/*      $NetBSD: whatis.c,v 1.10 2023/08/03 07:49:23 rin Exp $  */
/*-
* Copyright (c) 2012 Joerg Sonnenberger <[email protected]>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: whatis.c,v 1.10 2023/08/03 07:49:23 rin Exp $");

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "apropos-utils.h"

__dead static void
usage(void)
{
       fprintf(stderr, "%s [-C path] ...\n", "whatis");
       exit(EXIT_FAILURE);
}

static int
whatis(sqlite3 *db, const char *cmd)
{
       static const char sqlstr[] = "SELECT link AS name, section, name_desc"
               " FROM mandb_links WHERE link=?"
               " UNION"
               " SELECT name, section, name_desc"
               " FROM mandb WHERE name MATCH ? AND name=? COLLATE NOCASE"
               " ORDER BY section";
       sqlite3_stmt *stmt = NULL;
       int retval;
       int i;
       if (sqlite3_prepare_v2(db, sqlstr, -1, &stmt, NULL) != SQLITE_OK)
               errx(EXIT_FAILURE, "%s", sqlite3_errmsg(db));

       for (i = 0; i < 3; i++) {
               if (sqlite3_bind_text(stmt, i + 1, cmd, -1, NULL) != SQLITE_OK)
                       errx(EXIT_FAILURE, "%s", sqlite3_errmsg(db));
       }

       retval = 1;
       while (sqlite3_step(stmt) == SQLITE_ROW) {
               printf("%s(%s) - %s\n", sqlite3_column_text(stmt, 0),
                   sqlite3_column_text(stmt, 1),
                   sqlite3_column_text(stmt, 2));
               retval = 0;
       }
       sqlite3_finalize(stmt);
       if (retval)
               fprintf(stderr, "%s: not found\n", cmd);
       return retval;
}

int
main(int argc, char *argv[])
{
       sqlite3 *db;
       int ch, retval;
       const char *manconf = MANCONF;

       while ((ch = getopt(argc, argv, "C:")) != -1) {
               switch (ch) {
               case 'C':
                       manconf = optarg;
                       break;
               default:
                       usage();
               }
       }
       argc -= optind;
       argv += optind;

       if (argc == 0)
               usage();

       if ((db = init_db(MANDB_READONLY, manconf)) == NULL)
               exit(EXIT_FAILURE);

       retval = 0;
       while (argc--)
               retval |= whatis(db, *argv++);

       close_db(db);
       return retval;
}