[syslinux] isolinux.cfg location?

[Nicolas Bigaouette]

Thanx for the feedback and the clarification.

I tough of "merging" config files, but it's not quite the way I see the
CD I'm creating. I'm booting that cd with CDShell, witch can load
isolinux. I want to make a choice in CDShell of "Insert" or "Damn Small
Linux". That choice would bring the same screen as if the computer was
booted with the respective Live CD. Right now I'm calling CDShell's
implementation of isolinux with the default parameters of those livecd.
But I'd like to have the isolinux screen with the "boot:" prompt, the
live cd's logo, the boot options, etc. I'm limited right now to just the
default options.

It seems possible to pass some options to isolinux as of
http://cdshell.org/doc/cmdref.html#isolinux. Even if it says that the
arguments would be interpreted by isolinux as if entered at the "boot:"
prompt, it still seems possible for isolinux to "receive information"
from CDShell or another boot loader booted before isolinux.

If syslinux relies on a some variables being initialized at load time,
it could relies also on some other variables to get the location of the
configuration files. I don't really understand what you meant by "they
would have to be reset before a new config file can be loaded"... I
didn't meant "load a different config file from an already loaded
isolinux" if this is what you tought I wanted...

Thanx

Nicolas



H. Peter Anvin wrote:

> Nazo wrote:
>
>>
>> I think the issue is as simple as that it gets more complicated to add
>> all the checking that would be necessary to figure out which to use. 
>> That part of isolinux has to be pretty tiny from what I understand.
>>
>> If you're going to combine multiple bootable discs into one, what you
>> need to do is create one single configuration rather than having
>> multiple configurations.  In other words, basically just combine the
>> multiple isolinux.cfg files into the one.  Usually you can just copy
>> and paste the label, kernel, and append lines from one directly to the
>> other, then create some basic settings like which to boot by default.
>>
>
> It's more fundamental than that.  If you're going to have multiple 
> config files, you need some way of selecting between them.
>
> This is something that has been discussed on this list before (usually 
> in the context of pxelinux, but the problem as far as isolinux is 
> concerned is identical); it is, however, something that isn't entirely 
> trivial to do: currently syslinux relies on some variables being 
> initialized at load time, and they would have to be reset before a new 
> config file can be loaded.  That's mostly just a cleanup effort, but 
> one that will take a bit of time to implement.
>
>     -hpa
>