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/*
* Copyright (c) 1993 Terrence R. Lambert.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Terrence R. Lambert.
* 4. The name Terrence R. Lambert may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <stdio.h>
#include <stdlib.h>
#include <err.h>
#include <string.h>
#include <a.out.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/mount.h>
#include <sys/lkm.h>
#include <sys/file.h>
#include <sys/errno.h>
#include "pathnames.h"
void
usage()
{
fprintf(stderr, "usage: modunload [-i <module id>] [-n <module name>]\n");
exit(1);
}
int devfd;
void
cleanup()
{
close(devfd);
}
int
main(argc, argv)
int argc;
char *argv[];
{
int c;
int modnum = -1;
char *modname = NULL;
struct lmc_unload ulbuf;
while ((c = getopt(argc, argv, "i:n:")) != EOF) {
switch (c) {
case 'i':
modnum = atoi(optarg);
break; /* number */
case 'n':
modname = optarg;
break; /* name */
case '?':
usage();
default:
printf("default!\n");
break;
}
}
argc -= optind;
argv += optind;
if (argc != 0 || (modnum == -1 && modname == NULL))
usage();
/*
* Open the virtual device device driver for exclusive use (needed
* to ioctl() to retrive the loaded module(s) status).
*/
if ((devfd = open(_PATH_LKM, O_RDWR, 0)) == -1)
err(2, _PATH_LKM);
atexit(cleanup);
/*
* Unload the requested module.
*/
ulbuf.name = modname;
ulbuf.id = modnum;
if (ioctl(devfd, LMUNLOAD, &ulbuf) == -1) {
switch (errno) {
case EINVAL: /* out of range */
errx(3, "id out of range");
case ENOENT: /* no such entry */
errx(3, "no such module");
default: /* other error (EFAULT, etc) */
err(5, "LMUNLOAD");
}
}
return 0;
}
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