!/bin/bash

chkconfig: 2345 64 36

description: MySQL startup

Author:oldboy

Blog:http://oldboy.blog.51cto.com

Time:2017-07-07 09:24:34

Name:mysqld

Version:V1.0

Description:This is a test script.

[ -f /etc/init.d/functions ] && source /etc/init.d/functions
bindir="/application/mysql/bin"
datadir="/application/mysql/data"
mysqld_pid_file_path="/application/mysql/hostname.pid"
PATH="/sbin:/usr/sbin:/bin:/usr/bin:$basedir/bin" #此步对开机启动及定时启动及其关键。
export PATH
return_value=0

Lock directory.

lockdir='/var/lock/subsys'
lock_file_path="$lockdir/mysql"

log_success_msg(){
echo " SUCCESS! @"
}

Start Func

start(){
# Start daemon
echo "Starting MySQL"
if test -x bindir/mysqld_safe --datadir="mysqld_pid_file_path" >/dev/null &
return_value=$? # 是否处理好返回值是区别脚本是否专业规范的关键。
sleep 2

    # Make lock for CentOS
    if test -w "$lockdir"   # 锁目录是否可写。
    then
        touch "$lock_file_path"  # 创建锁文件。
    fi
    exit $return_value
else
    log_failure_msg "Couldn't find MySQL server ($bindir/mysqld_safe)"
fi

}

Stop Func

stop(){
if test -s "mysqld_pid_file_path"`

    if (kill -0 $mysqld_pid 2>/dev/null) # 检查PID对应的进程是否存在。
    then
        echo "Shutting down MySQL"
        kill $mysqld_pid  # 不能带-9，否则后果自负。
        return_value=$?
        sleep 2
    else
        log_failure_msg "MySQL server process #$mysqld_pid is not running!"
        rm -f "$mysqld_pid_file_path"
    fi
    # Delete lock for Oldboy's CentOS
    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

}
case "0 stop; then
$0 start
else
log_failure_msg "Failed to stop running server, so refusing to try to start."
exit 1
fi
;;

*)
    echo "Usage: $0  {start|stop|restart}"
    exit 1

esac
exit $return_value #是否处理好返回值是区别脚本是否专业规范的关键。