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Commit | Line | Data |
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20263082 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2011 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
20263082 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
20263082 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
20263082 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
20263082 | 20 | #include <errno.h> |
20263082 | 21 | #include <fcntl.h> |
5eda94dd | 22 | #include <string.h> |
07630cea | 23 | #include <unistd.h> |
20263082 | 24 | |
cc377381 | 25 | #include "sd-messages.h" |
07630cea | 26 | |
b5efdb8a | 27 | #include "alloc-util.h" |
3ffd4af2 | 28 | #include "fd-util.h" |
0d39fa9c | 29 | #include "fileio.h" |
f97b34a6 | 30 | #include "format-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" |
d054f0a4 | 35 | #include "stdio-util.h" |
07630cea | 36 | #include "string-util.h" |
288a74cc | 37 | #include "terminal-util.h" |
07630cea | 38 | #include "util.h" |
20263082 LP |
39 | |
40 | Seat *seat_new(Manager *m, const char *id) { | |
41 | Seat *s; | |
42 | ||
43 | assert(m); | |
44 | assert(id); | |
45 | ||
46 | s = new0(Seat, 1); | |
47 | if (!s) | |
48 | return NULL; | |
49 | ||
98a28fef | 50 | s->state_file = strappend("/run/systemd/seats/", id); |
6b430fdb ZJS |
51 | if (!s->state_file) |
52 | return mfree(s); | |
20263082 | 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); |
6b430fdb | 59 | return mfree(s); |
20263082 LP |
60 | } |
61 | ||
20263082 LP |
62 | return s; |
63 | } | |
64 | ||
65 | void seat_free(Seat *s) { | |
66 | assert(s); | |
67 | ||
14c3baca | 68 | if (s->in_gc_queue) |
71fda00f | 69 | LIST_REMOVE(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca | 70 | |
20263082 LP |
71 | while (s->sessions) |
72 | session_free(s->sessions); | |
73 | ||
74 | assert(!s->active); | |
75 | ||
76 | while (s->devices) | |
77 | device_free(s->devices); | |
78 | ||
79 | hashmap_remove(s->manager->seats, s->id); | |
80 | ||
49e6fdbf | 81 | free(s->positions); |
d2f92cdf | 82 | free(s->state_file); |
20263082 LP |
83 | free(s); |
84 | } | |
85 | ||
86 | int seat_save(Seat *s) { | |
cc377381 LP |
87 | _cleanup_free_ char *temp_path = NULL; |
88 | _cleanup_fclose_ FILE *f = NULL; | |
20263082 LP |
89 | int r; |
90 | ||
91 | assert(s); | |
92 | ||
accaeded LP |
93 | if (!s->started) |
94 | return 0; | |
95 | ||
d2e54fae | 96 | r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0); |
20263082 | 97 | if (r < 0) |
dacd6cee | 98 | goto fail; |
14c3baca LP |
99 | |
100 | r = fopen_temporary(s->state_file, &f, &temp_path); | |
101 | if (r < 0) | |
dacd6cee | 102 | goto fail; |
20263082 | 103 | |
14c3baca | 104 | fchmod(fileno(f), 0644); |
20263082 LP |
105 | |
106 | fprintf(f, | |
14c3baca | 107 | "# This is private data. Do not parse.\n" |
92432fcc | 108 | "IS_SEAT0=%i\n" |
f1a8e221 LP |
109 | "CAN_MULTI_SESSION=%i\n" |
110 | "CAN_TTY=%i\n" | |
111 | "CAN_GRAPHICAL=%i\n", | |
92432fcc | 112 | seat_is_seat0(s), |
