Re: Command extension suggestions

[Bean <bean123@126.com>]

On Thu, Jun 14, 2007 at 08:08:09AM +0200, Robert Millan wrote:
> On Thu, Jun 14, 2007 at 11:46:49AM +0800, Bean wrote:
> > These ideas are mostly from grub4dos, I think they can be useful in GRUB2.
> > 
> > 1. cat
> > 
> > In addition to the current function, cat can also generate hexadecimal dump, 
> > and it can optionally choose the range of bytes to display. For example:
> > 
> > cat [--hex] [--skip=S] [--length=L] FILE
> 
> Wouldn't it be more consistent to call it:
> 
>   od [-j|--skip-bytes=S] [-N|--read-bytes=L] FILE
> 

Good idea.

> > Sometimes it's useful to dump the content of physical memory, it can be
> > implemented with a special option --mem. For example,
> > 
> > cat [--mem] [--skip=S] [--length=L] base_address
> > 
> > It can also be implemented with virtual device (md). For example,
> > 
> > cat --hex (md)+2
> 
> That sounds much cleaner IMHO.  But IIRC (md) is already in use by the
> RAID/LVM stuff ?
> 

Maybe (mem) ?

Also, I don't know if GRUB2 kernel support initrd. You can start grub4dos
like this:

kernel /grub.exe
initrd /aa.img

Inside grub4dos, the initrd can be access using (rd). It would be nice if
grub2 support this kind of usage.

> > 2. find
> > 
> > Find command is missing in GRUB2. It's used to find the device which contains
> > a certain file.
> > 
> > find [--set=var_name] FILENAME
> 
> We have this already, only with different name:
> 
>   search --set /file
> 
> (root is implicit, but it can be overriden)

Thanks for pointing out.

-- 
Bean <bean123@126.com>