1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/* $NetBSD: devopen.c,v 1.5 1995/01/18 06:53:54 mellon Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)devopen.c 8.1 (Berkeley) 6/10/93
*/
#include <lib/libsa/stand.h>
/*
* Decode the string 'fname', open the device and return the remaining
* file name if any.
*/
devopen(f, fname, file)
struct open_file *f;
const char *fname;
char **file; /* out */
{
register char *cp;
register char *ncp;
register struct devsw *dp;
register int c, i;
int ctlr = 0, unit = 0, part = 0;
char namebuf[20];
int rc;
cp = fname;
ncp = namebuf;
/* expect a string like 'rz(0,0,0)vmunix' */
while ((c = *cp) != '\0') {
if (c == '(') {
cp++;
break;
}
if (ncp < namebuf + sizeof(namebuf) - 1)
*ncp++ = c;
cp++;
}
/* get controller number */
if ((c = *cp) >= '0' && c <= '9') {
ctlr = c - '0';
c = *++cp;
}
if (c == ',') {
/* get SCSI device number */
if ((c = *++cp) >= '0' && c <= '9') {
unit = c - '0';
c = *++cp;
}
if (c == ',') {
/* get partition number */
if ((c = *++cp) >= '0' && c <= '9') {
part = c - '0';
c = *++cp;
}
}
}
if (c != ')')
return (ENXIO);
cp++;
*ncp = '\0';
#ifdef SMALL
if (strcmp (namebuf, "rz")) {
printf ("Unknown device: %s\n", namebuf);
return ENXIO;
}
dp = devsw;
i = 0;
#else
for (dp = devsw, i = 0; i < ndevs; dp++, i++)
if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0)
goto fnd;
printf("Unknown device '%s'\nKnown devices are:", namebuf);
for (dp = devsw, i = 0; i < ndevs; dp++, i++)
if (dp->dv_name)
printf(" %s", dp->dv_name);
printf("\n");
return (ENXIO);
fnd:
#endif
rc = (dp->dv_open)(f, ctlr, unit, part);
if (rc)
return (rc);
f->f_dev = dp;
if (file && *cp != '\0')
*file = cp;
return (0);
}
|
