xorriso : FAILURE : Not a known command

[Jakub Jermar]

Hi Leslie,

On 05/31/2017 05:42 AM, Leslie Zhai wrote:
> When I Running hello.iso http://os.inf.tu-dresden.de/fiasco/build.html
> via *make grub2iso E=hello MODULE_SEARCH_PATH=/path/to/fiasco-build-dir
> *it failed to generate ISO, xorriso thrown such error:
> 
> xorriso : FAILURE : Not a known command:  '-f'
> 
> xorriso : aborting : -abort_on 'FAILURE' encountered 'FAILURE'
> Failed to create ISO at tool/lib/L4/Grub.pm line 123.
> Makefile:598: recipe for target 'grub2iso' failed

I was able to workaround this issue by dropping the test for scriptness
of grub[2]-mkrescue:

   my $opt = '';
   open(A, $mkr) && do {
-    $opt = " -as mkisofs" if <A> =~ /^#! +\/.+sh/;
+    $opt = " -as mkisofs";
     close A;
   };
   my $cmd = "$mkr --output=\"$isofilename\" $dir ".

The test seems to draw wrong conclusions at least on Fedora 25. The fix
works fine also on Ubuntu 16.04, besides Fedora.

> so I simply changed the option:
> 
> 
> Index: tool/lib/L4/Grub.pm
> ===================================================================
> --- tool/lib/L4/Grub.pm (revision 72)
> +++ tool/lib/L4/Grub.pm (working copy)
> @@ -116,7 +116,7 @@
>      close A;
>    };
>    my $cmd = "$mkr --output=\"$isofilename\" $dir ".
> -            join(' ', @morefiles)." --$opt -f";
> +            join(' ', @morefiles)." --$opt -follow default";
>    system("$cmd");
>    die "Failed to create ISO" if $?;
>    # grub-mkrescue does not propagate internal tool errors
> 
> 
> please review my patch, thanks a lot!

The concern here would be if "-follow default" has the same semantics as
"-as mkisofs -f". It would be also useful to know what system are you
running this on.

Best,
Jakub