f1a8e221 LP |
113 | seat_can_multi_session(s), |
114 | seat_can_tty(s), | |
115 | seat_can_graphical(s)); | |
20263082 LP |
116 | |
117 | if (s->active) { | |
118 | assert(s->active->user); | |
119 | ||
120 | fprintf(f, | |
121 | "ACTIVE=%s\n" | |
a08ac7e0 | 122 | "ACTIVE_UID="UID_FMT"\n", |
20263082 | 123 | s->active->id, |
a08ac7e0 | 124 | s->active->user->uid); |
20263082 LP |
125 | } |
126 | ||
127 | if (s->sessions) { | |
128 | Session *i; | |
20263082 | 129 | |
4b61c875 | 130 | fputs_unlocked("SESSIONS=", f); |
20263082 | 131 | LIST_FOREACH(sessions_by_seat, i, s->sessions) { |
14c3baca LP |
132 | fprintf(f, |
133 | "%s%c", | |
134 | i->id, | |
135 | i->sessions_by_seat_next ? ' ' : '\n'); | |
136 | } | |
20263082 | 137 | |
4b61c875 | 138 | fputs_unlocked("UIDS=", f); |
fde78a3a | 139 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
20263082 | 140 | fprintf(f, |
90b2de37 ZJS |
141 | UID_FMT"%c", |
142 | i->user->uid, | |
14c3baca | 143 | i->sessions_by_seat_next ? ' ' : '\n'); |
20263082 LP |
144 | } |
145 | ||
dacd6cee LP |
146 | r = fflush_and_check(f); |
147 | if (r < 0) | |
148 | goto fail; | |
14c3baca | 149 | |
dacd6cee | 150 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 151 | r = -errno; |
dacd6cee | 152 | goto fail; |
20263082 LP |
153 | } |
154 | ||
dacd6cee LP |
155 | return 0; |
156 | ||
157 | fail: | |
158 | (void) unlink(s->state_file); | |
159 | ||
160 | if (temp_path) | |
161 | (void) unlink(temp_path); | |
14c3baca | 162 | |
dacd6cee | 163 | return log_error_errno(r, "Failed to save seat data %s: %m", s->state_file); |
20263082 LP |
164 | } |
165 | ||
166 | int seat_load(Seat *s) { | |
167 | assert(s); | |
168 | ||
a185c5aa LP |
169 | /* There isn't actually anything to read here ... */ |
170 | ||
20263082 LP |
171 | return 0; |
172 | } | |
173 | ||
92bd5ff3 | 174 | static int vt_allocate(unsigned int vtnr) { |
61376f96 | 175 | char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned int)]; |
cc377381 | 176 | _cleanup_close_ int fd = -1; |
20263082 LP |
177 | |
178 | assert(vtnr >= 1); | |
179 | ||
d054f0a4 | 180 | xsprintf(p, "/dev/tty%u", vtnr); |
20263082 | 181 | fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC); |
cc377381 LP |
182 | if (fd < 0) |
183 | return -errno; | |
20263082 | 184 | |
cc377381 | 185 | return 0; |
20263082 LP |
186 | } |
187 | ||
30ed21ce | 188 | int seat_preallocate_vts(Seat *s) { |
3f49d45a LP |
189 | int r = 0; |
190 | unsigned i; | |
20263082 LP |
191 | |
192 | assert(s); | |
193 | assert(s->manager); | |
194 | ||
30ed21ce LP |
195 | log_debug("Preallocating VTs..."); |
196 | ||
20263082 LP |
197 | if (s->manager->n_autovts <= 0) |
198 | return 0; | |
199 | ||
bf7825ae | 200 | if (!seat_has_vts(s)) |
20263082 LP |
201 | return 0; |
202 | ||
e7886786 | 203 | for (i = 1; i <= s->manager->n_autovts; i++) { |
20263082 LP |
204 | int q; |
205 | ||
206 | q = vt_allocate(i); | |
14c3baca | 207 | if (q < 0) { |
1fa2f38f | 208 | log_error_errno(q, "Failed to preallocate VT %u: %m", i); |
