rbuserdb.py 文件源码

def uidNumber_savenext(self, fd, uidNumber):
        """Save next uidNumber.

        Writes uidNumber to file descriptor fd, which must be the one
        returned by uidNumber_getnext(). Does not write anything if in
        test mode."""

        if not self.opt.test:
            os.lseek(fd, 0, 0)
            os.write(fd, '%s\n' % uidNumber)
            os.fdatasync(fd)