IABSD.fr/src/lib/libutil/opendisk.c

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• Author : deraadt
  Date : 2014-06-30 00:26:22
  Hash : 429b3653
  Message : sys/types.h rather than sys/param.h, where applicable. avoid overreach.

• lib/libutil/opendisk.c

• /*	$OpenBSD: opendisk.c,v 1.7 2014/06/30 00:26:22 deraadt Exp $	*/
  /*	$NetBSD: opendisk.c,v 1.4 1997/09/30 17:13:50 phil Exp $	*/
  
  /*-
   * Copyright (c) 1997 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * This code is derived from software contributed to The NetBSD Foundation
   * by Luke Mewburn.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <sys/types.h>
  
  #include <errno.h>
  #include <fcntl.h>
  #include <paths.h>
  #include <stdio.h>
  #include <string.h>
  
  #include "util.h"
  
  int
  opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked)
  {
  	int f, rawpart;
  
  	snprintf(buf, buflen, "%s", path);
  
  	if ((flags & O_CREAT) != 0) {
  		errno = EINVAL;
  		return (-1);
  	}
  
  	rawpart = getrawpartition();
  	if (rawpart < 0)
  		return (-1);	/* sysctl(3) in getrawpartition sets errno */
  
  	f = open(buf, flags);
  	if (f != -1 || errno != ENOENT)
  		return (f);
  
  	snprintf(buf, buflen, "%s%c", path, 'a' + rawpart);
  	f = open(buf, flags);
  	if (f != -1 || errno != ENOENT)
  		return (f);
  
  	if (strchr(path, '/') != NULL)
  		return (-1);
  
  	snprintf(buf, buflen, "%s%s%s", _PATH_DEV, iscooked ? "" : "r", path);
  	f = open(buf, flags);
  	if (f != -1 || errno != ENOENT)
  		return (f);
  
  	snprintf(buf, buflen, "%s%s%s%c", _PATH_DEV, iscooked ? "" : "r", path,
  	    'a' + rawpart);
  	f = open(buf, flags);
  	return (f);
  }