#!/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 daemon 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

trap '' 1 2 3 15			# we shouldn't let anyone kill us

MY_BASEDIR_VERSION=/usr/local
DATADIR=/var/mysql
ledir=/usr/local/libexec

pid_file=$DATADIR/`/bin/hostname -s`.pid
log=$DATADIR/`/bin/hostname -s`.log
err_log=$DATADIR/`/bin/hostname -s`.err

# Parse arguments to see if caller wants the pid_file somewhere else.
for arg
do
  case $arg
    in
    --pid-file=*)
      pid_file=`echo "$arg" | sed -e "s;--pid-file=;;"`
      ;;
    --datadir=*)
      DATADIR=`echo "$arg" | sed -e "s;--datadir=;;"`
      ;;
  esac
done

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

if test -f $pid_file
then
  PID=`cat $pid_file`
  if /bin/kill -0 $PID
  then
    if /bin/ps -uaxww | grep mysqld | grep " $PID " > /dev/null
    then    # The pid contains a mysqld process
      echo "A mysqld process already exists"
      echo "A mysqld process already exists at " `date` >> $err_log
      exit 1;
    fi
  fi
  rm -f $pid_file
  if test -f $pid_file
  then
    echo "Fatal error: Can't remove the pid file: $pid_file"
    echo "Fatal error: Can't remove the pid file: $pid_file at " `date` >> $err_log
    echo "Please remove it manually and start $0 again"
    echo "mysqld daemon not started"
    exit 1;
  fi
fi

#
# Uncomment the following lines if you want all tables to be automaticly
# checked and repaired at start
#
# echo "Checking tables in $DATADIR"
# isamchk --silent --force $DATADIR/*.ISM

echo "Starting mysqld daemon with databases from $DATADIR"

#Default communication ports
#MYSQL_TCP_PORT=3306
if test -z "$MYSQL_UNIX_PORT"
then
  MYSQL_UNIX_PORT="/var/mysql/mysql.sock"
  export MYSQL_UNIX_PORT    
fi
#export MYSQL_TCP_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 "mysqld started on " `date` >> $err_log
while true
do
  rm -f $MYSQL_UNIX_PORT $pid_file	# Some extra safety
  if test "$#" -eq 0
  then
    nohup $ledir/mysqld --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR \
      --user=mysql >> $err_log 2>&1
  else
    nohup $ledir/mysqld --basedir=$MY_BASEDIR_VERSION --datadir=$DATADIR \
      --user=mysql "$@" >> $err_log 2>&1
  fi
  if test ! -f $pid_file		# This is removed if normal shutdown
  then
    break;
  fi
  echo "mysqld restarted on " `date` | tee -a $err_log
done

echo "mysqld ended on " `date` >> $err_log
echo "mysqld daemon ended"
