| 1 | /* strings -- print the strings of printable characters in files |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
| 19 | 02110-1301, USA. */ |
| 20 | \f |
| 21 | /* Usage: strings [options] file... |
| 22 | |
| 23 | Options: |
| 24 | --all |
| 25 | -a |
| 26 | - Do not scan only the initialized data section of object files. |
| 27 | |
| 28 | --print-file-name |
| 29 | -f Print the name of the file before each string. |
| 30 | |
| 31 | --bytes=min-len |
| 32 | -n min-len |
| 33 | -min-len Print graphic char sequences, MIN-LEN or more bytes long, |
| 34 | that are followed by a NUL or a newline. Default is 4. |
| 35 | |
| 36 | --radix={o,x,d} |
| 37 | -t {o,x,d} Print the offset within the file before each string, |
| 38 | in octal/hex/decimal. |
| 39 | |
| 40 | -o Like -to. (Some other implementations have -o like -to, |
| 41 | others like -td. We chose one arbitrarily.) |
| 42 | |
| 43 | --encoding={s,S,b,l,B,L} |
| 44 | -e {s,S,b,l,B,L} |
| 45 | Select character encoding: 7-bit-character, 8-bit-character, |
| 46 | bigendian 16-bit, littleendian 16-bit, bigendian 32-bit, |
| 47 | littleendian 32-bit. |
| 48 | |
| 49 | --target=BFDNAME |
| 50 | -T {bfdname} |
| 51 | Specify a non-default object file format. |
| 52 | |
| 53 | --help |
| 54 | -h Print the usage message on the standard output. |
| 55 | |
| 56 | --version |
| 57 | -V |
| 58 | -v Print the program version number. |
| 59 | |
| 60 | Written by Richard Stallman <rms@gnu.ai.mit.edu> |
| 61 | and David MacKenzie <djm@gnu.ai.mit.edu>. */ |
| 62 | |
| 63 | #include "sysdep.h" |
| 64 | #include "bfd.h" |
| 65 | #include "getopt.h" |
| 66 | #include "libiberty.h" |
| 67 | #include "safe-ctype.h" |
| 68 | #include "bucomm.h" |
| 69 | |
| 70 | #define STRING_ISGRAPHIC(c) \ |
| 71 | ( (c) >= 0 \ |
| 72 | && (c) <= 255 \ |
| 73 | && ((c) == '\t' || ISPRINT (c) || (encoding == 'S' && (c) > 127))) |
| 74 | |
| 75 | #ifndef errno |
| 76 | extern int errno; |
| 77 | #endif |
| 78 | |
| 79 | /* The BFD section flags that identify an initialized data section. */ |
| 80 | #define DATA_FLAGS (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS) |
| 81 | |
| 82 | /* Radix for printing addresses (must be 8, 10 or 16). */ |
| 83 | static int address_radix; |
| 84 | |
| 85 | /* Minimum length of sequence of graphic chars to trigger output. */ |
| 86 | static int string_min; |
| 87 | |
| 88 | /* TRUE means print address within file for each string. */ |
| 89 | static bfd_boolean print_addresses; |
| 90 | |
| 91 | /* TRUE means print filename for each string. */ |
| 92 | static bfd_boolean print_filenames; |
| 93 | |
| 94 | /* TRUE means for object files scan only the data section. */ |
| 95 | static bfd_boolean datasection_only; |
| 96 | |
| 97 | /* TRUE if we found an initialized data section in the current file. */ |
| 98 | static bfd_boolean got_a_section; |
| 99 | |
| 100 | /* The BFD object file format. */ |
| 101 | static char *target; |
| 102 | |
| 103 | /* The character encoding format. */ |
| 104 | static char encoding; |
| 105 | static int encoding_bytes; |
| 106 | |
| 107 | static struct option long_options[] = |
| 108 | { |
| 109 | {"all", no_argument, NULL, 'a'}, |
| 110 | {"print-file-name", no_argument, NULL, 'f'}, |
| 111 | {"bytes", required_argument, NULL, 'n'}, |
| 112 | {"radix", required_argument, NULL, 't'}, |
| 113 | {"encoding", required_argument, NULL, 'e'}, |
