usr.bin/catman/catman.c

   1 /*-
   2  * Copyright (c) 2002 John Rochester
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/usr.bin/catman/catman.c,v 1.9 2003/06/10 02:18:00 ache Exp $
  29  * $DragonFly: src/usr.bin/catman/catman.c,v 1.4 2008/11/10 16:10:34 swildner Exp $
  30  */
  31
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <sys/param.h>
  35
  36 #include <ctype.h>
  37 #include <dirent.h>
  38 #include <err.h>
  39 #include <fcntl.h>
  40 #include <locale.h>
  41 #include <langinfo.h>
  42 #include <libgen.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47
  48 #define DEFAULT_MANPATH         "/usr/share/man"
  49
  50 #define TOP_LEVEL_DIR   0       /* signifies a top-level man directory */
  51 #define MAN_SECTION_DIR 1       /* signifies a man section directory */
  52 #define UNKNOWN         2       /* signifies an unclassifiable directory */
  53
  54 #define TEST_EXISTS     0x01
  55 #define TEST_DIR        0x02
  56 #define TEST_FILE       0x04
  57 #define TEST_READABLE   0x08
  58 #define TEST_WRITABLE   0x10
  59 #define TEST_EXECUTABLE 0x20
  60
  61 static int verbose;             /* -v flag: be verbose with warnings */
  62 static int pretend;             /* -n, -p flags: print out what would be done
  63                                    instead of actually doing it */
  64 static int force;               /* -f flag: force overwriting all cat pages */
  65 static int rm_junk;             /* -r flag: remove garbage pages */
  66 static char *locale;            /* user's locale if -L is used */
  67 static char *lang_locale;       /* short form of locale */
  68 static const char *machine;
  69 static int exit_code;           /* exit code to use when finished */
  70
  71 /*
  72  * -T argument for nroff
  73  */
  74 static const char *nroff_device = "ascii";
  75
  76 /*
  77  * Mapping from locale to nroff device
  78  */
  79 static const char *locale_device[] = {
  80         "KOI8-R",       "koi8-r",
  81         "ISO8859-1",    "latin1",
  82         "ISO8859-15",   "latin1",
  83         NULL
  84 };
  85
  86 #define BZ2_CMD         "bzip2"
  87 #define BZ2_EXT         ".bz2"
  88 #define BZ2CAT_CMD      "bz"
  89 #define GZ_CMD          "gzip"
  90 #define GZ_EXT          ".gz"
  91 #define GZCAT_CMD       "z"
  92 enum Ziptype {NONE, BZIP, GZIP};
  93
  94 static uid_t uid;
  95 static gid_t gids[NGROUPS_MAX];
  96 static int ngids;
  97 static int starting_dir;
  98 static char tmp_file[MAXPATHLEN];
  99 struct stat test_st;
 100
 101 /*
 102  * A hashtable is an array of chains composed of this entry structure.
 103  */
 104 struct hash_entry {
 105         ino_t           inode_number;
 106         dev_t           device_number;
 107         const char      *data;
 108         struct hash_entry *next;
 109 };
 110
 111 #define HASHTABLE_ALLOC 16384   /* allocation for hashtable (power of 2) */
 112 #define HASH_MASK       (HASHTABLE_ALLOC - 1)
 113
 114 static struct hash_entry *visited[HASHTABLE_ALLOC];
 115 static struct hash_entry *links[HASHTABLE_ALLOC];
 116
 117 /*
 118  * Inserts a string into a hashtable keyed by inode & device number.
 119  */
 120 static void
 121 insert_hashtable(struct hash_entry **table, ino_t inode_number,
 122                  dev_t device_number, const char *data)
 123 {
 124         struct hash_entry *new_entry;
 125         struct hash_entry **chain;
 126
 127         new_entry = malloc(sizeof(struct hash_entry));
 128         if (new_entry == NULL)
 129                 err(1, "can't insert into hashtable");
 130         chain = &table[inode_number & HASH_MASK];
 131         new_entry->inode_number = inode_number;
 132         new_entry->device_number = device_number;
 133         new_entry->data = data;
 134         new_entry->next = *chain;
 135         *chain = new_entry;
 136 }
 137
 138 /*
 139  * Finds a string in a hashtable keyed by inode & device number.
