sysdeps/unix/sysv/linux/posix_fallocate64.c

   1 /* Copyright (C) 2007-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <fcntl.h>
  19 #include <sysdep.h>
  20
  21 extern int __posix_fallocate64_l64 (int fd, __off64_t offset, __off64_t len);
  22 #define __posix_fallocate64_l64 static internal_fallocate64
  23 #include <sysdeps/posix/posix_fallocate64.c>
  24 #undef __posix_fallocate64_l64
  25
  26 /* Reserve storage for the data of the file associated with FD.  */
  27 int
  28 __posix_fallocate64_l64 (int fd, __off64_t offset, __off64_t len)
  29 {
  30   INTERNAL_SYSCALL_DECL (err);
  31   int res = INTERNAL_SYSCALL (fallocate, err, 6, fd, 0,
  32                               __LONG_LONG_PAIR ((long int) (offset >> 32),
  33                                                 (long int) offset),
  34                               __LONG_LONG_PAIR ((long int) (len >> 32),
  35                                                 (long int) len));
  36
  37   if (! INTERNAL_SYSCALL_ERROR_P (res, err))
  38     return 0;
  39   if (INTERNAL_SYSCALL_ERRNO (res, err) != EOPNOTSUPP)
  40     return INTERNAL_SYSCALL_ERRNO (res, err);
  41   return internal_fallocate64 (fd, offset, len);
  42 }