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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
20263082 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2011 Lennart Poettering | |
20263082 LP |
6 | ***/ |
7 | ||
20263082 | 8 | #include <errno.h> |
20263082 | 9 | #include <fcntl.h> |
0d536673 | 10 | #include <stdio_ext.h> |
5eda94dd | 11 | #include <string.h> |
07630cea | 12 | #include <unistd.h> |
20263082 | 13 | |
cc377381 | 14 | #include "sd-messages.h" |
07630cea | 15 | |
b5efdb8a | 16 | #include "alloc-util.h" |
3ffd4af2 | 17 | #include "fd-util.h" |
0d39fa9c | 18 | #include "fileio.h" |
f97b34a6 | 19 | #include "format-util.h" |
5eda94dd | 20 | #include "logind-acl.h" |
3ffd4af2 | 21 | #include "logind-seat.h" |
49e942b2 | 22 | #include "mkdir.h" |
6bedfcbb | 23 | #include "parse-util.h" |
d054f0a4 | 24 | #include "stdio-util.h" |
07630cea | 25 | #include "string-util.h" |
288a74cc | 26 | #include "terminal-util.h" |
07630cea | 27 | #include "util.h" |
20263082 LP |
28 | |
29 | Seat *seat_new(Manager *m, const char *id) { | |
30 | Seat *s; | |
31 | ||
32 | assert(m); | |
33 | assert(id); | |
34 | ||
35 | s = new0(Seat, 1); | |
36 | if (!s) | |
37 | return NULL; | |
38 | ||
98a28fef | 39 | s->state_file = strappend("/run/systemd/seats/", id); |
6b430fdb ZJS |
40 | if (!s->state_file) |
41 | return mfree(s); | |
20263082 | 42 | |
2b6bf07d | 43 | s->id = basename(s->state_file); |
14c3baca | 44 | s->manager = m; |
20263082 LP |
45 | |
46 | if (hashmap_put(m->seats, s->id, s) < 0) { | |
14c3baca | 47 | free(s->state_file); |
6b430fdb | 48 | return mfree(s); |
20263082 LP |
49 | } |
50 | ||
20263082 LP |
51 | return s; |
52 | } | |
53 | ||
54 | void seat_free(Seat *s) { | |
55 | assert(s); | |
56 | ||
14c3baca | 57 | if (s->in_gc_queue) |
71fda00f | 58 | LIST_REMOVE(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca | 59 | |
20263082 LP |
60 | while (s->sessions) |
61 | session_free(s->sessions); | |
62 | ||
63 | assert(!s->active); | |
64 | ||
65 | while (s->devices) | |
66 | device_free(s->devices); | |
67 | ||
68 | hashmap_remove(s->manager->seats, s->id); | |
69 | ||
49e6fdbf | 70 | free(s->positions); |
d2f92cdf | 71 | free(s->state_file); |
20263082 LP |
72 | free(s); |
73 | } | |
74 | ||
75 | int seat_save(Seat *s) { | |
cc377381 LP |
76 | _cleanup_free_ char *temp_path = NULL; |
77 | _cleanup_fclose_ FILE *f = NULL; | |
20263082 LP |
78 | int r; |
79 | ||
80 | assert(s); | |
81 | ||
accaeded LP |
82 | if (!s->started) |
83 | return 0; | |
84 | ||
37c1d5e9 | 85 | r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0, MKDIR_WARN_MODE); |
20263082 | 86 | if (r < 0) |
dacd6cee | 87 | goto fail; |
14c3baca LP |
88 | |
89 | r = fopen_temporary(s->state_file, &f, &temp_path); | |
90 | if (r < 0) | |
dacd6cee | 91 | goto fail; |
20263082 | 92 | |
0d536673 LP |
93 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
94 | (void) fchmod(fileno(f), 0644); | |
20263082 LP |
95 | |
96 | fprintf(f, | |
14c3baca | 97 | "# This is private data. Do not parse.\n" |
