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[mandoc.git] / mandocdb.c
1 /* $Id: mandocdb.c,v 1.121 2014/03/23 12:26:58 schwarze Exp $ */
2 /*
3 * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2011, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18 #ifdef HAVE_CONFIG_H
19 #include "config.h"
20 #endif
21
22 #include <sys/stat.h>
23 #include <sys/wait.h>
24
25 #include <assert.h>
26 #include <ctype.h>
27 #include <errno.h>
28 #include <fcntl.h>
29 #include <fts.h>
30 #include <getopt.h>
31 #include <limits.h>
32 #include <stddef.h>
33 #include <stdio.h>
34 #include <stdint.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38
39 #ifdef HAVE_OHASH
40 #include <ohash.h>
41 #else
42 #include "compat_ohash.h"
43 #endif
44 #include <sqlite3.h>
45
46 #include "mdoc.h"
47 #include "man.h"
48 #include "mandoc.h"
49 #include "mandoc_aux.h"
50 #include "manpath.h"
51 #include "mansearch.h"
52
53 extern int mansearch_keymax;
54 extern const char *const mansearch_keynames[];
55
56 #define SQL_EXEC(_v) \
57 if (SQLITE_OK != sqlite3_exec(db, (_v), NULL, NULL, NULL)) \
58 fprintf(stderr, "%s\n", sqlite3_errmsg(db))
59 #define SQL_BIND_TEXT(_s, _i, _v) \
60 if (SQLITE_OK != sqlite3_bind_text \
61 ((_s), (_i)++, (_v), -1, SQLITE_STATIC)) \
62 fprintf(stderr, "%s\n", sqlite3_errmsg(db))
63 #define SQL_BIND_INT(_s, _i, _v) \
64 if (SQLITE_OK != sqlite3_bind_int \
65 ((_s), (_i)++, (_v))) \
66 fprintf(stderr, "%s\n", sqlite3_errmsg(db))
67 #define SQL_BIND_INT64(_s, _i, _v) \
68 if (SQLITE_OK != sqlite3_bind_int64 \
69 ((_s), (_i)++, (_v))) \
70 fprintf(stderr, "%s\n", sqlite3_errmsg(db))
71 #define SQL_STEP(_s) \
72 if (SQLITE_DONE != sqlite3_step((_s))) \
73 fprintf(stderr, "%s\n", sqlite3_errmsg(db))
74
75 enum op {
76 OP_DEFAULT = 0, /* new dbs from dir list or default config */
77 OP_CONFFILE, /* new databases from custom config file */
78 OP_UPDATE, /* delete/add entries in existing database */
79 OP_DELETE, /* delete entries from existing database */
80 OP_TEST /* change no databases, report potential problems */
81 };
82
83 enum form {
84 FORM_NONE, /* format is unknown */
85 FORM_SRC, /* format is -man or -mdoc */
86 FORM_CAT /* format is cat */
87 };
88
89 struct str {
90 char *rendered; /* key in UTF-8 or ASCII form */
91 const struct mpage *mpage; /* if set, the owning parse */
92 uint64_t mask; /* bitmask in sequence */
93 char key[]; /* may contain escape sequences */
94 };
95
96 struct inodev {
97 ino_t st_ino;
98 dev_t st_dev;
99 };
100
101 struct mpage {
102 struct inodev inodev; /* used for hashing routine */
103 int64_t recno; /* id in mpages SQL table */
104 enum form form; /* format from file content */
105 char *sec; /* section from file content */
106 char *arch; /* architecture from file content */
107 char *title; /* title from file content */
108 char *desc; /* description from file content */
109 struct mlink *mlinks; /* singly linked list */
110 };
111
112 struct mlink {
113 char file[PATH_MAX]; /* filename rel. to manpath */
114 enum form dform; /* format from directory */
115 enum form fform; /* format from file name suffix */
116 char *dsec; /* section from directory */
117 char *arch; /* architecture from directory */
118 char *name; /* name from file name (not empty) */
119 char *fsec; /* section from file name suffix */
120 struct mlink *next; /* singly linked list */
121 struct mpage *mpage; /* parent */
122 };
123
124 enum stmt {
125 STMT_DELETE_PAGE = 0, /* delete mpage */
126 STMT_INSERT_PAGE, /* insert mpage */
127 STMT_INSERT_LINK, /* insert mlink */
128 STMT_INSERT_KEY, /* insert parsed key */
129 STMT__MAX
130 };
131
132 typedef int (*mdoc_fp)(struct mpage *, const struct mdoc_node *);
133
134 struct mdoc_handler {
135 mdoc_fp fp; /* optional handler */
136 uint64_t mask; /* set unless handler returns 0 */
137 };
138
139 static void dbclose(int);
140 static void dbadd(struct mpage *, struct mchars *);
141 static void dbadd_mlink(const struct mlink *mlink);
142 static int dbopen(int);
143 static void dbprune(void);
144 static void filescan(const char *);
145 static void *hash_alloc(size_t, void *);
146 static void hash_free(void *, size_t, void *);
147 static void *hash_halloc(size_t, void *);
148 static void mlink_add(struct mlink *, const struct stat *);
149 static int mlink_check(struct mpage *, struct mlink *);
150 static void mlink_free(struct mlink *);
151 static void mlinks_undupe(struct mpage *);
152 static void mpages_free(void);
153 static void mpages_merge(struct mchars *, struct mparse *);
154 static void parse_cat(struct mpage *);
155 static void parse_man(struct mpage *, const struct man_node *);
156 static void parse_mdoc(struct mpage *, const struct mdoc_node *);
157 static int parse_mdoc_body(struct mpage *, const struct mdoc_node *);
158 static int parse_mdoc_head(struct mpage *, const struct mdoc_node *);
159 static int parse_mdoc_Fd(struct mpage *, const struct mdoc_node *);
160 static int parse_mdoc_Fn(struct mpage *, const struct mdoc_node *);
161 static int parse_mdoc_Nd(struct mpage *, const struct mdoc_node *);
162 static int parse_mdoc_Nm(struct mpage *, const struct mdoc_node *);
163 static int parse_mdoc_Sh(struct mpage *, const struct mdoc_node *);
164 static int parse_mdoc_Xr(struct mpage *, const struct mdoc_node *);
165 static void putkey(const struct mpage *, char *, uint64_t);
166 static void putkeys(const struct mpage *,
167 const char *, size_t, uint64_t);
168 static void putmdockey(const struct mpage *,
169 const struct mdoc_node *, uint64_t);
170 static void render_key(struct mchars *, struct str *);
171 static void say(const char *, const char *, ...);
172 static int set_basedir(const char *);
173 static int treescan(void);
174 static size_t utf8(unsigned int, char [7]);
175
176 static char tempfilename[32];
177 static char *progname;
178 static int nodb; /* no database changes */
179 static int mparse_options; /* abort the parse early */
180 static int use_all; /* use all found files */
181 static int verb; /* print what we're doing */
182 static int warnings; /* warn about crap */
183 static int write_utf8; /* write UTF-8 output; else ASCII */
184 static int exitcode; /* to be returned by main */
185 static enum op op; /* operational mode */
186 static char basedir[PATH_MAX]; /* current base directory */
187 static struct ohash mpages; /* table of distinct manual pages */
188 static struct ohash mlinks; /* table of directory entries */
189 static struct ohash strings; /* table of all strings */
190 static sqlite3 *db = NULL; /* current database */
191 static sqlite3_stmt *stmts[STMT__MAX]; /* current statements */
192
193 static const struct mdoc_handler mdocs[MDOC_MAX] = {
194 { NULL, 0 }, /* Ap */
195 { NULL, 0 }, /* Dd */
196 { NULL, 0 }, /* Dt */
197 { NULL, 0 }, /* Os */
198 { parse_mdoc_Sh, TYPE_Sh }, /* Sh */
199 { parse_mdoc_head, TYPE_Ss }, /* Ss */
