RHBA-2012:0687 - Bug Fix Advisory

Topic

Updated tcsh packages that fix two bugs are now available for Red Hat Enterprise
Linux 6.

Description

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

This update fixes the following bugs:

• When using multiple shells simultaneously, the command history is saved from

all shells in one ".history" file. Previously, when running multiple csh scripts
at the same time, lines in the ".history" file could be reordered with different
timestamps or some of the entries could disappear, rendering the ".history" file
corrupted. As a consequence, start-up scripts could be slowed down. This update
implements file locking mechanism that uses shared readers and an exclusive
writer to prevent the ".history" file from being corrupted. (BZ#791232)

• Previously, the "anyerror" variable could be selected to set the tcsh exit

value behavior. However, "anyerror" is a shell variable and therefore was not
propagated to subshells, and could not globally affect csh scripts. This update
modifies the tcsh exit value behavior to the default behavior of csh: the new
"tcsh_posix_status" variable is now available instead of "anyerror" to allow
behavior similar to the POSIX standard. (BZ#798652)

All users of tcsh 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/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.2 i386
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.2 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.2 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 - AUS 6.2 x86_64
• 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 for IBM z Systems 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.2 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.2 i386
• Red Hat Storage 2.0 x86_64
• Red Hat Gluster Storage Server for On-premise 2.0 x86_64
• Red Hat Storage for Public Cloud (via RHUI) 2.0 x86_64
• 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 - 798652 - Fix regression in default $status value in case of lists/pipelines

CVEs

(none)

References

(none)