0k-charms/rsync-backup-target/build/entrypoint.sh

#!/bin/bash


##
## code
##

chmod 440 /etc/sudoers.d/* -R

KEYS=/etc/rsync/keys
RSYNC_HOME=/var/lib/rsync

mkdir -p "$RSYNC_HOME/.ssh"

for f in "$KEYS"/*.pub; do
    [ -e "$f" ] || continue
    content=$(cat "$f")
    ident="${f##*/}"
    ident="${ident%.pub}"
    if ! [[ "$ident" =~ ^[a-zA-Z0-9._-]+$ ]]; then
        echo "bad: '$ident'"
        continue
    fi
    echo "command=\"/usr/local/sbin/ssh-cmd-validate \\\"$ident\\\"\",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty $content"
done > "$RSYNC_HOME"/.ssh/authorized_keys
chown rsync:rsync -R "$RSYNC_HOME"/.ssh -R

## Give back PID 1 so that ssh can receive signals
exec /usr/sbin/sshd -D