200 { NULL, 0 }, /* Pp */
201 { NULL, 0 }, /* D1 */
202 { NULL, 0 }, /* Dl */
203 { NULL, 0 }, /* Bd */
204 { NULL, 0 }, /* Ed */
205 { NULL, 0 }, /* Bl */
206 { NULL, 0 }, /* El */
207 { NULL, 0 }, /* It */
208 { NULL, 0 }, /* Ad */
209 { NULL, TYPE_An }, /* An */
210 { NULL, TYPE_Ar }, /* Ar */
211 { NULL, TYPE_Cd }, /* Cd */
212 { NULL, TYPE_Cm }, /* Cm */
213 { NULL, TYPE_Dv }, /* Dv */
214 { NULL, TYPE_Er }, /* Er */
215 { NULL, TYPE_Ev }, /* Ev */
216 { NULL, 0 }, /* Ex */
217 { NULL, TYPE_Fa }, /* Fa */
218 { parse_mdoc_Fd, 0 }, /* Fd */
219 { NULL, TYPE_Fl }, /* Fl */
220 { parse_mdoc_Fn, 0 }, /* Fn */
221 { NULL, TYPE_Ft }, /* Ft */
222 { NULL, TYPE_Ic }, /* Ic */
223 { NULL, TYPE_In }, /* In */
224 { NULL, TYPE_Li }, /* Li */
225 { parse_mdoc_Nd, TYPE_Nd }, /* Nd */
226 { parse_mdoc_Nm, TYPE_Nm }, /* Nm */
227 { NULL, 0 }, /* Op */
228 { NULL, 0 }, /* Ot */
229 { NULL, TYPE_Pa }, /* Pa */
230 { NULL, 0 }, /* Rv */
231 { NULL, TYPE_St }, /* St */
232 { NULL, TYPE_Va }, /* Va */
233 { parse_mdoc_body, TYPE_Va }, /* Vt */
234 { parse_mdoc_Xr, 0 }, /* Xr */
235 { NULL, 0 }, /* %A */
236 { NULL, 0 }, /* %B */
237 { NULL, 0 }, /* %D */
238 { NULL, 0 }, /* %I */
239 { NULL, 0 }, /* %J */
240 { NULL, 0 }, /* %N */
241 { NULL, 0 }, /* %O */
242 { NULL, 0 }, /* %P */
243 { NULL, 0 }, /* %R */
244 { NULL, 0 }, /* %T */
245 { NULL, 0 }, /* %V */
246 { NULL, 0 }, /* Ac */
247 { NULL, 0 }, /* Ao */
248 { NULL, 0 }, /* Aq */
249 { NULL, TYPE_At }, /* At */
250 { NULL, 0 }, /* Bc */
251 { NULL, 0 }, /* Bf */
252 { NULL, 0 }, /* Bo */
253 { NULL, 0 }, /* Bq */
254 { NULL, TYPE_Bsx }, /* Bsx */
255 { NULL, TYPE_Bx }, /* Bx */
256 { NULL, 0 }, /* Db */
257 { NULL, 0 }, /* Dc */
258 { NULL, 0 }, /* Do */
259 { NULL, 0 }, /* Dq */
260 { NULL, 0 }, /* Ec */
261 { NULL, 0 }, /* Ef */
262 { NULL, TYPE_Em }, /* Em */
263 { NULL, 0 }, /* Eo */
264 { NULL, TYPE_Fx }, /* Fx */
265 { NULL, TYPE_Ms }, /* Ms */
266 { NULL, 0 }, /* No */
267 { NULL, 0 }, /* Ns */
268 { NULL, TYPE_Nx }, /* Nx */
269 { NULL, TYPE_Ox }, /* Ox */
270 { NULL, 0 }, /* Pc */
271 { NULL, 0 }, /* Pf */
272 { NULL, 0 }, /* Po */
273 { NULL, 0 }, /* Pq */
274 { NULL, 0 }, /* Qc */
275 { NULL, 0 }, /* Ql */
276 { NULL, 0 }, /* Qo */
277 { NULL, 0 }, /* Qq */
278 { NULL, 0 }, /* Re */
279 { NULL, 0 }, /* Rs */
280 { NULL, 0 }, /* Sc */
281 { NULL, 0 }, /* So */
282 { NULL, 0 }, /* Sq */
283 { NULL, 0 }, /* Sm */
284 { NULL, 0 }, /* Sx */
285 { NULL, TYPE_Sy }, /* Sy */
286 { NULL, TYPE_Tn }, /* Tn */
287 { NULL, 0 }, /* Ux */
288 { NULL, 0 }, /* Xc */
289 { NULL, 0 }, /* Xo */
290 { parse_mdoc_head, 0 }, /* Fo */
291 { NULL, 0 }, /* Fc */
292 { NULL, 0 }, /* Oo */
293 { NULL, 0 }, /* Oc */
294 { NULL, 0 }, /* Bk */
295 { NULL, 0 }, /* Ek */
296 { NULL, 0 }, /* Bt */
297 { NULL, 0 }, /* Hf */
298 { NULL, 0 }, /* Fr */
299 { NULL, 0 }, /* Ud */
300 { NULL, TYPE_Lb }, /* Lb */
301 { NULL, 0 }, /* Lp */
302 { NULL, TYPE_Lk }, /* Lk */
303 { NULL, TYPE_Mt }, /* Mt */
304 { NULL, 0 }, /* Brq */
305 { NULL, 0 }, /* Bro */
306 { NULL, 0 }, /* Brc */
307 { NULL, 0 }, /* %C */
308 { NULL, 0 }, /* Es */
309 { NULL, 0 }, /* En */
310 { NULL, TYPE_Dx }, /* Dx */
311 { NULL, 0 }, /* %Q */
312 { NULL, 0 }, /* br */
313 { NULL, 0 }, /* sp */
314 { NULL, 0 }, /* %U */
315 { NULL, 0 }, /* Ta */
316 };
317
318 int
319 main(int argc, char *argv[])
320 {
321 int ch, i;
322 size_t j, sz;
323 const char *path_arg;
324 struct mchars *mc;
325 struct manpaths dirs;
326 struct mparse *mp;
327 struct ohash_info mpages_info, mlinks_info;
328
329 memset(stmts, 0, STMT__MAX * sizeof(sqlite3_stmt *));
330 memset(&dirs, 0, sizeof(struct manpaths));
331
332 mpages_info.alloc = mlinks_info.alloc = hash_alloc;
333 mpages_info.halloc = mlinks_info.halloc = hash_halloc;
334 mpages_info.hfree = mlinks_info.hfree = hash_free;
335
336 mpages_info.key_offset = offsetof(struct mpage, inodev);
337 mlinks_info.key_offset = offsetof(struct mlink, file);
338
339 progname = strrchr(argv[0], '/');
340 if (progname == NULL)
341 progname = argv[0];
342 else
343 ++progname;
344
345 /*
346 * We accept a few different invocations.
347 * The CHECKOP macro makes sure that invocation styles don't
348 * clobber each other.
349 */
350 #define CHECKOP(_op, _ch) do \
351 if (OP_DEFAULT != (_op)) { \
352 fprintf(stderr, "-%c: Conflicting option\n", (_ch)); \
353 goto usage; \
354 } while (/*CONSTCOND*/0)
355
356 path_arg = NULL;
357 op = OP_DEFAULT;
358
359 while (-1 != (ch = getopt(argc, argv, "aC:d:nQT:tu:vW")))
360 switch (ch) {
361 case ('a'):
362 use_all = 1;
363 break;
364 case ('C'):
365 CHECKOP(op, ch);
366 path_arg = optarg;
367 op = OP_CONFFILE;
368 break;
369 case ('d'):
370 CHECKOP(op, ch);
371 path_arg = optarg;
372 op = OP_UPDATE;
373 break;
374 case ('n'):
375 nodb = 1;
376 break;
377 case ('Q'):
378 mparse_options |= MPARSE_QUICK;
379 break;
380 case ('T'):
381 if (strcmp(optarg, "utf8")) {
382 fprintf(stderr, "-T%s: Unsupported "
383 "output format\n", optarg);
384 goto usage;
385 }
386 write_utf8 = 1;
387 break;
388 case ('t'):
389 CHECKOP(op, ch);
390 dup2(STDOUT_FILENO, STDERR_FILENO);
391 op = OP_TEST;
392 nodb = warnings = 1;
393 break;
394 case ('u'):
395 CHECKOP(op, ch);
396 path_arg = optarg;
397 op = OP_DELETE;
398 break;
399 case ('v'):
400 verb++;
401 break;
402 case ('W'):
403 warnings = 1;
404 break;
405 default:
406 goto usage;
407 }
408
409 argc -= optind;
410 argv += optind;
411
412 if (OP_CONFFILE == op && argc > 0) {
413 fprintf(stderr, "-C: Too many arguments\n");
414 goto usage;
415 }
416
417 exitcode = (int)MANDOCLEVEL_OK;
418 mp = mparse_alloc(mparse_options, MANDOCLEVEL_FATAL, NULL, NULL);
419 mc = mchars_alloc();
420
421 ohash_init(&mpages, 6, &mpages_info);
422 ohash_init(&mlinks, 6, &mlinks_info);
423
424 if (OP_UPDATE == op || OP_DELETE == op || OP_TEST == op) {
425 /*
426 * Force processing all files.
427 */
428 use_all = 1;
429
430 /*
431 * All of these deal with a specific directory.
432 * Jump into that directory then collect files specified
433 * on the command-line.
434 */
435 if (0 == set_basedir(path_arg))
436 goto out;
437 for (i = 0; i < argc; i++)
438 filescan(argv[i]);
439 if (0 == dbopen(1))
440 goto out;
441 if (OP_TEST != op)
442 dbprune();
443 if (OP_DELETE != op)
444 mpages_merge(mc, mp);
445 dbclose(1);
446 } else {
447 /*
448 * If we have arguments, use them as our manpaths.
449 * If we don't, grok from manpath(1) or however else
450 * manpath_parse() wants to do it.
451 */
452 if (argc > 0) {
453 dirs.paths = mandoc_calloc
454 (argc, sizeof(char *));
455 dirs.sz = (size_t)argc;
456 for (i = 0; i < argc; i++)
457 dirs.paths[i] = mandoc_strdup(argv[i]);
458 } else
459 manpath_parse(&dirs, path_arg, NULL, NULL);
460
461 /*
462 * First scan the tree rooted at a base directory, then
463 * build a new database and finally move it into place.
464 * Ignore zero-length directories and strip trailing
465 * slashes.
