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#include <glib.h>
#include <dbus/dbus.h>
#include <dbus/dbus-glib.h>
#include <dbus/dbus-glib-lowlevel.h>
#include <time.h>
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
static const char *v_STRING;
static int send_ping(void *bus_ptr)
{
DBusConnection *bus = bus_ptr;
DBusMessage *message;
struct timespec tx_time;
struct timespec done_time;
message = dbus_message_new_signal("/de/linutronix/Ping",
"de.linutronix.Ping", "Ping");
/* Append the string to the signal */
dbus_message_append_args(message,
DBUS_TYPE_STRING, &v_STRING,
DBUS_TYPE_INVALID);
clock_gettime(CLOCK_MONOTONIC, &tx_time);
/* Send the signal */
dbus_connection_send(bus, message, NULL);
clock_gettime(CLOCK_MONOTONIC, &done_time);
g_print("%ld.%06ld: ping sent: %d bytes (%ldus)\n",
tx_time.tv_sec, tx_time.tv_nsec / 1000, strlen(v_STRING) + 1,
((done_time.tv_sec - tx_time.tv_sec) * 1000000) +
(done_time.tv_nsec / 1000) - (tx_time.tv_nsec / 1000));
/* Free the signal now we have finished with it */
dbus_message_unref(message);
/* Return TRUE to tell the event loop we want to be called again */
return TRUE;
}
int main(int argc, char *argv[])
{
GMainLoop *loop;
DBusConnection *bus;
DBusError error;
if (argc > 1) {
int val = atoi(argv[1]);
char *s;
if (val < 1)
val = 1;
s = malloc(val);
memset(s, '#', val);
s[val - 1] = 0;
v_STRING = s;
} else {
v_STRING = "default message";
}
/* Create a new event loop to run in */
loop = g_main_loop_new(NULL, FALSE);
/* Get a connection to the session bus */
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;
}
/* Set up this connection to work in a GLib event loop */
dbus_connection_setup_with_g_main(bus, NULL);
/* Every second call send_ping() with the bus as an argument */
g_timeout_add(1000, send_ping, bus);
/* Start the event loop */
g_main_loop_run(loop);
return 0;
}
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