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