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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" |
8e1ac16b | 41 | #include "uid-classification.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 | |
2454cee3 | 49 | int session_new(Manager *m, const char *id, Session **ret) { |
8c29a457 LP |
50 | _cleanup_(session_freep) Session *s = NULL; |
51 | int r; | |
20263082 LP |
52 | |
53 | assert(m); | |
54 | assert(id); | |
2454cee3 | 55 | assert(ret); |
20263082 | 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, | |
c1f04b83 MY |
66 | .id = strdup(id), |
67 | .state_file = path_join("/run/systemd/sessions/", id), | |
254d1313 ZJS |
68 | .fifo_fd = -EBADF, |
69 | .vtfd = -EBADF, | |
8c29a457 | 70 | .audit_id = AUDIT_SESSION_INVALID, |
3d0ef5c7 | 71 | .tty_validity = _TTY_VALIDITY_INVALID, |
89bad70f | 72 | .leader = PIDREF_NULL, |
8c29a457 | 73 | }; |
c1f04b83 | 74 | if (!s->id || !s->state_file) |
8c29a457 | 75 | return -ENOMEM; |
118ecf32 | 76 | |
8c29a457 LP |
77 | s->devices = hashmap_new(&devt_hash_ops); |
78 | if (!s->devices) | |
79 | return -ENOMEM; | |
20263082 | 80 | |
8c29a457 LP |
81 | r = hashmap_put(m->sessions, s->id, s); |
82 | if (r < 0) | |
83 | return r; | |
20263082 | 84 | |
8c29a457 LP |
85 | *ret = TAKE_PTR(s); |
86 | return 0; | |
20263082 LP |
87 | } |
88 | ||
0ae9073f MY |
89 | static int session_dispatch_leader_pidfd(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
90 | Session *s = ASSERT_PTR(userdata); | |
91 | ||
92 | assert(s->leader.fd == fd); | |
93 | session_stop(s, /* force= */ false); | |
94 | ||
95 | return 1; | |
96 | } | |
97 | ||
98 | static int session_watch_pidfd(Session *s) { | |
99 | int r; | |
100 | ||
101 | assert(s); | |
102 | assert(s->manager); | |
103 | assert(pidref_is_set(&s->leader)); | |
104 | ||
105 | if (s->leader.fd < 0) | |
106 | return 0; | |
107 | ||
108 | r = sd_event_add_io(s->manager->event, &s->leader_pidfd_event_source, s->leader.fd, EPOLLIN, session_dispatch_leader_pidfd, s); | |
109 | if (r < 0) | |
110 | return r; | |
111 | ||
112 | r = sd_event_source_set_priority(s->leader_pidfd_event_source, SD_EVENT_PRIORITY_IMPORTANT); | |
113 | if (r < 0) | |
114 | return r; | |
115 | ||
116 | (void) sd_event_source_set_description(s->leader_pidfd_event_source, "session-pidfd"); | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
9d5b6901 | 121 | static void session_reset_leader(Session *s, bool keep_fdstore) { |
8494f562 MY |
122 | assert(s); |
123 | ||
9d5b6901 MY |
124 | if (!keep_fdstore) { |
125 | /* Clear fdstore if we're asked to, no matter if s->leader is set or not, so that when | |
126 | * initially deserializing leader fd we clear the old fd too. */ | |
127 | (void) notify_remove_fd_warnf("session-%s-leader-fd", s->id); | |
128 | s->leader_fd_saved = false; | |
129 | } | |
130 | ||
8494f562 MY |
131 | if (!pidref_is_set(&s->leader)) |
132 | return; | |
133 | ||
0ae9073f MY |
134 | s->leader_pidfd_event_source = sd_event_source_disable_unref(s->leader_pidfd_event_source); |
135 | ||
889975bb | 136 | (void) hashmap_remove_value(s->manager->sessions_by_leader, &s->leader, s); |
8494f562 MY |
137 | |
138 | return pidref_done(&s->leader); | |
139 | } | |
140 | ||
8c29a457 | 141 | Session* session_free(Session *s) { |
118ecf32 DH |
142 | SessionDevice *sd; |
143 | ||
8c29a457 LP |
144 | if (!s) |
145 | return NULL; | |
20263082 | 146 | |
c1f04b83 MY |
147 | sd_event_source_unref(s->stop_on_idle_event_source); |
148 | ||
14c3baca | 149 | if (s->in_gc_queue) |
71fda00f | 150 | LIST_REMOVE(gc_queue, s->manager->session_gc_queue, s); |
14c3baca | 151 | |
c1f04b83 | 152 | sd_event_source_unref(s->timer_event_source); |
5f41d1f1 | 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); |
6e9bf0ad | 190 | sd_bus_message_unref(s->upgrade_message); |
20263082 LP |
191 | |
192 | free(s->tty); | |
193 | free(s->display); | |
194 | free(s->remote_host); | |
3f49d45a | 195 | free(s->remote_user); |
98a28fef | 196 | free(s->service); |
a4cd87e9 | 197 | free(s->desktop); |
20263082 LP |
198 | |
199 | hashmap_remove(s->manager->sessions, s->id); | |
98a28fef | 200 | |
c20b8dad LP |
201 | sd_event_source_unref(s->fifo_event_source); |
202 | safe_close(s->fifo_fd); | |
203 | ||
204 | /* Note that we remove neither the state file nor the fifo path here, since we want both to survive | |
205 | * daemon restarts */ | |
c20b8dad | 206 | free(s->fifo_path); |
c1f04b83 MY |
207 | free(s->state_file); |
208 | free(s->id); | |
82325af3 | 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) { |
52bcc872 MY |
720 | _cleanup_free_ char *scope = NULL; |
721 | const char *description; | |
98a28fef LP |
722 | int r; |
723 | ||
724 | assert(s); | |
9444b1f2 | 725 | assert(s->user); |
98a28fef | 726 | |
5099a50d LP |
727 | if (!SESSION_CLASS_WANTS_SCOPE(s->class)) |
728 | return 0; | |
729 | ||
52bcc872 MY |
730 | if (s->scope) |
731 | goto finish; | |
732 | ||
733 | s->scope_job = mfree(s->scope_job); | |
734 | ||
735 | scope = strjoin("session-", s->id, ".scope"); | |
736 | if (!scope) | |
737 | return log_oom(); | |
738 | ||
739 | description = strjoina("Session ", s->id, " of User ", s->user->user_record->user_name); | |
