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When converting a SquashFS image to a tarball, it makes no sense to
refuse conversion if the filename is considered evil by the OS.
This patch adds an option to is_filename_sane to check if the OS has
a problem with the given file name. sqfs2tar sets it to false and
converts everything while rdsquashfs sets it to true when unpacking.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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There were only a hand full of instances outside libsquashfs that used
the alloc code. In most cases, the thing allocated hat its size derived
from something already in memory anyway, so it is safe to assume its
size fits into a size_t.
At the same time, the opencoded Windows path conversion functions are
all unified into a single helper function.
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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AFAIK the only thing we can actually unpack on Windows is regular
files and directories, so only do that.
Furthermore, we have no way of setting Unix file attributes, so
skip that.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Instead, reconstruct the full path and use that instead. We do that
anyway if --quiet is not set.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Until now, filenames containing '/' or being equal to '..' or '.' where
not handled explicitly, because they are canonicalized later, which
will then fail.
This commit adds an explicit check to make those fail immediately with
a clear, specific error message.
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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Canonicalize the file names to make the diagnostics less scary.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This is a fully automated search and replace, i.e. I ran this:
git grep -l uint8_t | xargs sed -i 's/uint8_t/sqfs_u8/g'
git grep -l uint16_t | xargs sed -i 's/uint16_t/sqfs_u16/g'
git grep -l uint32_t | xargs sed -i 's/uint32_t/sqfs_u32/g'
git grep -l uint64_t | xargs sed -i 's/uint64_t/sqfs_u64/g'
git grep -l int8_t | xargs sed -i 's/int8_t/sqfs_s8/g'
git grep -l int16_t | xargs sed -i 's/int16_t/sqfs_s16/g'
git grep -l int32_t | xargs sed -i 's/int32_t/sqfs_s32/g'
git grep -l int64_t | xargs sed -i 's/int64_t/sqfs_s64/g'
and than added the appropriate definitions to sqfs/predef.h
The whole point being better compatibillity with platforms that may
not have an stdint.h with the propper definitions.
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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Use the directory reader from libsquashfs instead.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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We can't change the mod of symlinks and hence AT_SYMLINK_NOFOLLOW is
not supported by chmod(2 -> RTFM!).
The solution is to not use that flag and simply skip symlinks.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Do not try to change the nameless root node which is mapped to the
output 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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If -DNDEBUG is set, the entire thing is omitted from the output.
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 names generated by fstree are always in the correct format, but this
is still needed for the sake of documentation and to guide static
analysis tools.
Should canonicalize_name fail on an fstree generated name, something is
serverly broken.
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 utility programs pretty much all have the same structure of including
one central header per C file that includes all required library headers,
so we can simply include config.h which we need for large file support
from there and remove it from the C files.
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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Use a seperate variable to iterate over directory children and don't
modify n. Otherwise, the chown/chmod code below derefernces a null
pointer when trying to access n->name, n->uid and n->gid.
Bug found using scan-build.
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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The listing command has been used successfully to do the following:
- generate a prestine file system using gensquashfs
- repeate multiple times:
- generate a listing from the file system
- unpack only the regular files from the file system
- generate a new file system from the listing
- run `diff` on the old and new filesystem and admire that they
are identical
- replace the old file system with the new one, since they are
identical
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 changes the names of the tools to gensquashfs and rdsquashfs
so they don't collide with the names used by the squashfs-tools package
and the two can be installed side by side.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This allows the user to skip stuff like device special files (which
non-root can't create anyway) or to not create symlinks/fifos etc...
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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