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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
20263082 LP |
2 | |
3 | #include <errno.h> | |
90a18413 | 4 | #include <fcntl.h> |
90a18413 | 5 | #include <linux/kd.h> |
4f5dd394 | 6 | #include <linux/vt.h> |
90a18413 | 7 | #include <signal.h> |
90a18413 | 8 | #include <sys/ioctl.h> |
ca78ad1d | 9 | #include <sys/stat.h> |
20263082 LP |
10 | #include <unistd.h> |
11 | ||
cc377381 | 12 | #include "sd-messages.h" |
4f5dd394 | 13 | |
b5efdb8a | 14 | #include "alloc-util.h" |
430f0182 | 15 | #include "audit-util.h" |
cc377381 | 16 | #include "bus-error.h" |
4f5dd394 | 17 | #include "bus-util.h" |
9d5b6901 | 18 | #include "daemon-util.h" |
7176f06c | 19 | #include "devnum-util.h" |
686d13b9 | 20 | #include "env-file.h" |
4f5dd394 | 21 | #include "escape.h" |
3ffd4af2 | 22 | #include "fd-util.h" |
4f5dd394 | 23 | #include "fileio.h" |
f97b34a6 | 24 | #include "format-util.h" |
70f1280c | 25 | #include "fs-util.h" |
c004493c | 26 | #include "io-util.h" |
6ecda0fb LP |
27 | #include "logind-dbus.h" |
28 | #include "logind-seat-dbus.h" | |
29 | #include "logind-session-dbus.h" | |
3ffd4af2 | 30 | #include "logind-session.h" |
6ecda0fb | 31 | #include "logind-user-dbus.h" |
35cd0ba5 | 32 | #include "mkdir-label.h" |
6bedfcbb | 33 | #include "parse-util.h" |
4f5dd394 | 34 | #include "path-util.h" |
8c29a457 | 35 | #include "process-util.h" |
d68c645b | 36 | #include "serialize.h" |
8b43440b | 37 | #include "string-table.h" |
25a1ab4e | 38 | #include "strv.h" |
288a74cc | 39 | #include "terminal-util.h" |
e4de7287 | 40 | #include "tmpfile-util.h" |
278e815b | 41 | #include "uid-alloc-range.h" |
b1d4f8e1 | 42 | #include "user-util.h" |
20263082 | 43 | |
5f41d1f1 LP |
44 | #define RELEASE_USEC (20*USEC_PER_SEC) |
45 | ||
46 | static void session_remove_fifo(Session *s); | |
0212126c | 47 | static void session_restore_vt(Session *s); |
5f41d1f1 | 48 | |
8c29a457 LP |
49 | int session_new(Session **ret, Manager *m, const char *id) { |
50 | _cleanup_(session_freep) Session *s = NULL; | |
51 | int r; | |
20263082 | 52 | |
8c29a457 | 53 | assert(ret); |
20263082 LP |
54 | assert(m); |
55 | assert(id); | |
56 | ||
8c29a457 LP |
57 | if (!session_id_valid(id)) |
58 | return -EINVAL; | |
59 | ||
60 | s = new(Session, 1); | |
20263082 | 61 | if (!s) |
8c29a457 LP |
62 | return -ENOMEM; |
63 | ||
64 | *s = (Session) { | |
65 | .manager = m, | |
254d1313 ZJS |
66 | .fifo_fd = -EBADF, |
67 | .vtfd = -EBADF, | |
8c29a457 | 68 | .audit_id = AUDIT_SESSION_INVALID, |
3d0ef5c7 | 69 | .tty_validity = _TTY_VALIDITY_INVALID, |
89bad70f | 70 | .leader = PIDREF_NULL, |
8c29a457 | 71 | }; |
20263082 | 72 | |
b910cc72 | 73 | s->state_file = path_join("/run/systemd/sessions", id); |
6b430fdb | 74 | if (!s->state_file) |
8c29a457 | 75 | return -ENOMEM; |
118ecf32 | 76 | |
2b6bf07d | 77 | s->id = basename(s->state_file); |
20263082 | 78 | |
8c29a457 LP |
79 | s->devices = hashmap_new(&devt_hash_ops); |
80 | if (!s->devices) | |
81 | return -ENOMEM; | |
20263082 | 82 | |
8c29a457 LP |
83 | r = hashmap_put(m->sessions, s->id, s); |
84 | if (r < 0) | |
85 | return r; | |
20263082 | 86 | |
8c29a457 LP |
87 | *ret = TAKE_PTR(s); |
88 | return 0; | |
20263082 LP |
89 | } |
90 | ||
0ae9073f MY |
91 | static int session_dispatch_leader_pidfd(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
92 | Session *s = ASSERT_PTR(userdata); | |
93 | ||
94 | assert(s->leader.fd == fd); | |
95 | session_stop(s, /* force= */ false); | |
96 | ||
97 | return 1; | |
98 | } | |
99 | ||
100 | static int session_watch_pidfd(Session *s) { | |
101 | int r; | |
102 | ||
103 | assert(s); | |
104 | assert(s->manager); | |
105 | assert(pidref_is_set(&s->leader)); | |
106 | ||
107 | if (s->leader.fd < 0) | |
108 | return 0; | |
109 | ||
110 | r = sd_event_add_io(s->manager->event, &s->leader_pidfd_event_source, s->leader.fd, EPOLLIN, session_dispatch_leader_pidfd, s); | |
111 | if (r < 0) | |
112 | return r; | |
113 | ||
114 | r = sd_event_source_set_priority(s->leader_pidfd_event_source, SD_EVENT_PRIORITY_IMPORTANT); | |
115 | if (r < 0) | |
116 | return r; | |
117 | ||
118 | (void) sd_event_source_set_description(s->leader_pidfd_event_source, "session-pidfd"); | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
9d5b6901 | 123 | static void session_reset_leader(Session *s, bool keep_fdstore) { |
8494f562 MY |
124 | assert(s); |
125 | ||
9d5b6901 MY |
126 | if (!keep_fdstore) { |
127 | /* Clear fdstore if we're asked to, no matter if s->leader is set or not, so that when | |
128 | * initially deserializing leader fd we clear the old fd too. */ | |
129 | (void) notify_remove_fd_warnf("session-%s-leader-fd", s->id); | |
130 | s->leader_fd_saved = false; | |
131 | } | |
132 | ||
8494f562 MY |
133 | if (!pidref_is_set(&s->leader)) |
134 | return; | |
135 | ||
0ae9073f MY |
136 | s->leader_pidfd_event_source = sd_event_source_disable_unref(s->leader_pidfd_event_source); |
137 | ||
889975bb | 138 | (void) hashmap_remove_value(s->manager->sessions_by_leader, &s->leader, s); |
8494f562 MY |
139 | |
140 | return pidref_done(&s->leader); | |
141 | } | |
142 | ||
8c29a457 | 143 | Session* session_free(Session *s) { |
118ecf32 DH |
144 | SessionDevice *sd; |
145 | ||
8c29a457 LP |
146 | if (!s) |
147 | return NULL; | |
20263082 | 148 | |
14c3baca | 149 | if (s->in_gc_queue) |
71fda00f | 150 | LIST_REMOVE(gc_queue, s->manager->session_gc_queue, s); |
14c3baca | 151 | |
5f41d1f1 LP |
152 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
153 | ||
ae5e06bd DH |
154 | session_drop_controller(s); |
155 | ||
118ecf32 DH |
156 | while ((sd = hashmap_first(s->devices))) |
157 | session_device_free(sd); | |
158 | ||
159 | hashmap_free(s->devices); | |
160 | ||
20263082 | 161 | if (s->user) { |
71fda00f | 162 | LIST_REMOVE(sessions_by_user, s->user->sessions, s); |
20263082 LP |
163 | |
164 | if (s->user->display == s) | |
165 | s->user->display = NULL; | |
9afe9efb LP |
166 | |
167 | user_update_last_session_timer(s->user); | |
20263082 LP |
168 | } |
169 | ||
9418f147 LP |
170 | if (s->seat) { |
171 | if (s->seat->active == s) | |
172 | s->seat->active = NULL; | |
d7bd01b5 DH |
173 | if (s->seat->pending_switch == s) |
174 | s->seat->pending_switch = NULL; | |
9418f147 | 175 | |
49e6fdbf | 176 | seat_evict_position(s->seat, s); |
71fda00f | 177 | LIST_REMOVE(sessions_by_seat, s->seat->sessions, s); |
9418f147 | 178 | } |
20263082 | 179 | |
fb6becb4 LP |
180 | if (s->scope) { |
181 | hashmap_remove(s->manager->session_units, s->scope); | |
182 | free(s->scope); | |
183 | } | |
184 | ||
185 | free(s->scope_job); | |
1713813d | 186 | |
9d5b6901 | 187 | session_reset_leader(s, /* keep_fdstore = */ true); |
8494f562 | 188 | |
cc377381 | 189 | sd_bus_message_unref(s->create_message); |
20263082 LP |
190 | |
191 | free(s->tty); | |
192 | free(s->display); | |
193 | free(s->remote_host); | |
3f49d45a | 194 | free(s->remote_user); |
98a28fef | 195 | free(s->service); |
a4cd87e9 | 196 | free(s->desktop); |
20263082 LP |
197 | |
198 | hashmap_remove(s->manager->sessions, s->id); | |
98a28fef | 199 | |
c20b8dad LP |
200 | sd_event_source_unref(s->fifo_event_source); |
201 | safe_close(s->fifo_fd); | |
202 | ||
203 | /* Note that we remove neither the state file nor the fifo path here, since we want both to survive | |
204 | * daemon restarts */ | |
d2f92cdf | 205 | free(s->state_file); |
c20b8dad | 206 | free(s->fifo_path); |
8c29a457 | 207 | |
82325af3 MS |
208 | sd_event_source_unref(s->stop_on_idle_event_source); |
209 | ||
8c29a457 | 210 | return mfree(s); |
20263082 LP |
211 | } |
212 | ||
9444b1f2 LP |
213 | void session_set_user(Session *s, User *u) { |
