/
SDL_dbus.c
347 lines (310 loc) · 11.4 KB
1
2
/*
Simple DirectMedia Layer
3
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#include "SDL_dbus.h"
#if SDL_USE_LIBDBUS
/* we never link directly to libdbus. */
#include "SDL_loadso.h"
static const char *dbus_library = "libdbus-1.so.3";
static void *dbus_handle = NULL;
static unsigned int screensaver_cookie = 0;
30
static SDL_DBusContext dbus;
31
32
33
34
35
static int
LoadDBUSSyms(void)
{
#define SDL_DBUS_SYM2(x, y) \
36
if (!(dbus.x = SDL_LoadFunction(dbus_handle, #y))) return -1
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
#define SDL_DBUS_SYM(x) \
SDL_DBUS_SYM2(x, dbus_##x)
SDL_DBUS_SYM(bus_get_private);
SDL_DBUS_SYM(bus_register);
SDL_DBUS_SYM(bus_add_match);
SDL_DBUS_SYM(connection_open_private);
SDL_DBUS_SYM(connection_set_exit_on_disconnect);
SDL_DBUS_SYM(connection_get_is_connected);
SDL_DBUS_SYM(connection_add_filter);
SDL_DBUS_SYM(connection_try_register_object_path);
SDL_DBUS_SYM(connection_send);
SDL_DBUS_SYM(connection_send_with_reply_and_block);
SDL_DBUS_SYM(connection_close);
SDL_DBUS_SYM(connection_unref);
SDL_DBUS_SYM(connection_flush);
SDL_DBUS_SYM(connection_read_write);
SDL_DBUS_SYM(connection_dispatch);
SDL_DBUS_SYM(message_is_signal);
SDL_DBUS_SYM(message_new_method_call);
SDL_DBUS_SYM(message_append_args);
59
SDL_DBUS_SYM(message_append_args_valist);
60
SDL_DBUS_SYM(message_get_args);
61
SDL_DBUS_SYM(message_get_args_valist);
62
63
64
65
66
67
68
69
70
71
72
SDL_DBUS_SYM(message_iter_init);
SDL_DBUS_SYM(message_iter_next);
SDL_DBUS_SYM(message_iter_get_basic);
SDL_DBUS_SYM(message_iter_get_arg_type);
SDL_DBUS_SYM(message_iter_recurse);
SDL_DBUS_SYM(message_unref);
SDL_DBUS_SYM(error_init);
SDL_DBUS_SYM(error_is_set);
SDL_DBUS_SYM(error_free);
SDL_DBUS_SYM(get_local_machine_id);
SDL_DBUS_SYM(free);
73
SDL_DBUS_SYM(free_string_array);
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
SDL_DBUS_SYM(shutdown);
#undef SDL_DBUS_SYM
#undef SDL_DBUS_SYM2
return 0;
}
static void
UnloadDBUSLibrary(void)
{
if (dbus_handle != NULL) {
SDL_UnloadObject(dbus_handle);
dbus_handle = NULL;
}
}
static int
LoadDBUSLibrary(void)
{
int retval = 0;
if (dbus_handle == NULL) {
dbus_handle = SDL_LoadObject(dbus_library);
if (dbus_handle == NULL) {
retval = -1;
/* Don't call SDL_SetError(): SDL_LoadObject already did. */
} else {
retval = LoadDBUSSyms();
if (retval < 0) {
UnloadDBUSLibrary();
}
}
}
return retval;
}
void
SDL_DBus_Init(void)
{
if (!dbus.session_conn && LoadDBUSLibrary() != -1) {
DBusError err;
dbus.error_init(&err);
dbus.session_conn = dbus.bus_get_private(DBUS_BUS_SESSION, &err);
118
119
120
if (!dbus.error_is_set(&err)) {
dbus.system_conn = dbus.bus_get_private(DBUS_BUS_SYSTEM, &err);
}
121
122
if (dbus.error_is_set(&err)) {
dbus.error_free(&err);
123
SDL_DBus_Quit();
124
125
return; /* oh well */
}
126
dbus.connection_set_exit_on_disconnect(dbus.system_conn, 0);
127
128
129
130
131
132
133
dbus.connection_set_exit_on_disconnect(dbus.session_conn, 0);
}
}
void
SDL_DBus_Quit(void)
{
134
135
136
137
if (dbus.system_conn) {
dbus.connection_close(dbus.system_conn);
dbus.connection_unref(dbus.system_conn);
}
138
139
140
if (dbus.session_conn) {
dbus.connection_close(dbus.session_conn);
dbus.connection_unref(dbus.session_conn);
142
143
144
145
/* Don't do this - bug 3950
dbus_shutdown() is a debug feature which closes all global resources in the dbus library. Calling this should be done by the app, not a library, because if there are multiple users of dbus in the process then SDL could shut it down even though another part is using it.
