xref: /openbsd-src/usr.bin/mandoc/read.c (revision c90a81c56dcebd6a1b73fe4aff9b03385b8e63b3) 
1 /*	$OpenBSD: read.c,v 1.182 2019/01/11 17:03:43 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 <sys/types.h>
20 #include <sys/mman.h>
21 #include <sys/stat.h>
22 
23 #include <assert.h>
24 #include <ctype.h>
25 #include <errno.h>
26 #include <fcntl.h>
27 #include <stdarg.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32 #include <zlib.h>
33 
34 #include "mandoc_aux.h"
35 #include "mandoc.h"
36 #include "roff.h"
37 #include "mdoc.h"
38 #include "man.h"
39 #include "mandoc_parse.h"
40 #include "libmandoc.h"
41 #include "roff_int.h"
42 
43 #define	REPARSE_LIMIT	1000
44 
45 struct	mparse {
46 	struct roff	 *roff; /* roff parser (!NULL) */
47 	struct roff_man	 *man; /* man parser */
48 	struct buf	 *primary; /* buffer currently being parsed */
49 	struct buf	 *secondary; /* copy of top level input */
50 	struct buf	 *loop; /* open .while request line */
51 	const char	 *os_s; /* default operating system */
52 	int		  options; /* parser options */
53 	int		  gzip; /* current input file is gzipped */
54 	int		  filenc; /* encoding of the current file */
55 	int		  reparse_count; /* finite interp. stack */
56 	int		  line; /* line number in the file */
57 };
58 
59 static	void	  choose_parser(struct mparse *);
60 static	void	  free_buf_list(struct buf *);
61 static	void	  resize_buf(struct buf *, size_t);
62 static	int	  mparse_buf_r(struct mparse *, struct buf, size_t, int);
63 static	int	  read_whole_file(struct mparse *, int, struct buf *, int *);
64 static	void	  mparse_end(struct mparse *);
65 
66 
67 static void
68 resize_buf(struct buf *buf, size_t initial)
69 {
70 
71 	buf->sz = buf->sz > initial/2 ? 2 * buf->sz : initial;
72 	buf->buf = mandoc_realloc(buf->buf, buf->sz);
73 }
74 
75 static void
76 free_buf_list(struct buf *buf)
77 {
78 	struct buf *tmp;
79 
80 	while (buf != NULL) {
81 		tmp = buf;
82 		buf = tmp->next;
83 		free(tmp->buf);
84 		free(tmp);
85 	}
86 }
87 
88 static void
89 choose_parser(struct mparse *curp)
90 {
91 	char		*cp, *ep;
92 	int		 format;
93 
94 	/*
95 	 * If neither command line arguments -mdoc or -man select
96 	 * a parser nor the roff parser found a .Dd or .TH macro
97 	 * yet, look ahead in the main input buffer.
98 	 */
99 
100 	if ((format = roff_getformat(curp->roff)) == 0) {
101 		cp = curp->primary->buf;
102 		ep = cp + curp->primary->sz;
103 		while (cp < ep) {
104 			if (*cp == '.' || *cp == '\'') {
105 				cp++;
106 				if (cp[0] == 'D' && cp[1] == 'd') {
107 					format = MPARSE_MDOC;
108 					break;
109 				}
110 				if (cp[0] == 'T' && cp[1] == 'H') {
111 					format = MPARSE_MAN;
112 					break;
113 				}
114 			}
115 			cp = memchr(cp, '\n', ep - cp);
116 			if (cp == NULL)
117 				break;
118 			cp++;
119 		}
120 	}
121 
122 	if (format == MPARSE_MDOC) {
123 		curp->man->meta.macroset = MACROSET_MDOC;
124 		if (curp->man->mdocmac == NULL)
125 			curp->man->mdocmac = roffhash_alloc(MDOC_Dd, MDOC_MAX);
126 	} else {
127 		curp->man->meta.macroset = MACROSET_MAN;
128 		if (curp->man->manmac == NULL)
129 			curp->man->manmac = roffhash_alloc(MAN_TH, MAN_MAX);
130 	}
131 	curp->man->meta.first->tok = TOKEN_NONE;
132 }
133 
134 /*
135  * Main parse routine for a buffer.