214 | assert(s); | |
215 | assert(!s->user); | |
216 | ||
217 | s->user = u; | |
71fda00f | 218 | LIST_PREPEND(sessions_by_user, u->sessions, s); |
9afe9efb LP |
219 | |
220 | user_update_last_session_timer(u); | |
9444b1f2 LP |
221 | } |
222 | ||
76f2191d MS |
223 | int session_set_leader_consume(Session *s, PidRef _leader) { |
224 | _cleanup_(pidref_done) PidRef pidref = _leader; | |
238794b1 LP |
225 | int r; |
226 | ||
227 | assert(s); | |
76f2191d | 228 | assert(pidref_is_set(&pidref)); |
238794b1 | 229 | |
76f2191d | 230 | if (pidref_equal(&s->leader, &pidref)) |
238794b1 LP |
231 | return 0; |
232 | ||
9d5b6901 | 233 | session_reset_leader(s, /* keep_fdstore = */ false); |
8494f562 MY |
234 | |
235 | s->leader = TAKE_PIDREF(pidref); | |
236 | ||
0ae9073f MY |
237 | r = session_watch_pidfd(s); |
238 | if (r < 0) | |
239 | return log_error_errno(r, "Failed to watch leader pidfd for session '%s': %m", s->id); | |
240 | ||
8494f562 | 241 | r = hashmap_ensure_put(&s->manager->sessions_by_leader, &pidref_hash_ops, &s->leader, s); |
89bad70f LP |
242 | if (r < 0) |
243 | return r; | |
8494f562 | 244 | assert(r > 0); |
89bad70f | 245 | |
9d5b6901 MY |
246 | if (s->leader.fd >= 0) { |
247 | r = notify_push_fdf(s->leader.fd, "session-%s-leader-fd", s->id); | |
248 | if (r < 0) | |
249 | log_warning_errno(r, "Failed to push leader pidfd for session '%s', ignoring: %m", s->id); | |
250 | else | |
251 | s->leader_fd_saved = true; | |
252 | } | |
253 | ||
89bad70f | 254 | (void) audit_session_from_pid(s->leader.pid, &s->audit_id); |
238794b1 LP |
255 | |
256 | return 1; | |
257 | } | |
258 | ||
aed24c4c FB |
259 | static void session_save_devices(Session *s, FILE *f) { |
260 | SessionDevice *sd; | |
aed24c4c FB |
261 | |
262 | if (!hashmap_isempty(s->devices)) { | |
263 | fprintf(f, "DEVICES="); | |
90e74a66 | 264 | HASHMAP_FOREACH(sd, s->devices) |
67458536 | 265 | fprintf(f, DEVNUM_FORMAT_STR " ", DEVNUM_FORMAT_VAL(sd->dev)); |
aed24c4c FB |
266 | fprintf(f, "\n"); |
267 | } | |
268 | } | |
269 | ||
20263082 | 270 | int session_save(Session *s) { |
70f1280c | 271 | _cleanup_(unlink_and_freep) char *temp_path = NULL; |
cc377381 | 272 | _cleanup_fclose_ FILE *f = NULL; |
6d95e7d9 | 273 | int r; |
20263082 LP |
274 | |
275 | assert(s); | |
276 | ||
9444b1f2 LP |
277 | if (!s->user) |
278 | return -ESTALE; | |
279 | ||
accaeded LP |
280 | if (!s->started) |
281 | return 0; | |
282 | ||
37c1d5e9 | 283 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0, MKDIR_WARN_MODE); |
20263082 | 284 | if (r < 0) |
dacd6cee | 285 | goto fail; |
20263082 | 286 | |
14c3baca LP |
287 | r = fopen_temporary(s->state_file, &f, &temp_path); |
288 | if (r < 0) | |
dacd6cee | 289 | goto fail; |
20263082 | 290 | |
44176400 | 291 | (void) fchmod(fileno(f), 0644); |
14c3baca | 292 | |
20263082 LP |
293 | fprintf(f, |
294 | "# This is private data. Do not parse.\n" | |
90b2de37 | 295 | "UID="UID_FMT"\n" |
20263082 | 296 | "USER=%s\n" |
fdbb56dc MY |
297 | "ACTIVE=%s\n" |
298 | "IS_DISPLAY=%s\n" | |
0604381b | 299 | "STATE=%s\n" |
9d5b6901 MY |
300 | "REMOTE=%s\n" |
301 | "LEADER_FD_SAVED=%s\n", | |
22c902fa LP |
302 | s->user->user_record->uid, |
303 | s->user->user_record->user_name, | |
fdbb56dc MY |
304 | one_zero(session_is_active(s)), |
305 | one_zero(s->user->display == s), | |
0604381b | 306 | session_state_to_string(session_get_state(s)), |
9d5b6901 MY |
307 | one_zero(s->remote), |
308 | one_zero(s->leader_fd_saved)); | |
20263082 | 309 | |
a91e4e53 | 310 | if (s->type >= 0) |
507f22bd | 311 | fprintf(f, "TYPE=%s\n", session_type_to_string(s->type)); |
a91e4e53 | 312 | |
db72aea4 CH |
313 | if (s->original_type >= 0) |
314 | fprintf(f, "ORIGINAL_TYPE=%s\n", session_type_to_string(s->original_type)); | |
315 | ||
55efac6c | 316 | if (s->class >= 0) |
507f22bd | 317 | fprintf(f, "CLASS=%s\n", session_class_to_string(s->class)); |
55efac6c | 318 | |
fb6becb4 LP |
319 | if (s->scope) |
320 | fprintf(f, "SCOPE=%s\n", s->scope); | |
fb6becb4 LP |
321 | if (s->scope_job) |
322 | fprintf(f, "SCOPE_JOB=%s\n", s->scope_job); | |
20263082 | 323 | |
932e3ee7 | 324 | if (s->fifo_path) |
507f22bd | 325 | fprintf(f, "FIFO=%s\n", s->fifo_path); |
932e3ee7 | 326 | |
20263082 | 327 | if (s->seat) |
507f22bd | 328 | fprintf(f, "SEAT=%s\n", s->seat->id); |
20263082 LP |
329 | |
330 | if (s->tty) | |
507f22bd | 331 | fprintf(f, "TTY=%s\n", s->tty); |
20263082 | 332 | |
3d0ef5c7 LP |
333 | if (s->tty_validity >= 0) |
334 | fprintf(f, "TTY_VALIDITY=%s\n", tty_validity_to_string(s->tty_validity)); | |
335 | ||
20263082 | 336 | if (s->display) |
507f22bd | 337 | fprintf(f, "DISPLAY=%s\n", s->display); |
20263082 | 338 | |
558c6490 | 339 | if (s->remote_host) { |
c2b2df60 | 340 | _cleanup_free_ char *escaped = NULL; |
558c6490 LP |
341 | |
342 | escaped = cescape(s->remote_host); | |
343 | if (!escaped) { | |
344 | r = -ENOMEM; | |
dacd6cee | 345 | goto fail; |
558c6490 LP |
346 | } |
347 | ||
348 | fprintf(f, "REMOTE_HOST=%s\n", escaped); | |
349 | } | |
350 | ||
351 | if (s->remote_user) { | |
c2b2df60 | 352 | _cleanup_free_ char *escaped = NULL; |
558c6490 LP |
353 | |
354 | escaped = cescape(s->remote_user); | |
355 | if (!escaped) { | |
356 | r = -ENOMEM; | |
dacd6cee | 357 | goto fail; |
558c6490 LP |
358 | } |
359 | ||
360 | fprintf(f, "REMOTE_USER=%s\n", escaped); | |
361 | } | |
362 | ||
363 | if (s->service) { | |
c2b2df60 | 364 | _cleanup_free_ char *escaped = NULL; |
20263082 | 365 | |
558c6490 LP |
366 | escaped = cescape(s->service); |
367 | if (!escaped) { | |
368 | r = -ENOMEM; | |
dacd6cee | 369 | goto fail; |
558c6490 LP |
370 | } |
371 | ||
372 | fprintf(f, "SERVICE=%s\n", escaped); | |
373 | } | |
3f49d45a | 374 | |
558c6490 | 375 | if (s->desktop) { |
c2b2df60 | 376 | _cleanup_free_ char *escaped = NULL; |
98a28fef | 377 | |
558c6490 LP |
378 | escaped = cescape(s->desktop); |
379 | if (!escaped) { | |
380 | r = -ENOMEM; | |
dacd6cee | 381 | goto fail; |
558c6490 LP |
382 | } |
383 | ||
384 | fprintf(f, "DESKTOP=%s\n", escaped); | |
385 | } | |
a4cd87e9 | 386 | |
bf7825ae | 387 | if (s->seat && seat_has_vts(s->seat)) |
92bd5ff3 | 388 | fprintf(f, "VTNR=%u\n", s->vtnr); |
20263082 | 389 | |
49e6fdbf | 390 | if (!s->vtnr) |
e6494a07 | 391 | fprintf(f, "POSITION=%u\n", s->position); |
49e6fdbf | 392 | |
89bad70f LP |
393 | if (pidref_is_set(&s->leader)) |
394 | fprintf(f, "LEADER="PID_FMT"\n", s->leader.pid); | |
20263082 | 395 | |
3a87a86e | 396 | if (audit_session_is_valid(s->audit_id)) |
507f22bd | 397 | fprintf(f, "AUDIT=%"PRIu32"\n", s->audit_id); |
20263082 | 398 | |
9444b1f2 LP |
399 | if (dual_timestamp_is_set(&s->timestamp)) |
400 | fprintf(f, | |
90b2de37 ZJS |
401 | "REALTIME="USEC_FMT"\n" |
402 | "MONOTONIC="USEC_FMT"\n", | |
403 | s->timestamp.realtime, | |
404 | s->timestamp.monotonic); | |
9444b1f2 | 405 | |
aed24c4c | 406 | if (s->controller) { |
6d33772f | 407 | fprintf(f, "CONTROLLER=%s\n", s->controller); |
aed24c4c FB |
408 | session_save_devices(s, f); |
409 | } | |
6d33772f | 410 | |
dacd6cee LP |
411 | r = fflush_and_check(f); |
412 | if (r < 0) | |
413 | goto fail; | |
14c3baca | 414 | |
dacd6cee | 415 | if (rename(temp_path, s->state_file) < 0) { |
20263082 | 416 | r = -errno; |
dacd6cee | 417 | goto fail; |
20263082 LP |
418 | } |
419 | ||
70f1280c | 420 | temp_path = mfree(temp_path); |
dacd6cee LP |
421 | return 0; |
422 | ||
423 | fail: | |
424 | (void) unlink(s->state_file); | |
14c3baca | 425 | |
dacd6cee | 426 | return log_error_errno(r, "Failed to save session data %s: %m", s->state_file); |
20263082 LP |
427 | } |
428 | ||
aed24c4c | 429 | static int session_load_devices(Session *s, const char *devices) { |
