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 | #include "common_bufsiz.h"
|
---|
24 | #define assert(a) ((void)0)
|
---|
25 |
|
---|
26 |
|
---|
27 | //usage:#if ENABLE_DESKTOP
|
---|
28 | //usage:#define od_trivial_usage
|
---|
29 | //usage: "[-abcdfhilovxs] [-t TYPE] [-A RADIX] [-N SIZE] [-j SKIP] [-S MINSTR] [-w WIDTH] [FILE]..."
|
---|
30 | // We don't support:
|
---|
31 | // ... [FILE] [[+]OFFSET[.][b]]
|
---|
32 | // Support is buggy for:
|
---|
33 | // od --traditional [OPTION]... [FILE] [[+]OFFSET[.][b] [+][LABEL][.][b]]
|
---|
34 |
|
---|
35 | //usage:#define od_full_usage "\n\n"
|
---|
36 | //usage: "Print FILEs (or stdin) unambiguously, as octal bytes by default"
|
---|
37 | //usage:#endif
|
---|
38 |
|
---|
39 | enum {
|
---|
40 | OPT_A = 1 << 0,
|
---|
41 | OPT_N = 1 << 1,
|
---|
42 | OPT_a = 1 << 2,
|
---|
43 | OPT_b = 1 << 3,
|
---|
44 | OPT_c = 1 << 4,
|
---|
45 | OPT_d = 1 << 5,
|
---|
46 | OPT_f = 1 << 6,
|
---|
47 | OPT_h = 1 << 7,
|
---|
48 | OPT_i = 1 << 8,
|
---|
49 | OPT_j = 1 << 9,
|
---|
50 | OPT_l = 1 << 10,
|
---|
51 | OPT_o = 1 << 11,
|
---|
52 | OPT_t = 1 << 12,
|
---|
53 | /* When zero and two or more consecutive blocks are equal, format
|
---|
54 | only the first block and output an asterisk alone on the following
|
---|
55 | line to indicate that identical blocks have been elided: */
|
---|
56 | OPT_v = 1 << 13,
|
---|
57 | OPT_x = 1 << 14,
|
---|
58 | OPT_s = 1 << 15,
|
---|
59 | OPT_S = 1 << 16,
|
---|
60 | OPT_w = 1 << 17,
|
---|
61 | OPT_traditional = (1 << 18) * ENABLE_LONG_OPTS,
|
---|
62 | };
|
---|
63 |
|
---|
64 | #define OD_GETOPT32() getopt32(argv, \
|
---|
65 | "A:N:abcdfhij:lot:vxsS:w::", \
|
---|
66 | /* -w with optional param */ \
|
---|
67 | /* -S was -s and also had optional parameter */ \
|
---|
68 | /* but in coreutils 6.3 it was renamed and now has */ \
|
---|
69 | /* _mandatory_ parameter */ \
|
---|
70 | &str_A, &str_N, &str_j, &lst_t, &str_S, &G.bytes_per_block)
|
---|
71 |
|
---|
72 |
|
---|
73 | /* Check for 0x7f is a coreutils 6.3 addition */
|
---|
74 | #define ISPRINT(c) (((c) >= ' ') && (c) < 0x7f)
|
---|
75 |
|
---|
76 | typedef long double longdouble_t;
|
---|
77 | typedef unsigned long long ulonglong_t;
|
---|
78 | typedef long long llong;
|
---|
79 |
|
---|
80 | #if ENABLE_LFS
|
---|
81 | # define xstrtooff_sfx xstrtoull_sfx
|
---|
82 | #else
|
---|
83 | # define xstrtooff_sfx xstrtoul_sfx
|
---|
84 | #endif
|
---|
85 |
|
---|
86 | /* The default number of input bytes per output line. */
|
---|
87 | #define DEFAULT_BYTES_PER_BLOCK 16
|
---|
88 |
|
---|
89 | /* The number of decimal digits of precision in a float. */
|
---|
90 | #ifndef FLT_DIG
|
---|
91 | # define FLT_DIG 7
|
---|
92 | #endif
|
---|
93 |
|
---|
94 | /* The number of decimal digits of precision in a double. */
|
---|
95 | #ifndef DBL_DIG
|
---|
96 | # define DBL_DIG 15
|
---|
97 | #endif
|
---|
98 |
|
---|
99 | /* The number of decimal digits of precision in a long double. */
|
---|
100 | #ifndef LDBL_DIG
|
---|
101 | # define LDBL_DIG DBL_DIG
|
---|
102 | #endif
|
---|
103 |
|
---|
104 | enum size_spec {
|
---|
105 | NO_SIZE,
|
---|
106 | CHAR,
|
---|
107 | SHORT,
|
---|
108 | INT,
|
---|
109 | LONG,
|
---|
110 | LONG_LONG,
|
---|
111 | FLOAT_SINGLE,
|
---|
112 | FLOAT_DOUBLE,
|
---|
113 | FLOAT_LONG_DOUBLE,
|
---|
114 | N_SIZE_SPECS
|
---|
115 | };
|
---|
116 |
|
---|
117 | enum output_format {
|
---|
118 | SIGNED_DECIMAL,
|
---|
119 | UNSIGNED_DECIMAL,
|
---|
120 | OCTAL,
|
---|
121 | HEXADECIMAL,
|
---|
122 | FLOATING_POINT,
|
---|
123 | NAMED_CHARACTER,
|
---|
124 | CHARACTER
|
---|
125 | };
|
---|
126 |
|
---|
127 | /* Each output format specification (from '-t spec' or from
|
---|
128 | old-style options) is represented by one of these structures. */
|
---|
129 | struct tspec {
|
---|
130 | enum output_format fmt;
|
---|
131 | enum size_spec size;
|
---|
132 | void (*print_function) (size_t, const char *, const char *);
|
---|
133 | char *fmt_string;
|
---|
134 | int hexl_mode_trailer;
|
---|
135 | int field_width;
|
---|
136 | };
|
---|
137 |
|
---|
138 | /* Convert the number of 8-bit bytes of a binary representation to
|
---|
139 | the number of characters (digits + sign if the type is signed)
|
---|
140 | required to represent the same quantity in the specified base/type.
