]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
20263082 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2011 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
8 | under the terms of the GNU Lesser General Public License as published by |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
20263082 LP |
10 | (at your option) any later version. |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 15 | Lesser General Public License for more details. |
20263082 | 16 | |
5430f7f2 | 17 | You should have received a copy of the GNU Lesser General Public License |
20263082 LP |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
19 | ***/ | |
20 | ||
20263082 | 21 | #include <errno.h> |
20263082 | 22 | #include <fcntl.h> |
0d536673 | 23 | #include <stdio_ext.h> |
5eda94dd | 24 | #include <string.h> |
07630cea | 25 | #include <unistd.h> |
20263082 | 26 | |
cc377381 | 27 | #include "sd-messages.h" |
07630cea | 28 | |
b5efdb8a | 29 | #include "alloc-util.h" |
3ffd4af2 | 30 | #include "fd-util.h" |
0d39fa9c | 31 | #include "fileio.h" |
f97b34a6 | 32 | #include "format-util.h" |
5eda94dd | 33 | #include "logind-acl.h" |
3ffd4af2 | 34 | #include "logind-seat.h" |
49e942b2 | 35 | #include "mkdir.h" |
6bedfcbb | 36 | #include "parse-util.h" |
d054f0a4 | 37 | #include "stdio-util.h" |
07630cea | 38 | #include "string-util.h" |
288a74cc | 39 | #include "terminal-util.h" |
07630cea | 40 | #include "util.h" |
20263082 LP |
41 | |
42 | Seat *seat_new(Manager *m, const char *id) { | |
43 | Seat *s; | |
44 | ||
45 | assert(m); | |
46 | assert(id); | |
47 | ||
48 | s = new0(Seat, 1); | |
49 | if (!s) | |
50 | return NULL; | |
51 | ||
98a28fef | 52 | s->state_file = strappend("/run/systemd/seats/", id); |
6b430fdb ZJS |
53 | if (!s->state_file) |
54 | return mfree(s); | |
20263082 | 55 | |
2b6bf07d | 56 | s->id = basename(s->state_file); |
14c3baca | 57 | s->manager = m; |
20263082 LP |
58 | |
59 | if (hashmap_put(m->seats, s->id, s) < 0) { | |
14c3baca | 60 | free(s->state_file); |
6b430fdb | 61 | return mfree(s); |
20263082 LP |
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 | ||
c31ad024 | 98 | r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0, false); |
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 | |
0d536673 LP |
106 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
107 | (void) fchmod(fileno(f), 0644); | |
20263082 LP |
108 | |
109 | fprintf(f, | |
14c3baca | 110 | "# This is private data. Do not parse.\n" |
92432fcc | 111 | "IS_SEAT0=%i\n" |
f1a8e221 LP |
112 | "CAN_MULTI_SESSION=%i\n" |
113 | "CAN_TTY=%i\n" | |
114 | "CAN_GRAPHICAL=%i\n", | |
92432fcc | 115 | seat_is_seat0(s), |
f1a8e221 LP |
116 | seat_can_multi_session(s), |
117 | seat_can_tty(s), | |
118 | seat_can_graphical(s)); | |
20263082 LP |
119 | |
120 | if (s->active) { | |
121 | assert(s->active->user); | |
122 | ||
123 | fprintf(f, | |
124 | "ACTIVE=%s\n" | |
a08ac7e0 | 125 | "ACTIVE_UID="UID_FMT"\n", |
20263082 | 126 | s->active->id, |
a08ac7e0 | 127 | s->active->user->uid); |
20263082 LP |
128 | } |
129 | ||
130 | if (s->sessions) { | |
131 | Session *i; | |
20263082 | 132 | |
0d536673 | 133 | fputs("SESSIONS=", f); |
20263082 | 134 | LIST_FOREACH(sessions_by_seat, i, s->sessions) { |
14c3baca LP |
135 | fprintf(f, |
136 | "%s%c", | |
137 | i->id, | |
