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Full Discussion: Variable scope in bash
Top Forums Shell Programming and Scripting Variable scope in bash Post 302589306 by haaru on Wednesday 11th of January 2012 09:03:38 AM
Old 01-11-2012
Variable scope in bash
Hello! Before you "bash" me with
- Not another post of this kind
Please read on and you will understand my problem...

I am using the below to extract a sum of the diskIO on a Solaris server.

Code:
#!/bin/sh
PATH=/usr/bin:/usr/sbin:/sbin; export PATH
TEMP1="/tmp/raw-sar-output.txt$$"
TEMP2="/tmp/sorted-sar-output.txt$$"
CONT=0
sar -d 30 4 > $TEMP1
AVG_START=`awk '/^Average/ {print NR}' $TEMP1`
TOT_LINES=`cat $TEMP1 |wc -l`
TAIL_LINES=`expr $TOT_LINES - $AVG_START`
tail -$TAIL_LINES $TEMP1 | awk '{ print $5,$2 }' | sort -k 1n,1 > $TEMP2
if [ -s "$TEMP2" ]
then
   while read file;
   do
      IO=`echo $file | awk '{ print $1 }'`
      TMP_VAL=`echo $file | awk '{ print $1 }'`
      CONT=`expr $CONT + $TMP_VAL`
   echo CONT = $CONT
   done < $TEMP2
   #Echo Result
   echo $CONT
else
   rm -f $TEMP1 $TEMP2 2>/dev/null
   exit 1
fi
rm -f $TEMP1 $TEMP2 2>/dev/null
exit 0

Even though I am not piping to while, the final
Code:
echo $CONT

returns zero.

The same code with Korn shell works perfectly but for some reason the execution is too slow and causes problems to the use I need it for. So I definately need to use Bash or something equally fast...

Please help!
This User Gave Thanks to haaru For This Post:
drbiloukos
 

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LEARN ABOUT DEBIAN

svc

svc(8)							      System Manager's Manual							    svc(8)

NAME

       svc - controls services monitored by supervise(8).

SYNOPSIS

       svc [ -udopchaitkx ] services

DESCRIPTION

       services consists of any number of arguments, each argument naming a directory used by supervise(8).

       svc applies all the options to each service in turn.

OPTIONS

       -u     Up. If the service is not running, start it. If the service stops, restart it.

       -d     Down. If the service is running, send it a TERM signal and then a CONT signal. After it stops, do not restart it.

       -o     Once. If the service is not running, start it. Do not restart it if it stops.

       -p     Pause. Send the service a STOP signal.

       -c     Continue. Send the service a CONT signal.

       -h     Hangup. Send the service a HUP signal.

       -a     Alarm. Send the service an ALRM signal.

       -i     Interrupt. Send the service an INT signal.

       -t     Terminate. Send the service a TERM signal.

       -k     Kill. Send the service a KILL signal.

       -x     Exit.   supervise(8)  will  exit	as  soon as the service is down. If you use this option on a stable system, you're doing something
	      wrong; supervise(8) is designed to run forever.

SEE ALSO

       supervise(8), svok(8), svstat(8), svscanboot(8), svscan(8), readproctitle(8), fghack(8),  pgrphack(8),  multilog(8),  tai64n(8),  tai64nlo-
       cal(8), setuidgid(8), envuidgid(8), envdir(8), softlimit(8), setlock(8)

       http://cr.yp.to/daemontools.html

																	    svc(8)
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