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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) | |
0a1beeb6 | 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 | ||
9444b1f2 | 340 | if (r < 0) { |
0a1beeb6 | 341 | log_error_errno(-r, "Failed to read %s: %m", s->state_file); |
9444b1f2 LP |
342 | return r; |
343 | } | |
344 | ||
345 | if (!s->user) { | |
346 | uid_t u; | |
347 | User *user; | |
348 | ||
349 | if (!uid) { | |
350 | log_error("UID not specified for session %s", s->id); | |
351 | return -ENOENT; | |
352 | } | |
353 | ||
354 | r = parse_uid(uid, &u); | |
355 | if (r < 0) { | |
356 | log_error("Failed to parse UID value %s for session %s.", uid, s->id); | |
357 | return r; | |
358 | } | |
359 | ||
360 | user = hashmap_get(s->manager->users, ULONG_TO_PTR((unsigned long) u)); | |
361 | if (!user) { | |
362 | log_error("User of session %s not known.", s->id); | |
363 | return -ENOENT; | |
364 | } | |
365 | ||
366 | session_set_user(s, user); | |
367 | } | |
a185c5aa LP |
368 | |
369 | if (remote) { | |
370 | k = parse_boolean(remote); | |
371 | if (k >= 0) | |
372 | s->remote = k; | |
373 | } | |
374 | ||
c506027a DH |
375 | if (vtnr) |
376 | safe_atou(vtnr, &s->vtnr); | |
377 | ||
9418f147 | 378 | if (seat && !s->seat) { |
a185c5aa LP |
379 | Seat *o; |
380 | ||
381 | o = hashmap_get(s->manager->seats, seat); | |
382 | if (o) | |
c506027a DH |
383 | r = seat_attach_session(o, s); |
384 | if (!o || r < 0) | |
385 | log_error("Cannot attach session %s to seat %s", s->id, seat); | |
a185c5aa LP |
386 | } |
387 | ||
c506027a DH |
388 | if (!s->seat || !seat_has_vts(s->seat)) |
389 | s->vtnr = 0; | |
a185c5aa | 390 | |
49e6fdbf DH |
391 | if (pos && s->seat) { |
392 | unsigned int npos; | |
393 | ||
394 | safe_atou(pos, &npos); | |
395 | seat_claim_position(s->seat, s, npos); | |
396 | } | |
397 | ||
a185c5aa | 398 | if (leader) { |
f8e2fb7b LP |
399 | k = parse_pid(leader, &s->leader); |
400 | if (k >= 0) | |
401 | audit_session_from_pid(s->leader, &s->audit_id); | |
a185c5aa LP |
402 | } |
403 | ||
a91e4e53 LP |
404 | if (type) { |
405 | SessionType t; | |
406 | ||
407 | t = session_type_from_string(type); | |
408 | if (t >= 0) | |
409 | s->type = t; | |
410 | } | |
411 | ||
55efac6c LP |
412 | if (class) { |
413 | SessionClass c; | |
414 | ||
415 | c = session_class_from_string(class); | |
416 | if (c >= 0) | |
417 | s->class = c; | |
418 | } | |
419 | ||
b4f78aea LP |
420 | if (s->fifo_path) { |
421 | int fd; | |
422 | ||
423 | /* If we open an unopened pipe for reading we will not | |
424 | get an EOF. to trigger an EOF we hence open it for | |
425 | reading, but close it right-away which then will | |
426 | trigger the EOF. */ | |
427 | ||
428 | fd = session_create_fifo(s); | |
03e334a1 | 429 | safe_close(fd); |
b4f78aea LP |
430 | } |
431 | ||
9444b1f2 LP |
432 | if (realtime) { |
433 | unsigned long long l; | |
434 | if (sscanf(realtime, "%llu", &l) > 0) | |
435 | s->timestamp.realtime = l; | |
436 | } | |
437 | ||
438 | if (monotonic) { | |
439 | unsigned long long l; | |
440 | if (sscanf(monotonic, "%llu", &l) > 0) | |
441 | s->timestamp.monotonic = l; | |
442 | } | |
a185c5aa | 443 | |
6d33772f DH |
444 | if (controller) { |
445 | if (bus_name_has_owner(s->manager->bus, controller, NULL) > 0) | |
446 | session_set_controller(s, controller, false); | |
90a18413 DH |
447 | else |
448 | session_restore_vt(s); | |
6d33772f DH |
449 | } |
450 | ||
a185c5aa | 451 | return r; |
20263082 LP |
452 | } |
453 | ||
454 | int session_activate(Session *s) { | |
d7bd01b5 DH |
455 | unsigned int num_pending; |
456 | ||
20263082 | 457 | assert(s); |
