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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" | |
6a48d82f | 38 | #include "fd-util.h" |
a5c32cff | 39 | #include "fileio-label.h" |
f97b34a6 | 40 | #include "format-util.h" |
4b58153d | 41 | #include "id128-util.h" |
4f5dd394 LP |
42 | #include "load-dropin.h" |
43 | #include "load-fragment.h" | |
44 | #include "log.h" | |
45 | #include "macro.h" | |
46 | #include "missing.h" | |
47 | #include "mkdir.h" | |
6bedfcbb | 48 | #include "parse-util.h" |
4f5dd394 | 49 | #include "path-util.h" |
0b452006 | 50 | #include "process-util.h" |
4f5dd394 | 51 | #include "set.h" |
6eb7c172 | 52 | #include "signal-util.h" |
e9db43d5 | 53 | #include "special.h" |
8fcde012 | 54 | #include "stat-util.h" |
d054f0a4 | 55 | #include "stdio-util.h" |
07630cea | 56 | #include "string-util.h" |
4f5dd394 | 57 | #include "strv.h" |
4f4afc88 | 58 | #include "umask-util.h" |
4f5dd394 | 59 | #include "unit-name.h" |
e9db43d5 | 60 | #include "unit.h" |
b1d4f8e1 LP |
61 | #include "user-util.h" |
62 | #include "virt.h" | |
87f0e418 LP |
63 | |
64 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
65 | [UNIT_SERVICE] = &service_vtable, | |
87f0e418 LP |
66 | [UNIT_SOCKET] = &socket_vtable, |
67 | [UNIT_TARGET] = &target_vtable, | |
68 | [UNIT_DEVICE] = &device_vtable, | |
69 | [UNIT_MOUNT] = &mount_vtable, | |
70 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
01f78473 | 71 | [UNIT_SWAP] = &swap_vtable, |
e821075a | 72 | [UNIT_TIMER] = &timer_vtable, |
a016b922 | 73 | [UNIT_PATH] = &path_vtable, |
6c12b52e LP |
74 | [UNIT_SLICE] = &slice_vtable, |
75 | [UNIT_SCOPE] = &scope_vtable | |
87f0e418 LP |
76 | }; |
77 | ||
f2341e0a | 78 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency); |
d1fab3fe | 79 | |
7d17cfbc | 80 | Unit *unit_new(Manager *m, size_t size) { |
87f0e418 LP |
81 | Unit *u; |
82 | ||
83 | assert(m); | |
ac155bb8 | 84 | assert(size >= sizeof(Unit)); |
87f0e418 | 85 | |
7d17cfbc MS |
86 | u = malloc0(size); |
87 | if (!u) | |
87f0e418 LP |
88 | return NULL; |
89 | ||
d5099efc | 90 | u->names = set_new(&string_hash_ops); |
6b430fdb ZJS |
91 | if (!u->names) |
92 | return mfree(u); | |
87f0e418 | 93 | |
ac155bb8 MS |
94 | u->manager = m; |
95 | u->type = _UNIT_TYPE_INVALID; | |
ac155bb8 MS |
96 | u->default_dependencies = true; |
97 | u->unit_file_state = _UNIT_FILE_STATE_INVALID; | |
d2dc52db | 98 | u->unit_file_preset = -1; |
d420282b | 99 | u->on_failure_job_mode = JOB_REPLACE; |
efdb0237 | 100 | u->cgroup_inotify_wd = -1; |
36c16a7c | 101 | u->job_timeout = USEC_INFINITY; |
a2df3ea4 | 102 | u->job_running_timeout = USEC_INFINITY; |
00d9ef85 LP |
103 | u->ref_uid = UID_INVALID; |
104 | u->ref_gid = GID_INVALID; | |
fe700f46 | 105 | u->cpu_usage_last = NSEC_INFINITY; |
87f0e418 | 106 | |
6a48d82f DM |
107 | u->ip_accounting_ingress_map_fd = -1; |
108 | u->ip_accounting_egress_map_fd = -1; | |
109 | u->ipv4_allow_map_fd = -1; | |
110 | u->ipv6_allow_map_fd = -1; | |
111 | u->ipv4_deny_map_fd = -1; | |
112 | u->ipv6_deny_map_fd = -1; | |
113 | ||
6bf0f408 | 114 | RATELIMIT_INIT(u->start_limit, m->default_start_limit_interval, m->default_start_limit_burst); |
67bfdc97 | 115 | RATELIMIT_INIT(u->auto_stop_ratelimit, 10 * USEC_PER_SEC, 16); |
bea355da | 116 | |
87f0e418 LP |
117 | return u; |
118 | } | |
119 | ||
a581e45a LP |
120 | int unit_new_for_name(Manager *m, size_t size, const char *name, Unit **ret) { |
121 | Unit *u; | |
122 | int r; | |
123 | ||
124 | u = unit_new(m, size); | |
125 | if (!u) | |
126 | return -ENOMEM; | |
127 | ||
128 | r = unit_add_name(u, name); | |
129 | if (r < 0) { | |
130 | unit_free(u); | |
131 | return r; | |
132 | } | |
133 | ||
134 | *ret = u; | |
135 | return r; | |
136 | } | |
137 | ||
f278026d LP |
138 | bool unit_has_name(Unit *u, const char *name) { |
139 | assert(u); | |
140 | assert(name); | |
141 | ||
390bc2b1 | 142 | return set_contains(u->names, (char*) name); |
f278026d LP |
143 | } |
144 | ||
598459ce LP |
145 | static void unit_init(Unit *u) { |
146 | CGroupContext *cc; | |
147 | ExecContext *ec; | |
148 | KillContext *kc; | |
149 | ||
150 | assert(u); | |
151 | assert(u->manager); | |
152 | assert(u->type >= 0); | |
153 | ||
154 | cc = unit_get_cgroup_context(u); | |
155 | if (cc) { | |
156 | cgroup_context_init(cc); | |
157 | ||
158 | /* Copy in the manager defaults into the cgroup | |
159 | * context, _before_ the rest of the settings have | |
160 | * been initialized */ | |
161 | ||
162 | cc->cpu_accounting = u->manager->default_cpu_accounting; | |
13c31542 | 163 | cc->io_accounting = u->manager->default_io_accounting; |
377bfd2d | 164 | cc->ip_accounting = u->manager->default_ip_accounting; |
598459ce LP |
165 | cc->blockio_accounting = u->manager->default_blockio_accounting; |
166 | cc->memory_accounting = u->manager->default_memory_accounting; | |
03a7b521 | 167 | cc->tasks_accounting = u->manager->default_tasks_accounting; |
6a48d82f | 168 | cc->ip_accounting = u->manager->default_ip_accounting; |
0af20ea2 LP |
169 | |
170 | if (u->type != UNIT_SLICE) | |
171 | cc->tasks_max = u->manager->default_tasks_max; | |
598459ce LP |
172 | } |
173 | ||
174 | ec = unit_get_exec_context(u); | |
b1edf445 | 175 | if (ec) { |
598459ce LP |
176 | exec_context_init(ec); |
177 | ||
b1edf445 LP |
178 | ec->keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? |
179 | EXEC_KEYRING_PRIVATE : EXEC_KEYRING_INHERIT; | |
180 | } | |
181 | ||
598459ce LP |
182 | kc = unit_get_kill_context(u); |
183 | if (kc) | |
184 | kill_context_init(kc); | |
185 | ||
186 | if (UNIT_VTABLE(u)->init) | |
187 | UNIT_VTABLE(u)->init(u); | |
188 | } | |
189 | ||
87f0e418 | 190 | int unit_add_name(Unit *u, const char *text) { |
598459ce | 191 | _cleanup_free_ char *s = NULL, *i = NULL; |
87f0e418 | 192 | UnitType t; |
87f0e418 LP |
193 | int r; |
194 | ||
195 | assert(u); | |
196 | assert(text); | |
197 | ||
7410616c | 198 | if (unit_name_is_valid(text, UNIT_NAME_TEMPLATE)) { |
598459ce | 199 | |
ac155bb8 | 200 | if (!u->instance) |
9e2f7c11 | 201 | return -EINVAL; |
87f0e418 | 202 | |
7410616c LP |
203 | r = unit_name_replace_instance(text, u->instance, &s); |
204 | if (r < 0) | |
205 | return r; | |
206 | } else { | |
9e2f7c11 | 207 | s = strdup(text); |
7410616c LP |
208 | if (!s) |
209 | return -ENOMEM; | |
210 | } | |
87f0e418 | 211 | |
7410616c LP |
212 | if (set_contains(u->names, s)) |
213 | return 0; | |
214 | if (hashmap_contains(u->manager->units, s)) | |
215 | return -EEXIST; | |
216 | ||
217 | if (!unit_name_is_valid(s, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) | |
598459ce | 218 | return -EINVAL; |
e537352b | 219 | |
7410616c LP |
220 | t = unit_name_to_type(s); |
221 | if (t < 0) | |
222 | return -EINVAL; | |
87f0e418 | 223 | |
598459ce LP |
224 | if (u->type != _UNIT_TYPE_INVALID && t != u->type) |
225 | return -EINVAL; | |
87f0e418 | 226 | |
e48614c4 ZJS |
227 | r = unit_name_to_instance(s, &i); |
228 | if (r < 0) | |
598459ce | 229 | return r; |
87f0e418 | 230 | |
ce99c68a | 231 | if (i && !unit_type_may_template(t)) |
598459ce | 232 | return -EINVAL; |
9e2f7c11 | 233 | |
276c3e78 | 234 | /* Ensure that this unit is either instanced or not instanced, |
7410616c LP |
235 | * but not both. Note that we do allow names with different |
236 | * instance names however! */ | |
598459ce LP |
237 | if (u->type != _UNIT_TYPE_INVALID && !u->instance != !i) |
238 | return -EINVAL; | |
9e2f7c11 | 239 | |
8a993b61 | 240 | if (!unit_type_may_alias(t) && !set_isempty(u->names)) |
598459ce | 241 | return -EEXIST; |
9e2f7c11 | 242 | |
598459ce LP |
243 | if (hashmap_size(u->manager->units) >= MANAGER_MAX_NAMES) |
244 | return -E2BIG; | |
4f0f902f | 245 | |
e48614c4 | 246 | r = set_put(u->names, s); |
7410616c | 247 | if (r < 0) |
598459ce | 248 | return r; |
7410616c | 249 | assert(r > 0); |
87f0e418 | 250 | |
e48614c4 ZJS |
251 | r = hashmap_put(u->manager->units, s, u); |
252 | if (r < 0) { | |
7410616c | 253 | (void) set_remove(u->names, s); |
598459ce | 254 | return r; |
87f0e418 LP |
255 | } |
256 | ||
ac155bb8 | 257 | if (u->type == _UNIT_TYPE_INVALID) { |
ac155bb8 MS |
258 | u->type = t; |
259 | u->id = s; | |
260 | u->instance = i; | |
9e2f7c11 | 261 | |
71fda00f | 262 | LIST_PREPEND(units_by_type, u->manager->units_by_type[t], u); |
e537352b | 263 | |
598459ce | 264 | unit_init(u); |
87f0e418 | 265 | |
598459ce LP |
266 | i = NULL; |
267 | } | |
9e2f7c11 | 268 | |
598459ce | 269 | s = NULL; |
9e2f7c11 | 270 | |
598459ce LP |
271 | unit_add_to_dbus_queue(u); |
272 | return 0; | |
87f0e418 LP |
273 | } |
274 | ||
0ae97ec1 | 275 | int unit_choose_id(Unit *u, const char *name) { |
68eda4bd | 276 | _cleanup_free_ char *t = NULL; |
598459ce | 277 | char *s, *i; |
276c3e78 | 278 | int r; |
0ae97ec1 LP |
279 | |
280 | assert(u); | |
281 | assert(name); | |
282 | ||
7410616c | 283 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
9e2f7c11 | 284 | |
ac155bb8 | 285 | if (!u->instance) |
9e2f7c11 LP |
286 | return -EINVAL; |
287 | ||
7410616c LP |
288 | r = unit_name_replace_instance(name, u->instance, &t); |
289 | if (r < 0) | |
290 | return r; | |
9e2f7c11 LP |
291 | |
292 | name = t; | |
293 | } | |
294 | ||
0ae97ec1 | 295 | /* Selects one of the names of this unit as the id */ |
ac155bb8 | 296 | s = set_get(u->names, (char*) name); |
9e2f7c11 | 297 | if (!s) |
0ae97ec1 LP |
298 | return -ENOENT; |
299 | ||
7410616c | 300 | /* Determine the new instance from the new id */ |
e48614c4 ZJS |
301 | r = unit_name_to_instance(s, &i); |
302 | if (r < 0) | |
276c3e78 LP |
303 | return r; |
304 | ||
ac155bb8 | 305 | u->id = s; |
276c3e78 | 306 | |
ac155bb8 MS |
307 | free(u->instance); |
308 | u->instance = i; | |
276c3e78 | 309 | |
c1e1601e | 310 | unit_add_to_dbus_queue(u); |
9e2f7c11 | 311 | |
0ae97ec1 LP |
312 | return 0; |
313 | } | |
314 | ||
f50e0a01 LP |
315 | int unit_set_description(Unit *u, const char *description) { |
316 | char *s; | |
317 | ||
318 | assert(u); | |
319 | ||
8aec412f LP |
320 | if (isempty(description)) |
321 | s = NULL; | |
322 | else { | |
323 | s = strdup(description); | |
324 | if (!s) | |
325 | return -ENOMEM; | |
326 | } | |
f50e0a01 | 327 | |
ac155bb8 MS |
328 | free(u->description); |
329 | u->description = s; | |
c1e1601e LP |
330 | |
331 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
332 | return 0; |
333 | } | |
334 | ||
701cc384 | 335 | bool unit_check_gc(Unit *u) { |
a354329f | 336 | UnitActiveState state; |
f0bfbfac | 337 | bool inactive; |
701cc384 LP |
338 | assert(u); |
339 | ||
a354329f | 340 | if (u->job) |
701cc384 LP |
341 | return true; |
342 | ||
a354329f | 343 | if (u->nop_job) |
6c073082 LP |
344 | return true; |
345 | ||
a354329f | 346 | state = unit_active_state(u); |
f0bfbfac | 347 | inactive = state == UNIT_INACTIVE; |
a354329f LP |
348 | |
349 | /* If the unit is inactive and failed and no job is queued for | |
350 | * it, then release its runtime resources */ | |
351 | if (UNIT_IS_INACTIVE_OR_FAILED(state) && | |
352 | UNIT_VTABLE(u)->release_resources) | |
f0bfbfac | 353 | UNIT_VTABLE(u)->release_resources(u, inactive); |
a354329f LP |
354 | |
355 | /* But we keep the unit object around for longer when it is | |
356 | * referenced or configured to not be gc'ed */ | |
f0bfbfac | 357 | if (!inactive) |
701cc384 LP |
358 | return true; |
359 | ||
f5869324 | 360 | if (u->perpetual) |
701cc384 LP |
361 | return true; |
362 | ||
9d576438 LP |
363 | if (u->refs) |
364 | return true; | |
365 | ||
05a98afd LP |
366 | if (sd_bus_track_count(u->bus_track) > 0) |
367 | return true; | |
368 | ||
701cc384 LP |
369 | if (UNIT_VTABLE(u)->check_gc) |
370 | if (UNIT_VTABLE(u)->check_gc(u)) | |
371 | return true; | |
372 | ||
373 | return false; | |
374 | } | |
375 | ||
87f0e418 LP |
376 | void unit_add_to_load_queue(Unit *u) { |
377 | assert(u); | |
ac155bb8 | 378 | assert(u->type != _UNIT_TYPE_INVALID); |
87f0e418 | 379 | |
ac155bb8 | 380 | if (u->load_state != UNIT_STUB || u->in_load_queue) |
87f0e418 LP |
381 | return; |
382 | ||
71fda00f | 383 | LIST_PREPEND(load_queue, u->manager->load_queue, u); |
ac155bb8 | 384 | u->in_load_queue = true; |
87f0e418 LP |
385 | } |
386 | ||
23a177ef LP |
387 | void unit_add_to_cleanup_queue(Unit *u) { |
388 | assert(u); | |
389 | ||
ac155bb8 | 390 | if (u->in_cleanup_queue) |
23a177ef LP |
391 | return; |
392 | ||
71fda00f | 393 | LIST_PREPEND(cleanup_queue, u->manager->cleanup_queue, u); |
ac155bb8 | 394 | u->in_cleanup_queue = true; |
23a177ef LP |
395 | } |
396 | ||
701cc384 LP |
397 | void unit_add_to_gc_queue(Unit *u) { |
398 | assert(u); | |
399 | ||
ac155bb8 | 400 | if (u->in_gc_queue || u->in_cleanup_queue) |
701cc384 LP |
401 | return; |
402 | ||
403 | if (unit_check_gc(u)) | |
404 | return; | |
405 | ||
c5a97ed1 | 406 | LIST_PREPEND(gc_queue, u->manager->gc_unit_queue, u); |
ac155bb8 | 407 | u->in_gc_queue = true; |
701cc384 LP |
408 | } |
409 | ||
c1e1601e LP |
410 | void unit_add_to_dbus_queue(Unit *u) { |
411 | assert(u); | |
ac155bb8 | 412 | assert(u->type != _UNIT_TYPE_INVALID); |
c1e1601e | 413 | |
ac155bb8 | 414 | if (u->load_state == UNIT_STUB || u->in_dbus_queue) |
c1e1601e LP |
415 | return; |
416 | ||
a567261a | 417 | /* Shortcut things if nobody cares */ |
8f8f05a9 | 418 | if (sd_bus_track_count(u->manager->subscribed) <= 0 && |
ae572acd | 419 | sd_bus_track_count(u->bus_track) <= 0 && |
8f8f05a9 | 420 | set_isempty(u->manager->private_buses)) { |
ac155bb8 | 421 | u->sent_dbus_new_signal = true; |
94b6dfa2 LP |
422 | return; |
423 | } | |
424 | ||
71fda00f | 425 | LIST_PREPEND(dbus_queue, u->manager->dbus_unit_queue, u); |
ac155bb8 | 426 | u->in_dbus_queue = true; |
c1e1601e LP |
427 | } |
428 | ||
87f0e418 LP |
429 | static void bidi_set_free(Unit *u, Set *s) { |
430 | Iterator i; | |
431 | Unit *other; | |
432 | ||
433 | assert(u); | |
434 | ||
435 | /* Frees the set and makes sure we are dropped from the | |
436 | * inverse pointers */ | |
437 | ||
438 | SET_FOREACH(other, s, i) { | |
439 | UnitDependency d; | |
440 | ||
441 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
ac155bb8 | 442 | set_remove(other->dependencies[d], u); |
701cc384 LP |
443 | |
444 | unit_add_to_gc_queue(other); | |
87f0e418 LP |
445 | } |
446 | ||
447 | set_free(s); | |
448 | } | |
449 | ||
c2756a68 LP |
450 | static void unit_remove_transient(Unit *u) { |
451 | char **i; | |
452 | ||
453 | assert(u); | |
454 | ||
455 | if (!u->transient) | |
456 | return; | |
457 | ||
458 | if (u->fragment_path) | |
3f5e8115 | 459 | (void) unlink(u->fragment_path); |
c2756a68 LP |
460 | |
461 | STRV_FOREACH(i, u->dropin_paths) { | |
39591351 | 462 | _cleanup_free_ char *p = NULL, *pp = NULL; |
c2756a68 | 463 | |
39591351 LP |
464 | p = dirname_malloc(*i); /* Get the drop-in directory from the drop-in file */ |
465 | if (!p) | |
466 | continue; | |
467 | ||
468 | pp = dirname_malloc(p); /* Get the config directory from the drop-in directory */ | |
469 | if (!pp) | |
470 | continue; | |
471 | ||
472 | /* Only drop transient drop-ins */ | |
473 | if (!path_equal(u->manager->lookup_paths.transient, pp)) | |
474 | continue; | |
c2756a68 | 475 | |
39591351 LP |
476 | (void) unlink(*i); |
477 | (void) rmdir(p); | |
c2756a68 LP |
478 | } |
479 | } | |
480 | ||
a57f7e2c LP |
481 | static void unit_free_requires_mounts_for(Unit *u) { |
482 | char **j; | |
483 | ||
484 | STRV_FOREACH(j, u->requires_mounts_for) { | |
485 | char s[strlen(*j) + 1]; | |
486 | ||
487 | PATH_FOREACH_PREFIX_MORE(s, *j) { | |
488 | char *y; | |
489 | Set *x; | |
490 | ||
491 | x = hashmap_get2(u->manager->units_requiring_mounts_for, s, (void**) &y); | |
492 | if (!x) | |
493 | continue; | |
494 | ||
495 | set_remove(x, u); | |
496 | ||
497 | if (set_isempty(x)) { | |
498 | hashmap_remove(u->manager->units_requiring_mounts_for, y); | |
499 | free(y); | |
500 | set_free(x); | |
501 | } | |
502 | } | |
503 | } | |
504 | ||
6796073e | 505 | u->requires_mounts_for = strv_free(u->requires_mounts_for); |
a57f7e2c LP |
506 | } |
507 | ||
598459ce LP |
508 | static void unit_done(Unit *u) { |
509 | ExecContext *ec; | |
510 | CGroupContext *cc; | |
511 | ||
512 | assert(u); | |
513 | ||
514 | if (u->type < 0) | |
515 | return; | |
516 | ||
517 | if (UNIT_VTABLE(u)->done) | |
518 | UNIT_VTABLE(u)->done(u); | |
519 | ||
520 | ec = unit_get_exec_context(u); | |
521 | if (ec) | |
522 | exec_context_done(ec); | |
523 | ||
524 | cc = unit_get_cgroup_context(u); | |
525 | if (cc) | |
526 | cgroup_context_done(cc); | |
527 | } | |
528 | ||
87f0e418 LP |
529 | void unit_free(Unit *u) { |
530 | UnitDependency d; | |
531 | Iterator i; | |
532 | char *t; | |
533 | ||
c9d5c9c0 LP |
534 | if (!u) |
535 | return; | |
87f0e418 | 536 | |
4f4afc88 LP |
537 | if (u->transient_file) |
538 | fclose(u->transient_file); | |
539 | ||
2c289ea8 | 540 | if (!MANAGER_IS_RELOADING(u->manager)) |
c2756a68 LP |
541 | unit_remove_transient(u); |
542 | ||
c1e1601e LP |
543 | bus_unit_send_removed_signal(u); |
544 | ||
598459ce | 545 | unit_done(u); |
a013b84b | 546 | |
cf9fd508 DM |
547 | sd_bus_slot_unref(u->match_bus_slot); |
548 | ||
05a98afd LP |
549 | sd_bus_track_unref(u->bus_track); |
550 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
551 | ||
a57f7e2c LP |
552 | unit_free_requires_mounts_for(u); |
553 | ||
ac155bb8 MS |
554 | SET_FOREACH(t, u->names, i) |
555 | hashmap_remove_value(u->manager->units, t, u); | |
87f0e418 | 556 | |
4b58153d LP |
557 | if (!sd_id128_is_null(u->invocation_id)) |
558 | hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
559 | ||
97e7d748 MS |
560 | if (u->job) { |
561 | Job *j = u->job; | |
562 | job_uninstall(j); | |
563 | job_free(j); | |
564 | } | |
964e0949 | 565 | |
e0209d83 MS |
566 | if (u->nop_job) { |
567 | Job *j = u->nop_job; | |
568 | job_uninstall(j); | |
569 | job_free(j); | |
570 | } | |
571 | ||
964e0949 | 572 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) |
ac155bb8 | 573 | bidi_set_free(u, u->dependencies[d]); |
964e0949 | 574 | |
ac155bb8 | 575 | if (u->type != _UNIT_TYPE_INVALID) |
71fda00f | 576 | LIST_REMOVE(units_by_type, u->manager->units_by_type[u->type], u); |
ef734fd6 | 577 | |
ac155bb8 | 578 | if (u->in_load_queue) |
71fda00f | 579 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
87f0e418 | 580 | |
ac155bb8 | 581 | if (u->in_dbus_queue) |
71fda00f | 582 | LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u); |
c1e1601e | 583 | |
ac155bb8 | 584 | if (u->in_cleanup_queue) |
71fda00f | 585 | LIST_REMOVE(cleanup_queue, u->manager->cleanup_queue, u); |
23a177ef | 586 | |
a2d72e26 | 587 | if (u->in_gc_queue) |
c5a97ed1 | 588 | LIST_REMOVE(gc_queue, u->manager->gc_unit_queue, u); |
701cc384 | 589 | |
4ad49000 | 590 | if (u->in_cgroup_queue) |
71fda00f | 591 | LIST_REMOVE(cgroup_queue, u->manager->cgroup_queue, u); |
87f0e418 | 592 | |
efdb0237 | 593 | unit_release_cgroup(u); |
72673e86 | 594 | |
00d9ef85 LP |
595 | unit_unref_uid_gid(u, false); |
596 | ||
5269eb6b | 597 | (void) manager_update_failed_units(u->manager, u, false); |
db785129 | 598 | set_remove(u->manager->startup_units, u); |
f755e3b7 | 599 | |
ac155bb8 | 600 | free(u->description); |
49dbfa7b | 601 | strv_free(u->documentation); |
ac155bb8 | 602 | free(u->fragment_path); |
1b64d026 | 603 | free(u->source_path); |
ae7a7182 | 604 | strv_free(u->dropin_paths); |
ac155bb8 | 605 | free(u->instance); |
87f0e418 | 606 | |
f189ab18 LP |
607 | free(u->job_timeout_reboot_arg); |
608 | ||
ac155bb8 | 609 | set_free_free(u->names); |
87f0e418 | 610 | |
a911bb9a LP |
611 | unit_unwatch_all_pids(u); |
612 | ||
ac155bb8 | 613 | condition_free_list(u->conditions); |
59fccdc5 | 614 | condition_free_list(u->asserts); |
52661efd | 615 | |
6bf0f408 LP |
616 | free(u->reboot_arg); |
617 | ||
702a2d8f LP |
618 | unit_ref_unset(&u->slice); |
619 | ||
ac155bb8 MS |
620 | while (u->refs) |
621 | unit_ref_unset(u->refs); | |
57020a3a | 622 | |
6a48d82f DM |
623 | safe_close(u->ip_accounting_ingress_map_fd); |
624 | safe_close(u->ip_accounting_egress_map_fd); | |
625 | ||
626 | safe_close(u->ipv4_allow_map_fd); | |
627 | safe_close(u->ipv6_allow_map_fd); | |
628 | safe_close(u->ipv4_deny_map_fd); | |
629 | safe_close(u->ipv6_deny_map_fd); | |
630 | ||
631 | bpf_program_unref(u->ip_bpf_ingress); | |
632 | bpf_program_unref(u->ip_bpf_egress); | |
633 | ||
87f0e418 LP |
634 | free(u); |
635 | } | |
636 | ||
637 | UnitActiveState unit_active_state(Unit *u) { | |
638 | assert(u); | |
639 | ||
ac155bb8 | 640 | if (u->load_state == UNIT_MERGED) |
6124958c LP |