aed24c4c FB |
430 | int r = 0; |
431 | ||
432 | assert(s); | |
433 | ||
e5c09aad | 434 | for (const char *p = devices;;) { |
aed24c4c | 435 | _cleanup_free_ char *word = NULL; |
aed24c4c FB |
436 | dev_t dev; |
437 | int k; | |
438 | ||
439 | k = extract_first_word(&p, &word, NULL, 0); | |
41935c0c MY |
440 | if (k <= 0) { |
441 | RET_GATHER(r, k); | |
aed24c4c FB |
442 | break; |
443 | } | |
444 | ||
7176f06c | 445 | k = parse_devnum(word, &dev); |
aed24c4c | 446 | if (k < 0) { |
41935c0c | 447 | RET_GATHER(r, k); |
aed24c4c FB |
448 | continue; |
449 | } | |
450 | ||
451 | /* The file descriptors for loaded devices will be reattached later. */ | |
41935c0c | 452 | RET_GATHER(r, session_device_new(s, dev, /* open_device = */ false, /* ret = */ NULL)); |
aed24c4c FB |
453 | } |
454 | ||
455 | if (r < 0) | |
41935c0c | 456 | log_error_errno(r, "Failed to load some session devices for session '%s': %m", s->id); |
aed24c4c FB |
457 | return r; |
458 | } | |
dacd6cee | 459 | |
20263082 | 460 | int session_load(Session *s) { |
9444b1f2 | 461 | _cleanup_free_ char *remote = NULL, |
a185c5aa | 462 | *seat = NULL, |
3d0ef5c7 | 463 | *tty_validity = NULL, |
a185c5aa | 464 | *vtnr = NULL, |
be94d954 | 465 | *state = NULL, |
e6494a07 | 466 | *position = NULL, |
9d5b6901 MY |
467 | *leader_pid = NULL, |
468 | *leader_fd_saved = NULL, | |
55efac6c | 469 | *type = NULL, |
db72aea4 | 470 | *original_type = NULL, |
9444b1f2 LP |
471 | *class = NULL, |
472 | *uid = NULL, | |
473 | *realtime = NULL, | |
6d33772f | 474 | *monotonic = NULL, |
aed24c4c FB |
475 | *controller = NULL, |
476 | *active = NULL, | |
1c8280fd LP |
477 | *devices = NULL, |
478 | *is_display = NULL; | |
a185c5aa LP |
479 | |
480 | int k, r; | |
481 | ||
20263082 LP |
482 | assert(s); |
483 | ||
aa8fbc74 | 484 | r = parse_env_file(NULL, s->state_file, |
9d5b6901 MY |
485 | "REMOTE", &remote, |
486 | "SCOPE", &s->scope, | |
487 | "SCOPE_JOB", &s->scope_job, | |
488 | "FIFO", &s->fifo_path, | |
489 | "SEAT", &seat, | |
490 | "TTY", &s->tty, | |
491 | "TTY_VALIDITY", &tty_validity, | |
492 | "DISPLAY", &s->display, | |
493 | "REMOTE_HOST", &s->remote_host, | |
494 | "REMOTE_USER", &s->remote_user, | |
495 | "SERVICE", &s->service, | |
496 | "DESKTOP", &s->desktop, | |
497 | "VTNR", &vtnr, | |
498 | "STATE", &state, | |
499 | "POSITION", &position, | |
500 | "LEADER", &leader_pid, | |
501 | "LEADER_FD_SAVED", &leader_fd_saved, | |
502 | "TYPE", &type, | |
503 | "ORIGINAL_TYPE", &original_type, | |
504 | "CLASS", &class, | |
505 | "UID", &uid, | |
506 | "REALTIME", &realtime, | |
507 | "MONOTONIC", &monotonic, | |
508 | "CONTROLLER", &controller, | |
509 | "ACTIVE", &active, | |
510 | "DEVICES", &devices, | |
511 | "IS_DISPLAY", &is_display); | |
f647962d MS |
512 | if (r < 0) |
513 | return log_error_errno(r, "Failed to read %s: %m", s->state_file); | |
9444b1f2 LP |
514 | |
515 | if (!s->user) { | |
516 | uid_t u; | |
517 | User *user; | |
518 | ||
baaa35ad ZJS |
519 | if (!uid) |
520 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), | |
521 | "UID not specified for session %s", | |
522 | s->id); | |
9444b1f2 LP |
523 | |
524 | r = parse_uid(uid, &u); | |
525 | if (r < 0) { | |
526 | log_error("Failed to parse UID value %s for session %s.", uid, s->id); | |
527 | return r; | |
528 | } | |
529 | ||
8cb4ab00 | 530 | user = hashmap_get(s->manager->users, UID_TO_PTR(u)); |
baaa35ad ZJS |
531 | if (!user) |
532 | return log_error_errno(SYNTHETIC_ERRNO(ENOENT), | |
533 | "User of session %s not known.", | |
534 | s->id); | |
9444b1f2 LP |
535 | |
536 | session_set_user(s, user); | |
537 | } | |
a185c5aa LP |
538 | |
539 | if (remote) { | |
540 | k = parse_boolean(remote); | |
541 | if (k >= 0) | |
542 | s->remote = k; | |
543 | } | |
544 | ||
c506027a DH |
545 | if (vtnr) |
546 | safe_atou(vtnr, &s->vtnr); | |
547 | ||
9418f147 | 548 | if (seat && !s->seat) { |
a185c5aa LP |
549 | Seat *o; |
550 | ||
551 | o = hashmap_get(s->manager->seats, seat); | |
552 | if (o) | |
c506027a DH |
553 | r = seat_attach_session(o, s); |
554 | if (!o || r < 0) | |
555 | log_error("Cannot attach session %s to seat %s", s->id, seat); | |
a185c5aa LP |
556 | } |
557 | ||
c506027a DH |
558 | if (!s->seat || !seat_has_vts(s->seat)) |
559 | s->vtnr = 0; | |
a185c5aa | 560 | |
e6494a07 | 561 | if (position && s->seat) { |
14cb109d | 562 | unsigned npos; |
49e6fdbf | 563 | |
e6494a07 | 564 | safe_atou(position, &npos); |
49e6fdbf DH |
565 | seat_claim_position(s->seat, s, npos); |
566 | } | |
567 | ||
3d0ef5c7 LP |
568 | if (tty_validity) { |
569 | TTYValidity v; | |
570 | ||
571 | v = tty_validity_from_string(tty_validity); | |
572 | if (v < 0) | |
573 | log_debug("Failed to parse TTY validity: %s", tty_validity); | |
574 | else | |
575 | s->tty_validity = v; | |
576 | } | |
577 | ||
a91e4e53 LP |
578 | if (type) { |
579 | SessionType t; | |
580 | ||
581 | t = session_type_from_string(type); | |
582 | if (t >= 0) | |
583 | s->type = t; | |
584 | } | |
585 | ||
db72aea4 CH |
586 | if (original_type) { |
587 | SessionType ot; | |
588 | ||
589 | ot = session_type_from_string(original_type); | |
590 | if (ot >= 0) | |
591 | s->original_type = ot; | |
592 | } else | |
593 | /* Pre-v246 compat: initialize original_type if not set in the state file */ | |
594 | s->original_type = s->type; | |
595 | ||
55efac6c LP |
596 | if (class) { |
597 | SessionClass c; | |
598 | ||
599 | c = session_class_from_string(class); | |
600 | if (c >= 0) | |
601 | s->class = c; | |
602 | } | |
603 | ||
e5c09aad | 604 | if (streq_ptr(state, "closing")) |
be94d954 MP |
605 | s->stopping = true; |
606 | ||
b4f78aea LP |
607 | if (s->fifo_path) { |
608 | int fd; | |
609 | ||
610 | /* If we open an unopened pipe for reading we will not | |
611 | get an EOF. to trigger an EOF we hence open it for | |
be94d954 MP |
612 | writing, but close it right away which then will |
613 | trigger the EOF. This will happen immediately if no | |
614 | other process has the FIFO open for writing, i. e. | |
615 | when the session died before logind (re)started. */ | |
b4f78aea LP |
616 | |
617 | fd = session_create_fifo(s); | |
03e334a1 | 618 | safe_close(fd); |
b4f78aea LP |
619 | } |
620 | ||
b895a735 | 621 | if (realtime) |
d68c645b | 622 | (void) deserialize_usec(realtime, &s->timestamp.realtime); |
b895a735 | 623 | if (monotonic) |
d68c645b | 624 | (void) deserialize_usec(monotonic, &s->timestamp.monotonic); |
a185c5aa | 625 | |
aed24c4c FB |
626 | if (active) { |
627 | k = parse_boolean(active); | |
628 | if (k >= 0) | |
629 | s->was_active = k; | |
630 | } | |
631 | ||
1c8280fd LP |
632 | if (is_display) { |
633 | /* Note that when enumerating users are loaded before sessions, hence the display session to use is | |
634 | * something we have to store along with the session and not the user, as in that case we couldn't | |
635 | * apply it at the time we load the user. */ | |
636 | ||
637 | k = parse_boolean(is_display); | |
638 | if (k < 0) | |
639 | log_warning_errno(k, "Failed to parse IS_DISPLAY session property: %m"); | |
640 | else if (k > 0) | |
641 | s->user->display = s; | |
642 | } | |
643 | ||
6d33772f | 644 | if (controller) { |
aed24c4c | 645 | if (bus_name_has_owner(s->manager->bus, controller, NULL) > 0) { |
dc6284e9 | 646 | session_set_controller(s, controller, false, false); |
aed24c4c FB |
647 | session_load_devices(s, devices); |
648 | } else | |
90a18413 | 649 | session_restore_vt(s); |
6d33772f DH |
650 | } |
651 | ||
9d5b6901 MY |
652 | if (leader_pid) { |
653 | assert(!pidref_is_set(&s->leader)); | |
654 | ||
655 | r = parse_pid(leader_pid, &s->deserialized_pid); | |
656 | if (r < 0) | |
