]>
Commit | Line | Data |
---|---|---|
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <string.h> | |
24 | ||
25 | #include "logind.h" | |
26 | #include "logind-session.h" | |
27 | #include "dbus-common.h" | |
28 | #include "util.h" | |
29 | ||
30 | #define BUS_SESSION_INTERFACE \ | |
31 | " <interface name=\"org.freedesktop.login1.Session\">\n" \ | |
32 | " <method name=\"Terminate\"/>\n" \ | |
33 | " <method name=\"Activate\"/>\n" \ | |
34 | " <method name=\"Lock\"/>\n" \ | |
35 | " <method name=\"Unlock\"/>\n" \ | |
36 | " <method name=\"SetIdleHint\">\n" \ | |
37 | " <arg name=\"b\" type=\"b\"/>\n" \ | |
38 | " </method>\n" \ | |
39 | " <method name=\"Kill\">\n" \ | |
40 | " <arg name=\"who\" type=\"s\"/>\n" \ | |
41 | " <arg name=\"signal\" type=\"s\"/>\n" \ | |
42 | " </method>\n" \ | |
43 | " <signal name=\"Lock\"/>\n" \ | |
44 | " <signal name=\"Unlock\"/>\n" \ | |
45 | " <property name=\"Id\" type=\"s\" access=\"read\"/>\n" \ | |
46 | " <property name=\"User\" type=\"(uo)\" access=\"read\"/>\n" \ | |
47 | " <property name=\"Name\" type=\"s\" access=\"read\"/>\n" \ | |
48 | " <property name=\"Timestamp\" type=\"t\" access=\"read\"/>\n" \ | |
49 | " <property name=\"TimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \ | |
50 | " <property name=\"DefaultControlGroup\" type=\"s\" access=\"read\"/>\n" \ | |
51 | " <property name=\"VTNr\" type=\"u\" access=\"read\"/>\n" \ | |
52 | " <property name=\"Seat\" type=\"(so)\" access=\"read\"/>\n" \ | |
53 | " <property name=\"TTY\" type=\"s\" access=\"read\"/>\n" \ | |
54 | " <property name=\"Display\" type=\"s\" access=\"read\"/>\n" \ | |
55 | " <property name=\"Remote\" type=\"b\" access=\"read\"/>\n" \ | |
56 | " <property name=\"RemoteHost\" type=\"s\" access=\"read\"/>\n" \ | |
57 | " <property name=\"RemoteUser\" type=\"s\" access=\"read\"/>\n" \ | |
58 | " <property name=\"Service\" type=\"s\" access=\"read\"/>\n" \ | |
59 | " <property name=\"Leader\" type=\"u\" access=\"read\"/>\n" \ | |
60 | " <property name=\"Audit\" type=\"u\" access=\"read\"/>\n" \ | |
61 | " <property name=\"Type\" type=\"s\" access=\"read\"/>\n" \ | |
62 | " <property name=\"Class\" type=\"s\" access=\"read\"/>\n" \ | |
63 | " <property name=\"Active\" type=\"b\" access=\"read\"/>\n" \ | |
64 | " <property name=\"State\" type=\"s\" access=\"read\"/>\n" \ | |
65 | " <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \ | |
66 | " <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \ | |
67 | " <property name=\"KillProcesses\" type=\"b\" access=\"read\"/>\n" \ | |
68 | " <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n" \ | |
69 | " <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \ | |
70 | " <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \ | |
71 | " </interface>\n" | |
72 | ||
73 | #define INTROSPECTION \ | |
74 | DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ | |
75 | "<node>\n" \ | |
76 | BUS_SESSION_INTERFACE \ | |
77 | BUS_PROPERTIES_INTERFACE \ | |
78 | BUS_PEER_INTERFACE \ | |
79 | BUS_INTROSPECTABLE_INTERFACE \ | |
80 | "</node>\n" | |
81 | ||
82 | #define INTERFACES_LIST \ | |
83 | BUS_GENERIC_INTERFACES_LIST \ | |
84 | "org.freedesktop.login1.Session\0" | |
85 | ||
86 | static int bus_session_append_seat(DBusMessageIter *i, const char *property, void *data) { | |
87 | DBusMessageIter sub; | |
88 | Session *s = data; | |
89 | const char *id, *path; | |
90 | char *p = NULL; | |
91 | ||
92 | assert(i); | |
93 | assert(property); | |
94 | assert(s); | |
95 | ||
96 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) | |
97 | return -ENOMEM; | |
98 | ||
99 | if (s->seat) { | |
100 | id = s->seat->id; | |
101 | path = p = seat_bus_path(s->seat); | |
