]>
Commit | Line | Data |
---|---|---|
3f49d45a LP |
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 | |
5430f7f2 LP |
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 | |
3f49d45a LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
3f49d45a | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
3f49d45a LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
a185c5aa | 23 | #include <string.h> |
3f49d45a LP |
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" \ | |
f401e48c LP |
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" \ | |
de07ab16 LP |
39 | " <method name=\"Kill\">\n" \ |
40 | " <arg name=\"who\" type=\"s\"/>\n" \ | |
41 | " <arg name=\"signal\" type=\"s\"/>\n" \ | |
42 | " </method>\n" \ | |
e3e9cc80 | 43 | " <property name=\"Id\" type=\"s\" access=\"read\"/>\n" \ |
3f49d45a LP |
44 | " <property name=\"User\" type=\"(uo)\" access=\"read\"/>\n" \ |
45 | " <property name=\"Name\" type=\"s\" access=\"read\"/>\n" \ | |
f401e48c LP |
46 | " <property name=\"Timestamp\" type=\"t\" access=\"read\"/>\n" \ |
47 | " <property name=\"TimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \ | |
b69d29ce | 48 | " <property name=\"DefaultControlGroup\" type=\"s\" access=\"read\"/>\n" \ |
3f49d45a LP |
49 | " <property name=\"VTNr\" type=\"u\" access=\"read\"/>\n" \ |
50 | " <property name=\"Seat\" type=\"(so)\" access=\"read\"/>\n" \ | |
51 | " <property name=\"TTY\" type=\"s\" access=\"read\"/>\n" \ | |
52 | " <property name=\"Display\" type=\"s\" access=\"read\"/>\n" \ | |
53 | " <property name=\"Remote\" type=\"b\" access=\"read\"/>\n" \ | |
54 | " <property name=\"RemoteHost\" type=\"s\" access=\"read\"/>\n" \ | |
55 | " <property name=\"RemoteUser\" type=\"s\" access=\"read\"/>\n" \ | |
98a28fef | 56 | " <property name=\"Service\" type=\"s\" access=\"read\"/>\n" \ |
3f49d45a LP |
57 | " <property name=\"Leader\" type=\"u\" access=\"read\"/>\n" \ |
58 | " <property name=\"Audit\" type=\"u\" access=\"read\"/>\n" \ | |
59 | " <property name=\"Type\" type=\"s\" access=\"read\"/>\n" \ | |
55efac6c | 60 | " <property name=\"Class\" type=\"s\" access=\"read\"/>\n" \ |
3f49d45a LP |
61 | " <property name=\"Active\" type=\"b\" access=\"read\"/>\n" \ |
62 | " <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \ | |
63 | " <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \ | |
64 | " <property name=\"KillProcesses\" type=\"b\" access=\"read\"/>\n" \ | |
f401e48c LP |
65 | " <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n" \ |
66 | " <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \ | |
67 | " <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \ | |
3f49d45a LP |
68 | " </interface>\n" |
69 | ||
70 | #define INTROSPECTION \ | |
71 | DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ | |
72 | "<node>\n" \ | |
73 | BUS_SESSION_INTERFACE \ | |
74 | BUS_PROPERTIES_INTERFACE \ | |
75 | BUS_PEER_INTERFACE \ | |
76 | BUS_INTROSPECTABLE_INTERFACE \ | |
77 | "</node>\n" | |
78 | ||
79 | #define INTERFACES_LIST \ | |
80 | BUS_GENERIC_INTERFACES_LIST \ | |
81 | "org.freedesktop.login1.Session\0" | |
82 | ||
83 | static int bus_session_append_seat(DBusMessageIter *i, const char *property, void *data) { | |
84 | DBusMessageIter sub; | |
85 | Session *s = data; | |
86 | const char *id, *path; | |
87 | char *p = NULL; | |
88 | ||
89 | assert(i); | |
90 | assert(property); | |
91 | assert(s); | |
92 | ||
93 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) | |
94 | return -ENOMEM; | |
95 | ||
96 | if (s->seat) { | |
97 | id = s->seat->id; | |
98 | path = p = seat_bus_path(s->seat); | |
99 | ||
100 | if (!p) | |
101 | return -ENOMEM; | |
102 | } else { | |
