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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | ||
3 | #include <errno.h> | |
4 | ||
5 | #include "alloc-util.h" | |
6 | #include "bus-common-errors.h" | |
7 | #include "bus-label.h" | |
8 | #include "bus-polkit.h" | |
9 | #include "bus-util.h" | |
10 | #include "fd-util.h" | |
11 | #include "logind-brightness.h" | |
12 | #include "logind-dbus.h" | |
13 | #include "logind-seat-dbus.h" | |
14 | #include "logind-session-dbus.h" | |
15 | #include "logind-session-device.h" | |
16 | #include "logind-session.h" | |
17 | #include "logind-user-dbus.h" | |
18 | #include "logind.h" | |
19 | #include "missing_capability.h" | |
20 | #include "path-util.h" | |
21 | #include "signal-util.h" | |
22 | #include "stat-util.h" | |
23 | #include "strv.h" | |
24 | #include "user-util.h" | |
25 | #include "util.h" | |
26 | ||
27 | static int property_get_user( | |
28 | sd_bus *bus, | |
29 | const char *path, | |
30 | const char *interface, | |
31 | const char *property, | |
32 | sd_bus_message *reply, | |
33 | void *userdata, | |
34 | sd_bus_error *error) { | |
35 | ||
36 | _cleanup_free_ char *p = NULL; | |
37 | Session *s = userdata; | |
38 | ||
39 | assert(bus); | |
40 | assert(reply); | |
41 | assert(s); | |
42 | ||
43 | p = user_bus_path(s->user); | |
44 | if (!p) | |
45 | return -ENOMEM; | |
46 | ||
47 | return sd_bus_message_append(reply, "(uo)", (uint32_t) s->user->user_record->uid, p); | |
48 | } | |
49 | ||
50 | static int property_get_name( | |
51 | sd_bus *bus, | |
52 | const char *path, | |
53 | const char *interface, | |
54 | const char *property, | |
55 | sd_bus_message *reply, | |
56 | void *userdata, | |
57 | sd_bus_error *error) { | |
58 | ||
59 | Session *s = userdata; | |
60 | ||
61 | assert(bus); | |
62 | assert(reply); | |
63 | assert(s); | |
64 | ||
65 | return sd_bus_message_append(reply, "s", s->user->user_record->user_name); | |
66 | } | |
67 | ||
68 | static int property_get_seat( | |
69 | sd_bus *bus, | |
70 | const char *path, | |
71 | const char *interface, | |
72 | const char *property, | |
73 | sd_bus_message *reply, | |
74 | void *userdata, | |
75 | sd_bus_error *error) { | |
76 | ||
77 | _cleanup_free_ char *p = NULL; | |
78 | Session *s = userdata; | |
79 | ||
80 | assert(bus); | |
81 | assert(reply); | |
82 | assert(s); | |
83 | ||
84 | p = s->seat ? seat_bus_path(s->seat) : strdup("/"); | |
85 | if (!p) | |
86 | return -ENOMEM; | |
87 | ||
88 | return sd_bus_message_append(reply, "(so)", s->seat ? s->seat->id : "", p); | |
89 | } | |
90 | ||
91 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, session_type, SessionType); | |
92 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_class, session_class, SessionClass); | |
93 | static BUS_DEFINE_PROPERTY_GET(property_get_active, "b", Session, session_is_active); | |
94 | static BUS_DEFINE_PROPERTY_GET2(property_get_state, "s", Session, session_get_state, session_state_to_string); | |
95 | ||
96 | static int property_get_idle_hint( | |
97 | sd_bus *bus, | |
98 | const char *path, | |
99 | const char *interface, | |
100 | const char *property, | |
101 | sd_bus_message *reply, | |
102 | void *userdata, | |
103 | sd_bus_error *error) { | |
104 | ||
105 | Session *s = userdata; | |
106 | ||
107 | assert(bus); | |
108 | assert(reply); | |
109 | assert(s); | |
110 | ||
111 | return sd_bus_message_append(reply, "b", session_get_idle_hint(s, NULL) > 0); | |
112 | } | |
113 | ||
114 | static int property_get_idle_since_hint( | |
115 | sd_bus *bus, | |
116 | const char *path, | |
