xref: /illumos-gate/usr/src/cmd/mandoc/read.c (revision b1e2e3fb17324e9ddf43db264a0c64da7756d9e6) 
1 /*	$Id: read.c,v 1.213 2019/06/03 19:58:02 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 			ln.buf[pos++] = '\n';
259 			ln.buf[pos] = '\0';
260 		}
261 
262 		/*
263 		 * A significant amount of complexity is contained by
264 		 * the roff preprocessor.  It's line-oriented but can be
265 		 * expressed on one line, so we need at times to
266 		 * readjust our starting point and re-run it.  The roff
267 		 * preprocessor can also readjust the buffers with new
268 		 * data, so we pass them in wholesale.
269 		 */
270 
271 		of = 0;
272 rerun:
273 		line_result = roff_parseln(curp->roff, curp->line, &ln, &of);
274 
275 		/* Process options. */
276 
277 		if (line_result & ROFF_APPEND)
278 			assert(line_result == (ROFF_IGN | ROFF_APPEND));
279 
280 		if (line_result & ROFF_USERCALL)
281 			assert((line_result & ROFF_MASK) == ROFF_REPARSE);
282 
283 		if (line_result & ROFF_USERRET) {
284 			assert(line_result == (ROFF_IGN | ROFF_USERRET));
285 			if (start == 0) {
286 				/* Return from the current macro. */
287 				result = ROFF_USERRET;
288 				goto out;
289 			}
290 		}
291 
292 		switch (line_result & ROFF_LOOPMASK) {
293 		case ROFF_IGN:
294 			break;
295 		case ROFF_WHILE:
296 			if (curp->loop != NULL) {
297 				if (loop == curp->loop)
298 					break;
299 				mandoc_msg(MANDOCERR_WHILE_NEST,
300 				    curp->line, pos, NULL);
301 			}
302 			curp->loop = thisln;
303 			loop = NULL;
304 			inloop = 1;
305 			break;
306 		case ROFF_LOOPCONT:
307 		case ROFF_LOOPEXIT:
308 			if (curp->loop == NULL) {
309 				mandoc_msg(MANDOCERR_WHILE_FAIL,
310 				    curp->line, pos, NULL);
311 				break;
312 			}
313 			if (inloop == 0) {
314 				mandoc_msg(MANDOCERR_WHILE_INTO,
315 				    curp->line, pos, NULL);
316 				curp->loop = loop = NULL;
317 				break;
318 			}
319 			if (line_result & ROFF_LOOPCONT)
320 				loop = curp->loop;
321 			else {
322 				curp->loop = loop = NULL;
323 				inloop = 0;
324 			}
325 			break;
326 		default:
327 			abort();
328 		}
329 
330 		/* Process the main instruction from the roff parser. */
331 
332 		switch (line_result & ROFF_MASK) {
333 		case ROFF_IGN:
334 			break;
335 		case ROFF_CONT:
336 			if (curp->man->meta.macroset == MACROSET_NONE)
337 				choose_parser(curp);
338 			if ((curp->man->meta.macroset == MACROSET_MDOC ?
