xref: /freebsd/contrib/mandoc/read.c (revision 42249ef2) 
1 /*	$Id: read.c,v 1.214 2019/07/10 19:39:01 schwarze Exp $ */
2 /*
3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4  * Copyright (c) 2010-2019 Ingo Schwarze <schwarze@openbsd.org>
5  * Copyright (c) 2010, 2012 Joerg Sonnenberger <joerg@netbsd.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 #include <errno.h>
28 #include <fcntl.h>
29 #include <stdarg.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <unistd.h>
34 #include <zlib.h>
35 
36 #include "mandoc_aux.h"
37 #include "mandoc.h"
38 #include "roff.h"
39 #include "mdoc.h"
40 #include "man.h"
41 #include "mandoc_parse.h"
42 #include "libmandoc.h"
43 #include "roff_int.h"
44 
45 #define	REPARSE_LIMIT	1000
46 
47 struct	mparse {
48 	struct roff	 *roff; /* roff parser (!NULL) */
49 	struct roff_man	 *man; /* man parser */
50 	struct buf	 *primary; /* buffer currently being parsed */
51 	struct buf	 *secondary; /* copy of top level input */
52 	struct buf	 *loop; /* open .while request line */
53 	const char	 *os_s; /* default operating system */
54 	int		  options; /* parser options */
55 	int		  gzip; /* current input file is gzipped */
56 	int		  filenc; /* encoding of the current file */
57 	int		  reparse_count; /* finite interp. stack */
58 	int		  line; /* line number in the file */
59 };
60 
61 static	void	  choose_parser(struct mparse *);
62 static	void	  free_buf_list(struct buf *);
63 static	void	  resize_buf(struct buf *, size_t);
64 static	int	  mparse_buf_r(struct mparse *, struct buf, size_t, int);
65 static	int	  read_whole_file(struct mparse *, int, struct buf *, int *);
66 static	void	  mparse_end(struct mparse *);
67 
68 
69 static void
70 resize_buf(struct buf *buf, size_t initial)
71 {
72 
73 	buf->sz = buf->sz > initial/2 ? 2 * buf->sz : initial;
74 	buf->buf = mandoc_realloc(buf->buf, buf->sz);
75 }
76 
77 static void
78 free_buf_list(struct buf *buf)
79 {
80 	struct buf *tmp;
81 
82 	while (buf != NULL) {
83 		tmp = buf;
84 		buf = tmp->next;
85 		free(tmp->buf);
86 		free(tmp);
87 	}
88 }
89 
90 static void
91 choose_parser(struct mparse *curp)
92 {
93 	char		*cp, *ep;
94 	int		 format;
95 
96 	/*
97 	 * If neither command line arguments -mdoc or -man select
98 	 * a parser nor the roff parser found a .Dd or .TH macro
99 	 * yet, look ahead in the main input buffer.
100 	 */
101 
102 	if ((format = roff_getformat(curp->roff)) == 0) {
103 		cp = curp->primary->buf;
104 		ep = cp + curp->primary->sz;
105 		while (cp < ep) {
106 			if (*cp == '.' || *cp == '\'') {
107 				cp++;
108 				if (cp[0] == 'D' && cp[1] == 'd') {
109 					format = MPARSE_MDOC;
110 					break;
111 				}
112 				if (cp[0] == 'T' && cp[1] == 'H') {
113 					format = MPARSE_MAN;
114 					break;
115 				}
116 			}
117 			cp = memchr(cp, '\n', ep - cp);
118 			if (cp == NULL)
119 				break;
120 			cp++;
121 		}
122 	}
123 
124 	if (format == MPARSE_MDOC) {
125 		curp->man->meta.macroset = MACROSET_MDOC;
126 		if (curp->man->mdocmac == NULL)
127 			curp->man->mdocmac = roffhash_alloc(MDOC_Dd, MDOC_MAX);
128 	} else {
129 		curp->man->meta.macroset = MACROSET_MAN;
130 		if (curp->man->manmac == NULL)
131 			curp->man->manmac = roffhash_alloc(MAN_TH, MAN_MAX);
132 	}
133 	curp->man->meta.first->tok = TOKEN_NONE;
134 }
135 
136 /*
137  * Main parse routine for a buffer.
