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 <stdint.h> 10 #include <sys/vfs.h> 11 12 #include "base/files/file_path.h" 13 14 namespace base { 15 GetFileSystemType(const FilePath & path,FileSystemType * type)16bool GetFileSystemType(const FilePath& path, FileSystemType* type) { 17 struct statfs statfs_buf; 18 if (statfs(path.value().c_str(), &statfs_buf) < 0) { 19 if (errno == ENOENT) 20 return false; 21 *type = FILE_SYSTEM_UNKNOWN; 22 return true; 23 } 24 25 // Not all possible |statfs_buf.f_type| values are in linux/magic.h. 26 // Missing values are copied from the statfs man page. 27 // In some platforms, |statfs_buf.f_type| is declared as signed, but some of 28 // the values will overflow it, causing narrowing warnings. Cast to the 29 // largest possible unsigned integer type to avoid it. 30 switch (static_cast<uintmax_t>(statfs_buf.f_type)) { 31 case 0: 32 *type = FILE_SYSTEM_0; 33 break; 34 case EXT2_SUPER_MAGIC: // Also ext3 and ext4 35 case MSDOS_SUPER_MAGIC: 36 case REISERFS_SUPER_MAGIC: 37 case BTRFS_SUPER_MAGIC: 38 case 0x5346544E: // NTFS 39 case 0x58465342: // XFS 40 case 0x3153464A: // JFS 41 *type = FILE_SYSTEM_ORDINARY; 42 break; 43 case NFS_SUPER_MAGIC: 44 *type = FILE_SYSTEM_NFS; 45 break; 46 case SMB_SUPER_MAGIC: 47 case 0xFF534D42: // CIFS 48 *type = FILE_SYSTEM_SMB; 49 break; 50 case CODA_SUPER_MAGIC: 51 *type = FILE_SYSTEM_CODA; 52 break; 53 case HUGETLBFS_MAGIC: 54 case RAMFS_MAGIC: 55 case TMPFS_MAGIC: 56 *type = FILE_SYSTEM_MEMORY; 57 break; 58 case CGROUP_SUPER_MAGIC: 59 *type = FILE_SYSTEM_CGROUP; 60 break; 61 default: 62 *type = FILE_SYSTEM_OTHER; 63 } 64 return true; 65 } 66 67 } // namespace base 68