1/* $Id: main.c,v 1.358 2021/09/04 22:38:46 schwarze Exp $ */
2/*
3 * Copyright (c) 2010-2012, 2014-2021 Ingo Schwarze <schwarze@openbsd.org>
4 * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
5 * Copyright (c) 2010 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 * Main program for mandoc(1), man(1), apropos(1), whatis(1), and help(1).
20 */
21#include "config.h"
22
23#include <sys/types.h>
24#include <sys/ioctl.h>
25#include <sys/param.h>	/* MACHINE */
26#include <sys/stat.h>
27#include <sys/wait.h>
28
29#include <assert.h>
30#include <ctype.h>
31#if HAVE_ERR
32#include <err.h>
33#endif
34#include <errno.h>
35#include <fcntl.h>
36#include <glob.h>
37#include <limits.h>
38#if HAVE_SANDBOX_INIT
39#include <sandbox.h>
40#endif
41#include <signal.h>
42#include <stdio.h>
43#include <stdint.h>
44#include <stdlib.h>
45#include <string.h>
46#include <termios.h>
47#include <time.h>
48#include <unistd.h>
49
50#include "mandoc_aux.h"
51#include "mandoc.h"
52#include "mandoc_xr.h"
53#include "roff.h"
54#include "mdoc.h"
55#include "man.h"
56#include "mandoc_parse.h"
57#include "tag.h"
58#include "term_tag.h"
59#include "main.h"
60#include "manconf.h"
61#include "mansearch.h"
62
63enum	outmode {
64	OUTMODE_DEF = 0,
65	OUTMODE_FLN,
66	OUTMODE_LST,
67	OUTMODE_ALL,
68	OUTMODE_ONE
69};
70
71enum	outt {
72	OUTT_ASCII = 0,	/* -Tascii */
73	OUTT_LOCALE,	/* -Tlocale */
74	OUTT_UTF8,	/* -Tutf8 */
75	OUTT_TREE,	/* -Ttree */
76	OUTT_MAN,	/* -Tman */
77	OUTT_HTML,	/* -Thtml */
78	OUTT_MARKDOWN,	/* -Tmarkdown */
79	OUTT_LINT,	/* -Tlint */
80	OUTT_PS,	/* -Tps */
81	OUTT_PDF	/* -Tpdf */
82};
83
84struct	outstate {
85	struct tag_files *tag_files;	/* Tagging state variables. */
86	void		 *outdata;	/* data for output */
87	int		  use_pager;
88	int		  wstop;	/* stop after a file with a warning */
89	int		  had_output;	/* Some output was generated. */
90	enum outt	  outtype;	/* which output to use */
91};
92
93
94int			  mandocdb(int, char *[]);
95
96static	void		  check_xr(struct manpaths *);
97static	void		  fs_append(char **, size_t, int,
98				size_t, const char *, enum form,
99				struct manpage **, size_t *);
100static	int		  fs_lookup(const struct manpaths *, size_t,
101				const char *, const char *, const char *,
102				struct manpage **, size_t *);
103static	int		  fs_search(const struct mansearch *,
104				const struct manpaths *, const char *,
105				struct manpage **, size_t *);
106static	void		  glob_esc(char **, const char *, const char *);
107static	void		  outdata_alloc(struct outstate *, struct manoutput *);
108static	void		  parse(struct mparse *, int, const char *,
109				struct outstate *, struct manconf *);
110static	void		  passthrough(int, int);
111static	void		  process_onefile(struct mparse *, struct manpage *,
112				int, struct outstate *, struct manconf *);
113static	void		  run_pager(struct outstate *, char *);
114static	pid_t		  spawn_pager(struct outstate *, char *);
115static	void		  usage(enum argmode) __attribute__((__noreturn__));
116static	int		  woptions(char *, enum mandoc_os *, int *);
117
118static	const int sec_prios[] = {1, 4, 5, 8, 6, 3, 7, 2, 9};
119static	char		  help_arg[] = "help";
120static	char		 *help_argv[] = {help_arg, NULL};
121
122
123int
124main(int argc, char *argv[])
125{
126	struct manconf	 conf;		/* Manpaths and output options. */
127	struct outstate	 outst;		/* Output state. */
128	struct winsize	 ws;		/* Result of ioctl(TIOCGWINSZ). */
129	struct mansearch search;	/* Search options. */
130	struct manpage	*res;		/* Complete list of search results. */
131	struct manpage	*resn;		/* Search results for one name. */
132	struct mparse	*mp;		/* Opaque parser object. */
133	const char	*conf_file;	/* -C: alternate config file. */
134	const char	*os_s;		/* -I: Operating system for display. */
135	const char	*progname, *sec, *ep;
136	char		*defpaths;	/* -M: override manpaths. */
137	char		*auxpaths;	/* -m: additional manpaths. */
138	char		*oarg;		/* -O: output option string. */
139	char		*tagarg;	/* -O tag: default value. */
140	unsigned char	*uc;
141	size_t		 ressz;		/* Number of elements in res[]. */
142	size_t		 resnsz;	/* Number of elements in resn[]. */
143	size_t		 i, ib, ssz;
144	int		 options;	/* Parser options. */
145	int		 show_usage;	/* Invalid argument: give up. */
146	int		 prio, best_prio;
147	int		 startdir;
148	int		 c;
149	enum mandoc_os	 os_e;		/* Check base system conventions. */
150	enum outmode	 outmode;	/* According to command line. */
151
152#if HAVE_PROGNAME
153	progname = getprogname();
154#else
155	if (argc < 1)
156		progname = mandoc_strdup("mandoc");
157	else if ((progname = strrchr(argv[0], '/')) == NULL)
158		progname = argv[0];
159	else
160		++progname;
161	setprogname(progname);
162#endif
163
164	mandoc_msg_setoutfile(stderr);
165	if (strncmp(progname, "mandocdb", 8) == 0 ||
166	    strcmp(progname, BINM_MAKEWHATIS) == 0)
167		return mandocdb(argc, argv);
168
169#if HAVE_PLEDGE
170	if (pledge("stdio rpath wpath cpath tmppath tty proc exec", NULL) == -1) {
171		mandoc_msg(MANDOCERR_PLEDGE, 0, 0, "%s", strerror(errno));