|
---|
141 | For example, a 32-bit (4-byte) quantity may require a field width
|
---|
142 | as wide as the following for these types:
|
---|
143 | 11 unsigned octal
|
---|
144 | 11 signed decimal
|
---|
145 | 10 unsigned decimal
|
---|
146 | 8 unsigned hexadecimal */
|
---|
147 |
|
---|
148 | static const uint8_t bytes_to_oct_digits[] ALIGN1 =
|
---|
149 | {0, 3, 6, 8, 11, 14, 16, 19, 22, 25, 27, 30, 32, 35, 38, 41, 43};
|
---|
150 |
|
---|
151 | static const uint8_t bytes_to_signed_dec_digits[] ALIGN1 =
|
---|
152 | {1, 4, 6, 8, 11, 13, 16, 18, 20, 23, 25, 28, 30, 33, 35, 37, 40};
|
---|
153 |
|
---|
154 | static const uint8_t bytes_to_unsigned_dec_digits[] ALIGN1 =
|
---|
155 | {0, 3, 5, 8, 10, 13, 15, 17, 20, 22, 25, 27, 29, 32, 34, 37, 39};
|
---|
156 |
|
---|
157 | static const uint8_t bytes_to_hex_digits[] ALIGN1 =
|
---|
158 | {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32};
|
---|
159 |
|
---|
160 | /* Convert enum size_spec to the size of the named type. */
|
---|
161 | static const signed char width_bytes[] ALIGN1 = {
|
---|
162 | -1,
|
---|
163 | sizeof(char),
|
---|
164 | sizeof(short),
|
---|
165 | sizeof(int),
|
---|
166 | sizeof(long),
|
---|
167 | sizeof(ulonglong_t),
|
---|
168 | sizeof(float),
|
---|
169 | sizeof(double),
|
---|
170 | sizeof(longdouble_t)
|
---|
171 | };
|
---|
172 | /* Ensure that for each member of 'enum size_spec' there is an
|
---|
173 | initializer in the width_bytes array. */
|
---|
174 | struct ERR_width_bytes_has_bad_size {
|
---|
175 | char ERR_width_bytes_has_bad_size[ARRAY_SIZE(width_bytes) == N_SIZE_SPECS ? 1 : -1];
|
---|
176 | };
|
---|
177 |
|
---|
178 | struct globals {
|
---|
179 | smallint exit_code;
|
---|
180 |
|
---|
181 | unsigned string_min;
|
---|
182 |
|
---|
183 | /* An array of specs describing how to format each input block. */
|
---|
184 | unsigned n_specs;
|
---|
185 | struct tspec *spec;
|
---|
186 |
|
---|
187 | /* Function that accepts an address and an optional following char,
|
---|
188 | and prints the address and char to stdout. */
|
---|
189 | void (*format_address)(off_t, char);
|
---|
190 |
|
---|
191 | /* The difference between the old-style pseudo starting address and
|
---|
192 | the number of bytes to skip. */
|
---|
193 | #if ENABLE_LONG_OPTS
|
---|
194 | off_t pseudo_offset;
|
---|
195 | # define G_pseudo_offset G.pseudo_offset
|
---|
196 | #endif
|
---|
197 | /* When zero, MAX_BYTES_TO_FORMAT and END_OFFSET are ignored, and all
|
---|
198 | input is formatted. */
|
---|
199 |
|
---|
200 | /* The number of input bytes formatted per output line. It must be
|
---|
201 | a multiple of the least common multiple of the sizes associated with
|
---|
202 | the specified output types. It should be as large as possible, but
|
---|
203 | no larger than 16 -- unless specified with the -w option. */
|
---|
204 | unsigned bytes_per_block; /* have to use unsigned, not size_t */
|
---|
205 |
|
---|
206 | /* A NULL-terminated list of the file-arguments from the command line. */
|
---|
207 | const char *const *file_list;
|
---|
208 |
|
---|
209 | /* The input stream associated with the current file. */
|
---|
210 | FILE *in_stream;
|
---|
211 |
|
---|
212 | bool not_first;
|
---|
213 | bool prev_pair_equal;
|
---|
214 | } FIX_ALIASING;
|
---|
215 | #if !ENABLE_LONG_OPTS
|
---|
216 | enum { G_pseudo_offset = 0 };
|
---|
217 | #endif
|
---|
218 | #define G (*(struct globals*)bb_common_bufsiz1)
|
---|
219 | #define INIT_G() do { \
|
---|
220 | setup_common_bufsiz(); \
|
---|
221 | BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
|
---|
222 | G.bytes_per_block = 32; \
|
---|
223 | } while (0)
|
---|
224 |
|
---|
225 |
|
---|
226 | #define MAX_INTEGRAL_TYPE_SIZE sizeof(ulonglong_t)
|
---|
227 | static const unsigned char integral_type_size[MAX_INTEGRAL_TYPE_SIZE + 1] ALIGN1 = {
|
---|
228 | [sizeof(char)] = CHAR,
|
---|
229 | #if USHRT_MAX != UCHAR_MAX
|
---|
230 | [sizeof(short)] = SHORT,
|
---|
231 | #endif
|
---|
232 | #if UINT_MAX != USHRT_MAX
|
---|
233 | [sizeof(int)] = INT,
|
---|
234 | #endif
|
---|
235 | #if ULONG_MAX != UINT_MAX
|
---|
236 | [sizeof(long)] = LONG,
|
---|
237 | #endif
|
---|
238 | #if ULLONG_MAX != ULONG_MAX
|
---|
239 | [sizeof(ulonglong_t)] = LONG_LONG,
|
---|
240 | #endif
|
---|
241 | };
|
---|
242 |
|
---|
243 | #define MAX_FP_TYPE_SIZE sizeof(longdouble_t)
|
---|
244 | static const unsigned char fp_type_size[MAX_FP_TYPE_SIZE + 1] ALIGN1 = {
|
---|
245 | /* gcc seems to allow repeated indexes. Last one wins */
|
---|
246 | [sizeof(longdouble_t)] = FLOAT_LONG_DOUBLE,
|
---|
247 | [sizeof(double)] = FLOAT_DOUBLE,
|
---|
248 | [sizeof(float)] = FLOAT_SINGLE
|
---|
249 | };
|
---|
250 |
|
---|
251 |
|
---|
252 | static unsigned
|
---|
253 | gcd(unsigned u, unsigned v)
|
---|
254 | {
|
---|
255 | unsigned t;
|
---|
256 | while (v != 0) {
|
---|
257 | t = u % v;
|
---|
258 | u = v;
|
---|
259 | v = t;
|
---|
260 | }
|
---|
261 | return u;
|
---|
262 | }
|
---|
263 |
|
---|
264 | /* Compute the least common multiple of U and V. */
|
---|
265 | static unsigned
|
---|
266 | lcm(unsigned u, unsigned v) {
|
---|
267 | unsigned t = gcd(u, v);
|
---|
268 | if (t == 0)
|
---|
269 | return 0;
|
---|
270 | return u * v / t;
|
---|
271 | }
|
---|
272 |
|
---|
273 | static void
|
---|
274 | print_s_char(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
275 | {
|
---|
276 | while (n_bytes--) {
|
---|
277 | int tmp = *(signed char *) block;
|
---|
278 | printf(fmt_string, tmp);
|
---|
279 | block += sizeof(unsigned char);
|
---|
280 | }
|
---|
281 | }
|
---|
282 |
|
---|
283 | static void
|
---|
284 | print_char(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
285 | {
|
---|
286 | while (n_bytes--) {
|
---|
287 | unsigned tmp = *(unsigned char *) block;
|
---|
288 | printf(fmt_string, tmp);
|
---|
289 | block += sizeof(unsigned char);
|
---|
290 | }
|
---|
291 | }
|
---|
292 |
|
---|
293 | static void
|
---|
294 | print_s_short(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
295 | {
|
---|
296 | n_bytes /= sizeof(signed short);
|
---|
297 | while (n_bytes--) {
|
---|
298 | int tmp = *(signed short *) block;
|
---|
299 | printf(fmt_string, tmp);
|
---|
300 | block += sizeof(unsigned short);
|
---|
301 | }
|
---|
302 | }
|
---|
303 |
|
---|
304 | static void
|
---|
305 | print_short(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
306 | {
|
---|
307 | n_bytes /= sizeof(unsigned short);
|
---|
308 | while (n_bytes--) {
|
---|
309 | unsigned tmp = *(unsigned short *) block;
|
---|
310 | printf(fmt_string, tmp);
|
---|
311 | block += sizeof(unsigned short);
|
---|
312 | }
|
---|
313 | }
|
---|
314 |
|
---|
315 | static void
|
---|
316 | print_int(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
317 | {
|
---|
318 | n_bytes /= sizeof(unsigned);
|
---|
319 | while (n_bytes--) {
|
---|
320 | unsigned tmp = *(unsigned *) block;
|
---|
321 | printf(fmt_string, tmp);
|
---|
322 | block += sizeof(unsigned);
|
---|
323 | }
|
---|
324 | }
|
---|
325 |
|
---|
326 | #if UINT_MAX == ULONG_MAX
|
---|
327 | # define print_long print_int
|
---|
328 | #else
|
---|
329 | static void
|
---|
330 | print_long(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
331 | {
|
---|
332 | n_bytes /= sizeof(unsigned long);
|
---|
333 | while (n_bytes--) {
|
---|
334 | unsigned long tmp = *(unsigned long *) block;
|
---|
335 | printf(fmt_string, tmp);
|
---|
336 | block += sizeof(unsigned long);
|
---|
337 | }
|
---|
338 | }
|
---|
339 | #endif
|
---|
340 |
|
---|
341 | #if ULONG_MAX == ULLONG_MAX
|
---|
342 | # define print_long_long print_long
|
---|
343 | #else
|
---|
344 | static void
|
---|
345 | print_long_long(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
346 | {
|
---|
347 | n_bytes /= sizeof(ulonglong_t);
|
---|
348 | while (n_bytes--) {
|
---|
349 | ulonglong_t tmp = *(ulonglong_t *) block;
|
---|
350 | printf(fmt_string, tmp);
|
---|
351 | block += sizeof(ulonglong_t);
|
---|
352 | }
|
---|
353 | }
|
---|
354 | #endif
|
---|
355 |
|
---|
356 | static void
|
---|
357 | print_float(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
358 | {
|
---|
359 | n_bytes /= sizeof(float);
|
---|
360 | while (n_bytes--) {
|
---|
361 | float tmp = *(float *) block;
|
---|
362 | printf(fmt_string, tmp);
|
---|
363 | block += sizeof(float);
|
---|
364 | }
|
---|
365 | }
|
---|
366 |
|
---|
367 | static void
|
---|
368 | print_double(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
369 | {
|
---|
370 | n_bytes /= sizeof(double);
|
---|
371 | while (n_bytes--) {
|
---|
372 | double tmp = *(double *) block;
|
---|
373 | printf(fmt_string, tmp);
|
---|
374 | block += sizeof(double);
|
---|
375 | }
|
---|
376 | }
|
---|
377 |
|
---|
378 | static void
|
---|
379 | print_long_double(size_t n_bytes, const char *block, const char *fmt_string)
|
---|
380 | {
|
---|
381 | n_bytes /= sizeof(longdouble_t);
|
---|
382 | while (n_bytes--) {
|
---|
383 | longdouble_t tmp = *(longdouble_t *) block;
|
---|
384 | printf(fmt_string, tmp);
|
---|
385 | block += sizeof(longdouble_t);
|
---|
386 | }
|
---|
387 | }
|
---|
388 |
|
---|
389 | /* print_[named]_ascii are optimized for speed.
