server2.txt

实现关于操作系统客户服务器的服务器端

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#define MSGKEY 75                      
struct my_msg
  {long mtype;
   char text[256];
  };
main()
{ struct my_msg msgbuf;
  int running=1;
  int login=1;  
  char username[10]; 
  char password[5];    
  int msgid;
  long int msg_to_receive=0;
  msgid=msgget(MSGKEY,0777|IPC_CREAT);
  if(msgid==-1)
    { printf("error\n");
      exit(0);
    }
while(login)
{
printf("Please Enter the username:");
scanf("%s",username);
printf("\nPlease Enter the password:");
scanf("%s",password);
if((strncmp(username,"jsj051070",9)==0)&&(strncmp(password,"123",3)==0))
{
printf("\nLogin Successfull\n");
login=0;
}
else
{
printf("\nLogin Fail,please try again!\n");
}
}

 while(running)
  { 
  printf("enter some text:");                   
  fgets(msgbuf.text,256,stdin);               
    msgbuf.mtype=1;                           
   if (msgsnd(msgid,&msgbuf,256,0)==-1)       
       {  printf(" msgsnd error\n");
         exit(0);}
   if (strncmp(msgbuf.text,"end",3)==0)       
         running=0;

 if (msgrcv(msgid,&msgbuf,256,msg_to_receive,0)==-1)   
     {  printf(" msgrcv error\n");
         exit(0);}
   printf("you wrote:%s",msgbuf.text);                
   if (strncmp(msgbuf.text,"end",3)==0)
         running=0;
   
 }
 if(msgctl(msgid,IPC_RMID,0)==-1)                 
  {  printf("msgctl(IPC_RMID)error");
     exit(1);
 }
 exit(0);
}