#include <stdio.h>
#include <unistd.h>
main(int argc, char **argv){
	int mypipe[2],pid;
	if(argc < 3){
		printf("usage: %s cmd1 cmd2\n",argv[0]);
		exit(0);
		}
	pipe(mypipe);
	pid=fork();
	if(pid<0){
		printf("we encounted a fork error\n");
		exit(1);
		}
	if(pid == 0){ /* we are the child */
		close(mypipe[0]); /* close the read end of the pipe */
		close(1);	/* closes stdout */
		dup(mypipe[1]);	/* duplicate write end of pipe on stdout */
		close(mypipe[1]); /* close write end of pipe */
		system(argv[1]);
		}
	if(pid > 0){ /* we are the parent */
		close(mypipe[1]); /* close write end of pipe */
		close(0);	/* close stdin */
		dup(mypipe[0]);	/* duplicate read end of pipe in stdin */
		close(mypipe[0]); /* close read end of pipe */
		system(argv[2]);
		}
	}