socketpair - create a pair of connected sockets
Standard C Library (libc, -lc)
socketpair(int d, int type, int protocol, int *sv);
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 and sv. The two sockets are indistinguishable.
A 0 is returned if the call succeeds, -1 if it fails.
The call succeeds unless:
[EMFILE] Too many descriptors are in use by this process.
[ENFILE] The system file table is full.
[EAFNOSUPPORT] The specified address family is not supported on this
[EPROTONOSUPPORT] The specified protocol is not supported on this
[EOPNOTSUPP] The specified protocol does not support creation of
[EFAULT] The address sv does not specify a valid part of the
process address space.
pipe(2), read(2), write(2)
The socketpair() function call appeared in 4.2BSD.
This call is currently implemented only for the UNIX domain.
BSD October 16, 2001 BSD
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