20263082 | 209 | r = q; |
14c3baca | 210 | } |
20263082 LP |
211 | } |
212 | ||
213 | return r; | |
214 | } | |
215 | ||
5eda94dd LP |
216 | int seat_apply_acls(Seat *s, Session *old_active) { |
217 | int r; | |
20263082 | 218 | |
5eda94dd | 219 | assert(s); |
20263082 | 220 | |
5eda94dd LP |
221 | r = devnode_acl_all(s->manager->udev, |
222 | s->id, | |
223 | false, | |
224 | !!old_active, old_active ? old_active->user->uid : 0, | |
225 | !!s->active, s->active ? s->active->user->uid : 0); | |
20263082 | 226 | |
5eda94dd | 227 | if (r < 0) |
da927ba9 | 228 | log_error_errno(r, "Failed to apply ACLs: %m"); |
20263082 LP |
229 | |
230 | return r; | |
231 | } | |
232 | ||
9418f147 LP |
233 | int seat_set_active(Seat *s, Session *session) { |
234 | Session *old_active; | |
235 | ||
236 | assert(s); | |
77527da0 | 237 | assert(!session || session->seat == s); |
9418f147 LP |
238 | |
239 | if (session == s->active) | |
240 | return 0; | |
241 | ||
242 | old_active = s->active; | |
243 | s->active = session; | |
244 | ||
dfd55270 | 245 | if (old_active) { |
118ecf32 | 246 | session_device_pause_all(old_active); |
cc377381 | 247 | session_send_changed(old_active, "Active", NULL); |
dfd55270 | 248 | } |
118ecf32 | 249 | |
9418f147 LP |
250 | seat_apply_acls(s, old_active); |
251 | ||
118ecf32 | 252 | if (session && session->started) { |
cc377381 | 253 | session_send_changed(session, "Active", NULL); |
118ecf32 DH |
254 | session_device_resume_all(session); |
255 | } | |
9418f147 LP |
256 | |
257 | if (!session || session->started) | |
cc377381 | 258 | seat_send_changed(s, "ActiveSession", NULL); |
9418f147 | 259 | |
98a28fef LP |
260 | seat_save(s); |
261 | ||
7f7bb946 | 262 | if (session) { |
98a28fef | 263 | session_save(session); |
7f7bb946 LP |
264 | user_save(session->user); |
265 | } | |
98a28fef | 266 | |
7f7bb946 | 267 | if (old_active) { |
98a28fef | 268 | session_save(old_active); |
78ab361c CG |
269 | if (!session || session->user != old_active->user) |
270 | user_save(old_active->user); | |
7f7bb946 | 271 | } |
98a28fef | 272 | |
9418f147 LP |
273 | return 0; |
274 | } | |
275 | ||
49e6fdbf DH |
276 | int seat_switch_to(Seat *s, unsigned int num) { |
277 | /* Public session positions skip 0 (there is only F1-F12). Maybe it | |
278 | * will get reassigned in the future, so return error for now. */ | |
55493982 | 279 | if (num == 0) |
49e6fdbf DH |
280 | return -EINVAL; |
281 | ||
15403427 DH |
282 | if (num >= s->position_count || !s->positions[num]) { |
283 | /* allow switching to unused VTs to trigger auto-activate */ | |
284 | if (seat_has_vts(s) && num < 64) | |
285 | return chvt(num); | |
286 | ||
49e6fdbf | 287 | return -EINVAL; |
15403427 | 288 | } |
49e6fdbf DH |
289 | |
290 | return session_activate(s->positions[num]); | |
291 | } | |
292 | ||
293 | int seat_switch_to_next(Seat *s) { | |
294 | unsigned int start, i; | |
295 | ||
55493982 | 296 | if (s->position_count == 0) |
49e6fdbf DH |
297 | return -EINVAL; |
298 | ||
299 | start = 1; | |
e6494a07 DH |
