在Mac OS X终端中使用ctrl + D时stdin的信号EOF不起作用 [英] signal EOF of stdin when in mac OS X terminal with ctrl+D doesn't work

问题描述

我使用的是Mac OS X EL机长，并尝试弄清楚如何发出EOF信号，但是ctrl + D不起作用.我已经在使用stty all的终端上确认eof = ^ D.

I am on a mac OS X EL Captain and try to figure out how to signal EOF , however ctrl + D doesn't work. I have confirmed with the terminal using stty all that eof = ^D.

在Haskell中使用以下代码

With the following code in Haskell

Module Input where

import Data.List
import Data.Char
import System.IO (isEOF)


main =
   interact (concat . sort . lines)

该表达式永远不会给我任何标准输出-我已经尝试过ctrl + d，但是什么也没有发生.为什么是这样?

The expression will never give me any stdout - I have tried ctrl+d , but nothing happens. Why is this?

我在GHCI中运行此程序

推荐答案

(注意:有关在GHCI中运行程序的问题.)

(Note: Question about running the program in GHCI.)

根据9年前的本TRAC问题，错误.

您可以hSetBuffer stdin LineBuffering并且Control-D将被识别，但是当GHCI返回REPL提示时，GHCI还将引发句柄关闭"错误，并且会话将终止:

You can hSetBuffer stdin LineBuffering and Control-D will be recognized, but GHCI will also raise a "handle is closed" error when it comes back to the REPL prompt and the session will terminate:

$ ghci  ./control-d.hs
GHCi, version 7.10.2: http://www.haskell.org/ghc/  :? for help
[1 of 1] Compiling Input            ( control-d.hs, interpreted )
Ok, modules loaded: Input.
*Input> import System.IO
*Input System.IO>  hSetBuffering stdin LineBuffering
*Input System.IO> :main
jhskdfjhdf
jhskdfjhdf<stdin>: hGetBuffering: illegal operation (handle is closed)
$

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