#include<stdlib.h>
#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>


int main(){
	printf("Good Morning\n");
	int backup_stdout = dup(1);
	int pipe_ends[2];
	pipe(pipe_ends);
	int read_end = pipe_ends[0];
	int write_end = pipe_ends[1];
	printf("read:  %d\nwrite:  %d\n", read_end, write_end);

	dup2(write_end, 1);
	system("ls");

	char buffer[256];
	size_t readlen = read(read_end, buffer, 256);
	buffer[readlen] = 0;

	dup2(backup_stdout, 1);
	printf("Buffer contains:  %s\n", buffer);

	
	return 0;
}