Hello Dan,Thank you for your answer. I didn't find my solution but I've learn
a couple of things.And yes the idea is to get the right parameters to rebuild
the iso as it was and that can boot the same way.
Le Mercredi 28 octobre 2015 23h11, dan mclaughlin
<[email protected]> a écrit :
On Wed, 28 Oct 2015 07:45:05 +0000 (UTC) Mik J <[email protected]> wrote:
> Hello everyone,
> I asked this question on another list a long time ago.
> * I would like to mount an iso in order to add some files# ls -l /mnt
> drwxr-xr-x 2 root wheel  512 May 3 15:31 iso# vnconfig svnd0
Image.iso
> # mount_cd9660 -o rw /dev/svnd0c /mnt/iso
> After the mount, it's read only# ls -l /mnt
> dr-xr-xr-x 1 root wheel  512 May 3 15:31 iso
> The person who replied told me it was normal, cd9660 are always mounted as
> read only and suggested that I have to remake the iso
> * If that is correct, I would like to know how would I be able to remake
> this iso, and particularly keeping the boot options.
> When I want to make an OpenBSD iso I use -b i386/floppy58c.fs -c
boot.catalog
> I would like to know how can I find which -b and -c options have been used
by
> the person who made the iso in order to use it when I want to rebuild this
iso
> Thanks
>
you must be using a pretty old version of OpenBSD if you are using svnd0 (it
is
just vnd0 now).
i don't know of a way to mount an iso9660 filesystem r/w either (makes sense
as it is for read-only media), but you can mount the iso image as you did
above, and then copy it into a new directory.
# mkdir newiso
# (cd /mnt/iso && tar cf - *) | tar xpf - -C newiso
now you can modify the version in the newiso directory.
i don't know how to get the parameters used on any random image, but the
command used to create the install cd image is:
mkhybrid -a -R -T -L -l -d -D -N -o /usr/src/distrib/i386/cdfs/obj/cd58.iso -v
-v -A "OpenBSD 5.8 i386 bootonly CD" -P "Copyright (c) `date +%Y` Theo de
Raadt, The OpenBSD project"Â -p "Theo de Raadt <[email protected]>"Â -V
"OpenBSD/i386Â Â 5.8 boot-only CD"Â -b 5.8/i386/cdbr -c
5.8/i386/boot.catalog /usr/src/distrib/i386/cdfs/obj/cd-dir
but i don't think it matters much which -b and -c options were used
originally. when you recreate the image you have to redo that anyway.
i'm not sure of your use of -b for a cd however. according to mkhybrid(8):
 This will work, for example, if the boot image is a LILO-based boot
floppy.
but i've never tried that. i use cdbr as in the example above (which is from
the release(8) process, used to make the official releases). you can find
cdbr
as /usr/mdec/cdbr, and can copy it to the newiso dir if you don't already
have
a copy there.
