995a745c28
The previous behavior ignored an error and the output from grub-mkrescue. This made it difficult to discover that grub-mkrescue was the reason that tests which rely on grub-shell were failing. Even after discovering grub-mkrescue was the culprit, there was no output to indicate why it was failing. It turns out that grub-mkrescue is a thin wrapper around xorriso. So if you do not have xorriso installed it will fail with an error message about not being able to find xorriso. This change will allow grub-mkrescue output to be written to stderr, only if grub-mkrescue fails. If grub-mkrescue succeeds, there will be no output from grub-mkrescue so as not to interfere with the functioning of tests. This change should have no effect on the running of tests or other uses of grub-shell as it only modifies the error path. Also, if grub-mkrescue fails, the script exits early. Since grub-shell needs the ISO image created by grub-mkresue to boot the QEMU instance, a failure here should be considered fatal. Signed-off-by: Glenn Washburn <development@efficientek.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'