641 | return unit_active_state(unit_follow_merge(u)); |
642 | ||
643 | /* After a reload it might happen that a unit is not correctly | |
644 | * loaded but still has a process around. That's why we won't | |
fdf20a31 | 645 | * shortcut failed loading to UNIT_INACTIVE_FAILED. */ |
87f0e418 LP |
646 | |
647 | return UNIT_VTABLE(u)->active_state(u); | |
648 | } | |
649 | ||
10a94420 LP |
650 | const char* unit_sub_state_to_string(Unit *u) { |
651 | assert(u); | |
652 | ||
653 | return UNIT_VTABLE(u)->sub_state_to_string(u); | |
654 | } | |
655 | ||
7c0b05e5 MS |
656 | static int complete_move(Set **s, Set **other) { |
657 | int r; | |
658 | ||
23a177ef LP |
659 | assert(s); |
660 | assert(other); | |
87f0e418 | 661 | |
23a177ef | 662 | if (!*other) |
7c0b05e5 | 663 | return 0; |
87f0e418 | 664 | |
7c0b05e5 MS |
665 | if (*s) { |
666 | r = set_move(*s, *other); | |
667 | if (r < 0) | |
668 | return r; | |
669 | } else { | |
23a177ef LP |
670 | *s = *other; |
671 | *other = NULL; | |
672 | } | |
7c0b05e5 MS |
673 | |
674 | return 0; | |
23a177ef | 675 | } |
87f0e418 | 676 | |
7c0b05e5 | 677 | static int merge_names(Unit *u, Unit *other) { |
23a177ef LP |
678 | char *t; |
679 | Iterator i; | |
7c0b05e5 | 680 | int r; |
87f0e418 | 681 | |
23a177ef LP |
682 | assert(u); |
683 | assert(other); | |
684 | ||
7c0b05e5 MS |
685 | r = complete_move(&u->names, &other->names); |
686 | if (r < 0) | |
687 | return r; | |
23a177ef | 688 | |
ac155bb8 MS |
689 | set_free_free(other->names); |
690 | other->names = NULL; | |
691 | other->id = NULL; | |
23a177ef | 692 | |
ac155bb8 MS |
693 | SET_FOREACH(t, u->names, i) |
694 | assert_se(hashmap_replace(u->manager->units, t, u) == 0); | |
7c0b05e5 MS |
695 | |
696 | return 0; | |
87f0e418 LP |
697 | } |
698 | ||
09a65f92 MS |
699 | static int reserve_dependencies(Unit *u, Unit *other, UnitDependency d) { |
700 | unsigned n_reserve; | |
701 | ||
702 | assert(u); | |
703 | assert(other); | |
704 | assert(d < _UNIT_DEPENDENCY_MAX); | |
705 | ||
706 | /* | |
707 | * If u does not have this dependency set allocated, there is no need | |
f131770b | 708 | * to reserve anything. In that case other's set will be transferred |
09a65f92 MS |
709 | * as a whole to u by complete_move(). |
710 | */ | |
711 | if (!u->dependencies[d]) | |
712 | return 0; | |
713 | ||
714 | /* merge_dependencies() will skip a u-on-u dependency */ | |
715 | n_reserve = set_size(other->dependencies[d]) - !!set_get(other->dependencies[d], u); | |
716 | ||
717 | return set_reserve(u->dependencies[d], n_reserve); | |
718 | } | |
719 | ||
d1fab3fe | 720 | static void merge_dependencies(Unit *u, Unit *other, const char *other_id, UnitDependency d) { |
23a177ef LP |
721 | Iterator i; |
722 | Unit *back; | |
87f0e418 | 723 | int r; |
23a177ef LP |
724 | |
725 | assert(u); | |
726 | assert(other); | |
727 | assert(d < _UNIT_DEPENDENCY_MAX); | |
728 | ||
83a95334 | 729 | /* Fix backwards pointers */ |
ac155bb8 | 730 | SET_FOREACH(back, other->dependencies[d], i) { |
23a177ef LP |
731 | UnitDependency k; |
732 | ||
e48614c4 | 733 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) { |
e66047ff ZJS |
734 | /* Do not add dependencies between u and itself */ |
735 | if (back == u) { | |
d1fab3fe | 736 | if (set_remove(back->dependencies[k], other)) |
f2341e0a | 737 | maybe_warn_about_dependency(u, other_id, k); |
e66047ff ZJS |
738 | } else { |
739 | r = set_remove_and_put(back->dependencies[k], other, u); | |
740 | if (r == -EEXIST) | |
741 | set_remove(back->dependencies[k], other); | |
742 | else | |
743 | assert(r >= 0 || r == -ENOENT); | |
744 | } | |
e48614c4 | 745 | } |
23a177ef LP |
746 | } |
747 | ||
e66047ff | 748 | /* Also do not move dependencies on u to itself */ |
d1fab3fe ZJS |
749 | back = set_remove(other->dependencies[d], u); |
750 | if (back) | |
f2341e0a | 751 | maybe_warn_about_dependency(u, other_id, d); |
e66047ff | 752 | |
7c0b05e5 MS |
753 | /* The move cannot fail. The caller must have performed a reservation. */ |
754 | assert_se(complete_move(&u->dependencies[d], &other->dependencies[d]) == 0); | |
23a177ef | 755 | |
525d3cc7 | 756 | other->dependencies[d] = set_free(other->dependencies[d]); |
23a177ef LP |
757 | } |
758 | ||
759 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 | 760 | UnitDependency d; |
d1fab3fe | 761 | const char *other_id = NULL; |
09a65f92 | 762 | int r; |
87f0e418 LP |
763 | |
764 | assert(u); | |
765 | assert(other); | |
ac155bb8 MS |
766 | assert(u->manager == other->manager); |
767 | assert(u->type != _UNIT_TYPE_INVALID); | |
87f0e418 | 768 | |
cc916967 LP |
769 | other = unit_follow_merge(other); |
770 | ||
23a177ef LP |
771 | if (other == u) |
772 | return 0; | |
773 | ||
ac155bb8 | 774 | if (u->type != other->type) |
9e2f7c11 LP |
775 | return -EINVAL; |
776 | ||
ac155bb8 | 777 | if (!u->instance != !other->instance) |
87f0e418 LP |
778 | return -EINVAL; |
779 | ||
8a993b61 | 780 | if (!unit_type_may_alias(u->type)) /* Merging only applies to unit names that support aliases */ |
934e749e LP |
781 | return -EEXIST; |
782 | ||
ac155bb8 | 783 | if (other->load_state != UNIT_STUB && |
c2756a68 | 784 | other->load_state != UNIT_NOT_FOUND) |
23a177ef | 785 | return -EEXIST; |
87f0e418 | 786 | |
ac155bb8 | 787 | if (other->job) |
819e213f LP |
788 | return -EEXIST; |
789 | ||
e0209d83 MS |
790 | if (other->nop_job) |
791 | return -EEXIST; | |
792 | ||
fdf20a31 | 793 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) |
819e213f LP |
794 | return -EEXIST; |
795 | ||
d1fab3fe ZJS |
796 | if (other->id) |
797 | other_id = strdupa(other->id); | |
798 | ||
09a65f92 MS |
799 | /* Make reservations to ensure merge_dependencies() won't fail */ |
800 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { | |
801 | r = reserve_dependencies(u, other, d); | |
802 | /* | |
803 | * We don't rollback reservations if we fail. We don't have | |
804 | * a way to undo reservations. A reservation is not a leak. | |
805 | */ | |
806 | if (r < 0) | |
807 | return r; | |
808 | } | |
809 | ||
87f0e418 | 810 | /* Merge names */ |
7c0b05e5 MS |
811 | r = merge_names(u, other); |
812 | if (r < 0) | |
813 | return r; | |
87f0e418 | 814 | |
57020a3a | 815 | /* Redirect all references */ |
ac155bb8 MS |
816 | while (other->refs) |
817 | unit_ref_set(other->refs, u); | |
57020a3a | 818 | |
87f0e418 LP |
819 | /* Merge dependencies */ |
820 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
d1fab3fe | 821 | merge_dependencies(u, other, other_id, d); |
87f0e418 | 822 | |
ac155bb8 MS |
823 | other->load_state = UNIT_MERGED; |
824 | other->merged_into = u; | |
23a177ef | 825 | |
3616a49c LP |
826 | /* If there is still some data attached to the other node, we |
827 | * don't need it anymore, and can free it. */ | |
ac155bb8 | 828 | if (other->load_state != UNIT_STUB) |
3616a49c LP |
829 | if (UNIT_VTABLE(other)->done) |
830 | UNIT_VTABLE(other)->done(other); | |
831 | ||
832 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
833 | unit_add_to_cleanup_queue(other); |
834 | ||
835 | return 0; | |
836 | } | |
837 | ||
838 | int unit_merge_by_name(Unit *u, const char *name) { | |
934e749e | 839 | _cleanup_free_ char *s = NULL; |
23a177ef | 840 | Unit *other; |
9e2f7c11 | 841 | int r; |
23a177ef LP |
842 | |
843 | assert(u); | |
844 | assert(name); | |
845 | ||
7410616c | 846 | if (unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
ac155bb8 | 847 | if (!u->instance) |
9e2f7c11 LP |
848 | return -EINVAL; |
849 | ||
7410616c LP |
850 | r = unit_name_replace_instance(name, u->instance, &s); |
851 | if (r < 0) | |
852 | return r; | |
9e2f7c11 LP |
853 | |
854 | name = s; | |
855 | } | |
856 | ||
c2756a68 | 857 | other = manager_get_unit(u->manager, name); |
7410616c LP |
858 | if (other) |
859 | return unit_merge(u, other); | |
23a177ef | 860 | |
7410616c | 861 | return unit_add_name(u, name); |
23a177ef LP |
862 | } |
863 | ||
864 | Unit* unit_follow_merge(Unit *u) { | |
865 | assert(u); | |
866 | ||
ac155bb8 MS |
867 | while (u->load_state == UNIT_MERGED) |
868 | assert_se(u = u->merged_into); | |
23a177ef LP |
869 | |
870 | return u; | |
871 | } | |
872 | ||
873 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
ada5e276 YW |
874 | ExecDirectoryType dt; |
875 | char **dp; | |
23a177ef LP |
876 | int r; |
877 | ||
878 | assert(u); | |
879 | assert(c); | |
880 | ||
36be24c8 ZJS |
881 | if (c->working_directory) { |
882 | r = unit_require_mounts_for(u, c->working_directory); | |
883 | if (r < 0) | |
884 | return r; | |
885 | } | |
886 | ||
887 | if (c->root_directory) { | |
888 | r = unit_require_mounts_for(u, c->root_directory); | |
889 | if (r < 0) | |
890 | return r; | |
891 | } | |
892 | ||
915e6d16 LP |
893 | if (c->root_image) { |
894 | r = unit_require_mounts_for(u, c->root_image); | |
895 | if (r < 0) | |
896 | return r; | |
897 | } | |
898 | ||
ada5e276 YW |
899 | for (dt = 0; dt < _EXEC_DIRECTORY_MAX; dt++) { |
900 | if (!u->manager->prefix[dt]) | |
901 | continue; | |
902 | ||
903 | STRV_FOREACH(dp, c->directories[dt].paths) { | |
904 | _cleanup_free_ char *p; | |
905 | ||
906 | p = strjoin(u->manager->prefix[dt], "/", *dp); | |
907 | if (!p) | |
908 | return -ENOMEM; | |
909 | ||
910 | r = unit_require_mounts_for(u, p); | |
911 | if (r < 0) | |
912 | return r; | |
913 | } | |
914 | } | |
915 | ||
463d0d15 | 916 | if (!MANAGER_IS_SYSTEM(u->manager)) |
b46a529c LP |
917 | return 0; |
918 | ||
919 | if (c->private_tmp) { | |
d71f0505 LP |
920 | const char *p; |
921 | ||
922 | FOREACH_STRING(p, "/tmp", "/var/tmp") { | |
923 | r = unit_require_mounts_for(u, p); | |
924 | if (r < 0) | |
925 | return r; | |
926 | } | |
b46a529c | 927 | |
d71f0505 | 928 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_TMPFILES_SETUP_SERVICE, NULL, true); |
b46a529c LP |
929 | if (r < 0) |
930 | return r; | |
931 | } | |
932 | ||
52c239d7 LB |
933 | if (!IN_SET(c->std_output, |
934 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
935 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
936 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE) && | |
937 | !IN_SET(c->std_error, | |
938 | EXEC_OUTPUT_JOURNAL, EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
939 | EXEC_OUTPUT_KMSG, EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
940 | EXEC_OUTPUT_SYSLOG, EXEC_OUTPUT_SYSLOG_AND_CONSOLE)) | |
23a177ef LP |
941 | return 0; |
942 | ||
943 | /* If syslog or kernel logging is requested, make sure our own | |
944 | * logging daemon is run first. */ | |
945 | ||
b46a529c LP |
946 | r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_JOURNALD_SOCKET, NULL, true); |
947 | if (r < 0) | |
948 | return r; | |
23a177ef | 949 | |
87f0e418 LP |
950 | return 0; |
951 | } | |
952 | ||
87f0e418 LP |
953 | const char *unit_description(Unit *u) { |
954 | assert(u); | |
955 | ||
ac155bb8 MS |
956 | if (u->description) |
957 | return u->description; | |
87f0e418 | 958 | |
ac155bb8 | 959 | return strna(u->id); |
87f0e418 LP |
960 | } |
961 | ||
962 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
49dbfa7b | 963 | char *t, **j; |
87f0e418 LP |
964 | UnitDependency d; |
965 | Iterator i; | |
47be870b | 966 | const char *prefix2; |
173e3821 | 967 | char |
a483fb59 | 968 | timestamp0[FORMAT_TIMESTAMP_MAX], |
173e3821 LP |
969 | timestamp1[FORMAT_TIMESTAMP_MAX], |
970 | timestamp2[FORMAT_TIMESTAMP_MAX], | |
971 | timestamp3[FORMAT_TIMESTAMP_MAX], | |
faf919f1 LP |
972 | timestamp4[FORMAT_TIMESTAMP_MAX], |
973 | timespan[FORMAT_TIMESPAN_MAX]; | |
a7f241db | 974 | Unit *following; |
eeaedb7c LP |
975 | _cleanup_set_free_ Set *following_set = NULL; |
976 | int r; | |
05a98afd | 977 | const char *n; |
87f0e418 LP |
978 | |
979 | assert(u); | |
ac155bb8 | 980 | assert(u->type >= 0); |
87f0e418 | 981 | |
4c940960 | 982 | prefix = strempty(prefix); |
63c372cb | 983 | prefix2 = strjoina(prefix, "\t"); |
87f0e418 LP |
984 | |
985 | fprintf(f, | |
40d50879 | 986 | "%s-> Unit %s:\n" |
87f0e418 | 987 | "%s\tDescription: %s\n" |
9e2f7c11 | 988 | "%s\tInstance: %s\n" |
87f0e418 | 989 | "%s\tUnit Load State: %s\n" |
2fad8195 | 990 | "%s\tUnit Active State: %s\n" |
b895d155 | 991 | "%s\tState Change Timestamp: %s\n" |
173e3821 | 992 | "%s\tInactive Exit Timestamp: %s\n" |
2fad8195 | 993 | "%s\tActive Enter Timestamp: %s\n" |
701cc384 | 994 | "%s\tActive Exit Timestamp: %s\n" |
173e3821 | 995 | "%s\tInactive Enter Timestamp: %s\n" |
45fb0699 | 996 | "%s\tGC Check Good: %s\n" |
9444b1f2 | 997 | "%s\tNeed Daemon Reload: %s\n" |
c2756a68 | 998 | "%s\tTransient: %s\n" |
f5869324 | 999 | "%s\tPerpetual: %s\n" |
4ad49000 LP |
1000 | "%s\tSlice: %s\n" |
1001 | "%s\tCGroup: %s\n" | |
aae7e17f | 1002 | "%s\tCGroup realized: %s\n", |
ac155bb8 | 1003 | prefix, u->id, |
87f0e418 | 1004 | prefix, unit_description(u), |
ac155bb8 MS |
1005 | prefix, strna(u->instance), |
1006 | prefix, unit_load_state_to_string(u->load_state), | |
2fad8195 | 1007 | prefix, unit_active_state_to_string(unit_active_state(u)), |
a483fb59 | 1008 | prefix, strna(format_timestamp(timestamp0, sizeof(timestamp0), u->state_change_timestamp.realtime)), |
ac155bb8 MS |
1009 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->inactive_exit_timestamp.realtime)), |
1010 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->active_enter_timestamp.realtime)), | |
1011 | prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->active_exit_timestamp.realtime)), | |
1012 | prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->inactive_enter_timestamp.realtime)), | |
45fb0699 | 1013 | prefix, yes_no(unit_check_gc(u)), |
9444b1f2 | 1014 | prefix, yes_no(unit_need_daemon_reload(u)), |
c2756a68 | 1015 | prefix, yes_no(u->transient), |
f5869324 | 1016 | prefix, yes_no(u->perpetual), |
4ad49000 LP |
1017 | prefix, strna(unit_slice_name(u)), |
1018 | prefix, strna(u->cgroup_path), | |
aae7e17f FB |
1019 | prefix, yes_no(u->cgroup_realized)); |
1020 | ||
1021 | if (u->cgroup_realized_mask != 0) { | |
1022 | _cleanup_free_ char *s = NULL; | |
1023 | (void) cg_mask_to_string(u->cgroup_realized_mask, &s); | |
1024 | fprintf(f, "%s\tCGroup mask: %s\n", prefix, strnull(s)); | |
1025 | } | |
1026 | if (u->cgroup_members_mask != 0) { | |
1027 | _cleanup_free_ char *s = NULL; | |
1028 | (void) cg_mask_to_string(u->cgroup_members_mask, &s); | |
1029 | fprintf(f, "%s\tCGroup members mask: %s\n", prefix, strnull(s)); | |
1030 | } | |
0301abf4 | 1031 | |
ac155bb8 | 1032 | SET_FOREACH(t, u->names, i) |
87f0e418 LP |
1033 | fprintf(f, "%s\tName: %s\n", prefix, t); |
1034 | ||
4b58153d LP |
1035 | if (!sd_id128_is_null(u->invocation_id)) |
1036 | fprintf(f, "%s\tInvocation ID: " SD_ID128_FORMAT_STR "\n", | |
1037 | prefix, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
1038 | ||
49dbfa7b LP |
1039 | STRV_FOREACH(j, u->documentation) |
1040 | fprintf(f, "%s\tDocumentation: %s\n", prefix, *j); | |
1041 | ||
eeaedb7c LP |
1042 | following = unit_following(u); |
1043 | if (following) | |
ac155bb8 | 1044 | fprintf(f, "%s\tFollowing: %s\n", prefix, following->id); |
8fe914ec | 1045 | |
eeaedb7c LP |
1046 | r = unit_following_set(u, &following_set); |
1047 | if (r >= 0) { | |
1048 | Unit *other; | |
1049 | ||
1050 | SET_FOREACH(other, following_set, i) | |
1051 | fprintf(f, "%s\tFollowing Set Member: %s\n", prefix, other->id); | |
1052 | } | |
1053 | ||
ac155bb8 MS |
1054 | if (u->fragment_path) |
1055 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->fragment_path); | |
23a177ef | 1056 | |
1b64d026 LP |
1057 | if (u->source_path) |
1058 | fprintf(f, "%s\tSource Path: %s\n", prefix, u->source_path); | |
1059 | ||
ae7a7182 | 1060 | STRV_FOREACH(j, u->dropin_paths) |
2875e22b | 1061 | fprintf(f, "%s\tDropIn Path: %s\n", prefix, *j); |
ae7a7182 | 1062 | |
36c16a7c | 1063 | if (u->job_timeout != USEC_INFINITY) |
2fa4092c | 1064 | fprintf(f, "%s\tJob Timeout: %s\n", prefix, format_timespan(timespan, sizeof(timespan), u->job_timeout, 0)); |
faf919f1 | 1065 | |
87a47f99 LN |
1066 | if (u->job_timeout_action != EMERGENCY_ACTION_NONE) |
1067 | fprintf(f, "%s\tJob Timeout Action: %s\n", prefix, emergency_action_to_string(u->job_timeout_action)); | |
f189ab18 LP |
1068 | |
1069 | if (u->job_timeout_reboot_arg) | |
1070 | fprintf(f, "%s\tJob Timeout Reboot Argument: %s\n", prefix, u->job_timeout_reboot_arg); | |
1071 | ||
59fccdc5 LP |
1072 | condition_dump_list(u->conditions, f, prefix, condition_type_to_string); |
1073 | condition_dump_list(u->asserts, f, prefix, assert_type_to_string); | |
52661efd | 1074 | |
ac155bb8 | 1075 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2791a8f8 LP |
1076 | fprintf(f, |
1077 | "%s\tCondition Timestamp: %s\n" | |
1078 | "%s\tCondition Result: %s\n", | |
ac155bb8 MS |
1079 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->condition_timestamp.realtime)), |
1080 | prefix, yes_no(u->condition_result)); | |
2791a8f8 | 1081 | |
59fccdc5 LP |
1082 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
1083 | fprintf(f, | |
1084 | "%s\tAssert Timestamp: %s\n" | |
1085 | "%s\tAssert Result: %s\n", | |
1086 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->assert_timestamp.realtime)), | |
1087 | prefix, yes_no(u->assert_result)); | |
1088 | ||
87f0e418 LP |
1089 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
1090 | Unit *other; | |
1091 | ||
ac155bb8 MS |
1092 | SET_FOREACH(other, u->dependencies[d], i) |
1093 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), other->id); | |
87f0e418 LP |
1094 | } |
1095 | ||
7c8fa05c | 1096 | if (!strv_isempty(u->requires_mounts_for)) { |
7c8fa05c LP |
1097 | fprintf(f, |
1098 | "%s\tRequiresMountsFor:", prefix); | |
1099 | ||
1100 | STRV_FOREACH(j, u->requires_mounts_for) | |
1101 | fprintf(f, " %s", *j); | |
1102 | ||
1103 | fputs("\n", f); | |
1104 | } | |
1105 | ||
ac155bb8 | 1106 | if (u->load_state == UNIT_LOADED) { |
ab1f0633 | 1107 | |
b0650475 | 1108 | fprintf(f, |
a40eb732 | 1109 | "%s\tStopWhenUnneeded: %s\n" |
b5e9dba8 LP |
1110 | "%s\tRefuseManualStart: %s\n" |
1111 | "%s\tRefuseManualStop: %s\n" | |
222ae6a8 | 1112 | "%s\tDefaultDependencies: %s\n" |
d420282b | 1113 | "%s\tOnFailureJobMode: %s\n" |
36b4a7ba | 1114 | "%s\tIgnoreOnIsolate: %s\n", |
ac155bb8 MS |
1115 | prefix, yes_no(u->stop_when_unneeded), |
1116 | prefix, yes_no(u->refuse_manual_start), | |
1117 | prefix, yes_no(u->refuse_manual_stop), | |
1118 | prefix, yes_no(u->default_dependencies), | |
d420282b | 1119 | prefix, job_mode_to_string(u->on_failure_job_mode), |
36b4a7ba | 1120 | prefix, yes_no(u->ignore_on_isolate)); |
ac155bb8 | 1121 | |
23a177ef LP |
1122 | if (UNIT_VTABLE(u)->dump) |
1123 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 | 1124 | |
ac155bb8 | 1125 | } else if (u->load_state == UNIT_MERGED) |
b0650475 LP |
1126 | fprintf(f, |
1127 | "%s\tMerged into: %s\n", | |
ac155bb8 MS |
1128 | prefix, u->merged_into->id); |
1129 | else if (u->load_state == UNIT_ERROR) | |
1130 | fprintf(f, "%s\tLoad Error Code: %s\n", prefix, strerror(-u->load_error)); | |
8821a00f | 1131 | |
05a98afd LP |
1132 | for (n = sd_bus_track_first(u->bus_track); n; n = sd_bus_track_next(u->bus_track)) |
1133 | fprintf(f, "%s\tBus Ref: %s\n", prefix, n); | |
87f0e418 | 1134 | |
ac155bb8 MS |
1135 | if (u->job) |
1136 | job_dump(u->job, f, prefix2); | |
87f0e418 | 1137 | |
e0209d83 MS |
1138 | if (u->nop_job) |
1139 | job_dump(u->nop_job, f, prefix2); | |
87f0e418 LP |
1140 | } |
1141 | ||
1142 | /* Common implementation for multiple backends */ | |
e537352b | 1143 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
1144 | int r; |
1145 | ||
1146 | assert(u); | |
23a177ef | 1147 | |
e48614c4 | 1148 | /* Load a .{service,socket,...} file */ |
4ad49000 LP |
1149 | r = unit_load_fragment(u); |
1150 | if (r < 0) | |
23a177ef LP |
1151 | return r; |
1152 | ||
ac155bb8 | 1153 | if (u->load_state == UNIT_STUB) |
23a177ef LP |
1154 | return -ENOENT; |
1155 | ||
9e4ea9cc ZJS |
1156 | /* Load drop-in directory data. If u is an alias, we might be reloading the |
1157 | * target unit needlessly. But we cannot be sure which drops-ins have already | |
1158 | * been loaded and which not, at least without doing complicated book-keeping, | |
1159 | * so let's always reread all drop-ins. */ | |
1160 | return unit_load_dropin(unit_follow_merge(u)); | |
23a177ef LP |
1161 | } |
1162 | ||
1163 | /* Common implementation for multiple backends */ | |
e537352b | 1164 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 1165 | int r; |
87f0e418 LP |
1166 | |
1167 | assert(u); | |
1168 | ||
23a177ef LP |