172		return mandoc_msg_getrc();
173	}
174#endif
175#if HAVE_SANDBOX_INIT
176	if (sandbox_init(kSBXProfileNoInternet, SANDBOX_NAMED, NULL) == -1)
177		errx((int)MANDOCLEVEL_SYSERR, "sandbox_init");
178#endif
179
180	/* Search options. */
181
182	memset(&conf, 0, sizeof(conf));
183	conf_file = NULL;
184	defpaths = auxpaths = NULL;
185
186	memset(&search, 0, sizeof(struct mansearch));
187	search.outkey = "Nd";
188	oarg = NULL;
189
190	if (strcmp(progname, BINM_MAN) == 0)
191		search.argmode = ARG_NAME;
192	else if (strcmp(progname, BINM_APROPOS) == 0)
193		search.argmode = ARG_EXPR;
194	else if (strcmp(progname, BINM_WHATIS) == 0)
195		search.argmode = ARG_WORD;
196	else if (strncmp(progname, "help", 4) == 0)
197		search.argmode = ARG_NAME;
198	else
199		search.argmode = ARG_FILE;
200
201	/* Parser options. */
202
203	options = MPARSE_SO | MPARSE_UTF8 | MPARSE_LATIN1;
204	os_e = MANDOC_OS_OTHER;
205	os_s = NULL;
206
207	/* Formatter options. */
208
209	memset(&outst, 0, sizeof(outst));
210	outst.tag_files = NULL;
211	outst.outtype = OUTT_LOCALE;
212	outst.use_pager = 1;
213
214	show_usage = 0;
215	outmode = OUTMODE_DEF;
216
217	while ((c = getopt(argc, argv,
218	    "aC:cfhI:iK:klM:m:O:S:s:T:VW:w")) != -1) {
219		if (c == 'i' && search.argmode == ARG_EXPR) {
220			optind--;
221			break;
222		}
223		switch (c) {
224		case 'a':
225			outmode = OUTMODE_ALL;
226			break;
227		case 'C':
228			conf_file = optarg;
229			break;
230		case 'c':
231			outst.use_pager = 0;
232			break;
233		case 'f':
234			search.argmode = ARG_WORD;
235			break;
236		case 'h':
237			conf.output.synopsisonly = 1;
238			outst.use_pager = 0;
239			outmode = OUTMODE_ALL;
240			break;
241		case 'I':
242			if (strncmp(optarg, "os=", 3) != 0) {
243				mandoc_msg(MANDOCERR_BADARG_BAD, 0, 0,
244				    "-I %s", optarg);
245				return mandoc_msg_getrc();
246			}
247			if (os_s != NULL) {
248				mandoc_msg(MANDOCERR_BADARG_DUPE, 0, 0,
249				    "-I %s", optarg);
250				return mandoc_msg_getrc();
251			}
252			os_s = optarg + 3;
253			break;
254		case 'K':
255			options &= ~(MPARSE_UTF8 | MPARSE_LATIN1);
256			if (strcmp(optarg, "utf-8") == 0)
257				options |=  MPARSE_UTF8;
258			else if (strcmp(optarg, "iso-8859-1") == 0)
259				options |=  MPARSE_LATIN1;
260			else if (strcmp(optarg, "us-ascii") != 0) {
261				mandoc_msg(MANDOCERR_BADARG_BAD, 0, 0,
262				    "-K %s", optarg);
263				return mandoc_msg_getrc();
264			}
265			break;
266		case 'k':
267			search.argmode = ARG_EXPR;
268			break;
269		case 'l':
270			search.argmode = ARG_FILE;
271			outmode = OUTMODE_ALL;
272			break;
273		case 'M':
274#ifdef __FreeBSD__
275			defpaths = strdup(optarg);
276			if (defpaths == NULL)
277				err(1, "strdup");
278#else
279			defpaths = optarg;
280#endif
281			break;
282		case 'm':
283			auxpaths = optarg;
284			break;
285		case 'O':
286			oarg = optarg;
287			break;
288		case 'S':
289			search.arch = optarg;
290			break;
291		case 's':
292			search.sec = optarg;
293			break;
294		case 'T':
295			if (strcmp(optarg, "ascii") == 0)
296				outst.outtype = OUTT_ASCII;
297			else if (strcmp(optarg, "lint") == 0) {
298				outst.outtype = OUTT_LINT;
299				mandoc_msg_setoutfile(stdout);
300				mandoc_msg_setmin(MANDOCERR_BASE);
301			} else if (strcmp(optarg, "tree") == 0)
302				outst.outtype = OUTT_TREE;
303			else if (strcmp(optarg, "man") == 0)
304				outst.outtype = OUTT_MAN;
305			else if (strcmp(optarg, "html") == 0)
306				outst.outtype = OUTT_HTML;
307			else if (strcmp(optarg, "markdown") == 0)
308				outst.outtype = OUTT_MARKDOWN;
309			else if (strcmp(optarg, "utf8") == 0)
310				outst.outtype = OUTT_UTF8;
311			else if (strcmp(optarg, "locale") == 0)
312				outst.outtype = OUTT_LOCALE;
313			else if (strcmp(optarg, "ps") == 0)
314				outst.outtype = OUTT_PS;
315			else if (strcmp(optarg, "pdf") == 0)
316				outst.outtype = OUTT_PDF;
317			else {
318				mandoc_msg(MANDOCERR_BADARG_BAD, 0, 0,
319				    "-T %s", optarg);
320				return mandoc_msg_getrc();
321			}
322			break;
323		case 'W':
324			if (woptions(optarg, &os_e, &outst.wstop) == -1)
325				return mandoc_msg_getrc();
326			break;
327		case 'w':
328			outmode = OUTMODE_FLN;
329			break;
330		default:
331			show_usage = 1;
332			break;
333		}
334	}
335
336	if (show_usage)
337		usage(search.argmode);
338
339	/* Postprocess options. */
340
341	switch (outmode) {
342	case OUTMODE_DEF:
343		switch (search.argmode) {
344		case ARG_FILE:
345			outmode = OUTMODE_ALL;
346			outst.use_pager = 0;
347			break;
348		case ARG_NAME:
349			outmode = OUTMODE_ONE;
350			break;
351		default:
352			outmode = OUTMODE_LST;
353			break;
354		}
355		break;
356	case OUTMODE_FLN:
357		if (search.argmode == ARG_FILE)
358			outmode = OUTMODE_ALL;
359		break;
360	case OUTMODE_ALL:
361		break;
362	case OUTMODE_LST:
363	case OUTMODE_ONE:
364		abort();
365	}
366
367	if (oarg != NULL) {
368		if (outmode == OUTMODE_LST)
369			search.outkey = oarg;
370		else {
371			while (oarg != NULL) {
372				if (manconf_output(&conf.output,
373				    strsep(&oarg, ","), 0) == -1)