| 114 | {"target", required_argument, NULL, 'T'}, |
| 115 | {"help", no_argument, NULL, 'h'}, |
| 116 | {"version", no_argument, NULL, 'v'}, |
| 117 | {NULL, 0, NULL, 0} |
| 118 | }; |
| 119 | |
| 120 | /* Records the size of a named file so that we |
| 121 | do not repeatedly run bfd_stat() on it. */ |
| 122 | |
| 123 | typedef struct |
| 124 | { |
| 125 | const char * filename; |
| 126 | bfd_size_type filesize; |
| 127 | } filename_and_size_t; |
| 128 | |
| 129 | static void strings_a_section (bfd *, asection *, void *); |
| 130 | static bfd_boolean strings_object_file (const char *); |
| 131 | static bfd_boolean strings_file (char *file); |
| 132 | static void print_strings (const char *, FILE *, file_ptr, int, int, char *); |
| 133 | static void usage (FILE *, int); |
| 134 | static long get_char (FILE *, file_ptr *, int *, char **); |
| 135 | \f |
| 136 | int main (int, char **); |
| 137 | |
| 138 | int |
| 139 | main (int argc, char **argv) |
| 140 | { |
| 141 | int optc; |
| 142 | int exit_status = 0; |
| 143 | bfd_boolean files_given = FALSE; |
| 144 | char *s; |
| 145 | int numeric_opt = 0; |
| 146 | |
| 147 | #if defined (HAVE_SETLOCALE) |
| 148 | setlocale (LC_ALL, ""); |
| 149 | #endif |
| 150 | bindtextdomain (PACKAGE, LOCALEDIR); |
| 151 | textdomain (PACKAGE); |
| 152 | |
| 153 | program_name = argv[0]; |
| 154 | xmalloc_set_program_name (program_name); |
| 155 | |
| 156 | expandargv (&argc, &argv); |
| 157 | |
| 158 | string_min = 4; |
| 159 | print_addresses = FALSE; |
| 160 | print_filenames = FALSE; |
| 161 | datasection_only = TRUE; |
| 162 | target = NULL; |
| 163 | encoding = 's'; |
| 164 | |
| 165 | while ((optc = getopt_long (argc, argv, "afhHn:ot:e:T:Vv0123456789", |
| 166 | long_options, (int *) 0)) != EOF) |
| 167 | { |
| 168 | switch (optc) |
| 169 | { |
| 170 | case 'a': |
| 171 | datasection_only = FALSE; |
| 172 | break; |
| 173 | |
| 174 | case 'f': |
| 175 | print_filenames = TRUE; |
| 176 | break; |
| 177 | |
| 178 | case 'H': |
| 179 | case 'h': |
| 180 | usage (stdout, 0); |
| 181 | |
| 182 | case 'n': |
| 183 | string_min = (int) strtoul (optarg, &s, 0); |
| 184 | if (s != NULL && *s != 0) |
| 185 | fatal (_("invalid integer argument %s"), optarg); |
| 186 | break; |
| 187 | |
| 188 | case 'o': |
| 189 | print_addresses = TRUE; |
| 190 | address_radix = 8; |
| 191 | break; |
| 192 | |
| 193 | case 't': |
| 194 | print_addresses = TRUE; |
| 195 | if (optarg[1] != '\0') |
| 196 | usage (stderr, 1); |
| 197 | switch (optarg[0]) |
| 198 | { |
| 199 | case 'o': |
| 200 | address_radix = 8; |
| 201 | break; |
| 202 | |
| 203 | case 'd': |
| 204 | address_radix = 10; |
| 205 | break; |
| 206 | |
| 207 | case 'x': |
| 208 | address_radix = 16; |
| 209 | break; |
| 210 | |
| 211 | default: |
| 212 | usage (stderr, 1); |
| 213 | } |
| 214 | break; |
| 215 | |
| 216 | case 'T': |
| 217 | target = optarg; |
| 218 | break; |
| 219 | |
| 220 | case 'e': |
| 221 | if (optarg[1] != '\0') |
| 222 | usage (stderr, 1); |
| 223 | encoding = optarg[0]; |
| 224 | break; |
| 225 | |
| 226 | case 'V': |
| 227 | case 'v': |
| 228 | print_version ("strings"); |
| 229 | break; |
| 230 | |
| 231 | case '?': |
| 232 | usage (stderr, 1); |
| 233 | |
| 234 | default: |
| 235 | numeric_opt = optind; |
| 236 | break; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | if (numeric_opt != 0) |
| 241 | { |
