con.py 这个文件是有特殊含义吗？

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linux服务器上随便手了一个con.py文件，编写完，准备从windows上scp 过来，发现竟然死活无法发送：:/code/con.py: truncate: No error ， 又尝试从xftp直接从远程拉，也直接显示错误，然后把名称改了，竟然能正常发送了，这是为啥，太好奇了

发送

truncate

error

xftp

5 replies • 2022-04-30 07:34:27 +08:00

yuzo555

Apr 29, 2022

设备名称，类似的有 nul 、aux 、prn 、com1 、com2

learningman

Apr 29, 2022

con 在 Windows 上是 console 设备的名字
但是 con.py 应该是没问题的吧。。。

yzwduck

Apr 29, 2022

@learningman CON.PY 也一样会有兼容性问题，除非加上 \\?\ 前缀。
文档 https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file

Old New Things 写过一篇解释 "What's the deal with those reserved filenames like NUL and CON?"
https://devblogs.microsoft.com/oldnewthing/20031022-00/?p=42073

learningman

Apr 29, 2022

@yzwduck 看到了
Because it turns off automatic expansion of the path string, the "\\?\" prefix also allows the use of ".." and "." in the path names, which can be useful if you are attempting to perform operations on a file with these otherwise reserved relative path specifiers as part of the fully qualified path.

Many but not all file I/O APIs support "\\?\"; you should look at the reference topic for each API to be sure.

Note that Unicode APIs should be used to make sure the "\\?\" prefix allows you to exceed the MAX_PATH

MiketsuSmasher

Apr 30, 2022

不错，Windows 真够屎山