Class: Chef::Provider::Group::Dscl

Inherits:
Chef::Provider::Group show all
Defined in:
lib/chef/provider/group/dscl.rb

Instance Attribute Summary

Attributes inherited from Chef::Provider::Group

#change_desc, #group_exists

Attributes inherited from Chef::Provider

#action, #cookbook_name, #current_resource, #new_resource, #recipe_name, #run_context

Instance Method Summary collapse

Methods inherited from Chef::Provider::Group

#action_create, #action_manage, #action_modify, #action_remove, #compare_group, #has_current_group_member?, #initialize, #whyrun_supported?

Methods included from Mixin::Command

#chdir_or_tmpdir, #handle_command_failures, #output_of_command, #run_command, #run_command_and_return_stdout_stderr, #run_command_with_systems_locale

Methods included from Mixin::Command::Windows

#popen4

Methods included from Mixin::Command::Unix

#popen4

Methods inherited from Chef::Provider

#action_nothing, #cleanup_after_converge, #converge_by, #events, #initialize, #node, #process_resource_requirements, #requirements, #resource_collection, #resource_updated?, #run_action, #set_updated_status, #whyrun_mode?, #whyrun_supported?

Methods included from DSL::Recipe

#build_resource, #declare_resource, #describe_self_for_error, #evaluate_resource_definition, #has_resource_definition?, #have_resource_class_for?, #method_missing, #resource_class_for

Methods included from Mixin::ConvertToClassName

#convert_to_class_name, #convert_to_snake_case, #filename_to_qualified_string, #snake_case_basename

Constructor Details

This class inherits a constructor from Chef::Provider::Group

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Chef::DSL::Recipe

Instance Method Details

#create_group ⇒ Object 



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# File 'lib/chef/provider/group/dscl.rb', line 122

def create_group
  dscl_create_group
  set_gid
  set_members
end

#define_resource_requirements ⇒ Object 



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# File 'lib/chef/provider/group/dscl.rb', line 109

def define_resource_requirements
  super
  requirements.assert(:all_actions) do |a|
    a.assertion { ::File.exists?("/usr/bin/dscl") }
    a.failure_message Chef::Exceptions::Group, "Could not find binary /usr/bin/dscl for #{@new_resource.name}"
    # No whyrun alternative: this component should be available in the base install of any given system that uses it
  end
end

#dscl(*args) ⇒ Object 



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# File 'lib/chef/provider/group/dscl.rb', line 24

def dscl(*args)
  host = "."
  stdout_result = ""; stderr_result = ""; cmd = "dscl #{host} -#{args.join(' ')}"
  status = popen4(cmd) do |pid, stdin, stdout, stderr|
    stdout.each { |line| stdout_result << line }
    stderr.each { |line| stderr_result << line }
  end
  return [cmd, status, stdout_result, stderr_result]
end

#dscl_create_group ⇒ Object 



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# File 'lib/chef/provider/group/dscl.rb', line 140

def dscl_create_group
  safe_dscl("create /Groups/#{@new_resource.group_name}")
  safe_dscl("create /Groups/#{@new_resource.group_name} Password '*'")
end

#get_free_gid(search_limit = 1000) ⇒ Object

get a free GID greater than 200



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# File 'lib/chef/provider/group/dscl.rb', line 49

def get_free_gid(search_limit=1000)
  gid = nil; next_gid_guess = 200
  groups_gids = safe_dscl("list /Groups gid")
  while(next_gid_guess < search_limit + 200)
    if groups_gids =~ Regexp.new("#{Regexp.escape(next_gid_guess.to_s)}\n")
      next_gid_guess += 1
    else
      gid = next_gid_guess
      break
    end
  end
  return gid || raise("gid not found. Exhausted. Searched #{search_limit} times")
end

#gid_used?(gid) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/group/dscl.rb', line 63

def gid_used?(gid)
  return false unless gid
  groups_gids = safe_dscl("list /Groups gid")
  !! ( groups_gids =~ Regexp.new("#{Regexp.escape(gid.to_s)}\n") )
end

#load_current_resource ⇒ Object 



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# File 'lib/chef/provider/group/dscl.rb', line 118

def load_current_resource
  super
end

#manage_group ⇒ Object 



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# File 'lib/chef/provider/group/dscl.rb', line 128

def manage_group
  if @new_resource.group_name && (@current_resource.group_name != @new_resource.group_name)
    dscl_create_group
  end
  if @new_resource.gid && (@current_resource.gid != @new_resource.gid)
    set_gid
  end
  if @new_resource.members || @new_resource.excluded_members
    set_members
  end
end

#remove_group ⇒ Object 



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# File 'lib/chef/provider/group/dscl.rb', line 145

def remove_group
  safe_dscl("delete /Groups/#{@new_resource.group_name}")
end

#safe_dscl(*args) ⇒ Object

Raises:



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# File 'lib/chef/provider/group/dscl.rb', line 34

def safe_dscl(*args)
  result = dscl(*args)
  return "" if ( args.first =~ /^delete/ ) && ( result[1].exitstatus != 0 )
  raise(Chef::Exceptions::Group,"dscl error: #{result.inspect}") unless result[1].exitstatus == 0
  raise(Chef::Exceptions::Group,"dscl error: #{result.inspect}") if result[2] =~ /No such key: /
  return result[2]
end

#set_gid ⇒ Object

Raises:



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# File 'lib/chef/provider/group/dscl.rb', line 69

def set_gid
  @new_resource.gid(get_free_gid) if [nil,""].include? @new_resource.gid
  raise(Chef::Exceptions::Group,"gid is already in use") if gid_used?(@new_resource.gid)
  safe_dscl("create /Groups/#{@new_resource.group_name} PrimaryGroupID #{@new_resource.gid}")
end

#set_members ⇒ Object 



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# File 'lib/chef/provider/group/dscl.rb', line 75

def set_members
  # First reset the memberships if the append is not set
  unless @new_resource.append
    Chef::Log.debug("#{@new_resource} removing group members #{@current_resource.members.join(' ')}") unless @current_resource.members.empty?
    safe_dscl("create /Groups/#{@new_resource.group_name} GroupMembers ''") # clear guid list
    safe_dscl("create /Groups/#{@new_resource.group_name} GroupMembership ''") # clear user list
    @current_resource.members([ ])
  end

  # Add any members that need to be added
  if @new_resource.members && !@new_resource.members.empty?
    members_to_be_added = [ ]
    @new_resource.members.each do |member|
      members_to_be_added << member if !@current_resource.members.include?(member)
    end
    unless members_to_be_added.empty?
      Chef::Log.debug("#{@new_resource} setting group members #{members_to_be_added.join(', ')}")
      safe_dscl("append /Groups/#{@new_resource.group_name} GroupMembership #{members_to_be_added.join(' ')}")
    end
  end

  # Remove any members that need to be removed
  if @new_resource.excluded_members && !@new_resource.excluded_members.empty?
    members_to_be_removed = [ ]
    @new_resource.excluded_members.each do |member|
      members_to_be_removed << member if @current_resource.members.include?(member)
    end
    unless members_to_be_removed.empty?
      Chef::Log.debug("#{@new_resource} removing group members #{members_to_be_removed.join(', ')}")
      safe_dscl("delete /Groups/#{@new_resource.group_name} GroupMembership #{members_to_be_removed.join(' ')}")
    end
  end
end