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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
20263082 | 2 | |
20263082 | 3 | #include <errno.h> |
20263082 | 4 | #include <fcntl.h> |
0d536673 | 5 | #include <stdio_ext.h> |
5eda94dd | 6 | #include <string.h> |
07630cea | 7 | #include <unistd.h> |
20263082 | 8 | |
cc377381 | 9 | #include "sd-messages.h" |
07630cea | 10 | |
b5efdb8a | 11 | #include "alloc-util.h" |
3ffd4af2 | 12 | #include "fd-util.h" |
0d39fa9c | 13 | #include "fileio.h" |
f97b34a6 | 14 | #include "format-util.h" |
5eda94dd | 15 | #include "logind-acl.h" |
3ffd4af2 | 16 | #include "logind-seat.h" |
49e942b2 | 17 | #include "mkdir.h" |
6bedfcbb | 18 | #include "parse-util.h" |
d054f0a4 | 19 | #include "stdio-util.h" |
07630cea | 20 | #include "string-util.h" |
288a74cc | 21 | #include "terminal-util.h" |
e4de7287 | 22 | #include "tmpfile-util.h" |
07630cea | 23 | #include "util.h" |
20263082 | 24 | |
8c29a457 LP |
25 | int seat_new(Seat** ret, Manager *m, const char *id) { |
26 | _cleanup_(seat_freep) Seat *s = NULL; | |
27 | int r; | |
20263082 | 28 | |
8c29a457 | 29 | assert(ret); |
20263082 LP |
30 | assert(m); |
31 | assert(id); | |
32 | ||
8c29a457 LP |
33 | if (!seat_name_is_valid(id)) |
34 | return -EINVAL; | |
35 | ||
36 | s = new(Seat, 1); | |
20263082 | 37 | if (!s) |
8c29a457 LP |
38 | return -ENOMEM; |
39 | ||
40 | *s = (Seat) { | |
41 | .manager = m, | |
42 | }; | |
20263082 | 43 | |
98a28fef | 44 | s->state_file = strappend("/run/systemd/seats/", id); |
6b430fdb | 45 | if (!s->state_file) |
8c29a457 | 46 | return -ENOMEM; |
20263082 | 47 | |
2b6bf07d | 48 | s->id = basename(s->state_file); |
20263082 | 49 | |
8c29a457 LP |
50 | r = hashmap_put(m->seats, s->id, s); |
51 | if (r < 0) | |
52 | return r; | |
20263082 | 53 | |
8c29a457 LP |
54 | *ret = TAKE_PTR(s); |
55 | return 0; | |
20263082 LP |
56 | } |
57 | ||
8c29a457 LP |
58 | Seat* seat_free(Seat *s) { |
59 | if (!s) | |
60 | return NULL; | |
20263082 | 61 | |
14c3baca | 62 | if (s->in_gc_queue) |
71fda00f | 63 | LIST_REMOVE(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca | 64 | |
20263082 LP |
65 | while (s->sessions) |
66 | session_free(s->sessions); | |
67 | ||
68 | assert(!s->active); | |
69 | ||
70 | while (s->devices) | |
71 | device_free(s->devices); | |
72 | ||
73 | hashmap_remove(s->manager->seats, s->id); | |
74 | ||
49e6fdbf | 75 | free(s->positions); |
d2f92cdf | 76 | free(s->state_file); |
8c29a457 LP |
77 | |
78 | return mfree(s); | |
20263082 LP |
79 | } |
80 | ||
81 | int seat_save(Seat *s) { | |
cc377381 LP |
82 | _cleanup_free_ char *temp_path = NULL; |
83 | _cleanup_fclose_ FILE *f = NULL; | |
20263082 LP |
84 | int r; |
85 | ||
86 | assert(s); | |
87 | ||
accaeded LP |
88 | if (!s->started) |
89 | return 0; | |
90 | ||
37c1d5e9 | 91 | r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0, MKDIR_WARN_MODE); |
20263082 | 92 | if (r < 0) |
dacd6cee | 93 | goto fail; |
14c3baca LP |
94 | |
95 | r = fopen_temporary(s->state_file, &f, &temp_path); | |
96 | if (r < 0) | |
dacd6cee | 97 | goto fail; |
20263082 | 98 | |
0d536673 LP |
99 | (void) __fsetlocking(f, FSETLOCKING_BYCALLER); |
100 | (void) fchmod(fileno(f), 0644); | |
20263082 LP |
101 | |
102 | fprintf(f, | |
14c3baca | 103 | "# This is private data. Do not parse.\n" |
92432fcc | 104 | "IS_SEAT0=%i\n" |
f1a8e221 LP |
