blob: 6b00a4381da50bf90e75d4c82fff915ffe3393bc
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 | /* Busyboxed by Denys Vlasenko, based on od.c from coreutils-5.2.1 */ |
20 | |
21 | |
22 | /* #include "libbb.h" - done in od.c */ |
23 | #define assert(a) ((void)0) |
24 | |
25 | |
26 | //usage:#if ENABLE_DESKTOP |
27 | //usage:#define od_trivial_usage |
28 | //usage: "[-abcdfhilovxs] [-t TYPE] [-A RADIX] [-N SIZE] [-j SKIP] [-S MINSTR] [-w WIDTH] [FILE]..." |
29 | // We don't support: |
30 | // ... [FILE] [[+]OFFSET[.][b]] |
31 | // Support is buggy for: |
32 | // od --traditional [OPTION]... [FILE] [[+]OFFSET[.][b] [+][LABEL][.][b]] |
33 | |
34 | //usage:#define od_full_usage "\n\n" |
35 | //usage: "Print FILEs (or stdin) unambiguously, as octal bytes by default" |
36 | //usage:#endif |
37 | |
38 | enum { |
39 | OPT_A = 1 << 0, |
40 | OPT_N = 1 << 1, |
41 | OPT_a = 1 << 2, |
42 | OPT_b = 1 << 3, |
43 | OPT_c = 1 << 4, |
44 | OPT_d = 1 << 5, |
45 | OPT_f = 1 << 6, |
46 | OPT_h = 1 << 7, |
47 | OPT_i = 1 << 8, |
48 | OPT_j = 1 << 9, |
49 | OPT_l = 1 << 10, |
50 | OPT_o = 1 << 11, |
51 | OPT_t = 1 << 12, |
52 | /* When zero and two or more consecutive blocks are equal, format |
53 | only the first block and output an asterisk alone on the following |
54 | line to indicate that identical blocks have been elided: */ |
55 | OPT_v = 1 << 13, |
56 | OPT_x = 1 << 14, |
57 | OPT_s = 1 << 15, |
58 | OPT_S = 1 << 16, |
59 | OPT_w = 1 << 17, |
60 | OPT_traditional = (1 << 18) * ENABLE_LONG_OPTS, |
61 | }; |
62 | |
63 | #define OD_GETOPT32() getopt32(argv, \ |
64 | "A:N:abcdfhij:lot:vxsS:w::", \ |
65 | /* -w with optional param */ \ |
66 | /* -S was -s and also had optional parameter */ \ |
67 | /* but in coreutils 6.3 it was renamed and now has */ \ |
68 | /* _mandatory_ parameter */ \ |
69 | &str_A, &str_N, &str_j, &lst_t, &str_S, &bytes_per_block) |
70 | |
71 | |
72 | /* Check for 0x7f is a coreutils 6.3 addition */ |
73 | #define ISPRINT(c) (((c) >= ' ') && (c) < 0x7f) |
74 | |
75 | typedef long double longdouble_t; |
76 | typedef unsigned long long ulonglong_t; |
77 | typedef long long llong; |
78 | |
79 | #if ENABLE_LFS |
80 | # define xstrtooff_sfx xstrtoull_sfx |
81 | #else |
82 | # define xstrtooff_sfx xstrtoul_sfx |
83 | #endif |
84 | |
85 | /* The default number of input bytes per output line. */ |
86 | #define DEFAULT_BYTES_PER_BLOCK 16 |
87 | |
88 | /* The number of decimal digits of precision in a float. */ |
89 | #ifndef FLT_DIG |
90 | # define FLT_DIG 7 |
91 | #endif |
92 | |
93 | /* The number of decimal digits of precision in a double. */ |
94 | #ifndef DBL_DIG |
95 | # define DBL_DIG 15 |
96 | #endif |
97 | |
98 | /* The number of decimal digits of precision in a long double. */ |
99 | #ifndef LDBL_DIG |
100 | # define LDBL_DIG DBL_DIG |
101 | #endif |
102 | |
103 | enum size_spec { |
104 | NO_SIZE, |
105 | CHAR, |
106 | SHORT, |
107 | INT, |
108 | LONG, |
109 | LONG_LONG, |
110 | FLOAT_SINGLE, |
111 | FLOAT_DOUBLE, |
112 | FLOAT_LONG_DOUBLE, |
113 | N_SIZE_SPECS |
114 | }; |
115 | |
116 | enum output_format { |
117 | SIGNED_DECIMAL, |
118 | UNSIGNED_DECIMAL, |
119 | OCTAL, |
120 | HEXADECIMAL, |
121 | FLOATING_POINT, |
122 | NAMED_CHARACTER, |
123 | CHARACTER |
124 | }; |
125 | |
126 | /* Each output format specification (from '-t spec' or from |
127 | old-style options) is represented by one of these structures. */ |
128 | struct tspec { |
129 | enum output_format fmt; |
130 | enum size_spec size; |
131 | void (*print_function) (size_t, const char *, const char *); |
132 | char *fmt_string; |
133 | int hexl_mode_trailer; |
134 | int field_width; |
135 | }; |
136 | |
137 | /* Convert the number of 8-bit bytes of a binary representation to |
138 | the number of characters (digits + sign if the type is signed) |
139 | required to represent the same quantity in the specified base/type. |
140 | For example, a 32-bit (4-byte) quantity may require a field width |
141 | as wide as the following for these types: |
142 | 11 unsigned octal |
143 | 11 signed decimal |
144 | 10 unsigned decimal |
145 | 8 unsigned hexadecimal */ |
146 | |
147 | static const uint8_t bytes_to_oct_digits[] ALIGN1 = |
148 | {0, 3, 6, 8, 11, 14, 16, 19, 22, 25, 27, 30, 32, 35, 38, 41, 43}; |
149 | |
150 | static const uint8_t bytes_to_signed_dec_digits[] ALIGN1 = |
151 | {1, 4, 6, 8, 11, 13, 16, 18, 20, 23, 25, 28, 30, 33, 35, 37, 40}; |
152 | |
153 | static const uint8_t bytes_to_unsigned_dec_digits[] ALIGN1 = |
154 | {0, 3, 5, 8, 10, 13, 15, 17, 20, 22, 25, 27, 29, 32, 34, 37, 39}; |
155 | |
156 | static const uint8_t bytes_to_hex_digits[] ALIGN1 = |
157 | {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32}; |
158 | |
159 | /* Convert enum size_spec to the size of the named type. */ |
160 | static const signed char width_bytes[] ALIGN1 = { |
161 | -1, |
162 | sizeof(char), |
163 | sizeof(short), |
164 | sizeof(int), |
165 | sizeof(long), |
166 | sizeof(ulonglong_t), |
167 | sizeof(float), |
168 | sizeof(double), |
169 | sizeof(longdouble_t) |
170 | }; |
171 | /* Ensure that for each member of 'enum size_spec' there is an |
172 | initializer in the width_bytes array. */ |
173 | struct ERR_width_bytes_has_bad_size { |
174 | char ERR_width_bytes_has_bad_size[ARRAY_SIZE(width_bytes) == N_SIZE_SPECS ? 1 : -1]; |
175 | }; |
176 | |
177 | static smallint exit_code; |
178 | |
179 | static unsigned string_min; |
180 | |
181 | /* An array of specs describing how to format each input block. */ |
182 | static size_t n_specs; |
183 | static struct tspec *spec; |
184 | |
185 | /* Function that accepts an address and an optional following char, |
