什么是差异错误退出值？ [英] What are the error exit values for diff?

问题描述

在差异手册页，我发现这些出口值：

On the diff man-page I've found these exit values:

    0     No differences were found. 
    1     Differences were found.
   >1     An error occurred.

是否有上述1不同的退出值不同的错误？

Are there different exit values above 1 for different errors?

推荐答案

这取决于你的差异命令。矿（GNU diffutils的3.0）说：

It depends on your diff command. Mine (GNU diffutils 3.0) says:

0 的退出状态都表示没有发现差异， 1 表示一些
  差异被发现，而 2 意味着麻烦。通常情况下，不同的
  二进制文件算作麻烦，但是这可以通过使用改变
   -a 或 - 文本选项，或 -q 或 - 简短选项

An exit status of 0 means no differences were found, 1 means some differences were found, and 2 means trouble. Normally, differing binary files count as trouble, but this can be altered by using the -a or --text option, or the -q or --brief option.

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