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warnx?/errx? paranoia (use "%s" not a bare string unless it is a
constant).  These are not security holes but it is worth fixing
them anyway both for robustness and so folks looking for examples
in the tree are not misled into doing something potentially dangerous.
Furthermore, it is a bad idea to assume that pathnames will not
include '%' in them and that error routines don't return strings
with '%' in them (especially in light of the possibility of locales).

/*	$OpenBSD: main.c,v 1.6 2000/06/30 16:00:25 millert Exp $	*/
/*	$NetBSD: main.c,v 1.3 1996/05/16 16:00:55 thorpej Exp $	*/

/*-
 * Copyright (c) 1996 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe.
 *
 * 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 NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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.
 */

#include <sys/param.h>
#include <err.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>

#ifdef __sparc__
#include <fcntl.h>
#include <kvm.h>
#include <limits.h>
#include <nlist.h>

#include <machine/openpromio.h>

struct	nlist nl[] = {
	{ "_cputyp" },
#define SYM_CPUTYP	0
	{ NULL },
};

static	char *system = NULL;
#endif /* __sparc__ */

#include <machine/eeprom.h>

#include "defs.h"

struct	keytabent eekeytab[] = {
	{ "hwupdate",		0x10,	ee_hwupdate },
	{ "memsize",		0x14,	ee_num8 },
	{ "memtest",		0x15,	ee_num8 },
	{ "scrsize",		0x16,	ee_screensize },
	{ "watchdog_reboot",	0x17,	ee_truefalse },
	{ "default_boot",	0x18,	ee_truefalse },
	{ "bootdev",		0x19,	ee_bootdev },
	{ "kbdtype",		0x1e,	ee_kbdtype },
	{ "console",		0x1f,	ee_constype },
	{ "keyclick",		0x21,	ee_truefalse },
	{ "diagdev",		0x22,	ee_bootdev },
	{ "diagpath",		0x28,	ee_diagpath },
	{ "columns",		0x50,	ee_num8 },
	{ "rows",		0x51,	ee_num8 },
	{ "ttya_use_baud",	0x58,	ee_truefalse },
	{ "ttya_baud",		0x59,	ee_num16 },
	{ "ttya_no_rtsdtr",	0x5b,	ee_truefalse },
	{ "ttyb_use_baud",	0x60,	ee_truefalse },
	{ "ttyb_baud",		0x61,	ee_num16 },
	{ "ttyb_no_rtsdtr",	0x63,	ee_truefalse },
	{ "banner",		0x68,	ee_banner },
	{ "secure",		0,	ee_notsupp },
	{ "bad_login",		0,	ee_notsupp },
	{ "password",		0,	ee_notsupp },
	{ NULL,			0,	ee_notsupp },
};

static	void action __P((char *));
static	void dump_prom __P((void));
static	void usage __P((void));
#ifdef __sparc__
static	int getcputype __P((void));
#endif /* __sparc__ */

char	*path_eeprom = "/dev/eeprom";
char	*path_openprom = "/dev/openprom";
int	fix_checksum = 0;
int	ignore_checksum = 0;
int	update_checksums = 0;
int	cksumfail = 0;
u_short	writecount;
int	eval = 0;
int	use_openprom = 0;
int	verbose = 0;

extern	char *__progname;

int
main(argc, argv)
	int argc;
	char **argv;
{
	int ch, do_stdin = 0;
	char *cp, line[BUFSIZE];
#ifdef __sparc__
	char *optstring = "-cf:ivN:";
#else
	char *optstring = "-cf:i";
#endif /* __sparc__ */

	while ((ch = getopt(argc, argv, optstring)) != -1)
		switch (ch) {
		case '-':
			do_stdin = 1;
			break;

		case 'c':
			fix_checksum = 1;
			break;

		case 'f':
			path_eeprom = path_openprom = optarg;
			break;

		case 'i':
			ignore_checksum = 1;
			break;
#ifdef __sparc__
		case 'v':
			verbose = 1;
			break;

		case 'N':
			system = optarg;
			break;

