6.3.3 FIFO ��

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6.3.3 FIFO �� (FIFO Operations)

FIFO�� I/O �� Ѱ�� ֿ�� ϰ� �� Ϲ� �� . "open" �ý�� ȣ��̳� ��̺귯�� Լ�� ä�� µ� ��Ǿ�� Ѵ�. �� ý�� ƴ�, Ŀ�ο� �� ʿ��ϴ�. �� 츮�� fopen()�� , fclose()�� ݴ� ��Ʈ��(stream)ó�� ٷ� �� ̴�.

�� μ�� 캸��:

/*****************************************************************************
 ������ ���α׷��Ӹ� ���� ���̵� - 6�� ���� ����
 (C)opyright 1994-1995, Scott Burkett
 ***************************************************************************** 
 MODULE: fifoserver.c
 *****************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>

#include <linux/stat.h>

#define FIFO_FILE       "MYFIFO"

int main(void)
{
        FILE *fp;
        char readbuf[80];

	/*�������� �������� ������ �����*/
        umask(0);
        mknod(FIFO_FILE, S_IFIFO|0666, 0);

        while(1)
        {
                fp = fopen(FIFO_FILE, "r");
                fgets(readbuf, 80, fp);
                printf("Received string: %s\n", readbuf);
                fclose(fp);
        }

        return(0);
}

��Ʈ�� FIFO�� ܵ��, �� Ŀ� ��׶�� server�� Ѷ�:

        $ fifoserver&

�� FIFO�� ۿ� �� ϰڴ�. ��, �� Ŭ��̾�Ʈ ��ȯ��(frontend)�� 캸��:

/*****************************************************************************
 ������ ���α׷��Ӹ� ���� ���̵� - 6�� ���� ����
 (C)opyright 1994-1995, Scott Burkett
 ***************************************************************************** 
 MODULE: fifoclient.c
 *****************************************************************************/

#include <stdio.h>
#include <stdlib.h>

#define FIFO_FILE       "MYFIFO"

int main(int argc, char *argv[])
{
        FILE *fp;

        if ( argc != 2 ) {
                printf("USAGE: fifoclient [string]\n");
                exit(1);
        }

        if((fp = fopen(FIFO_FILE, "w")) == NULL) {
                perror("fopen");
                exit(1);
        }

        fputs(argv[1], fp);

        fclose(fp);
        return(0);
}

��:6.3.2 FIFO �� ��:6.3.4 FIFO��

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LAST UPDATE Nov 15,1997
Created Nov 15,1997

6.3.3 FIFO ���� (FIFO Operations)

6.3.3 FIFO �� (FIFO Operations)