From: Robbie Harwood <rharwood@redhat.com>
Date: Fri, 4 Nov 2022 16:13:35 +0000 (-0400)
Subject: kern/env: Add function for retrieving variables as booleans
X-Git-Tag: grub-2.12-rc1~230
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b20192f22c0654039488f5d3ec07910fe438227b;p=thirdparty%2Fgrub.git

kern/env: Add function for retrieving variables as booleans

Signed-off-by: Robbie Harwood <rharwood@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---

diff --git a/grub-core/kern/env.c b/grub-core/kern/env.c
index 10e08ad76..764068896 100644
--- a/grub-core/kern/env.c
+++ b/grub-core/kern/env.c
@@ -144,6 +144,19 @@ grub_env_get (const char *name)
   return var->value;
 }
 
+bool
+grub_env_get_bool (const char *name, bool if_unset)
+{
+  const char *val = grub_env_get (name);
+
+  if (val == NULL || grub_strlen (val) < 1)
+    return if_unset;
+  if (grub_strcmp (val, "0") == 0 || grub_strcmp (val, "false") == 0 ||
+      grub_strcmp (val, "disable") == 0 || grub_strcmp (val, "no") == 0)
+    return false;
+  return true;
+}
+
 void
 grub_env_unset (const char *name)
 {
diff --git a/include/grub/env.h b/include/grub/env.h
index 76f832eb9..6b9379a30 100644
--- a/include/grub/env.h
+++ b/include/grub/env.h
@@ -45,6 +45,7 @@ struct grub_env_var
 
 grub_err_t EXPORT_FUNC(grub_env_set) (const char *name, const char *val);
 const char *EXPORT_FUNC(grub_env_get) (const char *name);
+bool EXPORT_FUNC(grub_env_get_bool) (const char *name, bool if_unset);
 void EXPORT_FUNC(grub_env_unset) (const char *name);
 struct grub_env_var *EXPORT_FUNC(grub_env_update_get_sorted) (void);