|
---|
390 | * Remember, someday you may want to pump gigabytes through this thing.
|
---|
391 | * Saving a dozen of .text bytes here is counter-productive */
|
---|
392 |
|
---|
393 | static void
|
---|
394 | print_named_ascii(size_t n_bytes, const char *block,
|
---|
395 | const char *unused_fmt_string UNUSED_PARAM)
|
---|
396 | {
|
---|
397 | /* Names for some non-printing characters. */
|
---|
398 | static const char charname[33][3] ALIGN1 = {
|
---|
399 | "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
|
---|
400 | " bs", " ht", " nl", " vt", " ff", " cr", " so", " si",
|
---|
401 | "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb",
|
---|
402 | "can", " em", "sub", "esc", " fs", " gs", " rs", " us",
|
---|
403 | " sp"
|
---|
404 | };
|
---|
405 | // buf[N] pos: 01234 56789
|
---|
406 | char buf[12] = " x\0 xxx\0";
|
---|
407 | // [12] because we take three 32bit stack slots anyway, and
|
---|
408 | // gcc is too dumb to initialize with constant stores,
|
---|
409 | // it copies initializer from rodata. Oh well.
|
---|
410 | // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65410
|
---|
411 |
|
---|
412 | while (n_bytes--) {
|
---|
413 | unsigned masked_c = *(unsigned char *) block++;
|
---|
414 |
|
---|
415 | masked_c &= 0x7f;
|
---|
416 | if (masked_c == 0x7f) {
|
---|
417 | fputs(" del", stdout);
|
---|
418 | continue;
|
---|
419 | }
|
---|
420 | if (masked_c > ' ') {
|
---|
421 | buf[3] = masked_c;
|
---|
422 | fputs(buf, stdout);
|
---|
423 | continue;
|
---|
424 | }
|
---|
425 | /* Why? Because printf(" %3.3s") is much slower... */
|
---|
426 | buf[6] = charname[masked_c][0];
|
---|
427 | buf[7] = charname[masked_c][1];
|
---|
428 | buf[8] = charname[masked_c][2];
|
---|
429 | fputs(buf+5, stdout);
|
---|
430 | }
|
---|
431 | }
|
---|
432 |
|
---|
433 | static void
|
---|
434 | print_ascii(size_t n_bytes, const char *block,
|
---|
435 | const char *unused_fmt_string UNUSED_PARAM)
|
---|
436 | {
|
---|
437 | // buf[N] pos: 01234 56789
|
---|
438 | char buf[12] = " x\0 xxx\0";
|
---|
439 |
|
---|
440 | while (n_bytes--) {
|
---|
441 | const char *s;
|
---|
442 | unsigned c = *(unsigned char *) block++;
|
---|
443 |
|
---|
444 | if (ISPRINT(c)) {
|
---|
445 | buf[3] = c;
|
---|
446 | fputs(buf, stdout);
|
---|
447 | continue;
|
---|
448 | }
|
---|
449 | switch (c) {
|
---|
450 | case '\0':
|
---|
451 | s = " \\0";
|
---|
452 | break;
|
---|
453 | case '\007':
|
---|
454 | s = " \\a";
|
---|
455 | break;
|
---|
456 | case '\b':
|
---|
457 | s = " \\b";
|
---|
458 | break;
|
---|
459 | case '\f':
|
---|
460 | s = " \\f";
|
---|
461 | break;
|
---|
462 | case '\n':
|
---|
463 | s = " \\n";
|
---|
464 | break;
|
---|
465 | case '\r':
|
---|
466 | s = " \\r";
|
---|
467 | break;
|
---|
468 | case '\t':
|
---|
469 | s = " \\t";
|
---|
470 | break;
|
---|
471 | case '\v':
|
---|
472 | s = " \\v";
|
---|
473 | break;
|
---|
474 | default:
|
---|
475 | buf[6] = (c >> 6 & 3) + '0';
|
---|
476 | buf[7] = (c >> 3 & 7) + '0';
|
---|
477 | buf[8] = (c & 7) + '0';
|
---|
478 | s = buf + 5;
|
---|
479 | }
|
---|
480 | fputs(s, stdout);
|
---|
481 | }
|
---|
482 | }
|
---|
483 |
|
---|
484 | /* Given a list of one or more input filenames FILE_LIST, set the global
|
---|
485 | file pointer IN_STREAM and the global string INPUT_FILENAME to the
|
---|
486 | first one that can be successfully opened. Modify FILE_LIST to
|
---|
487 | reference the next filename in the list. A file name of "-" is
|
---|
488 | interpreted as standard input. If any file open fails, give an error
|
---|
489 | message and return nonzero. */
|
---|
490 |
|
---|
491 | static void
|
---|
492 | open_next_file(void)
|
---|
493 | {
|
---|
494 | while (1) {
|
---|
495 | if (!*G.file_list)
|
---|
496 | return;
|
---|
497 | G.in_stream = fopen_or_warn_stdin(*G.file_list++);
|
---|
498 | if (G.in_stream) {
|
---|
499 | break;
|
---|
500 | }
|
---|
501 | G.exit_code = 1;
|
---|
502 | }
|
---|
503 |
|
---|
504 | if ((option_mask32 & (OPT_N|OPT_S)) == OPT_N)
|
---|
505 | setbuf(G.in_stream, NULL);
|
---|
506 | }
|
---|
507 |
|
---|
508 | /* Test whether there have been errors on in_stream, and close it if
|
---|
509 | it is not standard input. Return nonzero if there has been an error
|
---|
510 | on in_stream or stdout; return zero otherwise. This function will
|
---|
511 | report more than one error only if both a read and a write error
|
---|
512 | have occurred. IN_ERRNO, if nonzero, is the error number
|
---|
513 | corresponding to the most recent action for IN_STREAM. */
|
---|
514 |
|
---|
515 | static void
|
---|
516 | check_and_close(void)
|
---|
517 | {
|
---|
518 | if (G.in_stream) {
|
---|
519 | if (ferror(G.in_stream)) {
|
---|
520 | bb_error_msg("%s: read error", (G.in_stream == stdin)
|
---|
521 | ? bb_msg_standard_input
|
---|
522 | : G.file_list[-1]
|
---|
523 | );
|
---|
524 | G.exit_code = 1;
|
---|
525 | }
|
---|
526 | fclose_if_not_stdin(G.in_stream);
|
---|
527 | G.in_stream = NULL;
|
---|
528 | }
|
---|
529 |
|
---|
530 | if (ferror(stdout)) {
|
---|
531 | bb_error_msg_and_die(bb_msg_write_error);
|
---|
532 | }
|
---|
533 | }
|
---|
534 |
|
---|
535 | /* If S points to a single valid modern od format string, put
|
---|
536 | a description of that format in *TSPEC, return pointer to
|
---|
537 | character following the just-decoded format.
