Add methods to query the directory itself

[ksqsf]

I'm using openat to access the directory which is used as the mount point of a fuse filesystem. Unfortunately, during the initialization I cannot simply call dir.metadata(".") or dir.list_dir(".") because that would access the fuse fs itself instead of the directory! (speaking of macOS, not sure about Linux tho)

Therefore, I propose new methods self_metadata (fstat under the hood) and list_self to query the directory itself.

PS: this makes me wonder if deprecating cwd is a good decision tho. If the cwd is some directory A, but later a fs is mounted on A, Dir::open(".") will probably open the root of the fs instead of the directory A. I haven't tested so I'm not sure about this.

btw, do you have a better name?

[tailhook]

Looks good. Merged.

This makes me wonder if deprecating cwd is a good decision tho. If the cwd is some directory A, but later a fs is mounted on A, Dir::open(".") will probably open the root of the fs instead of the directory A. I haven't tested so I'm not sure about this.

Hm. Good question. The semantics, that it's not a real file descriptor is still a good argument to keep it deprecated, though.