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61 lines
2.0 KiB
61 lines
2.0 KiB
4 months ago
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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
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the following improvements to 2.x.
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1. Filesystems are no longer limited to 4 GB. In
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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
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file size is 4 exabytes.
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3. Metadata (inode table and directory tables) are no longer
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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
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the Squashfs kernel code for faster read access.
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8. Inode numbers are now stored within the inode rather than being
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computed from inode location on disk (this is not so much an
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improvement, but a change forced by the previously listed
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improvements).
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There is a new Unsquashfs utility (in squashfs-tools) than can be used to
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decompress a filesystem without mounting it.
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Squashfs 3.0 supports 2.x filesystems. Support for 1.x filesystems
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will be added in the future.
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1. UNSQUASHFS
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-------------
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Unsquashfs has the following options:
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SYNTAX: unsquashfs [-ls | -dest] filesystem
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-version print version, licence and copyright information
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-info print files as they are unsquashed
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-ls list filesystem only
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-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
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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
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the filesystem data. If this option is not given then the filesystem is
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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
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filesystems will be added in the future.
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