ENOTRECOVERABLE = Errno(0x3b)
	ENOTSOCK        = Errno(0x5f)
	ENOTSUP         = Errno(0x30)
	ENOTTY          = Errno(0x19)
	ENOTUNIQ        = Errno(0x50)
	ENXIO           = Errno(0x6)
	EOPNOTSUPP      = Errno(0x7a)
	EOVERFLOW       = Errno(0x4f)
	EOWNERDEAD      = Errno(0x3a)
	EPERM           = Errno(0x1)
	EPFNOSUPPORT    = Errno(0x7b)
	EPIPE           = Errno(0x20)
	EPROTO          = Errno(0x47)

		if err == ENOSYS {
			// fchmodat2 isn't available. If the flags are known to be valid,
			// return EOPNOTSUPP to indicate that fchmodat doesn't support them.
			if flags&^(AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) != 0 {
				return EINVAL
			} else if flags&(AT_SYMLINK_NOFOLLOW|AT_EMPTY_PATH) != 0 {
				return EOPNOTSUPP
			}
		}
		return err
	}
	return fchmodat(dirfd, path, mode)
}

			e == ERROR_PATH_NOT_FOUND ||
			e == ENOENT
	case errorspkg.ErrUnsupported:
		return e == _ERROR_NOT_SUPPORTED ||
			e == _ERROR_CALL_NOT_IMPLEMENTED ||
			e == ENOSYS ||
			e == ENOTSUP ||
			e == EOPNOTSUPP ||
			e == EWINDOWS
	}
	return false
}

func (e Errno) Temporary() bool {
	return e == EINTR || e == EMFILE || e.Timeout()
}

func (e Errno) Timeout() bool {