105 | "CAN_MULTI_SESSION=%i\n" |
106 | "CAN_TTY=%i\n" | |
107 | "CAN_GRAPHICAL=%i\n", | |
92432fcc | 108 | seat_is_seat0(s), |
f1a8e221 LP |
109 | seat_can_multi_session(s), |
110 | seat_can_tty(s), | |
111 | seat_can_graphical(s)); | |
20263082 LP |
112 | |
113 | if (s->active) { | |
114 | assert(s->active->user); | |
115 | ||
116 | fprintf(f, | |
117 | "ACTIVE=%s\n" | |
a08ac7e0 | 118 | "ACTIVE_UID="UID_FMT"\n", |
20263082 | 119 | s->active->id, |
a08ac7e0 | 120 | s->active->user->uid); |
20263082 LP |
121 | } |
122 | ||
123 | if (s->sessions) { | |
124 | Session *i; | |
20263082 | 125 | |
0d536673 | 126 | fputs("SESSIONS=", f); |
20263082 | 127 | LIST_FOREACH(sessions_by_seat, i, s->sessions) { |
14c3baca LP |
128 | fprintf(f, |
129 | "%s%c", | |
130 | i->id, | |
131 | i->sessions_by_seat_next ? ' ' : '\n'); | |
132 | } | |
20263082 | 133 | |
0d536673 | 134 | fputs("UIDS=", f); |
fde78a3a | 135 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
20263082 | 136 | fprintf(f, |
90b2de37 ZJS |
137 | UID_FMT"%c", |
138 | i->user->uid, | |
14c3baca | 139 | i->sessions_by_seat_next ? ' ' : '\n'); |
20263082 LP |
140 | } |
141 | ||
dacd6cee LP |
142 | r = fflush_and_check(f); |
143 | if (r < 0) | |
144 | goto fail; | |
14c3baca | 145 | |
dacd6cee | 146 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 147 | r = -errno; |
dacd6cee | 148 | goto fail; |
20263082 LP |
149 | } |
150 | ||
dacd6cee LP |
151 | return 0; |
152 | ||
153 | fail: | |
154 | (void) unlink(s->state_file); | |
155 | ||
156 | if (temp_path) | |
157 | (void) unlink(temp_path); | |
14c3baca | 158 | |
dacd6cee | 159 | return log_error_errno(r, "Failed to save seat data %s: %m", s->state_file); |
20263082 LP |
160 | } |
161 | ||
162 | int seat_load(Seat *s) { | |
163 | assert(s); | |
164 | ||
a185c5aa LP |
165 | /* There isn't actually anything to read here ... */ |
166 | ||
20263082 LP |
167 | return 0; |
168 | } | |
169 | ||
14cb109d YW |
170 | static int vt_allocate(unsigned vtnr) { |
171 | char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned)]; | |
cc377381 | 172 | _cleanup_close_ int fd = -1; |
20263082 LP |
173 | |
174 | assert(vtnr >= 1); | |
175 | ||
d054f0a4 | 176 | xsprintf(p, "/dev/tty%u", vtnr); |
20263082 | 177 | fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC); |
cc377381 | 178 | if (fd < 0) |
cce08496 | 179 | return fd; |
20263082 | 180 | |
cc377381 | 181 | return 0; |
20263082 LP |
182 | } |
183 | ||
30ed21ce | 184 | int seat_preallocate_vts(Seat *s) { |
3f49d45a LP |
185 | int r = 0; |
186 | unsigned i; | |
20263082 LP |
187 | |
188 | assert(s); | |
189 | assert(s->manager); | |
190 | ||
30ed21ce LP |
191 | log_debug("Preallocating VTs..."); |
192 | ||
20263082 LP |
193 | if (s->manager->n_autovts <= 0) |
194 | return 0; | |
195 | ||
bf7825ae | 196 | if (!seat_has_vts(s)) |
20263082 LP |
197 | return 0; |
198 | ||
e7886786 | 199 | for (i = 1; i <= s->manager->n_autovts; i++) { |
20263082 LP |
200 | int q; |
201 | ||
202 | q = vt_allocate(i); | |
e555d126 LP |
203 | if (q < 0) |
204 | r = log_error_errno(q, "Failed to preallocate VT %u: %m", i); | |
20263082 LP |
205 | } |
206 | ||
207 | return r; | |
208 | } | |
209 | ||
5eda94dd LP |
210 | int seat_apply_acls(Seat *s, Session *old_active) { |
211 | int r; | |
20263082 | 212 | |
5eda94dd | 213 | assert(s); |
20263082 | 214 | |
