GNU logs - #39023, boring messages

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Subject: bug#39023: binary installation manual doesn't work on Alpine Linux
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The commands in https://guix.gnu.org/manual/en/guix.html#Build-Environmen=
t-Setup=0Ado not work on busybox-based systems such as Alpine Linux by de=
fault.=0AThis is because they do not have 'groupadd' or 'useradd' by defa=
ult (from 'shadow' package).=0A=0A# groupadd --system guixbuild=0A# for i=
 in `seq -w 1 10`;=0A  do=0A    useradd -g guixbuild -G guixbuild        =
   \=0A            -d /var/empty -s `which nologin`    \=0A            -c=
 "Guix build user $i" --system    \=0A            guixbuilder$i;=0A  done=
=0A=0AI suggest adding another example which works by default on busybox.=
=0AExplanation: -S means 'add system group/user'; -h is 'home directory';=
 -g is 'GECOS field'=0AAlso, Alpine Linux fails to boot if /var/empty is =
not owned by root, so that needs to be fixed afterward as well.=0A=0Aaddg=
roup -S guixbuild=0Afor i in `seq -w 1 10`;=0Ado=0Aadduser -G guixbuild \=
=0A-h /var/empty -s `which nologin` \=0A-g "Guix build user $i" -S \=0Agu=
ixbuilder$i;=0Adone=0Achown root:root /var/empty # /var/empty must be own=
ed by root, fix permission after `adduser` modified it

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: symphonia@HIDDEN
Subject: bug#39023: Acknowledgement (binary installation manual doesn't
 work on Alpine Linux)
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39023: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D39023
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Subject: bug#39023: binary installation manual doesn't work on Alpine Linux
Resent-From: =?UTF-8?Q?G=C3=A1bor?= Boskovits <boskovits@HIDDEN>
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Date: Wed, 8 Jan 2020 13:34:00 +0100
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Hello,

<symphonia@HIDDEN> ezt =C3=ADrta (id=C5=91pont: 2020. jan. 7., K, 22:3=
2):
>
> The commands in https://guix.gnu.org/manual/en/guix.html#Build-Environmen=
t-Setup
> do not work on busybox-based systems such as Alpine Linux by default.
> This is because they do not have 'groupadd' or 'useradd' by default (from=
 'shadow' package).
>
> # groupadd --system guixbuild
> # for i in `seq -w 1 10`;
>   do
>     useradd -g guixbuild -G guixbuild           \
>             -d /var/empty -s `which nologin`    \
>             -c "Guix build user $i" --system    \
>             guixbuilder$i;
>   done
>
> I suggest adding another example which works by default on busybox.
> Explanation: -S means 'add system group/user'; -h is 'home directory'; -g=
 is 'GECOS field'
> Also, Alpine Linux fails to boot if /var/empty is not owned by root, so t=
hat needs to be fixed afterward as well.
>
> addgroup -S guixbuild
> for i in `seq -w 1 10`;
> do
> adduser -G guixbuild \
> -h /var/empty -s `which nologin` \
> -g "Guix build user $i" -S \
> guixbuilder$i;
> done
> chown root:root /var/empty # /var/empty must be owned by root, fix permis=
sion after `adduser` modified it
>
>
>
I assume that the command you gave would work on non-busybox also. I
would say we should replace the
command we have with this more compatible one.

I would wait for a few more responses, though.

If that sounds good to you could you create a patch to that effect?

Best regards,
g_bor
--=20
OpenPGP Key Fingerprint: 7988:3B9F:7D6A:4DBF:3719:0367:2506:A96C:CF63:0B21

Message sent to bug-guix@HIDDEN:

Subject: bug#39023: adduser/addgroup vs useradd/groupadd
References: <4678e0a6a529877fee91a452424115c1@HIDDEN>
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From: zimoun <zimon.toutoune@HIDDEN>
Date: Wed, 22 Jan 2020 02:44:24 +0100
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Dear,

The bug [1] reports that useradd/groupadd are not provided on BusyBox.
And for example, they had this discussion [2].

[1] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=39023
[2] http://lists.busybox.net/pipermail/busybox/2016-February/083907.html

For example, on Debian, adduser is a Perl script calling useradd under the hood.

And the current Guix manual says:

<<
On a GNU/Linux system, a build user pool may be created like this
(using Bash syntax and the shadow commands):
>>

where the parenthesis should be understood as: "adapt to your distribution".

