vsftpd virtual user based on MySql authentication

yum -y install mariadb-server
systemctl enable --now mariadb.service

mysql -e "CREATE DATABASE vsftpd;USE vsftpd;
CREATE TABLE users (id INT AUTO_INCREMENT NOT NULL PRIMARY KEY,
name CHAR(50) BINARY NOT NULL,
password CHAR(48) BINARY NOT NULL);
INSERT INTO users(name,password) values('qiu',password('123456'));
INSERT INTO users(name,password) values('zhang',password('654321'));"
mysql -e "select * from vsftpd.users;"

mysql -e "create user vsftpd@'192.168.31.%' identified by 'Pana#123';"
mysql -e "grant all on vsftpd.* to vsftpd@'192.168.31.%';"

yum install -y vsftpd

yum -y install vsftpd gcc gcc-c++ make mariadb-devel pam-devel
wget http://prdownloads.sourceforge.net/pam-mysql/pam_mysql-0.7RC1.tar.gz
tar xf pam_mysql-0.7RC1.tar.gz
cd pam_mysql-0.7RC1/
./configure --with-pam-mods-dir=/lib64/security 
make install

cat > /etc/pam.d/vsftpd.mysql<<EOF
auth required pam_mysql.so user=vsftpd passwd=Pana#123 host=mysqlserver db=vsftpd table=users usercolumn=name passwdcolumn=password crypt=2
account required pam_mysql.so user=vsftpd passwd=Pana#123 host=mysqlserver db=vsftpd table=users usercolumn=name passwdcolumn=password crypt=2
EOF

mkdir -pv /data/ftproot/upload
useradd -d /data/ftproot -s /sbin/nologin -r vuser
setfacl -mu:vuser:rwx /data/ftproot/upload

mkdir /etc/vsftpd/conf.d/
sed -Eri "s#(pam_service_name=vsftpd)#\1.mysql#" /etc/vsftpd/vsftpd.conf
echo "guest_enable=YES" >> /etc/vsftpd/vsftpd.conf
echo "guest_username=vuser" >> /etc/vsftpd/vsftpd.conf

systemctl enable --now vsftpd