1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include <dbus/dbus.h>
26 #include <sys/types.h>
28 #ifndef DBUS_ERROR_UNKNOWN_OBJECT
29 #define DBUS_ERROR_UNKNOWN_OBJECT "org.freedesktop.DBus.Error.UnknownObject"
32 #ifndef DBUS_ERROR_UNKNOWN_INTERFACE
33 #define DBUS_ERROR_UNKNOWN_INTERFACE "org.freedesktop.DBus.Error.UnknownInterface"
36 #ifndef DBUS_ERROR_UNKNOWN_PROPERTY
37 #define DBUS_ERROR_UNKNOWN_PROPERTY "org.freedesktop.DBus.Error.UnknownProperty"
40 #ifndef DBUS_ERROR_PROPERTY_READ_ONLY
41 #define DBUS_ERROR_PROPERTY_READ_ONLY "org.freedesktop.DBus.Error.PropertyReadOnly"
44 #define BUS_PROPERTIES_INTERFACE \
45 " <interface name=\"org.freedesktop.DBus.Properties\">\n" \
46 " <method name=\"Get\">\n" \
47 " <arg name=\"interface\" direction=\"in\" type=\"s\"/>\n" \
48 " <arg name=\"property\" direction=\"in\" type=\"s\"/>\n" \
49 " <arg name=\"value\" direction=\"out\" type=\"v\"/>\n" \
51 " <method name=\"GetAll\">\n" \
52 " <arg name=\"interface\" direction=\"in\" type=\"s\"/>\n" \
53 " <arg name=\"properties\" direction=\"out\" type=\"a{sv}\"/>\n" \
55 " <method name=\"Set\">\n" \
56 " <arg name=\"interface\" direction=\"in\" type=\"s\"/>\n" \
57 " <arg name=\"property\" direction=\"in\" type=\"s\"/>\n" \
58 " <arg name=\"value\" direction=\"in\" type=\"v\"/>\n" \
60 " <signal name=\"PropertiesChanged\">\n" \
61 " <arg type=\"s\" name=\"interface\"/>\n" \
62 " <arg type=\"a{sv}\" name=\"changed_properties\"/>\n" \
63 " <arg type=\"as\" name=\"invalidated_properties\"/>\n" \
67 #define BUS_INTROSPECTABLE_INTERFACE \
68 " <interface name=\"org.freedesktop.DBus.Introspectable\">\n" \
69 " <method name=\"Introspect\">\n" \
70 " <arg name=\"data\" type=\"s\" direction=\"out\"/>\n" \
74 #define BUS_PEER_INTERFACE \
75 "<interface name=\"org.freedesktop.DBus.Peer\">\n" \
76 " <method name=\"Ping\"/>\n" \
77 " <method name=\"GetMachineId\">\n" \
78 " <arg type=\"s\" name=\"machine_uuid\" direction=\"out\"/>\n" \
82 #define BUS_GENERIC_INTERFACES_LIST \
83 "org.freedesktop.DBus.Properties\0" \
84 "org.freedesktop.DBus.Introspectable\0" \
85 "org.freedesktop.DBus.Peer\0"
87 int bus_check_peercred(DBusConnection *c);
89 int bus_connect(DBusBusType t, DBusConnection **_bus, bool *private_bus, DBusError *error);
91 int bus_connect_system_ssh(const char *user, const char *host, DBusConnection **_bus, DBusError *error);
92 int bus_connect_system_polkit(DBusConnection **_bus, DBusError *error);
94 const char *bus_error_message(const DBusError *error);
95 const char *bus_error_message_or_strerror(const DBusError *error, int err);
97 typedef int (*BusPropertyCallback)(DBusMessageIter *iter, const char *property, void *data);
98 typedef int (*BusPropertySetCallback)(DBusMessageIter *iter, const char *property, void *data);
100 typedef struct BusProperty {
101 const char *property; /* name of the property */
102 BusPropertyCallback append; /* Function that is called to serialize this property */
103 const char *signature;
104 const uint16_t offset; /* Offset from BusBoundProperties::base address to the property data.
105 * uint16_t is sufficient, because we have no structs too big.
