SOCKETPAIR(3SOCKET) Sockets Library Functions SOCKETPAIR(3SOCKET)
NAME
socketpair - create a pair of connected sockets
SYNOPSIS
cc [
flag ... ]
file ...
-lsocket -lnsl [
library ... ]
#include <sys/types.h>
#include <sys/socket.h>
int socketpair(
int domain,
int type,
int protocol,
int sv[2]);
DESCRIPTION
The
socketpair() library call creates an unnamed pair of connected
sockets in the specified address family
domain, of the specified
type, that uses the optionally specified
protocol. The descriptors
that are used in referencing the new sockets are returned in
sv[0]
and
sv[1]. The two sockets are indistinguishable.
The
type arguments supports the various flags that modify the
returned socket's behavior that are discussed in
socket(3SOCKET):
SOCK_CLOEXEC,
SOCK_CLOFORK,
SOCK_NDELAY, and
SOCK_NONBLOCK.
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.
EOPNOTSUPP The specified protocol does not support creation
of socket pairs.
EPROTONOSUPPORT The specified protocol is not supported on this
machine.
EACCES The process does not have appropriate privileges.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+---------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------+
|MT-Level | Safe |
+---------------+-----------------+
SEE ALSO
pipe(2),
read(2),
write(2),
socket.h(3HEAD),
attributes(7)NOTES
This call is currently implemented only for the
AF_UNIX address
family.
June 21, 2024 SOCKETPAIR(3SOCKET)