#!/bin/bash

declare -r CACHEDIR=/var/run/dserver/cache
declare -r DSERVER_USER=dserver

echo "Updating SSH key cache"

ls /home/ | while read remoteuser; do
    keysfile=/home/$remoteuser/.ssh/authorized_keys

    if [ -f $keysfile ]; then
        cachefile=$CACHEDIR/$remoteuser.authorized_keys
        echo "Caching $keysfile -> $cachefile"

        cp $keysfile $cachefile
        chown $DSERVER_USER $cachefile
        chmod 600 $cachefile
    fi
done

# Cleanup obsolete public SSH keys
find $CACHEDIR -name \*.authorized_keys -type f |
while read cachefile; do
    remoteuser=$(basename $cachefile | cut -d. -f1)
    keysfile=/home/$remoteuser/.ssh/authorized_keys

    if [ ! -f $keysfile ]; then
        echo "Deleting obsolete cache file $cachefile"
        rm $cachefile
    fi
done

echo "All set..."