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


int main(int argc, char* argv[]){
	int pid;
	
	/*Puffer leeren*/
	fflush(NULL);
	
	/*child erzeugen*/
	pid=fork();
	if(pid==0){
		/*Eingabeumlenkung*/
		close(0);
		open("exec2.c", O_RDONLY, 0);
		/*Nach Hallo ... suchen*/
		execlp("grep", "grep", "-i", "hallo", (char*)NULL);	
		exit(0);
	}	
	
	/*parent wartet ...*/
	else wait(NULL);
	
	return 0;
}