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20263082 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
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 | |
20263082 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
20263082 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
20263082 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <assert.h> | |
23 | #include <errno.h> | |
24 | #include <unistd.h> | |
25 | #include <fcntl.h> | |
26 | #include <sys/ioctl.h> | |
27 | #include <linux/vt.h> | |
5eda94dd | 28 | #include <string.h> |
20263082 | 29 | |
cc377381 LP |
30 | #include "sd-id128.h" |
31 | #include "sd-messages.h" | |
90821c93 | 32 | #include "logind-seat.h" |
5eda94dd | 33 | #include "logind-acl.h" |
20263082 | 34 | #include "util.h" |
49e942b2 | 35 | #include "mkdir.h" |
9eb977db | 36 | #include "path-util.h" |
20263082 LP |
37 | |
38 | Seat *seat_new(Manager *m, const char *id) { | |
39 | Seat *s; | |
40 | ||
41 | assert(m); | |
42 | assert(id); | |
43 | ||
44 | s = new0(Seat, 1); | |
45 | if (!s) | |
46 | return NULL; | |
47 | ||
98a28fef | 48 | s->state_file = strappend("/run/systemd/seats/", id); |
20263082 LP |
49 | if (!s->state_file) { |
50 | free(s); | |
51 | return NULL; | |
52 | } | |
53 | ||
2b6bf07d | 54 | s->id = basename(s->state_file); |
14c3baca | 55 | s->manager = m; |
20263082 LP |
56 | |
57 | if (hashmap_put(m->seats, s->id, s) < 0) { | |
14c3baca | 58 | free(s->state_file); |
20263082 LP |
59 | free(s); |
60 | return NULL; | |
61 | } | |
62 | ||
20263082 LP |
63 | return s; |
64 | } | |
65 | ||
66 | void seat_free(Seat *s) { | |
67 | assert(s); | |
68 | ||
14c3baca | 69 | if (s->in_gc_queue) |
71fda00f | 70 | LIST_REMOVE(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca | 71 | |
20263082 LP |
72 | while (s->sessions) |
73 | session_free(s->sessions); | |
74 | ||
75 | assert(!s->active); | |
76 | ||
77 | while (s->devices) | |
78 | device_free(s->devices); | |
79 | ||
80 | hashmap_remove(s->manager->seats, s->id); | |
81 | ||
49e6fdbf | 82 | free(s->positions); |
d2f92cdf | 83 | free(s->state_file); |
20263082 LP |
84 | free(s); |
85 | } | |
86 | ||
87 | int seat_save(Seat *s) { | |
cc377381 LP |
88 | _cleanup_free_ char *temp_path = NULL; |
89 | _cleanup_fclose_ FILE *f = NULL; | |
20263082 LP |
90 | int r; |
91 | ||
92 | assert(s); | |
93 | ||
accaeded LP |
94 | if (!s->started) |
95 | return 0; | |
96 | ||
d2e54fae | 97 | r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0); |
20263082 | 98 | if (r < 0) |
14c3baca LP |
99 | goto finish; |
100 | ||
101 | r = fopen_temporary(s->state_file, &f, &temp_path); | |
102 | if (r < 0) | |
103 | goto finish; | |
20263082 | 104 | |
14c3baca | 105 | fchmod(fileno(f), 0644); |
20263082 LP |
106 | |
107 | fprintf(f, | |
14c3baca | 108 | "# This is private data. Do not parse.\n" |
92432fcc | 109 | "IS_SEAT0=%i\n" |
f1a8e221 LP |
110 | "CAN_MULTI_SESSION=%i\n" |
111 | "CAN_TTY=%i\n" | |
112 | "CAN_GRAPHICAL=%i\n", | |
92432fcc | 113 | seat_is_seat0(s), |
f1a8e221 LP |
114 | seat_can_multi_session(s), |
115 | seat_can_tty(s), | |
116 | seat_can_graphical(s)); | |
20263082 LP |
117 | |
118 | if (s->active) { | |
119 | assert(s->active->user); | |
120 | ||
121 | fprintf(f, | |
122 | "ACTIVE=%s\n" | |
a08ac7e0 | 123 | "ACTIVE_UID="UID_FMT"\n", |
