1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
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.
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.
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/>.
23 #include <sys/socket.h>
28 #include <dbus/dbus.h>
30 #include <sys/epoll.h>
33 #include "dbus-common.h"
39 int bus_check_peercred(DBusConnection *c) {
46 assert_se(dbus_connection_get_unix_fd(c, &fd));
48 l = sizeof(struct ucred);
49 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0) {
50 log_error("SO_PEERCRED failed: %m");
54 if (l != sizeof(struct ucred)) {
55 log_error("SO_PEERCRED returned wrong size.");
59 if (ucred.uid != 0 && ucred.uid != geteuid())
65 static int sync_auth(DBusConnection *bus, DBusError *error) {
70 /* This complexity should probably move into D-Bus itself:
72 * https://bugs.freedesktop.org/show_bug.cgi?id=35189 */
74 begin = tstamp = now(CLOCK_MONOTONIC);
77 if (tstamp > begin + DEFAULT_TIMEOUT_USEC)
80 if (dbus_connection_get_is_authenticated(bus))
83 if (!dbus_connection_read_write_dispatch(bus, ((begin + DEFAULT_TIMEOUT_USEC - tstamp) + USEC_PER_MSEC - 1) / USEC_PER_MSEC))
86 tstamp = now(CLOCK_MONOTONIC);
89 if (!dbus_connection_get_is_connected(bus)) {
90 dbus_set_error_const(error, DBUS_ERROR_NO_SERVER, "Connection terminated during authentication.");
94 if (!dbus_connection_get_is_authenticated(bus)) {
95 dbus_set_error_const(error, DBUS_ERROR_TIMEOUT, "Failed to authenticate in time.");
102 int bus_connect(DBusBusType t, DBusConnection **_bus, bool *_private, DBusError *error) {
103 DBusConnection *bus = NULL;
109 if (geteuid() == 0 && t == DBUS_BUS_SYSTEM) {
110 /* If we are root, then let's talk directly to the
111 * system instance, instead of going via the bus */
113 bus = dbus_connection_open_private("unix:path=/run/systemd/private", error);
118 if (t == DBUS_BUS_SESSION) {
121 /* If we are supposed to talk to the instance,
122 * try via XDG_RUNTIME_DIR first, then
123 * fallback to normal bus access */
125 e = secure_getenv("XDG_RUNTIME_DIR");
129 if (asprintf(&p, "unix:path=%s/systemd/private", e) < 0)
132 bus = dbus_connection_open_private(p, NULL);
138 bus = dbus_bus_get_private(t, error);
146 dbus_connection_set_exit_on_disconnect(bus, FALSE);
149 if (bus_check_peercred(bus) < 0) {
150 dbus_connection_close(bus);
151 dbus_connection_unref(bus);
153 dbus_set_error_const(error, DBUS_ERROR_ACCESS_DENIED, "Failed to verify owner of bus.");
158 r = sync_auth(bus, error);
160 dbus_connection_close(bus);
161 dbus_connection_unref(bus);
172 int bus_connect_system_ssh(const char *user, const char *host, DBusConnection **_bus, DBusError *error) {
178 assert(user || host);
181 asprintf(&p, "unixexec:path=ssh,argv1=-xT,argv2=%s@%s,argv3=systemd-stdio-bridge", user, host);
183 asprintf(&p, "unixexec:path=ssh,argv1=-xT,argv2=%s@localhost,argv3=systemd-stdio-bridge", user);
185 asprintf(&p, "unixexec:path=ssh,argv1=-xT,argv2=%s,argv3=systemd-stdio-bridge", host);
188 dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL);
192 bus = dbus_connection_open_private(p, error);
198 dbus_connection_set_exit_on_disconnect(bus, FALSE);
200 if ((r = sync_auth(bus, error)) < 0) {
201 dbus_connection_close(bus);
202 dbus_connection_unref(bus);
206 if (!dbus_bus_register(bus, error)) {
207 dbus_connection_close(bus);
208 dbus_connection_unref(bus);
216 int bus_connect_system_polkit(DBusConnection **_bus, DBusError *error) {
222 /* Don't bother with PolicyKit if we are root */
224 return bus_connect(DBUS_BUS_SYSTEM, _bus, NULL, error);
226 bus = dbus_connection_open_private("unixexec:path=pkexec,argv1=" SYSTEMD_STDIO_BRIDGE_BINARY_PATH, error);
230 dbus_connection_set_exit_on_disconnect(bus, FALSE);
232 r = sync_auth(bus, error);
234 dbus_connection_close(bus);
235 dbus_connection_unref(bus);
239 if (!dbus_bus_register(bus, error)) {
240 dbus_connection_close(bus);
