Date: Wed, 4 Mar 2009 16:17:47 -0800 From: Bill Campbell <freebsd@celestial.com> To: freebsd-questions@freebsd.org Subject: Re: the "yes" comand Message-ID: <20090305001747.GA13774@ayn.mi.celestial.com> In-Reply-To: <op.uqak1hn5flcvyi@da1-desktop-x64> References: <op.uqak1hn5flcvyi@da1-desktop-x64>
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On Thu, Mar 05, 2009, Vasadi I. Claudiu Florin wrote: > Hell-o, > > Ever wondered about the "yes" command? Well, I have. If one does "yes" > into a terminal one get's an infinit output of "y" on a new line each > time. What's the deal here? The ``yes'' command is designed to automate interactive scripts that expect a repetitive string typed manually (e.g. something like fsck but without the ``-y'' option). One would use something like: yes | somecommand It takes a single string argument so if you had a program that always expected the string ``greblefarf'' one could use: yes greblefarf | yourcommand > I saw the same thing on linux, but you only had to type "y" (those cheap > blokes :P) I don't know what you're talking about here. To the best of my knowledge, the yes command works the same on every version of *nix I have used which goes as far back as Radio Shack Xenix in 1982 (the last real OS that Microsoft was responsible for :-). Bill -- INTERNET: bill@celestial.com Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way Voice: (206) 236-1676 Mercer Island, WA 98040-0820 Fax: (206) 232-9186 The pinnacle of open systems is: when moving from vendor to vendor, the design flaws stay the same.
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