From owner-freebsd-hackers  Fri May  4  8:48:56 2001
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Date: Fri, 4 May 2001 11:48:50 -0400
From: Brian Dean <bsd@bsdhome.com>
To: Rick Duvall <maillist@coastsight.com>
Cc: freebsd-hackers@FreeBSD.ORG
Subject: Re: Set up loader to boot cd
Message-ID: <20010504114850.A18459@vger.bsdhome.com>
References: <Pine.BSF.4.21.0104301128100.70711-100000@ns1.coastsight.com>
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In-Reply-To: <Pine.BSF.4.21.0104301128100.70711-100000@ns1.coastsight.com>; from maillist@coastsight.com on Mon, Apr 30, 2001 at 11:31:22AM -0700
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On Mon, Apr 30, 2001 at 11:31:22AM -0700, Rick Duvall wrote:

> I am trying to make a custom boot CD for FreeBSD.  I got it to the point
> to where the CD will boot, load the kernel, but that's as far as it
> get's.  It does when it get's to the part where it wants to mount the root
> devicd.  It tried to access the floppy drive.
> 
> So, do I need to vnconfig the boot.flp and put my own custom loader in it
> or what?  I don't want to be puting -C in every time I boot.  Also, when I
> put in -C, the kernel will load, but then can't find the CD device....
> 
> Any ideas would be appreciated.  Maybe step by step instructions on making
> a custom bootable live cd would be nice.

I've had good success with the following which is a /bin/sh shell
function.  Use it as follows:

	% dofdboot /scratch/cdroot

where /scratch/cdroot could be produced by:

	% make installkernel installworld DESTDIR=/scratch/cdroot

After all that, specify boot/boot.fd as your ISO eltorito boot image
file.

Enjoy!
-Brian
-- 
Brian Dean
bsd@FreeBSD.org
bsd@bsdhome.com


dofdboot () {
  DESTDIR="$1"
  echo "DOFDBOOT: DESTDIR=$DESTDIR"
  echo "Generating 2.88 MB boot floppy image"
  KERNELIMG=${DESTDIR}/kernel

  umount /mnt > /dev/null 2>&1
  vnconfig -u /dev/vn0 > /dev/null 2>&1

  echo "Initialize boot floppy image"
  dd if=/dev/zero of=${DESTDIR}/boot/boot.fd bs=1024 count=2880
  vnconfig -s labels -c /dev/vn0 ${DESTDIR}/boot/boot.fd
  disklabel -Brw /dev/vn0c minimum2
  newfs -o space -T minimum2 /dev/vn0c
  mount /dev/vn0c /mnt

  echo "Copy kernel from ${KERNELIMG} to the boot floppy"
  cp -p ${KERNELIMG} /mnt
  mkdir /mnt/boot
  echo "Copy boot1, boot2, and loader to boot floppy"
  (cd ${DESTDIR}/boot && cp -p boot1 boot2 loader /mnt/boot)
  echo "Create boot.config"
  echo "-P" > /mnt/boot.config
  echo "Create loader.rc"
  cat <<EOF > /mnt/boot/loader.rc
echo "BSD CDROM ROOT IMAGE"
echo "LOADING KERNEL"
load /kernel
boot -C
EOF

  umount /mnt
}



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