1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/types.h> 33 34#include <ctype.h> 35#include <err.h> 36#include <errno.h> 37#include <float.h> 38#include <stdio.h> 39#include <stdlib.h> 40#include <string.h> 41#include <unistd.h> 42 43#include "hexdump.h" 44 45#define PADDING " " 46 47int odmode; 48 49static void odadd(const char *); 50static void odformat(const char *); 51static const char *odformatfp(char, const char *); 52static const char *odformatint(char, const char *); 53static void odoffset(int, char ***); 54static void odusage(void); 55 56void 57oldsyntax(int argc, char ***argvp) 58{ 59 static char empty[] = "", padding[] = PADDING; 60 int ch; 61 char **argv, *end; 62 63 /* Add initial (default) address format. -A may change it later. */ 64#define TYPE_OFFSET 7 65 add("\"%07.7_Ao\n\""); 66 add("\"%07.7_ao \""); 67 68 odmode = 1; 69 argv = *argvp; 70 while ((ch = getopt(argc, argv, "A:aBbcDdeFfHhIij:LlN:Oost:vXx")) != -1) 71 switch (ch) { 72 case 'A': 73 switch (*optarg) { 74 case 'd': case 'o': case 'x': 75 fshead->nextfu->fmt[TYPE_OFFSET] = *optarg; 76 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 77 *optarg; 78 break; 79 case 'n': 80 fshead->nextfu->fmt = empty; 81 fshead->nextfs->nextfu->fmt = padding; 82 break; 83 default: 84 errx(1, "%s: invalid address base", optarg); 85 } 86 break; 87 case 'a': 88 odformat("a"); 89 break; 90 case 'B': 91 case 'o': 92 odformat("o2"); 93 break; 94 case 'b': 95 odformat("o1"); 96 break; 97 case 'c': 98 odformat("c"); 99 break; 100 case 'd': 101 odformat("u2"); 102 break; 103 case 'D': 104 odformat("u4"); 105 break; 106 case 'e': /* undocumented in od */ 107 case 'F': 108 odformat("fD"); 109 break; 110 case 'f': 111 odformat("fF"); 112 break; 113 case 'H': 114 case 'X': 115 odformat("x4"); 116 break; 117 case 'h': 118 case 'x': 119 odformat("x2"); 120 break; 121 case 'I': 122 case 'L': 123 case 'l': 124 odformat("dL"); 125 break; 126 case 'i': 127 odformat("dI"); 128 break; 129 case 'j': 130 errno = 0; 131 skip = strtoll(optarg, &end, 0); 132 if (*end == 'b') 133 skip *= 512; 134 else if (*end == 'k') 135 skip *= 1024; 136 else if (*end == 'm') 137 skip *= 1048576L; 138 if (errno != 0 || skip < 0 || strlen(end) > 1) 139 errx(1, "%s: invalid skip amount", optarg); 140 break; 141 case 'N': 142 if ((length = atoi(optarg)) <= 0) 143 errx(1, "%s: invalid length", optarg); 144 break; 145 case 'O': 146 odformat("o4"); 147 break; 148 case 's': 149 odformat("d2"); 150 break; 151 case 't': 152 odformat(optarg); 153 break; 154 case 'v': 155 vflag = ALL; 156 break; 157 case '?': 158 default: 159 odusage(); 160 } 161 162 if (fshead->nextfs->nextfs == NULL) 163 odformat("oS"); 164 165 argc -= optind; 166 *argvp += optind; 167 168 if (argc) 169 odoffset(argc, argvp); 170} 171 172static void 173odusage(void) 174{ 175 176 fprintf(stderr, 177"usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n"); 178 fprintf(stderr, 179" [[+]offset[.][Bb]] [file ...]\n"); 180 exit(1); 181} 182 183static void 184odoffset(int argc, char ***argvp) 185{ 186 char *p, *num, *end; 187 int base; 188 189 /* 190 * The offset syntax of od(1) was genuinely bizarre. First, if 191 * it started with a plus it had to be an offset. Otherwise, if 192 * there were at least two arguments, a number or lower-case 'x' 193 * followed by a number makes it an offset. By default it was 194 * octal; if it started with 'x' or '0x' it was hex. If it ended 195 * in a '.', it was decimal. If a 'b' or 'B' was appended, it 196 * multiplied the number by 512 or 1024 byte units. There was 197 * no way to assign a block count to a hex offset. 198 * 199 * We assume it's a file if the offset is bad. 200 */ 201 p = argc == 1 ? (*argvp)[0] : (*argvp)[1]; 202 203 if (*p != '+' && (argc < 2 || 204 (!isdigit(p[0]) && (p[0] != 'x' || !isxdigit(p[1]))))) 205 return; 206 207 base = 0; 208 /* 209 * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and 210 * set base. 211 */ 212 if (p[0] == '+') 213 ++p; 214 if (p[0] == 'x' && isxdigit(p[1])) { 215 ++p; 216 base = 16; 217 } else if (p[0] == '0' && p[1] == 'x') { 218 p += 2; 219 base = 16; 220 } 221 222 /* skip over the number */ 223 if (base == 16) 224 for (num = p; isxdigit(*p); ++p); 225 else 226 for (num = p; isdigit(*p); ++p); 227 228 /* check for no number */ 229 if (num == p) 230 return; 231 232 /* if terminates with a '.', base is decimal */ 233 if (*p == '.') { 234 if (base) 235 return; 236 base = 10; 237 } 238 239 skip = strtoll(num, &end, base ? base : 8); 240 241 /* if end isn't the same as p, we got a non-octal digit */ 242 if (end != p) { 243 skip = 0; 244 return; 245 } 246 247 if (*p) { 248 if (*p == 'B') { 249 skip *= 1024; 250 ++p; 251 } else if (*p == 'b') { 252 skip *= 512; 253 ++p; 254 } 255 } 256 257 if (*p) { 258 skip = 0; 259 return; 260 } 261 262 /* 263 * If the offset uses a non-octal base, the base of the offset 264 * is changed as well. This isn't pretty, but it's easy. 265 */ 266 if (base == 16) { 267 fshead->nextfu->fmt[TYPE_OFFSET] = 'x'; 268 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x'; 269 } else if (base == 10) { 270 fshead->nextfu->fmt[TYPE_OFFSET] = 'd'; 271 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd'; 272 } 273 274 /* Terminate file list. */ 275 (*argvp)[1] = NULL; 276} 277 278static void 279odformat(const char *fmt) 280{ 281 char fchar; 282 283 while (*fmt != '\0') { 284 switch ((fchar = *fmt++)) { 285 case 'a': 286 odadd("16/1 \"%3_u \" \"\\n\""); 287 break; 288 case 'c': 289 odadd("16/1 \"%3_c \" \"\\n\""); 290 break; 291 case 'o': case 'u': case 'd': case 'x': 292 fmt = odformatint(fchar, fmt); 293 break; 294 case 'f': 295 fmt = odformatfp(fchar, fmt); 296 break; 297 default: 298 errx(1, "%c: unrecognised format character", fchar); 299 } 300 } 301} 302 303static const char * 304odformatfp(char fchar __unused, const char *fmt) 305{ 306 size_t isize; 307 int digits; 308 char *end, *hdfmt; 309 310 isize = sizeof(double); 311 switch (*fmt) { 312 case 'F': 313 isize = sizeof(float); 314 fmt++; 315 break; 316 case 'D': 317 isize = sizeof(double); 318 fmt++; 319 break; 320 case 'L': 321 isize = sizeof(long double); 322 fmt++; 323 break; 324 default: 325 if (isdigit((unsigned char)*fmt)) { 326 errno = 0; 327 isize = (size_t)strtoul(fmt, &end, 10); 328 if (errno != 0 || isize == 0) 329 errx(1, "%s: invalid size", fmt); 330 fmt = (const char *)end; 331 } 332 } 333 switch (isize) { 334 case sizeof(float): 335 digits = FLT_DIG; 336 break; 337 case sizeof(double): 338 digits = DBL_DIG; 339 break; 340 default: 341 if (isize == sizeof(long double)) 342 digits = LDBL_DIG; 343 else 344 errx(1, "unsupported floating point size %lu", 345 (u_long)isize); 346 } 347 348 asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"", 349 16UL / (u_long)isize, (u_long)isize, digits + 8, digits); 350 if (hdfmt == NULL) 351 err(1, NULL); 352 odadd(hdfmt); 353 free(hdfmt); 354 355 return (fmt); 356} 357 358static const char * 359odformatint(char fchar, const char *fmt) 360{ 361 unsigned long long n; 362 size_t isize; 363 int digits; 364 char *end, *hdfmt; 365 366 isize = sizeof(int); 367 switch (*fmt) { 368 case 'C': 369 isize = sizeof(char); 370 fmt++; 371 break; 372 case 'I': 373 isize = sizeof(int); 374 fmt++; 375 break; 376 case 'L': 377 isize = sizeof(long); 378 fmt++; 379 break; 380 case 'S': 381 isize = sizeof(short); 382 fmt++; 383 break; 384 default: 385 if (isdigit((unsigned char)*fmt)) { 386 errno = 0; 387 isize = (size_t)strtoul(fmt, &end, 10); 388 if (errno != 0 || isize == 0) 389 errx(1, "%s: invalid size", fmt); 390 if (isize != sizeof(char) && isize != sizeof(short) && 391 isize != sizeof(int) && isize != sizeof(long)) 392 errx(1, "unsupported int size %lu", 393 (u_long)isize); 394 fmt = (const char *)end; 395 } 396 } 397 398 /* 399 * Calculate the maximum number of digits we need to 400 * fit the number. Overestimate for decimal with log 401 * base 8. We need one extra space for signed numbers 402 * to store the sign. 403 */ 404 n = (1ULL << (8 * isize)) - 1; 405 digits = 0; 406 while (n != 0) { 407 digits++; 408 n >>= (fchar == 'x') ? 4 : 3; 409 } 410 if (fchar == 'd') 411 digits++; 412 asprintf(&hdfmt, "%lu/%lu \"%*s%%%s%d%c\" \"\\n\"", 413 16UL / (u_long)isize, (u_long)isize, (int)(4 * isize - digits), 414 "", (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar); 415 if (hdfmt == NULL) 416 err(1, NULL); 417 odadd(hdfmt); 418 free(hdfmt); 419 420 return (fmt); 421} 422 423static void 424odadd(const char *fmt) 425{ 426 static int needpad; 427 428 if (needpad) 429 add("\""PADDING"\""); 430 add(fmt); 431 needpad = 1; 432} 433