├── README.md
├── build.sh
└── patches
    ├── README.md
    └── patch0.txt


/README.md:
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 1 | About
 2 | =========
 3 | 
 4 | The `sasquatch` project is a set of patches to the standard unsquashfs utility (part of squashfs-tools) that attempts to add support for as many hacked-up vendor-specific SquashFS implementations as possible.
 5 | 
 6 | If the vendor has done something simple like just muck a bit with the header fields, `sasquatch` should sort it out.
 7 | 
 8 | If the vendor has made changes to the underlying LZMA compression options, or to how these options are stored in the compressed data blocks, `sasquatch` will attempt to automatically resolve such customizations via a brute-force method.
 9 | 
10 | Additional advanced command line options have been added for testing/debugging.
11 | 
12 | Very beta.
13 | 
14 | Prerequisites
15 | =============
16 | 
17 | You need a C/C++ compiler, plus the liblzma, liblzo and zlib development libraries:
18 | 
19 | ```bash
20 | $ sudo apt-get install build-essential liblzma-dev liblzo2-dev zlib1g-dev
21 | ```
22 | 
23 | Installation
24 | ============
25 | 
26 | The included `build.sh` script will download squashfs-tools v4.3, patch the source, then build and install `sasquatch`:
27 | 
28 | ```bash
29 | $ ./build.sh
30 | ```
31 | 


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/build.sh:
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 1 | #!/bin/bash
 2 | # Script to download squashfs-tools v4.3, apply the patches, perform a clean build, and install.
 3 | 
 4 | # If not root, perform 'make install' with sudo
 5 | if [ $UID -eq 0 ]
 6 | then
 7 |     SUDO=""
 8 | else
 9 |     SUDO="sudo"
10 | fi
11 | 
12 | # Install prerequisites
13 | if hash apt-get &>/dev/null
14 | then
15 |     $SUDO apt-get install build-essential liblzma-dev liblzo2-dev zlib1g-dev
16 | fi
17 | 
18 | # Make sure we're working in the same directory as the build.sh script
19 | cd $(dirname `readlink  -f $0`)
20 | 
21 | # Download squashfs4.3.tar.gz if it does not already exist
22 | if [ ! -e squashfs4.3.tar.gz ]
23 | then
24 |     wget https://downloads.sourceforge.net/project/squashfs/squashfs/squashfs4.3/squashfs4.3.tar.gz
25 | fi
26 | 
27 | # Remove any previous squashfs4.3 directory to ensure a clean patch/build
28 | rm -rf squashfs4.3
29 | 
30 | # Extract squashfs4.3.tar.gz
31 | tar -zxvf squashfs4.3.tar.gz
32 | 
33 | # Patch, build, and install the source
34 | cd squashfs4.3
35 | patch -p0 < ../patches/patch0.txt
36 | cd squashfs-tools
37 | make && $SUDO make install
38 | 


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/patches/README.md:
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 1 | Squashfs-Tools Version
 2 | ======================
 3 | 
 4 | The patches contained in this directory were built against squashfs tools v4.3, available on [Sourceforge](http://sourceforge.net/projects/squashfs/files/).
 5 | 
 6 | Modified Files
 7 | ==============
 8 | 
 9 | The following files have been modified from their original version:
10 | 
11 |  * compressor.c
12 |  * compressor.h
13 |  * error.h
14 |  * lzma_wrapper.c
15 |  * Makefile
16 |  * process_fragments.c
17 |  * read_fs.c
18 |  * squashfs_fs.h
19 |  * unsquashfs.c
20 |  * LZMA/lzmalt/WindowOut.h
21 |  * LZMA/lzmalt/LZMADecoder.c
22 |  * LZMA/lzmadaptive/C/7zip/Compress/LZMA_Lib/ZLib.cpp
23 |  * LZMA/lzmadaptive/C/7zip/Compress/LZMA_Lib/lzmadaptive.h
24 | 
25 | 


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/patches/patch0.txt:
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https://raw.githubusercontent.com/devttys0/sasquatch/bd864a1b037bf57ca7d64a292a60ba0d6459611f/patches/patch0.txt


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