Line data Source code
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 "strv.h"
26 : #include "bus-util.h"
27 : #include "logind.h"
28 : #include "logind-user.h"
29 : #include "formats-util.h"
30 :
31 0 : static int property_get_display(
32 : sd_bus *bus,
33 : const char *path,
34 : const char *interface,
35 : const char *property,
36 : sd_bus_message *reply,
37 : void *userdata,
38 : sd_bus_error *error) {
39 :
40 0 : _cleanup_free_ char *p = NULL;
41 0 : User *u = userdata;
42 :
43 0 : assert(bus);
44 0 : assert(reply);
45 0 : assert(u);
46 :
47 0 : p = u->display ? session_bus_path(u->display) : strdup("/");
48 0 : if (!p)
49 0 : return -ENOMEM;
50 :
51 0 : return sd_bus_message_append(reply, "(so)", u->display ? u->display->id : "", p);
52 : }
53 :
54 0 : static int property_get_state(
55 : sd_bus *bus,
56 : const char *path,
57 : const char *interface,
58 : const char *property,
59 : sd_bus_message *reply,
60 : void *userdata,
61 : sd_bus_error *error) {
62 :
63 0 : User *u = userdata;
64 :
65 0 : assert(bus);
66 0 : assert(reply);
67 0 : assert(u);
68 :
69 0 : return sd_bus_message_append(reply, "s", user_state_to_string(user_get_state(u)));
70 : }
71 :
72 0 : static int property_get_sessions(
73 : sd_bus *bus,
74 : const char *path,
75 : const char *interface,
76 : const char *property,
77 : sd_bus_message *reply,
78 : void *userdata,
79 : sd_bus_error *error) {
80 :
81 0 : User *u = userdata;
82 : Session *session;
83 : int r;
84 :
85 0 : assert(bus);
86 0 : assert(reply);
87 0 : assert(u);
88 :
89 0 : r = sd_bus_message_open_container(reply, 'a', "(so)");
90 0 : if (r < 0)
91 0 : return r;
92 :
93 0 : LIST_FOREACH(sessions_by_user, session, u->sessions) {
94 0 : _cleanup_free_ char *p = NULL;
95 :
96 0 : p = session_bus_path(session);
97 0 : if (!p)
98 0 : return -ENOMEM;
99 :
100 0 : r = sd_bus_message_append(reply, "(so)", session->id, p);
101 0 : if (r < 0)
102 0 : return r;
103 :
104 : }
105 :
106 0 : return sd_bus_message_close_container(reply);
107 : }
108 :
109 0 : static int property_get_idle_hint(
110 : sd_bus *bus,
111 : const char *path,
112 : const char *interface,
113 : const char *property,
114 : sd_bus_message *reply,
115 : void *userdata,
116 : sd_bus_error *error) {
117 :
118 0 : User *u = userdata;
119 :
120 0 : assert(bus);
121 0 : assert(reply);
122 0 : assert(u);
123 :
124 0 : return sd_bus_message_append(reply, "b", user_get_idle_hint(u, NULL) > 0);
125 : }
126 :
127 0 : static int property_get_idle_since_hint(
128 : sd_bus *bus,
129 : const char *path,
130 : const char *interface,
131 : const char *property,
132 : sd_bus_message *reply,
133 : void *userdata,
134 : sd_bus_error *error) {
135 :
136 0 : User *u = userdata;
137 0 : dual_timestamp t = DUAL_TIMESTAMP_NULL;
138 : uint64_t k;
139 :
140 0 : assert(bus);
141 0 : assert(reply);
142 0 : assert(u);
143 :
144 0 : user_get_idle_hint(u, &t);
145 0 : k = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
146 :
147 0 : return sd_bus_message_append(reply, "t", k);
148 : }
149 :
150 0 : static int property_get_linger(
151 : sd_bus *bus,
152 : const char *path,
153 : const char *interface,
154 : const char *property,
155 : sd_bus_message *reply,
156 : void *userdata,
157 : sd_bus_error *error) {
158 :
159 0 : User *u = userdata;
160 : int r;
161 :
162 0 : assert(bus);
