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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 MINIX
suspend
suspend(1) User Commands suspend(1) NAME
suspend - shell built-in function to halt the current shell SYNOPSIS
sh suspend csh suspend ksh suspend DESCRIPTION
sh Stops the execution of the current shell (but not if it is the login shell). csh Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su. ksh Stops the execution of the current shell (but not if it is the login shell). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5) SunOS 5.10 15 Apr 1994 suspend(1)