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如何判断当前远程连接类型？（rsh 或 ssh）

发布于 2024-09-16 05:02:03 字数 75 浏览 5 评论 0原文

我想知道是否有一些方法可以找出远程服务器的当前连接类型（rsh 或 ssh？）。环境是Solaris 9、SuSE linux、csh。

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皇甫轩 2024-09-23 05:02:03

您可以使用echo $SSH_CONNECTION;。 SSH 将在远程服务器上设置此环境变量。它包含客户端 IP、客户端端口、服务器 IP 和服务器端口。它应该只针对 SSH 连接进行设置。

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℡Ms空城旧梦 2024-09-23 05:02:03

简短回答：测试“$SSH_CLIENT$SSH2_CLIENT$SSH_TTY”AND谁已连接AND谁是您的父母。

Liquidprompt 项目有一个 (bash/zsh) 函数来执行此操作，看起来像：

    # If this is an SSH connection.
    if [[ -n "$SSH_CLIENT$SSH2_CLIENT$SSH_TTY" ]] ; then
        # This is SSH.
    else
        # Get the host part of the who am i command.
        local sess_src="$(who am i | sed -n 's/.*(\(.*\))/\1/p')"
        # Get the name of the parent process.
        local sess_parent="$(ps -o comm= -p $PPID 2> /dev/null)"
        if [[ -z "$sess_src" && "$sess_src" = *"shepherd" ]] ; then
            # This is a qrsh connection (cf. Grid Engine).
        elif [[ -z "$sess_src" || "$sess_src" = ":"* ]] ; then
            # This is a local connection.
        elif [[ "$sess_parent" = "su" || "$sess_parent" = "sudo" ]] ; then
            # This is a su/sudo
        else
            # This (may be) telnet.
        fi
    fi

Short answer : test "$SSH_CLIENT$SSH2_CLIENT$SSH_TTY" AND who is connected AND who is your parent.

The liquidprompt project has a (bash/zsh) function to do that, which looks like :

    # If this is an SSH connection.
    if [[ -n "$SSH_CLIENT$SSH2_CLIENT$SSH_TTY" ]] ; then
        # This is SSH.
    else
        # Get the host part of the who am i command.
        local sess_src="$(who am i | sed -n 's/.*(\(.*\))/\1/p')"
        # Get the name of the parent process.
        local sess_parent="$(ps -o comm= -p $PPID 2> /dev/null)"
        if [[ -z "$sess_src" && "$sess_src" = *"shepherd" ]] ; then
            # This is a qrsh connection (cf. Grid Engine).
        elif [[ -z "$sess_src" || "$sess_src" = ":"* ]] ; then
            # This is a local connection.
        elif [[ "$sess_parent" = "su" || "$sess_parent" = "sudo" ]] ; then
            # This is a su/sudo
        else
            # This (may be) telnet.
        fi
    fi

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