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2019-12-13Merge windows and pthread thread pool implementationsDavid Oberhollenzer
Since they are both structured the same way using condition variables, they are only a few defines away from removing code duplication. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-13Cleanup data writerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-13Add --no-tail-packing option to gensquashfs, tar2sqfsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-12Don't kick off the threads until the queue is fullDavid Oberhollenzer
The idea is as follows: Initially let the user submit blocks until the queue is filled, then kick of the threads. Every thread will end up getting a block without any waits until they completely deplete the queue. Assuming the threads take longer to process the data than it takes the main thread to do I/O and submit new blocks, the queue should stay mostly filled with minimal wait times. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-12Fix thread pool queue accountingDavid Oberhollenzer
- ONLY manipulate the back log counter in the main thread. - Fix the order of operations when submitting blocks. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-12Fix out of bounds writes in lzo compressorDavid Oberhollenzer
The liblzo compression functions don't do any bounds checking, instead they expect the destination buffer to be large enough to hold the worst case encoding. This commit modifies the lzo compressor to use a scratch buffer for compression (with worst case size) and only copy to the actual destination if the result fits. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-12Fix "buffer to small" being treated as error in zstd compressorDavid Oberhollenzer
The zstd compress function returns an error code if it cannot fit the compressed data into the given destination buffer. This commit adds a check for this error and reports that the libsquashfs compressor implementation was unable to shrink the input instead of claiming a fatal error happened. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-12Fix: programs linking against libsquashfs also need pthreadDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-09Add github issue numbers to CHANGELOG.mdDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-09Update CHANGELOG.mdDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-09Only check for OS specific bad filenames when unpackingDavid Oberhollenzer
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>
2019-12-08Replace SetEvent synchronization with condition variablesDavid Oberhollenzer
It's cleaner, more stable and works pretty much the same way as the pthread version. The downside is that the minimum target for the library is now Windows Vista, or Server 2008. But both are over a decade old anyway, so this shouldn't be an issue. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-08Fix Windows file creation modeDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-08Add native Windows port of the multi-threaded data writerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-05Minor data writer cleanupDavid Oberhollenzer
Move "do block" function over to the rest of the block related code and internalizie the pthread worker structure. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-05Fix pthread data writer interfering with signal handlingDavid Oberhollenzer
If a signal is sent to a process, the POSIX spec says that ANY thread could be picked ARBITRARILY to handle the signal. In our case this could be one of the internal worker threads. The problem here is that an unsuspecting user of the library might suddenly have their signal handler run in parallel to their main thread and run into weird concurrency issues, because they didn't expect that to happen. In fact, the libsquashfs API tries to be transparent about whether or not it uses a thread pool internally and does everything other than number crunching (e.g. I/O that may happen through user supplied callbacks) in the same thread as the one that submitts the blocks. Unfortunately, pthread doesn't have a way to set a signal mask for the new thread and setting it inside the thread is racy (i.e. a signal might be delivered before the worker thread sets the mask). The only portable and non-racy way to do this, is to disable all signals in the calling thread that sets up the data writer, create the threads (which will inherit the mask) and then resetore the previous signal mask, hoping for the best. The downside to this is that signals may be lost in that short time. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-02Update man pagesDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-02Add a --root-becomes option to tar2sqfs and sqfs2tarDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-12-01Update CHANGELOG.mdDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-28Cleanup: Return combined return value from compressor id by nameDavid Oberhollenzer
Instead of returning the ID through a pointer and an error code as return status, return a single int that could be a compressor ID (positive values) or an error code (negative values). Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-25Polish up that configure scriptDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-25Cleanup: remove what is left of libutilDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-25Cleanup: move overflow safe alloc code into libsquashfsDavid Oberhollenzer
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>
2019-11-24Cleanup: completely move str_table into libsquashfs internalsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Cleanup: remove unused str_table functionsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Cleanup: move canonicalize_name back to libfstree.aDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Fix check of block size in super blockDavid Oberhollenzer
The check needs to include 1M, which is still a valid block size. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Cleanup libsquashfs invalid argument error codesDavid Oberhollenzer
- Add an explicit "you're holding it wrong" error code. - Consistently return error codes and not have some special places where -1 is returned. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Cleanup: split out sqfs_write_super similar to sqfs_read_superDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Cleanup: remove the entirely redundant sqfs_has_xattr functionDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Update CHANGELOG.mdDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Point URLs for mkwinbins.sh to infraroot mirrorDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Complete packaging in mkwinbins.shDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Update README, clarify licensing situationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Fix cross compilation settings for lz4David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Fix: Move LZO compressor from libsquashfs to libcommonDavid Oberhollenzer
The liblzo2 library is licensed under GPLv2, so it is not possible to distribute binaries of libsquashfs that link against liblzo2 under LGPL. This commit moves the LZO compressor implementation to libcommon, where this isn't a problem, since the tools themselves are licensed under GPLv3. It removes the ability of libsquashfs to read or generate LZO compressed SquashFS images, but the tools still can. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-24Fix mkwinbins linking against lzo, add zstdDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-23Fix: don't search for liblzo if the precious variable is already setDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-23Fix: add missing null-terminator in getline implementationDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-23Make sure the unit tests build with the mingw cross compilerDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-23Fix various data type problemsDavid Oberhollenzer
- Make sure the mockup constant for AT_FDCWD is actualy an int - Don't use %lld printf format specified, mscrt doesn't have that - On 64 bit windows, use %I64u format specified for size_t - Seperate the overflow macro stuff from the form specifier stuff - Move the whole thing to compat.h and clean it up a little so it becomes readable. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-23Add windows implementation for chdir in libcompatDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-23Move some unix header inclusions to compat.hDavid Oberhollenzer
In most cases, including unistd.h and fcntl.h was a left over anyway. In the cases where it was not, move it to compat.h. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-22Add fchownat/fchmodat mockups to libcompat for WindowsDavid Oberhollenzer
Not pretty, but definitely prettier than #ifdef hell. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-22Cleanup: move all the compatibillity fluff to a dedicated "libcompat"David Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-22Add *.exe and *.dll files to gitignoreDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-22Ensure that tar2sqfs & sqfs2tar set stdin/out to binary modeDavid Oberhollenzer
As usual, Windows has things different and is the platform where the problem was actually discovered. Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-19Remove no-tools restriction for windowsDavid Oberhollenzer
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-19Disable gensquashfs directory scanning on WindowsDavid Oberhollenzer
- We can only pack directories and files anyway. - What file modes should we use? Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
2019-11-19Make rdsquashfs unpack work on WindowsDavid Oberhollenzer
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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