From: Martin Kaletsch <mano_mk@...>
Date: 2005-01-12T22:21:17+09:00
Subject: Re: return code from Open3.popen?

Daniel Berger wrote:


>> Is there a (non-hackish) way to get the error code from
> Open3.popen()?
>> The only way I seem to be able to do it currently is by appending
> "echo
>> $?" to the command, and parsing it out of stdout.  $?.exitstatus
> contains
>> some random value.
> 
> The normal way of getting an error out of Open3.popen3 is to check the
> STDERR handle:
> 
> fin, fout, ferr = Open3.popen3("ls")
> error = ferr.gets
> if error
> puts "Error: " + error.to_s # There was an error
> end

I know of at least one programm using stderr for output even when execution
was successfull! 

-- 
Martin Kaletsch