#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/types.h>#include <sys/utsname.h>#include <semaphore.h>#include <pthread.h>#include <unistd.h>#include <locale.h>#include <langinfo.h>#include <sys/utsname.h>#include <pwd.h>#include "ipmsg.h"#include "msglist.h"#include "userlist.h"#include "staff.h"#include "udp_comm.h"#define MSG_MAX 100struct passwd *local_user;struct utsname local_host;int utf8=0;int main(int argc,char **argv){	pthread_t guide_t,msg_recv_t,msg_proc_t,usr_check_t;	uname(&local_host);	local_user = getpwuid(getuid());	if(setlocale(LC_CTYPE,""))	{		if(!strcmp(nl_langinfo(CODESET),"UTF-8"))			utf8=1;	}		INIT_MSGLIST(ipmsg_msglist);	INIT_USERLIST(ipmsg_usrlist);	sem_init(&NE_MSGLIST,0,0);	sem_init(&NF_MSGLIST,0,MSG_MAX);		init_socket();	login();	pthread_create(&guide_t,NULL,&program_guide,NULL);	pthread_create(&msg_recv_t,NULL,&msg_receiver,&msg_sock_fd);	pthread_create(&msg_proc_t,NULL,&msg_processor,&msg_sock_fd);	pthread_create(&usr_check_t,NULL,&user_checker,NULL);		pthread_join(guide_t,NULL);	pthread_join(msg_recv_t,NULL);	pthread_join(msg_proc_t,NULL);	pthread_join(usr_check_t,NULL);	return 0;}