9444b1f2 | 458 | assert(s->user); |
20263082 | 459 | |
20263082 LP |
460 | if (!s->seat) |
461 | return -ENOTSUP; | |
462 | ||
463 | if (s->seat->active == s) | |
464 | return 0; | |
465 | ||
d7bd01b5 DH |
466 | /* on seats with VTs, we let VTs manage session-switching */ |
467 | if (seat_has_vts(s->seat)) { | |
92bd5ff3 | 468 | if (!s->vtnr) |
d7bd01b5 DH |
469 | return -ENOTSUP; |
470 | ||
471 | return chvt(s->vtnr); | |
472 | } | |
473 | ||
474 | /* On seats without VTs, we implement session-switching in logind. We | |
475 | * try to pause all session-devices and wait until the session | |
476 | * controller acknowledged them. Once all devices are asleep, we simply | |
477 | * switch the active session and be done. | |
478 | * We save the session we want to switch to in seat->pending_switch and | |
479 | * seat_complete_switch() will perform the final switch. */ | |
480 | ||
481 | s->seat->pending_switch = s; | |
482 | ||
483 | /* if no devices are running, immediately perform the session switch */ | |
484 | num_pending = session_device_try_pause_all(s); | |
485 | if (!num_pending) | |
486 | seat_complete_switch(s->seat); | |
20263082 | 487 | |
d7bd01b5 | 488 | return 0; |
20263082 LP |
489 | } |
490 | ||
fb6becb4 | 491 | static int session_start_scope(Session *s) { |
98a28fef LP |
492 | int r; |
493 | ||
494 | assert(s); | |
9444b1f2 | 495 | assert(s->user); |
fb6becb4 | 496 | assert(s->user->slice); |
98a28fef | 497 | |
fb6becb4 | 498 | if (!s->scope) { |
cc377381 | 499 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
d0af76e6 | 500 | _cleanup_free_ char *description = NULL; |
39883f62 | 501 | char *scope, *job = NULL; |
d0af76e6 | 502 | |
405e0255 LP |
503 | description = strjoin("Session ", s->id, " of user ", s->user->name, NULL); |
504 | if (!description) | |
505 | return log_oom(); | |
506 | ||
d0af76e6 LP |
507 | scope = strjoin("session-", s->id, ".scope", NULL); |
508 | if (!scope) | |
ae018d9b LP |
509 | return log_oom(); |
510 | ||
646e392e | 511 | r = manager_start_scope(s->manager, scope, s->leader, s->user->slice, description, "systemd-logind.service", "systemd-user-sessions.service", &error, &job); |
d0af76e6 | 512 | if (r < 0) { |
042f5988 | 513 | log_error("Failed to start session scope %s: %s %s", |
cc377381 | 514 | scope, bus_error_message(&error, r), error.name); |
d0af76e6 | 515 | free(scope); |
f2d4f98d | 516 | return r; |
d0af76e6 LP |
517 | } else { |
518 | s->scope = scope; | |
519 | ||
520 | free(s->scope_job); | |
521 | s->scope_job = job; | |
522 | } | |
20263082 LP |
523 | } |
524 | ||
d0af76e6 LP |
525 | if (s->scope) |
526 | hashmap_put(s->manager->session_units, s->scope, s); | |
527 | ||
20263082 LP |
528 | return 0; |
529 | } | |
530 | ||
531 | int session_start(Session *s) { | |
532 | int r; | |
533 | ||
534 | assert(s); | |
9444b1f2 LP |
535 | |
536 | if (!s->user) | |
537 | return -ESTALE; | |
20263082 | 538 | |
9418f147 LP |
539 | if (s->started) |
540 | return 0; | |
541 | ||
ed18b08b LP |
542 | r = user_start(s->user); |
543 | if (r < 0) | |
544 | return r; | |
545 | ||
fb6becb4 LP |
546 | /* Create cgroup */ |
547 | r = session_start_scope(s); | |
548 | if (r < 0) | |
549 | return r; | |
550 | ||
d9eb81f9 | 551 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 552 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_START), |
877d54e9 LP |
553 | "SESSION_ID=%s", s->id, |
554 | "USER_ID=%s", s->user->name, | |
de0671ee | 555 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 556 | LOG_MESSAGE("New session %s of user %s.", s->id, s->user->name), |
877d54e9 | 557 | NULL); |
98a28fef | 558 | |
9444b1f2 LP |
