d58ba18272
This allows flame to boot TWRP. Still will need to work on super partition for vendor and system access. The plan will be to cherry-pick any updates to android-9.0 through gerrit.twrp.me to this branch as a WIP.
122 lines
3.9 KiB
C++
Executable File
122 lines
3.9 KiB
C++
Executable File
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ZipUtil.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <utime.h>
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#include <string>
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#include <android-base/logging.h>
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#include <android-base/unique_fd.h>
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#include <selinux/label.h>
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#include <selinux/selinux.h>
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#include <ziparchive/zip_archive.h>
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#include "otautil/dirutil.h"
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static constexpr mode_t UNZIP_DIRMODE = 0755;
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static constexpr mode_t UNZIP_FILEMODE = 0644;
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bool ExtractPackageRecursive(ZipArchiveHandle zip, const std::string& zip_path,
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const std::string& dest_path, const struct utimbuf* timestamp,
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struct selabel_handle* sehnd) {
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if (!zip_path.empty() && zip_path[0] == '/') {
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LOG(ERROR) << "ExtractPackageRecursive(): zip_path must be a relative path " << zip_path;
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return false;
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}
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if (dest_path.empty() || dest_path[0] != '/') {
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LOG(ERROR) << "ExtractPackageRecursive(): dest_path must be an absolute path " << dest_path;
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return false;
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}
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void* cookie;
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std::string target_dir(dest_path);
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if (dest_path.back() != '/') {
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target_dir += '/';
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}
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std::string prefix_path(zip_path);
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if (!zip_path.empty() && zip_path.back() != '/') {
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prefix_path += '/';
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}
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const ZipString zip_prefix(prefix_path.c_str());
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int ret = StartIteration(zip, &cookie, &zip_prefix, nullptr);
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if (ret != 0) {
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LOG(ERROR) << "failed to start iterating zip entries.";
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return false;
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}
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std::unique_ptr<void, decltype(&EndIteration)> guard(cookie, EndIteration);
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ZipEntry entry;
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ZipString name;
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int extractCount = 0;
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while (Next(cookie, &entry, &name) == 0) {
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std::string entry_name(name.name, name.name + name.name_length);
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CHECK_LE(prefix_path.size(), entry_name.size());
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std::string path = target_dir + entry_name.substr(prefix_path.size());
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// Skip dir.
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if (path.back() == '/') {
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continue;
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}
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//TODO(b/31917448) handle the symlink.
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if (dirCreateHierarchy(path.c_str(), UNZIP_DIRMODE, timestamp, true, sehnd) != 0) {
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LOG(ERROR) << "failed to create dir for " << path;
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return false;
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}
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char *secontext = NULL;
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if (sehnd) {
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selabel_lookup(sehnd, &secontext, path.c_str(), UNZIP_FILEMODE);
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setfscreatecon(secontext);
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}
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android::base::unique_fd fd(open(path.c_str(), O_CREAT|O_WRONLY|O_TRUNC, UNZIP_FILEMODE));
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if (fd == -1) {
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PLOG(ERROR) << "Can't create target file \"" << path << "\"";
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return false;
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}
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if (secontext) {
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freecon(secontext);
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setfscreatecon(NULL);
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}
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int err = ExtractEntryToFile(zip, &entry, fd);
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if (err != 0) {
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LOG(ERROR) << "Error extracting \"" << path << "\" : " << ErrorCodeString(err);
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return false;
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}
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if (fsync(fd) != 0) {
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PLOG(ERROR) << "Error syncing file descriptor when extracting \"" << path << "\"";
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return false;
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}
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if (timestamp != nullptr && utime(path.c_str(), timestamp)) {
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PLOG(ERROR) << "Error touching \"" << path << "\"";
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return false;
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}
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LOG(INFO) << "Extracted file \"" << path << "\"";
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++extractCount;
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}
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LOG(INFO) << "Extracted " << extractCount << " file(s)";
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return true;
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}
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