|
---|
538 | For example, if S were "d4afL", we will return a rtp to "afL"
|
---|
539 | and *TSPEC would be
|
---|
540 | {
|
---|
541 | fmt = SIGNED_DECIMAL;
|
---|
542 | size = INT or LONG; (whichever integral_type_size[4] resolves to)
|
---|
543 | print_function = print_int; (assuming size == INT)
|
---|
544 | fmt_string = "%011d%c";
|
---|
545 | }
|
---|
546 | S_ORIG is solely for reporting errors. It should be the full format
|
---|
547 | string argument. */
|
---|
548 |
|
---|
549 | static NOINLINE const char *
|
---|
550 | decode_one_format(const char *s_orig, const char *s, struct tspec *tspec)
|
---|
551 | {
|
---|
552 | enum size_spec size_spec;
|
---|
553 | unsigned size;
|
---|
554 | enum output_format fmt;
|
---|
555 | const char *p;
|
---|
556 | char *end;
|
---|
557 | char *fmt_string = NULL;
|
---|
558 | void (*print_function) (size_t, const char *, const char *);
|
---|
559 | unsigned c;
|
---|
560 | unsigned field_width = 0;
|
---|
561 | int pos;
|
---|
562 |
|
---|
563 | switch (*s) {
|
---|
564 | case 'd':
|
---|
565 | case 'o':
|
---|
566 | case 'u':
|
---|
567 | case 'x': {
|
---|
568 | static const char CSIL[] ALIGN1 = "CSIL";
|
---|
569 |
|
---|
570 | c = *s++;
|
---|
571 | p = strchr(CSIL, *s);
|
---|
572 | /* if *s == NUL, p != NULL! Testcase: "od -tx" */
|
---|
573 | if (!p || *p == '\0') {
|
---|
574 | size = sizeof(int);
|
---|
575 | if (isdigit(s[0])) {
|
---|
576 | size = bb_strtou(s, &end, 0);
|
---|
577 | if (errno == ERANGE
|
---|
578 | || MAX_INTEGRAL_TYPE_SIZE < size
|
---|
579 | || integral_type_size[size] == NO_SIZE
|
---|
580 | ) {
|
---|
581 | bb_error_msg_and_die("invalid type string '%s'; "
|
---|
582 | "%u-byte %s type is not supported",
|
---|
583 | s_orig, size, "integral");
|
---|
584 | }
|
---|
585 | s = end;
|
---|
586 | }
|
---|
587 | } else {
|
---|
588 | static const uint8_t CSIL_sizeof[4] = {
|
---|
589 | sizeof(char),
|
---|
590 | sizeof(short),
|
---|
591 | sizeof(int),
|
---|
592 | sizeof(long),
|
---|
593 | };
|
---|
594 | size = CSIL_sizeof[p - CSIL];
|
---|
595 | s++; /* skip C/S/I/L */
|
---|
596 | }
|
---|
597 |
|
---|
598 | #define ISPEC_TO_FORMAT(Spec, Min_format, Long_format, Max_format) \
|
---|
599 | ((Spec) == LONG_LONG ? (Max_format) \
|
---|
600 | : ((Spec) == LONG ? (Long_format) : (Min_format)))
|
---|
601 |
|
---|
602 | #define FMT_BYTES_ALLOCATED 9
|
---|
603 | size_spec = integral_type_size[size];
|
---|
604 |
|
---|
605 | {
|
---|
606 | static const char doux[] ALIGN1 = "doux";
|
---|
607 | static const char doux_fmt_letter[][4] = {
|
---|
608 | "lld", "llo", "llu", "llx"
|
---|
609 | };
|
---|
610 | static const enum output_format doux_fmt[] = {
|
---|
611 | SIGNED_DECIMAL,
|
---|
612 | OCTAL,
|
---|
613 | UNSIGNED_DECIMAL,
|
---|
614 | HEXADECIMAL,
|
---|
615 | };
|
---|
616 | static const uint8_t *const doux_bytes_to_XXX[] = {
|
---|
617 | bytes_to_signed_dec_digits,
|
---|
618 | bytes_to_oct_digits,
|
---|
619 | bytes_to_unsigned_dec_digits,
|
---|
620 | bytes_to_hex_digits,
|
---|
621 | };
|
---|
622 | static const char doux_fmtstring[][sizeof(" %%0%u%s")] = {
|
---|
623 | " %%%u%s",
|
---|
624 | " %%0%u%s",
|
---|
625 | " %%%u%s",
|
---|
626 | " %%0%u%s",
|
---|
627 | };
|
---|
628 |
|
---|
629 | pos = strchr(doux, c) - doux;
|
---|
630 | fmt = doux_fmt[pos];
|
---|
631 | field_width = doux_bytes_to_XXX[pos][size];
|
---|
632 | p = doux_fmt_letter[pos] + 2;
|
---|
633 | if (size_spec == LONG) p--;
|
---|
634 | if (size_spec == LONG_LONG) p -= 2;
|
---|
635 | fmt_string = xasprintf(doux_fmtstring[pos], field_width, p);
|
---|
636 | }
|
---|
637 |
|
---|
638 | switch (size_spec) {
|
---|
639 | case CHAR:
|
---|
640 | print_function = (fmt == SIGNED_DECIMAL
|
---|
641 | ? print_s_char
|
---|
642 | : print_char);
|
---|
643 | break;
|
---|
644 | case SHORT:
|
---|
645 | print_function = (fmt == SIGNED_DECIMAL
|
---|
646 | ? print_s_short
|
---|
647 | : print_short);
|
---|
648 | break;
|
---|
649 | case INT:
|
---|
650 | print_function = print_int;
|
---|
651 | break;
|
---|
652 | case LONG:
|
---|
653 | print_function = print_long;
|
---|
654 | break;
|
---|
655 | default: /* case LONG_LONG: */
|
---|
656 | print_function = print_long_long;
|
---|
657 | break;
|
---|
658 | }
|
---|
659 | break;
|
---|
660 | }
|
---|
661 |
|
---|
662 | case 'f': {
|
---|
663 | static const char FDL[] ALIGN1 = "FDL";
|
---|
664 |
|
---|
665 | fmt = FLOATING_POINT;
|
---|
666 | ++s;
|
---|
667 | p = strchr(FDL, *s);
|
---|
668 | if (!p) {
|
---|
669 | size = sizeof(double);
|
---|
670 | if (isdigit(s[0])) {
|
---|
671 | size = bb_strtou(s, &end, 0);
|
---|
672 | if (errno == ERANGE || size > MAX_FP_TYPE_SIZE
|
---|
673 | || fp_type_size[size] == NO_SIZE
|
---|
674 | ) {
|
---|
675 | bb_error_msg_and_die("invalid type string '%s'; "
|
---|
676 | "%u-byte %s type is not supported",
|
---|
677 | s_orig, size, "floating point");
|
---|
678 | }
|
---|
679 | s = end;
|
---|
680 | }
|
---|
681 | } else {
|
---|
682 | static const uint8_t FDL_sizeof[] = {
|
---|
683 | sizeof(float),
|
---|
684 | sizeof(double),
|
---|
685 | sizeof(longdouble_t),
|
---|
686 | };
|
---|
687 |
|
---|
688 | size = FDL_sizeof[p - FDL];
|
---|
689 | }
|
---|
690 |
|
---|
691 | size_spec = fp_type_size[size];
|
---|
692 |
|
---|
693 | switch (size_spec) {
|
---|
694 | case FLOAT_SINGLE:
|
---|
695 | print_function = print_float;
|
---|
696 | field_width = FLT_DIG + 8;
|
---|
697 | /* Don't use %#e; not all systems support it. */
|
---|
698 | fmt_string = xasprintf(" %%%d.%de", field_width, FLT_DIG);
|
---|
699 | break;
|
---|
700 | case FLOAT_DOUBLE:
|
---|
701 | print_function = print_double;
|
---|
702 | field_width = DBL_DIG + 8;
|
---|
703 | fmt_string = xasprintf(" %%%d.%de", field_width, DBL_DIG);
|
---|
704 | break;
|
---|
705 | default: /* case FLOAT_LONG_DOUBLE: */
|
---|
706 | print_function = print_long_double;
|
---|
707 | field_width = LDBL_DIG + 8;
|
---|
708 | fmt_string = xasprintf(" %%%d.%dLe", field_width, LDBL_DIG);
|
---|
709 | break;
|
---|
710 | }
|
---|
711 | break;
|
---|
712 | }
|
---|
713 |
|
---|
714 | case 'a':
|
---|
715 | ++s;
|
---|
716 | fmt = NAMED_CHARACTER;
|
---|
717 | size_spec = CHAR;
|
---|
718 | print_function = print_named_ascii;
|
---|
719 | field_width = 3;
|
---|
720 | break;
|
---|
721 | case 'c':
|
---|
722 | ++s;
|
---|
723 | fmt = CHARACTER;
|
---|
724 | size_spec = CHAR;
|
---|
725 | print_function = print_ascii;
|
---|
726 | field_width = 3;
|
---|
727 | break;
|
---|
728 | default:
|
---|
729 | bb_error_msg_and_die("invalid character '%c' "
|
---|
730 | "in type string '%s'", *s, s_orig);
|
---|
731 | }
|
---|
732 |
|
---|
733 | tspec->size = size_spec;
|
---|
734 | tspec->fmt = fmt;
|
---|
735 | tspec->print_function = print_function;
|
---|
736 | tspec->fmt_string = fmt_string;
|
---|
737 |
|
---|
738 | tspec->field_width = field_width;
|
---|
739 | tspec->hexl_mode_trailer = (*s == 'z');
|
---|
740 | if (tspec->hexl_mode_trailer)
|
---|
741 | s++;
|
---|
742 |
|
---|
743 | return s;
|
---|
744 | }
|
---|
745 |
|
---|
746 | /* Decode the modern od format string S. Append the decoded
|
---|
747 | representation to the global array SPEC, reallocating SPEC if
|
---|
748 | necessary. */
|
---|
749 |
|
---|
750 | static void
|
---|
751 | decode_format_string(const char *s)
|
---|
752 | {
|
---|
753 | const char *s_orig = s;
|
---|
754 |
|
---|
755 | while (*s != '\0') {
|
---|
756 | struct tspec tspec;
|
---|
757 | const char *next;
|
---|
758 |
|
---|
759 | next = decode_one_format(s_orig, s, &tspec);
|
---|
760 |
|
---|
761 | assert(s != next);
|
---|
762 | s = next;
|
---|
763 | G.spec = xrealloc_vector(G.spec, 4, G.n_specs);
|
---|
764 | memcpy(&G.spec[G.n_specs], &tspec, sizeof(G.spec[0]));
|
---|
765 | G.n_specs++;
|
---|
766 | }
|
---|
767 | }
|
---|
768 |
|
---|
769 | /* Given a list of one or more input filenames FILE_LIST, set the global
|
---|
770 | file pointer IN_STREAM to position N_SKIP in the concatenation of
|
---|
771 | those files. If any file operation fails or if there are fewer than
|
---|
772 | N_SKIP bytes in the combined input, give an error message and return
|
---|
773 | nonzero. When possible, use seek rather than read operations to
|
---|
774 | advance IN_STREAM. */
|
---|
775 |
|
---|
776 | static void
|
---|
777 | skip(off_t n_skip)
|
---|
778 | {
|
---|
779 | if (n_skip == 0)
|
---|
780 | return;
|
---|
781 |
|
---|
782 | while (G.in_stream) { /* !EOF */
|
---|
783 | struct stat file_stats;
|
---|
784 |
|
---|
785 | /* First try seeking. For large offsets, this extra work is
|
---|
786 | worthwhile. If the offset is below some threshold it may be
|
---|
787 | more efficient to move the pointer by reading. There are two
|
---|
788 | issues when trying to seek:
|
---|
789 | - the file must be seekable.
