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      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/file_util.h"
      8 #include "base/process/internal_linux.h"
      9 
     10 namespace base {
     11 
     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 
     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