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