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/* $NetBSD: devopen.c,v 1.6 1996/08/02 16:18:39 ragge Exp $ */
/*-
* Copyright (c) 1993 John Brezak
* All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `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 AUTHOR 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.
*
*/
#include <sys/param.h>
#include <sys/reboot.h>
#include "lib/libsa/stand.h"
/* #include "samachdep.h" */
u_int opendev;
#define ispart(c) ((c) >= 'a' && (c) <= 'h')
int
atoi(cp)
char *cp;
{
int val = 0;
while(isdigit(*cp))
val = val * 10 + (*cp++ - '0');
return(val);
}
usage()
{
printf("\
Usage: device(adaptor, controller, drive, partition)file\n\
<device><unit><partitonletter>:file\n\
");
}
devlookup(d,len)
char *d;
int len;
{
struct devsw *dp = devsw;
int i;
for (i = 0; i < ndevs; i++, dp++)
if (dp->dv_name && strncmp(dp->dv_name, d, len) == 0)
return(i);
printf("No such device - Configured devices are:\n");
for (dp = devsw, i = 0; i < ndevs; i++, dp++)
if (dp->dv_name)
printf(" %s", dp->dv_name);
printf("\n");
errno = ENODEV;
return(-1);
}
/*
* Parse a device spec in one of two forms.
*
* dev(adapt, ctlr, unit, part)file
* [A-Za-z]*[0-9]*[A-Za-z]:file
* dev unit part
*/
devparse(fname, dev, adapt, ctlr, unit, part, file)
char *fname;
int *dev, *adapt, *ctlr, *unit, *part;
char **file;
{
int *argp, i;
char *s, *args[4];
/* get device name and make lower case */
for(s = fname; *s && *s != '/' && *s != ':' && *s != '('; s++)
if(isupper(*s))
*s = tolower(*s);
/* first form */
if(*s == '('){
/* lookup device and get index */
if ((*dev = devlookup(fname, s - fname)) < 0)
goto baddev;
/* tokenize device ident */
args[0] = ++s;
for (args[0] = s, i = 1; *s && *s != ')'; s++)
if (*s == ',')
args[i++] = ++s;
switch(i) {
case 4:
*adapt = atoi(args[0]);
*ctlr = atoi(args[1]);
*unit = atoi(args[2]);
*part = atoi(args[3]);
break;
case 3:
*ctlr = atoi(args[0]);
*unit = atoi(args[1]);
*part = atoi(args[2]);
break;
case 2:
*unit = atoi(args[0]);
*part = atoi(args[1]);
break;
case 1:
*part = atoi(args[0]);
break;
case 0:
break;
}
*file = ++s;
/* second form */
} else if (*s == ':') {
/* isolate device */
for(s = fname; *s != ':' && !isdigit(*s); s++)
;
/* lookup device and get index */
if ((*dev = devlookup(fname, s - fname)) < 0)
goto baddev;
/* isolate unit */
if ((*unit = atoi(s)) > sizeof(char))
goto bad;
for (; isdigit(*s); s++)
;
/* translate partition */
if(!ispart(*s))
goto bad;
*part = *s++ - 'a';
if(*s != ':')
goto bad;
*file = ++s;
/* no device present */
} else
*file = fname;
/* return the remaining unparsed part as the file to boot */
return(0);
bad:
usage();
baddev:
return(-1);
}
extern int bootdev;
devopen(f, fname, file)
struct open_file *f;
const char *fname;
char **file;
{
int n, error;
int dev, ctlr, unit, part;
int adapt;
struct devsw *dp = &devsw[0];
dev = B_TYPE(bootdev);
ctlr = B_CONTROLLER(bootdev);
unit = B_UNIT(bootdev);
part = B_PARTITION(bootdev);
adapt = B_ADAPTOR(bootdev);
if (error = devparse(fname, &dev, &adapt, &ctlr, &unit, &part, file))
return(error);
dp = &devsw[dev];
if (!dp->dv_open)
return(ENODEV);
opendev = MAKEBOOTDEV(dev, adapt, ctlr, unit, part);
f->f_dev = dp;
if ((error = (*dp->dv_open)(f, adapt, ctlr, unit, part)) == 0)
return(0);
printf("%s(%d,%d,%d,%d): %s\n", devsw[dev].dv_name,
adapt, ctlr, unit, part, strerror(error));
return(error);
}
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