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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 | 23 | #include <fcntl.h> |
90a18413 | 24 | #include <linux/kd.h> |
4f5dd394 | 25 | #include <linux/vt.h> |
90a18413 | 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" |
4f5dd394 | 32 | |
430f0182 | 33 | #include "audit-util.h" |
cc377381 | 34 | #include "bus-error.h" |
4f5dd394 LP |
35 | #include "bus-util.h" |
36 | #include "escape.h" | |
3ffd4af2 | 37 | #include "fd-util.h" |
c004493c | 38 | #include "fd-util.h" |
4f5dd394 | 39 | #include "fileio.h" |
6482f626 | 40 | #include "formats-util.h" |
c004493c | 41 | #include "io-util.h" |
3ffd4af2 | 42 | #include "logind-session.h" |
4f5dd394 | 43 | #include "mkdir.h" |
6bedfcbb | 44 | #include "parse-util.h" |
4f5dd394 | 45 | #include "path-util.h" |
8b43440b | 46 | #include "string-table.h" |
288a74cc | 47 | #include "terminal-util.h" |
b1d4f8e1 | 48 | #include "user-util.h" |
4f5dd394 | 49 | #include "util.h" |
20263082 | 50 | |
5f41d1f1 LP |
51 | #define RELEASE_USEC (20*USEC_PER_SEC) |
52 | ||
53 | static void session_remove_fifo(Session *s); | |
54 | ||
9444b1f2 | 55 | Session* session_new(Manager *m, const char *id) { |
20263082 LP |
56 | Session *s; |
57 | ||
58 | assert(m); | |
59 | assert(id); | |
4b549144 | 60 | assert(session_id_valid(id)); |
20263082 | 61 | |
14c3baca | 62 | s = new0(Session, 1); |
20263082 LP |
63 | if (!s) |
64 | return NULL; | |
65 | ||
98a28fef | 66 | s->state_file = strappend("/run/systemd/sessions/", id); |
20263082 LP |
67 | if (!s->state_file) { |
68 | free(s); | |
69 | return NULL; | |
70 | } | |
71 | ||
d5099efc | 72 | s->devices = hashmap_new(&devt_hash_ops); |
118ecf32 DH |
73 | if (!s->devices) { |
74 | free(s->state_file); | |
75 | free(s); | |
76 | return NULL; | |
77 | } | |
78 | ||
2b6bf07d | 79 | s->id = basename(s->state_file); |
20263082 LP |
80 | |
81 | if (hashmap_put(m->sessions, s->id, s) < 0) { | |
118ecf32 | 82 | hashmap_free(s->devices); |
f8e2fb7b | 83 | free(s->state_file); |
20263082 LP |
84 | free(s); |
85 | return NULL; | |
86 | } | |
87 | ||
88 | s->manager = m; | |
932e3ee7 | 89 | s->fifo_fd = -1; |
90a18413 | 90 | s->vtfd = -1; |
20263082 LP |
91 | |
92 | return s; | |
93 | } | |
94 | ||
95 | void session_free(Session *s) { | |
118ecf32 DH |
96 | SessionDevice *sd; |
97 | ||
20263082 LP |
98 | assert(s); |
99 | ||
14c3baca | 100 | if (s->in_gc_queue) |
71fda00f | 101 | LIST_REMOVE(gc_queue, s->manager->session_gc_queue, s); |
14c3baca | 102 | |
5f41d1f1 LP |
103 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
104 | ||
cc377381 LP |
105 | session_remove_fifo(s); |
106 | ||
ae5e06bd DH |
107 | session_drop_controller(s); |
108 | ||
118ecf32 DH |
109 | while ((sd = hashmap_first(s->devices))) |
110 | session_device_free(sd); | |
111 | ||
112 | hashmap_free(s->devices); | |
113 | ||
20263082 | 114 | if (s->user) { |
71fda00f | 115 | LIST_REMOVE(sessions_by_user, s->user->sessions, s); |
20263082 LP |
116 | |
117 | if (s->user->display == s) | |
118 | s->user->display = NULL; | |
119 | } | |
120 | ||
9418f147 LP |
121 | if (s->seat) { |
122 | if (s->seat->active == s) | |
123 | s->seat->active = NULL; | |
d7bd01b5 DH |
124 | if (s->seat->pending_switch == s) |
125 | s->seat->pending_switch = NULL; | |
9418f147 | 126 | |
49e6fdbf | 127 | seat_evict_position(s->seat, s); |
71fda00f | 128 | LIST_REMOVE(sessions_by_seat, s->seat->sessions, s); |
9418f147 | 129 | } |
20263082 | 130 | |
fb6becb4 LP |
131 | if (s->scope) { |
132 | hashmap_remove(s->manager->session_units, s->scope); | |
133 | free(s->scope); | |
134 | } | |
135 | ||
136 | free(s->scope_job); | |
1713813d | 137 | |
cc377381 | 138 | sd_bus_message_unref(s->create_message); |
20263082 LP |
139 | |
140 | free(s->tty); | |
141 | free(s->display); | |
142 | free(s->remote_host); | |
3f49d45a | 143 | free(s->remote_user); |
98a28fef | 144 | free(s->service); |
a4cd87e9 | 145 | free(s->desktop); |
20263082 LP |
146 | |
147 | hashmap_remove(s->manager->sessions, s->id); | |
98a28fef | 148 | |
d2f92cdf | 149 | free(s->state_file); |
20263082 LP |
150 | free(s); |
151 | } | |
152 | ||
9444b1f2 LP |
153 | void session_set_user(Session *s, User *u) { |
154 | assert(s); | |
155 | assert(!s->user); | |
156 | ||
157 | s->user = u; | |
71fda00f | 158 | LIST_PREPEND(sessions_by_user, u->sessions, s); |
9444b1f2 LP |
159 | } |
160 | ||
20263082 | 161 | int session_save(Session *s) { |
507f22bd | 162 | _cleanup_free_ char *temp_path = NULL; |
cc377381 | 163 | _cleanup_fclose_ FILE *f = NULL; |
20263082 LP |
164 | int r = 0; |
165 | ||
166 | assert(s); | |
167 | ||
9444b1f2 LP |
168 | if (!s->user) |
169 | return -ESTALE; | |
170 | ||
accaeded LP |
171 | if (!s->started) |
172 | return 0; | |
173 | ||
d2e54fae | 174 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
20263082 | 175 | if (r < 0) |
dacd6cee | 176 | goto fail; |
20263082 | 177 | |
14c3baca LP |
178 | r = fopen_temporary(s->state_file, &f, &temp_path); |
179 | if (r < 0) | |
dacd6cee | 180 | goto fail; |
20263082 LP |
181 | |
182 | assert(s->user); | |
183 | ||
14c3baca LP |
184 | fchmod(fileno(f), 0644); |
185 | ||
20263082 LP |
186 | fprintf(f, |
