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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 | 22 | #include <errno.h> |
20263082 | 23 | #include <fcntl.h> |
5eda94dd | 24 | #include <string.h> |
07630cea | 25 | #include <unistd.h> |
20263082 | 26 | |
cc377381 | 27 | #include "sd-messages.h" |
07630cea | 28 | |
3ffd4af2 | 29 | #include "fd-util.h" |
07630cea | 30 | #include "formats-util.h" |
5eda94dd | 31 | #include "logind-acl.h" |
3ffd4af2 | 32 | #include "logind-seat.h" |
49e942b2 | 33 | #include "mkdir.h" |
6bedfcbb | 34 | #include "parse-util.h" |
07630cea | 35 | #include "string-util.h" |
288a74cc | 36 | #include "terminal-util.h" |
07630cea | 37 | #include "util.h" |
20263082 LP |
38 | |
39 | Seat *seat_new(Manager *m, const char *id) { | |
40 | Seat *s; | |
41 | ||
42 | assert(m); | |
43 | assert(id); | |
44 | ||
45 | s = new0(Seat, 1); | |
46 | if (!s) | |
47 | return NULL; | |
48 | ||
98a28fef | 49 | s->state_file = strappend("/run/systemd/seats/", id); |
20263082 LP |
50 | if (!s->state_file) { |
51 | free(s); | |
52 | return NULL; | |
53 | } | |
54 | ||
2b6bf07d | 55 | s->id = basename(s->state_file); |
14c3baca | 56 | s->manager = m; |
20263082 LP |
57 | |
58 | if (hashmap_put(m->seats, s->id, s) < 0) { | |
14c3baca | 59 | free(s->state_file); |
20263082 LP |
60 | free(s); |
61 | return NULL; | |
62 | } | |
63 | ||
20263082 LP |
64 | return s; |
65 | } | |
66 | ||
67 | void seat_free(Seat *s) { | |
68 | assert(s); | |
69 | ||
14c3baca | 70 | if (s->in_gc_queue) |
71fda00f | 71 | LIST_REMOVE(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca | 72 | |
20263082 LP |
73 | while (s->sessions) |
74 | session_free(s->sessions); | |
75 | ||
76 | assert(!s->active); | |
77 | ||
78 | while (s->devices) | |
79 | device_free(s->devices); | |
80 | ||
81 | hashmap_remove(s->manager->seats, s->id); | |
82 | ||
49e6fdbf | 83 | free(s->positions); |
d2f92cdf | 84 | free(s->state_file); |
20263082 LP |
85 | free(s); |
86 | } | |
87 | ||
88 | int seat_save(Seat *s) { | |
cc377381 LP |
89 | _cleanup_free_ char *temp_path = NULL; |
90 | _cleanup_fclose_ FILE *f = NULL; | |
20263082 LP |
91 | int r; |
92 | ||
93 | assert(s); | |
94 | ||
accaeded LP |
95 | if (!s->started) |
96 | return 0; | |
97 | ||
d2e54fae | 98 | r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0); |
20263082 | 99 | if (r < 0) |
dacd6cee | 100 | goto fail; |
14c3baca LP |
101 | |
102 | r = fopen_temporary(s->state_file, &f, &temp_path); | |
103 | if (r < 0) | |
dacd6cee | 104 | goto fail; |
20263082 | 105 | |
14c3baca | 106 | fchmod(fileno(f), 0644); |
20263082 LP |
107 | |
108 | fprintf(f, | |
14c3baca | 109 | "# This is private data. Do not parse.\n" |
92432fcc | 110 | "IS_SEAT0=%i\n" |
f1a8e221 LP |
111 | "CAN_MULTI_SESSION=%i\n" |
112 | "CAN_TTY=%i\n" | |
113 | "CAN_GRAPHICAL=%i\n", | |
92432fcc | 114 | seat_is_seat0(s), |
f1a8e221 LP |
115 | seat_can_multi_session(s), |
116 | seat_can_tty(s), | |
117 | seat_can_graphical(s)); | |
20263082 LP |
118 | |
