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author | Tianjie Xu <xunchang@google.com> | 2016-10-19 00:05:21 +0200 |
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committer | android-build-merger <android-build-merger@google.com> | 2016-10-19 00:05:21 +0200 |
commit | 434697f06b7432a2358550eadd74fb97d617035c (patch) | |
tree | c24e3fb0f24bd693e63bfed48e497730164df079 /otautil/ZipUtil.cpp | |
parent | Merge "Change StringValue to use std::string" am: 2b17b24ae5 (diff) | |
parent | resolve merge conflicts of 6fba98c to stage-aosp-master (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | otautil/ZipUtil.cpp | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/otautil/ZipUtil.cpp b/otautil/ZipUtil.cpp new file mode 100644 index 000000000..714c956ed --- /dev/null +++ b/otautil/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 "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; +} |