1169 | /* Same as unit_load_fragment_and_dropin(), but whether |
1170 | * something can be loaded or not doesn't matter. */ | |
1171 | ||
1172 | /* Load a .service file */ | |
4ad49000 LP |
1173 | r = unit_load_fragment(u); |
1174 | if (r < 0) | |
87f0e418 LP |
1175 | return r; |
1176 | ||
ac155bb8 MS |
1177 | if (u->load_state == UNIT_STUB) |
1178 | u->load_state = UNIT_LOADED; | |
d46de8a1 | 1179 | |
9e4ea9cc ZJS |
1180 | /* Load drop-in directory data */ |
1181 | return unit_load_dropin(unit_follow_merge(u)); | |
87f0e418 LP |
1182 | } |
1183 | ||
bba34eed | 1184 | int unit_add_default_target_dependency(Unit *u, Unit *target) { |
98bc2000 LP |
1185 | assert(u); |
1186 | assert(target); | |
1187 | ||
ac155bb8 | 1188 | if (target->type != UNIT_TARGET) |
98bc2000 LP |
1189 | return 0; |
1190 | ||
35b8ca3a | 1191 | /* Only add the dependency if both units are loaded, so that |
bba34eed | 1192 | * that loop check below is reliable */ |
ac155bb8 MS |
1193 | if (u->load_state != UNIT_LOADED || |
1194 | target->load_state != UNIT_LOADED) | |
bba34eed LP |
1195 | return 0; |
1196 | ||
21256a2b LP |
1197 | /* If either side wants no automatic dependencies, then let's |
1198 | * skip this */ | |
ac155bb8 MS |
1199 | if (!u->default_dependencies || |
1200 | !target->default_dependencies) | |
21256a2b LP |
1201 | return 0; |
1202 | ||
98bc2000 | 1203 | /* Don't create loops */ |
ac155bb8 | 1204 | if (set_get(target->dependencies[UNIT_BEFORE], u)) |
98bc2000 LP |
1205 | return 0; |
1206 | ||
1207 | return unit_add_dependency(target, UNIT_AFTER, u, true); | |
1208 | } | |
1209 | ||
e954c9cf | 1210 | static int unit_add_target_dependencies(Unit *u) { |
a016b922 | 1211 | |
21256a2b LP |
1212 | static const UnitDependency deps[] = { |
1213 | UNIT_REQUIRED_BY, | |
be7d9ff7 | 1214 | UNIT_REQUISITE_OF, |
21256a2b LP |
1215 | UNIT_WANTED_BY, |
1216 | UNIT_BOUND_BY | |
1217 | }; | |
1218 | ||
bba34eed | 1219 | Unit *target; |
98bc2000 | 1220 | Iterator i; |
21256a2b | 1221 | unsigned k; |
db57f3c6 | 1222 | int r = 0; |
98bc2000 LP |
1223 | |
1224 | assert(u); | |
1225 | ||
21256a2b | 1226 | for (k = 0; k < ELEMENTSOF(deps); k++) |
a016b922 LP |
1227 | SET_FOREACH(target, u->dependencies[deps[k]], i) { |
1228 | r = unit_add_default_target_dependency(u, target); | |
1229 | if (r < 0) | |
21256a2b | 1230 | return r; |
a016b922 LP |
1231 | } |
1232 | ||
e954c9cf LP |
1233 | return r; |
1234 | } | |
4ad49000 | 1235 | |
e954c9cf LP |
1236 | static int unit_add_slice_dependencies(Unit *u) { |
1237 | assert(u); | |
b81884e7 | 1238 | |
35b7ff80 | 1239 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) |
e954c9cf LP |
1240 | return 0; |
1241 | ||
1242 | if (UNIT_ISSET(u->slice)) | |
8c8da0e0 | 1243 | return unit_add_two_dependencies(u, UNIT_AFTER, UNIT_REQUIRES, UNIT_DEREF(u->slice), true); |
e954c9cf | 1244 | |
8c8da0e0 | 1245 | if (unit_has_name(u, SPECIAL_ROOT_SLICE)) |
d1fab3fe ZJS |
1246 | return 0; |
1247 | ||
8c8da0e0 | 1248 | return unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_ROOT_SLICE, NULL, true); |
98bc2000 LP |
1249 | } |
1250 | ||
e954c9cf | 1251 | static int unit_add_mount_dependencies(Unit *u) { |
9588bc32 LP |
1252 | char **i; |
1253 | int r; | |
1254 | ||
1255 | assert(u); | |
1256 | ||
1257 | STRV_FOREACH(i, u->requires_mounts_for) { | |
1258 | char prefix[strlen(*i) + 1]; | |
1259 | ||
1260 | PATH_FOREACH_PREFIX_MORE(prefix, *i) { | |
c7c89abb | 1261 | _cleanup_free_ char *p = NULL; |
9588bc32 LP |
1262 | Unit *m; |
1263 | ||
c7c89abb | 1264 | r = unit_name_from_path(prefix, ".mount", &p); |
9588bc32 LP |
1265 | if (r < 0) |
1266 | return r; | |
c7c89abb FB |
1267 | |
1268 | m = manager_get_unit(u->manager, p); | |
1269 | if (!m) { | |
1270 | /* Make sure to load the mount unit if | |
1271 | * it exists. If so the dependencies | |
1272 | * on this unit will be added later | |
1273 | * during the loading of the mount | |
1274 | * unit. */ | |
1275 | (void) manager_load_unit_prepare(u->manager, p, NULL, NULL, &m); | |
9588bc32 | 1276 | continue; |
c7c89abb | 1277 | } |
9588bc32 LP |
1278 | if (m == u) |
1279 | continue; | |
1280 | ||
1281 | if (m->load_state != UNIT_LOADED) | |
1282 | continue; | |
1283 | ||
1284 | r = unit_add_dependency(u, UNIT_AFTER, m, true); | |
1285 | if (r < 0) | |
1286 | return r; | |
1287 | ||
1288 | if (m->fragment_path) { | |
1289 | r = unit_add_dependency(u, UNIT_REQUIRES, m, true); | |
1290 | if (r < 0) | |
1291 | return r; | |
1292 | } | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | return 0; | |
1297 | } | |
1298 | ||
95ae05c0 WC |
1299 | static int unit_add_startup_units(Unit *u) { |
1300 | CGroupContext *c; | |
5269eb6b | 1301 | int r; |
95ae05c0 WC |
1302 | |
1303 | c = unit_get_cgroup_context(u); | |
db785129 LP |
1304 | if (!c) |
1305 | return 0; | |
1306 | ||
d53d9474 | 1307 | if (c->startup_cpu_shares == CGROUP_CPU_SHARES_INVALID && |
13c31542 | 1308 | c->startup_io_weight == CGROUP_WEIGHT_INVALID && |
d53d9474 | 1309 | c->startup_blockio_weight == CGROUP_BLKIO_WEIGHT_INVALID) |
db785129 LP |
1310 | return 0; |
1311 | ||
5269eb6b LP |
1312 | r = set_ensure_allocated(&u->manager->startup_units, NULL); |
1313 | if (r < 0) | |
1314 | return r; | |
1315 | ||
756c09e6 | 1316 | return set_put(u->manager->startup_units, u); |
95ae05c0 WC |
1317 | } |
1318 | ||
87f0e418 LP |
1319 | int unit_load(Unit *u) { |
1320 | int r; | |
1321 | ||
1322 | assert(u); | |
1323 | ||
ac155bb8 | 1324 | if (u->in_load_queue) { |
71fda00f | 1325 | LIST_REMOVE(load_queue, u->manager->load_queue, u); |
ac155bb8 | 1326 | u->in_load_queue = false; |
87f0e418 LP |
1327 | } |
1328 | ||
ac155bb8 | 1329 | if (u->type == _UNIT_TYPE_INVALID) |
e537352b LP |
1330 | return -EINVAL; |
1331 | ||
ac155bb8 | 1332 | if (u->load_state != UNIT_STUB) |
87f0e418 LP |
1333 | return 0; |
1334 | ||
4f4afc88 LP |
1335 | if (u->transient_file) { |
1336 | r = fflush_and_check(u->transient_file); | |
1337 | if (r < 0) | |
1338 | goto fail; | |
1339 | ||
1340 | fclose(u->transient_file); | |
1341 | u->transient_file = NULL; | |
f9ba08fb | 1342 | |
f76707da | 1343 | u->fragment_mtime = now(CLOCK_REALTIME); |
4f4afc88 LP |
1344 | } |
1345 | ||
c2756a68 LP |
1346 | if (UNIT_VTABLE(u)->load) { |
1347 | r = UNIT_VTABLE(u)->load(u); | |
1348 | if (r < 0) | |
87f0e418 | 1349 | goto fail; |
c2756a68 | 1350 | } |
23a177ef | 1351 | |
ac155bb8 | 1352 | if (u->load_state == UNIT_STUB) { |
23a177ef LP |
1353 | r = -ENOENT; |
1354 | goto fail; | |
1355 | } | |
1356 | ||
7c8fa05c | 1357 | if (u->load_state == UNIT_LOADED) { |
c2756a68 | 1358 | |
e954c9cf LP |
1359 | r = unit_add_target_dependencies(u); |
1360 | if (r < 0) | |
1361 | goto fail; | |
1362 | ||
1363 | r = unit_add_slice_dependencies(u); | |
1364 | if (r < 0) | |
1365 | goto fail; | |
c2756a68 | 1366 | |
e954c9cf | 1367 | r = unit_add_mount_dependencies(u); |
7c8fa05c | 1368 | if (r < 0) |
c2756a68 | 1369 | goto fail; |
7c8fa05c | 1370 | |
95ae05c0 WC |
1371 | r = unit_add_startup_units(u); |
1372 | if (r < 0) | |
1373 | goto fail; | |
1374 | ||
bc432dc7 | 1375 | if (u->on_failure_job_mode == JOB_ISOLATE && set_size(u->dependencies[UNIT_ON_FAILURE]) > 1) { |
f2341e0a | 1376 | log_unit_error(u, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing."); |
c2756a68 LP |
1377 | r = -EINVAL; |
1378 | goto fail; | |
1379 | } | |
bc432dc7 | 1380 | |
a2df3ea4 MK |
1381 | if (u->job_running_timeout != USEC_INFINITY && u->job_running_timeout > u->job_timeout) |
1382 | log_unit_warning(u, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect."); | |
1383 | ||
bc432dc7 | 1384 | unit_update_cgroup_members_masks(u); |
f68319bb LP |
1385 | } |
1386 | ||
ac155bb8 | 1387 | assert((u->load_state != UNIT_MERGED) == !u->merged_into); |
23a177ef LP |
1388 | |
1389 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
701cc384 | 1390 | unit_add_to_gc_queue(u); |
87f0e418 | 1391 | |
87f0e418 LP |
1392 | return 0; |
1393 | ||
1394 | fail: | |
c2756a68 | 1395 | u->load_state = u->load_state == UNIT_STUB ? UNIT_NOT_FOUND : UNIT_ERROR; |
ac155bb8 | 1396 | u->load_error = r; |
c1e1601e | 1397 | unit_add_to_dbus_queue(u); |
9a46fc3b | 1398 | unit_add_to_gc_queue(u); |
23a177ef | 1399 | |
f2341e0a | 1400 | log_unit_debug_errno(u, r, "Failed to load configuration: %m"); |
23a177ef | 1401 | |
87f0e418 LP |
1402 | return r; |
1403 | } | |
1404 | ||
49365733 LP |
1405 | static bool unit_condition_test_list(Unit *u, Condition *first, const char *(*to_string)(ConditionType t)) { |
1406 | Condition *c; | |
1407 | int triggered = -1; | |
1408 | ||
1409 | assert(u); | |
1410 | assert(to_string); | |
1411 | ||
1412 | /* If the condition list is empty, then it is true */ | |
1413 | if (!first) | |
1414 | return true; | |
1415 | ||
1416 | /* Otherwise, if all of the non-trigger conditions apply and | |
1417 | * if any of the trigger conditions apply (unless there are | |
1418 | * none) we return true */ | |
1419 | LIST_FOREACH(conditions, c, first) { | |
1420 | int r; | |
1421 | ||
1422 | r = condition_test(c); | |
1423 | if (r < 0) | |
f2341e0a LP |
1424 | log_unit_warning(u, |
1425 | "Couldn't determine result for %s=%s%s%s, assuming failed: %m", | |
49365733 LP |
1426 | to_string(c->type), |
1427 | c->trigger ? "|" : "", | |
1428 | c->negate ? "!" : "", | |
f2341e0a | 1429 | c->parameter); |
49365733 | 1430 | else |
f2341e0a LP |
1431 | log_unit_debug(u, |
1432 | "%s=%s%s%s %s.", | |
49365733 LP |
1433 | to_string(c->type), |
1434 | c->trigger ? "|" : "", | |
1435 | c->negate ? "!" : "", | |
1436 | c->parameter, | |
f2341e0a | 1437 | condition_result_to_string(c->result)); |
49365733 LP |
1438 | |
1439 | if (!c->trigger && r <= 0) | |
1440 | return false; | |
1441 | ||
1442 | if (c->trigger && triggered <= 0) | |
1443 | triggered = r > 0; | |
1444 | } | |
1445 | ||
1446 | return triggered != 0; | |
1447 | } | |
1448 | ||
9588bc32 | 1449 | static bool unit_condition_test(Unit *u) { |
90bbc946 LP |
1450 | assert(u); |
1451 | ||
ac155bb8 | 1452 | dual_timestamp_get(&u->condition_timestamp); |
49365733 | 1453 | u->condition_result = unit_condition_test_list(u, u->conditions, condition_type_to_string); |
90bbc946 | 1454 | |
ac155bb8 | 1455 | return u->condition_result; |
90bbc946 LP |
1456 | } |
1457 | ||
59fccdc5 LP |
1458 | static bool unit_assert_test(Unit *u) { |
1459 | assert(u); | |
1460 | ||
1461 | dual_timestamp_get(&u->assert_timestamp); | |
49365733 | 1462 | u->assert_result = unit_condition_test_list(u, u->asserts, assert_type_to_string); |
59fccdc5 LP |
1463 | |
1464 | return u->assert_result; | |
1465 | } | |
1466 | ||
df446f96 LP |
1467 | void unit_status_printf(Unit *u, const char *status, const char *unit_status_msg_format) { |
1468 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
1469 | manager_status_printf(u->manager, STATUS_TYPE_NORMAL, status, unit_status_msg_format, unit_description(u)); | |
1470 | REENABLE_WARNING; | |
1471 | } | |
1472 | ||
44a6b1b6 | 1473 | _pure_ static const char* unit_get_status_message_format(Unit *u, JobType t) { |
877d54e9 | 1474 | const char *format; |
a85ca902 | 1475 | const UnitStatusMessageFormats *format_table; |
877d54e9 LP |
1476 | |
1477 | assert(u); | |
df446f96 | 1478 | assert(IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)); |
877d54e9 | 1479 | |
b5bf308b | 1480 | if (t != JOB_RELOAD) { |
a85ca902 MS |
1481 | format_table = &UNIT_VTABLE(u)->status_message_formats; |
1482 | if (format_table) { | |
1483 | format = format_table->starting_stopping[t == JOB_STOP]; | |
1484 | if (format) | |
1485 | return format; | |
1486 | } | |
1487 | } | |
877d54e9 LP |
1488 | |
1489 | /* Return generic strings */ | |
1490 | if (t == JOB_START) | |
1491 | return "Starting %s."; | |
1492 | else if (t == JOB_STOP) | |
1493 | return "Stopping %s."; | |
b5bf308b | 1494 | else |
877d54e9 | 1495 | return "Reloading %s."; |
877d54e9 LP |
1496 | } |
1497 | ||
1498 | static void unit_status_print_starting_stopping(Unit *u, JobType t) { | |
1499 | const char *format; | |
1500 | ||
1501 | assert(u); | |
1502 | ||
df446f96 LP |
1503 | /* Reload status messages have traditionally not been printed to console. */ |
1504 | if (!IN_SET(t, JOB_START, JOB_STOP)) | |
1505 | return; | |
1506 | ||
877d54e9 | 1507 | format = unit_get_status_message_format(u, t); |
c6918296 | 1508 | |
bcfce235 | 1509 | DISABLE_WARNING_FORMAT_NONLITERAL; |
49b1d377 | 1510 | unit_status_printf(u, "", format); |
bcfce235 | 1511 | REENABLE_WARNING; |
c6918296 MS |
1512 | } |
1513 | ||
877d54e9 | 1514 | static void unit_status_log_starting_stopping_reloading(Unit *u, JobType t) { |
2b044526 | 1515 | const char *format, *mid; |
877d54e9 | 1516 | char buf[LINE_MAX]; |
877d54e9 LP |
1517 | |
1518 | assert(u); | |
1519 | ||
df446f96 | 1520 | if (!IN_SET(t, JOB_START, JOB_STOP, JOB_RELOAD)) |
877d54e9 LP |
1521 | return; |
1522 | ||
81270860 LP |
1523 | if (log_on_console()) |
1524 | return; | |
1525 | ||
877d54e9 LP |
1526 | /* We log status messages for all units and all operations. */ |
1527 | ||
a85ca902 | 1528 | format = unit_get_status_message_format(u, t); |
877d54e9 | 1529 | |
bcfce235 | 1530 | DISABLE_WARNING_FORMAT_NONLITERAL; |
e68eedbb | 1531 | snprintf(buf, sizeof buf, format, unit_description(u)); |
bcfce235 | 1532 | REENABLE_WARNING; |
877d54e9 | 1533 | |
2b044526 ZJS |
1534 | mid = t == JOB_START ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTING_STR : |
1535 | t == JOB_STOP ? "MESSAGE_ID=" SD_MESSAGE_UNIT_STOPPING_STR : | |
1536 | "MESSAGE_ID=" SD_MESSAGE_UNIT_RELOADING_STR; | |
877d54e9 | 1537 | |
f2341e0a LP |
1538 | /* Note that we deliberately use LOG_MESSAGE() instead of |
1539 | * LOG_UNIT_MESSAGE() here, since this is supposed to mimic | |
1540 | * closely what is written to screen using the status output, | |
1541 | * which is supposed the highest level, friendliest output | |
1542 | * possible, which means we should avoid the low-level unit | |
1543 | * name. */ | |
1544 | log_struct(LOG_INFO, | |
f2341e0a | 1545 | LOG_MESSAGE("%s", buf), |
ba360bb0 ZJS |
1546 | LOG_UNIT_ID(u), |
1547 | mid, | |
f2341e0a | 1548 | NULL); |
877d54e9 | 1549 | } |
877d54e9 | 1550 | |
d1a34ae9 | 1551 | void unit_status_emit_starting_stopping_reloading(Unit *u, JobType t) { |
df446f96 LP |
1552 | assert(u); |
1553 | assert(t >= 0); | |
1554 | assert(t < _JOB_TYPE_MAX); | |
d1a34ae9 MS |
1555 | |
1556 | unit_status_log_starting_stopping_reloading(u, t); | |
df446f96 | 1557 | unit_status_print_starting_stopping(u, t); |
d1a34ae9 MS |
1558 | } |
1559 | ||
07299350 | 1560 | int unit_start_limit_test(Unit *u) { |
6bf0f408 LP |
1561 | assert(u); |
1562 | ||
1563 | if (ratelimit_test(&u->start_limit)) { | |
1564 | u->start_limit_hit = false; | |
1565 | return 0; | |
1566 | } | |
1567 | ||
1568 | log_unit_warning(u, "Start request repeated too quickly."); | |
1569 | u->start_limit_hit = true; | |
1570 | ||
87a47f99 | 1571 | return emergency_action(u->manager, u->start_limit_action, u->reboot_arg, "unit failed"); |
6bf0f408 LP |
1572 | } |
1573 | ||
c891efaf | 1574 | bool unit_shall_confirm_spawn(Unit *u) { |
631b676b | 1575 | assert(u); |
c891efaf FB |
1576 | |
1577 | if (manager_is_confirm_spawn_disabled(u->manager)) | |
1578 | return false; | |
1579 | ||
1580 | /* For some reasons units remaining in the same process group | |
1581 | * as PID 1 fail to acquire the console even if it's not used | |
1582 | * by any process. So skip the confirmation question for them. */ | |
1583 | return !unit_get_exec_context(u)->same_pgrp; | |
1584 | } | |
1585 | ||
631b676b LP |
1586 | static bool unit_verify_deps(Unit *u) { |
1587 | Unit *other; | |
1588 | Iterator j; | |
1589 | ||
1590 | assert(u); | |
1591 | ||
1592 | /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with | |
1593 | * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job | |
1594 | * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in | |
1595 | * conjunction with After= as for them any such check would make things entirely racy. */ | |
1596 | ||
1597 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], j) { | |
1598 | ||
1599 | if (!set_contains(u->dependencies[UNIT_AFTER], other)) | |
1600 | continue; | |
1601 | ||
1602 | if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other))) { | |
1603 | log_unit_notice(u, "Bound to unit %s, but unit isn't active.", other->id); | |
1604 | return false; | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | return true; | |
1609 | } | |
1610 | ||
87f0e418 | 1611 | /* Errors: |
6bf0f408 LP |
1612 | * -EBADR: This unit type does not support starting. |
1613 | * -EALREADY: Unit is already started. | |
1614 | * -EAGAIN: An operation is already in progress. Retry later. | |
1615 | * -ECANCELED: Too many requests for now. | |
1616 | * -EPROTO: Assert failed | |
1617 | * -EINVAL: Unit not loaded | |
1618 | * -EOPNOTSUPP: Unit type not supported | |
631b676b | 1619 | * -ENOLINK: The necessary dependencies are not fulfilled. |
87f0e418 LP |
1620 | */ |
1621 | int unit_start(Unit *u) { | |
1622 | UnitActiveState state; | |
92ab323c | 1623 | Unit *following; |
87f0e418 LP |
1624 | |
1625 | assert(u); | |
1626 | ||
a82e5507 LP |
1627 | /* If this is already started, then this will succeed. Note |
1628 | * that this will even succeed if this unit is not startable | |
1629 | * by the user. This is relied on to detect when we need to | |
1630 | * wait for units and when waiting is finished. */ | |
87f0e418 LP |
1631 | state = unit_active_state(u); |
1632 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
1633 | return -EALREADY; | |
1634 | ||
6bf0f408 LP |
1635 | /* Units that aren't loaded cannot be started */ |
1636 | if (u->load_state != UNIT_LOADED) | |
1637 | return -EINVAL; | |
1638 | ||
a82e5507 LP |
1639 | /* If the conditions failed, don't do anything at all. If we |
1640 | * already are activating this call might still be useful to | |
1641 | * speed up activation in case there is some hold-off time, | |
1642 | * but we don't want to recheck the condition in that case. */ | |
1643 | if (state != UNIT_ACTIVATING && | |
1644 | !unit_condition_test(u)) { | |
f2341e0a | 1645 | log_unit_debug(u, "Starting requested but condition failed. Not starting unit."); |
52661efd LP |
1646 | return -EALREADY; |
1647 | } | |
1648 | ||
59fccdc5 LP |
1649 | /* If the asserts failed, fail the entire job */ |
1650 | if (state != UNIT_ACTIVATING && | |
1651 | !unit_assert_test(u)) { | |
f2341e0a | 1652 | log_unit_notice(u, "Starting requested but asserts failed."); |
59fccdc5 LP |
1653 | return -EPROTO; |
1654 | } | |
1655 | ||
d11a7645 LP |
1656 | /* Units of types that aren't supported cannot be |
1657 | * started. Note that we do this test only after the condition | |
1658 | * checks, so that we rather return condition check errors | |
1659 | * (which are usually not considered a true failure) than "not | |
1660 | * supported" errors (which are considered a failure). | |
1661 | */ | |
1662 | if (!unit_supported(u)) | |
1663 | return -EOPNOTSUPP; | |
1664 | ||
631b676b LP |
1665 | /* Let's make sure that the deps really are in order before we start this. Normally the job engine should have |
1666 | * taken care of this already, but let's check this here again. After all, our dependencies might not be in | |
1667 | * effect anymore, due to a reload or due to a failed condition. */ | |
1668 | if (!unit_verify_deps(u)) | |
1669 | return -ENOLINK; | |
1670 | ||
92ab323c | 1671 | /* Forward to the main object, if we aren't it. */ |
52990c2e ZJS |
1672 | following = unit_following(u); |
1673 | if (following) { | |
f2341e0a | 1674 | log_unit_debug(u, "Redirecting start request from %s to %s.", u->id, following->id); |
92ab323c LP |
1675 | return unit_start(following); |
1676 | } | |
1677 | ||
1678 | /* If it is stopped, but we cannot start it, then fail */ | |
1679 | if (!UNIT_VTABLE(u)->start) | |
1680 | return -EBADR; | |
1681 | ||
87f0e418 LP |
1682 | /* We don't suppress calls to ->start() here when we are |
1683 | * already starting, to allow this request to be used as a | |
1684 | * "hurry up" call, for example when the unit is in some "auto | |
1685 | * restart" state where it waits for a holdoff timer to elapse | |
1686 | * before it will start again. */ | |
1687 | ||
c1e1601e | 1688 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1689 | |
d1a34ae9 | 1690 | return UNIT_VTABLE(u)->start(u); |
87f0e418 LP |
1691 | } |
1692 | ||
1693 | bool unit_can_start(Unit *u) { | |
1694 | assert(u); | |
1695 | ||
8ff4d2ab LP |
1696 | if (u->load_state != UNIT_LOADED) |
1697 | return false; | |
