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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" |
20263082 | 40 | |
5f41d1f1 LP |
41 | #define RELEASE_USEC (20*USEC_PER_SEC) |
42 | ||
43 | static void session_remove_fifo(Session *s); | |
44 | ||
9444b1f2 | 45 | Session* session_new(Manager *m, const char *id) { |
20263082 LP |
46 | Session *s; |
47 | ||
48 | assert(m); | |
49 | assert(id); | |
4b549144 | 50 | assert(session_id_valid(id)); |
20263082 | 51 | |
14c3baca | 52 | s = new0(Session, 1); |
20263082 LP |
53 | if (!s) |
54 | return NULL; | |
55 | ||
98a28fef | 56 | s->state_file = strappend("/run/systemd/sessions/", id); |
20263082 LP |
57 | if (!s->state_file) { |
58 | free(s); | |
59 | return NULL; | |
60 | } | |
61 | ||
d5099efc | 62 | s->devices = hashmap_new(&devt_hash_ops); |
118ecf32 DH |
63 | if (!s->devices) { |
64 | free(s->state_file); | |
65 | free(s); | |
66 | return NULL; | |
67 | } | |
68 | ||
2b6bf07d | 69 | s->id = basename(s->state_file); |
20263082 LP |
70 | |
71 | if (hashmap_put(m->sessions, s->id, s) < 0) { | |
118ecf32 | 72 | hashmap_free(s->devices); |
f8e2fb7b | 73 | free(s->state_file); |
20263082 LP |
74 | free(s); |
75 | return NULL; | |
76 | } | |
77 | ||
78 | s->manager = m; | |
932e3ee7 | 79 | s->fifo_fd = -1; |
90a18413 | 80 | s->vtfd = -1; |
20263082 LP |
81 | |
82 | return s; | |
83 | } | |
84 | ||
85 | void session_free(Session *s) { | |
118ecf32 DH |
86 | SessionDevice *sd; |
87 | ||
20263082 LP |
88 | assert(s); |
89 | ||
14c3baca | 90 | if (s->in_gc_queue) |
71fda00f | 91 | LIST_REMOVE(gc_queue, s->manager->session_gc_queue, s); |
14c3baca | 92 | |
5f41d1f1 LP |
93 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
94 | ||
cc377381 LP |
95 | session_remove_fifo(s); |
96 | ||
ae5e06bd DH |
97 | session_drop_controller(s); |
98 | ||
118ecf32 DH |
99 | while ((sd = hashmap_first(s->devices))) |
100 | session_device_free(sd); | |
101 | ||
102 | hashmap_free(s->devices); | |
103 | ||
20263082 | 104 | if (s->user) { |
71fda00f | 105 | LIST_REMOVE(sessions_by_user, s->user->sessions, s); |
20263082 LP |
106 | |
107 | if (s->user->display == s) | |
108 | s->user->display = NULL; | |
109 | } | |
110 | ||
9418f147 LP |
111 | if (s->seat) { |
112 | if (s->seat->active == s) | |
113 | s->seat->active = NULL; | |
d7bd01b5 DH |
114 | if (s->seat->pending_switch == s) |
115 | s->seat->pending_switch = NULL; | |
9418f147 | 116 | |
49e6fdbf | 117 | seat_evict_position(s->seat, s); |
71fda00f | 118 | LIST_REMOVE(sessions_by_seat, s->seat->sessions, s); |
9418f147 | 119 | } |
20263082 | 120 | |
fb6becb4 LP |
121 | if (s->scope) { |
122 | hashmap_remove(s->manager->session_units, s->scope); | |
123 | free(s->scope); | |
124 | } | |
125 | ||
126 | free(s->scope_job); | |
1713813d | 127 | |
cc377381 | 128 | sd_bus_message_unref(s->create_message); |
20263082 LP |
129 | |
130 | free(s->tty); | |
131 | free(s->display); | |
132 | free(s->remote_host); | |
3f49d45a | 133 | free(s->remote_user); |
98a28fef | 134 | free(s->service); |
a4cd87e9 | 135 | free(s->desktop); |
20263082 LP |
136 | |
137 | hashmap_remove(s->manager->sessions, s->id); | |
98a28fef | 138 | |
d2f92cdf | 139 | free(s->state_file); |
20263082 LP |
140 | free(s); |
141 | } | |
142 | ||
9444b1f2 LP |
143 | void session_set_user(Session *s, User *u) { |
144 | assert(s); | |
145 | assert(!s->user); | |
146 | ||
147 | s->user = u; | |
71fda00f | 148 | LIST_PREPEND(sessions_by_user, u->sessions, s); |
9444b1f2 LP |
149 | } |
150 | ||
20263082 | 151 | int session_save(Session *s) { |
507f22bd | 152 | _cleanup_free_ char *temp_path = NULL; |
cc377381 | 153 | _cleanup_fclose_ FILE *f = NULL; |
20263082 LP |
154 | int r = 0; |
155 | ||
156 | assert(s); | |
157 | ||
9444b1f2 LP |
158 | if (!s->user) |
159 | return -ESTALE; | |
160 | ||
accaeded LP |
161 | if (!s->started) |
162 | return 0; | |
163 | ||
d2e54fae | 164 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
20263082 | 165 | if (r < 0) |
14c3baca | 166 | goto finish; |
20263082 | 167 | |
14c3baca LP |
168 | r = fopen_temporary(s->state_file, &f, &temp_path); |
169 | if (r < 0) | |
170 | goto finish; | |
20263082 LP |
171 | |
172 | assert(s->user); | |
173 | ||
14c3baca LP |
174 | fchmod(fileno(f), 0644); |
175 | ||
20263082 LP |
176 | fprintf(f, |
177 | "# This is private data. Do not parse.\n" | |
90b2de37 | 178 | "UID="UID_FMT"\n" |
20263082 LP |
179 | "USER=%s\n" |
180 | "ACTIVE=%i\n" | |
0604381b | 181 | "STATE=%s\n" |
fb6becb4 | 182 | "REMOTE=%i\n", |
90b2de37 | 183 | s->user->uid, |
20263082 LP |
184 | s->user->name, |
185 | session_is_active(s), | |
0604381b | 186 | session_state_to_string(session_get_state(s)), |
fb6becb4 | 187 | s->remote); |
20263082 | 188 | |
a91e4e53 | 189 | if (s->type >= 0) |
507f22bd | 190 | fprintf(f, "TYPE=%s\n", session_type_to_string(s->type)); |
a91e4e53 | 191 | |
