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Commit | Line | Data |
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20263082 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2011 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
20263082 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
20263082 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
20263082 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
20 | #include <errno.h> | |
90a18413 | 21 | #include <fcntl.h> |
90a18413 | 22 | #include <linux/kd.h> |
4f5dd394 | 23 | #include <linux/vt.h> |
90a18413 | 24 | #include <signal.h> |
20263082 | 25 | #include <string.h> |
90a18413 | 26 | #include <sys/ioctl.h> |
20263082 LP |
27 | #include <unistd.h> |
28 | ||
cc377381 | 29 | #include "sd-messages.h" |
4f5dd394 | 30 | |
b5efdb8a | 31 | #include "alloc-util.h" |
430f0182 | 32 | #include "audit-util.h" |
cc377381 | 33 | #include "bus-error.h" |
4f5dd394 LP |
34 | #include "bus-util.h" |
35 | #include "escape.h" | |
3ffd4af2 | 36 | #include "fd-util.h" |
4f5dd394 | 37 | #include "fileio.h" |
f97b34a6 | 38 | #include "format-util.h" |
c004493c | 39 | #include "io-util.h" |
3ffd4af2 | 40 | #include "logind-session.h" |
4f5dd394 | 41 | #include "mkdir.h" |
6bedfcbb | 42 | #include "parse-util.h" |
4f5dd394 | 43 | #include "path-util.h" |
8b43440b | 44 | #include "string-table.h" |
288a74cc | 45 | #include "terminal-util.h" |
b1d4f8e1 | 46 | #include "user-util.h" |
4f5dd394 | 47 | #include "util.h" |
20263082 | 48 | |
5f41d1f1 LP |
49 | #define RELEASE_USEC (20*USEC_PER_SEC) |
50 | ||
51 | static void session_remove_fifo(Session *s); | |
52 | ||
9444b1f2 | 53 | Session* session_new(Manager *m, const char *id) { |
20263082 LP |
54 | Session *s; |
55 | ||
56 | assert(m); | |
57 | assert(id); | |
4b549144 | 58 | assert(session_id_valid(id)); |
20263082 | 59 | |
14c3baca | 60 | s = new0(Session, 1); |
20263082 LP |
61 | if (!s) |
62 | return NULL; | |
63 | ||
98a28fef | 64 | s->state_file = strappend("/run/systemd/sessions/", id); |
6b430fdb ZJS |
65 | if (!s->state_file) |
66 | return mfree(s); | |
20263082 | 67 | |
d5099efc | 68 | s->devices = hashmap_new(&devt_hash_ops); |
118ecf32 DH |
69 | if (!s->devices) { |
70 | free(s->state_file); | |
6b430fdb | 71 | return mfree(s); |
118ecf32 DH |
72 | } |
73 | ||
2b6bf07d | 74 | s->id = basename(s->state_file); |
20263082 LP |
75 | |
76 | if (hashmap_put(m->sessions, s->id, s) < 0) { | |
118ecf32 | 77 | hashmap_free(s->devices); |
f8e2fb7b | 78 | free(s->state_file); |
6b430fdb | 79 | return mfree(s); |
20263082 LP |
80 | } |
81 | ||
82 | s->manager = m; | |
932e3ee7 | 83 | s->fifo_fd = -1; |
90a18413 | 84 | s->vtfd = -1; |
20263082 LP |
85 | |
86 | return s; | |
87 | } | |
88 | ||
89 | void session_free(Session *s) { | |
118ecf32 DH |
90 | SessionDevice *sd; |
91 | ||
20263082 LP |
92 | assert(s); |
93 | ||
14c3baca | 94 | if (s->in_gc_queue) |
71fda00f | 95 | LIST_REMOVE(gc_queue, s->manager->session_gc_queue, s); |
14c3baca | 96 | |
5f41d1f1 LP |
97 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
98 | ||
cc377381 LP |
99 | session_remove_fifo(s); |
100 | ||
ae5e06bd DH |
101 | session_drop_controller(s); |
102 | ||
118ecf32 DH |
103 | while ((sd = hashmap_first(s->devices))) |
104 | session_device_free(sd); | |
105 | ||
106 | hashmap_free(s->devices); | |
107 | ||
20263082 | 108 | if (s->user) { |
71fda00f | 109 | LIST_REMOVE(sessions_by_user, s->user->sessions, s); |
20263082 LP |
110 | |
111 | if (s->user->display == s) | |
112 | s->user->display = NULL; | |
113 | } | |
114 | ||
9418f147 LP |
115 | if (s->seat) { |
116 | if (s->seat->active == s) | |
117 | s->seat->active = NULL; | |
d7bd01b5 DH |
118 | if (s->seat->pending_switch == s) |
119 | s->seat->pending_switch = NULL; | |
9418f147 | 120 | |
49e6fdbf | 121 | seat_evict_position(s->seat, s); |
71fda00f | 122 | LIST_REMOVE(sessions_by_seat, s->seat->sessions, s); |
9418f147 | 123 | } |
20263082 | 124 | |
fb6becb4 LP |
125 | if (s->scope) { |
126 | hashmap_remove(s->manager->session_units, s->scope); | |
127 | free(s->scope); | |
128 | } | |
129 | ||
130 | free(s->scope_job); | |
1713813d | 131 | |
cc377381 | 132 | sd_bus_message_unref(s->create_message); |
20263082 LP |
133 | |
134 | free(s->tty); | |
135 | free(s->display); | |
136 | free(s->remote_host); | |
3f49d45a | 137 | free(s->remote_user); |
98a28fef | 138 | free(s->service); |
a4cd87e9 | 139 | free(s->desktop); |
20263082 LP |
140 | |
141 | hashmap_remove(s->manager->sessions, s->id); | |
98a28fef | 142 | |
d2f92cdf | 143 | free(s->state_file); |
20263082 LP |
144 | free(s); |
145 | } | |
146 | ||
9444b1f2 LP |
147 | void session_set_user(Session *s, User *u) { |
148 | assert(s); | |
149 | assert(!s->user); | |
150 | ||
151 | s->user = u; | |
71fda00f | 152 | LIST_PREPEND(sessions_by_user, u->sessions, s); |
9444b1f2 LP |
153 | } |
154 | ||
20263082 | 155 | int session_save(Session *s) { |
507f22bd | 156 | _cleanup_free_ char *temp_path = NULL; |
cc377381 | 157 | _cleanup_fclose_ FILE *f = NULL; |
20263082 LP |
158 | int r = 0; |
159 | ||
160 | assert(s); | |
161 | ||
9444b1f2 LP |
162 | if (!s->user) |
163 | return -ESTALE; | |
164 | ||
accaeded LP |
165 | if (!s->started) |
166 | return 0; | |
167 | ||
d2e54fae | 168 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
20263082 | 169 | if (r < 0) |
