in src/main.c [15:23]
void print_help(const char *program)
{
printf("Usage: %s [-d|--debug] [-u|--udev|-h|--help|-v|--version]\n", program);
printf(" -d, --debug Enable debug mode\n");
printf(" -f, --format {plain|json} Output format (default=plain)\n");
printf(" -h, --help Display this help message\n");
printf(" -u, --udev Enable udev mode\n");
printf(" -v, --version Display the version\n");
}