Tobias Bucher

According to [What non-Linux Unixes support openat?](https://stackoverflow.com/a/32137401) from StackOverflow: >[…], all major BSDs and Apple's OS X seem to support [openat] as of today: >* DragonFly since DragonFly 2.3. >*...

The same could be said for the attributes in #2 or #3. Hmm. Maybe add a function that tells `tempfile` to not mess with the file when persisting?

This is just a PoC right now, will fix the warnings etc. if this can get merged in one way or another. What do you think about this approach? I...

Hm. There doesn't seem to be a way to open a file with a given `Permissions` struct. The struct is opaque except for the readonly bit which isn't helpful in...

Fixed warnings, added some documentation, added a test.

Yay, now even compiles on Windows. It's good to go from my side now. :)

@quark-zju Feel free to redo this. :)

> The problem that this RFC solved can already be solved with semantic versioning, isn't it? Adding a new default-feature in a crate could be seen as a breaking change...

> The standard library is a special case. There are a handful of core crates in the ecosystem that really must avoid semver breaking changes, but in most cases it's...

> This sounds really cool! However, I think you may be underestimating how much work this is. There would also need to be collaboration with kernel developers about system calls...