339 			     mdoc_parseln(curp->man, curp->line, ln.buf, of) :
340 			     man_parseln(curp->man, curp->line, ln.buf, of)
341 			    ) == 2)
342 				goto out;
343 			break;
344 		case ROFF_RERUN:
345 			goto rerun;
346 		case ROFF_REPARSE:
347 			if (++curp->reparse_count > REPARSE_LIMIT) {
348 				/* Abort and return to the top level. */
349 				result = ROFF_IGN;
350 				mandoc_msg(MANDOCERR_ROFFLOOP,
351 				    curp->line, pos, NULL);
352 				goto out;
353 			}
354 			result = mparse_buf_r(curp, ln, of, 0);
355 			if (line_result & ROFF_USERCALL) {
356 				roff_userret(curp->roff);
357 				/* Continue normally. */
358 				if (result & ROFF_USERRET)
359 					result = ROFF_CONT;
360 			}
361 			if (start == 0 && result != ROFF_CONT)
362 				goto out;
363 			break;
364 		case ROFF_SO:
365 			if ( ! (curp->options & MPARSE_SO) &&
366 			    (i >= blk.sz || blk.buf[i] == '\0')) {
367 				curp->man->meta.sodest =
368 				    mandoc_strdup(ln.buf + of);
369 				goto out;
370 			}
371 			if ((fd = mparse_open(curp, ln.buf + of)) != -1) {
372 				mparse_readfd(curp, fd, ln.buf + of);
373 				close(fd);
374 			} else {
375 				mandoc_msg(MANDOCERR_SO_FAIL,
376 				    curp->line, of, ".so %s: %s",
377 				    ln.buf + of, strerror(errno));
378 				ln.sz = mandoc_asprintf(&cp,
379 				    ".sp\nSee the file %s.\n.sp",
380 				    ln.buf + of);
381 				free(ln.buf);
382 				ln.buf = cp;
383 				of = 0;
384 				mparse_buf_r(curp, ln, of, 0);
385 			}
386 			break;
387 		default:
388 			abort();
389 		}
390 
391 		/* Start the next input line. */
392 
393 		if (loop != NULL &&
394 		    (line_result & ROFF_LOOPMASK) == ROFF_IGN)
395 			loop = loop->next;
396 
397 		if (loop != NULL) {
398 			if ((line_result & ROFF_APPEND) == 0)
399 				*ln.buf = '\0';
400 			if (ln.sz < loop->sz)
401 				resize_buf(&ln, loop->sz);
402 			(void)strlcat(ln.buf, loop->buf, ln.sz);
403 			of = 0;
404 			goto rerun;
405 		}
406 
407 		pos = (line_result & ROFF_APPEND) ? strlen(ln.buf) : 0;
408 	}
409 out:
410 	if (inloop) {
411 		if (result != ROFF_USERRET)
412 			mandoc_msg(MANDOCERR_WHILE_OUTOF,
413 			    curp->line, pos, NULL);
414 		curp->loop = NULL;
415 	}
416 	free(ln.buf);
417 	if (firstln != curp->secondary)
418 		free_buf_list(firstln);
419 	return result;
420 }
421 
422 static int
423 read_whole_file(struct mparse *curp, int fd, struct buf *fb, int *with_mmap)
424 {
425 	struct stat	 st;
426 	gzFile		 gz;
427 	size_t		 off;
428 	ssize_t		 ssz;
429 	int		 gzerrnum, retval;
430 
431 	if (fstat(fd, &st) == -1) {
432 		mandoc_msg(MANDOCERR_FILE, 0, 0,
433 		    "fstat: %s", strerror(errno));
434 		return 0;
435 	}
436 
437 	/*
438 	 * If we're a regular file, try just reading in the whole entry
439 	 * via mmap().  This is faster than reading it into blocks, and
440 	 * since each file is only a few bytes to begin with, I'm not
441 	 * concerned that this is going to tank any machines.
442 	 */
443 
444 	if (curp->gzip == 0 && S_ISREG(st.st_mode)) {
445 		if (st.st_size > 0x7fffffff) {
446 			mandoc_msg(MANDOCERR_TOOLARGE, 0, 0, NULL);
447 			return 0;
448 		}
449 		*with_mmap = 1;
450 		fb->sz = (size_t)st.st_size;
451 		fb->buf = mmap(NULL, fb->sz, PROT_READ, MAP_SHARED, fd, 0);
452 		if (fb->buf != MAP_FAILED)
453 			return 1;
454 	}
455 
456 	if (curp->gzip) {
457 		/*
458 		 * Duplicating the file descriptor is required
459 		 * because we will have to call gzclose(3)
460 		 * to free memory used internally by zlib,
461 		 * but that will also close the file descriptor,
462 		 * which this function must not do.
463 		 */
464 		if ((fd = dup(fd)) == -1) {
465 			mandoc_msg(MANDOCERR_FILE, 0, 0,
466 			    "dup: %s", strerror(errno));
467 			return 0;
468 		}
469 		if ((gz = gzdopen(fd, "rb")) == NULL) {
470 			mandoc_msg(MANDOCERR_FILE, 0, 0,
471 			    "gzdopen: %s", strerror(errno));
472 			close(fd);
473 			return 0;
474 		}
475 	} else
476 		gz = NULL;
477 
478 	/*
479 	 * If this isn't a regular file (like, say, stdin), then we must
480 	 * go the old way and just read things in bit by bit.