55efac6c | 192 | if (s->class >= 0) |
507f22bd | 193 | fprintf(f, "CLASS=%s\n", session_class_to_string(s->class)); |
55efac6c | 194 | |
fb6becb4 LP |
195 | if (s->scope) |
196 | fprintf(f, "SCOPE=%s\n", s->scope); | |
fb6becb4 LP |
197 | if (s->scope_job) |
198 | fprintf(f, "SCOPE_JOB=%s\n", s->scope_job); | |
20263082 | 199 | |
932e3ee7 | 200 | if (s->fifo_path) |
507f22bd | 201 | fprintf(f, "FIFO=%s\n", s->fifo_path); |
932e3ee7 | 202 | |
20263082 | 203 | if (s->seat) |
507f22bd | 204 | fprintf(f, "SEAT=%s\n", s->seat->id); |
20263082 LP |
205 | |
206 | if (s->tty) | |
507f22bd | 207 | fprintf(f, "TTY=%s\n", s->tty); |
20263082 LP |
208 | |
209 | if (s->display) | |
507f22bd | 210 | fprintf(f, "DISPLAY=%s\n", s->display); |
20263082 | 211 | |
558c6490 LP |
212 | if (s->remote_host) { |
213 | _cleanup_free_ char *escaped; | |
214 | ||
215 | escaped = cescape(s->remote_host); | |
216 | if (!escaped) { | |
217 | r = -ENOMEM; | |
218 | goto finish; | |
219 | } | |
220 | ||
221 | fprintf(f, "REMOTE_HOST=%s\n", escaped); | |
222 | } | |
223 | ||
224 | if (s->remote_user) { | |
225 | _cleanup_free_ char *escaped; | |
226 | ||
227 | escaped = cescape(s->remote_user); | |
228 | if (!escaped) { | |
229 | r = -ENOMEM; | |
230 | goto finish; | |
231 | } | |
232 | ||
233 | fprintf(f, "REMOTE_USER=%s\n", escaped); | |
234 | } | |
235 | ||
236 | if (s->service) { | |
237 | _cleanup_free_ char *escaped; | |
20263082 | 238 | |
558c6490 LP |
239 | escaped = cescape(s->service); |
240 | if (!escaped) { | |
241 | r = -ENOMEM; | |
242 | goto finish; | |
243 | } | |
244 | ||
245 | fprintf(f, "SERVICE=%s\n", escaped); | |
246 | } | |
3f49d45a | 247 | |
558c6490 LP |
248 | if (s->desktop) { |
249 | _cleanup_free_ char *escaped; | |
98a28fef | 250 | |
558c6490 LP |
251 | |
252 | escaped = cescape(s->desktop); | |
253 | if (!escaped) { | |
254 | r = -ENOMEM; | |
255 | goto finish; | |
256 | } | |
257 | ||
258 | fprintf(f, "DESKTOP=%s\n", escaped); | |
259 | } | |
a4cd87e9 | 260 | |
bf7825ae | 261 | if (s->seat && seat_has_vts(s->seat)) |
92bd5ff3 | 262 | fprintf(f, "VTNR=%u\n", s->vtnr); |
20263082 | 263 | |
49e6fdbf DH |
264 | if (!s->vtnr) |
265 | fprintf(f, "POS=%u\n", s->pos); | |
266 | ||
20263082 | 267 | if (s->leader > 0) |
90b2de37 | 268 | fprintf(f, "LEADER="PID_FMT"\n", s->leader); |
20263082 LP |
269 | |
270 | if (s->audit_id > 0) | |
507f22bd | 271 | fprintf(f, "AUDIT=%"PRIu32"\n", s->audit_id); |
20263082 | 272 | |
9444b1f2 LP |
273 | if (dual_timestamp_is_set(&s->timestamp)) |
274 | fprintf(f, | |
90b2de37 ZJS |
275 | "REALTIME="USEC_FMT"\n" |
276 | "MONOTONIC="USEC_FMT"\n", | |
277 | s->timestamp.realtime, | |
278 | s->timestamp.monotonic); | |
9444b1f2 | 279 | |
6d33772f DH |
280 | if (s->controller) |
281 | fprintf(f, "CONTROLLER=%s\n", s->controller); | |
282 | ||
20263082 | 283 | fflush(f); |
14c3baca LP |
284 | |
285 | if (ferror(f) || rename(temp_path, s->state_file) < 0) { | |
20263082 LP |
286 | r = -errno; |
287 | unlink(s->state_file); | |
14c3baca | 288 | unlink(temp_path); |
20263082 LP |
289 | } |
290 | ||
14c3baca LP |
291 | finish: |
292 | if (r < 0) | |
da927ba9 | 293 | log_error_errno(r, "Failed to save session data %s: %m", s->state_file); |
14c3baca | 294 | |
20263082 LP |
295 | return r; |
296 | } | |
297 | ||
298 | int session_load(Session *s) { | |
9444b1f2 | 299 | _cleanup_free_ char *remote = NULL, |
a185c5aa LP |
300 | *seat = NULL, |
301 | *vtnr = NULL, | |
be94d954 | 302 | *state = NULL, |
49e6fdbf | 303 | *pos = NULL, |
a185c5aa | 304 | *leader = NULL, |
55efac6c | 305 | *type = NULL, |
9444b1f2 LP |
306 | *class = NULL, |
307 | *uid = NULL, | |
308 | *realtime = NULL, | |
6d33772f DH |
309 | *monotonic = NULL, |
310 | *controller = NULL; | |
a185c5aa LP |
311 | |
312 | int k, r; | |
313 | ||
20263082 LP |
314 | assert(s); |
315 | ||
a185c5aa LP |
316 | r = parse_env_file(s->state_file, NEWLINE, |
317 | "REMOTE", &remote, | |
fb6becb4 LP |
318 | "SCOPE", &s->scope, |
319 | "SCOPE_JOB", &s->scope_job, | |
932e3ee7 | 320 | "FIFO", &s->fifo_path, |
a185c5aa LP |
321 | "SEAT", &seat, |
322 | "TTY", &s->tty, | |
323 | "DISPLAY", &s->display, | |
324 | "REMOTE_HOST", &s->remote_host, | |
325 | "REMOTE_USER", &s->remote_user, | |
98a28fef | 326 | "SERVICE", &s->service, |
a4cd87e9 | 327 | "DESKTOP", &s->desktop, |
a185c5aa | 328 | "VTNR", &vtnr, |
be94d954 | 329 | "STATE", &state, |
49e6fdbf | 330 | "POS", &pos, |
a185c5aa | 331 | "LEADER", &leader, |
a91e4e53 | 332 | "TYPE", &type, |
55efac6c | 333 | "CLASS", &class, |
9444b1f2 LP |
334 | "UID", &uid, |
335 | "REALTIME", &realtime, | |
336 | "MONOTONIC", &monotonic, | |
6d33772f | 337 | "CONTROLLER", &controller, |
a185c5aa LP |
338 | NULL); |
339 | ||
f647962d MS |
340 | if (r < 0) |
341 | return log_error_errno(r, "Failed to read %s: %m", s->state_file); | |
9444b1f2 LP |
342 | |
343 | if (!s->user) { | |
