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144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/* $NetBSD: devopen.c,v 1.2 2014/08/10 07:40:49 isaki Exp $ */
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/*-
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* Copyright (c) 1993 John Brezak
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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#define ispart(c) ((c) >= 'a' && (c) <= 'h')
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int devlookup(char *);
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int devparse(const char *, int *, int *, int *, int *, int *, char **);
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int
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devlookup(char *d)
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{
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struct devsw *dp = devsw;
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int i;
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for (i = 0; i < ndevs; i++, dp++)
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if (dp->dv_name && strcmp(dp->dv_name, d) == 0)
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return (i);
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printf("No such device - Configured devices are:\n");
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for (dp = devsw, i = 0; i < ndevs; i++, dp++)
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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 (-1);
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}
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/*
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* Parse a device spec in one of two forms.
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* dev(ctlr, unit, part)file
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*/
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int
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devparse(const char *fname, int *dev, int *adapt, int *ctlr, int *unit,
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int *part, char **file)
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{
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int argc, flag;
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char *s, *args[3];
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extern char nametmp[];
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/* get device name and make lower case */
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strcpy(nametmp, (char *)fname);
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for (s = nametmp; *s && *s != '('; s++)
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if (isupper(*s)) *s = tolower(*s);
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if (*s == '(') {
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/* lookup device and get index */
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*s = NULL;
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if ((*dev = devlookup(nametmp)) < 0)
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goto baddev;
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/* tokenize device ident */
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for (++s, flag = 0, argc = 0; *s && *s != ')'; s++) {
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if (*s != ',') {
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if (!flag) {
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flag++;
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args[argc++] = s;
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}
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} else {
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if (flag) {
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*s = NULL;
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flag = 0;
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}
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}
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}
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if (*s == ')')
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*s = NULL;
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switch (argc) {
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case 3:
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*part = atoi(args[2]);
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/* FALL THROUGH */
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case 2:
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*unit = atoi(args[1]);
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/* FALL THROUGH */
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case 1:
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*ctlr = atoi(args[0]);
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break;
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}
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*file = ++s;
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} else {
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/* no device present */
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*file = (char *)fname;
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}
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return (0);
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baddev:
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return (EINVAL);
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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 = 0, ctlr = 0, unit = 0, part = 0;
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int adapt = 0;
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struct devsw *dp = &devsw[0];
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if ((error =
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devparse(fname, &dev, &adapt, &ctlr, &unit, &part, file)) != 0)
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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, ctlr, unit, part)) == 0)
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return (0);
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printf("%s(%d,%d,%d): %s\n", devsw[dev].dv_name,
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ctlr, unit, part, strerror(error));
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return (error);
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}
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