entrypoint.sh

#!/bin/bash

# Crontab configuration
if [ -n "$DCU_CRONTAB_EXECUTION_EXPRESSION" ]; then
    echo "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   Configuring cronjob..."
    echo "$DCU_CRONTAB_EXECUTION_EXPRESSION /opt/dcu/dcu.sh" > /etc/crontabs/root
fi

# Postfix configuration
if [[ "$(postconf -h relayhost)" != "$DCU_MAIL_RELAYHOST" ]]; then
    echo "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   Configuring postfix relayhost to \"$DCU_MAIL_RELAYHOST\"..."
    postconf -e "relayhost = $DCU_MAIL_RELAYHOST"
    
    if pgrep "postfix" > /dev/null; then
        echo -n "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   "
        postfix stop
        echo -n "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   "
        postfix start
    fi
else
    echo "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   Postfix relayhost is already configured to \"$DCU_MAIL_RELAYHOST\""
fi

if ! pgrep "postfix" > /dev/null; then
    echo -n "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   "
    postfix start
fi

# Command line interpreting
if [ -z "$1" ]; then
    echo "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   Starting crond in foreground..."
    echo -n "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   "
    crond -f
elif [ "$1" = "dcu" ] && [ "$2" = "--self-update" ]; then
    echo "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   Waiting for status update..."
    start_time=$(date +%s)
    while [[ ! -f "/opt/dcu/.main_update_process_completed" ]]; do
        now_time=$(date +%s)
        if (( now_time - start_time >= 3600 )); then
            echo "[$(date +%Y/%m/%d\ %H:%M:%S)] ERROR  Timeout reached!"
            echo "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   Exiting..."
            sleep 10
            exit 1
        fi
        sleep 10
    done
    echo "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO   Proceeding with self-update process..."
    echo "[$(date +%Y/%m/%d\ %H:%M:%S)] INFO       Executing \"/opt/dcu/dcu.sh --run $3 $4\"..."
    /opt/dcu/dcu.sh --run $3 $4
fi