Two options:

 a/ explicitly notice in the parenthesis that the chunk needs to be
adapted; mentioning adduser/addgroup instead of useradd/groupadd for
example.

 b/ replace useradd/groupadd by adduser/addgroup using the
corresponding options.

The option b/ means that 'adduser/addgroup' is more portable (more
chance to work on everywhere GNU/linux). I am not convinced.

Personally, I am in favor for option a/.

What do the *NIX gurus think?

All the best,
simon

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G=C3=A1bor,

G=C3=A1bor Boskovits =E5=86=99=E9=81=93=EF=BC=9A
> <symphonia@HIDDEN> ezt =C3=ADrta (id=C5=91pont: 2020. jan. 7., K,=20
> 22:32):
>> I suggest adding another example which works by default on=20
>> busybox.

[=E2=80=A6]

>> addgroup -S guixbuild

[=E2=80=A6]

> I assume that the command you gave would work on non-busybox=20
> also. I
> would say we should replace the
> command we have with this more compatible one.

It doesn't even work on Guix:

  nckx@berlin ~$ adduser
  -bash: adduser: command not found

Kind regards,

T G-R

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Hullo Simon,

zimoun =E5=86=99=E9=81=93=EF=BC=9A
> options:
>
>  a/ explicitly notice in the parenthesis that the chunk needs to=20
>  be
> adapted; mentioning adduser/addgroup instead of useradd/groupadd=20
> for
> example.

There's also:

  c/ do nothing, or

  d/ include the complete code snippet provided by symphonia, but=20
  as an =E2=80=98out-of-band=E2=80=99 footnote to avoid confusion/blind=20
  copy-pasting/distracting the majority of (GNU) users with=20
  irrelevant variants.

With a/, the user won't know which options to change, or how.=20
They might not understand our =E2=80=98useradd=E2=80=99 syntax, and won't h=
ave its=20
man page installed.

As implied by my reply to G=C3=A1bor, b/ isn't an option so I've=20
snipped it.

I strongly prefer option d/.

> What do the *NIX gurus think?

GNU's not *NIX! :o)  (Nor is it POSIX.)

Kind regards,

T G-R

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Hi Tobias,

On Wed, 22 Jan 2020 at 05:03, Tobias Geerinckx-Rice <me@HIDDEN> wrote:
> zimoun =E5=86=99=E9=81=93=EF=BC=9A

> >  a/ explicitly notice in the parenthesis that the chunk needs to
> >  be
> > adapted; mentioning adduser/addgroup instead of useradd/groupadd
> > for
> > example.
>
> There's also:
>
>   c/ do nothing, or

It is not fair, IMHO. :-)


>   d/ include the complete code snippet provided by symphonia, but
>   as an =E2=80=98out-of-band=E2=80=99 footnote to avoid confusion/blind
>   copy-pasting/distracting the majority of (GNU) users with
>   irrelevant variants.

Well, mixing the option a/ and b/. :-)
 - telling explicitly
 - providing copy/paste-able variant snippet
Yes, it is a better option.


> With a/, the user won't know which options to change, or how.
> They might not understand our =E2=80=98useradd=E2=80=99 syntax, and won't=
 have its
> man page installed.

Yes, and they would not know neither if their foreign distro comes
with exotic 'adduser/addgroup'.


> As implied by my reply to G=C3=A1bor, b/ isn't an option so I've
> snipped it.

Yes, it is my assumption --based on my small experience-- that
'adduser/addgroup' is less portable than 'useradd/groupadd'.


> I strongly prefer option d/.

Let go to this one. :-)

Hum? let see I am able to include the complete code snippet as an
footnote using Texinfo...
(Maybe someone will beat me. :-)


> > What do the *NIX gurus think?
>
> GNU's not *NIX! :o)  (Nor is it POSIX.)

H=C3=A9h=C3=A9! Schr=C3=B6dinger's distro: by installing Guix on your forei=
gn *NIX
distro, the user will have in the same time "not *NIX" and *NIX. ;-)

(Even if *NIX needs to run linux which mitigate the joke. :-))

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Oops, I missed that.