186 | and prints the address and char to stdout. */ |
187 | static void (*format_address)(off_t, char); |
188 | /* The difference between the old-style pseudo starting address and |
189 | the number of bytes to skip. */ |
190 | #if ENABLE_LONG_OPTS |
191 | static off_t pseudo_offset; |
192 | #else |
193 | enum { pseudo_offset = 0 }; |
194 | #endif |
195 | /* When zero, MAX_BYTES_TO_FORMAT and END_OFFSET are ignored, and all |
196 | input is formatted. */ |
197 | |
198 | /* The number of input bytes formatted per output line. It must be |
199 | a multiple of the least common multiple of the sizes associated with |
200 | the specified output types. It should be as large as possible, but |
201 | no larger than 16 -- unless specified with the -w option. */ |
202 | static unsigned bytes_per_block = 32; /* have to use unsigned, not size_t */ |
203 | |
204 | /* A NULL-terminated list of the file-arguments from the command line. */ |
205 | static const char *const *file_list; |
206 | |
207 | /* The input stream associated with the current file. */ |
208 | static FILE *in_stream; |
209 | |
210 | #define MAX_INTEGRAL_TYPE_SIZE sizeof(ulonglong_t) |
211 | static const unsigned char integral_type_size[MAX_INTEGRAL_TYPE_SIZE + 1] ALIGN1 = { |
212 | [sizeof(char)] = CHAR, |
213 | #if USHRT_MAX != UCHAR_MAX |
214 | [sizeof(short)] = SHORT, |
215 | #endif |
216 | #if UINT_MAX != USHRT_MAX |
217 | [sizeof(int)] = INT, |
218 | #endif |
219 | #if ULONG_MAX != UINT_MAX |
220 | [sizeof(long)] = LONG, |
221 | #endif |
222 | #if ULLONG_MAX != ULONG_MAX |
223 | [sizeof(ulonglong_t)] = LONG_LONG, |
224 | #endif |
225 | }; |
226 | |
227 | #define MAX_FP_TYPE_SIZE sizeof(longdouble_t) |
228 | static const unsigned char fp_type_size[MAX_FP_TYPE_SIZE + 1] ALIGN1 = { |
229 | /* gcc seems to allow repeated indexes. Last one wins */ |
230 | [sizeof(longdouble_t)] = FLOAT_LONG_DOUBLE, |
231 | [sizeof(double)] = FLOAT_DOUBLE, |
232 | [sizeof(float)] = FLOAT_SINGLE |
233 | }; |
234 | |
235 | |
236 | static unsigned |
237 | gcd(unsigned u, unsigned v) |
238 | { |
239 | unsigned t; |
240 | while (v != 0) { |
241 | t = u % v; |
242 | u = v; |
243 | v = t; |
244 | } |
245 | return u; |
246 | } |
247 | |
248 | /* Compute the least common multiple of U and V. */ |
249 | static unsigned |
250 | lcm(unsigned u, unsigned v) { |
251 | unsigned t = gcd(u, v); |
252 | if (t == 0) |
253 | return 0; |
254 | return u * v / t; |
255 | } |
256 | |
257 | static void |
258 | print_s_char(size_t n_bytes, const char *block, const char *fmt_string) |
259 | { |
260 | while (n_bytes--) { |
261 | int tmp = *(signed char *) block; |
262 | printf(fmt_string, tmp); |
263 | block += sizeof(unsigned char); |
264 | } |
265 | } |
266 | |
267 | static void |
268 | print_char(size_t n_bytes, const char *block, const char *fmt_string) |
269 | { |
270 | while (n_bytes--) { |
271 | unsigned tmp = *(unsigned char *) block; |
272 | printf(fmt_string, tmp); |
273 | block += sizeof(unsigned char); |
274 | } |
275 | } |
276 | |
277 | static void |
278 | print_s_short(size_t n_bytes, const char *block, const char *fmt_string) |
279 | { |
280 | n_bytes /= sizeof(signed short); |
281 | while (n_bytes--) { |
282 | int tmp = *(signed short *) block; |
283 | printf(fmt_string, tmp); |
284 | block += sizeof(unsigned short); |
285 | } |
286 | } |
287 | |
288 | static void |
289 | print_short(size_t n_bytes, const char *block, const char *fmt_string) |
290 | { |
291 | n_bytes /= sizeof(unsigned short); |
292 | while (n_bytes--) { |
293 | unsigned tmp = *(unsigned short *) block; |
294 | printf(fmt_string, tmp); |
295 | block += sizeof(unsigned short); |
296 | } |
297 | } |
298 | |
299 | static void |
300 | print_int(size_t n_bytes, const char *block, const char *fmt_string) |
301 | { |
302 | n_bytes /= sizeof(unsigned); |
303 | while (n_bytes--) { |
304 | unsigned tmp = *(unsigned *) block; |
305 | printf(fmt_string, tmp); |
306 | block += sizeof(unsigned); |
307 | } |
308 | } |
309 | |
310 | #if UINT_MAX == ULONG_MAX |
311 | # define print_long print_int |
312 | #else |
313 | static void |
314 | print_long(size_t n_bytes, const char *block, const char *fmt_string) |
315 | { |
316 | n_bytes /= sizeof(unsigned long); |
317 | while (n_bytes--) { |
318 | unsigned long tmp = *(unsigned long *) block; |
319 | printf(fmt_string, tmp); |
320 | block += sizeof(unsigned long); |
321 | } |
322 | } |
323 | #endif |
324 | |
325 | #if ULONG_MAX == ULLONG_MAX |
326 | # define print_long_long print_long |
327 | #else |
328 | static void |
329 | print_long_long(size_t n_bytes, const char *block, const char *fmt_string) |
330 | { |
331 | n_bytes /= sizeof(ulonglong_t); |
332 | while (n_bytes--) { |
333 | ulonglong_t tmp = *(ulonglong_t *) block; |
334 | printf(fmt_string, tmp); |
335 | block += sizeof(ulonglong_t); |
336 | } |
337 | } |
338 | #endif |
339 | |
340 | static void |
341 | print_float(size_t n_bytes, const char *block, const char *fmt_string) |
342 | { |
343 | n_bytes /= sizeof(float); |
344 | while (n_bytes--) { |
345 | float tmp = *(float *) block; |
346 | printf(fmt_string, tmp); |
347 | block += sizeof(float); |
348 | } |
349 | } |
350 | |
351 | static void |
352 | print_double(size_t n_bytes, const char *block, const char *fmt_string) |
353 | { |
354 | n_bytes /= sizeof(double); |
355 | while (n_bytes--) { |
356 | double tmp = *(double *) block; |
357 | printf(fmt_string, tmp); |
358 | block += sizeof(double); |
359 | } |
360 | } |
361 | |
362 | static void |
363 | print_long_double(size_t n_bytes, const char *block, const char *fmt_string) |
364 | { |
365 | n_bytes /= sizeof(longdouble_t); |
