Making the exception caught during os.dup of stdin explicit

Related to f23bb344

lib/ansible/runner/__init__.py

@@ -511,7 +511,7 @@ class Runner(object):
             if not new_stdin and fileno is not None:
                 try:
                     self._new_stdin = os.fdopen(os.dup(fileno))
-                except:
+                except OSError, e:
                     # couldn't dupe stdin, most likely because it's
                     # not a valid file descriptor, so we just rely on
                     # using the one that was passed in
@@ -1103,7 +1103,7 @@ class Runner(object):
             if fileno is not None:
                 try:
                     new_stdin = os.fdopen(os.dup(fileno))
-                except:
+                except OSError, e:
                     # couldn't dupe stdin, most likely because it's
                     # not a valid file descriptor, so we just rely on
                     # using the one that was passed in