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87f0e418 LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
87f0e418 LP |
22 | #include <assert.h> |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <sys/epoll.h> | |
26 | #include <sys/timerfd.h> | |
27 | #include <sys/poll.h> | |
0301abf4 LP |
28 | #include <stdlib.h> |
29 | #include <unistd.h> | |
87f0e418 LP |
30 | |
31 | #include "set.h" | |
32 | #include "unit.h" | |
33 | #include "macro.h" | |
34 | #include "strv.h" | |
35 | #include "load-fragment.h" | |
36 | #include "load-dropin.h" | |
37 | #include "log.h" | |
38 | ||
39 | const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX] = { | |
40 | [UNIT_SERVICE] = &service_vtable, | |
41 | [UNIT_TIMER] = &timer_vtable, | |
42 | [UNIT_SOCKET] = &socket_vtable, | |
43 | [UNIT_TARGET] = &target_vtable, | |
44 | [UNIT_DEVICE] = &device_vtable, | |
45 | [UNIT_MOUNT] = &mount_vtable, | |
46 | [UNIT_AUTOMOUNT] = &automount_vtable, | |
47 | [UNIT_SNAPSHOT] = &snapshot_vtable | |
48 | }; | |
49 | ||
50 | UnitType unit_name_to_type(const char *n) { | |
51 | UnitType t; | |
52 | ||
53 | assert(n); | |
54 | ||
55 | for (t = 0; t < _UNIT_TYPE_MAX; t++) | |
56 | if (endswith(n, unit_vtable[t]->suffix)) | |
57 | return t; | |
58 | ||
59 | return _UNIT_TYPE_INVALID; | |
60 | } | |
61 | ||
62 | #define VALID_CHARS \ | |
63 | "0123456789" \ | |
64 | "abcdefghijklmnopqrstuvwxyz" \ | |
65 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \ | |
b5ea5d95 | 66 | "-_.\\" |
87f0e418 LP |
67 | |
68 | bool unit_name_is_valid(const char *n) { | |
69 | UnitType t; | |
70 | const char *e, *i; | |
71 | ||
72 | assert(n); | |
73 | ||
74 | if (strlen(n) >= UNIT_NAME_MAX) | |
75 | return false; | |
76 | ||
77 | t = unit_name_to_type(n); | |
78 | if (t < 0 || t >= _UNIT_TYPE_MAX) | |
79 | return false; | |
80 | ||
81 | if (!(e = strrchr(n, '.'))) | |
82 | return false; | |
83 | ||
48e11fe8 LP |
84 | if (e == n) |
85 | return false; | |
86 | ||
87f0e418 LP |
87 | for (i = n; i < e; i++) |
88 | if (!strchr(VALID_CHARS, *i)) | |
89 | return false; | |
90 | ||
91 | return true; | |
92 | } | |
93 | ||
94 | char *unit_name_change_suffix(const char *n, const char *suffix) { | |
95 | char *e, *r; | |
96 | size_t a, b; | |
97 | ||
98 | assert(n); | |
99 | assert(unit_name_is_valid(n)); | |
100 | assert(suffix); | |
101 | ||
102 | assert_se(e = strrchr(n, '.')); | |
103 | a = e - n; | |
104 | b = strlen(suffix); | |
105 | ||
106 | if (!(r = new(char, a + b + 1))) | |
107 | return NULL; | |
108 | ||
109 | memcpy(r, n, a); | |
110 | memcpy(r+a, suffix, b+1); | |
111 | ||
112 | return r; | |
113 | } | |
114 | ||
115 | Unit *unit_new(Manager *m) { | |
116 | Unit *u; | |
117 | ||
118 | assert(m); | |
119 | ||
120 | if (!(u = new0(Unit, 1))) | |
121 | return NULL; | |
122 | ||
123 | if (!(u->meta.names = set_new(string_hash_func, string_compare_func))) { | |
124 | free(u); | |
125 | return NULL; | |
126 | } | |
127 | ||
128 | u->meta.manager = m; | |
129 | u->meta.type = _UNIT_TYPE_INVALID; | |
130 | ||
131 | return u; | |
132 | } | |
133 | ||
f278026d LP |
134 | bool unit_has_name(Unit *u, const char *name) { |
135 | assert(u); | |
136 | assert(name); | |
137 | ||
138 | return !!set_get(u->meta.names, (char*) name); | |
139 | } | |
140 | ||
87f0e418 LP |
141 | int unit_add_name(Unit *u, const char *text) { |
142 | UnitType t; | |
143 | char *s; | |
144 | int r; | |
145 | ||
146 | assert(u); | |
147 | assert(text); | |
148 | ||
149 | if (!unit_name_is_valid(text)) | |
150 | return -EINVAL; | |
151 | ||
152 | if ((t = unit_name_to_type(text)) == _UNIT_TYPE_INVALID) | |
153 | return -EINVAL; | |
154 | ||
155 | if (u->meta.type != _UNIT_TYPE_INVALID && t != u->meta.type) | |
156 | return -EINVAL; | |
157 | ||
e537352b LP |
158 | if (u->meta.type != _UNIT_TYPE_INVALID && |
159 | UNIT_VTABLE(u)->no_alias && | |
160 | !set_isempty(u->meta.names)) | |
161 | return -EEXIST; | |
162 | ||
87f0e418 LP |
163 | if (!(s = strdup(text))) |
164 | return -ENOMEM; | |
165 | ||
166 | if ((r = set_put(u->meta.names, s)) < 0) { | |
167 | free(s); | |
168 | ||
169 | if (r == -EEXIST) | |
170 | return 0; | |
171 | ||
172 | return r; | |
173 | } | |
174 | ||
175 | if ((r = hashmap_put(u->meta.manager->units, s, u)) < 0) { | |
176 | set_remove(u->meta.names, s); | |
177 | free(s); | |
178 | return r; | |
179 | } | |
180 | ||
e537352b | 181 | if (u->meta.type == _UNIT_TYPE_INVALID) { |
ef734fd6 LP |
182 | LIST_PREPEND(Meta, units_per_type, u->meta.manager->units_per_type[t], &u->meta); |
183 | ||
e537352b LP |
184 | u->meta.type = t; |
185 | ||
186 | if (UNIT_VTABLE(u)->init) | |
187 | UNIT_VTABLE(u)->init(u); | |
188 | } | |
87f0e418 LP |
189 | |
190 | if (!u->meta.id) | |
191 | u->meta.id = s; | |
192 | ||
c1e1601e | 193 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
194 | return 0; |
195 | } | |
196 | ||
0ae97ec1 LP |
197 | int unit_choose_id(Unit *u, const char *name) { |
198 | char *s; | |
199 | ||
200 | assert(u); | |
201 | assert(name); | |
202 | ||
203 | /* Selects one of the names of this unit as the id */ | |
204 | ||
205 | if (!(s = set_get(u->meta.names, (char*) name))) | |
206 | return -ENOENT; | |
207 | ||
208 | u->meta.id = s; | |
c1e1601e LP |
209 | |
210 | unit_add_to_dbus_queue(u); | |
0ae97ec1 LP |
211 | return 0; |
212 | } | |
213 | ||
f50e0a01 LP |
214 | int unit_set_description(Unit *u, const char *description) { |
215 | char *s; | |
216 | ||
217 | assert(u); | |
218 | ||
219 | if (!(s = strdup(description))) | |
220 | return -ENOMEM; | |
221 | ||
222 | free(u->meta.description); | |
223 | u->meta.description = s; | |
c1e1601e LP |
224 | |
225 | unit_add_to_dbus_queue(u); | |
f50e0a01 LP |
226 | return 0; |
227 | } | |
228 | ||
87f0e418 LP |
229 | void unit_add_to_load_queue(Unit *u) { |
230 | assert(u); | |
819e213f | 231 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
87f0e418 LP |
232 | |
233 | if (u->meta.load_state != UNIT_STUB || u->meta.in_load_queue) | |
234 | return; | |
235 | ||
236 | LIST_PREPEND(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
237 | u->meta.in_load_queue = true; | |
238 | } | |
239 | ||
23a177ef LP |
240 | void unit_add_to_cleanup_queue(Unit *u) { |
241 | assert(u); | |
242 | ||
243 | if (u->meta.in_cleanup_queue) | |
