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 #ifndef lint 33 #if 0 34 static char sccsid[] = "@(#)odsyntax.c 8.2 (Berkeley) 5/4/95"; 35 #endif 36 #endif /* not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/types.h> 41 42 #include <ctype.h> 43 #include <err.h> 44 #include <errno.h> 45 #include <float.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 #include "hexdump.h" 52 53 #define PADDING " " 54 55 int odmode; 56 57 static void odadd(const char *); 58 static void odformat(const char *); 59 static const char *odformatfp(char, const char *); 60 static const char *odformatint(char, const char *); 61 static void odoffset(int, char ***); 62 static void odusage(void); 63 64 void 65 oldsyntax(int argc, char ***argvp) 66 { 67 static char empty[] = "", padding[] = PADDING; 68 int ch; 69 char **argv, *end; 70 71 /* Add initial (default) address format. -A may change it later. */ 72 #define TYPE_OFFSET 7 73 add("\"%07.7_Ao\n\""); 74 add("\"%07.7_ao \""); 75 76 odmode = 1; 77 argv = *argvp; 78 while ((ch = getopt(argc, argv, "A:aBbcDdeFfHhIij:LlN:Oost:vXx")) != -1) 79 switch (ch) { 80 case 'A': 81 switch (*optarg) { 82 case 'd': case 'o': case 'x': 83 fshead->nextfu->fmt[TYPE_OFFSET] = *optarg; 84 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 85 *optarg; 86 break; 87 case 'n': 88 fshead->nextfu->fmt = empty; 89 fshead->nextfs->nextfu->fmt = padding; 90 break; 91 default: 92 errx(1, "%s: invalid address base", optarg); 93 } 94 break; 95 case 'a': 96 odformat("a"); 97 break; 98 case 'B': 99 case 'o': 100 odformat("o2"); 101 break; 102 case 'b': 103 odformat("o1"); 104 break; 105 case 'c': 106 odformat("c"); 107 break; 108 case 'd': 109 odformat("u2"); 110 break; 111 case 'D': 112 odformat("u4"); 113 break; 114 case 'e': /* undocumented in od */ 115 case 'F': 116 odformat("fD"); 117 break; 118 case 'f': 119 odformat("fF"); 120 break; 121 case 'H': 122 case 'X': 123 odformat("x4"); 124 break; 125 case 'h': 126 case 'x': 127 odformat("x2"); 128 break; 129 case 'I': 130 case 'L': 131 case 'l': 132 odformat("dL"); 133 break; 134 case 'i': 135 odformat("dI"); 136 break; 137 case 'j': 138 errno = 0; 139 skip = strtoll(optarg, &end, 0); 140 if (*end == 'b') 141 skip *= 512; 142 else if (*end == 'k') 143 skip *= 1024; 144 else if (*end == 'm') 145 skip *= 1048576L; 146 if (errno != 0 || skip < 0 || strlen(end) > 1) 147 errx(1, "%s: invalid skip amount", optarg); 148 break; 149 case 'N': 150 if ((length = atoi(optarg)) <= 0) 151 errx(1, "%s: invalid length", optarg); 152 break; 153 case 'O': 154 odformat("o4"); 155 break; 156 case 's': 157 odformat("d2"); 158 break; 159 case 't': 160 odformat(optarg); 161 break; 162 case 'v': 163 vflag = ALL; 164 break; 165 case '?': 166 default: 167 odusage(); 168 } 169 170 if (fshead->nextfs->nextfs == NULL) 171 odformat("oS"); 172 173 argc -= optind; 174 *argvp += optind; 175 176 if (argc) 177 odoffset(argc, argvp); 178 } 179 180 static void 181 odusage(void) 182 { 183 184 fprintf(stderr, 185 "usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n"); 186 fprintf(stderr, 187 " [[+]offset[.][Bb]] [file ...]\n"); 188 exit(1); 189 } 190 191 static void 192 odoffset(int argc, char ***argvp) 193 { 194 char *p, *num, *end; 195 int base; 196 197 /* 198 * The offset syntax of od(1) was genuinely bizarre. First, if 199 * it started with a plus it had to be an offset. Otherwise, if 200 * there were at least two arguments, a number or lower-case 'x' 201 * followed by a number makes it an offset. By default it was 202 * octal; if it started with 'x' or '0x' it was hex. If it ended 203 * in a '.', it was decimal. If a 'b' or 'B' was appended, it 204 * multiplied the number by 512 or 1024 byte units. There was 205 * no way to assign a block count to a hex offset. 