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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 | 31 | #include "sd-messages.h" |
20263082 | 32 | #include "util.h" |
49e942b2 | 33 | #include "mkdir.h" |
9eb977db | 34 | #include "path-util.h" |
a5c32cff | 35 | #include "fileio.h" |
cc377381 LP |
36 | #include "audit.h" |
37 | #include "bus-util.h" | |
38 | #include "bus-error.h" | |
fb6becb4 | 39 | #include "logind-session.h" |
6482f626 | 40 | #include "formats-util.h" |
288a74cc | 41 | #include "terminal-util.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) |
dacd6cee | 168 | goto fail; |
20263082 | 169 | |
14c3baca LP |
170 | r = fopen_temporary(s->state_file, &f, &temp_path); |
171 | if (r < 0) | |
dacd6cee | 172 | goto fail; |
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; | |
dacd6cee | 220 | goto fail; |
558c6490 LP |
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; | |
dacd6cee | 232 | goto fail; |
558c6490 LP |
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; | |
dacd6cee | 244 | goto fail; |
558c6490 LP |
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; | |
dacd6cee | 257 | goto fail; |
558c6490 LP |
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 | 266 | if (!s->vtnr) |
e6494a07 | 267 | fprintf(f, "POSITION=%u\n", s->position); |
49e6fdbf | 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 | ||
dacd6cee LP |
285 | r = fflush_and_check(f); |
286 | if (r < 0) | |
287 | goto fail; | |
14c3baca | 288 | |
dacd6cee | 289 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 290 | r = -errno; |
dacd6cee | 291 | goto fail; |
20263082 LP |
292 | } |
293 | ||
dacd6cee LP |
294 | return 0; |
295 | ||
296 | fail: | |
297 | (void) unlink(s->state_file); | |
14c3baca | 298 | |
dacd6cee LP |
299 | if (temp_path) |
300 | (void) unlink(temp_path); | |
301 | ||
302 | return log_error_errno(r, "Failed to save session data %s: %m", s->state_file); | |
20263082 LP |
303 | } |
304 | ||
dacd6cee | 305 | |
20263082 | 306 | int session_load(Session *s) { |
9444b1f2 | 307 | _cleanup_free_ char *remote = NULL, |
a185c5aa LP |
308 | *seat = NULL, |
309 | *vtnr = NULL, | |
be94d954 | 310 | *state = NULL, |
e6494a07 | 311 | *position = NULL, |
a185c5aa | 312 | *leader = NULL, |
55efac6c | 313 | *type = NULL, |
9444b1f2 LP |
314 | *class = NULL, |
315 | *uid = NULL, | |
316 | *realtime = NULL, | |
6d33772f DH |
317 | *monotonic = NULL, |
318 | *controller = NULL; | |
a185c5aa LP |
319 | |
320 | int k, r; | |
321 | ||
20263082 LP |
322 | assert(s); |
323 | ||
a185c5aa LP |
324 | r = parse_env_file(s->state_file, NEWLINE, |
325 | "REMOTE", &remote, | |
fb6becb4 LP |
326 | "SCOPE", &s->scope, |
327 | "SCOPE_JOB", &s->scope_job, | |
932e3ee7 | 328 | "FIFO", &s->fifo_path, |
a185c5aa LP |
329 | "SEAT", &seat, |
330 | "TTY", &s->tty, | |
331 | "DISPLAY", &s->display, | |
332 | "REMOTE_HOST", &s->remote_host, | |
333 | "REMOTE_USER", &s->remote_user, | |
98a28fef | 334 | "SERVICE", &s->service, |
a4cd87e9 | 335 | "DESKTOP", &s->desktop, |
a185c5aa | 336 | "VTNR", &vtnr, |
be94d954 | 337 | "STATE", &state, |
e6494a07 | 338 | "POSITION", &position, |
a185c5aa | 339 | "LEADER", &leader, |
a91e4e53 | 340 | "TYPE", &type, |
55efac6c | 341 | "CLASS", &class, |
9444b1f2 LP |
342 | "UID", &uid, |
343 | "REALTIME", &realtime, | |
344 | "MONOTONIC", &monotonic, | |
6d33772f | 345 | "CONTROLLER", &controller, |
a185c5aa LP |
346 | NULL); |
347 | ||
f647962d MS |
348 | if (r < 0) |
349 | return log_error_errno(r, "Failed to read %s: %m", s->state_file); | |
9444b1f2 LP |
350 | |
351 | if (!s->user) { | |
352 | uid_t u; | |
353 | User *user; | |
354 | ||
355 | if (!uid) { | |
356 | log_error("UID not specified for session %s", s->id); | |
357 | return -ENOENT; | |
358 | } | |
359 | ||
360 | r = parse_uid(uid, &u); | |
361 | if (r < 0) { | |
362 | log_error("Failed to parse UID value %s for session %s.", uid, s->id); | |
363 | return r; | |
364 | } | |
365 | ||
8cb4ab00 | 366 | user = hashmap_get(s->manager->users, UID_TO_PTR(u)); |
9444b1f2 LP |
367 | if (!user) { |
368 | log_error("User of session %s not known.", s->id); | |
369 | return -ENOENT; | |
370 | } | |
371 | ||
372 | session_set_user(s, user); | |