344 | uid_t u; | |
345 | User *user; | |
346 | ||
347 | if (!uid) { | |
348 | log_error("UID not specified for session %s", s->id); | |
349 | return -ENOENT; | |
350 | } | |
351 | ||
352 | r = parse_uid(uid, &u); | |
353 | if (r < 0) { | |
354 | log_error("Failed to parse UID value %s for session %s.", uid, s->id); | |
355 | return r; | |
356 | } | |
357 | ||
8cb4ab00 | 358 | user = hashmap_get(s->manager->users, UID_TO_PTR(u)); |
9444b1f2 LP |
359 | if (!user) { |
360 | log_error("User of session %s not known.", s->id); | |
361 | return -ENOENT; | |
362 | } | |
363 | ||
364 | session_set_user(s, user); | |
365 | } | |
a185c5aa LP |
366 | |
367 | if (remote) { | |
368 | k = parse_boolean(remote); | |
369 | if (k >= 0) | |
370 | s->remote = k; | |
371 | } | |
372 | ||
c506027a DH |
373 | if (vtnr) |
374 | safe_atou(vtnr, &s->vtnr); | |
375 | ||
9418f147 | 376 | if (seat && !s->seat) { |
a185c5aa LP |
377 | Seat *o; |
378 | ||
379 | o = hashmap_get(s->manager->seats, seat); | |
380 | if (o) | |
c506027a DH |
381 | r = seat_attach_session(o, s); |
382 | if (!o || r < 0) | |
383 | log_error("Cannot attach session %s to seat %s", s->id, seat); | |
a185c5aa LP |
384 | } |
385 | ||
c506027a DH |
386 | if (!s->seat || !seat_has_vts(s->seat)) |
387 | s->vtnr = 0; | |
a185c5aa | 388 | |
49e6fdbf DH |
389 | if (pos && s->seat) { |
390 | unsigned int npos; | |
391 | ||
392 | safe_atou(pos, &npos); | |
393 | seat_claim_position(s->seat, s, npos); | |
394 | } | |
395 | ||
a185c5aa | 396 | if (leader) { |
f8e2fb7b LP |
397 | k = parse_pid(leader, &s->leader); |
398 | if (k >= 0) | |
399 | audit_session_from_pid(s->leader, &s->audit_id); | |
a185c5aa LP |
400 | } |
401 | ||
a91e4e53 LP |
402 | if (type) { |
403 | SessionType t; | |
404 | ||
405 | t = session_type_from_string(type); | |
406 | if (t >= 0) | |
407 | s->type = t; | |
408 | } | |
409 | ||
55efac6c LP |
410 | if (class) { |
411 | SessionClass c; | |
412 | ||
413 | c = session_class_from_string(class); | |
414 | if (c >= 0) | |
415 | s->class = c; | |
416 | } | |
417 | ||
be94d954 MP |
418 | if (state && streq(state, "closing")) |
419 | s->stopping = true; | |
420 | ||
b4f78aea LP |
421 | if (s->fifo_path) { |
422 | int fd; | |
423 | ||
424 | /* If we open an unopened pipe for reading we will not | |
425 | get an EOF. to trigger an EOF we hence open it for | |
be94d954 MP |
426 | writing, but close it right away which then will |
427 | trigger the EOF. This will happen immediately if no | |
428 | other process has the FIFO open for writing, i. e. | |
429 | when the session died before logind (re)started. */ | |
b4f78aea LP |
430 | |
431 | fd = session_create_fifo(s); | |
03e334a1 | 432 | safe_close(fd); |
b4f78aea LP |
433 | } |
434 | ||
9444b1f2 LP |
435 | if (realtime) { |
436 | unsigned long long l; | |
437 | if (sscanf(realtime, "%llu", &l) > 0) | |
438 | s->timestamp.realtime = l; | |
439 | } | |
440 | ||
441 | if (monotonic) { | |
442 | unsigned long long l; | |
443 | if (sscanf(monotonic, "%llu", &l) > 0) | |
444 | s->timestamp.monotonic = l; | |
445 | } | |
a185c5aa | 446 | |
6d33772f DH |
447 | if (controller) { |
448 | if (bus_name_has_owner(s->manager->bus, controller, NULL) > 0) | |
449 | session_set_controller(s, controller, false); | |
90a18413 DH |
450 | else |
451 | session_restore_vt(s); | |
6d33772f DH |
452 | } |
453 | ||
a185c5aa | 454 | return r; |
20263082 LP |
455 | } |
456 | ||
457 | int session_activate(Session *s) { | |
d7bd01b5 DH |
458 | unsigned int num_pending; |
459 | ||
20263082 | 460 | assert(s); |
9444b1f2 | 461 | assert(s->user); |
20263082 | 462 | |
20263082 | 463 | if (!s->seat) |
15411c0c | 464 | return -EOPNOTSUPP; |
20263082 LP |
465 | |
466 | if (s->seat->active == s) | |
467 | return 0; | |
468 | ||
d7bd01b5 DH |
469 | /* on seats with VTs, we let VTs manage session-switching */ |
470 | if (seat_has_vts(s->seat)) { | |
92bd5ff3 | 471 | if (!s->vtnr) |
15411c0c | 472 | return -EOPNOTSUPP; |
d7bd01b5 DH |
473 | |
474 | return chvt(s->vtnr); | |
475 | } | |
476 | ||
477 | /* On seats without VTs, we implement session-switching in logind. We | |
478 | * try to pause all session-devices and wait until the session | |
479 | * controller acknowledged them. Once all devices are asleep, we simply | |
480 | * switch the active session and be done. | |
481 | * We save the session we want to switch to in seat->pending_switch and | |
482 | * seat_complete_switch() will perform the final switch. */ | |
483 | ||
484 | s->seat->pending_switch = s; | |
485 | ||
486 | /* if no devices are running, immediately perform the session switch */ | |
487 | num_pending = session_device_try_pause_all(s); | |
488 | if (!num_pending) | |
489 | seat_complete_switch(s->seat); | |
20263082 | 490 | |
d7bd01b5 | 491 | return 0; |
20263082 LP |
492 | } |
493 | ||
fb6becb4 | 494 | static int session_start_scope(Session *s) { |
