From: Daniel Bretoi <lists@...>
Date: 2003-01-24T08:33:11+09:00
Subject: Re: exit status, stderr and stdout

In perl, I was able to do this,

   my $pid = open3($wtr, $rdr, $err, "ls ---");
waitpid($pid,WNOHANG);
warn $? >> 8;

however, looking at the code for open3.rb it doesn't seem possible to
capture the pid (infact, it seems to be completely discarded).

Does anyone know the reason for this?

db

On Fri, Jan 24, 2003 at 07:45:15AM +0900, nobu.nokada@softhome.net wrote:
> Hi,
> 
> At Fri, 24 Jan 2003 07:26:34 +0900,
> Daniel Bretoi wrote:
> > min,out,err = Open3.popen3("ls ---");
> 
> Did you "Process.wait" here?
> 
> > p  $? >> 8
> > 
> > => 255
> 
> $ ruby -ropen3 -e 'min,out,err = Open3.popen3("ls ---");p $?'
> nil
> [nobu@sharui:~/src/ruby/rough/lib/testunit 07:42:40]
> $ ruby -ropen3 -e 'min,out,err = Open3.popen3("ls ---");Process.wait;p $?>>8'
> 1
> 
> $? won't be set until Process.wait return.
> 
> -- 
> Nobu Nakada

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