From: inspire <inspire22@...>
Date: 2008-07-10T10:41:15+09:00
Subject: Re: IO.select timeout problem

I'm having this same problem - wish I had a better solution to offer
you!  Perhaps it's just broken this version of linux, or something
more complicated in the code is causing problems..

Linux 2.6.18

It must be something more complicated in the code ,as this works fine:
loop do
 while result = select([], nil, nil, 0.25)
  puts "GOT RESULT";
 end
 puts "looped"
end

Ciao,
Kevin

sgibson wrote:
> Using ruby 1.8.6 under Linux.  For some reason IO.select() seems to be
> ignoring the 'timeout' parameter.  Regardless of what value I put in
> there (float or integer) it doesn't seem to have any effect -- if
> there isn't any data available on stdout or stderr, select() just
> waits until there is data:
>
> @stdin, @stdout, @stderr = Open3.popen3("./myprog")
> return_data = ""
> loop do
>   while result = select([@stdout, @stderr], nil, nil, 0.25)
>     for data in result[0]
>       if data == @stdout
>         return_data = return_data + @stdout.gets
>         logit("debug: return_data = " + return_data)
>       elsif data == @stderr
>         return_data = return_data + @stderr.gets
>       end
>     end # for
>   end # while
>   logit("debug: timed out -- waiting for data...")
>   if return_data != ""
>     send_to_user(return_data)
>     return_data = ""
>   end
> end # loop
>
>
> Am I missing something?
>
> -Steve