1 /* $NetBSD: ophandlers.c,v 1.11 2011/01/04 09:25:21 wiz 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/ioctl.h> 34 #include <err.h> 35 #include <errno.h> 36 #include <fcntl.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 #include <machine/eeprom.h> 42 #include <machine/openpromio.h> 43 44 #include "defs.h" 45 46 extern char *path_openprom; 47 extern int eval; 48 extern int verbose; 49 50 static char err_str[BUFSIZE]; 51 52 static void op_notsupp (struct extabent *, struct opiocdesc *, char *); 53 54 /* 55 * There are several known fields that I either don't know how to 56 * deal with or require special treatment. 57 */ 58 static struct extabent opextab[] = { 59 { "security-password", op_notsupp }, 60 { "security-mode", op_notsupp }, 61 { "oem-logo", op_notsupp }, 62 { NULL, op_notsupp }, 63 }; 64 65 #define BARF(str1, str2) { \ 66 snprintf(err_str, sizeof err_str, "%s: %s", (str1), (str2)); \ 67 ++eval; \ 68 return (err_str); \ 69 }; 70 71 void 72 op_action(keyword, arg) 73 char *keyword, *arg; 74 { 75 char *cp; 76 77 if ((cp = op_handler(keyword, arg)) != NULL) 78 warnx("%s", cp); 79 return; 80 } 81 82 #if defined(__sparc__) && !defined(__arch64__) 83 int 84 check_for_openprom() 85 { 86 int fd, rv, optnode; 87 88 /* if we can't open it, obviously we can't use it. */ 89 if ((fd = open(path_openprom, O_RDONLY)) < 0) 90 return (0); 91 92 /* check for the presence of OpenFirmware with OPIOCGETOPTNODE */ 93 rv = ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode); 94 close (fd); 95 96 return (rv == 0); 97 } 98 #endif 99 100 char * 101 op_handler(keyword, arg) 102 char *keyword, *arg; 103 { 104 struct opiocdesc opio; 105 struct extabent *ex; 106 char opio_buf[BUFSIZE]; 107 int fd, optnode; 108 109 if ((fd = open(path_openprom, arg ? O_RDWR : O_RDONLY, 0640)) < 0) 110 BARF(path_openprom, strerror(errno)); 111 112 /* Check to see if it's a special-case keyword. */ 113 for (ex = opextab; ex->ex_keyword != NULL; ++ex) 114 if (strcmp(ex->ex_keyword, keyword) == 0) 115 break; 116 117 if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0) { 118 (void)close(fd); 119 BARF("OPIOCGETOPTNODE", strerror(errno)); 120 } 121 122 memset(&opio_buf[0], 0, sizeof(opio_buf)); 123 memset(&opio, 0, sizeof(opio)); 124 opio.op_nodeid = optnode; 125 opio.op_name = keyword; 126 opio.op_namelen = strlen(opio.op_name); 127 128 if (arg) { 129 if (verbose) { 130 printf("old: "); 131 132 opio.op_buf = &opio_buf[0]; 133 opio.op_buflen = sizeof(opio_buf); 134 if (ioctl(fd, OPIOCGET, (char *)&opio) < 0) { 135 (void)close(fd); 136 BARF("OPIOCGET", strerror(errno)); 137 } 138 139 if (opio.op_buflen <= 0) { 140 printf("nothing available for %s\n", keyword); 141 goto out; 142 } 143 144 if (ex->ex_keyword != NULL) 145 (*ex->ex_handler)(ex, &opio, NULL); 146 else 147 printf("%s\n", opio.op_buf); 148 } 149 out: 150 if (ex->ex_keyword != NULL) 151 (*ex->ex_handler)(ex, &opio, arg); 152 else { 153 opio.op_buf = arg; 154 opio.op_buflen = strlen(arg); 155 } 156 157 if (ioctl(fd, OPIOCSET, (char *)&opio) < 0) { 158 (void)close(fd); 159 BARF("invalid keyword", keyword); 160 } 161 162 if (verbose) { 163 printf("new: "); 164 if (ex->ex_keyword != NULL) 165 (*ex->ex_handler)(ex, &opio, NULL); 166 else 167 printf("%s\n", opio.op_buf); 168 } 169 } else { 170 opio.op_buf = &opio_buf[0]; 171 opio.op_buflen = sizeof(opio_buf); 