dacd6cee | 170 | goto fail; |
20263082 | 171 | |
14c3baca LP |
172 | r = fopen_temporary(s->state_file, &f, &temp_path); |
173 | if (r < 0) | |
dacd6cee | 174 | goto fail; |
20263082 LP |
175 | |
176 | assert(s->user); | |
177 | ||
14c3baca LP |
178 | fchmod(fileno(f), 0644); |
179 | ||
20263082 LP |
180 | fprintf(f, |
181 | "# This is private data. Do not parse.\n" | |
90b2de37 | 182 | "UID="UID_FMT"\n" |
20263082 LP |
183 | "USER=%s\n" |
184 | "ACTIVE=%i\n" | |
0604381b | 185 | "STATE=%s\n" |
fb6becb4 | 186 | "REMOTE=%i\n", |
90b2de37 | 187 | s->user->uid, |
20263082 LP |
188 | s->user->name, |
189 | session_is_active(s), | |
0604381b | 190 | session_state_to_string(session_get_state(s)), |
fb6becb4 | 191 | s->remote); |
20263082 | 192 | |
a91e4e53 | 193 | if (s->type >= 0) |
507f22bd | 194 | fprintf(f, "TYPE=%s\n", session_type_to_string(s->type)); |
a91e4e53 | 195 | |
55efac6c | 196 | if (s->class >= 0) |
507f22bd | 197 | fprintf(f, "CLASS=%s\n", session_class_to_string(s->class)); |
55efac6c | 198 | |
fb6becb4 LP |
199 | if (s->scope) |
200 | fprintf(f, "SCOPE=%s\n", s->scope); | |
fb6becb4 LP |
201 | if (s->scope_job) |
202 | fprintf(f, "SCOPE_JOB=%s\n", s->scope_job); | |
20263082 | 203 | |
932e3ee7 | 204 | if (s->fifo_path) |
507f22bd | 205 | fprintf(f, "FIFO=%s\n", s->fifo_path); |
932e3ee7 | 206 | |
20263082 | 207 | if (s->seat) |
507f22bd | 208 | fprintf(f, "SEAT=%s\n", s->seat->id); |
20263082 LP |
209 | |
210 | if (s->tty) | |
507f22bd | 211 | fprintf(f, "TTY=%s\n", s->tty); |
20263082 LP |
212 | |
213 | if (s->display) | |
507f22bd | 214 | fprintf(f, "DISPLAY=%s\n", s->display); |
20263082 | 215 | |
558c6490 LP |
216 | if (s->remote_host) { |
217 | _cleanup_free_ char *escaped; | |
218 | ||
219 | escaped = cescape(s->remote_host); | |
220 | if (!escaped) { | |
221 | r = -ENOMEM; | |
dacd6cee | 222 | goto fail; |
558c6490 LP |
223 | } |
224 | ||
225 | fprintf(f, "REMOTE_HOST=%s\n", escaped); | |
226 | } | |
227 | ||
228 | if (s->remote_user) { | |
229 | _cleanup_free_ char *escaped; | |
230 | ||
231 | escaped = cescape(s->remote_user); | |
232 | if (!escaped) { | |
233 | r = -ENOMEM; | |
dacd6cee | 234 | goto fail; |
558c6490 LP |
235 | } |
236 | ||
237 | fprintf(f, "REMOTE_USER=%s\n", escaped); | |
238 | } | |
239 | ||
240 | if (s->service) { | |
241 | _cleanup_free_ char *escaped; | |
20263082 | 242 | |
558c6490 LP |
243 | escaped = cescape(s->service); |
244 | if (!escaped) { | |
245 | r = -ENOMEM; | |
dacd6cee | 246 | goto fail; |
558c6490 LP |
247 | } |
248 | ||
249 | fprintf(f, "SERVICE=%s\n", escaped); | |
250 | } | |
3f49d45a | 251 | |
558c6490 LP |
252 | if (s->desktop) { |
253 | _cleanup_free_ char *escaped; | |
98a28fef | 254 | |
558c6490 LP |
255 | |
256 | escaped = cescape(s->desktop); | |
257 | if (!escaped) { | |
258 | r = -ENOMEM; | |
dacd6cee | 259 | goto fail; |
558c6490 LP |
260 | } |
261 | ||
262 | fprintf(f, "DESKTOP=%s\n", escaped); | |
263 | } | |
a4cd87e9 | 264 | |
bf7825ae | 265 | if (s->seat && seat_has_vts(s->seat)) |
92bd5ff3 | 266 | fprintf(f, "VTNR=%u\n", s->vtnr); |
20263082 | 267 | |
49e6fdbf | 268 | if (!s->vtnr) |
e6494a07 | 269 | fprintf(f, "POSITION=%u\n", s->position); |
49e6fdbf | 270 | |
20263082 | 271 | if (s->leader > 0) |
90b2de37 | 272 | fprintf(f, "LEADER="PID_FMT"\n", s->leader); |
20263082 LP |
273 | |
274 | if (s->audit_id > 0) | |
507f22bd | 275 | fprintf(f, "AUDIT=%"PRIu32"\n", s->audit_id); |
20263082 | 276 | |
9444b1f2 LP |
277 | if (dual_timestamp_is_set(&s->timestamp)) |
278 | fprintf(f, | |
90b2de37 ZJS |
279 | "REALTIME="USEC_FMT"\n" |
280 | "MONOTONIC="USEC_FMT"\n", | |
281 | s->timestamp.realtime, | |
282 | s->timestamp.monotonic); | |
9444b1f2 | 283 | |
6d33772f DH |
284 | if (s->controller) |
285 | fprintf(f, "CONTROLLER=%s\n", s->controller); | |
286 | ||
dacd6cee LP |
287 | r = fflush_and_check(f); |
288 | if (r < 0) | |
289 | goto fail; | |
14c3baca | 290 | |
dacd6cee | 291 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 292 | r = -errno; |
dacd6cee | 293 | goto fail; |
20263082 LP |
294 | } |
295 | ||
dacd6cee LP |
296 | return 0; |
297 | ||
298 | fail: | |
299 | (void) unlink(s->state_file); | |
14c3baca | 300 | |
dacd6cee LP |
301 | if (temp_path) |
302 | (void) unlink(temp_path); | |
303 | ||
304 | return log_error_errno(r, "Failed to save session data %s: %m", s->state_file); | |
20263082 LP |
305 | } |
306 | ||
dacd6cee | 307 | |
20263082 | 308 | int session_load(Session *s) { |
9444b1f2 | 309 | _cleanup_free_ char *remote = NULL, |
a185c5aa LP |
310 | *seat = NULL, |
311 | *vtnr = NULL, | |
be94d954 | 312 | *state = NULL, |
e6494a07 | 313 | *position = NULL, |
a185c5aa | 314 | *leader = NULL, |
55efac6c | 315 | *type = NULL, |
9444b1f2 LP |
316 | *class = NULL, |
317 | *uid = NULL, | |
318 | *realtime = NULL, | |
6d33772f DH |
319 | *monotonic = NULL, |
320 | *controller = NULL; | |
a185c5aa LP |
321 | |
322 | int k, r; | |
323 | ||
20263082 LP |
324 | assert(s); |
325 | ||
a185c5aa LP |
326 | r = parse_env_file(s->state_file, NEWLINE, |
327 | "REMOTE", &remote, | |
fb6becb4 LP |
328 | "SCOPE", &s->scope, |
329 | "SCOPE_JOB", &s->scope_job, | |
932e3ee7 | 330 | "FIFO", &s->fifo_path, |
a185c5aa LP |
331 | "SEAT", &seat, |
332 | "TTY", &s->tty, | |
333 | "DISPLAY", &s->display, | |
334 | "REMOTE_HOST", &s->remote_host, | |
335 | "REMOTE_USER", &s->remote_user, | |
