1 /* $NetBSD: util.c,v 1.9 2011/02/27 17:33:37 joerg Exp $ */ 2 /* $FreeBSD$ */ 3 /* $OpenBSD: util.c,v 1.39 2010/07/02 22:18:03 tedu Exp $ */ 4 5 /*- 6 * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav 7 * Copyright (C) 2008-2010 Gabor Kovesdan <gabor@FreeBSD.org> 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/stat.h> 36 #include <sys/types.h> 37 38 #include <ctype.h> 39 #include <err.h> 40 #include <errno.h> 41 #include <fnmatch.h> 42 #include <fts.h> 43 #include <libgen.h> 44 #include <stdbool.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 #include <wchar.h> 50 #include <wctype.h> 51 52 #include "fastmatch.h" 53 #include "grep.h" 54 55 static int linesqueued; 56 static int procline(struct str *l, int); 57 58 bool 59 file_matching(const char *fname) 60 { 61 char *fname_base; 62 bool ret; 63 64 ret = finclude ? false : true; 65 fname_base = basename(fname); 66 67 for (unsigned int i = 0; i < fpatterns; ++i) { 68 if (fnmatch(fpattern[i].pat, fname, 0) == 0 || 69 fnmatch(fpattern[i].pat, fname_base, 0) == 0) { 70 if (fpattern[i].mode == EXCL_PAT) 71 return (false); 72 else 73 ret = true; 74 } 75 } 76 return (ret); 77 } 78 79 static inline bool 80 dir_matching(const char *dname) 81 { 82 bool ret; 83 84 ret = dinclude ? false : true; 85 86 for (unsigned int i = 0; i < dpatterns; ++i) { 87 if (dname != NULL && 88 fnmatch(dpattern[i].pat, dname, 0) == 0) { 89 if (dpattern[i].mode == EXCL_PAT) 90 return (false); 91 else 92 ret = true; 93 } 94 } 95 return (ret); 96 } 97 98 /* 99 * Processes a directory when a recursive search is performed with 100 * the -R option. Each appropriate file is passed to procfile(). 101 */ 102 int 103 grep_tree(char **argv) 104 { 105 FTS *fts; 106 FTSENT *p; 107 int c, fts_flags; 108 bool ok; 109 110 c = fts_flags = 0; 111 112 switch(linkbehave) { 113 case LINK_EXPLICIT: 114 fts_flags = FTS_COMFOLLOW; 115 break; 116 case LINK_SKIP: 117 fts_flags = FTS_PHYSICAL; 118 break; 119 default: 120 fts_flags = FTS_LOGICAL; 121 122 } 123 124 fts_flags |= FTS_NOSTAT | FTS_NOCHDIR; 125 126 if (!(fts = fts_open(argv, fts_flags, NULL))) 127 err(2, "fts_open"); 128 while ((p = fts_read(fts)) != NULL) { 129 switch (p->fts_info) { 130 case FTS_DNR: 131 /* FALLTHROUGH */ 132 case FTS_ERR: 133 file_err = true; 134 if(!sflag) 135 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 136 break; 137 case FTS_D: 138 /* FALLTHROUGH */ 139 case FTS_DP: 140 if (dexclude || dinclude) 141 if (!dir_matching(p->fts_name) || 142 !dir_matching(p->fts_path)) 143 fts_set(fts, p, FTS_SKIP); 144 break; 145 case FTS_DC: 146 /* Print a warning for recursive directory loop */ 147 warnx("warning: %s: recursive directory loop", 148 p->fts_path); 149 break; 150 default: 151 /* Check for file exclusion/inclusion */ 152 ok = true; 153 if (fexclude || finclude) 154 ok &= file_matching(p->fts_path); 155 156 if (ok) 157 c += procfile(p->fts_path); 158 break; 159 } 160 } 161 162 fts_close(fts); 163 return (c); 164 } 165 166 /* 167 * Opens a file and processes it. Each file is processed line-by-line 168 * passing the lines to procline(). 