172 if (ioctl(fd, OPIOCGET, (char *)&opio) < 0) { 173 (void)close(fd); 174 BARF("OPIOCGET", strerror(errno)); 175 } 176 177 if (opio.op_buflen <= 0) { 178 (void)snprintf(err_str, sizeof err_str, 179 "nothing available for %s", keyword); 180 return (err_str); 181 } 182 183 if (ex->ex_keyword != NULL) 184 (*ex->ex_handler)(ex, &opio, NULL); 185 else 186 printf("%s=%s\n", keyword, opio.op_buf); 187 } 188 189 (void)close(fd); 190 return (NULL); 191 } 192 193 /* ARGSUSED */ 194 static void 195 op_notsupp(exent, opiop, arg) 196 struct extabent *exent; 197 struct opiocdesc *opiop; 198 char *arg; 199 { 200 201 warnx("property `%s' not yet supported", exent->ex_keyword); 202 } 203 204 /* 205 * XXX: This code is quite ugly. You have been warned. 206 * (Really! This is the only way I could get it to work!) 207 */ 208 void 209 op_dump() 210 { 211 struct opiocdesc opio1, opio2; 212 struct extabent *ex; 213 char buf1[BUFSIZE], buf2[BUFSIZE], buf3[BUFSIZE], buf4[BUFSIZE]; 214 int fd, optnode; 215 216 if ((fd = open(path_openprom, O_RDONLY, 0640)) < 0) 217 err(1, "open: %s", path_openprom); 218 219 if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0) 220 err(1, "OPIOCGETOPTNODE"); 221 222 memset(&opio1, 0, sizeof(opio1)); 223 224 /* This will grab the first property name from OPIOCNEXTPROP. */ 225 memset(buf1, 0, sizeof(buf1)); 226 memset(buf2, 0, sizeof(buf2)); 227 228 opio1.op_nodeid = opio2.op_nodeid = optnode; 229 230 opio1.op_name = buf1; 231 opio1.op_buf = buf2; 232 233 opio2.op_name = buf3; 234 opio2.op_buf = buf4; 235 236 /* 237 * For reference: opio1 is for obtaining the name. Pass the 238 * name of the last property read in op_name, and the next one 239 * will be returned in op_buf. To get the first name, pass 240 * an empty string. There are no more properties when an 241 * empty string is returned. 242 * 243 * opio2 is for obtaining the value associated with that name. 244 * For some crazy reason, it seems as if we need to do all 245 * of that gratuitious zapping and copying. *sigh* 246 */ 247 for (;;) { 248 opio1.op_namelen = strlen(opio1.op_name); 249 opio1.op_buflen = sizeof(buf2); 250 251 if (ioctl(fd, OPIOCNEXTPROP, (char *)&opio1) < 0) 252 err(1, "ioctl: OPIOCNEXTPROP"); 253 254 /* 255 * The name of the property we wish to get the 256 * value for has been stored in the value field 257 * of opio1. If the length of the name is 0, there 258 * are no more properties left. 259 */ 260 strcpy(opio2.op_name, opio1.op_buf); /* XXX strcpy is safe */ 261 opio2.op_namelen = strlen(opio2.op_name); 262 263 if (opio2.op_namelen == 0) { 264 (void)close(fd); 265 return; 266 } 267 268 memset(opio2.op_buf, 0, sizeof(buf4)); 269 opio2.op_buflen = sizeof(buf4); 270 271 if (ioctl(fd, OPIOCGET, (char *)&opio2) < 0) 272 err(1, "ioctl: OPIOCGET"); 273 274 for (ex = opextab; ex->ex_keyword != NULL; ++ex) 275 if (strcmp(ex->ex_keyword, opio2.op_name) == 0) 276 break; 277 278 if (ex->ex_keyword != NULL) 279 (*ex->ex_handler)(ex, &opio2, NULL); 280 else 281 printf("%s=%s\n", opio2.op_name, opio2.op_buf); 282 283 /* 284 * Place the name of the last read value back into 285 * opio1 so that we may obtain the next name. 286 */ 287 memset(opio1.op_name, 0, sizeof(buf1)); 288 memset(opio1.op_buf, 0, sizeof(buf2)); 289 strcpy(opio1.op_name, opio2.op_name); /* XXX strcpy is safe */ 290 } 291 /* NOTREACHED */ 292 } 293