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f8e2fb7b LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
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 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <fcntl.h> | |
f8e2fb7b | 24 | #include <string.h> |
f8e2fb7b LP |
25 | #include <unistd.h> |
26 | ||
27 | #include "util.h" | |
28 | #include "mkdir.h" | |
f8e2fb7b | 29 | #include "logind-inhibit.h" |
a5c32cff | 30 | #include "fileio.h" |
6482f626 | 31 | #include "formats-util.h" |
f8e2fb7b LP |
32 | |
33 | Inhibitor* inhibitor_new(Manager *m, const char* id) { | |
34 | Inhibitor *i; | |
35 | ||
36 | assert(m); | |
37 | ||
38 | i = new0(Inhibitor, 1); | |
39 | if (!i) | |
40 | return NULL; | |
41 | ||
42 | i->state_file = strappend("/run/systemd/inhibit/", id); | |
43 | if (!i->state_file) { | |
44 | free(i); | |
45 | return NULL; | |
46 | } | |
47 | ||
2b6bf07d | 48 | i->id = basename(i->state_file); |
f8e2fb7b LP |
49 | |
50 | if (hashmap_put(m->inhibitors, i->id, i) < 0) { | |
51 | free(i->state_file); | |
52 | free(i); | |
53 | return NULL; | |
54 | } | |
55 | ||
56 | i->manager = m; | |
57 | i->fifo_fd = -1; | |
58 | ||
59 | return i; | |
60 | } | |
61 | ||
62 | void inhibitor_free(Inhibitor *i) { | |
63 | assert(i); | |
64 | ||
f8e2fb7b | 65 | hashmap_remove(i->manager->inhibitors, i->id); |
cc377381 | 66 | |
f8e2fb7b LP |
67 | inhibitor_remove_fifo(i); |
68 | ||
cc377381 LP |
69 | free(i->who); |
70 | free(i->why); | |
71 | ||
f8e2fb7b LP |
72 | if (i->state_file) { |
73 | unlink(i->state_file); | |
74 | free(i->state_file); | |
75 | } | |
76 | ||
77 | free(i); | |
78 | } | |
79 | ||
80 | int inhibitor_save(Inhibitor *i) { | |
cc377381 LP |
81 | _cleanup_free_ char *temp_path = NULL; |
82 | _cleanup_fclose_ FILE *f = NULL; | |
f8e2fb7b | 83 | int r; |
f8e2fb7b LP |
84 | |
85 | assert(i); | |
86 | ||
d2e54fae | 87 | r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0); |
f8e2fb7b | 88 | if (r < 0) |
dacd6cee | 89 | goto fail; |
f8e2fb7b LP |
90 | |
91 | r = fopen_temporary(i->state_file, &f, &temp_path); | |
92 | if (r < 0) | |
dacd6cee | 93 | goto fail; |
f8e2fb7b LP |
94 | |
95 | fchmod(fileno(f), 0644); | |
96 | ||
97 | fprintf(f, | |
98 | "# This is private data. Do not parse.\n" | |
99 | "WHAT=%s\n" | |
eecd1362 | 100 | "MODE=%s\n" |
90b2de37 ZJS |
101 | "UID="UID_FMT"\n" |
102 | "PID="PID_FMT"\n", | |
f8e2fb7b | 103 | inhibit_what_to_string(i->what), |
eecd1362 | 104 | inhibit_mode_to_string(i->mode), |
90b2de37 ZJS |
105 | i->uid, |
106 | i->pid); | |
f8e2fb7b LP |
107 | |
108 | if (i->who) { | |
cc377381 LP |
109 | _cleanup_free_ char *cc = NULL; |
110 | ||
f8e2fb7b LP |
111 | cc = cescape(i->who); |
112 | if (!cc) | |
113 | r = -ENOMEM; | |
cc377381 | 114 | else |
f8e2fb7b | 115 | fprintf(f, "WHO=%s\n", cc); |