244 | return; | |
245 | ||
246 | LIST_PREPEND(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
247 | u->meta.in_cleanup_queue = true; | |
248 | } | |
249 | ||
c1e1601e LP |
250 | void unit_add_to_dbus_queue(Unit *u) { |
251 | assert(u); | |
819e213f | 252 | assert(u->meta.type != _UNIT_TYPE_INVALID); |
c1e1601e LP |
253 | |
254 | if (u->meta.load_state == UNIT_STUB || u->meta.in_dbus_queue || set_isempty(u->meta.manager->subscribed)) | |
255 | return; | |
256 | ||
257 | LIST_PREPEND(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
258 | u->meta.in_dbus_queue = true; | |
259 | } | |
260 | ||
87f0e418 LP |
261 | static void bidi_set_free(Unit *u, Set *s) { |
262 | Iterator i; | |
263 | Unit *other; | |
264 | ||
265 | assert(u); | |
266 | ||
267 | /* Frees the set and makes sure we are dropped from the | |
268 | * inverse pointers */ | |
269 | ||
270 | SET_FOREACH(other, s, i) { | |
271 | UnitDependency d; | |
272 | ||
273 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
274 | set_remove(other->meta.dependencies[d], u); | |
275 | } | |
276 | ||
277 | set_free(s); | |
278 | } | |
279 | ||
280 | void unit_free(Unit *u) { | |
281 | UnitDependency d; | |
282 | Iterator i; | |
283 | char *t; | |
284 | ||
285 | assert(u); | |
286 | ||
c1e1601e LP |
287 | bus_unit_send_removed_signal(u); |
288 | ||
87f0e418 | 289 | /* Detach from next 'bigger' objects */ |
87f0e418 LP |
290 | SET_FOREACH(t, u->meta.names, i) |
291 | hashmap_remove_value(u->meta.manager->units, t, u); | |
292 | ||
ef734fd6 LP |
293 | if (u->meta.type != _UNIT_TYPE_INVALID) |
294 | LIST_REMOVE(Meta, units_per_type, u->meta.manager->units_per_type[u->meta.type], &u->meta); | |
295 | ||
87f0e418 LP |
296 | if (u->meta.in_load_queue) |
297 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
298 | ||
c1e1601e LP |
299 | if (u->meta.in_dbus_queue) |
300 | LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta); | |
301 | ||
23a177ef LP |
302 | if (u->meta.in_cleanup_queue) |
303 | LIST_REMOVE(Meta, cleanup_queue, u->meta.manager->cleanup_queue, &u->meta); | |
304 | ||
e537352b LP |
305 | /* Free data and next 'smaller' objects */ |
306 | if (u->meta.job) | |
307 | job_free(u->meta.job); | |
308 | ||
23a177ef | 309 | if (u->meta.load_state != UNIT_STUB) |
87f0e418 LP |
310 | if (UNIT_VTABLE(u)->done) |
311 | UNIT_VTABLE(u)->done(u); | |
312 | ||
e537352b | 313 | cgroup_bonding_free_list(u->meta.cgroup_bondings); |
87f0e418 LP |
314 | |
315 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
316 | bidi_set_free(u, u->meta.dependencies[d]); | |
317 | ||
318 | free(u->meta.description); | |
6be1e7d5 | 319 | free(u->meta.fragment_path); |
87f0e418 LP |
320 | |
321 | while ((t = set_steal_first(u->meta.names))) | |
322 | free(t); | |
323 | set_free(u->meta.names); | |
324 | ||
325 | free(u); | |
326 | } | |
327 | ||
328 | UnitActiveState unit_active_state(Unit *u) { | |
329 | assert(u); | |
330 | ||
331 | if (u->meta.load_state != UNIT_LOADED) | |
332 | return UNIT_INACTIVE; | |
333 | ||
334 | return UNIT_VTABLE(u)->active_state(u); | |
335 | } | |
336 | ||
23a177ef LP |
337 | static void complete_move(Set **s, Set **other) { |
338 | assert(s); | |
339 | assert(other); | |
87f0e418 | 340 | |
23a177ef LP |
341 | if (!*other) |
342 | return; | |
87f0e418 LP |
343 | |
344 | if (*s) | |
23a177ef LP |
345 | set_move(*s, *other); |
346 | else { | |
347 | *s = *other; | |
348 | *other = NULL; | |
349 | } | |
350 | } | |
87f0e418 | 351 | |
23a177ef LP |
352 | static void merge_names(Unit *u, Unit *other) { |
353 | char *t; | |
354 | Iterator i; | |
87f0e418 | 355 | |
23a177ef LP |
356 | assert(u); |
357 | assert(other); | |
358 | ||
359 | complete_move(&u->meta.names, &other->meta.names); | |
360 | ||
361 | while ((t = set_steal_first(other->meta.names))) | |
362 | free(t); | |
363 | ||
364 | set_free(other->meta.names); | |
365 | other->meta.names = NULL; | |
366 | other->meta.id = NULL; | |
367 | ||
368 | SET_FOREACH(t, u->meta.names, i) | |
369 | assert_se(hashmap_replace(u->meta.manager->units, t, u) == 0); | |
87f0e418 LP |
370 | } |
371 | ||
23a177ef LP |
372 | static void merge_dependencies(Unit *u, Unit *other, UnitDependency d) { |
373 | Iterator i; | |
374 | Unit *back; | |
87f0e418 | 375 | int r; |
23a177ef LP |
376 | |
377 | assert(u); | |
378 | assert(other); | |
379 | assert(d < _UNIT_DEPENDENCY_MAX); | |
380 | ||
381 | SET_FOREACH(back, other->meta.dependencies[d], i) { | |
382 | UnitDependency k; | |
383 | ||
384 | for (k = 0; k < _UNIT_DEPENDENCY_MAX; k++) | |
385 | if ((r = set_remove_and_put(back->meta.dependencies[k], other, u)) < 0) { | |
386 | ||
387 | if (r == -EEXIST) | |
388 | set_remove(back->meta.dependencies[k], other); | |
389 | else | |
390 | assert(r == -ENOENT); | |
391 | } | |
392 | } | |
393 | ||
394 | complete_move(&u->meta.dependencies[d], &other->meta.dependencies[d]); | |
395 | ||
396 | set_free(other->meta.dependencies[d]); | |
397 | other->meta.dependencies[d] = NULL; | |
398 | } | |
399 | ||
400 | int unit_merge(Unit *u, Unit *other) { | |
87f0e418 LP |
401 | UnitDependency d; |
402 | ||
403 | assert(u); | |
404 | assert(other); | |
405 | assert(u->meta.manager == other->meta.manager); | |
406 | ||
cc916967 LP |
407 | other = unit_follow_merge(other); |
408 | ||
23a177ef LP |
409 | if (other == u) |
410 | return 0; | |
411 | ||
87f0e418 LP |
412 | if (u->meta.type != u->meta.type) |
413 | return -EINVAL; | |
414 | ||
cc916967 LP |
415 | if (other->meta.load_state != UNIT_STUB && |
416 | other->meta.load_state != UNIT_FAILED) | |
23a177ef | 417 | return -EEXIST; |
87f0e418 | 418 | |
819e213f LP |
419 | if (other->meta.job) |
420 | return -EEXIST; | |
421 | ||
422 | if (unit_active_state(other) != UNIT_INACTIVE) | |
423 | return -EEXIST; | |
424 | ||
87f0e418 | 425 | /* Merge names */ |
23a177ef | 426 | merge_names(u, other); |
87f0e418 LP |
427 | |
428 | /* Merge dependencies */ | |
429 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) | |
23a177ef | 430 | merge_dependencies(u, other, d); |
87f0e418 | 431 | |
23a177ef LP |
432 | other->meta.load_state = UNIT_MERGED; |
433 | other->meta.merged_into = u; | |
434 | ||
3616a49c LP |
435 | /* If there is still some data attached to the other node, we |
436 | * don't need it anymore, and can free it. */ | |
