lib/libc/include/env.h

   1 /*      $NetBSD: env.h,v 1.2 2010/11/14 22:04:36 tron Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2010 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Matthias Scheler.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/types.h>
  33
  34 #include <stdbool.h>
  35
  36 #include "reentrant.h"
  37
  38 extern ssize_t __getenvslot(const char *name, size_t l_name, bool allocate);
  39 extern char *__findenvvar(const char *name, size_t l_name);
  40
  41 #ifdef _REENTRANT
  42 extern bool __readlockenv(void);
  43 extern bool __writelockenv(void);
  44 extern bool __unlockenv(void);
  45 #else
  46 static __inline bool
  47 __readlockenv(void)
  48 {
  49         return true;
  50 }
  51
  52 static __inline bool
  53 __writelockenv(void)
  54 {
  55         return true;
  56 }
  57
  58 static __inline bool
  59 #if defined(__minix)
  60 __unlockenv(void)
  61 #else /* Bug-to-bug compatibility? LSC: FIXME We should upstream that. */
  62 __unlocklockenv(void)
  63 #endif /* defined(__minix) */
  64 {
  65         return true;
  66 }
  67 #endif
  68
  69 extern char **environ;