return 0;
}
+
+#define make_expression(sender, path, interface, member) \
+ strjoina( \
+ "type='signal'", \
+ sender ? ",sender='" : "", \
+ sender ?: "", \
+ sender ? "'" : "", \
+ path ? ",path='" : "", \
+ path ?: "", \
+ path ? "'" : "", \
+ interface ? ",interface='" : "", \
+ interface ?: "", \
+ interface ? "'" : "", \
+ member ? ",member='" : "", \
+ member ?: "", \
+ member ? "'" : "" \
+ )
+
+_public_ int sd_bus_match_signal(
+ sd_bus *bus,
+ sd_bus_slot **ret,
+ const char *sender,
+ const char *path,
+ const char *interface,
+ const char *member,
+ sd_bus_message_handler_t callback,
+ void *userdata) {
+
+ const char *expression;
+
+ assert_return(bus, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+ assert_return(!sender || service_name_is_valid(sender), -EINVAL);
+ assert_return(!path || object_path_is_valid(path), -EINVAL);
+ assert_return(!interface || interface_name_is_valid(interface), -EINVAL);
+ assert_return(!member || member_name_is_valid(member), -EINVAL);
+
+ expression = make_expression(sender, path, interface, member);
+
+ return sd_bus_add_match(bus, ret, expression, callback, userdata);
+}
+
+_public_ int sd_bus_match_signal_async(
+ sd_bus *bus,
+ sd_bus_slot **ret,
+ const char *sender,
+ const char *path,
+ const char *interface,
+ const char *member,
+ sd_bus_message_handler_t callback,
+ sd_bus_message_handler_t install_callback,
+ void *userdata) {
+
+ const char *expression;
+
+ assert_return(bus, -EINVAL);
+ assert_return(!bus_pid_changed(bus), -ECHILD);
+ assert_return(!sender || service_name_is_valid(sender), -EINVAL);
+ assert_return(!path || object_path_is_valid(path), -EINVAL);
+ assert_return(!interface || interface_name_is_valid(interface), -EINVAL);
+ assert_return(!member || member_name_is_valid(member), -EINVAL);
+
+ expression = make_expression(sender, path, interface, member);
+
+ return sd_bus_add_match_async(bus, ret, expression, callback, install_callback, userdata);
+}
int sd_bus_query_sender_creds(sd_bus_message *call, uint64_t mask, sd_bus_creds **creds);
int sd_bus_query_sender_privilege(sd_bus_message *call, int capability);
+int sd_bus_match_signal(sd_bus *bus, sd_bus_slot **ret, const char *sender, const char *path, const char *interface, const char *member, sd_bus_message_handler_t callback, void *userdata);
+int sd_bus_match_signal_async(sd_bus *bus, sd_bus_slot **ret, const char *sender, const char *path, const char *interface, const char *member, sd_bus_message_handler_t match_callback, sd_bus_message_handler_t add_callback, void *userdata);
+
/* Credential handling */
int sd_bus_creds_new_from_pid(sd_bus_creds **ret, pid_t pid, uint64_t creds_mask);