1698 | ||
1699 | if (!unit_supported(u)) | |
1700 | return false; | |
1701 | ||
87f0e418 LP |
1702 | return !!UNIT_VTABLE(u)->start; |
1703 | } | |
1704 | ||
2528a7a6 LP |
1705 | bool unit_can_isolate(Unit *u) { |
1706 | assert(u); | |
1707 | ||
1708 | return unit_can_start(u) && | |
ac155bb8 | 1709 | u->allow_isolate; |
2528a7a6 LP |
1710 | } |
1711 | ||
87f0e418 LP |
1712 | /* Errors: |
1713 | * -EBADR: This unit type does not support stopping. | |
1714 | * -EALREADY: Unit is already stopped. | |
1715 | * -EAGAIN: An operation is already in progress. Retry later. | |
1716 | */ | |
1717 | int unit_stop(Unit *u) { | |
1718 | UnitActiveState state; | |
92ab323c | 1719 | Unit *following; |
87f0e418 LP |
1720 | |
1721 | assert(u); | |
1722 | ||
87f0e418 | 1723 | state = unit_active_state(u); |
fdf20a31 | 1724 | if (UNIT_IS_INACTIVE_OR_FAILED(state)) |
87f0e418 LP |
1725 | return -EALREADY; |
1726 | ||
0faacd47 LP |
1727 | following = unit_following(u); |
1728 | if (following) { | |
f2341e0a | 1729 | log_unit_debug(u, "Redirecting stop request from %s to %s.", u->id, following->id); |
92ab323c LP |
1730 | return unit_stop(following); |
1731 | } | |
1732 | ||
7898b0cf LP |
1733 | if (!UNIT_VTABLE(u)->stop) |
1734 | return -EBADR; | |
1735 | ||
c1e1601e | 1736 | unit_add_to_dbus_queue(u); |
9e58ff9c | 1737 | |
d1a34ae9 | 1738 | return UNIT_VTABLE(u)->stop(u); |
87f0e418 LP |
1739 | } |
1740 | ||
f5869324 LP |
1741 | bool unit_can_stop(Unit *u) { |
1742 | assert(u); | |
1743 | ||
1744 | if (!unit_supported(u)) | |
1745 | return false; | |
1746 | ||
1747 | if (u->perpetual) | |
1748 | return false; | |
1749 | ||
1750 | return !!UNIT_VTABLE(u)->stop; | |
1751 | } | |
1752 | ||
87f0e418 LP |
1753 | /* Errors: |
1754 | * -EBADR: This unit type does not support reloading. | |
1755 | * -ENOEXEC: Unit is not started. | |
1756 | * -EAGAIN: An operation is already in progress. Retry later. | |
1757 | */ | |
1758 | int unit_reload(Unit *u) { | |
1759 | UnitActiveState state; | |
92ab323c | 1760 | Unit *following; |
87f0e418 LP |
1761 | |
1762 | assert(u); | |
1763 | ||
ac155bb8 | 1764 | if (u->load_state != UNIT_LOADED) |
6124958c LP |
1765 | return -EINVAL; |
1766 | ||
87f0e418 LP |
1767 | if (!unit_can_reload(u)) |
1768 | return -EBADR; | |
1769 | ||
1770 | state = unit_active_state(u); | |
e364ad06 | 1771 | if (state == UNIT_RELOADING) |
87f0e418 LP |
1772 | return -EALREADY; |
1773 | ||
6a371e23 | 1774 | if (state != UNIT_ACTIVE) { |
f2341e0a | 1775 | log_unit_warning(u, "Unit cannot be reloaded because it is inactive."); |
87f0e418 | 1776 | return -ENOEXEC; |
6a371e23 | 1777 | } |
87f0e418 | 1778 | |
e48614c4 ZJS |
1779 | following = unit_following(u); |
1780 | if (following) { | |
f2341e0a | 1781 | log_unit_debug(u, "Redirecting reload request from %s to %s.", u->id, following->id); |
92ab323c LP |
1782 | return unit_reload(following); |
1783 | } | |
1784 | ||
c1e1601e | 1785 | unit_add_to_dbus_queue(u); |
82a2b6bb | 1786 | |
f54bcca5 JR |
1787 | if (!UNIT_VTABLE(u)->reload) { |
1788 | /* Unit doesn't have a reload function, but we need to propagate the reload anyway */ | |
1789 | unit_notify(u, unit_active_state(u), unit_active_state(u), true); | |
1790 | return 0; | |
1791 | } | |
1792 | ||
d1a34ae9 | 1793 | return UNIT_VTABLE(u)->reload(u); |
87f0e418 LP |
1794 | } |
1795 | ||
1796 | bool unit_can_reload(Unit *u) { | |
1797 | assert(u); | |
1798 | ||
f54bcca5 JR |
1799 | if (UNIT_VTABLE(u)->can_reload) |
1800 | return UNIT_VTABLE(u)->can_reload(u); | |
87f0e418 | 1801 | |
f54bcca5 | 1802 | if (!set_isempty(u->dependencies[UNIT_PROPAGATES_RELOAD_TO])) |
87f0e418 LP |
1803 | return true; |
1804 | ||
f54bcca5 | 1805 | return UNIT_VTABLE(u)->reload; |
87f0e418 LP |
1806 | } |
1807 | ||
b4a16b7b | 1808 | static void unit_check_unneeded(Unit *u) { |
be7d9ff7 | 1809 | |
4afd3348 | 1810 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
4bd29fe5 | 1811 | |
be7d9ff7 LP |
1812 | static const UnitDependency needed_dependencies[] = { |
1813 | UNIT_REQUIRED_BY, | |
084918ba | 1814 | UNIT_REQUISITE_OF, |
be7d9ff7 LP |
1815 | UNIT_WANTED_BY, |
1816 | UNIT_BOUND_BY, | |
1817 | }; | |
1818 | ||
f3bff0eb | 1819 | Unit *other; |
be7d9ff7 LP |
1820 | Iterator i; |
1821 | unsigned j; | |
1822 | int r; | |
f3bff0eb LP |
1823 | |
1824 | assert(u); | |
1825 | ||
1826 | /* If this service shall be shut down when unneeded then do | |
1827 | * so. */ | |
1828 | ||
ac155bb8 | 1829 | if (!u->stop_when_unneeded) |
f3bff0eb LP |
1830 | return; |
1831 | ||
1832 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
1833 | return; | |
1834 | ||
be7d9ff7 | 1835 | for (j = 0; j < ELEMENTSOF(needed_dependencies); j++) |
f3b85044 | 1836 | SET_FOREACH(other, u->dependencies[needed_dependencies[j]], i) |
be7d9ff7 LP |
1837 | if (unit_active_or_pending(other)) |
1838 | return; | |
b81884e7 | 1839 | |
595bfe7d | 1840 | /* If stopping a unit fails continuously we might enter a stop |
bea355da LP |
1841 | * loop here, hence stop acting on the service being |
1842 | * unnecessary after a while. */ | |
67bfdc97 | 1843 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { |
bea355da LP |
1844 | log_unit_warning(u, "Unit not needed anymore, but not stopping since we tried this too often recently."); |
1845 | return; | |
1846 | } | |
1847 | ||
f2341e0a | 1848 | log_unit_info(u, "Unit not needed anymore. Stopping."); |
f3bff0eb LP |
1849 | |
1850 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
4bd29fe5 | 1851 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
be7d9ff7 | 1852 | if (r < 0) |
4bd29fe5 | 1853 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
f3bff0eb LP |
1854 | } |
1855 | ||
ff502445 | 1856 | static void unit_check_binds_to(Unit *u) { |
4afd3348 | 1857 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
ff502445 LP |
1858 | bool stop = false; |
1859 | Unit *other; | |
1860 | Iterator i; | |
67bfdc97 | 1861 | int r; |
ff502445 LP |
1862 | |
1863 | assert(u); | |
1864 | ||
1865 | if (u->job) | |
1866 | return; | |
1867 | ||
1868 | if (unit_active_state(u) != UNIT_ACTIVE) | |
1869 | return; | |
1870 | ||
1871 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) { | |
1872 | if (other->job) | |
1873 | continue; | |
13ddc3fc ZJS |
1874 | |
1875 | if (!other->coldplugged) | |
1876 | /* We might yet create a job for the other unit… */ | |
1877 | continue; | |
ff502445 LP |
1878 | |
1879 | if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other))) | |
1880 | continue; | |
1881 | ||
1882 | stop = true; | |
98f738b6 | 1883 | break; |
ff502445 LP |
1884 | } |
1885 | ||
1886 | if (!stop) | |
1887 | return; | |
1888 | ||
595bfe7d | 1889 | /* If stopping a unit fails continuously we might enter a stop |
67bfdc97 LP |
1890 | * loop here, hence stop acting on the service being |
1891 | * unnecessary after a while. */ | |
1892 | if (!ratelimit_test(&u->auto_stop_ratelimit)) { | |
1893 | log_unit_warning(u, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other->id); | |
1894 | return; | |
1895 | } | |
1896 | ||
98f738b6 | 1897 | assert(other); |
f2341e0a | 1898 | log_unit_info(u, "Unit is bound to inactive unit %s. Stopping, too.", other->id); |
ff502445 LP |
1899 | |
1900 | /* A unit we need to run is gone. Sniff. Let's stop this. */ | |
4bd29fe5 | 1901 | r = manager_add_job(u->manager, JOB_STOP, u, JOB_FAIL, &error, NULL); |
67bfdc97 | 1902 | if (r < 0) |
4bd29fe5 | 1903 | log_unit_warning_errno(u, r, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error, r)); |
ff502445 LP |
1904 | } |
1905 | ||
87f0e418 LP |
1906 | static void retroactively_start_dependencies(Unit *u) { |
1907 | Iterator i; | |
1908 | Unit *other; | |
1909 | ||
1910 | assert(u); | |
1911 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
1912 | ||
ac155bb8 MS |
1913 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
1914 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1915 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1916 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
b81884e7 | 1917 | |
7f2cddae | 1918 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
ac155bb8 | 1919 | if (!set_get(u->dependencies[UNIT_AFTER], other) && |
b81884e7 | 1920 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1921 | manager_add_job(u->manager, JOB_START, other, JOB_REPLACE, NULL, NULL); |
87f0e418 | 1922 | |
ac155bb8 MS |
1923 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
1924 | if (!set_get(u->dependencies[UNIT_AFTER], other) && | |
b81884e7 | 1925 | !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1926 | manager_add_job(u->manager, JOB_START, other, JOB_FAIL, NULL, NULL); |
87f0e418 | 1927 | |
ac155bb8 | 1928 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTS], i) |
b81884e7 | 1929 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1930 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
69dd2852 | 1931 | |
ac155bb8 | 1932 | SET_FOREACH(other, u->dependencies[UNIT_CONFLICTED_BY], i) |
b81884e7 | 1933 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1934 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
87f0e418 LP |
1935 | } |
1936 | ||
1937 | static void retroactively_stop_dependencies(Unit *u) { | |
1938 | Iterator i; | |
1939 | Unit *other; | |
1940 | ||
1941 | assert(u); | |
1942 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
1943 | ||
b81884e7 | 1944 | /* Pull down units which are bound to us recursively if enabled */ |
ac155bb8 | 1945 | SET_FOREACH(other, u->dependencies[UNIT_BOUND_BY], i) |
b81884e7 | 1946 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
4bd29fe5 | 1947 | manager_add_job(u->manager, JOB_STOP, other, JOB_REPLACE, NULL, NULL); |
cd0504d0 MS |
1948 | } |
1949 | ||
1950 | static void check_unneeded_dependencies(Unit *u) { | |
1951 | Iterator i; | |
1952 | Unit *other; | |
1953 | ||
1954 | assert(u); | |
1955 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
f3bff0eb LP |
1956 | |
1957 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
ac155bb8 | 1958 | SET_FOREACH(other, u->dependencies[UNIT_REQUIRES], i) |
87f0e418 | 1959 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1960 | unit_check_unneeded(other); |
ac155bb8 | 1961 | SET_FOREACH(other, u->dependencies[UNIT_WANTS], i) |
f3bff0eb | 1962 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1963 | unit_check_unneeded(other); |
ac155bb8 | 1964 | SET_FOREACH(other, u->dependencies[UNIT_REQUISITE], i) |
f3bff0eb | 1965 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
b4a16b7b | 1966 | unit_check_unneeded(other); |
7f2cddae | 1967 | SET_FOREACH(other, u->dependencies[UNIT_BINDS_TO], i) |
b81884e7 LP |
1968 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
1969 | unit_check_unneeded(other); | |
87f0e418 LP |
1970 | } |
1971 | ||
3ecaa09b | 1972 | void unit_start_on_failure(Unit *u) { |
c0daa706 LP |
1973 | Unit *other; |
1974 | Iterator i; | |
1975 | ||
1976 | assert(u); | |
1977 | ||
ac155bb8 | 1978 | if (set_size(u->dependencies[UNIT_ON_FAILURE]) <= 0) |
222ae6a8 LP |
1979 | return; |
1980 | ||
f2341e0a | 1981 | log_unit_info(u, "Triggering OnFailure= dependencies."); |
222ae6a8 | 1982 | |
ac155bb8 | 1983 | SET_FOREACH(other, u->dependencies[UNIT_ON_FAILURE], i) { |
222ae6a8 LP |
1984 | int r; |
1985 | ||
4bd29fe5 | 1986 | r = manager_add_job(u->manager, JOB_START, other, u->on_failure_job_mode, NULL, NULL); |
c1b6628d | 1987 | if (r < 0) |
f2341e0a | 1988 | log_unit_error_errno(u, r, "Failed to enqueue OnFailure= job: %m"); |
222ae6a8 | 1989 | } |
c0daa706 LP |
1990 | } |
1991 | ||
3ecaa09b LP |
1992 | void unit_trigger_notify(Unit *u) { |
1993 | Unit *other; | |
1994 | Iterator i; | |
1995 | ||
1996 | assert(u); | |
1997 | ||
1998 | SET_FOREACH(other, u->dependencies[UNIT_TRIGGERED_BY], i) | |
1999 | if (UNIT_VTABLE(other)->trigger_notify) | |
2000 | UNIT_VTABLE(other)->trigger_notify(other, u); | |
2001 | } | |
2002 | ||
e2f3b44c | 2003 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success) { |
546ac4f0 | 2004 | Manager *m; |
7e6e7b06 | 2005 | bool unexpected; |
a096ed36 | 2006 | |
87f0e418 LP |
2007 | assert(u); |
2008 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
2009 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
87f0e418 | 2010 | |
8e471ccd LP |
2011 | /* Note that this is called for all low-level state changes, |
2012 | * even if they might map to the same high-level | |
865cc19a | 2013 | * UnitActiveState! That means that ns == os is an expected |
c5315881 | 2014 | * behavior here. For example: if a mount point is remounted |
cd6d0a45 | 2015 | * this function will be called too! */ |
87f0e418 | 2016 | |
546ac4f0 MS |
2017 | m = u->manager; |
2018 | ||
f755e3b7 | 2019 | /* Update timestamps for state changes */ |
2c289ea8 | 2020 | if (!MANAGER_IS_RELOADING(m)) { |
a483fb59 | 2021 | dual_timestamp_get(&u->state_change_timestamp); |
173e3821 | 2022 | |
bdbf9951 | 2023 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && !UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2024 | u->inactive_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2025 | else if (!UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_INACTIVE_OR_FAILED(ns)) |
a483fb59 | 2026 | u->inactive_enter_timestamp = u->state_change_timestamp; |
bdbf9951 LP |
2027 | |
2028 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
a483fb59 | 2029 | u->active_enter_timestamp = u->state_change_timestamp; |
bdbf9951 | 2030 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
a483fb59 | 2031 | u->active_exit_timestamp = u->state_change_timestamp; |
bdbf9951 | 2032 | } |
87f0e418 | 2033 | |
865cc19a | 2034 | /* Keep track of failed units */ |
5269eb6b | 2035 | (void) manager_update_failed_units(u->manager, u, ns == UNIT_FAILED); |
f755e3b7 LP |
2036 | |
2037 | /* Make sure the cgroup is always removed when we become inactive */ | |
fdf20a31 | 2038 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
efdb0237 | 2039 | unit_prune_cgroup(u); |
fb385181 | 2040 | |
9cd86184 | 2041 | /* Note that this doesn't apply to RemainAfterExit services exiting |
6f285378 | 2042 | * successfully, since there's no change of state in that case. Which is |
9cd86184 | 2043 | * why it is handled in service_set_state() */ |
7ed9f6cd | 2044 | if (UNIT_IS_INACTIVE_OR_FAILED(os) != UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
b33918c2 LP |
2045 | ExecContext *ec; |
2046 | ||
2047 | ec = unit_get_exec_context(u); | |
7ed9f6cd | 2048 | if (ec && exec_context_may_touch_console(ec)) { |
31a7eb86 | 2049 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) { |
313cefa1 | 2050 | m->n_on_console--; |
31a7eb86 ZJS |
2051 | |
2052 | if (m->n_on_console == 0) | |
2053 | /* unset no_console_output flag, since the console is free */ | |
2f38577f | 2054 | m->no_console_output = false; |
31a7eb86 | 2055 | } else |
313cefa1 | 2056 | m->n_on_console++; |
7ed9f6cd MS |
2057 | } |
2058 | } | |
2059 | ||
ac155bb8 | 2060 | if (u->job) { |
7e6e7b06 | 2061 | unexpected = false; |
87f0e418 | 2062 | |
ac155bb8 | 2063 | if (u->job->state == JOB_WAITING) |
87f0e418 LP |
2064 | |
2065 | /* So we reached a different state for this | |
2066 | * job. Let's see if we can run it now if it | |
2067 | * failed previously due to EAGAIN. */ | |
ac155bb8 | 2068 | job_add_to_run_queue(u->job); |
87f0e418 | 2069 | |
b410e6b9 | 2070 | /* Let's check whether this state change constitutes a |
35b8ca3a | 2071 | * finished job, or maybe contradicts a running job and |
b410e6b9 | 2072 | * hence needs to invalidate jobs. */ |
87f0e418 | 2073 | |
ac155bb8 | 2074 | switch (u->job->type) { |
87f0e418 | 2075 | |
b410e6b9 LP |
2076 | case JOB_START: |
2077 | case JOB_VERIFY_ACTIVE: | |
87f0e418 | 2078 | |
b410e6b9 | 2079 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
833f92ad | 2080 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2081 | else if (u->job->state == JOB_RUNNING && ns != UNIT_ACTIVATING) { |
b410e6b9 | 2082 | unexpected = true; |
41b02ec7 | 2083 | |
fdf20a31 | 2084 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2085 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
b410e6b9 | 2086 | } |
87f0e418 | 2087 | |
b410e6b9 | 2088 | break; |
87f0e418 | 2089 | |
b410e6b9 LP |
2090 | case JOB_RELOAD: |
2091 | case JOB_RELOAD_OR_START: | |
3282591d | 2092 | case JOB_TRY_RELOAD: |
87f0e418 | 2093 | |
ac155bb8 | 2094 | if (u->job->state == JOB_RUNNING) { |
a096ed36 | 2095 | if (ns == UNIT_ACTIVE) |
833f92ad | 2096 | job_finish_and_invalidate(u->job, reload_success ? JOB_DONE : JOB_FAILED, true, false); |
032ff4af | 2097 | else if (ns != UNIT_ACTIVATING && ns != UNIT_RELOADING) { |
a096ed36 | 2098 | unexpected = true; |
41b02ec7 | 2099 | |
fdf20a31 | 2100 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2101 | job_finish_and_invalidate(u->job, ns == UNIT_FAILED ? JOB_FAILED : JOB_DONE, true, false); |
a096ed36 | 2102 | } |
b410e6b9 | 2103 | } |
87f0e418 | 2104 | |
b410e6b9 | 2105 | break; |
87f0e418 | 2106 | |
b410e6b9 LP |
2107 | case JOB_STOP: |
2108 | case JOB_RESTART: | |
2109 | case JOB_TRY_RESTART: | |
87f0e418 | 2110 | |
fdf20a31 | 2111 | if (UNIT_IS_INACTIVE_OR_FAILED(ns)) |
833f92ad | 2112 | job_finish_and_invalidate(u->job, JOB_DONE, true, false); |
ac155bb8 | 2113 | else if (u->job->state == JOB_RUNNING && ns != UNIT_DEACTIVATING) { |
b410e6b9 | 2114 | unexpected = true; |
833f92ad | 2115 | job_finish_and_invalidate(u->job, JOB_FAILED, true, false); |
b410e6b9 | 2116 | } |
87f0e418 | 2117 | |
b410e6b9 | 2118 | break; |
87f0e418 | 2119 | |
b410e6b9 LP |
2120 | default: |
2121 | assert_not_reached("Job type unknown"); | |
87f0e418 | 2122 | } |
87f0e418 | 2123 | |
7e6e7b06 LP |
2124 | } else |
2125 | unexpected = true; | |
2126 | ||
2c289ea8 | 2127 | if (!MANAGER_IS_RELOADING(m)) { |
f3bff0eb | 2128 | |
bdbf9951 LP |
2129 | /* If this state change happened without being |
2130 | * requested by a job, then let's retroactively start | |
2131 | * or stop dependencies. We skip that step when | |
2132 | * deserializing, since we don't want to create any | |
2133 | * additional jobs just because something is already | |
2134 | * activated. */ | |
2135 | ||
2136 | if (unexpected) { | |
2137 | if (UNIT_IS_INACTIVE_OR_FAILED(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
2138 | retroactively_start_dependencies(u); | |
2139 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
2140 | retroactively_stop_dependencies(u); | |
2141 | } | |
5de9682c | 2142 | |
cd0504d0 | 2143 | /* stop unneeded units regardless if going down was expected or not */ |
b33918c2 | 2144 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) |
cd0504d0 MS |
2145 | check_unneeded_dependencies(u); |
2146 | ||
bdbf9951 | 2147 | if (ns != os && ns == UNIT_FAILED) { |
f2341e0a | 2148 | log_unit_notice(u, "Unit entered failed state."); |
3ecaa09b | 2149 | unit_start_on_failure(u); |
cd6d0a45 | 2150 | } |
3b2775c5 | 2151 | } |
e537352b | 2152 | |
3b2775c5 LP |
2153 | /* Some names are special */ |
2154 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
2155 | ||
2156 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) | |
865cc19a | 2157 | /* The bus might have just become available, |
3b2775c5 LP |
2158 | * hence try to connect to it, if we aren't |
2159 | * yet connected. */ | |
546ac4f0 | 2160 | bus_init(m, true); |
3b2775c5 | 2161 | |
ac155bb8 | 2162 | if (u->type == UNIT_SERVICE && |
3b2775c5 | 2163 | !UNIT_IS_ACTIVE_OR_RELOADING(os) && |
2c289ea8 | 2164 | !MANAGER_IS_RELOADING(m)) { |
3b2775c5 | 2165 | /* Write audit record if we have just finished starting up */ |
546ac4f0 | 2166 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, true); |
ac155bb8 | 2167 | u->in_audit = true; |
3b2775c5 | 2168 | } |
e983b760 | 2169 | |
3b2775c5 | 2170 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os)) |
546ac4f0 | 2171 | manager_send_unit_plymouth(m, u); |
bdbf9951 | 2172 | |
3b2775c5 | 2173 | } else { |
bdbf9951 | 2174 | |
3b2775c5 LP |
2175 | /* We don't care about D-Bus here, since we'll get an |
2176 | * asynchronous notification for it anyway. */ | |
cd6d0a45 | 2177 | |
ac155bb8 | 2178 | if (u->type == UNIT_SERVICE && |
3b2775c5 LP |
2179 | UNIT_IS_INACTIVE_OR_FAILED(ns) && |
2180 | !UNIT_IS_INACTIVE_OR_FAILED(os) && | |
2c289ea8 | 2181 | !MANAGER_IS_RELOADING(m)) { |
4927fcae | 2182 | |
3b2775c5 LP |
2183 | /* Hmm, if there was no start record written |
2184 | * write it now, so that we always have a nice | |
2185 | * pair */ | |
ac155bb8 | 2186 | if (!u->in_audit) { |
546ac4f0 | 2187 | manager_send_unit_audit(m, u, AUDIT_SERVICE_START, ns == UNIT_INACTIVE); |
