[3320] | 1 | /* od -- dump files in octal and other formats
|
---|
| 2 | Copyright (C) 92, 1995-2004 Free Software Foundation, Inc.
|
---|
| 3 |
|
---|
| 4 | This program is free software; you can redistribute it and/or modify
|
---|
| 5 | it under the terms of the GNU General Public License as published by
|
---|
| 6 | the Free Software Foundation; either version 2, or (at your option)
|
---|
| 7 | any later version.
|
---|
| 8 |
|
---|
| 9 | This program is distributed in the hope that it will be useful,
|
---|
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
| 12 | GNU General Public License for more details.
|
---|
| 13 |
|
---|
| 14 | You should have received a copy of the GNU General Public License
|
---|
| 15 | along with this program; if not, write to the Free Software Foundation,
|
---|
| 16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
---|
| 17 |
|
---|
| 18 | /* Written by Jim Meyering. */
|
---|
| 19 |
|
---|
| 20 | /* Busyboxed by Denys Vlasenko
|
---|
| 21 |
|
---|
| 22 | Based on od.c from coreutils-5.2.1
|
---|
| 23 | Top bloat sources:
|
---|
| 24 |
|
---|
| 25 | 00000073 t parse_old_offset
|
---|
| 26 | 0000007b t get_lcm
|
---|
| 27 | 00000090 r long_options
|
---|
| 28 | 00000092 t print_named_ascii
|
---|
| 29 | 000000bf t print_ascii
|
---|
| 30 | 00000168 t write_block
|
---|
| 31 | 00000366 t decode_format_string
|
---|
| 32 | 00000a71 T od_main
|
---|
| 33 |
|
---|
| 34 | Tested for compat with coreutils 6.3
|
---|
| 35 | using this script. Minor differences fixed.
|
---|
| 36 |
|
---|
| 37 | #!/bin/sh
|
---|
| 38 | echo STD
|
---|
| 39 | time /path/to/coreutils/od \
|
---|
| 40 | ...params... \
|
---|
| 41 | >std
|
---|
| 42 | echo Exit code $?
|
---|
| 43 | echo BBOX
|
---|
| 44 | time ./busybox od \
|
---|
| 45 | ...params... \
|
---|
| 46 | >bbox
|
---|
| 47 | echo Exit code $?
|
---|
| 48 | diff -u -a std bbox >bbox.diff || { echo Different!; sleep 1; }
|
---|
| 49 |
|
---|
| 50 | */
|
---|
| 51 |
|
---|
| 52 | #include "libbb.h"
|
---|
| 53 |
|
---|
| 54 | #define assert(a) ((void)0)
|
---|
| 55 |
|
---|
| 56 | /* Check for 0x7f is a coreutils 6.3 addition */
|
---|
| 57 | #define ISPRINT(c) (((c)>=' ') && (c) != 0x7f)
|
---|
| 58 |
|
---|
| 59 | typedef long double longdouble_t;
|
---|
| 60 | typedef unsigned long long ulonglong_t;
|
---|
| 61 | typedef long long llong;
|
---|
| 62 |
|
---|
| 63 | #if ENABLE_LFS
|
---|
| 64 | # define xstrtooff_sfx xstrtoull_sfx
|
---|
| 65 | #else
|
---|
| 66 | # define xstrtooff_sfx xstrtoul_sfx
|
---|
| 67 | #endif
|
---|
| 68 |
|
---|
| 69 | /* The default number of input bytes per output line. */
|
---|
| 70 | #define DEFAULT_BYTES_PER_BLOCK 16
|
---|
| 71 |
|
---|
| 72 | /* The number of decimal digits of precision in a float. */
|
---|
| 73 | #ifndef FLT_DIG
|
---|
| 74 | # define FLT_DIG 7
|
---|
| 75 | #endif
|
---|
| 76 |
|
---|
| 77 | /* The number of decimal digits of precision in a double. */
|
---|
| 78 | #ifndef DBL_DIG
|
---|
| 79 | # define DBL_DIG 15
|
---|
| 80 | #endif
|
---|
| 81 |
|
---|
| 82 | /* The number of decimal digits of precision in a long double. */
|
---|
| 83 | #ifndef LDBL_DIG
|
---|
| 84 | # define LDBL_DIG DBL_DIG
|
---|
| 85 | #endif
|
---|
| 86 |
|
---|
| 87 | enum size_spec {
|
---|
| 88 | NO_SIZE,
|
---|
| 89 | CHAR,
|
---|
| 90 | SHORT,
|
---|
| 91 | INT,
|
---|
| 92 | LONG,
|
---|
| 93 | LONG_LONG,
|
---|
| 94 | FLOAT_SINGLE,
|
---|
| 95 | FLOAT_DOUBLE,
|
---|
| 96 | FLOAT_LONG_DOUBLE,
|
---|
| 97 | N_SIZE_SPECS
|
---|
| 98 | };
|
---|
| 99 |
|
---|
| 100 | enum output_format {
|
---|
| 101 | SIGNED_DECIMAL,
|
---|
| 102 | UNSIGNED_DECIMAL,
|
---|
| 103 | OCTAL,
|
---|
| 104 | HEXADECIMAL,
|
---|
| 105 | FLOATING_POINT,
|
---|
| 106 | NAMED_CHARACTER,
|
---|
| 107 | CHARACTER
|
---|
| 108 | };
|
---|
| 109 |
|
---|
| 110 | /* Each output format specification (from '-t spec' or from
|
---|
| 111 | old-style options) is represented by one of these structures. */
|
---|
| 112 | struct tspec {
|
---|
| 113 | enum output_format fmt;
|
---|
| 114 | enum size_spec size;
|
---|
| 115 | void (*print_function) (size_t, const char *, const char *);
|
---|
| 116 | char *fmt_string;
|
---|
| 117 | int hexl_mode_trailer;
|
---|
| 118 | int field_width;
|
---|
| 119 | };
|
---|
| 120 |
|
---|
| 121 | /* Convert the number of 8-bit bytes of a binary representation to
|
---|
| 122 | the number of characters (digits + sign if the type is signed)
|
---|
| 123 | required to represent the same quantity in the specified base/type.
|
---|
| 124 | For example, a 32-bit (4-byte) quantity may require a field width
|
---|
| 125 | as wide as the following for these types:
|
---|
| 126 | 11 unsigned octal
|
---|
| 127 | 11 signed decimal
|
---|
| 128 | 10 unsigned decimal
|
---|
| 129 | 8 unsigned hexadecimal */
|
---|
| 130 |
|
---|
| 131 | static const uint8_t bytes_to_oct_digits[] ALIGN1 =
|
---|
| 132 | {0, 3, 6, 8, 11, 14, 16, 19, 22, 25, 27, 30, 32, 35, 38, 41, 43};
|
---|
| 133 |
|
---|
| 134 | static const uint8_t bytes_to_signed_dec_digits[] ALIGN1 =
|
---|
| 135 | {1, 4, 6, 8, 11, 13, 16, 18, 20, 23, 25, 28, 30, 33, 35, 37, 40};
|
---|
| 136 |
|
---|
| 137 | static const uint8_t bytes_to_unsigned_dec_digits[] ALIGN1 =
|
---|
| 138 | {0, 3, 5, 8, 10, 13, 15, 17, 20, 22, 25, 27, 29, 32, 34, 37, 39};
|
---|
| 139 |
|
---|
| 140 | static const uint8_t bytes_to_hex_digits[] ALIGN1 =
|
---|
| 141 | {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32};
|
---|
| 142 |
|
---|
| 143 | /* Convert enum size_spec to the size of the named type. */
|
---|
| 144 | static const signed char width_bytes[] ALIGN1 = {
|
---|
| 145 | -1,
|
---|
| 146 | sizeof(char),
|
---|
| 147 | sizeof(short),
|
---|
| 148 | sizeof(int),
|
---|
| 149 | sizeof(long),
|
---|
| 150 | sizeof(ulonglong_t),
|
---|
| 151 | sizeof(float),
|
---|
| 152 | sizeof(double),
|
---|
| 153 | sizeof(longdouble_t)
|
---|
| 154 | };
|
---|
| 155 | /* Ensure that for each member of 'enum size_spec' there is an
|
---|
| 156 | initializer in the width_bytes array. */
|
---|
| 157 | struct ERR_width_bytes_has_bad_size {
|
---|
| 158 | char ERR_width_bytes_has_bad_size[ARRAY_SIZE(width_bytes) == N_SIZE_SPECS ? 1 : -1];
|
---|
| 159 | };
|
---|
| 160 |
|
---|
| 161 | static smallint flag_dump_strings;
|
---|
| 162 | /* Non-zero if an old-style 'pseudo-address' was specified. */
|
---|
| 163 | static smallint flag_pseudo_start;
|
---|
| 164 | static smallint limit_bytes_to_format;
|
---|
| 165 | /* When zero and two or more consecutive blocks are equal, format
|
---|
| 166 | only the first block and output an asterisk alone on the following
|
---|
| 167 | line to indicate that identical blocks have been elided. */
|
---|
| 168 | static smallint verbose;
|
---|
| 169 | static smallint ioerror;
|
---|
| 170 |
|
---|
| 171 | static size_t string_min;
|
---|
| 172 |
|
---|
| 173 | /* An array of specs describing how to format each input block. */
|
---|
| 174 | static size_t n_specs;
|
---|
| 175 | static struct tspec *spec;
|
---|
| 176 |
|
---|
| 177 | /* Function that accepts an address and an optional following char,
|
---|
| 178 | and prints the address and char to stdout. */
|
---|
| 179 | static void (*format_address)(off_t, char);
|
---|
| 180 | /* The difference between the old-style pseudo starting address and
|
---|
| 181 | the number of bytes to skip. */
|
---|
| 182 | static off_t pseudo_offset;
|
---|
| 183 | /* When zero, MAX_BYTES_TO_FORMAT and END_OFFSET are ignored, and all
|
---|
