#!/bin/sh
# ssh-agent-kill - kill ssh-agent processes, FIFOs, and cached process info
# Andrew Ho (andrew@zeuscat.com)
#
# Usage: eval `ssh-agent-kill`
# Also see ssh-agent-persist.
#
# See http://www.zeuscat.com/andrew/software/desktop_hacks/#ssh-agent-persist
# for some background information about how I use this script.

ME=`basename "$0"`

if [ "x$USER" = "x" ]; then    
    USER="$USERNAME"           
    if [ "x$USER" = "x" ]; then    
        USER="$LOGNAME"            
        if [ "x$USER" = "x" ]; then
            echo "echo '$ME: could not determine username' 2>&1"
            exit 1
        fi
    fi
fi

if [ "x$HOME" = "x" ]; then
    echo "echo '$ME: could not determine home directory' 2>&1"
    exit 1
fi

SSH_AGENT_ROOT="$HOME/.ssh-agent"
ssh_agent_pids=`ps -ef \
    | grep "$USER" | grep ssh-agent | grep -v grep | grep -v "$ME" \
    | awk '{ print $2 }'`

if [ "x$ssh_agent_pids" != "x" ]; then
    echo "echo 'Killing ssh-agent pids: $ssh_agent_pids';"
    kill -9 $ssh_agent_pids
fi

if [ -d "/tmp/ssh-$USER" ]; then
    echo "echo 'Removing ssh-agent FIFOs in /tmp/ssh-$USER';"
    rm -rf "/tmp/ssh-$USER"
fi

HOSTNAME=`hostname`
if [ "x$HOSTNAME" = "x" ]; then
    echo "echo '$ME: could not determine hostname' 2>&1;"
    HOSTNAME=unknown
else
    case "$HOSTNAME" in
        *.tellme.com) ;;
        *) HOSTNAME="$HOSTNAME.tellme.com" ;;
    esac
fi

filename="$SSH_AGENT_ROOT/$HOSTNAME"
if [ -f "$filename" ]; then
    echo "echo 'Removing ssh-agent state: $filename';"
    rm "$filename"
fi

if [ "x$SSH_AUTH_SOCK" != "x" ]; then
    echo "unset SSH_AUTH_SOCK;"
fi

if [ "x$SSH_AGENT_PID" != "x" ]; then
    echo "unset SSH_AGENT_PID;"
fi

exit 0