466 */
467 for (j = 0; j < dirs.sz; j++) {
468 sz = strlen(dirs.paths[j]);
469 if (sz && '/' == dirs.paths[j][sz - 1])
470 dirs.paths[j][--sz] = '\0';
471 if (0 == sz)
472 continue;
473
474 if (j) {
475 ohash_init(&mpages, 6, &mpages_info);
476 ohash_init(&mlinks, 6, &mlinks_info);
477 }
478
479 if (0 == set_basedir(dirs.paths[j]))
480 goto out;
481 if (0 == treescan())
482 goto out;
483 if (0 == set_basedir(dirs.paths[j]))
484 goto out;
485 if (0 == dbopen(0))
486 goto out;
487
488 mpages_merge(mc, mp);
489 dbclose(0);
490
491 if (j + 1 < dirs.sz) {
492 mpages_free();
493 ohash_delete(&mpages);
494 ohash_delete(&mlinks);
495 }
496 }
497 }
498 out:
499 set_basedir(NULL);
500 manpath_free(&dirs);
501 mchars_free(mc);
502 mparse_free(mp);
503 mpages_free();
504 ohash_delete(&mpages);
505 ohash_delete(&mlinks);
506 return(exitcode);
507 usage:
508 fprintf(stderr, "usage: %s [-anQvW] [-C file] [-Tutf8]\n"
509 " %s [-anQvW] [-Tutf8] dir ...\n"
510 " %s [-nQvW] [-Tutf8] -d dir [file ...]\n"
511 " %s [-nvW] -u dir [file ...]\n"
512 " %s [-Q] -t file ...\n",
513 progname, progname, progname,
514 progname, progname);
515
516 return((int)MANDOCLEVEL_BADARG);
517 }
518
519 /*
520 * Scan a directory tree rooted at "basedir" for manpages.
521 * We use fts(), scanning directory parts along the way for clues to our
522 * section and architecture.
523 *
524 * If use_all has been specified, grok all files.
525 * If not, sanitise paths to the following:
526 *
527 * [./]man*[/<arch>]/<name>.<section>
528 * or
529 * [./]cat<section>[/<arch>]/<name>.0
530 *
531 * TODO: accomodate for multi-language directories.
532 */
533 static int
534 treescan(void)
535 {
536 FTS *f;
537 FTSENT *ff;
538 struct mlink *mlink;
539 int dform;
540 char *dsec, *arch, *fsec, *cp;
541 const char *path;
542 const char *argv[2];
543
544 argv[0] = ".";
545 argv[1] = (char *)NULL;
546
547 /*
548 * Walk through all components under the directory, using the
549 * logical descent of files.
550 */
551 f = fts_open((char * const *)argv, FTS_LOGICAL, NULL);
552 if (NULL == f) {
553 exitcode = (int)MANDOCLEVEL_SYSERR;
554 say("", NULL);
555 return(0);
556 }
557
558 dsec = arch = NULL;
559 dform = FORM_NONE;
560
561 while (NULL != (ff = fts_read(f))) {
562 path = ff->fts_path + 2;
563 /*
564 * If we're a regular file, add an mlink by using the
565 * stored directory data and handling the filename.
566 */
567 if (FTS_F == ff->fts_info) {
568 if (0 == strcmp(path, MANDOC_DB))
569 continue;
570 if ( ! use_all && ff->fts_level < 2) {
571 if (warnings)
572 say(path, "Extraneous file");
573 continue;
574 } else if (NULL == (fsec =
575 strrchr(ff->fts_name, '.'))) {
576 if ( ! use_all) {
577 if (warnings)
578 say(path,
579 "No filename suffix");
580 continue;
581 }
582 } else if (0 == strcmp(++fsec, "html")) {
583 if (warnings)
584 say(path, "Skip html");
585 continue;
586 } else if (0 == strcmp(fsec, "gz")) {
587 if (warnings)
588 say(path, "Skip gz");
589 continue;
590 } else if (0 == strcmp(fsec, "ps")) {
591 if (warnings)
592 say(path, "Skip ps");
593 continue;
594 } else if (0 == strcmp(fsec, "pdf")) {
595 if (warnings)
596 say(path, "Skip pdf");
597 continue;
598 } else if ( ! use_all &&
599 ((FORM_SRC == dform && strcmp(fsec, dsec)) ||
600 (FORM_CAT == dform && strcmp(fsec, "0")))) {
601 if (warnings)
602 say(path, "Wrong filename suffix");
603 continue;
604 } else
605 fsec[-1] = '\0';
606
607 mlink = mandoc_calloc(1, sizeof(struct mlink));
608 strlcpy(mlink->file, path, sizeof(mlink->file));
609 mlink->dform = dform;
610 mlink->dsec = dsec;
611 mlink->arch = arch;
612 mlink->name = ff->fts_name;
613 mlink->fsec = fsec;
614 mlink_add(mlink, ff->fts_statp);
615 continue;
616 } else if (FTS_D != ff->fts_info &&
617 FTS_DP != ff->fts_info) {
618 if (warnings)
619 say(path, "Not a regular file");
620 continue;
621 }
622
623 switch (ff->fts_level) {
624 case (0):
625 /* Ignore the root directory. */
626 break;
627 case (1):
628 /*
629 * This might contain manX/ or catX/.
630 * Try to infer this from the name.
631 * If we're not in use_all, enforce it.
632 */
633 cp = ff->fts_name;
634 if (FTS_DP == ff->fts_info)
635 break;
636
637 if (0 == strncmp(cp, "man", 3)) {
638 dform = FORM_SRC;
639 dsec = cp + 3;
640 } else if (0 == strncmp(cp, "cat", 3)) {
641 dform = FORM_CAT;
642 dsec = cp + 3;
643 } else {
644 dform = FORM_NONE;
645 dsec = NULL;
646 }
647
648 if (NULL != dsec || use_all)
649 break;
650
651 if (warnings)
652 say(path, "Unknown directory part");
653 fts_set(f, ff, FTS_SKIP);
654 break;
655 case (2):
656 /*
657 * Possibly our architecture.
658 * If we're descending, keep tabs on it.
659 */
660 if (FTS_DP != ff->fts_info && NULL != dsec)
661 arch = ff->fts_name;
662 else
663 arch = NULL;
664 break;
665 default:
666 if (FTS_DP == ff->fts_info || use_all)
667 break;
668 if (warnings)
669 say(path, "Extraneous directory part");
670 fts_set(f, ff, FTS_SKIP);
671 break;
672 }
673 }
674
675 fts_close(f);
676 return(1);
677 }
678
679 /*
680 * Add a file to the mlinks table.
681 * Do not verify that it's a "valid" looking manpage (we'll do that
682 * later).
683 *
684 * Try to infer the manual section, architecture, and page name from the
685 * path, assuming it looks like
686 *
687 * [./]man*[/<arch>]/<name>.<section>
688 * or
689 * [./]cat<section>[/<arch>]/<name>.0
690 *
691 * See treescan() for the fts(3) version of this.
692 */
693 static void
694 filescan(const char *file)
695 {
696 char buf[PATH_MAX];
697 struct stat st;
698 struct mlink *mlink;
699 char *p, *start;
700
701 assert(use_all);
702
703 if (0 == strncmp(file, "./", 2))
704 file += 2;
705
706 if (NULL == realpath(file, buf)) {
707 exitcode = (int)MANDOCLEVEL_BADARG;
708 say(file, NULL);
709 return;
710 }
711
712 if (strstr(buf, basedir) == buf)
713 start = buf + strlen(basedir) + 1;
714 else if (OP_TEST == op)
715 start = buf;
716 else {
717 exitcode = (int)MANDOCLEVEL_BADARG;
718 say("", "%s: outside base directory", buf);
719 return;
720 }
721
722 if (-1 == stat(buf, &st)) {
723 exitcode = (int)MANDOCLEVEL_BADARG;
724 say(file, NULL);
725 return;
726 } else if ( ! (S_IFREG & st.st_mode)) {
727 exitcode = (int)MANDOCLEVEL_BADARG;
728 say(file, "Not a regular file");
729 return;
730 }
731
732 mlink = mandoc_calloc(1, sizeof(struct mlink));
733 strlcpy(mlink->file, start, sizeof(mlink->file));
734
735 /*
736 * First try to guess our directory structure.
737 * If we find a separator, try to look for man* or cat*.
738 * If we find one of these and what's underneath is a directory,
739 * assume it's an architecture.
740 */
741 if (NULL != (p = strchr(start, '/'))) {
742 *p++ = '\0';
743 if (0 == strncmp(start, "man", 3)) {
744 mlink->dform = FORM_SRC;
745 mlink->dsec = start + 3;
746 } else if (0 == strncmp(start, "cat", 3)) {
747 mlink->dform = FORM_CAT;
748 mlink->dsec = start + 3;
749 }
750
751 start = p;
752 if (NULL != mlink->dsec && NULL != (p = strchr(start, '/'))) {
753 *p++ = '\0';
754 mlink->arch = start;
755 start = p;
756 }
757 }
758
759 /*
760 * Now check the file suffix.
761 * Suffix of `.0' indicates a catpage, `.1-9' is a manpage.
762 */
763 p = strrchr(start, '\0');
764 while (p-- > start && '/' != *p && '.' != *p)
765 /* Loop. */ ;
766
767 if ('.' == *p) {
768 *p++ = '\0';
769 mlink->fsec = p;
770 }
771
772 /*
773 * Now try to parse the name.
774 * Use the filename portion of the path.