241 dbus_connection_unref(bus);
249 const char *bus_error_message(const DBusError *error) {
253 /* Sometimes the D-Bus server is a little bit too verbose with
254 * its error messages, so let's override them here */
255 if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED))
256 return "Access denied";
258 return error->message;
261 const char *bus_error_message_or_strerror(const DBusError *error, int err) {
263 if (error && dbus_error_is_set(error))
264 return bus_error_message(error);
266 return strerror(err);
269 DBusHandlerResult bus_default_message_handler(
271 DBusMessage *message,
272 const char *introspection,
273 const char *interfaces,
274 const BusBoundProperties *bound_properties) {
277 _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
283 dbus_error_init(&error);
285 if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) {
287 reply = dbus_message_new_method_return(message);
291 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID))
294 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && bound_properties) {
295 const char *interface, *property;
296 const BusBoundProperties *bp;
297 const BusProperty *p;
299 DBusMessageIter iter, sub;
301 if (!dbus_message_get_args(
304 DBUS_TYPE_STRING, &interface,
305 DBUS_TYPE_STRING, &property,
307 return bus_send_error_reply(c, message, &error, -EINVAL);
309 for (bp = bound_properties; bp->interface; bp++) {
310 if (!streq(bp->interface, interface))
313 for (p = bp->properties; p->property; p++)
314 if (streq(p->property, property))
319 if (!nulstr_contains(interfaces, interface))
320 dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface");
322 dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_PROPERTY, "Unknown property");
324 return bus_send_error_reply(c, message, &error, -EINVAL);
327 reply = dbus_message_new_method_return(message);
331 dbus_message_iter_init_append(reply, &iter);
333 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub))
336 data = (char*)bp->base + p->offset;
338 data = *(void**)data;
340 r = p->append(&sub, property, data);
344 return bus_send_error_reply(c, message, NULL, r);
346 if (!dbus_message_iter_close_container(&iter, &sub))
349 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && bound_properties) {
350 const char *interface;
351 const BusBoundProperties *bp;
352 const BusProperty *p;
353 DBusMessageIter iter, sub, sub2, sub3;
355 if (!dbus_message_get_args(
358 DBUS_TYPE_STRING, &interface,
360 return bus_send_error_reply(c, message, &error, -EINVAL);
362 if (interface[0] && !nulstr_contains(interfaces, interface)) {
363 dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface");
364 return bus_send_error_reply(c, message, &error, -EINVAL);
367 reply = dbus_message_new_method_return(message);
371 dbus_message_iter_init_append(reply, &iter);
373 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub))
376 for (bp = bound_properties; bp->interface; bp++) {
377 if (interface[0] && !streq(bp->interface, interface))
380 for (p = bp->properties; p->property; p++) {
383 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) ||
384 !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) ||
385 !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3))
388 data = (char*)bp->base + p->offset;
390 data = *(void**)data;
391 r = p->append(&sub3, p->property, data);
395 return bus_send_error_reply(c, message, NULL, r);
397 if (!dbus_message_iter_close_container(&sub2, &sub3) ||
398 !dbus_message_iter_close_container(&sub, &sub2))
403 if (!dbus_message_iter_close_container(&iter, &sub))
406 } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Set") && bound_properties) {
407 const char *interface, *property;
408 DBusMessageIter iter;
409 const BusBoundProperties *bp;
410 const BusProperty *p;
414 DBusMessage *changed;
416 if (!dbus_message_iter_init(message, &iter) ||
417 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
