if [ -x usr/bin/rarian-sk-update ]; then
  usr/bin/rarian-sk-update 1> /dev/null 2> /dev/null
fi

if [ -x usr/bin/update-desktop-database ]; then
  usr/bin/update-desktop-database 1> /dev/null 2> /dev/null
fi

function install_file() {
  # $1 = File to process

  FILE="$(dirname "$1")/$(basename "$1" .new)"
  if [ ! -e "$FILE" ]
  then
    mv "$FILE.new" "$FILE"
  elif [ "$(cat "$FILE" | md5sum)" != "$(cat "$FILE.new" | md5sum)" ]
  then
    #     |--------|--------------------------------------------------|
    echo "WARNING: $FILE has been customised."
    echo "         Examine the $FILE.new file"
    echo "         and integrate any changes into the custom file."
    echo
  else
    rm -f "$FILE.new"
  fi
}

install_file etc/X11/gdm/Xsession.new
install_file etc/X11/gdm/custom.conf.new
install_file etc/X11/gdm/PreSession/Default.new
install_file etc/X11/gdm/PostSession/Default.new
install_file etc/X11/gdm/PostLogin/Default.new

# Remove the gdm user+group if it doesn't have the standard Slackware UID/GID.
# This is needed because a previous install may have added them with an id of
# 95, rather than using the Slackware default of 42.
if grep "^gdm:[^:]*:95:" etc/passwd >/dev/null 2>&1; then
  cat etc/passwd >etc/passwd.gsb
  cat etc/passwd.gsb | grep -v "^gdm:[^:]*:95:" >etc/passwd
  if [ $? -ne 0 ]; then
    # Don't leave etc/password in an unknown state.
    cat etc/passwd.gsb >etc/passwd
    #     |--------|--------------------------------------------------|
    echo "WARNING: Failed to remove old gdm user."
  fi
  rm etc/passwd.gsb
fi
if grep "^gdm:[^:]*:95:" etc/group >/dev/null 2>&1; then
  cat etc/group >etc/group.gsb
  cat etc/group.gsb | grep -v "^gdm:[^:]*:95:" >etc/group
  if [ $? -ne 0 ]; then
    # Don't leave etc/group in an unknown state.
    cat etc/group.gsb >etc/group
    #     |--------|--------------------------------------------------|
    echo "WARNING: Failed to remove old gdm group."
  fi
  rm etc/group.gsb
fi

# If the gdm user/group don't exist, add them:
if ! grep "^gdm:" etc/group >/dev/null 2>&1; then
  echo "gdm:x:42:" >>etc/group
fi
if ! grep "^gdm:" etc/gshadow >/dev/null 2>&1; then
  echo "gdm:*::" >>etc/gshadow
fi
if ! grep "^gdm:" etc/passwd >/dev/null 2>&1; then
  echo "gdm:x:42:42:gdm:/etc/X11/gdm:/bin/bash" >>etc/passwd
fi
if grep "^gdm:" etc/shadow >/dev/null 2>&1; then
  echo "gdm:*:9797:0:::::" >>etc/shadow
fi

cat << EOF

Note: GDM will start at runlevel 4.  If you would like to have GDM run
when the computer boots, please change your /etc/inittab to default to 
runlevel 4 at boot time. For example, 

# Default runlevel. 
id:4:initdefault:

EOF