whatis.c revision 1.9 
1/*	$NetBSD: whatis.c,v 1.9 2019/05/18 10:28:57 leot Exp $	*/
2/*-
3 * Copyright (c) 2012 Joerg Sonnenberger <joerg@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 1.9 2019/05/18 10:28:57 leot 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
42usage(void)
43{
44	fprintf(stderr, "%s [-C path] ...\n", "whatis");
45	exit(EXIT_FAILURE);
46}
47
48static int
49whatis(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
81int
82main(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