136  * It assumes encoding and line numbering are already set up.
137  * It can recurse directly (for invocations of user-defined
138  * macros, inline equations, and input line traps)
139  * and indirectly (for .so file inclusion).
140  */
141 static int
142 mparse_buf_r(struct mparse *curp, struct buf blk, size_t i, int start)
143 {
144 	struct buf	 ln;
145 	struct buf	*firstln, *lastln, *thisln, *loop;
146 	char		*cp;
147 	size_t		 pos; /* byte number in the ln buffer */
148 	int		 line_result, result;
149 	int		 of;
150 	int		 lnn; /* line number in the real file */
151 	int		 fd;
152 	int		 inloop; /* Saw .while on this level. */
153 	unsigned char	 c;
154 
155 	ln.sz = 256;
156 	ln.buf = mandoc_malloc(ln.sz);
157 	ln.next = NULL;
158 	firstln = loop = NULL;
159 	lnn = curp->line;
160 	pos = 0;
161 	inloop = 0;
162 	result = ROFF_CONT;
163 
164 	while (i < blk.sz && (blk.buf[i] != '\0' || pos != 0)) {
165 		if (start) {
166 			curp->line = lnn;
167 			curp->reparse_count = 0;
168 
169 			if (lnn < 3 &&
170 			    curp->filenc & MPARSE_UTF8 &&
171 			    curp->filenc & MPARSE_LATIN1)
172 				curp->filenc = preconv_cue(&blk, i);
173 		}
174 
175 		while (i < blk.sz && (start || blk.buf[i] != '\0')) {
176 
177 			/*
178 			 * When finding an unescaped newline character,
179 			 * leave the character loop to process the line.
180 			 * Skip a preceding carriage return, if any.
181 			 */
182 
183 			if ('\r' == blk.buf[i] && i + 1 < blk.sz &&
184 			    '\n' == blk.buf[i + 1])
185 				++i;
186 			if ('\n' == blk.buf[i]) {
187 				++i;
188 				++lnn;
189 				break;
190 			}
191 
192 			/*
193 			 * Make sure we have space for the worst
194 			 * case of 12 bytes: "\\[u10ffff]\n\0"
195 			 */
196 
197 			if (pos + 12 > ln.sz)
198 				resize_buf(&ln, 256);
199 
200 			/*
201 			 * Encode 8-bit input.
202 			 */
203 
204 			c = blk.buf[i];
205 			if (c & 0x80) {
206 				if ( ! (curp->filenc && preconv_encode(
207 				    &blk, &i, &ln, &pos, &curp->filenc))) {
208 					mandoc_msg(MANDOCERR_CHAR_BAD,
209 					    curp->line, pos, "0x%x", c);
210 					ln.buf[pos++] = '?';
211 					i++;
212 				}
213 				continue;
214 			}
215 
216 			/*
217 			 * Exclude control characters.
218 			 */
219 
220 			if (c == 0x7f || (c < 0x20 && c != 0x09)) {
221 				mandoc_msg(c == 0x00 || c == 0x04 ||
222 				    c > 0x0a ? MANDOCERR_CHAR_BAD :
223 				    MANDOCERR_CHAR_UNSUPP,
224 				    curp->line, pos, "0x%x", c);
225 				i++;
226 				if (c != '\r')
227 					ln.buf[pos++] = '?';
228 				continue;
229 			}
230 
231 			ln.buf[pos++] = blk.buf[i++];
232 		}
233 		ln.buf[pos] = '\0';
234 
235 		/*
236 		 * Maintain a lookaside buffer of all lines.
237 		 * parsed from this input source.
