msg_server.c

来自「Linux大学上机源码学习」· C语言 代码 · 共 36 行

#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 msgid;
 long int msg_to_receive=0;
  msgid=msgget(MSGKEY,0777|IPC_CREAT);
  if(msgid==-1)
    { printf("error\n");
      exit(0);
    }
 while(running)
  { if (msgrcv(msgid,(void*)&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);
}