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
32 int
prom_devname_from_pathname(register char * pathname,register char * buffer)33 prom_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
60 int
prom_stdin_devname(char * buffer)61 prom_stdin_devname(char *buffer)
62 {
63 return (prom_devname_from_pathname(prom_stdinpath(), buffer));
64 }
65
66 int
prom_stdout_devname(char * buffer)67 prom_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
77 int
prom_stdin_stdout_equivalence(void)78 prom_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 */
97 char *
prom_path_options(register char * path)98 prom_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