postinst is in debian-ports-archive-keyring 2011.01.12.
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 32 33 34  | #! /bin/sh
# postinst script for debian-ports-archive-keyring
set -e
case "$1" in
    configure)
        apt-key add /usr/share/keyrings/debian-ports-archive-keyring.gpg > /dev/null
	
	# Debian Ports Archive Automatic Signing Key (2007) <ftpmaster@debian-ports.org>
	apt-key del 3E4C6047 2> /dev/null || true
	
	# Debian Ports Archive Automatic Signing Key (2008) <ftpmaster@debian-ports.org>
	apt-key del 43229C06 2> /dev/null || true
	# Debian Ports Archive Automatic Signing Key (2009) <ftpmaster@debian-ports.org>
	apt-key del 0917E535 2> /dev/null || true
    ;;
    remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
    ;;
    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
exit 0
 |