| 184 | input is formatted. */
|
---|
| 185 |
|
---|
| 186 | /* The number of input bytes formatted per output line. It must be
|
---|
| 187 | a multiple of the least common multiple of the sizes associated with
|
---|
| 188 | the specified output types. It should be as large as possible, but
|
---|
| 189 | no larger than 16 -- unless specified with the -w option. */
|
---|
| 190 | static unsigned bytes_per_block = 32; /* have to use unsigned, not size_t */
|
---|
| 191 |
|
---|
| 192 | /* A NULL-terminated list of the file-arguments from the command line. */
|
---|
| 193 | static const char *const *file_list;
|
---|
| 194 |
|
---|
| 195 | /* The input stream associated with the current file. */
|
---|
| 196 | static FILE *in_stream;
|
---|
| 197 |
|
---|
| 198 | #define MAX_INTEGRAL_TYPE_SIZE sizeof(ulonglong_t)
|
---|
| 199 | static const unsigned char integral_type_size[MAX_INTEGRAL_TYPE_SIZE + 1] ALIGN1 = {
|
---|
| 200 | [sizeof(char)] = CHAR,
|
---|
| 201 | #if USHRT_MAX != UCHAR_MAX
|
---|
| 202 | [sizeof(short)] = SHORT,
|
---|
| 203 | #endif
|
---|
| 204 | #if UINT_MAX != USHRT_MAX
|
---|
| 205 | [sizeof(int)] = INT,
|
---|
| 206 | #endif
|
---|
| 207 | #if ULONG_MAX != UINT_MAX
|
---|
| 208 | [sizeof(long)] = LONG,
|
---|
| 209 | #endif
|
---|
| 210 | #if ULLONG_MAX != ULONG_MAX
|
---|
| 211 | [sizeof(ulonglong_t)] = LONG_LONG,
|
---|
| 212 | #endif
|
---|
| 213 | };
|
---|
| 214 |
|
---|
| 215 | #define MAX_FP_TYPE_SIZE sizeof(longdouble_t)
|
---|
| 216 | static const unsigned char fp_type_size[MAX_FP_TYPE_SIZE + 1] ALIGN1 = {
|
---|
| 217 | /* gcc seems to allow repeated indexes. Last one stays */
|
---|
| 218 | [sizeof(longdouble_t)] = FLOAT_LONG_DOUBLE,
|
---|
| 219 | [sizeof(double)] = FLOAT_DOUBLE,
|
---|
| 220 | [sizeof(float)] = FLOAT_SINGLE
|
---|
| 221 | };
|
---|
| 222 |
|
---|
| 223 |
|
---|
| 224 | static unsigned
|
---|
| 225 | gcd(unsigned u, unsigned v)
|
---|
| 226 | {
|
---|
| 227 | unsigned t;
|
---|
| 228 | while (v != 0) {
|
---|
| 229 | t = u % v;
|
---|
| 230 | u = v;
|
---|
| 231 | v = t;
|
---|
| 232 | }
|
---|
| 233 | return u;
|
---|
| 234 | }
|
---|
| 235 |
|
---|
| 236 | /* Compute the least common multiple of U and V. */
|
---|
| 237 | static unsigned
|
---|
| 238 | lcm(unsigned u, unsigned v) {
|
---|
| 239 | unsigned t = gcd(u, v);
|
---|
| 240 | if (t == 0)
|
---|
| 241 | return 0;
|
---|
| 242 | return u * v / t;
|
---|
| 243 | }
|
---|
| 244 |
|
---|
| 245 | static void
|
---|
| 246 | print_s_char(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 247 | {
|
---|
| 248 | while (n_bytes--) {
|
---|
| 249 | int tmp = *(signed char *) block;
|
---|
| 250 | printf(fmt_string, tmp);
|
---|
| 251 | block += sizeof(unsigned char);
|
---|
| 252 | }
|
---|
| 253 | }
|
---|
| 254 |
|
---|
| 255 | static void
|
---|
| 256 | print_char(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 257 | {
|
---|
| 258 | while (n_bytes--) {
|
---|
| 259 | unsigned tmp = *(unsigned char *) block;
|
---|
| 260 | printf(fmt_string, tmp);
|
---|
| 261 | block += sizeof(unsigned char);
|
---|
| 262 | }
|
---|
| 263 | }
|
---|
| 264 |
|
---|
| 265 | static void
|
---|
| 266 | print_s_short(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 267 | {
|
---|
| 268 | n_bytes /= sizeof(signed short);
|
---|
| 269 | while (n_bytes--) {
|
---|
| 270 | int tmp = *(signed short *) block;
|
---|
| 271 | printf(fmt_string, tmp);
|
---|
| 272 | block += sizeof(unsigned short);
|
---|
| 273 | }
|
---|
| 274 | }
|
---|
| 275 |
|
---|
| 276 | static void
|
---|
| 277 | print_short(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 278 | {
|
---|
| 279 | n_bytes /= sizeof(unsigned short);
|
---|
| 280 | while (n_bytes--) {
|
---|
| 281 | unsigned tmp = *(unsigned short *) block;
|
---|
| 282 | printf(fmt_string, tmp);
|
---|
| 283 | block += sizeof(unsigned short);
|
---|
| 284 | }
|
---|
| 285 | }
|
---|
| 286 |
|
---|
| 287 | static void
|
---|
| 288 | print_int(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 289 | {
|
---|
| 290 | n_bytes /= sizeof(unsigned);
|
---|
| 291 | while (n_bytes--) {
|
---|
| 292 | unsigned tmp = *(unsigned *) block;
|
---|
| 293 | printf(fmt_string, tmp);
|
---|
| 294 | block += sizeof(unsigned);
|
---|
| 295 | }
|
---|
| 296 | }
|
---|
| 297 |
|
---|
| 298 | #if UINT_MAX == ULONG_MAX
|
---|
| 299 | # define print_long print_int
|
---|
| 300 | #else
|
---|
| 301 | static void
|
---|
| 302 | print_long(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 303 | {
|
---|
| 304 | n_bytes /= sizeof(unsigned long);
|
---|
| 305 | while (n_bytes--) {
|
---|
| 306 | unsigned long tmp = *(unsigned long *) block;
|
---|
| 307 | printf(fmt_string, tmp);
|
---|
| 308 | block += sizeof(unsigned long);
|
---|
| 309 | }
|
---|
| 310 | }
|
---|
| 311 | #endif
|
---|
| 312 |
|
---|
| 313 | #if ULONG_MAX == ULLONG_MAX
|
---|
| 314 | # define print_long_long print_long
|
---|
| 315 | #else
|
---|
| 316 | static void
|
---|
| 317 | print_long_long(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 318 | {
|
---|
| 319 | n_bytes /= sizeof(ulonglong_t);
|
---|
| 320 | while (n_bytes--) {
|
---|
| 321 | ulonglong_t tmp = *(ulonglong_t *) block;
|
---|
| 322 | printf(fmt_string, tmp);
|
---|
| 323 | block += sizeof(ulonglong_t);
|
---|
| 324 | }
|
---|
| 325 | }
|
---|
| 326 | #endif
|
---|
| 327 |
|
---|
| 328 | static void
|
---|
| 329 | print_float(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 330 | {
|
---|
| 331 | n_bytes /= sizeof(float);
|
---|
| 332 | while (n_bytes--) {
|
---|
| 333 | float tmp = *(float *) block;
|
---|
| 334 | printf(fmt_string, tmp);
|
---|
| 335 | block += sizeof(float);
|
---|
| 336 | }
|
---|
| 337 | }
|
---|
| 338 |
|
---|
| 339 | static void
|
---|
| 340 | print_double(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 341 | {
|
---|
| 342 | n_bytes /= sizeof(double);
|
---|
| 343 | while (n_bytes--) {
|
---|
| 344 | double tmp = *(double *) block;
|
---|
| 345 | printf(fmt_string, tmp);
|
---|
| 346 | block += sizeof(double);
|
---|
| 347 | }
|
---|
| 348 | }
|
---|
| 349 |
|
---|
| 350 | static void
|
---|
| 351 | print_long_double(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
| 352 | {
|
---|
| 353 | n_bytes /= sizeof(longdouble_t);
|
---|
| 354 | while (n_bytes--) {
|
---|
| 355 | longdouble_t tmp = *(longdouble_t *) block;
|
---|
| 356 | printf(fmt_string, tmp);
|
---|
| 357 | block += sizeof(longdouble_t);
|
---|
| 358 | }
|
---|
| 359 | }
|
---|
| 360 |
|
---|
| 361 | /* print_[named]_ascii are optimized for speed.
|
---|
| 362 | * Remember, someday you may want to pump gigabytes through this thing.
|
---|
| 363 | * Saving a dozen of .text bytes here is counter-productive */
|
---|
| 364 |
|
---|
| 365 | static void
|
---|
| 366 | print_named_ascii(size_t n_bytes, const char *block,
|
---|
| 367 | const char *unused_fmt_string UNUSED_PARAM)
|
---|
| 368 | {
|
---|
| 369 | /* Names for some non-printing characters. */
|
---|
| 370 | static const char charname[33][3] ALIGN1 = {
|
---|
| 371 | "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
|
---|
| 372 | " bs", " ht", " nl", " vt", " ff", " cr", " so", " si",
|
---|
| 373 | "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb",
|
---|
| 374 | "can", " em", "sub", "esc", " fs", " gs", " rs", " us",
|
---|
| 375 | " sp"
|
---|
| 376 | };
|
---|
| 377 | // buf[N] pos: 01234 56789
|
---|
| 378 | char buf[12] = " x\0 0xx\0";
|
---|
| 379 | // actually " x\0 xxx\0", but I want to share the string with below.