98a28fef LP |
495 | int r; |
496 | ||
497 | assert(s); | |
9444b1f2 | 498 | assert(s->user); |
fb6becb4 | 499 | assert(s->user->slice); |
98a28fef | 500 | |
fb6becb4 | 501 | if (!s->scope) { |
cc377381 | 502 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
d0af76e6 | 503 | _cleanup_free_ char *description = NULL; |
39883f62 | 504 | char *scope, *job = NULL; |
d0af76e6 | 505 | |
405e0255 LP |
506 | description = strjoin("Session ", s->id, " of user ", s->user->name, NULL); |
507 | if (!description) | |
508 | return log_oom(); | |
509 | ||
d0af76e6 LP |
510 | scope = strjoin("session-", s->id, ".scope", NULL); |
511 | if (!scope) | |
ae018d9b LP |
512 | return log_oom(); |
513 | ||
646e392e | 514 | r = manager_start_scope(s->manager, scope, s->leader, s->user->slice, description, "systemd-logind.service", "systemd-user-sessions.service", &error, &job); |
d0af76e6 | 515 | if (r < 0) { |
042f5988 | 516 | log_error("Failed to start session scope %s: %s %s", |
cc377381 | 517 | scope, bus_error_message(&error, r), error.name); |
d0af76e6 | 518 | free(scope); |
f2d4f98d | 519 | return r; |
d0af76e6 LP |
520 | } else { |
521 | s->scope = scope; | |
522 | ||
523 | free(s->scope_job); | |
524 | s->scope_job = job; | |
525 | } | |
20263082 LP |
526 | } |
527 | ||
d0af76e6 LP |
528 | if (s->scope) |
529 | hashmap_put(s->manager->session_units, s->scope, s); | |
530 | ||
20263082 LP |
531 | return 0; |
532 | } | |
533 | ||
534 | int session_start(Session *s) { | |
535 | int r; | |
536 | ||
537 | assert(s); | |
9444b1f2 LP |
538 | |
539 | if (!s->user) | |
540 | return -ESTALE; | |
20263082 | 541 | |
9418f147 LP |
542 | if (s->started) |
543 | return 0; | |
544 | ||
ed18b08b LP |
545 | r = user_start(s->user); |
546 | if (r < 0) | |
547 | return r; | |
548 | ||
fb6becb4 LP |
549 | /* Create cgroup */ |
550 | r = session_start_scope(s); | |
551 | if (r < 0) | |
552 | return r; | |
553 | ||
d9eb81f9 | 554 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 555 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_START), |
877d54e9 LP |
556 | "SESSION_ID=%s", s->id, |
557 | "USER_ID=%s", s->user->name, | |
de0671ee | 558 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 559 | LOG_MESSAGE("New session %s of user %s.", s->id, s->user->name), |
877d54e9 | 560 | NULL); |
98a28fef | 561 | |
9444b1f2 LP |
562 | if (!dual_timestamp_is_set(&s->timestamp)) |
563 | dual_timestamp_get(&s->timestamp); | |
14c3baca | 564 | |
e9816c48 LP |
565 | if (s->seat) |
566 | seat_read_active_vt(s->seat); | |
567 | ||
9418f147 LP |
568 | s->started = true; |
569 | ||
952d3260 LP |
570 | user_elect_display(s->user); |
571 | ||
5f41d1f1 | 572 | /* Save data */ |
e9816c48 | 573 | session_save(s); |
7f7bb946 | 574 | user_save(s->user); |
5f41d1f1 LP |
575 | if (s->seat) |
576 | seat_save(s->seat); | |
e9816c48 | 577 | |
5f41d1f1 | 578 | /* Send signals */ |
da119395 | 579 | session_send_signal(s, true); |
952d3260 | 580 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 LP |
581 | if (s->seat) { |
582 | if (s->seat->active == s) | |
cc377381 | 583 | seat_send_changed(s->seat, "Sessions", "ActiveSession", NULL); |
9418f147 | 584 | else |
cc377381 | 585 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
586 | } |
587 | ||
20263082 LP |
588 | return 0; |
589 | } | |
590 | ||
9bb69af4 | 591 | static int session_stop_scope(Session *s, bool force) { |
cc377381 | 592 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
39883f62 | 593 | char *job = NULL; |
20263082 | 594 | int r; |
20263082 LP |
595 | |
596 | assert(s); | |
597 | ||
fb6becb4 LP |
598 | if (!s->scope) |
599 | return 0; | |
9b221b63 | 600 | |
9bb69af4 | 601 | if (force || manager_shall_kill(s->manager, s->user->name)) { |
5f41d1f1 LP |
602 | r = manager_stop_unit(s->manager, s->scope, &error, &job); |
603 | if (r < 0) { | |
604 | log_error("Failed to stop session scope: %s", bus_error_message(&error, r)); | |
605 | return r; | |
606 | } | |
20263082 | 607 | |
5f41d1f1 LP |
608 | free(s->scope_job); |
609 | s->scope_job = job; | |
610 | } else { | |
611 | r = manager_abandon_scope(s->manager, s->scope, &error); | |
612 | if (r < 0) { | |
613 | log_error("Failed to abandon session scope: %s", bus_error_message(&error, r)); | |
614 | return r; | |
615 | } | |
616 | } | |
20263082 | 617 | |
9b221b63 | 618 | return 0; |
20263082 LP |
619 | } |
620 | ||
9bb69af4 | 621 | int session_stop(Session *s, bool force) { |
405e0255 LP |
622 | int r; |
623 | ||
624 | assert(s); | |
625 | ||
626 | if (!s->user) | |
627 | return -ESTALE; | |
628 | ||
5f41d1f1 LP |
629 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
630 | ||
631 | /* We are going down, don't care about FIFOs anymore */ | |
632 | session_remove_fifo(s); | |
633 | ||
405e0255 | 634 | /* Kill cgroup */ |
9bb69af4 | 635 | r = session_stop_scope(s, force); |
