#!/bin/sh
# $Id: xutmp,v 1.2 2009/04/07 21:50:11 friedman Exp $

ttyname()
{
  tty=`tty 2> /dev/null | sed -e 's=^/dev/=='`
  case $tty in
    'not a tty' ) tty=`readlink /proc/self/fd/0 | sed -e 's/[][]//g'` ;;
  esac
  echo $tty
}

call_sessreg()
{
  case $1 in
    on )  cmd=-a ;;
    off ) cmd=-d ;;
  esac

  tty=`ttyname`
  exec sessreg $cmd -w none -l "$tty" -h "${DISPLAY-$tty}" "${LOGNAME-$USER}"
}

call_utempter()
{
  case $1 in
    on )  exec $utempter add "${DISPLAY-`ttyname`}" ;;
    off ) exec $utempter del ;;
  esac
}

main()
{
  case $1 in
    on | off ) : ;;
    * ) echo "Usage: xutmp [on|off]" 1>&2; exit 1 ;;
  esac

  fn=call_sessreg
  utempter=/usr/libexec/utempter/utempter
  if [ -x $utempter ]; then
    fn=call_utempter
  fi

  $fn $1
}

main "$@"

# eof