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->SOCKETPAIR(2) 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 spec-
- ified protocol. The descriptors used in referencing the new sockets are
- returned in sv[0] and sv[1]. The two sockets are indistinguishable.
-
-RETURN VALUES
- 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.
-
- [EOPNOTSUPP] 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.
-
- [ENFILE] The system file table is full.
-
-SEE ALSO
- pipe(2), read(2), write(2)
-
-BUGS
- This call is currently implemented only for the LOCAL domain. Many oper-
- ating systems only accept a protocol of PF_UNSPEC, so that should be used
- instead of PF_LOCAL for maximal portability.
-
-STANDARDS
- The socketpair() function conforms to X/Open Portability Guide Issue 4.2
- (``XPG4.2'').
-
-HISTORY
- The socketpair() function call appeared in 4.2BSD.
-
-BSD June 4, 1993 BSD
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