559 | if (!dual_timestamp_is_set(&s->timestamp)) |
560 | dual_timestamp_get(&s->timestamp); | |
14c3baca | 561 | |
e9816c48 LP |
562 | if (s->seat) |
563 | seat_read_active_vt(s->seat); | |
564 | ||
9418f147 LP |
565 | s->started = true; |
566 | ||
952d3260 LP |
567 | user_elect_display(s->user); |
568 | ||
5f41d1f1 | 569 | /* Save data */ |
e9816c48 | 570 | session_save(s); |
7f7bb946 | 571 | user_save(s->user); |
5f41d1f1 LP |
572 | if (s->seat) |
573 | seat_save(s->seat); | |
e9816c48 | 574 | |
5f41d1f1 | 575 | /* Send signals */ |
da119395 | 576 | session_send_signal(s, true); |
952d3260 | 577 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 LP |
578 | if (s->seat) { |
579 | if (s->seat->active == s) | |
cc377381 | 580 | seat_send_changed(s->seat, "Sessions", "ActiveSession", NULL); |
9418f147 | 581 | else |
cc377381 | 582 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
583 | } |
584 | ||
20263082 LP |
585 | return 0; |
586 | } | |
587 | ||
9bb69af4 | 588 | static int session_stop_scope(Session *s, bool force) { |
cc377381 | 589 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
39883f62 | 590 | char *job = NULL; |
20263082 | 591 | int r; |
20263082 LP |
592 | |
593 | assert(s); | |
594 | ||
fb6becb4 LP |
595 | if (!s->scope) |
596 | return 0; | |
9b221b63 | 597 | |
9bb69af4 | 598 | if (force || manager_shall_kill(s->manager, s->user->name)) { |
5f41d1f1 LP |
599 | r = manager_stop_unit(s->manager, s->scope, &error, &job); |
600 | if (r < 0) { | |
601 | log_error("Failed to stop session scope: %s", bus_error_message(&error, r)); | |
602 | return r; | |
603 | } | |
20263082 | 604 | |
5f41d1f1 LP |
605 | free(s->scope_job); |
606 | s->scope_job = job; | |
607 | } else { | |
608 | r = manager_abandon_scope(s->manager, s->scope, &error); | |
609 | if (r < 0) { | |
610 | log_error("Failed to abandon session scope: %s", bus_error_message(&error, r)); | |
611 | return r; | |
612 | } | |
613 | } | |
20263082 | 614 | |
9b221b63 | 615 | return 0; |
20263082 LP |
616 | } |
617 | ||
9bb69af4 | 618 | int session_stop(Session *s, bool force) { |
405e0255 LP |
619 | int r; |
620 | ||
621 | assert(s); | |
622 | ||
623 | if (!s->user) | |
624 | return -ESTALE; | |
625 | ||
5f41d1f1 LP |
626 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
627 | ||
628 | /* We are going down, don't care about FIFOs anymore */ | |
629 | session_remove_fifo(s); | |
630 | ||
405e0255 | 631 | /* Kill cgroup */ |
9bb69af4 | 632 | r = session_stop_scope(s, force); |
405e0255 | 633 | |
5f41d1f1 LP |
634 | s->stopping = true; |
635 | ||
952d3260 LP |
636 | user_elect_display(s->user); |
637 | ||
405e0255 | 638 | session_save(s); |
cc377381 | 639 | user_save(s->user); |
405e0255 LP |
640 | |
641 | return r; | |
642 | } | |
643 | ||
644 | int session_finalize(Session *s) { | |
645 | int r = 0; | |
118ecf32 | 646 | SessionDevice *sd; |
20263082 LP |
647 | |
648 | assert(s); | |
649 | ||
9444b1f2 LP |
650 | if (!s->user) |
651 | return -ESTALE; | |
652 | ||
ed18b08b | 653 | if (s->started) |
d9eb81f9 | 654 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 655 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_STOP), |
877d54e9 LP |
656 | "SESSION_ID=%s", s->id, |
657 | "USER_ID=%s", s->user->name, | |
de0671ee | 658 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 659 | LOG_MESSAGE("Removed session %s.", s->id), |
877d54e9 | 660 | NULL); |
98a28fef | 661 | |
5f41d1f1 LP |
662 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
663 | ||
118ecf32 DH |
664 | /* Kill session devices */ |
665 | while ((sd = hashmap_first(s->devices))) | |
666 | session_device_free(sd); | |
