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/*
* src/nl-link-name2ifindex.c Transform a interface name to its index
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
*/
#include <netlink/cli/utils.h>
#include <netlink/cli/link.h>
static void print_usage(void)
{
printf("Usage: nl-link-name2ifindex <name>\n");
exit(0);
}
int main(int argc, char *argv[])
{
struct nl_sock *sock;
struct nl_cache *link_cache;
uint32_t ifindex;
if (argc < 2)
print_usage();
sock = nl_cli_alloc_socket();
nl_cli_connect(sock, NETLINK_ROUTE);
link_cache = nl_cli_link_alloc_cache(sock);
if (!(ifindex = rtnl_link_name2i(link_cache, argv[1])))
nl_cli_fatal(ENOENT, "Interface \"%s\" does not exist",
argv[1]);
printf("%u\n", ifindex);
return 0;
}
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