call_proc
if (call_proc(proc, data, arg, opt->value, outargs, is_opt) == -1)
return call_proc(proc, data, arg, FUSE_OPT_KEY_OPT, outargs, is_opt);
if (call_proc(proc, data, arg, FUSE_OPT_KEY_NONOPT,
u_int32_t call_proc;
call->call_proc = txdr_unsigned(BOOTPARAM_WHOAMI);