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Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The tar header has a 100 byte field for symlink and hard link targets.
If the target is longer than 100 bytes, an extension header has to be
used.
However, it is perfectly valid to fill all 100 bytes to the brim
without adding a null terminator. In case of a symlink, this can
result in garbage link targets, while for hard links it results in
an immediate error since the target cannot be resolved later on.
This commit attempts to fix the problem by replacing the strdup of
the link target with an strndup that copies at most the size of the
target header field.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit adds a --stat option to rdsquashfs that dumps a lot of
information about and inode that tunred out to be usefull in
debugging.
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 fixes a bug where the block processor state machine would
not add the "last block" flag if there is only one not entirely filled
block and the "don't fragment" flag is set. If the flag isn't set, the
inode start block position is not updated and points to the beginning
of the image instead.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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The source code of a modified liblz4 and zlib are included with the
option to compile them into libsquashfs if they are not available on
the system.
So far, the source code was included directly in the compressor sub
directory within libsqsuashfs. This commit moves the libraries out
into the lib directory.
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 an xattr value is stored OOL, the value actually holds an 8 byte
reference to another, previously stored value. This reference points
to the header that we need to read to know the actual size of the
value before reading it, not the value itself, so after reading the
reference and seeking to it, the xattr reader needs to read the actual
header.
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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Instead of doing the fragile size comparison in both loops, simply
bail from the function if offset is out of bounds, clamp the size
to the available range of the file and abail if it is zero.
As a result, a lot of checks can be removed and the function will not
return data beyond EOF.
This problem occoured with files that have a short last block instead
of a fragment.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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extras/browse is conditionally built if readline is available.
Signed-off-by: Matt Turner <mattst88@gmail.com>
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Missed in commit 259a98985b4f (Add flags to functions that might
logically be expanded in the future)
Signed-off-by: Matt Turner <mattst88@gmail.com>
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This commit fixes a build issue on BSD based systems, where alloca
is defined in stdlib.h and there is no such thing as "alloca.h".
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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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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It does not make any changes to the writer itself, so mark it as
const. This also requires some similar changes to the string table.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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After finding a match, reducing the reference count of the matched
elements and increasing them afterwards leaves the reference count
identical, because they refere to the same entries.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit moves the libsquashfs xattr related code into a sub
directory and splits the xattr writer code up into several files.
No actual code is changed.
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 a SquashFS archive contains file names with '..', '/' or similar
nonsense in them, the unpacking code already refuses to process them,
but the 'describe' code path simply triggers an assert that might not
be there if the binary was compiled with NDEBUG defined.
This commit replaces the assert with propper error handling that also
reports on why things are failing and adds an additional check in the
describe_tree function that tests if the file name is sane.
Reported-by: Zachary Dremann <dremann@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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Fragment deduplication really doesn't belong into the public API of
the fragment table.
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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Instead of the convoluted logic, simply use a small number of LUTs
that point to the available compressor flags for each compressor,
the avaialble options and their ranges.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Every compressor (except LC4) has a compression level parameter. This
commit pulls the compression level field out into the generic
configuration structure and applies some code clean ups as a result
from this.
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 LZMA compressor (through the xz-utils library) supports basically
the same options for micro management as the XZ compressor.
This commit enables support for those options in the compressor, the
option parser and adds an option field to the configuration structure.
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 propper defines in the super block header and removes
some of the hard coded constants.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Previously, the XZ compressor was called LZMA at some points in the
code, because it actually referres to LZMAv2 and the older LZMAv1
wasn't implemented. Since LZMAv1 is supported for some time now,
simply calling it LZMA is confusing.
This commit tries to replace the last bits where XZ is referred to
as LZMA, which turns out to be only a hand full of comments.
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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On a current Fedora 31, when cross compiling with mingw, pkg config
manages to find the Selinux library, but not the header. The configure
script disables WITH_SELINUX, but the library variable is still set,
causing a linker error further down the line.
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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- Move the xattr extraction and repacking to xattr.c
- Don't on-the-fly delete the tar xattr list, use the function
from libtar.a
- Split minor tasks into static helper functions
- creating a libtar xattr struct from libsqfs xattr data
- finding a hard link entry from current path and inode number
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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- Split up the huge file in bin/ into one small file per sub directory
- Remove the stub in doc/
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 breaks tar2sqfs.c into multiple files:
- options.c contains the command line argument processing
- process_tarball.c contains the main tar repacking code
- tar2sqfs.c contains what is left (the main function)
- A header is added for gluing it all together.
No actual code is changed. The tar repacking code is slightly modified
to pass the sqfs writer and input file pointer around as argument rather
than using a global variable.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This comit breaks sqfs2tar into multiple files:
- options.c contains the command line argument processing
- write_tree.c contains the code for generating the actual tar archive
- sqfs2tar.c contains what is left
- A header is added for glueing it all together.
No actual code is changed.
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 modifies the block processor to support operating without
a fragment table. If that is the case, fragment deduplication is
essentially disabled and fragment blocks aren't indexed anymore.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This function allows submission of raw blocks to the block processor,
completely bypassing the file API.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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