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Commit | Line | Data |
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20263082 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
20263082 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
20263082 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
20263082 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
90a18413 DH |
23 | #include <fcntl.h> |
24 | #include <linux/vt.h> | |
25 | #include <linux/kd.h> | |
26 | #include <signal.h> | |
20263082 | 27 | #include <string.h> |
90a18413 | 28 | #include <sys/ioctl.h> |
20263082 LP |
29 | #include <unistd.h> |
30 | ||
cc377381 LP |
31 | #include "sd-id128.h" |
32 | #include "sd-messages.h" | |
20263082 LP |
33 | #include "strv.h" |
34 | #include "util.h" | |
49e942b2 | 35 | #include "mkdir.h" |
9eb977db | 36 | #include "path-util.h" |
a5c32cff | 37 | #include "fileio.h" |
cc377381 LP |
38 | #include "audit.h" |
39 | #include "bus-util.h" | |
40 | #include "bus-error.h" | |
fb6becb4 | 41 | #include "logind-session.h" |
20263082 | 42 | |
5f41d1f1 LP |
43 | #define RELEASE_USEC (20*USEC_PER_SEC) |
44 | ||
45 | static void session_remove_fifo(Session *s); | |
46 | ||
9444b1f2 | 47 | Session* session_new(Manager *m, const char *id) { |
20263082 LP |
48 | Session *s; |
49 | ||
50 | assert(m); | |
51 | assert(id); | |
4b549144 | 52 | assert(session_id_valid(id)); |
20263082 | 53 | |
14c3baca | 54 | s = new0(Session, 1); |
20263082 LP |
55 | if (!s) |
56 | return NULL; | |
57 | ||
98a28fef | 58 | s->state_file = strappend("/run/systemd/sessions/", id); |
20263082 LP |
59 | if (!s->state_file) { |
60 | free(s); | |
61 | return NULL; | |
62 | } | |
63 | ||
d5099efc | 64 | s->devices = hashmap_new(&devt_hash_ops); |
118ecf32 DH |
65 | if (!s->devices) { |
66 | free(s->state_file); | |
67 | free(s); | |
68 | return NULL; | |
69 | } | |
70 | ||
2b6bf07d | 71 | s->id = basename(s->state_file); |
20263082 LP |
72 | |
73 | if (hashmap_put(m->sessions, s->id, s) < 0) { | |
118ecf32 | 74 | hashmap_free(s->devices); |
f8e2fb7b | 75 | free(s->state_file); |
20263082 LP |
76 | free(s); |
77 | return NULL; | |
78 | } | |
79 | ||
80 | s->manager = m; | |
932e3ee7 | 81 | s->fifo_fd = -1; |
90a18413 | 82 | s->vtfd = -1; |
20263082 LP |
83 | |
84 | return s; | |
85 | } | |
86 | ||
87 | void session_free(Session *s) { | |
118ecf32 DH |
88 | SessionDevice *sd; |
89 | ||
20263082 LP |
90 | assert(s); |
91 | ||
14c3baca | 92 | if (s->in_gc_queue) |
71fda00f | 93 | LIST_REMOVE(gc_queue, s->manager->session_gc_queue, s); |
14c3baca | 94 | |
5f41d1f1 LP |
95 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
96 | ||
cc377381 LP |
97 | session_remove_fifo(s); |
98 | ||
ae5e06bd DH |
99 | session_drop_controller(s); |
100 | ||
118ecf32 DH |
101 | while ((sd = hashmap_first(s->devices))) |
102 | session_device_free(sd); | |
103 | ||
104 | hashmap_free(s->devices); | |
105 | ||
20263082 | 106 | if (s->user) { |
71fda00f | 107 | LIST_REMOVE(sessions_by_user, s->user->sessions, s); |
20263082 LP |
108 | |
109 | if (s->user->display == s) | |
110 | s->user->display = NULL; | |
111 | } | |
112 | ||
9418f147 LP |
113 | if (s->seat) { |
114 | if (s->seat->active == s) | |
115 | s->seat->active = NULL; | |
d7bd01b5 DH |
116 | if (s->seat->pending_switch == s) |
117 | s->seat->pending_switch = NULL; | |
9418f147 | 118 | |
49e6fdbf | 119 | seat_evict_position(s->seat, s); |
71fda00f | 120 | LIST_REMOVE(sessions_by_seat, s->seat->sessions, s); |
9418f147 | 121 | } |
20263082 | 122 | |
fb6becb4 LP |
123 | if (s->scope) { |
124 | hashmap_remove(s->manager->session_units, s->scope); | |
125 | free(s->scope); | |
126 | } | |
127 | ||
128 | free(s->scope_job); | |
1713813d | 129 | |
cc377381 | 130 | sd_bus_message_unref(s->create_message); |
20263082 LP |
131 | |
132 | free(s->tty); | |
133 | free(s->display); | |
134 | free(s->remote_host); | |
3f49d45a | 135 | free(s->remote_user); |
98a28fef | 136 | free(s->service); |
a4cd87e9 | 137 | free(s->desktop); |
20263082 LP |
138 | |
139 | hashmap_remove(s->manager->sessions, s->id); | |
98a28fef | 140 | |
d2f92cdf | 141 | free(s->state_file); |
20263082 LP |
142 | free(s); |
143 | } | |
144 | ||
9444b1f2 LP |
145 | void session_set_user(Session *s, User *u) { |
146 | assert(s); | |
147 | assert(!s->user); | |
148 | ||
149 | s->user = u; | |
71fda00f | 150 | LIST_PREPEND(sessions_by_user, u->sessions, s); |
9444b1f2 LP |
151 | } |
152 | ||
20263082 | 153 | int session_save(Session *s) { |
507f22bd | 154 | _cleanup_free_ char *temp_path = NULL; |
cc377381 | 155 | _cleanup_fclose_ FILE *f = NULL; |
20263082 LP |
156 | int r = 0; |
157 | ||
158 | assert(s); | |
159 | ||
9444b1f2 LP |
160 | if (!s->user) |
161 | return -ESTALE; | |
162 | ||
accaeded LP |
163 | if (!s->started) |
164 | return 0; | |
165 | ||
d2e54fae | 166 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
20263082 | 167 | if (r < 0) |
