Haskell: renameFile: Rename file

System.Directory module provides renameFile function, which is used to rename a file. Following is the signature of renameFile function.

Prelude System.Directory> :t renameFile

renameFile :: FilePath -> FilePath -> IO ()

Example

renameFile oldFile newFile

If the newFile already exists, it is atomically replaced by the oldFile.

You may get following errors while working with renameFile function.

Error	Description
HardwareFault	A physical I/O error has occurred.
InvalidArgument	Either operand is not a valid file name.
isDoesNotExistError / NoSuchThing	The original file does not exist, or there is no path to the target.
isPermissionError / PermissionDenied	The process has insufficient privileges to perform the operation.
ResourceExhausted	Insufficient resources are available to perform the operation.
UnsatisfiedConstraints	Implementation-dependent constraints are not satisfied.
UnsupportedOperation	The implementation does not support renaming in this situation.
InappropriateType	Either path refers to an existing directory.

DirectoryUtil.hs

import System.IO
import System.Directory

main = do
    putStrLn "Enter file path to rename"
    oldFile <- getLine

    putStrLn "Enter new name for the file"
    newFile <- getLine

    renameFile oldFile newFile
    putStrLn "File renamed"

$  ls -l /Users/harikrishna_gurram/admin.log
-rw-r--r--  1 harikrishna_gurram  ABC Users  2367 Apr  2 13:38 /Users/harikrishna_gurram/admin.log
$ 
$ runghc DirectoryUtil.hs 
Enter file path to rename
/Users/harikrishna_gurram/admin.log
Enter new name for the file
/Users/harikrishna_gurram/admin_tmp.log
File renamed
$ 
$  ls -l /Users/harikrishna_gurram/admin.log
ls: /Users/harikrishna_gurram/admin.log: No such file or directory
$
$  ls -l /Users/harikrishna_gurram/admin_tmp.log
-rw-r--r--  1 harikrishna_gurram  ABC Users  2367 Apr  2 13:38 /Users/harikrishna_gurram/admin_tmp.log

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