300 | if (s->active && s->active->position > 0) |
301 | start = s->active->position; | |
49e6fdbf DH |
302 | |
303 | for (i = start + 1; i < s->position_count; ++i) | |
304 | if (s->positions[i]) | |
305 | return session_activate(s->positions[i]); | |
306 | ||
307 | for (i = 1; i < start; ++i) | |
308 | if (s->positions[i]) | |
309 | return session_activate(s->positions[i]); | |
310 | ||
311 | return -EINVAL; | |
312 | } | |
313 | ||
314 | int seat_switch_to_previous(Seat *s) { | |
315 | unsigned int start, i; | |
316 | ||
55493982 | 317 | if (s->position_count == 0) |
49e6fdbf DH |
318 | return -EINVAL; |
319 | ||
320 | start = 1; | |
e6494a07 DH |
321 | if (s->active && s->active->position > 0) |
322 | start = s->active->position; | |
49e6fdbf DH |
323 | |
324 | for (i = start - 1; i > 0; --i) | |
325 | if (s->positions[i]) | |
326 | return session_activate(s->positions[i]); | |
327 | ||
328 | for (i = s->position_count - 1; i > start; --i) | |
329 | if (s->positions[i]) | |
330 | return session_activate(s->positions[i]); | |
331 | ||
332 | return -EINVAL; | |
333 | } | |
334 | ||
92bd5ff3 | 335 | int seat_active_vt_changed(Seat *s, unsigned int vtnr) { |
9418f147 LP |
336 | Session *i, *new_active = NULL; |
337 | int r; | |
20263082 LP |
338 | |
339 | assert(s); | |
340 | assert(vtnr >= 1); | |
20263082 | 341 | |
bf7825ae | 342 | if (!seat_has_vts(s)) |
14c3baca LP |
343 | return -EINVAL; |
344 | ||
92bd5ff3 | 345 | log_debug("VT changed to %u", vtnr); |
20263082 | 346 | |
be94d954 MP |
347 | /* we might have earlier closing sessions on the same VT, so try to |
348 | * find a running one first */ | |
20263082 | 349 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
be94d954 | 350 | if (i->vtnr == vtnr && !i->stopping) { |
14c3baca | 351 | new_active = i; |
20263082 LP |
352 | break; |
353 | } | |
354 | ||
be94d954 MP |
355 | if (!new_active) { |
356 | /* no running one? then we can't decide which one is the | |
357 | * active one, let the first one win */ | |
358 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
359 | if (i->vtnr == vtnr) { | |
360 | new_active = i; | |
361 | break; | |
362 | } | |
363 | } | |
364 | ||
9418f147 | 365 | r = seat_set_active(s, new_active); |
5eda94dd | 366 | manager_spawn_autovt(s->manager, vtnr); |
20263082 | 367 | |
9418f147 | 368 | return r; |
20263082 LP |
369 | } |
370 | ||
14c3baca LP |
371 | int seat_read_active_vt(Seat *s) { |
372 | char t[64]; | |
373 | ssize_t k; | |
92bd5ff3 DH |
374 | unsigned int vtnr; |
375 | int r; | |
14c3baca LP |
376 | |
377 | assert(s); | |
378 | ||
bf7825ae | 379 | if (!seat_has_vts(s)) |
14c3baca LP |
380 | return 0; |
381 | ||
e8f3e7a7 ZJS |
382 | if (lseek(s->manager->console_active_fd, SEEK_SET, 0) < 0) |
383 | return log_error_errno(errno, "lseek on console_active_fd failed: %m"); | |
14c3baca LP |
384 | |
385 | k = read(s->manager->console_active_fd, t, sizeof(t)-1); | |
386 | if (k <= 0) { | |
387 | log_error("Failed to read current console: %s", k < 0 ? strerror(-errno) : "EOF"); | |