92432fcc | 98 | "IS_SEAT0=%i\n" |
f1a8e221 LP |
99 | "CAN_MULTI_SESSION=%i\n" |
100 | "CAN_TTY=%i\n" | |
101 | "CAN_GRAPHICAL=%i\n", | |
92432fcc | 102 | seat_is_seat0(s), |
f1a8e221 LP |
103 | seat_can_multi_session(s), |
104 | seat_can_tty(s), | |
105 | seat_can_graphical(s)); | |
20263082 LP |
106 | |
107 | if (s->active) { | |
108 | assert(s->active->user); | |
109 | ||
110 | fprintf(f, | |
111 | "ACTIVE=%s\n" | |
a08ac7e0 | 112 | "ACTIVE_UID="UID_FMT"\n", |
20263082 | 113 | s->active->id, |
a08ac7e0 | 114 | s->active->user->uid); |
20263082 LP |
115 | } |
116 | ||
117 | if (s->sessions) { | |
118 | Session *i; | |
20263082 | 119 | |
0d536673 | 120 | fputs("SESSIONS=", f); |
20263082 | 121 | LIST_FOREACH(sessions_by_seat, i, s->sessions) { |
14c3baca LP |
122 | fprintf(f, |
123 | "%s%c", | |
124 | i->id, | |
125 | i->sessions_by_seat_next ? ' ' : '\n'); | |
126 | } | |
20263082 | 127 | |
0d536673 | 128 | fputs("UIDS=", f); |
fde78a3a | 129 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
20263082 | 130 | fprintf(f, |
90b2de37 ZJS |
131 | UID_FMT"%c", |
132 | i->user->uid, | |
14c3baca | 133 | i->sessions_by_seat_next ? ' ' : '\n'); |
20263082 LP |
134 | } |
135 | ||
dacd6cee LP |
136 | r = fflush_and_check(f); |
137 | if (r < 0) | |
138 | goto fail; | |
14c3baca | 139 | |
dacd6cee | 140 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 141 | r = -errno; |
dacd6cee | 142 | goto fail; |
20263082 LP |
143 | } |
144 | ||
dacd6cee LP |
145 | return 0; |
146 | ||
147 | fail: | |
148 | (void) unlink(s->state_file); | |
149 | ||
150 | if (temp_path) | |
151 | (void) unlink(temp_path); | |
14c3baca | 152 | |
dacd6cee | 153 | return log_error_errno(r, "Failed to save seat data %s: %m", s->state_file); |
20263082 LP |
154 | } |
155 | ||
156 | int seat_load(Seat *s) { | |
157 | assert(s); | |
158 | ||
a185c5aa LP |
159 | /* There isn't actually anything to read here ... */ |
160 | ||
20263082 LP |
161 | return 0; |
162 | } | |
163 | ||
92bd5ff3 | 164 | static int vt_allocate(unsigned int vtnr) { |
61376f96 | 165 | char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned int)]; |
cc377381 | 166 | _cleanup_close_ int fd = -1; |
20263082 LP |
167 | |
168 | assert(vtnr >= 1); | |
169 | ||
d054f0a4 | 170 | xsprintf(p, "/dev/tty%u", vtnr); |
20263082 | 171 | fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC); |
cc377381 LP |
172 | if (fd < 0) |
173 | return -errno; | |
20263082 | 174 | |
cc377381 | 175 | return 0; |
20263082 LP |
176 | } |
177 | ||
30ed21ce | 178 | int seat_preallocate_vts(Seat *s) { |
3f49d45a LP |
179 | int r = 0; |
180 | unsigned i; | |
20263082 LP |
181 | |
182 | assert(s); | |
183 | assert(s->manager); | |
184 | ||
30ed21ce LP |
185 | log_debug("Preallocating VTs..."); |
186 | ||
20263082 LP |
187 | if (s->manager->n_autovts <= 0) |
188 | return 0; | |
189 | ||
bf7825ae | 190 | if (!seat_has_vts(s)) |
20263082 LP |
191 | return 0; |
192 | ||
e7886786 | 193 | for (i = 1; i <= s->manager->n_autovts; i++) { |
20263082 LP |
194 | int q; |
195 | ||
196 | q = vt_allocate(i); | |
