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

main()
{
	const int RESPONSE_FD = 63;
	int pfd[2], status, size;
	char buffer[100];

	status = pipe(pfd);
	if(status == -1)
	{
		printf("Could not open pipe\n");
		exit(1);
	}
	else
	{
		printf("The filedescriptors are: %d %d\n", pfd[0], pfd[1]);
	}

	status = fork();
	if(status == 0)
	{
		printf("This is the child\n");
		status = dup2(pfd[0], RESPONSE_FD);
		if(status == -1)
		{
			printf("dup2 failed\n");
			exit(1);
		}
		close(pfd[1]);
		close(pfd[0]);
		while(read(STDIN_FILENO, buffer, sizeof(buffer))>0)
		{
			printf("%s", buffer);
		}
	}
	else
	{
		printf("This is the parent\n");
		system("my_prog.pl");
	}
}