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  ±è¿µ´ë(2003-03-17 02:35:12, Hit : 8096, Vote : 1908
 [System V IPC] msgsnd() function - ¸Þ¼¼ÁöÅ¥

/***************************************************
*   Creat  : 2001. 02. 10  (programed by Cori-Young)
*   Site: http://www.byoneself.co.kr
*   Update :
***************************************************/


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

#define MSGSZ     128

/** Declare the message structure.           */

typedef struct{
        long    mtype;
    char    mtext[MSGSZ];
} message_buf;

main()
{

    int msqid;
    int msgflg = IPC_CREAT | 0666;
    key_t key;
    message_buf sbuf;
    size_t buf_length;

    /** Get the message queue id for the "name" 1234, which was created by the server. */
    key = 1234;

        (void) fprintf(stderr, "nmsgget: Calling msgget(%#lx,%#o)n",key, msgflg);

    if ((msqid = msgget(key, msgflg )) < 0)
    {
        perror("msgget");
        exit(1);
    }
    else
     (void) fprintf(stderr,"msgget: msgget succeeded: msqid = %dn", msqid);

    /** We'll send message type 1   */
    sbuf.mtype = 1;
    (void) fprintf(stderr,"msgget: msgget succeeded: msqid = %dn", msqid);
    (void) strcpy(sbuf.mtext, "In Message");
    (void) fprintf(stderr,"msgget: msgget succeeded: msqid = %dn", msqid);

    buf_length = strlen(sbuf.mtext) ;

    /** Send a message.    */
    if (msgsnd(msqid, &sbuf, buf_length, IPC_NOWAIT) < 0) {
       printf ("%d, %d, %s, %dn", msqid, sbuf.mtype, sbuf.mtext, buf_length);
        perror("msgsnd");
        exit(1);
    }

   else
      printf("Message: "%s" Sentn", sbuf.mtext);
    exit(0);
}





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