1 /* $Id: man_validate.c,v 1.80 2012/01/03 15:16:24 kristaps Exp $ */
2 /*
3 * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18 #ifdef HAVE_CONFIG_H
19 #include "config.h"
20 #endif
21
22 #include <sys/types.h>
23
24 #include <assert.h>
25 #include <ctype.h>
26 #include <errno.h>
27 #include <limits.h>
28 #include <stdarg.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <time.h>
32
33 #include "man.h"
34 #include "mandoc.h"
35 #include "libman.h"
36 #include "libmandoc.h"
37
38 #define CHKARGS struct man *m, struct man_node *n
39
40 typedef int (*v_check)(CHKARGS);
41
42 struct man_valid {
43 v_check *pres;
44 v_check *posts;
45 };
46
47 static int check_eq0(CHKARGS);
48 static int check_eq2(CHKARGS);
49 static int check_le1(CHKARGS);
50 static int check_ge2(CHKARGS);
51 static int check_le5(CHKARGS);
52 static int check_par(CHKARGS);
53 static int check_part(CHKARGS);
54 static int check_root(CHKARGS);
55 static void check_text(CHKARGS);
56
57 static int post_AT(CHKARGS);
58 static int post_vs(CHKARGS);
59 static int post_fi(CHKARGS);
60 static int post_ft(CHKARGS);
61 static int post_nf(CHKARGS);
62 static int post_sec(CHKARGS);
63 static int post_TH(CHKARGS);
64 static int post_UC(CHKARGS);
65 static int pre_sec(CHKARGS);
66
67 static v_check posts_at[] = { post_AT, NULL };
68 static v_check posts_br[] = { post_vs, check_eq0, NULL };
69 static v_check posts_eq0[] = { check_eq0, NULL };
70 static v_check posts_eq2[] = { check_eq2, NULL };
71 static v_check posts_fi[] = { check_eq0, post_fi, NULL };
72 static v_check posts_ft[] = { post_ft, NULL };
73 static v_check posts_nf[] = { check_eq0, post_nf, NULL };
74 static v_check posts_par[] = { check_par, NULL };
75 static v_check posts_part[] = { check_part, NULL };
76 static v_check posts_sec[] = { post_sec, NULL };
77 static v_check posts_sp[] = { post_vs, check_le1, NULL };
78 static v_check posts_th[] = { check_ge2, check_le5, post_TH, NULL };
79 static v_check posts_uc[] = { post_UC, NULL };
80 static v_check pres_sec[] = { pre_sec, NULL };
81
82 static const struct man_valid man_valids[MAN_MAX] = {
83 { NULL, posts_br }, /* br */
84 { NULL, posts_th }, /* TH */
85 { pres_sec, posts_sec }, /* SH */
86 { pres_sec, posts_sec }, /* SS */
87 { NULL, NULL }, /* TP */
88 { NULL, posts_par }, /* LP */
89 { NULL, posts_par }, /* PP */
90 { NULL, posts_par }, /* P */
91 { NULL, NULL }, /* IP */
92 { NULL, NULL }, /* HP */
93 { NULL, NULL }, /* SM */
94 { NULL, NULL }, /* SB */
95 { NULL, NULL }, /* BI */
96 { NULL, NULL }, /* IB */
97 { NULL, NULL }, /* BR */
98 { NULL, NULL }, /* RB */
99 { NULL, NULL }, /* R */
100 { NULL, NULL }, /* B */
101 { NULL, NULL }, /* I */
102 { NULL, NULL }, /* IR */
103 { NULL, NULL }, /* RI */
104 { NULL, posts_eq0 }, /* na */
105 { NULL, posts_sp }, /* sp */
106 { NULL, posts_nf }, /* nf */
107 { NULL, posts_fi }, /* fi */
108 { NULL, NULL }, /* RE */
109 { NULL, posts_part }, /* RS */
110 { NULL, NULL }, /* DT */
111 { NULL, posts_uc }, /* UC */
112 { NULL, NULL }, /* PD */
113 { NULL, posts_at }, /* AT */
114 { NULL, NULL }, /* in */
115 { NULL, posts_ft }, /* ft */
116 { NULL, posts_eq2 }, /* OP */
