chatserver.c

聊天程序~使用LINUX c 语言实现~

/* chatserver.c */

#include <stdlib.h>
#include <stdio.h>
#include <cnaiapi.h>

#define BUFFSIZE		256
#define INPUT_PROMPT		"Input_$> "
#define RECEIVED_PROMPT		"Received:> "

int recvln(connection, char *, int);
int readln(char *, int);

int main(int argc, char *argv[]) {

      char *msg="The author of this program is iFreeBSD (version 1.0)\n" ;
	connection	conn;
	int		len;
	char		buff[BUFFSIZE];
      printf(msg) ;

	if (argc != 2) {
		fprintf(stderr, "usage: %s <appnum>\n", argv[0]);
		exit(1);
	}

	printf("OK!Now Waiting For Connection.\n");


	conn = await_contact((appnum) atoi(argv[1]));
	if (conn < 0)
		exit(1);
	
        printf("Connection Established.\n");
	
	

	while((len = recvln(conn, buff, BUFFSIZE)) > 0) {
		 printf(RECEIVED_PROMPT);
		 fflush(stdout);
		 write(STDOUT_FILENO, buff, len);
		
		

		 printf(INPUT_PROMPT);
		 fflush(stdout);
		if ((len = readln(buff, BUFFSIZE)) < 1)
			break;
		buff[len - 1] = '\n';
	      send(conn, buff, len, 0);
	}

	

	send_eof(conn);
	printf("\nClosed.Bye!\n");
	return 0;
}