20263082 | 124 | s->active->id, |
a08ac7e0 | 125 | s->active->user->uid); |
20263082 LP |
126 | } |
127 | ||
128 | if (s->sessions) { | |
129 | Session *i; | |
20263082 | 130 | |
fde78a3a | 131 | fputs("SESSIONS=", f); |
20263082 | 132 | LIST_FOREACH(sessions_by_seat, i, s->sessions) { |
14c3baca LP |
133 | fprintf(f, |
134 | "%s%c", | |
135 | i->id, | |
136 | i->sessions_by_seat_next ? ' ' : '\n'); | |
137 | } | |
20263082 | 138 | |
fde78a3a LP |
139 | fputs("UIDS=", f); |
140 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
20263082 | 141 | fprintf(f, |
90b2de37 ZJS |
142 | UID_FMT"%c", |
143 | i->user->uid, | |
14c3baca | 144 | i->sessions_by_seat_next ? ' ' : '\n'); |
20263082 LP |
145 | } |
146 | ||
147 | fflush(f); | |
14c3baca LP |
148 | |
149 | if (ferror(f) || rename(temp_path, s->state_file) < 0) { | |
20263082 LP |
150 | r = -errno; |
151 | unlink(s->state_file); | |
14c3baca | 152 | unlink(temp_path); |
20263082 LP |
153 | } |
154 | ||
14c3baca LP |
155 | finish: |
156 | if (r < 0) | |
90b2de37 | 157 | log_error("Failed to save seat data %s: %s", s->state_file, strerror(-r)); |
14c3baca | 158 | |
20263082 LP |
159 | return r; |
160 | } | |
161 | ||
162 | int seat_load(Seat *s) { | |
163 | assert(s); | |
164 | ||
a185c5aa LP |
165 | /* There isn't actually anything to read here ... */ |
166 | ||
20263082 LP |
167 | return 0; |
168 | } | |
169 | ||
92bd5ff3 | 170 | static int vt_allocate(unsigned int vtnr) { |
61376f96 | 171 | char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned int)]; |
cc377381 | 172 | _cleanup_close_ int fd = -1; |
20263082 LP |
173 | |
174 | assert(vtnr >= 1); | |
175 | ||
61376f96 | 176 | snprintf(p, sizeof(p), "/dev/tty%u", vtnr); |
20263082 | 177 | fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC); |
cc377381 LP |
178 | if (fd < 0) |
179 | return -errno; | |
20263082 | 180 | |
cc377381 | 181 | return 0; |
20263082 LP |
182 | } |
183 | ||
30ed21ce | 184 | int seat_preallocate_vts(Seat *s) { |
3f49d45a LP |
185 | int r = 0; |
186 | unsigned i; | |
20263082 LP |
187 | |
188 | assert(s); | |
189 | assert(s->manager); | |
190 | ||
30ed21ce LP |
191 | log_debug("Preallocating VTs..."); |
192 | ||
20263082 LP |
193 | if (s->manager->n_autovts <= 0) |
194 | return 0; | |
195 | ||
bf7825ae | 196 | if (!seat_has_vts(s)) |
20263082 LP |
197 | return 0; |
198 | ||
e7886786 | 199 | for (i = 1; i <= s->manager->n_autovts; i++) { |
20263082 LP |
200 | int q; |
201 | ||
202 | q = vt_allocate(i); | |
14c3baca LP |
203 | if (q < 0) { |
204 | log_error("Failed to preallocate VT %i: %s", i, strerror(-q)); | |
20263082 | 205 | r = q; |
14c3baca | 206 | } |
20263082 LP |
207 | } |
208 | ||
209 | return r; | |
210 | } | |
211 | ||
5eda94dd LP |
212 | int seat_apply_acls(Seat *s, Session *old_active) { |
213 | int r; | |
20263082 | 214 | |
5eda94dd | 215 | assert(s); |
20263082 | 216 | |
5eda94dd LP |
217 | r = devnode_acl_all(s->manager->udev, |
218 | s->id, | |
219 | false, | |
220 | !!old_active, old_active ? old_active->user->uid : 0, | |
221 | !!s->active, s->active ? s->active->user->uid : 0); | |
20263082 | 222 | |
5eda94dd LP |
223 | if (r < 0) |
224 | log_error("Failed to apply ACLs: %s", strerror(-r)); | |
20263082 LP |
225 | |
226 | return r; | |
227 | } | |
228 | ||
9418f147 LP |
229 | int seat_set_active(Seat *s, Session *session) { |
