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/* $OpenBSD: modunload.c,v 1.14 2003/09/19 17:36:03 deraadt Exp $ */
/* $NetBSD: modunload.c,v 1.9 1995/05/28 05:23:05 jtc Exp $ */
/*
* 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.
*/
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/mount.h>
#include <sys/lkm.h>
#include <a.out.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"
static void
usage(void)
{
extern char *__progname;
(void)fprintf(stderr, "usage: %s [-i id] [-n name] [-p postunload]\n",
__progname);
exit(1);
}
int
main(int argc, char *argv[])
{
int c, devfd;
long modnum = -1;
char *modname = NULL;
char *endptr, *post = NULL;
struct lmc_unload ulbuf;
while ((c = getopt(argc, argv, "i:n:p:")) != -1) {
switch (c) {
case 'i':
modnum = strtol(optarg, &endptr, 0);
if (modnum < 0 || modnum > INT_MAX || *endptr != '\0')
errx(1, "not a valid number");
break;
case 'n':
modname = optarg;
break;
case 'p':
post = optarg;
break;
default:
usage();
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, "%s", _PATH_LKM);
/*
* Unload the requested module.
*/
ulbuf.name = modname;
ulbuf.id = (int)modnum;
if (ioctl(devfd, LMUNLOAD, &ulbuf) == -1) {
switch (errno) {
case EINVAL:
errx(3, "id out of range");
case ENOENT:
errx(3, "no such module");
default:
err(5, "LMUNLOAD");
}
}
/*
* Execute the post-unload program.
*/
if (post) {
execl(post, post, (char *)NULL);
err(16, "can't exec `%s'", post);
}
exit(0);
}
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