1 /* SPDX-License-Identifier: LGPL-2.1-only */ 2 /* 3 * Copyright (c) 2003-2009 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-ifindex2name <ifindex>\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 char name[IFNAMSIZ]; 22 uint32_t ifindex; 23 24 if (argc < 2) 25 print_usage(); 26 27 sock = nl_cli_alloc_socket(); 28 nl_cli_connect(sock, NETLINK_ROUTE); 29 link_cache = nl_cli_link_alloc_cache(sock); 30 31 ifindex = nl_cli_parse_u32(argv[1]); 32 33 if (!rtnl_link_i2name(link_cache, ifindex, name, sizeof(name))) 34 nl_cli_fatal(ENOENT, "Interface index %d does not exist", 35 ifindex); 36 37 printf("%s\n", name); 38 39 return 0; 40 } 41