Mail Archives: cygwin/2009/08/04/19:08:06
UnZip is an open-source, command-line alternative to other zip-format
archives such as WinZip, etc. unzip-6.0 is the latest release from
Info-Zip, http://www.info-zip.org/pub/infozip/UnZip.html.
This is a major feature release. It supports large files (> 2GiB)
and unicode file names.
This release is specific to cygwin-1.7. There is no corresponding
cygwin-1.5 release.
[[ compiled using gcc-3.4.4-999 ]]
CHANGES (since 5.52-10)
========================
o Update to latest release. Upstream changes detailed below.
o Enable unicode file name support. This is an experimental
feature, and requires zip-3.0-11 or better to create.
o Enable bzip2 decompression (Using custom build of bzip2
library for better error messages).
o Bring in debian patches from (sid) 6.0-1
Upstream changes (e.g. New for 6.0)
========================
o UnZip 6.0 finally supports nowadays "large" files of sizes > 2 GiB!
o This is the first release containing support for the PKWARE Zip64
enhancements.
o Major changes are:
- Support PKWARE ZIP64 extensions, allowing Zip archives and Zip archive
entries larger than 4 GiBytes and more than 65536 entries within a single
Zip archive. This support is currently only available for Unix,
OpenVMS and Win32/Win64.
- Support for bzip2 compression method.
- Support for UTF-8 encoded entry names, both through PKWARE's "General
Purpose Flags Bit 11" indicator and Info-ZIP's new "up" unicode path
extra field. (Currently, on Windows the UTF-8 handling is limited to
the character subset contained in the configured non-unicode "system
code page".)
- Fixed "Time of Creation/Time of Use" vulnerability when setting attributes
of extracted files, for Unix and Unix-like ports.
- Fixed memory leak when processing invalid deflated data.
- Fixed long-standing bug in unshrink (partial_clear), added boundary checks
against invalid compressed data.
- On Unix, keep inherited SGID attribute bit for extracted directories
unless restoration of owner/group id or SUID/SGID/Tacky attributes was
requested.
- On Unix, allow extracted filenames to contain embedded control characters
when explicitly requested by specifying the new command line option "-^".
- On Unix, support restoration of symbolic link attributes.
- On Unix, support restoration of 32-bit UID/GID data using the new "ux"
IZUNIX3 extra field introduced with Zip 3.0.
- Support for ODS5 extended filename syntax on new OpenVMS systems.
- Support symbolic links zipped up on VMS.
- New -D option to suppress restoration of timestamps for extracted
directory entries (on those ports that support setting of directory
timestamps). By specifying "-DD", this new option also allows to suppress
timestamp restoration for ALL extracted files on all UnZip ports which
support restoration of timestamps.
- On OS/2, Win32, and Unix, the (previously optional) feature UNIXBACKUP
to allow saving backup copies of overwritten files on extraction is now
enabled by default.
--
Charles Wilson
volunteer unzip maintainer for cygwin
====================================================================
To update your installation, click on the "Install Cygwin now" link
on the http://cygwin.com/ web page. This downloads setup.exe to
your system. Then, run setup and answer all of the questions.
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