187 | "# This is private data. Do not parse.\n" | |
90b2de37 | 188 | "UID="UID_FMT"\n" |
20263082 LP |
189 | "USER=%s\n" |
190 | "ACTIVE=%i\n" | |
0604381b | 191 | "STATE=%s\n" |
fb6becb4 | 192 | "REMOTE=%i\n", |
90b2de37 | 193 | s->user->uid, |
20263082 LP |
194 | s->user->name, |
195 | session_is_active(s), | |
0604381b | 196 | session_state_to_string(session_get_state(s)), |
fb6becb4 | 197 | s->remote); |
20263082 | 198 | |
a91e4e53 | 199 | if (s->type >= 0) |
507f22bd | 200 | fprintf(f, "TYPE=%s\n", session_type_to_string(s->type)); |
a91e4e53 | 201 | |
55efac6c | 202 | if (s->class >= 0) |
507f22bd | 203 | fprintf(f, "CLASS=%s\n", session_class_to_string(s->class)); |
55efac6c | 204 | |
fb6becb4 LP |
205 | if (s->scope) |
206 | fprintf(f, "SCOPE=%s\n", s->scope); | |
fb6becb4 LP |
207 | if (s->scope_job) |
208 | fprintf(f, "SCOPE_JOB=%s\n", s->scope_job); | |
20263082 | 209 | |
932e3ee7 | 210 | if (s->fifo_path) |
507f22bd | 211 | fprintf(f, "FIFO=%s\n", s->fifo_path); |
932e3ee7 | 212 | |
20263082 | 213 | if (s->seat) |
507f22bd | 214 | fprintf(f, "SEAT=%s\n", s->seat->id); |
20263082 LP |
215 | |
216 | if (s->tty) | |
507f22bd | 217 | fprintf(f, "TTY=%s\n", s->tty); |
20263082 LP |
218 | |
219 | if (s->display) | |
507f22bd | 220 | fprintf(f, "DISPLAY=%s\n", s->display); |
20263082 | 221 | |
558c6490 LP |
222 | if (s->remote_host) { |
223 | _cleanup_free_ char *escaped; | |
224 | ||
225 | escaped = cescape(s->remote_host); | |
226 | if (!escaped) { | |
227 | r = -ENOMEM; | |
dacd6cee | 228 | goto fail; |
558c6490 LP |
229 | } |
230 | ||
231 | fprintf(f, "REMOTE_HOST=%s\n", escaped); | |
232 | } | |
233 | ||
234 | if (s->remote_user) { | |
235 | _cleanup_free_ char *escaped; | |
236 | ||
237 | escaped = cescape(s->remote_user); | |
238 | if (!escaped) { | |
239 | r = -ENOMEM; | |
dacd6cee | 240 | goto fail; |
558c6490 LP |
241 | } |
242 | ||
243 | fprintf(f, "REMOTE_USER=%s\n", escaped); | |
244 | } | |
245 | ||
246 | if (s->service) { | |
247 | _cleanup_free_ char *escaped; | |
20263082 | 248 | |
558c6490 LP |
249 | escaped = cescape(s->service); |
250 | if (!escaped) { | |
251 | r = -ENOMEM; | |
dacd6cee | 252 | goto fail; |
558c6490 LP |
253 | } |
254 | ||
255 | fprintf(f, "SERVICE=%s\n", escaped); | |
256 | } | |
3f49d45a | 257 | |
558c6490 LP |
258 | if (s->desktop) { |
259 | _cleanup_free_ char *escaped; | |
98a28fef | 260 | |
558c6490 LP |
261 | |
262 | escaped = cescape(s->desktop); | |
263 | if (!escaped) { | |
264 | r = -ENOMEM; | |
dacd6cee | 265 | goto fail; |
558c6490 LP |
266 | } |
267 | ||
268 | fprintf(f, "DESKTOP=%s\n", escaped); | |
269 | } | |
a4cd87e9 | 270 | |
bf7825ae | 271 | if (s->seat && seat_has_vts(s->seat)) |
92bd5ff3 | 272 | fprintf(f, "VTNR=%u\n", s->vtnr); |
20263082 | 273 | |
49e6fdbf | 274 | if (!s->vtnr) |
e6494a07 | 275 | fprintf(f, "POSITION=%u\n", s->position); |
49e6fdbf | 276 | |
20263082 | 277 | if (s->leader > 0) |
90b2de37 | 278 | fprintf(f, "LEADER="PID_FMT"\n", s->leader); |
20263082 LP |
279 | |
280 | if (s->audit_id > 0) | |
507f22bd | 281 | fprintf(f, "AUDIT=%"PRIu32"\n", s->audit_id); |
20263082 | 282 | |
9444b1f2 LP |
283 | if (dual_timestamp_is_set(&s->timestamp)) |
284 | fprintf(f, | |
90b2de37 ZJS |
285 | "REALTIME="USEC_FMT"\n" |
286 | "MONOTONIC="USEC_FMT"\n", | |
287 | s->timestamp.realtime, | |
288 | s->timestamp.monotonic); | |
9444b1f2 | 289 | |
6d33772f DH |
290 | if (s->controller) |
291 | fprintf(f, "CONTROLLER=%s\n", s->controller); | |
292 | ||
dacd6cee LP |
293 | r = fflush_and_check(f); |
294 | if (r < 0) | |
295 | goto fail; | |
14c3baca | 296 | |
dacd6cee | 297 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 298 | r = -errno; |
dacd6cee | 299 | goto fail; |
20263082 LP |
300 | } |
301 | ||
dacd6cee LP |
302 | return 0; |
303 | ||
304 | fail: | |
305 | (void) unlink(s->state_file); | |
14c3baca | 306 | |
dacd6cee LP |
307 | if (temp_path) |
308 | (void) unlink(temp_path); | |
309 | ||
310 | return log_error_errno(r, "Failed to save session data %s: %m", s->state_file); | |
20263082 LP |
311 | } |
312 | ||
dacd6cee | 313 | |
20263082 | 314 | int session_load(Session *s) { |
9444b1f2 | 315 | _cleanup_free_ char *remote = NULL, |
a185c5aa LP |
316 | *seat = NULL, |
317 | *vtnr = NULL, | |
be94d954 | 318 | *state = NULL, |
e6494a07 | 319 | *position = NULL, |
a185c5aa | 320 | *leader = NULL, |
55efac6c | 321 | *type = NULL, |
9444b1f2 LP |
322 | *class = NULL, |
323 | *uid = NULL, | |
324 | *realtime = NULL, | |
6d33772f DH |
325 | *monotonic = NULL, |
326 | *controller = NULL; | |
a185c5aa LP |
327 | |
328 | int k, r; | |
329 | ||
20263082 LP |
330 | assert(s); |
331 | ||
a185c5aa LP |
332 | r = parse_env_file(s->state_file, NEWLINE, |
333 | "REMOTE", &remote, | |
fb6becb4 LP |
334 | "SCOPE", &s->scope, |
335 | "SCOPE_JOB", &s->scope_job, | |
932e3ee7 | 336 | "FIFO", &s->fifo_path, |
a185c5aa LP |
337 | "SEAT", &seat, |
338 | "TTY", &s->tty, | |
339 | "DISPLAY", &s->display, | |
340 | "REMOTE_HOST", &s->remote_host, | |
341 | "REMOTE_USER", &s->remote_user, | |
98a28fef | 342 | "SERVICE", &s->service, |
a4cd87e9 | 343 | "DESKTOP", &s->desktop, |
a185c5aa | 344 | "VTNR", &vtnr, |
be94d954 | 345 | "STATE", &state, |
