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Now that the NODE_NOFILL flag in the syntax tree is accurate,
[mandoc.git] / mandocdb.c
1 /* $Id: mandocdb.c,v 1.262 2018/12/30 00:49:55 schwarze Exp $ */
2 /*
3 * Copyright (c) 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2011-2018 Ingo Schwarze <schwarze@openbsd.org>
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 #include "config.h"
20
21 #include <sys/types.h>
22 #include <sys/mman.h>
23 #include <sys/stat.h>
24
25 #include <assert.h>
26 #include <ctype.h>
27 #if HAVE_ERR
28 #include <err.h>
29 #endif
30 #include <errno.h>
31 #include <fcntl.h>
32 #if HAVE_FTS
33 #include <fts.h>
34 #else
35 #include "compat_fts.h"
36 #endif
37 #include <limits.h>
38 #if HAVE_SANDBOX_INIT
39 #include <sandbox.h>
40 #endif
41 #include <stdarg.h>
42 #include <stddef.h>
43 #include <stdio.h>
44 #include <stdint.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <unistd.h>
48
49 #include "mandoc_aux.h"
50 #include "mandoc_ohash.h"
51 #include "mandoc.h"
52 #include "roff.h"
53 #include "mdoc.h"
54 #include "man.h"
55 #include "mandoc_parse.h"
56 #include "manconf.h"
57 #include "mansearch.h"
58 #include "dba_array.h"
59 #include "dba.h"
60
61 extern const char *const mansearch_keynames[];
62
63 enum op {
64 OP_DEFAULT = 0, /* new dbs from dir list or default config */
65 OP_CONFFILE, /* new databases from custom config file */
66 OP_UPDATE, /* delete/add entries in existing database */
67 OP_DELETE, /* delete entries from existing database */
68 OP_TEST /* change no databases, report potential problems */
69 };
70
71 struct str {
72 const struct mpage *mpage; /* if set, the owning parse */
73 uint64_t mask; /* bitmask in sequence */
74 char key[]; /* rendered text */
75 };
76
77 struct inodev {
78 ino_t st_ino;
79 dev_t st_dev;
80 };
81
82 struct mpage {
83 struct inodev inodev; /* used for hashing routine */
84 struct dba_array *dba;
85 char *sec; /* section from file content */
86 char *arch; /* architecture from file content */
87 char *title; /* title from file content */
88 char *desc; /* description from file content */
89 struct mpage *next; /* singly linked list */
90 struct mlink *mlinks; /* singly linked list */
91 int name_head_done;
92 enum form form; /* format from file content */
93 };
94
95 struct mlink {
96 char file[PATH_MAX]; /* filename rel. to manpath */
97 char *dsec; /* section from directory */
98 char *arch; /* architecture from directory */
99 char *name; /* name from file name (not empty) */
100 char *fsec; /* section from file name suffix */
101 struct mlink *next; /* singly linked list */
102 struct mpage *mpage; /* parent */
103 int gzip; /* filename has a .gz suffix */
104 enum form dform; /* format from directory */
105 enum form fform; /* format from file name suffix */
106 };
107
108 typedef int (*mdoc_fp)(struct mpage *, const struct roff_meta *,
109 const struct roff_node *);
110
111 struct mdoc_handler {
112 mdoc_fp fp; /* optional handler */
113 uint64_t mask; /* set unless handler returns 0 */
114 int taboo; /* node flags that must not be set */
115 };
116
117
118 int mandocdb(int, char *[]);
119
120 static void dbadd(struct dba *, struct mpage *);
121 static void dbadd_mlink(const struct mlink *mlink);
122 static void dbprune(struct dba *);
123 static void dbwrite(struct dba *);
124 static void filescan(const char *);
125 #if HAVE_FTS_COMPARE_CONST
126 static int fts_compare(const FTSENT *const *, const FTSENT *const *);
127 #else
128 static int fts_compare(const FTSENT **, const FTSENT **);
129 #endif
130 static void mlink_add(struct mlink *, const struct stat *);
131 static void mlink_check(struct mpage *, struct mlink *);
132 static void mlink_free(struct mlink *);
133 static void mlinks_undupe(struct mpage *);
134 static void mpages_free(void);
135 static void mpages_merge(struct dba *, struct mparse *);
136 static void parse_cat(struct mpage *, int);
137 static void parse_man(struct mpage *, const struct roff_meta *,
138 const struct roff_node *);
139 static void parse_mdoc(struct mpage *, const struct roff_meta *,
140 const struct roff_node *);
141 static int parse_mdoc_head(struct mpage *, const struct roff_meta *,
142 const struct roff_node *);
143 static int parse_mdoc_Fa(struct mpage *, const struct roff_meta *,
144 const struct roff_node *);
145 static int parse_mdoc_Fd(struct mpage *, const struct roff_meta *,
146 const struct roff_node *);
147 static void parse_mdoc_fname(struct mpage *, const struct roff_node *);
148 static int parse_mdoc_Fn(struct mpage *, const struct roff_meta *,
149 const struct roff_node *);
150 static int parse_mdoc_Fo(struct mpage *, const struct roff_meta *,
151 const struct roff_node *);
152 static int parse_mdoc_Nd(struct mpage *, const struct roff_meta *,
153 const struct roff_node *);
154 static int parse_mdoc_Nm(struct mpage *, const struct roff_meta *,
155 const struct roff_node *);
156 static int parse_mdoc_Sh(struct mpage *, const struct roff_meta *,
157 const struct roff_node *);
158 static int parse_mdoc_Va(struct mpage *, const struct roff_meta *,
159 const struct roff_node *);
160 static int parse_mdoc_Xr(struct mpage *, const struct roff_meta *,
161 const struct roff_node *);
162 static void putkey(const struct mpage *, char *, uint64_t);
163 static void putkeys(const struct mpage *, char *, size_t, uint64_t);
164 static void putmdockey(const struct mpage *,
165 const struct roff_node *, uint64_t, int);
166 static int render_string(char **, size_t *);
167 static void say(const char *, const char *, ...)
168 __attribute__((__format__ (__printf__, 2, 3)));
169 static int set_basedir(const char *, int);
170 static int treescan(void);
171 static size_t utf8(unsigned int, char [7]);
172
173 static int nodb; /* no database changes */
174 static int mparse_options; /* abort the parse early */
175 static int use_all; /* use all found files */
176 static int debug; /* print what we're doing */
177 static int warnings; /* warn about crap */
178 static int write_utf8; /* write UTF-8 output; else ASCII */
179 static int exitcode; /* to be returned by main */
180 static enum op op; /* operational mode */
181 static char basedir[PATH_MAX]; /* current base directory */
182 static struct mpage *mpage_head; /* list of distinct manual pages */
183 static struct ohash mpages; /* table of distinct manual pages */
184 static struct ohash mlinks; /* table of directory entries */
185 static struct ohash names; /* table of all names */
186 static struct ohash strings; /* table of all strings */
187 static uint64_t name_mask;
188
189 static const struct mdoc_handler mdoc_handlers[MDOC_MAX - MDOC_Dd] = {
190 { NULL, 0, NODE_NOPRT }, /* Dd */
191 { NULL, 0, NODE_NOPRT }, /* Dt */
192 { NULL, 0, NODE_NOPRT }, /* Os */
193 { parse_mdoc_Sh, TYPE_Sh, 0 }, /* Sh */
194 { parse_mdoc_head, TYPE_Ss, 0 }, /* Ss */
195 { NULL, 0, 0 }, /* Pp */
196 { NULL, 0, 0 }, /* D1 */
197 { NULL, 0, 0 }, /* Dl */
198 { NULL, 0, 0 }, /* Bd */
199 { NULL, 0, 0 }, /* Ed */
200 { NULL, 0, 0 }, /* Bl */
201 { NULL, 0, 0 }, /* El */
202 { NULL, 0, 0 }, /* It */
203 { NULL, 0, 0 }, /* Ad */
204 { NULL, TYPE_An, 0 }, /* An */
205 { NULL, 0, 0 }, /* Ap */
206 { NULL, TYPE_Ar, 0 }, /* Ar */
207 { NULL, TYPE_Cd, 0 }, /* Cd */
208 { NULL, TYPE_Cm, 0 }, /* Cm */
209 { NULL, TYPE_Dv, 0 }, /* Dv */
210 { NULL, TYPE_Er, 0 }, /* Er */
211 { NULL, TYPE_Ev, 0 }, /* Ev */