740 | ||
741 | r = manager_start_scope( | |
742 | s->manager, | |
743 | scope, | |
744 | &s->leader, | |
8ba3efed | 745 | /* allow_pidfd = */ true, |
52bcc872 MY |
746 | s->user->slice, |
747 | description, | |
748 | /* These should have been pulled in explicitly in user_start(). Just to be sure. */ | |
749 | STRV_MAKE_CONST(s->user->runtime_dir_unit, | |
750 | SESSION_CLASS_WANTS_SERVICE_MANAGER(s->class) ? s->user->service_manager_unit : NULL), | |
751 | /* We usually want to order session scopes after systemd-user-sessions.service | |
752 | * since the unit is used as login session barrier for unprivileged users. However | |
753 | * the barrier doesn't apply for root as sysadmin should always be able to log in | |
754 | * (and without waiting for any timeout to expire) in case something goes wrong | |
755 | * during the boot process. */ | |
756 | STRV_MAKE_CONST("systemd-logind.service", | |
757 | SESSION_CLASS_IS_EARLY(s->class) ? NULL : "systemd-user-sessions.service"), | |
758 | user_record_home_directory(s->user->user_record), | |
759 | properties, | |
760 | error, | |
761 | &s->scope_job); | |
762 | if (r < 0) | |
763 | return log_error_errno(r, "Failed to start session scope %s: %s", | |
764 | scope, bus_error_message(error, r)); | |
fb2367ed | 765 | |
52bcc872 | 766 | s->scope = TAKE_PTR(scope); |
20263082 | 767 | |
52bcc872 | 768 | finish: |
124d7cb2 | 769 | (void) hashmap_put(s->manager->session_units, s->scope, s); |
20263082 LP |
770 | return 0; |
771 | } | |
772 | ||
82325af3 MS |
773 | static int session_dispatch_stop_on_idle(sd_event_source *source, uint64_t t, void *userdata) { |
774 | Session *s = userdata; | |
775 | dual_timestamp ts; | |
776 | int r, idle; | |
777 | ||
778 | assert(s); | |
779 | ||
780 | if (s->stopping) | |
781 | return 0; | |
782 | ||
783 | idle = session_get_idle_hint(s, &ts); | |
784 | if (idle) { | |
6269ffe7 | 785 | log_info("Session \"%s\" of user \"%s\" is idle, stopping.", s->id, s->user->user_record->user_name); |
82325af3 MS |
786 | |
787 | return session_stop(s, /* force */ true); | |
788 | } | |
789 | ||
ab7ae746 MS |
790 | r = sd_event_source_set_time( |
791 | source, | |
792 | usec_add(dual_timestamp_is_set(&ts) ? ts.monotonic : now(CLOCK_MONOTONIC), | |
793 | s->manager->stop_idle_session_usec)); | |
82325af3 MS |
794 | if (r < 0) |
795 | return log_error_errno(r, "Failed to configure stop on idle session event source: %m"); | |
796 | ||
797 | r = sd_event_source_set_enabled(source, SD_EVENT_ONESHOT); | |
798 | if (r < 0) | |
799 | return log_error_errno(r, "Failed to enable stop on idle session event source: %m"); | |
800 | ||
801 | return 1; | |
802 | } | |
803 | ||
804 | static int session_setup_stop_on_idle_timer(Session *s) { | |
805 | int r; | |
806 | ||
807 | assert(s); | |
808 | ||
ad23439e | 809 | if (s->manager->stop_idle_session_usec == USEC_INFINITY || !SESSION_CLASS_CAN_STOP_ON_IDLE(s->class)) |
82325af3 MS |
810 | return 0; |
811 | ||
812 | r = sd_event_add_time_relative( | |
813 | s->manager->event, | |
814 | &s->stop_on_idle_event_source, | |
815 | CLOCK_MONOTONIC, | |
816 | s->manager->stop_idle_session_usec, | |
817 | 0, | |
818 | session_dispatch_stop_on_idle, s); | |
819 | if (r < 0) | |
820 | return log_error_errno(r, "Failed to add stop on idle session event source: %m"); | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
25a1ab4e | 825 | int session_start(Session *s, sd_bus_message *properties, sd_bus_error *error) { |
20263082 LP |
826 | int r; |
827 | ||
828 | assert(s); | |
9444b1f2 LP |
829 | |
830 | if (!s->user) | |
831 | return -ESTALE; | |
20263082 | 832 | |
25a1ab4e LP |
833 | if (s->stopping) |
834 | return -EINVAL; | |
835 | ||
9418f147 LP |
836 | if (s->started) |
837 | return 0; | |
838 | ||
513cf7da | 839 | r = user_start(s->user); |
ed18b08b LP |
840 | if (r < 0) |
841 | return r; | |
842 | ||
25a1ab4e | 843 | r = session_start_scope(s, properties, error); |
fb6becb4 LP |
844 | if (r < 0) |
845 | return r; | |
846 | ||
82325af3 MS |
847 | r = session_setup_stop_on_idle_timer(s); |
848 | if (r < 0) | |
849 | return r; | |
850 | ||
d9eb81f9 | 851 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
2b044526 | 852 | "MESSAGE_ID=" SD_MESSAGE_SESSION_START_STR, |
877d54e9 | 853 | "SESSION_ID=%s", s->id, |
22c902fa | 854 | "USER_ID=%s", s->user->user_record->user_name, |
89bad70f | 855 | "LEADER="PID_FMT, s->leader.pid, |
22c902fa | 856 | LOG_MESSAGE("New session %s of user %s.", s->id, s->user->user_record->user_name)); |
98a28fef | 857 | |
9444b1f2 | 858 | if (!dual_timestamp_is_set(&s->timestamp)) |
fa5a0251 | 859 | dual_timestamp_now(&s->timestamp); |
14c3baca | 860 | |
e9816c48 LP |
861 | if (s->seat) |
862 | seat_read_active_vt(s->seat); | |
863 | ||
9418f147 LP |
864 | s->started = true; |
865 | ||
952d3260 LP |
866 | user_elect_display(s->user); |
867 | ||
5f41d1f1 | 868 | /* Save data */ |
5157b0d8 LP |
869 | (void) session_save(s); |
870 | (void) user_save(s->user); | |
5f41d1f1 | 871 | if (s->seat) |
5157b0d8 | 872 | (void) seat_save(s->seat); |
e9816c48 | 873 | |
5f41d1f1 | 874 | /* Send signals */ |
da119395 | 875 | session_send_signal(s, true); |
