#!/bin/sh
set -Eeuo pipefail

# Handle the virtual user database when supplied
if [ -f /var/lib/vsftpd/users.txt ]; then
    ## Format of the "users.txt" file :
    #
    #   nicolas:$y$....
    #   john:$y$....
    #
    # Empty lines and comments are allowed
    #
    ## Hashes can be generated with :
    #
    #   mkpasswd --method=yescrypt -s
    #

    umask 0077
    touch /var/lib/vsftpd/users.txt
    rm -f /var/lib/vsftpd/users.db
    sed -r -e 's/^([^:]+):([^:]+)$/store "\1" "\2"/; t r; d; :r s/[\\]/\\\\$/g; s/[$]/\\$/g' < /var/lib/vsftpd/users.txt | gdbmtool --newdb /var/lib/vsftpd/users.db
    umask 0022
fi

exec /usr/sbin/vsftpd -obackground=NO /etc/vsftpd/global.conf /etc/vsftpd/local.conf "$@"