4f209af7 | 215 | r = devnode_acl_all(s->id, |
5eda94dd LP |
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) |
e555d126 | 221 | return log_error_errno(r, "Failed to apply ACLs: %m"); |
20263082 | 222 | |
e555d126 | 223 | return 0; |
20263082 LP |
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 | |
75bbdf47 | 243 | (void) seat_apply_acls(s, old_active); |
9418f147 | 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 | ||
14cb109d | 269 | int seat_switch_to(Seat *s, unsigned num) { |
49e6fdbf DH |
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) { | |
14cb109d | 287 | unsigned start, i; |
49e6fdbf | 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) { | |
14cb109d | 308 | unsigned start, i; |
49e6fdbf | 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 | ||
14cb109d | 328 | int seat_active_vt_changed(Seat *s, unsigned 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; | |
49679ff7 | 367 | int vtnr; |
14c3baca LP |
368 | |
369 | assert(s); | |
370 | ||
bf7825ae | 371 | if (!seat_has_vts(s)) |
14c3baca LP |
372 | return 0; |
373 | ||
e8f3e7a7 ZJS |
374 | if (lseek(s->manager->console_active_fd, SEEK_SET, 0) < 0) |
375 | return log_error_errno(errno, "lseek on console_active_fd failed: %m"); | |
14c3baca LP |
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 | ||
49679ff7 FB |
386 | vtnr = vtnr_from_tty(t); |
387 | if (vtnr < 0) { | |
388 | log_error_errno(vtnr, "Hm, /sys/class/tty/tty0/active is badly formatted: %m"); | |
14c3baca LP |
389 | return -EIO; |
390 | } | |
391 | ||
392 | return seat_active_vt_changed(s, vtnr); | |
393 | } | |
394 | ||
395 | int seat_start(Seat *s) { | |
396 | assert(s); | |
397 | ||
3f49d45a LP |
398 | if (s->started) |
399 | return 0; | |
400 | ||
877d54e9 | 401 | log_struct(LOG_INFO, |
2b044526 | 402 | "MESSAGE_ID=" SD_MESSAGE_SEAT_START_STR, |
877d54e9 | 403 | "SEAT_ID=%s", s->id, |
a1230ff9 | 404 | LOG_MESSAGE("New seat %s.", s->id)); |
3f49d45a | 405 | |
14c3baca LP |
406 | /* Initialize VT magic stuff */ |
407 | seat_preallocate_vts(s); | |
408 | ||
409 | /* Read current VT */ | |
410 | seat_read_active_vt(s); | |
411 | ||
7f7bb946 LP |
412 | s->started = true; |
413 | ||
14c3baca LP |
414 | /* Save seat data */ |
415 | seat_save(s); | |
416 | ||
da119395 LP |
417 | seat_send_signal(s, true); |
418 | ||
14c3baca LP |
419 | return 0; |
420 | } | |
421 | ||
9bb69af4 | 422 | int seat_stop(Seat *s, bool force) { |
e6958b7e | 423 | int r; |
20263082 LP |
424 | |
425 | assert(s); | |
426 | ||
ed18b08b | 427 | if (s->started) |
877d54e9 | 428 | log_struct(LOG_INFO, |
2b044526 | 429 | "MESSAGE_ID=" SD_MESSAGE_SEAT_STOP_STR, |
877d54e9 | 430 | "SEAT_ID=%s", s->id, |
a1230ff9 | 431 | LOG_MESSAGE("Removed seat %s.", s->id)); |
da119395 | 432 | |
e6958b7e | 433 | r = seat_stop_sessions(s, force); |
a185c5aa | 434 | |
75bbdf47 | 435 | (void) unlink(s->state_file); |
a185c5aa LP |
436 | seat_add_to_gc_queue(s); |
437 | ||
ed18b08b LP |
438 | if (s->started) |
439 | seat_send_signal(s, false); | |
440 | ||
a185c5aa LP |
441 | s->started = false; |
442 | ||
443 | return r; | |
444 | } | |
445 | ||
9bb69af4 | 446 | int seat_stop_sessions(Seat *s, bool force) { |
a185c5aa LP |
447 | Session *session; |
448 | int r = 0, k; | |
449 | ||
450 | assert(s); | |
451 | ||
20263082 | 452 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { |
9bb69af4 | 453 | k = session_stop(session, force); |
20263082 LP |
454 | if (k < 0) |
455 | r = k; | |
456 | } | |
457 | ||
a185c5aa LP |
458 | return r; |
459 | } | |
14c3baca | 460 | |
49e6fdbf | 461 | void seat_evict_position(Seat *s, Session *session) { |
3e6b205f | 462 | Session *iter; |
14cb109d | 463 | unsigned pos = session->position; |
49e6fdbf | 464 | |
e6494a07 | 465 | session->position = 0; |
49e6fdbf | 466 | |
55493982 | 467 | if (pos == 0) |
49e6fdbf DH |
468 | return; |
469 | ||
3e6b205f | 470 | if (pos < s->position_count && s->positions[pos] == session) { |
49e6fdbf | 471 | s->positions[pos] = NULL; |
3e6b205f DH |
472 | |
473 | /* There might be another session claiming the same | |
55493982 | 474 | * position (eg., during gdm->session transition), so let's look |
3e6b205f DH |
475 | * for it and set it on the free slot. */ |
476 | LIST_FOREACH(sessions_by_seat, iter, s->sessions) { | |
28103328 | 477 | if (iter->position == pos && session_get_state(iter) != SESSION_CLOSING) { |
3e6b205f DH |
478 | s->positions[pos] = iter; |
479 | break; | |
480 | } | |
481 | } | |
482 | } | |
49e6fdbf DH |
483 | } |
484 | ||
14cb109d | 485 | void seat_claim_position(Seat *s, Session *session, unsigned pos) { |
49e6fdbf DH |
486 | /* with VTs, the position is always the same as the VTnr */ |
487 | if (seat_has_vts(s)) | |
488 | pos = session->vtnr; | |
489 | ||
ca2d3784 | 490 | if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1)) |
49e6fdbf DH |
491 | return; |
492 | ||
493 | seat_evict_position(s, session); | |
494 | ||
e6494a07 | 495 | session->position = pos; |
da770c38 | 496 | if (pos > 0) |
49e6fdbf DH |
497 | s->positions[pos] = session; |
498 | } | |
499 | ||
500 | static void seat_assign_position(Seat *s, Session *session) { | |
14cb109d | 501 | unsigned pos; |
49e6fdbf | 502 | |
e6494a07 | 503 | if (session->position > 0) |
49e6fdbf DH |
504 | return; |
505 | ||
506 | for (pos = 1; pos < s->position_count; ++pos) | |
507 | if (!s->positions[pos]) | |
508 | break; | |
509 | ||
510 | seat_claim_position(s, session, pos); | |
511 | } | |
512 | ||
a185c5aa LP |
513 | int seat_attach_session(Seat *s, Session *session) { |
514 | assert(s); | |
515 | assert(session); | |
516 | assert(!session->seat); | |
3f49d45a | 517 | |
c506027a DH |
518 | if (!seat_has_vts(s) != !session->vtnr) |
519 | return -EINVAL; | |
520 | ||
a185c5aa | 521 | session->seat = s; |
71fda00f | 522 | LIST_PREPEND(sessions_by_seat, s->sessions, session); |
49e6fdbf | 523 | seat_assign_position(s, session); |
a185c5aa | 524 | |
bf7825ae | 525 | /* On seats with VTs, the VT logic defines which session is active. On |
3fdb2494 DH |
526 | * seats without VTs, we automatically activate new sessions. */ |
527 | if (!seat_has_vts(s)) | |
9418f147 | 528 | seat_set_active(s, session); |
9418f147 | 529 | |
a185c5aa LP |
530 | return 0; |
531 | } | |
532 | ||
d7bd01b5 DH |
533 | void seat_complete_switch(Seat *s) { |
534 | Session *session; | |
535 | ||
536 | assert(s); | |
537 | ||
538 | /* if no session-switch is pending or if it got canceled, do nothing */ | |
539 | if (!s->pending_switch) | |
540 | return; | |
541 | ||
ae2a15bc | 542 | session = TAKE_PTR(s->pending_switch); |
d7bd01b5 DH |
543 | |
544 | seat_set_active(s, session); | |
545 | } | |
546 | ||
bf7825ae DH |
547 | bool seat_has_vts(Seat *s) { |
548 | assert(s); | |
