1430 | ||
df446f96 | 1431 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1432 | return; |
1433 | ||
81270860 LP |
1434 | if (log_on_console()) |
1435 | return; | |
1436 | ||
877d54e9 LP |
1437 | /* We log status messages for all units and all operations. */ |
1438 | ||
a85ca902 | 1439 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1440 | |
bcfce235 | 1441 | DISABLE_WARNING_FORMAT_NONLITERAL; |
d054f0a4 | 1442 | xsprintf(buf, format, unit_description(u)); |
bcfce235 | 1443 | REENABLE_WARNING; |
877d54e9 LP |
1444 | |
1445 | mid = t == JOB_START ? SD_MESSAGE_UNIT_STARTING : | |
1446 | t == JOB_STOP ? SD_MESSAGE_UNIT_STOPPING : | |
1447 | SD_MESSAGE_UNIT_RELOADING; | |
1448 | ||
f2341e0a LP |
1449 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1450 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1451 | * closely what is written to screen using the status output, | |
1452 | * which is supposed the highest level, friendliest output | |
1453 | * possible, which means we should avoid the low-level unit | |
1454 | * name. */ | |
1455 | log_struct(LOG_INFO, | |
1456 | LOG_MESSAGE_ID(mid), | |
1457 | LOG_UNIT_ID(u), | |
1458 | LOG_MESSAGE("%s", buf), | |
1459 | NULL); | |
877d54e9 | 1460 | } |
877d54e9 | 1461 | |
d1a34ae9 | 1462 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1463 | assert(u); |
1464 | assert(t >= 0); | |
1465 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1466 | |
1467 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1468 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1469 | } |
1470 | ||
07299350 | 1471 | int unit_start_limit_test(Unit *u) { |
6bf0f408 LP |
1472 | assert(u); |
1473 | ||
1474 | if (ratelimit_test(&u->start_limit)) { | |
1475 | u->start_limit_hit = false; | |
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | log_unit_warning(u, "Start request repeated too quickly."); | |
1480 | u->start_limit_hit = true; | |
1481 | ||
1482 | return failure_action(u->manager, u->start_limit_action, u->reboot_arg); | |
1483 | } | |
1484 | ||
87f0e418 | 1485 | /* Errors: |
6bf0f408 LP |
1486 | * -EBADR: This unit type does not support starting. |
1487 | * -EALREADY: Unit is already started. | |
1488 | * -EAGAIN: An operation is already in progress. Retry later. | |
1489 | * -ECANCELED: Too many requests for now. | |
1490 | * -EPROTO: Assert failed | |
1491 | * -EINVAL: Unit not loaded | |
1492 | * -EOPNOTSUPP: Unit type not supported | |
87f0e418 LP |
1493 | */ |
1494 | int unit_start(Unit *u) { | |
1495 | UnitActiveState state; | |
92ab323c | 1496 | Unit *following; |
87f0e418 LP |
1497 | |
1498 | assert(u); | |
1499 | ||
a82e5507 LP |
1500 | /* If this is already started, then this will succeed. Note |
1501 | * that this will even succeed if this unit is not startable | |
1502 | * by the user. This is relied on to detect when we need to | |
1503 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1504 | state = unit_active_state(u); |
1505 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1506 | return -EALREADY; | |
1507 | ||
6bf0f408 LP |
1508 | /* Units that aren't loaded cannot be started */ |
1509 | if (u->load_state != UNIT_LOADED) | |
1510 | return -EINVAL; | |
1511 | ||
a82e5507 LP |
1512 | /* If the conditions failed, don't do anything at all. If we |
1513 | * already are activating this call might still be useful to | |
1514 | * speed up activation in case there is some hold-off time, | |
1515 | * but we don't want to recheck the condition in that case. */ | |
1516 | if (state != UNIT_ACTIVATING && | |
1517 | !unit_condition_test(u)) { | |
f2341e0a | 1518 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1519 | return -EALREADY; |
1520 | } | |
1521 | ||
59fccdc5 LP |
1522 | /* If the asserts failed, fail the entire job */ |
1523 | if (state != UNIT_ACTIVATING && | |
1524 | !unit_assert_test(u)) { | |
f2341e0a | 1525 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1526 | return -EPROTO; |
1527 | } | |
1528 | ||
d11a7645 LP |
1529 | /* Units of types that aren't supported cannot be |
1530 | * started. Note that we do this test only after the condition | |
1531 | * checks, so that we rather return condition check errors | |
1532 | * (which are usually not considered a true failure) than "not | |
1533 | * supported" errors (which are considered a failure). | |
1534 | */ | |
1535 | if (!unit_supported(u)) | |
1536 | return -EOPNOTSUPP; | |
1537 | ||
92ab323c | 1538 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1539 | following = unit_following(u); |
1540 | if (following) { | |
f2341e0a | 1541 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1542 | return unit_start(following); |
1543 | } | |
1544 | ||
1545 | /* If it is stopped, but we cannot start it, then fail */ | |
1546 | if (!UNIT_VTABLE(u)->start) | |
1547 | return -EBADR; | |
1548 | ||
87f0e418 LP |
1549 | /* We don't suppress calls to ->start() here when we are |
1550 | * already starting, to allow this request to be used as a | |
1551 | * "hurry up" call, for example when the unit is in some "auto | |
1552 | * restart" state where it waits for a holdoff timer to elapse | |
1553 | * before it will start again. */ | |
1554 | ||
c1e1601e | 1555 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1556 | |
d1a34ae9 | 1557 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1558 | } |
1559 | ||
1560 | bool unit_can_start(Unit *u) { | |
1561 | assert(u); | |
1562 | ||
8ff4d2ab LP |
1563 | if (u->load_state != UNIT_LOADED) |
1564 | return false; | |
1565 | ||
1566 | if (!unit_supported(u)) | |
1567 | return false; | |
1568 | ||
87f0e418 LP |
1569 | return !!UNIT_VTABLE(u)->start; |
1570 | } | |
1571 | ||
2528a7a6 LP |
1572 | bool unit_can_isolate(Unit *u) { |
1573 | assert(u); | |
1574 | ||
1575 | return unit_can_start(u) && | |
ac155bb8 | 1576 | u->allow_isolate; |
2528a7a6 LP |
1577 | } |
1578 | ||
87f0e418 LP |
1579 | /* Errors: |
1580 | * -EBADR: This unit type does not support stopping. | |
1581 | * -EALREADY: Unit is already stopped. | |
1582 | * -EAGAIN: An operation is already in progress. Retry later. | |
1583 | */ | |
1584 | int unit_stop(Unit *u) { | |
1585 | UnitActiveState state; | |
92ab323c | 1586 | Unit *following; |
87f0e418 LP |
1587 | |
1588 | assert(u); | |
1589 | ||
87f0e418 | 1590 | state = unit_active_state(u); |
fdf20a31 | 1591 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1592 | return -EALREADY; |
1593 | ||
0faacd47 LP |
1594 | following = unit_following(u); |
1595 | if (following) { | |
f2341e0a | 1596 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1597 | return unit_stop(following); |
1598 | } | |
1599 | ||
7898b0cf LP |
1600 | if (!UNIT_VTABLE(u)->stop) |
1601 | return -EBADR; | |
1602 | ||
c1e1601e | 1603 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1604 | |
d1a34ae9 | 1605 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1606 | } |
1607 | ||
1608 | /* Errors: | |
1609 | * -EBADR: This unit type does not support reloading. | |
1610 | * -ENOEXEC: Unit is not started. | |
1611 | * -EAGAIN: An operation is already in progress. Retry later. | |
1612 | */ | |
1613 | int unit_reload(Unit *u) { | |
1614 | UnitActiveState state; | |
92ab323c | 1615 | Unit *following; |
87f0e418 LP |
1616 | |
1617 | assert(u); | |
1618 | ||
ac155bb8 | 1619 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1620 | return -EINVAL; |
1621 | ||
87f0e418 LP |
1622 | if (!unit_can_reload(u)) |
1623 | return -EBADR; | |
1624 | ||
1625 | state = unit_active_state(u); | |
e364ad06 | 1626 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1627 | return -EALREADY; |
1628 | ||
6a371e23 | 1629 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1630 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1631 | return -ENOEXEC; |
6a371e23 | 1632 | } |
87f0e418 | 1633 | |
e48614c4 ZJS |
1634 | following = unit_following(u); |
1635 | if (following) { | |
f2341e0a | 1636 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1637 | return unit_reload(following); |
1638 | } | |
1639 | ||
c1e1601e | 1640 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1641 | |
d1a34ae9 | 1642 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1643 | } |
1644 | ||
1645 | bool unit_can_reload(Unit *u) { | |
1646 | assert(u); | |
1647 | ||
1648 | if (!UNIT_VTABLE(u)->reload) | |
1649 | return false; | |
1650 | ||
1651 | if (!UNIT_VTABLE(u)->can_reload) | |
1652 | return true; | |
1653 | ||
1654 | return UNIT_VTABLE(u)->can_reload(u); | |
1655 | } | |
1656 | ||
b4a16b7b | 1657 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 | 1658 | |
4afd3348 | 1659 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
4bd29fe5 | 1660 | |
be7d9ff7 LP |
1661 | static const UnitDependency needed_dependencies[] = { |
1662 | UNIT_REQUIRED_BY, | |
084918ba | 1663 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1664 | UNIT_WANTED_BY, |
1665 | UNIT_BOUND_BY, | |
1666 | }; | |
1667 | ||
f3bff0eb | 1668 | Unit *other; |
be7d9ff7 LP |
1669 | Iterator i; |
1670 | unsigned j; | |
1671 | int r; | |
f3bff0eb LP |
1672 | |
1673 | assert(u); | |
1674 | ||
1675 | /* If this service shall be shut down when unneeded then do | |
1676 | * so. */ | |
1677 | ||
ac155bb8 | 1678 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1679 | return; |
1680 | ||
1681 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1682 | return; | |
1683 | ||
be7d9ff7 | 1684 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) |
f3b85044 | 1685 | SET_FOREACH(other, u->dependencies[needed_dependencies[j]], i) |
be7d9ff7 LP |
1686 | if (unit_active_or_pending(other)) |
1687 | return; | |
b81884e7 | 1688 | |
595bfe7d | 1689 | /* If stopping a unit fails continuously we might enter a stop |
bea355da LP |
1690 | * loop here, hence stop acting on the service being |
1691 | * unnecessary after a while. */ | |
67bfdc97 | 1692 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
1693 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1694 | return; | |
1695 | } | |
1696 | ||
f2341e0a | 1697 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1698 | |
1699 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
4bd29fe5 | 1700 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
be7d9ff7 | 1701 | if (r < 0) |
4bd29fe5 | 1702 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
f3bff0eb LP |
1703 | } |
1704 | ||
ff502445 | 1705 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 1706 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
1707 | bool stop = false; |
1708 | Unit *other; | |
1709 | Iterator i; | |
67bfdc97 | 1710 | int r; |
ff502445 LP |
1711 | |
1712 | assert(u); | |
1713 | ||
1714 | if (u->job) | |
1715 | return; | |
1716 | ||
1717 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1718 | return; | |
1719 | ||
1720 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1721 | if (other->job) | |
1722 | continue; | |
1723 | ||
1724 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1725 | continue; | |
1726 | ||
1727 | stop = true; | |
98f738b6 | 1728 | break; |
ff502445 LP |
1729 | } |
1730 | ||
1731 | if (!stop) | |
1732 | return; | |
1733 | ||
595bfe7d | 1734 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
1735 | * loop here, hence stop acting on the service being |
1736 | * unnecessary after a while. */ | |
1737 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
1738 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
1739 | return; | |
1740 | } | |