*/
#if 0
146
if (dbus.shutdown) {
147
148
dbus.shutdown();
}
150
SDL_zero(dbus);
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
UnloadDBUSLibrary();
}
SDL_DBusContext *
SDL_DBus_GetContext(void)
{
if(!dbus_handle || !dbus.session_conn){
SDL_DBus_Init();
}
if(dbus_handle && dbus.session_conn){
return &dbus;
} else {
return NULL;
}
}
168
169
static SDL_bool
SDL_DBus_CallMethodInternal(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, va_list ap)
171
172
173
174
175
SDL_bool retval = SDL_FALSE;
if (conn) {
DBusMessage *msg = dbus.message_new_method_call(node, path, interface, method);
if (msg) {
176
177
178
179
int firstarg;
va_list ap_reply;
va_copy(ap_reply, ap); /* copy the arg list so we don't compete with D-Bus for it */
firstarg = va_arg(ap, int);
180
181
182
if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_append_args_valist(msg, firstarg, ap)) {
DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
if (reply) {
183
184
185
186
187
188
189
190
191
192
/* skip any input args, get to output args. */
while ((firstarg = va_arg(ap_reply, int)) != DBUS_TYPE_INVALID) {
/* we assume D-Bus already validated all this. */
{ void *dumpptr = va_arg(ap_reply, void*); (void) dumpptr; }
if (firstarg == DBUS_TYPE_ARRAY) {
{ const int dumpint = va_arg(ap_reply, int); (void) dumpint; }
}
}
firstarg = va_arg(ap_reply, int);
if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_get_args_valist(reply, NULL, firstarg, ap_reply)) {
193
194
195
196
retval = SDL_TRUE;
}
dbus.message_unref(reply);
}
198
va_end(ap_reply);
199
200
201
dbus.message_unref(msg);
}
}
202
203
return retval;
204
205
206
}
SDL_bool
207
SDL_DBus_CallMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...)
209
210
211
212
213
214
215
SDL_bool retval;
va_list ap;
va_start(ap, method);
retval = SDL_DBus_CallMethodInternal(conn, node, path, interface, method, ap);
va_end(ap);
return retval;
}
217
218
219
220
221
222
223
224
225
226
SDL_bool
SDL_DBus_CallMethod(const char *node, const char *path, const char *interface, const char *method, ...)
{
SDL_bool retval;
va_list ap;
va_start(ap, method);
retval = SDL_DBus_CallMethodInternal(dbus.session_conn, node, path, interface, method, ap);
va_end(ap);
return retval;
}
228
229
230
231
static SDL_bool
SDL_DBus_CallVoidMethodInternal(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, va_list ap)
{
SDL_bool retval = SDL_FALSE;
233
234
235
236
237
238
239
240
241
242
243
244
if (conn) {
DBusMessage *msg = dbus.message_new_method_call(node, path, interface, method);
if (msg) {
int firstarg = va_arg(ap, int);
if ((firstarg == DBUS_TYPE_INVALID) || dbus.message_append_args_valist(msg, firstarg, ap)) {
if (dbus.connection_send(conn, msg, NULL)) {
dbus.connection_flush(conn);
retval = SDL_TRUE;
}
}
dbus.message_unref(msg);
248
249
return retval;
}
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
SDL_bool
SDL_DBus_CallVoidMethodOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *method, ...)