437 | if (other->meta.load_state != UNIT_STUB) | |
438 | if (UNIT_VTABLE(other)->done) | |
439 | UNIT_VTABLE(other)->done(other); | |
440 | ||
441 | unit_add_to_dbus_queue(u); | |
23a177ef LP |
442 | unit_add_to_cleanup_queue(other); |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | int unit_merge_by_name(Unit *u, const char *name) { | |
448 | Unit *other; | |
449 | ||
450 | assert(u); | |
451 | assert(name); | |
452 | ||
453 | if (!(other = manager_get_unit(u->meta.manager, name))) | |
454 | return unit_add_name(u, name); | |
455 | ||
456 | return unit_merge(u, other); | |
457 | } | |
458 | ||
459 | Unit* unit_follow_merge(Unit *u) { | |
460 | assert(u); | |
461 | ||
462 | while (u->meta.load_state == UNIT_MERGED) | |
463 | assert_se(u = u->meta.merged_into); | |
464 | ||
465 | return u; | |
466 | } | |
467 | ||
468 | int unit_add_exec_dependencies(Unit *u, ExecContext *c) { | |
469 | int r; | |
470 | ||
471 | assert(u); | |
472 | assert(c); | |
473 | ||
474 | if (c->output != EXEC_OUTPUT_KERNEL && c->output != EXEC_OUTPUT_SYSLOG) | |
475 | return 0; | |
476 | ||
477 | /* If syslog or kernel logging is requested, make sure our own | |
478 | * logging daemon is run first. */ | |
479 | ||
480 | if ((r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_LOGGER_SOCKET)) < 0) | |
481 | return r; | |
482 | ||
483 | if (u->meta.manager->running_as != MANAGER_SESSION) | |
484 | if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_LOGGER_SOCKET)) < 0) | |
485 | return r; | |
486 | ||
87f0e418 LP |
487 | return 0; |
488 | } | |
489 | ||
490 | const char* unit_id(Unit *u) { | |
491 | assert(u); | |
492 | ||
493 | if (u->meta.id) | |
494 | return u->meta.id; | |
495 | ||
496 | return set_first(u->meta.names); | |
497 | } | |
498 | ||
499 | const char *unit_description(Unit *u) { | |
500 | assert(u); | |
501 | ||
502 | if (u->meta.description) | |
503 | return u->meta.description; | |
504 | ||
505 | return unit_id(u); | |
506 | } | |
507 | ||
508 | void unit_dump(Unit *u, FILE *f, const char *prefix) { | |
87f0e418 LP |
509 | char *t; |
510 | UnitDependency d; | |
511 | Iterator i; | |
47be870b LP |
512 | char *p2; |
513 | const char *prefix2; | |
8e274523 | 514 | CGroupBonding *b; |
2fad8195 | 515 | char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX]; |
87f0e418 LP |
516 | |
517 | assert(u); | |
518 | ||
519 | if (!prefix) | |
520 | prefix = ""; | |
47be870b LP |
521 | p2 = strappend(prefix, "\t"); |
522 | prefix2 = p2 ? p2 : prefix; | |
87f0e418 LP |
523 | |
524 | fprintf(f, | |
525 | "%s→ Unit %s:\n" | |
526 | "%s\tDescription: %s\n" | |
527 | "%s\tUnit Load State: %s\n" | |
2fad8195 LP |
528 | "%s\tUnit Active State: %s\n" |
529 | "%s\tActive Enter Timestamp: %s\n" | |
530 | "%s\tActive Exit Timestamp: %s\n", | |
87f0e418 LP |
531 | prefix, unit_id(u), |
532 | prefix, unit_description(u), | |
94f04347 | 533 | prefix, unit_load_state_to_string(u->meta.load_state), |
2fad8195 LP |
534 | prefix, unit_active_state_to_string(unit_active_state(u)), |
535 | prefix, strna(format_timestamp(timestamp1, sizeof(timestamp1), u->meta.active_enter_timestamp)), | |
536 | prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_exit_timestamp))); | |
0301abf4 | 537 | |
87f0e418 LP |
538 | SET_FOREACH(t, u->meta.names, i) |
539 | fprintf(f, "%s\tName: %s\n", prefix, t); | |
540 | ||
23a177ef LP |
541 | if (u->meta.fragment_path) |
542 | fprintf(f, "%s\tFragment Path: %s\n", prefix, u->meta.fragment_path); | |
543 | ||
87f0e418 LP |
544 | for (d = 0; d < _UNIT_DEPENDENCY_MAX; d++) { |
545 | Unit *other; | |
546 | ||
87f0e418 | 547 | SET_FOREACH(other, u->meta.dependencies[d], i) |
94f04347 | 548 | fprintf(f, "%s\t%s: %s\n", prefix, unit_dependency_to_string(d), unit_id(other)); |
87f0e418 LP |
549 | } |
550 | ||
23a177ef | 551 | if (u->meta.load_state == UNIT_LOADED) { |
b0650475 LP |
552 | fprintf(f, |
553 | "%s\tRecursive Stop: %s\n" | |
554 | "%s\tStop When Unneeded: %s\n", | |
555 | prefix, yes_no(u->meta.recursive_stop), | |
556 | prefix, yes_no(u->meta.stop_when_unneeded)); | |
557 | ||
23a177ef LP |
558 | LIST_FOREACH(by_unit, b, u->meta.cgroup_bondings) |
559 | fprintf(f, "%s\tControlGroup: %s:%s\n", | |
560 | prefix, b->controller, b->path); | |
8e274523 | 561 | |
23a177ef LP |
562 | if (UNIT_VTABLE(u)->dump) |
563 | UNIT_VTABLE(u)->dump(u, f, prefix2); | |
b0650475 LP |
564 | |
565 | } else if (u->meta.load_state == UNIT_MERGED) | |
566 | fprintf(f, | |
567 | "%s\tMerged into: %s\n", | |
568 | prefix, unit_id(u->meta.merged_into)); | |
87f0e418 LP |
569 | |
570 | if (u->meta.job) | |
571 | job_dump(u->meta.job, f, prefix2); | |
572 | ||
47be870b | 573 | free(p2); |
87f0e418 LP |
574 | } |
575 | ||
576 | /* Common implementation for multiple backends */ | |
e537352b | 577 | int unit_load_fragment_and_dropin(Unit *u) { |
23a177ef LP |
578 | int r; |
579 | ||
580 | assert(u); | |
23a177ef LP |
581 | |
582 | /* Load a .service file */ | |
e537352b | 583 | if ((r = unit_load_fragment(u)) < 0) |
23a177ef LP |
584 | return r; |
585 | ||
e537352b | 586 | if (u->meta.load_state == UNIT_STUB) |
23a177ef LP |
587 | return -ENOENT; |
588 | ||
589 | /* Load drop-in directory data */ | |
590 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
591 | return r; | |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
596 | /* Common implementation for multiple backends */ | |
e537352b | 597 | int unit_load_fragment_and_dropin_optional(Unit *u) { |
23a177ef | 598 | int r; |
87f0e418 LP |
599 | |
600 | assert(u); | |
601 | ||
23a177ef LP |
602 | /* Same as unit_load_fragment_and_dropin(), but whether |
603 | * something can be loaded or not doesn't matter. */ | |
604 | ||
605 | /* Load a .service file */ | |
e537352b | 606 | if ((r = unit_load_fragment(u)) < 0) |
87f0e418 LP |
607 | return r; |
608 | ||
e537352b LP |
609 | if (u->meta.load_state == UNIT_STUB) |
610 | u->meta.load_state = UNIT_LOADED; | |
d46de8a1 | 611 | |
87f0e418 | 612 | /* Load drop-in directory data */ |
23a177ef | 613 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) |
87f0e418 LP |
614 | return r; |
615 | ||
23a177ef | 616 | return 0; |
87f0e418 LP |
617 | } |
618 | ||
619 | int unit_load(Unit *u) { | |
620 | int r; | |
621 | ||
622 | assert(u); | |
623 | ||
