EDIT

#!/bin/sh -e

# postinst script for cdmserver

#

# see: dh_installdeb(1)

#

# variables

#

CDM_HOME="/opt/cdmserver"

TEMPLATE_DIR="/opt/cdmserver/templates"

CDM_LOG="/var/log/cdmserver"

INIT_SCRIPT="cdmserver"

ETC_CDMSERVER="/etc/cdmserver"

CDM_USER=cdm

CDM_GROUP=cdm

CDM_USER_HOME=$CDM_HOME

#

# functions

#

userExist(){

    grep "$1:" /etc/passwd > /dev/null

    [ $? -eq 0 ] && return $TRUE || return $FALSE

}

groupExist(){

    grep "$1:" /etc/group > /dev/null

    [ $? -eq 0 ] && return $TRUE || return $FALSE

}

# 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)

    #

    # adding the group

    # if the group already exist will be deleted

    #

    if ( groupExist $CDM_GROUP  )

    then

      echo "group '$CDM_GROUP' alreday exists"

    else

      echo "creating group '$CDM_GROUP'"

      groupadd $CDM_GROUP

    fi

    #

    # adding the user

    #

    if ( userExist $CDM_USER )

    then

      echo "user '$CDM_USER' alreday exists"

    else

      echo "creating user '$CDM_USER'"

      useradd -g $CDM_GROUP -d $CDM_USER_HOME $CDM_USER

    fi

    #

    # adjusting permissions of init script user and group should be root

    #

    chmod 755 /etc/init.d/$INIT_SCRIPT

    #

    # create log file folder and set owner:group

    #

    if [ ! -d $CDM_LOG ]; then

        mkdir -p $CDM_LOG

    fi

    chown -R $CDM_USER:adm $CDM_LOG

    #

    # if /etc/cdmserver is not yet existing

    # copy the content of template/.cdmLibrary into

    # /etc/cdmserver

    #

    if [ ! -d $ETC_CDMSERVER ]

    then

      mkdir -p $ETC_CDMSERVER

      cp -r $TEMPLATE_DIR/etc/cdmserver/* $ETC_CDMSERVER/

    fi

    if [ ! -e /etc/default/cdmserver ]

    then

      cp $TEMPLATE_DIR/etc/default/cdmserver /etc/default/cdmserver

    fi

	#

	# create a .cdmLibrary folder in user home, it will hold temporary files

	# and symlinks to the configfiles

	#

	if [ ! -e $CDM_USER_HOME/.cdmLibrary ]

	then

		mkdir $CDM_USER_HOME/.cdmLibrary

	fi

	cd $CDM_USER_HOME/.cdmLibrary

    ln -sf $ETC_CDMSERVER/datasources.xml datasources.xml

    ln -sf $ETC_CDMSERVER/cdm-server-realm.properties cdm-server-realm.properties

    # clean up

    rm -rf $TEMPLATE_DIR

    #

    # set group and owner for home directory

    #

    chown -R $CDM_USER:$CDM_GROUP $CDM_HOME

    # let the cdm server start automatically on boot

    update-rc.d $INIT_SCRIPT defaults 98 02

    # start the server manually this time ignoring errors

    /etc/init.d/$INIT_SCRIPT start || true

    ;;

    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.

#DEBHELPER#

exit 0