98a28fef | 336 | "SERVICE", &s->service, |
a4cd87e9 | 337 | "DESKTOP", &s->desktop, |
a185c5aa | 338 | "VTNR", &vtnr, |
be94d954 | 339 | "STATE", &state, |
e6494a07 | 340 | "POSITION", &position, |
a185c5aa | 341 | "LEADER", &leader, |
a91e4e53 | 342 | "TYPE", &type, |
55efac6c | 343 | "CLASS", &class, |
9444b1f2 LP |
344 | "UID", &uid, |
345 | "REALTIME", &realtime, | |
346 | "MONOTONIC", &monotonic, | |
6d33772f | 347 | "CONTROLLER", &controller, |
a185c5aa LP |
348 | NULL); |
349 | ||
f647962d MS |
350 | if (r < 0) |
351 | return log_error_errno(r, "Failed to read %s: %m", s->state_file); | |
9444b1f2 LP |
352 | |
353 | if (!s->user) { | |
354 | uid_t u; | |
355 | User *user; | |
356 | ||
357 | if (!uid) { | |
358 | log_error("UID not specified for session %s", s->id); | |
359 | return -ENOENT; | |
360 | } | |
361 | ||
362 | r = parse_uid(uid, &u); | |
363 | if (r < 0) { | |
364 | log_error("Failed to parse UID value %s for session %s.", uid, s->id); | |
365 | return r; | |
366 | } | |
367 | ||
8cb4ab00 | 368 | user = hashmap_get(s->manager->users, UID_TO_PTR(u)); |
9444b1f2 LP |
369 | if (!user) { |
370 | log_error("User of session %s not known.", s->id); | |
371 | return -ENOENT; | |
372 | } | |
373 | ||
374 | session_set_user(s, user); | |
375 | } | |
a185c5aa LP |
376 | |
377 | if (remote) { | |
378 | k = parse_boolean(remote); | |
379 | if (k >= 0) | |
380 | s->remote = k; | |
381 | } | |
382 | ||
c506027a DH |
383 | if (vtnr) |
384 | safe_atou(vtnr, &s->vtnr); | |
385 | ||
9418f147 | 386 | if (seat && !s->seat) { |
a185c5aa LP |
387 | Seat *o; |
388 | ||
389 | o = hashmap_get(s->manager->seats, seat); | |
390 | if (o) | |
c506027a DH |
391 | r = seat_attach_session(o, s); |
392 | if (!o || r < 0) | |
393 | log_error("Cannot attach session %s to seat %s", s->id, seat); | |
a185c5aa LP |
394 | } |
395 | ||
c506027a DH |
396 | if (!s->seat || !seat_has_vts(s->seat)) |
397 | s->vtnr = 0; | |
a185c5aa | 398 | |
e6494a07 | 399 | if (position && s->seat) { |
49e6fdbf DH |
400 | unsigned int npos; |
401 | ||
e6494a07 | 402 | safe_atou(position, &npos); |
49e6fdbf DH |
403 | seat_claim_position(s->seat, s, npos); |
404 | } | |
405 | ||
a185c5aa | 406 | if (leader) { |
f8e2fb7b LP |
407 | k = parse_pid(leader, &s->leader); |
408 | if (k >= 0) | |
409 | audit_session_from_pid(s->leader, &s->audit_id); | |
a185c5aa LP |
410 | } |
411 | ||
a91e4e53 LP |
412 | if (type) { |
413 | SessionType t; | |
414 | ||
415 | t = session_type_from_string(type); | |
416 | if (t >= 0) | |
417 | s->type = t; | |
418 | } | |
419 | ||
55efac6c LP |
420 | if (class) { |
421 | SessionClass c; | |
422 | ||
423 | c = session_class_from_string(class); | |
424 | if (c >= 0) | |
425 | s->class = c; | |
426 | } | |
427 | ||
be94d954 MP |
428 | if (state && streq(state, "closing")) |
429 | s->stopping = true; | |
430 | ||
b4f78aea LP |
431 | if (s->fifo_path) { |
432 | int fd; | |
433 | ||
434 | /* If we open an unopened pipe for reading we will not | |
435 | get an EOF. to trigger an EOF we hence open it for | |
be94d954 MP |
436 | writing, but close it right away which then will |
437 | trigger the EOF. This will happen immediately if no | |
438 | other process has the FIFO open for writing, i. e. | |
439 | when the session died before logind (re)started. */ | |
b4f78aea LP |
440 | |
441 | fd = session_create_fifo(s); | |
03e334a1 | 442 | safe_close(fd); |
b4f78aea LP |
443 | } |
444 | ||
b895a735 BR |
445 | if (realtime) |
446 | timestamp_deserialize(realtime, &s->timestamp.realtime); | |
447 | if (monotonic) | |
448 | timestamp_deserialize(monotonic, &s->timestamp.monotonic); | |
a185c5aa | 449 | |
6d33772f DH |
450 | if (controller) { |
451 | if (bus_name_has_owner(s->manager->bus, controller, NULL) > 0) | |
452 | session_set_controller(s, controller, false); | |
90a18413 DH |
453 | else |
454 | session_restore_vt(s); | |
6d33772f DH |
455 | } |
456 | ||
a185c5aa | 457 | return r; |
20263082 LP |
458 | } |
459 | ||
460 | int session_activate(Session *s) { | |
d7bd01b5 DH |
461 | unsigned int num_pending; |
462 | ||
20263082 | 463 | assert(s); |
9444b1f2 | 464 | assert(s->user); |
20263082 | 465 | |
20263082 | 466 | if (!s->seat) |
15411c0c | 467 | return -EOPNOTSUPP; |
20263082 LP |
468 | |
469 | if (s->seat->active == s) | |
470 | return 0; | |
471 | ||
d7bd01b5 DH |
472 | /* on seats with VTs, we let VTs manage session-switching */ |
473 | if (seat_has_vts(s->seat)) { | |
92bd5ff3 | 474 | if (!s->vtnr) |
15411c0c | 475 | return -EOPNOTSUPP; |
d7bd01b5 DH |
476 | |
477 | return chvt(s->vtnr); | |
478 | } | |
479 | ||
480 | /* On seats without VTs, we implement session-switching in logind. We | |
481 | * try to pause all session-devices and wait until the session | |
482 | * controller acknowledged them. Once all devices are asleep, we simply | |
483 | * switch the active session and be done. | |
484 | * We save the session we want to switch to in seat->pending_switch and | |
485 | * seat_complete_switch() will perform the final switch. */ | |
486 | ||
487 | s->seat->pending_switch = s; | |
488 | ||
489 | /* if no devices are running, immediately perform the session switch */ | |
490 | num_pending = session_device_try_pause_all(s); | |
491 | if (!num_pending) | |
492 | seat_complete_switch(s->seat); | |
20263082 | 493 | |
d7bd01b5 | 494 | return 0; |
20263082 LP |
495 | } |