|
---|
| 380 | // [12] because we take three 32bit stack slots anyway, and
|
---|
| 381 | // gcc is too dumb to initialize with constant stores,
|
---|
| 382 | // it copies initializer from rodata. Oh well.
|
---|
| 383 |
|
---|
| 384 | while (n_bytes--) {
|
---|
| 385 | unsigned masked_c = *(unsigned char *) block++;
|
---|
| 386 |
|
---|
| 387 | masked_c &= 0x7f;
|
---|
| 388 | if (masked_c == 0x7f) {
|
---|
| 389 | fputs(" del", stdout);
|
---|
| 390 | continue;
|
---|
| 391 | }
|
---|
| 392 | if (masked_c > ' ') {
|
---|
| 393 | buf[3] = masked_c;
|
---|
| 394 | fputs(buf, stdout);
|
---|
| 395 | continue;
|
---|
| 396 | }
|
---|
| 397 | /* Why? Because printf(" %3.3s") is much slower... */
|
---|
| 398 | buf[6] = charname[masked_c][0];
|
---|
| 399 | buf[7] = charname[masked_c][1];
|
---|
| 400 | buf[8] = charname[masked_c][2];
|
---|
| 401 | fputs(buf+5, stdout);
|
---|
| 402 | }
|
---|
| 403 | }
|
---|
| 404 |
|
---|
| 405 | static void
|
---|
| 406 | print_ascii(size_t n_bytes, const char *block,
|
---|
| 407 | const char *unused_fmt_string UNUSED_PARAM)
|
---|
| 408 | {
|
---|
| 409 | // buf[N] pos: 01234 56789
|
---|
| 410 | char buf[12] = " x\0 0xx\0";
|
---|
| 411 |
|
---|
| 412 | while (n_bytes--) {
|
---|
| 413 | const char *s;
|
---|
| 414 | unsigned c = *(unsigned char *) block++;
|
---|
| 415 |
|
---|
| 416 | if (ISPRINT(c)) {
|
---|
| 417 | buf[3] = c;
|
---|
| 418 | fputs(buf, stdout);
|
---|
| 419 | continue;
|
---|
| 420 | }
|
---|
| 421 | switch (c) {
|
---|
| 422 | case '\0':
|
---|
| 423 | s = " \\0";
|
---|
| 424 | break;
|
---|
| 425 | case '\007':
|
---|
| 426 | s = " \\a";
|
---|
| 427 | break;
|
---|
| 428 | case '\b':
|
---|
| 429 | s = " \\b";
|
---|
| 430 | break;
|
---|
| 431 | case '\f':
|
---|
| 432 | s = " \\f";
|
---|
| 433 | break;
|
---|
| 434 | case '\n':
|
---|
| 435 | s = " \\n";
|
---|
| 436 | break;
|
---|
| 437 | case '\r':
|
---|
| 438 | s = " \\r";
|
---|
| 439 | break;
|
---|
| 440 | case '\t':
|
---|
| 441 | s = " \\t";
|
---|
| 442 | break;
|
---|
| 443 | case '\v':
|
---|
| 444 | s = " \\v";
|
---|
| 445 | break;
|
---|
| 446 | case '\x7f':
|
---|
| 447 | s = " 177";
|
---|
| 448 | break;
|
---|
| 449 | default: /* c is never larger than 040 */
|
---|
| 450 | buf[7] = (c >> 3) + '0';
|
---|
| 451 | buf[8] = (c & 7) + '0';
|
---|
| 452 | s = buf + 5;
|
---|
| 453 | }
|
---|
| 454 | fputs(s, stdout);
|
---|
| 455 | }
|
---|
| 456 | }
|
---|
| 457 |
|
---|
| 458 | /* Given a list of one or more input filenames FILE_LIST, set the global
|
---|
| 459 | file pointer IN_STREAM and the global string INPUT_FILENAME to the
|
---|
| 460 | first one that can be successfully opened. Modify FILE_LIST to
|
---|
| 461 | reference the next filename in the list. A file name of "-" is
|
---|
| 462 | interpreted as standard input. If any file open fails, give an error
|
---|
| 463 | message and return nonzero. */
|
---|
| 464 |
|
---|
| 465 | static void
|
---|
| 466 | open_next_file(void)
|
---|
| 467 | {
|
---|
| 468 | while (1) {
|
---|
| 469 | if (!*file_list)
|
---|
| 470 | return;
|
---|
| 471 | in_stream = fopen_or_warn_stdin(*file_list++);
|
---|
| 472 | if (in_stream) {
|
---|
| 473 | break;
|
---|
| 474 | }
|
---|
| 475 | ioerror = 1;
|
---|
| 476 | }
|
---|
| 477 |
|
---|
| 478 | if (limit_bytes_to_format && !flag_dump_strings)
|
---|
| 479 | setbuf(in_stream, NULL);
|
---|
| 480 | }
|
---|
| 481 |
|
---|
| 482 | /* Test whether there have been errors on in_stream, and close it if
|
---|
| 483 | it is not standard input. Return nonzero if there has been an error
|
---|
| 484 | on in_stream or stdout; return zero otherwise. This function will
|
---|
| 485 | report more than one error only if both a read and a write error
|
---|
| 486 | have occurred. IN_ERRNO, if nonzero, is the error number
|
---|
| 487 | corresponding to the most recent action for IN_STREAM. */
|
---|
| 488 |
|
---|
| 489 | static void
|
---|
| 490 | check_and_close(void)
|
---|
| 491 | {
|
---|
| 492 | if (in_stream) {
|
---|
| 493 | if (ferror(in_stream)) {
|
---|
| 494 | bb_error_msg("%s: read error", (in_stream == stdin)
|
---|
| 495 | ? bb_msg_standard_input
|
---|
| 496 | : file_list[-1]
|
---|
| 497 | );
|
---|
| 498 | ioerror = 1;
|
---|
| 499 | }
|
---|
| 500 | fclose_if_not_stdin(in_stream);
|
---|
| 501 | in_stream = NULL;
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 | if (ferror(stdout)) {
|
---|
| 505 | bb_error_msg(bb_msg_write_error);
|
---|
| 506 | ioerror = 1;
|
---|
| 507 | }
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | /* If S points to a single valid modern od format string, put
|
---|
| 511 | a description of that format in *TSPEC, return pointer to
|
---|
| 512 | character following the just-decoded format.
|
---|
| 513 | For example, if S were "d4afL", we will return a rtp to "afL"
|
---|
| 514 | and *TSPEC would be
|
---|
| 515 | {
|
---|
| 516 | fmt = SIGNED_DECIMAL;
|
---|
| 517 | size = INT or LONG; (whichever integral_type_size[4] resolves to)
|
---|
| 518 | print_function = print_int; (assuming size == INT)
|
---|
| 519 | fmt_string = "%011d%c";
|
---|
| 520 | }
|
---|
| 521 | S_ORIG is solely for reporting errors. It should be the full format
|
---|
| 522 | string argument. */
|
---|
| 523 |
|
---|
| 524 | static NOINLINE const char *
|
---|
| 525 | decode_one_format(const char *s_orig, const char *s, struct tspec *tspec)
|
---|
| 526 | {
|
---|
| 527 | enum size_spec size_spec;
|
---|
| 528 | unsigned size;
|
---|
| 529 | enum output_format fmt;
|
---|
| 530 | const char *p;
|
---|
| 531 | char *end;
|
---|
| 532 | char *fmt_string = NULL;
|
---|
| 533 | void (*print_function) (size_t, const char *, const char *);
|
---|
| 534 | unsigned c;
|
---|
| 535 | unsigned field_width = 0;
|
---|
| 536 | int pos;
|
---|
| 537 |
|
---|
| 538 |
|
---|
| 539 | switch (*s) {
|
---|
| 540 | case 'd':
|
---|
| 541 | case 'o':
|
---|
| 542 | case 'u':
|
---|
| 543 | case 'x': {
|
---|
| 544 | static const char CSIL[] ALIGN1 = "CSIL";
|
---|
| 545 |
|
---|
| 546 | c = *s++;
|
---|
| 547 | p = strchr(CSIL, *s);
|
---|
| 548 | /* if *s == NUL, p != NULL! Testcase: "od -tx" */
|
---|
| 549 | if (!p || *p == '\0') {
|
---|
| 550 | size = sizeof(int);
|
---|
| 551 | if (isdigit(s[0])) {
|
---|
| 552 | size = bb_strtou(s, &end, 0);
|
---|
| 553 | if (errno == ERANGE
|
---|
| 554 | || MAX_INTEGRAL_TYPE_SIZE < size
|
---|
| 555 | || integral_type_size[size] == NO_SIZE
|
---|
| 556 | ) {
|
---|
| 557 | bb_error_msg_and_die("invalid type string '%s'; "
|
---|
| 558 | "%u-byte %s type is not supported",
|
---|
| 559 | s_orig, size, "integral");
|
---|
| 560 | }
|
---|
| 561 | s = end;
|
---|
| 562 | }
|
---|
| 563 | } else {
|
---|
| 564 | static const uint8_t CSIL_sizeof[4] = {
|
---|
| 565 | sizeof(char),
|
---|
| 566 | sizeof(short),
|
---|
| 567 | sizeof(int),
|
---|
| 568 | sizeof(long),
|
---|
| 569 | };
|
---|
| 570 | size = CSIL_sizeof[p - CSIL];
|
---|
| 571 | s++; /* skip C/S/I/L */
