+++ /dev/null
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-.\" All rights reserved.
-.\"
-.\" %%%LICENSE_START(BSD_4_CLAUSE_UCB)
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-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by the University of
-.\" California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\" may be used to endorse or promote products derived from this software
-.\" without specific prior written permission.
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-.\"
-.\" @(#)socketpair.2 6.4 (Berkeley) 3/10/91
-.\"
-.\" Modified 1993-07-24 by Rik Faith <faith@cs.unc.edu>
-.\" Modified 1996-10-22 by Eric S. Raymond <esr@thyrsus.com>
-.\" Modified 2002-07-22 by Michael Kerrisk <mtk.manpages@gmail.com>
-.\" Modified 2004-06-17 by Michael Kerrisk <mtk.manpages@gmail.com>
-.\" 2008-10-11, mtk: Add description of SOCK_NONBLOCK and SOCK_CLOEXEC
-.\"
-.TH SOCKETPAIR 2 2008-10-11 "Linux" "Linux Programmer's Manual"
-.SH NAME
-socketpair \- create a pair of connected sockets
-.SH SYNOPSIS
-.BR "#include <sys/types.h>" " /* See NOTES */"
-.br
-.B #include <sys/socket.h>
-.sp
-.BI "int socketpair(int " domain ", int " type ", int " protocol \
-", int " sv [2]);
-.SH DESCRIPTION
-The
-.BR socketpair ()
-call creates an unnamed pair of connected sockets in the specified
-.IR domain ,
-of the specified
-.IR type ,
-and using the optionally specified
-.IR protocol .
-For further details of these arguments, see
-.BR socket (2).
-
-The descriptors used in referencing the new sockets are returned in
-.IR sv [0]
-and
-.IR sv [1].
-The two sockets are indistinguishable.
-.SH RETURN VALUE
-On success, zero is returned.
-On error, \-1 is returned, and
-.I errno
-is set appropriately.
-.SH ERRORS
-.TP
-.B EAFNOSUPPORT
-The specified address family is not supported on this machine.
-.TP
-.B EFAULT
-The address
-.I sv
-does not specify a valid part of the process address space.
-.TP
-.B EMFILE
-Too many descriptors are in use by this process.
-.TP
-.B ENFILE
-The system limit on the total number of open files has been reached.
-.TP
-.B EOPNOTSUPP
-The specified protocol does not support creation of socket pairs.
-.TP
-.B EPROTONOSUPPORT
-The specified protocol is not supported on this machine.
-.SH CONFORMING TO
-4.4BSD, POSIX.1-2001.
-The
-.BR socketpair ()
-function call appeared in 4.2BSD.
-It is generally portable to/from
-non-BSD systems supporting clones of the BSD socket layer (including
-System\ V variants).
-.SH NOTES
-On Linux, the only supported domain for this call is
-.B AF_UNIX
-(or synonymously,
-.BR AF_LOCAL ).
-(Most implementations have the same restriction.)
-
-Since Linux 2.6.27,
-.BR socketpair ()
-supports the
-.BR SOCK_NONBLOCK
-and
-.BR SOCK_CLOEXEC
-flags described in
-.BR socket (2).
-
-POSIX.1-2001 does not require the inclusion of
-.IR <sys/types.h> ,
-and this header file is not required on Linux.
-However, some historical (BSD) implementations required this header
-file, and portable applications are probably wise to include it.
-.SH SEE ALSO
-.BR pipe (2),
-.BR read (2),
-.BR socket (2),
-.BR write (2),
-.BR socket (7),
-.BR unix (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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