238 		 */
239 
240 		thisln = mandoc_malloc(sizeof(*thisln));
241 		thisln->buf = mandoc_strdup(ln.buf);
242 		thisln->sz = strlen(ln.buf) + 1;
243 		thisln->next = NULL;
244 		if (firstln == NULL) {
245 			firstln = lastln = thisln;
246 			if (curp->secondary == NULL)
247 				curp->secondary = firstln;
248 		} else {
249 			lastln->next = thisln;
250 			lastln = thisln;
251 		}
252 
253 		/* XXX Ugly hack to mark the end of the input. */
254 
255 		if (i == blk.sz || blk.buf[i] == '\0') {
256 			ln.buf[pos++] = '\n';
257 			ln.buf[pos] = '\0';
258 		}
259 
260 		/*
261 		 * A significant amount of complexity is contained by
262 		 * the roff preprocessor.  It's line-oriented but can be
263 		 * expressed on one line, so we need at times to
264 		 * readjust our starting point and re-run it.  The roff
265 		 * preprocessor can also readjust the buffers with new
266 		 * data, so we pass them in wholesale.
267 		 */
268 
269 		of = 0;
270 rerun:
271 		line_result = roff_parseln(curp->roff, curp->line, &ln, &of);
272 
273 		/* Process options. */
274 
275 		if (line_result & ROFF_APPEND)
276 			assert(line_result == (ROFF_IGN | ROFF_APPEND));
277 
278 		if (line_result & ROFF_USERCALL)
279 			assert((line_result & ROFF_MASK) == ROFF_REPARSE);
280 
281 		if (line_result & ROFF_USERRET) {
282 			assert(line_result == (ROFF_IGN | ROFF_USERRET));
283 			if (start == 0) {
284 				/* Return from the current macro. */
285 				result = ROFF_USERRET;
286 				goto out;
287 			}
288 		}
289 
290 		switch (line_result & ROFF_LOOPMASK) {
291 		case ROFF_IGN:
292 			break;
293 		case ROFF_WHILE:
294 			if (curp->loop != NULL) {
295 				if (loop == curp->loop)
296 					break;
297 				mandoc_msg(MANDOCERR_WHILE_NEST,
298 				    curp->line, pos, NULL);
299 			}
300 			curp->loop = thisln;
301 			loop = NULL;
302 			inloop = 1;
303 			break;
304 		case ROFF_LOOPCONT:
305 		case ROFF_LOOPEXIT:
306 			if (curp->loop == NULL) {
307 				mandoc_msg(MANDOCERR_WHILE_FAIL,
308 				    curp->line, pos, NULL);
309 				break;
310 			}
311 			if (inloop == 0) {
312 				mandoc_msg(MANDOCERR_WHILE_INTO,
313 				    curp->line, pos, NULL);
314 				curp->loop = loop = NULL;
315 				break;
316 			}
317 			if (line_result & ROFF_LOOPCONT)
318 				loop = curp->loop;
319 			else {
320 				curp->loop = loop = NULL;
321 				inloop = 0;
322 			}
323 			break;
324 		default:
325 			abort();
326 		}
327 
328 		/* Process the main instruction from the roff parser. */
329 
330 		switch (line_result & ROFF_MASK) {
331 		case ROFF_IGN:
332 			break;
333 		case ROFF_CONT:
334 			if (curp->man->meta.macroset == MACROSET_NONE)
335 				choose_parser(curp);
336 			if ((curp->man->meta.macroset == MACROSET_MDOC ?
