Linux shell定时器

网上找了个例子,简单实用如下. 可以有一个后台进程,在timer超时采取一些操作.

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#!/bin/ksh #Delaytime=0 AlarmHandler() { echo "Get SIGALAM" KillSubProcs exit 14 } KillSubProcs() { #kill cbm echo "it's time out,kill cbm here" if [ $? -eq 0 ];then echo "Sub-processes killed." fi }   SetTimer() { Delaytime=$1 echo $Delaytime if [ $Delaytime  -ne 0 ];then sleep $Delaytime  && kill -s 14 $$ & #CHPROCIDS="$CHPROCIDS $!" TIMERPROC=$! fi } UnsetTimer() { echo "Start to unset timer" kill $TIMERPROC }   trap AlarmHandler 14 SetTimer 30 #CHPROCIDS="$CHPROCIDS $!" #wait $! sleep 40 UnsetTimer echo "ALL Done." exit 0