/* Sample of creating a pipe and using it within
   a single process.

   This example creates a pipe, then writes until write returns an
   error (trying to find out how much a pipe can hold)

*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

/* here is the actual data sent to the pipe: */
#define BUFSIZE 1024

int main(int argc, char **argv) {
  int fds[2];
  char data[BUFSIZE];
  int n;
  unsigned int tot;
  /* attempt to create a pipe  */
  if (pipe(fds)<0) {
	perror("Fatal Error");
	exit(1);
  }


  while (write(fds[1],data,BUFSIZE)>0) {
	tot += BUFSIZE;
	if (tot & 0x0FFFF) {
	  printf("%u\n",tot);
	}
  }
  printf("Final tally %u\n",tot);

  return(0);
}