sandboxed-api/contrib/zstd/example/main.cc

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// Copyright 2022 Google LLC
//
// 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
//
// https://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 <fcntl.h>
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#include <unistd.h>
#include <cstdlib>
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#include <fstream>
#include <iostream>
#include <string>
#include <vector>
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#include "sandboxed_api/util/flag.h"
#include "absl/flags/parse.h"
#include "contrib/zstd/sandboxed.h"
#include "contrib/zstd/utils/utils_zstd.h"
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ABSL_FLAG(bool, stream, false, "stream data to sandbox");
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ABSL_FLAG(bool, decompress, false, "decompress");
ABSL_FLAG(bool, memory_mode, false, "in memory operations");
ABSL_FLAG(uint32_t, level, 0, "compression level");
absl::Status Stream(ZstdApi& api, std::string infile_s, std::string outfile_s) {
std::ifstream infile(infile_s, std::ios::binary);
if (!infile.is_open()) {
return absl::UnavailableError(absl::StrCat("Unable to open ", infile_s));
}
std::ofstream outfile(outfile_s, std::ios::binary);
if (!outfile.is_open()) {
return absl::UnavailableError(absl::StrCat("Unable to open ", outfile_s));
}
if (absl::GetFlag(FLAGS_memory_mode)) {
if (absl::GetFlag(FLAGS_decompress)) {
return DecompressInMemory(api, infile, outfile);
}
return CompressInMemory(api, infile, outfile, absl::GetFlag(FLAGS_level));
}
if (absl::GetFlag(FLAGS_decompress)) {
return DecompressStream(api, infile, outfile);
}
return CompressStream(api, infile, outfile, absl::GetFlag(FLAGS_level));
}
absl::Status FileDescriptor(ZstdApi& api, std::string infile_s,
std::string outfile_s) {
sapi::v::Fd infd(open(infile_s.c_str(), O_RDONLY));
if (infd.GetValue() < 0) {
return absl::UnavailableError(absl::StrCat("Unable to open ", infile_s));
}
sapi::v::Fd outfd(open(outfile_s.c_str(), O_WRONLY | O_CREAT));
if (outfd.GetValue() < 0) {
return absl::UnavailableError(absl::StrCat("Unable to open ", outfile_s));
}
if (absl::GetFlag(FLAGS_memory_mode)) {
if (absl::GetFlag(FLAGS_decompress)) {
return DecompressInMemoryFD(api, infd, outfd);
}
return CompressInMemoryFD(api, infd, outfd, absl::GetFlag(FLAGS_level));
}
if (absl::GetFlag(FLAGS_decompress)) {
return DecompressStreamFD(api, infd, outfd);
}
return CompressStreamFD(api, infd, outfd, absl::GetFlag(FLAGS_level));
}
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int main(int argc, char* argv[]) {
std::string prog_name(argv[0]);
google::InitGoogleLogging(argv[0]);
std::vector<char*> args = absl::ParseCommandLine(argc, argv);
if (args.size() != 3) {
std::cerr << "Usage:\n " << prog_name << " INPUT OUTPUT\n";
return EXIT_FAILURE;
}
ZstdSapiSandbox sandbox;
if (!sandbox.Init().ok()) {
std::cerr << "Unable to start sandbox\n";
return EXIT_FAILURE;
}
ZstdApi api(&sandbox);
absl::Status status;
if (absl::GetFlag(FLAGS_stream)) {
status = Stream(api, argv[1], argv[2]);
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} else {
status = FileDescriptor(api, argv[1], argv[2]);
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}
if (!status.ok()) {
std::cerr << "Unable to ";
std::cerr << (absl::GetFlag(FLAGS_decompress) ? "decompress" : "compress");
std::cerr << " file.\n" << status << "\n";
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}