learner1.c

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <string.h>
#include <stdlib.h>

int main()
{
	int fd;
	int address_len;
	struct sockaddr_in address;
	int listenfd;
	fd=socket(AF_INET, SOCK_STREAM ,0);

	address.sin_family = AF_INET;
	address.sin_addr.s_addr = inet_addr("127.0.0.1");
	address.sin_port = htons(8888);
	address_len = sizeof(address);
	bind(fd,(struct sockaddr *)&address, address_len);

	listenfd = listen(fd,100);
	
	while(1)
	{
		struct sockaddr_in client_address;
		int len;
		int client_sockfd;
		printf("Learner waiting...\n");
		fflush(stdout);

		len = sizeof(client_address);
		client_sockfd = accept(fd,(struct sockaddr *)&client_address, &len);
		int pid;
		if(pid = fork()==0)
		{
			close(listenfd);
			while(1)
			{
				char data2[100];
				memset((void *)data2,0,100);
				read(client_sockfd, (void *)data2,100);
				if(strlen(data2)==0)
				{
					close(client_sockfd);
					exit(0);
				}
				printf("Server read line:%s\n",data2+4);
			}	
			close(client_sockfd);
			exit(0);
		}
	}
}