#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <sys/fcntl.h>
#include <errno.h>

#define BUFSIZE 8192
#define NBLKS   20
#define LEN     30
#define TRUE 1
void
fillbuf(char *buf, int count, char value)
{
        while (count-- > 0) *buf++ = value;
}


int
main(int argc, char *argv[])
{
        int     bufsize = BUFSIZE;      /* Buffer size. Default 8k */
        int     numblks = NBLKS;        /* Number of blocks. Default 20 */
        char    infile[LEN];            /* Input file. Default "infile" */
        int     fd1, fd2;
        int     i, n, offset;
        char    *buf;

        strcpy(infile, "infile");       /* Default input file */
        if ((fd1 = open(infile, O_DIRECT|O_RDWR|O_CREAT, 0666)) < 0) {
                fprintf(stderr, "open infile: %s\n", strerror(errno));
                exit(1);
        }

        /* Allocate for buf, Create input file */
        if ((buf = valloc(bufsize)) == 0) {
                fprintf(stderr, "valloc buf: %s\n", strerror(errno));
        }

        for (i = 0; i < numblks; i++) {
                fillbuf(buf, bufsize, 'Z');
                if (write(fd1, buf, bufsize) == -1) {
                        fprintf(stderr, "write infile failed: %s\n",
                                strerror(errno));
                }
        }
        fprintf(stdout, "test:  completed\n");
        exit(0);

}