#!/bin/bash

## SQLDump
## Author: Ze'ev Schurmann
## Reddit: u/thisiszeev

## This script creates a list of all databases in MySQL or MariaDB and then adds to then
## list all the unwanted databases. It then creates a list of unique names which are the
## databases to be backed up. (If you have a root password for MySQL or MariaDB then you
## may need too include it in the code.)

## Place this script in the folder /var/sqldumps

## It's a good idea to run this in as a cron tab. Then you can time a remote backup from
## another server/machine.

## Crontab example: (excluding the ##)

## 0 22    * * *   root    cd /var/sqldumps && bash sqldumps.sh




## Put the names of the databases you do not want to backup in the following array.

ignorelist=("mysql" "performance_schema" "dbispconfig" "phpmyadmin" "roundcube")


## Put the location for the SQL Dumps

dumppath="/var/sqldumps"


## Removes previous SQL dumps and list files.

rm -f *.sql
rm -f *.list


## Creates a list file of all the databases.

mysql -e "show databases" | grep -Ev 'Database|information_schema' > db.list


## Add a list of the unwanted databases to the list file.

for ((n=0; n<${#ignorelist[@]}; n++))
do
  echo ${ignorelist[$n]} >> db.list
done


## Generate a list of the databases to be backed up and pass it line by line
## into a while loop, exporting each database to dbname.sql

sort db.list | uniq -u | while read -r dbname; do
  echo "Dumping $dbname to $dumppath/$dbname.sql"
  mysqldump $dbname > "$dumppath/$dbname.sql"
done

rm db.list