From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Fedora Ninjas <[email protected]>
Date: Wed, 19 Feb 2014 15:58:43 -0500
Subject: [PATCH] use fw_path prefix when fallback searching for grub config

When PXE booting via UEFI firmware, grub was searching for grub.cfg
in the fw_path directory where the grub application was found. If
that didn't exist, a fallback search would look for config file names
based on MAC and IP address. However, the search would look in the
prefix directory which may not be the same fw_path. This patch
changes that behavior to use the fw_path directory for the fallback
search. Only if fw_path is NULL will the prefix directory be searched.

Signed-off-by: Mark Salter <[email protected]>
---
 grub-core/normal/main.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/grub-core/normal/main.c b/grub-core/normal/main.c
index 7ca2e5400b1..02577502116 100644
--- a/grub-core/normal/main.c
+++ b/grub-core/normal/main.c
@@ -347,7 +347,7 @@ grub_cmd_normal (struct grub_command *cmd __attribute__ ((unused)),
       char *config;
       const char *prefix, *fw_path;
 
-      fw_path = grub_env_get ("fw_path");
+      prefix = fw_path = grub_env_get ("fw_path");
       if (fw_path)
 	{
 	  config = grub_xasprintf ("%s/grub.cfg", fw_path);
@@ -370,7 +370,8 @@ grub_cmd_normal (struct grub_command *cmd __attribute__ ((unused)),
 	    }
 	}
 
-      prefix = grub_env_get ("prefix");
+      if (! prefix)
+	      prefix = grub_env_get ("prefix");
       if (prefix)
         {
           grub_size_t config_len;