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

Shea Martin wrote:
> 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)}"
> }
that should be #{Process.waitpid2(p.pid)[1].exitstatus}