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#!/bin/ksh
# Refresh the dserver SSH key cache from user authorized_keys files.
# OpenBSD variant: called from the dserver rc.d rc_pre (because /var/run is
# wiped by /etc/rc at boot) and from a daily /etc/daily.local entry added by
# the Rex 'dtail' task — see the pkgrepo skill's dtail-package.md.
CACHEDIR=/var/run/dserver/cache
DSERVER_USER=_dserver
DSERVER_GROUP=_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:$DSERVER_GROUP" "$cachefile"
chmod 600 "$cachefile"
fi
done
# Remove stale cache entries for users whose authorized_keys no longer exist
find "$CACHEDIR" -name '*.authorized_keys' -type f | while read cachefile; do
remoteuser=$(basename "$cachefile" .authorized_keys)
if [ ! -f "/home/$remoteuser/.ssh/authorized_keys" ]; then
echo "Deleting obsolete cache file $cachefile"
rm "$cachefile"
fi
done
echo 'All set...'
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