管道命令的输出发球又节约命令退出code [英] Piping command output to tee but also save exit code of command

问题描述

我有一个shell脚本中，我换一个命令（MVN全新安装），将输出到日志文件重定向。

I have a shell script in which I wrap a command (mvn clean install), to redirect the output to a logfile.

#!/bin/bash
...
mvn clean install $@ | tee $logfile
echo $? # Does not show the return code of mvn clean install

现在，如果 MVN全新安装失败，出现错误，我想我的包装的shell脚本也会失败与错误。但是因为我管道全部输出到三通，我无法访问 MVN返回code干净安装，所以当我访问 $ ？之后，它始终为0（因为发球成功）。

Now if mvn clean install fails with an error, I want my wrapper shell script also fail with that error. But since I'm piping all the output to tee, I cannot access the return code of mvn clean install, so when I access $? afterwards, it's always 0 (since tee successes).

我试图让命令写入错误输出到一个单独的文件，并检查之后，但MVN的错误输出始终是空的（好像它只是写入stdout）。

I tried letting the command write the error output to a separate file and checking that afterwards, but the error output of mvn is always empty (seems like it only writes to stdout).

我如何preserve MVN返回code干净的安装但还是输出管道到一个日志文件？

How can I preserve the return code of mvn clean install but still piping the output to a logfile?

推荐答案

既然你正在运行庆典，您可以使用它的$PIPESTATUS 变量代替 $ ：

Since you're running bash, you can use its $PIPESTATUS variable instead of $?:

mvn clean install $@ | tee $logfile
echo ${PIPESTATUS[0]}

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