PREIN

/bin/sh

/usr/share/rpm-helper/add-user gdm $1 gdm /var/lib/gdm /bin/false 
/usr/share/rpm-helper/add-group gdm $1 xgrp gdm

PREUN

/bin/sh

if [ "$1" = "0" ]; then
 rm -f /usr/share/gdm/themes/mdk > /dev/null
fi

POSTIN

/bin/sh

#needed to update old gdm without removing new theme
#is removed by triggerpostun
if [ "$1" = "2" -a ! -L /usr/share/gdm/themes/mdk ]; then 
 mv /usr/share/gdm/themes/mdk  /usr/share/gdm/themes/mdk.to_remove
else 
 if [ ! -L /usr/share/gdm/themes/mdk ]; then
  ln -s -f ../../mdk/dm /usr/share/gdm/themes/mdk
 fi
fi

if [ -f //etc/X11/xdm/Xsession -a ! -x //etc/X11/xdm/Xsession ]; then
	chmod +x //etc/X11/xdm/Xsession
fi
if [ -x /usr/sbin/chksession ]; then /usr/sbin/chksession -g || true; fi


# Attempt to restart GDM softly by use of the fifo.  Wont work on older
# then 2.2.3.1 versions but should work nicely on later upgrades.
# FIXME: this is just way too complex
FIFOFILE=`grep '^ServAuthDir=' /etc/X11/gdm/custom.conf | sed -e 's/^ServAuthDir=//'`
if test x$FIFOFILE = x ; then
        FIFOFILE=/var/lib/gdm/.gdmfifo
else
        FIFOFILE="$FIFOFILE"/.gdmfifo
fi
PIDFILE=`grep '^PidFile=' /etc/X11/gdm/custom.conf | sed -e 's/^PidFile=//'`
if test x$PIDFILE = x ; then
        PIDFILE=/var/run/gdm.pid
fi
if test -w $FIFOFILE ; then
        if test -f $PIDFILE ; then
                if kill -0 `cat $PIDFILE` 2> /dev/null ; then
                        (echo;echo SOFT_RESTART) >> $FIFOFILE
                fi
        fi
fi
# ignore error in the above
exit 0

POSTUN

/bin/sh

/usr/share/rpm-helper/del-user gdm $1 gdm 
/usr/share/rpm-helper/del-group gdm $1 xgrp

Triggers

gdm < 2.8.0.0-2mdk

/bin/sh

if [ -d /usr/share/gdm/themes/mdk.to_remove ]; then 
  rm -fr /usr/share/gdm/themes/mdk.to_remove
  ln -s -f ../../mdk/dm /usr/share/gdm/themes/mdk
fi
#replace changed paths in gdm.conf
sed -i -e "s^/usr/bin/\(gdm[^ \t]\+\)^/usr/lib64/\1^g"  /etc/X11/gdm/gdm.conf