a piece of code, plz help to review

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07-20-2005

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a piece of code, plz help to review

use "getopts" to get params from command. Need replace black with a specified string like "%20

DEFAULT_DELIM＝％20
...
while getopts dek:f:t:vh OPTION
do
case $OPTION in
t)
DELIM=`tvar=/'"$OPTARG"'/ svar="$DEFAULT_DELIM" awk 'BEGIN{T=ENVIRON["tvar"];S=ENVIRON["svar"]; while(index(T,S)!=0){S=S"0"};print $S;exit}'`
for var in $OPTARG
do
if [ "$TMP" = "" ]
then
TMP=$var
else
TMP=$TMP$DELIM$var
fi
done
;;
...

Why DELIM is always null

Thanks.

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