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | #define ISPEC_TO_FORMAT(Spec, Min_format, Long_format, Max_format) \
|
---|
| 575 | ((Spec) == LONG_LONG ? (Max_format) \
|
---|
| 576 | : ((Spec) == LONG ? (Long_format) : (Min_format)))
|
---|
| 577 |
|
---|
| 578 | #define FMT_BYTES_ALLOCATED 9
|
---|
| 579 | size_spec = integral_type_size[size];
|
---|
| 580 |
|
---|
| 581 | {
|
---|
| 582 | static const char doux[] ALIGN1 = "doux";
|
---|
| 583 | static const char doux_fmt_letter[][4] = {
|
---|
| 584 | "lld", "llo", "llu", "llx"
|
---|
| 585 | };
|
---|
| 586 | static const enum output_format doux_fmt[] = {
|
---|
| 587 | SIGNED_DECIMAL,
|
---|
| 588 | OCTAL,
|
---|
| 589 | UNSIGNED_DECIMAL,
|
---|
| 590 | HEXADECIMAL,
|
---|
| 591 | };
|
---|
| 592 | static const uint8_t *const doux_bytes_to_XXX[] = {
|
---|
| 593 | bytes_to_signed_dec_digits,
|
---|
| 594 | bytes_to_oct_digits,
|
---|
| 595 | bytes_to_unsigned_dec_digits,
|
---|
| 596 | bytes_to_hex_digits,
|
---|
| 597 | };
|
---|
| 598 | static const char doux_fmtstring[][sizeof(" %%0%u%s")] = {
|
---|
| 599 | " %%%u%s",
|
---|
| 600 | " %%0%u%s",
|
---|
| 601 | " %%%u%s",
|
---|
| 602 | " %%0%u%s",
|
---|
| 603 | };
|
---|
| 604 |
|
---|
| 605 | pos = strchr(doux, c) - doux;
|
---|
| 606 | fmt = doux_fmt[pos];
|
---|
| 607 | field_width = doux_bytes_to_XXX[pos][size];
|
---|
| 608 | p = doux_fmt_letter[pos] + 2;
|
---|
| 609 | if (size_spec == LONG) p--;
|
---|
| 610 | if (size_spec == LONG_LONG) p -= 2;
|
---|
| 611 | fmt_string = xasprintf(doux_fmtstring[pos], field_width, p);
|
---|
| 612 | }
|
---|
| 613 |
|
---|
| 614 | switch (size_spec) {
|
---|
| 615 | case CHAR:
|
---|
| 616 | print_function = (fmt == SIGNED_DECIMAL
|
---|
| 617 | ? print_s_char
|
---|
| 618 | : print_char);
|
---|
| 619 | break;
|
---|
| 620 | case SHORT:
|
---|
| 621 | print_function = (fmt == SIGNED_DECIMAL
|
---|
| 622 | ? print_s_short
|
---|
| 623 | : print_short);
|
---|
| 624 | break;
|
---|
| 625 | case INT:
|
---|
| 626 | print_function = print_int;
|
---|
| 627 | break;
|
---|
| 628 | case LONG:
|
---|
| 629 | print_function = print_long;
|
---|
| 630 | break;
|
---|
| 631 | default: /* case LONG_LONG: */
|
---|
| 632 | print_function = print_long_long;
|
---|
| 633 | break;
|
---|
| 634 | }
|
---|
| 635 | break;
|
---|
| 636 | }
|
---|
| 637 |
|
---|
| 638 | case 'f': {
|
---|
| 639 | static const char FDL[] ALIGN1 = "FDL";
|
---|
| 640 |
|
---|
| 641 | fmt = FLOATING_POINT;
|
---|
| 642 | ++s;
|
---|
| 643 | p = strchr(FDL, *s);
|
---|
| 644 | if (!p) {
|
---|
| 645 | size = sizeof(double);
|
---|
| 646 | if (isdigit(s[0])) {
|
---|
| 647 | size = bb_strtou(s, &end, 0);
|
---|
| 648 | if (errno == ERANGE || size > MAX_FP_TYPE_SIZE
|
---|
| 649 | || fp_type_size[size] == NO_SIZE
|
---|
| 650 | ) {
|
---|
| 651 | bb_error_msg_and_die("invalid type string '%s'; "
|
---|
| 652 | "%u-byte %s type is not supported",
|
---|
| 653 | s_orig, size, "floating point");
|
---|
| 654 | }
|
---|
| 655 | s = end;
|
---|
| 656 | }
|
---|
| 657 | } else {
|
---|
| 658 | static const uint8_t FDL_sizeof[] = {
|
---|
| 659 | sizeof(float),
|
---|
| 660 | sizeof(double),
|
---|
| 661 | sizeof(longdouble_t),
|
---|
| 662 | };
|
---|
| 663 |
|
---|
| 664 | size = FDL_sizeof[p - FDL];
|
---|
| 665 | }
|
---|
| 666 |
|
---|
| 667 | size_spec = fp_type_size[size];
|
---|
| 668 |
|
---|
| 669 | switch (size_spec) {
|
---|
| 670 | case FLOAT_SINGLE:
|
---|
| 671 | print_function = print_float;
|
---|
| 672 | field_width = FLT_DIG + 8;
|
---|
| 673 | /* Don't use %#e; not all systems support it. */
|
---|
| 674 | fmt_string = xasprintf(" %%%d.%de", field_width, FLT_DIG);
|
---|
| 675 | break;
|
---|
| 676 | case FLOAT_DOUBLE:
|
---|
| 677 | print_function = print_double;
|
---|
| 678 | field_width = DBL_DIG + 8;
|
---|
| 679 | fmt_string = xasprintf(" %%%d.%de", field_width, DBL_DIG);
|
---|
| 680 | break;
|
---|
| 681 | default: /* case FLOAT_LONG_DOUBLE: */
|
---|
| 682 | print_function = print_long_double;
|
---|
| 683 | field_width = LDBL_DIG + 8;
|
---|
| 684 | fmt_string = xasprintf(" %%%d.%dLe", field_width, LDBL_DIG);
|
---|
| 685 | break;
|
---|
| 686 | }
|
---|
| 687 | break;
|
---|
| 688 | }
|
---|
| 689 |
|
---|
| 690 | case 'a':
|
---|
| 691 | ++s;
|
---|
| 692 | fmt = NAMED_CHARACTER;
|
---|
| 693 | size_spec = CHAR;
|
---|
| 694 | print_function = print_named_ascii;
|
---|
| 695 | field_width = 3;
|
---|
| 696 | break;
|
---|
| 697 | case 'c':
|
---|
| 698 | ++s;
|
---|
| 699 | fmt = CHARACTER;
|
---|
| 700 | size_spec = CHAR;
|
---|
| 701 | print_function = print_ascii;
|
---|
| 702 | field_width = 3;
|
---|
| 703 | break;
|
---|
| 704 | default:
|
---|
| 705 | bb_error_msg_and_die("invalid character '%c' "
|
---|
| 706 | "in type string '%s'", *s, s_orig);
|
---|
| 707 | }
|
---|
| 708 |
|
---|
| 709 | tspec->size = size_spec;
|
---|
| 710 | tspec->fmt = fmt;
|
---|
| 711 | tspec->print_function = print_function;
|
---|
| 712 | tspec->fmt_string = fmt_string;
|
---|
| 713 |
|
---|
| 714 | tspec->field_width = field_width;
|
---|
| 715 | tspec->hexl_mode_trailer = (*s == 'z');
|
---|
| 716 | if (tspec->hexl_mode_trailer)
|
---|
| 717 | s++;
|
---|
| 718 |
|
---|
| 719 | return s;
|
---|
| 720 | }
|
---|
| 721 |
|
---|
| 722 | /* Decode the modern od format string S. Append the decoded
|
---|
| 723 | representation to the global array SPEC, reallocating SPEC if
|
---|
| 724 | necessary. */
|
---|
| 725 |
|
---|
| 726 | static void
|
---|
| 727 | decode_format_string(const char *s)
|
---|
| 728 | {
|
---|
| 729 | const char *s_orig = s;
|
---|
| 730 |
|
---|
| 731 | while (*s != '\0') {
|
---|
| 732 | struct tspec tspec;
|
---|
| 733 | const char *next;
|
---|
| 734 |
|
---|
| 735 | next = decode_one_format(s_orig, s, &tspec);
|
---|
| 736 |
|
---|
| 737 | assert(s != next);
|
---|
| 738 | s = next;
|
---|
| 739 | spec = xrealloc_vector(spec, 4, n_specs);
|
---|
| 740 | memcpy(&spec[n_specs], &tspec, sizeof(spec[0]));
|
---|
| 741 | n_specs++;
|
---|
| 742 | }
|
---|
| 743 | }
|
---|
| 744 |
|
---|
| 745 | /* Given a list of one or more input filenames FILE_LIST, set the global
|
---|
| 746 | file pointer IN_STREAM to position N_SKIP in the concatenation of
|
---|
| 747 | those files. If any file operation fails or if there are fewer than
|
---|
| 748 | N_SKIP bytes in the combined input, give an error message and return
|
---|
| 749 | nonzero. When possible, use seek rather than read operations to
|
---|
| 750 | advance IN_STREAM. */
|
---|
| 751 |
|
---|
| 752 | static void
|
---|
| 753 | skip(off_t n_skip)
|
---|
| 754 | {
|
---|
| 755 | if (n_skip == 0)
|
---|
| 756 | return;
|
---|
| 757 |
|
---|
| 758 | while (in_stream) { /* !EOF */
|
---|
| 759 | struct stat file_stats;
|
---|
| 760 |
|
---|
| 761 | /* First try seeking. For large offsets, this extra work is
|
---|
| 762 | worthwhile. If the offset is below some threshold it may be
|
---|
| 763 | more efficient to move the pointer by reading. There are two
|
---|
| 764 | issues when trying to seek:
|
---|
| 765 | - the file must be seekable.
