base/files/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/files/file_util.h"
   6
   7 #include <errno.h>
   8 #include <linux/magic.h>
   9 #include <sys/vfs.h>
  10
  11 #include "base/files/file_path.h"
  12
  13 namespace base {
  14
  15 bool GetFileSystemType(const FilePath& path, FileSystemType* type) {
  16   struct statfs statfs_buf;
  17   if (statfs(path.value().c_str(), &statfs_buf) < 0) {
  18     if (errno == ENOENT)
  19       return false;
  20     *type = FILE_SYSTEM_UNKNOWN;
  21     return true;
  22   }
  23
  24   // Not all possible |statfs_buf.f_type| values are in linux/magic.h.
  25   // Missing values 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 EXT2_SUPER_MAGIC:  // Also ext3 and ext4
  31     case MSDOS_SUPER_MAGIC:
  32     case REISERFS_SUPER_MAGIC:
  33     case BTRFS_SUPER_MAGIC:
  34     case 0x5346544E:  // NTFS
  35     case 0x58465342:  // XFS
  36     case 0x3153464A:  // JFS
  37       *type = FILE_SYSTEM_ORDINARY;
  38       break;
  39     case NFS_SUPER_MAGIC:
  40       *type = FILE_SYSTEM_NFS;
  41       break;
  42     case SMB_SUPER_MAGIC:
  43     case 0xFF534D42:  // CIFS
  44       *type = FILE_SYSTEM_SMB;
  45       break;
  46     case CODA_SUPER_MAGIC:
  47       *type = FILE_SYSTEM_CODA;
  48       break;
  49     case HUGETLBFS_MAGIC:
  50     case RAMFS_MAGIC:
  51     case TMPFS_MAGIC:
  52       *type = FILE_SYSTEM_MEMORY;
  53       break;
  54     case CGROUP_SUPER_MAGIC:
  55       *type = FILE_SYSTEM_CGROUP;
  56       break;
  57     default:
  58       *type = FILE_SYSTEM_OTHER;
  59   }
  60   return true;
  61 }
  62
  63 }  // namespace base