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- /* $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);
- }
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