373 | } | |
a185c5aa LP |
374 | |
375 | if (remote) { | |
376 | k = parse_boolean(remote); | |
377 | if (k >= 0) | |
378 | s->remote = k; | |
379 | } | |
380 | ||
c506027a DH |
381 | if (vtnr) |
382 | safe_atou(vtnr, &s->vtnr); | |
383 | ||
9418f147 | 384 | if (seat && !s->seat) { |
a185c5aa LP |
385 | Seat *o; |
386 | ||
387 | o = hashmap_get(s->manager->seats, seat); | |
388 | if (o) | |
c506027a DH |
389 | r = seat_attach_session(o, s); |
390 | if (!o || r < 0) | |
391 | log_error("Cannot attach session %s to seat %s", s->id, seat); | |
a185c5aa LP |
392 | } |
393 | ||
c506027a DH |
394 | if (!s->seat || !seat_has_vts(s->seat)) |
395 | s->vtnr = 0; | |
a185c5aa | 396 | |
e6494a07 | 397 | if (position && s->seat) { |
49e6fdbf DH |
398 | unsigned int npos; |
399 | ||
e6494a07 | 400 | safe_atou(position, &npos); |
49e6fdbf DH |
401 | seat_claim_position(s->seat, s, npos); |
402 | } | |
403 | ||
a185c5aa | 404 | if (leader) { |
f8e2fb7b LP |
405 | k = parse_pid(leader, &s->leader); |
406 | if (k >= 0) | |
407 | audit_session_from_pid(s->leader, &s->audit_id); | |
a185c5aa LP |
408 | } |
409 | ||
a91e4e53 LP |
410 | if (type) { |
411 | SessionType t; | |
412 | ||
413 | t = session_type_from_string(type); | |
414 | if (t >= 0) | |
415 | s->type = t; | |
416 | } | |
417 | ||
55efac6c LP |
418 | if (class) { |
419 | SessionClass c; | |
420 | ||
421 | c = session_class_from_string(class); | |
422 | if (c >= 0) | |
423 | s->class = c; | |
424 | } | |
425 | ||
be94d954 MP |
426 | if (state && streq(state, "closing")) |
427 | s->stopping = true; | |
428 | ||
b4f78aea LP |
429 | if (s->fifo_path) { |
430 | int fd; | |
431 | ||
432 | /* If we open an unopened pipe for reading we will not | |
433 | get an EOF. to trigger an EOF we hence open it for | |
be94d954 MP |
434 | writing, but close it right away which then will |
435 | trigger the EOF. This will happen immediately if no | |
436 | other process has the FIFO open for writing, i. e. | |
437 | when the session died before logind (re)started. */ | |
b4f78aea LP |
438 | |
439 | fd = session_create_fifo(s); | |
03e334a1 | 440 | safe_close(fd); |
b4f78aea LP |
441 | } |
442 | ||
9444b1f2 LP |
443 | if (realtime) { |
444 | unsigned long long l; | |
445 | if (sscanf(realtime, "%llu", &l) > 0) | |
446 | s->timestamp.realtime = l; | |
447 | } | |
448 | ||
449 | if (monotonic) { | |
450 | unsigned long long l; | |
451 | if (sscanf(monotonic, "%llu", &l) > 0) | |
452 | s->timestamp.monotonic = l; | |
453 | } | |
a185c5aa | 454 | |
6d33772f DH |
455 | if (controller) { |
456 | if (bus_name_has_owner(s->manager->bus, controller, NULL) > 0) | |
457 | session_set_controller(s, controller, false); | |
90a18413 DH |
458 | else |
459 | session_restore_vt(s); | |
6d33772f DH |
460 | } |
461 | ||
a185c5aa | 462 | return r; |
20263082 LP |
463 | } |
464 | ||
465 | int session_activate(Session *s) { | |
d7bd01b5 DH |
466 | unsigned int num_pending; |
467 | ||
20263082 | 468 | assert(s); |
9444b1f2 | 469 | assert(s->user); |
20263082 | 470 | |
20263082 | 471 | if (!s->seat) |
15411c0c | 472 | return -EOPNOTSUPP; |
20263082 LP |
473 | |
474 | if (s->seat->active == s) | |
475 | return 0; | |
476 | ||
d7bd01b5 DH |
477 | /* on seats with VTs, we let VTs manage session-switching */ |
478 | if (seat_has_vts(s->seat)) { | |
92bd5ff3 | 479 | if (!s->vtnr) |
15411c0c | 480 | return -EOPNOTSUPP; |
d7bd01b5 DH |
481 | |
482 | return chvt(s->vtnr); | |
483 | } | |
484 | ||
485 | /* On seats without VTs, we implement session-switching in logind. We | |
486 | * try to pause all session-devices and wait until the session | |
487 | * controller acknowledged them. Once all devices are asleep, we simply | |
488 | * switch the active session and be done. | |
489 | * We save the session we want to switch to in seat->pending_switch and | |
490 | * seat_complete_switch() will perform the final switch. */ | |
491 | ||
492 | s->seat->pending_switch = s; | |
493 | ||
494 | /* if no devices are running, immediately perform the session switch */ | |
495 | num_pending = session_device_try_pause_all(s); | |
496 | if (!num_pending) | |
497 | seat_complete_switch(s->seat); | |
20263082 | 498 | |
d7bd01b5 | 499 | return 0; |
