1/*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35#if 0 36static char sccsid[] = "@(#)odsyntax.c 8.2 (Berkeley) 5/4/95"; 37#endif 38#endif /* not lint */ 39#include <sys/cdefs.h> 40__FBSDID("$FreeBSD: src/usr.bin/hexdump/odsyntax.c,v 1.16 2002/09/04 23:29:01 dwmalone Exp $"); 41 42#include <sys/types.h> 43 44#include <ctype.h> 45#include <err.h> 46#include <errno.h> 47#include <float.h> 48#include <stdio.h> 49#include <stdlib.h> 50#include <string.h> 51#include <unistd.h> 52 53#include "hexdump.h" 54 55#define PADDING " " 56 57int odmode; 58 59static void odadd(const char *); 60static void odformat(const char *); 61static const char *odformatfp(char, const char *); 62static const char *odformatint(char, const char *); 63static void odoffset(int, char ***); 64static void odusage(void); 65 66void 67oldsyntax(int argc, char ***argvp) 68{ 69 static char _n[] = "%_n", padding[] = PADDING; 70 int ch; 71 char **argv, *end; 72 73 /* Add initial (default) address format. -A may change it later. */ 74#define TYPE_OFFSET 7 75 add("\"%07.7_Ao\n\""); 76 add("\"%07.7_ao \""); 77 78 odmode = 1; 79 argv = *argvp; 80 while ((ch = getopt(argc, argv, "A:aBbcDdeFfHhIij:LlN:Oost:vXx")) != -1) 81 switch (ch) { 82 case 'A': 83 switch (*optarg) { 84 case 'd': case 'o': case 'x': 85 fshead->nextfu->fmt[TYPE_OFFSET] = *optarg; 86 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 87 *optarg; 88 break; 89 case 'n': 90 fshead->nextfu->fmt = _n; /* mimic regular output */ 91 fshead->nextfs->nextfu->fmt = padding; 92 break; 93 default: 94 errx(1, "%s: invalid address base", optarg); 95 } 96 break; 97 case 'a': 98 odformat("a"); 99 break; 100 case 'B': 101 case 'o': 102 odformat("o2"); 103 break; 104 case 'b': 105 odformat("o1"); 106 break; 107 case 'c': 108 odformat("c"); 109 break; 110 case 'd': 111 odformat("u2"); 112 break; 113 case 'D': 114 odformat("u4"); 115 break; 116 case 'e': /* undocumented in od */ 117 case 'F': 118 odformat("fD"); 119 break; 120 case 'f': 121 odformat("fF"); 122 break; 123 case 'H': 124 case 'X': 125 odformat("x4"); 126 break; 127 case 'h': 128 case 'x': 129 odformat("x2"); 130 break; 131 case 'I': 132 case 'L': 133 case 'l': 134 odformat("dL"); 135 break; 136 case 'i': 137 odformat("dI"); 138 break; 139 case 'j': 140 errno = 0; 141 skip = strtoll(optarg, &end, 0); 142 if (*end == 'b') 143 skip *= 512; 144 else if (*end == 'k') 145 skip *= 1024; 146 else if (*end == 'm') 147 skip *= 1048576L; 148 else if (*end == 'g') 149 skip *= 1073741824; 150 else if (*end != '\0') 151 skip = -1; 152 if (errno != 0 || skip < 0 || strlen(end) > 1) 153 errx(1, "%s: invalid skip amount", optarg); 154 break; 155 case 'N': 156 if ((length = atoi(optarg)) <= 0) 157 errx(1, "%s: invalid length", optarg); 158 break; 159 case 'O': 160 odformat("o4"); 161 break; 162 case 's': 163 odformat("d2"); 164 break; 165 case 't': 166 odformat(optarg); 167 break; 168 case 'v': 169 vflag = ALL; 170 break; 171 case '?': 172 default: 173 odusage(); 174 } 175 176 if (fshead->nextfs->nextfs == NULL) 177 odformat("oS"); 178 179 argc -= optind; 180 *argvp += optind; 181 182 if (argc) 183 odoffset(argc, argvp); 184} 185 186static void 187odusage(void) 188{ 189 190 fprintf(stderr, 191"usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n"); 192 fprintf(stderr, 193" [[+]offset[.][Bb]] [file ...]\n"); 194 exit(1); 195} 196 197static void 198odoffset(int argc, char ***argvp) 199{ 200 unsigned char *p, *q, *num, *end; 201 int base; 202 203 /* 204 * The offset syntax of od(1) was genuinely bizarre. First, if 205 * it started with a plus it had to be an offset. Otherwise, if 206 * there were at least two arguments, a number or lower-case 'x' 207 * followed by a number makes it an offset. By default it was 208 * octal; if it started with 'x' or '0x' it was hex. If it ended 209 * in a '.', it was decimal. If a 'b' or 'B' was appended, it 210 * multiplied the number by 512 or 1024 byte units. There was 211 * no way to assign a block count to a hex offset. 