freebsd-dev/sys/boot/common/commands.c
Mike Smith c2f9d95de5 This is the new unified bootstrap, sometimes known previously as the
'three-stage' bootstrap.
There are a number of caveats with the code in its current state:
 - The i386 bootstrap only supports booting from a floppy.
 - The kernel and kld do not yet know how to deal with the extended
   information and module summary passed in.
 - PnP-based autodetection and demand loading of modules is not implemented.
 - i386 ELF kernel loading is not ready yet.
 - The i386 bootstrap is loaded via an ugly blockmap.

On the alpha, both net- and disk-booting (SRM console machines only) is
supported.  No blockmaps are used by this code.

Obtained from:	Parts from the NetBSD/i386 standalone bootstrap.
1998-08-21 03:17:42 +00:00

156 lines
4.0 KiB
C

/*-
* 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.
*
* $Id$
*/
#include <stand.h>
#include <string.h>
#include <sys/reboot.h>
#include "bootstrap.h"
char *command_errmsg;
char command_errbuf[256]; /* XXX should have procedural interface for setting, size limit? */
COMMAND_SET(help, "help", "detailed help", command_help);
static int
command_help(int argc, char *argv[])
{
char helppath[80]; /* XXX buffer size? */
/* page the help text from our load path */
sprintf(helppath, "%s/boot.help", getenv("loaddev"));
printf("%s\n", helppath);
if (pager_file(helppath) == -1)
printf("Verbose help not available, use '?' to list commands\n");
return(CMD_OK);
}
COMMAND_SET(commandlist, "?", "list commands", command_commandlist);
static int
command_commandlist(int argc, char *argv[])
{
struct bootblk_command **cmdp;
int i;
printf("Available commands:\n");
cmdp = (struct bootblk_command **)Xcommand_set.ls_items;
for (i = 0; i < Xcommand_set.ls_length; i++)
if (cmdp[i]->c_name != NULL)
printf(" %-15s %s\n", cmdp[i]->c_name, cmdp[i]->c_desc);
return(CMD_OK);
}
/*
* XXX set/show should become set/echo if we have variable
* substitution happening.
*/
COMMAND_SET(show, "show", "show variable(s)", command_show);
static int
command_show(int argc, char *argv[])
{
struct env_var *ev;
char *cp;
if (argc < 2) {
/*
* With no arguments, print everything.
*/
pager_open();
for (ev = environ; ev != NULL; ev = ev->ev_next) {
pager_output(ev->ev_name);
cp = getenv(ev->ev_name);
if (cp != NULL) {
pager_output("=");
pager_output(cp);
}
pager_output("\n");
}
pager_close();
} else {
if ((cp = getenv(argv[1])) != NULL) {
printf("%s\n", cp);
} else {
sprintf(command_errbuf, "variable '%s' not found", argv[1]);
return(CMD_ERROR);
}
}
return(CMD_OK);
}
COMMAND_SET(set, "set", "set a variable", command_set);
static int
command_set(int argc, char *argv[])
{
int err;
if (argc != 2) {
command_errmsg = "wrong number of arguments";
return(CMD_ERROR);
} else {
if ((err = putenv(argv[1])) != 0) {
command_errmsg = strerror(err);
return(CMD_ERROR);
}
}
return(CMD_OK);
}
COMMAND_SET(unset, "unset", "unset a variable", command_unset);
static int
command_unset(int argc, char *argv[])
{
int err;
if (argc != 2) {
command_errmsg = "wrong number of arguments";
return(CMD_ERROR);
} else {
if ((err = unsetenv(argv[1])) != 0) {
command_errmsg = strerror(err);
return(CMD_ERROR);
}
}
return(CMD_OK);
}
COMMAND_SET(panic, "panic", "test panic", command_panic);
static int
command_panic(int argc, char *argv[])
{
char *cp;
cp = unargv(argc - 1, argv + 1);
panic(cp);
}