>From 810f62351dbb181843fdfdff7add4893e4e17710 Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <address@hidden>
Date: Tue, 5 May 2015 17:58:45 +0200
Subject: [PATCH] Allow for "lvmid/*" device map entries

---
 grub-core/kern/emu/hostdisk.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/grub-core/kern/emu/hostdisk.c b/grub-core/kern/emu/hostdisk.c
index a3b00c8..81b9840 100644
--- a/grub-core/kern/emu/hostdisk.c
+++ b/grub-core/kern/emu/hostdisk.c
@@ -538,8 +538,14 @@ read_device_map (const char *dev_map)
       map[drive].device = grub_canonicalize_file_name (p);
       if (! map[drive].device)
 	map[drive].device = xstrdup (p);
-      
-      if (!map[drive].drive)
+
+      if (strncmp(drive_e, "lvmid/", sizeof("lvmid/") - 1) == 0)
+	{
+	  map[drive].drive = xmalloc (drive_p - drive_e + sizeof ('\0'));
+	  strncpy (map[drive].drive, drive_e, drive_p - drive_e + sizeof ('\0'));
+	  map[drive].drive[drive_p - drive_e] = '\0';
+	}
+      else if (!map[drive].drive)
 	{
 	  char c;
 	  map[drive].drive = xmalloc (sizeof ("hostdisk/") + strlen (p));
-- 
2.1.4