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Sevan Janiyan resigned from the NetBSD project and pkgsrc in 2020.
[mandoc.git] / mandocdb.c
1 /* $Id: mandocdb.c,v 1.269 2021/08/19 16:55:31 schwarze Exp $ */
2 /*
3 * Copyright (c) 2011-2020 Ingo Schwarze <schwarze@openbsd.org>
4 * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
5 * Copyright (c) 2016 Ed Maste <emaste@freebsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 *
19 * Implementation of the makewhatis(8) program.
20 */
21 #include "config.h"
22
23 #include <sys/types.h>
24 #include <sys/mman.h>
25 #include <sys/stat.h>
26
27 #include <assert.h>
28 #include <ctype.h>
29 #if HAVE_ERR
30 #include <err.h>
31 #endif
32 #include <errno.h>
33 #include <fcntl.h>
34 #if HAVE_FTS
35 #include <fts.h>
36 #else
37 #include "compat_fts.h"
38 #endif
39 #include <limits.h>
40 #if HAVE_SANDBOX_INIT
41 #include <sandbox.h>
42 #endif
43 #include <stdarg.h>
44 #include <stddef.h>
45 #include <stdio.h>
46 #include <stdint.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50
51 #include "mandoc_aux.h"
52 #include "mandoc_ohash.h"
53 #include "mandoc.h"
54 #include "roff.h"
55 #include "mdoc.h"
56 #include "man.h"
57 #include "mandoc_parse.h"
58 #include "manconf.h"
59 #include "mansearch.h"
60 #include "dba_array.h"
61 #include "dba.h"
62
63 extern const char *const mansearch_keynames[];
64
65 enum op {
66 OP_DEFAULT = 0, /* new dbs from dir list or default config */
67 OP_CONFFILE, /* new databases from custom config file */
68 OP_UPDATE, /* delete/add entries in existing database */
69 OP_DELETE, /* delete entries from existing database */
70 OP_TEST /* change no databases, report potential problems */
71 };
72
73 struct str {
74 const struct mpage *mpage; /* if set, the owning parse */
75 uint64_t mask; /* bitmask in sequence */
76 char key[]; /* rendered text */
77 };
78
79 struct inodev {
80 ino_t st_ino;
81 dev_t st_dev;
82 };
83
84 struct mpage {
85 struct inodev inodev; /* used for hashing routine */
86 struct dba_array *dba;
87 char *sec; /* section from file content */
88 char *arch; /* architecture from file content */
89 char *title; /* title from file content */
90 char *desc; /* description from file content */
91 struct mpage *next; /* singly linked list */
92 struct mlink *mlinks; /* singly linked list */
93 int name_head_done;
94 enum form form; /* format from file content */
95 };
96
97 struct mlink {
98 char file[PATH_MAX]; /* filename rel. to manpath */
99 char *dsec; /* section from directory */
100 char *arch; /* architecture from directory */
101 char *name; /* name from file name (not empty) */
102 char *fsec; /* section from file name suffix */
103 struct mlink *next; /* singly linked list */
104 struct mpage *mpage; /* parent */
105 int gzip; /* filename has a .gz suffix */
106 enum form dform; /* format from directory */
107 enum form fform; /* format from file name suffix */
108 };
109
110 typedef int (*mdoc_fp)(struct mpage *, const struct roff_meta *,
111 const struct roff_node *);
112
113 struct mdoc_handler {
114 mdoc_fp fp; /* optional handler */
115 uint64_t mask; /* set unless handler returns 0 */
116 int taboo; /* node flags that must not be set */
117 };
118
119
120 int mandocdb(int, char *[]);
121
122 static void dbadd(struct dba *, struct mpage *);
123 static void dbadd_mlink(const struct mlink *);
124 static void dbprune(struct dba *);
125 static void dbwrite(struct dba *);
126 static void filescan(const char *);
127 #if HAVE_FTS_COMPARE_CONST
128 static int fts_compare(const FTSENT *const *, const FTSENT *const *);
129 #else
130 static int fts_compare(const FTSENT **, const FTSENT **);
131 #endif
132 static void mlink_add(struct mlink *, const struct stat *);
133 static void mlink_check(struct mpage *, struct mlink *);
134 static void mlink_free(struct mlink *);
135 static void mlinks_undupe(struct mpage *);
136 static void mpages_free(void);
137 static void mpages_merge(struct dba *, struct mparse *);
138 static void parse_cat(struct mpage *, int);
139 static void parse_man(struct mpage *, const struct roff_meta *,
140 const struct roff_node *);
141 static void parse_mdoc(struct mpage *, const struct roff_meta *,
142 const struct roff_node *);
143 static int parse_mdoc_head(struct mpage *, const struct roff_meta *,
144 const struct roff_node *);
145 static int parse_mdoc_Fa(struct mpage *, const struct roff_meta *,
146 const struct roff_node *);
147 static int parse_mdoc_Fd(struct mpage *, const struct roff_meta *,
148 const struct roff_node *);
149 static void parse_mdoc_fname(struct mpage *, const struct roff_node *);
150 static int parse_mdoc_Fn(struct mpage *, const struct roff_meta *,
151 const struct roff_node *);
152 static int parse_mdoc_Fo(struct mpage *, const struct roff_meta *,
153 const struct roff_node *);
154 static int parse_mdoc_Nd(struct mpage *, const struct roff_meta *,
155 const struct roff_node *);
156 static int parse_mdoc_Nm(struct mpage *, const struct roff_meta *,
157 const struct roff_node *);
158 static int parse_mdoc_Sh(struct mpage *, const struct roff_meta *,
159 const struct roff_node *);
160 static int parse_mdoc_Va(struct mpage *, const struct roff_meta *,
161 const struct roff_node *);
162 static int parse_mdoc_Xr(struct mpage *, const struct roff_meta *,
163 const struct roff_node *);
164 static void putkey(const struct mpage *, char *, uint64_t);
165 static void putkeys(const struct mpage *, char *, size_t, uint64_t);
166 static void putmdockey(const struct mpage *,
167 const struct roff_node *, uint64_t, int);
168 #ifdef READ_ALLOWED_PATH
169 static int read_allowed(const char *);
170 #endif
171 static int render_string(char **, size_t *);
172 static void say(const char *, const char *, ...)
173 __attribute__((__format__ (__printf__, 2, 3)));
174 static int set_basedir(const char *, int);
175 static int treescan(void);
176 static size_t utf8(unsigned int, char [7]);
177
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 debug; /* 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 size_t basedir_len; /* strlen(basedir) */
188 static struct mpage *mpage_head; /* list of distinct manual pages */
189 static struct ohash mpages; /* table of distinct manual pages */
190 static struct ohash mlinks; /* table of directory entries */
191 static struct ohash names; /* table of all names */
192 static struct ohash strings; /* table of all strings */
193 static uint64_t name_mask;
194
195 static const struct mdoc_handler mdoc_handlers[MDOC_MAX - MDOC_Dd] = {
196 { NULL, 0, NODE_NOPRT }, /* Dd */
197 { NULL, 0, NODE_NOPRT }, /* Dt */
198 { NULL, 0, NODE_NOPRT }, /* Os */
199 { parse_mdoc_Sh, TYPE_Sh, 0 }, /* Sh */
200 { parse_mdoc_head, TYPE_Ss, 0 }, /* Ss */
201 { NULL, 0, 0 }, /* Pp */
202 { NULL, 0, 0 }, /* D1 */
203 { NULL, 0, 0 }, /* Dl */
204 { NULL, 0, 0 }, /* Bd */
205 { NULL, 0, 0 }, /* Ed */
206 { NULL, 0, 0 }, /* Bl */
207 { NULL, 0, 0 }, /* El */
208 { NULL, 0, 0 }, /* It */
209 { NULL, 0, 0 }, /* Ad */
210 { NULL, TYPE_An, 0 }, /* An */
211 { NULL, 0, 0 }, /* Ap */
212 { NULL, TYPE_Ar, 0 }, /* Ar */
213 { NULL, TYPE_Cd, 0 }, /* Cd */
214 { NULL, TYPE_Cm, 0 }, /* Cm */
215 { NULL, TYPE_Dv, 0 }, /* Dv */
216 { NULL, TYPE_Er, 0 }, /* Er */
217 { NULL, TYPE_Ev, 0 }, /* Ev */
218 { NULL, 0, 0 }, /* Ex */
219 { parse_mdoc_Fa, 0, 0 }, /* Fa */
220 { parse_mdoc_Fd, 0, 0 }, /* Fd */
221 { NULL, TYPE_Fl, 0 }, /* Fl */
222 { parse_mdoc_Fn, 0, 0 }, /* Fn */
223 { NULL, TYPE_Ft | TYPE_Vt, 0 }, /* Ft */
224 { NULL, TYPE_Ic, 0 }, /* Ic */
225 { NULL, TYPE_In, 0 }, /* In */
226 { NULL, TYPE_Li, 0 }, /* Li */
227 { parse_mdoc_Nd, 0, 0 }, /* Nd */
228 { parse_mdoc_Nm, 0, 0 }, /* Nm */
229 { NULL, 0, 0 }, /* Op */
230 { NULL, 0, 0 }, /* Ot */
231 { NULL, TYPE_Pa, NODE_NOSRC }, /* Pa */
232 { NULL, 0, 0 }, /* Rv */
233 { NULL, TYPE_St, 0 }, /* St */
234 { parse_mdoc_Va, TYPE_Va, 0 }, /* Va */
235 { parse_mdoc_Va, TYPE_Vt, 0 }, /* Vt */
236 { parse_mdoc_Xr, 0, 0 }, /* Xr */
