sysdeps/unix/sysv/linux/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 <errno.h>
  19 #include <fcntl.h>
  20 #include <sysdep-cancel.h>
  21
  22
  23 /* Reserve storage for the data of the file associated with FD.  */
  24 int
  25 fallocate64 (int fd, int mode, __off64_t offset, __off64_t len)
  26 {
  27 #ifdef __NR_fallocate
  28   if (SINGLE_THREAD_P)
  29     return INLINE_SYSCALL (fallocate, 6, fd, mode,
  30                            __LONG_LONG_PAIR ((long int) (offset >> 32),
  31                                              (long int) offset),
  32                            __LONG_LONG_PAIR ((long int) (len >> 32),
  33                                              (long int) len));
  34
  35   int result;
  36   int oldtype = LIBC_CANCEL_ASYNC ();
  37
  38   result = INLINE_SYSCALL (fallocate, 6, fd, mode,
  39                            __LONG_LONG_PAIR ((long int) (offset >> 32),
  40                                              (long int) offset),
  41                            __LONG_LONG_PAIR ((long int) (len >> 32),
  42                                              (long int) len));
  43
  44   LIBC_CANCEL_RESET (oldtype);
  45
  46   return result;
  47 #else
  48   __set_errno (ENOSYS);
  49   return -1;
  50 #endif
  51 }