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#include <stdio.h>
#include <unistd.h>
#include <glib.h>
#include <dbus/dbus-glib.h>
#include <dbus/dbus-glib-lowlevel.h>
static GMainLoop *main_loop;
static DBusConnection *bus;
static gdouble cmd_tune = 0.0;
static gboolean cmd_next = FALSE;
static gboolean cmd_prev = FALSE;
static GOptionEntry entries[] = {
{ "tune", 't', 0, G_OPTION_ARG_DOUBLE, &cmd_tune, "Tune to a specific frequency", "MHz" },
{ "next", 'n', 0, G_OPTION_ARG_NONE, &cmd_next, "Forward scan for a signal", NULL },
{ "prev", 'p', 0, G_OPTION_ARG_NONE, &cmd_prev, "Backward scan for a signal", NULL },
{ NULL }
};
#define BUS_NAME "com.javispedro.fmrxd"
#define BUS_PATH "/com/javispedro/fmrxd"
#define BUS_INTERFACE BUS_NAME
static void tune(double f)
{
DBusError err;
DBusMessage *reply;
DBusMessage *msg = dbus_message_new_method_call(BUS_NAME, BUS_PATH,
BUS_INTERFACE, "Tune");
g_assert(msg != NULL);
dbus_error_init(&err);
dbus_message_append_args(msg, DBUS_TYPE_DOUBLE, &f, DBUS_TYPE_INVALID);
reply = dbus_connection_send_with_reply_and_block(bus, msg, -1, &err);
dbus_message_unref(msg);
if (!reply) {
g_assert(dbus_error_is_set(&err));
g_printerr("Tune error: %s", err.message);
dbus_error_free(&err);
return;
}
dbus_message_unref(reply);
}
static void next()
{
DBusError err;
DBusMessage *reply;
DBusMessage *msg = dbus_message_new_method_call(BUS_NAME, BUS_PATH,
BUS_INTERFACE, "SearchForward");
g_assert(msg != NULL);
dbus_error_init(&err);
reply = dbus_connection_send_with_reply_and_block(bus, msg, -1, &err);
dbus_message_unref(msg);
if (!reply) {
g_assert(dbus_error_is_set(&err));
g_printerr("Tune error: %s", err.message);
dbus_error_free(&err);
return;
}
dbus_message_unref(reply);
}
static void prev()
{
DBusError err;
DBusMessage *reply;
DBusMessage *msg = dbus_message_new_method_call(BUS_NAME, BUS_PATH,
BUS_INTERFACE, "SearchBackward");
g_assert(msg != NULL);
dbus_error_init(&err);
reply = dbus_connection_send_with_reply_and_block(bus, msg, -1, &err);
dbus_message_unref(msg);
if (!reply) {
g_assert(dbus_error_is_set(&err));
g_printerr("Tune error: %s", err.message);
dbus_error_free(&err);
return;
}
dbus_message_unref(reply);
}
static void dbus_init()
{
DBusError err; dbus_error_init(&err);
bus = dbus_bus_get(DBUS_BUS_SYSTEM, &err);
g_assert(bus != NULL);
g_assert(!dbus_error_is_set(&err));
dbus_connection_setup_with_g_main(bus, g_main_loop_get_context(main_loop));
}
int main(int argc, char **argv)
{
GError *error = NULL;
GOptionContext *context = g_option_context_new("- control the fmrxd daemon");
main_loop = g_main_loop_new(NULL, FALSE);
g_option_context_add_main_entries(context, entries, NULL);
if (!g_option_context_parse(context, &argc, &argv, &error)) {
g_printerr("Option parsing failed: %s\n", error->message);
return 1;
}
dbus_init();
if (cmd_tune > 0.0) {
tune(cmd_tune);
}
if (cmd_prev) {
prev();
}
if (cmd_next) {
next();
}
return 0;
}
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