#include <sys/types.h>
#include <sys/socket.h> int
socketpair (int d int type int protocol int *sv);
DESCRIPTION
The
socketpair ();
system call creates an unnamed pair of connected sockets in
the specified domain
Fa d ,
of the specified
Fa type ,
and using the optionally specified
Fa protocol .
The descriptors used in referencing the new sockets
are returned in
Fa sv Ns [0]
and
Fa sv Ns [1] .
The two sockets are indistinguishable.
RETURN VALUES
Rv -std socketpair
ERRORS
The call succeeds unless:
Bq Er EMFILE
Too many descriptors are in use by this process.
Bq Er EAFNOSUPPORT
The specified address family is not supported on this machine.
Bq Er EPROTONOSUPPORT
The specified protocol is not supported on this machine.
Bq Er EOPNOTSUPP
The specified protocol does not support creation of socket pairs.
Bq Er EFAULT
The address
Fa sv
does not specify a valid part of the
process address space.