7d049e30 | 876 | user_send_changed(s->user, "Display", NULL); |
40771cf5 LP |
877 | |
878 | if (s->seat && s->seat->active == s) | |
5157b0d8 | 879 | (void) seat_send_changed(s->seat, "ActiveSession", NULL); |
9418f147 | 880 | |
20263082 LP |
881 | return 0; |
882 | } | |
883 | ||
9bb69af4 | 884 | static int session_stop_scope(Session *s, bool force) { |
4afd3348 | 885 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
20263082 | 886 | int r; |
20263082 LP |
887 | |
888 | assert(s); | |
889 | ||
fb6becb4 LP |
890 | if (!s->scope) |
891 | return 0; | |
9b221b63 | 892 | |
756ed0e2 | 893 | /* Let's always abandon the scope first. This tells systemd that we are not interested anymore, and everything |
629ff674 | 894 | * that is left in the scope is "left-over". Informing systemd about this has the benefit that it will log |
756ed0e2 LP |
895 | * when killing any processes left after this point. */ |
896 | r = manager_abandon_scope(s->manager, s->scope, &error); | |
25a1ab4e | 897 | if (r < 0) { |
756ed0e2 | 898 | log_warning_errno(r, "Failed to abandon session scope, ignoring: %s", bus_error_message(&error, r)); |
25a1ab4e LP |
899 | sd_bus_error_free(&error); |
900 | } | |
901 | ||
902 | s->scope_job = mfree(s->scope_job); | |
756ed0e2 LP |
903 | |
904 | /* Optionally, let's kill everything that's left now. */ | |
156a3637 LP |
905 | if (force || |
906 | (s->user->user_record->kill_processes != 0 && | |
907 | (s->user->user_record->kill_processes > 0 || | |
908 | manager_shall_kill(s->manager, s->user->user_record->user_name)))) { | |
801a884d | 909 | |
1a42ce09 | 910 | r = manager_stop_unit(s->manager, s->scope, force ? "replace" : "fail", &error, &s->scope_job); |
25a1ab4e LP |
911 | if (r < 0) { |
912 | if (force) | |
913 | return log_error_errno(r, "Failed to stop session scope: %s", bus_error_message(&error, r)); | |
20263082 | 914 | |
25a1ab4e LP |
915 | log_warning_errno(r, "Failed to stop session scope, ignoring: %s", bus_error_message(&error, r)); |
916 | } | |
8150acb1 | 917 | } else { |
20263082 | 918 | |
8150acb1 AJ |
919 | /* With no killing, this session is allowed to persist in "closing" state indefinitely. |
920 | * Therefore session stop and session removal may be two distinct events. | |
921 | * Session stop is quite significant on its own, let's log it. */ | |
922 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, | |
923 | "SESSION_ID=%s", s->id, | |
22c902fa | 924 | "USER_ID=%s", s->user->user_record->user_name, |
89bad70f | 925 | "LEADER="PID_FMT, s->leader.pid, |
f4cf1d66 | 926 | LOG_MESSAGE("Session %s logged out. Waiting for processes to exit.", s->id)); |
8150acb1 AJ |
927 | } |
928 | ||
9b221b63 | 929 | return 0; |
20263082 LP |
930 | } |
931 | ||
9bb69af4 | 932 | int session_stop(Session *s, bool force) { |
405e0255 LP |
933 | int r; |
934 | ||
935 | assert(s); | |
936 | ||
25a1ab4e LP |
937 | /* This is called whenever we begin with tearing down a session record. It's called in four cases: explicit API |
938 | * request via the bus (either directly for the session object or for the seat or user object this session | |
939 | * belongs to; 'force' is true), or due to automatic GC (i.e. scope vanished; 'force' is false), or because the | |
940 | * session FIFO saw an EOF ('force' is false), or because the release timer hit ('force' is false). */ | |
941 | ||
405e0255 LP |
942 | if (!s->user) |
943 | return -ESTALE; | |
25a1ab4e LP |
944 | if (!s->started) |
945 | return 0; | |
946 | if (s->stopping) | |
947 | return 0; | |
405e0255 | 948 | |
5f41d1f1 | 949 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
76f2191d | 950 | s->leader_pidfd_event_source = sd_event_source_unref(s->leader_pidfd_event_source); |
5f41d1f1 | 951 | |
10189fd6 DH |
952 | if (s->seat) |
953 | seat_evict_position(s->seat, s); | |
954 | ||
5f41d1f1 LP |
955 | /* We are going down, don't care about FIFOs anymore */ |
956 | session_remove_fifo(s); | |
957 | ||
405e0255 | 958 | /* Kill cgroup */ |
9bb69af4 | 959 | r = session_stop_scope(s, force); |
405e0255 | 960 | |
5f41d1f1 LP |
961 | s->stopping = true; |
962 | ||
952d3260 LP |
963 | user_elect_display(s->user); |
964 | ||
5157b0d8 LP |
965 | (void) session_save(s); |
966 | (void) user_save(s->user); | |
405e0255 LP |
967 | |
968 | return r; | |
969 | } | |
970 | ||
971 | int session_finalize(Session *s) { | |
118ecf32 | 972 | SessionDevice *sd; |
20263082 LP |
973 | |
974 | assert(s); | |
975 | ||
9444b1f2 LP |
976 | if (!s->user) |
977 | return -ESTALE; | |
978 | ||
ed18b08b | 979 | if (s->started) |
d9eb81f9 | 980 | log_struct(s->class == SESSION_BACKGROUND ? LOG_DEBUG : LOG_INFO, |
2b044526 | 981 | "MESSAGE_ID=" SD_MESSAGE_SESSION_STOP_STR, |
877d54e9 | 982 | "SESSION_ID=%s", s->id, |
22c902fa | 983 | "USER_ID=%s", s->user->user_record->user_name, |
89bad70f | 984 | "LEADER="PID_FMT, s->leader.pid, |
a1230ff9 | 985 | LOG_MESSAGE("Removed session %s.", s->id)); |
98a28fef | 986 | |
5f41d1f1 LP |
987 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
988 | ||
10189fd6 DH |
989 | if (s->seat) |
990 | seat_evict_position(s->seat, s); | |
991 | ||
118ecf32 DH |
992 | /* Kill session devices */ |