169 */ 170 int 171 procfile(const char *fn) 172 { 173 struct file *f; 174 struct stat sb; 175 struct str ln; 176 mode_t s; 177 int c, t; 178 179 mcount = mlimit; 180 181 if (strcmp(fn, "-") == 0) { 182 fn = label != NULL ? label : getstr(1); 183 f = grep_open(NULL); 184 } else { 185 if (!stat(fn, &sb)) { 186 /* Check if we need to process the file */ 187 s = sb.st_mode & S_IFMT; 188 if (s == S_IFDIR && dirbehave == DIR_SKIP) 189 return (0); 190 if ((s == S_IFIFO || s == S_IFCHR || s == S_IFBLK 191 || s == S_IFSOCK) && devbehave == DEV_SKIP) 192 return (0); 193 } 194 f = grep_open(fn); 195 } 196 if (f == NULL) { 197 file_err = true; 198 if (!sflag) 199 warn("%s", fn); 200 return (0); 201 } 202 203 ln.file = grep_malloc(strlen(fn) + 1); 204 strcpy(ln.file, fn); 205 ln.line_no = 0; 206 ln.len = 0; 207 linesqueued = 0; 208 tail = 0; 209 ln.off = -1; 210 211 for (c = 0; c == 0 || !(lflag || qflag); ) { 212 ln.off += ln.len + 1; 213 if ((ln.dat = grep_fgetln(f, &ln.len)) == NULL || ln.len == 0) { 214 if (ln.line_no == 0 && matchall) 215 exit(0); 216 else 217 break; 218 } 219 if (ln.len > 0 && ln.dat[ln.len - 1] == '\n') 220 --ln.len; 221 ln.line_no++; 222 223 /* Return if we need to skip a binary file */ 224 if (f->binary && binbehave == BINFILE_SKIP) { 225 grep_close(f); 226 free(ln.file); 227 free(f); 228 return (0); 229 } 230 /* Process the file line-by-line */ 231 if ((t = procline(&ln, f->binary)) == 0 && Bflag > 0) { 232 enqueue(&ln); 233 linesqueued++; 234 } 235 c += t; 236 if (mflag && mcount <= 0) 237 break; 238 } 239 if (Bflag > 0) 240 clearqueue(); 241 grep_close(f); 242 243 if (cflag) { 244 if (!hflag) 245 printf("%s:", ln.file); 246 printf("%u\n", c); 247 } 248 if (lflag && !qflag && c != 0) 249 printf("%s%c", fn, nullflag ? 0 : '\n'); 250 if (Lflag && !qflag && c == 0) 251 printf("%s%c", fn, nullflag ? 0 : '\n'); 252 if (c && !cflag && !lflag && !Lflag && 253 binbehave == BINFILE_BIN && f->binary && !qflag) 254 printf(getstr(8), fn); 255 256 free(ln.file); 257 free(f); 258 return (c); 259 } 260 261 #define iswword(x) (iswalnum((x)) || (x) == L'_') 262 263 /* 264 * Processes a line comparing it with the specified patterns. Each pattern 265 * is looped to be compared along with the full string, saving each and every 266 * match, which is necessary to colorize the output and to count the 267 * matches. The matching lines are passed to printline() to display the 268 * appropriate output. 269 */ 270 static int 271 procline(struct str *l, int nottext) 272 { 273 regmatch_t matches[MAX_LINE_MATCHES]; 274 regmatch_t pmatch; 275 size_t st = 0; 276 unsigned int i; 277 int c = 0, m = 0, r = 0; 278 279 /* Loop to process the whole line */ 280 while (st <= l->len) { 281 pmatch.rm_so = st; 282 pmatch.rm_eo = l->len; 283 284 /* Loop to compare with all the patterns */ 285 for (i = 0; i < patterns; i++) { 286 if (fg_pattern[i].pattern) 287 r = fastexec(&fg_pattern[i], 288 l->dat, 1, &pmatch, eflags); 289 else 290 r = regexec(&r_pattern[i], l->dat, 1, 291 &pmatch, eflags); 292 r = (r == 0) ? 0 : REG_NOMATCH; 293 st = (cflags & REG_NOSUB) 294 ? (size_t)l->len 295 : (size_t)pmatch.rm_eo; 296 if (r == REG_NOMATCH) 297 continue; 298 /* Check for full match */ 299 if (r == 0 && xflag) 300 if (pmatch.rm_so != 0 || 301 (size_t)pmatch.rm_eo != l->len) 302 r = REG_NOMATCH; 303 /* Check for whole word match */ 304 if (r == 0 && (wflag || fg_pattern[i].word)) { 305 wchar_t wbegin, wend; 306 307 wbegin = wend = L' '; 308 if (pmatch.rm_so != 0 && 309 sscanf(&l->dat[pmatch.rm_so - 1], 310 "%lc", &wbegin) != 1) 311 r = REG_NOMATCH; 312 else if ((size_t)pmatch.rm_eo != 313 l->len && 314 sscanf(&l->dat[pmatch.rm_eo], 315 "%lc", &wend) != 1) 316 r = REG_NOMATCH; 317 else if (iswword(wbegin) || 318 iswword(wend)) 319 r = REG_NOMATCH; 320 } 321 if (r == 0) { 322 if (m == 0) 323 c++; 324 if (m < MAX_LINE_MATCHES) 325 matches[m++] = pmatch; 326 /* matches - skip further patterns */ 327 if ((color == NULL && !oflag) || 328 qflag || lflag) 329 break; 330 } 331 } 332 333 if (vflag) { 334 c = !c; 335 break; 336 } 337 338 /* One pass if we are not recording matches */ 339 if (!wflag && ((color == NULL && !oflag) || qflag || lflag || Lflag)) 340 break; 341 342 if (st == (size_t)pmatch.rm_so) 343 break; /* No matches */ 344 } 345 346 347 /* Count the matches if we have a match limit */ 348 if (mflag) 349 mcount -= c; 350 351 if (c && binbehave == BINFILE_BIN && nottext) 352 return (c); /* Binary file */ 353 354 /* Dealing with the context */ 355 if ((tail || c) && !cflag && !qflag && !lflag && !Lflag) { 356 if (c) { 357 if (!first && !prev && !tail && Aflag) 358 printf("--\n"); 359 tail = Aflag; 360 if (Bflag > 0) { 361 if (!first && !prev) 362 printf("--\n"); 363 printqueue(); 364 } 365 linesqueued = 0; 366 printline(l, ':', matches, m); 367 } else { 368 printline(l, '-', matches, m); 369 tail--; 370 } 371 } 372 373 if (c) { 374 prev = true; 375 first = false; 376 } else 377 prev = false; 378 379 return (c); 380 } 381 382 /* 383 * Safe malloc() for internal use. 384 */ 385 void * 386 grep_malloc(size_t size) 387 { 388 void *ptr; 389 390 if ((ptr = malloc(size)) == NULL) 391 err(2, "malloc"); 392 return (ptr); 393 } 394 395 /* 396 * Safe calloc() for internal use. 397 */ 398 void * 399 grep_calloc(size_t nmemb, size_t size) 400 { 401 void *ptr; 402 403 if ((ptr = calloc(nmemb, size)) == NULL) 404 err(2, "calloc"); 405 return (ptr); 406 } 407 408 /* 409 * Safe realloc() for internal use. 410 */ 411 void * 412 grep_realloc(void *ptr, size_t size) 413 { 414 415 if ((ptr = realloc(ptr, size)) == NULL) 416 err(2, "realloc"); 417 return (ptr); 418 } 419 420 /* 421 * Safe strdup() for internal use. 422 */ 423 char * 424 grep_strdup(const char *str) 425 { 426 char *ret; 427 428 if ((ret = strdup(str)) == NULL) 429 err(2, "strdup"); 430 return (ret); 431 } 432 433 /* 434 * Prints a matching line according to the command line options. 435 */ 436 void 437 printline(struct str *line, int sep, regmatch_t *matches, int m) 438 { 439 size_t a = 0; 440 int i, n = 0; 441 442 if (!hflag) { 443 if (!nullflag) { 444 fputs(line->file, stdout); 445 ++n; 446 } else { 447 printf("%s", line->file); 448 putchar(0); 449 } 450 } 451 if (nflag) { 452 if (n > 0) 453 putchar(sep); 454 printf("%d", line->line_no); 455 ++n; 456 } 457 if (bflag) { 458 if (n > 0) 459 putchar(sep); 460 printf("%lld", (long long)line->off); 461 ++n; 462 } 463 if (n) 464 putchar(sep); 465 /* --color and -o */ 466 if ((oflag || color) && m > 0) { 467 for (i = 0; i < m; i++) { 468 if (!oflag) 469 fwrite(line->dat + a, matches[i].rm_so - a, 1, 470 stdout); 471 if (color) 472 fprintf(stdout, "\33[%sm\33[K", color); 473 474 fwrite(line->dat + matches[i].rm_so, 475 matches[i].rm_eo - matches[i].rm_so, 1, 476 stdout); 477 if (color) 478 fprintf(stdout, "\33[m\33[K"); 479 a = matches[i].rm_eo; 480 if (oflag) 481 putchar('\n'); 482 } 483 if (!oflag) { 484 if (line->len - a > 0) 485 fwrite(line->dat + a, line->len - a, 1, stdout); 486 putchar('\n'); 487 } 488 } else { 489 fwrite(line->dat, line->len, 1, stdout); 490 putchar('\n'); 491 } 492 } 493