366 | while (n_bytes--) { |
367 | longdouble_t tmp = *(longdouble_t *) block; |
368 | printf(fmt_string, tmp); |
369 | block += sizeof(longdouble_t); |
370 | } |
371 | } |
372 | |
373 | /* print_[named]_ascii are optimized for speed. |
374 | * Remember, someday you may want to pump gigabytes through this thing. |
375 | * Saving a dozen of .text bytes here is counter-productive */ |
376 | |
377 | static void |
378 | print_named_ascii(size_t n_bytes, const char *block, |
379 | const char *unused_fmt_string UNUSED_PARAM) |
380 | { |
381 | /* Names for some non-printing characters. */ |
382 | static const char charname[33][3] ALIGN1 = { |
383 | "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel", |
384 | " bs", " ht", " nl", " vt", " ff", " cr", " so", " si", |
385 | "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb", |
386 | "can", " em", "sub", "esc", " fs", " gs", " rs", " us", |
387 | " sp" |
388 | }; |
389 | // buf[N] pos: 01234 56789 |
390 | char buf[12] = " x\0 0xx\0"; |
391 | // actually " x\0 xxx\0", but want to share string with print_ascii. |
392 | // [12] because we take three 32bit stack slots anyway, and |
393 | // gcc is too dumb to initialize with constant stores, |
394 | // it copies initializer from rodata. Oh well. |
395 | |
396 | while (n_bytes--) { |
397 | unsigned masked_c = *(unsigned char *) block++; |
398 | |
399 | masked_c &= 0x7f; |
400 | if (masked_c == 0x7f) { |
401 | fputs(" del", stdout); |
402 | continue; |
403 | } |
404 | if (masked_c > ' ') { |
405 | buf[3] = masked_c; |
406 | fputs(buf, stdout); |
407 | continue; |
408 | } |
409 | /* Why? Because printf(" %3.3s") is much slower... */ |
410 | buf[6] = charname[masked_c][0]; |
411 | buf[7] = charname[masked_c][1]; |
412 | buf[8] = charname[masked_c][2]; |
413 | fputs(buf+5, stdout); |
414 | } |
415 | } |
416 | |
417 | static void |
418 | print_ascii(size_t n_bytes, const char *block, |
419 | const char *unused_fmt_string UNUSED_PARAM) |
420 | { |
421 | // buf[N] pos: 01234 56789 |
422 | char buf[12] = " x\0 0xx\0"; |
423 | |
424 | while (n_bytes--) { |
425 | const char *s; |
426 | unsigned c = *(unsigned char *) block++; |
427 | |
428 | if (ISPRINT(c)) { |
429 | buf[3] = c; |
430 | fputs(buf, stdout); |
431 | continue; |
432 | } |
433 | switch (c) { |
434 | case '\0': |
435 | s = " \\0"; |
436 | break; |
437 | case '\007': |
438 | s = " \\a"; |
439 | break; |
440 | case '\b': |
441 | s = " \\b"; |
442 | break; |
443 | case '\f': |
444 | s = " \\f"; |
445 | break; |
446 | case '\n': |
447 | s = " \\n"; |
448 | break; |
449 | case '\r': |
450 | s = " \\r"; |
451 | break; |
452 | case '\t': |
453 | s = " \\t"; |
454 | break; |
455 | case '\v': |
456 | s = " \\v"; |
457 | break; |
458 | case '\x7f': |
459 | s = " 177"; |
460 | break; |
461 | default: /* c is never larger than 040 */ |
462 | buf[7] = (c >> 3) + '0'; |
463 | buf[8] = (c & 7) + '0'; |
464 | s = buf + 5; |
465 | } |
466 | fputs(s, stdout); |
467 | } |
468 | } |
469 | |
470 | /* Given a list of one or more input filenames FILE_LIST, set the global |
471 | file pointer IN_STREAM and the global string INPUT_FILENAME to the |
472 | first one that can be successfully opened. Modify FILE_LIST to |
473 | reference the next filename in the list. A file name of "-" is |
474 | interpreted as standard input. If any file open fails, give an error |
475 | message and return nonzero. */ |
476 | |
477 | static void |
478 | open_next_file(void) |
479 | { |
480 | while (1) { |
481 | if (!*file_list) |
482 | return; |
483 | in_stream = fopen_or_warn_stdin(*file_list++); |
484 | if (in_stream) { |
485 | break; |
486 | } |
487 | exit_code = 1; |
488 | } |
489 | |
490 | if ((option_mask32 & (OPT_N|OPT_S)) == OPT_N) |
491 | setbuf(in_stream, NULL); |
492 | } |
493 | |
494 | /* Test whether there have been errors on in_stream, and close it if |
495 | it is not standard input. Return nonzero if there has been an error |
496 | on in_stream or stdout; return zero otherwise. This function will |
497 | report more than one error only if both a read and a write error |
498 | have occurred. IN_ERRNO, if nonzero, is the error number |
499 | corresponding to the most recent action for IN_STREAM. */ |
500 | |
501 | static void |
502 | check_and_close(void) |
503 | { |
504 | if (in_stream) { |
505 | if (ferror(in_stream)) { |
506 | bb_error_msg("%s: read error", (in_stream == stdin) |
507 | ? bb_msg_standard_input |
508 | : file_list[-1] |
509 | ); |
510 | exit_code = 1; |
511 | } |
512 | fclose_if_not_stdin(in_stream); |
513 | in_stream = NULL; |
514 | } |
515 | |
516 | if (ferror(stdout)) { |
517 | bb_error_msg_and_die(bb_msg_write_error); |
518 | } |
519 | } |
520 | |
521 | /* If S points to a single valid modern od format string, put |
522 | a description of that format in *TSPEC, return pointer to |
523 | character following the just-decoded format. |
524 | For example, if S were "d4afL", we will return a rtp to "afL" |
525 | and *TSPEC would be |
526 | { |
527 | fmt = SIGNED_DECIMAL; |
528 | size = INT or LONG; (whichever integral_type_size[4] resolves to) |
529 | print_function = print_int; (assuming size == INT) |
530 | fmt_string = "%011d%c"; |
531 | } |
532 | S_ORIG is solely for reporting errors. It should be the full format |
533 | string argument. */ |
534 | |
535 | static NOINLINE const char * |
536 | decode_one_format(const char *s_orig, const char *s, struct tspec *tspec) |
537 | { |
538 | enum size_spec size_spec; |
539 | unsigned size; |
540 | enum output_format fmt; |
541 | const char *p; |
542 | char *end; |
543 | char *fmt_string = NULL; |
544 | void (*print_function) (size_t, const char *, const char *); |
