Function parseopts 

pub unsafe extern "C" fn parseopts(
    nam: *mut c_char,
    argvp: *mut *mut *mut c_char,
    new_opts: *mut c_char,
    cmdp: *mut *mut c_char,
    optlist: LinkList,
    flags: c_int,
    needkeymap: *mut c_int,
) -> c_int