cd6d0a45 | 2188 | |
3b2775c5 | 2189 | if (ns == UNIT_INACTIVE) |
546ac4f0 | 2190 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, true); |
3b2775c5 LP |
2191 | } else |
2192 | /* Write audit record if we have just finished shutting down */ | |
546ac4f0 | 2193 | manager_send_unit_audit(m, u, AUDIT_SERVICE_STOP, ns == UNIT_INACTIVE); |
bdbf9951 | 2194 | |
ac155bb8 | 2195 | u->in_audit = false; |
cd6d0a45 | 2196 | } |
f278026d LP |
2197 | } |
2198 | ||
546ac4f0 | 2199 | manager_recheck_journal(m); |
3ecaa09b | 2200 | unit_trigger_notify(u); |
3b2775c5 | 2201 | |
2c289ea8 | 2202 | if (!MANAGER_IS_RELOADING(u->manager)) { |
ff502445 LP |
2203 | /* Maybe we finished startup and are now ready for |
2204 | * being stopped because unneeded? */ | |
bf6dcfa6 | 2205 | unit_check_unneeded(u); |
c1e1601e | 2206 | |
ff502445 LP |
2207 | /* Maybe we finished startup, but something we needed |
2208 | * has vanished? Let's die then. (This happens when | |
2209 | * something BindsTo= to a Type=oneshot unit, as these | |
2210 | * units go directly from starting to inactive, | |
2211 | * without ever entering started.) */ | |
2212 | unit_check_binds_to(u); | |
2213 | } | |
2214 | ||
c1e1601e | 2215 | unit_add_to_dbus_queue(u); |
701cc384 | 2216 | unit_add_to_gc_queue(u); |
87f0e418 LP |
2217 | } |
2218 | ||
87f0e418 | 2219 | int unit_watch_pid(Unit *u, pid_t pid) { |
a911bb9a LP |
2220 | int q, r; |
2221 | ||
87f0e418 LP |
2222 | assert(u); |
2223 | assert(pid >= 1); | |
2224 | ||
5ba6985b LP |
2225 | /* Watch a specific PID. We only support one or two units |
2226 | * watching each PID for now, not more. */ | |
2227 | ||
d5099efc | 2228 | r = set_ensure_allocated(&u->pids, NULL); |
5ba6985b LP |
2229 | if (r < 0) |
2230 | return r; | |
2231 | ||
d5099efc | 2232 | r = hashmap_ensure_allocated(&u->manager->watch_pids1, NULL); |
a911bb9a LP |
2233 | if (r < 0) |
2234 | return r; | |
2235 | ||
fea72cc0 | 2236 | r = hashmap_put(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
5ba6985b | 2237 | if (r == -EEXIST) { |
d5099efc | 2238 | r = hashmap_ensure_allocated(&u->manager->watch_pids2, NULL); |
5ba6985b LP |
2239 | if (r < 0) |
2240 | return r; | |
05e343b7 | 2241 | |
fea72cc0 | 2242 | r = hashmap_put(u->manager->watch_pids2, PID_TO_PTR(pid), u); |
5ba6985b | 2243 | } |
a911bb9a | 2244 | |
fea72cc0 | 2245 | q = set_put(u->pids, PID_TO_PTR(pid)); |
a911bb9a LP |
2246 | if (q < 0) |
2247 | return q; | |
2248 | ||
2249 | return r; | |
87f0e418 LP |
2250 | } |
2251 | ||
2252 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
2253 | assert(u); | |
2254 | assert(pid >= 1); | |
2255 | ||
fea72cc0 LP |
2256 | (void) hashmap_remove_value(u->manager->watch_pids1, PID_TO_PTR(pid), u); |
2257 | (void) hashmap_remove_value(u->manager->watch_pids2, PID_TO_PTR(pid), u); | |
2258 | (void) set_remove(u->pids, PID_TO_PTR(pid)); | |
a911bb9a LP |
2259 | } |
2260 | ||
bd44e61b LP |
2261 | void unit_unwatch_all_pids(Unit *u) { |
2262 | assert(u); | |
2263 | ||
2264 | while (!set_isempty(u->pids)) | |
fea72cc0 | 2265 | unit_unwatch_pid(u, PTR_TO_PID(set_first(u->pids))); |
bd44e61b | 2266 | |
efdb0237 | 2267 | u->pids = set_free(u->pids); |
a911bb9a LP |
2268 | } |
2269 | ||
2270 | void unit_tidy_watch_pids(Unit *u, pid_t except1, pid_t except2) { | |
2271 | Iterator i; | |
2272 | void *e; | |
2273 | ||
2274 | assert(u); | |
2275 | ||
2276 | /* Cleans dead PIDs from our list */ | |
2277 | ||
2278 | SET_FOREACH(e, u->pids, i) { | |
fea72cc0 | 2279 | pid_t pid = PTR_TO_PID(e); |
a911bb9a LP |
2280 | |
2281 | if (pid == except1 || pid == except2) | |
2282 | continue; | |
2283 | ||
9f5650ae | 2284 | if (!pid_is_unwaited(pid)) |
bd44e61b | 2285 | unit_unwatch_pid(u, pid); |
a911bb9a | 2286 | } |
87f0e418 LP |
2287 | } |
2288 | ||
87f0e418 LP |
2289 | bool unit_job_is_applicable(Unit *u, JobType j) { |
2290 | assert(u); | |
2291 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
2292 | ||
2293 | switch (j) { | |
2294 | ||
2295 | case JOB_VERIFY_ACTIVE: | |
2296 | case JOB_START: | |
e0209d83 | 2297 | case JOB_NOP: |
f5869324 LP |
2298 | /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not |
2299 | * startable by us but may appear due to external events, and it thus makes sense to permit enqueing | |
2300 | * jobs for it. */ | |
87f0e418 LP |
2301 | return true; |
2302 | ||
f5869324 LP |
2303 | case JOB_STOP: |
2304 | /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to | |
2305 | * external events), hence it makes no sense to permit enqueing such a request either. */ | |
2306 | return !u->perpetual; | |
2307 | ||
87f0e418 LP |
2308 | case JOB_RESTART: |
2309 | case JOB_TRY_RESTART: | |
f5869324 | 2310 | return unit_can_stop(u) && unit_can_start(u); |
87f0e418 LP |
2311 | |
2312 | case JOB_RELOAD: | |
3282591d | 2313 | case JOB_TRY_RELOAD: |
87f0e418 LP |
2314 | return unit_can_reload(u); |
2315 | ||
2316 | case JOB_RELOAD_OR_START: | |
2317 | return unit_can_reload(u) && unit_can_start(u); | |
2318 | ||
2319 | default: | |
2320 | assert_not_reached("Invalid job type"); | |
2321 | } | |
2322 | } | |
2323 | ||
f2341e0a LP |
2324 | static void maybe_warn_about_dependency(Unit *u, const char *other, UnitDependency dependency) { |
2325 | assert(u); | |
d1fab3fe | 2326 | |
f2341e0a LP |
2327 | /* Only warn about some unit types */ |
2328 | if (!IN_SET(dependency, UNIT_CONFLICTS, UNIT_CONFLICTED_BY, UNIT_BEFORE, UNIT_AFTER, UNIT_ON_FAILURE, UNIT_TRIGGERS, UNIT_TRIGGERED_BY)) | |
2329 | return; | |
3f3cc397 | 2330 | |
f2341e0a LP |
2331 | if (streq_ptr(u->id, other)) |
2332 | log_unit_warning(u, "Dependency %s=%s dropped", unit_dependency_to_string(dependency), u->id); | |
2333 | else | |
2334 | log_unit_warning(u, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency), strna(other), u->id); | |
d1fab3fe ZJS |
2335 | } |
2336 | ||
701cc384 | 2337 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference) { |
87f0e418 LP |
2338 | |
2339 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
2340 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
87f0e418 | 2341 | [UNIT_WANTS] = UNIT_WANTED_BY, |
be7d9ff7 | 2342 | [UNIT_REQUISITE] = UNIT_REQUISITE_OF, |
7f2cddae | 2343 | [UNIT_BINDS_TO] = UNIT_BOUND_BY, |
60649f17 | 2344 | [UNIT_PART_OF] = UNIT_CONSISTS_OF, |
be7d9ff7 | 2345 | [UNIT_REQUIRED_BY] = UNIT_REQUIRES, |
be7d9ff7 | 2346 | [UNIT_REQUISITE_OF] = UNIT_REQUISITE, |
be7d9ff7 | 2347 | [UNIT_WANTED_BY] = UNIT_WANTS, |
7f2cddae | 2348 | [UNIT_BOUND_BY] = UNIT_BINDS_TO, |
60649f17 | 2349 | [UNIT_CONSISTS_OF] = UNIT_PART_OF, |
69dd2852 LP |
2350 | [UNIT_CONFLICTS] = UNIT_CONFLICTED_BY, |
2351 | [UNIT_CONFLICTED_BY] = UNIT_CONFLICTS, | |
87f0e418 | 2352 | [UNIT_BEFORE] = UNIT_AFTER, |
701cc384 | 2353 | [UNIT_AFTER] = UNIT_BEFORE, |
5de9682c | 2354 | [UNIT_ON_FAILURE] = _UNIT_DEPENDENCY_INVALID, |
701cc384 | 2355 | [UNIT_REFERENCES] = UNIT_REFERENCED_BY, |
57020a3a LP |
2356 | [UNIT_REFERENCED_BY] = UNIT_REFERENCES, |
2357 | [UNIT_TRIGGERS] = UNIT_TRIGGERED_BY, | |
4dcc1cb4 | 2358 | [UNIT_TRIGGERED_BY] = UNIT_TRIGGERS, |
7f2cddae | 2359 | [UNIT_PROPAGATES_RELOAD_TO] = UNIT_RELOAD_PROPAGATED_FROM, |
85e9a101 | 2360 | [UNIT_RELOAD_PROPAGATED_FROM] = UNIT_PROPAGATES_RELOAD_TO, |
613b411c | 2361 | [UNIT_JOINS_NAMESPACE_OF] = UNIT_JOINS_NAMESPACE_OF, |
87f0e418 | 2362 | }; |
701cc384 | 2363 | int r, q = 0, v = 0, w = 0; |
d1fab3fe | 2364 | Unit *orig_u = u, *orig_other = other; |
87f0e418 LP |
2365 | |
2366 | assert(u); | |
2367 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
87f0e418 LP |
2368 | assert(other); |
2369 | ||
9f151f29 LP |
2370 | u = unit_follow_merge(u); |
2371 | other = unit_follow_merge(other); | |
2372 | ||
87f0e418 LP |
2373 | /* We won't allow dependencies on ourselves. We will not |
2374 | * consider them an error however. */ | |
d1fab3fe | 2375 | if (u == other) { |
f2341e0a | 2376 | maybe_warn_about_dependency(orig_u, orig_other->id, d); |
87f0e418 | 2377 | return 0; |
d1fab3fe | 2378 | } |
87f0e418 | 2379 | |
dd5e7000 ZJS |
2380 | if (d == UNIT_BEFORE && other->type == UNIT_DEVICE) { |
2381 | log_unit_warning(u, "Dependency Before=%s ignored (.device units cannot be delayed)", other->id); | |
2382 | return 0; | |
2383 | } | |
2384 | ||
d5099efc | 2385 | r = set_ensure_allocated(&u->dependencies[d], NULL); |
613b411c | 2386 | if (r < 0) |
87f0e418 LP |
2387 | return r; |
2388 | ||
613b411c | 2389 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID) { |
d5099efc | 2390 | r = set_ensure_allocated(&other->dependencies[inverse_table[d]], NULL); |
613b411c LP |
2391 | if (r < 0) |
2392 | return r; | |
2393 | } | |
2394 | ||
2395 | if (add_reference) { | |
d5099efc | 2396 | r = set_ensure_allocated(&u->dependencies[UNIT_REFERENCES], NULL); |
613b411c | 2397 | if (r < 0) |
5de9682c LP |
2398 | return r; |
2399 | ||
d5099efc | 2400 | r = set_ensure_allocated(&other->dependencies[UNIT_REFERENCED_BY], NULL); |
613b411c | 2401 | if (r < 0) |
701cc384 | 2402 | return r; |
613b411c | 2403 | } |
87f0e418 | 2404 | |
613b411c LP |
2405 | q = set_put(u->dependencies[d], other); |
2406 | if (q < 0) | |
701cc384 | 2407 | return q; |
87f0e418 | 2408 | |
613b411c LP |
2409 | if (inverse_table[d] != _UNIT_DEPENDENCY_INVALID && inverse_table[d] != d) { |
2410 | v = set_put(other->dependencies[inverse_table[d]], u); | |
2411 | if (v < 0) { | |
5de9682c LP |
2412 | r = v; |
2413 | goto fail; | |
2414 | } | |
613b411c | 2415 | } |
701cc384 LP |
2416 | |
2417 | if (add_reference) { | |
613b411c LP |
2418 | w = set_put(u->dependencies[UNIT_REFERENCES], other); |
2419 | if (w < 0) { | |
701cc384 LP |
2420 | r = w; |
2421 | goto fail; | |
2422 | } | |
2423 | ||
613b411c LP |
2424 | r = set_put(other->dependencies[UNIT_REFERENCED_BY], u); |
2425 | if (r < 0) | |
701cc384 | 2426 | goto fail; |
87f0e418 LP |
2427 | } |
2428 | ||
c1e1601e | 2429 | unit_add_to_dbus_queue(u); |
87f0e418 | 2430 | return 0; |
701cc384 LP |
2431 | |
2432 | fail: | |
2433 | if (q > 0) | |
ac155bb8 | 2434 | set_remove(u->dependencies[d], other); |
701cc384 LP |
2435 | |
2436 | if (v > 0) | |
ac155bb8 | 2437 | set_remove(other->dependencies[inverse_table[d]], u); |
701cc384 LP |
2438 | |
2439 | if (w > 0) | |
ac155bb8 | 2440 | set_remove(u->dependencies[UNIT_REFERENCES], other); |
701cc384 LP |
2441 | |
2442 | return r; | |
87f0e418 | 2443 | } |
0301abf4 | 2444 | |
2c966c03 LP |
2445 | int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference) { |
2446 | int r; | |
2447 | ||
2448 | assert(u); | |
2449 | ||
3f3cc397 LP |
2450 | r = unit_add_dependency(u, d, other, add_reference); |
2451 | if (r < 0) | |
2c966c03 LP |
2452 | return r; |
2453 | ||
7410616c | 2454 | return unit_add_dependency(u, e, other, add_reference); |
2c966c03 LP |
2455 | } |
2456 | ||
7410616c LP |
2457 | static int resolve_template(Unit *u, const char *name, const char*path, char **buf, const char **ret) { |
2458 | int r; | |
9e2f7c11 LP |
2459 | |
2460 | assert(u); | |
2461 | assert(name || path); | |
7410616c LP |
2462 | assert(buf); |
2463 | assert(ret); | |
9e2f7c11 LP |
2464 | |
2465 | if (!name) | |
2b6bf07d | 2466 | name = basename(path); |
9e2f7c11 | 2467 | |
7410616c LP |
2468 | if (!unit_name_is_valid(name, UNIT_NAME_TEMPLATE)) { |
2469 | *buf = NULL; | |
2470 | *ret = name; | |
2471 | return 0; | |
9e2f7c11 LP |
2472 | } |
2473 | ||
ac155bb8 | 2474 | if (u->instance) |
7410616c | 2475 | r = unit_name_replace_instance(name, u->instance, buf); |
9e2f7c11 | 2476 | else { |
ae018d9b | 2477 | _cleanup_free_ char *i = NULL; |
9e2f7c11 | 2478 | |
7410616c LP |
2479 | r = unit_name_to_prefix(u->id, &i); |
2480 | if (r < 0) | |
2481 | return r; | |
9e2f7c11 | 2482 | |
7410616c | 2483 | r = unit_name_replace_instance(name, i, buf); |
9e2f7c11 | 2484 | } |
7410616c LP |
2485 | if (r < 0) |
2486 | return r; | |
9e2f7c11 | 2487 | |
7410616c LP |
2488 | *ret = *buf; |
2489 | return 0; | |
9e2f7c11 LP |
2490 | } |
2491 | ||
701cc384 | 2492 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *path, bool add_reference) { |
7410616c | 2493 | _cleanup_free_ char *buf = NULL; |
09b6b09f LP |
2494 | Unit *other; |
2495 | int r; | |
2496 | ||
9e2f7c11 LP |
2497 | assert(u); |
2498 | assert(name || path); | |
09b6b09f | 2499 | |
7410616c LP |
2500 | r = resolve_template(u, name, path, &buf, &name); |
2501 | if (r < 0) | |
2502 | return r; | |
09b6b09f | 2503 | |
8afbb8e1 LP |
2504 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2505 | if (r < 0) | |
2506 | return r; | |
9e2f7c11 | 2507 | |
8afbb8e1 | 2508 | return unit_add_dependency(u, d, other, add_reference); |
09b6b09f LP |
2509 | } |
2510 | ||
2c966c03 | 2511 | int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference) { |
7410616c | 2512 | _cleanup_free_ char *buf = NULL; |
2c966c03 LP |
2513 | Unit *other; |
2514 | int r; | |
2c966c03 LP |
2515 | |
2516 | assert(u); | |
2517 | assert(name || path); | |
2518 | ||
7410616c LP |
2519 | r = resolve_template(u, name, path, &buf, &name); |
2520 | if (r < 0) | |
2521 | return r; | |
2c966c03 | 2522 | |
3f3cc397 LP |
2523 | r = manager_load_unit(u->manager, name, path, NULL, &other); |
2524 | if (r < 0) | |
68eda4bd | 2525 | return r; |
2c966c03 | 2526 | |
3f3cc397 | 2527 | return unit_add_two_dependencies(u, d, e, other, add_reference); |
2c966c03 LP |
2528 | } |
2529 | ||
0301abf4 | 2530 | int set_unit_path(const char *p) { |
0301abf4 | 2531 | /* This is mostly for debug purposes */ |
cbe46ead | 2532 | if (setenv("SYSTEMD_UNIT_PATH", p, 1) < 0) |
26d04f86 | 2533 | return -errno; |
0301abf4 LP |
2534 | |
2535 | return 0; | |
2536 | } | |
88066b3a | 2537 | |
ea430986 | 2538 | char *unit_dbus_path(Unit *u) { |
ea430986 LP |
2539 | assert(u); |
2540 | ||
ac155bb8 | 2541 | if (!u->id) |
04ade7d2 LP |
2542 | return NULL; |
2543 | ||
48899192 | 2544 | return unit_dbus_path_from_name(u->id); |
ea430986 LP |
2545 | } |
2546 | ||
4b58153d LP |
2547 | char *unit_dbus_path_invocation_id(Unit *u) { |
2548 | assert(u); | |
2549 | ||
2550 | if (sd_id128_is_null(u->invocation_id)) | |
2551 | return NULL; | |
2552 | ||
2553 | return unit_dbus_path_from_name(u->invocation_id_string); | |
2554 | } | |
2555 | ||
d79200e2 LP |
2556 | int unit_set_slice(Unit *u, Unit *slice) { |
2557 | assert(u); | |
2558 | assert(slice); | |
2559 | ||
2560 | /* Sets the unit slice if it has not been set before. Is extra | |
2561 | * careful, to only allow this for units that actually have a | |
2562 | * cgroup context. Also, we don't allow to set this for slices | |
2563 | * (since the parent slice is derived from the name). Make | |
2564 | * sure the unit we set is actually a slice. */ | |
2565 | ||
2566 | if (!UNIT_HAS_CGROUP_CONTEXT(u)) | |
2567 | return -EOPNOTSUPP; | |
2568 | ||
2569 | if (u->type == UNIT_SLICE) | |
2570 | return -EINVAL; | |
2571 | ||
102ef982 LP |
2572 | if (unit_active_state(u) != UNIT_INACTIVE) |
2573 | return -EBUSY; | |
2574 | ||
d79200e2 LP |
2575 | if (slice->type != UNIT_SLICE) |
2576 | return -EINVAL; | |
2577 | ||
efdb0237 LP |
2578 | if (unit_has_name(u, SPECIAL_INIT_SCOPE) && |
2579 | !unit_has_name(slice, SPECIAL_ROOT_SLICE)) | |
2580 | return -EPERM; | |
2581 | ||
d79200e2 LP |
2582 | if (UNIT_DEREF(u->slice) == slice) |
2583 | return 0; | |
2584 | ||
99e66921 TH |
2585 | /* Disallow slice changes if @u is already bound to cgroups */ |
2586 | if (UNIT_ISSET(u->slice) && u->cgroup_realized) | |
d79200e2 LP |
2587 | return -EBUSY; |
2588 | ||
99e66921 | 2589 | unit_ref_unset(&u->slice); |
d79200e2 LP |
2590 | unit_ref_set(&u->slice, slice); |
2591 | return 1; | |
2592 | } | |
2593 | ||
2594 | int unit_set_default_slice(Unit *u) { | |
a8833944 LP |
2595 | _cleanup_free_ char *b = NULL; |
2596 | const char *slice_name; | |
a016b922 LP |
2597 | Unit *slice; |
2598 | int r; | |
2599 | ||
2600 | assert(u); | |
2601 | ||
9444b1f2 | 2602 | if (UNIT_ISSET(u->slice)) |
a016b922 LP |
2603 | return 0; |
2604 | ||
a8833944 LP |
2605 | if (u->instance) { |
2606 | _cleanup_free_ char *prefix = NULL, *escaped = NULL; | |
68eda4bd | 2607 | |
a8833944 LP |
2608 | /* Implicitly place all instantiated units in their |
2609 | * own per-template slice */ | |
2610 | ||
7410616c LP |
2611 | r = unit_name_to_prefix(u->id, &prefix); |
2612 | if (r < 0) | |
2613 | return r; | |
a8833944 LP |
2614 | |
2615 | /* The prefix is already escaped, but it might include | |
2616 | * "-" which has a special meaning for slice units, | |
2617 | * hence escape it here extra. */ | |
7410616c | 2618 | escaped = unit_name_escape(prefix); |
a8833944 LP |
2619 | if (!escaped) |
2620 | return -ENOMEM; | |
2621 | ||
463d0d15 | 2622 | if (MANAGER_IS_SYSTEM(u->manager)) |
605405c6 | 2623 | b = strjoin("system-", escaped, ".slice"); |
a8833944 LP |
2624 | else |
2625 | b = strappend(escaped, ".slice"); | |
2626 | if (!b) | |
2627 | return -ENOMEM; | |
2628 | ||
2629 | slice_name = b; | |
2630 | } else | |
2631 | slice_name = | |
463d0d15 | 2632 | MANAGER_IS_SYSTEM(u->manager) && !unit_has_name(u, SPECIAL_INIT_SCOPE) |
a8833944 LP |
2633 | ? SPECIAL_SYSTEM_SLICE |
2634 | : SPECIAL_ROOT_SLICE; | |
2635 | ||
2636 | r = manager_load_unit(u->manager, slice_name, NULL, NULL, &slice); | |
a016b922 LP |
2637 | if (r < 0) |
2638 | return r; | |
2639 | ||
d79200e2 | 2640 | return unit_set_slice(u, slice); |
a016b922 LP |
2641 | } |
2642 | ||
9444b1f2 LP |
2643 | const char *unit_slice_name(Unit *u) { |
2644 | assert(u); | |
2645 | ||
2646 | if (!UNIT_ISSET(u->slice)) | |
2647 | return NULL; | |
2648 | ||
2649 | return UNIT_DEREF(u->slice)->id; | |
2650 | } | |
2651 | ||
f6ff8c29 | 2652 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
78edb35a | 2653 | _cleanup_free_ char *t = NULL; |
f6ff8c29 LP |
2654 | int r; |
2655 | ||
2656 | assert(u); | |
2657 | assert(type); | |
2658 | assert(_found); | |
2659 | ||
7410616c LP |
2660 | r = unit_name_change_suffix(u->id, type, &t); |
2661 | if (r < 0) | |
2662 | return r; | |
2663 | if (unit_has_name(u, t)) | |
2664 | return -EINVAL; | |
f6ff8c29 | 2665 | |
ac155bb8 | 2666 | r = manager_load_unit(u->manager, t, NULL, NULL, _found); |
9e2f7c11 | 2667 | assert(r < 0 || *_found != u); |
f6ff8c29 LP |
2668 | return r; |
2669 | } | |
2670 | ||
bbc29086 DM |
2671 | static int signal_name_owner_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
2672 | const char *name, *old_owner, *new_owner; | |
2673 | Unit *u = userdata; | |
2674 | int r; | |
2675 | ||
2676 | assert(message); | |
2677 | assert(u); | |
2678 | ||
2679 | r = sd_bus_message_read(message, "sss", &name, &old_owner, &new_owner); | |
2680 | if (r < 0) { | |
2681 | bus_log_parse_error(r); | |
2682 | return 0; | |
2683 | } | |
2684 | ||
b0076268 MK |
2685 | old_owner = isempty(old_owner) ? NULL : old_owner; |
2686 | new_owner = isempty(new_owner) ? NULL : new_owner; | |
2687 | ||
bbc29086 DM |
2688 | if (UNIT_VTABLE(u)->bus_name_owner_change) |
2689 | UNIT_VTABLE(u)->bus_name_owner_change(u, name, old_owner, new_owner); | |
2690 | ||
2691 | return 0; | |
2692 | } | |
2693 | ||
9806e87d LP |
2694 | int unit_install_bus_match(Unit *u, sd_bus *bus, const char *name) { |
2695 | const char *match; | |
bbc29086 | 2696 | |
9806e87d LP |
2697 | assert(u); |
2698 | assert(bus); | |
2699 | assert(name); | |
bbc29086 DM |
2700 | |
2701 | if (u->match_bus_slot) | |
2702 | return -EBUSY; | |
2703 | ||
9806e87d | 2704 | match = strjoina("type='signal'," |
81d62103 ZJS |
2705 | "sender='org.freedesktop.DBus'," |
2706 | "path='/org/freedesktop/DBus'," | |
2707 | "interface='org.freedesktop.DBus'," | |
2708 | "member='NameOwnerChanged'," | |
2709 | "arg0='", name, "'"); | |
bbc29086 DM |
2710 | |
2711 | return sd_bus_add_match(bus, &u->match_bus_slot, match, signal_name_owner_changed, u); | |
2712 | } | |
2713 | ||
05e343b7 | 2714 | int unit_watch_bus_name(Unit *u, const char *name) { |
bbc29086 DM |
2715 | int r; |
2716 | ||
05e343b7 LP |
2717 | assert(u); |
2718 | assert(name); | |
2719 | ||
2720 | /* Watch a specific name on the bus. We only support one unit | |
2721 | * watching each name for now. */ | |
2722 | ||
bbc29086 DM |
2723 | if (u->manager->api_bus) { |
2724 | /* If the bus is already available, install the match directly. | |
2725 | * Otherwise, just put the name in the list. bus_setup_api() will take care later. */ | |
9806e87d | 2726 | r = unit_install_bus_match(u, u->manager->api_bus, name); |
bbc29086 | 2727 | if (r < 0) |
8ea823b6 | 2728 | return log_warning_errno(r, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name); |
bbc29086 DM |
2729 | } |
2730 | ||
