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Issue with null value

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# 1  
Old 06-14-2012
Issue with null value
Hi,
I am trying below code. let me explain what is going on here.

Code:
xmitq=`echo "dis qr($queue) xmitq"|runmqsc $QMGR| tr ' ' '\n' | sed 's/^*//g'|grep "XMITQ"| cut -d '(' -f2| cut -d ')' -f1`
 
chl=`echo "dis chl(*) xmitq"| runmqsc $QMGR |egrep 'CHANNEL|XMITQ'|\
egrep -v 'CLUSSDR|CLUSRCVR|RCVR|SYSTEM|SVRCONN'|sed 's/CHANNEL(/+/g'|\
tr -d '\n'|tr '+' '\n'|grep "$xmitq"|sort -u|awk '{print $1}'|\
sed -e 's/(/ /' -e 's/)/ /'`
 
ip=`echo "dis chl("$chl") conname"|runmqsc $QMGR | tr ' ' '\n' | sed 's/*^//'| grep "CONNAME"| cut -d '(' -f2`
echo $xmitq,$chl, $ip

from xmitq we get some details and some times xmitq value can be null also...
based on xmitq we get $chl and from $chl we get $ip values
but here problem is when xmitq value is "null" it is throwing below exception

Code:
grep: RE error 41: No remembered search string.

So i am looking for if xmitq is null (no value) then it should print blank for $chl and $ip.
it is a loop for example if i get
$xmitq as first and firstchl and firstip are $chl, $ip values accordingly
$xmitq is null it should print blank values for $chl and $ip (if possible $ip is blank i would like to get "CONNAME" text in $ip place, it is optional)
$xmitq is eight and eightchl and eightip are $chl, $ip values accordingly
this loop continues untill we get xmitq values
# 2  
Old 06-14-2012
Please post what Operating System and version you are using.
Please post what Shell this is.

The solution is in the question:
"So i am looking for if xmitq is null (no value) then it should print blank for $chl and $ip."
Code:
if [ "${xmitq}""X" = "X" ]
then
       # set the other values to blank
else
       # derive the values
fi

There are tidier ways of determining if a variable is empty but this depends on the Shell you are running at the time.

Ideally post some sample input data and expected output data. We are not psychic.

Ps. I don't understand the bit about "eight" whatsoever or much or the other ramblings. A well-prepared example would help.
Has this post been through a translator from a foreign language?
Last edited by methyl; 06-14-2012 at 07:57 PM..
# 3  
Old 06-15-2012
It should work on SUNOS, Linux,HP- UX.. shell is ksh

---------- Post updated at 04:55 AM ---------- Previous update was at 04:02 AM ----------

command to grep exact value.. problem is if xmitq output is X and if anyother xmitq output also having x say "BX" it is taking that also
is there any command to grep exact xmitq value
i treid grep -w $xmitq but not working
# 4  
Old 06-15-2012
Try using awk and shell in this formulation when working with IBM MQ cli.

For instance, for XMITQ variable :

Code:
QUEUE=YOURQUEUE
QMGR=YOURQUEUEMANAGER
XMITQ=$(
(
runmqsc -e $QMGR <<EOF
dis qr($QUEUE) xmitq
EOF
) | awk '/XMITQ/{ print (match($0,/\([^ ].*\)/)) ? substr($0,RSTART+1,RLENGTH-2) : "NULL" } '
)
echo $XMITQ

This will return NULL string (or if you wish something else) if the XMITQ is non existant or set value to XMITQ if the output contains it.

Hope that helps.
Regards
Peasant.
# 5  
Old 06-18-2012
It is fixed now...

I have few more issues..

in "case"
Code:
SunOS) Echo "OS is SUN"
             version = `dspmqver'
               case $version in
                6) echo "sunos and not 5";;
                7) echo " sunos and not 5";;
esac;;
esac

for version 6 and 7 i need to write same output. in this case instead of writing two times or more than that.. is there any simple way to execute same thing for both 6 and 7?
# 6  
Old 06-19-2012
Use or
Code:
case $VAR in
6|7) It's $VAR
;;
esac

Please open new threads for new problems.

Regards
Peasant.
# 7  
Old 06-19-2012
There are syntax errors in the script snippet you post.
Remove space character either side of equals line.
Lose the extra ;; on the esac line.
Indent sensibly to make it easier to read

In this example the value 5 causes the script to execute the ":" command (i.e. do nothing) and any other value displays the message.
Code:
             version=`dspmqver'
             case $version in
                   5) : ;;
                   *) echo "sunos and not 5";;
             esac

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