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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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If read_retry fails to read the expected amount of data (EOF or otherwise),
it is almost always an error.
This commit renames read_retry to read_data and moves error handling
into the function, making a lot of error handling code redundant.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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If write_retry fails to write everything, it is *always* an error.
This commit renames write_retry to write_data and moves error handling
into the function, making a lot of error handling code redundant.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit extends the special case handling for sparse files to
generically support reading files that don't have a fragment but
instead have a trunkated final block.
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 adds support for packing sparse files into squashfs images
as follows:
- In the data writer: simply detect zero blocks and write a zero to the
block size field and don't emit any data. Record the number of bytes
saved this way. For fragments, set the fragment offset to invalid.
- In the inode writer: write out the number of bytes saved for sparse
files. If there should be a fragment but there is none, append a block
count of 0.
- In the data reader: if the block size is 0, read nothing from disk and
emit an empty block. Do the same if the fragment is missing.
- In the inode reader: restore the number of bytes saved for sparse files.
The sparse files can be packed and unpacked, but the unpacking will not
create sparse files for now.
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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