2731 | r = hashmap_put(u->manager->watch_bus, name, u); | |
2732 | if (r < 0) { | |
2733 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); | |
2734 | return log_warning_errno(r, "Failed to put bus name to hashmap: %m"); | |
2735 | } | |
2736 | ||
2737 | return 0; | |
05e343b7 LP |
2738 | } |
2739 | ||
2740 | void unit_unwatch_bus_name(Unit *u, const char *name) { | |
2741 | assert(u); | |
2742 | assert(name); | |
2743 | ||
8367fea5 | 2744 | (void) hashmap_remove_value(u->manager->watch_bus, name, u); |
bbc29086 | 2745 | u->match_bus_slot = sd_bus_slot_unref(u->match_bus_slot); |
05e343b7 LP |
2746 | } |
2747 | ||
a16e1123 LP |
2748 | bool unit_can_serialize(Unit *u) { |
2749 | assert(u); | |
2750 | ||
2751 | return UNIT_VTABLE(u)->serialize && UNIT_VTABLE(u)->deserialize_item; | |
2752 | } | |
2753 | ||
8b108bd0 FB |
2754 | static int unit_serialize_cgroup_mask(FILE *f, const char *key, CGroupMask mask) { |
2755 | _cleanup_free_ char *s = NULL; | |
2756 | int r = 0; | |
2757 | ||
2758 | assert(f); | |
2759 | assert(key); | |
2760 | ||
2761 | if (mask != 0) { | |
2762 | r = cg_mask_to_string(mask, &s); | |
2763 | if (r >= 0) { | |
2764 | fputs(key, f); | |
2765 | fputc('=', f); | |
2766 | fputs(s, f); | |
2767 | fputc('\n', f); | |
2768 | } | |
2769 | } | |
2770 | return r; | |
2771 | } | |
2772 | ||
6b78f9b4 | 2773 | int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs) { |
a16e1123 LP |
2774 | int r; |
2775 | ||
2776 | assert(u); | |
2777 | assert(f); | |
2778 | assert(fds); | |
2779 | ||
9bdb98c5 LP |
2780 | if (unit_can_serialize(u)) { |
2781 | ExecRuntime *rt; | |
a16e1123 | 2782 | |
9bdb98c5 | 2783 | r = UNIT_VTABLE(u)->serialize(u, f, fds); |
613b411c LP |
2784 | if (r < 0) |
2785 | return r; | |
9bdb98c5 LP |
2786 | |
2787 | rt = unit_get_exec_runtime(u); | |
2788 | if (rt) { | |
f2341e0a | 2789 | r = exec_runtime_serialize(u, rt, f, fds); |
9bdb98c5 LP |
2790 | if (r < 0) |
2791 | return r; | |
2792 | } | |
e0209d83 MS |
2793 | } |
2794 | ||
a483fb59 LP |
2795 | dual_timestamp_serialize(f, "state-change-timestamp", &u->state_change_timestamp); |
2796 | ||
ac155bb8 MS |
2797 | dual_timestamp_serialize(f, "inactive-exit-timestamp", &u->inactive_exit_timestamp); |
2798 | dual_timestamp_serialize(f, "active-enter-timestamp", &u->active_enter_timestamp); | |
2799 | dual_timestamp_serialize(f, "active-exit-timestamp", &u->active_exit_timestamp); | |
2800 | dual_timestamp_serialize(f, "inactive-enter-timestamp", &u->inactive_enter_timestamp); | |
a483fb59 | 2801 | |
ac155bb8 | 2802 | dual_timestamp_serialize(f, "condition-timestamp", &u->condition_timestamp); |
59fccdc5 | 2803 | dual_timestamp_serialize(f, "assert-timestamp", &u->assert_timestamp); |
2791a8f8 | 2804 | |
ac155bb8 MS |
2805 | if (dual_timestamp_is_set(&u->condition_timestamp)) |
2806 | unit_serialize_item(u, f, "condition-result", yes_no(u->condition_result)); | |
10717a1a | 2807 | |
59fccdc5 LP |
2808 | if (dual_timestamp_is_set(&u->assert_timestamp)) |
2809 | unit_serialize_item(u, f, "assert-result", yes_no(u->assert_result)); | |
2810 | ||
c2756a68 | 2811 | unit_serialize_item(u, f, "transient", yes_no(u->transient)); |
fe700f46 | 2812 | |
66ebf6c0 | 2813 | unit_serialize_item_format(u, f, "cpu-usage-base", "%" PRIu64, u->cpu_usage_base); |
fe700f46 LP |
2814 | if (u->cpu_usage_last != NSEC_INFINITY) |
2815 | unit_serialize_item_format(u, f, "cpu-usage-last", "%" PRIu64, u->cpu_usage_last); | |
c2756a68 LP |
2816 | |
2817 | if (u->cgroup_path) | |
2818 | unit_serialize_item(u, f, "cgroup", u->cgroup_path); | |
de1d4f9b | 2819 | unit_serialize_item(u, f, "cgroup-realized", yes_no(u->cgroup_realized)); |
8b108bd0 FB |
2820 | (void) unit_serialize_cgroup_mask(f, "cgroup-realized-mask", u->cgroup_realized_mask); |
2821 | (void) unit_serialize_cgroup_mask(f, "cgroup-enabled-mask", u->cgroup_enabled_mask); | |
906c06f6 | 2822 | unit_serialize_item_format(u, f, "cgroup-bpf-realized", "%i", u->cgroup_bpf_state); |
c2756a68 | 2823 | |
00d9ef85 LP |
2824 | if (uid_is_valid(u->ref_uid)) |
2825 | unit_serialize_item_format(u, f, "ref-uid", UID_FMT, u->ref_uid); | |
2826 | if (gid_is_valid(u->ref_gid)) | |
2827 | unit_serialize_item_format(u, f, "ref-gid", GID_FMT, u->ref_gid); | |
2828 | ||
4b58153d LP |
2829 | if (!sd_id128_is_null(u->invocation_id)) |
2830 | unit_serialize_item_format(u, f, "invocation-id", SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(u->invocation_id)); | |
2831 | ||
05a98afd LP |
2832 | bus_track_serialize(u->bus_track, f, "ref"); |
2833 | ||
613b411c LP |
2834 | if (serialize_jobs) { |
2835 | if (u->job) { | |
2836 | fprintf(f, "job\n"); | |
05a98afd | 2837 | job_serialize(u->job, f); |
613b411c LP |
2838 | } |
2839 | ||
2840 | if (u->nop_job) { | |
2841 | fprintf(f, "job\n"); | |
05a98afd | 2842 | job_serialize(u->nop_job, f); |
613b411c LP |
2843 | } |
2844 | } | |
2845 | ||
a16e1123 LP |
2846 | /* End marker */ |
2847 | fputc('\n', f); | |
2848 | return 0; | |
2849 | } | |
2850 | ||
a34ceba6 LP |
2851 | int unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value) { |
2852 | assert(u); | |
2853 | assert(f); | |
2854 | assert(key); | |
2855 | ||
2856 | if (!value) | |
2857 | return 0; | |
2858 | ||
2859 | fputs(key, f); | |
2860 | fputc('=', f); | |
2861 | fputs(value, f); | |
2862 | fputc('\n', f); | |
2863 | ||
2864 | return 1; | |
2865 | } | |
2866 | ||
2867 | int unit_serialize_item_escaped(Unit *u, FILE *f, const char *key, const char *value) { | |
2868 | _cleanup_free_ char *c = NULL; | |
2869 | ||
2870 | assert(u); | |
2871 | assert(f); | |
2872 | assert(key); | |
2873 | ||
2874 | if (!value) | |
2875 | return 0; | |
2876 | ||
2877 | c = cescape(value); | |
2878 | if (!c) | |
2879 | return -ENOMEM; | |
2880 | ||
2881 | fputs(key, f); | |
2882 | fputc('=', f); | |
2883 | fputs(c, f); | |
2884 | fputc('\n', f); | |
2885 | ||
2886 | return 1; | |
2887 | } | |
2888 | ||
2889 | int unit_serialize_item_fd(Unit *u, FILE *f, FDSet *fds, const char *key, int fd) { | |
2890 | int copy; | |
2891 | ||
2892 | assert(u); | |
2893 | assert(f); | |
2894 | assert(key); | |
2895 | ||
2896 | if (fd < 0) | |
2897 | return 0; | |
2898 | ||
2899 | copy = fdset_put_dup(fds, fd); | |
2900 | if (copy < 0) | |
2901 | return copy; | |
2902 | ||
2903 | fprintf(f, "%s=%i\n", key, copy); | |
2904 | return 1; | |
2905 | } | |
2906 | ||
a16e1123 LP |
2907 | void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *format, ...) { |
2908 | va_list ap; | |
2909 | ||
2910 | assert(u); | |
2911 | assert(f); | |
2912 | assert(key); | |
2913 | assert(format); | |
2914 | ||
2915 | fputs(key, f); | |
2916 | fputc('=', f); | |
2917 | ||
2918 | va_start(ap, format); | |
2919 | vfprintf(f, format, ap); | |
2920 | va_end(ap); | |
2921 | ||
2922 | fputc('\n', f); | |
2923 | } | |
2924 | ||
a16e1123 | 2925 | int unit_deserialize(Unit *u, FILE *f, FDSet *fds) { |
28b99ccd | 2926 | ExecRuntime **rt = NULL; |
9bdb98c5 | 2927 | size_t offset; |
a16e1123 LP |
2928 | int r; |
2929 | ||
2930 | assert(u); | |
2931 | assert(f); | |
2932 | assert(fds); | |
2933 | ||
613b411c LP |
2934 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
2935 | if (offset > 0) | |
2936 | rt = (ExecRuntime**) ((uint8_t*) u + offset); | |
2937 | ||
a16e1123 | 2938 | for (;;) { |
20c03b7b | 2939 | char line[LINE_MAX], *l, *v; |
a16e1123 LP |
2940 | size_t k; |
2941 | ||
2942 | if (!fgets(line, sizeof(line), f)) { | |
2943 | if (feof(f)) | |
2944 | return 0; | |
2945 | return -errno; | |
2946 | } | |
2947 | ||
10f8e83c | 2948 | char_array_0(line); |
a16e1123 LP |
2949 | l = strstrip(line); |
2950 | ||
2951 | /* End marker */ | |
e911de99 | 2952 | if (isempty(l)) |
a483fb59 | 2953 | break; |
a16e1123 LP |
2954 | |
2955 | k = strcspn(l, "="); | |
2956 | ||
2957 | if (l[k] == '=') { | |
2958 | l[k] = 0; | |
2959 | v = l+k+1; | |
2960 | } else | |
2961 | v = l+k; | |
2962 | ||
cca098b0 | 2963 | if (streq(l, "job")) { |
39a18c60 MS |
2964 | if (v[0] == '\0') { |
2965 | /* new-style serialized job */ | |
9c3349e2 LP |
2966 | Job *j; |
2967 | ||
2968 | j = job_new_raw(u); | |
39a18c60 | 2969 | if (!j) |
e911de99 | 2970 | return log_oom(); |
39a18c60 | 2971 | |
05a98afd | 2972 | r = job_deserialize(j, f); |
39a18c60 MS |
2973 | if (r < 0) { |
2974 | job_free(j); | |
2975 | return r; | |
2976 | } | |
cca098b0 | 2977 | |
39a18c60 MS |
2978 | r = hashmap_put(u->manager->jobs, UINT32_TO_PTR(j->id), j); |
2979 | if (r < 0) { | |
2980 | job_free(j); | |
2981 | return r; | |
2982 | } | |
e0209d83 MS |
2983 | |
2984 | r = job_install_deserialized(j); | |
2985 | if (r < 0) { | |
2986 | hashmap_remove(u->manager->jobs, UINT32_TO_PTR(j->id)); | |
2987 | job_free(j); | |
2988 | return r; | |
2989 | } | |
ed10fa8c LP |
2990 | } else /* legacy for pre-44 */ |
2991 | log_unit_warning(u, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v); | |
cca098b0 | 2992 | continue; |
a483fb59 LP |
2993 | } else if (streq(l, "state-change-timestamp")) { |
2994 | dual_timestamp_deserialize(v, &u->state_change_timestamp); | |
2995 | continue; | |
8aaf019b | 2996 | } else if (streq(l, "inactive-exit-timestamp")) { |
ac155bb8 | 2997 | dual_timestamp_deserialize(v, &u->inactive_exit_timestamp); |
8aaf019b LP |
2998 | continue; |
2999 | } else if (streq(l, "active-enter-timestamp")) { | |
ac155bb8 | 3000 | dual_timestamp_deserialize(v, &u->active_enter_timestamp); |
8aaf019b LP |
3001 | continue; |
3002 | } else if (streq(l, "active-exit-timestamp")) { | |
ac155bb8 | 3003 | dual_timestamp_deserialize(v, &u->active_exit_timestamp); |
8aaf019b LP |
3004 | continue; |
3005 | } else if (streq(l, "inactive-enter-timestamp")) { | |
ac155bb8 | 3006 | dual_timestamp_deserialize(v, &u->inactive_enter_timestamp); |
8aaf019b | 3007 | continue; |
2791a8f8 | 3008 | } else if (streq(l, "condition-timestamp")) { |
ac155bb8 | 3009 | dual_timestamp_deserialize(v, &u->condition_timestamp); |
2791a8f8 | 3010 | continue; |
59fccdc5 LP |
3011 | } else if (streq(l, "assert-timestamp")) { |
3012 | dual_timestamp_deserialize(v, &u->assert_timestamp); | |
3013 | continue; | |
2791a8f8 | 3014 | } else if (streq(l, "condition-result")) { |
2791a8f8 | 3015 | |
e911de99 LP |
3016 | r = parse_boolean(v); |
3017 | if (r < 0) | |
f2341e0a | 3018 | log_unit_debug(u, "Failed to parse condition result value %s, ignoring.", v); |
2791a8f8 | 3019 | else |
e911de99 | 3020 | u->condition_result = r; |
efbac6d2 LP |
3021 | |
3022 | continue; | |
c2756a68 | 3023 | |
59fccdc5 | 3024 | } else if (streq(l, "assert-result")) { |
59fccdc5 | 3025 | |
e911de99 LP |
3026 | r = parse_boolean(v); |
3027 | if (r < 0) | |
f2341e0a | 3028 | log_unit_debug(u, "Failed to parse assert result value %s, ignoring.", v); |
59fccdc5 | 3029 | else |
e911de99 | 3030 | u->assert_result = r; |
59fccdc5 LP |
3031 | |
3032 | continue; | |
3033 | ||
c2756a68 | 3034 | } else if (streq(l, "transient")) { |
c2756a68 | 3035 | |
e911de99 LP |
3036 | r = parse_boolean(v); |
3037 | if (r < 0) | |
f2341e0a | 3038 | log_unit_debug(u, "Failed to parse transient bool %s, ignoring.", v); |
c2756a68 | 3039 | else |
e911de99 | 3040 | u->transient = r; |
c2756a68 LP |
3041 | |
3042 | continue; | |
e911de99 | 3043 | |
fe700f46 | 3044 | } else if (STR_IN_SET(l, "cpu-usage-base", "cpuacct-usage-base")) { |
5ad096b3 | 3045 | |
66ebf6c0 | 3046 | r = safe_atou64(v, &u->cpu_usage_base); |
5ad096b3 | 3047 | if (r < 0) |
fe700f46 LP |
3048 | log_unit_debug(u, "Failed to parse CPU usage base %s, ignoring.", v); |
3049 | ||
3050 | continue; | |
3051 | ||
3052 | } else if (streq(l, "cpu-usage-last")) { | |
3053 | ||
3054 | r = safe_atou64(v, &u->cpu_usage_last); | |
3055 | if (r < 0) | |
3056 | log_unit_debug(u, "Failed to read CPU usage last %s, ignoring.", v); | |
5ad096b3 | 3057 | |
0f908397 | 3058 | continue; |
4e595329 | 3059 | |
e911de99 | 3060 | } else if (streq(l, "cgroup")) { |
72673e86 | 3061 | |
e911de99 LP |
3062 | r = unit_set_cgroup_path(u, v); |
3063 | if (r < 0) | |
f2341e0a | 3064 | log_unit_debug_errno(u, r, "Failed to set cgroup path %s, ignoring: %m", v); |
4e595329 | 3065 | |
efdb0237 LP |
3066 | (void) unit_watch_cgroup(u); |
3067 | ||
de1d4f9b WF |
3068 | continue; |
3069 | } else if (streq(l, "cgroup-realized")) { | |
3070 | int b; | |
3071 | ||
3072 | b = parse_boolean(v); | |
3073 | if (b < 0) | |
3074 | log_unit_debug(u, "Failed to parse cgroup-realized bool %s, ignoring.", v); | |
3075 | else | |
3076 | u->cgroup_realized = b; | |
3077 | ||
c2756a68 | 3078 | continue; |
00d9ef85 | 3079 | |
8b108bd0 FB |
3080 | } else if (streq(l, "cgroup-realized-mask")) { |
3081 | ||
3082 | r = cg_mask_from_string(v, &u->cgroup_realized_mask); | |
3083 | if (r < 0) | |
3084 | log_unit_debug(u, "Failed to parse cgroup-realized-mask %s, ignoring.", v); | |
3085 | continue; | |
3086 | ||
3087 | } else if (streq(l, "cgroup-enabled-mask")) { | |
3088 | ||
3089 | r = cg_mask_from_string(v, &u->cgroup_enabled_mask); | |
3090 | if (r < 0) | |
3091 | log_unit_debug(u, "Failed to parse cgroup-enabled-mask %s, ignoring.", v); | |
3092 | continue; | |
3093 | ||
906c06f6 DM |
3094 | } else if (streq(l, "cgroup-bpf-realized")) { |
3095 | int i; | |
3096 | ||
3097 | r = safe_atoi(v, &i); | |
3098 | if (r < 0) | |
3099 | log_unit_debug(u, "Failed to parse cgroup BPF state %s, ignoring.", v); | |
3100 | else | |
3101 | u->cgroup_bpf_state = | |
3102 | i < 0 ? UNIT_CGROUP_BPF_INVALIDATED : | |
3103 | i > 0 ? UNIT_CGROUP_BPF_ON : | |
3104 | UNIT_CGROUP_BPF_OFF; | |
3105 | ||
3106 | continue; | |
3107 | ||
00d9ef85 LP |
3108 | } else if (streq(l, "ref-uid")) { |
3109 | uid_t uid; | |
3110 | ||
3111 | r = parse_uid(v, &uid); | |
3112 | if (r < 0) | |
3113 | log_unit_debug(u, "Failed to parse referenced UID %s, ignoring.", v); | |
3114 | else | |
3115 | unit_ref_uid_gid(u, uid, GID_INVALID); | |
3116 | ||
3117 | continue; | |
3118 | ||
3119 | } else if (streq(l, "ref-gid")) { | |
3120 | gid_t gid; | |
3121 | ||
3122 | r = parse_gid(v, &gid); | |
3123 | if (r < 0) | |
3124 | log_unit_debug(u, "Failed to parse referenced GID %s, ignoring.", v); | |
3125 | else | |
3126 | unit_ref_uid_gid(u, UID_INVALID, gid); | |
3127 | ||
05a98afd LP |
3128 | } else if (streq(l, "ref")) { |
3129 | ||
3130 | r = strv_extend(&u->deserialized_refs, v); | |
3131 | if (r < 0) | |
3132 | log_oom(); | |
3133 | ||
4b58153d LP |
3134 | continue; |
3135 | } else if (streq(l, "invocation-id")) { | |
3136 | sd_id128_t id; | |
3137 | ||
3138 | r = sd_id128_from_string(v, &id); | |
3139 | if (r < 0) | |
3140 | log_unit_debug(u, "Failed to parse invocation id %s, ignoring.", v); | |
3141 | else { | |
3142 | r = unit_set_invocation_id(u, id); | |
3143 | if (r < 0) | |
3144 | log_unit_warning_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
3145 | } | |
3146 | ||
00d9ef85 | 3147 | continue; |
8aaf019b | 3148 | } |
cca098b0 | 3149 | |
9bdb98c5 LP |
3150 | if (unit_can_serialize(u)) { |
3151 | if (rt) { | |
f2341e0a | 3152 | r = exec_runtime_deserialize_item(u, rt, l, v, fds); |
e911de99 | 3153 | if (r < 0) { |
f2341e0a | 3154 | log_unit_warning(u, "Failed to deserialize runtime parameter '%s', ignoring.", l); |
e911de99 LP |
3155 | continue; |
3156 | } | |
3157 | ||
3158 | /* Returns positive if key was handled by the call */ | |
9bdb98c5 LP |
3159 | if (r > 0) |
3160 | continue; | |
3161 | } | |
3162 | ||
3163 | r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds); | |
613b411c | 3164 | if (r < 0) |
f2341e0a | 3165 | log_unit_warning(u, "Failed to deserialize unit parameter '%s', ignoring.", l); |
613b411c | 3166 | } |
a16e1123 | 3167 | } |
a483fb59 LP |
3168 | |
3169 | /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is | |
3170 | * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from | |
1f133e0d | 3171 | * before 228 where the base for timeouts was not persistent across reboots. */ |
a483fb59 LP |
3172 | |
3173 | if (!dual_timestamp_is_set(&u->state_change_timestamp)) | |
3174 | dual_timestamp_get(&u->state_change_timestamp); | |
3175 | ||
3176 | return 0; | |
a16e1123 LP |
3177 | } |
3178 | ||
07429866 ZJS |
3179 | void unit_deserialize_skip(FILE *f) { |
3180 | assert(f); | |
3181 | ||
3182 | /* Skip serialized data for this unit. We don't know what it is. */ | |
3183 | ||
3184 | for (;;) { | |
3185 | char line[LINE_MAX], *l; | |
3186 | ||
3187 | if (!fgets(line, sizeof line, f)) | |
3188 | return; | |
3189 | ||
3190 | char_array_0(line); | |
3191 | l = strstrip(line); | |
3192 | ||
3193 | /* End marker */ | |
3194 | if (isempty(l)) | |
3195 | return; | |
3196 | } | |
3197 | } | |
3198 | ||
3199 | ||
9d06297e | 3200 | int unit_add_node_link(Unit *u, const char *what, bool wants, UnitDependency dep) { |
6e2ef85b | 3201 | Unit *device; |
68eda4bd | 3202 | _cleanup_free_ char *e = NULL; |
6e2ef85b LP |
3203 | int r; |
3204 | ||
3205 | assert(u); | |
3206 | ||
6e2ef85b | 3207 | /* Adds in links to the device node that this unit is based on */ |
47bc12e1 LP |
3208 | if (isempty(what)) |
3209 | return 0; | |
6e2ef85b | 3210 | |
8407a5d0 | 3211 | if (!is_device_path(what)) |
6e2ef85b LP |
3212 | return 0; |
3213 | ||
47bc12e1 LP |
3214 | /* When device units aren't supported (such as in a |
3215 | * container), don't create dependencies on them. */ | |
1c2e9646 | 3216 | if (!unit_type_supported(UNIT_DEVICE)) |
47bc12e1 LP |
3217 | return 0; |
3218 | ||
7410616c LP |
3219 | r = unit_name_from_path(what, ".device", &e); |
3220 | if (r < 0) | |
3221 | return r; | |
6e2ef85b | 3222 | |
ac155bb8 | 3223 | r = manager_load_unit(u->manager, e, NULL, NULL, &device); |
6e2ef85b LP |
3224 | if (r < 0) |
3225 | return r; | |
3226 | ||
ebc8968b FB |
3227 | if (dep == UNIT_REQUIRES && device_shall_be_bound_by(device, u)) |
3228 | dep = UNIT_BINDS_TO; | |
3229 | ||
9d06297e | 3230 | r = unit_add_two_dependencies(u, UNIT_AFTER, |
463d0d15 | 3231 | MANAGER_IS_SYSTEM(u->manager) ? dep : UNIT_WANTS, |
9d06297e | 3232 | device, true); |
faa368e3 | 3233 | if (r < 0) |
6e2ef85b LP |
3234 | return r; |
3235 | ||
faa368e3 LP |
3236 | if (wants) { |
3237 | r = unit_add_dependency(device, UNIT_WANTS, u, false); | |
3238 | if (r < 0) | |
6e2ef85b | 3239 | return r; |
faa368e3 | 3240 | } |
6e2ef85b LP |
3241 | |
3242 | return 0; | |
3243 | } | |
a16e1123 | 3244 | |
be847e82 | 3245 | int unit_coldplug(Unit *u) { |
05a98afd LP |
3246 | int r = 0, q; |
3247 | char **i; | |
cca098b0 LP |
3248 | |
3249 | assert(u); | |
3250 | ||
f78f265f LP |
3251 | /* Make sure we don't enter a loop, when coldplugging |
3252 | * recursively. */ | |
3253 | if (u->coldplugged) | |
3254 | return 0; | |
3255 | ||
3256 | u->coldplugged = true; | |
3257 | ||
05a98afd LP |
3258 | STRV_FOREACH(i, u->deserialized_refs) { |
3259 | q = bus_unit_track_add_name(u, *i); | |
3260 | if (q < 0 && r >= 0) | |
3261 | r = q; | |
3262 | } | |
3263 | u->deserialized_refs = strv_free(u->deserialized_refs); | |
cca098b0 | 3264 | |
05a98afd LP |
3265 | if (UNIT_VTABLE(u)->coldplug) { |
3266 | q = UNIT_VTABLE(u)->coldplug(u); | |
3267 | if (q < 0 && r >= 0) | |
3268 | r = q; | |
3269 | } | |
5a6158b6 | 3270 | |
05a98afd LP |
3271 | if (u->job) { |
3272 | q = job_coldplug(u->job); | |
3273 | if (q < 0 && r >= 0) | |
3274 | r = q; | |
3275 | } | |
cca098b0 | 3276 | |
05a98afd | 3277 | return r; |
cca098b0 LP |
3278 | } |
3279 | ||
ba25d39e | 3280 | static bool fragment_mtime_newer(const char *path, usec_t mtime, bool path_masked) { |
21b95806 ZJS |
3281 | struct stat st; |
3282 | ||
3283 | if (!path) | |
3284 | return false; | |
3285 | ||
77969722 LP |
3286 | /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we |
3287 | * are never out-of-date. */ | |
3288 | if (PATH_STARTSWITH_SET(path, "/proc", "/sys")) | |
3289 | return false; | |
3290 | ||
21b95806 ZJS |
3291 | if (stat(path, &st) < 0) |
3292 | /* What, cannot access this anymore? */ | |
3293 | return true; | |
3294 | ||
ba25d39e ZJS |
3295 | if (path_masked) |
3296 | /* For masked files check if they are still so */ | |
3297 | return !null_or_empty(&st); | |
3298 | else | |
3a8db9fe | 3299 | /* For non-empty files check the mtime */ |
87ec20ef | 3300 | return timespec_load(&st.st_mtim) > mtime; |
21b95806 ZJS |
3301 | |
3302 | return false; | |
3303 | } | |
3304 | ||
45fb0699 | 3305 | bool unit_need_daemon_reload(Unit *u) { |
ae7a7182 OS |
3306 | _cleanup_strv_free_ char **t = NULL; |
3307 | char **path; | |
1b64d026 | 3308 | |
45fb0699 LP |
3309 | assert(u); |
3310 | ||
ba25d39e ZJS |
3311 | /* For unit files, we allow masking… */ |
3312 | if (fragment_mtime_newer(u->fragment_path, u->fragment_mtime, | |
