Haskell: getCurrentDirectory: Get current working directory

System.Directory module provides getCurrentDirectory function, which return the absolute path of current working directory.

As per documentation, you may get following error while working with getCurrentDirectory.

Error	Description
HardwareFault	A physical I/O error has occurred.
isDoesNotExistError or NoSuchThing	There is no path referring to the working directory.
isPermissionError or PermissionDenied	The process has insufficient privileges to perform the operation.
ResourceExhausted	Insufficient resources are available to perform the operation.
UnsupportedOperation	The operating system has no notion of current working directory.

Prelude System.Directory> :t getCurrentDirectory
getCurrentDirectory :: IO FilePath
Prelude System.Directory>
Prelude System.Directory> getCurrentDirectory 
"/Users/harikrishna_gurram/"

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