ex14_echocli.c

linux 高级编程的例子源码,包括了本书上的所有代码

/*filename:ex14_echocli.c*/
#include  "ourhead.h"
#include  "tcp_connect.h"

void usage(char *name)
{
	printf("Usage: %s [hostname or IP address]\n",name);
	return ;
}

int main(int argc,char **argv)
{
	 char *host="127.0.0.1";
    char buf[MAXLINE+1];
    int sockfd,count;

	if (argc!=1&&argc!=2)
	{
		usage(argv[0]);
		exit(1);
	}

	if (argc==2)
	{
		host=argv[1];
	}
	sockfd=tcp_connect(host,"9999");

	while(fgets(buf,MAXLINE,stdin))
	{
		buf[MAXLINE]='\0';
		count=strlen(buf);
		write(sockfd,buf,count);

		if (read(sockfd,buf,count)<0)
        {

			printf("sock read error :%s \n",strerror(errno));
                        exit(1);
        }
		fputs(buf,stdout);
	}
   close(sockfd);
   exit(0);
}