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Since we need it twice (once for tar, once for the filemap xattr
parser), add a single, central implementation to libutil, add a
unit test for that implementation and then use it in both libtar
and gensquashfs.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Some of the on-disk format internals are moved to a separate header
and some of the stuff from internal.h is moved to that format header.
C++ guards are added in addtion.
Everything PAX related is moved to pax_header.c, some internal
functions are marked as static.
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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- Make sure the file actually has that many records before trying
to read one and fail if not.
- Use the helper macros for size_t overflow checking instead of
assuming size_t == uint64_t.
- Impose a "reasonable" upper bound on the number of data segments
and insist that there is at least one entry.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Contrary to previous claims, support for the GNU tar sparse format 1.0
was missing entirely (the newest of their 3 different sparse mapping
formats). This oversight wasn't caught, because the unit test was
compiling the wrong source file and tar2sqfs had no problem processing
the test file because it is still a valid POSIX-ish tar archive (but
the sparse part was missing and the mapping embedded in the file).
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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In libtar, the sizeof time_t checked when trying to store a time value.
It is pointless using the preprocessor here, as we can simply do an
if (sizeof(time_t) < ...) check and the compiler will take care
optimizing away one or the other branch.
After changing the libtar check and the corresponding unit tests, the
sizeof check can be removed from configure.ac, along with other unused
sizeof checks.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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Simply moving the pax header decoding to a separate file and splitting
out the common helper functions should be a good start.
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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- We don't have "endian.h" everywhere. On some BSDs its in sys and
on some BSDs the macros have different names.
- We definitely don't have sysmacros.h on non-Unix-like systems.
- Likewise for sys/types.h, sys/stat.h and their contents.
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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This only exists for tar2sqfs. Move the sparse file map to libtar
and add the ability to do this into the stind sqfs_file_t abstraction,
so it acts like a normal file but internally stitches the data
together from the sparse implementation.
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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Since they are read directly into memory, blindly allocating the size
from the tar ball is probably a bad idea.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit removes all the code for parsing and processing atime/ctime
and values and related test code.
Caring about those is kind of pointless because squashfs can only store
mtime in inodes. The only relevant place is when generating a struct
stat from a squashfs inode or an fstree node.
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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Some experiments seem to indicate that the various GNU extensions are
more widely supported than their POSIX equivalents[1]. Possibly because
they are easier to implement and possibly because of the wide spread
use of GNU tar.
This commit replaces the PAX writer in the write_tar_header implementation
with a GNU extension based writer.
The writer is also cleaned up by removing all global state. The record
counter is moved outside into the tar2sqfs program and passed in as
function argument.
[1] https://dev.gentoo.org/~mgorny/articles/portability-of-tar-features.html
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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This commit attempts to split some of the monolitic tar parsing code up
into multiple functions in seperate files. Also, some code duplication
(like reading a record into memory which was implemented twice) is
removed.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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