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Shell Programming and Scripting
ksh behavior change on RHEL5
Post 302416759 by ygemici on Tuesday 27th of April 2010 04:20:05 PM
04-27-2010
Quote:
The cron was not running at the same time. I was done afterwards. The value expected from cron is 2 because cron spawns the script using Bourne shell (sh) as seen from the output.
infa 3962 3961 0 12:32 ? 00:00:00 /bin/sh -c /app2/stage/aim/aim_ap_etl/test.ksh > /app2/stage/aim/aim_ap_etl/test.out 2>&1
infa 3963 3962 0 12:32 ? 00:00:00 /bin/ksh /app2/stage/aim/aim_ap_etl/test.ksh
The primary issue that I'm dealing with is that the developers who created a script that runs on these hosts are producing different output since the patching. As you can see, the patched system is assigning the value of 3 when it should be 2 to the proc variables when run via cron.
infa 3962 3961 0 12:32 ? 00:00:00 /bin/sh -c /app2/stage/aim/aim_ap_etl/test.ksh > /app2/stage/aim/aim_ap_etl/test.out 2>&1
infa 3963 3962 0 12:32 ? 00:00:00 /bin/ksh /app2/stage/aim/aim_ap_etl/test.ksh
The primary issue that I'm dealing with is that the developers who created a script that runs on these hosts are producing different output since the patching. As you can see, the patched system is assigning the value of 3 when it should be 2 to the proc variables when run via cron.
Maybe when your ps value send to variable kernel show another process that named called script..
Maybe
Code:
root 14760 14747 0 06:43 pts/1 00:00:00 [script]
Or you must put same lines after variables again in your code
Again lets see output
Code:
/bin/ps -ef | /bin/grep -v grep | /bin/grep $SCRIPT | /usr/bin/wc -l echo "-----------" /bin/ps -ef | /bin/grep -v grep | /bin/grep $SCRIPT proc1=`ps -ef | /bin/grep -v grep | /bin/grep -c $SCRIPT` echo "proc1=$proc1" /bin/ps -ef | /bin/grep -v grep | /bin/grep -c $SCRIPT proc2=$( (ps -ef | /bin/grep -v grep | /bin/grep -c $SCRIPT) ) echo "proc2=$proc2" /usr/bin/pgrep $SCRIPT | /usr/bin/wc -l proc3=$(/usr/bin/pgrep $SCRIPT | /usr/bin/wc -l) echo "proc3=$proc3" /bin/ps -ef | /bin/grep -v grep | /bin/grep $SCRIPT | /usr/bin/wc -l
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LEARN ABOUT SUNOS
shells
shells(4) File Formats shells(4) NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list. Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)). FILES
/etc/shells lists shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.10 4 Jun 2001 shells(4)