|
---|
| 766 | - before seeking to the specified position, make sure
|
---|
| 767 | that the new position is in the current file.
|
---|
| 768 | Try to do that by getting file's size using fstat.
|
---|
| 769 | But that will work only for regular files. */
|
---|
| 770 |
|
---|
| 771 | /* The st_size field is valid only for regular files
|
---|
| 772 | (and for symbolic links, which cannot occur here).
|
---|
| 773 | If the number of bytes left to skip is at least
|
---|
| 774 | as large as the size of the current file, we can
|
---|
| 775 | decrement n_skip and go on to the next file. */
|
---|
| 776 | if (fstat(fileno(in_stream), &file_stats) == 0
|
---|
| 777 | && S_ISREG(file_stats.st_mode) && file_stats.st_size > 0
|
---|
| 778 | ) {
|
---|
| 779 | if (file_stats.st_size < n_skip) {
|
---|
| 780 | n_skip -= file_stats.st_size;
|
---|
| 781 | /* take "check & close / open_next" route */
|
---|
| 782 | } else {
|
---|
| 783 | if (fseeko(in_stream, n_skip, SEEK_CUR) != 0)
|
---|
| 784 | ioerror = 1;
|
---|
| 785 | return;
|
---|
| 786 | }
|
---|
| 787 | } else {
|
---|
| 788 | /* If it's not a regular file with positive size,
|
---|
| 789 | position the file pointer by reading. */
|
---|
| 790 | char buf[1024];
|
---|
| 791 | size_t n_bytes_to_read = 1024;
|
---|
| 792 | size_t n_bytes_read;
|
---|
| 793 |
|
---|
| 794 | while (n_skip > 0) {
|
---|
| 795 | if (n_skip < n_bytes_to_read)
|
---|
| 796 | n_bytes_to_read = n_skip;
|
---|
| 797 | n_bytes_read = fread(buf, 1, n_bytes_to_read, in_stream);
|
---|
| 798 | n_skip -= n_bytes_read;
|
---|
| 799 | if (n_bytes_read != n_bytes_to_read)
|
---|
| 800 | break; /* EOF on this file or error */
|
---|
| 801 | }
|
---|
| 802 | }
|
---|
| 803 | if (n_skip == 0)
|
---|
| 804 | return;
|
---|
| 805 |
|
---|
| 806 | check_and_close();
|
---|
| 807 | open_next_file();
|
---|
| 808 | }
|
---|
| 809 |
|
---|
| 810 | if (n_skip)
|
---|
| 811 | bb_error_msg_and_die("can't skip past end of combined input");
|
---|
| 812 | }
|
---|
| 813 |
|
---|
| 814 |
|
---|
| 815 | typedef void FN_format_address(off_t address, char c);
|
---|
| 816 |
|
---|
| 817 | static void
|
---|
| 818 | format_address_none(off_t address UNUSED_PARAM, char c UNUSED_PARAM)
|
---|
| 819 | {
|
---|
| 820 | }
|
---|
| 821 |
|
---|
| 822 | static char address_fmt[] ALIGN1 = "%0n"OFF_FMT"xc";
|
---|
| 823 | /* Corresponds to 'x' above */
|
---|
| 824 | #define address_base_char address_fmt[sizeof(address_fmt)-3]
|
---|
| 825 | /* Corresponds to 'n' above */
|
---|
| 826 | #define address_pad_len_char address_fmt[2]
|
---|
| 827 |
|
---|
| 828 | static void
|
---|
| 829 | format_address_std(off_t address, char c)
|
---|
| 830 | {
|
---|
| 831 | /* Corresponds to 'c' */
|
---|
| 832 | address_fmt[sizeof(address_fmt)-2] = c;
|
---|
| 833 | printf(address_fmt, address);
|
---|
| 834 | }
|
---|
| 835 |
|
---|
| 836 | #if ENABLE_LONG_OPTS
|
---|
| 837 | /* only used with --traditional */
|
---|
| 838 | static void
|
---|
| 839 | format_address_paren(off_t address, char c)
|
---|
| 840 | {
|
---|
| 841 | putchar('(');
|
---|
| 842 | format_address_std(address, ')');
|
---|
| 843 | if (c) putchar(c);
|
---|
| 844 | }
|
---|
| 845 |
|
---|
| 846 | static void
|
---|
| 847 | format_address_label(off_t address, char c)
|
---|
| 848 | {
|
---|
| 849 | format_address_std(address, ' ');
|
---|
| 850 | format_address_paren(address + pseudo_offset, c);
|
---|
| 851 | }
|
---|
| 852 | #endif
|
---|
| 853 |
|
---|
| 854 | static void
|
---|
| 855 | dump_hexl_mode_trailer(size_t n_bytes, const char *block)
|
---|
| 856 | {
|
---|
| 857 | fputs(" >", stdout);
|
---|
| 858 | while (n_bytes--) {
|
---|
| 859 | unsigned c = *(unsigned char *) block++;
|
---|
| 860 | c = (ISPRINT(c) ? c : '.');
|
---|
| 861 | putchar(c);
|
---|
| 862 | }
|
---|
| 863 | putchar('<');
|
---|
| 864 | }
|
---|
| 865 |
|
---|
| 866 | /* Write N_BYTES bytes from CURR_BLOCK to standard output once for each
|
---|
| 867 | of the N_SPEC format specs. CURRENT_OFFSET is the byte address of
|
---|
| 868 | CURR_BLOCK in the concatenation of input files, and it is printed
|
---|
| 869 | (optionally) only before the output line associated with the first
|
---|
| 870 | format spec. When duplicate blocks are being abbreviated, the output
|
---|
| 871 | for a sequence of identical input blocks is the output for the first
|
---|
| 872 | block followed by an asterisk alone on a line. It is valid to compare
|
---|
| 873 | the blocks PREV_BLOCK and CURR_BLOCK only when N_BYTES == BYTES_PER_BLOCK.
|
---|
| 874 | That condition may be false only for the last input block -- and then
|
---|
| 875 | only when it has not been padded to length BYTES_PER_BLOCK. */
|
---|
| 876 |
|
---|
| 877 | static void
|
---|
| 878 | write_block(off_t current_offset, size_t n_bytes,
|
---|
| 879 | const char *prev_block, const char *curr_block)
|
---|
| 880 | {
|
---|
| 881 | static char first = 1;
|
---|
| 882 | static char prev_pair_equal = 0;
|
---|
| 883 | size_t i;
|
---|
| 884 |
|
---|
| 885 | if (!verbose && !first
|
---|
| 886 | && n_bytes == bytes_per_block
|
---|
| 887 | && memcmp(prev_block, curr_block, bytes_per_block) == 0
|
---|
| 888 | ) {
|
---|
| 889 | if (prev_pair_equal) {
|
---|
| 890 | /* The two preceding blocks were equal, and the current
|
---|
| 891 | block is the same as the last one, so print nothing. */
|
---|
| 892 | } else {
|
---|
| 893 | puts("*");
|
---|
| 894 | prev_pair_equal = 1;
|
---|
| 895 | }
|
---|
| 896 | } else {
|
---|
| 897 | first = 0;
|
---|
| 898 | prev_pair_equal = 0;
|
---|
| 899 | for (i = 0; i < n_specs; i++) {
|
---|
| 900 | if (i == 0)
|
---|
| 901 | format_address(current_offset, '\0');
|
---|
| 902 | else
|
---|
| 903 | printf("%*s", address_pad_len_char - '0', "");
|
---|
| 904 | (*spec[i].print_function) (n_bytes, curr_block, spec[i].fmt_string);
|
---|
| 905 | if (spec[i].hexl_mode_trailer) {
|
---|
| 906 | /* space-pad out to full line width, then dump the trailer */
|
---|
| 907 | int datum_width = width_bytes[spec[i].size];
|
---|
| 908 | int blank_fields = (bytes_per_block - n_bytes) / datum_width;
|
---|
| 909 | int field_width = spec[i].field_width + 1;
|
---|
| 910 | printf("%*s", blank_fields * field_width, "");
|
---|
| 911 | dump_hexl_mode_trailer(n_bytes, curr_block);
|
---|
| 912 | }
|
---|
| 913 | putchar('\n');
|
---|
| 914 | }
|
---|
| 915 | }
|
---|
| 916 | }
|
---|
| 917 |
|
---|
| 918 | static void
|
---|
| 919 | read_block(size_t n, char *block, size_t *n_bytes_in_buffer)
|
---|
| 920 | {
|
---|
| 921 | assert(0 < n && n <= bytes_per_block);
|
---|
| 922 |
|
---|
| 923 | *n_bytes_in_buffer = 0;
|
---|
| 924 |
|
---|
| 925 | if (n == 0)
|
---|
| 926 | return;
|
---|
| 927 |
|
---|
| 928 | while (in_stream != NULL) { /* EOF. */
|
---|
| 929 | size_t n_needed;
|
---|
| 930 | size_t n_read;
|
---|
| 931 |
|
---|
| 932 | n_needed = n - *n_bytes_in_buffer;
|
---|
| 933 | n_read = fread(block + *n_bytes_in_buffer, 1, n_needed, in_stream);
|
---|
| 934 | *n_bytes_in_buffer += n_read;
|
---|
| 935 | if (n_read == n_needed)
|
---|
| 936 | break;
|
---|
| 937 | /* error check is done in check_and_close */
|
---|
| 938 | check_and_close();
|
---|
| 939 | open_next_file();
|
---|
| 940 | }
|
---|
| 941 | }
|
---|
| 942 |
|
