Date: Thu, 30 Jan 2003 16:13:39 +0100 From: Ruben de Groot <fbsd-q@bzerk.org> To: Jan Grant <Jan.Grant@bristol.ac.uk> Cc: Darren Pilgrim <dmp@pantherdragon.org>, Giorgos Keramidas <keramida@ceid.upatras.gr>, questions <questions@FreeBSD.ORG> Subject: Re: Why no /dev/one? Message-ID: <20030130151339.GA17486@ei.bzerk.org> In-Reply-To: <Pine.GSO.4.44.0301301150270.17135-100000@mail.ilrt.bris.ac.uk> References: <3E390FF3.5020706@pantherdragon.org> <Pine.GSO.4.44.0301301150270.17135-100000@mail.ilrt.bris.ac.uk>
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On Thu, Jan 30, 2003 at 11:53:05AM +0000, Jan Grant typed: > On Thu, 30 Jan 2003, Darren Pilgrim wrote: > > > Giorgos Keramidas wrote: > > > On 2003-01-30 00:25, Darren Pilgrim wrote: > > > > > >> Why isn't there a /dev/one device to provide an infinite number of > > >> all-ones bytes? > > > > > > > > > Because it's easy to get any sequence of equal bytes by using just > > > /dev/zero and tr(1). Try this command and check the output of hd(1) > > > :-) > > > > > > $ dd if=/dev/zero bs=512 count=1 | tr '\0' '\777' | hd > > > > What I was trying to get at was more a question of if there's some deep > > technical reason for the lack of a /dev/one beyond the triviality of > > flipping the bits in a pipe. > > Nobody's implemented it. It'd be trivial; but why would you want it? And while you're at it, what about /dev/yes and /dev/no to automate interactive scripts. Or, if you like the challenge, a /dev/fibonacci and a /dev/pi would be very welcome :) > > -- > jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/ > Tel +44(0)117 9287088 Fax +44 (0)117 9287112 http://ioctl.org/jan/ > I am now available for general use under a modified BSD licence. > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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