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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> |
5eda94dd | 5 | #include <string.h> |
ca78ad1d | 6 | #include <sys/stat.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" |
6ecda0fb | 16 | #include "logind-seat-dbus.h" |
3ffd4af2 | 17 | #include "logind-seat.h" |
6ecda0fb | 18 | #include "logind-session-dbus.h" |
49e942b2 | 19 | #include "mkdir.h" |
6bedfcbb | 20 | #include "parse-util.h" |
d054f0a4 | 21 | #include "stdio-util.h" |
07630cea | 22 | #include "string-util.h" |
288a74cc | 23 | #include "terminal-util.h" |
e4de7287 | 24 | #include "tmpfile-util.h" |
07630cea | 25 | #include "util.h" |
20263082 | 26 | |
8c29a457 LP |
27 | int seat_new(Seat** ret, Manager *m, const char *id) { |
28 | _cleanup_(seat_freep) Seat *s = NULL; | |
29 | int r; | |
20263082 | 30 | |
8c29a457 | 31 | assert(ret); |
20263082 LP |
32 | assert(m); |
33 | assert(id); | |
34 | ||
8c29a457 LP |
35 | if (!seat_name_is_valid(id)) |
36 | return -EINVAL; | |
37 | ||
38 | s = new(Seat, 1); | |
20263082 | 39 | if (!s) |
8c29a457 LP |
40 | return -ENOMEM; |
41 | ||
42 | *s = (Seat) { | |
43 | .manager = m, | |
44 | }; | |
20263082 | 45 | |
98a28fef | 46 | s->state_file = strappend("/run/systemd/seats/", id); |
6b430fdb | 47 | if (!s->state_file) |
8c29a457 | 48 | return -ENOMEM; |
20263082 | 49 | |
2b6bf07d | 50 | s->id = basename(s->state_file); |
20263082 | 51 | |
8c29a457 LP |
52 | r = hashmap_put(m->seats, s->id, s); |
53 | if (r < 0) | |
54 | return r; | |
20263082 | 55 | |
8c29a457 LP |
56 | *ret = TAKE_PTR(s); |
57 | return 0; | |
20263082 LP |
58 | } |
59 | ||
8c29a457 LP |
60 | Seat* seat_free(Seat *s) { |
61 | if (!s) | |
62 | return NULL; | |
20263082 | 63 | |
14c3baca | 64 | if (s->in_gc_queue) |
71fda00f | 65 | LIST_REMOVE(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca | 66 | |
20263082 LP |
67 | while (s->sessions) |
68 | session_free(s->sessions); | |
69 | ||
70 | assert(!s->active); | |
71 | ||
72 | while (s->devices) | |
73 | device_free(s->devices); | |
74 | ||
75 | hashmap_remove(s->manager->seats, s->id); | |
76 | ||
49e6fdbf | 77 | free(s->positions); |
d2f92cdf | 78 | free(s->state_file); |
8c29a457 LP |
79 | |
80 | return mfree(s); | |
20263082 LP |
81 | } |
82 | ||
83 | int seat_save(Seat *s) { | |
cc377381 LP |
84 | _cleanup_free_ char *temp_path = NULL; |
85 | _cleanup_fclose_ FILE *f = NULL; | |
20263082 LP |
86 | int r; |
87 | ||
88 | assert(s); | |
89 | ||
accaeded LP |
90 | if (!s->started) |
91 | return 0; | |
92 | ||
37c1d5e9 | 93 | r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0, MKDIR_WARN_MODE); |
20263082 | 94 | if (r < 0) |
dacd6cee | 95 | goto fail; |
14c3baca LP |
96 | |
97 | r = fopen_temporary(s->state_file, &f, &temp_path); | |
98 | if (r < 0) | |
dacd6cee | 99 | goto fail; |
20263082 | 100 | |
0d536673 | 101 | (void) fchmod(fileno(f), 0644); |
20263082 LP |
102 | |
103 | fprintf(f, | |
14c3baca | 104 | "# This is private data. Do not parse.\n" |
