Linux Cメッセージキュー練習(自己練習記録のみ)

			                 ，            id        ，                

#include 
#include 
#include 
#include 
#include 
#include 
#include 
struct sen_usg{
        long mtype;
        pid_t cpid;
        char msg[500];
};
struct send{
        long mytype;
        char input[256];
};
int  main( void )
{
        int msgid,ret,pid,key,key1,msgid1;
        struct sen_usg  snd_msg;
        struct send send_p;
        pid = getpid();
        key = ftok( "/tmp", 0 );
        key1= ftok( "/tmp", 9 );
        if((key<0)||(key1<0))
        {
                perror("key fail 
");
                return -1;
        }
        msgid1= msgget ( key1,IPC_CREAT|0644 );
        msgid = msgget ( key, IPC_CREAT|0644 );
if((msgid==-1)||(msgid1==-1))
        {
                perror(" msgget failure --->");
                return -2;
        }
        printf("key:%xkey1:%x  msgid:%d msgid1:%d           
", key,key1,msgid,msgid1);
        /*       */
                snd_msg.mtype=snd_msg.cpid=getpid();
                sprintf(snd_msg.msg, "--->  %d         ,snd_msg.cpid);
        ret = msgsnd( msgid,(void *)&snd_msg, sizeof(snd_msg)-sizeof(long), 0);
        if( ret<0 )
        {
                perror("msgsnd failure--->");
                return -3;
        }
        /*       */
        int n=msgrcv(msgid1,(void *)&send_p,sizeof(send_p)-sizeof(long),(long)pid,0);
        if(n<0){
                perror("         
");
                return -4;
        }
                printf("             【%s】:
",send_p.input);
        return 0;
}

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
struct send{
        long mtype;
        char input[256];
};
struct msgbuf {
               long mtype;
               int id;
               char Mess[500];
};
int  main( void )
{
        key_t key,key1;
        int msgid,ret,msgid2;
        struct msgbuf  msg;
        struct send send_p;
        key = ftok( "/tmp", 0 );
        key1=ftok("/tmp",9);
        if(key1<0){
                perror("fail
");
        }
        if(key<0){
                perror("fail
");
        }
        msgid = msgget ( key, IPC_CREAT|0644 );
        msgid2= msgget ( key1, IPC_CREAT|0644 );
          if(msgid==-1)
        {
                perror(" msgget fail --->");
                return -2;
        }
        printf("key:%xkey1:%x  msgid:%d msgid1:%d           
", key,key1,msgid,msgid2);
        /*           */
        while(1){
        ret = msgrcv( msgid,(void *)&msg, sizeof(msg)-sizeof(long), 0, 0);
        if( ret<0 )
        {
                perror(" read msg failure......");
                return -3;
        }
        printf("    [%d]      :【%s】
",msg.id,msg.Mess);
        /*           */
        send_p.mtype=msg.id;
        sprintf(send_p.input,"  [%d]     ",msg.id);
        int Send=msgsnd(msgid2,(void *)&send_p,sizeof(send_p)-sizeof(long),0);
        if(Send<0){
                perror("      
");
                return -1;
        }
        }
        return 0;
}