212 { NULL, 0, 0 }, /* Ex */
213 { parse_mdoc_Fa, 0, 0 }, /* Fa */
214 { parse_mdoc_Fd, 0, 0 }, /* Fd */
215 { NULL, TYPE_Fl, 0 }, /* Fl */
216 { parse_mdoc_Fn, 0, 0 }, /* Fn */
217 { NULL, TYPE_Ft | TYPE_Vt, 0 }, /* Ft */
218 { NULL, TYPE_Ic, 0 }, /* Ic */
219 { NULL, TYPE_In, 0 }, /* In */
220 { NULL, TYPE_Li, 0 }, /* Li */
221 { parse_mdoc_Nd, 0, 0 }, /* Nd */
222 { parse_mdoc_Nm, 0, 0 }, /* Nm */
223 { NULL, 0, 0 }, /* Op */
224 { NULL, 0, 0 }, /* Ot */
225 { NULL, TYPE_Pa, NODE_NOSRC }, /* Pa */
226 { NULL, 0, 0 }, /* Rv */
227 { NULL, TYPE_St, 0 }, /* St */
228 { parse_mdoc_Va, TYPE_Va, 0 }, /* Va */
229 { parse_mdoc_Va, TYPE_Vt, 0 }, /* Vt */
230 { parse_mdoc_Xr, 0, 0 }, /* Xr */
231 { NULL, 0, 0 }, /* %A */
232 { NULL, 0, 0 }, /* %B */
233 { NULL, 0, 0 }, /* %D */
234 { NULL, 0, 0 }, /* %I */
235 { NULL, 0, 0 }, /* %J */
236 { NULL, 0, 0 }, /* %N */
237 { NULL, 0, 0 }, /* %O */
238 { NULL, 0, 0 }, /* %P */
239 { NULL, 0, 0 }, /* %R */
240 { NULL, 0, 0 }, /* %T */
241 { NULL, 0, 0 }, /* %V */
242 { NULL, 0, 0 }, /* Ac */
243 { NULL, 0, 0 }, /* Ao */
244 { NULL, 0, 0 }, /* Aq */
245 { NULL, TYPE_At, 0 }, /* At */
246 { NULL, 0, 0 }, /* Bc */
247 { NULL, 0, 0 }, /* Bf */
248 { NULL, 0, 0 }, /* Bo */
249 { NULL, 0, 0 }, /* Bq */
250 { NULL, TYPE_Bsx, NODE_NOSRC }, /* Bsx */
251 { NULL, TYPE_Bx, NODE_NOSRC }, /* Bx */
252 { NULL, 0, 0 }, /* Db */
253 { NULL, 0, 0 }, /* Dc */
254 { NULL, 0, 0 }, /* Do */
255 { NULL, 0, 0 }, /* Dq */
256 { NULL, 0, 0 }, /* Ec */
257 { NULL, 0, 0 }, /* Ef */
258 { NULL, TYPE_Em, 0 }, /* Em */
259 { NULL, 0, 0 }, /* Eo */
260 { NULL, TYPE_Fx, NODE_NOSRC }, /* Fx */
261 { NULL, TYPE_Ms, 0 }, /* Ms */
262 { NULL, 0, 0 }, /* No */
263 { NULL, 0, 0 }, /* Ns */
264 { NULL, TYPE_Nx, NODE_NOSRC }, /* Nx */
265 { NULL, TYPE_Ox, NODE_NOSRC }, /* Ox */
266 { NULL, 0, 0 }, /* Pc */
267 { NULL, 0, 0 }, /* Pf */
268 { NULL, 0, 0 }, /* Po */
269 { NULL, 0, 0 }, /* Pq */
270 { NULL, 0, 0 }, /* Qc */
271 { NULL, 0, 0 }, /* Ql */
272 { NULL, 0, 0 }, /* Qo */
273 { NULL, 0, 0 }, /* Qq */
274 { NULL, 0, 0 }, /* Re */
275 { NULL, 0, 0 }, /* Rs */
276 { NULL, 0, 0 }, /* Sc */
277 { NULL, 0, 0 }, /* So */
278 { NULL, 0, 0 }, /* Sq */
279 { NULL, 0, 0 }, /* Sm */
280 { NULL, 0, 0 }, /* Sx */
281 { NULL, TYPE_Sy, 0 }, /* Sy */
282 { NULL, TYPE_Tn, 0 }, /* Tn */
283 { NULL, 0, NODE_NOSRC }, /* Ux */
284 { NULL, 0, 0 }, /* Xc */
285 { NULL, 0, 0 }, /* Xo */
286 { parse_mdoc_Fo, 0, 0 }, /* Fo */
287 { NULL, 0, 0 }, /* Fc */
288 { NULL, 0, 0 }, /* Oo */
289 { NULL, 0, 0 }, /* Oc */
290 { NULL, 0, 0 }, /* Bk */
291 { NULL, 0, 0 }, /* Ek */
292 { NULL, 0, 0 }, /* Bt */
293 { NULL, 0, 0 }, /* Hf */
294 { NULL, 0, 0 }, /* Fr */
295 { NULL, 0, 0 }, /* Ud */
296 { NULL, TYPE_Lb, NODE_NOSRC }, /* Lb */
297 { NULL, 0, 0 }, /* Lp */
298 { NULL, TYPE_Lk, 0 }, /* Lk */
299 { NULL, TYPE_Mt, NODE_NOSRC }, /* Mt */
300 { NULL, 0, 0 }, /* Brq */
301 { NULL, 0, 0 }, /* Bro */
302 { NULL, 0, 0 }, /* Brc */
303 { NULL, 0, 0 }, /* %C */
304 { NULL, 0, 0 }, /* Es */
305 { NULL, 0, 0 }, /* En */
306 { NULL, TYPE_Dx, NODE_NOSRC }, /* Dx */
307 { NULL, 0, 0 }, /* %Q */
308 { NULL, 0, 0 }, /* %U */
309 { NULL, 0, 0 }, /* Ta */
310 };
311
312
313 int
314 mandocdb(int argc, char *argv[])
315 {
316 struct manconf conf;
317 struct mparse *mp;
318 struct dba *dba;
319 const char *path_arg, *progname;
320 size_t j, sz;
321 int ch, i;
322
323 #if HAVE_PLEDGE
324 if (pledge("stdio rpath wpath cpath", NULL) == -1) {
325 warn("pledge");
326 return (int)MANDOCLEVEL_SYSERR;
327 }
328 #endif
329
330 #if HAVE_SANDBOX_INIT
331 if (sandbox_init(kSBXProfileNoInternet, SANDBOX_NAMED, NULL) == -1) {
332 warnx("sandbox_init");
333 return (int)MANDOCLEVEL_SYSERR;
334 }
335 #endif
336
337 memset(&conf, 0, sizeof(conf));
338
339 /*
340 * We accept a few different invocations.
341 * The CHECKOP macro makes sure that invocation styles don't
342 * clobber each other.
343 */
344 #define CHECKOP(_op, _ch) do \
345 if (OP_DEFAULT != (_op)) { \
346 warnx("-%c: Conflicting option", (_ch)); \
347 goto usage; \
348 } while (/*CONSTCOND*/0)
349
350 mparse_options = MPARSE_VALIDATE;
351 path_arg = NULL;
352 op = OP_DEFAULT;
353
354 while (-1 != (ch = getopt(argc, argv, "aC:Dd:npQT:tu:v")))
355 switch (ch) {
356 case 'a':
357 use_all = 1;
358 break;
359 case 'C':
360 CHECKOP(op, ch);
361 path_arg = optarg;
362 op = OP_CONFFILE;
363 break;
364 case 'D':
365 debug++;
366 break;
367 case 'd':
368 CHECKOP(op, ch);
369 path_arg = optarg;
370 op = OP_UPDATE;
371 break;
372 case 'n':
373 nodb = 1;
374 break;
375 case 'p':
376 warnings = 1;
377 break;
378 case 'Q':
379 mparse_options |= MPARSE_QUICK;
380 break;
381 case 'T':
382 if (strcmp(optarg, "utf8")) {
383 warnx("-T%s: Unsupported output format",
384 optarg);
385 goto usage;
386 }
387 write_utf8 = 1;
388 break;
389 case 't':
390 CHECKOP(op, ch);
391 dup2(STDOUT_FILENO, STDERR_FILENO);
392 op = OP_TEST;
393 nodb = warnings = 1;
394 break;
395 case 'u':
396 CHECKOP(op, ch);
397 path_arg = optarg;
398 op = OP_DELETE;
399 break;
400 case 'v':
401 /* Compatibility with espie@'s makewhatis. */
402 break;
403 default:
404 goto usage;
405 }
406
407 argc -= optind;
408 argv += optind;
409
410 #if HAVE_PLEDGE
411 if (nodb) {
412 if (pledge("stdio rpath", NULL) == -1) {
413 warn("pledge");
414 return (int)MANDOCLEVEL_SYSERR;
415 }
416 }
417 #endif
418
419 if (OP_CONFFILE == op && argc > 0) {
420 warnx("-C: Too many arguments");
421 goto usage;
422 }
423
424 exitcode = (int)MANDOCLEVEL_OK;
425 mchars_alloc();
426 mp = mparse_alloc(mparse_options, MANDOC_OS_OTHER, NULL);
427 mandoc_ohash_init(&mpages, 6, offsetof(struct mpage, inodev));
428 mandoc_ohash_init(&mlinks, 6, offsetof(struct mlink, file));
429
430 if (OP_UPDATE == op || OP_DELETE == op || OP_TEST == op) {
431
432 /*
433 * Most of these deal with a specific directory.
434 * Jump into that directory first.
435 */
436 if (OP_TEST != op && 0 == set_basedir(path_arg, 1))
437 goto out;
438
439 dba = nodb ? dba_new(128) : dba_read(MANDOC_DB);
440 if (dba != NULL) {
441 /*
442 * The existing database is usable. Process
443 * all files specified on the command-line.
444 */
445 use_all = 1;
446 for (i = 0; i < argc; i++)
447 filescan(argv[i]);
448 if (nodb == 0)
449 dbprune(dba);
450 } else {
451 /* Database missing or corrupt. */
452 if (op != OP_UPDATE || errno != ENOENT)
453 say(MANDOC_DB, "%s: Automatically recreating"
454 " from scratch", strerror(errno));
455 exitcode = (int)MANDOCLEVEL_OK;
456 op = OP_DEFAULT;
457 if (0 == treescan())
458 goto out;
459 dba = dba_new(128);
460 }
461 if (OP_DELETE != op)
462 mpages_merge(dba, mp);
463 if (nodb == 0)
464 dbwrite(dba);
465 dba_free(dba);
466 } else {
467 /*
468 * If we have arguments, use them as our manpaths.
469 * If we don't, use man.conf(5).
470 */
471 if (argc > 0) {
472 conf.manpath.paths = mandoc_reallocarray(NULL,
473 argc, sizeof(char *));
474 conf.manpath.sz = (size_t)argc;
475 for (i = 0; i < argc; i++)
476 conf.manpath.paths[i] = mandoc_strdup(argv[i]);
477 } else
478 manconf_parse(&conf, path_arg, NULL, NULL);
479
480 if (conf.manpath.sz == 0) {
481 exitcode = (int)MANDOCLEVEL_BADARG;
482 say("", "Empty manpath");
483 }
484
485 /*
486 * First scan the tree rooted at a base directory, then
487 * build a new database and finally move it into place.
488 * Ignore zero-length directories and strip trailing
489 * slashes.
