partition.py 文件源码

def prepare_empty_partition_btrfs(self, rootfs, oe_builddir):
        """
        Prepare an empty btrfs partition.
        """
        size = self.disk_size
        with open(rootfs, 'w') as sparse:
            os.ftruncate(sparse.fileno(), size * 1024)

        label_str = ""
        if self.label:
            label_str = "-L %s" % self.label

        mkfs_cmd = "sudo mkfs.%s -b %d %s %s" % \
            (self.fstype, self.size * 1024, label_str, rootfs)
        exec_cmd(mkfs_cmd)