RHBA-2012:0937 - Bug Fix Advisory

Topic

Updated zsh packages that fix one bug and add one enhancement are now available
for Red Hat Enterprise Linux 6.

Description

The zsh shell is a command interpreter which can be used as an interactive login
shell and as a shell script command processor. Zsh resembles the ksh shell (the
Korn shell), but includes many enhancements. Zsh supports command line editing,
built-in spelling correction, programmable command completion, shell functions
(with autoloading), a history mechanism, and more.

This update fixes the following bug:

• Prior to this update, the zsh shell attempted to execute mathematical

expressions in the "-n" option when running in ksh mode. As a consequence, zsh
emitted errors when running a syntax only check. This update modifies the source
code so that mathematical expressions are now handled like any other command
when using the "-n" option. (BZ#657300)

This update also adds the following enhancement:

• Prior to this update, a script whose location was listed in "$PATH" could not

be run with the zsh shell. With this update, users can call a script from
"$PATH" with the "-o pathscript" option to search path when zsh is invoked
directly. (BZ#612685)

All users are advised to upgrade to these updated packages, which fix this bug
and add this enhancement.

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/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 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 Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• 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 (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 - 657300 - Defect in ksh emulation of zsh

CVEs

(none)

References

(none)