138  * It assumes encoding and line numbering are already set up.
139  * It can recurse directly (for invocations of user-defined
140  * macros, inline equations, and input line traps)
141  * and indirectly (for .so file inclusion).
142  */
143 static int
144 mparse_buf_r(struct mparse *curp, struct buf blk, size_t i, int start)
145 {
146 	struct buf	 ln;
147 	struct buf	*firstln, *lastln, *thisln, *loop;
148 	char		*cp;
149 	size_t		 pos; /* byte number in the ln buffer */
150 	int		 line_result, result;
151 	int		 of;
152 	int		 lnn; /* line number in the real file */
153 	int		 fd;
154 	int		 inloop; /* Saw .while on this level. */
155 	unsigned char	 c;
156 
157 	ln.sz = 256;
158 	ln.buf = mandoc_malloc(ln.sz);
159 	ln.next = NULL;
160 	firstln = lastln = loop = NULL;
161 	lnn = curp->line;
162 	pos = 0;
163 	inloop = 0;
164 	result = ROFF_CONT;
165 
166 	while (i < blk.sz && (blk.buf[i] != '\0' || pos != 0)) {
167 		if (start) {
168 			curp->line = lnn;
169 			curp->reparse_count = 0;
170 
171 			if (lnn < 3 &&
172 			    curp->filenc & MPARSE_UTF8 &&
173 			    curp->filenc & MPARSE_LATIN1)
174 				curp->filenc = preconv_cue(&blk, i);
175 		}
176 
177 		while (i < blk.sz && (start || blk.buf[i] != '\0')) {
178 
179 			/*
180 			 * When finding an unescaped newline character,
181 			 * leave the character loop to process the line.
182 			 * Skip a preceding carriage return, if any.
183 			 */
184 
185 			if ('\r' == blk.buf[i] && i + 1 < blk.sz &&
186 			    '\n' == blk.buf[i + 1])
187 				++i;
188 			if ('\n' == blk.buf[i]) {
189 				++i;
190 				++lnn;
191 				break;
192 			}
193 
194 			/*
195 			 * Make sure we have space for the worst
196 			 * case of 12 bytes: "\\[u10ffff]\n\0"
197 			 */
198 
199 			if (pos + 12 > ln.sz)
200 				resize_buf(&ln, 256);
201 
202 			/*
203 			 * Encode 8-bit input.
204 			 */
205 
206 			c = blk.buf[i];
207 			if (c & 0x80) {
208 				if ( ! (curp->filenc && preconv_encode(
209 				    &blk, &i, &ln, &pos, &curp->filenc))) {
210 					mandoc_msg(MANDOCERR_CHAR_BAD,
211 					    curp->line, pos, "0x%x", c);
212 					ln.buf[pos++] = '?';
213 					i++;
214 				}
215 				continue;
216 			}
217 
218 			/*
219 			 * Exclude control characters.
220 			 */
221 
222 			if (c == 0x7f || (c < 0x20 && c != 0x09)) {
223 				mandoc_msg(c == 0x00 || c == 0x04 ||
224 				    c > 0x0a ? MANDOCERR_CHAR_BAD :
225 				    MANDOCERR_CHAR_UNSUPP,
226 				    curp->line, pos, "0x%x", c);
227 				i++;
228 				if (c != '\r')
229 					ln.buf[pos++] = '?';
230 				continue;
231 			}
232 
233 			ln.buf[pos++] = blk.buf[i++];
234 		}
235 		ln.buf[pos] = '\0';
236 
237 		/*
238 		 * Maintain a lookaside buffer of all lines.
239 		 * parsed from this input source.
