Shell Programming and Scripting

Hi All,

I am new to shell scripting and right now I am just limited to using the pre-written scripts. I am in to Infrastructure management where we use different scripts to get the information passed on to the monitoring tools. I am trying to use this script to get the information about the process consuming most CPU and it works for me in RHEL 5 machine but when I run on Solaris 10 box, I am getting the following error:

awk: syntax error near line 1
awk: illegal statement near line 1
./check_top_process.sh: line 39: [: ==: unary operator expected

The script is as follows:

#! /bin/sh
#
# Bill Beavis
#
# todo: better checking for commandline arguments
CLIMIT=80
WLIMIT=50
STATE_OK=0
STATE_CRITICAL=2
STATE_WARNING=1
print_help() {
echo ""
echo "Usage: check_top_process -w <warning> -c <critical>"
echo ""
echo "This plugin checks the top running process."
echo ""
exit 0
}
case "$1" in
-w)
WLIMIT=$2
CLIMIT=$4
;;
-c)
CLIMIT=$2
WLIMIT=$4
;;
--help)
print_help
exit $STATE_OK
;;
-h)
print_help
exit $STATE_OK
;;
*)
esac
if [ `echo $WLIMIT $CLIMIT |awk '{print ($1 > $2) ? "true" : "false" }'` = "true" ]
then
echo "Error: WARNING value must be below CRITICAL value"
print_help
exit $STATE_OK
fi

x=`UNIX95= ps -eo pcpu,comm,user,pid,time |sort -rnk1 | head -1`
y=`echo $x |awk '{print $1 "% command=" $2 " user=" $3 " pid=" $4 " cputime=" $5}'`
if [ `echo $x $CLIMIT |awk '{print ($1 > $6) ? "true" : "false" }'` = "true" ]
then
echo $y
exit $STATE_CRITICAL
fi
if [ `echo $x $WLIMIT |awk '{print ($1 > $6) ? "true" : "false" }'` = "true" ]
then
echo $y
exit $STATE_WARNING
fi
echo $y
exit $STATE_OK

I know that I am missing on something but am unable to find the exact issue. The script is giving errors on the lines highlighted in RED color.

Please help .....

Thanks in advance for your help.....

Amrit

Try /usr/xpg4/bin/awk:

Code:

/usr/xpg4/bin/awk '{print ($1 > $2) ? "true" : "false" }'

instead of:

Code:

awk '{print ($1 > $2) ? "true" : "false" }'

Hi Franklin,

Thanks a lot for your response. I changed it and the script is working perfect.

You were really of great help...