#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
int main(int argc, char *argv[])
{
    if (argc != 2) {
        printf("./fifo_r <filename>\n");
        return -1;
    }
    int fd = open(argv[1], O_RDONLY);

    char buf[256];
    int ret;
    while(1)
    {
        //循环读
        //需要清楚一下缓存
        memset(buf, 0x00, sizeof(buf));
        ret = read(fd, buf, sizeof(buf));
        if(ret > 0)
        {
            printf("read:%s\n", buf);
        }
    }
    close(fd);

    return 0;
}