client.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <time.h>
#define MAXLINE 1024
#define FILENAME "./server.c"
void client()
{
	struct sockaddr_in serv;
	char buf[MAXLINE];
	int fd;
	FILE *fp;
	bzero(&serv, sizeof(serv));
	serv.sin_family = PF_INET;
	serv.sin_port = htons(8000);
	serv.sin_addr.s_addr = inet_addr("127.0.0.1");
	fd = socket(PF_INET, SOCK_STREAM, 0);
	connect(fd, (struct sockaddr *)&serv, sizeof(serv));
	fp = fopen(FILENAME, "r");
	while (fgets(buf, MAXLINE, fp)) {
		write(fd, buf, strlen(buf)+1);
		read(fd, buf, MAXLINE);
		printf("From server: %s", buf);
		sleep(rand()%5);
	}
	close(fd);
	fclose(fp);
}
int main()
{
	int i; 
	srand(time(NULL));
	signal(SIGCHLD, SIG_IGN);
	for (i=1; i<10; i++) if (!fork()) break;
	client();
	exit(0);
}