System.IO.TailFile

Tail files in Linux.

The functions in this module do not use any particular streaming library. They just accept an initial state and a monadic update function.

Documentation

tailFile

Arguments

:: FilePath

-> (a -> ByteString -> IO a)

State update function.

-> IO a

Monadic action for getting the initial state.

-> IO void

The result action never returns!

Tail a file, while keeping an internal state.

If the file doesn't exist, tailFile will poll for it until it is found.

If tailFile detects the file has been moved or renamed, it goes back to watching a file with the original name.

tailFile also detects file truncations, in which case it starts reading again from the beginning.

Data already existing in the file before tailFile is invoked is ignored.