Help regarding pthread and socket

Dear all,

I am beginner in "pthreads and sockets".Problem i am facing is i am not able to "accept" any connection at the server when i use the "pthread library".
The socket descriptor "accept" returns is -1. Please let me know if there is any solution to the above problem.

rgds,
rajat

you'll have to show some code

/**server code***/

#include<pthread.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<stdlib.h>
#include<string.h>
#include<sys/ipc.h>
#include<sys/sem.h>

#define READY 1
#define NOTREADY 0
#define MAX_THREAD 5
#define MAX_BUFFER 100
#define MAX_NAME_SIZE 100
#define MAX_CLIENTS 5
#define REGISTER 1
#define DATA 2
#define PORT 3000
#define _REENTRANT





int main()
{
int sockfd,fd,thread_no=0;
pthread_t thread[MAX_THREAD],tell_thread;
struct sockaddr_in sockcli,sockser;
int slot_no=0,socklen;
int flag=READY;

sockser.sin_family=PF_INET;
sockser.sin_port=PORT;
sockser.sin_addr.s_addr=INADDR_ANY;
sockfd=socket(PF_INET,SOCK_STREAM,0);
if(bind(sockfd,(struct sockaddr *)&sockser,sizeof(sockser))<0)
{
perror("Bind Failed\n");
exit(0);
}
listen(sockfd,5);
pthread_mutex_init(&mutex_ob,NULL);



while(1)/** Accept fails here when linked with pthread library**/
{
fd=accept(sockfd,(struct sockaddr *)&sockcli,&socklen);
printf("Socket fd=%d\n",fd);



if(slot_no!=-1)
{
printf("i am here\n");
if(write(fd,&flag,sizeof(flag))<0)
perror("write failed");
pthread_create(&thread[thread_no++],NULL,rec_data,(void *)&socket_fd[slot_no]);
}
else
{
flag=NOTREADY;
write(fd,&flag,sizeof(flag));

}
}
}

http://compsoc.dur.ac.uk/cgi-bin/man2html?write+2

You're using the write command wrongly.

write system call seems ok. The above program works pecfectly on a standalone PC loaded with linux. But in a network the "accept function" fails.

Could any one tell me why this may happen..?

I could find a solution to the above problem... But i can provide a reason for why it works..... I made a change in the accept function
by calling "accept(fd,0,0);"... Now it gives a socket descriptor..