92432fcc | 105 | "IS_SEAT0=%i\n" |
f1a8e221 LP |
106 | "CAN_MULTI_SESSION=%i\n" |
107 | "CAN_TTY=%i\n" | |
108 | "CAN_GRAPHICAL=%i\n", | |
92432fcc | 109 | seat_is_seat0(s), |
f1a8e221 LP |
110 | seat_can_multi_session(s), |
111 | seat_can_tty(s), | |
112 | seat_can_graphical(s)); | |
20263082 LP |
113 | |
114 | if (s->active) { | |
115 | assert(s->active->user); | |
116 | ||
117 | fprintf(f, | |
118 | "ACTIVE=%s\n" | |
a08ac7e0 | 119 | "ACTIVE_UID="UID_FMT"\n", |
20263082 | 120 | s->active->id, |
a08ac7e0 | 121 | s->active->user->uid); |
20263082 LP |
122 | } |
123 | ||
124 | if (s->sessions) { | |
125 | Session *i; | |
20263082 | 126 | |
0d536673 | 127 | fputs("SESSIONS=", f); |
20263082 | 128 | LIST_FOREACH(sessions_by_seat, i, s->sessions) { |
14c3baca LP |
129 | fprintf(f, |
130 | "%s%c", | |
131 | i->id, | |
132 | i->sessions_by_seat_next ? ' ' : '\n'); | |
133 | } | |
20263082 | 134 | |
0d536673 | 135 | fputs("UIDS=", f); |
fde78a3a | 136 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
20263082 | 137 | fprintf(f, |
90b2de37 ZJS |
138 | UID_FMT"%c", |
139 | i->user->uid, | |
14c3baca | 140 | i->sessions_by_seat_next ? ' ' : '\n'); |
20263082 LP |
141 | } |
142 | ||
dacd6cee LP |
143 | r = fflush_and_check(f); |
144 | if (r < 0) | |
145 | goto fail; | |
14c3baca | 146 | |
dacd6cee | 147 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 148 | r = -errno; |
dacd6cee | 149 | goto fail; |
20263082 LP |
150 | } |
151 | ||
dacd6cee LP |
152 | return 0; |
153 | ||
154 | fail: | |
155 | (void) unlink(s->state_file); | |
156 | ||
157 | if (temp_path) | |
158 | (void) unlink(temp_path); | |
14c3baca | 159 | |
dacd6cee | 160 | return log_error_errno(r, "Failed to save seat data %s: %m", s->state_file); |
20263082 LP |
161 | } |
162 | ||
163 | int seat_load(Seat *s) { | |
164 | assert(s); | |
165 | ||
a185c5aa LP |
166 | /* There isn't actually anything to read here ... */ |
167 | ||
20263082 LP |
168 | return 0; |
169 | } | |
170 | ||
14cb109d YW |
171 | static int vt_allocate(unsigned vtnr) { |
172 | char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned)]; | |
cc377381 | 173 | _cleanup_close_ int fd = -1; |
20263082 LP |
174 | |
175 | assert(vtnr >= 1); | |
176 | ||
d054f0a4 | 177 | xsprintf(p, "/dev/tty%u", vtnr); |
20263082 | 178 | fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC); |
cc377381 | 179 | if (fd < 0) |
cce08496 | 180 | return fd; |
20263082 | 181 | |
cc377381 | 182 | return 0; |
20263082 LP |
183 | } |
184 | ||
30ed21ce | 185 | int seat_preallocate_vts(Seat *s) { |
3f49d45a LP |
186 | int r = 0; |
187 | unsigned i; | |
20263082 LP |
188 | |
189 | assert(s); | |
190 | assert(s->manager); | |
191 | ||
30ed21ce LP |
192 | log_debug("Preallocating VTs..."); |
193 | ||
20263082 LP |
194 | if (s->manager->n_autovts <= 0) |
195 | return 0; | |
196 | ||
bf7825ae | 197 | if (!seat_has_vts(s)) |
20263082 LP |
198 | return 0; |
199 | ||
e7886786 | 200 | for (i = 1; i <= s->manager->n_autovts; i++) { |
20263082 LP |
201 | int q; |
202 | ||
