From a990af656571a24156a183dd8a09765e788c3b22 Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Sat, 18 Jan 2014 16:41:47 +0100
Subject: [PATCH 020/198] * grub-core/kern/efi/efi.c: Ensure that the result
 starts with / and has no //.

---
 ChangeLog                |  5 +++++
 grub-core/kern/efi/efi.c | 25 +++++++++++++++++--------
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 6a19f85..b04a4ef 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2014-01-18  Vladimir Serbinenko  <phcoder@gmail.com>
 
+	* grub-core/kern/efi/efi.c: Ensure that the result starts with /
+	and has no //.
+
+2014-01-18  Vladimir Serbinenko  <phcoder@gmail.com>
+
 	* NEWS: Add few missing entries.
 
 2014-01-17  Colin Watson  <cjwatson@ubuntu.com>
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index b253141..b9eb1ab 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -309,7 +309,7 @@ grub_efi_modules_addr (void)
 char *
 grub_efi_get_filename (grub_efi_device_path_t *dp0)
 {
-  char *name = 0, *p;
+  char *name = 0, *p, *pi;
   grub_size_t filesize = 0;
   grub_efi_device_path_t *dp;
 
@@ -328,7 +328,7 @@ grub_efi_get_filename (grub_efi_device_path_t *dp0)
 	  grub_efi_uint16_t len;
 	  len = ((GRUB_EFI_DEVICE_PATH_LENGTH (dp) - 4)
 		 / sizeof (grub_efi_char16_t));
-	  filesize += GRUB_MAX_UTF8_PER_UTF16 * len + 1;
+	  filesize += GRUB_MAX_UTF8_PER_UTF16 * len + 2;
 	}
 
       dp = GRUB_EFI_NEXT_DEVICE_PATH (dp);
@@ -356,12 +356,12 @@ grub_efi_get_filename (grub_efi_device_path_t *dp0)
 	  grub_efi_file_path_device_path_t *fp;
 	  grub_efi_uint16_t len;
 
-	  if (p != name)
-	    *p++ = '/';
+	  *p++ = '/';
 
 	  len = ((GRUB_EFI_DEVICE_PATH_LENGTH (dp) - 4)
 		 / sizeof (grub_efi_char16_t));
 	  fp = (grub_efi_file_path_device_path_t *) dp;
+
 	  p = (char *) grub_utf16_to_utf8 ((unsigned char *) p, fp->path_name, len);
 	}
 
@@ -370,10 +370,19 @@ grub_efi_get_filename (grub_efi_device_path_t *dp0)
 
   *p = '\0';
 
-  /* EFI breaks paths with backslashes.  */
-  for (p = name; *p; p++)
-    if (*p == '\\')
-      *p = '/';
+  for (pi = name, p = name; *pi;)
+    {
+      /* EFI breaks paths with backslashes.  */
+      if (*pi == '\\' || *pi == '/')
+	{
+	  *p++ = '/';
+	  while (*pi == '\\' || *pi == '/')
+	    pi++;
+	  continue;
+	}
+      *p++ = *pi++;
+    }
+  *p = '\0';
 
   return name;
 }
-- 
2.7.4