106 * -Werror=overflow will catch it if this does not hold. */
107 bool indirect; /* data is indirect, ie. not base+offset, but *(base+offset) */
108 BusPropertySetCallback set; /* Optional: Function that is called to set this property */
111 typedef struct BusBoundProperties {
112 const char *interface; /* interface of the properties */
113 const BusProperty *properties; /* array of properties, ended by a NULL-filled element */
114 const void *const base; /* base pointer to which the offset must be added to reach data */
115 } BusBoundProperties;
117 dbus_bool_t bus_maybe_send_reply (DBusConnection *c,
118 DBusMessage *message,
121 DBusHandlerResult bus_send_error_reply(
123 DBusMessage *message,
124 DBusError *bus_error,
127 DBusHandlerResult bus_default_message_handler(
129 DBusMessage *message,
130 const char *introspection,
131 const char *interfaces,
132 const BusBoundProperties *bound_properties);
134 int bus_property_append_string(DBusMessageIter *i, const char *property, void *data);
135 int bus_property_append_strv(DBusMessageIter *i, const char *property, void *data);
136 int bus_property_append_bool(DBusMessageIter *i, const char *property, void *data);
137 int bus_property_append_tristate_false(DBusMessageIter *i, const char *property, void *data);
138 int bus_property_append_int32(DBusMessageIter *i, const char *property, void *data);
139 int bus_property_append_uint32(DBusMessageIter *i, const char *property, void *data);
140 int bus_property_append_uint64(DBusMessageIter *i, const char *property, void *data);
141 int bus_property_append_size(DBusMessageIter *i, const char *property, void *data);
142 int bus_property_append_ul(DBusMessageIter *i, const char *property, void *data);
143 int bus_property_append_long(DBusMessageIter *i, const char *property, void *data);
145 #define bus_property_append_int bus_property_append_int32
146 #define bus_property_append_pid bus_property_append_uint32
147 #define bus_property_append_uid bus_property_append_uint32
148 #define bus_property_append_gid bus_property_append_uint32
149 #define bus_property_append_mode bus_property_append_uint32
150 #define bus_property_append_unsigned bus_property_append_uint32
151 #define bus_property_append_usec bus_property_append_uint64
153 int bus_property_set_uint64(DBusMessageIter *i, const char *property, void *data);
154 #define bus_property_set_usec bus_property_set_uint64
156 #define DEFINE_BUS_PROPERTY_APPEND_ENUM(function,name,type) \
157 int function(DBusMessageIter *i, const char *property, void *data) { \
159 type *field = data; \
164 value = strempty(name##_to_string(*field)); \
166 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &value)) \
172 #define DEFINE_BUS_PROPERTY_SET_ENUM(function,name,type) \
173 int function(DBusMessageIter *i, const char *property, void *data) { \
175 type f, *field = data; \
180 dbus_message_iter_get_basic(i, &value); \
182 f = name##_from_string(value); \
190 const char *bus_errno_to_dbus(int error);
192 DBusMessage* bus_properties_changed_new(const char *path, const char *interface, const char *properties);
193 DBusMessage* bus_properties_changed_one_new(const char *path, const char *interface, const char *property);
195 uint32_t bus_flags_to_events(DBusWatch *bus_watch);
196 unsigned bus_events_to_flags(uint32_t events);
198 int bus_parse_strv(DBusMessage *m, char ***_l);
199 int bus_parse_strv_iter(DBusMessageIter *iter, char ***_l);
200 int bus_parse_strv_pairs_iter(DBusMessageIter *iter, char ***_l);
204 const char *description;
205 const char *load_state;
206 const char *active_state;
207 const char *sub_state;
208 const char *following;
209 const char *unit_path;
211 const char *job_type;
212 const char *job_path;
215 int bus_parse_unit_info(DBusMessageIter *iter, struct unit_info *u);
217 int bus_append_strv_iter(DBusMessageIter *iter, char **l);
219 int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next);
221 int generic_print_property(const char *name, DBusMessageIter *iter, bool all);
223 void bus_async_unregister_and_exit(DBusConnection *bus, const char *name);
225 DBusHandlerResult bus_exit_idle_filter(DBusConnection *bus, DBusMessage *m, void *userdata);
227 pid_t bus_get_unix_process_id(DBusConnection *connection, const char *name, DBusError *error);
229 bool bus_error_is_no_service(const DBusError *error);
230 int bus_method_call_with_reply(DBusConnection *bus,
231 const char *destination,
233 const char *interface,
235 DBusMessage **return_reply,
236 DBusError *return_error,
237 int first_arg_type, ...);
239 const char *bus_message_get_sender_with_fallback(DBusMessage *m);
241 void bus_message_unrefp(DBusMessage **reply);
243 #define _cleanup_dbus_message_unref_ __attribute__((cleanup(bus_message_unrefp)))
244 #define _cleanup_dbus_error_free_ __attribute__((cleanup(dbus_error_free)))