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

[Simen Endsjø]

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?
>