[File] Compile error with seccomp disabled, landlock enabled

[Christos Zoulas]

On 2026-05-14 1:57 pm, Christoph Biedl wrote:
> Hello,
> 
> my test builds of file are done with seccomp disabled, for reasons I
> forgot, so
> 
>     ./configure --disable-libseccomp
> 
> Since the introduction of landlock support a few commits ago, this 
> fails
> with:
> 
> ```
> file.c:371:13: error: ‘sandbox’ undeclared (first use in this function)
>   371 |         if (sandbox && enable_landlock(flags, action) == -1)
>       |             ^~~~~~~
> ```
> 
> Now I'm not sure about the proper way to address this but at least this
> change made the compile pass again:
> 
> ```
> --- a/src/file.c
> +++ b/src/file.c
> @@ -199,7 +199,7 @@ main(int argc, char *argv[])
>         size_t i, j, wid, nw;
>         int action = 0, didsomefiles = 0, errflg = 0;
>         int flags = 0, e = 0;
> -#ifdef HAVE_LIBSECCOMP
> +#if defined(HAVE_LIBSECCOMP) || defined(HAVE_LINUX_LANDLOCK_H)
>         int sandbox = 1;
>  #endif
>         struct magic_set *magic = NULL;
> ```
> 
> Thoughts?

Fixed, thanks!

christos