From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#23194: Benign error in installation image: "stty: standard input:
	Input/output error"
Date: Mon, 04 Apr 2016 17:10:20 +0200
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To: Chris Marusich <cmmarusich@gmail.com>
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Chris Marusich <cmmarusich@gmail.com> skribis:

> In the installation image for GuixSD v0.10.0, I get some I/O errors on
> the terminal just before/during/after the MOTD is displayed:
>
> "stty: standard input: Input/output error"

With a patch like this, the issue vanishes:


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Content-Type: text/x-patch
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diff --git a/gnu/services/base.scm b/gnu/services/base.scm
index b168543..aa34aa8 100644
--- a/gnu/services/base.scm
+++ b/gnu/services/base.scm
@@ -482,6 +482,7 @@ strings or string-valued gexps."
       (let ((pid (primitive-fork)))
         (case pid
           ((0)
+           (sleep 1)
            (close-fdes 0)
            (dup2 (open-fdes #$tty O_RDONLY) 0)
            (close-fdes 1)

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This hints at a race condition.

I *think* that the problem is that at the time the =E2=80=98console-font-X=
=E2=80=99
service starts and invokes =E2=80=98unicode_start=E2=80=99, it may be that =
mingetty
hasn=E2=80=99t opened the tty yet.

Indeed, the =E2=80=98term-ttyX=E2=80=99 services are considered started as =
soon as
mingetty is running, but there=E2=80=99s a chance that it=E2=80=99s running=
 and has not
opened the tty yet.

I think we should use another implementation that doesn=E2=80=99t have this
problem (agetty?).  Given that mingetty.c is 400 lines, we might as well
do it in Scheme.

Ludo=E2=80=99.

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