class Widgets::Systemd

Show the status of a systemd unit.

service:: what service?
user:: user service?

Example:

# display collectd.service status
widget :systemd, service: "collectd.service"

# control gammastep as an icon
widget :systemd, user: true, service: "gammastep.service" do
  case @unit["ActiveState"]
  when "active" then "🕯️"
  else "☀️"
  end
end

Public Class Methods

get_manager (user=false)

Source

# File src/widgets/systemd.rb, line 72
def self.get_manager user=false
    bus = user ? DBus.session_bus : DBus.system_bus
    systemd = bus.service("org.freedesktop.systemd1")
    manager = systemd.object("/org/freedesktop/systemd1")
    
    manager.introspect
    manager["org.freedesktop.systemd1.Manager"]
end

get_status_icon (unit)

Source

# File src/widgets/systemd.rb, line 45
def self.get_status_icon unit
    case unit["ActiveState"]
    when "active" then "✅"
    when "reloading" then "⟳"
    when "failed" then "💀"
    when "inactive" then "❌"
    when "activating" then "⚡"
    when "deactivating" then "💤" # moon or zzz?
    end
end

A function that uses a units ActiveState to return an emoji.

Feel free to use this with your custom formatters!

get_unit (unit_name, user=false)

Source

# File src/widgets/systemd.rb, line 81
def self.get_unit unit_name, user=false
    bus = user ? DBus::SessionBus.instance : DBus::SystemBus.instance
    systemd = bus.service("org.freedesktop.systemd1")
    manager = systemd.object("/org/freedesktop/systemd1")
    
    manager.introspect
    manager.default_iface = "org.freedesktop.systemd1.Manager"

    manager = self.get_manager user

    unit = systemd.object(manager.LoadUnit(unit_name).first)
    unit.introspect

    unit["org.freedesktop.systemd1.Unit"]
end

new (options)

Source

# File src/widgets/systemd.rb, line 27
def initialize options
    raise "No service provided" unless options[:service]
    options[:cursor] ||= :pointer
    super
    @unit = Widgets::Systemd.get_unit options[:service], options[:user]
    @label = Gtk::Label.new ''
    append @label
    update_safe
    @click_controller.signal_connect("pressed") { Widgets::Systemd.toggle @unit; update_safe }
    @manager = Widgets::Systemd.get_manager options[:user]
    @manager.Subscribe() rescue "systemd: Failed to subscribe"
    @manager.on_signal("JobRemoved") { |id, job, unit, result| update_safe }
    @manager.on_signal("JobNew") { |id, job, unit, result| update_safe }
    options[:user] ? DBus.session_bus.glibize : DBus.system_bus.glibize
end

Calls superclass method Widgets::BaseWidget::new

toggle (unit)

Source

# File src/widgets/systemd.rb, line 60
def self.toggle unit
  begin
    if unit["ActiveState"] == "active"
        unit.Stop "replace"
    else
        unit.Start "replace"
    end
  rescue => ex
    warn ex
  end
end

Public Instance Methods

update ()

Source

# File src/widgets/systemd.rb, line 56
def update
    @label.set_text(instance_exec(&@proc) || "#{@options[:service]} #{Widgets::Systemd.get_status_icon(@unit)}")
end