f8e2fb7b LP |
116 | } |
117 | ||
118 | if (i->why) { | |
cc377381 LP |
119 | _cleanup_free_ char *cc = NULL; |
120 | ||
f8e2fb7b LP |
121 | cc = cescape(i->why); |
122 | if (!cc) | |
123 | r = -ENOMEM; | |
cc377381 | 124 | else |
f8e2fb7b | 125 | fprintf(f, "WHY=%s\n", cc); |
f8e2fb7b LP |
126 | } |
127 | ||
128 | if (i->fifo_path) | |
129 | fprintf(f, "FIFO=%s\n", i->fifo_path); | |
130 | ||
dacd6cee LP |
131 | r = fflush_and_check(f); |
132 | if (r < 0) | |
133 | goto fail; | |
f8e2fb7b | 134 | |
dacd6cee | 135 | if (rename(temp_path, i->state_file) < 0) { |
f8e2fb7b | 136 | r = -errno; |
dacd6cee | 137 | goto fail; |
f8e2fb7b LP |
138 | } |
139 | ||
dacd6cee LP |
140 | return 0; |
141 | ||
142 | fail: | |
143 | (void) unlink(i->state_file); | |
144 | ||
145 | if (temp_path) | |
146 | (void) unlink(temp_path); | |
f8e2fb7b | 147 | |
dacd6cee | 148 | return log_error_errno(r, "Failed to save inhibit data %s: %m", i->state_file); |
f8e2fb7b LP |
149 | } |
150 | ||
151 | int inhibitor_start(Inhibitor *i) { | |
152 | assert(i); | |
153 | ||
154 | if (i->started) | |
155 | return 0; | |
156 | ||
c7b5eb98 LP |
157 | dual_timestamp_get(&i->since); |
158 | ||
de0671ee | 159 | log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s started.", |
f8e2fb7b | 160 | strna(i->who), strna(i->why), |
de0671ee | 161 | i->pid, i->uid, |
eecd1362 | 162 | inhibit_mode_to_string(i->mode)); |
f8e2fb7b LP |
163 | |
164 | inhibitor_save(i); | |
165 | ||
166 | i->started = true; | |
167 | ||
cc377381 | 168 | manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL); |
f8e2fb7b LP |
169 | |
170 | return 0; | |
171 | } | |
172 | ||
173 | int inhibitor_stop(Inhibitor *i) { | |
174 | assert(i); | |
175 | ||
176 | if (i->started) | |
de0671ee | 177 | log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s stopped.", |
f8e2fb7b | 178 | strna(i->who), strna(i->why), |
de0671ee | 179 | i->pid, i->uid, |
eecd1362 | 180 | inhibit_mode_to_string(i->mode)); |
f8e2fb7b LP |
181 | |
182 | if (i->state_file) | |
183 | unlink(i->state_file); | |
184 | ||
185 | i->started = false; | |
186 | ||
cc377381 | 187 | manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL); |
f8e2fb7b LP |
188 | |
189 | return 0; | |
190 | } | |
191 | ||
192 | int inhibitor_load(Inhibitor *i) { | |
cc377381 LP |
193 | |
194 | _cleanup_free_ char | |
f8e2fb7b LP |
195 | *what = NULL, |
196 | *uid = NULL, | |
197 | *pid = NULL, | |
198 | *who = NULL, | |
eecd1362 LP |
199 | *why = NULL, |
200 | *mode = NULL; | |
f8e2fb7b | 201 | |
cc377381 LP |
202 | InhibitWhat w; |
203 | InhibitMode mm; | |
204 | char *cc; | |
205 | int r; | |
206 | ||
f8e2fb7b LP |
207 | r = parse_env_file(i->state_file, NEWLINE, |
208 | "WHAT", &what, | |
209 | "UID", &uid, | |
210 | "PID", &pid, | |
211 | "WHO", &who, | |
