#!/bin/sh
# postinst script for iodine
#
# see: dh_installdeb(1)

CONFIGFILE=/etc/default/iodine
set -e
. /usr/share/debconf/confmodule

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <postinst> `abort-remove'
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package


case "$1" in
    configure)
        # we need a tun device
        if [ ! -c /dev/net/tun ] && [ -x /dev/MAKEDEV ] ; then
            echo "Creating device /dev/net/tun ..."
            cd /dev
            ./MAKEDEV tun || true
        fi

        # and we want a special user
        adduser --quiet --system --home /run/iodine iodine

        # generate/update /etc/default/iodine
        if [ ! -e $CONFIGFILE ]; then
            cat <<EOF >$CONFIGFILE
# Default settings for iodine. This file is sourced from
# /etc/init.d/iodined
START_IODINED=
IODINED_ARGS=
IODINED_PASSWORD=
EOF
        fi

        db_get iodine/start_daemon
        START_IODINED=$RET
        db_get iodine/daemon_options
        IODINED_ARGS=$RET
        db_get iodine/daemon_password
        IODINED_PASSWORD=$RET

        cp -a -f $CONFIGFILE $CONFIGFILE.tmp

        # If the admin deleted or commented some variables but then set
        # them via debconf, (re-)add them to the conffile.
        test -z "$START_IODINED" || grep -Eq '^ *START_IODINED=' $CONFIGFILE || \
            echo "START_IODINED=" >> $CONFIGFILE
        test -z "$IODINED_ARGS" || grep -Eq '^ *IODINED_ARGS=' $CONFIGFILE || \
            echo "IODINED_ARGS=" >> $CONFIGFILE
        test -z "$IODINED_PASSWORD" || grep -Eq '^ *IODINED_PASSWORD=' $CONFIGFILE || \
            echo "IODINED_PASSWORD=" >> $CONFIGFILE

        # PATTERN may contain variables, which will be interpolated every time the pattern search
        # is evaluated, except for when the delimiter is a single quote.
        # (perldoc perlop)
        perl -p -e "s'^ *START_IODINED=.*'START_IODINED=\"$START_IODINED\"'; \
                    s'^ *IODINED_ARGS=.*'IODINED_ARGS=\"$IODINED_ARGS\"'; \
                    s'^ *IODINED_PASSWORD=.*'IODINED_PASSWORD=\"$IODINED_PASSWORD\"';" \
            < $CONFIGFILE > $CONFIGFILE.tmp

        mv -f $CONFIGFILE.tmp $CONFIGFILE
        [ ! -e $CONFIGFILE ] || chmod 600 $CONFIGFILE
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

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

# tell debconf we are done. otherwise, it hangs waiting for the daemon.
db_stop;

# mask iodined.service if START_IODINED is not set to true
# this mimicks the behaviour of sysvinit. cf. #832599
if [ "$1" = "configure" ] ; then
    if [ "$START_IODINED" != "true" ] ; then
        deb-systemd-helper mask iodined.service >/dev/null || true
    fi
fi

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0