From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#23970: colordiff glitch
Date: Wed, 13 Jul 2016 23:39:31 +0200
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References: <CAEwRq=oB6izVDHPcbTHsOq4maKVmPwgppMrZKGMJ=B2xXs+ZMw@mail.gmail.com>
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	(Vincent Legoll's message of "Wed, 13 Jul 2016 11:10:04 +0200")
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To: Vincent Legoll <vincent.legoll@gmail.com>
Cc: 23970@debbugs.gnu.org

Hello,

Vincent Legoll <vincent.legoll@gmail.com> skribis:

> during "guix package -i colordiff" I saw this error being reported:
>
> cp colordiffrc /gnu/store/gc9vqsz0jzylcdsik0hmnghiff1kf3am-colordiff-1.0.=
16/etc/colordiffrc
> chown root.root
> /gnu/store/gc9vqsz0jzylcdsik0hmnghiff1kf3am-colordiff-1.0.16/etc/colordif=
frc
> chown: invalid user: =E2=80=98root.root=E2=80=99
> Makefile:24: recipe for target 'install' failed
> make: [install] Error 1 (ignored)
> chmod 644 /gnu/store/gc9vqsz0jzylcdsik0hmnghiff1kf3am-colordiff-1.0.16/et=
c/colordiffrc
> phase `install' succeeded after 0.1 seconds
>
> But it looks like it is harmless (at least from the guix install PoV)

It=E2=80=99s indeed harmless and fine.

> vince@guixsd ~/guix-packages$ l
> /gnu/store/gc9vqsz0jzylcdsik0hmnghiff1kf3am-colordiff-1.0.16/etc/
> total 4.0K
> -r--r--r-- 2 root guixbuild 963 Jan  1  1970 colordiffrc
>
> This leaks the guixbuild group into /gnu/store, but it is not alone in
> doing so...
>
> If I try to do it manually afterwards, it obviously tell me the FS is R/O
>
> root@guixsd /tmp# chown root.root /gnu/store/*colordiff*/etc/*
> chown: changing ownership of
> =E2=80=98/gnu/store/gc9vqsz0jzylcdsik0hmnghiff1kf3am-colordiff-1.0.16/etc=
/colordiffrc=E2=80=99:
> Read-only file system

Right, /gnu/store is meant to be read-only and manually modifying it
voids your warranty.  :-)

  https://www.gnu.org/software/guix/manual/html_node/The-Store.html

For this reason, /gnu/store is a read-only bind-mount on GuixSD.

That files in /gnu/store have group =E2=80=98guixbuild=E2=80=99 is innocuou=
s.

I hope this clarifies things!

Ludo=E2=80=99.