File grub2-editenv-add-warning-message.patch of Package grub2.16182

Index: grub-2.02~beta2/util/editenv.c
===================================================================
--- grub-2.02~beta2.orig/util/editenv.c
+++ grub-2.02~beta2/util/editenv.c
@@ -30,12 +30,14 @@
 #include <string.h>
 
 #define DEFAULT_ENVBLK_SIZE	1024
+#define GRUB_ENVBLK_MESSAGE	"# WARNING: Do not edit this file other than by grub2-editenv\n"
 
 void
 grub_util_create_envblk_file (const char *name)
 {
   FILE *fp;
   char *buf;
+  char *pbuf;
   char *namenew;
 
   buf = xmalloc (DEFAULT_ENVBLK_SIZE);
@@ -46,9 +48,13 @@ grub_util_create_envblk_file (const char
     grub_util_error (_("cannot open `%s': %s"), namenew,
 		     strerror (errno));
 
-  memcpy (buf, GRUB_ENVBLK_SIGNATURE, sizeof (GRUB_ENVBLK_SIGNATURE) - 1);
-  memset (buf + sizeof (GRUB_ENVBLK_SIGNATURE) - 1, '#',
-          DEFAULT_ENVBLK_SIZE - sizeof (GRUB_ENVBLK_SIGNATURE) + 1);
+  pbuf = buf;
+  memcpy (pbuf, GRUB_ENVBLK_SIGNATURE, sizeof (GRUB_ENVBLK_SIGNATURE) - 1);
+  pbuf += sizeof (GRUB_ENVBLK_SIGNATURE) - 1;
+  memcpy (pbuf, GRUB_ENVBLK_MESSAGE, sizeof (GRUB_ENVBLK_MESSAGE) - 1);
+  pbuf += sizeof (GRUB_ENVBLK_MESSAGE) - 1;
+  memset (pbuf , '#',
+          DEFAULT_ENVBLK_SIZE - sizeof (GRUB_ENVBLK_SIGNATURE) - sizeof (GRUB_ENVBLK_MESSAGE) + 2);
 
   if (fwrite (buf, 1, DEFAULT_ENVBLK_SIZE, fp) != DEFAULT_ENVBLK_SIZE)
     grub_util_error (_("cannot write to `%s': %s"), namenew,