1
2
3
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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
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
|
/*
* Copyright © 2010 Red Hat, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2 of the licence or (at
* your option) any later version.
*
* See the included COPYING file for more information.
*
* Author: David Zeuthen <davidz@redhat.com>
*/
#include <gdbus/gdbus.h>
static gchar *opt_name = NULL;
static gboolean opt_system_bus = FALSE;
static gboolean opt_auto_start = FALSE;
static GOptionEntry opt_entries[] =
{
{ "name", 'n', 0, G_OPTION_ARG_STRING, &opt_name, "Name to watch", NULL },
{ "system-bus", 's', 0, G_OPTION_ARG_NONE, &opt_system_bus, "Use the system-bus instead of the session-bus", NULL },
{ "auto-start", 'a', 0, G_OPTION_ARG_NONE, &opt_auto_start, "Instruct the bus to launch an owner for the name", NULL},
{ NULL}
};
static void
on_name_appeared (GDBusConnection *connection,
const gchar *name,
const gchar *name_owner,
gpointer user_data)
{
g_print ("Name %s on %s is owned by %s\n",
name,
opt_system_bus ? "the system bus" : "the session bus",
name_owner);
}
static void
on_name_vanished (GDBusConnection *connection,
const gchar *name,
gpointer user_data)
{
g_print ("Name %s does not exist on %s\n",
name,
opt_system_bus ? "the system bus" : "the session bus");
}
int
main (int argc, char *argv[])
{
guint watcher_id;
GMainLoop *loop;
GOptionContext *opt_context;
GError *error;
GBusNameWatcherFlags flags;
g_type_init ();
error = NULL;
opt_context = g_option_context_new ("g_bus_watch_name() example");
g_option_context_set_summary (opt_context,
"Example: to watch the power manager on the session bus, use:\n"
"\n"
" ./example-watch-name -n org.gnome.PowerManager");
g_option_context_add_main_entries (opt_context, opt_entries, NULL);
if (!g_option_context_parse (opt_context, &argc, &argv, &error))
{
g_printerr ("Error parsing options: %s", error->message);
goto out;
}
if (opt_name == NULL)
{
g_printerr ("Incorrect usage, try --help.\n");
goto out;
}
flags = G_BUS_NAME_WATCHER_FLAGS_NONE;
if (opt_auto_start)
flags |= G_BUS_NAME_WATCHER_FLAGS_AUTO_START;
watcher_id = g_bus_watch_name (opt_system_bus ? G_BUS_TYPE_SYSTEM : G_BUS_TYPE_SESSION,
opt_name,
flags,
on_name_appeared,
on_name_vanished,
NULL,
NULL);
loop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (loop);
g_bus_unwatch_name (watcher_id);
out:
g_option_context_free (opt_context);
g_free (opt_name);
return 0;
}
|
