1 /* $NetBSD: grep.c,v 1.6 2011/04/18 03:48:23 joerg Exp $ */ 2 /* $FreeBSD$ */ 3 /* $OpenBSD: grep.c,v 1.42 2010/07/02 22:18:03 tedu Exp $ */ 4 5 /*- 6 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 7 * 8 * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav 9 * Copyright (C) 2008-2009 Gabor Kovesdan <gabor@FreeBSD.org> 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <sys/stat.h> 38 #include <sys/types.h> 39 40 #include <ctype.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <getopt.h> 45 #include <limits.h> 46 #include <libgen.h> 47 #include <locale.h> 48 #include <stdbool.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 #include "grep.h" 55 56 const char *errstr[] = { 57 "", 58 /* 1*/ "(standard input)", 59 /* 2*/ "unknown %s option", 60 /* 3*/ "usage: %s [-abcDEFGHhIiLlmnOoPqRSsUVvwxz] [-A num] [-B num] [-C[num]]\n", 61 /* 4*/ "\t[-e pattern] [-f file] [--binary-files=value] [--color=when]\n", 62 /* 5*/ "\t[--context[=num]] [--directories=action] [--label] [--line-buffered]\n", 63 /* 6*/ "\t[--null] [pattern] [file ...]\n", 64 /* 7*/ "Binary file %s matches\n", 65 /* 8*/ "%s (BSD grep) %s\n", 66 /* 9*/ "%s (BSD grep, GNU compatible) %s\n", 67 }; 68 69 /* Flags passed to regcomp() and regexec() */ 70 int cflags = REG_NOSUB | REG_NEWLINE; 71 int eflags = REG_STARTEND; 72 73 /* XXX TODO: Get rid of this flag. 74 * matchall is a gross hack that means that an empty pattern was passed to us. 75 * It is a necessary evil at the moment because our regex(3) implementation 76 * does not allow for empty patterns, as supported by POSIX's definition of 77 * grammar for BREs/EREs. When libregex becomes available, it would be wise 78 * to remove this and let regex(3) handle the dirty details of empty patterns. 79 */ 80 bool matchall; 81 82 /* Searching patterns */ 83 unsigned int patterns; 84 static unsigned int pattern_sz; 85 struct pat *pattern; 86 regex_t *r_pattern; 87 88 /* Filename exclusion/inclusion patterns */ 89 unsigned int fpatterns, dpatterns; 90 static unsigned int fpattern_sz, dpattern_sz; 91 struct epat *dpattern, *fpattern; 92 93 /* For regex errors */ 94 char re_error[RE_ERROR_BUF + 1]; 95 96 /* Command-line flags */ 97 long long Aflag; /* -A x: print x lines trailing each match */ 98 long long Bflag; /* -B x: print x lines leading each match */ 99 bool Hflag; /* -H: always print file name */ 100 bool Lflag; /* -L: only show names of files with no matches */ 101 bool bflag; /* -b: show block numbers for each match */ 102 bool cflag; /* -c: only show a count of matching lines */ 103 bool hflag; /* -h: don't print filename headers */ 104 bool iflag; /* -i: ignore case */ 105 bool lflag; /* -l: only show names of files with matches */ 106 bool mflag; /* -m x: stop reading the files after x matches */ 107 long long mcount; /* count for -m */ 108 long long mlimit; /* requested value for -m */ 109 char fileeol; /* indicator for eol */ 110 bool nflag; /* -n: show line numbers in front of matching lines */ 111 bool oflag; /* -o: print only matching part */ 112 bool qflag; /* -q: quiet mode (don't output anything) */ 113 bool sflag; /* -s: silent mode (ignore errors) */ 114 