481 	 */
482 
483 	*with_mmap = 0;
484 	off = 0;
485 	retval = 0;
486 	fb->sz = 0;
487 	fb->buf = NULL;
488 	for (;;) {
489 		if (off == fb->sz) {
490 			if (fb->sz == (1U << 31)) {
491 				mandoc_msg(MANDOCERR_TOOLARGE, 0, 0, NULL);
492 				break;
493 			}
494 			resize_buf(fb, 65536);
495 		}
496 		ssz = curp->gzip ?
497 		    gzread(gz, fb->buf + (int)off, fb->sz - off) :
498 		    read(fd, fb->buf + (int)off, fb->sz - off);
499 		if (ssz == 0) {
500 			fb->sz = off;
501 			retval = 1;
502 			break;
503 		}
504 		if (ssz == -1) {
505 			if (curp->gzip)
506 				(void)gzerror(gz, &gzerrnum);
507 			mandoc_msg(MANDOCERR_FILE, 0, 0, "read: %s",
508 			    curp->gzip && gzerrnum != Z_ERRNO ?
509 			    zError(gzerrnum) : strerror(errno));
510 			break;
511 		}
512 		off += (size_t)ssz;
513 	}
514 
515 	if (curp->gzip && (gzerrnum = gzclose(gz)) != Z_OK)
516 		mandoc_msg(MANDOCERR_FILE, 0, 0, "gzclose: %s",
517 		    gzerrnum == Z_ERRNO ? strerror(errno) :
518 		    zError(gzerrnum));
519 	if (retval == 0) {
520 		free(fb->buf);
521 		fb->buf = NULL;
522 	}
523 	return retval;
524 }
525 
526 static void
527 mparse_end(struct mparse *curp)
528 {
529 	if (curp->man->meta.macroset == MACROSET_NONE)
530 		curp->man->meta.macroset = MACROSET_MAN;
531 	if (curp->man->meta.macroset == MACROSET_MDOC)
532 		mdoc_endparse(curp->man);
533 	else
534 		man_endparse(curp->man);
535 	roff_endparse(curp->roff);
536 }
537 
538 /*
539  * Read the whole file into memory and call the parsers.
540  * Called recursively when an .so request is encountered.
541  */
542 void
543 mparse_readfd(struct mparse *curp, int fd, const char *filename)
544 {
545 	static int	 recursion_depth;
546 
547 	struct buf	 blk;
548 	struct buf	*save_primary;
549 	const char	*save_filename;
550 	size_t		 offset;
551 	int		 save_filenc, save_lineno;
552 	int		 with_mmap;
553 
554 	if (recursion_depth > 64) {
555 		mandoc_msg(MANDOCERR_ROFFLOOP, curp->line, 0, NULL);
556 		return;
557 	}
558 	if (read_whole_file(curp, fd, &blk, &with_mmap) == 0)
559 		return;
560 
561 	/*
562 	 * Save some properties of the parent file.
563 	 */
564 
565 	save_primary = curp->primary;
566 	save_filenc = curp->filenc;
567 	save_lineno = curp->line;
568 	save_filename = mandoc_msg_getinfilename();
569 
570 	curp->primary = &blk;
571 	curp->filenc = curp->options & (MPARSE_UTF8 | MPARSE_LATIN1);
572 	curp->line = 1;
573 	mandoc_msg_setinfilename(filename);
574 
575 	/* Skip an UTF-8 byte order mark. */
576 	if (curp->filenc & MPARSE_UTF8 && blk.sz > 2 &&
577 	    (unsigned char)blk.buf[0] == 0xef &&
578 	    (unsigned char)blk.buf[1] == 0xbb &&
579 	    (unsigned char)blk.buf[2] == 0xbf) {
580 		offset = 3;
581 		curp->filenc &= ~MPARSE_LATIN1;
582 	} else
583 		offset = 0;
584 
585 	recursion_depth++;
586 	mparse_buf_r(curp, blk, offset, 1);
587 	if (--recursion_depth == 0)
588 		mparse_end(curp);
589 
590 	/*
591 	 * Clean up and restore saved parent properties.