545 | unsigned c; |
546 | unsigned field_width = 0; |
547 | int pos; |
548 | |
549 | switch (*s) { |
550 | case 'd': |
551 | case 'o': |
552 | case 'u': |
553 | case 'x': { |
554 | static const char CSIL[] ALIGN1 = "CSIL"; |
555 | |
556 | c = *s++; |
557 | p = strchr(CSIL, *s); |
558 | /* if *s == NUL, p != NULL! Testcase: "od -tx" */ |
559 | if (!p || *p == '\0') { |
560 | size = sizeof(int); |
561 | if (isdigit(s[0])) { |
562 | size = bb_strtou(s, &end, 0); |
563 | if (errno == ERANGE |
564 | || MAX_INTEGRAL_TYPE_SIZE < size |
565 | || integral_type_size[size] == NO_SIZE |
566 | ) { |
567 | bb_error_msg_and_die("invalid type string '%s'; " |
568 | "%u-byte %s type is not supported", |
569 | s_orig, size, "integral"); |
570 | } |
571 | s = end; |
572 | } |
573 | } else { |
574 | static const uint8_t CSIL_sizeof[4] = { |
575 | sizeof(char), |
576 | sizeof(short), |
577 | sizeof(int), |
578 | sizeof(long), |
579 | }; |
580 | size = CSIL_sizeof[p - CSIL]; |
581 | s++; /* skip C/S/I/L */ |
582 | } |
583 | |
584 | #define ISPEC_TO_FORMAT(Spec, Min_format, Long_format, Max_format) \ |
585 | ((Spec) == LONG_LONG ? (Max_format) \ |
586 | : ((Spec) == LONG ? (Long_format) : (Min_format))) |
587 | |
588 | #define FMT_BYTES_ALLOCATED 9 |
589 | size_spec = integral_type_size[size]; |
590 | |
591 | { |
592 | static const char doux[] ALIGN1 = "doux"; |
593 | static const char doux_fmt_letter[][4] = { |
594 | "lld", "llo", "llu", "llx" |
595 | }; |
596 | static const enum output_format doux_fmt[] = { |
597 | SIGNED_DECIMAL, |
598 | OCTAL, |
599 | UNSIGNED_DECIMAL, |
600 | HEXADECIMAL, |
601 | }; |
602 | static const uint8_t *const doux_bytes_to_XXX[] = { |
603 | bytes_to_signed_dec_digits, |
604 | bytes_to_oct_digits, |
605 | bytes_to_unsigned_dec_digits, |
606 | bytes_to_hex_digits, |
607 | }; |
608 | static const char doux_fmtstring[][sizeof(" %%0%u%s")] = { |
609 | " %%%u%s", |
610 | " %%0%u%s", |
611 | " %%%u%s", |
612 | " %%0%u%s", |
613 | }; |
614 | |
615 | pos = strchr(doux, c) - doux; |
616 | fmt = doux_fmt[pos]; |
617 | field_width = doux_bytes_to_XXX[pos][size]; |
618 | p = doux_fmt_letter[pos] + 2; |
619 | if (size_spec == LONG) p--; |
620 | if (size_spec == LONG_LONG) p -= 2; |
621 | fmt_string = xasprintf(doux_fmtstring[pos], field_width, p); |
622 | } |
623 | |
624 | switch (size_spec) { |
625 | case CHAR: |
626 | print_function = (fmt == SIGNED_DECIMAL |
627 | ? print_s_char |
628 | : print_char); |
629 | break; |
630 | case SHORT: |
631 | print_function = (fmt == SIGNED_DECIMAL |
632 | ? print_s_short |
633 | : print_short); |
634 | break; |
635 | case INT: |
636 | print_function = print_int; |
637 | break; |
638 | case LONG: |
639 | print_function = print_long; |
640 | break; |
641 | default: /* case LONG_LONG: */ |
642 | print_function = print_long_long; |
643 | break; |
644 | } |
645 | break; |
646 | } |
647 | |
648 | case 'f': { |
649 | static const char FDL[] ALIGN1 = "FDL"; |
650 | |
651 | fmt = FLOATING_POINT; |
652 | ++s; |
653 | p = strchr(FDL, *s); |
654 | if (!p) { |
655 | size = sizeof(double); |
656 | if (isdigit(s[0])) { |
657 | size = bb_strtou(s, &end, 0); |
658 | if (errno == ERANGE || size > MAX_FP_TYPE_SIZE |
659 | || fp_type_size[size] == NO_SIZE |
660 | ) { |
661 | bb_error_msg_and_die("invalid type string '%s'; " |
662 | "%u-byte %s type is not supported", |
663 | s_orig, size, "floating point"); |
664 | } |
665 | s = end; |
666 | } |
667 | } else { |
668 | static const uint8_t FDL_sizeof[] = { |
669 | sizeof(float), |
670 | sizeof(double), |
671 | sizeof(longdouble_t), |
672 | }; |
673 | |
674 | size = FDL_sizeof[p - FDL]; |
675 | } |
676 | |
677 | size_spec = fp_type_size[size]; |
678 | |
679 | switch (size_spec) { |
680 | case FLOAT_SINGLE: |
681 | print_function = print_float; |
682 | field_width = FLT_DIG + 8; |
683 | /* Don't use %#e; not all systems support it. */ |
684 | fmt_string = xasprintf(" %%%d.%de", field_width, FLT_DIG); |
685 | break; |
686 | case FLOAT_DOUBLE: |
687 | print_function = print_double; |
688 | field_width = DBL_DIG + 8; |
689 | fmt_string = xasprintf(" %%%d.%de", field_width, DBL_DIG); |
690 | break; |
691 | default: /* case FLOAT_LONG_DOUBLE: */ |
692 | print_function = print_long_double; |
693 | field_width = LDBL_DIG + 8; |
694 | fmt_string = xasprintf(" %%%d.%dLe", field_width, LDBL_DIG); |
695 | break; |
696 | } |
697 | break; |
698 | } |
699 | |
700 | case 'a': |
701 | ++s; |
702 | fmt = NAMED_CHARACTER; |
703 | size_spec = CHAR; |
704 | print_function = print_named_ascii; |
705 | field_width = 3; |
706 | break; |
707 | case 'c': |
708 | ++s; |
709 | fmt = CHARACTER; |
710 | size_spec = CHAR; |
711 | print_function = print_ascii; |
712 | field_width = 3; |
713 | break; |
714 | default: |
715 | bb_error_msg_and_die("invalid character '%c' " |
716 | "in type string '%s'", *s, s_orig); |
717 | } |
718 | |
719 | tspec->size = size_spec; |
720 | tspec->fmt = fmt; |
721 | tspec->print_function = print_function; |
722 | tspec->fmt_string = fmt_string; |
723 | |
724 | tspec->field_width = field_width; |
725 | tspec->hexl_mode_trailer = (*s == 'z'); |
726 | if (tspec->hexl_mode_trailer) |
727 | s++; |
728 | |
729 | return s; |
730 | } |
731 | |
732 | /* Decode the modern od format string S. Append the decoded |
733 | representation to the global array SPEC, reallocating SPEC if |
734 | necessary. */ |
735 | |
736 | static void |
737 | decode_format_string(const char *s) |
738 | { |
739 | const char *s_orig = s; |
740 | |
741 | while (*s != '\0') { |
742 | struct tspec tspec; |
743 | const char *next; |
744 | |
