select 채팅서버 질문입니다.

지금 하고있는데 잘 안풀리네요 ㅠㅠ
select 사용 하고 있는데 ㅠ 왜안되는건지 잘 모르겠어요 ㅠㅠㅠㅠ
read부분의 printf가 안뜨는걸 보니 그쪽으로 안가는거 같기도 하구요 ㅠ
계속 타임아웃만 나옵니다 ㅠㅠ

도와주세요 ㅠㅠ

#include

#include

#include

#include

#include

#include

#include

#include

#define BUF_SIZE 100

void error_handling(char *message);

int main(int argc, char *argv[])

{

int serv_sock, clnt_sock;
struct sockaddr_in serv_addr, clnt_adr;
struct timeval timeout;
fd_set reads, cpy_reads;

socklen_t adr_sz;
int fd_max, str_len, fd_num, i;
char buf[BUF_SIZE];
int sel;

if(argc!=2)
{
printf("Usage: %s
\n", argv[0]);
exit(1);

}

serv_sock=socket(PF_INET,SOCK_STREAM,0);

serv_addr.sin_family=AF_INET;

serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port=htons(atoi(argv[1]));

if(bind(serv_sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)))

error_handling("Bind() Error");

if(listen(serv_sock, 5)==-1)

error_handling("Listen() Error");

printf("Welcome to MyChat \n");

FD_ZERO(&reads);

FD_SET(serv_sock,&reads);

fd_max = serv_sock;

while(1){
cpy_reads=reads;
timeout.tv_sec=5;
timeout.tv_usec=5000;

fd_num=select(fd_max+1, &cpy_reads, 0, 0, &timeout);
if(fd_num==-1)
{
error_handling("select() error");
break;
}
else if(fd_num==0)
{
puts("time out!");
}
else
{
for(i = 0; i {
if(FD_ISSET(i,&cpy_reads))
{
if(i==serv_sock)
{
adr_sz=sizeof(clnt_adr);
clnt_sock=accept(serv_sock, (struct sockaddr*)&clnt_adr, &adr_sz);
FD_SET(clnt_sock, &reads);
printf("accept......!!!!");
}

else
{
str_len=read(clnt_sock, buf, BUF_SIZE);
printf("read...!!");

if(str_len >0)
{
buf[str_len] =0;
printf("From clnt : %s",buf);
}
else
{
fgets(buf, BUF_SIZE, stdin);
write(clnt_sock, buf, BUF_SIZE);
}
}
}
}
}

}
close(serv_sock);
return 0;

}

void error_handling(char *message)

{

fputs(message,stderr);

fputc('\n',stderr);

exit(1);

}