support/xmmap.c

   1 /* mmap with error checking.
   2    Copyright (C) 2016-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <support/check.h>
  20 #include <support/xunistd.h>
  21 #include <sys/mman.h>
  22
  23 void *
  24 xmmap (void *addr, size_t length, int prot, int flags, int fd)
  25 {
  26   void *result = mmap (addr, length, prot, flags, fd, 0);
  27   if (result == MAP_FAILED)
  28     FAIL_EXIT1 ("mmap of %zu bytes, prot=0x%x, flags=0x%x: %m",
  29                 length, prot, flags);
  30   return result;
  31 }