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[Zutils-bug] Zutils 1.8 released

From: Antonio Diaz Diaz
Subject: [Zutils-bug] Zutils 1.8 released
Date: Fri, 04 Jan 2019 00:11:20 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i586; en-US; rv: Gecko/20110420 SeaMonkey/2.0.14

I am pleased to announce the release of zutils 1.8.

Zutils is a collection of utilities able to process any combination of compressed and uncompressed files transparently. If any given file, including standard input, is compressed, its decompressed content is used. Compressed files are decompressed on the fly; no temporary files are created.

These utilities are not wrapper scripts but safer and more efficient C++ programs. In particular the '--recursive' option is very efficient in those utilities supporting it.

The utilities provided are zcat, zcmp, zdiff, zgrep, ztest and zupdate.
The formats supported are bzip2, gzip, lzip and xz.
Zutils uses external compressors. The compressor to be used for each format is configurable at runtime.

zcat, zcmp, zdiff, and zgrep are improved replacements for the shell scripts provided by GNU gzip. ztest is unique to zutils. zupdate is similar to gzip's znew.

The homepage is at http://www.nongnu.org/zutils/zutils.html

The sources can be downloaded from http://download.savannah.gnu.org/releases/zutils/

The sha256sum is:
07a47e1602be66a166bd3bf99c80efe2df889e2d407fadcd7ff83974762da337 zutils-1.8.tar.lz

This release is also GPG signed. You can download the signature by appending '.sig' to the URL. If the 'gpg --verify' command fails because you don't have the required public key, then run this command to import it:

  gpg --keyserver keys.gnupg.net --recv-keys 8FE99503132D7742

Key fingerprint = 1D41 C14B 272A 2219 A739  FA4F 8FE9 9503 132D 7742

Changes in version 1.8:

* A buffer overflow (CVE-2018-1000637) has been fixed in zcat which happened sometimes when the '-v, --show-nonprinting' option was used (or indirectly enabled). A canary byte has been added to the output buffer to prevent the buffer overflow from happening again.

* The option '-R, --dereference-recursive', which recursively follows symbolic links, has been added to zcat, zgrep, ztest and zupdate.

* The option '-r, --recursive' now skips symlinks that are encountered recursively.

* If no files are given to zcat, zgrep, ztest and zupdate, a recursive search will now examine the current working directory.

  * Recursive directory loops are now detected.

* zcat and zgrep now ignore directories given in the command line if '--recursive' is not specified, instead of reporting an error.

* Extra trailing slashes are now removed from directories given in the command line before recursing into them.

* zcat and zgrep now show the right error when they can't open an input file instead of showing "No such file or directory".

* Killed decompressors are now waited for, preventing failure caused by too many open pipes.

* Test and document that if a file fails to decompress, zcat, zgrep and ztest continue processing the rest of the files.

* Test and document that if an error happens while recompressing a file, zupdate exits immediately without recompressing the rest of the files.

* The configure script now accepts appending options to CXXFLAGS using the syntax 'CXXFLAGS+=OPTIONS'.

Please send bug reports and suggestions to address@hidden

Antonio Diaz, zutils author and maintainer.

If you care about long-term archiving, please help me replace xz with lzip. See http://www.nongnu.org/lzip/lzip_benchmark.html#xz1
http://www.nongnu.org/lzip/manual/lzip_manual.html#Quality-assurance and
http://www.nongnu.org/lzip/xz_inadequate.html Thanks.

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