20263082 LP |
500 | } |
501 | ||
fb6becb4 | 502 | static int session_start_scope(Session *s) { |
98a28fef LP |
503 | int r; |
504 | ||
505 | assert(s); | |
9444b1f2 | 506 | assert(s->user); |
fb6becb4 | 507 | assert(s->user->slice); |
98a28fef | 508 | |
fb6becb4 | 509 | if (!s->scope) { |
cc377381 | 510 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
d0af76e6 | 511 | _cleanup_free_ char *description = NULL; |
39883f62 | 512 | char *scope, *job = NULL; |
d0af76e6 | 513 | |
405e0255 LP |
514 | description = strjoin("Session ", s->id, " of user ", s->user->name, NULL); |
515 | if (!description) | |
516 | return log_oom(); | |
517 | ||
d0af76e6 LP |
518 | scope = strjoin("session-", s->id, ".scope", NULL); |
519 | if (!scope) | |
ae018d9b LP |
520 | return log_oom(); |
521 | ||
646e392e | 522 | r = manager_start_scope(s->manager, scope, s->leader, s->user->slice, description, "systemd-logind.service", "systemd-user-sessions.service", &error, &job); |
d0af76e6 | 523 | if (r < 0) { |
042f5988 | 524 | log_error("Failed to start session scope %s: %s %s", |
cc377381 | 525 | scope, bus_error_message(&error, r), error.name); |
d0af76e6 | 526 | free(scope); |
f2d4f98d | 527 | return r; |
d0af76e6 LP |
528 | } else { |
529 | s->scope = scope; | |
530 | ||
531 | free(s->scope_job); | |
532 | s->scope_job = job; | |
533 | } | |
20263082 LP |
534 | } |
535 | ||
d0af76e6 LP |
536 | if (s->scope) |
537 | hashmap_put(s->manager->session_units, s->scope, s); | |
538 | ||
20263082 LP |
539 | return 0; |
540 | } | |
541 | ||
542 | int session_start(Session *s) { | |
543 | int r; | |
544 | ||
545 | assert(s); | |
9444b1f2 LP |
546 | |
547 | if (!s->user) | |
548 | return -ESTALE; | |
20263082 | 549 | |
9418f147 LP |
550 | if (s->started) |
551 | return 0; | |
552 | ||
ed18b08b LP |
553 | r = user_start(s->user); |
554 | if (r < 0) | |
555 | return r; | |
556 | ||
fb6becb4 LP |
557 | /* Create cgroup */ |
558 | r = session_start_scope(s); | |
559 | if (r < 0) | |
560 | return r; | |
561 | ||
d9eb81f9 | 562 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 563 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_START), |
877d54e9 LP |
564 | "SESSION_ID=%s", s->id, |
565 | "USER_ID=%s", s->user->name, | |
de0671ee | 566 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 567 | LOG_MESSAGE("New session %s of user %s.", s->id, s->user->name), |
877d54e9 | 568 | NULL); |
98a28fef | 569 | |
9444b1f2 LP |
570 | if (!dual_timestamp_is_set(&s->timestamp)) |
571 | dual_timestamp_get(&s->timestamp); | |
14c3baca | 572 | |
e9816c48 LP |
573 | if (s->seat) |
574 | seat_read_active_vt(s->seat); | |
575 | ||
9418f147 LP |
576 | s->started = true; |
577 | ||
952d3260 LP |
578 | user_elect_display(s->user); |
579 | ||
5f41d1f1 | 580 | /* Save data */ |
e9816c48 | 581 | session_save(s); |
7f7bb946 | 582 | user_save(s->user); |
5f41d1f1 LP |
583 | if (s->seat) |
584 | seat_save(s->seat); | |
e9816c48 | 585 | |
5f41d1f1 | 586 | /* Send signals */ |
da119395 | 587 | session_send_signal(s, true); |
952d3260 | 588 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 LP |
589 | if (s->seat) { |
590 | if (s->seat->active == s) | |
cc377381 | 591 | seat_send_changed(s->seat, "Sessions", "ActiveSession", NULL); |
9418f147 | 592 | else |
cc377381 | 593 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
594 | } |
595 | ||
20263082 LP |
596 | return 0; |
597 | } | |
598 | ||
9bb69af4 | 599 | static int session_stop_scope(Session *s, bool force) { |
cc377381 | 600 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
39883f62 | 601 | char *job = NULL; |
20263082 | 602 | int r; |
20263082 LP |
603 | |
604 | assert(s); | |
605 | ||
fb6becb4 LP |
606 | if (!s->scope) |
607 | return 0; | |
9b221b63 | 608 | |
9bb69af4 | 609 | if (force || manager_shall_kill(s->manager, s->user->name)) { |
5f41d1f1 LP |
610 | r = manager_stop_unit(s->manager, s->scope, &error, &job); |
611 | if (r < 0) { | |
612 | log_error("Failed to stop session scope: %s", bus_error_message(&error, r)); | |
613 | return r; | |
614 | } | |
20263082 | 615 | |
5f41d1f1 LP |
616 | free(s->scope_job); |
617 | s->scope_job = job; | |
618 | } else { | |