212 | "WHY", &why, | |
eecd1362 | 213 | "MODE", &mode, |
f8e2fb7b LP |
214 | "FIFO", &i->fifo_path, |
215 | NULL); | |
216 | if (r < 0) | |
cc377381 | 217 | return r; |
f8e2fb7b | 218 | |
eecd1362 | 219 | w = what ? inhibit_what_from_string(what) : 0; |
f8e2fb7b LP |
220 | if (w >= 0) |
221 | i->what = w; | |
222 | ||
eecd1362 LP |
223 | mm = mode ? inhibit_mode_from_string(mode) : INHIBIT_BLOCK; |
224 | if (mm >= 0) | |
225 | i->mode = mm; | |
226 | ||
a34faf57 LN |
227 | if (uid) { |
228 | r = parse_uid(uid, &i->uid); | |
229 | if (r < 0) | |
cc377381 | 230 | return r; |
a34faf57 | 231 | } |
eecd1362 | 232 | |
a34faf57 LN |
233 | if (pid) { |
234 | r = parse_pid(pid, &i->pid); | |
235 | if (r < 0) | |
cc377381 | 236 | return r; |
a34faf57 | 237 | } |
f8e2fb7b LP |
238 | |
239 | if (who) { | |
527b7a42 LP |
240 | r = cunescape(who, 0, &cc); |
241 | if (r < 0) | |
242 | return r; | |
f8e2fb7b LP |
243 | |
244 | free(i->who); | |
245 | i->who = cc; | |
246 | } | |
247 | ||
248 | if (why) { | |
527b7a42 LP |
249 | r = cunescape(why, 0, &cc); |
250 | if (r < 0) | |
251 | return r; | |
f8e2fb7b LP |
252 | |
253 | free(i->why); | |
254 | i->why = cc; | |
255 | } | |
256 | ||
257 | if (i->fifo_path) { | |
258 | int fd; | |
259 | ||
260 | fd = inhibitor_create_fifo(i); | |
03e334a1 | 261 | safe_close(fd); |
f8e2fb7b LP |
262 | } |
263 | ||
cc377381 LP |
264 | return 0; |
265 | } | |
f8e2fb7b | 266 | |
cc377381 LP |
267 | static int inhibitor_dispatch_fifo(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
268 | Inhibitor *i = userdata; | |
269 | ||
270 | assert(s); | |
271 | assert(fd == i->fifo_fd); | |
272 | assert(i); | |
273 | ||
274 | inhibitor_stop(i); | |
275 | inhibitor_free(i); | |
276 | ||
277 | return 0; | |
f8e2fb7b LP |
278 | } |
279 | ||
280 | int inhibitor_create_fifo(Inhibitor *i) { | |
281 | int r; | |
282 | ||
283 | assert(i); | |
284 | ||
285 | /* Create FIFO */ | |
286 | if (!i->fifo_path) { | |
d2e54fae | 287 | r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0); |
f8e2fb7b LP |
288 | if (r < 0) |
289 | return r; | |
290 | ||
cc377381 LP |
291 | i->fifo_path = strjoin("/run/systemd/inhibit/", i->id, ".ref", NULL); |
292 | if (!i->fifo_path) | |
f8e2fb7b LP |
293 | return -ENOMEM; |
294 | ||
295 | if (mkfifo(i->fifo_path, 0600) < 0 && errno != EEXIST) | |
296 | return -errno; | |
297 | } | |
298 | ||
299 | /* Open reading side */ | |
300 | if (i->fifo_fd < 0) { | |
f8e2fb7b LP |
301 | i->fifo_fd = open(i->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY); |
302 | if (i->fifo_fd < 0) | |
303 | return -errno; | |
cc377381 | 304 | } |
f8e2fb7b | 305 | |
cc377381 | 306 | if (!i->event_source) { |
151b9b96 | 307 | r = sd_event_add_io(i->manager->event, &i->event_source, i->fifo_fd, 0, inhibitor_dispatch_fifo, i); |