138 | i->sessions_by_seat_next ? ' ' : '\n'); | |
139 | } | |
20263082 | 140 | |
0d536673 | 141 | fputs("UIDS=", f); |
fde78a3a | 142 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
20263082 | 143 | fprintf(f, |
90b2de37 ZJS |
144 | UID_FMT"%c", |
145 | i->user->uid, | |
14c3baca | 146 | i->sessions_by_seat_next ? ' ' : '\n'); |
20263082 LP |
147 | } |
148 | ||
dacd6cee LP |
149 | r = fflush_and_check(f); |
150 | if (r < 0) | |
151 | goto fail; | |
14c3baca | 152 | |
dacd6cee | 153 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 154 | r = -errno; |
dacd6cee | 155 | goto fail; |
20263082 LP |
156 | } |
157 | ||
dacd6cee LP |
158 | return 0; |
159 | ||
160 | fail: | |
161 | (void) unlink(s->state_file); | |
162 | ||
163 | if (temp_path) | |
164 | (void) unlink(temp_path); | |
14c3baca | 165 | |
dacd6cee | 166 | return log_error_errno(r, "Failed to save seat data %s: %m", s->state_file); |
20263082 LP |
167 | } |
168 | ||
169 | int seat_load(Seat *s) { | |
170 | assert(s); | |
171 | ||
a185c5aa LP |
172 | /* There isn't actually anything to read here ... */ |
173 | ||
20263082 LP |
174 | return 0; |
175 | } | |
176 | ||
92bd5ff3 | 177 | static int vt_allocate(unsigned int vtnr) { |
61376f96 | 178 | char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned int)]; |
cc377381 | 179 | _cleanup_close_ int fd = -1; |
20263082 LP |
180 | |
181 | assert(vtnr >= 1); | |
182 | ||
d054f0a4 | 183 | xsprintf(p, "/dev/tty%u", vtnr); |
20263082 | 184 | fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC); |
cc377381 LP |
185 | if (fd < 0) |
186 | return -errno; | |
20263082 | 187 | |
cc377381 | 188 | return 0; |
20263082 LP |
189 | } |
190 | ||
30ed21ce | 191 | int seat_preallocate_vts(Seat *s) { |
3f49d45a LP |
192 | int r = 0; |
193 | unsigned i; | |
20263082 LP |
194 | |
195 | assert(s); | |
196 | assert(s->manager); | |
197 | ||
30ed21ce LP |
198 | log_debug("Preallocating VTs..."); |
199 | ||
20263082 LP |
200 | if (s->manager->n_autovts <= 0) |
201 | return 0; | |
202 | ||
bf7825ae | 203 | if (!seat_has_vts(s)) |
20263082 LP |
204 | return 0; |
205 | ||
e7886786 | 206 | for (i = 1; i <= s->manager->n_autovts; i++) { |
20263082 LP |
207 | int q; |
208 | ||
209 | q = vt_allocate(i); | |
14c3baca | 210 | if (q < 0) { |
1fa2f38f | 211 | log_error_errno(q, "Failed to preallocate VT %u: %m", i); |
20263082 | 212 | r = q; |
14c3baca | 213 | } |
20263082 LP |
214 | } |
215 | ||
216 | return r; | |
217 | } | |
218 | ||
5eda94dd LP |
219 | int seat_apply_acls(Seat *s, Session *old_active) { |
220 | int r; | |
20263082 | 221 | |
5eda94dd | 222 | assert(s); |
20263082 | 223 | |
5eda94dd LP |
224 | r = devnode_acl_all(s->manager->udev, |
225 | s->id, | |
226 | false, | |
227 | !!old_active, old_active ? old_active->user->uid : 0, | |
228 | !!s->active, s->active ? s->active->user->uid : 0); | |
20263082 | 229 | |
5eda94dd | 230 | if (r < 0) |
da927ba9 | 231 | log_error_errno(r, "Failed to apply ACLs: %m"); |
20263082 LP |
232 | |
233 | return r; | |
234 | } | |
235 | ||
9418f147 LP |
236 | int seat_set_active(Seat *s, Session *session) { |
237 | Session *old_active; | |
238 | ||
239 | assert(s); | |
77527da0 | 240 | assert(!session || session->seat == s); |
9418f147 LP |
241 | |
242 | if (session == s->active) | |
243 | return 0; | |
244 | ||
245 | old_active = s->active; | |