bool vflag; /* -v: only show non-matching lines */ 115 bool wflag; /* -w: pattern must start and end on word boundaries */ 116 bool xflag; /* -x: pattern must match entire line */ 117 bool lbflag; /* --line-buffered */ 118 bool nullflag; /* --null */ 119 char *label; /* --label */ 120 const char *color; /* --color */ 121 int grepbehave = GREP_BASIC; /* -EFGP: type of the regex */ 122 int binbehave = BINFILE_BIN; /* -aIU: handling of binary files */ 123 int filebehave = FILE_STDIO; 124 int devbehave = DEV_READ; /* -D: handling of devices */ 125 int dirbehave = DIR_READ; /* -dRr: handling of directories */ 126 int linkbehave = LINK_READ; /* -OpS: handling of symlinks */ 127 128 bool dexclude, dinclude; /* --exclude-dir and --include-dir */ 129 bool fexclude, finclude; /* --exclude and --include */ 130 131 enum { 132 BIN_OPT = CHAR_MAX + 1, 133 COLOR_OPT, 134 HELP_OPT, 135 MMAP_OPT, 136 LINEBUF_OPT, 137 LABEL_OPT, 138 NULL_OPT, 139 R_EXCLUDE_OPT, 140 R_INCLUDE_OPT, 141 R_DEXCLUDE_OPT, 142 R_DINCLUDE_OPT 143 }; 144 145 static inline const char *init_color(const char *); 146 147 /* Housekeeping */ 148 bool file_err; /* file reading error */ 149 150 /* 151 * Prints usage information and returns 2. 152 */ 153 static void 154 usage(void) 155 { 156 fprintf(stderr, errstr[3], getprogname()); 157 fprintf(stderr, "%s", errstr[4]); 158 fprintf(stderr, "%s", errstr[5]); 159 fprintf(stderr, "%s", errstr[6]); 160 exit(2); 161 } 162 163 static const char *optstr = "0123456789A:B:C:D:EFGHILOPSRUVabcd:e:f:hilm:nopqrsuvwxyz"; 164 165 static const struct option long_options[] = 166 { 167 {"binary-files", required_argument, NULL, BIN_OPT}, 168 {"help", no_argument, NULL, HELP_OPT}, 169 {"mmap", no_argument, NULL, MMAP_OPT}, 170 {"line-buffered", no_argument, NULL, LINEBUF_OPT}, 171 {"label", required_argument, NULL, LABEL_OPT}, 172 {"null", no_argument, NULL, NULL_OPT}, 173 {"color", optional_argument, NULL, COLOR_OPT}, 174 {"colour", optional_argument, NULL, COLOR_OPT}, 175 {"exclude", required_argument, NULL, R_EXCLUDE_OPT}, 176 {"include", required_argument, NULL, R_INCLUDE_OPT}, 177 {"exclude-dir", required_argument, NULL, R_DEXCLUDE_OPT}, 178 {"include-dir", required_argument, NULL, R_DINCLUDE_OPT}, 179 {"after-context", required_argument, NULL, 'A'}, 180 {"text", no_argument, NULL, 'a'}, 181 {"before-context", required_argument, NULL, 'B'}, 182 {"byte-offset", no_argument, NULL, 'b'}, 183 {"context", optional_argument, NULL, 'C'}, 184 {"count", no_argument, NULL, 'c'}, 185 {"devices", required_argument, NULL, 'D'}, 186 {"directories", required_argument, NULL, 'd'}, 187 {"extended-regexp", no_argument, NULL, 'E'}, 188 {"regexp", required_argument, NULL, 'e'}, 189 {"fixed-strings", no_argument, NULL, 'F'}, 190 {"file", required_argument, NULL, 'f'}, 191 {"basic-regexp", no_argument, NULL, 'G'}, 192 {"no-filename", no_argument, NULL, 'h'}, 193 {"with-filename", no_argument, NULL, 'H'}, 194 {"ignore-case", no_argument, NULL, 'i'}, 195 {"files-with-matches", no_argument, NULL, 'l'}, 196 {"files-without-match", no_argument, NULL, 'L'}, 197 {"max-count", required_argument, NULL, 'm'}, 198 {"line-number", no_argument, NULL, 