14c3baca | 168 | goto finish; |
20263082 | 169 | |
14c3baca LP |
170 | r = fopen_temporary(s->state_file, &f, &temp_path); |
171 | if (r < 0) | |
172 | goto finish; | |
20263082 LP |
173 | |
174 | assert(s->user); | |
175 | ||
14c3baca LP |
176 | fchmod(fileno(f), 0644); |
177 | ||
20263082 LP |
178 | fprintf(f, |
179 | "# This is private data. Do not parse.\n" | |
90b2de37 | 180 | "UID="UID_FMT"\n" |
20263082 LP |
181 | "USER=%s\n" |
182 | "ACTIVE=%i\n" | |
0604381b | 183 | "STATE=%s\n" |
fb6becb4 | 184 | "REMOTE=%i\n", |
90b2de37 | 185 | s->user->uid, |
20263082 LP |
186 | s->user->name, |
187 | session_is_active(s), | |
0604381b | 188 | session_state_to_string(session_get_state(s)), |
fb6becb4 | 189 | s->remote); |
20263082 | 190 | |
a91e4e53 | 191 | if (s->type >= 0) |
507f22bd | 192 | fprintf(f, "TYPE=%s\n", session_type_to_string(s->type)); |
a91e4e53 | 193 | |
55efac6c | 194 | if (s->class >= 0) |
507f22bd | 195 | fprintf(f, "CLASS=%s\n", session_class_to_string(s->class)); |
55efac6c | 196 | |
fb6becb4 LP |
197 | if (s->scope) |
198 | fprintf(f, "SCOPE=%s\n", s->scope); | |
fb6becb4 LP |
199 | if (s->scope_job) |
200 | fprintf(f, "SCOPE_JOB=%s\n", s->scope_job); | |
20263082 | 201 | |
932e3ee7 | 202 | if (s->fifo_path) |
507f22bd | 203 | fprintf(f, "FIFO=%s\n", s->fifo_path); |
932e3ee7 | 204 | |
20263082 | 205 | if (s->seat) |
507f22bd | 206 | fprintf(f, "SEAT=%s\n", s->seat->id); |
20263082 LP |
207 | |
208 | if (s->tty) | |
507f22bd | 209 | fprintf(f, "TTY=%s\n", s->tty); |
20263082 LP |
210 | |
211 | if (s->display) | |
507f22bd | 212 | fprintf(f, "DISPLAY=%s\n", s->display); |
20263082 | 213 | |
558c6490 LP |
214 | if (s->remote_host) { |
215 | _cleanup_free_ char *escaped; | |
216 | ||
217 | escaped = cescape(s->remote_host); | |
218 | if (!escaped) { | |
219 | r = -ENOMEM; | |
220 | goto finish; | |
221 | } | |
222 | ||
223 | fprintf(f, "REMOTE_HOST=%s\n", escaped); | |
224 | } | |
225 | ||
226 | if (s->remote_user) { | |
227 | _cleanup_free_ char *escaped; | |
228 | ||
229 | escaped = cescape(s->remote_user); | |
230 | if (!escaped) { | |
231 | r = -ENOMEM; | |
232 | goto finish; | |
233 | } | |
234 | ||
235 | fprintf(f, "REMOTE_USER=%s\n", escaped); | |
236 | } | |
237 | ||
238 | if (s->service) { | |
239 | _cleanup_free_ char *escaped; | |
20263082 | 240 | |
558c6490 LP |
241 | escaped = cescape(s->service); |
242 | if (!escaped) { | |
243 | r = -ENOMEM; | |
244 | goto finish; | |
245 | } | |
246 | ||
247 | fprintf(f, "SERVICE=%s\n", escaped); | |
248 | } | |
3f49d45a | 249 | |
558c6490 LP |
250 | if (s->desktop) { |
251 | _cleanup_free_ char *escaped; | |
98a28fef | 252 | |
558c6490 LP |
253 | |
254 | escaped = cescape(s->desktop); | |
255 | if (!escaped) { | |
256 | r = -ENOMEM; | |
257 | goto finish; | |
258 | } | |
259 | ||
260 | fprintf(f, "DESKTOP=%s\n", escaped); | |
261 | } | |
a4cd87e9 | 262 | |
bf7825ae | 263 | if (s->seat && seat_has_vts(s->seat)) |
92bd5ff3 | 264 | fprintf(f, "VTNR=%u\n", s->vtnr); |
20263082 | 265 | |
49e6fdbf DH |
266 | if (!s->vtnr) |
267 | fprintf(f, "POS=%u\n", s->pos); | |
268 | ||
20263082 | 269 | if (s->leader > 0) |
90b2de37 | 270 | fprintf(f, "LEADER="PID_FMT"\n", s->leader); |
20263082 LP |
271 | |
272 | if (s->audit_id > 0) | |
507f22bd | 273 | fprintf(f, "AUDIT=%"PRIu32"\n", s->audit_id); |
20263082 | 274 | |
9444b1f2 LP |
275 | if (dual_timestamp_is_set(&s->timestamp)) |
276 | fprintf(f, | |
90b2de37 ZJS |
277 | "REALTIME="USEC_FMT"\n" |
278 | "MONOTONIC="USEC_FMT"\n", | |
279 | s->timestamp.realtime, | |
280 | s->timestamp.monotonic); | |
9444b1f2 | 281 | |
6d33772f DH |
282 | if (s->controller) |
283 | fprintf(f, "CONTROLLER=%s\n", s->controller); | |
284 | ||
20263082 | 285 | fflush(f); |
14c3baca LP |
286 | |
287 | if (ferror(f) || rename(temp_path, s->state_file) < 0) { | |
20263082 LP |
288 | r = -errno; |
289 | unlink(s->state_file); | |
14c3baca | 290 | unlink(temp_path); |
20263082 LP |
291 | } |
292 | ||
14c3baca LP |
293 | finish: |
294 | if (r < 0) | |
da927ba9 | 295 | log_error_errno(r, "Failed to save session data %s: %m", s->state_file); |
14c3baca | 296 | |
20263082 LP |
297 | return r; |
298 | } | |
299 | ||
300 | int session_load(Session *s) { | |
9444b1f2 | 301 | _cleanup_free_ char *remote = NULL, |
a185c5aa LP |
302 | *seat = NULL, |
303 | *vtnr = NULL, | |
49e6fdbf | 304 | *pos = NULL, |
a185c5aa | 305 | *leader = NULL, |
55efac6c | 306 | *type = NULL, |
9444b1f2 LP |
307 | *class = NULL, |
308 | *uid = NULL, | |
309 | *realtime = NULL, | |
6d33772f DH |
310 | *monotonic = NULL, |
311 | *controller = NULL; | |
a185c5aa LP |
312 | |
313 | int k, r; | |
314 | ||
20263082 LP |
315 | assert(s); |
316 | ||
a185c5aa LP |
317 | r = parse_env_file(s->state_file, NEWLINE, |
318 | "REMOTE", &remote, | |
fb6becb4 LP |
319 | "SCOPE", &s->scope, |
320 | "SCOPE_JOB", &s->scope_job, | |
932e3ee7 | 321 | "FIFO", &s->fifo_path, |
a185c5aa LP |
322 | "SEAT", &seat, |