| 242 | string_min = (int) strtoul (argv[numeric_opt - 1] + 1, &s, 0); |
| 243 | if (s != NULL && *s != 0) |
| 244 | fatal (_("invalid integer argument %s"), argv[numeric_opt - 1] + 1); |
| 245 | } |
| 246 | if (string_min < 1) |
| 247 | fatal (_("invalid minimum string length %d"), string_min); |
| 248 | |
| 249 | switch (encoding) |
| 250 | { |
| 251 | case 'S': |
| 252 | case 's': |
| 253 | encoding_bytes = 1; |
| 254 | break; |
| 255 | case 'b': |
| 256 | case 'l': |
| 257 | encoding_bytes = 2; |
| 258 | break; |
| 259 | case 'B': |
| 260 | case 'L': |
| 261 | encoding_bytes = 4; |
| 262 | break; |
| 263 | default: |
| 264 | usage (stderr, 1); |
| 265 | } |
| 266 | |
| 267 | bfd_init (); |
| 268 | set_default_bfd_target (); |
| 269 | |
| 270 | if (optind >= argc) |
| 271 | { |
| 272 | datasection_only = FALSE; |
| 273 | SET_BINARY (fileno (stdin)); |
| 274 | print_strings ("{standard input}", stdin, 0, 0, 0, (char *) NULL); |
| 275 | files_given = TRUE; |
| 276 | } |
| 277 | else |
| 278 | { |
| 279 | for (; optind < argc; ++optind) |
| 280 | { |
| 281 | if (strcmp (argv[optind], "-") == 0) |
| 282 | datasection_only = FALSE; |
| 283 | else |
| 284 | { |
| 285 | files_given = TRUE; |
| 286 | exit_status |= strings_file (argv[optind]) == FALSE; |
| 287 | } |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | if (!files_given) |
| 292 | usage (stderr, 1); |
| 293 | |
| 294 | return (exit_status); |
| 295 | } |
| 296 | \f |
| 297 | /* Scan section SECT of the file ABFD, whose printable name is in |
| 298 | ARG->filename and whose size might be in ARG->filesize. If it |
| 299 | contains initialized data set `got_a_section' and print the |
| 300 | strings in it. |
| 301 | |
| 302 | FIXME: We ought to be able to return error codes/messages for |
| 303 | certain conditions. */ |
| 304 | |
| 305 | static void |
| 306 | strings_a_section (bfd *abfd, asection *sect, void *arg) |
| 307 | { |
| 308 | filename_and_size_t * filename_and_sizep; |
| 309 | bfd_size_type *filesizep; |
| 310 | bfd_size_type sectsize; |
| 311 | void *mem; |
| 312 | |
| 313 | if ((sect->flags & DATA_FLAGS) != DATA_FLAGS) |
| 314 | return; |
| 315 | |
| 316 | sectsize = bfd_get_section_size (sect); |
| 317 | |
| 318 | if (sectsize <= 0) |
| 319 | return; |
| 320 | |
| 321 | /* Get the size of the file. This might have been cached for us. */ |
| 322 | filename_and_sizep = (filename_and_size_t *) arg; |
| 323 | filesizep = & filename_and_sizep->filesize; |
| 324 | |
| 325 | if (*filesizep == 0) |
| 326 | { |
| 327 | struct stat st; |
| 328 | |
| 329 | if (bfd_stat (abfd, &st)) |
| 330 | return; |
| 331 | |
| 332 | /* Cache the result so that we do not repeatedly stat this file. */ |
| 333 | *filesizep = st.st_size; |
| 334 | } |
| 335 | |
| 336 | /* Compare the size of the section against the size of the file. |
| 337 | If the section is bigger then the file must be corrupt and |
| 338 | we should not try dumping it. */ |
| 339 | if (sectsize >= *filesizep) |
| 340 | return; |
| 341 | |
| 342 | mem = xmalloc (sectsize); |
| 343 | |
| 344 | if (bfd_get_section_contents (abfd, sect, mem, (file_ptr) 0, sectsize)) |
| 345 | { |
| 346 | got_a_section = TRUE; |
| 347 | |
| 348 | print_strings (filename_and_sizep->filename, NULL, sect->filepos, |
| 349 | 0, sectsize, (char *) mem); |
| 350 | } |
| 351 | |
| 352 | free (mem); |
| 353 | } |
| 354 | |
| 355 | /* Scan all of the sections in FILE, and print the strings |