119 | if (s->active) { | |
120 | assert(s->active->user); | |
121 | ||
122 | fprintf(f, | |
123 | "ACTIVE=%s\n" | |
a08ac7e0 | 124 | "ACTIVE_UID="UID_FMT"\n", |
20263082 | 125 | s->active->id, |
a08ac7e0 | 126 | s->active->user->uid); |
20263082 LP |
127 | } |
128 | ||
129 | if (s->sessions) { | |
130 | Session *i; | |
20263082 | 131 | |
fde78a3a | 132 | fputs("SESSIONS=", f); |
20263082 | 133 | LIST_FOREACH(sessions_by_seat, i, s->sessions) { |
14c3baca LP |
134 | fprintf(f, |
135 | "%s%c", | |
136 | i->id, | |
137 | i->sessions_by_seat_next ? ' ' : '\n'); | |
138 | } | |
20263082 | 139 | |
fde78a3a LP |
140 | fputs("UIDS=", f); |
141 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
20263082 | 142 | fprintf(f, |
90b2de37 ZJS |
143 | UID_FMT"%c", |
144 | i->user->uid, | |
14c3baca | 145 | i->sessions_by_seat_next ? ' ' : '\n'); |
20263082 LP |
146 | } |
147 | ||
dacd6cee LP |
148 | r = fflush_and_check(f); |
149 | if (r < 0) | |
150 | goto fail; | |
14c3baca | 151 | |
dacd6cee | 152 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 153 | r = -errno; |
dacd6cee | 154 | goto fail; |
20263082 LP |
155 | } |
156 | ||
dacd6cee LP |
157 | return 0; |
158 | ||
159 | fail: | |
160 | (void) unlink(s->state_file); | |
161 | ||
162 | if (temp_path) | |
163 | (void) unlink(temp_path); | |
14c3baca | 164 | |
dacd6cee | 165 | return log_error_errno(r, "Failed to save seat data %s: %m", s->state_file); |
20263082 LP |
166 | } |
167 | ||
168 | int seat_load(Seat *s) { | |
169 | assert(s); | |
170 | ||
a185c5aa LP |
171 | /* There isn't actually anything to read here ... */ |
172 | ||
20263082 LP |
173 | return 0; |
174 | } | |
175 | ||
92bd5ff3 | 176 | static int vt_allocate(unsigned int vtnr) { |
61376f96 | 177 | char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned int)]; |
cc377381 | 178 | _cleanup_close_ int fd = -1; |
20263082 LP |
179 | |
180 | assert(vtnr >= 1); | |
181 | ||
61376f96 | 182 | snprintf(p, sizeof(p), "/dev/tty%u", vtnr); |
20263082 | 183 | fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC); |
cc377381 LP |
184 | if (fd < 0) |
185 | return -errno; | |
20263082 | 186 | |
cc377381 | 187 | return 0; |
20263082 LP |
188 | } |
189 | ||
30ed21ce | 190 | int seat_preallocate_vts(Seat *s) { |
3f49d45a LP |
191 | int r = 0; |
192 | unsigned i; | |
20263082 LP |
193 | |
194 | assert(s); | |
195 | assert(s->manager); | |
196 | ||
30ed21ce LP |
197 | log_debug("Preallocating VTs..."); |
198 | ||
20263082 LP |
199 | if (s->manager->n_autovts <= 0) |
200 | return 0; | |
201 | ||
bf7825ae | 202 | if (!seat_has_vts(s)) |
20263082 LP |
203 | return 0; |
204 | ||
e7886786 | 205 | for (i = 1; i <= s->manager->n_autovts; i++) { |
20263082 LP |
206 | int q; |
207 | ||
208 | q = vt_allocate(i); | |
14c3baca | 209 | if (q < 0) { |
1fa2f38f | 210 | log_error_errno(q, "Failed to preallocate VT %u: %m", i); |
20263082 | 211 | r = q; |
14c3baca | 212 | } |
20263082 LP |
213 | } |
214 | ||
215 | return r; | |
216 | } | |
217 | ||
5eda94dd LP |
