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/* $OpenBSD: devopen.c,v 1.7 2010/12/06 22:51:46 jasper Exp $ */
/*
* Copyright (c) 2004 Tom Cosgrove
* Copyright (c) 1996-1999 Michael Shalayeff
* 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.
*
* 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 OR HIS RELATIVES 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 MIND, 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 "libsa.h"
#include "biosdev.h"
#include <sys/param.h>
#include <dev/cons.h>
extern int debug;
extern char *fs_name[];
extern int nfsname;
extern struct devsw netsw[];
extern char *bootmac; /* Gets passed to kernel for network boot */
/* XXX use slot for 'rd' for 'hd' pseudo-device */
const char bdevs[][4] = {
"wd", "", "fd", "", "sd", "st", "cd", "mcd",
"", "", "", "", "", "", "", "scd", "", "hd", ""
};
const int nbdevs = nitems(bdevs);
const char cdevs[][4] = {
"cn", "", "", "", "", "", "", "",
"com", "", "", "", "pc"
};
const int ncdevs = nitems(cdevs);
/* pass dev_t to the open routines */
int
devopen(struct open_file *f, const char *fname, char **file)
{
struct devsw *dp = devsw;
char *p;
char *stripdev;
int i, l;
int rc = 1;
*file = (char *)fname;
#ifdef DEBUG
if (debug)
printf("devopen(%s):", fname);
#endif
/* Make sure we have a prefix, e.g. hd0a: or tftp:. */
for (p = (char *)fname; *p != ':' && *p != '\0'; ) p++;
if (*p != ':')
return 1;
stripdev = p + 1;
l = p - fname; /* Length of device prefix. */
for (i = 0; i < nfsname; i++) {
if ((fs_name[i] != NULL) &&
(strncmp(fname, fs_name[i], l) == 0)) {
/* Force oopen() etc to use this filesystem. */
f->f_ops = &file_system[i];
f->f_dev = dp = &netsw[0];
rc = (*dp->dv_open)(f, NULL);
if (rc == 0)
*file = stripdev;
else
f->f_dev = NULL;
#ifdef DEBUG
if (debug)
putchar('\n');
#endif
return rc;
}
}
/*
* Assume that any network filesystems would be caught by the
* code above, so that the next phase of devopen() is only for
* local devices.
*
* Clear bootmac, to signal that we loaded this file from a
* non-network device.
*/
bootmac = NULL;
for (i = 0; i < ndevs && rc != 0; dp++, i++) {
#ifdef DEBUG
if (debug)
printf(" %s: ", dp->dv_name);
#endif
if ((rc = (*dp->dv_open)(f, file)) == 0) {
f->f_dev = dp;
return 0;
}
#ifdef DEBUG
else if (debug)
printf("%d", rc);
#endif
}
#ifdef DEBUG
if (debug)
putchar('\n');
#endif
if ((f->f_flags & F_NODEV) == 0)
f->f_dev = dp;
return rc;
}
void
devboot(dev_t bootdev, char *p)
{
*p++ = 't';
*p++ = 'f';
*p++ = 't';
*p++ = 'p';
*p = '\0';
}
int pch_pos = 0;
void
putchar(int c)
{
switch (c) {
case '\177': /* DEL erases */
cnputc('\b');
cnputc(' ');
case '\b':
cnputc('\b');
if (pch_pos)
pch_pos--;
break;
case '\t':
do
cnputc(' ');
while (++pch_pos % 8);
break;
case '\n':
case '\r':
cnputc(c);
pch_pos=0;
break;
default:
cnputc(c);
pch_pos++;
break;
}
}
int
getchar(void)
{
register int c = cngetc();
if (c == '\r')
c = '\n';
if ((c < ' ' && c != '\n') || c == '\177')
return c;
putchar(c);
return c;
}
char ttyname_buf[8];
char *
ttyname(int fd)
{
snprintf(ttyname_buf, sizeof ttyname_buf, "%s%d",
cdevs[major(cn_tab->cn_dev)], minor(cn_tab->cn_dev));
return ttyname_buf;
}
dev_t
ttydev(char *name)
{
int i, unit = -1;
char *no = name + strlen(name) - 1;
while (no >= name && *no >= '0' && *no <= '9')
unit = (unit < 0 ? 0 : (unit * 10)) + *no-- - '0';
if (no < name || unit < 0)
return NODEV;
for (i = 0; i < ncdevs; i++)
if (strncmp(name, cdevs[i], no - name + 1) == 0)
return (makedev(i, unit));
return NODEV;
}
int
cnspeed(dev_t dev, int sp)
{
if (major(dev) == 8) /* comN */
return (comspeed(dev, sp));
/* pc0 and anything else */
return 9600;
}
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