619 | r = manager_abandon_scope(s->manager, s->scope, &error); | |
620 | if (r < 0) { | |
621 | log_error("Failed to abandon session scope: %s", bus_error_message(&error, r)); | |
622 | return r; | |
623 | } | |
624 | } | |
20263082 | 625 | |
9b221b63 | 626 | return 0; |
20263082 LP |
627 | } |
628 | ||
9bb69af4 | 629 | int session_stop(Session *s, bool force) { |
405e0255 LP |
630 | int r; |
631 | ||
632 | assert(s); | |
633 | ||
634 | if (!s->user) | |
635 | return -ESTALE; | |
636 | ||
5f41d1f1 LP |
637 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
638 | ||
10189fd6 DH |
639 | if (s->seat) |
640 | seat_evict_position(s->seat, s); | |
641 | ||
5f41d1f1 LP |
642 | /* We are going down, don't care about FIFOs anymore */ |
643 | session_remove_fifo(s); | |
644 | ||
405e0255 | 645 | /* Kill cgroup */ |
9bb69af4 | 646 | r = session_stop_scope(s, force); |
405e0255 | 647 | |
5f41d1f1 LP |
648 | s->stopping = true; |
649 | ||
952d3260 LP |
650 | user_elect_display(s->user); |
651 | ||
405e0255 | 652 | session_save(s); |
cc377381 | 653 | user_save(s->user); |
405e0255 LP |
654 | |
655 | return r; | |
656 | } | |
657 | ||
658 | int session_finalize(Session *s) { | |
659 | int r = 0; | |
118ecf32 | 660 | SessionDevice *sd; |
20263082 LP |
661 | |
662 | assert(s); | |
663 | ||
9444b1f2 LP |
664 | if (!s->user) |
665 | return -ESTALE; | |
666 | ||
ed18b08b | 667 | if (s->started) |
d9eb81f9 | 668 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 669 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_STOP), |
877d54e9 LP |
670 | "SESSION_ID=%s", s->id, |
671 | "USER_ID=%s", s->user->name, | |
de0671ee | 672 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 673 | LOG_MESSAGE("Removed session %s.", s->id), |
877d54e9 | 674 | NULL); |
98a28fef | 675 | |
5f41d1f1 LP |
676 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
677 | ||
10189fd6 DH |
678 | if (s->seat) |
679 | seat_evict_position(s->seat, s); | |
680 | ||
118ecf32 DH |
681 | /* Kill session devices */ |
682 | while ((sd = hashmap_first(s->devices))) | |
683 | session_device_free(sd); | |
684 | ||
d2f92cdf LP |
685 | unlink(s->state_file); |
686 | session_add_to_gc_queue(s); | |
ed18b08b | 687 | user_add_to_gc_queue(s->user); |
14c3baca | 688 | |
405e0255 | 689 | if (s->started) { |
ed18b08b | 690 | session_send_signal(s, false); |
405e0255 LP |
691 | s->started = false; |
692 | } | |
50fb9793 | 693 | |
9418f147 LP |
694 | if (s->seat) { |
695 | if (s->seat->active == s) | |
696 | seat_set_active(s->seat, NULL); | |
697 | ||
23bd3b62 | 698 | seat_save(s->seat); |
5f41d1f1 | 699 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
700 | } |
701 | ||
23bd3b62 | 702 | user_save(s->user); |
952d3260 | 703 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 | 704 | |
20263082 LP |
705 | return r; |
706 | } | |
707 | ||
5f41d1f1 LP |
708 | static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { |
709 | Session *s = userdata; | |
710 | ||
711 | assert(es); | |
712 | assert(s); | |
713 | ||
9bb69af4 | 714 | session_stop(s, false); |
5f41d1f1 LP |
715 | return 0; |
716 | } | |
717 | ||
ad8780c9 | 718 | int session_release(Session *s) { |
5f41d1f1 LP |
719 | assert(s); |
720 | ||
721 | if (!s->started || s->stopping) | |
ad8780c9 ZJS |
722 | return 0; |
723 | ||
724 | if (s->timer_event_source) | |
725 | return 0; | |
726 | ||
727 | return sd_event_add_time(s->manager->event, | |
728 | &s->timer_event_source, | |
729 | CLOCK_MONOTONIC, | |
730 | now(CLOCK_MONOTONIC) + RELEASE_USEC, 0, | |
731 | release_timeout_callback, s); | |
5f41d1f1 LP |
732 | } |
733 | ||
20263082 LP |
734 | bool session_is_active(Session *s) { |
735 | assert(s); | |
736 | ||
737 | if (!s->seat) | |
738 | return true; | |
739 | ||
740 | return s->seat->active == s; | |
741 | } | |
742 | ||
23406ce5 LP |
743 | static int get_tty_atime(const char *tty, usec_t *atime) { |
744 | _cleanup_free_ char *p = NULL; | |
a185c5aa | 745 | struct stat st; |
23406ce5 LP |
746 | |
747 | assert(tty); | |
748 | assert(atime); | |
749 | ||
750 | if (!path_is_absolute(tty)) { | |
751 | p = strappend("/dev/", tty); | |
752 | if (!p) | |
753 | return -ENOMEM; | |
754 | ||
755 | tty = p; | |
756 | } else if (!path_startswith(tty, "/dev/")) | |
