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

#define BASEPORT 0x378 /* lp1 */

int main(int argc, char * argv[])
{
  int value = 0;
  if(!strcmp(argv[1],"on"))
    value = 4;
  else if(!strcmp(argv[1],"off"))
    value = 0;
  else{
    printf("\nUSAGE: magicPlug [on|off]\n\n");
    exit(0);
  }
  /* Get access to the ports */
  if (ioperm(BASEPORT, 3, 1)) {perror("ioperm"); exit(1);}
  
  /* Set the data signals (D0-7) of the port to the given value (argv[1]) */
  outb(value, BASEPORT);
  
  /* We don't need the ports anymore */
  if (ioperm(BASEPORT, 3, 0)) {perror("ioperm"); exit(1);}

  exit(0);
}