mandoc-db.c

   1 /*      $Id: mandoc-db.c,v 1.9 2011/04/05 14:16:05 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <sys/param.h>
  22
  23 #include <assert.h>
  24 #ifdef __linux__
  25 # include <db_185.h>
  26 #else
  27 # include <db.h>
  28 #endif
  29 #include <fcntl.h>
  30 #include <getopt.h>
  31 #include <stdio.h>
  32 #include <stdint.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 #include "man.h"
  37 #include "mdoc.h"
  38 #include "mandoc.h"
  39
  40 #define MANDOC_DB        "mandoc.db"
  41 #define MANDOC_IDX       "mandoc.index"
  42 #define MANDOC_BUFSZ      BUFSIZ
  43 #define MANDOC_FLAGS      O_CREAT|O_TRUNC|O_RDWR
  44
  45 enum    type {
  46         MANDOC_NONE = 0,
  47         MANDOC_NAME,
  48         MANDOC_FUNCTION,
  49         MANDOC_UTILITY,
  50         MANDOC_INCLUDES,
  51         MANDOC_VARIABLE
  52 };
  53
  54 #define MAN_ARGS          DB *db, \
  55                           const char *dbn, \
  56                           DBT *key, size_t *ksz, \
  57                           DBT *val, \
  58                           const struct man_node *n
  59 #define MDOC_ARGS         DB *db, \
  60                           const char *dbn, \
  61                           DBT *key, size_t *ksz, \
  62                           DBT *val, \
  63                           const struct mdoc_node *n
  64
  65 static  void              dbt_append(DBT *, size_t *, const char *);
  66 static  void              dbt_appendb(DBT *, size_t *,
  67                                 const void *, size_t);
  68 static  void              dbt_init(DBT *, size_t *);
  69 static  void              dbt_put(DB *, const char *, DBT *, DBT *);
  70 static  void              usage(void);
  71 static  void              pman(DB *, const char *, DBT *,
  72                                 size_t *, DBT *, struct man *);
  73 static  int               pman_node(MAN_ARGS);
  74 static  void              pmdoc(DB *, const char *, DBT *,
  75                                 size_t *, DBT *, struct mdoc *);
  76 static  void              pmdoc_node(MDOC_ARGS);
  77 static  void              pmdoc_Fd(MDOC_ARGS);
  78 static  void              pmdoc_In(MDOC_ARGS);
  79 static  void              pmdoc_Fn(MDOC_ARGS);
  80 static  void              pmdoc_Fo(MDOC_ARGS);
  81 static  void              pmdoc_Nm(MDOC_ARGS);
  82 static  void              pmdoc_Vt(MDOC_ARGS);
  83
  84 typedef void            (*pmdoc_nf)(MDOC_ARGS);
  85
  86 static  const char       *progname;
  87
  88 static  const pmdoc_nf    mdocs[MDOC_MAX] = {
  89         NULL, /* Ap */
  90         NULL, /* Dd */
  91         NULL, /* Dt */
  92         NULL, /* Os */
  93         NULL, /* Sh */
  94         NULL, /* Ss */
  95         NULL, /* Pp */
  96         NULL, /* D1 */
  97         NULL, /* Dl */
  98         NULL, /* Bd */
  99         NULL, /* Ed */
 100         NULL, /* Bl */
 101         NULL, /* El */
 102         NULL, /* It */
 103         NULL, /* Ad */
 104         NULL, /* An */
 105         NULL, /* Ar */
 106         NULL, /* Cd */
 107         NULL, /* Cm */
 108         NULL, /* Dv */
 109         NULL, /* Er */
 110         NULL, /* Ev */
 111         NULL, /* Ex */
 112         NULL, /* Fa */
 113         pmdoc_Fd, /* Fd */
 114         NULL, /* Fl */
 115         pmdoc_Fn, /* Fn */
 116         NULL, /* Ft */
 117         NULL, /* Ic */
 118         pmdoc_In, /* In */
 119         NULL, /* Li */
 120         NULL, /* Nd */
 121         pmdoc_Nm, /* Nm */
 122         NULL, /* Op */
 123         NULL, /* Ot */
 124         NULL, /* Pa */
 125         NULL, /* Rv */
 126         NULL, /* St */
 127         pmdoc_Vt, /* Va */
 128         pmdoc_Vt, /* Vt */
 129         NULL, /* Xr */
 130         NULL, /* %A */
 131         NULL, /* %B */
 132         NULL, /* %D */
 133         NULL, /* %I */
 134         NULL, /* %J */
 135         NULL, /* %N */
 136         NULL, /* %O */
 137         NULL, /* %P */
 138         NULL, /* %R */
 139         NULL, /* %T */
 140         NULL, /* %V */
