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#
# Author:: John Keiser (<jkeiser@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_relative "api/error"
require_relative "memory"
require_relative "unicode"
require_relative "../exceptions"
class Chef
module ReservedNames::Win32
class Error
include Chef::ReservedNames::Win32::API::Error
extend Chef::ReservedNames::Win32::API::Error
def self.format_message(message_id = 0, args = {})
flags = args[:flags] || FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ARGUMENT_ARRAY
flags |= FORMAT_MESSAGE_ALLOCATE_BUFFER
source = args[:source] || 0
language_id = args[:language_id] || 0
varargs = args[:varargs] || [:int, 0]
buffer = FFI::MemoryPointer.new :pointer
num_chars = FormatMessageW(flags, source, message_id, language_id, buffer, 0, *varargs)
if num_chars == 0
source = LoadLibraryExW("netmsg.dll".to_wstring, 0, LOAD_LIBRARY_AS_DATAFILE)
begin
num_chars = FormatMessageW(flags | FORMAT_MESSAGE_FROM_HMODULE, source, message_id, language_id, buffer, 0, *varargs)
ensure
FreeLibrary(source)
end
end
if num_chars == 0
raise!
end
# Extract the string
begin
buffer.read_pointer.read_wstring(num_chars)
ensure
Chef::ReservedNames::Win32::Memory.local_free(buffer.read_pointer)
end
end
def self.get_last_error
FFI::LastError.error
end
# Raises the last error. This should only be called by
# Win32 API wrapper functions, and then only when wrapped
# in an if() statement (since it unconditionally exits)
# === Returns
# nil::: always returns nil when it does not raise
# === Raises
# Chef::Exceptions::Win32APIError:::
def self.raise!(message = nil, code = get_last_error)
msg = format_message(code).strip
if code == ERROR_USER_NOT_FOUND
raise Chef::Exceptions::UserIDNotFound, msg
else
formatted_message = ""
formatted_message << message if message
formatted_message << "---- Begin Win32 API output ----\n"
formatted_message << "System Error Code: #{code}\n"
formatted_message << "System Error Message: #{msg}\n"
formatted_message << "---- End Win32 API output ----\n"
raise Chef::Exceptions::Win32APIError, msg + "\n" + formatted_message
end
end
end
end
end
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