Is there any bash one-liner that would allow me to break binary data coming from a pipe into lines?

As an example:

$ echo -ne 'x31x00x32rnx33x34x35x00rn' | xxd 

This results in:

00000000: 3100 320d 0a33 3435 000d 0a              1.2..345...

And I would like to have:

00000000: 3100 320d 0a                             1.2..
00000005: 3334 3500 0d0a                           345...

In case the binary data contains a new line, I don't mind the message will be split in two or more lines (this will rarely happen in my case).

I have many devices in the field and having to send scripts or programs to do this would be cumbersome. The messages have variable size so xxd -c would just work for some messages.

我尝试将消息通过管道传输到read，这正确地将消息分成几行。但是由于某种原因（可能是 bash 本身），我的消息中删除了零：

echo -ne 'x31x00x32rnx33x34x35x00rn' | while read; do echo "$REPLY" | xxd; done

00000000: 3132 0d0a                                12..
00000000: 3334 350d 0a                             345..

（编辑：字节偏移量可以全部为零，这不是问题。最后一个示例中的问题是数据部分中缺少零。）

也许有一种方法可以在使用时保持零read？或者我的用例太麻烦了？

回答

$ printf 'x31x00x32rnx33x34x35x00rn' | 
    perl -nE 'printf "%08d: ", $c;  say unpack("H*", "$_") ; $c += length'
00000000: 3100320d0a
00000005: 333435000d0a