14c3baca | 197 | if (q < 0) { |
1fa2f38f | 198 | log_error_errno(q, "Failed to preallocate VT %u: %m", i); |
20263082 | 199 | r = q; |
14c3baca | 200 | } |
20263082 LP |
201 | } |
202 | ||
203 | return r; | |
204 | } | |
205 | ||
5eda94dd LP |
206 | int seat_apply_acls(Seat *s, Session *old_active) { |
207 | int r; | |
20263082 | 208 | |
5eda94dd | 209 | assert(s); |
20263082 | 210 | |
5eda94dd LP |
211 | r = devnode_acl_all(s->manager->udev, |
212 | s->id, | |
213 | false, | |
214 | !!old_active, old_active ? old_active->user->uid : 0, | |
215 | !!s->active, s->active ? s->active->user->uid : 0); | |
20263082 | 216 | |
5eda94dd | 217 | if (r < 0) |
da927ba9 | 218 | log_error_errno(r, "Failed to apply ACLs: %m"); |
20263082 LP |
219 | |
220 | return r; | |
221 | } | |
222 | ||
9418f147 LP |
223 | int seat_set_active(Seat *s, Session *session) { |
224 | Session *old_active; | |
225 | ||
226 | assert(s); | |
77527da0 | 227 | assert(!session || session->seat == s); |
9418f147 LP |
228 | |
229 | if (session == s->active) | |
230 | return 0; | |
231 | ||
232 | old_active = s->active; | |
233 | s->active = session; | |
234 | ||
dfd55270 | 235 | if (old_active) { |
118ecf32 | 236 | session_device_pause_all(old_active); |
cc377381 | 237 | session_send_changed(old_active, "Active", NULL); |
dfd55270 | 238 | } |
118ecf32 | 239 | |
9418f147 LP |
240 | seat_apply_acls(s, old_active); |
241 | ||
118ecf32 | 242 | if (session && session->started) { |
cc377381 | 243 | session_send_changed(session, "Active", NULL); |
118ecf32 DH |
244 | session_device_resume_all(session); |
245 | } | |
9418f147 LP |
246 | |
247 | if (!session || session->started) | |
cc377381 | 248 | seat_send_changed(s, "ActiveSession", NULL); |
9418f147 | 249 | |
98a28fef LP |
250 | seat_save(s); |
251 | ||
7f7bb946 | 252 | if (session) { |
98a28fef | 253 | session_save(session); |
7f7bb946 LP |
254 | user_save(session->user); |
255 | } | |
98a28fef | 256 | |
7f7bb946 | 257 | if (old_active) { |
98a28fef | 258 | session_save(old_active); |
78ab361c CG |
259 | if (!session || session->user != old_active->user) |
260 | user_save(old_active->user); | |
7f7bb946 | 261 | } |
98a28fef | 262 | |
9418f147 LP |
263 | return 0; |
264 | } | |
265 | ||
49e6fdbf DH |
266 | int seat_switch_to(Seat *s, unsigned int num) { |
267 | /* Public session positions skip 0 (there is only F1-F12). Maybe it | |
268 | * will get reassigned in the future, so return error for now. */ | |
55493982 | 269 | if (num == 0) |
49e6fdbf DH |
270 | return -EINVAL; |
271 | ||
15403427 DH |
272 | if (num >= s->position_count || !s->positions[num]) { |
273 | /* allow switching to unused VTs to trigger auto-activate */ | |
274 | if (seat_has_vts(s) && num < 64) | |
275 | return chvt(num); | |
276 | ||
49e6fdbf | 277 | return -EINVAL; |
15403427 | 278 | } |
49e6fdbf DH |
279 | |
280 | return session_activate(s->positions[num]); | |
281 | } | |
282 | ||
283 | int seat_switch_to_next(Seat *s) { | |
284 | unsigned int start, i; | |
285 | ||
55493982 | 286 | if (s->position_count == 0) |
