从 bash 脚本访问 ERRORLEVEL
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accessing ERRORLEVEL from bash script
提问by shipshape
I have an application that only works properly when called from a windows command prompt. Something to do with the input/output streams.
我有一个应用程序，只有在从 Windows 命令提示符调用时才能正常工作。与输入/输出流有关。
So I can call it from a bash script by passing it as an argument to cmd.
因此，我可以通过将其作为参数传递给 cmd 来从 bash 脚本中调用它。
cmd /c "badapp"
cmd /c "badapp"
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?
这工作正常 - 但偶尔 badapp 因网络问题而失败 - 我没有得到任何反馈。无论如何要检查 bash 脚本中的 ERRORLEVEl - 或者在运行 bash 脚本的终端上查看 badapp 的输出？
回答by Susam Pal
yes, $?is the variable that contains the error level.
是的，$?是包含错误级别的变量。
Try echo $?for example.
echo $?例如尝试。
An example from Cygwin bash (I'm guessing you are using Cygwin because you are using the Windows cmdin your example.)
Cygwin bash 的一个示例（我猜您正在使用 Cygwin，因为您cmd在示例中使用的是 Windows 。）
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
