#!/bin/bash

# This program will start a new ssh SOCKS tunnel to allow you to use
# another server as a secure proxy.
PORT=3333
USER=gmethvin
HOST=unix.andrew.cmu.edu
# use these settings if using tsocks
# /etc/tsocks.conf:
#   server = 127.0.0.1
#   server_port = $PORT

# use a pidfile so we can kill the process later
PIDFILE=$HOME/.proxify.pid

# kill any existing process
if [ -f $PIDFILE ]; then
    PID=$(cat $PIDFILE)
    if [ -e /proc/${PID} ]; then
        kill $PID
    fi
    rm $PIDFILE
fi

# unless we got the -k flag, start up the proxy

if [ "$1" == "-k" ]; then
    exit 0
fi

COMMAND="ssh -fND ${PORT} ${USER}@${HOST}"

$COMMAND || exit 1

PID=$(ps x | grep "$COMMAND" | awk '{ print $1 }' | head -1)

echo $PID > $PIDFILE