1 /* SPDX-License-Identifier: LGPL-2.1-only */ 2 /* 3 * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch> 4 */ 5 6 #include <netlink/cli/utils.h> 7 #include <netlink/cli/link.h> 8 9 #include <linux/netlink.h> 10 print_usage(void)11static void print_usage(void) 12 { 13 printf("Usage: nl-link-name2ifindex <name>\n"); 14 exit(0); 15 } 16 main(int argc,char * argv[])17int main(int argc, char *argv[]) 18 { 19 struct nl_sock *sock; 20 struct nl_cache *link_cache; 21 uint32_t ifindex; 22 23 if (argc < 2) 24 print_usage(); 25 26 sock = nl_cli_alloc_socket(); 27 nl_cli_connect(sock, NETLINK_ROUTE); 28 link_cache = nl_cli_link_alloc_cache(sock); 29 30 if (!(ifindex = rtnl_link_name2i(link_cache, argv[1]))) 31 nl_cli_fatal(ENOENT, "Interface \"%s\" does not exist", 32 argv[1]); 33 34 printf("%u\n", ifindex); 35 36 return 0; 37 } 38