File 0010-kern-lockdown-Set-a-variable-if-the-GRUB-i... of Package grub2.19106

Overview Repositories Revisions Requests Users Attributes Meta

File 0010-kern-lockdown-Set-a-variable-if-the-GRUB-is-locked-d.patch of Package grub2.19106

From 12328041098c161404f553f4bf2ccd20bbd105b7 Mon Sep 17 00:00:00 2001
From: Javier Martinez Canillas <javierm@redhat.com>
Date: Tue, 2 Feb 2021 19:59:48 +0100
Subject: [PATCH 10/45] kern/lockdown: Set a variable if the GRUB is locked
 down

It may be useful for scripts to determine whether the GRUB is locked
down or not. Add the lockdown variable which is set to "y" when the GRUB
is locked down.

Suggested-by: Dimitri John Ledkov <xnox@ubuntu.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 docs/grub.texi            | 3 +++
 grub-core/kern/lockdown.c | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/docs/grub.texi b/docs/grub.texi
index b91d620d0..35433b3ae 100644
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -5820,6 +5820,9 @@ The GRUB can be locked down when booted on a secure boot environment, for exampl
 if the UEFI secure boot is enabled. On a locked down configuration, the GRUB will
 be restricted and some operations/commands cannot be executed.
 
+The @samp{lockdown} variable is set to @samp{y} when the GRUB is locked down.
+Otherwise it does not exit.
+
 @node Platform limitations
 @chapter Platform limitations
 
diff --git a/grub-core/kern/lockdown.c b/grub-core/kern/lockdown.c
index 1e56c0b80..0bc70fd42 100644
--- a/grub-core/kern/lockdown.c
+++ b/grub-core/kern/lockdown.c
@@ -18,6 +18,7 @@
  */
 
 #include <grub/dl.h>
+#include <grub/env.h>
 #include <grub/file.h>
 #include <grub/lockdown.h>
 #include <grub/verify.h>
@@ -71,6 +72,9 @@ grub_lockdown (void)
   lockdown = GRUB_LOCKDOWN_ENABLED;
 
   grub_verifier_register (&lockdown_verifier);
+
+  grub_env_set ("lockdown", "y");
+  grub_env_export ("lockdown");
 }
 
 int
-- 
2.26.2

Places

File 0010-kern-lockdown-Set-a-variable-if-the-GRUB-is-locked-d.patch of Package grub2.19106

Places