490 */
491 for (j = 0; j < conf.manpath.sz; j++) {
492 sz = strlen(conf.manpath.paths[j]);
493 if (sz && conf.manpath.paths[j][sz - 1] == '/')
494 conf.manpath.paths[j][--sz] = '\0';
495 if (0 == sz)
496 continue;
497
498 if (j) {
499 mandoc_ohash_init(&mpages, 6,
500 offsetof(struct mpage, inodev));
501 mandoc_ohash_init(&mlinks, 6,
502 offsetof(struct mlink, file));
503 }
504
505 if ( ! set_basedir(conf.manpath.paths[j], argc > 0))
506 continue;
507 if (0 == treescan())
508 continue;
509 dba = dba_new(128);
510 mpages_merge(dba, mp);
511 if (nodb == 0)
512 dbwrite(dba);
513 dba_free(dba);
514
515 if (j + 1 < conf.manpath.sz) {
516 mpages_free();
517 ohash_delete(&mpages);
518 ohash_delete(&mlinks);
519 }
520 }
521 }
522 out:
523 manconf_free(&conf);
524 mparse_free(mp);
525 mchars_free();
526 mpages_free();
527 ohash_delete(&mpages);
528 ohash_delete(&mlinks);
529 return exitcode;
530 usage:
531 progname = getprogname();
532 fprintf(stderr, "usage: %s [-aDnpQ] [-C file] [-Tutf8]\n"
533 " %s [-aDnpQ] [-Tutf8] dir ...\n"
534 " %s [-DnpQ] [-Tutf8] -d dir [file ...]\n"
535 " %s [-Dnp] -u dir [file ...]\n"
536 " %s [-Q] -t file ...\n",
537 progname, progname, progname, progname, progname);
538
539 return (int)MANDOCLEVEL_BADARG;
540 }
541
542 /*
543 * To get a singly linked list in alpha order while inserting entries
544 * at the beginning, process directory entries in reverse alpha order.
545 */
546 static int
547 #if HAVE_FTS_COMPARE_CONST
548 fts_compare(const FTSENT *const *a, const FTSENT *const *b)
549 #else
550 fts_compare(const FTSENT **a, const FTSENT **b)
551 #endif
552 {
553 return -strcmp((*a)->fts_name, (*b)->fts_name);
554 }
555
556 /*
557 * Scan a directory tree rooted at "basedir" for manpages.
558 * We use fts(), scanning directory parts along the way for clues to our
559 * section and architecture.
560 *
561 * If use_all has been specified, grok all files.
562 * If not, sanitise paths to the following:
563 *
564 * [./]man*[/<arch>]/<name>.<section>
565 * or
566 * [./]cat<section>[/<arch>]/<name>.0
567 *
568 * TODO: accommodate for multi-language directories.
569 */
570 static int
571 treescan(void)
572 {
573 char buf[PATH_MAX];
574 FTS *f;
575 FTSENT *ff;
576 struct mlink *mlink;
577 int gzip;
578 enum form dform;
579 char *dsec, *arch, *fsec, *cp;
580 const char *path;
581 const char *argv[2];
582
583 argv[0] = ".";
584 argv[1] = NULL;
585
586 f = fts_open((char * const *)argv, FTS_PHYSICAL | FTS_NOCHDIR,
587 fts_compare);
588 if (f == NULL) {
589 exitcode = (int)MANDOCLEVEL_SYSERR;
590 say("", "&fts_open");
591 return 0;
592 }
593
594 dsec = arch = NULL;
595 dform = FORM_NONE;
596
597 while ((ff = fts_read(f)) != NULL) {
598 path = ff->fts_path + 2;
599 switch (ff->fts_info) {
600
601 /*
602 * Symbolic links require various sanity checks,
603 * then get handled just like regular files.
604 */
605 case FTS_SL:
606 if (realpath(path, buf) == NULL) {
607 if (warnings)
608 say(path, "&realpath");
609 continue;
610 }
611 if (strstr(buf, basedir) != buf
612 #ifdef HOMEBREWDIR
613 && strstr(buf, HOMEBREWDIR) != buf
614 #endif
615 ) {
616 if (warnings) say("",
617 "%s: outside base directory", buf);
618 continue;
619 }
620 /* Use logical inode to avoid mpages dupe. */
621 if (stat(path, ff->fts_statp) == -1) {
622 if (warnings)
623 say(path, "&stat");
624 continue;
625 }
626 /* FALLTHROUGH */
627
628 /*
629 * If we're a regular file, add an mlink by using the
630 * stored directory data and handling the filename.
631 */
632 case FTS_F:
633 if ( ! strcmp(path, MANDOC_DB))
634 continue;
635 if ( ! use_all && ff->fts_level < 2) {
636 if (warnings)
637 say(path, "Extraneous file");
638 continue;
639 }
640 gzip = 0;
641 fsec = NULL;
642 while (fsec == NULL) {
643 fsec = strrchr(ff->fts_name, '.');
644 if (fsec == NULL || strcmp(fsec+1, "gz"))
645 break;
646 gzip = 1;
647 *fsec = '\0';
648 fsec = NULL;
649 }
650 if (fsec == NULL) {
651 if ( ! use_all) {
652 if (warnings)
653 say(path,
654 "No filename suffix");
655 continue;
656 }
657 } else if ( ! strcmp(++fsec, "html")) {
658 if (warnings)
659 say(path, "Skip html");
660 continue;
661 } else if ( ! strcmp(fsec, "ps")) {
662 if (warnings)
663 say(path, "Skip ps");
664 continue;
665 } else if ( ! strcmp(fsec, "pdf")) {
666 if (warnings)
667 say(path, "Skip pdf");
668 continue;
669 } else if ( ! use_all &&
670 ((dform == FORM_SRC &&
671 strncmp(fsec, dsec, strlen(dsec))) ||
672 (dform == FORM_CAT && strcmp(fsec, "0")))) {
673 if (warnings)
674 say(path, "Wrong filename suffix");
675 continue;
676 } else
677 fsec[-1] = '\0';
678
679 mlink = mandoc_calloc(1, sizeof(struct mlink));
680 if (strlcpy(mlink->file, path,
681 sizeof(mlink->file)) >=
682 sizeof(mlink->file)) {
683 say(path, "Filename too long");
684 free(mlink);
685 continue;
686 }
687 mlink->dform = dform;
688 mlink->dsec = dsec;
689 mlink->arch = arch;
690 mlink->name = ff->fts_name;
691 mlink->fsec = fsec;
692 mlink->gzip = gzip;
693 mlink_add(mlink, ff->fts_statp);
694 continue;
695
696 case FTS_D:
697 case FTS_DP:
698 break;
699
700 default:
701 if (warnings)
702 say(path, "Not a regular file");
703 continue;
704 }
705
706 switch (ff->fts_level) {
707 case 0:
708 /* Ignore the root directory. */
709 break;
710 case 1:
711 /*
712 * This might contain manX/ or catX/.
713 * Try to infer this from the name.
714 * If we're not in use_all, enforce it.
715 */
716 cp = ff->fts_name;
717 if (ff->fts_info == FTS_DP) {
718 dform = FORM_NONE;
719 dsec = NULL;
720 break;
721 }
722
723 if ( ! strncmp(cp, "man", 3)) {
724 dform = FORM_SRC;
725 dsec = cp + 3;
726 } else if ( ! strncmp(cp, "cat", 3)) {
727 dform = FORM_CAT;
728 dsec = cp + 3;
729 } else {
730 dform = FORM_NONE;
731 dsec = NULL;
732 }
733
734 if (dsec != NULL || use_all)
735 break;
736
737 if (warnings)
738 say(path, "Unknown directory part");
739 fts_set(f, ff, FTS_SKIP);
740 break;
741 case 2:
742 /*
743 * Possibly our architecture.
744 * If we're descending, keep tabs on it.
745 */
746 if (ff->fts_info != FTS_DP && dsec != NULL)
747 arch = ff->fts_name;
748 else
749 arch = NULL;
750 break;
751 default:
752 if (ff->fts_info == FTS_DP || use_all)
753 break;
754 if (warnings)
755 say(path, "Extraneous directory part");
756 fts_set(f, ff, FTS_SKIP);
757 break;
758 }
759 }
760
761 fts_close(f);
762 return 1;
763 }
764
765 /*
766 * Add a file to the mlinks table.
767 * Do not verify that it's a "valid" looking manpage (we'll do that
768 * later).
769 *
770 * Try to infer the manual section, architecture, and page name from the
771 * path, assuming it looks like
772 *
773 * [./]man*[/<arch>]/<name>.<section>
774 * or
775 * [./]cat<section>[/<arch>]/<name>.0
776 *
777 * See treescan() for the fts(3) version of this.
778 */
779 static void
780 filescan(const char *file)
781 {
782 char buf[PATH_MAX];
783 struct stat st;
784 struct mlink *mlink;
785 char *p, *start;
786
787 assert(use_all);
788
789 if (0 == strncmp(file, "./", 2))
790 file += 2;
791
792 /*
793 * We have to do lstat(2) before realpath(3) loses
794 * the information whether this is a symbolic link.
795 * We need to know that because for symbolic links,
796 * we want to use the orginal file name, while for
797 * regular files, we want to use the real path.
798 */
799 if (-1 == lstat(file, &st)) {
800 exitcode = (int)MANDOCLEVEL_BADARG;
801 say(file, "&lstat");
802 return;
803 } else if (0 == ((S_IFREG | S_IFLNK) & st.st_mode)) {
804 exitcode = (int)MANDOCLEVEL_BADARG;
805 say(file, "Not a regular file");
806 return;
807 }
808
809 /*
810 * We have to resolve the file name to the real path
811 * in any case for the base directory check.
812 */
813 if (NULL == realpath(file, buf)) {
814 exitcode = (int)MANDOCLEVEL_BADARG;
815 say(file, "&realpath");
816 return;
817 }
818
819 if (OP_TEST == op)
820 start = buf;
821 else if (strstr(buf, basedir) == buf)
822 start = buf + strlen(basedir);
823 #ifdef HOMEBREWDIR
824 else if (strstr(buf, HOMEBREWDIR) == buf)
825 start = buf;
826 #endif
827 else {
828 exitcode = (int)MANDOCLEVEL_BADARG;
829 say("", "%s: outside base directory", buf);
830 return;
831 }
832
833 /*
834 * Now we are sure the file is inside our tree.
835 * If it is a symbolic link, ignore the real path
836 * and use the original name.
837 * This implies passing stuff like "cat1/../man1/foo.1"
838 * on the command line won't work. So don't do that.