49e6fdbf DH |
287 | return -EINVAL; |
288 | ||
289 | start = 1; | |
e6494a07 DH |
290 | if (s->active && s->active->position > 0) |
291 | start = s->active->position; | |
49e6fdbf DH |
292 | |
293 | for (i = start + 1; i < s->position_count; ++i) | |
294 | if (s->positions[i]) | |
295 | return session_activate(s->positions[i]); | |
296 | ||
297 | for (i = 1; i < start; ++i) | |
298 | if (s->positions[i]) | |
299 | return session_activate(s->positions[i]); | |
300 | ||
301 | return -EINVAL; | |
302 | } | |
303 | ||
304 | int seat_switch_to_previous(Seat *s) { | |
305 | unsigned int start, i; | |
306 | ||
55493982 | 307 | if (s->position_count == 0) |
49e6fdbf DH |
308 | return -EINVAL; |
309 | ||
310 | start = 1; | |
e6494a07 DH |
311 | if (s->active && s->active->position > 0) |
312 | start = s->active->position; | |
49e6fdbf DH |
313 | |
314 | for (i = start - 1; i > 0; --i) | |
315 | if (s->positions[i]) | |
316 | return session_activate(s->positions[i]); | |
317 | ||
318 | for (i = s->position_count - 1; i > start; --i) | |
319 | if (s->positions[i]) | |
320 | return session_activate(s->positions[i]); | |
321 | ||
322 | return -EINVAL; | |
323 | } | |
324 | ||
92bd5ff3 | 325 | int seat_active_vt_changed(Seat *s, unsigned int vtnr) { |
9418f147 LP |
326 | Session *i, *new_active = NULL; |
327 | int r; | |
20263082 LP |
328 | |
329 | assert(s); | |
330 | assert(vtnr >= 1); | |
20263082 | 331 | |
bf7825ae | 332 | if (!seat_has_vts(s)) |
14c3baca LP |
333 | return -EINVAL; |
334 | ||
92bd5ff3 | 335 | log_debug("VT changed to %u", vtnr); |
20263082 | 336 | |
be94d954 MP |
337 | /* we might have earlier closing sessions on the same VT, so try to |
338 | * find a running one first */ | |
20263082 | 339 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
be94d954 | 340 | if (i->vtnr == vtnr && !i->stopping) { |
14c3baca | 341 | new_active = i; |
20263082 LP |
342 | break; |
343 | } | |
344 | ||
be94d954 MP |
345 | if (!new_active) { |
346 | /* no running one? then we can't decide which one is the | |
347 | * active one, let the first one win */ | |
348 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
349 | if (i->vtnr == vtnr) { | |
350 | new_active = i; | |
351 | break; | |
352 | } | |
353 | } | |
354 | ||
9418f147 | 355 | r = seat_set_active(s, new_active); |
5eda94dd | 356 | manager_spawn_autovt(s->manager, vtnr); |
20263082 | 357 | |
9418f147 | 358 | return r; |
20263082 LP |
359 | } |
360 | ||
14c3baca LP |
361 | int seat_read_active_vt(Seat *s) { |
362 | char t[64]; | |
363 | ssize_t k; | |
92bd5ff3 DH |
364 | unsigned int vtnr; |
365 | int r; | |
14c3baca LP |
366 | |
367 | assert(s); | |
368 | ||
bf7825ae | 369 | if (!seat_has_vts(s)) |
14c3baca LP |
370 | return 0; |
371 | ||
e8f3e7a7 ZJS |
372 | if (lseek(s->manager->console_active_fd, SEEK_SET, 0) < 0) |
373 | return log_error_errno(errno, "lseek on console_active_fd failed: %m"); | |
14c3baca LP |
374 | |
375 | k = read(s->manager->console_active_fd, t, sizeof(t)-1); | |
376 | if (k <= 0) { | |
