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(libext2fs.info)Directory block functions

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Directory block functions
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 - Function: errcode_t ext2fs_read_dir_block (ext2_filsys FS, blk_t
          BLOCK, void *BUF)
     This function reads a directory block, performing any necessary
     byte swapping if necessary.

 - Function: errcode_t ext2fs_write_dir_block (ext2_filsys FS, blk_t
          BLOCK, void *BUF)
     This function writes a directory block, performing any necessary
     byte swapping if necessary.

 - Function: errcode_t ext2fs_new_dir_block (ext2_filsys FS,
     ext2_ino_t DIR_INO, ext2_ino_t PARENT_INO, char **BLOCK)

     This function creates a new directory block in BLOCK.  If DIR_INO
     is non-zero, then DIR_INFO and PARENT_INO is used to initialize
     directory entries for `.' and `..', respectively.