Fix race condition on process listing.

adsl.py

@@ -12,9 +12,12 @@ def _get_process_list():
     pids = [int(pid) for pid in os.listdir('/proc') if pid.isdigit()]
     processes = []
     for pid in pids:
-        f = open("/proc/%i/cmdline" % pid, "r")
-        processes.append(f.read())
-        f.close()
+        try:
+            f = open("/proc/%i/cmdline" % pid, "r")
+            processes.append(f.read())
+            f.close()
+        except:
+            pass
     return zip(pids, processes)