237 { NULL, 0, 0 }, /* %A */
238 { NULL, 0, 0 }, /* %B */
239 { NULL, 0, 0 }, /* %D */
240 { NULL, 0, 0 }, /* %I */
241 { NULL, 0, 0 }, /* %J */
242 { NULL, 0, 0 }, /* %N */
243 { NULL, 0, 0 }, /* %O */
244 { NULL, 0, 0 }, /* %P */
245 { NULL, 0, 0 }, /* %R */
246 { NULL, 0, 0 }, /* %T */
247 { NULL, 0, 0 }, /* %V */
248 { NULL, 0, 0 }, /* Ac */
249 { NULL, 0, 0 }, /* Ao */
250 { NULL, 0, 0 }, /* Aq */
251 { NULL, TYPE_At, 0 }, /* At */
252 { NULL, 0, 0 }, /* Bc */
253 { NULL, 0, 0 }, /* Bf */
254 { NULL, 0, 0 }, /* Bo */
255 { NULL, 0, 0 }, /* Bq */
256 { NULL, TYPE_Bsx, NODE_NOSRC }, /* Bsx */
257 { NULL, TYPE_Bx, NODE_NOSRC }, /* Bx */
258 { NULL, 0, 0 }, /* Db */
259 { NULL, 0, 0 }, /* Dc */
260 { NULL, 0, 0 }, /* Do */
261 { NULL, 0, 0 }, /* Dq */
262 { NULL, 0, 0 }, /* Ec */
263 { NULL, 0, 0 }, /* Ef */
264 { NULL, TYPE_Em, 0 }, /* Em */
265 { NULL, 0, 0 }, /* Eo */
266 { NULL, TYPE_Fx, NODE_NOSRC }, /* Fx */
267 { NULL, TYPE_Ms, 0 }, /* Ms */
268 { NULL, 0, 0 }, /* No */
269 { NULL, 0, 0 }, /* Ns */
270 { NULL, TYPE_Nx, NODE_NOSRC }, /* Nx */
271 { NULL, TYPE_Ox, NODE_NOSRC }, /* Ox */
272 { NULL, 0, 0 }, /* Pc */
273 { NULL, 0, 0 }, /* Pf */
274 { NULL, 0, 0 }, /* Po */
275 { NULL, 0, 0 }, /* Pq */
276 { NULL, 0, 0 }, /* Qc */
277 { NULL, 0, 0 }, /* Ql */
278 { NULL, 0, 0 }, /* Qo */
279 { NULL, 0, 0 }, /* Qq */
280 { NULL, 0, 0 }, /* Re */
281 { NULL, 0, 0 }, /* Rs */
282 { NULL, 0, 0 }, /* Sc */
283 { NULL, 0, 0 }, /* So */
284 { NULL, 0, 0 }, /* Sq */
285 { NULL, 0, 0 }, /* Sm */
286 { NULL, 0, 0 }, /* Sx */
287 { NULL, TYPE_Sy, 0 }, /* Sy */
288 { NULL, TYPE_Tn, 0 }, /* Tn */
289 { NULL, 0, NODE_NOSRC }, /* Ux */
290 { NULL, 0, 0 }, /* Xc */
291 { NULL, 0, 0 }, /* Xo */
292 { parse_mdoc_Fo, 0, 0 }, /* Fo */
293 { NULL, 0, 0 }, /* Fc */
294 { NULL, 0, 0 }, /* Oo */
295 { NULL, 0, 0 }, /* Oc */
296 { NULL, 0, 0 }, /* Bk */
297 { NULL, 0, 0 }, /* Ek */
298 { NULL, 0, 0 }, /* Bt */
299 { NULL, 0, 0 }, /* Hf */
300 { NULL, 0, 0 }, /* Fr */
301 { NULL, 0, 0 }, /* Ud */
302 { NULL, TYPE_Lb, NODE_NOSRC }, /* Lb */
303 { NULL, 0, 0 }, /* Lp */
304 { NULL, TYPE_Lk, 0 }, /* Lk */
305 { NULL, TYPE_Mt, NODE_NOSRC }, /* Mt */
306 { NULL, 0, 0 }, /* Brq */
307 { NULL, 0, 0 }, /* Bro */
308 { NULL, 0, 0 }, /* Brc */
309 { NULL, 0, 0 }, /* %C */
310 { NULL, 0, 0 }, /* Es */
311 { NULL, 0, 0 }, /* En */
312 { NULL, TYPE_Dx, NODE_NOSRC }, /* Dx */
313 { NULL, 0, 0 }, /* %Q */
314 { NULL, 0, 0 }, /* %U */
315 { NULL, 0, 0 }, /* Ta */
316 };
317
318
319 int
320 mandocdb(int argc, char *argv[])
321 {
322 struct manconf conf;
323 struct mparse *mp;
324 struct dba *dba;
325 const char *path_arg, *progname;
326 size_t j, sz;
327 int ch, i;
328
329 #if HAVE_PLEDGE
330 if (pledge("stdio rpath wpath cpath", NULL) == -1) {
331 warn("pledge");
332 return (int)MANDOCLEVEL_SYSERR;
333 }
334 #endif
335
336 #if HAVE_SANDBOX_INIT
337 if (sandbox_init(kSBXProfileNoInternet, SANDBOX_NAMED, NULL) == -1) {
338 warnx("sandbox_init");
339 return (int)MANDOCLEVEL_SYSERR;
340 }
341 #endif
342
343 memset(&conf, 0, sizeof(conf));
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) != OP_DEFAULT) { \
352 warnx("-%c: Conflicting option", (_ch)); \
353 goto usage; \
354 } while (/*CONSTCOND*/0)
355
356 mparse_options = MPARSE_VALIDATE;
357 path_arg = NULL;
358 op = OP_DEFAULT;
359
360 while ((ch = getopt(argc, argv, "aC:Dd:npQT:tu:v")) != -1)
361 switch (ch) {
362 case 'a':
363 use_all = 1;
364 break;
365 case 'C':
366 CHECKOP(op, ch);
367 path_arg = optarg;
368 op = OP_CONFFILE;
369 break;
370 case 'D':
371 debug++;
372 break;
373 case 'd':
374 CHECKOP(op, ch);
375 path_arg = optarg;
376 op = OP_UPDATE;
377 break;
378 case 'n':
379 nodb = 1;
380 break;
381 case 'p':
382 warnings = 1;
383 break;
384 case 'Q':
385 mparse_options |= MPARSE_QUICK;
386 break;
387 case 'T':
388 if (strcmp(optarg, "utf8") != 0) {
389 warnx("-T%s: Unsupported output format",
390 optarg);
391 goto usage;
392 }
393 write_utf8 = 1;
394 break;
395 case 't':
396 CHECKOP(op, ch);
397 dup2(STDOUT_FILENO, STDERR_FILENO);
398 op = OP_TEST;
399 nodb = warnings = 1;
400 break;
401 case 'u':
402 CHECKOP(op, ch);
403 path_arg = optarg;
404 op = OP_DELETE;
405 break;
406 case 'v':
407 /* Compatibility with espie@'s makewhatis. */
408 break;
409 default:
410 goto usage;
411 }
412
413 argc -= optind;
414 argv += optind;
415
416 #if HAVE_PLEDGE
417 if (nodb) {
418 if (pledge("stdio rpath", NULL) == -1) {
419 warn("pledge");
420 return (int)MANDOCLEVEL_SYSERR;
421 }
422 }
423 #endif
424
425 if (op == OP_CONFFILE && argc > 0) {
426 warnx("-C: Too many arguments");
427 goto usage;
428 }
429
430 exitcode = (int)MANDOCLEVEL_OK;
431 mchars_alloc();
432 mp = mparse_alloc(mparse_options, MANDOC_OS_OTHER, NULL);
433 mandoc_ohash_init(&mpages, 6, offsetof(struct mpage, inodev));
434 mandoc_ohash_init(&mlinks, 6, offsetof(struct mlink, file));
435
436 if (op == OP_UPDATE || op == OP_DELETE || op == OP_TEST) {
437
438 /*
439 * Most of these deal with a specific directory.
440 * Jump into that directory first.
441 */
442 if (op != OP_TEST && set_basedir(path_arg, 1) == 0)
443 goto out;
444
445 dba = nodb ? dba_new(128) : dba_read(MANDOC_DB);
446 if (dba != NULL) {
447 /*
448 * The existing database is usable. Process
449 * all files specified on the command-line.
450 */
451 use_all = 1;
452 for (i = 0; i < argc; i++)
453 filescan(argv[i]);
454 if (nodb == 0)
455 dbprune(dba);
456 } else {
457 /* Database missing or corrupt. */
458 if (op != OP_UPDATE || errno != ENOENT)
459 say(MANDOC_DB, "%s: Automatically recreating"
460 " from scratch", strerror(errno));
461 exitcode = (int)MANDOCLEVEL_OK;
462 op = OP_DEFAULT;
463 if (treescan() == 0)
464 goto out;
465 dba = dba_new(128);
466 }
467 if (op != OP_DELETE)
468 mpages_merge(dba, mp);
469 if (nodb == 0)
470 dbwrite(dba);
471 dba_free(dba);
472 } else {
473 /*
474 * If we have arguments, use them as our manpaths.
475 * If we don't, use man.conf(5).
476 */
477 if (argc > 0) {
478 conf.manpath.paths = mandoc_reallocarray(NULL,
479 argc, sizeof(char *));
480 conf.manpath.sz = (size_t)argc;
481 for (i = 0; i < argc; i++)
482 conf.manpath.paths[i] = mandoc_strdup(argv[i]);
483 } else
484 manconf_parse(&conf, path_arg, NULL, NULL);
485
486 if (conf.manpath.sz == 0) {
487 exitcode = (int)MANDOCLEVEL_BADARG;
488 say("", "Empty manpath");
489 }
490
491 /*
492 * First scan the tree rooted at a base directory, then
493 * build a new database and finally move it into place.
494 * Ignore zero-length directories and strip trailing
495 * slashes.
496 */
497 for (j = 0; j < conf.manpath.sz; j++) {
498 sz = strlen(conf.manpath.paths[j]);
499 if (sz && conf.manpath.paths[j][sz - 1] == '/')
500 conf.manpath.paths[j][--sz] = '\0';
501 if (sz == 0)
502 continue;
503
504 if (j) {
505 mandoc_ohash_init(&mpages, 6,
506 offsetof(struct mpage, inodev));
507 mandoc_ohash_init(&mlinks, 6,
508 offsetof(struct mlink, file));
509 }
510
511 if (set_basedir(conf.manpath.paths[j], argc > 0) == 0)
512 continue;
513 if (treescan() == 0)
514 continue;
515 dba = dba_new(128);
516 mpages_merge(dba, mp);
517 if (nodb == 0)
518 dbwrite(dba);
519 dba_free(dba);
520
521 if (j + 1 < conf.manpath.sz) {
522 mpages_free();
523 ohash_delete(&mpages);
524 ohash_delete(&mlinks);
525 }
526 }
527 }
528 out:
529 manconf_free(&conf);
530 mparse_free(mp);
531 mchars_free();
532 mpages_free();
533 ohash_delete(&mpages);
534 ohash_delete(&mlinks);
535 return exitcode;
536 usage:
537 progname = getprogname();
538 fprintf(stderr, "usage: %s [-aDnpQ] [-C file] [-Tutf8]\n"
539 " %s [-aDnpQ] [-Tutf8] dir ...\n"
540 " %s [-DnpQ] [-Tutf8] -d dir [file ...]\n"
541 " %s [-Dnp] -u dir [file ...]\n"
542 " %s [-Q] -t file ...\n",
543 progname, progname, progname, progname, progname);
544
545 return (int)MANDOCLEVEL_BADARG;
546 }
547
548 /*
549 * To get a singly linked list in alpha order while inserting entries
550 * at the beginning, process directory entries in reverse alpha order.
