IPC--消息队列

//rec.c

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

typedef struct {
    long msgtype;
    char msgdata[512];
}msgbuf;

int main()
{
    msgbuf msgRec;
    int iRet = -1;
    int iMsgID = -1;
    //create msgque
    iMsgID = msgget((key_t)1111,0660|IPC_CREAT);
    if(iMsgID == -1){
        printf("error 1!");
        return -1;
    }
    while(1){
       memset(msgRec.msgdata,0x00,sizeof(msgRec.msgdata));
        //rec data param 3 means
        iRet =msgrcv(iMsgID,(void*)&msgRec,512,1,0);

        if(iRet == -1){
            printf("error 2!");
            return -2;
        }
       printf("You wrote: %s
 len is [%d]
",msgRec.msgdata,strlen(msgRec.msgdata));

    }
    return 1;

    if(msgctl(iMsgID, IPC_RMID, 0) == -1)
    {
        printf("error 3!");
            return -3;
    }
}

　　snd.c

input data:
cd^H^H^C
root@ubuntu:/usr/src/ipc# ls
#include<stdlib.h>
#include<stdio.h>
#include<sys/types.h>
#include<sys/ipc.h>
#include<sys/msg.h>

typedef struct {
    long msgtype;
    char msgdata[512];
} msgbuf;


int main()
{
    msgbuf Sendmsg;
    char sBuf[512];
    int iMsgID = -1;
    int iRet = -1;
    //create msgque
    iMsgID = msgget((key_t)1111,0660|IPC_CREAT);
    if(iMsgID == -1){
        printf("error 111!");
        return -1;
    }

    while(1){
        printf("input data:
");
        memset(sBuf,0x00,sizeof(sBuf));
        fgets(sBuf,512,stdin);
        Sendmsg.msgtype = 1;
//      memcpy(Sendmsg.msgdata,sBuf,strlen(sBuf));
        strcpy(Sendmsg.msgdata,sBuf);

        //send
        iRet =msgsnd(iMsgID,(void*)&Sendmsg,strlen(Sendmsg.msgdata),0);
        printf("send data = [%s]
 len = [%d]
",Sendmsg.msgdata,strlen(Sendmsg.msgdata));
        if(iRet == -1){
            printf("error 2");
            return -2;
        }
    }
    return 1;
}

缺少自信的人啊，要快快快快成长！！！