1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/process/process_handle.h"
6
7#include <sys/sysctl.h>
8#include <sys/types.h>
9
10#include "base/logging.h"
11
12namespace base {
13
14ProcessId GetParentProcessId(ProcessHandle process) {
15  struct kinfo_proc info;
16  size_t length = sizeof(struct kinfo_proc);
17  int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process };
18  if (sysctl(mib, 4, &info, &length, NULL, 0) < 0) {
19    DPLOG(ERROR) << "sysctl";
20    return -1;
21  }
22  if (length == 0)
23    return -1;
24  return info.kp_eproc.e_ppid;
25}
26
27}  // namespace base
28