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UEFI 2.6 9.3.6.4 File Path Media Device Path says that Path Name is "A NULL-terminated Path string including directory and file names". Strip final NULL from Path Name in each File Path node when constructing full path. To be on safe side, strip all of them. Fixes failure chainloading grub from grub, when loaded grub truncates image path and does not find its grub.cfg. https://bugzilla.opensuse.org/show_bug.cgi?id=1026344 This was triggered by commit ce95549cc54b5d6f494608a7c390dba3aab4fba7; before it we built Path Name without trailing NULL, and apparently all other bootloaders use single File Path node, thus not exposing this bug.
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. 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'