377 | log_error("Failed to read current console: %s", k < 0 ? strerror(-errno) : "EOF"); | |
378 | return k < 0 ? -errno : -EIO; | |
379 | } | |
380 | ||
381 | t[k] = 0; | |
382 | truncate_nl(t); | |
383 | ||
384 | if (!startswith(t, "tty")) { | |
385 | log_error("Hm, /sys/class/tty/tty0/active is badly formatted."); | |
386 | return -EIO; | |
387 | } | |
388 | ||
92bd5ff3 | 389 | r = safe_atou(t+3, &vtnr); |
e8f3e7a7 ZJS |
390 | if (r < 0) |
391 | return log_error_errno(r, "Failed to parse VT number \"%s\": %m", t+3); | |
14c3baca | 392 | |
92bd5ff3 | 393 | if (!vtnr) { |
14c3baca LP |
394 | log_error("VT number invalid: %s", t+3); |
395 | return -EIO; | |
396 | } | |
397 | ||
398 | return seat_active_vt_changed(s, vtnr); | |
399 | } | |
400 | ||
401 | int seat_start(Seat *s) { | |
402 | assert(s); | |
403 | ||
3f49d45a LP |
404 | if (s->started) |
405 | return 0; | |
406 | ||
877d54e9 | 407 | log_struct(LOG_INFO, |
2b044526 | 408 | "MESSAGE_ID=" SD_MESSAGE_SEAT_START_STR, |
877d54e9 | 409 | "SEAT_ID=%s", s->id, |
a1230ff9 | 410 | LOG_MESSAGE("New seat %s.", s->id)); |
3f49d45a | 411 | |
14c3baca LP |
412 | /* Initialize VT magic stuff */ |
413 | seat_preallocate_vts(s); | |
414 | ||
415 | /* Read current VT */ | |
416 | seat_read_active_vt(s); | |
417 | ||
7f7bb946 LP |
418 | s->started = true; |
419 | ||
14c3baca LP |
420 | /* Save seat data */ |
421 | seat_save(s); | |
422 | ||
da119395 LP |
423 | seat_send_signal(s, true); |
424 | ||
14c3baca LP |
425 | return 0; |
426 | } | |
427 | ||
9bb69af4 | 428 | int seat_stop(Seat *s, bool force) { |
a185c5aa | 429 | int r = 0; |
20263082 LP |
430 | |
431 | assert(s); | |
432 | ||
ed18b08b | 433 | if (s->started) |
877d54e9 | 434 | log_struct(LOG_INFO, |
2b044526 | 435 | "MESSAGE_ID=" SD_MESSAGE_SEAT_STOP_STR, |
877d54e9 | 436 | "SEAT_ID=%s", s->id, |
a1230ff9 | 437 | LOG_MESSAGE("Removed seat %s.", s->id)); |
da119395 | 438 | |
9bb69af4 | 439 | seat_stop_sessions(s, force); |
a185c5aa LP |
440 | |
441 | unlink(s->state_file); | |
442 | seat_add_to_gc_queue(s); | |
443 | ||
ed18b08b LP |
444 | if (s->started) |
445 | seat_send_signal(s, false); | |
446 | ||
a185c5aa LP |
447 | s->started = false; |
448 | ||
449 | return r; | |
450 | } | |
451 | ||
9bb69af4 | 452 | int seat_stop_sessions(Seat *s, bool force) { |
a185c5aa LP |
453 | Session *session; |
454 | int r = 0, k; | |
455 | ||
456 | assert(s); | |
457 | ||
20263082 | 458 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { |
9bb69af4 | 459 | k = session_stop(session, force); |
20263082 LP |
460 | if (k < 0) |
461 | r = k; | |
462 | } | |
463 | ||
a185c5aa LP |
464 | return r; |
465 | } | |
14c3baca | 466 | |
49e6fdbf | 467 | void seat_evict_position(Seat *s, Session *session) { |
3e6b205f | 468 | Session *iter; |
e6494a07 | 469 | unsigned int pos = session->position; |
49e6fdbf | 470 | |
e6494a07 | 471 | session->position = 0; |
49e6fdbf | 472 | |
55493982 | 473 | if (pos == 0) |
49e6fdbf DH |
474 | return; |
475 | ||
3e6b205f | 476 | if (pos < s->position_count && s->positions[pos] == session) { |
