https://github.com/dbrgn/superblock

A script written in Python to analyze the superblock of a ext2 formatted file.
https://github.com/dbrgn/superblock

Last synced: 10 months ago
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A script written in Python to analyze the superblock of a ext2 formatted file.

• Host: GitHub
• URL: https://github.com/dbrgn/superblock
• Owner: dbrgn
• License: mit
• Created: 2012-12-21T00:12:49.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2013-01-31T00:08:56.000Z (over 13 years ago)
• Last Synced: 2025-01-12T10:42:24.979Z (over 1 year ago)
• Language: Python
• Size: 168 KB
• Stars: 6
• Watchers: 3
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.rst
  • License: LICENSE

Awesome Lists containing this project

README

          
##########

superblock

##########

A script written in Python 2 to analyze the superblock of an ext2/ext3 formatted

file.

Such a file can be created as follows::

    $ dd count=4096 if=/dev/zero of=filesystem.ext3

    $ sudo mkfs.ext3 filesystem.ext3

It can be mounted with ::

    $ sudo mount -t ext3 -o loop filesystem.ext3 /mnt/mountpoint

Install

=======

You can either download ``superblock.py`` file and use it directly, or install

the ``superblock`` command via pip::

    $ sudo pip install superblock

Usage

=====

::

    $ superblock [dump|analyze] 

License

=======

`MIT License `_, see LICENSE file.

Examples

========

Dump

----

::

    Printing superblock (bytes 1024-1535) of file fs.ext2.

                         HEX                       ASCII      

     1:  40000000 00020000 19000000 e2010000  @...............

     2:  32000000 01000000 00000000 00000000  2...............

     3:  00200000 00200000 40000000 82bad550  . ... ..@......P

     4:  c4bcd550 0200ffff 53ef0100 01000000  ...P....S.......

     5:  968bd550 00000000 00000000 01000000  ...P............

     6:  00000000 0b000000 80000000 38000000  ............8...

     7:  02000000 01000000 dc0cb51b 2ab54967  ............*.Ig

     8:  8e602492 87974d10 65787065 72696d5f  .`$...M.experim_

     9:  65787432 00000000 2f686f6d 652f6461  ext2..../home/da

    10:  6e696c6f 2f50726f 6a656374 732f7375  nilo/Projects/su

    11:  70657262 6c6f636b 2f6d6e74 00000000  perblock/mnt....

    12:  00000000 00000000 00000000 00000000  ................

    13:  00000000 00000000 00000000 00000100  ................

    14:  00000000 00000000 00000000 00000000  ................

    15:  00000000 00000000 00000000 ff27f89c  .............'..

    16:  b5cb41d1 987de848 6b3e81ba 01000000  ..A..}.Hk>......

    17:  0c000000 00000000 968bd550 00000000  ...........P....

    18:  00000000 00000000 00000000 00000000  ................

    19:  00000000 00000000 00000000 00000000  ................

    20:  00000000 00000000 00000000 00000000  ................

    21:  00000000 00000000 00000000 00000000  ................

    22:  00000000 00000000 00000000 00000000  ................

    23:  01000000 00000000 00000000 00000000  ................

    24:  00000000 00000000 00000000 00000000  ................

    25:  00000000 00000000 00000000 00000000  ................

    26:  00000000 00000000 00000000 00000000  ................

    27:  00000000 00000000 00000000 00000000  ................

    28:  00000000 00000000 00000000 00000000  ................

    29:  00000000 00000000 00000000 00000000  ................

    30:  00000000 00000000 00000000 00000000  ................

    31:  00000000 00000000 00000000 00000000  ................

    32:  00000000 00000000 00000000 00000000  ................

Analyze

-------

::

    Analyzing superblock (bytes 1024-1535) of file fs.ext2.

    Total number of inodes: 64

    Filesystem size in blocks: 512

    Number of reserved blocks: 25

    Free blocks counter: 482

    Free inodes counter: 50

    Number of first block: 1

    Block size: 0 (1024 Byte)

    Fragment size: 0

    Number blocks per group: 8192

    Number fragments per group: 8192

    Number inodes per group: 64

    Number of block groups: 1

    Time of last mount: 1356184194 (2012-12-22 14:49:54)

    Time of last write: 1356184772 (2012-12-22 14:59:32)

    Mount operations counter: 2

    Number of mount operations before check: 65535

    Magic signature: 0XEF53

    Status flag: 1

    Behavior when detecting errors: 1

    Minor revision level: 0

    Time of last check: 1356172182 (2012-12-22 11:29:42)

    Time between checks: 0

    OS Filesystem created: 0

    Revision level: 1

    Default user ID for reserved blocks: 0

    Default group ID for reserved blocks: 0

    Number first nonreserved inode: 11

    Size of on-disk inode structure: 128

    Block group number of this superblock: 0

    Compatible features bitmap: 111000 (ext_attr resize_ino dir_index)

    Incompatible features bitmap: 00010 (filetype)

    Read-only features bitmap: 001 (sparse_super)

    128-bit filesystem identifier: dc0cb51b-2ab5-4967-8e60-249287974d10

    Volume name: experim_ext2

    Path of last mount point: /home/danilo/Projects/superblock/mnt

    Compression Algorithm: 00000 (none)

    Number of blocks to preallocate: 0

    Number of blocks to preallocate for directories: 0

    Journal UUID: 00000000-0000-0000-0000-000000000000

    Journal inode number: 0

    Journal device number: 0

    Journal last orphan: 0

    Hash seed: 2633508863 3510750133 1223196056 3129032299

    Hash version: 1

    Default mount options: 01100 (xattr_user acl)

    First meta block group ID: 0

Resources

=========

- `The Second Extended File System `__

- `/usr/include/ext2fs/ext2_fs.h`