尝试SSH时设备不正确的ioctl [英] Inappropriate ioctl for device when trying to SSH

问题描述

我正在尝试SSH少量服务器，并尝试获取每个服务器的 sudo -l <​​/code>输出.

I'm trying to SSH few servers and trying to get sudo -l output of each server.

下面是我正在执行的脚本

Below is the script I'm executing

#!/bin/bash
serverlist="/tmp/servers"

while IFS=, read -r server netgroup username user
do
        ssh -tt -q root@$server sudo -U $username -l < /dev/null
done < "$serverlist"

我发现此脚本中的 -tt 选项是导致此错误的原因.有什么想法吗?

I have found that -tt option in this script as the cause of this error. Any thought on this?

我还注意到当我仅对1台服务器执行以下命令时，我没有看到此错误.

Also i have noted that I don't see this error when i execute below command just for 1 server.

ssh -tt -q root @ myserver sudo -U cham01 -l <​​/code>

ssh -tt -q root@myserver sudo -U cham01 -l

以下是我收到的完整错误消息: tcgetattr:设备的不适当的ioctl

Below is the complete error message I'am getting: tcgetattr: Inappropriate ioctl for device

推荐答案

tcgetattr:设备的不适当的ioctl 通常意味着某些程序试图执行终端控制操作，但是它的标准I/O流未连接到终端.(我知道这一点是因为 tcgetattr 是C的名称库函数执行终端控制操作.)

tcgetattr: Inappropriate ioctl for device normally means that some program attempted to do a terminal control operation but its standard I/O streams weren't connected to a terminal. (I know this because tcgetattr is the name of a C library function that does terminal control operations.)

现在， -tt 选项到 ssh 的全部目的是确保在远程主机上运行的程序已连接到一个终端，然后 stty 打印出 speed 38400波特；行= 0;-brkint -imaxbel 证明它是.这是我在 my 服务器上运行以下命令时得到的:

Now, the whole point of the -tt option to ssh is to guarantee that the program run on the remote host is connected to a terminal, and stty printing out speed 38400 baud; line = 0; -brkint -imaxbel demonstrates that it was. This is what I get when I run these commands with my servers:

$ ssh myserver stty < /dev/null
stty: 'standard input': Inappropriate ioctl for device

$ ssh -tt myserver stty < /dev/null
speed 38400 baud; line = 0;
-brkint -imaxbel
Connection to myserver closed.

但是你得到的是

$ ssh -tt yourserver stty < /dev/null
tcsetattr: Inappropriate ioctl for device
speed 38400 baud; line = 0;
-brkint -imaxbel

tcsetattr 错误不是来自 stty 的 .首先，某些尝试执行与终端相关的操作的操作失败了，然后然后 stty 成功运行.这表明您的Shell启动脚本中存在一个错误，该错误在非交互式"运行时做了不适当的事情，即使您正在运行 ，也会导致您得到此错误连接到终端的命令.我无能为力，但是

The tcsetattr error is not coming from stty. First something tried to do something terminal-related and failed, and then stty ran successfully. This suggests a bug in your shell startup scripts, which are doing something that is inappropriate when run "non-interactively", causing you to get this error even though you are running commands connected to a terminal. I can't help you any further, but perhaps this old answer about a similar problem offers some clues.

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