System.Process.Common

Documentation

class Monoid b => ProcessOutput a b | b -> a where

Methods

pidf :: ProcessHandle -> b

outf :: a -> b

errf :: a -> b

intf :: SomeException -> b

codef :: ExitCode -> b

Instances

ListLikeProcessIO a c => ProcessOutput a [Chunk a]

ListLikeProcessIO a c => ProcessOutput a (ExitCode, [Chunk a])

ListLikeProcessIO a c => ProcessOutput a (ExitCode, a, a)

class ListLikeIO a c => ListLikeProcessIO a c where

Methods

forceOutput :: a -> IO a

readChunks :: Handle -> IO [a]

Read from a handle, returning a lazy list of the monoid a.

Instances

ListLikeProcessIO String Char

Like readProcessWithExitCode that takes a CreateProcess.

ListLikeProcessIO ByteString Word8

Like readProcessWithExitCode, but using ByteString

ListLikeProcessIO ByteString Word8

Like readProcessWithExitCode, but using ByteString

ListLikeProcessIO Text Char

Like readProcessWithExitCode, but using Text

ListLikeProcessIO Text Char

Like readProcessWithExitCode, but using Text

readProcessWithExitCode

Arguments

:: ListLikeProcessIO a c

=> FilePath

command to run

-> [String]

any arguments

-> a

standard input

-> IO (ExitCode, a, a)

exitcode, stdout, stderr

Like readProcessWithExitCode, but with generalized input and output type.

readCreateProcessWithExitCode

Arguments

:: ListLikeProcessIO a c

=> CreateProcess

command and arguments to run

-> a

standard input

-> IO (ExitCode, a, a)

exitcode, stdout, stderr

readCreateProcess :: (ProcessOutput a b, ListLikeProcessIO a c) => CreateProcess -> a -> IO b

readCreateProcessLazy :: (ProcessOutput a b, ListLikeProcessIO a c) => CreateProcess -> a -> IO b

Like readCreateProcess, but the output is read lazily.

readInterleaved :: (ListLikeProcessIO a c, ProcessOutput a b) => [(a -> b, Handle)] -> IO b -> IO b

Helper function for readCreateProcessLazy.

readInterleaved' :: forall a b c. (ListLikeProcessIO a c, ProcessOutput a b) => [(a -> b, Handle)] -> IO b -> MVar (Either Handle b) -> IO b

writeInput :: ListLikeProcessIO a c => Handle -> a -> IO ()

Write and flush process input, closing the handle when done. Catch and ignore Resource Vanished exceptions, they just mean the process exited before all of its output was read.

resourceVanished :: (IOError -> IO a) -> IOError -> IO a

Wrapper for a process that provides a handler for the ResourceVanished exception. This is frequently an exception we wish to ignore, because many processes will deliberately exit before they have read all of their input.