839 * Note the stat(2) can still fail if the link target
840 * doesn't exist.
841 */
842 if (S_IFLNK & st.st_mode) {
843 if (-1 == stat(buf, &st)) {
844 exitcode = (int)MANDOCLEVEL_BADARG;
845 say(file, "&stat");
846 return;
847 }
848 if (strlcpy(buf, file, sizeof(buf)) >= sizeof(buf)) {
849 say(file, "Filename too long");
850 return;
851 }
852 start = buf;
853 if (OP_TEST != op && strstr(buf, basedir) == buf)
854 start += strlen(basedir);
855 }
856
857 mlink = mandoc_calloc(1, sizeof(struct mlink));
858 mlink->dform = FORM_NONE;
859 if (strlcpy(mlink->file, start, sizeof(mlink->file)) >=
860 sizeof(mlink->file)) {
861 say(start, "Filename too long");
862 free(mlink);
863 return;
864 }
865
866 /*
867 * In test mode or when the original name is absolute
868 * but outside our tree, guess the base directory.
869 */
870
871 if (op == OP_TEST || (start == buf && *start == '/')) {
872 if (strncmp(buf, "man/", 4) == 0)
873 start = buf + 4;
874 else if ((start = strstr(buf, "/man/")) != NULL)
875 start += 5;
876 else
877 start = buf;
878 }
879
880 /*
881 * First try to guess our directory structure.
882 * If we find a separator, try to look for man* or cat*.
883 * If we find one of these and what's underneath is a directory,
884 * assume it's an architecture.
885 */
886 if (NULL != (p = strchr(start, '/'))) {
887 *p++ = '\0';
888 if (0 == strncmp(start, "man", 3)) {
889 mlink->dform = FORM_SRC;
890 mlink->dsec = start + 3;
891 } else if (0 == strncmp(start, "cat", 3)) {
892 mlink->dform = FORM_CAT;
893 mlink->dsec = start + 3;
894 }
895
896 start = p;
897 if (NULL != mlink->dsec && NULL != (p = strchr(start, '/'))) {
898 *p++ = '\0';
899 mlink->arch = start;
900 start = p;
901 }
902 }
903
904 /*
905 * Now check the file suffix.
906 * Suffix of `.0' indicates a catpage, `.1-9' is a manpage.
907 */
908 p = strrchr(start, '\0');
909 while (p-- > start && '/' != *p && '.' != *p)
910 /* Loop. */ ;
911
912 if ('.' == *p) {
913 *p++ = '\0';
914 mlink->fsec = p;
915 }
916
917 /*
918 * Now try to parse the name.
919 * Use the filename portion of the path.
920 */
921 mlink->name = start;
922 if (NULL != (p = strrchr(start, '/'))) {
923 mlink->name = p + 1;
924 *p = '\0';
925 }
926 mlink_add(mlink, &st);
927 }
928
929 static void
930 mlink_add(struct mlink *mlink, const struct stat *st)
931 {
932 struct inodev inodev;
933 struct mpage *mpage;
934 unsigned int slot;
935
936 assert(NULL != mlink->file);
937
938 mlink->dsec = mandoc_strdup(mlink->dsec ? mlink->dsec : "");
939 mlink->arch = mandoc_strdup(mlink->arch ? mlink->arch : "");
940 mlink->name = mandoc_strdup(mlink->name ? mlink->name : "");
941 mlink->fsec = mandoc_strdup(mlink->fsec ? mlink->fsec : "");
942
943 if ('0' == *mlink->fsec) {
944 free(mlink->fsec);
945 mlink->fsec = mandoc_strdup(mlink->dsec);
946 mlink->fform = FORM_CAT;
947 } else if ('1' <= *mlink->fsec && '9' >= *mlink->fsec)
948 mlink->fform = FORM_SRC;
949 else
950 mlink->fform = FORM_NONE;
951
952 slot = ohash_qlookup(&mlinks, mlink->file);
953 assert(NULL == ohash_find(&mlinks, slot));
954 ohash_insert(&mlinks, slot, mlink);
955
956 memset(&inodev, 0, sizeof(inodev)); /* Clear padding. */
957 inodev.st_ino = st->st_ino;
958 inodev.st_dev = st->st_dev;
959 slot = ohash_lookup_memory(&mpages, (char *)&inodev,
960 sizeof(struct inodev), inodev.st_ino);
961 mpage = ohash_find(&mpages, slot);
962 if (NULL == mpage) {
963 mpage = mandoc_calloc(1, sizeof(struct mpage));
964 mpage->inodev.st_ino = inodev.st_ino;
965 mpage->inodev.st_dev = inodev.st_dev;
966 mpage->form = FORM_NONE;
967 mpage->next = mpage_head;
968 mpage_head = mpage;
969 ohash_insert(&mpages, slot, mpage);
970 } else
971 mlink->next = mpage->mlinks;
972 mpage->mlinks = mlink;
973 mlink->mpage = mpage;
974 }
975
976 static void
977 mlink_free(struct mlink *mlink)
978 {
979
980 free(mlink->dsec);
981 free(mlink->arch);
982 free(mlink->name);
983 free(mlink->fsec);
984 free(mlink);
985 }
986
987 static void
988 mpages_free(void)
989 {
990 struct mpage *mpage;
991 struct mlink *mlink;
992
993 while ((mpage = mpage_head) != NULL) {
994 while ((mlink = mpage->mlinks) != NULL) {
995 mpage->mlinks = mlink->next;
996 mlink_free(mlink);
997 }
998 mpage_head = mpage->next;
999 free(mpage->sec);
1000 free(mpage->arch);
1001 free(mpage->title);
1002 free(mpage->desc);
1003 free(mpage);
1004 }
1005 }
1006
1007 /*
1008 * For each mlink to the mpage, check whether the path looks like
1009 * it is formatted, and if it does, check whether a source manual
1010 * exists by the same name, ignoring the suffix.
1011 * If both conditions hold, drop the mlink.
1012 */
1013 static void
1014 mlinks_undupe(struct mpage *mpage)
1015 {
1016 char buf[PATH_MAX];
1017 struct mlink **prev;
1018 struct mlink *mlink;
1019 char *bufp;
1020
1021 mpage->form = FORM_CAT;
1022 prev = &mpage->mlinks;
1023 while (NULL != (mlink = *prev)) {
1024 if (FORM_CAT != mlink->dform) {
1025 mpage->form = FORM_NONE;
1026 goto nextlink;
1027 }
1028 (void)strlcpy(buf, mlink->file, sizeof(buf));
1029 bufp = strstr(buf, "cat");
1030 assert(NULL != bufp);
1031 memcpy(bufp, "man", 3);
1032 if (NULL != (bufp = strrchr(buf, '.')))
1033 *++bufp = '\0';
1034 (void)strlcat(buf, mlink->dsec, sizeof(buf));
1035 if (NULL == ohash_find(&mlinks,
1036 ohash_qlookup(&mlinks, buf)))
1037 goto nextlink;
1038 if (warnings)
1039 say(mlink->file, "Man source exists: %s", buf);
1040 if (use_all)
1041 goto nextlink;
1042 *prev = mlink->next;
1043 mlink_free(mlink);
1044 continue;
1045 nextlink:
1046 prev = &(*prev)->next;
1047 }
1048 }
1049
1050 static void
1051 mlink_check(struct mpage *mpage, struct mlink *mlink)
1052 {
1053 struct str *str;
1054 unsigned int slot;
1055
1056 /*
1057 * Check whether the manual section given in a file
1058 * agrees with the directory where the file is located.
1059 * Some manuals have suffixes like (3p) on their
1060 * section number either inside the file or in the
1061 * directory name, some are linked into more than one
1062 * section, like encrypt(1) = makekey(8).
1063 */
1064
1065 if (FORM_SRC == mpage->form &&
1066 strcasecmp(mpage->sec, mlink->dsec))
1067 say(mlink->file, "Section \"%s\" manual in %s directory",
1068 mpage->sec, mlink->dsec);
1069
1070 /*
1071 * Manual page directories exist for each kernel
1072 * architecture as returned by machine(1).
1073 * However, many manuals only depend on the
1074 * application architecture as returned by arch(1).
1075 * For example, some (2/ARM) manuals are shared
1076 * across the "armish" and "zaurus" kernel
1077 * architectures.
1078 * A few manuals are even shared across completely
1079 * different architectures, for example fdformat(1)
1080 * on amd64, i386, and sparc64.
1081 */
1082
1083 if (strcasecmp(mpage->arch, mlink->arch))
1084 say(mlink->file, "Architecture \"%s\" manual in "
1085 "\"%s\" directory", mpage->arch, mlink->arch);
1086
1087 /*
1088 * XXX
1089 * parse_cat() doesn't set NAME_TITLE yet.
1090 */
1091
1092 if (FORM_CAT == mpage->form)
1093 return;
1094
1095 /*
1096 * Check whether this mlink
1097 * appears as a name in the NAME section.
1098 */
1099
1100 slot = ohash_qlookup(&names, mlink->name);
1101 str = ohash_find(&names, slot);
1102 assert(NULL != str);
1103 if ( ! (NAME_TITLE & str->mask))
1104 say(mlink->file, "Name missing in NAME section");
1105 }
1106
1107 /*
1108 * Run through the files in the global vector "mpages"
1109 * and add them to the database specified in "basedir".
1110 *
1111 * This handles the parsing scheme itself, using the cues of directory
1112 * and filename to determine whether the file is parsable or not.
1113 */
1114 static void
1115 mpages_merge(struct dba *dba, struct mparse *mp)
1116 {
1117 struct mpage *mpage, *mpage_dest;
1118 struct mlink *mlink, *mlink_dest;
1119 struct roff_meta *meta;
1120 char *cp;
1121 int fd;
1122
1123 for (mpage = mpage_head; mpage != NULL; mpage = mpage->next) {
1124 mlinks_undupe(mpage);
1125 if ((mlink = mpage->mlinks) == NULL)
1126 continue;
1127
1128 name_mask = NAME_MASK;
1129 mandoc_ohash_init(&names, 4, offsetof(struct str, key));
1130 mandoc_ohash_init(&strings, 6, offsetof(struct str, key));
1131 mparse_reset(mp);
1132 meta = NULL;
1133
1134 if ((fd = mparse_open(mp, mlink->file)) == -1) {
1135 say(mlink->file, "&open");
1136 goto nextpage;
1137 }
1138
1139 /*
1140 * Interpret the file as mdoc(7) or man(7) source
1141 * code, unless it is known to be formatted.
