Im trying to develop a shell script that will change the content order of the file.

For example I have a file that says
a
b
c
d

I want to change this to be
d
c
b
a

Im trying to use sed to this by reading the file and then inserting each line at the top

#!/usr/bin/ksh

PATCHFILE=patch_order
REVERSE=reverse_
REVERSEPATCHFILE=$REVERSE$PATCHFILE
TMP=.TMP

rm $REVERSEPATCHFILE$TMP

echo got here
while read PATCHNAME; do

sed -e "1i\\
$PATCHNAME" >$REVERSEPATCHFILE$TMP

#mv $REVERSEPATCHFILE$TMP $REVERSEPATCHFILE

done <$PATCHFILE

The problem is it just puts the lines in exactly the same order. Am i missing something?