From: Robert Klemme <shortcutter@...>
Date: 2013-05-28T00:33:02+09:00
Subject: Re: Wrong child process exit status if core dump / seg fault

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On Mon, May 27, 2013 at 4:58 PM, Alexander Schaal <lists@ruby-forum.com>wrote:

> I think I almost understand the problem. :-)
>
> $?.to_i shows me the raw 16 bit status. In theory. In my case the status
> has 24 bit!
>
> To be more precise, in my case the value is 0x860000.
>
> --> The low byte are states like "signaled", "exited", etc... which are
> all 0.
> --> The high byte is the exit code. I think ruby reads ONLY the second
> byte, which is 0. But my exit code is 0x8600 (core dump).
>
> Yeah, to get the real exit code, I can use
>
>    $?.to_i >> 8
>

I would not normally use #to_i here since it's too unspecific.  Did you
look at the documentation of Process::Status?  Did you use methods
#exitstatus and #termsig?


> Is this a bug?


Good question.  Could well be that it's a bug in the platform build you
have.  As I said, with other platforms it works.

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On Mon, May 27, 2013 at 4:58 PM, Alexander Schaal <span dir=3D"ltr"=
>&lt;<a href=3D"mailto:lists@ruby-forum.com" target=3D"_blank">lists@ruby-f=
orum.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">I think I almost understand the problem. :-)=
<br>
<br>
$?.to_i shows me the raw 16 bit status. In theory. In my case the status<br=
>
has 24 bit!<br>
<br>
To be more precise, in my case the value is 0x860000.<br>
<br>
--&gt; The low byte are states like &quot;signaled&quot;, &quot;exited&quot=
;, etc... which are<br>
all 0.<br>
--&gt; The high byte is the exit code. I think ruby reads ONLY the second<b=
r>
byte, which is 0. But my exit code is 0x8600 (core dump).<br>
<br>
Yeah, to get the real exit code, I can use<br>
<br>
=A0 =A0$?.to_i &gt;&gt; 8<br></blockquote><div><br></div><div style>I would=
 not normally use #to_i here since it&#39;s too unspecific. =A0Did you look=
 at the documentation of Process::Status? =A0Did you use methods #exitstatu=
s and #termsig?</div>
<div style>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Is this a bug?</blockquote><div><br></div><div style>Good question. =A0Coul=
d well be that it&#39;s a bug in the platform build you have. =A0As I said,=
 with other platforms it works.=A0</div></div><div><br></div><div style>Kin=
d regards</div>
<div style><br></div><div style>robert</div><div style><br></div>-- <br>rem=
ember.guy do |as, often| as.you_can - without end<br><a href=3D"http://blog=
.rubybestpractices.com/">http://blog.rubybestpractices.com/</a>
</div></div>

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