Synopsis

ksh bug fix and enhancement update

Type/Severity

Bug Fix Advisory

Topic

Updated ksh packages that fix several bugs and add one enhancement are now
available for Red Hat Enterprise Linux 6.

Description

KSH-93 is the most recent version of the KornShell by David Korn of AT&T Bell
Laboratories. KornShell is a shell programming language which is also compatible
with sh, the original Bourne Shell.

This update fixes the following bugs:

• Originally, ksh buffered output of a subshell, flushing it when the subshell
  completed. This slowed certain processes that waited for a particular output,
  because they had to wait for the subshell to complete. Moreover, it made it
  difficult to determine the order of events. The new version of ksh flushes
  output of the subshell every time the subshell executes a new command. Thanks to
  this change, processes waiting for the subshell output receive their data after
  every subshell command and the order of events is preserved. (BZ#827512)
  
• Previously, the sfprints() function was unsafe to be called during the shell
  initialization, which could corrupt the memory. Consequently, assigning a
  right-aligned variable to a smaller size could result in inappropriate output
  format. With this update, the sfprints() call is no longer used in the described
  scenario, which fixes the format of the output. (BZ#846663)
  
• Due to a bug in the typeset command, when executed with the -Z option, output
  was being formatted to an incorrect width. As a result, exporting a
  right-aligned variable of a smaller size than the predefined field size caused
  it to not be prepended with the "0" character. A patch has been provided and the
  typeset command now works as expected in the aforementioned scenario.
  (BZ#846678)
  

In addition, this update adds the following enhancement:

• With this update, ksh has been enhanced to support logging of the shell
  output. (BZ#869155)
  

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

Fixes

(none)

CVEs

(none)

References

(none)

Red Hat Enterprise Linux Server 6

SRPM
ksh-20100621-19.el6.src.rpm	SHA-256: 7d0b5b14062712990bdca3dac0f074005118822f4ca1aafe1bab04ff8d0418fb
x86_64
ksh-20100621-19.el6.x86_64.rpm	SHA-256: c330af9ac58ab9cfbfd4e712a1760fb1f1038694b4a41c084c8bfdacf01b88a3
ksh-debuginfo-20100621-19.el6.x86_64.rpm	SHA-256: 778f22bb94559587edf84f3c12fdfdf9b1739e2081412e32b367dc0bc0119ed7
i386
ksh-20100621-19.el6.i686.rpm	SHA-256: 74e30b8f540b62a8b242214e136f00627abd6ac277ad5911ef775fb74ce58880
ksh-debuginfo-20100621-19.el6.i686.rpm	SHA-256: c613190287939ebd093060ee04d24f89b5307e3376c4d8225a9f65e218e0d07c

Red Hat Enterprise Linux Workstation 6

SRPM
ksh-20100621-19.el6.src.rpm	SHA-256: 7d0b5b14062712990bdca3dac0f074005118822f4ca1aafe1bab04ff8d0418fb
x86_64
ksh-20100621-19.el6.x86_64.rpm	SHA-256: c330af9ac58ab9cfbfd4e712a1760fb1f1038694b4a41c084c8bfdacf01b88a3
ksh-debuginfo-20100621-19.el6.x86_64.rpm	SHA-256: 778f22bb94559587edf84f3c12fdfdf9b1739e2081412e32b367dc0bc0119ed7
i386
ksh-20100621-19.el6.i686.rpm	SHA-256: 74e30b8f540b62a8b242214e136f00627abd6ac277ad5911ef775fb74ce58880
ksh-debuginfo-20100621-19.el6.i686.rpm	SHA-256: c613190287939ebd093060ee04d24f89b5307e3376c4d8225a9f65e218e0d07c

Red Hat Enterprise Linux Desktop 6

SRPM
ksh-20100621-19.el6.src.rpm	SHA-256: 7d0b5b14062712990bdca3dac0f074005118822f4ca1aafe1bab04ff8d0418fb
x86_64
ksh-20100621-19.el6.x86_64.rpm	SHA-256: c330af9ac58ab9cfbfd4e712a1760fb1f1038694b4a41c084c8bfdacf01b88a3
ksh-debuginfo-20100621-19.el6.x86_64.rpm	SHA-256: 778f22bb94559587edf84f3c12fdfdf9b1739e2081412e32b367dc0bc0119ed7
i386
ksh-20100621-19.el6.i686.rpm	SHA-256: 74e30b8f540b62a8b242214e136f00627abd6ac277ad5911ef775fb74ce58880
ksh-debuginfo-20100621-19.el6.i686.rpm	SHA-256: c613190287939ebd093060ee04d24f89b5307e3376c4d8225a9f65e218e0d07c

Red Hat Enterprise Linux for IBM z Systems 6

SRPM
ksh-20100621-19.el6.src.rpm	SHA-256: 7d0b5b14062712990bdca3dac0f074005118822f4ca1aafe1bab04ff8d0418fb
s390x
ksh-20100621-19.el6.s390x.rpm	SHA-256: 87bbe3fef646e5ed4344d62ca479b59ae74cd01c237cbff8e3f059cd15949143
ksh-debuginfo-20100621-19.el6.s390x.rpm	SHA-256: 5b9a2b69545fb4a8a420d28ac197c532a4aa8f9c76ad98c4341525ec24c8bf1a

Red Hat Enterprise Linux for Power, big endian 6

SRPM
ksh-20100621-19.el6.src.rpm	SHA-256: 7d0b5b14062712990bdca3dac0f074005118822f4ca1aafe1bab04ff8d0418fb
ppc64
ksh-20100621-19.el6.ppc64.rpm	SHA-256: 548f6d108fc34de7cac74d62fa3111f296cdcc807dff3e603f6a2fa68c2aabb7
ksh-debuginfo-20100621-19.el6.ppc64.rpm	SHA-256: ccbe3e21a64d742aa110752589cb789cc514bc5ad50b1935d8b1d5477af8a780

Red Hat Enterprise Linux for Scientific Computing 6

SRPM
ksh-20100621-19.el6.src.rpm	SHA-256: 7d0b5b14062712990bdca3dac0f074005118822f4ca1aafe1bab04ff8d0418fb
x86_64
ksh-20100621-19.el6.x86_64.rpm	SHA-256: c330af9ac58ab9cfbfd4e712a1760fb1f1038694b4a41c084c8bfdacf01b88a3
ksh-debuginfo-20100621-19.el6.x86_64.rpm	SHA-256: 778f22bb94559587edf84f3c12fdfdf9b1739e2081412e32b367dc0bc0119ed7

Red Hat Enterprise Linux Server from RHUI 6

SRPM
ksh-20100621-19.el6.src.rpm	SHA-256: 7d0b5b14062712990bdca3dac0f074005118822f4ca1aafe1bab04ff8d0418fb
x86_64
ksh-20100621-19.el6.x86_64.rpm	SHA-256: c330af9ac58ab9cfbfd4e712a1760fb1f1038694b4a41c084c8bfdacf01b88a3
ksh-debuginfo-20100621-19.el6.x86_64.rpm	SHA-256: 778f22bb94559587edf84f3c12fdfdf9b1739e2081412e32b367dc0bc0119ed7
i386
ksh-20100621-19.el6.i686.rpm	SHA-256: 74e30b8f540b62a8b242214e136f00627abd6ac277ad5911ef775fb74ce58880
ksh-debuginfo-20100621-19.el6.i686.rpm	SHA-256: c613190287939ebd093060ee04d24f89b5307e3376c4d8225a9f65e218e0d07c