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devopen.c revision 1.1.2.2 
      1 /*	$NetBSD: devopen.c,v 1.1.2.2 2002/01/10 19:48:35 thorpej 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 	 * look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd'
     70 	 * or 'dksc(0,0,0)netbsd'
     71 	 */
     72 	if (cp[0] == 's' && cp[1] == 'c' && cp[2] == 's' && cp[3] == 'i') {
     73 		strcpy(devtype, "scsi");
     74 	} else if (cp[0] == 'd' && cp[1] == 'k' && cp[2] == 's' && cp[3] == 'c') {
     75 		strcpy(devtype, "dksi");
     76 	} else
     77 		return (ENXIO);
     78 	while (ncp != NULL && *ncp != 0) {
     79 		while (*ncp && *ncp++ != ')')
     80 			;
     81 		if (*ncp)
     82 			cp = ncp;
     83 	}
     84 	strncpy(namebuf, fname, sizeof(namebuf));
     85 	namebuf[cp - fname] = 0;
     86 
     87 	printf("devopen: %s type %s file %s\n", namebuf, devtype, cp);
     88 #ifdef LIBSA_SINGLE_DEVICE
     89 	rc = DEV_OPEN(dp)(f, fname);
     90 #else /* !LIBSA_SINGLE_DEVICE */
     91 	for (dp = devsw, i = 0; i < ndevs; dp++, i++)
     92 		if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0)
     93 			goto fnd;
     94 	printf("Unknown device '%s'\nKnown devices are:", devtype);
     95 	for (dp = devsw, i = 0; i < ndevs; dp++, i++)
     96 		if (dp->dv_name)
     97 			printf(" %s", dp->dv_name);
     98 	printf("\n");
     99 	return (ENXIO);
    100 
    101 fnd:
    102 	rc = (dp->dv_open)(f, namebuf);
    103 #endif /* !LIBSA_SINGLE_DEVICE */
    104 	if (rc)
    105 		return (rc);
    106 
    107 #ifndef LIBSA_SINGLE_DEVICE
    108 	f->f_dev = dp;
    109 #endif
    110 	if (file && *cp != '\0')
    111 		*file = (char *)cp;	/* XXX */
    112 	return (0);
    113 }
    114