def is_locked_version_dir(vdir):
    if sys.platform == "win32":
        lockfile = os.path.join(vdir,ESKY_CONTROL_DIR,"bootstrap-manifest.txt")
        try:
            os.rename(lockfile,lockfile)
        except EnvironmentError:
            return True
        else:
            return False
    else:
        lockfile = os.path.join(vdir,ESKY_CONTROL_DIR,"lockfile.txt")
        f = open(lockfile,"r")
        try:
            fcntl.flock(f,fcntl.LOCK_EX|fcntl.LOCK_NB)
        except EnvironmentError, e:
            if e.errno not in (errno.EACCES,errno.EAGAIN,):
                raise
            return True
        else:
            return False
        finally:
            f.close()
Check whether the given version dir is locked.
dataset/ETHPy150Open cloudmatrix/esky/esky/util.py/is_locked_version_dir