sysdeps/unix/sysv/linux/fallocate64.c

   1 /* Copyright (C) 2007, 2009, 2011 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-cancel.h>
  22
  23
  24 /* Reserve storage for the data of the file associated with FD.  */
  25 int
  26 fallocate64 (int fd, int mode, __off64_t offset, __off64_t len)
  27 {
  28 #ifdef __NR_fallocate
  29   if (SINGLE_THREAD_P)
  30     return INLINE_SYSCALL (fallocate, 6, fd, mode,
  31                            __LONG_LONG_PAIR ((long int) (offset >> 32),
  32                                              (long int) offset),
  33                            __LONG_LONG_PAIR ((long int) (len >> 32),
  34                                              (long int) len));
  35
  36   int result;
  37   int oldtype = LIBC_CANCEL_ASYNC ();
  38
  39   result = INLINE_SYSCALL (fallocate, 6, fd, mode,
  40                            __LONG_LONG_PAIR ((long int) (offset >> 32),
  41                                              (long int) offset),
  42                            __LONG_LONG_PAIR ((long int) (len >> 32),
  43                                              (long int) len));
  44
  45   LIBC_CANCEL_RESET (oldtype);
  46
  47   return result;
  48 #else
  49   __set_errno (ENOSYS);
  50   return -1;
  51 #endif
  52 }