117 };
118
119
120 int
121 man_valid_pre(struct man *m, struct man_node *n)
122 {
123 v_check *cp;
124
125 switch (n->type) {
126 case (MAN_TEXT):
127 /* FALLTHROUGH */
128 case (MAN_ROOT):
129 /* FALLTHROUGH */
130 case (MAN_EQN):
131 /* FALLTHROUGH */
132 case (MAN_TBL):
133 return(1);
134 default:
135 break;
136 }
137
138 if (NULL == (cp = man_valids[n->tok].pres))
139 return(1);
140 for ( ; *cp; cp++)
141 if ( ! (*cp)(m, n))
142 return(0);
143 return(1);
144 }
145
146
147 int
148 man_valid_post(struct man *m)
149 {
150 v_check *cp;
151
152 if (MAN_VALID & m->last->flags)
153 return(1);
154 m->last->flags |= MAN_VALID;
155
156 switch (m->last->type) {
157 case (MAN_TEXT):
158 check_text(m, m->last);
159 return(1);
160 case (MAN_ROOT):
161 return(check_root(m, m->last));
162 case (MAN_EQN):
163 /* FALLTHROUGH */
164 case (MAN_TBL):
165 return(1);
166 default:
167 break;
168 }
169
170 if (NULL == (cp = man_valids[m->last->tok].posts))
171 return(1);
172 for ( ; *cp; cp++)
173 if ( ! (*cp)(m, m->last))
174 return(0);
175
176 return(1);
177 }
178
179
180 static int
181 check_root(CHKARGS)
182 {
183
184 if (MAN_BLINE & m->flags)
185 man_nmsg(m, n, MANDOCERR_SCOPEEXIT);
186 else if (MAN_ELINE & m->flags)
187 man_nmsg(m, n, MANDOCERR_SCOPEEXIT);
188
189 m->flags &= ~MAN_BLINE;
190 m->flags &= ~MAN_ELINE;
191
192 if (NULL == m->first->child) {
193 man_nmsg(m, n, MANDOCERR_NODOCBODY);
194 return(0);
195 } else if (NULL == m->meta.title) {
196 man_nmsg(m, n, MANDOCERR_NOTITLE);
197
198 /*
199 * If a title hasn't been set, do so now (by
200 * implication, date and section also aren't set).
201 */
202
203 m->meta.title = mandoc_strdup("unknown");
204 m->meta.msec = mandoc_strdup("1");
205 m->meta.date = mandoc_normdate
206 (m->parse, NULL, n->line, n->pos);
207 }
208
209 return(1);
210 }
211
212 static void
213 check_text(CHKARGS)
214 {
215 char *cp, *p;
216
217 if (MAN_LITERAL & m->flags)
218 return;
219
220 cp = n->string;
221 for (p = cp; NULL != (p = strchr(p, '\t')); p++)
222 man_pmsg(m, n->line, (int)(p - cp), MANDOCERR_BADTAB);
223 }
224
225 #define INEQ_DEFINE(x, ineq, name) \
226 static int \
227 check_##name(CHKARGS) \
228 { \
229 if (n->nchild ineq (x)) \
230 return(1); \
231 mandoc_vmsg(MANDOCERR_ARGCOUNT, m->parse, n->line, n->pos, \
232 "line arguments %s %d (have %d)", \
233 #ineq, (x), n->nchild); \
234 return(1); \
235 }
236
237 INEQ_DEFINE(0, ==, eq0)
238 INEQ_DEFINE(2, ==, eq2)
239 INEQ_DEFINE(1, <=, le1)
240 INEQ_DEFINE(2, >=, ge2)
241 INEQ_DEFINE(5, <=, le5)
242
243 static int
244 post_ft(CHKARGS)
245 {
246 char *cp;
247 int ok;
248
249 if (0 == n->nchild)
250 return(1);
251
252 ok = 0;
253 cp = n->child->string;
254 switch (*cp) {
255 case ('1'):
256 /* FALLTHROUGH */
257 case ('2'):
258 /* FALLTHROUGH */
259 case ('3'):
260 /* FALLTHROUGH */
261 case ('4'):
262 /* FALLTHROUGH */
263 case ('I'):
264 /* FALLTHROUGH */
265 case ('P'):
266 /* FALLTHROUGH */
267 case ('R'):
268 if ('\0' == cp[1])
269 ok = 1;
270 break;
271 case ('B'):
272 if ('\0' == cp[1] || ('I' == cp[1] && '\0' == cp[2]))
273 ok = 1;
274 break;
275 case ('C'):
276 if ('W' == cp[1] && '\0' == cp[2])
