xref: /dragonfly/sbin/kldunload/kldunload.c (revision 1de703da)
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  * $FreeBSD: src/sbin/kldunload/kldunload.c,v 1.10 1999/09/08 05:46:47 bde Exp $
27  * $DragonFly: src/sbin/kldunload/kldunload.c,v 1.2 2003/06/17 04:27:33 dillon Exp $
28  */
29 
30 #include <err.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <unistd.h>
34 #include <sys/param.h>
35 #include <sys/linker.h>
36 
37 static void
38 usage(void)
39 {
40     fprintf(stderr, "usage: kldunload [-v] -i id\n");
41     fprintf(stderr, "       kldunload [-v] [-n] name\n");
42     exit(1);
43 }
44 
45 int
46 main(int argc, char** argv)
47 {
48     int c;
49     int verbose = 0;
50     int fileid = 0;
51     char* filename = 0;
52 
53     while ((c = getopt(argc, argv, "i:n:v")) != -1)
54 	switch (c) {
55 	case 'i':
56 	    fileid = atoi(optarg);
57 	    if (!fileid)
58 		errx(1, "Invalid ID %s", optarg);
59 	    break;
60 	case 'n':
61 	    filename = optarg;
62 	    break;
63 	case 'v':
64 	    verbose = 1;
65 	    break;
66 	default:
67 	    usage();
68 	}
69     argc -= optind;
70     argv += optind;
71 
72     if (!fileid && !filename && (argc == 1)) {
73 	filename = *argv;
74 	argc--;
75     }
76 
77     if (argc != 0 || fileid && filename)
78 	usage();
79 
80     if (fileid == 0 && filename == 0)
81 	usage();
82 
83     if (filename) {
84 	if ((fileid = kldfind(filename)) < 0)
85 	    err(1, "can't find file %s", filename);
86     }
87 
88     if (verbose) {
89 	struct kld_file_stat stat;
90 	stat.version = sizeof stat;
91 	if (kldstat(fileid, &stat) < 0)
92 	    err(1, "can't stat file");
93 	printf("Unloading %s, id=%d\n", stat.name, fileid);
94     }
95 
96     if (kldunload(fileid) < 0)
97 	err(1, "can't unload file");
98 
99     return 0;
100 }
101