HPlogo Berkeley Sockets/iX Reference Manual: HP 3000 MPE/iX Computer Systems > Chapter 2 Socket System Calls

SOCKETPAIR

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C Interface

        #include <sys/types.h>

        #include <sys/socket.h>



        socketpair(d, type, protocol, sv)

        int d, type, protocol;

        int sv[2];

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 indistinguishable.

This intrinsic is implemented for AF_UNIX sockets only.

Return Value

If the call is successful, a 0 is returned. If the call fails, a -1 is returned and an error code is stored in errno.

Errors

The following errors are returned by socketpair:

[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, write

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