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Subject: [bug#30216] [WIP v5] services: agetty: Make tty optional.
Resent-Message-ID: <handler.30216.B30216.151738980219824@debbugs.gnu.org>
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
References: <20180124131219.14202-1-dannym@scratchpost.org>
	<20180124133147.15060-1-dannym@scratchpost.org>
	<87r2q7vzei.fsf@gnu.org> <20180131003018.23bf45d7@scratchpost.org>
Date: Wed, 31 Jan 2018 10:09:57 +0100
In-Reply-To: <20180131003018.23bf45d7@scratchpost.org> (Danny Milosavljevic's
	message of "Wed, 31 Jan 2018 00:30:18 +0100")
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To: Danny Milosavljevic <dannym@scratchpost.org>
Cc: 30216@debbugs.gnu.org

Hey Danny,

Danny Milosavljevic <dannym@scratchpost.org> skribis:

>> I think this would work:
>>=20
>>   (let* ((consoles     (find-long-option "console" (linux-command-line)))
>>          (console-ttys (remove (lambda (console)
>>                                  (string-prefix? "tty" console))
>>                                (string-tokenize consoles not-comma))))
>
> "ttyS0" starts with "tty" but should not be removed...
>
>> Maybe default to /dev/ttyS0?
>
> Sounds unsafe.  Also, on x86_64 that's not really useful either.  It woul=
d be
> good to have a way to the not start the service after all in that case.

What about having =E2=80=98default-serial-port=E2=80=99 return #f in that c=
ase, and do
something like:

  #:start #~(let ((tty #$(default-serial-port)))
              (if tty
                  (make-forkexec-constructor =E2=80=A6)
                  (const #f)))   ;never start

?

Ludo=E2=80=99.