GNU bug report logs - #32704
Can grep search for a line feed and a null character at the same time?

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From: 21naown <at> gmail.com
To: 32704 <at> debbugs.gnu.org, Eric Blake <eblake <at> redhat.com>, Paul Eggert <eggert <at> cs.ucla.edu>
Subject: bug#32704: Can grep search for a line feed and a null character at the same time?
Date: Sat, 15 Sep 2018 18:43:44 +0200

Thank you for your messages.

It is possible I did not understand correctly your messages, because 
grep finds hex sequences with the “-Pa” options at least.

Examples—“input.txt” contains, from the file system, for example 
“\xFF\xFE\x0D\x00\x0A\x00\x74\x00\x65\x00\x73\x00\x74\x00\x0D\x00\x0A\x00\x74\x00\x65\x00\x73\x00\x74\x00\x5F\x00\x74\x00\x77\x00\x6F\x00\x0D\x00\x0A\x00”:
grep -Pa '\x00' input.txt
→ found
grep -Pza '\x0A' input.txt
→ found
grep -Pa '\x0A\x00' input.txt
grep -Pza '\x0A\x00' input.txt
→ not found for the both

But is it at least possible to find “\x0A\x00” with grep?

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