basic support for uuid

README.rst

@@ -46,6 +46,16 @@ To update the on-disk filesystem table, call ``save()``::
                 fs.options.add('user_xattr')
         fstab.save()
 
+You can get UUID of drive by using ``get_uuid()`` method, like this::
+
+    with FilesystemTable() as fstab:
+        for fs in fstab:
+            print "%s = %s" % (fs.source, fs.get_uuid())
+
+Getting proper results from get_uuid() requires root access on some systems. If drive does
+not have UUID, or you don't have permissions to read it, get_uuid() will return empty string.
+UUID detection requires libblkid installed in your system.
+
 
 Limitations
 -----------

libmount/fstab.py

@@ -14,6 +14,18 @@
 else:
     raise ImportError("Could not find libmount shared object. Is libmount installed?")
 
+
+libnames = ('libblkid.so', 'libblkid.so.1')
+for libname in libnames:
+    try:
+        _libblkid = ctypes.cdll.LoadLibrary(libname)
+    except OSError:
+        continue
+    break
+else:
+    _libblkid = False
+
+
 class FilesystemTable(list):
     class Options(set):
         """A sub-type of set for maintaining filesystem options."""
@@ -90,6 +102,24 @@ def _set_options(self, value):
             del self._options
         options = property(_get_options, _set_options)
 
+
+        def get_uuid(self):
+            """ Returns UUID of self.source drive 
+                requires root permissions
+            """
+            if not _libblkid or not self.source:
+                return ''
+            if self.source[0:5].lower() == 'uuid=':
+                return self.source[5:].lower()
+            pr = _libblkid.blkid_new_probe_from_filename( self.source )
+            if pr == 0:
+                return ''
+            uuid = ctypes.c_char_p('')
+            _libblkid.blkid_do_probe(pr);
+            _libblkid.blkid_probe_lookup_value(pr, 'UUID', ctypes.byref(uuid), None);
+            _libblkid.blkid_free_probe(pr);
+            return uuid.value.lower()
+
         def __unicode__(self):
             return "%s on %s type %s (%s)" % (self.source,
                                               self.target,
@@ -173,4 +203,4 @@ def save(self):
 def get_fstab_readonly():
     return FilesystemTable('/etc/fstab', readonly=True)
 def get_current_mounts():
-    return FilesystemTable('/proc/mounts', readonly=True)
+    return FilesystemTable('/proc/mounts', readonly=True)