102 | ||
103 | if (!p) | |
104 | return -ENOMEM; | |
105 | } else { | |
106 | id = ""; | |
107 | path = "/"; | |
108 | } | |
109 | ||
110 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &id) || | |
111 | !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &path)) | |
112 | return -ENOMEM; | |
113 | ||
114 | if (!dbus_message_iter_close_container(i, &sub)) | |
115 | return -ENOMEM; | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | static int bus_session_append_user(DBusMessageIter *i, const char *property, void *data) { | |
121 | DBusMessageIter sub; | |
122 | User *u = data; | |
123 | _cleanup_free_ char *p = NULL; | |
124 | ||
125 | assert(i); | |
126 | assert(property); | |
127 | assert(u); | |
128 | ||
129 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) | |
130 | return -ENOMEM; | |
131 | ||
132 | p = user_bus_path(u); | |
133 | if (!p) | |
134 | return -ENOMEM; | |
135 | ||
136 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->uid) || | |
137 | !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) | |
138 | return -ENOMEM; | |
139 | ||
140 | if (!dbus_message_iter_close_container(i, &sub)) | |
141 | return -ENOMEM; | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | static int bus_session_append_active(DBusMessageIter *i, const char *property, void *data) { | |
147 | Session *s = data; | |
148 | dbus_bool_t b; | |
149 | ||
150 | assert(i); | |
151 | assert(property); | |
152 | assert(s); | |
153 | ||
154 | b = session_is_active(s); | |
155 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) | |
156 | return -ENOMEM; | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static int bus_session_append_idle_hint(DBusMessageIter *i, const char *property, void *data) { | |
162 | Session *s = data; | |
163 | int b; | |
164 | ||
165 | assert(i); | |
166 | assert(property); | |
167 | assert(s); | |
168 | ||
169 | b = session_get_idle_hint(s, NULL) > 0; | |
170 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) | |
171 | return -ENOMEM; | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | static int bus_session_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) { | |
177 | Session *s = data; | |
178 | dual_timestamp t; | |
179 | uint64_t u; | |
180 | int r; | |
181 | ||
182 | assert(i); | |
183 | assert(property); | |
184 | assert(s); | |
185 | ||
186 | r = session_get_idle_hint(s, &t); | |
187 | if (r < 0) | |
188 | return r; | |
189 | ||
190 | u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; | |
191 | ||
192 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) | |
193 | return -ENOMEM; | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | static int bus_session_append_default_cgroup(DBusMessageIter *i, const char *property, void *data) { | |
199 | Session *s = data; | |
200 | _cleanup_free_ char *t = NULL; | |
201 | int r; | |
202 | bool success; | |
203 | ||
204 | assert(i); | |
205 | assert(property); | |
206 | assert(s); | |
207 | ||
208 | r = cg_join_spec(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, &t); | |
209 | if (r < 0) | |
210 | return r; | |
211 | ||
212 | success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t); | |
213 | return success ? 0 : -ENOMEM; | |
214 | } | |
215 | ||
216 | static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_type, session_type, SessionType); | |
217 | static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_class, session_class, SessionClass); | |
218 | ||
219 | static int bus_session_append_state(DBusMessageIter *i, const char *property, void *data) { | |
220 | Session *s = data; | |
221 | const char *state; | |
222 | ||
223 | assert(i); | |
224 | assert(property); | |
225 | assert(s); | |
226 | ||
