Re: Software running in a container fails when using fontconfig?

[Edouard Klein]

¯⁠\⁠_⁠ʘ⁠‿⁠ʘ⁠_⁠/⁠¯   https://xkcd.com/763/

If it works, it works ;o)


Simen Endsjø <contact@simendsjo.me> writes:

> Thanks, but it didn't quite work. It did however trigger a state where I can 
> avoid the bug.
> Instead of the embedded html showing directly, I get a warning stating that it
> is disabled because of security. I can choose to disable the sandbox, and the
> application restarts, showing the html, crashing again. So I can just not
> disable the sandbox and avoid triggering the bug.
>
> On Fri, Nov 15, 2024, at 11:17, Edouard Klein wrote:
>> Hi,
>>
>> This may miss the mark wildly, but I remember having trouble with
>> fontconfig in a container a few months ago and solving it with
>> --emulate-fhs  maybe this is worth a try.
>>
>> Cheers,
>>
>> Edouard.
>> Simen Endsjø <contact@simendsjo.me> writes:
>>
>> > Hi, I'm packaging a piece of software which crashes when launching
>> > chromium embedded framework.
>> >
>> > The error is
>> >   Fontconfig error: Cannot load default config file: No such file: (null)
>> >
>> > I found a similar issue for Nix which suggests the error is caused by
>> > fontconfig not being installed globally and suggests a patch:
>> > https://github.com/NixOS/nixpkgs/issues/176081#issuecomment-1145903568
>> >
>> > I tried creating a symlink at /etc/fonts/fonts.conf, but while I get
>> > further, it still crashes.
>> >
>> >   sudo ln -s ~/.config/fontconfig/fonts.conf /etc/fonts/fonts.conf
>> >
>> >   Fontconfig warning: no <cachedir> elements found. Check configuration.
>> >   Fontconfig warning: adding <cachedir>/var/cache/fontconfig</cachedir>
>> >   Fontconfig warning: adding <cachedir prefix="xdg">fontconfig</cachedir>
>> >   Trace/breakpoint trap
>> >
>> > /var/cache/fontconfig is on a read-only filesystem, so I cannot
>> > experiment with adding it there.
>> >
>> > I tried adding all fonts and fontconfig to my system configuration, but
>> > this didn't generate /etc/fonts/fonts.conf nor /var/cache/fontconfig/*.
>> >
>> > Unfortunately, I haven't been able to test the Nix patch as my naive `-L
>> > ~/code/guix` fails to compile various modules.
>> >
>> > Any input before I spent a lot of time trying to get this Nix patch 
>> > working?
>>