#!/usr/bin/perl
########################################################################## mysql/mariadb user manager (mwx'2021)
use DBI;
use Getopt::Std;getopts('hd:x');

$VERSION='4.0.0';

&help() if ($ARGV[0]=~/^\s*$/ || $opt_h);

$USER=$DB=$ARGV[0];
$DB=$opt_d if ($opt_d!~/^\s*$/);

$PW=sprintf("$USER%03d",int(rand(100000)));

my $dsn = "DBI:mysql:mysql;mysql_read_default_file=$ENV{HOME}/.my.cnf"; 
$dbh=DBI->connect($dsn,undef,undef,{PrintError=>1});

&sqldo("CREATE DATABASE IF NOT EXISTS $DB") if (!$opt_x);
&sqldo("DROP USER IF EXISTS '$USER'");
&sqldo("CREATE USER '$USER' IDENTIFIED BY '$PW'");
&sqldo("GRANT ALL PRIVILEGES ON $DB.* TO '$USER'");

sub sqldo() {
  my($sql)=@_;
  print "$sql\n";
  $dbh->do($sql);
}

sub help() {
print <<"ENDOFHELP";

myuser - mariadb user manager (v$VERSION)

myuser <NAME>               add user and database with the same name to mariadb
myuser -d <DBNAME> <NAME>   add user and database to mariadb
myuser -x <NAME>            add only user to mariadb

ENDOFHELP
exit();
}

############################################################################################################ END