117 | const char *interface, | |
118 | const char *property, | |
119 | sd_bus_message *reply, | |
120 | void *userdata, | |
121 | sd_bus_error *error) { | |
122 | ||
123 | Session *s = userdata; | |
124 | dual_timestamp t = DUAL_TIMESTAMP_NULL; | |
125 | uint64_t u; | |
126 | int r; | |
127 | ||
128 | assert(bus); | |
129 | assert(reply); | |
130 | assert(s); | |
131 | ||
132 | r = session_get_idle_hint(s, &t); | |
133 | if (r < 0) | |
134 | return r; | |
135 | ||
136 | u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; | |
137 | ||
138 | return sd_bus_message_append(reply, "t", u); | |
139 | } | |
140 | ||
141 | static int property_get_locked_hint( | |
142 | sd_bus *bus, | |
143 | const char *path, | |
144 | const char *interface, | |
145 | const char *property, | |
146 | sd_bus_message *reply, | |
147 | void *userdata, | |
148 | sd_bus_error *error) { | |
149 | ||
150 | Session *s = userdata; | |
151 | ||
152 | assert(bus); | |
153 | assert(reply); | |
154 | assert(s); | |
155 | ||
156 | return sd_bus_message_append(reply, "b", session_get_locked_hint(s) > 0); | |
157 | } | |
158 | ||
159 | int bus_session_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
160 | Session *s = userdata; | |
161 | int r; | |
162 | ||
163 | assert(message); | |
164 | assert(s); | |
165 | ||
166 | r = bus_verify_polkit_async( | |
167 | message, | |
168 | CAP_KILL, | |
169 | "org.freedesktop.login1.manage", | |
170 | NULL, | |
171 | false, | |
172 | s->user->user_record->uid, | |
173 | &s->manager->polkit_registry, | |
174 | error); | |
175 | if (r < 0) | |
176 | return r; | |
177 | if (r == 0) | |
178 | return 1; /* Will call us back */ | |
179 | ||
180 | r = session_stop(s, true); | |
181 | if (r < 0) | |
182 | return r; | |
183 | ||
184 | return sd_bus_reply_method_return(message, NULL); | |
185 | } | |
186 | ||
187 | int bus_session_method_activate(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
188 | Session *s = userdata; | |
189 | int r; | |
190 | ||
191 | assert(message); | |
192 | assert(s); | |
193 | ||
194 | r = session_activate(s); | |
195 | if (r < 0) | |
196 | return r; | |
197 | ||
198 | return sd_bus_reply_method_return(message, NULL); | |
199 | } | |
200 | ||
201 | int bus_session_method_lock(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
202 | Session *s = userdata; | |
203 | int r; | |
204 | ||
205 | assert(message); | |
206 | assert(s); | |
207 | ||
208 | r = bus_verify_polkit_async( | |
209 | message, | |
210 | CAP_SYS_ADMIN, | |
211 | "org.freedesktop.login1.lock-sessions", | |
212 | NULL, | |
213 | false, | |
214 | s->user->user_record->uid, | |
215 | &s->manager->polkit_registry, | |
216 | error); | |
217 | if (r < 0) | |
218 | return r; | |
219 | if (r == 0) | |
220 | return 1; /* Will call us back */ | |
221 | ||
222 | r = session_send_lock(s, strstr(sd_bus_message_get_member(message), "Lock")); | |
223 | if (r < 0) | |
224 | return r; | |
225 | ||
226 | return sd_bus_reply_method_return(message, NULL); | |
227 | } | |
228 | ||
229 | static int method_set_idle_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
230 | _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; | |
231 | Session *s = userdata; | |
232 | uid_t uid; | |
233 | int r, b; | |
234 | ||
235 | assert(message); | |
236 | assert(s); | |
237 | ||
238 | r = sd_bus_message_read(message, "b", &b); | |
239 | if (r < 0) | |
240 | return r; | |
241 | ||
242 | r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); | |
243 | if (r < 0) | |
244 | return r; | |
245 | ||
246 | r = sd_bus_creds_get_euid(creds, &uid); | |
247 | if (r < 0) | |
