SimpleH.File

Exported modules

module System.FilePath

module SimpleH

The File interface

data File

Constructors

File (Maybe String) (Maybe ByteString)

Directory [(String, File)]

Instances

Show File

getFile :: FilePath -> IO File

showFile :: File -> String

_file :: Traversal' File (Maybe String, Maybe ByteString)

_directory :: Traversal' File [(String, File)]

getCurrentDirectory :: IO FilePath

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.

Note that in a concurrent program, the current directory is global state shared between all threads of the process. When using filesystem operations from multiple threads, it is therefore highly recommended to use absolute rather than relative FilePaths.