|
---|
790 | - before seeking to the specified position, make sure
|
---|
791 | that the new position is in the current file.
|
---|
792 | Try to do that by getting file's size using fstat.
|
---|
793 | But that will work only for regular files. */
|
---|
794 |
|
---|
795 | /* The st_size field is valid only for regular files
|
---|
796 | (and for symbolic links, which cannot occur here).
|
---|
797 | If the number of bytes left to skip is at least
|
---|
798 | as large as the size of the current file, we can
|
---|
799 | decrement n_skip and go on to the next file. */
|
---|
800 | if (fstat(fileno(G.in_stream), &file_stats) == 0
|
---|
801 | && S_ISREG(file_stats.st_mode) && file_stats.st_size > 0
|
---|
802 | ) {
|
---|
803 | if (file_stats.st_size < n_skip) {
|
---|
804 | n_skip -= file_stats.st_size;
|
---|
805 | /* take "check & close / open_next" route */
|
---|
806 | } else {
|
---|
807 | if (fseeko(G.in_stream, n_skip, SEEK_CUR) != 0)
|
---|
808 | G.exit_code = 1;
|
---|
809 | return;
|
---|
810 | }
|
---|
811 | } else {
|
---|
812 | /* If it's not a regular file with positive size,
|
---|
813 | position the file pointer by reading. */
|
---|
814 | char buf[1024];
|
---|
815 | size_t n_bytes_to_read = 1024;
|
---|
816 | size_t n_bytes_read;
|
---|
817 |
|
---|
818 | while (n_skip > 0) {
|
---|
819 | if (n_skip < n_bytes_to_read)
|
---|
820 | n_bytes_to_read = n_skip;
|
---|
821 | n_bytes_read = fread(buf, 1, n_bytes_to_read, G.in_stream);
|
---|
822 | n_skip -= n_bytes_read;
|
---|
823 | if (n_bytes_read != n_bytes_to_read)
|
---|
824 | break; /* EOF on this file or error */
|
---|
825 | }
|
---|
826 | }
|
---|
827 | if (n_skip == 0)
|
---|
828 | return;
|
---|
829 |
|
---|
830 | check_and_close();
|
---|
831 | open_next_file();
|
---|
832 | }
|
---|
833 |
|
---|
834 | if (n_skip)
|
---|
835 | bb_error_msg_and_die("can't skip past end of combined input");
|
---|
836 | }
|
---|
837 |
|
---|
838 |
|
---|
839 | typedef void FN_format_address(off_t address, char c);
|
---|
840 |
|
---|
841 | static void
|
---|
842 | format_address_none(off_t address UNUSED_PARAM, char c UNUSED_PARAM)
|
---|
843 | {
|
---|
844 | }
|
---|
845 |
|
---|
846 | static char address_fmt[] ALIGN1 = "%0n"OFF_FMT"xc";
|
---|
847 | /* Corresponds to 'x' above */
|
---|
848 | #define address_base_char address_fmt[sizeof(address_fmt)-3]
|
---|
849 | /* Corresponds to 'n' above */
|
---|
850 | #define address_pad_len_char address_fmt[2]
|
---|
851 |
|
---|
852 | static void
|
---|
853 | format_address_std(off_t address, char c)
|
---|
854 | {
|
---|
855 | /* Corresponds to 'c' */
|
---|
856 | address_fmt[sizeof(address_fmt)-2] = c;
|
---|
857 | printf(address_fmt, address);
|
---|
858 | }
|
---|
859 |
|
---|
860 | #if ENABLE_LONG_OPTS
|
---|
861 | /* only used with --traditional */
|
---|
862 | static void
|
---|
863 | format_address_paren(off_t address, char c)
|
---|
864 | {
|
---|
865 | putchar('(');
|
---|
866 | format_address_std(address, ')');
|
---|
867 | if (c) putchar(c);
|
---|
868 | }
|
---|
869 |
|
---|
870 | static void
|
---|
871 | format_address_label(off_t address, char c)
|
---|
872 | {
|
---|
873 | format_address_std(address, ' ');
|
---|
874 | format_address_paren(address + G_pseudo_offset, c);
|
---|
875 | }
|
---|
876 | #endif
|
---|
877 |
|
---|
878 | static void
|
---|
879 | dump_hexl_mode_trailer(size_t n_bytes, const char *block)
|
---|
880 | {
|
---|
881 | fputs(" >", stdout);
|
---|
882 | while (n_bytes--) {
|
---|
883 | unsigned c = *(unsigned char *) block++;
|
---|
884 | c = (ISPRINT(c) ? c : '.');
|
---|
885 | putchar(c);
|
---|
886 | }
|
---|
887 | putchar('<');
|
---|
888 | }
|
---|
889 |
|
---|
890 | /* Write N_BYTES bytes from CURR_BLOCK to standard output once for each
|
---|
891 | of the N_SPEC format specs. CURRENT_OFFSET is the byte address of
|
---|
892 | CURR_BLOCK in the concatenation of input files, and it is printed
|
---|
893 | (optionally) only before the output line associated with the first
|
---|
894 | format spec. When duplicate blocks are being abbreviated, the output
|
---|
895 | for a sequence of identical input blocks is the output for the first
|
---|
896 | block followed by an asterisk alone on a line. It is valid to compare
|
---|
897 | the blocks PREV_BLOCK and CURR_BLOCK only when N_BYTES == BYTES_PER_BLOCK.