993 | while ((sd = hashmap_first(s->devices))) | |
994 | session_device_free(sd); | |
995 | ||
491ac9f2 | 996 | (void) unlink(s->state_file); |
d2f92cdf | 997 | session_add_to_gc_queue(s); |
ed18b08b | 998 | user_add_to_gc_queue(s->user); |
14c3baca | 999 | |
405e0255 | 1000 | if (s->started) { |
ed18b08b | 1001 | session_send_signal(s, false); |
405e0255 LP |
1002 | s->started = false; |
1003 | } | |
50fb9793 | 1004 | |
9418f147 LP |
1005 | if (s->seat) { |
1006 | if (s->seat->active == s) | |
1007 | seat_set_active(s->seat, NULL); | |
1008 | ||
23bd3b62 | 1009 | seat_save(s->seat); |
9418f147 LP |
1010 | } |
1011 | ||
9d5b6901 | 1012 | session_reset_leader(s, /* keep_fdstore = */ false); |
76f2191d | 1013 | |
5157b0d8 LP |
1014 | (void) user_save(s->user); |
1015 | (void) user_send_changed(s->user, "Display", NULL); | |
9418f147 | 1016 | |
491ac9f2 | 1017 | return 0; |
20263082 LP |
1018 | } |
1019 | ||
5f41d1f1 | 1020 | static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) { |
99534007 | 1021 | Session *s = ASSERT_PTR(userdata); |
5f41d1f1 LP |
1022 | |
1023 | assert(es); | |
5f41d1f1 | 1024 | |
bda62573 | 1025 | session_stop(s, /* force = */ false); |
5f41d1f1 LP |
1026 | return 0; |
1027 | } | |
1028 | ||
ad8780c9 | 1029 | int session_release(Session *s) { |
5f41d1f1 LP |
1030 | assert(s); |
1031 | ||
1032 | if (!s->started || s->stopping) | |
ad8780c9 ZJS |
1033 | return 0; |
1034 | ||
1035 | if (s->timer_event_source) | |
1036 | return 0; | |
1037 | ||
39cf0351 LP |
1038 | return sd_event_add_time_relative( |
1039 | s->manager->event, | |
1040 | &s->timer_event_source, | |
1041 | CLOCK_MONOTONIC, | |
1042 | RELEASE_USEC, 0, | |
1043 | release_timeout_callback, s); | |
5f41d1f1 LP |
1044 | } |
1045 | ||
20263082 LP |
1046 | bool session_is_active(Session *s) { |
1047 | assert(s); | |
1048 | ||
1049 | if (!s->seat) | |
1050 | return true; | |
1051 | ||
1052 | return s->seat->active == s; | |
1053 | } | |
1054 | ||
23406ce5 LP |
1055 | static int get_tty_atime(const char *tty, usec_t *atime) { |
1056 | _cleanup_free_ char *p = NULL; | |
a185c5aa | 1057 | struct stat st; |
23406ce5 LP |
1058 | |
1059 | assert(tty); | |
1060 | assert(atime); | |
1061 | ||
1062 | if (!path_is_absolute(tty)) { | |
b910cc72 | 1063 | p = path_join("/dev", tty); |
23406ce5 LP |
1064 | if (!p) |
1065 | return -ENOMEM; | |
1066 | ||
1067 | tty = p; | |
1068 | } else if (!path_startswith(tty, "/dev/")) | |
1069 | return -ENOENT; | |
1070 | ||
1071 | if (lstat(tty, &st) < 0) | |
1072 | return -errno; | |
1073 | ||
1074 | *atime = timespec_load(&st.st_atim); | |
1075 | return 0; | |
1076 | } | |
1077 | ||
1078 | static int get_process_ctty_atime(pid_t pid, usec_t *atime) { | |
1079 | _cleanup_free_ char *p = NULL; | |
1080 | int r; | |
1081 | ||
1082 | assert(pid > 0); | |
1083 | assert(atime); | |
1084 | ||
1085 | r = get_ctty(pid, NULL, &p); | |
1086 | if (r < 0) | |
1087 | return r; | |
1088 | ||
1089 | return get_tty_atime(p, atime); | |
1090 | } | |
1091 | ||
1092 | int session_get_idle_hint(Session *s, dual_timestamp *t) { | |
82325af3 | 1093 | usec_t atime = 0, dtime = 0; |
23406ce5 | 1094 | int r; |
a185c5aa LP |
1095 | |
1096 | assert(s); | |
1097 | ||
be2bb14f LP |
1098 | /* Graphical sessions have an explicit idle hint */ |
1099 | if (SESSION_TYPE_IS_GRAPHICAL(s->type)) { | |
a185c5aa LP |
1100 | if (t) |
1101 | *t = s->idle_hint_timestamp; | |
1102 | ||
1103 | return s->idle_hint; | |
1104 | } | |
1105 | ||
20604ff2 LP |
1106 | if (s->type == SESSION_TTY) { |
1107 | /* For sessions with an explicitly configured tty, let's check its atime */ | |
1108 | if (s->tty) { | |
1109 | r = get_tty_atime(s->tty, &atime); | |
1110 | if (r >= 0) | |
1111 | goto found_atime; | |
1112 | } | |
a185c5aa | 1113 | |
20604ff2 LP |
1114 | /* For sessions with a leader but no explicitly configured tty, let's check the controlling tty of |
1115 | * the leader */ | |
1116 | if (pidref_is_set(&s->leader)) { | |
1117 | r = get_process_ctty_atime(s->leader.pid, &atime); | |
1118 | if (r >= 0) | |
1119 | goto found_atime; | |
1120 | } | |
a185c5aa LP |
1121 | } |
1122 | ||
a185c5aa | 1123 | if (t) |
be2bb14f | 1124 | *t = DUAL_TIMESTAMP_NULL; |
a185c5aa | 1125 | |
be2bb14f | 1126 | return false; |
23406ce5 LP |
1127 | |
1128 | found_atime: | |
1129 | if (t) | |
1130 | dual_timestamp_from_realtime(t, atime); | |
1131 | ||
82325af3 MS |
1132 | if (s->manager->idle_action_usec > 0 && s->manager->stop_idle_session_usec != USEC_INFINITY) |
1133 | dtime = MIN(s->manager->idle_action_usec, s->manager->stop_idle_session_usec); | |
1134 | else if (s->manager->idle_action_usec > 0) | |
1135 | dtime = s->manager->idle_action_usec; | |
1136 | else if (s->manager->stop_idle_session_usec != USEC_INFINITY) | |
1137 | dtime = s->manager->stop_idle_session_usec; | |
1138 | else | |
be2bb14f | 1139 | return false; |
23406ce5 | 1140 | |
82325af3 | 1141 | return usec_add(atime, dtime) <= now(CLOCK_REALTIME); |
a185c5aa LP |
1142 | } |
1143 | ||
be2bb14f | 1144 | int session_set_idle_hint(Session *s, bool b) { |
bef422ae LP |
1145 | assert(s); |
1146 | ||
b4f01bc1 LP |
1147 | if (!SESSION_CLASS_CAN_IDLE(s->class)) /* Only some session classes know the idle concept at all */ |
