3 #include <sys/socket.h>
8 char *if_indextoname(unsigned index, char *name)
13 if ((fd = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0) return 0;
14 ifr.ifr_ifindex = index;
15 r = ioctl(fd, SIOCGIFNAME, &ifr);
16 __syscall(SYS_close, fd);
17 return r < 0 ? 0 : strncpy(name, ifr.ifr_name, IF_NAMESIZE);