NAME

socketpair − create a pair of connected sockets

SYNOPSIS

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

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

DESCRIPTION

The socketpair() system 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:

0 on success. 

−1 on failure and sets errno to indicate the error. 

ERRORS

EAFNOSUPPORT The specified address family is not supported on this machine. 

EFAULT The address sv does not specify a valid part of the process address space. 

EMFILE Too many descriptors are in use by this process. 

EOPNOSUPPORT The specified protocol does not support creation of socket pairs. 

EPROTONOSUPPORT The specified protocol is not supported on this machine. 

SEE ALSO

pipe(2V), read(2V), write(2V)

BUGS

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

Sun Release 4.1  —  Last change: 21 January 1990