405e0255 | 636 | |
5f41d1f1 LP |
637 | s->stopping = true; |
638 | ||
952d3260 LP |
639 | user_elect_display(s->user); |
640 | ||
405e0255 | 641 | session_save(s); |
cc377381 | 642 | user_save(s->user); |
405e0255 LP |
643 | |
644 | return r; | |
645 | } | |
646 | ||
647 | int session_finalize(Session *s) { | |
648 | int r = 0; | |
118ecf32 | 649 | SessionDevice *sd; |
20263082 LP |
650 | |
651 | assert(s); | |
652 | ||
9444b1f2 LP |
653 | if (!s->user) |
654 | return -ESTALE; | |
655 | ||
ed18b08b | 656 | if (s->started) |
d9eb81f9 | 657 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 658 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_STOP), |
877d54e9 LP |
659 | "SESSION_ID=%s", s->id, |
660 | "USER_ID=%s", s->user->name, | |
de0671ee | 661 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 662 | LOG_MESSAGE("Removed session %s.", s->id), |
877d54e9 | 663 | NULL); |
98a28fef | 664 | |
5f41d1f1 LP |
665 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
666 | ||
118ecf32 DH |
667 | /* Kill session devices */ |
668 | while ((sd = hashmap_first(s->devices))) | |
669 | session_device_free(sd); | |
670 | ||
d2f92cdf LP |
671 | unlink(s->state_file); |
672 | session_add_to_gc_queue(s); | |
ed18b08b | 673 | user_add_to_gc_queue(s->user); |
14c3baca | 674 | |
405e0255 | 675 | if (s->started) { |
ed18b08b | 676 | session_send_signal(s, false); |
405e0255 LP |
677 | s->started = false; |
678 | } | |
50fb9793 | 679 | |
9418f147 LP |
680 | if (s->seat) { |
681 | if (s->seat->active == s) | |
682 | seat_set_active(s->seat, NULL); | |
683 | ||
23bd3b62 | 684 | seat_save(s->seat); |
5f41d1f1 | 685 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
686 | } |
687 | ||
23bd3b62 | 688 | user_save(s->user); |
952d3260 | 689 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 | 690 | |
20263082 LP |
691 | return r; |
692 | } | |
693 | ||
5f41d1f1 LP |
694 | static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { |
695 | Session *s = userdata; | |
696 | ||
697 | assert(es); | |
698 | assert(s); | |
699 | ||
9bb69af4 | 700 | session_stop(s, false); |
5f41d1f1 LP |
701 | return 0; |
702 | } | |
703 | ||
704 | void session_release(Session *s) { | |
705 | assert(s); | |
706 | ||
707 | if (!s->started || s->stopping) | |
708 | return; | |
709 | ||
710 | if (!s->timer_event_source) | |
6a0f1f6d LP |
711 | sd_event_add_time(s->manager->event, |
712 | &s->timer_event_source, | |
713 | CLOCK_MONOTONIC, | |
714 | now(CLOCK_MONOTONIC) + RELEASE_USEC, 0, | |
715 | release_timeout_callback, s); | |
5f41d1f1 LP |
716 | } |
717 | ||
20263082 LP |
718 | bool session_is_active(Session *s) { |
719 | assert(s); | |
720 | ||
721 | if (!s->seat) | |
722 | return true; | |
723 | ||
724 | return s->seat->active == s; | |
725 | } | |
726 | ||
23406ce5 LP |
727 | static int get_tty_atime(const char *tty, usec_t *atime) { |
728 | _cleanup_free_ char *p = NULL; | |
a185c5aa | 729 | struct stat st; |
23406ce5 LP |
730 | |
731 | assert(tty); | |
732 | assert(atime); | |
733 | ||
734 | if (!path_is_absolute(tty)) { | |
735 | p = strappend("/dev/", tty); | |
736 | if (!p) | |
737 | return -ENOMEM; | |
738 | ||
739 | tty = p; | |
740 | } else if (!path_startswith(tty, "/dev/")) | |
741 | return -ENOENT; | |
742 | ||
743 | if (lstat(tty, &st) < 0) | |
744 | return -errno; | |
745 | ||
746 | *atime = timespec_load(&st.st_atim); | |
747 | return 0; | |
748 | } | |
749 | ||
750 | static int get_process_ctty_atime(pid_t pid, usec_t *atime) { | |
751 | _cleanup_free_ char *p = NULL; | |
752 | int r; | |
753 | ||
754 | assert(pid > 0); | |
755 | assert(atime); | |
756 | ||
757 | r = get_ctty(pid, NULL, &p); | |
758 | if (r < 0) | |
759 | return r; | |
760 | ||
761 | return get_tty_atime(p, atime); | |
762 | } | |
763 | ||
764 | int session_get_idle_hint(Session *s, dual_timestamp *t) { | |
23406ce5 LP |
765 | usec_t atime = 0, n; |
766 | int r; | |
a185c5aa LP |
767 | |
768 | assert(s); | |
769 | ||
23406ce5 | 770 | /* Explicit idle hint is set */ |
a185c5aa LP |
771 | if (s->idle_hint) { |
772 | if (t) | |
773 | *t = s->idle_hint_timestamp; | |
774 | ||
775 | return s->idle_hint; | |
776 | } | |
777 | ||
0762eaa3 | 778 | /* Graphical sessions should really implement a real |
23406ce5 LP |
779 | * idle hint logic */ |
780 | if (s->display) | |
a185c5aa LP |
781 | goto dont_know; |
782 | ||
23406ce5 LP |
783 | /* For sessions with an explicitly configured tty, let's check |
784 | * its atime */ | |
785 | if (s->tty) { | |
786 | r = get_tty_atime(s->tty, &atime); | |
787 | if (r >= 0) | |
788 | goto found_atime; | |
789 | } | |
a185c5aa | 790 | |
23406ce5 LP |
791 | /* For sessions with a leader but no explicitly configured |
792 | * tty, let's check the controlling tty of the leader */ | |
793 | if (s->leader > 0) { | |
794 | r = get_process_ctty_atime(s->leader, &atime); | |
795 | if (r >= 0) | |