---|
| 943 | /* Return the least common multiple of the sizes associated
|
---|
| 944 | with the format specs. */
|
---|
| 945 |
|
---|
| 946 | static int
|
---|
| 947 | get_lcm(void)
|
---|
| 948 | {
|
---|
| 949 | size_t i;
|
---|
| 950 | int l_c_m = 1;
|
---|
| 951 |
|
---|
| 952 | for (i = 0; i < n_specs; i++)
|
---|
| 953 | l_c_m = lcm(l_c_m, width_bytes[(int) spec[i].size]);
|
---|
| 954 | return l_c_m;
|
---|
| 955 | }
|
---|
| 956 |
|
---|
| 957 | #if ENABLE_LONG_OPTS
|
---|
| 958 | /* If S is a valid traditional offset specification with an optional
|
---|
| 959 | leading '+' return nonzero and set *OFFSET to the offset it denotes. */
|
---|
| 960 |
|
---|
| 961 | static int
|
---|
| 962 | parse_old_offset(const char *s, off_t *offset)
|
---|
| 963 | {
|
---|
| 964 | static const struct suffix_mult Bb[] = {
|
---|
| 965 | { "B", 1024 },
|
---|
| 966 | { "b", 512 },
|
---|
| 967 | { "", 0 }
|
---|
| 968 | };
|
---|
| 969 | char *p;
|
---|
| 970 | int radix;
|
---|
| 971 |
|
---|
| 972 | /* Skip over any leading '+'. */
|
---|
| 973 | if (s[0] == '+') ++s;
|
---|
| 974 |
|
---|
| 975 | /* Determine the radix we'll use to interpret S. If there is a '.',
|
---|
| 976 | * it's decimal, otherwise, if the string begins with '0X'or '0x',
|
---|
| 977 | * it's hexadecimal, else octal. */
|
---|
| 978 | p = strchr(s, '.');
|
---|
| 979 | radix = 8;
|
---|
| 980 | if (p) {
|
---|
| 981 | p[0] = '\0'; /* cheating */
|
---|
| 982 | radix = 10;
|
---|
| 983 | } else if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'))
|
---|
| 984 | radix = 16;
|
---|
| 985 |
|
---|
| 986 | *offset = xstrtooff_sfx(s, radix, Bb);
|
---|
| 987 | if (p) p[0] = '.';
|
---|
| 988 |
|
---|
| 989 | return (*offset >= 0);
|
---|
| 990 | }
|
---|
| 991 | #endif
|
---|
| 992 |
|
---|
| 993 | /* Read a chunk of size BYTES_PER_BLOCK from the input files, write the
|
---|
| 994 | formatted block to standard output, and repeat until the specified
|
---|
| 995 | maximum number of bytes has been read or until all input has been
|
---|
| 996 | processed. If the last block read is smaller than BYTES_PER_BLOCK
|
---|
| 997 | and its size is not a multiple of the size associated with a format
|
---|
| 998 | spec, extend the input block with zero bytes until its length is a
|
---|
| 999 | multiple of all format spec sizes. Write the final block. Finally,
|
---|
| 1000 | write on a line by itself the offset of the byte after the last byte
|
---|
| 1001 | read. */
|
---|
| 1002 |
|
---|
| 1003 | static void
|
---|
| 1004 | dump(off_t current_offset, off_t end_offset)
|
---|
| 1005 | {
|
---|
| 1006 | char *block[2];
|
---|
| 1007 | int idx;
|
---|
| 1008 | size_t n_bytes_read;
|
---|
| 1009 |
|
---|
| 1010 | block[0] = xmalloc(2*bytes_per_block);
|
---|
| 1011 | block[1] = block[0] + bytes_per_block;
|
---|
| 1012 |
|
---|
| 1013 | idx = 0;
|
---|
| 1014 | if (limit_bytes_to_format) {
|
---|
| 1015 | while (1) {
|
---|
| 1016 | size_t n_needed;
|
---|
| 1017 | if (current_offset >= end_offset) {
|
---|
| 1018 | n_bytes_read = 0;
|
---|
| 1019 | break;
|
---|
| 1020 | }
|
---|
| 1021 | n_needed = MIN(end_offset - current_offset,
|
---|
| 1022 | (off_t) bytes_per_block);
|
---|
| 1023 | read_block(n_needed, block[idx], &n_bytes_read);
|
---|
| 1024 | if (n_bytes_read < bytes_per_block)
|
---|
| 1025 | break;
|
---|
| 1026 | assert(n_bytes_read == bytes_per_block);
|
---|
| 1027 | write_block(current_offset, n_bytes_read,
|
---|
| 1028 | block[!idx], block[idx]);
|
---|
| 1029 | current_offset += n_bytes_read;
|
---|
| 1030 | idx = !idx;
|
---|
| 1031 | }
|
---|
| 1032 | } else {
|
---|
| 1033 | while (1) {
|
---|
| 1034 | read_block(bytes_per_block, block[idx], &n_bytes_read);
|
---|
| 1035 | if (n_bytes_read < bytes_per_block)
|
---|
| 1036 | break;
|
---|
| 1037 | assert(n_bytes_read == bytes_per_block);
|
---|
| 1038 | write_block(current_offset, n_bytes_read,
|
---|
| 1039 | block[!idx], block[idx]);
|
---|
| 1040 | current_offset += n_bytes_read;
|
---|
| 1041 | idx = !idx;
|
---|
| 1042 | }
|
---|
| 1043 | }
|
---|
| 1044 |
|
---|
| 1045 | if (n_bytes_read > 0) {
|
---|
| 1046 | int l_c_m;
|
---|
| 1047 | size_t bytes_to_write;
|
---|
| 1048 |
|
---|
| 1049 | l_c_m = get_lcm();
|
---|
| 1050 |
|
---|
| 1051 | /* Make bytes_to_write the smallest multiple of l_c_m that
|
---|
| 1052 | is at least as large as n_bytes_read. */
|
---|
| 1053 | bytes_to_write = l_c_m * ((n_bytes_read + l_c_m - 1) / l_c_m);
|
---|
| 1054 |
|
---|
| 1055 | memset(block[idx] + n_bytes_read, 0, bytes_to_write - n_bytes_read);
|
---|
| 1056 | write_block(current_offset, bytes_to_write,
|
---|
| 1057 | block[!idx], block[idx]);
|
---|
| 1058 | current_offset += n_bytes_read;
|
---|
| 1059 | }
|
---|
| 1060 |
|
---|
| 1061 | format_address(current_offset, '\n');
|
---|
| 1062 |
|
---|
| 1063 | if (limit_bytes_to_format && current_offset >= end_offset)
|
---|
| 1064 | check_and_close();
|
---|
| 1065 |
|
---|
| 1066 | free(block[0]);
|
---|
| 1067 | }
|
---|
| 1068 |
|
---|
| 1069 | /* Read a single byte into *C from the concatenation of the input files
|
---|
| 1070 | named in the global array FILE_LIST. On the first call to this
|
---|
| 1071 | function, the global variable IN_STREAM is expected to be an open
|
---|
| 1072 | stream associated with the input file INPUT_FILENAME. If IN_STREAM
|
---|
| 1073 | is at end-of-file, close it and update the global variables IN_STREAM
|
---|
| 1074 | and INPUT_FILENAME so they correspond to the next file in the list.
|
---|
| 1075 | Then try to read a byte from the newly opened file. Repeat if
|
---|
| 1076 | necessary until EOF is reached for the last file in FILE_LIST, then
|
---|
| 1077 | set *C to EOF and return. Subsequent calls do likewise. */
|
---|
| 1078 |
|
---|
| 1079 | static void
|
---|
| 1080 | read_char(int *c)
|
---|
| 1081 | {
|
---|
| 1082 | while (in_stream) { /* !EOF */
|
---|
| 1083 | *c = fgetc(in_stream);
|
---|
| 1084 | if (*c != EOF)
|
---|
| 1085 | return;
|
---|
| 1086 | check_and_close();
|
---|
| 1087 | open_next_file();
|
---|
| 1088 | }
|
---|
| 1089 | *c = EOF;
|
---|
| 1090 | }
|
---|
| 1091 |
|
---|
| 1092 | /* Read N bytes into BLOCK from the concatenation of the input files
|
---|
| 1093 | named in the global array FILE_LIST. On the first call to this
|
---|
| 1094 | function, the global variable IN_STREAM is expected to be an open
|
---|
| 1095 | stream associated with the input file INPUT_FILENAME. If all N
|
---|
| 1096 | bytes cannot be read from IN_STREAM, close IN_STREAM and update
|
---|
| 1097 | the global variables IN_STREAM and INPUT_FILENAME. Then try to
|
---|
| 1098 | read the remaining bytes from the newly opened file. Repeat if
|
---|
| 1099 | necessary until EOF is reached for the last file in FILE_LIST.
|
---|
| 1100 | On subsequent calls, don't modify BLOCK and return zero. Set
|
---|
| 1101 | *N_BYTES_IN_BUFFER to the number of bytes read. If an error occurs,
|
---|
| 1102 | it will be detected through ferror when the stream is about to be
|
---|
| 1103 | closed. If there is an error, give a message but continue reading
|
---|
| 1104 | as usual and return nonzero. Otherwise return zero. */
|
---|
| 1105 |
|
---|
| 1106 | /* STRINGS mode. Find each "string constant" in the input.
