fifo_buf_test.c

#include <stdio.h>
#include <unistd.h>
#include <limits.h>
#include <sys/stat.h>
#include <fcntl.h>

int main(void)
{
    char c = 'c';
    int i;
    const char *fifo = "/tmp/testforfifobuf";

    fprintf(stdout, "Fifo Creation\n");
    mkfifo(fifo, 0777);
    
    struct stat _st;
    int ret = stat(fifo, &_st);
    if(ret != 0) {
        fprintf(stdout, "Fifo Creation Failed, Exit!\n");
        return -1;
    }

    fprintf(stdout, "Theoretical max size: %d\n", PIPE_BUF);

    int fifo_fd = open(fifo, O_RDWR | O_NONBLOCK);

    fprintf(stdout, "Writing in fifo\n");
    for(i=0;; i++)
    {
        if( write(fifo_fd, &c, 1) == -1)
        {
            perror("Write");
            _exit(1);
        }
        fprintf(stdout, "%d bytes written\n", i+1);
    }
    return 0;
}