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NetBSD 6.1.5 - man page for socketpair (netbsd section 2)

SOCKETPAIR(2)			     BSD System Calls Manual			    SOCKETPAIR(2)

NAME
     socketpair -- create a pair of connected sockets

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #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.

     The type and protocol argument values are described in socket(2).

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

ERRORS
     The call succeeds unless:

     [EAFNOSUPPORT]	The specified address family is not supported on this machine.

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

     [EMFILE]		Too many descriptors are in use by this process.

     [ENFILE]		The system file table is full.

     [EOPNOTSUPP]	The specified protocol does not support creation of socket pairs.

     [EPROTONOSUPPORT]	The specified protocol is not supported on this machine.

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

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

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

BSD					  June 24, 2011 				      BSD


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