RHBA-2014:0769 - Bug Fix Advisory

Topic

Updated xz packages that fix several bugs are now available for Red Hat
Enterprise Linux 6.

Description

XZ Utils is an integrated collection of user-space file compression utilities
based on the Lempel-Ziv-Markov chain algorithm (LZMA), which performs lossless
data compression. The algorithm provides a high compression ratio while keeping
the decompression time short.

This update fixes the following bugs:

• Previously, the '-h' option of the xzgrep command was not included. As a

consequence, the matching lines in the output were prefixed with the
corresponding file names. This update adds the '-h' option, and running the
'xzgrep -h' command now suppresses the file name on output as expected.
(BZ#850898)

• Prior to this update, running the 'xzgrep -l' command did not work correctly

because the source code did not handle the '-q' option appropriately. As a
consequence, an error message was displayed. A patch has been applied to handle
the 'grep -q' command in the source code correctly. As a result, running the
'xzgrep -l' suppresses normal output and prints file names with a matching line
as expected. (BZ#863024)

• The xzfgrep command is supposed to act as an alias for the 'xzgrep -F'

command. Previously, this alias behavior was not set correctly, and the patterns
were processed as regular expressions and not as fixed strings. As a
consequence, running the xzfgrep command produced no output. With this update,
xzfgrep command works as an alias of the 'xzgrep -F' command, and running the
xzfgrep command returns correct output. (BZ#988703)

• Previously, the xzgrep command returned exit status 1 when contents of one or

more files did not match the requested pattern. With this update, xzgrep returns
exit status 0 if there is at least one match of the pattern, which makes the
xzgrep behavior consistent with the default grep command behavior. (BZ#1108085)

Users of xz are advised to upgrade to these updated packages, which fix these
bugs.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 863024 - `xzgrep -l word filename.xz` fails with "grep: -q: No such file or directory"
• BZ - 1108085 - xzgrep returns wrong exitcode if match isn't found in every file

CVEs

(none)

References

(none)