#include <unistd.h>
#include <stdio.h>

int main()
{
  printf("Okay, we are going to read from a copy of stdin (fd 0).\n");
  printf("First, we make the copy with dup():\n");

  int new_fd = dup(0);

  printf("Okay, the new file descriptor is %d...\n",new_fd);

  printf("Let's try reading from it...\n\n");

  char buffer[4096];
  int bytes = read(new_fd,buffer,4095);
  
  if(bytes > 0)
    {
      buffer[bytes] = (char )0;
      printf("Okay, we read these bytes: '%s'\n",buffer);
      printf("All finished!\n");
    }
  else
    {
      printf("(Didn't read)...\n");
    }
}