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Flip apropos to use mansearch instead of apropos_db.
This makes the utility much smaller and simpler.
A lot of functionality has been omitted while the sqlite3 search routines
improve (logical operations, etc.).
It still needs work to make the output more conventional.
Also add the manpage utility, which I use extensively as a mind-meld of
apropos and man.

/*	$Id: apropos.c,v 1.31 2012/06/08 10:44:52 kristaps 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.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/param.h>

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

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

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

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

	auxpaths = defpaths = conf_file = arch = sec = NULL;
	memset(&paths, 0, sizeof(struct manpaths));

	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'):
			arch = optarg;
			break;
		case ('s'):
			sec = optarg;
			break;
		default:
			goto usage;
		}

	argc -= optind;
	argv += optind;

	if (0 == argc)
		goto usage;

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

	if (0 == ch)
		goto usage;

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

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