757 | return -ENOENT; | |
758 | ||
759 | if (lstat(tty, &st) < 0) | |
760 | return -errno; | |
761 | ||
762 | *atime = timespec_load(&st.st_atim); | |
763 | return 0; | |
764 | } | |
765 | ||
766 | static int get_process_ctty_atime(pid_t pid, usec_t *atime) { | |
767 | _cleanup_free_ char *p = NULL; | |
768 | int r; | |
769 | ||
770 | assert(pid > 0); | |
771 | assert(atime); | |
772 | ||
773 | r = get_ctty(pid, NULL, &p); | |
774 | if (r < 0) | |
775 | return r; | |
776 | ||
777 | return get_tty_atime(p, atime); | |
778 | } | |
779 | ||
780 | int session_get_idle_hint(Session *s, dual_timestamp *t) { | |
23406ce5 LP |
781 | usec_t atime = 0, n; |
782 | int r; | |
a185c5aa LP |
783 | |
784 | assert(s); | |
785 | ||
23406ce5 | 786 | /* Explicit idle hint is set */ |
a185c5aa LP |
787 | if (s->idle_hint) { |
788 | if (t) | |
789 | *t = s->idle_hint_timestamp; | |
790 | ||
791 | return s->idle_hint; | |
792 | } | |
793 | ||
0762eaa3 | 794 | /* Graphical sessions should really implement a real |
23406ce5 LP |
795 | * idle hint logic */ |
796 | if (s->display) | |
a185c5aa LP |
797 | goto dont_know; |
798 | ||
23406ce5 LP |
799 | /* For sessions with an explicitly configured tty, let's check |
800 | * its atime */ | |
801 | if (s->tty) { | |
802 | r = get_tty_atime(s->tty, &atime); | |
803 | if (r >= 0) | |
804 | goto found_atime; | |
805 | } | |
a185c5aa | 806 | |
23406ce5 LP |
807 | /* For sessions with a leader but no explicitly configured |
808 | * tty, let's check the controlling tty of the leader */ | |
809 | if (s->leader > 0) { | |
810 | r = get_process_ctty_atime(s->leader, &atime); | |
811 | if (r >= 0) | |
812 | goto found_atime; | |
a185c5aa LP |
813 | } |
814 | ||
a185c5aa LP |
815 | dont_know: |
816 | if (t) | |
817 | *t = s->idle_hint_timestamp; | |
818 | ||
819 | return 0; | |
23406ce5 LP |
820 | |
821 | found_atime: | |
822 | if (t) | |
823 | dual_timestamp_from_realtime(t, atime); | |
824 | ||
825 | n = now(CLOCK_REALTIME); | |
826 | ||
827 | if (s->manager->idle_action_usec <= 0) | |
828 | return 0; | |
829 | ||
830 | return atime + s->manager->idle_action_usec <= n; | |
a185c5aa LP |
831 | } |
832 | ||
bef422ae LP |
833 | void session_set_idle_hint(Session *s, bool b) { |
834 | assert(s); | |
835 | ||
836 | if (s->idle_hint == b) | |
837 | return; | |
838 | ||
839 | s->idle_hint = b; | |
840 | dual_timestamp_get(&s->idle_hint_timestamp); | |
9418f147 | 841 | |
cc377381 | 842 | session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
9418f147 LP |
843 | |
844 | if (s->seat) | |
cc377381 LP |
845 | seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
846 | ||
847 | user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
848 | manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
849 | } | |
850 | ||
851 | static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
852 | Session *s = userdata; | |
853 | ||
854 | assert(s); | |
855 | assert(s->fifo_fd == fd); | |
856 | ||
857 | /* EOF on the FIFO means the session died abnormally. */ | |
858 | ||
859 | session_remove_fifo(s); | |
9bb69af4 | 860 | session_stop(s, false); |
cc377381 LP |
861 | |
862 | return 1; | |
bef422ae LP |
863 | } |
864 | ||
932e3ee7 LP |
865 | int session_create_fifo(Session *s) { |
866 | int r; | |
867 | ||
31b79c2b LP |
868 | assert(s); |
869 | ||
b4f78aea | 870 | /* Create FIFO */ |
932e3ee7 | 871 | if (!s->fifo_path) { |
d2e54fae | 872 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
e6061ab2 LP |
873 | if (r < 0) |
874 | return r; | |
875 | ||
932e3ee7 LP |
876 | if (asprintf(&s->fifo_path, "/run/systemd/sessions/%s.ref", s->id) < 0) |
877 | return -ENOMEM; | |
31b79c2b | 878 | |
932e3ee7 LP |
879 | if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST) |
880 | return -errno; | |
881 | } | |
31b79c2b | 882 | |
932e3ee7 | 883 | /* Open reading side */ |
b4f78aea | 884 | if (s->fifo_fd < 0) { |
b4f78aea LP |
885 | s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY); |
886 | if (s->fifo_fd < 0) | |
887 | return -errno; | |
888 | ||
cc377381 LP |
889 | } |
890 | ||
891 | if (!s->fifo_event_source) { | |
151b9b96 | 892 | r = sd_event_add_io(s->manager->event, &s->fifo_event_source, s->fifo_fd, 0, session_dispatch_fifo, s); |
