1// Copyright (c) 2011 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#include <unistd.h>
10
11namespace base {
12
13ProcessId GetParentProcessId(ProcessHandle process) {
14  struct kinfo_proc info;
15  size_t length;
16  int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process,
17                sizeof(struct kinfo_proc), 0 };
18
19  if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
20    return -1;
21
22  mib[5] = (length / sizeof(struct kinfo_proc));
23
24  if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
25    return -1;
26
27  return info.p_ppid;
28}
29
30FilePath GetProcessExecutablePath(ProcessHandle process) {
31  struct kinfo_proc kp;
32  size_t len;
33  int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process,
34                sizeof(struct kinfo_proc), 0 };
35
36  if (sysctl(mib, arraysize(mib), NULL, &len, NULL, 0) == -1)
37    return FilePath();
38  mib[5] = (len / sizeof(struct kinfo_proc));
39  if (sysctl(mib, arraysize(mib), &kp, &len, NULL, 0) < 0)
40    return FilePath();
41  if ((kp.p_flag & P_SYSTEM) != 0)
42    return FilePath();
43  if (strcmp(kp.p_comm, "chrome") == 0)
44    return FilePath(kp.p_comm);
45
46  return FilePath();
47}
48
49}  // namespace base
50