549 | ||
550 | return seat_is_seat0(s) && s->manager->console_active_fd >= 0; | |
551 | } | |
552 | ||
92432fcc | 553 | bool seat_is_seat0(Seat *s) { |
a185c5aa LP |
554 | assert(s); |
555 | ||
92432fcc | 556 | return s->manager->seat0 == s; |
a185c5aa LP |
557 | } |
558 | ||
addedec4 LP |
559 | bool seat_can_multi_session(Seat *s) { |
560 | assert(s); | |
561 | ||
bf7825ae | 562 | return seat_has_vts(s); |
addedec4 LP |
563 | } |
564 | ||
f1a8e221 LP |
565 | bool seat_can_tty(Seat *s) { |
566 | assert(s); | |
567 | ||
bf7825ae | 568 | return seat_has_vts(s); |
f1a8e221 LP |
569 | } |
570 | ||
718d006a DH |
571 | bool seat_has_master_device(Seat *s) { |
572 | assert(s); | |
573 | ||
574 | /* device list is ordered by "master" flag */ | |
575 | return !!s->devices && s->devices->master; | |
576 | } | |
577 | ||
f1a8e221 LP |
578 | bool seat_can_graphical(Seat *s) { |
579 | assert(s); | |
580 | ||
718d006a | 581 | return seat_has_master_device(s); |
f1a8e221 LP |
582 | } |
583 | ||
a185c5aa LP |
584 | int seat_get_idle_hint(Seat *s, dual_timestamp *t) { |
585 | Session *session; | |
586 | bool idle_hint = true; | |
5cb14b37 | 587 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
a185c5aa LP |
588 | |
589 | assert(s); | |
590 | ||
591 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { | |
592 | dual_timestamp k; | |
593 | int ih; | |
594 | ||
595 | ih = session_get_idle_hint(session, &k); | |
596 | if (ih < 0) | |
597 | return ih; | |
598 | ||
599 | if (!ih) { | |
600 | if (!idle_hint) { | |
4a271908 | 601 | if (k.monotonic > ts.monotonic) |
a185c5aa LP |
602 | ts = k; |
603 | } else { | |
604 | idle_hint = false; | |
605 | ts = k; | |
606 | } | |
607 | } else if (idle_hint) { | |
608 | ||
609 | if (k.monotonic > ts.monotonic) | |
610 | ts = k; | |
611 | } | |
612 | } | |
613 | ||
614 | if (t) | |
615 | *t = ts; | |
616 | ||
617 | return idle_hint; | |
20263082 | 618 | } |
14c3baca | 619 | |
5c093a23 | 620 | bool seat_may_gc(Seat *s, bool drop_not_started) { |
14c3baca LP |
621 | assert(s); |
622 | ||
4a4b033f | 623 | if (drop_not_started && !s->started) |
5c093a23 | 624 | return true; |
932e3ee7 | 625 | |
92432fcc | 626 | if (seat_is_seat0(s)) |
5c093a23 | 627 | return false; |
14c3baca | 628 | |
5c093a23 | 629 | return !seat_has_master_device(s); |
14c3baca LP |
630 | } |
631 | ||
632 | void seat_add_to_gc_queue(Seat *s) { | |
633 | assert(s); | |
634 | ||
635 | if (s->in_gc_queue) | |
636 | return; | |
637 | ||
71fda00f | 638 | LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca LP |
639 | s->in_gc_queue = true; |
640 | } | |
3f49d45a LP |
641 | |
642 | static bool seat_name_valid_char(char c) { | |
643 | return | |
644 | (c >= 'a' && c <= 'z') || | |
645 | (c >= 'A' && c <= 'Z') || | |
646 | (c >= '0' && c <= '9') || | |
4c701096 | 647 | IN_SET(c, '-', '_'); |
3f49d45a LP |
648 | } |
649 | ||
650 | bool seat_name_is_valid(const char *name) { | |
651 | const char *p; | |
652 | ||
653 | assert(name); | |
654 | ||
655 | if (!startswith(name, "seat")) | |
656 | return false; | |
657 | ||
658 | if (!name[4]) | |
659 | return false; | |
660 | ||
661 | for (p = name; *p; p++) | |
662 | if (!seat_name_valid_char(*p)) | |
663 | return false; | |
664 | ||
1c9a2c10 LP |
665 | if (strlen(name) > 255) |
666 | return false; | |
667 | ||
3f49d45a LP |
668 | return true; |
669 | } |