592 	 */
593 
594 	if (with_mmap)
595 		munmap(blk.buf, blk.sz);
596 	else
597 		free(blk.buf);
598 
599 	curp->primary = save_primary;
600 	curp->filenc = save_filenc;
601 	curp->line = save_lineno;
602 	if (save_filename != NULL)
603 		mandoc_msg_setinfilename(save_filename);
604 }
605 
606 int
607 mparse_open(struct mparse *curp, const char *file)
608 {
609 	char		 *cp;
610 	int		  fd, save_errno;
611 
612 	cp = strrchr(file, '.');
613 	curp->gzip = (cp != NULL && ! strcmp(cp + 1, "gz"));
614 
615 	/* First try to use the filename as it is. */
616 
617 	if ((fd = open(file, O_RDONLY)) != -1)
618 		return fd;
619 
620 	/*
621 	 * If that doesn't work and the filename doesn't
622 	 * already  end in .gz, try appending .gz.
623 	 */
624 
625 	if ( ! curp->gzip) {
626 		save_errno = errno;
627 		mandoc_asprintf(&cp, "%s.gz", file);
628 		fd = open(cp, O_RDONLY);
629 		free(cp);
630 		errno = save_errno;
631 		if (fd != -1) {
632 			curp->gzip = 1;
633 			return fd;
634 		}
635 	}
636 
637 	/* Neither worked, give up. */
638 
639 	return -1;
640 }
641 
642 struct mparse *
643 mparse_alloc(int options, enum mandoc_os os_e, const char *os_s)
644 {
645 	struct mparse	*curp;
646 
647 	curp = mandoc_calloc(1, sizeof(struct mparse));
648 
649 	curp->options = options;
650 	curp->os_s = os_s;
651 
652 	curp->roff = roff_alloc(options);
653 	curp->man = roff_man_alloc(curp->roff, curp->os_s,
654 		curp->options & MPARSE_QUICK ? 1 : 0);
655 	if (curp->options & MPARSE_MDOC) {
656 		curp->man->meta.macroset = MACROSET_MDOC;
657 		if (curp->man->mdocmac == NULL)
658 			curp->man->mdocmac = roffhash_alloc(MDOC_Dd, MDOC_MAX);
659 	} else if (curp->options & MPARSE_MAN) {
660 		curp->man->meta.macroset = MACROSET_MAN;
661 		if (curp->man->manmac == NULL)
662 			curp->man->manmac = roffhash_alloc(MAN_TH, MAN_MAX);
663 	}
664 	curp->man->meta.first->tok = TOKEN_NONE;
665 	curp->man->meta.os_e = os_e;
666 	return curp;
667 }
668 
669 void
670 mparse_reset(struct mparse *curp)
671 {
672 	roff_reset(curp->roff);
673 	roff_man_reset(curp->man);
674 	free_buf_list(curp->secondary);
675 	curp->secondary = NULL;
676 	curp->gzip = 0;
677 }
678 
679 void
680 mparse_free(struct mparse *curp)
681 {
682 	roffhash_free(curp->man->mdocmac);
683 	roffhash_free(curp->man->manmac);
684 	roff_man_free(curp->man);
685 	roff_free(curp->roff);
686 	free_buf_list(curp->secondary);
687 	free(curp);
688 }
689 
690 struct roff_meta *
691 mparse_result(struct mparse *curp)
692 {
693 	roff_state_reset(curp->man);
694 	if (curp->options & MPARSE_VALIDATE) {
695 		if (curp->man->meta.macroset == MACROSET_MDOC)
696 			mdoc_validate(curp->man);
697 		else
698 			man_validate(curp->man);
699 	}
700 	return &curp->man->meta;
701 }
702 
703 void
704 mparse_copy(const struct mparse *p)
705 {
706 	struct buf	*buf;
707 
708 	for (buf = p->secondary; buf != NULL; buf = buf->next)
709 		puts(buf->buf);
710 }
711