How to copy each of the files into two separate processes. For each copy, we will have the parent process which will act as reader and the child process which will act as writer. The two processes will need to communicate through single pipes.

For example, for the first exchanges between processes, the reader sends the file size (size_t) to the writer.

I have try something like this.

 #include  #include  #include  main(){ int fd[2]; pid_t childpid; pipe(fd); if(childpid == 0){ read(file, ...) close(fd[0]); } else { write (file, ...) close(fd[1]); } }