657 | return log_error_errno(r, "Failed to parse LEADER=%s: %m", leader_pid); | |
658 | ||
659 | if (leader_fd_saved) { | |
660 | r = parse_boolean(leader_fd_saved); | |
661 | if (r < 0) | |
662 | return log_error_errno(r, "Failed to parse LEADER_FD_SAVED=%s: %m", leader_fd_saved); | |
663 | s->leader_fd_saved = r > 0; | |
664 | ||
665 | if (s->leader_fd_saved) | |
666 | /* The leader fd will be acquired from fdstore later */ | |
667 | return 0; | |
668 | } | |
669 | ||
670 | _cleanup_(pidref_done) PidRef p = PIDREF_NULL; | |
671 | ||
672 | r = pidref_set_pid(&p, s->deserialized_pid); | |
673 | if (r >= 0) | |
674 | r = session_set_leader_consume(s, TAKE_PIDREF(p)); | |
675 | if (r < 0) | |
676 | log_warning_errno(r, "Failed to set leader PID for session '%s': %m", s->id); | |
677 | } | |
678 | ||
a185c5aa | 679 | return r; |
20263082 LP |
680 | } |
681 | ||
682 | int session_activate(Session *s) { | |
14cb109d | 683 | unsigned num_pending; |
d7bd01b5 | 684 | |
20263082 | 685 | assert(s); |
9444b1f2 | 686 | assert(s->user); |
20263082 | 687 | |
20263082 | 688 | if (!s->seat) |
15411c0c | 689 | return -EOPNOTSUPP; |
20263082 LP |
690 | |
691 | if (s->seat->active == s) | |
692 | return 0; | |
693 | ||
d7bd01b5 DH |
694 | /* on seats with VTs, we let VTs manage session-switching */ |
695 | if (seat_has_vts(s->seat)) { | |
709d0587 | 696 | if (s->vtnr == 0) |
15411c0c | 697 | return -EOPNOTSUPP; |
d7bd01b5 DH |
698 | |
699 | return chvt(s->vtnr); | |
700 | } | |
701 | ||
702 | /* On seats without VTs, we implement session-switching in logind. We | |
703 | * try to pause all session-devices and wait until the session | |
704 | * controller acknowledged them. Once all devices are asleep, we simply | |
705 | * switch the active session and be done. | |
706 | * We save the session we want to switch to in seat->pending_switch and | |
707 | * seat_complete_switch() will perform the final switch. */ | |
708 | ||
709 | s->seat->pending_switch = s; | |
710 | ||
711 | /* if no devices are running, immediately perform the session switch */ | |
712 | num_pending = session_device_try_pause_all(s); | |
713 | if (!num_pending) | |
714 | seat_complete_switch(s->seat); | |
20263082 | 715 | |
d7bd01b5 | 716 | return 0; |
20263082 LP |
717 | } |
718 | ||
25a1ab4e | 719 | static int session_start_scope(Session *s, sd_bus_message *properties, sd_bus_error *error) { |
98a28fef LP |
720 | int r; |
721 | ||
722 | assert(s); | |
9444b1f2 | 723 | assert(s->user); |
98a28fef | 724 | |
fb6becb4 | 725 | if (!s->scope) { |
278e815b | 726 | _cleanup_strv_free_ char **after = NULL; |
fb2367ed | 727 | _cleanup_free_ char *scope = NULL; |
90558f31 | 728 | const char *description; |
405e0255 | 729 | |
25a1ab4e LP |
730 | s->scope_job = mfree(s->scope_job); |
731 | ||
605405c6 | 732 | scope = strjoin("session-", s->id, ".scope"); |
d0af76e6 | 733 | if (!scope) |
ae018d9b LP |
734 | return log_oom(); |
735 | ||
0a59216c | 736 | description = strjoina("Session ", s->id, " of User ", s->user->user_record->user_name); |
90558f31 | 737 | |
278e815b FB |
738 | /* We usually want to order session scopes after systemd-user-sessions.service since the |
739 | * latter unit is used as login session barrier for unprivileged users. However the barrier | |
740 | * doesn't apply for root as sysadmin should always be able to log in (and without waiting | |
741 | * for any timeout to expire) in case something goes wrong during the boot process. Since | |
742 | * ordering after systemd-user-sessions.service and the user instance is optional we make use | |
743 | * of STRV_IGNORE with strv_new() to skip these order constraints when needed. */ | |
744 | after = strv_new("systemd-logind.service", | |
745 | s->user->runtime_dir_service, | |
746 | !uid_is_system(s->user->user_record->uid) ? "systemd-user-sessions.service" : STRV_IGNORE, | |
513cf7da | 747 | s->user->service); |
278e815b FB |
748 | if (!after) |
749 | return log_oom(); | |
750 | ||
90558f31 LP |
751 | r = manager_start_scope( |
752 | s->manager, | |
753 | scope, | |
7eda208f | 754 | &s->leader, |
90558f31 LP |
755 | s->user->slice, |
756 | description, | |
124d7cb2 ZJS |
757 | /* These two have StopWhenUnneeded= set, hence add a dep towards them */ |
758 | STRV_MAKE(s->user->runtime_dir_service, | |
513cf7da | 759 | s->user->service), |
278e815b | 760 | after, |
22c902fa | 761 | user_record_home_directory(s->user->user_record), |
22f93314 | 762 | properties, |
25a1ab4e LP |
763 | error, |
764 | &s->scope_job); | |
fb2367ed | 765 | if (r < 0) |
124d7cb2 ZJS |
766 | return log_error_errno(r, "Failed to start session scope %s: %s", |
767 | scope, bus_error_message(error, r)); | |
fb2367ed YW |
768 | |
769 | s->scope = TAKE_PTR(scope); | |
20263082 LP |
770 | } |
771 | ||
124d7cb2 | 772 | (void) hashmap_put(s->manager->session_units, s->scope, s); |
d0af76e6 | 773 | |
20263082 LP |
774 | return 0; |
775 | } | |
776 | ||
82325af3 MS |
777 | static int session_dispatch_stop_on_idle(sd_event_source *source, uint64_t t, void *userdata) { |
778 | Session *s = userdata; | |
779 | dual_timestamp ts; | |
780 | int r, idle; | |
781 | ||
782 | assert(s); | |
783 | ||
784 | if (s->stopping) | |
785 | return 0; | |
786 | ||
787 | idle = session_get_idle_hint(s, &ts); | |
788 | if (idle) { | |
6269ffe7 | 789 | log_info("Session \"%s\" of user \"%s\" is idle, stopping.", s->id, s->user->user_record->user_name); |
82325af3 MS |
790 | |
791 | return session_stop(s, /* force */ true); | |
792 | } | |
793 | ||
ab7ae746 MS |
794 | r = sd_event_source_set_time( |
795 | source, | |
796 | usec_add(dual_timestamp_is_set(&ts) ? ts.monotonic : now(CLOCK_MONOTONIC), | |
797 | s->manager->stop_idle_session_usec)); | |
82325af3 MS |
798 | if (r < 0) |
799 | return log_error_errno(r, "Failed to configure stop on idle session event source: %m"); | |
800 | ||
801 | r = sd_event_source_set_enabled(source, SD_EVENT_ONESHOT); | |
802 | if (r < 0) | |
803 | return log_error_errno(r, "Failed to enable stop on idle session event source: %m"); | |
804 | ||
805 | return 1; | |
806 | } | |
807 | ||
808 | static int session_setup_stop_on_idle_timer(Session *s) { | |
809 | int r; | |
810 | ||
811 | assert(s); | |
812 | ||
508b4786 | 813 | if (s->manager->stop_idle_session_usec == USEC_INFINITY || IN_SET(s->class, SESSION_GREETER, SESSION_LOCK_SCREEN)) |
82325af3 MS |
814 | return 0; |
815 | ||
816 | r = sd_event_add_time_relative( | |
817 | s->manager->event, | |
818 | &s->stop_on_idle_event_source, | |
819 | CLOCK_MONOTONIC, | |
820 | s->manager->stop_idle_session_usec, | |
821 | 0, | |
822 | session_dispatch_stop_on_idle, s); | |
823 | if (r < 0) | |
824 | return log_error_errno(r, "Failed to add stop on idle session event source: %m"); | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
25a1ab4e | 829 | int session_start(Session *s, sd_bus_message *properties, sd_bus_error *error) { |
20263082 LP |
830 | int r; |
831 | ||
832 | assert(s); | |
9444b1f2 LP |
833 | |
834 | if (!s->user) | |
835 | return -ESTALE; | |
20263082 | 836 | |
25a1ab4e LP |
837 | if (s->stopping) |
838 | return -EINVAL; | |
839 | ||
9418f147 LP |
840 | if (s->started) |
841 | return 0; | |
842 | ||
513cf7da | 843 | r = user_start(s->user); |
ed18b08b LP |
844 | if (r < 0) |
845 | return r; | |
846 | ||
25a1ab4e | 847 | r = session_start_scope(s, properties, error); |
fb6becb4 LP |
848 | if (r < 0) |
849 | return r; | |
850 | ||
82325af3 MS |
851 | r = session_setup_stop_on_idle_timer(s); |
852 | if (r < 0) | |
853 | return r; | |
854 | ||
d9eb81f9 | 855 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
2b044526 | 856 | "MESSAGE_ID=" SD_MESSAGE_SESSION_START_STR, |
