今天自己写的一个小shell - blog.lei - powered by phpwind.net

导读：
　　#!/bin/bash
　　# 20070427 make by lei
　　case "$1" in
　　"start")
　　/etc/rc.d/init.d/mysqld strat ;;
　　"stop")
　　/etc/rc.d/init.d/mysqld stop ;;
　　"restart")
　　/etc/rc.d/init.d/mysqld restart ;;
　　esac
　　exit 0
　　感觉还是语法不熟
　　其实找到mysqld把它copy出来也是一样得,最终还得利用系统的那个mysqld文件进行操作
　　其实原始脚本如下:
　　#!/bin/bash
　　#
　　# mysqld This shell script takes care of starting and stopping
　　# the MySQL subsystem (mysqld).
　　#
　　# chkconfig: - 64 36
　　# description: MySQL database server.
　　# processname: mysqld
　　# config: /etc/my.cnf
　　# pidfile: /var/run/mysqld/mysqld.pid
　　# Source function library.
　　. /etc/rc.d/init.d/functions
　　# Source networking configuration.
　　. /etc/sysconfig/network
　　prog="MySQL"
　　# extract value of a MySQL option from /etc/my.cnf
　　# Usage: get_mysql_option FILE VARNAME DEFAULT
　　# result is returned in $result
　　# Ugly as this is, it knows nothing of option file sections ...
　　get_mysql_option(){
　　result=`sed -n "s/^[ /t]*$2[ /t]*=[ /t]*//p" "$1" 2>/dev/null | tail -n 1`
　　if [ -z "$result" ]; then
　　# not found, use default
　　result="$3"
　　else
　　# found, still have to deal with quoting and end-of-line comments
　　dequoted=`echo "$result" | sed "s/^'/([^']*/)'.*$//1/"`
　　if [ x"$dequoted" != x"$result" ]; then
　　result="$dequoted"
　　else
　　dequoted=`echo "$result" | sed 's/^"/([^"]*/)".*$//1/'`
　　if [ x"$dequoted" != x"$result" ]; then
　　result="$dequoted"
　　else
　　result=`echo "$result" | sed 's/^/([^ /t#]*/).*$//1/'`
　　fi
　　fi
　　fi
　　}
　　get_mysql_option /etc/my.cnf datadir "/var/lib/mysql"
　　datadir="$result"
　　get_mysql_option /etc/my.cnf socket "$datadir/mysql.sock"
　　socketfile="$result"
　　get_mysql_option /etc/my.cnf log-error "/var/log/mysqld.log"
　　errlogfile="$result"
　　get_mysql_option /etc/my.cnf pid-file "/var/run/mysqld/mysqld.pid"
　　mypidfile="$result"
　　start(){
　　touch "$errlogfile"
　　chown mysql:mysql "$errlogfile"
　　chmod 0640 "$errlogfile"
　　[ -x /sbin/restorecon ] &&/sbin/restorecon "$errlogfile"
　　if [ ! -d "$datadir/mysql" ] ;then
　　action $"Initializing MySQL database: "/usr/bin/mysql_install_db
　　ret=$?
　　chown -R mysql:mysql "$datadir"
　　if [ $ret -ne 0 ] ;then
　　return $ret
　　fi
　　fi
　　chown -R mysql:mysql "$datadir"
　　chmod 0755 "$datadir"
　　# The reason for explicitly specifying --pid-file is that there may
　　# be no such entry in my.cnf, and the default behavior will be to not
　　# create it at all. Likewise, we specify --log-error in case there
　　# was not an entry in my.cnf.
　　/usr/bin/mysqld_safe --defaults-file=/etc/my.cnf --pid-file="$mypidfile" --log-error="$errlogfile" >/dev/null 2>&1 &
　　ret=$?
　　# Spin for a maximum of N seconds waiting for the server to come up.
　　# Rather than assuming we know a valid username, accept an "access
　　# denied" response as meaning the server is functioning.
　　if [ $ret -eq 0 ]; then
　　STARTTIMEOUT=30
　　while [ $STARTTIMEOUT -gt 0 ]; do
　　RESPONSE=`/usr/bin/mysqladmin -uUNKNOWN_MYSQL_USER ping 2>&1` &&break
　　echo "$RESPONSE" | grep -q "Access denied for user" &&break
　　sleep 1
　　let STARTTIMEOUT=${STARTTIMEOUT}-1
　　done
　　if [ $STARTTIMEOUT -eq 0 ]; then
　　echo "Timeout error occurred trying to start MySQL Daemon."
　　action $"Starting $prog: "/bin/false
　　else
　　action $"Starting $prog: "/bin/true
　　fi
　　else
　　action $"Starting $prog: "/bin/false
　　fi
　　[ $ret -eq 0 ] &&touch /var/lock/subsys/mysqld
　　return $ret
　　}
　　stop(){
　　MYSQLPID=`cat "$mypidfile" 2>/dev/null `
　　if [ -n "$MYSQLPID" ]; then
　　/bin/kill "$MYSQLPID" >/dev/null 2>&1
　　ret=$?
　　if [ $ret -eq 0 ]; then
　　STOPTIMEOUT=60
　　while [ $STOPTIMEOUT -gt 0 ]; do
　　/bin/kill -0 "$MYSQLPID" >/dev/null 2>&1 || break
　　sleep 1
　　let STOPTIMEOUT=${STOPTIMEOUT}-1
　　done
　　if [ $STOPTIMEOUT -eq 0 ]; then
　　echo "Timeout error occurred trying to stop MySQL Daemon."
　　ret=1
　　action $"Stopping $prog: "/bin/false
　　else
　　rm -f /var/lock/subsys/mysqld
　　rm -f "$socketfile"
　　action $"Stopping $prog: "/bin/true
　　fi
　　else
　　action $"Stopping $prog: "/bin/false
　　fi
　　else
　　ret=1
　　action $"Stopping $prog: "/bin/false
　　fi
　　return $ret
　　}
　　restart(){
　　stop
　　start
　　}
　　condrestart(){
　　[ -e /var/lock/subsys/mysqld ] &&restart || :
　　}
　　# See how we were called.
　　case "$1" in
　　start)
　　start
　　;;
　　stop)
　　stop
　　;;
　　status)
　　status mysqld
　　;;
　　restart)
　　restart
　　;;
　　condrestart)
　　condrestart
　　;;
　　*)
　　echo $"Usage: $0 {start|stop|status|condrestart|restart}"
　　exit 1
　　esac
　　exit $?

本文转自
http://218.85.131.36:8032/blog/article.php?itemid-83-type-blog.html