230 | Session *old_active; | |
231 | ||
232 | assert(s); | |
77527da0 | 233 | assert(!session || session->seat == s); |
9418f147 LP |
234 | |
235 | if (session == s->active) | |
236 | return 0; | |
237 | ||
238 | old_active = s->active; | |
239 | s->active = session; | |
240 | ||
dfd55270 | 241 | if (old_active) { |
118ecf32 | 242 | session_device_pause_all(old_active); |
cc377381 | 243 | session_send_changed(old_active, "Active", NULL); |
dfd55270 | 244 | } |
118ecf32 | 245 | |
9418f147 LP |
246 | seat_apply_acls(s, old_active); |
247 | ||
118ecf32 | 248 | if (session && session->started) { |
cc377381 | 249 | session_send_changed(session, "Active", NULL); |
118ecf32 DH |
250 | session_device_resume_all(session); |
251 | } | |
9418f147 LP |
252 | |
253 | if (!session || session->started) | |
cc377381 | 254 | seat_send_changed(s, "ActiveSession", NULL); |
9418f147 | 255 | |
98a28fef LP |
256 | seat_save(s); |
257 | ||
7f7bb946 | 258 | if (session) { |
98a28fef | 259 | session_save(session); |
7f7bb946 LP |
260 | user_save(session->user); |
261 | } | |
98a28fef | 262 | |
7f7bb946 | 263 | if (old_active) { |
98a28fef | 264 | session_save(old_active); |
78ab361c CG |
265 | if (!session || session->user != old_active->user) |
266 | user_save(old_active->user); | |
7f7bb946 | 267 | } |
98a28fef | 268 | |
9418f147 LP |
269 | return 0; |
270 | } | |
271 | ||
49e6fdbf DH |
272 | int seat_switch_to(Seat *s, unsigned int num) { |
273 | /* Public session positions skip 0 (there is only F1-F12). Maybe it | |
274 | * will get reassigned in the future, so return error for now. */ | |
275 | if (!num) | |
276 | return -EINVAL; | |
277 | ||
278 | if (num >= s->position_count || !s->positions[num]) | |
279 | return -EINVAL; | |
280 | ||
281 | return session_activate(s->positions[num]); | |
282 | } | |
283 | ||
284 | int seat_switch_to_next(Seat *s) { | |
285 | unsigned int start, i; | |
286 | ||
287 | if (!s->position_count) | |
288 | return -EINVAL; | |
289 | ||
290 | start = 1; | |
291 | if (s->active && s->active->pos > 0) | |
292 | start = s->active->pos; | |
293 | ||
294 | for (i = start + 1; i < s->position_count; ++i) | |
295 | if (s->positions[i]) | |
296 | return session_activate(s->positions[i]); | |
297 | ||
298 | for (i = 1; i < start; ++i) | |
299 | if (s->positions[i]) | |
300 | return session_activate(s->positions[i]); | |
301 | ||
302 | return -EINVAL; | |
303 | } | |
304 | ||
305 | int seat_switch_to_previous(Seat *s) { | |
306 | unsigned int start, i; | |
307 | ||
308 | if (!s->position_count) | |
309 | return -EINVAL; | |
310 | ||
311 | start = 1; | |
312 | if (s->active && s->active->pos > 0) | |
313 | start = s->active->pos; | |
314 | ||
315 | for (i = start - 1; i > 0; --i) | |
316 | if (s->positions[i]) | |
317 | return session_activate(s->positions[i]); | |
318 | ||
319 | for (i = s->position_count - 1; i > start; --i) | |
320 | if (s->positions[i]) | |
321 | return session_activate(s->positions[i]); | |
322 | ||
323 | return -EINVAL; | |
324 | } | |
325 | ||
92bd5ff3 | 326 | int seat_active_vt_changed(Seat *s, unsigned int vtnr) { |
9418f147 LP |
327 | Session *i, *new_active = NULL; |
328 | int r; | |
20263082 LP |
329 | |
330 | assert(s); | |
331 | assert(vtnr >= 1); | |
20263082 | 332 | |
bf7825ae | 333 | if (!seat_has_vts(s)) |