624 | if (u->meta.in_load_queue) { | |
625 | LIST_REMOVE(Meta, load_queue, u->meta.manager->load_queue, &u->meta); | |
626 | u->meta.in_load_queue = false; | |
627 | } | |
628 | ||
e537352b LP |
629 | if (u->meta.type == _UNIT_TYPE_INVALID) |
630 | return -EINVAL; | |
631 | ||
87f0e418 LP |
632 | if (u->meta.load_state != UNIT_STUB) |
633 | return 0; | |
634 | ||
e537352b LP |
635 | if (UNIT_VTABLE(u)->load) |
636 | if ((r = UNIT_VTABLE(u)->load(u)) < 0) | |
87f0e418 | 637 | goto fail; |
23a177ef | 638 | |
e537352b | 639 | if (u->meta.load_state == UNIT_STUB) { |
23a177ef LP |
640 | r = -ENOENT; |
641 | goto fail; | |
642 | } | |
643 | ||
23a177ef LP |
644 | assert((u->meta.load_state != UNIT_MERGED) == !u->meta.merged_into); |
645 | ||
646 | unit_add_to_dbus_queue(unit_follow_merge(u)); | |
87f0e418 | 647 | |
87f0e418 LP |
648 | return 0; |
649 | ||
650 | fail: | |
651 | u->meta.load_state = UNIT_FAILED; | |
c1e1601e | 652 | unit_add_to_dbus_queue(u); |
23a177ef LP |
653 | |
654 | log_error("Failed to load configuration for %s: %s", unit_id(u), strerror(-r)); | |
655 | ||
87f0e418 LP |
656 | return r; |
657 | } | |
658 | ||
659 | /* Errors: | |
660 | * -EBADR: This unit type does not support starting. | |
661 | * -EALREADY: Unit is already started. | |
662 | * -EAGAIN: An operation is already in progress. Retry later. | |
663 | */ | |
664 | int unit_start(Unit *u) { | |
665 | UnitActiveState state; | |
666 | ||
667 | assert(u); | |
668 | ||
7898b0cf LP |
669 | /* If this is already (being) started, then this will |
670 | * succeed. Note that this will even succeed if this unit is | |
671 | * not startable by the user. This is relied on to detect when | |
672 | * we need to wait for units and when waiting is finished. */ | |
87f0e418 LP |
673 | state = unit_active_state(u); |
674 | if (UNIT_IS_ACTIVE_OR_RELOADING(state)) | |
675 | return -EALREADY; | |
676 | ||
7898b0cf LP |
677 | /* If it is stopped, but we cannot start it, then fail */ |
678 | if (!UNIT_VTABLE(u)->start) | |
679 | return -EBADR; | |
680 | ||
87f0e418 LP |
681 | /* We don't suppress calls to ->start() here when we are |
682 | * already starting, to allow this request to be used as a | |
683 | * "hurry up" call, for example when the unit is in some "auto | |
684 | * restart" state where it waits for a holdoff timer to elapse | |
685 | * before it will start again. */ | |
686 | ||
c1e1601e | 687 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
688 | return UNIT_VTABLE(u)->start(u); |
689 | } | |
690 | ||
691 | bool unit_can_start(Unit *u) { | |
692 | assert(u); | |
693 | ||
694 | return !!UNIT_VTABLE(u)->start; | |
695 | } | |
696 | ||
697 | /* Errors: | |
698 | * -EBADR: This unit type does not support stopping. | |
699 | * -EALREADY: Unit is already stopped. | |
700 | * -EAGAIN: An operation is already in progress. Retry later. | |
701 | */ | |
702 | int unit_stop(Unit *u) { | |
703 | UnitActiveState state; | |
704 | ||
705 | assert(u); | |
706 | ||
87f0e418 LP |
707 | state = unit_active_state(u); |
708 | if (state == UNIT_INACTIVE) | |
709 | return -EALREADY; | |
710 | ||
7898b0cf LP |
711 | if (!UNIT_VTABLE(u)->stop) |
712 | return -EBADR; | |
713 | ||
c1e1601e | 714 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
715 | return UNIT_VTABLE(u)->stop(u); |
716 | } | |
717 | ||
718 | /* Errors: | |
719 | * -EBADR: This unit type does not support reloading. | |
720 | * -ENOEXEC: Unit is not started. | |
721 | * -EAGAIN: An operation is already in progress. Retry later. | |
722 | */ | |
723 | int unit_reload(Unit *u) { | |
724 | UnitActiveState state; | |
725 | ||
726 | assert(u); | |
727 | ||
728 | if (!unit_can_reload(u)) | |
729 | return -EBADR; | |
730 | ||
731 | state = unit_active_state(u); | |
732 | if (unit_active_state(u) == UNIT_ACTIVE_RELOADING) | |
733 | return -EALREADY; | |
734 | ||
735 | if (unit_active_state(u) != UNIT_ACTIVE) | |
736 | return -ENOEXEC; | |
737 | ||
c1e1601e | 738 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
739 | return UNIT_VTABLE(u)->reload(u); |
740 | } | |
741 | ||
742 | bool unit_can_reload(Unit *u) { | |
743 | assert(u); | |
744 | ||
745 | if (!UNIT_VTABLE(u)->reload) | |
746 | return false; | |
747 | ||
748 | if (!UNIT_VTABLE(u)->can_reload) | |
749 | return true; | |
750 | ||
751 | return UNIT_VTABLE(u)->can_reload(u); | |
752 | } | |
753 | ||
f3bff0eb LP |
754 | static void unit_check_uneeded(Unit *u) { |
755 | Iterator i; | |
756 | Unit *other; | |
757 | ||
758 | assert(u); | |
759 | ||
760 | /* If this service shall be shut down when unneeded then do | |
761 | * so. */ | |
762 | ||
763 | if (!u->meta.stop_when_unneeded) | |
764 | return; | |
765 | ||
766 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))) | |
767 | return; | |
768 | ||
769 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
770 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
771 | return; | |
772 | ||
773 | SET_FOREACH(other, u->meta.dependencies[UNIT_SOFT_REQUIRED_BY], i) | |
774 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
775 | return; | |
776 | ||
777 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTED_BY], i) | |
778 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
779 | return; | |
780 | ||
781 | log_debug("Service %s is not needed anymore. Stopping.", unit_id(u)); | |
782 | ||
783 | /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */ | |
784 | manager_add_job(u->meta.manager, JOB_STOP, u, JOB_FAIL, true, NULL); | |
785 | } | |
786 | ||
87f0e418 LP |
787 | static void retroactively_start_dependencies(Unit *u) { |
788 | Iterator i; | |
789 | Unit *other; | |
790 | ||
791 | assert(u); | |
792 | assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u))); | |
793 | ||
794 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
795 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
796 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); | |
797 | ||
798 | SET_FOREACH(other, u->meta.dependencies[UNIT_SOFT_REQUIRES], i) | |
799 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
800 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); | |
801 | ||
802 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
803 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
804 | manager_add_job(u->meta.manager, JOB_START, other, JOB_REPLACE, true, NULL); | |