| 356 | in the initialized data section(s). |
| 357 | |
| 358 | Return TRUE if successful, |
| 359 | FALSE if not (such as if FILE is not an object file). */ |
| 360 | |
| 361 | static bfd_boolean |
| 362 | strings_object_file (const char *file) |
| 363 | { |
| 364 | filename_and_size_t filename_and_size; |
| 365 | bfd *abfd; |
| 366 | |
| 367 | abfd = bfd_openr (file, target); |
| 368 | |
| 369 | if (abfd == NULL) |
| 370 | /* Treat the file as a non-object file. */ |
| 371 | return FALSE; |
| 372 | |
| 373 | /* This call is mainly for its side effect of reading in the sections. |
| 374 | We follow the traditional behavior of `strings' in that we don't |
| 375 | complain if we don't recognize a file to be an object file. */ |
| 376 | if (!bfd_check_format (abfd, bfd_object)) |
| 377 | { |
| 378 | bfd_close (abfd); |
| 379 | return FALSE; |
| 380 | } |
| 381 | |
| 382 | got_a_section = FALSE; |
| 383 | filename_and_size.filename = file; |
| 384 | filename_and_size.filesize = 0; |
| 385 | bfd_map_over_sections (abfd, strings_a_section, & filename_and_size); |
| 386 | |
| 387 | if (!bfd_close (abfd)) |
| 388 | { |
| 389 | bfd_nonfatal (file); |
| 390 | return FALSE; |
| 391 | } |
| 392 | |
| 393 | return got_a_section; |
| 394 | } |
| 395 | |
| 396 | /* Print the strings in FILE. Return TRUE if ok, FALSE if an error occurs. */ |
| 397 | |
| 398 | static bfd_boolean |
| 399 | strings_file (char *file) |
| 400 | { |
| 401 | struct stat st; |
| 402 | |
| 403 | /* get_file_size does not support non-S_ISREG files. */ |
| 404 | |
| 405 | if (stat (file, &st) < 0) |
| 406 | { |
| 407 | if (errno == ENOENT) |
| 408 | non_fatal (_("'%s': No such file"), file); |
| 409 | else |
| 410 | non_fatal (_("Warning: could not locate '%s'. reason: %s"), |
| 411 | file, strerror (errno)); |
| 412 | return FALSE; |
| 413 | } |
| 414 | |
| 415 | /* If we weren't told to scan the whole file, |
| 416 | try to open it as an object file and only look at |
| 417 | initialized data sections. If that fails, fall back to the |
| 418 | whole file. */ |
| 419 | if (!datasection_only || !strings_object_file (file)) |
| 420 | { |
| 421 | FILE *stream; |
| 422 | |
| 423 | stream = fopen (file, FOPEN_RB); |
| 424 | if (stream == NULL) |
| 425 | { |
| 426 | fprintf (stderr, "%s: ", program_name); |
| 427 | perror (file); |
| 428 | return FALSE; |
| 429 | } |
| 430 | |
| 431 | print_strings (file, stream, (file_ptr) 0, 0, 0, (char *) 0); |
| 432 | |
| 433 | if (fclose (stream) == EOF) |
| 434 | { |
| 435 | fprintf (stderr, "%s: ", program_name); |
| 436 | perror (file); |
| 437 | return FALSE; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | return TRUE; |
| 442 | } |
| 443 | \f |
| 444 | /* Read the next character, return EOF if none available. |
| 445 | Assume that STREAM is positioned so that the next byte read |
| 446 | is at address ADDRESS in the file. |
| 447 | |
| 448 | If STREAM is NULL, do not read from it. |
| 449 | The caller can supply a buffer of characters |
| 450 | to be processed before the data in STREAM. |
| 451 | MAGIC is the address of the buffer and |
| 452 | MAGICCOUNT is how many characters are in it. */ |
| 453 | |
| 454 | static long |
| 455 | get_char (FILE *stream, file_ptr *address, int *magiccount, char **magic) |
| 456 | { |
| 457 | int c, i; |
| 458 | long r = EOF; |
| 459 | unsigned char buf[4]; |
| 460 | |