'n'}, 199 {"only-matching", no_argument, NULL, 'o'}, 200 {"quiet", no_argument, NULL, 'q'}, 201 {"silent", no_argument, NULL, 'q'}, 202 {"recursive", no_argument, NULL, 'r'}, 203 {"no-messages", no_argument, NULL, 's'}, 204 {"binary", no_argument, NULL, 'U'}, 205 {"unix-byte-offsets", no_argument, NULL, 'u'}, 206 {"invert-match", no_argument, NULL, 'v'}, 207 {"version", no_argument, NULL, 'V'}, 208 {"word-regexp", no_argument, NULL, 'w'}, 209 {"line-regexp", no_argument, NULL, 'x'}, 210 {"null-data", no_argument, NULL, 'z'}, 211 {NULL, no_argument, NULL, 0} 212 }; 213 214 /* 215 * Adds a searching pattern to the internal array. 216 */ 217 static void 218 add_pattern(char *pat, size_t len) 219 { 220 221 /* Check if we can do a shortcut */ 222 if (len == 0) { 223 matchall = true; 224 return; 225 } 226 /* Increase size if necessary */ 227 if (patterns == pattern_sz) { 228 pattern_sz *= 2; 229 pattern = grep_realloc(pattern, ++pattern_sz * 230 sizeof(struct pat)); 231 } 232 if (len > 0 && pat[len - 1] == '\n') 233 --len; 234 /* pat may not be NUL-terminated */ 235 pattern[patterns].pat = grep_malloc(len + 1); 236 memcpy(pattern[patterns].pat, pat, len); 237 pattern[patterns].len = len; 238 pattern[patterns].pat[len] = '\0'; 239 ++patterns; 240 } 241 242 /* 243 * Adds a file include/exclude pattern to the internal array. 244 */ 245 static void 246 add_fpattern(const char *pat, int mode) 247 { 248 249 /* Increase size if necessary */ 250 if (fpatterns == fpattern_sz) { 251 fpattern_sz *= 2; 252 fpattern = grep_realloc(fpattern, ++fpattern_sz * 253 sizeof(struct epat)); 254 } 255 fpattern[fpatterns].pat = grep_strdup(pat); 256 fpattern[fpatterns].mode = mode; 257 ++fpatterns; 258 } 259 260 /* 261 * Adds a directory include/exclude pattern to the internal array. 262 */ 263 static void 264 add_dpattern(const char *pat, int mode) 265 { 266 267 /* Increase size if necessary */ 268 if (dpatterns == dpattern_sz) { 269 dpattern_sz *= 2; 270 dpattern = grep_realloc(dpattern, ++dpattern_sz * 271 sizeof(struct epat)); 272 } 273 dpattern[dpatterns].pat = grep_strdup(pat); 274 dpattern[dpatterns].mode = mode; 275 ++dpatterns; 276 } 277 278 /* 279 * Reads searching patterns from a file and adds them with add_pattern(). 280 */ 281 static void 282 read_patterns(const char *fn) 283 { 284 struct stat st; 285 FILE *f; 286 char *line; 287 size_t len; 288 ssize_t rlen; 289 290 if (strcmp(fn, "-") == 0) 291 f = stdin; 292 else if ((f = fopen(fn, "r")) == NULL) 293 err(2, "%s", fn); 294 if ((fstat(fileno(f), &st) == -1) || (S_ISDIR(st.st_mode))) { 295 fclose(f); 296 return; 297 } 298 len = 0; 299 line = NULL; 300 while ((rlen = getline(&line, &len, f)) != -1) { 301 if (line[0] == '\0') 302 continue; 303 add_pattern(line, line[0] == '\n' ? 