1741 | ||
98f738b6 | 1742 | assert(other); |
f2341e0a | 1743 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
1744 | |
1745 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 1746 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 1747 | if (r < 0) |
4bd29fe5 | 1748 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
1749 | } |
1750 | ||
87f0e418 LP |
1751 | static void retroactively_start_dependencies(Unit *u) { |
1752 | Iterator i; | |
1753 | Unit *other; | |
1754 | ||
1755 | assert(u); | |
1756 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1757 | ||
ac155bb8 MS |
1758 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1759 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1760 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1761 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 1762 | |
7f2cddae | 1763 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1764 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1765 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1766 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 1767 | |
ac155bb8 MS |
1768 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1769 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1770 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1771 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 1772 | |
ac155bb8 | 1773 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1774 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1775 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 1776 | |
ac155bb8 | 1777 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1778 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1779 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
1780 | } |
1781 | ||
1782 | static void retroactively_stop_dependencies(Unit *u) { | |
1783 | Iterator i; | |
1784 | Unit *other; | |
1785 | ||
1786 | assert(u); | |
1787 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1788 | ||
b81884e7 | 1789 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1790 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1791 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1792 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
1793 | } |
1794 | ||
1795 | static void check_unneeded_dependencies(Unit *u) { | |
1796 | Iterator i; | |
1797 | Unit *other; | |
1798 | ||
1799 | assert(u); | |
1800 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1801 | |
1802 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1803 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1804 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1805 | unit_check_unneeded(other); |
ac155bb8 | 1806 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1807 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1808 | unit_check_unneeded(other); |
ac155bb8 | 1809 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1810 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1811 | unit_check_unneeded(other); |
7f2cddae | 1812 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1813 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1814 | unit_check_unneeded(other); | |
87f0e418 LP |
1815 | } |
1816 | ||
3ecaa09b | 1817 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1818 | Unit *other; |
1819 | Iterator i; | |
1820 | ||
1821 | assert(u); | |
1822 | ||
ac155bb8 | 1823 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1824 | return; |
1825 | ||
f2341e0a | 1826 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 1827 | |
ac155bb8 | 1828 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1829 | int r; |
1830 | ||
4bd29fe5 | 1831 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, NULL); |
c1b6628d | 1832 | if (r < 0) |
f2341e0a | 1833 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1834 | } |
c0daa706 LP |
1835 | } |
1836 | ||
3ecaa09b LP |
1837 | void unit_trigger_notify(Unit *u) { |
1838 | Unit *other; | |
1839 | Iterator i; | |
1840 | ||
1841 | assert(u); | |
1842 | ||
1843 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1844 | if (UNIT_VTABLE(other)->trigger_notify) | |
1845 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
1846 | } | |
1847 | ||
e2f3b44c | 1848 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 1849 | Manager *m; |
7e6e7b06 | 1850 | bool unexpected; |
a096ed36 | 1851 | |
87f0e418 LP |
1852 | assert(u); |
1853 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
1854 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 1855 | |
8e471ccd LP |
1856 | /* Note that this is called for all low-level state changes, |
1857 | * even if they might map to the same high-level | |
865cc19a | 1858 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 1859 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 1860 | * this function will be called too! */ |
87f0e418 | 1861 | |
546ac4f0 MS |
1862 | m = u->manager; |
1863 | ||
f755e3b7 | 1864 | /* Update timestamps for state changes */ |
2c289ea8 | 1865 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 1866 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 1867 | |
bdbf9951 | 1868 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 1869 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 1870 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 1871 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
1872 | |
1873 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 1874 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 1875 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 1876 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 1877 | } |
87f0e418 | 1878 | |
865cc19a | 1879 | /* Keep track of failed units */ |
5269eb6b | 1880 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 LP |
1881 | |
1882 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 1883 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
efdb0237 | 1884 | unit_prune_cgroup(u); |
fb385181 | 1885 | |
9cd86184 | 1886 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 1887 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 1888 | * why it is handled in service_set_state() */ |
7ed9f6cd | 1889 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
1890 | ExecContext *ec; |
1891 | ||
1892 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 1893 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 | 1894 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
313cefa1 | 1895 | m->n_on_console--; |
31a7eb86 ZJS |
1896 | |
1897 | if (m->n_on_console == 0) | |
1898 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 1899 | m->no_console_output = false; |
31a7eb86 | 1900 | } else |
313cefa1 | 1901 | m->n_on_console++; |
7ed9f6cd MS |
1902 | } |
1903 | } | |
1904 | ||
ac155bb8 | 1905 | if (u->job) { |
7e6e7b06 | 1906 | unexpected = false; |
87f0e418 | 1907 | |
ac155bb8 | 1908 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
1909 | |
1910 | /* So we reached a different state for this | |
1911 | * job. Let's see if we can run it now if it | |
1912 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 1913 | job_add_to_run_queue(u->job); |
87f0e418 | 1914 | |
b410e6b9 | 1915 | /* Let's check whether this state change constitutes a |
35b8ca3a | 1916 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 1917 | * hence needs to invalidate jobs. */ |
87f0e418 | 1918 | |
ac155bb8 | 1919 | switch (u->job->type) { |
87f0e418 | 1920 | |
b410e6b9 LP |
1921 | case JOB_START: |
1922 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 1923 | |
b410e6b9 | 1924 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
833f92ad | 1925 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 1926 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 1927 | unexpected = true; |
41b02ec7 | 1928 | |
fdf20a31 | 1929 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 1930 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
b410e6b9 | 1931 | } |
87f0e418 | 1932 | |
b410e6b9 | 1933 | break; |
87f0e418 | 1934 | |
b410e6b9 LP |
1935 | case JOB_RELOAD: |
1936 | case JOB_RELOAD_OR_START: | |
3282591d | 1937 | case JOB_TRY_RELOAD: |
87f0e418 | 1938 | |
ac155bb8 | 1939 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 1940 | if (ns == UNIT_ACTIVE) |
833f92ad | 1941 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
032ff4af | 1942 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 1943 | unexpected = true; |
41b02ec7 | 1944 | |
fdf20a31 | 1945 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 1946 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
a096ed36 | 1947 | } |
b410e6b9 | 1948 | } |
87f0e418 | 1949 | |
b410e6b9 | 1950 | break; |
87f0e418 | 1951 | |
b410e6b9 LP |
1952 | case JOB_STOP: |
1953 | case JOB_RESTART: | |
1954 | case JOB_TRY_RESTART: | |
87f0e418 | 1955 | |
fdf20a31 | 1956 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 1957 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 1958 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 1959 | unexpected = true; |
833f92ad | 1960 | job_finish_and_invalidate(u->job, JOB_FAILED, true, false); |
b410e6b9 | 1961 | } |
87f0e418 | 1962 | |
b410e6b9 | 1963 | break; |
87f0e418 | 1964 | |
b410e6b9 LP |
1965 | default: |
1966 | assert_not_reached("Job type unknown"); | |
87f0e418 | 1967 | } |
87f0e418 | 1968 | |
7e6e7b06 LP |
1969 | } else |
1970 | unexpected = true; | |
1971 | ||
2c289ea8 | 1972 | if (!MANAGER_IS_RELOADING(m)) { |
f3bff0eb | 1973 | |
bdbf9951 LP |
1974 | /* If this state change happened without being |
1975 | * requested by a job, then let's retroactively start | |
1976 | * or stop dependencies. We skip that step when | |
1977 | * deserializing, since we don't want to create any | |
1978 | * additional jobs just because something is already | |
1979 | * activated. */ | |
1980 | ||
1981 | if (unexpected) { | |
1982 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
1983 | retroactively_start_dependencies(u); | |
1984 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
1985 | retroactively_stop_dependencies(u); | |
1986 | } | |
5de9682c | 1987 | |
cd0504d0 | 1988 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 1989 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
1990 | check_unneeded_dependencies(u); |
1991 | ||
bdbf9951 | 1992 | if (ns != os && ns == UNIT_FAILED) { |
f2341e0a | 1993 | log_unit_notice(u, "Unit entered failed state."); |
3ecaa09b | 1994 | unit_start_on_failure(u); |
cd6d0a45 | 1995 | } |
3b2775c5 | 1996 | } |
e537352b | 1997 | |
3b2775c5 LP |
1998 | /* Some names are special */ |
1999 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2000 | ||
2001 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 2002 | /* The bus might have just become available, |
3b2775c5 LP |
2003 | * hence try to connect to it, if we aren't |
2004 | * yet connected. */ | |
546ac4f0 | 2005 | bus_init(m, true); |
3b2775c5 | 2006 | |
ac155bb8 | 2007 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 2008 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
2c289ea8 | 2009 | !MANAGER_IS_RELOADING(m)) { |
3b2775c5 | 2010 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 2011 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 2012 | u->in_audit = true; |
3b2775c5 | 2013 | } |
e983b760 | 2014 | |
3b2775c5 | 2015 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 2016 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 2017 | |
3b2775c5 | 2018 | } else { |
bdbf9951 | 2019 | |
3b2775c5 LP |
