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Top Forums UNIX for Dummies Questions & Answers A question about Unix Architecture. Post 302688007 by Corona688 on Friday 17th of August 2012 11:09:02 AM
Old 08-17-2012
You're asking like UNIX is a kind of computer; it isn't.

UNIX can run on many kinds of processors and memories, on scales from embedded microcomputer(things like wireless routers) all the way up to distributed clusters and supercomputers.

There's also many kinds of kernels of several kinds you mention; there's real-tasking UNIXes(QNX), monolithic(Linux, though that's technically UNIX-like), and more.

How is this possible?

Easy -- they're not all the same thing. UNIX is a design plan, not an operating system. As long as your OS is certified as providing the right set of features, it can be considered a UNIX, no matter how it's built internally. Lots of different individuals and software companies have built a UNIX to their own design or need.

So, it's very difficult to be anything but vague about "what is UNIX" with respect to those particular questions. You need to be more specific about which UNIX.
 

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IO::Socket::UNIX(3pm)					 Perl Programmers Reference Guide				     IO::Socket::UNIX(3pm)

NAME
IO::Socket::UNIX - Object interface for AF_UNIX domain sockets SYNOPSIS
use IO::Socket::UNIX; DESCRIPTION
"IO::Socket::UNIX" provides an object interface to creating and using sockets in the AF_UNIX domain. It is built upon the IO::Socket interface and inherits all the methods defined by IO::Socket. CONSTRUCTOR
new ( [ARGS] ) Creates an "IO::Socket::UNIX" object, which is a reference to a newly created symbol (see the "Symbol" package). "new" optionally takes arguments, these arguments are in key-value pairs. In addition to the key-value pairs accepted by IO::Socket, "IO::Socket::UNIX" provides. Type Type of socket (eg SOCK_STREAM or SOCK_DGRAM) Local Path to local fifo Peer Path to peer fifo Listen Create a listen socket If the constructor is only passed a single argument, it is assumed to be a "Peer" specification. NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE As of VERSION 1.18 all IO::Socket objects have autoflush turned on by default. This was not the case with earlier releases. NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE METHODS
hostpath() Returns the pathname to the fifo at the local end peerpath() Returns the pathanme to the fifo at the peer end SEE ALSO
Socket, IO::Socket AUTHOR
Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to <perl5-porters@perl.org>. COPYRIGHT
Copyright (c) 1996-8 Graham Barr <gbarr@pobox.com>. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.1 2010-04-26 IO::Socket::UNIX(3pm)
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