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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 | ||
20263082 LP |
22 | #include <errno.h> |
23 | #include <unistd.h> | |
24 | #include <fcntl.h> | |
5eda94dd | 25 | #include <string.h> |
20263082 | 26 | |
cc377381 | 27 | #include "sd-messages.h" |
90821c93 | 28 | #include "logind-seat.h" |
5eda94dd | 29 | #include "logind-acl.h" |
20263082 | 30 | #include "util.h" |
49e942b2 | 31 | #include "mkdir.h" |
6482f626 | 32 | #include "formats-util.h" |
288a74cc | 33 | #include "terminal-util.h" |
20263082 LP |
34 | |
35 | Seat *seat_new(Manager *m, const char *id) { | |
36 | Seat *s; | |
37 | ||
38 | assert(m); | |
39 | assert(id); | |
40 | ||
41 | s = new0(Seat, 1); | |
42 | if (!s) | |
43 | return NULL; | |
44 | ||
98a28fef | 45 | s->state_file = strappend("/run/systemd/seats/", id); |
20263082 LP |
46 | if (!s->state_file) { |
47 | free(s); | |
48 | return NULL; | |
49 | } | |
50 | ||
2b6bf07d | 51 | s->id = basename(s->state_file); |
14c3baca | 52 | s->manager = m; |
20263082 LP |
53 | |
54 | if (hashmap_put(m->seats, s->id, s) < 0) { | |
14c3baca | 55 | free(s->state_file); |
20263082 LP |
56 | free(s); |
57 | return NULL; | |
58 | } | |
59 | ||
20263082 LP |
60 | return s; |
61 | } | |
62 | ||
63 | void seat_free(Seat *s) { | |
64 | assert(s); | |
65 | ||
14c3baca | 66 | if (s->in_gc_queue) |
71fda00f | 67 | LIST_REMOVE(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca | 68 | |
20263082 LP |
69 | while (s->sessions) |
70 | session_free(s->sessions); | |
71 | ||
72 | assert(!s->active); | |
73 | ||
74 | while (s->devices) | |
75 | device_free(s->devices); | |
76 | ||
77 | hashmap_remove(s->manager->seats, s->id); | |
78 | ||
49e6fdbf | 79 | free(s->positions); |
d2f92cdf | 80 | free(s->state_file); |
20263082 LP |
81 | free(s); |
82 | } | |
83 | ||
84 | int seat_save(Seat *s) { | |
cc377381 LP |
85 | _cleanup_free_ char *temp_path = NULL; |
86 | _cleanup_fclose_ FILE *f = NULL; | |
20263082 LP |
87 | int r; |
88 | ||
89 | assert(s); | |
90 | ||
accaeded LP |
91 | if (!s->started) |
92 | return 0; | |
93 | ||
d2e54fae | 94 | r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0); |
20263082 | 95 | if (r < 0) |
14c3baca LP |
96 | goto finish; |
97 | ||
98 | r = fopen_temporary(s->state_file, &f, &temp_path); | |
99 | if (r < 0) | |
100 | goto finish; | |
20263082 | 101 | |
14c3baca | 102 | fchmod(fileno(f), 0644); |
20263082 LP |
103 | |
104 | fprintf(f, | |
14c3baca | 105 | "# This is private data. Do not parse.\n" |
92432fcc | 106 | "IS_SEAT0=%i\n" |
f1a8e221 LP |
107 | "CAN_MULTI_SESSION=%i\n" |
108 | "CAN_TTY=%i\n" | |
109 | "CAN_GRAPHICAL=%i\n", | |
92432fcc | 110 | seat_is_seat0(s), |
f1a8e221 LP |
111 | seat_can_multi_session(s), |
112 | seat_can_tty(s), | |
113 | seat_can_graphical(s)); | |
20263082 LP |
114 | |
115 | if (s->active) { | |
116 | assert(s->active->user); | |
117 | ||
118 | fprintf(f, | |
119 | "ACTIVE=%s\n" | |
