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#32478
pcscd service activation causes boot failure
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Your bug report
#32478: pcscd service activation causes boot failure
which was filed against the guix package, has been closed.
The explanation is attached below, along with your original report.
If you require more details, please reply to 32478 <at> debbugs.gnu.org.
--
32478: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=32478
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems
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Hi Ludo and Arun,
ludo <at> gnu.org (Ludovic Courtès) writes:
>> ERROR: In procedure dynamic-func:
>> In procedure dynamic-pointer: Symbol not found: strverscmp
>
> This is because (guix utils) pulls in lots of things that are not really
> meant to be used on the “build side” (a misnomer in this case, but you
> see what I mean ;-)). Here, it assumes that dlopen support is available
> but it’s not because the activation snippet runs on the
> statically-linked Guile.
That makes sense. I keep forgetting about this. :-) Thank you for
reminding me!
> I think “TODO: Deduplicate” would be enough as a comment, or at least
> something more concise like “XXX: We cannot use (guix utils) because it
> requires a dynamically-linked Guile, hence the duplicate
> ‘switch-symlinks’.” I leave it up to you!
Yes, I agree. I'll simplify the comment. I included the long comment
mainly in the hopes that somebody would be able to help me understand
why it wasn't working.
Arun Isaac <arunisaac <at> systemreboot.net> writes:
>> Commit de30205ba0f63eb987097a9f47b6e4fd38cd9044 added a pcscd service
>> (hooray!). However, its activation procedure doesn't always work. The
>> system test passes, and the activation procedure works the first time
>> you boot, but if you reboot, it will fail because the symlink it creates
>> already exists. The attached patch fixes the problem.
>
> Thanks for catching and fixing this! I am still in the process of
> building and testing your patch. I ran out of memory and had to `guix
> gc' and rebuild again. As you said, it takes a while. But, your patch
> LGTM. Please go ahead and push to master at your discretion, after
> addressing Ludo's feedback.
OK! I've rewritten the comment as Ludo suggested and committed this to
master as 6fb6ac6857df31c55a640eead2a5f79edd7dab14.
Now, I'll close this bug report.
--
Chris
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Hi,
Commit de30205ba0f63eb987097a9f47b6e4fd38cd9044 added a pcscd service
(hooray!). However, its activation procedure doesn't always work. The
system test passes, and the activation procedure works the first time
you boot, but if you reboot, it will fail because the symlink it creates
already exists. The attached patch fixes the problem.
To reproduce the bug, use the attached operating system configuration
file (bare-bones.scm), and run:
guix system vm-image bare-bones.scm
This takes a long time to finish (up to a few hours, depending on your
system). Once it's done, copy the image out of the store:
cp $the_store_path /tmp/qemu-image
Then run it:
sudo qemu-system-x86_64 -smp cpus=1 -net user -net nic,model=virtio -enable-kvm -m 2048 /tmp/qemu-image
Observe how the VM boots successfully. Now log in as root (no password)
and reboot. Observe that the boot process fails now because the symlink
created by the pcscd activation service already exists.
The attached patch fixes the issue by using an idempotent procedure to
create the symlink. If there are no objections, I'll push the patch to
master about 24 hours from now. There is a fairly long comment in my
patch because although I wanted to re-use the switch-symlinks procedure
from (guix utils), I couldn't figure out how to do it. Ideas regarding
this are welcome! To be specific, I tried to use (guix utils), but then
I got the following error message at boot time (see my comment for more
information):
--8<---------------cut here---------------start------------->8---
loading '/gnu/store/f4ng1dlpm7q74vssbb049vpf2gvw3n3r-system/boot'...
[ 2.175072] random: fast init done
making '/gnu/store/f4ng1dlpm7q74vssbb049vpf2gvw3n3r-system' the current system..
.
setting up setuid programs in '/run/setuid-programs'...
populating /etc from /gnu/store/n6cwz1hlmjylva2xrv61njl68g6c8k5l-etc...
usermod: no changes
usermod: no changes
usermod: no changes
ERROR: In procedure dynamic-func:
In procedure dynamic-pointer: Symbol not found: strverscmp
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
GNU Guile 2.2.3
Copyright (C) 1995-2017 Free Software Foundation, Inc.
Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.
Enter `,help' for help.
scheme@(guix utils)> ,bt
In gnu/build/linux-boot.scm:
530:13 22 (_)
In unknown file:
21 (primitive-load "/gnu/store/f4ng1dlpm7q74vssbb049vpf2gv·")
In ice-9/eval.scm:
619:8 20 (_ #f)
In unknown file:
19 (primitive-load "/gnu/store/b6yg0pkp835a3zky9sj53yyjxac·")
In ice-9/boot-9.scm:
260:13 18 (for-each #<procedure primitive-load (_)> _)
In unknown file:
17 (primitive-load "/gnu/store/v42zaw2hjwxy5wnd0dwa6j245nr·")
In ice-9/eval.scm:
721:20 16 (primitive-eval (begin (use-modules (guix build #) #) ·))
In ice-9/psyntax.scm:
1235:36 15 (expand-top-sequence ((begin (use-modules (# # ·) ·) ·)) ·)
1182:24 14 (parse _ (("placeholder" placeholder)) ((top) #(# # ·)) ·)
1182:24 13 (parse _ (("placeholder" placeholder)) ((top) #(# # ·)) ·)
285:10 12 (parse _ (("placeholder" placeholder)) (()) _ c&e (eval) ·)
In ice-9/boot-9.scm:
3365:20 11 (process-use-modules _)
222:29 10 (map1 (((guix build utils)) ((guix utils))))
222:17 9 (map1 (((guix utils))))
3366:31 8 (_ ((guix utils)))
2788:17 7 (resolve-interface (guix utils) #:select _ #:hide _ # _ ·)
2714:10 6 (_ (guix utils) _ _ #:ensure _)
2982:16 5 (try-module-autoload _ _)
2312:4 4 (save-module-excursion #<procedure 2de04e0 at ice-9/boo·>)
3002:22 3 (_)
In unknown file:
2 (primitive-load-path "guix/utils" #<procedure 2abb480 a·>)
In guix/utils.scm:
485:24 1 (_)
In unknown file:
0 (dynamic-func "strverscmp" #<dynamic-object #f>)
scheme@(guix utils)> [ 53.048203] random: crng init done
--8<---------------cut here---------------end--------------->8---
To be clear, the above stack trace is NOT related to the bug I am
reporting. It's just a different problem that made it difficult to
re-use switch-symlinks from (guix utils), which is why in my fix I
decided to just copy the switch-symlinks definition verbatim.
--
Chris
[bare-bones.scm (application/octet-stream, attachment)]
[0001-gnu-services-Fix-pcscd-activation-bug.patch (text/x-patch, attachment)]
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This bug report was last modified 6 years and 358 days ago.
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