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#include <dbus/dbus.h>
#include <dbus/dbus-glib.h>
#include <dbus/dbus-glib-lowlevel.h>
#include <time.h>
#include <string.h>
static DBusHandlerResult signal_filter(DBusConnection *connection,
DBusMessage *message, void *user_data)
{
/* User data is the event loop we are running in */
GMainLoop *loop = user_data;
/* A signal from the bus saying we are about to be disconnected */
if (dbus_message_is_signal(message, "org.freedesktop.Local",
"Disconnected")) {
/* Tell the main loop to quit */
g_main_loop_quit (loop);
/* We have handled this message, don't pass it on */
return DBUS_HANDLER_RESULT_HANDLED;
} else if (dbus_message_is_signal(message, "de.linutronix.Ping",
"Ping")) {
struct timespec rx_time;
DBusError error;
char *s;
clock_gettime(CLOCK_MONOTONIC, &rx_time);
dbus_error_init(&error);
if (dbus_message_get_args(message, &error, DBUS_TYPE_STRING,
&s, DBUS_TYPE_INVALID)) {
g_print("%ld.%06ld: ping received: %d bytes\n",
rx_time.tv_sec, rx_time.tv_nsec / 1000,
strlen(s) + 1);
} else {
g_print("%ld.%06ld: ping received, but error"
" getting message: %s\n",
rx_time.tv_sec, rx_time.tv_nsec / 1000,
error.message);
dbus_error_free(&error);
}
return DBUS_HANDLER_RESULT_HANDLED;
}
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
int main(int argc, char *argv[])
{
GMainLoop *loop;
DBusConnection *bus;
DBusError error;
loop = g_main_loop_new(NULL, FALSE);
dbus_error_init(&error);
bus = dbus_bus_get(DBUS_BUS_SESSION, &error);
if (!bus) {
g_warning("Failed to connect to the D-BUS daemon: %s",
error.message);
dbus_error_free (&error);
return 1;
}
dbus_connection_setup_with_g_main (bus, NULL);
/* listening to messages from all objects as no path is specified */
dbus_bus_add_match(bus,
"type='signal',interface='de.linutronix.Ping'",
&error);
dbus_connection_add_filter(bus, signal_filter, loop, NULL);
g_main_loop_run (loop);
return 0;
}
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