Merge "Add option to swift-oldies to only print pids"

bin/swift-oldies

@@ -26,6 +26,9 @@ Lists old Swift processes.
     parser.add_option('-a', '--age', dest='hours', type='int', default=720,
                       help='look for processes at least HOURS old; '
                       'default: 720 (30 days)')
+    parser.add_option('-p', '--pids', action='store_true',
+                      help='only print the pids found; for example, to pipe '
+                      'to xargs kill')
     (options, args) = parser.parse_args()
 
     listing = []
@@ -68,6 +71,10 @@ Lists old Swift processes.
     if not listing:
         sys.exit()
 
+    if options.pids:
+        for hours, pid, args in listing:
+            print(pid)
+    else:
         hours_len = len('Hours')
         pid_len = len('PID')
         args_len = len('Command')