1/*-
2 * Copyright (c) 2006 Dag-Erling Coïdan Smørgrav
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer
10 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30#include <sys/param.h>
31#include <sys/linker.h>
32#include <sys/module.h>
33
34#include <errno.h>
35#include <libutil.h>
36#include <string.h>
37
38int
39kld_isloaded(const char *name)
40{
41	struct kld_file_stat fstat;
42	struct module_stat mstat;
43	const char *ko;
44	int fid, mid;
45
46	for (fid = kldnext(0); fid > 0; fid = kldnext(fid)) {
47		fstat.version = sizeof(fstat);
48		if (kldstat(fid, &fstat) != 0)
49			continue;
50		/* check if the file name matches the supplied name */
51		if (strcmp(fstat.name, name) == 0)
52			return (1);
53		/* strip .ko and try again */
54		if ((ko = strstr(fstat.name, ".ko")) != NULL &&
55		    strlen(name) == (size_t)(ko - fstat.name) &&
56		    strncmp(fstat.name, name, ko - fstat.name) == 0)
57			return (1);
58		/* look for a matching module within the file */
59		for (mid = kldfirstmod(fid); mid > 0; mid = modfnext(mid)) {
60			mstat.version = sizeof(mstat);
61			if (modstat(mid, &mstat) != 0)
62				continue;
63			if (strcmp(mstat.name, name) == 0)
64				return (1);
65		}
66	}
67	return (0);
68}
69
70int
71kld_load(const char *name)
72{
73	if (kldload(name) == -1 && errno != EEXIST)
74		return (-1);
75	return (0);
76}
77