323 | "TTY", &s->tty, | |
324 | "DISPLAY", &s->display, | |
325 | "REMOTE_HOST", &s->remote_host, | |
326 | "REMOTE_USER", &s->remote_user, | |
98a28fef | 327 | "SERVICE", &s->service, |
a4cd87e9 | 328 | "DESKTOP", &s->desktop, |
a185c5aa | 329 | "VTNR", &vtnr, |
49e6fdbf | 330 | "POS", &pos, |
a185c5aa | 331 | "LEADER", &leader, |
a91e4e53 | 332 | "TYPE", &type, |
55efac6c | 333 | "CLASS", &class, |
9444b1f2 LP |
334 | "UID", &uid, |
335 | "REALTIME", &realtime, | |
336 | "MONOTONIC", &monotonic, | |
6d33772f | 337 | "CONTROLLER", &controller, |
a185c5aa LP |
338 | NULL); |
339 | ||
f647962d MS |
340 | if (r < 0) |
341 | return log_error_errno(r, "Failed to read %s: %m", s->state_file); | |
9444b1f2 LP |
342 | |
343 | if (!s->user) { | |
344 | uid_t u; | |
345 | User *user; | |
346 | ||
347 | if (!uid) { | |
348 | log_error("UID not specified for session %s", s->id); | |
349 | return -ENOENT; | |
350 | } | |
351 | ||
352 | r = parse_uid(uid, &u); | |
353 | if (r < 0) { | |
354 | log_error("Failed to parse UID value %s for session %s.", uid, s->id); | |
355 | return r; | |
356 | } | |
357 | ||
358 | user = hashmap_get(s->manager->users, ULONG_TO_PTR((unsigned long) u)); | |
359 | if (!user) { | |
360 | log_error("User of session %s not known.", s->id); | |
361 | return -ENOENT; | |
362 | } | |
363 | ||
364 | session_set_user(s, user); | |
365 | } | |
a185c5aa LP |
366 | |
367 | if (remote) { | |
368 | k = parse_boolean(remote); | |
369 | if (k >= 0) | |
370 | s->remote = k; | |
371 | } | |
372 | ||
c506027a DH |
373 | if (vtnr) |
374 | safe_atou(vtnr, &s->vtnr); | |
375 | ||
9418f147 | 376 | if (seat && !s->seat) { |
a185c5aa LP |
377 | Seat *o; |
378 | ||
379 | o = hashmap_get(s->manager->seats, seat); | |
380 | if (o) | |
c506027a DH |
381 | r = seat_attach_session(o, s); |
382 | if (!o || r < 0) | |
383 | log_error("Cannot attach session %s to seat %s", s->id, seat); | |
a185c5aa LP |
384 | } |
385 | ||
c506027a DH |
386 | if (!s->seat || !seat_has_vts(s->seat)) |
387 | s->vtnr = 0; | |
a185c5aa | 388 | |
49e6fdbf DH |
389 | if (pos && s->seat) { |
390 | unsigned int npos; | |
391 | ||
392 | safe_atou(pos, &npos); | |
393 | seat_claim_position(s->seat, s, npos); | |
394 | } | |
395 | ||
a185c5aa | 396 | if (leader) { |
f8e2fb7b LP |
397 | k = parse_pid(leader, &s->leader); |
398 | if (k >= 0) | |
399 | audit_session_from_pid(s->leader, &s->audit_id); | |
a185c5aa LP |
400 | } |
401 | ||
a91e4e53 LP |
402 | if (type) { |
403 | SessionType t; | |
404 | ||
405 | t = session_type_from_string(type); | |
406 | if (t >= 0) | |
407 | s->type = t; | |
408 | } | |
409 | ||
55efac6c LP |
410 | if (class) { |
411 | SessionClass c; | |
412 | ||
413 | c = session_class_from_string(class); | |
414 | if (c >= 0) | |
415 | s->class = c; | |
416 | } | |
417 | ||
b4f78aea LP |
418 | if (s->fifo_path) { |
419 | int fd; | |
420 | ||
421 | /* If we open an unopened pipe for reading we will not | |
422 | get an EOF. to trigger an EOF we hence open it for | |
423 | reading, but close it right-away which then will | |
424 | trigger the EOF. */ | |
425 | ||
426 | fd = session_create_fifo(s); | |
03e334a1 | 427 | safe_close(fd); |
b4f78aea LP |
428 | } |
429 | ||
9444b1f2 LP |
430 | if (realtime) { |
431 | unsigned long long l; | |
432 | if (sscanf(realtime, "%llu", &l) > 0) | |
433 | s->timestamp.realtime = l; | |
434 | } | |
435 | ||
436 | if (monotonic) { | |
437 | unsigned long long l; | |
438 | if (sscanf(monotonic, "%llu", &l) > 0) | |
439 | s->timestamp.monotonic = l; | |
440 | } | |
a185c5aa | 441 | |
6d33772f DH |
442 | if (controller) { |
443 | if (bus_name_has_owner(s->manager->bus, controller, NULL) > 0) | |
444 | session_set_controller(s, controller, false); | |
90a18413 DH |
445 | else |
446 | session_restore_vt(s); | |
6d33772f DH |
447 | } |
448 | ||
a185c5aa | 449 | return r; |
20263082 LP |
450 | } |
451 | ||
452 | int session_activate(Session *s) { | |
d7bd01b5 DH |
453 | unsigned int num_pending; |
454 | ||
20263082 | 455 | assert(s); |
9444b1f2 | 456 | assert(s->user); |
20263082 | 457 | |
20263082 LP |
458 | if (!s->seat) |
459 | return -ENOTSUP; | |
460 | ||
461 | if (s->seat->active == s) | |
462 | return 0; | |
463 | ||
d7bd01b5 DH |
464 | /* on seats with VTs, we let VTs manage session-switching */ |
465 | if (seat_has_vts(s->seat)) { | |
92bd5ff3 | 466 | if (!s->vtnr) |
d7bd01b5 DH |
467 | return -ENOTSUP; |
468 | ||
469 | return chvt(s->vtnr); | |
470 | } | |
471 | ||
472 | /* On seats without VTs, we implement session-switching in logind. We | |
473 | * try to pause all session-devices and wait until the session | |
474 | * controller acknowledged them. Once all devices are asleep, we simply | |
475 | * switch the active session and be done. | |
476 | * We save the session we want to switch to in seat->pending_switch and | |
477 | * seat_complete_switch() will perform the final switch. */ | |
478 | ||