0 : (size_t)rlen); 304 } 305 306 free(line); 307 if (ferror(f)) 308 err(2, "%s", fn); 309 if (strcmp(fn, "-") != 0) 310 fclose(f); 311 } 312 313 static inline const char * 314 init_color(const char *d) 315 { 316 char *c; 317 318 c = getenv("GREP_COLOR"); 319 return (c != NULL && c[0] != '\0' ? c : d); 320 } 321 322 int 323 main(int argc, char *argv[]) 324 { 325 char **aargv, **eargv, *eopts; 326 char *ep; 327 const char *pn; 328 long long l; 329 unsigned int aargc, eargc, i; 330 int c, lastc, needpattern, newarg, prevoptind; 331 bool matched; 332 333 setlocale(LC_ALL, ""); 334 335 /* 336 * Check how we've bene invoked to determine the behavior we should 337 * exhibit. In this way we can have all the functionalities in one 338 * binary without the need of scripting and using ugly hacks. 339 */ 340 pn = getprogname(); 341 switch (pn[0]) { 342 case 'e': 343 grepbehave = GREP_EXTENDED; 344 break; 345 case 'f': 346 grepbehave = GREP_FIXED; 347 break; 348 case 'r': 349 dirbehave = DIR_RECURSE; 350 Hflag = true; 351 break; 352 } 353 354 lastc = '\0'; 355 newarg = 1; 356 prevoptind = 1; 357 needpattern = 1; 358 fileeol = '\n'; 359 360 eopts = getenv("GREP_OPTIONS"); 361 362 /* support for extra arguments in GREP_OPTIONS */ 363 eargc = 0; 364 if (eopts != NULL && eopts[0] != '\0') { 365 char *str; 366 367 /* make an estimation of how many extra arguments we have */ 368 for (unsigned int j = 0; j < strlen(eopts); j++) 369 if (eopts[j] == ' ') 370 eargc++; 371 372 eargv = (char **)grep_malloc(sizeof(char *) * (eargc + 1)); 373 374 eargc = 0; 375 /* parse extra arguments */ 376 while ((str = strsep(&eopts, " ")) != NULL) 377 if (str[0] != '\0') 378 eargv[eargc++] = grep_strdup(str); 379 380 aargv = (char **)grep_calloc(eargc + argc + 1, 381 sizeof(char *)); 382 383 aargv[0] = argv[0]; 384 for (i = 0; i < eargc; i++) 385 aargv[i + 1] = eargv[i]; 386 for (int j = 1; j < argc; j++, i++) 387 aargv[i + 1] = argv[j]; 388 389 aargc = eargc + argc; 390 } else { 391 aargv = argv; 392 aargc = argc; 393 } 394 395 while (((c = getopt_long(aargc, aargv, optstr, long_options, NULL)) != 396 -1)) { 397 switch (c) { 398 case '0': case '1': case '2': case '3': case '4': 399 case '5': case '6': case '7': case '8': case '9': 400 if (newarg || !isdigit(lastc)) 401 Aflag = 0; 402 else if (Aflag > LLONG_MAX / 10 - 1) { 403 errno = ERANGE; 404 err(2, NULL); 405 } 406 407 Aflag = Bflag = (Aflag * 10) + (c - '0'); 408 break; 409 case 'C': 410 if (optarg == NULL) { 411 Aflag = Bflag = 2; 412 break; 413 } 414 /* FALLTHROUGH */ 415 case 'A': 416 /* FALLTHROUGH */ 417 case 'B': 418 errno = 0; 419 l = strtoll(optarg, &ep, 10); 420 if (errno == ERANGE || errno == EINVAL) 421 err(2, NULL); 422 else if (ep[0] != '\0') { 423 errno = EINVAL; 424 err(2, NULL); 425 } else if (l < 0) { 426 errno = EINVAL; 427 err(2, "context argument must be non-negative"); 428 } 429 430 if (c == 'A') 431 Aflag = l; 432 else if (c == 'B') 433 Bflag = l; 434 else 435 Aflag = Bflag = l; 436 break; 437 case 'a': 438 binbehave = BINFILE_TEXT; 439 break; 440 case 'b': 441 bflag = true; 442 break; 443 case 'c': 444 cflag = true; 445 break; 446 case 'D': 447 if (strcasecmp(optarg, "skip") == 0) 448 devbehave = DEV_SKIP; 449 else if (strcasecmp(optarg, "read") == 0) 450 devbehave = DEV_READ; 451 else 452 errx(2, errstr[2], "--devices"); 453 break; 454 case 'd': 455 if (strcasecmp("recurse", optarg) == 0) { 456 Hflag = true; 457 dirbehave = DIR_RECURSE; 458 } else if (strcasecmp("skip", optarg) == 0) 459 dirbehave = DIR_SKIP; 460 else if (strcasecmp("read", optarg) == 