b4f78aea LP |
893 | if (r < 0) |
894 | return r; | |
895 | ||
718db961 | 896 | r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_IDLE); |
cc377381 LP |
897 | if (r < 0) |
898 | return r; | |
b4f78aea | 899 | } |
932e3ee7 LP |
900 | |
901 | /* Open writing side */ | |
902 | r = open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY); | |
903 | if (r < 0) | |
904 | return -errno; | |
31b79c2b | 905 | |
932e3ee7 LP |
906 | return r; |
907 | } | |
908 | ||
5f41d1f1 | 909 | static void session_remove_fifo(Session *s) { |
932e3ee7 LP |
910 | assert(s); |
911 | ||
03e334a1 LP |
912 | s->fifo_event_source = sd_event_source_unref(s->fifo_event_source); |
913 | s->fifo_fd = safe_close(s->fifo_fd); | |
932e3ee7 LP |
914 | |
915 | if (s->fifo_path) { | |
916 | unlink(s->fifo_path); | |
917 | free(s->fifo_path); | |
918 | s->fifo_path = NULL; | |
919 | } | |
31b79c2b LP |
920 | } |
921 | ||
cc377381 | 922 | bool session_check_gc(Session *s, bool drop_not_started) { |
20263082 LP |
923 | assert(s); |
924 | ||
4a4b033f | 925 | if (drop_not_started && !s->started) |
cc377381 | 926 | return false; |
932e3ee7 | 927 | |
9444b1f2 | 928 | if (!s->user) |
cc377381 | 929 | return false; |
9444b1f2 | 930 | |
932e3ee7 | 931 | if (s->fifo_fd >= 0) { |
5f41d1f1 | 932 | if (pipe_eof(s->fifo_fd) <= 0) |
cc377381 | 933 | return true; |
20263082 LP |
934 | } |
935 | ||
cc377381 LP |
936 | if (s->scope_job && manager_job_is_active(s->manager, s->scope_job)) |
937 | return true; | |
20263082 | 938 | |
cc377381 LP |
939 | if (s->scope && manager_unit_is_active(s->manager, s->scope)) |
940 | return true; | |
20263082 | 941 | |
cc377381 | 942 | return false; |
20263082 LP |
943 | } |
944 | ||
14c3baca LP |
945 | void session_add_to_gc_queue(Session *s) { |
946 | assert(s); | |
947 | ||
948 | if (s->in_gc_queue) | |
949 | return; | |
950 | ||
71fda00f | 951 | LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s); |
14c3baca LP |
952 | s->in_gc_queue = true; |
953 | } | |
954 | ||
0604381b LP |
955 | SessionState session_get_state(Session *s) { |
956 | assert(s); | |
957 | ||
8fe63cd4 | 958 | /* always check closing first */ |
5f41d1f1 LP |
959 | if (s->stopping || s->timer_event_source) |
960 | return SESSION_CLOSING; | |
961 | ||
8fe63cd4 | 962 | if (s->scope_job || s->fifo_fd < 0) |
405e0255 | 963 | return SESSION_OPENING; |
fb6becb4 | 964 | |
0604381b LP |
965 | if (session_is_active(s)) |
966 | return SESSION_ACTIVE; | |
967 | ||
968 | return SESSION_ONLINE; | |
969 | } | |
970 | ||
de07ab16 | 971 | int session_kill(Session *s, KillWho who, int signo) { |
de07ab16 LP |
972 | assert(s); |
973 | ||
fb6becb4 | 974 | if (!s->scope) |
de07ab16 LP |
975 | return -ESRCH; |
976 | ||
fb6becb4 | 977 | return manager_kill_unit(s->manager, s->scope, who, signo, NULL); |
de07ab16 LP |
978 | } |
979 | ||
90a18413 | 980 | static int session_open_vt(Session *s) { |
5f41d1f1 | 981 | char path[sizeof("/dev/tty") + DECIMAL_STR_MAX(s->vtnr)]; |
90a18413 | 982 | |
baccf3e4 OB |
983 | if (s->vtnr < 1) |
984 | return -ENODEV; | |
90a18413 DH |
985 | |
986 | if (s->vtfd >= 0) | |
987 | return s->vtfd; | |
988 | ||
92bd5ff3 | 989 | sprintf(path, "/dev/tty%u", s->vtnr); |
90a18413 | 990 | s->vtfd = open(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY); |
4a62c710 MS |
991 | if (s->vtfd < 0) |
992 | return log_error_errno(errno, "cannot open VT %s of session %s: %m", path, s->id); | |
90a18413 DH |
993 | |
994 | return s->vtfd; | |
995 | } | |
996 | ||
baccf3e4 | 997 | int session_prepare_vt(Session *s) { |
90a18413 DH |
998 | int vt, r; |
999 | struct vt_mode mode = { 0 }; | |
90a18413 | 1000 | |
baccf3e4 OB |
1001 | if (s->vtnr < 1) |
1002 | return 0; | |
1003 | ||
90a18413 DH |
1004 | vt = session_open_vt(s); |
1005 | if (vt < 0) | |
baccf3e4 | 1006 | return vt; |
90a18413 | 1007 | |
d6176c6c | 1008 | r = fchown(vt, s->user->uid, -1); |
baccf3e4 OB |
1009 | if (r < 0) { |
1010 | r = -errno; | |
56f64d95 | 1011 | log_error_errno(errno, "Cannot change owner of /dev/tty%u: %m", s->vtnr); |
d6176c6c | 1012 | goto error; |
baccf3e4 | 1013 | } |
d6176c6c | 1014 | |
90a18413 | 1015 | r = ioctl(vt, KDSKBMODE, K_OFF); |