374					return mandoc_msg_getrc();
375			}
376		}
377	}
378
379	if (outst.outtype != OUTT_TREE || conf.output.noval == 0)
380		options |= MPARSE_VALIDATE;
381
382	if (outmode == OUTMODE_FLN ||
383	    outmode == OUTMODE_LST ||
384	    (conf.output.outfilename == NULL &&
385	     conf.output.tagfilename == NULL &&
386	     isatty(STDOUT_FILENO) == 0))
387		outst.use_pager = 0;
388
389	if (outst.use_pager &&
390	    (conf.output.width == 0 || conf.output.indent == 0) &&
391	    ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1 &&
392	    ws.ws_col > 1) {
393		if (conf.output.width == 0 && ws.ws_col < 79)
394			conf.output.width = ws.ws_col - 1;
395		if (conf.output.indent == 0 && ws.ws_col < 66)
396			conf.output.indent = 3;
397	}
398
399#if HAVE_PLEDGE
400	if (outst.use_pager == 0)
401		c = pledge("stdio rpath", NULL);
402	else if (conf.output.outfilename != NULL ||
403	    conf.output.tagfilename != NULL)
404		c = pledge("stdio rpath wpath cpath", NULL);
405	else
406		c = pledge("stdio rpath tmppath tty proc exec", NULL);
407	if (c == -1) {
408		mandoc_msg(MANDOCERR_PLEDGE, 0, 0, "%s", strerror(errno));
409		return mandoc_msg_getrc();
410	}
411#endif
412
413	/* Parse arguments. */
414
415	if (argc > 0) {
416		argc -= optind;
417		argv += optind;
418	}
419
420	/*
421	 * Quirks for help(1) and man(1),
422	 * in particular for a section argument without -s.
423	 */
424
425	if (search.argmode == ARG_NAME) {
426		if (*progname == 'h') {
427			if (argc == 0) {
428				argv = help_argv;
429				argc = 1;
430			}
431		} else if (argc > 1 &&
432		    ((uc = (unsigned char *)argv[0]) != NULL) &&
433		    ((isdigit(uc[0]) && (uc[1] == '\0' ||
434		      isalpha(uc[1]))) ||
435		     (uc[0] == 'n' && uc[1] == '\0'))) {
436			search.sec = (char *)uc;
437			argv++;
438			argc--;
439		}
440		if (search.arch == NULL)
441			search.arch = getenv("MACHINE");
442#ifdef MACHINE
443		if (search.arch == NULL)
444			search.arch = MACHINE;
445#endif
446		if (outmode == OUTMODE_ONE)
447			search.firstmatch = 1;
448	}
449
450	/*
451	 * Use the first argument for -O tag in addition to
452	 * using it as a search term for man(1) or apropos(1).
453	 */
454
455	if (conf.output.tag != NULL && *conf.output.tag == '\0') {
456		tagarg = argc > 0 && search.argmode == ARG_EXPR ?
457		    strchr(*argv, '=') : NULL;
458		conf.output.tag = tagarg == NULL ? *argv : tagarg + 1;
459	}
460
461	if (search.argmode != ARG_FILE ||
462	    mandoc_msg_getmin() == MANDOCERR_STYLE)
463#ifdef __FreeBSD__
464	{
465		/*
466		 * Use manpath(1) to populate defpaths if -M is not specified.
467		 * Don't treat any failures as fatal.
468		 */
469		if (defpaths == NULL) {
470			FILE *fp;
471			size_t linecap = 0;
472			ssize_t linelen;
473
474			if ((fp = popen("/usr/bin/manpath -q", "r")) != NULL) {
475				if ((linelen = getline(&defpaths,
476				    &linecap, fp)) > 0) {
477					/* Strip trailing newline */
478					defpaths[linelen - 1] = '\0';
479				}
480				pclose(fp);
481			}
482		}
483#endif
484	/* Read the configuration file. */
485		manconf_parse(&conf, conf_file, defpaths, auxpaths);
486#ifdef __FreeBSD__
487		free(defpaths);
488	}
489#endif
490
491	/* man(1): Resolve each name individually. */
492
493	if (search.argmode == ARG_NAME) {
494		if (argc < 1) {
495			if (outmode != OUTMODE_FLN)
496				usage(ARG_NAME);
497			if (conf.manpath.sz == 0) {
498				warnx("The manpath is empty.");
499				mandoc_msg_setrc(MANDOCLEVEL_BADARG);
500			} else {
501				for (i = 0; i + 1 < conf.manpath.sz; i++)
502					printf("%s:", conf.manpath.paths[i]);
503				printf("%s\n", conf.manpath.paths[i]);
504			}
505			manconf_free(&conf);
506			return (int)mandoc_msg_getrc();
507		}
508		for (res = NULL, ressz = 0; argc > 0; argc--, argv++) {
509			(void)mansearch(&search, &conf.manpath,
510			    1, argv, &resn, &resnsz);
511			if (resnsz == 0)
512				(void)fs_search(&search, &conf.manpath,
513				    *argv, &resn, &resnsz);
514			if (resnsz == 0 && strchr(*argv, '/') == NULL) {
515				if (search.arch != NULL &&
516				    arch_valid(search.arch, OSENUM) == 0)
517					warnx("Unknown architecture \"%s\".",
518					    search.arch);
519				else if (search.sec != NULL)
520					warnx("No entry for %s in "
521					    "section %s of the manual.",
522					    *argv, search.sec);
523				else
524					warnx("No entry for %s in "
525					    "the manual.", *argv);
526				mandoc_msg_setrc(MANDOCLEVEL_BADARG);
527				continue;
528			}
529			if (resnsz == 0) {
530				if (access(*argv, R_OK) == -1) {
531					mandoc_msg_setinfilename(*argv);
532					mandoc_msg(MANDOCERR_BADARG_BAD,
533					    0, 0, "%s", strerror(errno));
534					mandoc_msg_setinfilename(NULL);
535					continue;
536				}
537				resnsz = 1;
538				resn = mandoc_calloc(resnsz, sizeof(*res));
539				resn->file = mandoc_strdup(*argv);
540				resn->ipath = SIZE_MAX;
541				resn->form = FORM_SRC;
542			}
543			if (outmode != OUTMODE_ONE || resnsz == 1) {
544				res = mandoc_reallocarray(res,
545				    ressz + resnsz, sizeof(*res));
546				memcpy(res + ressz, resn,