667 | ||
d2f92cdf LP |
668 | unlink(s->state_file); |
669 | session_add_to_gc_queue(s); | |
ed18b08b | 670 | user_add_to_gc_queue(s->user); |
14c3baca | 671 | |
405e0255 | 672 | if (s->started) { |
ed18b08b | 673 | session_send_signal(s, false); |
405e0255 LP |
674 | s->started = false; |
675 | } | |
50fb9793 | 676 | |
9418f147 LP |
677 | if (s->seat) { |
678 | if (s->seat->active == s) | |
679 | seat_set_active(s->seat, NULL); | |
680 | ||
23bd3b62 | 681 | seat_save(s->seat); |
5f41d1f1 | 682 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
683 | } |
684 | ||
23bd3b62 | 685 | user_save(s->user); |
952d3260 | 686 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 | 687 | |
20263082 LP |
688 | return r; |
689 | } | |
690 | ||
5f41d1f1 LP |
691 | static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { |
692 | Session *s = userdata; | |
693 | ||
694 | assert(es); | |
695 | assert(s); | |
696 | ||
9bb69af4 | 697 | session_stop(s, false); |
5f41d1f1 LP |
698 | return 0; |
699 | } | |
700 | ||
701 | void session_release(Session *s) { | |
702 | assert(s); | |
703 | ||
704 | if (!s->started || s->stopping) | |
705 | return; | |
706 | ||
707 | if (!s->timer_event_source) | |
6a0f1f6d LP |
708 | sd_event_add_time(s->manager->event, |
709 | &s->timer_event_source, | |
710 | CLOCK_MONOTONIC, | |
711 | now(CLOCK_MONOTONIC) + RELEASE_USEC, 0, | |
712 | release_timeout_callback, s); | |
5f41d1f1 LP |
713 | } |
714 | ||
20263082 LP |
715 | bool session_is_active(Session *s) { |
716 | assert(s); | |
717 | ||
718 | if (!s->seat) | |
719 | return true; | |
720 | ||
721 | return s->seat->active == s; | |
722 | } | |
723 | ||
23406ce5 LP |
724 | static int get_tty_atime(const char *tty, usec_t *atime) { |
725 | _cleanup_free_ char *p = NULL; | |
a185c5aa | 726 | struct stat st; |
23406ce5 LP |
727 | |
728 | assert(tty); | |
729 | assert(atime); | |
730 | ||
731 | if (!path_is_absolute(tty)) { | |
732 | p = strappend("/dev/", tty); | |
733 | if (!p) | |
734 | return -ENOMEM; | |
735 | ||
736 | tty = p; | |
737 | } else if (!path_startswith(tty, "/dev/")) | |
738 | return -ENOENT; | |
739 | ||
740 | if (lstat(tty, &st) < 0) | |
741 | return -errno; | |
742 | ||
743 | *atime = timespec_load(&st.st_atim); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | static int get_process_ctty_atime(pid_t pid, usec_t *atime) { | |
748 | _cleanup_free_ char *p = NULL; | |
749 | int r; | |
750 | ||
751 | assert(pid > 0); | |
752 | assert(atime); | |
753 | ||
754 | r = get_ctty(pid, NULL, &p); | |
755 | if (r < 0) | |
756 | return r; | |
757 | ||
758 | return get_tty_atime(p, atime); | |
759 | } | |
760 | ||
761 | int session_get_idle_hint(Session *s, dual_timestamp *t) { | |
23406ce5 LP |
762 | usec_t atime = 0, n; |
763 | int r; | |
a185c5aa LP |
764 | |
765 | assert(s); | |
766 | ||
23406ce5 | 767 | /* Explicit idle hint is set */ |
a185c5aa LP |
768 | if (s->idle_hint) { |
769 | if (t) | |
770 | *t = s->idle_hint_timestamp; | |
771 | ||
772 | return s->idle_hint; | |
773 | } | |
774 | ||
0762eaa3 | 775 | /* Graphical sessions should really implement a real |
23406ce5 LP |
776 | * idle hint logic */ |
777 | if (s->display) | |
a185c5aa LP |
778 | goto dont_know; |
779 | ||
23406ce5 LP |
780 | /* For sessions with an explicitly configured tty, let's check |
781 | * its atime */ | |
782 | if (s->tty) { | |
783 | r = get_tty_atime(s->tty, &atime); | |
784 | if (r >= 0) | |
785 | goto found_atime; | |
786 | } | |
a185c5aa | 787 | |
23406ce5 LP |
788 | /* For sessions with a leader but no explicitly configured |
789 | * tty, let's check the controlling tty of the leader */ | |
