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      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
     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