text: #!/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
  
  # MySQL daemon start/stop script.
  
  # Usually this is put in /etc/init.d (at least on machines SYSV R4 based
  # systems) and linked to /etc/rc3.d/S99mysql and /etc/rc0.d/K01mysql.
  # When this is done the mysql server will be started when the machine is
  # started and shut down when the systems goes down.
  
  # Comments to support chkconfig on RedHat Linux
  # chkconfig: 2345 64 36
  # description: A very fast and reliable SQL database engine.
  
  # Comments to support LSB init script conventions
  ### BEGIN INIT INFO
  # Provides: mysql
  # Required-Start: $local_fs $network $remote_fs
  # Should-Start: ypbind nscd ldap ntpd xntpd
  # Required-Stop: $local_fs $network $remote_fs
  # Default-Start:  2 3 4 5
  # Default-Stop: 0 1 6
  # Short-Description: start and stop MySQL
  # Description: MySQL is a very fast and reliable SQL database engine.
  ### END INIT INFO
   
  # If you install MySQL on some other places than /usr/local/mysql, then you
  # have to do one of the following things for this script to work:
  #
  # - Run this script from within the MySQL installation directory
  # - Create a /etc/my.cnf file with the following information:
  #   [mysqld]
  #   basedir=<path-to-mysql-installation-directory>
  # - Add the above to any other configuration file (for example ~/.my.ini)
  #   and copy my_print_defaults to /usr/bin
  # - Add the path to the mysql-installation-directory to the basedir variable
  #   below.
  #
  # If you want to affect other MySQL variables, you should make your changes
  # in the /etc/my.cnf, ~/.my.cnf or other MySQL configuration files.
  
  # If you change base dir, you must also change datadir. These may get
  # overwritten by settings in the MySQL configuration files.
  
  basedir=
  datadir=
  
  # Default value, in seconds, afterwhich the script should timeout waiting
  # for server start. 
  # Value here is overriden by value in my.cnf. 
  # 0 means don't wait at all
  # Negative numbers mean to wait indefinitely
  service_startup_timeout=900
  
  # Lock directory for RedHat / SuSE.
  lockdir='/var/lock/subsys'
  lock_file_path="$lockdir/mysql"
  
  # The following variables are only set for letting mysql.server find things.
  
  # Set some defaults
  mysqld_pid_file_path=
  if test -z "$basedir"
  then
    basedir=/usr/local/mysql
    bindir=/usr/local/mysql/bin
    if test -z "$datadir"
    then
      datadir=/mydata/mysql/data
    fi
    sbindir=/usr/local/mysql/bin
    libexecdir=/usr/local/mysql/bin
  else
    bindir="$basedir/bin"
    if test -z "$datadir"
    then
      datadir="$basedir/data"
    fi
    sbindir="$basedir/sbin"
    libexecdir="$basedir/libexec"
  fi
  
  # datadir_set is used to determine if datadir was set (and so should be
  # *not* set inside of the --basedir= handler.)
  datadir_set=
  
  #
  # Use LSB init script functions for printing messages, if possible
  #
  lsb_functions="/lib/lsb/init-functions"
  if test -f $lsb_functions ; then
    . $lsb_functions
  else
    log_success_msg()
    {
      echo " SUCCESS! $@"
    }
    log_failure_msg()
    {
      echo " ERROR! $@"
    }
  fi
  
  PATH="/sbin:/usr/sbin:/bin:/usr/bin:$basedir/bin"
  export PATH
  
  mode=$1    # start or stop
  
  [ $# -ge 1 ] && shift
  
  
  other_args="$*"   # uncommon, but needed when called from an RPM upgrade action
             # Expected: "--skip-networking --skip-grant-tables"
             # They are not checked here, intentionally, as it is the resposibility
             # of the "spec" file author to give correct arguments only.
  
