MySQL启动脚本改装，支持多配置文件

相信很多童鞋都不止维护一个MySQL实例，MySQL自带的启动脚本不太好使，所以改装了一下，把指定的配置文件名传入即可

使用示例：

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Usage: mysqld  {start|stop|restart|reload|force-reload|status} [ config name. "my.cnf" example "my" ( default my) ]  [ MySQL server options ]    /etc/init.d/mysqld start my_3307 /etc/init.d/mysqld stop my_3307

 只要把mysql的配置文件名作为参数传入即可，配置文件名的后辍支持 .cnf和.cfg
修改MySQL的安装目录所在位置，如果安装在/usr/local/mysql的话，不用修改

mysqld文件第46行

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basedir= 修改为： basedir= "你的MySQL根目录"

 在第48行加入默认配置文件

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config_file= '/etc/my.cnf'

 查找“mode=$1”
在下一行加入

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server=$2

 在[ $# -ge 1 ] && shift的上一行加入，这个不能少了，否则会把传进来的第二个参数作为mysqld自身参数，会出错。

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[ $ # -ge 2 ] && shift && shift

 在任何位置加入下面的函数，注意：不要在函数内加。
该函数作用是查找mysql的配置文件位置，可以根据自己的需求加入

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get_cnf_file() {      cfg_name=$1      if [ -n $cfg_name ];then          cfg_file= "/etc/$cfg_name.cnf"          cfg_file2= "/etc/$cfg_name.cfg"          cfg_file3= "$basedir/$cfg_name.cnf"          cfg_file4= "$basedir/$cfg_name.cfg"          cfg_file5= "$basedir/etc/$cfg_name.cnf"          cfg_file6= "$basedir/etc/$cfg_name.cfg"          if [ -f $cfg_file ];then              config_file=$cfg_file          elif [ -f $cfg_file2 ];then              config_file=$cfg_file2          elif [ -f $cfg_file3 ];then              config_file=$cfg_file3          elif [ -f $cfg_file4 ];then              config_file=$cfg_file4          elif [ -f $cfg_file5 ];then              config_file=$cfg_file5          elif [ -f $cfg_file6 ];then              config_file=$cfg_file6          fi      fi }

 查找“parse_server_arguments"的函数调用，在之前加入

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if [ -n $server ] then      get_cnf_file $server      extra_args= "-c $config_file"      lock_file_path= "$lockdir/$server" fi

 最后，在 "start" 分支里修改

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$bindir/mysqld_safe --datadir= "$datadir" --pid-file= "$mysqld_pid_file_path" $other_args >/dev/ null 2>&1 & 为： if [ -n $server ];then     $bindir/mysqld_safe --defaults-file= "$config_file" --pid-file= "$mysqld_pid_file_path" $other_args >/dev/ null 2>&1 & else     $bindir/mysqld_safe --datadir= "$datadir" --pid-file= "$mysqld_pid_file_path" $other_args >/dev/ null 2>&1 & fi

修改后 完整mysqld脚本代码 (红色的是被改过

#!/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
####################
##  Modify by skyoo61@gmail.com
##  2012-03-26
####################
# 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=
config_file='/etc/my.cnf'

# 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=/data/mysql
  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
server=$2    # default my, config file name not suffix, default suffix ".cnf"

[ $# -ge 2 ] && shift && shift
[ $# -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/^[^=]*=//'` ;;
      --port=*) port=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      --log-error=*) log_error_path=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      --server-id=*) server_id=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
      --socket=*) socket=`echo "$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_cnf_file() {
    cfg_name=$1
    if [ -n $cfg_name ];then
        cfg_file="/etc/$cfg_name.cnf"
        cfg_file2="/etc/$cfg_name.cfg"
        cfg_file3="$basedir/$cfg_name.cnf"
        cfg_file4="$basedir/$cfg_name.cfg"
        cfg_file5="$basedir/etc/$cfg_name.cnf"
        cfg_file6="$basedir/etc/$cfg_name.cfg"
        if [ -f $cfg_file ];then
            config_file=$cfg_file
        elif [ -f $cfg_file2 ];then
            config_file=$cfg_file2
        elif [ -f $cfg_file3 ];then
            config_file=$cfg_file3
        elif [ -f $cfg_file4 ];then
            config_file=$cfg_file4
        elif [ -f $cfg_file5 ];then
            config_file=$cfg_file5
        elif [ -f $cfg_file6 ];then
            config_file=$cfg_file6
        fi
    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

if [ -n $server ]
then
    get_cnf_file $server
    extra_args="-c $config_file"
    lock_file_path="$lockdir/$server"
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.
      if [ -n $server ];then
      $bindir/mysqld_safe --defaults-file="$config_file" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &
      else
      $bindir/mysqld_safe --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &
      fi
      wait_for_pid created "$!" "$mysqld_pid_file_path"; return_value=$?

      # 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 "$mysqld_pid_file_path"
    then
      mysqld_pid=`cat "$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`
      if 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} [ config name. \"my.cnf\" example \"my\" (default my) ]  [ MySQL server options ]"
      exit 1
    ;;
esac

exit 0

转自：http://www.cnblogs.com/skyoo/archive/2012/03/28/2421532.html