bug#39194: help for non-root users to start using

[Bengt Richter <bokr@bokr.com>]

Hi Ludo,

On +2020-01-19 23:12:43 +0100, Ludovic Courtès wrote:
> Hi Matt,
> 
> Matt Wette <matt.wette@gmail.com> skribis:
> 
> > This guix-1.0.1 on x86_64 Fedora 30.
> >
> > After installing as root, it's not clear from the manual how users
> > should start.
> > I found out "guix pull" is the right thing.
> > Maybe add that to the manual? (Or add a "guix init" command.)
> 
> “guix pull” brings you an up-to-date Guix, which is a good thing, but
> you don’t _have_ to run it to get started.
> 
> > Here is the error that I get w/o "guix pull":
> >
> > [mwette@localhost ~]$ guix install hello
> > Backtrace:
> >            8 (primitive-load "/usr/local/bin/guix")
> > In guix/ui.scm:
> >   1813:12  7 (run-guix-command _ . _)
> > In ice-9/boot-9.scm:
> >     829:9  6 (catch _ _ #<procedure 7effb6272430 at guix/ui.scm:657?> ?)
> >     829:9  5 (catch _ _ #<procedure 7effb6272448 at guix/ui.scm:780?> ?)
> > In guix/scripts/package.scm:
> >    948:10  4 (_)
> > In guix/status.scm:
> >     768:4  3 (call-with-status-report _ _)
> > In guix/scripts/package.scm:
> >    956:14  2 (_)
> > In guix/build/syscalls.scm:
> >   1127:14  1 (call-with-file-lock/no-wait _ #<procedure 7effb42f5cd?> ?)
> > In ice-9/boot-9.scm:
> >     777:6  0 (throw "open-file" "~A: ~S" ("No such file or direc?" ?) ?)
> >
> > ice-9/boot-9.scm:777:6: In procedure throw:
> > In procedure throw: Wrong type argument in position 1: open-file
> 
> I believe this is fixed by commit 7842ddcbc118cbc2799e22651732b7cdc06b93ee.
>

Did that commit cause an automatic update to the tarball
found and used by the binary install script [1] ??

[1] https://git.savannah.gnu.org/cgit/guix.git/plain/etc/guix-install.sh

The latter defines GNU_URL="https://ftp.gnu.org/gnu/guix/"
as its source of tarballs and signatures. Looking at that URL with
a browser, I see

--8<---------------cut here---------------start------------->8---
[ ]guix-binary-1.0.1.x86_64-linux.tar.xz 2019-05-19 16:54 60M 
[ ]guix-binary-1.0.1.x86_64-linux.tar.xz.sig 2019-05-19 16:54 833  
--8<---------------cut here---------------end--------------->8---

and checking on the date of commit 7842dd, I get

--8<---------------cut here---------------start------------->8---
commit 7842ddcbc118cbc2799e22651732b7cdc06b93ee
Author: Ludovic Courtès <ludo@gnu.org>
Date:   Sun Jan 19 22:52:31 2020 +0100

    guix package: Create profiles/per-user/$USER upfront.
    
    Fixes <https://bugs.gnu.org/39194>.
    Reported by Matt Wette <matt.wette@gmail.com>.
    
    * guix/scripts/package.scm (build-and-use-profile): Move
    'ensure-default-profile' call to...
    (process-actions): ... here. 
 --8<---------------cut here---------------end--------------->8---

So for a script user, 2019-05-19 16:54 tarball vs Sun Jan 19 22:52:31 2020 fix
appears to be a problem :)

I doctored the script [1] to do everything but the installing part,
to make sure what tarball was being used by my system. Here is its output:

--8<---------------cut here---------------start------------->8---
[05:53 ~/bs]$ ./get-guix-ver.sh

    ░░░                                     ░░░
    ░░▒▒░░░░░░░░░               ░░░░░░░░░▒▒░░
     ░░▒▒▒▒▒░░░░░░░           ░░░░░░░▒▒▒▒▒░
         ░▒▒▒░░▒▒▒▒▒         ░░░░░░░▒▒░
               ░▒▒▒▒░       ░░░░░░
                ▒▒▒▒▒      ░░░░░░
                 ▒▒▒▒▒     ░░░░░
                 ░▒▒▒▒▒   ░░░░░
                  ▒▒▒▒▒   ░░░░░
                   ▒▒▒▒▒ ░░░░░
                   ░▒▒▒▒▒░░░░░
                    ▒▒▒▒▒▒░░░
                     ▒▒▒▒▒▒░
     _____ _   _ _    _    _____       _
    / ____| \ | | |  | |  / ____|     (_)
   | |  __|  \| | |  | | | |  __ _   _ ___  __
   | | |_ | . ' | |  | | | | |_ | | | | \ \/ /
   | |__| | |\  | |__| | | |__| | |_| | |>  <
    \_____|_| \_|\____/   \_____|\__,_|_/_/\_

This script is a modification of the guix-install.sh script
recommended in the on-line guix manual section on binary
installation [1] where the actual script is also linked [2].

