#include <strings.h>

main(ac,av)
int ac;
char **av;
{
 char *av0;
 char *malloc();

 if (av[1][0] == '\0') exit(1);
 av0 = malloc(strlen(av[1])+1);
 strcpy(av0,av[1]);
 av[1][0] = '-';
 execv(av0,av+1);
 perror(av0);
 exit(1);
}