bug#34402: Inferior channel (I believe 'inferior-for-channels' function specifically) sometimes fails

[Ludovic Courtès]

Hi,

<address@hidden> skribis:

> It looks like line 16205 (at the bottom pretty much) shows that a permissions 
> issue is the culprit:
>
> openat(AT_FDCWD, 
> "/home/itsme/.cache/guix/checkouts/pjmkglp4t7znuugeurpurzikxq3tnlaywmisyr27shj7apsnalwq/.git/FETCH_HEAD",
>  O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = -1 EACCES (Permission denied)
>
> That file, along with  is owned by root and is in the root group, and 
> permissions are set to `-rw-r--r--`.
>
> It looks like this is caused by me running a guix command as root, with `sudo 
> -E` (the -E is probably why it's modifying ownership of files in my user's 
> guix cache directory), that checks out the git commit (I assume since it's 
> only changing the ownership on those two files, the rest in that directory 
> are owned by my user).
>
> Changing the owner of that file back to my user has made the error go away 
> when running `guix package -n -m example-manifest.scm` - and if i then run 
> that command again with 'sudo -E', the ownership of those files is changed 
> back to root.

Great that you found out!

Commits 70a50305c495ca96fdec3d31e7e7972cfc54f8ee and
1d8b10d00f0c242bc5ce9540737af3d3f24a05c0 fix error reporting in this
case: you now get an error message mentioning Git and the invalid
permissions on a file in ~/.cache/guix/checkouts.

Thanks,
Ludo'.