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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
f8e2fb7b LP |
2 | |
3 | #include <errno.h> | |
4 | #include <fcntl.h> | |
f8e2fb7b | 5 | #include <string.h> |
f8e2fb7b LP |
6 | #include <unistd.h> |
7 | ||
b5efdb8a | 8 | #include "alloc-util.h" |
4f5dd394 | 9 | #include "escape.h" |
3ffd4af2 | 10 | #include "fd-util.h" |
a5c32cff | 11 | #include "fileio.h" |
f97b34a6 | 12 | #include "format-util.h" |
3ffd4af2 | 13 | #include "logind-inhibit.h" |
4f5dd394 | 14 | #include "mkdir.h" |
6bedfcbb | 15 | #include "parse-util.h" |
8b43440b | 16 | #include "string-table.h" |
07630cea | 17 | #include "string-util.h" |
b1d4f8e1 | 18 | #include "user-util.h" |
4f5dd394 | 19 | #include "util.h" |
f8e2fb7b LP |
20 | |
21 | Inhibitor* inhibitor_new(Manager *m, const char* id) { | |
22 | Inhibitor *i; | |
23 | ||
24 | assert(m); | |
25 | ||
26 | i = new0(Inhibitor, 1); | |
27 | if (!i) | |
28 | return NULL; | |
29 | ||
30 | i->state_file = strappend("/run/systemd/inhibit/", id); | |
6b430fdb ZJS |
31 | if (!i->state_file) |
32 | return mfree(i); | |
f8e2fb7b | 33 | |
2b6bf07d | 34 | i->id = basename(i->state_file); |
f8e2fb7b LP |
35 | |
36 | if (hashmap_put(m->inhibitors, i->id, i) < 0) { | |
37 | free(i->state_file); | |
6b430fdb | 38 | return mfree(i); |
f8e2fb7b LP |
39 | } |
40 | ||
41 | i->manager = m; | |
42 | i->fifo_fd = -1; | |
43 | ||
44 | return i; | |
45 | } | |
46 | ||
47 | void inhibitor_free(Inhibitor *i) { | |
48 | assert(i); | |
49 | ||
f8e2fb7b | 50 | hashmap_remove(i->manager->inhibitors, i->id); |
cc377381 | 51 | |
f8e2fb7b LP |
52 | inhibitor_remove_fifo(i); |
53 | ||
cc377381 LP |
54 | free(i->who); |
55 | free(i->why); | |
56 | ||
f8e2fb7b LP |
57 | if (i->state_file) { |
58 | unlink(i->state_file); | |
59 | free(i->state_file); | |
60 | } | |
61 | ||
62 | free(i); | |
63 | } | |
64 | ||
65 | int inhibitor_save(Inhibitor *i) { | |
cc377381 LP |
66 | _cleanup_free_ char *temp_path = NULL; |
67 | _cleanup_fclose_ FILE *f = NULL; | |
f8e2fb7b | 68 | int r; |
f8e2fb7b LP |
69 | |
70 | assert(i); | |
71 | ||
37c1d5e9 | 72 | r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0, MKDIR_WARN_MODE); |
f8e2fb7b | 73 | if (r < 0) |
dacd6cee | 74 | goto fail; |
f8e2fb7b LP |
75 | |
76 | r = fopen_temporary(i->state_file, &f, &temp_path); | |
77 | if (r < 0) | |
dacd6cee | 78 | goto fail; |
f8e2fb7b LP |
79 | |
80 | fchmod(fileno(f), 0644); | |
81 | ||
82 | fprintf(f, | |
83 | "# This is private data. Do not parse.\n" | |
84 | "WHAT=%s\n" | |
eecd1362 | 85 | "MODE=%s\n" |
90b2de37 ZJS |
86 | "UID="UID_FMT"\n" |
87 | "PID="PID_FMT"\n", | |
f8e2fb7b | 88 | inhibit_what_to_string(i->what), |
eecd1362 | 89 | inhibit_mode_to_string(i->mode), |
90b2de37 ZJS |
90 | i->uid, |
91 | i->pid); | |
f8e2fb7b LP |
92 | |
93 | if (i->who) { | |
cc377381 LP |
94 | _cleanup_free_ char *cc = NULL; |
95 | ||
f8e2fb7b | 96 | cc = cescape(i->who); |
