1 /* $NetBSD: ophandlers.c,v 1.13 2013/07/02 11:59:46 joerg 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 (const 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 const 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(char *keyword, char *arg) 73 { 74 char *cp; 75 76 if ((cp = op_handler(keyword, arg)) != NULL) 77 warnx("%s", cp); 78 return; 79 } 80 81 int 82 check_for_openprom(void) 83 { 84 int fd, rv, optnode; 85 86 /* if we can't open it, obviously we can't use it. */ 87 if ((fd = open(path_openprom, O_RDONLY)) < 0) 88 return (0); 89 90 /* check for the presence of OpenFirmware with OPIOCGETOPTNODE */ 91 rv = ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode); 92 close (fd); 93 94 return (rv == 0); 95 } 96 97 char * 98 op_handler(char *keyword, char *arg) 99 { 100 struct opiocdesc opio; 101 const struct extabent *ex; 102 char opio_buf[BUFSIZE]; 103 int fd, optnode; 104 105 if ((fd = open(path_openprom, arg ? O_RDWR : O_RDONLY, 0640)) < 0) 106 BARF(path_openprom, strerror(errno)); 107 108 /* Check to see if it's a special-case keyword. */ 109 for (ex = opextab; ex->ex_keyword != NULL; ++ex) 110 if (strcmp(ex->ex_keyword, keyword) == 0) 111 break; 112 113 if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0) { 114 (void)close(fd); 115 BARF("OPIOCGETOPTNODE", strerror(errno)); 116 } 117 118 memset(&opio_buf[0], 0, sizeof(opio_buf)); 119 memset(&opio, 0, sizeof(opio)); 120 opio.op_nodeid = optnode; 121 opio.op_name = keyword; 122 opio.op_namelen = strlen(opio.op_name); 123 124 if (arg) { 125 if (verbose) { 126 printf("old: "); 127 128 opio.op_buf = &opio_buf[0]; 129 opio.op_buflen = sizeof(opio_buf); 130 if (ioctl(fd, OPIOCGET, (char *)&opio) < 0) { 131 (void)close(fd); 132 BARF("OPIOCGET", strerror(errno)); 133 } 134 135 if (opio.op_buflen <= 0) { 136 printf("nothing available for %s\n", keyword); 137 goto out; 138 } 139 140 if (ex->ex_keyword != NULL) 141 (*ex->ex_handler)(ex, &opio, NULL); 142 else 143 printf("%s\n", opio.op_buf); 144 } 145 out: 146 if (ex->ex_keyword != NULL) 147 (*ex->ex_handler)(ex, &opio, arg); 148 else { 149 opio.op_buf = arg; 150 opio.op_buflen = strlen(arg); 151 } 152 153 if (ioctl(fd, OPIOCSET, (char *)&opio) < 0) { 154 (void)close(fd); 155 BARF("invalid keyword", keyword); 156 } 157 158 if (verbose) { 159 printf("new: "); 160 if (ex->ex_keyword != NULL) 161 (*ex->ex_handler)(ex, &opio, NULL); 162 else 163 printf("%s\n", opio.op_buf); 164 } 165 } else { 166 opio.op_buf = &opio_buf[0]; 167 opio.op_buflen = sizeof(opio_buf); 168 if (ioctl(fd, OPIOCGET, (char *)&opio) < 0) { 169 (void)close(fd); 170 BARF("OPIOCGET", strerror(errno)); 171 } 172 173 if (opio.op_buflen <= 0) { 174 (void)snprintf(err_str, sizeof err_str, 175 "nothing available for %s", keyword); 176 return (err_str); 177 } 178 179 if (ex->ex_keyword != NULL) 180 (*ex->ex_handler)(ex, &opio, NULL); 181 else 182 printf("%s=%s\n", keyword, opio.op_buf); 183 } 184 185 (void)close(fd); 186 return (NULL); 187 } 188 189 /* ARGSUSED */ 190 static void 191 op_notsupp(const struct extabent *exent, struct opiocdesc *opiop, char *arg) 192 { 193 194 warnx("property `%s' not yet supported", exent->ex_keyword); 195 } 196 197 /* 198 * XXX: This code is quite ugly. You have been warned. 199 * (Really! This is the only way I could get it to work!) 200 */ 201 void 202 op_dump(void) 203 { 204 struct opiocdesc opio1, opio2; 205 const struct extabent *ex; 206 char buf1[BUFSIZE], buf2[BUFSIZE], buf3[BUFSIZE], buf4[BUFSIZE]; 207 int fd, optnode; 208 209 if ((fd = open(path_openprom, O_RDONLY, 0640)) < 0) 210 err(1, "open: %s", path_openprom); 211 212 if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0) 213 err(1, "OPIOCGETOPTNODE"); 214 215 memset(&opio1, 0, sizeof(opio1)); 216 217 /* This will grab the first property name from OPIOCNEXTPROP. */ 218 memset(buf1, 0, sizeof(buf1)); 219 memset(buf2, 0, sizeof(buf2)); 220 221 opio1.op_nodeid = opio2.op_nodeid = optnode; 222 223 opio1.op_name = buf1; 224 opio1.op_buf = buf2; 225 226 opio2.op_name = buf3; 227 opio2.op_buf = buf4; 228 229 /* 230 * For reference: opio1 is for obtaining the name. Pass the 231 * name of the last property read in op_name, and the next one 232 * will be returned in op_buf. To get the first name, pass 233 * an empty string. There are no more properties when an 234 * empty string is returned. 235 * 236 * opio2 is for obtaining the value associated with that name. 237 * For some crazy reason, it seems as if we need to do all 238 * of that gratuitious zapping and copying. *sigh* 239 */ 240 for (;;) { 241 opio1.op_namelen = strlen(opio1.op_name); 242 opio1.op_buflen = sizeof(buf2); 243 244 if (ioctl(fd, OPIOCNEXTPROP, (char *)&opio1) < 0) 245 err(1, "ioctl: OPIOCNEXTPROP"); 246 247 /* 248 * The name of the property we wish to get the 249 * value for has been stored in the value field 250 * of opio1. If the length of the name is 0, there 251 * are no more properties left. 252 */ 253 strcpy(opio2.op_name, opio1.op_buf); /* XXX strcpy is safe */ 254 opio2.op_namelen = strlen(opio2.op_name); 255 256 if (opio2.op_namelen == 0) { 257 (void)close(fd); 258 return; 259 } 260 261 memset(opio2.op_buf, 0, sizeof(buf4)); 262 opio2.op_buflen = sizeof(buf4); 263 264 if (ioctl(fd, OPIOCGET, (char *)&opio2) < 0) 265 err(1, "ioctl: OPIOCGET"); 266 267 for (ex = opextab; ex->ex_keyword != NULL; ++ex) 268 if (strcmp(ex->ex_keyword, opio2.op_name) == 0) 269 break; 270 271 if (ex->ex_keyword != NULL) 272 (*ex->ex_handler)(ex, &opio2, NULL); 273 else 274 printf("%s=%s\n", opio2.op_name, opio2.op_buf); 275 276 /* 277 * Place the name of the last read value back into 278 * opio1 so that we may obtain the next name. 279 */ 280 memset(opio1.op_name, 0, sizeof(buf1)); 281 memset(opio1.op_buf, 0, sizeof(buf2)); 282 strcpy(opio1.op_name, opio2.op_name); /* XXX strcpy is safe */ 283 } 284 /* NOTREACHED */ 285 } 286