/usr/src/openswan-2.6.38/packaging/utils/kernel.patch.gen.sh is in openswan-modules-dkms 1:2.6.38-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | #!/bin/bash
patchdir=`pwd`
kernelsrc=/usr/src/linux
[ "$1~" = "~" ] || kernelsrc=$1
cd $kernelsrc
# clean out destination file for all patch
#echo "">$patchdir/all
# find files to patch and loop
for i in `find . -name '*.preipsec'`
do
# strip off '.preipsec' suffix
j=${i%.preipsec}
# strip off './' prefix
k=${j#\.\/}
# single unified diff
#diff -u $i $j >>$patchdir/all
# convert '/' in filename to '.' to avoid subdirectories
sed -e 's/\//\./g' << EOI > /tmp/t
$k
EOI
l=`cat /tmp/t`
rm -f /tmp/t
# *with* path from source root
#echo do diff -u $i $j '>' $patchdir/$l
echo found $i
echo "RCSID \$Id: kernel.patch.gen.sh,v 1.6 2002/04/25 17:04:16 mcr Exp $" >$patchdir/$l
diff -u $i $j >>$patchdir/$l
done
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