1142 */
1143 if (mlink->dform != FORM_CAT || mlink->fform != FORM_CAT) {
1144 mparse_readfd(mp, fd, mlink->file);
1145 close(fd);
1146 fd = -1;
1147 meta = mparse_result(mp);
1148 }
1149
1150 if (meta != NULL && meta->sodest != NULL) {
1151 mlink_dest = ohash_find(&mlinks,
1152 ohash_qlookup(&mlinks, meta->sodest));
1153 if (mlink_dest == NULL) {
1154 mandoc_asprintf(&cp, "%s.gz", meta->sodest);
1155 mlink_dest = ohash_find(&mlinks,
1156 ohash_qlookup(&mlinks, cp));
1157 free(cp);
1158 }
1159 if (mlink_dest != NULL) {
1160
1161 /* The .so target exists. */
1162
1163 mpage_dest = mlink_dest->mpage;
1164 while (1) {
1165 mlink->mpage = mpage_dest;
1166
1167 /*
1168 * If the target was already
1169 * processed, add the links
1170 * to the database now.
1171 * Otherwise, this will
1172 * happen when we come
1173 * to the target.
1174 */
1175
1176 if (mpage_dest->dba != NULL)
1177 dbadd_mlink(mlink);
1178
1179 if (mlink->next == NULL)
1180 break;
1181 mlink = mlink->next;
1182 }
1183
1184 /* Move all links to the target. */
1185
1186 mlink->next = mlink_dest->next;
1187 mlink_dest->next = mpage->mlinks;
1188 mpage->mlinks = NULL;
1189 }
1190 goto nextpage;
1191 } else if (meta != NULL && meta->macroset == MACROSET_MDOC) {
1192 mpage->form = FORM_SRC;
1193 mpage->sec = meta->msec;
1194 mpage->sec = mandoc_strdup(
1195 mpage->sec == NULL ? "" : mpage->sec);
1196 mpage->arch = meta->arch;
1197 mpage->arch = mandoc_strdup(
1198 mpage->arch == NULL ? "" : mpage->arch);
1199 mpage->title = mandoc_strdup(meta->title);
1200 } else if (meta != NULL && meta->macroset == MACROSET_MAN) {
1201 if (*meta->msec != '\0' || *meta->title != '\0') {
1202 mpage->form = FORM_SRC;
1203 mpage->sec = mandoc_strdup(meta->msec);
1204 mpage->arch = mandoc_strdup(mlink->arch);
1205 mpage->title = mandoc_strdup(meta->title);
1206 } else
1207 meta = NULL;
1208 }
1209
1210 assert(mpage->desc == NULL);
1211 if (meta == NULL) {
1212 mpage->form = FORM_CAT;
1213 mpage->sec = mandoc_strdup(mlink->dsec);
1214 mpage->arch = mandoc_strdup(mlink->arch);
1215 mpage->title = mandoc_strdup(mlink->name);
1216 parse_cat(mpage, fd);
1217 } else if (meta->macroset == MACROSET_MDOC)
1218 parse_mdoc(mpage, meta, meta->first);
1219 else
1220 parse_man(mpage, meta, meta->first);
1221 if (mpage->desc == NULL) {
1222 mpage->desc = mandoc_strdup(mlink->name);
1223 if (warnings)
1224 say(mlink->file, "No one-line description, "
1225 "using filename \"%s\"", mlink->name);
1226 }
1227
1228 for (mlink = mpage->mlinks;
1229 mlink != NULL;
1230 mlink = mlink->next) {
1231 putkey(mpage, mlink->name, NAME_FILE);
1232 if (warnings && !use_all)
1233 mlink_check(mpage, mlink);
1234 }
1235
1236 dbadd(dba, mpage);
1237
1238 nextpage:
1239 ohash_delete(&strings);
1240 ohash_delete(&names);
1241 }
1242 }
1243
1244 static void
1245 parse_cat(struct mpage *mpage, int fd)
1246 {
1247 FILE *stream;
1248 struct mlink *mlink;
1249 char *line, *p, *title, *sec;
1250 size_t linesz, plen, titlesz;
1251 ssize_t len;
1252 int offs;
1253
1254 mlink = mpage->mlinks;
1255 stream = fd == -1 ? fopen(mlink->file, "r") : fdopen(fd, "r");
1256 if (stream == NULL) {
1257 if (fd != -1)
1258 close(fd);
1259 if (warnings)
1260 say(mlink->file, "&fopen");
1261 return;
1262 }
1263
1264 line = NULL;
1265 linesz = 0;
1266
1267 /* Parse the section number from the header line. */
1268
1269 while (getline(&line, &linesz, stream) != -1) {
1270 if (*line == '\n')
1271 continue;
1272 if ((sec = strchr(line, '(')) == NULL)
1273 break;
1274 if ((p = strchr(++sec, ')')) == NULL)
1275 break;
1276 free(mpage->sec);
1277 mpage->sec = mandoc_strndup(sec, p - sec);
1278 if (warnings && *mlink->dsec != '\0' &&
1279 strcasecmp(mpage->sec, mlink->dsec))
1280 say(mlink->file,
1281 "Section \"%s\" manual in %s directory",
1282 mpage->sec, mlink->dsec);
1283 break;
1284 }
1285
1286 /* Skip to first blank line. */
1287
1288 while (line == NULL || *line != '\n')
1289 if (getline(&line, &linesz, stream) == -1)
1290 break;
1291
1292 /*
1293 * Assume the first line that is not indented
1294 * is the first section header. Skip to it.
1295 */
1296
1297 while (getline(&line, &linesz, stream) != -1)
1298 if (*line != '\n' && *line != ' ')
1299 break;
1300
1301 /*
1302 * Read up until the next section into a buffer.
1303 * Strip the leading and trailing newline from each read line,
1304 * appending a trailing space.
1305 * Ignore empty (whitespace-only) lines.
1306 */
1307
1308 titlesz = 0;
1309 title = NULL;
1310
1311 while ((len = getline(&line, &linesz, stream)) != -1) {
1312 if (*line != ' ')
1313 break;
1314 offs = 0;
1315 while (isspace((unsigned char)line[offs]))
1316 offs++;
1317 if (line[offs] == '\0')
1318 continue;
1319 title = mandoc_realloc(title, titlesz + len - offs);
1320 memcpy(title + titlesz, line + offs, len - offs);
1321 titlesz += len - offs;
1322 title[titlesz - 1] = ' ';
1323 }
1324 free(line);
1325
1326 /*
1327 * If no page content can be found, or the input line
1328 * is already the next section header, or there is no
1329 * trailing newline, reuse the page title as the page
1330 * description.
1331 */
1332
1333 if (NULL == title || '\0' == *title) {
1334 if (warnings)
1335 say(mlink->file, "Cannot find NAME section");
1336 fclose(stream);
1337 free(title);
1338 return;
1339 }
1340
1341 title[titlesz - 1] = '\0';
1342
1343 /*
1344 * Skip to the first dash.
1345 * Use the remaining line as the description (no more than 70
1346 * bytes).
1347 */
1348
1349 if (NULL != (p = strstr(title, "- "))) {
1350 for (p += 2; ' ' == *p || '\b' == *p; p++)
1351 /* Skip to next word. */ ;
1352 } else {
1353 if (warnings)
1354 say(mlink->file, "No dash in title line, "
1355 "reusing \"%s\" as one-line description", title);
1356 p = title;
1357 }
1358
1359 plen = strlen(p);
1360
1361 /* Strip backspace-encoding from line. */
1362
1363 while (NULL != (line = memchr(p, '\b', plen))) {
1364 len = line - p;
1365 if (0 == len) {
1366 memmove(line, line + 1, plen--);
1367 continue;
1368 }
1369 memmove(line - 1, line + 1, plen - len);
1370 plen -= 2;
1371 }
1372
1373 /*
1374 * Cut off excessive one-line descriptions.
1375 * Bad pages are not worth better heuristics.
1376 */
1377
1378 mpage->desc = mandoc_strndup(p, 150);
1379 fclose(stream);
1380 free(title);
1381 }
1382
1383 /*
1384 * Put a type/word pair into the word database for this particular file.
1385 */
1386 static void
1387 putkey(const struct mpage *mpage, char *value, uint64_t type)
1388 {
1389 putkeys(mpage, value, strlen(value), type);
1390 }
1391
1392 /*
1393 * Grok all nodes at or below a certain mdoc node into putkey().
1394 */
1395 static void
1396 putmdockey(const struct mpage *mpage,
1397 const struct roff_node *n, uint64_t m, int taboo)
1398 {
1399
1400 for ( ; NULL != n; n = n->next) {
1401 if (n->flags & taboo)
1402 continue;
1403 if (NULL != n->child)
1404 putmdockey(mpage, n->child, m, taboo);
1405 if (n->type == ROFFT_TEXT)
1406 putkey(mpage, n->string, m);
1407 }
1408 }
1409
1410 static void
1411 parse_man(struct mpage *mpage, const struct roff_meta *meta,
1412 const struct roff_node *n)
1413 {
1414 const struct roff_node *head, *body;
1415 char *start, *title;
1416 char byte;
1417 size_t sz;
1418
1419 if (n == NULL)
1420 return;
1421
1422 /*
1423 * We're only searching for one thing: the first text child in
1424 * the BODY of a NAME section. Since we don't keep track of
1425 * sections in -man, run some hoops to find out whether we're in
1426 * the correct section or not.
1427 */
1428
1429 if (n->type == ROFFT_BODY && n->tok == MAN_SH) {
1430 body = n;
1431 if ((head = body->parent->head) != NULL &&
1432 (head = head->child) != NULL &&
1433 head->next == NULL &&
1434 head->type == ROFFT_TEXT &&
1435 strcmp(head->string, "NAME") == 0 &&
1436 body->child != NULL) {
1437
1438 /*
1439 * Suck the entire NAME section into memory.