775 */
776 mlink->name = start;
777 if (NULL != (p = strrchr(start, '/'))) {
778 mlink->name = p + 1;
779 *p = '\0';
780 }
781 mlink_add(mlink, &st);
782 }
783
784 static void
785 mlink_add(struct mlink *mlink, const struct stat *st)
786 {
787 struct inodev inodev;
788 struct mpage *mpage;
789 unsigned int slot;
790
791 assert(NULL != mlink->file);
792
793 mlink->dsec = mandoc_strdup(mlink->dsec ? mlink->dsec : "");
794 mlink->arch = mandoc_strdup(mlink->arch ? mlink->arch : "");
795 mlink->name = mandoc_strdup(mlink->name ? mlink->name : "");
796 mlink->fsec = mandoc_strdup(mlink->fsec ? mlink->fsec : "");
797
798 if ('0' == *mlink->fsec) {
799 free(mlink->fsec);
800 mlink->fsec = mandoc_strdup(mlink->dsec);
801 mlink->fform = FORM_CAT;
802 } else if ('1' <= *mlink->fsec && '9' >= *mlink->fsec)
803 mlink->fform = FORM_SRC;
804 else
805 mlink->fform = FORM_NONE;
806
807 slot = ohash_qlookup(&mlinks, mlink->file);
808 assert(NULL == ohash_find(&mlinks, slot));
809 ohash_insert(&mlinks, slot, mlink);
810
811 inodev.st_ino = st->st_ino;
812 inodev.st_dev = st->st_dev;
813 slot = ohash_lookup_memory(&mpages, (char *)&inodev,
814 sizeof(struct inodev), inodev.st_ino);
815 mpage = ohash_find(&mpages, slot);
816 if (NULL == mpage) {
817 mpage = mandoc_calloc(1, sizeof(struct mpage));
818 mpage->inodev.st_ino = inodev.st_ino;
819 mpage->inodev.st_dev = inodev.st_dev;
820 ohash_insert(&mpages, slot, mpage);
821 } else
822 mlink->next = mpage->mlinks;
823 mpage->mlinks = mlink;
824 mlink->mpage = mpage;
825 }
826
827 static void
828 mlink_free(struct mlink *mlink)
829 {
830
831 free(mlink->dsec);
832 free(mlink->arch);
833 free(mlink->name);
834 free(mlink->fsec);
835 free(mlink);
836 }
837
838 static void
839 mpages_free(void)
840 {
841 struct mpage *mpage;
842 struct mlink *mlink;
843 unsigned int slot;
844
845 mpage = ohash_first(&mpages, &slot);
846 while (NULL != mpage) {
847 while (NULL != (mlink = mpage->mlinks)) {
848 mpage->mlinks = mlink->next;
849 mlink_free(mlink);
850 }
851 free(mpage->sec);
852 free(mpage->arch);
853 free(mpage->title);
854 free(mpage->desc);
855 free(mpage);
856 mpage = ohash_next(&mpages, &slot);
857 }
858 }
859
860 /*
861 * For each mlink to the mpage, check whether the path looks like
862 * it is formatted, and if it does, check whether a source manual
863 * exists by the same name, ignoring the suffix.
864 * If both conditions hold, drop the mlink.
865 */
866 static void
867 mlinks_undupe(struct mpage *mpage)
868 {
869 char buf[PATH_MAX];
870 struct mlink **prev;
871 struct mlink *mlink;
872 char *bufp;
873
874 mpage->form = FORM_CAT;
875 prev = &mpage->mlinks;
876 while (NULL != (mlink = *prev)) {
877 if (FORM_CAT != mlink->dform) {
878 mpage->form = FORM_NONE;
879 goto nextlink;
880 }
881 if (strlcpy(buf, mlink->file, PATH_MAX) >= PATH_MAX) {
882 if (warnings)
883 say(mlink->file, "Filename too long");
884 goto nextlink;
885 }
886 bufp = strstr(buf, "cat");
887 assert(NULL != bufp);
888 memcpy(bufp, "man", 3);
889 if (NULL != (bufp = strrchr(buf, '.')))
890 *++bufp = '\0';
891 strlcat(buf, mlink->dsec, PATH_MAX);
892 if (NULL == ohash_find(&mlinks,
893 ohash_qlookup(&mlinks, buf)))
894 goto nextlink;
895 if (warnings)
896 say(mlink->file, "Man source exists: %s", buf);
897 if (use_all)
898 goto nextlink;
899 *prev = mlink->next;
900 mlink_free(mlink);
901 continue;
902 nextlink:
903 prev = &(*prev)->next;
904 }
905 }
906
907 static int
908 mlink_check(struct mpage *mpage, struct mlink *mlink)
909 {
910 int match;
911
912 match = 1;
913
914 /*
915 * Check whether the manual section given in a file
916 * agrees with the directory where the file is located.
917 * Some manuals have suffixes like (3p) on their
918 * section number either inside the file or in the
919 * directory name, some are linked into more than one
920 * section, like encrypt(1) = makekey(8).
921 */
922
923 if (FORM_SRC == mpage->form &&
924 strcasecmp(mpage->sec, mlink->dsec)) {
925 match = 0;
926 say(mlink->file, "Section \"%s\" manual in %s directory",
927 mpage->sec, mlink->dsec);
928 }
929
930 /*
931 * Manual page directories exist for each kernel
932 * architecture as returned by machine(1).
933 * However, many manuals only depend on the
934 * application architecture as returned by arch(1).
935 * For example, some (2/ARM) manuals are shared
936 * across the "armish" and "zaurus" kernel
937 * architectures.
938 * A few manuals are even shared across completely
939 * different architectures, for example fdformat(1)
940 * on amd64, i386, sparc, and sparc64.
941 */
942
943 if (strcasecmp(mpage->arch, mlink->arch)) {
944 match = 0;
945 say(mlink->file, "Architecture \"%s\" manual in "
946 "\"%s\" directory", mpage->arch, mlink->arch);
947 }
948
949 if (strcasecmp(mpage->title, mlink->name))
950 match = 0;
951
952 return(match);
953 }
954
955 /*
956 * Run through the files in the global vector "mpages"
957 * and add them to the database specified in "basedir".
958 *
959 * This handles the parsing scheme itself, using the cues of directory
960 * and filename to determine whether the file is parsable or not.
961 */
962 static void
963 mpages_merge(struct mchars *mc, struct mparse *mp)
964 {
965 char any[] = "any";
966 struct ohash_info str_info;
967 struct mpage *mpage, *mpage_dest;
968 struct mlink *mlink, *mlink_dest;
969 struct mdoc *mdoc;
970 struct man *man;
971 char *sodest;
972 char *cp;
973 int match;
974 unsigned int pslot;
975 enum mandoclevel lvl;
976
977 str_info.alloc = hash_alloc;
978 str_info.halloc = hash_halloc;
979 str_info.hfree = hash_free;
980 str_info.key_offset = offsetof(struct str, key);
981
982 if (0 == nodb)
983 SQL_EXEC("BEGIN TRANSACTION");
984
985 mpage = ohash_first(&mpages, &pslot);
986 while (NULL != mpage) {
987 mlinks_undupe(mpage);
988 if (NULL == mpage->mlinks) {
989 mpage = ohash_next(&mpages, &pslot);
990 continue;
991 }
992
993 ohash_init(&strings, 6, &str_info);
994 mparse_reset(mp);
995 mdoc = NULL;
996 man = NULL;
997
998 /*
999 * Try interpreting the file as mdoc(7) or man(7)
1000 * source code, unless it is already known to be
1001 * formatted. Fall back to formatted mode.
1002 */
1003 if (FORM_CAT != mpage->mlinks->dform ||
1004 FORM_CAT != mpage->mlinks->fform) {
1005 lvl = mparse_readfd(mp, -1, mpage->mlinks->file);
1006 if (lvl < MANDOCLEVEL_FATAL)
1007 mparse_result(mp, &mdoc, &man, &sodest);
1008 }
1009
1010 if (NULL != sodest) {
1011 mlink_dest = ohash_find(&mlinks,
1012 ohash_qlookup(&mlinks, sodest));
1013 if (NULL != mlink_dest) {
1014
1015 /* The .so target exists. */
1016
1017 mpage_dest = mlink_dest->mpage;
1018 mlink = mpage->mlinks;
1019 while (1) {
1020 mlink->mpage = mpage_dest;
1021
1022 /*
1023 * If the target was already
1024 * processed, add the links
1025 * to the database now.
1026 * Otherwise, this will
1027 * happen when we come
1028 * to the target.
1029 */
1030
1031 if (mpage_dest->recno)
1032 dbadd_mlink(mlink);
1033
1034 if (NULL == mlink->next)
1035 break;
1036 mlink = mlink->next;
1037 }
1038
1039 /* Move all links to the target. */
1040
1041 mlink->next = mlink_dest->next;
1042 mlink_dest->next = mpage->mlinks;
1043 mpage->mlinks = NULL;
1044 }
1045 ohash_delete(&strings);
1046 mpage = ohash_next(&mpages, &pslot);
1047 continue;
1048 } else if (NULL != mdoc) {
1049 mpage->form = FORM_SRC;
1050 mpage->sec =
1051 mandoc_strdup(mdoc_meta(mdoc)->msec);
1052 mpage->arch = mdoc_meta(mdoc)->arch;
1053 mpage->arch = mandoc_strdup(
1054 NULL == mpage->arch ? "" : mpage->arch);
1055 mpage->title =
1056 mandoc_strdup(mdoc_meta(mdoc)->title);
1057 } else if (NULL != man) {
1058 mpage->form = FORM_SRC;
1059 mpage->sec =
1060 mandoc_strdup(man_meta(man)->msec);
1061 mpage->arch =
1062 mandoc_strdup(mpage->mlinks->arch);
1063 mpage->title =
1064 mandoc_strdup(man_meta(man)->title);
1065 } else {
1066 mpage->form = FORM_CAT;
1067 mpage->sec =
1068 mandoc_strdup(mpage->mlinks->dsec);
1069 mpage->arch =
1070 mandoc_strdup(mpage->mlinks->arch);
1071 mpage->title =
1072 mandoc_strdup(mpage->mlinks->name);
1073 }
1074 putkey(mpage, mpage->sec, TYPE_sec);
1075 putkey(mpage, '\0' == *mpage->arch ?
