kldunload.c revision 156087 
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#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sbin/kldunload/kldunload.c 156087 2006-02-27 21:55:47Z wkoszek $");
29
30#include <sys/param.h>
31#include <sys/linker.h>
32
33#include <err.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <unistd.h>
37
38static void
39usage(void)
40{
41	fprintf(stderr, "usage: kldunload [-fv] -i id\n");
42	fprintf(stderr, "       kldunload [-fv] [-n] name\n");
43	exit(1);
44}
45
46int
47main(int argc, char** argv)
48{
49	struct kld_file_stat stat;
50	int c;
51	int verbose = 0;
52	int fileid = 0;
53	int force = LINKER_UNLOAD_NORMAL;
54	char *filename = NULL;
55
56	while ((c = getopt(argc, argv, "fi:n:v")) != -1) {
57		switch (c) {
58		case 'f':
59			force = LINKER_UNLOAD_FORCE;
60			break;
61		case 'i':
62			fileid = atoi(optarg);
63			if (!fileid)
64				errx(1, "Invalid ID %s", optarg);
65			break;
66		case 'n':
67			filename = optarg;
68			break;
69		case 'v':
70			verbose = 1;
71			break;
72		default:
73			usage();
74		}
75	}
76
77	argc -= optind;
78	argv += optind;
79
80	if (fileid == 0 && filename == NULL && (argc == 1)) {
81		filename = *argv;
82		argc--;
83	}
84
85	if (argc != 0 || (fileid != 0 && filename != NULL))
86		usage();
87
88	if (fileid == 0 && filename == NULL)
89		usage();
90
91	if (filename != NULL) {
92		if ((fileid = kldfind(filename)) < 0)
93			err(1, "can't find file %s", filename);
94	}
95
96	if (verbose) {
97		stat.version = sizeof stat;
98		if (kldstat(fileid, &stat) < 0)
99			err(1, "can't stat file");
100		printf("Unloading %s, id=%d\n", stat.name, fileid);
101	}
102
103	if (kldunloadf(fileid, force) < 0)
104		err(1, "can't unload file");
105
106	return 0;
107}
108