96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
/* $NetBSD: opendisk.c,v 1.7 2000/07/05 11:46:41 ad 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>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
__RCSID("$NetBSD: opendisk.c,v 1.7 2000/07/05 11:46:41 ad Exp $");
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <util.h>
|
|
#include <paths.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
int
|
|
opendisk(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);
|
|
}
|