240 		 */
241 
242 		thisln = mandoc_malloc(sizeof(*thisln));
243 		thisln->buf = mandoc_strdup(ln.buf);
244 		thisln->sz = strlen(ln.buf) + 1;
245 		thisln->next = NULL;
246 		if (firstln == NULL) {
247 			firstln = lastln = thisln;
248 			if (curp->secondary == NULL)
249 				curp->secondary = firstln;
250 		} else {
251 			lastln->next = thisln;
252 			lastln = thisln;
253 		}
254 
255 		/* XXX Ugly hack to mark the end of the input. */
256 
257 		if (i == blk.sz || blk.buf[i] == '\0') {
258 			if (pos + 2 > ln.sz)
259 				resize_buf(&ln, 256);
260 			ln.buf[pos++] = '\n';
261 			ln.buf[pos] = '\0';
262 		}
263 
264 		/*
265 		 * A significant amount of complexity is contained by
266 		 * the roff preprocessor.  It's line-oriented but can be
267 		 * expressed on one line, so we need at times to
268 		 * readjust our starting point and re-run it.  The roff
269 		 * preprocessor can also readjust the buffers with new
270 		 * data, so we pass them in wholesale.
271 		 */
272 
273 		of = 0;
274 rerun:
275 		line_result = roff_parseln(curp->roff, curp->line, &ln, &of);
276 
277 		/* Process options. */
278 
279 		if (line_result & ROFF_APPEND)
280 			assert(line_result == (ROFF_IGN | ROFF_APPEND));
281 
282 		if (line_result & ROFF_USERCALL)
283 			assert((line_result & ROFF_MASK) == ROFF_REPARSE);
284 
285 		if (line_result & ROFF_USERRET) {
286 			assert(line_result == (ROFF_IGN | ROFF_USERRET));
287 			if (start == 0) {
288 				/* Return from the current macro. */
289 				result = ROFF_USERRET;
290 				goto out;
291 			}
292 		}
293 
294 		switch (line_result & ROFF_LOOPMASK) {
295 		case ROFF_IGN:
296 			break;
297 		case ROFF_WHILE:
298 			if (curp->loop != NULL) {
299 				if (loop == curp->loop)
300 					break;
301 				mandoc_msg(MANDOCERR_WHILE_NEST,
302 				    curp->line, pos, NULL);
303 			}
304 			curp->loop = thisln;
305 			loop = NULL;
306 			inloop = 1;
307 			break;
308 		case ROFF_LOOPCONT:
309 		case ROFF_LOOPEXIT:
310 			if (curp->loop == NULL) {
311 				mandoc_msg(MANDOCERR_WHILE_FAIL,
312 				    curp->line, pos, NULL);
313 				break;
314 			}
315 			if (inloop == 0) {
316 				mandoc_msg(MANDOCERR_WHILE_INTO,
317 				    curp->line, pos, NULL);
318 				curp->loop = loop = NULL;
319 				break;
320 			}
321 			if (line_result & ROFF_LOOPCONT)
322 				loop = curp->loop;
323 			else {
324 				curp->loop = loop = NULL;
325 				inloop = 0;
326 			}
327 			break;
328 		default:
329 			abort();
330 		}
331 
332 		/* Process the main instruction from the roff parser. */
333 
334 		switch (line_result & ROFF_MASK) {
335 		case ROFF_IGN:
336 			break;
337 		case ROFF_CONT:
338 			if (curp->man->meta.macroset == MACROSET_NONE)
339 				choose_parser(curp);
340 			if ((curp->man->meta.macroset == MACROSET_MDOC ?