227 | state = session_state_to_string(session_get_state(s)); | |
228 | ||
229 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) | |
230 | return -ENOMEM; | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | static int get_session_for_path(Manager *m, const char *path, Session **_s) { | |
236 | Session *s; | |
237 | char *id; | |
238 | ||
239 | assert(m); | |
240 | assert(path); | |
241 | assert(_s); | |
242 | ||
243 | if (!startswith(path, "/org/freedesktop/login1/session/")) | |
244 | return -EINVAL; | |
245 | ||
246 | id = bus_path_unescape(path + 32); | |
247 | if (!id) | |
248 | return -ENOMEM; | |
249 | ||
250 | s = hashmap_get(m->sessions, id); | |
251 | free(id); | |
252 | ||
253 | if (!s) | |
254 | return -ENOENT; | |
255 | ||
256 | *_s = s; | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static const BusProperty bus_login_session_properties[] = { | |
261 | { "Id", bus_property_append_string, "s", offsetof(Session, id), true }, | |
262 | { "Timestamp", bus_property_append_usec, "t", offsetof(Session, timestamp.realtime) }, | |
263 | { "TimestampMonotonic", bus_property_append_usec, "t", offsetof(Session, timestamp.monotonic) }, | |
264 | { "DefaultControlGroup", bus_session_append_default_cgroup, "s", 0, }, | |
265 | { "VTNr", bus_property_append_uint32, "u", offsetof(Session, vtnr) }, | |
266 | { "Seat", bus_session_append_seat, "(so)", 0 }, | |
267 | { "TTY", bus_property_append_string, "s", offsetof(Session, tty), true }, | |
268 | { "Display", bus_property_append_string, "s", offsetof(Session, display), true }, | |
269 | { "Remote", bus_property_append_bool, "b", offsetof(Session, remote) }, | |
270 | { "RemoteUser", bus_property_append_string, "s", offsetof(Session, remote_user), true }, | |
271 | { "RemoteHost", bus_property_append_string, "s", offsetof(Session, remote_host), true }, | |
272 | { "Service", bus_property_append_string, "s", offsetof(Session, service), true }, | |
273 | { "Leader", bus_property_append_pid, "u", offsetof(Session, leader) }, | |
274 | { "Audit", bus_property_append_uint32, "u", offsetof(Session, audit_id) }, | |
275 | { "Type", bus_session_append_type, "s", offsetof(Session, type) }, | |
276 | { "Class", bus_session_append_class, "s", offsetof(Session, class) }, | |
277 | { "Active", bus_session_append_active, "b", 0 }, | |
278 | { "State", bus_session_append_state, "s", 0 }, | |
279 | { "Controllers", bus_property_append_strv, "as", offsetof(Session, controllers), true }, | |
280 | { "ResetControllers", bus_property_append_strv, "as", offsetof(Session, reset_controllers), true }, | |
281 | { "KillProcesses", bus_property_append_bool, "b", offsetof(Session, kill_processes) }, | |
282 | { "IdleHint", bus_session_append_idle_hint, "b", 0 }, | |
283 | { "IdleSinceHint", bus_session_append_idle_hint_since, "t", 0 }, | |
284 | { "IdleSinceHintMonotonic", bus_session_append_idle_hint_since, "t", 0 }, | |
285 | { NULL, } | |
286 | }; | |
287 | ||
288 | static const BusProperty bus_login_session_user_properties[] = { | |
289 | { "User", bus_session_append_user, "(uo)", 0 }, | |
290 | { "Name", bus_property_append_string, "s", offsetof(User, name), true }, | |
291 | { NULL, } | |
292 | }; | |
293 | ||
294 | static DBusHandlerResult session_message_dispatch( | |
295 | Session *s, | |
296 | DBusConnection *connection, | |
297 | DBusMessage *message) { | |
298 | ||
299 | DBusError error; | |
300 | _cleanup_dbus_message_unref_ DBusMessage *reply = NULL; | |
301 | int r; | |
302 | ||
303 | assert(s); | |
304 | assert(connection); | |
305 | assert(message); | |
306 | ||
307 | dbus_error_init(&error); | |
308 | ||
309 | if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Terminate")) { | |