e6494a07 | 346 | "POSITION", &position, |
a185c5aa | 347 | "LEADER", &leader, |
a91e4e53 | 348 | "TYPE", &type, |
55efac6c | 349 | "CLASS", &class, |
9444b1f2 LP |
350 | "UID", &uid, |
351 | "REALTIME", &realtime, | |
352 | "MONOTONIC", &monotonic, | |
6d33772f | 353 | "CONTROLLER", &controller, |
a185c5aa LP |
354 | NULL); |
355 | ||
f647962d MS |
356 | if (r < 0) |
357 | return log_error_errno(r, "Failed to read %s: %m", s->state_file); | |
9444b1f2 LP |
358 | |
359 | if (!s->user) { | |
360 | uid_t u; | |
361 | User *user; | |
362 | ||
363 | if (!uid) { | |
364 | log_error("UID not specified for session %s", s->id); | |
365 | return -ENOENT; | |
366 | } | |
367 | ||
368 | r = parse_uid(uid, &u); | |
369 | if (r < 0) { | |
370 | log_error("Failed to parse UID value %s for session %s.", uid, s->id); | |
371 | return r; | |
372 | } | |
373 | ||
8cb4ab00 | 374 | user = hashmap_get(s->manager->users, UID_TO_PTR(u)); |
9444b1f2 LP |
375 | if (!user) { |
376 | log_error("User of session %s not known.", s->id); | |
377 | return -ENOENT; | |
378 | } | |
379 | ||
380 | session_set_user(s, user); | |
381 | } | |
a185c5aa LP |
382 | |
383 | if (remote) { | |
384 | k = parse_boolean(remote); | |
385 | if (k >= 0) | |
386 | s->remote = k; | |
387 | } | |
388 | ||
c506027a DH |
389 | if (vtnr) |
390 | safe_atou(vtnr, &s->vtnr); | |
391 | ||
9418f147 | 392 | if (seat && !s->seat) { |
a185c5aa LP |
393 | Seat *o; |
394 | ||
395 | o = hashmap_get(s->manager->seats, seat); | |
396 | if (o) | |
c506027a DH |
397 | r = seat_attach_session(o, s); |
398 | if (!o || r < 0) | |
399 | log_error("Cannot attach session %s to seat %s", s->id, seat); | |
a185c5aa LP |
400 | } |
401 | ||
c506027a DH |
402 | if (!s->seat || !seat_has_vts(s->seat)) |
403 | s->vtnr = 0; | |
a185c5aa | 404 | |
e6494a07 | 405 | if (position && s->seat) { |
49e6fdbf DH |
406 | unsigned int npos; |
407 | ||
e6494a07 | 408 | safe_atou(position, &npos); |
49e6fdbf DH |
409 | seat_claim_position(s->seat, s, npos); |
410 | } | |
411 | ||
a185c5aa | 412 | if (leader) { |
f8e2fb7b LP |
413 | k = parse_pid(leader, &s->leader); |
414 | if (k >= 0) | |
415 | audit_session_from_pid(s->leader, &s->audit_id); | |
a185c5aa LP |
416 | } |
417 | ||
a91e4e53 LP |
418 | if (type) { |
419 | SessionType t; | |
420 | ||
421 | t = session_type_from_string(type); | |
422 | if (t >= 0) | |
423 | s->type = t; | |
424 | } | |
425 | ||
55efac6c LP |
426 | if (class) { |
427 | SessionClass c; | |
428 | ||
429 | c = session_class_from_string(class); | |
430 | if (c >= 0) | |
431 | s->class = c; | |
432 | } | |
433 | ||
be94d954 MP |
434 | if (state && streq(state, "closing")) |
435 | s->stopping = true; | |
436 | ||
b4f78aea LP |
437 | if (s->fifo_path) { |
438 | int fd; | |
439 | ||
440 | /* If we open an unopened pipe for reading we will not | |
441 | get an EOF. to trigger an EOF we hence open it for | |
be94d954 MP |
442 | writing, but close it right away which then will |
443 | trigger the EOF. This will happen immediately if no | |
444 | other process has the FIFO open for writing, i. e. | |
445 | when the session died before logind (re)started. */ | |
b4f78aea LP |
446 | |
447 | fd = session_create_fifo(s); | |
03e334a1 | 448 | safe_close(fd); |
b4f78aea LP |
449 | } |
450 | ||
9444b1f2 LP |
451 | if (realtime) { |
452 | unsigned long long l; | |
453 | if (sscanf(realtime, "%llu", &l) > 0) | |
454 | s->timestamp.realtime = l; | |
455 | } | |
456 | ||
457 | if (monotonic) { | |
458 | unsigned long long l; | |
459 | if (sscanf(monotonic, "%llu", &l) > 0) | |
460 | s->timestamp.monotonic = l; | |
461 | } | |
a185c5aa | 462 | |
6d33772f DH |
463 | if (controller) { |
464 | if (bus_name_has_owner(s->manager->bus, controller, NULL) > 0) | |
465 | session_set_controller(s, controller, false); | |
90a18413 DH |
466 | else |
467 | session_restore_vt(s); | |
6d33772f DH |
468 | } |
469 | ||
a185c5aa | 470 | return r; |
20263082 LP |
471 | } |
472 | ||
473 | int session_activate(Session *s) { | |
d7bd01b5 DH |
474 | unsigned int num_pending; |
475 | ||
20263082 | 476 | assert(s); |
9444b1f2 | 477 | assert(s->user); |
20263082 | 478 | |
20263082 | 479 | if (!s->seat) |
15411c0c | 480 | return -EOPNOTSUPP; |
20263082 LP |
481 | |
482 | if (s->seat->active == s) | |
483 | return 0; | |
484 | ||
d7bd01b5 DH |
485 | /* on seats with VTs, we let VTs manage session-switching */ |
486 | if (seat_has_vts(s->seat)) { | |
92bd5ff3 | 487 | if (!s->vtnr) |
15411c0c | 488 | return -EOPNOTSUPP; |
d7bd01b5 DH |
489 | |
490 | return chvt(s->vtnr); | |
491 | } | |
492 | ||
493 | /* On seats without VTs, we implement session-switching in logind. We | |
494 | * try to pause all session-devices and wait until the session | |
495 | * controller acknowledged them. Once all devices are asleep, we simply | |
496 | * switch the active session and be done. | |
497 | * We save the session we want to switch to in seat->pending_switch and | |
498 | * seat_complete_switch() will perform the final switch. */ | |
499 | ||
500 | s->seat->pending_switch = s; | |
501 | ||
502 | /* if no devices are running, immediately perform the session switch */ | |
503 | num_pending = session_device_try_pause_all(s); | |