388 | return k < 0 ? -errno : -EIO; | |
389 | } | |
390 | ||
391 | t[k] = 0; | |
392 | truncate_nl(t); | |
393 | ||
394 | if (!startswith(t, "tty")) { | |
395 | log_error("Hm, /sys/class/tty/tty0/active is badly formatted."); | |
396 | return -EIO; | |
397 | } | |
398 | ||
92bd5ff3 | 399 | r = safe_atou(t+3, &vtnr); |
e8f3e7a7 ZJS |
400 | if (r < 0) |
401 | return log_error_errno(r, "Failed to parse VT number \"%s\": %m", t+3); | |
14c3baca | 402 | |
92bd5ff3 | 403 | if (!vtnr) { |
14c3baca LP |
404 | log_error("VT number invalid: %s", t+3); |
405 | return -EIO; | |
406 | } | |
407 | ||
408 | return seat_active_vt_changed(s, vtnr); | |
409 | } | |
410 | ||
411 | int seat_start(Seat *s) { | |
412 | assert(s); | |
413 | ||
3f49d45a LP |
414 | if (s->started) |
415 | return 0; | |
416 | ||
877d54e9 | 417 | log_struct(LOG_INFO, |
2b044526 | 418 | "MESSAGE_ID=" SD_MESSAGE_SEAT_START_STR, |
877d54e9 | 419 | "SEAT_ID=%s", s->id, |
e2cc6eca | 420 | LOG_MESSAGE("New seat %s.", s->id), |
877d54e9 | 421 | NULL); |
3f49d45a | 422 | |
14c3baca LP |
423 | /* Initialize VT magic stuff */ |
424 | seat_preallocate_vts(s); | |
425 | ||
426 | /* Read current VT */ | |
427 | seat_read_active_vt(s); | |
428 | ||
7f7bb946 LP |
429 | s->started = true; |
430 | ||
14c3baca LP |
431 | /* Save seat data */ |
432 | seat_save(s); | |
433 | ||
da119395 LP |
434 | seat_send_signal(s, true); |
435 | ||
14c3baca LP |
436 | return 0; |
437 | } | |
438 | ||
9bb69af4 | 439 | int seat_stop(Seat *s, bool force) { |
a185c5aa | 440 | int r = 0; |
20263082 LP |
441 | |
442 | assert(s); | |
443 | ||
ed18b08b | 444 | if (s->started) |
877d54e9 | 445 | log_struct(LOG_INFO, |
2b044526 | 446 | "MESSAGE_ID=" SD_MESSAGE_SEAT_STOP_STR, |
877d54e9 | 447 | "SEAT_ID=%s", s->id, |
e2cc6eca | 448 | LOG_MESSAGE("Removed seat %s.", s->id), |
877d54e9 | 449 | NULL); |
da119395 | 450 | |
9bb69af4 | 451 | seat_stop_sessions(s, force); |
a185c5aa LP |
452 | |
453 | unlink(s->state_file); | |
454 | seat_add_to_gc_queue(s); | |
455 | ||
ed18b08b LP |
456 | if (s->started) |
457 | seat_send_signal(s, false); | |
458 | ||
a185c5aa LP |
459 | s->started = false; |
460 | ||
461 | return r; | |
462 | } | |
463 | ||
9bb69af4 | 464 | int seat_stop_sessions(Seat *s, bool force) { |
a185c5aa LP |
465 | Session *session; |
466 | int r = 0, k; | |
467 | ||
468 | assert(s); | |
469 | ||
20263082 | 470 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { |
9bb69af4 | 471 | k = session_stop(session, force); |
20263082 LP |
472 | if (k < 0) |
473 | r = k; | |
474 | } | |
475 | ||
a185c5aa LP |
476 | return r; |
477 | } | |
14c3baca | 478 | |
49e6fdbf | 479 | void seat_evict_position(Seat *s, Session *session) { |
3e6b205f | 480 | Session *iter; |
e6494a07 | 481 | unsigned int pos = session->position; |
49e6fdbf | 482 | |
e6494a07 | 483 | session->position = 0; |
49e6fdbf | 484 | |
55493982 | 485 | if (pos == 0) |
49e6fdbf DH |
486 | return; |
487 | ||
3e6b205f | 488 | if (pos < s->position_count && s->positions[pos] == session) { |
49e6fdbf | 489 | s->positions[pos] = NULL; |
