bazil
Sticky bit support ?
https://en.wikipedia.org/wiki/Sticky_bit
The request I received by bazil/fuse does not have this bit. I wonder whether libfuse has support for sticky bit at all?
This showed up in pjdfstest POSIX tests https://github.com/pjd/pjdfstest/blob/master/tests/chmod/11.t#L27
Looks like the kernel removes it intentionally:
https://github.com/torvalds/linux/blob/cb690f5238d71f543f4ce874aa59237cf53a877c/fs/fuse/inode.c#L201-L208
See also https://pkg.go.dev/bazil.org/fuse#DefaultPermissions
Oh, except on top of that we might be missing sticky bit handling where we convert to Go os.FileMode. Testing...
While we would fail to convert the incoming mode to include Go os.ModeSticky, I have yet to see the sticky bit in input, even with DefaultPermissions and running as root. Weird.
So I wasn't seeing a sticky bit in input because I was mixing unix mode bits and Go's shuffling of what bit means what, and giving garbage input to os.Chmod. Not the first time Go's concept of file mode has hurt me. With that, this is trivial! Commit coming soon.