summaryrefslogtreecommitdiff
path: root/lib/puppet/provider/sudoers/parsed.rb
blob: 85e9fe19782bf6d68724aac0c11d03d424aaff0a (plain)
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
217
218
219
220
221
require 'puppet/provider/parsedfile'
sudoers = "/etc/sudoers"

#
# crontab does the same thing, it uses a comment to specify uniqueness
#
 
Puppet::Type.type(:sudoers).provide(
  :parsed, 
  :parent => Puppet::Provider::ParsedFile, 
  :default_target => '/etc/sudoers', 
  :filetype => :flat
) do
 
  desc "The sudoers provider that uses the ParsedFile class"

  commands :visudo => 'visudo'

  # this is just copied from hosts
  text_line :comment, :match => %r{^#}, 
    :post_parse => proc { |record|
    # shameful NAMEVAR hack :(
      if record[:line] =~ /Puppet NAMEVAR (.+)\s*$/
        record[:name] = $1
      end
    } 

  text_line :blank, :match => /^\s*$/;

  #
  # parse lines as either a Defaults, Alias, or User spec.
  #
  # match everything and process entire line
  record_line :parsed, :fields => %w{line},
    :match => /(.*)/,
    :post_parse => proc { |hash|
      Puppet.debug("sudoers post_parse for line #{hash[:line]}")
      # create records for aliases
      if (hash[:line] =~ /^\s*((User|Runas|Host|Cmnd)_Alias)\s+(\S+)\s*=\s*(.+)$/)
        Puppet.debug("parsed line as Alias")
        Puppet::Type.type(:sudoers).provider(:parsed).parse_alias($1, $3, $4, hash)
      elsif (hash[:line] =~ /^\s*(Defaults\S*)\s*(.*)$/)
        Puppet.debug("parsed line as Defaults")
        Puppet::Type.type(:sudoers).provider(:parsed).parse_defaults($1, $2, hash)
      elsif (hash[:line] =~ /^\s*(.*)?=(.*)$/)
        Puppet.debug("parsed line as User Spec")
        Puppet::Type.type(:sudoers).provider(:parsed).parse_user_spec($1, $2, hash)
      else 
        raise Puppet::Error, "invalid line #{hash[:line]}"
      end
#      puts hash.to_yaml
#      hash
    }

  # parse alias lines
  def self.parse_alias(sudo_alias, name, items, hash)
    hash[:type] = 'alias'
    hash[:sudo_alias] = sudo_alias
    hash[:name] = name
    hash[:items] = clean_list(items) 
    hash 
  end

  # parse existing user spec lines from sudoers
  def self.parse_user_spec(users_hosts, commands, hash) 
    hash[:type] = 'user_spec'
    #hash[:name] = user
    #hash[:hosts] = hosts.gsub(/\s/, '').split(',')
    hash[:commands] = clean_list(commands)
    hash_array = users_hosts.split(',')  
    # every element will be a user until the hit the delim
    currentsymbol = :users
    hash[:users] = Array.new
    hash[:hosts] = Array.new
    # parsing users and hosts is kind of complicated, sorry
    hash_array.each do |element|
#puts "!! #{element}"
    # the element that splits users and hosts will be 2 white space delimited strings 
      if element =~ /^\s*(\S+)\s+(\S+)\s*$/
        user, host  = $1, $2
        if currentsymbol == :hosts
          raise Exception, 'found more than one whitespace delim in users_hosts' 
        end
        # sweet we found the delim between user and host
        hash[currentsymbol] << user.gsub(/\s/, '')
        # now everything else will be a host
        currentsymbol=:hosts
        hash[currentsymbol] << host.gsub(/\s/, '')
      elsif element =~ /\s*\S+\s*/
        hash[currentsymbol] << element.gsub(/\s/, '')
      else
        raise Exception, "Malformed user spec line lhs: #{lhs}"
      end
    end
  end 

