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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// This file declares util functions for setup project.
#include "chrome/installer/setup/setup_util.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/string_util.h"
#include "chrome/installer/util/installer_state.h"
#include "chrome/installer/util/util_constants.h"
#include "courgette/courgette.h"
#include "third_party/bspatch/mbspatch.h"
namespace installer {
int ApplyDiffPatch(const FilePath& src,
const FilePath& patch,
const FilePath& dest,
const InstallerState* installer_state) {
VLOG(1) << "Applying patch " << patch.value() << " to file " << src.value()
<< " and generating file " << dest.value();
if (installer_state != NULL)
installer_state->UpdateStage(installer::ENSEMBLE_PATCHING);
// Try Courgette first. Courgette checks the patch file first and fails
// quickly if the patch file does not have a valid Courgette header.
courgette::Status patch_status =
courgette::ApplyEnsemblePatch(src.value().c_str(),
patch.value().c_str(),
dest.value().c_str());
if (patch_status == courgette::C_OK)
return 0;
VLOG(1) << "Failed to apply patch " << patch.value() << " using courgette.";
if (installer_state != NULL)
installer_state->UpdateStage(installer::BINARY_PATCHING);
return ApplyBinaryPatch(src.value().c_str(), patch.value().c_str(),
dest.value().c_str());
}
Version* GetMaxVersionFromArchiveDir(const FilePath& chrome_path) {
VLOG(1) << "Looking for Chrome version folder under " << chrome_path.value();
Version* version = NULL;
file_util::FileEnumerator version_enum(chrome_path, false,
file_util::FileEnumerator::DIRECTORIES);
// TODO(tommi): The version directory really should match the version of
// setup.exe. To begin with, we should at least DCHECK that that's true.
scoped_ptr<Version> max_version(Version::GetVersionFromString("0.0.0.0"));
bool version_found = false;
while (!version_enum.Next().empty()) {
file_util::FileEnumerator::FindInfo find_data = {0};
version_enum.GetFindInfo(&find_data);
VLOG(1) << "directory found: " << find_data.cFileName;
scoped_ptr<Version> found_version(
Version::GetVersionFromString(WideToASCII(find_data.cFileName)));
if (found_version.get() != NULL &&
found_version->CompareTo(*max_version.get()) > 0) {
max_version.reset(found_version.release());
version_found = true;
}
}
return (version_found ? max_version.release() : NULL);
}
// Open |path| with minimal access to obtain information about it, returning
// true and populating |handle| on success.
// static
bool ProgramCompare::OpenForInfo(const FilePath& path,
base::win::ScopedHandle* handle) {
DCHECK(handle);
handle->Set(base::CreatePlatformFile(path, base::PLATFORM_FILE_OPEN, NULL,
NULL));
return handle->IsValid();
}
// Populate |info| for |handle|, returning true on success.
// static
bool ProgramCompare::GetInfo(const base::win::ScopedHandle& handle,
BY_HANDLE_FILE_INFORMATION* info) {
DCHECK(handle.IsValid());
return GetFileInformationByHandle(
const_cast<base::win::ScopedHandle&>(handle), info) != 0;
}
ProgramCompare::ProgramCompare(const FilePath& path_to_match)
: path_to_match_(path_to_match),
file_handle_(base::kInvalidPlatformFileValue),
file_info_() {
DCHECK(!path_to_match_.empty());
if (!OpenForInfo(path_to_match_, &file_handle_)) {
PLOG(WARNING) << "Failed opening " << path_to_match_.value()
<< "; falling back to path string comparisons.";
} else if (!GetInfo(file_handle_, &file_info_)) {
PLOG(WARNING) << "Failed getting information for "
<< path_to_match_.value()
<< "; falling back to path string comparisons.";
file_handle_.Close();
}
}
ProgramCompare::~ProgramCompare() {
}
bool ProgramCompare::Evaluate(const std::wstring& value) const {
// Suss out the exe portion of the value, which is expected to be a command
// line kinda (or exactly) like:
// "c:\foo\bar\chrome.exe" -- "%1"
FilePath program(CommandLine::FromString(value).GetProgram());
if (program.empty()) {
LOG(WARNING) << "Failed to parse an executable name from command line: \""
<< value << "\"";
return false;
}
// Try the simple thing first: do the paths happen to match?
if (FilePath::CompareEqualIgnoreCase(path_to_match_.value(), program.value()))
return true;
// If the paths don't match and we couldn't open the expected file, we've done
// our best.
if (!file_handle_.IsValid())
return false;
// Open the program and see if it references the expected file.
base::win::ScopedHandle handle;
BY_HANDLE_FILE_INFORMATION info = {};
return (OpenForInfo(program, &handle) &&
GetInfo(handle, &info) &&
info.dwVolumeSerialNumber == file_info_.dwVolumeSerialNumber &&
info.nFileIndexHigh == file_info_.nFileIndexHigh &&
info.nFileIndexLow == file_info_.nFileIndexLow);
}
} // namespace installer
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