14c3baca LP |
334 | return -EINVAL; |
335 | ||
92bd5ff3 | 336 | log_debug("VT changed to %u", vtnr); |
20263082 LP |
337 | |
338 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
339 | if (i->vtnr == vtnr) { | |
14c3baca | 340 | new_active = i; |
20263082 LP |
341 | break; |
342 | } | |
343 | ||
9418f147 | 344 | r = seat_set_active(s, new_active); |
5eda94dd | 345 | manager_spawn_autovt(s->manager, vtnr); |
20263082 | 346 | |
9418f147 | 347 | return r; |
20263082 LP |
348 | } |
349 | ||
14c3baca LP |
350 | int seat_read_active_vt(Seat *s) { |
351 | char t[64]; | |
352 | ssize_t k; | |
92bd5ff3 DH |
353 | unsigned int vtnr; |
354 | int r; | |
14c3baca LP |
355 | |
356 | assert(s); | |
357 | ||
bf7825ae | 358 | if (!seat_has_vts(s)) |
14c3baca LP |
359 | return 0; |
360 | ||
361 | lseek(s->manager->console_active_fd, SEEK_SET, 0); | |
362 | ||
363 | k = read(s->manager->console_active_fd, t, sizeof(t)-1); | |
364 | if (k <= 0) { | |
365 | log_error("Failed to read current console: %s", k < 0 ? strerror(-errno) : "EOF"); | |
366 | return k < 0 ? -errno : -EIO; | |
367 | } | |
368 | ||
369 | t[k] = 0; | |
370 | truncate_nl(t); | |
371 | ||
372 | if (!startswith(t, "tty")) { | |
373 | log_error("Hm, /sys/class/tty/tty0/active is badly formatted."); | |
374 | return -EIO; | |
375 | } | |
376 | ||
92bd5ff3 | 377 | r = safe_atou(t+3, &vtnr); |
14c3baca LP |
378 | if (r < 0) { |
379 | log_error("Failed to parse VT number %s", t+3); | |
380 | return r; | |
381 | } | |
382 | ||
92bd5ff3 | 383 | if (!vtnr) { |
14c3baca LP |
384 | log_error("VT number invalid: %s", t+3); |
385 | return -EIO; | |
386 | } | |
387 | ||
388 | return seat_active_vt_changed(s, vtnr); | |
389 | } | |
390 | ||
391 | int seat_start(Seat *s) { | |
392 | assert(s); | |
393 | ||
3f49d45a LP |
394 | if (s->started) |
395 | return 0; | |
396 | ||
877d54e9 | 397 | log_struct(LOG_INFO, |
1ca6783f | 398 | MESSAGE_ID(SD_MESSAGE_SEAT_START), |
877d54e9 LP |
399 | "SEAT_ID=%s", s->id, |
400 | "MESSAGE=New seat %s.", s->id, | |
401 | NULL); | |
3f49d45a | 402 | |
14c3baca LP |
403 | /* Initialize VT magic stuff */ |
404 | seat_preallocate_vts(s); | |
405 | ||
406 | /* Read current VT */ | |
407 | seat_read_active_vt(s); | |
408 | ||
7f7bb946 LP |
409 | s->started = true; |
410 | ||
14c3baca LP |
411 | /* Save seat data */ |
412 | seat_save(s); | |
413 | ||
da119395 LP |
414 | seat_send_signal(s, true); |
415 | ||
14c3baca LP |
416 | return 0; |
417 | } | |
418 | ||
9bb69af4 | 419 | int seat_stop(Seat *s, bool force) { |
a185c5aa | 420 | int r = 0; |
20263082 LP |
421 | |
422 | assert(s); | |
423 | ||
ed18b08b | 424 | if (s->started) |
877d54e9 | 425 | log_struct(LOG_INFO, |
1ca6783f | 426 | MESSAGE_ID(SD_MESSAGE_SEAT_STOP), |
877d54e9 LP |
427 | "SEAT_ID=%s", s->id, |
428 | "MESSAGE=Removed seat %s.", s->id, | |
429 | NULL); | |
da119395 | 430 | |
9bb69af4 | 431 | seat_stop_sessions(s, force); |
a185c5aa LP |
432 | |
433 | unlink(s->state_file); | |
434 | seat_add_to_gc_queue(s); | |
435 | ||
ed18b08b LP |
436 | if (s->started) |
437 | seat_send_signal(s, false); | |
438 | ||
a185c5aa LP |
439 | s->started = false; |
440 | ||
441 | return r; | |
442 | } | |
443 | ||
9bb69af4 | 444 | int seat_stop_sessions(Seat *s, bool force) { |
a185c5aa LP |
445 | Session *session; |
446 | int r = 0, k; | |
447 | ||
