mserver_a_getdata_bk.c

linux下的人机对话编程

/* Mserver_B_getdata_bk.c */
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
	int port=8010;
main()
{
	struct sockaddr_in sin;
	struct sockaddr_in pin;
	int sock_descriptor;
	int temp_sock_descriptor;
	int address_size;
	char x[30];
	char *a="AAAA";
	char *b="BBBB";
	int i,len1,len2;
	FILE *fp; 
while(1)
{
	sock_descriptor=socket(AF_INET,SOCK_STREAM,0);
	if(sock_descriptor==-1)
		{
		perror("call to socket");
         	continue;
		}
	bzero(&sin,sizeof(sin));
	sin.sin_family=AF_INET;
	sin.sin_addr.s_addr=htonl(INADDR_ANY);
	sin.sin_port=htons(port);
	if(bind(sock_descriptor,(struct sockaddr *)&sin,sizeof(sin))==-1)
		{
		perror("call to bind");
		close(sock_descriptor);
		sleep(60);
		continue;
		}
	if(listen(sock_descriptor,20)==-1)
		{
		perror("call to listen");
		close(sock_descriptor);
		continue;
		}
      printf("Accepting connections ...\n");
while(1)
	{
	char buf[16348]={};
temp_sock_descriptor=accept(sock_descriptor,(struct sockaddr *)&pin,&address_size);
	if(temp_sock_descriptor==-1)
		{
		perror("call to accept");
		close(sock_descriptor);
		break;;
		}
	if(recv(temp_sock_descriptor,buf,16384,0)==-1)
		{
		perror("call to recv");
		close(sock_descriptor);
		break;;
		}
      printf("\nReceived form client: %s\n",buf);
// for this server example,we just convert the
// characters to upper case:
	len1=strlen(buf);
	for(i=0;i<len1;i++)	buf[i]=toupper(buf[i]);
		if(strncmp(buf,a,4)==0)
		{ 
		strcpy(x,"\nThis is the  aaaa head.\n");
           	fp=fopen("/mnt/tmp/A.out","a+");
          	if(fp==NULL)printf("error opening!\n");
          	else fputs(buf,fp);
               	fputs(x,fp);
          	fclose(fp);
          	}
        	else if(strncmp(buf,b,4)==0)
       		{
        	strcpy(x,"\nThis is the  bbbb head.\n");
        	fp=fopen("/mnt/tmp/B.out","a+");
          	if(fp==NULL)printf("error opening!\n");
          	else fputs(buf,fp);
               	fputs(x,fp);
         	fclose(fp);
        	}
        	else strcpy(x,"\nERROR!\n");
            	len2=strlen(x);
            	len1+=len2;
        	strcat(buf,x);
	if(send(temp_sock_descriptor,buf,len1,0)==-1)
		{
		perror("call to send");
		close(sock_descriptor);
	        break;;
		} 
	close(temp_sock_descriptor);
    }//while nei bu
 }//while wai bu
}//main