[Python-ideas] shutil.symlink to allow non-race replacement of existing link targets

[Serhiy Storchaka]

16.05.19 14:33, Antoine Pitrou пише:
> On Thu, 16 May 2019 13:05:48 +0300
> Serhiy Storchaka <storchaka at gmail.com>
> wrote:
>> 16.05.19 11:28, Barry Scott пише:
>>> To replace one symlink with another atomically is possible by using rename() or renameat()
>>> something like:
>>>
>>> 	os.symlink( src, tmp_symlink )
>>> 	os.rename( tmp_symlink, dst )
>>
>> Somebody can replace tmp_symlink between os.symlink() and os.rename().
> 
> Not if tmp_symlink is created in a directory with strict permissions, I
> guess.

But in such case we do not need complex games with a temporary symlink. 
Just use os.symlink() and os.unlink() if needed.