148 lines
4.3 KiB
C
148 lines
4.3 KiB
C
/* $NetBSD: devopen.c,v 1.3 2005/12/11 12:16:41 christos Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)devopen.c 8.1 (Berkeley) 6/10/93
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*/
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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/*
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* Decode the string 'fname', open the device and return the remaining
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* file name if any.
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*/
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int
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devopen(struct open_file *f, const char *fname, char **file)
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{
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int error;
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char namebuf[128];
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char devtype[16];
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const char *cp;
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char *ncp;
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#if !defined(LIBSA_SINGLE_DEVICE)
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int i;
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struct devsw *dp;
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#endif
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cp = fname;
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ncp = (char *)fname;
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#ifdef arc
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/*
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* Look for "fdisk" (floppy disk?) or "rdisk" (rigid disk?) strings
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* in OSLOADPARTITION like the following:
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* 'scsi(0)disk(0)rdisk()partition(2)netbsd' (jazzio scsi disk)
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* 'scsi(1)cdrom(1)fdisk()netbsd.arc' (jazzio scsi cdrom)
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* 'multi(0)disk(0)fdisk()netbsd' (floppy disk)
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* 'eisa(0)scsi(0)disk(0)rdisk()partition(2)netbsd' (eisa raid)
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* etc. (the file can either be a relative path or an abosolute path).
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*/
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for (;;) {
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if (strncmp(cp, "rdisk", 5) == 0 ||
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strncmp(cp, "fdisk", 5) == 0) {
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strcpy(devtype, "disk");
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break;
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}
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while (*ncp && *ncp++ != ')')
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;
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if (*ncp)
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cp = ncp;
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else
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return ENXIO;
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}
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#endif
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#ifdef sgimips
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/*
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* If device starts with a PCI bus specifier, skip past it so the
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* device-matching code below gets the actual device type. Leave
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* fname as is, since it'll be passed back to ARCS to open the
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* device. This is necessary for the IP32.
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*/
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if (strncmp(cp, "pci", 3) == 0) {
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while (*ncp && *ncp++ != ')')
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;
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if (*ncp)
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cp = ncp;
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}
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/*
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* Look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd'
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* or 'dksc(0,0,0)/netbsd' (the file can either be a relative path
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* or an abosolute path).
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*/
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if (strncmp(cp, "scsi", 4) == 0) {
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strcpy(devtype, "disk");
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} else if (strncmp(cp, "dksc", 4) == 0) {
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strcpy(devtype, "disk");
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} else
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return ENXIO;
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#endif
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while (ncp != NULL && *ncp != 0) {
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while (*ncp && *ncp++ != ')')
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;
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if (*ncp)
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cp = ncp;
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}
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strncpy(namebuf, fname, sizeof(namebuf));
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namebuf[cp - fname] = 0;
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printf("devopen: %s type %s file %s\n", namebuf, devtype, cp);
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#ifdef LIBSA_SINGLE_DEVICE
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error = DEV_OPEN(dp)(f, fname);
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#else /* !LIBSA_SINGLE_DEVICE */
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for (dp = devsw, i = 0; i < ndevs; dp++, i++)
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if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0)
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goto found;
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printf("Unknown device '%s'\nKnown devices are:", devtype);
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for (dp = devsw, i = 0; i < ndevs; dp++, i++)
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if (dp->dv_name)
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printf(" %s", dp->dv_name);
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printf("\n");
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return ENXIO;
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found:
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error = (dp->dv_open)(f, namebuf);
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#endif /* !LIBSA_SINGLE_DEVICE */
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if (error)
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return error;
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#ifndef LIBSA_SINGLE_DEVICE
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f->f_dev = dp;
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#endif
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if (file && *cp != '\0')
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*file = (char *)cp; /* XXX */
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return 0;
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}
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