Making Customized Bootable FreeBSD

Olivier Regnier oregnier at steelbox.org
Mon Mar 26 19:38:55 UTC 2007


Kevin Kinsey a écrit :
> Olivier Regnier wrote:
>> Hello,
>>
>> After 3 hours, i made my bootable FreeBSD CD/Floppies. Actually, i 
>> finished my install.cfg but i have a problem because i don't 
>> understand the final step :
>>
>
> I'm not sure I do either, but I'm willing to attempt to help.  Bearing
> in mind IANAE, I *think* this is what you're seeing:
>
>> # mkdir /img
>> # cd $CHROOTDIR/R/cdrom/disk1/floppies
>
> Should be self-explanatory; $CHROOTDIR should be set in the 
> environment if you are doing "make release"....
>
>> /* Get mfsroot.gz from mfsroot.flp */
>> # vnconfig /dev/vn0c mfsroot.flp
>> # mount /dev/vn0c /img
>> # cp /img/mfsroot.gz .
>> # umount /img
>> # vnconfig -u /dev/vn0c
>
> Create a "memory disk" from the floppy image "mfsroot.flp",
> mount it, copy the "mfsroot.gz" to the current working dir,
> unmount it and destroy the "memory disk".
>
>> /* Unzip mfsroot.gz to get mfsroot */
>> # gunzip mfsroot.gz
>
> Obvious, I hope.
>
>> /* Put your config file in mfsroot */
>> # vnconfig /dev/vn0c mfsroot
>> # mount /dev/vn0c /img
>> # cp install.cfg /img/.
>> # umount /img
>> # vnconfig -u /dev/vn0c
>> /* (If you 'gzip mfsroot' here, you can use that for bootable 
>> mfsroot.flp for floppies) */
>>
>
> Mount the unzipped "mfsroot" file in a memory disk,
> cp your install.cfg to this memory disk, unmount it
> and destroy the memory disk.
>
> (Note of concern ... I don't see this getting moved
> back to anywhere were it will do some good before moving
> to the next step.  Where did you get these instructions?)
>
>> /* Put mfsroot in kernel so that it will read it when boot time */
>> # vnconfig /dev/vn0c boot.flp
>> # mount /dev/vn0c /img
>> # cp /img/kernel.gz .
>> # gunzip kernel.gz
>> # write_mfs_in_kernel -f kernel mfsroot
>> /* write_mfs_in_kernel can be found at /usr/src/release.  Compile it 
>> if you haven't. */
>>
>> # gzip kernel
>> # cp kernel.gz /img/.
>> # umount /img
>> # vnconfig -u /dev/vn0c
>>
>
> Mount the "boot.flp" image in a memory disk, grab the kernel,
> unzip it, add the altered "mfsroot" to the kernel using the
> write_mfs_in_kernel program/script, zip up the new kernel, copy it to 
> the image and unmount said image.
>
> I'm concerned though about this documentation; for one thing
> vnconfig is deprecated (except for 4.X releases, which are, uh,
> deprecated<?>), and  "write_mfs_in_kernel" was "nuked" from CVS **8 
> years ago**  by the venerable jkh himself, so I have to wonder, "Where 
> did this 'how-to' come from?"
>
> You may need someone more familiar with the modern RELENG
> system to help with this....
>
> Kevin Kinsey
Thank you for your answer. I found these instructions at 
http://www.sfc.wide.ad.jp/%7Ewatari/FreeBSD/boot.html



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