从bash脚本访问ERRORLEVEL [英] accessing ERRORLEVEL from bash script

问题描述

我有一个应用程序，只叫从Windows命令提示符时正常工作。是与输入/输出流。

I have an application that only works properly when called from a windows command prompt. Something to do with the input/output streams.

所以我可以从一个bash脚本通过将其作为参数传递给CMD调用它。

So I can call it from a bash script by passing it as an argument to cmd.

CMD / Cbadapp

cmd /c "badapp"

这工作正常 - 但偶尔badapp失败并网的问题 - 我没有得到任何反馈。反正是有检查从bash脚本ERRORLEVEL的 - 或者看到运行bash脚本在终端上从badapp输出？

This works fine - but occasionally badapp fails with network problems - and I get no feedback. Is there anyway to check the ERRORLEVEl from the bash script - or see the output from badapp on the terminal running the bash script?

推荐答案

是 $？是包含错误级别的变量。

yes, $? is the variable that contains the error level.

尝试回声$？例如

从Cygwin的bash的一个例子（我猜你是因为你在你的榜样使用Windows CMD 使用Cygwin。）

An example from Cygwin bash (I'm guessing you are using Cygwin because you are using the Windows cmd in your example.)

susam@nifty /cygdrive/c/Documents and Settings/susam/Desktop
$ cmd /c "badapp"
'badapp' is not recognized as an internal or external command,
operable program or batch file.

susam@nifty/cygdrive/c/Documents and Settings/susam/Desktop
$ if [ $? -eq 0 ]
> then
>   echo "good"
> else
>   echo "bad"
> fi
bad

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