 141         NULL, /* Ac */
 142         NULL, /* Ao */
 143         NULL, /* Aq */
 144         NULL, /* At */
 145         NULL, /* Bc */
 146         NULL, /* Bf */
 147         NULL, /* Bo */
 148         NULL, /* Bq */
 149         NULL, /* Bsx */
 150         NULL, /* Bx */
 151         NULL, /* Db */
 152         NULL, /* Dc */
 153         NULL, /* Do */
 154         NULL, /* Dq */
 155         NULL, /* Ec */
 156         NULL, /* Ef */
 157         NULL, /* Em */
 158         NULL, /* Eo */
 159         NULL, /* Fx */
 160         NULL, /* Ms */
 161         NULL, /* No */
 162         NULL, /* Ns */
 163         NULL, /* Nx */
 164         NULL, /* Ox */
 165         NULL, /* Pc */
 166         NULL, /* Pf */
 167         NULL, /* Po */
 168         NULL, /* Pq */
 169         NULL, /* Qc */
 170         NULL, /* Ql */
 171         NULL, /* Qo */
 172         NULL, /* Qq */
 173         NULL, /* Re */
 174         NULL, /* Rs */
 175         NULL, /* Sc */
 176         NULL, /* So */
 177         NULL, /* Sq */
 178         NULL, /* Sm */
 179         NULL, /* Sx */
 180         NULL, /* Sy */
 181         NULL, /* Tn */
 182         NULL, /* Ux */
 183         NULL, /* Xc */
 184         NULL, /* Xo */
 185         pmdoc_Fo, /* Fo */
 186         NULL, /* Fc */
 187         NULL, /* Oo */
 188         NULL, /* Oc */
 189         NULL, /* Bk */
 190         NULL, /* Ek */
 191         NULL, /* Bt */
 192         NULL, /* Hf */
 193         NULL, /* Fr */
 194         NULL, /* Ud */
 195         NULL, /* Lb */
 196         NULL, /* Lp */
 197         NULL, /* Lk */
 198         NULL, /* Mt */
 199         NULL, /* Brq */
 200         NULL, /* Bro */
 201         NULL, /* Brc */
 202         NULL, /* %C */
 203         NULL, /* Es */
 204         NULL, /* En */
 205         NULL, /* Dx */
 206         NULL, /* %Q */
 207         NULL, /* br */
 208         NULL, /* sp */
 209         NULL, /* %U */
 210         NULL, /* Ta */
 211 };
 212
 213 int
 214 main(int argc, char *argv[])
 215 {
 216         struct mparse   *mp; /* parse sequence */
 217         struct mdoc     *mdoc; /* resulting mdoc */
 218         struct man      *man; /* resulting man */
 219         char            *fn;
 220         const char      *dir; /* result dir (default: cwd) */
 221         char             ibuf[MAXPATHLEN], /* index fname */
 222                          ibbuf[MAXPATHLEN], /* index backup fname */
 223                          fbuf[MAXPATHLEN],  /* btree fname */
 224                          fbbuf[MAXPATHLEN]; /* btree backup fname */
 225         int              c;
 226         DB              *idx, /* index database */
 227                         *db; /* keyword database */
 228         DBT              rkey, rval, /* recno entries */
 229                          key, val; /* persistent keyword entries */
 230         size_t           ksz; /* entry buffer size */
 231         char             vbuf[8];
 232         BTREEINFO        info; /* btree configuration */
 233         recno_t          rec;
 234         extern int       optind;
 235         extern char     *optarg;
 236
 237         progname = strrchr(argv[0], '/');
 238         if (progname == NULL)
 239                 progname = argv[0];
 240         else
 241                 ++progname;
 242
 243         dir = "";
 244
 245         while (-1 != (c = getopt(argc, argv, "d:")))
 246                 switch (c) {
 247                 case ('d'):
 248                         dir = optarg;
 249                         break;
 250                 default:
 251                         usage();
 252                         return((int)MANDOCLEVEL_BADARG);
 253                 }
 254
 255         argc -= optind;
 256         argv += optind;
 257
 258         /*
 259          * Set up temporary file-names into which we're going to write
 260          * all of our data (both for the index and database).  These
 261          * will be securely renamed to the real file-names after we've
 262          * written all of our data.