877d54e9 | 857 | "SESSION_ID=%s", s->id, |
22c902fa | 858 | "USER_ID=%s", s->user->user_record->user_name, |
89bad70f | 859 | "LEADER="PID_FMT, s->leader.pid, |
22c902fa | 860 | LOG_MESSAGE("New session %s of user %s.", s->id, s->user->user_record->user_name)); |
98a28fef | 861 | |
9444b1f2 | 862 | if (!dual_timestamp_is_set(&s->timestamp)) |
fa5a0251 | 863 | dual_timestamp_now(&s->timestamp); |
14c3baca | 864 | |
e9816c48 LP |
865 | if (s->seat) |
866 | seat_read_active_vt(s->seat); | |
867 | ||
9418f147 LP |
868 | s->started = true; |
869 | ||
952d3260 LP |
870 | user_elect_display(s->user); |
871 | ||
5f41d1f1 | 872 | /* Save data */ |
5157b0d8 LP |
873 | (void) session_save(s); |
874 | (void) user_save(s->user); | |
5f41d1f1 | 875 | if (s->seat) |
5157b0d8 | 876 | (void) seat_save(s->seat); |
e9816c48 | 877 | |
5f41d1f1 | 878 | /* Send signals */ |
da119395 | 879 | session_send_signal(s, true); |
7d049e30 | 880 | user_send_changed(s->user, "Display", NULL); |
40771cf5 LP |
881 | |
882 | if (s->seat && s->seat->active == s) | |
5157b0d8 | 883 | (void) seat_send_changed(s->seat, "ActiveSession", NULL); |
9418f147 | 884 | |
20263082 LP |
885 | return 0; |
886 | } | |
887 | ||
9bb69af4 | 888 | static int session_stop_scope(Session *s, bool force) { |
4afd3348 | 889 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
20263082 | 890 | int r; |
20263082 LP |
891 | |
892 | assert(s); | |
893 | ||
fb6becb4 LP |
894 | if (!s->scope) |
895 | return 0; | |
9b221b63 | 896 | |
756ed0e2 | 897 | /* Let's always abandon the scope first. This tells systemd that we are not interested anymore, and everything |
629ff674 | 898 | * that is left in the scope is "left-over". Informing systemd about this has the benefit that it will log |
756ed0e2 LP |
899 | * when killing any processes left after this point. */ |
900 | r = manager_abandon_scope(s->manager, s->scope, &error); | |
25a1ab4e | 901 | if (r < 0) { |
756ed0e2 | 902 | log_warning_errno(r, "Failed to abandon session scope, ignoring: %s", bus_error_message(&error, r)); |
25a1ab4e LP |
903 | sd_bus_error_free(&error); |
904 | } | |
905 | ||
906 | s->scope_job = mfree(s->scope_job); | |
756ed0e2 LP |
907 | |
908 | /* Optionally, let's kill everything that's left now. */ | |
156a3637 LP |
909 | if (force || |
910 | (s->user->user_record->kill_processes != 0 && | |
911 | (s->user->user_record->kill_processes > 0 || | |
912 | manager_shall_kill(s->manager, s->user->user_record->user_name)))) { | |
801a884d | 913 | |
1a42ce09 | 914 | r = manager_stop_unit(s->manager, s->scope, force ? "replace" : "fail", &error, &s->scope_job); |
25a1ab4e LP |
915 | if (r < 0) { |
916 | if (force) | |
917 | return log_error_errno(r, "Failed to stop session scope: %s", bus_error_message(&error, r)); | |
20263082 | 918 | |
25a1ab4e LP |
919 | log_warning_errno(r, "Failed to stop session scope, ignoring: %s", bus_error_message(&error, r)); |
920 | } | |
8150acb1 | 921 | } else { |
20263082 | 922 | |
8150acb1 AJ |
923 | /* With no killing, this session is allowed to persist in "closing" state indefinitely. |
924 | * Therefore session stop and session removal may be two distinct events. | |
925 | * Session stop is quite significant on its own, let's log it. */ | |
926 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, | |
927 | "SESSION_ID=%s", s->id, | |
22c902fa | 928 | "USER_ID=%s", s->user->user_record->user_name, |
89bad70f | 929 | "LEADER="PID_FMT, s->leader.pid, |
f4cf1d66 | 930 | LOG_MESSAGE("Session %s logged out. Waiting for processes to exit.", s->id)); |
8150acb1 AJ |
931 | } |
932 | ||
9b221b63 | 933 | return 0; |
20263082 LP |
934 | } |
935 | ||
9bb69af4 | 936 | int session_stop(Session *s, bool force) { |
405e0255 LP |
937 | int r; |
938 | ||
939 | assert(s); | |
940 | ||
25a1ab4e LP |
941 | /* This is called whenever we begin with tearing down a session record. It's called in four cases: explicit API |
942 | * request via the bus (either directly for the session object or for the seat or user object this session | |
943 | * belongs to; 'force' is true), or due to automatic GC (i.e. scope vanished; 'force' is false), or because the | |
944 | * session FIFO saw an EOF ('force' is false), or because the release timer hit ('force' is false). */ | |
945 | ||
405e0255 LP |
946 | if (!s->user) |
947 | return -ESTALE; | |
25a1ab4e LP |
948 | if (!s->started) |
949 | return 0; | |
950 | if (s->stopping) | |
951 | return 0; | |
405e0255 | 952 | |
5f41d1f1 | 953 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
76f2191d | 954 | s->leader_pidfd_event_source = sd_event_source_unref(s->leader_pidfd_event_source); |
5f41d1f1 | 955 | |
10189fd6 DH |
956 | if (s->seat) |
957 | seat_evict_position(s->seat, s); | |
958 | ||
5f41d1f1 LP |
959 | /* We are going down, don't care about FIFOs anymore */ |
960 | session_remove_fifo(s); | |
961 | ||
405e0255 | 962 | /* Kill cgroup */ |
9bb69af4 | 963 | r = session_stop_scope(s, force); |
405e0255 | 964 | |
5f41d1f1 LP |
965 | s->stopping = true; |
966 | ||
952d3260 LP |
967 | user_elect_display(s->user); |
968 | ||
5157b0d8 LP |
969 | (void) session_save(s); |
970 | (void) user_save(s->user); | |
405e0255 LP |
971 | |
972 | return r; | |
973 | } | |
974 | ||
975 | int session_finalize(Session *s) { | |
118ecf32 | 976 | SessionDevice *sd; |
20263082 LP |
977 | |
978 | assert(s); | |
979 | ||
9444b1f2 LP |
980 | if (!s->user) |
981 | return -ESTALE; | |
982 | ||
ed18b08b | 983 | if (s->started) |
d9eb81f9 | 984 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
2b044526 | 985 | "MESSAGE_ID=" SD_MESSAGE_SESSION_STOP_STR, |
877d54e9 | 986 | "SESSION_ID=%s", s->id, |
22c902fa | 987 | "USER_ID=%s", s->user->user_record->user_name, |
89bad70f | 988 | "LEADER="PID_FMT, s->leader.pid, |
a1230ff9 | 989 | LOG_MESSAGE("Removed session %s.", s->id)); |
98a28fef | 990 | |
5f41d1f1 LP |
991 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
992 | ||
10189fd6 DH |
993 | if (s->seat) |
994 | seat_evict_position(s->seat, s); | |
995 | ||
118ecf32 DH |
996 | /* Kill session devices */ |
997 | while ((sd = hashmap_first(s->devices))) | |
998 | session_device_free(sd); | |
999 | ||
491ac9f2 | 1000 | (void) unlink(s->state_file); |
d2f92cdf | 1001 | session_add_to_gc_queue(s); |
ed18b08b | 1002 | user_add_to_gc_queue(s->user); |
14c3baca | 1003 | |
405e0255 | 1004 | if (s->started) { |
ed18b08b | 1005 | session_send_signal(s, false); |
405e0255 LP |
1006 | s->started = false; |
1007 | } | |
50fb9793 | 1008 | |
9418f147 LP |
1009 | if (s->seat) { |
1010 | if (s->seat->active == s) | |
1011 | seat_set_active(s->seat, NULL); | |
1012 | ||
23bd3b62 | 1013 | seat_save(s->seat); |
9418f147 LP |
1014 | } |
1015 | ||
9d5b6901 | 1016 | session_reset_leader(s, /* keep_fdstore = */ false); |
76f2191d | 1017 | |
5157b0d8 LP |
1018 | (void) user_save(s->user); |
1019 | (void) user_send_changed(s->user, "Display", NULL); | |
9418f147 | 1020 | |
491ac9f2 | 1021 | return 0; |
20263082 LP |
1022 | } |
1023 | ||
5f41d1f1 | 1024 | static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { |
99534007 | 1025 | Session *s = ASSERT_PTR(userdata); |
5f41d1f1 LP |
1026 | |
1027 | assert(es); | |
5f41d1f1 | 1028 | |
bda62573 | 1029 | session_stop(s, /* force = */ false); |
5f41d1f1 LP |
1030 | return 0; |
1031 | } | |
1032 | ||
ad8780c9 | 1033 | int session_release(Session *s) { |
5f41d1f1 LP |
1034 | assert(s); |
1035 | ||
1036 | if (!s->started || s->stopping) | |
ad8780c9 ZJS |
1037 | return 0; |
1038 | ||
1039 | if (s->timer_event_source) | |
1040 | return 0; | |
1041 | ||
39cf0351 LP |
1042 | return sd_event_add_time_relative( |
1043 | s->manager->event, | |
1044 | &s->timer_event_source, | |