277 ok = 1;
278 break;
279 default:
280 break;
281 }
282
283 if (0 == ok) {
284 mandoc_vmsg
285 (MANDOCERR_BADFONT, m->parse,
286 n->line, n->pos, "%s", cp);
287 *cp = '\0';
288 }
289
290 if (1 < n->nchild)
291 mandoc_vmsg
292 (MANDOCERR_ARGCOUNT, m->parse, n->line,
293 n->pos, "want one child (have %d)",
294 n->nchild);
295
296 return(1);
297 }
298
299 static int
300 pre_sec(CHKARGS)
301 {
302
303 if (MAN_BLOCK == n->type)
304 m->flags &= ~MAN_LITERAL;
305 return(1);
306 }
307
308 static int
309 post_sec(CHKARGS)
310 {
311
312 if ( ! (MAN_HEAD == n->type && 0 == n->nchild))
313 return(1);
314
315 man_nmsg(m, n, MANDOCERR_SYNTARGCOUNT);
316 return(0);
317 }
318
319 static int
320 check_part(CHKARGS)
321 {
322
323 if (MAN_BODY == n->type && 0 == n->nchild)
324 mandoc_msg(MANDOCERR_ARGCWARN, m->parse, n->line,
325 n->pos, "want children (have none)");
326
327 return(1);
328 }
329
330
331 static int
332 check_par(CHKARGS)
333 {
334
335 switch (n->type) {
336 case (MAN_BLOCK):
337 if (0 == n->body->nchild)
338 man_node_delete(m, n);
339 break;
340 case (MAN_BODY):
341 if (0 == n->nchild)
342 man_nmsg(m, n, MANDOCERR_IGNPAR);
343 break;
344 case (MAN_HEAD):
345 if (n->nchild)
346 man_nmsg(m, n, MANDOCERR_ARGSLOST);
347 break;
348 default:
349 break;
350 }
351
352 return(1);
353 }
354
355
356 static int
357 post_TH(CHKARGS)
358 {
359 const char *p;
360 int line, pos;
361
362 if (m->meta.title)
363 free(m->meta.title);
364 if (m->meta.vol)
365 free(m->meta.vol);
366 if (m->meta.source)
367 free(m->meta.source);
368 if (m->meta.msec)
369 free(m->meta.msec);
370 if (m->meta.date)
371 free(m->meta.date);
372
373 line = n->line;
374 pos = n->pos;
375 m->meta.title = m->meta.vol = m->meta.date =
376 m->meta.msec = m->meta.source = NULL;
377
378 /* ->TITLE<- MSEC DATE SOURCE VOL */
379
380 n = n->child;
381 if (n && n->string) {
382 for (p = n->string; '\0' != *p; p++) {
383 /* Only warn about this once... */
384 if (isalpha((unsigned char)*p) &&
385 ! isupper((unsigned char)*p)) {
386 man_nmsg(m, n, MANDOCERR_UPPERCASE);
387 break;
388 }
389 }
390 m->meta.title = mandoc_strdup(n->string);
391 } else
392 m->meta.title = mandoc_strdup("");
393
394 /* TITLE ->MSEC<- DATE SOURCE VOL */
395
396 if (n)
397 n = n->next;
398 if (n && n->string)
399 m->meta.msec = mandoc_strdup(n->string);
400 else
401 m->meta.msec = mandoc_strdup("");
402
403 /* TITLE MSEC ->DATE<- SOURCE VOL */
404
405 if (n)
406 n = n->next;
407 if (n && n->string && '\0' != n->string[0]) {
408 pos = n->pos;
409 m->meta.date = mandoc_normdate
410 (m->parse, n->string, line, pos);
411 } else
412 m->meta.date = mandoc_strdup("");
413
414 /* TITLE MSEC DATE ->SOURCE<- VOL */
415
416 if (n && (n = n->next))
417 m->meta.source = mandoc_strdup(n->string);
418
419 /* TITLE MSEC DATE SOURCE ->VOL<- */
420 /* If missing, use the default VOL name for MSEC. */
421
422 if (n && (n = n->next))
423 m->meta.vol = mandoc_strdup(n->string);
424 else if ('\0' != m->meta.msec[0] &&
425 (NULL != (p = mandoc_a2msec(m->meta.msec))))
426 m->meta.vol = mandoc_strdup(p);
427
428 /*
429 * Remove the `TH' node after we've processed it for our
430 * meta-data.
