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Name

Synopsis

#include <sys/types.h>
#include <sys/socket.h>

int socketpair(int domain, int type, int protocol, int sv[2]);

MT-Level

Safe

Description

The socketpair() library call creates an unnamed pair of connected sockets in the specified address family 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.

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.

EOPNOSUPPORT

The specified protocol does not support creation of socket pairs.

EPROTONOSUPPORT

The specified protocol is not supported on this machine.

See Also

Notes

This call is currently implemented only for the AF_UNIX address family.

Table of Contents

• Name
• Synopsis
• MT-Level
• Description
• Return Values
• Errors
• See Also
• Notes