1076 any : mpage->arch, TYPE_arch);
1077
1078 for (mlink = mpage->mlinks; mlink; mlink = mlink->next) {
1079 if ('\0' != *mlink->dsec)
1080 putkey(mpage, mlink->dsec, TYPE_sec);
1081 if ('\0' != *mlink->fsec)
1082 putkey(mpage, mlink->fsec, TYPE_sec);
1083 putkey(mpage, '\0' == *mlink->arch ?
1084 any : mlink->arch, TYPE_arch);
1085 putkey(mpage, mlink->name, TYPE_Nm);
1086 }
1087
1088 if (warnings && !use_all) {
1089 match = 0;
1090 for (mlink = mpage->mlinks; mlink;
1091 mlink = mlink->next)
1092 if (mlink_check(mpage, mlink))
1093 match = 1;
1094 } else
1095 match = 1;
1096
1097 if (NULL != mdoc) {
1098 if (NULL != (cp = mdoc_meta(mdoc)->name))
1099 putkey(mpage, cp, TYPE_Nm);
1100 assert(NULL == mpage->desc);
1101 parse_mdoc(mpage, mdoc_node(mdoc));
1102 putkey(mpage, NULL != mpage->desc ?
1103 mpage->desc : mpage->mlinks->name, TYPE_Nd);
1104 } else if (NULL != man)
1105 parse_man(mpage, man_node(man));
1106 else
1107 parse_cat(mpage);
1108
1109 dbadd(mpage, mc);
1110 ohash_delete(&strings);
1111 mpage = ohash_next(&mpages, &pslot);
1112 }
1113
1114 if (0 == nodb)
1115 SQL_EXEC("END TRANSACTION");
1116 }
1117
1118 static void
1119 parse_cat(struct mpage *mpage)
1120 {
1121 FILE *stream;
1122 char *line, *p, *title;
1123 size_t len, plen, titlesz;
1124
1125 if (NULL == (stream = fopen(mpage->mlinks->file, "r"))) {
1126 if (warnings)
1127 say(mpage->mlinks->file, NULL);
1128 return;
1129 }
1130
1131 /* Skip to first blank line. */
1132
1133 while (NULL != (line = fgetln(stream, &len)))
1134 if ('\n' == *line)
1135 break;
1136
1137 /*
1138 * Assume the first line that is not indented
1139 * is the first section header. Skip to it.
1140 */
1141
1142 while (NULL != (line = fgetln(stream, &len)))
1143 if ('\n' != *line && ' ' != *line)
1144 break;
1145
1146 /*
1147 * Read up until the next section into a buffer.
1148 * Strip the leading and trailing newline from each read line,
1149 * appending a trailing space.
1150 * Ignore empty (whitespace-only) lines.
1151 */
1152
1153 titlesz = 0;
1154 title = NULL;
1155
1156 while (NULL != (line = fgetln(stream, &len))) {
1157 if (' ' != *line || '\n' != line[len - 1])
1158 break;
1159 while (len > 0 && isspace((unsigned char)*line)) {
1160 line++;
1161 len--;
1162 }
1163 if (1 == len)
1164 continue;
1165 title = mandoc_realloc(title, titlesz + len);
1166 memcpy(title + titlesz, line, len);
1167 titlesz += len;
1168 title[titlesz - 1] = ' ';
1169 }
1170
1171 /*
1172 * If no page content can be found, or the input line
1173 * is already the next section header, or there is no
1174 * trailing newline, reuse the page title as the page
1175 * description.
1176 */
1177
1178 if (NULL == title || '\0' == *title) {
1179 if (warnings)
1180 say(mpage->mlinks->file,
1181 "Cannot find NAME section");
1182 assert(NULL == mpage->desc);
1183 mpage->desc = mandoc_strdup(mpage->mlinks->name);
1184 putkey(mpage, mpage->mlinks->name, TYPE_Nd);
1185 fclose(stream);
1186 free(title);
1187 return;
1188 }
1189
1190 title = mandoc_realloc(title, titlesz + 1);
1191 title[titlesz] = '\0';
1192
1193 /*
1194 * Skip to the first dash.
1195 * Use the remaining line as the description (no more than 70
1196 * bytes).
1197 */
1198
1199 if (NULL != (p = strstr(title, "- "))) {
1200 for (p += 2; ' ' == *p || '\b' == *p; p++)
1201 /* Skip to next word. */ ;
1202 } else {
1203 if (warnings)
1204 say(mpage->mlinks->file,
1205 "No dash in title line");
1206 p = title;
1207 }
1208
1209 plen = strlen(p);
1210
1211 /* Strip backspace-encoding from line. */
1212
1213 while (NULL != (line = memchr(p, '\b', plen))) {
1214 len = line - p;
1215 if (0 == len) {
1216 memmove(line, line + 1, plen--);
1217 continue;
1218 }
1219 memmove(line - 1, line + 1, plen - len);
1220 plen -= 2;
1221 }
1222
1223 assert(NULL == mpage->desc);
1224 mpage->desc = mandoc_strdup(p);
1225 putkey(mpage, mpage->desc, TYPE_Nd);
1226 fclose(stream);
1227 free(title);
1228 }
1229
1230 /*
1231 * Put a type/word pair into the word database for this particular file.
1232 */
1233 static void
1234 putkey(const struct mpage *mpage, char *value, uint64_t type)
1235 {
1236 char *cp;
1237
1238 assert(NULL != value);
1239 if (TYPE_arch == type)
1240 for (cp = value; *cp; cp++)
1241 if (isupper((unsigned char)*cp))
1242 *cp = _tolower((unsigned char)*cp);
1243 putkeys(mpage, value, strlen(value), type);
1244 }
1245
1246 /*
1247 * Grok all nodes at or below a certain mdoc node into putkey().
1248 */
1249 static void
1250 putmdockey(const struct mpage *mpage,
1251 const struct mdoc_node *n, uint64_t m)
1252 {
1253
1254 for ( ; NULL != n; n = n->next) {
1255 if (NULL != n->child)
1256 putmdockey(mpage, n->child, m);
1257 if (MDOC_TEXT == n->type)
1258 putkey(mpage, n->string, m);
1259 }
1260 }
1261
1262 static void
1263 parse_man(struct mpage *mpage, const struct man_node *n)
1264 {
1265 const struct man_node *head, *body;
1266 char *start, *title;
1267 char byte;
1268 size_t sz;
1269
1270 if (NULL == n)
1271 return;
1272
1273 /*
1274 * We're only searching for one thing: the first text child in
1275 * the BODY of a NAME section. Since we don't keep track of
1276 * sections in -man, run some hoops to find out whether we're in
1277 * the correct section or not.
1278 */
1279
1280 if (MAN_BODY == n->type && MAN_SH == n->tok) {
1281 body = n;
1282 assert(body->parent);
1283 if (NULL != (head = body->parent->head) &&
1284 1 == head->nchild &&
1285 NULL != (head = (head->child)) &&
1286 MAN_TEXT == head->type &&
1287 0 == strcmp(head->string, "NAME") &&
1288 NULL != body->child) {
1289
1290 /*
1291 * Suck the entire NAME section into memory.
1292 * Yes, we might run away.
1293 * But too many manuals have big, spread-out
1294 * NAME sections over many lines.
1295 */
1296
1297 title = NULL;
1298 man_deroff(&title, body);
1299 if (NULL == title)
1300 return;
1301
1302 /*
1303 * Go through a special heuristic dance here.
1304 * Conventionally, one or more manual names are
1305 * comma-specified prior to a whitespace, then a
1306 * dash, then a description. Try to puzzle out
1307 * the name parts here.
1308 */
1309
1310 start = title;
1311 for ( ;; ) {
1312 sz = strcspn(start, " ,");
1313 if ('\0' == start[sz])
1314 break;
1315
1316 byte = start[sz];
1317 start[sz] = '\0';
1318
1319 /*
1320 * Assume a stray trailing comma in the
1321 * name list if a name begins with a dash.