547				    sizeof(*resn) * resnsz);
548				ressz += resnsz;
549				continue;
550			}
551
552			/* Search for the best section. */
553
554			best_prio = 40;
555			for (ib = i = 0; i < resnsz; i++) {
556				sec = resn[i].file;
557				sec += strcspn(sec, "123456789");
558				if (sec[0] == '\0')
559					continue; /* No section at all. */
560				prio = sec_prios[sec[0] - '1'];
561				if (search.sec != NULL) {
562					ssz = strlen(search.sec);
563					if (strncmp(sec, search.sec, ssz) == 0)
564						sec += ssz;
565				} else
566					sec++; /* Prefer without suffix. */
567				if (*sec != '/')
568					prio += 10; /* Wrong dir name. */
569				if (search.sec != NULL) {
570					ep = strchr(sec, '\0');
571					if (ep - sec > 3 &&
572					    strncmp(ep - 3, ".gz", 3) == 0)
573						ep -= 3;
574					if ((size_t)(ep - sec) < ssz + 3 ||
575					    strncmp(ep - ssz, search.sec,
576					     ssz) != 0)      /* Wrong file */
577						prio += 20;  /* extension. */
578				}
579				if (prio >= best_prio)
580					continue;
581				best_prio = prio;
582				ib = i;
583			}
584			res = mandoc_reallocarray(res, ressz + 1,
585			    sizeof(*res));
586			memcpy(res + ressz++, resn + ib, sizeof(*resn));
587		}
588
589	/* apropos(1), whatis(1): Process the full search expression. */
590
591	} else if (search.argmode != ARG_FILE) {
592		if (mansearch(&search, &conf.manpath,
593		    argc, argv, &res, &ressz) == 0)
594			usage(search.argmode);
595
596		if (ressz == 0) {
597			warnx("nothing appropriate");
598			mandoc_msg_setrc(MANDOCLEVEL_BADARG);
599			goto out;
600		}
601
602	/* mandoc(1): Take command line arguments as file names. */
603
604	} else {
605		ressz = argc > 0 ? argc : 1;
606		res = mandoc_calloc(ressz, sizeof(*res));
607		for (i = 0; i < ressz; i++) {
608			if (argc > 0)
609				res[i].file = mandoc_strdup(argv[i]);
610			res[i].ipath = SIZE_MAX;
611			res[i].form = FORM_SRC;
612		}
613	}
614
615	switch (outmode) {
616	case OUTMODE_FLN:
617		for (i = 0; i < ressz; i++)
618			puts(res[i].file);
619		goto out;
620	case OUTMODE_LST:
621		for (i = 0; i < ressz; i++)
622			printf("%s - %s\n", res[i].names,
623			    res[i].output == NULL ? "" :
624			    res[i].output);
625		goto out;
626	default:
627		break;
628	}
629
630	if (search.argmode == ARG_FILE && auxpaths != NULL) {
631		if (strcmp(auxpaths, "doc") == 0)
632			options |= MPARSE_MDOC;
633		else if (strcmp(auxpaths, "an") == 0)
634			options |= MPARSE_MAN;
635	}
636
637	mchars_alloc();
638	mp = mparse_alloc(options, os_e, os_s);
639
640	/*
641	 * Remember the original working directory, if possible.
642	 * This will be needed if some names on the command line
643	 * are page names and some are relative file names.
644	 * Do not error out if the current directory is not
645	 * readable: Maybe it won't be needed after all.
646	 */
647	startdir = open(".", O_RDONLY | O_DIRECTORY);
648	for (i = 0; i < ressz; i++) {
649		process_onefile(mp, res + i, startdir, &outst, &conf);
650		if (outst.wstop && mandoc_msg_getrc() != MANDOCLEVEL_OK)
651			break;
652	}
653	if (startdir != -1) {
654		(void)fchdir(startdir);
655		close(startdir);
656	}
657	if (conf.output.tag != NULL && conf.output.tag_found == 0) {
658		mandoc_msg(MANDOCERR_TAG, 0, 0, "%s", conf.output.tag);
659		conf.output.tag = NULL;
660	}
661	if (outst.outdata != NULL) {
662		switch (outst.outtype) {
663		case OUTT_HTML:
664			html_free(outst.outdata);
665			break;
666		case OUTT_UTF8:
667		case OUTT_LOCALE:
668		case OUTT_ASCII:
669			ascii_free(outst.outdata);
670			break;
671		case OUTT_PDF:
672		case OUTT_PS:
673			pspdf_free(outst.outdata);
674			break;
675		default:
676			break;
677		}
678	}
679	mandoc_xr_free();
680	mparse_free(mp);
681	mchars_free();
682
683out:
684	mansearch_free(res, ressz);
685	if (search.argmode != ARG_FILE)
686		manconf_free(&conf);
687
688	if (outst.tag_files != NULL) {
689		if (term_tag_close() != -1 &&
690		    conf.output.outfilename == NULL &&
691		    conf.output.tagfilename == NULL)
692			run_pager(&outst, conf.output.tag);
693		term_tag_unlink();
694	} else if (outst.had_output && outst.outtype != OUTT_LINT)
695		mandoc_msg_summary();
696
697	return (int)mandoc_msg_getrc();
698}
699
700static void
701usage(enum argmode argmode)
702{
703	switch (argmode) {
704	case ARG_FILE:
705		fputs("usage: mandoc [-ac] [-I os=name] "
706		    "[-K encoding] [-mdoc | -man] [-O options]\n"
707		    "\t      [-T output] [-W level] [file ...]\n", stderr);
708		break;
709	case ARG_NAME:
710		fputs("usage: man [-acfhklw] [-C file] [-M path] "
711		    "[-m path] [-S subsection]\n"
712		    "\t   [[-s] section] name ...\n", stderr);
713		break;
714	case ARG_WORD:
715		fputs("usage: whatis [-afk] [-C file] "
716		    "[-M path] [-m path] [-O outkey] [-S arch]\n"
717		    "\t      [-s section] name ...\n", stderr);
718		break;
719	case ARG_EXPR:
720		fputs("usage: apropos [-afk] [-C file] "
721		    "[-M path] [-m path] [-O outkey] [-S arch]\n"
722		    "\t       [-s section] expression ...\n", stderr);
723		break;
724	}
725	exit((int)MANDOCLEVEL_BADARG);
726}
727
728static void
