if (sscanf(interface, PPP_DRV_NAME "%d", &unit) != 1) {
fprintf(stderr, "%s: invalid interface '%s' specified\n",
progname, interface);
}
if (sscanf(interface, PPP_DRV_NAME "%d", &unit) != 1) {
fprintf(stderr, "%s: invalid interface '%s' specified\n",
progname, interface);
}