#include	<unistd.h>
#include	<stdio.h>
#include	<stdlib.h>
main()
{	int result;
	char prog[100];

	printf( "\nWelcome to the Dshell...\n" );
	printf( "Running as real UID %d and effective UID %d\n\n",getuid(),geteuid());
	while (1)
	{
		printf("What executable should the child run? ");
		scanf( "%s", &prog);
		result = fork();
		if ( result == 0 ) 
		  { execl(prog,prog,NULL);
		    exit(0); }
		else
		  { wait(NULL);
	 	    printf("\n...done waiting. Welcome back!\n----------\n\n"); }
	}
}