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#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/ioctl.h>
int main(int argc, char ** argv) {
int fd = open("/dev/fb0", O_WRONLY|O_NONBLOCK );
int on;
int res = 0;
if (argc != 2) {
printf("You must specify on or off\n");
return 0;
}
on = !strncmp(argv[1], "on", (strlen(argv[1]) > 1 ? 2 : 1));
printf((on ? "on\n" : "off\n"));
if ( fd )
{
int ioctlnum = 0x4611;
int vesaMode = on ? 0 : 3;
res = ioctl ( fd, ioctlnum, vesaMode );
printf("%i\n", res);
close ( fd );
}
else
{
printf("failed\n");
}
return res;
}
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