  case `echo "testing\c"`,`echo -n testing` in
      *c*,-n*) echo_n=   echo_c=     ;;
      *c*,*)   echo_n=-n echo_c=     ;;
      *)       echo_n=   echo_c='\c' ;;
  esac
  
  parse_server_arguments() {
    for arg do
      case "$arg" in
        --basedir=*)  basedir=`echo "$arg" | sed -e 's/^[^=]*=//'`
                      bindir="$basedir/bin"
  		    if test -z "$datadir_set"; then
  		      datadir="$basedir/data"
  		    fi
  		    sbindir="$basedir/sbin"
  		    libexecdir="$basedir/libexec"
          ;;
        --datadir=*)  datadir=`echo "$arg" | sed -e 's/^[^=]*=//'`
  		    datadir_set=1
  	;;
        --pid-file=*) mysqld_pid_file_path=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
        --service-startup-timeout=*) service_startup_timeout=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      esac
    done
  }
  
  wait_for_pid () {
    verb="$1"           # created | removed
    pid="$2"            # process ID of the program operating on the pid-file
    pid_file_path="$3" # path to the PID file.
  
    i=0
    avoid_race_condition="by checking again"
  
    while test $i -ne $service_startup_timeout ; do
  
      case "$verb" in
        'created')
          # wait for a PID-file to pop into existence.
          test -s "$pid_file_path" && i='' && break
          ;;
        'removed')
          # wait for this PID-file to disappear
          test ! -s "$pid_file_path" && i='' && break
          ;;
        *)
          echo "wait_for_pid () usage: wait_for_pid created|removed pid pid_file_path"
          exit 1
          ;;
      esac
  
      # if server isn't running, then pid-file will never be updated
      if test -n "$pid"; then
        if kill -0 "$pid" 2>/dev/null; then
          :  # the server still runs
        else
          # The server may have exited between the last pid-file check and now.  
          if test -n "$avoid_race_condition"; then
            avoid_race_condition=""
            continue  # Check again.
          fi
  
          # there's nothing that will affect the file.
          log_failure_msg "The server quit without updating PID file ($pid_file_path)."
          return 1  # not waiting any more.
        fi
      fi
  
      echo $echo_n ".$echo_c"
      i=`expr $i + 1`
      sleep 1
  
    done
  
    if test -z "$i" ; then
      log_success_msg
      return 0
    else
      log_failure_msg
      return 1
    fi
  }
  
  # Get arguments from the my.cnf file,
  # the only group, which is read from now on is [mysqld]
  if test -x ./bin/my_print_defaults
  then
    print_defaults="./bin/my_print_defaults"
  elif test -x $bindir/my_print_defaults
  then
    print_defaults="$bindir/my_print_defaults"
  elif test -x $bindir/mysql_print_defaults
  then
    print_defaults="$bindir/mysql_print_defaults"
  else
    # Try to find basedir in /etc/my.cnf
    conf=/etc/my.cnf
    print_defaults=
    if test -r $conf
    then
      subpat='^[^=]*basedir[^=]*=\(.*\)$'
      dirs=`sed -e "/$subpat/!d" -e 's//\1/' $conf`
      for d in $dirs
      do
        d=`echo $d | sed -e 's/[ 	]//g'`
        if test -x "$d/bin/my_print_defaults"
        then
          print_defaults="$d/bin/my_print_defaults"
          break
        fi
        if test -x "$d/bin/mysql_print_defaults"
        then
          print_defaults="$d/bin/mysql_print_defaults"
          break
        fi
      done
    fi
  
    # Hope it's in the PATH ... but I doubt it
    test -z "$print_defaults" && print_defaults="my_print_defaults"
  fi
  
  #
  # Read defaults file from 'basedir'.   If there is no defaults file there
  # check if it's in the old (depricated) place (datadir) and read it from there
  #
  
  extra_args=""
  if test -r "$basedir/my.cnf"
  then
    extra_args="-e $basedir/my.cnf"
  else
    if test -r "$datadir/my.cnf"
    then
      extra_args="-e $datadir/my.cnf"
    fi
  fi
  
  parse_server_arguments `$print_defaults $extra_args mysqld server mysql_server mysql.server`
  
