start-ssh-agent.sh

if [ -n "$SSH_AUTH_SOCK" ] && netstat -nlpx 2> /dev/null | awk '{print $NF}' | grep -qF "$SSH_AUTH_SOCK"; then
    echo "export SSH_AUTH_SOCK=$SSH_AUTH_SOCK" > /tmp/ssh-agent$UID
    if [ -n "$SSH_AGENT_PID" ]; then
        echo "export SSH_AGENT_PID=$SSH_AGENT_PID" >> /tmp/ssh-agent$UID
    elif [ -n "$GNOME_KEYRING_PID" ]; then
        echo "export GNOME_KEYRING_SOCKET=$GNOME_KEYRING_SOCKET" >> /tmp/ssh-agent$UID
        echo "export GNOME_KEYRING_PID=$GNOME_KEYRING_PID" >> /tmp/ssh-agent$UID
    fi
else
    SSH_AUTH_SOCK=
    id1=$HOME/.ssh/identity
    id2=$HOME/.ssh/id_dsa
    id3=$HOME/.ssh/id_rsa
    if [ -f $id1 -o -f $id2 -o -f $id3 ]; then
        process=
        if [ -x /usr/bin/ssh-agent ]; then
            [ -f /tmp/ssh-agent$UID ] && source /tmp/ssh-agent$UID > /dev/null
            export GNOME_KEYRING_SOCKET=
            export GNOME_KEYRING_PID=
            if [ -n "$SSH_AGENT_PID" ]; then
                process=$(ps -p "$SSH_AGENT_PID" -o comm= 2> /dev/null)
            fi
            if [ "$process" != "ssh-agent" ]; then
                ssh-agent -s > /tmp/ssh-agent$UID
                source /tmp/ssh-agent$UID
                ssh-add < /dev/null
            fi
        elif which gnome-keyring-daemon > /dev/null 3>&1; then
            [ -f /tmp/ssh-agent$UID ] && source /tmp/ssh-agent$UID > /dev/null
            export SSH_AGENT_PID=
            if [ -n "$GNOME_KEYRING_PID" ]; then
                process=$(ps -p "$GNOME_KEYRING_PID" -o comm= 2> /dev/null)
            fi
            if [ "$process" != "gnome-keyring-daemon" ]; then
                gnome-keyring-daemon --start > /tmp/ssh-agent$UID
                source /tmp/ssh-agent$UID
                export GNOME_KEYRING_SOCKET SSH_AUTH_SOCK GNOME_KEYRING_PID
            fi
        fi
    fi
fi