Re: Can I boot single OS with different parameters?

[Voronkov Konstantin]

thanks a lot for your help.

Konstantin

----- Original Message -----
From: "Alban Crequy" <address@hidden>
To: "Voronkov Konstantin" <address@hidden>
Cc: <address@hidden>
Sent: Wednesday, February 16, 2005 6:53 PM
Subject: Re: Can I boot single OS with different parameters?


> Le mardi 15 février 2005 à 12:40, Voronkov Konstantin a écrit:
> > Hello, All!
> >
> > We need to load different setups depending on OS selected in GRUB
> > while booting. We need to load the same OS but make some
pre-configuration
> > so that OS runs initial script depending on OS selected in GRUB. Is it
> > possible?
> > Would you be so kind to provide information how to do that.
>
> I can't give a general answer, but I will explain what I do for the
> GNU/Linux OS (the following is Linux specific):
>
> I use several stanza in the menu.lst config file with only one difference:
>
> kernel (hd0,0)/boot/vmlinuz ... myparam=1
> kernel (hd0,0)/boot/vmlinuz ... myparam=2
>
> I use a non-standard parameter: "myparam".
>
> When my Linux boots, I parse the /proc/cmdline file from some rc files
> in order to get the variable "myparam". Example (with bash):
>
> |for word in $(cat /proc/cmdline) ; do
> |        case $word in
> |                myparam=*)
> |                eval $word
> |                ;;
> |        esac
> |done
> |echo "myparam = ${myparam}"
>
> The Linux' "init" parameter may also be useful (depending on what you
> want to do), see doc in your linux kernel sources:
> /usr/src/linux/Documentation/kernel-parameters.txt
>
>
> > In mine opinion I have next scenario. E.g. GRUB modifies some file on
load
> > on hard disk depending on OS selection. Is it possible? Maybe there is
> > other
> > way to perform this?
>
> Grub is able to modify one file on the hard disk depending on OS
> selection. See the Grub's documentation from the CVS and look for the
> "savedefault" feature. I don't know if it is a good idea to use this.
>
> If you use this:
>
> title MyOS
> kernel ...
> savedefault 1
>
> Grub will save the number "1" in the file "default", located in the same
> directory and the same partition than your file menu.lst.
>
> Warning: The aim of the savedefault command is NOT to store anything in
> the file "default". If you use the command "default saved", my ugly tip
> will have some side effects... ;) If you use Linux, I advice you not to
> use this and to add a "myparam" variable in the cmdline.
>
> --
> Alban
>
>
>
>
>