88231eb6 | 97 | if (!cc) { |
f8e2fb7b | 98 | r = -ENOMEM; |
88231eb6 TA |
99 | goto fail; |
100 | } | |
101 | ||
102 | fprintf(f, "WHO=%s\n", cc); | |
f8e2fb7b LP |
103 | } |
104 | ||
105 | if (i->why) { | |
cc377381 LP |
106 | _cleanup_free_ char *cc = NULL; |
107 | ||
f8e2fb7b | 108 | cc = cescape(i->why); |
88231eb6 | 109 | if (!cc) { |
f8e2fb7b | 110 | r = -ENOMEM; |
88231eb6 TA |
111 | goto fail; |
112 | } | |
113 | ||
114 | fprintf(f, "WHY=%s\n", cc); | |
f8e2fb7b LP |
115 | } |
116 | ||
117 | if (i->fifo_path) | |
118 | fprintf(f, "FIFO=%s\n", i->fifo_path); | |
119 | ||
dacd6cee LP |
120 | r = fflush_and_check(f); |
121 | if (r < 0) | |
122 | goto fail; | |
f8e2fb7b | 123 | |
dacd6cee | 124 | if (rename(temp_path, i->state_file) < 0) { |
f8e2fb7b | 125 | r = -errno; |
dacd6cee | 126 | goto fail; |
f8e2fb7b LP |
127 | } |
128 | ||
dacd6cee LP |
129 | return 0; |
130 | ||
131 | fail: | |
132 | (void) unlink(i->state_file); | |
133 | ||
134 | if (temp_path) | |
135 | (void) unlink(temp_path); | |
f8e2fb7b | 136 | |
dacd6cee | 137 | return log_error_errno(r, "Failed to save inhibit data %s: %m", i->state_file); |
f8e2fb7b LP |
138 | } |
139 | ||
140 | int inhibitor_start(Inhibitor *i) { | |
141 | assert(i); | |
142 | ||
143 | if (i->started) | |
144 | return 0; | |
145 | ||
c7b5eb98 LP |
146 | dual_timestamp_get(&i->since); |
147 | ||
de0671ee | 148 | log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s started.", |
f8e2fb7b | 149 | strna(i->who), strna(i->why), |
de0671ee | 150 | i->pid, i->uid, |
eecd1362 | 151 | inhibit_mode_to_string(i->mode)); |
f8e2fb7b LP |
152 | |
153 | inhibitor_save(i); | |
154 | ||
155 | i->started = true; | |
156 | ||
cc377381 | 157 | manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL); |
f8e2fb7b LP |
158 | |
159 | return 0; | |
160 | } | |
161 | ||
162 | int inhibitor_stop(Inhibitor *i) { | |
163 | assert(i); | |
164 | ||
165 | if (i->started) | |
de0671ee | 166 | log_debug("Inhibitor %s (%s) pid="PID_FMT" uid="UID_FMT" mode=%s stopped.", |
f8e2fb7b | 167 | strna(i->who), strna(i->why), |
de0671ee | 168 | i->pid, i->uid, |
eecd1362 | 169 | inhibit_mode_to_string(i->mode)); |
f8e2fb7b LP |
170 | |
171 | if (i->state_file) | |
172 | unlink(i->state_file); | |
173 | ||
174 | i->started = false; | |
175 | ||
cc377381 | 176 | manager_send_changed(i->manager, i->mode == INHIBIT_BLOCK ? "BlockInhibited" : "DelayInhibited", NULL); |
f8e2fb7b LP |
177 | |
178 | return 0; | |
179 | } | |
180 | ||
181 | int inhibitor_load(Inhibitor *i) { | |
cc377381 LP |
182 | |
183 | _cleanup_free_ char | |
f8e2fb7b LP |
184 | *what = NULL, |
185 | *uid = NULL, | |
186 | *pid = NULL, | |
187 | *who = NULL, | |
eecd1362 LP |
188 | *why = NULL, |
189 | *mode = NULL; | |
f8e2fb7b | 190 | |
cc377381 LP |
191 | InhibitWhat w; |
192 | InhibitMode mm; | |
193 | char *cc; | |
194 | int r; | |
195 | ||
