Annotation of sys/arch/alpha/stand/boot/devopen.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: devopen.c,v 1.8 2003/06/02 23:27:44 millert Exp $ */
2: /* $NetBSD: devopen.c,v 1.1 1995/11/23 02:39:37 cgd Exp $ */
3:
4: /*-
5: * Copyright (c) 1992, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Ralph Campbell.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)devopen.c 8.1 (Berkeley) 6/10/93
36: */
37:
38: #include <lib/libsa/stand.h>
39:
40: /*
41: * Decode the string 'fname', open the device and return the remaining
42: * file name if any.
43: */
44: devopen(f, fname, file)
45: struct open_file *f;
46: const char *fname;
47: char **file; /* out */
48: {
49: register char *cp;
50: register char *ncp;
51: register struct devsw *dp;
52: register int c, i;
53: int ctlr = 0, unit = 0, part = 0;
54: char namebuf[20];
55: int rc;
56:
57: cp = (char *)fname;
58: ncp = namebuf;
59:
60: /* look for a string like 'disk(0,0,0)bsd' */
61: if (strchr(cp, '(')) {
62: while ((c = *cp) != '\0') {
63: if (c == '(') {
64: cp++;
65: break;
66: }
67: if (ncp < namebuf + sizeof(namebuf) - 1)
68: *ncp++ = c;
69: cp++;
70: }
71:
72: /* get controller number */
73: if ((c = *cp) >= '0' && c <= '9') {
74: ctlr = c - '0';
75: c = *++cp;
76: }
77:
78: if (c == ',') {
79: /* get SCSI device number */
80: if ((c = *++cp) >= '0' && c <= '9') {
81: unit = c - '0';
82: c = *++cp;
83: }
84:
85: if (c == ',') {
86: /* get partition number */
87: if ((c = *++cp) >= '0' && c <= '9') {
88: part = c - '0';
89: c = *++cp;
90: }
91: }
92: }
93: if (c != ')')
94: goto defdev;
95: cp++;
96: *ncp = '\0';
97: } else {
98: defdev:
99: /* No valid device specification */
100: cp = (char *)fname;
101: ncp = namebuf;
102: dp = devsw;
103: ctlr = unit = part = 0;
104: goto fnd;
105: }
106:
107: for (dp = devsw, i = 0; i < ndevs; dp++, i++)
108: if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0)
109: goto fnd;
110: printf("Unknown device '%s'\nKnown devices are:", namebuf);
111: for (dp = devsw, i = 0; i < ndevs; dp++, i++)
112: if (dp->dv_name)
113: printf(" %s", dp->dv_name);
114: printf("\n");
115: return (ENXIO);
116:
117: fnd:
118: rc = (dp->dv_open)(f, ctlr, unit, part);
119: if (rc)
120: return (rc);
121:
122: f->f_dev = dp;
123: if (file && *cp != '\0')
124: *file = cp;
125: return (0);
126: }
CVSweb