1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
#
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Daniel DeLeo (<dan@opscode.com>)
# Author:: Seth Chisamore (<schisamo@opscode.com>)
# Copyright:: Copyright (c) 2008-2011 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.
#
require 'chef/log'
class Chef
class FileAccessControl
module Unix
UINT = (1 << 32)
UID_MAX = (1 << 32) - 10
def set_all!
set_owner!
set_group!
set_mode!
end
def set_all
set_owner
set_group
set_mode
end
# TODO factor this up
def requires_changes?
should_update_mode? || should_update_owner? || should_update_group?
end
def describe_changes
changes = []
changes << "change mode from '#{mode_to_s(current_mode)}' to '#{mode_to_s(target_mode)}'" if should_update_mode?
changes << "change owner from '#{current_resource.owner}' to '#{resource.owner}'" if should_update_owner?
changes << "change group from '#{current_resource.group}' to '#{resource.group}'" if should_update_group?
changes
end
def target_uid
uid_from_resource(resource)
end
def current_uid
uid_from_resource(current_resource)
end
def should_update_owner?
!target_uid.nil? && target_uid != current_uid
end
def set_owner!
unless target_uid.nil?
chown(target_uid, nil, file)
Chef::Log.info("#{log_string} owner changed to #{target_uid}")
modified
end
end
def set_owner
set_owner! if should_update_owner?
end
def target_gid
gid_from_resource(resource)
end
def current_gid
gid_from_resource(current_resource)
end
def gid_from_resource(resource)
return nil if resource == nil or resource.group.nil?
if resource.group.kind_of?(String)
diminished_radix_complement( Etc.getgrnam(resource.group).gid )
elsif resource.group.kind_of?(Integer)
resource.group
else
Chef::Log.error("The `group` parameter of the #@resource resource is set to an invalid value (#{resource.owner.inspect})")
raise ArgumentError, "cannot resolve #{resource.group.inspect} to gid, group must be a string or integer"
end
rescue ArgumentError
provider.requirements.assert(:create, :create_if_missing, :touch) do |a|
a.assertion { false }
a.failure_message(Chef::Exceptions::GroupIDNotFound, "cannot determine group id for '#{resource.group}', does the group exist on this system?")
a.whyrun("Assuming group #{resource.group} would have been created")
end
return nil
end
def should_update_group?
!target_gid.nil? && target_gid != current_gid
end
def set_group!
unless target_gid.nil?
chown(nil, target_gid, file)
Chef::Log.info("#{log_string} group changed to #{target_gid}")
modified
end
end
def set_group
set_group! if should_update_group?
end
def mode_from_resource(res)
return nil if res == nil or res.mode.nil?
(res.mode.respond_to?(:oct) ? res.mode.oct : res.mode.to_i) & 007777
end
def target_mode
mode_from_resource(resource)
end
def mode_to_s(mode)
mode.nil? ? "" : "0#{mode.to_s(8)}"
end
def current_mode
mode_from_resource(current_resource)
end
def should_update_mode?
!target_mode.nil? && current_mode != target_mode
end
def set_mode!
unless target_mode.nil?
chmod(target_mode, file)
Chef::Log.info("#{log_string} mode changed to #{target_mode.to_s(8)}")
modified
end
end
def set_mode
set_mode! if should_update_mode?
end
def stat
if File.symlink?(file)
@stat ||= File.lstat(file)
else
@stat ||= File.stat(file)
end
end
private
def chmod(mode, file)
if File.symlink?(file)
begin
File.lchmod(mode, file)
rescue NotImplementedError
Chef::Log.warn("#{file} mode not changed: File.lchmod is unimplemented on this OS and Ruby version")
end
else
File.chmod(mode, file)
end
end
def chown(uid, gid, file)
if ::File.symlink?(file)
File.lchown(uid, gid, file)
else
File.chown(uid, gid, file)
end
end
# Workaround the fact that Ruby's Etc module doesn't believe in negative
# uids, so negative uids show up as the diminished radix complement of
# a uint. For example, a uid of -2 is reported as 4294967294
def diminished_radix_complement(int)
if int > UID_MAX
int - UINT
else
int
end
end
def uid_from_resource(resource)
return nil if resource == nil or resource.owner.nil?
if resource.owner.kind_of?(String)
diminished_radix_complement( Etc.getpwnam(resource.owner).uid )
elsif resource.owner.kind_of?(Integer)
resource.owner
else
Chef::Log.error("The `owner` parameter of the #@resource resource is set to an invalid value (#{resource.owner.inspect})")
raise ArgumentError, "cannot resolve #{resource.owner.inspect} to uid, owner must be a string or integer"
end
rescue ArgumentError
provider.requirements.assert(:create, :create_if_missing, :touch) do |a|
a.assertion { false }
a.failure_message(Chef::Exceptions::UserIDNotFound, "cannot determine user id for '#{resource.owner}', does the user exist on this system?")
a.whyrun("Assuming user #{resource.owner} would have been created")
end
return nil
end
end
end
end
|