496 | ||
fb6becb4 | 497 | static int session_start_scope(Session *s) { |
98a28fef LP |
498 | int r; |
499 | ||
500 | assert(s); | |
9444b1f2 | 501 | assert(s->user); |
98a28fef | 502 | |
fb6becb4 | 503 | if (!s->scope) { |
4afd3348 | 504 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
39883f62 | 505 | char *scope, *job = NULL; |
90558f31 | 506 | const char *description; |
405e0255 | 507 | |
605405c6 | 508 | scope = strjoin("session-", s->id, ".scope"); |
d0af76e6 | 509 | if (!scope) |
ae018d9b LP |
510 | return log_oom(); |
511 | ||
81d62103 | 512 | description = strjoina("Session ", s->id, " of user ", s->user->name); |
90558f31 LP |
513 | |
514 | r = manager_start_scope( | |
515 | s->manager, | |
516 | scope, | |
517 | s->leader, | |
518 | s->user->slice, | |
519 | description, | |
520 | "systemd-logind.service", | |
521 | "systemd-user-sessions.service", | |
522 | (uint64_t) -1, /* disable TasksMax= for the scope, rely on the slice setting for it */ | |
523 | &error, | |
524 | &job); | |
d0af76e6 | 525 | if (r < 0) { |
90558f31 | 526 | log_error_errno(r, "Failed to start session scope %s: %s", scope, bus_error_message(&error, r)); |
d0af76e6 | 527 | free(scope); |
f2d4f98d | 528 | return r; |
d0af76e6 LP |
529 | } else { |
530 | s->scope = scope; | |
531 | ||
532 | free(s->scope_job); | |
533 | s->scope_job = job; | |
534 | } | |
20263082 LP |
535 | } |
536 | ||
d0af76e6 | 537 | if (s->scope) |
90558f31 | 538 | (void) hashmap_put(s->manager->session_units, s->scope, s); |
d0af76e6 | 539 | |
20263082 LP |
540 | return 0; |
541 | } | |
542 | ||
543 | int session_start(Session *s) { | |
544 | int r; | |
545 | ||
546 | assert(s); | |
9444b1f2 LP |
547 | |
548 | if (!s->user) | |
549 | return -ESTALE; | |
20263082 | 550 | |
9418f147 LP |
551 | if (s->started) |
552 | return 0; | |
553 | ||
ed18b08b LP |
554 | r = user_start(s->user); |
555 | if (r < 0) | |
556 | return r; | |
557 | ||
fb6becb4 LP |
558 | /* Create cgroup */ |
559 | r = session_start_scope(s); | |
560 | if (r < 0) | |
561 | return r; | |
562 | ||
d9eb81f9 | 563 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 564 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_START), |
877d54e9 LP |
565 | "SESSION_ID=%s", s->id, |
566 | "USER_ID=%s", s->user->name, | |
de0671ee | 567 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 568 | LOG_MESSAGE("New session %s of user %s.", s->id, s->user->name), |
877d54e9 | 569 | NULL); |
98a28fef | 570 | |
9444b1f2 LP |
571 | if (!dual_timestamp_is_set(&s->timestamp)) |
572 | dual_timestamp_get(&s->timestamp); | |
14c3baca | 573 | |
e9816c48 LP |
574 | if (s->seat) |
575 | seat_read_active_vt(s->seat); | |
576 | ||
9418f147 LP |
577 | s->started = true; |
578 | ||
952d3260 LP |
579 | user_elect_display(s->user); |
580 | ||
5f41d1f1 | 581 | /* Save data */ |
e9816c48 | 582 | session_save(s); |
7f7bb946 | 583 | user_save(s->user); |
5f41d1f1 LP |
584 | if (s->seat) |
585 | seat_save(s->seat); | |
e9816c48 | 586 | |
5f41d1f1 | 587 | /* Send signals */ |
da119395 | 588 | session_send_signal(s, true); |
7d049e30 | 589 | user_send_changed(s->user, "Display", NULL); |
9418f147 LP |
590 | if (s->seat) { |
591 | if (s->seat->active == s) | |
7d049e30 | 592 | seat_send_changed(s->seat, "ActiveSession", NULL); |
9418f147 LP |
593 | } |
594 | ||
20263082 LP |
595 | return 0; |
596 | } | |
597 | ||
9bb69af4 | 598 | static int session_stop_scope(Session *s, bool force) { |
4afd3348 | 599 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
20263082 | 600 | int r; |
20263082 LP |
601 | |
602 | assert(s); | |
603 | ||
fb6becb4 LP |
604 | if (!s->scope) |
605 | return 0; | |
9b221b63 | 606 | |
756ed0e2 | 607 | /* Let's always abandon the scope first. This tells systemd that we are not interested anymore, and everything |
629ff674 | 608 | * that is left in the scope is "left-over". Informing systemd about this has the benefit that it will log |
756ed0e2 LP |
609 | * when killing any processes left after this point. */ |
610 | r = manager_abandon_scope(s->manager, s->scope, &error); | |
611 | if (r < 0) | |
612 | log_warning_errno(r, "Failed to abandon session scope, ignoring: %s", bus_error_message(&error, r)); | |
613 | ||
614 | /* Optionally, let's kill everything that's left now. */ | |
9bb69af4 | 615 | if (force || manager_shall_kill(s->manager, s->user->name)) { |
801a884d LP |
616 | char *job = NULL; |
617 | ||
5f41d1f1 | 618 | r = manager_stop_unit(s->manager, s->scope, &error, &job); |
801a884d LP |
619 | if (r < 0) |
620 | return log_error_errno(r, "Failed to stop session scope: %s", bus_error_message(&error, r)); | |
20263082 | 621 | |
5f41d1f1 LP |
622 | free(s->scope_job); |
623 | s->scope_job = job; | |
756ed0e2 LP |
624 | } else |
625 | s->scope_job = mfree(s->scope_job); | |
20263082 | 626 | |
9b221b63 | 627 | return 0; |
20263082 LP |
628 | } |
629 | ||
9bb69af4 | 630 | int session_stop(Session *s, bool force) { |
405e0255 LP |
631 | int r; |
632 | ||
633 | assert(s); | |
634 | ||
635 | if (!s->user) | |
636 | return -ESTALE; | |
637 | ||
5f41d1f1 LP |
638 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
639 | ||
10189fd6 DH |
640 | if (s->seat) |
641 | seat_evict_position(s->seat, s); | |
642 | ||
5f41d1f1 LP |
643 | /* We are going down, don't care about FIFOs anymore */ |
644 | session_remove_fifo(s); | |
645 | ||
405e0255 | 646 | /* Kill cgroup */ |
