寫(xiě)腳本的時(shí)候，經(jīng)常需要用到超時(shí)控制。看《shell專家編程》時(shí)看到一個(gè)好例：修改了一下，

1.超過(guò)timeout時(shí)間還沒(méi)執(zhí)行完，則kill進(jìn)程，發(fā)郵件告警:

?

set-x
mailSend()
{
??????? 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/null2>&1&& mailSend )&

??????? watchdog=$!
??????? sleeppid=$PPID
??????? wait $commandpid >/dev/null2>&1

??????? kill $sleeppid >/dev/null2>&1
}

#測(cè)試的函數(shù)

test123()
{
??????? sleep 20
}

timeout test123

2.超過(guò)timeout時(shí)間還沒(méi)執(zhí)行完，只發(fā)郵件告警，程序正常執(zhí)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
}

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