1045 | CLOCK_MONOTONIC, | |
1046 | RELEASE_USEC, 0, | |
1047 | release_timeout_callback, s); | |
5f41d1f1 LP |
1048 | } |
1049 | ||
20263082 LP |
1050 | bool session_is_active(Session *s) { |
1051 | assert(s); | |
1052 | ||
1053 | if (!s->seat) | |
1054 | return true; | |
1055 | ||
1056 | return s->seat->active == s; | |
1057 | } | |
1058 | ||
23406ce5 LP |
1059 | static int get_tty_atime(const char *tty, usec_t *atime) { |
1060 | _cleanup_free_ char *p = NULL; | |
a185c5aa | 1061 | struct stat st; |
23406ce5 LP |
1062 | |
1063 | assert(tty); | |
1064 | assert(atime); | |
1065 | ||
1066 | if (!path_is_absolute(tty)) { | |
b910cc72 | 1067 | p = path_join("/dev", tty); |
23406ce5 LP |
1068 | if (!p) |
1069 | return -ENOMEM; | |
1070 | ||
1071 | tty = p; | |
1072 | } else if (!path_startswith(tty, "/dev/")) | |
1073 | return -ENOENT; | |
1074 | ||
1075 | if (lstat(tty, &st) < 0) | |
1076 | return -errno; | |
1077 | ||
1078 | *atime = timespec_load(&st.st_atim); | |
1079 | return 0; | |
1080 | } | |
1081 | ||
1082 | static int get_process_ctty_atime(pid_t pid, usec_t *atime) { | |
1083 | _cleanup_free_ char *p = NULL; | |
1084 | int r; | |
1085 | ||
1086 | assert(pid > 0); | |
1087 | assert(atime); | |
1088 | ||
1089 | r = get_ctty(pid, NULL, &p); | |
1090 | if (r < 0) | |
1091 | return r; | |
1092 | ||
1093 | return get_tty_atime(p, atime); | |
1094 | } | |
1095 | ||
1096 | int session_get_idle_hint(Session *s, dual_timestamp *t) { | |
82325af3 | 1097 | usec_t atime = 0, dtime = 0; |
23406ce5 | 1098 | int r; |
a185c5aa LP |
1099 | |
1100 | assert(s); | |
1101 | ||
be2bb14f LP |
1102 | /* Graphical sessions have an explicit idle hint */ |
1103 | if (SESSION_TYPE_IS_GRAPHICAL(s->type)) { | |
a185c5aa LP |
1104 | if (t) |
1105 | *t = s->idle_hint_timestamp; | |
1106 | ||
1107 | return s->idle_hint; | |
1108 | } | |
1109 | ||
20604ff2 LP |
1110 | if (s->type == SESSION_TTY) { |
1111 | /* For sessions with an explicitly configured tty, let's check its atime */ | |
1112 | if (s->tty) { | |
1113 | r = get_tty_atime(s->tty, &atime); | |
1114 | if (r >= 0) | |
1115 | goto found_atime; | |
1116 | } | |
a185c5aa | 1117 | |
20604ff2 LP |
1118 | /* For sessions with a leader but no explicitly configured tty, let's check the controlling tty of |
1119 | * the leader */ | |
1120 | if (pidref_is_set(&s->leader)) { | |
1121 | r = get_process_ctty_atime(s->leader.pid, &atime); | |
1122 | if (r >= 0) | |
1123 | goto found_atime; | |
1124 | } | |
a185c5aa LP |
1125 | } |
1126 | ||
a185c5aa | 1127 | if (t) |
be2bb14f | 1128 | *t = DUAL_TIMESTAMP_NULL; |
a185c5aa | 1129 | |
be2bb14f | 1130 | return false; |
23406ce5 LP |
1131 | |
1132 | found_atime: | |
1133 | if (t) | |
1134 | dual_timestamp_from_realtime(t, atime); | |
1135 | ||
82325af3 MS |
1136 | if (s->manager->idle_action_usec > 0 && s->manager->stop_idle_session_usec != USEC_INFINITY) |
1137 | dtime = MIN(s->manager->idle_action_usec, s->manager->stop_idle_session_usec); | |
1138 | else if (s->manager->idle_action_usec > 0) | |
1139 | dtime = s->manager->idle_action_usec; | |
1140 | else if (s->manager->stop_idle_session_usec != USEC_INFINITY) | |
1141 | dtime = s->manager->stop_idle_session_usec; | |
1142 | else | |
be2bb14f | 1143 | return false; |
23406ce5 | 1144 | |
82325af3 | 1145 | return usec_add(atime, dtime) <= now(CLOCK_REALTIME); |
a185c5aa LP |
1146 | } |
1147 | ||
be2bb14f | 1148 | int session_set_idle_hint(Session *s, bool b) { |
bef422ae LP |
1149 | assert(s); |
1150 | ||
be2bb14f LP |
1151 | if (!SESSION_TYPE_IS_GRAPHICAL(s->type)) |
1152 | return -ENOTTY; | |
1153 | ||
bef422ae | 1154 | if (s->idle_hint == b) |
be2bb14f | 1155 | return 0; |
bef422ae LP |
1156 | |
1157 | s->idle_hint = b; | |
fa5a0251 | 1158 | dual_timestamp_now(&s->idle_hint_timestamp); |
9418f147 | 1159 | |
cc377381 | 1160 | session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
9418f147 LP |
1161 | |
1162 | if (s->seat) | |
cc377381 LP |
1163 | seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
1164 | ||
1165 | user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
1166 | manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
be2bb14f LP |
1167 | |
1168 | return 1; | |
cc377381 LP |
1169 | } |
1170 | ||
42d35e13 VT |
1171 | int session_get_locked_hint(Session *s) { |
1172 | assert(s); | |
1173 | ||
1174 | return s->locked_hint; | |
1175 | } | |
1176 | ||
1177 | void session_set_locked_hint(Session *s, bool b) { | |
1178 | assert(s); | |
1179 | ||
1180 | if (s->locked_hint == b) | |
1181 | return; | |
1182 | ||
1183 | s->locked_hint = b; | |
1184 | ||
1185 | session_send_changed(s, "LockedHint", NULL); | |
1186 | } | |
1187 | ||
db72aea4 CH |
1188 | void session_set_type(Session *s, SessionType t) { |
1189 | assert(s); | |
1190 | ||
1191 | if (s->type == t) | |
1192 | return; | |
1193 | ||
1194 | s->type = t; | |
5157b0d8 LP |
1195 | (void) session_save(s); |
1196 | (void) session_send_changed(s, "Type", NULL); | |
db72aea4 CH |
1197 | } |
1198 | ||
4885d749 DT |
1199 | int session_set_display(Session *s, const char *display) { |
1200 | int r; | |
1201 | ||
1202 | assert(s); | |
1203 | assert(display); | |
1204 | ||
4885d749 | 1205 | r = free_and_strdup(&s->display, display); |
e5c09aad | 1206 | if (r <= 0) /* 0 means the strings were equal */ |
4885d749 DT |
1207 | return r; |
1208 | ||
5157b0d8 LP |
1209 | (void) session_save(s); |
1210 | (void) session_send_changed(s, "Display", NULL); | |
4885d749 DT |
1211 | |
1212 | return 1; | |
1213 | } | |
1214 | ||
092e6cd1 TK |
1215 | int session_set_tty(Session *s, const char *tty) { |
1216 | int r; | |
1217 | ||
1218 | assert(s); | |
1219 | assert(tty); | |
1220 | ||
1221 | r = free_and_strdup(&s->tty, tty); | |
1222 | if (r <= 0) /* 0 means the strings were equal */ | |
1223 | return r; | |
1224 | ||
5157b0d8 LP |
1225 | (void) session_save(s); |
1226 | (void) session_send_changed(s, "TTY", NULL); | |
092e6cd1 TK |
1227 | |
1228 | return 1; | |
1229 | } | |
1230 | ||
cc377381 | 1231 | static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
99534007 | 1232 | Session *s = ASSERT_PTR(userdata); |
cc377381 | 1233 | |
cc377381 LP |
1234 | assert(s->fifo_fd == fd); |
1235 | ||
1236 | /* EOF on the FIFO means the session died abnormally. */ | |
1237 | ||
1238 | session_remove_fifo(s); | |
bda62573 | 1239 | session_stop(s, /* force = */ false); |
cc377381 LP |
1240 | |
1241 | return 1; | |
bef422ae LP |
1242 | } |
1243 | ||
932e3ee7 LP |
1244 | int session_create_fifo(Session *s) { |
1245 | int r; | |
1246 | ||
31b79c2b LP |
1247 | assert(s); |
1248 | ||
b4f78aea | 1249 | /* Create FIFO */ |
932e3ee7 | 1250 | if (!s->fifo_path) { |
37c1d5e9 | 1251 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0, MKDIR_WARN_MODE); |
e6061ab2 LP |
1252 | if (r < 0) |
1253 | return r; | |
1254 | ||
d5ddc930 LP |
1255 | s->fifo_path = strjoin("/run/systemd/sessions/", s->id, ".ref"); |
1256 | if (!s->fifo_path) | |
932e3ee7 | 1257 | return -ENOMEM; |
31b79c2b | 1258 | |
932e3ee7 LP |
1259 | if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST) |
1260 | return -errno; | |
1261 | } | |
31b79c2b | 1262 | |
932e3ee7 | 1263 | /* Open reading side */ |
b4f78aea | 1264 | if (s->fifo_fd < 0) { |
db4a47e9 | 1265 | s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NONBLOCK); |
b4f78aea LP |
1266 | if (s->fifo_fd < 0) |
1267 | return -errno; | |
cc377381 LP |
1268 | } |
1269 | ||
1270 | if (!s->fifo_event_source) { | |
151b9b96 | 1271 | r = sd_event_add_io(s->manager->event, &s->fifo_event_source, s->fifo_fd, 0, session_dispatch_fifo, s); |
b4f78aea LP |
1272 | if (r < 0) |
1273 | return r; | |
1274 | ||
6c75e317 ZJS |
