sandboxed-api/sandboxed_api/sandbox2/forkserver.proto

// Copyright 2019 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.

// A proto for the sandbox2::Forkserver class

syntax = "proto3";

package sandbox2;

import "sandboxed_api/sandbox2/mount_tree.proto";

enum Mode {
  // Default value
  FORKSERVER_FORK_UNSPECIFIED = 0;
  // Fork, execve and sandbox
  FORKSERVER_FORK_EXECVE_SANDBOX = 1;
  // Fork and execve, but no sandboxing
  FORKSERVER_FORK_EXECVE = 2;
  // Just fork
  FORKSERVER_FORK = 3;
  // Special internal case: join a user namespace prior to unwinding
  FORKSERVER_FORK_JOIN_SANDBOX_UNWIND = 4;
}

message ForkRequest {
  // List of arguments, starting with argv[0]
  repeated bytes args = 1;
  // List of environment variables which will be passed to the child
  repeated bytes envs = 2;

  // How to interpret the request
  optional Mode mode = 3;

  // Clone flags for the new process
  optional int32 clone_flags = 4;

  // Capabilities to keep when starting the sandboxee
  repeated int32 capabilities = 5;

  // The mount tree used for namespace initialization
  optional MountTree mount_tree = 6;

  // Hostname in the network namespace
  optional bytes hostname = 7;

  // Changes mount propagation from MS_PRIVATE to MS_SLAVE if set
  optional bool allow_mount_propagation = 8;
}