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Replace the Berkeley-DB based mandocdb(8) by an SQLite3-based version,
aiming for more flexible development and optimization options.
Kristaps started this during the summer 2012, i did some very heavy
bugfixing during t2k13 and finally, during the last few days,
got it to a state where it is ripe for in-tree development.
Beware, neither the user interfaces nor the database formats
are expected to be stable just yet.

Will not be installed or activated until further discussion.
No functional change to mandoc(1).

"As long as it remains off until we decide the cost, fine." deraadt@

/*	$Id: apropos.c,v 1.18 2013/12/31 00:40:19 schwarze Exp $ */
/*
 * Copyright (c) 2012 Kristaps Dzonsons <kristaps@bsd.lv>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include <sys/param.h>

#include <assert.h>
#include <getopt.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "manpath.h"
#include "mansearch.h"

int
apropos(int argc, char *argv[])
{
	int		 ch, whatis;
	struct mansearch search;
	size_t		 i, sz;
	struct manpage	*res;
	struct manpaths	 paths;
	char		*defpaths, *auxpaths;
	char		*conf_file;
	char		*progname;
	extern char	*optarg;
	extern int	 optind;

	progname = strrchr(argv[0], '/');
	if (progname == NULL)
		progname = argv[0];
	else
		++progname;

	whatis = (0 == strncmp(progname, "whatis", 6));

	memset(&paths, 0, sizeof(struct manpaths));
	memset(&search, 0, sizeof(struct mansearch));

	auxpaths = defpaths = NULL;
	conf_file = NULL;

	while (-1 != (ch = getopt(argc, argv, "C:M:m:S:s:")))
		switch (ch) {
		case ('C'):
			conf_file = optarg;
			break;
		case ('M'):
			defpaths = optarg;
			break;
		case ('m'):
			auxpaths = optarg;
			break;
		case ('S'):
			search.arch = optarg;
			break;
		case ('s'):
			search.sec = optarg;
			break;
		default:
			goto usage;
		}

	argc -= optind;
	argv += optind;

	if (0 == argc)
		goto usage;

	search.deftype = whatis ? TYPE_Nm : TYPE_Nm | TYPE_Nd;
	search.flags = whatis ? MANSEARCH_WHATIS : 0;

	manpath_parse(&paths, conf_file, defpaths, auxpaths);
	ch = mansearch(&search, &paths, argc, argv, &res, &sz);
	manpath_free(&paths);

	if (0 == ch)
		goto usage;

	for (i = 0; i < sz; i++) {
		printf("%s - %s\n", res[i].names, res[i].desc);
		free(res[i].file);
		free(res[i].names);
		free(res[i].desc);
	}

	free(res);
	return(sz ? EXIT_SUCCESS : EXIT_FAILURE);
usage:
	fprintf(stderr, "usage: %s [-C file] [-M path] [-m path] "
			"[-S arch] [-s section]%s ...\n", progname,
			whatis ? " name" : "\n               expression");
	return(EXIT_FAILURE);
}