3e6b205f DH |
490 | |
491 | /* There might be another session claiming the same | |
55493982 | 492 | * position (eg., during gdm->session transition), so let's look |
3e6b205f DH |
493 | * for it and set it on the free slot. */ |
494 | LIST_FOREACH(sessions_by_seat, iter, s->sessions) { | |
28103328 | 495 | if (iter->position == pos && session_get_state(iter) != SESSION_CLOSING) { |
3e6b205f DH |
496 | s->positions[pos] = iter; |
497 | break; | |
498 | } | |
499 | } | |
500 | } | |
49e6fdbf DH |
501 | } |
502 | ||
503 | void seat_claim_position(Seat *s, Session *session, unsigned int pos) { | |
504 | /* with VTs, the position is always the same as the VTnr */ | |
505 | if (seat_has_vts(s)) | |
506 | pos = session->vtnr; | |
507 | ||
ca2d3784 | 508 | if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1)) |
49e6fdbf DH |
509 | return; |
510 | ||
511 | seat_evict_position(s, session); | |
512 | ||
e6494a07 | 513 | session->position = pos; |
da770c38 | 514 | if (pos > 0) |
49e6fdbf DH |
515 | s->positions[pos] = session; |
516 | } | |
517 | ||
518 | static void seat_assign_position(Seat *s, Session *session) { | |
519 | unsigned int pos; | |
520 | ||
e6494a07 | 521 | if (session->position > 0) |
49e6fdbf DH |
522 | return; |
523 | ||
524 | for (pos = 1; pos < s->position_count; ++pos) | |
525 | if (!s->positions[pos]) | |
526 | break; | |
527 | ||
528 | seat_claim_position(s, session, pos); | |
529 | } | |
530 | ||
a185c5aa LP |
531 | int seat_attach_session(Seat *s, Session *session) { |
532 | assert(s); | |
533 | assert(session); | |
534 | assert(!session->seat); | |
3f49d45a | 535 | |
c506027a DH |
536 | if (!seat_has_vts(s) != !session->vtnr) |
537 | return -EINVAL; | |
538 | ||
a185c5aa | 539 | session->seat = s; |
71fda00f | 540 | LIST_PREPEND(sessions_by_seat, s->sessions, session); |
49e6fdbf | 541 | seat_assign_position(s, session); |
a185c5aa | 542 | |
bf7825ae | 543 | /* On seats with VTs, the VT logic defines which session is active. On |
3fdb2494 DH |
544 | * seats without VTs, we automatically activate new sessions. */ |
545 | if (!seat_has_vts(s)) | |
9418f147 | 546 | seat_set_active(s, session); |
9418f147 | 547 | |
a185c5aa LP |
548 | return 0; |
549 | } | |
550 | ||
d7bd01b5 DH |
551 | void seat_complete_switch(Seat *s) { |
552 | Session *session; | |
553 | ||
554 | assert(s); | |
555 | ||
556 | /* if no session-switch is pending or if it got canceled, do nothing */ | |
557 | if (!s->pending_switch) | |
558 | return; | |
559 | ||
560 | session = s->pending_switch; | |
561 | s->pending_switch = NULL; | |
562 | ||
563 | seat_set_active(s, session); | |
564 | } | |
565 | ||
bf7825ae DH |
566 | bool seat_has_vts(Seat *s) { |
567 | assert(s); | |
568 | ||
569 | return seat_is_seat0(s) && s->manager->console_active_fd >= 0; | |
570 | } | |
571 | ||
92432fcc | 572 | bool seat_is_seat0(Seat *s) { |
a185c5aa LP |
573 | assert(s); |
574 | ||
92432fcc | 575 | return s->manager->seat0 == s; |
a185c5aa LP |
576 | } |
577 | ||
addedec4 LP |