504 | if (!num_pending) | |
505 | seat_complete_switch(s->seat); | |
20263082 | 506 | |
d7bd01b5 | 507 | return 0; |
20263082 LP |
508 | } |
509 | ||
fb6becb4 | 510 | static int session_start_scope(Session *s) { |
98a28fef LP |
511 | int r; |
512 | ||
513 | assert(s); | |
9444b1f2 | 514 | assert(s->user); |
fb6becb4 | 515 | assert(s->user->slice); |
98a28fef | 516 | |
fb6becb4 | 517 | if (!s->scope) { |
cc377381 | 518 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
d0af76e6 | 519 | _cleanup_free_ char *description = NULL; |
39883f62 | 520 | char *scope, *job = NULL; |
d0af76e6 | 521 | |
405e0255 LP |
522 | description = strjoin("Session ", s->id, " of user ", s->user->name, NULL); |
523 | if (!description) | |
524 | return log_oom(); | |
525 | ||
d0af76e6 LP |
526 | scope = strjoin("session-", s->id, ".scope", NULL); |
527 | if (!scope) | |
ae018d9b LP |
528 | return log_oom(); |
529 | ||
646e392e | 530 | r = manager_start_scope(s->manager, scope, s->leader, s->user->slice, description, "systemd-logind.service", "systemd-user-sessions.service", &error, &job); |
d0af76e6 | 531 | if (r < 0) { |
042f5988 | 532 | log_error("Failed to start session scope %s: %s %s", |
cc377381 | 533 | scope, bus_error_message(&error, r), error.name); |
d0af76e6 | 534 | free(scope); |
f2d4f98d | 535 | return r; |
d0af76e6 LP |
536 | } else { |
537 | s->scope = scope; | |
538 | ||
539 | free(s->scope_job); | |
540 | s->scope_job = job; | |
541 | } | |
20263082 LP |
542 | } |
543 | ||
d0af76e6 LP |
544 | if (s->scope) |
545 | hashmap_put(s->manager->session_units, s->scope, s); | |
546 | ||
20263082 LP |
547 | return 0; |
548 | } | |
549 | ||
550 | int session_start(Session *s) { | |
551 | int r; | |
552 | ||
553 | assert(s); | |
9444b1f2 LP |
554 | |
555 | if (!s->user) | |
556 | return -ESTALE; | |
20263082 | 557 | |
9418f147 LP |
558 | if (s->started) |
559 | return 0; | |
560 | ||
ed18b08b LP |
561 | r = user_start(s->user); |
562 | if (r < 0) | |
563 | return r; | |
564 | ||
fb6becb4 LP |
565 | /* Create cgroup */ |
566 | r = session_start_scope(s); | |
567 | if (r < 0) | |
568 | return r; | |
569 | ||
d9eb81f9 | 570 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 571 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_START), |
877d54e9 LP |
572 | "SESSION_ID=%s", s->id, |
573 | "USER_ID=%s", s->user->name, | |
de0671ee | 574 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 575 | LOG_MESSAGE("New session %s of user %s.", s->id, s->user->name), |
877d54e9 | 576 | NULL); |
98a28fef | 577 | |
9444b1f2 LP |
578 | if (!dual_timestamp_is_set(&s->timestamp)) |
579 | dual_timestamp_get(&s->timestamp); | |
14c3baca | 580 | |
e9816c48 LP |
581 | if (s->seat) |
582 | seat_read_active_vt(s->seat); | |
583 | ||
9418f147 LP |
584 | s->started = true; |
585 | ||
952d3260 LP |
586 | user_elect_display(s->user); |
587 | ||
5f41d1f1 | 588 | /* Save data */ |
e9816c48 | 589 | session_save(s); |
7f7bb946 | 590 | user_save(s->user); |
5f41d1f1 LP |
591 | if (s->seat) |
592 | seat_save(s->seat); | |
e9816c48 | 593 | |
5f41d1f1 | 594 | /* Send signals */ |
da119395 | 595 | session_send_signal(s, true); |
952d3260 | 596 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 LP |
597 | if (s->seat) { |
598 | if (s->seat->active == s) | |
cc377381 | 599 | seat_send_changed(s->seat, "Sessions", "ActiveSession", NULL); |
9418f147 | 600 | else |
cc377381 | 601 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
602 | } |
603 | ||
20263082 LP |
604 | return 0; |
605 | } | |
606 | ||
9bb69af4 | 607 | static int session_stop_scope(Session *s, bool force) { |
cc377381 | 608 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
39883f62 | 609 | char *job = NULL; |
20263082 | 610 | int r; |
20263082 LP |
611 | |
612 | assert(s); | |
613 | ||
fb6becb4 LP |
614 | if (!s->scope) |
615 | return 0; | |
9b221b63 | 616 | |
9bb69af4 | 617 | if (force || manager_shall_kill(s->manager, s->user->name)) { |
5f41d1f1 LP |
618 | r = manager_stop_unit(s->manager, s->scope, &error, &job); |
619 | if (r < 0) { | |
620 | log_error("Failed to stop session scope: %s", bus_error_message(&error, r)); | |
621 | return r; | |
622 | } | |
20263082 | 623 | |
5f41d1f1 LP |
624 | free(s->scope_job); |
625 | s->scope_job = job; | |
626 | } else { | |
627 | r = manager_abandon_scope(s->manager, s->scope, &error); | |
628 | if (r < 0) { | |
629 | log_error("Failed to abandon session scope: %s", bus_error_message(&error, r)); | |
630 | return r; | |
631 | } | |
632 | } | |
20263082 | 633 | |
9b221b63 | 634 | return 0; |
20263082 LP |
635 | } |
636 | ||
9bb69af4 | 637 | int session_stop(Session *s, bool force) { |
405e0255 LP |
638 | int r; |
639 | ||
640 | assert(s); | |
641 | ||
642 | if (!s->user) | |
643 | return -ESTALE; | |
644 | ||
5f41d1f1 LP |
645 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
646 | ||
10189fd6 DH |
647 | if (s->seat) |
648 | seat_evict_position(s->seat, s); | |
649 | ||
5f41d1f1 LP |
650 | /* We are going down, don't care about FIFOs anymore */ |
651 | session_remove_fifo(s); | |
652 | ||
405e0255 | 653 | /* Kill cgroup */ |
9bb69af4 | 654 | r = session_stop_scope(s, force); |
405e0255 | 655 | |
5f41d1f1 LP |
656 | s->stopping = true; |
