usr.bin/whereis/whereis.c

   1 /*
   2  * Copyright © 2002, Jörg Wunsch
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  16  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
  17  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  19  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  21  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  22  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  23  * POSSIBILITY OF SUCH DAMAGE.
  24  * $FreeBSD: src/usr.bin/whereis/whereis.c,v 1.12 2002/08/22 01:50:51 johan Exp $
  25  * $DragonFly: src/usr.bin/whereis/whereis.c,v 1.5 2006/07/01 19:34:43 swildner Exp $
  26  */
  27
  28 /*
  29  * 4.3BSD UI-compatible whereis(1) utility.  Rewritten from scratch
  30  * since the original 4.3BSD version suffers legal problems that
  31  * prevent it from being redistributed, and since the 4.4BSD version
  32  * was pretty inferior in functionality.
  33  */
  34
  35 #include <sys/types.h>
  36
  37
  38 #include <sys/stat.h>
  39 #include <sys/sysctl.h>
  40
  41 #include <dirent.h>
  42 #include <err.h>
  43 #include <errno.h>
  44 #include <locale.h>
  45 #include <regex.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <sysexits.h>
  50 #include <unistd.h>
  51
  52 #include "pathnames.h"
  53
  54 #define NO_BIN_FOUND    1
  55 #define NO_MAN_FOUND    2
  56 #define NO_SRC_FOUND    4
  57
  58 typedef const char *ccharp;
  59
  60 int opt_a, opt_b, opt_m, opt_q, opt_s, opt_u, opt_x;
  61 ccharp *bindirs, *mandirs, *sourcedirs;
  62 char **query;
  63
  64 const char *sourcepath = PATH_SOURCES;
  65
  66 char    *colonify(ccharp *);
  67 int      contains(ccharp *, const char *);
  68 void     decolonify(char *, ccharp **, int *);
  69 void     defaults(void);
  70 void     scanopts(int, char **);
  71 void     usage(void);
  72
  73 /*
  74  * Throughout this program, a number of strings are dynamically
  75  * allocated but never freed.  Their memory is written to when
  76  * splitting the strings into string lists which will later be
  77  * processed.  Since it's important that those string lists remain
  78  * valid even after the functions allocating the memory returned,
  79  * those functions cannot free them.  They could be freed only at end
  80  * of main(), which is pretty pointless anyway.
  81  *
  82  * The overall amount of memory to be allocated for processing the
  83  * strings is not expected to exceed a few kilobytes.  For that
  84  * reason, allocation can usually always be assumed to succeed (within
  85  * a virtual memory environment), thus we simply bail out using
  86  * abort(3) in case of an allocation failure.
  87  */
  88
  89 void
  90 usage(void)
  91 {
  92         errx(EX_USAGE,
  93              "usage: whereis [-abmqsux] [-BMS dir... -f] name ...");
  94 }
  95
  96 /*
  97  * Scan options passed to program.
  98  *
  99  * Note that the -B/-M/-S options expect a list of directory
 100  * names that must be terminated with -f.
