if (Var_Value(arg, VAR_CMD) != NULL)
if (Var_Value(arg, NULL) != NULL)
CondDoDefined(argLen, arg)    size_t  argLen;    char    *arg;{    char    savec = arg[argLen];    Boolean result;    arg[argLen] = '\0';    if (Var_Value(arg, VAR_CMD) != NULL)	result = TRUE;    else	result = FALSE;    arg[argLen] = savec;    return (result);}