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Michael Chang 5e5a15872d grub-editenv: Warn a user against editing environment block
The environment block is a preallocated 1024-byte file which serves as
persistent storage for environment variables. It has its own format
which is sensitive to corruption if an editor does not know how to
process it. Besides that the editor may inadvertently change grubenv
file size and/or make it sparse which can lead to unexpected results.

This patch adds a message to the grubenv file to warn a user against
editing it by tools other than grub-editenv.

Signed-off-by: Michael Chang <mchang@suse.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2019-11-18 14:19:25 +01:00
asm-tests asm-tests/i386-pc: Check that movl is 5 bytes. 2016-09-28 20:31:04 +03:00
conf gnulib: Upgrade Gnulib and switch to bootstrap tool 2019-03-05 10:48:12 +01:00
docs templates: Add GRUB_DISABLE_UUID 2019-10-28 15:35:40 +01:00
grub-core hostdisk: Set linux file descriptor to O_CLOEXEC as default 2019-11-18 13:42:55 +01:00
include RISC-V: Add __clzdi2 symbol 2019-09-23 13:17:15 +02:00
po gnulib: Upgrade Gnulib and switch to bootstrap tool 2019-03-05 10:48:12 +01:00
tests syslinux: Fix syslinux_test in out-of-tree builds 2019-03-05 10:27:53 +01:00
themes/starfield Starfield theme. 2012-02-23 17:21:38 +01:00
unicode * unicode: Import Unicode 6.0 data. 2011-12-25 16:17:25 +01:00
util grub-editenv: Warn a user against editing environment block 2019-11-18 14:19:25 +01:00
.gitattributes gitattributes: Mark po/exclude.pot as binary so git won't try to diff nonprintables 2019-09-23 13:17:15 +02:00
.gitignore gnulib: Upgrade Gnulib and switch to bootstrap tool 2019-03-05 10:48:12 +01:00
.travis.yml travis: Add Travis CI config file 2019-02-25 14:02:06 +01:00
acinclude.m4 Fix -nopie/-nopie check. 2017-01-30 19:38:55 +01:00
AUTHORS 2005-09-03 Yoshinori K. Okuji <okuji@enbug.org> 2005-09-03 16:54:27 +00:00
autogen.sh POTFILES: Don't include gnulib in grub.pot 2019-03-26 15:04:17 +01:00
bootstrap gnulib: Upgrade Gnulib and switch to bootstrap tool 2019-03-05 10:48:12 +01:00
bootstrap.conf getroot: Save/restore CWD more reliably on Unix 2019-03-19 11:23:22 +01:00
BUGS * BUGS: New file. 2011-01-11 00:06:01 +01:00
ChangeLog-2015 Autogenerate ChangeLog from git changelog. 2015-01-24 17:29:50 +01:00
config.h.in Remove libgcc dependency. 2015-03-03 20:50:37 +01:00
configure.ac RISC-V: Add __clzdi2 symbol 2019-09-23 13:17:15 +02:00
COPYING 2007-07-22 Yoshinori K. Okuji <okuji@enbug.org> 2007-07-21 23:32:33 +00:00
coreboot.cfg * coreboot.cfg: Add missing file. 2013-11-20 00:52:23 +01:00
geninit.sh automake commit without merge history 2010-05-06 11:34:04 +05:30
gentpl.py RISC-V: Add to build system 2019-02-25 14:02:05 +01:00
INSTALL gnulib: Upgrade Gnulib and switch to bootstrap tool 2019-03-05 10:48:12 +01:00
linguas.sh linguas: Don't skip ko.po. 2017-02-04 00:06:57 +01:00
Makefile.am Makefile: Allow to set file systems modules for default_payload.elf 2019-03-12 20:04:07 +01:00
Makefile.util.def gnulib: Upgrade Gnulib and switch to bootstrap tool 2019-03-05 10:48:12 +01:00
NEWS Release 2.04 2019-07-04 15:57:30 +02:00
README README: Remove dead link to the wiki 2015-11-06 04:31:23 +01:00
THANKS 2009-12-11 Robert Millan <rmh.grub@aybabtu.com> 2009-12-11 22:44:47 +00:00
TODO TODO: Remove obsolete link 2016-02-12 17:51:52 +01:00

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'