pepowlan_watch

pepowlan_watchとはraspberry piの無線LAN又は有線LANの切断検出と回復をさせるものです

o 2015.8.26

o ファーストリリース

o 2015.9.9

o wlan0とeth0の両方の切断検出と回復機能追加

o 2015.9.20

o eth0 ダウン時の回復機能修正

 #!/bin/sh
 # licence GPLv2 ; this scripts designed by Yamauchi.Isamu 2015.8.26 update 2015.9.22
 # ping watch of wlan0 or eth0 fail for rasberry pi
 # pepowlan_watch
 STARTUP=/usr/src/pepolinux/startup.s
 [ ! -e $STARTUP ] && exit
 WORKDIR=/www/remote-hand/tmp
 MSLEEP=300123
 GATEWAY=`cat $STARTUP|awk '/GATEWAY/{gsub("\"","",$1);split($1,I,"=");print I[2]}'`
 [ -z $GATEWAY ] && exit
 PING_HOST=$GATEWAY
 WLAN_YES_NO=`ip link show wlan0 2>&1|awk 'BEGIN{WLAN="YES"};/does not exist/{WLAN="NO"};END{printf WLAN}'`
 ETH0_YES_NO=`ip link show eth0|awk 'BEGIN{ETH0="NO"};/state UP/{ETH0="YES"};END{printf ETH0}'`
 if [ $ETH0_YES_NO = "YES" ];then
   ETH0_IP=`cat $STARTUP|awk '/SET_ETH0/{gsub("\"","",$1);split($1,I,"=");printf I[2]}'`
 fi
 PING_LOG=$WORKDIR/.pepowlan_watch.log
 CMD=$WORKDIR/pepowlan_watch.pepocmd
 cat>$CMD<<END
 #!/bin/sh
 error() {
   [ -e $PING_LOG ] && rm -f $PING_LOG
   exit
 }
 trap error SIGTERM SIGHUP SIGKILL SIGINT
 while true
 do
   date +"%Y/%m/%d %T" > $PING_LOG
   if ! ping -c 1 $PING_HOST 2>&1 >>$PING_LOG; then
     msleep 1000
     if ! ping -c 1 $PING_HOST 2>&1 >> $PING_LOG; then
       if [ $WLAN_YES_NO = "YES" ];then
         ifdown wlan0
         ifup wlan0
       else 
         ifdown eth0
         ifup eth0
             ifconfig eth0 $ETH0_IP
             ip route del default
         ip route add default via $GATEWAY
       fi
     fi
   fi
   msleep $MSLEEP
 done
 END