Petitboot quote parsing

[Samuel Mendoza-Jonas]

On Fri, 2016-09-16 at 15:10 -0300, Guilherme G. Piccoli wrote:
> Hi, I have a question about quote parsing.
> 
> I tried to add a dynamic debug entry in my grub.cfg to allow some 
> debugging during kernel boot, but Petitboot isn't parsing the necessary 
> quotes in my dyndbg parameter on cmdline, no matter how hard I try.
> 
> I added the following to my Ubuntu's /etc/default/grub.cfg:
> dyndbg=\"file arch/powerpc/kernel/pci* +p\"
> 
> Then, grub-mkconfig generated my grub.cfg and added the following (it 
> parsed the escape):
> dyndbg="file arch/powerpc/kernel/pci* +p"
> 
> Petitboot however, when parsed that grub.cfg generated a boot cmdline 
> with: dyndbg=file arch/powerpc/kernel/pci* +p
> Basically it removed the quotes.
> 
> 
> Then, I tried different: I manually set my grub.cfg with escapes, so it 
> showed as: dyndbg=\"file arch/powerpc/kernel/pci* +p\"
> I expected that this way Petitboot would parse the escape, keeping the 
> quotes. Instead, it just didn't show any option on UI, so I needed to 
> manually kexec the kernel from mounted partition heheh.
> Petitboot mounted the partition fine, but seemed unable to parse the 
> "escaped" quotes.
> 
> 
> Now, my question is how can I achieve this quote insertion on cmdline 
> provided from Petitboot to Ubuntu kernel? Any hint will be much appreciated.
> Thanks in advance,
> 

Hi Guilherme,

At first glance I think you have hit a bit of a corner-case of
Petitboot's lexer. I'll look into this and see if we need an update.

Thanks,
Sam

> 
> 
> 
> Guilherme
> 
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