libsvm/common/modops.c

	modops.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/errno.h>
#include <sys/modctl.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <svm.h>

/*
 * FUNCTION: get modid
 *  Given a module name returns module id.
 *
 * INPUT: module name
 *
 * RETURN VALUES:
 *      > 0 SUCCESS
 *              -1 FAIL
 */

static int
get_modid(char *modname)
{
    struct modinfo modinfo;
    int id;
    int rval = RET_ERROR;

    id = -1; /* look for all modules */

    modinfo.mi_id = modinfo.mi_nextid = id;
    modinfo.mi_info = MI_INFO_ALL | MI_INFO_NOBASE;

    do {
        if (modctl(MODINFO, id, &modinfo) < 0)
            break;

        modinfo.mi_name[MODMAXNAMELEN - 1] = '\0';
        /* if we find a match break out */
        if (strcmp(modinfo.mi_name, modname) == 0) {
            rval = modinfo.mi_id;
            break;
        }
    /* LINTED */
    } while (1);

    return (rval);
}

/*
 * FUNCTION: mod_unload
 *  unload a module.
 *
 * INPUT: module name
 *
 * RETURN VALUES:
 *  0 - SUCCESS
 *  !0 - FAIL
 *      > 0 errno
 *      -1
 * NOTE: If we fail to get the module id because the module is not
 * currently loaded we still want to try to force a reload of the
 * .conf file when it does load.
 */
int
mod_unload(char *modname)
{
    int id;
    major_t major;
    int rval = RET_SUCCESS;

    id = get_modid(modname);

    if (id != -1) {
        if (modctl(MODUNLOAD, id) < 0) {
            rval = errno;
        }
    }

    if ((modctl(MODGETMAJBIND, modname, strlen(modname) + 1,
        &major)) != 0) {
        return (errno);
    }

    if ((modctl(MODUNLOADDRVCONF, major) != 0) ||
        (modctl(MODLOADDRVCONF, major) != 0)) {
        return (errno);
    }

    return (rval);
}