tailbot.py 文件源码

def follow_file(filename):
    while True:
        try:
            fd = os.open(filename, os.O_RDONLY | os.O_NONBLOCK)
        except OSError:
            yield None
            continue

        try:
            inode = os.fstat(fd).st_ino
            first = True

            while True:
                try:
                    stat = os.stat(filename)
                except OSError:
                    stat = None

                yield first, time.time(), fd
                if stat is None or inode != stat.st_ino:
                    break

                first = False
        finally:
            os.close(fd)