Date: Wed, 13 Jul 2016 13:52:13 +0000 From: Glen Barber <gjb@FreeBSD.org> To: Maxim Sobolev <sobomax@freebsd.org> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: FreeBSD-11.0-BETA1-amd64-disc1.iso is too big for my 700MB CD-r Message-ID: <20160713135213.GH1520@FreeBSD.org> In-Reply-To: <CAH7qZfv7wrCK7xORCyP4x4wP0T_9BuhJiyoZ%2B0O-cwKfR7A=Qw@mail.gmail.com> References: <op.ykgfddt2kndu52@eveline> <CAG6CVpW3rGEoqTcQodY%2BWVPVsTdxUd6OsB%2BzAq1k7Y-vUrdaSg@mail.gmail.com> <CAOtMX2gAwr_OPgy=FNYjc_wDKafV0DmXPMBxnGOdacctmdtgmw@mail.gmail.com> <20160711214144.GA7465@FreeBSD.org> <20160711214604.GG20831@zxy.spb.ru> <4a7eeee3c2737e9abcb6ba2557630d87@ultimatedns.net> <16f749e5-ca72-de79-651f-d50f9c42309e@freebsd.org> <7d0bd071cfbc78fcb9956e47f186e90b@ultimatedns.net> <CAH7qZfv7wrCK7xORCyP4x4wP0T_9BuhJiyoZ%2B0O-cwKfR7A=Qw@mail.gmail.com>
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On Mon, Jul 11, 2016 at 05:23:32PM -0700, Maxim Sobolev wrote:
> P.S. Just in case if somebody wants to integrate this method into FreeBSD
> liveCD build, we do a bit of trick there by making normal ISO9660 file
> system with compressed kernel and relevant boot pieces and then also
> sticking in BSD label on the same disk image. It turns out ISO9660 and BSD
> disklabel structures do not overlap, so it works nicely since 2005 or
> so. Then we append UFS image compressed with mkuzip at the end of it.
> Resulting image can be used just as any ISO would. We also cook up UFS wi=
th
> unique label and then use GEOM_LABEL to easily find relevant file system =
on
> boot regardless of the physical device name.
>=20
> mkuzip -dL -S -s 65536 -o ${UZPFILE} ${UFSFILE}
> mkisofs -b boot/${CDBOOT} -no-emul-boot -r -o ${ISOFILE} ${CDIR}
> eval $(stat -s ${UZPFILE})
> UZPSIZE=3D$((st_size + 2048 - (st_size % 2048)))
> truncate -s ${UZPSIZE} ${UZPFILE}
> eval $(stat -s ${ISOFILE})
> ISOSIZE=3D${st_size}
> echo "bytes/sector: 2048" >
> ${TDIR}/label.txt
> echo "sectors/unit: $(((UZPSIZE + ISOSIZE) / 2048))" >>
> ${TDIR}/label.txt
> echo "a: $((UZPSIZE / 2048)) $((ISOSIZE / 2048)) unused" >>
> ${TDIR}/label.txt
> echo "c: $(((UZPSIZE + ISOSIZE) / 2048)) 0 unused" >>
> ${TDIR}/label.txt
> truncate -s $((ISOSIZE + UZPSIZE)) ${ISOFILE}
> disklabel -A -R -f ${ISOFILE} ${TDIR}/label.txt
> truncate -s ${ISOSIZE} ${ISOFILE}
> cat ${UZPFILE} >> ${ISOFILE}
>=20
I'm very interested in implementing this, provided it solves the
disc1.iso size issue. Could you provide a bit explanation on what the
variables above represent? At the moment, I'm having trouble parsing
the file paths and input/output paths.
Glen
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