8d4e5523d8
(b) add a function callback vector to tty drivers that will return a pointer
to a valid tty structure based upon a dev_t
(c) make syscons structures the same size whether or not APM is enabled so
utilities don't crash if NAPM changes (and make the damn kernel compile!)
(d) rewrite /dev/snp ioctl interface so that it is device driver and i386
independant
279 lines
6.4 KiB
C
279 lines
6.4 KiB
C
/*
|
|
* Copyright (c) 1988 University of Utah.
|
|
* Copyright (c) 1991 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* the Systems Programming Group of the University of Utah Computer
|
|
* Science Department.
|
|
*
|
|
* 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.
|
|
*
|
|
* from: @(#)cons.c 7.2 (Berkeley) 5/9/91
|
|
* $Id: cons.c,v 1.21 1995/01/23 18:46:13 davidg Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/tty.h>
|
|
|
|
#include <machine/cons.h>
|
|
#include <machine/stdarg.h>
|
|
|
|
/* XXX - all this could be autoconfig()ed */
|
|
#include "sc.h"
|
|
#include "vt.h"
|
|
#if NSC > 0 || NVT > 0
|
|
int pccnprobe(), pccninit(), pccngetc(), pccncheckc(), pccnputc();
|
|
#endif
|
|
|
|
#include "sio.h"
|
|
#if NSIO > 0
|
|
int siocnprobe(), siocninit(), siocngetc(), siocncheckc(), siocnputc();
|
|
#endif
|
|
|
|
static struct consdev constab[] = {
|
|
#if NSC > 0 || NVT > 0
|
|
{ pccnprobe, pccninit, pccngetc, pccncheckc, pccnputc },
|
|
#endif
|
|
#if NSIO > 0
|
|
{ siocnprobe, siocninit, siocngetc, siocncheckc, siocnputc },
|
|
#endif
|
|
{ 0 },
|
|
};
|
|
/* end XXX */
|
|
|
|
struct tty *constty = 0; /* virtual console output device */
|
|
struct tty *cn_tty; /* XXX: console tty struct for tprintf */
|
|
|
|
/* XXX */
|
|
typedef u_char bool_t;
|
|
|
|
static bool_t cn_is_open; /* nonzero if logical console is open */
|
|
static bool_t cn_phys_is_open; /* nonzero if physical console is open */
|
|
static d_close_t *cn_phys_close; /* physical device close function */
|
|
static d_open_t *cn_phys_open; /* physical device open function */
|
|
static struct consdev *cn_tab; /* physical console device info */
|
|
|
|
void
|
|
cninit()
|
|
{
|
|
register struct consdev *cp;
|
|
struct cdevsw *cdp;
|
|
|
|
/*
|
|
* Collect information about all possible consoles
|
|
* and find the one with highest priority
|
|
*/
|
|
for (cp = constab; cp->cn_probe; cp++) {
|
|
(*cp->cn_probe)(cp);
|
|
if (cp->cn_pri > CN_DEAD &&
|
|
(cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri))
|
|
cn_tab = cp;
|
|
}
|
|
/*
|
|
* No console, give up.
|
|
*/
|
|
if ((cp = cn_tab) == NULL)
|
|
return;
|
|
/*
|
|
* Hook the open and close functions.
