c3-lang/libbsd/src/arc4random_openbsd.h

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• Hash : 874a0e51
  Author :
  Date : 2015-09-23T19:39:47
  

  Update arc4random module from OpenBSD and LibreSSL
  
  Rework arc4random_stir() and arc4random_addrandom() code over the new
  internal API, and documentation in the man page. Adapt the code to the
  local build system.
  
  Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=85827
  

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• src/arc4random_openbsd.h

• /*	$OpenBSD: arc4random.h,v 1.3 2014/07/20 20:51:13 bcook Exp $	*/
  
  /*
   * Copyright (c) 1996, David Mazieres <dm@uun.org>
   * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
   * Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
   * Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  /*
   * Stub functions for portability.
   */
  #include <sys/mman.h>
  
  #include <signal.h>
  
  #include "thread_private.h"
  
  static inline void
  _getentropy_fail(void)
  {
  	raise(SIGKILL);
  }
  
  static inline int
  _rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
  {
  	struct {
  		struct _rs rs;
  		struct _rsx rsx;
  	} *p;
  
  	if ((p = mmap(NULL, sizeof(*p), PROT_READ|PROT_WRITE,
  	    MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
  		return (-1);
  	if (minherit(p, sizeof(*p), MAP_INHERIT_ZERO) == -1) {
  		munmap(p, sizeof(*p));
  		return (-1);
  	}
  
  	*rsp = &p->rs;
  	*rsxp = &p->rsx;
  	return (0);
  }
  
  static inline void
  _rs_forkdetect(void)
  {
  }
  

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