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// Copyright (c) 2012 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. err=" << patch_status;
// If we ran out of memory or disk space, then these are likely the errors
// we will see. If we run into them, return an error and stay on the
// 'ENSEMBLE_PATCHING' update stage.
if (patch_status == courgette::C_DISASSEMBLY_FAILED ||
patch_status == courgette::C_STREAM_ERROR) {
return MEM_ERROR;
}
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);
}
bool DeleteFileFromTempProcess(const FilePath& path,
uint32 delay_before_delete_ms) {
static const wchar_t kRunDll32Path[] =
L"%SystemRoot%\\System32\\rundll32.exe";
wchar_t rundll32[MAX_PATH];
DWORD size = ExpandEnvironmentStrings(kRunDll32Path, rundll32,
arraysize(rundll32));
if (!size || size >= MAX_PATH)
return false;
STARTUPINFO startup = { sizeof(STARTUPINFO) };
PROCESS_INFORMATION pi = {0};
BOOL ok = ::CreateProcess(NULL, rundll32, NULL, NULL, FALSE, CREATE_SUSPENDED,
NULL, NULL, &startup, &pi);
if (ok) {
// We use the main thread of the new process to run:
// Sleep(delay_before_delete_ms);
// DeleteFile(path);
// ExitProcess(0);
// This runs before the main routine of the process runs, so it doesn't
// matter much which executable we choose except that we don't want to
// use e.g. a console app that causes a window to be created.
size = (path.value().length() + 1) * sizeof(path.value()[0]);
void* mem = ::VirtualAllocEx(pi.hProcess, NULL, size, MEM_COMMIT,
PAGE_READWRITE);
if (mem) {
SIZE_T written = 0;
::WriteProcessMemory(pi.hProcess, mem, path.value().c_str(),
(path.value().size() + 1) * sizeof(path.value()[0]), &written);
HMODULE kernel32 = ::GetModuleHandle(L"kernel32.dll");
PAPCFUNC sleep = reinterpret_cast<PAPCFUNC>(
::GetProcAddress(kernel32, "Sleep"));
PAPCFUNC delete_file = reinterpret_cast<PAPCFUNC>(
::GetProcAddress(kernel32, "DeleteFileW"));
PAPCFUNC exit_process = reinterpret_cast<PAPCFUNC>(
::GetProcAddress(kernel32, "ExitProcess"));
if (!sleep || !delete_file || !exit_process) {
NOTREACHED();
ok = FALSE;
} else {
::QueueUserAPC(sleep, pi.hThread, delay_before_delete_ms);
::QueueUserAPC(delete_file, pi.hThread,
reinterpret_cast<ULONG_PTR>(mem));
::QueueUserAPC(exit_process, pi.hThread, 0);
::ResumeThread(pi.hThread);
}
} else {
PLOG(ERROR) << "VirtualAllocEx";
::TerminateProcess(pi.hProcess, ~0);
}
::CloseHandle(pi.hThread);
::CloseHandle(pi.hProcess);
}
return ok != FALSE;
}
} // namespace installer
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