2020-09-10 23:42:00 +08:00
|
|
|
// Copyright 2020 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
|
|
|
|
//
|
|
|
|
// 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 <libgen.h>
|
|
|
|
#include <syscall.h>
|
|
|
|
|
|
|
|
#include <cstdlib>
|
|
|
|
#include <iostream>
|
|
|
|
|
|
|
|
#include "jsonnet_sapi.sapi.h"
|
2020-09-15 00:24:21 +08:00
|
|
|
#include "sandboxed_api/util/flag.h"
|
2020-09-10 23:42:00 +08:00
|
|
|
|
|
|
|
class JsonnetSapiSandbox : public JsonnetSandbox {
|
|
|
|
public:
|
|
|
|
explicit JsonnetSapiSandbox(std::string in_file, std::string out_file)
|
|
|
|
: in_file_(std::move(in_file)), out_file_(std::move(out_file)) {}
|
|
|
|
|
2020-09-15 21:22:47 +08:00
|
|
|
// We need only the input file here, not the whole input directory
|
2020-09-10 23:42:00 +08:00
|
|
|
std::unique_ptr<sandbox2::Policy> ModifyPolicy(
|
|
|
|
sandbox2::PolicyBuilder *) override {
|
|
|
|
return sandbox2::PolicyBuilder()
|
|
|
|
.AllowStaticStartup()
|
|
|
|
.AllowOpen()
|
|
|
|
.AllowRead()
|
|
|
|
.AllowWrite()
|
|
|
|
.AllowStat()
|
|
|
|
.AllowSystemMalloc()
|
|
|
|
.AllowExit()
|
|
|
|
.AllowSyscalls({
|
|
|
|
__NR_futex,
|
|
|
|
__NR_close,
|
|
|
|
})
|
|
|
|
.AddDirectoryAt(dirname(&out_file_[0]), "/output", /*is_ro=*/false)
|
|
|
|
.AddFile(in_file_, true)
|
|
|
|
.BuildOrDie();
|
|
|
|
}
|
|
|
|
|
|
|
|
private:
|
|
|
|
std::string in_file_;
|
|
|
|
std::string out_file_;
|
|
|
|
};
|
|
|
|
|
2020-09-18 20:27:31 +08:00
|
|
|
int main(int argc, char *argv[]) {
|
2020-09-10 23:42:00 +08:00
|
|
|
google::InitGoogleLogging(argv[0]);
|
|
|
|
gflags::ParseCommandLineFlags(&argc, &argv, true);
|
|
|
|
|
|
|
|
if (!(argc == 3)) {
|
|
|
|
std::cerr << "Usage:\n"
|
|
|
|
<< basename(argv[0]) << " absolute/path/to/INPUT.jsonnet"
|
|
|
|
<< " absolute/path/to/OUTPUT.jsonnet\n";
|
|
|
|
return EXIT_FAILURE;
|
|
|
|
}
|
|
|
|
|
|
|
|
std::string in_file(argv[1]);
|
|
|
|
std::string out_file(argv[2]);
|
|
|
|
|
|
|
|
// Initialize sandbox.
|
|
|
|
JsonnetSapiSandbox sandbox(in_file, out_file);
|
|
|
|
absl::Status status = sandbox.Init();
|
|
|
|
CHECK(status.ok()) << "Sandbox initialization failed " << status;
|
|
|
|
|
|
|
|
JsonnetApi api(&sandbox);
|
|
|
|
|
|
|
|
// Initialize library's main structure.
|
|
|
|
sapi::StatusOr<JsonnetVm *> jsonnet_vm = api.c_jsonnet_make();
|
|
|
|
sapi::v::RemotePtr vm_pointer(jsonnet_vm.value());
|
|
|
|
CHECK(jsonnet_vm.ok()) << "JsonnetVm initialization failed: "
|
|
|
|
<< jsonnet_vm.status();
|
|
|
|
|
|
|
|
// Read input file.
|
|
|
|
sapi::v::ConstCStr in_file_var(in_file.c_str());
|
|
|
|
sapi::StatusOr<char *> input =
|
|
|
|
api.c_read_input(false, in_file_var.PtrBefore());
|
|
|
|
CHECK(input.ok()) << "Reading input file failed " << input.status();
|
|
|
|
|
|
|
|
// Process jsonnet data.
|
|
|
|
sapi::v::RemotePtr input_pointer(input.value());
|
|
|
|
sapi::v::Int error;
|
|
|
|
sapi::StatusOr<char *> output = api.c_jsonnet_fmt_snippet(
|
|
|
|
&vm_pointer, in_file_var.PtrBefore(), &input_pointer, error.PtrAfter());
|
|
|
|
CHECK(output.ok() && !error.GetValue())
|
|
|
|
<< "Jsonnet code evaluation failed: " << output.status() << " "
|
|
|
|
<< error.GetValue();
|
|
|
|
|
|
|
|
// Write data to file.
|
|
|
|
std::string out_file_in_sandboxee(std::string("/output/") +
|
|
|
|
basename(&out_file[0]));
|
|
|
|
sapi::v::ConstCStr out_file_var(out_file_in_sandboxee.c_str());
|
|
|
|
sapi::v::RemotePtr output_pointer(output.value());
|
|
|
|
sapi::StatusOr<bool> success;
|
|
|
|
|
|
|
|
success = api.c_write_output_file(&output_pointer, out_file_var.PtrBefore());
|
|
|
|
CHECK(success.ok() && success.value())
|
|
|
|
<< "Writing to output file failed " << success.status() << " "
|
|
|
|
<< success.value();
|
|
|
|
|
|
|
|
// Clean up.
|
|
|
|
sapi::StatusOr<char *> result =
|
|
|
|
api.c_jsonnet_realloc(&vm_pointer, &output_pointer, 0);
|
|
|
|
CHECK(result.ok()) << "JsonnetVm realloc failed: " << result.status();
|
|
|
|
|
|
|
|
status = api.c_jsonnet_destroy(&vm_pointer);
|
|
|
|
CHECK(status.ok()) << "JsonnetVm destroy failed: " << status;
|
|
|
|
|
|
|
|
status = api.c_free_input(&input_pointer);
|
|
|
|
CHECK(status.ok()) << "Input freeing failed: " << status;
|
|
|
|
|
|
|
|
return EXIT_SUCCESS;
|
|
|
|
}
|