#include	"unpthread.h"void	*copyto(void *);static int	sockfd;		/* global for both threads to access */static FILE	*fp;voidstr_cli(FILE *fp_arg, int sockfd_arg){	char		recvline[MAXLINE];	pthread_t	tid;	sockfd = sockfd_arg;	/* copy arguments to externals */	fp = fp_arg;	Pthread_create(&tid, NULL, copyto, NULL);	while (Readline(sockfd, recvline, MAXLINE) > 0)		Fputs(recvline, stdout);}void *copyto(void *arg){	char	sendline[MAXLINE];	while (Fgets(sendline, MAXLINE, fp) != NULL)		Writen(sockfd, sendline, strlen(sendline));	Shutdown(sockfd, SHUT_WR);	/* EOF on stdin, send FIN */	return(NULL);		/* 4return (i.e., thread terminates) when end-of-file on stdin */}