Mac pbcopy helper

.screenrc

bufferfile "$HOME/screen-exchange"
bind  ^] eval 'writebuf -e utf8' 'exec sh -c "cat ~/screen-exchange | ~/invoke-pbcopy.sh"' 'echo pasted.'

invoke-pbcopy.rb

#!/bin/sh

function concat_passphrase()
{
    echo 'SECRET-PASSPHRASE'
    cat -
}

concat_passphrase | nc -w1 localhost 12345

pbcopy.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
     <key>Label</key>
     <string>localhost.pbcopy</string>
     <key>ProgramArguments</key>
     <array>
         <string>/Users/yuryu/safe-pbcopy.rb</string>
     </array>
     <key>inetdCompatibility</key>
     <dict>
          <key>Wait</key>
          <false/>
     </dict>
     <key>Sockets</key>
     <dict>
          <key>Listeners</key>
               <dict>
                    <key>SockServiceName</key>
                    <string>12345</string>
                    <key>SockNodeName</key>
                    <string>127.0.0.1</string>
               </dict>
     </dict>
</dict>
</plist>

safe-pbcopy.rb

#!/usr/bin/ruby

SHARED_KEY = 'SECRET-PASSPHRASE';

key = gets
exit if key.chomp != SHARED_KEY

IO.popen('sh -c "LANG=en_us.UTF-8 pbcopy"', 'w') do |pb|
	while line = gets
		pb.puts line
	end
end

sshconfig

Host *
    RemoteForward 12345 localhost:12345