796 | goto found_atime; | |
a185c5aa LP |
797 | } |
798 | ||
a185c5aa LP |
799 | dont_know: |
800 | if (t) | |
801 | *t = s->idle_hint_timestamp; | |
802 | ||
803 | return 0; | |
23406ce5 LP |
804 | |
805 | found_atime: | |
806 | if (t) | |
807 | dual_timestamp_from_realtime(t, atime); | |
808 | ||
809 | n = now(CLOCK_REALTIME); | |
810 | ||
811 | if (s->manager->idle_action_usec <= 0) | |
812 | return 0; | |
813 | ||
814 | return atime + s->manager->idle_action_usec <= n; | |
a185c5aa LP |
815 | } |
816 | ||
bef422ae LP |
817 | void session_set_idle_hint(Session *s, bool b) { |
818 | assert(s); | |
819 | ||
820 | if (s->idle_hint == b) | |
821 | return; | |
822 | ||
823 | s->idle_hint = b; | |
824 | dual_timestamp_get(&s->idle_hint_timestamp); | |
9418f147 | 825 | |
cc377381 | 826 | session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
9418f147 LP |
827 | |
828 | if (s->seat) | |
cc377381 LP |
829 | seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
830 | ||
831 | user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
832 | manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
833 | } | |
834 | ||
835 | static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
836 | Session *s = userdata; | |
837 | ||
838 | assert(s); | |
839 | assert(s->fifo_fd == fd); | |
840 | ||
841 | /* EOF on the FIFO means the session died abnormally. */ | |
842 | ||
843 | session_remove_fifo(s); | |
9bb69af4 | 844 | session_stop(s, false); |
cc377381 LP |
845 | |
846 | return 1; | |
bef422ae LP |
847 | } |
848 | ||
932e3ee7 LP |
849 | int session_create_fifo(Session *s) { |
850 | int r; | |
851 | ||
31b79c2b LP |
852 | assert(s); |
853 | ||
b4f78aea | 854 | /* Create FIFO */ |
932e3ee7 | 855 | if (!s->fifo_path) { |
d2e54fae | 856 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
e6061ab2 LP |
857 | if (r < 0) |
858 | return r; | |
859 | ||
932e3ee7 LP |
860 | if (asprintf(&s->fifo_path, "/run/systemd/sessions/%s.ref", s->id) < 0) |
861 | return -ENOMEM; | |
31b79c2b | 862 | |
932e3ee7 LP |
863 | if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST) |
864 | return -errno; | |
865 | } | |
31b79c2b | 866 | |
932e3ee7 | 867 | /* Open reading side */ |
b4f78aea | 868 | if (s->fifo_fd < 0) { |
b4f78aea LP |
869 | s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY); |
870 | if (s->fifo_fd < 0) | |
871 | return -errno; | |
872 | ||
cc377381 LP |
873 | } |
874 | ||
875 | if (!s->fifo_event_source) { | |
151b9b96 | 876 | r = sd_event_add_io(s->manager->event, &s->fifo_event_source, s->fifo_fd, 0, session_dispatch_fifo, s); |
b4f78aea LP |
877 | if (r < 0) |
878 | return r; | |
879 | ||
718db961 | 880 | r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_IDLE); |
cc377381 LP |
881 | if (r < 0) |
882 | return r; | |
b4f78aea | 883 | } |
932e3ee7 LP |
884 | |
885 | /* Open writing side */ | |
886 | r = open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY); | |
887 | if (r < 0) | |
888 | return -errno; | |
31b79c2b | 889 | |
932e3ee7 LP |
890 | return r; |
891 | } | |
892 | ||
5f41d1f1 | 893 | static void session_remove_fifo(Session *s) { |
932e3ee7 LP |
894 | assert(s); |
895 | ||
03e334a1 LP |
896 | s->fifo_event_source = sd_event_source_unref(s->fifo_event_source); |
897 | s->fifo_fd = safe_close(s->fifo_fd); | |
932e3ee7 LP |
898 | |
899 | if (s->fifo_path) { | |
900 | unlink(s->fifo_path); | |
901 | free(s->fifo_path); | |
902 | s->fifo_path = NULL; | |
903 | } | |
31b79c2b LP |
904 | } |
905 | ||
cc377381 | 906 | bool session_check_gc(Session *s, bool drop_not_started) { |
20263082 LP |
907 | assert(s); |
908 | ||
4a4b033f | 909 | if (drop_not_started && !s->started) |
cc377381 | 910 | return false; |
932e3ee7 | 911 | |
9444b1f2 | 912 | if (!s->user) |
cc377381 | 913 | return false; |
9444b1f2 | 914 | |
932e3ee7 | 915 | if (s->fifo_fd >= 0) { |
5f41d1f1 | 916 | if (pipe_eof(s->fifo_fd) <= 0) |
cc377381 | 917 | return true; |
20263082 LP |
918 | } |
919 | ||
cc377381 LP |
920 | if (s->scope_job && manager_job_is_active(s->manager, s->scope_job)) |
921 | return true; | |
20263082 | 922 | |
cc377381 LP |
923 | if (s->scope && manager_unit_is_active(s->manager, s->scope)) |
924 | return true; | |
20263082 | 925 | |
cc377381 | 926 | return false; |
20263082 LP |
927 | } |
928 | ||
14c3baca LP |
929 | void session_add_to_gc_queue(Session *s) { |
930 | assert(s); | |
931 | ||
932 | if (s->in_gc_queue) | |
933 | return; | |
934 | ||
71fda00f | 935 | LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s); |
14c3baca LP |
936 | s->in_gc_queue = true; |
937 | } | |
938 | ||
0604381b LP |
939 | SessionState session_get_state(Session *s) { |
940 | assert(s); | |
941 | ||
8fe63cd4 | 942 | /* always check closing first */ |
5f41d1f1 LP |
943 | if (s->stopping || s->timer_event_source) |
944 | return SESSION_CLOSING; | |
945 | ||
8fe63cd4 | 946 | if (s->scope_job || s->fifo_fd < 0) |