657 | ||
952d3260 LP |
658 | user_elect_display(s->user); |
659 | ||
405e0255 | 660 | session_save(s); |
cc377381 | 661 | user_save(s->user); |
405e0255 LP |
662 | |
663 | return r; | |
664 | } | |
665 | ||
666 | int session_finalize(Session *s) { | |
118ecf32 | 667 | SessionDevice *sd; |
20263082 LP |
668 | |
669 | assert(s); | |
670 | ||
9444b1f2 LP |
671 | if (!s->user) |
672 | return -ESTALE; | |
673 | ||
ed18b08b | 674 | if (s->started) |
d9eb81f9 | 675 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 676 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_STOP), |
877d54e9 LP |
677 | "SESSION_ID=%s", s->id, |
678 | "USER_ID=%s", s->user->name, | |
de0671ee | 679 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 680 | LOG_MESSAGE("Removed session %s.", s->id), |
877d54e9 | 681 | NULL); |
98a28fef | 682 | |
5f41d1f1 LP |
683 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
684 | ||
10189fd6 DH |
685 | if (s->seat) |
686 | seat_evict_position(s->seat, s); | |
687 | ||
118ecf32 DH |
688 | /* Kill session devices */ |
689 | while ((sd = hashmap_first(s->devices))) | |
690 | session_device_free(sd); | |
691 | ||
491ac9f2 | 692 | (void) unlink(s->state_file); |
d2f92cdf | 693 | session_add_to_gc_queue(s); |
ed18b08b | 694 | user_add_to_gc_queue(s->user); |
14c3baca | 695 | |
405e0255 | 696 | if (s->started) { |
ed18b08b | 697 | session_send_signal(s, false); |
405e0255 LP |
698 | s->started = false; |
699 | } | |
50fb9793 | 700 | |
9418f147 LP |
701 | if (s->seat) { |
702 | if (s->seat->active == s) | |
703 | seat_set_active(s->seat, NULL); | |
704 | ||
23bd3b62 | 705 | seat_save(s->seat); |
5f41d1f1 | 706 | seat_send_changed(s->seat, "Sessions", NULL); |
9418f147 LP |
707 | } |
708 | ||
23bd3b62 | 709 | user_save(s->user); |
952d3260 | 710 | user_send_changed(s->user, "Sessions", "Display", NULL); |
9418f147 | 711 | |
491ac9f2 | 712 | return 0; |
20263082 LP |
713 | } |
714 | ||
5f41d1f1 LP |
715 | static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { |
716 | Session *s = userdata; | |
717 | ||
718 | assert(es); | |
719 | assert(s); | |
720 | ||
9bb69af4 | 721 | session_stop(s, false); |
5f41d1f1 LP |
722 | return 0; |
723 | } | |
724 | ||
ad8780c9 | 725 | int session_release(Session *s) { |
5f41d1f1 LP |
726 | assert(s); |
727 | ||
728 | if (!s->started || s->stopping) | |
ad8780c9 ZJS |
729 | return 0; |
730 | ||
731 | if (s->timer_event_source) | |
732 | return 0; | |
733 | ||
734 | return sd_event_add_time(s->manager->event, | |
735 | &s->timer_event_source, | |
736 | CLOCK_MONOTONIC, | |
737 | now(CLOCK_MONOTONIC) + RELEASE_USEC, 0, | |
738 | release_timeout_callback, s); | |
5f41d1f1 LP |
739 | } |
740 | ||
20263082 LP |
741 | bool session_is_active(Session *s) { |
742 | assert(s); | |
743 | ||
744 | if (!s->seat) | |
745 | return true; | |
746 | ||
747 | return s->seat->active == s; | |
748 | } | |
749 | ||
23406ce5 LP |
750 | static int get_tty_atime(const char *tty, usec_t *atime) { |
751 | _cleanup_free_ char *p = NULL; | |
a185c5aa | 752 | struct stat st; |
23406ce5 LP |
753 | |
754 | assert(tty); | |
755 | assert(atime); | |
756 | ||
757 | if (!path_is_absolute(tty)) { | |
758 | p = strappend("/dev/", tty); | |
759 | if (!p) | |
760 | return -ENOMEM; | |
761 | ||
762 | tty = p; | |
763 | } else if (!path_startswith(tty, "/dev/")) | |
764 | return -ENOENT; | |
765 | ||
766 | if (lstat(tty, &st) < 0) | |
767 | return -errno; | |
768 | ||
769 | *atime = timespec_load(&st.st_atim); | |
770 | return 0; | |
771 | } | |
772 | ||
773 | static int get_process_ctty_atime(pid_t pid, usec_t *atime) { | |
774 | _cleanup_free_ char *p = NULL; | |
775 | int r; | |
776 | ||
777 | assert(pid > 0); | |
778 | assert(atime); | |
779 | ||
780 | r = get_ctty(pid, NULL, &p); | |
781 | if (r < 0) | |
782 | return r; | |
783 | ||
784 | return get_tty_atime(p, atime); | |
785 | } | |
786 | ||
787 | int session_get_idle_hint(Session *s, dual_timestamp *t) { | |
23406ce5 LP |
788 | usec_t atime = 0, n; |
789 | int r; | |
a185c5aa LP |
790 | |
791 | assert(s); | |
792 | ||
23406ce5 | 793 | /* Explicit idle hint is set */ |
a185c5aa LP |
794 | if (s->idle_hint) { |
795 | if (t) | |
796 | *t = s->idle_hint_timestamp; | |
797 | ||
798 | return s->idle_hint; | |
799 | } | |
800 | ||
0762eaa3 | 801 | /* Graphical sessions should really implement a real |
23406ce5 LP |
802 | * idle hint logic */ |
803 | if (s->display) | |
a185c5aa LP |
804 | goto dont_know; |
805 | ||
23406ce5 LP |
806 | /* For sessions with an explicitly configured tty, let's check |
807 | * its atime */ | |
808 | if (s->tty) { | |
809 | r = get_tty_atime(s->tty, &atime); | |
810 | if (r >= 0) | |
811 | goto found_atime; | |
812 | } | |
a185c5aa | 813 | |
23406ce5 LP |
814 | /* For sessions with a leader but no explicitly configured |
815 | * tty, let's check the controlling tty of the leader */ | |
816 | if (s->leader > 0) { | |
817 | r = get_process_ctty_atime(s->leader, &atime); | |
818 | if (r >= 0) | |
819 | goto found_atime; | |
a185c5aa LP |
820 | } |
821 | ||
a185c5aa LP |
822 | dont_know: |
823 | if (t) | |
824 | *t = s->idle_hint_timestamp; | |
825 | ||
826 | return 0; | |
23406ce5 LP |
827 | |
