[Libguestfs] Re: [COMMON PATCH v2] mldrivers: look for bootloader config in /boot/grub/grub.cfg in case of UEFI

On some older Debian-based distros (in particular, this is true for Debian 8) GRUB config file doesn't reside on EFI partition, but rather at /boot/grub/grub.cfg even if UEFI firmware is being used. As a result, in the UEFI case we get "error: no bootloader detected". Let's just append this path to the end of the corresponding list as a workaround when dealing with UEFI guests. Signed-off-by: Andrey Drobyshev <andrey.drobyshev(a)virtuozzo.com&gt; --- mldrivers/linux_bootloaders.ml | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/mldrivers/linux_bootloaders.ml b/mldrivers/linux_bootloaders.ml index 6f8857e..91c5ab9 100644 --- a/mldrivers/linux_bootloaders.ml +++ b/mldrivers/linux_bootloaders.ml @@ -375,6 +375,18 @@ let detect_bootloader (g : G.guestfs) root i_firmware = with G.Error msg -> error (f_"could not find bootloader mount point (%s): %s") mp msg in + (* + * Workaround for older UEFI-based Debian which may not have + * /boot/efi/EFI/debian/grub.cfg. + *) + let paths = + if g#exists "/boot/grub/grub.cfg" then + match i_firmware with + | Firmware.I_BIOS -> paths + | I_UEFI _ -> paths @ ["/boot/grub/grub.cfg"] + else paths + in + (* We can determine if the bootloader config file is grub 1 or * grub 2 just by looking at the filename. *)