|
---|
898 | That condition may be false only for the last input block -- and then
|
---|
899 | only when it has not been padded to length BYTES_PER_BLOCK. */
|
---|
900 |
|
---|
901 | static void
|
---|
902 | write_block(off_t current_offset, size_t n_bytes,
|
---|
903 | const char *prev_block, const char *curr_block)
|
---|
904 | {
|
---|
905 | unsigned i;
|
---|
906 |
|
---|
907 | if (!(option_mask32 & OPT_v)
|
---|
908 | && G.not_first
|
---|
909 | && n_bytes == G.bytes_per_block
|
---|
910 | && memcmp(prev_block, curr_block, G.bytes_per_block) == 0
|
---|
911 | ) {
|
---|
912 | if (G.prev_pair_equal) {
|
---|
913 | /* The two preceding blocks were equal, and the current
|
---|
914 | block is the same as the last one, so print nothing. */
|
---|
915 | } else {
|
---|
916 | puts("*");
|
---|
917 | G.prev_pair_equal = 1;
|
---|
918 | }
|
---|
919 | } else {
|
---|
920 | G.not_first = 1;
|
---|
921 | G.prev_pair_equal = 0;
|
---|
922 | for (i = 0; i < G.n_specs; i++) {
|
---|
923 | if (i == 0)
|
---|
924 | G.format_address(current_offset, '\0');
|
---|
925 | else
|
---|
926 | printf("%*s", address_pad_len_char - '0', "");
|
---|
927 | (*G.spec[i].print_function) (n_bytes, curr_block, G.spec[i].fmt_string);
|
---|
928 | if (G.spec[i].hexl_mode_trailer) {
|
---|
929 | /* space-pad out to full line width, then dump the trailer */
|
---|
930 | unsigned datum_width = width_bytes[G.spec[i].size];
|
---|
931 | unsigned blank_fields = (G.bytes_per_block - n_bytes) / datum_width;
|
---|
932 | unsigned field_width = G.spec[i].field_width + 1;
|
---|
933 | printf("%*s", blank_fields * field_width, "");
|
---|
934 | dump_hexl_mode_trailer(n_bytes, curr_block);
|
---|
935 | }
|
---|
936 | putchar('\n');
|
---|
937 | }
|
---|
938 | }
|
---|
939 | }
|
---|
940 |
|
---|
941 | static void
|
---|
942 | read_block(size_t n, char *block, size_t *n_bytes_in_buffer)
|
---|
943 | {
|
---|
944 | assert(0 < n && n <= G.bytes_per_block);
|
---|
945 |
|
---|
946 | *n_bytes_in_buffer = 0;
|
---|
947 |
|
---|
948 | if (n == 0)
|
---|
949 | return;
|
---|
950 |
|
---|
951 | while (G.in_stream != NULL) { /* EOF. */
|
---|
952 | size_t n_needed;
|
---|
953 | size_t n_read;
|
---|
954 |
|
---|
955 | n_needed = n - *n_bytes_in_buffer;
|
---|
956 | n_read = fread(block + *n_bytes_in_buffer, 1, n_needed, G.in_stream);
|
---|
957 | *n_bytes_in_buffer += n_read;
|
---|
958 | if (n_read == n_needed)
|
---|
959 | break;
|
---|
960 | /* error check is done in check_and_close */
|
---|
961 | check_and_close();
|
---|
962 | open_next_file();
|
---|
963 | }
|
---|
964 | }
|
---|
965 |
|
---|
966 | /* Return the least common multiple of the sizes associated
|
---|
967 | with the format specs. */
|
---|
968 |
|
---|
969 | static int
|
---|
970 | get_lcm(void)
|
---|
971 | {
|
---|
972 | size_t i;
|
---|
973 | int l_c_m = 1;
|
---|
974 |
|
---|
975 | for (i = 0; i < G.n_specs; i++)
|
---|
976 | l_c_m = lcm(l_c_m, width_bytes[(int) G.spec[i].size]);
|
---|
977 | return l_c_m;
|
---|
978 | }
|
---|
979 |
|
---|
980 | /* Read a chunk of size BYTES_PER_BLOCK from the input files, write the
|
---|
981 | formatted block to standard output, and repeat until the specified
|
---|
982 | maximum number of bytes has been read or until all input has been
|
---|
983 | processed. If the last block read is smaller than BYTES_PER_BLOCK
|
---|
984 | and its size is not a multiple of the size associated with a format
|
---|
985 | spec, extend the input block with zero bytes until its length is a
|
---|
986 | multiple of all format spec sizes. Write the final block. Finally,
|
---|
987 | write on a line by itself the offset of the byte after the last byte
|
---|
988 | read. */
|
---|
989 |
|
---|
990 | static void
|
---|
991 | dump(off_t current_offset, off_t end_offset)
|
---|
992 | {
|
---|
993 | char *block[2];
|
---|
994 | int idx;
|
---|
995 | size_t n_bytes_read;
|
---|
996 |
|
---|
997 | block[0] = xmalloc(2 * G.bytes_per_block);
|
---|
998 | block[1] = block[0] + G.bytes_per_block;
|
---|
999 |
|
---|
1000 | idx = 0;
|
---|
1001 | if (option_mask32 & OPT_N) {
|
---|
1002 | while (1) {
|
---|
1003 | size_t n_needed;
|
---|
1004 | if (current_offset >= end_offset) {
|
---|
1005 | n_bytes_read = 0;
|
---|
1006 | break;
|
---|
1007 | }
|
---|
1008 | n_needed = MIN(end_offset - current_offset, (off_t) G.bytes_per_block);
|
---|
1009 | read_block(n_needed, block[idx], &n_bytes_read);
|
---|
1010 | if (n_bytes_read < G.bytes_per_block)
|
---|
1011 | break;
|
---|
1012 | assert(n_bytes_read == G.bytes_per_block);
|
---|
1013 | write_block(current_offset, n_bytes_read, block[idx ^ 1], block[idx]);
|
---|
1014 | current_offset += n_bytes_read;
|
---|
1015 | idx ^= 1;
|
---|
1016 | }
|
---|
1017 | } else {
|
---|
1018 | while (1) {
|
---|
1019 | read_block(G.bytes_per_block, block[idx], &n_bytes_read);
|
---|
1020 | if (n_bytes_read < G.bytes_per_block)
|
---|
1021 | break;
|
---|
1022 | assert(n_bytes_read == G.bytes_per_block);
|
---|
1023 | write_block(current_offset, n_bytes_read, block[idx ^ 1], block[idx]);
|
---|
1024 | current_offset += n_bytes_read;
|
---|
1025 | idx ^= 1;
|
---|
1026 | }
|
---|
1027 | }
|
---|
1028 |
|
---|
1029 | if (n_bytes_read > 0) {
|
---|
1030 | int l_c_m;
|
---|
1031 | size_t bytes_to_write;
|
---|
1032 |
|
---|
1033 | l_c_m = get_lcm();
|
---|
1034 |
|
---|
1035 | /* Make bytes_to_write the smallest multiple of l_c_m that
|
---|
1036 | is at least as large as n_bytes_read. */
|
---|
1037 | bytes_to_write = l_c_m * ((n_bytes_read + l_c_m - 1) / l_c_m);
|
---|
1038 |
|
---|
1039 | memset(block[idx] + n_bytes_read, 0, bytes_to_write - n_bytes_read);
|
---|
1040 | write_block(current_offset, bytes_to_write,
|
---|
1041 | block[idx ^ 1], block[idx]);
|
---|
1042 | current_offset += n_bytes_read;
|
---|
1043 | }
|
---|
1044 |
|
---|
1045 | G.format_address(current_offset, '\n');
|
---|
1046 |
|
---|
1047 | if ((option_mask32 & OPT_N) && current_offset >= end_offset)
|
---|
1048 | check_and_close();
|
---|
1049 |
|
---|
1050 | free(block[0]);
|
---|
1051 | }
|
---|
1052 |
|
---|
1053 | /* Read N bytes into BLOCK from the concatenation of the input files
|
---|
1054 | named in the global array FILE_LIST. On the first call to this
|
---|
1055 | function, the global variable IN_STREAM is expected to be an open
|
---|
1056 | stream associated with the input file INPUT_FILENAME. If all N
|
---|
1057 | bytes cannot be read from IN_STREAM, close IN_STREAM and update
|
---|
1058 | the global variables IN_STREAM and INPUT_FILENAME. Then try to
|
---|
1059 | read the remaining bytes from the newly opened file. Repeat if
|
---|
1060 | necessary until EOF is reached for the last file in FILE_LIST.
|
---|
1061 | On subsequent calls, don't modify BLOCK and return zero. Set
|
---|
1062 | *N_BYTES_IN_BUFFER to the number of bytes read. If an error occurs,
|
---|
1063 | it will be detected through ferror when the stream is about to be
|
---|
1064 | closed. If there is an error, give a message but continue reading
|
---|
1065 | as usual and return nonzero. Otherwise return zero. */
|
---|
1066 |
|
---|
1067 | /* STRINGS mode. Find each "string constant" in the input.
|
---|
1068 | A string constant is a run of at least 'string_min' ASCII
|
---|
1069 | graphic (or formatting) characters terminated by a null.