9bb69af4 | 647 | r = session_stop_scope(s, force); |
405e0255 | 648 | |
5f41d1f1 LP |
649 | s->stopping = true; |
650 | ||
952d3260 LP |
651 | user_elect_display(s->user); |
652 | ||
405e0255 | 653 | session_save(s); |
cc377381 | 654 | user_save(s->user); |
405e0255 LP |
655 | |
656 | return r; | |
657 | } | |
658 | ||
659 | int session_finalize(Session *s) { | |
118ecf32 | 660 | SessionDevice *sd; |
20263082 LP |
661 | |
662 | assert(s); | |
663 | ||
9444b1f2 LP |
664 | if (!s->user) |
665 | return -ESTALE; | |
666 | ||
ed18b08b | 667 | if (s->started) |
d9eb81f9 | 668 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
e2cc6eca | 669 | LOG_MESSAGE_ID(SD_MESSAGE_SESSION_STOP), |
877d54e9 LP |
670 | "SESSION_ID=%s", s->id, |
671 | "USER_ID=%s", s->user->name, | |
de0671ee | 672 | "LEADER="PID_FMT, s->leader, |
e2cc6eca | 673 | LOG_MESSAGE("Removed session %s.", s->id), |
877d54e9 | 674 | NULL); |
98a28fef | 675 | |
5f41d1f1 LP |
676 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
677 | ||
10189fd6 DH |
678 | if (s->seat) |
679 | seat_evict_position(s->seat, s); | |
680 | ||
118ecf32 DH |
681 | /* Kill session devices */ |
682 | while ((sd = hashmap_first(s->devices))) | |
683 | session_device_free(sd); | |
684 | ||
491ac9f2 | 685 | (void) unlink(s->state_file); |
d2f92cdf | 686 | session_add_to_gc_queue(s); |
ed18b08b | 687 | user_add_to_gc_queue(s->user); |
14c3baca | 688 | |
405e0255 | 689 | if (s->started) { |
ed18b08b | 690 | session_send_signal(s, false); |
405e0255 LP |
691 | s->started = false; |
692 | } | |
50fb9793 | 693 | |
9418f147 LP |
694 | if (s->seat) { |
695 | if (s->seat->active == s) | |
696 | seat_set_active(s->seat, NULL); | |
697 | ||
23bd3b62 | 698 | seat_save(s->seat); |
9418f147 LP |
699 | } |
700 | ||
23bd3b62 | 701 | user_save(s->user); |
7d049e30 | 702 | user_send_changed(s->user, "Display", NULL); |
9418f147 | 703 | |
491ac9f2 | 704 | return 0; |
20263082 LP |
705 | } |
706 | ||
5f41d1f1 LP |
707 | static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { |
708 | Session *s = userdata; | |
709 | ||
710 | assert(es); | |
711 | assert(s); | |
712 | ||
9bb69af4 | 713 | session_stop(s, false); |
5f41d1f1 LP |
714 | return 0; |
715 | } | |
716 | ||
ad8780c9 | 717 | int session_release(Session *s) { |
5f41d1f1 LP |
718 | assert(s); |
719 | ||
720 | if (!s->started || s->stopping) | |
ad8780c9 ZJS |
721 | return 0; |
722 | ||
723 | if (s->timer_event_source) | |
724 | return 0; | |
725 | ||
726 | return sd_event_add_time(s->manager->event, | |
727 | &s->timer_event_source, | |
728 | CLOCK_MONOTONIC, | |
729 | now(CLOCK_MONOTONIC) + RELEASE_USEC, 0, | |
730 | release_timeout_callback, s); | |
5f41d1f1 LP |
731 | } |
732 | ||
20263082 LP |
733 | bool session_is_active(Session *s) { |
734 | assert(s); | |
735 | ||
736 | if (!s->seat) | |
737 | return true; | |
738 | ||
739 | return s->seat->active == s; | |
740 | } | |
741 | ||
23406ce5 LP |
742 | static int get_tty_atime(const char *tty, usec_t *atime) { |
743 | _cleanup_free_ char *p = NULL; | |
a185c5aa | 744 | struct stat st; |
23406ce5 LP |
745 | |
746 | assert(tty); | |
747 | assert(atime); | |
748 | ||
749 | if (!path_is_absolute(tty)) { | |
750 | p = strappend("/dev/", tty); | |
751 | if (!p) | |
752 | return -ENOMEM; | |
753 | ||
754 | tty = p; | |
755 | } else if (!path_startswith(tty, "/dev/")) | |
756 | return -ENOENT; | |
757 | ||
758 | if (lstat(tty, &st) < 0) | |
759 | return -errno; | |
760 | ||
761 | *atime = timespec_load(&st.st_atim); | |
762 | return 0; | |
763 | } | |
764 | ||
765 | static int get_process_ctty_atime(pid_t pid, usec_t *atime) { | |
766 | _cleanup_free_ char *p = NULL; | |
767 | int r; | |
768 | ||
769 | assert(pid > 0); | |
770 | assert(atime); | |
771 | ||
772 | r = get_ctty(pid, NULL, &p); | |
773 | if (r < 0) | |
774 | return r; | |
775 | ||
776 | return get_tty_atime(p, atime); | |
777 | } | |
778 | ||
779 | int session_get_idle_hint(Session *s, dual_timestamp *t) { | |
23406ce5 LP |
780 | usec_t atime = 0, n; |
781 | int r; | |
a185c5aa LP |
782 | |
783 | assert(s); | |
784 | ||
23406ce5 | 785 | /* Explicit idle hint is set */ |
a185c5aa LP |
786 | if (s->idle_hint) { |
787 | if (t) | |
788 | *t = s->idle_hint_timestamp; | |
789 | ||
790 | return s->idle_hint; | |
791 | } | |
792 | ||
0762eaa3 | 793 | /* Graphical sessions should really implement a real |
23406ce5 | 794 | * idle hint logic */ |
129baf1b | 795 | if (SESSION_TYPE_IS_GRAPHICAL(s->type)) |
a185c5aa LP |
796 | goto dont_know; |
797 | ||
23406ce5 LP |
798 | /* For sessions with an explicitly configured tty, let's check |
799 | * its atime */ | |
800 | if (s->tty) { | |
801 | r = get_tty_atime(s->tty, &atime); | |
802 | if (r >= 0) | |
803 | goto found_atime; | |
804 | } | |
a185c5aa | 805 | |
23406ce5 LP |
806 | /* For sessions with a leader but no explicitly configured |
807 | * tty, let's check the controlling tty of the leader */ | |
808 | if (s->leader > 0) { | |
809 | r = get_process_ctty_atime(s->leader, &atime); | |
810 | if (r >= 0) | |
811 | goto found_atime; | |
a185c5aa LP |
812 | } |
813 | ||
a185c5aa LP |
814 | dont_know: |
815 | if (t) | |
816 | *t = s->idle_hint_timestamp; | |
817 | ||
818 | return 0; | |
23406ce5 LP |
819 | |
820 | found_atime: | |
821 | if (t) | |
822 | dual_timestamp_from_realtime(t, atime); | |
823 | ||