 101  */
 102 void
 103 scanopts(int argc, char **argv)
 104 {
 105         int c, i;
 106         ccharp **dirlist;
 107
 108         while ((c = getopt(argc, argv, "BMSabfmqsux")) != -1)
 109                 switch (c) {
 110                 case 'B':
 111                         dirlist = &bindirs;
 112                         goto dolist;
 113
 114                 case 'M':
 115                         dirlist = &mandirs;
 116                         goto dolist;
 117
 118                 case 'S':
 119                         dirlist = &sourcedirs;
 120                   dolist:
 121                         i = 0;
 122                         *dirlist = realloc(*dirlist, (i + 1) * sizeof(char *));
 123                         (*dirlist)[i] = NULL;
 124                         while (optind < argc &&
 125                                strcmp(argv[optind], "-f") != 0 &&
 126                                strcmp(argv[optind], "-B") != 0 &&
 127                                strcmp(argv[optind], "-M") != 0 &&
 128                                strcmp(argv[optind], "-S") != 0) {
 129                                 decolonify(argv[optind], dirlist, &i);
 130                                 optind++;
 131                         }
 132                         break;
 133
 134                 case 'a':
 135                         opt_a = 1;
 136                         break;
 137
 138                 case 'b':
 139                         opt_b = 1;
 140                         break;
 141
 142                 case 'f':
 143                         goto breakout;
 144
 145                 case 'm':
 146                         opt_m = 1;
 147                         break;
 148
 149                 case 'q':
 150                         opt_q = 1;
 151                         break;
 152
 153                 case 's':
 154                         opt_s = 1;
 155                         break;
 156
 157                 case 'u':
 158                         opt_u = 1;
 159                         break;
 160
 161                 case 'x':
 162                         opt_x = 1;
 163                         break;
 164
 165                 default:
 166                         usage();
 167                 }
 168   breakout:
 169         if (optind == argc)
 170                 usage();
 171         query = argv + optind;
 172 }
 173
 174 /*
 175  * Find out whether string `s' is contained in list `cpp'.
 176  */
 177 int
 178 contains(ccharp *cpp, const char *s)
 179 {
 180         ccharp cp;
 181
 182         if (cpp == NULL)
 183                 return (0);
 184
 185         while ((cp = *cpp) != NULL) {
 186                 if (strcmp(cp, s) == 0)
 187                         return (1);
 188                 cpp++;
 189         }
 190         return (0);
 191 }
 192
 193 /*
 194  * Split string `s' at colons, and pass it to the string list pointed
 195  * to by `cppp' (which has `*ip' elements).  Note that the original
 196  * string is modified by replacing the colon with a NUL byte.  The
 197  * partial string is only added if it has a length greater than 0, and
 198  * if it's not already contained in the string list.
 199  */
 200 void
 201 decolonify(char *s, ccharp **cppp, int *ip)
 202 {
 203         char *cp;
 204
 205         while ((cp = strchr(s, ':')), *s != '\0') {
 206                 if (cp)
 207                         *cp = '\0';
 208                 if (strlen(s) && !contains(*cppp, s)) {
 209                         *cppp = realloc(*cppp, (*ip + 2) * sizeof(char *));
 210                         if (cppp == NULL)
 211                                 abort();
 212                         (*cppp)[*ip] = s;
 213                         (*cppp)[*ip + 1] = NULL;
 214                         (*ip)++;
 215                 }
 216                 if (cp)
 217                         s = cp + 1;
 218                 else
 219                         break;
 220         }
 221 }
 222
 223 /*
 224  * Join string list `cpp' into a colon-separated string.
 225  */
 226 char *
 227 colonify(ccharp *cpp)
 228 {
 229         size_t s;
 230         char *cp;
 231         int i;
 232
 233         if (cpp == NULL)
 234                 return (0);
 235
 236         for (s = 0, i = 0; cpp[i] != NULL; i++)
 237                 s += strlen(cpp[i]) + 1;
 238         if ((cp = malloc(s + 1)) == NULL)
 239                 abort();
 240         for (i = 0, *cp = '\0'; cpp[i] != NULL; i++) {
 241                 strcat(cp, cpp[i]);
 242                 strcat(cp, ":");
 243         }
 244         cp[s - 1] = '\0';               /* eliminate last colon */
 245
 246         return (cp);
 247 }
 248
 249 /*
 250  * Provide defaults for all options and directory lists.
