bash OpenConnect 自动连接/重新连接脚本？
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OpenConnect autoconnect/reconnect script?
提问by Andrius
I have this script:
我有这个脚本：
#!bin/bash
NAME="user"
PIDFILE="openconnect.pid"
CERT="user.crt"
KEY="user.key"
PASS="pass"
HOST="https://example.com"
SCRIPT="/etc/vpnc/vpnc-script"
openconnect -b --script $SCRIPT --pid-file=$PIDFILE -c $CERT -k $KEY --key-password=$PASS --user=$NAME $HOST
It works, but sometimes if something goes wrong (restart of server, or some other issues), it disconnects from VPN. And I need to rerun script again. Is there some way I could modify it or add it in cron job or some other way?
它可以工作，但有时如果出现问题（服务器重启或其他一些问题），它会与 VPN 断开连接。我需要再次重新运行脚本。有什么方法可以修改它或将其添加到 cron 作业或其他方式中吗？
Note. When I run this script I need to enter certificate password. So considering security, I'm wondering where I should keep that password for autoreconnect purposes?
注意。当我运行这个脚本时，我需要输入证书密码。因此，考虑到安全性，我想知道为了自动重新连接的目的，我应该在哪里保存该密码？
回答by dawez
You can detect if openconnect is still running by checking its PID:
您可以通过检查其PID来检测 openconnect 是否仍在运行：
pidof openconnect
pidof openconnect
This return an exit value of 0 if openconnect still runs otherwise non zero.
如果 openconnect 仍然运行，则返回退出值 0，否则非零。
You would have a script that looks like that [not tested but should give you a hint]:
你会有一个看起来像这样的脚本 [未经测试但应该给你一个提示]：
#!/bin/bash
OPENCONNECT_PID=""
function checkOpenconnect(){
ps -p "${OPENCONNECT_PID}"
# print the status so we can check in the main loop
echo $?
}
function startOpenConnect(){
# start here open connect with your params and grab its pid
openconnect [your params] & OPENCONNECT_PID=$!
}
startOpenConnect
while true
do
# sleep a bit of time
sleep 30
OPENCONNECT_STATUS=$(checkOpenconnect)
[ $OPENCONNECT_STATUS -ne 0 ] && startOpenConnect
done
