e12d0ec43a
Allow the MI code to override the preferred console (eg. so that an RB_SERIAL flag from the i386 boot2 can override the default first active console) isapnp.c Use the standard format for ISA PnP IDs. pnp.c Allow trailing comments on lines, be less picky about line contents. ls.c Cosmetic error message fix. panic.c Print the right arguments.
155 lines
4.4 KiB
C
155 lines
4.4 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: console.c,v 1.1.1.1 1998/08/21 03:17:41 msmith Exp $
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*/
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#include <stand.h>
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#include <string.h>
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#include "bootstrap.h"
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/*
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* Core console support
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*/
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static int cons_set(struct env_var *ev, int flags, void *value);
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static int cons_find(char *name);
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/*
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* Detect possible console(s) to use. The first probed console
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* is marked active. Also create the console variable.
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*
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* XXX Add logic for multiple console support.
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*/
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void
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cons_probe(void)
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{
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int cons;
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int active;
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char *prefconsole;
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/* Do all console probes */
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for (cons = 0, active = -1; consoles[cons] != NULL; cons++) {
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consoles[cons]->c_flags = 0;
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consoles[cons]->c_probe(consoles[cons]);
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if ((consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT)) && (active == -1))
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active = cons; /* first candidate */
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}
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/* Check to see if a console preference has already been registered */
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prefconsole = strdup(getenv("console"));
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if (prefconsole != NULL) {
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unsetenv("console"); /* we want to replace this */
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for (cons = 0; consoles[cons] != NULL; cons++)
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/* look for the nominated console, use it if it's functional */
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if (!strcmp(prefconsole, consoles[cons]->c_name) &&
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(consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT)))
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active = cons;
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free(prefconsole);
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}
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consoles[active]->c_flags |= (C_ACTIVEIN | C_ACTIVEOUT);
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printf("Console: %s\n", consoles[active]->c_desc);
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env_setenv("console", 0, consoles[active]->c_name, cons_set, env_nounset);
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}
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int
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getchar(void)
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{
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int cons;
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int rv;
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/* Loop forever polling all active consoles */
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for(;;)
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for (cons = 0; consoles[cons] != NULL; cons++)
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if ((consoles[cons]->c_flags & C_ACTIVEIN) &&
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((rv = consoles[cons]->c_in()) != -1))
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return(rv);
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}
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int
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ischar(void)
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{
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int cons;
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for (cons = 0; consoles[cons] != NULL; cons++)
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if ((consoles[cons]->c_flags & C_ACTIVEIN) &&
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(consoles[cons]->c_ready() != 0))
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return(1);
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return(0);
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}
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void
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putchar(int c)
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{
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int cons;
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/* Expand newlines */
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if (c == '\n')
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putchar('\r');
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for (cons = 0; consoles[cons] != NULL; cons++)
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if (consoles[cons]->c_flags & C_ACTIVEOUT)
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consoles[cons]->c_out(c);
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}
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static int
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cons_find(char *name)
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{
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int cons;
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for (cons = 0; consoles[cons] != NULL; cons++)
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if (!strcmp(consoles[cons]->c_name, name))
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return(cons);
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return(-1);
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}
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/*
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* Select a console.
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*
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* XXX Note that the console system design allows for some extension
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* here (eg. multiple consoles, input/output only, etc.)
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*/
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static int
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cons_set(struct env_var *ev, int flags, void *value)
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{
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int cons, active;
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if ((active = cons_find(value)) == -1) {
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printf("no such console '%s'\n", (char *)value);
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return(CMD_ERROR);
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}
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/* disable all current consoles */
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for (cons = 0; consoles[cons] != NULL; cons++)
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consoles[cons]->c_flags &= ~(C_ACTIVEIN | C_ACTIVEOUT);
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/* enable selected console */
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consoles[active]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT;
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env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
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return(CMD_OK);
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}
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