a08ac7e0 | 120 | "ACTIVE_UID="UID_FMT"\n", |
20263082 | 121 | s->active->id, |
a08ac7e0 | 122 | s->active->user->uid); |
20263082 LP |
123 | } |
124 | ||
125 | if (s->sessions) { | |
126 | Session *i; | |
20263082 | 127 | |
fde78a3a | 128 | fputs("SESSIONS=", f); |
20263082 | 129 | LIST_FOREACH(sessions_by_seat, i, s->sessions) { |
14c3baca LP |
130 | fprintf(f, |
131 | "%s%c", | |
132 | i->id, | |
133 | i->sessions_by_seat_next ? ' ' : '\n'); | |
134 | } | |
20263082 | 135 | |
fde78a3a LP |
136 | fputs("UIDS=", f); |
137 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
20263082 | 138 | fprintf(f, |
90b2de37 ZJS |
139 | UID_FMT"%c", |
140 | i->user->uid, | |
14c3baca | 141 | i->sessions_by_seat_next ? ' ' : '\n'); |
20263082 LP |
142 | } |
143 | ||
144 | fflush(f); | |
14c3baca LP |
145 | |
146 | if (ferror(f) || rename(temp_path, s->state_file) < 0) { | |
20263082 LP |
147 | r = -errno; |
148 | unlink(s->state_file); | |
14c3baca | 149 | unlink(temp_path); |
20263082 LP |
150 | } |
151 | ||
14c3baca LP |
152 | finish: |
153 | if (r < 0) | |
da927ba9 | 154 | log_error_errno(r, "Failed to save seat data %s: %m", s->state_file); |
14c3baca | 155 | |
20263082 LP |
156 | return r; |
157 | } | |
158 | ||
159 | int seat_load(Seat *s) { | |
160 | assert(s); | |
161 | ||
a185c5aa LP |
162 | /* There isn't actually anything to read here ... */ |
163 | ||
20263082 LP |
164 | return 0; |
165 | } | |
166 | ||
92bd5ff3 | 167 | static int vt_allocate(unsigned int vtnr) { |
61376f96 | 168 | char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned int)]; |
cc377381 | 169 | _cleanup_close_ int fd = -1; |
20263082 LP |
170 | |
171 | assert(vtnr >= 1); | |
172 | ||
61376f96 | 173 | snprintf(p, sizeof(p), "/dev/tty%u", vtnr); |
20263082 | 174 | fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC); |
cc377381 LP |
175 | if (fd < 0) |
176 | return -errno; | |
20263082 | 177 | |
cc377381 | 178 | return 0; |
20263082 LP |
179 | } |
180 | ||
30ed21ce | 181 | int seat_preallocate_vts(Seat *s) { |
3f49d45a LP |
182 | int r = 0; |
183 | unsigned i; | |
20263082 LP |
184 | |
185 | assert(s); | |
186 | assert(s->manager); | |
187 | ||
30ed21ce LP |
188 | log_debug("Preallocating VTs..."); |
189 | ||
20263082 LP |
190 | if (s->manager->n_autovts <= 0) |
191 | return 0; | |
192 | ||
bf7825ae | 193 | if (!seat_has_vts(s)) |
20263082 LP |
194 | return 0; |
195 | ||
e7886786 | 196 | for (i = 1; i <= s->manager->n_autovts; i++) { |
20263082 LP |
197 | int q; |
198 | ||
199 | q = vt_allocate(i); | |
14c3baca | 200 | if (q < 0) { |
1fa2f38f | 201 | log_error_errno(q, "Failed to preallocate VT %u: %m", i); |
20263082 | 202 | r = q; |
14c3baca | 203 | } |
20263082 LP |
204 | } |
205 | ||
206 | return r; | |
207 | } | |
208 | ||
5eda94dd LP |
209 | int seat_apply_acls(Seat *s, Session *old_active) { |
210 | int r; | |
20263082 | 211 | |
5eda94dd | 212 | assert(s); |
20263082 | 213 | |
5eda94dd LP |
214 | r = devnode_acl_all(s->manager->udev, |