 140  */
 141 static const char *
 142 find_hashtable(struct hash_entry **table, ino_t inode_number,
 143                dev_t device_number)
 144 {
 145         struct hash_entry *chain;
 146
 147         chain = table[inode_number & HASH_MASK];
 148         while (chain != NULL) {
 149                 if (chain->inode_number == inode_number &&
 150                     chain->device_number == device_number)
 151                         return(chain->data);
 152                 chain = chain->next;
 153         }
 154         return(NULL);
 155 }
 156
 157 static void
 158 trap_signal(int sig __unused)
 159 {
 160         if (tmp_file[0] != '\0')
 161                 unlink(tmp_file);
 162         exit(1);
 163 }
 164
 165 /*
 166  * Deals with junk files in the man or cat section directories.
 167  */
 168 static void
 169 junk(const char *mandir, const char *name, const char *reason)
 170 {
 171         if (verbose)
 172                 fprintf(stderr, "%s/%s: %s\n", mandir, name, reason);
 173         if (rm_junk) {
 174                 fprintf(stderr, "rm %s/%s\n", mandir, name);
 175                 if (!pretend && unlink(name) < 0)
 176                         warn("%s/%s", mandir, name);
 177         }
 178 }
 179
 180 /*
 181  * Returns TOP_LEVEL_DIR for .../man, MAN_SECTION_DIR for .../manXXX,
 182  * and UNKNOWN for everything else.
 183  */
 184 static int
 185 directory_type(char *dir)
 186 {
 187         char *p;
 188
 189         for (;;) {
 190                 p = strrchr(dir, '/');
 191                 if (p == NULL || p[1] != '\0')
 192                         break;
 193                 *p = '\0';
 194         }
 195         if (p == NULL)
 196                 p = dir;
 197         else
 198                 p++;
 199         if (strncmp(p, "man", 3) == 0) {
 200                 p += 3;
 201                 if (*p == '\0')
 202                         return TOP_LEVEL_DIR;
 203                 while (isalnum((unsigned char)*p) || *p == '_') {
 204                         if (*++p == '\0')
 205                                 return(MAN_SECTION_DIR);
 206                 }
 207         }
 208         return(UNKNOWN);
 209 }
 210
 211 /*
 212  * Tests whether the given file name (without a preceding path)
 213  * is a proper man page name (like "mk-amd-map.8.gz").
 214  * Only alphanumerics and '_' are allowed after the last '.' and
 215  * the last '.' can't be the first or last characters.
 216  */
 217 static int
 218 is_manpage_name(char *name)
 219 {
 220         char *lastdot = NULL;
 221         char *n;
 222
 223         for (n = name; *n != '\0'; n++) {
 224                 if (isalnum(*n))
 225                         continue;
 226                 switch (*n) {
 227                 case '_':
 228                         break;
 229                 case '-':
 230                 case '+':
 231                 case '[':
 232                 case ':':
 233                         lastdot = NULL;
 234                         break;
 235                 case '.':
 236                         lastdot = n;
 237                         break;
 238                 default:
 239                         return(0);
 240                 }
 241         }
 242         return(lastdot > name && lastdot + 1 < n);
 243 }
 244
 245 static int
 246 is_bzipped(char *name)
 247 {
 248         int len = strlen(name);
 249         return(len >= 5 && strcmp(&name[len - 4], BZ2_EXT) == 0);
 250 }
 251
 252 static int
 253 is_gzipped(char *name)
 254 {
 255         int len = strlen(name);
 256         return(len >= 4 && strcmp(&name[len - 3], GZ_EXT) == 0);
 257 }
 258
 259 /*
 260  * Converts manXXX to catXXX.
