sh cleanipc进程间通讯资源释放（清理）Shell脚本

Posted 2021-05-07

#!/bin/bash

#check pramrs num
if (($# != "2"))
then
	echo -e "paramrs error\nuse: $0 [username] [shm|sem|msg|all]"
	exit
elif (($2!="shm" && $2!="sem" && $2!="msg" && $2!="all"))
then
	echo -e "paramrs error\nuse: $0 [username] [shm|sem|msg|all]"
	exit
fi

#delete shm
if (($2=="shm" || $2=="all"))
then
	START=$(ipcs|sed -n '/Shared/=')
	END=$(ipcs|grep -n "^[/s]*$"|awk -F: '{if($1>'"$START"') print $1}'|head -1)
	for i in $(ipcs|sed -n ${START},${END}p|grep $1|awk '{print $2}')
	do
		ipcrm shm $i
		echo "shm: $i"
	done
	echo "delete shm complete."
fi

#delete sem
if (($2=="sem" || $2=="all"))
then
        START=$(ipcs|sed -n '/Semaphore/=')
        END=$(ipcs|grep -n "^[/s]*$"|awk -F: '{if($1>'"$START"') print $1}'|head -1)
        for i in $(ipcs|sed -n ${START},${END}p|grep $1|awk '{print $2}')
        do  
                ipcrm sem $i
                echo "sem: $i"
        done
	echo "delete sem complete."
fi

#delete msg
if (($2=="msg" || $2=="all"))
then
        START=$(ipcs|sed -n '/Message/=')
        END=$(ipcs|grep -n "^[/s]*$"|awk -F: '{if($1>'"$START"') print $1}'|head -1)
        for i in $(ipcs|sed -n ${START},${END}p|grep $1|awk '{print $2}')
        do  
                ipcrm msg $i
                echo "msg: $i"
        done
	echo "delete msg complete."
fi