|
---|
1070 | Based on a function written by Richard Stallman for a
|
---|
1071 | traditional version of od. */
|
---|
1072 |
|
---|
1073 | static void
|
---|
1074 | dump_strings(off_t address, off_t end_offset)
|
---|
1075 | {
|
---|
1076 | unsigned bufsize = MAX(100, G.string_min);
|
---|
1077 | unsigned char *buf = xmalloc(bufsize);
|
---|
1078 |
|
---|
1079 | while (1) {
|
---|
1080 | size_t i;
|
---|
1081 | int c;
|
---|
1082 |
|
---|
1083 | /* See if the next 'G.string_min' chars are all printing chars. */
|
---|
1084 | tryline:
|
---|
1085 | if ((option_mask32 & OPT_N) && (end_offset - G.string_min <= address))
|
---|
1086 | break;
|
---|
1087 | i = 0;
|
---|
1088 | while (!(option_mask32 & OPT_N) || address < end_offset) {
|
---|
1089 | if (i == bufsize) {
|
---|
1090 | bufsize += bufsize/8;
|
---|
1091 | buf = xrealloc(buf, bufsize);
|
---|
1092 | }
|
---|
1093 |
|
---|
1094 | while (G.in_stream) { /* !EOF */
|
---|
1095 | c = fgetc(G.in_stream);
|
---|
1096 | if (c != EOF)
|
---|
1097 | goto got_char;
|
---|
1098 | check_and_close();
|
---|
1099 | open_next_file();
|
---|
1100 | }
|
---|
1101 | /* EOF */
|
---|
1102 | goto ret;
|
---|
1103 | got_char:
|
---|
1104 | address++;
|
---|
1105 | if (!c)
|
---|
1106 | break;
|
---|
1107 | if (!ISPRINT(c))
|
---|
1108 | goto tryline; /* It isn't; give up on this string. */
|
---|
1109 | buf[i++] = c; /* String continues; store it all. */
|
---|
1110 | }
|
---|
1111 |
|
---|
1112 | if (i < G.string_min) /* Too short! */
|
---|
1113 | goto tryline;
|
---|
1114 |
|
---|
1115 | /* If we get here, the string is all printable and NUL-terminated */
|
---|
1116 | buf[i] = 0;
|
---|
1117 | G.format_address(address - i - 1, ' ');
|
---|
1118 |
|
---|
1119 | for (i = 0; (c = buf[i]); i++) {
|
---|
1120 | switch (c) {
|
---|
1121 | case '\007': fputs("\\a", stdout); break;
|
---|
1122 | case '\b': fputs("\\b", stdout); break;
|
---|
1123 | case '\f': fputs("\\f", stdout); break;
|
---|
1124 | case '\n': fputs("\\n", stdout); break;
|
---|
1125 | case '\r': fputs("\\r", stdout); break;
|
---|
1126 | case '\t': fputs("\\t", stdout); break;
|
---|
1127 | case '\v': fputs("\\v", stdout); break;
|
---|
1128 | default: putchar(c);
|
---|
1129 | }
|
---|
1130 | }
|
---|
1131 | putchar('\n');
|
---|
1132 | }
|
---|
1133 |
|
---|
1134 | /* We reach this point only if we search through
|
---|
1135 | (max_bytes_to_format - G.string_min) bytes before reaching EOF. */
|
---|
1136 | check_and_close();
|
---|
1137 | ret:
|
---|
1138 | free(buf);
|
---|
1139 | }
|
---|
1140 |
|
---|
1141 | #if ENABLE_LONG_OPTS
|
---|
1142 | /* If S is a valid traditional offset specification with an optional
|
---|
1143 | leading '+' return nonzero and set *OFFSET to the offset it denotes. */
|
---|
1144 |
|
---|
1145 | static int
|
---|
1146 | parse_old_offset(const char *s, off_t *offset)
|
---|
1147 | {
|
---|
1148 | static const struct suffix_mult Bb[] = {
|
---|
1149 | { "B", 1024 },
|
---|
1150 | { "b", 512 },
|
---|
1151 | { "", 0 }
|
---|
1152 | };
|
---|
1153 | char *p;
|
---|
1154 | int radix;
|
---|
1155 |
|
---|
1156 | /* Skip over any leading '+'. */
|
---|
1157 | if (s[0] == '+') ++s;
|
---|
1158 | if (!isdigit(s[0])) return 0; /* not a number */
|
---|
1159 |
|
---|
1160 | /* Determine the radix we'll use to interpret S. If there is a '.',
|
---|
1161 | * it's decimal, otherwise, if the string begins with '0X'or '0x',
|
---|
1162 | * it's hexadecimal, else octal. */
|
---|
1163 | p = strchr(s, '.');
|
---|
1164 | radix = 8;
|
---|
1165 | if (p) {
|
---|
1166 | p[0] = '\0'; /* cheating */
|
---|
1167 | radix = 10;
|
---|
1168 | } else if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'))
|
---|
1169 | radix = 16;
|
---|
1170 |
|
---|
1171 | *offset = xstrtooff_sfx(s, radix, Bb);
|
---|
1172 | if (p) p[0] = '.';
|
---|
1173 |
|
---|
1174 | return (*offset >= 0);
|
---|
1175 | }
|
---|
1176 | #endif
|
---|
1177 |
|
---|
1178 | int od_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
1179 | int od_main(int argc UNUSED_PARAM, char **argv)
|
---|
1180 | {
|
---|
1181 | #if ENABLE_LONG_OPTS
|
---|
1182 | static const char od_longopts[] ALIGN1 =
|
---|
1183 | "skip-bytes\0" Required_argument "j"
|
---|
1184 | "address-radix\0" Required_argument "A"
|
---|
1185 | "read-bytes\0" Required_argument "N"
|
---|
1186 | "format\0" Required_argument "t"
|
---|
1187 | "output-duplicates\0" No_argument "v"
|
---|
1188 | /* Yes, it's true: -S NUM, but --strings[=NUM]!
|
---|
1189 | * that is, NUM is mandatory for -S but optional for --strings!
|
---|
1190 | */
|
---|
1191 | "strings\0" Optional_argument "S"
|
---|
1192 | "width\0" Optional_argument "w"
|
---|
1193 | "traditional\0" No_argument "\xff"
|
---|
1194 | ;
|
---|
1195 | #endif
|
---|
1196 | const char *str_A, *str_N, *str_j, *str_S = "3";
|
---|
1197 | llist_t *lst_t = NULL;
|
---|
1198 | unsigned opt;
|
---|
1199 | int l_c_m;
|
---|
1200 | /* The number of input bytes to skip before formatting and writing. */
|
---|
1201 | off_t n_bytes_to_skip = 0;
|
---|
1202 | /* The offset of the first byte after the last byte to be formatted. */
|
---|
1203 | off_t end_offset = 0;
|
---|
1204 | /* The maximum number of bytes that will be formatted. */
|
---|
1205 | off_t max_bytes_to_format = 0;
|
---|
1206 |
|
---|
1207 | INIT_G();
|
---|
1208 |
|
---|
1209 | /*G.spec = NULL; - already is */
|
---|
1210 | G.format_address = format_address_std;
|
---|
1211 | address_base_char = 'o';
|
---|
1212 | address_pad_len_char = '7';
|
---|
1213 |
|
---|
1214 | /* Parse command line */
|
---|
1215 | opt_complementary = "w+:t::"; /* -w N, -t is a list */
|
---|
1216 | #if ENABLE_LONG_OPTS
|
---|
1217 | applet_long_options = od_longopts;
|
---|
1218 | #endif
|
---|
1219 | opt = OD_GETOPT32();
|
---|
1220 | argv += optind;
|
---|
1221 | if (opt & OPT_A) {
|
---|
1222 | static const char doxn[] ALIGN1 = "doxn";
|
---|
1223 | static const char doxn_address_base_char[] ALIGN1 = {
|
---|
1224 | 'u', 'o', 'x', /* '?' fourth one is not important */
|
---|
1225 | };
|
---|
1226 | static const uint8_t doxn_address_pad_len_char[] ALIGN1 = {
|
---|
1227 | '7', '7', '6', /* '?' */
|
---|
1228 | };
|
---|
1229 | char *p;
|
---|
1230 | int pos;
|
---|
1231 | p = strchr(doxn, str_A[0]);
|
---|
1232 | if (!p)
|
---|
1233 | bb_error_msg_and_die("bad output address radix "
|
---|
1234 | "'%c' (must be [doxn])", str_A[0]);
|
---|
1235 | pos = p - doxn;
|
---|
1236 | if (pos == 3) G.format_address = format_address_none;
|
---|
1237 | address_base_char = doxn_address_base_char[pos];
|
---|
1238 | address_pad_len_char = doxn_address_pad_len_char[pos];
|
---|
1239 | }
|
---|
1240 | if (opt & OPT_N) {
|
---|
1241 | max_bytes_to_format = xstrtooff_sfx(str_N, 0, bkm_suffixes);
|
---|
1242 | }
|
---|
1243 | if (opt & OPT_a) decode_format_string("a");
|
---|
1244 | if (opt & OPT_b) decode_format_string("oC");
|
---|
1245 | if (opt & OPT_c) decode_format_string("c");
|
---|
1246 | if (opt & OPT_d) decode_format_string("u2");
|
---|
1247 | if (opt & OPT_f) decode_format_string("fF");
|
---|
1248 | if (opt & OPT_h) decode_format_string("x2");
|
---|
1249 | if (opt & OPT_i) decode_format_string("d2");
|
---|
1250 | if (opt & OPT_j) n_bytes_to_skip = xstrtooff_sfx(str_j, 0, bkm_suffixes);
|
---|
1251 | if (opt & OPT_l) decode_format_string("d4");
|
---|
1252 | if (opt & OPT_o) decode_format_string("o2");
|
---|
1253 | while (lst_t) {
|
---|
1254 | decode_format_string(llist_pop(&lst_t));
|
---|
1255 | }
|
---|
1256 | if (opt & OPT_x) decode_format_string("x2");
|
---|
1257 | if (opt & OPT_s) decode_format_string("d2");
|
---|
1258 | if (opt & OPT_S) {
|
---|
1259 | G.string_min = xstrtou_sfx(str_S, 0, bkm_suffixes);
|
---|
1260 | }
|
---|
1261 |
|
---|
1262 | // Bloat:
|
---|
1263 | //if ((option_mask32 & OPT_S) && G.n_specs > 0)
|
---|
1264 | // bb_error_msg_and_die("no type may be specified when dumping strings");
|
---|
1265 |
|
---|
1266 | /* If the --traditional option is used, there may be from
|
---|
1267 | * 0 to 3 remaining command line arguments; handle each case
|
---|
1268 | * separately.