1440 * Yes, we might run away.
1441 * But too many manuals have big, spread-out
1442 * NAME sections over many lines.
1443 */
1444
1445 title = NULL;
1446 deroff(&title, body);
1447 if (NULL == title)
1448 return;
1449
1450 /*
1451 * Go through a special heuristic dance here.
1452 * Conventionally, one or more manual names are
1453 * comma-specified prior to a whitespace, then a
1454 * dash, then a description. Try to puzzle out
1455 * the name parts here.
1456 */
1457
1458 start = title;
1459 for ( ;; ) {
1460 sz = strcspn(start, " ,");
1461 if ('\0' == start[sz])
1462 break;
1463
1464 byte = start[sz];
1465 start[sz] = '\0';
1466
1467 /*
1468 * Assume a stray trailing comma in the
1469 * name list if a name begins with a dash.
1470 */
1471
1472 if ('-' == start[0] ||
1473 ('\\' == start[0] && '-' == start[1]))
1474 break;
1475
1476 putkey(mpage, start, NAME_TITLE);
1477 if ( ! (mpage->name_head_done ||
1478 strcasecmp(start, meta->title))) {
1479 putkey(mpage, start, NAME_HEAD);
1480 mpage->name_head_done = 1;
1481 }
1482
1483 if (' ' == byte) {
1484 start += sz + 1;
1485 break;
1486 }
1487
1488 assert(',' == byte);
1489 start += sz + 1;
1490 while (' ' == *start)
1491 start++;
1492 }
1493
1494 if (start == title) {
1495 putkey(mpage, start, NAME_TITLE);
1496 if ( ! (mpage->name_head_done ||
1497 strcasecmp(start, meta->title))) {
1498 putkey(mpage, start, NAME_HEAD);
1499 mpage->name_head_done = 1;
1500 }
1501 free(title);
1502 return;
1503 }
1504
1505 while (isspace((unsigned char)*start))
1506 start++;
1507
1508 if (0 == strncmp(start, "-", 1))
1509 start += 1;
1510 else if (0 == strncmp(start, "\\-\\-", 4))
1511 start += 4;
1512 else if (0 == strncmp(start, "\\-", 2))
1513 start += 2;
1514 else if (0 == strncmp(start, "\\(en", 4))
1515 start += 4;
1516 else if (0 == strncmp(start, "\\(em", 4))
1517 start += 4;
1518
1519 while (' ' == *start)
1520 start++;
1521
1522 /*
1523 * Cut off excessive one-line descriptions.
1524 * Bad pages are not worth better heuristics.
1525 */
1526
1527 mpage->desc = mandoc_strndup(start, 150);
1528 free(title);
1529 return;
1530 }
1531 }
1532
1533 for (n = n->child; n; n = n->next) {
1534 if (NULL != mpage->desc)
1535 break;
1536 parse_man(mpage, meta, n);
1537 }
1538 }
1539
1540 static void
1541 parse_mdoc(struct mpage *mpage, const struct roff_meta *meta,
1542 const struct roff_node *n)
1543 {
1544 const struct mdoc_handler *handler;
1545
1546 for (n = n->child; n != NULL; n = n->next) {
1547 if (n->tok == TOKEN_NONE || n->tok < ROFF_MAX)
1548 continue;
1549 assert(n->tok >= MDOC_Dd && n->tok < MDOC_MAX);
1550 handler = mdoc_handlers + (n->tok - MDOC_Dd);
1551 if (n->flags & handler->taboo)
1552 continue;
1553
1554 switch (n->type) {
1555 case ROFFT_ELEM:
1556 case ROFFT_BLOCK:
1557 case ROFFT_HEAD:
1558 case ROFFT_BODY:
1559 case ROFFT_TAIL:
1560 if (handler->fp != NULL &&
1561 (*handler->fp)(mpage, meta, n) == 0)
1562 break;
1563 if (handler->mask)
1564 putmdockey(mpage, n->child,
1565 handler->mask, handler->taboo);
1566 break;
1567 default:
1568 continue;
1569 }
1570 if (NULL != n->child)
1571 parse_mdoc(mpage, meta, n);
1572 }
1573 }
1574
1575 static int
1576 parse_mdoc_Fa(struct mpage *mpage, const struct roff_meta *meta,
1577 const struct roff_node *n)
1578 {
1579 uint64_t mask;
1580
1581 mask = TYPE_Fa;
1582 if (n->sec == SEC_SYNOPSIS)
1583 mask |= TYPE_Vt;
1584
1585 putmdockey(mpage, n->child, mask, 0);
1586 return 0;
1587 }
1588
1589 static int
1590 parse_mdoc_Fd(struct mpage *mpage, const struct roff_meta *meta,
1591 const struct roff_node *n)
1592 {
1593 char *start, *end;
1594 size_t sz;
1595
1596 if (SEC_SYNOPSIS != n->sec ||
1597 NULL == (n = n->child) ||
1598 n->type != ROFFT_TEXT)
1599 return 0;
1600
1601 /*
1602 * Only consider those `Fd' macro fields that begin with an
1603 * "inclusion" token (versus, e.g., #define).
1604 */
1605
1606 if (strcmp("#include", n->string))
1607 return 0;
1608
1609 if ((n = n->next) == NULL || n->type != ROFFT_TEXT)
1610 return 0;
1611
1612 /*
1613 * Strip away the enclosing angle brackets and make sure we're
1614 * not zero-length.
1615 */
1616
1617 start = n->string;
1618 if ('<' == *start || '"' == *start)
1619 start++;
1620
1621 if (0 == (sz = strlen(start)))
1622 return 0;
1623
1624 end = &start[(int)sz - 1];
1625 if ('>' == *end || '"' == *end)
1626 end--;
1627
1628 if (end > start)
1629 putkeys(mpage, start, end - start + 1, TYPE_In);
1630 return 0;
1631 }
1632
1633 static void
1634 parse_mdoc_fname(struct mpage *mpage, const struct roff_node *n)
1635 {
1636 char *cp;
1637 size_t sz;
1638
1639 if (n->type != ROFFT_TEXT)
1640 return;
1641
1642 /* Skip function pointer punctuation. */
1643
1644 cp = n->string;
1645 while (*cp == '(' || *cp == '*')
1646 cp++;
1647 sz = strcspn(cp, "()");
1648
1649 putkeys(mpage, cp, sz, TYPE_Fn);
1650 if (n->sec == SEC_SYNOPSIS)
1651 putkeys(mpage, cp, sz, NAME_SYN);
1652 }
1653
1654 static int
1655 parse_mdoc_Fn(struct mpage *mpage, const struct roff_meta *meta,
1656 const struct roff_node *n)
1657 {
1658 uint64_t mask;
1659
1660 if (n->child == NULL)
1661 return 0;
1662
1663 parse_mdoc_fname(mpage, n->child);
1664
1665 n = n->child->next;
1666 if (n != NULL && n->type == ROFFT_TEXT) {
1667 mask = TYPE_Fa;
1668 if (n->sec == SEC_SYNOPSIS)
1669 mask |= TYPE_Vt;
1670 putmdockey(mpage, n, mask, 0);
1671 }
1672
1673 return 0;
1674 }
1675
1676 static int
1677 parse_mdoc_Fo(struct mpage *mpage, const struct roff_meta *meta,
1678 const struct roff_node *n)
1679 {
1680
1681 if (n->type != ROFFT_HEAD)
1682 return 1;
1683
1684 if (n->child != NULL)
1685 parse_mdoc_fname(mpage, n->child);
1686
1687 return 0;
1688 }
1689
1690 static int
1691 parse_mdoc_Va(struct mpage *mpage, const struct roff_meta *meta,
1692 const struct roff_node *n)
1693 {
1694 char *cp;
1695
1696 if (n->type != ROFFT_ELEM && n->type != ROFFT_BODY)
1697 return 0;
1698
1699 if (n->child != NULL &&
1700 n->child->next == NULL &&
1701 n->child->type == ROFFT_TEXT)
1702 return 1;
1703
1704 cp = NULL;
1705 deroff(&cp, n);
1706 if (cp != NULL) {
1707 putkey(mpage, cp, TYPE_Vt | (n->tok == MDOC_Va ||
1708 n->type == ROFFT_BODY ? TYPE_Va : 0));
1709 free(cp);
1710 }
1711
1712 return 0;
1713 }
1714
1715 static int
1716 parse_mdoc_Xr(struct mpage *mpage, const struct roff_meta *meta,
1717 const struct roff_node *n)
1718 {
1719 char *cp;
1720
1721 if (NULL == (n = n->child))
1722 return 0;
1723
1724 if (NULL == n->next) {
1725 putkey(mpage, n->string, TYPE_Xr);
1726 return 0;
1727 }
1728
1729 mandoc_asprintf(&cp, "%s(%s)", n->string, n->next->string);
1730 putkey(mpage, cp, TYPE_Xr);
1731 free(cp);
1732 return 0;
1733 }
1734
1735 static int
1736 parse_mdoc_Nd(struct mpage *mpage, const struct roff_meta *meta,
1737 const struct roff_node *n)
1738 {
1739
1740 if (n->type == ROFFT_BODY)
1741 deroff(&mpage->desc, n);
1742 return 0;
1743 }
1744
1745 static int
1746 parse_mdoc_Nm(struct mpage *mpage, const struct roff_meta *meta,
1747 const struct roff_node *n)
1748 {
1749
1750 if (SEC_NAME == n->sec)
1751 putmdockey(mpage, n->child, NAME_TITLE, 0);
1752 else if (n->sec == SEC_SYNOPSIS && n->type == ROFFT_HEAD) {
1753 if (n->child == NULL)
1754 putkey(mpage, meta->name, NAME_SYN);
1755 else
1756 putmdockey(mpage, n->child, NAME_SYN, 0);
1757 }
1758 if ( ! (mpage->name_head_done ||
1759 n->child == NULL || n->child->string == NULL ||
1760 strcasecmp(n->child->string, meta->title))) {
1761 putkey(mpage, n->child->string, NAME_HEAD);
1762 mpage->name_head_done = 1;
1763 }
1764 return 0;
1765 }
1766
1767 static int
1768 parse_mdoc_Sh(struct mpage *mpage, const struct roff_meta *meta,
1769 const struct roff_node *n)
1770 {
1771
1772 return n->sec == SEC_CUSTOM && n->type == ROFFT_HEAD;
1773 }
1774
1775 static int
1776 parse_mdoc_head(struct mpage *mpage, const struct roff_meta *meta,
1777 const struct roff_node *n)
1778 {
1779
1780 return n->type == ROFFT_HEAD;
1781 }
1782
1783 /*
1784 * Add a string to the hash table for the current manual.