 261  */
 262 static char *
 263 get_cat_section(char *section)
 264 {
 265         char *cat_section;
 266
 267         cat_section = strdup(section);
 268         strncpy(cat_section, "cat", 3);
 269         return(cat_section);
 270 }
 271
 272 /*
 273  * Tests to see if the given directory has already been visited.
 274  */
 275 static int
 276 already_visited(char *mandir, char *dir, int count_visit)
 277 {
 278         struct stat st;
 279
 280         if (stat(dir, &st) < 0) {
 281                 if (mandir != NULL)
 282                         warn("%s/%s", mandir, dir);
 283                 else
 284                         warn("%s", dir);
 285                 exit_code = 1;
 286                 return(1);
 287         }
 288         if (find_hashtable(visited, st.st_ino, st.st_dev) != NULL) {
 289                 if (mandir != NULL)
 290                         warnx("already visited %s/%s", mandir, dir);
 291                 else
 292                         warnx("already visited %s", dir);
 293                 return(1);
 294         }
 295         if (count_visit)
 296                 insert_hashtable(visited, st.st_ino, st.st_dev, "");
 297         return(0);
 298 }
 299
 300 /*
 301  * Returns a set of TEST_* bits describing a file's type and permissions.
 302  * If mod_time isn't NULL, it will contain the file's modification time.
 303  */
 304 static int
 305 test_path(char *name, time_t *mod_time)
 306 {
 307         int result;
 308
 309         if (stat(name, &test_st) < 0)
 310                 return(0);
 311         result = TEST_EXISTS;
 312         if (mod_time != NULL)
 313                 *mod_time = test_st.st_mtime;
 314         if (S_ISDIR(test_st.st_mode))
 315                 result |= TEST_DIR;
 316         else if (S_ISREG(test_st.st_mode))
 317                 result |= TEST_FILE;
 318         if (test_st.st_uid == uid) {
 319                 test_st.st_mode >>= 6;
 320         } else {
 321                 int i;
 322                 for (i = 0; i < ngids; i++) {
 323                         if (test_st.st_gid == gids[i]) {
 324                                 test_st.st_mode >>= 3;
 325                                 break;
 326                         }
 327                 }
 328         }
 329         if (test_st.st_mode & S_IROTH)
 330                 result |= TEST_READABLE;
 331         if (test_st.st_mode & S_IWOTH)
 332                 result |= TEST_WRITABLE;
 333         if (test_st.st_mode & S_IXOTH)
 334                 result |= TEST_EXECUTABLE;
 335         return(result);
 336 }
 337
 338 /*
 339  * Checks whether a file is a symbolic link.
 340  */
 341 static int
 342 is_symlink(char *path)
 343 {
 344         struct stat st;
 345
 346         return(lstat(path, &st) >= 0 && S_ISLNK(st.st_mode));
 347 }
 348
 349 /*
 350  * Tests to see if the given directory can be written to.
 351  */
 352 static void
 353 check_writable(char *mandir)
 354 {
 355         if (verbose && !(test_path(mandir, NULL) & TEST_WRITABLE))
 356                 fprintf(stderr, "%s: not writable - will only be able to write "
 357                         "to existing cat directories\n", mandir);
 358 }
 359
 360 /*
 361  * If the directory exists, attempt to make it writable, otherwise
 362  * attempt to create it.