|
---|
1269 | * od [FILE] [[+]OFFSET[.][b] [[+]LABEL[.][b]]]
|
---|
1270 | * The offset and pseudo_start have the same syntax.
|
---|
1271 | *
|
---|
1272 | * FIXME: POSIX 1003.1-2001 with XSI requires support for the
|
---|
1273 | * traditional syntax even if --traditional is not given. */
|
---|
1274 |
|
---|
1275 | #if ENABLE_LONG_OPTS
|
---|
1276 | if (opt & OPT_traditional) {
|
---|
1277 | if (argv[0]) {
|
---|
1278 | off_t pseudo_start = -1;
|
---|
1279 | off_t o1, o2;
|
---|
1280 |
|
---|
1281 | if (!argv[1]) { /* one arg */
|
---|
1282 | if (parse_old_offset(argv[0], &o1)) {
|
---|
1283 | /* od --traditional OFFSET */
|
---|
1284 | n_bytes_to_skip = o1;
|
---|
1285 | argv++;
|
---|
1286 | }
|
---|
1287 | /* od --traditional FILE */
|
---|
1288 | } else if (!argv[2]) { /* two args */
|
---|
1289 | if (parse_old_offset(argv[0], &o1)
|
---|
1290 | && parse_old_offset(argv[1], &o2)
|
---|
1291 | ) {
|
---|
1292 | /* od --traditional OFFSET LABEL */
|
---|
1293 | n_bytes_to_skip = o1;
|
---|
1294 | pseudo_start = o2;
|
---|
1295 | argv += 2;
|
---|
1296 | } else if (parse_old_offset(argv[1], &o2)) {
|
---|
1297 | /* od --traditional FILE OFFSET */
|
---|
1298 | n_bytes_to_skip = o2;
|
---|
1299 | argv[1] = NULL;
|
---|
1300 | } else {
|
---|
1301 | bb_error_msg_and_die("invalid second argument '%s'", argv[1]);
|
---|
1302 | }
|
---|
1303 | } else if (!argv[3]) { /* three args */
|
---|
1304 | if (parse_old_offset(argv[1], &o1)
|
---|
1305 | && parse_old_offset(argv[2], &o2)
|
---|
1306 | ) {
|
---|
1307 | /* od --traditional FILE OFFSET LABEL */
|
---|
1308 | n_bytes_to_skip = o1;
|
---|
1309 | pseudo_start = o2;
|
---|
1310 | argv[1] = NULL;
|
---|
1311 | } else {
|
---|
1312 | bb_error_msg_and_die("the last two arguments must be offsets");
|
---|
1313 | }
|
---|
1314 | } else { /* >3 args */
|
---|
1315 | bb_error_msg_and_die("too many arguments");
|
---|
1316 | }
|
---|
1317 |
|
---|
1318 | if (pseudo_start >= 0) {
|
---|
1319 | if (G.format_address == format_address_none) {
|
---|
1320 | address_base_char = 'o';
|
---|
1321 | address_pad_len_char = '7';
|
---|
1322 | G.format_address = format_address_paren;
|
---|
1323 | } else {
|
---|
1324 | G.format_address = format_address_label;
|
---|
1325 | }
|
---|
1326 | G_pseudo_offset = pseudo_start - n_bytes_to_skip;
|
---|
1327 | }
|
---|
1328 | }
|
---|
1329 | /* else: od --traditional (without args) */
|
---|
1330 | }
|
---|
1331 | #endif
|
---|
1332 |
|
---|
1333 | if (option_mask32 & OPT_N) {
|
---|
1334 | end_offset = n_bytes_to_skip + max_bytes_to_format;
|
---|
1335 | if (end_offset < n_bytes_to_skip)
|
---|
1336 | bb_error_msg_and_die("SKIP + SIZE is too large");
|
---|
1337 | }
|
---|
1338 |
|
---|
1339 | if (G.n_specs == 0) {
|
---|
1340 | decode_format_string("o2");
|
---|
1341 | /*G.n_specs = 1; - done by decode_format_string */
|
---|
1342 | }
|
---|
1343 |
|
---|
1344 | /* If no files were listed on the command line,
|
---|
1345 | set the global pointer FILE_LIST so that it
|
---|
1346 | references the null-terminated list of one name: "-". */
|
---|
1347 | G.file_list = bb_argv_dash;
|
---|
1348 | if (argv[0]) {
|
---|
1349 | /* Set the global pointer FILE_LIST so that it
|
---|
1350 | references the first file-argument on the command-line. */
|
---|
1351 | G.file_list = (char const *const *) argv;
|
---|
1352 | }
|
---|
1353 |
|
---|
1354 | /* Open the first input file */
|
---|
1355 | open_next_file();
|
---|
1356 | /* Skip over any unwanted header bytes */
|
---|
1357 | skip(n_bytes_to_skip);
|
---|
1358 | if (!G.in_stream)
|
---|
1359 | return EXIT_FAILURE;
|
---|
1360 |
|
---|
1361 | /* Compute output block length */
|
---|
1362 | l_c_m = get_lcm();
|
---|
1363 |
|
---|
1364 | if (opt & OPT_w) { /* -w: width */
|
---|
1365 | if (!G.bytes_per_block || G.bytes_per_block % l_c_m != 0) {
|
---|
1366 | bb_error_msg("warning: invalid width %u; using %d instead",
|
---|
1367 | (unsigned)G.bytes_per_block, l_c_m);
|
---|
1368 | G.bytes_per_block = l_c_m;
|
---|
1369 | }
|
---|
1370 | } else {
|
---|
1371 | G.bytes_per_block = l_c_m;
|
---|
1372 | if (l_c_m < DEFAULT_BYTES_PER_BLOCK)
|
---|
1373 | G.bytes_per_block *= DEFAULT_BYTES_PER_BLOCK / l_c_m;
|
---|
1374 | }
|
---|
1375 |
|
---|
1376 | #ifdef DEBUG
|
---|
1377 | for (i = 0; i < G.n_specs; i++) {
|
---|
1378 | printf("%d: fmt=\"%s\" width=%d\n",
|
---|
1379 | i, spec[i].fmt_string, width_bytes[spec[i].size]);
|
---|
1380 | }
|
---|
1381 | #endif
|
---|
1382 |
|
---|
1383 | if (option_mask32 & OPT_S)
|
---|
1384 | dump_strings(n_bytes_to_skip, end_offset);
|
---|
1385 | else
|
---|
1386 | dump(n_bytes_to_skip, end_offset);
|
---|
1387 |
|
---|
1388 | if (fclose(stdin))
|
---|
1389 | bb_perror_msg_and_die(bb_msg_standard_input);
|
---|
1390 |
|
---|
1391 | return G.exit_code;
|
---|
1392 | }
|
---|