745 | next = decode_one_format(s_orig, s, &tspec); |
746 | |
747 | assert(s != next); |
748 | s = next; |
749 | spec = xrealloc_vector(spec, 4, n_specs); |
750 | memcpy(&spec[n_specs], &tspec, sizeof(spec[0])); |
751 | n_specs++; |
752 | } |
753 | } |
754 | |
755 | /* Given a list of one or more input filenames FILE_LIST, set the global |
756 | file pointer IN_STREAM to position N_SKIP in the concatenation of |
757 | those files. If any file operation fails or if there are fewer than |
758 | N_SKIP bytes in the combined input, give an error message and return |
759 | nonzero. When possible, use seek rather than read operations to |
760 | advance IN_STREAM. */ |
761 | |
762 | static void |
763 | skip(off_t n_skip) |
764 | { |
765 | if (n_skip == 0) |
766 | return; |
767 | |
768 | while (in_stream) { /* !EOF */ |
769 | struct stat file_stats; |
770 | |
771 | /* First try seeking. For large offsets, this extra work is |
772 | worthwhile. If the offset is below some threshold it may be |
773 | more efficient to move the pointer by reading. There are two |
774 | issues when trying to seek: |
775 | - the file must be seekable. |
776 | - before seeking to the specified position, make sure |
777 | that the new position is in the current file. |
778 | Try to do that by getting file's size using fstat. |
779 | But that will work only for regular files. */ |
780 | |
781 | /* The st_size field is valid only for regular files |
782 | (and for symbolic links, which cannot occur here). |
783 | If the number of bytes left to skip is at least |
784 | as large as the size of the current file, we can |
785 | decrement n_skip and go on to the next file. */ |
786 | if (fstat(fileno(in_stream), &file_stats) == 0 |
787 | && S_ISREG(file_stats.st_mode) && file_stats.st_size > 0 |
788 | ) { |
789 | if (file_stats.st_size < n_skip) { |
790 | n_skip -= file_stats.st_size; |
791 | /* take "check & close / open_next" route */ |
792 | } else { |
793 | if (fseeko(in_stream, n_skip, SEEK_CUR) != 0) |
794 | exit_code = 1; |
795 | return; |
796 | } |
797 | } else { |
798 | /* If it's not a regular file with positive size, |
799 | position the file pointer by reading. */ |
800 | char buf[1024]; |
801 | size_t n_bytes_to_read = 1024; |
802 | size_t n_bytes_read; |
803 | |
804 | while (n_skip > 0) { |
805 | if (n_skip < n_bytes_to_read) |
806 | n_bytes_to_read = n_skip; |
807 | n_bytes_read = fread(buf, 1, n_bytes_to_read, in_stream); |
808 | n_skip -= n_bytes_read; |
809 | if (n_bytes_read != n_bytes_to_read) |
810 | break; /* EOF on this file or error */ |
811 | } |
812 | } |
813 | if (n_skip == 0) |
814 | return; |
815 | |
816 | check_and_close(); |
817 | open_next_file(); |
818 | } |
819 | |
820 | if (n_skip) |
821 | bb_error_msg_and_die("can't skip past end of combined input"); |
822 | } |
823 | |
824 | |
825 | typedef void FN_format_address(off_t address, char c); |
826 | |
827 | static void |
828 | format_address_none(off_t address UNUSED_PARAM, char c UNUSED_PARAM) |
829 | { |
830 | } |
831 | |
832 | static char address_fmt[] ALIGN1 = "%0n"OFF_FMT"xc"; |
833 | /* Corresponds to 'x' above */ |
834 | #define address_base_char address_fmt[sizeof(address_fmt)-3] |
835 | /* Corresponds to 'n' above */ |
836 | #define address_pad_len_char address_fmt[2] |
837 | |
838 | static void |
839 | format_address_std(off_t address, char c) |
840 | { |
841 | /* Corresponds to 'c' */ |
842 | address_fmt[sizeof(address_fmt)-2] = c; |
843 | printf(address_fmt, address); |
844 | } |
845 | |
846 | #if ENABLE_LONG_OPTS |
847 | /* only used with --traditional */ |
848 | static void |
849 | format_address_paren(off_t address, char c) |
850 | { |
851 | putchar('('); |
852 | format_address_std(address, ')'); |
853 | if (c) putchar(c); |
854 | } |
855 | |
856 | static void |
857 | format_address_label(off_t address, char c) |
858 | { |
859 | format_address_std(address, ' '); |
860 | format_address_paren(address + pseudo_offset, c); |
861 | } |
862 | #endif |
863 | |
864 | static void |
865 | dump_hexl_mode_trailer(size_t n_bytes, const char *block) |
866 | { |
867 | fputs(" >", stdout); |
868 | while (n_bytes--) { |
869 | unsigned c = *(unsigned char *) block++; |
870 | c = (ISPRINT(c) ? c : '.'); |
871 | putchar(c); |
872 | } |
873 | putchar('<'); |
874 | } |
875 | |
876 | /* Write N_BYTES bytes from CURR_BLOCK to standard output once for each |
877 | of the N_SPEC format specs. CURRENT_OFFSET is the byte address of |
878 | CURR_BLOCK in the concatenation of input files, and it is printed |
879 | (optionally) only before the output line associated with the first |
880 | format spec. When duplicate blocks are being abbreviated, the output |
881 | for a sequence of identical input blocks is the output for the first |
882 | block followed by an asterisk alone on a line. It is valid to compare |
883 | the blocks PREV_BLOCK and CURR_BLOCK only when N_BYTES == BYTES_PER_BLOCK. |
884 | That condition may be false only for the last input block -- and then |
885 | only when it has not been padded to length BYTES_PER_BLOCK. */ |
886 | |
887 | static void |
888 | write_block(off_t current_offset, size_t n_bytes, |
889 | const char *prev_block, const char *curr_block) |
890 | { |
891 | static char first = 1; |
892 | static char prev_pair_equal = 0; |
893 | size_t i; |
894 | |
895 | if (!(option_mask32 & OPT_v) |
896 | && !first |
897 | && n_bytes == bytes_per_block |
898 | && memcmp(prev_block, curr_block, bytes_per_block) == 0 |
899 | ) { |
900 | if (prev_pair_equal) { |
901 | /* The two preceding blocks were equal, and the current |
902 | block is the same as the last one, so print nothing. */ |
