sysdeps/unix/bsd/bsd4.4/kfreebsd/shm_open.c

   1 /* Copyright (C) 2014 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 <sys/mman.h>
  20 #include <fcntl.h>
  21 #include <sysdep.h>
  22
  23 extern int __syscall_shm_open (const char *name, int flag, mode_t mode);
  24 libc_hidden_proto (__syscall_shm_open)
  25
  26 int
  27 shm_open (const char *name, int flag, mode_t mode)
  28 {
  29   /*
  30    * O_CLOEXEC never has any effect on shm_open(). However, old kernel
  31    * versions (prior to rev 261138 in HEAD) return EINVAL when this
  32    * (otherwise harmless) flag is used.
  33    */
  34   flag &= ~O_CLOEXEC;
  35
  36   return INLINE_SYSCALL (shm_open, 3, name, flag, mode);
  37 }