tools: Adjust tools' path calculation.

I'm suggesting this change to make another tiny step towards the
ability to run the tools e.g. out of the build tree (so that multiple
different Xen versions can co-exist without the requirement to
re-install the respective version with each boot).

Signed-off-by: Jan Beulich <jbeulich@novell.com>

tools/misc/xen-python-path

@@ -28,8 +28,13 @@ import os
 import os.path
 import sys
 
-for p in ['python%s' % sys.version[:3], 'python']:
-    for l in ['/usr/lib64', '/usr/lib']:
+usr   = os.path.dirname(os.path.dirname(sys.argv[0]))
+list  = [ os.path.join(usr,'lib64') ]
+list += [ os.path.join(usr,'lib') ]
+list += ['/usr/lib64', '/usr/lib']
+
+for l in list:
+    for p in ['python%s' % sys.version[:3], 'python']:
         for k in ['', 'site-packages/']:
             d = os.path.join(l, p, k)
             if os.path.exists(os.path.join(d, AUXBIN)):

tools/python/xen/util/auxbin.py

@@ -27,6 +27,7 @@ LIB_64_ARCHS = [ 'x86_64', 's390x', 'sparc64']
 
 import os
 import os.path
+import sys
 
 
 def execute(exe, args = None):
@@ -47,6 +48,14 @@ def path():
 
 def libpath():
     machine = os.uname()[4]
+    if sys.argv[0] != '-c':
+        prefix = os.path.dirname(os.path.dirname(sys.argv[0]))
+        path = os.path.join(prefix, os.path.basename(LIB_64))
+        if machine in LIB_64_ARCHS and os.path.exists(path):
+            return path
+        path = os.path.join(prefix, os.path.basename(LIB_32))
+        if os.path.exists(path):
+            return path
     if machine in LIB_64_ARCHS and os.path.exists(LIB_64):
         return LIB_64
     else: