nagios监控脚本如何避免标准输出影响到最终的Status Information

今天在写nagios告警脚本时出现标准输出影响到了最终的Status Information
可恨的是又不能直接把这些标准输出扔/dev/null，因为这个不是一行命令，是expect
具体代码如下：

#!/bin/bash
ip="172.16.3.2"
ip_file="/tmp/hosterhub_leader_ip"
log="/tmp/check_hosterhub.log"
cat /dev/null >$log

/usr/bin/expect <<-EOF
  set timeout 2
  log_file $log
  spawn /home/clouder/vs/script/hosterhub.sh
  send "@quit\r"
  expect eof
EOF

leaderip=$(awk -F "," '/^{leader/{split($1,a,"[:/]");print a[2]}' $log)
echo "${leaderip}" >>${ip_file}

if [ -z $leaderip ];then
  echo "hosterhub leader is not exist"
  exit 2
else
  [ $leaderip != $ip ] && echo "hosterhub leader has changed" && exit 1
  echo "hosterhub leader state is ok"
  exit 0
fi

于是想到用函数来避免这个问题，把整个expect写成函数形式，然后就可以>/dev/null了，我是不是太聪明了。哈哈哈。。

#!/bin/bash
ip="172.16.3.2"
ip_file="/tmp/hosterhub_leader_ip"
log="/tmp/check_hosterhub.log"
cat /dev/null >$log
collectinfo()
{
  /usr/bin/expect <<-EOF
    set timeout 2
    log_file $log
    spawn /home/clouder/vs/script/hosterhub.sh
    send "@quit\r"
    expect eof
EOF
}

collectinfo &>/dev/null
leaderip=$(awk -F "," '/^{leader/{split($1,a,"[:/]");print a[2]}' $log)
echo "${leaderip}" >>${ip_file}

if [ -z $leaderip ];then
  echo "hosterhub leader is not exist"
  exit 2
else
  [ $leaderip != $ip ] && echo "hosterhub leader has changed" && exit 1
  echo "hosterhub leader state is ok"
  exit 0
fi