903 | } else { |
904 | puts("*"); |
905 | prev_pair_equal = 1; |
906 | } |
907 | } else { |
908 | first = 0; |
909 | prev_pair_equal = 0; |
910 | for (i = 0; i < n_specs; i++) { |
911 | if (i == 0) |
912 | format_address(current_offset, '\0'); |
913 | else |
914 | printf("%*s", address_pad_len_char - '0', ""); |
915 | (*spec[i].print_function) (n_bytes, curr_block, spec[i].fmt_string); |
916 | if (spec[i].hexl_mode_trailer) { |
917 | /* space-pad out to full line width, then dump the trailer */ |
918 | unsigned datum_width = width_bytes[spec[i].size]; |
919 | unsigned blank_fields = (bytes_per_block - n_bytes) / datum_width; |
920 | unsigned field_width = spec[i].field_width + 1; |
921 | printf("%*s", blank_fields * field_width, ""); |
922 | dump_hexl_mode_trailer(n_bytes, curr_block); |
923 | } |
924 | putchar('\n'); |
925 | } |
926 | } |
927 | } |
928 | |
929 | static void |
930 | read_block(size_t n, char *block, size_t *n_bytes_in_buffer) |
931 | { |
932 | assert(0 < n && n <= bytes_per_block); |
933 | |
934 | *n_bytes_in_buffer = 0; |
935 | |
936 | if (n == 0) |
937 | return; |
938 | |
939 | while (in_stream != NULL) { /* EOF. */ |
940 | size_t n_needed; |
941 | size_t n_read; |
942 | |
943 | n_needed = n - *n_bytes_in_buffer; |
944 | n_read = fread(block + *n_bytes_in_buffer, 1, n_needed, in_stream); |
945 | *n_bytes_in_buffer += n_read; |
946 | if (n_read == n_needed) |
947 | break; |
948 | /* error check is done in check_and_close */ |
949 | check_and_close(); |
950 | open_next_file(); |
951 | } |
952 | } |
953 | |
954 | /* Return the least common multiple of the sizes associated |
955 | with the format specs. */ |
956 | |
957 | static int |
958 | get_lcm(void) |
959 | { |
960 | size_t i; |
961 | int l_c_m = 1; |
962 | |
963 | for (i = 0; i < n_specs; i++) |
964 | l_c_m = lcm(l_c_m, width_bytes[(int) spec[i].size]); |
965 | return l_c_m; |
966 | } |
967 | |
968 | /* Read a chunk of size BYTES_PER_BLOCK from the input files, write the |
969 | formatted block to standard output, and repeat until the specified |
970 | maximum number of bytes has been read or until all input has been |
971 | processed. If the last block read is smaller than BYTES_PER_BLOCK |
972 | and its size is not a multiple of the size associated with a format |
973 | spec, extend the input block with zero bytes until its length is a |
974 | multiple of all format spec sizes. Write the final block. Finally, |
975 | write on a line by itself the offset of the byte after the last byte |
976 | read. */ |
977 | |
978 | static void |
979 | dump(off_t current_offset, off_t end_offset) |
980 | { |
981 | char *block[2]; |
982 | int idx; |
983 | size_t n_bytes_read; |
984 | |
985 | block[0] = xmalloc(2 * bytes_per_block); |
986 | block[1] = block[0] + bytes_per_block; |
987 | |
988 | idx = 0; |
989 | if (option_mask32 & OPT_N) { |
990 | while (1) { |
991 | size_t n_needed; |
992 | if (current_offset >= end_offset) { |
993 | n_bytes_read = 0; |
994 | break; |
995 | } |
996 | n_needed = MIN(end_offset - current_offset, (off_t) bytes_per_block); |
997 | read_block(n_needed, block[idx], &n_bytes_read); |
998 | if (n_bytes_read < bytes_per_block) |
999 | break; |
1000 | assert(n_bytes_read == bytes_per_block); |
1001 | write_block(current_offset, n_bytes_read, block[idx ^ 1], block[idx]); |
1002 | current_offset += n_bytes_read; |
1003 | idx ^= 1; |
1004 | } |
1005 | } else { |
1006 | while (1) { |
1007 | read_block(bytes_per_block, block[idx], &n_bytes_read); |
1008 | if (n_bytes_read < bytes_per_block) |
1009 | break; |
1010 | assert(n_bytes_read == bytes_per_block); |
1011 | write_block(current_offset, n_bytes_read, block[idx ^ 1], block[idx]); |
1012 | current_offset += n_bytes_read; |
1013 | idx ^= 1; |
1014 | } |
1015 | } |
1016 | |
1017 | if (n_bytes_read > 0) { |
1018 | int l_c_m; |
1019 | size_t bytes_to_write; |
1020 | |
1021 | l_c_m = get_lcm(); |
1022 | |
1023 | /* Make bytes_to_write the smallest multiple of l_c_m that |
1024 | is at least as large as n_bytes_read. */ |
1025 | bytes_to_write = l_c_m * ((n_bytes_read + l_c_m - 1) / l_c_m); |
1026 | |
1027 | memset(block[idx] + n_bytes_read, 0, bytes_to_write - n_bytes_read); |
1028 | write_block(current_offset, bytes_to_write, |
1029 | block[idx ^ 1], block[idx]); |
1030 | current_offset += n_bytes_read; |
1031 | } |
1032 | |
1033 | format_address(current_offset, '\n'); |
1034 | |
1035 | if ((option_mask32 & OPT_N) && current_offset >= end_offset) |
1036 | check_and_close(); |
1037 | |
1038 | free(block[0]); |
1039 | } |
1040 | |
1041 | /* Read N bytes into BLOCK from the concatenation of the input files |
1042 | named in the global array FILE_LIST. On the first call to this |
1043 | function, the global variable IN_STREAM is expected to be an open |
1044 | stream associated with the input file INPUT_FILENAME. If all N |
1045 | bytes cannot be read from IN_STREAM, close IN_STREAM and update |
1046 | the global variables IN_STREAM and INPUT_FILENAME. Then try to |
1047 | read the remaining bytes from the newly opened file. Repeat if |
1048 | necessary until EOF is reached for the last file in FILE_LIST. |
1049 | On subsequent calls, don't modify BLOCK and return zero. Set |
1050 | *N_BYTES_IN_BUFFER to the number of bytes read. If an error occurs, |
1051 | it will be detected through ferror when the stream is about to be |
1052 | closed. If there is an error, give a message but continue reading |
1053 | as usual and return nonzero. Otherwise return zero. */ |
1054 | |
1055 | /* STRINGS mode. Find each "string constant" in the input. |
1056 | A string constant is a run of at least 'string_min' ASCII |