206 * 207 * We assume it's a file if the offset is bad. 208 */ 209 p = argc == 1 ? (*argvp)[0] : (*argvp)[1]; 210 211 if (*p != '+' && (argc < 2 || 212 (!isdigit(p[0]) && (p[0] != 'x' || !isxdigit(p[1]))))) 213 return; 214 215 base = 0; 216 /* 217 * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and 218 * set base. 219 */ 220 if (p[0] == '+') 221 ++p; 222 if (p[0] == 'x' && isxdigit(p[1])) { 223 ++p; 224 base = 16; 225 } else if (p[0] == '0' && p[1] == 'x') { 226 p += 2; 227 base = 16; 228 } 229 230 /* skip over the number */ 231 if (base == 16) 232 for (num = p; isxdigit(*p); ++p); 233 else 234 for (num = p; isdigit(*p); ++p); 235 236 /* check for no number */ 237 if (num == p) 238 return; 239 240 /* if terminates with a '.', base is decimal */ 241 if (*p == '.') { 242 if (base) 243 return; 244 base = 10; 245 } 246 247 skip = strtoll(num, &end, base ? base : 8); 248 249 /* if end isn't the same as p, we got a non-octal digit */ 250 if (end != p) { 251 skip = 0; 252 return; 253 } 254 255 if (*p) { 256 if (*p == 'B') { 257 skip *= 1024; 258 ++p; 259 } else if (*p == 'b') { 260 skip *= 512; 261 ++p; 262 } 263 } 264 265 if (*p) { 266 skip = 0; 267 return; 268 } 269 270 /* 271 * If the offset uses a non-octal base, the base of the offset 272 * is changed as well. This isn't pretty, but it's easy. 273 */ 274 if (base == 16) { 275 fshead->nextfu->fmt[TYPE_OFFSET] = 'x'; 276 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x'; 277 } else if (base == 10) { 278 fshead->nextfu->fmt[TYPE_OFFSET] = 'd'; 279 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd'; 280 } 281 282 /* Terminate file list. */ 283 (*argvp)[1] = NULL; 284 } 285 286 static void 287 odformat(const char *fmt) 288 { 289 char fchar; 290 291 while (*fmt != '\0') { 292 switch ((fchar = *fmt++)) { 293 case 'a': 294 odadd("16/1 \"%3_u \" \"\\n\""); 295 break; 296 case 'c': 297 odadd("16/1 \"%3_c \" \"\\n\""); 298 break; 299 case 'o': case 'u': case 'd': case 'x': 300 fmt = odformatint(fchar, fmt); 301 break; 302 case 'f': 303 fmt = odformatfp(fchar, fmt); 304 break; 305 default: 306 errx(1, "%c: unrecognised format character", fchar); 307 } 308 } 309 } 310 311 static const char * 312 odformatfp(char fchar __unused, const char *fmt) 313 { 314 size_t isize; 315 int digits; 316 char *end, *hdfmt; 317 318 isize = sizeof(double); 319 switch (*fmt) { 320 case 'F': 321 isize = sizeof(float); 322 fmt++; 323 break; 324 case 'D': 325 isize = sizeof(double); 326 fmt++; 327 break; 328 case 'L': 329 isize = sizeof(long double); 330 fmt++; 331 break; 332 default: 333 if (isdigit((unsigned char)*fmt)) { 334 errno = 0; 335 isize = (size_t)strtoul(fmt, &end, 10); 336 if (errno != 0 || isize == 0) 337 errx(1, "%s: invalid size", fmt); 338 fmt = (const char *)end; 339 } 340 } 341 switch (isize) { 342 case sizeof(float): 343 digits = FLT_DIG; 344 break; 345 case sizeof(double): 346 digits = DBL_DIG; 347 break; 348 default: 349 if (isize == sizeof(long double)) 350 digits = LDBL_DIG; 351 else 352 errx(1, "unsupported floating point size %lu", 353 (u_long)isize); 354 } 355 356 asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"", 357 16UL / (u_long)isize, (u_long)isize, digits + 8, digits); 358 if (hdfmt == NULL) 359 err(1, NULL); 360 odadd(hdfmt); 361 free(hdfmt); 362 363 return (fmt); 364 } 365 366 static const char * 367 odformatint(char fchar, const char *fmt) 368 { 369 unsigned long long n; 370 size_t isize; 371 int digits; 372 char *end, *hdfmt; 373 374 isize = sizeof(int); 375 switch (*fmt) { 376 case 'C': 377 isize = sizeof(char); 378 fmt++; 379 break; 380 case 'I': 381 isize = sizeof(int); 382 fmt++; 383 break; 384 case 'L': 385 isize = sizeof(long); 386 fmt++; 387 break; 388 case 'S': 389 isize = sizeof(short); 390 fmt++; 391 break; 392 default: 393 if (isdigit((unsigned char)*fmt)) { 394 errno = 0; 395 isize = (size_t)strtoul(fmt, &end, 10); 396 if (errno != 0 || isize == 0) 397 errx(1, "%s: invalid size", fmt); 398 if (isize != sizeof(char) && isize != sizeof(short) && 399 isize != sizeof(int) && isize != sizeof(long)) 400 errx(1, "unsupported int size %lu", 401 (u_long)isize); 402 fmt = (const char *)end; 403 } 404 } 405 406 /* 407 * Calculate the maximum number of digits we need to 408 * fit the number. Overestimate for decimal with log 409 * base 8. We need one extra space for signed numbers 410 * to store the sign. 411 */ 412 n = (1ULL << (8 * isize)) - 1; 413 digits = 0; 414 while (n != 0) { 415 digits++; 416 n >>= (fchar == 'x') ? 4 : 3; 417 } 418 if (fchar == 'd') 419 digits++; 420 asprintf(&hdfmt, "%lu/%lu \"%*s%%%s%d%c\" \"\\n\"", 421 16UL / (u_long)isize, (u_long)isize, (int)(4 * isize - digits), 422 "", (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar); 423 if (hdfmt == NULL) 424 err(1, NULL); 425 odadd(hdfmt); 426 free(hdfmt); 427 428 return (fmt); 429 } 430 431 static void 432 odadd(const char *fmt) 433 { 434 static int needpad; 435 436 if (needpad) 437 add("\""PADDING"\""); 438 add(fmt); 439 needpad = 1; 440 } 441