337 			     mdoc_parseln(curp->man, curp->line, ln.buf, of) :
338 			     man_parseln(curp->man, curp->line, ln.buf, of)
339 			    ) == 2)
340 				goto out;
341 			break;
342 		case ROFF_RERUN:
343 			goto rerun;
344 		case ROFF_REPARSE:
345 			if (++curp->reparse_count > REPARSE_LIMIT) {
346 				/* Abort and return to the top level. */
347 				result = ROFF_IGN;
348 				mandoc_msg(MANDOCERR_ROFFLOOP,
349 				    curp->line, pos, NULL);
350 				goto out;
351 			}
352 			result = mparse_buf_r(curp, ln, of, 0);
353 			if (line_result & ROFF_USERCALL) {
354 				roff_userret(curp->roff);
355 				/* Continue normally. */
356 				if (result & ROFF_USERRET)
357 					result = ROFF_CONT;
358 			}
359 			if (start == 0 && result != ROFF_CONT)
360 				goto out;
361 			break;
362 		case ROFF_SO:
363 			if ( ! (curp->options & MPARSE_SO) &&
364 			    (i >= blk.sz || blk.buf[i] == '\0')) {
365 				curp->man->meta.sodest =
366 				    mandoc_strdup(ln.buf + of);
367 				goto out;
368 			}
369 			if ((fd = mparse_open(curp, ln.buf + of)) != -1) {
370 				mparse_readfd(curp, fd, ln.buf + of);
371 				close(fd);
372 			} else {
373 				mandoc_msg(MANDOCERR_SO_FAIL,
374 				    curp->line, of, ".so %s: %s",
375 				    ln.buf + of, strerror(errno));
376 				ln.sz = mandoc_asprintf(&cp,
377 				    ".sp\nSee the file %s.\n.sp",
378 				    ln.buf + of);
379 				free(ln.buf);
380 				ln.buf = cp;
381 				of = 0;
382 				mparse_buf_r(curp, ln, of, 0);
383 			}
384 			break;
385 		default:
386 			abort();
387 		}
388 
389 		/* Start the next input line. */
390 
391 		if (loop != NULL &&
392 		    (line_result & ROFF_LOOPMASK) == ROFF_IGN)
393 			loop = loop->next;
394 
395 		if (loop != NULL) {
396 			if ((line_result & ROFF_APPEND) == 0)
397 				*ln.buf = '\0';
398 			if (ln.sz < loop->sz)
399 				resize_buf(&ln, loop->sz);
400 			(void)strlcat(ln.buf, loop->buf, ln.sz);
401 			of = 0;
402 			goto rerun;
403 		}
404 
405 		pos = (line_result & ROFF_APPEND) ? strlen(ln.buf) : 0;
406 	}
407 out:
408 	if (inloop) {
409 		if (result != ROFF_USERRET)
410 			mandoc_msg(MANDOCERR_WHILE_OUTOF,
411 			    curp->line, pos, NULL);
412 		curp->loop = NULL;
413 	}
414 	free(ln.buf);
415 	if (firstln != curp->secondary)
416 		free_buf_list(firstln);
417 	return result;
418 }
419 
420 static int
421 read_whole_file(struct mparse *curp, int fd, struct buf *fb, int *with_mmap)
422 {
423 	struct stat	 st;
424 	gzFile		 gz;
425 	size_t		 off;
426 	ssize_t		 ssz;
427 	int		 gzerrnum, retval;
428 
429 	if (fstat(fd, &st) == -1) {
430 		mandoc_msg(MANDOCERR_FILE, 0, 0,
431 		    "fstat: %s", strerror(errno));
432 		return 0;
433 	}
434 
435 	/*
436 	 * If we're a regular file, try just reading in the whole entry
437 	 * via mmap().  This is faster than reading it into blocks, and
438 	 * since each file is only a few bytes to begin with, I'm not
439 	 * concerned that this is going to tank any machines.
440 	 */
441 
442 	if (curp->gzip == 0 && S_ISREG(st.st_mode)) {
443 		if (st.st_size > 0x7fffffff) {
444 			mandoc_msg(MANDOCERR_TOOLARGE, 0, 0, NULL);
445 			return 0;
446 		}
447 		*with_mmap = 1;
448 		fb->sz = (size_t)st.st_size;
449 		fb->buf = mmap(NULL, fb->sz, PROT_READ, MAP_SHARED, fd, 0);
450 		if (fb->buf != MAP_FAILED)
451 			return 1;
452 	}
453 
454 	if (curp->gzip) {
455 		/*
456 		 * Duplicating the file descriptor is required
457 		 * because we will have to call gzclose(3)
458 		 * to free memory used internally by zlib,
459 		 * but that will also close the file descriptor,
460 		 * which this function must not do.
461 		 */
462 		if ((fd = dup(fd)) == -1) {
463 			mandoc_msg(MANDOCERR_FILE, 0, 0,
464 			    "dup: %s", strerror(errno));
465 			return 0;
466 		}
467 		if ((gz = gzdopen(fd, "rb")) == NULL) {
468 			mandoc_msg(MANDOCERR_FILE, 0, 0,
469 			    "gzdopen: %s", strerror(errno));
470 			close(fd);
471 			return 0;
472 		}
473 	} else
474 		gz = NULL;
475 
476 	/*
477 	 * If this isn't a regular file (like, say, stdin), then we must
478 	 * go the old way and just read things in bit by bit.
