Socketpair

[arlolra]

No description provided.

[kripken]

I'm not sure how this command should work - what does the native version do, and how is pipe() equivalent to it?

[arlolra]

Socketpair creates a pair of connected sockets.
http://pubs.opengroup.org/onlinepubs/009695399/functions/socketpair.html

The socketpair() function shall create an unbound pair of connected sockets in a specified domain, of a specified type, under the protocol optionally specified by the protocol argument. The two sockets shall be identical. The file descriptors used in referencing the created sockets shall be returned in socket_vector[0] and socket_vector[1].

The implementation above is from Plan9 though,
http://sources.iwp9.org/files/plan9/sys/src/ape/lib/bsd/socketpair.c
which I suppose has bidirectional pipes.

Considering the comment in pipes,

// It is possible to implement this using two device streams, but pipes make
// little sense in a single-threaded environment, so we do not support them.

maybe this is all mute, and it should always return op not supported?

[kripken]

Yeah, I think we should say we do not support this.

[arlolra]

Ok, updated.