Passing arguments to initrd's 'init' script.

[Ryan Lynch]

Is it possible to pass arguments from the kernel (boot) command line to the
'init' script located in my initrd?  If so, is there a best-practice method
for doing this?

Looking at the non-initrd system init script '/etc/event.d/rcS', I see that
it just reads '/proc/cmdline' and looks for relevent tokens:

{{{
for t in $(cat /proc/cmdline); do
    case $t in
        -s|single|S|s) runlevel="S" ;;
        [1-9])       runlevel="$t" ;;
    esac
done
}}}

I assume that the initrd's 'init' script has access to this same
information, at least after it mounts '/proc'.  Is there some reason not to
use this from the initrd, or is it acceptable?

This is related to a larger question I have about 'mkinitrd' and the 'init'
script:  Why does 'mkinitrd' hard-code the name of the LVM root device,
among other things, instead of reading it from the 'root=' parameter on the
boot command line?  Wouldn't it make more sense to dynamically pick up the
root device on each boot, using a method similar to the 'rcS' script, above?

-Ryan
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