203 | q = vt_allocate(i); | |
e555d126 LP |
204 | if (q < 0) |
205 | r = log_error_errno(q, "Failed to preallocate VT %u: %m", i); | |
20263082 LP |
206 | } |
207 | ||
208 | return r; | |
209 | } | |
210 | ||
5eda94dd LP |
211 | int seat_apply_acls(Seat *s, Session *old_active) { |
212 | int r; | |
20263082 | 213 | |
5eda94dd | 214 | assert(s); |
20263082 | 215 | |
4f209af7 | 216 | r = devnode_acl_all(s->id, |
5eda94dd LP |
217 | false, |
218 | !!old_active, old_active ? old_active->user->uid : 0, | |
219 | !!s->active, s->active ? s->active->user->uid : 0); | |
20263082 | 220 | |
5eda94dd | 221 | if (r < 0) |
e555d126 | 222 | return log_error_errno(r, "Failed to apply ACLs: %m"); |
20263082 | 223 | |
e555d126 | 224 | return 0; |
20263082 LP |
225 | } |
226 | ||
9418f147 LP |
227 | int seat_set_active(Seat *s, Session *session) { |
228 | Session *old_active; | |
229 | ||
230 | assert(s); | |
77527da0 | 231 | assert(!session || session->seat == s); |
9418f147 LP |
232 | |
233 | if (session == s->active) | |
234 | return 0; | |
235 | ||
236 | old_active = s->active; | |
237 | s->active = session; | |
238 | ||
dfd55270 | 239 | if (old_active) { |
118ecf32 | 240 | session_device_pause_all(old_active); |
cc377381 | 241 | session_send_changed(old_active, "Active", NULL); |
dfd55270 | 242 | } |
118ecf32 | 243 | |
75bbdf47 | 244 | (void) seat_apply_acls(s, old_active); |
9418f147 | 245 | |
118ecf32 | 246 | if (session && session->started) { |
cc377381 | 247 | session_send_changed(session, "Active", NULL); |
118ecf32 DH |
248 | session_device_resume_all(session); |
249 | } | |
9418f147 LP |
250 | |
251 | if (!session || session->started) | |
cc377381 | 252 | seat_send_changed(s, "ActiveSession", NULL); |
9418f147 | 253 | |
98a28fef LP |
254 | seat_save(s); |
255 | ||
7f7bb946 | 256 | if (session) { |
98a28fef | 257 | session_save(session); |
7f7bb946 LP |
258 | user_save(session->user); |
259 | } | |
98a28fef | 260 | |
7f7bb946 | 261 | if (old_active) { |
98a28fef | 262 | session_save(old_active); |
78ab361c CG |
263 | if (!session || session->user != old_active->user) |
264 | user_save(old_active->user); | |
7f7bb946 | 265 | } |
98a28fef | 266 | |
9418f147 LP |
267 | return 0; |
268 | } | |
269 | ||
14cb109d | 270 | int seat_switch_to(Seat *s, unsigned num) { |
49e6fdbf DH |
271 | /* Public session positions skip 0 (there is only F1-F12). Maybe it |
272 | * will get reassigned in the future, so return error for now. */ | |
55493982 | 273 | if (num == 0) |
49e6fdbf DH |
274 | return -EINVAL; |
275 | ||
15403427 DH |
276 | if (num >= s->position_count || !s->positions[num]) { |
277 | /* allow switching to unused VTs to trigger auto-activate */ | |
278 | if (seat_has_vts(s) && num < 64) | |
279 | return chvt(num); | |
280 | ||
49e6fdbf | 281 | return -EINVAL; |
15403427 | 282 | } |
49e6fdbf DH |
283 | |
284 | return session_activate(s->positions[num]); | |
285 | } | |
286 | ||
287 | int seat_switch_to_next(Seat *s) { | |
14cb109d | 288 | unsigned start, i; |
