cups/overlay/usr/local/bin/entrypoint

#!/usr/bin/env sh

# shellcheck disable=SC3040

set -eo pipefail

# Function to handle SIGTERM
terminate() {
    echo "Received SIGTERM, shutting down CUPS..."
    kill -TERM "$child" 2>/dev/null
    wait "$child"
    exit 0
}

# Set up SIGTERM trap
trap terminate TERM

if [ -n "$CUPS_ADMIN_USERNAME" ] && [ -n "$CUPS_ADMIN_PASSWORD" ]; then
    if ! id -u "$CUPS_ADMIN_USERNAME" >/dev/null 2>&1; then
        echo "Creating user $CUPS_ADMIN_USERNAME..."
        adduser -S -H -G lpadmin "$CUPS_ADMIN_USERNAME"
        echo "$CUPS_ADMIN_USERNAME:$CUPS_ADMIN_PASSWORD" | chpasswd 2>/dev/null
    fi
fi

# Start CUPS in the background and get its PID
/usr/sbin/cupsd -f -c /cups/conf/cupsd.conf -s /cups/conf/cups-files.conf &
child=$!

# Wait for the CUPS process
wait "$child"