| 461 | for (i = 0; i < encoding_bytes; i++) |
| 462 | { |
| 463 | if (*magiccount) |
| 464 | { |
| 465 | (*magiccount)--; |
| 466 | c = *(*magic)++; |
| 467 | } |
| 468 | else |
| 469 | { |
| 470 | if (stream == NULL) |
| 471 | return EOF; |
| 472 | |
| 473 | /* Only use getc_unlocked if we found a declaration for it. |
| 474 | Otherwise, libc is not thread safe by default, and we |
| 475 | should not use it. */ |
| 476 | |
| 477 | #if defined(HAVE_GETC_UNLOCKED) && HAVE_DECL_GETC_UNLOCKED |
| 478 | c = getc_unlocked (stream); |
| 479 | #else |
| 480 | c = getc (stream); |
| 481 | #endif |
| 482 | if (c == EOF) |
| 483 | return EOF; |
| 484 | } |
| 485 | |
| 486 | (*address)++; |
| 487 | buf[i] = c; |
| 488 | } |
| 489 | |
| 490 | switch (encoding) |
| 491 | { |
| 492 | case 'S': |
| 493 | case 's': |
| 494 | r = buf[0]; |
| 495 | break; |
| 496 | case 'b': |
| 497 | r = (buf[0] << 8) | buf[1]; |
| 498 | break; |
| 499 | case 'l': |
| 500 | r = buf[0] | (buf[1] << 8); |
| 501 | break; |
| 502 | case 'B': |
| 503 | r = ((long) buf[0] << 24) | ((long) buf[1] << 16) | |
| 504 | ((long) buf[2] << 8) | buf[3]; |
| 505 | break; |
| 506 | case 'L': |
| 507 | r = buf[0] | ((long) buf[1] << 8) | ((long) buf[2] << 16) | |
| 508 | ((long) buf[3] << 24); |
| 509 | break; |
| 510 | } |
| 511 | |
| 512 | if (r == EOF) |
| 513 | return 0; |
| 514 | |
| 515 | return r; |
| 516 | } |
| 517 | \f |
| 518 | /* Find the strings in file FILENAME, read from STREAM. |
| 519 | Assume that STREAM is positioned so that the next byte read |
| 520 | is at address ADDRESS in the file. |
| 521 | Stop reading at address STOP_POINT in the file, if nonzero. |
| 522 | |
| 523 | If STREAM is NULL, do not read from it. |
| 524 | The caller can supply a buffer of characters |
| 525 | to be processed before the data in STREAM. |
| 526 | MAGIC is the address of the buffer and |
| 527 | MAGICCOUNT is how many characters are in it. |
| 528 | Those characters come at address ADDRESS and the data in STREAM follow. */ |
| 529 | |
| 530 | static void |
| 531 | print_strings (const char *filename, FILE *stream, file_ptr address, |
| 532 | int stop_point, int magiccount, char *magic) |
| 533 | { |
| 534 | char *buf = (char *) xmalloc (sizeof (char) * (string_min + 1)); |
| 535 | |
| 536 | while (1) |
| 537 | { |
| 538 | file_ptr start; |
| 539 | int i; |
| 540 | long c; |
| 541 | |
| 542 | /* See if the next `string_min' chars are all graphic chars. */ |
| 543 | tryline: |
| 544 | if (stop_point && address >= stop_point) |
| 545 | break; |
| 546 | start = address; |
| 547 | for (i = 0; i < string_min; i++) |
| 548 | { |
| 549 | c = get_char (stream, &address, &magiccount, &magic); |
| 550 | if (c == EOF) |
| 551 | { |
| 552 | free (buf); |
| 553 | return; |
| 554 | } |
| 555 | if (! STRING_ISGRAPHIC (c)) |
| 556 | /* Found a non-graphic. Try again starting with next char. */ |
| 557 | goto tryline; |
| 558 | buf[i] = c; |
| 559 | } |
| 560 | |
| 561 | /* We found a run of `string_min' graphic characters. Print up |
| 562 | to the next non-graphic character. */ |
| 563 | |
| 564 | if (print_filenames) |
| 565 | printf ("%s: ", filename); |
| 566 | if (print_addresses) |
| 567 | switch (address_radix) |
| 568 | { |
| 569 | case 8: |
| 570 | #if __STDC_VERSION__ >= 199901L || (defined(__GNUC__) && __GNUC__ >= 2) |
| 571 | if (sizeof (start) > sizeof (long)) |
| 572 | { |
| 573 | #ifndef __MSVCRT__ |