49e6fdbf | 477 | s->positions[pos] = NULL; |
3e6b205f DH |
478 | |
479 | /* There might be another session claiming the same | |
55493982 | 480 | * position (eg., during gdm->session transition), so let's look |
3e6b205f DH |
481 | * for it and set it on the free slot. */ |
482 | LIST_FOREACH(sessions_by_seat, iter, s->sessions) { | |
28103328 | 483 | if (iter->position == pos && session_get_state(iter) != SESSION_CLOSING) { |
3e6b205f DH |
484 | s->positions[pos] = iter; |
485 | break; | |
486 | } | |
487 | } | |
488 | } | |
49e6fdbf DH |
489 | } |
490 | ||
491 | void seat_claim_position(Seat *s, Session *session, unsigned int pos) { | |
492 | /* with VTs, the position is always the same as the VTnr */ | |
493 | if (seat_has_vts(s)) | |
494 | pos = session->vtnr; | |
495 | ||
ca2d3784 | 496 | if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1)) |
49e6fdbf DH |
497 | return; |
498 | ||
499 | seat_evict_position(s, session); | |
500 | ||
e6494a07 | 501 | session->position = pos; |
da770c38 | 502 | if (pos > 0) |
49e6fdbf DH |
503 | s->positions[pos] = session; |
504 | } | |
505 | ||
506 | static void seat_assign_position(Seat *s, Session *session) { | |
507 | unsigned int pos; | |
508 | ||
e6494a07 | 509 | if (session->position > 0) |
49e6fdbf DH |
510 | return; |
511 | ||
512 | for (pos = 1; pos < s->position_count; ++pos) | |
513 | if (!s->positions[pos]) | |
514 | break; | |
515 | ||
516 | seat_claim_position(s, session, pos); | |
517 | } | |
518 | ||
a185c5aa LP |
519 | int seat_attach_session(Seat *s, Session *session) { |
520 | assert(s); | |
521 | assert(session); | |
522 | assert(!session->seat); | |
3f49d45a | 523 | |
c506027a DH |
524 | if (!seat_has_vts(s) != !session->vtnr) |
525 | return -EINVAL; | |
526 | ||
a185c5aa | 527 | session->seat = s; |
71fda00f | 528 | LIST_PREPEND(sessions_by_seat, s->sessions, session); |
49e6fdbf | 529 | seat_assign_position(s, session); |
a185c5aa | 530 | |
bf7825ae | 531 | /* On seats with VTs, the VT logic defines which session is active. On |
3fdb2494 DH |
532 | * seats without VTs, we automatically activate new sessions. */ |
533 | if (!seat_has_vts(s)) | |
9418f147 | 534 | seat_set_active(s, session); |
9418f147 | 535 | |
a185c5aa LP |
536 | return 0; |
537 | } | |
538 | ||
d7bd01b5 DH |
539 | void seat_complete_switch(Seat *s) { |
540 | Session *session; | |
541 | ||
542 | assert(s); | |
543 | ||
544 | /* if no session-switch is pending or if it got canceled, do nothing */ | |
545 | if (!s->pending_switch) | |
546 | return; | |
547 | ||
ae2a15bc | 548 | session = TAKE_PTR(s->pending_switch); |
d7bd01b5 DH |
549 | |
550 | seat_set_active(s, session); | |
551 | } | |
552 | ||
bf7825ae DH |
553 | bool seat_has_vts(Seat *s) { |
554 | assert(s); | |
555 | ||
556 | return seat_is_seat0(s) && s->manager->console_active_fd >= 0; | |
557 | } | |
558 | ||
92432fcc | 559 | bool seat_is_seat0(Seat *s) { |
a185c5aa LP |
560 | assert(s); |
561 | ||
92432fcc | 562 | return s->manager->seat0 == s; |
a185c5aa LP |
563 | } |
564 | ||
addedec4 LP |
