1 /* $NetBSD: devopen.c,v 1.3 2005/12/11 12:16:41 christos 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 {
47 int error;
48 char namebuf[128];
49 char devtype[16];
50 const char *cp;
51 char *ncp;
52 #if !defined(LIBSA_SINGLE_DEVICE)
53 int i;
54 struct devsw *dp;
55 #endif
56
57 cp = fname;
58 ncp = (char *)fname;
59
60 #ifdef arc
61 /*
62 * Look for "fdisk" (floppy disk?) or "rdisk" (rigid disk?) strings
63 * in OSLOADPARTITION like the following:
64 * 'scsi(0)disk(0)rdisk()partition(2)netbsd' (jazzio scsi disk)
65 * 'scsi(1)cdrom(1)fdisk()netbsd.arc' (jazzio scsi cdrom)
66 * 'multi(0)disk(0)fdisk()netbsd' (floppy disk)
67 * 'eisa(0)scsi(0)disk(0)rdisk()partition(2)netbsd' (eisa raid)
68 * etc. (the file can either be a relative path or an abosolute path).
69 */
70 for (;;) {
71 if (strncmp(cp, "rdisk", 5) == 0 ||
72 strncmp(cp, "fdisk", 5) == 0) {
73 strcpy(devtype, "disk");
74 break;
75 }
76 while (*ncp && *ncp++ != ')')
77 ;
78 if (*ncp)
79 cp = ncp;
80 else
81 return ENXIO;
82 }
83 #endif
84 #ifdef sgimips
85 /*
86 * If device starts with a PCI bus specifier, skip past it so the
87 * device-matching code below gets the actual device type. Leave
88 * fname as is, since it'll be passed back to ARCS to open the
89 * device. This is necessary for the IP32.
90 */
91 if (strncmp(cp, "pci", 3) == 0) {
92 while (*ncp && *ncp++ != ')')
93 ;
94 if (*ncp)
95 cp = ncp;
96 }
97
98 /*
99 * Look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd'
100 * or 'dksc(0,0,0)/netbsd' (the file can either be a relative path
101 * or an abosolute path).
102 */
103 if (strncmp(cp, "scsi", 4) == 0) {
104 strcpy(devtype, "disk");
105 } else if (strncmp(cp, "dksc", 4) == 0) {
106 strcpy(devtype, "disk");
107 } else
108 return ENXIO;
109 #endif
110
111 while (ncp != NULL && *ncp != 0) {
112 while (*ncp && *ncp++ != ')')
113 ;
114 if (*ncp)
115 cp = ncp;
116 }
117
118 strncpy(namebuf, fname, sizeof(namebuf));
119 namebuf[cp - fname] = 0;
120
121 printf("devopen: %s type %s file %s\n", namebuf, devtype, cp);
122 #ifdef LIBSA_SINGLE_DEVICE
123 error = DEV_OPEN(dp)(f, fname);
124 #else /* !LIBSA_SINGLE_DEVICE */
125 for (dp = devsw, i = 0; i < ndevs; dp++, i++)
126 if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0)
127 goto found;
128 printf("Unknown device '%s'\nKnown devices are:", devtype);
129 for (dp = devsw, i = 0; i < ndevs; dp++, i++)
130 if (dp->dv_name)
131 printf(" %s", dp->dv_name);
132 printf("\n");
133 return ENXIO;
134
135 found:
136 error = (dp->dv_open)(f, namebuf);
137 #endif /* !LIBSA_SINGLE_DEVICE */
138 if (error)
139 return error;
140
141 #ifndef LIBSA_SINGLE_DEVICE
142 f->f_dev = dp;
143 #endif
144 if (file && *cp != '\0')
145 *file = (char *)cp; /* XXX */
146 return 0;
147 }
148