# hook addon DHCLIENT
# necessary dhcp-client package


# some network stuff
touch $DESTDIR/etc/hosts.allow
touch $DESTDIR/etc/hosts.deny
cpifexists /etc/host.conf        /etc/
cpifexists /etc/nsswitch.conf    /etc/

# put DNS server
dns1=$(grep ^nameserver /etc/resolv.conf 2>/dev/null | grep -v "127.0.0.1" | head -1 | awk '{print $2}')
echo "TCOS_DNS_SERVER=${dns1}" >> ${DESTDIR}/conf/tcos.conf

if [ ! -f /sbin/dhclient ]; then
 echo "ERROR"
 echo ""
 echo "NO DHCP support, please install dhcp-client package."
 echo "  => apt-get install dhcp-client (or)"
 echo "  => apt-get install dhcp3-client"
 echo ""
 # critical error FIXME clean tmp files !!!!
 killall gentcos

elif [ -f /sbin/dhclient3 ]; then

 #_echo ""
 #_echo "    WARNING: dhcp3-client package support is very bad,"
 #_echo "             please use dhcp-client instead"
 #_echo ""
 # exit 1


 copydir /etc/dhcp3                /etc/
 cpifexists /sbin/dhclient         /sbin/
 cat << EOF > $DESTDIR/sbin/dhclient-script
#!/bin/sh

if [ -f /tmp/dhclient-script.done ]; then
  exit 0
fi


# we have some env vars apply it
#
# \${interface} should be network iface (ex: eth0)
# \${new_ip_address} IP address of dhcp response
# \${new_subnet_mask} netmask
# \{new_routers} gateway
#

for varpar in \$(env); do
  varname=\$(echo \$varpar| awk -F'=' '{print \$1}')
  varvalue=\$(echo \$varpar| awk -F'=' '{print \$2}')
  if [ "\$varname" = "new_ip_address" ]; then
    IP=\$varvalue
  fi
  if [ "\$varname" = "interface" ]; then
    INTERFACE=\$varvalue
  fi
  if [ "\$varname" = "new_subnet_mask" ]; then
    NETMASK=\$varvalue
  fi
  if [ "\$varname" = "new_routers" ]; then
    GATEWAY=\$varvalue
  fi
done

# test if we have all needed variables
if [ \$INTERFACE ] && [ \$IP ] && [ \$NETMASK ] && [ \$GATEWAY ] ; then
   ifconfig \${INTERFACE} \${IP} netmask \${NETMASK} up
   route add default dev \${INTERFACE} gw \${GATEWAY}
   # create a file to not configure network again
   touch /tmp/dhclient-script.done
fi

EOF
 chmod +x $DESTDIR/sbin/dhclient-script

 mkdir -p $DESTDIR/var/lib/dhcp3 $DESTDIR/lib/dhcp3-client
 touch $DESTDIR/lib/dhcp3-client/call-dhclient-script

 # dhclient3 need dhcp user 
 dhcp_user=$(grep -c "dhcp:" /etc/passwd )

 if [ $dhcp_user -gt 0 ]; then
  grep "dhcp:" /etc/passwd >> $DESTDIR/etc/passwd
  grep "dhcp:" /etc/group >> $DESTDIR/etc/group
  grep "dhcp:" /etc/shadow >> $DESTDIR/etc/shadow
  
 # # adjust owner and suids
  chmod 4755 $DESTDIR/lib/dhcp3-client/call-dhclient-script
  chown root:dhcp $DESTDIR/lib/dhcp3-client/call-dhclient-script
 fi
 

elif [ -x /sbin/dhclient ]; then
 # dhcp and network stuff
 cpifexists /sbin/dhclient     /sbin/
 mkdir -p $DESTDIR/var/lib/dhcp/
 cpifexists /etc/dhclient-script   /etc/
 cpifexists /etc/dhclient.conf     /etc/

else
  _echo ""
  _echo "    ERROR:"
  _echo "            No dhcp-client package detected"
  _echo "            Please install dhcp-client package"
  _echo "            thin clients don't work without dhcp-client package"
  _echo ""
  exit 1

fi