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devopen.c revision 1.2 
      1 /*	$NetBSD: devopen.c,v 1.2 2003/03/17 03:04:51 rafal 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. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)devopen.c	8.1 (Berkeley) 6/10/93
     39  */
     40 
     41 #include <lib/libsa/stand.h>
     42 #include <lib/libkern/libkern.h>
     43 
     44 /*
     45  * Decode the string 'fname', open the device and return the remaining
     46  * file name if any.
     47  */
     48 int
     49 devopen(f, fname, file)
     50 	struct open_file *f;
     51 	const char *fname;
     52 	char **file;	/* out */
     53 {
     54 /*	int ctlr = 0, unit = 0, part = 0; */
     55 	int rc;
     56 	char namebuf[128];
     57 	char devtype[16];
     58 	const char *cp;
     59 	char *ncp;
     60 #if !defined(LIBSA_SINGLE_DEVICE)
     61 	int i;
     62 	struct devsw *dp;
     63 #endif
     64 
     65 	cp = fname;
     66 	ncp = (char *)fname;
     67 
     68 	/*
     69 	 * If device starts with a PCI bus specifier, skip past it so the
     70 	 * device-matching code below gets the actual device type. Leave
     71 	 * fname as is, since it'll be passed back to ARCS to open the
     72 	 * device.  This is necessary for the IP32.
     73 	 */
     74 	if (strncmp(cp, "pci", 3) == 0) {
     75 		while (*ncp && *ncp++ != ')')
     76 			;
     77 		if (*ncp)
     78 			cp = ncp;
     79 	}
     80 
     81 	/*
     82 	 * Look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd'
     83 	 * or 'dksc(0,0,0)/netbsd' (the file can either be a relative path
     84 	 * or an abosolute path).
     85 	 */
     86 	if (strncmp(cp, "scsi", 4) == 0) {
     87 		strcpy(devtype, "scsi");
     88 	} else if (strncmp(cp, "dksc", 4) == 0) {
     89 		strcpy(devtype, "dksi");
     90 	} else {
     91 		return ENXIO;
     92 	}
     93 
     94 	while (ncp != NULL && *ncp != 0) {
     95 		while (*ncp && *ncp++ != ')')
     96 			;
     97 		if (*ncp)
     98 			cp = ncp;
     99 	}
    100 
    101 	strncpy(namebuf, fname, sizeof(namebuf));
    102 	namebuf[cp - fname] = 0;
    103 
    104 	printf("devopen: %s type %s file %s\n", namebuf, devtype, cp);
    105 #ifdef LIBSA_SINGLE_DEVICE
    106 	rc = DEV_OPEN(dp)(f, fname);
    107 #else /* !LIBSA_SINGLE_DEVICE */
    108 	for (dp = devsw, i = 0; i < ndevs; dp++, i++)
    109 		if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0)
    110 			goto fnd;
    111 	printf("Unknown device '%s'\nKnown devices are:", devtype);
    112 	for (dp = devsw, i = 0; i < ndevs; dp++, i++)
    113 		if (dp->dv_name)
    114 			printf(" %s", dp->dv_name);
    115 	printf("\n");
    116 	return ENXIO;
    117 
    118 fnd:
    119 	rc = (dp->dv_open)(f, namebuf);
    120 #endif /* !LIBSA_SINGLE_DEVICE */
    121 	if (rc)
    122 		return rc;
    123 
    124 #ifndef LIBSA_SINGLE_DEVICE
    125 	f->f_dev = dp;
    126 #endif
    127 	if (file && *cp != '\0')
    128 		*file = (char *)cp;	/* XXX */
    129 	return 0;
    130 }
    131