479 	 */
480 
481 	*with_mmap = 0;
482 	off = 0;
483 	retval = 0;
484 	fb->sz = 0;
485 	fb->buf = NULL;
486 	for (;;) {
487 		if (off == fb->sz) {
488 			if (fb->sz == (1U << 31)) {
489 				mandoc_msg(MANDOCERR_TOOLARGE, 0, 0, NULL);
490 				break;
491 			}
492 			resize_buf(fb, 65536);
493 		}
494 		ssz = curp->gzip ?
495 		    gzread(gz, fb->buf + (int)off, fb->sz - off) :
496 		    read(fd, fb->buf + (int)off, fb->sz - off);
497 		if (ssz == 0) {
498 			fb->sz = off;
499 			retval = 1;
500 			break;
501 		}
502 		if (ssz == -1) {
503 			if (curp->gzip)
504 				(void)gzerror(gz, &gzerrnum);
505 			mandoc_msg(MANDOCERR_FILE, 0, 0, "read: %s",
506 			    curp->gzip && gzerrnum != Z_ERRNO ?
507 			    zError(gzerrnum) : strerror(errno));
508 			break;
509 		}
510 		off += (size_t)ssz;
511 	}
512 
513 	if (curp->gzip && (gzerrnum = gzclose(gz)) != Z_OK)
514 		mandoc_msg(MANDOCERR_FILE, 0, 0, "gzclose: %s",
515 		    gzerrnum == Z_ERRNO ? strerror(errno) :
516 		    zError(gzerrnum));
517 	if (retval == 0) {
518 		free(fb->buf);
519 		fb->buf = NULL;
520 	}
521 	return retval;
522 }
523 
524 static void
525 mparse_end(struct mparse *curp)
526 {
527 	if (curp->man->meta.macroset == MACROSET_NONE)
528 		curp->man->meta.macroset = MACROSET_MAN;
529 	if (curp->man->meta.macroset == MACROSET_MDOC)
530 		mdoc_endparse(curp->man);
531 	else
532 		man_endparse(curp->man);
533 	roff_endparse(curp->roff);
534 }
535 
536 /*
537  * Read the whole file into memory and call the parsers.
538  * Called recursively when an .so request is encountered.
539  */
540 void
541 mparse_readfd(struct mparse *curp, int fd, const char *filename)
542 {
543 	static int	 recursion_depth;
544 
545 	struct buf	 blk;
546 	struct buf	*save_primary;
547 	const char	*save_filename;
548 	size_t		 offset;
549 	int		 save_filenc, save_lineno;
550 	int		 with_mmap;
551 
552 	if (recursion_depth > 64) {
553 		mandoc_msg(MANDOCERR_ROFFLOOP, curp->line, 0, NULL);
554 		return;
555 	}
556 	if (read_whole_file(curp, fd, &blk, &with_mmap) == 0)
557 		return;
558 
559 	/*
560 	 * Save some properties of the parent file.
561 	 */
562 
563 	save_primary = curp->primary;
564 	save_filenc = curp->filenc;
565 	save_lineno = curp->line;
566 	save_filename = mandoc_msg_getinfilename();
567 
568 	curp->primary = &blk;
569 	curp->filenc = curp->options & (MPARSE_UTF8 | MPARSE_LATIN1);
570 	curp->line = 1;
571 	mandoc_msg_setinfilename(filename);
572 
573 	/* Skip an UTF-8 byte order mark. */
574 	if (curp->filenc & MPARSE_UTF8 && blk.sz > 2 &&
575 	    (unsigned char)blk.buf[0] == 0xef &&
576 	    (unsigned char)blk.buf[1] == 0xbb &&
577 	    (unsigned char)blk.buf[2] == 0xbf) {
578 		offset = 3;
579 		curp->filenc &= ~MPARSE_LATIN1;
580 	} else
581 		offset = 0;
582 
583 	recursion_depth++;
584 	mparse_buf_r(curp, blk, offset, 1);
585 	if (--recursion_depth == 0)
586 		mparse_end(curp);
587 
588 	/*
589 	 * Clean up and restore saved parent properties.
