/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* 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 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stand.h>
#include <string.h>
#include "bootstrap.h"
/*
* Core console support
*/
static int cons_set(struct env_var *ev, int flags, const void *value);
static int cons_find(const char *name);
static int cons_check(const char *string);
static int cons_change(const char *string);
static int twiddle_set(struct env_var *ev, int flags, const void *value);
/*
* Detect possible console(s) to use. If preferred console(s) have been
* specified, mark them as active. Else, mark the first probed console
* as active. Also create the console variable.
*/
void
cons_probe(void)
{
int cons;
int active;
char *prefconsole;
/* We want a callback to install the new value when this var changes. */
env_setenv("twiddle_divisor", EV_VOLATILE, "1", twiddle_set, env_nounset);
/* Do all console probes */
for (cons = 0; consoles[cons] != NULL; cons++) {
consoles[cons]->c_flags = 0;
consoles[cons]->c_probe(consoles[cons]);
}
/* Now find the first working one */
active = -1;
for (cons = 0; consoles[cons] != NULL && active == -1; cons++) {
consoles[cons]->c_flags = 0;
consoles[cons]->c_probe(consoles[cons]);
if (consoles[cons]->c_flags == (C_PRESENTIN | C_PRESENTOUT))
active = cons;
}
/* Force a console even if all probes failed */
if (active == -1)
active = 0;
/* Check to see if a console preference has already been registered */
prefconsole = getenv("console");
if (prefconsole != NULL)
prefconsole = strdup(prefconsole);
if (prefconsole != NULL) {
unsetenv("console"); /* we want to replace this */
cons_change(prefconsole);
} else {
consoles[active]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT;
consoles[active]->c_init(0);
prefconsole = strdup(consoles[active]->c_name);
}
printf("Consoles: ");
for (cons = 0; consoles[cons] != NULL; cons++)
if (consoles[cons]->c_flags & (C_ACTIVEIN | C_ACTIVEOUT))
printf("%s ", consoles[cons]->c_desc);
printf("\n");
if (prefconsole != NULL) {
env_setenv("console", EV_VOLATILE, prefconsole, cons_set,
env_nounset);
free(prefconsole);
}
}
int
getchar(void)
{
int cons;
int rv;
/* Loop forever polling all active consoles */
for(;;)
for (cons = 0; consoles[cons] != NULL; cons++)
if ((consoles[cons]->c_flags & (C_PRESENTIN | C_ACTIVEIN)) ==
(C_PRESENTIN | C_ACTIVEIN) &&
((rv = consoles[cons]->c_in()) != -1))
return(rv);
}
int
ischar(void)
{
int cons;
for (cons = 0; consoles[cons] != NULL; cons++)
if ((consoles[cons]->c_flags & (C_PRESENTIN | C_ACTIVEIN)) ==
(C_PRESENTIN | C_ACTIVEIN) &&
(consoles[cons]->c_ready() != 0))
return(1);
return(0);
}
void
putchar(int c)
{
int cons;
/* Expand newlines */
if (c == '\n')
putchar('\r');
for (cons = 0; consoles[cons] != NULL; cons++)
if ((consoles[cons]->c_flags & (C_PRESENTOUT | C_ACTIVEOUT)) ==
(C_PRESENTOUT | C_ACTIVEOUT))
consoles[cons]->c_out(c);
}
/*
* Find the console with the specified name.
*/
static int
cons_find(const char *name)
{
int cons;
for (cons = 0; consoles[cons] != NULL; cons++)
if (!strcmp(consoles[cons]->c_name, name))
return (cons);
return (-1);
}
/*
* Select one or more consoles.
*/
static int
cons_set(struct env_var *ev, int flags, const void *value)
{
int ret;
if ((value == NULL) || (cons_check(value) == 0)) {
/*
* Return CMD_OK instead of CMD_ERROR to prevent forth syntax error,
* which would prevent it processing any further loader.conf entries.
*/
return (CMD_OK);
}
ret = cons_change(value);
if (ret != CMD_OK)
return (ret);
env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
return (CMD_OK);
}
/*
* Check that at least one the consoles listed in *string is valid
*/
static int
cons_check(const char *string)
{
int cons, found, failed;
char *curpos, *dup, *next;
dup = next = strdup(string);
found = failed = 0;
while (next != NULL) {
curpos = strsep(&next, " ,");
if (*curpos != '\0') {
cons = cons_find(curpos);
if (cons == -1) {
printf("console %s is invalid!\n", curpos);
failed++;
} else {
found++;
}
}
}
free(dup);
if (found == 0)
printf("no valid consoles!\n");
if (found == 0 || failed != 0) {
printf("Available consoles:\n");
for (cons = 0; consoles[cons] != NULL; cons++)
printf(" %s\n", consoles[cons]->c_name);
}
return (found);
}
/*
* Activate all the valid consoles listed in *string and disable all others.
*/
static int
cons_change(const char *string)
{
int cons, active;
char *curpos, *dup, *next;
/* Disable all consoles */
for (cons = 0; consoles[cons] != NULL; cons++) {
consoles[cons]->c_flags &= ~(C_ACTIVEIN | C_ACTIVEOUT);
}
/* Enable selected consoles */
dup = next = strdup(string);
active = 0;
while (next != NULL) {
curpos = strsep(&next, " ,");
if (*curpos == '\0')
continue;
cons = cons_find(curpos);
if (cons >= 0) {
consoles[cons]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT;
consoles[cons]->c_init(0);
if ((consoles[cons]->c_flags & (C_PRESENTIN | C_PRESENTOUT)) ==
(C_PRESENTIN | C_PRESENTOUT)) {
active++;
continue;
}
if (active != 0) {
/* If no consoles have initialised we wouldn't see this. */
printf("console %s failed to initialize\n", consoles[cons]->c_name);
}
}
}
free(dup);
if (active == 0) {
/* All requested consoles failed to initialise, try to recover. */
for (cons = 0; consoles[cons] != NULL; cons++) {
consoles[cons]->c_flags |= C_ACTIVEIN | C_ACTIVEOUT;
consoles[cons]->c_init(0);
if ((consoles[cons]->c_flags &
(C_PRESENTIN | C_PRESENTOUT)) ==
(C_PRESENTIN | C_PRESENTOUT))
active++;
}
if (active == 0)
return (CMD_ERROR); /* Recovery failed. */
}
return (CMD_OK);
}
/*
* Change the twiddle divisor.
*
* The user can set the twiddle_divisor variable to directly control how fast
* the progress twiddle spins, useful for folks with slow serial consoles. The
* code to monitor changes to the variable and propagate them to the twiddle
* routines has to live somewhere. Twiddling is console-related so it's here.
*/
static int
twiddle_set(struct env_var *ev, int flags, const void *value)
{
u_long tdiv;
char * eptr;
tdiv = strtoul(value, &eptr, 0);
if (*(const char *)value == 0 || *eptr != 0) {
printf("invalid twiddle_divisor '%s'\n", (const char *)value);
return (CMD_ERROR);
}
twiddle_divisor((u_int)tdiv);
env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
return(CMD_OK);
}