3313 | u->load_state == UNIT_MASKED)) | |
21b95806 | 3314 | return true; |
5f4b19f4 | 3315 | |
ba25d39e ZJS |
3316 | /* Source paths should not be masked… */ |
3317 | if (fragment_mtime_newer(u->source_path, u->source_mtime, false)) | |
ab932a62 | 3318 | return true; |
ae7a7182 | 3319 | |
ab932a62 LP |
3320 | (void) unit_find_dropin_paths(u, &t); |
3321 | if (!strv_equal(u->dropin_paths, t)) | |
3322 | return true; | |
6d10d308 | 3323 | |
ba25d39e | 3324 | /* … any drop-ins that are masked are simply omitted from the list. */ |
ab932a62 | 3325 | STRV_FOREACH(path, u->dropin_paths) |
ba25d39e | 3326 | if (fragment_mtime_newer(*path, u->dropin_mtime, false)) |
ab932a62 | 3327 | return true; |
21b95806 | 3328 | |
ab932a62 | 3329 | return false; |
45fb0699 LP |
3330 | } |
3331 | ||
fdf20a31 | 3332 | void unit_reset_failed(Unit *u) { |
5632e374 LP |
3333 | assert(u); |
3334 | ||
fdf20a31 MM |
3335 | if (UNIT_VTABLE(u)->reset_failed) |
3336 | UNIT_VTABLE(u)->reset_failed(u); | |
6bf0f408 LP |
3337 | |
3338 | RATELIMIT_RESET(u->start_limit); | |
3339 | u->start_limit_hit = false; | |
5632e374 LP |
3340 | } |
3341 | ||
a7f241db LP |
3342 | Unit *unit_following(Unit *u) { |
3343 | assert(u); | |
3344 | ||
3345 | if (UNIT_VTABLE(u)->following) | |
3346 | return UNIT_VTABLE(u)->following(u); | |
3347 | ||
3348 | return NULL; | |
3349 | } | |
3350 | ||
31afa0a4 | 3351 | bool unit_stop_pending(Unit *u) { |
18ffdfda LP |
3352 | assert(u); |
3353 | ||
31afa0a4 LP |
3354 | /* This call does check the current state of the unit. It's |
3355 | * hence useful to be called from state change calls of the | |
3356 | * unit itself, where the state isn't updated yet. This is | |
3357 | * different from unit_inactive_or_pending() which checks both | |
3358 | * the current state and for a queued job. */ | |
18ffdfda | 3359 | |
31afa0a4 LP |
3360 | return u->job && u->job->type == JOB_STOP; |
3361 | } | |
3362 | ||
3363 | bool unit_inactive_or_pending(Unit *u) { | |
3364 | assert(u); | |
3365 | ||
3366 | /* Returns true if the unit is inactive or going down */ | |
18ffdfda | 3367 | |
d956ac29 LP |
3368 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))) |
3369 | return true; | |
3370 | ||
31afa0a4 | 3371 | if (unit_stop_pending(u)) |
18ffdfda LP |
3372 | return true; |
3373 | ||
3374 | return false; | |
3375 | } | |
3376 | ||
31afa0a4 | 3377 | bool unit_active_or_pending(Unit *u) { |
f976f3f6 LP |
3378 | assert(u); |
3379 | ||
f60c2665 | 3380 | /* Returns true if the unit is active or going up */ |
f976f3f6 LP |
3381 | |
3382 | if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
3383 | return true; | |
3384 | ||
ac155bb8 MS |
3385 | if (u->job && |
3386 | (u->job->type == JOB_START || | |
3387 | u->job->type == JOB_RELOAD_OR_START || | |
3388 | u->job->type == JOB_RESTART)) | |
f976f3f6 LP |
3389 | return true; |
3390 | ||
3391 | return false; | |
3392 | } | |
3393 | ||
718db961 | 3394 | int unit_kill(Unit *u, KillWho w, int signo, sd_bus_error *error) { |
8a0867d6 LP |
3395 | assert(u); |
3396 | assert(w >= 0 && w < _KILL_WHO_MAX); | |
6eb7c172 | 3397 | assert(SIGNAL_VALID(signo)); |
8a0867d6 | 3398 | |
8a0867d6 | 3399 | if (!UNIT_VTABLE(u)->kill) |
15411c0c | 3400 | return -EOPNOTSUPP; |
8a0867d6 | 3401 | |
c74f17d9 | 3402 | return UNIT_VTABLE(u)->kill(u, w, signo, error); |
8a0867d6 LP |
3403 | } |
3404 | ||
82659fd7 LP |
3405 | static Set *unit_pid_set(pid_t main_pid, pid_t control_pid) { |
3406 | Set *pid_set; | |
3407 | int r; | |
3408 | ||
d5099efc | 3409 | pid_set = set_new(NULL); |
82659fd7 LP |
3410 | if (!pid_set) |
3411 | return NULL; | |
3412 | ||
3413 | /* Exclude the main/control pids from being killed via the cgroup */ | |
3414 | if (main_pid > 0) { | |
fea72cc0 | 3415 | r = set_put(pid_set, PID_TO_PTR(main_pid)); |
82659fd7 LP |
3416 | if (r < 0) |
3417 | goto fail; | |
3418 | } | |
3419 | ||
3420 | if (control_pid > 0) { | |
fea72cc0 | 3421 | r = set_put(pid_set, PID_TO_PTR(control_pid)); |
82659fd7 LP |
3422 | if (r < 0) |
3423 | goto fail; | |
3424 | } | |
3425 | ||
3426 | return pid_set; | |
3427 | ||
3428 | fail: | |
3429 | set_free(pid_set); | |
3430 | return NULL; | |
3431 | } | |
3432 | ||
d91c34f2 LP |
3433 | int unit_kill_common( |
3434 | Unit *u, | |
3435 | KillWho who, | |
3436 | int signo, | |
3437 | pid_t main_pid, | |
3438 | pid_t control_pid, | |
718db961 | 3439 | sd_bus_error *error) { |
d91c34f2 | 3440 | |
814cc562 | 3441 | int r = 0; |
ac5e3a50 | 3442 | bool killed = false; |
814cc562 | 3443 | |
ac5e3a50 | 3444 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL)) { |
814cc562 | 3445 | if (main_pid < 0) |
7358dc02 | 3446 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no main processes", unit_type_to_string(u->type)); |
52f448c3 | 3447 | else if (main_pid == 0) |
7358dc02 | 3448 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill"); |
814cc562 MS |
3449 | } |
3450 | ||
ac5e3a50 | 3451 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL)) { |
814cc562 | 3452 | if (control_pid < 0) |
7358dc02 | 3453 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_PROCESS, "%s units have no control processes", unit_type_to_string(u->type)); |
52f448c3 | 3454 | else if (control_pid == 0) |
7358dc02 | 3455 | return sd_bus_error_set_const(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill"); |
814cc562 MS |
3456 | } |
3457 | ||
ac5e3a50 JS |
3458 | if (IN_SET(who, KILL_CONTROL, KILL_CONTROL_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3459 | if (control_pid > 0) { | |
814cc562 MS |
3460 | if (kill(control_pid, signo) < 0) |
3461 | r = -errno; | |
ac5e3a50 JS |
3462 | else |
3463 | killed = true; | |
3464 | } | |
814cc562 | 3465 | |
ac5e3a50 JS |
3466 | if (IN_SET(who, KILL_MAIN, KILL_MAIN_FAIL, KILL_ALL, KILL_ALL_FAIL)) |
3467 | if (main_pid > 0) { | |
814cc562 MS |
3468 | if (kill(main_pid, signo) < 0) |
3469 | r = -errno; | |
ac5e3a50 JS |
3470 | else |
3471 | killed = true; | |
3472 | } | |
814cc562 | 3473 | |
ac5e3a50 | 3474 | if (IN_SET(who, KILL_ALL, KILL_ALL_FAIL) && u->cgroup_path) { |
814cc562 MS |
3475 | _cleanup_set_free_ Set *pid_set = NULL; |
3476 | int q; | |
3477 | ||
82659fd7 LP |
3478 | /* Exclude the main/control pids from being killed via the cgroup */ |
3479 | pid_set = unit_pid_set(main_pid, control_pid); | |
814cc562 MS |
3480 | if (!pid_set) |
3481 | return -ENOMEM; | |
3482 | ||
1d98fef1 | 3483 | q = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, signo, 0, pid_set, NULL, NULL); |
814cc562 MS |
3484 | if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT) |
3485 | r = q; | |
ac5e3a50 JS |
3486 | else |
3487 | killed = true; | |
814cc562 MS |
3488 | } |
3489 | ||
201f0c91 | 3490 | if (r == 0 && !killed && IN_SET(who, KILL_ALL_FAIL, KILL_CONTROL_FAIL)) |
ac5e3a50 JS |
3491 | return -ESRCH; |
3492 | ||
814cc562 MS |
3493 | return r; |
3494 | } | |
3495 | ||
6210e7fc LP |
3496 | int unit_following_set(Unit *u, Set **s) { |
3497 | assert(u); | |
3498 | assert(s); | |
3499 | ||
3500 | if (UNIT_VTABLE(u)->following_set) | |
3501 | return UNIT_VTABLE(u)->following_set(u, s); | |
3502 | ||
3503 | *s = NULL; | |
3504 | return 0; | |
3505 | } | |
3506 | ||
a4375746 | 3507 | UnitFileState unit_get_unit_file_state(Unit *u) { |
0ec0deaa LP |
3508 | int r; |
3509 | ||
a4375746 LP |
3510 | assert(u); |
3511 | ||
0ec0deaa LP |
3512 | if (u->unit_file_state < 0 && u->fragment_path) { |
3513 | r = unit_file_get_state( | |
463d0d15 | 3514 | u->manager->unit_file_scope, |
0ec0deaa LP |
3515 | NULL, |
3516 | basename(u->fragment_path), | |
3517 | &u->unit_file_state); | |
3518 | if (r < 0) | |
3519 | u->unit_file_state = UNIT_FILE_BAD; | |
3520 | } | |
a4375746 | 3521 | |
ac155bb8 | 3522 | return u->unit_file_state; |
a4375746 LP |
3523 | } |
3524 | ||
d2dc52db LP |
3525 | int unit_get_unit_file_preset(Unit *u) { |
3526 | assert(u); | |
3527 | ||
3528 | if (u->unit_file_preset < 0 && u->fragment_path) | |
3529 | u->unit_file_preset = unit_file_query_preset( | |
463d0d15 | 3530 | u->manager->unit_file_scope, |
0ec0deaa LP |
3531 | NULL, |
3532 | basename(u->fragment_path)); | |
d2dc52db LP |
3533 | |
3534 | return u->unit_file_preset; | |
3535 | } | |
3536 | ||
57020a3a LP |
3537 | Unit* unit_ref_set(UnitRef *ref, Unit *u) { |
3538 | assert(ref); | |
3539 | assert(u); | |
3540 | ||
3541 | if (ref->unit) | |
3542 | unit_ref_unset(ref); | |
3543 | ||
3544 | ref->unit = u; | |
71fda00f | 3545 | LIST_PREPEND(refs, u->refs, ref); |
57020a3a LP |
3546 | return u; |
3547 | } | |
3548 | ||
3549 | void unit_ref_unset(UnitRef *ref) { | |
3550 | assert(ref); | |
3551 | ||
3552 | if (!ref->unit) | |
3553 | return; | |
3554 | ||
b75102e5 LP |
3555 | /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might |
3556 | * be unreferenced now. */ | |
3557 | unit_add_to_gc_queue(ref->unit); | |
3558 | ||
71fda00f | 3559 | LIST_REMOVE(refs, ref->unit->refs, ref); |
57020a3a LP |
3560 | ref->unit = NULL; |
3561 | } | |
3562 | ||
29206d46 LP |
3563 | static int user_from_unit_name(Unit *u, char **ret) { |
3564 | ||
3565 | static const uint8_t hash_key[] = { | |
3566 | 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96, | |
3567 | 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec | |
3568 | }; | |
3569 | ||
3570 | _cleanup_free_ char *n = NULL; | |
3571 | int r; | |
3572 | ||
3573 | r = unit_name_to_prefix(u->id, &n); | |
3574 | if (r < 0) | |
3575 | return r; | |
3576 | ||
3577 | if (valid_user_group_name(n)) { | |
3578 | *ret = n; | |
3579 | n = NULL; | |
3580 | return 0; | |
3581 | } | |
3582 | ||
3583 | /* If we can't use the unit name as a user name, then let's hash it and use that */ | |
3584 | if (asprintf(ret, "_du%016" PRIx64, siphash24(n, strlen(n), hash_key)) < 0) | |
3585 | return -ENOMEM; | |
3586 | ||
3587 | return 0; | |
3588 | } | |
3589 | ||
598459ce LP |
3590 | int unit_patch_contexts(Unit *u) { |
3591 | CGroupContext *cc; | |
3592 | ExecContext *ec; | |
cba6e062 LP |
3593 | unsigned i; |
3594 | int r; | |
3595 | ||
e06c73cc | 3596 | assert(u); |
e06c73cc | 3597 | |
598459ce LP |
3598 | /* Patch in the manager defaults into the exec and cgroup |
3599 | * contexts, _after_ the rest of the settings have been | |
3600 | * initialized */ | |
085afe36 | 3601 | |
598459ce LP |
3602 | ec = unit_get_exec_context(u); |
3603 | if (ec) { | |
3604 | /* This only copies in the ones that need memory */ | |
3605 | for (i = 0; i < _RLIMIT_MAX; i++) | |
3606 | if (u->manager->rlimit[i] && !ec->rlimit[i]) { | |
3607 | ec->rlimit[i] = newdup(struct rlimit, u->manager->rlimit[i], 1); | |
3608 | if (!ec->rlimit[i]) | |
3609 | return -ENOMEM; | |
3610 | } | |
3611 | ||
463d0d15 | 3612 | if (MANAGER_IS_USER(u->manager) && |
598459ce LP |
3613 | !ec->working_directory) { |
3614 | ||
3615 | r = get_home_dir(&ec->working_directory); | |
3616 | if (r < 0) | |
3617 | return r; | |
4c08c824 LP |
3618 | |
3619 | /* Allow user services to run, even if the | |
3620 | * home directory is missing */ | |
3621 | ec->working_directory_missing_ok = true; | |
cba6e062 LP |
3622 | } |
3623 | ||
598459ce | 3624 | if (ec->private_devices) |
2cd0a735 | 3625 | ec->capability_bounding_set &= ~((UINT64_C(1) << CAP_MKNOD) | (UINT64_C(1) << CAP_SYS_RAWIO)); |
502d704e DH |
3626 | |
3627 | if (ec->protect_kernel_modules) | |
3628 | ec->capability_bounding_set &= ~(UINT64_C(1) << CAP_SYS_MODULE); | |
29206d46 LP |
3629 | |
3630 | if (ec->dynamic_user) { | |
3631 | if (!ec->user) { | |
3632 | r = user_from_unit_name(u, &ec->user); | |
3633 | if (r < 0) | |
3634 | return r; | |
3635 | } | |
3636 | ||
3637 | if (!ec->group) { | |
3638 | ec->group = strdup(ec->user); | |
3639 | if (!ec->group) | |
3640 | return -ENOMEM; | |
3641 | } | |
3642 | ||
63bb64a0 LP |
3643 | /* If the dynamic user option is on, let's make sure that the unit can't leave its UID/GID |
3644 | * around in the file system or on IPC objects. Hence enforce a strict sandbox. */ | |
3645 | ||
29206d46 | 3646 | ec->private_tmp = true; |
00d9ef85 | 3647 | ec->remove_ipc = true; |
63bb64a0 LP |
3648 | ec->protect_system = PROTECT_SYSTEM_STRICT; |
3649 | if (ec->protect_home == PROTECT_HOME_NO) | |
3650 | ec->protect_home = PROTECT_HOME_READ_ONLY; | |
29206d46 | 3651 | } |
cba6e062 LP |
3652 | } |
3653 | ||
598459ce LP |
3654 | cc = unit_get_cgroup_context(u); |
3655 | if (cc) { | |
f513e420 | 3656 | |
598459ce LP |
3657 | if (ec && |
3658 | ec->private_devices && | |
3659 | cc->device_policy == CGROUP_AUTO) | |
3660 | cc->device_policy = CGROUP_CLOSED; | |
3661 | } | |
f1660f96 | 3662 | |
cba6e062 | 3663 | return 0; |
e06c73cc LP |
3664 | } |
3665 | ||
3ef63c31 LP |
3666 | ExecContext *unit_get_exec_context(Unit *u) { |
3667 | size_t offset; | |
3668 | assert(u); | |
3669 | ||
598459ce LP |
3670 | if (u->type < 0) |
3671 | return NULL; | |
3672 | ||
3ef63c31 LP |
3673 | offset = UNIT_VTABLE(u)->exec_context_offset; |
3674 | if (offset <= 0) | |
3675 | return NULL; | |
3676 | ||
3677 | return (ExecContext*) ((uint8_t*) u + offset); | |
3678 | } | |
3679 | ||
718db961 LP |
3680 | KillContext *unit_get_kill_context(Unit *u) { |
3681 | size_t offset; | |
3682 | assert(u); | |
3683 | ||
598459ce LP |
3684 | if (u->type < 0) |
3685 | return NULL; | |
3686 | ||
718db961 LP |
3687 | offset = UNIT_VTABLE(u)->kill_context_offset; |
3688 | if (offset <= 0) | |
3689 | return NULL; | |
3690 | ||
3691 | return (KillContext*) ((uint8_t*) u + offset); | |
3692 | } | |
3693 | ||
4ad49000 LP |
3694 | CGroupContext *unit_get_cgroup_context(Unit *u) { |
3695 | size_t offset; | |
3696 | ||
598459ce LP |
3697 | if (u->type < 0) |
3698 | return NULL; | |
3699 | ||
4ad49000 LP |
3700 | offset = UNIT_VTABLE(u)->cgroup_context_offset; |
3701 | if (offset <= 0) | |
3702 | return NULL; | |
3703 | ||
3704 | return (CGroupContext*) ((uint8_t*) u + offset); | |
3705 | } | |
3706 | ||
613b411c LP |
3707 | ExecRuntime *unit_get_exec_runtime(Unit *u) { |
3708 | size_t offset; | |
3709 | ||
598459ce LP |
3710 | if (u->type < 0) |
3711 | return NULL; | |
3712 | ||
613b411c LP |
3713 | offset = UNIT_VTABLE(u)->exec_runtime_offset; |
3714 | if (offset <= 0) | |
3715 | return NULL; | |
3716 | ||
3717 | return *(ExecRuntime**) ((uint8_t*) u + offset); | |
3718 | } | |
3719 | ||
39591351 | 3720 | static const char* unit_drop_in_dir(Unit *u, UnitSetPropertiesMode mode) { |
3f5e8115 LP |
3721 | assert(u); |
3722 | ||
4f4afc88 LP |
3723 | if (!IN_SET(mode, UNIT_RUNTIME, UNIT_PERSISTENT)) |
3724 | return NULL; | |
3725 | ||
39591351 LP |
3726 | if (u->transient) /* Redirect drop-ins for transient units always into the transient directory. */ |
3727 | return u->manager->lookup_paths.transient; | |
26d04f86 | 3728 | |
39591351 | 3729 | if (mode == UNIT_RUNTIME) |
4f4afc88 | 3730 | return u->manager->lookup_paths.runtime_control; |
3f5e8115 | 3731 | |
39591351 | 3732 | if (mode == UNIT_PERSISTENT) |
4f4afc88 | 3733 | return u->manager->lookup_paths.persistent_control; |
26d04f86 | 3734 | |
39591351 | 3735 | return NULL; |
71645aca LP |
3736 | } |
3737 | ||
8e2af478 | 3738 | int unit_write_drop_in(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { |
39591351 | 3739 | _cleanup_free_ char *p = NULL, *q = NULL; |
2a9a6f8a | 3740 | const char *dir, *wrapped; |
26d04f86 | 3741 | int r; |
71645aca LP |
3742 | |
3743 | assert(u); | |
3744 | ||
4f4afc88 LP |
3745 | if (u->transient_file) { |
3746 | /* When this is a transient unit file in creation, then let's not create a new drop-in but instead | |
3747 | * write to the transient unit file. */ | |
3748 | fputs(data, u->transient_file); | |
fc40065b | 3749 | fputc('\n', u->transient_file); |
4f4afc88 LP |
3750 | return 0; |
3751 | } | |
3752 | ||
6d235724 | 3753 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
8e2af478 LP |
3754 | return 0; |
3755 | ||
39591351 LP |
3756 | dir = unit_drop_in_dir(u, mode); |
3757 | if (!dir) | |
3758 | return -EINVAL; | |
71645aca | 3759 | |
2a9a6f8a | 3760 | wrapped = strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n" |
3f71dec5 | 3761 | "# or an equivalent operation. Do not edit.\n", |
2a9a6f8a ZJS |
3762 | data, |
3763 | "\n"); | |
e20b2a86 | 3764 | |
815b09d3 | 3765 | r = drop_in_file(dir, u->id, 50, name, &p, &q); |
adb76a70 WC |
3766 | if (r < 0) |
3767 | return r; | |
3768 | ||
815b09d3 | 3769 | (void) mkdir_p(p, 0755); |
2a9a6f8a | 3770 | r = write_string_file_atomic_label(q, wrapped); |
adb76a70 WC |
3771 | if (r < 0) |
3772 | return r; | |
3773 | ||
815b09d3 | 3774 | r = strv_push(&u->dropin_paths, q); |
adb76a70 WC |
3775 | if (r < 0) |
3776 | return r; | |
815b09d3 | 3777 | q = NULL; |
adb76a70 | 3778 | |
adb76a70 WC |
3779 | strv_uniq(u->dropin_paths); |
3780 | ||
3781 | u->dropin_mtime = now(CLOCK_REALTIME); | |
3782 | ||
3783 | return 0; | |
26d04f86 | 3784 | } |
71645aca | 3785 | |
b9ec9359 LP |
3786 | int unit_write_drop_in_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3787 | _cleanup_free_ char *p = NULL; | |
3788 | va_list ap; | |
3789 | int r; | |
3790 | ||
3791 | assert(u); | |
3792 | assert(name); | |
3793 | assert(format); | |
3794 | ||
6d235724 | 3795 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3796 | return 0; |
3797 | ||
3798 | va_start(ap, format); | |
3799 | r = vasprintf(&p, format, ap); | |
3800 | va_end(ap); | |
3801 | ||
3802 | if (r < 0) | |
3803 | return -ENOMEM; | |
3804 | ||
3805 | return unit_write_drop_in(u, mode, name, p); | |
3806 | } | |
3807 | ||
3808 | int unit_write_drop_in_private(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *data) { | |
39591351 | 3809 | const char *ndata; |
b42defe3 LP |
3810 | |
3811 | assert(u); | |
3812 | assert(name); | |
3813 | assert(data); | |
3814 | ||
3815 | if (!UNIT_VTABLE(u)->private_section) | |
3816 | return -EINVAL; | |
3817 | ||
6d235724 | 3818 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3819 | return 0; |
3820 | ||
81d62103 | 3821 | ndata = strjoina("[", UNIT_VTABLE(u)->private_section, "]\n", data); |
b42defe3 LP |
3822 | |
3823 | return unit_write_drop_in(u, mode, name, ndata); | |
3824 | } | |
3825 | ||
b9ec9359 LP |
3826 | int unit_write_drop_in_private_format(Unit *u, UnitSetPropertiesMode mode, const char *name, const char *format, ...) { |
3827 | _cleanup_free_ char *p = NULL; | |
3828 | va_list ap; | |
3829 | int r; | |
3830 | ||
3831 | assert(u); | |
3832 | assert(name); | |
3833 | assert(format); | |
3834 | ||
6d235724 | 3835 | if (!IN_SET(mode, UNIT_PERSISTENT, UNIT_RUNTIME)) |
b9ec9359 LP |
3836 | return 0; |
3837 | ||
3838 | va_start(ap, format); | |
3839 | r = vasprintf(&p, format, ap); | |
3840 | va_end(ap); | |
3841 | ||
3842 | if (r < 0) | |
3843 | return -ENOMEM; | |
3844 | ||
3845 | return unit_write_drop_in_private(u, mode, name, p); | |
3846 | } | |
71645aca | 3847 | |
c2756a68 | 3848 | int unit_make_transient(Unit *u) { |
4f4afc88 LP |
3849 | FILE *f; |
3850 | char *path; | |
3851 | ||
c2756a68 LP |
3852 | assert(u); |
3853 | ||
3f5e8115 LP |
3854 | if (!UNIT_VTABLE(u)->can_transient) |
3855 | return -EOPNOTSUPP; | |
3856 | ||
605405c6 | 3857 | path = strjoin(u->manager->lookup_paths.transient, "/", u->id); |
4f4afc88 LP |
3858 | if (!path) |
3859 | return -ENOMEM; | |
3860 | ||
3861 | /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are | |
3862 | * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */ | |
3863 | ||
78e334b5 | 3864 | RUN_WITH_UMASK(0022) { |
4f4afc88 | 3865 | f = fopen(path, "we"); |
78e334b5 ZJS |
3866 | if (!f) { |
3867 | free(path); | |
3868 | return -errno; | |
3869 | } | |
4f4afc88 LP |
3870 | } |
3871 | ||
3872 | if (u->transient_file) | |
3873 | fclose(u->transient_file); | |
3874 | u->transient_file = f; | |
3875 | ||
3876 | free(u->fragment_path); | |
3877 | u->fragment_path = path; | |
7c65093a | 3878 | |
7c65093a LP |
3879 | u->source_path = mfree(u->source_path); |
3880 | u->dropin_paths = strv_free(u->dropin_paths); | |
3881 | u->fragment_mtime = u->source_mtime = u->dropin_mtime = 0; | |
3882 | ||
4f4afc88 LP |
3883 | u->load_state = UNIT_STUB; |
3884 | u->load_error = 0; | |
3885 | u->transient = true; | |
3886 | ||
7c65093a LP |
3887 | unit_add_to_dbus_queue(u); |
3888 | unit_add_to_gc_queue(u); | |
c2756a68 | 3889 | |
4f4afc88 LP |
3890 | fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n", |
3891 | u->transient_file); | |
3892 | ||
3f5e8115 | 3893 | return 0; |
c2756a68 LP |
3894 | } |
3895 | ||
1d98fef1 LP |
3896 | static void log_kill(pid_t pid, int sig, void *userdata) { |
3897 | _cleanup_free_ char *comm = NULL; | |
3898 | ||
3899 | (void) get_process_comm(pid, &comm); | |
3900 | ||