729glob_esc(char **dst, const char *src, const char *suffix)
730{
731	while (*src != '\0') {
732		if (strchr("*?[", *src) != NULL)
733			*(*dst)++ = '\\';
734		*(*dst)++ = *src++;
735	}
736	while (*suffix != '\0')
737		*(*dst)++ = *suffix++;
738}
739
740static void
741fs_append(char **file, size_t filesz, int copy, size_t ipath,
742    const char *sec, enum form form, struct manpage **res, size_t *ressz)
743{
744	struct manpage	*page;
745
746	*res = mandoc_reallocarray(*res, *ressz + filesz, sizeof(**res));
747	page = *res + *ressz;
748	*ressz += filesz;
749	for (;;) {
750		page->file = copy ? mandoc_strdup(*file) : *file;
751		page->names = NULL;
752		page->output = NULL;
753		page->bits = NAME_FILE & NAME_MASK;
754		page->ipath = ipath;
755		page->sec = (*sec >= '1' && *sec <= '9') ? *sec - '1' + 1 : 10;
756		page->form = form;
757		if (--filesz == 0)
758			break;
759		file++;
760		page++;
761	}
762}
763
764static int
765fs_lookup(const struct manpaths *paths, size_t ipath,
766	const char *sec, const char *arch, const char *name,
767	struct manpage **res, size_t *ressz)
768{
769	struct stat	 sb;
770	glob_t		 globinfo;
771	char		*file, *cp, secnum[2];
772	int		 globres;
773	enum form	 form;
774
775	const char *const slman = "/man";
776	const char *const slash = "/";
777	const char *const sglob = ".[01-9]*";
778	const char *const dot   = ".";
779	const char *const aster = "*";
780
781	memset(&globinfo, 0, sizeof(globinfo));
782	form = FORM_SRC;
783
784	mandoc_asprintf(&file, "%s/man%s/%s.%s",
785	    paths->paths[ipath], sec, name, sec);
786	if (stat(file, &sb) != -1)
787		goto found;
788	free(file);
789
790	mandoc_asprintf(&file, "%s/cat%s/%s.0",
791	    paths->paths[ipath], sec, name);
792	if (stat(file, &sb) != -1) {
793		form = FORM_CAT;
794		goto found;
795	}
796	free(file);
797
798	if (arch != NULL) {
799		mandoc_asprintf(&file, "%s/man%s/%s/%s.%s",
800		    paths->paths[ipath], sec, arch, name, sec);
801		if (stat(file, &sb) != -1)
802			goto found;
803		free(file);
804	}
805
806	cp = file = mandoc_malloc(strlen(paths->paths[ipath]) * 2 +
807	    strlen(slman) + strlen(sec) * 2 + strlen(slash) +
808	    strlen(name) * 2 + strlen(sglob) + 1);
809	glob_esc(&cp, paths->paths[ipath], slman);
810	glob_esc(&cp, sec, slash);
811	glob_esc(&cp, name, sglob);
812	*cp = '\0';
813	globres = glob(file, 0, NULL, &globinfo);
814	if (globres != 0 && globres != GLOB_NOMATCH)
815		mandoc_msg(MANDOCERR_GLOB, 0, 0,
816		    "%s: %s", file, strerror(errno));
817	free(file);
818	file = NULL;
819	if (globres == 0)
820		goto found;
821	globfree(&globinfo);
822
823	if (sec[1] != '\0' && *ressz == 0) {
824		secnum[0] = sec[0];
825		secnum[1] = '\0';
826		cp = file = mandoc_malloc(strlen(paths->paths[ipath]) * 2 +
827		    strlen(slman) + strlen(secnum) * 2 + strlen(slash) +
828		    strlen(name) * 2 + strlen(dot) +
829		    strlen(sec) * 2 + strlen(aster) + 1);
830		glob_esc(&cp, paths->paths[ipath], slman);
831		glob_esc(&cp, secnum, slash);
832		glob_esc(&cp, name, dot);
833		glob_esc(&cp, sec, aster);
834		*cp = '\0';
835		globres = glob(file, 0, NULL, &globinfo);
836		if (globres != 0 && globres != GLOB_NOMATCH)
837			mandoc_msg(MANDOCERR_GLOB, 0, 0,
838			    "%s: %s", file, strerror(errno));
839		free(file);
840		file = NULL;
841		if (globres == 0)
842			goto found;
843		globfree(&globinfo);
844	}
845
846	if (res != NULL || ipath + 1 != paths->sz)
847		return -1;
848
849	mandoc_asprintf(&file, "%s.%s", name, sec);
850	globres = stat(file, &sb);
851	free(file);
852	return globres;
853
854found:
855	warnx("outdated mandoc.db lacks %s(%s) entry, run %s %s",
856	    name, sec, BINM_MAKEWHATIS, paths->paths[ipath]);
857	if (res == NULL)
858		free(file);
859	else if (file == NULL)
860		fs_append(globinfo.gl_pathv, globinfo.gl_pathc, 1,
861		    ipath, sec, form, res, ressz);
862	else
863		fs_append(&file, 1, 0, ipath, sec, form, res, ressz);
864	globfree(&globinfo);
865	return 0;
866}
867
868static int
869fs_search(const struct mansearch *cfg, const struct manpaths *paths,
870	const char *name, struct manpage **res, size_t *ressz)
871{
872	const char *const sections[] =
873	    {"1", "8", "6", "2", "3", "5", "7", "4", "9", "3p"};
874	const size_t nsec = sizeof(sections)/sizeof(sections[0]);
875
876	size_t		 ipath, isec;
877
878	assert(cfg->argmode == ARG_NAME);
879	if (res != NULL)
880		*res = NULL;
881	*ressz = 0;
882	for (ipath = 0; ipath < paths->sz; ipath++) {
883		if (cfg->sec != NULL) {
884			if (fs_lookup(paths, ipath, cfg->sec, cfg->arch,
885			    name, res, ressz) != -1 && cfg->firstmatch)
886				return 0;
887		} else {
888			for (isec = 0; isec < nsec; isec++)
889				if (fs_lookup(paths, ipath, sections[isec],
890				    cfg->arch, name, res, ressz) != -1 &&
891				    cfg->firstmatch)
892					return 0;
893		}
894	}
895	return -1;
896}
897
898static void
899process_onefile(struct mparse *mp, struct manpage *resp, int startdir,
900    struct outstate *outst, struct manconf *conf)
901{
902	int	 fd;
903
904	/*
905	 * Changing directories is not needed in ARG_FILE mode.
