# File lib/puppet/util/posix.rb, line 115
115:     def uid(user)
116:         begin
117:             user = Integer(user)
118:         rescue ArgumentError
119:             # pass
120:         end
121:         if user.is_a?(Integer)
122:             return nil unless name = get_posix_field(:passwd, :name, user)
123:             uid = get_posix_field(:passwd, :uid, name)
124:             check_value = uid
125:         else
126:             return nil unless uid = get_posix_field(:passwd, :uid, user)
127:             name = get_posix_field(:passwd, :name, uid)
128:             check_value = name
129:         end
130:         if check_value != user
131:             return search_posix_field(:passwd, :uid, user)
132:         else
133:             return uid
134:         end
135:     end