If the operating system has a notion of current directories,
getCurrentDirectory returns an absolute path to the current
directory of the calling process.
The operation may fail with:
- HardwareFault A physical I/O error has occurred.
[EIO]
- isDoesNotExistError / NoSuchThing There is no
path referring to the current directory. [EPERM, ENOENT,
ESTALE...]
- isPermissionError / PermissionDenied The process
has insufficient privileges to perform the operation.
[EACCES]
- ResourceExhausted Insufficient resources are available to
perform the operation.
- UnsupportedOperation The operating system has no notion
of current directory.