On Wed, Jul 13, 2016 at 01:52:13PM +0000, Glen Barber wrote: > 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 with > > unique label and then use GEOM_LABEL to easily find relevant file system on > > boot regardless of the physical device name. > > > > mkuzip -dL -S -s 65536 -o ${UZPFILE} ${UFSFILE} > > mkisofs -b boot/${CDBOOT} -no-emul-boot -r -o ${ISOFILE} ${CDIR} > > eval $(stat -s ${UZPFILE}) > > UZPSIZE=$((st_size + 2048 - (st_size % 2048))) > > truncate -s ${UZPSIZE} ${UZPFILE} > > eval $(stat -s ${ISOFILE}) > > ISOSIZE=${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} > > > > 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. > For now, I think ignore my reply. I think I now see what you're doing. Glen
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