Date: Tue, 03 Aug 2010 20:21:56 +0200 From: Gabor Kovesdan <gabor@FreeBSD.org> To: poyopoyo@puripuri.plala.or.jp Cc: current@FreeBSD.org Subject: Re: bsdgrep does not work with tail -f | grep combination Message-ID: <4C585E44.5030608@FreeBSD.org> In-Reply-To: <86eiefhalp.wl%poyopoyo@puripuri.plala.or.jp>
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Em 2010.08.03. 19:25, poyopoyo@puripuri.plala.or.jp escreveu: > Hi, > > It seems bsdgrep does not work when piped from tail -f. > I'm running r210728. > > term0$ jot 10> /tmp/1 > term0$ tail -f /tmp/1 | grep 0 > [no output] > > otherterm$ jot 10>> /tmp/1 > [no output to term0] > > ===== > > with GNU grep: > > term0$ tail -f /tmp/1 | gnugrep 0 > 10 > otherterm$ jot 10>> /tmp/1 > [on term0] > 10 > 10 > I've checked on 8.0 and GNU grep doesn't output anything either for me. If you use tail -f, you will enter more lines and end it with EOF, won't you? And then BSD grep will process the input and print out matches. I don't think it's bad behaviour in itself but if you can explain why you think it's bad I'm willing to change it. Thanks for your comment, Gaborhome | help
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