805 | ||
806 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
807 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
808 | manager_add_job(u->meta.manager, JOB_START, other, JOB_FAIL, false, NULL); | |
809 | ||
810 | SET_FOREACH(other, u->meta.dependencies[UNIT_CONFLICTS], i) | |
811 | if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other))) | |
812 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); | |
813 | } | |
814 | ||
815 | static void retroactively_stop_dependencies(Unit *u) { | |
816 | Iterator i; | |
817 | Unit *other; | |
818 | ||
819 | assert(u); | |
820 | assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u))); | |
821 | ||
f3bff0eb LP |
822 | if (u->meta.recursive_stop) { |
823 | /* Pull down units need us recursively if enabled */ | |
824 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRED_BY], i) | |
825 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
826 | manager_add_job(u->meta.manager, JOB_STOP, other, JOB_REPLACE, true, NULL); | |
827 | } | |
828 | ||
829 | /* Garbage collect services that might not be needed anymore, if enabled */ | |
830 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUIRES], i) | |
87f0e418 | 831 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) |
f3bff0eb LP |
832 | unit_check_uneeded(other); |
833 | SET_FOREACH(other, u->meta.dependencies[UNIT_SOFT_REQUIRES], i) | |
834 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
835 | unit_check_uneeded(other); | |
836 | SET_FOREACH(other, u->meta.dependencies[UNIT_WANTS], i) | |
837 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
838 | unit_check_uneeded(other); | |
839 | SET_FOREACH(other, u->meta.dependencies[UNIT_REQUISITE], i) | |
840 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
841 | unit_check_uneeded(other); | |
842 | SET_FOREACH(other, u->meta.dependencies[UNIT_SOFT_REQUISITE], i) | |
843 | if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other))) | |
844 | unit_check_uneeded(other); | |
87f0e418 LP |
845 | } |
846 | ||
847 | void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns) { | |
a096ed36 LP |
848 | bool unexpected = false; |
849 | ||
87f0e418 LP |
850 | assert(u); |
851 | assert(os < _UNIT_ACTIVE_STATE_MAX); | |
852 | assert(ns < _UNIT_ACTIVE_STATE_MAX); | |
853 | assert(!(os == UNIT_ACTIVE && ns == UNIT_ACTIVATING)); | |
854 | assert(!(os == UNIT_INACTIVE && ns == UNIT_DEACTIVATING)); | |
855 | ||
8e471ccd LP |
856 | /* Note that this is called for all low-level state changes, |
857 | * even if they might map to the same high-level | |
858 | * UnitActiveState! That means that ns == os is OK an expected | |
859 | * behaviour here. For example: if a mount point is remounted | |
860 | * this function will be called too and the utmp code below | |
861 | * relies on that! */ | |
87f0e418 LP |
862 | |
863 | if (!UNIT_IS_ACTIVE_OR_RELOADING(os) && UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
864 | u->meta.active_enter_timestamp = now(CLOCK_REALTIME); | |
865 | else if (UNIT_IS_ACTIVE_OR_RELOADING(os) && !UNIT_IS_ACTIVE_OR_RELOADING(ns)) | |
866 | u->meta.active_exit_timestamp = now(CLOCK_REALTIME); | |
867 | ||
868 | if (u->meta.job) { | |
869 | ||
870 | if (u->meta.job->state == JOB_WAITING) | |
871 | ||
872 | /* So we reached a different state for this | |
873 | * job. Let's see if we can run it now if it | |
874 | * failed previously due to EAGAIN. */ | |
c1e1601e | 875 | job_add_to_run_queue(u->meta.job); |
87f0e418 LP |
876 | |
877 | else { | |
878 | assert(u->meta.job->state == JOB_RUNNING); | |
879 | ||
f50e0a01 | 880 | /* Let's check whether this state change |
87f0e418 LP |
881 | * constitutes a finished job, or maybe |
882 | * cotradicts a running job and hence needs to | |
883 | * invalidate jobs. */ | |
884 | ||
885 | switch (u->meta.job->type) { | |
886 | ||
887 | case JOB_START: | |
888 | case JOB_VERIFY_ACTIVE: | |
889 | ||
a096ed36 | 890 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) |
87f0e418 | 891 | job_finish_and_invalidate(u->meta.job, true); |
a096ed36 LP |
892 | else if (ns != UNIT_ACTIVATING) { |
893 | unexpected = true; | |
87f0e418 | 894 | job_finish_and_invalidate(u->meta.job, false); |
a096ed36 | 895 | } |
87f0e418 LP |
896 | |
897 | break; | |
898 | ||
899 | case JOB_RELOAD: | |
900 | case JOB_RELOAD_OR_START: | |
901 | ||
a096ed36 | 902 | if (ns == UNIT_ACTIVE) |
87f0e418 | 903 | job_finish_and_invalidate(u->meta.job, true); |
a096ed36 LP |
904 | else if (ns != UNIT_ACTIVATING && ns != UNIT_ACTIVE_RELOADING) { |
905 | unexpected = true; | |
87f0e418 | 906 | job_finish_and_invalidate(u->meta.job, false); |
a096ed36 | 907 | } |
87f0e418 LP |
908 | |
909 | break; | |
910 | ||
911 | case JOB_STOP: | |
912 | case JOB_RESTART: | |
913 | case JOB_TRY_RESTART: | |
914 | ||
a096ed36 | 915 | if (ns == UNIT_INACTIVE) |
87f0e418 | 916 | job_finish_and_invalidate(u->meta.job, true); |
a096ed36 LP |
917 | else if (ns != UNIT_DEACTIVATING) { |
918 | unexpected = true; | |
87f0e418 | 919 | job_finish_and_invalidate(u->meta.job, false); |
a096ed36 | 920 | } |
87f0e418 LP |
921 | |
922 | break; | |
923 | ||
924 | default: | |
925 | assert_not_reached("Job type unknown"); | |
926 | } | |
927 | } | |
928 | } | |
929 | ||
930 | /* If this state change happened without being requested by a | |
931 | * job, then let's retroactively start or stop dependencies */ | |
932 | ||
a096ed36 LP |
933 | if (unexpected) { |
934 | if (UNIT_IS_INACTIVE_OR_DEACTIVATING(os) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns)) | |
935 | retroactively_start_dependencies(u); | |
936 | else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns)) | |
937 | retroactively_stop_dependencies(u); | |
938 | } | |
f3bff0eb | 939 | |
e537352b LP |
940 | /* Some names are special */ |
941 | if (UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d | 942 | if (unit_has_name(u, SPECIAL_DBUS_SERVICE)) { |
e537352b LP |
943 | /* The bus just might have become available, |
944 | * hence try to connect to it, if we aren't | |
945 | * yet connected. */ | |
f278026d LP |
946 | bus_init_system(u->meta.manager); |
947 | bus_init_api(u->meta.manager); | |
948 | } | |
949 | ||
e537352b LP |
950 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) |
