#include <stdio.h>
main(char * argv[],int argc)
{
  char *name="./pipeclient";
  char a[10];
  int pid,fd[2];
  int i;

  if (pipe(fd) == -1)
  {
     fprintf(stderr," pipe failed \n");
     exit(-1);
  }

  switch (pid = fork())
  {
     case  -1 :  fprintf(stderr," fork failed \n");
                 exit(-2);
     case   0 :  if (close(fd[1]) == -1) /* child process */
                 {
                    fprintf(stderr," close\n");
                    exit(-3);
                 }
                 sprintf(a,"%d",fd[0]);
                 execlp(name,"pread",a,NULL);
                 fprintf(stderr," execlp error \n");
  }
  if (close(fd[0]) == -1)
  {
     fprintf(stderr," close2 \n");
     exit(-4);
  }
  if (write(fd[1],"hello",5) == -1)
  {
     fprintf(stderr," write error \n");
     exit(-5);
  }
  i = 6;
  if (write(fd[1],&i,4) == -1)
  {
     fprintf(stderr," write int error \n");
     exit(-6);
  }
  while (wait((int *)0) != pid) /* wait child to terminate */
    ;
}