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OpenDarwin 7.2.1 - man page for socketpair (opendarwin section 2)

SOCKETPAIR(2)			     BSD System Calls Manual			    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);

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 indis-
     tinguishable.

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)

BUGS
     This call is currently implemented only for the UNIX domain.

HISTORY
     The socketpair() function call appeared in 4.2BSD.

4.2 Berkeley Distribution		   June 4, 1993 		4.2 Berkeley Distribution


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