grub2/0028-Try-mac-guid-etc-before-grub.cfg-on-tftp-config-file.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Mon, 8 Jul 2019 17:33:22 +0200
Subject: [PATCH] Try mac/guid/etc before grub.cfg on tftp config files.

Signed-off-by: Peter Jones <pjones@redhat.com>
---
 grub-core/normal/main.c | 97 ++++++++++++++++++++++++++-----------------------
 1 file changed, 51 insertions(+), 46 deletions(-)

diff --git a/grub-core/normal/main.c b/grub-core/normal/main.c
index 025775021..880d0ebd4 100644
--- a/grub-core/normal/main.c
+++ b/grub-core/normal/main.c
@@ -345,61 +345,66 @@ grub_cmd_normal (struct grub_command *cmd __attribute__ ((unused)),
       /* Guess the config filename. It is necessary to make CONFIG static,
 	 so that it won't get broken by longjmp.  */
       char *config;
-      const char *prefix, *fw_path;
-
-      prefix = fw_path = grub_env_get ("fw_path");
-      if (fw_path)
-	{
-	  config = grub_xasprintf ("%s/grub.cfg", fw_path);
-	  if (config)
-	    {
-	      grub_file_t file;
-
-	      file = grub_file_open (config, GRUB_FILE_TYPE_CONFIG);
-	      if (file)
-		{
-		  grub_file_close (file);
-		  grub_enter_normal_mode (config);
-		}
-              else
-                {
-                  /*  Ignore all errors.  */
-                  grub_errno = 0;
-                }
-	      grub_free (config);
-	    }
-	}
+      const char *prefix;
+      const char *net_search_cfg;
+      int disable_net_search = 0;
 
+      prefix = grub_env_get ("fw_path");
       if (! prefix)
 	      prefix = grub_env_get ("prefix");
+
+      net_search_cfg = grub_env_get ("feature_net_search_cfg");
+      if (net_search_cfg && net_search_cfg[0] == 'n')
+	      disable_net_search = 1;
+
       if (prefix)
         {
-          grub_size_t config_len;
-          int disable_net_search = 0;
-          const char *net_search_cfg;
-
-          config_len = grub_strlen (prefix) +
-                       sizeof ("/grub.cfg-XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX");
-          config = grub_malloc (config_len);
-
-          if (!config)
-            goto quit;
-
-          grub_snprintf (config, config_len, "%s/grub.cfg", prefix);
-
-          net_search_cfg = grub_env_get ("feature_net_search_cfg");
-          if (net_search_cfg && net_search_cfg[0] == 'n')
-            disable_net_search = 1;
-
           if (grub_strncmp (prefix + 1, "tftp", sizeof ("tftp") - 1) == 0 &&
               !disable_net_search)
-            grub_net_search_config_file (config);
+            {
+              grub_size_t config_len;
+              config_len = grub_strlen (prefix) +
+                sizeof ("/grub.cfg-XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX");
+              config = grub_malloc (config_len);
 
-	  grub_enter_normal_mode (config);
-	  grub_free (config);
-	}
+              if (! config)
+                goto quit;
+
+              grub_snprintf (config, config_len, "%s/grub.cfg", prefix);
+
+              grub_net_search_configfile (config);
+
+              grub_enter_normal_mode (config);
+              grub_free (config);
+              config = NULL;
+            }
+
+          if (!config)
+            {
+              config = grub_xasprintf ("%s/grub.cfg", prefix);
+              if (config)
+                {
+                  grub_file_t file;
+
+                  file = grub_file_open (config, GRUB_FILE_TYPE_CONFIG);
+                  if (file)
+                    {
+                      grub_file_close (file);
+                      grub_enter_normal_mode (config);
+                    }
+                  else
+                    {
+                      /*  Ignore all errors.  */
+                      grub_errno = 0;
+                    }
+                  grub_free (config);
+                }
+            }
+        }
       else
-	grub_enter_normal_mode (0);
+        {
+          grub_enter_normal_mode (0);
+        }
     }
   else
     grub_enter_normal_mode (argv[0]);