 263          */
 264
 265         ibuf[0] = ibuf[MAXPATHLEN - 2] =
 266                 ibbuf[0] = ibbuf[MAXPATHLEN - 2] =
 267                 fbuf[0] = fbuf[MAXPATHLEN - 2] =
 268                 fbbuf[0] = fbbuf[MAXPATHLEN - 2] = '\0';
 269
 270         strlcat(fbuf, dir, MAXPATHLEN);
 271         strlcat(fbuf, MANDOC_DB, MAXPATHLEN);
 272
 273         strlcat(fbbuf, fbuf, MAXPATHLEN);
 274         strlcat(fbbuf, "~", MAXPATHLEN);
 275
 276         strlcat(ibuf, dir, MAXPATHLEN);
 277         strlcat(ibuf, MANDOC_IDX, MAXPATHLEN);
 278
 279         strlcat(ibbuf, ibuf, MAXPATHLEN);
 280         strlcat(ibbuf, "~", MAXPATHLEN);
 281
 282         if ('\0' != fbuf[MAXPATHLEN - 2] ||
 283                         '\0' != fbbuf[MAXPATHLEN - 2] ||
 284                         '\0' != ibuf[MAXPATHLEN - 2] ||
 285                         '\0' != ibbuf[MAXPATHLEN - 2]) {
 286                 fprintf(stderr, "%s: Path too long\n", progname);
 287                 exit((int)MANDOCLEVEL_SYSERR);
 288         }
 289
 290         /*
 291          * For the keyword database, open a BTREE database that allows
 292          * duplicates.  For the index database, use a standard RECNO
 293          * database type.
 294          */
 295
 296         memset(&info, 0, sizeof(BTREEINFO));
 297         info.flags = R_DUP;
 298         db = dbopen(fbbuf, MANDOC_FLAGS, 0644, DB_BTREE, &info);
 299
 300         if (NULL == db) {
 301                 perror(fbbuf);
 302                 exit((int)MANDOCLEVEL_SYSERR);
 303         }
 304
 305         idx = dbopen(ibbuf, MANDOC_FLAGS, 0644, DB_RECNO, NULL);
 306
 307         if (NULL == db) {
 308                 perror(ibbuf);
 309                 (*db->close)(db);
 310                 exit((int)MANDOCLEVEL_SYSERR);
 311         }
 312
 313         /*
 314          * Try parsing the manuals given on the command line.  If we
 315          * totally fail, then just keep on going.  Take resulting trees
 316          * and push them down into the database code.
 317          * Use the auto-parser and don't report any errors.
 318          */
 319
 320         mp = mparse_alloc(MPARSE_AUTO, MANDOCLEVEL_FATAL, NULL, NULL);
 321
 322         memset(&key, 0, sizeof(DBT));
 323         memset(&val, 0, sizeof(DBT));
 324         memset(&rkey, 0, sizeof(DBT));
 325         memset(&rval, 0, sizeof(DBT));
 326
 327         val.size = sizeof(vbuf);
 328         val.data = vbuf;
 329         rkey.size = sizeof(recno_t);
 330
 331         rec = 1;
 332         ksz = 0;
 333
 334         while (NULL != (fn = *argv++)) {
 335                 mparse_reset(mp);
 336
 337                 if (mparse_readfd(mp, -1, fn) >= MANDOCLEVEL_FATAL) {
 338                         fprintf(stderr, "%s: Parse failure\n", fn);
 339                         continue;
 340                 }
 341
 342                 mparse_result(mp, &mdoc, &man);
 343                 if (NULL == mdoc && NULL == man)
 344                         continue;
 345
 346                 rkey.data = &rec;
 347                 rval.data = fn;
 348                 rval.size = strlen(fn) + 1;
 349
 350                 if (-1 == (*idx->put)(idx, &rkey, &rval, 0)) {
 351                         perror(ibbuf);
 352                         break;
 353                 }
 354
 355                 memset(val.data, 0, sizeof(uint32_t));