824 | n = now(CLOCK_REALTIME); | |
825 | ||
826 | if (s->manager->idle_action_usec <= 0) | |
827 | return 0; | |
828 | ||
829 | return atime + s->manager->idle_action_usec <= n; | |
a185c5aa LP |
830 | } |
831 | ||
bef422ae LP |
832 | void session_set_idle_hint(Session *s, bool b) { |
833 | assert(s); | |
834 | ||
835 | if (s->idle_hint == b) | |
836 | return; | |
837 | ||
838 | s->idle_hint = b; | |
839 | dual_timestamp_get(&s->idle_hint_timestamp); | |
9418f147 | 840 | |
cc377381 | 841 | session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
9418f147 LP |
842 | |
843 | if (s->seat) | |
cc377381 LP |
844 | seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
845 | ||
846 | user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
847 | manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
848 | } | |
849 | ||
42d35e13 VT |
850 | int session_get_locked_hint(Session *s) { |
851 | assert(s); | |
852 | ||
853 | return s->locked_hint; | |
854 | } | |
855 | ||
856 | void session_set_locked_hint(Session *s, bool b) { | |
857 | assert(s); | |
858 | ||
859 | if (s->locked_hint == b) | |
860 | return; | |
861 | ||
862 | s->locked_hint = b; | |
863 | ||
864 | session_send_changed(s, "LockedHint", NULL); | |
865 | } | |
866 | ||
cc377381 LP |
867 | static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
868 | Session *s = userdata; | |
869 | ||
870 | assert(s); | |
871 | assert(s->fifo_fd == fd); | |
872 | ||
873 | /* EOF on the FIFO means the session died abnormally. */ | |
874 | ||
875 | session_remove_fifo(s); | |
9bb69af4 | 876 | session_stop(s, false); |
cc377381 LP |
877 | |
878 | return 1; | |
bef422ae LP |
879 | } |
880 | ||
932e3ee7 LP |
881 | int session_create_fifo(Session *s) { |
882 | int r; | |
883 | ||
31b79c2b LP |
884 | assert(s); |
885 | ||
b4f78aea | 886 | /* Create FIFO */ |
932e3ee7 | 887 | if (!s->fifo_path) { |
d2e54fae | 888 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0); |
e6061ab2 LP |
889 | if (r < 0) |
890 | return r; | |
891 | ||
932e3ee7 LP |
892 | if (asprintf(&s->fifo_path, "/run/systemd/sessions/%s.ref", s->id) < 0) |
893 | return -ENOMEM; | |
31b79c2b | 894 | |
932e3ee7 LP |
895 | if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST) |
896 | return -errno; | |
897 | } | |
31b79c2b | 898 | |
932e3ee7 | 899 | /* Open reading side */ |
b4f78aea | 900 | if (s->fifo_fd < 0) { |
b4f78aea LP |
901 | s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NDELAY); |
902 | if (s->fifo_fd < 0) | |
903 | return -errno; | |
904 | ||
cc377381 LP |
905 | } |
906 | ||
907 | if (!s->fifo_event_source) { | |
151b9b96 | 908 | r = sd_event_add_io(s->manager->event, &s->fifo_event_source, s->fifo_fd, 0, session_dispatch_fifo, s); |
b4f78aea LP |
909 | if (r < 0) |
910 | return r; | |
911 | ||
e11544a8 LP |
912 | /* Let's make sure we noticed dead sessions before we process new bus requests (which might create new |
913 | * sessions). */ | |
914 | r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_NORMAL-10); | |
cc377381 LP |
915 | if (r < 0) |
916 | return r; | |
b4f78aea | 917 | } |
932e3ee7 LP |
918 | |
919 | /* Open writing side */ | |
920 | r = open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NDELAY); | |
921 | if (r < 0) | |
922 | return -errno; | |
31b79c2b | 923 | |
932e3ee7 LP |
924 | return r; |
925 | } | |
926 | ||
5f41d1f1 | 927 | static void session_remove_fifo(Session *s) { |
932e3ee7 LP |
928 | assert(s); |
929 | ||
03e334a1 LP |
930 | s->fifo_event_source = sd_event_source_unref(s->fifo_event_source); |
931 | s->fifo_fd = safe_close(s->fifo_fd); | |
932e3ee7 LP |
932 | |
933 | if (s->fifo_path) { | |
934 | unlink(s->fifo_path); | |
a1e58e8e | 935 | s->fifo_path = mfree(s->fifo_path); |
932e3ee7 | 936 | } |
31b79c2b LP |
937 | } |
938 | ||
cc377381 | 939 | bool session_check_gc(Session *s, bool drop_not_started) { |
20263082 LP |
940 | assert(s); |
941 | ||
4a4b033f | 942 | if (drop_not_started && !s->started) |
cc377381 | 943 | return false; |
932e3ee7 | 944 | |
9444b1f2 | 945 | if (!s->user) |
cc377381 | 946 | return false; |
9444b1f2 | 947 | |
932e3ee7 | 948 | if (s->fifo_fd >= 0) { |
5f41d1f1 | 949 | if (pipe_eof(s->fifo_fd) <= 0) |
cc377381 | 950 | return true; |
20263082 LP |
951 | } |
952 | ||
cc377381 LP |
953 | if (s->scope_job && manager_job_is_active(s->manager, s->scope_job)) |
954 | return true; | |
20263082 | 955 | |
cc377381 LP |
956 | if (s->scope && manager_unit_is_active(s->manager, s->scope)) |
957 | return true; | |
20263082 | 958 | |
cc377381 | 959 | return false; |
20263082 LP |
960 | } |
961 | ||
14c3baca LP |
962 | void session_add_to_gc_queue(Session *s) { |
963 | assert(s); | |
964 | ||
965 | if (s->in_gc_queue) | |
966 | return; | |
967 | ||
71fda00f | 968 | LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s); |
14c3baca LP |
969 | s->in_gc_queue = true; |
970 | } | |
971 | ||
0604381b LP |
972 | SessionState session_get_state(Session *s) { |
973 | assert(s); | |
974 | ||
8fe63cd4 | 975 | /* always check closing first */ |
5f41d1f1 LP |
976 | if (s->stopping || s->timer_event_source) |
977 | return SESSION_CLOSING; | |
978 | ||
8fe63cd4 | 979 | if (s->scope_job || s->fifo_fd < 0) |
405e0255 | 980 | return SESSION_OPENING; |
fb6becb4 | 981 | |
0604381b LP |
982 | if (session_is_active(s)) |
983 | return SESSION_ACTIVE; | |
984 | ||
985 | return SESSION_ONLINE; | |
986 | } | |
