1 /* $NetBSD: bootconfig.c,v 1.2 2002/03/10 19:56:39 lukem Exp $ */
2
3 /*-
4 * Copyright (c) 1994-1998 Mark Brinicombe.
5 * Copyright (c) 1994 Brini.
6 * All rights reserved.
7 *
8 * This code is derived from software written for Brini by Mark Brinicombe
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Mark Brinicombe
21 * for the NetBSD Project.
22 * 4. The name of the company nor the name of the author may be used to
23 * endorse or promote products derived from this software without specific
24 * prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
41
42 #include <sys/param.h>
43
44 #include <sys/systm.h>
45
46 #include <machine/bootconfig.h>
47
48
49 /*
50 * Function to identify and process different types of boot argument
51 */
52
53 int
54 get_bootconf_option(opts, opt, type, result)
55 char *opts;
56 char *opt;
57 int type;
58 void *result;
59 {
60 char *ptr;
61 char *optstart;
62 int not;
63
64 ptr = opts;
65
66 while (*ptr) {
67 /* Find start of option */
68 while (*ptr == ' ' || *ptr == '\t')
69 ++ptr;
70
71 if (*ptr == 0)
72 break;
73
74 not = 0;
75
76 /* Is it a negate option */
77 if ((type & BOOTOPT_TYPE_MASK) == BOOTOPT_TYPE_BOOLEAN && *ptr == '!') {
78 not = 1;
79 ++ptr;
80 }
81
82 /* Find the end of option */
83 optstart = ptr;
84 while (*ptr != 0 && *ptr != ' ' && *ptr != '\t' && *ptr != '=')
85 ++ptr;
86
87 if ((*ptr == '=')
88 || (*ptr != '=' && ((type & BOOTOPT_TYPE_MASK) == BOOTOPT_TYPE_BOOLEAN))) {
89 /* compare the option */
90 if (strncmp(optstart, opt, (ptr - optstart)) == 0) {
91 /* found */
92
93 if (*ptr == '=')
94 ++ptr;
95
96 switch(type & BOOTOPT_TYPE_MASK) {
97 case BOOTOPT_TYPE_BOOLEAN :
98 if (*(ptr - 1) == '=')
99 *((int *)result) = ((u_int)strtoul(ptr, NULL, 10) != 0);
100 else
101 *((int *)result) = !not;
102 break;
103 case BOOTOPT_TYPE_STRING :
104 *((char **)result) = ptr;
105 break;
106 case BOOTOPT_TYPE_INT :
107 *((int *)result) = (u_int)strtoul(ptr, NULL, 10);
108 break;
109 case BOOTOPT_TYPE_BININT :
110 *((int *)result) = (u_int)strtoul(ptr, NULL, 2);
111 break;
112 case BOOTOPT_TYPE_HEXINT :
113 *((int *)result) = (u_int)strtoul(ptr, NULL, 16);
114 break;
115 default:
116 return(0);
117 }
118 return(1);
119 }
120 }
121 /* skip to next option */
122 while (*ptr != ' ' && *ptr != '\t' && *ptr != 0)
123 ++ptr;
124 }
125 return(0);
126 }
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