790 | if (s->leader > 0) { | |
791 | r = get_process_ctty_atime(s->leader, &atime); | |
792 | if (r >= 0) | |
793 | goto found_atime; | |
a185c5aa LP |
794 | } |
795 | ||
a185c5aa LP |
796 | dont_know: |
797 | if (t) | |
798 | *t = s->idle_hint_timestamp; | |
799 | ||
800 | return 0; | |
23406ce5 LP |
801 | |
802 | found_atime: | |
803 | if (t) | |
804 | dual_timestamp_from_realtime(t, atime); | |
805 | ||
806 | n = now(CLOCK_REALTIME); | |
807 | ||
808 | if (s->manager->idle_action_usec <= 0) | |
809 | return 0; | |
810 | ||
811 | return atime + s->manager->idle_action_usec <= n; | |
a185c5aa LP |
812 | } |
813 | ||
bef422ae LP |
814 | void session_set_idle_hint(Session *s, bool b) { |
815 | assert(s); | |
816 | ||
817 | if (s->idle_hint == b) | |
818 | return; | |
819 | ||
820 | s->idle_hint = b; | |
821 | dual_timestamp_get(&s->idle_hint_timestamp); | |
9418f147 | 822 | |
cc377381 | 823 | session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
9418f147 LP |
824 | |
825 | if (s->seat) | |
cc377381 LP |
826 | seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
827 | ||
828 | user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
829 | manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
830 | } | |
831 | ||
832 | static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
833 | Session *s = userdata; | |
834 | ||
835 | assert(s); | |
836 | assert(s->fifo_fd == fd); | |
837 | ||
838 | /* EOF on the FIFO means the session died abnormally. */ | |
839 | ||
840 | session_remove_fifo(s); | |
9bb69af4 | 841 | session_stop(s, false); |
cc377381 LP |
842 | |
843 | return 1; | |
bef422ae LP |
844 | } |
845 | ||
932e3ee7 LP |
846 | int session_create_fifo(Session *s) { |
847 | int r; | |
848 | ||
31b79c2b LP |
849 | assert(s); |
850 | ||
b4f78aea | 851 | /* Create FIFO */ |
932e3ee7 | 852 | if (!s->fifo_path) { |
d2e54fae | 853 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
e6061ab2 LP |
854 | if (r < 0) |
855 | return r; | |
856 | ||
932e3ee7 LP |
857 | if (asprintf(&s->fifo_path, "/run/systemd/sessions/%s.ref", s->id) < 0) |
858 | return -ENOMEM; | |
31b79c2b | 859 | |
932e3ee7 LP |
860 | if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST) |
861 | return -errno; | |
862 | } | |
31b79c2b | 863 | |
932e3ee7 | 864 | /* Open reading side */ |
b4f78aea | 865 | if (s->fifo_fd < 0) { |
b4f78aea LP |
866 | s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY); |
867 | if (s->fifo_fd < 0) | |
868 | return -errno; | |
869 | ||
cc377381 LP |
870 | } |
871 | ||
872 | if (!s->fifo_event_source) { | |
151b9b96 | 873 | r = sd_event_add_io(s->manager->event, &s->fifo_event_source, s->fifo_fd, 0, session_dispatch_fifo, s); |
b4f78aea LP |
874 | if (r < 0) |
875 | return r; | |
876 | ||
718db961 | 877 | r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_IDLE); |
cc377381 LP |
878 | if (r < 0) |
879 | return r; | |
b4f78aea | 880 | } |
932e3ee7 LP |
881 | |
882 | /* Open writing side */ | |
883 | r = open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY); | |
884 | if (r < 0) | |
885 | return -errno; | |
31b79c2b | 886 | |
932e3ee7 LP |
887 | return r; |
888 | } | |
889 | ||
5f41d1f1 | 890 | static void session_remove_fifo(Session *s) { |
932e3ee7 LP |
891 | assert(s); |
892 | ||
03e334a1 LP |
893 | s->fifo_event_source = sd_event_source_unref(s->fifo_event_source); |
894 | s->fifo_fd = safe_close(s->fifo_fd); | |
932e3ee7 LP |
895 | |
896 | if (s->fifo_path) { | |
897 | unlink(s->fifo_path); | |
898 | free(s->fifo_path); | |
899 | s->fifo_path = NULL; | |
900 | } | |
31b79c2b LP |
901 | } |
902 | ||
cc377381 | 903 | bool session_check_gc(Session *s, bool drop_not_started) { |