987 | ||
de07ab16 | 988 | int session_kill(Session *s, KillWho who, int signo) { |
de07ab16 LP |
989 | assert(s); |
990 | ||
fb6becb4 | 991 | if (!s->scope) |
de07ab16 LP |
992 | return -ESRCH; |
993 | ||
fb6becb4 | 994 | return manager_kill_unit(s->manager, s->scope, who, signo, NULL); |
de07ab16 LP |
995 | } |
996 | ||
90a18413 | 997 | static int session_open_vt(Session *s) { |
5f41d1f1 | 998 | char path[sizeof("/dev/tty") + DECIMAL_STR_MAX(s->vtnr)]; |
90a18413 | 999 | |
baccf3e4 OB |
1000 | if (s->vtnr < 1) |
1001 | return -ENODEV; | |
90a18413 DH |
1002 | |
1003 | if (s->vtfd >= 0) | |
1004 | return s->vtfd; | |
1005 | ||
92bd5ff3 | 1006 | sprintf(path, "/dev/tty%u", s->vtnr); |
22356953 | 1007 | s->vtfd = open_terminal(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY); |
4a62c710 | 1008 | if (s->vtfd < 0) |
709f6e46 | 1009 | return log_error_errno(s->vtfd, "cannot open VT %s of session %s: %m", path, s->id); |
90a18413 DH |
1010 | |
1011 | return s->vtfd; | |
1012 | } | |
1013 | ||
baccf3e4 | 1014 | int session_prepare_vt(Session *s) { |
90a18413 DH |
1015 | int vt, r; |
1016 | struct vt_mode mode = { 0 }; | |
90a18413 | 1017 | |
baccf3e4 OB |
1018 | if (s->vtnr < 1) |
1019 | return 0; | |
1020 | ||
90a18413 DH |
1021 | vt = session_open_vt(s); |
1022 | if (vt < 0) | |
baccf3e4 | 1023 | return vt; |
90a18413 | 1024 | |
d6176c6c | 1025 | r = fchown(vt, s->user->uid, -1); |
baccf3e4 | 1026 | if (r < 0) { |
94c156cd LP |
1027 | r = log_error_errno(errno, |
1028 | "Cannot change owner of /dev/tty%u: %m", | |
1029 | s->vtnr); | |
d6176c6c | 1030 | goto error; |
baccf3e4 | 1031 | } |
d6176c6c | 1032 | |
90a18413 | 1033 | r = ioctl(vt, KDSKBMODE, K_OFF); |
baccf3e4 | 1034 | if (r < 0) { |
94c156cd LP |
1035 | r = log_error_errno(errno, |
1036 | "Cannot set K_OFF on /dev/tty%u: %m", | |
1037 | s->vtnr); | |
90a18413 | 1038 | goto error; |
baccf3e4 | 1039 | } |
90a18413 DH |
1040 | |
1041 | r = ioctl(vt, KDSETMODE, KD_GRAPHICS); | |
baccf3e4 | 1042 | if (r < 0) { |
94c156cd LP |
1043 | r = log_error_errno(errno, |
1044 | "Cannot set KD_GRAPHICS on /dev/tty%u: %m", | |
1045 | s->vtnr); | |
90a18413 | 1046 | goto error; |
baccf3e4 | 1047 | } |
90a18413 | 1048 | |
90a18413 DH |
1049 | /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS. |
1050 | * So we need a dummy handler here which just acknowledges *all* VT | |
1051 | * switch requests. */ | |
1052 | mode.mode = VT_PROCESS; | |
92683ad2 DH |
1053 | mode.relsig = SIGRTMIN; |
1054 | mode.acqsig = SIGRTMIN + 1; | |
90a18413 | 1055 | r = ioctl(vt, VT_SETMODE, &mode); |
baccf3e4 | 1056 | if (r < 0) { |
94c156cd LP |
1057 | r = log_error_errno(errno, |
1058 | "Cannot set VT_PROCESS on /dev/tty%u: %m", | |
1059 | s->vtnr); | |
90a18413 | 1060 | goto error; |
baccf3e4 | 1061 | } |
90a18413 | 1062 | |
baccf3e4 | 1063 | return 0; |
90a18413 DH |
1064 | |
1065 | error: | |
90a18413 | 1066 | session_restore_vt(s); |
baccf3e4 | 1067 | return r; |
90a18413 DH |
1068 | } |
1069 | ||
1070 | void session_restore_vt(Session *s) { | |
16597ac3 LP |
1071 | |
1072 | static const struct vt_mode mode = { | |
1073 | .mode = VT_AUTO, | |
1074 | }; | |
1075 | ||
a0eb2a75 | 1076 | _cleanup_free_ char *utf8 = NULL; |
16597ac3 | 1077 | int vt, kb, old_fd; |
90a18413 | 1078 | |
128df4cf OT |
1079 | /* We need to get a fresh handle to the virtual terminal, |
1080 | * since the old file-descriptor is potentially in a hung-up | |
1081 | * state after the controlling process exited; we do a | |
1082 | * little dance to avoid having the terminal be available | |
1083 | * for reuse before we've cleaned it up. | |
1084 | */ | |
16597ac3 | 1085 | old_fd = s->vtfd; |
128df4cf OT |
1086 | s->vtfd = -1; |
1087 | ||
90a18413 | 1088 | vt = session_open_vt(s); |
128df4cf OT |
1089 | safe_close(old_fd); |
1090 | ||
90a18413 DH |
1091 | if (vt < 0) |
1092 | return; | |
1093 | ||
2bf10523 | 1094 | (void) ioctl(vt, KDSETMODE, KD_TEXT); |
90a18413 DH |
1095 | |
1096 | if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8) >= 0 && *utf8 == '1') | |
1097 | kb = K_UNICODE; | |
16597ac3 LP |
1098 | else |
1099 | kb = K_XLATE; | |
03e334a1 | 1100 | |
2bf10523 | 1101 | (void) ioctl(vt, KDSKBMODE, kb); |
90a18413 | 1102 | |
2bf10523 | 1103 | (void) ioctl(vt, VT_SETMODE, &mode); |
16597ac3 | 1104 | (void) fchown(vt, 0, (gid_t) -1); |
d6176c6c | 1105 | |
03e334a1 | 1106 | s->vtfd = safe_close(s->vtfd); |
90a18413 DH |
1107 | } |
1108 | ||
2ec3ff66 | 1109 | void session_leave_vt(Session *s) { |
ce540a24 DH |
1110 | int r; |
1111 | ||
2ec3ff66 DH |
1112 | assert(s); |
1113 | ||
1114 | /* This is called whenever we get a VT-switch signal from the kernel. | |
1115 | * We acknowledge all of them unconditionally. Note that session are | |
1116 | * free to overwrite those handlers and we only register them for | |
1117 | * sessions with controllers. Legacy sessions are not affected. | |
1118 | * However, if we switch from a non-legacy to a legacy session, we must | |
1119 | * make sure to pause all device before acknowledging the switch. We | |
1120 | * process the real switch only after we are notified via sysfs, so the | |
1121 | * legacy session might have already started using the devices. If we | |
1122 | * don't pause the devices before the switch, we might confuse the | |
1123 | * session we switch to. */ | |
1124 | ||
1125 | if (s->vtfd < 0) | |