1148 | return -ENOTTY; | |
1149 | if (!SESSION_TYPE_IS_GRAPHICAL(s->type)) /* And only graphical session types can set the field explicitly */ | |
be2bb14f LP |
1150 | return -ENOTTY; |
1151 | ||
bef422ae | 1152 | if (s->idle_hint == b) |
be2bb14f | 1153 | return 0; |
bef422ae LP |
1154 | |
1155 | s->idle_hint = b; | |
fa5a0251 | 1156 | dual_timestamp_now(&s->idle_hint_timestamp); |
9418f147 | 1157 | |
cc377381 | 1158 | session_send_changed(s, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
9418f147 LP |
1159 | |
1160 | if (s->seat) | |
cc377381 LP |
1161 | seat_send_changed(s->seat, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); |
1162 | ||
1163 | user_send_changed(s->user, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
1164 | manager_send_changed(s->manager, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL); | |
be2bb14f LP |
1165 | |
1166 | return 1; | |
cc377381 LP |
1167 | } |
1168 | ||
42d35e13 VT |
1169 | int session_get_locked_hint(Session *s) { |
1170 | assert(s); | |
1171 | ||
1172 | return s->locked_hint; | |
1173 | } | |
1174 | ||
b4f01bc1 | 1175 | int session_set_locked_hint(Session *s, bool b) { |
42d35e13 VT |
1176 | assert(s); |
1177 | ||
b4f01bc1 LP |
1178 | if (!SESSION_CLASS_CAN_LOCK(s->class)) |
1179 | return -ENOTTY; | |
1180 | ||
42d35e13 | 1181 | if (s->locked_hint == b) |
b4f01bc1 | 1182 | return 0; |
42d35e13 VT |
1183 | |
1184 | s->locked_hint = b; | |
b4f01bc1 LP |
1185 | (void) session_save(s); |
1186 | (void) session_send_changed(s, "LockedHint", NULL); | |
42d35e13 | 1187 | |
b4f01bc1 | 1188 | return 1; |
42d35e13 VT |
1189 | } |
1190 | ||
db72aea4 CH |
1191 | void session_set_type(Session *s, SessionType t) { |
1192 | assert(s); | |
1193 | ||
1194 | if (s->type == t) | |
1195 | return; | |
1196 | ||
1197 | s->type = t; | |
5157b0d8 LP |
1198 | (void) session_save(s); |
1199 | (void) session_send_changed(s, "Type", NULL); | |
db72aea4 CH |
1200 | } |
1201 | ||
6e9bf0ad LP |
1202 | void session_set_class(Session *s, SessionClass c) { |
1203 | assert(s); | |
1204 | ||
1205 | if (s->class == c) | |
1206 | return; | |
1207 | ||
1208 | s->class = c; | |
1209 | (void) session_save(s); | |
1210 | (void) session_send_changed(s, "Class", NULL); | |
1211 | ||
e2a42c0c MY |
1212 | /* This class change might mean we need the per-user session manager now. Try to start it. */ |
1213 | (void) user_start_service_manager(s->user); | |
6e9bf0ad LP |
1214 | } |
1215 | ||
4885d749 DT |
1216 | int session_set_display(Session *s, const char *display) { |
1217 | int r; | |
1218 | ||
1219 | assert(s); | |
1220 | assert(display); | |
1221 | ||
4885d749 | 1222 | r = free_and_strdup(&s->display, display); |
e5c09aad | 1223 | if (r <= 0) /* 0 means the strings were equal */ |
4885d749 DT |
1224 | return r; |
1225 | ||
5157b0d8 LP |
1226 | (void) session_save(s); |
1227 | (void) session_send_changed(s, "Display", NULL); | |
4885d749 DT |
1228 | |
1229 | return 1; | |
1230 | } | |
1231 | ||
092e6cd1 TK |
1232 | int session_set_tty(Session *s, const char *tty) { |
1233 | int r; | |
1234 | ||
1235 | assert(s); | |
1236 | assert(tty); | |
1237 | ||
1238 | r = free_and_strdup(&s->tty, tty); | |
1239 | if (r <= 0) /* 0 means the strings were equal */ | |
1240 | return r; | |
1241 | ||
5157b0d8 LP |
1242 | (void) session_save(s); |
1243 | (void) session_send_changed(s, "TTY", NULL); | |
092e6cd1 TK |
1244 | |
1245 | return 1; | |
1246 | } | |
1247 | ||
cc377381 | 1248 | static int session_dispatch_fifo(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
99534007 | 1249 | Session *s = ASSERT_PTR(userdata); |
cc377381 | 1250 | |
cc377381 LP |
1251 | assert(s->fifo_fd == fd); |
1252 | ||
1253 | /* EOF on the FIFO means the session died abnormally. */ | |
1254 | ||
1255 | session_remove_fifo(s); | |
bda62573 | 1256 | session_stop(s, /* force = */ false); |
cc377381 LP |
1257 | |
1258 | return 1; | |
bef422ae LP |
1259 | } |
1260 | ||
932e3ee7 LP |
1261 | int session_create_fifo(Session *s) { |
1262 | int r; | |
1263 | ||
31b79c2b LP |
1264 | assert(s); |
1265 | ||
b4f78aea | 1266 | /* Create FIFO */ |
932e3ee7 | 1267 | if (!s->fifo_path) { |
37c1d5e9 | 1268 | r = mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0, MKDIR_WARN_MODE); |
e6061ab2 LP |
1269 | if (r < 0) |
1270 | return r; | |
1271 | ||
d5ddc930 LP |
1272 | s->fifo_path = strjoin("/run/systemd/sessions/", s->id, ".ref"); |
1273 | if (!s->fifo_path) | |
932e3ee7 | 1274 | return -ENOMEM; |
31b79c2b | 1275 | |
932e3ee7 LP |
1276 | if (mkfifo(s->fifo_path, 0600) < 0 && errno != EEXIST) |
1277 | return -errno; | |
1278 | } | |
31b79c2b | 1279 | |
932e3ee7 | 1280 | /* Open reading side */ |
b4f78aea | 1281 | if (s->fifo_fd < 0) { |
db4a47e9 | 1282 | s->fifo_fd = open(s->fifo_path, O_RDONLY|O_CLOEXEC|O_NONBLOCK); |
b4f78aea LP |
1283 | if (s->fifo_fd < 0) |
1284 | return -errno; | |
cc377381 LP |
1285 | } |
1286 | ||
1287 | if (!s->fifo_event_source) { | |
151b9b96 | 1288 | r = sd_event_add_io(s->manager->event, &s->fifo_event_source, s->fifo_fd, 0, session_dispatch_fifo, s); |
b4f78aea LP |
1289 | if (r < 0) |
1290 | return r; | |
1291 | ||