 363  */
 364 static int
 365 make_writable_dir(char *mandir, char *dir)
 366 {
 367         int test;
 368
 369         if ((test = test_path(dir, NULL)) != 0) {
 370                 if (!(test & TEST_WRITABLE) && chmod(dir, 0755) < 0) {
 371                         warn("%s/%s: chmod", mandir, dir);
 372                         exit_code = 1;
 373                         return(0);
 374                 }
 375         } else {
 376                 if (verbose || pretend)
 377                         fprintf(stderr, "mkdir %s\n", dir);
 378                 if (!pretend) {
 379                         unlink(dir);
 380                         if (mkdir(dir, 0755) < 0) {
 381                                 warn("%s/%s: mkdir", mandir, dir);
 382                                 exit_code = 1;
 383                                 return(0);
 384                         }
 385                 }
 386         }
 387         return(1);
 388 }
 389
 390 /*
 391  * Processes a single man page source by using nroff to create
 392  * the preformatted cat page.
 393  */
 394 static void
 395 process_page(char *mandir, char *src, char *cat, enum Ziptype zipped)
 396 {
 397         int src_test, cat_test;
 398         time_t src_mtime, cat_mtime;
 399         char cmd[MAXPATHLEN];
 400         dev_t src_dev;
 401         ino_t src_ino;
 402         const char *link_name;
 403
 404         src_test = test_path(src, &src_mtime);
 405         if (!(src_test & (TEST_FILE|TEST_READABLE))) {
 406                 if (!(src_test & TEST_DIR)) {
 407                         warnx("%s/%s: unreadable", mandir, src);
 408                         exit_code = 1;
 409                         if (rm_junk && is_symlink(src))
 410                                 junk(mandir, src, "bogus symlink");
 411                 }
 412                 return;
 413         }
 414         src_dev = test_st.st_dev;
 415         src_ino = test_st.st_ino;
 416         cat_test = test_path(cat, &cat_mtime);
 417         if (cat_test & (TEST_FILE|TEST_READABLE)) {
 418                 if (!force && cat_mtime >= src_mtime) {
 419                         if (verbose)
 420                                 fprintf(stderr, "\t%s/%s: up to date\n",
 421                                         mandir, src);
 422                         return;
 423                 }
 424         }
 425         /*
 426          * Is the man page a link to one we've already processed?
 427          */
 428         if ((link_name = find_hashtable(links, src_ino, src_dev)) != NULL) {
 429                 if (verbose || pretend)
 430                         fprintf(stderr, "%slink %s -> %s\n",
 431                                 verbose ? "\t" : "", cat, link_name);
 432                 if (!pretend)
 433                         link(link_name, cat);
 434                 return;
 435         }
 436         insert_hashtable(links, src_ino, src_dev, strdup(cat));
 437         if (verbose || pretend) {
 438                 fprintf(stderr, "%sformat %s -> %s\n",
 439                         verbose ? "\t" : "", src, cat);
 440                 if (pretend)
 441                         return;
 442         }
 443         snprintf(tmp_file, sizeof tmp_file, "%s.tmp", cat);
 444         snprintf(cmd, sizeof cmd,
 445                  "%scat %s | tbl | nroff -T%s -man | col | %s > %s.tmp",
 446                  zipped == BZIP ? BZ2CAT_CMD : zipped == GZIP ? GZCAT_CMD : "",
 447                  src, nroff_device,
 448                  zipped == BZIP ? BZ2_CMD : zipped == GZIP ? GZ_CMD : "cat",
 449                  cat);
 450         if (system(cmd) != 0)
 451                 err(1, "formatting pipeline");
 452         if (rename(tmp_file, cat) < 0)
 453                 warn("%s", cat);
 454         tmp_file[0] = '\0';
 455 }
 456
 457 /*
 458  * Scan the man section directory for pages and process each one,
 459  * then check for junk in the corresponding cat section.
