0eb684e8bf
The 30_uefi-firmware template checks if an OsIndicationsSupported UEFI var exists and EFI_OS_INDICATIONS_BOOT_TO_FW_UI bit is set, to decide whether a "fwsetup" menu entry would be added or not to the GRUB menu. But this has the problem that it will only work if the configuration file was created on an UEFI machine that supports booting to a firmware UI. This for example doesn't support creating GRUB config files when executing on systems that support both UEFI and legacy BIOS booting. Since creating the config file from legacy BIOS wouldn't allow to access the firmware UI. To prevent this, make the template to unconditionally create the grub.cfg snippet but check at runtime if was booted through UEFI to decide if this entry should be added. That way it won't be added when booting with BIOS. There's no need to check if EFI_OS_INDICATIONS_BOOT_TO_FW_UI bit is set, since that's already done by the "fwsetup" command when is executed. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Robbie Harwood <rharwood@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'