248 | return r; | |
249 | ||
250 | if (uid != 0 && uid != s->user->user_record->uid) | |
251 | return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set idle hint"); | |
252 | ||
253 | r = session_set_idle_hint(s, b); | |
254 | if (r == -ENOTTY) | |
255 | return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Idle hint control is not supported on non-graphical sessions."); | |
256 | if (r < 0) | |
257 | return r; | |
258 | ||
259 | return sd_bus_reply_method_return(message, NULL); | |
260 | } | |
261 | ||
262 | static int method_set_locked_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
263 | _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; | |
264 | Session *s = userdata; | |
265 | uid_t uid; | |
266 | int r, b; | |
267 | ||
268 | assert(message); | |
269 | assert(s); | |
270 | ||
271 | r = sd_bus_message_read(message, "b", &b); | |
272 | if (r < 0) | |
273 | return r; | |
274 | ||
275 | r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); | |
276 | if (r < 0) | |
277 | return r; | |
278 | ||
279 | r = sd_bus_creds_get_euid(creds, &uid); | |
280 | if (r < 0) | |
281 | return r; | |
282 | ||
283 | if (uid != 0 && uid != s->user->user_record->uid) | |
284 | return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set locked hint"); | |
285 | ||
286 | session_set_locked_hint(s, b); | |
287 | ||
288 | return sd_bus_reply_method_return(message, NULL); | |
289 | } | |
290 | ||
291 | int bus_session_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
292 | Session *s = userdata; | |
293 | const char *swho; | |
294 | int32_t signo; | |
295 | KillWho who; | |
296 | int r; | |
297 | ||
298 | assert(message); | |
299 | assert(s); | |
300 | ||
301 | r = sd_bus_message_read(message, "si", &swho, &signo); | |
302 | if (r < 0) | |
303 | return r; | |
304 | ||
305 | if (isempty(swho)) | |
306 | who = KILL_ALL; | |
307 | else { | |
308 | who = kill_who_from_string(swho); | |
309 | if (who < 0) | |
310 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid kill parameter '%s'", swho); | |
311 | } | |
312 | ||
313 | if (!SIGNAL_VALID(signo)) | |
314 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo); | |
315 | ||
316 | r = bus_verify_polkit_async( | |
317 | message, | |
318 | CAP_KILL, | |
319 | "org.freedesktop.login1.manage", | |
320 | NULL, | |
321 | false, | |
322 | s->user->user_record->uid, | |
323 | &s->manager->polkit_registry, | |
324 | error); | |
325 | if (r < 0) | |
326 | return r; | |
327 | if (r == 0) | |
328 | return 1; /* Will call us back */ | |
329 | ||
330 | r = session_kill(s, who, signo); | |
331 | if (r < 0) | |
332 | return r; | |
333 | ||
334 | return sd_bus_reply_method_return(message, NULL); | |
335 | } | |
336 | ||
337 | static int method_take_control(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
338 | _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; | |
339 | Session *s = userdata; | |
340 | int r, force; | |
341 | uid_t uid; | |
342 | ||
343 | assert(message); | |
344 | assert(s); | |
345 | ||
346 | r = sd_bus_message_read(message, "b", &force); | |
347 | if (r < 0) | |
348 | return r; | |
349 | ||
350 | r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); | |
351 | if (r < 0) | |
352 | return r; | |
353 | ||
354 | r = sd_bus_creds_get_euid(creds, &uid); | |
355 | if (r < 0) | |
356 | return r; | |
357 | ||
358 | if (uid != 0 && (force || uid != s->user->user_record->uid)) | |
359 | return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may take control"); | |
360 | ||
361 | r = session_set_controller(s, sd_bus_message_get_sender(message), force, true); | |