 251  */
 252 void
 253 defaults(void)
 254 {
 255         size_t s;
 256         char *b, buf[BUFSIZ], *cp;
 257         int nele;
 258         FILE *p;
 259         DIR *dir;
 260         struct stat sb;
 261         struct dirent *dirp;
 262
 263         /* default to -bms if none has been specified */
 264         if (!opt_b && !opt_m && !opt_s)
 265                 opt_b = opt_m = opt_s = 1;
 266
 267         /* -b defaults to default path + /usr/libexec +
 268          * /usr/games + user's path */
 269         if (!bindirs) {
 270                 if (sysctlbyname("user.cs_path", (void *)NULL, &s,
 271                                  (void *)NULL, 0) == -1)
 272                         err(EX_OSERR, "sysctlbyname(\"user.cs_path\")");
 273                 if ((b = malloc(s + 1)) == NULL)
 274                         abort();
 275                 if (sysctlbyname("user.cs_path", b, &s, (void *)NULL, 0) == -1)
 276                         err(EX_OSERR, "sysctlbyname(\"user.cs_path\")");
 277                 nele = 0;
 278                 decolonify(b, &bindirs, &nele);
 279                 bindirs = realloc(bindirs, (nele + 3) * sizeof(char *));
 280                 if (bindirs == NULL)
 281                         abort();
 282                 bindirs[nele++] = PATH_LIBEXEC;
 283                 bindirs[nele++] = PATH_GAMES;
 284                 bindirs[nele] = NULL;
 285                 if ((cp = getenv("PATH")) != NULL) {
 286                         /* don't destroy the original environment... */
 287                         if ((b = malloc(strlen(cp) + 1)) == NULL)
 288                                 abort();
 289                         strcpy(b, cp);
 290                         decolonify(b, &bindirs, &nele);
 291                 }
 292         }
 293
 294         /* -m defaults to $(manpath) */
 295         if (!mandirs) {
 296                 if ((p = popen(MANPATHCMD, "r")) == NULL)
 297                         err(EX_OSERR, "cannot execute manpath command");
 298                 if (fgets(buf, BUFSIZ - 1, p) == NULL ||
 299                     pclose(p))
 300                         err(EX_OSERR, "error processing manpath results");
 301                 if ((b = strchr(buf, '\n')) != NULL)
 302                         *b = '\0';
 303                 if ((b = malloc(strlen(buf) + 1)) == NULL)
 304                         abort();
 305                 strcpy(b, buf);
 306                 nele = 0;
 307                 decolonify(b, &mandirs, &nele);
 308         }
 309
 310         /* -s defaults to precompiled list, plus subdirs of /usr/pkgsrc */
 311         if (!sourcedirs) {
 312                 if ((b = malloc(strlen(sourcepath) + 1)) == NULL)
 313                         abort();
 314                 strcpy(b, sourcepath);
 315                 nele = 0;
 316                 decolonify(b, &sourcedirs, &nele);
 317
 318                 if (stat(PATH_PKGSRC, &sb) == -1) {
 319                         if (errno == ENOENT)
 320                                 /* no /usr/pkgsrc, we are done */
 321                                 return;
 322                         err(EX_OSERR, "stat(" PATH_PKGSRC ")");
 323                 }
 324                 if ((sb.st_mode & S_IFMT) != S_IFDIR)
 325                         /* /usr/pkgsrc is not a directory, ignore */
 326                         return;
 327                 if (access(PATH_PKGSRC, R_OK | X_OK) != 0)
 328                         return;
 329                 if ((dir = opendir(PATH_PKGSRC)) == NULL)
 330                         err(EX_OSERR, "opendir" PATH_PKGSRC ")");
 331                 while ((dirp = readdir(dir)) != NULL) {
 332                         if (dirp->d_name[0] == '.' ||
 333                             strcmp(dirp->d_name, "CVS") == 0)
 334                                 /* ignore dot entries and CVS subdir */
 335                                 continue;
 336                         if ((b = malloc(sizeof PATH_PKGSRC + 1 + dirp->d_namlen))
 337                             == NULL)
 338                                 abort();
 339                         strcpy(b, PATH_PKGSRC);
 340                         strcat(b, "/");
 341                         strcat(b, dirp->d_name);
 342                         if (stat(b, &sb) == -1 ||
 343                             (sb.st_mode & S_IFMT) != S_IFDIR ||
 344                             access(b, R_OK | X_OK) != 0) {
 345                                 free(b);
 346                                 continue;
 347                         }
 348                         sourcedirs = realloc(sourcedirs,
 349                                              (nele + 2) * sizeof(char *));
 350                         if (sourcedirs == NULL)
 351                                 abort();
 352                         sourcedirs[nele++] = b;
 353                         sourcedirs[nele] = NULL;
 354                 }
 355                 closedir(dir);
 356         }
