From: Daniel Bretoi <lists@...>
Date: 2003-04-08T02:40:05+09:00
Subject: Re: exit status from popen3: popen3 bug?

I did yet another test:

[~]$ ./popen.rb 
/etc/passwd
0

[~]$ cat popen.rb 
#!/usr/bin/ruby -w

IO.popen("ls /etc/passwd") { |out|
  out.each { |o| puts o }
}
puts $? >> 8


[~]$ ./popen3.rb 
/etc/passwd
255

[~]$ cat popen3.rb 
#!/usr/bin/ruby -w

require 'open3'
Open3.popen3("ls /etc/passwd") { |sin,out,err|
  out.each { |o| puts o }
}
puts $? >> 8


As you can see, popen3 doesn't handle the exit status like popen does.
Is this a bug?

db


On Tue, Apr 08, 2003 at 02:28:41AM +0900, Daniel Bretoi wrote:
> I'd like to add that the exit status here is ALWAYS 255, no matter wht
> the command is.
> 
> db
> 
> On Tue, Apr 08, 2003 at 01:56:11AM +0900, Daniel Bretoi wrote:
> > Hi,
> > 
> > For some reason the code I had posted earlier did not always work
> > correctly. I've now rearrange the code to work properly as far as
> > running, however, now I can't seem to capture the exit status.
> > 
> > Help?
> > 
> > def doit(command)
> >    logfile = "test"
> >    threads = []
> >    fh = File.open(logfile,"w")
> >    Open3.popen3(command) { |inp,out,err|
> > 
> >       threads <<  Thread.new(out) { |out|
> >          out.each { |line| puts line; fh.print line }
> >       }
> >       threads <<  Thread.new(err) { |err|
> >          err.each { |line| puts line; fh.print line }
> >       }
> >       threads.each { |t| t.join }
> >    }
> >    stat = $? >> 8
> >    fh.close
> >    stat
> > end
> > 
> > 
> > -- 
> > Apr  7 	IBM announces System/360, 1964
> > Apr  7 	Albert Hofmann synthesizes LSD in Switzerland, 1943
> > Apr  7 	Alewives run, Cape Cod
> > Apr  7*	Omer 10th day
> 
> -- 
> Apr  7 	IBM announces System/360, 1964
> Apr  7 	Albert Hofmann synthesizes LSD in Switzerland, 1943
> Apr  7 	Alewives run, Cape Cod
> Apr  7*	Omer 10th day

-- 
Apr  7 	IBM announces System/360, 1964
Apr  7 	Albert Hofmann synthesizes LSD in Switzerland, 1943
Apr  7 	Alewives run, Cape Cod
Apr  7*	Omer 10th day