362 | if (r < 0) | |
363 | return r; | |
364 | ||
365 | return sd_bus_reply_method_return(message, NULL); | |
366 | } | |
367 | ||
368 | static int method_release_control(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
369 | Session *s = userdata; | |
370 | ||
371 | assert(message); | |
372 | assert(s); | |
373 | ||
374 | if (!session_is_controller(s, sd_bus_message_get_sender(message))) | |
375 | return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session"); | |
376 | ||
377 | session_drop_controller(s); | |
378 | ||
379 | return sd_bus_reply_method_return(message, NULL); | |
380 | } | |
381 | ||
382 | static int method_take_device(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
383 | Session *s = userdata; | |
384 | uint32_t major, minor; | |
385 | SessionDevice *sd; | |
386 | dev_t dev; | |
387 | int r; | |
388 | ||
389 | assert(message); | |
390 | assert(s); | |
391 | ||
392 | r = sd_bus_message_read(message, "uu", &major, &minor); | |
393 | if (r < 0) | |
394 | return r; | |
395 | ||
396 | if (!DEVICE_MAJOR_VALID(major) || !DEVICE_MINOR_VALID(minor)) | |
397 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Device major/minor is not valid."); | |
398 | ||
399 | if (!session_is_controller(s, sd_bus_message_get_sender(message))) | |
400 | return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session"); | |
401 | ||
402 | dev = makedev(major, minor); | |
403 | sd = hashmap_get(s->devices, &dev); | |
404 | if (sd) | |
405 | /* We don't allow retrieving a device multiple times. | |
406 | * The related ReleaseDevice call is not ref-counted. | |
407 | * The caller should use dup() if it requires more | |
408 | * than one fd (it would be functionally | |
409 | * equivalent). */ | |
410 | return sd_bus_error_setf(error, BUS_ERROR_DEVICE_IS_TAKEN, "Device already taken"); | |
411 | ||
412 | r = session_device_new(s, dev, true, &sd); | |
413 | if (r < 0) | |
414 | return r; | |
415 | ||
416 | r = session_device_save(sd); | |
417 | if (r < 0) | |
418 | goto error; | |
419 | ||
420 | r = sd_bus_reply_method_return(message, "hb", sd->fd, !sd->active); | |
421 | if (r < 0) | |
422 | goto error; | |
423 | ||
424 | session_save(s); | |
425 | return 1; | |
426 | ||
427 | error: | |
428 | session_device_free(sd); | |
429 | return r; | |
430 | } | |
431 | ||
432 | static int method_release_device(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
433 | Session *s = userdata; | |
434 | uint32_t major, minor; | |
435 | SessionDevice *sd; | |
436 | dev_t dev; | |
437 | int r; | |
438 | ||
439 | assert(message); | |
440 | assert(s); | |
441 | ||
442 | r = sd_bus_message_read(message, "uu", &major, &minor); | |
443 | if (r < 0) | |
444 | return r; | |
445 | ||
446 | if (!DEVICE_MAJOR_VALID(major) || !DEVICE_MINOR_VALID(minor)) | |
447 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Device major/minor is not valid."); | |
448 | ||
449 | if (!session_is_controller(s, sd_bus_message_get_sender(message))) | |
450 | return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session"); | |
451 | ||
452 | dev = makedev(major, minor); | |
453 | sd = hashmap_get(s->devices, &dev); | |
454 | if (!sd) | |
455 | return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken"); | |
456 | ||
457 | session_device_free(sd); | |
458 | session_save(s); | |
459 | ||
460 | return sd_bus_reply_method_return(message, NULL); | |
461 | } | |
462 | ||
463 | static int method_pause_device_complete(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
464 | Session *s = userdata; | |