1a5a177e | 196 | r = parse_env_file(NULL, i->state_file, NEWLINE, |
f8e2fb7b LP |
197 | "WHAT", &what, |
198 | "UID", &uid, | |
199 | "PID", &pid, | |
200 | "WHO", &who, | |
201 | "WHY", &why, | |
eecd1362 | 202 | "MODE", &mode, |
f8e2fb7b LP |
203 | "FIFO", &i->fifo_path, |
204 | NULL); | |
205 | if (r < 0) | |
cc377381 | 206 | return r; |
f8e2fb7b | 207 | |
eecd1362 | 208 | w = what ? inhibit_what_from_string(what) : 0; |
f8e2fb7b LP |
209 | if (w >= 0) |
210 | i->what = w; | |
211 | ||
eecd1362 LP |
212 | mm = mode ? inhibit_mode_from_string(mode) : INHIBIT_BLOCK; |
213 | if (mm >= 0) | |
214 | i->mode = mm; | |
215 | ||
a34faf57 LN |
216 | if (uid) { |
217 | r = parse_uid(uid, &i->uid); | |
218 | if (r < 0) | |
cc377381 | 219 | return r; |
a34faf57 | 220 | } |
eecd1362 | 221 | |
a34faf57 LN |
222 | if (pid) { |
223 | r = parse_pid(pid, &i->pid); | |
224 | if (r < 0) | |
cc377381 | 225 | return r; |
a34faf57 | 226 | } |
f8e2fb7b LP |
227 | |
228 | if (who) { | |
527b7a42 LP |
229 | r = cunescape(who, 0, &cc); |
230 | if (r < 0) | |
231 | return r; | |
f8e2fb7b LP |
232 | |
233 | free(i->who); | |
234 | i->who = cc; | |
235 | } | |
236 | ||
237 | if (why) { | |
527b7a42 LP |
238 | r = cunescape(why, 0, &cc); |
239 | if (r < 0) | |
240 | return r; | |
f8e2fb7b LP |
241 | |
242 | free(i->why); | |
243 | i->why = cc; | |
244 | } | |
245 | ||
246 | if (i->fifo_path) { | |
247 | int fd; | |
248 | ||
249 | fd = inhibitor_create_fifo(i); | |
03e334a1 | 250 | safe_close(fd); |
f8e2fb7b LP |
251 | } |
252 | ||
cc377381 LP |
253 | return 0; |
254 | } | |
f8e2fb7b | 255 | |
cc377381 LP |
256 | static int inhibitor_dispatch_fifo(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
257 | Inhibitor *i = userdata; | |
258 | ||
259 | assert(s); | |
260 | assert(fd == i->fifo_fd); | |
261 | assert(i); | |
262 | ||
263 | inhibitor_stop(i); | |
264 | inhibitor_free(i); | |
265 | ||
266 | return 0; | |
f8e2fb7b LP |
267 | } |
268 | ||
269 | int inhibitor_create_fifo(Inhibitor *i) { | |
270 | int r; | |
271 | ||
272 | assert(i); | |
273 | ||
274 | /* Create FIFO */ | |
275 | if (!i->fifo_path) { | |
37c1d5e9 | 276 | r = mkdir_safe_label("/run/systemd/inhibit", 0755, 0, 0, MKDIR_WARN_MODE); |
f8e2fb7b LP |
277 | if (r < 0) |
278 | return r; | |
279 | ||
605405c6 | 280 | i->fifo_path = strjoin("/run/systemd/inhibit/", i->id, ".ref"); |
cc377381 | 281 | if (!i->fifo_path) |
f8e2fb7b LP |
282 | return -ENOMEM; |
283 | ||
284 | if (mkfifo(i->fifo_path, 0600) < 0 && errno != EEXIST) | |
285 | return -errno; | |
286 | } | |
287 | ||
288 | /* Open reading side */ | |
289 | if (i->fifo_fd < 0) { | |
db4a47e9 | 290 | i->fifo_fd = open(i->fifo_path, O_RDONLY|O_CLOEXEC|O_NONBLOCK); |
f8e2fb7b LP |
291 | if (i->fifo_fd < 0) |
292 | return -errno; | |
cc377381 | 293 | } |
f8e2fb7b | 294 | |
cc377381 | 295 | if (!i->event_source) { |
151b9b96 | 296 | r = sd_event_add_io(i->manager->event, &i->event_source, i->fifo_fd, 0, inhibitor_dispatch_fifo, i); |