2020 | /* We don't care about D-Bus here, since we'll get an |
2021 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 2022 | |
ac155bb8 | 2023 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
2024 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
2025 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
2c289ea8 | 2026 | !MANAGER_IS_RELOADING(m)) { |
4927fcae | 2027 | |
3b2775c5 LP |
2028 | /* Hmm, if there was no start record written |
2029 | * write it now, so that we always have a nice | |
2030 | * pair */ | |
ac155bb8 | 2031 | if (!u->in_audit) { |
546ac4f0 | 2032 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 2033 | |
3b2775c5 | 2034 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 2035 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
2036 | } else |
2037 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 2038 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 2039 | |
ac155bb8 | 2040 | u->in_audit = false; |
cd6d0a45 | 2041 | } |
f278026d LP |
2042 | } |
2043 | ||
546ac4f0 | 2044 | manager_recheck_journal(m); |
3ecaa09b | 2045 | unit_trigger_notify(u); |
3b2775c5 | 2046 | |
2c289ea8 | 2047 | if (!MANAGER_IS_RELOADING(u->manager)) { |
ff502445 LP |
2048 | /* Maybe we finished startup and are now ready for |
2049 | * being stopped because unneeded? */ | |
bf6dcfa6 | 2050 | unit_check_unneeded(u); |
c1e1601e | 2051 | |
ff502445 LP |
2052 | /* Maybe we finished startup, but something we needed |
2053 | * has vanished? Let's die then. (This happens when | |
2054 | * something BindsTo= to a Type=oneshot unit, as these | |
2055 | * units go directly from starting to inactive, | |
2056 | * without ever entering started.) */ | |
2057 | unit_check_binds_to(u); | |
2058 | } | |
2059 | ||
c1e1601e | 2060 | unit_add_to_dbus_queue(u); |
701cc384 | 2061 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2062 | } |
2063 | ||
87f0e418 | 2064 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
2065 | int q, r; |
2066 | ||
87f0e418 LP |
2067 | assert(u); |
2068 | assert(pid >= 1); | |
2069 | ||
5ba6985b LP |
2070 | /* Watch a specific PID. We only support one or two units |
2071 | * watching each PID for now, not more. */ | |
2072 | ||
d5099efc | 2073 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2074 | if (r < 0) |
2075 | return r; | |
2076 | ||
d5099efc | 2077 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
2078 | if (r < 0) |
2079 | return r; | |
2080 | ||
fea72cc0 | 2081 | r = hashmap_put(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
5ba6985b | 2082 | if (r == -EEXIST) { |
d5099efc | 2083 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2084 | if (r < 0) |
2085 | return r; | |
05e343b7 | 2086 | |
fea72cc0 | 2087 | r = hashmap_put(u->manager->watch_pids2, PID_TO_PTR(pid), u); |
5ba6985b | 2088 | } |
a911bb9a | 2089 | |
fea72cc0 | 2090 | q = set_put(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2091 | if (q < 0) |
2092 | return q; | |
2093 | ||
2094 | return r; | |
87f0e418 LP |
2095 | } |
2096 | ||
2097 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2098 | assert(u); | |
2099 | assert(pid >= 1); | |
2100 | ||
fea72cc0 LP |
2101 | (void) hashmap_remove_value(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
2102 | (void) hashmap_remove_value(u->manager->watch_pids2, PID_TO_PTR(pid), u); | |
2103 | (void) set_remove(u->pids, PID_TO_PTR(pid)); | |
a911bb9a LP |
2104 | } |
2105 | ||
bd44e61b LP |
2106 | void unit_unwatch_all_pids(Unit *u) { |
2107 | assert(u); | |
2108 | ||
2109 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2110 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2111 | |
efdb0237 | 2112 | u->pids = set_free(u->pids); |
a911bb9a LP |
2113 | } |
2114 | ||
2115 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2116 | Iterator i; | |
2117 | void *e; | |
2118 | ||
2119 | assert(u); | |
2120 | ||
2121 | /* Cleans dead PIDs from our list */ | |
2122 | ||
2123 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2124 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2125 | |
2126 | if (pid == except1 || pid == except2) | |
2127 | continue; | |
2128 | ||
9f5650ae | 2129 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2130 | unit_unwatch_pid(u, pid); |
a911bb9a | 2131 | } |
87f0e418 LP |
2132 | } |
2133 | ||
87f0e418 LP |
2134 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2135 | assert(u); | |
2136 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2137 | ||
2138 | switch (j) { | |
2139 | ||
2140 | case JOB_VERIFY_ACTIVE: | |
2141 | case JOB_START: | |
57339f47 | 2142 | case JOB_STOP: |
e0209d83 | 2143 | case JOB_NOP: |
87f0e418 LP |
2144 | return true; |
2145 | ||
87f0e418 LP |
2146 | case JOB_RESTART: |
2147 | case JOB_TRY_RESTART: | |
2148 | return unit_can_start(u); | |
2149 | ||
2150 | case JOB_RELOAD: | |
3282591d | 2151 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2152 | return unit_can_reload(u); |
2153 | ||
2154 | case JOB_RELOAD_OR_START: | |
2155 | return unit_can_reload(u) && unit_can_start(u); | |
2156 | ||
2157 | default: | |
2158 | assert_not_reached("Invalid job type"); | |
2159 | } | |
2160 | } | |
2161 | ||
f2341e0a LP |
2162 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2163 | assert(u); | |
d1fab3fe | 2164 | |
f2341e0a LP |
2165 | /* Only warn about some unit types */ |
2166 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2167 | return; | |
3f3cc397 | 2168 | |
f2341e0a LP |
2169 | if (streq_ptr(u->id, other)) |
2170 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2171 | else | |
2172 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2173 | } |
2174 | ||
701cc384 | 2175 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2176 | |
2177 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2178 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2179 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2180 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2181 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2182 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2183 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2184 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2185 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2186 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2187 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2188 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2189 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2190 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2191 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2192 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2193 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2194 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2195 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2196 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2197 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2198 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2199 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2200 | }; |
701cc384 | 2201 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2202 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2203 | |
2204 | assert(u); | |
2205 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2206 | assert(other); |
2207 | ||
9f151f29 LP |
2208 | u = unit_follow_merge(u); |
2209 | other = unit_follow_merge(other); | |
2210 | ||
87f0e418 LP |
2211 | /* We won't allow dependencies on ourselves. We will not |
2212 | * consider them an error however. */ | |
d1fab3fe | 2213 | if (u == other) { |
f2341e0a | 2214 | maybe_warn_about_dependency(orig_u, orig_other->id, d); |
87f0e418 | 2215 | return 0; |
d1fab3fe | 2216 | } |
87f0e418 | 2217 | |
d5099efc | 2218 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2219 | if (r < 0) |
87f0e418 LP |
2220 | return r; |
2221 | ||
613b411c | 2222 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2223 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2224 | if (r < 0) |
2225 | return r; | |
2226 | } | |
2227 | ||
2228 | if (add_reference) { | |
d5099efc | 2229 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2230 | if (r < 0) |
5de9682c LP |
2231 | return r; |
2232 | ||
d5099efc | 2233 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2234 | if (r < 0) |
701cc384 | 2235 | return r; |
613b411c | 2236 | } |
87f0e418 | 2237 | |
613b411c LP |
2238 | q = set_put(u->dependencies[d], other); |
2239 | if (q < 0) | |
701cc384 | 2240 | return q; |
87f0e418 | 2241 | |
613b411c LP |
2242 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2243 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2244 | if (v < 0) { | |
5de9682c LP |
2245 | r = v; |
2246 | goto fail; | |
2247 | } | |
613b411c | 2248 | } |
701cc384 LP |
2249 | |
2250 | if (add_reference) { | |
613b411c LP |
2251 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2252 | if (w < 0) { | |
701cc384 LP |
2253 | r = w; |
2254 | goto fail; | |
2255 | } | |
2256 | ||
613b411c LP |
2257 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2258 | if (r < 0) | |
701cc384 | 2259 | goto fail; |
87f0e418 LP |
2260 | } |
2261 | ||
c1e1601e | 2262 | unit_add_to_dbus_queue(u); |
87f0e418 | 2263 | return 0; |
701cc384 LP |
2264 | |
2265 | fail: | |
2266 | if (q > 0) | |
ac155bb8 | 2267 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2268 | |
2269 | if (v > 0) | |
ac155bb8 | 2270 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2271 | |
2272 | if (w > 0) | |
ac155bb8 | 2273 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2274 | |
2275 | return r; | |
87f0e418 | 2276 | } |
0301abf4 | 2277 | |
2c966c03 LP |
2278 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2279 | int r; | |
2280 | ||
2281 | assert(u); | |
2282 | ||
3f3cc397 LP |
2283 | r = unit_add_dependency(u, d, other, add_reference); |
2284 | if (r < 0) | |
2c966c03 LP |
2285 | return r; |
2286 | ||
7410616c | 2287 | return unit_add_dependency(u, e, other, add_reference); |
2c966c03 LP |
2288 | } |
2289 | ||
7410616c LP |
2290 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2291 | int r; | |
9e2f7c11 LP |
2292 | |
2293 | assert(u); | |
2294 | assert(name || path); | |
7410616c LP |
2295 | assert(buf); |
2296 | assert(ret); | |
9e2f7c11 LP |
2297 | |
2298 | if (!name) | |
2b6bf07d | 2299 | name = basename(path); |
9e2f7c11 | 2300 | |
7410616c LP |
2301 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2302 | *buf = NULL; | |
2303 | *ret = name; | |
2304 | return 0; | |
9e2f7c11 LP |
2305 | } |
2306 | ||
ac155bb8 | 2307 | if (u->instance) |
7410616c | 2308 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2309 | else { |
ae018d9b | 2310 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2311 | |
7410616c LP |
2312 | r = unit_name_to_prefix(u->id, &i); |
2313 | if (r < 0) | |
2314 | return r; | |
9e2f7c11 | 2315 | |
7410616c | 2316 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2317 | } |
7410616c LP |
2318 | if (r < 0) |
2319 | return r; | |
9e2f7c11 | 2320 | |
7410616c LP |
2321 | *ret = *buf; |
2322 | return 0; | |
9e2f7c11 LP |
2323 | } |
2324 | ||
701cc384 | 2325 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2326 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2327 | Unit *other; |
2328 | int r; | |
2329 | ||
9e2f7c11 LP |
2330 | assert(u); |
2331 | assert(name || path); | |
09b6b09f | 2332 | |
7410616c LP |
2333 | r = resolve_template(u, name, path, &buf, &name); |
