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/*-
* 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.
*
* $Id: boot.c,v 1.1.1.1 1998/08/21 03:17:41 msmith Exp $
*/
/*
* Loading modules, booting the system
*/
#include <stand.h>
#include <string.h>
#include "bootstrap.h"
static char *getbootfile(int try);
/* List of kernel names to try (may be overwritten by boot.config) XXX should move from here? */
static char *default_bootfiles = "kernel,kernel.old";
/*
* The user wants us to boot.
*/
COMMAND_SET(boot, "boot", "boot a file or loaded kernel", command_boot);
static int
command_boot(int argc, char *argv[])
{
struct loaded_module *km;
char *cp;
int try;
/*
* See if the user has specified an explicit kernel to boot.
*/
if ((argc > 1) && (argv[1][0] != '-')) {
/* XXX maybe we should discard everything and start again? */
if (mod_findmodule(NULL, NULL) != NULL) {
sprintf(command_errbuf, "can't boot '%s', kernel module already loaded", argv[0]);
return(CMD_ERROR);
}
/* find/load the kernel module */
if (mod_load(argv[1], argc - 2, argv + 2) != 0)
return(CMD_ERROR);
/* we have consumed all arguments */
argc = 1;
}
/*
* See if there is a kernel module already loaded
*/
if (mod_findmodule(NULL, NULL) == NULL) {
for (try = 0; (cp = getbootfile(try)) != NULL; try++) {
if (mod_load(cp, argc - 1, argv + 1) != 0) {
printf("can't load '%s'\n", argv[0]);
} else {
/* we have consumed all arguments */
argc = 1;
break;
}
}
}
/*
* Loaded anything yet?
*/
if ((km = mod_findmodule(NULL, NULL)) == NULL) {
command_errmsg = "no bootable kernel";
return(CMD_ERROR);
}
/*
* If we were given arguments, discard any previous.
* XXX should we merge arguments? Hard to DWIM.
*/
if (argc > 1) {
if (km->m_args != NULL)
free(km->m_args);
km->m_args = unargv(argc - 1, argv + 1);
}
/* Hook for platform-specific autoloading of modules */
if (archsw.arch_autoload() != 0)
return(CMD_ERROR);
/* Call the exec handler from the loader matching the kernel */
module_formats[km->m_loader]->l_exec(km);
return(CMD_ERROR);
}
/*
* Autoboot after a delay
*/
COMMAND_SET(autoboot, "autoboot", "boot automatically after a delay", command_autoboot);
/*
* XXX note the 'prompt' argument is not really useful until quoting is implemented
*/
static int
command_autoboot(int argc, char *argv[])
{
int howlong;
char *cp, *prompt;
prompt = NULL;
howlong = -1;
switch(argc) {
case 3:
prompt = argv[2];
/* FALLTHROUGH */
case 2:
howlong = strtol(argv[1], &cp, 0);
if (*cp != 0) {
sprintf(command_errbuf, "bad delay '%s'", argv[1]);
return(CMD_ERROR);
}
/* FALLTHROUGH */
case 1:
return(autoboot(howlong, prompt));
}
command_errmsg = "too many arguments";
return(CMD_ERROR);
}
int
autoboot(int delay, char *prompt)
{
time_t when, otime, ntime;
int c, yes;
char *argv[2];
if (delay == -1)
delay = 5; /* env var? compile-time define? */
otime = time(NULL);
when = otime + delay; /* when to boot */
yes = 0;
/* XXX could try to work out what we might boot */
printf("%s\n", (prompt == NULL) ? "Hit [Enter] to boot immediately, or any other key for command prompt." : prompt);
for (;;) {
if (ischar()) {
c = getchar();
if ((c == '\r') || (c == '\n'))
yes = 1;
break;
}
ntime = time(NULL);
if (ntime == when) {
yes = 1;
break;
}
if (ntime != otime) {
printf("\rBooting [%s] in %d seconds...", getbootfile(0), (int)(when - ntime));
otime = ntime;
}
}
printf("\n");
if (yes) {
argv[0] = "boot";
argv[1] = NULL;
return(command_boot(1, argv));
}
return(CMD_OK);
}
/*
* Scrounge for the name of the (try)'th file we will try to boot.
*/
static char *
getbootfile(int try)
{
static char *name = NULL;
char *spec, *ep;
int len;
/* we use dynamic storage */
if (name != NULL) {
free(name);
name = NULL;
}
/*
* Try $bootfile, then try our builtin default
*/
if ((spec = getenv("bootfile")) == NULL)
spec = default_bootfiles;
while ((try > 0) && (spec != NULL))
spec = strchr(spec, ',');
if (spec != NULL) {
if ((ep = strchr(spec, ',')) != NULL) {
len = ep - spec;
} else {
len = strlen(spec);
}
name = malloc(len + 1);
strncpy(name, spec, len);
name[len] = 0;
}
return(name);
}
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