49e6fdbf | 289 | |
55493982 | 290 | if (s->position_count == 0) |
49e6fdbf DH |
291 | return -EINVAL; |
292 | ||
293 | start = 1; | |
e6494a07 DH |
294 | if (s->active && s->active->position > 0) |
295 | start = s->active->position; | |
49e6fdbf DH |
296 | |
297 | for (i = start + 1; i < s->position_count; ++i) | |
298 | if (s->positions[i]) | |
299 | return session_activate(s->positions[i]); | |
300 | ||
301 | for (i = 1; i < start; ++i) | |
302 | if (s->positions[i]) | |
303 | return session_activate(s->positions[i]); | |
304 | ||
305 | return -EINVAL; | |
306 | } | |
307 | ||
308 | int seat_switch_to_previous(Seat *s) { | |
14cb109d | 309 | unsigned start, i; |
49e6fdbf | 310 | |
55493982 | 311 | if (s->position_count == 0) |
49e6fdbf DH |
312 | return -EINVAL; |
313 | ||
314 | start = 1; | |
e6494a07 DH |
315 | if (s->active && s->active->position > 0) |
316 | start = s->active->position; | |
49e6fdbf DH |
317 | |
318 | for (i = start - 1; i > 0; --i) | |
319 | if (s->positions[i]) | |
320 | return session_activate(s->positions[i]); | |
321 | ||
322 | for (i = s->position_count - 1; i > start; --i) | |
323 | if (s->positions[i]) | |
324 | return session_activate(s->positions[i]); | |
325 | ||
326 | return -EINVAL; | |
327 | } | |
328 | ||
14cb109d | 329 | int seat_active_vt_changed(Seat *s, unsigned vtnr) { |
9418f147 LP |
330 | Session *i, *new_active = NULL; |
331 | int r; | |
20263082 LP |
332 | |
333 | assert(s); | |
334 | assert(vtnr >= 1); | |
20263082 | 335 | |
bf7825ae | 336 | if (!seat_has_vts(s)) |
14c3baca LP |
337 | return -EINVAL; |
338 | ||
92bd5ff3 | 339 | log_debug("VT changed to %u", vtnr); |
20263082 | 340 | |
be94d954 MP |
341 | /* we might have earlier closing sessions on the same VT, so try to |
342 | * find a running one first */ | |
20263082 | 343 | LIST_FOREACH(sessions_by_seat, i, s->sessions) |
be94d954 | 344 | if (i->vtnr == vtnr && !i->stopping) { |
14c3baca | 345 | new_active = i; |
20263082 LP |
346 | break; |
347 | } | |
348 | ||
be94d954 MP |
349 | if (!new_active) { |
350 | /* no running one? then we can't decide which one is the | |
351 | * active one, let the first one win */ | |
352 | LIST_FOREACH(sessions_by_seat, i, s->sessions) | |
353 | if (i->vtnr == vtnr) { | |
354 | new_active = i; | |
355 | break; | |
356 | } | |
357 | } | |
358 | ||
9418f147 | 359 | r = seat_set_active(s, new_active); |
5eda94dd | 360 | manager_spawn_autovt(s->manager, vtnr); |
20263082 | 361 | |
9418f147 | 362 | return r; |
20263082 LP |
363 | } |
364 | ||
14c3baca LP |
365 | int seat_read_active_vt(Seat *s) { |
366 | char t[64]; | |
367 | ssize_t k; | |
49679ff7 | 368 | int vtnr; |
14c3baca LP |
369 | |
370 | assert(s); | |
371 | ||
bf7825ae | 372 | if (!seat_has_vts(s)) |
14c3baca LP |
373 | return 0; |
374 | ||
e8f3e7a7 ZJS |
375 | if (lseek(s->manager->console_active_fd, SEEK_SET, 0) < 0) |
376 | return log_error_errno(errno, "lseek on console_active_fd failed: %m"); | |
14c3baca LP |
377 | |
378 | k = read(s->manager->console_active_fd, t, sizeof(t)-1); | |