f8e2fb7b LP |
297 | if (r < 0) |
298 | return r; | |
299 | ||
e11544a8 | 300 | r = sd_event_source_set_priority(i->event_source, SD_EVENT_PRIORITY_IDLE-10); |
cc377381 LP |
301 | if (r < 0) |
302 | return r; | |
f8e2fb7b LP |
303 | } |
304 | ||
305 | /* Open writing side */ | |
db4a47e9 | 306 | r = open(i->fifo_path, O_WRONLY|O_CLOEXEC|O_NONBLOCK); |
f8e2fb7b LP |
307 | if (r < 0) |
308 | return -errno; | |
309 | ||
310 | return r; | |
311 | } | |
312 | ||
313 | void inhibitor_remove_fifo(Inhibitor *i) { | |
314 | assert(i); | |
315 | ||
03e334a1 LP |
316 | i->event_source = sd_event_source_unref(i->event_source); |
317 | i->fifo_fd = safe_close(i->fifo_fd); | |
f8e2fb7b LP |
318 | |
319 | if (i->fifo_path) { | |
320 | unlink(i->fifo_path); | |
a1e58e8e | 321 | i->fifo_path = mfree(i->fifo_path); |
f8e2fb7b LP |
322 | } |
323 | } | |
324 | ||
eecd1362 | 325 | InhibitWhat manager_inhibit_what(Manager *m, InhibitMode mm) { |
f8e2fb7b LP |
326 | Inhibitor *i; |
327 | Iterator j; | |
328 | InhibitWhat what = 0; | |
329 | ||
330 | assert(m); | |
331 | ||
cc377381 | 332 | HASHMAP_FOREACH(i, m->inhibitors, j) |
5e8273ac | 333 | if (i->mode == mm && i->started) |
eecd1362 | 334 | what |= i->what; |
f8e2fb7b LP |
335 | |
336 | return what; | |
337 | } | |
338 | ||
beaafb2e LP |
339 | static int pid_is_active(Manager *m, pid_t pid) { |
340 | Session *s; | |
341 | int r; | |
342 | ||
7b33c622 AJ |
343 | /* Get client session. This is not what you are looking for these days. |
344 | * FIXME #6852 */ | |
beaafb2e | 345 | r = manager_get_session_by_pid(m, pid, &s); |
2c4f86c1 | 346 | if (r < 0) |
beaafb2e LP |
347 | return r; |
348 | ||
2c4f86c1 LP |
349 | /* If there's no session assigned to it, then it's globally |
350 | * active on all ttys */ | |
351 | if (r == 0) | |
352 | return 1; | |
353 | ||
beaafb2e LP |
354 | return session_is_active(s); |
355 | } | |
356 | ||
357 | bool manager_is_inhibited( | |
358 | Manager *m, | |
359 | InhibitWhat w, | |
360 | InhibitMode mm, | |
361 | dual_timestamp *since, | |
409133be LP |
362 | bool ignore_inactive, |
363 | bool ignore_uid, | |
85a428c6 LP |
364 | uid_t uid, |
365 | Inhibitor **offending) { | |
beaafb2e | 366 | |
c7b5eb98 LP |
367 | Inhibitor *i; |
368 | Iterator j; | |
5cb14b37 | 369 | struct dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
c7b5eb98 LP |
370 | bool inhibited = false; |
371 | ||
372 | assert(m); | |
373 | assert(w > 0 && w < _INHIBIT_WHAT_MAX); | |
374 | ||
cc377381 | 375 | HASHMAP_FOREACH(i, m->inhibitors, j) { |
5e8273ac AF |
376 | if (!i->started) |
377 | continue; | |
378 | ||
c7b5eb98 LP |
379 | if (!(i->what & w)) |
380 | continue; | |
381 | ||
eecd1362 LP |
382 | if (i->mode != mm) |
383 | continue; | |
384 | ||
409133be LP |
385 | if (ignore_inactive && pid_is_active(m, i->pid) <= 0) |
386 | continue; | |
387 | ||
388 | if (ignore_uid && i->uid == uid) | |
beaafb2e LP |