f8e2fb7b LP |
308 | if (r < 0) |
309 | return r; | |
310 | ||
718db961 | 311 | r = sd_event_source_set_priority(i->event_source, SD_EVENT_PRIORITY_IDLE); |
cc377381 LP |
312 | if (r < 0) |
313 | return r; | |
f8e2fb7b LP |
314 | } |
315 | ||
316 | /* Open writing side */ | |
317 | r = open(i->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY); | |
318 | if (r < 0) | |
319 | return -errno; | |
320 | ||
321 | return r; | |
322 | } | |
323 | ||
324 | void inhibitor_remove_fifo(Inhibitor *i) { | |
325 | assert(i); | |
326 | ||
03e334a1 LP |
327 | i->event_source = sd_event_source_unref(i->event_source); |
328 | i->fifo_fd = safe_close(i->fifo_fd); | |
f8e2fb7b LP |
329 | |
330 | if (i->fifo_path) { | |
331 | unlink(i->fifo_path); | |
332 | free(i->fifo_path); | |
333 | i->fifo_path = NULL; | |
334 | } | |
335 | } | |
336 | ||
eecd1362 | 337 | InhibitWhat manager_inhibit_what(Manager *m, InhibitMode mm) { |
f8e2fb7b LP |
338 | Inhibitor *i; |
339 | Iterator j; | |
340 | InhibitWhat what = 0; | |
341 | ||
342 | assert(m); | |
343 | ||
cc377381 | 344 | HASHMAP_FOREACH(i, m->inhibitors, j) |
eecd1362 LP |
345 | if (i->mode == mm) |
346 | what |= i->what; | |
f8e2fb7b LP |
347 | |
348 | return what; | |
349 | } | |
350 | ||
beaafb2e LP |
351 | static int pid_is_active(Manager *m, pid_t pid) { |
352 | Session *s; | |
353 | int r; | |
354 | ||
355 | r = manager_get_session_by_pid(m, pid, &s); | |
2c4f86c1 | 356 | if (r < 0) |
beaafb2e LP |
357 | return r; |
358 | ||
2c4f86c1 LP |
359 | /* If there's no session assigned to it, then it's globally |
360 | * active on all ttys */ | |
361 | if (r == 0) | |
362 | return 1; | |
363 | ||
beaafb2e LP |
364 | return session_is_active(s); |
365 | } | |
366 | ||
367 | bool manager_is_inhibited( | |
368 | Manager *m, | |
369 | InhibitWhat w, | |
370 | InhibitMode mm, | |
371 | dual_timestamp *since, | |
409133be LP |
372 | bool ignore_inactive, |
373 | bool ignore_uid, | |
85a428c6 LP |
374 | uid_t uid, |
375 | Inhibitor **offending) { | |
beaafb2e | 376 | |
c7b5eb98 LP |
377 | Inhibitor *i; |
378 | Iterator j; | |
5cb14b37 | 379 | struct dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
c7b5eb98 LP |
380 | bool inhibited = false; |
381 | ||
382 | assert(m); | |
383 | assert(w > 0 && w < _INHIBIT_WHAT_MAX); | |
384 | ||
cc377381 | 385 | HASHMAP_FOREACH(i, m->inhibitors, j) { |
c7b5eb98 LP |
386 | if (!(i->what & w)) |
387 | continue; | |
388 | ||
eecd1362 LP |
389 | if (i->mode != mm) |
390 | continue; | |
391 | ||
409133be LP |
392 | if (ignore_inactive && pid_is_active(m, i->pid) <= 0) |
393 | continue; | |
394 | ||
395 | if (ignore_uid && i->uid == uid) | |
beaafb2e LP |
396 | continue; |
397 | ||
c7b5eb98 LP |
398 | if (!inhibited || |
399 | i->since.monotonic < ts.monotonic) | |
400 | ts = i->since; | |
