lib/libc/uuid/uuid_create.c

   1 /*      $NetBSD: uuid_create.c,v 1.1 2004/09/13 21:44:54 thorpej Exp $  */
   2
   3 /*-
   4  * Copyright (c) 2002 Marcel Moolenaar
   5  * Copyright (c) 2002 Hiten Mahesh Pandya
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/lib/libc/uuid/uuid_create.c,v 1.2 2003/08/08 19:18:43 marcel Exp $
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 __RCSID("$NetBSD: uuid_create.c,v 1.1 2004/09/13 21:44:54 thorpej Exp $");
  35 #endif
  36
  37 #include "namespace.h"
  38
  39 #include <uuid.h>
  40
  41 #if defined(__minix)
  42 #include <paths.h>
  43 #include <fcntl.h>
  44 #include <unistd.h>
  45
  46 /* Fake a uuidgen() syscall */
  47 int uuidgen(struct uuid *store, int count)
  48 {
  49         int rfd;
  50
  51         if((rfd = open(_PATH_RANDOM, O_RDONLY)) < 0) {
  52                 return -1;
  53         }
  54
  55         while(count--) {
  56                 if(read(rfd, store++, sizeof(*store)) < sizeof(*store)) {
  57                         close(rfd);
  58                         return -1;
  59                 }
  60         }
  61
  62         close(rfd);
  63
  64         return 0;
  65 }
  66 #endif /* defined(__minix) */
  67
  68 /*
  69  * uuid_create() - create an UUID.
  70  * See also:
  71  *      http://www.opengroup.org/onlinepubs/009629399/uuid_create.htm
  72  */
  73 void
  74 uuid_create(uuid_t *u, uint32_t *status)
  75 {
  76         uint32_t s;
  77
  78         if (uuidgen(u, 1) == -1)
  79                 s = uuid_s_no_memory;   /* XXX */
  80         else
  81                 s = uuid_s_ok;
  82
  83         if (status)
  84                 *status = s;
  85 }