#!/bin/sh set -e case "$1" in upgrade|install) # Try to gracefully handle upgrades from a pre-0.3.3 version if [ ! -z $2 ]; then set +e dpkg --compare-versions $2 \<= 0.3.2-1 result=$? set -e if [ $result = 0 ]; then cat <<EOF Due to a bug in the way secret keys were encrypted in versions prior to 0.3.3, this version of gnupg is not backwards compatible with $2 which you have (had) installed on your system. There is an upgrade strategy (see /usr/doc/gnupg/NEWS.gz after this version is installed), but it requires an old copy of the gpg and gpgm EOF echo -n "binaries; shall I make copies of them for you (Y/n)? " read answer if [ ! "$answer" = "n" -a ! "$answer" = "N" ]; then cp /usr/bin/gpg /usr/bin/gpg.old cp /usr/bin/gpgm /usr/bin/gpgm.old echo "Okay, done. The old versions are /usr/bin/gpg*.old" else echo "Okay, I haven't made backups." fi; cat <<EOF If at any stage you need a pre-0.3.3 gnupg, you can find source and binaries for i386, m68k, alpha, powerpc and hurd-i386 at http://people.debian.org/~troup/gnupg/ Press return to continue EOF read foo fi; fi; ;; abort-upgrade) ;; esac