 460  */
 461 static void
 462 scan_section(char *mandir, char *section, char *cat_section)
 463 {
 464         struct dirent **entries;
 465         char **expected = NULL;
 466         int npages;
 467         int nexpected = 0;
 468         int i, e;
 469         enum Ziptype zipped;
 470         char *page_name;
 471         char page_path[MAXPATHLEN];
 472         char cat_path[MAXPATHLEN];
 473         char zip_path[MAXPATHLEN];
 474
 475         /*
 476          * scan the man section directory for pages
 477          */
 478         npages = scandir(section, &entries, NULL, alphasort);
 479         if (npages < 0) {
 480                 warn("%s/%s", mandir, section);
 481                 exit_code = 1;
 482                 return;
 483         }
 484         if (verbose || rm_junk) {
 485                 /*
 486                  * Maintain a list of all cat pages that should exist,
 487                  * corresponding to existing man pages.
 488                  */
 489                 expected = (char **) calloc(npages, sizeof(char *));
 490         }
 491         for (i = 0; i < npages; free(entries[i++])) {
 492                 page_name = entries[i]->d_name;
 493                 snprintf(page_path, sizeof page_path, "%s/%s", section,
 494                     page_name);
 495                 if (!is_manpage_name(page_name)) {
 496                         if (!(test_path(page_path, NULL) & TEST_DIR)) {
 497                                 junk(mandir, page_path,
 498                                     "invalid man page name");
 499                         }
 500                         continue;
 501                 }
 502                 zipped = is_bzipped(page_name) ? BZIP :
 503                     is_gzipped(page_name) ? GZIP : NONE;
 504                 if (zipped != NONE) {
 505                         snprintf(cat_path, sizeof cat_path, "%s/%s",
 506                             cat_section, page_name);
 507                         if (expected != NULL)
 508                                 expected[nexpected++] = strdup(page_name);
 509                         process_page(mandir, page_path, cat_path, zipped);
 510                 } else {
 511                         /*
 512                          * We've got an uncompressed man page,
 513                          * check to see if there's a (preferred)
 514                          * compressed one.
 515                          */
 516                         snprintf(zip_path, sizeof zip_path, "%s%s",
 517                             page_path, GZ_EXT);
 518                         if (test_path(zip_path, NULL) != 0) {
 519                                 junk(mandir, page_path,
 520                                      "man page unused due to existing " GZ_EXT);
 521                         } else {
 522                                 if (verbose) {
 523                                         fprintf(stderr,
 524                                                 "warning, %s is uncompressed\n",
 525                                                 page_path);
 526                                 }
 527                                 snprintf(cat_path, sizeof cat_path, "%s/%s",
 528                                     cat_section, page_name);
 529                                 if (expected != NULL) {
 530                                         asprintf(&expected[nexpected++],
 531                                             "%s", page_name);
 532                                 }
 533                                 process_page(mandir, page_path, cat_path, NONE);
 534                         }
 535                 }
 536         }
 537         free(entries);
 538         if (expected == NULL)
 539                 return;
 540         /*
 541          * scan cat sections for junk
 542          */
 543         npages = scandir(cat_section, &entries, NULL, alphasort);
 544         e = 0;
 545         for (i = 0; i < npages; free(entries[i++])) {
 546                 const char *junk_reason;
 547                 int cmp = 1;
 548
 549                 page_name = entries[i]->d_name;
 550                 if (strcmp(page_name, ".") == 0 || strcmp(page_name, "..") == 0)
 551                         continue;
 552                 /*
 553                  * Keep the index into the expected cat page list
 554                  * ahead of the name we've found.
 555                  */
 556                 while (e < nexpected &&
 557                        (cmp = strcmp(page_name, expected[e])) > 0)
 558                         free(expected[e++]);
 559                 if (cmp == 0)
 560                         continue;
 561                 /* we have an unexpected page */
 562                 snprintf(cat_path, sizeof cat_path, "%s/%s", cat_section,
 563                     page_name);
 564                 if (!is_manpage_name(page_name)) {
 565                         if (test_path(cat_path, NULL) & TEST_DIR)
 566                                 continue;
 567                         junk_reason = "invalid cat page name";
 568                 } else if (!is_gzipped(page_name) && e + 1 < nexpected &&
 569                     strncmp(page_name, expected[e + 1], strlen(page_name)) == 0 &&
 570                     strlen(expected[e + 1]) == strlen(page_name) + 3) {
 571                         junk_reason = "cat page unused due to existing " GZ_EXT;
 572                 } else
 573                         junk_reason = "cat page without man page";
 574                 junk(mandir, cat_path, junk_reason);
 575         }
 576         free(entries);
 577         while (e < nexpected)
 578                 free(expected[e++]);
 579         free(expected);
 580 }
 581
 582
 583 /*
 584  * Processes a single man section.
