1 #include <gio/gio.h>
2
3 static gchar *opt_name = NULL;
4 static gboolean opt_system_bus = FALSE;
5 static gboolean opt_auto_start = FALSE;
6
7 static GOptionEntry opt_entries[] =
8 {
9 { "name", 'n', 0, G_OPTION_ARG_STRING, &opt_name, "Name to watch", NULL },
10 { "system-bus", 's', 0, G_OPTION_ARG_NONE, &opt_system_bus, "Use the system-bus instead of the session-bus", NULL },
11 { "auto-start", 'a', 0, G_OPTION_ARG_NONE, &opt_auto_start, "Instruct the bus to launch an owner for the name", NULL},
12 { NULL}
13 };
14
15 static void
on_name_appeared(GDBusConnection * connection,const gchar * name,const gchar * name_owner,gpointer user_data)16 on_name_appeared (GDBusConnection *connection,
17 const gchar *name,
18 const gchar *name_owner,
19 gpointer user_data)
20 {
21 g_print ("Name %s on %s is owned by %s\n",
22 name,
23 opt_system_bus ? "the system bus" : "the session bus",
24 name_owner);
25 }
26
27 static void
on_name_vanished(GDBusConnection * connection,const gchar * name,gpointer user_data)28 on_name_vanished (GDBusConnection *connection,
29 const gchar *name,
30 gpointer user_data)
31 {
32 g_print ("Name %s does not exist on %s\n",
33 name,
34 opt_system_bus ? "the system bus" : "the session bus");
35 }
36
37 int
main(int argc,char * argv[])38 main (int argc, char *argv[])
39 {
40 guint watcher_id;
41 GMainLoop *loop;
42 GOptionContext *opt_context;
43 GError *error;
44 GBusNameWatcherFlags flags;
45
46 error = NULL;
47 opt_context = g_option_context_new ("g_bus_watch_name() example");
48 g_option_context_set_summary (opt_context,
49 "Example: to watch the power manager on the session bus, use:\n"
50 "\n"
51 " ./example-watch-name -n org.gnome.PowerManager");
52 g_option_context_add_main_entries (opt_context, opt_entries, NULL);
53 if (!g_option_context_parse (opt_context, &argc, &argv, &error))
54 {
55 g_printerr ("Error parsing options: %s", error->message);
56 goto out;
57 }
58 if (opt_name == NULL)
59 {
60 g_printerr ("Incorrect usage, try --help.\n");
61 goto out;
62 }
63
64 flags = G_BUS_NAME_WATCHER_FLAGS_NONE;
65 if (opt_auto_start)
66 flags |= G_BUS_NAME_WATCHER_FLAGS_AUTO_START;
67
68 watcher_id = g_bus_watch_name (opt_system_bus ? G_BUS_TYPE_SYSTEM : G_BUS_TYPE_SESSION,
69 opt_name,
70 flags,
71 on_name_appeared,
72 on_name_vanished,
73 NULL,
74 NULL);
75
76 loop = g_main_loop_new (NULL, FALSE);
77 g_main_loop_run (loop);
78
79 g_bus_unwatch_name (watcher_id);
80
81 out:
82 g_option_context_free (opt_context);
83 g_free (opt_name);
84
85 return 0;
86 }
87