Re: [PATCH v3] Add systemd socket launching support

[Matthew Leach <matthew@mattleach.net>]

Hi Stefan,

Stefan Monnier <monnier@IRO.UMontreal.CA> writes:

>> And I object to exposing file descriptors to Lisp, certainly when that
>> is not necessary.
>
> In other similar functionality I've seen over the years, an alternative
> was to pass the fd as an additional argument on the command line, but in
> any case whether it's received from the environment or the command line,
> the file-descriptor to use will just be an integer, and it's already
> exposed to Lisp.
>
> So, AFAICT we just need 3 elements:
> - a function to get the FD number from systemd (which we could write in
>   Elisp, but is much better implemented as a call to systemd's support
>   library).
> - a way to create a process-object from an existing file-descriptor
> number.

Should the socket descriptor number be passed in from Lisp, or should
this be a Boolean flag that tells make-network-process to consult an
internal variable?  We can separate the libsystemd code from the
make-network-process logic easily in both scenarios.

Thanks,
-- 
Matt