906	 * Do it on a best-effort basis.  Even in case of
907	 * failure, some functionality may still work.
908	 */
909	if (resp->ipath != SIZE_MAX)
910		(void)chdir(conf->manpath.paths[resp->ipath]);
911	else if (startdir != -1)
912		(void)fchdir(startdir);
913
914	mandoc_msg_setinfilename(resp->file);
915	if (resp->file != NULL) {
916		if ((fd = mparse_open(mp, resp->file)) == -1) {
917			mandoc_msg(resp->ipath == SIZE_MAX ?
918			    MANDOCERR_BADARG_BAD : MANDOCERR_OPEN,
919			    0, 0, "%s", strerror(errno));
920			mandoc_msg_setinfilename(NULL);
921			return;
922		}
923	} else
924		fd = STDIN_FILENO;
925
926	if (outst->use_pager) {
927		outst->use_pager = 0;
928		outst->tag_files = term_tag_init(conf->output.outfilename,
929		    outst->outtype == OUTT_HTML ? ".html" : "",
930		    conf->output.tagfilename);
931#if HAVE_PLEDGE
932		if ((conf->output.outfilename != NULL ||
933		     conf->output.tagfilename != NULL) &&
934		    pledge("stdio rpath cpath", NULL) == -1) {
935			mandoc_msg(MANDOCERR_PLEDGE, 0, 0,
936			    "%s", strerror(errno));
937			exit(mandoc_msg_getrc());
938		}
939#endif
940	}
941	if (outst->had_output && outst->outtype <= OUTT_UTF8) {
942		if (outst->outdata == NULL)
943			outdata_alloc(outst, &conf->output);
944		terminal_sepline(outst->outdata);
945	}
946
947	if (resp->form == FORM_SRC)
948		parse(mp, fd, resp->file, outst, conf);
949	else {
950		passthrough(fd, conf->output.synopsisonly);
951		outst->had_output = 1;
952	}
953
954	if (ferror(stdout)) {
955		if (outst->tag_files != NULL) {
956			mandoc_msg(MANDOCERR_WRITE, 0, 0, "%s: %s",
957			    outst->tag_files->ofn, strerror(errno));
958			term_tag_unlink();
959			outst->tag_files = NULL;
960		} else
961			mandoc_msg(MANDOCERR_WRITE, 0, 0, "%s",
962			    strerror(errno));
963	}
964	mandoc_msg_setinfilename(NULL);
965}
966
967static void
968parse(struct mparse *mp, int fd, const char *file,
969    struct outstate *outst, struct manconf *conf)
970{
971	static struct manpaths	 basepaths;
972	static int		 previous;
973	struct roff_meta	*meta;
974
975	assert(fd >= 0);
976	if (file == NULL)
977		file = "<stdin>";
978
979	if (previous)
980		mparse_reset(mp);
981	else
982		previous = 1;
983
984	mparse_readfd(mp, fd, file);
985	if (fd != STDIN_FILENO)
986		close(fd);
987
988	/*
989	 * With -Wstop and warnings or errors of at least the requested
990	 * level, do not produce output.
991	 */
992
993	if (outst->wstop && mandoc_msg_getrc() != MANDOCLEVEL_OK)
994		return;
995
996	if (outst->outdata == NULL)
997		outdata_alloc(outst, &conf->output);
998	else if (outst->outtype == OUTT_HTML)
999		html_reset(outst->outdata);
1000
1001	mandoc_xr_reset();
1002	meta = mparse_result(mp);
1003
1004	/* Execute the out device, if it exists. */
1005
1006	outst->had_output = 1;
1007	if (meta->macroset == MACROSET_MDOC) {
1008		switch (outst->outtype) {
1009		case OUTT_HTML:
1010			html_mdoc(outst->outdata, meta);
1011			break;
1012		case OUTT_TREE:
1013			tree_mdoc(outst->outdata, meta);
1014			break;
1015		case OUTT_MAN:
1016			man_mdoc(outst->outdata, meta);
1017			break;
1018		case OUTT_PDF:
1019		case OUTT_ASCII:
1020		case OUTT_UTF8:
1021		case OUTT_LOCALE:
1022		case OUTT_PS:
1023			terminal_mdoc(outst->outdata, meta);
1024			break;
1025		case OUTT_MARKDOWN:
1026			markdown_mdoc(outst->outdata, meta);
1027			break;
1028		default:
1029			break;
1030		}
1031	}
1032	if (meta->macroset == MACROSET_MAN) {
1033		switch (outst->outtype) {
1034		case OUTT_HTML:
1035			html_man(outst->outdata, meta);
1036			break;
1037		case OUTT_TREE:
1038			tree_man(outst->outdata, meta);
1039			break;
1040		case OUTT_MAN:
1041			mparse_copy(mp);
1042			break;
1043		case OUTT_PDF:
1044		case OUTT_ASCII:
1045		case OUTT_UTF8:
1046		case OUTT_LOCALE:
1047		case OUTT_PS:
1048			terminal_man(outst->outdata, meta);
1049			break;
1050		case OUTT_MARKDOWN:
1051			mandoc_msg(MANDOCERR_MAN_TMARKDOWN, 0, 0, NULL);
1052			break;
1053		default:
1054			break;
1055		}
1056	}
1057	if (conf->output.tag != NULL && conf->output.tag_found == 0 &&
1058	    tag_exists(conf->output.tag))
1059		conf->output.tag_found = 1;
1060
1061	if (mandoc_msg_getmin() < MANDOCERR_STYLE) {
1062		if (basepaths.sz == 0)
1063			manpath_base(&basepaths);
1064		check_xr(&basepaths);
1065	} else if (mandoc_msg_getmin() < MANDOCERR_WARNING)
1066		check_xr(&conf->manpath);
1067}
1068
1069static void
1070check_xr(struct manpaths *paths)