951 | /* The syslog daemon just might have become | |
952 | * available, hence try to connect to it, if | |
953 | * we aren't yet connected. */ | |
2882c7ed | 954 | log_open_syslog(); |
f278026d | 955 | |
e537352b LP |
956 | if (u->meta.type == UNIT_MOUNT) |
957 | /* Another directory became available, let's | |
958 | * check if that is enough to write our utmp | |
959 | * entry. */ | |
960 | manager_write_utmp_reboot(u->meta.manager); | |
961 | ||
962 | if (u->meta.type == UNIT_TARGET) | |
963 | /* A target got activated, maybe this is a runlevel? */ | |
964 | manager_write_utmp_runlevel(u->meta.manager, u); | |
965 | ||
966 | } else if (!UNIT_IS_ACTIVE_OR_RELOADING(ns)) { | |
f278026d LP |
967 | |
968 | if (unit_has_name(u, SPECIAL_SYSLOG_SERVICE)) | |
e537352b LP |
969 | /* The syslog daemon might just have |
970 | * terminated, hence try to disconnect from | |
971 | * it. */ | |
2882c7ed | 972 | log_close_syslog(); |
f278026d LP |
973 | |
974 | /* We don't care about D-Bus here, since we'll get an | |
975 | * asynchronous notification for it anyway. */ | |
976 | } | |
977 | ||
f3bff0eb LP |
978 | /* Maybe we finished startup and are now ready for being |
979 | * stopped because unneeded? */ | |
980 | unit_check_uneeded(u); | |
c1e1601e LP |
981 | |
982 | unit_add_to_dbus_queue(u); | |
87f0e418 LP |
983 | } |
984 | ||
acbb0225 | 985 | int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w) { |
87f0e418 LP |
986 | struct epoll_event ev; |
987 | ||
988 | assert(u); | |
989 | assert(fd >= 0); | |
acbb0225 | 990 | assert(w); |
ea430986 | 991 | assert(w->type == WATCH_INVALID || (w->type == WATCH_FD && w->fd == fd && w->data.unit == u)); |
87f0e418 LP |
992 | |
993 | zero(ev); | |
acbb0225 | 994 | ev.data.ptr = w; |
87f0e418 LP |
995 | ev.events = events; |
996 | ||
acbb0225 LP |
997 | if (epoll_ctl(u->meta.manager->epoll_fd, |
998 | w->type == WATCH_INVALID ? EPOLL_CTL_ADD : EPOLL_CTL_MOD, | |
999 | fd, | |
1000 | &ev) < 0) | |
1001 | return -errno; | |
87f0e418 | 1002 | |
acbb0225 LP |
1003 | w->fd = fd; |
1004 | w->type = WATCH_FD; | |
ea430986 | 1005 | w->data.unit = u; |
87f0e418 | 1006 | |
acbb0225 | 1007 | return 0; |
87f0e418 LP |
1008 | } |
1009 | ||
acbb0225 | 1010 | void unit_unwatch_fd(Unit *u, Watch *w) { |
87f0e418 | 1011 | assert(u); |
acbb0225 | 1012 | assert(w); |
87f0e418 | 1013 | |
acbb0225 LP |
1014 | if (w->type == WATCH_INVALID) |
1015 | return; | |
1016 | ||
ea430986 LP |
1017 | assert(w->type == WATCH_FD); |
1018 | assert(w->data.unit == u); | |
acbb0225 LP |
1019 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
1020 | ||
1021 | w->fd = -1; | |
1022 | w->type = WATCH_INVALID; | |
ea430986 | 1023 | w->data.unit = NULL; |
87f0e418 LP |
1024 | } |
1025 | ||
1026 | int unit_watch_pid(Unit *u, pid_t pid) { | |
1027 | assert(u); | |
1028 | assert(pid >= 1); | |
1029 | ||
1030 | return hashmap_put(u->meta.manager->watch_pids, UINT32_TO_PTR(pid), u); | |
1031 | } | |
1032 | ||
1033 | void unit_unwatch_pid(Unit *u, pid_t pid) { | |
1034 | assert(u); | |
1035 | assert(pid >= 1); | |
1036 | ||
1037 | hashmap_remove(u->meta.manager->watch_pids, UINT32_TO_PTR(pid)); | |
1038 | } | |
1039 | ||
acbb0225 | 1040 | int unit_watch_timer(Unit *u, usec_t delay, Watch *w) { |
87f0e418 | 1041 | struct itimerspec its; |
acbb0225 | 1042 | int flags, fd; |
87f0e418 LP |
1043 | bool ours; |
1044 | ||
1045 | assert(u); | |
acbb0225 | 1046 | assert(w); |
ea430986 | 1047 | assert(w->type == WATCH_INVALID || (w->type == WATCH_TIMER && w->data.unit == u)); |
87f0e418 LP |
1048 | |
1049 | /* This will try to reuse the old timer if there is one */ | |
1050 | ||
acbb0225 | 1051 | if (w->type == WATCH_TIMER) { |
87f0e418 | 1052 | ours = false; |
acbb0225 | 1053 | fd = w->fd; |
87f0e418 LP |
1054 | } else { |
1055 | ours = true; | |
87f0e418 LP |
1056 | if ((fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
1057 | return -errno; | |
1058 | } | |
1059 | ||
1060 | zero(its); | |
1061 | ||
1062 | if (delay <= 0) { | |
1063 | /* Set absolute time in the past, but not 0, since we | |
1064 | * don't want to disarm the timer */ | |
1065 | its.it_value.tv_sec = 0; | |
1066 | its.it_value.tv_nsec = 1; | |
1067 | ||
1068 | flags = TFD_TIMER_ABSTIME; | |
1069 | } else { | |
1070 | timespec_store(&its.it_value, delay); | |
1071 | flags = 0; | |
1072 | } | |
1073 | ||
1074 | /* This will also flush the elapse counter */ | |
1075 | if (timerfd_settime(fd, flags, &its, NULL) < 0) | |
1076 | goto fail; | |
1077 | ||
acbb0225 LP |
1078 | if (w->type == WATCH_INVALID) { |
1079 | struct epoll_event ev; | |
87f0e418 | 1080 | |
acbb0225 LP |
1081 | zero(ev); |
1082 | ev.data.ptr = w; | |
f94ea366 | 1083 | ev.events = EPOLLIN; |
acbb0225 LP |
1084 | |
1085 | if (epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) | |
1086 | goto fail; | |
1087 | } | |
1088 | ||
1089 | w->fd = fd; | |
1090 | w->type = WATCH_TIMER; | |
ea430986 | 1091 | w->data.unit = u; |
87f0e418 | 1092 | |
87f0e418 LP |
1093 | return 0; |
1094 | ||
1095 | fail: | |
1096 | if (ours) | |
ea430986 | 1097 | close_nointr_nofail(fd); |
87f0e418 LP |
1098 | |
1099 | return -errno; | |
1100 | } | |
1101 | ||
acbb0225 | 1102 | void unit_unwatch_timer(Unit *u, Watch *w) { |
87f0e418 | 1103 | assert(u); |
acbb0225 | 1104 | assert(w); |
87f0e418 | 1105 | |
acbb0225 | 1106 | if (w->type == WATCH_INVALID) |
87f0e418 LP |
1107 | return; |
1108 | ||
ea430986 | 1109 | assert(w->type == WATCH_TIMER && w->data.unit == u); |
acbb0225 LP |
1110 | |
1111 | assert_se(epoll_ctl(u->meta.manager->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
1112 | assert_se(close_nointr(w->fd) == 0); | |
1113 | ||
1114 | w->fd = -1; | |
1115 | w->type = WATCH_INVALID; | |
ea430986 | 1116 | w->data.unit = NULL; |
87f0e418 LP |
1117 | } |
1118 | ||
1119 | bool unit_job_is_applicable(Unit *u, JobType j) { | |
1120 | assert(u); | |
1121 | assert(j >= 0 && j < _JOB_TYPE_MAX); | |
1122 | ||
1123 | switch (j) { | |
1124 | ||
1125 | case JOB_VERIFY_ACTIVE: | |
1126 | case JOB_START: | |
1127 | return true; | |
1128 | ||
1129 | case JOB_STOP: | |
1130 | case JOB_RESTART: | |
1131 | case JOB_TRY_RESTART: | |
1132 | return unit_can_start(u); | |
1133 | ||
1134 | case JOB_RELOAD: | |
1135 | return unit_can_reload(u); | |
1136 | ||
