sandboxed-api/sandboxed_api/sandbox2/fork_client.cc
Christian Blichmann 4c87556901 Use Abseil's log/flags instead of glog/gflags
Follow-up changes might be required to fully fix up the contrib sandboxes.

PiperOrigin-RevId: 482475998
Change-Id: Iff631eb838a024b2f047a1be61bb27e35a8ff2f4
2022-10-20 06:48:51 -07:00

77 lines
2.4 KiB
C++

// 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
//
// 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 "sandboxed_api/sandbox2/fork_client.h"
#include "absl/log/check.h"
#include "absl/log/log.h"
#include "sandboxed_api/sandbox2/comms.h"
#include "sandboxed_api/sandbox2/forkserver.pb.h"
namespace sandbox2 {
pid_t ForkClient::SendRequest(const ForkRequest& request, int exec_fd,
int comms_fd, int user_ns_fd, pid_t* init_pid) {
// Acquire the channel ownership for this request (transaction).
absl::MutexLock l(&comms_mutex_);
if (!comms_->SendProtoBuf(request)) {
LOG(ERROR) << "Sending PB to the ForkServer failed";
return -1;
}
CHECK(comms_fd != -1) << "comms_fd was not properly set up";
if (!comms_->SendFD(comms_fd)) {
LOG(ERROR) << "Sending Comms FD (" << comms_fd
<< ") to the ForkServer failed";
return -1;
}
if (request.mode() == FORKSERVER_FORK_EXECVE ||
request.mode() == FORKSERVER_FORK_EXECVE_SANDBOX) {
CHECK(exec_fd != -1) << "exec_fd cannot be -1 in execve mode";
if (!comms_->SendFD(exec_fd)) {
LOG(ERROR) << "Sending Exec FD (" << exec_fd
<< ") to the ForkServer failed";
return -1;
}
}
if (request.mode() == FORKSERVER_FORK_JOIN_SANDBOX_UNWIND) {
CHECK(user_ns_fd != -1) << "user_ns_fd cannot be -1 in unwind mode";
if (!comms_->SendFD(user_ns_fd)) {
LOG(ERROR) << "Sending user ns FD (" << user_ns_fd
<< ") to the ForkServer failed";
return -1;
}
}
int32_t pid;
// Receive init process ID.
if (!comms_->RecvInt32(&pid)) {
LOG(ERROR) << "Receiving init PID from the ForkServer failed";
return -1;
}
if (init_pid) {
*init_pid = static_cast<pid_t>(pid);
}
// Receive sandboxee process ID.
if (!comms_->RecvInt32(&pid)) {
LOG(ERROR) << "Receiving sandboxee PID from the ForkServer failed";
return -1;
}
return static_cast<pid_t>(pid);
}
} // namespace sandbox2