218 | int seat_apply_acls(Seat *s, Session *old_active) { |
219 | int r; | |
20263082 | 220 | |
5eda94dd | 221 | assert(s); |
20263082 | 222 | |
5eda94dd LP |
223 | r = devnode_acl_all(s->manager->udev, |
224 | s->id, | |
225 | false, | |
226 | !!old_active, old_active ? old_active->user->uid : 0, | |
227 | !!s->active, s->active ? s->active->user->uid : 0); | |
20263082 | 228 | |
5eda94dd | 229 | if (r < 0) |
da927ba9 | 230 | log_error_errno(r, "Failed to apply ACLs: %m"); |
20263082 LP |
231 | |
232 | return r; | |
233 | } | |
234 | ||
9418f147 LP |
235 | int seat_set_active(Seat *s, Session *session) { |
236 | Session *old_active; | |
237 | ||
238 | assert(s); | |
77527da0 | 239 | assert(!session || session->seat == s); |
9418f147 LP |
240 | |
241 | if (session == s->active) | |
242 | return 0; | |
243 | ||
244 | old_active = s->active; | |
245 | s->active = session; | |
246 | ||
dfd55270 | 247 | if (old_active) { |
118ecf32 | 248 | session_device_pause_all(old_active); |
cc377381 | 249 | session_send_changed(old_active, "Active", NULL); |
dfd55270 | 250 | } |
118ecf32 | 251 | |
9418f147 LP |
252 | seat_apply_acls(s, old_active); |
253 | ||
118ecf32 | 254 | if (session && session->started) { |
cc377381 | 255 | session_send_changed(session, "Active", NULL); |
118ecf32 DH |
256 | session_device_resume_all(session); |
257 | } | |
9418f147 LP |
258 | |
259 | if (!session || session->started) | |
cc377381 | 260 | seat_send_changed(s, "ActiveSession", NULL); |
9418f147 | 261 | |
98a28fef LP |
262 | seat_save(s); |
263 | ||
7f7bb946 | 264 | if (session) { |
98a28fef | 265 | session_save(session); |
7f7bb946 LP |
266 | user_save(session->user); |
267 | } | |
98a28fef | 268 | |
7f7bb946 | 269 | if (old_active) { |
98a28fef | 270 | session_save(old_active); |
78ab361c CG |
271 | if (!session || session->user != old_active->user) |
272 | user_save(old_active->user); | |
7f7bb946 | 273 | } |
98a28fef | 274 | |
9418f147 LP |
275 | return 0; |
276 | } | |
277 | ||
49e6fdbf DH |
278 | int seat_switch_to(Seat *s, unsigned int num) { |
279 | /* Public session positions skip 0 (there is only F1-F12). Maybe it | |
280 | * will get reassigned in the future, so return error for now. */ | |
55493982 | 281 | if (num == 0) |
49e6fdbf DH |
282 | return -EINVAL; |
283 | ||
15403427 DH |
284 | if (num >= s->position_count || !s->positions[num]) { |
285 | /* allow switching to unused VTs to trigger auto-activate */ | |
286 | if (seat_has_vts(s) && num < 64) | |
287 | return chvt(num); | |
288 | ||
49e6fdbf | 289 | return -EINVAL; |
15403427 | 290 | } |
49e6fdbf DH |
291 | |
292 | return session_activate(s->positions[num]); | |
293 | } | |
294 | ||
295 | int seat_switch_to_next(Seat *s) { | |
296 | unsigned int start, i; | |
297 | ||
55493982 | 298 | if (s->position_count == 0) |
49e6fdbf DH |
299 | return -EINVAL; |
300 | ||
301 | start = 1; | |
e6494a07 DH |
302 | if (s->active && s->active->position > 0) |
303 | start = s->active->position; | |
49e6fdbf DH |
