build-cd-image

#!/bin/bash

[ $# != 2 ] && echo missing parameters && exit 1

out=tmp/cd
grubcfg=$out/boot/grub/grub.cfg

mkdir $out

vmlinuzpath=$(xorriso -dev $1 -sh_style_result on -find / -type f -name vmlinuz 2>/dev/null | cut -f2- -d '/')

if [ "vmlinuzpath" != "" ]; then
   # Debian, newer Ubuntu
   kpath=/`dirname $vmlinuzpath`
   kname=vmlinuz
else
   # Ubuntu
   kpath=""
   kname=linux
fi

xorriso -dev $1						\
	-sh_style_result on				\
	-osirrox on					\
	-extract_single /boot/grub/grub.cfg $grubcfg

chmod u+w $grubcfg
cat <<EOF >>$grubcfg
menuentry 'Install preseeded' --id preseed {
    set background_color=black
    linux    $kpath/$kname auto=true priority=critical file=/cdrom/preseed.cfg --- quiet
    initrd   $kpath/initrd.gz
}

default=preseed
timeout=5
EOF

xorriso -indev $1				\
	-outdev $2				\
	-map $grubcfg /boot/grub/grub.cfg	\
	-map preseed.cfg /preseed.cfg		\
	-boot_image any replay

chmod -R a+rw $out
rm -rf $out