1275 | /* Let's make sure we noticed dead sessions before we process new bus requests (which might |
1276 | * create new sessions). */ | |
e11544a8 | 1277 | r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_NORMAL-10); |
cc377381 LP |
1278 | if (r < 0) |
1279 | return r; | |
b4f78aea | 1280 | } |
932e3ee7 LP |
1281 | |
1282 | /* Open writing side */ | |
7c248223 | 1283 | return RET_NERRNO(open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NONBLOCK)); |
932e3ee7 LP |
1284 | } |
1285 | ||
5f41d1f1 | 1286 | static void session_remove_fifo(Session *s) { |
932e3ee7 LP |
1287 | assert(s); |
1288 | ||
03e334a1 LP |
1289 | s->fifo_event_source = sd_event_source_unref(s->fifo_event_source); |
1290 | s->fifo_fd = safe_close(s->fifo_fd); | |
932e3ee7 LP |
1291 | |
1292 | if (s->fifo_path) { | |
75bbdf47 | 1293 | (void) unlink(s->fifo_path); |
a1e58e8e | 1294 | s->fifo_path = mfree(s->fifo_path); |
932e3ee7 | 1295 | } |
31b79c2b LP |
1296 | } |
1297 | ||
5c093a23 | 1298 | bool session_may_gc(Session *s, bool drop_not_started) { |
bd26aee1 LP |
1299 | int r; |
1300 | ||
20263082 LP |
1301 | assert(s); |
1302 | ||
4a4b033f | 1303 | if (drop_not_started && !s->started) |
5c093a23 | 1304 | return true; |
932e3ee7 | 1305 | |
9444b1f2 | 1306 | if (!s->user) |
5c093a23 | 1307 | return true; |
9444b1f2 | 1308 | |
76f2191d | 1309 | r = pidref_is_alive(&s->leader); |
9d5b6901 MY |
1310 | if (r == -ESRCH) |
1311 | /* Session has no leader. This is probably because the leader vanished before deserializing | |
1312 | * pidfd from FD store. */ | |
1313 | return true; | |
76f2191d | 1314 | if (r < 0) |
9d5b6901 | 1315 | log_debug_errno(r, "Unable to determine if leader PID " PID_FMT " is still alive, assuming not: %m", s->leader.pid); |
76f2191d MS |
1316 | if (r > 0) |
1317 | return false; | |
1318 | ||
9d5b6901 MY |
1319 | if (s->fifo_fd >= 0 && pipe_eof(s->fifo_fd) <= 0) |
1320 | return false; | |
20263082 | 1321 | |
bd26aee1 LP |
1322 | if (s->scope_job) { |
1323 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
1324 | ||
1325 | r = manager_job_is_active(s->manager, s->scope_job, &error); | |
1326 | if (r < 0) | |
1327 | log_debug_errno(r, "Failed to determine whether job '%s' is pending, ignoring: %s", s->scope_job, bus_error_message(&error, r)); | |
1328 | if (r != 0) | |
1329 | return false; | |
1330 | } | |
20263082 | 1331 | |
bd26aee1 LP |
1332 | if (s->scope) { |
1333 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
1334 | ||
1335 | r = manager_unit_is_active(s->manager, s->scope, &error); | |
1336 | if (r < 0) | |
1337 | log_debug_errno(r, "Failed to determine whether unit '%s' is active, ignoring: %s", s->scope, bus_error_message(&error, r)); | |
1338 | if (r != 0) | |
1339 | return false; | |
1340 | } | |
20263082 | 1341 | |
5c093a23 | 1342 | return true; |
20263082 LP |
1343 | } |
1344 | ||
14c3baca LP |
1345 | void session_add_to_gc_queue(Session *s) { |
1346 | assert(s); | |
1347 | ||
1348 | if (s->in_gc_queue) | |
1349 | return; | |
1350 | ||
71fda00f | 1351 | LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s); |
14c3baca LP |
1352 | s->in_gc_queue = true; |
1353 | } | |
1354 | ||
0604381b LP |
1355 | SessionState session_get_state(Session *s) { |
1356 | assert(s); | |
1357 | ||
8fe63cd4 | 1358 | /* always check closing first */ |
5f41d1f1 LP |
1359 | if (s->stopping || s->timer_event_source) |
1360 | return SESSION_CLOSING; | |
1361 | ||
76f2191d | 1362 | if (s->scope_job || (!pidref_is_set(&s->leader) && s->fifo_fd < 0)) |
405e0255 | 1363 | return SESSION_OPENING; |
fb6becb4 | 1364 | |
0604381b LP |
1365 | if (session_is_active(s)) |
1366 | return SESSION_ACTIVE; | |
1367 | ||
1368 | return SESSION_ONLINE; | |
1369 | } | |
1370 | ||
de07ab16 | 1371 | int session_kill(Session *s, KillWho who, int signo) { |
de07ab16 LP |
1372 | assert(s); |
1373 | ||
fb6becb4 | 1374 | if (!s->scope) |
de07ab16 LP |
1375 | return -ESRCH; |
1376 | ||
fb6becb4 | 1377 | return manager_kill_unit(s->manager, s->scope, who, signo, NULL); |
de07ab16 LP |
1378 | } |
1379 | ||
93041c60 MY |
1380 | static int session_open_vt(Session *s, bool reopen) { |
1381 | _cleanup_close_ int fd = -EBADF; | |
5f41d1f1 | 1382 | char path[sizeof("/dev/tty") + DECIMAL_STR_MAX(s->vtnr)]; |
90a18413 | 1383 | |
a8d5378a MY |
1384 | assert(s); |
1385 | ||
baccf3e4 OB |
1386 | if (s->vtnr < 1) |
1387 | return -ENODEV; | |
90a18413 | 1388 | |
93041c60 | 1389 | if (!reopen && s->vtfd >= 0) |
90a18413 DH |
1390 | return s->vtfd; |
1391 | ||
92bd5ff3 | 1392 | sprintf(path, "/dev/tty%u", s->vtnr); |
90a18413 | 1393 | |
93041c60 MY |
1394 | fd = open_terminal(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY); |
1395 | if (fd < 0) | |
1396 | return log_error_errno(fd, "Cannot open VT %s of session %s: %m", path, s->id); | |
1397 | ||
1398 | close_and_replace(s->vtfd, fd); | |
90a18413 DH |
1399 | return s->vtfd; |
1400 | } | |
1401 | ||
a03cdb17 | 1402 | static int session_prepare_vt(Session *s) { |
90a18413 | 1403 | int vt, r; |
9fb2c8b8 | 1404 | struct vt_mode mode = {}; |
90a18413 | 1405 | |
a8d5378a MY |
1406 | assert(s); |
1407 | ||
baccf3e4 OB |
1408 | if (s->vtnr < 1) |
1409 | return 0; | |
1410 | ||
93041c60 | 1411 | vt = session_open_vt(s, /* reopen = */ false); |
90a18413 | 1412 | if (vt < 0) |
baccf3e4 | 1413 | return vt; |
90a18413 | 1414 | |
22c902fa | 1415 | r = fchown(vt, s->user->user_record->uid, -1); |
baccf3e4 | 1416 | if (r < 0) { |
94c156cd LP |
1417 | r = log_error_errno(errno, |
1418 | "Cannot change owner of /dev/tty%u: %m", | |
1419 | s->vtnr); | |
d6176c6c | 1420 | goto error; |
baccf3e4 | 1421 | } |
d6176c6c | 1422 | |
90a18413 | 1423 | r = ioctl(vt, KDSKBMODE, K_OFF); |
baccf3e4 | 1424 | if (r < 0) { |
94c156cd LP |
1425 | r = log_error_errno(errno, |
1426 | "Cannot set K_OFF on /dev/tty%u: %m", | |
1427 | s->vtnr); | |
90a18413 | 1428 | goto error; |
baccf3e4 | 1429 | } |
90a18413 DH |
1430 | |
1431 | r = ioctl(vt, KDSETMODE, KD_GRAPHICS); | |
baccf3e4 | 1432 | if (r < 0) { |
94c156cd LP |
1433 | r = log_error_errno(errno, |
1434 | "Cannot set KD_GRAPHICS on /dev/tty%u: %m", | |
1435 | s->vtnr); | |
90a18413 | 1436 | goto error; |
baccf3e4 | 1437 | } |
90a18413 | 1438 | |
90a18413 DH |
1439 | /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS. |
1440 | * So we need a dummy handler here which just acknowledges *all* VT | |
1441 | * switch requests. */ | |
1442 | mode.mode = VT_PROCESS; | |
92683ad2 DH |
1443 | mode.relsig = SIGRTMIN; |
1444 | mode.acqsig = SIGRTMIN + 1; | |
90a18413 | 1445 | r = ioctl(vt, VT_SETMODE, &mode); |
baccf3e4 | 1446 | if (r < 0) { |
94c156cd LP |
1447 | r = log_error_errno(errno, |
1448 | "Cannot set VT_PROCESS on /dev/tty%u: %m", | |
1449 | s->vtnr); | |
90a18413 | 1450 | goto error; |
baccf3e4 | 1451 | } |
90a18413 | 1452 | |
baccf3e4 | 1453 | return 0; |
90a18413 DH |
1454 | |
1455 | error: | |
90a18413 | 1456 | session_restore_vt(s); |
baccf3e4 | 1457 | return r; |
90a18413 DH |
1458 | } |
1459 | ||
0212126c | 1460 | static void session_restore_vt(Session *s) { |
8246905a | 1461 | int r; |
128df4cf | 1462 | |
a8d5378a MY |
1463 | assert(s); |
1464 | ||
092e6cd1 TK |
1465 | if (s->vtfd < 0) |
1466 | return; | |
1467 | ||
8246905a FB |
1468 | r = vt_restore(s->vtfd); |
1469 | if (r == -EIO) { | |
8246905a FB |
1470 | /* It might happen if the controlling process exited before or while we were |
1471 | * restoring the VT as it would leave the old file-descriptor in a hung-up | |
1472 | * state. In this case let's retry with a fresh handle to the virtual terminal. */ | |
ad96887a | 1473 | |
8246905a FB |
1474 | /* We do a little dance to avoid having the terminal be available |
1475 | * for reuse before we've cleaned it up. */ | |
