lfs_fuse.py 文件源码

def mknod(self, path, mode, dev):
        # File can't exist already or upper levels of VFS reject the call.
        if mode & stat.S_IFBLK != stat.S_IFBLK:
            raise TmfsOSError(errno.ENOTBLK)
        rsp = self.librarian(self.lcp('get_shelf', path=path),
                             errorOK=True)
        if 'errmsg' not in rsp:
            raise TmfsOSError(errno.EEXIST)
        nbooks = dev & 0xFF     # minor
        if not nbooks:
            raise TmfsOSError(errno.EINVAL)
        mode &= 0o777
        fh = self.create(path, 0, supermode=stat.S_IFBLK + mode)  # w/shadow
        self.setxattr(path, 'user.LFS.AllocationPolicy',
                      'LocalNode'.encode(), 0)
        self.truncate(path, nbooks * self.bsize, fh)
        self.release(path, fh)
        # mknod(1m) immediately does a stat looking for S_IFBLK.
        # Not sure what else to do about shadow mode...
        return 0