#!/bin/sh
# Start/stop/restart mysqld.
#
# Copyright 2003  Patrick J. Volkerding, Concord, CA
# Copyright 2003  Slackware Linux, Inc., Concord, CA
# Copyright 2008, 2013  Patrick J. Volkerding, Sebeka, MN, USA
#
# This program comes with NO WARRANTY, to the extent permitted by law.
# You may redistribute copies of this program under the terms of the
# GNU General Public License.

# To start MariaDB automatically at boot, be sure this script is executable:
# chmod 755 /etc/rc.d/rc.mysqld

# Before you can run MariaDB, you must have a database.  To install an initial
# database, do this as root:
#
#   mysql_install_db --user=mysql
#
# Note that the mysql user must exist in /etc/passwd, and the created files
# will be owned by this dedicated user.  This is important, or else mysql
# (which runs as user "mysql") will not be able to write to the database
# later (this can be fixed with 'chown -R mysql.mysql /var/lib/mysql').
#
# To increase system security, consider using "mysql_secure_installation"
# as well.  For more information on this tool, please read:
#   man mysql_secure_installation

# To allow outside connections to the database comment out the next line.
# If you don't need incoming network connections, then leave the line
# uncommented to improve system security.
SKIP="--skip-networking"

# Uncomment the next line to use Oracle's InnoDB plugin instead of the included XtraDB
#INNODB="--ignore-builtin-innodb --plugin-load=innodb=ha_innodb.so"

# Uncomment the next line to use TokuDB
#TOKUDB="--plugin-load=ha_tokudb"

# Start mysqld:
mysqld_start() {
  if [ -x /bin/mysqld_safe ]; then
    # If there is an old PID file (no mysqld running), clean it up:
    if [ -r /var/run/mysql/mysql.pid ]; then
      if ! ps axc | grep mysqld 1> /dev/null 2> /dev/null ; then
        echo "Cleaning up old /var/run/mysql/mysql.pid."
        rm -f /var/run/mysql/mysql.pid
      fi
    fi

    if ! [ -z "$TOKUDB" ]; then
      echo "never" > /sys/kernel/mm/transparent_hugepage/enabled
      echo "never" > /sys/kernel/mm/transparent_hugepage/defrag
    fi

    /bin/mysqld_safe --datadir=/var/lib/mysql --pid-file=/var/run/mysql/mysql.pid $SKIP $INNODB $TOKUDB &
  fi
}

# Stop mysqld:
mysqld_stop() {
  # If there is no PID file, ignore this request...
  if [ -r /var/run/mysql/mysql.pid ]; then
    killall mysqld
    # Wait at least one minute for it to exit, as we don't know how big the DB is...
    for second in 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 \
      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 60 ; do
      if [ ! -r /var/run/mysql/mysql.pid ]; then
        break;
      fi
      sleep 1
    done
    if [ "$second" = "60" ]; then
      echo "WARNING:  Gave up waiting for mysqld to exit!"
      sleep 15
    fi
    if ! [ -z "$TOKUDB" ]; then
        echo "always" > /sys/kernel/mm/transparent_hugepage/enabled
        echo "always" > /sys/kernel/mm/transparent_hugepage/defrag
    fi
  fi
}

# Restart mysqld:
mysqld_restart() {
  mysqld_stop
  mysqld_start
}

case "$1" in
'start')
  mysqld_start
  ;;
'stop')
  mysqld_stop
  ;;
'restart')
  mysqld_restart
  ;;
*)
  echo "usage $0 start|stop|restart"
esac