310 | ||
311 | r = session_stop(s); | |
312 | if (r < 0) | |
313 | return bus_send_error_reply(connection, message, NULL, r); | |
314 | ||
315 | reply = dbus_message_new_method_return(message); | |
316 | if (!reply) | |
317 | goto oom; | |
318 | ||
319 | } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Activate")) { | |
320 | ||
321 | r = session_activate(s); | |
322 | if (r < 0) | |
323 | return bus_send_error_reply(connection, message, NULL, r); | |
324 | ||
325 | reply = dbus_message_new_method_return(message); | |
326 | if (!reply) | |
327 | goto oom; | |
328 | ||
329 | } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Lock") || | |
330 | dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Unlock")) { | |
331 | ||
332 | if (session_send_lock(s, streq(dbus_message_get_member(message), "Lock")) < 0) | |
333 | goto oom; | |
334 | ||
335 | reply = dbus_message_new_method_return(message); | |
336 | if (!reply) | |
337 | goto oom; | |
338 | ||
339 | } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "SetIdleHint")) { | |
340 | dbus_bool_t b; | |
341 | unsigned long ul; | |
342 | ||
343 | if (!dbus_message_get_args( | |
344 | message, | |
345 | &error, | |
346 | DBUS_TYPE_BOOLEAN, &b, | |
347 | DBUS_TYPE_INVALID)) | |
348 | return bus_send_error_reply(connection, message, &error, -EINVAL); | |
349 | ||
350 | ul = dbus_bus_get_unix_user(connection, dbus_message_get_sender(message), &error); | |
351 | if (ul == (unsigned long) -1) | |
352 | return bus_send_error_reply(connection, message, &error, -EIO); | |
353 | ||
354 | if (ul != 0 && ul != s->user->uid) | |
355 | return bus_send_error_reply(connection, message, NULL, -EPERM); | |
356 | ||
357 | session_set_idle_hint(s, b); | |
358 | ||
359 | reply = dbus_message_new_method_return(message); | |
360 | if (!reply) | |
361 | goto oom; | |
362 | ||
363 | } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Kill")) { | |
364 | const char *swho; | |
365 | int32_t signo; | |
366 | KillWho who; | |
367 | ||
368 | if (!dbus_message_get_args( | |
369 | message, | |
370 | &error, | |
371 | DBUS_TYPE_STRING, &swho, | |
372 | DBUS_TYPE_INT32, &signo, | |
373 | DBUS_TYPE_INVALID)) | |
374 | return bus_send_error_reply(connection, message, &error, -EINVAL); | |
375 | ||
376 | if (isempty(swho)) | |
377 | who = KILL_ALL; | |
378 | else { | |
379 | who = kill_who_from_string(swho); | |
380 | if (who < 0) | |
381 | return bus_send_error_reply(connection, message, &error, -EINVAL); | |
382 | } | |
383 | ||
384 | if (signo <= 0 || signo >= _NSIG) | |
385 | return bus_send_error_reply(connection, message, &error, -EINVAL); | |
386 | ||
387 | r = session_kill(s, who, signo); | |
388 | if (r < 0) | |
389 | return bus_send_error_reply(connection, message, NULL, r); | |
390 | ||
391 | reply = dbus_message_new_method_return(message); | |
392 | if (!reply) | |
393 | goto oom; | |
394 | ||
395 | } else { | |
396 | const BusBoundProperties bps[] = { | |
397 | { "org.freedesktop.login1.Session", bus_login_session_properties, s }, | |
398 | { "org.freedesktop.login1.Session", bus_login_session_user_properties, s->user }, | |
399 | { NULL, } | |
400 | }; | |
401 | return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps); | |
402 | } | |
403 | ||
404 | if (reply) { | |
405 | if (!bus_maybe_send_reply(connection, message, reply)) | |
406 | goto oom; | |
407 | } | |
408 | ||
409 | return DBUS_HANDLER_RESULT_HANDLED; | |
410 | ||
411 | oom: | |
412 | dbus_error_free(&error); | |
413 | ||
414 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
415 | } | |
416 | ||
417 | static DBusHandlerResult session_message_handler( | |
418 | DBusConnection *connection, | |
419 | DBusMessage *message, | |