215 | s->id, | |
216 | false, | |
217 | !!old_active, old_active ? old_active->user->uid : 0, | |
218 | !!s->active, s->active ? s->active->user->uid : 0); | |
20263082 | 219 | |
5eda94dd | 220 | if (r < 0) |
da927ba9 | 221 | log_error_errno(r, "Failed to apply ACLs: %m"); |
20263082 LP |
222 | |
223 | return r; | |
224 | } | |
225 | ||
9418f147 LP |
226 | int seat_set_active(Seat *s, Session *session) { |
227 | Session *old_active; | |
228 | ||
229 | assert(s); | |
77527da0 | 230 | assert(!session || session->seat == s); |
9418f147 LP |
231 | |
232 | if (session == s->active) | |
233 | return 0; | |
234 | ||
235 | old_active = s->active; | |
236 | s->active = session; | |
237 | ||
dfd55270 | 238 | if (old_active) { |
118ecf32 | 239 | session_device_pause_all(old_active); |
cc377381 | 240 | session_send_changed(old_active, "Active", NULL); |
dfd55270 | 241 | } |
118ecf32 | 242 | |
9418f147 LP |
243 | seat_apply_acls(s, old_active); |
244 | ||
118ecf32 | 245 | if (session && session->started) { |
cc377381 | 246 | session_send_changed(session, "Active", NULL); |
118ecf32 DH |
247 | session_device_resume_all(session); |
248 | } | |
9418f147 LP |
249 | |
250 | if (!session || session->started) | |
cc377381 | 251 | seat_send_changed(s, "ActiveSession", NULL); |
9418f147 | 252 | |
98a28fef LP |
253 | seat_save(s); |
254 | ||
7f7bb946 | 255 | if (session) { |
98a28fef | 256 | session_save(session); |
7f7bb946 LP |
257 | user_save(session->user); |
258 | } | |
98a28fef | 259 | |
7f7bb946 | 260 | if (old_active) { |
98a28fef | 261 | session_save(old_active); |
78ab361c CG |
262 | if (!session || session->user != old_active->user) |
263 | user_save(old_active->user); | |
7f7bb946 | 264 | } |
98a28fef | 265 | |
9418f147 LP |
266 | return 0; |
267 | } | |
268 | ||
49e6fdbf DH |
269 | int seat_switch_to(Seat *s, unsigned int num) { |
270 | /* Public session positions skip 0 (there is only F1-F12). Maybe it | |
271 | * will get reassigned in the future, so return error for now. */ | |
55493982 | 272 | if (num == 0) |
49e6fdbf DH |
273 | return -EINVAL; |
274 | ||
15403427 DH |
275 | if (num >= s->position_count || !s->positions[num]) { |
276 | /* allow switching to unused VTs to trigger auto-activate */ | |
277 | if (seat_has_vts(s) && num < 64) | |
278 | return chvt(num); | |
279 | ||
49e6fdbf | 280 | return -EINVAL; |
15403427 | 281 | } |
49e6fdbf DH |
282 | |
283 | return session_activate(s->positions[num]); | |
284 | } | |
285 | ||
286 | int seat_switch_to_next(Seat *s) { | |
287 | unsigned int start, i; | |
288 | ||
55493982 | 289 | if (s->position_count == 0) |
49e6fdbf DH |
290 | return -EINVAL; |
291 | ||
292 | start = 1; | |
e6494a07 DH |
293 | if (s->active && s->active->position > 0) |
294 | start = s->active->position; | |
49e6fdbf DH |
295 | |
296 | for (i = start + 1; i < s->position_count; ++i) | |
297 | if (s->positions[i]) | |
298 | return session_activate(s->positions[i]); | |
