/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <strings.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/modctl.h>
#include <zone.h>
void usage();
void exec_userfile(char *execfile, int id, char **envp);
extern void fatal(char *fmt, ...);
extern void error(char *fmt, ...);
/*
* Unload a loaded module.
*/
int
main(int argc, char *argv[], char *envp[])
{
int child;
int status;
int id;
char *execfile = NULL;
int opt;
extern char *optarg;
if (argc < 3)
usage();
while ((opt = getopt(argc, argv, "i:e:")) != -1) {
switch (opt) {
case 'i':
if (sscanf(optarg, "%d", &id) != 1)
fatal("Invalid id %s\n", optarg);
break;
case 'e':
execfile = optarg;
}
}
if (getzoneid() != GLOBAL_ZONEID) {
fatal("modunload can only be run from the global zone\n");
}
if (execfile) {
child = fork();
if (child == -1)
error("can't fork %s", execfile);
else if (child == 0)
exec_userfile(execfile, id, envp);
else {
(void) wait(&status);
if (status != 0) {
(void) printf("%s returned error %d.\n",
execfile, status);
(void) exit(status >> 8);
}
}
}
/*
* Unload the module.
*/
if (modctl(MODUNLOAD, id) < 0) {
if (errno == EPERM)
fatal("Insufficient privileges to unload a module\n");
else if (id != 0)
error("can't unload the module");
}
return (0); /* success */
}
/*
* exec the user file.
*/
void
exec_userfile(char *execfile, int id, char **envp)
{
struct modinfo modinfo;
char modid[8];
char mod0[8];
modinfo.mi_id = modinfo.mi_nextid = id;
modinfo.mi_info = MI_INFO_ONE;
if (modctl(MODINFO, id, &modinfo) < 0)
error("can't get module information");
(void) sprintf(modid, "%d", id);
(void) sprintf(mod0, "%d", modinfo.mi_msinfo[0].msi_p0);
(void) execle(execfile, execfile, modid, mod0, NULL, envp);
error("couldn't exec %s\n", execfile);
}
void
usage()
{
fatal("usage: modunload -i <module_id> [-e <exec_file>]\n");
}