405e0255 | 947 | return SESSION_OPENING; |
fb6becb4 | 948 | |
0604381b LP |
949 | if (session_is_active(s)) |
950 | return SESSION_ACTIVE; | |
951 | ||
952 | return SESSION_ONLINE; | |
953 | } | |
954 | ||
de07ab16 | 955 | int session_kill(Session *s, KillWho who, int signo) { |
de07ab16 LP |
956 | assert(s); |
957 | ||
fb6becb4 | 958 | if (!s->scope) |
de07ab16 LP |
959 | return -ESRCH; |
960 | ||
fb6becb4 | 961 | return manager_kill_unit(s->manager, s->scope, who, signo, NULL); |
de07ab16 LP |
962 | } |
963 | ||
90a18413 | 964 | static int session_open_vt(Session *s) { |
5f41d1f1 | 965 | char path[sizeof("/dev/tty") + DECIMAL_STR_MAX(s->vtnr)]; |
90a18413 | 966 | |
baccf3e4 OB |
967 | if (s->vtnr < 1) |
968 | return -ENODEV; | |
90a18413 DH |
969 | |
970 | if (s->vtfd >= 0) | |
971 | return s->vtfd; | |
972 | ||
92bd5ff3 | 973 | sprintf(path, "/dev/tty%u", s->vtnr); |
90a18413 | 974 | s->vtfd = open(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY); |
4a62c710 MS |
975 | if (s->vtfd < 0) |
976 | return log_error_errno(errno, "cannot open VT %s of session %s: %m", path, s->id); | |
90a18413 DH |
977 | |
978 | return s->vtfd; | |
979 | } | |
980 | ||
baccf3e4 | 981 | int session_prepare_vt(Session *s) { |
90a18413 DH |
982 | int vt, r; |
983 | struct vt_mode mode = { 0 }; | |
90a18413 | 984 | |
baccf3e4 OB |
985 | if (s->vtnr < 1) |
986 | return 0; | |
987 | ||
90a18413 DH |
988 | vt = session_open_vt(s); |
989 | if (vt < 0) | |
baccf3e4 | 990 | return vt; |
90a18413 | 991 | |
d6176c6c | 992 | r = fchown(vt, s->user->uid, -1); |
baccf3e4 OB |
993 | if (r < 0) { |
994 | r = -errno; | |
56f64d95 | 995 | log_error_errno(errno, "Cannot change owner of /dev/tty%u: %m", s->vtnr); |
d6176c6c | 996 | goto error; |
baccf3e4 | 997 | } |
d6176c6c | 998 | |
90a18413 | 999 | r = ioctl(vt, KDSKBMODE, K_OFF); |
baccf3e4 OB |
1000 | if (r < 0) { |
1001 | r = -errno; | |
56f64d95 | 1002 | log_error_errno(errno, "Cannot set K_OFF on /dev/tty%u: %m", s->vtnr); |
90a18413 | 1003 | goto error; |
baccf3e4 | 1004 | } |
90a18413 DH |
1005 | |
1006 | r = ioctl(vt, KDSETMODE, KD_GRAPHICS); | |
baccf3e4 OB |
1007 | if (r < 0) { |
1008 | r = -errno; | |
56f64d95 | 1009 | log_error_errno(errno, "Cannot set KD_GRAPHICS on /dev/tty%u: %m", s->vtnr); |
90a18413 | 1010 | goto error; |
baccf3e4 | 1011 | } |
90a18413 | 1012 | |
90a18413 DH |
1013 | /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS. |
1014 | * So we need a dummy handler here which just acknowledges *all* VT | |
1015 | * switch requests. */ | |
1016 | mode.mode = VT_PROCESS; | |
92683ad2 DH |
1017 | mode.relsig = SIGRTMIN; |
1018 | mode.acqsig = SIGRTMIN + 1; | |
90a18413 | 1019 | r = ioctl(vt, VT_SETMODE, &mode); |
baccf3e4 OB |
1020 | if (r < 0) { |
1021 | r = -errno; | |
56f64d95 | 1022 | log_error_errno(errno, "Cannot set VT_PROCESS on /dev/tty%u: %m", s->vtnr); |
90a18413 | 1023 | goto error; |
baccf3e4 | 1024 | } |
90a18413 | 1025 | |
baccf3e4 | 1026 | return 0; |
90a18413 DH |
1027 | |
1028 | error: | |
90a18413 | 1029 | session_restore_vt(s); |
baccf3e4 | 1030 | return r; |
90a18413 DH |
1031 | } |
1032 | ||
1033 | void session_restore_vt(Session *s) { | |
a0eb2a75 | 1034 | _cleanup_free_ char *utf8 = NULL; |
90a18413 DH |
1035 | int vt, kb = K_XLATE; |
1036 | struct vt_mode mode = { 0 }; | |
1037 | ||
1038 | vt = session_open_vt(s); | |
1039 | if (vt < 0) | |
1040 | return; | |
1041 | ||
2bf10523 | 1042 | (void) ioctl(vt, KDSETMODE, KD_TEXT); |
90a18413 DH |
1043 | |
1044 | if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8) >= 0 && *utf8 == '1') | |
1045 | kb = K_UNICODE; | |
03e334a1 | 1046 | |
2bf10523 | 1047 | (void) ioctl(vt, KDSKBMODE, kb); |
90a18413 DH |
1048 | |
1049 | mode.mode = VT_AUTO; | |
2bf10523 | 1050 | (void) ioctl(vt, VT_SETMODE, &mode); |
90a18413 | 1051 | |
d6176c6c RS |
1052 | fchown(vt, 0, -1); |
1053 | ||
03e334a1 | 1054 | s->vtfd = safe_close(s->vtfd); |
90a18413 DH |
1055 | } |
1056 | ||
2ec3ff66 | 1057 | void session_leave_vt(Session *s) { |
ce540a24 DH |
1058 | int r; |
1059 | ||
2ec3ff66 DH |
1060 | assert(s); |
1061 | ||
1062 | /* This is called whenever we get a VT-switch signal from the kernel. | |
1063 | * We acknowledge all of them unconditionally. Note that session are | |
1064 | * free to overwrite those handlers and we only register them for | |
1065 | * sessions with controllers. Legacy sessions are not affected. | |
1066 | * However, if we switch from a non-legacy to a legacy session, we must | |
1067 | * make sure to pause all device before acknowledging the switch. We | |
1068 | * process the real switch only after we are notified via sysfs, so the | |
1069 | * legacy session might have already started using the devices. If we | |
1070 | * don't pause the devices before the switch, we might confuse the | |
1071 | * session we switch to. */ | |
