RHBA-2009:0463 - Bug Fix Advisory

Topic

Updated zsh packages that fix various bugs are now available.

Description

The zsh shell is a command interpreter usable 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.

These updated zsh packages provide fixes for the following bugs:

• when running a large number of processes, it was possible for duplicate

PID numbers to enter the job table. Under certain conditions, zsh would
wait forever for a process with the same PID as another, finished process,
to itself finish. With these updated packages, zsh is now able to determine
when jobs with the same PID numbers are both finished, or not, or one is
and not the other. (BZ#465455)

• zsh code blocks which started with the "$(" sequence and ended correctly

with a closing parenthesis ")", but which contained comments, were parsed
incorrectly. This has been fixed so that "$(..)" blocks which contain
comments are still parsed correctly, thus resolving possible syntax errors
in zsh commands and scripts. (BZ#484348)

All users of zsh are advised to upgrade to these updated packages, which
resolve these issues.

Solution

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

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 465455 - zsh may hang when re-using PIDs
• BZ - 484348 - Error parsing $(...)

CVEs

(none)

References

(none)