1322 */
1323
1324 if ('-' == start[0] ||
1325 ('\\' == start[0] && '-' == start[1]))
1326 break;
1327
1328 putkey(mpage, start, TYPE_Nm);
1329
1330 if (' ' == byte) {
1331 start += sz + 1;
1332 break;
1333 }
1334
1335 assert(',' == byte);
1336 start += sz + 1;
1337 while (' ' == *start)
1338 start++;
1339 }
1340
1341 if (start == title) {
1342 putkey(mpage, start, TYPE_Nm);
1343 free(title);
1344 return;
1345 }
1346
1347 while (isspace((unsigned char)*start))
1348 start++;
1349
1350 if (0 == strncmp(start, "-", 1))
1351 start += 1;
1352 else if (0 == strncmp(start, "\\-\\-", 4))
1353 start += 4;
1354 else if (0 == strncmp(start, "\\-", 2))
1355 start += 2;
1356 else if (0 == strncmp(start, "\\(en", 4))
1357 start += 4;
1358 else if (0 == strncmp(start, "\\(em", 4))
1359 start += 4;
1360
1361 while (' ' == *start)
1362 start++;
1363
1364 assert(NULL == mpage->desc);
1365 mpage->desc = mandoc_strdup(start);
1366 putkey(mpage, mpage->desc, TYPE_Nd);
1367 free(title);
1368 return;
1369 }
1370 }
1371
1372 for (n = n->child; n; n = n->next) {
1373 if (NULL != mpage->desc)
1374 break;
1375 parse_man(mpage, n);
1376 }
1377 }
1378
1379 static void
1380 parse_mdoc(struct mpage *mpage, const struct mdoc_node *n)
1381 {
1382
1383 assert(NULL != n);
1384 for (n = n->child; NULL != n; n = n->next) {
1385 switch (n->type) {
1386 case (MDOC_ELEM):
1387 /* FALLTHROUGH */
1388 case (MDOC_BLOCK):
1389 /* FALLTHROUGH */
1390 case (MDOC_HEAD):
1391 /* FALLTHROUGH */
1392 case (MDOC_BODY):
1393 /* FALLTHROUGH */
1394 case (MDOC_TAIL):
1395 if (NULL != mdocs[n->tok].fp)
1396 if (0 == (*mdocs[n->tok].fp)(mpage, n))
1397 break;
1398 if (mdocs[n->tok].mask)
1399 putmdockey(mpage, n->child,
1400 mdocs[n->tok].mask);
1401 break;
1402 default:
1403 assert(MDOC_ROOT != n->type);
1404 continue;
1405 }
1406 if (NULL != n->child)
1407 parse_mdoc(mpage, n);
1408 }
1409 }
1410
1411 static int
1412 parse_mdoc_Fd(struct mpage *mpage, const struct mdoc_node *n)
1413 {
1414 const char *start, *end;
1415 size_t sz;
1416
1417 if (SEC_SYNOPSIS != n->sec ||
1418 NULL == (n = n->child) ||
1419 MDOC_TEXT != n->type)
1420 return(0);
1421
1422 /*
1423 * Only consider those `Fd' macro fields that begin with an
1424 * "inclusion" token (versus, e.g., #define).
1425 */
1426
1427 if (strcmp("#include", n->string))
1428 return(0);
1429
1430 if (NULL == (n = n->next) || MDOC_TEXT != n->type)
1431 return(0);
1432
1433 /*
1434 * Strip away the enclosing angle brackets and make sure we're
1435 * not zero-length.
1436 */
1437
1438 start = n->string;
1439 if ('<' == *start || '"' == *start)
1440 start++;
1441
1442 if (0 == (sz = strlen(start)))
1443 return(0);
1444
1445 end = &start[(int)sz - 1];
1446 if ('>' == *end || '"' == *end)
1447 end--;
1448
1449 if (end > start)
1450 putkeys(mpage, start, end - start + 1, TYPE_In);
1451 return(0);
1452 }
1453
1454 static int
1455 parse_mdoc_Fn(struct mpage *mpage, const struct mdoc_node *n)
1456 {
1457 char *cp;
1458
1459 if (NULL == (n = n->child) || MDOC_TEXT != n->type)
1460 return(0);
1461
1462 /*
1463 * Parse: .Fn "struct type *name" "char *arg".
1464 * First strip away pointer symbol.
1465 * Then store the function name, then type.
1466 * Finally, store the arguments.
1467 */
1468
1469 if (NULL == (cp = strrchr(n->string, ' ')))
1470 cp = n->string;
1471
1472 while ('*' == *cp)
1473 cp++;
1474
1475 putkey(mpage, cp, TYPE_Fn);
1476
1477 if (n->string < cp)
1478 putkeys(mpage, n->string, cp - n->string, TYPE_Ft);
1479
1480 for (n = n->next; NULL != n; n = n->next)
1481 if (MDOC_TEXT == n->type)
1482 putkey(mpage, n->string, TYPE_Fa);
1483
1484 return(0);
1485 }
1486
1487 static int
1488 parse_mdoc_Xr(struct mpage *mpage, const struct mdoc_node *n)
1489 {
1490 char *cp;
1491
1492 if (NULL == (n = n->child))
1493 return(0);
1494
1495 if (NULL == n->next) {
1496 putkey(mpage, n->string, TYPE_Xr);
1497 return(0);
1498 }
1499
1500 mandoc_asprintf(&cp, "%s(%s)", n->string, n->next->string);
1501 putkey(mpage, cp, TYPE_Xr);
1502 free(cp);
1503 return(0);
1504 }
1505
1506 static int
1507 parse_mdoc_Nd(struct mpage *mpage, const struct mdoc_node *n)
1508 {
1509 size_t sz;
1510
1511 if (MDOC_BODY != n->type)
1512 return(0);
1513
1514 /*
1515 * Special-case the `Nd' because we need to put the description
1516 * into the document table.
1517 */
1518
1519 for (n = n->child; NULL != n; n = n->next) {
1520 if (MDOC_TEXT == n->type) {
1521 if (NULL != mpage->desc) {
1522 sz = strlen(mpage->desc) +
1523 strlen(n->string) + 2;
1524 mpage->desc = mandoc_realloc(
1525 mpage->desc, sz);
1526 strlcat(mpage->desc, " ", sz);
1527 strlcat(mpage->desc, n->string, sz);
1528 } else
1529 mpage->desc = mandoc_strdup(n->string);
1530 }
1531 if (NULL != n->child)
1532 parse_mdoc_Nd(mpage, n);
1533 }
1534 return(1);
1535 }
1536
1537 static int
1538 parse_mdoc_Nm(struct mpage *mpage, const struct mdoc_node *n)
1539 {
1540
1541 return(SEC_NAME == n->sec ||
1542 (SEC_SYNOPSIS == n->sec && MDOC_HEAD == n->type));
1543 }
1544
1545 static int
1546 parse_mdoc_Sh(struct mpage *mpage, const struct mdoc_node *n)
1547 {
1548
1549 return(SEC_CUSTOM == n->sec && MDOC_HEAD == n->type);
1550 }
1551
1552 static int
1553 parse_mdoc_head(struct mpage *mpage, const struct mdoc_node *n)
1554 {
1555
1556 return(MDOC_HEAD == n->type);
1557 }
1558
1559 static int
1560 parse_mdoc_body(struct mpage *mpage, const struct mdoc_node *n)
1561 {
1562
1563 return(MDOC_BODY == n->type);
1564 }
1565
1566 /*
1567 * Add a string to the hash table for the current manual.
1568 * Each string has a bitmask telling which macros it belongs to.
1569 * When we finish the manual, we'll dump the table.
1570 */
1571 static void
1572 putkeys(const struct mpage *mpage,
1573 const char *cp, size_t sz, uint64_t v)
1574 {
1575 struct str *s;
1576 const char *end;
1577 uint64_t mask;
1578 unsigned int slot;
1579 int i;
1580
1581 if (0 == sz)
1582 return;
1583
1584 if (verb > 1) {
1585 for (i = 0, mask = 1;
1586 i < mansearch_keymax;
1587 i++, mask <<= 1)
1588 if (mask & v)
1589 break;
1590 say(mpage->mlinks->file, "Adding key %s=%*s",
1591 mansearch_keynames[i], sz, cp);
1592 }
1593
1594 end = cp + sz;
1595 slot = ohash_qlookupi(&strings, cp, &end);
1596 s = ohash_find(&strings, slot);
1597
1598 if (NULL != s && mpage == s->mpage) {
1599 s->mask |= v;
1600 return;
1601 } else if (NULL == s) {
1602 s = mandoc_calloc(sizeof(struct str) + sz + 1, 1);
1603 memcpy(s->key, cp, sz);
1604 ohash_insert(&strings, slot, s);
1605 }
1606 s->mpage = mpage;
1607 s->mask = v;
1608 }
1609
1610 /*
1611 * Take a Unicode codepoint and produce its UTF-8 encoding.
1612 * This isn't the best way to do this, but it works.
1613 * The magic numbers are from the UTF-8 packaging.
1614 * They're not as scary as they seem: read the UTF-8 spec for details.
1615 */
1616 static size_t
1617 utf8(unsigned int cp, char out[7])
1618 {
1619 size_t rc;
1620
1621 rc = 0;
1622 if (cp <= 0x0000007F) {
1623 rc = 1;
1624 out[0] = (char)cp;
1625 } else if (cp <= 0x000007FF) {
1626 rc = 2;
1627 out[0] = (cp >> 6 & 31) | 192;
1628 out[1] = (cp & 63) | 128;
1629 } else if (cp <= 0x0000FFFF) {
1630 rc = 3;
1631 out[0] = (cp >> 12 & 15) | 224;
1632 out[1] = (cp >> 6 & 63) | 128;
1633 out[2] = (cp & 63) | 128;
1634 } else if (cp <= 0x001FFFFF) {
1635 rc = 4;
1636 out[0] = (cp >> 18 & 7) | 240;
1637 out[1] = (cp >> 12 & 63) | 128;
1638 out[2] = (cp >> 6 & 63) | 128;
1639 out[3] = (cp & 63) | 128;
1640 } else if (cp <= 0x03FFFFFF) {
1641 rc = 5;
1642 out[0] = (cp >> 24 & 3) | 248;
1643 out[1] = (cp >> 18 & 63) | 128;
1644 out[2] = (cp >> 12 & 63) | 128;
1645 out[3] = (cp >> 6 & 63) | 128;
1646 out[4] = (cp & 63) | 128;
1647 } else if (cp <= 0x7FFFFFFF) {
1648 rc = 6;
1649 out[0] = (cp >> 30 & 1) | 252;
1650 out[1] = (cp >> 24 & 63) | 128;
1651 out[2] = (cp >> 18 & 63) | 128;
1652 out[3] = (cp >> 12 & 63) | 128;
1653 out[4] = (cp >> 6 & 63) | 128;
1654 out[5] = (cp & 63) | 128;
1655 } else
1656 return(0);
1657
1658 out[rc] = '\0';
1659 return(rc);
1660 }
1661
1662 /*
1663 * Store the rendered version of a key, or alias the pointer
1664 * if the key contains no escape sequences.
