hi all,
     i have written code for a server program which waits for 
clients to
connect. seperate thread for each client connection. on 
connection
recieves requets, work on requets and then send the result. but 
the
problem is that the threads arent closed on client 
disconnecting.

/***************** start code ******************************/


#define PORT 18000

#include "dougnet.h"
#include "session.h"
#include "common.h"
#include "common1.h"

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <string>
#include <iostream>
#include <fstream>

ReadConf readConf;
ofstream fpLog;

void *session(void *connfd)
{
 	std::string buf1;
 	std::string cmd;
 	int recvCnt;

 	pthread_detach(pthread_self());

 	recvCnt = recv_line((int)connfd, buf1);
 	if(!recvCnt) {
 		return NULL;
 	}/* if(!recvCnt) */
 	writeToLogFile<std::string, std::string, std::string>("buf1 = ", 
buf1, "\n");

 	/*IMP. !!! login part to be added. */
 	recvCnt = recv_line((int)connfd, cmd);
 	if(!recvCnt) {
 		return NULL;
 	}/* if(!recvCnt) */
 	writeToLogFile<std::string, std::string, std::string>("cmd = ", 
cmd, "\n");

 	struct request *rs;

 	for (rs = requests; rs->name != NULL; ++rs) {
 		if(strcmp (cmd.c_str(), rs->name) == 0) {
 			(*rs->func) ((int)connfd, buf1);
 		}/* if(strcmp (cmd.c_str(), rs->name) == 0) */
 	}/* for */
 	writeToLogFile<std::string>("done\n");

 	closesock((int)connfd);
 	writeToLogFile<std::string>("socket closed\n");

 	/* pthread_exit(NULL); */
 	return(NULL);
}/* session() */

int main(int argc, char *argv[])
{
 	int  s, t, res;
 	char tpbuf[16];
 	pthread_t tid;
 	void      *thread_result;

 	s = openlistener(PORT);
 	if(s == (int) NULL) {
 		exit(0);
 	}/* if(s == (int) NULL) */

 	res = readConf.ReadConfFile(CONF_FILE_PATH);
 	if(!res) {
 		printf("error while reading config file %s\n", 
CONF_FILE_PATH);
 		return -1;
 	}/* if(!res) */

 	std::string logfile;
 	logfile = readConf.LogDir() + "/" + readConf.LogFileName();
 	printf("logfile = %s\n", logfile.c_str());

 	fpLog.open(logfile.c_str(), ios::app);

 	while(1) {
 		if(pollsocket(s, 10000)) {
 			t = acceptfromlistener(s, tpbuf);

 			int res = pthread_create(&tid, NULL, &session, (void *)t);
 			if(res) {
 				printf("failed to create thread. %s", strerror(errno));
 			}/* if(res) */

 			printf("Connection from %s\n", tpbuf);

 		}/* if(pollsocket(s, 10000)) */

 		/*
 		res = pthread_join(tid, &thread_result);
 		if(res != 0) {
 			perror("error join");
 			exit(1);
 		}
 		*/
 	}/* while(1) */

 	return 0;
}/* main() */


/***************** end code ******************************/
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