From: Dan Plimak <danp@systematik.co.nz>
To: Cygwin-L <cygwin@cygwin.com>
Subject: Re: DuplicateHandle() failing under MS Telnet Server
Date: Tue, 13 Feb 2001 00:33:00 -0000 [thread overview]
Message-ID: <20010213213421.A540@systematik.co.nz> (raw)
In-Reply-To: <3A87DABB.F72D55C0@etr-usa.com>
On Mon, Feb 12, 2001 at 05:44:43AM -0700, Warren Young wrote:
> This is a "feature" of Microsoft stacks. You can use DuplicateHandle()
> with Winsock 1.1 to do odd things that normally require the new
> WSADuplicateSocket() and other new Winsock 2/Win32 functionality. For a
> fuller explanation, there's an article in my FAQ about this, called
> "Passing Sockets Between Processes".
>
> This feature could be used to implement dup() or maybe dup2() on Winsock
> 1.1 systems, but that's basically only Windows 95, so it's of fairly
> little value these days. (Win98+ and NT 4+ have Winsock 2 installed by
> default.)
Incidentally, it has always pained me to remember that a socket != HANDLE in
Winsock. This underscores the fact that MS's Berkeley sockets implementation
is only a half-assed emulation layer on top of Winsock's WSAxxx function
family, and convenient stuff people are used to doing under UNIX like doing
write()s and read()s on sockets don't work.
*sigh*
> = Warren Young, maintainer of the Winsock Programmer's FAQ at:
-- danp
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next prev parent reply other threads:[~2001-02-13 0:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-10 20:51 Dan Plimak
2001-02-10 20:58 ` Christopher Faylor
2001-02-12 4:44 ` Warren Young
2001-02-13 0:33 ` Dan Plimak [this message]
2001-02-10 21:05 Dan Plimak
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