418 return bus_send_error_reply(c, message, NULL, -EINVAL);
420 dbus_message_iter_get_basic(&iter, &interface);
422 if (!dbus_message_iter_next(&iter) ||
423 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
424 return bus_send_error_reply(c, message, NULL, -EINVAL);
426 dbus_message_iter_get_basic(&iter, &property);
428 if (!dbus_message_iter_next(&iter) ||
429 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT ||
430 dbus_message_iter_has_next(&iter))
431 return bus_send_error_reply(c, message, NULL, -EINVAL);
433 for (bp = bound_properties; bp->interface; bp++) {
434 if (!streq(bp->interface, interface))
437 for (p = bp->properties; p->property; p++)
438 if (streq(p->property, property))
443 if (!nulstr_contains(interfaces, interface))
444 dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface");
446 dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_PROPERTY, "Unknown property");
448 return bus_send_error_reply(c, message, &error, -EINVAL);
452 dbus_set_error_const(&error, DBUS_ERROR_PROPERTY_READ_ONLY, "Property read-only");
453 return bus_send_error_reply(c, message, &error, -EINVAL);
456 dbus_message_iter_recurse(&iter, &sub);
458 sig = dbus_message_iter_get_signature(&sub);
462 if (!streq(sig, p->signature)) {
464 return bus_send_error_reply(c, message, NULL, -EINVAL);
468 data = (uint8_t*) bp->base + p->offset;
470 data = *(void**)data;
472 r = p->set(&sub, property, data);
476 return bus_send_error_reply(c, message, NULL, r);
478 reply = dbus_message_new_method_return(message);
482 /* Send out a signal about this, but it doesn't really
483 * matter if this fails, so eat all errors */
484 changed = bus_properties_changed_one_new(
485 dbus_message_get_path(message),
489 dbus_connection_send(c, changed, NULL);
490 dbus_message_unref(changed);
495 const char *interface = dbus_message_get_interface(message);
497 if (!interface || !nulstr_contains(interfaces, interface)) {
498 dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface");
499 return bus_send_error_reply(c, message, &error, -EINVAL);
504 if (!dbus_connection_send(c, reply, NULL))
507 return DBUS_HANDLER_RESULT_HANDLED;
510 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
513 dbus_error_free(&error);
515 return DBUS_HANDLER_RESULT_NEED_MEMORY;
518 int bus_property_append_string(DBusMessageIter *i, const char *property, void *data) {
519 const char *t = data;
527 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
533 int bus_property_append_strv(DBusMessageIter *i, const char *property, void *data) {
539 return bus_append_strv_iter(i, t);
542 int bus_property_append_bool(DBusMessageIter *i, const char *property, void *data) {
552 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
558 int bus_property_append_tristate_false(DBusMessageIter *i, const char *property, void *data) {
568 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
574 int bus_property_append_uint64(DBusMessageIter *i, const char *property, void *data) {
579 /* Let's ensure that usec_t is actually 64bit, and hence this
580 * function can be used for usec_t */
581 assert_cc(sizeof(uint64_t) == sizeof(usec_t));
583 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data))
589 int bus_property_append_uint32(DBusMessageIter *i, const char *property, void *data) {
594 /* Let's ensure that pid_t, mode_t, uid_t, gid_t are actually
595 * 32bit, and hence this function can be used for
596 * pid_t/mode_t/uid_t/gid_t */
597 assert_cc(sizeof(uint32_t) == sizeof(pid_t));
598 assert_cc(sizeof(uint32_t) == sizeof(mode_t));
599 assert_cc(sizeof(uint32_t) == sizeof(unsigned));
600 assert_cc(sizeof(uint32_t) == sizeof(uid_t));
601 assert_cc(sizeof(uint32_t) == sizeof(gid_t));
603 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
609 int bus_property_append_int32(DBusMessageIter *i, const char *property, void *data) {
614 assert_cc(sizeof(int32_t) == sizeof(int));
