SOCKETPAIR (2)
create a pair of connected sockets
SYNOPSIS
#include <sys/types.h>
#include <sys/socket.h>
int socketpair(int d , int type , int protocol , int sv [2]);
DESCRIPTION
The
socketpair
call creates an unnamed pair of connected sockets in
the specified domain
d ,
of the specified
type ,
and using the optionally specified
protocol .
The descriptors used in referencing the new sockets are returned in
sv [0]
and
sv [1].
The two sockets are indistinguishable.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and
errno
is set appropriately.
ERRORS
EMFILE
Too many descriptors are in use by this process.
EAFNOSUPPORT
The specified address family is not supported on this machine.
EPROTONOSUPPORT
The specified protocol is not supported on this machine.
EOPNOSUPPORT
The specified protocol does not support creation of socket pairs.
EFAULT
The address
sv
does not specify a valid part of the process address space.
CONFORMING TO
4.4BSD (the
socketpair
function call appeared in 4.2BSD). Generally portable to/from
non-BSD systems supporting clones of the BSD socket layer (including
System V variants).
SEE ALSO
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