{
SDL_bool retval;
va_list ap;
va_start(ap, method);
retval = SDL_DBus_CallVoidMethodInternal(conn, node, path, interface, method, ap);
va_end(ap);
return retval;
}
SDL_bool
SDL_DBus_CallVoidMethod(const char *node, const char *path, const char *interface, const char *method, ...)
{
SDL_bool retval;
va_list ap;
va_start(ap, method);
retval = SDL_DBus_CallVoidMethodInternal(dbus.session_conn, node, path, interface, method, ap);
va_end(ap);
return retval;
}
SDL_bool
SDL_DBus_QueryPropertyOnConnection(DBusConnection *conn, const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result)
{
SDL_bool retval = SDL_FALSE;
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
if (conn) {
DBusMessage *msg = dbus.message_new_method_call(node, path, "org.freedesktop.DBus.Properties", "Get");
if (msg) {
if (dbus.message_append_args(msg, DBUS_TYPE_STRING, &interface, DBUS_TYPE_STRING, &property, DBUS_TYPE_INVALID)) {
DBusMessage *reply = dbus.connection_send_with_reply_and_block(conn, msg, 300, NULL);
if (reply) {
DBusMessageIter iter, sub;
dbus.message_iter_init(reply, &iter);
if (dbus.message_iter_get_arg_type(&iter) == DBUS_TYPE_VARIANT) {
dbus.message_iter_recurse(&iter, &sub);
if (dbus.message_iter_get_arg_type(&sub) == expectedtype) {
dbus.message_iter_get_basic(&sub, result);
retval = SDL_TRUE;
}
}
dbus.message_unref(reply);
}
}
296
297
dbus.message_unref(msg);
}
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
return retval;
}
SDL_bool
SDL_DBus_QueryProperty(const char *node, const char *path, const char *interface, const char *property, const int expectedtype, void *result)
{
return SDL_DBus_QueryPropertyOnConnection(dbus.session_conn, node, path, interface, property, expectedtype, result);
}
void
SDL_DBus_ScreensaverTickle(void)
{
SDL_DBus_CallVoidMethod("org.gnome.ScreenSaver", "/org/gnome/ScreenSaver", "org.gnome.ScreenSaver", "SimulateUserActivity", DBUS_TYPE_INVALID);
}
SDL_bool
SDL_DBus_ScreensaverInhibit(SDL_bool inhibit)
{
if ( (inhibit && (screensaver_cookie != 0)) || (!inhibit && (screensaver_cookie == 0)) ) {
320
321
return SDL_TRUE;
} else {
322
323
324
325
326
327
328
329
330
331
332
const char *node = "org.freedesktop.ScreenSaver";
const char *path = "/org/freedesktop/ScreenSaver";
const char *interface = "org.freedesktop.ScreenSaver";
if (inhibit) {
const char *app = "My SDL application";
const char *reason = "Playing a game";
if (!SDL_DBus_CallMethod(node, path, interface, "Inhibit",
DBUS_TYPE_STRING, &app, DBUS_TYPE_STRING, &reason, DBUS_TYPE_INVALID,
DBUS_TYPE_UINT32, &screensaver_cookie, DBUS_TYPE_INVALID)) {
return SDL_FALSE;
334
335
336
337
338
339
return (screensaver_cookie != 0) ? SDL_TRUE : SDL_FALSE;
} else {
if (!SDL_DBus_CallVoidMethod(node, path, interface, "UnInhibit", DBUS_TYPE_UINT32, &screensaver_cookie, DBUS_TYPE_INVALID)) {
return SDL_FALSE;
}
screensaver_cookie = 0;
342
343
return SDL_TRUE;
346
347
/* vi: set ts=4 sw=4 expandtab: */