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 28 namespace base { 29 GetFileSystemType(const FilePath & path,FileSystemType * type)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