551 */
552 static int
553 #if HAVE_FTS_COMPARE_CONST
554 fts_compare(const FTSENT *const *a, const FTSENT *const *b)
555 #else
556 fts_compare(const FTSENT **a, const FTSENT **b)
557 #endif
558 {
559 return -strcmp((*a)->fts_name, (*b)->fts_name);
560 }
561
562 /*
563 * Scan a directory tree rooted at "basedir" for manpages.
564 * We use fts(), scanning directory parts along the way for clues to our
565 * section and architecture.
566 *
567 * If use_all has been specified, grok all files.
568 * If not, sanitise paths to the following:
569 *
570 * [./]man*[/<arch>]/<name>.<section>
571 * or
572 * [./]cat<section>[/<arch>]/<name>.0
573 *
574 * TODO: accommodate for multi-language directories.
575 */
576 static int
577 treescan(void)
578 {
579 char buf[PATH_MAX];
580 FTS *f;
581 FTSENT *ff;
582 struct mlink *mlink;
583 int gzip;
584 enum form dform;
585 char *dsec, *arch, *fsec, *cp;
586 const char *path;
587 const char *argv[2];
588
589 argv[0] = ".";
590 argv[1] = NULL;
591
592 f = fts_open((char * const *)argv, FTS_PHYSICAL | FTS_NOCHDIR,
593 fts_compare);
594 if (f == NULL) {
595 exitcode = (int)MANDOCLEVEL_SYSERR;
596 say("", "&fts_open");
597 return 0;
598 }
599
600 dsec = arch = NULL;
601 dform = FORM_NONE;
602
603 while ((ff = fts_read(f)) != NULL) {
604 path = ff->fts_path + 2;
605 switch (ff->fts_info) {
606
607 /*
608 * Symbolic links require various sanity checks,
609 * then get handled just like regular files.
610 */
611 case FTS_SL:
612 if (realpath(path, buf) == NULL) {
613 if (warnings)
614 say(path, "&realpath");
615 continue;
616 }
617 if (strncmp(buf, basedir, basedir_len) != 0
618 #ifdef READ_ALLOWED_PATH
619 && !read_allowed(buf)
620 #endif
621 ) {
622 if (warnings) say("",
623 "%s: outside base directory", buf);
624 continue;
625 }
626 /* Use logical inode to avoid mpages dupe. */
627 if (stat(path, ff->fts_statp) == -1) {
628 if (warnings)
629 say(path, "&stat");
630 continue;
631 }
632 if ((ff->fts_statp->st_mode & S_IFMT) != S_IFREG)
633 continue;
634 /* FALLTHROUGH */
635
636 /*
637 * If we're a regular file, add an mlink by using the
638 * stored directory data and handling the filename.
639 */
640 case FTS_F:
641 if ( ! strcmp(path, MANDOC_DB))
642 continue;
643 if ( ! use_all && ff->fts_level < 2) {
644 if (warnings)
645 say(path, "Extraneous file");
646 continue;
647 }
648 gzip = 0;
649 fsec = NULL;
650 while (fsec == NULL) {
651 fsec = strrchr(ff->fts_name, '.');
652 if (fsec == NULL || strcmp(fsec+1, "gz"))
653 break;
654 gzip = 1;
655 *fsec = '\0';
656 fsec = NULL;
657 }
658 if (fsec == NULL) {
659 if ( ! use_all) {
660 if (warnings)
661 say(path,
662 "No filename suffix");
663 continue;
664 }
665 } else if ( ! strcmp(++fsec, "html")) {
666 if (warnings)
667 say(path, "Skip html");
668 continue;
669 } else if ( ! strcmp(fsec, "ps")) {
670 if (warnings)
671 say(path, "Skip ps");
672 continue;
673 } else if ( ! strcmp(fsec, "pdf")) {
674 if (warnings)
675 say(path, "Skip pdf");
676 continue;
677 } else if ( ! use_all &&
678 ((dform == FORM_SRC &&
679 strncmp(fsec, dsec, strlen(dsec))) ||
680 (dform == FORM_CAT && strcmp(fsec, "0")))) {
681 if (warnings)
682 say(path, "Wrong filename suffix");
683 continue;
684 } else
685 fsec[-1] = '\0';
686
687 mlink = mandoc_calloc(1, sizeof(struct mlink));
688 if (strlcpy(mlink->file, path,
689 sizeof(mlink->file)) >=
690 sizeof(mlink->file)) {
691 say(path, "Filename too long");
692 free(mlink);
693 continue;
694 }
695 mlink->dform = dform;
696 mlink->dsec = dsec;
697 mlink->arch = arch;
698 mlink->name = ff->fts_name;
699 mlink->fsec = fsec;
700 mlink->gzip = gzip;
701 mlink_add(mlink, ff->fts_statp);
702 continue;
703
704 case FTS_D:
705 case FTS_DP:
706 break;
707
708 default:
709 if (warnings)
710 say(path, "Not a regular file");
711 continue;
712 }
713
714 switch (ff->fts_level) {
715 case 0:
716 /* Ignore the root directory. */
717 break;
718 case 1:
719 /*
720 * This might contain manX/ or catX/.
721 * Try to infer this from the name.
722 * If we're not in use_all, enforce it.
723 */
724 cp = ff->fts_name;
725 if (ff->fts_info == FTS_DP) {
726 dform = FORM_NONE;
727 dsec = NULL;
728 break;
729 }
730
731 if ( ! strncmp(cp, "man", 3)) {
732 dform = FORM_SRC;
733 dsec = cp + 3;
734 } else if ( ! strncmp(cp, "cat", 3)) {
735 dform = FORM_CAT;
736 dsec = cp + 3;
737 } else {
738 dform = FORM_NONE;
739 dsec = NULL;
740 }
741
742 if (dsec != NULL || use_all)
743 break;
744
745 if (warnings)
746 say(path, "Unknown directory part");
747 fts_set(f, ff, FTS_SKIP);
748 break;
749 case 2:
750 /*
751 * Possibly our architecture.
752 * If we're descending, keep tabs on it.
753 */
754 if (ff->fts_info != FTS_DP && dsec != NULL)
755 arch = ff->fts_name;
756 else
757 arch = NULL;
758 break;
759 default:
760 if (ff->fts_info == FTS_DP || use_all)
761 break;
762 if (warnings)
763 say(path, "Extraneous directory part");
764 fts_set(f, ff, FTS_SKIP);
765 break;
766 }
767 }
768
769 fts_close(f);
770 return 1;
771 }
772
773 /*
774 * Add a file to the mlinks table.
775 * Do not verify that it's a "valid" looking manpage (we'll do that
776 * later).
777 *
778 * Try to infer the manual section, architecture, and page name from the
779 * path, assuming it looks like
780 *
781 * [./]man*[/<arch>]/<name>.<section>
782 * or
783 * [./]cat<section>[/<arch>]/<name>.0
784 *
785 * See treescan() for the fts(3) version of this.
786 */
787 static void
788 filescan(const char *infile)
789 {
790 struct stat st;
791 struct mlink *mlink;
792 char *linkfile, *p, *realdir, *start, *usefile;
793 size_t realdir_len;
794
795 assert(use_all);
796
797 if (strncmp(infile, "./", 2) == 0)
798 infile += 2;
799
800 /*
801 * We have to do lstat(2) before realpath(3) loses
802 * the information whether this is a symbolic link.
803 * We need to know that because for symbolic links,
804 * we want to use the orginal file name, while for
805 * regular files, we want to use the real path.
806 */
807 if (lstat(infile, &st) == -1) {
808 exitcode = (int)MANDOCLEVEL_BADARG;
809 say(infile, "&lstat");
810 return;
811 } else if (S_ISREG(st.st_mode) == 0 && S_ISLNK(st.st_mode) == 0) {
812 exitcode = (int)MANDOCLEVEL_BADARG;
813 say(infile, "Not a regular file");
814 return;
815 }
816
817 /*
818 * We have to resolve the file name to the real path
819 * in any case for the base directory check.
820 */
821 if ((usefile = realpath(infile, NULL)) == NULL) {
822 exitcode = (int)MANDOCLEVEL_BADARG;
823 say(infile, "&realpath");
824 return;
825 }
826
827 if (op == OP_TEST)
828 start = usefile;
829 else if (strncmp(usefile, basedir, basedir_len) == 0)
830 start = usefile + basedir_len;
831 #ifdef READ_ALLOWED_PATH
832 else if (read_allowed(usefile))
833 start = usefile;
834 #endif
835 else {
836 exitcode = (int)MANDOCLEVEL_BADARG;
837 say("", "%s: outside base directory", infile);
838 free(usefile);
839 return;
840 }
841
842 /*
843 * Now we are sure the file is inside our tree.
844 * If it is a symbolic link, ignore the real path
845 * and use the original name.
846 */
847 do {
848 if (S_ISLNK(st.st_mode) == 0)
849 break;
850
851 /*
852 * Some implementations of realpath(3) may succeed
853 * even if the target of the link does not exist,
854 * so check again for extra safety.
855 */
856 if (stat(usefile, &st) == -1) {
857 exitcode = (int)MANDOCLEVEL_BADARG;
858 say(infile, "&stat");
859 free(usefile);
860 return;
861 }
862 linkfile = mandoc_strdup(infile);
863 if (op == OP_TEST) {
864 free(usefile);
865 start = usefile = linkfile;
866 break;
867 }
868 if (strncmp(infile, basedir, basedir_len) == 0) {
869 free(usefile);
870 usefile = linkfile;
871 start = usefile + basedir_len;
872 break;
873 }
874
875 /*
876 * This symbolic link points into the basedir
877 * from the outside. Let's see whether any of
878 * the parent directories resolve to the basedir.