479 | s->seat->pending_switch = s; | |
480 | ||
481 | /* if no devices are running, immediately perform the session switch */ | |
482 | num_pending = session_device_try_pause_all(s); | |
483 | if (!num_pending) | |
484 | seat_complete_switch(s->seat); | |
20263082 | 485 | |
d7bd01b5 | 486 | return 0; |
20263082 LP |
487 | } |
488 | ||
fb6becb4 | 489 | static int session_start_scope(Session *s) { |
98a28fef LP |
490 | int r; |
491 | ||
492 | assert(s); | |
9444b1f2 | 493 | assert(s->user); |
fb6becb4 | 494 | assert(s->user->slice); |
98a28fef | 495 | |
fb6becb4 | 496 | if (!s->scope) { |
cc377381 | 497 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
d0af76e6 | 498 | _cleanup_free_ char *description = NULL; |
39883f62 | 499 | char *scope, *job = NULL; |
d0af76e6 | 500 | |
405e0255 LP |
501 | description = strjoin("Session ", s->id, " of user ", s->user->name, NULL); |
502 | if (!description) | |
503 | return log_oom(); | |
504 | ||
d0af76e6 LP |
505 | scope = strjoin("session-", s->id, ".scope", NULL); |
506 | if (!scope) | |
ae018d9b LP |
507 | return log_oom(); |
508 | ||
646e392e | 509 | r = manager_start_scope(s->manager, scope, s->leader, s->user->slice, description, "systemd-logind.service", "systemd-user-sessions.service", &error, &job); |
d0af76e6 | 510 | if (r < 0) { |
042f5988 | 511 | log_error("Failed to start session scope %s: %s %s", |
cc377381 | 512 | scope, bus_error_message(&error, r), error.name); |
d0af76e6 | 513 | free(scope); |
f2d4f98d | 514 | return r; |
d0af76e6 LP |
515 | } else { |
516 | s->scope = scope; | |
517 | ||
518 | free(s->scope_job); | |
519 | s->scope_job = job; | |
520 | } | |
20263082 LP |
521 | } |
522 | ||
d0af76e6 LP |
523 | if (s->scope) |
524 | hashmap_put(s->manager->session_units, s->scope, s); | |
525 | ||
20263082 LP |
526 | return 0; |
527 | } | |
528 | ||
529 | int session_start(Session *s) { | |
530 | int r; | |
531 | ||
532 | assert(s); | |
9444b1f2 LP |
533 | |
534 | if (!s->user) | |
535 | return -ESTALE; | |
20263082 | 536 | |
9418f147 LP |
537 | if (s->started) |
538 | return 0; | |
539 | ||
ed18b08b LP |
540 | r = user_start(s->user); |
541 | if (r < 0) | |
542 | return r; | |
543 | ||
fb6becb4 LP |
544 | /* Create cgroup */ |
545 | r = session_start_scope(s); | |
546 | if (r < 0) | |
547 | return r; | |
548 | ||
d9eb81f9 | 549 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 550 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_START), |
877d54e9 LP |
551 | "SESSION_ID=%s", s->id, |
552 | "USER_ID=%s", s->user->name, | |
de0671ee | 553 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 554 | LOG_MESSAGE("New session %s of user %s.", s->id, s->user->name), |
877d54e9 | 555 | NULL); |
98a28fef | 556 | |
9444b1f2 LP |
557 | if (!dual_timestamp_is_set(&s->timestamp)) |
558 | dual_timestamp_get(&s->timestamp); | |
14c3baca | 559 | |
e9816c48 LP |
560 | if (s->seat) |
561 | seat_read_active_vt(s->seat); | |
562 | ||
9418f147 LP |
563 | s->started = true; |
564 | ||
952d3260 LP |
565 | user_elect_display(s->user); |
566 | ||
5f41d1f1 | 567 | /* Save data */ |
e9816c48 | 568 | session_save(s); |
7f7bb946 | 569 | user_save(s->user); |
5f41d1f1 LP |
570 | if (s->seat) |
571 | seat_save(s->seat); | |
e9816c48 | 572 | |
5f41d1f1 | 573 | /* Send signals */ |
da119395 | 574 | session_send_signal(s, true); |
952d3260 | 575 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 LP |
576 | if (s->seat) { |
577 | if (s->seat->active == s) | |
cc377381 | 578 | seat_send_changed(s->seat, "Sessions", "ActiveSession", NULL); |
9418f147 | 579 | else |
cc377381 | 580 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
581 | } |
582 | ||
20263082 LP |
583 | return 0; |
584 | } | |
585 | ||
9bb69af4 | 586 | static int session_stop_scope(Session *s, bool force) { |
cc377381 | 587 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
39883f62 | 588 | char *job = NULL; |
20263082 | 589 | int r; |
20263082 LP |
590 | |
591 | assert(s); | |
592 | ||
fb6becb4 LP |
593 | if (!s->scope) |
594 | return 0; | |
9b221b63 | 595 | |
9bb69af4 | 596 | if (force || manager_shall_kill(s->manager, s->user->name)) { |
5f41d1f1 LP |
597 | r = manager_stop_unit(s->manager, s->scope, &error, &job); |
598 | if (r < 0) { | |
599 | log_error("Failed to stop session scope: %s", bus_error_message(&error, r)); | |
600 | return r; | |
601 | } | |
20263082 | 602 | |
5f41d1f1 LP |
603 | free(s->scope_job); |
604 | s->scope_job = job; | |
605 | } else { | |
606 | r = manager_abandon_scope(s->manager, s->scope, &error); | |
607 | if (r < 0) { | |
608 | log_error("Failed to abandon session scope: %s", bus_error_message(&error, r)); | |
609 | return r; | |
610 | } | |
611 | } | |
20263082 | 612 | |
9b221b63 | 613 | return 0; |
20263082 LP |
614 | } |
615 | ||
9bb69af4 | 616 | int session_stop(Session *s, bool force) { |
405e0255 LP |
617 | int r; |
618 | ||
619 | assert(s); | |
620 | ||
621 | if (!s->user) | |
