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 <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
  28 namespace base {
  29
  30 bool 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