|
|
*/
|
|
cdp = &cdevsw[major(cn_tab->cn_dev)];
|
|
cn_phys_close = cdp->d_close;
|
|
cdp->d_close = cnclose;
|
|
cn_phys_open = cdp->d_open;
|
|
cdp->d_open = cnopen;
|
|
/*
|
|
* Turn on console
|
|
*/
|
|
cn_tty = cp->cn_tp;
|
|
(*cp->cn_init)(cp);
|
|
}
|
|
|
|
int
|
|
cnopen(dev, flag, mode, p)
|
|
dev_t dev;
|
|
int flag, mode;
|
|
struct proc *p;
|
|
{
|
|
dev_t cndev, physdev;
|
|
int retval;
|
|
|
|
if (cn_tab == NULL)
|
|
return (0);
|
|
cndev = cn_tab->cn_dev;
|
|
physdev = (major(dev) == major(cndev) ? dev : cndev);
|
|
retval = (*cn_phys_open)(physdev, flag, mode, p);
|
|
if (retval == 0) {
|
|
if (dev == cndev)
|
|
cn_phys_is_open = 1;
|
|
else if (physdev == cndev)
|
|
cn_is_open = 1;
|
|
}
|
|
return (retval);
|
|
}
|
|
|
|
int
|
|
cnclose(dev, flag, mode, p)
|
|
dev_t dev;
|
|
int flag, mode;
|
|
struct proc *p;
|
|
{
|
|
dev_t cndev;
|
|
|
|
if (cn_tab == NULL)
|
|
return (0);
|
|
cndev = cn_tab->cn_dev;
|
|
if (dev == cndev) {
|
|
cn_phys_is_open = 0;
|
|
if (cn_is_open)
|
|
return (0);
|
|
} else if (major(dev) != major(cndev)) {
|
|
cn_is_open = 0;
|
|
if (cn_phys_is_open)
|
|
return (0);
|
|
dev = cndev;
|
|
}
|
|
return ((*cn_phys_close)(dev, flag, mode, p));
|
|
}
|
|
|
|
int
|
|
cnread(dev, uio, flag)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
if (cn_tab == NULL)
|
|
return (0);
|
|
dev = cn_tab->cn_dev;
|
|
return ((*cdevsw[major(dev)].d_read)(dev, uio, flag));
|
|
}
|
|
|
|
int
|
|
cnwrite(dev, uio, flag)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flag;
|
|
{
|
|
if (cn_tab == NULL)
|
|
return (0);
|
|
if (constty)
|
|
dev = constty->t_dev;
|
|
else
|
|
dev = cn_tab->cn_dev;
|
|
return ((*cdevsw[major(dev)].d_write)(dev, uio, flag));
|
|
}
|
|
|
|
int
|
|
cnioctl(dev, cmd, data, flag, p)
|
|
dev_t dev;
|
|
int cmd;
|
|
caddr_t data;
|
|
int flag;
|
|
struct proc *p;
|
|
{
|
|
int error;
|
|
|
|
if (cn_tab == NULL)
|
|
return (0);
|
|
/*
|
|
* Superuser can always use this to wrest control of console
|
|
* output from the "virtual" console.
|
|
*/
|
|
if (cmd == TIOCCONS && constty) {
|
|
error = suser(p->p_ucred, (u_short *) NULL);
|
|
if (error)
|
|
return (error);
|
|
constty = NULL;
|
|
return (0);
|
|
}
|
|
dev = cn_tab->cn_dev;
|
|
return ((*cdevsw[major(dev)].d_ioctl)(dev, cmd, data, flag, p));
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
int
|
|
cnselect(dev, rw, p)
|
|
dev_t dev;
|
|
int rw;
|
|
struct proc *p;
|
|
{
|
|
if (cn_tab == NULL)
|
|
return (1);
|
|
|
|
dev = cn_tab->cn_dev;
|
|
|
|
return ((*cdevsw[major(dev)].d_select)(dev, rw, p));
|
|
}
|
|
|
|
int
|
|
cngetc()
|
|
{
|
|
int c;
|
|
if (cn_tab == NULL)
|
|
return (0);
|
|
c = (*cn_tab->cn_getc)(cn_tab->cn_dev);
|
|
if (c == '\r') c = '\n'; /* console input is always ICRNL */
|
|
return (c);
|
|
}
|
|
|
|
int
|
|
cncheckc()
|
|
{
|
|
if (cn_tab == NULL)
|
|
return (0);
|
|
return ((*cn_tab->cn_checkc)(cn_tab->cn_dev));
|
|
}
|
|
|
|
void
|
|
cnputc(c)
|
|
register int c;
|
|
{
|
|
if (cn_tab == NULL)
|
|
return;
|
|
if (c) {
|
|
(*cn_tab->cn_putc)(cn_tab->cn_dev, c);
|
|
if (c == '\n')
|
|
(*cn_tab->cn_putc)(cn_tab->cn_dev, '\r');
|
|
}
|
|
}
|
|
|
|
int
|
|
pg(const char *p, ...) {
|
|
va_list args;
|
|
va_start(args, p);
|
|
printf("%r\n>", p, args);
|
|
return(cngetc());
|
|
}
|
|
|
|
|