b36efa4343
Triggers -Wundef, which is on in -Weverything. Bug: http://b/31496165 Change-Id: Ib06107073f7dd1d584c19c222d0430da9d35630b
91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
/*
|
|
* 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/statvfs.h>
|
|
|
|
#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
|
|
|
|
static void __statfs_to_statvfs(const struct statfs& in, struct statvfs* out) {
|
|
out->f_bsize = in.f_bsize;
|
|
out->f_frsize = in.f_frsize;
|
|
out->f_blocks = in.f_blocks;
|
|
out->f_bfree = in.f_bfree;
|
|
out->f_bavail = in.f_bavail;
|
|
out->f_files = in.f_files;
|
|
out->f_ffree = in.f_ffree;
|
|
out->f_favail = in.f_ffree;
|
|
out->f_fsid = in.f_fsid.__val[0] | (static_cast<uint64_t>(in.f_fsid.__val[1]) << 32);
|
|
out->f_flag = in.f_flags;
|
|
out->f_namemax = in.f_namelen;
|
|
}
|
|
|
|
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);
|
|
|
|
int statvfs(const char* path, struct statvfs* result) {
|
|
struct statfs tmp;
|
|
int rc = statfs(path, &tmp);
|
|
if (rc != 0) {
|
|
return rc;
|
|
}
|
|
__statfs_to_statvfs(tmp, result);
|
|
return 0;
|
|
}
|
|
__strong_alias(statvfs64, statvfs);
|
|
|
|
int fstatvfs(int fd, struct statvfs* result) {
|
|
struct statfs tmp;
|
|
int rc = fstatfs(fd, &tmp);
|
|
if (rc != 0) {
|
|
return rc;
|
|
}
|
|
__statfs_to_statvfs(tmp, result);
|
|
return 0;
|
|
}
|
|
__strong_alias(fstatvfs64, fstatvfs);
|