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      1 /*	$NetBSD: whatis.c,v 1.10 2023/08/03 07:49:23 rin Exp $	*/
      2 /*-
      3  * Copyright (c) 2012 Joerg Sonnenberger <joerg (at) NetBSD.org>
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  *
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in
     14  *    the documentation and/or other materials provided with the
     15  *    distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     20  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
     21  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
     23  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     27  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  */
     30 
     31 #include <sys/cdefs.h>
     32 __RCSID("$NetBSD: whatis.c,v 1.10 2023/08/03 07:49:23 rin Exp $");
     33 
     34 #include <err.h>
     35 #include <stdio.h>
     36 #include <stdlib.h>
     37 #include <unistd.h>
     38 
     39 #include "apropos-utils.h"
     40 
     41 __dead static void
     42 usage(void)
     43 {
     44 	fprintf(stderr, "%s [-C path] ...\n", "whatis");
     45 	exit(EXIT_FAILURE);
     46 }
     47 
     48 static int
     49 whatis(sqlite3 *db, const char *cmd)
     50 {
     51 	static const char sqlstr[] = "SELECT link AS name, section, name_desc"
     52 		" FROM mandb_links WHERE link=?"
     53 		" UNION"
     54 		" SELECT name, section, name_desc"
     55 		" FROM mandb WHERE name MATCH ? AND name=? COLLATE NOCASE"
     56 		" ORDER BY section";
     57 	sqlite3_stmt *stmt = NULL;
     58 	int retval;
     59 	int i;
     60 	if (sqlite3_prepare_v2(db, sqlstr, -1, &stmt, NULL) != SQLITE_OK)
     61 		errx(EXIT_FAILURE, "%s", sqlite3_errmsg(db));
     62 
     63 	for (i = 0; i < 3; i++) {
     64 		if (sqlite3_bind_text(stmt, i + 1, cmd, -1, NULL) != SQLITE_OK)
     65 			errx(EXIT_FAILURE, "%s", sqlite3_errmsg(db));
     66 	}
     67 
     68 	retval = 1;
     69 	while (sqlite3_step(stmt) == SQLITE_ROW) {
     70 		printf("%s(%s) - %s\n", sqlite3_column_text(stmt, 0),
     71 		    sqlite3_column_text(stmt, 1),
     72 		    sqlite3_column_text(stmt, 2));
     73 		retval = 0;
     74 	}
     75 	sqlite3_finalize(stmt);
     76 	if (retval)
     77 		fprintf(stderr, "%s: not found\n", cmd);
     78 	return retval;
     79 }
     80 
     81 int
     82 main(int argc, char *argv[])
     83 {
     84 	sqlite3 *db;
     85 	int ch, retval;
     86 	const char *manconf = MANCONF;
     87 
     88 	while ((ch = getopt(argc, argv, "C:")) != -1) {
     89 		switch (ch) {
     90 		case 'C':
     91 			manconf = optarg;
     92 			break;
     93 		default:
     94 			usage();
     95 		}
     96 	}
     97 	argc -= optind;
     98 	argv += optind;
     99 
    100 	if (argc == 0)
    101 		usage();
    102 
    103 	if ((db = init_db(MANDB_READONLY, manconf)) == NULL)
    104 		exit(EXIT_FAILURE);
    105 
    106 	retval = 0;
    107 	while (argc--)
    108 		retval |= whatis(db, *argv++);
    109 
    110 	close_db(db);
    111 	return retval;
    112 }
    113