4f6c460917
Unlike files accessed via a normal file system, the file->read_hook() is not honoured when using blocklist notation. This means that when trying to use a dedicated, 1 KiB, raw partition for the environment block and hence does something like save_env --file=(hd0,gpt9)0+2 X Y Z this fails with "sparse file not allowed", which is rather unexpected, as I've explicitly said exactly which blocks should be used. Adding a little debugging reveals that grub_file_size(file) is 1024 as expected, but total_length is 0, simply because the callback was never invoked, so blocklists is an empty list. Fix that by honouring the ->read_hook() set by the caller, also when a "file" is specified with blocklist notation. Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk> Reviewed-by: Vladimir Serbinenko <phcoder@gmail.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'