Re: [RFC PATCH] fs: introduce mkdirat2 syscall for atomic mkdir

On Sat Feb 27, 2021 at 9:13 PM EST, Al Viro wrote:

No to the ABI part; "on error it returns -E..., on success - 0 or a
non-negative number representing a file descriptor (zero also
possible, but unlikely)" is bloody awful as calling conventions go,
especially since the case when 0 happens to be a descriptor is not
going to get a lot of testing on the userland side.

Hm, I was just trying to mimic the behavior of open(2). Do you have a
better suggestion?