1.77.1. RHBA-2011:0304: ksh bug fix update
An updated ksh package that fixes multiple bugs is now available for Red Hat Enterprise Linux 5.
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:
* Due to a memory leak in the ksh executable, the performance of long running scripts could decrease significantly over the time. With this update, the underlying source code has been modified to prevent this memory leak, and the execution of long running scripts is no longer slowed down. (BZ#674552
* When a ksh script contained the "trap" command to capture a "SIGPIPE" signal, sending this signal by using the built-in "echo" command could cause its output to be incorrectly added to the redirected output of an external command. This error has been fixed, and ksh now flushes the output buffer before redirecting output streams. (BZ#675128
* Due to incorrect signal handling, receiving a signal while still processing the same one caused ksh to terminate unexpectedly with a segmentation fault. With this update, the subsequent signals are deferred until the current one is processed, and ksh no longer crashes. (BZ#675130
* Previously, assigning a value to an array variable during the execution of the "typeset" command could cause the shell to terminate unexpectedly with a segmentation fault. This update corrects the array handling in this command, and ksh no longer crashes. (BZ#675135
All users of ksh are advised to upgrade to this updated package, which resolves these issues.