 357 }
 358
 359 int
 360 main(int argc, char **argv)
 361 {
 362         int unusual, i, printed;
 363         char *bin, buf[BUFSIZ], *cp, *cp2, *man, *name, *src;
 364         ccharp *dp;
 365         size_t nlen, olen, s;
 366         struct stat sb;
 367         regex_t re, re2;
 368         regmatch_t matches[2];
 369         regoff_t rlen;
 370         FILE *p;
 371
 372         setlocale(LC_ALL, "");
 373         scanopts(argc, argv);
 374         defaults();
 375
 376         if (mandirs == NULL)
 377                 opt_m = 0;
 378         if (bindirs == NULL)
 379                 opt_b = 0;
 380         if (sourcedirs == NULL)
 381                 opt_s = 0;
 382         if (opt_m + opt_b + opt_s == 0)
 383                 errx(EX_DATAERR, "no directories to search");
 384
 385         if (opt_m) {
 386                 if (setenv("MANPATH", colonify(mandirs), 1) == -1)
 387                         err(1, "setenv: cannot set MANPATH=%s", colonify(mandirs));
 388                 if ((i = regcomp(&re, MANWHEREISMATCH, REG_EXTENDED)) != 0) {
 389                         regerror(i, &re, buf, BUFSIZ - 1);
 390                         errx(EX_UNAVAILABLE, "regcomp(%s) failed: %s",
 391                              MANWHEREISMATCH, buf);
 392                 }
 393         }
 394
 395         for (; (name = *query) != NULL; query++) {
 396                 /* strip leading path name component */
 397                 if ((cp = strrchr(name, '/')) != NULL)
 398                         name = cp + 1;
 399                 /* strip SCCS or RCS suffix/prefix */
 400                 if (strlen(name) > 2 && strncmp(name, "s.", 2) == 0)
 401                         name += 2;
 402                 if ((s = strlen(name)) > 2 && strcmp(name + s - 2, ",v") == 0)
 403                         name[s - 2] = '\0';
 404                 /* compression suffix */
 405                 s = strlen(name);
 406                 if (s > 2 &&
 407                     (strcmp(name + s - 2, ".z") == 0 ||
 408                      strcmp(name + s - 2, ".Z") == 0))
 409                         name[s - 2] = '\0';
 410                 else if (s > 3 &&
 411                          strcmp(name + s - 3, ".gz") == 0)
 412                         name[s - 3] = '\0';
 413                 else if (s > 4 &&
 414                          strcmp(name + s - 4, ".bz2") == 0)
 415                         name[s - 4] = '\0';
 416
 417                 unusual = 0;
 418                 bin = man = src = NULL;
 419                 s = strlen(name);
 420
 421                 if (opt_b) {
 422                         /*
 423                          * Binaries have to match exactly, and must be regular
 424                          * executable files.
 425                          */
 426                         unusual = unusual | NO_BIN_FOUND;
 427                         for (dp = bindirs; *dp != NULL; dp++) {
 428                                 cp = malloc(strlen(*dp) + 1 + s + 1);
 429                                 if (cp == NULL)
 430                                         abort();
 431                                 strcpy(cp, *dp);
 432                                 strcat(cp, "/");
 433                                 strcat(cp, name);
 434                                 if (stat(cp, &sb) == 0 &&
 435                                     (sb.st_mode & S_IFMT) == S_IFREG &&
 436                                     (sb.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
 437                                     != 0) {
 438                                         unusual = unusual & ~NO_BIN_FOUND;
 439                                         if (bin == NULL) {
 440                                                 bin = strdup(cp);
 441                                         } else {
 442                                                 olen = strlen(bin);
 443                                                 nlen = strlen(cp);
 444                                                 bin = realloc(bin,
 445                                                               olen + nlen + 2);
 446                                                 if (bin == 0)
 447                                                         abort();
 448                                                 strcat(bin, " ");
 449                                                 strcat(bin, cp);
 450                                         }
 451                                         if (!opt_a) {
 452                                                 free(cp);
 453                                                 break;
 454                                         }
 455                                 }
 456                                 free(cp);
 457                         }
 458                 }
 459
 460                 if (opt_m) {
 461                         /*
 462                          * Ask the man command to perform the search for us.
