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fix shutdown and write logic for handling shutdown command

#include <stdio.h>
#include <aitrpc.h>

//rpc_val_t valz[3];

int main()
{
	rpc_cli_t *cli;
	int c, i, ret;
	rpc_val_t valz[3], *v = NULL;

	cli = rpc_cli_openClient(100, 2, 2, "127.0.0.1", 11111);
	if (!cli) {
		printf("error:: errno=%d %s\n", rpc_GetErrno(), rpc_GetError());
		return 1;
	}

	RPC_SET_I32(&(valz[0]), 12345678);
	RPC_SET_STR(&(valz[1]), "gniah_blah SHMINK!");
	RPC_SET_U16(&(valz[2]), 123);
//	for (i = 0; i < 1000000; i++)
		if ((ret = rpc_cli_execCall(cli, NULL, "BBB", 3, valz, &c, &v)) < 0) {
			printf("error:: errno=%d %s\n", rpc_GetErrno(), rpc_GetError());
			return 2;
		} else {
			printf("ret=%d\n", ret);
			if (c && v) {
				printf("ret_val0:: %p %s len=%d type=%d\n", 
						&v[0], RPC_GET_BUF(&v[0]), RPC_LEN_VAL(&v[0]), RPC_TYPE_VAL(&v[0]));
				printf("ret_val1:: %d len=%d type=%d\n", 
						RPC_GET_I8(&v[1]), RPC_LEN_VAL(&v[1]), RPC_TYPE_VAL(&v[1]));
				printf("ret_val2:: is_empty? %d %s len=%d type=%d\n", 
						RPC_EMPTY_VAL(&v[2]), RPC_GET_STR(&v[2]), RPC_LEN_VAL(&v[2]), RPC_TYPE_VAL(&v[2]));
				RPC_FREE_VAL(&v[0]);
				RPC_FREE_VAL(&v[1]);
				RPC_FREE_VAL(&v[2]);
				rpc_cli_freeVals(c, v);
			}
		}
	RPC_FREE_VAL(&valz[0]);
	RPC_FREE_VAL(&valz[1]);
	RPC_FREE_VAL(&valz[2]);

	if (rpc_cli_execCall(cli, NULL, "aaa", 0, NULL, &c, &v) < 0) {
		printf("error:: errno=%d %s\n", rpc_GetErrno(), rpc_GetError());
		return 3;
	}

	if (rpc_cli_execCall(cli, NULL, CALL_SRVCLIENTS, 0, NULL, &c, &v) < 0) {
		printf("error:: errno=%d %s\n", rpc_GetErrno(), rpc_GetError());
		return 4;
	}
	for (i = 0; i < c; i++)
		printf("registeredClient(%d)=%s\n", i, RPC_GET_STR(&*v));
	rpc_cli_freeVals(c, v);
	if (rpc_cli_execCall(cli, NULL, CALL_SRVCALLS, 0, NULL, &c, &v) < 0) {
		printf("error:: errno=%d %s\n", rpc_GetErrno(), rpc_GetError());
		return 5;
	}
	for (i = 0; i < c; i++)
		printf("registeredCall(%d)=%s\n", i, RPC_GET_STR(&v[i]));
	rpc_cli_freeVals(c, v);
	if (rpc_cli_execCall(cli, NULL, CALL_SRVSESSIONS, 0, NULL, &c, &v) < 0) {
		printf("error:: errno=%d %s\n", rpc_GetErrno(), rpc_GetError());
		return 6;
	}
	printf("c=%d v=%p\n", c, v);
	printf("session(%d:%d:%d) clients=%d\n", (uint8_t) RPC_GET_U8(&v[0]), (uint32_t) RPC_GET_U32(&v[1]), 
			RPC_GET_U32(&v[2]), RPC_GET_I32(&v[3]));
	rpc_cli_freeVals(c, v);

	rpc_cli_execCall(cli, NULL, CALL_SRVSHUTDOWN, 0, NULL, 0, NULL);

	rpc_cli_closeClient(cli);
	return 0;
}