Bash function to reset SSH_AUTH_SOCK

# This is a mashup of two solutions I found to the problem of connecting old screen sessions to the
# current ssh-agent.
#
# I got the find command from: http://www.tolaris.com/2011/07/12/reconnecting-your-ssh-agent-to-a-detached-gnu-screen-session/
#
# I got the original ssh-reagent function from: http://sweetjesus26.livejournal.com/16782.html

# Find a usable agent
function ssh-reagent () {
  export SSH_AUTH_SOCK=$(find /tmp/ssh-* -user `whoami` -name agent\* -printf '%T@ %p\n' 2>/dev/null | sort -k 1nr | sed 's/^[^ ]* //' | head -n 1)
  if $(ssh-add -l > /dev/null) ; then
    echo Found working SSH Agent:
    ssh-add -l
    return
  fi
  echo Cannot find ssh agent - maybe you should reconnect and forward it?
}