0) 461 dirbehave = DIR_READ; 462 else 463 errx(2, errstr[2], "--directories"); 464 break; 465 case 'E': 466 grepbehave = GREP_EXTENDED; 467 break; 468 case 'e': 469 { 470 char *token; 471 char *string = optarg; 472 473 while ((token = strsep(&string, "\n")) != NULL) 474 add_pattern(token, strlen(token)); 475 } 476 needpattern = 0; 477 break; 478 case 'F': 479 grepbehave = GREP_FIXED; 480 break; 481 case 'f': 482 read_patterns(optarg); 483 needpattern = 0; 484 break; 485 case 'G': 486 grepbehave = GREP_BASIC; 487 break; 488 case 'H': 489 Hflag = true; 490 break; 491 case 'h': 492 Hflag = false; 493 hflag = true; 494 break; 495 case 'I': 496 binbehave = BINFILE_SKIP; 497 break; 498 case 'i': 499 case 'y': 500 iflag = true; 501 cflags |= REG_ICASE; 502 break; 503 case 'L': 504 lflag = false; 505 Lflag = true; 506 break; 507 case 'l': 508 Lflag = false; 509 lflag = true; 510 break; 511 case 'm': 512 mflag = true; 513 errno = 0; 514 mlimit = mcount = strtoll(optarg, &ep, 10); 515 if (((errno == ERANGE) && (mcount == LLONG_MAX)) || 516 ((errno == EINVAL) && (mcount == 0))) 517 err(2, NULL); 518 else if (ep[0] != '\0') { 519 errno = EINVAL; 520 err(2, NULL); 521 } 522 break; 523 case 'n': 524 nflag = true; 525 break; 526 case 'O': 527 linkbehave = LINK_EXPLICIT; 528 break; 529 case 'o': 530 oflag = true; 531 cflags &= ~REG_NOSUB; 532 break; 533 case 'p': 534 linkbehave = LINK_SKIP; 535 break; 536 case 'q': 537 qflag = true; 538 break; 539 case 'S': 540 linkbehave = LINK_READ; 541 break; 542 case 'R': 543 case 'r': 544 dirbehave = DIR_RECURSE; 545 Hflag = true; 546 break; 547 case 's': 548 sflag = true; 549 break; 550 case 'U': 551 binbehave = BINFILE_BIN; 552 break; 553 case 'u': 554 case MMAP_OPT: 555 filebehave = FILE_MMAP; 556 break; 557 case 'V': 558 #ifdef WITH_GNU 559 printf(errstr[9], getprogname(), VERSION); 560 #else 561 printf(errstr[8], getprogname(), VERSION); 562 #endif 563 exit(0); 564 case 'v': 565 vflag = true; 566 break; 567 case 'w': 568 wflag = true; 569 cflags &= ~REG_NOSUB; 570 break; 571 case 'x': 572 xflag = true; 573 cflags &= ~REG_NOSUB; 574 break; 575 case 'z': 576 fileeol = '\0'; 577 break; 578 case BIN_OPT: 579 if (strcasecmp("binary", optarg) == 0) 580 binbehave = BINFILE_BIN; 581 else if (strcasecmp("without-match", optarg) == 0) 582 binbehave = BINFILE_SKIP; 583 else if (strcasecmp("text", optarg) == 0) 584 binbehave = BINFILE_TEXT; 585 else 586 errx(2, errstr[2], "--binary-files"); 587 break; 588 case COLOR_OPT: 589 color = NULL; 590 if (optarg == NULL || strcasecmp("auto", optarg) == 0 || 591 strcasecmp("tty", optarg) == 0 || 592 strcasecmp("if-tty", optarg) == 0) { 593 char *term; 594 595 term = getenv("TERM"); 596 if (isatty(STDOUT_FILENO) && term != NULL && 597 strcasecmp(term, "dumb") != 0) 598 color = init_color("01;31"); 599 } else if (strcasecmp("always", optarg) == 0 || 600 strcasecmp("yes", optarg) == 0 || 601 strcasecmp("force", optarg) == 0) { 602 color = init_color("01;31"); 603 } else if (strcasecmp("never", optarg) != 0 && 604 strcasecmp("none", optarg) != 0 && 605 strcasecmp("no", optarg) != 0) 606 errx(2, errstr[2], "--color"); 607 cflags &= ~REG_NOSUB; 608 break; 609 case LABEL_OPT: 610 label = optarg; 611 break; 612 case LINEBUF_OPT: 613 lbflag = true; 614 break; 615 case NULL_OPT: 616 nullflag = true; 617 break; 618 case R_INCLUDE_OPT: 619 finclude = true; 620 add_fpattern(optarg, INCL_PAT); 621 break; 622 case R_EXCLUDE_OPT: 623 fexclude = true; 624 add_fpattern(optarg, EXCL_PAT); 625 break; 626 case R_DINCLUDE_OPT: 627 dinclude = true; 628 add_dpattern(optarg, INCL_PAT); 629 break; 630 case R_DEXCLUDE_OPT: 631 dexclude = true; 632 add_dpattern(optarg, EXCL_PAT); 633 break; 634 case HELP_OPT: 635 default: 636 usage(); 637 } 638 lastc = c; 639 newarg = optind != prevoptind; 640 prevoptind = optind; 641 } 642 aargc -= optind; 643 aargv += optind; 644 645 /* Empty pattern file matches nothing */ 646 if (!needpattern && (patterns == 0) && !matchall) 647 exit(1); 648 649 /* Fail if we don't have any pattern */ 650 if (aargc == 0 && needpattern) 651 usage(); 652 653 /* Process patterns from command line */ 654 if (aargc != 0 && needpattern) { 655 char *token; 656 char *string = *aargv; 657 658 while ((token = strsep(&string, "\n")) != NULL) 659 add_pattern(token, strlen(token)); 660 --aargc; 661 ++aargv; 662 } 663 664 switch (grepbehave) { 665 case GREP_BASIC: 666 break; 667 case GREP_FIXED: 668 /* 669 * regex(3) implementations that support fixed-string searches generally 670 * define either REG_NOSPEC or REG_LITERAL. Set the appropriate flag 671 * here. If neither are defined, GREP_FIXED later implies that the 672 * internal literal matcher should be used. Other cflags that have 673 * the same interpretation as REG_NOSPEC and REG_LITERAL should be 674 * similarly added here, and grep.h should be amended to take this into 675 * consideration when defining WITH_INTERNAL_NOSPEC. 676 */ 677 #if defined(REG_NOSPEC) 678 cflags |= REG_NOSPEC; 679 #elif defined(REG_LITERAL) 680 cflags |= REG_LITERAL; 681 #endif 682 break; 683 case GREP_EXTENDED: 684 cflags |= REG_EXTENDED; 685 break; 686 default: 687 /* NOTREACHED */ 688 usage(); 689 } 690 691 r_pattern = grep_calloc(patterns, sizeof(*r_pattern)); 692 693 #ifdef WITH_INTERNAL_NOSPEC 694 if (grepbehave != GREP_FIXED) { 695 #else 696 { 697 #endif 698 /* Check if cheating is allowed (always is for fgrep). */ 699 for (i = 0; i < patterns; ++i) { 700 c = regcomp(&r_pattern[i], pattern[i].pat, cflags); 701 if (c != 0) { 702 regerror(c, &r_pattern[i], re_error, 703 RE_ERROR_BUF); 704 errx(2, "%s", re_error); 705 } 706 } 707 } 708 709 if (lbflag) 710 setlinebuf(stdout); 711 712 if ((aargc == 0 || aargc == 1) && !Hflag) 713 hflag = true; 714 715 if (aargc == 0 && dirbehave != DIR_RECURSE) 716 exit(!procfile("-")); 717 718 if (dirbehave == DIR_RECURSE) 719 matched = grep_tree(aargv); 720 else 721 for (matched = false; aargc--; ++aargv) { 722 if ((finclude || fexclude) && !file_matching(*aargv)) 723 continue; 724 if (procfile(*aargv)) 725 matched = true; 726 } 727 728 if (Lflag) 729 matched = !matched; 730 731 /* 732 * Calculate the correct return value according to the 733 * results and the command line option. 734 */ 735 exit(matched ? (file_err ? (qflag ? 0 : 2) : 0) : (file_err ? 2 : 1)); 736 } 737