2334 | if (r < 0) | |
2335 | return r; | |
09b6b09f | 2336 | |
8afbb8e1 LP |
2337 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2338 | if (r < 0) | |
2339 | return r; | |
9e2f7c11 | 2340 | |
8afbb8e1 | 2341 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2342 | } |
2343 | ||
2c966c03 | 2344 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2345 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2346 | Unit *other; |
2347 | int r; | |
2c966c03 LP |
2348 | |
2349 | assert(u); | |
2350 | assert(name || path); | |
2351 | ||
7410616c LP |
2352 | r = resolve_template(u, name, path, &buf, &name); |
2353 | if (r < 0) | |
2354 | return r; | |
2c966c03 | 2355 | |
3f3cc397 LP |
2356 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2357 | if (r < 0) | |
68eda4bd | 2358 | return r; |
2c966c03 | 2359 | |
3f3cc397 | 2360 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2361 | } |
2362 | ||
0301abf4 | 2363 | int set_unit_path(const char *p) { |
0301abf4 | 2364 | /* This is mostly for debug purposes */ |
cbe46ead | 2365 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2366 | return -errno; |
0301abf4 LP |
2367 | |
2368 | return 0; | |
2369 | } | |
88066b3a | 2370 | |
ea430986 | 2371 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2372 | assert(u); |
2373 | ||
ac155bb8 | 2374 | if (!u->id) |
04ade7d2 LP |
2375 | return NULL; |
2376 | ||
48899192 | 2377 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2378 | } |
2379 | ||
d79200e2 LP |
2380 | int unit_set_slice(Unit *u, Unit *slice) { |
2381 | assert(u); | |
2382 | assert(slice); | |
2383 | ||
2384 | /* Sets the unit slice if it has not been set before. Is extra | |
2385 | * careful, to only allow this for units that actually have a | |
2386 | * cgroup context. Also, we don't allow to set this for slices | |
2387 | * (since the parent slice is derived from the name). Make | |
2388 | * sure the unit we set is actually a slice. */ | |
2389 | ||
2390 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2391 | return -EOPNOTSUPP; | |
2392 | ||
2393 | if (u->type == UNIT_SLICE) | |
2394 | return -EINVAL; | |
2395 | ||
102ef982 LP |
2396 | if (unit_active_state(u) != UNIT_INACTIVE) |
2397 | return -EBUSY; | |
2398 | ||
d79200e2 LP |
2399 | if (slice->type != UNIT_SLICE) |
2400 | return -EINVAL; | |
2401 | ||
efdb0237 LP |
2402 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2403 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2404 | return -EPERM; | |
2405 | ||
d79200e2 LP |
2406 | if (UNIT_DEREF(u->slice) == slice) |
2407 | return 0; | |
2408 | ||
99e66921 TH |
2409 | /* Disallow slice changes if @u is already bound to cgroups */ |
2410 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
2411 | return -EBUSY; |
2412 | ||
99e66921 | 2413 | unit_ref_unset(&u->slice); |
d79200e2 LP |
2414 | unit_ref_set(&u->slice, slice); |
2415 | return 1; | |
2416 | } | |
2417 | ||
2418 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2419 | _cleanup_free_ char *b = NULL; |
2420 | const char *slice_name; | |
a016b922 LP |
2421 | Unit *slice; |
2422 | int r; | |
2423 | ||
2424 | assert(u); | |
2425 | ||
9444b1f2 | 2426 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2427 | return 0; |
2428 | ||
a8833944 LP |
2429 | if (u->instance) { |
2430 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2431 | |
a8833944 LP |
2432 | /* Implicitly place all instantiated units in their |
2433 | * own per-template slice */ | |
2434 | ||
7410616c LP |
2435 | r = unit_name_to_prefix(u->id, &prefix); |
2436 | if (r < 0) | |
2437 | return r; | |
a8833944 LP |
2438 | |
2439 | /* The prefix is already escaped, but it might include | |
2440 | * "-" which has a special meaning for slice units, | |
2441 | * hence escape it here extra. */ | |
7410616c | 2442 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2443 | if (!escaped) |
2444 | return -ENOMEM; | |
2445 | ||
463d0d15 | 2446 | if (MANAGER_IS_SYSTEM(u->manager)) |
a8833944 LP |
2447 | b = strjoin("system-", escaped, ".slice", NULL); |
2448 | else | |
2449 | b = strappend(escaped, ".slice"); | |
2450 | if (!b) | |
2451 | return -ENOMEM; | |
2452 | ||
2453 | slice_name = b; | |
2454 | } else | |
2455 | slice_name = | |
463d0d15 | 2456 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2457 | ? SPECIAL_SYSTEM_SLICE |
2458 | : SPECIAL_ROOT_SLICE; | |
2459 | ||
2460 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2461 | if (r < 0) |
2462 | return r; | |
2463 | ||
d79200e2 | 2464 | return unit_set_slice(u, slice); |
a016b922 LP |
2465 | } |
2466 | ||
9444b1f2 LP |
2467 | const char *unit_slice_name(Unit *u) { |
2468 | assert(u); | |
2469 | ||
2470 | if (!UNIT_ISSET(u->slice)) | |
2471 | return NULL; | |
2472 | ||
2473 | return UNIT_DEREF(u->slice)->id; | |
2474 | } | |
2475 | ||
f6ff8c29 | 2476 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2477 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2478 | int r; |
2479 | ||
2480 | assert(u); | |
2481 | assert(type); | |
2482 | assert(_found); | |
2483 | ||
7410616c LP |
2484 | r = unit_name_change_suffix(u->id, type, &t); |
2485 | if (r < 0) | |
2486 | return r; | |
2487 | if (unit_has_name(u, t)) | |
2488 | return -EINVAL; | |
f6ff8c29 | 2489 | |
ac155bb8 | 2490 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2491 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2492 | return r; |
2493 | } | |
2494 | ||
bbc29086 DM |
2495 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
2496 | const char *name, *old_owner, *new_owner; | |
2497 | Unit *u = userdata; | |
2498 | int r; | |
2499 | ||
2500 | assert(message); | |
2501 | assert(u); | |
2502 | ||
2503 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
2504 | if (r < 0) { | |
2505 | bus_log_parse_error(r); | |
2506 | return 0; | |
2507 | } | |
2508 | ||
2509 | if (UNIT_VTABLE(u)->bus_name_owner_change) | |
2510 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
2511 | ||
2512 | return 0; | |
2513 | } | |
2514 | ||
9806e87d LP |
2515 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
2516 | const char *match; | |
bbc29086 | 2517 | |
9806e87d LP |
2518 | assert(u); |
2519 | assert(bus); | |
2520 | assert(name); | |
bbc29086 DM |
2521 | |
2522 | if (u->match_bus_slot) | |
2523 | return -EBUSY; | |
2524 | ||
9806e87d | 2525 | match = strjoina("type='signal'," |
81d62103 ZJS |
2526 | "sender='org.freedesktop.DBus'," |
2527 | "path='/org/freedesktop/DBus'," | |
2528 | "interface='org.freedesktop.DBus'," | |
2529 | "member='NameOwnerChanged'," | |
2530 | "arg0='", name, "'"); | |
bbc29086 DM |
2531 | |
2532 | return sd_bus_add_match(bus, &u->match_bus_slot, match, signal_name_owner_changed, u); | |
2533 | } | |
2534 | ||
05e343b7 | 2535 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
2536 | int r; |
2537 | ||
05e343b7 LP |
2538 | assert(u); |
2539 | assert(name); | |
2540 | ||
2541 | /* Watch a specific name on the bus. We only support one unit | |
2542 | * watching each name for now. */ | |
2543 | ||
bbc29086 DM |
2544 | if (u->manager->api_bus) { |
2545 | /* If the bus is already available, install the match directly. | |
2546 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 2547 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 2548 | if (r < 0) |
8ea823b6 | 2549 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
2550 | } |
2551 | ||
2552 | r = hashmap_put(u->manager->watch_bus, name, u); | |
2553 | if (r < 0) { | |
2554 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
2555 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
2556 | } | |
2557 | ||
2558 | return 0; | |
05e343b7 LP |
2559 | } |
2560 | ||
2561 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2562 | assert(u); | |
2563 | assert(name); | |
2564 | ||
ac155bb8 | 2565 | hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 2566 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
2567 | } |
2568 | ||
a16e1123 LP |
2569 | bool unit_can_serialize(Unit *u) { |
2570 | assert(u); | |
2571 | ||
2572 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2573 | } | |
2574 | ||
6b78f9b4 | 2575 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2576 | int r; |
2577 | ||
2578 | assert(u); | |
2579 | assert(f); | |
2580 | assert(fds); | |
2581 | ||
9bdb98c5 LP |
2582 | if (unit_can_serialize(u)) { |
2583 | ExecRuntime *rt; | |
a16e1123 | 2584 | |
9bdb98c5 | 2585 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2586 | if (r < 0) |
2587 | return r; | |
9bdb98c5 LP |
2588 | |
2589 | rt = unit_get_exec_runtime(u); | |
2590 | if (rt) { | |
f2341e0a | 2591 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
2592 | if (r < 0) |
2593 | return r; | |
2594 | } | |
e0209d83 MS |
2595 | } |
2596 | ||
a483fb59 LP |
2597 | dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); |
2598 | ||
ac155bb8 MS |
2599 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2600 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2601 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2602 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 2603 | |
ac155bb8 | 2604 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
59fccdc5 | 2605 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2606 | |
ac155bb8 MS |
2607 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2608 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2609 | |
59fccdc5 LP |
2610 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2611 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2612 | ||
c2756a68 | 2613 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
66ebf6c0 | 2614 | unit_serialize_item_format(u, f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
c2756a68 LP |
2615 | |
2616 | if (u->cgroup_path) | |
2617 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 2618 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
c2756a68 | 2619 | |
00d9ef85 LP |
2620 | if (uid_is_valid(u->ref_uid)) |
2621 | unit_serialize_item_format(u, f, "ref-uid", UID_FMT, u->ref_uid); | |
2622 | if (gid_is_valid(u->ref_gid)) | |
2623 | unit_serialize_item_format(u, f, "ref-gid", GID_FMT, u->ref_gid); | |
2624 | ||
613b411c LP |
2625 | if (serialize_jobs) { |
2626 | if (u->job) { | |
2627 | fprintf(f, "job\n"); | |
2628 | job_serialize(u->job, f, fds); | |
2629 | } | |
2630 | ||
2631 | if (u->nop_job) { | |
2632 | fprintf(f, "job\n"); | |
2633 | job_serialize(u->nop_job, f, fds); | |
2634 | } | |
2635 | } | |
2636 | ||
a16e1123 LP |
2637 | /* End marker */ |
2638 | fputc('\n', f); | |
2639 | return 0; | |
2640 | } | |
2641 | ||
a34ceba6 LP |
2642 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
2643 | assert(u); | |
2644 | assert(f); | |
2645 | assert(key); | |
2646 | ||
2647 | if (!value) | |
2648 | return 0; | |
2649 | ||
2650 | fputs(key, f); | |
2651 | fputc('=', f); | |
2652 | fputs(value, f); | |
2653 | fputc('\n', f); | |
2654 | ||
2655 | return 1; | |
2656 | } | |
2657 | ||
2658 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
2659 | _cleanup_free_ char *c = NULL; | |
2660 | ||
2661 | assert(u); | |
2662 | assert(f); | |
2663 | assert(key); | |
2664 | ||
2665 | if (!value) | |
2666 | return 0; | |
2667 | ||
2668 | c = cescape(value); | |
2669 | if (!c) | |
2670 | return -ENOMEM; | |
2671 | ||
2672 | fputs(key, f); | |
2673 | fputc('=', f); | |
2674 | fputs(c, f); | |
2675 | fputc('\n', f); | |
2676 | ||
2677 | return 1; | |
2678 | } | |
2679 | ||
2680 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
