socketpair(3N) socketpair(3N)
NAME
socketpair - create a pair of connected sockets
SYNOPSIS
#include <sys/types.h>
#include <sys/socket.h>
socketpair(d, type, protocol, sv)
int d, type, protocol;
int sv[2];
DESCRIPTION
The socketpair() library call creates an unnamed pair of connected
sockets in the specified address family 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
socketpair() returns a -1 on failure, otherwise it returns the number
of the second file descriptor it creates.
ERRORS
The call succeeds unless:
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.
ENOMEM There was insufficient user memory for the
operation to complete.
ENOSR There were insufficient STREAMS resources for the
operation to complete.
SEE ALSO
NOTES
This call is currently implemented only for the AF_UNIX address
family.
7/91 Page 1