#!/bin/sh

# Echos the current IP address. If you want to see the addresses of all
# interfaces, provide an argument to this script (e.g., "ip all").

IFACE=""

case `uname -s` in
  Darwin|FreeBSD)
    if [ "x$1" = "x" ]; then # $
        IFACE=`netstat -rn | grep default | grep -v :: | cut -c 65-`
    fi
    ;;
  OpenBSD)
    if [ "x$1" = "x" ]; then # $
        IFACE=`netstat -rn | grep default | cut -c 71-`
    fi
    ;;
  SunOS)
    if [ "x$1" = "x" ]; then # $
        IFACE=`netstat -rna | grep 0.0.0.0 | cut -c 63- | head -1`
    fi
    ;;
esac

if [ "x$IFACE" != "x" ]; then # $
    for iface in $IFACE; do
        echo `/sbin/ifconfig $iface | grep inet | grep -v inet6 | awk '{print $2}'` # $
    done
    exit
fi

case `uname -s` in
  Linux)
    if [ "x$1" = "x" ]; then # $
        IFACE=`netstat -rn | grep ^0.0.0.0 | cut -c 74-`
    fi
    echo `/sbin/ifconfig $IFACE | grep inet | grep -v inet6 | awk '{print $2}' | sed -e "s/addr://"`
    ;;
  *)
    echo 'unknown'
    ;;
esac