mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Copyright (C) 2007-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <fcntl.h>
|
|
#include <kernel-features.h>
|
|
#include <sysdep.h>
|
|
|
|
#define posix_fallocate static internal_fallocate
|
|
#include <sysdeps/posix/posix_fallocate.c>
|
|
#undef posix_fallocate
|
|
|
|
#if !defined __ASSUME_FALLOCATE && defined __NR_fallocate
|
|
int __have_fallocate attribute_hidden;
|
|
#endif
|
|
|
|
extern int __call_fallocate (int fd, int mode, __off64_t offset, __off64_t len)
|
|
attribute_hidden;
|
|
|
|
/* Reserve storage for the data of the file associated with FD. */
|
|
int
|
|
posix_fallocate (int fd, __off_t offset, __off_t len)
|
|
{
|
|
#ifdef __NR_fallocate
|
|
# ifndef __ASSUME_FALLOCATE
|
|
if (__glibc_likely (__have_fallocate >= 0))
|
|
# endif
|
|
{
|
|
int res = __call_fallocate (fd, 0, offset, len);
|
|
if (! res)
|
|
return 0;
|
|
|
|
# ifndef __ASSUME_FALLOCATE
|
|
if (__glibc_unlikely (res == ENOSYS))
|
|
__have_fallocate = -1;
|
|
else
|
|
# endif
|
|
if (res != EOPNOTSUPP)
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
return internal_fallocate (fd, offset, len);
|
|
}
|