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/* Copyright (C) 2007-2013 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 (__builtin_expect (__have_fallocate >= 0, 1))
# endif
{
int res = __call_fallocate (fd, 0, offset, len);
if (! res)
return 0;
# ifndef __ASSUME_FALLOCATE
if (__builtin_expect (res == ENOSYS, 0))
__have_fallocate = -1;
else
# endif
if (res != EOPNOTSUPP)
return res;
}
#endif
return internal_fallocate (fd, offset, len);
}
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