|
---|
| 1107 | A string constant is a run of at least 'string_min' ASCII
|
---|
| 1108 | graphic (or formatting) characters terminated by a null.
|
---|
| 1109 | Based on a function written by Richard Stallman for a
|
---|
| 1110 | traditional version of od. */
|
---|
| 1111 |
|
---|
| 1112 | static void
|
---|
| 1113 | dump_strings(off_t address, off_t end_offset)
|
---|
| 1114 | {
|
---|
| 1115 | size_t bufsize = MAX(100, string_min);
|
---|
| 1116 | char *buf = xmalloc(bufsize);
|
---|
| 1117 |
|
---|
| 1118 | while (1) {
|
---|
| 1119 | size_t i;
|
---|
| 1120 | int c;
|
---|
| 1121 |
|
---|
| 1122 | /* See if the next 'string_min' chars are all printing chars. */
|
---|
| 1123 | tryline:
|
---|
| 1124 | if (limit_bytes_to_format && (end_offset - string_min <= address))
|
---|
| 1125 | break;
|
---|
| 1126 | i = 0;
|
---|
| 1127 | while (!limit_bytes_to_format || address < end_offset) {
|
---|
| 1128 | if (i == bufsize) {
|
---|
| 1129 | bufsize += bufsize/8;
|
---|
| 1130 | buf = xrealloc(buf, bufsize);
|
---|
| 1131 | }
|
---|
| 1132 | read_char(&c);
|
---|
| 1133 | if (c < 0) { /* EOF */
|
---|
| 1134 | free(buf);
|
---|
| 1135 | return;
|
---|
| 1136 | }
|
---|
| 1137 | address++;
|
---|
| 1138 | if (!c)
|
---|
| 1139 | break;
|
---|
| 1140 | if (!ISPRINT(c))
|
---|
| 1141 | goto tryline; /* It isn't; give up on this string. */
|
---|
| 1142 | buf[i++] = c; /* String continues; store it all. */
|
---|
| 1143 | }
|
---|
| 1144 |
|
---|
| 1145 | if (i < string_min) /* Too short! */
|
---|
| 1146 | goto tryline;
|
---|
| 1147 |
|
---|
| 1148 | /* If we get here, the string is all printable and NUL-terminated,
|
---|
| 1149 | * so print it. It is all in 'buf' and 'i' is its length. */
|
---|
| 1150 | buf[i] = 0;
|
---|
| 1151 | format_address(address - i - 1, ' ');
|
---|
| 1152 |
|
---|
| 1153 | for (i = 0; (c = buf[i]); i++) {
|
---|
| 1154 | switch (c) {
|
---|
| 1155 | case '\007': fputs("\\a", stdout); break;
|
---|
| 1156 | case '\b': fputs("\\b", stdout); break;
|
---|
| 1157 | case '\f': fputs("\\f", stdout); break;
|
---|
| 1158 | case '\n': fputs("\\n", stdout); break;
|
---|
| 1159 | case '\r': fputs("\\r", stdout); break;
|
---|
| 1160 | case '\t': fputs("\\t", stdout); break;
|
---|
| 1161 | case '\v': fputs("\\v", stdout); break;
|
---|
| 1162 | default: putchar(c);
|
---|
| 1163 | }
|
---|
| 1164 | }
|
---|
| 1165 | putchar('\n');
|
---|
| 1166 | }
|
---|
| 1167 |
|
---|
| 1168 | /* We reach this point only if we search through
|
---|
| 1169 | (max_bytes_to_format - string_min) bytes before reaching EOF. */
|
---|
| 1170 | free(buf);
|
---|
| 1171 |
|
---|
| 1172 | check_and_close();
|
---|
| 1173 | }
|
---|
| 1174 |
|
---|
| 1175 | int od_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 1176 | int od_main(int argc, char **argv)
|
---|
| 1177 | {
|
---|
| 1178 | static const struct suffix_mult bkm[] = {
|
---|
| 1179 | { "b", 512 },
|
---|
| 1180 | { "k", 1024 },
|
---|
| 1181 | { "m", 1024*1024 },
|
---|
| 1182 | { "", 0 }
|
---|
| 1183 | };
|
---|
| 1184 | enum {
|
---|
| 1185 | OPT_A = 1 << 0,
|
---|
| 1186 | OPT_N = 1 << 1,
|
---|
| 1187 | OPT_a = 1 << 2,
|
---|
| 1188 | OPT_b = 1 << 3,
|
---|
| 1189 | OPT_c = 1 << 4,
|
---|
| 1190 | OPT_d = 1 << 5,
|
---|
| 1191 | OPT_f = 1 << 6,
|
---|
| 1192 | OPT_h = 1 << 7,
|
---|
| 1193 | OPT_i = 1 << 8,
|
---|
| 1194 | OPT_j = 1 << 9,
|
---|
| 1195 | OPT_l = 1 << 10,
|
---|
| 1196 | OPT_o = 1 << 11,
|
---|
| 1197 | OPT_t = 1 << 12,
|
---|
| 1198 | OPT_v = 1 << 13,
|
---|
| 1199 | OPT_x = 1 << 14,
|
---|
| 1200 | OPT_s = 1 << 15,
|
---|
| 1201 | OPT_S = 1 << 16,
|
---|
| 1202 | OPT_w = 1 << 17,
|
---|
| 1203 | OPT_traditional = (1 << 18) * ENABLE_LONG_OPTS,
|
---|
| 1204 | };
|
---|
| 1205 | #if ENABLE_LONG_OPTS
|
---|
| 1206 | static const char od_longopts[] ALIGN1 =
|
---|
| 1207 | "skip-bytes\0" Required_argument "j"
|
---|
| 1208 | "address-radix\0" Required_argument "A"
|
---|
| 1209 | "read-bytes\0" Required_argument "N"
|
---|
| 1210 | "format\0" Required_argument "t"
|
---|
| 1211 | "output-duplicates\0" No_argument "v"
|
---|
| 1212 | "strings\0" Optional_argument "S"
|
---|
| 1213 | "width\0" Optional_argument "w"
|
---|
| 1214 | "traditional\0" No_argument "\xff"
|
---|
| 1215 | ;
|
---|
| 1216 | #endif
|
---|
| 1217 | char *str_A, *str_N, *str_j, *str_S;
|
---|
| 1218 | llist_t *lst_t = NULL;
|
---|
| 1219 | unsigned opt;
|
---|
| 1220 | int l_c_m;
|
---|
| 1221 | /* The old-style 'pseudo starting address' to be printed in parentheses
|
---|
| 1222 | after any true address. */
|
---|
| 1223 | off_t pseudo_start = pseudo_start; // for gcc
|
---|
| 1224 | /* The number of input bytes to skip before formatting and writing. */
|
---|
| 1225 | off_t n_bytes_to_skip = 0;
|
---|
| 1226 | /* The offset of the first byte after the last byte to be formatted. */
|
---|
| 1227 | off_t end_offset = 0;
|
---|
| 1228 | /* The maximum number of bytes that will be formatted. */
|
---|
| 1229 | off_t max_bytes_to_format = 0;
|
---|
| 1230 |
|
---|
| 1231 | spec = NULL;
|
---|
| 1232 | format_address = format_address_std;
|
---|
| 1233 | address_base_char = 'o';
|
---|
| 1234 | address_pad_len_char = '7';
|
---|
| 1235 | /* flag_dump_strings = 0; - already is */
|
---|
| 1236 |
|
---|
| 1237 | /* Parse command line */
|
---|
| 1238 | opt_complementary = "w+:t::"; /* -w N, -t is a list */
|
---|
| 1239 | #if ENABLE_LONG_OPTS
|
---|
| 1240 | applet_long_options = od_longopts;
|
---|
| 1241 | #endif
|
---|
| 1242 | opt = getopt32(argv, "A:N:abcdfhij:lot:vxsS:"
|
---|
| 1243 | "w::", // -w with optional param
|
---|
| 1244 | // -S was -s and also had optional parameter
|
---|
| 1245 | // but in coreutils 6.3 it was renamed and now has
|
---|
| 1246 | // _mandatory_ parameter
|
---|
| 1247 | &str_A, &str_N, &str_j, &lst_t, &str_S, &bytes_per_block);
|
---|
| 1248 | argc -= optind;
|
---|
| 1249 | argv += optind;
|
---|
| 1250 | if (opt & OPT_A) {
|
---|
| 1251 | static const char doxn[] ALIGN1 = "doxn";
|
---|
| 1252 | static const char doxn_address_base_char[] ALIGN1 = {
|
---|
| 1253 | 'u', 'o', 'x', /* '?' fourth one is not important */
|
---|
| 1254 | };
|
---|
| 1255 | static const uint8_t doxn_address_pad_len_char[] ALIGN1 = {
|
---|
| 1256 | '7', '7', '6', /* '?' */
|
---|
| 1257 | };
|
---|
| 1258 | char *p;
|
---|
| 1259 | int pos;
|
---|
| 1260 | p = strchr(doxn, str_A[0]);
|
---|
| 1261 | if (!p)
|
---|
| 1262 | bb_error_msg_and_die("bad output address radix "
|
---|
| 1263 | "'%c' (must be [doxn])", str_A[0]);
|
---|
| 1264 | pos = p - doxn;
|
---|
| 1265 | if (pos == 3) format_address = format_address_none;
|
---|
| 1266 | address_base_char = doxn_address_base_char[pos];
|
---|
| 1267 | address_pad_len_char = doxn_address_pad_len_char[pos];
|
---|
| 1268 | }
|
---|
| 1269 | if (opt & OPT_N) {
|
---|
| 1270 | limit_bytes_to_format = 1;
|
---|
| 1271 | max_bytes_to_format = xstrtooff_sfx(str_N, 0, bkm);
|
---|
| 1272 | }
|
---|
| 1273 | if (opt & OPT_a) decode_format_string("a");
|
---|
| 1274 | if (opt & OPT_b) decode_format_string("oC");
|
---|
| 1275 | if (opt & OPT_c) decode_format_string("c");
|
---|
| 1276 | if (opt & OPT_d) decode_format_string("u2");
|
---|
| 1277 | if (opt & OPT_f) decode_format_string("fF");
|
---|
| 1278 | if (opt & OPT_h) decode_format_string("x2");
|
---|
| 1279 | if (opt & OPT_i) decode_format_string("d2");
|
---|
| 1280 | if (opt & OPT_j) n_bytes_to_skip = xstrtooff_sfx(str_j, 0, bkm);
|
---|
| 1281 | if (opt & OPT_l) decode_format_string("d4");
|
---|
| 1282 | if (opt & OPT_o) decode_format_string("o2");
|
---|
| 1283 | //if (opt & OPT_t)...