616 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data))
622 int bus_property_append_size(DBusMessageIter *i, const char *property, void *data) {
629 u = (uint64_t) *(size_t*) data;
631 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
637 int bus_property_append_ul(DBusMessageIter *i, const char *property, void *data) {
644 u = (uint64_t) *(unsigned long*) data;
646 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
652 int bus_property_append_long(DBusMessageIter *i, const char *property, void *data) {
659 l = (int64_t) *(long*) data;
661 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT64, &l))
667 int bus_property_set_uint64(DBusMessageIter *i, const char *property, void *data) {
673 dbus_message_iter_get_basic(i, t);
677 const char *bus_errno_to_dbus(int error) {
682 return DBUS_ERROR_INVALID_ARGS;
685 return DBUS_ERROR_NO_MEMORY;
689 return DBUS_ERROR_ACCESS_DENIED;
692 return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN;
695 return DBUS_ERROR_FILE_NOT_FOUND;
698 return DBUS_ERROR_FILE_EXISTS;
702 return DBUS_ERROR_TIMEOUT;
705 return DBUS_ERROR_IO_ERROR;
710 return DBUS_ERROR_DISCONNECTED;
713 return DBUS_ERROR_FAILED;
716 DBusHandlerResult bus_send_error_reply(DBusConnection *c, DBusMessage *message, DBusError *berror, int error) {
717 _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
718 const char *name, *text;
720 if (berror && dbus_error_is_set(berror)) {
722 text = berror->message;
724 name = bus_errno_to_dbus(error);
725 text = strerror(-error);
728 reply = dbus_message_new_error(message, name, text);
732 if (!dbus_connection_send(c, reply, NULL))
736 dbus_error_free(berror);
738 return DBUS_HANDLER_RESULT_HANDLED;
742 dbus_message_unref(reply);
745 dbus_error_free(berror);
747 return DBUS_HANDLER_RESULT_NEED_MEMORY;
750 DBusMessage* bus_properties_changed_new(const char *path, const char *interface, const char *properties) {
752 DBusMessageIter iter, sub;
758 m = dbus_message_new_signal(path, "org.freedesktop.DBus.Properties", "PropertiesChanged");
762 dbus_message_iter_init_append(m, &iter);
764 /* We won't send any property values, since they might be
765 * large and sometimes not cheap to generated */
767 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface) ||
768 !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub) ||
769 !dbus_message_iter_close_container(&iter, &sub) ||
770 !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub))
773 NULSTR_FOREACH(i, properties)
774 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &i))
777 if (!dbus_message_iter_close_container(&iter, &sub))
784 dbus_message_unref(m);
789 DBusMessage* bus_properties_changed_one_new(const char *path, const char *interface, const char *property) {
791 DBusMessageIter iter, sub;
796 m = dbus_message_new_signal(path, "org.freedesktop.DBus.Properties", "PropertiesChanged");
800 dbus_message_iter_init_append(m, &iter);
802 /* We won't send any property values, since they might be
803 * large and sometimes not cheap to generated */
805 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface) ||
806 !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub) ||
807 !dbus_message_iter_close_container(&iter, &sub) ||
808 !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub))
811 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &property))
814 if (!dbus_message_iter_close_container(&iter, &sub))
821 dbus_message_unref(m);
826 uint32_t bus_flags_to_events(DBusWatch *bus_watch) {
832 /* no watch flags for disabled watches */
833 if (!dbus_watch_get_enabled(bus_watch))
836 flags = dbus_watch_get_flags(bus_watch);
838 if (flags & DBUS_WATCH_READABLE)
840 if (flags & DBUS_WATCH_WRITABLE)
843 return events | EPOLLHUP | EPOLLERR;
846 unsigned bus_events_to_flags(uint32_t events) {
849 if (events & EPOLLIN)
850 flags |= DBUS_WATCH_READABLE;
851 if (events & EPOLLOUT)
