1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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/cdefs.h>
30__FBSDID("$FreeBSD: stable/11/sbin/kldunload/kldunload.c 330449 2018-03-05 07:26:05Z eadler $");
31
32#include <sys/param.h>
33#include <sys/linker.h>
34
35#include <err.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <sysexits.h>
39#include <unistd.h>
40
41static void
42usage(void)
43{
44	fprintf(stderr, "usage: kldunload [-fv] -i id ...\n");
45	fprintf(stderr, "       kldunload [-fv] [-n] name ...\n");
46	exit(EX_USAGE);
47}
48
49#define OPT_NULL	0x00
50#define OPT_ID		0x01
51#define OPT_VERBOSE	0x02
52#define OPT_FORCE	0x04
53
54int
55main(int argc, char** argv)
56{
57	struct kld_file_stat stat;
58	int c, fileid, force, opt;
59	char *filename;
60
61	filename = NULL;
62	opt = OPT_NULL;
63
64	while ((c = getopt(argc, argv, "finv")) != -1) {
65		switch (c) {
66		case 'f':
67			opt |= OPT_FORCE;
68			break;
69		case 'i':
70			opt |= OPT_ID;
71			break;
72		case 'n':
73			/*
74			 * XXX: For backward compatibility. Currently does
75			 * nothing
76			 */
77			break;
78		case 'v':
79			opt |= OPT_VERBOSE;
80			break;
81		default:
82			usage();
83		}
84	}
85
86	argc -= optind;
87	argv += optind;
88
89	if (argc == 0)
90		usage();
91
92	while ((filename = *argv++) != NULL) {
93		if (opt & OPT_ID) {
94			fileid = atoi(filename);
95			if (fileid < 0)
96				errx(EXIT_FAILURE, "Invalid ID %s", optarg);
97		} else {
98			if ((fileid = kldfind(filename)) < 0)
99				errx(EXIT_FAILURE, "can't find file %s",
100				    filename);
101		}
102		if (opt & OPT_VERBOSE) {
103			stat.version = sizeof(stat);
104			if (kldstat(fileid, &stat) < 0)
105				err(EXIT_FAILURE, "can't stat file");
106			(void) printf("Unloading %s, id=%d\n", stat.name,
107			    fileid);
108		}
109		if (opt & OPT_FORCE)
110			force = LINKER_UNLOAD_FORCE;
111		else
112			force = LINKER_UNLOAD_NORMAL;
113
114		if (kldunloadf(fileid, force) < 0)
115			err(EXIT_FAILURE, "can't unload file");
116	}
117
118	return (EXIT_SUCCESS);
119}
120