379 | if (k <= 0) { | |
65641b3c | 380 | log_error("Failed to read current console: %s", k < 0 ? strerror(errno) : "EOF"); |
14c3baca LP |
381 | return k < 0 ? -errno : -EIO; |
382 | } | |
383 | ||
384 | t[k] = 0; | |
385 | truncate_nl(t); | |
386 | ||
49679ff7 FB |
387 | vtnr = vtnr_from_tty(t); |
388 | if (vtnr < 0) { | |
389 | log_error_errno(vtnr, "Hm, /sys/class/tty/tty0/active is badly formatted: %m"); | |
14c3baca LP |
390 | return -EIO; |
391 | } | |
392 | ||
393 | return seat_active_vt_changed(s, vtnr); | |
394 | } | |
395 | ||
396 | int seat_start(Seat *s) { | |
397 | assert(s); | |
398 | ||
3f49d45a LP |
399 | if (s->started) |
400 | return 0; | |
401 | ||
877d54e9 | 402 | log_struct(LOG_INFO, |
2b044526 | 403 | "MESSAGE_ID=" SD_MESSAGE_SEAT_START_STR, |
877d54e9 | 404 | "SEAT_ID=%s", s->id, |
a1230ff9 | 405 | LOG_MESSAGE("New seat %s.", s->id)); |
3f49d45a | 406 | |
14c3baca LP |
407 | /* Initialize VT magic stuff */ |
408 | seat_preallocate_vts(s); | |
409 | ||
410 | /* Read current VT */ | |
411 | seat_read_active_vt(s); | |
412 | ||
7f7bb946 LP |
413 | s->started = true; |
414 | ||
14c3baca LP |
415 | /* Save seat data */ |
416 | seat_save(s); | |
417 | ||
da119395 LP |
418 | seat_send_signal(s, true); |
419 | ||
14c3baca LP |
420 | return 0; |
421 | } | |
422 | ||
9bb69af4 | 423 | int seat_stop(Seat *s, bool force) { |
e6958b7e | 424 | int r; |
20263082 LP |
425 | |
426 | assert(s); | |
427 | ||
ed18b08b | 428 | if (s->started) |
877d54e9 | 429 | log_struct(LOG_INFO, |
2b044526 | 430 | "MESSAGE_ID=" SD_MESSAGE_SEAT_STOP_STR, |
877d54e9 | 431 | "SEAT_ID=%s", s->id, |
a1230ff9 | 432 | LOG_MESSAGE("Removed seat %s.", s->id)); |
da119395 | 433 | |
e6958b7e | 434 | r = seat_stop_sessions(s, force); |
a185c5aa | 435 | |
75bbdf47 | 436 | (void) unlink(s->state_file); |
a185c5aa LP |
437 | seat_add_to_gc_queue(s); |
438 | ||
ed18b08b LP |
439 | if (s->started) |
440 | seat_send_signal(s, false); | |
441 | ||
a185c5aa LP |
442 | s->started = false; |
443 | ||
444 | return r; | |
445 | } | |
446 | ||
9bb69af4 | 447 | int seat_stop_sessions(Seat *s, bool force) { |
a185c5aa LP |
448 | Session *session; |
449 | int r = 0, k; | |
450 | ||
451 | assert(s); | |
452 | ||
20263082 | 453 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { |
9bb69af4 | 454 | k = session_stop(session, force); |
20263082 LP |
455 | if (k < 0) |
456 | r = k; | |
457 | } | |
458 | ||
a185c5aa LP |
459 | return r; |
460 | } | |
14c3baca | 461 | |
49e6fdbf | 462 | void seat_evict_position(Seat *s, Session *session) { |
3e6b205f | 463 | Session *iter; |
14cb109d | 464 | unsigned pos = session->position; |
49e6fdbf | 465 | |
e6494a07 | 466 | session->position = 0; |
49e6fdbf | 467 | |
55493982 | 468 | if (pos == 0) |
49e6fdbf DH |
469 | return; |
470 | ||
3e6b205f | 471 | if (pos < s->position_count && s->positions[pos] == session) { |
49e6fdbf | 472 | s->positions[pos] = NULL; |
3e6b205f DH |
473 | |
474 | /* There might be another session claiming the same | |
