HP-UX is another one of those platforms using an alternative lock

structure (same as AIX).

Lib/test/test_fcntl.py

@@ -21,7 +21,7 @@ if sys.platform in ('netbsd1',
                     'bsdos2', 'bsdos3', 'bsdos4',
                     'openbsd', 'openbsd2'):
     lockdata = struct.pack('lxxxxlxxxxlhh', 0, 0, 0, FCNTL.F_WRLCK, 0)
-elif sys.platform in ['aix3', 'aix4']:
+elif sys.platform in ['aix3', 'aix4', 'hp-uxB']:
     lockdata = struct.pack('hhlllii', FCNTL.F_WRLCK, 0, 0, 0, 0, 0, 0)
 else:
     lockdata = struct.pack('hhllhh', FCNTL.F_WRLCK, 0, 0, 0, 0, 0)