401 | ||
402 | inhibited = true; | |
85a428c6 LP |
403 | |
404 | if (offending) | |
405 | *offending = i; | |
c7b5eb98 LP |
406 | } |
407 | ||
408 | if (since) | |
409 | *since = ts; | |
410 | ||
411 | return inhibited; | |
412 | } | |
413 | ||
f8e2fb7b | 414 | const char *inhibit_what_to_string(InhibitWhat w) { |
ec202eae | 415 | static thread_local char buffer[97]; |
beaafb2e | 416 | char *p; |
f8e2fb7b LP |
417 | |
418 | if (w < 0 || w >= _INHIBIT_WHAT_MAX) | |
419 | return NULL; | |
420 | ||
beaafb2e LP |
421 | p = buffer; |
422 | if (w & INHIBIT_SHUTDOWN) | |
423 | p = stpcpy(p, "shutdown:"); | |
424 | if (w & INHIBIT_SLEEP) | |
425 | p = stpcpy(p, "sleep:"); | |
426 | if (w & INHIBIT_IDLE) | |
427 | p = stpcpy(p, "idle:"); | |
428 | if (w & INHIBIT_HANDLE_POWER_KEY) | |
429 | p = stpcpy(p, "handle-power-key:"); | |
8e7fd6ad LP |
430 | if (w & INHIBIT_HANDLE_SUSPEND_KEY) |
431 | p = stpcpy(p, "handle-suspend-key:"); | |
432 | if (w & INHIBIT_HANDLE_HIBERNATE_KEY) | |
433 | p = stpcpy(p, "handle-hibernate-key:"); | |
beaafb2e LP |
434 | if (w & INHIBIT_HANDLE_LID_SWITCH) |
435 | p = stpcpy(p, "handle-lid-switch:"); | |
436 | ||
437 | if (p > buffer) | |
438 | *(p-1) = 0; | |
439 | else | |
440 | *p = 0; | |
441 | ||
442 | return buffer; | |
f8e2fb7b LP |
443 | } |
444 | ||
445 | InhibitWhat inhibit_what_from_string(const char *s) { | |
446 | InhibitWhat what = 0; | |
a2a5291b | 447 | const char *word, *state; |
f8e2fb7b LP |
448 | size_t l; |
449 | ||
a2a5291b ZJS |
450 | FOREACH_WORD_SEPARATOR(word, l, s, ":", state) { |
451 | if (l == 8 && strneq(word, "shutdown", l)) | |
f8e2fb7b | 452 | what |= INHIBIT_SHUTDOWN; |
a2a5291b | 453 | else if (l == 5 && strneq(word, "sleep", l)) |
4943c1c9 | 454 | what |= INHIBIT_SLEEP; |
a2a5291b | 455 | else if (l == 4 && strneq(word, "idle", l)) |
f8e2fb7b | 456 | what |= INHIBIT_IDLE; |
a2a5291b | 457 | else if (l == 16 && strneq(word, "handle-power-key", l)) |
beaafb2e | 458 | what |= INHIBIT_HANDLE_POWER_KEY; |
a2a5291b | 459 | else if (l == 18 && strneq(word, "handle-suspend-key", l)) |
8e7fd6ad | 460 | what |= INHIBIT_HANDLE_SUSPEND_KEY; |
a2a5291b | 461 | else if (l == 20 && strneq(word, "handle-hibernate-key", l)) |
8e7fd6ad | 462 | what |= INHIBIT_HANDLE_HIBERNATE_KEY; |
a2a5291b | 463 | else if (l == 17 && strneq(word, "handle-lid-switch", l)) |
beaafb2e | 464 | what |= INHIBIT_HANDLE_LID_SWITCH; |
f8e2fb7b LP |
465 | else |
466 | return _INHIBIT_WHAT_INVALID; | |
467 | } | |
468 | ||
469 | return what; | |
f8e2fb7b | 470 | } |
eecd1362 LP |
471 | |
472 | static const char* const inhibit_mode_table[_INHIBIT_MODE_MAX] = { | |
473 | [INHIBIT_BLOCK] = "block", | |
474 | [INHIBIT_DELAY] = "delay" | |
475 | }; | |
476 | ||
477 | DEFINE_STRING_TABLE_LOOKUP(inhibit_mode, InhibitMode); |