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This commit adds a function to libsquashfs.so for writing generic inodes
to a meta writer and another function to libsqfshelper.a that turns a
tree node to an inode. That way, the tree serialization code can be
expressed in terms of those functions and a bulk of the independend code
can be moved over to libsquashfs.so
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit adds a directory writer to libsquashfs that wrapps a meta
data writer and provides a higher-level interface for writing directory
entries. Under the hood it enforces the rules that squashfs insists
upon.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit moves stuff like printing help text, command line option
processing and enumerating available processors on stdout out of
the generic compressor code.
The option string is replaced with a structure that directly exposese
the tweakable parameters for all compressors. A function for parsing
the command line arguments into this structure is added in sqfshelper.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Move declarations for stuff that is defined in libsquashfs.so into the
public headers and declarations for stuff that isn't, out of there.
Also move the meta reader/writer helper functions to their respective
headers.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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In all cases where metadata blocks are read, we can roughly (in some
cases even preciesly) say in what range those metadata blocks will be,
so it makes sense to throw an error if an attempt is made to wander
outside this range.
Furthermore, when reading from an uncompressed block, it is more reasonable
to check against the actual block bounds than to padd it with 0 bytes.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit creates a new data structure called 'sqfs_reader_t' that
takes care of all the repetetive tasks like opening the file, reading
the super block, creating the compressor, deserializing an fstree and
creating a data reader.
This in turn makes it possible to remove all the duplicate code from
rdsquashfs and sqfs2tar.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit attempts to make the generic table writer more readable.
A few changes are made, including heap allocation of the block list.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Requires that config.h be included before other headers, since the macro
_FILE_OFFSET_BITS changes the definitions of things like 'struct stat'.
I chose to simply include it at the top of every C file and at
immediately after the double-inclusion guards of every header.
Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The idea is to move various higher level helper functions there.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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