Applescript 在 ssh 连接之前对每个客户端进行 ping 测试 [英] Applescript to ping test each client prior to ssh connection

问题描述

我正在尝试制作一个连接到本地 ssh 机器列表的 Applescript，每个连接都在一个新的终端窗口中打开.在尝试 ssh 连接之前，我想 ping 客户端以查看它是否可用:如果可用，则运行 ssh 命令，如果不可用，则迭代到下一个客户端.当我运行脚本时，它似乎适用于第一个连接，但随后给了我 -->其余客户端的错误号 -10004(并挂起调试器).任何反馈将不胜感激，谢谢！

I'm trying to make an Applescript that connects to a list local ssh machines, with each connection opening in a new terminal window. Prior to attempting the ssh connection, I'd like to ping the client to see if it's available: if it is, run the ssh command, if not then iterates to the next client. When I run the script it seems to work for the first connection but then gives me --> error number -10004 for the remaining clients (and hangs the debugger). Any feedback would be greatly appreciated, thanks!

set hosts to {"10.2.0.199", "10.2.0.11", "10.2.0.91", "10.2.1.591", "10.2.0.41"}
set uname to {"asus_client01", "asrock_comp", "msi003", "gigabyte4", "intel05client"}
tell application "Terminal"
    activate
    repeat with i from 1 to the count of hosts
        set this_uname to item i of uname --extract individual username
        set this_host to item i of hosts as string --extract iPv4 
        set uname_host to this_uname & "@" & this_host
        set hostUp to true

        try
            do shell script "ping -c 1 -t 5 " & this_host
        on error
            set hostUp to false
            display dialog this_host & " seems to be down."
            delay 2
        end try

        if hostUp then
            do shell script "ssh " & uname_host
        end if
    end repeat
end tell

推荐答案

do shell script 和 do script 是有区别的.不同之处在于 do shell script 是标准脚本添加的一部分，它将打开一个非交互式 shell，执行给定的字符串，然后将 stdout 返回给您，而无需来自其他应用程序(如终端)的任何帮助.do shell script 不应该在任何其他 tell 应用程序块中使用，除了它自己 (me)，因为你违反了一些 AppleScript 安全，你可以在 AppleScript 版本和技术说明中找到.do script 命令是应用程序终端中 AppleScript 命令的一部分.do script 将在目标窗口中输入给定的字符串，并像您自己在终端中输入一样执行该字符串.do script 仅终端应用支持，不能在终端应用之外使用.

There is a difference between do shell script and do script. The difference is that do shell script is part of the standard script addition and will open an non-interactive shell, execute the given string, and return stdout back to you without any help from another application like Terminal. do shell script should never been used in any other tell application block except itself (me) because you violate some AppleScript securities you can find in AppleScript release and technical notes. do script command is part of AppleScript command in the application Terminal. do script will enter the given string in the targeted window and execute that like you have typed in Terminal yourself. do script is only supported by Terminal application and can't be used outside of it.

所以要么做shell脚本:

So it's either do shell script:

do shell script "ping -o stackoverflow.com

或使用终端执行脚本

tell application "Terminal"
    do script "ping -o stackoverflow.com"
end tell

所以整个脚本可能看起来像这样:

So the total script could look something like this:

set hosts to {"10.2.0.199", "10.2.0.11", "10.2.0.91", "10.2.1.591", "10.2.0.41"}
set uname to {"asus_client01", "asrock_comp", "msi003", "gigabyte4", "intel05client"}

--security check: hosts list can't be longer than uname
if (count of hosts) > (count of uname) then return

repeat with i from 1 to count hosts
    repeat 1 times -- simulate continue
        set currentAddress to item i of hosts
        set currentHostname to item i of uname

        if not ((do shell script "ping -o -t 5 " & currentAddress & "&>dev/null && echo yes || echo no") as boolean) then
            exit repeat -- continue
        end if

        tell application "Terminal"
            do script "ssh " & currentHostname
        end tell
    end repeat
end repeat

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