 585  */
 586 static void
 587 process_section(char *mandir, char *section)
 588 {
 589         char *cat_section;
 590
 591         if (already_visited(mandir, section, 1))
 592                 return;
 593         if (verbose)
 594                 fprintf(stderr, "  section %s\n", section);
 595         cat_section = get_cat_section(section);
 596         if (make_writable_dir(mandir, cat_section))
 597                 scan_section(mandir, section, cat_section);
 598         free(cat_section);
 599 }
 600
 601 static int
 602 select_sections(struct dirent *entry)
 603 {
 604         return(directory_type(entry->d_name) == MAN_SECTION_DIR);
 605 }
 606
 607 /*
 608  * Processes a single top-level man directory.  If section isn't NULL,
 609  * it will only process that section sub-directory, otherwise it will
 610  * process all of them.
 611  */
 612 static void
 613 process_mandir(char *dir_name, char *section)
 614 {
 615         fchdir(starting_dir);
 616         if (already_visited(NULL, dir_name, section == NULL))
 617                 return;
 618         check_writable(dir_name);
 619         if (verbose)
 620                 fprintf(stderr, "man directory %s\n", dir_name);
 621         if (pretend)
 622                 fprintf(stderr, "cd %s\n", dir_name);
 623         if (chdir(dir_name) < 0) {
 624                 warn("%s: chdir", dir_name);
 625                 exit_code = 1;
 626                 return;
 627         }
 628         if (section != NULL) {
 629                 process_section(dir_name, section);
 630         } else {
 631                 struct dirent **entries;
 632                 char *machine_dir;
 633                 int nsections;
 634                 int i;
 635
 636                 nsections = scandir(".", &entries, select_sections, alphasort);
 637                 if (nsections < 0) {
 638                         warn("%s", dir_name);
 639                         exit_code = 1;
 640                         return;
 641                 }
 642                 for (i = 0; i < nsections; i++) {
 643                         process_section(dir_name, entries[i]->d_name);
 644                         asprintf(&machine_dir, "%s/%s", entries[i]->d_name,
 645                             machine);
 646                         if (test_path(machine_dir, NULL) & TEST_DIR)
 647                                 process_section(dir_name, machine_dir);
 648                         free(machine_dir);
 649                         free(entries[i]);
 650                 }
 651                 free(entries);
 652         }
 653 }
 654
 655 /*
 656  * Processes one argument, which may be a colon-separated list of
 657  * directories.