6c75e317 ZJS |
1292 | /* Let's make sure we noticed dead sessions before we process new bus requests (which might |
1293 | * create new sessions). */ | |
e11544a8 | 1294 | r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_NORMAL-10); |
cc377381 LP |
1295 | if (r < 0) |
1296 | return r; | |
b4f78aea | 1297 | } |
932e3ee7 LP |
1298 | |
1299 | /* Open writing side */ | |
7c248223 | 1300 | return RET_NERRNO(open(s->fifo_path, O_WRONLY|O_CLOEXEC|O_NONBLOCK)); |
932e3ee7 LP |
1301 | } |
1302 | ||
5f41d1f1 | 1303 | static void session_remove_fifo(Session *s) { |
932e3ee7 LP |
1304 | assert(s); |
1305 | ||
03e334a1 LP |
1306 | s->fifo_event_source = sd_event_source_unref(s->fifo_event_source); |
1307 | s->fifo_fd = safe_close(s->fifo_fd); | |
489f67b4 | 1308 | s->fifo_path = unlink_and_free(s->fifo_path); |
31b79c2b LP |
1309 | } |
1310 | ||
5c093a23 | 1311 | bool session_may_gc(Session *s, bool drop_not_started) { |
bd26aee1 LP |
1312 | int r; |
1313 | ||
20263082 LP |
1314 | assert(s); |
1315 | ||
4a4b033f | 1316 | if (drop_not_started && !s->started) |
5c093a23 | 1317 | return true; |
932e3ee7 | 1318 | |
9444b1f2 | 1319 | if (!s->user) |
5c093a23 | 1320 | return true; |
9444b1f2 | 1321 | |
76f2191d | 1322 | r = pidref_is_alive(&s->leader); |
9d5b6901 MY |
1323 | if (r == -ESRCH) |
1324 | /* Session has no leader. This is probably because the leader vanished before deserializing | |
1325 | * pidfd from FD store. */ | |
1326 | return true; | |
76f2191d | 1327 | if (r < 0) |
9d5b6901 | 1328 | log_debug_errno(r, "Unable to determine if leader PID " PID_FMT " is still alive, assuming not: %m", s->leader.pid); |
76f2191d MS |
1329 | if (r > 0) |
1330 | return false; | |
1331 | ||
9d5b6901 MY |
1332 | if (s->fifo_fd >= 0 && pipe_eof(s->fifo_fd) <= 0) |
1333 | return false; | |
20263082 | 1334 | |
bd26aee1 LP |
1335 | if (s->scope_job) { |
1336 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
1337 | ||
1338 | r = manager_job_is_active(s->manager, s->scope_job, &error); | |
1339 | if (r < 0) | |
1340 | log_debug_errno(r, "Failed to determine whether job '%s' is pending, ignoring: %s", s->scope_job, bus_error_message(&error, r)); | |
1341 | if (r != 0) | |
1342 | return false; | |
1343 | } | |
20263082 | 1344 | |
bd26aee1 LP |
1345 | if (s->scope) { |
1346 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
1347 | ||
1348 | r = manager_unit_is_active(s->manager, s->scope, &error); | |
1349 | if (r < 0) | |
1350 | log_debug_errno(r, "Failed to determine whether unit '%s' is active, ignoring: %s", s->scope, bus_error_message(&error, r)); | |
1351 | if (r != 0) | |
1352 | return false; | |
1353 | } | |
20263082 | 1354 | |
5c093a23 | 1355 | return true; |
20263082 LP |
1356 | } |
1357 | ||
14c3baca LP |
1358 | void session_add_to_gc_queue(Session *s) { |
1359 | assert(s); | |
1360 | ||
1361 | if (s->in_gc_queue) | |
1362 | return; | |
1363 | ||
71fda00f | 1364 | LIST_PREPEND(gc_queue, s->manager->session_gc_queue, s); |
14c3baca LP |
1365 | s->in_gc_queue = true; |
1366 | } | |
1367 | ||
0604381b LP |
1368 | SessionState session_get_state(Session *s) { |
1369 | assert(s); | |
1370 | ||
8fe63cd4 | 1371 | /* always check closing first */ |
5f41d1f1 LP |
1372 | if (s->stopping || s->timer_event_source) |
1373 | return SESSION_CLOSING; | |
1374 | ||
76f2191d | 1375 | if (s->scope_job || (!pidref_is_set(&s->leader) && s->fifo_fd < 0)) |
405e0255 | 1376 | return SESSION_OPENING; |
fb6becb4 | 1377 | |
0604381b LP |
1378 | if (session_is_active(s)) |
1379 | return SESSION_ACTIVE; | |
1380 | ||
1381 | return SESSION_ONLINE; | |
1382 | } | |
1383 | ||
de07ab16 | 1384 | int session_kill(Session *s, KillWho who, int signo) { |
de07ab16 LP |
1385 | assert(s); |
1386 | ||
fb6becb4 | 1387 | if (!s->scope) |
de07ab16 LP |
1388 | return -ESRCH; |
1389 | ||
fb6becb4 | 1390 | return manager_kill_unit(s->manager, s->scope, who, signo, NULL); |
de07ab16 LP |
1391 | } |
1392 | ||
93041c60 MY |
1393 | static int session_open_vt(Session *s, bool reopen) { |
1394 | _cleanup_close_ int fd = -EBADF; | |
5f41d1f1 | 1395 | char path[sizeof("/dev/tty") + DECIMAL_STR_MAX(s->vtnr)]; |
90a18413 | 1396 | |
a8d5378a MY |
1397 | assert(s); |
1398 | ||
baccf3e4 OB |
1399 | if (s->vtnr < 1) |
1400 | return -ENODEV; | |
90a18413 | 1401 | |
93041c60 | 1402 | if (!reopen && s->vtfd >= 0) |
90a18413 DH |
1403 | return s->vtfd; |
1404 | ||
92bd5ff3 | 1405 | sprintf(path, "/dev/tty%u", s->vtnr); |
90a18413 | 1406 | |
93041c60 MY |
1407 | fd = open_terminal(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY); |
1408 | if (fd < 0) | |
1409 | return log_error_errno(fd, "Cannot open VT %s of session %s: %m", path, s->id); | |
1410 | ||
1411 | close_and_replace(s->vtfd, fd); | |
90a18413 DH |
1412 | return s->vtfd; |
1413 | } | |
1414 | ||
a03cdb17 | 1415 | static int session_prepare_vt(Session *s) { |
90a18413 | 1416 | int vt, r; |
9fb2c8b8 | 1417 | struct vt_mode mode = {}; |
90a18413 | 1418 | |
a8d5378a MY |
1419 | assert(s); |
1420 | ||
baccf3e4 OB |
1421 | if (s->vtnr < 1) |
1422 | return 0; | |
1423 | ||
93041c60 | 1424 | vt = session_open_vt(s, /* reopen = */ false); |
90a18413 | 1425 | if (vt < 0) |
