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/* Copyright (C) 2007-2016 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
/* The alpha architecture introduced the fallocate system call in
2.6.33-rc1, so we still need the fallback code. */
#if !defined __ASSUME_FALLOCATE && defined __NR_fallocate
static int __have_fallocate;
#endif
/* 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
{
INTERNAL_SYSCALL_DECL (err);
# ifdef INTERNAL_SYSCALL_TYPES
int res = INTERNAL_SYSCALL_TYPES (fallocate, err, 4, int, fd,
int, 0, off_t, offset,
off_t, len);
# else
int res = INTERNAL_SYSCALL (fallocate, err, 4, fd, 0, offset, len);
# endif
if (! INTERNAL_SYSCALL_ERROR_P (res, err))
return 0;
# ifndef __ASSUME_FALLOCATE
if (__glibc_unlikely (INTERNAL_SYSCALL_ERRNO (res, err) == ENOSYS))
__have_fallocate = -1;
else
# endif
if (INTERNAL_SYSCALL_ERRNO (res, err) != EOPNOTSUPP)
return INTERNAL_SYSCALL_ERRNO (res, err);
}
#endif
return internal_fallocate (fd, offset, len);
}
weak_alias (posix_fallocate, posix_fallocate64)
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