gistfile1.txt

#!/bin/bash
## You need 'flock' from util-linux.

set -eu

SYNERGY_CLIENT='/Applications/Synergy.app/Contents/MacOS/synergyc'
SYNERGY_LOG=${HOME}/.synergy-tunnel.log

SYNERGY_SERVER='ryoichi-ubuntu.aka"
SSH_TUNNEL_OPT="localhost:24800:$SYNERGY_SERVER:24800"

MSG () { echo "$0: $*"; }
DIE () { MSG "ERROR: $*"; }



start_tunnel () {
    MSG "Starting SSH tunneling for Cynergy"
    (
        if flock -n 9
        then
            (
                while true
                do
                    if ping -c 1 -t 1 "$SYNERGY_SERVER"
                    then
                        ssh -N -L "$SSH_TUNNEL_OPT" "$SYNERGY_SERVER" || true
                    else
                        sleep 1
                    fi
                done
            ) &
        else
            MSG "start_tunnel() is already running, skipp starting ssh"
        fi
    ) 9> "$HOME/.synergy-tunnel.lock"
}

start_synergyc () {
    MSG "Starting Synergy Client daemon"
    if flock -n "$HOME/.synergyc.lock" "$SYNERGY_CLIENT" localhost
    then
        :
    else
        MSG "synergyc is already running."
    fi
}


start_tunnel > $SYNERGY_LOG 2>&1
sleep 2
start_synergyc >> $SYNERGY_LOG 2>&1