base/process/process_handle_linux.cc

   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
  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