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dbus: add dbus introspection extraction
[thirdparty/systemd.git] / src / logind-dbus.c
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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
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 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 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
22#include "logind.h"
23#include "dbus-common.h"
24
25#define BUS_MANAGER_INTERFACE \
26 " <interface name=\"org.freedesktop.login1.Manager\">\n" \
27 " <method name=\"GetSeat\">\n" \
28 " <arg name=\"id\" type=\"s\" direction=\"in\"/>\n" \
29 " <arg name=\"seat\" type=\"o\" direction=\"out\"/>\n" \
30 " </method>\n" \
31 " <method name=\"GetUser\">\n" \
32 " <arg name=\"uid\" type=\"t\" direction=\"in\"/>\n" \
33 " <arg name=\"user\" type=\"o\" direction=\"out\"/>\n" \
34 " </method>\n" \
35 " <method name=\"GetSession\">\n" \
36 " <arg name=\"id\" type=\"s\" direction=\"in\"/>\n" \
37 " <arg name=\"session\" type=\"o\" direction=\"out\"/>\n" \
38 " </method>\n" \
39 " <method name=\"ListSeats\">\n" \
40 " <arg name=\"seats\" type=\"a(so)\" direction=\"out\"/>\n" \
41 " </method>\n" \
42 " <method name=\"ListUsers\">\n" \
43 " <arg name=\"users\" type=\"a(uso)\" direction=\"out\"/>\n" \
44 " </method>\n" \
45 " <method name=\"ListSessions\">\n" \
46 " <arg name=\"users\" type=\"a(sussso)\" direction=\"out\"/>\n" \
47 " </method>\n" \
48 " <method name=\"CreateSession\">\n" \
49 " <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n" \
50 " <arg name=\"leader\" type=\"u\" direction=\"in\"/>\n" \
51 " <arg name=\"type\" type=\"s\" direction=\"in\"/>\n" \
52 " <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n" \
53 " <arg name=\"tty\" type=\"s\" direction=\"in\"/>\n" \
54 " <arg name=\"display\" type=\"s\" direction=\"in\"/>\n" \
55 " <arg name=\"remote\" type=\"b\" direction=\"in\"/>\n" \
56 " <arg name=\"remote_user\" type=\"s\" direction=\"in\"/>\n" \
57 " <arg name=\"remote_host\" type=\"s\" direction=\"in\"/>\n" \
58 " <arg name=\"controllers\" type=\"as\" direction=\"in\"/>\n" \
59 " <arg name=\"reset_controllers\" type=\"as\" direction=\"in\"/>\n" \
60 " <arg name=\"kill_processes\" type=\"as\" direction=\"in\"/>\n" \
61 " <arg name=\"id\" type=\"s\" direction=\"out\"/>\n" \
62 " <arg name=\"path\" type=\"o\" direction=\"out\"/>\n" \
63 " <arg name=\"fd\" type=\"h\" direction=\"out\"/>\n" \
64 " </method>\n" \
65 " <method name=\"TerminateSession\">\n" \
66 " <arg name=\"id\" type=\"s\" direction=\"in\"/>\n" \
67 " </method>\n" \
68 " <method name=\"TerminateUser\">\n" \
69 " <arg name=\"uid\" type=\"t\" direction=\"in\"/>\n" \
70 " </method>\n" \
71 " <method name=\"TerminateSeat\">\n" \
72 " <arg name=\"id\" type=\"s\" direction=\"in\"/>\n" \
73 " </method>\n" \
74 " <signal name=\"SessionNew\">\n" \
75 " <arg name=\"id\" type=\"s\"/>\n" \
76 " <arg name=\"path\" type=\"o\"/>\n" \
77 " </signal>\n" \
78 " <signal name=\"SessionRemoved\">\n" \
79 " <arg name=\"id\" type=\"s\"/>\n" \
80 " <arg name=\"path\" type=\"o\"/>\n" \
81 " </signal>\n" \
82 " <signal name=\"UserNew\">\n" \
83 " <arg name=\"uid\" type=\"u\"/>\n" \
84 " <arg name=\"path\" type=\"o\"/>\n" \
85 " </signal>\n" \
86 " <signal name=\"UserRemoved\">\n" \
87 " <arg name=\"uid\" type=\"u\"/>\n" \
88 " <arg name=\"path\" type=\"o\"/>\n" \
89 " </signal>\n" \
90 " <signal name=\"SeatNew\">\n" \
91 " <arg name=\"id\" type=\"s\"/>\n" \
92 " <arg name=\"path\" type=\"o\"/>\n" \
93 " </signal>\n" \
94 " <signal name=\"SeatRemoved\">\n" \
95 " <arg name=\"id\" type=\"s\"/>\n" \
96 " <arg name=\"path\" type=\"o\"/>\n" \
97 " </signal>\n" \
98 " <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
99 " <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \
100 " <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \
101 " <property name=\"NAutoVTs\" type=\"u\" access=\"read\"/>\n" \
102 " <property name=\"KillOnlyUsers\" type=\"as\" access=\"read\"/>\n" \
103 " <property name=\"KillExcludeUsers\" type=\"as\" access=\"read\"/>\n" \
104 " <property name=\"KillUserProcesses\" type=\"b\" access=\"read\"/>\n" \
105 " </interface>\n"
106
107#define INTROSPECTION_BEGIN \
108 DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
109 "<node>\n" \
110 BUS_MANAGER_INTERFACE \
111 BUS_PROPERTIES_INTERFACE \
112 BUS_PEER_INTERFACE \
113 BUS_INTROSPECTABLE_INTERFACE
114
115#define INTROSPECTION_END \
116 "</node>\n"
117
118#define INTERFACES_LIST \
119 BUS_GENERIC_INTERFACES_LIST \
120 "org.freedesktop.login1.Manager\0"
121
122static DBusHandlerResult manager_message_handler(
123 DBusConnection *connection,
124 DBusMessage *message,
125 void *userdata) {
126
127 Manager *m = userdata;
128
129 const BusProperty properties[] = {
130 { "org.freedesktop.login1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_path },
131 { "org.freedesktop.login1.Manager", "Controllers", bus_property_append_strv, "as", m->controllers },
132 { "org.freedesktop.login1.Manager", "ResetControllers", bus_property_append_strv, "as", m->reset_controllers },
133 { "org.freedesktop.login1.Manager", "NAutoVTs", bus_property_append_unsigned, "u", &m->n_autovts },
134 { "org.freedesktop.login1.Manager", "KillOnlyUsers", bus_property_append_strv, "as", m->kill_only_users },
135 { "org.freedesktop.login1.Manager", "KillExcludeUsers", bus_property_append_strv, "as", m->kill_exclude_users },
136 { "org.freedesktop.login1.Manager", "KillUserProcesses", bus_property_append_bool, "b", &m->kill_user_processes },
137 { NULL, NULL, NULL, NULL, NULL }
138 };
139
140 DBusError error;
141 DBusMessage *reply = NULL;
142
143 assert(connection);
144 assert(message);
145 assert(m);
146
147 dbus_error_init(&error);
148
149 if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
150 char *introspection = NULL;
151 FILE *f;
152 Iterator i;
153 Session *session;
154 Seat *seat;
155 User *user;
156 size_t size;
157 char *p;
158
159 if (!(reply = dbus_message_new_method_return(message)))
160 goto oom;
161
162 /* We roll our own introspection code here, instead of
163 * relying on bus_default_message_handler() because we
164 * need to generate our introspection string
165 * dynamically. */
166
167 if (!(f = open_memstream(&introspection, &size)))
168 goto oom;
169
170 fputs(INTROSPECTION_BEGIN, f);
171
172 HASHMAP_FOREACH(seat, m->seats, i) {
173 p = bus_path_escape(seat->id);
174
175 if (p) {
176 fprintf(f, "<node name=\"seat/%s\"/>", p);
177 free(p);
178 }
179 }
180
181 HASHMAP_FOREACH(user, m->users, i)
182 fprintf(f, "<node name=\"user/%llu\"/>", (unsigned long long) user->uid);
183
184 HASHMAP_FOREACH(session, m->sessions, i) {
185 p = bus_path_escape(session->id);
186
187 if (p) {
188 fprintf(f, "<node name=\"session/%s\"/>", p);
189 free(p);
190 }
191 }
192
193 fputs(INTROSPECTION_END, f);
194
195 if (ferror(f)) {
196 fclose(f);
197 free(introspection);
198 goto oom;
199 }
200
201 fclose(f);
202
203 if (!introspection)
204 goto oom;
205
206 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
207 free(introspection);
208 goto oom;
209 }
210
211 free(introspection);
212 } else
213 return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, properties);
214
215 if (reply) {
216 if (!dbus_connection_send(connection, reply, NULL))
217 goto oom;
218
219 dbus_message_unref(reply);
220 }
221
222 return DBUS_HANDLER_RESULT_HANDLED;
223
224oom:
225 if (reply)
226 dbus_message_unref(reply);
227
228 dbus_error_free(&error);
229
230 return DBUS_HANDLER_RESULT_NEED_MEMORY;
231}
232
233const DBusObjectPathVTable bus_manager_vtable = {
234 .message_function = manager_message_handler
235};
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