 356                 memcpy(val.data + 4, &rec, sizeof(uint32_t));
 357
 358                 if (mdoc)
 359                         pmdoc(db, fbbuf, &key, &ksz, &val, mdoc);
 360                 else
 361                         pman(db, fbbuf, &key, &ksz, &val, man);
 362                 rec++;
 363         }
 364
 365         (*db->close)(db);
 366         (*idx->close)(idx);
 367
 368         mparse_free(mp);
 369
 370         free(key.data);
 371
 372         /* Atomically replace the file with our temporary one. */
 373
 374         if (-1 == rename(fbbuf, fbuf))
 375                 perror(fbuf);
 376         if (-1 == rename(ibbuf, ibuf))
 377                 perror(fbuf);
 378
 379         return((int)MANDOCLEVEL_OK);
 380 }
 381
 382 /*
 383  * Initialise the stored database key whose data buffer is shared
 384  * between uses (as the key must sometimes be constructed from an array
 385  * of
 386  */
 387 static void
 388 dbt_init(DBT *key, size_t *ksz)
 389 {
 390
 391         if (0 == *ksz) {
 392                 assert(0 == key->size);
 393                 assert(NULL == key->data);
 394                 key->data = mandoc_malloc(MANDOC_BUFSZ);
 395                 *ksz = MANDOC_BUFSZ;
 396         }
 397
 398         key->size = 0;
 399 }
 400
 401 /*
 402  * Append a binary value to a database entry.  This can be invoked
 403  * multiple times; the buffer is automatically resized.
 404  */
 405 static void
 406 dbt_appendb(DBT *key, size_t *ksz, const void *cp, size_t sz)
 407 {
 408
 409         assert(key->data);
 410
 411         /* Overshoot by MANDOC_BUFSZ. */
 412
 413         while (key->size + sz >= *ksz) {
 414                 *ksz = key->size + sz + MANDOC_BUFSZ;
 415                 key->data = mandoc_realloc(key->data, *ksz);
 416         }
 417
 418         memcpy(key->data + (int)key->size, cp, sz);
 419         key->size += sz;
 420 }
 421
 422 /*
 423  * Append a nil-terminated string to the database entry.  This can be
 424  * invoked multiple times.  The database entry will be nil-terminated as
 425  * well; if invoked multiple times, a space is put between strings.
 426  */
 427 static void
 428 dbt_append(DBT *key, size_t *ksz, const char *cp)
 429 {
 430         size_t           sz;
 431
 432         if (0 == (sz = strlen(cp)))
 433                 return;
 434
 435         assert(key->data);
 436
 437         if (key->size)
 438                 ((char *)key->data)[(int)key->size - 1] = ' ';
 439
 440         dbt_appendb(key, ksz, cp, sz + 1);
 441 }
 442
 443 /* ARGSUSED */
 444 static void
 445 pmdoc_Fd(MDOC_ARGS)
 446 {
 447         uint32_t         fl;
 448         const char      *start, *end;
 449         size_t           sz;
 450         char             nil;
 451
 452         if (SEC_SYNOPSIS != n->sec)
 453                 return;
 454         if (NULL == (n = n->child) || MDOC_TEXT != n->type)
 455                 return;
 456
 457         /*
 458          * Only consider those `Fd' macro fields that begin with an
 459          * "inclusion" token (versus, e.g., #define).
 460          */
 461         if (strcmp("#include", n->string))
 462                 return;
 463
 464         if (NULL == (n = n->next) || MDOC_TEXT != n->type)
 465                 return;
 466
 467         /*
 468          * Strip away the enclosing angle brackets and make sure we're
 469          * not zero-length.
