sysdeps/unix/sysv/linux/i386/fallocate.c

   1 /* Copyright (C) 2007, 2009 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <sysdep.h>
  22
  23
  24 extern int __call_fallocate (int fd, int mode, __off64_t offset, __off64_t len)
  25      attribute_hidden;
  26
  27
  28 /* Reserve storage for the data of the file associated with FD.  */
  29 int
  30 fallocate (int fd, int mode, __off_t offset, __off_t len)
  31 {
  32 #ifdef __NR_fallocate
  33   int err = __call_fallocate (fd, mode, offset, len);
  34   if (__builtin_expect (err, 0))
  35     {
  36       __set_errno (err);
  37       err = -1;
  38     }
  39   return err;
  40 #else
  41   __set_errno (ENOSYS);
  42   return -1;
  43 #endif
  44 }