Re: Why no /dev/one?
On Thu, Jan 30, 2003 at 12:25:00AM -0800, Darren Pilgrim wrote: Why isn't there a /dev/one device to provide an infinite number of all-ones bytes? And what about /dev/fortytwo? This is IMPORTANT. mf -- What do you care what other people think? msg18170/pgp0.pgp Description: PGP signature
Re: Why no /dev/one?
On Wed, Feb 05, 2003 at 09:10:46PM +0100, Michal F. Hanula wrote: On Thu, Jan 30, 2003 at 12:25:00AM -0800, Darren Pilgrim wrote: Why isn't there a /dev/one device to provide an infinite number of all-ones bytes? And what about /dev/fortytwo? This is IMPORTANT. You can get that with with creative use of tail and /dev/twentyfour. -T -- When an ordinary man attains knowledge, he is a sage; when a sage attains understanding, he is an ordinary man. - Zen saying To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Re: Why no /dev/one?
At 03:25 PM 1/30/03, you wrote: Why isn't there a /dev/one device to provide an infinite number of all-ones bytes? To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message Sounds OK. As I've asked in a separate question to the list, would adding /usr/X11R6/bin to the PATH statement in /etc/rc be a Bad Idea (tm)? -- Roger To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Re: Why no /dev/one?
On 2003-01-30 00:25, Darren Pilgrim [EMAIL PROTECTED] 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 - Giorgos To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Re: Why no /dev/one?
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. To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Re: Why no /dev/one?
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? -- 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 [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Adding /usr/X11R6/bin to the /etc/rc PATH (was: Re: Why no /dev/one?)
On 2003-01-30 17:22, Roger Merritt [EMAIL PROTECTED] wrote: As I've asked in a separate question to the list, would adding /usr/X11R6/bin to the PATH statement in /etc/rc be a Bad Idea (tm)? Yes, it would be a bad idea. Is there need for anything under /usr/X11R6/bin while booting the system? If there isn't, then adding a path in /etc/rc that might conflict with real executables and possibly hide problems if a program happens to have the same name with something under the current PATH but works differently, is a bad idea and a bug waiting to happen. BTW: Please don't hijack irrelevant threads and ask something that is not related to the original topic without changing the subject. It makes it difficult to sort through the original thread in most mailers. Regards, - Giorgos To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Re: Why no /dev/one?
On 2003-01-30 16:13, Ruben de Groot [EMAIL PROTECTED] wrote: On Thu, Jan 30, 2003 at 11:53:05AM +, 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? That's a good reason. Nobody has written one, because nobody thought there would be a good reason to have one. Of course, patches that implement something like that are always ok. But then we'd have to write kernel drivers for /dev/two, /dev/three and /dev/one-million-six too and that's not a good idea :-( 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 :) Argh no! :P This is even more easy with yes(1) $ yes 'custom text' | head -3 custom text custom text custom text $ /me hides in a corner to save himself from the evil tomatoes that are probably heading his way by now :) To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Re: Why no /dev/one?
On Thu, Jan 30, 2003 at 11:53:05AM +, 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 [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Re: Why no /dev/one?
In [EMAIL PROTECTED], Ruben de Groot [EMAIL PROTECTED] typed: 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 :) Yes, but is /dev/pi a suitable substite for /dev/random if you seek far enough into it? mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/consulting.html Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
Re: Why no /dev/one?
On Thu, 30 Jan 2003, Mike Meyer wrote: In [EMAIL PROTECTED], Ruben de Groot [EMAIL PROTECTED] typed: 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 :) Yes, but is /dev/pi a suitable substite for /dev/random if you seek far enough into it? Only if you don't tell anyone exactly how far you're seeking, and if you permit arbitrarily large file offsets. In that case, it's a source of randomness (in that an observer who didn't know the file offset couldn't predict with 100% accuracy the next digit) -- 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/ Roger Penrose can never be convinced that this sentence is true. (If he doesn't get the joke, you can at least prove that he owes you money.) To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-questions in the body of the message
