Date: Fri, 18 Aug 2000 15:38:30 -0500 (CDT) From: Mike Meyer <mwm@mired.org> To: "Kevin Oberman" <oberman@es.net> Cc: "James A Wilde" <james.wilde@telia.com>, questions@FreeBSD.ORG Subject: Re: Sun OS (Was: BSD Inquiry...) Message-ID: <14749.40646.311975.30537@guru.mired.org> In-Reply-To: <200008181644.e7IGiuU23126@ptavv.es.net> References: <002801c00905$504109e0$8208a8c0@iqunlimited.net> <200008181644.e7IGiuU23126@ptavv.es.net>
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Kevin Oberman writes: > > From: "James A Wilde" <james.wilde@telia.com> > > Date: Fri, 18 Aug 2000 13:13:19 +0200 > > > Linux isn't based on Unix source code. It's a rewrite from scratch > > > based on the SysV manuals. So the flavor is a lot like SysV (or > > > Solaris). On the other hand, there's no centralized source for Linux > > > code outside the kernel, so you never know... > > ...and presumably then Posix is SysV-like cos I know Linus has said that the > > Linux kernel aims to be Posix compatible. > Just to avoid confusing many, many people, Posix is NOT an operating > system. It is a standard for code portability and specifies things > like utilities and libraries. It, in no way, specifies an OS. VMS was > Posix and I think Windows NT might well be. Some of the things Posix specifies are system calls. However, since the goal is code portability, whether what you're discussing is a system call or a library call is moot. This is why VMS can be Posix compliant. And why Windows NT can do it, thought I believe it requires an add-on. > Posix has a few dumb things in it, but it is a good concept and it's > generally a good idea to comply. (Posix regular expressions being a > significant exception, IMHO.) I'm one of the people who believe that if Unix vendors had managed to get behind a standard in the '80s, rather than all of them doing their own extensions, the world would be a much different - and better - place. So I concur! <mike To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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