103 | id = ""; | |
104 | path = "/"; | |
105 | } | |
106 | ||
107 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &id) || | |
108 | !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &path)) { | |
109 | free(p); | |
110 | return -ENOMEM; | |
111 | } | |
112 | ||
113 | free(p); | |
114 | ||
115 | if (!dbus_message_iter_close_container(i, &sub)) | |
116 | return -ENOMEM; | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static int bus_session_append_user(DBusMessageIter *i, const char *property, void *data) { | |
122 | DBusMessageIter sub; | |
d200735e | 123 | User *u = data; |
3f49d45a LP |
124 | char *p = NULL; |
125 | ||
126 | assert(i); | |
127 | assert(property); | |
d200735e | 128 | assert(u); |
3f49d45a LP |
129 | |
130 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) | |
131 | return -ENOMEM; | |
132 | ||
d200735e | 133 | p = user_bus_path(u); |
3f49d45a LP |
134 | if (!p) |
135 | return -ENOMEM; | |
136 | ||
d200735e | 137 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->uid) || |
3f49d45a LP |
138 | !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) { |
139 | free(p); | |
140 | return -ENOMEM; | |
141 | } | |
142 | ||
143 | free(p); | |
144 | ||
145 | if (!dbus_message_iter_close_container(i, &sub)) | |
146 | return -ENOMEM; | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int bus_session_append_active(DBusMessageIter *i, const char *property, void *data) { | |
152 | Session *s = data; | |
77527da0 | 153 | dbus_bool_t b; |
3f49d45a LP |
154 | |
155 | assert(i); | |
156 | assert(property); | |
157 | assert(s); | |
158 | ||
159 | b = session_is_active(s); | |
160 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) | |
161 | return -ENOMEM; | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
a185c5aa LP |
166 | static int bus_session_append_idle_hint(DBusMessageIter *i, const char *property, void *data) { |
167 | Session *s = data; | |
77527da0 | 168 | int b; |
a185c5aa LP |
169 | |
170 | assert(i); | |
171 | assert(property); | |
172 | assert(s); | |
173 | ||
77527da0 | 174 | b = session_get_idle_hint(s, NULL) > 0; |
a185c5aa LP |
175 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
176 | return -ENOMEM; | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | static int bus_session_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) { | |
182 | Session *s = data; | |
183 | dual_timestamp t; | |
184 | uint64_t u; | |
185 | ||
186 | assert(i); | |
187 | assert(property); | |
188 | assert(s); | |
189 | ||
190 | session_get_idle_hint(s, &t); | |
191 | u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; | |
192 | ||
193 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) | |
194 | return -ENOMEM; | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
b69d29ce LP |
199 | static int bus_session_append_default_cgroup(DBusMessageIter *i, const char *property, void *data) { |
200 | Session *s = data; | |
201 | char *t; | |
202 | int r; | |
203 | bool success; | |
204 | ||
205 | assert(i); | |
206 | assert(property); | |
207 | assert(s); | |
208 | ||
209 | r = cg_join_spec(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, &t); | |
210 | if (r < 0) | |
211 | return r; | |
212 | ||
213 | success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t); | |
214 | free(t); | |
215 | ||
216 | return success ? 0 : -ENOMEM; | |
217 | } | |
218 | ||
3f49d45a | 219 | static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_type, session_type, SessionType); |
55efac6c | 220 | static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_class, session_class, SessionClass); |
3f49d45a LP |
221 | |
222 | static int get_session_for_path(Manager *m, const char *path, Session **_s) { | |