55493982 | 475 | * position (eg., during gdm->session transition), so let's look |
3e6b205f DH |
476 | * for it and set it on the free slot. */ |
477 | LIST_FOREACH(sessions_by_seat, iter, s->sessions) { | |
28103328 | 478 | if (iter->position == pos && session_get_state(iter) != SESSION_CLOSING) { |
3e6b205f DH |
479 | s->positions[pos] = iter; |
480 | break; | |
481 | } | |
482 | } | |
483 | } | |
49e6fdbf DH |
484 | } |
485 | ||
14cb109d | 486 | void seat_claim_position(Seat *s, Session *session, unsigned pos) { |
49e6fdbf DH |
487 | /* with VTs, the position is always the same as the VTnr */ |
488 | if (seat_has_vts(s)) | |
489 | pos = session->vtnr; | |
490 | ||
ca2d3784 | 491 | if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1)) |
49e6fdbf DH |
492 | return; |
493 | ||
494 | seat_evict_position(s, session); | |
495 | ||
e6494a07 | 496 | session->position = pos; |
da770c38 | 497 | if (pos > 0) |
49e6fdbf DH |
498 | s->positions[pos] = session; |
499 | } | |
500 | ||
501 | static void seat_assign_position(Seat *s, Session *session) { | |
14cb109d | 502 | unsigned pos; |
49e6fdbf | 503 | |
e6494a07 | 504 | if (session->position > 0) |
49e6fdbf DH |
505 | return; |
506 | ||
507 | for (pos = 1; pos < s->position_count; ++pos) | |
508 | if (!s->positions[pos]) | |
509 | break; | |
510 | ||
511 | seat_claim_position(s, session, pos); | |
512 | } | |
513 | ||
a185c5aa LP |
514 | int seat_attach_session(Seat *s, Session *session) { |
515 | assert(s); | |
516 | assert(session); | |
517 | assert(!session->seat); | |
3f49d45a | 518 | |
c506027a DH |
519 | if (!seat_has_vts(s) != !session->vtnr) |
520 | return -EINVAL; | |
521 | ||
a185c5aa | 522 | session->seat = s; |
71fda00f | 523 | LIST_PREPEND(sessions_by_seat, s->sessions, session); |
49e6fdbf | 524 | seat_assign_position(s, session); |
a185c5aa | 525 | |
bf7825ae | 526 | /* On seats with VTs, the VT logic defines which session is active. On |
3fdb2494 DH |
527 | * seats without VTs, we automatically activate new sessions. */ |
528 | if (!seat_has_vts(s)) | |
9418f147 | 529 | seat_set_active(s, session); |
9418f147 | 530 | |
a185c5aa LP |
531 | return 0; |
532 | } | |
533 | ||
d7bd01b5 DH |
534 | void seat_complete_switch(Seat *s) { |
535 | Session *session; | |
536 | ||
537 | assert(s); | |
538 | ||
539 | /* if no session-switch is pending or if it got canceled, do nothing */ | |
540 | if (!s->pending_switch) | |
541 | return; | |
542 | ||
ae2a15bc | 543 | session = TAKE_PTR(s->pending_switch); |
d7bd01b5 DH |
544 | |
545 | seat_set_active(s, session); | |
546 | } | |
547 | ||
bf7825ae DH |
548 | bool seat_has_vts(Seat *s) { |
549 | assert(s); | |
550 | ||
551 | return seat_is_seat0(s) && s->manager->console_active_fd >= 0; | |
552 | } | |
553 | ||
92432fcc | 554 | bool seat_is_seat0(Seat *s) { |
a185c5aa LP |
555 | assert(s); |
556 | ||
92432fcc | 557 | return s->manager->seat0 == s; |
a185c5aa LP |
558 | } |
559 | ||
addedec4 LP |
560 | bool seat_can_multi_session(Seat *s) { |
561 | assert(s); | |