20263082 LP |
904 | assert(s); |
905 | ||
4a4b033f | 906 | if (drop_not_started && !s->started) |
cc377381 | 907 | return false; |
932e3ee7 | 908 | |
9444b1f2 | 909 | if (!s->user) |
cc377381 | 910 | return false; |
9444b1f2 | 911 | |
932e3ee7 | 912 | if (s->fifo_fd >= 0) { |
5f41d1f1 | 913 | if (pipe_eof(s->fifo_fd) <= 0) |
cc377381 | 914 | return true; |
20263082 LP |
915 | } |
916 | ||
cc377381 LP |
917 | if (s->scope_job && manager_job_is_active(s->manager, s->scope_job)) |
918 | return true; | |
20263082 | 919 | |
cc377381 LP |
920 | if (s->scope && manager_unit_is_active(s->manager, s->scope)) |
921 | return true; | |
20263082 | 922 | |
cc377381 | 923 | return false; |
20263082 LP |
924 | } |
925 | ||
14c3baca LP |
926 | void session_add_to_gc_queue(Session *s) { |
927 | assert(s); | |
928 | ||
929 | if (s->in_gc_queue) | |
930 | return; | |
931 | ||
71fda00f | 932 | LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s); |
14c3baca LP |
933 | s->in_gc_queue = true; |
934 | } | |
935 | ||
0604381b LP |
936 | SessionState session_get_state(Session *s) { |
937 | assert(s); | |
938 | ||
8fe63cd4 | 939 | /* always check closing first */ |
5f41d1f1 LP |
940 | if (s->stopping || s->timer_event_source) |
941 | return SESSION_CLOSING; | |
942 | ||
8fe63cd4 | 943 | if (s->scope_job || s->fifo_fd < 0) |
405e0255 | 944 | return SESSION_OPENING; |
fb6becb4 | 945 | |
0604381b LP |
946 | if (session_is_active(s)) |
947 | return SESSION_ACTIVE; | |
948 | ||
949 | return SESSION_ONLINE; | |
950 | } | |
951 | ||
de07ab16 | 952 | int session_kill(Session *s, KillWho who, int signo) { |
de07ab16 LP |
953 | assert(s); |
954 | ||
fb6becb4 | 955 | if (!s->scope) |
de07ab16 LP |
956 | return -ESRCH; |
957 | ||
fb6becb4 | 958 | return manager_kill_unit(s->manager, s->scope, who, signo, NULL); |
de07ab16 LP |
959 | } |
960 | ||
90a18413 | 961 | static int session_open_vt(Session *s) { |
5f41d1f1 | 962 | char path[sizeof("/dev/tty") + DECIMAL_STR_MAX(s->vtnr)]; |
90a18413 | 963 | |
baccf3e4 OB |
964 | if (s->vtnr < 1) |
965 | return -ENODEV; | |
90a18413 DH |
966 | |
967 | if (s->vtfd >= 0) | |
968 | return s->vtfd; | |
969 | ||
92bd5ff3 | 970 | sprintf(path, "/dev/tty%u", s->vtnr); |
90a18413 DH |
971 | s->vtfd = open(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY); |
972 | if (s->vtfd < 0) { | |
973 | log_error("cannot open VT %s of session %s: %m", path, s->id); | |
03e334a1 | 974 | return -errno; |
90a18413 DH |
975 | } |
976 | ||
977 | return s->vtfd; | |
978 | } | |
979 | ||
baccf3e4 | 980 | int session_prepare_vt(Session *s) { |
90a18413 DH |
981 | int vt, r; |
982 | struct vt_mode mode = { 0 }; | |
90a18413 | 983 | |
baccf3e4 OB |
984 | if (s->vtnr < 1) |
985 | return 0; | |
986 | ||
90a18413 DH |
987 | vt = session_open_vt(s); |
988 | if (vt < 0) | |
baccf3e4 | 989 | return vt; |
90a18413 | 990 | |
d6176c6c | 991 | r = fchown(vt, s->user->uid, -1); |
baccf3e4 OB |
992 | if (r < 0) { |
993 | r = -errno; | |
994 | log_error("Cannot change owner of /dev/tty%u: %m", s->vtnr); | |
d6176c6c | 995 | goto error; |
baccf3e4 | 996 | } |
d6176c6c | 997 | |
90a18413 | 998 | r = ioctl(vt, KDSKBMODE, K_OFF); |
baccf3e4 OB |
999 | if (r < 0) { |
1000 | r = -errno; | |
1001 | log_error("Cannot set K_OFF on /dev/tty%u: %m", s->vtnr); | |
90a18413 | 1002 | goto error; |
baccf3e4 | 1003 | } |
90a18413 DH |
1004 | |
1005 | r = ioctl(vt, KDSETMODE, KD_GRAPHICS); | |
baccf3e4 OB |
1006 | if (r < 0) { |
1007 | r = -errno; | |
1008 | log_error("Cannot set KD_GRAPHICS on /dev/tty%u: %m", s->vtnr); | |
90a18413 | 1009 | goto error; |
baccf3e4 | 1010 | } |