163 0 : assert(reply);
164 0 : assert(u);
165 :
166 0 : r = user_check_linger_file(u);
167 :
168 0 : return sd_bus_message_append(reply, "b", r > 0);
169 : }
170 :
171 0 : int bus_user_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
172 0 : User *u = userdata;
173 : int r;
174 :
175 0 : assert(message);
176 0 : assert(u);
177 :
178 0 : r = bus_verify_polkit_async(
179 : message,
180 : CAP_KILL,
181 : "org.freedesktop.login1.manage",
182 : false,
183 : u->uid,
184 0 : &u->manager->polkit_registry,
185 : error);
186 0 : if (r < 0)
187 0 : return r;
188 0 : if (r == 0)
189 0 : return 1; /* Will call us back */
190 :
191 0 : r = user_stop(u, true);
192 0 : if (r < 0)
193 0 : return r;
194 :
195 0 : return sd_bus_reply_method_return(message, NULL);
196 : }
197 :
198 0 : int bus_user_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) {
199 0 : User *u = userdata;
200 : int32_t signo;
201 : int r;
202 :
203 0 : assert(message);
204 0 : assert(u);
205 :
206 0 : r = bus_verify_polkit_async(
207 : message,
208 : CAP_KILL,
209 : "org.freedesktop.login1.manage",
210 : false,
211 : u->uid,
212 0 : &u->manager->polkit_registry,
213 : error);
214 0 : if (r < 0)
215 0 : return r;
216 0 : if (r == 0)
217 0 : return 1; /* Will call us back */
218 :
219 0 : r = sd_bus_message_read(message, "i", &signo);
220 0 : if (r < 0)
221 0 : return r;
222 :
223 0 : if (signo <= 0 || signo >= _NSIG)
224 0 : return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo);
225 :
226 0 : r = user_kill(u, signo);
227 0 : if (r < 0)
228 0 : return r;
229 :
230 0 : return sd_bus_reply_method_return(message, NULL);
231 : }
232 :
233 : const sd_bus_vtable user_vtable[] = {
234 : SD_BUS_VTABLE_START(0),
235 :
236 : SD_BUS_PROPERTY("UID", "u", bus_property_get_uid, offsetof(User, uid), SD_BUS_VTABLE_PROPERTY_CONST),
237 : SD_BUS_PROPERTY("GID", "u", bus_property_get_gid, offsetof(User, gid), SD_BUS_VTABLE_PROPERTY_CONST),
238 : SD_BUS_PROPERTY("Name", "s", NULL, offsetof(User, name), SD_BUS_VTABLE_PROPERTY_CONST),
239 : BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(User, timestamp), SD_BUS_VTABLE_PROPERTY_CONST),
240 : SD_BUS_PROPERTY("RuntimePath", "s", NULL, offsetof(User, runtime_path), SD_BUS_VTABLE_PROPERTY_CONST),
241 : SD_BUS_PROPERTY("Service", "s", NULL, offsetof(User, service), SD_BUS_VTABLE_PROPERTY_CONST),
242 : SD_BUS_PROPERTY("Slice", "s", NULL, offsetof(User, slice), SD_BUS_VTABLE_PROPERTY_CONST),
243 : SD_BUS_PROPERTY("Display", "(so)", property_get_display, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
244 : SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0),
245 : SD_BUS_PROPERTY("Sessions", "a(so)", property_get_sessions, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
246 : SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
247 : SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
248 : SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
249 : SD_BUS_PROPERTY("Linger", "b", property_get_linger, 0, 0),
250 :
251 : SD_BUS_METHOD("Terminate", NULL, NULL, bus_user_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED),
252 : SD_BUS_METHOD("Kill", "i", NULL, bus_user_method_kill, SD_BUS_VTABLE_UNPRIVILEGED),
253 :
254 : SD_BUS_VTABLE_END
255 : };
256 :
257 0 : int user_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
