Date: Thu, 06 Dec 2012 11:46:32 +0800 From: David Xu <davidxu@freebsd.org> To: Marco Steinbach <coco@executive-computing.de> Cc: freebsd-questions@freebsd.org Subject: Re: grep -Dskip doesn't skip FIFOs Message-ID: <50C01518.5090705@freebsd.org> In-Reply-To: <50C010D0.3070205@freebsd.org> References: <alpine.BSF.2.00.1212052350170.36676@probsd.c0c0.intra> <50C010D0.3070205@freebsd.org>
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On 2012/12/06 11:28, David Xu wrote: > On 2012/12/06 07:07, Marco Steinbach wrote: >> Hi there, >> >> grep(1) does not seem to skip FIFOs when told to. > > <snip> > > I think you need a patch to fix it, the bug is in ggrep, it tries to > open a FIFO before checking if it is a FIFO, then blocked. > > http://people.freebsd.org/~davidxu/patch/grep.c.diff > > _______________________________________________ > or the patch: http://people.freebsd.org/~davidxu/patch/grep.c.diff2 The patch opens file with O_NONBLOCK, then turns off O_NONBLOCK, and only checks if a file is a FIFO in reset() function.
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