 470          */
 471
 472         start = n->string;
 473         if ('<' == *start || '"' == *start)
 474                 start++;
 475
 476         if (0 == (sz = strlen(start)))
 477                 return;
 478
 479         end = &start[(int)sz - 1];
 480         if ('>' == *end || '"' == *end)
 481                 end--;
 482
 483         nil = '\0';
 484         dbt_appendb(key, ksz, start, end - start + 1);
 485         dbt_appendb(key, ksz, &nil, 1);
 486
 487         fl = MANDOC_INCLUDES;
 488         memcpy(val->data, &fl, 4);
 489 }
 490
 491 /* ARGSUSED */
 492 static void
 493 pmdoc_In(MDOC_ARGS)
 494 {
 495         uint32_t         fl;
 496
 497         if (SEC_SYNOPSIS != n->sec)
 498                 return;
 499         if (NULL == n->child || MDOC_TEXT != n->child->type)
 500                 return;
 501
 502         dbt_append(key, ksz, n->child->string);
 503         fl = MANDOC_INCLUDES;
 504         memcpy(val->data, &fl, 4);
 505 }
 506
 507 /* ARGSUSED */
 508 static void
 509 pmdoc_Fn(MDOC_ARGS)
 510 {
 511         uint32_t         fl;
 512         const char      *cp;
 513
 514         if (SEC_SYNOPSIS != n->sec)
 515                 return;
 516         if (NULL == n->child || MDOC_TEXT != n->child->type)
 517                 return;
 518
 519         /* .Fn "struct type *arg" "foo" */
 520
 521         cp = strrchr(n->child->string, ' ');
 522         if (NULL == cp)
 523                 cp = n->child->string;
 524
 525         /* Strip away pointer symbol. */
 526
 527         while ('*' == *cp)
 528                 cp++;
 529
 530         dbt_append(key, ksz, cp);
 531         fl = MANDOC_FUNCTION;
 532         memcpy(val->data, &fl, 4);
 533 }
 534
 535 /* ARGSUSED */
 536 static void
 537 pmdoc_Vt(MDOC_ARGS)
 538 {
 539         uint32_t         fl;
 540         const char      *start, *end;
 541         size_t           sz;
 542         char             nil;
 543
 544         if (SEC_SYNOPSIS != n->sec)
 545                 return;
 546         if (MDOC_Vt == n->tok && MDOC_BODY != n->type)
 547                 return;
 548         if (NULL == n->last || MDOC_TEXT != n->last->type)
 549                 return;
 550
 551         /*
 552          * Strip away leading pointer symbol '*' and trailing ';'.
 553          */
 554
 555         start = n->last->string;
 556
 557         while ('*' == *start)
 558                 start++;
 559
 560         if (0 == (sz = strlen(start)))
 561                 return;
 562
 563         end = &start[sz - 1];
 564         while (end > start && ';' == *end)
 565                 end--;
 566
 567         if (end == start)
 568                 return;
 569
 570         nil = '\0';
 571         dbt_appendb(key, ksz, start, end - start + 1);
 572         dbt_appendb(key, ksz, &nil, 1);
 573         fl = MANDOC_VARIABLE;
 574         memcpy(val->data, &fl, 4);
 575 }
 576
 577 /* ARGSUSED */
 578 static void
 579 pmdoc_Fo(MDOC_ARGS)
 580 {
 581         uint32_t         fl;
 582
 583         if (SEC_SYNOPSIS != n->sec || MDOC_HEAD != n->type)
 584                 return;
 585         if (NULL == n->child || MDOC_TEXT != n->child->type)
 586                 return;
 587
 588         dbt_append(key, ksz, n->child->string);
 589         fl = MANDOC_FUNCTION;
 590         memcpy(val->data, &fl, 4);
 591 }
 592
 593 /* ARGSUSED */
 594 static void
 595 pmdoc_Nm(MDOC_ARGS)
 596 {
 597         uint32_t         fl;
 598
 599         if (SEC_NAME == n->sec) {
 600                 for (n = n->child; n; n = n->next) {
 601                         if (MDOC_TEXT != n->type)
 602                                 continue;
 603                         dbt_append(key, ksz, n->string);
 604                 }
 605                 fl = MANDOC_NAME;
 606                 memcpy(val->data, &fl, 4);
 607                 return;
 608         } else if (SEC_SYNOPSIS != n->sec || MDOC_HEAD != n->type)
 609                 return;
 610
 611         for (n = n->child; n; n = n->next) {
 612                 if (MDOC_TEXT != n->type)
 613                         continue;
 614                 dbt_append(key, ksz, n->string);
 615         }
 616
 617         fl = MANDOC_UTILITY;
 618         memcpy(val->data, &fl, 4);
 619 }
 620
 621 static void
 622 dbt_put(DB *db, const char *dbn, DBT *key, DBT *val)
 623 {
 624
 625         if (0 == key->size)
 626                 return;
 627
 628         assert(key->data);
 629         assert(8 == val->size);
 630         assert(val->data);
 631
 632         if (0 == (*db->put)(db, key, val, 0))
 633                 return;
 634
 635         perror(dbn);
 636         exit((int)MANDOCLEVEL_SYSERR);
 637         /* NOTREACHED */
 638 }
 639
 640 /*
 641  * Call out to per-macro handlers after clearing the persistent database
 642  * key.  If the macro sets the database key, flush it to the database.
