Re: io:get_chars no longer respecting Control-D (eof) in Erlang 18.1

Tony Wallace <[email protected]> Fri, 19 Feb 2016 16:26:17 +1300
Newsgroups	gmane.comp.lang.erlang.bugs
Message-ID	<[email protected]>
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My apologies.  Not sure why I had problems (yet) but it is not
an erlang bug.


Tony


-------- Forwarded Message --------
Subject: 	io:get_chars no longer respecting Control-D (eof) in Erlang 18.1
Date: 	Thu, 18 Feb 2016 22:43:36 +1300
From: 	Tony Wallace <[email protected]>
To: 	[email protected]



The task is to produce an escript that reads standard input.  The code
that used to work was:


read_stdin() ->
    lists:flatten(read_stdin(io:get_chars(standard_io,"",8192))).
read_stdin(eof) ->
    [];
read_stdin(Data) ->
    [Data|read_stdin(io:get_chars(standard_io,"",8192))].


Now this code causes the program to hang.  If I try the following
command from the erlang prompt:

2> io:get_chars("",10).


and then try to end the input with control-D the command does not
return.  It could be a problem with
the shell intercepting the control-D or io:get_chars could be broken.

Tony Wallace





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    My apologies.=C2=A0 Not sure why I had problems (yet) but it is not<b=
r>
    an erlang bug.<br>
    <br>
    <br>
    Tony<br>
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            <th nowrap=3D"nowrap" valign=3D"BASELINE" align=3D"RIGHT">Sub=
ject:
            </th>
            <td>io:get_chars no longer respecting Control-D (eof) in
              Erlang 18.1</td>
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            <th nowrap=3D"nowrap" valign=3D"BASELINE" align=3D"RIGHT">Dat=
e: </th>
            <td>Thu, 18 Feb 2016 22:43:36 +1300</td>
          </tr>
          <tr>
            <th nowrap=3D"nowrap" valign=3D"BASELINE" align=3D"RIGHT">Fro=
m: </th>
            <td>Tony Wallace <a class=3D"moz-txt-link-rfc2396E" href=3D"m=
ailto:[email protected]">&lt;[email protected]&gt;</a></td>
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          <tr>
            <th nowrap=3D"nowrap" valign=3D"BASELINE" align=3D"RIGHT">To:=
 </th>
            <td><a class=3D"moz-txt-link-abbreviated" href=3D"mailto:erla=
[email protected]">[email protected]</a></td>
          </tr>
        </tbody>
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      <br>
      <br>
      <pre>The task is to produce an escript that reads standard input.  =
The code
that used to work was:


read_stdin() -&gt;
    lists:flatten(read_stdin(io:get_chars(standard_io,"",8192))).
read_stdin(eof) -&gt;
    [];
read_stdin(Data) -&gt;
    [Data|read_stdin(io:get_chars(standard_io,"",8192))].


Now this code causes the program to hang.  If I try the following
command from the erlang prompt:

2&gt; io:get_chars("",10).


and then try to end the input with control-D the command does not
return.  It could be a problem with
the shell intercepting the control-D or io:get_chars could be broken.

Tony Wallace


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