preinst is in iptables-persistent 1.0.4+nmu2.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
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 | #!/bin/sh
set -e
case "$1" in
install|upgrade)
if dpkg --compare-versions "$2" le "0.5.2"; then
update-rc.d -f iptables-persistent remove
fi
if [ -e /etc/iptables/rules ]; then
if [ -e /etc/iptables/rules.v4 ]; then
mv -f /etc/iptables/rules /etc/iptables/rules.v4.dpkg-old
else
mv -f /etc/iptables/rules /etc/iptables/rules.v4
fi
fi
;;
abort-upgrade)
;;
*)
echo "preinst called with unknown argument \`$1'" >&2
exit 1
;;
esac
# Automatically added by dh_installdeb
dpkg-maintscript-helper rm_conffile /etc/init.d/iptables-persistent 1~ -- "$@"
# End automatically added section
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