 463                          */
 464                         unusual = unusual | NO_MAN_FOUND;
 465                         if (opt_a)
 466                                 cp = malloc(sizeof MANWHEREISALLCMD - 2 + s);
 467                         else
 468                                 cp = malloc(sizeof MANWHEREISCMD - 2 + s);
 469
 470                         if (cp == NULL)
 471                                 abort();
 472
 473                         if (opt_a)
 474                                 sprintf(cp, MANWHEREISALLCMD, name);
 475                         else
 476                                 sprintf(cp, MANWHEREISCMD, name);
 477
 478                         if ((p = popen(cp, "r")) != NULL) {
 479
 480                                 while (fgets(buf, BUFSIZ - 1, p) != NULL) {
 481                                         unusual = unusual & ~NO_MAN_FOUND;
 482
 483                                         if ((cp2 = strchr(buf, '\n')) != NULL)
 484                                                 *cp2 = '\0';
 485                                         if (regexec(&re, buf, 2,
 486                                                     matches, 0) == 0 &&
 487                                             (rlen = matches[1].rm_eo -
 488                                              matches[1].rm_so) > 0) {
 489                                                 /*
 490                                                  * man -w found formated
 491                                                  * page, need to pick up
 492                                                  * source page name.
 493                                                  */
 494                                                 cp2 = malloc(rlen + 1);
 495                                                 if (cp2 == NULL)
 496                                                         abort();
 497                                                 memcpy(cp2,
 498                                                        buf + matches[1].rm_so,
 499                                                        rlen);
 500                                                 cp2[rlen] = '\0';
 501                                         } else {
 502                                                 /*
 503                                                  * man -w found plain source
 504                                                  * page, use it.
 505                                                  */
 506                                                 s = strlen(buf);
 507                                                 cp2 = malloc(s + 1);
 508                                                 if (cp2 == NULL)
 509                                                         abort();
 510                                                 strcpy(cp2, buf);
 511                                         }
 512
 513                                         if (man == NULL) {
 514                                                 man = strdup(cp2);
 515                                         } else {
 516                                                 olen = strlen(man);
 517                                                 nlen = strlen(cp2);
 518                                                 man = realloc(man,
 519                                                               olen + nlen + 2);
 520                                                 if (man == 0)
 521                                                         abort();
 522                                                 strcat(man, " ");
 523                                                 strcat(man, cp2);
 524                                         }
 525
 526                                         free(cp2);
 527
 528                                         if (!opt_a)
 529                                                 break;
 530                                 }
 531                                 pclose(p);
 532                                 free(cp);
 533                         }
 534                 }
 535
 536                 if (opt_s) {
 537                         /*
 538                          * Sources match if a subdir with the exact
 539                          * name is found.
 540                          */
 541                         unusual = unusual | NO_SRC_FOUND;
 542                         for (dp = sourcedirs; *dp != NULL; dp++) {
 543                                 cp = malloc(strlen(*dp) + 1 + s + 1);
 544                                 if (cp == NULL)
 545                                         abort();
 546                                 strcpy(cp, *dp);
 547                                 strcat(cp, "/");
 548                                 strcat(cp, name);
 549                                 if (stat(cp, &sb) == 0 &&
 550                                     (sb.st_mode & S_IFMT) == S_IFDIR) {
 551                                         unusual = unusual & ~NO_SRC_FOUND;
 552                                         if (src == NULL) {
 553                                                 src = strdup(cp);
 554                                         } else {
 555                                                 olen = strlen(src);
 556                                                 nlen = strlen(cp);
 557                                                 src = realloc(src,
 558                                                               olen + nlen + 2);
 559                                                 if (src == 0)
 560                                                         abort();
 561                                                 strcat(src, " ");
 562                                                 strcat(src, cp);
 563                                         }
 564                                         if (!opt_a) {
 565                                                 free(cp);
 566                                                 break;
 567                                         }
 568                                 }
 569                                 free(cp);
 570                         }
 571                         /*
 572                          * If still not found, ask locate to search it
 573                          * for us.  This will find sources for things
 574                          * like lpr that are well hidden in the
 575                          * /usr/src tree, but takes a lot longer.
