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main.c revision 1.6 
      1 /*	$NetBSD: main.c,v 1.6 1997/07/28 19:29:54 fair Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
     30  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #ifndef lint
     41 __COPYRIGHT(
     42 "@(#) Copyright (c) 1996 The NetBSD Foundation, Inc.  All rights reserved.");
     43 __RCSID("$NetBSD: main.c,v 1.6 1997/07/28 19:29:54 fair Exp $");
     44 #endif
     45 
     46 #include <sys/param.h>
     47 #include <err.h>
     48 #include <string.h>
     49 #include <stdio.h>
     50 #include <unistd.h>
     51 
     52 #ifdef __sparc__
     53 #include <fcntl.h>
     54 #include <kvm.h>
     55 #include <limits.h>
     56 #include <nlist.h>
     57 
     58 #include <machine/openpromio.h>
     59 
     60 struct	nlist nl[] = {
     61 	{ "_cputyp" },
     62 #define SYM_CPUTYP	0
     63 	{ NULL },
     64 };
     65 
     66 static	char *system = NULL;
     67 #endif /* __sparc__ */
     68 
     69 #include <machine/eeprom.h>
     70 
     71 #include "defs.h"
     72 
     73 struct	keytabent eekeytab[] = {
     74 	{ "hwupdate",		0x10,	ee_hwupdate },
     75 	{ "memsize",		0x14,	ee_num8 },
     76 	{ "memtest",		0x15,	ee_num8 },
     77 	{ "scrsize",		0x16,	ee_screensize },
     78 	{ "watchdog_reboot",	0x17,	ee_truefalse },
     79 	{ "default_boot",	0x18,	ee_truefalse },
     80 	{ "bootdev",		0x19,	ee_bootdev },
     81 	{ "kbdtype",		0x1e,	ee_kbdtype },
     82 	{ "console",		0x1f,	ee_constype },
     83 	{ "keyclick",		0x21,	ee_truefalse },
     84 	{ "diagdev",		0x22,	ee_bootdev },
     85 	{ "diagpath",		0x28,	ee_diagpath },
     86 	{ "columns",		0x50,	ee_num8 },
     87 	{ "rows",		0x51,	ee_num8 },
     88 	{ "ttya_use_baud",	0x58,	ee_truefalse },
     89 	{ "ttya_baud",		0x59,	ee_num16 },
     90 	{ "ttya_no_rtsdtr",	0x5b,	ee_truefalse },
     91 	{ "ttyb_use_baud",	0x60,	ee_truefalse },
     92 	{ "ttyb_baud",		0x61,	ee_num16 },
     93 	{ "ttyb_no_rtsdtr",	0x63,	ee_truefalse },
     94 	{ "banner",		0x68,	ee_banner },
     95 	{ "secure",		0,	ee_notsupp },
     96 	{ "bad_login",		0,	ee_notsupp },
     97 	{ "password",		0,	ee_notsupp },
     98 	{ NULL,			0,	ee_notsupp },
     99 };
    100 
    101 int	main __P((int, char *[]));
    102 static	void action __P((char *));
    103 static	void dump_prom __P((void));
    104 static	void usage __P((void));
    105 #ifdef __sparc__
    106 static	int getcputype __P((void));
    107 #endif /* __sparc__ */
    108 
    109 char	*path_eeprom = "/dev/eeprom";
    110 char	*path_openprom = "/dev/openprom";
    111 int	fix_checksum = 0;
    112 int	ignore_checksum = 0;
    113 int	update_checksums = 0;
    114 int	cksumfail = 0;
    115 u_short	writecount;
    116 int	eval = 0;
    117 int	use_openprom = 0;
    118 int	verbose = 0;
    119 
    120 extern	char *__progname;
    121 
    122 int
    123 main(argc, argv)
    124 	int argc;
    125 	char *argv[];
    126 {
    127 	int ch, do_stdin = 0;
    128 	char *cp, line[BUFSIZE];
    129 #ifdef __sparc__
    130 	char *optstring = "-cf:ivN:";
    131 #else
    132 	char *optstring = "-cf:i";
    133 #endif /* __sparc__ */
    134 
    135 	while ((ch = getopt(argc, argv, optstring)) != -1)
    136 		switch (ch) {
    137 		case '-':
    138 			do_stdin = 1;
    139 			break;
    140 
    141 		case 'c':
    142 			fix_checksum = 1;
    143 			break;
    144 
    145 		case 'f':
    146 			path_eeprom = path_openprom = optarg;
    147 			break;
    148 
    149 		case 'i':
    150 			ignore_checksum = 1;
    151 			break;
    152 #ifdef __sparc__
    153 		case 'v':
    154 			verbose = 1;
    155 			break;
    156 
    157 		case 'N':
    158 			system = optarg;
    159 			break;
    160 
    161 #endif /* __sparc__ */
    162 
    163 		case '?':
    164 		default:
    165 			usage();
    166 		}
    167 	argc -= optind;
    168 	argv += optind;
    169 
    170 #ifdef __sparc__
    171 	/*
    172 	 * Discard setgid setgid privileges if not the running kernel so
    173 	 * that bad guys can't print interesting stuff from kernel memory.