2681 | int copy; | |
2682 | ||
2683 | assert(u); | |
2684 | assert(f); | |
2685 | assert(key); | |
2686 | ||
2687 | if (fd < 0) | |
2688 | return 0; | |
2689 | ||
2690 | copy = fdset_put_dup(fds, fd); | |
2691 | if (copy < 0) | |
2692 | return copy; | |
2693 | ||
2694 | fprintf(f, "%s=%i\n", key, copy); | |
2695 | return 1; | |
2696 | } | |
2697 | ||
a16e1123 LP |
2698 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
2699 | va_list ap; | |
2700 | ||
2701 | assert(u); | |
2702 | assert(f); | |
2703 | assert(key); | |
2704 | assert(format); | |
2705 | ||
2706 | fputs(key, f); | |
2707 | fputc('=', f); | |
2708 | ||
2709 | va_start(ap, format); | |
2710 | vfprintf(f, format, ap); | |
2711 | va_end(ap); | |
2712 | ||
2713 | fputc('\n', f); | |
2714 | } | |
2715 | ||
a16e1123 | 2716 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 2717 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2718 | size_t offset; |
a16e1123 LP |
2719 | int r; |
2720 | ||
2721 | assert(u); | |
2722 | assert(f); | |
2723 | assert(fds); | |
2724 | ||
613b411c LP |
2725 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2726 | if (offset > 0) | |
2727 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2728 | ||
a16e1123 | 2729 | for (;;) { |
20c03b7b | 2730 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2731 | size_t k; |
2732 | ||
2733 | if (!fgets(line, sizeof(line), f)) { | |
2734 | if (feof(f)) | |
2735 | return 0; | |
2736 | return -errno; | |
2737 | } | |
2738 | ||
10f8e83c | 2739 | char_array_0(line); |
a16e1123 LP |
2740 | l = strstrip(line); |
2741 | ||
2742 | /* End marker */ | |
e911de99 | 2743 | if (isempty(l)) |
a483fb59 | 2744 | break; |
a16e1123 LP |
2745 | |
2746 | k = strcspn(l, "="); | |
2747 | ||
2748 | if (l[k] == '=') { | |
2749 | l[k] = 0; | |
2750 | v = l+k+1; | |
2751 | } else | |
2752 | v = l+k; | |
2753 | ||
cca098b0 | 2754 | if (streq(l, "job")) { |
39a18c60 MS |
2755 | if (v[0] == '\0') { |
2756 | /* new-style serialized job */ | |
9c3349e2 LP |
2757 | Job *j; |
2758 | ||
2759 | j = job_new_raw(u); | |
39a18c60 | 2760 | if (!j) |
e911de99 | 2761 | return log_oom(); |
39a18c60 MS |
2762 | |
2763 | r = job_deserialize(j, f, fds); | |
2764 | if (r < 0) { | |
2765 | job_free(j); | |
2766 | return r; | |
2767 | } | |
cca098b0 | 2768 | |
39a18c60 MS |
2769 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2770 | if (r < 0) { | |
2771 | job_free(j); | |
2772 | return r; | |
2773 | } | |
e0209d83 MS |
2774 | |
2775 | r = job_install_deserialized(j); | |
2776 | if (r < 0) { | |
2777 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2778 | job_free(j); | |
2779 | return r; | |
2780 | } | |
ed10fa8c LP |
2781 | } else /* legacy for pre-44 */ |
2782 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 2783 | continue; |
a483fb59 LP |
2784 | } else if (streq(l, "state-change-timestamp")) { |
2785 | dual_timestamp_deserialize(v, &u->state_change_timestamp); | |
2786 | continue; | |
8aaf019b | 2787 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2788 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2789 | continue; |
2790 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 2791 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
2792 | continue; |
2793 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 2794 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
2795 | continue; |
2796 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 2797 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 2798 | continue; |
2791a8f8 | 2799 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 2800 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 2801 | continue; |
59fccdc5 LP |
2802 | } else if (streq(l, "assert-timestamp")) { |
2803 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
2804 | continue; | |
2791a8f8 | 2805 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 2806 | |
e911de99 LP |
2807 | r = parse_boolean(v); |
2808 | if (r < 0) | |
f2341e0a | 2809 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 2810 | else |
e911de99 | 2811 | u->condition_result = r; |
efbac6d2 LP |
2812 | |
2813 | continue; | |
c2756a68 | 2814 | |
59fccdc5 | 2815 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 2816 | |
e911de99 LP |
2817 | r = parse_boolean(v); |
2818 | if (r < 0) | |
f2341e0a | 2819 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 2820 | else |
e911de99 | 2821 | u->assert_result = r; |
59fccdc5 LP |
2822 | |
2823 | continue; | |
2824 | ||
c2756a68 | 2825 | } else if (streq(l, "transient")) { |
c2756a68 | 2826 | |
e911de99 LP |
2827 | r = parse_boolean(v); |
2828 | if (r < 0) | |
f2341e0a | 2829 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 2830 | else |
e911de99 | 2831 | u->transient = r; |
c2756a68 LP |
2832 | |
2833 | continue; | |
e911de99 | 2834 | |
66ebf6c0 | 2835 | } else if (streq(l, "cpu-usage-base") || streq(l, "cpuacct-usage-base")) { |
5ad096b3 | 2836 | |
66ebf6c0 | 2837 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 2838 | if (r < 0) |
f2341e0a | 2839 | log_unit_debug(u, "Failed to parse CPU usage %s, ignoring.", v); |
5ad096b3 | 2840 | |
0f908397 | 2841 | continue; |
4e595329 | 2842 | |
e911de99 | 2843 | } else if (streq(l, "cgroup")) { |
72673e86 | 2844 | |
e911de99 LP |
2845 | r = unit_set_cgroup_path(u, v); |
2846 | if (r < 0) | |
f2341e0a | 2847 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 2848 | |
efdb0237 LP |
2849 | (void) unit_watch_cgroup(u); |
2850 | ||
de1d4f9b WF |
2851 | continue; |
2852 | } else if (streq(l, "cgroup-realized")) { | |
2853 | int b; | |
2854 | ||
2855 | b = parse_boolean(v); | |
2856 | if (b < 0) | |
2857 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
2858 | else | |
2859 | u->cgroup_realized = b; | |
2860 | ||
c2756a68 | 2861 | continue; |
00d9ef85 LP |
2862 | |
2863 | } else if (streq(l, "ref-uid")) { | |
2864 | uid_t uid; | |
2865 | ||
2866 | r = parse_uid(v, &uid); | |
2867 | if (r < 0) | |
2868 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
2869 | else | |
2870 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
2871 | ||
2872 | continue; | |
2873 | ||
2874 | } else if (streq(l, "ref-gid")) { | |
2875 | gid_t gid; | |
2876 | ||
2877 | r = parse_gid(v, &gid); | |
2878 | if (r < 0) | |
2879 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
2880 | else | |
2881 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
2882 | ||
2883 | continue; | |
8aaf019b | 2884 | } |
cca098b0 | 2885 | |
9bdb98c5 LP |
2886 | if (unit_can_serialize(u)) { |
2887 | if (rt) { | |
f2341e0a | 2888 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 2889 | if (r < 0) { |
f2341e0a | 2890 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
2891 | continue; |
2892 | } | |
2893 | ||
2894 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
2895 | if (r > 0) |
2896 | continue; | |
2897 | } | |
2898 | ||
2899 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 2900 | if (r < 0) |
f2341e0a | 2901 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 2902 | } |
a16e1123 | 2903 | } |
a483fb59 LP |
2904 | |
2905 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
2906 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 2907 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
2908 | |
2909 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
2910 | dual_timestamp_get(&u->state_change_timestamp); | |
2911 | ||
2912 | return 0; | |
a16e1123 LP |
2913 | } |
2914 | ||
9d06297e | 2915 | int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency dep) { |
6e2ef85b | 2916 | Unit *device; |
68eda4bd | 2917 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
2918 | int r; |
2919 | ||
2920 | assert(u); | |
2921 | ||
6e2ef85b | 2922 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
2923 | if (isempty(what)) |
2924 | return 0; | |
6e2ef85b | 2925 | |
8407a5d0 | 2926 | if (!is_device_path(what)) |
6e2ef85b LP |
2927 | return 0; |
2928 | ||
47bc12e1 LP |
2929 | /* When device units aren't supported (such as in a |
2930 | * container), don't create dependencies on them. */ | |
1c2e9646 | 2931 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
2932 | return 0; |
2933 | ||
7410616c LP |
2934 | r = unit_name_from_path(what, ".device", &e); |
2935 | if (r < 0) | |
2936 | return r; | |
6e2ef85b | 2937 | |
ac155bb8 | 2938 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
2939 | if (r < 0) |
2940 | return r; | |
2941 | ||
9d06297e | 2942 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 2943 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
9d06297e | 2944 | device, true); |
faa368e3 | 2945 | if (r < 0) |
6e2ef85b LP |
2946 | return r; |
2947 | ||
faa368e3 LP |
2948 | if (wants) { |
2949 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
2950 | if (r < 0) | |
6e2ef85b | 2951 | return r; |
faa368e3 | 2952 | } |
6e2ef85b LP |
2953 | |
2954 | return 0; | |
2955 | } | |
a16e1123 | 2956 | |
be847e82 | 2957 | int unit_coldplug(Unit *u) { |
5a6158b6 | 2958 | int r = 0, q = 0; |
cca098b0 LP |
2959 | |
2960 | assert(u); | |
2961 | ||
f78f265f LP |
2962 | /* Make sure we don't enter a loop, when coldplugging |
2963 | * recursively. */ | |
2964 | if (u->coldplugged) | |
2965 | return 0; | |
2966 | ||
2967 | u->coldplugged = true; | |
2968 | ||
5a6158b6 | 2969 | if (UNIT_VTABLE(u)->coldplug) |
f78f265f | 2970 | r = UNIT_VTABLE(u)->coldplug(u); |
cca098b0 | 2971 | |
5a6158b6 LP |
2972 | if (u->job) |
2973 | q = job_coldplug(u->job); | |
2974 | ||
2975 | if (r < 0) | |
2976 | return r; | |
2977 | if (q < 0) | |
2978 | return q; | |
cca098b0 LP |
2979 | |
2980 | return 0; | |
2981 | } | |
2982 | ||
87ec20ef | 2983 | static bool fragment_mtime_newer(const char *path, usec_t mtime) { |
21b95806 ZJS |
2984 | struct stat st; |
2985 | ||
2986 | if (!path) | |
2987 | return false; | |
2988 | ||
2989 | if (stat(path, &st) < 0) | |
2990 | /* What, cannot access this anymore? */ | |
2991 | return true; | |
2992 | ||
3a8db9fe ZJS |
2993 | if (mtime > 0) |
2994 | /* For non-empty files check the mtime */ | |
87ec20ef | 2995 | return timespec_load(&st.st_mtim) > mtime; |
3a8db9fe ZJS |
2996 | else if (!null_or_empty(&st)) |
2997 | /* For masked files check if they are still so */ | |
21b95806 ZJS |
2998 | return true; |
2999 | ||
3000 | return false; | |
3001 | } | |
3002 | ||
45fb0699 | 3003 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3004 | _cleanup_strv_free_ char **t = NULL; |
3005 | char **path; | |
1b64d026 | 3006 | |
45fb0699 LP |
3007 | assert(u); |
3008 | ||
ab932a62 | 3009 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime)) |
21b95806 | 3010 | return true; |
5f4b19f4 | 3011 | |
ab932a62 LP |
3012 | if (fragment_mtime_newer(u->source_path, u->source_mtime)) |
3013 | return true; | |
ae7a7182 | 3014 | |
ab932a62 LP |
3015 | (void) unit_find_dropin_paths(u, &t); |
3016 | if (!strv_equal(u->dropin_paths, t)) | |
3017 | return true; | |
6d10d308 | 3018 | |
ab932a62 LP |
3019 | STRV_FOREACH(path, u->dropin_paths) |
3020 | if (fragment_mtime_newer(*path, u->dropin_mtime)) | |
3021 | return true; | |
21b95806 | 3022 | |
ab932a62 | 3023 | return false; |
45fb0699 LP |
3024 | } |
3025 | ||
fdf20a31 | 3026 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3027 | assert(u); |
3028 | ||
fdf20a31 MM |
3029 | if (UNIT_VTABLE(u)->reset_failed) |
3030 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3031 | |
3032 | RATELIMIT_RESET(u->start_limit); | |