223 | Session *s; | |
224 | char *id; | |
225 | ||
226 | assert(m); | |
227 | assert(path); | |
228 | assert(_s); | |
229 | ||
230 | if (!startswith(path, "/org/freedesktop/login1/session/")) | |
231 | return -EINVAL; | |
232 | ||
233 | id = bus_path_unescape(path + 32); | |
234 | if (!id) | |
235 | return -ENOMEM; | |
236 | ||
237 | s = hashmap_get(m->sessions, id); | |
238 | free(id); | |
239 | ||
240 | if (!s) | |
241 | return -ENOENT; | |
242 | ||
243 | *_s = s; | |
244 | return 0; | |
245 | } | |
246 | ||
d200735e MS |
247 | static const BusProperty bus_login_session_properties[] = { |
248 | { "Id", bus_property_append_string, "s", offsetof(Session, id), true }, | |
249 | { "Timestamp", bus_property_append_usec, "t", offsetof(Session, timestamp.realtime) }, | |
250 | { "TimestampMonotonic", bus_property_append_usec, "t", offsetof(Session, timestamp.monotonic) }, | |
b69d29ce | 251 | { "DefaultControlGroup", bus_session_append_default_cgroup, "s", 0, }, |
d200735e MS |
252 | { "VTNr", bus_property_append_uint32, "u", offsetof(Session, vtnr) }, |
253 | { "Seat", bus_session_append_seat, "(so)", 0 }, | |
254 | { "TTY", bus_property_append_string, "s", offsetof(Session, tty), true }, | |
255 | { "Display", bus_property_append_string, "s", offsetof(Session, display), true }, | |
256 | { "Remote", bus_property_append_bool, "b", offsetof(Session, remote) }, | |
257 | { "RemoteUser", bus_property_append_string, "s", offsetof(Session, remote_user), true }, | |
258 | { "RemoteHost", bus_property_append_string, "s", offsetof(Session, remote_host), true }, | |
259 | { "Service", bus_property_append_string, "s", offsetof(Session, service), true }, | |
260 | { "Leader", bus_property_append_pid, "u", offsetof(Session, leader) }, | |
261 | { "Audit", bus_property_append_uint32, "u", offsetof(Session, audit_id) }, | |
262 | { "Type", bus_session_append_type, "s", offsetof(Session, type) }, | |
55efac6c | 263 | { "Class", bus_session_append_class, "s", offsetof(Session, class) }, |
d200735e MS |
264 | { "Active", bus_session_append_active, "b", 0 }, |
265 | { "Controllers", bus_property_append_strv, "as", offsetof(Session, controllers), true }, | |
266 | { "ResetControllers", bus_property_append_strv, "as", offsetof(Session, reset_controllers), true }, | |
267 | { "KillProcesses", bus_property_append_bool, "b", offsetof(Session, kill_processes) }, | |
268 | { "IdleHint", bus_session_append_idle_hint, "b", 0 }, | |
269 | { "IdleSinceHint", bus_session_append_idle_hint_since, "t", 0 }, | |
270 | { "IdleSinceHintMonotonic", bus_session_append_idle_hint_since, "t", 0 }, | |
271 | { NULL, } | |
272 | }; | |
273 | ||
274 | static const BusProperty bus_login_session_user_properties[] = { | |
275 | { "User", bus_session_append_user, "(uo)", 0 }, | |
276 | { "Name", bus_property_append_string, "s", offsetof(User, name), true }, | |
1d4ec315 | 277 | { NULL, } |
d200735e MS |
278 | }; |
279 | ||
3f49d45a LP |
280 | static DBusHandlerResult session_message_dispatch( |
281 | Session *s, | |
282 | DBusConnection *connection, | |
283 | DBusMessage *message) { | |
284 | ||
bef422ae LP |
285 | DBusError error; |
286 | DBusMessage *reply = NULL; | |
287 | int r; | |
288 | ||
3f49d45a LP |
289 | assert(s); |
290 | assert(connection); | |
291 | assert(message); | |
292 | ||
bef422ae LP |
293 | dbus_error_init(&error); |
294 | ||
295 | if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Terminate")) { | |
296 | ||
297 | r = session_stop(s); | |
298 | if (r < 0) | |
299 | return bus_send_error_reply(connection, message, NULL, r); | |
300 | ||
301 | reply = dbus_message_new_method_return(message); | |
