writeShort(0) // additional

      val nameBuf = Buffer()
      val labels = host.split('.').dropLastWhile { it.isEmpty() }
      for (label in labels) {
        val utf8ByteCount = label.utf8Size()
        require(utf8ByteCount == label.length.toLong()) { "non-ascii hostname: $host" }
        nameBuf.writeByte(utf8ByteCount.toInt())
        nameBuf.writeUtf8(label)
      }
      nameBuf.writeByte(0) // end

}

func BpxOpen(name string, options *BpxFilestatus, mode *BpxMode) (rv int32, rc int32, rn int32) {
	if len(name) < 1024 {
		var namebuf [1024]byte
		sz := int32(copy(namebuf[:], name))
		A2e(namebuf[:sz])
		var parms [7]unsafe.Pointer
		parms[0] = unsafe.Pointer(&sz)
		parms[1] = unsafe.Pointer(&namebuf[0])
		parms[2] = unsafe.Pointer(options)
		parms[3] = unsafe.Pointer(mode)
		parms[4] = unsafe.Pointer(&rv)

	nameBuf := (*[unsafe.Sizeof(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
	const nameBufLen = uint16(len(nameBuf))
	limit := dirent.Reclen - fixedHdr
	if limit > nameBufLen {
		limit = nameBufLen
	}
	// Avoid bugs in long file names
	// https://github.com/golang/tools/commit/5f9a5413737ba4b4f692214aebee582b47c8be74
	nameLen := bytes.IndexByte(nameBuf[:limit], 0)
	if nameLen < 0 {

	SYS_GETGID                   = 47  // { gid_t getgid(void); }
	SYS_GETLOGIN                 = 49  // { int getlogin(char *namebuf, u_int \
	SYS_SETLOGIN                 = 50  // { int setlogin(char *namebuf); }
	SYS_ACCT                     = 51  // { int acct(char *path); }
	SYS_SIGALTSTACK              = 53  // { int sigaltstack(stack_t *ss, \

	SYS_GETGID                   = 47  // { gid_t getgid(void); }
	SYS_GETLOGIN                 = 49  // { int getlogin(char *namebuf, u_int \
	SYS_SETLOGIN                 = 50  // { int setlogin(char *namebuf); }
	SYS_ACCT                     = 51  // { int acct(char *path); }
	SYS_SIGALTSTACK              = 53  // { int sigaltstack(stack_t *ss, \

	SYS_GETGID                   = 47  // { gid_t getgid(void); }
	SYS_GETLOGIN                 = 49  // { int getlogin(char *namebuf, u_int \
	SYS_SETLOGIN                 = 50  // { int setlogin(char *namebuf); }
	SYS_ACCT                     = 51  // { int acct(char *path); }
	SYS_SIGALTSTACK              = 53  // { int sigaltstack(stack_t *ss, \

		// files and directories.
		typ = unexpectedFileMode
	}

	nameBuf := (*[unsafe.Sizeof(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
	nameLen, err := direntNamlen(dirent)
	if err != nil {
		return consumed, nil, typ, err
	}

	return consumed, nameBuf[:nameLen], typ, nil
}

// readDirFn applies the fn() function on each entries at dirPath, doesn't recurse into

	SYS_GETGID         = 47  // { gid_t sys_getgid(void); }
	SYS_SIGPROCMASK    = 48  // { int sys_sigprocmask(int how, sigset_t mask); }
	SYS_SETLOGIN       = 50  // { int sys_setlogin(const char *namebuf); }
	SYS_ACCT           = 51  // { int sys_acct(const char *path); }
	SYS_SIGPENDING     = 52  // { int sys_sigpending(void); }
	SYS_FSTAT          = 53  // { int sys_fstat(int fd, struct stat *sb); }

	SYS_GETGID         = 47  // { gid_t sys_getgid(void); }
	SYS_SIGPROCMASK    = 48  // { int sys_sigprocmask(int how, sigset_t mask); }
	SYS_SETLOGIN       = 50  // { int sys_setlogin(const char *namebuf); }
	SYS_ACCT           = 51  // { int sys_acct(const char *path); }
	SYS_SIGPENDING     = 52  // { int sys_sigpending(void); }
	SYS_FSTAT          = 53  // { int sys_fstat(int fd, struct stat *sb); }

	SYS_GETGID                   = 47  // { gid_t getgid(void); }
	SYS_GETLOGIN                 = 49  // { int getlogin(char *namebuf, u_int namelen); }
	SYS_SETLOGIN                 = 50  // { int setlogin(char *namebuf); }
	SYS_ACCT                     = 51  // { int acct(char *path); }
	SYS_SIGALTSTACK              = 53  // { int sigaltstack(stack_t *ss, stack_t *oss); }