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#
# Author:: Dreamcat4 (<dreamcat4@gmail.com>)
# Copyright:: Copyright (c) 2009 OpsCode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
class Chef
class Provider
class Group
class Dscl < Chef::Provider::Group
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
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
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
Chef::Log.debug("#{@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
# get a free GID greater than 200
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
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
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
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
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
def create_group
dscl_create_group
set_gid
set_members
end
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
def dscl_create_group
safe_dscl("create /Groups/#{@new_resource.group_name}")
safe_dscl("create /Groups/#{@new_resource.group_name} Password '*'")
end
def remove_group
safe_dscl("delete /Groups/#{@new_resource.group_name}")
end
end
end
end
end
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