afa94a3f97
domain, not a file descriptor. Use 'domain' instead of the original 'd' for this argument to match socket(2). PR: 199491 Reported by: sp55aa@qq.com MFC after: 1 week
101 lines
3.0 KiB
Groff
101 lines
3.0 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 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.
|
|
.\" 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.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)socketpair.2 8.1 (Berkeley) 6/4/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd May 4, 2015
|
|
.Dt SOCKETPAIR 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm socketpair
|
|
.Nd create a pair of connected sockets
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/types.h
|
|
.In sys/socket.h
|
|
.Ft int
|
|
.Fn socketpair "int domain" "int type" "int protocol" "int *sv"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn socketpair
|
|
system call creates an unnamed pair of connected sockets in
|
|
the specified communications
|
|
.Fa domain ,
|
|
of the specified
|
|
.Fa type ,
|
|
and using the optionally specified
|
|
.Fa protocol .
|
|
The descriptors used in referencing the new sockets
|
|
are returned in
|
|
.Fa sv Ns [0]
|
|
and
|
|
.Fa sv Ns [1] .
|
|
The two sockets are indistinguishable.
|
|
.Pp
|
|
The
|
|
.Dv SOCK_CLOEXEC
|
|
and
|
|
.Dv SOCK_NONBLOCK
|
|
flags in the
|
|
.Fa type
|
|
argument apply to both descriptors.
|
|
.Sh RETURN VALUES
|
|
.Rv -std socketpair
|
|
.Sh ERRORS
|
|
The call succeeds unless:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EMFILE
|
|
Too many descriptors are in use by this process.
|
|
.It Bq Er EAFNOSUPPORT
|
|
The specified address family is not supported on this machine.
|
|
.It Bq Er EPROTONOSUPPORT
|
|
The specified protocol is not supported on this machine.
|
|
.It Bq Er EOPNOTSUPP
|
|
The specified protocol does not support creation of socket pairs.
|
|
.It Bq Er EFAULT
|
|
The address
|
|
.Fa sv
|
|
does not specify a valid part of the
|
|
process address space.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr pipe 2 ,
|
|
.Xr read 2 ,
|
|
.Xr socket 2 ,
|
|
.Xr write 2
|
|
.Sh HISTORY
|
|
The
|
|
.Fn socketpair
|
|
system call appeared in
|
|
.Bx 4.2 .
|
|
.Sh BUGS
|
|
This call is currently implemented only for the
|
|
.Ux
|
|
domain.
|