alex-environ/home/scripts/ssh_agent_setup

#!/bin/sh


SSH_ENV=$HOME/.ssh/environment.`hostname`

start_agent ()
{
        # If not running interactively, don't do anything else
        [[ $- != *i* ]] && return

        if [ `uname -o` = "Cygwin" ]
        then
                echo "Connecting to ssh-pageant..."
                eval $(/usr/bin/ssh-pageant -r -a "/tmp/.ssh-pageant-$USERNAME")
        else
                ssh-agent > ${SSH_ENV}
                chmod 600 ${SSH_ENV}
                . ${SSH_ENV} > /dev/null
                echo "Created a new ssh-agent $SSH_AGENT_PID"
        fi

}

load_keys ()
{
        if [ "$alex_load_keys" == "1" ]
        then
                ssh-add
        fi
}

# Source SSH settings, if applicable
# If a ssh auth socket exists at this point, it must be from a forwarded agent.
if [ -n "${SSH_AUTH_SOCK+set}" ] && [[ ${SSH_AUTH_SOCK} != *"com.apple.launchd"* ]]
then
        if [ -f "${SSH_ENV}" ]
        then
                AUTH_SOCK=$SSH_AUTH_SOCK
                . ${SSH_ENV} > /dev/null
                kill -9 $SSH_AGENT_PID
                pkill -9 -u $USER ssh-agent
                rm $SSH_ENV
                unset SSH_AGENT_PID
                unset SSH_ENV
                SSH_AUTH_SOCK=$AUTH_SOCK
                export SSH_AUTH_SOCK
        fi
        echo "Connected to forwarded SSH agent ${SSH_AUTH_SOCK}."
        echo "The following keys are available:"
        ssh-add -l
else
        if [ -f "${SSH_ENV}" ]
        then
                . ${SSH_ENV} > /dev/null
                ssh-add -L > /dev/null 2>&1
                case $? in
                        0) echo "Connected to existing ssh-agent $SSH_AGENT_PID."
                                echo "The following keys are available:"
                                ssh-add -l
                                ;;
                        1) echo "Connected to existing ssh-agent $SSH_AGENT_PID. No keys were found in the agent."
                                load_keys
                                ;;
                        2) start_agent
                                load_keys
                                ;;
                esac
        else
                start_agent
                load_keys
        fi
fi