#include <stdio.h>
#include <unistd.h>
#include <sys/select.h>
void write_pipe1(int fd,int code){
   fd_set wrfds;
   struct timeval tv;

           /* Watch stdin (fd 0) to see when it has input. */
       FD_ZERO(&wrfds);
       FD_SET(fd, &wrfds);
       tv.tv_sec = 0;
       tv.tv_usec = 0;

       //retval = select(keyb_fifo_put+1, &rfds, NULL, NULL, &tv);
       select(fd+1, NULL, &wrfds, NULL, &tv);
       if( FD_ISSET(fd, &wrfds) ){
             write(fd, &code,4);
             printf("+");
       } else {
             printf("-");
    
       }
}

void write_pipe2(int fd,int code){
       if(write(fd, &code,4)==4){
             printf("+");
       } else {
             printf("-");

       }
}

int main(){
  int temp[2];
  int i;
  
  if(pipe(temp)!=0) printf("Error");
  
  for(i=0;i<20;i++){
    write_pipe1(temp[1],0x20);
  }
 printf("\n");

  read(temp[0],&i,4);
  for(i=0;i<20;i++){
    write_pipe1(temp[1],0x20);
  }
 printf("\n");

  read(temp[0],&i,4);
  for(i=0;i<2048;i++){
    write_pipe2(temp[1],0x20);
    if(i%60==59) printf("\n");

  }
 printf("\n");
   
}