sysdeps/unix/sysv/linux/truncate64.c

   1 /* Copyright (C) 1997-2013 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 <sys/types.h>
  19 #include <endian.h>
  20 #include <errno.h>
  21 #include <unistd.h>
  22
  23 #include <sysdep.h>
  24 #include <sys/syscall.h>
  25 #include <bp-checks.h>
  26
  27 /* Truncate the file referenced by FD to LENGTH bytes.  */
  28 int
  29 truncate64 (const char *path, off64_t length)
  30 {
  31   unsigned int low = length & 0xffffffff;
  32   unsigned int high = length >> 32;
  33   int result = INLINE_SYSCALL (truncate64, 3, CHECK_STRING (path),
  34                                __LONG_LONG_PAIR (high, low));
  35   return result;
  36 }