/* 
 * This program illustrates the idea that all Linux/Unix devices
 * can be treated as a file.
 */
#include <stdio.h>
int main(int argc, char* argv[]) {

  FILE *wp;    /* file pointers for read/write */
  FILE *rp;

  char buf[80];  /* string buffer of random length */
  int  count;    /* some random integer value */

  count = 10;
  wp = fopen("/dev/pts/0","w");
  rp = fopen("/dev/pts/1","r+");

  if (rp == NULL || wp == NULL)
     fprintf(stderr, "error\n");
  fprintf(rp,"hello world, type something\n");
  fscanf(rp,"%s",buf);
  fprintf(rp,"%s\n",buf);
  printf("%s\n",buf);

  fflush(rp);

  fprintf(rp,"%d", count);
  fscanf(rp,"%d",&count);
  fprintf(rp,"%d\n",count);
  printf("%d\n",count*2);

  printf("wait...\n");
  scanf("%d", &count);

  fprintf(wp, "wrote to pts0 %d\n", count);
  
  return 0;
}