828 | found_atime: | |
829 | if (t) | |
830 | dual_timestamp_from_realtime(t, atime); | |
831 | ||
832 | n = now(CLOCK_REALTIME); | |
833 | ||
834 | if (s->manager->idle_action_usec <= 0) | |
835 | return 0; | |
836 | ||
837 | return atime + s->manager->idle_action_usec <= n; | |
a185c5aa LP |
838 | } |
839 | ||
bef422ae LP |
840 | void session_set_idle_hint(Session *s, bool b) { |
841 | assert(s); | |
842 | ||
843 | if (s->idle_hint == b) | |
844 | return; | |
845 | ||
846 | s->idle_hint = b; | |
847 | dual_timestamp_get(&s->idle_hint_timestamp); | |
9418f147 | 848 | |
cc377381 | 849 | session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
9418f147 LP |
850 | |
851 | if (s->seat) | |
cc377381 LP |
852 | seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
853 | ||
854 | user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
855 | manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
856 | } | |
857 | ||
858 | static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { | |
859 | Session *s = userdata; | |
860 | ||
861 | assert(s); | |
862 | assert(s->fifo_fd == fd); | |
863 | ||
864 | /* EOF on the FIFO means the session died abnormally. */ | |
865 | ||
866 | session_remove_fifo(s); | |
9bb69af4 | 867 | session_stop(s, false); |
cc377381 LP |
868 | |
869 | return 1; | |
bef422ae LP |
870 | } |
871 | ||
932e3ee7 LP |
872 | int session_create_fifo(Session *s) { |
873 | int r; | |
874 | ||
31b79c2b LP |
875 | assert(s); |
876 | ||
b4f78aea | 877 | /* Create FIFO */ |
932e3ee7 | 878 | if (!s->fifo_path) { |
d2e54fae | 879 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
e6061ab2 LP |
880 | if (r < 0) |
881 | return r; | |
882 | ||
932e3ee7 LP |
883 | if (asprintf(&s->fifo_path, "/run/systemd/sessions/%s.ref", s->id) < 0) |
884 | return -ENOMEM; | |
31b79c2b | 885 | |
932e3ee7 LP |
886 | if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST) |
887 | return -errno; | |
888 | } | |
31b79c2b | 889 | |
932e3ee7 | 890 | /* Open reading side */ |
b4f78aea | 891 | if (s->fifo_fd < 0) { |
b4f78aea LP |
892 | s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY); |
893 | if (s->fifo_fd < 0) | |
894 | return -errno; | |
895 | ||
cc377381 LP |
896 | } |
897 | ||
898 | if (!s->fifo_event_source) { | |
151b9b96 | 899 | r = sd_event_add_io(s->manager->event, &s->fifo_event_source, s->fifo_fd, 0, session_dispatch_fifo, s); |
b4f78aea LP |
900 | if (r < 0) |
901 | return r; | |
902 | ||
718db961 | 903 | r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_IDLE); |
cc377381 LP |
904 | if (r < 0) |
905 | return r; | |
b4f78aea | 906 | } |
932e3ee7 LP |
907 | |
908 | /* Open writing side */ | |
909 | r = open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY); | |
910 | if (r < 0) | |
911 | return -errno; | |
31b79c2b | 912 | |
932e3ee7 LP |
913 | return r; |
914 | } | |
915 | ||
5f41d1f1 | 916 | static void session_remove_fifo(Session *s) { |
932e3ee7 LP |
917 | assert(s); |
918 | ||
03e334a1 LP |
919 | s->fifo_event_source = sd_event_source_unref(s->fifo_event_source); |
920 | s->fifo_fd = safe_close(s->fifo_fd); | |
932e3ee7 LP |
921 | |
922 | if (s->fifo_path) { | |
923 | unlink(s->fifo_path); | |
a1e58e8e | 924 | s->fifo_path = mfree(s->fifo_path); |
932e3ee7 | 925 | } |
31b79c2b LP |
926 | } |
927 | ||
cc377381 | 928 | bool session_check_gc(Session *s, bool drop_not_started) { |
20263082 LP |
929 | assert(s); |
930 | ||
4a4b033f | 931 | if (drop_not_started && !s->started) |
cc377381 | 932 | return false; |
932e3ee7 | 933 | |
9444b1f2 | 934 | if (!s->user) |
cc377381 | 935 | return false; |
9444b1f2 | 936 | |
932e3ee7 | 937 | if (s->fifo_fd >= 0) { |
5f41d1f1 | 938 | if (pipe_eof(s->fifo_fd) <= 0) |
cc377381 | 939 | return true; |
20263082 LP |
940 | } |
941 | ||
cc377381 LP |
942 | if (s->scope_job && manager_job_is_active(s->manager, s->scope_job)) |
943 | return true; | |
20263082 | 944 | |
cc377381 LP |
945 | if (s->scope && manager_unit_is_active(s->manager, s->scope)) |
946 | return true; | |
20263082 | 947 | |
cc377381 | 948 | return false; |
20263082 LP |
949 | } |
950 | ||
14c3baca LP |
951 | void session_add_to_gc_queue(Session *s) { |
952 | assert(s); | |
953 | ||
954 | if (s->in_gc_queue) | |
955 | return; | |
956 | ||
71fda00f | 957 | LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s); |
14c3baca LP |
958 | s->in_gc_queue = true; |
959 | } | |
960 | ||
0604381b LP |
961 | SessionState session_get_state(Session *s) { |
962 | assert(s); | |
963 | ||
8fe63cd4 | 964 | /* always check closing first */ |
5f41d1f1 LP |
965 | if (s->stopping || s->timer_event_source) |
966 | return SESSION_CLOSING; | |
967 | ||
8fe63cd4 | 968 | if (s->scope_job || s->fifo_fd < 0) |
405e0255 | 969 | return SESSION_OPENING; |
fb6becb4 | 970 | |
0604381b LP |
971 | if (session_is_active(s)) |
972 | return SESSION_ACTIVE; | |
973 | ||
974 | return SESSION_ONLINE; | |
975 | } | |
976 | ||
de07ab16 | 977 | int session_kill(Session *s, KillWho who, int signo) { |
de07ab16 LP |
978 | assert(s); |
979 | ||
fb6becb4 | 980 | if (!s->scope) |
de07ab16 LP |
981 | return -ESRCH; |
982 | ||
fb6becb4 | 983 | return manager_kill_unit(s->manager, s->scope, who, signo, NULL); |
de07ab16 LP |
