lfs_fuse.py 文件源码

def setxattr(self, path, xattr, valbytes, flags, position=0):
        # flags from linux/xattr.h: XATTR_CREATE = 1, XATTR_REPLACE = 2
        if flags or position:
            raise TmfsOSError(errno.ENOSYS)     # haven't actually seen it yet

        # 'Extend' user.xxxx syntax and screen for it here
        elems = xattr.split('.')
        if elems[0] != 'user' or len(elems) < 2:
            raise TmfsOSError(errno.EINVAL)

        # Don't forget the setfattr command, and the shell it runs in, does
        # things to a "numeric" argument.  setfattr processes a leading
        # 0x and does a byte-by-byte conversion, yielding a byte array.
        # It needs pairs of digits and can be of arbitrary length.  Any
        # other argument ends up here as a pure string (well, byte array).
        try:
            value = valbytes.decode()
        except ValueError as e:
            # http://stackoverflow.com/questions/606191/convert-bytes-to-a-python-string
            value = valbytes.decode('cp437')

        rsp = self.librarian(
                self.lcp('set_xattr', path=path,
                         xattr=xattr, value=value))
        if rsp is not None:  # unexpected
            raise TmfsOSError(errno.ENOTTY)