如何从Windows上的Ruby运行非ASCII / Unicode shell命令？

# encoding: utf-8

def test(word)
  returned = `echo #{word}`.chomp
  puts "#{word} == #{returned}"
  raise "Cannot roundtrip #{word}" unless word == returned
end

test "good"

test "b?d"

puts "Success"

# win7,cmd.exe font set to Lucinda Console,chcp 65001
# good == good
# b?d == b??d

这是Ruby中的错误,还是我需要手动将命令字符串编码为特定的编码,然后才能传递给cmd.exe进程？

更新：我想清楚地说明问题不在于将输出读回Ruby,而是纯粹将命令发送到shell.展示：

# encoding: utf-8

File.open("bbb?d.txt","w") do |f|
  f.puts "nothing to see here"
end

filename = Dir.glob("bbb*.txt").first
command = "attrib #{filename}"

puts command.encoding

puts "#{filename} exists?: #{ File.exists?(filename) }"
system command
File.delete(filename)

#=>
# UTF-8
# bbb?d.txt exists?: true
# File not found - bbb??d.txt

您可以看到文件是否正确创建,File.exists？方法确认Ruby可以看到它,但是当我尝试在其上运行attrib命令时,它试图使用不同的文件名.