twrpinstall: create library for twrpinstall
This library will need to mirror AOSP for any changes to installing
packages. The library has been separated out in order to make importing
updates from AOSP into the TWRP project.
twinstall.cpp has been removed from the recovery binary and added to
this library. It has been refactored for libziparchive.
Sideload has been reworked to use the newer methods from AOSP on
flashing packages through adb sideload.
We are also removing old libraries for adb and verifier.
Lastly before flashing a zip or image, we want to unlock block devices
for writing so that when an OTA is flashed to the inactive slot,
the flash will succeed.
Change-Id: I6d8702fc9031ffaf9f666b4ba375dc7d9362e473
diff --git a/twrpinstall/ZipUtil.cpp b/twrpinstall/ZipUtil.cpp
new file mode 100755
index 0000000..f8134bc
--- /dev/null
+++ b/twrpinstall/ZipUtil.cpp
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include "ZipUtil.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <utime.h>
+
+#include <string>
+
+#include <android-base/logging.h>
+#include <android-base/unique_fd.h>
+#include <selinux/label.h>
+#include <selinux/selinux.h>
+#include <ziparchive/zip_archive.h>
+
+#include "otautil/dirutil.h"
+
+static constexpr mode_t UNZIP_DIRMODE = 0755;
+static constexpr mode_t UNZIP_FILEMODE = 0644;
+
+bool ExtractPackageRecursive(ZipArchiveHandle zip, const std::string& zip_path,
+ const std::string& dest_path, const struct utimbuf* timestamp,
+ struct selabel_handle* sehnd) {
+ if (!zip_path.empty() && zip_path[0] == '/') {
+ LOG(ERROR) << "ExtractPackageRecursive(): zip_path must be a relative path " << zip_path;
+ return false;
+ }
+ if (dest_path.empty() || dest_path[0] != '/') {
+ LOG(ERROR) << "ExtractPackageRecursive(): dest_path must be an absolute path " << dest_path;
+ return false;
+ }
+
+ void* cookie;
+ std::string target_dir(dest_path);
+ if (dest_path.back() != '/') {
+ target_dir += '/';
+ }
+ std::string prefix_path(zip_path);
+ if (!zip_path.empty() && zip_path.back() != '/') {
+ prefix_path += '/';
+ }
+ const ZipString zip_prefix(prefix_path.c_str());
+
+ int ret = StartIteration(zip, &cookie, &zip_prefix, nullptr);
+ if (ret != 0) {
+ LOG(ERROR) << "failed to start iterating zip entries.";
+ return false;
+ }
+
+ std::unique_ptr<void, decltype(&EndIteration)> guard(cookie, EndIteration);
+ ZipEntry entry;
+ ZipString name;
+ int extractCount = 0;
+ while (Next(cookie, &entry, &name) == 0) {
+ std::string entry_name(name.name, name.name + name.name_length);
+ CHECK_LE(prefix_path.size(), entry_name.size());
+ std::string path = target_dir + entry_name.substr(prefix_path.size());
+ // Skip dir.
+ if (path.back() == '/') {
+ continue;
+ }
+ //TODO(b/31917448) handle the symlink.
+
+ if (dirCreateHierarchy(path.c_str(), UNZIP_DIRMODE, timestamp, true, sehnd) != 0) {
+ LOG(ERROR) << "failed to create dir for " << path;
+ return false;
+ }
+
+ char *secontext = NULL;
+ if (sehnd) {
+ selabel_lookup(sehnd, &secontext, path.c_str(), UNZIP_FILEMODE);
+ setfscreatecon(secontext);
+ }
+ android::base::unique_fd fd(open(path.c_str(), O_CREAT|O_WRONLY|O_TRUNC, UNZIP_FILEMODE));
+ if (fd == -1) {
+ PLOG(ERROR) << "Can't create target file \"" << path << "\"";
+ return false;
+ }
+ if (secontext) {
+ freecon(secontext);
+ setfscreatecon(NULL);
+ }
+
+ int err = ExtractEntryToFile(zip, &entry, fd);
+ if (err != 0) {
+ LOG(ERROR) << "Error extracting \"" << path << "\" : " << ErrorCodeString(err);
+ return false;
+ }
+
+ if (fsync(fd) != 0) {
+ PLOG(ERROR) << "Error syncing file descriptor when extracting \"" << path << "\"";
+ return false;
+ }
+
+ if (timestamp != nullptr && utime(path.c_str(), timestamp)) {
+ PLOG(ERROR) << "Error touching \"" << path << "\"";
+ return false;
+ }
+
+ LOG(INFO) << "Extracted file \"" << path << "\"";
+ ++extractCount;
+ }
+
+ LOG(INFO) << "Extracted " << extractCount << " file(s)";
+ return true;
+}