#ifndef __i386__
#  error "This program can't compile or run on non-intel computers"
#else

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <asm/io.h>

// Line Printer parallel port base address
#define lp_base 0x378

int main(int argc, char **argv)
{
    unsigned int value;

    setuid(0); /* if we're setuid, do it really */

    if(argc != 2) {
	fprintf(stderr,"writeleds error. Usage : writeleds data\n");
	exit(-1);
    }
    sscanf(argv[1],"%x",&value);
    value &= 0xff;

    if (ioperm(lp_base, 1, 1)) {
	perror("ioperm()"); 
	exit(-1);
    }
// Writes value to pin #2 to #9
    outb(value, lp_base);
    printf("Leds written = 0x%02x\n", value);

    return(0);
}

#endif /* __i386__ */