1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1997 Doug Rabson
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 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/param.h>
30#include <sys/linker.h>
31
32#include <err.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <sysexits.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(EX_USAGE);
44}
45
46#define OPT_NULL	0x00
47#define OPT_ID		0x01
48#define OPT_VERBOSE	0x02
49#define OPT_FORCE	0x04
50
51int
52main(int argc, char** argv)
53{
54	struct kld_file_stat stat;
55	int c, fileid, force, opt;
56	char *filename;
57
58	filename = NULL;
59	opt = OPT_NULL;
60
61	while ((c = getopt(argc, argv, "finv")) != -1) {
62		switch (c) {
63		case 'f':
64			opt |= OPT_FORCE;
65			break;
66		case 'i':
67			opt |= OPT_ID;
68			break;
69		case 'n':
70			/*
71			 * XXX: For backward compatibility. Currently does
72			 * nothing
73			 */
74			break;
75		case 'v':
76			opt |= OPT_VERBOSE;
77			break;
78		default:
79			usage();
80		}
81	}
82
83	argc -= optind;
84	argv += optind;
85
86	if (argc == 0)
87		usage();
88
89	while ((filename = *argv++) != NULL) {
90		if (opt & OPT_ID) {
91			fileid = atoi(filename);
92			if (fileid < 0)
93				errx(EXIT_FAILURE, "Invalid ID %s", optarg);
94		} else {
95			if ((fileid = kldfind(filename)) < 0)
96				errx(EXIT_FAILURE, "can't find file %s",
97				    filename);
98		}
99		if (opt & OPT_VERBOSE) {
100			stat.version = sizeof(stat);
101			if (kldstat(fileid, &stat) < 0)
102				err(EXIT_FAILURE, "can't stat file");
103			(void) printf("Unloading %s, id=%d\n", stat.name,
104			    fileid);
105		}
106		if (opt & OPT_FORCE)
107			force = LINKER_UNLOAD_FORCE;
108		else
109			force = LINKER_UNLOAD_NORMAL;
110
111		if (kldunloadf(fileid, force) < 0)
112			err(EXIT_FAILURE, "can't unload file");
113	}
114
115	return (EXIT_SUCCESS);
116}
117