565 | bool seat_can_multi_session(Seat *s) { |
566 | assert(s); | |
567 | ||
bf7825ae | 568 | return seat_has_vts(s); |
addedec4 LP |
569 | } |
570 | ||
f1a8e221 LP |
571 | bool seat_can_tty(Seat *s) { |
572 | assert(s); | |
573 | ||
bf7825ae | 574 | return seat_has_vts(s); |
f1a8e221 LP |
575 | } |
576 | ||
718d006a DH |
577 | bool seat_has_master_device(Seat *s) { |
578 | assert(s); | |
579 | ||
580 | /* device list is ordered by "master" flag */ | |
581 | return !!s->devices && s->devices->master; | |
582 | } | |
583 | ||
f1a8e221 LP |
584 | bool seat_can_graphical(Seat *s) { |
585 | assert(s); | |
586 | ||
718d006a | 587 | return seat_has_master_device(s); |
f1a8e221 LP |
588 | } |
589 | ||
a185c5aa LP |
590 | int seat_get_idle_hint(Seat *s, dual_timestamp *t) { |
591 | Session *session; | |
592 | bool idle_hint = true; | |
5cb14b37 | 593 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
a185c5aa LP |
594 | |
595 | assert(s); | |
596 | ||
597 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { | |
598 | dual_timestamp k; | |
599 | int ih; | |
600 | ||
601 | ih = session_get_idle_hint(session, &k); | |
602 | if (ih < 0) | |
603 | return ih; | |
604 | ||
605 | if (!ih) { | |
606 | if (!idle_hint) { | |
4a271908 | 607 | if (k.monotonic > ts.monotonic) |
a185c5aa LP |
608 | ts = k; |
609 | } else { | |
610 | idle_hint = false; | |
611 | ts = k; | |
612 | } | |
613 | } else if (idle_hint) { | |
614 | ||
615 | if (k.monotonic > ts.monotonic) | |
616 | ts = k; | |
617 | } | |
618 | } | |
619 | ||
620 | if (t) | |
621 | *t = ts; | |
622 | ||
623 | return idle_hint; | |
20263082 | 624 | } |
14c3baca | 625 | |
5c093a23 | 626 | bool seat_may_gc(Seat *s, bool drop_not_started) { |
14c3baca LP |
627 | assert(s); |
628 | ||
4a4b033f | 629 | if (drop_not_started && !s->started) |
5c093a23 | 630 | return true; |
932e3ee7 | 631 | |
92432fcc | 632 | if (seat_is_seat0(s)) |
5c093a23 | 633 | return false; |
14c3baca | 634 | |
5c093a23 | 635 | return !seat_has_master_device(s); |
14c3baca LP |
636 | } |
637 | ||
638 | void seat_add_to_gc_queue(Seat *s) { | |
639 | assert(s); | |
640 | ||
641 | if (s->in_gc_queue) | |
642 | return; | |
643 | ||
71fda00f | 644 | LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca LP |
645 | s->in_gc_queue = true; |
646 | } | |
3f49d45a LP |
647 | |
648 | static bool seat_name_valid_char(char c) { | |
649 | return | |
650 | (c >= 'a' && c <= 'z') || | |
651 | (c >= 'A' && c <= 'Z') || | |
652 | (c >= '0' && c <= '9') || | |
4c701096 | 653 | IN_SET(c, '-', '_'); |
3f49d45a LP |
654 | } |
655 | ||
656 | bool seat_name_is_valid(const char *name) { | |
657 | const char *p; | |
658 | ||
659 | assert(name); | |
660 | ||
661 | if (!startswith(name, "seat")) | |
662 | return false; | |
663 | ||
664 | if (!name[4]) | |
665 | return false; | |
666 | ||
667 | for (p = name; *p; p++) | |
668 | if (!seat_name_valid_char(*p)) | |
669 | return false; | |
670 | ||
1c9a2c10 LP |
671 | if (strlen(name) > 255) |
672 | return false; | |
673 | ||
3f49d45a LP |
674 | return true; |
675 | } |