SOCKETPAIR(3SOCKET)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 VALUESsocketpair() 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(5) for descriptions of the following attributes:
┌───────────────┬─────────────────┐
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├───────────────┼─────────────────┤
│MT-Level │ Safe │
└───────────────┴─────────────────┘
SEE ALSOpipe(2), read(2), write(2), socket.h(3HEAD), attributes(5)NOTES
This call is currently implemented only for the AF_UNIX address family.
Jan 10, 2001 SOCKETPAIR(3SOCKET)