zipunsplit is a tiny tool for joining split zip files, as defined in section 8.2 of the specification. These are zip files that make use of the disk number fields in the headers.
It works by combining all of the split files and updating the disk-relative offset fields to absolute offsets. Most well-formed split zips, including those that use zip64, are supported. The exceptions are:
- Zip files with encrypted central directory entries are not supported.
- Zip files with an archive comment field that contains the EOCD magic bytes (
PK\x05\x06) are not supported. - Zip files that were split naively (i.e. rejoinable by simple concatenation) are not supported.
zipunsplit -o <output> [<input> ...]
For example:
zipunsplit -o output.zip input.z01 input.z02 input.zip
The inputs must be specified in the proper order. Usually, the files are named with the .z<number> extension, with the .zip being the last file.
The output will be a well-formed regular unsplit zip file. It is guaranteed that writing to the output file is done sequentially. Writing to a pipe is supported.
First, make sure the Rust toolchain is installed. Then, run:
cargo build --release
The resulting executable will be in target/release/zipunsplit or target\release\zipunsplit.exe.
The logic is all implemented in the zipunsplitlib library in this repo. It is only split out of zipunsplit because it is used by another (unpublished) personal project. There are no API stability guarantees. The semver versioning applies to CLI usage only.
zipunsplit is licensed under the GPLv3 license. For details, please see LICENSE.