879 */
880 p = strchr(linkfile, '\0');
881 do {
882 while (*--p != '/')
883 continue;
884 *p = '\0';
885 if ((realdir = realpath(linkfile, NULL)) == NULL) {
886 exitcode = (int)MANDOCLEVEL_BADARG;
887 say(infile, "&realpath");
888 free(linkfile);
889 free(usefile);
890 return;
891 }
892 realdir_len = strlen(realdir) + 1;
893 free(realdir);
894 *p = '/';
895 } while (realdir_len > basedir_len);
896
897 /*
898 * If one of the directories resolves to the basedir,
899 * use the rest of the original name.
900 * Otherwise, the best we can do
901 * is to use the filename pointed to.
902 */
903 if (realdir_len == basedir_len) {
904 free(usefile);
905 usefile = linkfile;
906 start = p + 1;
907 } else {
908 free(linkfile);
909 start = usefile + basedir_len;
910 }
911 } while (/* CONSTCOND */ 0);
912
913 mlink = mandoc_calloc(1, sizeof(struct mlink));
914 mlink->dform = FORM_NONE;
915 if (strlcpy(mlink->file, start, sizeof(mlink->file)) >=
916 sizeof(mlink->file)) {
917 say(start, "Filename too long");
918 free(mlink);
919 free(usefile);
920 return;
921 }
922
923 /*
924 * In test mode or when the original name is absolute
925 * but outside our tree, guess the base directory.
926 */
927
928 if (op == OP_TEST || (start == usefile && *start == '/')) {
929 if (strncmp(usefile, "man/", 4) == 0)
930 start = usefile + 4;
931 else if ((start = strstr(usefile, "/man/")) != NULL)
932 start += 5;
933 else
934 start = usefile;
935 }
936
937 /*
938 * First try to guess our directory structure.
939 * If we find a separator, try to look for man* or cat*.
940 * If we find one of these and what's underneath is a directory,
941 * assume it's an architecture.
942 */
943 if ((p = strchr(start, '/')) != NULL) {
944 *p++ = '\0';
945 if (strncmp(start, "man", 3) == 0) {
946 mlink->dform = FORM_SRC;
947 mlink->dsec = start + 3;
948 } else if (strncmp(start, "cat", 3) == 0) {
949 mlink->dform = FORM_CAT;
950 mlink->dsec = start + 3;
951 }
952
953 start = p;
954 if (mlink->dsec != NULL && (p = strchr(start, '/')) != NULL) {
955 *p++ = '\0';
956 mlink->arch = start;
957 start = p;
958 }
959 }
960
961 /*
962 * Now check the file suffix.
963 * Suffix of `.0' indicates a catpage, `.1-9' is a manpage.
964 */
965 p = strrchr(start, '\0');
966 while (p-- > start && *p != '/' && *p != '.')
967 continue;
968
969 if (*p == '.') {
970 *p++ = '\0';
971 mlink->fsec = p;
972 }
973
974 /*
975 * Now try to parse the name.
976 * Use the filename portion of the path.
977 */
978 mlink->name = start;
979 if ((p = strrchr(start, '/')) != NULL) {
980 mlink->name = p + 1;
981 *p = '\0';
982 }
983 mlink_add(mlink, &st);
984 free(usefile);
985 }
986
987 static void
988 mlink_add(struct mlink *mlink, const struct stat *st)
989 {
990 struct inodev inodev;
991 struct mpage *mpage;
992 unsigned int slot;
993
994 assert(NULL != mlink->file);
995
996 mlink->dsec = mandoc_strdup(mlink->dsec ? mlink->dsec : "");
997 mlink->arch = mandoc_strdup(mlink->arch ? mlink->arch : "");
998 mlink->name = mandoc_strdup(mlink->name ? mlink->name : "");
999 mlink->fsec = mandoc_strdup(mlink->fsec ? mlink->fsec : "");
1000
1001 if ('0' == *mlink->fsec) {
1002 free(mlink->fsec);
1003 mlink->fsec = mandoc_strdup(mlink->dsec);
1004 mlink->fform = FORM_CAT;
1005 } else if ('1' <= *mlink->fsec && '9' >= *mlink->fsec)
1006 mlink->fform = FORM_SRC;
1007 else
1008 mlink->fform = FORM_NONE;
1009
1010 slot = ohash_qlookup(&mlinks, mlink->file);
1011 assert(NULL == ohash_find(&mlinks, slot));
1012 ohash_insert(&mlinks, slot, mlink);
1013
1014 memset(&inodev, 0, sizeof(inodev)); /* Clear padding. */
1015 inodev.st_ino = st->st_ino;
1016 inodev.st_dev = st->st_dev;
1017 slot = ohash_lookup_memory(&mpages, (char *)&inodev,
1018 sizeof(struct inodev), inodev.st_ino);
1019 mpage = ohash_find(&mpages, slot);
1020 if (NULL == mpage) {
1021 mpage = mandoc_calloc(1, sizeof(struct mpage));
1022 mpage->inodev.st_ino = inodev.st_ino;
1023 mpage->inodev.st_dev = inodev.st_dev;
1024 mpage->form = FORM_NONE;
1025 mpage->next = mpage_head;
1026 mpage_head = mpage;
1027 ohash_insert(&mpages, slot, mpage);
1028 } else
1029 mlink->next = mpage->mlinks;
1030 mpage->mlinks = mlink;
1031 mlink->mpage = mpage;
1032 }
1033
1034 static void
1035 mlink_free(struct mlink *mlink)
1036 {
1037
1038 free(mlink->dsec);
1039 free(mlink->arch);
1040 free(mlink->name);
1041 free(mlink->fsec);
1042 free(mlink);
1043 }
1044
1045 static void
1046 mpages_free(void)
1047 {
1048 struct mpage *mpage;
1049 struct mlink *mlink;
1050
1051 while ((mpage = mpage_head) != NULL) {
1052 while ((mlink = mpage->mlinks) != NULL) {
1053 mpage->mlinks = mlink->next;
1054 mlink_free(mlink);
1055 }
1056 mpage_head = mpage->next;
1057 free(mpage->sec);
1058 free(mpage->arch);
1059 free(mpage->title);
1060 free(mpage->desc);
1061 free(mpage);
1062 }
1063 }
1064
1065 /*
1066 * For each mlink to the mpage, check whether the path looks like
1067 * it is formatted, and if it does, check whether a source manual
1068 * exists by the same name, ignoring the suffix.
1069 * If both conditions hold, drop the mlink.
1070 */
1071 static void
1072 mlinks_undupe(struct mpage *mpage)
1073 {
1074 char buf[PATH_MAX];
1075 struct mlink **prev;
1076 struct mlink *mlink;
1077 char *bufp;
1078
1079 mpage->form = FORM_CAT;
1080 prev = &mpage->mlinks;
1081 while (NULL != (mlink = *prev)) {
1082 if (FORM_CAT != mlink->dform) {
1083 mpage->form = FORM_NONE;
1084 goto nextlink;
1085 }
1086 (void)strlcpy(buf, mlink->file, sizeof(buf));
1087 bufp = strstr(buf, "cat");
1088 assert(NULL != bufp);
1089 memcpy(bufp, "man", 3);
1090 if (NULL != (bufp = strrchr(buf, '.')))
1091 *++bufp = '\0';
1092 (void)strlcat(buf, mlink->dsec, sizeof(buf));
1093 if (NULL == ohash_find(&mlinks,
1094 ohash_qlookup(&mlinks, buf)))
1095 goto nextlink;
1096 if (warnings)
1097 say(mlink->file, "Man source exists: %s", buf);
1098 if (use_all)
1099 goto nextlink;
1100 *prev = mlink->next;
1101 mlink_free(mlink);
1102 continue;
1103 nextlink:
1104 prev = &(*prev)->next;
1105 }
1106 }
1107
1108 static void
1109 mlink_check(struct mpage *mpage, struct mlink *mlink)
1110 {
1111 struct str *str;
1112 unsigned int slot;
1113
1114 /*
1115 * Check whether the manual section given in a file
1116 * agrees with the directory where the file is located.
1117 * Some manuals have suffixes like (3p) on their
1118 * section number either inside the file or in the
1119 * directory name, some are linked into more than one
1120 * section, like encrypt(1) = makekey(8).
1121 */
1122
1123 if (FORM_SRC == mpage->form &&
1124 strcasecmp(mpage->sec, mlink->dsec))
1125 say(mlink->file, "Section \"%s\" manual in %s directory",
1126 mpage->sec, mlink->dsec);
1127
1128 /*
1129 * Manual page directories exist for each kernel
1130 * architecture as returned by machine(1).
1131 * However, many manuals only depend on the
1132 * application architecture as returned by arch(1).
1133 * For example, some (2/ARM) manuals are shared
1134 * across the "armish" and "zaurus" kernel
1135 * architectures.
1136 * A few manuals are even shared across completely
1137 * different architectures, for example fdformat(1)
1138 * on amd64, i386, and sparc64.
1139 */
1140
1141 if (strcasecmp(mpage->arch, mlink->arch))
1142 say(mlink->file, "Architecture \"%s\" manual in "
1143 "\"%s\" directory", mpage->arch, mlink->arch);
1144
1145 /*
1146 * XXX
1147 * parse_cat() doesn't set NAME_TITLE yet.
1148 */
1149
1150 if (FORM_CAT == mpage->form)
1151 return;
1152
1153 /*
1154 * Check whether this mlink
1155 * appears as a name in the NAME section.
1156 */
1157
1158 slot = ohash_qlookup(&names, mlink->name);
1159 str = ohash_find(&names, slot);
1160 assert(NULL != str);
1161 if ( ! (NAME_TITLE & str->mask))
1162 say(mlink->file, "Name missing in NAME section");
1163 }
1164
1165 /*
1166 * Run through the files in the global vector "mpages"
1167 * and add them to the database specified in "basedir".
1168 *
1169 * This handles the parsing scheme itself, using the cues of directory
1170 * and filename to determine whether the file is parsable or not.
1171 */
1172 static void
1173 mpages_merge(struct dba *dba, struct mparse *mp)
1174 {
1175 struct mpage *mpage, *mpage_dest;
1176 struct mlink *mlink, *mlink_dest;
1177 struct roff_meta *meta;
1178 char *cp;
1179 int fd;
1180
1181 for (mpage = mpage_head; mpage != NULL; mpage = mpage->next) {
1182 mlinks_undupe(mpage);
1183 if ((mlink = mpage->mlinks) == NULL)
1184 continue;
1185
1186 name_mask = NAME_MASK;
1187 mandoc_ohash_init(&names, 4, offsetof(struct str, key));
1188 mandoc_ohash_init(&strings, 6, offsetof(struct str, key));
1189 mparse_reset(mp);
1190 meta = NULL;
1191
1192 if ((fd = mparse_open(mp, mlink->file)) == -1) {
1193 say(mlink->file, "&open");
1194 goto nextpage;
1195 }
1196
1197 /*
1198 * Interpret the file as mdoc(7) or man(7) source
1199 * code, unless it is known to be formatted.
