SOCKETPAIR(3SOCKET) Sockets Library Functions SOCKETPAIR(3SOCKET)


NAME


socketpair - create a pair of connected sockets

SYNOPSIS


cc [ flag ... ] file ... -lsocket -lnsl [ library ... ]
#include <sys/types.h>
#include <sys/socket.h>

int socketpair(int domain, int type, int protocol, int sv[2]);


DESCRIPTION


The socketpair() library call creates an unnamed pair of connected
sockets in the specified address family domain, of the specified type,
that uses the optionally specified protocol. The descriptors that are
used in referencing the new sockets are returned in sv[0] and sv[1]. The
two sockets are indistinguishable.

RETURN VALUES


socketpair() returns -1 on failure and 0 on success.

ERRORS


The call succeeds unless:

EAFNOSUPPORT
The specified address family is not supported on this
machine.


EMFILE
Too many descriptors are in use by this process.


ENOMEM
There was insufficient user memory for the operation
to complete.


ENOSR
There were insufficient STREAMS resources for the
operation to complete.


EOPNOTSUPP
The specified protocol does not support creation of
socket pairs.


EPROTONOSUPPORT
The specified protocol is not supported on this
machine.


EACCES
The process does not have appropriate privileges.


ATTRIBUTES


See attributes(7) for descriptions of the following attributes:


+---------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------+
|MT-Level | Safe |
+---------------+-----------------+

SEE ALSO


pipe(2), read(2), write(2), socket.h(3HEAD), attributes(7)

NOTES


This call is currently implemented only for the AF_UNIX address family.


January 10, 2001 SOCKETPAIR(3SOCKET)