linux 错误流传入管道的几种方式

int32位 posted @ Aug 22, 2013 02:34:20 PM in linux , 3312 阅读
转载请注明：http://krystism.is-programmer.com/若有错误，请多多指正，谢谢！

正常情况下当运行命令： command1 | command2 时，只能把command1标准输出传入command2 输入，即只能将标准流传入管道，但有时我们需要将错误流传入管道，就比较麻烦了。有以下解决方案：

  1. command1 2>&1 | command2 ，这样可以把错误流重定向到标准输入流，然后在传入管道。这样的问题是标准流和错误流混在一起了，这可能不是我们所需要的。
  2. 在bash、tcsh中直接支持将错误流传入管道，即 command1 |& command2，这样方法最方便，但不是所有shell都能够支持的。
  3. 先把错误流文件保存到临时文件中，在读取，然后重定向，即 command1 2>tmpfile && cat tmpfile | command2，这种方式健壮性比较好，但同时效率肯定比较低的。

当然或许有其他更好的方式，目前仅想到这几种方式。

转载请注明：http://krystism.is-programmer.com/若有错误，请多多指正，谢谢！
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