1/*	$NetBSD: devopen.c,v 1.2.10.1 2005/11/10 13:55:09 skrll 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 */
44int
45devopen(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