baccf3e4 | 1426 | return vt; |
90a18413 | 1427 | |
22c902fa | 1428 | r = fchown(vt, s->user->user_record->uid, -1); |
baccf3e4 | 1429 | if (r < 0) { |
94c156cd LP |
1430 | r = log_error_errno(errno, |
1431 | "Cannot change owner of /dev/tty%u: %m", | |
1432 | s->vtnr); | |
d6176c6c | 1433 | goto error; |
baccf3e4 | 1434 | } |
d6176c6c | 1435 | |
90a18413 | 1436 | r = ioctl(vt, KDSKBMODE, K_OFF); |
baccf3e4 | 1437 | if (r < 0) { |
94c156cd LP |
1438 | r = log_error_errno(errno, |
1439 | "Cannot set K_OFF on /dev/tty%u: %m", | |
1440 | s->vtnr); | |
90a18413 | 1441 | goto error; |
baccf3e4 | 1442 | } |
90a18413 DH |
1443 | |
1444 | r = ioctl(vt, KDSETMODE, KD_GRAPHICS); | |
baccf3e4 | 1445 | if (r < 0) { |
94c156cd LP |
1446 | r = log_error_errno(errno, |
1447 | "Cannot set KD_GRAPHICS on /dev/tty%u: %m", | |
1448 | s->vtnr); | |
90a18413 | 1449 | goto error; |
baccf3e4 | 1450 | } |
90a18413 | 1451 | |
90a18413 DH |
1452 | /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS. |
1453 | * So we need a dummy handler here which just acknowledges *all* VT | |
1454 | * switch requests. */ | |
1455 | mode.mode = VT_PROCESS; | |
92683ad2 DH |
1456 | mode.relsig = SIGRTMIN; |
1457 | mode.acqsig = SIGRTMIN + 1; | |
90a18413 | 1458 | r = ioctl(vt, VT_SETMODE, &mode); |
baccf3e4 | 1459 | if (r < 0) { |
94c156cd LP |
1460 | r = log_error_errno(errno, |
1461 | "Cannot set VT_PROCESS on /dev/tty%u: %m", | |
1462 | s->vtnr); | |
90a18413 | 1463 | goto error; |
baccf3e4 | 1464 | } |
90a18413 | 1465 | |
baccf3e4 | 1466 | return 0; |
90a18413 DH |
1467 | |
1468 | error: | |
90a18413 | 1469 | session_restore_vt(s); |
baccf3e4 | 1470 | return r; |
90a18413 DH |
1471 | } |
1472 | ||
0212126c | 1473 | static void session_restore_vt(Session *s) { |
8246905a | 1474 | int r; |
128df4cf | 1475 | |
a8d5378a MY |
1476 | assert(s); |
1477 | ||
092e6cd1 TK |
1478 | if (s->vtfd < 0) |
1479 | return; | |
1480 | ||
8246905a FB |
1481 | r = vt_restore(s->vtfd); |
1482 | if (r == -EIO) { | |
8246905a FB |
1483 | /* It might happen if the controlling process exited before or while we were |
1484 | * restoring the VT as it would leave the old file-descriptor in a hung-up | |
1485 | * state. In this case let's retry with a fresh handle to the virtual terminal. */ | |
ad96887a | 1486 | |
8246905a FB |
1487 | /* We do a little dance to avoid having the terminal be available |
1488 | * for reuse before we've cleaned it up. */ | |
8246905a | 1489 | |
93041c60 MY |
1490 | int fd = session_open_vt(s, /* reopen = */ true); |
1491 | if (fd >= 0) | |
1492 | r = vt_restore(fd); | |
8246905a | 1493 | } |
c0f34168 FB |
1494 | if (r < 0) |
1495 | log_warning_errno(r, "Failed to restore VT, ignoring: %m"); | |
d6176c6c | 1496 | |
03e334a1 | 1497 | s->vtfd = safe_close(s->vtfd); |
90a18413 DH |
1498 | } |
1499 | ||
2ec3ff66 | 1500 | void session_leave_vt(Session *s) { |
ce540a24 DH |
1501 | int r; |
1502 | ||
2ec3ff66 DH |
1503 | assert(s); |
1504 | ||
1505 | /* This is called whenever we get a VT-switch signal from the kernel. | |
1506 | * We acknowledge all of them unconditionally. Note that session are | |
1507 | * free to overwrite those handlers and we only register them for | |
1508 | * sessions with controllers. Legacy sessions are not affected. | |
1509 | * However, if we switch from a non-legacy to a legacy session, we must | |
1510 | * make sure to pause all device before acknowledging the switch. We | |
1511 | * process the real switch only after we are notified via sysfs, so the | |
1512 | * legacy session might have already started using the devices. If we | |
1513 | * don't pause the devices before the switch, we might confuse the | |
1514 | * session we switch to. */ | |
1515 | ||
1516 | if (s->vtfd < 0) | |
1517 | return; | |
1518 | ||
1519 | session_device_pause_all(s); | |
93041c60 | 1520 | r = vt_release(s->vtfd, /* restore = */ false); |
99d4ad71 | 1521 | if (r == -EIO) { |
93041c60 | 1522 | /* Handle the same VT hung-up case as in session_restore_vt */ |
99d4ad71 | 1523 | |
93041c60 MY |
1524 | int fd = session_open_vt(s, /* reopen = */ true); |
1525 | if (fd >= 0) | |
1526 | r = vt_release(fd, /* restore = */ false); | |
99d4ad71 | 1527 | } |
ce540a24 | 1528 | if (r < 0) |
27dafac9 | 1529 | log_debug_errno(r, "Cannot release VT of session %s: %m", s->id); |
2ec3ff66 DH |
1530 | } |
1531 | ||
cc377381 | 1532 | bool session_is_controller(Session *s, const char *sender) { |
e5c09aad | 1533 | return streq_ptr(ASSERT_PTR(s)->controller, sender); |
ae5e06bd DH |
1534 | } |
1535 | ||
b12e5615 | 1536 | static void session_release_controller(Session *s, bool notify) { |
d7ac0952 | 1537 | _unused_ _cleanup_free_ char *name = NULL; |
6d33772f DH |
1538 | SessionDevice *sd; |
1539 | ||
a8d5378a MY |
1540 | assert(s); |
1541 | ||
b12e5615 DH |
1542 | if (!s->controller) |
1543 | return; | |
6d33772f | 1544 | |
b12e5615 | 1545 | name = s->controller; |
90a18413 | 1546 | |
6c75e317 ZJS |
1547 | /* By resetting the controller before releasing the devices, we won't send notification signals. |
1548 | * This avoids sending useless notifications if the controller is released on disconnects. */ | |
b12e5615 DH |
