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bug#32704: Can grep search for a line feed and a null character at the s


From: Eric Blake
Subject: bug#32704: Can grep search for a line feed and a null character at the same time?
Date: Tue, 11 Sep 2018 12:39:54 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.0

On 9/11/18 12:14 PM, Paul Eggert wrote:
On 9/11/18 10:03 AM, Eric Blake wrote:
maybe we really do have a bug - when -z is in effect, I'd expect NUL, rather than newline, to be the byte that separates separate patterns in the pattern argument

You're right, I think it's a bug that grep -zf FILE uses newline separators in FILE. It should use NUL separators.

This cannot be done for NUL bytes in command-line patterns, though, since command-line arguments cannot contain NUL bytes.

Indeed. But that merely means that on the command line, when -z is in effect, you can't specify multiple patterns (but instead have to use -f FILE if that's what you really want). Meanwhile, the effect on being able to match a literal newline would be observable from either the command line or -f FILE.

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org





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