852 flags |= DBUS_WATCH_WRITABLE;
853 if (events & EPOLLHUP)
854 flags |= DBUS_WATCH_HANGUP;
855 if (events & EPOLLERR)
856 flags |= DBUS_WATCH_ERROR;
861 int bus_parse_strv(DBusMessage *m, char ***_l) {
862 DBusMessageIter iter;
867 if (!dbus_message_iter_init(m, &iter))
870 return bus_parse_strv_iter(&iter, _l);
873 int bus_parse_strv_iter(DBusMessageIter *iter, char ***_l) {
875 unsigned n = 0, i = 0;
881 if (dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_ARRAY ||
882 dbus_message_iter_get_element_type(iter) != DBUS_TYPE_STRING)
885 dbus_message_iter_recurse(iter, &sub);
887 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
889 dbus_message_iter_next(&sub);
896 dbus_message_iter_recurse(iter, &sub);
898 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
901 assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
902 dbus_message_iter_get_basic(&sub, &s);
904 if (!(l[i++] = strdup(s))) {
909 dbus_message_iter_next(&sub);
921 int bus_append_strv_iter(DBusMessageIter *iter, char **l) {
926 if (!dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY, "s", &sub))
930 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, l))
933 if (!dbus_message_iter_close_container(iter, &sub))
939 int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
944 if (dbus_message_iter_get_arg_type(iter) != type)
947 dbus_message_iter_get_basic(iter, data);
949 if (!dbus_message_iter_next(iter) != !next)
955 int generic_print_property(const char *name, DBusMessageIter *iter, bool all) {
959 switch (dbus_message_iter_get_arg_type(iter)) {
961 case DBUS_TYPE_STRING: {
963 dbus_message_iter_get_basic(iter, &s);
965 if (all || !isempty(s))
966 printf("%s=%s\n", name, s);
971 case DBUS_TYPE_BOOLEAN: {
974 dbus_message_iter_get_basic(iter, &b);
975 printf("%s=%s\n", name, yes_no(b));
980 case DBUS_TYPE_UINT64: {
982 dbus_message_iter_get_basic(iter, &u);
984 /* Yes, heuristics! But we can change this check
985 * should it turn out to not be sufficient */
987 if (endswith(name, "Timestamp")) {
988 char timestamp[FORMAT_TIMESTAMP_MAX], *t;
990 t = format_timestamp(timestamp, sizeof(timestamp), u);
992 printf("%s=%s\n", name, strempty(t));
994 } else if (strstr(name, "USec")) {
995 char timespan[FORMAT_TIMESPAN_MAX];
997 printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
999 printf("%s=%llu\n", name, (unsigned long long) u);
1004 case DBUS_TYPE_UINT32: {
1006 dbus_message_iter_get_basic(iter, &u);
1008 if (strstr(name, "UMask") || strstr(name, "Mode"))
1009 printf("%s=%04o\n", name, u);
1011 printf("%s=%u\n", name, (unsigned) u);
1016 case DBUS_TYPE_INT32: {
1018 dbus_message_iter_get_basic(iter, &i);
1020 printf("%s=%i\n", name, (int) i);
1024 case DBUS_TYPE_DOUBLE: {
1026 dbus_message_iter_get_basic(iter, &d);
1028 printf("%s=%g\n", name, d);
1032 case DBUS_TYPE_ARRAY:
1034 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
1035 DBusMessageIter sub;
1038 dbus_message_iter_recurse(iter, &sub);
1040 dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1041 printf("%s=", name);
1043 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1046 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
1047 dbus_message_iter_get_basic(&sub, &s);
1048 printf("%s%s", space ? " " : "", s);
1051 dbus_message_iter_next(&sub);
1059 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
1060 DBusMessageIter sub;
1062 dbus_message_iter_recurse(iter, &sub);
1064 dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1065 printf("%s=", name);
1067 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1070 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
1071 dbus_message_iter_get_basic(&sub, &u);
1074 dbus_message_iter_next(&sub);
1082 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_UINT32) {
1083 DBusMessageIter sub;
1085 dbus_message_iter_recurse(iter, &sub);
1087 dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1088 printf("%s=", name);