1665 */
1666 static void
1667 render_key(struct mchars *mc, struct str *key)
1668 {
1669 size_t sz, bsz, pos;
1670 char utfbuf[7], res[6];
1671 char *buf;
1672 const char *seq, *cpp, *val;
1673 int len, u;
1674 enum mandoc_esc esc;
1675
1676 assert(NULL == key->rendered);
1677
1678 res[0] = '\\';
1679 res[1] = '\t';
1680 res[2] = ASCII_NBRSP;
1681 res[3] = ASCII_HYPH;
1682 res[4] = ASCII_BREAK;
1683 res[5] = '\0';
1684
1685 val = key->key;
1686 bsz = strlen(val);
1687
1688 /*
1689 * Pre-check: if we have no stop-characters, then set the
1690 * pointer as ourselvse and get out of here.
1691 */
1692 if (strcspn(val, res) == bsz) {
1693 key->rendered = key->key;
1694 return;
1695 }
1696
1697 /* Pre-allocate by the length of the input */
1698
1699 buf = mandoc_malloc(++bsz);
1700 pos = 0;
1701
1702 while ('\0' != *val) {
1703 /*
1704 * Halt on the first escape sequence.
1705 * This also halts on the end of string, in which case
1706 * we just copy, fallthrough, and exit the loop.
1707 */
1708 if ((sz = strcspn(val, res)) > 0) {
1709 memcpy(&buf[pos], val, sz);
1710 pos += sz;
1711 val += sz;
1712 }
1713
1714 switch (*val) {
1715 case (ASCII_HYPH):
1716 buf[pos++] = '-';
1717 val++;
1718 continue;
1719 case ('\t'):
1720 /* FALLTHROUGH */
1721 case (ASCII_NBRSP):
1722 buf[pos++] = ' ';
1723 val++;
1724 /* FALLTHROUGH */
1725 case (ASCII_BREAK):
1726 continue;
1727 default:
1728 break;
1729 }
1730 if ('\\' != *val)
1731 break;
1732
1733 /* Read past the slash. */
1734
1735 val++;
1736
1737 /*
1738 * Parse the escape sequence and see if it's a
1739 * predefined character or special character.
1740 */
1741
1742 esc = mandoc_escape
1743 ((const char **)&val, &seq, &len);
1744 if (ESCAPE_ERROR == esc)
1745 break;
1746 if (ESCAPE_SPECIAL != esc)
1747 continue;
1748
1749 /*
1750 * Render the special character
1751 * as either UTF-8 or ASCII.
1752 */
1753
1754 if (write_utf8) {
1755 if (0 == (u = mchars_spec2cp(mc, seq, len)))
1756 continue;
1757 cpp = utfbuf;
1758 if (0 == (sz = utf8(u, utfbuf)))
1759 continue;
1760 sz = strlen(cpp);
1761 } else {
1762 cpp = mchars_spec2str(mc, seq, len, &sz);
1763 if (NULL == cpp)
1764 continue;
1765 if (ASCII_NBRSP == *cpp) {
1766 cpp = " ";
1767 sz = 1;
1768 }
1769 }
1770
1771 /* Copy the rendered glyph into the stream. */
1772
1773 bsz += sz;
1774 buf = mandoc_realloc(buf, bsz);
1775 memcpy(&buf[pos], cpp, sz);
1776 pos += sz;
1777 }
1778
1779 buf[pos] = '\0';
1780 key->rendered = buf;
1781 }
1782
1783 static void
1784 dbadd_mlink(const struct mlink *mlink)
1785 {
1786 size_t i;
1787
1788 i = 1;
1789 SQL_BIND_TEXT(stmts[STMT_INSERT_LINK], i, mlink->dsec);
1790 SQL_BIND_TEXT(stmts[STMT_INSERT_LINK], i, mlink->arch);
1791 SQL_BIND_TEXT(stmts[STMT_INSERT_LINK], i, mlink->name);
1792 SQL_BIND_INT64(stmts[STMT_INSERT_LINK], i, mlink->mpage->recno);
1793 SQL_STEP(stmts[STMT_INSERT_LINK]);
1794 sqlite3_reset(stmts[STMT_INSERT_LINK]);
1795 }
1796
1797 /*
1798 * Flush the current page's terms (and their bits) into the database.
1799 * Wrap the entire set of additions in a transaction to make sqlite be a
1800 * little faster.
1801 * Also, handle escape sequences at the last possible moment.
1802 */
1803 static void
1804 dbadd(struct mpage *mpage, struct mchars *mc)
1805 {
1806 struct mlink *mlink;
1807 struct str *key;
1808 size_t i;
1809 unsigned int slot;
1810
1811 if (verb)
1812 say(mpage->mlinks->file, "Adding to database");
1813
1814 if (nodb)
1815 return;
1816
1817 i = 1;
1818 SQL_BIND_INT(stmts[STMT_INSERT_PAGE], i, FORM_SRC == mpage->form);
1819 SQL_STEP(stmts[STMT_INSERT_PAGE]);
1820 mpage->recno = sqlite3_last_insert_rowid(db);
1821 sqlite3_reset(stmts[STMT_INSERT_PAGE]);
1822
1823 for (mlink = mpage->mlinks; mlink; mlink = mlink->next)
1824 dbadd_mlink(mlink);
1825
1826 for (key = ohash_first(&strings, &slot); NULL != key;
1827 key = ohash_next(&strings, &slot)) {
1828 assert(key->mpage == mpage);
1829 if (NULL == key->rendered)
1830 render_key(mc, key);
1831 i = 1;
1832 SQL_BIND_INT64(stmts[STMT_INSERT_KEY], i, key->mask);
1833 SQL_BIND_TEXT(stmts[STMT_INSERT_KEY], i, key->rendered);
1834 SQL_BIND_INT64(stmts[STMT_INSERT_KEY], i, mpage->recno);
1835 SQL_STEP(stmts[STMT_INSERT_KEY]);
1836 sqlite3_reset(stmts[STMT_INSERT_KEY]);
1837 if (key->rendered != key->key)
1838 free(key->rendered);
1839 free(key);
1840 }
1841 }
1842
1843 static void
1844 dbprune(void)
1845 {
1846 struct mpage *mpage;
1847 struct mlink *mlink;
1848 size_t i;
1849 unsigned int slot;
1850
1851 if (0 == nodb)
1852 SQL_EXEC("BEGIN TRANSACTION");
1853
1854 for (mpage = ohash_first(&mpages, &slot); NULL != mpage;
1855 mpage = ohash_next(&mpages, &slot)) {
1856 mlink = mpage->mlinks;
1857 if (verb)
1858 say(mlink->file, "Deleting from database");
1859 if (nodb)
1860 continue;
1861 for ( ; NULL != mlink; mlink = mlink->next) {
1862 i = 1;
1863 SQL_BIND_TEXT(stmts[STMT_DELETE_PAGE],
1864 i, mlink->dsec);
1865 SQL_BIND_TEXT(stmts[STMT_DELETE_PAGE],
1866 i, mlink->arch);
1867 SQL_BIND_TEXT(stmts[STMT_DELETE_PAGE],
1868 i, mlink->name);
1869 SQL_STEP(stmts[STMT_DELETE_PAGE]);
1870 sqlite3_reset(stmts[STMT_DELETE_PAGE]);
1871 }
1872 }
1873
1874 if (0 == nodb)
1875 SQL_EXEC("END TRANSACTION");
1876 }
1877
1878 /*
1879 * Close an existing database and its prepared statements.
1880 * If "real" is not set, rename the temporary file into the real one.
1881 */
1882 static void
1883 dbclose(int real)
1884 {
1885 size_t i;
1886 int status;
1887 pid_t child;
1888
1889 if (nodb)
1890 return;
1891
1892 for (i = 0; i < STMT__MAX; i++) {
1893 sqlite3_finalize(stmts[i]);
1894 stmts[i] = NULL;
1895 }
1896
1897 sqlite3_close(db);
1898 db = NULL;
1899
1900 if (real)
1901 return;
1902
1903 if ('\0' == *tempfilename) {
1904 if (-1 == rename(MANDOC_DB "~", MANDOC_DB)) {
1905 exitcode = (int)MANDOCLEVEL_SYSERR;
1906 say(MANDOC_DB, "%s", strerror(errno));
1907 }
1908 return;
1909 }
1910
1911 switch (child = fork()) {
1912 case (-1):
1913 exitcode = (int)MANDOCLEVEL_SYSERR;
1914 say("fork cmp", "%s", strerror(errno));
1915 return;
1916 case (0):
1917 execlp("cmp", "cmp", "-s",
1918 tempfilename, MANDOC_DB, NULL);
1919 say("exec cmp", "%s", strerror(errno));
1920 exit(0);
1921 default:
1922 break;
1923 }
1924 if (-1 == waitpid(child, &status, 0)) {
1925 exitcode = (int)MANDOCLEVEL_SYSERR;
1926 say("wait cmp", "%s", strerror(errno));
1927 } else if (WIFSIGNALED(status)) {
1928 exitcode = (int)MANDOCLEVEL_SYSERR;
1929 say("cmp", "Died from a signal");
1930 } else if (WEXITSTATUS(status)) {
1931 exitcode = (int)MANDOCLEVEL_SYSERR;
1932 say(MANDOC_DB,
1933 "Data changed, but cannot replace database");
1934 }
1935
1936 *strrchr(tempfilename, '/') = '\0';
1937 switch (child = fork()) {
1938 case (-1):
1939 exitcode = (int)MANDOCLEVEL_SYSERR;
1940 say("fork rm", "%s", strerror(errno));
1941 return;
1942 case (0):
1943 execlp("rm", "rm", "-rf", tempfilename, NULL);
1944 say("exec rm", "%s", strerror(errno));
1945 exit((int)MANDOCLEVEL_SYSERR);
1946 default:
1947 break;
1948 }
1949 if (-1 == waitpid(child, &status, 0)) {
1950 exitcode = (int)MANDOCLEVEL_SYSERR;
1951 say("wait rm", "%s", strerror(errno));
1952 } else if (WIFSIGNALED(status) || WEXITSTATUS(status)) {
1953 exitcode = (int)MANDOCLEVEL_SYSERR;
1954 say(tempfilename,
1955 "Cannot remove temporary directory");
1956 }
1957 }
1958
1959 /*
1960 * This is straightforward stuff.