1057 | graphic (or formatting) characters terminated by a null. |
1058 | Based on a function written by Richard Stallman for a |
1059 | traditional version of od. */ |
1060 | |
1061 | static void |
1062 | dump_strings(off_t address, off_t end_offset) |
1063 | { |
1064 | unsigned bufsize = MAX(100, string_min); |
1065 | unsigned char *buf = xmalloc(bufsize); |
1066 | |
1067 | while (1) { |
1068 | size_t i; |
1069 | int c; |
1070 | |
1071 | /* See if the next 'string_min' chars are all printing chars. */ |
1072 | tryline: |
1073 | if ((option_mask32 & OPT_N) && (end_offset - string_min <= address)) |
1074 | break; |
1075 | i = 0; |
1076 | while (!(option_mask32 & OPT_N) || address < end_offset) { |
1077 | if (i == bufsize) { |
1078 | bufsize += bufsize/8; |
1079 | buf = xrealloc(buf, bufsize); |
1080 | } |
1081 | |
1082 | while (in_stream) { /* !EOF */ |
1083 | c = fgetc(in_stream); |
1084 | if (c != EOF) |
1085 | goto got_char; |
1086 | check_and_close(); |
1087 | open_next_file(); |
1088 | } |
1089 | /* EOF */ |
1090 | goto ret; |
1091 | got_char: |
1092 | address++; |
1093 | if (!c) |
1094 | break; |
1095 | if (!ISPRINT(c)) |
1096 | goto tryline; /* It isn't; give up on this string. */ |
1097 | buf[i++] = c; /* String continues; store it all. */ |
1098 | } |
1099 | |
1100 | if (i < string_min) /* Too short! */ |
1101 | goto tryline; |
1102 | |
1103 | /* If we get here, the string is all printable and NUL-terminated */ |
1104 | buf[i] = 0; |
1105 | format_address(address - i - 1, ' '); |
1106 | |
1107 | for (i = 0; (c = buf[i]); i++) { |
1108 | switch (c) { |
1109 | case '\007': fputs("\\a", stdout); break; |
1110 | case '\b': fputs("\\b", stdout); break; |
1111 | case '\f': fputs("\\f", stdout); break; |
1112 | case '\n': fputs("\\n", stdout); break; |
1113 | case '\r': fputs("\\r", stdout); break; |
1114 | case '\t': fputs("\\t", stdout); break; |
1115 | case '\v': fputs("\\v", stdout); break; |
1116 | default: putchar(c); |
1117 | } |
1118 | } |
1119 | putchar('\n'); |
1120 | } |
1121 | |
1122 | /* We reach this point only if we search through |
1123 | (max_bytes_to_format - string_min) bytes before reaching EOF. */ |
1124 | check_and_close(); |
1125 | ret: |
1126 | free(buf); |
1127 | } |
1128 | |
1129 | #if ENABLE_LONG_OPTS |
1130 | /* If S is a valid traditional offset specification with an optional |
1131 | leading '+' return nonzero and set *OFFSET to the offset it denotes. */ |
1132 | |
1133 | static int |
1134 | parse_old_offset(const char *s, off_t *offset) |
1135 | { |
1136 | static const struct suffix_mult Bb[] = { |
1137 | { "B", 1024 }, |
1138 | { "b", 512 }, |
1139 | { "", 0 } |
1140 | }; |
1141 | char *p; |
1142 | int radix; |
1143 | |
1144 | /* Skip over any leading '+'. */ |
1145 | if (s[0] == '+') ++s; |
1146 | if (!isdigit(s[0])) return 0; /* not a number */ |
1147 | |
1148 | /* Determine the radix we'll use to interpret S. If there is a '.', |
1149 | * it's decimal, otherwise, if the string begins with '0X'or '0x', |
1150 | * it's hexadecimal, else octal. */ |
1151 | p = strchr(s, '.'); |
1152 | radix = 8; |
1153 | if (p) { |
1154 | p[0] = '\0'; /* cheating */ |
1155 | radix = 10; |
1156 | } else if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X')) |
1157 | radix = 16; |
1158 | |
1159 | *offset = xstrtooff_sfx(s, radix, Bb); |
1160 | if (p) p[0] = '.'; |
1161 | |
1162 | return (*offset >= 0); |
1163 | } |
1164 | #endif |
1165 | |
1166 | int od_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
1167 | int od_main(int argc UNUSED_PARAM, char **argv) |
1168 | { |
1169 | #if ENABLE_LONG_OPTS |
1170 | static const char od_longopts[] ALIGN1 = |
1171 | "skip-bytes\0" Required_argument "j" |
1172 | "address-radix\0" Required_argument "A" |
1173 | "read-bytes\0" Required_argument "N" |
1174 | "format\0" Required_argument "t" |
1175 | "output-duplicates\0" No_argument "v" |
1176 | /* Yes, it's true: -S NUM, but --strings[=NUM]! |
1177 | * that is, NUM is mandatory for -S but optional for --strings! |
1178 | */ |
1179 | "strings\0" Optional_argument "S" |
1180 | "width\0" Optional_argument "w" |
1181 | "traditional\0" No_argument "\xff" |
1182 | ; |
1183 | #endif |
1184 | const char *str_A, *str_N, *str_j, *str_S = "3"; |
1185 | llist_t *lst_t = NULL; |
1186 | unsigned opt; |
1187 | int l_c_m; |
1188 | /* The number of input bytes to skip before formatting and writing. */ |
1189 | off_t n_bytes_to_skip = 0; |
1190 | /* The offset of the first byte after the last byte to be formatted. */ |
1191 | off_t end_offset = 0; |
1192 | /* The maximum number of bytes that will be formatted. */ |
1193 | off_t max_bytes_to_format = 0; |
1194 | |
1195 | spec = NULL; |
1196 | format_address = format_address_std; |
1197 | address_base_char = 'o'; |
1198 | address_pad_len_char = '7'; |
1199 | |
1200 | /* Parse command line */ |
1201 | opt_complementary = "w+:t::"; /* -w N, -t is a list */ |
1202 | #if ENABLE_LONG_OPTS |
1203 | applet_long_options = od_longopts; |
1204 | #endif |
1205 | opt = OD_GETOPT32(); |
1206 | argv += optind; |
1207 | if (opt & OPT_A) { |
1208 | static const char doxn[] ALIGN1 = "doxn"; |
1209 | static const char doxn_address_base_char[] ALIGN1 = { |
1210 | 'u', 'o', 'x', /* '?' fourth one is not important */ |
1211 | }; |
1212 | static const uint8_t doxn_address_pad_len_char[] ALIGN1 = { |
1213 | '7', '7', '6', /* '?' */ |
1214 | }; |
1215 | char *p; |
1216 | int pos; |
1217 | p = strchr(doxn, str_A[0]); |
1218 | if (!p) |
1219 | bb_error_msg_and_die("bad output address radix " |
1220 | "'%c' (must be [doxn])", str_A[0]); |
1221 | pos = p - doxn; |
1222 | if (pos == 3) format_address = format_address_none; |
