1 /* $NetBSD: devopen.c,v 1.17 2009/03/14 21:04:14 dsl Exp $ */
2
3 /*-
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ralph Campbell.
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. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)devopen.c 8.1 (Berkeley) 6/10/93
35 */
36
37 #include <lib/libsa/stand.h>
38 #include <lib/libkern/libkern.h>
39
40 /*
41 * Decode the string 'fname', open the device and return the remaining
42 * file name if any.
43 */
44 int
devopen(struct open_file * f,const char * fname,char ** file)45 devopen(struct open_file *f, const char *fname, char **file)
46 /* file: out */
47 {
48 int ctlr = 0, unit = 0, part = 0;
49 int c, rc;
50 char namebuf[20];
51 const char *cp;
52 char *ncp;
53 #if !defined(LIBSA_SINGLE_DEVICE)
54 int i;
55 struct devsw *dp;
56 #endif
57
58 cp = fname;
59 ncp = namebuf;
60
61 /*
62 * look for a string like '5/rz0/netbsd' or '5/rz3f/netbsd
63 * or 3/tftp/netbsd
64 */
65 if ((c = *cp) >= '0' && c <= '9') {
66 ctlr = c - '0';
67 /* skip the '/' */
68 if (*++cp != '/')
69 return (ENXIO);
70 cp++;
71 while ((c = *cp) != '\0') {
72 if (c == '/')
73 break;
74 if (c >= '0' && c <= '9') {
75 /* read unit number */
76 unit = c - '0';
77
78 /* look for a partition */
79 if ((c = *++cp) >= 'a' && c <= 'h') {
80 part = c - 'a';
81 c = *++cp;
82 }
83 if (c != '/')
84 return (ENXIO);
85 cp++;
86 break;
87 }
88 if (ncp < namebuf + sizeof(namebuf) - 1)
89 *ncp++ = c;
90 cp++;
91 }
92 } else {
93 /* expect a string like 'rz(0,0,0)netbsd' */
94 while ((c = *cp) != '\0') {
95 if (c == '(') {
96 cp++;
97 break;
98 }
99 if (ncp < namebuf + sizeof(namebuf) - 1)
100 *ncp++ = c;
101 cp++;
102 }
103
104 /* get controller number */
105 if ((c = *cp) >= '0' && c <= '9') {
106 ctlr = c - '0';
107 c = *++cp;
108 }
109
110 if (c == ',') {
111 /* get SCSI device number */
112 if ((c = *++cp) >= '0' && c <= '9') {
113 unit = c - '0';
114 c = *++cp;
115 }
116
117 if (c == ',') {
118 /* get partition number */
119 if ((c = *++cp) >= '0' && c <= '9') {
120 part = c - '0';
121 c = *++cp;
122 }
123 }
124 }
125 if (c != ')')
126 return (ENXIO);
127 cp++;
128 }
129 *ncp = '\0';
130
131 #ifdef LIBSA_SINGLE_DEVICE
132 rc = DEV_OPEN(dp)(f, ctlr, unit, part);
133 #else /* !LIBSA_SINGLE_DEVICE */
134 for (dp = devsw, i = 0; i < ndevs; dp++, i++)
135 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0)
136 goto fnd;
137 printf("Unknown device '%s'\nKnown devices are:", namebuf);
138 for (dp = devsw, i = 0; i < ndevs; dp++, i++)
139 if (dp->dv_name)
140 printf(" %s", dp->dv_name);
141 printf("\n");
142 return (ENXIO);
143
144 fnd:
145 #ifdef BOOTNET
146 if (strcmp(namebuf, "tftp") == 0)
147 rc = (dp->dv_open)(f, namebuf);
148 else
149 #endif /* BOOTNET */
150 rc = (dp->dv_open)(f, ctlr, unit, part);
151 #endif /* !LIBSA_SINGLE_DEVICE */
152 if (rc)
153 return (rc);
154
155 #ifndef LIBSA_SINGLE_DEVICE
156 f->f_dev = dp;
157 #endif
158 if (file && *cp != '\0')
159 *file = (char *)cp; /* XXX */
160 return (0);
161 }
162