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2020-03-19Fix: properly terminate the getopt_long arraysDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-19Fix compressor availability check in libcommonDavid Oberhollenzer
Initialize have_compressor to false before testing, to make the check work. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-19Fix destruction of NULL pointer in xattr reader cleanupDavid Oberhollenzer
This fixes a copy and paste error in the cleanup path, destroying a previously destroyed object again instead of the one being tested for. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-19Add references to the external testing & CI servicesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-19Add a script to semi-automate coverity scan submissionsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-19Add macOS workaround for lsetxattrDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-19Fix pthread_join check for valid thread handlesDavid Oberhollenzer
On Linux, checking for > 0 worked because pthread_t is internally an integer type. On other platforms (*caugh* Mac OS X *caugh*), it is typedefed to an opaque pointer, causing a warning if used in an integer relational comparison. The intended use is to allow the generic cleanup function to be used in the error path of the block processor creation function, while preventing pthread_join being called on threads that haven't been created at all. Since they are calloc'ed to 0, testing for non-zero values should suffice in both cases. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-19Fix xattr scanning on Mac OS XDavid Oberhollenzer
Mac OS X does not have llistxattr or lgetxattr. Instead, the listxattr and getxattr functions have additional an flag parameter that can be set to not follow symlinks. This commit adds a pre-processor define on OS X as a work around. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-19Improve travis CI build configurationDavid Oberhollenzer
- Build for arm64 and ppc64el as well as amd64. - Use a newer Ubuntu version. - Add a separate build for the serial (non-threaded) block processor. - Add a Mac OS X target. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-19Fix: don't use Linux specific st_mtim stat memberDavid Oberhollenzer
Always access the st_mtime field, which on Linux is #defined to a member of st_mtim. This fixes a travis CI build failure on Mac OS X. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-18Set a minimal libzstd version in autoconf scriptDavid Oberhollenzer
Version 1.3.1 is the first one which has fixed error codes exposed through the public API, which are used in the zstd compressor to determine whether compression *actually* failed or if the destination buffer was too small. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-18Fix build of lz4 compressor with older versions of liblz4David Oberhollenzer
Older versions of liblz4 don't define LZ4HC_CLEVEL_MAX. This commit adds a definition if liblz4 doesn't provide one. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-18Add basic travis CI configurationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-18Add a test case for xxhash32David Oberhollenzer
Technically the code was imported by a third party library, but some modifications have been made. This commit adds a simple test case with some test vectors and expected results that have to match. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-18Add a test for the minimal rb-tree implementationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-18Restore workaround for unaligned reads in xxhashDavid Oberhollenzer
The code was originally used inside the block processor, where 32 bit aligned data could be guaranteed. If it is available in libutil, I cannot possibly guarantee for alignment in future use elsewhere. Even for the block processor it was rather risky "remember this detail very well" buisness. This commit restores the unaligned read treatment of the original. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-18Cleanup: Move xxhash32 code to libutilDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-10Fix the printf format specifies (again)David Oberhollenzer
The PRIu64 et al are missing a "%" sign in front. Fixes: aaf7e68c75a907c3c08e83dfd2972665a0f1c1a3 Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-05Get rid of sqfs_compressor_existsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-05Change the signature of sqfs_compressor_create to return an error codeDavid Oberhollenzer
Make sure the function has a way of telling the caller *why* it failed. This way, the function can convey whether it had an internal error, an allocation failure, whether the arguments are totaly nonsensical, or simply that the compressor *or specific configuration* is not supported. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-05Cleanup: Remove the E_ prefix from all libsquashfs enumeratorsDavid Oberhollenzer
Avoid namespace polution. Make sure all exportet symbols are prefixed with either sqfs_ or SQFS_. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-04Fix block writer inheritance of sqfs_object_tDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-04Cleanup: match xattr reader API closer to id table APIDavid Oberhollenzer
Instead of creating everything in the "create" function, cleanup and create/initialize stuff in a "load" function. This allows the xattr reader to be reset/re-used and adds the benefit of not having to lug around references to the super block, compressor and file (altough the later two are hidden inside the meta reader). Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-04Add a generic copying mechanism to sqfs_object_tDavid Oberhollenzer