3033 | u->start_limit_hit = false; | |
5632e374 LP |
3034 | } |
3035 | ||
a7f241db LP |
3036 | Unit *unit_following(Unit *u) { |
3037 | assert(u); | |
3038 | ||
3039 | if (UNIT_VTABLE(u)->following) | |
3040 | return UNIT_VTABLE(u)->following(u); | |
3041 | ||
3042 | return NULL; | |
3043 | } | |
3044 | ||
31afa0a4 | 3045 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3046 | assert(u); |
3047 | ||
31afa0a4 LP |
3048 | /* This call does check the current state of the unit. It's |
3049 | * hence useful to be called from state change calls of the | |
3050 | * unit itself, where the state isn't updated yet. This is | |
3051 | * different from unit_inactive_or_pending() which checks both | |
3052 | * the current state and for a queued job. */ | |
18ffdfda | 3053 | |
31afa0a4 LP |
3054 | return u->job && u->job->type == JOB_STOP; |
3055 | } | |
3056 | ||
3057 | bool unit_inactive_or_pending(Unit *u) { | |
3058 | assert(u); | |
3059 | ||
3060 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3061 | |
d956ac29 LP |
3062 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3063 | return true; | |
3064 | ||
31afa0a4 | 3065 | if (unit_stop_pending(u)) |
18ffdfda LP |
3066 | return true; |
3067 | ||
3068 | return false; | |
3069 | } | |
3070 | ||
31afa0a4 | 3071 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3072 | assert(u); |
3073 | ||
f60c2665 | 3074 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3075 | |
3076 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3077 | return true; | |
3078 | ||
ac155bb8 MS |
3079 | if (u->job && |
3080 | (u->job->type == JOB_START || | |
3081 | u->job->type == JOB_RELOAD_OR_START || | |
3082 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
3083 | return true; |
3084 | ||
3085 | return false; | |
3086 | } | |
3087 | ||
718db961 | 3088 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3089 | assert(u); |
3090 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3091 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3092 | |
8a0867d6 | 3093 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3094 | return -EOPNOTSUPP; |
8a0867d6 | 3095 | |
c74f17d9 | 3096 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3097 | } |
3098 | ||
82659fd7 LP |
3099 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3100 | Set *pid_set; | |
3101 | int r; | |
3102 | ||
d5099efc | 3103 | pid_set = set_new(NULL); |
82659fd7 LP |
3104 | if (!pid_set) |
3105 | return NULL; | |
3106 | ||
3107 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3108 | if (main_pid > 0) { | |
fea72cc0 | 3109 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 LP |
3110 | if (r < 0) |
3111 | goto fail; | |
3112 | } | |
3113 | ||
3114 | if (control_pid > 0) { | |
fea72cc0 | 3115 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 LP |
3116 | if (r < 0) |
3117 | goto fail; | |
3118 | } | |
3119 | ||
3120 | return pid_set; | |
3121 | ||
3122 | fail: | |
3123 | set_free(pid_set); | |
3124 | return NULL; | |
3125 | } | |
3126 | ||
d91c34f2 LP |
3127 | int unit_kill_common( |
3128 | Unit *u, | |
3129 | KillWho who, | |
3130 | int signo, | |
3131 | pid_t main_pid, | |
3132 | pid_t control_pid, | |
718db961 | 3133 | sd_bus_error *error) { |
d91c34f2 | 3134 | |
814cc562 | 3135 | int r = 0; |
ac5e3a50 | 3136 | bool killed = false; |
814cc562 | 3137 | |
ac5e3a50 | 3138 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3139 | if (main_pid < 0) |
7358dc02 | 3140 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3141 | else if (main_pid == 0) |
7358dc02 | 3142 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3143 | } |
3144 | ||
ac5e3a50 | 3145 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3146 | if (control_pid < 0) |
7358dc02 | 3147 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3148 | else if (control_pid == 0) |
7358dc02 | 3149 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3150 | } |
3151 | ||
ac5e3a50 JS |
3152 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3153 | if (control_pid > 0) { | |
814cc562 MS |
3154 | if (kill(control_pid, signo) < 0) |
3155 | r = -errno; | |
ac5e3a50 JS |
3156 | else |
3157 | killed = true; | |
3158 | } | |
814cc562 | 3159 | |
ac5e3a50 JS |
3160 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3161 | if (main_pid > 0) { | |
814cc562 MS |
3162 | if (kill(main_pid, signo) < 0) |
3163 | r = -errno; | |
ac5e3a50 JS |
3164 | else |
3165 | killed = true; | |
3166 | } | |
814cc562 | 3167 | |
ac5e3a50 | 3168 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3169 | _cleanup_set_free_ Set *pid_set = NULL; |
3170 | int q; | |
3171 | ||
82659fd7 LP |
3172 | /* Exclude the main/control pids from being killed via the cgroup */ |
3173 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3174 | if (!pid_set) |
3175 | return -ENOMEM; | |
3176 | ||
1d98fef1 | 3177 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
814cc562 MS |
3178 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3179 | r = q; | |
ac5e3a50 JS |
3180 | else |
3181 | killed = true; | |
814cc562 MS |
3182 | } |
3183 | ||
201f0c91 | 3184 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3185 | return -ESRCH; |
3186 | ||
814cc562 MS |
3187 | return r; |
3188 | } | |
3189 | ||
6210e7fc LP |
3190 | int unit_following_set(Unit *u, Set **s) { |
3191 | assert(u); | |
3192 | assert(s); | |
3193 | ||
3194 | if (UNIT_VTABLE(u)->following_set) | |
3195 | return UNIT_VTABLE(u)->following_set(u, s); | |
3196 | ||
3197 | *s = NULL; | |
3198 | return 0; | |
3199 | } | |
3200 | ||
a4375746 | 3201 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3202 | int r; |
3203 | ||
a4375746 LP |
3204 | assert(u); |
3205 | ||
0ec0deaa LP |
3206 | if (u->unit_file_state < 0 && u->fragment_path) { |
3207 | r = unit_file_get_state( | |
463d0d15 | 3208 | u->manager->unit_file_scope, |
0ec0deaa LP |
3209 | NULL, |
3210 | basename(u->fragment_path), | |
3211 | &u->unit_file_state); | |
3212 | if (r < 0) | |
3213 | u->unit_file_state = UNIT_FILE_BAD; | |
3214 | } | |
a4375746 | 3215 | |
ac155bb8 | 3216 | return u->unit_file_state; |
a4375746 LP |
3217 | } |
3218 | ||
d2dc52db LP |
3219 | int unit_get_unit_file_preset(Unit *u) { |
3220 | assert(u); | |
3221 | ||
3222 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3223 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3224 | u->manager->unit_file_scope, |
0ec0deaa LP |
3225 | NULL, |
3226 | basename(u->fragment_path)); | |
d2dc52db LP |
3227 | |
3228 | return u->unit_file_preset; | |
3229 | } | |
3230 | ||
57020a3a LP |
3231 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3232 | assert(ref); | |
3233 | assert(u); | |
3234 | ||
3235 | if (ref->unit) | |
3236 | unit_ref_unset(ref); | |
3237 | ||
3238 | ref->unit = u; | |
71fda00f | 3239 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3240 | return u; |
3241 | } | |
3242 | ||
3243 | void unit_ref_unset(UnitRef *ref) { | |
3244 | assert(ref); | |
3245 | ||
3246 | if (!ref->unit) | |
3247 | return; | |
3248 | ||
b75102e5 LP |
3249 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3250 | * be unreferenced now. */ | |
3251 | unit_add_to_gc_queue(ref->unit); | |
3252 | ||
71fda00f | 3253 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3254 | ref->unit = NULL; |
3255 | } | |
3256 | ||
29206d46 LP |
3257 | static int user_from_unit_name(Unit *u, char **ret) { |
3258 | ||
3259 | static const uint8_t hash_key[] = { | |
3260 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
3261 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
3262 | }; | |
3263 | ||
3264 | _cleanup_free_ char *n = NULL; | |
3265 | int r; | |
3266 | ||
3267 | r = unit_name_to_prefix(u->id, &n); | |
3268 | if (r < 0) | |
3269 | return r; | |
3270 | ||
3271 | if (valid_user_group_name(n)) { | |
3272 | *ret = n; | |
3273 | n = NULL; | |
3274 | return 0; | |
3275 | } | |
3276 | ||
3277 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
3278 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
3279 | return -ENOMEM; | |
3280 | ||
3281 | return 0; | |
3282 | } | |
3283 | ||
598459ce LP |
3284 | int unit_patch_contexts(Unit *u) { |
3285 | CGroupContext *cc; | |
3286 | ExecContext *ec; | |
cba6e062 LP |
3287 | unsigned i; |
3288 | int r; | |
3289 | ||
e06c73cc | 3290 | assert(u); |
e06c73cc | 3291 | |
598459ce LP |
3292 | /* Patch in the manager defaults into the exec and cgroup |
3293 | * contexts, _after_ the rest of the settings have been | |
3294 | * initialized */ | |
085afe36 | 3295 | |
598459ce LP |
3296 | ec = unit_get_exec_context(u); |
3297 | if (ec) { | |
3298 | /* This only copies in the ones that need memory */ | |
3299 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3300 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3301 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3302 | if (!ec->rlimit[i]) | |
3303 | return -ENOMEM; | |
3304 | } | |
3305 | ||
463d0d15 | 3306 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
3307 | !ec->working_directory) { |
3308 | ||
3309 | r = get_home_dir(&ec->working_directory); | |
3310 | if (r < 0) | |
3311 | return r; | |
4c08c824 LP |
3312 | |
3313 | /* Allow user services to run, even if the | |
3314 | * home directory is missing */ | |
3315 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3316 | } |
3317 | ||
463d0d15 | 3318 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
3319 | (ec->syscall_whitelist || |
3320 | !set_isempty(ec->syscall_filter) || | |
3321 | !set_isempty(ec->syscall_archs) || | |
3322 | ec->address_families_whitelist || | |
3323 | !set_isempty(ec->address_families))) | |
3324 | ec->no_new_privileges = true; | |
e06c73cc | 3325 | |
598459ce | 3326 | if (ec->private_devices) |
a103496c | 3327 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_MKNOD); |
29206d46 LP |
3328 | |
3329 | if (ec->dynamic_user) { | |
3330 | if (!ec->user) { | |
3331 | r = user_from_unit_name(u, &ec->user); | |
3332 | if (r < 0) | |
3333 | return r; | |
3334 | } | |
3335 | ||
3336 | if (!ec->group) { | |
3337 | ec->group = strdup(ec->user); | |
3338 | if (!ec->group) | |
3339 | return -ENOMEM; | |
3340 | } | |
3341 | ||
3342 | ec->private_tmp = true; | |
00d9ef85 | 3343 | ec->remove_ipc = true; |
29206d46 | 3344 | } |
cba6e062 LP |
3345 | } |
3346 | ||
598459ce LP |
3347 | cc = unit_get_cgroup_context(u); |
3348 | if (cc) { | |
f513e420 | 3349 | |
598459ce LP |
3350 | if (ec && |
3351 | ec->private_devices && | |
3352 | cc->device_policy == CGROUP_AUTO) | |
3353 | cc->device_policy = CGROUP_CLOSED; | |
3354 | } | |
f1660f96 | 3355 | |
cba6e062 | 3356 | return 0; |
e06c73cc LP |
3357 | } |
3358 | ||
3ef63c31 LP |
3359 | ExecContext *unit_get_exec_context(Unit *u) { |
3360 | size_t offset; | |
3361 | assert(u); | |
3362 | ||
598459ce LP |
3363 | if (u->type < 0) |
3364 | return NULL; | |
3365 | ||
3ef63c31 LP |
3366 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3367 | if (offset <= 0) | |
3368 | return NULL; | |
3369 | ||
3370 | return (ExecContext*) ((uint8_t*) u + offset); | |
3371 | } | |
3372 | ||
718db961 LP |
3373 | KillContext *unit_get_kill_context(Unit *u) { |
3374 | size_t offset; | |
3375 | assert(u); | |
3376 | ||
598459ce LP |
3377 | if (u->type < 0) |
3378 | return NULL; | |
3379 | ||
718db961 LP |
3380 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3381 | if (offset <= 0) | |
3382 | return NULL; | |
3383 | ||
3384 | return (KillContext*) ((uint8_t*) u + offset); | |
3385 | } | |
3386 | ||
