#!/bin/sh

# prints out the name of the kiosk user to log in as;
# e.g., if $DISPLAY is "kiosk07.dnalounge.net:0.0", then
# the user will be "guest07".
#
# In /etc/X11/gdm/gdm.conf use:
# AutomaticLogin=/usr/local/sbin/kioskname|
# TimedLogin=/usr/local/sbin/kioskname|

# Kludge for debugging on the primary console.
if ( echo $DISPLAY | grep '^:0\(\.0\)*$' >/dev/null 2>/dev/null ) ; then
 echo guest07
 exit 0
fi

# handle IP addresses in $DISPLAY, like 172.28.4.65:6
#
NN=`echo $DISPLAY | sed -n 's/^[0-9.]*\.\([0-9]*\):[0-9]*$/\1/p'`
if [ "x$NN" != "x" ]; then
  NN=`echo $NN - 64 | bc | sed 's/^\([0-9]\)$/0\1/'`
  echo "guest$NN"
  exit 0
fi

if ! ( echo $DISPLAY | grep '^kiosk[0-9]' >/dev/null 2>/dev/null ) ; then
 echo "$0: bogus DISPLAY: $DISPLAY" >&2
 exit 1
fi

echo $DISPLAY | sed -e 's/:.*//' -e 's/\..*//' -e 's/kiosk/guest/'