setdescription.c revision 0d688befe378e232b49870c2b110fba4b6bbc7fb
1/*
2 * Copyright (c) 2016-2017, Marie Helene Kvello-Aune
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * thislist of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation and/or
13 * other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
17 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#include <arpa/inet.h>
30#include <net/if.h>
31
32#include <err.h>
33#include <errno.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <libifconfig.h>
38
39
40int
41main(int argc, char *argv[])
42{
43	char *ifname, *ifdescr, *curdescr;
44	ifconfig_handle_t *lifh;
45
46	if (argc != 3) {
47		errx(EINVAL, "Invalid number of arguments."
48		    " First argument should be interface name, second argument"
49		    " should be the description to set.");
50	}
51
52	/* We have a static number of arguments. Therefore we can do it simple. */
53	ifname = strdup(argv[1]);
54	ifdescr = strdup(argv[2]);
55	curdescr = NULL;
56
57	printf("Interface name: %s\n", ifname);
58
59	lifh = ifconfig_open();
60	if (lifh == NULL) {
61		errx(ENOMEM, "Failed to open libifconfig handle.");
62		return (-1);
63	}
64
65	if (ifconfig_get_description(lifh, ifname, &curdescr) == 0) {
66		printf("Old description: %s\n", curdescr);
67	}
68
69	printf("New description: %s\n\n", ifdescr);
70
71	if (ifconfig_set_description(lifh, ifname, ifdescr) == 0) {
72		printf("New description successfully set.\n");
73	} else {
74		switch (ifconfig_err_errtype(lifh)) {
75		case SOCKET:
76			err(ifconfig_err_errno(lifh), "Socket error");
77			break;
78		case IOCTL:
79			err(ifconfig_err_errno(
80				    lifh), "IOCTL(%lu) error",
81			    ifconfig_err_ioctlreq(lifh));
82			break;
83		default:
84			err(ifconfig_err_errno(lifh), "Other error");
85			break;
86		}
87	}
88
89	free(ifname);
90	free(ifdescr);
91	free(curdescr);
92	ifname = NULL;
93	ifdescr = NULL;
94	curdescr = NULL;
95
96	ifconfig_close(lifh);
97	return (0);
98}
99