it appears i have a logic error in this script, i cant find it and am prepaired to blame bash (i wrote this in about 10 minutes in perl TWICE and it worked) after 5 hours on this i will never again write another bash script. why is this broken?

#!/bin/bash

FILENAME=dhcp.leases

if [[ "$1" == "" ]]
then
echo "Search term?"
else
start="lease $1 {"

cat $FILENAME | while read i
do
if [[ "$i" == "$start" ]]
then
echo $i
junk="works"
elif [[ "$junk" != "" ]]
then
echo $i
fi
if [[ $i == "}" ]]
then
junk=unset
fi
done
fi

thats it, the entire file

here is a dhcp.leases file
lease 10.2.56.35 {
starts 3 2003/08/20 12:24:45;
ends 4 2003/08/21 00:24:45;
hardware ethernet 00:e0:98:47:28:6c;
uid 01:00:e0:98:47:28:6c;
client-hostname "name";
}
lease 10.2.56.40 {
starts 3 2003/08/20 10:37:28;
ends 3 2003/08/20 22:37:28;
hardware ethernet 00:20:af:52:02:cf;
uid 01:00:20:af:52:02:cf;
client-hostname "thing";
}
lease 10.2.56.35 {
starts 3 2002/08/20 12:24:45;
ends 4 2002/08/21 00:24:45;
hardware ethernet 00:e0:28:87:b2:6c;
uid 01:00:e0:28:87:b2:6c;
client-hostname "name";
}




if one comments out the elif then the first line is returned (as asked for but nothing else as specified by the loop) but if the elif is not commented out then the entire file (well starting at the first entry in the list) is returned

Change this:

junk=unset

with this:

unset junk