/*
* Test switching the 22kHz tone signal on and off on a SAT frontend.
* (Note: DiSEqC equipment ignores this after it has once seen a diseqc
* sequence; reload the driver or unplug/replug the SAT cable to reset.)
*
* usage: FRONTEND=/dev/dvb/adapterX/frontendX set22k {on|off}
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/dvb/frontend.h>
int main (int argc, char **argv)
{
char *fedev = "/dev/dvb/adapter0/frontend0";
int fd, r;
if (argc != 2 || (strcmp(argv[1], "on") && strcmp(argv[1], "off"))) {
fprintf (stderr, "usage: %s <on|off>\n", argv[0]);
return 1;
}
if (getenv("FRONTEND"))
fedev = getenv("FRONTEND");
printf("set22k: using '%s'\n", fedev);
if ((fd = open (fedev, O_RDWR)) < 0) {
perror ("open");
return 1;
}
if (strcmp(argv[1], "on") == 0)
r = ioctl (fd, FE_SET_TONE, SEC_TONE_ON);
else
r = ioctl (fd, FE_SET_TONE, SEC_TONE_OFF);
if (r == -1)
perror("ioctl FE_SET_TONE");
close (fd);
return 0;
}