1/*
2 * src/nl-link-ifindex2name.c     Transform a interface index to its name
3 *
4 *	This library is free software; you can redistribute it and/or
5 *	modify it under the terms of the GNU Lesser General Public
6 *	License as published by the Free Software Foundation version 2.1
7 *	of the License.
8 *
9 * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
10 */
11
12#include <netlink/cli/utils.h>
13#include <netlink/cli/link.h>
14
15static void print_usage(void)
16{
17	printf("Usage: nl-link-ifindex2name <ifindex>\n");
18	exit(0);
19}
20
21int main(int argc, char *argv[])
22{
23	struct nl_sock *sock;
24	struct nl_cache *link_cache;
25	char name[IFNAMSIZ];
26	uint32_t ifindex;
27
28	if (argc < 2)
29		print_usage();
30
31	sock = nl_cli_alloc_socket();
32	nl_cli_connect(sock, NETLINK_ROUTE);
33	link_cache = nl_cli_link_alloc_cache(sock);
34
35	ifindex = nl_cli_parse_u32(argv[1]);
36
37	if (!rtnl_link_i2name(link_cache, ifindex, name, sizeof(name)))
38		nl_cli_fatal(ENOENT, "Interface index %d does not exist",
39			     ifindex);
40
41	printf("%s\n", name);
42
43	return 0;
44}
45