debugd/src/tracepath_tool.cc

// Copyright 2012 The ChromiumOS Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "debugd/src/tracepath_tool.h"

#include <unistd.h>

#include <base/logging.h>

#include "debugd/src/process_with_id.h"

namespace debugd {

namespace {

constexpr char kTracepath[] = "/usr/bin/tracepath";
constexpr char kTracepath6[] = "/usr/bin/tracepath6";

}  // namespace

std::string TracePathTool::Start(const base::ScopedFD& outfd,
                                 const std::string& destination,
                                 const brillo::VariantDictionary& options) {
  ProcessWithId* p =
      CreateProcess(true /* sandboxed */, false /* access_root_mount_ns */);
  if (!p) {
    return "";
  }

  if (brillo::GetVariantValueOrDefault<bool>(options, "v6")) {
    p->AddArg(kTracepath6);
  } else {
    p->AddArg(kTracepath);
  }

  if (options.count("numeric") == 1) {
    p->AddArg("-n");
  }

  p->AddArg(destination);
  p->BindFd(outfd.get(), STDOUT_FILENO);
  p->BindFd(outfd.get(), STDERR_FILENO);
  LOG(INFO) << "tracepath: running process id: " << p->id();
  p->Start();
  return p->id();
}

}  // namespace debugd