Question

Ruby’s standard popen3 module does not work on Windows. Is there a maintained replacement that allows for separating stdin, stdout, and stderr?

Answer 1

POpen4 gem has a common interface between unix and Windows. The following example (from their website) works like a charm.

require 'rubygems' require 'popen4'  status =   POpen4::popen4('cmd') do |stdout, stderr, stdin, pid|     stdin.puts 'echo hello world!'     stdin.puts 'echo ERROR! 1>&2'     stdin.puts 'exit'     stdin.close      puts 'pid        : #{ pid }'     puts 'stdout     : #{ stdout.read.strip }'     puts 'stderr     : #{ stderr.read.strip }'   end  puts 'status     : #{ status.inspect }' puts 'exitstatus : #{ status.exitstatus }'