1/* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <sys/statvfs.h> 18 19#include <sys/statfs.h> 20 21// Paper over the fact that 32-bit kernels use fstatfs64/statfs64 with an extra argument, 22// but 64-bit kernels don't have the "64" bit suffix or the extra size_t argument. 23#if __LP64__ 24# define __fstatfs64(fd,size,buf) fstatfs(fd,buf) 25# define __statfs64(path,size,buf) statfs(path,buf) 26#else 27extern "C" int __fstatfs64(int, size_t, struct statfs*); 28extern "C" int __statfs64(const char*, size_t, struct statfs*); 29#endif 30 31#define ST_VALID 0x0020 32 33static void __statfs_to_statvfs(const struct statfs& in, struct statvfs* out) { 34 out->f_bsize = in.f_bsize; 35 out->f_frsize = in.f_frsize; 36 out->f_blocks = in.f_blocks; 37 out->f_bfree = in.f_bfree; 38 out->f_bavail = in.f_bavail; 39 out->f_files = in.f_files; 40 out->f_ffree = in.f_ffree; 41 out->f_favail = in.f_ffree; 42 out->f_fsid = in.f_fsid.__val[0] | (static_cast<uint64_t>(in.f_fsid.__val[1]) << 32); 43 out->f_flag = in.f_flags & ~ST_VALID; 44 out->f_namemax = in.f_namelen; 45} 46 47int statvfs(const char* path, struct statvfs* result) { 48 struct statfs tmp; 49 int rc = __statfs64(path, sizeof(tmp), &tmp); 50 if (rc != 0) { 51 return rc; 52 } 53 __statfs_to_statvfs(tmp, result); 54 return 0; 55} 56__strong_alias(statvfs64, statvfs); 57 58int fstatvfs(int fd, struct statvfs* result) { 59 struct statfs tmp; 60 int rc = __fstatfs64(fd, sizeof(tmp), &tmp); 61 if (rc != 0) { 62 return rc; 63 } 64 __statfs_to_statvfs(tmp, result); 65 return 0; 66} 67__strong_alias(fstatvfs64, fstatvfs); 68