  # create record for defaults line
  def self.parse_defaults(default, parameters, hash)
    hash[:name] = default
    hash[:type] = 'default'
    hash[:parameters] = parameters.gsub(/\s/, '').split(',')
  end
  
  # can I override this?
  def type=(value)
    raise Puppet::Error, 'not supporting switching NAMEVAR between record types'
  end
  
  # I could use prefetch_hook to support multi-line entries
  # will use the prefetch_hook to determine if
  # the line before us is a commented namevar line
  # only used for user spec.
  # Most of this code is shameless taken from provider crontab.rb
  # NAMEVAR comments leave me in need of a shower, but it seems to be the only way.
  def self.prefetch_hook(records)
    # store comment name vars when we find them
    name=nil
    results = records.each do |record|
      if(record[:record_type] == :comment)
        # if we are a namevar comment
#puts "found a comment: #{record.to_yaml}"
        if record[:name]
#puts "found a comment with :name"
          name = record[:name]
          record[:skip] = true
        end
       # if we are a spec record, check the namevar
      elsif record[:type] == 'user_spec'
        if name
#puts "adding to a record"
          record[:name] = name
          name = nil
        else
          puts "spec record not created by puppet"
          # probably a pre-exting record not created by puppet
        end 
      end
    end.reject{|record| record[:skip]}
    results
  end

 # overriding how lines are written to the file
  def self.to_line(hash) 
    #puts "\nEntering self.to_line for #{hash[:name]}"
    #puts "\n#{hash.to_yaml}\n"
#    # dynamically call a function based on the value of hash[:type]
    if(hash[:record_type] == :blank || hash[:record_type] == :comment)
      hash[:line]
    elsif(hash[:type] == 'alias')
      self.alias_to_line(hash) 
    elsif(hash[:type] == 'user_spec')
      self.spec_to_line(hash)
    elsif(hash[:type] == 'default')
      self.default_to_line(hash)
    else
      raise Puppet::Error, "dont understand how to write out record \n|#{hash.to_yaml}\n|"
    end
  end

  # write line for user spec records
  def self.spec_to_line(hash)
#puts hash.to_yaml
    #required
    #users=self.array_convert(hash[:users])
    # required
    hosts=self.array_convert(hash[:hosts])
    users=self.array_convert(hash[:users])
    # required
    commands=self.array_convert(hash[:commands])
    str = "#Puppet NAMEVAR #{hash[:name]}"
    str << "\n#{users} #{hosts}=#{commands}"
    Puppet.notice "adding line:  #{str}"
    str
  end

  # write line for alias records
  def self.alias_to_line(hash) 
    # do I need to ensure that the required elements are here?
    # shouldnt the type do that? check file, its similar
    # since different attributes make sense based on ensure value (dir/file/symlink)
    items=self.array_convert(hash[:items])
    str = "#{hash[:sudo_alias]} #{hash[:name]}=#{items}"
    Puppet.notice "adding line: #{str}"
    str
  end

  # write line for default records
  # this is not implemented yet.
  def self.default_to_line(hash)
    parameters=self.array_convert(hash[:parameters])
    str = "#{hash[:name]} #{parameters}"
    Puppet.notice "Adding line #{str}"
    str
  end

  # convert arrays into to , joined lists
  def self.array_convert(list)
    if list.class == Array
      list.join(',')
    else
      list
    end
  end

  # split a list on delim,  trim leading and trailing white-spaces
  def self.clean_list(list, delim=',')
    list.split(delim).collect do |x| 
      x.gsub(/\s*(.*)?\s*/, '\1')
    end
  end

  # used to verify files with visudo before they are flushed 
  # flush seems to be called more than one time?
  def self.flush_target(target)
    Puppet.info("We are flushing #{target}")
    #  a little pre-flush hot visudo action
    #puts File.read(target)
    visudo("-cf", target) unless (File.zero?(target) or !File.exists?(target))
    super(target)
  end
end