RHBA-2010:0823 - Bug Fix Advisory

Topic

An updated tcsh package that fixes a bugs is now available.

Description

Tcsh is an enhanced and compatible version of the C shell (csh). It is a command
language interpreter, which can be used as an interactive login shell, as well
as a shell script command processor.

This updated tcsh package fixes the following bugs:

• Previously, under certain circumstances, a null pointer may have been

incorrectly dereferenced, causing the tcsh shell to terminate unexpectedly. With
this update, the pointer is now checked properly and tcsh no longer crashes.
(#631815)

• Previously, when command substitution with backquotes was used, extra fork()

was performed. With this update, only one fork() is performed. (#640251)

• Previously, if printexitvalue was set, tcsh returns the exit code as part of

the command output, rendering the output unusable. With this update, output of
command is correct. (#640252)

All users of tcsh are advised to upgrade to this updated package, which resolves
these issues.

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
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 - 631815 - null pointer dereference crashes tcsh
• BZ - 640251 - Extra fork when tcsh processes backquotes
• BZ - 640252 - tcsh obeys printexitvalue for back-ticks

CVEs

(none)

References

(none)