Tobias Geerinckx-Rice <me@HIDDEN> ezt =C3=ADrta (id=C5=91pont: 2020. jan=
.
22., Sze, 4:53):
>
> G=C3=A1bor,
>
> G=C3=A1bor Boskovits =E5=86=99=E9=81=93=EF=BC=9A
> > <symphonia@HIDDEN> ezt =C3=ADrta (id=C5=91pont: 2020. jan. 7., K,
> > 22:32):
> >> I suggest adding another example which works by default on
> >> busybox.
>
> [=E2=80=A6]
>
> >> addgroup -S guixbuild
>
> [=E2=80=A6]
>
> > I assume that the command you gave would work on non-busybox
> > also. I
> > would say we should replace the
> > command we have with this more compatible one.
>
> It doesn't even work on Guix:
>
>   nckx@berlin ~$ adduser
>   -bash: adduser: command not found
>
> Kind regards,
>

I believe these can be implemented using simple manipulation of config file=
s.
Also useradd is part of the linux standard base, while adduser is not.

We could add the busybox example, but it might be better to come up
with something
universal.

There was some upstream discussion to get useradd and groupadd to
busybox upstream,
as this seems to be causing problems everywhere. They told that they
are unwilling to include them as is,
but would accept a wrapper thar forward to their adduser/addgroup
implementation.

> T G-R


Best regards,
g_bor
--=20
OpenPGP Key Fingerprint: 7988:3B9F:7D6A:4DBF:3719:0367:2506:A96C:CF63:0B21

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--=-=-=
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G=C3=A1bor,

G=C3=A1bor Boskovits =E5=86=99=E9=81=93=EF=BC=9A
> Oops, I missed that.

I'm suprised I haven't confused add* & *add once so far in this=20
thread :-)

> There was some upstream discussion to get useradd and groupadd=20
> to
> busybox upstream,
> as this seems to be causing problems everywhere. They told that=20
> they
> are unwilling to include them as is,
> but would accept a wrapper thar forward to their=20
> adduser/addgroup
> implementation.

I don't know which discussion you're referring to, and much might=20
have changed since 2016, but I read this[0] to mean the opposite:=20
Busybox should provide the shadow-compatible *add variants, and=20
reimplement their old add* as simple wrappers around that.  That's=20
from an upstream(ish) person.

  =E2=80=9Cadduser/addgroup tend to be symlinks or wrappers, if they exist=
=20
  at
   all, but by and large are deprecated.  busybox should implement
   applets that mimic shadow here and deprecate the old ones, if=20
   not
   throw them out. although we can probably rename & massage the
   sources in these cases=E2=80=9D

Still, Busybox *add patches welcome, it would seem.  We'll still=20
have to deal with this for the lifetime of the older version.

Kind regards,

T G-R

[0]:=20
http://lists.busybox.net/pipermail/busybox/2016-February/083909.html

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Subject: bug#39023: binary installation manual doesn't work on Alpine Linux
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Tobias Geerinckx-Rice <me@HIDDEN> ezt =C3=ADrta (id=C5=91pont: 2020. jan=
.
22., Sze, 20:58):
>
> G=C3=A1bor,
>
> G=C3=A1bor Boskovits =E5=86=99=E9=81=93=EF=BC=9A
> > Oops, I missed that.
>
> I'm suprised I haven't confused add* & *add once so far in this
> thread :-)

Yes, I am also a bit confused.

>
> > There was some upstream discussion to get useradd and groupadd
> > to
> > busybox upstream,
> > as this seems to be causing problems everywhere. They told that
> > they
> > are unwilling to include them as is,
> > but would accept a wrapper thar forward to their
> > adduser/addgroup
> > implementation.
>
> I don't know which discussion you're referring to, and much might
> have changed since 2016, but I read this[0] to mean the opposite:
> Busybox should provide the shadow-compatible *add variants, and
> reimplement their old add* as simple wrappers around that.  That's
> from an upstream(ish) person.
>
>   =E2=80=9Cadduser/addgroup tend to be symlinks or wrappers, if they exis=
t
>   at
>    all, but by and large are deprecated.  busybox should implement
>    applets that mimic shadow here and deprecate the old ones, if
>    not
>    throw them out. although we can probably rename & massage the
>    sources in these cases=E2=80=9D
>
> Still, Busybox *add patches welcome, it would seem.  We'll still
> have to deal with this for the lifetime of the older version.

Yes, I referred to this, but I might have misunderstood something.

>
> Kind regards,
>
> T G-R
>
> [0]:
> http://lists.busybox.net/pipermail/busybox/2016-February/083909.html



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