baccf3e4 OB |
1016 | if (r < 0) { |
1017 | r = -errno; | |
56f64d95 | 1018 | log_error_errno(errno, "Cannot set K_OFF on /dev/tty%u: %m", s->vtnr); |
90a18413 | 1019 | goto error; |
baccf3e4 | 1020 | } |
90a18413 DH |
1021 | |
1022 | r = ioctl(vt, KDSETMODE, KD_GRAPHICS); | |
baccf3e4 OB |
1023 | if (r < 0) { |
1024 | r = -errno; | |
56f64d95 | 1025 | log_error_errno(errno, "Cannot set KD_GRAPHICS on /dev/tty%u: %m", s->vtnr); |
90a18413 | 1026 | goto error; |
baccf3e4 | 1027 | } |
90a18413 | 1028 | |
90a18413 DH |
1029 | /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS. |
1030 | * So we need a dummy handler here which just acknowledges *all* VT | |
1031 | * switch requests. */ | |
1032 | mode.mode = VT_PROCESS; | |
92683ad2 DH |
1033 | mode.relsig = SIGRTMIN; |
1034 | mode.acqsig = SIGRTMIN + 1; | |
90a18413 | 1035 | r = ioctl(vt, VT_SETMODE, &mode); |
baccf3e4 OB |
1036 | if (r < 0) { |
1037 | r = -errno; | |
56f64d95 | 1038 | log_error_errno(errno, "Cannot set VT_PROCESS on /dev/tty%u: %m", s->vtnr); |
90a18413 | 1039 | goto error; |
baccf3e4 | 1040 | } |
90a18413 | 1041 | |
baccf3e4 | 1042 | return 0; |
90a18413 DH |
1043 | |
1044 | error: | |
90a18413 | 1045 | session_restore_vt(s); |
baccf3e4 | 1046 | return r; |
90a18413 DH |
1047 | } |
1048 | ||
1049 | void session_restore_vt(Session *s) { | |
a0eb2a75 | 1050 | _cleanup_free_ char *utf8 = NULL; |
90a18413 DH |
1051 | int vt, kb = K_XLATE; |
1052 | struct vt_mode mode = { 0 }; | |
1053 | ||
1054 | vt = session_open_vt(s); | |
1055 | if (vt < 0) | |
1056 | return; | |
1057 | ||
2bf10523 | 1058 | (void) ioctl(vt, KDSETMODE, KD_TEXT); |
90a18413 DH |
1059 | |
1060 | if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8) >= 0 && *utf8 == '1') | |
1061 | kb = K_UNICODE; | |
03e334a1 | 1062 | |
2bf10523 | 1063 | (void) ioctl(vt, KDSKBMODE, kb); |
90a18413 DH |
1064 | |
1065 | mode.mode = VT_AUTO; | |
2bf10523 | 1066 | (void) ioctl(vt, VT_SETMODE, &mode); |
90a18413 | 1067 | |
d6176c6c RS |
1068 | fchown(vt, 0, -1); |
1069 | ||
03e334a1 | 1070 | s->vtfd = safe_close(s->vtfd); |
90a18413 DH |
1071 | } |
1072 | ||
2ec3ff66 | 1073 | void session_leave_vt(Session *s) { |
ce540a24 DH |
1074 | int r; |
1075 | ||
2ec3ff66 DH |
1076 | assert(s); |
1077 | ||
1078 | /* This is called whenever we get a VT-switch signal from the kernel. | |
1079 | * We acknowledge all of them unconditionally. Note that session are | |
1080 | * free to overwrite those handlers and we only register them for | |
1081 | * sessions with controllers. Legacy sessions are not affected. | |
1082 | * However, if we switch from a non-legacy to a legacy session, we must | |
1083 | * make sure to pause all device before acknowledging the switch. We | |
1084 | * process the real switch only after we are notified via sysfs, so the | |
1085 | * legacy session might have already started using the devices. If we | |
1086 | * don't pause the devices before the switch, we might confuse the | |
1087 | * session we switch to. */ | |
1088 | ||
1089 | if (s->vtfd < 0) | |
1090 | return; | |
1091 | ||
1092 | session_device_pause_all(s); | |
ce540a24 DH |
1093 | r = ioctl(s->vtfd, VT_RELDISP, 1); |
1094 | if (r < 0) | |
56f64d95 | 1095 | log_debug_errno(errno, "Cannot release VT of session %s: %m", s->id); |
2ec3ff66 DH |
1096 | } |
1097 | ||
cc377381 | 1098 | bool session_is_controller(Session *s, const char *sender) { |
ae5e06bd DH |
1099 | assert(s); |
1100 | ||
1101 | return streq_ptr(s->controller, sender); | |
1102 | } | |
1103 | ||
b12e5615 DH |
1104 | static void session_release_controller(Session *s, bool notify) { |
1105 | _cleanup_free_ char *name = NULL; | |
6d33772f DH |
1106 | SessionDevice *sd; |
1107 | ||
b12e5615 DH |
1108 | if (!s->controller) |
1109 | return; | |
6d33772f | 1110 | |
b12e5615 | 1111 | name = s->controller; |
90a18413 | 1112 | |
b12e5615 DH |
1113 | /* By resetting the controller before releasing the devices, we won't |
1114 | * send notification signals. This avoids sending useless notifications | |
1115 | * if the controller is released on disconnects. */ | |
1116 | if (!notify) | |
1117 | s->controller = NULL; | |
6d33772f | 1118 | |
b12e5615 DH |