1961 * Open a database connection to a "temporary" database, then open a set
1962 * of prepared statements we'll use over and over again.
1963 * If "real" is set, we use the existing database; if not, we truncate a
1964 * temporary one.
1965 * Must be matched by dbclose().
1966 */
1967 static int
1968 dbopen(int real)
1969 {
1970 const char *sql;
1971 int rc, ofl;
1972
1973 if (nodb)
1974 return(1);
1975
1976 *tempfilename = '\0';
1977 ofl = SQLITE_OPEN_READWRITE;
1978
1979 if (real) {
1980 rc = sqlite3_open_v2(MANDOC_DB, &db, ofl, NULL);
1981 if (SQLITE_OK != rc) {
1982 exitcode = (int)MANDOCLEVEL_SYSERR;
1983 say(MANDOC_DB, "%s", sqlite3_errmsg(db));
1984 return(0);
1985 }
1986 goto prepare_statements;
1987 }
1988
1989 ofl |= SQLITE_OPEN_CREATE | SQLITE_OPEN_EXCLUSIVE;
1990
1991 remove(MANDOC_DB "~");
1992 rc = sqlite3_open_v2(MANDOC_DB "~", &db, ofl, NULL);
1993 if (SQLITE_OK == rc)
1994 goto create_tables;
1995 if (MPARSE_QUICK & mparse_options) {
1996 exitcode = (int)MANDOCLEVEL_SYSERR;
1997 say(MANDOC_DB "~", "%s", sqlite3_errmsg(db));
1998 return(0);
1999 }
2000
2001 if (strlcpy(tempfilename, "/tmp/mandocdb.XXXXXX",
2002 sizeof(tempfilename)) >= sizeof(tempfilename)) {
2003 exitcode = (int)MANDOCLEVEL_SYSERR;
2004 say("/tmp/mandocdb.XXXXXX", "Filename too long");
2005 return(0);
2006 }
2007 if (NULL == mkdtemp(tempfilename)) {
2008 exitcode = (int)MANDOCLEVEL_SYSERR;
2009 say(tempfilename, "%s", strerror(errno));
2010 return(0);
2011 }
2012 if (strlcat(tempfilename, "/" MANDOC_DB,
2013 sizeof(tempfilename)) >= sizeof(tempfilename)) {
2014 exitcode = (int)MANDOCLEVEL_SYSERR;
2015 say(tempfilename, "Filename too long");
2016 return(0);
2017 }
2018 rc = sqlite3_open_v2(tempfilename, &db, ofl, NULL);
2019 if (SQLITE_OK != rc) {
2020 exitcode = (int)MANDOCLEVEL_SYSERR;
2021 say(tempfilename, "%s", sqlite3_errmsg(db));
2022 return(0);
2023 }
2024
2025 create_tables:
2026 sql = "CREATE TABLE \"mpages\" (\n"
2027 " \"form\" INTEGER NOT NULL,\n"
2028 " \"id\" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL\n"
2029 ");\n"
2030 "\n"
2031 "CREATE TABLE \"mlinks\" (\n"
2032 " \"sec\" TEXT NOT NULL,\n"
2033 " \"arch\" TEXT NOT NULL,\n"
2034 " \"name\" TEXT NOT NULL,\n"
2035 " \"pageid\" INTEGER NOT NULL REFERENCES mpages(id) "
2036 "ON DELETE CASCADE\n"
2037 ");\n"
2038 "\n"
2039 "CREATE TABLE \"keys\" (\n"
2040 " \"bits\" INTEGER NOT NULL,\n"
2041 " \"key\" TEXT NOT NULL,\n"
2042 " \"pageid\" INTEGER NOT NULL REFERENCES mpages(id) "
2043 "ON DELETE CASCADE\n"
2044 ");\n";
2045
2046 if (SQLITE_OK != sqlite3_exec(db, sql, NULL, NULL, NULL)) {
2047 exitcode = (int)MANDOCLEVEL_SYSERR;
2048 say(MANDOC_DB, "%s", sqlite3_errmsg(db));
2049 return(0);
2050 }
2051
2052 prepare_statements:
2053 SQL_EXEC("PRAGMA foreign_keys = ON");
2054 sql = "DELETE FROM mpages WHERE id IN "
2055 "(SELECT pageid FROM mlinks WHERE "
2056 "sec=? AND arch=? AND name=?)";
2057 sqlite3_prepare_v2(db, sql, -1, &stmts[STMT_DELETE_PAGE], NULL);
2058 sql = "INSERT INTO mpages "
2059 "(form) VALUES (?)";
2060 sqlite3_prepare_v2(db, sql, -1, &stmts[STMT_INSERT_PAGE], NULL);
2061 sql = "INSERT INTO mlinks "
2062 "(sec,arch,name,pageid) VALUES (?,?,?,?)";
2063 sqlite3_prepare_v2(db, sql, -1, &stmts[STMT_INSERT_LINK], NULL);
2064 sql = "INSERT INTO keys "
2065 "(bits,key,pageid) VALUES (?,?,?)";
2066 sqlite3_prepare_v2(db, sql, -1, &stmts[STMT_INSERT_KEY], NULL);
2067
2068 #ifndef __APPLE__
2069 /*
2070 * When opening a new database, we can turn off
2071 * synchronous mode for much better performance.
2072 */
2073
2074 if (real)
2075 SQL_EXEC("PRAGMA synchronous = OFF");
2076 #endif
2077
2078 return(1);
2079 }
2080
2081 static void *
2082 hash_halloc(size_t sz, void *arg)
2083 {
2084
2085 return(mandoc_calloc(sz, 1));
2086 }
2087
2088 static void *
2089 hash_alloc(size_t sz, void *arg)
2090 {
2091
2092 return(mandoc_malloc(sz));
2093 }
2094
2095 static void
2096 hash_free(void *p, size_t sz, void *arg)
2097 {
2098
2099 free(p);
2100 }
2101
2102 static int
2103 set_basedir(const char *targetdir)
2104 {
2105 static char startdir[PATH_MAX];
2106 static int fd;
2107
2108 /*
2109 * Remember where we started by keeping a fd open to the origin
2110 * path component: throughout this utility, we chdir() a lot to
2111 * handle relative paths, and by doing this, we can return to
2112 * the starting point.
2113 */
2114 if ('\0' == *startdir) {
2115 if (NULL == getcwd(startdir, PATH_MAX)) {
2116 exitcode = (int)MANDOCLEVEL_SYSERR;
2117 if (NULL != targetdir)
2118 say(".", NULL);
2119 return(0);
2120 }
2121 if (-1 == (fd = open(startdir, O_RDONLY, 0))) {
2122 exitcode = (int)MANDOCLEVEL_SYSERR;
2123 say(startdir, NULL);
2124 return(0);
2125 }
2126 if (NULL == targetdir)
2127 targetdir = startdir;
2128 } else {
2129 if (-1 == fd)
2130 return(0);
2131 if (-1 == fchdir(fd)) {
2132 close(fd);
2133 basedir[0] = '\0';
2134 exitcode = (int)MANDOCLEVEL_SYSERR;
2135 say(startdir, NULL);
2136 return(0);
2137 }
2138 if (NULL == targetdir) {
2139 close(fd);
2140 return(1);
2141 }
2142 }
2143 if (NULL == realpath(targetdir, basedir)) {
2144 basedir[0] = '\0';
2145 exitcode = (int)MANDOCLEVEL_BADARG;
2146 say(targetdir, NULL);
2147 return(0);
2148 } else if (-1 == chdir(basedir)) {
2149 exitcode = (int)MANDOCLEVEL_BADARG;
2150 say("", NULL);
2151 return(0);
2152 }
2153 return(1);
2154 }
2155
2156 static void
2157 say(const char *file, const char *format, ...)
2158 {
2159 va_list ap;
2160
2161 if ('\0' != *basedir)
2162 fprintf(stderr, "%s", basedir);
2163 if ('\0' != *basedir && '\0' != *file)
2164 fputs("//", stderr);
2165 if ('\0' != *file)
2166 fprintf(stderr, "%s", file);
2167 fputs(": ", stderr);
2168
2169 if (NULL == format) {
2170 perror(NULL);
2171 return;
2172 }
2173
2174 va_start(ap, format);
2175 vfprintf(stderr, format, ap);
2176 va_end(ap);
2177
2178 fputc('\n', stderr);
2179 }
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