465 | uint32_t major, minor; | |
466 | SessionDevice *sd; | |
467 | dev_t dev; | |
468 | int r; | |
469 | ||
470 | assert(message); | |
471 | assert(s); | |
472 | ||
473 | r = sd_bus_message_read(message, "uu", &major, &minor); | |
474 | if (r < 0) | |
475 | return r; | |
476 | ||
477 | if (!DEVICE_MAJOR_VALID(major) || !DEVICE_MINOR_VALID(minor)) | |
478 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Device major/minor is not valid."); | |
479 | ||
480 | if (!session_is_controller(s, sd_bus_message_get_sender(message))) | |
481 | return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session"); | |
482 | ||
483 | dev = makedev(major, minor); | |
484 | sd = hashmap_get(s->devices, &dev); | |
485 | if (!sd) | |
486 | return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken"); | |
487 | ||
488 | session_device_complete_pause(sd); | |
489 | ||
490 | return sd_bus_reply_method_return(message, NULL); | |
491 | } | |
492 | ||
493 | static int method_set_brightness(sd_bus_message *message, void *userdata, sd_bus_error *error) { | |
494 | _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; | |
495 | _cleanup_(sd_device_unrefp) sd_device *d = NULL; | |
496 | const char *subsystem, *name, *seat; | |
497 | Session *s = userdata; | |
498 | uint32_t brightness; | |
499 | uid_t uid; | |
500 | int r; | |
501 | ||
502 | assert(message); | |
503 | assert(s); | |
504 | ||
505 | r = sd_bus_message_read(message, "ssu", &subsystem, &name, &brightness); | |
506 | if (r < 0) | |
507 | return r; | |
508 | ||
509 | if (!STR_IN_SET(subsystem, "backlight", "leds")) | |
510 | return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Subsystem type %s not supported, must be one of 'backlight' or 'leds'.", subsystem); | |
511 | if (!filename_is_valid(name)) | |
512 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Not a valid device name %s, refusing.", name); | |
513 | ||
514 | if (!s->seat) | |
515 | return sd_bus_error_setf(error, BUS_ERROR_NOT_YOUR_DEVICE, "Your session has no seat, refusing."); | |
516 | if (s->seat->active != s) | |
517 | return sd_bus_error_setf(error, BUS_ERROR_NOT_YOUR_DEVICE, "Session is not in foreground, refusing."); | |
518 | ||
519 | r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); | |
520 | if (r < 0) | |
521 | return r; | |
522 | ||
523 | r = sd_bus_creds_get_euid(creds, &uid); | |
524 | if (r < 0) | |
525 | return r; | |
526 | ||
527 | if (uid != 0 && uid != s->user->user_record->uid) | |
528 | return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may change brightness."); | |
529 | ||
530 | r = sd_device_new_from_subsystem_sysname(&d, subsystem, name); | |
531 | if (r < 0) | |
532 | return sd_bus_error_set_errnof(error, r, "Failed to open device %s:%s: %m", subsystem, name); | |
533 | ||
534 | if (sd_device_get_property_value(d, "ID_SEAT", &seat) >= 0 && !streq_ptr(seat, s->seat->id)) | |
535 | return sd_bus_error_setf(error, BUS_ERROR_NOT_YOUR_DEVICE, "Device %s:%s does not belong to your seat %s, refusing.", subsystem, name, s->seat->id); | |
536 | ||
537 | r = manager_write_brightness(s->manager, d, brightness, message); | |
538 | if (r < 0) | |
539 | return r; | |
540 | ||
541 | return 1; | |
542 | } | |
543 | ||
544 | const sd_bus_vtable session_vtable[] = { | |
545 | SD_BUS_VTABLE_START(0), | |
546 | ||
547 | SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Session, id), SD_BUS_VTABLE_PROPERTY_CONST), | |
548 | SD_BUS_PROPERTY("User", "(uo)", property_get_user, 0, SD_BUS_VTABLE_PROPERTY_CONST), | |
549 | SD_BUS_PROPERTY("Name", "s", property_get_name, 0, SD_BUS_VTABLE_PROPERTY_CONST), | |
