socketpair: vytvořit pár připojených soketů

Originální popis anglicky: socketpair - create a pair of connected sockets

Návod, kniha: Linux Programmer's Manual

STRUČNĚ

#include <sys/types.h> #include <sys/socket.h> int socketpair(int d, int type, int protocol, int sv[2]);

POPIS / INSTRUKCE

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.

NÁVRATOVÁ HODNOTA

On success, zero is returned. On error, -1 is returned, and errno is set appropriately.

CHYBY / ERRORY

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 limit on the total number of open files has been reached.

EOPNOTSUPP

The specified protocol does not support creation of socket pairs.

EPROTONOSUPPORT

The specified protocol is not supported on this machine.

ODPOVÍDAJÍCÍ

4.4BSD, SUSv2, POSIX 1003.1-2001. The socketpair function call appeared in 4.2BSD. It is 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 restriction.)

SOUVISEJÍCÍ

pipe(2), read(2), socket(2), write(2), unix(7)