299 | ||
300 | for (i = 1; i < start; ++i) | |
301 | if (s->positions[i]) | |
302 | return session_activate(s->positions[i]); | |
303 | ||
304 | return -EINVAL; | |
305 | } | |
306 | ||
307 | int seat_switch_to_previous(Seat *s) { | |
308 | unsigned int start, i; | |
309 | ||
55493982 | 310 | if (s->position_count == 0) |
49e6fdbf DH |
311 | return -EINVAL; |
312 | ||
313 | start = 1; | |
e6494a07 DH |
314 | if (s->active && s->active->position > 0) |
315 | start = s->active->position; | |
49e6fdbf DH |
316 | |
317 | for (i = start - 1; i > 0; --i) | |
318 | if (s->positions[i]) | |
319 | return session_activate(s->positions[i]); | |
320 | ||
321 | for (i = s->position_count - 1; i > start; --i) | |
322 | if (s->positions[i]) | |
323 | return session_activate(s->positions[i]); | |
324 | ||
325 | return -EINVAL; | |
326 | } | |
327 | ||
92bd5ff3 | 328 | int seat_active_vt_changed(Seat *s, unsigned int vtnr) { |
9418f147 LP |
329 | Session *i, *new_active = NULL; |
330 | int r; | |
20263082 LP |
331 | |
332 | assert(s); | |
333 | assert(vtnr >= 1); | |
20263082 | 334 | |
bf7825ae | 335 | if (!seat_has_vts(s)) |
14c3baca LP |
336 | return -EINVAL; |
337 | ||
92bd5ff3 | 338 | log_debug("VT changed to %u", vtnr); |
20263082 | 339 | |
be94d954 MP |
340 | /* we might have earlier closing sessions on the same VT, so try to |
341 | * find a running one first */ | |
20263082 | 342 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
be94d954 | 343 | if (i->vtnr == vtnr && !i->stopping) { |
14c3baca | 344 | new_active = i; |
20263082 LP |
345 | break; |
346 | } | |
347 | ||
be94d954 MP |
348 | if (!new_active) { |
349 | /* no running one? then we can't decide which one is the | |
350 | * active one, let the first one win */ | |
351 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
352 | if (i->vtnr == vtnr) { | |
353 | new_active = i; | |
354 | break; | |
355 | } | |
356 | } | |
357 | ||
9418f147 | 358 | r = seat_set_active(s, new_active); |
5eda94dd | 359 | manager_spawn_autovt(s->manager, vtnr); |
20263082 | 360 | |
9418f147 | 361 | return r; |
20263082 LP |
362 | } |
363 | ||
14c3baca LP |
364 | int seat_read_active_vt(Seat *s) { |
365 | char t[64]; | |
366 | ssize_t k; | |
92bd5ff3 DH |
367 | unsigned int vtnr; |
368 | int r; | |
14c3baca LP |
369 | |
370 | assert(s); | |
371 | ||
bf7825ae | 372 | if (!seat_has_vts(s)) |
14c3baca LP |
373 | return 0; |
374 | ||
375 | lseek(s->manager->console_active_fd, SEEK_SET, 0); | |
376 | ||
377 | k = read(s->manager->console_active_fd, t, sizeof(t)-1); | |
378 | if (k <= 0) { | |
379 | log_error("Failed to read current console: %s", k < 0 ? strerror(-errno) : "EOF"); | |
380 | return k < 0 ? -errno : -EIO; | |
381 | } | |
382 | ||
383 | t[k] = 0; | |
384 | truncate_nl(t); | |
385 | ||
386 | if (!startswith(t, "tty")) { | |
387 | log_error("Hm, /sys/class/tty/tty0/active is badly formatted."); | |
388 | return -EIO; | |
389 | } | |
390 | ||