550 | BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(Session, timestamp), SD_BUS_VTABLE_PROPERTY_CONST), | |
551 | SD_BUS_PROPERTY("VTNr", "u", NULL, offsetof(Session, vtnr), SD_BUS_VTABLE_PROPERTY_CONST), | |
552 | SD_BUS_PROPERTY("Seat", "(so)", property_get_seat, 0, SD_BUS_VTABLE_PROPERTY_CONST), | |
553 | SD_BUS_PROPERTY("TTY", "s", NULL, offsetof(Session, tty), SD_BUS_VTABLE_PROPERTY_CONST), | |
554 | SD_BUS_PROPERTY("Display", "s", NULL, offsetof(Session, display), SD_BUS_VTABLE_PROPERTY_CONST), | |
555 | SD_BUS_PROPERTY("Remote", "b", bus_property_get_bool, offsetof(Session, remote), SD_BUS_VTABLE_PROPERTY_CONST), | |
556 | SD_BUS_PROPERTY("RemoteHost", "s", NULL, offsetof(Session, remote_host), SD_BUS_VTABLE_PROPERTY_CONST), | |
557 | SD_BUS_PROPERTY("RemoteUser", "s", NULL, offsetof(Session, remote_user), SD_BUS_VTABLE_PROPERTY_CONST), | |
558 | SD_BUS_PROPERTY("Service", "s", NULL, offsetof(Session, service), SD_BUS_VTABLE_PROPERTY_CONST), | |
559 | SD_BUS_PROPERTY("Desktop", "s", NULL, offsetof(Session, desktop), SD_BUS_VTABLE_PROPERTY_CONST), | |
560 | SD_BUS_PROPERTY("Scope", "s", NULL, offsetof(Session, scope), SD_BUS_VTABLE_PROPERTY_CONST), | |
561 | SD_BUS_PROPERTY("Leader", "u", bus_property_get_pid, offsetof(Session, leader), SD_BUS_VTABLE_PROPERTY_CONST), | |
562 | SD_BUS_PROPERTY("Audit", "u", NULL, offsetof(Session, audit_id), SD_BUS_VTABLE_PROPERTY_CONST), | |
563 | SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Session, type), SD_BUS_VTABLE_PROPERTY_CONST), | |
564 | SD_BUS_PROPERTY("Class", "s", property_get_class, offsetof(Session, class), SD_BUS_VTABLE_PROPERTY_CONST), | |
565 | SD_BUS_PROPERTY("Active", "b", property_get_active, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), | |
566 | SD_BUS_PROPERTY("State", "s", property_get_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), | |
567 | SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), | |
568 | SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), | |
569 | SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), | |
570 | SD_BUS_PROPERTY("LockedHint", "b", property_get_locked_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), | |
571 | ||
572 | SD_BUS_METHOD("Terminate", NULL, NULL, bus_session_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED), | |
573 | SD_BUS_METHOD("Activate", NULL, NULL, bus_session_method_activate, SD_BUS_VTABLE_UNPRIVILEGED), | |
574 | SD_BUS_METHOD("Lock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED), | |
575 | SD_BUS_METHOD("Unlock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED), | |
576 | SD_BUS_METHOD("SetIdleHint", "b", NULL, method_set_idle_hint, SD_BUS_VTABLE_UNPRIVILEGED), | |
577 | SD_BUS_METHOD("SetLockedHint", "b", NULL, method_set_locked_hint, SD_BUS_VTABLE_UNPRIVILEGED), | |
578 | SD_BUS_METHOD("Kill", "si", NULL, bus_session_method_kill, SD_BUS_VTABLE_UNPRIVILEGED), | |
579 | SD_BUS_METHOD("TakeControl", "b", NULL, method_take_control, SD_BUS_VTABLE_UNPRIVILEGED), | |
580 | SD_BUS_METHOD("ReleaseControl", NULL, NULL, method_release_control, SD_BUS_VTABLE_UNPRIVILEGED), | |
581 | SD_BUS_METHOD("TakeDevice", "uu", "hb", method_take_device, SD_BUS_VTABLE_UNPRIVILEGED), | |
582 | SD_BUS_METHOD("ReleaseDevice", "uu", NULL, method_release_device, SD_BUS_VTABLE_UNPRIVILEGED), | |
583 | SD_BUS_METHOD("PauseDeviceComplete", "uu", NULL, method_pause_device_complete, SD_BUS_VTABLE_UNPRIVILEGED), | |
584 | SD_BUS_METHOD("SetBrightness", "ssu", NULL, method_set_brightness, SD_BUS_VTABLE_UNPRIVILEGED), | |
585 | ||
