Class: QEMU::Command

Inherits:
Object
  • Object
show all
Defined in:
lib/qemu/command.rb

Defined Under Namespace

Classes: Disk, Disks

Constant Summary collapse

@@command_system_aliases = 
{
  "amd64" => "x86_64"
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#alsa_adc_dev ⇒ Object

Returns the value of attribute alsa_adc_dev.



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# File 'lib/qemu/command.rb', line 79

def alsa_adc_dev
  @alsa_adc_dev
end

#alsa_dac_dev ⇒ Object

Returns the value of attribute alsa_dac_dev.



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# File 'lib/qemu/command.rb', line 79

def alsa_dac_dev
  @alsa_dac_dev
end

#architecture ⇒ Object

Returns the value of attribute architecture.



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# File 'lib/qemu/command.rb', line 12

def architecture
  @architecture
end

#audio_driver ⇒ Object

Returns the value of attribute audio_driver.



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# File 'lib/qemu/command.rb', line 74

def audio_driver
  @audio_driver
end

#disks ⇒ Object (readonly)

Returns the value of attribute disks.



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# File 'lib/qemu/command.rb', line 18

def disks
  @disks
end

#mac_address ⇒ Object

Returns the value of attribute mac_address.



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# File 'lib/qemu/command.rb', line 52

def mac_address
  @mac_address
end

#memory ⇒ Object

Returns the value of attribute memory.



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# File 'lib/qemu/command.rb', line 10

def memory
  @memory
end

#monitor ⇒ Object

Returns the value of attribute monitor.



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# File 'lib/qemu/command.rb', line 61

def monitor
  @monitor
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/qemu/command.rb', line 4

def name
  @name
end

#sound_hardware ⇒ Object

Returns the value of attribute sound_hardware.



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# File 'lib/qemu/command.rb', line 73

def sound_hardware
  @sound_hardware
end

#telnet_port ⇒ Object

Returns the value of attribute telnet_port.



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# File 'lib/qemu/command.rb', line 62

def telnet_port
  @telnet_port
end

#usb ⇒ Object

Returns the value of attribute usb.



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# File 'lib/qemu/command.rb', line 81

def usb
  @usb
end

#vde_options ⇒ Object

Returns the value of attribute vde_options.



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# File 'lib/qemu/command.rb', line 54

def vde_options
  @vde_options
end

#vnc ⇒ Object

Returns the value of attribute vnc.



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# File 'lib/qemu/command.rb', line 59

def vnc
  @vnc
end

Instance Method Details

#command ⇒ Object 



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# File 'lib/qemu/command.rb', line 120

def command
  system = @@command_system_aliases.fetch(architecture.to_s, architecture.to_s)
  "/usr/bin/qemu-system-#{system}"
end

#command_arguments ⇒ Object 



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# File 'lib/qemu/command.rb', line 83

def command_arguments
  [].tap do |args|
    args << "-enable-kvm"

    args << "-m" << memory.to_s if memory
    disks.each_with_index do |disk, index|
      args << "-drive" << disk.qemu_drive(index)
    end
    args << "-net" << "nic,macaddr=#{mac_address}"
    unless vde_options.empty?
      args << "-net" << "vde," + vde_options.map { |k,v| "#{k}=#{v}" }.join(',')
    end
    if vnc
      args << "-vnc" << vnc
    else
      args << "-nographic"
    end

    args << "-usb" if usb

    args << "-monitor" << monitor if monitor
    args << "-soundhw" << sound_hardware if sound_hardware
  end
end

#command_env ⇒ Object 



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# File 'lib/qemu/command.rb', line 108

def command_env
  {}.tap do |env|
    env["QEMU_AUDIO_DRV"] = audio_driver
    env["QEMU_ALSA_DAC_DEV"] = alsa_dac_dev if alsa_dac_dev
    env["QEMU_ALSA_ADC_DEV"] = alsa_adc_dev if alsa_adc_dev
  end
end

#daemon ⇒ Object 



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# File 'lib/qemu/command.rb', line 130

def daemon
  @daemon ||=
    begin
      QEMU.logger.debug "Prepare daemon with '#{command_arguments.join(' ')}'"
      Daemon.new :command => command, :name => name, :arguments => command_arguments, :env => command_env
    end
end

#qemu_monitor ⇒ Object 



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# File 'lib/qemu/command.rb', line 69

def qemu_monitor
  @qemu_monitor ||= QEMU::Monitor.new :port => telnet_port if telnet_port
end

#run ⇒ Object 



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# File 'lib/qemu/command.rb', line 125

def run
  shell_env = command_env.map { |k,v| "#{k}=#{v}" }.join(' ')
  system "#{shell_env} #{command} #{command_arguments.join(' ')}"
end