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
27 extern "C" int __fstatfs64(int, size_t, struct statfs*);
28 extern "C" int __statfs64(const char*, size_t, struct statfs*);
29 #endif
30
31 #define ST_VALID 0x0020
32
__statfs_to_statvfs(const struct statfs & in,struct statvfs * out)33 static 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
statvfs(const char * path,struct statvfs * result)47 int 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
fstatvfs(int fd,struct statvfs * result)58 int 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