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/* $OpenBSD: opendisk.c,v 1.2 2001/08/16 18:34:40 millert 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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/cdefs.h>
#include <sys/param.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <string.h>
#include "util.h"
int
opendisk(path, flags, buf, buflen, iscooked)
const char *path;
int flags;
char *buf;
size_t buflen;
int iscooked;
{
int f, rawpart;
if (buf == NULL) {
errno = EFAULT;
return (-1);
}
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);
}
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