Make checkperms.py look for shebang.

tools/checkperms/checkperms.py

Index: tools/checkperms/checkperms.py
diff --git a/tools/checkperms/checkperms.py b/tools/checkperms/checkperms.py
index cbdc6972c5eb359ac51dbb79a85565a1594c29c2..d70f4fad0ff5eccd66642acbdf874e114846279a 100755
--- a/tools/checkperms/checkperms.py
+++ b/tools/checkperms/checkperms.py
@@ -176,6 +176,12 @@ def CheckFile(file_path):
     return 'Failed to stat file: %s' % e
 
   if EXECUTABLE_PERMISSION & st_mode:
+    # Look if the file starts with #!/
+    with open(file_path, 'rb') as f:
+      if f.read(3).startswith('#!/'):

[Lei Zhang, 2012/04/13 19:09:49]

startswith -> ==

+        # That's fine.
+        return None
+    # TODO(maruel): Check that non-executable file do not start with a shebang.
     error = 'Contains executable permission'
     if VERBOSE:
       return '%s: %06o' % (error, st_mode)