#include	<stdio.h>
#include	<stdlib.h>
#include	<string.h>
#include    <unistd.h>

#define	MAXARGS		20				
#define	ARGLEN		100				

int execute( char *arglist[] )
{
	execvp(arglist[0], arglist);		
	perror("execvp failed");
	exit(1);
}

char * makestring( char *buf )
{
	char	*cp;

	buf[strlen(buf)-1] = '\0';		
	cp = malloc( strlen(buf)+1 );		
	if ( cp == NULL ){			
		fprintf(stderr,"no memory\n");
		exit(1);
	}
	strcpy(cp, buf);		
	return cp;			
}

int main()
{
	char	*arglist[MAXARGS+1];		
	int		numargs;			
	char	argbuf[ARGLEN];			

	numargs = 0;
	while ( numargs < MAXARGS )
	{					
		printf("Arg[%d]? ", numargs);
		if ( fgets(argbuf, ARGLEN, stdin) && *argbuf != '\n' )
			arglist[numargs++] = makestring(argbuf);
		else
		{
			if ( numargs > 0 ){		
				arglist[numargs]=NULL;	
				execute( arglist );	
				numargs = 0;		
			}
		}
	}
	return 0;
}