246 | s->active = session; | |
247 | ||
dfd55270 | 248 | if (old_active) { |
118ecf32 | 249 | session_device_pause_all(old_active); |
cc377381 | 250 | session_send_changed(old_active, "Active", NULL); |
dfd55270 | 251 | } |
118ecf32 | 252 | |
9418f147 LP |
253 | seat_apply_acls(s, old_active); |
254 | ||
118ecf32 | 255 | if (session && session->started) { |
cc377381 | 256 | session_send_changed(session, "Active", NULL); |
118ecf32 DH |
257 | session_device_resume_all(session); |
258 | } | |
9418f147 LP |
259 | |
260 | if (!session || session->started) | |
cc377381 | 261 | seat_send_changed(s, "ActiveSession", NULL); |
9418f147 | 262 | |
98a28fef LP |
263 | seat_save(s); |
264 | ||
7f7bb946 | 265 | if (session) { |
98a28fef | 266 | session_save(session); |
7f7bb946 LP |
267 | user_save(session->user); |
268 | } | |
98a28fef | 269 | |
7f7bb946 | 270 | if (old_active) { |
98a28fef | 271 | session_save(old_active); |
78ab361c CG |
272 | if (!session || session->user != old_active->user) |
273 | user_save(old_active->user); | |
7f7bb946 | 274 | } |
98a28fef | 275 | |
9418f147 LP |
276 | return 0; |
277 | } | |
278 | ||
49e6fdbf DH |
279 | int seat_switch_to(Seat *s, unsigned int num) { |
280 | /* Public session positions skip 0 (there is only F1-F12). Maybe it | |
281 | * will get reassigned in the future, so return error for now. */ | |
55493982 | 282 | if (num == 0) |
49e6fdbf DH |
283 | return -EINVAL; |
284 | ||
15403427 DH |
285 | if (num >= s->position_count || !s->positions[num]) { |
286 | /* allow switching to unused VTs to trigger auto-activate */ | |
287 | if (seat_has_vts(s) && num < 64) | |
288 | return chvt(num); | |
289 | ||
49e6fdbf | 290 | return -EINVAL; |
15403427 | 291 | } |
49e6fdbf DH |
292 | |
293 | return session_activate(s->positions[num]); | |
294 | } | |
295 | ||
296 | int seat_switch_to_next(Seat *s) { | |
297 | unsigned int start, i; | |
298 | ||
55493982 | 299 | if (s->position_count == 0) |
49e6fdbf DH |
300 | return -EINVAL; |
301 | ||
302 | start = 1; | |
e6494a07 DH |
303 | if (s->active && s->active->position > 0) |
304 | start = s->active->position; | |
49e6fdbf DH |
305 | |
306 | for (i = start + 1; i < s->position_count; ++i) | |
307 | if (s->positions[i]) | |
308 | return session_activate(s->positions[i]); | |
309 | ||
310 | for (i = 1; i < start; ++i) | |
311 | if (s->positions[i]) | |
312 | return session_activate(s->positions[i]); | |
313 | ||
314 | return -EINVAL; | |
315 | } | |
316 | ||
317 | int seat_switch_to_previous(Seat *s) { | |
318 | unsigned int start, i; | |
319 | ||
55493982 | 320 | if (s->position_count == 0) |
49e6fdbf DH |
321 | return -EINVAL; |
322 | ||
323 | start = 1; | |
e6494a07 DH |
324 | if (s->active && s->active->position > 0) |
325 | start = s->active->position; | |
49e6fdbf DH |
326 | |
327 | for (i = start - 1; i > 0; --i) | |
328 | if (s->positions[i]) | |
329 | return session_activate(s->positions[i]); | |
330 | ||
331 | for (i = s->position_count - 1; i > start; --i) | |
332 | if (s->positions[i]) | |
333 | return session_activate(s->positions[i]); | |
334 | ||
335 | return -EINVAL; | |
336 | } | |
337 | ||
92bd5ff3 | 338 | int seat_active_vt_changed(Seat *s, unsigned int vtnr) { |
9418f147 LP |
339 | Session *i, *new_active = NULL; |
340 | int r; | |
20263082 LP |
341 | |
342 | assert(s); | |