92bd5ff3 | 391 | r = safe_atou(t+3, &vtnr); |
14c3baca LP |
392 | if (r < 0) { |
393 | log_error("Failed to parse VT number %s", t+3); | |
394 | return r; | |
395 | } | |
396 | ||
92bd5ff3 | 397 | if (!vtnr) { |
14c3baca LP |
398 | log_error("VT number invalid: %s", t+3); |
399 | return -EIO; | |
400 | } | |
401 | ||
402 | return seat_active_vt_changed(s, vtnr); | |
403 | } | |
404 | ||
405 | int seat_start(Seat *s) { | |
406 | assert(s); | |
407 | ||
3f49d45a LP |
408 | if (s->started) |
409 | return 0; | |
410 | ||
877d54e9 | 411 | log_struct(LOG_INFO, |
e2cc6eca | 412 | LOG_MESSAGE_ID(SD_MESSAGE_SEAT_START), |
877d54e9 | 413 | "SEAT_ID=%s", s->id, |
e2cc6eca | 414 | LOG_MESSAGE("New seat %s.", s->id), |
877d54e9 | 415 | NULL); |
3f49d45a | 416 | |
14c3baca LP |
417 | /* Initialize VT magic stuff */ |
418 | seat_preallocate_vts(s); | |
419 | ||
420 | /* Read current VT */ | |
421 | seat_read_active_vt(s); | |
422 | ||
7f7bb946 LP |
423 | s->started = true; |
424 | ||
14c3baca LP |
425 | /* Save seat data */ |
426 | seat_save(s); | |
427 | ||
da119395 LP |
428 | seat_send_signal(s, true); |
429 | ||
14c3baca LP |
430 | return 0; |
431 | } | |
432 | ||
9bb69af4 | 433 | int seat_stop(Seat *s, bool force) { |
a185c5aa | 434 | int r = 0; |
20263082 LP |
435 | |
436 | assert(s); | |
437 | ||
ed18b08b | 438 | if (s->started) |
877d54e9 | 439 | log_struct(LOG_INFO, |
e2cc6eca | 440 | LOG_MESSAGE_ID(SD_MESSAGE_SEAT_STOP), |
877d54e9 | 441 | "SEAT_ID=%s", s->id, |
e2cc6eca | 442 | LOG_MESSAGE("Removed seat %s.", s->id), |
877d54e9 | 443 | NULL); |
da119395 | 444 | |
9bb69af4 | 445 | seat_stop_sessions(s, force); |
a185c5aa LP |
446 | |
447 | unlink(s->state_file); | |
448 | seat_add_to_gc_queue(s); | |
449 | ||
ed18b08b LP |
450 | if (s->started) |
451 | seat_send_signal(s, false); | |
452 | ||
a185c5aa LP |
453 | s->started = false; |
454 | ||
455 | return r; | |
456 | } | |
457 | ||
9bb69af4 | 458 | int seat_stop_sessions(Seat *s, bool force) { |
a185c5aa LP |
459 | Session *session; |
460 | int r = 0, k; | |
461 | ||
462 | assert(s); | |
463 | ||
20263082 | 464 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { |
9bb69af4 | 465 | k = session_stop(session, force); |
20263082 LP |
466 | if (k < 0) |
467 | r = k; | |
468 | } | |
469 | ||
a185c5aa LP |
470 | return r; |
471 | } | |
14c3baca | 472 | |
49e6fdbf | 473 | void seat_evict_position(Seat *s, Session *session) { |
3e6b205f | 474 | Session *iter; |
e6494a07 | 475 | unsigned int pos = session->position; |
49e6fdbf | 476 | |
e6494a07 | 477 | session->position = 0; |
49e6fdbf | 478 | |
55493982 | 479 | if (pos == 0) |
49e6fdbf DH |
480 | return; |
481 | ||
3e6b205f | 482 | if (pos < s->position_count && s->positions[pos] == session) { |
49e6fdbf | 483 | s->positions[pos] = NULL; |
3e6b205f DH |
484 | |
485 | /* There might be another session claiming the same | |
55493982 | 486 | * position (eg., during gdm->session transition), so let's look |
3e6b205f DH |
