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 indistinguishable.
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.