/* add string to a menu file */
_menufadd(s, menu, separator)
{
        local mod, app_path;

        if (argc < 3)
        {
                if (argc < 2)
                {
                        if (argc < 1) return();

                        /* defaults to "modules.men" in temp directory */
                        menu = getmiscpath(1, 1) + _modmenname();
                }

                separator = 1;
        }

        /* check if string already in file */
        mstr = strfile(menu);

        if (strlen(strfind(s, mstr)) == 0)
        {
                /* not in file, add string */
                fopen(menu, "a");
                fseek(menu, 0, 2);

                if (separator)
                {
                        fputs("\n", menu);
                }

                fputs(s + "\n", menu);
                fclose(menu);
        }
}