1200 */
1201 if (mlink->dform != FORM_CAT || mlink->fform != FORM_CAT) {
1202 mparse_readfd(mp, fd, mlink->file);
1203 close(fd);
1204 fd = -1;
1205 meta = mparse_result(mp);
1206 }
1207
1208 if (meta != NULL && meta->sodest != NULL) {
1209 mlink_dest = ohash_find(&mlinks,
1210 ohash_qlookup(&mlinks, meta->sodest));
1211 if (mlink_dest == NULL) {
1212 mandoc_asprintf(&cp, "%s.gz", meta->sodest);
1213 mlink_dest = ohash_find(&mlinks,
1214 ohash_qlookup(&mlinks, cp));
1215 free(cp);
1216 }
1217 if (mlink_dest != NULL) {
1218
1219 /* The .so target exists. */
1220
1221 mpage_dest = mlink_dest->mpage;
1222 while (1) {
1223 mlink->mpage = mpage_dest;
1224
1225 /*
1226 * If the target was already
1227 * processed, add the links
1228 * to the database now.
1229 * Otherwise, this will
1230 * happen when we come
1231 * to the target.
1232 */
1233
1234 if (mpage_dest->dba != NULL)
1235 dbadd_mlink(mlink);
1236
1237 if (mlink->next == NULL)
1238 break;
1239 mlink = mlink->next;
1240 }
1241
1242 /* Move all links to the target. */
1243
1244 mlink->next = mlink_dest->next;
1245 mlink_dest->next = mpage->mlinks;
1246 mpage->mlinks = NULL;
1247 goto nextpage;
1248 }
1249 meta->macroset = MACROSET_NONE;
1250 }
1251 if (meta != NULL && meta->macroset == MACROSET_MDOC) {
1252 mpage->form = FORM_SRC;
1253 mpage->sec = meta->msec;
1254 mpage->sec = mandoc_strdup(
1255 mpage->sec == NULL ? "" : mpage->sec);
1256 mpage->arch = meta->arch;
1257 mpage->arch = mandoc_strdup(
1258 mpage->arch == NULL ? "" : mpage->arch);
1259 mpage->title = mandoc_strdup(meta->title);
1260 } else if (meta != NULL && meta->macroset == MACROSET_MAN) {
1261 if (*meta->msec != '\0' || *meta->title != '\0') {
1262 mpage->form = FORM_SRC;
1263 mpage->sec = mandoc_strdup(meta->msec);
1264 mpage->arch = mandoc_strdup(mlink->arch);
1265 mpage->title = mandoc_strdup(meta->title);
1266 } else
1267 meta = NULL;
1268 }
1269
1270 assert(mpage->desc == NULL);
1271 if (meta == NULL || meta->sodest != NULL) {
1272 mpage->sec = mandoc_strdup(mlink->dsec);
1273 mpage->arch = mandoc_strdup(mlink->arch);
1274 mpage->title = mandoc_strdup(mlink->name);
1275 if (meta == NULL) {
1276 mpage->form = FORM_CAT;
1277 parse_cat(mpage, fd);
1278 } else
1279 mpage->form = FORM_SRC;
1280 } else if (meta->macroset == MACROSET_MDOC)
1281 parse_mdoc(mpage, meta, meta->first);
1282 else
1283 parse_man(mpage, meta, meta->first);
1284 if (mpage->desc == NULL) {
1285 mpage->desc = mandoc_strdup(mlink->name);
1286 if (warnings)
1287 say(mlink->file, "No one-line description, "
1288 "using filename \"%s\"", mlink->name);
1289 }
1290
1291 for (mlink = mpage->mlinks;
1292 mlink != NULL;
1293 mlink = mlink->next) {
1294 putkey(mpage, mlink->name, NAME_FILE);
1295 if (warnings && !use_all)
1296 mlink_check(mpage, mlink);
1297 }
1298
1299 dbadd(dba, mpage);
1300
1301 nextpage:
1302 ohash_delete(&strings);
1303 ohash_delete(&names);
1304 }
1305 }
1306
1307 static void
1308 parse_cat(struct mpage *mpage, int fd)
1309 {
1310 FILE *stream;
1311 struct mlink *mlink;
1312 char *line, *p, *title, *sec;
1313 size_t linesz, plen, titlesz;
1314 ssize_t len;
1315 int offs;
1316
1317 mlink = mpage->mlinks;
1318 stream = fd == -1 ? fopen(mlink->file, "r") : fdopen(fd, "r");
1319 if (stream == NULL) {
1320 if (fd != -1)
1321 close(fd);
1322 if (warnings)
1323 say(mlink->file, "&fopen");
1324 return;
1325 }
1326
1327 line = NULL;
1328 linesz = 0;
1329
1330 /* Parse the section number from the header line. */
1331
1332 while (getline(&line, &linesz, stream) != -1) {
1333 if (*line == '\n')
1334 continue;
1335 if ((sec = strchr(line, '(')) == NULL)
1336 break;
1337 if ((p = strchr(++sec, ')')) == NULL)
1338 break;
1339 free(mpage->sec);
1340 mpage->sec = mandoc_strndup(sec, p - sec);
1341 if (warnings && *mlink->dsec != '\0' &&
1342 strcasecmp(mpage->sec, mlink->dsec))
1343 say(mlink->file,
1344 "Section \"%s\" manual in %s directory",
1345 mpage->sec, mlink->dsec);
1346 break;
1347 }
1348
1349 /* Skip to first blank line. */
1350
1351 while (line == NULL || *line != '\n')
1352 if (getline(&line, &linesz, stream) == -1)
1353 break;
1354
1355 /*
1356 * Assume the first line that is not indented
1357 * is the first section header. Skip to it.
1358 */
1359
1360 while (getline(&line, &linesz, stream) != -1)
1361 if (*line != '\n' && *line != ' ')
1362 break;
1363
1364 /*
1365 * Read up until the next section into a buffer.
1366 * Strip the leading and trailing newline from each read line,
1367 * appending a trailing space.
1368 * Ignore empty (whitespace-only) lines.
1369 */
1370
1371 titlesz = 0;
1372 title = NULL;
1373
1374 while ((len = getline(&line, &linesz, stream)) != -1) {
1375 if (*line != ' ')
1376 break;
1377 offs = 0;
1378 while (isspace((unsigned char)line[offs]))
1379 offs++;
1380 if (line[offs] == '\0')
1381 continue;
1382 title = mandoc_realloc(title, titlesz + len - offs);
1383 memcpy(title + titlesz, line + offs, len - offs);
1384 titlesz += len - offs;
1385 title[titlesz - 1] = ' ';
1386 }
1387 free(line);
1388
1389 /*
1390 * If no page content can be found, or the input line
1391 * is already the next section header, or there is no
1392 * trailing newline, reuse the page title as the page
1393 * description.
1394 */
1395
1396 if (NULL == title || '\0' == *title) {
1397 if (warnings)
1398 say(mlink->file, "Cannot find NAME section");
1399 fclose(stream);
1400 free(title);
1401 return;
1402 }
1403
1404 title[titlesz - 1] = '\0';
1405
1406 /*
1407 * Skip to the first dash.
1408 * Use the remaining line as the description (no more than 70
1409 * bytes).
1410 */
1411
1412 if (NULL != (p = strstr(title, "- "))) {
1413 for (p += 2; ' ' == *p || '\b' == *p; p++)
1414 /* Skip to next word. */ ;
1415 } else {
1416 if (warnings)
1417 say(mlink->file, "No dash in title line, "
1418 "reusing \"%s\" as one-line description", title);
1419 p = title;
1420 }
1421
1422 plen = strlen(p);
1423
1424 /* Strip backspace-encoding from line. */
1425
1426 while (NULL != (line = memchr(p, '\b', plen))) {
1427 len = line - p;
1428 if (0 == len) {
1429 memmove(line, line + 1, plen--);
1430 continue;
1431 }
1432 memmove(line - 1, line + 1, plen - len);
1433 plen -= 2;
1434 }
1435
1436 /*
1437 * Cut off excessive one-line descriptions.
1438 * Bad pages are not worth better heuristics.
1439 */
1440
1441 mpage->desc = mandoc_strndup(p, 150);
1442 fclose(stream);
1443 free(title);
1444 }
1445
1446 /*
1447 * Put a type/word pair into the word database for this particular file.
1448 */
1449 static void
1450 putkey(const struct mpage *mpage, char *value, uint64_t type)
1451 {
1452 putkeys(mpage, value, strlen(value), type);
1453 }
1454
1455 /*
1456 * Grok all nodes at or below a certain mdoc node into putkey().
1457 */
1458 static void
1459 putmdockey(const struct mpage *mpage,
1460 const struct roff_node *n, uint64_t m, int taboo)
1461 {
1462
1463 for ( ; NULL != n; n = n->next) {
1464 if (n->flags & taboo)
1465 continue;
1466 if (NULL != n->child)
1467 putmdockey(mpage, n->child, m, taboo);
1468 if (n->type == ROFFT_TEXT)
1469 putkey(mpage, n->string, m);
1470 }
1471 }
1472
1473 static void
1474 parse_man(struct mpage *mpage, const struct roff_meta *meta,
1475 const struct roff_node *n)
1476 {
1477 const struct roff_node *head, *body;
1478 char *start, *title;
1479 char byte;
1480 size_t sz;
1481
1482 if (n == NULL)
1483 return;
1484
1485 /*
1486 * We're only searching for one thing: the first text child in
1487 * the BODY of a NAME section. Since we don't keep track of
1488 * sections in -man, run some hoops to find out whether we're in
1489 * the correct section or not.
1490 */
1491
1492 if (n->type == ROFFT_BODY && n->tok == MAN_SH) {
1493 body = n;
1494 if ((head = body->parent->head) != NULL &&
1495 (head = head->child) != NULL &&
1496 head->next == NULL &&
1497 head->type == ROFFT_TEXT &&
1498 strcmp(head->string, "NAME") == 0 &&
1499 body->child != NULL) {
1500
1501 /*
1502 * Suck the entire NAME section into memory.