562 | ||
bf7825ae | 563 | return seat_has_vts(s); |
addedec4 LP |
564 | } |
565 | ||
f1a8e221 LP |
566 | bool seat_can_tty(Seat *s) { |
567 | assert(s); | |
568 | ||
bf7825ae | 569 | return seat_has_vts(s); |
f1a8e221 LP |
570 | } |
571 | ||
718d006a DH |
572 | bool seat_has_master_device(Seat *s) { |
573 | assert(s); | |
574 | ||
575 | /* device list is ordered by "master" flag */ | |
576 | return !!s->devices && s->devices->master; | |
577 | } | |
578 | ||
f1a8e221 LP |
579 | bool seat_can_graphical(Seat *s) { |
580 | assert(s); | |
581 | ||
718d006a | 582 | return seat_has_master_device(s); |
f1a8e221 LP |
583 | } |
584 | ||
a185c5aa LP |
585 | int seat_get_idle_hint(Seat *s, dual_timestamp *t) { |
586 | Session *session; | |
587 | bool idle_hint = true; | |
5cb14b37 | 588 | dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
a185c5aa LP |
589 | |
590 | assert(s); | |
591 | ||
592 | LIST_FOREACH(sessions_by_seat, session, s->sessions) { | |
593 | dual_timestamp k; | |
594 | int ih; | |
595 | ||
596 | ih = session_get_idle_hint(session, &k); | |
597 | if (ih < 0) | |
598 | return ih; | |
599 | ||
600 | if (!ih) { | |
601 | if (!idle_hint) { | |
4a271908 | 602 | if (k.monotonic > ts.monotonic) |
a185c5aa LP |
603 | ts = k; |
604 | } else { | |
605 | idle_hint = false; | |
606 | ts = k; | |
607 | } | |
608 | } else if (idle_hint) { | |
609 | ||
610 | if (k.monotonic > ts.monotonic) | |
611 | ts = k; | |
612 | } | |
613 | } | |
614 | ||
615 | if (t) | |
616 | *t = ts; | |
617 | ||
618 | return idle_hint; | |
20263082 | 619 | } |
14c3baca | 620 | |
5c093a23 | 621 | bool seat_may_gc(Seat *s, bool drop_not_started) { |
14c3baca LP |
622 | assert(s); |
623 | ||
4a4b033f | 624 | if (drop_not_started && !s->started) |
5c093a23 | 625 | return true; |
932e3ee7 | 626 | |
92432fcc | 627 | if (seat_is_seat0(s)) |
5c093a23 | 628 | return false; |
14c3baca | 629 | |
5c093a23 | 630 | return !seat_has_master_device(s); |
14c3baca LP |
631 | } |
632 | ||
633 | void seat_add_to_gc_queue(Seat *s) { | |
634 | assert(s); | |
635 | ||
636 | if (s->in_gc_queue) | |
637 | return; | |
638 | ||
71fda00f | 639 | LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s); |
14c3baca LP |
640 | s->in_gc_queue = true; |
641 | } | |
3f49d45a LP |
642 | |
643 | static bool seat_name_valid_char(char c) { | |
644 | return | |
645 | (c >= 'a' && c <= 'z') || | |
646 | (c >= 'A' && c <= 'Z') || | |
647 | (c >= '0' && c <= '9') || | |
4c701096 | 648 | IN_SET(c, '-', '_'); |
3f49d45a LP |
649 | } |
650 | ||
651 | bool seat_name_is_valid(const char *name) { | |
652 | const char *p; | |
653 | ||
654 | assert(name); | |
655 | ||
656 | if (!startswith(name, "seat")) | |
657 | return false; | |
658 | ||
659 | if (!name[4]) | |
660 | return false; | |
661 | ||
662 | for (p = name; *p; p++) | |
663 | if (!seat_name_valid_char(*p)) | |
664 | return false; | |
665 | ||
1c9a2c10 LP |
666 | if (strlen(name) > 255) |
667 | return false; | |
668 | ||
3f49d45a LP |
669 | return true; |
670 | } |