590 	 */
591 
592 	if (with_mmap)
593 		munmap(blk.buf, blk.sz);
594 	else
595 		free(blk.buf);
596 
597 	curp->primary = save_primary;
598 	curp->filenc = save_filenc;
599 	curp->line = save_lineno;
600 	if (save_filename != NULL)
601 		mandoc_msg_setinfilename(save_filename);
602 }
603 
604 int
605 mparse_open(struct mparse *curp, const char *file)
606 {
607 	char		 *cp;
608 	int		  fd, save_errno;
609 
610 	cp = strrchr(file, '.');
611 	curp->gzip = (cp != NULL && ! strcmp(cp + 1, "gz"));
612 
613 	/* First try to use the filename as it is. */
614 
615 	if ((fd = open(file, O_RDONLY)) != -1)
616 		return fd;
617 
618 	/*
619 	 * If that doesn't work and the filename doesn't
620 	 * already  end in .gz, try appending .gz.
621 	 */
622 
623 	if ( ! curp->gzip) {
624 		save_errno = errno;
625 		mandoc_asprintf(&cp, "%s.gz", file);
626 		fd = open(cp, O_RDONLY);
627 		free(cp);
628 		errno = save_errno;
629 		if (fd != -1) {
630 			curp->gzip = 1;
631 			return fd;
632 		}
633 	}
634 
635 	/* Neither worked, give up. */
636 
637 	return -1;
638 }
639 
640 struct mparse *
641 mparse_alloc(int options, enum mandoc_os os_e, const char *os_s)
642 {
643 	struct mparse	*curp;
644 
645 	curp = mandoc_calloc(1, sizeof(struct mparse));
646 
647 	curp->options = options;
648 	curp->os_s = os_s;
649 
650 	curp->roff = roff_alloc(options);
651 	curp->man = roff_man_alloc(curp->roff, curp->os_s,
652 		curp->options & MPARSE_QUICK ? 1 : 0);
653 	if (curp->options & MPARSE_MDOC) {
654 		curp->man->meta.macroset = MACROSET_MDOC;
655 		if (curp->man->mdocmac == NULL)
656 			curp->man->mdocmac = roffhash_alloc(MDOC_Dd, MDOC_MAX);
657 	} else if (curp->options & MPARSE_MAN) {
658 		curp->man->meta.macroset = MACROSET_MAN;
659 		if (curp->man->manmac == NULL)
660 			curp->man->manmac = roffhash_alloc(MAN_TH, MAN_MAX);
661 	}
662 	curp->man->meta.first->tok = TOKEN_NONE;
663 	curp->man->meta.os_e = os_e;
664 	return curp;
665 }
666 
667 void
668 mparse_reset(struct mparse *curp)
669 {
670 	roff_reset(curp->roff);
671 	roff_man_reset(curp->man);
672 	free_buf_list(curp->secondary);
673 	curp->secondary = NULL;
674 	curp->gzip = 0;
675 }
676 
677 void
678 mparse_free(struct mparse *curp)
679 {
680 	roffhash_free(curp->man->mdocmac);
681 	roffhash_free(curp->man->manmac);
682 	roff_man_free(curp->man);
683 	roff_free(curp->roff);
684 	free_buf_list(curp->secondary);
685 	free(curp);
686 }
687 
688 struct roff_meta *
689 mparse_result(struct mparse *curp)
690 {
691 	roff_state_reset(curp->man);
692 	if (curp->options & MPARSE_VALIDATE) {
693 		if (curp->man->meta.macroset == MACROSET_MDOC)
694 			mdoc_validate(curp->man);
695 		else
696 			man_validate(curp->man);
697 	}
698 	return &curp->man->meta;
699 }
700 
701 void
702 mparse_copy(const struct mparse *p)
703 {
704 	struct buf	*buf;
705 
706 	for (buf = p->secondary; buf != NULL; buf = buf->next)
707 		puts(buf->buf);
708 }
709