kldunload.c revision 113936 
1/*-
2 * Copyright (c) 1997 Doug Rabson
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 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#ifndef lint
28static const char rcsid[] =
29  "$FreeBSD: head/sbin/kldunload/kldunload.c 113936 2003-04-23 20:33:57Z johan $";
30#endif /* not lint */
31
32#include <err.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <unistd.h>
36#include <sys/param.h>
37#include <sys/linker.h>
38
39static void
40usage(void)
41{
42    fprintf(stderr, "usage: kldunload [-v] -i id\n");
43    fprintf(stderr, "       kldunload [-v] [-n] name\n");
44    exit(1);
45}
46
47int
48main(int argc, char** argv)
49{
50    int c;
51    int verbose = 0;
52    int fileid = 0;
53    char* filename = NULL;
54
55    while ((c = getopt(argc, argv, "i:n:v")) != -1)
56	switch (c) {
57	case 'i':
58	    fileid = atoi(optarg);
59	    if (!fileid)
60		errx(1, "Invalid ID %s", optarg);
61	    break;
62	case 'n':
63	    filename = optarg;
64	    break;
65	case 'v':
66	    verbose = 1;
67	    break;
68	default:
69	    usage();
70	}
71    argc -= optind;
72    argv += optind;
73
74    if (fileid == 0 && filename == NULL && (argc == 1)) {
75	filename = *argv;
76	argc--;
77    }
78
79    if (argc != 0 || (fileid != 0 && filename != NULL))
80	usage();
81
82    if (fileid == 0 && filename == NULL)
83	usage();
84
85    if (filename != NULL) {
86	if ((fileid = kldfind(filename)) < 0)
87	    err(1, "can't find file %s", filename);
88    }
89
90    if (verbose) {
91	struct kld_file_stat stat;
92	stat.version = sizeof stat;
93	if (kldstat(fileid, &stat) < 0)
94	    err(1, "can't stat file");
95	printf("Unloading %s, id=%d\n", stat.name, fileid);
96    }
97
98    if (kldunload(fileid) < 0)
99	err(1, "can't unload file");
100
101    return 0;
102}
103