#!/usr/bin/env ruby
require 'net/smtp'
require 'nkf'
from = `echo $USER | uname2mail.rb`.chomp
/@/ !~ from and abort "Who are you(may not have email)"
body = STDIN.read
charset = case NKF.guess(body)
          when NKF::UTF8
            "UTF-8"
          when NKF::JIS
            "ISO-2022-JP"
          else
            "BINARY"
          end

rcpt = []
while ARGV[0]
  case ARGV[0]
  when "-s"
    subj = ARGV[1] ;ARGV.shift
  else
    rcpt << ARGV[0]
  end
  ARGV.shift
end

Net::SMTP.start('smtp', 25) {|smtp|
  smtp.send_message(<<-EndOfMail, from, rcpt)
From: #{from}
To: #{rcpt.join(",")}
Subject: #{subj}
Date: `LANG=C date`
Content-type: text/plain; charset=#{charset}
Mime-Version: 1.0

#{body}
  EndOfMail
}