420 | void *userdata) { | |
421 | ||
422 | Manager *m = userdata; | |
423 | Session *s; | |
424 | int r; | |
425 | ||
426 | r = get_session_for_path(m, dbus_message_get_path(message), &s); | |
427 | if (r < 0) { | |
428 | ||
429 | if (r == -ENOMEM) | |
430 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
431 | ||
432 | if (r == -ENOENT) { | |
433 | DBusError e; | |
434 | ||
435 | dbus_error_init(&e); | |
436 | dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown session"); | |
437 | return bus_send_error_reply(connection, message, &e, r); | |
438 | } | |
439 | ||
440 | return bus_send_error_reply(connection, message, NULL, r); | |
441 | } | |
442 | ||
443 | return session_message_dispatch(s, connection, message); | |
444 | } | |
445 | ||
446 | const DBusObjectPathVTable bus_session_vtable = { | |
447 | .message_function = session_message_handler | |
448 | }; | |
449 | ||
450 | char *session_bus_path(Session *s) { | |
451 | _cleanup_free_ char *t; | |
452 | ||
453 | assert(s); | |
454 | ||
455 | t = bus_path_escape(s->id); | |
456 | if (!t) | |
457 | return NULL; | |
458 | ||
459 | return strappend("/org/freedesktop/login1/session/", t); | |
460 | } | |
461 | ||
462 | int session_send_signal(Session *s, bool new_session) { | |
463 | _cleanup_dbus_message_unref_ DBusMessage *m = NULL; | |
464 | _cleanup_free_ char *p = NULL; | |
465 | ||
466 | assert(s); | |
467 | ||
468 | m = dbus_message_new_signal("/org/freedesktop/login1", | |
469 | "org.freedesktop.login1.Manager", | |
470 | new_session ? "SessionNew" : "SessionRemoved"); | |
471 | ||
472 | if (!m) | |
473 | return -ENOMEM; | |
474 | ||
475 | p = session_bus_path(s); | |
476 | if (!p) | |
477 | return -ENOMEM; | |
478 | ||
479 | if (!dbus_message_append_args( | |
480 | m, | |
481 | DBUS_TYPE_STRING, &s->id, | |
482 | DBUS_TYPE_OBJECT_PATH, &p, | |
483 | DBUS_TYPE_INVALID)) | |
484 | return -ENOMEM; | |
485 | ||
486 | if (!dbus_connection_send(s->manager->bus, m, NULL)) | |
487 | return -ENOMEM; | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | int session_send_changed(Session *s, const char *properties) { | |
493 | _cleanup_dbus_message_unref_ DBusMessage *m = NULL; | |
494 | _cleanup_free_ char *p = NULL; | |
495 | ||
496 | assert(s); | |
497 | ||
498 | if (!s->started) | |
499 | return 0; | |
500 | ||
501 | p = session_bus_path(s); | |
502 | if (!p) | |
503 | return -ENOMEM; | |
504 | ||
505 | m = bus_properties_changed_new(p, "org.freedesktop.login1.Session", properties); | |
506 | if (!m) | |
507 | return -ENOMEM; | |
508 | ||
509 | if (!dbus_connection_send(s->manager->bus, m, NULL)) | |
510 | return -ENOMEM; | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | int session_send_lock(Session *s, bool lock) { | |
516 | _cleanup_dbus_message_unref_ DBusMessage *m = NULL; | |
517 | bool b; | |
518 | _cleanup_free_ char *p = NULL; | |
519 | ||
520 | assert(s); | |
521 | ||
522 | p = session_bus_path(s); | |
523 | if (!p) | |
524 | return -ENOMEM; | |
525 | ||
526 | m = dbus_message_new_signal(p, "org.freedesktop.login1.Session", lock ? "Lock" : "Unlock"); | |
527 | ||
528 | if (!m) | |
529 | return -ENOMEM; | |
530 | ||
531 | b = dbus_connection_send(s->manager->bus, m, NULL); | |
532 | if (!b) | |
533 | return -ENOMEM; | |
534 | ||
535 | return 0; | |
536 | } | |
537 | ||
538 | int session_send_lock_all(Manager *m, bool lock) { | |
539 | Session *session; | |
540 | Iterator i; | |
541 | int r = 0; | |
542 | ||
543 | assert(m); | |
544 | ||
545 | HASHMAP_FOREACH(session, m->sessions, i) { | |
546 | int k; | |
547 | ||
548 | k = session_send_lock(session, lock); | |
549 | if (k < 0) | |
550 | r = k; | |
551 | } | |
552 | ||
553 | return r; | |
554 | } |