1549 | if (!notify) |
1550 | s->controller = NULL; | |
6d33772f | 1551 | |
b12e5615 DH |
1552 | while ((sd = hashmap_first(s->devices))) |
1553 | session_device_free(sd); | |
1554 | ||
1555 | s->controller = NULL; | |
3cde9e8f DM |
1556 | s->track = sd_bus_track_unref(s->track); |
1557 | } | |
1558 | ||
1559 | static int on_bus_track(sd_bus_track *track, void *userdata) { | |
99534007 | 1560 | Session *s = ASSERT_PTR(userdata); |
3cde9e8f DM |
1561 | |
1562 | assert(track); | |
3cde9e8f DM |
1563 | |
1564 | session_drop_controller(s); | |
1565 | ||
1566 | return 0; | |
6d33772f DH |
1567 | } |
1568 | ||
dc6284e9 | 1569 | int session_set_controller(Session *s, const char *sender, bool force, bool prepare) { |
b12e5615 | 1570 | _cleanup_free_ char *name = NULL; |
ae5e06bd DH |
1571 | int r; |
1572 | ||
1573 | assert(s); | |
1574 | assert(sender); | |
1575 | ||
1576 | if (session_is_controller(s, sender)) | |
1577 | return 0; | |
1578 | if (s->controller && !force) | |
1579 | return -EBUSY; | |
1580 | ||
b12e5615 DH |
1581 | name = strdup(sender); |
1582 | if (!name) | |
ae5e06bd DH |
1583 | return -ENOMEM; |
1584 | ||
3cde9e8f DM |
1585 | s->track = sd_bus_track_unref(s->track); |
1586 | r = sd_bus_track_new(s->manager->bus, &s->track, on_bus_track, s); | |
1587 | if (r < 0) | |
1588 | return r; | |
1589 | ||
1590 | r = sd_bus_track_add_name(s->track, name); | |
1591 | if (r < 0) | |
ae5e06bd | 1592 | return r; |
ae5e06bd | 1593 | |
90a18413 DH |
1594 | /* When setting a session controller, we forcibly mute the VT and set |
1595 | * it into graphics-mode. Applications can override that by changing | |
1596 | * VT state after calling TakeControl(). However, this serves as a good | |
1597 | * default and well-behaving controllers can now ignore VTs entirely. | |
1598 | * Note that we reset the VT on ReleaseControl() and if the controller | |
1599 | * exits. | |
1600 | * If logind crashes/restarts, we restore the controller during restart | |
dc6284e9 FB |
1601 | * (without preparing the VT since the controller has probably overridden |
1602 | * VT state by now) or reset the VT in case it crashed/exited, too. */ | |
1603 | if (prepare) { | |
1604 | r = session_prepare_vt(s); | |
1605 | if (r < 0) { | |
1606 | s->track = sd_bus_track_unref(s->track); | |
1607 | return r; | |
1608 | } | |
13f493dc | 1609 | } |
baccf3e4 | 1610 | |
b12e5615 | 1611 | session_release_controller(s, true); |
ae2a15bc | 1612 | s->controller = TAKE_PTR(name); |
5157b0d8 | 1613 | (void) session_save(s); |
90a18413 | 1614 | |
ae5e06bd DH |
1615 | return 0; |
1616 | } | |
1617 | ||
1618 | void session_drop_controller(Session *s) { | |
1619 | assert(s); | |
1620 | ||
1621 | if (!s->controller) | |
1622 | return; | |
1623 | ||
3cde9e8f | 1624 | s->track = sd_bus_track_unref(s->track); |
db72aea4 | 1625 | session_set_type(s, s->original_type); |
b12e5615 | 1626 | session_release_controller(s, false); |
5157b0d8 | 1627 | (void) session_save(s); |
b12e5615 | 1628 | session_restore_vt(s); |
ae5e06bd DH |
1629 | } |
1630 | ||
fb6becb4 LP |
1631 | static const char* const session_state_table[_SESSION_STATE_MAX] = { |
1632 | [SESSION_OPENING] = "opening", | |
6c75e317 ZJS |
1633 | [SESSION_ONLINE] = "online", |
1634 | [SESSION_ACTIVE] = "active", | |
1635 | [SESSION_CLOSING] = "closing", | |
0604381b LP |
1636 | }; |
1637 | ||
1638 | DEFINE_STRING_TABLE_LOOKUP(session_state, SessionState); | |
1639 | ||
20263082 | 1640 | static const char* const session_type_table[_SESSION_TYPE_MAX] = { |
2c5859af | 1641 | [SESSION_UNSPECIFIED] = "unspecified", |
6c75e317 ZJS |
1642 | [SESSION_TTY] = "tty", |
1643 | [SESSION_X11] = "x11", | |
1644 | [SESSION_WAYLAND] = "wayland", | |
1645 | [SESSION_MIR] = "mir", | |
1646 | [SESSION_WEB] = "web", | |
20263082 LP |
1647 | }; |
1648 | ||
1649 | DEFINE_STRING_TABLE_LOOKUP(session_type, SessionType); | |
de07ab16 | 1650 | |
55efac6c | 1651 | static const char* const session_class_table[_SESSION_CLASS_MAX] = { |
b5100c73 LP |
1652 | [SESSION_USER] = "user", |
1653 | [SESSION_USER_EARLY] = "user-early", | |
53ebde6d | 1654 | [SESSION_USER_INCOMPLETE] = "user-incomplete", |
b5100c73 LP |
1655 | [SESSION_GREETER] = "greeter", |
1656 | [SESSION_LOCK_SCREEN] = "lock-screen", | |
1657 | [SESSION_BACKGROUND] = "background", | |
1658 | [SESSION_BACKGROUND_LIGHT] = "background-light", | |
1659 | [SESSION_MANAGER] = "manager", | |
1660 | [SESSION_MANAGER_EARLY] = "manager-early", | |
55efac6c LP |
1661 | }; |
1662 | ||
1663 | DEFINE_STRING_TABLE_LOOKUP(session_class, SessionClass); | |
1664 | ||
de07ab16 LP |
1665 | static const char* const kill_who_table[_KILL_WHO_MAX] = { |
1666 | [KILL_LEADER] = "leader", | |
6c75e317 | 1667 | [KILL_ALL] = "all", |
de07ab16 LP |
1668 | }; |
1669 | ||
1670 | DEFINE_STRING_TABLE_LOOKUP(kill_who, KillWho); | |
3d0ef5c7 LP |
1671 | |
1672 | static const char* const tty_validity_table[_TTY_VALIDITY_MAX] = { | |
6c75e317 ZJS |
1673 | [TTY_FROM_PAM] = "from-pam", |
1674 | [TTY_FROM_UTMP] = "from-utmp", | |
3d0ef5c7 LP |
1675 | [TTY_UTMP_INCONSISTENT] = "utmp-inconsistent", |
1676 | }; | |
1677 | ||
1678 | DEFINE_STRING_TABLE_LOOKUP(tty_validity, TTYValidity); |