1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1991-1994, by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/promif.h>
30#include <sys/promimpl.h>
31
32int
33prom_devname_from_pathname(register char *pathname, register char *buffer)
34{
35	register char *p;
36
37	if ((pathname == (char *)0) || (*pathname == (char)0))
38		return (-1);
39
40	p = prom_strrchr(pathname, '/');
41	if (p == 0)
42		return (-1);
43
44	p++;
45	while (*p != 0)  {
46		*buffer++ = *p++;
47		if ((*p == '@') || (*p == ':'))
48			break;
49	}
50	*buffer = (char)0;
51
52	return (0);
53}
54
55/*
56 * Get base device name of stdin/stdout device into callers buffer.
57 * Return 0 if successful; -1 otherwise.
58 */
59
60int
61prom_stdin_devname(char *buffer)
62{
63	return (prom_devname_from_pathname(prom_stdinpath(), buffer));
64}
65
66int
67prom_stdout_devname(char *buffer)
68{
69	return (prom_devname_from_pathname(prom_stdoutpath(), buffer));
70}
71
72/*
73 * Return 1 if stdin/stdout are on the same device and subdevice.
74 * Return 0, otherwise.
75 */
76
77int
78prom_stdin_stdout_equivalence(void)
79{
80	register char *s, *p;
81
82	s = prom_stdinpath();
83	p = prom_stdoutpath();
84
85	if ((s != (char *)0) && (p != (char *)0))  {
86		return (prom_strcmp(s, p) == 0 ? 1:0);
87	}
88
89	return (0);
90}
91
92/*
93 *	This just returns a pointer to the option's part of the
94 *	last part of the string.  Useful for determining which is
95 *	the boot partition, tape file or channel of the DUART.
96 */
97char *
98prom_path_options(register char *path)
99{
100	register char *p, *s;
101
102	s = prom_strrchr(path, '/');
103	if (s == (char *)0)
104		return ((char *)0);
105	p = prom_strrchr(s, ':');
106	if (p == (char *)0)
107		return ((char *)0);
108	return (p+1);
109}
110