1785 * Each string has a bitmask telling which macros it belongs to.
1786 * When we finish the manual, we'll dump the table.
1787 */
1788 static void
1789 putkeys(const struct mpage *mpage, char *cp, size_t sz, uint64_t v)
1790 {
1791 struct ohash *htab;
1792 struct str *s;
1793 const char *end;
1794 unsigned int slot;
1795 int i, mustfree;
1796
1797 if (0 == sz)
1798 return;
1799
1800 mustfree = render_string(&cp, &sz);
1801
1802 if (TYPE_Nm & v) {
1803 htab = &names;
1804 v &= name_mask;
1805 if (v & NAME_FIRST)
1806 name_mask &= ~NAME_FIRST;
1807 if (debug > 1)
1808 say(mpage->mlinks->file,
1809 "Adding name %*s, bits=0x%llx", (int)sz, cp,
1810 (unsigned long long)v);
1811 } else {
1812 htab = &strings;
1813 if (debug > 1)
1814 for (i = 0; i < KEY_MAX; i++)
1815 if ((uint64_t)1 << i & v)
1816 say(mpage->mlinks->file,
1817 "Adding key %s=%*s",
1818 mansearch_keynames[i], (int)sz, cp);
1819 }
1820
1821 end = cp + sz;
1822 slot = ohash_qlookupi(htab, cp, &end);
1823 s = ohash_find(htab, slot);
1824
1825 if (NULL != s && mpage == s->mpage) {
1826 s->mask |= v;
1827 return;
1828 } else if (NULL == s) {
1829 s = mandoc_calloc(1, sizeof(struct str) + sz + 1);
1830 memcpy(s->key, cp, sz);
1831 ohash_insert(htab, slot, s);
1832 }
1833 s->mpage = mpage;
1834 s->mask = v;
1835
1836 if (mustfree)
1837 free(cp);
1838 }
1839
1840 /*
1841 * Take a Unicode codepoint and produce its UTF-8 encoding.
1842 * This isn't the best way to do this, but it works.
1843 * The magic numbers are from the UTF-8 packaging.
1844 * They're not as scary as they seem: read the UTF-8 spec for details.
1845 */
1846 static size_t
1847 utf8(unsigned int cp, char out[7])
1848 {
1849 size_t rc;
1850
1851 rc = 0;
1852 if (cp <= 0x0000007F) {
1853 rc = 1;
1854 out[0] = (char)cp;
1855 } else if (cp <= 0x000007FF) {
1856 rc = 2;
1857 out[0] = (cp >> 6 & 31) | 192;
1858 out[1] = (cp & 63) | 128;
1859 } else if (cp <= 0x0000FFFF) {
1860 rc = 3;
1861 out[0] = (cp >> 12 & 15) | 224;
1862 out[1] = (cp >> 6 & 63) | 128;
1863 out[2] = (cp & 63) | 128;
1864 } else if (cp <= 0x001FFFFF) {
1865 rc = 4;
1866 out[0] = (cp >> 18 & 7) | 240;
1867 out[1] = (cp >> 12 & 63) | 128;
1868 out[2] = (cp >> 6 & 63) | 128;
1869 out[3] = (cp & 63) | 128;
1870 } else if (cp <= 0x03FFFFFF) {
1871 rc = 5;
1872 out[0] = (cp >> 24 & 3) | 248;
1873 out[1] = (cp >> 18 & 63) | 128;
1874 out[2] = (cp >> 12 & 63) | 128;
1875 out[3] = (cp >> 6 & 63) | 128;
1876 out[4] = (cp & 63) | 128;
1877 } else if (cp <= 0x7FFFFFFF) {
1878 rc = 6;
1879 out[0] = (cp >> 30 & 1) | 252;
1880 out[1] = (cp >> 24 & 63) | 128;
1881 out[2] = (cp >> 18 & 63) | 128;
1882 out[3] = (cp >> 12 & 63) | 128;
1883 out[4] = (cp >> 6 & 63) | 128;
1884 out[5] = (cp & 63) | 128;
1885 } else
1886 return 0;
1887
1888 out[rc] = '\0';
1889 return rc;
1890 }
1891
1892 /*
1893 * If the string contains escape sequences,
1894 * replace it with an allocated rendering and return 1,
1895 * such that the caller can free it after use.
1896 * Otherwise, do nothing and return 0.
1897 */
1898 static int
1899 render_string(char **public, size_t *psz)
1900 {
1901 const char *src, *scp, *addcp, *seq;
1902 char *dst;
1903 size_t ssz, dsz, addsz;
1904 char utfbuf[7], res[6];
1905 int seqlen, unicode;
1906
1907 res[0] = '\\';
1908 res[1] = '\t';
1909 res[2] = ASCII_NBRSP;
1910 res[3] = ASCII_HYPH;
1911 res[4] = ASCII_BREAK;
1912 res[5] = '\0';
1913
1914 src = scp = *public;
1915 ssz = *psz;
1916 dst = NULL;
1917 dsz = 0;
1918
1919 while (scp < src + *psz) {
1920
1921 /* Leave normal characters unchanged. */
1922
1923 if (strchr(res, *scp) == NULL) {
1924 if (dst != NULL)
1925 dst[dsz++] = *scp;
1926 scp++;
1927 continue;
1928 }
1929
1930 /*
1931 * Found something that requires replacing,
1932 * make sure we have a destination buffer.
1933 */
1934
1935 if (dst == NULL) {
1936 dst = mandoc_malloc(ssz + 1);
1937 dsz = scp - src;
1938 memcpy(dst, src, dsz);
1939 }
1940
1941 /* Handle single-char special characters. */
1942
1943 switch (*scp) {
1944 case '\\':
1945 break;
1946 case '\t':
1947 case ASCII_NBRSP:
1948 dst[dsz++] = ' ';
1949 scp++;
1950 continue;
1951 case ASCII_HYPH:
1952 dst[dsz++] = '-';
1953 /* FALLTHROUGH */
1954 case ASCII_BREAK:
1955 scp++;
1956 continue;
1957 default:
1958 abort();
1959 }
1960
1961 /*
1962 * Found an escape sequence.
1963 * Read past the slash, then parse it.
1964 * Ignore everything except characters.
1965 */
1966
1967 scp++;
1968 if (mandoc_escape(&scp, &seq, &seqlen) != ESCAPE_SPECIAL)
1969 continue;
1970
1971 /*
1972 * Render the special character
1973 * as either UTF-8 or ASCII.
1974 */
1975
1976 if (write_utf8) {
1977 unicode = mchars_spec2cp(seq, seqlen);
1978 if (unicode <= 0)
1979 continue;
1980 addsz = utf8(unicode, utfbuf);
1981 if (addsz == 0)
1982 continue;
1983 addcp = utfbuf;
1984 } else {
1985 addcp = mchars_spec2str(seq, seqlen, &addsz);
1986 if (addcp == NULL)
1987 continue;
1988 if (*addcp == ASCII_NBRSP) {
1989 addcp = " ";
1990 addsz = 1;
1991 }
1992 }
1993
1994 /* Copy the rendered glyph into the stream. */
1995
1996 ssz += addsz;
1997 dst = mandoc_realloc(dst, ssz + 1);
1998 memcpy(dst + dsz, addcp, addsz);
1999 dsz += addsz;
2000 }
2001 if (dst != NULL) {
2002 *public = dst;
2003 *psz = dsz;
2004 }
2005
2006 /* Trim trailing whitespace and NUL-terminate. */
2007
2008 while (*psz > 0 && (*public)[*psz - 1] == ' ')
2009 --*psz;
2010 if (dst != NULL) {
2011 (*public)[*psz] = '\0';
2012 return 1;
2013 } else
2014 return 0;
2015 }
2016
2017 static void
2018 dbadd_mlink(const struct mlink *mlink)
2019 {
2020 dba_page_alias(mlink->mpage->dba, mlink->name, NAME_FILE);
2021 dba_page_add(mlink->mpage->dba, DBP_SECT, mlink->dsec);
2022 dba_page_add(mlink->mpage->dba, DBP_SECT, mlink->fsec);
2023 dba_page_add(mlink->mpage->dba, DBP_ARCH, mlink->arch);
2024 dba_page_add(mlink->mpage->dba, DBP_FILE, mlink->file);
2025 }
2026
2027 /*
2028 * Flush the current page's terms (and their bits) into the database.
2029 * Also, handle escape sequences at the last possible moment.