It normally installs GNU Guix on your system, but was modified
by commenting out the actual installation parts, retaining
determination of the release for your system and checking
the signature. In addition sha1 digests of the tarball
and the original and modified scripts are also provided.

[1] https://guix.gnu.org/manual/en/html_node/Binary-Installation.html
[2] https://git.savannah.gnu.org/cgit/guix.git/plain/etc/guix-install.sh

This modified version does not need to be run as root.

https://www.gnu.org/software/guix/
Press return to continue...
[1579528426.548]: Starting installation (Mon 20 Jan 2020 05:53:46 AM PST)
[1579528426.550]: [ PASS ] verification of required commands completed
[1579528426.574]: [ INFO ] init system is: systemd
[1579528426.576]: [ INFO ] system is x86_64-linux
[1579528427.114]: [ PASS ] Release for your system: guix-binary-1.0.1.x86_64-linux
[1579528427.116]: [ INFO ] Downloading Guix release archive
guix-binary-1.0.1.x86_64-linux.tar.xz   100%[==================================================>]  59.66M  7.05MB/s    in 9.2s    
guix-binary-1.0.1.x86_64-linux.tar.xz.s 100%[==================================================>]     833  --.-KB/s    in 0s      
[1579528436.864]: [ PASS ] download completed.
[1579528437.426]: [ PASS ] Signature is valid.
[1579528437.427]: [ INFO ] sha1sum digest of guix-binary-1.0.1.x86_64-linux.tar.xz:
8288422fde6a6d4ee257355c21ab9447ae9736cf  guix-binary-1.0.1.x86_64-linux.tar.xz
[1579528437.580]: [ INFO ] Downloading Guix install script 'guix-install.sh'
guix-install.sh                         100%[==================================================>]  13.68K  --.-KB/s    in 0s      
[1579528438.299]: [ PASS ] download completed.
[1579528438.304]: [ INFO ] sha1sum digest of guix-install.sh
4402af0b8c130b1cabf7fb5e68ec3183a02633b0  guix-install.sh
[1579528438.308]: [ INFO ] sha1sum digest of /home/bokr/BS/bs20200119_2359/get-guix-ver.sh
6926ea98230514b731c4ebe9edae8c9a5e01c0a9  /home/bokr/BS/bs20200119_2359/get-guix-ver.sh
[1579528438.311]: [ INFO ] This is last command in modified guix-install.sh script.
[05:53 ~/bs]$ 
--8<---------------cut here---------------end--------------->8---

Well, I hacked in some extra stuff, but I think it would be nice to give the script
a -n --dry-run option, and print the tarball dates along with a last-commit date, etc.
to show automatically what I did manually above.

Also, it the script [1] under git version control? Perhaps as a verbatim texi node
in guix info?

WDYT?

BTW I think guix use via binary installs on "foreign distros" will grow to a majority.
Especially if those who want to try it can pre-check with a dry run that can be run
as plain user and which outputs good warnings as appropriate.

I am now on PureOS on a Librem13v4, which is based on Debian apt packaging,
limited IIUC to their vetted repo based on Debian upstream.

So I wonder what I have done to my trust tree by running the binary install script.
I hate to think. There sure are a lot of committers who I don't know from Adam ;-/

> Here’s my understanding of what happened:
> 
>   1. You’re running guix-daemon 1.0.1, which lacks the fix for
>      <https://bugs.gnu.org/37744> (aka. CVE-2019-18192).
> 
>   2. As “mwette”, you ran ‘guix pull’ and obtained a new ‘guix’, which
>      you then used in ‘guix install hello’ above.
> 
>   3. That new Guix contains the new profile locking mechanism that threw
>      the exception we see above.  That exception is because it failed to
>      create the lock file (“No such file or directory”), and that in
>      turn is because /var/guix/profiles/per-user/mwette didn’t exist
>      yet.
> 
>      /…/per-user/mwette didn’t exist because it was the first time you
>      ran ‘guix install’ as “mwette”, and because guix-daemon lacks the
>      fix mentioned above that would create upon first connection.
> 
> QED ■  :-)
> 
> Thanks for your report!
> 
> Ludo’.
> 

-- 
Regards,
Bengt Richter