302 | if (!reply) | |
303 | goto oom; | |
304 | ||
305 | } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Activate")) { | |
306 | ||
307 | r = session_activate(s); | |
308 | if (r < 0) | |
309 | return bus_send_error_reply(connection, message, NULL, r); | |
310 | ||
311 | reply = dbus_message_new_method_return(message); | |
312 | if (!reply) | |
313 | goto oom; | |
314 | ||
315 | } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Lock") || | |
316 | dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Unlock")) { | |
bef422ae | 317 | |
bda06175 | 318 | if (session_send_lock(s, streq(dbus_message_get_member(message), "Lock")) < 0) |
bef422ae LP |
319 | goto oom; |
320 | ||
321 | reply = dbus_message_new_method_return(message); | |
322 | if (!reply) | |
323 | goto oom; | |
324 | ||
325 | } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "SetIdleHint")) { | |
326 | dbus_bool_t b; | |
5bc849fd | 327 | unsigned long ul; |
bef422ae LP |
328 | |
329 | if (!dbus_message_get_args( | |
330 | message, | |
331 | &error, | |
332 | DBUS_TYPE_BOOLEAN, &b, | |
333 | DBUS_TYPE_INVALID)) | |
334 | return bus_send_error_reply(connection, message, &error, -EINVAL); | |
335 | ||
5bc849fd LP |
336 | ul = dbus_bus_get_unix_user(connection, dbus_message_get_sender(message), &error); |
337 | if (ul == (unsigned long) -1) | |
338 | return bus_send_error_reply(connection, message, &error, -EIO); | |
339 | ||
340 | if (ul != 0 && ul != s->user->uid) | |
341 | return bus_send_error_reply(connection, message, NULL, -EPERM); | |
342 | ||
bef422ae LP |
343 | session_set_idle_hint(s, b); |
344 | ||
345 | reply = dbus_message_new_method_return(message); | |
346 | if (!reply) | |
347 | goto oom; | |
348 | ||
de07ab16 LP |
349 | } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Kill")) { |
350 | const char *swho; | |
351 | int32_t signo; | |
352 | KillWho who; | |
353 | ||
354 | if (!dbus_message_get_args( | |
355 | message, | |
356 | &error, | |
357 | DBUS_TYPE_STRING, &swho, | |
358 | DBUS_TYPE_INT32, &signo, | |
359 | DBUS_TYPE_INVALID)) | |
360 | return bus_send_error_reply(connection, message, &error, -EINVAL); | |
361 | ||
362 | if (isempty(swho)) | |
363 | who = KILL_ALL; | |
364 | else { | |
365 | who = kill_who_from_string(swho); | |
366 | if (who < 0) | |
367 | return bus_send_error_reply(connection, message, &error, -EINVAL); | |
368 | } | |
369 | ||
370 | if (signo <= 0 || signo >= _NSIG) | |
371 | return bus_send_error_reply(connection, message, &error, -EINVAL); | |
372 | ||
373 | r = session_kill(s, who, signo); | |
374 | if (r < 0) | |
375 | return bus_send_error_reply(connection, message, NULL, r); | |
376 | ||
377 | reply = dbus_message_new_method_return(message); | |
378 | if (!reply) | |
379 | goto oom; | |
380 | ||
d200735e MS |
381 | } else { |
382 | const BusBoundProperties bps[] = { | |
383 | { "org.freedesktop.login1.Session", bus_login_session_properties, s }, | |
384 | { "org.freedesktop.login1.Session", bus_login_session_user_properties, s->user }, | |
385 | { NULL, } | |
386 | }; | |
387 | return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps); | |
388 | } | |
bef422ae LP |
389 | |
390 | if (reply) { | |
391 | if (!dbus_connection_send(connection, reply, NULL)) | |
392 | goto oom; | |
393 | ||
394 | dbus_message_unref(reply); | |
395 | } | |
396 | ||
397 | return DBUS_HANDLER_RESULT_HANDLED; | |
398 | ||
399 | oom: | |
400 | if (reply) | |
401 | dbus_message_unref(reply); | |
402 | ||
403 | dbus_error_free(&error); | |
404 | ||
405 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
3f49d45a LP |
406 | } |
407 | ||
408 | static DBusHandlerResult session_message_handler( | |