3901 | /* Don't log about processes marked with brackets, under the assumption that these are temporary processes | |
3902 | only, like for example systemd's own PAM stub process. */ | |
3903 | if (comm && comm[0] == '(') | |
3904 | return; | |
3905 | ||
3906 | log_unit_notice(userdata, | |
3907 | "Killing process " PID_FMT " (%s) with signal SIG%s.", | |
3908 | pid, | |
3909 | strna(comm), | |
3910 | signal_to_string(sig)); | |
3911 | } | |
3912 | ||
3913 | static int operation_to_signal(KillContext *c, KillOperation k) { | |
3914 | assert(c); | |
3915 | ||
3916 | switch (k) { | |
3917 | ||
3918 | case KILL_TERMINATE: | |
3919 | case KILL_TERMINATE_AND_LOG: | |
3920 | return c->kill_signal; | |
3921 | ||
3922 | case KILL_KILL: | |
3923 | return SIGKILL; | |
3924 | ||
3925 | case KILL_ABORT: | |
3926 | return SIGABRT; | |
3927 | ||
3928 | default: | |
3929 | assert_not_reached("KillOperation unknown"); | |
3930 | } | |
3931 | } | |
3932 | ||
cd2086fe LP |
3933 | int unit_kill_context( |
3934 | Unit *u, | |
3935 | KillContext *c, | |
db2cb23b | 3936 | KillOperation k, |
cd2086fe LP |
3937 | pid_t main_pid, |
3938 | pid_t control_pid, | |
3939 | bool main_pid_alien) { | |
3940 | ||
1d98fef1 | 3941 | bool wait_for_exit = false, send_sighup; |
59ec09a8 | 3942 | cg_kill_log_func_t log_func = NULL; |
b821a397 | 3943 | int sig, r; |
cd2086fe LP |
3944 | |
3945 | assert(u); | |
3946 | assert(c); | |
3947 | ||
59ec09a8 ZJS |
3948 | /* Kill the processes belonging to this unit, in preparation for shutting the unit down. |
3949 | * Returns > 0 if we killed something worth waiting for, 0 otherwise. */ | |
1d98fef1 | 3950 | |
cd2086fe LP |
3951 | if (c->kill_mode == KILL_NONE) |
3952 | return 0; | |
3953 | ||
1d98fef1 LP |
3954 | sig = operation_to_signal(c, k); |
3955 | ||
3956 | send_sighup = | |
3957 | c->send_sighup && | |
3958 | IN_SET(k, KILL_TERMINATE, KILL_TERMINATE_AND_LOG) && | |
3959 | sig != SIGHUP; | |
3960 | ||
59ec09a8 ZJS |
3961 | if (k != KILL_TERMINATE || IN_SET(sig, SIGKILL, SIGABRT)) |
3962 | log_func = log_kill; | |
cd2086fe LP |
3963 | |
3964 | if (main_pid > 0) { | |
1d98fef1 LP |
3965 | if (log_func) |
3966 | log_func(main_pid, sig, u); | |
cd2086fe | 3967 | |
1d98fef1 | 3968 | r = kill_and_sigcont(main_pid, sig); |
cd2086fe LP |
3969 | if (r < 0 && r != -ESRCH) { |
3970 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 3971 | (void) get_process_comm(main_pid, &comm); |
cd2086fe | 3972 | |
b821a397 | 3973 | log_unit_warning_errno(u, r, "Failed to kill main process " PID_FMT " (%s), ignoring: %m", main_pid, strna(comm)); |
82659fd7 | 3974 | } else { |
bc6aed7b LP |
3975 | if (!main_pid_alien) |
3976 | wait_for_exit = true; | |
82659fd7 | 3977 | |
1d98fef1 | 3978 | if (r != -ESRCH && send_sighup) |
d0667321 | 3979 | (void) kill(main_pid, SIGHUP); |
82659fd7 | 3980 | } |
cd2086fe LP |
3981 | } |
3982 | ||
3983 | if (control_pid > 0) { | |
1d98fef1 LP |
3984 | if (log_func) |
3985 | log_func(control_pid, sig, u); | |
cd2086fe | 3986 | |
1d98fef1 | 3987 | r = kill_and_sigcont(control_pid, sig); |
cd2086fe LP |
3988 | if (r < 0 && r != -ESRCH) { |
3989 | _cleanup_free_ char *comm = NULL; | |
1d98fef1 | 3990 | (void) get_process_comm(control_pid, &comm); |
cd2086fe | 3991 | |
b821a397 | 3992 | log_unit_warning_errno(u, r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", control_pid, strna(comm)); |
82659fd7 | 3993 | } else { |
cd2086fe | 3994 | wait_for_exit = true; |
82659fd7 | 3995 | |
1d98fef1 | 3996 | if (r != -ESRCH && send_sighup) |
d0667321 | 3997 | (void) kill(control_pid, SIGHUP); |
82659fd7 | 3998 | } |
cd2086fe LP |
3999 | } |
4000 | ||
b821a397 LP |
4001 | if (u->cgroup_path && |
4002 | (c->kill_mode == KILL_CONTROL_GROUP || (c->kill_mode == KILL_MIXED && k == KILL_KILL))) { | |
cd2086fe LP |
4003 | _cleanup_set_free_ Set *pid_set = NULL; |
4004 | ||
82659fd7 LP |
4005 | /* Exclude the main/control pids from being killed via the cgroup */ |
4006 | pid_set = unit_pid_set(main_pid, control_pid); | |
cd2086fe LP |
4007 | if (!pid_set) |
4008 | return -ENOMEM; | |
4009 | ||
1d98fef1 LP |
4010 | r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4011 | sig, | |
4012 | CGROUP_SIGCONT|CGROUP_IGNORE_SELF, | |
4013 | pid_set, | |
4014 | log_func, u); | |
cd2086fe LP |
4015 | if (r < 0) { |
4016 | if (r != -EAGAIN && r != -ESRCH && r != -ENOENT) | |
b821a397 LP |
4017 | log_unit_warning_errno(u, r, "Failed to kill control group %s, ignoring: %m", u->cgroup_path); |
4018 | ||
82659fd7 | 4019 | } else if (r > 0) { |
bc6aed7b | 4020 | |
efdb0237 LP |
4021 | /* FIXME: For now, on the legacy hierarchy, we |
4022 | * will not wait for the cgroup members to die | |
4023 | * if we are running in a container or if this | |
4024 | * is a delegation unit, simply because cgroup | |
4025 | * notification is unreliable in these | |
4026 | * cases. It doesn't work at all in | |
4027 | * containers, and outside of containers it | |
4028 | * can be confused easily by left-over | |
ccddd104 | 4029 | * directories in the cgroup — which however |
efdb0237 LP |
4030 | * should not exist in non-delegated units. On |
4031 | * the unified hierarchy that's different, | |
4032 | * there we get proper events. Hence rely on | |
13e785f7 | 4033 | * them. */ |
efdb0237 | 4034 | |
c22800e4 | 4035 | if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) > 0 || |
415fc41c | 4036 | (detect_container() == 0 && !unit_cgroup_delegate(u))) |
e9db43d5 | 4037 | wait_for_exit = true; |
58ea275a | 4038 | |
1d98fef1 | 4039 | if (send_sighup) { |
82659fd7 LP |
4040 | set_free(pid_set); |
4041 | ||
4042 | pid_set = unit_pid_set(main_pid, control_pid); | |
4043 | if (!pid_set) | |
4044 | return -ENOMEM; | |
4045 | ||
1d98fef1 LP |
4046 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, |
4047 | SIGHUP, | |
4048 | CGROUP_IGNORE_SELF, | |
4049 | pid_set, | |
4050 | NULL, NULL); | |
82659fd7 LP |
4051 | } |
4052 | } | |
cd2086fe LP |
4053 | } |
4054 | ||
4055 | return wait_for_exit; | |
4056 | } | |
4057 | ||
a57f7e2c LP |
4058 | int unit_require_mounts_for(Unit *u, const char *path) { |
4059 | char prefix[strlen(path) + 1], *p; | |
4060 | int r; | |
4061 | ||
4062 | assert(u); | |
4063 | assert(path); | |
4064 | ||
4065 | /* Registers a unit for requiring a certain path and all its | |
4066 | * prefixes. We keep a simple array of these paths in the | |
4067 | * unit, since its usually short. However, we build a prefix | |
4068 | * table for all possible prefixes so that new appearing mount | |
4069 | * units can easily determine which units to make themselves a | |
4070 | * dependency of. */ | |
4071 | ||
70b64bd3 ZJS |
4072 | if (!path_is_absolute(path)) |
4073 | return -EINVAL; | |
4074 | ||
a57f7e2c LP |
4075 | p = strdup(path); |
4076 | if (!p) | |
4077 | return -ENOMEM; | |
4078 | ||
4079 | path_kill_slashes(p); | |
4080 | ||
a57f7e2c LP |
4081 | if (!path_is_safe(p)) { |
4082 | free(p); | |
4083 | return -EPERM; | |
4084 | } | |
4085 | ||
4086 | if (strv_contains(u->requires_mounts_for, p)) { | |
4087 | free(p); | |
4088 | return 0; | |
4089 | } | |
4090 | ||
6e18964d ZJS |
4091 | r = strv_consume(&u->requires_mounts_for, p); |
4092 | if (r < 0) | |
a57f7e2c | 4093 | return r; |
a57f7e2c LP |
4094 | |
4095 | PATH_FOREACH_PREFIX_MORE(prefix, p) { | |
4096 | Set *x; | |
4097 | ||
4098 | x = hashmap_get(u->manager->units_requiring_mounts_for, prefix); | |
4099 | if (!x) { | |
4100 | char *q; | |
4101 | ||
742f41ad LP |
4102 | r = hashmap_ensure_allocated(&u->manager->units_requiring_mounts_for, &string_hash_ops); |
4103 | if (r < 0) | |
4104 | return r; | |
a57f7e2c LP |
4105 | |
4106 | q = strdup(prefix); | |
4107 | if (!q) | |
4108 | return -ENOMEM; | |
4109 | ||
d5099efc | 4110 | x = set_new(NULL); |
a57f7e2c LP |
4111 | if (!x) { |
4112 | free(q); | |
4113 | return -ENOMEM; | |
4114 | } | |
4115 | ||
4116 | r = hashmap_put(u->manager->units_requiring_mounts_for, q, x); | |
4117 | if (r < 0) { | |
4118 | free(q); | |
4119 | set_free(x); | |
4120 | return r; | |
4121 | } | |
4122 | } | |
4123 | ||
4124 | r = set_put(x, u); | |
4125 | if (r < 0) | |
4126 | return r; | |
4127 | } | |
4128 | ||
4129 | return 0; | |
4130 | } | |
4131 | ||
613b411c LP |
4132 | int unit_setup_exec_runtime(Unit *u) { |
4133 | ExecRuntime **rt; | |
4134 | size_t offset; | |
4135 | Iterator i; | |
4136 | Unit *other; | |
4137 | ||
4138 | offset = UNIT_VTABLE(u)->exec_runtime_offset; | |
4139 | assert(offset > 0); | |
4140 | ||
06b643e7 | 4141 | /* Check if there already is an ExecRuntime for this unit? */ |
613b411c LP |
4142 | rt = (ExecRuntime**) ((uint8_t*) u + offset); |
4143 | if (*rt) | |
4144 | return 0; | |
4145 | ||
4146 | /* Try to get it from somebody else */ | |
4147 | SET_FOREACH(other, u->dependencies[UNIT_JOINS_NAMESPACE_OF], i) { | |
4148 | ||
4149 | *rt = unit_get_exec_runtime(other); | |
4150 | if (*rt) { | |
4151 | exec_runtime_ref(*rt); | |
4152 | return 0; | |
4153 | } | |
4154 | } | |
4155 | ||
4156 | return exec_runtime_make(rt, unit_get_exec_context(u), u->id); | |
4157 | } | |
4158 | ||
29206d46 LP |
4159 | int unit_setup_dynamic_creds(Unit *u) { |
4160 | ExecContext *ec; | |
4161 | DynamicCreds *dcreds; | |
4162 | size_t offset; | |
4163 | ||
4164 | assert(u); | |
4165 | ||
4166 | offset = UNIT_VTABLE(u)->dynamic_creds_offset; | |
4167 | assert(offset > 0); | |
4168 | dcreds = (DynamicCreds*) ((uint8_t*) u + offset); | |
4169 | ||
4170 | ec = unit_get_exec_context(u); | |
4171 | assert(ec); | |
4172 | ||
4173 | if (!ec->dynamic_user) | |
4174 | return 0; | |
4175 | ||
4176 | return dynamic_creds_acquire(dcreds, u->manager, ec->user, ec->group); | |
4177 | } | |
4178 | ||
1c2e9646 LP |
4179 | bool unit_type_supported(UnitType t) { |
4180 | if (_unlikely_(t < 0)) | |
4181 | return false; | |
4182 | if (_unlikely_(t >= _UNIT_TYPE_MAX)) | |
4183 | return false; | |
4184 | ||
4185 | if (!unit_vtable[t]->supported) | |
4186 | return true; | |
4187 | ||
4188 | return unit_vtable[t]->supported(); | |
4189 | } | |
4190 | ||
8b4305c7 LP |
4191 | void unit_warn_if_dir_nonempty(Unit *u, const char* where) { |
4192 | int r; | |
4193 | ||
4194 | assert(u); | |
4195 | assert(where); | |
4196 | ||
4197 | r = dir_is_empty(where); | |
4198 | if (r > 0) | |
4199 | return; | |
4200 | if (r < 0) { | |
4201 | log_unit_warning_errno(u, r, "Failed to check directory %s: %m", where); | |
4202 | return; | |
4203 | } | |
4204 | ||
4205 | log_struct(LOG_NOTICE, | |
2b044526 | 4206 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 LP |
4207 | LOG_UNIT_ID(u), |
4208 | LOG_UNIT_MESSAGE(u, "Directory %s to mount over is not empty, mounting anyway.", where), | |
4209 | "WHERE=%s", where, | |
4210 | NULL); | |
4211 | } | |
4212 | ||
4213 | int unit_fail_if_symlink(Unit *u, const char* where) { | |
4214 | int r; | |
4215 | ||
4216 | assert(u); | |
4217 | assert(where); | |
4218 | ||
4219 | r = is_symlink(where); | |
4220 | if (r < 0) { | |
4221 | log_unit_debug_errno(u, r, "Failed to check symlink %s, ignoring: %m", where); | |
4222 | return 0; | |
4223 | } | |
4224 | if (r == 0) | |
4225 | return 0; | |
4226 | ||
4227 | log_struct(LOG_ERR, | |
2b044526 | 4228 | "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR, |
8b4305c7 LP |
4229 | LOG_UNIT_ID(u), |
4230 | LOG_UNIT_MESSAGE(u, "Mount on symlink %s not allowed.", where), | |
4231 | "WHERE=%s", where, | |
4232 | NULL); | |
4233 | ||
4234 | return -ELOOP; | |
4235 | } | |
0f13f3bd LP |
4236 | |
4237 | bool unit_is_pristine(Unit *u) { | |
4238 | assert(u); | |
4239 | ||
7c65093a | 4240 | /* Check if the unit already exists or is already around, |
0f13f3bd LP |
4241 | * in a number of different ways. Note that to cater for unit |
4242 | * types such as slice, we are generally fine with units that | |
61233823 | 4243 | * are marked UNIT_LOADED even though nothing was |
0f13f3bd LP |
4244 | * actually loaded, as those unit types don't require a file |
4245 | * on disk to validly load. */ | |
4246 | ||
4247 | return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) || | |
4248 | u->fragment_path || | |
4249 | u->source_path || | |
4250 | !strv_isempty(u->dropin_paths) || | |
0f13f3bd LP |
4251 | u->job || |
4252 | u->merged_into); | |
4253 | } | |
291d565a LP |
4254 | |
4255 | pid_t unit_control_pid(Unit *u) { | |
4256 | assert(u); | |
4257 | ||
4258 | if (UNIT_VTABLE(u)->control_pid) | |
4259 | return UNIT_VTABLE(u)->control_pid(u); | |
4260 | ||
4261 | return 0; | |
4262 | } | |
4263 | ||
4264 | pid_t unit_main_pid(Unit *u) { | |
4265 | assert(u); | |
4266 | ||
4267 | if (UNIT_VTABLE(u)->main_pid) | |
4268 | return UNIT_VTABLE(u)->main_pid(u); | |
4269 | ||
4270 | return 0; | |
4271 | } | |
00d9ef85 LP |
4272 | |
4273 | static void unit_unref_uid_internal( | |
4274 | Unit *u, | |
4275 | uid_t *ref_uid, | |
4276 | bool destroy_now, | |
4277 | void (*_manager_unref_uid)(Manager *m, uid_t uid, bool destroy_now)) { | |
4278 | ||
4279 | assert(u); | |
4280 | assert(ref_uid); | |
4281 | assert(_manager_unref_uid); | |
4282 | ||
4283 | /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and | |
4284 | * gid_t are actually the same time, with the same validity rules. | |
4285 | * | |
4286 | * Drops a reference to UID/GID from a unit. */ | |
4287 | ||
4288 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4289 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4290 | ||
4291 | if (!uid_is_valid(*ref_uid)) | |
4292 | return; | |
4293 | ||
4294 | _manager_unref_uid(u->manager, *ref_uid, destroy_now); | |
4295 | *ref_uid = UID_INVALID; | |
4296 | } | |
4297 | ||
4298 | void unit_unref_uid(Unit *u, bool destroy_now) { | |
4299 | unit_unref_uid_internal(u, &u->ref_uid, destroy_now, manager_unref_uid); | |
4300 | } | |
4301 | ||
4302 | void unit_unref_gid(Unit *u, bool destroy_now) { | |
4303 | unit_unref_uid_internal(u, (uid_t*) &u->ref_gid, destroy_now, manager_unref_gid); | |
4304 | } | |
4305 | ||
4306 | static int unit_ref_uid_internal( | |
4307 | Unit *u, | |
4308 | uid_t *ref_uid, | |
4309 | uid_t uid, | |
4310 | bool clean_ipc, | |
4311 | int (*_manager_ref_uid)(Manager *m, uid_t uid, bool clean_ipc)) { | |
4312 | ||
4313 | int r; | |
4314 | ||
4315 | assert(u); | |
4316 | assert(ref_uid); | |
4317 | assert(uid_is_valid(uid)); | |
4318 | assert(_manager_ref_uid); | |
4319 | ||
4320 | /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t | |
4321 | * are actually the same type, and have the same validity rules. | |
4322 | * | |
4323 | * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a | |
4324 | * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter | |
4325 | * drops to zero. */ | |
4326 | ||
4327 | assert_cc(sizeof(uid_t) == sizeof(gid_t)); | |
4328 | assert_cc(UID_INVALID == (uid_t) GID_INVALID); | |
4329 | ||
4330 | if (*ref_uid == uid) | |
4331 | return 0; | |
4332 | ||
4333 | if (uid_is_valid(*ref_uid)) /* Already set? */ | |
4334 | return -EBUSY; | |
4335 | ||
4336 | r = _manager_ref_uid(u->manager, uid, clean_ipc); | |
4337 | if (r < 0) | |
4338 | return r; | |
4339 | ||
4340 | *ref_uid = uid; | |
4341 | return 1; | |
4342 | } | |
4343 | ||
4344 | int unit_ref_uid(Unit *u, uid_t uid, bool clean_ipc) { | |
4345 | return unit_ref_uid_internal(u, &u->ref_uid, uid, clean_ipc, manager_ref_uid); | |
4346 | } | |
4347 | ||
4348 | int unit_ref_gid(Unit *u, gid_t gid, bool clean_ipc) { | |
4349 | return unit_ref_uid_internal(u, (uid_t*) &u->ref_gid, (uid_t) gid, clean_ipc, manager_ref_gid); | |
4350 | } | |
4351 | ||
4352 | static int unit_ref_uid_gid_internal(Unit *u, uid_t uid, gid_t gid, bool clean_ipc) { | |
4353 | int r = 0, q = 0; | |
4354 | ||
4355 | assert(u); | |
4356 | ||
4357 | /* Reference both a UID and a GID in one go. Either references both, or neither. */ | |
4358 | ||
4359 | if (uid_is_valid(uid)) { | |
4360 | r = unit_ref_uid(u, uid, clean_ipc); | |
4361 | if (r < 0) | |
4362 | return r; | |
4363 | } | |
4364 | ||
4365 | if (gid_is_valid(gid)) { | |
4366 | q = unit_ref_gid(u, gid, clean_ipc); | |
4367 | if (q < 0) { | |
4368 | if (r > 0) | |
4369 | unit_unref_uid(u, false); | |
4370 | ||
4371 | return q; | |
4372 | } | |
4373 | } | |
4374 | ||
4375 | return r > 0 || q > 0; | |
4376 | } | |
4377 | ||
4378 | int unit_ref_uid_gid(Unit *u, uid_t uid, gid_t gid) { | |
4379 | ExecContext *c; | |
4380 | int r; | |
4381 | ||
4382 | assert(u); | |
4383 | ||
4384 | c = unit_get_exec_context(u); | |
4385 | ||
4386 | r = unit_ref_uid_gid_internal(u, uid, gid, c ? c->remove_ipc : false); | |
4387 | if (r < 0) | |
4388 | return log_unit_warning_errno(u, r, "Couldn't add UID/GID reference to unit, proceeding without: %m"); | |
4389 | ||
4390 | return r; | |
4391 | } | |
4392 | ||
4393 | void unit_unref_uid_gid(Unit *u, bool destroy_now) { | |
4394 | assert(u); | |
4395 | ||
4396 | unit_unref_uid(u, destroy_now); | |
4397 | unit_unref_gid(u, destroy_now); | |
4398 | } | |
4399 | ||
4400 | void unit_notify_user_lookup(Unit *u, uid_t uid, gid_t gid) { | |
4401 | int r; | |
4402 | ||
4403 | assert(u); | |
4404 | ||
4405 | /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names | |
4406 | * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC | |
4407 | * objects when no service references the UID/GID anymore. */ | |
4408 | ||
4409 | r = unit_ref_uid_gid(u, uid, gid); | |
4410 | if (r > 0) | |
4411 | bus_unit_send_change_signal(u); | |
4412 | } | |
4b58153d LP |
4413 | |
4414 | int unit_set_invocation_id(Unit *u, sd_id128_t id) { | |
4415 | int r; | |
4416 | ||
4417 | assert(u); | |
4418 | ||
4419 | /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */ | |
4420 | ||
4421 | if (sd_id128_equal(u->invocation_id, id)) | |
4422 | return 0; | |
4423 | ||
4424 | if (!sd_id128_is_null(u->invocation_id)) | |
4425 | (void) hashmap_remove_value(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4426 | ||
4427 | if (sd_id128_is_null(id)) { | |
4428 | r = 0; | |
4429 | goto reset; | |
4430 | } | |
4431 | ||
4432 | r = hashmap_ensure_allocated(&u->manager->units_by_invocation_id, &id128_hash_ops); | |
4433 | if (r < 0) | |
4434 | goto reset; | |
4435 | ||
4436 | u->invocation_id = id; | |
4437 | sd_id128_to_string(id, u->invocation_id_string); | |
4438 | ||
4439 | r = hashmap_put(u->manager->units_by_invocation_id, &u->invocation_id, u); | |
4440 | if (r < 0) | |
4441 | goto reset; | |
4442 | ||
4443 | return 0; | |
4444 | ||
4445 | reset: | |
4446 | u->invocation_id = SD_ID128_NULL; | |
4447 | u->invocation_id_string[0] = 0; | |
4448 | return r; | |
4449 | } | |
4450 | ||
4451 | int unit_acquire_invocation_id(Unit *u) { | |
4452 | sd_id128_t id; | |
4453 | int r; | |
4454 | ||
4455 | assert(u); | |
4456 | ||
4457 | r = sd_id128_randomize(&id); | |
4458 | if (r < 0) | |
4459 | return log_unit_error_errno(u, r, "Failed to generate invocation ID for unit: %m"); | |
4460 | ||
4461 | r = unit_set_invocation_id(u, id); | |
4462 | if (r < 0) | |
4463 | return log_unit_error_errno(u, r, "Failed to set invocation ID for unit: %m"); | |
4464 | ||
4465 | return 0; | |
4466 | } | |
f0d47797 LP |
4467 | |
4468 | void unit_set_exec_params(Unit *s, ExecParameters *p) { | |
4469 | CGroupContext *c; | |
4470 | ||
4471 | assert(s); | |
4472 | assert(s); | |
4473 | ||
4474 | p->cgroup_path = s->cgroup_path; | |
4475 | ||
4476 | c = unit_get_cgroup_context(s); | |
4477 | SET_FLAG(p->flags, EXEC_CGROUP_DELEGATE, c && c->delegate); | |
4478 | } | |
a79279c7 LP |
4479 | |
4480 | int unit_fork_helper_process(Unit *u, pid_t *ret) { | |
4481 | pid_t pid; | |
4482 | int r; | |
4483 | ||
4484 | assert(u); | |
4485 | assert(ret); | |
4486 | ||
4487 | /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child, | |
4488 | * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */ | |
4489 | ||
4490 | (void) unit_realize_cgroup(u); | |
4491 | ||
4492 | pid = fork(); | |
4493 | if (pid < 0) | |
4494 | return -errno; | |
4495 | ||
4496 | if (pid == 0) { | |
4497 | ||
4498 | (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); | |
4499 | (void) ignore_signals(SIGPIPE, -1); | |
4500 | ||
4501 | log_close(); | |
4502 | log_open(); | |
4503 | ||
4504 | if (u->cgroup_path) { | |
4505 | r = cg_attach_everywhere(u->manager->cgroup_supported, u->cgroup_path, 0, NULL, NULL); | |
4506 | if (r < 0) { | |
4507 | log_unit_error_errno(u, r, "Failed to join unit cgroup %s: %m", u->cgroup_path); | |
4508 | _exit(EXIT_CGROUP); | |
4509 | } | |
4510 | } | |
4511 | ||
4512 | *ret = getpid_cached(); | |
4513 | return 0; | |
4514 | } | |
4515 | ||
4516 | *ret = pid; | |
4517 | return 1; | |
4518 | } |