source: bootcd/isolinux/syslinux-6.03/gpxe/src/util/geniso @ e16e8f2

#!/bin/bash
#
# Generate a isolinux ISO boot image
#
# geniso foo.iso foo.lkrn
#
# the ISO image is the first argument so that a list of .lkrn images
# to include can be specified
#
case $# in
0|1)
        echo Usage: $0 foo.iso foo.lkrn ...
        exit 1
        ;;
esac
# This should be the default location of the isolinux.bin file
isolinux_bin=${ISOLINUX_BIN:-util/isolinux.bin}
if [ ! -r $isolinux_bin ]
then
        echo $0: $isolinux_bin not found, please install, or set ISOLINUX_BIN in arch/i386/Makefile correctly
        exit 1
fi
out=$1
shift
dir=`mktemp -d bin/iso.dir.XXXXXX`
cfg=$dir/isolinux.cfg
cp -p $isolinux_bin $dir
cat > $cfg <<EOF
# These default options can be changed in the geniso script
SAY Etherboot ISO boot image generated by geniso
TIMEOUT 30
EOF
first=
for f
do
        if [ ! -r $f ]
        then
                echo $f does not exist, skipping 1>&2
                continue
        fi
        b=$(basename $f)
        g=${b%.lkrn}
        g=${g//[^a-z0-9]}.krn
        case "$first" in
        "")
                echo DEFAULT $g
                ;;
        esac
        first=$g
        echo LABEL $b
        echo "" KERNEL $g
        cp -p $f $dir/$g
done >> $cfg
mkisofs -q -l -o $out -c boot.cat -b isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table $dir
rm -fr $dir