feat: add ofs ctrl-c exit unmount hook

[oowl]

currently, if we stop ofs running, it does not unmount fuse3 dir,

╭─ouyang@owl-home ~/code/opendal/bin/ofs ‹main› 
╰─$ RUST_LOG=debug ./target/debug/ofs ./exampless "fs://?root=/home/ouyang/tmp" 
[2024-03-25T14:27:05Z DEBUG opendal::services::fs::backend] backend build started: FsBuilder { root: Some("/home/ouyang/tmp"), atomic_write_dir: None }
[2024-03-25T14:27:05Z DEBUG opendal::services::fs::backend] backend use root /home/ouyang/tmp
[2024-03-25T14:27:05Z DEBUG opendal::services::fs::backend] backend build finished: FsBuilder { root: None, atomic_write_dir: None }
^C
╭─ouyang@owl-home ~/code/opendal/bin/ofs ‹main› 
╰─$ ls -al ./exampless                                                                                                                                                   130 ↵
ls: cannot access './exampless': Transport endpoint is not connected
╭─ouyang@owl-home ~/code/opendal/bin/ofs ‹main› 
╰─$ sudo fusermount3 -u ./exampless           

fuse3 has been implement unmount feature Sherlock-Holo/fuse3#78, but it just include by alpha release. I am not sure if we can accept the alpha release crates library (due to ofs being early stage)?

╭─ouyang@owl-home ~/code/opendal/bin/ofs ‹feat/ofs-unmount-ctrl-c› 
╰─$ RUST_LOG=debug ./target/debug/ofs ./exampless "fs://?root=/home/ouyang/tmp"                                                                                          130 ↵
[2024-03-25T14:31:45Z DEBUG opendal::services::fs::backend] backend build started: FsBuilder { root: Some("/home/ouyang/tmp"), atomic_write_dir: None }
[2024-03-25T14:31:45Z DEBUG opendal::services::fs::backend] backend use root /home/ouyang/tmp
[2024-03-25T14:31:45Z DEBUG opendal::services::fs::backend] backend build finished: FsBuilder { root: None, atomic_write_dir: None }
^C%                                                                                                                                                                            ╭─ouyang@owl-home ~/code/opendal/bin/ofs ‹feat/ofs-unmount-ctrl-c› 
╰─$ ls -al ./exampless
total 0
drwxr-xr-x 1 ouyang ouyang   0 Mar 25 16:59 .
drwxr-xr-x 1 ouyang ouyang 166 Mar 25 22:31 ..

[Xuanwo]

I am not sure if we can accept the alpha release crates library (due to ofs being early stage)?

If the authors are labeling this release as alpha, they must have their reasons, right? Otherwise, we could simply request a stable version. Therefore, I don't believe we need to or should rely on an alpha release.

[oowl]

I am not sure if we can accept the alpha release crates library (due to ofs being early stage)?

If the authors are labeling this release as alpha, they must have their reasons, right? Otherwise, we could simply request a stable version. Therefore, I don't believe we need to or should rely on an alpha release.

Yeah, Let's draft the current PR and wait for the upstream release.

[Xuanwo]

Also invite @Sherlock-Holo to join the discussion.

[oowl]

Also invite @Sherlock-Holo to join the discussion.

https://github.com/Sherlock-Holo/fuse3/releases/tag/0.7.1 v0.7.1 released, Let's continue.

[Xuanwo]

Thanks!