|
---|
| 1284 | while (lst_t) {
|
---|
| 1285 | decode_format_string(llist_pop(&lst_t));
|
---|
| 1286 | }
|
---|
| 1287 | if (opt & OPT_v) verbose = 1;
|
---|
| 1288 | if (opt & OPT_x) decode_format_string("x2");
|
---|
| 1289 | if (opt & OPT_s) decode_format_string("d2");
|
---|
| 1290 | if (opt & OPT_S) {
|
---|
| 1291 | string_min = 3;
|
---|
| 1292 | string_min = xstrtou_sfx(str_S, 0, bkm);
|
---|
| 1293 | flag_dump_strings = 1;
|
---|
| 1294 | }
|
---|
| 1295 | //if (opt & OPT_w)...
|
---|
| 1296 | //if (opt & OPT_traditional)...
|
---|
| 1297 |
|
---|
| 1298 | if (flag_dump_strings && n_specs > 0)
|
---|
| 1299 | bb_error_msg_and_die("no type may be specified when dumping strings");
|
---|
| 1300 |
|
---|
| 1301 | /* If the --traditional option is used, there may be from
|
---|
| 1302 | * 0 to 3 remaining command line arguments; handle each case
|
---|
| 1303 | * separately.
|
---|
| 1304 | * od [file] [[+]offset[.][b] [[+]label[.][b]]]
|
---|
| 1305 | * The offset and pseudo_start have the same syntax.
|
---|
| 1306 | *
|
---|
| 1307 | * FIXME: POSIX 1003.1-2001 with XSI requires support for the
|
---|
| 1308 | * traditional syntax even if --traditional is not given. */
|
---|
| 1309 |
|
---|
| 1310 | #if ENABLE_LONG_OPTS
|
---|
| 1311 | if (opt & OPT_traditional) {
|
---|
| 1312 | off_t o1, o2;
|
---|
| 1313 |
|
---|
| 1314 | if (argc == 1) {
|
---|
| 1315 | if (parse_old_offset(argv[0], &o1)) {
|
---|
| 1316 | n_bytes_to_skip = o1;
|
---|
| 1317 | --argc;
|
---|
| 1318 | ++argv;
|
---|
| 1319 | }
|
---|
| 1320 | } else if (argc == 2) {
|
---|
| 1321 | if (parse_old_offset(argv[0], &o1)
|
---|
| 1322 | && parse_old_offset(argv[1], &o2)
|
---|
| 1323 | ) {
|
---|
| 1324 | n_bytes_to_skip = o1;
|
---|
| 1325 | flag_pseudo_start = 1;
|
---|
| 1326 | pseudo_start = o2;
|
---|
| 1327 | argv += 2;
|
---|
| 1328 | argc -= 2;
|
---|
| 1329 | } else if (parse_old_offset(argv[1], &o2)) {
|
---|
| 1330 | n_bytes_to_skip = o2;
|
---|
| 1331 | --argc;
|
---|
| 1332 | argv[1] = argv[0];
|
---|
| 1333 | ++argv;
|
---|
| 1334 | } else {
|
---|
| 1335 | bb_error_msg_and_die("invalid second operand "
|
---|
| 1336 | "in compatibility mode '%s'", argv[1]);
|
---|
| 1337 | }
|
---|
| 1338 | } else if (argc == 3) {
|
---|
| 1339 | if (parse_old_offset(argv[1], &o1)
|
---|
| 1340 | && parse_old_offset(argv[2], &o2)
|
---|
| 1341 | ) {
|
---|
| 1342 | n_bytes_to_skip = o1;
|
---|
| 1343 | flag_pseudo_start = 1;
|
---|
| 1344 | pseudo_start = o2;
|
---|
| 1345 | argv[2] = argv[0];
|
---|
| 1346 | argv += 2;
|
---|
| 1347 | argc -= 2;
|
---|
| 1348 | } else {
|
---|
| 1349 | bb_error_msg_and_die("in compatibility mode "
|
---|
| 1350 | "the last two arguments must be offsets");
|
---|
| 1351 | }
|
---|
| 1352 | } else if (argc > 3) {
|
---|
| 1353 | bb_error_msg_and_die("compatibility mode supports "
|
---|
| 1354 | "at most three arguments");
|
---|
| 1355 | }
|
---|
| 1356 |
|
---|
| 1357 | if (flag_pseudo_start) {
|
---|
| 1358 | if (format_address == format_address_none) {
|
---|
| 1359 | address_base_char = 'o';
|
---|
| 1360 | address_pad_len_char = '7';
|
---|
| 1361 | format_address = format_address_paren;
|
---|
| 1362 | } else
|
---|
| 1363 | format_address = format_address_label;
|
---|
| 1364 | }
|
---|
| 1365 | }
|
---|
| 1366 | #endif
|
---|
| 1367 |
|
---|
| 1368 | if (limit_bytes_to_format) {
|
---|
| 1369 | end_offset = n_bytes_to_skip + max_bytes_to_format;
|
---|
| 1370 | if (end_offset < n_bytes_to_skip)
|
---|
| 1371 | bb_error_msg_and_die("skip-bytes + read-bytes is too large");
|
---|
| 1372 | }
|
---|
| 1373 |
|
---|
| 1374 | if (n_specs == 0) {
|
---|
| 1375 | decode_format_string("o2");
|
---|
| 1376 | n_specs = 1;
|
---|
| 1377 | }
|
---|
| 1378 |
|
---|
| 1379 | /* If no files were listed on the command line,
|
---|
| 1380 | set the global pointer FILE_LIST so that it
|
---|
| 1381 | references the null-terminated list of one name: "-". */
|
---|
| 1382 | file_list = bb_argv_dash;
|
---|
| 1383 | if (argc > 0) {
|
---|
| 1384 | /* Set the global pointer FILE_LIST so that it
|
---|
| 1385 | references the first file-argument on the command-line. */
|
---|
| 1386 | file_list = (char const *const *) argv;
|
---|
| 1387 | }
|
---|
| 1388 |
|
---|
| 1389 | /* open the first input file */
|
---|
| 1390 | open_next_file();
|
---|
| 1391 | /* skip over any unwanted header bytes */
|
---|
| 1392 | skip(n_bytes_to_skip);
|
---|
| 1393 | if (!in_stream)
|
---|
| 1394 | return EXIT_FAILURE;
|
---|
| 1395 |
|
---|
| 1396 | pseudo_offset = (flag_pseudo_start ? pseudo_start - n_bytes_to_skip : 0);
|
---|
| 1397 |
|
---|
| 1398 | /* Compute output block length. */
|
---|
| 1399 | l_c_m = get_lcm();
|
---|
| 1400 |
|
---|
| 1401 | if (opt & OPT_w) { /* -w: width */
|
---|
| 1402 | if (!bytes_per_block || bytes_per_block % l_c_m != 0) {
|
---|
| 1403 | bb_error_msg("warning: invalid width %u; using %d instead",
|
---|
| 1404 | (unsigned)bytes_per_block, l_c_m);
|
---|
| 1405 | bytes_per_block = l_c_m;
|
---|
| 1406 | }
|
---|
| 1407 | } else {
|
---|
| 1408 | bytes_per_block = l_c_m;
|
---|
| 1409 | if (l_c_m < DEFAULT_BYTES_PER_BLOCK)
|
---|
| 1410 | bytes_per_block *= DEFAULT_BYTES_PER_BLOCK / l_c_m;
|
---|
| 1411 | }
|
---|
| 1412 |
|
---|
| 1413 | #ifdef DEBUG
|
---|
| 1414 | for (i = 0; i < n_specs; i++) {
|
---|
| 1415 | printf("%d: fmt=\"%s\" width=%d\n",
|
---|
| 1416 | i, spec[i].fmt_string, width_bytes[spec[i].size]);
|
---|
| 1417 | }
|
---|
| 1418 | #endif
|
---|
| 1419 |
|
---|
| 1420 | if (flag_dump_strings)
|
---|
| 1421 | dump_strings(n_bytes_to_skip, end_offset);
|
---|
| 1422 | else
|
---|
| 1423 | dump(n_bytes_to_skip, end_offset);
|
---|
| 1424 |
|
---|
| 1425 | if (fclose(stdin) == EOF)
|
---|
| 1426 | bb_perror_msg_and_die(bb_msg_standard_input);
|
---|
| 1427 |
|
---|
| 1428 | return ioerror;
|
---|
| 1429 | }
|
---|