技術標籤：c語言linux

linux系統程式設計——訊息佇列對資料進行收發

0777可讀可寫可執行

傳送資料

#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <string.h>

//1.int msgget(key_t key, int msgflg);

//2. int msgsnd(int msqid, const void *msgp, size_t msgsz, int msgflg);

//       ssize_t msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp,
 

  //                    int msgflg);


  struct msgbuf {
               long mtype;   //型別
               char mtext[128];    //內容
           };


int  main()
{
     
	//1.獲取並建立佇列
	
       struct  msgbuf   sendbuf={888,"this is from que"};
       struct  msgbuf   readbuf;

        int msgId=msgget
 
(0x1235,IPC_CREAT|0777);
        
	   if(msgId==-1)
        {
	      printf("get msg failed\n");
	   }

	msgsnd(msgId,&sendbuf,strlen(sendbuf.mtext),0);
              
	printf("send over\n");
	  
	msgrcv(msgId,&readbuf,sizeof(readbuf.mtext),988,0);

   printf("return  from get:%s\n"
 
,readbuf.mtext);

   return  0;
}

接受資料

#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <string.h>

//1.int msgget(key_t key, int msgflg);

//2. int msgsnd(int msqid, const void *msgp, size_t msgsz, int msgflg);

//       ssize_t msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp,
  //                    int msgflg);


  struct msgbuf {
               long mtype;   //型別
               char mtext[128]; //內容
           };

int  main()
{
     
	//1.獲取並建立佇列
	
        struct  msgbuf   readbuf;

        int msgId=msgget(0x1235,IPC_CREAT|0777);
        
	if(msgId==-1)
        {
	      printf("get msg failed\n");
	    }

	//2.接受
	  msgrcv(msgId,&readbuf,sizeof(readbuf.mtext),888,0);
	  printf("read from que:%s\n",readbuf.mtext);

	  struct  msgbuf   sendbuf={988,"thank your for reach"};
      msgsnd(msgId,&sendbuf,strlen(sendbuf.mtext),0);

      return  0;
}

傳送：

接受：

——@上官可程式設計