304 | |
305 | for (i = start + 1; i < s->position_count; ++i) | |
306 | if (s->positions[i]) | |
307 | return session_activate(s->positions[i]); | |
308 | ||
309 | for (i = 1; i < start; ++i) | |
310 | if (s->positions[i]) | |
311 | return session_activate(s->positions[i]); | |
312 | ||
313 | return -EINVAL; | |
314 | } | |
315 | ||
316 | int seat_switch_to_previous(Seat *s) { | |
317 | unsigned int start, i; | |
318 | ||
55493982 | 319 | if (s->position_count == 0) |
49e6fdbf DH |
320 | return -EINVAL; |
321 | ||
322 | start = 1; | |
e6494a07 DH |
323 | if (s->active && s->active->position > 0) |
324 | start = s->active->position; | |
49e6fdbf DH |
325 | |
326 | for (i = start - 1; i > 0; --i) | |
327 | if (s->positions[i]) | |
328 | return session_activate(s->positions[i]); | |
329 | ||
330 | for (i = s->position_count - 1; i > start; --i) | |
331 | if (s->positions[i]) | |
332 | return session_activate(s->positions[i]); | |
333 | ||
334 | return -EINVAL; | |
335 | } | |
336 | ||
92bd5ff3 | 337 | int seat_active_vt_changed(Seat *s, unsigned int vtnr) { |
9418f147 LP |
338 | Session *i, *new_active = NULL; |
339 | int r; | |
20263082 LP |
340 | |
341 | assert(s); | |
342 | assert(vtnr >= 1); | |
20263082 | 343 | |
bf7825ae | 344 | if (!seat_has_vts(s)) |
14c3baca LP |
345 | return -EINVAL; |
346 | ||
92bd5ff3 | 347 | log_debug("VT changed to %u", vtnr); |
20263082 | 348 | |
be94d954 MP |
349 | /* we might have earlier closing sessions on the same VT, so try to |
350 | * find a running one first */ | |
20263082 | 351 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
be94d954 | 352 | if (i->vtnr == vtnr && !i->stopping) { |
14c3baca | 353 | new_active = i; |
20263082 LP |
354 | break; |
355 | } | |
356 | ||
be94d954 MP |
357 | if (!new_active) { |
358 | /* no running one? then we can't decide which one is the | |
359 | * active one, let the first one win */ | |
360 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
361 | if (i->vtnr == vtnr) { | |
362 | new_active = i; | |
363 | break; | |
364 | } | |
365 | } | |
366 | ||
9418f147 | 367 | r = seat_set_active(s, new_active); |
5eda94dd | 368 | manager_spawn_autovt(s->manager, vtnr); |
20263082 | 369 | |
9418f147 | 370 | return r; |
20263082 LP |
371 | } |
372 | ||
14c3baca LP |
373 | int seat_read_active_vt(Seat *s) { |
374 | char t[64]; | |
375 | ssize_t k; | |
92bd5ff3 DH |
376 | unsigned int vtnr; |
377 | int r; | |
14c3baca LP |
378 | |
379 | assert(s); | |
380 | ||
bf7825ae | 381 | if (!seat_has_vts(s)) |
14c3baca LP |
382 | return 0; |
383 | ||
384 | lseek(s->manager->console_active_fd, SEEK_SET, 0); | |
385 | ||
386 | k = read(s->manager->console_active_fd, t, sizeof(t)-1); | |
387 | if (k <= 0) { | |
388 | log_error("Failed to read current console: %s", k < 0 ? strerror(-errno) : "EOF"); | |
389 | return k < 0 ? -errno : -EIO; | |
390 | } | |
391 | ||
392 | t[k] = 0; | |
393 | truncate_nl(t); | |
394 | ||
395 | if (!startswith(t, "tty")) { | |
