#!/bin/sh
# preinst script for milter-greylist
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <new-preinst> `install'
#        * <new-preinst> `install' <old-version>
#        * <new-preinst> `upgrade' <old-version>
#        * <old-preinst> `abort-upgrade' <new-version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package


case "$1" in
    install)
       SERVER_HOME=/var/lib/milter-greylist
       SERVER_USER=greylist
       SERVER_NAME="Greylist Milter"
       SERVER_GROUP=greylist

       # create user to avoid running server as root
       # 1. create group if not existing
       if ! getent group | grep -q "^$SERVER_GROUP:" ; then
          echo -n "Adding group $SERVER_GROUP.."
          addgroup --quiet --system $SERVER_GROUP 2>/dev/null ||true
          echo "..done"
       fi
       # 2. create homedir if not existing
       test -d $SERVER_HOME || mkdir $SERVER_HOME
       # 3. create user if not existing
       if ! getent passwd | grep -q "^$SERVER_USER:"; then
         echo -n "Adding system user $SERVER_USER.."
         adduser --quiet \
                 --system \
                 --ingroup $SERVER_GROUP \
                 --no-create-home \
                 --home $SERVER_HOME \
                 --disabled-password \
                 $SERVER_USER 2>/dev/null || true
         echo "..done"
       fi
       # 4. adjust passwd entry
       usermod -c "$SERVER_NAME" \
               -d $SERVER_HOME   \
               -g $SERVER_GROUP  \
                  $SERVER_USER
       # 5. adjust file and directory permissions
       if ! dpkg-statoverride --list $SERVER_HOME >/dev/null
       then
           # chown -R not needed as folder will be empty if it has
           # just been created. If not, package is getting updated
           # and it should have the owner set properly.
           chown $SERVER_USER:adm $SERVER_HOME
           chmod u=rwx,g=rxs,o= $SERVER_HOME
       fi
       # 6. Add the user to the ADDGROUP group
       if test -n $ADDGROUP
       then
           if ! groups $SERVER_USER | cut -d: -f2 | \
              grep -qw $SERVER_GROUP; then
                adduser $SERVER_USER $SERVER_GROUP
           fi
       fi
    ;;

    abort-upgrade|upgrade)
    ;;

    *)
        echo "preinst 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/13.14.1ubuntu5
if [ "$1" = "install" ] && [ -n "$2" ] && [ -e "/etc/init.d/milter-greylist" ] ; then
	chmod +x "/etc/init.d/milter-greylist" >/dev/null || true
fi
# End automatically added section


exit 0