Hi,
I’ve looked at what grub-mkrescue does with grub-mkisofs (and found
a bug already whose fix I mailed upstream ☺). Basically, three things:
• --modification-date=YYYYmmddHHMMSS00 (bug: didn’t use -u option to
date(1) like the standard requires) – this is what they use as UUID.
In makefs_20100306-1: -o modification-date=YYYYmmddHHMMSS00
• -b boot/grub/i386-pc/eltorito.img --embedded-boot ${embed_img}
Here, eltorito.img and ${embed_img} are both created from the same
file except the former is prepended with cdboot.img the latter with
boot.img.
In makefs, you just 'dd if=${embed_img} of=$iso conv=notrunc' after
iso creation instead. grub-mkisofs does size checking… stat(1) exists.
• --protective-msdos-label
Relatively easy to do in mksh; somewhat easy in bash; challenging
but doable in dash. Basically, change the first sector of the image
after creation to have a fake MBR. GRUB’s uses 0xCD instead of 0x96,
which was standardised by IBM for CHRP, as partition type.
So, if desired, I can provide patches that replace the functionality
by equivalent calls to makefs plus either an mksh or a Debian 10.4
sh script.
bye,
//mirabilos
--
FWIW, I'm quite impressed with mksh interactively. I thought it was much
*much* more bare bones. But it turns out it beats the living hell out of
ksh93 in that respect. I'd even consider it for my daily use if I hadn't
wasted half my life on my zsh setup. :-) -- Frank Terbeck in #!/bin/mksh
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