1 /* 2 * Copyright (c) 1989, 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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 #if 0 32 static char sccsid[] = "@(#)display.c 8.1 (Berkeley) 6/6/93"; 33 #endif 34 #endif /* not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 #include <sys/stat.h> 40 41 #include <ctype.h> 42 #include <err.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include "hexdump.h" 48 49 enum _vflag vflag = FIRST; 50 51 static off_t address; /* address/offset in stream */ 52 static off_t eaddress; /* end address */ 53 54 static void print(PR *, u_char *); 55 56 void 57 display(void) 58 { 59 FS *fs; 60 FU *fu; 61 PR *pr; 62 int cnt; 63 u_char *bp; 64 off_t saveaddress; 65 u_char savech, *savebp; 66 67 savech = 0; 68 while ((bp = get())) 69 for (fs = fshead, savebp = bp, saveaddress = address; fs; 70 fs = fs->nextfs, bp = savebp, address = saveaddress) 71 for (fu = fs->nextfu; fu; fu = fu->nextfu) { 72 if (fu->flags&F_IGNORE) 73 break; 74 for (cnt = fu->reps; cnt; --cnt) 75 for (pr = fu->nextpr; pr; address += pr->bcnt, 76 bp += pr->bcnt, pr = pr->nextpr) { 77 if (eaddress && address >= eaddress && 78 !(pr->flags & (F_TEXT|F_BPAD))) 79 bpad(pr); 80 if (cnt == 1 && pr->nospace) { 81 savech = *pr->nospace; 82 *pr->nospace = '\0'; 83 } 84 print(pr, bp); 85 if (cnt == 1 && pr->nospace) 86 *pr->nospace = savech; 87 } 88 } 89 if (endfu) { 90 /* 91 * If eaddress not set, error or file size was multiple of 92 * blocksize, and no partial block ever found. 93 */ 94 if (!eaddress) { 95 if (!address) 96 return; 97 eaddress = address; 98 } 99 for (pr = endfu->nextpr; pr; pr = pr->nextpr) 100 switch(pr->flags) { 101 case F_ADDRESS: 102 (void)printf(pr->fmt, (quad_t)eaddress); 103 break; 104 case F_TEXT: 105 (void)printf("%s", pr->fmt); 106 break; 107 } 108 } 109 } 110 111 static void 112 print(PR *pr, u_char *bp) 113 { 114 long double ldbl; 115 double f8; 116 float f4; 117 int16_t s2; 118 int8_t s8; 119 int32_t s4; 120 u_int16_t u2; 121 u_int32_t u4; 122 u_int64_t u8; 123 124 switch(pr->flags) { 125 case F_ADDRESS: 126 (void)printf(pr->fmt, (quad_t)address); 127 break; 128 case F_BPAD: 129 (void)printf(pr->fmt, ""); 130 break; 131 case F_C: 132 conv_c(pr, bp, eaddress ? eaddress - address : 133 blocksize - address % blocksize); 134 break; 135 case F_CHAR: 136 (void)printf(pr->fmt, *bp); 137 break; 138 case F_DBL: 139 switch(pr->bcnt) { 140 case 4: 141 bcopy(bp, &f4, sizeof(f4)); 142 (void)printf(pr->fmt, f4); 143 break; 144 case 8: 145 bcopy(bp, &f8, sizeof(f8)); 146 (void)printf(pr->fmt, f8); 147 break; 148 default: 149 if (pr->bcnt == sizeof(long double)) { 150 bcopy(bp, &ldbl, sizeof(ldbl)); 151 (void)printf(pr->fmt, ldbl); 152 } 153 break; 154 } 155 break; 156 case F_INT: 157 switch(pr->bcnt) { 158 case 1: 159 (void)printf(pr->fmt, (quad_t)(signed char)*bp); 160 break; 161 case 2: 162 bcopy(bp, &s2, sizeof(s2)); 163 (void)printf(pr->fmt, (quad_t)s2); 164 break; 165 case 4: 166 bcopy(bp, &s4, sizeof(s4)); 167 (void)printf(pr->fmt, (quad_t)s4); 168 break; 169 case 8: 170 bcopy(bp, &s8, sizeof(s8)); 171 (void)printf(pr->fmt, s8); 172 break; 173 } 174 break; 175 case F_P: 176 (void)printf(pr->fmt, isprint(*bp) ? *bp : '.'); 177 break; 178 case F_STR: 179 (void)printf(pr->fmt, (char *)bp); 180 break; 181 case F_TEXT: 182 (void)printf("%s", pr->fmt); 183 break; 184 case F_U: 185 conv_u(pr, bp); 186 break; 187 case F_UINT: 188 switch(pr->bcnt) { 189 case 1: 190 (void)printf(pr->fmt, (u_quad_t)*bp); 191 break; 192 case 2: 193 bcopy(bp, &u2, sizeof(u2)); 194 (void)printf(pr->fmt, (u_quad_t)u2); 195 break; 196 case 4: 197 bcopy(bp, &u4, sizeof(u4)); 198 (void)printf(pr->fmt, (u_quad_t)u4); 199 break; 200 case 8: 201 bcopy(bp, &u8, sizeof(u8)); 202 (void)printf(pr->fmt, u8); 203 break; 204 } 205 break; 206 } 207 } 208 209 void 210 bpad(PR *pr) 211 { 212 