macos - 修改shell脚本来监控/ping多个ip地址

Question

好吧，所以我需要不断监控多个路由器和计算机，以确保它们保持在线。我找到了一个很棒的脚本here如果无法 ping 通单个 IP，它将通过 growl 通知我(这样我就可以在手机上收到即时通知)。我一直在尝试修改脚本以 ping 多个地址，但运气不佳。当脚本不断监视在线服务器时，我无法弄清楚如何 ping 关闭的服务器。任何帮助将不胜感激。我没有做过太多 shell 脚本编写，所以这对我来说还是很新鲜的。

谢谢

#!/bin/sh

#Growl my Router alive!
#2010 by zionthelion73 [at] gmail . com
#use it for free
#redistribute or modify but keep these comments
#not for commercial purposes

iconpath="/path/to/router/icon/file/internet.png"
# path must be absolute or in "./path" form but relative to growlnotify position
# document icon is used, not document content

# Put the IP address of your router here
localip=192.168.1.1

clear
echo 'Router avaiability notification with Growl'

#variable
avaiable=false

com="################"
#comment prefix for logging porpouse

while true;
do
if $avaiable
then
  echo "$com 1) $localip avaiable $com"
  echo "1"
  while ping -c 1 -t 2 $localip
    do
      sleep 5
    done
  growlnotify  -s -I $iconpath -m "$localip is offline"
  avaiable=false
else
  echo "$com 2) $localip not avaiable $com"
  #try to ping the router untill it come back and notify it
  while !(ping -c 1 -t 2 $localip)
  do
   echo "$com trying.... $com"
   sleep 5
  done

  echo "$com found $localip $com"
  growlnotify -s -I $iconpath -m "$localip is online"
  avaiable=true
fi

sleep 5

done

Answer 1

我认为没有必要运行多个脚本。这是一个通用脚本，用于监视 IP 地址列表并记录 ping 成功的变化...

#!/bin/bash
set 10.0.0.1 10.0.0.2 # etc
trap exit 2
while true; do
  i=1
  for ipnumber in "$@"; do
    statusname=up$i
    laststatus=${!statusname:-0}
    ping -c 1 -t 2 $ipnumber > /dev/null
    ok=$?
    eval $statusname=$ok
    if [ ${!statusname} -ne $laststatus ]; then
      echo status changed for $ipnumber
      if [ $ok -eq 0 ]; then
        echo now it is up
      else
        echo now it is down
      fi
    fi
    i=$(($i + 1))
  done
  sleep 5
done