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This problem also pops up if a linked-in driver has any usage of
stdout. For some reason there is usage of '\r\n' as newlines within
the erlang VM somewhere, which seems very awkward when running on
unix/linux.<br>
<br>
On 08/09/2012 10:24 AM, Ashwin Mangale wrote:
<blockquote
cite="mid:CAKrAB_qphJGCGZg1u87xALLmXaxJnt=4d=pd_FXiCEZTKBycWg@mail.gmail.com"
type="cite">
<meta http-equiv="Context-Type" content="text/html;
charset=ISO-8859-1">
Hi,<br>
<br>
Instead of:<br>
io:format(user, "foo\nbar\nbaz", []).<br>
<br>
Try:<br>
io:format(user, "foo\r\nbar\r\nbaz", []). <br>
<br>
<br>
This should give the proper formatted output.<br>
<br>
Regards,<br>
Ashwin<br>
<br>
<div>On Thu, Aug 9, 2012 at 10:47 PM, José Valim <span><<a
moz-do-not-send="true" href="mailto:jose.valim@gmail.com">jose.valim@gmail.com</a>></span>
wrote:<br>
<blockquote>More info:
<div><br>
</div>
<div>Running on Mac OS Snow Leopard, Erlang R15B or R15B01.</div>
<div><br>
</div>
<div>user_drv:start() is spawning user:start() and not 'tty -c
-e'.
<div>
<br>
<div><br>
</div>
<div><br>
</div>
<span><b><span>
<div><span><b>José Valim</b></span></div>
<div><span>
<div><span><a moz-do-not-send="true"
href="http://www.plataformatec.com.br/">www.plataformatec.com.br</a></span></div>
<div><span>Founder and Lead Developer</span></div>
</span></div>
</span></b></span><br>
<br>
<br>
</div>
<div>
<div>
<div>On Thu, Aug 9, 2012 at 2:07 PM, José Valim <span><<a
moz-do-not-send="true"
href="mailto:jose.valim@gmail.com">jose.valim@gmail.com</a>></span>
wrote:<br>
<blockquote>
Hello everyone,
<div><br>
</div>
<div>If I run the following command:</div>
<div><br>
</div>
<blockquote>
<div> $ erl -noinput -s user_drv </div>
</blockquote>
<div><br>
</div>
And then try to send any io message to the user
process, the message appears skewed:
<div><br>
</div>
<blockquote>
<div> 1> io:format(user, "foo\nbar\nbaz", []).
</div>
</blockquote>
<blockquote>
<div>
<div>
<div> foo </div>
</div>
</div>
<div>
<div>
<div> bar </div>
</div>
</div>
<div>
<div>
<div> bazok </div>
</div>
</div>
</blockquote>
<div>
<div><br>
<div>However, sending the message to io makes it
appear correctly:</div>
<div><br>
</div>
</div>
</div>
<blockquote>
<div>
<div>
<div>
<div> 2> io:format(standard_io,
"foo\nbar\nbaz", []). </div>
</div>
</div>
</div>
<div>
<div>
<div> foo </div>
</div>
</div>
<div>
<div>
<div> bar </div>
</div>
</div>
<div>
<div>
<div> bazok </div>
</div>
</div>
</blockquote>
<div>
<div><br>
</div>
<div>This becomes a major problem when printing
error logger messages to tty, which become
completely unreadable.</div>
<div><br>
</div>
<div>I have found out this issue when starting an
Elixir shell with user_drv.</div>
<div>The issue also appears with LFE and any other
time user_drv is started manually.</div>
<div><br>
</div>
<div>Does anyone know a fix to this problem or how
I could debug it further?</div>
<span>
<div>
<br>
</div>
<span><b><span>
<div>
<span><b>José Valim</b></span></div>
<div><span>
<div><span><a moz-do-not-send="true"
href="http://www.plataformatec.com.br/">www.plataformatec.com.br</a></span></div>
<div><span>Founder and Lead Developer</span></div>
</span></div>
</span></b></span><br>
</span></div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
<br>
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</blockquote>
</div>
<br>
<br>
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