167 lines
4.1 KiB
C
167 lines
4.1 KiB
C
/*
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* modunload.c
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*
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* This is the loadable kernel module unload program. The interface
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* is nearly identical to the SunOS 4.1.3 not because I lack
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* imagination but because I liked Sun's approach in this particular
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* revision of their BSD-derived OS.
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*
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* modunload [-i <module id>] [-n <module name>]
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*
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* Default behaviour is to provide a usage message.
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*
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* -i <module id> - unload module by id
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* -n <module name> - unload module by name
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*
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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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* $Id: modunload.c,v 1.2 1993/06/07 23:10:37 cgd Exp $
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*/
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#define printf I_HATE_ANSI
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#include <stdio.h>
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#undef printf
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#include <stdlib.h>
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/mount.h>
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#include <sys/exec.h>
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#include <sys/lkm.h>
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#include <a.out.h>
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#include <sys/file.h>
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#include <sys/errno.h>
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extern int errno; /* should be in errno.h*/
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#ifdef sun
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/* these are defined in stdlib.h for everything but sun*/
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extern char *optarg;
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extern int optind;
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#endif /* sun*/
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#define LKM_DEV "/dev/lkm"
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extern int dostat();
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usage()
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{
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fprintf( stderr, "usage:\n");
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fprintf( stderr,
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"modunload [-i <module id>] [-n <module name>]\n");
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exit( 1);
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}
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main( ac, av)
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int ac;
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char *av[];
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{
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int devfd;
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int ch;
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int err = 0;
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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( ( ch = getopt( ac, av, "i:n:")) != EOF) {
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switch(ch) {
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case 'i': modnum = atoi( optarg); break; /* number*/
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case 'n': modname = optarg; break; /* name*/
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case '?': usage();
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default: printf( "default!\n");
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}
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}
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ac -= optind;
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av += optind;
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if( ac != 0)
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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 retrive the loaded module(s) status).
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*/
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if( ( devfd = open( LKM_DEV, O_RDWR, 0)) == -1) {
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perror( LKM_DEV);
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exit( 2);
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}
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/*
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* Not specified?
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*/
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if( modnum == -1 && modname == NULL)
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usage();
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/*
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* Unload the requested module.
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*/
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/*
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if( modname != NULL)
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strcpy( ulbuf.name, modname);
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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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fprintf( stderr, "modunload: id out of range\n");
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err = 3;
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break;
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case ENOENT: /* no such entry*/
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fprintf( stderr, "modunload: no such module\n");
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err = 4;
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break;
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default: /* other error (EFAULT, etc)*/
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perror( "LMUNLOAD");
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err = 5;
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break;
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}
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}
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done:
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close( devfd);
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exit( err);
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}
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/*
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* EOF -- This file has not been truncated.
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*/
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