cat.py 文件源码

def get_last_offset(self, f):

        st = os.fstat(f.fileno())
        ino = st[stat.ST_INO]
        size = st[stat.ST_SIZE]

        try:
            last = self.read_last_stat()
        except IOError:
            # no such file
            last = {'inode': 0, 'offset': 0}

        if last['inode'] == ino and last['offset'] <= size:
            return last['offset']
        else:
            return 0