> On 16 May 2019, at 11:05, Serhiy Storchaka <storch...@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().
As I said "I'm sure there is a lot more to cover all the corner cases and attack vectors." I did this: $ ln -s -f foo bar $ strace ln -s -f foo bar and long story short it does the rename from a tmp named symlink. Having a shutil function that does the same logic as GNU coreutils ln -s -f would seem to be a nice addition. However if you have a situation where security is a concern then there is a lot of design work that needs to be done that is surely outside the scope the stdlib as its application specific? Barry _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
