base/file_util_linux.cc

   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/file_util.h"
   6
   7 #include "base/files/file_path.h"
   8
   9 #include <errno.h>
  10 #include <sys/vfs.h>
  11
  12 namespace file_util {
  13
  14 bool GetFileSystemType(const base::FilePath& path, FileSystemType* type) {
  15   struct statfs statfs_buf;
  16   if (statfs(path.value().c_str(), &statfs_buf) < 0) {
  17     if (errno == ENOENT)
  18       return false;
  19     *type = FILE_SYSTEM_UNKNOWN;
  20     return true;
  21   }
  22
  23   // While you would think the possible values of f_type would be available
  24   // in a header somewhere, it appears that is not the case.  These values
  25   // are copied from the statfs man page.
  26   switch (statfs_buf.f_type) {
  27     case 0:
  28       *type = FILE_SYSTEM_0;
  29       break;
  30     case 0xEF53:  // ext2, ext3.
  31     case 0x4D44:  // dos
  32     case 0x5346544E:  // NFTS
  33     case 0x52654973:  // reiser
  34     case 0x58465342:  // XFS
  35     case 0x9123683E:  // btrfs
  36     case 0x3153464A:  // JFS
  37       *type = FILE_SYSTEM_ORDINARY;
  38       break;
  39     case 0x6969:  // NFS
  40       *type = FILE_SYSTEM_NFS;
  41       break;
  42     case 0xFF534D42:  // CIFS
  43     case 0x517B:  // SMB
  44       *type = FILE_SYSTEM_SMB;
  45       break;
  46     case 0x73757245:  // Coda
  47       *type = FILE_SYSTEM_CODA;
  48       break;
  49     case 0x858458f6:  // ramfs
  50     case 0x01021994:  // tmpfs
  51       *type = FILE_SYSTEM_MEMORY;
  52       break;
  53     case 0x27e0eb: // CGROUP
  54       *type = FILE_SYSTEM_CGROUP;
  55       break;
  56     default:
  57       *type = FILE_SYSTEM_OTHER;
  58   }
  59   return true;
  60 }
  61
  62 }  // namespace