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(libext2fs.info)Closing and flushing out changes

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Closing and flushing out changes
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 - Function: errcode_t ext2fs_flush (ext2_filsys FS)
     Write any changes to the high-level filesystem data structures in
     the FS filesystem.  The following data structures will be written
     out:

        * The filesystem superblock

        * The filesystem group descriptors

        * The filesystem bitmaps, if read in via `ext2fs_read_bitmaps'.


 - Function: void ext2fs_free (ext2_filsys FS)
     Close the io_manager abstraction for FS and release all memory
     associated with the filesystem handle.

 - Function: errcode_t ext2fs_close (ext2_filsys FS)
     Flush out any changes to the high-level filesystem data structures
     using `ext2fs_flush' if the filesystem is marked dirty; then close
     and free the filesystem using `ext2fs_free'.