Haskell: Working with file access and modification times

Haskell System.Directory module provides following funcitons to get and set file (or) directory access and modification times. Following table summarizes the functions.

Function	Signature	Description
getAccessTime	FilePath -> IO UTCTime	Get the time at which the file or directory was last accessed.
getModificationTime	FilePath -> IO UTCTime	Get the time at which the file or directory was last modified.
setAccessTime	FilePath -> UTCTime -> IO () Source	Change the time at which the file or directory was last accessed.
setModificationTime	FilePath -> UTCTime -> IO ()	Change the time at which the file or directory was last modified.

Above functions may fail with following errors.

isPermissionError if the user is not permitted to alter the access time.

isDoesNotExistError if the file or directory does not exist.

FileTimeUtil.hs

import System.Directory
import System.IO

main = do
    putStrLn "Enter file (or) directory"
    file <- getLine

    accessTime <- getAccessTime file
    modificationTime <- getModificationTime file

    putStrLn $ "access time : " ++ (show accessTime)
    putStrLn $ "modification time : " ++ (show modificationTime)

$ runghc FileTimeUtil.hs 
Enter file (or) directory
/Users/harikrishna_gurram/
access time : 2016-04-07 09:36:16 UTC
modification time : 2016-04-07 05:45:44 UTC

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