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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Thu, 17 Jan 2019 13:10:39 -0500
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Subject: [PATCH] Make it possible to subtract conditions from debug=
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This makes it so you can do set debug to "all,-scripting,-lexer" and get the
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obvious outcome. Any negation present will take preference over that
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conditional, so "all,-scripting,scripting" is the same thing as
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"all,-scripting".
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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grub-core/kern/misc.c | 14 +++++++++++++-
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1 file changed, 13 insertions(+), 1 deletion(-)
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diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
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index aaae9aa0ab7..f6eaa7b4df8 100644
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--- a/grub-core/kern/misc.c
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+++ b/grub-core/kern/misc.c
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@@ -163,12 +163,24 @@ int
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grub_debug_enabled (const char * condition)
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{
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const char *debug;
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+ char *negcond;
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+ int negated = 0;
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debug = grub_env_get ("debug");
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if (!debug)
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return 0;
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- if (grub_strword (debug, "all") || grub_strword (debug, condition))
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+ negcond = grub_zalloc (grub_strlen (condition) + 2);
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+ if (negcond)
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+ {
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+ grub_strcpy (negcond, "-");
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+ grub_strcpy (negcond+1, condition);
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+ negated = grub_strword (debug, negcond);
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+ grub_free (negcond);
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+ }
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+
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+ if (!negated &&
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+ (grub_strword (debug, "all") || grub_strword (debug, condition)))
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return 1;
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return 0;
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