 643  */
 644 static void
 645 pmdoc_node(MDOC_ARGS)
 646 {
 647
 648         if (NULL == n)
 649                 return;
 650
 651         switch (n->type) {
 652         case (MDOC_HEAD):
 653                 /* FALLTHROUGH */
 654         case (MDOC_BODY):
 655                 /* FALLTHROUGH */
 656         case (MDOC_TAIL):
 657                 /* FALLTHROUGH */
 658         case (MDOC_BLOCK):
 659                 /* FALLTHROUGH */
 660         case (MDOC_ELEM):
 661                 if (NULL == mdocs[n->tok])
 662                         break;
 663
 664                 dbt_init(key, ksz);
 665                 (*mdocs[n->tok])(db, dbn, key, ksz, val, n);
 666
 667                 dbt_put(db, dbn, key, val);
 668                 break;
 669         default:
 670                 break;
 671         }
 672
 673         pmdoc_node(db, dbn, key, ksz, val, n->child);
 674         pmdoc_node(db, dbn, key, ksz, val, n->next);
 675 }
 676
 677 static int
 678 pman_node(MAN_ARGS)
 679 {
 680         const struct man_node *head, *body;
 681         const char      *start;
 682         char             nil;
 683         size_t           sz;
 684         uint32_t         fl;
 685
 686         if (NULL == n)
 687                 return(0);
 688
 689         /*
 690          * We're only searching for one thing: the first text child in
 691          * the BODY of a NAME section.  Since we don't keep track of
 692          * sections in -man, run some hoops to find out whether we're in
 693          * the correct section or not.
 694          */
 695
 696         if (MAN_BODY == n->type && MAN_SH == n->tok) {
 697                 body = n;
 698                 assert(body->parent);
 699                 if (NULL != (head = body->parent->head) &&
 700                                 1 == head->nchild &&
 701                                 NULL != (head = (head->child)) &&
 702                                 MAN_TEXT == head->type &&
 703                                 0 == strcmp(head->string, "NAME") &&
 704                                 NULL != (body = body->child) &&
 705                                 MAN_TEXT == body->type) {
 706                         nil = '\0';
 707
 708                         fl = MANDOC_NAME;
 709                         memcpy(val->data, &fl, 4);
 710
 711                         start = body->string;
 712
 713                         /*
 714                          * Go through a special heuristic dance here.
 715                          * This is why -man manuals are great!
 716                          * Conventionally, one or more manual names are
 717                          * comma-specified prior to a whitespace, then a
 718                          * dash, then a description.  Try to puzzle out
 719                          * the name parts here.
 720                          */
 721
 722                         while (start) {
 723                                 sz = strcspn(start, " ,");
 724                                 if ('\0' == start[(int)sz])
 725                                         break;
 726
 727                                 dbt_init(key, ksz);
 728                                 dbt_appendb(key, ksz, start, sz);
 729                                 dbt_appendb(key, ksz, &nil, 1);
 730
 731                                 dbt_put(db, dbn, key, val);
 732
 733                                 if (' ' == start[(int)sz])
 734                                         break;
 735
 736                                 assert(',' == start[(int)sz]);
 737                                 start += (int)sz + 1;
 738                                 while (' ' == *start)
 739                                         start++;
 740                         }
 741
 742                         return(1);
 743                 }
 744         }
 745
 746         if (pman_node(db, dbn, key, ksz, val, n->child))
 747                 return(1);
 748         if (pman_node(db, dbn, key, ksz, val, n->next))
 749                 return(1);
 750
 751         return(0);
 752 }
 753
 754 static void
 755 pman(DB *db, const char *dbn, DBT *key,
 756                 size_t *ksz, DBT *val, struct man *m)
 757 {
 758
 759         pman_node(db, dbn, key, ksz, val, man_node(m));
 760 }
 761
 762
 763 static void
 764 pmdoc(DB *db, const char *dbn, DBT *key,
 765                 size_t *ksz, DBT *val, struct mdoc *m)
 766 {
 767
 768         pmdoc_node(db, dbn, key, ksz, val, mdoc_node(m));
 769 }
 770
 771 static void
 772 usage(void)
 773 {
 774
 775         fprintf(stderr, "usage: %s "
 776                         "[-d path] "
 777                         "[file...]\n",
 778                         progname);
 779 }