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