341 			     mdoc_parseln(curp->man, curp->line, ln.buf, of) :
342 			     man_parseln(curp->man, curp->line, ln.buf, of)
343 			    ) == 2)
344 				goto out;
345 			break;
346 		case ROFF_RERUN:
347 			goto rerun;
348 		case ROFF_REPARSE:
349 			if (++curp->reparse_count > REPARSE_LIMIT) {
350 				/* Abort and return to the top level. */
351 				result = ROFF_IGN;
352 				mandoc_msg(MANDOCERR_ROFFLOOP,
353 				    curp->line, pos, NULL);
354 				goto out;
355 			}
356 			result = mparse_buf_r(curp, ln, of, 0);
357 			if (line_result & ROFF_USERCALL) {
358 				roff_userret(curp->roff);
359 				/* Continue normally. */
360 				if (result & ROFF_USERRET)
361 					result = ROFF_CONT;
362 			}
363 			if (start == 0 && result != ROFF_CONT)
364 				goto out;
365 			break;
366 		case ROFF_SO:
367 			if ( ! (curp->options & MPARSE_SO) &&
368 			    (i >= blk.sz || blk.buf[i] == '\0')) {
369 				curp->man->meta.sodest =
370 				    mandoc_strdup(ln.buf + of);
371 				goto out;
372 			}
373 			if ((fd = mparse_open(curp, ln.buf + of)) != -1) {
374 				mparse_readfd(curp, fd, ln.buf + of);
375 				close(fd);
376 			} else {
377 				mandoc_msg(MANDOCERR_SO_FAIL,
378 				    curp->line, of, ".so %s: %s",
379 				    ln.buf + of, strerror(errno));
380 				ln.sz = mandoc_asprintf(&cp,
381 				    ".sp\nSee the file %s.\n.sp",
382 				    ln.buf + of);
383 				free(ln.buf);
384 				ln.buf = cp;
385 				of = 0;
386 				mparse_buf_r(curp, ln, of, 0);
387 			}
388 			break;
389 		default:
390 			abort();
391 		}
392 
393 		/* Start the next input line. */
394 
395 		if (loop != NULL &&
396 		    (line_result & ROFF_LOOPMASK) == ROFF_IGN)
397 			loop = loop->next;
398 
399 		if (loop != NULL) {
400 			if ((line_result & ROFF_APPEND) == 0)
401 				*ln.buf = '\0';
402 			if (ln.sz < loop->sz)
403 				resize_buf(&ln, loop->sz);
404 			(void)strlcat(ln.buf, loop->buf, ln.sz);
405 			of = 0;
406 			goto rerun;
407 		}
408 
409 		pos = (line_result & ROFF_APPEND) ? strlen(ln.buf) : 0;
410 	}
411 out:
412 	if (inloop) {
413 		if (result != ROFF_USERRET)
414 			mandoc_msg(MANDOCERR_WHILE_OUTOF,
415 			    curp->line, pos, NULL);
416 		curp->loop = NULL;
417 	}
418 	free(ln.buf);
419 	if (firstln != curp->secondary)
420 		free_buf_list(firstln);
421 	return result;
422 }
423 
424 static int
425 read_whole_file(struct mparse *curp, int fd, struct buf *fb, int *with_mmap)
426 {
427 	struct stat	 st;
428 	gzFile		 gz;
429 	size_t		 off;
430 	ssize_t		 ssz;
431 	int		 gzerrnum, retval;
432 
433 	if (fstat(fd, &st) == -1) {
434 		mandoc_msg(MANDOCERR_FSTAT, 0, 0, "%s", strerror(errno));
435 		return -1;
436 	}
437 
438 	/*
439 	 * If we're a regular file, try just reading in the whole entry
440 	 * via mmap().  This is faster than reading it into blocks, and
441 	 * since each file is only a few bytes to begin with, I'm not
442 	 * concerned that this is going to tank any machines.
443 	 */
444 
445 	if (curp->gzip == 0 && S_ISREG(st.st_mode)) {
446 		if (st.st_size > 0x7fffffff) {
447 			mandoc_msg(MANDOCERR_TOOLARGE, 0, 0, NULL);
448 			return -1;
449 		}
450 		*with_mmap = 1;
451 		fb->sz = (size_t)st.st_size;
452 		fb->buf = mmap(NULL, fb->sz, PROT_READ, MAP_SHARED, fd, 0);
453 		if (fb->buf != MAP_FAILED)
454 			return 0;
455 	}
456 
457 	if (curp->gzip) {
458 		/*
459 		 * Duplicating the file descriptor is required
460 		 * because we will have to call gzclose(3)
461 		 * to free memory used internally by zlib,
462 		 * but that will also close the file descriptor,
463 		 * which this function must not do.
464 		 */
465 		if ((fd = dup(fd)) == -1) {
466 			mandoc_msg(MANDOCERR_DUP, 0, 0,
467 			    "%s", strerror(errno));
468 			return -1;
469 		}
470 		if ((gz = gzdopen(fd, "rb")) == NULL) {
471 			mandoc_msg(MANDOCERR_GZDOPEN, 0, 0,
472 			    "%s", strerror(errno));
473 			close(fd);
474 			return -1;
475 		}
476 	} else
477 		gz = NULL;
478 
479 	/*
480 	 * If this isn't a regular file (like, say, stdin), then we must
481 	 * go the old way and just read things in bit by bit.