1503 * Yes, we might run away.
1504 * But too many manuals have big, spread-out
1505 * NAME sections over many lines.
1506 */
1507
1508 title = NULL;
1509 deroff(&title, body);
1510 if (NULL == title)
1511 return;
1512
1513 /*
1514 * Go through a special heuristic dance here.
1515 * Conventionally, one or more manual names are
1516 * comma-specified prior to a whitespace, then a
1517 * dash, then a description. Try to puzzle out
1518 * the name parts here.
1519 */
1520
1521 start = title;
1522 for ( ;; ) {
1523 sz = strcspn(start, " ,");
1524 if ('\0' == start[sz])
1525 break;
1526
1527 byte = start[sz];
1528 start[sz] = '\0';
1529
1530 /*
1531 * Assume a stray trailing comma in the
1532 * name list if a name begins with a dash.
1533 */
1534
1535 if ('-' == start[0] ||
1536 ('\\' == start[0] && '-' == start[1]))
1537 break;
1538
1539 putkey(mpage, start, NAME_TITLE);
1540 if ( ! (mpage->name_head_done ||
1541 strcasecmp(start, meta->title))) {
1542 putkey(mpage, start, NAME_HEAD);
1543 mpage->name_head_done = 1;
1544 }
1545
1546 if (' ' == byte) {
1547 start += sz + 1;
1548 break;
1549 }
1550
1551 assert(',' == byte);
1552 start += sz + 1;
1553 while (' ' == *start)
1554 start++;
1555 }
1556
1557 if (start == title) {
1558 putkey(mpage, start, NAME_TITLE);
1559 if ( ! (mpage->name_head_done ||
1560 strcasecmp(start, meta->title))) {
1561 putkey(mpage, start, NAME_HEAD);
1562 mpage->name_head_done = 1;
1563 }
1564 free(title);
1565 return;
1566 }
1567
1568 while (isspace((unsigned char)*start))
1569 start++;
1570
1571 if (0 == strncmp(start, "-", 1))
1572 start += 1;
1573 else if (0 == strncmp(start, "\\-\\-", 4))
1574 start += 4;
1575 else if (0 == strncmp(start, "\\-", 2))
1576 start += 2;
1577 else if (0 == strncmp(start, "\\(en", 4))
1578 start += 4;
1579 else if (0 == strncmp(start, "\\(em", 4))
1580 start += 4;
1581
1582 while (' ' == *start)
1583 start++;
1584
1585 /*
1586 * Cut off excessive one-line descriptions.
1587 * Bad pages are not worth better heuristics.
1588 */
1589
1590 mpage->desc = mandoc_strndup(start, 150);
1591 free(title);
1592 return;
1593 }
1594 }
1595
1596 for (n = n->child; n; n = n->next) {
1597 if (NULL != mpage->desc)
1598 break;
1599 parse_man(mpage, meta, n);
1600 }
1601 }
1602
1603 static void
1604 parse_mdoc(struct mpage *mpage, const struct roff_meta *meta,
1605 const struct roff_node *n)
1606 {
1607 const struct mdoc_handler *handler;
1608
1609 for (n = n->child; n != NULL; n = n->next) {
1610 if (n->tok == TOKEN_NONE || n->tok < ROFF_MAX)
1611 continue;
1612 assert(n->tok >= MDOC_Dd && n->tok < MDOC_MAX);
1613 handler = mdoc_handlers + (n->tok - MDOC_Dd);
1614 if (n->flags & handler->taboo)
1615 continue;
1616
1617 switch (n->type) {
1618 case ROFFT_ELEM:
1619 case ROFFT_BLOCK:
1620 case ROFFT_HEAD:
1621 case ROFFT_BODY:
1622 case ROFFT_TAIL:
1623 if (handler->fp != NULL &&
1624 (*handler->fp)(mpage, meta, n) == 0)
1625 break;
1626 if (handler->mask)
1627 putmdockey(mpage, n->child,
1628 handler->mask, handler->taboo);
1629 break;
1630 default:
1631 continue;
1632 }
1633 if (NULL != n->child)
1634 parse_mdoc(mpage, meta, n);
1635 }
1636 }
1637
1638 static int
1639 parse_mdoc_Fa(struct mpage *mpage, const struct roff_meta *meta,
1640 const struct roff_node *n)
1641 {
1642 uint64_t mask;
1643
1644 mask = TYPE_Fa;
1645 if (n->sec == SEC_SYNOPSIS)
1646 mask |= TYPE_Vt;
1647
1648 putmdockey(mpage, n->child, mask, 0);
1649 return 0;
1650 }
1651
1652 static int
1653 parse_mdoc_Fd(struct mpage *mpage, const struct roff_meta *meta,
1654 const struct roff_node *n)
1655 {
1656 char *start, *end;
1657 size_t sz;
1658
1659 if (SEC_SYNOPSIS != n->sec ||
1660 NULL == (n = n->child) ||
1661 n->type != ROFFT_TEXT)
1662 return 0;
1663
1664 /*
1665 * Only consider those `Fd' macro fields that begin with an
1666 * "inclusion" token (versus, e.g., #define).
1667 */
1668
1669 if (strcmp("#include", n->string))
1670 return 0;
1671
1672 if ((n = n->next) == NULL || n->type != ROFFT_TEXT)
1673 return 0;
1674
1675 /*
1676 * Strip away the enclosing angle brackets and make sure we're
1677 * not zero-length.
1678 */
1679
1680 start = n->string;
1681 if ('<' == *start || '"' == *start)
1682 start++;
1683
1684 if (0 == (sz = strlen(start)))
1685 return 0;
1686
1687 end = &start[(int)sz - 1];
1688 if ('>' == *end || '"' == *end)
1689 end--;
1690
1691 if (end > start)
1692 putkeys(mpage, start, end - start + 1, TYPE_In);
1693 return 0;
1694 }
1695
1696 static void
1697 parse_mdoc_fname(struct mpage *mpage, const struct roff_node *n)
1698 {
1699 char *cp;
1700 size_t sz;
1701
1702 if (n->type != ROFFT_TEXT)
1703 return;
1704
1705 /* Skip function pointer punctuation. */
1706
1707 cp = n->string;
1708 while (*cp == '(' || *cp == '*')
1709 cp++;
1710 sz = strcspn(cp, "()");
1711
1712 putkeys(mpage, cp, sz, TYPE_Fn);
1713 if (n->sec == SEC_SYNOPSIS)
1714 putkeys(mpage, cp, sz, NAME_SYN);
1715 }
1716
1717 static int
1718 parse_mdoc_Fn(struct mpage *mpage, const struct roff_meta *meta,
1719 const struct roff_node *n)
1720 {
1721 uint64_t mask;
1722
1723 if (n->child == NULL)
1724 return 0;
1725
1726 parse_mdoc_fname(mpage, n->child);
1727
1728 n = n->child->next;
1729 if (n != NULL && n->type == ROFFT_TEXT) {
1730 mask = TYPE_Fa;
1731 if (n->sec == SEC_SYNOPSIS)
1732 mask |= TYPE_Vt;
1733 putmdockey(mpage, n, mask, 0);
1734 }
1735
1736 return 0;
1737 }
1738
1739 static int
1740 parse_mdoc_Fo(struct mpage *mpage, const struct roff_meta *meta,
1741 const struct roff_node *n)
1742 {
1743
1744 if (n->type != ROFFT_HEAD)
1745 return 1;
1746
1747 if (n->child != NULL)
1748 parse_mdoc_fname(mpage, n->child);
1749
1750 return 0;
1751 }
1752
1753 static int
1754 parse_mdoc_Va(struct mpage *mpage, const struct roff_meta *meta,
1755 const struct roff_node *n)
1756 {
1757 char *cp;
1758
1759 if (n->type != ROFFT_ELEM && n->type != ROFFT_BODY)
1760 return 0;
1761
1762 if (n->child != NULL &&
1763 n->child->next == NULL &&
1764 n->child->type == ROFFT_TEXT)
1765 return 1;
1766
1767 cp = NULL;
1768 deroff(&cp, n);
1769 if (cp != NULL) {
1770 putkey(mpage, cp, TYPE_Vt | (n->tok == MDOC_Va ||
1771 n->type == ROFFT_BODY ? TYPE_Va : 0));
1772 free(cp);
1773 }
1774
1775 return 0;
1776 }
1777
1778 static int
1779 parse_mdoc_Xr(struct mpage *mpage, const struct roff_meta *meta,
1780 const struct roff_node *n)
1781 {
1782 char *cp;
1783
1784 if (NULL == (n = n->child))
1785 return 0;
1786
1787 if (NULL == n->next) {
1788 putkey(mpage, n->string, TYPE_Xr);
1789 return 0;
1790 }
1791
1792 mandoc_asprintf(&cp, "%s(%s)", n->string, n->next->string);
1793 putkey(mpage, cp, TYPE_Xr);
1794 free(cp);
1795 return 0;
1796 }
1797
1798 static int
1799 parse_mdoc_Nd(struct mpage *mpage, const struct roff_meta *meta,
1800 const struct roff_node *n)
1801 {
1802
1803 if (n->type == ROFFT_BODY)
1804 deroff(&mpage->desc, n);
1805 return 0;
1806 }
1807
1808 static int
1809 parse_mdoc_Nm(struct mpage *mpage, const struct roff_meta *meta,
1810 const struct roff_node *n)
1811 {
1812
1813 if (SEC_NAME == n->sec)
1814 putmdockey(mpage, n->child, NAME_TITLE, 0);
1815 else if (n->sec == SEC_SYNOPSIS && n->type == ROFFT_HEAD) {
1816 if (n->child == NULL)
1817 putkey(mpage, meta->name, NAME_SYN);
1818 else
1819 putmdockey(mpage, n->child, NAME_SYN, 0);
1820 }
1821 if ( ! (mpage->name_head_done ||
1822 n->child == NULL || n->child->string == NULL ||
1823 strcasecmp(n->child->string, meta->title))) {
1824 putkey(mpage, n->child->string, NAME_HEAD);
1825 mpage->name_head_done = 1;
1826 }
1827 return 0;
1828 }
1829
1830 static int
1831 parse_mdoc_Sh(struct mpage *mpage, const struct roff_meta *meta,
1832 const struct roff_node *n)
1833 {
1834
1835 return n->sec == SEC_CUSTOM && n->type == ROFFT_HEAD;
1836 }
1837
1838 static int
1839 parse_mdoc_head(struct mpage *mpage, const struct roff_meta *meta,
1840 const struct roff_node *n)
1841 {
1842
1843 return n->type == ROFFT_HEAD;
1844 }
1845
1846 /*
1847 * Add a string to the hash table for the current manual.