#endif /* __sparc__ */

		case '?':
		default:
			usage();
		}
	argc -= optind;
	argv += optind;

#ifdef __sparc__
	if (system != NULL) {
		setegid(getgid());
		setgid(getgid());
	}
	if (getcputype() != CPU_SUN4)
		use_openprom = 1;
#endif /* __sparc__ */

	if (use_openprom == 0) {
		ee_verifychecksums();
		if (fix_checksum || cksumfail)
			exit(cksumfail);
	}

	if (do_stdin) {
		while (fgets(line, BUFSIZE, stdin) != NULL) {
			if (line[0] == '\n')
				continue;
			if ((cp = strrchr(line, '\n')) != NULL)
				*cp = '\0';
			action(line);
		}
		if (ferror(stdin))
			err(++eval, "stdin");
	} else {
		if (argc == 0) {
			dump_prom();
			exit(eval + cksumfail);
		}

		while (argc) {
			action(*argv);
			++argv;
			--argc;
		}
	}

	if (use_openprom == 0)
		if (update_checksums) {
			++writecount;
			ee_updatechecksums();
		}

	exit(eval + cksumfail);
}

#ifdef __sparc__
#define KVM_ABORT(kd, str) {						\
	(void)kvm_close((kd));						\
	errx(1, "%s: %s", (str), kvm_geterr((kd)));			\
}

static int
getcputype()
{
	char errbuf[_POSIX2_LINE_MAX];
	int cputype;
	kvm_t *kd;

	bzero(errbuf, sizeof(errbuf));

	if ((kd = kvm_openfiles(system, NULL, NULL, O_RDONLY, errbuf)) == NULL)
		errx(1, "can't open kvm: %s", errbuf);

	setegid(getgid());
	setgid(getgid());

	if (kvm_nlist(kd, nl))
		KVM_ABORT(kd, "can't read symbol table");

	if (kvm_read(kd, nl[SYM_CPUTYP].n_value, (char *)&cputype,
	    sizeof(cputype)) != sizeof(cputype))
		KVM_ABORT(kd, "can't determine cpu type");

	(void)kvm_close(kd);
	return (cputype);
}
#endif /* __sparc__ */

/*
 * Separate the keyword from the argument (if any), find the keyword in
 * the table, and call the corresponding handler function.
 */
static void
action(line)
	char *line;
{
	char *keyword, *arg, *cp;
	struct keytabent *ktent;

	keyword = strdup(line);
	if ((arg = strrchr(keyword, '=')) != NULL)
		*arg++ = '\0';

#ifdef __sparc__
	if (use_openprom) {
		/*
		 * The whole point of the Openprom is that one
		 * isn't required to know the keywords.  With this
		 * in mind, we just dump the whole thing off to
		 * the generic op_handler.
		 */
		if ((cp = op_handler(keyword, arg)) != NULL)
			warnx("%s", cp);
		return;
	} else
#endif /* __sparc__ */
		for (ktent = eekeytab; ktent->kt_keyword != NULL; ++ktent) {
			if (strcmp(ktent->kt_keyword, keyword) == 0) {
				(*ktent->kt_handler)(ktent, arg);
				return; 
			}
		}

	warnx("unknown keyword %s", keyword);
	++eval;
}

/*
 * Dump the contents of the prom corresponding to all known keywords.
 */
static void
dump_prom()
{
	struct keytabent *ktent;

#ifdef __sparc__
	if (use_openprom) {
		/*
		 * We have a special dump routine for this.
		 */
		op_dump();
	} else
#endif /* __sparc__ */
		for (ktent = eekeytab; ktent->kt_keyword != NULL; ++ktent)
			(*ktent->kt_handler)(ktent, NULL);
}

static void
usage()
{

#ifdef __sparc__
	fprintf(stderr, "usage: %s %s %s\n", __progname,
	    "[-] [-c] [-f device] [-i] [-v]",
	    "[-N system] [field[=value] ...]");
#else
	fprintf(stderr, "usage: %s %s\n", __progname,
	    "[-] [-c] [-f device] [-i] [field[=value] ...]");
#endif /* __sparc__ */
	exit(1);
}