396 | log_error("Hm, /sys/class/tty/tty0/active is badly formatted."); | |
397 | return -EIO; | |
398 | } | |
399 | ||
92bd5ff3 | 400 | r = safe_atou(t+3, &vtnr); |
14c3baca LP |
401 | if (r < 0) { |
402 | log_error("Failed to parse VT number %s", t+3); | |
403 | return r; | |
404 | } | |
405 | ||
92bd5ff3 | 406 | if (!vtnr) { |
14c3baca LP |
407 | log_error("VT number invalid: %s", t+3); |
408 | return -EIO; | |
409 | } | |
410 | ||
411 | return seat_active_vt_changed(s, vtnr); | |
412 | } | |
413 | ||
414 | int seat_start(Seat *s) { | |
415 | assert(s); | |
416 | ||
3f49d45a LP |
417 | if (s->started) |
418 | return 0; | |
419 | ||
877d54e9 | 420 | log_struct(LOG_INFO, |
e2cc6eca | 421 | LOG_MESSAGE_ID(SD_MESSAGE_SEAT_START), |
877d54e9 | 422 | "SEAT_ID=%s", s->id, |
e2cc6eca | 423 | LOG_MESSAGE("New seat %s.", s->id), |
877d54e9 | 424 | NULL); |
3f49d45a | 425 | |
14c3baca LP |
426 | /* Initialize VT magic stuff */ |
427 | seat_preallocate_vts(s); | |
428 | ||
429 | /* Read current VT */ | |
430 | seat_read_active_vt(s); | |
431 | ||
7f7bb946 LP |
432 | s->started = true; |
433 | ||
14c3baca LP |
434 | /* Save seat data */ |
435 | seat_save(s); | |
436 | ||
da119395 LP |
437 | seat_send_signal(s, true); |
438 | ||
14c3baca LP |
439 | return 0; |
440 | } | |
441 | ||
9bb69af4 | 442 | int seat_stop(Seat *s, bool force) { |
a185c5aa | 443 | int r = 0; |
20263082 LP |
444 | |
445 | assert(s); | |
446 | ||
ed18b08b | 447 | if (s->started) |
877d54e9 | 448 | log_struct(LOG_INFO, |
e2cc6eca | 449 | LOG_MESSAGE_ID(SD_MESSAGE_SEAT_STOP), |
877d54e9 | 450 | "SEAT_ID=%s", s->id, |
e2cc6eca | 451 | LOG_MESSAGE("Removed seat %s.", s->id), |
877d54e9 | 452 | NULL); |
da119395 | 453 | |
9bb69af4 | 454 | seat_stop_sessions(s, force); |
a185c5aa LP |
455 | |
456 | unlink(s->state_file); | |
457 | seat_add_to_gc_queue(s); | |
458 | ||
ed18b08b LP |
459 | if (s->started) |
460 | seat_send_signal(s, false); | |
461 | ||
a185c5aa LP |
462 | s->started = false; |
463 | ||
464 | return r; | |
465 | } | |
466 | ||
9bb69af4 | 467 | int seat_stop_sessions(Seat *s, bool force) { |
a185c5aa LP |
468 | Session *session; |
469 | int r = 0, k; | |
470 | ||
471 | assert(s); | |
472 | ||
20263082 | 473 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { |
9bb69af4 | 474 | k = session_stop(session, force); |
20263082 LP |
475 | if (k < 0) |
476 | r = k; | |
477 | } | |
478 | ||
a185c5aa LP |
479 | return r; |
480 | } | |
14c3baca | 481 | |
49e6fdbf | 482 | void seat_evict_position(Seat *s, Session *session) { |
3e6b205f | 483 | Session *iter; |
e6494a07 | 484 | unsigned int pos = session->position; |
49e6fdbf | 485 | |
e6494a07 | 486 | session->position = 0; |
49e6fdbf | 487 | |
55493982 | 488 | if (pos == 0) |
49e6fdbf DH |
489 | return; |
490 | ||
3e6b205f | 491 | if (pos < s->position_count && s->positions[pos] == session) { |
49e6fdbf | 492 | s->positions[pos] = NULL; |
3e6b205f DH |
493 | |
494 | /* There might be another session claiming the same | |
55493982 | 495 | * position (eg., during gdm->session transition), so let's look |
