From: Shea Martin <null@...0>
Date: 2006-03-23T06:13:51+09:00
Subject: Re: Return code of process from IO

Shea Martin wrote:
> Farrel Lifson wrote:
>> Just solved it. Just run Process.wait after the call to the IO.popen
>> and $? gets updated.
> 
> This doesn't work in this case:
> 
> #!/usr/bin/ruby
> 
> Thread.new{
>   IO.popen('ls non_existant_dir').each_line{|l| puts l}
>   sleep 10
>   Process.wait
>   puts "exit status is #{$?}, should be non-zero"
> }
> 
> sleep 5
> 
> Thread.new{
>   IO.popen('dir').each_line{|l| puts l}
>   Process.wait
>   puts "exit status is #{$?}, should be 0"
> }
> 
> sleep 15
> 
> exit 0
> 
> 
> ~S

This should work in a mt env.

IO.popen('dir') { |p|
	p.each_line{ |l| puts l }
	puts "exitstatus is #{Process.waitpid(p.pid)}"
}