/*-
* 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. 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
*/
/*
* Decode the string 'fname', open the device and return the remaining
* file name if any.
*/
int
devopen(struct open_file *f,
const char *fname,
char **file) /* out */
{
int ctlr = 0, unit = 0, part = 0;
int c, rc;
char device_name[20];
const char *cp;
char *ncp;
#if !defined(LIBSA_SINGLE_DEVICE)
int i;
struct devsw *dp;
#endif
cp = fname;
ncp = device_name;
/*
* Require the form CTRL/DEVNAME(UNIT,PART)/FILENAME
* e.g. '0/ace(0,0)/netbsd' '0/tftp(0,0)/netbsd'
*/
/* get controller number */
c = *cp++;
if (c < '0' || c > '9')
return ENXIO;
ctlr = c - '0';
c = *cp++;
if (c != '/')
return ENXIO;
/* get device name */
while ((c = *cp) != '\0') {
if ((c == '(') || (c == '/')) {
cp++;
break;
}
if (ncp < device_name + sizeof(device_name) - 1)
*ncp++ = c;
cp++;
}
if (ncp == device_name)
return ENXIO;
/* get device number */
c = *cp++;
if (c < '0' || c > '9')
return ENXIO;
unit = c - '0';
c = *cp++;
if (c != ',')
return (ENXIO);
/* get partition number */
c = *cp++;
if (c < '0' || c > '9')
return ENXIO;
part = c - '0';
c = *cp++;
if (c != ')')
return ENXIO;
*ncp = '\0';
#ifdef LIBSA_SINGLE_DEVICE
rc = DEV_OPEN(dp)(f, ctlr, unit, part);
#else /* !LIBSA_SINGLE_DEVICE */
for (dp = devsw, i = 0; i < ndevs; dp++, i++)
if (dp->dv_name && strcmp(device_name, dp->dv_name) == 0)
goto fnd;
printf("Unknown device '%s'\nKnown devices are:", device_name);
for (dp = devsw, i = 0; i < ndevs; dp++, i++)
if (dp->dv_name)
printf(" %s", dp->dv_name);
printf("\n");
return ENXIO;