1090 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1093 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32);
1094 dbus_message_iter_get_basic(&sub, &u);
1097 dbus_message_iter_next(&sub);
1112 static void release_name_pending_cb(DBusPendingCall *pending, void *userdata) {
1114 DBusConnection *bus = userdata;
1116 assert_se(reply = dbus_pending_call_steal_reply(pending));
1117 dbus_message_unref(reply);
1119 dbus_connection_close(bus);
1122 void bus_async_unregister_and_exit(DBusConnection *bus, const char *name) {
1123 _cleanup_dbus_message_unref_ DBusMessage *m = NULL;
1124 DBusPendingCall *pending = NULL;
1128 /* We unregister the name here, but we continue to process
1129 * requests, until we get the response for it, so that all
1130 * requests are guaranteed to be processed. */
1132 m = dbus_message_new_method_call(
1135 DBUS_INTERFACE_DBUS,
1140 if (!dbus_message_append_args(
1147 if (!dbus_connection_send_with_reply(bus, m, &pending, -1))
1150 if (!dbus_pending_call_set_notify(pending, release_name_pending_cb, bus, NULL))
1153 dbus_pending_call_unref(pending);
1161 dbus_pending_call_cancel(pending);
1162 dbus_pending_call_unref(pending);
1166 DBusHandlerResult bus_exit_idle_filter(DBusConnection *bus, DBusMessage *m, void *userdata) {
1167 usec_t *remain_until = userdata;
1171 assert(remain_until);
1173 /* Every time we get a new message we reset out timeout */
1174 *remain_until = now(CLOCK_MONOTONIC) + DEFAULT_EXIT_USEC;
1176 if (dbus_message_is_signal(m, DBUS_INTERFACE_LOCAL, "Disconnected"))
1177 dbus_connection_close(bus);
1179 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1182 /* This mimics dbus_bus_get_unix_user() */
1183 pid_t bus_get_unix_process_id(
1184 DBusConnection *connection,
1188 _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
1191 m = dbus_message_new_method_call(
1194 DBUS_INTERFACE_DBUS,
1195 "GetConnectionUnixProcessID");
1197 dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL);
1201 if (!dbus_message_append_args(
1203 DBUS_TYPE_STRING, &name,
1204 DBUS_TYPE_INVALID)) {
1205 dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL);
1209 reply = dbus_connection_send_with_reply_and_block(connection, m, -1, error);
1213 if (dbus_set_error_from_message(error, reply))
1216 if (!dbus_message_get_args(
1218 DBUS_TYPE_UINT32, &pid,
1225 bool bus_error_is_no_service(const DBusError *error) {
1228 if (!dbus_error_is_set(error))
1231 if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
1234 if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
1237 return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
1240 int bus_method_call_with_reply(
1241 DBusConnection *bus,
1242 const char *destination,
1244 const char *interface,
1246 DBusMessage **return_reply,
1247 DBusError *return_error,
1248 int first_arg_type, ...) {
1251 _cleanup_dbus_message_unref_ DBusMessage *m = NULL;
1256 dbus_error_init(&error);
1259 m = dbus_message_new_method_call(destination, path, interface, method);
1265 va_start(ap, first_arg_type);
1266 if (!dbus_message_append_args_valist(m, first_arg_type, ap)) {
1273 reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
1276 log_error("Failed to issue method call: %s", bus_error_message(&error));
1278 if (bus_error_is_no_service(&error))
1280 else if (dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED))
1282 else if (dbus_error_has_name(&error, DBUS_ERROR_NO_REPLY))
1290 *return_reply = reply;
1292 dbus_message_unref(reply);
1296 *return_error = error;
1298 dbus_error_free(&error);
1303 void bus_message_unrefp(DBusMessage **reply) {
1310 dbus_message_unref(*reply);
1313 const char *bus_message_get_sender_with_fallback(DBusMessage *m) {
1318 s = dbus_message_get_sender(m);
1322 /* When the message came in from a direct connection the
1323 * message will have no sender. We fix that here. */
1325 return ":no-sender";