1126 | return; | |
1127 | ||
1128 | session_device_pause_all(s); | |
ce540a24 DH |
1129 | r = ioctl(s->vtfd, VT_RELDISP, 1); |
1130 | if (r < 0) | |
56f64d95 | 1131 | log_debug_errno(errno, "Cannot release VT of session %s: %m", s->id); |
2ec3ff66 DH |
1132 | } |
1133 | ||
cc377381 | 1134 | bool session_is_controller(Session *s, const char *sender) { |
ae5e06bd DH |
1135 | assert(s); |
1136 | ||
1137 | return streq_ptr(s->controller, sender); | |
1138 | } | |
1139 | ||
b12e5615 DH |
1140 | static void session_release_controller(Session *s, bool notify) { |
1141 | _cleanup_free_ char *name = NULL; | |
6d33772f DH |
1142 | SessionDevice *sd; |
1143 | ||
b12e5615 DH |
1144 | if (!s->controller) |
1145 | return; | |
6d33772f | 1146 | |
b12e5615 | 1147 | name = s->controller; |
90a18413 | 1148 | |
b12e5615 DH |
1149 | /* By resetting the controller before releasing the devices, we won't |
1150 | * send notification signals. This avoids sending useless notifications | |
1151 | * if the controller is released on disconnects. */ | |
1152 | if (!notify) | |
1153 | s->controller = NULL; | |
6d33772f | 1154 | |
b12e5615 DH |
1155 | while ((sd = hashmap_first(s->devices))) |
1156 | session_device_free(sd); | |
1157 | ||
1158 | s->controller = NULL; | |
3cde9e8f DM |
1159 | s->track = sd_bus_track_unref(s->track); |
1160 | } | |
1161 | ||
1162 | static int on_bus_track(sd_bus_track *track, void *userdata) { | |
1163 | Session *s = userdata; | |
1164 | ||
1165 | assert(track); | |
1166 | assert(s); | |
1167 | ||
1168 | session_drop_controller(s); | |
1169 | ||
1170 | return 0; | |
6d33772f DH |
1171 | } |
1172 | ||
ae5e06bd | 1173 | int session_set_controller(Session *s, const char *sender, bool force) { |
b12e5615 | 1174 | _cleanup_free_ char *name = NULL; |
ae5e06bd DH |
1175 | int r; |
1176 | ||
1177 | assert(s); | |
1178 | assert(sender); | |
1179 | ||
1180 | if (session_is_controller(s, sender)) | |
1181 | return 0; | |
1182 | if (s->controller && !force) | |
1183 | return -EBUSY; | |
1184 | ||
b12e5615 DH |
1185 | name = strdup(sender); |
1186 | if (!name) | |
ae5e06bd DH |
1187 | return -ENOMEM; |
1188 | ||
3cde9e8f DM |
1189 | s->track = sd_bus_track_unref(s->track); |
1190 | r = sd_bus_track_new(s->manager->bus, &s->track, on_bus_track, s); | |
1191 | if (r < 0) | |
1192 | return r; | |
1193 | ||
1194 | r = sd_bus_track_add_name(s->track, name); | |
1195 | if (r < 0) | |
ae5e06bd | 1196 | return r; |
ae5e06bd | 1197 | |
90a18413 DH |
1198 | /* When setting a session controller, we forcibly mute the VT and set |
1199 | * it into graphics-mode. Applications can override that by changing | |
1200 | * VT state after calling TakeControl(). However, this serves as a good | |
1201 | * default and well-behaving controllers can now ignore VTs entirely. | |
1202 | * Note that we reset the VT on ReleaseControl() and if the controller | |
1203 | * exits. | |
1204 | * If logind crashes/restarts, we restore the controller during restart | |
1205 | * or reset the VT in case it crashed/exited, too. */ | |
baccf3e4 | 1206 | r = session_prepare_vt(s); |
13f493dc | 1207 | if (r < 0) { |
3cde9e8f | 1208 | s->track = sd_bus_track_unref(s->track); |
baccf3e4 | 1209 | return r; |
13f493dc | 1210 | } |
baccf3e4 | 1211 | |
b12e5615 DH |
1212 | session_release_controller(s, true); |
1213 | s->controller = name; | |
1214 | name = NULL; | |
1215 | session_save(s); | |
90a18413 | 1216 | |
ae5e06bd DH |
1217 | return 0; |
1218 | } | |
1219 | ||
1220 | void session_drop_controller(Session *s) { | |
1221 | assert(s); | |
1222 | ||
1223 | if (!s->controller) | |
1224 | return; | |
1225 | ||
3cde9e8f | 1226 | s->track = sd_bus_track_unref(s->track); |
b12e5615 DH |
1227 | session_release_controller(s, false); |
1228 | session_save(s); | |
1229 | session_restore_vt(s); | |
ae5e06bd DH |
1230 | } |
1231 | ||
fb6becb4 LP |
1232 | static const char* const session_state_table[_SESSION_STATE_MAX] = { |
1233 | [SESSION_OPENING] = "opening", | |
0604381b LP |
1234 | [SESSION_ONLINE] = "online", |
1235 | [SESSION_ACTIVE] = "active", | |
1236 | [SESSION_CLOSING] = "closing" | |
1237 | }; | |
1238 | ||
1239 | DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState); | |
1240 | ||
20263082 | 1241 | static const char* const session_type_table[_SESSION_TYPE_MAX] = { |
2c5859af | 1242 | [SESSION_UNSPECIFIED] = "unspecified", |
3f49d45a | 1243 | [SESSION_TTY] = "tty", |
98a28fef | 1244 | [SESSION_X11] = "x11", |
d9eb81f9 | 1245 | [SESSION_WAYLAND] = "wayland", |
9541666b | 1246 | [SESSION_MIR] = "mir", |
e9e74f28 | 1247 | [SESSION_WEB] = "web", |
20263082 LP |
1248 | }; |
1249 | ||
1250 | DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType); | |
de07ab16 | 1251 | |
55efac6c LP |
1252 | static const char* const session_class_table[_SESSION_CLASS_MAX] = { |
1253 | [SESSION_USER] = "user", | |
1254 | [SESSION_GREETER] = "greeter", | |
e2acb67b LP |
1255 | [SESSION_LOCK_SCREEN] = "lock-screen", |
1256 | [SESSION_BACKGROUND] = "background" | |
55efac6c LP |
1257 | }; |
1258 | ||
1259 | DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass); | |
1260 | ||
de07ab16 LP |
1261 | static const char* const kill_who_table[_KILL_WHO_MAX] = { |
1262 | [KILL_LEADER] = "leader", | |
1263 | [KILL_ALL] = "all" | |
1264 | }; | |
1265 | ||
1266 | DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); |