    174 	 */
    175 	if (system != NULL)
    176 		setgid(getgid());
    177 	if (getcputype() != CPU_SUN4)
    178 		use_openprom = 1;
    179 #endif /* __sparc__ */
    180 
    181 	if (use_openprom == 0) {
    182 		ee_verifychecksums();
    183 		if (fix_checksum || cksumfail)
    184 			exit(cksumfail);
    185 	}
    186 
    187 	if (do_stdin) {
    188 		while (fgets(line, BUFSIZE, stdin) != NULL) {
    189 			if (line[0] == '\n')
    190 				continue;
    191 			if ((cp = strrchr(line, '\n')) != NULL)
    192 				*cp = '\0';
    193 			action(line);
    194 		}
    195 		if (ferror(stdin))
    196 			err(++eval, "stdin");
    197 	} else {
    198 		if (argc == 0) {
    199 			dump_prom();
    200 			exit(eval + cksumfail);
    201 		}
    202 
    203 		while (argc) {
    204 			action(*argv);
    205 			++argv;
    206 			--argc;
    207 		}
    208 	}
    209 
    210 	if (use_openprom == 0)
    211 		if (update_checksums) {
    212 			++writecount;
    213 			ee_updatechecksums();
    214 		}
    215 
    216 	exit(eval + cksumfail);
    217 }
    218 
    219 #ifdef __sparc__
    220 #define KVM_ABORT(kd, str) {						\
    221 	(void)kvm_close((kd));						\
    222 	errx(1, "%s: %s", (str), kvm_geterr((kd)));			\
    223 }
    224 
    225 static int
    226 getcputype()
    227 {
    228 	char errbuf[_POSIX2_LINE_MAX];
    229 	int cputype;
    230 	kvm_t *kd;
    231 
    232 	bzero(errbuf, sizeof(errbuf));
    233 
    234 	if ((kd = kvm_openfiles(system, NULL, NULL, O_RDONLY, errbuf)) == NULL)
    235 		errx(1, "can't open kvm: %s", errbuf);
    236 
    237 	if (kvm_nlist(kd, nl))
    238 		KVM_ABORT(kd, "can't read symbol table");
    239 
    240 	if (kvm_read(kd, nl[SYM_CPUTYP].n_value, (char *)&cputype,
    241 	    sizeof(cputype)) != sizeof(cputype))
    242 		KVM_ABORT(kd, "can't determine cpu type");
    243 
    244 	(void)kvm_close(kd);
    245 	return (cputype);
    246 }
    247 #endif /* __sparc__ */
    248 
    249 /*
    250  * Separate the keyword from the argument (if any), find the keyword in
    251  * the table, and call the corresponding handler function.
    252  */
    253 static void
    254 action(line)
    255 	char *line;
    256 {
    257 	char *keyword, *arg;
    258 	struct keytabent *ktent;
    259 
    260 	keyword = strdup(line);
    261 	if ((arg = strrchr(keyword, '=')) != NULL)
    262 		*arg++ = '\0';
    263 
    264 #ifdef __sparc__
    265 	if (use_openprom) {
    266 		char	*cp;
    267 		/*
    268 		 * The whole point of the Openprom is that one
    269 		 * isn't required to know the keywords.  With this
    270 		 * in mind, we just dump the whole thing off to
    271 		 * the generic op_handler.
    272 		 */
    273 		if ((cp = op_handler(keyword, arg)) != NULL)
    274 			warnx(cp);
    275 		return;
    276 	} else
    277 #endif /* __sparc__ */
    278 		for (ktent = eekeytab; ktent->kt_keyword != NULL; ++ktent) {
    279 			if (strcmp(ktent->kt_keyword, keyword) == 0) {
    280 				(*ktent->kt_handler)(ktent, arg);
    281 				return;
    282 			}
    283 		}
    284 
    285 	warnx("unknown keyword %s", keyword);
    286 	++eval;
    287 }
    288 
    289 /*
    290  * Dump the contents of the prom corresponding to all known keywords.
    291  */
    292 static void
    293 dump_prom()
    294 {
    295 	struct keytabent *ktent;
    296 
    297 #ifdef __sparc__
    298 	if (use_openprom) {
    299 		/*
    300 		 * We have a special dump routine for this.
    301 		 */
    302 		op_dump();
    303 	} else
    304 #endif /* __sparc__ */
    305 		for (ktent = eekeytab; ktent->kt_keyword != NULL; ++ktent)
    306 			(*ktent->kt_handler)(ktent, NULL);
    307 }
    308 
    309 static void
    310 usage()
    311 {
    312 
    313 #ifdef __sparc__
    314 	fprintf(stderr, "usage: %s %s %s\n", __progname,
    315 	    "[-] [-c] [-f device] [-i] [-v]",
    316 	    "[-N system] [field[=value] ...]");
    317 #else
    318 	fprintf(stderr, "usage: %s %s\n", __progname,
    319 	    "[-] [-c] [-f device] [-i] [field[=value] ...]");
    320 #endif /* __sparc__ */
    321 	exit(1);
    322 }
    323