1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2006 Dag-Erling Smørgrav
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
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
38 int
kld_isloaded(const char * name)39 kld_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
70 int
kld_load(const char * name)71 kld_load(const char *name)
72 {
73 if (kldload(name) == -1 && errno != EEXIST)
74 return (-1);
75 return (0);
76 }
77