1071{
1072	struct mansearch	 search;
1073	struct mandoc_xr	*xr;
1074	size_t			 sz;
1075
1076	for (xr = mandoc_xr_get(); xr != NULL; xr = xr->next) {
1077		if (xr->line == -1)
1078			continue;
1079		search.arch = NULL;
1080		search.sec = xr->sec;
1081		search.outkey = NULL;
1082		search.argmode = ARG_NAME;
1083		search.firstmatch = 1;
1084		if (mansearch(&search, paths, 1, &xr->name, NULL, &sz))
1085			continue;
1086		if (fs_search(&search, paths, xr->name, NULL, &sz) != -1)
1087			continue;
1088		if (xr->count == 1)
1089			mandoc_msg(MANDOCERR_XR_BAD, xr->line,
1090			    xr->pos + 1, "Xr %s %s", xr->name, xr->sec);
1091		else
1092			mandoc_msg(MANDOCERR_XR_BAD, xr->line,
1093			    xr->pos + 1, "Xr %s %s (%d times)",
1094			    xr->name, xr->sec, xr->count);
1095	}
1096}
1097
1098static void
1099outdata_alloc(struct outstate *outst, struct manoutput *outconf)
1100{
1101	switch (outst->outtype) {
1102	case OUTT_HTML:
1103		outst->outdata = html_alloc(outconf);
1104		break;
1105	case OUTT_UTF8:
1106		outst->outdata = utf8_alloc(outconf);
1107		break;
1108	case OUTT_LOCALE:
1109		outst->outdata = locale_alloc(outconf);
1110		break;
1111	case OUTT_ASCII:
1112		outst->outdata = ascii_alloc(outconf);
1113		break;
1114	case OUTT_PDF:
1115		outst->outdata = pdf_alloc(outconf);
1116		break;
1117	case OUTT_PS:
1118		outst->outdata = ps_alloc(outconf);
1119		break;
1120	default:
1121		break;
1122	}
1123}
1124
1125static void
1126passthrough(int fd, int synopsis_only)
1127{
1128	const char	 synb[] = "S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS";
1129	const char	 synr[] = "SYNOPSIS";
1130
1131	FILE		*stream;
1132	char		*line, *cp;
1133	size_t		 linesz;
1134	ssize_t		 len, written;
1135	int		 lno, print;
1136
1137	stream = NULL;
1138	line = NULL;
1139	linesz = 0;
1140
1141	if (fflush(stdout) == EOF) {
1142		mandoc_msg(MANDOCERR_FFLUSH, 0, 0, "%s", strerror(errno));
1143		goto done;
1144	}
1145	if ((stream = fdopen(fd, "r")) == NULL) {
1146		close(fd);
1147		mandoc_msg(MANDOCERR_FDOPEN, 0, 0, "%s", strerror(errno));
1148		goto done;
1149	}
1150
1151	lno = print = 0;
1152	while ((len = getline(&line, &linesz, stream)) != -1) {
1153		lno++;
1154		cp = line;
1155		if (synopsis_only) {
1156			if (print) {
1157				if ( ! isspace((unsigned char)*cp))
1158					goto done;
1159				while (isspace((unsigned char)*cp)) {
1160					cp++;
1161					len--;
1162				}
1163			} else {
1164				if (strcmp(cp, synb) == 0 ||
1165				    strcmp(cp, synr) == 0)
1166					print = 1;
1167				continue;
1168			}
1169		}
1170		for (; len > 0; len -= written) {
1171			if ((written = write(STDOUT_FILENO, cp, len)) == -1) {
1172				mandoc_msg(MANDOCERR_WRITE, 0, 0,
1173				    "%s", strerror(errno));
1174				goto done;
1175			}
1176		}
1177	}
1178	if (ferror(stream))
1179		mandoc_msg(MANDOCERR_GETLINE, lno, 0, "%s", strerror(errno));
1180
1181done:
1182	free(line);
1183	if (stream != NULL)
1184		fclose(stream);
1185}
1186
1187static int
1188woptions(char *arg, enum mandoc_os *os_e, int *wstop)
1189{
1190	char		*v, *o;
1191	const char	*toks[11];
1192
1193	toks[0] = "stop";
1194	toks[1] = "all";
1195	toks[2] = "base";
1196	toks[3] = "style";
1197	toks[4] = "warning";
1198	toks[5] = "error";
1199	toks[6] = "unsupp";
1200	toks[7] = "fatal";
1201	toks[8] = "openbsd";
1202	toks[9] = "netbsd";
1203	toks[10] = NULL;
1204
1205	while (*arg) {
1206		o = arg;
1207		switch (getsubopt(&arg, (char * const *)toks, &v)) {
1208		case 0:
1209			*wstop = 1;
1210			break;
1211		case 1:
1212		case 2:
1213			mandoc_msg_setmin(MANDOCERR_BASE);
1214			break;
1215		case 3:
1216			mandoc_msg_setmin(MANDOCERR_STYLE);
1217			break;
1218		case 4:
1219			mandoc_msg_setmin(MANDOCERR_WARNING);
1220			break;
1221		case 5:
1222			mandoc_msg_setmin(MANDOCERR_ERROR);
1223			break;
1224		case 6:
1225			mandoc_msg_setmin(MANDOCERR_UNSUPP);
1226			break;
1227		case 7:
1228			mandoc_msg_setmin(MANDOCERR_BADARG);
1229			break;
1230		case 8:
1231			mandoc_msg_setmin(MANDOCERR_BASE);
1232			*os_e = MANDOC_OS_OPENBSD;
1233			break;
1234		case 9:
1235			mandoc_msg_setmin(MANDOCERR_BASE);
1236			*os_e = MANDOC_OS_NETBSD;
1237			break;
1238		default:
1239			mandoc_msg(MANDOCERR_BADARG_BAD, 0, 0, "-W %s", o);
1240			return -1;
1241		}
1242	}
1243	return 0;
1244}
1245
1246/*
1247 * Wait until moved to the foreground,
1248 * then fork the pager and wait for the user to close it.