  #
  # Set pid file if not given
  #
  if test -z "$mysqld_pid_file_path"
  then
    mysqld_pid_file_path=$datadir/`hostname`.pid
  else
    case "$mysqld_pid_file_path" in
      /* ) ;;
      * )  mysqld_pid_file_path="$datadir/$mysqld_pid_file_path" ;;
    esac
  fi
  
  case "$mode" in
    'start')
      # Start daemon
  
      # Safeguard (relative paths, core dumps..)
      cd $basedir
  
      echo $echo_n "Starting MySQL"
      if test -x $bindir/mysqld_safe
      then
        # Give extra arguments to mysqld with the my.cnf file. This script
        # may be overwritten at next upgrade.
        $bindir/mysqld_safe --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &
        wait_for_pid created "$!" "$mysqld_pid_file_path"; return_value=$?
  
        # Make lock for RedHat / SuSE
        if test -w "$lockdir"
        then
          touch "$lock_file_path"
        fi
  
        exit $return_value
      else
        log_failure_msg "Couldn't find MySQL server ($bindir/mysqld_safe)"
      fi
      ;;
  
    'stop')
      # Stop daemon. We use a signal here to avoid having to know the
      # root password.
  
      if test -s "$mysqld_pid_file_path"
      then
        # signal mysqld_safe that it needs to stop
        touch "$mysqld_pid_file_path.shutdown"
  
        mysqld_pid=`cat "$mysqld_pid_file_path"`
  
        if (kill -0 $mysqld_pid 2>/dev/null)
        then
          echo $echo_n "Shutting down MySQL"
          kill $mysqld_pid
          # mysqld should remove the pid file when it exits, so wait for it.
          wait_for_pid removed "$mysqld_pid" "$mysqld_pid_file_path"; return_value=$?
        else
          log_failure_msg "MySQL server process #$mysqld_pid is not running!"
          rm "$mysqld_pid_file_path"
        fi
  
        # Delete lock for RedHat / SuSE
        if test -f "$lock_file_path"
        then
          rm -f "$lock_file_path"
        fi
        exit $return_value
      else
        log_failure_msg "MySQL server PID file could not be found!"
      fi
      ;;
  
    'restart')
      # Stop the service and regardless of whether it was
      # running or not, start it again.
      if $0 stop  $other_args; then
        $0 start $other_args
      else
        log_failure_msg "Failed to stop running server, so refusing to try to start."
        exit 1
      fi
      ;;
  
    'reload'|'force-reload')
      if test -s "$mysqld_pid_file_path" ; then
        read mysqld_pid <  "$mysqld_pid_file_path"
        kill -HUP $mysqld_pid && log_success_msg "Reloading service MySQL"
        touch "$mysqld_pid_file_path"
      else
        log_failure_msg "MySQL PID file could not be found!"
        exit 1
      fi
      ;;
    'status')
      # First, check to see if pid file exists
      if test -s "$mysqld_pid_file_path" ; then 
        read mysqld_pid < "$mysqld_pid_file_path"
        if kill -0 $mysqld_pid 2>/dev/null ; then 
          log_success_msg "MySQL running ($mysqld_pid)"
          exit 0
        else
          log_failure_msg "MySQL is not running, but PID file exists"
          exit 1
        fi
      else
        # Try to find appropriate mysqld process
        mysqld_pid=`pidof $libexecdir/mysqld`
  
        # test if multiple pids exist
        pid_count=`echo $mysqld_pid | wc -w`
        if test $pid_count -gt 1 ; then
          log_failure_msg "Multiple MySQL running but PID file could not be found ($mysqld_pid)"
          exit 5
        elif test -z $mysqld_pid ; then 
          if test -f "$lock_file_path" ; then 
            log_failure_msg "MySQL is not running, but lock file ($lock_file_path) exists"
            exit 2
          fi 
          log_failure_msg "MySQL is not running"
          exit 3
        else
          log_failure_msg "MySQL is running but PID file could not be found"
          exit 4
        fi
      fi
      ;;
      *)
        # usage
        basename=`basename "$0"`
        echo "Usage: $basename  {start|stop|restart|reload|force-reload|status}  [ MySQL server options ]"
        exit 1
      ;;
  esac
  
  exit 0
  