Date: Thu, 20 Dec 2007 12:51:26 -0500 From: Mikhail Teterin <mi+mill@aldan.algebra.com> To: Erik Osterholm <freebsd-lists-erik@erikosterholm.org> Cc: questions@freebsd.org Subject: Re: tail does not exit Message-ID: <200712201251.27067.mi%2Bmill@aldan.algebra.com> In-Reply-To: <20071220165807.GA34089@aleph.cepheid.org> References: <200712192322.lBJNMfps053071@aldan.algebra.com> <200712201102.59565@aldan> <20071220165807.GA34089@aleph.cepheid.org>
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четвер 20 грудень 2007 11:58 до, Erik Osterholm Ви написали: > Ah, I see. With very, very long lines, tail doesn't send the output > all at once. The cutoff seems to be 65536 bytes on my system. They don't even have to be very very long -- unless in an artificial example, such as the one I posted. Normal-width text files can also trigger inconsistent behavior in some real-life scenario, where awk actually does some real processing of its input for a while. The awk script may decide to quit after processing the first 1000 (normal-length) lines, for example... The behavior of the program will then be different depending on whether the average line-length is above, at, or below 65.536 characters. Maybe, it is awk's fault -- it should not be read-ing more than one line at a time, because the script may cause it to ignore some of the read data. Using line-buffering or some such? -mi
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