Date: Thu, 21 Nov 2013 11:04:32 +0100 From: Florent Peterschmitt <florent@peterschmitt.fr> To: Dimitry Andric <dim@FreeBSD.org> Cc: freebsd-stable stable <freebsd-stable@freebsd.org> Subject: Re: tcpdump | grep pattern > capture nothing got Message-ID: <528DDAB0.7020002@peterschmitt.fr> In-Reply-To: <528DBF67.1090107@peterschmitt.fr> References: <528D0302.7090906@peterschmitt.fr> <966AFB1F-D273-4754-96AC-01298FBF6F42@FreeBSD.org> <528DBF67.1090107@peterschmitt.fr>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --VgGKIgAiwqvjrldiPnGWipvNJ4MIkowgP Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 21/11/13 09:08, Florent Peterschmitt wrote: > On 20/11/13 23:38, Dimitry Andric wrote: >> On 20 Nov 2013, at 19:44, Florent Peterschmitt <florent@peterschmitt.f= r> wrote: >>> I use FreeBSD 10.0-BETA3 amd64, upgraded from 9.2-RELEASE with >>> freebsd-update. >>> >>> I was capturing with tcpdump and doing some grep on it: >>> >>> # tcpdump -li nfe0 port 53 | grep Refused > capture.txt >>> >>> I was surprised that capture.txt is totally empty. If I don't redirec= t >>> the output, then it writes what I need on stdout. >> >> Try grep --line-buffered instead (which incurs a performance penalty, >> but you probably don't care in this case). >> >> BSD grep also supports this option. >> >> -Dimitry >> >=20 > It works, thank you. But, I didn't have to do this on a GNU/Linux > machine. Is that normal? >=20 Woops my bad, it's the same on both FreeBSD and Linux. --=20 Florent Peterschmitt | Please: florent@peterschmitt.fr | * Avoid HTML/RTF in E-mail. +33 (0)6 64 33 97 92 | * Send PDF for documents. http://florent.peterschmitt.fr | * Trim your quotations. Really. Proudly powered by Open Source | Thank you :) --VgGKIgAiwqvjrldiPnGWipvNJ4MIkowgP Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJSjdqwAAoJEFr01BkajbiB04cP/2ZWulcGQtmRwmkoSW8kTEAw xF6uztpP6Tnj4mPrsprZ0/oSDKnh38ZluD94kcMwcpG5uwNcMR2jaQIbQB52Pnf0 8F0Z9oOzct9Wo4UzXgDcGVOahCm0FCdsVXXtUscybqSg9JJT98bLxLnCLeWeVOB4 3rfVJJdaeBxm4DYeJoWYO9ExbrXa5YVYI5Z6A8PyMMjqNxRwbI/oG0+IjFVc7qEV rVJhQ6LrQycUClWba1XdzbeJyFC8FfRZKhhqVY6kFJLsW3KKXa8pr4KnpvMkeq+c aINC1A3sI8fkG2ma6ebKRs0clvp/4ZDrSMeucTdkBDYGHGMA8lED4zqveUFXSCfS KHHA/0zwR8zv1uVDcsCXPFIMDm/SlB0tqHi3UVYuMZqs5kbXhotYloGHIqgTWRIK WFFfhzr90+fEXq4mRakTmKnhlGM7AcB9anLUhHqojMledoFAL9rte7XkbOZHQArd YUWFwWfUoNsv9LJLfMQxcf25yyiAcyyrDcObPd6I3cz+i2KmFHQ50NjyDQ8qna7H eTd8HqwHOJP6KAe4eWQbqHo1kvfaf9QixR5Bn8TowOA5TgST6KRoXYhJpIUHr8j9 Da73LTV+kvSL0Svz65zBCylaz7MF6Dn4XGEa4V3HF1ipacwwvTioD/CHLnO/PYpm bEmd/K07OHhQsSHPom+H =7Q0q -----END PGP SIGNATURE----- --VgGKIgAiwqvjrldiPnGWipvNJ4MIkowgP--
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