Rob Robason wrote:
> running the command
>
> grep -v -F -f pattern-file search-file
>
> with a large pattern-file (in my case 1234 patterns) fails to yield the
> complement of the same command less the -v option. The result is the same
> without the -F option, though _much_ slower.
>
> The patterns I'm using are of the form:
> [email protected]
> My search-file has about 4900 lines of the form:
> 01011: [email protected]
> 20090704T062201 20071105T170000 20071105T173000 norecur 0
> Wrap up after brainstorming Friday
>
> A workaround would be appreciated, since I was really counting on grep -v
> working properly for what I'm trying to do.
Thanks for the report.
It'd help if you would provide a complete example
and mention what version of grep you're using:
- run "grep --version" if you built it yourself,
- or "rpm -q grep" if it's on an rpm-based distro,
- or something like "dpkg -l grep" on a deb-based system.
However, the best would be if you can build and retest
using the latest from the upstream git repository:
It's here:
http://git.savannah.gnu.org/cgit/grep.git/
Build via this:
git clone git://git.sv.gnu.org/grep.git &&
cd grep && ./bootstrap && /configure && make && make check
Then, confirm that your complete example still fails when using
the just-built src/grep.
