#!/bin/sh
# Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
# This file is public domain and comes with NO WARRANTY of any kind
#
# scripts to start the MySQL demon and restart it if it dies unexpectedly
#
# This should be executed in the MySQL base directory if you are using a
# binary installation that has other paths than you are using.
#
# mysql.server works by first doing a cd to the base directory and from there
# executing safe_mysqld

# Check if we are starting this relative (for the binary release)
if test -f ./data/mysql/db.frm -a -f ./share/mysql/english/errmsg.sys -a \
 -x ./bin/mysqld
then
  MY_BASEDIR_VERSION=`pwd`		# Where bin, share and data is
  DATADIR=$MY_BASEDIR_VERSION/data	# Where the databases are
  ledir=$MY_BASEDIR_VERSION/bin		# Where mysqld are
# Check if this is a 'moved install directory'
elif test -f ./var/mysql/db.frm -a -f ./share/mysql/english/errmsg.sys -a \
 -x ./libexec/mysqld
then
  MY_BASEDIR_VERSION=`pwd`		# Where libexec, share and var is
  DATADIR=$MY_BASEDIR_VERSION/var	# Where the databases are
  ledir=$MY_BASEDIR_VERSION/libexec	# Where mysqld are
else
  MY_BASEDIR_VERSION=/usr
  DATADIR=/var/lib/mysql
  ledir=/usr/lib/mysql
fi

pidfile=/var/run/mysqld.pid
log=/var/log/mysql.log

#
# If there exists an old pid file, check if the demon is already running
# Note: The switches to 'ps' may depend on your operating system

if test -f $pidfile
then
  PID=`cat $pidfile`
  if /bin/kill -s 0 $PID
  then
    if /bin/ps -p $PID | grep mysqld > /dev/null
    then    # The pid contains a mysqld process
      echo "A mysqld process already exists"
      exit 0;
    fi
  fi
  if rm -f $pidfile
  then
    echo "Fatal error: Can't remove the pid file: $pidfile"
    echo "mysqld demon not started"
  fi
fi

echo "Starting mysqld demon with databases from $DATADIR"

#Default communication ports
#MYSQL_TCP_PORT=3306
MYSQL_UNIX_PORT="/tmp/mysql.sock"
#export MYSQL_TCP_PORT MYSQL_UNIX_PORT

# Does this work on all systems?
#if type ulimit | grep "shell builtin" > /dev/null
#then
#  ulimit -n 256 > /dev/null 2>&1		# Fix for BSD and FreeBSD systems
#fi

echo -n "mysqld started on " >> $log
date >> $log
while true
do
  rm -f $MYSQL_UNIX_PORT $pidfile	# Some extra safety
  if test "$#" -eq 0
  then
    $ledir/mysqld --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR \
     --skip-locking >> $log 2>&1
  else
    $ledir/mysqld --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR \
     --skip-locking "$@" >> $log 2>&1
  fi
  if test ! -f $pidfile			# This is removed if normal shutdown
  then
    break;
  fi
  echo "mysqld restarted" >> $log
  echo "mysqld restarted"
done

echo -n "mysqld ended on " >> $log
date >> $log
echo "" >> $log
echo "mysqld demon ended"
