#! /bin/sh
# postinst script for ez-ipupdate
#
# see: dh_installdeb(1)

set -e

# Load the debconf library
. /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>
#        * <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
#
# quoting from the policy:
#     Any necessary prompting should almost always be confined to the
#     post-installation script, and should be protected with a conditional
#     so that unnecessary prompting doesn't happen if a package's
#     installation fails and the `postinst' is called with `abort-upgrade',
#     `abort-remove' or `abort-deconfigure'.

case "$1" in
  configure)
    # Create the user if it doesn't exist
    if ! id ez-ipupd 2>/dev/null 1>&2 ; then
        adduser --system --home /var/cache/ez-ipupdate \
            --shell /bin/false --gecos "Dynamic DNS client" \
            --disabled-password --disabled-login ez-ipupd
    fi
    # Create the default cache file
    touch /var/cache/ez-ipupdate/default-cache
    chown ez-ipupd /var/cache/ez-ipupdate/default-cache
    # Remove spurious cache file from the 3.0.11b8-2 broken package
    rm -f /var/cache/ez-ipupdate/cache-default
    # Create the default config file (maybe)
    db_get ez-ipupdate/service_type
    if [ "$RET" != "configure manually" ] ; then
        service="$RET"
        conf="/etc/ez-ipupdate/default.conf"
        newconf="$conf.dpkg-new"
        # Grab answers from debconf
        db_get ez-ipupdate/ppp
        ppp="$RET"
        db_get ez-ipupdate/username
        username="$RET"
        db_get ez-ipupdate/password
        password="$RET"
        db_get ez-ipupdate/hostname
        hostname="$RET"
        db_get ez-ipupdate/interface
        interface="$RET"
        echo "#!/usr/sbin/ez-ipupdate -c" > "$newconf"
        cat >> "$newconf" << EOF
###
###  Default ez-ipupdate configuration file - EDIT WITH CARE
###  Use \`dpkg-reconfigure ez-ipupdate' to update the debconf-generated lines.
###

###  The following lines were generated by debconf

service-type=$service
EOF
        db_get ez-ipupdate/server || RET=""
        if [ -n "$RET" ]; then
            echo "server=$RET" >> "$newconf"
        else
            echo "#server=(default)" >> "$newconf"
        fi
        cat >> "$newconf" << EOF
user=$username:$password
host=$hostname
interface=$interface
EOF
        db_get ez-ipupdate/dns_wildcard || RET="false"
        if [ "$RET" = "true" ]; then
            echo "wildcard" >> "$newconf"
        else
            echo "#wildcard" >> "$newconf"
        fi
        db_get ez-ipupdate/dns_mx || RET=""
        if [ -n "$RET" ]; then
            echo "mx=$RET" >> "$newconf"
        else
            echo "#mx=(none)" >> "$newconf"
        fi
        cat >> "$newconf" << EOF
run-as-user=ez-ipupd
cache-file=/var/cache/ez-ipupdate/default-cache
EOF
        if [ "$ppp" = "true" ]; then
            echo "#daemon" >> "$newconf"
        else
            echo "daemon" >> "$newconf"
        fi
        echo >> "$newconf"
        if grep -q '^###  Changes below this' "$conf" >/dev/null 2>&1; then
            sed -ne '/^###  Changes below this/,$p' < "$conf" >> "$newconf"
        else
            cat >> "$newconf" << EOF
###  Changes below this line will be preserved on upgrades.

EOF
        fi
	# Fix the file permissions
	chmod 700 "$newconf"
        rm -f "$conf" && mv "$newconf" "$conf"
	# Remove that old file, from broken 3.0.11b8-3 package
	rm -f "$conf.new"
    fi
    ;;

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

  *)
    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.

# Automatically added by dh_installinit/12.2.3
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -x "/etc/init.d/ez-ipupdate" ]; then
		update-rc.d ez-ipupdate defaults >/dev/null
		invoke-rc.d ez-ipupdate start || exit 1
	fi
fi
# End automatically added section


# ez-ipupdate is a bit misbehaved.
db_stop

exit 0