entrypoint.sh

#!/bin/bash

if [ -n "${PASV_ADDRESS}" ]; then
    sed -i "s/^pasv_address=.*$/pasv_address=${PASV_ADDRESS}/" /etc/vsftpd/vsftpd.conf
fi
if [ -n "${PASV_MIN_PORT}" ]; then
    sed -i "s/^pasv_min_port=.*$/pasv_min_port=${PASV_MIN_PORT}/" /etc/vsftpd/vsftpd.conf
fi
if [ -n "${PASV_MAX_PORT}" ]; then
    sed -i "s/^pasv_max_port=.*$/pasv_max_port=${PASV_MAX_PORT}/" /etc/vsftpd/vsftpd.conf
fi

# add groups
if [ -n "${GROUPS}" ]; then
    IFS=';' read -r -a parsed_groups <<< "${GROUPS}" ; unset IFS
    for group in ${parsed_groups[@]}; do
        IFS=':' read -r -a parsed_group <<< "${group}" ; unset IFS
        groupname=${parsed_group[0]}
        gid=${parsed_group[1]}
        group_exists=`getent group ${groupname} 1>/dev/null 2>/dev/null; echo $?`
        if [ ${group_exists} -ne 0 ]; then
            echo adding group ${groupname}
            addgroup -g ${gid} ${groupname}
        fi
    done
fi

# add users
if [ -n "${USERS}" ]; then
    IFS=';' read -r -a parsed_users <<< "${USERS}" ; unset IFS
    for user in ${parsed_users[@]}; do
        IFS=':' read -r -a parsed_user <<< "${user}" ; unset IFS
		username=${parsed_user[0]}
		password=${parsed_user[1]}
        uid=${parsed_user[2]}
        groupname=${parsed_user[3]}
        user_exists=`getent passwd ${username} 1>/dev/null 2>/dev/null; echo $?`
		if [ ${user_exists} -ne 0 ]; then
            echo adding user ${username}
            adduser ${username} -h /home/${username} -s /bin/sh -u ${uid} -G ${groupname} -D
            echo "${username}:${password}" | chpasswd
        fi
    done
fi

/usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf

tail -f /dev/null