3e6b205f DH |
496 | * for it and set it on the free slot. */ |
497 | LIST_FOREACH(sessions_by_seat, iter, s->sessions) { | |
28103328 | 498 | if (iter->position == pos && session_get_state(iter) != SESSION_CLOSING) { |
3e6b205f DH |
499 | s->positions[pos] = iter; |
500 | break; | |
501 | } | |
502 | } | |
503 | } | |
49e6fdbf DH |
504 | } |
505 | ||
506 | void seat_claim_position(Seat *s, Session *session, unsigned int pos) { | |
507 | /* with VTs, the position is always the same as the VTnr */ | |
508 | if (seat_has_vts(s)) | |
509 | pos = session->vtnr; | |
510 | ||
ca2d3784 | 511 | if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1)) |
49e6fdbf DH |
512 | return; |
513 | ||
514 | seat_evict_position(s, session); | |
515 | ||
e6494a07 | 516 | session->position = pos; |
da770c38 | 517 | if (pos > 0) |
49e6fdbf DH |
518 | s->positions[pos] = session; |
519 | } | |
520 | ||
521 | static void seat_assign_position(Seat *s, Session *session) { | |
522 | unsigned int pos; | |
523 | ||
e6494a07 | 524 | if (session->position > 0) |
49e6fdbf DH |
525 | return; |
526 | ||
527 | for (pos = 1; pos < s->position_count; ++pos) | |
528 | if (!s->positions[pos]) | |
529 | break; | |
530 | ||
531 | seat_claim_position(s, session, pos); | |
532 | } | |
533 | ||
a185c5aa LP |
534 | int seat_attach_session(Seat *s, Session *session) { |
535 | assert(s); | |
536 | assert(session); | |
537 | assert(!session->seat); | |
3f49d45a | 538 | |
c506027a DH |
539 | if (!seat_has_vts(s) != !session->vtnr) |
540 | return -EINVAL; | |
541 | ||
a185c5aa | 542 | session->seat = s; |
71fda00f | 543 | LIST_PREPEND(sessions_by_seat, s->sessions, session); |
49e6fdbf | 544 | seat_assign_position(s, session); |
a185c5aa | 545 | |
cc377381 | 546 | seat_send_changed(s, "Sessions", NULL); |
9418f147 | 547 | |
bf7825ae | 548 | /* On seats with VTs, the VT logic defines which session is active. On |
3fdb2494 DH |
549 | * seats without VTs, we automatically activate new sessions. */ |
550 | if (!seat_has_vts(s)) | |
9418f147 | 551 | seat_set_active(s, session); |
9418f147 | 552 | |
a185c5aa LP |
553 | return 0; |
554 | } | |
555 | ||
d7bd01b5 DH |
556 | void seat_complete_switch(Seat *s) { |
557 | Session *session; | |
558 | ||
559 | assert(s); | |
560 | ||
561 | /* if no session-switch is pending or if it got canceled, do nothing */ | |
562 | if (!s->pending_switch) | |
563 | return; | |
564 | ||
565 | session = s->pending_switch; | |
566 | s->pending_switch = NULL; | |
567 | ||
568 | seat_set_active(s, session); | |
569 | } | |
570 | ||
bf7825ae DH |
571 | bool seat_has_vts(Seat *s) { |
572 | assert(s); | |
573 | ||
574 | return seat_is_seat0(s) && s->manager->console_active_fd >= 0; | |
575 | } | |
576 | ||
92432fcc | 577 | bool seat_is_seat0(Seat *s) { |
a185c5aa LP |
578 | assert(s); |
579 | ||
92432fcc | 580 | return s->manager->seat0 == s; |
a185c5aa LP |
581 | } |
582 | ||
addedec4 LP |
583 | bool seat_can_multi_session(Seat *s) { |
