Add opendisk from NetBSD.

Add OpenBSD tags to files

1 files changed, 96 insertions, 0 deletions

diff --git a/lib/libutil/opendisk.c b/lib/libutil/opendisk.c
new file mode 100644
index 00000000000..7afe2422427
--- /dev/null
+++ b/lib/libutil/opendisk.c
@@ -0,0 +1,96 @@
+/*	$OpenBSD: opendisk.c,v 1.1 1999/09/21 04:52:45 csapuntz 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 <util.h>
+#include <paths.h>
+#include <stdio.h>
+#include <string.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);
+}