1137 | case JOB_RELOAD_OR_START: | |
1138 | return unit_can_reload(u) && unit_can_start(u); | |
1139 | ||
1140 | default: | |
1141 | assert_not_reached("Invalid job type"); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | int unit_add_dependency(Unit *u, UnitDependency d, Unit *other) { | |
1146 | ||
1147 | static const UnitDependency inverse_table[_UNIT_DEPENDENCY_MAX] = { | |
1148 | [UNIT_REQUIRES] = UNIT_REQUIRED_BY, | |
1149 | [UNIT_SOFT_REQUIRES] = UNIT_SOFT_REQUIRED_BY, | |
1150 | [UNIT_WANTS] = UNIT_WANTED_BY, | |
1151 | [UNIT_REQUISITE] = UNIT_REQUIRED_BY, | |
1152 | [UNIT_SOFT_REQUISITE] = UNIT_SOFT_REQUIRED_BY, | |
1153 | [UNIT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, | |
1154 | [UNIT_SOFT_REQUIRED_BY] = _UNIT_DEPENDENCY_INVALID, | |
1155 | [UNIT_WANTED_BY] = _UNIT_DEPENDENCY_INVALID, | |
1156 | [UNIT_CONFLICTS] = UNIT_CONFLICTS, | |
1157 | [UNIT_BEFORE] = UNIT_AFTER, | |
1158 | [UNIT_AFTER] = UNIT_BEFORE | |
1159 | }; | |
1160 | int r; | |
1161 | ||
1162 | assert(u); | |
1163 | assert(d >= 0 && d < _UNIT_DEPENDENCY_MAX); | |
1164 | assert(inverse_table[d] != _UNIT_DEPENDENCY_INVALID); | |
1165 | assert(other); | |
1166 | ||
1167 | /* We won't allow dependencies on ourselves. We will not | |
1168 | * consider them an error however. */ | |
1169 | if (u == other) | |
1170 | return 0; | |
1171 | ||
1172 | if ((r = set_ensure_allocated(&u->meta.dependencies[d], trivial_hash_func, trivial_compare_func)) < 0) | |
1173 | return r; | |
1174 | ||
1175 | if ((r = set_ensure_allocated(&other->meta.dependencies[inverse_table[d]], trivial_hash_func, trivial_compare_func)) < 0) | |
1176 | return r; | |
1177 | ||
1178 | if ((r = set_put(u->meta.dependencies[d], other)) < 0) | |
1179 | return r; | |
1180 | ||
1181 | if ((r = set_put(other->meta.dependencies[inverse_table[d]], u)) < 0) { | |
1182 | set_remove(u->meta.dependencies[d], other); | |
1183 | return r; | |
1184 | } | |
1185 | ||
c1e1601e | 1186 | unit_add_to_dbus_queue(u); |
87f0e418 LP |
1187 | return 0; |
1188 | } | |
0301abf4 | 1189 | |
09b6b09f LP |
1190 | int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name) { |
1191 | Unit *other; | |
1192 | int r; | |
1193 | ||
1194 | if ((r = manager_load_unit(u->meta.manager, name, &other)) < 0) | |
1195 | return r; | |
1196 | ||
1197 | if ((r = unit_add_dependency(u, d, other)) < 0) | |
1198 | return r; | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | ||
bd77d0fc LP |
1203 | int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name) { |
1204 | Unit *other; | |
1205 | int r; | |
1206 | ||
1207 | if ((r = manager_load_unit(u->meta.manager, name, &other)) < 0) | |
1208 | return r; | |
1209 | ||
1210 | if ((r = unit_add_dependency(other, d, u)) < 0) | |
1211 | return r; | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
0301abf4 LP |
1216 | int set_unit_path(const char *p) { |
1217 | char *cwd, *c; | |
1218 | int r; | |
1219 | ||
1220 | /* This is mostly for debug purposes */ | |
1221 | ||
1222 | if (path_is_absolute(p)) { | |
1223 | if (!(c = strdup(p))) | |
1224 | return -ENOMEM; | |
1225 | } else { | |
1226 | if (!(cwd = get_current_dir_name())) | |
1227 | return -errno; | |
1228 | ||
1229 | r = asprintf(&c, "%s/%s", cwd, p); | |
1230 | free(cwd); | |
1231 | ||
1232 | if (r < 0) | |
1233 | return -ENOMEM; | |
1234 | } | |
1235 | ||
036643a2 | 1236 | if (setenv("SYSTEMD_UNIT_PATH", c, 0) < 0) { |
0301abf4 LP |
1237 | r = -errno; |
1238 | free(c); | |
1239 | return r; | |
1240 | } | |
1241 | ||
1242 | return 0; | |
1243 | } | |
88066b3a | 1244 | |
2e478a46 | 1245 | char *unit_name_escape_path(const char *path, const char *suffix) { |
88066b3a LP |
1246 | char *r, *t; |
1247 | const char *f; | |
2e478a46 | 1248 | size_t a, b; |
88066b3a LP |
1249 | |
1250 | assert(path); | |
88066b3a | 1251 | |
b08d03ff LP |
1252 | /* Takes a path and a suffix and prefix and makes a nice |
1253 | * string suitable as unit name of it, escaping all weird | |
1254 | * chars on the way. | |
88066b3a | 1255 | * |
b08d03ff LP |
1256 | * / becomes ., and all chars not alloweed in a unit name get |
1257 | * escaped as \xFF, including \ and ., of course. This | |
1258 | * escaping is hence reversible. | |
88066b3a LP |
1259 | */ |
1260 | ||
b08d03ff LP |
1261 | if (!suffix) |
1262 | suffix = ""; | |
88066b3a | 1263 | |
2e478a46 LP |
1264 | a = strlen(path); |
1265 | b = strlen(suffix); | |
b08d03ff | 1266 | |
2e478a46 | 1267 | if (!(r = new(char, a*4+b+1))) |
88066b3a LP |
1268 | return NULL; |
1269 | ||
2e478a46 | 1270 | for (f = path, t = r; *f; f++) { |
88066b3a | 1271 | if (*f == '/') |
b08d03ff LP |
1272 | *(t++) = '.'; |
1273 | else if (*f == '.' || *f == '\\' || !strchr(VALID_CHARS, *f)) { | |
88066b3a LP |
1274 | *(t++) = '\\'; |
1275 | *(t++) = 'x'; | |
1276 | *(t++) = hexchar(*f > 4); | |
1277 | *(t++) = hexchar(*f); | |
1278 | } else | |
1279 | *(t++) = *f; | |
1280 | } | |
1281 | ||
2e478a46 | 1282 | memcpy(t, suffix, b+1); |
88066b3a LP |
1283 | |
1284 | return r; | |
1285 | } | |
94f04347 | 1286 | |
ea430986 LP |
1287 | char *unit_dbus_path(Unit *u) { |
1288 | char *p, *e; | |
1289 | ||
1290 | assert(u); | |
1291 | ||
1292 | if (!(e = bus_path_escape(unit_id(u)))) | |
1293 | return NULL; | |
1294 | ||
1295 | if (asprintf(&p, "/org/freedesktop/systemd1/unit/%s", e) < 0) { | |
1296 | free(e); | |
1297 | return NULL; | |
1298 | } | |
1299 | ||
1300 | free(e); | |
1301 | return p; | |
1302 | } | |
1303 | ||
8e274523 LP |
1304 | int unit_add_cgroup(Unit *u, CGroupBonding *b) { |
1305 | CGroupBonding *l; | |
1306 | int r; | |
1307 | ||
1308 | assert(u); | |
1309 | assert(b); | |
1310 | assert(b->path); | |
1311 | ||
1312 | /* Ensure this hasn't been added yet */ | |
1313 | assert(!b->unit); | |
1314 | ||
1315 | l = hashmap_get(u->meta.manager->cgroup_bondings, b->path); | |
1316 | LIST_PREPEND(CGroupBonding, by_path, l, b); | |
1317 | ||
1318 | if ((r = hashmap_replace(u->meta.manager->cgroup_bondings, b->path, l)) < 0) { | |
1319 | LIST_REMOVE(CGroupBonding, by_path, l, b); | |
1320 | return r; | |
1321 | } | |
1322 | ||
1323 | LIST_PREPEND(CGroupBonding, by_unit, u->meta.cgroup_bondings, b); | |
1324 | b->unit = u; | |
1325 | ||
1326 | return 0; | |
1327 | } | |
1328 | ||
013b87c0 LP |
1329 | static char *default_cgroup_path(Unit *u) { |