448 | assert(s); | |
449 | ||
20263082 | 450 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { |
9bb69af4 | 451 | k = session_stop(session, force); |
20263082 LP |
452 | if (k < 0) |
453 | r = k; | |
454 | } | |
455 | ||
a185c5aa LP |
456 | return r; |
457 | } | |
14c3baca | 458 | |
49e6fdbf | 459 | void seat_evict_position(Seat *s, Session *session) { |
3e6b205f | 460 | Session *iter; |
49e6fdbf DH |
461 | unsigned int pos = session->pos; |
462 | ||
463 | session->pos = 0; | |
464 | ||
465 | if (!pos) | |
466 | return; | |
467 | ||
3e6b205f | 468 | if (pos < s->position_count && s->positions[pos] == session) { |
49e6fdbf | 469 | s->positions[pos] = NULL; |
3e6b205f DH |
470 | |
471 | /* There might be another session claiming the same | |
472 | * position (eg., during gdm->session transition), so lets look | |
473 | * for it and set it on the free slot. */ | |
474 | LIST_FOREACH(sessions_by_seat, iter, s->sessions) { | |
475 | if (iter->pos == pos) { | |
476 | s->positions[pos] = iter; | |
477 | break; | |
478 | } | |
479 | } | |
480 | } | |
49e6fdbf DH |
481 | } |
482 | ||
483 | void seat_claim_position(Seat *s, Session *session, unsigned int pos) { | |
484 | /* with VTs, the position is always the same as the VTnr */ | |
485 | if (seat_has_vts(s)) | |
486 | pos = session->vtnr; | |
487 | ||
a1937e67 | 488 | if (!GREEDY_REALLOC0_T(s->positions, s->position_count, pos + 1)) |
49e6fdbf DH |
489 | return; |
490 | ||
491 | seat_evict_position(s, session); | |
492 | ||
493 | session->pos = pos; | |
494 | if (pos > 0 && !s->positions[pos]) | |
495 | s->positions[pos] = session; | |
496 | } | |
497 | ||
498 | static void seat_assign_position(Seat *s, Session *session) { | |
499 | unsigned int pos; | |
500 | ||
501 | if (session->pos > 0) | |
502 | return; | |
503 | ||
504 | for (pos = 1; pos < s->position_count; ++pos) | |
505 | if (!s->positions[pos]) | |
506 | break; | |
507 | ||
508 | seat_claim_position(s, session, pos); | |
509 | } | |
510 | ||
a185c5aa LP |
511 | int seat_attach_session(Seat *s, Session *session) { |
512 | assert(s); | |
513 | assert(session); | |
514 | assert(!session->seat); | |
3f49d45a | 515 | |
c506027a DH |
516 | if (!seat_has_vts(s) != !session->vtnr) |
517 | return -EINVAL; | |
518 | ||
a185c5aa | 519 | session->seat = s; |
71fda00f | 520 | LIST_PREPEND(sessions_by_seat, s->sessions, session); |
49e6fdbf | 521 | seat_assign_position(s, session); |
a185c5aa | 522 | |
cc377381 | 523 | seat_send_changed(s, "Sessions", NULL); |
9418f147 | 524 | |
bf7825ae | 525 | /* On seats with VTs, the VT logic defines which session is active. On |
3fdb2494 DH |
526 | * seats without VTs, we automatically activate new sessions. */ |
527 | if (!seat_has_vts(s)) | |
9418f147 | 528 | seat_set_active(s, session); |
9418f147 | 529 | |
a185c5aa LP |
530 | return 0; |
531 | } | |
532 | ||
d7bd01b5 DH |
533 | void seat_complete_switch(Seat *s) { |
534 | Session *session; | |
535 | ||
536 | assert(s); | |
537 | ||
538 | /* if no session-switch is pending or if it got canceled, do nothing */ | |
539 | if (!s->pending_switch) | |
540 | return; | |
541 | ||
542 | session = s->pending_switch; | |
543 | s->pending_switch = NULL; | |
544 | ||
545 | seat_set_active(s, session); | |
546 | } | |
547 | ||
bf7825ae DH |
548 | bool seat_has_vts(Seat *s) { |