1848 * Each string has a bitmask telling which macros it belongs to.
1849 * When we finish the manual, we'll dump the table.
1850 */
1851 static void
1852 putkeys(const struct mpage *mpage, char *cp, size_t sz, uint64_t v)
1853 {
1854 struct ohash *htab;
1855 struct str *s;
1856 const char *end;
1857 unsigned int slot;
1858 int i, mustfree;
1859
1860 if (0 == sz)
1861 return;
1862
1863 mustfree = render_string(&cp, &sz);
1864
1865 if (TYPE_Nm & v) {
1866 htab = &names;
1867 v &= name_mask;
1868 if (v & NAME_FIRST)
1869 name_mask &= ~NAME_FIRST;
1870 if (debug > 1)
1871 say(mpage->mlinks->file,
1872 "Adding name %*s, bits=0x%llx", (int)sz, cp,
1873 (unsigned long long)v);
1874 } else {
1875 htab = &strings;
1876 if (debug > 1)
1877 for (i = 0; i < KEY_MAX; i++)
1878 if ((uint64_t)1 << i & v)
1879 say(mpage->mlinks->file,
1880 "Adding key %s=%*s",
1881 mansearch_keynames[i], (int)sz, cp);
1882 }
1883
1884 end = cp + sz;
1885 slot = ohash_qlookupi(htab, cp, &end);
1886 s = ohash_find(htab, slot);
1887
1888 if (NULL != s && mpage == s->mpage) {
1889 s->mask |= v;
1890 return;
1891 } else if (NULL == s) {
1892 s = mandoc_calloc(1, sizeof(struct str) + sz + 1);
1893 memcpy(s->key, cp, sz);
1894 ohash_insert(htab, slot, s);
1895 }
1896 s->mpage = mpage;
1897 s->mask = v;
1898
1899 if (mustfree)
1900 free(cp);
1901 }
1902
1903 /*
1904 * Take a Unicode codepoint and produce its UTF-8 encoding.
1905 * This isn't the best way to do this, but it works.
1906 * The magic numbers are from the UTF-8 packaging.
1907 * They're not as scary as they seem: read the UTF-8 spec for details.
1908 */
1909 static size_t
1910 utf8(unsigned int cp, char out[7])
1911 {
1912 size_t rc;
1913
1914 rc = 0;
1915 if (cp <= 0x0000007F) {
1916 rc = 1;
1917 out[0] = (char)cp;
1918 } else if (cp <= 0x000007FF) {
1919 rc = 2;
1920 out[0] = (cp >> 6 & 31) | 192;
1921 out[1] = (cp & 63) | 128;
1922 } else if (cp <= 0x0000FFFF) {
1923 rc = 3;
1924 out[0] = (cp >> 12 & 15) | 224;
1925 out[1] = (cp >> 6 & 63) | 128;
1926 out[2] = (cp & 63) | 128;
1927 } else if (cp <= 0x001FFFFF) {
1928 rc = 4;
1929 out[0] = (cp >> 18 & 7) | 240;
1930 out[1] = (cp >> 12 & 63) | 128;
1931 out[2] = (cp >> 6 & 63) | 128;
1932 out[3] = (cp & 63) | 128;
1933 } else if (cp <= 0x03FFFFFF) {
1934 rc = 5;
1935 out[0] = (cp >> 24 & 3) | 248;
1936 out[1] = (cp >> 18 & 63) | 128;
1937 out[2] = (cp >> 12 & 63) | 128;
1938 out[3] = (cp >> 6 & 63) | 128;
1939 out[4] = (cp & 63) | 128;
1940 } else if (cp <= 0x7FFFFFFF) {
1941 rc = 6;
1942 out[0] = (cp >> 30 & 1) | 252;
1943 out[1] = (cp >> 24 & 63) | 128;
1944 out[2] = (cp >> 18 & 63) | 128;
1945 out[3] = (cp >> 12 & 63) | 128;
1946 out[4] = (cp >> 6 & 63) | 128;
1947 out[5] = (cp & 63) | 128;
1948 } else
1949 return 0;
1950
1951 out[rc] = '\0';
1952 return rc;
1953 }
1954
1955 /*
1956 * If the string contains escape sequences,
1957 * replace it with an allocated rendering and return 1,
1958 * such that the caller can free it after use.
1959 * Otherwise, do nothing and return 0.
1960 */
1961 static int
1962 render_string(char **public, size_t *psz)
1963 {
1964 const char *src, *scp, *addcp, *seq;
1965 char *dst;
1966 size_t ssz, dsz, addsz;
1967 char utfbuf[7], res[6];
1968 int seqlen, unicode;
1969
1970 res[0] = '\\';
1971 res[1] = '\t';
1972 res[2] = ASCII_NBRSP;
1973 res[3] = ASCII_HYPH;
1974 res[4] = ASCII_BREAK;
1975 res[5] = '\0';
1976
1977 src = scp = *public;
1978 ssz = *psz;
1979 dst = NULL;
1980 dsz = 0;
1981
1982 while (scp < src + *psz) {
1983
1984 /* Leave normal characters unchanged. */
1985
1986 if (strchr(res, *scp) == NULL) {
1987 if (dst != NULL)
1988 dst[dsz++] = *scp;
1989 scp++;
1990 continue;
1991 }
1992
1993 /*
1994 * Found something that requires replacing,
1995 * make sure we have a destination buffer.
1996 */
1997
1998 if (dst == NULL) {
1999 dst = mandoc_malloc(ssz + 1);
2000 dsz = scp - src;
2001 memcpy(dst, src, dsz);
2002 }
2003
2004 /* Handle single-char special characters. */
2005
2006 switch (*scp) {
2007 case '\\':
2008 break;
2009 case '\t':
2010 case ASCII_NBRSP:
2011 dst[dsz++] = ' ';
2012 scp++;
2013 continue;
2014 case ASCII_HYPH:
2015 dst[dsz++] = '-';
2016 /* FALLTHROUGH */
2017 case ASCII_BREAK:
2018 scp++;
2019 continue;
2020 default:
2021 abort();
2022 }
2023
2024 /*
2025 * Found an escape sequence.
2026 * Read past the slash, then parse it.
2027 * Ignore everything except characters.
2028 */
2029
2030 scp++;
2031 if (mandoc_escape(&scp, &seq, &seqlen) != ESCAPE_SPECIAL)
2032 continue;
2033
2034 /*
2035 * Render the special character
2036 * as either UTF-8 or ASCII.
2037 */
2038
2039 if (write_utf8) {
2040 unicode = mchars_spec2cp(seq, seqlen);
2041 if (unicode <= 0)
2042 continue;
2043 addsz = utf8(unicode, utfbuf);
2044 if (addsz == 0)
2045 continue;
2046 addcp = utfbuf;
2047 } else {
2048 addcp = mchars_spec2str(seq, seqlen, &addsz);
2049 if (addcp == NULL)
2050 continue;
2051 if (*addcp == ASCII_NBRSP) {
2052 addcp = " ";
2053 addsz = 1;
2054 }
2055 }
2056
2057 /* Copy the rendered glyph into the stream. */
2058
2059 ssz += addsz;
2060 dst = mandoc_realloc(dst, ssz + 1);
2061 memcpy(dst + dsz, addcp, addsz);
2062 dsz += addsz;
2063 }
2064 if (dst != NULL) {
2065 *public = dst;
2066 *psz = dsz;
2067 }
2068
2069 /* Trim trailing whitespace and NUL-terminate. */
2070
2071 while (*psz > 0 && (*public)[*psz - 1] == ' ')
2072 --*psz;
2073 if (dst != NULL) {
2074 (*public)[*psz] = '\0';
2075 return 1;
2076 } else
2077 return 0;
2078 }
2079
2080 static void
2081 dbadd_mlink(const struct mlink *mlink)
2082 {
2083 dba_page_alias(mlink->mpage->dba, mlink->name, NAME_FILE);
2084 dba_page_add(mlink->mpage->dba, DBP_SECT, mlink->dsec);
2085 dba_page_add(mlink->mpage->dba, DBP_SECT, mlink->fsec);
2086 dba_page_add(mlink->mpage->dba, DBP_ARCH, mlink->arch);
2087 dba_page_add(mlink->mpage->dba, DBP_FILE, mlink->file);
2088 }
2089
2090 /*
2091 * Flush the current page's terms (and their bits) into the database.
2092 * Also, handle escape sequences at the last possible moment.