622 | return -ESTALE; | |
623 | ||
5f41d1f1 LP |
624 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
625 | ||
626 | /* We are going down, don't care about FIFOs anymore */ | |
627 | session_remove_fifo(s); | |
628 | ||
405e0255 | 629 | /* Kill cgroup */ |
9bb69af4 | 630 | r = session_stop_scope(s, force); |
405e0255 | 631 | |
5f41d1f1 LP |
632 | s->stopping = true; |
633 | ||
952d3260 LP |
634 | user_elect_display(s->user); |
635 | ||
405e0255 | 636 | session_save(s); |
cc377381 | 637 | user_save(s->user); |
405e0255 LP |
638 | |
639 | return r; | |
640 | } | |
641 | ||
642 | int session_finalize(Session *s) { | |
643 | int r = 0; | |
118ecf32 | 644 | SessionDevice *sd; |
20263082 LP |
645 | |
646 | assert(s); | |
647 | ||
9444b1f2 LP |
648 | if (!s->user) |
649 | return -ESTALE; | |
650 | ||
ed18b08b | 651 | if (s->started) |
d9eb81f9 | 652 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 653 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_STOP), |
877d54e9 LP |
654 | "SESSION_ID=%s", s->id, |
655 | "USER_ID=%s", s->user->name, | |
de0671ee | 656 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 657 | LOG_MESSAGE("Removed session %s.", s->id), |
877d54e9 | 658 | NULL); |
98a28fef | 659 | |
5f41d1f1 LP |
660 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
661 | ||
118ecf32 DH |
662 | /* Kill session devices */ |
663 | while ((sd = hashmap_first(s->devices))) | |
664 | session_device_free(sd); | |
665 | ||
d2f92cdf LP |
666 | unlink(s->state_file); |
667 | session_add_to_gc_queue(s); | |
ed18b08b | 668 | user_add_to_gc_queue(s->user); |
14c3baca | 669 | |
405e0255 | 670 | if (s->started) { |
ed18b08b | 671 | session_send_signal(s, false); |
405e0255 LP |
672 | s->started = false; |
673 | } | |
50fb9793 | 674 | |
9418f147 LP |
675 | if (s->seat) { |
676 | if (s->seat->active == s) | |
677 | seat_set_active(s->seat, NULL); | |
678 | ||
23bd3b62 | 679 | seat_save(s->seat); |
5f41d1f1 | 680 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
681 | } |
682 | ||
23bd3b62 | 683 | user_save(s->user); |
952d3260 | 684 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 | 685 | |
20263082 LP |
686 | return r; |
687 | } | |
688 | ||
5f41d1f1 LP |
689 | static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { |
690 | Session *s = userdata; | |
691 | ||
692 | assert(es); | |
693 | assert(s); | |
694 | ||
9bb69af4 | 695 | session_stop(s, false); |
5f41d1f1 LP |
696 | return 0; |
697 | } | |
698 | ||
699 | void session_release(Session *s) { | |
700 | assert(s); | |
701 | ||
702 | if (!s->started || s->stopping) | |
703 | return; | |
704 | ||
705 | if (!s->timer_event_source) | |
6a0f1f6d LP |
706 | sd_event_add_time(s->manager->event, |
707 | &s->timer_event_source, | |
708 | CLOCK_MONOTONIC, | |
709 | now(CLOCK_MONOTONIC) + RELEASE_USEC, 0, | |
710 | release_timeout_callback, s); | |
5f41d1f1 LP |
711 | } |
712 | ||
20263082 LP |
713 | bool session_is_active(Session *s) { |
714 | assert(s); | |
715 | ||
716 | if (!s->seat) | |
717 | return true; | |
718 | ||
719 | return s->seat->active == s; | |
720 | } | |
721 | ||
23406ce5 LP |
722 | static int get_tty_atime(const char *tty, usec_t *atime) { |
723 | _cleanup_free_ char *p = NULL; | |
a185c5aa | 724 | struct stat st; |
23406ce5 LP |
725 | |
726 | assert(tty); | |
727 | assert(atime); | |
728 | ||
729 | if (!path_is_absolute(tty)) { | |
730 | p = strappend("/dev/", tty); | |
731 | if (!p) | |
732 | return -ENOMEM; | |
733 | ||
734 | tty = p; | |
735 | } else if (!path_startswith(tty, "/dev/")) | |
736 | return -ENOENT; | |
737 | ||
738 | if (lstat(tty, &st) < 0) | |
739 | return -errno; | |
740 | ||
741 | *atime = timespec_load(&st.st_atim); | |
742 | return 0; | |
743 | } | |
744 | ||
745 | static int get_process_ctty_atime(pid_t pid, usec_t *atime) { | |
746 | _cleanup_free_ char *p = NULL; | |
747 | int r; | |
748 | ||
749 | assert(pid > 0); | |
750 | assert(atime); | |
751 | ||
752 | r = get_ctty(pid, NULL, &p); | |
753 | if (r < 0) | |
754 | return r; | |
755 | ||
756 | return get_tty_atime(p, atime); | |
757 | } | |
758 | ||
759 | int session_get_idle_hint(Session *s, dual_timestamp *t) { | |
23406ce5 LP |
760 | usec_t atime = 0, n; |
761 | int r; | |
a185c5aa LP |
762 | |
763 | assert(s); | |
764 | ||
23406ce5 | 765 | /* Explicit idle hint is set */ |
a185c5aa LP |
766 | if (s->idle_hint) { |
767 | if (t) | |
768 | *t = s->idle_hint_timestamp; | |
769 | ||
770 | return s->idle_hint; | |
771 | } | |
772 | ||
0762eaa3 | 773 | /* Graphical sessions should really implement a real |
23406ce5 LP |
774 | * idle hint logic */ |
775 | if (s->display) | |
a185c5aa LP |
776 | goto dont_know; |
777 | ||
23406ce5 LP |
778 | /* For sessions with an explicitly configured tty, let's check |
779 | * its atime */ | |
780 | if (s->tty) { | |
781 | r = get_tty_atime(s->tty, &atime); | |
782 | if (r >= 0) | |
783 | goto found_atime; | |
784 | } | |
a185c5aa | 785 | |
23406ce5 LP |
