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      1 /*	$NetBSD: k_helper3.c,v 1.3 2012/04/17 21:39:19 martin Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jukka Ruohonen.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 #include <sys/cdefs.h>
     32 __RCSID("$NetBSD: k_helper3.c,v 1.3 2012/04/17 21:39:19 martin Exp $");
     33 
     34 #include <sys/module.h>
     35 
     36 #include <assert.h>
     37 #include <errno.h>
     38 #include <stdarg.h>
     39 #include <stdio.h>
     40 #include <stdlib.h>
     41 #include <string.h>
     42 
     43 #include <prop/proplib.h>
     44 
     45 static int load(const char *, ...);
     46 
     47 /*
     48  * A program that loads a module and returns the errno(2) from modctl(8).
     49  */
     50 int
     51 main(int argc, char *argv[])
     52 {
     53 	assert(argc == 3);
     54 
     55 	return load(argv[1], argv[2]);
     56 }
     57 
     58 static __printflike(1, 2) int
     59 load(const char *fmt, ...)
     60 {
     61 	char filename[MAXPATHLEN], *propsstr, *shortname, *dot;
     62 	prop_dictionary_t props;
     63 	modctl_load_t ml;
     64 	int serrno, rv;
     65 	va_list ap;
     66 
     67 	props = prop_dictionary_create();
     68 	propsstr = prop_dictionary_externalize(props);
     69 	assert(propsstr != NULL);
     70 	prop_object_release(props);
     71 
     72 	va_start(ap, fmt);
     73 	(void)vsnprintf(filename, sizeof(filename), fmt, ap);
     74 	va_end(ap);
     75 
     76 	ml.ml_filename = filename;
     77 	ml.ml_flags = 0;
     78 	ml.ml_props = propsstr;
     79 	ml.ml_propslen = strlen(propsstr);
     80 
     81 	printf("Loading module %s\n", filename);
     82 	errno = serrno = 0;
     83 
     84 	rv = modctl(MODCTL_LOAD, &ml);
     85 
     86 	if (rv != 0)
     87 		serrno = errno;
     88 
     89 	shortname = strrchr(filename, '/');
     90 	if (shortname != NULL)
     91 		shortname++;
     92 	else
     93 		shortname = filename;
     94 	dot = strrchr(shortname, '.');
     95 	if (dot)
     96 		*dot = 0;
     97 	(void)modctl(MODCTL_UNLOAD, shortname);
     98 
     99 	free(propsstr);
    100 
    101 	return serrno;
    102 }
    103