431 */
432 man_node_delete(m, m->last);
433 return(1);
434 }
435
436 static int
437 post_nf(CHKARGS)
438 {
439
440 if (MAN_LITERAL & m->flags)
441 man_nmsg(m, n, MANDOCERR_SCOPEREP);
442
443 m->flags |= MAN_LITERAL;
444 return(1);
445 }
446
447 static int
448 post_fi(CHKARGS)
449 {
450
451 if ( ! (MAN_LITERAL & m->flags))
452 man_nmsg(m, n, MANDOCERR_WNOSCOPE);
453
454 m->flags &= ~MAN_LITERAL;
455 return(1);
456 }
457
458 static int
459 post_UC(CHKARGS)
460 {
461 static const char * const bsd_versions[] = {
462 "3rd Berkeley Distribution",
463 "4th Berkeley Distribution",
464 "4.2 Berkeley Distribution",
465 "4.3 Berkeley Distribution",
466 "4.4 Berkeley Distribution",
467 };
468
469 const char *p, *s;
470
471 n = n->child;
472
473 if (NULL == n || MAN_TEXT != n->type)
474 p = bsd_versions[0];
475 else {
476 s = n->string;
477 if (0 == strcmp(s, "3"))
478 p = bsd_versions[0];
479 else if (0 == strcmp(s, "4"))
480 p = bsd_versions[1];
481 else if (0 == strcmp(s, "5"))
482 p = bsd_versions[2];
483 else if (0 == strcmp(s, "6"))
484 p = bsd_versions[3];
485 else if (0 == strcmp(s, "7"))
486 p = bsd_versions[4];
487 else
488 p = bsd_versions[0];
489 }
490
491 if (m->meta.source)
492 free(m->meta.source);
493
494 m->meta.source = mandoc_strdup(p);
495 return(1);
496 }
497
498 static int
499 post_AT(CHKARGS)
500 {
501 static const char * const unix_versions[] = {
502 "7th Edition",
503 "System III",
504 "System V",
505 "System V Release 2",
506 };
507
508 const char *p, *s;
509 struct man_node *nn;
510
511 n = n->child;
512
513 if (NULL == n || MAN_TEXT != n->type)
514 p = unix_versions[0];
515 else {
516 s = n->string;
517 if (0 == strcmp(s, "3"))
518 p = unix_versions[0];
519 else if (0 == strcmp(s, "4"))
520 p = unix_versions[1];
521 else if (0 == strcmp(s, "5")) {
522 nn = n->next;
523 if (nn && MAN_TEXT == nn->type && nn->string[0])
524 p = unix_versions[3];
525 else
526 p = unix_versions[2];
527 } else
528 p = unix_versions[0];
529 }
530
531 if (m->meta.source)
532 free(m->meta.source);
533
534 m->meta.source = mandoc_strdup(p);
535 return(1);
536 }
537
538 static int
539 post_vs(CHKARGS)
540 {
541
542 /*
543 * Don't warn about this because it occurs in pod2man and would
544 * cause considerable (unfixable) warnage.
545 */
546 if (NULL == n->prev && MAN_ROOT == n->parent->type)
547 man_node_delete(m, n);
548
549 return(1);
550 }