SOCKETPAIR(2)                                                    SOCKETPAIR(2)


NAME
     socketpair - create a pair of connected sockets

SYNOPSIS
     #include <sys/types.h>
     #include <sys/socket.h>

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

DESCRIPTION
     The socketpair call creates an unnamed pair of connected sockets in the
     specified domain 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.

DIAGNOSTICS
     A 0 is returned if the call succeeds, -1 if it fails.

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.

     [EFAULT]            The address sv does not specify a valid part of the
                         process address space.

SEE ALSO
     read(2), write(2), pipe(2)

NOTES
     ABI-compliant versions of the above call can be obtained from
     libsocket.so.

     This call is currently implemented only for the UNIX domain.


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