On Tue, Feb 15, 2022 at 5:06 PM Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote: > Does POSIX actually make any promises in that area? My understanding is that we inherit from the mandatory atomicity of all rename calls (https://pubs.opengroup.org/onlinepubs/000095399/functions/rename.html) > That specification requires that the action of the function be atomic. We also inherit from the link call that is required to be atomic (https://pubs.opengroup.org/onlinepubs/009695399/functions/link.html) > The link() function shall atomically create a new link for the existing file and the link count of the file shall be incremented by one