1072 | ||
1073 | if (s->vtfd < 0) | |
1074 | return; | |
1075 | ||
1076 | session_device_pause_all(s); | |
ce540a24 DH |
1077 | r = ioctl(s->vtfd, VT_RELDISP, 1); |
1078 | if (r < 0) | |
56f64d95 | 1079 | log_debug_errno(errno, "Cannot release VT of session %s: %m", s->id); |
2ec3ff66 DH |
1080 | } |
1081 | ||
cc377381 | 1082 | bool session_is_controller(Session *s, const char *sender) { |
ae5e06bd DH |
1083 | assert(s); |
1084 | ||
1085 | return streq_ptr(s->controller, sender); | |
1086 | } | |
1087 | ||
b12e5615 DH |
1088 | static void session_release_controller(Session *s, bool notify) { |
1089 | _cleanup_free_ char *name = NULL; | |
6d33772f DH |
1090 | SessionDevice *sd; |
1091 | ||
b12e5615 DH |
1092 | if (!s->controller) |
1093 | return; | |
6d33772f | 1094 | |
b12e5615 | 1095 | name = s->controller; |
90a18413 | 1096 | |
b12e5615 DH |
1097 | /* By resetting the controller before releasing the devices, we won't |
1098 | * send notification signals. This avoids sending useless notifications | |
1099 | * if the controller is released on disconnects. */ | |
1100 | if (!notify) | |
1101 | s->controller = NULL; | |
6d33772f | 1102 | |
b12e5615 DH |
1103 | while ((sd = hashmap_first(s->devices))) |
1104 | session_device_free(sd); | |
1105 | ||
1106 | s->controller = NULL; | |
1107 | manager_drop_busname(s->manager, name); | |
6d33772f DH |
1108 | } |
1109 | ||
ae5e06bd | 1110 | int session_set_controller(Session *s, const char *sender, bool force) { |
b12e5615 | 1111 | _cleanup_free_ char *name = NULL; |
ae5e06bd DH |
1112 | int r; |
1113 | ||
1114 | assert(s); | |
1115 | assert(sender); | |
1116 | ||
1117 | if (session_is_controller(s, sender)) | |
1118 | return 0; | |
1119 | if (s->controller && !force) | |
1120 | return -EBUSY; | |
1121 | ||
b12e5615 DH |
1122 | name = strdup(sender); |
1123 | if (!name) | |
ae5e06bd DH |
1124 | return -ENOMEM; |
1125 | ||
b12e5615 DH |
1126 | r = manager_watch_busname(s->manager, name); |
1127 | if (r) | |
ae5e06bd | 1128 | return r; |
ae5e06bd | 1129 | |
90a18413 DH |
1130 | /* When setting a session controller, we forcibly mute the VT and set |
1131 | * it into graphics-mode. Applications can override that by changing | |
1132 | * VT state after calling TakeControl(). However, this serves as a good | |
1133 | * default and well-behaving controllers can now ignore VTs entirely. | |
1134 | * Note that we reset the VT on ReleaseControl() and if the controller | |
1135 | * exits. | |
1136 | * If logind crashes/restarts, we restore the controller during restart | |
1137 | * or reset the VT in case it crashed/exited, too. */ | |
baccf3e4 | 1138 | r = session_prepare_vt(s); |
13f493dc | 1139 | if (r < 0) { |
b12e5615 | 1140 | manager_drop_busname(s->manager, name); |
baccf3e4 | 1141 | return r; |
13f493dc | 1142 | } |
baccf3e4 | 1143 | |
b12e5615 DH |
1144 | session_release_controller(s, true); |
1145 | s->controller = name; | |
1146 | name = NULL; | |
1147 | session_save(s); | |
90a18413 | 1148 | |
ae5e06bd DH |
1149 | return 0; |
1150 | } | |
1151 | ||
1152 | void session_drop_controller(Session *s) { | |
1153 | assert(s); | |
1154 | ||
1155 | if (!s->controller) | |
1156 | return; | |
1157 | ||
b12e5615 DH |
1158 | session_release_controller(s, false); |
1159 | session_save(s); | |
1160 | session_restore_vt(s); | |
ae5e06bd DH |
1161 | } |
1162 | ||
fb6becb4 LP |
1163 | static const char* const session_state_table[_SESSION_STATE_MAX] = { |
1164 | [SESSION_OPENING] = "opening", | |
0604381b LP |
1165 | [SESSION_ONLINE] = "online", |
1166 | [SESSION_ACTIVE] = "active", | |
1167 | [SESSION_CLOSING] = "closing" | |
1168 | }; | |
1169 | ||
1170 | DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState); | |
1171 | ||
20263082 | 1172 | static const char* const session_type_table[_SESSION_TYPE_MAX] = { |
2c5859af | 1173 | [SESSION_UNSPECIFIED] = "unspecified", |
3f49d45a | 1174 | [SESSION_TTY] = "tty", |
98a28fef | 1175 | [SESSION_X11] = "x11", |
d9eb81f9 | 1176 | [SESSION_WAYLAND] = "wayland", |
9541666b | 1177 | [SESSION_MIR] = "mir", |
e9e74f28 | 1178 | [SESSION_WEB] = "web", |
20263082 LP |
1179 | }; |
1180 | ||
1181 | DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType); | |
de07ab16 | 1182 | |
55efac6c LP |
1183 | static const char* const session_class_table[_SESSION_CLASS_MAX] = { |
1184 | [SESSION_USER] = "user", | |
1185 | [SESSION_GREETER] = "greeter", | |
e2acb67b LP |
1186 | [SESSION_LOCK_SCREEN] = "lock-screen", |
1187 | [SESSION_BACKGROUND] = "background" | |
55efac6c LP |
1188 | }; |
1189 | ||
1190 | DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass); | |
1191 | ||
de07ab16 LP |
1192 | static const char* const kill_who_table[_KILL_WHO_MAX] = { |
1193 | [KILL_LEADER] = "leader", | |
1194 | [KILL_ALL] = "all" | |
1195 | }; | |
1196 | ||
1197 | DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); |