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, #after_resource, #current_resource, #logger, #new_resource, #recipe_name, #run_context

Instance Method Summary collapse

Methods inherited from Chef::Provider::Group

#compare_group, #group_gid_match?, #group_members_match?, #has_current_group_member?, #initialize, #validate_member!

Methods inherited from Chef::Provider

action, #action_nothing, #check_resource_semantics!, #cleanup_after_converge, #compile_and_converge_action, #converge_by, #converge_if_changed, #cookbook_name, #description, #events, include_resource_dsl?, include_resource_dsl_module, #initialize, #introduced, #load_after_resource, #node, #process_resource_requirements, provides, provides?, #requirements, #resource_collection, #resource_updated?, #run_action, #set_updated_status, supports?, use, use_inline_resources, #validate_required_properties!, #whyrun_mode?, #whyrun_supported?

Methods included from Mixin::LazyModuleInclude

#descendants, #include, #included

Methods included from Mixin::PowershellOut

#powershell_out, #powershell_out!

Methods included from Mixin::WindowsArchitectureHelper

#assert_valid_windows_architecture!, #disable_wow64_file_redirection, #forced_32bit_override_required?, #is_i386_process_on_x86_64_windows?, #node_supports_windows_architecture?, #node_windows_architecture, #restore_wow64_file_redirection, #valid_windows_architecture?, #with_os_architecture, #wow64_architecture_override_required?, #wow64_directory

Methods included from Mixin::PowershellExec

#powershell_exec, #powershell_exec!

Methods included from DSL::Powershell

#ps_credential

Methods included from DSL::RegistryHelper

#registry_data_exists?, #registry_get_subkeys, #registry_get_values, #registry_has_subkeys?, #registry_key_exists?, #registry_value_exists?

Methods included from DSL::ChefVault

#chef_vault, #chef_vault_item, #chef_vault_item_for_environment

Methods included from DSL::DataQuery

#data_bag, #data_bag_item, #search, #tagged?

Methods included from EncryptedDataBagItem::CheckEncrypted

#encrypted?

Methods included from DSL::PlatformIntrospection

#older_than_win_2012_or_8?, #platform?, #platform_family?, #value_for_platform, #value_for_platform_family

Methods included from Mixin::Provides

#provided_as, #provides, #provides?

Methods included from Mixin::DescendantsTracker

#descendants, descendants, #direct_descendants, direct_descendants, #find_descendants_by_name, find_descendants_by_name, #inherited, store_inherited

Methods included from DSL::Recipe

#exec, #have_resource_class_for?, #resource_class_for

Methods included from DSL::Definitions

add_definition, #evaluate_resource_definition, #has_resource_definition?

Methods included from DSL::Resources

add_resource_dsl, remove_resource_dsl

Methods included from DSL::Cheffish

load_cheffish

Methods included from DSL::RebootPending

#reboot_pending?

Methods included from DSL::IncludeRecipe

#include_recipe, #load_recipe

Methods included from Mixin::NotifyingBlock

#notifying_block, #subcontext_block

Methods included from DSL::DeclareResource

#build_resource, #declare_resource, #delete_resource, #delete_resource!, #edit_resource, #edit_resource!, #find_resource, #find_resource!, #resources, #with_run_context

Constructor Details

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

Instance Method Details

#create_groupObject


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# File 'lib/chef/provider/group/dscl.rb', line 151

def create_group
  dscl_create_group
  set_gid
  set_members
end

#define_resource_requirementsObject


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# File 'lib/chef/provider/group/dscl.rb', line 142

def define_resource_requirements
  super
  requirements.assert(:all_actions) do |a|
    a.assertion { ::File.exist?("/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 26

def dscl(*args)
  argdup = args.dup
  cmd = argdup.shift
  shellcmd = [ "dscl", ".", "-#{cmd}", argdup ]
  status = shell_out(shellcmd)
  stdout_result = ""
  stderr_result = ""
  status.stdout.each_line { |line| stdout_result << line }
  status.stderr.each_line { |line| stderr_result << line }
  [shellcmd.flatten.compact.join(" "), status, stdout_result, stderr_result]
end

#dscl_create_groupObject


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# File 'lib/chef/provider/group/dscl.rb', line 169

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 76

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&.match?(Regexp.new("#{Regexp.escape(next_gid_guess.to_s)}\n"))
      next_gid_guess += 1
    else
      gid = next_gid_guess
      break
    end
  end
  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 90

def gid_used?(gid)
  return false unless gid

  search_gids = safe_dscl("search", "/Groups", "PrimaryGroupID", gid.to_s)

  # dscl -search should not return anything if the gid doesn't exist,
  # but on the off-chance that it does, check whether the given gid is
  # in the output.
  !!(search_gids =~ /\b#{gid}\b/)
end

#load_current_resourceObject


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# File 'lib/chef/provider/group/dscl.rb', line 47

def load_current_resource
  @current_resource = Chef::Resource::Group.new(new_resource.name)
  current_resource.group_name(new_resource.group_name)
  group_info = nil
  begin
    group_info = safe_dscl("read", "/Groups/#{new_resource.group_name}")
  rescue Chef::Exceptions::Group
    @group_exists = false
    logger.trace("#{new_resource} group does not exist")
  end

  if group_info
    group_info.each_line do |line|
      key, val = line.split(": ")
      val.strip! if val
      case key.downcase
      when "primarygroupid"
        new_resource.gid(val) unless new_resource.gid
        current_resource.gid(val)
      when "groupmembership"
        current_resource.members(val.split(" "))
      end
    end
  end

  current_resource
end

#manage_groupObject


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# File 'lib/chef/provider/group/dscl.rb', line 157

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_groupObject


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# File 'lib/chef/provider/group/dscl.rb', line 174

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

#safe_dscl(*args) ⇒ Object


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# File 'lib/chef/provider/group/dscl.rb', line 38

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 /No such key: /.match?(result[2])

  result[2]
end

#set_gidObject


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# File 'lib/chef/provider/group/dscl.rb', line 101

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_membersObject


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# File 'lib/chef/provider/group/dscl.rb', line 108

def set_members
  # First reset the memberships if the append is not set
  unless new_resource.append
    logger.trace("#{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 unless current_resource.members.include?(member)
    end
    unless members_to_be_added.empty?
      logger.trace("#{new_resource} setting group members #{members_to_be_added.join(", ")}")
      safe_dscl("append", "/Groups/#{new_resource.group_name}", "GroupMembership", *members_to_be_added)
    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?
      logger.trace("#{new_resource} removing group members #{members_to_be_removed.join(", ")}")
      safe_dscl("delete", "/Groups/#{new_resource.group_name}", "GroupMembership", *members_to_be_removed)
    end
  end
end