shell脚本超时控制
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 -xmailSend(){ mailContent="xxxx Web response time over 5 seconds" echo $mailContent | mail -s "xxxxxx Web TimeOut" xxxxx@xxx.cion}timeout(){ waitfor=3 command=$* $command & commandpid=$!
( sleep $waitfor ; kill -9 $commandpid> /dev/null 2>&1 && mailSend ) &
watchdog=$! sleeppid=$PPID wait $commandpid > /dev/null 2>&1
kill $sleeppid > /dev/null 2>&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/null 2>&1 kill-9 $watchdog > /dev/null 2>&1 kill $sleeppid > /dev/null 2>&1}
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