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1. readProcessWithExitCode :: FilePath -> [String] -> String -> IO (ExitCode, String, String)

   io-streams	System.IO.Streams.Process

   readProcessWithExitCode is like readProcess but with two differences:

   • it returns the ExitCode of the process, and does not throw any exception if the code is not ExitSuccess.
   • it reads and returns the output from process' standard error handle, rather than the process inheriting the standard error handle.
   On Unix systems, see waitForProcess for the meaning of exit codes when the process died as the result of a signal.

2. readFile :: FilePath -> IO String

   strict	System.IO.Strict

   The readFile function reads a file and returns the contents of the file as a string. The file is read strictly, as with getContents.

3. readFromPathPiece :: Read s => Text -> Maybe s

   path-pieces	Web.PathPieces

   A function for helping generate free PathPiece instances for enumeration data types that have derived Read and Show instances. Intended to be used like this:

   data MyData = Foo | Bar | Baz
   deriving (Read,Show)
   instance PathPiece MyData where
   fromPathPiece = readFromPathPiece
   toPathPiece = showToPathPiece
   

   Since 0.2.1.

4. readWriteMode :: TransactionMode -> !ReadWriteMode

   postgresql-simple	Database.PostgreSQL.Simple.Transaction

   No documentation available.

5. readSettingsFile :: Maybe FilePath -> String -> IO (FilePath, Maybe String)

   hlint	Language.Haskell.HLint

   Given a directory (or Nothing to imply getHLintDataDir), and a module name (e.g. HLint.Default), find the settings file associated with it, returning the name of the file, and (optionally) the contents. This function looks for all settings files starting with HLint. in the directory argument, and all other files relative to the current directory.

6. readFileBinary :: MonadIO m => FilePath -> m ByteString

   rio	RIO

   Same as readFile, but generalized to MonadIO

7. readFileUtf8 :: MonadIO m => FilePath -> m Text

   rio	RIO

   Read a file in UTF8 encoding, throwing an exception on invalid character encoding. This function will use OS-specific line ending handling.

8. readSomeRef :: MonadIO m => SomeRef a -> m a

   rio	RIO

   Read from a SomeRef

9. readURef :: (PrimMonad m, Unbox a) => URef (PrimState m) a -> m a

   rio	RIO

   Read the value in a URef

10. readFile :: MonadIO m => FilePath -> m ByteString

    rio	RIO.ByteString

    Lifted readFile

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