#!/bin/sh
# $Id: ip-up,v 1.2 2005/12/04 23:26:41 brent Exp $
# executed after connecting the ppp interface.

resolv=/etc/resolv.conf
oldHostname=/var/run/oldHostname.$IFNAME
oldHosts=/var/run/oldHosts.$IFNAME

if [ ! -s $resolv -o "`head -1 $resolv`" = "#$IFNAME" ]; then

  unset domain
  
  #if PEERNAME is prefixed with a dot, change our own hostname to it
  if [ -n "$PEERNAME" ]; then

    IFSold=$IFS
    IFS=.
    set $PEERNAME
    IFS=$IFSold
    if [ -z "$1" -a -n "$2" ]; then  #there was a leading dot!
      host=$2
      [ -f $oldHostname ] || hostname >$oldHostname
      if [ $# -gt 2 ]; then
        domain=$3
        shift 3
        for component; do
          domain=$domain.$component
        done
      fi
      hostname $host
    fi
  fi

  if [ "$USEPEERDNS" ]; then

    echo "#$IFNAME" >$resolv
    [ -n "$domain" ] && echo search $domain >>$resolv
    cat /etc/ppp/resolv.conf >>$resolv
    [ -f $oldHosts ] || cp /etc/hosts $oldHosts
    echo "127.0.0.1 localhost" >/etc/hosts #clear any ad hoc DNS

  fi
  
fi