1 // Copyright 2022 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <fcntl.h>
16 #include <unistd.h>
17
18 #include <cstdlib>
19 #include <fstream>
20 #include <iostream>
21 #include <string>
22 #include <vector>
23
24 #include "absl/flags/flag.h"
25 #include "absl/flags/parse.h"
26 #include "absl/log/globals.h"
27 #include "absl/log/initialize.h"
28 #include "contrib/zstd/sandboxed.h"
29 #include "contrib/zstd/utils/utils_zstd.h"
30
31 ABSL_FLAG(bool, stream, false, "stream data to sandbox");
32 ABSL_FLAG(bool, decompress, false, "decompress");
33 ABSL_FLAG(bool, memory_mode, false, "in memory operations");
34 ABSL_FLAG(uint32_t, level, 0, "compression level");
35
Stream(ZstdApi & api,std::string infile_s,std::string outfile_s)36 absl::Status Stream(ZstdApi& api, std::string infile_s, std::string outfile_s) {
37 std::ifstream infile(infile_s, std::ios::binary);
38 if (!infile.is_open()) {
39 return absl::UnavailableError(absl::StrCat("Unable to open ", infile_s));
40 }
41 std::ofstream outfile(outfile_s, std::ios::binary);
42 if (!outfile.is_open()) {
43 return absl::UnavailableError(absl::StrCat("Unable to open ", outfile_s));
44 }
45
46 if (absl::GetFlag(FLAGS_memory_mode)) {
47 if (absl::GetFlag(FLAGS_decompress)) {
48 return DecompressInMemory(api, infile, outfile);
49 }
50 return CompressInMemory(api, infile, outfile, absl::GetFlag(FLAGS_level));
51 }
52 if (absl::GetFlag(FLAGS_decompress)) {
53 return DecompressStream(api, infile, outfile);
54 }
55 return CompressStream(api, infile, outfile, absl::GetFlag(FLAGS_level));
56 }
57
FileDescriptor(ZstdApi & api,std::string infile_s,std::string outfile_s)58 absl::Status FileDescriptor(ZstdApi& api, std::string infile_s,
59 std::string outfile_s) {
60 sapi::v::Fd infd(open(infile_s.c_str(), O_RDONLY));
61 if (infd.GetValue() < 0) {
62 return absl::UnavailableError(absl::StrCat("Unable to open ", infile_s));
63 }
64 sapi::v::Fd outfd(open(outfile_s.c_str(), O_WRONLY | O_CREAT));
65 if (outfd.GetValue() < 0) {
66 return absl::UnavailableError(absl::StrCat("Unable to open ", outfile_s));
67 }
68
69 if (absl::GetFlag(FLAGS_memory_mode)) {
70 if (absl::GetFlag(FLAGS_decompress)) {
71 return DecompressInMemoryFD(api, infd, outfd);
72 }
73 return CompressInMemoryFD(api, infd, outfd, absl::GetFlag(FLAGS_level));
74 }
75 if (absl::GetFlag(FLAGS_decompress)) {
76 return DecompressStreamFD(api, infd, outfd);
77 }
78 return CompressStreamFD(api, infd, outfd, absl::GetFlag(FLAGS_level));
79 }
80
main(int argc,char * argv[])81 int main(int argc, char* argv[]) {
82 std::string prog_name(argv[0]);
83 absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
84 std::vector<char*> args = absl::ParseCommandLine(argc, argv);
85 absl::InitializeLog();
86
87 if (args.size() != 3) {
88 std::cerr << "Usage:\n " << prog_name << " INPUT OUTPUT\n";
89 return EXIT_FAILURE;
90 }
91
92 ZstdSapiSandbox sandbox;
93 if (!sandbox.Init().ok()) {
94 std::cerr << "Unable to start sandbox\n";
95 return EXIT_FAILURE;
96 }
97
98 ZstdApi api(&sandbox);
99
100 absl::Status status;
101 if (absl::GetFlag(FLAGS_stream)) {
102 status = Stream(api, argv[1], argv[2]);
103 } else {
104 status = FileDescriptor(api, argv[1], argv[2]);
105 }
106
107 if (!status.ok()) {
108 std::cerr << "Unable to ";
109 std::cerr << (absl::GetFlag(FLAGS_decompress) ? "decompress" : "compress");
110 std::cerr << " file.\n" << status << "\n";
111 return EXIT_FAILURE;
112 }
113
114 return EXIT_SUCCESS;
115 }
116