/*      $NetBSD: k_helper3.c,v 1.3 2012/04/17 21:39:19 martin Exp $ */

/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jukka Ruohonen.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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/cdefs.h>
__RCSID("$NetBSD: k_helper3.c,v 1.3 2012/04/17 21:39:19 martin Exp $");

#include <sys/module.h>

#include <assert.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <prop/proplib.h>

static int load(const char *, ...);

/*
* A program that loads a module and returns the errno(2) from modctl(8).
*/
int
main(int argc, char *argv[])
{
       assert(argc == 3);

       return load(argv[1], argv[2]);
}

static __printflike(1, 2) int
load(const char *fmt, ...)
{
       char filename[MAXPATHLEN], *propsstr, *shortname, *dot;
       prop_dictionary_t props;
       modctl_load_t ml;
       int serrno, rv;
       va_list ap;

       props = prop_dictionary_create();
       propsstr = prop_dictionary_externalize(props);
       assert(propsstr != NULL);
       prop_object_release(props);

       va_start(ap, fmt);
       (void)vsnprintf(filename, sizeof(filename), fmt, ap);
       va_end(ap);

       ml.ml_filename = filename;
       ml.ml_flags = 0;
       ml.ml_props = propsstr;
       ml.ml_propslen = strlen(propsstr);

       printf("Loading module %s\n", filename);
       errno = serrno = 0;

       rv = modctl(MODCTL_LOAD, &ml);

       if (rv != 0)
               serrno = errno;

       shortname = strrchr(filename, '/');
       if (shortname != NULL)
               shortname++;
       else
               shortname = filename;
       dot = strrchr(shortname, '.');
       if (dot)
               *dot = 0;
       (void)modctl(MODCTL_UNLOAD, shortname);

       free(propsstr);

       return serrno;
}