212 * 213 * We assume it's a file if the offset is bad. 214 */ 215 p = (unsigned char *)(argc == 1 ? (*argvp)[0] : (*argvp)[1]); 216 217 if (*p != '+' && (argc < 2 || 218 (!isdigit(p[0]) && (p[0] != 'x' || !isxdigit(p[1]))))) 219 return; 220 221 base = 0; 222 /* 223 * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and 224 * set base. 225 */ 226 if (p[0] == '+') 227 ++p; 228 if (p[0] == 'x' && isxdigit(p[1])) { 229 ++p; 230 base = 16; 231 } else if (p[0] == '0' && p[1] == 'x') { 232 p += 2; 233 base = 16; 234 } 235 236 /* skip over the number */ 237 if (base == 16) 238 for (num = p; isxdigit(*p); ++p); 239 else 240 for (num = p; isdigit(*p); ++p); 241 242 /* check for no number */ 243 if (num == p) 244 return; 245 q = p; 246 /* if terminates with a '.', base is decimal */ 247 if (*q == '.') { 248 if (base) 249 return; 250 base = 10; 251 q++; 252 } 253 254 skip = strtoll((const char *)num, (char **)&end, base ? base : 8); 255 256 /* if end isn't the same as p, we got a non-octal digit */ 257 if (end != p) { 258 skip = 0; 259 return; 260 } 261 262 if (*q) { 263 if (*q == 'B') { 264 skip *= 1024; 265 ++p; 266 } else if (*q == 'b') { 267 skip *= 512; 268 ++q; 269 } 270 } 271 272 if (*q) { 273 skip = 0; 274 return; 275 } 276 277 /* 278 * If the offset uses a non-octal base, the base of the offset 279 * is changed as well. This isn't pretty, but it's easy. 280 */ 281 if (base == 16) { 282 fshead->nextfu->fmt[TYPE_OFFSET] = 'x'; 283 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x'; 284 } else if (base == 10) { 285 fshead->nextfu->fmt[TYPE_OFFSET] = 'd'; 286 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd'; 287 } 288 289 /* Terminate file list. */ 290 (*argvp)[1] = NULL; 291} 292 293static void 294odformat(const char *fmt) 295{ 296 char fchar; 297 298 while (*fmt != '\0') { 299 switch ((fchar = *fmt++)) { 300 case 'a': 301 odadd("16/1 \"%3_u \" \"\\n\""); 302 break; 303 case 'c': 304 odadd("16/1 \"%3_c \" \"\\n\""); 305 break; 306 case 'o': case 'u': case 'd': case 'x': 307 fmt = odformatint(fchar, fmt); 308 break; 309 case 'f': 310 fmt = odformatfp(fchar, fmt); 311 break; 312 default: 313 errx(1, "%c: unrecognised format character", fchar); 314 } 315 } 316} 317 318static const char * 319odformatfp(char fchar __unused, const char *fmt) 320{ 321 size_t isize; 322 int digits; 323 char *end, *hdfmt; 324 325 isize = sizeof(double); 326 switch (*fmt) { 327 case 'F': 328 isize = sizeof(float); 329 fmt++; 330 break; 331 case 'D': 332 isize = sizeof(double); 333 fmt++; 334 break; 335 case 'L': 336 isize = sizeof(long double); 337 fmt++; 338 break; 339 default: 340 if (isdigit((unsigned char)*fmt)) { 341 errno = 0; 342 isize = (size_t)strtoul(fmt, &end, 10); 343 if (errno != 0 || isize == 0) 344 errx(1, "%s: invalid size", fmt); 345 fmt = (const char *)end; 346 } 347 } 348 switch (isize) { 349 case sizeof(float): 350 digits = FLT_DIG; 351 break; 352 case sizeof(double): 353 digits = DBL_DIG; 354 break; 355 default: 356 if (isize == sizeof(long double)) 357 digits = LDBL_DIG; 358 else 359 errx(1, "unsupported floating point size %lu", 360 (u_long)isize); 361 } 362 363 asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"", 364 16UL / (u_long)isize, (u_long)isize, digits + 8, digits); 365 if (hdfmt == NULL) 366 err(1, NULL); 367 odadd(hdfmt); 368 free(hdfmt); 369 370 return (fmt); 371} 372 373static const char * 374odformatint(char fchar, const char *fmt) 375{ 376 unsigned long long n; 377 size_t isize; 378 int digits; 379 char *end, *hdfmt; 380 381 isize = sizeof(int); 382 switch (*fmt) { 383 case 'C': 384 isize = sizeof(char); 385 fmt++; 386 break; 387 case 'I': 388 isize = sizeof(int); 389 fmt++; 390 break; 391 case 'L': 392 isize = sizeof(long); 393 fmt++; 394 break; 395 case 'S': 396 isize = sizeof(short); 397 fmt++; 398 break; 399 default: 400 if (isdigit((unsigned char)*fmt)) { 401 errno = 0; 402 isize = (size_t)strtoul(fmt, &end, 10); 403 if (errno != 0 || isize == 0) 404 errx(1, "%s: invalid size", fmt); 405 if (isize != sizeof(char) && isize != sizeof(short) && 406 isize != sizeof(int) && isize != sizeof(long)) 407 errx(1, "unsupported int size %lu", 408 (u_long)isize); 409 fmt = (const char *)end; 410 } 411 } 412 413 /* 414 * Calculate the maximum number of digits we need to 415 * fit the number. Overestimate for decimal with log 416 * base 8. We need one extra space for signed numbers 417 * to store the sign. 418 */ 419 n = (1ULL << (8 * isize)) - 1; 420 digits = 0; 421 while (n != 0) { 422 digits++; 423 n >>= (fchar == 'x') ? 4 : 3; 424 } 425 if (fchar == 'd') 426 digits++; 427 asprintf(&hdfmt, "%lu/%lu \"%*s%%%s%d%c\" \"\\n\"", 428 16UL / (u_long)isize, (u_long)isize, (int)(4 * isize - digits), 429 "", (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar); 430 if (hdfmt == NULL) 431 err(1, NULL); 432 odadd(hdfmt); 433 free(hdfmt); 434 435 return (fmt); 436} 437 438static void 439odadd(const char *fmt) 440{ 441 static int needpad; 442 443 if (needpad) 444 add("\""PADDING"\""); 445 add(fmt); 446 needpad = 1; 447} 448