578 | bool seat_can_multi_session(Seat *s) { |
579 | assert(s); | |
580 | ||
bf7825ae | 581 | return seat_has_vts(s); |
addedec4 LP |
582 | } |
583 | ||
f1a8e221 LP |
584 | bool seat_can_tty(Seat *s) { |
585 | assert(s); | |
586 | ||
bf7825ae | 587 | return seat_has_vts(s); |
f1a8e221 LP |
588 | } |
589 | ||
718d006a DH |
590 | bool seat_has_master_device(Seat *s) { |
591 | assert(s); | |
592 | ||
593 | /* device list is ordered by "master" flag */ | |
594 | return !!s->devices && s->devices->master; | |
595 | } | |
596 | ||
f1a8e221 LP |
597 | bool seat_can_graphical(Seat *s) { |
598 | assert(s); | |
599 | ||
718d006a | 600 | return seat_has_master_device(s); |
f1a8e221 LP |
601 | } |
602 | ||
a185c5aa LP |
603 | int seat_get_idle_hint(Seat *s, dual_timestamp *t) { |
604 | Session *session; | |
605 | bool idle_hint = true; | |
5cb14b37 | 606 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
a185c5aa LP |
607 | |
608 | assert(s); | |
609 | ||
610 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { | |
611 | dual_timestamp k; | |
612 | int ih; | |
613 | ||
614 | ih = session_get_idle_hint(session, &k); | |
615 | if (ih < 0) | |
616 | return ih; | |
617 | ||
618 | if (!ih) { | |
619 | if (!idle_hint) { | |
4a271908 | 620 | if (k.monotonic > ts.monotonic) |
a185c5aa LP |
621 | ts = k; |
622 | } else { | |
623 | idle_hint = false; | |
624 | ts = k; | |
625 | } | |
626 | } else if (idle_hint) { | |
627 | ||
628 | if (k.monotonic > ts.monotonic) | |
629 | ts = k; | |
630 | } | |
631 | } | |
632 | ||
633 | if (t) | |
634 | *t = ts; | |
635 | ||
636 | return idle_hint; | |
20263082 | 637 | } |
14c3baca | 638 | |
cc377381 | 639 | bool seat_check_gc(Seat *s, bool drop_not_started) { |
14c3baca LP |
640 | assert(s); |
641 | ||
4a4b033f | 642 | if (drop_not_started && !s->started) |
cc377381 | 643 | return false; |
932e3ee7 | 644 | |
92432fcc | 645 | if (seat_is_seat0(s)) |
cc377381 | 646 | return true; |
14c3baca | 647 | |
718d006a | 648 | return seat_has_master_device(s); |
14c3baca LP |
649 | } |
650 | ||
651 | void seat_add_to_gc_queue(Seat *s) { | |
652 | assert(s); | |
653 | ||
654 | if (s->in_gc_queue) | |
655 | return; | |
656 | ||
71fda00f | 657 | LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca LP |
658 | s->in_gc_queue = true; |
659 | } | |
3f49d45a LP |
660 | |
661 | static bool seat_name_valid_char(char c) { | |
662 | return | |
663 | (c >= 'a' && c <= 'z') || | |
664 | (c >= 'A' && c <= 'Z') || | |
665 | (c >= '0' && c <= '9') || | |
666 | c == '-' || | |
667 | c == '_'; | |
668 | } | |
669 | ||
670 | bool seat_name_is_valid(const char *name) { | |
671 | const char *p; | |
672 | ||
673 | assert(name); | |
674 | ||
675 | if (!startswith(name, "seat")) | |
676 | return false; | |
677 | ||
678 | if (!name[4]) | |
679 | return false; | |
680 | ||
681 | for (p = name; *p; p++) | |
682 | if (!seat_name_valid_char(*p)) | |
683 | return false; | |
684 | ||
1c9a2c10 LP |
685 | if (strlen(name) > 255) |
686 | return false; | |
687 | ||
3f49d45a LP |
688 | return true; |
689 | } |