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 "base/files/file_util.h"
8 #include "base/process/internal_linux.h"
9 
10 namespace base {
11 
GetParentProcessId(ProcessHandle process)12 ProcessId GetParentProcessId(ProcessHandle process) {
13   ProcessId pid =
14       internal::ReadProcStatsAndGetFieldAsInt64(process, internal::VM_PPID);
15   if (pid)
16     return pid;
17   return -1;
18 }
19 
GetProcessExecutablePath(ProcessHandle process)20 FilePath GetProcessExecutablePath(ProcessHandle process) {
21   FilePath stat_file = internal::GetProcPidDir(process).Append("exe");
22   FilePath exe_name;
23   if (!ReadSymbolicLink(stat_file, &exe_name)) {
24     // No such process.  Happens frequently in e.g. TerminateAllChromeProcesses
25     return FilePath();
26   }
27   return exe_name;
28 }
29 
30 }  // namespace base
31