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#
# Author:: Adam Jacob (<adam@chef.io>)
# Copyright:: Copyright (c) Chef Software 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.
#
require "tempfile" unless defined?(Tempfile)
require_relative "execute"
require_relative "../win32/security" if ChefUtils.windows?
require "forwardable" unless defined?(Forwardable)
class Chef
class Provider
class Script < Chef::Provider::Execute
extend Forwardable
provides :bash
provides :csh
provides :ksh
provides :perl
provides :python
provides :ruby
provides :script
def_delegators :new_resource, :interpreter, :flags
attr_accessor :code
def initialize(new_resource, run_context)
super
self.code = new_resource.code
end
def command
"\"#{interpreter}\" #{flags} \"#{script_file.path}\""
end
action :run do
script_file.puts(code)
script_file.close
set_owner_and_group
super()
unlink_script_file
end
def set_owner_and_group
if ChefUtils.windows?
# And on Windows also this is a no-op if there is no user specified.
grant_alternate_user_read_access
else
# FileUtils itself implements a no-op if +user+ or +group+ are nil
# You can prove this by running FileUtils.chown(nil,nil,'/tmp/file')
# as an unprivileged user.
FileUtils.chown(new_resource.user, new_resource.group, script_file.path)
end
end
def grant_alternate_user_read_access
# Do nothing if an alternate user isn't specified -- the file
# will already have the correct permissions for the user as part
# of the default ACL behavior on Windows.
return if new_resource.user.nil?
# Duplicate the script file's existing DACL
# so we can add an ACE later
securable_object = Chef::ReservedNames::Win32::Security::SecurableObject.new(script_file.path)
aces = securable_object.security_descriptor.dacl.reduce([]) { |result, current| result.push(current) }
username = new_resource.user
if new_resource.domain
username = new_resource.domain + '\\' + new_resource.user
end
# Create an ACE that allows the alternate user read access to the script
# file so it can be read and executed.
user_sid = Chef::ReservedNames::Win32::Security::SID.from_account(username)
read_ace = Chef::ReservedNames::Win32::Security::ACE.access_allowed(user_sid, Chef::ReservedNames::Win32::API::Security::GENERIC_READ | Chef::ReservedNames::Win32::API::Security::GENERIC_EXECUTE, 0)
aces.push(read_ace)
acl = Chef::ReservedNames::Win32::Security::ACL.create(aces)
# This actually applies the modified DACL to the file
# Use parentheses to bypass RuboCop / ChefStyle warning
# about useless setter
(securable_object.dacl = acl)
end
def script_file
@script_file ||= Tempfile.open("chef-script")
end
def unlink_script_file
script_file && script_file.close!
end
end
end
end
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