549 | assert(s); | |
550 | ||
551 | return seat_is_seat0(s) && s->manager->console_active_fd >= 0; | |
552 | } | |
553 | ||
92432fcc | 554 | bool seat_is_seat0(Seat *s) { |
a185c5aa LP |
555 | assert(s); |
556 | ||
92432fcc | 557 | return s->manager->seat0 == s; |
a185c5aa LP |
558 | } |
559 | ||
addedec4 LP |
560 | bool seat_can_multi_session(Seat *s) { |
561 | assert(s); | |
562 | ||
bf7825ae | 563 | return seat_has_vts(s); |
addedec4 LP |
564 | } |
565 | ||
f1a8e221 LP |
566 | bool seat_can_tty(Seat *s) { |
567 | assert(s); | |
568 | ||
bf7825ae | 569 | return seat_has_vts(s); |
f1a8e221 LP |
570 | } |
571 | ||
718d006a DH |
572 | bool seat_has_master_device(Seat *s) { |
573 | assert(s); | |
574 | ||
575 | /* device list is ordered by "master" flag */ | |
576 | return !!s->devices && s->devices->master; | |
577 | } | |
578 | ||
f1a8e221 LP |
579 | bool seat_can_graphical(Seat *s) { |
580 | assert(s); | |
581 | ||
718d006a | 582 | return seat_has_master_device(s); |
f1a8e221 LP |
583 | } |
584 | ||
a185c5aa LP |
585 | int seat_get_idle_hint(Seat *s, dual_timestamp *t) { |
586 | Session *session; | |
587 | bool idle_hint = true; | |
588 | dual_timestamp ts = { 0, 0 }; | |
589 | ||
590 | assert(s); | |
591 | ||
592 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { | |
593 | dual_timestamp k; | |
594 | int ih; | |
595 | ||
596 | ih = session_get_idle_hint(session, &k); | |
597 | if (ih < 0) | |
598 | return ih; | |
599 | ||
600 | if (!ih) { | |
601 | if (!idle_hint) { | |
4a271908 | 602 | if (k.monotonic > ts.monotonic) |
a185c5aa LP |
603 | ts = k; |
604 | } else { | |
605 | idle_hint = false; | |
606 | ts = k; | |
607 | } | |
608 | } else if (idle_hint) { | |
609 | ||
610 | if (k.monotonic > ts.monotonic) | |
611 | ts = k; | |
612 | } | |
613 | } | |
614 | ||
615 | if (t) | |
616 | *t = ts; | |
617 | ||
618 | return idle_hint; | |
20263082 | 619 | } |
14c3baca | 620 | |
cc377381 | 621 | bool seat_check_gc(Seat *s, bool drop_not_started) { |
14c3baca LP |
622 | assert(s); |
623 | ||
4a4b033f | 624 | if (drop_not_started && !s->started) |
cc377381 | 625 | return false; |
932e3ee7 | 626 | |
92432fcc | 627 | if (seat_is_seat0(s)) |
cc377381 | 628 | return true; |
14c3baca | 629 | |
718d006a | 630 | return seat_has_master_device(s); |
14c3baca LP |
631 | } |
632 | ||
633 | void seat_add_to_gc_queue(Seat *s) { | |
634 | assert(s); | |
635 | ||
636 | if (s->in_gc_queue) | |
637 | return; | |
638 | ||
71fda00f | 639 | LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca LP |
640 | s->in_gc_queue = true; |
641 | } | |
3f49d45a LP |
642 | |
643 | static bool seat_name_valid_char(char c) { | |
644 | return | |
645 | (c >= 'a' && c <= 'z') || | |
646 | (c >= 'A' && c <= 'Z') || | |
647 | (c >= '0' && c <= '9') || | |
648 | c == '-' || | |
649 | c == '_'; | |
650 | } | |
651 | ||
652 | bool seat_name_is_valid(const char *name) { | |
653 | const char *p; | |
654 | ||
655 | assert(name); | |
656 | ||
657 | if (!startswith(name, "seat")) | |
658 | return false; | |
659 | ||
660 | if (!name[4]) | |
661 | return false; | |
662 | ||
663 | for (p = name; *p; p++) | |
664 | if (!seat_name_valid_char(*p)) | |
665 | return false; | |
666 | ||
1c9a2c10 LP |
667 | if (strlen(name) > 255) |
668 | return false; | |
669 | ||
3f49d45a LP |
670 | return true; |
671 | } |