487 | * for it and set it on the free slot. */ |
488 | LIST_FOREACH(sessions_by_seat, iter, s->sessions) { | |
e6494a07 | 489 | if (iter->position == pos) { |
3e6b205f DH |
490 | s->positions[pos] = iter; |
491 | break; | |
492 | } | |
493 | } | |
494 | } | |
49e6fdbf DH |
495 | } |
496 | ||
497 | void seat_claim_position(Seat *s, Session *session, unsigned int pos) { | |
498 | /* with VTs, the position is always the same as the VTnr */ | |
499 | if (seat_has_vts(s)) | |
500 | pos = session->vtnr; | |
501 | ||
ca2d3784 | 502 | if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1)) |
49e6fdbf DH |
503 | return; |
504 | ||
505 | seat_evict_position(s, session); | |
506 | ||
e6494a07 | 507 | session->position = pos; |
49e6fdbf DH |
508 | if (pos > 0 && !s->positions[pos]) |
509 | s->positions[pos] = session; | |
510 | } | |
511 | ||
512 | static void seat_assign_position(Seat *s, Session *session) { | |
513 | unsigned int pos; | |
514 | ||
e6494a07 | 515 | if (session->position > 0) |
49e6fdbf DH |
516 | return; |
517 | ||
518 | for (pos = 1; pos < s->position_count; ++pos) | |
519 | if (!s->positions[pos]) | |
520 | break; | |
521 | ||
522 | seat_claim_position(s, session, pos); | |
523 | } | |
524 | ||
a185c5aa LP |
525 | int seat_attach_session(Seat *s, Session *session) { |
526 | assert(s); | |
527 | assert(session); | |
528 | assert(!session->seat); | |
3f49d45a | 529 | |
c506027a DH |
530 | if (!seat_has_vts(s) != !session->vtnr) |
531 | return -EINVAL; | |
532 | ||
a185c5aa | 533 | session->seat = s; |
71fda00f | 534 | LIST_PREPEND(sessions_by_seat, s->sessions, session); |
49e6fdbf | 535 | seat_assign_position(s, session); |
a185c5aa | 536 | |
cc377381 | 537 | seat_send_changed(s, "Sessions", NULL); |
9418f147 | 538 | |
bf7825ae | 539 | /* On seats with VTs, the VT logic defines which session is active. On |
3fdb2494 DH |
540 | * seats without VTs, we automatically activate new sessions. */ |
541 | if (!seat_has_vts(s)) | |
9418f147 | 542 | seat_set_active(s, session); |
9418f147 | 543 | |
a185c5aa LP |
544 | return 0; |
545 | } | |
546 | ||
d7bd01b5 DH |
547 | void seat_complete_switch(Seat *s) { |
548 | Session *session; | |
549 | ||
550 | assert(s); | |
551 | ||
552 | /* if no session-switch is pending or if it got canceled, do nothing */ | |
553 | if (!s->pending_switch) | |
554 | return; | |
555 | ||
556 | session = s->pending_switch; | |
557 | s->pending_switch = NULL; | |
558 | ||
559 | seat_set_active(s, session); | |
560 | } | |
561 | ||
bf7825ae DH |
562 | bool seat_has_vts(Seat *s) { |
563 | assert(s); | |
564 | ||
565 | return seat_is_seat0(s) && s->manager->console_active_fd >= 0; | |
566 | } | |
567 | ||
92432fcc | 568 | bool seat_is_seat0(Seat *s) { |
a185c5aa LP |
569 | assert(s); |
570 | ||
92432fcc | 571 | return s->manager->seat0 == s; |
a185c5aa LP |
572 | } |
573 | ||
addedec4 LP |
574 | bool seat_can_multi_session(Seat *s) { |
575 | assert(s); | |
576 | ||