2030 */
2031 static void
2032 dbadd(struct dba *dba, struct mpage *mpage)
2033 {
2034 struct mlink *mlink;
2035 struct str *key;
2036 char *cp;
2037 uint64_t mask;
2038 size_t i;
2039 unsigned int slot;
2040 int mustfree;
2041
2042 mlink = mpage->mlinks;
2043
2044 if (nodb) {
2045 for (key = ohash_first(&names, &slot); NULL != key;
2046 key = ohash_next(&names, &slot))
2047 free(key);
2048 for (key = ohash_first(&strings, &slot); NULL != key;
2049 key = ohash_next(&strings, &slot))
2050 free(key);
2051 if (0 == debug)
2052 return;
2053 while (NULL != mlink) {
2054 fputs(mlink->name, stdout);
2055 if (NULL == mlink->next ||
2056 strcmp(mlink->dsec, mlink->next->dsec) ||
2057 strcmp(mlink->fsec, mlink->next->fsec) ||
2058 strcmp(mlink->arch, mlink->next->arch)) {
2059 putchar('(');
2060 if ('\0' == *mlink->dsec)
2061 fputs(mlink->fsec, stdout);
2062 else
2063 fputs(mlink->dsec, stdout);
2064 if ('\0' != *mlink->arch)
2065 printf("/%s", mlink->arch);
2066 putchar(')');
2067 }
2068 mlink = mlink->next;
2069 if (NULL != mlink)
2070 fputs(", ", stdout);
2071 }
2072 printf(" - %s\n", mpage->desc);
2073 return;
2074 }
2075
2076 if (debug)
2077 say(mlink->file, "Adding to database");
2078
2079 cp = mpage->desc;
2080 i = strlen(cp);
2081 mustfree = render_string(&cp, &i);
2082 mpage->dba = dba_page_new(dba->pages,
2083 *mpage->arch == '\0' ? mlink->arch : mpage->arch,
2084 cp, mlink->file, mpage->form);
2085 if (mustfree)
2086 free(cp);
2087 dba_page_add(mpage->dba, DBP_SECT, mpage->sec);
2088
2089 while (mlink != NULL) {
2090 dbadd_mlink(mlink);
2091 mlink = mlink->next;
2092 }
2093
2094 for (key = ohash_first(&names, &slot); NULL != key;
2095 key = ohash_next(&names, &slot)) {
2096 assert(key->mpage == mpage);
2097 dba_page_alias(mpage->dba, key->key, key->mask);
2098 free(key);
2099 }
2100 for (key = ohash_first(&strings, &slot); NULL != key;
2101 key = ohash_next(&strings, &slot)) {
2102 assert(key->mpage == mpage);
2103 i = 0;
2104 for (mask = TYPE_Xr; mask <= TYPE_Lb; mask *= 2) {
2105 if (key->mask & mask)
2106 dba_macro_add(dba->macros, i,
2107 key->key, mpage->dba);
2108 i++;
2109 }
2110 free(key);
2111 }
2112 }
2113
2114 static void
2115 dbprune(struct dba *dba)
2116 {
2117 struct dba_array *page, *files;
2118 char *file;
2119
2120 dba_array_FOREACH(dba->pages, page) {
2121 files = dba_array_get(page, DBP_FILE);
2122 dba_array_FOREACH(files, file) {
2123 if (*file < ' ')
2124 file++;
2125 if (ohash_find(&mlinks, ohash_qlookup(&mlinks,
2126 file)) != NULL) {
2127 if (debug)
2128 say(file, "Deleting from database");
2129 dba_array_del(dba->pages);
2130 break;
2131 }
2132 }
2133 }
2134 }
2135
2136 /*
2137 * Write the database from memory to disk.
2138 */
2139 static void
2140 dbwrite(struct dba *dba)
2141 {
2142 struct stat sb1, sb2;
2143 char tfn[33], *cp1, *cp2;
2144 off_t i;
2145 int fd1, fd2;
2146
2147 /*
2148 * Do not write empty databases, and delete existing ones
2149 * when makewhatis -u causes them to become empty.
2150 */
2151
2152 dba_array_start(dba->pages);
2153 if (dba_array_next(dba->pages) == NULL) {
2154 if (unlink(MANDOC_DB) == -1 && errno != ENOENT)
2155 say(MANDOC_DB, "&unlink");
2156 return;
2157 }
2158
2159 /*
2160 * Build the database in a temporary file,
2161 * then atomically move it into place.
2162 */
2163
2164 if (dba_write(MANDOC_DB "~", dba) != -1) {
2165 if (rename(MANDOC_DB "~", MANDOC_DB) == -1) {
2166 exitcode = (int)MANDOCLEVEL_SYSERR;
2167 say(MANDOC_DB, "&rename");
2168 unlink(MANDOC_DB "~");
2169 }
2170 return;
2171 }
2172
2173 /*
2174 * We lack write permission and cannot replace the database
2175 * file, but let's at least check whether the data changed.
2176 */
2177
2178 (void)strlcpy(tfn, "/tmp/mandocdb.XXXXXXXX", sizeof(tfn));
2179 if (mkdtemp(tfn) == NULL) {
2180 exitcode = (int)MANDOCLEVEL_SYSERR;
2181 say("", "&%s", tfn);
2182 return;
2183 }
2184 cp1 = cp2 = MAP_FAILED;
2185 fd1 = fd2 = -1;
2186 (void)strlcat(tfn, "/" MANDOC_DB, sizeof(tfn));
2187 if (dba_write(tfn, dba) == -1) {
2188 say(tfn, "&dba_write");
2189 goto err;
2190 }
2191 if ((fd1 = open(MANDOC_DB, O_RDONLY, 0)) == -1) {
2192 say(MANDOC_DB, "&open");
2193 goto err;
2194 }
2195 if ((fd2 = open(tfn, O_RDONLY, 0)) == -1) {
2196 say(tfn, "&open");
2197 goto err;
2198 }
2199 if (fstat(fd1, &sb1) == -1) {
2200 say(MANDOC_DB, "&fstat");
2201 goto err;
2202 }
2203 if (fstat(fd2, &sb2) == -1) {
2204 say(tfn, "&fstat");
2205 goto err;
2206 }
2207 if (sb1.st_size != sb2.st_size)
2208 goto err;
2209 if ((cp1 = mmap(NULL, sb1.st_size, PROT_READ, MAP_PRIVATE,
2210 fd1, 0)) == MAP_FAILED) {
2211 say(MANDOC_DB, "&mmap");
2212 goto err;
2213 }
2214 if ((cp2 = mmap(NULL, sb2.st_size, PROT_READ, MAP_PRIVATE,
2215 fd2, 0)) == MAP_FAILED) {
2216 say(tfn, "&mmap");
2217 goto err;
2218 }
2219 for (i = 0; i < sb1.st_size; i++)
2220 if (cp1[i] != cp2[i])
2221 goto err;
2222 goto out;
2223
2224 err:
2225 exitcode = (int)MANDOCLEVEL_SYSERR;
2226 say(MANDOC_DB, "Data changed, but cannot replace database");
2227
2228 out:
2229 if (cp1 != MAP_FAILED)
2230 munmap(cp1, sb1.st_size);
2231 if (cp2 != MAP_FAILED)
2232 munmap(cp2, sb2.st_size);
2233 if (fd1 != -1)
2234 close(fd1);
2235 if (fd2 != -1)
2236 close(fd2);
2237 unlink(tfn);
2238 *strrchr(tfn, '/') = '\0';
2239 rmdir(tfn);
2240 }
2241
2242 static int
2243 set_basedir(const char *targetdir, int report_baddir)
2244 {
2245 static char startdir[PATH_MAX];
2246 static int getcwd_status; /* 1 = ok, 2 = failure */
2247 static int chdir_status; /* 1 = changed directory */
2248 char *cp;
2249
2250 /*
2251 * Remember the original working directory, if possible.
2252 * This will be needed if the second or a later directory
2253 * on the command line is given as a relative path.
2254 * Do not error out if the current directory is not
2255 * searchable: Maybe it won't be needed after all.
2256 */
2257 if (0 == getcwd_status) {
2258 if (NULL == getcwd(startdir, sizeof(startdir))) {
2259 getcwd_status = 2;
2260 (void)strlcpy(startdir, strerror(errno),
2261 sizeof(startdir));
2262 } else
2263 getcwd_status = 1;
2264 }
2265
2266 /*
2267 * We are leaving the old base directory.
2268 * Do not use it any longer, not even for messages.
2269 */
2270 *basedir = '\0';
2271
2272 /*
2273 * If and only if the directory was changed earlier and
2274 * the next directory to process is given as a relative path,
2275 * first go back, or bail out if that is impossible.
2276 */
2277 if (chdir_status && '/' != *targetdir) {
2278 if (2 == getcwd_status) {
2279 exitcode = (int)MANDOCLEVEL_SYSERR;
2280 say("", "getcwd: %s", startdir);
2281 return 0;
2282 }
2283 if (-1 == chdir(startdir)) {
2284 exitcode = (int)MANDOCLEVEL_SYSERR;
2285 say("", "&chdir %s", startdir);
2286 return 0;
2287 }
2288 }
2289
2290 /*
2291 * Always resolve basedir to the canonicalized absolute
2292 * pathname and append a trailing slash, such that
2293 * we can reliably check whether files are inside.
2294 */
2295 if (NULL == realpath(targetdir, basedir)) {
2296 if (report_baddir || errno != ENOENT) {
2297 exitcode = (int)MANDOCLEVEL_BADARG;
2298 say("", "&%s: realpath", targetdir);
2299 }
2300 return 0;
2301 } else if (-1 == chdir(basedir)) {
2302 if (report_baddir || errno != ENOENT) {
2303 exitcode = (int)MANDOCLEVEL_BADARG;
2304 say("", "&chdir");
2305 }
2306 return 0;
2307 }
2308 chdir_status = 1;
2309 cp = strchr(basedir, '\0');
2310 if ('/' != cp[-1]) {
2311 if (cp - basedir >= PATH_MAX - 1) {
2312 exitcode = (int)MANDOCLEVEL_SYSERR;
2313 say("", "Filename too long");
2314 return 0;
2315 }
2316 *cp++ = '/';
2317 *cp = '\0';
2318 }
2319 return 1;
2320 }
2321
2322 static void
2323 say(const char *file, const char *format, ...)
2324 {
2325 va_list ap;
2326 int use_errno;
2327
2328 if ('\0' != *basedir)
2329 fprintf(stderr, "%s", basedir);
2330 if ('\0' != *basedir && '\0' != *file)
2331 fputc('/', stderr);
2332 if ('\0' != *file)
2333 fprintf(stderr, "%s", file);
2334
2335 use_errno = 1;
2336 if (NULL != format) {
2337 switch (*format) {
2338 case '&':
2339 format++;
2340 break;
2341 case '\0':
2342 format = NULL;
2343 break;
2344 default:
2345 use_errno = 0;
2346 break;
2347 }
2348 }
2349 if (NULL != format) {
2350 if ('\0' != *basedir || '\0' != *file)
2351 fputs(": ", stderr);
2352 va_start(ap, format);
2353 vfprintf(stderr, format, ap);
2354 va_end(ap);
2355 }
2356 if (use_errno) {
2357 if ('\0' != *basedir || '\0' != *file || NULL != format)
2358 fputs(": ", stderr);
2359 perror(NULL);
2360 } else
2361 fputc('\n', stderr);
2362 }
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