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(sunos section 3socket)
man page for socketpair

socketpair(3SOCKET)					     Sockets Library Functions					       socketpair(3SOCKET)

socketpair - create a pair of connected sockets SYNOPSIS
cc [ flag ... ] file ... -lsocket -lnsl [ library ... ] #include <sys/types.h> #include <sys/socket.h> int socketpair(int domain, int type, int protocol, int sv[2]); DESCRIPTION
The socketpair() library call creates an unnamed pair of connected sockets in the specified address family domain, of the specified type, that uses the optionally specified protocol. The descriptors that are used in referencing the new sockets are returned in sv[0] and sv[1]. The two sockets are indistinguishable. RETURN VALUES
socketpair() returns -1 on failure and 0 on success. ERRORS
The call succeeds unless: EAFNOSUPPORT The specified address family is not supported on this machine. EMFILE Too many descriptors are in use by this process. ENOMEM There was insufficient user memory for the operation to complete. ENOSR There were insufficient STREAMS resources for the operation to complete. EOPNOTSUPP The specified protocol does not support creation of socket pairs. EPROTONOSUPPORT The specified protocol is not supported on this machine. EACCES The process does not have appropriate privileges. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |MT-Level |Safe | +-----------------------------+-----------------------------+ SEE ALSO
pipe(2), read(2), write(2), socket.h(3HEAD), attributes(5) NOTES
This call is currently implemented only for the AF_UNIX address family. SunOS 5.10 10 Jan 2001 socketpair(3SOCKET)

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