8246905a | 1476 | |
93041c60 MY |
1477 | int fd = session_open_vt(s, /* reopen = */ true); |
1478 | if (fd >= 0) | |
1479 | r = vt_restore(fd); | |
8246905a | 1480 | } |
c0f34168 FB |
1481 | if (r < 0) |
1482 | log_warning_errno(r, "Failed to restore VT, ignoring: %m"); | |
d6176c6c | 1483 | |
03e334a1 | 1484 | s->vtfd = safe_close(s->vtfd); |
90a18413 DH |
1485 | } |
1486 | ||
2ec3ff66 | 1487 | void session_leave_vt(Session *s) { |
ce540a24 DH |
1488 | int r; |
1489 | ||
2ec3ff66 DH |
1490 | assert(s); |
1491 | ||
1492 | /* This is called whenever we get a VT-switch signal from the kernel. | |
1493 | * We acknowledge all of them unconditionally. Note that session are | |
1494 | * free to overwrite those handlers and we only register them for | |
1495 | * sessions with controllers. Legacy sessions are not affected. | |
1496 | * However, if we switch from a non-legacy to a legacy session, we must | |
1497 | * make sure to pause all device before acknowledging the switch. We | |
1498 | * process the real switch only after we are notified via sysfs, so the | |
1499 | * legacy session might have already started using the devices. If we | |
1500 | * don't pause the devices before the switch, we might confuse the | |
1501 | * session we switch to. */ | |
1502 | ||
1503 | if (s->vtfd < 0) | |
1504 | return; | |
1505 | ||
1506 | session_device_pause_all(s); | |
93041c60 | 1507 | r = vt_release(s->vtfd, /* restore = */ false); |
99d4ad71 | 1508 | if (r == -EIO) { |
93041c60 | 1509 | /* Handle the same VT hung-up case as in session_restore_vt */ |
99d4ad71 | 1510 | |
93041c60 MY |
1511 | int fd = session_open_vt(s, /* reopen = */ true); |
1512 | if (fd >= 0) | |
1513 | r = vt_release(fd, /* restore = */ false); | |
99d4ad71 | 1514 | } |
ce540a24 | 1515 | if (r < 0) |
27dafac9 | 1516 | log_debug_errno(r, "Cannot release VT of session %s: %m", s->id); |
2ec3ff66 DH |
1517 | } |
1518 | ||
cc377381 | 1519 | bool session_is_controller(Session *s, const char *sender) { |
e5c09aad | 1520 | return streq_ptr(ASSERT_PTR(s)->controller, sender); |
ae5e06bd DH |
1521 | } |
1522 | ||
b12e5615 | 1523 | static void session_release_controller(Session *s, bool notify) { |
d7ac0952 | 1524 | _unused_ _cleanup_free_ char *name = NULL; |
6d33772f DH |
1525 | SessionDevice *sd; |
1526 | ||
a8d5378a MY |
1527 | assert(s); |
1528 | ||
b12e5615 DH |
1529 | if (!s->controller) |
1530 | return; | |
6d33772f | 1531 | |
b12e5615 | 1532 | name = s->controller; |
90a18413 | 1533 | |
6c75e317 ZJS |
1534 | /* By resetting the controller before releasing the devices, we won't send notification signals. |
1535 | * This avoids sending useless notifications if the controller is released on disconnects. */ | |
b12e5615 DH |
1536 | if (!notify) |
1537 | s->controller = NULL; | |
6d33772f | 1538 | |
b12e5615 DH |
1539 | while ((sd = hashmap_first(s->devices))) |
1540 | session_device_free(sd); | |
1541 | ||
1542 | s->controller = NULL; | |
3cde9e8f DM |
1543 | s->track = sd_bus_track_unref(s->track); |
1544 | } | |
1545 | ||
1546 | static int on_bus_track(sd_bus_track *track, void *userdata) { | |
99534007 | 1547 | Session *s = ASSERT_PTR(userdata); |
3cde9e8f DM |
1548 | |
1549 | assert(track); | |
3cde9e8f DM |
1550 | |
1551 | session_drop_controller(s); | |
1552 | ||
1553 | return 0; | |
6d33772f DH |
1554 | } |
1555 | ||
dc6284e9 | 1556 | int session_set_controller(Session *s, const char *sender, bool force, bool prepare) { |
b12e5615 | 1557 | _cleanup_free_ char *name = NULL; |
ae5e06bd DH |
1558 | int r; |
1559 | ||
1560 | assert(s); | |
1561 | assert(sender); | |
1562 | ||
1563 | if (session_is_controller(s, sender)) | |
1564 | return 0; | |
1565 | if (s->controller && !force) | |
1566 | return -EBUSY; | |
1567 | ||
b12e5615 DH |
1568 | name = strdup(sender); |
1569 | if (!name) | |
ae5e06bd DH |
1570 | return -ENOMEM; |
1571 | ||
3cde9e8f DM |
1572 | s->track = sd_bus_track_unref(s->track); |
1573 | r = sd_bus_track_new(s->manager->bus, &s->track, on_bus_track, s); | |
1574 | if (r < 0) | |
1575 | return r; | |
1576 | ||
1577 | r = sd_bus_track_add_name(s->track, name); | |
1578 | if (r < 0) | |
ae5e06bd | 1579 | return r; |
ae5e06bd | 1580 | |
90a18413 DH |
1581 | /* When setting a session controller, we forcibly mute the VT and set |
1582 | * it into graphics-mode. Applications can override that by changing | |
1583 | * VT state after calling TakeControl(). However, this serves as a good | |
1584 | * default and well-behaving controllers can now ignore VTs entirely. | |
1585 | * Note that we reset the VT on ReleaseControl() and if the controller | |
1586 | * exits. | |
1587 | * If logind crashes/restarts, we restore the controller during restart | |
dc6284e9 FB |
1588 | * (without preparing the VT since the controller has probably overridden |
1589 | * VT state by now) or reset the VT in case it crashed/exited, too. */ | |
1590 | if (prepare) { | |
1591 | r = session_prepare_vt(s); | |
1592 | if (r < 0) { | |
1593 | s->track = sd_bus_track_unref(s->track); | |
1594 | return r; | |
1595 | } | |
13f493dc | 1596 | } |
baccf3e4 | 1597 | |
b12e5615 | 1598 | session_release_controller(s, true); |
ae2a15bc | 1599 | s->controller = TAKE_PTR(name); |
5157b0d8 | 1600 | (void) session_save(s); |
90a18413 | 1601 | |
ae5e06bd DH |
1602 | return 0; |
1603 | } | |
1604 | ||
1605 | void session_drop_controller(Session *s) { | |
1606 | assert(s); | |
1607 | ||
1608 | if (!s->controller) | |
1609 | return; | |
1610 | ||
3cde9e8f | 1611 | s->track = sd_bus_track_unref(s->track); |
db72aea4 | 1612 | session_set_type(s, s->original_type); |
b12e5615 | 1613 | session_release_controller(s, false); |
5157b0d8 | 1614 | (void) session_save(s); |
b12e5615 | 1615 | session_restore_vt(s); |
ae5e06bd DH |
1616 | } |
1617 | ||
fb6becb4 LP |
1618 | static const char* const session_state_table[_SESSION_STATE_MAX] = { |
1619 | [SESSION_OPENING] = "opening", | |
6c75e317 ZJS |
1620 | [SESSION_ONLINE] = "online", |
1621 | [SESSION_ACTIVE] = "active", | |
1622 | [SESSION_CLOSING] = "closing", | |
0604381b LP |
1623 | }; |
1624 | ||
1625 | DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState); | |
1626 | ||
20263082 | 1627 | static const char* const session_type_table[_SESSION_TYPE_MAX] = { |
2c5859af | 1628 | [SESSION_UNSPECIFIED] = "unspecified", |
6c75e317 ZJS |
1629 | [SESSION_TTY] = "tty", |
1630 | [SESSION_X11] = "x11", | |
1631 | [SESSION_WAYLAND] = "wayland", | |
1632 | [SESSION_MIR] = "mir", | |
1633 | [SESSION_WEB] = "web", | |
20263082 LP |
1634 | }; |
1635 | ||
1636 | DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType); | |
de07ab16 | 1637 | |
55efac6c | 1638 | static const char* const session_class_table[_SESSION_CLASS_MAX] = { |
6c75e317 ZJS |
1639 | [SESSION_USER] = "user", |
1640 | [SESSION_GREETER] = "greeter", | |
e2acb67b | 1641 | [SESSION_LOCK_SCREEN] = "lock-screen", |
6c75e317 | 1642 | [SESSION_BACKGROUND] = "background", |
55efac6c LP |
1643 | }; |
1644 | ||
1645 | DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass); | |
1646 | ||
de07ab16 LP |
1647 | static const char* const kill_who_table[_KILL_WHO_MAX] = { |
1648 | [KILL_LEADER] = "leader", | |
6c75e317 | 1649 | [KILL_ALL] = "all", |
de07ab16 LP |
1650 | }; |
1651 | ||
1652 | DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); | |
3d0ef5c7 LP |
1653 | |
1654 | static const char* const tty_validity_table[_TTY_VALIDITY_MAX] = { | |
6c75e317 ZJS |
1655 | [TTY_FROM_PAM] = "from-pam", |
1656 | [TTY_FROM_UTMP] = "from-utmp", | |
3d0ef5c7 LP |
1657 | [TTY_UTMP_INCONSISTENT] = "utmp-inconsistent", |
1658 | }; | |
1659 | ||
1660 | DEFINE_STRING_TABLE_LOOKUP(tty_validity, TTYValidity); |