AppleScript ping shell 脚本总是 returns 真

Question

我正在尝试让这个 AppleScript 在主机打开或离线时提醒我。如果我将 do shell script 行更改为 set connected to true/false，一切正常，所以我知道其余代码有效。但是 do shell script 行似乎总是 return 正确。当我运行它在终端中时它工作正常，但由于某种原因在 AppleScript 中它没有。即使我将主机设置为随机 IP 地址，每次在终端中 returns false，do shell script returns true 每次。我从 this 答案中得到了 shell 脚本。

on run
    set oldconnected to false
    repeat
        set connected to do shell script "ping -o -t 5 My-Host.local >/dev/null && echo yes || echo no" as boolean

        if connected and not oldconnected then
            display notification "Device has connected"
        end if

        if not connected and oldconnected then
            display notification "Device has disconnected"
        end if

        set oldconnected to connected
        delay 5
    end repeat
end run

Answer 1

您在 do 调用周围遗漏了一些括号。替换：

set connected to do shell script "ping -o -t 5 My-Host.local >/dev/null && echo yes || echo no" as boolean

与：

set connected to (do shell script "ping -o -t 5 My-Host.local >/dev/null && echo yes || echo no") as boolean

你应该可以开始了！

AppleScript ping shell 脚本总是 returns 真

AppleScript ping shell script always returns true

bash

shell

applescript