How to determince CD is bootable or not

UNIX for Advanced & Expert Users
1

Hi,

How can i determine the /dev/scd0 is bootable or not from command-line with single-line command according to ElTorito specification or something else?

Regards,

2

The isoinfo command can be used to extract that kind of data from iso images, if you don't have it, it comes with the cdrecord suite.

3

You can also use dd to determine if the CD/DVD is bootable i.e.

#!/bin/bash

DEVICE="/dev/sr0"
VERBOSE=1

bchex=`dd if=${DEVICE} skip=34887 bs=1 count=2 conv=swab 2>/dev/null | xxd | cut -d" " -f2`

bcdec=`printf "%d" 0x${bchex}`

bootable=`dd if=${DEVICE}  bs=1 skip=$(( bcdec * 2048 + 32))  count=1  2>/dev/null | xxd | cut -d" " -f2`

if [[ $bootable = 88 ]]; then
   [ $VERBOSE ] && printf "Bootable CDROM\n"
   exit 0
else
   [ $VERBOSE ] && printf "Not a bootable CDROM\n"
   exit 1
fi