#include <fcntl.h>
#include <aio.h>
#include <string.h>
#include <stdlib.h>

void aio_test(int fd, char * str)
{
    struct aiocb *iocb;
    int rval;

    iocb = calloc(1, sizeof(struct aiocb));
    iocb->aio_fildes = fd;
    iocb->aio_offset = 0;
    iocb->aio_buf = (void *) malloc(strlen(str));
    memcpy((void *)iocb->aio_buf, str, strlen(str)); 
    iocb->aio_nbytes = strlen(str);
    iocb->aio_sigevent.sigev_notify = SIGEV_NONE;
    rval = aio_write(iocb);
    if (rval < 0)
	    perror("aio_write");
	
}

int main(void)
{
	int fd;
	int oflags;
	fd = open("/tmp/aio.test", O_WRONLY | O_APPEND | O_CREAT, 0644);
	if(fd < 0)  {
		perror("open");
		exit(1);
	}

	if ((oflags = fcntl(fd, F_GETFL, 0)) < 0) {
		perror("fcntl");
		exit(1);
	}

	if (!(oflags & O_APPEND)) {
		printf("O_APPEND is not set\n");
		exit(1);
	}

	aio_test(fd, "1\n");
	aio_test(fd, "2\n");
	aio_test(fd, "3\n");
	aio_test(fd, "4\n");
	aio_test(fd, "5\n");
	close(fd);
}