1223 | address_base_char = doxn_address_base_char[pos]; |
1224 | address_pad_len_char = doxn_address_pad_len_char[pos]; |
1225 | } |
1226 | if (opt & OPT_N) { |
1227 | max_bytes_to_format = xstrtooff_sfx(str_N, 0, bkm_suffixes); |
1228 | } |
1229 | if (opt & OPT_a) decode_format_string("a"); |
1230 | if (opt & OPT_b) decode_format_string("oC"); |
1231 | if (opt & OPT_c) decode_format_string("c"); |
1232 | if (opt & OPT_d) decode_format_string("u2"); |
1233 | if (opt & OPT_f) decode_format_string("fF"); |
1234 | if (opt & OPT_h) decode_format_string("x2"); |
1235 | if (opt & OPT_i) decode_format_string("d2"); |
1236 | if (opt & OPT_j) n_bytes_to_skip = xstrtooff_sfx(str_j, 0, bkm_suffixes); |
1237 | if (opt & OPT_l) decode_format_string("d4"); |
1238 | if (opt & OPT_o) decode_format_string("o2"); |
1239 | while (lst_t) { |
1240 | decode_format_string(llist_pop(&lst_t)); |
1241 | } |
1242 | if (opt & OPT_x) decode_format_string("x2"); |
1243 | if (opt & OPT_s) decode_format_string("d2"); |
1244 | if (opt & OPT_S) { |
1245 | string_min = xstrtou_sfx(str_S, 0, bkm_suffixes); |
1246 | } |
1247 | |
1248 | // Bloat: |
1249 | //if ((option_mask32 & OPT_S) && n_specs > 0) |
1250 | // bb_error_msg_and_die("no type may be specified when dumping strings"); |
1251 | |
1252 | /* If the --traditional option is used, there may be from |
1253 | * 0 to 3 remaining command line arguments; handle each case |
1254 | * separately. |
1255 | * od [FILE] [[+]OFFSET[.][b] [[+]LABEL[.][b]]] |
1256 | * The offset and pseudo_start have the same syntax. |
1257 | * |
1258 | * FIXME: POSIX 1003.1-2001 with XSI requires support for the |
1259 | * traditional syntax even if --traditional is not given. */ |
1260 | |
1261 | #if ENABLE_LONG_OPTS |
1262 | if (opt & OPT_traditional) { |
1263 | if (argv[0]) { |
1264 | off_t pseudo_start = -1; |
1265 | off_t o1, o2; |
1266 | |
1267 | if (!argv[1]) { /* one arg */ |
1268 | if (parse_old_offset(argv[0], &o1)) { |
1269 | /* od --traditional OFFSET */ |
1270 | n_bytes_to_skip = o1; |
1271 | argv++; |
1272 | } |
1273 | /* od --traditional FILE */ |
1274 | } else if (!argv[2]) { /* two args */ |
1275 | if (parse_old_offset(argv[0], &o1) |
1276 | && parse_old_offset(argv[1], &o2) |
1277 | ) { |
1278 | /* od --traditional OFFSET LABEL */ |
1279 | n_bytes_to_skip = o1; |
1280 | pseudo_start = o2; |
1281 | argv += 2; |
1282 | } else if (parse_old_offset(argv[1], &o2)) { |
1283 | /* od --traditional FILE OFFSET */ |
1284 | n_bytes_to_skip = o2; |
1285 | argv[1] = NULL; |
1286 | } else { |
1287 | bb_error_msg_and_die("invalid second argument '%s'", argv[1]); |
1288 | } |
1289 | } else if (!argv[3]) { /* three args */ |
1290 | if (parse_old_offset(argv[1], &o1) |
1291 | && parse_old_offset(argv[2], &o2) |
1292 | ) { |
1293 | /* od --traditional FILE OFFSET LABEL */ |
1294 | n_bytes_to_skip = o1; |
1295 | pseudo_start = o2; |
1296 | argv[1] = NULL; |
1297 | } else { |
1298 | bb_error_msg_and_die("the last two arguments must be offsets"); |
1299 | } |
1300 | } else { /* >3 args */ |
1301 | bb_error_msg_and_die("too many arguments"); |
1302 | } |
1303 | |
1304 | if (pseudo_start >= 0) { |
1305 | if (format_address == format_address_none) { |
1306 | address_base_char = 'o'; |
1307 | address_pad_len_char = '7'; |
1308 | format_address = format_address_paren; |
1309 | } else { |
1310 | format_address = format_address_label; |
1311 | } |
1312 | pseudo_offset = pseudo_start - n_bytes_to_skip; |
1313 | } |
1314 | } |
1315 | /* else: od --traditional (without args) */ |
1316 | } |
1317 | #endif |
1318 | |
1319 | if (option_mask32 & OPT_N) { |
1320 | end_offset = n_bytes_to_skip + max_bytes_to_format; |
1321 | if (end_offset < n_bytes_to_skip) |
1322 | bb_error_msg_and_die("SKIP + SIZE is too large"); |
1323 | } |
1324 | |
1325 | if (n_specs == 0) { |
1326 | decode_format_string("o2"); |
1327 | /*n_specs = 1; - done by decode_format_string */ |
1328 | } |
1329 | |
1330 | /* If no files were listed on the command line, |
1331 | set the global pointer FILE_LIST so that it |
1332 | references the null-terminated list of one name: "-". */ |
1333 | file_list = bb_argv_dash; |
1334 | if (argv[0]) { |
1335 | /* Set the global pointer FILE_LIST so that it |
1336 | references the first file-argument on the command-line. */ |
1337 | file_list = (char const *const *) argv; |
1338 | } |
1339 | |
1340 | /* Open the first input file */ |
1341 | open_next_file(); |
1342 | /* Skip over any unwanted header bytes */ |
1343 | skip(n_bytes_to_skip); |
1344 | if (!in_stream) |
1345 | return EXIT_FAILURE; |
1346 | |
1347 | /* Compute output block length */ |
1348 | l_c_m = get_lcm(); |
1349 | |
1350 | if (opt & OPT_w) { /* -w: width */ |
1351 | if (!bytes_per_block || bytes_per_block % l_c_m != 0) { |
1352 | bb_error_msg("warning: invalid width %u; using %d instead", |
1353 | (unsigned)bytes_per_block, l_c_m); |
1354 | bytes_per_block = l_c_m; |
1355 | } |
1356 | } else { |
1357 | bytes_per_block = l_c_m; |
1358 | if (l_c_m < DEFAULT_BYTES_PER_BLOCK) |
1359 | bytes_per_block *= DEFAULT_BYTES_PER_BLOCK / l_c_m; |
1360 | } |
1361 | |
1362 | #ifdef DEBUG |
1363 | for (i = 0; i < n_specs; i++) { |
1364 | printf("%d: fmt=\"%s\" width=%d\n", |
1365 | i, spec[i].fmt_string, width_bytes[spec[i].size]); |
1366 | } |
1367 | #endif |
1368 | |
1369 | if (option_mask32 & OPT_S) |
1370 | dump_strings(n_bytes_to_skip, end_offset); |
1371 | else |
1372 | dump(n_bytes_to_skip, end_offset); |
1373 | |
1374 | if (fclose(stdin)) |
1375 | bb_perror_msg_and_die("%s", bb_msg_standard_input); |
1376 | |
1377 | return exit_code; |
1378 | } |
1379 |