case OS_TYPE_LINUX: ret = safe_strdup (g, "linux"); break;
case OS_TYPE_NETBSD: ret = safe_strdup (g, "netbsd"); break;
case OS_TYPE_WINDOWS: ret = safe_strdup (g, "windows"); break;
case OS_TYPE_LINUX: ret = safe_strdup (g, "linux"); break;
case OS_TYPE_NETBSD: ret = safe_strdup (g, "netbsd"); break;
case OS_TYPE_WINDOWS: ret = safe_strdup (g, "windows"); break;