343 | assert(vtnr >= 1); | |
20263082 | 344 | |
bf7825ae | 345 | if (!seat_has_vts(s)) |
14c3baca LP |
346 | return -EINVAL; |
347 | ||
92bd5ff3 | 348 | log_debug("VT changed to %u", vtnr); |
20263082 | 349 | |
be94d954 MP |
350 | /* we might have earlier closing sessions on the same VT, so try to |
351 | * find a running one first */ | |
20263082 | 352 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
be94d954 | 353 | if (i->vtnr == vtnr && !i->stopping) { |
14c3baca | 354 | new_active = i; |
20263082 LP |
355 | break; |
356 | } | |
357 | ||
be94d954 MP |
358 | if (!new_active) { |
359 | /* no running one? then we can't decide which one is the | |
360 | * active one, let the first one win */ | |
361 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
362 | if (i->vtnr == vtnr) { | |
363 | new_active = i; | |
364 | break; | |
365 | } | |
366 | } | |
367 | ||
9418f147 | 368 | r = seat_set_active(s, new_active); |
5eda94dd | 369 | manager_spawn_autovt(s->manager, vtnr); |
20263082 | 370 | |
9418f147 | 371 | return r; |
20263082 LP |
372 | } |
373 | ||
14c3baca LP |
374 | int seat_read_active_vt(Seat *s) { |
375 | char t[64]; | |
376 | ssize_t k; | |
92bd5ff3 DH |
377 | unsigned int vtnr; |
378 | int r; | |
14c3baca LP |
379 | |
380 | assert(s); | |
381 | ||
bf7825ae | 382 | if (!seat_has_vts(s)) |
14c3baca LP |
383 | return 0; |
384 | ||
e8f3e7a7 ZJS |
385 | if (lseek(s->manager->console_active_fd, SEEK_SET, 0) < 0) |
386 | return log_error_errno(errno, "lseek on console_active_fd failed: %m"); | |
14c3baca LP |
387 | |
388 | k = read(s->manager->console_active_fd, t, sizeof(t)-1); | |
389 | if (k <= 0) { | |
390 | log_error("Failed to read current console: %s", k < 0 ? strerror(-errno) : "EOF"); | |
391 | return k < 0 ? -errno : -EIO; | |
392 | } | |
393 | ||
394 | t[k] = 0; | |
395 | truncate_nl(t); | |
396 | ||
397 | if (!startswith(t, "tty")) { | |
398 | log_error("Hm, /sys/class/tty/tty0/active is badly formatted."); | |
399 | return -EIO; | |
400 | } | |
401 | ||
92bd5ff3 | 402 | r = safe_atou(t+3, &vtnr); |
e8f3e7a7 ZJS |
403 | if (r < 0) |
404 | return log_error_errno(r, "Failed to parse VT number \"%s\": %m", t+3); | |
14c3baca | 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, |
2b044526 | 421 | "MESSAGE_ID=" SD_MESSAGE_SEAT_START_STR, |
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, |
2b044526 | 449 | "MESSAGE_ID=" SD_MESSAGE_SEAT_STOP_STR, |
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 | |
bf7825ae | 546 | /* On seats with VTs, the VT logic defines which session is active. On |
3fdb2494 DH |
547 | * seats without VTs, we automatically activate new sessions. */ |
548 | if (!seat_has_vts(s)) | |
9418f147 | 549 | seat_set_active(s, session); |
9418f147 | 550 | |
a185c5aa LP |
551 | return 0; |
552 | } | |
553 | ||
d7bd01b5 DH |
554 | void seat_complete_switch(Seat *s) { |
555 | Session *session; | |
556 | ||
557 | assert(s); | |
558 | ||
559 | /* if no session-switch is pending or if it got canceled, do nothing */ | |
560 | if (!s->pending_switch) | |
561 | return; | |
562 | ||
563 | session = s->pending_switch; | |
564 | s->pending_switch = NULL; | |
565 | ||
566 | seat_set_active(s, session); | |
567 | } | |
568 | ||
bf7825ae DH |
569 | bool seat_has_vts(Seat *s) { |
570 | assert(s); | |
571 | ||