1249 */
1250static void
1251run_pager(struct outstate *outst, char *tag_target)
1252{
1253	int	 signum, status;
1254	pid_t	 man_pgid, tc_pgid;
1255	pid_t	 pager_pid, wait_pid;
1256
1257	man_pgid = getpgid(0);
1258	outst->tag_files->tcpgid =
1259	    man_pgid == getpid() ? getpgid(getppid()) : man_pgid;
1260	pager_pid = 0;
1261	signum = SIGSTOP;
1262
1263	for (;;) {
1264		/* Stop here until moved to the foreground. */
1265
1266		tc_pgid = tcgetpgrp(STDOUT_FILENO);
1267		if (tc_pgid != man_pgid) {
1268			if (tc_pgid == pager_pid) {
1269				(void)tcsetpgrp(STDOUT_FILENO, man_pgid);
1270				if (signum == SIGTTIN)
1271					continue;
1272			} else
1273				outst->tag_files->tcpgid = tc_pgid;
1274			kill(0, signum);
1275			continue;
1276		}
1277
1278		/* Once in the foreground, activate the pager. */
1279
1280		if (pager_pid) {
1281			(void)tcsetpgrp(STDOUT_FILENO, pager_pid);
1282			kill(pager_pid, SIGCONT);
1283		} else
1284			pager_pid = spawn_pager(outst, tag_target);
1285
1286		/* Wait for the pager to stop or exit. */
1287
1288		while ((wait_pid = waitpid(pager_pid, &status,
1289		    WUNTRACED)) == -1 && errno == EINTR)
1290			continue;
1291
1292		if (wait_pid == -1) {
1293			mandoc_msg(MANDOCERR_WAIT, 0, 0,
1294			    "%s", strerror(errno));
1295			break;
1296		}
1297		if (!WIFSTOPPED(status))
1298			break;
1299
1300		signum = WSTOPSIG(status);
1301	}
1302}
1303
1304static pid_t
1305spawn_pager(struct outstate *outst, char *tag_target)
1306{
1307	const struct timespec timeout = { 0, 100000000 };  /* 0.1s */
1308#define MAX_PAGER_ARGS 16
1309	char		*argv[MAX_PAGER_ARGS];
1310	const char	*pager;
1311	char		*cp;
1312#if HAVE_LESS_T
1313	size_t		 cmdlen;
1314#endif
1315	int		 argc, use_ofn;
1316	pid_t		 pager_pid;
1317
1318	assert(outst->tag_files->ofd == -1);
1319	assert(outst->tag_files->tfs == NULL);
1320
1321	pager = getenv("MANPAGER");
1322	if (pager == NULL || *pager == '\0')
1323		pager = getenv("PAGER");
1324	if (pager == NULL || *pager == '\0')
1325		pager = BINM_PAGER;
1326	cp = mandoc_strdup(pager);
1327
1328	/*
1329	 * Parse the pager command into words.
1330	 * Intentionally do not do anything fancy here.
1331	 */
1332
1333	argc = 0;
1334	while (argc + 5 < MAX_PAGER_ARGS) {
1335		argv[argc++] = cp;
1336		cp = strchr(cp, ' ');
1337		if (cp == NULL)
1338			break;
1339		*cp++ = '\0';
1340		while (*cp == ' ')
1341			cp++;
1342		if (*cp == '\0')
1343			break;
1344	}
1345
1346	/* For less(1), use the tag file. */
1347
1348	use_ofn = 1;
1349#if HAVE_LESS_T
1350	if (*outst->tag_files->tfn != '\0' &&
1351	    (cmdlen = strlen(argv[0])) >= 4) {
1352		cp = argv[0] + cmdlen - 4;
1353		if (strcmp(cp, "less") == 0) {
1354			argv[argc++] = mandoc_strdup("-T");
1355			argv[argc++] = outst->tag_files->tfn;
1356			if (tag_target != NULL) {
1357				argv[argc++] = mandoc_strdup("-t");
1358				argv[argc++] = tag_target;
1359				use_ofn = 0;
1360			}
1361		}
1362	}
1363#endif
1364	if (use_ofn) {
1365		if (outst->outtype == OUTT_HTML && tag_target != NULL)
1366			mandoc_asprintf(&argv[argc], "file://%s#%s",
1367			    outst->tag_files->ofn, tag_target);
1368		else
1369			argv[argc] = outst->tag_files->ofn;
1370		argc++;
1371	}
1372	argv[argc] = NULL;
1373
1374	switch (pager_pid = fork()) {
1375	case -1:
1376		mandoc_msg(MANDOCERR_FORK, 0, 0, "%s", strerror(errno));
1377		exit(mandoc_msg_getrc());
1378	case 0:
1379		break;
1380	default:
1381		(void)setpgid(pager_pid, 0);
1382		(void)tcsetpgrp(STDOUT_FILENO, pager_pid);
1383#if HAVE_PLEDGE
1384		if (pledge("stdio rpath tmppath tty proc", NULL) == -1) {
1385			mandoc_msg(MANDOCERR_PLEDGE, 0, 0,
1386			    "%s", strerror(errno));
1387			exit(mandoc_msg_getrc());
1388		}
1389#endif
1390		outst->tag_files->pager_pid = pager_pid;
1391		return pager_pid;
1392	}
1393
1394	/*
1395	 * The child process becomes the pager.
1396	 * Do not start it before controlling the terminal.
1397	 */
1398
1399	while (tcgetpgrp(STDOUT_FILENO) != getpid())
1400		nanosleep(&timeout, NULL);
1401
1402	execvp(argv[0], argv);
1403	mandoc_msg(MANDOCERR_EXEC, 0, 0, "%s: %s", argv[0], strerror(errno));
1404	_exit(mandoc_msg_getrc());
1405}
1406