grub2/0164-Make-it-possible-to-subtract-conditions-from-debug.patch
Petr Šabata 100e37f2e6 RHEL 9.0.0 Alpha bootstrap
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with the following as its source:
https://src.fedoraproject.org/rpms/grub2#f7e054f3d693af43a903faf33b70673f7aca4508
2020-10-15 09:48:35 +02:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Thu, 17 Jan 2019 13:10:39 -0500
Subject: [PATCH] Make it possible to subtract conditions from debug=
This makes it so you can do set debug to "all,-scripting,-lexer" and get the
obvious outcome. Any negation present will take preference over that
conditional, so "all,-scripting,scripting" is the same thing as
"all,-scripting".
Signed-off-by: Peter Jones <pjones@redhat.com>
---
grub-core/kern/misc.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
index e21dd44c7cf..18a7dbf4cd7 100644
--- a/grub-core/kern/misc.c
+++ b/grub-core/kern/misc.c
@@ -163,12 +163,24 @@ int
grub_debug_enabled (const char * condition)
{
const char *debug;
+ char *negcond;
+ int negated = 0;
debug = grub_env_get ("debug");
if (!debug)
return 0;
- if (grub_strword (debug, "all") || grub_strword (debug, condition))
+ negcond = grub_zalloc (grub_strlen (condition) + 2);
+ if (negcond)
+ {
+ grub_strcpy (negcond, "-");
+ grub_strcpy (negcond+1, condition);
+ negated = grub_strword (debug, negcond);
+ grub_free (negcond);
+ }
+
+ if (!negated &&
+ (grub_strword (debug, "all") || grub_strword (debug, condition)))
return 1;
return 0;