Date: Thu, 1 Sep 2016 14:50:36 -0400 From: Allan Jude <allanjude@freebsd.org> To: Anthony Jenkins <Scoobi_doo@yahoo.com>, freebsd-x11@freebsd.org Cc: Colin Percival <cperciva@tarsnap.com> Subject: Re: Fwd: Console only boot option Message-ID: <52049264-cc66-b244-c6eb-fa99f2a236fd@freebsd.org> In-Reply-To: <01000156e712dd33-54873391-f056-4e0a-bf9e-b23a2053a412-000000@email.amazonses.com> References: <e48d3b7a-f2ac-3d12-56a4-b907a36ac099@yahoo.com> <01000156e712dd33-54873391-f056-4e0a-bf9e-b23a2053a412-000000@email.amazonses.com>
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From: Allan Jude <allanjude@freebsd.org>
To: Anthony Jenkins <Scoobi_doo@yahoo.com>, freebsd-x11@freebsd.org
Cc: Colin Percival <cperciva@tarsnap.com>
Message-ID: <52049264-cc66-b244-c6eb-fa99f2a236fd@freebsd.org>
Subject: Re: Fwd: Console only boot option
References: <e48d3b7a-f2ac-3d12-56a4-b907a36ac099@yahoo.com>
<01000156e712dd33-54873391-f056-4e0a-bf9e-b23a2053a412-000000@email.amazonses.com>
In-Reply-To: <01000156e712dd33-54873391-f056-4e0a-bf9e-b23a2053a412-000000@email.amazonses.com>
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On 2016-09-01 14:46, Colin Percival wrote:
>=20
>=20
>=20
> -------- Forwarded Message --------
> Subject: Console only boot option
> Date: Thu, 1 Sep 2016 11:22:23 -0400
> From: Anthony Jenkins via freebsd-x11 <freebsd-x11@freebsd.org>
> Reply-To: Anthony Jenkins <Scoobi_doo@yahoo.com>
> To: freebsd-x11@freebsd.org <freebsd-x11@freebsd.org>
>=20
> I have a patch against base that adds an option "Console" to the Boot
> Options sub-menu to prevent a GUI desktop port from being started:
>=20
> 1. Back to Main Menu [Backspace]
> 2. Load System Defaults
>=20
> Boot Options:
> 3. Safe Mode... Off
> 4. Single User. Off
> 5. Verbose..... off
> 6. Console..... off
>=20
>=20
> When set to "On", a kernel environment variable "boot_console" is set t=
o
> "YES"; else "boot_console" is unset. A GUI desktop startup script in
> ${LOCALBASE}/etc/rc.d/ should read this variable and, if set, should
>=20
> * Ignore a command to start the GUI
> * Unset "boot_console" (this allows one to manually start the GUI
> after initial boot).
>=20
> I'm open to suggestions about semantics to make this functionality
> clearer (e.g. "Console..... On" is not intuitive).
>=20
> The problem I have is in the GUI startup scripts, which must be modifie=
d
> to make this work. What I *want* is to make a *simple* modification to=
> all GUI startup scripts (e.g. ${LOCALBASE}/etc/rc.d/kdm4) such that
> /etc/rc knows what scripts are "GUI startup scripts" and, if
> $boot_console is set, performs the above 2 actions. Right now, for me
> to make this patch work, I have to add code to my kdm4 startup script t=
o
> do this, which would be ugly to add to every GUI startup script in port=
s.
>=20
> Maybe one of the following would be simple/general enough to work:
>=20
> * Have each GUI startup script declare a variable, e.g. "gui_startup"=
,
> which /etc/rc reads to determine whether to disable its startup if
> $boot_console is set.
> * Have an rc.conf(5) variable "gui_startup_scripts" which holds a lis=
t
> of startup scripts to not execute if $boot_console is set.
> * Have each GUI startup script REQUIRE (i.e. rcorder(8))
> "gui_start_check" which fails if $boot_console is set.
>=20
> GUI desktop port maintainers would have to modify their respective port=
s
> to implement option 1 & 3; the user would have to add her desktop to
> /etc/rc.conf for option 2. I'd implement the guts.
>=20
> Other suggestions welcome.
>=20
> https://github.com/ScoobiFreeBSD/freebsd/commit/2376fc13627db10a65bcab9=
d9091cbd8ff049e87
> https://github.com/ScoobiFreeBSD/freebsd/commit/2376fc13627db10a65bcab9=
d9091cbd8ff049e87.patch
>=20
I think I prefer the 3rd option, having a dependant service that is
controlled by the variable from the boot loader. This minimizes the
changes to each port to just a single word added to the metadata.
If the ports people want to decide which method they prefer, I would be
happy to shepherd the changes to the boot loader / menu itself.
--=20
Allan Jude
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