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// Make sure some of the newer macros from magic.h are defined.
14// TODO(mostynb@opera.com): remove this after 2014.
15#ifndef BTRFS_SUPER_MAGIC
16#define BTRFS_SUPER_MAGIC 0x9123683E
17#endif
18#ifndef HUGETLBFS_MAGIC
19#define HUGETLBFS_MAGIC 0x958458f6
20#endif
21#ifndef RAMFS_MAGIC
22#define RAMFS_MAGIC 0x858458f6
23#endif
24#ifndef TMPFS_MAGIC
25#define TMPFS_MAGIC 0x01021994
26#endif
27
28namespace base {
29
30bool GetFileSystemType(const FilePath& path, FileSystemType* type) {
31  struct statfs statfs_buf;
32  if (statfs(path.value().c_str(), &statfs_buf) < 0) {
33    if (errno == ENOENT)
34      return false;
35    *type = FILE_SYSTEM_UNKNOWN;
36    return true;
37  }
38
39  // Not all possible |statfs_buf.f_type| values are in linux/magic.h.
40  // Missing values are copied from the statfs man page.
41  switch (statfs_buf.f_type) {
42    case 0:
43      *type = FILE_SYSTEM_0;
44      break;
45    case EXT2_SUPER_MAGIC:  // Also ext3 and ext4
46    case MSDOS_SUPER_MAGIC:
47    case REISERFS_SUPER_MAGIC:
48    case BTRFS_SUPER_MAGIC:
49    case 0x5346544E:  // NTFS
50    case 0x58465342:  // XFS
51    case 0x3153464A:  // JFS
52      *type = FILE_SYSTEM_ORDINARY;
53      break;
54    case NFS_SUPER_MAGIC:
55      *type = FILE_SYSTEM_NFS;
56      break;
57    case SMB_SUPER_MAGIC:
58    case 0xFF534D42:  // CIFS
59      *type = FILE_SYSTEM_SMB;
60      break;
61    case CODA_SUPER_MAGIC:
62      *type = FILE_SYSTEM_CODA;
63      break;
64    case HUGETLBFS_MAGIC:
65    case RAMFS_MAGIC:
66    case TMPFS_MAGIC:
67      *type = FILE_SYSTEM_MEMORY;
68      break;
69    case CGROUP_SUPER_MAGIC:
70      *type = FILE_SYSTEM_CGROUP;
71      break;
72    default:
73      *type = FILE_SYSTEM_OTHER;
74  }
75  return true;
76}
77
78}  // namespace base
79