Redis如何将二进制数据写入转储文件？

Question

我想知道REDIS如何写二进制数据。 它打开的文件不是“b”模式。

fp = fopen(tmpfile,"w")

在这方面提供任何帮助。

Answer 1

在liunx中，fopen没有b模式，请参阅fopen man doc：

  r      Open text file for reading.  The stream is positioned at the beginning of the file.

   r+     Open for reading and writing.  The stream is positioned at the beginning of the file.

   w      Truncate file to zero length or create text file for writing.  The stream is positioned at the beginning of the file.

   w+     Open for reading and writing.  The file is created if it does not exist, otherwise it is truncated.  The stream is positioned at the beginning of the file.

   a      Open for appending (writing at end of file).  The file is created if it does not exist.  The stream is positioned at the end of the file.

   a+     Open  for reading and appending (writing at end of file).  The file is created if it does not exist.  The initial file position for reading is at the beginning of the file,
          but output is always appended to the end of the file.