258 0 : Manager *m = userdata;
259 : uid_t uid;
260 : User *user;
261 : int r;
262 :
263 0 : assert(bus);
264 0 : assert(path);
265 0 : assert(interface);
266 0 : assert(found);
267 0 : assert(m);
268 :
269 0 : if (streq(path, "/org/freedesktop/login1/user/self")) {
270 0 : _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
271 : sd_bus_message *message;
272 :
273 0 : message = sd_bus_get_current_message(bus);
274 0 : if (!message)
275 0 : return 0;
276 :
277 0 : r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
278 0 : if (r < 0)
279 0 : return r;
280 :
281 0 : r = sd_bus_creds_get_owner_uid(creds, &uid);
282 : } else {
283 : const char *p;
284 :
285 0 : p = startswith(path, "/org/freedesktop/login1/user/_");
286 0 : if (!p)
287 0 : return 0;
288 :
289 0 : r = parse_uid(p, &uid);
290 : }
291 0 : if (r < 0)
292 0 : return 0;
293 :
294 0 : user = hashmap_get(m->users, UID_TO_PTR(uid));
295 0 : if (!user)
296 0 : return 0;
297 :
298 0 : *found = user;
299 0 : return 1;
300 : }
301 :
302 0 : char *user_bus_path(User *u) {
303 : char *s;
304 :
305 0 : assert(u);
306 :
307 0 : if (asprintf(&s, "/org/freedesktop/login1/user/_"UID_FMT, u->uid) < 0)
308 0 : return NULL;
309 :
310 0 : return s;
311 : }
312 :
313 0 : int user_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
314 0 : _cleanup_strv_free_ char **l = NULL;
315 : sd_bus_message *message;
316 0 : Manager *m = userdata;
317 : User *user;
318 : Iterator i;
319 : int r;
320 :
321 0 : assert(bus);
322 0 : assert(path);
323 0 : assert(nodes);
324 :
325 0 : HASHMAP_FOREACH(user, m->users, i) {
326 : char *p;
327 :
328 0 : p = user_bus_path(user);
329 0 : if (!p)
330 0 : return -ENOMEM;
331 :
332 0 : r = strv_consume(&l, p);
333 0 : if (r < 0)
334 0 : return r;
335 : }
336 :
337 0 : message = sd_bus_get_current_message(bus);
338 0 : if (message) {
339 0 : _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
340 : uid_t uid;
341 :
342 0 : r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds);
343 0 : if (r >= 0) {
344 0 : r = sd_bus_creds_get_owner_uid(creds, &uid);
345 0 : if (r >= 0) {
346 0 : user = hashmap_get(m->users, UID_TO_PTR(uid));
347 0 : if (user) {
348 0 : r = strv_extend(&l, "/org/freedesktop/login1/user/self");
349 0 : if (r < 0)
350 0 : return r;
351 : }
352 : }
353 : }
354 : }
355 :
356 0 : *nodes = l;
357 0 : l = NULL;
358 :
359 0 : return 1;
360 : }
361 :
362 0 : int user_send_signal(User *u, bool new_user) {
363 0 : _cleanup_free_ char *p = NULL;
364 :
365 0 : assert(u);
366 :
367 0 : p = user_bus_path(u);
368 0 : if (!p)
369 0 : return -ENOMEM;
370 :
371 0 : return sd_bus_emit_signal(
372 0 : u->manager->bus,
373 : "/org/freedesktop/login1",
374 : "org.freedesktop.login1.Manager",
375 : new_user ? "UserNew" : "UserRemoved",
376 0 : "uo", (uint32_t) u->uid, p);
377 : }
378 :
379 0 : int user_send_changed(User *u, const char *properties, ...) {
380 0 : _cleanup_free_ char *p = NULL;
381 : char **l;
382 :
383 0 : assert(u);
384 :
385 0 : if (!u->started)
386 0 : return 0;
387 :
388 0 : p = user_bus_path(u);
389 0 : if (!p)
390 0 : return -ENOMEM;
391 :
392 0 : l = strv_from_stdarg_alloca(properties);
393 :
394 0 : return sd_bus_emit_properties_changed_strv(u->manager->bus, p, "org.freedesktop.login1.User", l);
395 : }
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