SOCKETPAIR(2) Linux Programmer's 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[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 indistin-
guishable.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
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.
CONFORMING TO
4.4BSD (the socketpair function call appeared in 4.2BSD). Generally portable to/from non-BSD systems supporting clones of the BSD socket
layer (including System V variants).
NOTES
On Linux, the only supported domain for this call is AF_UNIX (or synonymously, AF_LOCAL). (Most implementations have the same restric-
tion.)
SEE ALSO read(2), write(2), pipe(2), socket(2), unix(7)BSD Man Page 1993-07-24 SOCKETPAIR(2)
Check Out this Related Man Page
SOCKETPAIR(2) BSD System Calls Manual SOCKETPAIR(2)NAME
socketpair -- create a pair of connected sockets
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#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
specified protocol. The descriptors used in referencing the new sockets are returned in sv[0] and sv[1]. The two sockets are indistinguish-
able.
The type and protocol argument values are described in socket(2).
RETURN VALUES
A 0 is returned if the call succeeds, -1 if it fails.
ERRORS
The call succeeds unless:
[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.
[ENFILE] The system file table is full.
[EOPNOTSUPP] The specified protocol does not support creation of socket pairs.
[EPROTONOSUPPORT] The specified protocol is not supported on this machine.
SEE ALSO pipe(2), read(2), socket(2), write(2)HISTORY
The socketpair() function call appeared in 4.2BSD.
BUGS
This call is currently implemented only for the PF_LOCAL domain.
BSD June 24, 2011 BSD
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