bf7825ae | 577 | return seat_has_vts(s); |
addedec4 LP |
578 | } |
579 | ||
f1a8e221 LP |
580 | bool seat_can_tty(Seat *s) { |
581 | assert(s); | |
582 | ||
bf7825ae | 583 | return seat_has_vts(s); |
f1a8e221 LP |
584 | } |
585 | ||
718d006a DH |
586 | bool seat_has_master_device(Seat *s) { |
587 | assert(s); | |
588 | ||
589 | /* device list is ordered by "master" flag */ | |
590 | return !!s->devices && s->devices->master; | |
591 | } | |
592 | ||
f1a8e221 LP |
593 | bool seat_can_graphical(Seat *s) { |
594 | assert(s); | |
595 | ||
718d006a | 596 | return seat_has_master_device(s); |
f1a8e221 LP |
597 | } |
598 | ||
a185c5aa LP |
599 | int seat_get_idle_hint(Seat *s, dual_timestamp *t) { |
600 | Session *session; | |
601 | bool idle_hint = true; | |
5cb14b37 | 602 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
a185c5aa LP |
603 | |
604 | assert(s); | |
605 | ||
606 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { | |
607 | dual_timestamp k; | |
608 | int ih; | |
609 | ||
610 | ih = session_get_idle_hint(session, &k); | |
611 | if (ih < 0) | |
612 | return ih; | |
613 | ||
614 | if (!ih) { | |
615 | if (!idle_hint) { | |
4a271908 | 616 | if (k.monotonic > ts.monotonic) |
a185c5aa LP |
617 | ts = k; |
618 | } else { | |
619 | idle_hint = false; | |
620 | ts = k; | |
621 | } | |
622 | } else if (idle_hint) { | |
623 | ||
624 | if (k.monotonic > ts.monotonic) | |
625 | ts = k; | |
626 | } | |
627 | } | |
628 | ||
629 | if (t) | |
630 | *t = ts; | |
631 | ||
632 | return idle_hint; | |
20263082 | 633 | } |
14c3baca | 634 | |
cc377381 | 635 | bool seat_check_gc(Seat *s, bool drop_not_started) { |
14c3baca LP |
636 | assert(s); |
637 | ||
4a4b033f | 638 | if (drop_not_started && !s->started) |
cc377381 | 639 | return false; |
932e3ee7 | 640 | |
92432fcc | 641 | if (seat_is_seat0(s)) |
cc377381 | 642 | return true; |
14c3baca | 643 | |
718d006a | 644 | return seat_has_master_device(s); |
14c3baca LP |
645 | } |
646 | ||
647 | void seat_add_to_gc_queue(Seat *s) { | |
648 | assert(s); | |
649 | ||
650 | if (s->in_gc_queue) | |
651 | return; | |
652 | ||
71fda00f | 653 | LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca LP |
654 | s->in_gc_queue = true; |
655 | } | |
3f49d45a LP |
656 | |
657 | static bool seat_name_valid_char(char c) { | |
658 | return | |
659 | (c >= 'a' && c <= 'z') || | |
660 | (c >= 'A' && c <= 'Z') || | |
661 | (c >= '0' && c <= '9') || | |
662 | c == '-' || | |
663 | c == '_'; | |
664 | } | |
665 | ||
666 | bool seat_name_is_valid(const char *name) { | |
667 | const char *p; | |
668 | ||
669 | assert(name); | |
670 | ||
671 | if (!startswith(name, "seat")) | |
672 | return false; | |
673 | ||
674 | if (!name[4]) | |
675 | return false; | |
676 | ||
677 | for (p = name; *p; p++) | |
678 | if (!seat_name_valid_char(*p)) | |
679 | return false; | |
680 | ||
1c9a2c10 LP |
681 | if (strlen(name) > 255) |
682 | return false; | |
683 | ||
3f49d45a LP |
684 | return true; |
685 | } |