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C Interface
#include <sys/types.h>
#include <sys/socket.h>
int socketpair (d, type, protocol, sv)
int d, type, 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 indistinguishable.
This intrinsic is implemented for AF_UNIX sockets only.
Return Value
If the call is successful, a 0 is returned. If the call fails, a -1 is
returned and an error code is stored in errno.
Errors
The following errors are returned by socketpair:
| Error Code |
Description |
| [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. |
| [EOPNOSUPPORT] |
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. |
See Also
read,
write
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