From: Shea Martin <null@...0>
Date: 2006-03-23T06:04:19+09:00
Subject: Re: IO#popen and exit status

Shea Martin wrote:
> Andrew Johnson wrote:
>> On Tue, 21 Mar 2006 01:20:36 +0900, Claudio Jeker
>> <cjeker@diehard.n-r-g.com> wrote:
>>
>> [snip]
>>> Now I can IO.popen the process but there is no pclose instance method to
>>> get the exitcode back. Additionally my workaround via 
>>> Process.waitpid2 does
>>> not work either. I think io.close does already all the cleanup.
>>
>> The $? variable will hold the exit status of the last child to terminate.
>>
>> andrew
>>
> $? does not work with popen, or open3.  I am not sure why one would want 
> to run a  process, and monitor the output, yet not care what the exit 
> status is?  One would think that this oversite will be fixed in future 
> releases.
> 
> ~S
ps - you can call Process.wait to update $?, but it is not reliable if 
your program is multi threaded.