572 | return seat_is_seat0(s) && s->manager->console_active_fd >= 0; | |
573 | } | |
574 | ||
92432fcc | 575 | bool seat_is_seat0(Seat *s) { |
a185c5aa LP |
576 | assert(s); |
577 | ||
92432fcc | 578 | return s->manager->seat0 == s; |
a185c5aa LP |
579 | } |
580 | ||
addedec4 LP |
581 | bool seat_can_multi_session(Seat *s) { |
582 | assert(s); | |
583 | ||
bf7825ae | 584 | return seat_has_vts(s); |
addedec4 LP |
585 | } |
586 | ||
f1a8e221 LP |
587 | bool seat_can_tty(Seat *s) { |
588 | assert(s); | |
589 | ||
bf7825ae | 590 | return seat_has_vts(s); |
f1a8e221 LP |
591 | } |
592 | ||
718d006a DH |
593 | bool seat_has_master_device(Seat *s) { |
594 | assert(s); | |
595 | ||
596 | /* device list is ordered by "master" flag */ | |
597 | return !!s->devices && s->devices->master; | |
598 | } | |
599 | ||
f1a8e221 LP |
600 | bool seat_can_graphical(Seat *s) { |
601 | assert(s); | |
602 | ||
718d006a | 603 | return seat_has_master_device(s); |
f1a8e221 LP |
604 | } |
605 | ||
a185c5aa LP |
606 | int seat_get_idle_hint(Seat *s, dual_timestamp *t) { |
607 | Session *session; | |
608 | bool idle_hint = true; | |
5cb14b37 | 609 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
a185c5aa LP |
610 | |
611 | assert(s); | |
612 | ||
613 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { | |
614 | dual_timestamp k; | |
615 | int ih; | |
616 | ||
617 | ih = session_get_idle_hint(session, &k); | |
618 | if (ih < 0) | |
619 | return ih; | |
620 | ||
621 | if (!ih) { | |
622 | if (!idle_hint) { | |
4a271908 | 623 | if (k.monotonic > ts.monotonic) |
a185c5aa LP |
624 | ts = k; |
625 | } else { | |
626 | idle_hint = false; | |
627 | ts = k; | |
628 | } | |
629 | } else if (idle_hint) { | |
630 | ||
631 | if (k.monotonic > ts.monotonic) | |
632 | ts = k; | |
633 | } | |
634 | } | |
635 | ||
636 | if (t) | |
637 | *t = ts; | |
638 | ||
639 | return idle_hint; | |
20263082 | 640 | } |
14c3baca | 641 | |
cc377381 | 642 | bool seat_check_gc(Seat *s, bool drop_not_started) { |
14c3baca LP |
643 | assert(s); |
644 | ||
4a4b033f | 645 | if (drop_not_started && !s->started) |
cc377381 | 646 | return false; |
932e3ee7 | 647 | |
92432fcc | 648 | if (seat_is_seat0(s)) |
cc377381 | 649 | return true; |
14c3baca | 650 | |
718d006a | 651 | return seat_has_master_device(s); |
14c3baca LP |
652 | } |
653 | ||
654 | void seat_add_to_gc_queue(Seat *s) { | |
655 | assert(s); | |
656 | ||
657 | if (s->in_gc_queue) | |
658 | return; | |
659 | ||
71fda00f | 660 | LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca LP |
661 | s->in_gc_queue = true; |
662 | } | |
3f49d45a LP |
663 | |
664 | static bool seat_name_valid_char(char c) { | |
665 | return | |
666 | (c >= 'a' && c <= 'z') || | |
667 | (c >= 'A' && c <= 'Z') || | |
668 | (c >= '0' && c <= '9') || | |
4c701096 | 669 | IN_SET(c, '-', '_'); |
3f49d45a LP |
670 | } |
671 | ||
672 | bool seat_name_is_valid(const char *name) { | |
673 | const char *p; | |
674 | ||
675 | assert(name); | |
676 | ||
677 | if (!startswith(name, "seat")) | |
678 | return false; | |
679 | ||
680 | if (!name[4]) | |
681 | return false; | |
682 | ||
683 | for (p = name; *p; p++) | |
684 | if (!seat_name_valid_char(*p)) | |
685 | return false; | |
686 | ||
1c9a2c10 LP |
687 | if (strlen(name) > 255) |
688 | return false; | |
689 | ||
3f49d45a LP |
690 | return true; |
691 | } |