UNIX amature/novice. I've written a script (it works) that needs to be cleaned up. I'm searching for a way to perform a "go to , perform this then return" section of code. The books I have and searches i"ve done so far do not show me how to do this. I've pasted in the current code below. I've actually cut out about 75% of the actual script to keep it somewhat brief. So what I'm looking for is a way to cut out the numerous FTP and diff lines since those contain the variables.

Thanks in advance.

#!/usr/bin/ksh

# script to compare current system parameters and constants against
# a known good reference file for each stepper.
# Todd Jones - October 2007



cp blank.dat scan.dat;
cp blank.dat sum.dat;
cp blank.dat err.dat;

now=`date '+%D %T'`
echo "Nikon reference file comparison" >> sum.dat;
echo "" >> sum.dat;
echo ${now} >> sum.dat;
echo "" >> sum.dat;
echo "Files compared" >> sum.dat;
echo "Files with differnces are listed in the summary" >> sum.dat;
echo "and the diferences are appended below" >> sum.dat;
echo "" >> sum.dat


# *** open and read the stepper name

while read tool
do
if [ "${tool}" = 'nsr9' ]; then
machID='AD29018'
elif [ "${tool}" = 'nsr10' ]; then
machID='AD29028'
elif [ "${tool}" = 'nsr11' ]; then
machID='AD33005'
elif [ "${tool}" = 'nsr12' ]; then
machID='AD35001'
elif [ "${tool}" = 'nsr13' ]; then
machID='AD37005'
else
echo 'nope'
fi


# system parameter files
direct='mcsvsys.parm'

filename="mac_adjust_230.${machID}"
ftp -i nsr100 <<EOF
get ${tool}\"mcsv\ pass\"::[${direct}]${filename} ${tool}/${filename}.now
quit
EOF

diff ${tool}/${filename}.now ${tool}/${filename}.std >> temp.txt

if [ "$?" = '1' ]; then
echo "${tool} ${direct} ${filename} differences exist" >> sum.dat
echo "${tool} ${direct} ${filename}" >> scan.dat
echo "" >>scan.dat
temp.txt >> scan.dat
echo "###############################" >> scan.dat
echo "" >> scan.dat
else
echo "${tool} ${direct} ${filename}" >> sum.dat
fi


filename="sys_param_230.${machID}"
ftp -i nsr100 <<EOF
get ${tool}\"mcsv\ pass\"::[${direct}]${filename} ${tool}/${filename}.now
quit
EOF

diff ${tool}/${filename}.now ${tool}/${filename}.std >> temp.txt

if [ "$?" = '1' ]; then
echo "${tool} ${direct} ${filename} differences exist" >> sum.dat
echo "${tool} ${direct} ${filename}" >> scan.dat
echo "" >>scan.dat
temp.txt >> scan.dat
echo "###############################" >> scan.dat
echo "" >> scan.dat
else
echo "${tool} ${direct} ${filename}" >> sum.dat
fi


filename='ilm_param.ilch'
ftp -i nsr100 <<EOF
get ${tool}\"mcsv\ pass\"::[${direct}]${filename} ${tool}/${filename}.now
quit
EOF

diff ${tool}/${filename}.now ${tool}/${filename}.std >> temp.txt

if [ "$?" = '1' ]; then
echo "${tool} ${direct} ${filename} differences exist" >> sum.dat
echo "${tool} ${direct} ${filename}" >> scan.dat
echo "" >>scan.dat
temp.txt >> scan.dat
echo "###############################" >> scan.dat
echo "" >> scan.dat
else
echo "${tool} ${direct} ${filename}" >> sum.dat
fi


filename='multi_af_parameter.mpaf'
ftp -i nsr100 <<EOF
get ${tool}\"mcsv\ pass\"::[${direct}]${filename} ${tool}/${filename}.now
quit
EOF

diff ${tool}/${filename}.now ${tool}/${filename}.std >> temp.txt

if [ "$?" = '1' ]; then
echo "${tool} ${direct} ${filename} differences exist" >> sum.dat
echo "${tool} ${direct} ${filename}" >> scan.dat
echo "" >>scan.dat
temp.txt >> scan.dat
echo "###############################" >> scan.dat
echo "" >> scan.dat
else
echo "${tool} ${direct} ${filename}" >> sum.dat
fi

# *** close list to read stepper
done < nsrlist

scan.dat >> sum.dat