786 | /* For sessions with a leader but no explicitly configured |
787 | * tty, let's check the controlling tty of the leader */ | |
788 | if (s->leader > 0) { | |
789 | r = get_process_ctty_atime(s->leader, &atime); | |
790 | if (r >= 0) | |
791 | goto found_atime; | |
a185c5aa LP |
792 | } |
793 | ||
a185c5aa LP |
794 | dont_know: |
795 | if (t) | |
796 | *t = s->idle_hint_timestamp; | |
797 | ||
798 | return 0; | |
23406ce5 LP |
799 | |
800 | found_atime: | |
801 | if (t) | |
802 | dual_timestamp_from_realtime(t, atime); | |
803 | ||
804 | n = now(CLOCK_REALTIME); | |
805 | ||
806 | if (s->manager->idle_action_usec <= 0) | |
807 | return 0; | |
808 | ||
809 | return atime + s->manager->idle_action_usec <= n; | |
a185c5aa LP |
810 | } |
811 | ||
bef422ae LP |
812 | void session_set_idle_hint(Session *s, bool b) { |
813 | assert(s); | |
814 | ||
815 | if (s->idle_hint == b) | |
816 | return; | |
817 | ||
818 | s->idle_hint = b; | |
819 | dual_timestamp_get(&s->idle_hint_timestamp); | |
9418f147 | 820 | |
cc377381 | 821 | session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
9418f147 LP |
822 | |
823 | if (s->seat) | |
cc377381 LP |
824 | seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
825 | ||
826 | user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
827 | manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
828 | } | |
829 | ||
830 | static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
831 | Session *s = userdata; | |
832 | ||
833 | assert(s); | |
834 | assert(s->fifo_fd == fd); | |
835 | ||
836 | /* EOF on the FIFO means the session died abnormally. */ | |
837 | ||
838 | session_remove_fifo(s); | |
9bb69af4 | 839 | session_stop(s, false); |
cc377381 LP |
840 | |
841 | return 1; | |
bef422ae LP |
842 | } |
843 | ||
932e3ee7 LP |
844 | int session_create_fifo(Session *s) { |
845 | int r; | |
846 | ||
31b79c2b LP |
847 | assert(s); |
848 | ||
b4f78aea | 849 | /* Create FIFO */ |
932e3ee7 | 850 | if (!s->fifo_path) { |
d2e54fae | 851 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
e6061ab2 LP |
852 | if (r < 0) |
853 | return r; | |
854 | ||
932e3ee7 LP |
855 | if (asprintf(&s->fifo_path, "/run/systemd/sessions/%s.ref", s->id) < 0) |
856 | return -ENOMEM; | |
31b79c2b | 857 | |
932e3ee7 LP |
858 | if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST) |
859 | return -errno; | |
860 | } | |
31b79c2b | 861 | |
932e3ee7 | 862 | /* Open reading side */ |
b4f78aea | 863 | if (s->fifo_fd < 0) { |
b4f78aea LP |
864 | s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY); |
865 | if (s->fifo_fd < 0) | |
866 | return -errno; | |
867 | ||
cc377381 LP |
868 | } |
869 | ||
870 | if (!s->fifo_event_source) { | |
151b9b96 | 871 | r = sd_event_add_io(s->manager->event, &s->fifo_event_source, s->fifo_fd, 0, session_dispatch_fifo, s); |
b4f78aea LP |
872 | if (r < 0) |
873 | return r; | |
874 | ||
718db961 | 875 | r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_IDLE); |
cc377381 LP |
876 | if (r < 0) |
877 | return r; | |
b4f78aea | 878 | } |
932e3ee7 LP |
879 | |
880 | /* Open writing side */ | |
881 | r = open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY); | |
882 | if (r < 0) | |
883 | return -errno; | |
31b79c2b | 884 | |
932e3ee7 LP |
885 | return r; |
886 | } | |
887 | ||
5f41d1f1 | 888 | static void session_remove_fifo(Session *s) { |
932e3ee7 LP |
889 | assert(s); |
890 | ||
03e334a1 LP |
891 | s->fifo_event_source = sd_event_source_unref(s->fifo_event_source); |
892 | s->fifo_fd = safe_close(s->fifo_fd); | |
932e3ee7 LP |
893 | |
894 | if (s->fifo_path) { | |
895 | unlink(s->fifo_path); | |
896 | free(s->fifo_path); | |
897 | s->fifo_path = NULL; | |
898 | } | |
31b79c2b LP |
899 | } |
900 | ||
cc377381 | 901 | bool session_check_gc(Session *s, bool drop_not_started) { |
20263082 LP |
902 | assert(s); |
903 | ||
4a4b033f | 904 | if (drop_not_started && !s->started) |
cc377381 | 905 | return false; |
932e3ee7 | 906 | |
9444b1f2 | 907 | if (!s->user) |
cc377381 | 908 | return false; |
9444b1f2 | 909 | |
932e3ee7 | 910 | if (s->fifo_fd >= 0) { |
5f41d1f1 | 911 | if (pipe_eof(s->fifo_fd) <= 0) |
cc377381 | 912 | return true; |
20263082 LP |
913 | } |
914 | ||
cc377381 LP |
915 | if (s->scope_job && manager_job_is_active(s->manager, s->scope_job)) |
916 | return true; | |
20263082 | 917 | |
cc377381 LP |
918 | if (s->scope && manager_unit_is_active(s->manager, s->scope)) |
919 | return true; | |
20263082 | 920 | |
cc377381 | 921 | return false; |
20263082 LP |
922 | } |
923 | ||
14c3baca LP |
924 | void session_add_to_gc_queue(Session *s) { |
925 | assert(s); | |
926 | ||
927 | if (s->in_gc_queue) | |
928 | return; | |
929 | ||
71fda00f | 930 | LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s); |
14c3baca LP |
931 | s->in_gc_queue = true; |
932 | } | |
933 | ||
0604381b LP |
934 | SessionState session_get_state(Session *s) { |
935 | assert(s); | |
936 | ||