4ad49000 LP |
3387 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3388 | size_t offset; | |
3389 | ||
598459ce LP |
3390 | if (u->type < 0) |
3391 | return NULL; | |
3392 | ||
4ad49000 LP |
3393 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3394 | if (offset <= 0) | |
3395 | return NULL; | |
3396 | ||
3397 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3398 | } | |
3399 | ||
613b411c LP |
3400 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3401 | size_t offset; | |
3402 | ||
598459ce LP |
3403 | if (u->type < 0) |
3404 | return NULL; | |
3405 | ||
613b411c LP |
3406 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3407 | if (offset <= 0) | |
3408 | return NULL; | |
3409 | ||
3410 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3411 | } | |
3412 | ||
39591351 | 3413 | static const char* unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode) { |
3f5e8115 LP |
3414 | assert(u); |
3415 | ||
4f4afc88 LP |
3416 | if (!IN_SET(mode, UNIT_RUNTIME, UNIT_PERSISTENT)) |
3417 | return NULL; | |
3418 | ||
39591351 LP |
3419 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
3420 | return u->manager->lookup_paths.transient; | |
26d04f86 | 3421 | |
39591351 | 3422 | if (mode == UNIT_RUNTIME) |
4f4afc88 | 3423 | return u->manager->lookup_paths.runtime_control; |
3f5e8115 | 3424 | |
39591351 | 3425 | if (mode == UNIT_PERSISTENT) |
4f4afc88 | 3426 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 3427 | |
39591351 | 3428 | return NULL; |
71645aca LP |
3429 | } |
3430 | ||
8e2af478 | 3431 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
39591351 | 3432 | _cleanup_free_ char *p = NULL, *q = NULL; |
2a9a6f8a | 3433 | const char *dir, *wrapped; |
26d04f86 | 3434 | int r; |
71645aca LP |
3435 | |
3436 | assert(u); | |
3437 | ||
4f4afc88 LP |
3438 | if (u->transient_file) { |
3439 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
3440 | * write to the transient unit file. */ | |
3441 | fputs(data, u->transient_file); | |
fc40065b | 3442 | fputc('\n', u->transient_file); |
4f4afc88 LP |
3443 | return 0; |
3444 | } | |
3445 | ||
6d235724 | 3446 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3447 | return 0; |
3448 | ||
39591351 LP |
3449 | dir = unit_drop_in_dir(u, mode); |
3450 | if (!dir) | |
3451 | return -EINVAL; | |
71645aca | 3452 | |
2a9a6f8a | 3453 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 3454 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
3455 | data, |
3456 | "\n"); | |
e20b2a86 | 3457 | |
815b09d3 | 3458 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
3459 | if (r < 0) |
3460 | return r; | |
3461 | ||
815b09d3 | 3462 | (void) mkdir_p(p, 0755); |
2a9a6f8a | 3463 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
3464 | if (r < 0) |
3465 | return r; | |
3466 | ||
815b09d3 | 3467 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
3468 | if (r < 0) |
3469 | return r; | |
815b09d3 | 3470 | q = NULL; |
adb76a70 | 3471 | |
adb76a70 WC |
3472 | strv_uniq(u->dropin_paths); |
3473 | ||
3474 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3475 | ||
3476 | return 0; | |
26d04f86 | 3477 | } |
71645aca | 3478 | |
b9ec9359 LP |
3479 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3480 | _cleanup_free_ char *p = NULL; | |
3481 | va_list ap; | |
3482 | int r; | |
3483 | ||
3484 | assert(u); | |
3485 | assert(name); | |
3486 | assert(format); | |
3487 | ||
6d235724 | 3488 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3489 | return 0; |
3490 | ||
3491 | va_start(ap, format); | |
3492 | r = vasprintf(&p, format, ap); | |
3493 | va_end(ap); | |
3494 | ||
3495 | if (r < 0) | |
3496 | return -ENOMEM; | |
3497 | ||
3498 | return unit_write_drop_in(u, mode, name, p); | |
3499 | } | |
3500 | ||
3501 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
39591351 | 3502 | const char *ndata; |
b42defe3 LP |
3503 | |
3504 | assert(u); | |
3505 | assert(name); | |
3506 | assert(data); | |
3507 | ||
3508 | if (!UNIT_VTABLE(u)->private_section) | |
3509 | return -EINVAL; | |
3510 | ||
6d235724 | 3511 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3512 | return 0; |
3513 | ||
81d62103 | 3514 | ndata = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); |
b42defe3 LP |
3515 | |
3516 | return unit_write_drop_in(u, mode, name, ndata); | |
3517 | } | |
3518 | ||
b9ec9359 LP |
3519 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3520 | _cleanup_free_ char *p = NULL; | |
3521 | va_list ap; | |
3522 | int r; | |
3523 | ||
3524 | assert(u); | |
3525 | assert(name); | |
3526 | assert(format); | |
3527 | ||
6d235724 | 3528 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3529 | return 0; |
3530 | ||
3531 | va_start(ap, format); | |
3532 | r = vasprintf(&p, format, ap); | |
3533 | va_end(ap); | |
3534 | ||
3535 | if (r < 0) | |
3536 | return -ENOMEM; | |
3537 | ||
3538 | return unit_write_drop_in_private(u, mode, name, p); | |
3539 | } | |
71645aca | 3540 | |
c2756a68 | 3541 | int unit_make_transient(Unit *u) { |
4f4afc88 LP |
3542 | FILE *f; |
3543 | char *path; | |
3544 | ||
c2756a68 LP |
3545 | assert(u); |
3546 | ||
3f5e8115 LP |
3547 | if (!UNIT_VTABLE(u)->can_transient) |
3548 | return -EOPNOTSUPP; | |
3549 | ||
4f4afc88 LP |
3550 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id, NULL); |
3551 | if (!path) | |
3552 | return -ENOMEM; | |
3553 | ||
3554 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
3555 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
3556 | ||
78e334b5 | 3557 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 3558 | f = fopen(path, "we"); |
78e334b5 ZJS |
3559 | if (!f) { |
3560 | free(path); | |
3561 | return -errno; | |
3562 | } | |
4f4afc88 LP |
3563 | } |
3564 | ||
3565 | if (u->transient_file) | |
3566 | fclose(u->transient_file); | |
3567 | u->transient_file = f; | |
3568 | ||
3569 | free(u->fragment_path); | |
3570 | u->fragment_path = path; | |
7c65093a | 3571 | |
7c65093a LP |
3572 | u->source_path = mfree(u->source_path); |
3573 | u->dropin_paths = strv_free(u->dropin_paths); | |
3574 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
3575 | ||
4f4afc88 LP |
3576 | u->load_state = UNIT_STUB; |
3577 | u->load_error = 0; | |
3578 | u->transient = true; | |
3579 | ||
7c65093a LP |
3580 | unit_add_to_dbus_queue(u); |
3581 | unit_add_to_gc_queue(u); | |
c2756a68 | 3582 | |
4f4afc88 LP |
3583 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
3584 | u->transient_file); | |
3585 | ||
3f5e8115 | 3586 | return 0; |
c2756a68 LP |
3587 | } |
3588 | ||
1d98fef1 LP |
3589 | static void log_kill(pid_t pid, int sig, void *userdata) { |
3590 | _cleanup_free_ char *comm = NULL; | |
3591 | ||
3592 | (void) get_process_comm(pid, &comm); | |
3593 | ||
3594 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
3595 | only, like for example systemd's own PAM stub process. */ | |
3596 | if (comm && comm[0] == '(') | |
3597 | return; | |
3598 | ||
3599 | log_unit_notice(userdata, | |
3600 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
3601 | pid, | |
3602 | strna(comm), | |
3603 | signal_to_string(sig)); | |
3604 | } | |
3605 | ||
3606 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
3607 | assert(c); | |
3608 | ||
3609 | switch (k) { | |
3610 | ||
3611 | case KILL_TERMINATE: | |
3612 | case KILL_TERMINATE_AND_LOG: | |
3613 | return c->kill_signal; | |
3614 | ||
3615 | case KILL_KILL: | |
3616 | return SIGKILL; | |
3617 | ||
3618 | case KILL_ABORT: | |
3619 | return SIGABRT; | |
3620 | ||
3621 | default: | |
3622 | assert_not_reached("KillOperation unknown"); | |
3623 | } | |
3624 | } | |
3625 | ||
cd2086fe LP |
3626 | int unit_kill_context( |
3627 | Unit *u, | |
3628 | KillContext *c, | |
db2cb23b | 3629 | KillOperation k, |
cd2086fe LP |
3630 | pid_t main_pid, |
3631 | pid_t control_pid, | |
3632 | bool main_pid_alien) { | |
3633 | ||
1d98fef1 LP |
3634 | bool wait_for_exit = false, send_sighup; |
3635 | cg_kill_log_func_t log_func; | |
b821a397 | 3636 | int sig, r; |
cd2086fe LP |
3637 | |
3638 | assert(u); | |
3639 | assert(c); | |
3640 | ||
1d98fef1 LP |
3641 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. Returns > 0 if we |
3642 | * killed something worth waiting for, 0 otherwise. */ | |
3643 | ||
cd2086fe LP |
3644 | if (c->kill_mode == KILL_NONE) |
3645 | return 0; | |
3646 | ||
1d98fef1 LP |
3647 | sig = operation_to_signal(c, k); |
3648 | ||
3649 | send_sighup = | |
3650 | c->send_sighup && | |
3651 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
3652 | sig != SIGHUP; | |
3653 | ||
3654 | log_func = | |
3655 | k != KILL_TERMINATE || | |
3656 | IN_SET(sig, SIGKILL, SIGABRT) ? log_kill : NULL; | |
cd2086fe LP |
3657 | |
3658 | if (main_pid > 0) { | |
1d98fef1 LP |
3659 | if (log_func) |
3660 | log_func(main_pid, sig, u); | |
cd2086fe | 3661 | |
1d98fef1 | 3662 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
3663 | if (r < 0 && r != -ESRCH) { |
3664 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 3665 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 3666 | |
b821a397 | 3667 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 3668 | } else { |
bc6aed7b LP |
3669 | if (!main_pid_alien) |
3670 | wait_for_exit = true; | |
82659fd7 | 3671 | |
1d98fef1 | 3672 | if (r != -ESRCH && send_sighup) |
d0667321 | 3673 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 3674 | } |
cd2086fe LP |
3675 | } |
3676 | ||
3677 | if (control_pid > 0) { | |
1d98fef1 LP |
3678 | if (log_func) |
3679 | log_func(control_pid, sig, u); | |
cd2086fe | 3680 | |
1d98fef1 | 3681 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
3682 | if (r < 0 && r != -ESRCH) { |
3683 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 3684 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 3685 | |
b821a397 | 3686 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 3687 | } else { |
cd2086fe | 3688 | wait_for_exit = true; |
82659fd7 | 3689 | |
1d98fef1 | 3690 | if (r != -ESRCH && send_sighup) |
d0667321 | 3691 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 3692 | } |
cd2086fe LP |
3693 | } |
3694 | ||
b821a397 LP |
3695 | if (u->cgroup_path && |
3696 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
3697 | _cleanup_set_free_ Set *pid_set = NULL; |
3698 | ||
82659fd7 LP |
3699 | /* Exclude the main/control pids from being killed via the cgroup */ |
3700 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
3701 | if (!pid_set) |
3702 | return -ENOMEM; | |
3703 | ||
1d98fef1 LP |
3704 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
3705 | sig, | |
3706 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
3707 | pid_set, | |
3708 | log_func, u); | |
cd2086fe LP |
3709 | if (r < 0) { |
3710 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
b821a397 LP |
3711 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
3712 | ||
82659fd7 | 3713 | } else if (r > 0) { |
bc6aed7b | 3714 | |
efdb0237 LP |
3715 | /* FIXME: For now, on the legacy hierarchy, we |
3716 | * will not wait for the cgroup members to die | |
3717 | * if we are running in a container or if this | |
3718 | * is a delegation unit, simply because cgroup | |
3719 | * notification is unreliable in these | |
3720 | * cases. It doesn't work at all in | |
3721 | * containers, and outside of containers it | |
3722 | * can be confused easily by left-over | |
ccddd104 | 3723 | * directories in the cgroup — which however |
efdb0237 LP |
3724 | * should not exist in non-delegated units. On |
