telnet.sh

嵌入式linux双机热备份倒换处理代码

#!/bin/sh

NC=/bin/nc
SH=/bin/sh
RM=/bin/rm
KILL=/bin/kill
DOWN="0"
CAT=/bin/cat
if [ -f ./telnet.ok ]; then
	$RM ./telnet.ok
fi
$CAT ./telnet.conf | while read i
do
	IP=`echo $i | cut -d" " -f1`
	PORT=`echo $i | cut -d" " -f2`
	Q=`echo $i | cut -d"\"" -f2`
	R=`echo $i | cut -d"\"" -f4`
	E=`echo $i | cut -d"\"" -f6`
	if [ "$IP" != "" ]; then 
		COMPT=20
		while [ "$COMPT" != "0" ]; do
			RES=`$SH -c "echo -e \"$Q\n$E\n\" | $NC $IP $PORT 2>/dev/null"`
			expr match "$RES" "$R" 2>&1 > /dev/null 
			if [ $? -eq 0 ]; then
				COMPT="0"
			else 
				RES="down"
				COMPT=$[$COMPT-1]
			fi
			sleep 1
		done
		if [ "$RES" == "down" ]; then
			DOWN="1"
			TPID=`ps a | grep "$NC $IP $PORT" | grep -v grep | grep -v $SH | cut -d" " -f1`
			if [ "$TPID" != "" ]; then
				$KILL $TPID
			fi
		fi
		if [ -f ./telnet.ok ]; then
			$RM ./telnet.ok
		fi
	fi
	if [ "$DOWN" == "1" ]; then
		echo "$IP port $PORT" > ./telnet.ok
		exit
	else 
		echo "up" > ./telnet.ok
	fi
done
if [ -f ./telnet.ok ]; then
	RET=`$CAT ./telnet.ok`
	if [ "$RET" == "up" ]; then
		$RM ./telnet.ok
		exit 0
	else
		$RM ./telnet.ok
		echo "telnet.sh => Warning ! $RET doesn't respond !" >> /var/log/ha-log
		exit 1
	fi
fi