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Copyright 1989 AT&T
Copyright (C) 2002, Sun Microsystems, Inc. All Rights Reserved
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socketpair - create a pair of connected sockets

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]);

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.

The type arguments supports the various flags that modify the returned socket's behavior that are discussed in socket(3SOCKET): SOCK_CLOEXEC, SOCK_CLOFORK, SOCK_NDELAY, and SOCK_NONBLOCK.

socketpair() returns -1 on failure and 0 on success. The call succeeds unless: EAFNOSUPPORT EMFILE ENOMEM ENOSR EOPNOTSUPP EPROTONOSUPPORT EACCES See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

MT-Level Safe

pipe (2), read (2), write (2), socket.h (3HEAD), attributes (7) This call is currently implemented only for the AF_UNIX address family.