如果使用三通，如何检查出口? [英] How to check exit if used tee?

问题描述

我尝试使用 tee 将输出保存在如下文件中:

I try to use tee to save output in file like:

myapp | tee log.txt

但是我在检查退出时遇到了问题.之前的代码:

But I have a problem with checking of exit. Previous code:

myapp 
if [ $? -eq 0 ] 
then .....

但是$?将是发球台的出口！是否有可能捕获 myapp 的退出?谢谢.

But $? will be exit of tee! Does it possible catch exit of myapp? Thanks.

推荐答案

对于 bash，有一个方便的特殊数组:PIPESTATUS.myapp 的返回码将在 ${PIPESTATUS[0]} 中，以此类推.

For bash, there's a convenient special array: PIPESTATUS. The return code for myapp would be in ${PIPESTATUS[0]} and so on.

zsh 有一个大致相同的方法.

zsh has a roughly identical method.

在严格的 bourne shell 中还有一种更烦人、更笨拙的方法，您可以在 comp.unix.shell 常见问题解答.

There's also a rather more annoying, hacky way to do it in strict bourne shells that you can read about in the comp.unix.shell FAQ.

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