Moved from lib/devopen.c,v
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simonb
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1a4a126f90
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/* $NetBSD: devopen.c,v 1.12 1999/11/27 03:08:47 simonb 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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 <stand.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(f, fname, file)
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struct open_file *f;
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const char *fname;
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char **file; /* out */
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{
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register const char *cp;
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register char *ncp;
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register struct devsw *dp;
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register int c, i;
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int ctlr = 0, unit = 0, part = 0;
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char namebuf[20];
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int rc;
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cp = fname;
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ncp = namebuf;
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/* look for a string like '5/rz0/netbsd' or '5/rz3f/netbsd */
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if ((c = *cp) >= '0' && c <= '9') {
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ctlr = c - '0';
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/* skip the '/' */
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if (*++cp != '/')
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return (ENXIO);
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cp++;
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while ((c = *cp) != '\0') {
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if (c == '/')
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break;
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if (c >= '0' && c <= '9') {
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/* read unit number */
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unit = c - '0';
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/* look for a partition */
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if ((c = *++cp) >= 'a' && c <= 'h') {
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part = c - 'a';
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c = *++cp;
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}
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if (c != '/')
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return (ENXIO);
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break;
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}
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if (ncp < namebuf + sizeof(namebuf) - 1)
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*ncp++ = c;
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cp++;
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}
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} else {
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/* expect a string like 'rz(0,0,0)netbsd' */
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while ((c = *cp) != '\0') {
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if (c == '(') {
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cp++;
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break;
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}
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if (ncp < namebuf + sizeof(namebuf) - 1)
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*ncp++ = c;
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cp++;
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}
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/* get controller number */
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if ((c = *cp) >= '0' && c <= '9') {
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ctlr = c - '0';
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c = *++cp;
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}
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if (c == ',') {
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/* get SCSI device number */
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if ((c = *++cp) >= '0' && c <= '9') {
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unit = c - '0';
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c = *++cp;
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}
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if (c == ',') {
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/* get partition number */
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if ((c = *++cp) >= '0' && c <= '9') {
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part = c - '0';
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c = *++cp;
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}
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}
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}
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if (c != ')')
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return (ENXIO);
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cp++;
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}
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*ncp = '\0';
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#ifdef LIBSA_SINGLE_DEVICE
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rc = DEV_OPEN(dp)(f, ctlr, unit, part);
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#else
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#ifdef BOOTRZ /* First stage disk boot loader only knows rz devices */
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if (strcmp (namebuf, "rz")) {
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printf ("Unknown device: %s\n", namebuf);
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return ENXIO;
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}
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dp = devsw;
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i = 0;
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#else
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for (dp = devsw, i = 0; i < ndevs; dp++, i++)
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if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0)
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goto fnd;
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printf("Unknown device '%s'\nKnown devices are:", namebuf);
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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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fnd:
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#endif
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rc = (dp->dv_open)(f, ctlr, unit, part);
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#endif
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if (rc)
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return (rc);
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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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