8fe63cd4 | 937 | /* always check closing first */ |
5f41d1f1 LP |
938 | if (s->stopping || s->timer_event_source) |
939 | return SESSION_CLOSING; | |
940 | ||
8fe63cd4 | 941 | if (s->scope_job || s->fifo_fd < 0) |
405e0255 | 942 | return SESSION_OPENING; |
fb6becb4 | 943 | |
0604381b LP |
944 | if (session_is_active(s)) |
945 | return SESSION_ACTIVE; | |
946 | ||
947 | return SESSION_ONLINE; | |
948 | } | |
949 | ||
de07ab16 | 950 | int session_kill(Session *s, KillWho who, int signo) { |
de07ab16 LP |
951 | assert(s); |
952 | ||
fb6becb4 | 953 | if (!s->scope) |
de07ab16 LP |
954 | return -ESRCH; |
955 | ||
fb6becb4 | 956 | return manager_kill_unit(s->manager, s->scope, who, signo, NULL); |
de07ab16 LP |
957 | } |
958 | ||
90a18413 | 959 | static int session_open_vt(Session *s) { |
5f41d1f1 | 960 | char path[sizeof("/dev/tty") + DECIMAL_STR_MAX(s->vtnr)]; |
90a18413 | 961 | |
baccf3e4 OB |
962 | if (s->vtnr < 1) |
963 | return -ENODEV; | |
90a18413 DH |
964 | |
965 | if (s->vtfd >= 0) | |
966 | return s->vtfd; | |
967 | ||
92bd5ff3 | 968 | sprintf(path, "/dev/tty%u", s->vtnr); |
90a18413 | 969 | s->vtfd = open(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY); |
4a62c710 MS |
970 | if (s->vtfd < 0) |
971 | return log_error_errno(errno, "cannot open VT %s of session %s: %m", path, s->id); | |
90a18413 DH |
972 | |
973 | return s->vtfd; | |
974 | } | |
975 | ||
baccf3e4 | 976 | int session_prepare_vt(Session *s) { |
90a18413 DH |
977 | int vt, r; |
978 | struct vt_mode mode = { 0 }; | |
90a18413 | 979 | |
baccf3e4 OB |
980 | if (s->vtnr < 1) |
981 | return 0; | |
982 | ||
90a18413 DH |
983 | vt = session_open_vt(s); |
984 | if (vt < 0) | |
baccf3e4 | 985 | return vt; |
90a18413 | 986 | |
d6176c6c | 987 | r = fchown(vt, s->user->uid, -1); |
baccf3e4 OB |
988 | if (r < 0) { |
989 | r = -errno; | |
56f64d95 | 990 | log_error_errno(errno, "Cannot change owner of /dev/tty%u: %m", s->vtnr); |
d6176c6c | 991 | goto error; |
baccf3e4 | 992 | } |
d6176c6c | 993 | |
90a18413 | 994 | r = ioctl(vt, KDSKBMODE, K_OFF); |
baccf3e4 OB |
995 | if (r < 0) { |
996 | r = -errno; | |
56f64d95 | 997 | log_error_errno(errno, "Cannot set K_OFF on /dev/tty%u: %m", s->vtnr); |
90a18413 | 998 | goto error; |
baccf3e4 | 999 | } |
90a18413 DH |
1000 | |
1001 | r = ioctl(vt, KDSETMODE, KD_GRAPHICS); | |
baccf3e4 OB |
1002 | if (r < 0) { |
1003 | r = -errno; | |
56f64d95 | 1004 | log_error_errno(errno, "Cannot set KD_GRAPHICS on /dev/tty%u: %m", s->vtnr); |
90a18413 | 1005 | goto error; |
baccf3e4 | 1006 | } |
90a18413 | 1007 | |
90a18413 DH |
1008 | /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS. |
1009 | * So we need a dummy handler here which just acknowledges *all* VT | |
1010 | * switch requests. */ | |
1011 | mode.mode = VT_PROCESS; | |
92683ad2 DH |
1012 | mode.relsig = SIGRTMIN; |
1013 | mode.acqsig = SIGRTMIN + 1; | |
90a18413 | 1014 | r = ioctl(vt, VT_SETMODE, &mode); |
baccf3e4 OB |
1015 | if (r < 0) { |
1016 | r = -errno; | |
56f64d95 | 1017 | log_error_errno(errno, "Cannot set VT_PROCESS on /dev/tty%u: %m", s->vtnr); |
90a18413 | 1018 | goto error; |
baccf3e4 | 1019 | } |
90a18413 | 1020 | |
baccf3e4 | 1021 | return 0; |
90a18413 DH |
1022 | |
1023 | error: | |
90a18413 | 1024 | session_restore_vt(s); |
baccf3e4 | 1025 | return r; |
90a18413 DH |
1026 | } |
1027 | ||
1028 | void session_restore_vt(Session *s) { | |
a0eb2a75 | 1029 | _cleanup_free_ char *utf8 = NULL; |
90a18413 DH |
1030 | int vt, kb = K_XLATE; |
1031 | struct vt_mode mode = { 0 }; | |
1032 | ||
1033 | vt = session_open_vt(s); | |
1034 | if (vt < 0) | |
1035 | return; | |
1036 | ||
90a18413 DH |
1037 | ioctl(vt, KDSETMODE, KD_TEXT); |
1038 | ||
1039 | if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8) >= 0 && *utf8 == '1') | |
1040 | kb = K_UNICODE; | |
03e334a1 | 1041 | |
90a18413 DH |
1042 | ioctl(vt, KDSKBMODE, kb); |
1043 | ||
1044 | mode.mode = VT_AUTO; | |
1045 | ioctl(vt, VT_SETMODE, &mode); | |
1046 | ||
d6176c6c RS |
1047 | fchown(vt, 0, -1); |
1048 | ||
03e334a1 | 1049 | s->vtfd = safe_close(s->vtfd); |
90a18413 DH |
1050 | } |
1051 | ||
2ec3ff66 | 1052 | void session_leave_vt(Session *s) { |
ce540a24 DH |
1053 | int r; |
1054 | ||
2ec3ff66 DH |
1055 | assert(s); |
1056 | ||
1057 | /* This is called whenever we get a VT-switch signal from the kernel. | |
1058 | * We acknowledge all of them unconditionally. Note that session are | |
1059 | * free to overwrite those handlers and we only register them for | |
1060 | * sessions with controllers. Legacy sessions are not affected. | |
1061 | * However, if we switch from a non-legacy to a legacy session, we must | |
1062 | * make sure to pause all device before acknowledging the switch. We | |
1063 | * process the real switch only after we are notified via sysfs, so the | |
1064 | * legacy session might have already started using the devices. If we | |
1065 | * don't pause the devices before the switch, we might confuse the | |
