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devopen.c revision 1.3 
      1 /*	$NetBSD: devopen.c,v 1.3 2003/08/07 16:29:27 agc 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(f, fname, file)
     46 	struct open_file *f;
     47 	const char *fname;
     48 	char **file;	/* out */
     49 {
     50 /*	int ctlr = 0, unit = 0, part = 0; */
     51 	int rc;
     52 	char namebuf[128];
     53 	char devtype[16];
     54 	const char *cp;
     55 	char *ncp;
     56 #if !defined(LIBSA_SINGLE_DEVICE)
     57 	int i;
     58 	struct devsw *dp;
     59 #endif
     60 
     61 	cp = fname;
     62 	ncp = (char *)fname;
     63 
     64 	/*
     65 	 * If device starts with a PCI bus specifier, skip past it so the
     66 	 * device-matching code below gets the actual device type. Leave
     67 	 * fname as is, since it'll be passed back to ARCS to open the
     68 	 * device.  This is necessary for the IP32.
     69 	 */
     70 	if (strncmp(cp, "pci", 3) == 0) {
     71 		while (*ncp && *ncp++ != ')')
     72 			;
     73 		if (*ncp)
     74 			cp = ncp;
     75 	}
     76 
     77 	/*
     78 	 * Look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd'
     79 	 * or 'dksc(0,0,0)/netbsd' (the file can either be a relative path
     80 	 * or an abosolute path).
     81 	 */
     82 	if (strncmp(cp, "scsi", 4) == 0) {
     83 		strcpy(devtype, "scsi");
     84 	} else if (strncmp(cp, "dksc", 4) == 0) {
     85 		strcpy(devtype, "dksi");
     86 	} else {
     87 		return ENXIO;
     88 	}
     89 
     90 	while (ncp != NULL && *ncp != 0) {
     91 		while (*ncp && *ncp++ != ')')
     92 			;
     93 		if (*ncp)
     94 			cp = ncp;
     95 	}
     96 
     97 	strncpy(namebuf, fname, sizeof(namebuf));
     98 	namebuf[cp - fname] = 0;
     99 
    100 	printf("devopen: %s type %s file %s\n", namebuf, devtype, cp);
    101 #ifdef LIBSA_SINGLE_DEVICE
    102 	rc = DEV_OPEN(dp)(f, fname);
    103 #else /* !LIBSA_SINGLE_DEVICE */
    104 	for (dp = devsw, i = 0; i < ndevs; dp++, i++)
    105 		if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0)
    106 			goto fnd;
    107 	printf("Unknown device '%s'\nKnown devices are:", devtype);
    108 	for (dp = devsw, i = 0; i < ndevs; dp++, i++)
    109 		if (dp->dv_name)
    110 			printf(" %s", dp->dv_name);
    111 	printf("\n");
    112 	return ENXIO;
    113 
    114 fnd:
    115 	rc = (dp->dv_open)(f, namebuf);
    116 #endif /* !LIBSA_SINGLE_DEVICE */
    117 	if (rc)
    118 		return rc;
    119 
    120 #ifndef LIBSA_SINGLE_DEVICE
    121 	f->f_dev = dp;
    122 #endif
    123 	if (file && *cp != '\0')
    124 		*file = (char *)cp;	/* XXX */
    125 	return 0;
    126 }
    127