shell timeout

写脚本的时候，经常需要用到超时控制。看《shell专家编程》时看到一个好例：修改了一下，

1.超过timeout时间还没执行完，则kill进程，发邮件告警:

set-x

mailSend()

{

        mailContent="xxxx Web response time over 5 seconds"

        echo $mailContent | mail -s "xxxxxx Web TimeOut"[e-mail]

}

timeout()

{

        waitfor=3

        command=$*

        $command &

        commandpid=$!

        ( sleep $waitfor ; kill -9 $commandpid  >/dev/null2>&1&& mailSend )&

        watchdog=$!

        sleeppid=$PPID

        wait $commandpid >/dev/null2>&1

        kill $sleeppid >/dev/null2>&1

}

#测试的函数

test123()

{

        sleep 20

}

timeout test123

2.超过timeout时间还没执行完，只发邮件告警，程序正常执行:

mailSend()

{

        mailContent="xxxxe Web response time over 5 seconds,Please have a check !"

        echo $mailContent | mail -s "xxxxx WEB response time over 5 senconds" $mailTo

}

timeout()

{

        waitfor=6

        command=$*

        $command &

        commandpid=$!

        ( sleep $waitfor ;  mailSend )&

        watchdog=$!

        sleeppid=$PPID

        wait $commandpid >/dev/null2>&1

        kill  -9 $watchdog >/dev/null2>&1

        kill $sleeppid >/dev/null2>&1

}