pidfd.h

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/*
 * Copyright (C) 2024 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.
 */
#ifndef ANDROID_DEVICE_GOOGLE_CUTTLEFISH_HOST_COMMANDS_SANDBOX_PROCESS_PIDFD_H
#define ANDROID_DEVICE_GOOGLE_CUTTLEFISH_HOST_COMMANDS_SANDBOX_PROCESS_PIDFD_H
 
#include <sys/types.h>
 
#include <utility>
#include <vector>
 
#include "absl/status/statusor.h"
#include "absl/types/span.h"
#include "sandboxed_api/util/fileops.h"
 
namespace cuttlefish::process_sandboxer {
 
class PidFd {
 public:
  static absl::StatusOr<PidFd> FromRunningProcess(pid_t pid);
 
  static absl::StatusOr<PidFd> LaunchSubprocess(
      absl::Span<const std::string> argv,
      std::vector<std::pair<sapi::file_util::fileops::FDCloser, int>> fds,
      absl::Span<const std::string> env);
 
  int Get() const;
 
  absl::StatusOr<
      std::vector<std::pair<sapi::file_util::fileops::FDCloser, int>>>
  AllFds();
  absl::StatusOr<std::vector<std::string>> Argv();
  absl::StatusOr<std::vector<std::string>> Env();
 
  absl::Status HaltHierarchy();
  absl::Status HaltChildHierarchy();
 
 private:
  PidFd(sapi::file_util::fileops::FDCloser, pid_t);
  absl::Status SendSignal(int signal);
 
  sapi::file_util::fileops::FDCloser fd_;
  pid_t pid_;
};
 
}  // namespace cuttlefish::process_sandboxer
#endif