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#!/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! [email protected]" # 注意函数的缩进，下同，也是专业的表现，可放到functions里。
}
log_failure_msg(){
echo " ERROR! [email protected]"
}
# Start Func
start(){
# Start daemon
echo "Starting MySQL"
if test -x $bindir/mysqld_safe # 启动文件是否可执行。
then
$bindir/mysqld_safe --datadir="$datadir" --pid-file="$mysqld_pid_file_path" >/dev/null &
return_value=$? # 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 "$mysqld_pid_file_path" # 是否PID文件存在并大小大于0。
then
mysqld_pid=`cat "$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 "$1" in
start)
start
;;
stop)
stop
;;
restart)
if $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。
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