482 	 */
483 
484 	*with_mmap = 0;
485 	off = 0;
486 	retval = -1;
487 	fb->sz = 0;
488 	fb->buf = NULL;
489 	for (;;) {
490 		if (off == fb->sz) {
491 			if (fb->sz == (1U << 31)) {
492 				mandoc_msg(MANDOCERR_TOOLARGE, 0, 0, NULL);
493 				break;
494 			}
495 			resize_buf(fb, 65536);
496 		}
497 		ssz = curp->gzip ?
498 		    gzread(gz, fb->buf + (int)off, fb->sz - off) :
499 		    read(fd, fb->buf + (int)off, fb->sz - off);
500 		if (ssz == 0) {
501 			fb->sz = off;
502 			retval = 0;
503 			break;
504 		}
505 		if (ssz == -1) {
506 			if (curp->gzip)
507 				(void)gzerror(gz, &gzerrnum);
508 			mandoc_msg(MANDOCERR_READ, 0, 0, "%s",
509 			    curp->gzip && gzerrnum != Z_ERRNO ?
510 			    zError(gzerrnum) : strerror(errno));
511 			break;
512 		}
513 		off += (size_t)ssz;
514 	}
515 
516 	if (curp->gzip && (gzerrnum = gzclose(gz)) != Z_OK)
517 		mandoc_msg(MANDOCERR_GZCLOSE, 0, 0, "%s",
518 		    gzerrnum == Z_ERRNO ? strerror(errno) :
519 		    zError(gzerrnum));
520 	if (retval == -1) {
521 		free(fb->buf);
522 		fb->buf = NULL;
523 	}
524 	return retval;
525 }
526 
527 static void
528 mparse_end(struct mparse *curp)
529 {
530 	if (curp->man->meta.macroset == MACROSET_NONE)
531 		curp->man->meta.macroset = MACROSET_MAN;
532 	if (curp->man->meta.macroset == MACROSET_MDOC)
533 		mdoc_endparse(curp->man);
534 	else
535 		man_endparse(curp->man);
536 	roff_endparse(curp->roff);
537 }
538 
539 /*
540  * Read the whole file into memory and call the parsers.
541  * Called recursively when an .so request is encountered.
542  */
543 void
544 mparse_readfd(struct mparse *curp, int fd, const char *filename)
545 {
546 	static int	 recursion_depth;
547 
548 	struct buf	 blk;
549 	struct buf	*save_primary;
550 	const char	*save_filename;
551 	size_t		 offset;
552 	int		 save_filenc, save_lineno;
553 	int		 with_mmap;
554 
555 	if (recursion_depth > 64) {
556 		mandoc_msg(MANDOCERR_ROFFLOOP, curp->line, 0, NULL);
557 		return;
558 	}
559 	if (read_whole_file(curp, fd, &blk, &with_mmap) == -1)
560 		return;
561 
562 	/*
563 	 * Save some properties of the parent file.
564 	 */
565 
566 	save_primary = curp->primary;
567 	save_filenc = curp->filenc;
568 	save_lineno = curp->line;
569 	save_filename = mandoc_msg_getinfilename();
570 
571 	curp->primary = &blk;
572 	curp->filenc = curp->options & (MPARSE_UTF8 | MPARSE_LATIN1);
573 	curp->line = 1;
574 	mandoc_msg_setinfilename(filename);
575 
576 	/* Skip an UTF-8 byte order mark. */
577 	if (curp->filenc & MPARSE_UTF8 && blk.sz > 2 &&
578 	    (unsigned char)blk.buf[0] == 0xef &&
579 	    (unsigned char)blk.buf[1] == 0xbb &&
580 	    (unsigned char)blk.buf[2] == 0xbf) {
581 		offset = 3;
582 		curp->filenc &= ~MPARSE_LATIN1;
583 	} else
584 		offset = 0;
585 
586 	recursion_depth++;
587 	mparse_buf_r(curp, blk, offset, 1);
588 	if (--recursion_depth == 0)
589 		mparse_end(curp);
590 
591 	/*
592 	 * Clean up and restore saved parent properties.