This patch adds a deep-copy callback to sqfs_object_t and removes the copying mechanism from sqfs_compressor_t. This is also interesting for other types. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-04Add a deep copy function for the str_table_t helperDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-01Add a "do not deduplicate" block flagDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-01Fix printf format specifies for sqfs_u64David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-01Fix: Replace bit shifts in parse_size with SZ_MUL_OVDavid Oberhollenzer
On 32 bit systems, size_t is a 32 bit integer and doing 64 bit shifts won't do us any good. So instead, use the existing size_t multiply and catch overflow macros. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-03-01Fix alloca in write_inode.c for windows buildDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-28Cleanup pax header parser a littleDavid Oberhollenzer
This commit tries to untangle the logic of parsing and sanitizing the pax header length field and the associated bounds checks. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-28Minor fix in file browser demoDavid Oberhollenzer
- Make sure to release the inode returne by the dir reader - Check the path resolution return code in change_directory Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-27Add initial benchmark data and discussionDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-27Fix: strictly verify compressor settings in config initializationDavid Oberhollenzer
Make sure the function throws an error if a given compressor ID or flag is not known. This way, libsquahfs supports *exactly* and *only* what the on-disk format specifies. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-27Add a function to the compressor interface to get the configurationDavid Oberhollenzer
This allows getting the compressor configuration back after creating it, for various purposes. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-23Remove the sqfs_inode_copy functionDavid Oberhollenzer
With unified payload size counters, copying an inode is now trivial. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-23Turn file inode management completely over to the block processorDavid Oberhollenzer
If the block processor allocates and dynamically resizes inodes on the fly, we can add data indefinitely without knowing the size of the file ahead of time. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-23Unify the payload counters in the sqfs_inode_generic_tDavid Oberhollenzer
Instead of having seperate counters for blocks, dir index bytes and having to fiddle out the link target size, simply use a single value that stores the number of payload bytes used. A seperate "payload bytes available" is used for dynamically growing inodes during processing. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22libcommon: stdin file: Fix size accounting for sparse filesDavid Oberhollenzer
The file has to report the "apparent size" for sparse files, but internally work with the actual size in the tar ball. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22Move inode size accounting completely to the block processorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22Cleanup block processor: merge common initialization codeDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22Cleanup block processor: Merge destructors for Windows & pthreadsDavid Oberhollenzer
Since the merged destructor checks if the objects it destroys were actually initialized, the pthread implementation can also replace its error path cleanup with simply calling the destructor. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22Try to clarify the parallel block processor documentationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22Add a seperate sqfs_block_processor_sync functionDavid Oberhollenzer
This function waits for all pending blocks to be written to disk, but doesn't flush the fragment block, so processing can continue afterwards as if nothing happened. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22Make hard link detection scale betterDavid Oberhollenzer
Instead of doing a linear search, which scales quadratically, use a red-black tree with inode numbers as key for finding hard links. To reiterate: we can't just use a flat table, because the SquashFS file is potentially untrusted and the inode numbers can be anything, no matter what the super block says. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-22Add a very simple red-black tree implementationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-21Update README & COPYINGDavid Oberhollenzer
- Add libutil to the README file - Try to make the COPYING file somewhat more comprehensible Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-21Cleanup: move utilities back out of libsquashfsDavid Oberhollenzer
This commit removes the allocation helpers and string table functions out of libsquashfs back into a "libutil.a". The problem of libsquashfs exporting stuff that it shouldn't is resolved by retaining the internal attributes and directly adding the source to libsquashfs instead of trying to somehow link against libutil.la. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-21Clarify directory header counter in format documentationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-21Update documentationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2020-02-20Thread pool block processor: Cleanup after restructuringDavid Oberhollenzer
- Merge duplicated code from append_to_work_queue and sqfs_block_processor_finish Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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