90a18413 | 1011 | |
90a18413 DH |
1012 | /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS. |
1013 | * So we need a dummy handler here which just acknowledges *all* VT | |
1014 | * switch requests. */ | |
1015 | mode.mode = VT_PROCESS; | |
92683ad2 DH |
1016 | mode.relsig = SIGRTMIN; |
1017 | mode.acqsig = SIGRTMIN + 1; | |
90a18413 | 1018 | r = ioctl(vt, VT_SETMODE, &mode); |
baccf3e4 OB |
1019 | if (r < 0) { |
1020 | r = -errno; | |
1021 | log_error("Cannot set VT_PROCESS on /dev/tty%u: %m", s->vtnr); | |
90a18413 | 1022 | goto error; |
baccf3e4 | 1023 | } |
90a18413 | 1024 | |
baccf3e4 | 1025 | return 0; |
90a18413 DH |
1026 | |
1027 | error: | |
90a18413 | 1028 | session_restore_vt(s); |
baccf3e4 | 1029 | return r; |
90a18413 DH |
1030 | } |
1031 | ||
1032 | void session_restore_vt(Session *s) { | |
a0eb2a75 | 1033 | _cleanup_free_ char *utf8 = NULL; |
90a18413 DH |
1034 | int vt, kb = K_XLATE; |
1035 | struct vt_mode mode = { 0 }; | |
1036 | ||
1037 | vt = session_open_vt(s); | |
1038 | if (vt < 0) | |
1039 | return; | |
1040 | ||
90a18413 DH |
1041 | ioctl(vt, KDSETMODE, KD_TEXT); |
1042 | ||
1043 | if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8) >= 0 && *utf8 == '1') | |
1044 | kb = K_UNICODE; | |
03e334a1 | 1045 | |
90a18413 DH |
1046 | ioctl(vt, KDSKBMODE, kb); |
1047 | ||
1048 | mode.mode = VT_AUTO; | |
1049 | ioctl(vt, VT_SETMODE, &mode); | |
1050 | ||
d6176c6c RS |
1051 | fchown(vt, 0, -1); |
1052 | ||
03e334a1 | 1053 | s->vtfd = safe_close(s->vtfd); |
90a18413 DH |
1054 | } |
1055 | ||
2ec3ff66 | 1056 | void session_leave_vt(Session *s) { |
ce540a24 DH |
1057 | int r; |
1058 | ||
2ec3ff66 DH |
1059 | assert(s); |
1060 | ||
1061 | /* This is called whenever we get a VT-switch signal from the kernel. | |
1062 | * We acknowledge all of them unconditionally. Note that session are | |
1063 | * free to overwrite those handlers and we only register them for | |
1064 | * sessions with controllers. Legacy sessions are not affected. | |
1065 | * However, if we switch from a non-legacy to a legacy session, we must | |
1066 | * make sure to pause all device before acknowledging the switch. We | |
1067 | * process the real switch only after we are notified via sysfs, so the | |
1068 | * legacy session might have already started using the devices. If we | |
1069 | * don't pause the devices before the switch, we might confuse the | |
1070 | * session we switch to. */ | |
1071 | ||
1072 | if (s->vtfd < 0) | |
1073 | return; | |
1074 | ||
1075 | session_device_pause_all(s); | |
ce540a24 DH |
1076 | r = ioctl(s->vtfd, VT_RELDISP, 1); |
1077 | if (r < 0) | |
1078 | log_debug("Cannot release VT of session %s: %m", s->id); | |
2ec3ff66 DH |
1079 | } |
1080 | ||
cc377381 | 1081 | bool session_is_controller(Session *s, const char *sender) { |
ae5e06bd DH |
1082 | assert(s); |
1083 | ||
1084 | return streq_ptr(s->controller, sender); | |
1085 | } | |
1086 | ||
b12e5615 DH |
1087 | static void session_release_controller(Session *s, bool notify) { |
1088 | _cleanup_free_ char *name = NULL; | |
6d33772f DH |
1089 | SessionDevice *sd; |
1090 | ||
b12e5615 DH |
1091 | if (!s->controller) |
1092 | return; | |
6d33772f | 1093 | |
b12e5615 | 1094 | name = s->controller; |
90a18413 | 1095 | |
b12e5615 DH |
1096 | /* By resetting the controller before releasing the devices, we won't |
1097 | * send notification signals. This avoids sending useless notifications | |
1098 | * if the controller is released on disconnects. */ | |
1099 | if (!notify) | |
1100 | s->controller = NULL; | |
6d33772f | 1101 | |
b12e5615 DH |
1102 | while ((sd = hashmap_first(s->devices))) |