586 | SD_BUS_SIGNAL("PauseDevice", "uus", 0), | |
587 | SD_BUS_SIGNAL("ResumeDevice", "uuh", 0), | |
588 | SD_BUS_SIGNAL("Lock", NULL, 0), | |
589 | SD_BUS_SIGNAL("Unlock", NULL, 0), | |
590 | ||
591 | SD_BUS_VTABLE_END | |
592 | }; | |
593 | ||
594 | int session_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { | |
595 | _cleanup_free_ char *e = NULL; | |
596 | sd_bus_message *message; | |
597 | Manager *m = userdata; | |
598 | Session *session; | |
599 | const char *p; | |
600 | int r; | |
601 | ||
602 | assert(bus); | |
603 | assert(path); | |
604 | assert(interface); | |
605 | assert(found); | |
606 | assert(m); | |
607 | ||
608 | p = startswith(path, "/org/freedesktop/login1/session/"); | |
609 | if (!p) | |
610 | return 0; | |
611 | ||
612 | e = bus_label_unescape(p); | |
613 | if (!e) | |
614 | return -ENOMEM; | |
615 | ||
616 | message = sd_bus_get_current_message(bus); | |
617 | ||
618 | r = manager_get_session_from_creds(m, message, e, error, &session); | |
619 | if (r == -ENXIO) { | |
620 | sd_bus_error_free(error); | |
621 | return 0; | |
622 | } | |
623 | if (r < 0) | |
624 | return r; | |
625 | ||
626 | *found = session; | |
627 | return 1; | |
628 | } | |
629 | ||
630 | char *session_bus_path(Session *s) { | |
631 | _cleanup_free_ char *t = NULL; | |
632 | ||
633 | assert(s); | |
634 | ||
635 | t = bus_label_escape(s->id); | |
636 | if (!t) | |
637 | return NULL; | |
638 | ||
639 | return strjoin("/org/freedesktop/login1/session/", t); | |
640 | } | |
641 | ||
642 | int session_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { | |
643 | _cleanup_strv_free_ char **l = NULL; | |
644 | sd_bus_message *message; | |
645 | Manager *m = userdata; | |
646 | Session *session; | |
647 | Iterator i; | |
648 | int r; | |
649 | ||
650 | assert(bus); | |
651 | assert(path); | |
652 | assert(nodes); | |
653 | ||
654 | HASHMAP_FOREACH(session, m->sessions, i) { | |
655 | char *p; | |
656 | ||
657 | p = session_bus_path(session); | |
658 | if (!p) | |
659 | return -ENOMEM; | |
660 | ||
661 | r = strv_consume(&l, p); | |
662 | if (r < 0) | |
663 | return r; | |
664 | } | |
665 | ||
666 | message = sd_bus_get_current_message(bus); | |
667 | if (message) { | |
668 | _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; | |
669 | ||
670 | r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); | |
671 | if (r >= 0) { | |
672 | bool may_auto = false; | |
673 | const char *name; | |
674 | ||
675 | r = sd_bus_creds_get_session(creds, &name); | |
676 | if (r >= 0) { | |
677 | session = hashmap_get(m->sessions, name); | |
678 | if (session) { | |
679 | r = strv_extend(&l, "/org/freedesktop/login1/session/self"); | |
680 | if (r < 0) | |
681 | return r; | |
682 | ||
683 | may_auto = true; | |
684 | } | |
685 | } | |
686 | ||
687 | if (!may_auto) { | |
688 | uid_t uid; | |
689 | ||
690 | r = sd_bus_creds_get_owner_uid(creds, &uid); | |
691 | if (r >= 0) { | |
692 | User *user; | |
693 | ||
694 | user = hashmap_get(m->users, UID_TO_PTR(uid)); | |
695 | may_auto = user && user->display; | |
696 | } | |
697 | } | |
698 | ||
699 | if (may_auto) { | |
700 | r = strv_extend(&l, "/org/freedesktop/login1/session/auto"); | |
701 | if (r < 0) | |
702 | return r; | |
703 | } | |
704 | } | |
705 | } | |
706 | ||
707 | *nodes = TAKE_PTR(l); | |
708 | return 1; | |
709 | } | |
710 | ||
711 | int session_send_signal(Session *s, bool new_session) { | |
712 | _cleanup_free_ char *p = NULL; | |
713 | ||
714 | assert(s); | |
715 | ||
716 | p = session_bus_path(s); | |
717 | if (!p) | |
718 | return -ENOMEM; | |
719 | ||