 658  */
 659 static void
 660 process_argument(const char *arg)
 661 {
 662         char *dir;
 663         char *mandir;
 664         char *section;
 665         char *parg;
 666
 667         parg = strdup(arg);
 668         if (parg == NULL)
 669                 err(1, "out of memory");
 670         while ((dir = strsep(&parg, ":")) != NULL) {
 671                 switch (directory_type(dir)) {
 672                 case TOP_LEVEL_DIR:
 673                         if (locale != NULL) {
 674                                 asprintf(&mandir, "%s/%s", dir, locale);
 675                                 process_mandir(mandir, NULL);
 676                                 free(mandir);
 677                                 if (lang_locale != NULL) {
 678                                         asprintf(&mandir, "%s/%s", dir,
 679                                                  lang_locale);
 680                                         process_mandir(mandir, NULL);
 681                                         free(mandir);
 682                                 }
 683                         } else {
 684                                 process_mandir(dir, NULL);
 685                         }
 686                         break;
 687                 case MAN_SECTION_DIR: {
 688                         mandir = strdup(dirname(dir));
 689                         section = strdup(basename(dir));
 690                         process_mandir(mandir, section);
 691                         free(mandir);
 692                         free(section);
 693                         break;
 694                         }
 695                 default:
 696                         warnx("%s: directory name not in proper man form", dir);
 697                         exit_code = 1;
 698                 }
 699         }
 700         free(parg);
 701 }
 702
 703 static void
 704 determine_locale(void)
 705 {
 706         char *sep;
 707
 708         if ((locale = setlocale(LC_CTYPE, "")) == NULL) {
 709                 warnx("-L option used, but no locale found\n");
 710                 return;
 711         }
 712         sep = strchr(locale, '_');
 713         if (sep != NULL && isupper(sep[1]) && isupper(sep[2]))
 714                 asprintf(&lang_locale, "%.*s%s", (int)(sep - locale), locale,
 715                     &sep[3]);
 716         sep = nl_langinfo(CODESET);
 717         if (sep != NULL && *sep != '\0' && strcmp(sep, "US-ASCII") != 0) {
 718                 int i;
 719
 720                 for (i = 0; locale_device[i] != NULL; i += 2) {
 721                         if (strcmp(sep, locale_device[i]) == 0) {
 722                                 nroff_device = locale_device[i + 1];
 723                                 break;
 724                         }
 725                 }
 726         }
 727         if (verbose) {
 728                 if (lang_locale != NULL)
 729                         fprintf(stderr, "short locale is %s\n", lang_locale);
 730                 fprintf(stderr, "nroff device is %s\n", nroff_device);
 731         }
 732 }
 733
 734 static void
 735 usage(void)
 736 {
 737         fprintf(stderr, "usage: %s [-fLnrv] [directories ...]\n",
 738             getprogname());
 739         exit(1);
 740 }
 741
 742 int
 743 main(int argc, char **argv)
 744 {
 745         int opt;
 746
 747         if ((uid = getuid()) == 0) {
 748                 fprintf(stderr, "don't run %s as root, use:\n   echo", argv[0]);
 749                 for (optind = 0; optind < argc; optind++)
 750                         fprintf(stderr, " %s", argv[optind]);
 751                 fprintf(stderr, " | nice -5 su -m man\n");
 752                 exit(1);
 753         }
 754         while ((opt = getopt(argc, argv, "vnfLrh")) != -1) {
 755                 switch (opt) {
 756                 case 'f':
 757                         force++;
 758                         break;
 759                 case 'L':
 760                         determine_locale();
 761                         break;
 762                 case 'n':
 763                         pretend++;
 764                         break;
 765                 case 'r':
 766                         rm_junk++;
 767                         break;
 768                 case 'v':
 769                         verbose++;
 770                         break;
 771                 default:
 772                         usage();
 773                         /* NOTREACHED */
 774                 }
 775         }
 776         ngids = getgroups(NGROUPS_MAX, gids);
 777         if ((starting_dir = open(".", 0)) < 0)
 778                 err(1, ".");
 779         umask(022);
 780         signal(SIGINT, trap_signal);
 781         signal(SIGHUP, trap_signal);
 782         signal(SIGQUIT, trap_signal);
 783         signal(SIGTERM, trap_signal);
 784
 785         if ((machine = getenv("MACHINE")) == NULL)
 786                 machine = MACHINE;
 787
 788         if (optind == argc) {
 789                 const char *manpath = getenv("MANPATH");
 790                 if (manpath == NULL)
 791                         manpath = DEFAULT_MANPATH;
 792                 process_argument(manpath);
 793         } else {
 794                 while (optind < argc)
 795                         process_argument(argv[optind++]);
 796         }
 797         exit(exit_code);
 798 }