/* * substitute for BSD/SVR3 rename() system call, from * Janet Walz, walz@mimsy.umd.edu & Rich Salz, rsalz@pineapple.bbn.com */int rename(oldname,newname)char *oldname,*newname;{	(void)unlink(newname);	if(link(oldname,newname))		return(-1);	return(unlink(oldname));}