> int socketfrom(int template, int domain, int type, int protocol);

> Which would return a new socket using the socket options already set
> on socket "template".  If domain, type, and protocol don't match,
> this is an error (or perhaps it would be best to omit them entirely
> and just have one argument, the template socket.

> Opinions?

Sort of like dup() but at the socket layer instead of the
open-file-table layer.  I like it, though I'd do as you suggest and
skip everything but the template socket.

I don't like Greg Woods's idea of having process-default socket
options, because I much prefer to have some way to name this collection
of options, rather than having just one set of default options for a
whole process.  Using a socket on which they have been set isn't the
best (it uses up a file descriptor relatively unnecessarily), but it's
not unreasonable, and I think it's cleaner than inventing a new kind of
API object for the purpose.  I also don't like imposing the same set of
options on sockets of all types.

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