[Libguestfs] boot loader detection

[Nikos Skalkotos]

Hello,

I was looking for a way to detect the installed boot loader of an image
and I found this: https://github.com/arvidjaar/bootinfoscript
This script will inspection a lot of things on a running system and will
output a Report. The most interesting part is that it uses known Master
and Volume Boot Record byte-patterns to determine the installed boot loader: 
https://github.com/arvidjaar/bootinfoscript/blob/master/bootinfoscript#L2983-L3151
https://github.com/arvidjaar/bootinfoscript/blob/master/bootinfoscript#L2343-L2459

Those signatures (byte patterns) are from real mode machine code but this
code is not generated by a compiler and does not change often.

I’ve isolated and simplified the signatures database here: 

https://github.com/skalkoto/snf-image-creator/blob/develop/image_creator/bootloader.py

and I was wondering if you care to add 2 new libguestfs API methods e.g.:

char * guestfs_inspect_get_mbr_bootloader(guestfs *g)
char * guestfs_inspect_get_vbr_bootloader(guests *g, char *device)

that would return a string like “grub2”, “syslinux”, “windows”, etc.
I can write the code.

What do you think?

Nikos