389 | continue; |
390 | ||
c7b5eb98 LP |
391 | if (!inhibited || |
392 | i->since.monotonic < ts.monotonic) | |
393 | ts = i->since; | |
394 | ||
395 | inhibited = true; | |
85a428c6 LP |
396 | |
397 | if (offending) | |
398 | *offending = i; | |
c7b5eb98 LP |
399 | } |
400 | ||
401 | if (since) | |
402 | *since = ts; | |
403 | ||
404 | return inhibited; | |
405 | } | |
406 | ||
f8e2fb7b | 407 | const char *inhibit_what_to_string(InhibitWhat w) { |
ec202eae | 408 | static thread_local char buffer[97]; |
beaafb2e | 409 | char *p; |
f8e2fb7b LP |
410 | |
411 | if (w < 0 || w >= _INHIBIT_WHAT_MAX) | |
412 | return NULL; | |
413 | ||
beaafb2e LP |
414 | p = buffer; |
415 | if (w & INHIBIT_SHUTDOWN) | |
416 | p = stpcpy(p, "shutdown:"); | |
417 | if (w & INHIBIT_SLEEP) | |
418 | p = stpcpy(p, "sleep:"); | |
419 | if (w & INHIBIT_IDLE) | |
420 | p = stpcpy(p, "idle:"); | |
421 | if (w & INHIBIT_HANDLE_POWER_KEY) | |
422 | p = stpcpy(p, "handle-power-key:"); | |
8e7fd6ad LP |
423 | if (w & INHIBIT_HANDLE_SUSPEND_KEY) |
424 | p = stpcpy(p, "handle-suspend-key:"); | |
425 | if (w & INHIBIT_HANDLE_HIBERNATE_KEY) | |
426 | p = stpcpy(p, "handle-hibernate-key:"); | |
beaafb2e LP |
427 | if (w & INHIBIT_HANDLE_LID_SWITCH) |
428 | p = stpcpy(p, "handle-lid-switch:"); | |
429 | ||
430 | if (p > buffer) | |
431 | *(p-1) = 0; | |
432 | else | |
433 | *p = 0; | |
434 | ||
435 | return buffer; | |
f8e2fb7b LP |
436 | } |
437 | ||
438 | InhibitWhat inhibit_what_from_string(const char *s) { | |
439 | InhibitWhat what = 0; | |
a2a5291b | 440 | const char *word, *state; |
f8e2fb7b LP |
441 | size_t l; |
442 | ||
a2a5291b ZJS |
443 | FOREACH_WORD_SEPARATOR(word, l, s, ":", state) { |
444 | if (l == 8 && strneq(word, "shutdown", l)) | |
f8e2fb7b | 445 | what |= INHIBIT_SHUTDOWN; |
a2a5291b | 446 | else if (l == 5 && strneq(word, "sleep", l)) |
4943c1c9 | 447 | what |= INHIBIT_SLEEP; |
a2a5291b | 448 | else if (l == 4 && strneq(word, "idle", l)) |
f8e2fb7b | 449 | what |= INHIBIT_IDLE; |
a2a5291b | 450 | else if (l == 16 && strneq(word, "handle-power-key", l)) |
beaafb2e | 451 | what |= INHIBIT_HANDLE_POWER_KEY; |
a2a5291b | 452 | else if (l == 18 && strneq(word, "handle-suspend-key", l)) |
8e7fd6ad | 453 | what |= INHIBIT_HANDLE_SUSPEND_KEY; |
a2a5291b | 454 | else if (l == 20 && strneq(word, "handle-hibernate-key", l)) |
8e7fd6ad | 455 | what |= INHIBIT_HANDLE_HIBERNATE_KEY; |
a2a5291b | 456 | else if (l == 17 && strneq(word, "handle-lid-switch", l)) |
beaafb2e | 457 | what |= INHIBIT_HANDLE_LID_SWITCH; |
f8e2fb7b LP |
458 | else |
459 | return _INHIBIT_WHAT_INVALID; | |
460 | } | |
461 | ||
462 | return what; | |
f8e2fb7b | 463 | } |
eecd1362 LP |
464 | |
465 | static const char* const inhibit_mode_table[_INHIBIT_MODE_MAX] = { | |
466 | [INHIBIT_BLOCK] = "block", | |
467 | [INHIBIT_DELAY] = "delay" | |
468 | }; | |
469 | ||
470 | DEFINE_STRING_TABLE_LOOKUP(inhibit_mode, InhibitMode); |