static char const *spec = " -0+#"; 213 char *p1, *p2; 214 215 /* 216 * Remove all conversion flags; '-' is the only one valid 217 * with %s, and it's not useful here. 218 */ 219 pr->flags = F_BPAD; 220 pr->cchar[0] = 's'; 221 pr->cchar[1] = '\0'; 222 for (p1 = pr->fmt; *p1 != '%'; ++p1); 223 for (p2 = ++p1; *p1 && strchr(spec, *p1); ++p1); 224 while ((*p2++ = *p1++)); 225 } 226 227 static char **_argv; 228 229 u_char * 230 get(void) 231 { 232 static int ateof = 1; 233 static u_char *curp, *savp; 234 int n; 235 int need, nread; 236 int valid_save = 0; 237 u_char *tmpp; 238 239 if (!curp) { 240 if ((curp = calloc(1, blocksize)) == NULL) 241 err(1, NULL); 242 if ((savp = calloc(1, blocksize)) == NULL) 243 err(1, NULL); 244 } else { 245 tmpp = curp; 246 curp = savp; 247 savp = tmpp; 248 address += blocksize; 249 valid_save = 1; 250 } 251 for (need = blocksize, nread = 0;;) { 252 /* 253 * if read the right number of bytes, or at EOF for one file, 254 * and no other files are available, zero-pad the rest of the 255 * block and set the end flag. 256 */ 257 if (!length || (ateof && !next((char **)NULL))) { 258 if (odmode && address < skip) 259 errx(1, "cannot skip past end of input"); 260 if (need == blocksize) 261 return((u_char *)NULL); 262 /* 263 * XXX bcmp() is not quite right in the presence 264 * of multibyte characters. 265 */ 266 if (vflag != ALL && 267 valid_save && 268 bcmp(curp, savp, nread) == 0) { 269 if (vflag != DUP) 270 (void)printf("*\n"); 271 return((u_char *)NULL); 272 } 273 bzero((char *)curp + nread, need); 274 eaddress = address + nread; 275 return(curp); 276 } 277 n = fread((char *)curp + nread, sizeof(u_char), 278 length == -1 ? need : MIN(length, need), stdin); 279 if (!n) { 280 if (ferror(stdin)) 281 warn("%s", _argv[-1]); 282 ateof = 1; 283 continue; 284 } 285 ateof = 0; 286 if (length != -1) 287 length -= n; 288 if (!(need -= n)) { 289 /* 290 * XXX bcmp() is not quite right in the presence 291 * of multibyte characters. 292 */ 293 if (vflag == ALL || vflag == FIRST || 294 valid_save == 0 || 295 bcmp(curp, savp, blocksize) != 0) { 296 if (vflag == DUP || vflag == FIRST) 297 vflag = WAIT; 298 return(curp); 299 } 300 if (vflag == WAIT) 301 (void)printf("*\n"); 302 vflag = DUP; 303 address += blocksize; 304 need = blocksize; 305 nread = 0; 306 } 307 else 308 nread += n; 309 } 310 } 311 312 size_t 313 peek(u_char *buf, size_t nbytes) 314 { 315 size_t n, nread; 316 int c; 317 318 if (length != -1 && nbytes > (unsigned int)length) 319 nbytes = length; 320 nread = 0; 321 while (nread < nbytes && (c = getchar()) != EOF) { 322 *buf++ = c; 323 nread++; 324 } 325 n = nread; 326 while (n-- > 0) { 327 c = *--buf; 328 ungetc(c, stdin); 329 } 330 return (nread); 331 } 332 333 int 334 next(char **argv) 335 { 336 static int done; 337 int statok; 338 339 if (argv) { 340 _argv = argv; 341 return(1); 342 } 343 for (;;) { 344 if (*_argv) { 345 done = 1; 346 if (!(freopen(*_argv, "r", stdin))) { 347 warn("%s", *_argv); 348 exitval = 1; 349 ++_argv; 350 continue; 351 } 352 statok = 1; 353 } else { 354 if (done++) 355 return(0); 356 statok = 0; 357 } 358 if (skip) 359 doskip(statok ? *_argv : "stdin", statok); 360 if (*_argv) 361 ++_argv; 362 if (!skip) 363 return(1); 364 } 365 /* NOTREACHED */ 366 } 367 368 void 369 doskip(const char *fname, int statok) 370 { 371 int cnt; 372 struct stat sb; 373 374 if (statok) { 375 if (fstat(fileno(stdin), &sb)) 376 err(1, "%s", fname); 377 if (S_ISREG(sb.st_mode) && skip > sb.st_size) { 378 address += sb.st_size; 379 skip -= sb.st_size; 380 return; 381 } 382 } 383 if (statok && S_ISREG(sb.st_mode)) { 384 if (fseeko(stdin, skip, SEEK_SET)) 385 err(1, "%s", fname); 386 address += skip; 387 skip = 0; 388 } else { 389 for (cnt = 0; cnt < skip; ++cnt) 390 if (getchar() == EOF) 391 break; 392 address += cnt; 393 skip -= cnt; 394 } 395 } 396