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

#define base 0x378           /* /dev/lp0 */

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

	if (argc!=2)
		printf("Enter a number between 0 and 255.\n"), exit(1);

	if (sscanf(argv[1],"%i",&value)!=1)
		printf("Parameter is not a number.\n"), exit(1);

	if ((value<0) || (value>255))
		printf("Enter a number between 0 and 255.\n"), exit(1);

	if (ioperm(base,1,1))
		perror("ioperm");

	printf("Setting base %x to value %d\n", base, value);

	outb((unsigned char)value, base);
}