1066 | * session we switch to. */ | |
1067 | ||
1068 | if (s->vtfd < 0) | |
1069 | return; | |
1070 | ||
1071 | session_device_pause_all(s); | |
ce540a24 DH |
1072 | r = ioctl(s->vtfd, VT_RELDISP, 1); |
1073 | if (r < 0) | |
56f64d95 | 1074 | log_debug_errno(errno, "Cannot release VT of session %s: %m", s->id); |
2ec3ff66 DH |
1075 | } |
1076 | ||
cc377381 | 1077 | bool session_is_controller(Session *s, const char *sender) { |
ae5e06bd DH |
1078 | assert(s); |
1079 | ||
1080 | return streq_ptr(s->controller, sender); | |
1081 | } | |
1082 | ||
b12e5615 DH |
1083 | static void session_release_controller(Session *s, bool notify) { |
1084 | _cleanup_free_ char *name = NULL; | |
6d33772f DH |
1085 | SessionDevice *sd; |
1086 | ||
b12e5615 DH |
1087 | if (!s->controller) |
1088 | return; | |
6d33772f | 1089 | |
b12e5615 | 1090 | name = s->controller; |
90a18413 | 1091 | |
b12e5615 DH |
1092 | /* By resetting the controller before releasing the devices, we won't |
1093 | * send notification signals. This avoids sending useless notifications | |
1094 | * if the controller is released on disconnects. */ | |
1095 | if (!notify) | |
1096 | s->controller = NULL; | |
6d33772f | 1097 | |
b12e5615 DH |
1098 | while ((sd = hashmap_first(s->devices))) |
1099 | session_device_free(sd); | |
1100 | ||
1101 | s->controller = NULL; | |
1102 | manager_drop_busname(s->manager, name); | |
6d33772f DH |
1103 | } |
1104 | ||
ae5e06bd | 1105 | int session_set_controller(Session *s, const char *sender, bool force) { |
b12e5615 | 1106 | _cleanup_free_ char *name = NULL; |
ae5e06bd DH |
1107 | int r; |
1108 | ||
1109 | assert(s); | |
1110 | assert(sender); | |
1111 | ||
1112 | if (session_is_controller(s, sender)) | |
1113 | return 0; | |
1114 | if (s->controller && !force) | |
1115 | return -EBUSY; | |
1116 | ||
b12e5615 DH |
1117 | name = strdup(sender); |
1118 | if (!name) | |
ae5e06bd DH |
1119 | return -ENOMEM; |
1120 | ||
b12e5615 DH |
1121 | r = manager_watch_busname(s->manager, name); |
1122 | if (r) | |
ae5e06bd | 1123 | return r; |
ae5e06bd | 1124 | |
90a18413 DH |
1125 | /* When setting a session controller, we forcibly mute the VT and set |
1126 | * it into graphics-mode. Applications can override that by changing | |
1127 | * VT state after calling TakeControl(). However, this serves as a good | |
1128 | * default and well-behaving controllers can now ignore VTs entirely. | |
1129 | * Note that we reset the VT on ReleaseControl() and if the controller | |
1130 | * exits. | |
1131 | * If logind crashes/restarts, we restore the controller during restart | |
1132 | * or reset the VT in case it crashed/exited, too. */ | |
baccf3e4 | 1133 | r = session_prepare_vt(s); |
13f493dc | 1134 | if (r < 0) { |
b12e5615 | 1135 | manager_drop_busname(s->manager, name); |
baccf3e4 | 1136 | return r; |
13f493dc | 1137 | } |
baccf3e4 | 1138 | |
b12e5615 DH |
1139 | session_release_controller(s, true); |
1140 | s->controller = name; | |
1141 | name = NULL; | |
1142 | session_save(s); | |
90a18413 | 1143 | |
ae5e06bd DH |
1144 | return 0; |
1145 | } | |
1146 | ||
1147 | void session_drop_controller(Session *s) { | |
1148 | assert(s); | |
1149 | ||
1150 | if (!s->controller) | |
1151 | return; | |
1152 | ||
b12e5615 DH |
1153 | session_release_controller(s, false); |
1154 | session_save(s); | |
1155 | session_restore_vt(s); | |
ae5e06bd DH |
1156 | } |
1157 | ||
fb6becb4 LP |
1158 | static const char* const session_state_table[_SESSION_STATE_MAX] = { |
1159 | [SESSION_OPENING] = "opening", | |
0604381b LP |
1160 | [SESSION_ONLINE] = "online", |
1161 | [SESSION_ACTIVE] = "active", | |
1162 | [SESSION_CLOSING] = "closing" | |
1163 | }; | |
1164 | ||
1165 | DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState); | |
1166 | ||
20263082 | 1167 | static const char* const session_type_table[_SESSION_TYPE_MAX] = { |
2c5859af | 1168 | [SESSION_UNSPECIFIED] = "unspecified", |
3f49d45a | 1169 | [SESSION_TTY] = "tty", |
98a28fef | 1170 | [SESSION_X11] = "x11", |
d9eb81f9 | 1171 | [SESSION_WAYLAND] = "wayland", |
9541666b | 1172 | [SESSION_MIR] = "mir", |
e9e74f28 | 1173 | [SESSION_WEB] = "web", |
20263082 LP |
1174 | }; |
1175 | ||
1176 | DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType); | |
de07ab16 | 1177 | |
55efac6c LP |
1178 | static const char* const session_class_table[_SESSION_CLASS_MAX] = { |
1179 | [SESSION_USER] = "user", | |
1180 | [SESSION_GREETER] = "greeter", | |
e2acb67b LP |
1181 | [SESSION_LOCK_SCREEN] = "lock-screen", |
1182 | [SESSION_BACKGROUND] = "background" | |
55efac6c LP |
1183 | }; |
1184 | ||
1185 | DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass); | |
1186 | ||
de07ab16 LP |
1187 | static const char* const kill_who_table[_KILL_WHO_MAX] = { |
1188 | [KILL_LEADER] = "leader", | |
1189 | [KILL_ALL] = "all" | |
1190 | }; | |
1191 | ||
1192 | DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); |