984 | } |
985 | ||
90a18413 | 986 | static int session_open_vt(Session *s) { |
5f41d1f1 | 987 | char path[sizeof("/dev/tty") + DECIMAL_STR_MAX(s->vtnr)]; |
90a18413 | 988 | |
baccf3e4 OB |
989 | if (s->vtnr < 1) |
990 | return -ENODEV; | |
90a18413 DH |
991 | |
992 | if (s->vtfd >= 0) | |
993 | return s->vtfd; | |
994 | ||
92bd5ff3 | 995 | sprintf(path, "/dev/tty%u", s->vtnr); |
22356953 | 996 | s->vtfd = open_terminal(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY); |
4a62c710 MS |
997 | if (s->vtfd < 0) |
998 | return log_error_errno(errno, "cannot open VT %s of session %s: %m", path, s->id); | |
90a18413 DH |
999 | |
1000 | return s->vtfd; | |
1001 | } | |
1002 | ||
baccf3e4 | 1003 | int session_prepare_vt(Session *s) { |
90a18413 DH |
1004 | int vt, r; |
1005 | struct vt_mode mode = { 0 }; | |
90a18413 | 1006 | |
baccf3e4 OB |
1007 | if (s->vtnr < 1) |
1008 | return 0; | |
1009 | ||
90a18413 DH |
1010 | vt = session_open_vt(s); |
1011 | if (vt < 0) | |
baccf3e4 | 1012 | return vt; |
90a18413 | 1013 | |
d6176c6c | 1014 | r = fchown(vt, s->user->uid, -1); |
baccf3e4 | 1015 | if (r < 0) { |
94c156cd LP |
1016 | r = log_error_errno(errno, |
1017 | "Cannot change owner of /dev/tty%u: %m", | |
1018 | s->vtnr); | |
d6176c6c | 1019 | goto error; |
baccf3e4 | 1020 | } |
d6176c6c | 1021 | |
90a18413 | 1022 | r = ioctl(vt, KDSKBMODE, K_OFF); |
baccf3e4 | 1023 | if (r < 0) { |
94c156cd LP |
1024 | r = log_error_errno(errno, |
1025 | "Cannot set K_OFF on /dev/tty%u: %m", | |
1026 | s->vtnr); | |
90a18413 | 1027 | goto error; |
baccf3e4 | 1028 | } |
90a18413 DH |
1029 | |
1030 | r = ioctl(vt, KDSETMODE, KD_GRAPHICS); | |
baccf3e4 | 1031 | if (r < 0) { |
94c156cd LP |
1032 | r = log_error_errno(errno, |
1033 | "Cannot set KD_GRAPHICS on /dev/tty%u: %m", | |
1034 | s->vtnr); | |
90a18413 | 1035 | goto error; |
baccf3e4 | 1036 | } |
90a18413 | 1037 | |
90a18413 DH |
1038 | /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS. |
1039 | * So we need a dummy handler here which just acknowledges *all* VT | |
1040 | * switch requests. */ | |
1041 | mode.mode = VT_PROCESS; | |
92683ad2 DH |
1042 | mode.relsig = SIGRTMIN; |
1043 | mode.acqsig = SIGRTMIN + 1; | |
90a18413 | 1044 | r = ioctl(vt, VT_SETMODE, &mode); |
baccf3e4 | 1045 | if (r < 0) { |
94c156cd LP |
1046 | r = log_error_errno(errno, |
1047 | "Cannot set VT_PROCESS on /dev/tty%u: %m", | |
1048 | s->vtnr); | |
90a18413 | 1049 | goto error; |
baccf3e4 | 1050 | } |
90a18413 | 1051 | |
baccf3e4 | 1052 | return 0; |
90a18413 DH |
1053 | |
1054 | error: | |
90a18413 | 1055 | session_restore_vt(s); |
baccf3e4 | 1056 | return r; |
90a18413 DH |
1057 | } |
1058 | ||
1059 | void session_restore_vt(Session *s) { | |
16597ac3 LP |
1060 | |
1061 | static const struct vt_mode mode = { | |
1062 | .mode = VT_AUTO, | |
1063 | }; | |
1064 | ||
a0eb2a75 | 1065 | _cleanup_free_ char *utf8 = NULL; |
16597ac3 | 1066 | int vt, kb, old_fd; |
90a18413 | 1067 | |
128df4cf OT |
1068 | /* We need to get a fresh handle to the virtual terminal, |
1069 | * since the old file-descriptor is potentially in a hung-up | |
1070 | * state after the controlling process exited; we do a | |
1071 | * little dance to avoid having the terminal be available | |
1072 | * for reuse before we've cleaned it up. | |
1073 | */ | |
16597ac3 | 1074 | old_fd = s->vtfd; |
128df4cf OT |
1075 | s->vtfd = -1; |
1076 | ||
90a18413 | 1077 | vt = session_open_vt(s); |
128df4cf OT |
1078 | safe_close(old_fd); |
1079 | ||
90a18413 DH |
1080 | if (vt < 0) |
1081 | return; | |
1082 | ||
2bf10523 | 1083 | (void) ioctl(vt, KDSETMODE, KD_TEXT); |
90a18413 DH |
1084 | |
1085 | if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8) >= 0 && *utf8 == '1') | |
1086 | kb = K_UNICODE; | |
16597ac3 LP |
1087 | else |
1088 | kb = K_XLATE; | |
03e334a1 | 1089 | |
2bf10523 | 1090 | (void) ioctl(vt, KDSKBMODE, kb); |
90a18413 | 1091 | |
2bf10523 | 1092 | (void) ioctl(vt, VT_SETMODE, &mode); |
16597ac3 | 1093 | (void) fchown(vt, 0, (gid_t) -1); |
d6176c6c | 1094 | |
03e334a1 | 1095 | s->vtfd = safe_close(s->vtfd); |
90a18413 DH |
1096 | } |
1097 | ||
2ec3ff66 | 1098 | void session_leave_vt(Session *s) { |
ce540a24 DH |
1099 | int r; |
1100 | ||
2ec3ff66 DH |
1101 | assert(s); |
1102 | ||
1103 | /* This is called whenever we get a VT-switch signal from the kernel. | |
1104 | * We acknowledge all of them unconditionally. Note that session are | |
1105 | * free to overwrite those handlers and we only register them for | |
1106 | * sessions with controllers. Legacy sessions are not affected. | |
1107 | * However, if we switch from a non-legacy to a legacy session, we must | |
1108 | * make sure to pause all device before acknowledging the switch. We | |
1109 | * process the real switch only after we are notified via sysfs, so the | |
1110 | * legacy session might have already started using the devices. If we | |
1111 | * don't pause the devices before the switch, we might confuse the | |
1112 | * session we switch to. */ | |
1113 | ||
1114 | if (s->vtfd < 0) | |
1115 | return; | |
1116 | ||
1117 | session_device_pause_all(s); | |
ce540a24 DH |
1118 | r = ioctl(s->vtfd, VT_RELDISP, 1); |
1119 | if (r < 0) | |
