qemu.rb

#!/usr/bin/env ruby
#######################################################
# Call qemu without having to remember stupid options.#
#######################################################
require 'yaml'
$qemu = "qemu-system-i386"
config = File.open("/home/michael/.qemu.yaml") {|yf| YAML::load(yf) }
def parse_machine(config,machine)
  x = config["machines"][machine].each_pair.map.reduce "" do |acc,key|
    case key[0]
    when :mem
      acc += (" -m " + key[1].to_s)
    when :hda
      acc += (" -hda " + config["hddir"] + key[1].to_s)
    when :hdb
      acc += (" -hdb " + config["hddir"] + key[1].to_s)
    when :cd
      acc += (" -cdrom " + Dir[config["cddir"] + key[1].to_s])
    when :opts
      acc += (" " + key[1].to_s + " ")
    when :port
      acc += "-redir tcp:" + (key[1] + 26000).to_s + "::22 -vnc :" + key[1].to_s + " "
    when :vesa
      if key[1] then acc += " -std-vga " end
    when :localtime
      if key[1] then acc += " -localtime " end
    when :kqemu
      if key[1] then acc += " -kernel-kqemu " end
    when :arch
      if key[1] == "i386" || key[1] == "x86" then
        $qemu = "qemu-system-i386"
        return acc
      elsif key[1] == "x86_64" || key[1] == "amd64" then
        $qemu = "qemu-system-x86_64"
        return acc
      else
        puts "Unrecognized architecture: " + key[1].to_s
        abort
      end
    else
      puts "Unrecognized option: " + key[0].to_s
      abort
    end
  end
  return x
end
if config["machines"].has_key? ARGV[0] then
  %x{ #{$qemu + " " + parse_machine(config,ARGV[0]) + " &"} }
end

qemu.yaml

hddir: /store/qemu/hd/
cddir: /store/qemu/cdrom/
machines:
  openbsd:
    :mem: 64
    :port: 3
    :hda: openbsd.img
    :arch: i386
  xo: 
    :mem: 128
    :port: 13
    :vesa: true
    :hda: xo.img
    :arch: i386
  debian: 
    :mem: 256
    :port: 0
    :vesa: true
    :arch: i386
    :hda: debian.img
  winxp:
    :mem: 256
    :port: 11
    :localtime: true
    :vesa: true
    :hda: winxp.img
    :arch: i386
  syllable: 
    :mem: 128
    :port: 8
    :vesa: true
    :hda: syllable.img
    :arch: i386
  win2k: 
    :mem: 64
    :port: 12
    :hda: win2k.img
    :arch: i386
  arch: 
    :mem: 256
    :port: 5
    :kqemu: true
    :hda: arch.img
    :arch: x86_64
    :hdb: linux_btrfs.img
  deb-kfbsd: 
    :mem: 64
    :port: 6
    :hda: deb-kfbsd.img
    :arch: i386
  dflybsd: 
    :mem: 128
    :port: 2
    :localtime:
    :hda: dflybsd.img
    :arch: i386
  plan9: 
    :mem: 32
    :port: 10
    :hda: plan9.img
    :arch: i386
  freedos: 
    :mem: 16
    :port: 7
    :hda: freedos.img
    :arch: i386
  gentoo: 
    :mem: 256
    :port: 4
    :kqemu: true
    :vesa: true
    :hda: gentoo.img
    :arch: x86_64
  puppy: 
    :mem: 256
    :port: 9
    :arch: i386
    :cd: puppy.iso
  freebsd: 
    :mem: 128
    :port: 1
    :hda: freebsd.img
    :arch: i386