 576                          * Thus, option -x (`expensive') prevents this
 577                          * search.
 578                          *
 579                          * Do only match locate output that starts
 580                          * with one of our source directories, and at
 581                          * least one further level of subdirectories.
 582                          */
 583                         if (opt_x || (src && !opt_a))
 584                                 goto done_sources;
 585
 586                         cp = malloc(sizeof LOCATECMD - 2 + s);
 587                         if (cp == NULL)
 588                                 abort();
 589                         sprintf(cp, LOCATECMD, name);
 590                         if ((p = popen(cp, "r")) == NULL)
 591                                 goto done_sources;
 592                         while ((src == NULL || opt_a) &&
 593                                (fgets(buf, BUFSIZ - 1, p)) != NULL) {
 594                                 if ((cp2 = strchr(buf, '\n')) != NULL)
 595                                         *cp2 = '\0';
 596                                 for (dp = sourcedirs;
 597                                      (src == NULL || opt_a) && *dp != NULL;
 598                                      dp++) {
 599                                         cp2 = malloc(strlen(*dp) + 9);
 600                                         if (cp2 == NULL)
 601                                                 abort();
 602                                         strcpy(cp2, "^");
 603                                         strcat(cp2, *dp);
 604                                         strcat(cp2, "/[^/]+/");
 605                                         if ((i = regcomp(&re2, cp2,
 606                                                          REG_EXTENDED|REG_NOSUB))
 607                                             != 0) {
 608                                                 regerror(i, &re, buf,
 609                                                          BUFSIZ - 1);
 610                                                 errx(EX_UNAVAILABLE,
 611                                                      "regcomp(%s) failed: %s",
 612                                                      cp2, buf);
 613                                         }
 614                                         free(cp2);
 615                                         if (regexec(&re2, buf, 0,
 616                                                     (regmatch_t *)NULL, 0)
 617                                             == 0) {
 618                                                 unusual = unusual &
 619                                                           ~NO_SRC_FOUND;
 620                                                 if (src == NULL) {
 621                                                         src = strdup(buf);
 622                                                 } else {
 623                                                         olen = strlen(src);
 624                                                         nlen = strlen(buf);
 625                                                         src = realloc(src,
 626                                                                       olen +
 627                                                                       nlen + 2);
 628                                                         if (src == 0)
 629                                                                 abort();
 630                                                         strcat(src, " ");
 631                                                         strcat(src, buf);
 632                                                 }
 633                                         }
 634                                         regfree(&re2);
 635                                 }
 636                         }
 637                         pclose(p);
 638                         free(cp);
 639                 }
 640           done_sources:
 641
 642                 if (opt_u && !unusual)
 643                         continue;
 644
 645                 printed = 0;
 646                 if (!opt_q) {
 647                         printf("%s:", name);
 648                         printed++;
 649                 }
 650                 if (bin) {
 651                         if (printed++)
 652                                 putchar(' ');
 653                         fputs(bin, stdout);
 654                 }
 655                 if (man) {
 656                         if (printed++)
 657                                 putchar(' ');
 658                         fputs(man, stdout);
 659                 }
 660                 if (src) {
 661                         if (printed++)
 662                                 putchar(' ');
 663                         fputs(src, stdout);
 664                 }
 665                 if (printed)
 666                         putchar('\n');
 667         }
 668
 669         if (opt_m)
 670                 regfree(&re);
 671
 672         return (0);
 673 }