56f64d95 | 1120 | log_debug_errno(errno, "Cannot release VT of session %s: %m", s->id); |
2ec3ff66 DH |
1121 | } |
1122 | ||
cc377381 | 1123 | bool session_is_controller(Session *s, const char *sender) { |
ae5e06bd DH |
1124 | assert(s); |
1125 | ||
1126 | return streq_ptr(s->controller, sender); | |
1127 | } | |
1128 | ||
b12e5615 DH |
1129 | static void session_release_controller(Session *s, bool notify) { |
1130 | _cleanup_free_ char *name = NULL; | |
6d33772f DH |
1131 | SessionDevice *sd; |
1132 | ||
b12e5615 DH |
1133 | if (!s->controller) |
1134 | return; | |
6d33772f | 1135 | |
b12e5615 | 1136 | name = s->controller; |
90a18413 | 1137 | |
b12e5615 DH |
1138 | /* By resetting the controller before releasing the devices, we won't |
1139 | * send notification signals. This avoids sending useless notifications | |
1140 | * if the controller is released on disconnects. */ | |
1141 | if (!notify) | |
1142 | s->controller = NULL; | |
6d33772f | 1143 | |
b12e5615 DH |
1144 | while ((sd = hashmap_first(s->devices))) |
1145 | session_device_free(sd); | |
1146 | ||
1147 | s->controller = NULL; | |
3cde9e8f DM |
1148 | s->track = sd_bus_track_unref(s->track); |
1149 | } | |
1150 | ||
1151 | static int on_bus_track(sd_bus_track *track, void *userdata) { | |
1152 | Session *s = userdata; | |
1153 | ||
1154 | assert(track); | |
1155 | assert(s); | |
1156 | ||
1157 | session_drop_controller(s); | |
1158 | ||
1159 | return 0; | |
6d33772f DH |
1160 | } |
1161 | ||
ae5e06bd | 1162 | int session_set_controller(Session *s, const char *sender, bool force) { |
b12e5615 | 1163 | _cleanup_free_ char *name = NULL; |
ae5e06bd DH |
1164 | int r; |
1165 | ||
1166 | assert(s); | |
1167 | assert(sender); | |
1168 | ||
1169 | if (session_is_controller(s, sender)) | |
1170 | return 0; | |
1171 | if (s->controller && !force) | |
1172 | return -EBUSY; | |
1173 | ||
b12e5615 DH |
1174 | name = strdup(sender); |
1175 | if (!name) | |
ae5e06bd DH |
1176 | return -ENOMEM; |
1177 | ||
3cde9e8f DM |
1178 | s->track = sd_bus_track_unref(s->track); |
1179 | r = sd_bus_track_new(s->manager->bus, &s->track, on_bus_track, s); | |
1180 | if (r < 0) | |
1181 | return r; | |
1182 | ||
1183 | r = sd_bus_track_add_name(s->track, name); | |
1184 | if (r < 0) | |
ae5e06bd | 1185 | return r; |
ae5e06bd | 1186 | |
90a18413 DH |
1187 | /* When setting a session controller, we forcibly mute the VT and set |
1188 | * it into graphics-mode. Applications can override that by changing | |
1189 | * VT state after calling TakeControl(). However, this serves as a good | |
1190 | * default and well-behaving controllers can now ignore VTs entirely. | |
1191 | * Note that we reset the VT on ReleaseControl() and if the controller | |
1192 | * exits. | |
1193 | * If logind crashes/restarts, we restore the controller during restart | |
1194 | * or reset the VT in case it crashed/exited, too. */ | |
baccf3e4 | 1195 | r = session_prepare_vt(s); |
13f493dc | 1196 | if (r < 0) { |
3cde9e8f | 1197 | s->track = sd_bus_track_unref(s->track); |
baccf3e4 | 1198 | return r; |
13f493dc | 1199 | } |
baccf3e4 | 1200 | |
b12e5615 DH |
1201 | session_release_controller(s, true); |
1202 | s->controller = name; | |
1203 | name = NULL; | |
1204 | session_save(s); | |
90a18413 | 1205 | |
ae5e06bd DH |
1206 | return 0; |
1207 | } | |
1208 | ||
1209 | void session_drop_controller(Session *s) { | |
1210 | assert(s); | |
1211 | ||
1212 | if (!s->controller) | |
1213 | return; | |
1214 | ||
3cde9e8f | 1215 | s->track = sd_bus_track_unref(s->track); |
b12e5615 DH |
1216 | session_release_controller(s, false); |
1217 | session_save(s); | |
1218 | session_restore_vt(s); | |
ae5e06bd DH |
1219 | } |
1220 | ||
fb6becb4 LP |
1221 | static const char* const session_state_table[_SESSION_STATE_MAX] = { |
1222 | [SESSION_OPENING] = "opening", | |
0604381b LP |
1223 | [SESSION_ONLINE] = "online", |
1224 | [SESSION_ACTIVE] = "active", | |
1225 | [SESSION_CLOSING] = "closing" | |
1226 | }; | |
1227 | ||
1228 | DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState); | |
1229 | ||
20263082 | 1230 | static const char* const session_type_table[_SESSION_TYPE_MAX] = { |
2c5859af | 1231 | [SESSION_UNSPECIFIED] = "unspecified", |
3f49d45a | 1232 | [SESSION_TTY] = "tty", |
98a28fef | 1233 | [SESSION_X11] = "x11", |
d9eb81f9 | 1234 | [SESSION_WAYLAND] = "wayland", |
9541666b | 1235 | [SESSION_MIR] = "mir", |
e9e74f28 | 1236 | [SESSION_WEB] = "web", |
20263082 LP |
1237 | }; |
1238 | ||
1239 | DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType); | |
de07ab16 | 1240 | |
55efac6c LP |
1241 | static const char* const session_class_table[_SESSION_CLASS_MAX] = { |
1242 | [SESSION_USER] = "user", | |
1243 | [SESSION_GREETER] = "greeter", | |
e2acb67b LP |
1244 | [SESSION_LOCK_SCREEN] = "lock-screen", |
1245 | [SESSION_BACKGROUND] = "background" | |
55efac6c LP |
1246 | }; |
1247 | ||
1248 | DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass); | |
1249 | ||
de07ab16 LP |
1250 | static const char* const kill_who_table[_KILL_WHO_MAX] = { |
1251 | [KILL_LEADER] = "leader", | |
1252 | [KILL_ALL] = "all" | |
1253 | }; | |
1254 | ||
1255 | DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); |