ssh-find-agent is a tool for locating existing ssh compatible agent processes (e.g., ssh-agent, gpg-agent, gnome-keyring, osx-keychain); and, optionally, setting SSH_AUTH_SOCK accordingly.
ssh-find-agent is written in bash due to it's near ubiquitousness.
Nowhere near done, but this works for now:
. ssh-find-agent.bash; set_ssh_agent_socket
Copyright (C) 2011 by Wayne Walker <[email protected]>