2093 */
2094 static void
2095 dbadd(struct dba *dba, struct mpage *mpage)
2096 {
2097 struct mlink *mlink;
2098 struct str *key;
2099 char *cp;
2100 uint64_t mask;
2101 size_t i;
2102 unsigned int slot;
2103 int mustfree;
2104
2105 mlink = mpage->mlinks;
2106
2107 if (nodb) {
2108 for (key = ohash_first(&names, &slot); NULL != key;
2109 key = ohash_next(&names, &slot))
2110 free(key);
2111 for (key = ohash_first(&strings, &slot); NULL != key;
2112 key = ohash_next(&strings, &slot))
2113 free(key);
2114 if (0 == debug)
2115 return;
2116 while (NULL != mlink) {
2117 fputs(mlink->name, stdout);
2118 if (NULL == mlink->next ||
2119 strcmp(mlink->dsec, mlink->next->dsec) ||
2120 strcmp(mlink->fsec, mlink->next->fsec) ||
2121 strcmp(mlink->arch, mlink->next->arch)) {
2122 putchar('(');
2123 if ('\0' == *mlink->dsec)
2124 fputs(mlink->fsec, stdout);
2125 else
2126 fputs(mlink->dsec, stdout);
2127 if ('\0' != *mlink->arch)
2128 printf("/%s", mlink->arch);
2129 putchar(')');
2130 }
2131 mlink = mlink->next;
2132 if (NULL != mlink)
2133 fputs(", ", stdout);
2134 }
2135 printf(" - %s\n", mpage->desc);
2136 return;
2137 }
2138
2139 if (debug)
2140 say(mlink->file, "Adding to database");
2141
2142 cp = mpage->desc;
2143 i = strlen(cp);
2144 mustfree = render_string(&cp, &i);
2145 mpage->dba = dba_page_new(dba->pages,
2146 *mpage->arch == '\0' ? mlink->arch : mpage->arch,
2147 cp, mlink->file, mpage->form);
2148 if (mustfree)
2149 free(cp);
2150 dba_page_add(mpage->dba, DBP_SECT, mpage->sec);
2151
2152 while (mlink != NULL) {
2153 dbadd_mlink(mlink);
2154 mlink = mlink->next;
2155 }
2156
2157 for (key = ohash_first(&names, &slot); NULL != key;
2158 key = ohash_next(&names, &slot)) {
2159 assert(key->mpage == mpage);
2160 dba_page_alias(mpage->dba, key->key, key->mask);
2161 free(key);
2162 }
2163 for (key = ohash_first(&strings, &slot); NULL != key;
2164 key = ohash_next(&strings, &slot)) {
2165 assert(key->mpage == mpage);
2166 i = 0;
2167 for (mask = TYPE_Xr; mask <= TYPE_Lb; mask *= 2) {
2168 if (key->mask & mask)
2169 dba_macro_add(dba->macros, i,
2170 key->key, mpage->dba);
2171 i++;
2172 }
2173 free(key);
2174 }
2175 }
2176
2177 static void
2178 dbprune(struct dba *dba)
2179 {
2180 struct dba_array *page, *files;
2181 char *file;
2182
2183 dba_array_FOREACH(dba->pages, page) {
2184 files = dba_array_get(page, DBP_FILE);
2185 dba_array_FOREACH(files, file) {
2186 if (*file < ' ')
2187 file++;
2188 if (ohash_find(&mlinks, ohash_qlookup(&mlinks,
2189 file)) != NULL) {
2190 if (debug)
2191 say(file, "Deleting from database");
2192 dba_array_del(dba->pages);
2193 break;
2194 }
2195 }
2196 }
2197 }
2198
2199 /*
2200 * Write the database from memory to disk.
2201 */
2202 static void
2203 dbwrite(struct dba *dba)
2204 {
2205 struct stat sb1, sb2;
2206 char tfn[33], *cp1, *cp2;
2207 off_t i;
2208 int fd1, fd2;
2209
2210 /*
2211 * Do not write empty databases, and delete existing ones
2212 * when makewhatis -u causes them to become empty.
2213 */
2214
2215 dba_array_start(dba->pages);
2216 if (dba_array_next(dba->pages) == NULL) {
2217 if (unlink(MANDOC_DB) == -1 && errno != ENOENT)
2218 say(MANDOC_DB, "&unlink");
2219 return;
2220 }
2221
2222 /*
2223 * Build the database in a temporary file,
2224 * then atomically move it into place.
2225 */
2226
2227 if (dba_write(MANDOC_DB "~", dba) != -1) {
2228 if (rename(MANDOC_DB "~", MANDOC_DB) == -1) {
2229 exitcode = (int)MANDOCLEVEL_SYSERR;
2230 say(MANDOC_DB, "&rename");
2231 unlink(MANDOC_DB "~");
2232 }
2233 return;
2234 }
2235
2236 /*
2237 * We lack write permission and cannot replace the database
2238 * file, but let's at least check whether the data changed.
2239 */
2240
2241 (void)strlcpy(tfn, "/tmp/mandocdb.XXXXXXXX", sizeof(tfn));
2242 if (mkdtemp(tfn) == NULL) {
2243 exitcode = (int)MANDOCLEVEL_SYSERR;
2244 say("", "&%s", tfn);
2245 return;
2246 }
2247 cp1 = cp2 = MAP_FAILED;
2248 fd1 = fd2 = -1;
2249 (void)strlcat(tfn, "/" MANDOC_DB, sizeof(tfn));
2250 if (dba_write(tfn, dba) == -1) {
2251 say(tfn, "&dba_write");
2252 goto err;
2253 }
2254 if ((fd1 = open(MANDOC_DB, O_RDONLY, 0)) == -1) {
2255 say(MANDOC_DB, "&open");
2256 goto err;
2257 }
2258 if ((fd2 = open(tfn, O_RDONLY, 0)) == -1) {
2259 say(tfn, "&open");
2260 goto err;
2261 }
2262 if (fstat(fd1, &sb1) == -1) {
2263 say(MANDOC_DB, "&fstat");
2264 goto err;
2265 }
2266 if (fstat(fd2, &sb2) == -1) {
2267 say(tfn, "&fstat");
2268 goto err;
2269 }
2270 if (sb1.st_size != sb2.st_size)
2271 goto err;
2272 if ((cp1 = mmap(NULL, sb1.st_size, PROT_READ, MAP_PRIVATE,
2273 fd1, 0)) == MAP_FAILED) {
2274 say(MANDOC_DB, "&mmap");
2275 goto err;
2276 }
2277 if ((cp2 = mmap(NULL, sb2.st_size, PROT_READ, MAP_PRIVATE,
2278 fd2, 0)) == MAP_FAILED) {
2279 say(tfn, "&mmap");
2280 goto err;
2281 }
2282 for (i = 0; i < sb1.st_size; i++)
2283 if (cp1[i] != cp2[i])
2284 goto err;
2285 goto out;
2286
2287 err:
2288 exitcode = (int)MANDOCLEVEL_SYSERR;
2289 say(MANDOC_DB, "Data changed, but cannot replace database");
2290
2291 out:
2292 if (cp1 != MAP_FAILED)
2293 munmap(cp1, sb1.st_size);
2294 if (cp2 != MAP_FAILED)
2295 munmap(cp2, sb2.st_size);
2296 if (fd1 != -1)
2297 close(fd1);
2298 if (fd2 != -1)
2299 close(fd2);
2300 unlink(tfn);
2301 *strrchr(tfn, '/') = '\0';
2302 rmdir(tfn);
2303 }
2304
2305 static int
2306 set_basedir(const char *targetdir, int report_baddir)
2307 {
2308 static char startdir[PATH_MAX];
2309 static int getcwd_status; /* 1 = ok, 2 = failure */
2310 static int chdir_status; /* 1 = changed directory */
2311
2312 /*
2313 * Remember the original working directory, if possible.
2314 * This will be needed if the second or a later directory
2315 * on the command line is given as a relative path.
2316 * Do not error out if the current directory is not
2317 * searchable: Maybe it won't be needed after all.
2318 */
2319 if (getcwd_status == 0) {
2320 if (getcwd(startdir, sizeof(startdir)) == NULL) {
2321 getcwd_status = 2;
2322 (void)strlcpy(startdir, strerror(errno),
2323 sizeof(startdir));
2324 } else
2325 getcwd_status = 1;
2326 }
2327
2328 /*
2329 * We are leaving the old base directory.
2330 * Do not use it any longer, not even for messages.
2331 */
2332 *basedir = '\0';
2333 basedir_len = 0;
2334
2335 /*
2336 * If and only if the directory was changed earlier and
2337 * the next directory to process is given as a relative path,
2338 * first go back, or bail out if that is impossible.
2339 */
2340 if (chdir_status && *targetdir != '/') {
2341 if (getcwd_status == 2) {
2342 exitcode = (int)MANDOCLEVEL_SYSERR;
2343 say("", "getcwd: %s", startdir);
2344 return 0;
2345 }
2346 if (chdir(startdir) == -1) {
2347 exitcode = (int)MANDOCLEVEL_SYSERR;
2348 say("", "&chdir %s", startdir);
2349 return 0;
2350 }
2351 }
2352
2353 /*
2354 * Always resolve basedir to the canonicalized absolute
2355 * pathname and append a trailing slash, such that
2356 * we can reliably check whether files are inside.
2357 */
2358 if (realpath(targetdir, basedir) == NULL) {
2359 if (report_baddir || errno != ENOENT) {
2360 exitcode = (int)MANDOCLEVEL_BADARG;
2361 say("", "&%s: realpath", targetdir);
2362 }
2363 *basedir = '\0';
2364 return 0;
2365 } else if (chdir(basedir) == -1) {
2366 if (report_baddir || errno != ENOENT) {
2367 exitcode = (int)MANDOCLEVEL_BADARG;
2368 say("", "&chdir");
2369 }
2370 *basedir = '\0';
2371 return 0;
2372 }
2373 chdir_status = 1;
2374 basedir_len = strlen(basedir);
2375 if (basedir[basedir_len - 1] != '/') {
2376 if (basedir_len >= PATH_MAX - 1) {
2377 exitcode = (int)MANDOCLEVEL_SYSERR;
2378 say("", "Filename too long");
2379 *basedir = '\0';
2380 basedir_len = 0;
2381 return 0;
2382 }
2383 basedir[basedir_len++] = '/';
2384 basedir[basedir_len] = '\0';
2385 }
2386 return 1;
2387 }
2388
2389 #ifdef READ_ALLOWED_PATH
2390 static int
2391 read_allowed(const char *candidate)
2392 {
2393 const char *cp;
2394 size_t len;
2395
2396 for (cp = READ_ALLOWED_PATH;; cp += len) {
2397 while (*cp == ':')
2398 cp++;
2399 if (*cp == '\0')
2400 return 0;
2401 len = strcspn(cp, ":");
2402 if (strncmp(candidate, cp, len) == 0)
2403 return 1;
2404 }
2405 }
2406 #endif
2407
2408 static void
2409 say(const char *file, const char *format, ...)
2410 {
2411 va_list ap;
2412 int use_errno;
2413
2414 if (*basedir != '\0')
2415 fprintf(stderr, "%s", basedir);
2416 if (*basedir != '\0' && *file != '\0')
2417 fputc('/', stderr);
2418 if (*file != '\0')
2419 fprintf(stderr, "%s", file);
2420
2421 use_errno = 1;
2422 if (format != NULL) {
2423 switch (*format) {
2424 case '&':
2425 format++;
2426 break;
2427 case '\0':
2428 format = NULL;
2429 break;
2430 default:
2431 use_errno = 0;
2432 break;
2433 }
2434 }
2435 if (format != NULL) {
2436 if (*basedir != '\0' || *file != '\0')
2437 fputs(": ", stderr);
2438 va_start(ap, format);
2439 vfprintf(stderr, format, ap);
2440 va_end(ap);
2441 }
2442 if (use_errno) {
2443 if (*basedir != '\0' || *file != '\0' || format != NULL)
2444 fputs(": ", stderr);
2445 perror(NULL);
2446 } else
2447 fputc('\n', stderr);
2448 }
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