| SQUASHFS 3.0 - A squashed read-only filesystem for Linux |
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| Copyright 2002-2006 Phillip Lougher <phillip@lougher.org.uk> |
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| Released under the GPL licence (version 2 or later). |
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| Welcome to the first release of Squashfs version 3.0. Squashfs 3.0 has the |
| the following improvements to 2.x. |
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| 1. Filesystems are no longer limited to 4 GB. In |
| theory 2^64 or 4 exabytes is now supported. |
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| 2. Files are no longer limited to 4 GB. In theory the maximum |
| file size is 4 exabytes. |
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| 3. Metadata (inode table and directory tables) are no longer |
| restricted to 16 Mbytes. |
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| 4. Hardlinks are now suppported. |
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| 5. Nlink counts are now supported. |
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| 6. Readdir now returns '.' and '..' entries. |
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| 7. Special support for files larger than 256 MB has been added to |
| the Squashfs kernel code for faster read access. |
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| 8. Inode numbers are now stored within the inode rather than being |
| computed from inode location on disk (this is not so much an |
| improvement, but a change forced by the previously listed |
| improvements). |
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| There is a new Unsquashfs utility (in squashfs-tools) than can be used to |
| decompress a filesystem without mounting it. |
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| Squashfs 3.0 supports 2.x filesystems. Support for 1.x filesystems |
| will be added in the future. |
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| 1. UNSQUASHFS |
| ------------- |
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| Unsquashfs has the following options: |
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| SYNTAX: unsquashfs [-ls | -dest] filesystem |
| -version print version, licence and copyright information |
| -info print files as they are unsquashed |
| -ls list filesystem only |
| -dest <pathname> unsquash to <pathname>, default "squashfs-root" |
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| The "-ls" option can be used to list the contents of a filesystem without |
| decompressing the filesystem data itself. |
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| The "-info" option forces Unsquashfs to print each file as it is decompressed. |
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| The "-dest" option specifies the directory that is used to decompress |
| the filesystem data. If this option is not given then the filesystem is |
| decompressed to the directory "squashfs-root" in the current working directory. |
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| Unsquashfs can decompress 3.0 filesystems. Support for 2.x and 1.x |
| filesystems will be added in the future. |
