#!/bin/sh
#----------------------------------------------------------------------------
# /usr/lib/systemd/scripts/mysql-common-mariadb-start - MariaDB Server start post
#
# Creation:     2023-10-03 hbfl
# Last Update:  $Id: mysql-common-tools-connections 106681 2023-10-03 17:22:25Z hbfl
#
# Copyright (c) 2014-@@YEAR@@ Holger Bruenjes, holgerbruenjes(at)gmx(dot)net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#----------------------------------------------------------------------------

# ---------------------------------------------------------------------------
# defaults
# ---------------------------------------------------------------------------
get_defaults()
{
    # default values
    . /srv/mysql/defaults.info
}

# ---------------------------------------------------------------------------
# check status of MariaDB/MySQL Database
# ---------------------------------------------------------------------------
check_status()
{
    if [ -f ${mysql_pid_file} ]
    then
        exit 1
    fi
}

# ---------------------------------------------------------------------------
# check status of MariaDB/MySQL Database
# ---------------------------------------------------------------------------
sanity_checks()
{
    ERR_LOGGER="logger -p daemon.err -t /usr/lib/systemd/system/${package_name}.service -i"
    . /etc/config.d/${package_name}

    # check for buggy options
    if /usr/bin/grep -q ^expire.logs.days /etc/mysql/my${my_path}.cnf  &&
     ! /usr/bin/grep -q ^log.bin /etc/mysql/my${my_path}.cnf
    then
        echo "ERROR: Using expire_logs_days without log_bin crashes the server." | $ERR_LOGGER
        exit 1
    fi

    # check for diskspace shortage
    if LC_ALL=C BLOCKSIZE= /usr/bin/df --portability "${mysql_datadir:-/srv/mysql/${my_path}}"  |
                           /usr/bin/tail -n 1 |
                           /usr/bin/awk '{ exit ($4>4096) }'
    then
        echo "ERROR: The partition with "${mysql_datadir:-/srv/mysql/${my_path}}" is too full!" | $ERR_LOGGER
        exit 1
    fi
}

# ---------------------------------------------------------------------------
# wait if create/remove pid files
# ---------------------------------------------------------------------------
wait_for_pid()
{
    for COUNT in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
    do
        case "$1" in
        'created')
            test -s ${mysql_pid_file} && break
            ;;
        'removed')
            test ! -s ${mysql_pid_file} && break
            ;;
        esac
        sleep 1
#        echo -n '.'
    done
}

# ---------------------------------------------------------------------------
# start mariadb
# ---------------------------------------------------------------------------
start_mariadb()
{
    if [ -f /etc/sysconfig/${package_name} ]
    then
        . /etc/sysconfig/${package_name}
    fi

    /usr/lib/mysql/${my_path}/bin/${db_mysqld} --defaults-file=/etc/mysql/my${my_path}.cnf --user=mysql $MYSQL_OPTION  &

    wait_for_pid 'created'
}

# ---------------------------------------------------------------------------
# check status of MariaDB/MySQL Database
# ---------------------------------------------------------------------------
set_default_sock()
{
    if [ ${mysql_port:-0} = 3306 ]
    then
        cd /run/mysql
        /usr/bin/ln -sf ${my_path}/mysql.sock
    fi
}

# ---------------------------------------------------------------------------
# main
# ---------------------------------------------------------------------------
main()
{
    package_name="${1}"
    project_name=$(echo "${package_name}" | tr [:lower:] [:upper:])
    my_path=$(echo "${package_name}" | sed 's|[^[:digit:]]||g')

    get_defaults
    check_status
    sanity_checks
    start_mariadb
    set_default_sock

    exit 0
}

# ---------------------------------------------------------------------------
# call function main
# ---------------------------------------------------------------------------
main "${@}"

# ---------------------------------------------------------------------------
# end
# ---------------------------------------------------------------------------