108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/* $NetBSD: devopen.c,v 1.2 2001/09/29 03:50:13 minoura Exp $ */
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/*
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* Copyright (c) 2001 Minoura Makoto
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <sys/param.h>
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#include <sys/disklabel.h>
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#include <lib/libkern/libkern.h>
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#include <lib/libsa/stand.h>
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#include "libx68k.h"
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extern struct devspec devspec[]; /* defined in conf.c */
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int devopen_open_dir = 0;
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/*
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* Parse a device spec.
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*
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* sd<unit><part>:<file>
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* unit - 0-7
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* part - a-p
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*/
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int
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devparse(const char *fname, int *dev, int *unit, int *part, char **file)
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{
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char const *s;
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int i;
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s = fname;
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for (i = 0; devspec[i].ds_name != 0; i++) {
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if (strncmp (devspec[i].ds_name, s,
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strlen(devspec[i].ds_name)) == 0)
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break;
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}
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if (devspec[i].ds_name == 0)
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return (ENODEV);
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s += strlen(devspec[i].ds_name);
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*dev = devspec[i].ds_dev;
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*unit = *s++ - '0';
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if (*unit < 0 || *unit > devspec[i].ds_maxunit)
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/* bad unit */
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return (ENODEV);
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*part = *s++ - 'a';
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if (*part < 0 || *part > MAXPARTITIONS)
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/* bad partition */
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return (ENODEV);
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if (*s++ != ':')
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return (ENODEV);
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if (*s == '/') {
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s++;
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if (devopen_open_dir && *s == 0)
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s--;
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}
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(const char*) *file = s;
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return 0;
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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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int dev, unit, part;
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struct devsw *dp = &devsw[0];
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error = devparse(fname, &dev, &unit, &part, file);
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if (error)
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return(error);
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dp = &devsw[dev];
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if (!dp->dv_open)
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return(ENODEV);
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f->f_dev = dp;
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if ((error = (*dp->dv_open)(f, unit, part)) == 0)
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return(0);
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return(error);
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}
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