3725 | * the unified hierarchy that's different, | |
3726 | * there we get proper events. Hence rely on | |
3727 | * them.*/ | |
3728 | ||
5da38d07 | 3729 | if (cg_unified(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
75f86906 | 3730 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 3731 | wait_for_exit = true; |
58ea275a | 3732 | |
1d98fef1 | 3733 | if (send_sighup) { |
82659fd7 LP |
3734 | set_free(pid_set); |
3735 | ||
3736 | pid_set = unit_pid_set(main_pid, control_pid); | |
3737 | if (!pid_set) | |
3738 | return -ENOMEM; | |
3739 | ||
1d98fef1 LP |
3740 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
3741 | SIGHUP, | |
3742 | CGROUP_IGNORE_SELF, | |
3743 | pid_set, | |
3744 | NULL, NULL); | |
82659fd7 LP |
3745 | } |
3746 | } | |
cd2086fe LP |
3747 | } |
3748 | ||
3749 | return wait_for_exit; | |
3750 | } | |
3751 | ||
a57f7e2c LP |
3752 | int unit_require_mounts_for(Unit *u, const char *path) { |
3753 | char prefix[strlen(path) + 1], *p; | |
3754 | int r; | |
3755 | ||
3756 | assert(u); | |
3757 | assert(path); | |
3758 | ||
3759 | /* Registers a unit for requiring a certain path and all its | |
3760 | * prefixes. We keep a simple array of these paths in the | |
3761 | * unit, since its usually short. However, we build a prefix | |
3762 | * table for all possible prefixes so that new appearing mount | |
3763 | * units can easily determine which units to make themselves a | |
3764 | * dependency of. */ | |
3765 | ||
70b64bd3 ZJS |
3766 | if (!path_is_absolute(path)) |
3767 | return -EINVAL; | |
3768 | ||
a57f7e2c LP |
3769 | p = strdup(path); |
3770 | if (!p) | |
3771 | return -ENOMEM; | |
3772 | ||
3773 | path_kill_slashes(p); | |
3774 | ||
a57f7e2c LP |
3775 | if (!path_is_safe(p)) { |
3776 | free(p); | |
3777 | return -EPERM; | |
3778 | } | |
3779 | ||
3780 | if (strv_contains(u->requires_mounts_for, p)) { | |
3781 | free(p); | |
3782 | return 0; | |
3783 | } | |
3784 | ||
6e18964d ZJS |
3785 | r = strv_consume(&u->requires_mounts_for, p); |
3786 | if (r < 0) | |
a57f7e2c | 3787 | return r; |
a57f7e2c LP |
3788 | |
3789 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
3790 | Set *x; | |
3791 | ||
3792 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
3793 | if (!x) { | |
3794 | char *q; | |
3795 | ||
742f41ad LP |
3796 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
3797 | if (r < 0) | |
3798 | return r; | |
a57f7e2c LP |
3799 | |
3800 | q = strdup(prefix); | |
3801 | if (!q) | |
3802 | return -ENOMEM; | |
3803 | ||
d5099efc | 3804 | x = set_new(NULL); |
a57f7e2c LP |
3805 | if (!x) { |
3806 | free(q); | |
3807 | return -ENOMEM; | |
3808 | } | |
3809 | ||
3810 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
3811 | if (r < 0) { | |
3812 | free(q); | |
3813 | set_free(x); | |
3814 | return r; | |
3815 | } | |
3816 | } | |
3817 | ||
3818 | r = set_put(x, u); | |
3819 | if (r < 0) | |
3820 | return r; | |
3821 | } | |
3822 | ||
3823 | return 0; | |
3824 | } | |
3825 | ||
613b411c LP |
3826 | int unit_setup_exec_runtime(Unit *u) { |
3827 | ExecRuntime **rt; | |
3828 | size_t offset; | |
3829 | Iterator i; | |
3830 | Unit *other; | |
3831 | ||
3832 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
3833 | assert(offset > 0); | |
3834 | ||
06b643e7 | 3835 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
3836 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
3837 | if (*rt) | |
3838 | return 0; | |
3839 | ||
3840 | /* Try to get it from somebody else */ | |
3841 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
3842 | ||
3843 | *rt = unit_get_exec_runtime(other); | |
3844 | if (*rt) { | |
3845 | exec_runtime_ref(*rt); | |
3846 | return 0; | |
3847 | } | |
3848 | } | |
3849 | ||
3850 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
3851 | } | |
3852 | ||
29206d46 LP |
3853 | int unit_setup_dynamic_creds(Unit *u) { |
3854 | ExecContext *ec; | |
3855 | DynamicCreds *dcreds; | |
3856 | size_t offset; | |
3857 | ||
3858 | assert(u); | |
3859 | ||
3860 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
3861 | assert(offset > 0); | |
3862 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
3863 | ||
3864 | ec = unit_get_exec_context(u); | |
3865 | assert(ec); | |
3866 | ||
3867 | if (!ec->dynamic_user) | |
3868 | return 0; | |
3869 | ||
3870 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
3871 | } | |
3872 | ||
1c2e9646 LP |
3873 | bool unit_type_supported(UnitType t) { |
3874 | if (_unlikely_(t < 0)) | |
3875 | return false; | |
3876 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
3877 | return false; | |
3878 | ||
3879 | if (!unit_vtable[t]->supported) | |
3880 | return true; | |
3881 | ||
3882 | return unit_vtable[t]->supported(); | |
3883 | } | |
3884 | ||
8b4305c7 LP |
3885 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
3886 | int r; | |
3887 | ||
3888 | assert(u); | |
3889 | assert(where); | |
3890 | ||
3891 | r = dir_is_empty(where); | |
3892 | if (r > 0) | |
3893 | return; | |
3894 | if (r < 0) { | |
3895 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
3896 | return; | |
3897 | } | |
3898 | ||
3899 | log_struct(LOG_NOTICE, | |
3900 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3901 | LOG_UNIT_ID(u), | |
3902 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
3903 | "WHERE=%s", where, | |
3904 | NULL); | |
3905 | } | |
3906 | ||
3907 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
3908 | int r; | |
3909 | ||
3910 | assert(u); | |
3911 | assert(where); | |
3912 | ||
3913 | r = is_symlink(where); | |
3914 | if (r < 0) { | |
3915 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
3916 | return 0; | |
3917 | } | |
3918 | if (r == 0) | |
3919 | return 0; | |
3920 | ||
3921 | log_struct(LOG_ERR, | |
3922 | LOG_MESSAGE_ID(SD_MESSAGE_OVERMOUNTING), | |
3923 | LOG_UNIT_ID(u), | |
3924 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), | |
3925 | "WHERE=%s", where, | |
3926 | NULL); | |
3927 | ||
3928 | return -ELOOP; | |
3929 | } | |
0f13f3bd LP |
3930 | |
3931 | bool unit_is_pristine(Unit *u) { | |
3932 | assert(u); | |
3933 | ||
7c65093a | 3934 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
3935 | * in a number of different ways. Note that to cater for unit |
3936 | * types such as slice, we are generally fine with units that | |
61233823 | 3937 | * are marked UNIT_LOADED even though nothing was |
0f13f3bd LP |
3938 | * actually loaded, as those unit types don't require a file |
3939 | * on disk to validly load. */ | |
3940 | ||
3941 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
3942 | u->fragment_path || | |
3943 | u->source_path || | |
3944 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
3945 | u->job || |
3946 | u->merged_into); | |
3947 | } | |
291d565a LP |
3948 | |
3949 | pid_t unit_control_pid(Unit *u) { | |
3950 | assert(u); | |
3951 | ||
3952 | if (UNIT_VTABLE(u)->control_pid) | |
3953 | return UNIT_VTABLE(u)->control_pid(u); | |
3954 | ||
3955 | return 0; | |
3956 | } | |
3957 | ||
3958 | pid_t unit_main_pid(Unit *u) { | |
3959 | assert(u); | |
3960 | ||
3961 | if (UNIT_VTABLE(u)->main_pid) | |
3962 | return UNIT_VTABLE(u)->main_pid(u); | |
3963 | ||
3964 | return 0; | |
3965 | } | |
00d9ef85 LP |
3966 | |
3967 | static void unit_unref_uid_internal( | |
3968 | Unit *u, | |
3969 | uid_t *ref_uid, | |
3970 | bool destroy_now, | |
3971 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
3972 | ||
3973 | assert(u); | |
3974 | assert(ref_uid); | |
3975 | assert(_manager_unref_uid); | |
3976 | ||
3977 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
3978 | * gid_t are actually the same time, with the same validity rules. | |
3979 | * | |
3980 | * Drops a reference to UID/GID from a unit. */ | |
3981 | ||
3982 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
3983 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
3984 | ||
3985 | if (!uid_is_valid(*ref_uid)) | |
3986 | return; | |
3987 | ||
3988 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
3989 | *ref_uid = UID_INVALID; | |
3990 | } | |
3991 | ||
3992 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
3993 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
3994 | } | |
3995 | ||
3996 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
3997 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
3998 | } | |
3999 | ||
4000 | static int unit_ref_uid_internal( | |
4001 | Unit *u, | |
4002 | uid_t *ref_uid, | |
4003 | uid_t uid, | |
4004 | bool clean_ipc, | |
4005 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4006 | ||
4007 | int r; | |
4008 | ||
4009 | assert(u); | |
4010 | assert(ref_uid); | |
4011 | assert(uid_is_valid(uid)); | |
4012 | assert(_manager_ref_uid); | |
4013 | ||
4014 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4015 | * are actually the same type, and have the same validity rules. | |
4016 | * | |
4017 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4018 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4019 | * drops to zero. */ | |
4020 | ||
4021 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4022 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4023 | ||
4024 | if (*ref_uid == uid) | |
4025 | return 0; | |
4026 | ||
4027 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4028 | return -EBUSY; | |
4029 | ||
4030 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4031 | if (r < 0) | |
4032 | return r; | |
4033 | ||
4034 | *ref_uid = uid; | |
4035 | return 1; | |
4036 | } | |
4037 | ||
4038 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
4039 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
4040 | } | |
4041 | ||
4042 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
4043 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
4044 | } | |
4045 | ||
4046 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4047 | int r = 0, q = 0; | |
4048 | ||
4049 | assert(u); | |
4050 | ||
4051 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4052 | ||
4053 | if (uid_is_valid(uid)) { | |
4054 | r = unit_ref_uid(u, uid, clean_ipc); | |
4055 | if (r < 0) | |
4056 | return r; | |
4057 | } | |
4058 | ||
4059 | if (gid_is_valid(gid)) { | |
4060 | q = unit_ref_gid(u, gid, clean_ipc); | |
4061 | if (q < 0) { | |
4062 | if (r > 0) | |
4063 | unit_unref_uid(u, false); | |
4064 | ||
4065 | return q; | |
4066 | } | |
4067 | } | |
4068 | ||
4069 | return r > 0 || q > 0; | |
4070 | } | |
4071 | ||
4072 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4073 | ExecContext *c; | |
4074 | int r; | |
4075 | ||
4076 | assert(u); | |
4077 | ||
4078 | c = unit_get_exec_context(u); | |
4079 | ||
4080 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4081 | if (r < 0) | |
4082 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4083 | ||
4084 | return r; | |
4085 | } | |
4086 | ||
4087 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
4088 | assert(u); | |
4089 | ||
4090 | unit_unref_uid(u, destroy_now); | |
4091 | unit_unref_gid(u, destroy_now); | |
4092 | } | |
4093 | ||
4094 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
4095 | int r; | |
4096 | ||
4097 | assert(u); | |
4098 | ||
4099 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4100 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4101 | * objects when no service references the UID/GID anymore. */ | |
4102 | ||
4103 | r = unit_ref_uid_gid(u, uid, gid); | |
4104 | if (r > 0) | |
4105 | bus_unit_send_change_signal(u); | |
4106 | } |