  };
  
 diff --git a/src/init.c b/src/init.c
-index 735fef6..184ebb3 100644
+index 76868cc..9d16d86 100644
 --- a/src/init.c
 +++ b/src/init.c
-@@ -65,7 +65,8 @@ static inline void unlock() { }
+@@ -63,7 +63,8 @@
  
  #define _HAS_IDS_   (  _FOREIGN_HAS_(UID)  \
                      || _FOREIGN_HAS_(EUID) \

From e2f6f775f696bebf5acad2c424bc1fde5ce7e0c0 Mon Sep 17 00:00:00 2001
From: Ronan Le Martret <ronan@fridu.net>
Date: Tue, 8 Jul 2014 10:40:21 +0200
Subject: [PATCH 1/1] Add env value SYSROOT for root fs prefix.

Change-Id: I5c57494317473dcd74c85cbc2bce19a6d68c2739
Signed-off-by: Ronan Le Martret <ronan@fridu.net>
---
 src/foreign.c           |  5 +++++
 src/foreign.h           |  7 ++++++-
 src/tzplatform_config.c | 14 +++++++++++++-
 3 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/src/foreign.c b/src/foreign.c
index dab1c21..b700274 100644
--- a/src/foreign.c
+++ b/src/foreign.c
@@ -85,6 +85,11 @@ enum fkey foreign( const char *name, size_t length)
         default: break;
         }
     }
+#if _FOREIGN_HAS_(SYSROOT)
+    else if (length == 7 && name[0]=='S' && name[1]=='Y' && name[2]=='S' && name[3]=='R' && name[4]=='O' && name[5]=='O' && name[6]=='T') {
+      return SYSROOT;
+    }
+#endif
     return _FOREIGN_INVALID_;
 }
 
diff --git a/src/foreign.h b/

index 3c9066f..a918bd8 100644
--- a/src/foreign.h
+++ b/src/foreign.h
@@ -31,9 +31,11 @@
 #define _FOREIGN_MASK_EHOME_  16
 #define _FOREIGN_MASK_EUID_   32
 #define _FOREIGN_MASK_EUSER_  64
+#define _FOREIGN_MASK_SYSROOT_  128
 
 #define _FOREIGNS_TO_USE_   ( _FOREIGN_MASK_HOME_  \

 
 #define _FOREIGN_HAS_(x)  (0 != ((_FOREIGNS_TO_USE_) & (_FOREIGN_MASK_##x##_)))
 
 enum fkey {
-    _FOREIGN_INVALID_ = -1, 
+    _FOREIGN_INVALID_ = -1,
 #if _FOREIGN_HAS_(HOME)
     HOME,
 #endif
 #if _FOREIGN_HAS_(UID)
-    UID, 
+    UID,
 #endif
 #if _FOREIGN_HAS_(USER)
     USER,
@@ -52,14 +54,17 @@
     GID, 
 #endif
 #if _FOREIGN_HAS_(EHOME)
-    EHOME, 
+    EHOME,
 #endif
 #if _FOREIGN_HAS_(EUID)
-    EUID, 
+    EUID,
 #endif
 #if _FOREIGN_HAS_(EUSER)
     EUSER,
 #endif