584 | assert(s); | |
585 | ||
bf7825ae | 586 | return seat_has_vts(s); |
addedec4 LP |
587 | } |
588 | ||
f1a8e221 LP |
589 | bool seat_can_tty(Seat *s) { |
590 | assert(s); | |
591 | ||
bf7825ae | 592 | return seat_has_vts(s); |
f1a8e221 LP |
593 | } |
594 | ||
718d006a DH |
595 | bool seat_has_master_device(Seat *s) { |
596 | assert(s); | |
597 | ||
598 | /* device list is ordered by "master" flag */ | |
599 | return !!s->devices && s->devices->master; | |
600 | } | |
601 | ||
f1a8e221 LP |
602 | bool seat_can_graphical(Seat *s) { |
603 | assert(s); | |
604 | ||
718d006a | 605 | return seat_has_master_device(s); |
f1a8e221 LP |
606 | } |
607 | ||
a185c5aa LP |
608 | int seat_get_idle_hint(Seat *s, dual_timestamp *t) { |
609 | Session *session; | |
610 | bool idle_hint = true; | |
5cb14b37 | 611 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
a185c5aa LP |
612 | |
613 | assert(s); | |
614 | ||
615 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { | |
616 | dual_timestamp k; | |
617 | int ih; | |
618 | ||
619 | ih = session_get_idle_hint(session, &k); | |
620 | if (ih < 0) | |
621 | return ih; | |
622 | ||
623 | if (!ih) { | |
624 | if (!idle_hint) { | |
4a271908 | 625 | if (k.monotonic > ts.monotonic) |
a185c5aa LP |
626 | ts = k; |
627 | } else { | |
628 | idle_hint = false; | |
629 | ts = k; | |
630 | } | |
631 | } else if (idle_hint) { | |
632 | ||
633 | if (k.monotonic > ts.monotonic) | |
634 | ts = k; | |
635 | } | |
636 | } | |
637 | ||
638 | if (t) | |
639 | *t = ts; | |
640 | ||
641 | return idle_hint; | |
20263082 | 642 | } |
14c3baca | 643 | |
cc377381 | 644 | bool seat_check_gc(Seat *s, bool drop_not_started) { |
14c3baca LP |
645 | assert(s); |
646 | ||
4a4b033f | 647 | if (drop_not_started && !s->started) |
cc377381 | 648 | return false; |
932e3ee7 | 649 | |
92432fcc | 650 | if (seat_is_seat0(s)) |
cc377381 | 651 | return true; |
14c3baca | 652 | |
718d006a | 653 | return seat_has_master_device(s); |
14c3baca LP |
654 | } |
655 | ||
656 | void seat_add_to_gc_queue(Seat *s) { | |
657 | assert(s); | |
658 | ||
659 | if (s->in_gc_queue) | |
660 | return; | |
661 | ||
71fda00f | 662 | LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca LP |
663 | s->in_gc_queue = true; |
664 | } | |
3f49d45a LP |
665 | |
666 | static bool seat_name_valid_char(char c) { | |
667 | return | |
668 | (c >= 'a' && c <= 'z') || | |
669 | (c >= 'A' && c <= 'Z') || | |
670 | (c >= '0' && c <= '9') || | |
671 | c == '-' || | |
672 | c == '_'; | |
673 | } | |
674 | ||
675 | bool seat_name_is_valid(const char *name) { | |
676 | const char *p; | |
677 | ||
678 | assert(name); | |
679 | ||
680 | if (!startswith(name, "seat")) | |
681 | return false; | |
682 | ||
683 | if (!name[4]) | |
684 | return false; | |
685 | ||
686 | for (p = name; *p; p++) | |
687 | if (!seat_name_valid_char(*p)) | |
688 | return false; | |
689 | ||
1c9a2c10 LP |
690 | if (strlen(name) > 255) |
691 | return false; | |
692 | ||
3f49d45a LP |
693 | return true; |
694 | } |