f6ee40326b
Fix BOOT_PATH logic in grub-install: non-removable installs now use
EFI/${BOOTLOADER_ID} per UEFI spec instead of always EFI/BOOT.
Add timeout validation to grub-mkconfig (must be non-negative integer).
Add sync() method to fat_tool.py and call os.fsync after cp_in to
ensure data reaches disk. Fix misleading block-device error message.