#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define FILENAME "testfile.txt"
#define STRLEN 50
#define NUMWRITES 10000

char *getrandstring() {
  int i;
  static char buf[STRLEN];

  for (i=0; i<STRLEN; i++) {
    buf[i] = (rand() % 28) +65; 
  }
  return buf;
}

int libciotest() {
  FILE *fp;
  int i;
 // Open file
  fp = fopen(FILENAME, "w");
  if (!fp) {
    printf("Could not open %s\n", FILENAME);
    return -1;
  }
  // DO writes
  for (i=0; i<NUMWRITES; i++) {
    fwrite(getrandstring(), STRLEN, 1, fp);
  }
}

int rawiotest() {
  int fd;
  int i;

  fd = open(FILENAME, O_WRONLY);
  if (fd==-1) {
    printf("Could not open %s\n", FILENAME);
    return -1;
  }
  // DO writes
  for (i=0; i<NUMWRITES; i++) {
    write(fd, getrandstring(), STRLEN);
  }
  close(fd);
}

int main() {
  //libciotest();
  //rawiotest();
}