glibc/sysdeps/unix/sysv/linux/posix_fallocate64.c

/* 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 <sysdep.h>

extern int __posix_fallocate64_l64 (int fd, __off64_t offset, __off64_t len);
#define __posix_fallocate64_l64 static internal_fallocate64
#include <sysdeps/posix/posix_fallocate64.c>
#undef __posix_fallocate64_l64

/* Reserve storage for the data of the file associated with FD.  */
int
__posix_fallocate64_l64 (int fd, __off64_t offset, __off64_t len)
{
  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_CALL (fallocate, err, fd, 0,
				   SYSCALL_LL64 (offset), SYSCALL_LL64 (len));
#endif
  if (! INTERNAL_SYSCALL_ERROR_P (res, err))
    return 0;
  if (INTERNAL_SYSCALL_ERRNO (res, err) != EOPNOTSUPP)
    return INTERNAL_SYSCALL_ERRNO (res, err);
  return internal_fallocate64 (fd, offset, len);
}