我可能误解了这个问题，但是您的程序永远不会参见管道字符|.

I may have misunderstood the question, but your program won't ever see the pipe character, |.

shell处理整个命令行，可以这么说，您的程序只会获得其在命令行中的份额.

The shell processes the entire command line, and your program will only be given it's share of the command line, so to speak.

示例:

cat file1 file2 | sed s/frog/bat/

在上面的示例中，仅使用两个参数file1和file2调用cat.另外，sed仅用一个参数调用:s/frog/bat/.

In the above example, cat is invoked with only two arguments, file1, and file2. Also, sed is invoked with only a single argument: s/frog/bat/.