593 	 */
594 
595 	if (with_mmap)
596 		munmap(blk.buf, blk.sz);
597 	else
598 		free(blk.buf);
599 
600 	curp->primary = save_primary;
601 	curp->filenc = save_filenc;
602 	curp->line = save_lineno;
603 	if (save_filename != NULL)
604 		mandoc_msg_setinfilename(save_filename);
605 }
606 
607 int
608 mparse_open(struct mparse *curp, const char *file)
609 {
610 	char		 *cp;
611 	int		  fd, save_errno;
612 
613 	cp = strrchr(file, '.');
614 	curp->gzip = (cp != NULL && ! strcmp(cp + 1, "gz"));
615 
616 	/* First try to use the filename as it is. */
617 
618 	if ((fd = open(file, O_RDONLY)) != -1)
619 		return fd;
620 
621 	/*
622 	 * If that doesn't work and the filename doesn't
623 	 * already  end in .gz, try appending .gz.
624 	 */
625 
626 	if ( ! curp->gzip) {
627 		save_errno = errno;
628 		mandoc_asprintf(&cp, "%s.gz", file);
629 		fd = open(cp, O_RDONLY);
630 		free(cp);
631 		errno = save_errno;
632 		if (fd != -1) {
633 			curp->gzip = 1;
634 			return fd;
635 		}
636 	}
637 
638 	/* Neither worked, give up. */
639 
640 	return -1;
641 }
642 
643 struct mparse *
644 mparse_alloc(int options, enum mandoc_os os_e, const char *os_s)
645 {
646 	struct mparse	*curp;
647 
648 	curp = mandoc_calloc(1, sizeof(struct mparse));
649 
650 	curp->options = options;
651 	curp->os_s = os_s;
652 
653 	curp->roff = roff_alloc(options);
654 	curp->man = roff_man_alloc(curp->roff, curp->os_s,
655 		curp->options & MPARSE_QUICK ? 1 : 0);
656 	if (curp->options & MPARSE_MDOC) {
657 		curp->man->meta.macroset = MACROSET_MDOC;
658 		if (curp->man->mdocmac == NULL)
659 			curp->man->mdocmac = roffhash_alloc(MDOC_Dd, MDOC_MAX);
660 	} else if (curp->options & MPARSE_MAN) {
661 		curp->man->meta.macroset = MACROSET_MAN;
662 		if (curp->man->manmac == NULL)
663 			curp->man->manmac = roffhash_alloc(MAN_TH, MAN_MAX);
664 	}
665 	curp->man->meta.first->tok = TOKEN_NONE;
666 	curp->man->meta.os_e = os_e;
667 	return curp;
668 }
669 
670 void
671 mparse_reset(struct mparse *curp)
672 {
673 	roff_reset(curp->roff);
674 	roff_man_reset(curp->man);
675 	free_buf_list(curp->secondary);
676 	curp->secondary = NULL;
677 	curp->gzip = 0;
678 }
679 
680 void
681 mparse_free(struct mparse *curp)
682 {
683 	roffhash_free(curp->man->mdocmac);
684 	roffhash_free(curp->man->manmac);
685 	roff_man_free(curp->man);
686 	roff_free(curp->roff);
687 	free_buf_list(curp->secondary);
688 	free(curp);
689 }
690 
691 struct roff_meta *
692 mparse_result(struct mparse *curp)
693 {
694 	roff_state_reset(curp->man);
695 	if (curp->options & MPARSE_VALIDATE) {
696 		if (curp->man->meta.macroset == MACROSET_MDOC)
697 			mdoc_validate(curp->man);
698 		else
699 			man_validate(curp->man);
700 	}
701 	return &curp->man->meta;
702 }
703 
704 void
705 mparse_copy(const struct mparse *p)
706 {
707 	struct buf	*buf;
708 
709 	for (buf = p->secondary; buf != NULL; buf = buf->next)
710 		puts(buf->buf);
711 }
712