1103 | session_device_free(sd); | |
1104 | ||
1105 | s->controller = NULL; | |
1106 | manager_drop_busname(s->manager, name); | |
6d33772f DH |
1107 | } |
1108 | ||
ae5e06bd | 1109 | int session_set_controller(Session *s, const char *sender, bool force) { |
b12e5615 | 1110 | _cleanup_free_ char *name = NULL; |
ae5e06bd DH |
1111 | int r; |
1112 | ||
1113 | assert(s); | |
1114 | assert(sender); | |
1115 | ||
1116 | if (session_is_controller(s, sender)) | |
1117 | return 0; | |
1118 | if (s->controller && !force) | |
1119 | return -EBUSY; | |
1120 | ||
b12e5615 DH |
1121 | name = strdup(sender); |
1122 | if (!name) | |
ae5e06bd DH |
1123 | return -ENOMEM; |
1124 | ||
b12e5615 DH |
1125 | r = manager_watch_busname(s->manager, name); |
1126 | if (r) | |
ae5e06bd | 1127 | return r; |
ae5e06bd | 1128 | |
90a18413 DH |
1129 | /* When setting a session controller, we forcibly mute the VT and set |
1130 | * it into graphics-mode. Applications can override that by changing | |
1131 | * VT state after calling TakeControl(). However, this serves as a good | |
1132 | * default and well-behaving controllers can now ignore VTs entirely. | |
1133 | * Note that we reset the VT on ReleaseControl() and if the controller | |
1134 | * exits. | |
1135 | * If logind crashes/restarts, we restore the controller during restart | |
1136 | * or reset the VT in case it crashed/exited, too. */ | |
baccf3e4 | 1137 | r = session_prepare_vt(s); |
13f493dc | 1138 | if (r < 0) { |
b12e5615 | 1139 | manager_drop_busname(s->manager, name); |
baccf3e4 | 1140 | return r; |
13f493dc | 1141 | } |
baccf3e4 | 1142 | |
b12e5615 DH |
1143 | session_release_controller(s, true); |
1144 | s->controller = name; | |
1145 | name = NULL; | |
1146 | session_save(s); | |
90a18413 | 1147 | |
ae5e06bd DH |
1148 | return 0; |
1149 | } | |
1150 | ||
1151 | void session_drop_controller(Session *s) { | |
1152 | assert(s); | |
1153 | ||
1154 | if (!s->controller) | |
1155 | return; | |
1156 | ||
b12e5615 DH |
1157 | session_release_controller(s, false); |
1158 | session_save(s); | |
1159 | session_restore_vt(s); | |
ae5e06bd DH |
1160 | } |
1161 | ||
fb6becb4 LP |
1162 | static const char* const session_state_table[_SESSION_STATE_MAX] = { |
1163 | [SESSION_OPENING] = "opening", | |
0604381b LP |
1164 | [SESSION_ONLINE] = "online", |
1165 | [SESSION_ACTIVE] = "active", | |
1166 | [SESSION_CLOSING] = "closing" | |
1167 | }; | |
1168 | ||
1169 | DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState); | |
1170 | ||
20263082 | 1171 | static const char* const session_type_table[_SESSION_TYPE_MAX] = { |
2c5859af | 1172 | [SESSION_UNSPECIFIED] = "unspecified", |
3f49d45a | 1173 | [SESSION_TTY] = "tty", |
98a28fef | 1174 | [SESSION_X11] = "x11", |
d9eb81f9 | 1175 | [SESSION_WAYLAND] = "wayland", |
9541666b | 1176 | [SESSION_MIR] = "mir", |
e9e74f28 | 1177 | [SESSION_WEB] = "web", |
20263082 LP |
1178 | }; |
1179 | ||
1180 | DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType); | |
de07ab16 | 1181 | |
55efac6c LP |
1182 | static const char* const session_class_table[_SESSION_CLASS_MAX] = { |
1183 | [SESSION_USER] = "user", | |
1184 | [SESSION_GREETER] = "greeter", | |
e2acb67b LP |
1185 | [SESSION_LOCK_SCREEN] = "lock-screen", |
1186 | [SESSION_BACKGROUND] = "background" | |
55efac6c LP |
1187 | }; |
1188 | ||
1189 | DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass); | |
1190 | ||
de07ab16 LP |
1191 | static const char* const kill_who_table[_KILL_WHO_MAX] = { |
1192 | [KILL_LEADER] = "leader", | |
1193 | [KILL_ALL] = "all" | |
1194 | }; | |
1195 | ||
1196 | DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); |