1330 | char *p; | |
1331 | ||
1332 | assert(u); | |
1333 | ||
1334 | if (asprintf(&p, "%s/%s", u->meta.manager->cgroup_hierarchy, unit_id(u)) < 0) | |
1335 | return NULL; | |
1336 | ||
1337 | return p; | |
1338 | } | |
1339 | ||
8e274523 LP |
1340 | int unit_add_cgroup_from_text(Unit *u, const char *name) { |
1341 | size_t n; | |
013b87c0 LP |
1342 | char *controller = NULL, *path = NULL; |
1343 | CGroupBonding *b = NULL; | |
8e274523 LP |
1344 | int r; |
1345 | ||
1346 | assert(u); | |
1347 | assert(name); | |
1348 | ||
1349 | /* Detect controller name */ | |
013b87c0 | 1350 | n = strcspn(name, ":"); |
8e274523 | 1351 | |
013b87c0 LP |
1352 | if (name[n] == 0 || |
1353 | (name[n] == ':' && name[n+1] == 0)) { | |
8e274523 | 1354 | |
013b87c0 | 1355 | /* Only controller name, no path? */ |
8e274523 | 1356 | |
013b87c0 LP |
1357 | if (!(path = default_cgroup_path(u))) |
1358 | return -ENOMEM; | |
8e274523 | 1359 | |
013b87c0 LP |
1360 | } else { |
1361 | const char *p; | |
8e274523 | 1362 | |
013b87c0 LP |
1363 | /* Controller name, and path. */ |
1364 | p = name+n+1; | |
8e274523 | 1365 | |
013b87c0 LP |
1366 | if (!path_is_absolute(p)) |
1367 | return -EINVAL; | |
1368 | ||
1369 | if (!(path = strdup(p))) | |
1370 | return -ENOMEM; | |
8e274523 LP |
1371 | } |
1372 | ||
013b87c0 LP |
1373 | if (n > 0) |
1374 | controller = strndup(name, n); | |
1375 | else | |
1376 | controller = strdup(u->meta.manager->cgroup_controller); | |
1377 | ||
1378 | if (!controller) { | |
1379 | r = -ENOMEM; | |
1380 | goto fail; | |
8e274523 LP |
1381 | } |
1382 | ||
013b87c0 LP |
1383 | if (cgroup_bonding_find_list(u->meta.cgroup_bondings, controller)) { |
1384 | r = -EEXIST; | |
1385 | goto fail; | |
1386 | } | |
8e274523 | 1387 | |
013b87c0 | 1388 | if (!(b = new0(CGroupBonding, 1))) { |
8e274523 LP |
1389 | r = -ENOMEM; |
1390 | goto fail; | |
1391 | } | |
1392 | ||
013b87c0 LP |
1393 | b->controller = controller; |
1394 | b->path = path; | |
8e274523 LP |
1395 | b->only_us = false; |
1396 | b->clean_up = false; | |
1397 | ||
1398 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1399 | goto fail; | |
1400 | ||
1401 | return 0; | |
1402 | ||
1403 | fail: | |
013b87c0 LP |
1404 | free(path); |
1405 | free(controller); | |
8e274523 LP |
1406 | free(b); |
1407 | ||
1408 | return r; | |
1409 | } | |
1410 | ||
1411 | int unit_add_default_cgroup(Unit *u) { | |
1412 | CGroupBonding *b; | |
1413 | int r = -ENOMEM; | |
1414 | ||
1415 | assert(u); | |
1416 | ||
1417 | /* Adds in the default cgroup data, if it wasn't specified yet */ | |
1418 | ||
1419 | if (unit_get_default_cgroup(u)) | |
1420 | return 0; | |
1421 | ||
1422 | if (!(b = new0(CGroupBonding, 1))) | |
1423 | return -ENOMEM; | |
1424 | ||
1425 | if (!(b->controller = strdup(u->meta.manager->cgroup_controller))) | |
1426 | goto fail; | |
1427 | ||
013b87c0 | 1428 | if (!(b->path = default_cgroup_path(u))) |
8e274523 LP |
1429 | goto fail; |
1430 | ||
1431 | b->clean_up = true; | |
1432 | b->only_us = true; | |
1433 | ||
1434 | if ((r = unit_add_cgroup(u, b)) < 0) | |
1435 | goto fail; | |
1436 | ||
1437 | return 0; | |
1438 | ||
1439 | fail: | |
1440 | free(b->path); | |
1441 | free(b->controller); | |
1442 | free(b); | |
1443 | ||
1444 | return r; | |
1445 | } | |
1446 | ||
1447 | CGroupBonding* unit_get_default_cgroup(Unit *u) { | |
1448 | assert(u); | |
1449 | ||
1450 | return cgroup_bonding_find_list(u->meta.cgroup_bondings, u->meta.manager->cgroup_controller); | |
1451 | } | |
1452 | ||
f6ff8c29 LP |
1453 | int unit_load_related_unit(Unit *u, const char *type, Unit **_found) { |
1454 | char *t; | |
1455 | int r; | |
1456 | ||
1457 | assert(u); | |
1458 | assert(type); | |
1459 | assert(_found); | |
1460 | ||
1461 | if (!(t = unit_name_change_suffix(unit_id(u), type))) | |
1462 | return -ENOMEM; | |
1463 | ||
1464 | assert(!unit_has_name(u, t)); | |
1465 | ||
1466 | r = manager_load_unit(u->meta.manager, t, _found); | |
1467 | free(t); | |
1468 | ||
1469 | if (r >= 0) | |
1470 | assert(*_found != u); | |
1471 | ||
1472 | return r; | |
1473 | } | |
1474 | ||
94f04347 LP |
1475 | static const char* const unit_type_table[_UNIT_TYPE_MAX] = { |
1476 | [UNIT_SERVICE] = "service", | |
1477 | [UNIT_TIMER] = "timer", | |
1478 | [UNIT_SOCKET] = "socket", | |
1479 | [UNIT_TARGET] = "target", | |
1480 | [UNIT_DEVICE] = "device", | |
1481 | [UNIT_MOUNT] = "mount", | |
1482 | [UNIT_AUTOMOUNT] = "automount", | |
1483 | [UNIT_SNAPSHOT] = "snapshot" | |
1484 | }; | |
1485 | ||
1486 | DEFINE_STRING_TABLE_LOOKUP(unit_type, UnitType); | |
1487 | ||
1488 | static const char* const unit_load_state_table[_UNIT_LOAD_STATE_MAX] = { | |
1489 | [UNIT_STUB] = "stub", | |
1490 | [UNIT_LOADED] = "loaded", | |
23a177ef LP |
1491 | [UNIT_FAILED] = "failed", |
1492 | [UNIT_MERGED] = "merged" | |
94f04347 LP |
1493 | }; |
1494 | ||
1495 | DEFINE_STRING_TABLE_LOOKUP(unit_load_state, UnitLoadState); | |
1496 | ||
1497 | static const char* const unit_active_state_table[_UNIT_ACTIVE_STATE_MAX] = { | |
1498 | [UNIT_ACTIVE] = "active", | |
1499 | [UNIT_INACTIVE] = "inactive", | |
1500 | [UNIT_ACTIVATING] = "activating", | |
1501 | [UNIT_DEACTIVATING] = "deactivating" | |
1502 | }; | |
1503 | ||
1504 | DEFINE_STRING_TABLE_LOOKUP(unit_active_state, UnitActiveState); | |
1505 | ||
1506 | static const char* const unit_dependency_table[_UNIT_DEPENDENCY_MAX] = { | |
1507 | [UNIT_REQUIRES] = "Requires", | |
1508 | [UNIT_SOFT_REQUIRES] = "SoftRequires", | |
1509 | [UNIT_WANTS] = "Wants", | |
1510 | [UNIT_REQUISITE] = "Requisite", | |
1511 | [UNIT_SOFT_REQUISITE] = "SoftRequisite", | |
1512 | [UNIT_REQUIRED_BY] = "RequiredBy", | |
1513 | [UNIT_SOFT_REQUIRED_BY] = "SoftRequiredBy", | |
1514 | [UNIT_WANTED_BY] = "WantedBy", | |
1515 | [UNIT_CONFLICTS] = "Conflicts", | |
1516 | [UNIT_BEFORE] = "Before", | |
1517 | [UNIT_AFTER] = "After", | |
1518 | }; | |
1519 | ||
1520 | DEFINE_STRING_TABLE_LOOKUP(unit_dependency, UnitDependency); | |
50159e6a LP |
1521 | |
1522 | static const char* const kill_mode_table[_KILL_MODE_MAX] = { | |
1523 | [KILL_PROCESS] = "process", | |
1524 | [KILL_PROCESS_GROUP] = "process-group", | |
1525 | [KILL_CONTROL_GROUP] = "control-group" | |
1526 | }; | |
1527 | ||
1528 | DEFINE_STRING_TABLE_LOOKUP(kill_mode, KillMode); |