Lib/os todo

[litlighilit]

• [ ] os.stat(..., following_symlink)
• [ ] os.path.exists & pathlib.Path.exists
• [ ] make os.path compile when JS

[litlighilit]

• [ ] strerror

[litlighilit]

• [x] get/set_inhertiable
• [x] lseek
• [x] SEEK_{SET,CUR,END}
• [x] SEEK_HOLE SEEK_DATA ( unix, macOS, Linux >= 3.1)

[litlighilit]

• [ ] cpu_count pysince(3,4)
• [ ] process_cpu_count pysince(3,13) -> std/cpuinfo.countProcessors()

[litlighilit]

unix_only

• [ ] uname (ref posix_utils.uname)
• [ ] ctermid
• [ ] get*id std/posix ... see std/posix

[litlighilit]

js support

• [ ] open
• [ ] set_inheritable
• [ ] ...

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hard to support js

• [ ] fdopen (after io.open support js)