1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2006 Dag-Erling Co��dan Sm��rgrav
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer
12 *    in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31
32#include <sys/param.h>
33#include <sys/linker.h>
34#include <sys/module.h>
35
36#include <errno.h>
37#include <libutil.h>
38#include <string.h>
39
40int
41kld_isloaded(const char *name)
42{
43	struct kld_file_stat fstat;
44	struct module_stat mstat;
45	const char *ko;
46	int fid, mid;
47
48	for (fid = kldnext(0); fid > 0; fid = kldnext(fid)) {
49		fstat.version = sizeof(fstat);
50		if (kldstat(fid, &fstat) != 0)
51			continue;
52		/* check if the file name matches the supplied name */
53		if (strcmp(fstat.name, name) == 0)
54			return (1);
55		/* strip .ko and try again */
56		if ((ko = strstr(fstat.name, ".ko")) != NULL &&
57		    strlen(name) == (size_t)(ko - fstat.name) &&
58		    strncmp(fstat.name, name, ko - fstat.name) == 0)
59			return (1);
60		/* look for a matching module within the file */
61		for (mid = kldfirstmod(fid); mid > 0; mid = modfnext(mid)) {
62			mstat.version = sizeof(mstat);
63			if (modstat(mid, &mstat) != 0)
64				continue;
65			if (strcmp(mstat.name, name) == 0)
66				return (1);
67		}
68	}
69	return (0);
70}
71
72int
73kld_load(const char *name)
74{
75	if (kldload(name) == -1 && errno != EEXIST)
76		return (-1);
77	return (0);
78}
79