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/* $NetBSD: devopen.c,v 1.2 1995/02/16 02:33:04 cgd Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)devopen.c 8.1 (Berkeley) 6/10/93
*/
#include <lib/libsa/stand.h>
/*
* Decode the string 'fname', open the device and return the remaining
* file name if any.
*/
devopen(f, fname, file)
struct open_file *f;
const char *fname;
char **file; /* out */
{
register char *cp;
register char *ncp;
register struct devsw *dp;
register int c, i;
int ctlr = 0, unit = 0, part = 0;
char namebuf[20];
int rc;
cp = fname;
ncp = namebuf;
/* look for a string like '5/rz0/vmunix' or '5/rz3f/vmunix */
if ((c = *cp) >= '0' && c <= '9') {
ctlr = c - '0';
/* skip the '/' */
if (*++cp != '/')
return (ENXIO);
cp++;
while ((c = *cp) != '\0') {
if (c == '/')
break;
if (c >= '0' && c <= '9') {
/* read unit number */
unit = c - '0';
/* look for a partition */
if ((c = *++cp) >= 'a' && c <= 'h') {
part = c - 'a';
c = *++cp;
}
if (c != '/')
return (ENXIO);
break;
}
if (ncp < namebuf + sizeof(namebuf) - 1)
*ncp++ = c;
cp++;
}
*ncp = '\0';
/*
* XXX
* pulling strchr from the C library, should pull from libkern.
*/
} else if (strchr(cp, '(')) {
/* expect a string like 'rz(0,0,0)vmunix' */
while ((c = *cp) != '\0') {
if (c == '(') {
cp++;
break;
}
if (ncp < namebuf + sizeof(namebuf) - 1)
*ncp++ = c;
cp++;
}
/* get controller number */
if ((c = *cp) >= '0' && c <= '9') {
ctlr = c - '0';
c = *++cp;
}
if (c == ',') {
/* get SCSI device number */
if ((c = *++cp) >= '0' && c <= '9') {
unit = c - '0';
c = *++cp;
}
if (c == ',') {
/* get partition number */
if ((c = *++cp) >= '0' && c <= '9') {
part = c - '0';
c = *++cp;
}
}
}
if (c != ')')
return (ENXIO);
cp++;
*ncp = '\0';
} else {
dp = devsw;
ctlr = unit = part = 0;
goto fnd;
}
for (dp = devsw, i = 0; i < ndevs; dp++, i++)
if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0)
goto fnd;
printf("Unknown device '%s'\nKnown devices are:", namebuf);
for (dp = devsw, i = 0; i < ndevs; dp++, i++)
if (dp->dv_name)
printf(" %s", dp->dv_name);
printf("\n");
return (ENXIO);
fnd:
rc = (dp->dv_open)(f, ctlr, unit, part);
if (rc)
return (rc);
f->f_dev = dp;
if (file && *cp != '\0')
*file = cp;
return (0);
}
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