shell - Shell：无法从 ssh 连接获取返回值

Question

我有一个脚本 test_server_conn.sh 和两个服务器，即 Serv1 和 Serv2。尝试从 Serv1 执行脚本并与 Serv2 建立 ssh 连接。检查文件是否存在，然后返回一个值。

test_server_conn.sh

#!/usr/bin/env bash


test_file(){
     echo "Establishing ssh connection with Serv2."
     sshpass -p pswd ssh uid@serv2

     retval=""
     FILE=/etc/docker
     if [ -d "$FILE" ]; 
     then
       echo "$FILE is a directory."
       retval=0
     else
       echo "Check and try again. Closing the connection from Serv2."
       retval=1
     fi
     return "${retval}"
}

echo "Execution started from Serv1..."
test_file
retval=$?

if [ "${retval}" -eq 0 ];
then
  echo "Directory is ready"
else
  echo "Directory is not ready."
fi

脚本执行但未能停止执行。

Actual results：

Execution started from Serv1...
Establishing ssh connection with Serv2.
<nothing after this and the curser keeps blinking>
               

Expected results：

Execution started from Serv1...
Establishing ssh connection with Serv2.
Directory is ready/ Directory is not ready.

不明白为什么这不返回任何东西并进入挂起状态？如何从 ssh 连接返回值而不会遇到任何问题？

标签： shellemailunixsh