720 | return sd_bus_emit_signal( | |
721 | s->manager->bus, | |
722 | "/org/freedesktop/login1", | |
723 | "org.freedesktop.login1.Manager", | |
724 | new_session ? "SessionNew" : "SessionRemoved", | |
725 | "so", s->id, p); | |
726 | } | |
727 | ||
728 | int session_send_changed(Session *s, const char *properties, ...) { | |
729 | _cleanup_free_ char *p = NULL; | |
730 | char **l; | |
731 | ||
732 | assert(s); | |
733 | ||
734 | if (!s->started) | |
735 | return 0; | |
736 | ||
737 | p = session_bus_path(s); | |
738 | if (!p) | |
739 | return -ENOMEM; | |
740 | ||
741 | l = strv_from_stdarg_alloca(properties); | |
742 | ||
743 | return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Session", l); | |
744 | } | |
745 | ||
746 | int session_send_lock(Session *s, bool lock) { | |
747 | _cleanup_free_ char *p = NULL; | |
748 | ||
749 | assert(s); | |
750 | ||
751 | p = session_bus_path(s); | |
752 | if (!p) | |
753 | return -ENOMEM; | |
754 | ||
755 | return sd_bus_emit_signal( | |
756 | s->manager->bus, | |
757 | p, | |
758 | "org.freedesktop.login1.Session", | |
759 | lock ? "Lock" : "Unlock", | |
760 | NULL); | |
761 | } | |
762 | ||
763 | int session_send_lock_all(Manager *m, bool lock) { | |
764 | Session *session; | |
765 | Iterator i; | |
766 | int r = 0; | |
767 | ||
768 | assert(m); | |
769 | ||
770 | HASHMAP_FOREACH(session, m->sessions, i) { | |
771 | int k; | |
772 | ||
773 | k = session_send_lock(session, lock); | |
774 | if (k < 0) | |
775 | r = k; | |
776 | } | |
777 | ||
778 | return r; | |
779 | } | |
780 | ||
781 | static bool session_ready(Session *s) { | |
782 | assert(s); | |
783 | ||
784 | /* Returns true when the session is ready, i.e. all jobs we enqueued for it are done (regardless if successful or not) */ | |
785 | ||
786 | return !s->scope_job && | |
787 | !s->user->service_job; | |
788 | } | |
789 | ||
790 | int session_send_create_reply(Session *s, sd_bus_error *error) { | |
791 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *c = NULL; | |
792 | _cleanup_close_ int fifo_fd = -1; | |
793 | _cleanup_free_ char *p = NULL; | |
794 | ||
795 | assert(s); | |
796 | ||
797 | /* This is called after the session scope and the user service were successfully created, and finishes where | |
798 | * bus_manager_create_session() left off. */ | |
799 | ||
800 | if (!s->create_message) | |
801 | return 0; | |
802 | ||
803 | if (!sd_bus_error_is_set(error) && !session_ready(s)) | |
804 | return 0; | |
805 | ||
806 | c = TAKE_PTR(s->create_message); | |
807 | if (error) | |
808 | return sd_bus_reply_method_error(c, error); | |
809 | ||
810 | fifo_fd = session_create_fifo(s); | |
811 | if (fifo_fd < 0) | |
812 | return fifo_fd; | |
813 | ||
814 | /* Update the session state file before we notify the client about the result. */ | |
815 | session_save(s); | |
816 | ||
817 | p = session_bus_path(s); | |
818 | if (!p) | |
819 | return -ENOMEM; | |
820 | ||
821 | log_debug("Sending reply about created session: " | |
822 | "id=%s object_path=%s uid=%u runtime_path=%s " | |
823 | "session_fd=%d seat=%s vtnr=%u", | |
824 | s->id, | |
825 | p, | |
826 | (uint32_t) s->user->user_record->uid, | |
827 | s->user->runtime_path, | |
828 | fifo_fd, | |
829 | s->seat ? s->seat->id : "", | |
830 | (uint32_t) s->vtnr); | |
831 | ||
832 | return sd_bus_reply_method_return( | |
833 | c, "soshusub", | |
834 | s->id, | |
835 | p, | |
836 | s->user->runtime_path, | |
837 | fifo_fd, | |
838 | (uint32_t) s->user->user_record->uid, | |
839 | s->seat ? s->seat->id : "", | |
840 | (uint32_t) s->vtnr, | |
841 | false); | |
842 | } |