409 | DBusConnection *connection, | |
410 | DBusMessage *message, | |
411 | void *userdata) { | |
412 | ||
413 | Manager *m = userdata; | |
414 | Session *s; | |
415 | int r; | |
416 | ||
417 | r = get_session_for_path(m, dbus_message_get_path(message), &s); | |
418 | if (r < 0) { | |
419 | ||
420 | if (r == -ENOMEM) | |
421 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
422 | ||
423 | if (r == -ENOENT) { | |
424 | DBusError e; | |
425 | ||
426 | dbus_error_init(&e); | |
427 | dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown session"); | |
428 | return bus_send_error_reply(connection, message, &e, r); | |
429 | } | |
430 | ||
431 | return bus_send_error_reply(connection, message, NULL, r); | |
432 | } | |
433 | ||
434 | return session_message_dispatch(s, connection, message); | |
435 | } | |
436 | ||
437 | const DBusObjectPathVTable bus_session_vtable = { | |
438 | .message_function = session_message_handler | |
439 | }; | |
440 | ||
441 | char *session_bus_path(Session *s) { | |
442 | char *t, *r; | |
443 | ||
444 | assert(s); | |
445 | ||
446 | t = bus_path_escape(s->id); | |
447 | if (!t) | |
448 | return NULL; | |
449 | ||
450 | r = strappend("/org/freedesktop/login1/session/", t); | |
451 | free(t); | |
452 | ||
453 | return r; | |
454 | } | |
da119395 LP |
455 | |
456 | int session_send_signal(Session *s, bool new_session) { | |
457 | DBusMessage *m; | |
458 | int r = -ENOMEM; | |
459 | char *p = NULL; | |
460 | ||
461 | assert(s); | |
462 | ||
463 | m = dbus_message_new_signal("/org/freedesktop/login1", | |
464 | "org.freedesktop.login1.Manager", | |
465 | new_session ? "SessionNew" : "SessionRemoved"); | |
466 | ||
467 | if (!m) | |
468 | return -ENOMEM; | |
469 | ||
470 | p = session_bus_path(s); | |
471 | if (!p) | |
472 | goto finish; | |
473 | ||
474 | if (!dbus_message_append_args( | |
475 | m, | |
476 | DBUS_TYPE_STRING, &s->id, | |
477 | DBUS_TYPE_OBJECT_PATH, &p, | |
478 | DBUS_TYPE_INVALID)) | |
479 | goto finish; | |
480 | ||
481 | if (!dbus_connection_send(s->manager->bus, m, NULL)) | |
482 | goto finish; | |
483 | ||
484 | r = 0; | |
485 | ||
486 | finish: | |
487 | dbus_message_unref(m); | |
488 | free(p); | |
489 | ||
490 | return r; | |
491 | } | |
9418f147 LP |
492 | |
493 | int session_send_changed(Session *s, const char *properties) { | |
494 | DBusMessage *m; | |
495 | int r = -ENOMEM; | |
496 | char *p = NULL; | |
497 | ||
498 | assert(s); | |
499 | ||
ed18b08b LP |
500 | if (!s->started) |
501 | return 0; | |
502 | ||
9418f147 LP |
503 | p = session_bus_path(s); |
504 | if (!p) | |
505 | return -ENOMEM; | |
506 | ||
507 | m = bus_properties_changed_new(p, "org.freedesktop.login1.Session", properties); | |
508 | if (!m) | |
509 | goto finish; | |
510 | ||
511 | if (!dbus_connection_send(s->manager->bus, m, NULL)) | |
512 | goto finish; | |
513 | ||
514 | r = 0; | |
515 | ||
516 | finish: | |
517 | if (m) | |
518 | dbus_message_unref(m); | |
519 | free(p); | |
520 | ||
521 | return r; | |
522 | } | |
88e3dc90 LP |
523 | |
524 | int session_send_lock(Session *s, bool lock) { | |
525 | DBusMessage *m; | |
526 | bool b; | |
527 | char *p; | |
528 | ||
529 | assert(s); | |
530 | ||
531 | p = session_bus_path(s); | |
532 | if (!p) | |
533 | return -ENOMEM; | |
534 | ||
535 | m = dbus_message_new_signal(p, "org.freedesktop.login1.Session", lock ? "Lock" : "Unlock"); | |
536 | free(p); | |
537 | ||
538 | if (!m) | |
539 | return -ENOMEM; | |
540 | ||
541 | b = dbus_connection_send(s->manager->bus, m, NULL); | |
542 | dbus_message_unref(m); | |
543 | ||
544 | if (!b) | |
545 | return -ENOMEM; | |
546 | ||
547 | return 0; | |
548 | } |