| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <sys/statfs.h> |
| |
| // Paper over the fact that 32-bit kernels use fstatfs64/statfs64 with |
| // an extra argument, but 64-bit kernels don't have the "64" bit suffix or |
| // the extra size_t argument. |
| #if defined(__LP64__) |
| extern "C" int __fstatfs(int, struct statfs*); |
| extern "C" int __statfs(const char*, struct statfs*); |
| # define __fstatfs64(fd,size,buf) __fstatfs(fd,buf) |
| # define __statfs64(path,size,buf) __statfs(path,buf) |
| #else |
| extern "C" int __fstatfs64(int, size_t, struct statfs*); |
| extern "C" int __statfs64(const char*, size_t, struct statfs*); |
| #endif |
| |
| // The kernel sets a private ST_VALID flag to signal to the C library |
| // whether the f_flags field is valid. This flag should not be exposed to |
| // users of the C library. |
| #define ST_VALID 0x0020 |
| |
| int fstatfs(int fd, struct statfs* result) { |
| int rc = __fstatfs64(fd, sizeof(*result), result); |
| if (rc != 0) { |
| return rc; |
| } |
| result->f_flags &= ~ST_VALID; |
| return 0; |
| } |
| __strong_alias(fstatfs64, fstatfs); |
| |
| int statfs(const char* path, struct statfs* result) { |
| int rc = __statfs64(path, sizeof(*result), result); |
| if (rc != 0) { |
| return rc; |
| } |
| result->f_flags &= ~ST_VALID; |
| return 0; |
| } |
| __strong_alias(statfs64, statfs); |