| 574 | printf ("%7llo ", (unsigned long long) start); |
| 575 | #else |
| 576 | printf ("%7I64o ", (unsigned long long) start); |
| 577 | #endif |
| 578 | } |
| 579 | else |
| 580 | #elif !BFD_HOST_64BIT_LONG |
| 581 | if (start != (unsigned long) start) |
| 582 | printf ("++%7lo ", (unsigned long) start); |
| 583 | else |
| 584 | #endif |
| 585 | printf ("%7lo ", (unsigned long) start); |
| 586 | break; |
| 587 | |
| 588 | case 10: |
| 589 | #if __STDC_VERSION__ >= 199901L || (defined(__GNUC__) && __GNUC__ >= 2) |
| 590 | if (sizeof (start) > sizeof (long)) |
| 591 | { |
| 592 | #ifndef __MSVCRT__ |
| 593 | printf ("%7lld ", (unsigned long long) start); |
| 594 | #else |
| 595 | printf ("%7I64d ", (unsigned long long) start); |
| 596 | #endif |
| 597 | } |
| 598 | else |
| 599 | #elif !BFD_HOST_64BIT_LONG |
| 600 | if (start != (unsigned long) start) |
| 601 | printf ("++%7ld ", (unsigned long) start); |
| 602 | else |
| 603 | #endif |
| 604 | printf ("%7ld ", (long) start); |
| 605 | break; |
| 606 | |
| 607 | case 16: |
| 608 | #if __STDC_VERSION__ >= 199901L || (defined(__GNUC__) && __GNUC__ >= 2) |
| 609 | if (sizeof (start) > sizeof (long)) |
| 610 | { |
| 611 | #ifndef __MSVCRT__ |
| 612 | printf ("%7llx ", (unsigned long long) start); |
| 613 | #else |
| 614 | printf ("%7I64x ", (unsigned long long) start); |
| 615 | #endif |
| 616 | } |
| 617 | else |
| 618 | #elif !BFD_HOST_64BIT_LONG |
| 619 | if (start != (unsigned long) start) |
| 620 | printf ("%lx%8.8lx ", (unsigned long) (start >> 32), |
| 621 | (unsigned long) (start & 0xffffffff)); |
| 622 | else |
| 623 | #endif |
| 624 | printf ("%7lx ", (unsigned long) start); |
| 625 | break; |
| 626 | } |
| 627 | |
| 628 | buf[i] = '\0'; |
| 629 | fputs (buf, stdout); |
| 630 | |
| 631 | while (1) |
| 632 | { |
| 633 | c = get_char (stream, &address, &magiccount, &magic); |
| 634 | if (c == EOF) |
| 635 | break; |
| 636 | if (! STRING_ISGRAPHIC (c)) |
| 637 | break; |
| 638 | putchar (c); |
| 639 | } |
| 640 | |
| 641 | putchar ('\n'); |
| 642 | } |
| 643 | free (buf); |
| 644 | } |
| 645 | \f |
| 646 | static void |
| 647 | usage (FILE *stream, int status) |
| 648 | { |
| 649 | fprintf (stream, _("Usage: %s [option(s)] [file(s)]\n"), program_name); |
| 650 | fprintf (stream, _(" Display printable strings in [file(s)] (stdin by default)\n")); |
| 651 | fprintf (stream, _(" The options are:\n\ |
| 652 | -a - --all Scan the entire file, not just the data section\n\ |
| 653 | -f --print-file-name Print the name of the file before each string\n\ |
| 654 | -n --bytes=[number] Locate & print any NUL-terminated sequence of at\n\ |
| 655 | -<number> least [number] characters (default 4).\n\ |
| 656 | -t --radix={o,d,x} Print the location of the string in base 8, 10 or 16\n\ |
| 657 | -o An alias for --radix=o\n\ |
| 658 | -T --target=<BFDNAME> Specify the binary file format\n\ |
| 659 | -e --encoding={s,S,b,l,B,L} Select character size and endianness:\n\ |
| 660 | s = 7-bit, S = 8-bit, {b,l} = 16-bit, {B,L} = 32-bit\n\ |
| 661 | @<file> Read options from <file>\n\ |
| 662 | -h --help Display this information\n\ |
| 663 | -v -V --version Print the program's version number\n")); |
| 664 | list_supported_targets (program_name, stream); |
| 665 | if (REPORT_BUGS_TO[0] && status == 0) |
| 666 | fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); |
| 667 | exit (status); |
| 668 | } |