#!/bin/sh

set -e

# Debian Postfix preinst
# LaMont Jones <lamont@debian.org>
# Modified to use debconf by Colin Walters <levanti@verbum.org>

# do we have debconf?
if [ -f /usr/share/debconf/confmodule ]; then
    . /usr/share/debconf/confmodule
    DEBCONF=true
else
    DEBCONF=
fi

(umask 022; mkdir -p /var/spool/postfix)

case "$1" in
    install)
	rm -f /var/spool/postfix/restart /var/spool/postfix/reload

	if [ -L /etc/postfix/postfix-script ]; then
		rm -f /etc/postfix/postfix-script
	fi

	;;

    upgrade)
	if [ -d /var/spool/postfix ] && [ -f /etc/postfix/main.cf ]; then
	    touch /var/spool/postfix/restart
	fi
	export LANG=C	# for the comparison of mail version...

	if [ -L /etc/postfix/postfix-script ]; then
		rm -f /etc/postfix/postfix-script
	fi

	# If user has not modified master/main.proto, move aside so new version
	# is installed (#991513)
        cmp -s /usr/share/postfix/main.cf.dist /etc/postfix/main.cf.proto && \
	    mv /etc/postfix/main.cf.proto /etc/postfix/main.cf.proto.old \
	    || echo "/etc/postfix/main.cf.proto modified, not updating."
        cmp -s /usr/share/postfix/master.cf.dist /etc/postfix/master.cf.proto && \
	    mv /etc/postfix/master.cf.proto /etc/postfix/master.cf.proto.old \
	    || echo "/etc/postfix/master.cf.proto modified, not updating."

	;;

    abort-upgrade)
	if [ -f /etc/postfix/main.cf.proto.old ]; then
	  mv /etc/postfix/main.cf.proto.old /etc/postfix/main.cf.proto
	  echo "Restoring old /etc/postfix/main.cf.proto on failed upgrade."
	fi
	if [ -f /etc/postfix/master.cf.proto.old ]; then
	  mv /etc/postfix/master.cf.proto.old /etc/postfix/master.cf.proto
	  echo "Restoring old /etc/postfix/master.cf.proto on failed upgrade."
	fi
	;;

    *)
	echo "preinst called with unknown argument \`$1'" >&2
	exit 1
	;;
esac

if [ install = "$1" ] || [ upgrade = "$1" ]; then
    # cleanup after past mistakes.
    rm -f /usr/sbin/postconf.postfix
    dpkg-divert --package postfix-tls --remove \
	 --divert /usr/sbin/postconf.postfix \
		  /usr/sbin/postconf >/dev/null 2>/dev/null
fi

# Automatically added by dh_installdeb/13.15.3
dpkg-maintscript-helper rm_conffile /etc/postfix/makedefs.out 3.3.2-4\~ postfix -- "$@"
# End automatically added section
# Automatically added by dh_installinit/13.15.3
if [ "$1" = "install" ] && [ -n "$2" ] && [ -e "/etc/init.d/postfix" ] ; then
	chmod +x "/etc/init.d/postfix" >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.15.3
if [ -z "${DPKG_ROOT:-}" ] && [ "$1" = upgrade ] && [ -d /run/systemd/system ] ; then
	deb-systemd-invoke stop 'postfix-resolvconf.path' 'postfix-resolvconf.service' >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.15.3
if [ -z "${DPKG_ROOT:-}" ] && [ "$1" = upgrade ] && [ -d /run/systemd/system ] ; then
	deb-systemd-invoke stop 'postfix.service' >/dev/null || true
fi
# End automatically added section