1119 | while ((sd = hashmap_first(s->devices))) |
1120 | session_device_free(sd); | |
1121 | ||
1122 | s->controller = NULL; | |
3cde9e8f DM |
1123 | s->track = sd_bus_track_unref(s->track); |
1124 | } | |
1125 | ||
1126 | static int on_bus_track(sd_bus_track *track, void *userdata) { | |
1127 | Session *s = userdata; | |
1128 | ||
1129 | assert(track); | |
1130 | assert(s); | |
1131 | ||
1132 | session_drop_controller(s); | |
1133 | ||
1134 | return 0; | |
6d33772f DH |
1135 | } |
1136 | ||
ae5e06bd | 1137 | int session_set_controller(Session *s, const char *sender, bool force) { |
b12e5615 | 1138 | _cleanup_free_ char *name = NULL; |
ae5e06bd DH |
1139 | int r; |
1140 | ||
1141 | assert(s); | |
1142 | assert(sender); | |
1143 | ||
1144 | if (session_is_controller(s, sender)) | |
1145 | return 0; | |
1146 | if (s->controller && !force) | |
1147 | return -EBUSY; | |
1148 | ||
b12e5615 DH |
1149 | name = strdup(sender); |
1150 | if (!name) | |
ae5e06bd DH |
1151 | return -ENOMEM; |
1152 | ||
3cde9e8f DM |
1153 | s->track = sd_bus_track_unref(s->track); |
1154 | r = sd_bus_track_new(s->manager->bus, &s->track, on_bus_track, s); | |
1155 | if (r < 0) | |
1156 | return r; | |
1157 | ||
1158 | r = sd_bus_track_add_name(s->track, name); | |
1159 | if (r < 0) | |
ae5e06bd | 1160 | return r; |
ae5e06bd | 1161 | |
90a18413 DH |
1162 | /* When setting a session controller, we forcibly mute the VT and set |
1163 | * it into graphics-mode. Applications can override that by changing | |
1164 | * VT state after calling TakeControl(). However, this serves as a good | |
1165 | * default and well-behaving controllers can now ignore VTs entirely. | |
1166 | * Note that we reset the VT on ReleaseControl() and if the controller | |
1167 | * exits. | |
1168 | * If logind crashes/restarts, we restore the controller during restart | |
1169 | * or reset the VT in case it crashed/exited, too. */ | |
baccf3e4 | 1170 | r = session_prepare_vt(s); |
13f493dc | 1171 | if (r < 0) { |
3cde9e8f | 1172 | s->track = sd_bus_track_unref(s->track); |
baccf3e4 | 1173 | return r; |
13f493dc | 1174 | } |
baccf3e4 | 1175 | |
b12e5615 DH |
1176 | session_release_controller(s, true); |
1177 | s->controller = name; | |
1178 | name = NULL; | |
1179 | session_save(s); | |
90a18413 | 1180 | |
ae5e06bd DH |
1181 | return 0; |
1182 | } | |
1183 | ||
1184 | void session_drop_controller(Session *s) { | |
1185 | assert(s); | |
1186 | ||
1187 | if (!s->controller) | |
1188 | return; | |
1189 | ||
3cde9e8f | 1190 | s->track = sd_bus_track_unref(s->track); |
b12e5615 DH |
1191 | session_release_controller(s, false); |
1192 | session_save(s); | |
1193 | session_restore_vt(s); | |
ae5e06bd DH |
1194 | } |
1195 | ||
fb6becb4 LP |
1196 | static const char* const session_state_table[_SESSION_STATE_MAX] = { |
1197 | [SESSION_OPENING] = "opening", | |
0604381b LP |
1198 | [SESSION_ONLINE] = "online", |
1199 | [SESSION_ACTIVE] = "active", | |
1200 | [SESSION_CLOSING] = "closing" | |
1201 | }; | |
1202 | ||
1203 | DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState); | |
1204 | ||
20263082 | 1205 | static const char* const session_type_table[_SESSION_TYPE_MAX] = { |
2c5859af | 1206 | [SESSION_UNSPECIFIED] = "unspecified", |
3f49d45a | 1207 | [SESSION_TTY] = "tty", |
98a28fef | 1208 | [SESSION_X11] = "x11", |
d9eb81f9 | 1209 | [SESSION_WAYLAND] = "wayland", |
9541666b | 1210 | [SESSION_MIR] = "mir", |
e9e74f28 | 1211 | [SESSION_WEB] = "web", |
20263082 LP |
1212 | }; |
1213 | ||
1214 | DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType); | |
de07ab16 | 1215 | |
55efac6c LP |
1216 | static const char* const session_class_table[_SESSION_CLASS_MAX] = { |
1217 | [SESSION_USER] = "user", | |
1218 | [SESSION_GREETER] = "greeter", | |
e2acb67b LP |
1219 | [SESSION_LOCK_SCREEN] = "lock-screen", |
1220 | [SESSION_BACKGROUND] = "background" | |
55efac6c LP |
1221 | }; |
1222 | ||
1223 | DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass); | |
1224 | ||
de07ab16 LP |
1225 | static const char* const kill_who_table[_KILL_WHO_MAX] = { |
1226 | [KILL_LEADER] = "leader", | |
1227 | [KILL_ALL] = "all" | |
1228 | }; | |
1229 | ||
1230 | DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); |