ports/sysdeps/unix/sysv/linux/generic/wordsize-32/posix_fadvise.c

   1 /* Copyright (C) 2011-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <sysdep.h>
  22
  23 /* Advice the system about the expected behaviour of the application with
  24    respect to the file associated with FD.  */
  25
  26 int
  27 posix_fadvise (int fd, off_t offset, off_t len, int advise)
  28 {
  29   INTERNAL_SYSCALL_DECL (err);
  30   int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd,
  31                               __LONG_LONG_PAIR (offset >> 31, offset),
  32                               __LONG_LONG_PAIR (len >> 31, len),
  33                               advise);
  34   if (INTERNAL_SYSCALL_ERROR_P (ret, err))
  35     return INTERNAL_SYSCALL_ERRNO (ret, err);
  36   return 0;
  37 }